JP2002216726A - Case for storing battery and battery element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit a temperature rise in a storage battery pack. SOLUTION: The storage battery pack stores two cells 10, 20 constituting the battery elements and has a storage case 30 having an inner side surface shape along an outer side surface shape of the cells 10, 20 and adhesive material 50 interposed between the inner side surface of the storage case 30 and the outer side surface of the cells 10, 20 and in contact with the inner side surface of the storage case 30 and the outer side surface of the cells 10, 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery used as a power source for electronic equipment and a battery storage case for storing electronic elements.

[0002]

2. Description of the Related Art In recent years, information devices such as notebook personal computers and word processors, mobile communication devices such as mobile phones, video cameras,
The demand for AV equipment such as a liquid crystal television has rapidly increased, and electronic equipment in the entertainment field represented by an entertainment robot has also been rapidly developed.

[0003] As described above, as a power source for electronic devices, many sealed small secondary batteries such as nickel-cadmium batteries, nickel-metal hydride batteries, and lithium-ion batteries have been used.
Among them, lithium-ion secondary batteries are utilized in various fields, taking advantage of their characteristics such as high voltage, high energy density, and light weight.

As such a battery structure, at least 2
A plurality of single-cell batteries (battery elements) are connected in series or in parallel, and are packed in a storage case made of hard rubber or a resin material, for example, polycarbonate or ABS resin, to form a storage battery pack. There are many things.

[0005]

As described above, various batteries have been used as drive power supplies for electronic devices such as notebook computers and entertainment robots, but in recent years lithium ion batteries have been used. In general, lithium-ion batteries require a large current for the above-mentioned applications. Therefore, a plurality of unit cells (cells) are connected in series and in parallel to constitute a battery group, and polycarbonate or the like is used. It is often used in the form of a battery pack made of ABS resin.

[0006] The battery pack is provided with a plurality of (eg, two) cells adjacent to each other in a single container, in which case the single cells are usually housed in the container in a close-packed state. It is. This is because, for example, the volumetric efficiency as a storage battery pack is improved. However, since the storage battery pack is hermetically sealed, heat due to the Joule heat of the cells during charging and discharging is trapped in the storage battery pack. Further, when the storage battery pack is built in the electronic device, the temperature inside the electronic device may increase due to the operation of the electronic device, and the ambient temperature of the storage battery pack may significantly increase. Thus, the temperature of the cells in the battery pack changes depending on the charging / discharging current,
Further, it changes depending on the usage state of the electronic device to be stored.

In addition, when the cell is used in an electronic device driven by a large power consumption, the cell is discharged with a large current in a short time, so that the increase in the cell heat becomes remarkable. This tendency is noticeable in non-aqueous electrolyte secondary batteries represented by lithium secondary batteries. The reason is that in non-aqueous electrolyte secondary batteries, the degree of deterioration of the battery due to overcharging and overdischarging is greater than in nickel-cadmium batteries, nickel-hydrogen batteries, lead-acid batteries, etc., in which the electrolyte is an aqueous solution. And the like.

In general, in the case of a lithium ion secondary battery, when the temperature is increased, the charging efficiency is reduced, the capacity of the cell is reduced, and the cycle life of charging and discharging is also reduced. Therefore, the rise in the temperature in the storage battery pack causes such a problem in a cell such as a lithium ion secondary battery to be stored.

Accordingly, the present invention has been made in view of the above circumstances, and has as its object to provide a battery and a battery element storage case that can suppress a rise in temperature inside a storage battery pack.

[0010]

In order to solve the above-mentioned problems, a battery according to the present invention has a battery element, an inner surface shape accommodating the battery element, and conforming to an outer surface shape of the battery element. A battery housing, and a high thermal conductive member interposed between the inner surface of the battery housing and the outer surface of the battery element and in which the inner surface of the battery housing and the outer surface of the battery element are in contact.

