JP6100196B2 - Secondary battery testing equipment - Google Patents

Description

  The present invention relates to a secondary battery testing apparatus.

  Conventionally, various tests such as a safety test and a charge / discharge test are performed on a secondary battery such as a lithium ion battery before shipping the product. These tests are performed using a test apparatus having a test tank. The test is performed in a state where a secondary battery as a sample is accommodated in the test tank and electric power is supplied to the secondary battery. If the secondary battery has a defect, the secondary battery may ignite inside the test tank.

  Therefore, a test apparatus that performs such a test may be provided with a fire extinguishing apparatus that sprays a fire extinguishing agent inside the test tank when the secondary battery ignites. However, in the configuration provided with the fire extinguishing device, the fire extinguishing agent is sprayed inside the test tank at the time of ignition, so the sprayed fire extinguishing agent adheres to the inner wall of the test tank. Therefore, before the test is restarted, a cleaning operation for removing the fire extinguishing agent adhering to the inside of the test tank is necessary, and it takes time to restart the test.

Therefore, as a technique for preventing the ignition of the battery without using a fire extinguishing agent, in the test apparatus described in Patent Document 1, when the abnormality of the battery is detected, the support of the battery is released and the battery is placed inside the water tank. It has a structure to be submerged . Ie, the test apparatus, and a water tank to submerge the battery when the supporting device for releasing the support of the battery when an abnormality detection of the battery, the support by the support device is released.

JP2012-169092A

  However, in the test apparatus having the above water tank, the water inside the water tank is left at room temperature or the environmental temperature inside the test tank during the test, so that the battery is cooled even if the battery is submerged in the water tank when an abnormality is detected. There is a problem that it takes time.

  The present invention has been made in view of the above-described circumstances, and provides a secondary battery test apparatus capable of rapidly cooling a secondary battery when an abnormality occurs in a secondary battery that is a sample. For the purpose.

In order to solve the above problems, a secondary battery test apparatus according to claim 1 of the present invention is a test apparatus for testing a secondary battery as a sample, and a test for accommodating the secondary battery. A tank, an abnormality detection unit for detecting an abnormality of the secondary battery, a liquid medium cooling unit for cooling a liquid medium for cooling the secondary battery, and the secondary battery is cooled using the liquid medium Based on the abnormality detection of the secondary battery by the secondary battery cooling unit and the abnormality detection unit , the liquid medium cooling unit is controlled to start cooling the liquid medium, and the liquid medium cooling unit And a control unit that controls the secondary battery cooling unit to cool the secondary battery using the cooled liquid medium.

According to such a configuration, when an abnormality such as a rapid rise in the temperature of the secondary battery as a sample occurs during the test, the abnormality detection unit detects the abnormality. At that time, the liquid medium cooling unit starts cooling the liquid medium, and the secondary battery cooling unit cools the secondary battery using the liquid medium cooled by the liquid medium cooling unit. Thereby, the secondary battery can be rapidly cooled using the cooled liquid medium. As a result, the secondary battery can be prevented from firing or exploding.

  Further, the control unit controls the liquid medium cooling unit to cool the liquid medium based on the first stage abnormality detection of the secondary battery by the abnormality detection unit, and the abnormality detection unit It is preferable to control the secondary battery cooling unit so as to cool the secondary battery using the liquid medium based on the second stage abnormality detection of the secondary battery.

  According to such a configuration, first, when a first-stage abnormality is detected by the abnormality detection unit, the liquid medium for cooling the secondary battery is cooled by the liquid-medium cooling unit, and then the second-stage abnormality is detected. If detected, the secondary battery cooling unit cools the secondary battery using the cooled liquid medium. Therefore, it is possible to rapidly cool the secondary battery using the cooled liquid medium to prevent ignition or explosion of the secondary battery. Moreover, even if the first stage abnormality occurs, if the second stage abnormality does not occur, it is possible to stand by without cooling the secondary battery using the liquid medium, so the liquid medium is used. The frequency can be suppressed, and as a result, the number of times the test of the secondary battery is interrupted can be reduced.

  In addition, the abnormality detection unit includes a temperature measurement unit that measures the temperature of the secondary battery, and the abnormality detection unit detects the temperature when the temperature of the secondary battery reaches a first abnormality reference value. It is preferable to detect a first-stage abnormality and detect the second-stage abnormality when the temperature of the secondary battery reaches a second abnormality reference value that is higher than the first abnormality reference value.

  According to such a configuration, the abnormality detection unit detects an abnormality based on the temperature of the secondary battery. That is, the abnormality detection unit detects a first-stage abnormality when the temperature of the secondary battery reaches the first abnormality reference value, and the second abnormality in which the temperature of the secondary battery is higher than the first abnormality reference value. A second level abnormality is detected when the reference value is reached. As a result, the secondary battery is rapidly cooled using the cooled liquid medium after the operation of cooling the liquid medium by the liquid medium cooling unit as the temperature of the secondary battery rises. Is possible.

  The secondary battery cooling unit is preferably a liquid medium supply unit that cools the secondary battery by supplying the liquid medium cooled by the liquid medium cooling unit to the secondary battery.

  According to this configuration, the secondary battery can be rapidly cooled by supplying the liquid medium cooled by the liquid medium cooling unit to the secondary battery. As a result, the secondary battery can be prevented from firing or exploding.

  The mounting unit further includes a mounting unit on which the secondary battery is mounted. The mounting unit covers the bottom wall on which the secondary battery is mounted and the bottom wall by covering the periphery of the secondary battery. Moreover, it is preferable to have the surrounding wall which forms a space part.

  According to such a configuration, when the liquid medium is supplied to the secondary battery placed on the bottom wall of the placement part, the liquid medium is stored in a space part surrounded by the bottom wall and the peripheral wall. It is possible to cool the secondary battery more rapidly by immersing the secondary battery in the liquid medium stored in the space.

  The liquid medium storing part that stores the liquid medium cooled by the liquid medium cooling part is further provided, and the secondary battery cooling part includes the liquid medium storing part in which the liquid medium is stored in the secondary battery. It is preferable that it is a moving part which cools the said secondary battery by moving to.

  According to such a configuration, the moving unit can rapidly cool the secondary battery using the liquid medium cooled by the liquid medium cooling unit by moving the secondary battery to the liquid medium storage unit. . As a result, the secondary battery can be prevented from firing or exploding.

  Further, the liquid medium cooling unit preferably cools the liquid medium to −30 to −60 ° C.

  According to this configuration, the secondary battery can be rapidly cooled using the liquid medium cooled to an extremely low temperature of −30 to −60 ° C. by the liquid medium cooling unit.

  Moreover, it is preferable that the said liquid-medium cooling part has a heat exchanger which performs heat exchange between the said liquid medium and the cooling fluid which cools the said liquid medium.

