JP6146356B2 - Excitation device - Google Patents

Description

  The present invention relates to a vibration device that vibrates an assembled battery.

2. Description of the Related Art Conventionally, in an electric vehicle using a motor as a drive source, a battery pack using a lithium ion secondary battery as a battery cell is often used as a traveling battery for supplying power to the motor.
A battery cell of such an assembled battery includes an electrode body including a positive electrode and a negative electrode, an electrolytic solution containing an electrolyte, a container for storing an electrode body impregnated with the electrolytic solution, and the like, and the electrolyte moves between the electrodes. Charging / discharging is performed.
Here, when the electrolyte concentration in the electrolyte solution of the battery cell becomes non-uniform, the surface film formed on the electrode body becomes non-uniform or dendrites are generated, and the performance of the battery cell deteriorates.
In order to avoid such performance degradation of individual battery cells, for example, in Patent Document 1 below, a power generation element including a positive electrode plate, a negative electrode plate, and a separator interposed therebetween, and the power generation element are impregnated, A battery system is disclosed that includes a lithium ion secondary battery having a non-aqueous electrolyte containing a lithium salt, and an electrolyte oscillating means for applying vibration to the electrolyte.
Further, in Patent Document 2 below, a positive electrode and a negative electrode are arranged in a battery tank, and an ultrasonic wave generating vibrator is attached as an electric double layer removing means. A technique is disclosed in which an electric double layer existing at the interface between an electrolyte solution held in a battery tank and a positive electrode and a negative electrode is broken by excitation vibration.

Moreover, the voltage variation between battery cells is mentioned as a cause of the performance fall of the whole assembled battery.
In an assembled battery constituted by a plurality of battery cells, the progress of deterioration of each battery cell is different by repeating charging and discharging, and the discharge characteristics of each battery cell are slightly different.
In order to maximize the performance of each battery cell in such an assembled battery, a cell voltage balance technique for correcting a voltage shift between the battery cells is known.
Specifically, for example, a method of matching the voltage balance in the assembled battery by connecting a resistance to each battery cell and discharging other battery cells in accordance with the battery cell having the lowest voltage is known. (For example, refer to Patent Document 3 below).

JP 2010-251025 A Japanese Patent Laid-Open No. 6-84544 JP 2003-289629 A

In the conventional technology described above, the electrolyte concentration is made uniform by applying vibration to the electrolyte solution in the secondary battery. However, for the generation of vibration, a motor (Patent Document 1), an oscillator (Patent Document 2), etc. A device (vibration generating device) that is driven by using is used.
As power for driving such a vibration generator, power in a lithium ion secondary battery to be vibrated or power from other batteries or the like is used. Here, when the lithium ion secondary battery is used as a traveling battery for an electric vehicle, it is preferable to suppress power consumption other than traveling power as much as possible in order to extend the cruising range.
Moreover, in the voltage balance control of the assembled battery mentioned above, the control which discharges a battery cell with high performance according to a battery cell with low performance is performed. For this reason, there exists a subject that electric power consumption generate | occur | produces in the form different from the purpose for which an assembled battery is originally used.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to suppress deterioration in the performance of an assembled battery while suppressing unnecessary power consumption.