In the battery having such a configuration, the battery element is housed in the battery housing in a state where the battery element is in contact with the high heat conductive member that is in contact with the battery housing. Thus, the heat generated by the battery element is transmitted to the battery housing via the high thermal conductive member, and is radiated to the outside from the battery housing.

Further, a battery element storage case according to the present invention houses a battery element to solve the above-mentioned problem.
A battery housing portion having an inner surface shape along the outer surface shape of the battery element; and an inner surface of the battery housing portion interposed between the inner surface of the battery housing portion and the outer surface of the battery element. And a high thermal conductive member that is in contact with the outer side surface of the heat conductive member.

In the battery element storage case having such a configuration, the battery element is stored in the battery storage section in a state in which the battery element is in contact with the high heat conductive member that is in contact with the battery storage section.
Thus, the heat generated by the battery element is transmitted to the battery housing via the high thermal conductive member, and is radiated to the outside from the battery housing.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. In this embodiment, the present invention is applied to a battery. 1 to 3 show the configuration of the battery.

The batteries are roughly classified into two battery elements (hereinafter, referred to as cells) 10 and 20 and two cells 1
And a storage case 30 for storing 0,20. This battery is a so-called storage battery pack having such a configuration. Then, as shown in FIG. 3, in the storage battery pack, the two cells 10 and 20 and the storage case 30 are adhered by an adhesive 50.

In such a configuration of the storage battery pack,
The storage case 30 includes two cells 10, which are battery elements,
20 and the outer surfaces 10b, 20b of the cells 10, 20
It is a battery storage part having an inner surface shape along the shape of
The adhesive 50 is provided between the inner surface of the storage case 30 and the cells 10 and 2.
This is a high thermal conductive member that is interposed between the outer surfaces 10b and 20b and contacts the inner surface of the storage case 30 and the outer surfaces of the cells 10 and 20. Hereinafter, the components of the storage battery pack will be specifically described.

The cells 10 and 20 are non-aqueous electrolyte secondary batteries represented by, for example, lithium ion batteries which can be repeatedly charged and discharged. The shape of the cells 10 and 20 is a so-called round cell having a substantially cylindrical shape. And cell 1
The reference numerals 0 and 20 are provided side by side in the storage case 30. These two cells 10 and 20 constitute a so-called battery module in the storage battery pack. Hereinafter, the term “battery module” refers to two sets of cells 10 and 20.

As shown in FIGS. 1 and 2, the storage case 30 has a substantially rectangular box shape. The storage case 30 is made of, for example, polycarbonate or ABS resin, and serves as a frame or a housing that forms a storage space for the above-described battery module.

The thickness of the storage case 30 is slightly larger than the diameter of the cell. In addition, the width of the storage case 30 in the short side direction is the same as the cell 1 in the state of being installed as described above.
The width is slightly larger than the width of 0,20. The length of the storage case 30 in the longitudinal direction is slightly larger than the lengths of the cells 10 and 20. For example, by adopting such a shape of the storage case 30, volume efficiency is achieved.

In the thickness direction, the storage case 30 includes a first case member 30a and a second case
And the case member 30b. For example, the first case member 30a and the second case member 30b can be configured to be connected by a so-called snap-fit, so that once assembled, they cannot be easily disassembled.

The storage case 30 has a shape conforming to the shapes of the outer surfaces 10a and 20a of the two cells 10 and 20 whose inner surfaces are housed side by side.
That is, the inner surface of the main surface of each of the first case member 30a and the second case member 30b constituting the storage case 30 has a curvature substantially similar to the curvature of the outer surfaces 10a, 20a of the cells 10, 20. It is shaped. Thereby, a part of the outer peripheral surfaces 10a, 20a of the two cells 10, 20 and a part of the inner surfaces of the first and second case members 30a, 30b are brought into a state of being in close contact. .

As shown in FIGS. 1 and 2, the first case member 30a of the storage case 30 has a main surface 3a.
Window 30a ₁ of the heat radiation to 0a ₁ is formed. Specifically, the window portions 30a ₁ can be a so-called damascene,
Each of the cells 10 and 20 is formed in a shape along the outer surface shape. Then, this is the window portion 30a _1, the opening 30a ₁₁ of generally rectangular shape is formed with a plurality, the plurality of openings 30a ₁₁ are positioned are fixed distance in the longitudinal direction of the main surface to each other Therefore, the entire shape is substantially a lattice shape.

