JP6958619B2 - Battery modules, container-type power storage systems, vehicles, power storage systems, power tools and electronic devices - Google Patents

Description

The present technology relates to battery modules applicable to container-type power storage systems, vehicles, power storage systems, power tools, electronic devices, and the like. More specifically, the present invention relates to a battery module including an exterior body that houses a battery unit containing a plurality of batteries.

In recent years, there has been an increasing demand for battery modules containing lithium-ion batteries and the like as power sources for hybrid devices driven by engines and motors and devices driven by motors. In the battery module, a battery such as a lithium-ion battery, one or more battery blocks composed of battery holders for holding a plurality of the batteries, and parts such as a circuit board are housed in, for example, a plastic outer case. Is formed by. Further, the battery module is provided with, for example, a terminal-shaped output. This battery module shall be used as a power source for various electric devices used outdoors such as electronic devices such as notebook PCs, assisted bicycles, electric bikes, electric wheelchairs, electric tricycles, electric carts, and electric tools. Can be done. At the same time, there is an increasing demand for battery packs that can be used with high output and long life for the usage environment suitable for these applications.

Under such circumstances, since the battery module is premised on a system that generates high output, it is necessary to take heat dissipation measures against deterioration of battery performance due to heat generated from the battery. Further, when the outer body for accommodating the battery is made of metal, a short circuit may occur between the battery and the outer body, so that an insulation measure is also required.

As battery packs having insulation and heat dissipation, for example, Patent Document 1 describes a main storage case having a power output terminal, at least one submodule stored in the main storage case, and the main storage case. The sub-module is housed inside and includes a control unit that controls at least one of charging and discharging of the unit battery, and the sub-module is a sub-module so that the terminal portion of the battery block each consisting of a plurality of unit batteries is not exposed. A battery unit in which two or more battery blocks are stored in a storage case and the battery blocks are connected to each other by an electrical connecting member is disclosed.

Further, for example, Patent Document 2 describes a plurality of elementary batteries having an open portion for discharging gas generated inside the battery, a heat transfer member having a plurality of battery accommodating portions for accommodating the plurality of elementary batteries, and the above. A connection body for a first pole and a second pole for electrically connecting the elementary batteries arranged in the first and second poles of the plurality of batteries, respectively, is provided, and the heat transfer member is a battery accommodating portion of the plurality of batteries. A first through hole substantially parallel to the battery accommodating portion is provided between them, and the first and second pole connections have second and third through holes communicating with the through hole of the heat transfer member. The battery module provided with the above is disclosed.

Japanese Unexamined Patent Publication No. 2015-053276 Japanese Unexamined Patent Publication No. 2014-197452

However, the techniques proposed in Patent Documents 1 and 2 may not be able to further improve heat dissipation while having insulating properties.

Therefore, the present technology has been made in view of such a situation, and its main purpose is to provide a battery module having improved heat dissipation while maintaining insulation.

The present technology has a battery accommodating portion for accommodating a plurality of batteries, a battery unit in which a plurality of batteries accommodated in the battery accommodating portion are connected by a connection tab, an exterior body accommodating the battery unit, an exterior body, and an exterior body. Provided is a battery module comprising an insulator disposed between the battery units, the insulator being in contact with the exterior body and the battery unit, and the exterior body and the battery unit being close to each other with the insulator in between.

Further, the present technology controls a power storage device having a battery module according to the present technology, a power conversion device that converts the power input from the battery module into desired power, and a power supply from the battery module to the power conversion device. Provided is a container-type power storage system including a control device, a power storage device, a power conversion device, and a container for accommodating the control device.

Further, the present technology includes a driving force conversion device that receives electric power from the battery module according to the present technology and converts it into the driving force of the vehicle, a driving unit that drives according to the driving force, and a vehicle control device. Provide a vehicle. Further, the present technology includes a power storage device having a battery module according to the present technology, a power consuming device to which power is supplied from the battery module, a control device for controlling power supply from the battery module to the power consuming device, and a battery module. Provided is a power storage system including a power generation device for charging the battery. The present technology also provides a power tool including a battery module according to the present technology and a movable portion to which electric power is supplied from the battery module. In addition, an electronic device including a battery module according to the present technology and receiving electric power from the battery module is provided.

According to the present technology, it is possible to provide a battery module having improved heat dissipation while maintaining insulation. The effects described here are not necessarily limited, and may be any of the effects described in the present disclosure, or an effect different from them.