  According to this configuration, the liquid medium can be rapidly cooled by exchanging heat between the liquid medium and the cooling fluid via the heat exchanger.

  The cooling fluid is preferably a liquefied gas.

  According to this configuration, it is possible to rapidly cool the liquid medium to an extremely low temperature by exchanging heat between the liquid medium and the liquefied gas.

  Moreover, it is preferable that the said liquid-medium cooling part is equipped with the binary refrigeration unit which has two refrigeration cycles.

According to such a configuration, the liquid medium can be rapidly cooled to a very low temperature by the dual refrigeration cycle.
A test apparatus for a secondary battery according to an eleventh aspect of the present invention is a test apparatus for testing a secondary battery that is a sample, and includes a test tank that houses the secondary battery, and an abnormality of the secondary battery. An abnormality detection unit for detecting, a liquid medium cooling unit for cooling a liquid medium for cooling the secondary battery, and a liquid medium supply for injecting the liquid medium cooled by the liquid medium cooling unit to the secondary battery And a control unit that controls the liquid medium supply unit to cool the secondary battery by injecting the liquid medium to the secondary battery when the abnormality detection unit detects an abnormality of the secondary battery. And a placement part on which the secondary battery is placed inside the test tank, wherein the placement part includes a bottom wall on which the secondary battery is placed and a periphery of the secondary battery. The said sprayed into the said secondary battery by the said liquid-medium supply part with the said bottom wall by covering Characterized in that it has a peripheral wall to form a space capable of storing a medium.
According to this configuration, when the abnormality detection unit detects an abnormality in the secondary battery, the control unit controls the liquid medium supply unit to cool the secondary battery by injecting the liquid medium to the secondary battery. . When the liquid medium is ejected to the secondary battery placed on the bottom wall of the placing portion, the secondary battery is cooled by hitting the ejected liquid medium. Since the liquid medium after injection is stored in the space formed by the bottom wall and the peripheral wall of the mounting portion on which the secondary battery is mounted, the secondary battery is stored in the liquid medium stored in the space portion. It is further cooled by soaking.
A test apparatus for a secondary battery according to a twelfth aspect of the present invention is a test apparatus for testing a secondary battery that is a sample, a test tank that houses the secondary battery, and an abnormality of the secondary battery. An abnormality detection unit for detecting, a liquid medium cooling unit for cooling a liquid medium for cooling the secondary battery, and a liquid medium for sending out the liquid medium cooled by the liquid medium cooling unit toward the secondary battery When the supply unit, the abnormality detection unit detects an abnormality of the secondary battery, a control unit that controls the liquid medium supply unit to send out the liquid medium toward the secondary battery, and an inside of the test tank A mounting portion on which the secondary battery is mounted, and the mounting portion includes a bottom wall on which the secondary battery is mounted and the bottom wall by covering the periphery of the secondary battery. The liquid medium sent out toward the secondary battery by the liquid medium supply unit can be stored. Characterized in that it has a peripheral wall to form a space portion.
According to this configuration, when the abnormality detection unit detects an abnormality in the secondary battery, the control unit controls the liquid medium supply unit so as to send the liquid medium toward the secondary battery. The liquid medium sent out toward the secondary battery is sequentially stored in a space formed by the bottom wall and the peripheral wall of the mounting part on which the secondary battery is mounted. The secondary battery is cooled by being immersed in the liquid medium stored in the space.

  As described above, according to the secondary battery test apparatus of the present invention, the secondary battery can be rapidly cooled when an abnormality occurs in the secondary battery as a sample. As a result, ignition and explosion of the secondary battery can be prevented.

1 is a system configuration diagram schematically illustrating a configuration of a test apparatus for a secondary battery according to a first embodiment of the present invention. It is a flowchart which shows the procedure of the cooling method of a secondary battery at the time of testing using the testing apparatus of FIG. It is a graph which shows the change of the battery temperature which shows the two-stage abnormality detection in the procedure of the cooling method of FIG. It is explanatory drawing which shows the operation | movement which cools the liquid medium in the test apparatus of FIG. It is explanatory drawing which shows the operation | movement which injects the liquid medium in the testing apparatus of FIG. It is a system block diagram of the test apparatus which has the binary refrigeration unit which shows the modification of the 1st Embodiment of this invention. It is a system block diagram of the test apparatus which pumps a liquid medium in the space part of the mounting part in which the secondary battery which shows the other modification of the 1st Embodiment of this invention was accommodated. It is a system block diagram of the test apparatus which injects a liquid medium in the space part of the mounting part in which the secondary battery which shows the further another modification of the 1st Embodiment of this invention was accommodated. It is a system block diagram which shows simply the structure of the test apparatus of the secondary battery which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the procedure of the cooling method of a secondary battery at the time of testing using the test apparatus of FIG. It is explanatory drawing which shows the operation | movement which cools the liquid medium in the test apparatus of FIG. It is explanatory drawing which shows the operation | movement which moves the secondary battery in the test apparatus of FIG. 9 to a liquid-medium storage part. It is a system block diagram of the test apparatus which has the binary refrigeration unit which shows the modification of the 2nd Embodiment of this invention.

  Hereinafter, embodiments of a test apparatus for a secondary battery of the present invention will be described in more detail with reference to the drawings.

  Hereinafter, embodiments of a test apparatus for a secondary battery of the present invention will be described in more detail with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the test apparatus 1 is a test apparatus that performs various tests (for example, a safety test and a charge / discharge test) of a secondary battery 100 that is a sample. The test apparatus 1 according to the first embodiment of the present invention is configured to cool the secondary battery 100 by injecting the liquid medium after cooling the liquid medium L when the abnormality of the secondary battery 100 occurs. Has been.

  That is, the test apparatus 1 supplies test power to the test tank 2 that houses the secondary battery 100, the placement unit 8 on which the secondary battery 100 is placed inside the test tank 2, and the secondary battery 100. Power supply 3 that performs abnormality detection unit 4 that detects abnormality of secondary battery 100, liquid medium storage unit 5 that stores liquid medium L for cooling secondary battery 100, and liquid medium that cools liquid medium L A cooling unit 6, a liquid medium supply unit 7 that supplies the liquid medium L to the secondary battery 100, and a control unit 9 that controls the liquid medium cooling unit 6 and the liquid medium supply unit 7 are provided. The liquid medium supply unit 7 cools the secondary battery 100 using the liquid medium L cooled by the liquid medium cooling unit 6, and functions as the secondary battery cooling unit of the present invention.

  The test tank 2 is a housing having an internal space 2a. The temperature and humidity in the internal space 2a are adjusted by a temperature / humidity adjusting unit (not shown).