Further, the first and second case members 30a, 30a,
The 30b, an opening portion for face the later-described connector 38 to the outside is formed by a part _30a 2, 30b ₂ formed by cutting which is formed in the peripheral wall of the case members 30a, 30b.

The storage case 30 is shaped as described above. The storage case 30 includes components for charging and discharging the battery module. Specifically, the storage battery pack is a component of the battery module 2
In the state where the cells 10 and 20 are provided side by side, a configuration is adopted in which the electrical connection state is a series connection, and the two cells 10 and 20 are arranged by a constituent member arranged in the storage case 30. Are realized in series.

In the storage case 30, two cells 10,
As shown in FIGS. 1 and 2, a plurality of tabs 31, 33, 34, lead wires 35, a wiring board 32, and the like, which are flat electric wires, are provided to connect the 20 in series.

Here, in a state where the two cells 10 and 20 are arranged as shown in FIG. 1, the cell 10 described on the near side is referred to as a first cell 10 and described on the far side. The cell 20 that has been set is referred to as a second cell 20.

The first tab 31 is brought into contact with one of the electrode terminals (not shown) of the second cell 20 (here, the negative terminal, which will be described below with reference to this). The first tab 31 includes a contact portion 31a that contacts a negative electrode terminal (not shown) of the second cell 20, and a wiring board connection portion 31b. The wiring board connection portion 31b is connected to the wiring board 32 and the connector 3 attached to the wiring board 32
8 and an electrical connection is made. Here, the connector 38
Is, for example, a so-called 6P connector.

With such a configuration, the negative terminal (not shown) of the second cell 20 is brought into contact with the contact portion 31a of the first tab 31, and the wiring board connection portion 31b is electrically connected to the connector 38 on the wiring board 32. Connected to the second cell 20
(Not shown) is electrically connected to the connector 38.

The wiring board 32 has a substantially flat plate shape.
The structure is such that members attached to the wiring board 32 are electrically connected appropriately. A connector 38 is attached to the front side of the wiring board 32. The first tab 31 and the like are attached from the back side of the wiring board 32. For example, the wiring board 32 is provided with wiring for electrically connecting the wiring board connecting portion 31b and the connector 38 as described above. In addition, on the back side of the wiring board 32, the insulating material is insulated from the adjacent second cell 20.
An insulating member 40 is provided.

The second tab 33 connects the positive terminal 20a of the second cell 20 to the negative terminal (not shown) of the first cell 10. For this reason, the second tab 33 is connected to the second cell 20.
A first contact portion 33a contacting the positive electrode terminal 20a of
The second cell contacting a negative electrode terminal (not shown) of the first cell 10
And a connecting portion 33c for integrating the first contact portion 33a and the second contact portion 33b. Thereby, the second tab 33 is connected to the positive terminal 20 a of the second cell 20 and the negative electrode (not shown) of the first cell 10 in the first cell 10 and the second cell 20 provided in the storage case 30. Enables electrical connection with terminals.

The second tab 33 is provided on the first contact portion 3.
The mounting portion 33d is fixed to the wiring board 32 so as to be fixedly disposed in the storage case 30.

The third tab 34 is connected to the first cell 10.
And a connecting portion 34b to which one end of the lead wire 35 is connected. One end of the lead wire 35 connected to the third tab 34 is connected to the wiring board 32 at the other end.

Thus, the positive electrode terminal 1 of the first cell 10
0a is brought into contact with the contact portion 34a of the third tab 34, and the lead wire 35 connected to the third tab 34 is electrically connected to the connector 38 on the wiring board 32. The ten positive electrode terminals 10 a are electrically connected to the connector 38.

By having the above components, 2
The cells 10 and 20 are connected in series, and charging and discharging via the connector 38 can be performed.