It is an exploded perspective view which shows the structural example of the battery module of 1st Embodiment which concerns on this technology. It is a perspective view which shows the structural example of the battery unit shown in FIG. It is a partially enlarged view which shows the structural example of a part of the battery unit shown in FIG. It is a partial plan view which shows the example of the degassing structure of the surface of the battery unit shown in FIG. It is sectional drawing of the line segment AA of the battery unit shown in FIG. It is a partially enlarged plan view which shows the surface of the battery unit shown in FIG. It is an enlarged sectional schematic diagram of the line segment AA of the battery unit shown in FIG. It is sectional drawing for demonstrating the battery module which does not have a degassing structure. It is a schematic diagram which shows the example of the degassing structure of the battery unit shown in FIG. It is a schematic diagram which shows the example of the degassing method of the battery module shown in FIG. It is a perspective view which shows the structural example of the container power storage system of the 2nd Embodiment which concerns on this technology. It is a perspective view which shows the structural example of the vehicle of the 3rd Embodiment which concerns on this technology. It is a perspective view which shows the structural example of the power storage system of 4th Embodiment which concerns on this technology. It is a block diagram which shows the structural example of the power tool of 5th Embodiment which concerns on this technique. It is a block diagram which shows the structural example of the electronic device of 6th Embodiment which concerns on this technology.

Hereinafter, suitable embodiments for carrying out the present technology will be described with reference to the drawings. The embodiments described below can be combined with any of the embodiments. It shows an example of a typical embodiment of the present technology, and the scope of the present technology is not narrowly interpreted by this. In addition, the embodiments described below may be a combination of any one or more embodiments. In the drawings, the same or equivalent elements or members are designated by the same reference numerals, and duplicate description will be omitted.

The explanation will be given in the following order.
1. 1. 1st Embodiment (Battery module configuration example)
(1-1) Battery module configuration example (1-2) Battery unit configuration example (1-3) Battery unit degassing structure example (1-4) Battery module degassing method example (1-5) Exterior Experimental results of the distance between the body and the battery unit 2. Second embodiment (configuration example of container power storage system)
3. 3. Third Embodiment (Vehicle configuration example)
4. Fourth Embodiment (Structure example of power storage system)
5. Fifth Embodiment (Structure example of power tool)
6. Sixth Embodiment (Example of configuration of electronic device)

<1. 1st Embodiment (Battery module configuration example)>
The battery module of the first embodiment according to the present technology will be described with reference to FIGS. 1 to 10. In the present embodiment, as an example, a battery module accommodating a cylindrical lithium ion secondary battery will be described.

(1-1) Configuration Example of Battery Module As shown in FIG. 1, the battery module 1 of the present embodiment includes an upper exterior case 2, an upper insulator 3, a battery unit 4, a lower insulator 5, and a lower portion. It includes an outer case 6. The upper exterior case 2 and the lower exterior case 6 form an exterior body for accommodating the battery unit 4.

The upper exterior case 2 and the lower exterior case 6 are housings made of, for example, a metal such as aluminum or iron. The upper exterior case 2 and the lower exterior case 6 are formed in a substantially rectangular plate shape, respectively, and the front surface (upper surface) and the back surface (lower surface) of the battery unit 4 are viewed from above and below via the upper insulator 3 and the lower insulator 5. Covering. Further, bent portions 7 and 8 bent in the direction toward the battery unit 4 facing each other are formed at the ends of the upper exterior case 2 and the lower exterior case 6. The inner surfaces of the upper exterior case 2 and the lower exterior case 6 may be curved in the direction of contact with the upper insulator 3 and the lower insulator 5, respectively. With such a shape, the upper exterior case 2 and the lower exterior case 6 can improve the adhesion to the battery unit 4.

The upper insulator 3 is formed in a substantially rectangular plate shape, and is arranged in contact with the surfaces of the upper exterior case 2 and the battery unit 4. Similarly, the lower insulator 5 is formed in a substantially rectangular plate shape, and is arranged in contact with the back surface of the battery unit 4 and the lower exterior case 6. For the upper insulator 3 and the lower insulator 5, for example, an insulating material such as polycarbonate can be used. Further, the upper insulator 3 and the lower insulator 5 are arranged so as to cover the entire surface of the connection tabs on the front surface and the back surface of the battery unit 4 without a break, and are adhered or screwed to the battery unit 4 with double-sided adhesive tape or the like. And fixed.

The upper exterior case 2, the lower exterior case 6, and the battery unit 4 are close to each other with the upper insulator 3 and the lower insulator 5 interposed therebetween. The close distance between the upper exterior case 2 and the lower exterior case 6 and the battery unit 4 is preferably 0.4 mm to 0.8 mm. On the other hand, the upper exterior case 2 and the lower exterior case 6 and the upper insulator 3 and the lower insulator 5 are in close contact with each other and fixed to each other. With these configurations, the battery module 1 minimizes the distance between the upper exterior case 2 and the lower exterior case 6 and the connection tab of the battery unit 4, thereby reducing the thermal resistance while maintaining the insulation property and dissipating heat. Can be improved to the maximum.

(1-2) Configuration Example of Battery Unit An example of the configuration of the battery unit 4 of the present embodiment will be described with reference to FIGS. 2 and 3. FIG. 2 is a perspective view showing a configuration example of the battery unit 4 of the present embodiment. FIG. 3 is a partially enlarged view showing a configuration example in a circle A which is a part of the battery unit 4 shown in FIG.