  The placement unit 8 includes a bottom wall 8a on which the secondary battery 100 is placed and a peripheral wall 8b. The peripheral wall 8 b is erected on the outer peripheral end of the bottom wall 8 a and covers the periphery of the secondary battery 100. A space 8c opened upward is formed by the bottom wall 8a and the peripheral wall 8b. The secondary battery 100 is disposed inside the space 8c. The placement portion 8 is accommodated in the internal space 2 a of the test tank 2.

  The placement unit 8 only needs to be housed in a stable state inside the test tank 2. For example, a leg 8 d is provided on the placement unit 8 and the placement unit 8 is placed on the bottom surface of the test tank 2. It may be. Alternatively, the placement unit 8 may be supported inside the test tank 2 by other means.

  The height of the peripheral wall 8b is set to be higher than the height of the secondary battery 100 placed on the bottom wall 8a. Thereby, when the liquid medium L is stored in the space portion 8c surrounded by the peripheral wall 8b, the secondary battery 100 is totally immersed in the liquid medium L, so that the cooling effect is high.

  The abnormality detection unit 4 has a configuration for detecting an abnormality in the secondary battery 100. In the present embodiment, the abnormality detection unit 4 includes a temperature measurement unit 4a that measures the temperature of the secondary battery 100, and the temperature measurement unit 4a. And a determination unit 4b that determines each of the two-stage abnormalities based on the measured temperature of the secondary battery 100. The temperature measurement unit 4 a is made of a thermocouple or the like, and is attached to the surface of the secondary battery 100 to measure the surface temperature of the secondary battery 100.

The abnormality detection unit 4 detects a first-stage abnormality when the temperature of the secondary battery 100 reaches the first abnormality reference value, and the temperature of the secondary battery 100 is higher than the first abnormality reference value. When the abnormality reference value is reached, it is detected as the abnormality in the second stage. That is, as shown in the graph of FIG. 3, during the test of the secondary battery 100, the abnormality detection unit 4 of the surface temperature of the secondary battery 100 by a temperature measuring unit 4a, i.e., monitoring the battery temperature theta _B. When the battery temperature θ _B reaches the first abnormality reference value θ _A1 , the abnormality detection unit 4 can detect the abnormality of the first stage by determining that the abnormality of the first stage has occurred by the determination unit 4b. It is. Further, when the battery temperature θ _B reaches the second abnormality reference value θ _A2 that is higher than the first abnormality reference value θ _A1 , the determination unit 4b determines that a second-stage abnormality has occurred, thereby detecting the abnormality detection unit. 4 is capable of detecting the second stage abnormality.

Here, the first abnormality reference value θ _A1 is set to, for example, a temperature before entering the dangerous temperature region where the secondary battery 100 may ignite or explode.

Further, the second abnormality reference value θ _A2 is set to, for example, an irreversible temperature at which it is inevitable that the secondary battery 100 ignites or explodes immediately before it ignites or explodes.

  The control unit 9 controls at least the liquid medium supply unit 7. When the abnormality detection unit 4 detects an abnormality of the secondary battery 100, the control unit 9 sets the liquid medium supply unit 7 to cool the secondary battery 100 using the liquid medium L cooled by the liquid medium cooling unit 6. Control.

  Specifically, the control unit 9 controls the liquid medium cooling unit 6 so as to cool the liquid medium L based on the abnormality detection at the first stage of the secondary battery 100 by the abnormality detection unit 4, and detects the abnormality detection. Based on the second stage abnormality detection of the secondary battery 100 by the unit 4, the liquid medium supply unit 7 (that is, the secondary battery cooling unit) is controlled to cool the secondary battery 100 using the liquid medium L. . On the other hand, when the abnormality detection unit 4 does not detect the second-stage abnormality of the secondary battery 100, the control unit 9 stands by without performing control on the liquid medium supply unit 7.

  The liquid medium storage unit 5 includes a container or a tank that stores the liquid medium L. For example, the liquid medium storage unit 5 is disposed on the test tank 2 as illustrated in FIG. 1, but may be disposed at another location.

  As the liquid medium L, a material that maintains a liquid state from normal temperature (about 20 ° C.) to an extremely low temperature of −30 to 60 ° C. is adopted. For example, a fluorine-based inert liquid, specifically, Galden (Registered trademark), Fluorinert (registered trademark), etc. are adopted.

  The liquid medium cooling unit 6 is configured to cool the liquid medium L to −30 to −60 ° C. Specifically, the liquid medium cooling unit 6 includes a tank 6a in which a cooling fluid for cooling the liquid medium L is stored, a heat exchanger 6b, and an electromagnetic valve 6c.

  The heat exchanger 6 b is disposed at such a height that the heat exchanger 6 b is totally immersed in the liquid medium L inside the liquid medium storage unit 5.

  The heat exchanger 6b is formed by bending a tube made of a material having good thermal conductivity such as copper into a spiral shape or a zigzag shape. One end of the heat exchanger 6 b is connected to the tank 6 a via the electromagnetic valve 6 c and piping, and the other end is exposed to the outside of the liquid medium storage unit 5.

  The heat exchanger 6b performs heat exchange between the liquid medium L contacting the outside and the cooling fluid when the cooling fluid sent from the tank 6a passes through the heat exchanger 6b.

  The cooling fluid is a cryogenic fluid for cooling the liquid medium L to −30 to −60 ° C., and for example, liquefied gas is used. As the liquefied gas, for example, liquid carbon dioxide or liquid nitrogen is used.

  The electromagnetic valve 6 c is controlled to open and close by the control unit 9. Specifically, the electromagnetic valve 6c is closed in a normal state, and is controlled to be opened by the control unit 9 when the abnormality detection unit 4 detects a first-stage abnormality. Thereby, the cooling fluid inside the tank 6a is introduced into the heat exchanger 6b through the electromagnetic valve 6c, and exchanges heat with the liquid medium L inside the liquid medium reservoir 5 in the heat exchanger 6b. As a result, the liquid medium L is cooled.

  The liquid medium supply unit 7 supplies the liquid medium L to the secondary battery 100. Specifically, the liquid medium supply unit 7 includes a nozzle 7a and a compressor 7b. The nozzle 7 a is attached to the top wall of the test tank 2 in the internal space 2 a of the test tank 2 and communicates with the liquid medium storage unit 5. The nozzle 7a has an on-off valve (not shown) inside. The on-off valve of the nozzle 7a is closed in a normal state, and can be opened only when injecting. The compressor 7 b sends compressed air into the liquid medium storage unit 5. Due to the pressure of the compressed air, the liquid medium L in the liquid medium reservoir 5 is injected from the nozzle 7a to the secondary battery 100 in the internal space 2a of the test tank 2.