In order to solve the above-described problems and achieve the object, the vibration device according to the invention of claim 1 is a vibration device that vibrates an assembled battery including a plurality of battery cells, and each of the batteries Voltage control target cell selection means for detecting a cell voltage of the cell and selecting a voltage control target cell whose cell voltage is equal to or higher than a predetermined upper limit voltage, and using the electric power stored in the voltage control target cell to the battery cell And an excitation means for applying vibration to the actuator.
In the vibration device according to the second aspect of the present invention, the vibration unit is individually attached to each of the battery cells, and a vibration target cell that selects a vibration target cell to be a vibration target by the vibration unit. And further comprising: a selection means; and an excitation control means for operating the excitation means by supplying the electric power stored in the voltage control object cell to the excitation means attached to the excitation target cell. The vibration target cell selecting means selects a battery cell other than the voltage control target cell as the vibration target cell.
The vibration device according to a third aspect of the invention is characterized in that the vibration target cell selecting means selects, as the vibration target cell, a battery cell whose cell voltage is equal to or lower than a predetermined lower limit voltage.
In the vibration device according to a fourth aspect of the present invention, the battery cell includes an electrode body composed of a positive electrode and a negative electrode, and an electrolyte solution containing an electrolyte and impregnated in the electrode body. An electrode terminal connected to each of the negative electrodes is provided outside the container, and the vibration means vibrates the lower side or bottom of the side surface of the container.
In the vibration device according to the invention of claim 5, the battery cell includes an electrode body composed of a positive electrode and a negative electrode, and an electrolyte solution containing an electrolyte and impregnated in the electrode body, and is stored in a container. Electrode terminals respectively connected to the negative electrode are provided outside the container, and the vibration means vibrates the negative electrode terminal.
The vibration device according to a sixth aspect of the invention is characterized in that the assembled battery includes a plurality of the battery cells stored in a battery case, and the vibration means vibrates the battery case. .

According to the first aspect of the present invention, the excitation means is driven using the power of the voltage control target cell whose cell voltage is equal to or higher than the predetermined upper limit voltage. As a result, when voltage variation occurs in the battery cells in the assembled battery, the power can be used for vibration of the battery cells, rather than consuming electric power simply by discharging, and the power in the battery cells is more effective. Can be used for
According to invention of Claim 2, battery cells other than a voltage control object cell are made into a vibration object cell. The voltage control target cell is a battery cell with relatively high performance that has not deteriorated. By using a battery cell with other deterioration as a vibration target cell, variation in performance between the battery cells is suppressed. The battery performance of the entire assembled battery can be improved.
According to invention of Claim 3, the battery cell whose cell voltage is below a predetermined | prescribed lower limit voltage is selected as a vibration object cell. A battery cell having a relatively low voltage is a battery cell that has been deteriorated, and by selecting and vibrating such a battery cell, the performance variation between the battery cells can be further suppressed.
According to the invention of claim 4, since the lower side or bottom surface of the battery cell container is vibrated by the vibration means, the liquid pool of the electrolyte in the container can be vibrated efficiently, and the electrolyte concentration can be rapidly increased. Can be made even.
According to the invention of claim 5, since the negative electrode terminal of the battery cell is vibrated by the vibration means, it is possible to efficiently suppress the generation of dendrite formed on the negative electrode of the electrode body.
According to the invention of claim 6, since the battery case of the assembled battery is vibrated by the vibration means, not only the specific battery cell but all the battery cells are vibrated, and the performance degradation is suppressed in all the battery cells. I can expect.

It is a block diagram which shows the structure of the vibration apparatus 10 concerning embodiment. It is explanatory drawing which shows the structure of 20 A of battery cells. It is explanatory drawing which shows the structure of 20 A of battery cells. It is explanatory drawing which shows the structure of 20 A of battery cells. It is explanatory drawing which shows the structure of 20 A of battery cells. It is explanatory drawing which shows typically the voltage balance control by the vibration apparatus. FIG. 5 is an explanatory diagram schematically showing a power supply path for the vibration means 106. 3 is a flowchart showing a procedure of processing performed by the vibration device 10. It is explanatory drawing which shows the other example of the attachment position of the vibration means. It is explanatory drawing which shows the other example of the attachment position of the vibration means.

  Exemplary embodiments of a vibration exciter according to the present invention will be explained below in detail with reference to the accompanying drawings. In this embodiment, an example will be described in which the present invention is used as a vibration device that vibrates an assembled battery used as a traveling battery for driving an electric vehicle.