As shown in FIG. 2, the battery unit 4 of the present embodiment has a battery accommodating portion 22 accommodating a plurality of batteries 21, and the plurality of batteries 21 accommodated in the battery accommodating portion 22 are connected by a connection tab 23. doing. In the battery unit 4, a battery 21 having a positive electrode 21a on the front surface side and a battery 21 having a negative electrode 21b on the front surface side are housed in a positive electrode side battery accommodating portion 22a and a negative electrode side battery accommodating portion 22b, respectively, and are arranged alternately in each row. Has been done.

As shown in FIGS. 2 and 3, the battery accommodating portion 22 and the connection tab 23 are not provided with protrusions on the surface of the battery unit 4 in the direction in which the upper insulator 3 is arranged. Similarly, the battery accommodating portion 22 and the connection tab 23 are not provided with protrusions on the back surface of the battery unit 4 in the direction in which the lower insulator 5 is arranged. Further, as shown in FIG. 3, at the end of the connection tab 23, an L-shaped bent portion 24 protruding toward the battery accommodating portion 22 is formed so as to be fitted into the recess of the battery accommodating portion 22.

With the above configuration, the battery module 1 of the present embodiment flattens the surface of the connection tab 23 by positioning the connection tab 23 at the L-shaped bending portion 24 of the connection tab 23. As a result, the battery module 1 can minimize the distance between the upper exterior case 2 and the lower exterior case 6 and the connection tab 23 to minimize the thermal resistance, so that a high heat dissipation effect can be realized.

(1-3) Example of Degassing Structure of Battery Unit An example of the degassing structure provided in the battery unit 4 of the battery module 1 of the present embodiment will be described with reference to FIGS. 4 to 9. FIG. 4 is a partial plan view showing an example of a degassing structure on the surface of the battery unit 4. FIG. 5 is a schematic cross-sectional view showing a cross section of the line segments AA of the battery unit 4. FIG. 6 is a partially enlarged plan view showing the surface of the battery unit 4. FIG. 7 is an enlarged schematic cross-sectional view of the line segments AA of the battery unit 4. FIG. 8 is a schematic cross-sectional view for explaining a battery module having no degassing structure. FIG. 9A is a schematic plan view showing an example of a degassing structure of the battery unit 4. FIG. 9B is a schematic cross-sectional view showing an example of a degassing structure of the battery unit 4.

As shown in FIGS. 4 and 6, in the battery accommodating portion 22 of the battery unit 4, as an example, one or a plurality of induction grooves for inducing the high temperature gas generated from the positive electrode side electrode into the positive electrode side battery accommodating portion 22a. 25 is provided. The guide groove 25 is formed in a rod shape having a substantially semicircular tip extending in the plane direction of the connection tab 23 from the circumference of the positive electrode side battery accommodating portion 22a having a circular plane shape. In the present embodiment, the guide groove 25 of each positive electrode side battery accommodating portion 22a extends in the same direction on the plane of the connection tab 23. Further, as shown in FIGS. 5 and 7, the guide groove 25 extends from the substantially semicircular portion of the tip in the vertical direction of the battery 21. That is, the cross-sectional shape of the guide groove 25 is formed in an L shape in contact with the positive electrode surface and the side surface of the battery 21. When inducing the high temperature gas generated from the electrode on the negative electrode side, an induction groove can be provided in the battery accommodating portion on the negative electrode side.

Here, as shown in FIG. 8, when the battery accommodating portion 31 accommodating the battery 21 is not formed with a degassing structure, if the distance between the upper exterior case 2 and the connection tab 23 is minimized, the battery 21 is released. When the high temperature gas is ejected from the inside of the battery 21 due to abnormal heat generation, it becomes difficult to release the high temperature gas to the outside. As a result, the high-temperature gas is compressed, and the temperature becomes higher, and the heat is propagated to the other battery 21, which may cause propagation.

Therefore, as shown in FIG. 9A, the positive electrode side battery accommodating portion 22a of the present embodiment is provided with an induction groove 25 for discharging the high temperature gas generated from the positive electrode side 21a side of the battery 21 to the outside. Further, as shown in FIG. 9B, the battery accommodating portion 22 of the present embodiment is provided with a gas discharge hole 41 that communicates with the guide groove 25 and discharges the high temperature gas that has passed through the guide groove 25 to the outside. The gas discharge hole 41 is formed in the central portion of the battery unit 4 in the thickness direction. The gas discharge hole 41 can have a semicircular cross-sectional shape.

As described above, the battery module 1 of the present embodiment is provided with the guide groove 25 and the gas discharge hole 41 in the battery accommodating portion 22, so that the high temperature gas generated from the inside of the battery 21 is discharged into the upper exterior case 2 and the lower exterior case 6. It is possible to easily get out of the space of the battery module 1 in the gap between the two. As a result, the battery module 1 can improve safety while ensuring insulation and heat dissipation.