  The nozzle 7 a and the compressor 7 b are controlled by the control unit 9. Specifically, the on-off valve inside the nozzle 7a is closed in a normal state, and is controlled to be opened by the control unit 9 when the abnormality detection unit 4 detects a second-stage abnormality. Further, the compressor 7b is stopped in a normal state, and when the abnormality detection unit 4 detects a second stage abnormality, the compressor 7b is controlled by the control unit 9 so as to send compressed air into the liquid medium storage unit 5. As a result, the liquid medium L inside the liquid medium reservoir 5 is ejected from the nozzle 7a.

  When the test of the secondary battery 100 is performed using the test apparatus 1 configured as described above, when an abnormality occurs in the secondary battery 100, the liquid medium L is injected after being cooled.

  Specifically, the secondary battery 100 is cooled by injecting the liquid medium L in the procedure of the flowchart of FIG.

First, the test of the secondary battery 100 is started in step S1. At this time, the temperature measurement unit 4a of the abnormality detection unit 4 starts monitoring the surface temperature of the secondary battery 100, that is, the battery temperature θ _B (see FIG. 3), and continues monitoring until the end of the test. At the start of the test (at time t0 in FIG. 3), the temperature θ _{L of the} liquid medium _L is normal temperature (about 20 ° C.).

Then, as shown in step S2, it determines the determination unit 4b of the battery temperature theta _B whether the abnormality detection unit 4 has reached the first abnormality reference value theta _A1.

When the determination unit 4b determines that the battery temperature θ _B has reached the first abnormality reference value θ _A1 (see FIG. 3) (at time t1 shown in FIG. 3), in step S3, the control unit 9 The liquid medium cooling unit 6 is controlled to cool the liquid medium L. Specifically, the control unit 9 controls the electromagnetic valve 6 c of the liquid medium cooling unit 6 to open the electromagnetic valve 6 c. As a result, the cooling fluid such as liquid nitrogen inside the tank 6a is introduced into the heat exchanger 6b through the electromagnetic valve 6c as shown in FIG. 4, and the inside of the liquid medium reservoir 5 in the heat exchanger 6b. Heat exchange with the liquid medium L is performed. As a result, the liquid medium L is cooled to an extremely low temperature of −30 ° C.

Thereafter, when the battery temperature θ _B rises without the abnormality of the secondary battery 100 being resolved, the battery temperature θ _B reaches the second abnormality reference value θ _A2 (see FIG. 3) (shown in FIG. 3). At time t2, the determination unit 4b determines that the battery temperature θ _B has reached the second abnormality reference value θ _A2 (see FIG. 3) (step S4). In this case, in step S <b> 5, the control unit 9 controls the liquid medium supply unit 7 to inject the liquid medium L inside the liquid medium storage unit 5 to the secondary battery 100. Specifically, the control unit 9 controls the nozzle 7a of the liquid medium supply unit 7 so as to open an on-off valve inside the nozzle 7a, and further compresses compressed air inside the liquid medium storage unit 5 with respect to the compressor 7b. Control to send in. Thereby, as shown in FIG. 5, the liquid medium L inside the liquid medium storage unit 5 is sprayed from the nozzle 7a into the internal space 2a of the test tank 2 to rapidly cool the secondary battery 100. The liquid medium L is stored in the space portion 8c of the placement portion 8 on which the secondary battery 100 is placed. The secondary battery 100 is cooled more rapidly by being totally immersed in the liquid medium L stored in the space 8c.

On the other hand, when the battery temperature θ _B has not reached the second abnormality reference value θ _A2 , the determination unit 4b determines that the battery temperature θ _B has not reached the second abnormality reference value θ _A2 (Step S4). In the case of S4 NO). In this case, since the control unit 9 stands by without performing control on the liquid medium supply unit 7, the liquid medium L is not ejected by the liquid medium supply unit 7.

  After completing the injection of the liquid medium L, the test apparatus 1 forcibly ends the test of the secondary battery 100 as in step S6 and ends all operations.

(Characteristics of the first embodiment)
(1)
In the test apparatus 1 according to the first embodiment, when the abnormality detection unit 4 detects an abnormality of the secondary battery 100, the control unit 9 uses the liquid medium L cooled by the liquid medium cooling unit 6 to change the secondary battery 100. The liquid medium supply unit 7 (secondary battery cooling unit) is controlled to cool.

  Therefore, when an abnormality such as a rapid rise in the temperature of the secondary battery 100 as a sample occurs during the test, the abnormality detection unit 4 detects the abnormality. At that time, the liquid medium supply unit 7 cools the secondary battery 100 by supplying the liquid medium L cooled by the liquid medium cooling unit 6 to the secondary battery 100. Thereby, the secondary battery 100 can be rapidly cooled using the cooled liquid medium L. As a result, ignition and explosion of the secondary battery 100 can be prevented.

(2)
In the test apparatus 1 of the first embodiment, the control unit 9 controls the liquid medium cooling unit 6 so as to cool the liquid medium L based on the first-stage abnormality detection of the secondary battery 100 by the abnormality detection unit 4. Then, based on the second-stage abnormality detection of the secondary battery 100 by the abnormality detection unit 4, the liquid medium supply unit 7 is configured to cool the secondary battery 100 by injecting the liquid medium L to the secondary battery 100. (That is, the secondary battery cooling unit) is controlled.

  Therefore, when an abnormality such as a rapid rise in the temperature of the secondary battery 100 as a sample occurs during the test, first, when the abnormality in the first stage is detected by the abnormality detection unit 4, the secondary battery 100 is removed. The liquid medium for cooling is cooled by the liquid medium cooling unit 6, and then when the second stage abnormality is detected, the cooled liquid medium is supplied to the secondary battery 100 by the liquid medium supply unit 7. Is done. Therefore, it is possible to rapidly cool the secondary battery 100 using the cooled liquid medium. Thereby, it becomes possible to prevent ignition and explosion of the secondary battery 100.

  In addition, the liquid medium L injected into the test tank 2 by the liquid medium supply unit 7 is less likely to adhere in the test tank 2 as compared to a fire extinguishing agent such as powder, and thus can be easily wiped off. It becomes possible to resume at an early stage.

  On the other hand, if the abnormality in the first stage does not occur and the abnormality in the second stage does not occur, the standby is performed without supplying the liquid medium L to the secondary battery 100, so the frequency of supplying the liquid medium L is suppressed. It becomes possible. As a result, the number of times that the test of the secondary battery 100 is interrupted can be reduced.

(3)
In the test apparatus 1 of the first embodiment, the placement unit 8 forms the space 8c together with the bottom wall 8a by covering the bottom wall 8a on which the secondary battery 100 is placed and the periphery of the secondary battery 100. And a peripheral wall 8b. Therefore, when the liquid medium L is supplied to the secondary battery 100 mounted on the bottom wall 8a of the mounting portion 8, the liquid medium is stored in the space portion 8c surrounded by the bottom wall 8a and the peripheral wall 8b. It is done. The secondary battery 100 is immersed in the liquid medium stored in the space 8c. Thereby, it is possible to cool the secondary battery 100 more rapidly.