(Embodiment)
FIG. 1 is a block diagram illustrating a configuration of a vibration exciter 10 according to an embodiment.
In the present embodiment, the vibration device 10 is mounted on the electric vehicle 30 and vibrates the traveling battery 20 that stores electric power for driving the electric vehicle 30.
The electric vehicle 30 travels by driving the motor 302 using the electric power stored in the traveling battery 20 and rotating the tire 304. For convenience of illustration, only two tires 304 are shown in FIG. 1, but actually four tires 304 are mounted.

The traveling battery 20 is an assembled battery in which a plurality of battery cells 20A are connected in series.
That is, the vibration device 10 vibrates a battery cell 20A of an assembled battery (traveling battery 20) composed of a plurality of battery cells 20A connected in series.
By connecting a plurality of battery cells in this way, the traveling battery 20 can supply high voltage power.
The battery 20 for traveling is charged by connecting an external charger 50 to a charging port 104 provided outside the vehicle body of the electric vehicle 30 and supplying external power. More specifically, when the external charger 50 connected to the charging port 104 is a normal charger that charges at a single phase of about 100 V to 200 V, charging is performed by the in-vehicle charger 102 mounted on the electric vehicle 30. The voltage is increased to an appropriate voltage and supplied to the traveling battery 20. In addition, when the external charger 50 connected to the charging port 104 is a quick charger that charges at about AC to 500 V, the power supplied from the charging port 104 is supplied to the traveling battery 20 as it is.
In FIG. 1, only one charging port 104 is shown, but normally two charging ports, a charging port for normal charging and a charging port for quick charging, are provided.

Further, charging of the traveling battery 20 is also performed when the electric vehicle 30 is regenerated.
In other words, the regenerative force generated when the electric vehicle 30 decelerates is used to generate power with the motor 302, and the generated power is stored in the traveling battery 20, so that the traveling battery 20 is charged even during traveling.

Next, the battery cell 20A that constitutes the traveling battery 20 will be described.
2-5 is explanatory drawing which shows the structure of 20 A of battery cells.
2A shows the external appearance of the battery cell 20A, and FIG. 2B shows the internal configuration of the battery cell 20A.
In the present embodiment, it is assumed that the battery cell 20A is a lithium ion secondary battery.
As shown in FIG. 2B, the battery cell 20A includes an electrode body 202, a rectangular plate-like container 204 that accommodates the electrode body 202, and positive and negative electrode terminals 206 and 208 provided in the container 204. ing.
The electrode body 202 is impregnated with an electrolytic solution containing lithium ions.
As shown in FIG. 3, the electrode body 202 includes a positive electrode 2022, a negative electrode 2024, and two separators 2026 and 2028.
That is, the battery cell 20A includes an electrode body 202 including a positive electrode 2022 and a negative electrode 2024, and an electrolytic solution containing lithium ions.

The positive electrode 2022 has a strip shape having a length larger than the width.
As shown in FIG. 4, the positive electrode 2022 has a three-layer structure, and is composed of a positive electrode current collector foil 2022A located at the center in the thickness direction and a positive electrode active material 2022B formed on both surfaces thereof. The positive electrode current collector foil 2022A is connected to the positive electrode terminal 206 of the container 204 via a connection member (not shown).
An aluminum foil is used as the positive electrode current collector foil 2022A, and lithium cobalt oxide or the like is used as the positive electrode active material 2022B.

The negative electrode 2024 has a strip shape having a length larger than the width.
As shown in FIG. 4, the negative electrode 2024 has a three-layer structure, and includes a negative electrode current collector foil 2024A located in the center in the thickness direction, and a negative electrode active material 2024B formed on both surfaces thereof. The negative electrode current collector foil 2024A is connected to the negative electrode terminal 208 of the container 204 through a connection member (not shown).
A copper foil is used as the negative electrode current collector foil 2024A, and a carbon material or the like is used as the negative electrode active material 2024B.