(1-4) Example of Degassing Method of Battery Module An example of the degassing method of the battery module 1 of the present embodiment will be described with reference to FIG. FIG. 10A is a schematic cross-sectional view showing the battery module 1 before degassing. FIG. 10B is a schematic view showing the state of gas passing through the battery module 1 during degassing.

First, if the battery 21 abnormally generates heat while the battery module 1 is in use, high-temperature gas may be generated inside the battery 21 and the high-temperature gas may be ejected from the positive electrode 21a side. In this case, the ejected high-temperature gas is guided from the positive electrode 21a side through the guide groove 25 formed in the positive electrode side battery housing portion 22a to the tip in the plane direction of the guide groove 25.

Next, the high-temperature gas guided to the tip in the plane direction of the guide groove 25 passes through the guide groove 25 extending from there in the vertical direction of the battery 21, and the central portion in the thickness direction of the battery unit 4. It is guided to the gas discharge hole 41 formed in.

Then, the high-temperature gas guided to the gas discharge hole 41 is discharged from there through the gas discharge hole 41 to the space of the battery module 1 and the outside of the battery module 1.

As described above, in the battery module 1 of the present embodiment, the thin upper insulator 3 and the lower insulator 5 are closely arranged between the upper exterior case 2, the lower exterior case 6, and the battery unit 4 with double-sided adhesive tape or the like. As a result, the thermal resistance is minimized by bringing the connection tab 23 close to the metallic upper exterior case 2 and lower exterior case 6 while ensuring insulation, and the battery 21 to the upper exterior case 2 and the lower exterior case 2 and the lower exterior case 6 are brought close to each other. The heat dissipation effect to the case 6 can be enhanced.

Further, the battery module 1 is in close contact with the upper exterior case 2 and the lower exterior case 6 with the upper insulator 3 and the lower insulator 5 and the connection tab 23, so that the position of the battery 21 in the battery module 1 is reached. Fixation can be increased. Further, the battery module 1 can facilitate the positioning of the battery 21 and the connection tab 23 by forming the connection tab 23 along the groove provided at a predetermined position of the battery accommodating portion 22. In the battery module 1, when an internal short circuit occurs in the battery 21, the connection tab 23 between the batteries 21 serves as a large current fuse, so that the battery module 1 abnormally propagates to the surrounding batteries 21. Can also be prevented. Further, in FIG. 2, in FIG. 2, one connection tab 23 is arranged on the left and right sides of the battery module 1 line-symmetrically with respect to the center line in the left-right direction of the surface of the battery unit 4. With this configuration, since the connection tab 23 of the battery module 1 is symmetrical with respect to the center line, it is possible to prevent an assembly error and facilitate handling at the time of manufacturing.

(1-5) Experimental Results of Distance Between Exterior Body and Battery Unit Next, using Table 1, experiments on suitable distances between exterior bodies 2 and 6 of the battery module 1 and the battery unit 4 are performed. The method and experimental results will be described. Table 1 below shows the battery 21 in the battery module 1 when the distance between the exterior bodies 2 and 6 and the battery unit 4 (thickness of the insulators 3 and 5) is changed from 0.4 mm to 2.0 mm. Experiments 1 to 5 in which the temperature rise of the above is measured are shown. The temperature rise of the battery 21 measures the maximum temperature of the battery 21 among the plurality of batteries 21. In Experiments 1 to 5, the discharge conditions are continuously discharged at 4 ° C., and the ambient temperature of the battery module 1 is set to 45 ° C. Here, the temperature rise value can be obtained as, for example, (temperature of battery module 1-atmosphere temperature 45 ° C.). In Table 1, the “determination” indicates “OK” when the temperature rise value is 30 ° C. or lower, and “NG” when the temperature rise value exceeds 30 ° C. This is because if the temperature rise value exceeds 30 ° C., the temperature of the battery module 1 exceeds 75 ° C., and the life of the battery 21 may be significantly shortened.

From the above experimental results, it was found that the temperature rise of the battery 21 must be suppressed to 30 ° C. in order to improve the heat dissipation of the battery module 1 and suppress the decrease in the life of the battery 21. From this, it was found that the distance between the exterior bodies 2 and 6 and the battery unit 4 is preferably in the range of 0.4 mm to 0.8 mm.

<2. Second Embodiment (configuration example of container power storage system)>
The container power storage system of the second embodiment according to the present technology includes a power storage device having the battery module of the first embodiment according to the present technology, a power conversion device that converts the power input from the battery module into desired power, and the power conversion device. It is a container-type power storage system including a control device for controlling power supply from a battery module to a power conversion device, and a container for accommodating the power storage device, the power conversion device, and the control device. Since the container power storage system of the second embodiment according to the present technology includes the battery module of the first embodiment according to the present technology having excellent maintainability and excellent reliability, maintenance performance and reliability of power storage are provided. Leads to improvement.