  In the first embodiment, the height of the peripheral wall 8b is set to be higher than the height of the secondary battery 100 placed on the bottom wall 8a. Since the entire battery 8 is immersed in the liquid medium stored in the portion 8c, the secondary battery 100 can be cooled more rapidly. In addition, since the test apparatus 1 according to the first embodiment has a configuration in which the liquid medium is stored inside the space portion 8 c of the mounting portion 8, the liquid medium is unlikely to adhere to the inner wall of the test tank 2.

(4)
In the test apparatus 1 of the first embodiment, the abnormality detection unit 4 includes a temperature measurement unit 4 a that measures the temperature of the secondary battery 100. Abnormality detection unit 4, the temperature of the secondary battery 100, i.e., detects an abnormality by the battery temperature theta _B. That is, the abnormality detection unit 4 detects the abnormality of the first stage when the battery temperature theta _B has reached the first abnormality reference value theta _A1, the battery temperature theta _B higher than the first abnormal reference value theta _A1 When the second abnormality reference value θ _A2 is reached, a second-stage abnormality is detected. Thus, according to increase the battery temperature theta _B, after the operation of cooling the liquid medium L by a liquid medium cooling section 6, the cooled liquid medium L secondary battery 100 rapidly using It is possible to cool.

(5)
In the test apparatus 1 of the first embodiment, the liquid medium cooling unit 6 cools the liquid medium L to an extremely low temperature of −30 to −60 ° C., and thus the secondary battery is used using the liquid medium L cooled to the extremely low temperature. It is possible to cool 100 rapidly.

(6)
In the test apparatus 1 of the first embodiment, the liquid medium cooling unit 6 includes a heat exchanger 6b that performs heat exchange between the liquid medium L and a cooling fluid that cools the liquid medium L. Therefore, by performing heat exchange between the liquid medium L and a cooling fluid such as liquid nitrogen via the heat exchanger 6b, the liquid medium L can be rapidly cooled to an extremely low temperature of −30 ° C. or lower. is there.

(7)
In the test apparatus 1 of the first embodiment, since a liquefied gas is used as a cooling fluid, heat exchange is performed between the liquid medium L and a liquefied gas such as liquid nitrogen so that the liquid medium L is −30 ° C. or lower. It is possible to cool rapidly to very low temperatures.

(Modification of the first embodiment)
(A)
In the test apparatus 1 of the first embodiment, the abnormality detection unit 4 detects abnormality of the secondary battery 100 in two stages, and the control unit 9 detects the abnormality in the first stage when the liquid medium cooling unit 6 is detected. The liquid medium L is controlled to be cooled, and the liquid medium L is controlled to be supplied to the liquid medium supply unit 7 when an abnormality in the second stage is detected. However, the present invention is not limited to this. As a modification of the present invention, when the abnormality detection unit 4 detects an abnormality of the secondary battery 100 once, the control unit 9 controls the liquid medium cooling unit 6 to cool the liquid medium L, and then Subsequently, a series of controls may be executed by controlling the liquid medium supply unit 7 to supply the liquid medium L.

  Alternatively, the liquid medium cooling unit 6 may cool the liquid medium L in advance before the abnormality detection unit 4 detects the abnormality.

(B)
In the test apparatus 1 of the first embodiment, the abnormality detection unit 4 detects an abnormality of the secondary battery 100 based on the temperature of the secondary battery. However, the present invention is not limited to this, and the abnormality detection unit. May detect abnormality of the secondary battery by detection by a method other than the temperature of the secondary battery, for example, detection of change in impedance of the secondary battery.

(C)
In the test apparatus 1 of the first embodiment, the liquid medium cooling unit 6 has a configuration in which the liquid medium L is cooled by exchanging heat between the cooling fluid such as liquefied gas and the liquid medium L. The invention is not limited to this, and various refrigerators or refrigeration means may be employed as long as the liquid medium L can be cooled. For example, a binary refrigeration unit having two refrigeration cycles 12 and 13 may be adopted as the liquid medium cooling unit 11 as in the modification shown in FIG.

  Specifically, the liquid medium cooling unit 11 illustrated in FIG. 6 includes a low temperature side refrigeration cycle 12 and a high temperature side refrigeration cycle 13.

  The low temperature side refrigeration cycle 12 has a low temperature side evaporator 12a, a low temperature side condenser 12b, a compressor 12c, and an expansion valve 12d, and these are sequentially connected by piping so that the low temperature side refrigerant circulates. A closed refrigerant circuit is formed. The low temperature side evaporator 12 a is disposed at a position where the liquid medium L is entirely immersed in the liquid medium L inside the liquid medium storage unit 5.

  On the other hand, the high temperature side refrigeration cycle 13 includes a high temperature side condenser 13a, a high temperature side evaporator 13b, a compressor 13c, and an expansion valve 13d. A closed refrigerant circuit is formed in which is circulated. The high temperature side condenser 13a performs heat exchange between the high temperature side refrigerant and air or water introduced from the outside. The high temperature side evaporator 13b performs heat exchange with the low temperature side condenser 12b.

  In the liquid medium cooling unit 11 including such a dual refrigeration cycle unit, first, in the high temperature side refrigeration cycle 13, the high temperature side refrigerant compressed by the compressor 13c is transferred to the outside air or water by the high temperature side condenser 13a. Then, it is cooled and condensed, and then expanded by the expansion valve 13d. Thereafter, the expanded high temperature side refrigerant absorbs heat from the low temperature side condenser 12b and evaporates in the high temperature side evaporator 13b. Thereby, the low temperature side refrigerant | coolant inside the low temperature side condenser 12b is cooled and condensed. In the low temperature side refrigeration cycle 12, the low temperature side refrigerant cooled and condensed by the low temperature side condenser 12b is expanded by the expansion valve 12d and then sent to the low temperature side evaporator 12a. In the low temperature side evaporator 12 a, the low temperature side refrigerant absorbs the heat of the liquid medium L inside the liquid medium storage unit 5 and evaporates. Thereby, the liquid medium L is rapidly cooled to an extremely low temperature of −30 ° C. or less by exchanging heat with the low-temperature side refrigerant.

  As described above, in the modification shown in FIG. 6, the liquid medium cooling unit 11 is a binary refrigeration unit having two refrigeration cycles. It is possible to cool rapidly to low temperatures.