The separators 2026 and 2028 have a strip shape having a length larger than the width, and are made of a porous insulating film capable of moving lithium ions.
In the electrode body 202, a positive electrode 2022 and a negative electrode 2024 are overlapped and wound a plurality of times with separators 2026 and 2028 interposed therebetween, and have an elliptical shape with a flat cross section as shown in FIG.
Specifically, the separator 2026, the positive electrode 2022, the separator 2028, and the negative electrode 2024 are overlapped in this order, and are wound a plurality of times with the separator 2026 on the outside and the negative electrode 2024 on the inside.
The electrode body 202 is stored in the container 204 in such a state.

Here, as shown in FIG. 2A, each battery cell 20 </ b> A is provided with a vibration means 106 that applies vibration to the battery cell 20 </ b> A.
In the example of FIG. 2A, the vibration means 106 is attached to the lower part of the side surface of the container 204 of each battery cell 20A. That is, the vibration means 106 can individually vibrate each battery cell 20A.
In the present embodiment, the vibration means 106 is a small vibrator and operates under the control of the processing unit 108 (see FIG. 1). Further, the vibration means 106 operates using the power of a predetermined battery cell 20A (voltage control target battery cell described later) in the traveling battery 20.
In addition to the vibrator, various known vibration generators can be used as the vibration means 106.
When the vibration means 106 operates (vibrates), vibration is transmitted to each part of the battery cell 20A. Thereby, the electrolyte concentration in the electrolytic solution contained in the electrode body 202 becomes uniform, and the performance degradation of the battery cell 20A due to the imbalance of the surface film and the generation of lithium dendrite can be suppressed.

Returning to the description of FIG. 1, the processing unit 108 has an interface with a CPU, a ROM that stores and stores a control program, a RAM as an operation area of the control program, an EEPROM that holds various data in a rewritable manner, a peripheral circuit, and the like. The interface part etc. which take are comprised.
The processing unit 108 is, for example, an ECU (Electronic Control Unit) that controls the entire electric vehicle 30, a BMU (Battery Management Unit) that monitors the state of the traveling battery 20 and controls charging / discharging.

The processing unit 108 includes a voltage control target cell selection unit 1082, an excitation target cell selection unit 1084, and an excitation control unit 1086.
The voltage control target cell selection unit 1082 detects the cell voltage of each battery cell 20A, and selects a voltage control target cell whose cell voltage is equal to or higher than a predetermined upper limit voltage.
The battery cell 20 </ b> A selected as the voltage control target cell supplies power to the vibration means 106. As a result, power in the voltage control target cell is consumed, and the cell voltage of the voltage control target cell decreases.

As described above, in an assembled battery including a plurality of battery cells 20A, the progress of deterioration of each battery cell is different by repeating charging and discharging, and the discharge characteristics of each battery cell are slightly different. As a result, the cell voltage of each battery cell 20A varies, and the performance of the assembled battery decreases.
In order to eliminate such voltage variations, the voltage control target cell selection unit 1082 selects a voltage control target cell having a cell voltage higher than a predetermined upper limit voltage, and causes the voltage between the battery cells 20A to be discharged. I try to be even.
That is, the voltage control target cell selection unit 1082 functions as a voltage balancer of the traveling battery 20 that is an assembled battery.
The method of determining the upper limit voltage is arbitrary. For example, it may be an average value of the cell voltages of the plurality of battery cells 20A, or a minimum value of the cell voltage + α (α is a predetermined voltage value determined by the degree of variation of the cell voltage). And so on.

FIG. 6 is an explanatory diagram schematically illustrating voltage balance control by the vibration device 10.
In FIG. 6, the cell voltage of three battery cells, cell A, cell B, and cell C is shown as a bar graph. The cell voltage of the cell A is VA, the cell voltage of the cell B is VB, the cell voltage of the cell C is VC, and the voltage increases in the order of VA <VC <VB.
Here, for example, when the voltage VA of the cell A, which is the lowest cell voltage, is set as the upper limit voltage, power is supplied from the cells B and C exceeding the upper limit voltage to the excitation means 106, and discharging is performed until the voltage VA is reached. Make it.
For example, when the average value (lines N shown in FIG. 6) of the voltages VA, VB, and VC is set as the upper limit voltage, power is supplied from the cell B exceeding the upper limit voltage to the excitation unit 106, Discharge until

Returning to the description of FIG. 1, the vibration target cell selection unit 1084 selects a vibration target cell to be a vibration target by the vibration unit 106.
The vibration control means 1086 supplies the electric power accumulated in the voltage control target cell to the vibration means 106 attached to the vibration target cell to operate the vibration means 106.