Hereinafter, an example of the container power storage system of the second embodiment according to the present technology will be described with reference to FIG. FIG. 11 shows an internal structure of a container-type power storage system 110 having a substantially rectangular parallelepiped shape, which is divided into two by a dividing line in the longitudinal direction.

As shown in FIG. 11, the container-type power storage system 110 includes a conductive container 111, a DC input / output board 112, an AC / DC converter INV, and strings ST1 to ST14.

Container 111, for example, is a metal box having a length of 40 feet. Inside the container-type power storage system 110, a passage extending in the longitudinal direction having a width sufficient for a person to walk is formed in the center of the width direction. A wiring duct is provided on the ceiling of the container 111. A DC power wiring Lp, a communication wiring Lc, and the like are passed through the wiring duct. The container 111 is connected to the ground through the grounding means LE1.

The AC / DC converter INV and the DC input / output board 112 are housed in the container 111. The AC / DC conversion device INV is, for example, a power conversion device that converts the power input from the battery module 1 into desired power. In the DC input / output board 112, the AC / DC converter INV and the DC input / output board 112 are electrically connected to the container 111 and are grounded through the container 111.

The strings ST1 to ST14 are arranged by stacking a plurality of power storage modules M and dividing them in parallel in the longitudinal direction of the container 111. Strings ST1 to ST7 are provided on the back side of FIG. 11, and strings ST8 to ST14 are provided on the front side. One string ST is configured by accommodating a battery management unit BMU and 16 (2 rows × 8 stages) power storage modules M in a metal battery rack. The plurality of battery racks are arranged so as to be mechanically and electrically connectable to each other. The power storage module M of each string ST is placed on the shelf board of each battery rack, and its grounding point is electrically connected to the shelf board. Each battery rack is electrically connected to the container 111 and is grounded through the container 111.

The power storage modules M1 to M16 housed in each string ST are connected in series to each other, and the positive electrode terminal side and the negative electrode terminal side connected in series to the battery management unit BMU are connected to each other. The battery management unit BMU and the AC / DC converter INV (power conditioner PCS) are connected by a DC power wiring Lp. Further, the communication terminals of the power storage modules M1 to M16 are sequentially connected and connected to the communication terminals of the battery management unit BMU. The battery management unit BMU and the system controller SYS are connected by a communication wiring Lc. Although not shown, the container 111 contains a line concentrator HUB for collecting communication wiring Lc of a plurality of string STs.

<3. Third Embodiment (Vehicle configuration example)>
The vehicle of the third embodiment according to the present technology includes the battery module of the first embodiment according to the present technology, a driving force conversion device that receives electric power from the battery module and converts it into the driving force of the vehicle, and the driving force. It is a vehicle including a drive unit that is driven accordingly and a vehicle control device. Since the vehicle of the third embodiment according to the present technology is provided with the battery module of the first embodiment according to the present technology having excellent maintainability and excellent reliability, the maintenance performance and the reliability of the vehicle can be improved. Connect.

Hereinafter, the vehicle of the third embodiment according to the present technology will be described with reference to FIG.

FIG. 12 schematically shows an example of a configuration of a hybrid vehicle that employs a series hybrid system to which the present technology is applied. The series hybrid system is a vehicle that runs on a power driving force converter using the electric power generated by an engine-powered generator or the electric power temporarily stored in a battery.

The hybrid vehicle 7200 includes an engine 7201, a generator 7202, a power driving force converter 7203, a drive wheel 7204a, a drive wheel 7204b, a wheel 7205a, a wheel 7205b, a battery 7208, a vehicle control device 7209, various sensors 7210, and a charging port 7211. Is installed. A power storage device (not shown) is applied to the battery 7208.

The hybrid vehicle 7200 travels by using the electric power driving force conversion device 7203 as a power source. An example of the power driving force conversion device 7203 is a motor. The electric power of the battery 7208 operates the electric power driving force conversion device 7203, and the rotational force of the electric power driving force conversion device 7203 is transmitted to the drive wheels 7204a and 7204b. By using DC-AC (DC-AC) or reverse conversion (AC-DC conversion) at necessary locations, the power driving force conversion device 7203 can be applied to both an AC motor and a DC motor. The various sensors 7210 control the engine speed via the vehicle control device 7209, and control the opening degree (throttle opening degree) of a throttle valve (not shown). The various sensors 7210 include a speed sensor, an acceleration sensor, an engine speed sensor, and the like.

The rotational force of the engine 7201 is transmitted to the generator 7202, and the electric power generated by the generator 7202 can be stored in the battery 7208 by the rotational force.

When the hybrid vehicle decelerates by a braking mechanism (not shown), the resistance force at the time of deceleration is applied to the power driving force conversion device 7203 as a rotational force, and the regenerative power generated by the power driving force conversion device 7203 by this rotational force is applied to the battery 7208. Accumulate.