(D)
In the said 1st Embodiment, although the liquid-medium supply part 7 has the structure which injects the liquid medium L to the secondary battery 100 from the nozzle 7a attached to the top wall of the test tank 2, this invention is this. It is not limited to. As another modification of the first embodiment form state, for example, as shown in FIG. 7, the liquid medium supply unit 14, the part 8 placing a liquid medium L stored in the liquid medium reservoir 5 by the pump 15 You may have the structure which pumps the liquid medium L inside the space part 8c. That is, the liquid medium supply unit 14 in FIG. 7 includes a pump 15 and a communication pipe 16 that communicates the liquid medium storage unit 5 and the space 8 c of the mounting unit 8. The pump 15 is provided in the middle of the communication pipe 16.

  In the configuration shown in FIG. 7, when the abnormality detection unit 4 detects the first abnormality of the secondary battery 100, the control unit 9 controls the liquid medium cooling unit 6 as in the first embodiment. Control is performed to cool the liquid medium L in the liquid medium storage unit 5.

  When the abnormality detection unit 4 detects the second abnormality of the secondary battery 100, the control unit 9 sends the liquid medium L stored in the liquid medium storage unit 5 to the pump 15. Control is performed so as to pump into the space 8c. Thereby, the liquid medium L is filled in the space 8c. As a result, the secondary battery 100 inside the space 8c is rapidly cooled by the liquid medium L.

(E)
As a first further modification, as shown in FIG. 8, the liquid medium supply unit 18 has a configuration in which the liquid medium L is injected from the nozzle 17 toward the secondary battery 100 by the pump 15. May be. That is, the liquid medium supply unit 18 includes a pump 15, a communication pipe 16, and a nozzle 17 provided at the downstream end of the communication pipe 16. The nozzle 17 is disposed obliquely above the secondary battery 100 in the internal space 2 a of the test tank 2, and the injection port of the nozzle 17 is directed to the secondary battery 100.

  Also in this case, when the abnormality detection unit 4 detects the second abnormality of the secondary battery 100, the control unit 9 sends the liquid medium L stored in the liquid medium storage unit 5 to the pump 15 from the nozzle 17. Control to inject. Thereby, the liquid medium L cooled by the liquid medium cooling unit 6 at the time of the first abnormality detection is jetted from the nozzle 17 to the secondary battery 100 to cool the secondary battery 100. At the same time, the secondary battery 100 is cooled by being immersed in the liquid medium L stored in the space portion 8 c of the placement portion 8. As a result, the secondary battery 100 is rapidly cooled by the liquid medium L.

(Second Embodiment)
As shown in FIG. 1, the test apparatus 1 of the first embodiment cools the liquid medium L and then cools the secondary battery 100 by injecting the liquid medium when the abnormality occurs in the secondary battery 100. However, the present invention is not limited to this. For example, as another embodiment of the present invention, like the test apparatus 31 shown in FIG. 9, after the liquid medium L is cooled, the secondary battery 100 is moved to the liquid medium storage unit 35 and the secondary battery 100 is moved. You may have the structure immersed in a liquid medium.

  That is, the test apparatus 31 shown in FIG. 9 includes a test tank 32 that houses the secondary battery 100, a liquid medium storage unit 35 that stores the liquid medium L for cooling the secondary battery 100, and the secondary battery 100. And a moving part 37 for moving the liquid to the liquid medium storing part 35.

  The test apparatus 31 includes a power supply 3, an abnormality detection unit 4, and a liquid medium cooling unit 6 as in the test apparatus 1 (see FIG. 1) of the first embodiment. Since it has the same structure as the power supply 3, the abnormality detection part 4, and the liquid medium cooling part 6, description is abbreviate | omitted here.

  Further, the test apparatus 31 includes a control unit 9 that controls the liquid medium cooling unit 6 and the moving unit 37.

  The test tank 32 shown in FIG. 9 is a case opened downward. That is, the test tank 32 has an internal space 32a and a lower opening 32b communicating with the internal space 32a.

  The liquid medium storage unit 35 is configured by a container or tank that stores the liquid medium L, and is open upward. The liquid medium reservoir 35 is connected to the lower end of the test tank 32 so as to communicate with the internal space 32 a of the test tank 32. A liquid medium L similar to that in the first embodiment is stored in the liquid medium storage unit 35. The liquid medium L is cooled by the liquid medium cooling unit 6 while being stored in the liquid medium storage unit 35.

  The moving unit 37 moves the secondary battery 100 accommodated in the test tank 32 to the liquid medium storing unit 35 disposed below the test tank 32, thereby storing the liquid medium stored in the liquid medium storing unit 35. The secondary battery 100 is cooled using L, and functions as a secondary battery cooling unit of the present invention. Specifically, the moving unit 37 includes a mounting unit 37a on which the secondary battery 100 is mounted, a support unit 37b that supports the mounting unit 37a, and the support unit 37b at the upper end position (see FIG. 9). And a drive unit 37c that moves in the vertical direction between the lower end position (see FIG. 12).

  The mounting portion 37a and the support portion 37b have dimensions and shapes that can close the lower opening 32b of the test chamber 32 by these.

  When the placement portion 37 a and the support portion 37 b are at the upper end position shown in FIG. 9, the secondary battery 100 is accommodated in the internal space 32 a of the test tank 32. At the same time, the placement portion 37 a and the support portion 37 b close the lower opening 32 b of the test tank 32. When the placement part 37a and the support part 37b are at the lower end position shown in FIG. 12, the secondary battery 100 placed on the placement part 37a is entirely submerged in the liquid medium L inside the liquid medium storage part 35. It is done.

  The drive unit 37c may have any configuration as long as the support unit 37b can be moved, and may include, for example, an air cylinder or a hydraulic cylinder.

  The control unit 9 controls at least the moving unit 37. When the abnormality detection unit 4 detects the abnormality of the secondary battery 100, the control unit 9 cools the secondary battery 100 with respect to the moving unit 37 using the liquid medium L cooled by the liquid medium cooling unit 6. To control.

  Specifically, the control unit 9 controls the liquid medium cooling unit 6 to cool the liquid medium L when the abnormality detection unit 4 detects the first stage abnormality of the secondary battery 100, and Thereafter, when the abnormality detection unit 4 detects a second-stage abnormality of the secondary battery 100, the secondary battery 100 is moved to the liquid medium storage unit 35 with respect to the moving unit 37, and the secondary battery 100 is liquidated. Control is performed so as to cool by submerging in the medium L. On the other hand, when the abnormality detection unit 4 does not detect the second-stage abnormality of the secondary battery 100, the control unit 9 stands by without performing control on the moving unit 37.

  When the test of the secondary battery 100 is performed using the test apparatus 31 configured as described above, when an abnormality occurs in the secondary battery 100, the liquid medium L is cooled and then the secondary battery 100 is liquidated. The secondary battery 100 is submerged in the liquid medium by moving to the medium storage unit 35.