In the present embodiment, the vibration target cell selecting unit 1084 selects a battery cell other than the voltage control target cell as the vibration target cell.
At this time, the vibration target cell selection unit 1084 selects, for example, a battery cell whose cell voltage is equal to or lower than a predetermined lower limit voltage as the vibration target cell.

This is because, when the voltage variation occurs in the battery cell 20A in the assembled battery, the battery cell 20A with higher voltage has higher performance (lower deterioration degree), and the battery cell 20A with lower voltage has lower performance (higher deterioration degree). Because.
As described above, it is known that by applying vibration to the secondary battery, the electrolyte concentration in the electrolytic solution can be made uniform and the performance degradation of the secondary battery can be suppressed. For this reason, if only the battery cell 20A having a high voltage (that is, the voltage control target cell) is set as the vibration target cell, there is a possibility that the performance difference between the battery cell 20A having a low voltage and low performance may be further expanded.
Therefore, in the present embodiment, the battery cell other than the voltage control target cell, in particular, the battery cell 20A having a low voltage is used as the vibration target cell, thereby further reducing the performance of the battery cell 20A having a low deteriorated voltage. Suppress. As a result, the performance between the battery cells can be made uniform, and the performance of the entire traveling battery 20 can be improved.

  The method of determining the lower limit voltage is arbitrary. For example, an average value of the cell voltages of the plurality of battery cells 20A or a minimum value of the cell voltage + β (β is a predetermined voltage value determined by, for example, the degree of variation of the cell voltage. And a value smaller than the above α (may be 0).

FIG. 7 is an explanatory diagram schematically showing a power supply path to the vibration means 106.
FIG. 7 illustrates three battery cells 20 </ b> A and the processing unit 108.
In each of the three battery cells 20A, the positive electrode terminal 206 and the negative electrode terminal 208 are connected by a wiring L1 indicated by a bold line, and are connected in series.
Moreover, the vibration means 106 which each operates using electric power is attached to the container 204 of each battery cell 20A.
Moreover, the wiring L2 toward the processing unit 108 extends from the electrode terminals 206 and 208 of each battery cell 20A.
From the processing unit 108, a wiring L3 for supplying electric power to each excitation unit 106 extends.
In the vibration control means 1086 (see FIG. 1) of the processing unit 108, a switch for connecting the wirings L2 and L3 is provided. By switching this switch, the electric power in any battery cell 20A can be arbitrarily set. It is possible to supply to the vibration means 106.
That is, in the processing unit 108, the battery cell 20A having a cell voltage higher than the upper limit voltage is selected as a voltage control target cell, and the battery cell 20A having a cell voltage lower than the lower limit voltage is selected as a vibration target cell. Then, by supplying the power of the voltage control target cell to the vibration means 106 attached to the vibration target cell, the voltage control target cell can be discharged and the vibration target cell can be vibrated.

FIG. 8 is a flowchart illustrating a processing procedure performed by the vibration exciter 10.
In the flowchart of FIG. 8, the vibration exciter 10 acquires the cell voltage of each battery cell by the processing unit 108 (step S800).
Next, the voltage control target cell selection unit 1082 of the processing unit 108 determines whether or not the voltage variation between the battery cells 20A is greater than or equal to a predetermined range (step S802). The predetermined range indicates an allowable range of voltage variation.
When the variation between the battery cells 20A is less than the predetermined range (step S802: No), the process returns to step S800, and cell voltage monitoring is continued.