By connecting the battery 7208 to an external power source of the hybrid vehicle, it is possible to receive electric power from the external power source using the charging port 211 as an input port and store the received electric power.

Although not shown, an information processing device that performs information processing related to vehicle control based on information related to the secondary battery may be provided. As such an information processing device, for example, there is an information processing device that displays the remaining battery level based on information on the remaining battery level.

In the above description, a series hybrid vehicle that runs on a motor using the electric power generated by the generator operated by the engine or the electric power temporarily stored in the battery has been described as an example. However, the present disclosure is also valid for a parallel hybrid vehicle in which the outputs of the engine and the motor are used as drive sources, and the three methods of running only with the engine, running only with the motor, and running with the engine and the motor are appropriately switched and used. Applicable. Further, the present technology can be effectively applied to a so-called electric vehicle that travels by being driven only by a drive motor without using an engine.

<4. Fourth Embodiment (configuration example of power storage system)>
The power storage system of the fourth embodiment according to the present technology includes a power storage device having the battery module of the first embodiment according to the present technology, a power consumption device to which power is supplied from the battery module, and a power consumption device from the battery module. It is a power storage system including a control device for controlling the power supply to the battery and a power generation device for charging the battery module. Since the power storage system of the fourth embodiment according to the present technology includes the battery module of the first embodiment according to the present technology having excellent maintainability and excellent reliability, the maintenance performance and the reliability of power storage can be improved. It leads to improvement.

Hereinafter, a residential power storage system, which is an example of the power storage system of the fourth embodiment according to the present technology, will be described with reference to FIG.

For example, in the power storage system 9100 for a residential 9001, electric power is transmitted from a centralized power system 9002 such as thermal power generation 9002a, nuclear power generation 9002b, and hydroelectric power generation 9002c via a power grid 9009, an information network 9012, a smart meter 9007, a power hub 9008, and the like. It is supplied to the power storage device 9003. At the same time, electric power is supplied to the power storage device 9003 from an independent power source such as the home power generation device 9004. The electric power supplied to the power storage device 9003 is stored. The electric power used in the house 9001 is supplied by using the power storage device 9003. A similar power storage system can be used not only for a house 9001 but also for a building.

The house 9001 is provided with a power generation device 9004, a power consumption device 9005, a power storage device 9003, a control device 9010 for controlling each device, a smart meter 9007, and a sensor 9011 for acquiring various information. Each device is connected by a power grid 9009 and an information network 9012. A solar cell, a fuel cell, or the like is used as the power generation device 9004, and the generated power is supplied to the power consumption device 9005 and / or the power storage device 9003. The power consumption device 9005 includes a refrigerator 9005a, an air conditioner 9005b, a television receiver 9005c, a bath 9005d, and the like. Further, the power consuming device 9005 includes an electric vehicle 9006. The electric vehicle 9006 is an electric vehicle 9006a, a hybrid car 9006b, and an electric motorcycle 9006c.

The battery unit of the present disclosure described above is applied to the power storage device 9003. The power storage device 9003 is composed of a secondary battery or a capacitor. For example, it is composed of a lithium ion battery. The lithium ion battery may be a stationary type or may be used in the electric vehicle 9006. The smart meter 9007 has a function of measuring the usage of commercial power and transmitting the measured usage to the electric power company. The power grid 9009 may be a combination of any one or more of DC power supply, AC power supply, and non-contact power supply.

The various sensors 9011 are, for example, a human sensor, an illuminance sensor, an object detection sensor, a power consumption sensor, a vibration sensor, a contact sensor, a temperature sensor, an infrared sensor, and the like. The information acquired by the various sensors 9011 is transmitted to the control device 9010. Based on the information from the sensor 9011, the weather condition, the human condition, and the like can be grasped, and the power consumption device 9005 can be automatically controlled to minimize the energy consumption. Further, the control device 9010 can transmit information about the house 9001 to an external electric power company or the like via the Internet.

The power hub 9008 performs processing such as branching of power lines and DC / AC conversion. As a communication method of the information network 9012 connected to the control device 9010, a method using a communication interface such as UART (Universal Asynchronous Receiver-Transmitter), Bluetooth (registered trademark), ZigBee, Wi-Fi There is a method of using a sensor network based on wireless communication standards such as. The Bluetooth® method is applied to multimedia communication and can perform one-to-many connection communication. ZigBee uses the physical layer of IEEE (Institute of Electrical and Electronics Engineers) 802.15.4. IEEE802.154 is the name of a short-range wireless network standard called PAN (Personal Area Network) or W (Wireless) PAN.