  Specifically, the secondary battery 100 is submerged in the liquid medium L and cooled by the procedure of the flowchart of FIG.

First, the test of the secondary battery 100 is started in step S11. At the start of the test, the placement portion 37a and the support portion 37b of the moving portion 37 are disposed at the upper end position shown in FIG. 9, and the secondary battery 100 on the placement portion 37a is accommodated in the test tank 32. When the test is started, the temperature measurement unit 4a of the abnormality detection unit 4 starts monitoring the surface temperature of the secondary battery 100, that is, the battery temperature θ _B (see FIG. 3), as in the first embodiment. Continue monitoring until the end. Then, as shown in step S12, it determines in the determination unit 4b of the battery temperature theta _B whether the abnormality detection unit 4 has reached the first abnormality reference value theta _A1.

When the determination unit 4b determines that the battery temperature θ _B has reached the first abnormality reference value θ _A1 (see FIG. 3) (at time t1 shown in FIG. 3), the same as in the first embodiment. In Step S <b> 13, the control unit 9 controls the liquid medium cooling unit 6 to cool the liquid medium L. Specifically, the control unit 9 controls the electromagnetic valve 6 c of the liquid medium cooling unit 6 to open the electromagnetic valve 6 c. As a result, the cooling fluid such as liquid nitrogen inside the tank 6a is introduced into the heat exchanger 6b through the electromagnetic valve 6c as shown in FIG. 11, and the inside of the liquid medium reservoir 35 in the heat exchanger 6b. Heat exchange with the liquid medium L is performed. As a result, the liquid medium L is cooled to an extremely low temperature of −30 ° C. The liquid medium L cooled by the liquid medium cooling unit 6 is maintained in a state of being stored in the liquid medium storage unit 35.

Thereafter, when the battery temperature θ _B rises without the abnormality of the secondary battery 100 being resolved, the battery temperature θ _B reaches the second abnormality reference value θ _A2 (see FIG. 3) (shown in FIG. 3). At time t2, similarly to the first embodiment, the determination unit 4b determines that the battery temperature θ _B has reached the second abnormality reference value θ _A2 (see FIG. 3) (step S14). .

  In this case, in step S <b> 15, the control unit 9 controls the moving unit 37 to move the secondary battery 100 to the liquid medium storage unit 35. Specifically, the control unit 9 controls the drive unit 37c to lower the support unit 37b. Thereby, as shown in FIG. 12, the secondary battery 100 is cooled in the liquid medium storage unit 35 together with the mounting unit 37a and the support unit 37b while being mounted on the mounting unit 37a. Sunk. Thereby, the secondary battery 100 is rapidly cooled by being totally immersed in the liquid medium L stored in the liquid medium storage part 35.

On the other hand, when the battery temperature θ _B has not reached the second abnormality reference value θ _A2 , the determination unit 4b determines that the battery temperature θ _B has not reached the second abnormality reference value θ _A2 (Step S4). In the case of S14 NO). In this case, since the control unit 9 stands by without performing control on the moving unit 37, the movement of the secondary battery 100 by the moving unit 37 is not performed.

  After the movement of the secondary battery 100 is completed, the test apparatus 31 forcibly ends the test of the secondary battery 100 as in step S16 and ends all operations.

(Characteristics of the second embodiment)
(1)
In the test apparatus 31 of the second embodiment, when the abnormality detection unit 4 detects an abnormality of the secondary battery 100, the control unit 9 uses the liquid medium L cooled by the liquid medium cooling unit 6 to change the secondary battery 100. The moving unit 37 (secondary battery cooling unit) is controlled to cool.

  Therefore, when an abnormality such as a rapid rise in the temperature of the secondary battery 100 as a sample occurs during the test, the abnormality detection unit 4 detects the abnormality. At that time, the moving unit 37 cools the secondary battery 100 by sinking the secondary battery 100 in the liquid medium L cooled by the liquid medium cooling unit 6. Thereby, the secondary battery 100 can be rapidly cooled using the cooled liquid medium L. As a result, ignition and explosion of the secondary battery 100 can be prevented.

(2)
In the test apparatus 31 of the second embodiment, the control unit 9 controls the liquid medium cooling unit 6 so as to cool the liquid medium L based on the first-stage abnormality detection of the secondary battery 100 by the abnormality detection unit 4. The secondary battery 100 is moved to the liquid medium storage unit 35 by moving the secondary battery 100 to the liquid medium storage unit 35 based on the second stage abnormality detection of the secondary battery 100 by the abnormality detection unit 4. The moving unit 37 (that is, the secondary battery cooling unit) is controlled to be cooled by the liquid medium L. Therefore, when an abnormality such as a rapid increase in the temperature of the secondary battery 100 as a sample occurs during the test, first, when the abnormality in the first stage is detected by the abnormality detection unit 4, the secondary battery 100 is detected. When the second stage abnormality is detected, the secondary battery 100 is moved to the liquid medium storage unit 35 by the moving unit 37 and cooled. Submerged in the liquid medium. Therefore, it is possible to rapidly cool the secondary battery 100 using the cooled liquid medium. Thereby, it becomes possible to prevent ignition and explosion of the secondary battery 100.

  In the test apparatus 31 of the second embodiment, since the secondary battery 100 is moved from the test tank 32 to the liquid medium storage unit 35 and the secondary battery 100 is submerged in the liquid medium L, the test tank 32 is placed in the liquid medium L. Do not touch. Therefore, the test tank 32 can be maintained in the same state as before the secondary battery 100 is cooled, and the test can be restarted at an early stage.

  On the other hand, if the second stage abnormality does not occur even if the first stage abnormality occurs, the secondary battery 100 is kept in a state where it is not submerged in the liquid medium L. Therefore, the secondary battery 100 is submerged in the liquid medium L. The frequency can be suppressed, and as a result, the number of times the test of the secondary battery 100 is interrupted can be reduced.

(Modification of the second embodiment)
(A)
In the test apparatus 31 of the second embodiment described above, the abnormality detection unit 4 detects an abnormality of the secondary battery 100 in two stages, and the control unit 9 detects the abnormality in the first stage when the liquid medium cooling unit 6 is detected. The liquid medium L is controlled to be cooled, and the secondary battery 100 is controlled to move to the liquid medium storage part 35 with respect to the moving part 37 when an abnormality in the second stage is detected. However, the present invention is not limited to this. As a modification of the present invention, when the abnormality detection unit 4 detects an abnormality of the secondary battery 100 once, the control unit 9 controls the liquid medium cooling unit 6 to cool the liquid medium, and thereafter Subsequently, a series of controls may be executed by controlling the moving unit 37 to move the secondary battery 100 to the liquid medium storing unit 35.

  Alternatively, the liquid medium cooling unit 6 may cool the liquid medium L in advance before the abnormality detection unit 4 detects the abnormality.