On the other hand, when the voltage variation between the battery cells 20A is equal to or greater than the predetermined range (step S802: Yes), a battery cell having a cell voltage equal to or higher than the upper limit voltage is selected as a voltage control target cell (step S804).
Next, the vibration target cell selection unit 1084 selects a battery cell other than the voltage control target cell, for example, a battery cell whose cell voltage is equal to or lower than the lower limit voltage as the vibration target cell (step S806).

Then, the vibration control unit 1086 supplies the power stored in the voltage control target cell to the vibration unit 106 attached to the vibration target cell to operate the vibration unit 106 (step S808).
Until the cell voltage of the voltage control target cell becomes lower than the upper limit voltage (step S810: No), the process returns to step S808 and the power supply to the vibration means 106 is continued.
Then, when the cell voltage of the voltage control target cell becomes less than the upper limit voltage (step S810: Yes), the power supply to the vibration means 106 is stopped and the vibration means 106 is stopped (step S812). The process ends.
Note that the determination in step S810 is performed individually for each voltage control target cell. That is, since the difference between the cell voltage and the upper limit voltage of each voltage control target cell is individually different, the power supply time to the vibration means 106 is also different.

In the above-described embodiment, the case where the vibration means 106 is attached to the lower part of the side surface of the container 204 of the battery cell 20A is illustrated.
However, the attachment position of the vibration means 106 is not limited to this. For example, as shown in FIG. 9, the electrode terminal of the battery cell 20A, particularly the negative electrode terminal 208 may be used.
In this case, generation of lithium dendrite formed on the negative electrode 2024 of the electrode body 202 can be efficiently suppressed by oscillating the negative electrode terminal 208 by the oscillating means 106.
If the vibration means 106 is a device that vibrates a place away from the attachment position, the negative electrode terminal 208 is adjusted appropriately so as to vibrate regardless of the attachment position of the vibration means 106.

Further, when attaching the vibration means 106 to the container 204 of the battery cell 20A, it is possible to efficiently collect the electrolyte pool in the container 204 by attaching it to the lower side or bottom surface of the container 204 as shown in FIG. 2A. The electrolyte concentration can be made uniform.
In addition, when the container 204 of the battery cell 20A is placed horizontally, the vibration means 106 is attached to the wall surface on the gravity direction side where the liquid pool can be accumulated among the wall surfaces of the container 204.
Further, when the vibration means 106 is a device that vibrates a place away from the attachment position, the position where the electrolyte pool can be pooled is adjusted as appropriate regardless of the attachment position of the vibration means 106. To do.

  Further, the number of vibration means 106 attached to one battery cell 20A is not limited to one and may be plural. In this case, for example, it may be determined whether the vibration means 106 is operated according to the charge / discharge state of the battery cell 20A or the surrounding environment (for example, temperature).

In FIG. 2A, the vibration means 106 is attached to each battery cell 20A. However, the present invention is not limited to this. For example, the battery module 20 is composed of several battery cells 20A or a battery of the traveling battery 20. The vibration means 106 may be attached to the case or the like.
FIG. 10 shows an example in which the vibration means 106 is attached to the battery case 20 </ b> B of the traveling battery 20. That is, in FIG. 10, the traveling battery 20 that is an assembled battery has a plurality of battery cells 20A stored in a battery case 20B, and the vibration means 106 is configured to vibrate the battery case 20B. .
Thereby, not only the specific battery cell 20A but all the battery cells 20A are vibrated, and it can be expected that the performance degradation is suppressed in all the battery cells 20A.