The control device 9010 is connected to an external server 9013. The server 9013 may be managed by any of the housing 9001, the electric power company, and the service provider. The information sent and received by the server 9013 is, for example, power consumption information, life pattern information, electricity charges, weather information, natural disaster information, and information related to electricity transactions. This information may be transmitted and received from a power consuming device in the home (for example, a television receiver), or may be transmitted and received from a device outside the home (for example, a mobile phone). This information may be displayed on a device having a display function, for example, a television receiver, a mobile phone, a PDA (Personal Digital Assistants), or the like.

The control device 9010 that controls each unit is composed of a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like, and is stored in the power storage device 9003 in this example. The control device 9010 is connected to a power storage device 9003, a home power generation device 9004, a power consumption device 9005, various sensors 9011, a server 9013, and an information network 9012, and has a function of adjusting, for example, the amount of commercial power used and the amount of power generated. have. In addition, it may be provided with a function of conducting electric power transactions in the electric power market.

As described above, not only the centralized power system 9002 such as thermal power 9002a, nuclear power 9002b, and hydraulic power 9002c, but also the power generated by the domestic power generation device 9004 (solar power generation, wind power generation) can be stored in the power storage device 9003. can. Therefore, even if the generated power of the home power generation device 9004 fluctuates, it is possible to perform control such as keeping the amount of power sent to the outside constant or discharging as much as necessary. For example, the electric power obtained by solar power generation is stored in the power storage device 9003, the late-night power which is cheap at night is stored in the power storage device 9003, and the power stored by the power storage device 9003 is discharged during the time when the charge is high in the daytime. You can also use it.

In this example, although the example in which the control device 9010 is stored in the power storage device 9003 has been described, it may be stored in the smart meter 9007 or may be configured independently. Further, the power storage system 9100 may be used for a plurality of homes in an apartment house, or may be used for a plurality of detached houses.

<5. Fifth Embodiment (Structure example of power tool)>
The power tool of the fifth embodiment according to the present technology is a power tool including the battery module of the first embodiment according to the present technology and a movable portion to which electric power is supplied from the battery module. Since the power tool of the fifth embodiment according to the present technology includes the battery module of the first embodiment according to the present technology having excellent maintainability and excellent reliability, the maintenance performance and the reliability of the power tool can be improved. It leads to improvement.

Hereinafter, the power tool of the fifth embodiment according to the present technology will be described with reference to FIG.

FIG. 14 shows a block configuration of a power tool. This power tool is, for example, an electric drill, and includes a control unit 99 and a power supply 100 inside a tool body 98 made of a plastic material or the like. For example, a drill portion 101, which is a movable portion, is attached to the tool body 98 so that it can be operated (rotated).

The control unit 99 controls the operation of the entire power tool (including the usage state of the power supply 100), and includes, for example, a CPU and the like. The power source 100 includes one or more solid-state batteries (not shown). The control unit 99 supplies electric power from the power supply 100 to the drill unit 101 in response to an operation of an operation switch (not shown).

<6. Sixth Embodiment (Example of configuration of electronic device)>
The electronic device of the sixth embodiment according to the present technology is an electronic device including the battery module of the first embodiment according to the present technology and receiving electric power from the battery module. As described above, the electronic device of the sixth embodiment according to the present technology is a device that exhibits various functions by using the battery module as a driving power source (power supply source). Since the electronic device of the sixth embodiment according to the present technology includes the battery module of the first embodiment according to the present technology having excellent maintainability and excellent reliability, the maintenance performance and the reliability of the electronic device can be improved. It leads to improvement.

Hereinafter, the electronic device of the sixth embodiment according to the present technology will be described with reference to FIG.

An example of the configuration of the electronic device 400 according to the sixth embodiment of the present technology will be described. The electronic device 400 includes an electronic circuit 401 of the main body of the electronic device and a battery pack 300. The battery pack 300 is electrically connected to the electronic circuit 401 via the positive electrode terminal 331a and the negative electrode terminal 331b. The electronic device 400 has, for example, a configuration in which the battery pack 300 can be attached and detached by the user. The configuration of the electronic device 400 is not limited to this, and the battery pack 300 is built in the electronic device 400 so that the battery pack 300 cannot be removed from the electronic device 400 by the user. You may.

When charging the battery pack 300, the positive electrode terminal 331a and the negative electrode terminal 331b of the battery pack 300 are connected to the positive electrode terminal and the negative electrode terminal of the charger (not shown), respectively. On the other hand, when the battery pack 300 is discharged (when the electronic device 400 is used), the positive electrode terminal 331a and the negative electrode terminal 331b of the battery pack 300 are connected to the positive electrode terminal and the negative electrode terminal of the electronic circuit 401, respectively.