(B)
In the test apparatus 31 of the second embodiment, the liquid medium cooling unit 6 has a configuration in which the liquid medium L is cooled by exchanging heat between the cooling fluid such as liquefied gas and the liquid medium L. The invention is not limited to this, and like the modified example (C) of the first embodiment (see FIG. 6), as the modified example shown in FIG. A dual refrigeration unit having two refrigeration cycles 42 and 43 may be employed.

  The liquid medium cooling unit 41 shown in FIG. 13 also includes a low temperature side refrigeration cycle 42 and a high temperature side refrigeration cycle 43, similarly to the liquid medium cooling unit 11 of FIG. Specifically, the low temperature side refrigeration cycle 42 includes a low temperature side evaporator 42a, a low temperature side condenser 42b, a compressor 42c, and an expansion valve 42d, which are sequentially connected by piping, A closed refrigerant circuit in which the low temperature side refrigerant circulates is formed. And the high temperature side refrigerating cycle 43 has the high temperature side condenser 43a, the high temperature side evaporator 43b, the compressor 43c, and the expansion valve 43d, and these are sequentially connected by piping, so that the high temperature side refrigerant A closed refrigerant circuit is formed in which is circulated. The high temperature side condenser 43a performs heat exchange between the high temperature side refrigerant and air or water introduced from the outside. The high temperature side evaporator 43b performs heat exchange with the low temperature side condenser 42b.

  In the modification shown in FIG. 13 as well, the liquid medium cooling unit 41 is a dual refrigeration unit having two refrigeration cycles, like the liquid medium cooling unit 11 in FIG. The medium L can be rapidly cooled to an extremely low temperature of −30 ° C. or lower.

(C)
In the test apparatus 31 of the second embodiment, as in the test apparatus 1 of the first embodiment, the abnormality detection unit 4 detects an abnormality of the secondary battery 100 based on the temperature of the secondary battery. However, the abnormality detection unit detects the abnormality of the secondary battery by detecting by a method other than the temperature of the secondary battery, for example, detecting a change in impedance of the secondary battery. Also good.

DESCRIPTION OF SYMBOLS 1, 31 Test apparatus 2 Test tank 4 Abnormality detection part 5, 35 Liquid medium storage part 6 Liquid medium cooling part 7, 37 Liquid medium supply part 9 Control part

Claims (12)

A test apparatus for testing a secondary battery as a sample,
A test chamber containing the secondary battery;
An abnormality detection unit for detecting an abnormality of the secondary battery;
A liquid medium cooling unit for cooling a liquid medium for cooling the secondary battery;
A secondary battery cooling unit that cools the secondary battery using the liquid medium;
Based on the abnormality detection of the secondary battery by the abnormality detection unit, the liquid medium cooling unit is controlled to start cooling the liquid medium, and the liquid medium cooled by the liquid medium cooling unit is A control unit for controlling the secondary battery cooling unit to cool the secondary battery using,
Secondary battery testing equipment. The control unit controls the liquid medium cooling unit to cool the liquid medium based on the first-stage abnormality detection of the secondary battery by the abnormality detection unit, and the secondary detection unit by the abnormality detection unit Based on abnormality detection of the second stage of the battery, the secondary battery cooling unit is controlled to cool the secondary battery using the liquid medium.
The test apparatus for a secondary battery according to claim 1. The abnormality detection unit has a temperature measurement unit that measures the temperature of the secondary battery,
The abnormality detection unit detects the first-stage abnormality when the temperature of the secondary battery reaches a first abnormality reference value, and the temperature of the secondary battery is higher than the first abnormality reference value. 2 When the abnormality standard value is reached, the second stage abnormality is detected.
The test apparatus for a secondary battery according to claim 2. The secondary battery cooling unit is a liquid medium supply unit that cools the secondary battery by supplying the liquid medium cooled by the liquid medium cooling unit to the secondary battery.
The test apparatus for a secondary battery according to claim 1. It further comprises a placement part on which the secondary battery is placed,
The mounting portion includes a bottom wall on which the secondary battery is mounted, and a peripheral wall that forms a space portion together with the bottom wall by covering the periphery of the secondary battery.
The test apparatus for a secondary battery according to claim 4. A liquid medium storing part for storing the liquid medium cooled by the liquid medium cooling part;
The secondary battery cooling unit is a moving unit that cools the secondary battery by moving the secondary battery to the liquid medium storage unit in which the liquid medium is stored.
The test apparatus for a secondary battery according to claim 1. The liquid medium cooling unit cools the liquid medium to −30 to −60 ° C.,
The secondary battery testing apparatus according to claim 1. The liquid medium cooling unit includes a heat exchanger that performs heat exchange between the liquid medium and a cooling fluid that cools the liquid medium.
The secondary battery test apparatus according to claim 1. The cooling fluid is a liquefied gas;
The secondary battery test apparatus according to claim 8. The liquid medium cooling unit includes a dual refrigeration unit having two refrigeration cycles,
The secondary battery testing apparatus according to claim 1.   A test apparatus for testing a secondary battery as a sample,
  A test chamber containing the secondary battery;
  An abnormality detection unit for detecting an abnormality of the secondary battery;
  A liquid medium cooling unit for cooling a liquid medium for cooling the secondary battery;
  A liquid medium supply unit for injecting the liquid medium cooled by the liquid medium cooling unit to the secondary battery;
  When the abnormality detection unit detects an abnormality of the secondary battery, a control unit that controls the liquid medium supply unit to cool the secondary battery by injecting the liquid medium to the secondary battery;
  A mounting portion on which the secondary battery is mounted in the test chamber;
With
  The mounting unit includes a bottom wall on which the secondary battery is mounted, and the liquid medium that is sprayed onto the secondary battery by the liquid medium supply unit together with the bottom wall by covering the periphery of the secondary battery. A peripheral wall that forms a space that can store the
Secondary battery testing equipment.   A test apparatus for testing a secondary battery as a sample,
  A test chamber containing the secondary battery;
  An abnormality detection unit for detecting an abnormality of the secondary battery;
  A liquid medium cooling unit for cooling a liquid medium for cooling the secondary battery;
  A liquid medium supply unit that sends out the liquid medium cooled by the liquid medium cooling unit toward the secondary battery;
  When the abnormality detection unit detects an abnormality of the secondary battery, a control unit that controls the liquid medium supply unit to send the liquid medium toward the secondary battery;
  A mounting portion on which the secondary battery is mounted in the test chamber;
With
  The mounting portion is sent to the secondary battery by the liquid medium supply unit together with the bottom wall by covering the periphery of the secondary battery and the bottom wall on which the secondary battery is placed. A peripheral wall that forms a space capable of storing the liquid medium,
Secondary battery testing equipment.