As described above, the vibration device 10 according to the embodiment drives the vibration unit 106 using the power of the voltage control target cell whose cell voltage is equal to or higher than the predetermined upper limit voltage. Thereby, when a voltage variation occurs in the battery cell 20A in the traveling battery 20 which is an assembled battery, the power can be used for vibration of the battery cell 20A, rather than consuming electric power simply by discharging, The power in the battery cell 20A can be used more effectively.
Moreover, the vibration apparatus 10 makes battery cell 20A other than a voltage control object cell a vibration object cell. The voltage control target cell is a battery cell 20A with relatively high performance that has not deteriorated. By using the battery cell 20A with other deterioration as a vibration target cell, the performance variation between the battery cells is different. It is suppressed and the battery performance of the whole assembled battery can be improved.
In addition, the vibration device 10 selects a battery cell 20A whose cell voltage is equal to or lower than a predetermined lower limit voltage as a vibration target cell. The battery cell 20A having a relatively low voltage is a battery cell that has deteriorated. By selecting and vibrating such a battery cell 20A, it is possible to further suppress the performance variation between the battery cells.
Further, in the vibration device 10, if the vibration means 106 vibrates the lower side or bottom surface of the container 204 of the battery cell 20 </ b> A, the liquid pool of the electrolyte in the container 204 can be vibrated efficiently. It is possible to quickly make the electrolyte concentration uniform.
Further, in the vibration device 10, if the negative electrode terminal 208 of the battery cell 20 </ b> A is vibrated by the vibration means 106, generation of lithium dendrite formed on the negative electrode 2024 of the electrode body 202 is efficiently performed. Can be suppressed.
Further, in the vibration device 10, since the vibration case 106 vibrates the battery case 20B of the battery 20 for traveling, not only the specific battery cell 20A but also all the battery cells 20A are vibrated and all the battery cells 20A are vibrated. In this case, it can be expected to suppress the performance degradation.

  In the above-described embodiment, the traveling battery 20 is an assembled battery in which a plurality of battery cells 20A are connected in series. However, the present invention is not limited to this, and the plurality of battery cells 20A include a parallel connection. The assembled battery may be connected.

  DESCRIPTION OF SYMBOLS 10 ... Excitation apparatus, 102 ... Car charger, 104 ... Charging port, 106 ... Excitation means, 108 ... Processing part, 1082 ... Voltage control object cell selection means, 1084 ... Excitation object cell Selection means, 1086 ... vibration control means, 20 ... battery for traveling, 20A ... battery cell, 20B ... battery case, 202 ... electrode body, 204 ... container, 206, 208 ... electrode terminal, 30 ... Electric car, 302 ... Motor, 304 ... Tire.

Claims (6)

A vibration device for vibrating a battery pack composed of a plurality of battery cells,
Voltage control target cell selection means for detecting a cell voltage of each of the battery cells and selecting a voltage control target cell whose cell voltage is equal to or higher than a predetermined upper limit voltage;
Vibration means for applying vibration to the battery cell using electric power stored in the voltage control target cell;
A vibration apparatus comprising: The vibration means is individually attached to each of the battery cells,
A vibration target cell selecting means for selecting a vibration target cell to be vibrated by the vibration means;
Vibration control means for supplying the power stored in the voltage control target cell to the vibration means attached to the vibration target cell and operating the vibration means;
The excitation target cell selection means selects a battery cell other than the voltage control target cell as the excitation target cell.
The vibration device according to claim 1. The excitation target cell selection unit selects, as the excitation target cell, a battery cell whose cell voltage is equal to or lower than a predetermined lower limit voltage.
The vibration device according to claim 2. In the battery cell, an electrode body composed of a positive electrode and a negative electrode, and an electrolyte solution containing an electrolyte and impregnated in the electrode body are stored in a container, and electrode terminals respectively connected to the positive electrode and the negative electrode are stored in the container. Provided outside,
The vibration means vibrates the lower side or bottom of the side surface of the container,
The vibration apparatus according to any one of claims 1 to 3, wherein In the battery cell, an electrode body composed of a positive electrode and a negative electrode, and an electrolyte solution containing an electrolyte and impregnated in the electrode body are stored in a container, and electrode terminals respectively connected to the positive electrode and the negative electrode are stored in the container. Provided outside,
The vibration means vibrates the negative electrode terminal;
The vibration apparatus according to any one of claims 1 to 3, wherein The assembled battery includes a plurality of battery cells stored in a battery case,
The vibration means vibrates the battery case;
The vibration device according to claim 1.

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