Examples of the electronic device 400 include a notebook personal computer, a tablet computer, a mobile phone (for example, a smartphone), a personal digital assistant (PDA), an imaging device (for example, a digital still camera, a digital video camera, etc.). ), Audio equipment (eg portable audio player), game equipment, cordless phone handsets, electronic books, electronic dictionaries, radios, headphones, navigation systems, memory cards, pacemakers, hearing aids, lighting equipment, toys, medical equipment, robots, etc. However, it is not limited to this. As a specific example, a head-mounted display and a band-type electronic device will be described. The head-mounted display includes an image display device, a wearing device for mounting the image display device on the observer's head, and an image display device. It is an electronic device provided with a mounting member for mounting the device and using the solid-state battery of the first to third embodiments according to the present technology as a power source for driving, and the band-type electronic device is connected in a band shape. A plurality of segments, a plurality of electronic components arranged in the plurality of segments, and a flexible circuit board connecting a plurality of electronic components in the plurality of segments and arranged in a serpentine shape in at least one segment. As the electronic component, the solid-state battery of the first to third embodiments according to the present technology is a source electronic device arranged in the segment.

The electronic circuit 401 includes, for example, a CPU (Central Processing Unit), a peripheral logic unit, an interface unit, a storage unit, and the like, and controls the entire electronic device 400.

The battery pack 300 includes an assembled battery 301 and a charge / discharge circuit 302. The assembled battery 301 is configured by connecting a plurality of secondary batteries 301a in series and / or in parallel. The plurality of secondary batteries 301a are connected, for example, in n parallel m series (n and m are positive integers). Note that FIG. 6 shows an example in which six secondary batteries 301a are connected in two parallels and three series (2P3S). As the secondary battery 301a, the secondary battery according to the first embodiment or a modification thereof is used.

At the time of charging, the charging / discharging circuit 302 controls charging of the assembled battery 301. On the other hand, at the time of discharging (that is, when the electronic device 400 is used), the charge / discharge circuit 302 controls the discharge to the electronic device 400.

The present technology is not limited to each of the above embodiments and application examples, and can be changed within a range that does not deviate from the gist of the present technology.

1 Battery module 2 Upper exterior case 3 Upper insulator 4 Battery unit 5 Lower insulator 6 Lower exterior case 7, 8 Bending part 21 Battery 22, 31 Battery housing part 23 Connection tab 24 L-shaped bending part 25 Induction groove 41 Gas discharge hole 110 Container type power storage system 111 Container 112 DC input / output panel

Claims (16)

A battery unit having a battery accommodating portion for accommodating a plurality of batteries and connecting the plurality of batteries accommodated in the battery accommodating portion with a connection tab, and a battery unit.
An exterior body that houses the battery unit and
With an insulator disposed between the exterior body and the battery unit,
The insulator is in contact with the exterior body and the battery unit, and the exterior body and the battery unit are close to each other with the insulator in between.
The battery housing portion is formed in an L-shape having a cross-sectional shape in contact with the electrode surface and the side surface of the battery, and is provided with one or a plurality of guide grooves for guiding the high temperature gas generated from the electrodes.
The derived gas discharge holes for discharging the hot gases passing through the groove to the outside is provided in a thickness direction central portion of the battery unit, batteries module. The battery module according to claim 1, wherein the close distance between the exterior body and the battery unit is 0.4 mm to 0.8 mm. The battery module according to claim 1 or 2, wherein the insulator is arranged on the entire surface of the connection tab. The battery module according to any one of claims 1 to 3, wherein the insulator is arranged on the upper surface and the lower surface of the battery unit. The battery module according to any one of claims 1 to 4, wherein the exterior body includes an upper exterior body that covers the upper surface of the battery unit and a lower exterior body that covers the lower surface of the battery unit. The battery module according to any one of claims 1 to 5, wherein the end portion of the exterior body is bent in the direction of the battery unit. The battery module according to any one of claims 1 to 6, wherein the battery accommodating portion and the connection tab are not provided with protrusions in the direction in which the insulator is arranged. 6. The battery module described. The battery module according to any one of claims 1 to 8, wherein the inner surface of the exterior body is curved in a direction of contact with the insulator. The battery module according to any one of claims 1 to 9, wherein the insulator is adhered or screwed to the battery unit. The battery module according to any one of claims 1 to 10 , wherein the gas discharge hole has a semicircular cross section. A power storage device having the battery module according to any one of claims 1 to 11.
A power conversion device that converts the power input from the battery module into desired power, and
A control device that controls the power supply from the battery module to the power conversion device, and
A container-type power storage system including a power storage device, a power conversion device, and a container for accommodating the control device. The battery module according to any one of claims 1 to 11.
A driving force converter that receives electric power from the battery module and converts it into the driving force of the vehicle.
A drive unit that drives according to the driving force,
A vehicle comprising a vehicle control device. A power storage device having the battery module according to any one of claims 1 to 11.
A power consuming device to which power is supplied from the battery module, and
A power storage system including a control device for controlling power supply from the battery module to the power consumption device and a power generation device for charging the battery module. The battery module according to any one of claims 1 to 11.
A power tool comprising a moving portion to which power is supplied from the battery module. The battery module according to any one of claims 1 to 11 is provided.
An electronic device that receives power from the battery module.

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