That is, the positive electrode terminal 10 of the first cell 10
a is electrically connected to the connector 38 on the wiring board 32 by the lead wire 10. On the other hand, the positive terminal 10a
Is electrically connected to the wiring board 32,
The negative terminal (not shown) is electrically connected to the positive terminal 20 a of the second cell 20 by the second tab 33. Further, the negative terminal (not shown) of the second cell 20 is electrically connected to the connector 38 on the wiring board 32 by the first tab 31. Thereby, the pair of electrode terminals of the battery module including the two cells 10 and 20 are connected to the connector 38.
Can be inserted to allow the external connection. And, by being made externally connectable, the battery module of the storage battery pack can be charged and discharged with externally connected devices.

As described above, in the storage battery pack, the first cell 10 and the second cell 20 are connected in series to form a battery module, and charging and discharging of the battery module is performed via the connector 38. . The configuration of the battery pack that allows the battery module to charge and discharge has been described above. Further, the battery module also has the following configuration.

An insulating plate 36 is provided to prevent the third tab 34 from coming into contact with portions other than the positive electrode terminal 10a in the first cell 10. Similarly, the second tab 3
3 is provided with an insulating plate 37 for preventing the first cell 10 from coming into contact with parts other than the negative electrode terminal (not shown).

The storage battery pack further includes a separator 39 between the first cell 10 and the second cell 20 for electrically separating the first cell 10 and the second cell 20 from each other. I have. Also, the main surface 30b _{1 of} the second case member 30b
Is provided with a name plate 41.

In the storage case 30, the positive electrode terminal 1 of the first and second cells 10, 20 is stored in the storage case 30.
The reinforcing plate 41 is arranged at a position corresponding to 0a and 10b. The contact portion 3 of the third tag 34 is attached to the reinforcing plate 42.
4a and the first contact portion 33a of the second tag 33 are attached.

Further, in the battery pack, between the first and second cells 10 and 20 and the window portion 30a ₁ which is formed on the main surface of the first case member 30a, the label 40 is disposed I have. As described above, the window 30a is an opening having a substantially lattice shape, and the label 40 is provided such that the surfaces of the first and second cells 10, 20 are directed outward through the window 30a1. Prevents direct exposure. This is, for example, to prevent danger.

As shown in FIG. 3, the storage battery pack is filled with an adhesive 50 made of a material having high thermal conductivity between the first and second cells 10 and 20 and the storage case 30. . Thereby, the first and second cells 10, 20
The contact state between the storage case 30 and the storage case 30 is good. Specifically, an adhesive 50 is filled between the first and second cells 10 and 20 and the label 40 to form the first and second cells.
The first and second cells 10, 20 are adhered to the label 40 and the first and second cells 10, 20 through the label 40, so that the thermal contact with the storage case 30 is improved. Further, the adhesive has an electrical insulating property in addition to the property of high thermal conductivity.

By the way, as described above, the storage case 3
Reference numeral 0 indicates that the inner surface has a shape that conforms to the external shape of the battery module, and the storage case 30 and the battery module are in close contact with each other. However, the curvature of the outer periphery of the cell and the curvature of the inner surface of the storage case 30 may not coincide with each other, and in consideration of such a case, the bonding between the first and second cells 10 and 20 and the storage case 30 is performed. By filling the agent 50 in advance, cells 10 and 2 can be
By bringing the storage case 30 into close contact with the storage case 30, a state in which there is no air layer can be created. FIG. 4 shows an extreme example of such a case. For example, as shown in FIG. 4, even if the main surface 30 ₁ of the storage case 30 as being a flat plate shape, the adhesive 50 between the cells 10 and 20 and the storage case 30 is changed flexibly From cells 10, 20
And the storage case 30 can be brought into close contact with each other as much as possible.

As a result, in the storage battery pack, the battery module and the storage case 30 are brought into close contact with the adhesive 50, while the adhesive 50 is made of a high thermal conductive material. Heat generated by the storage case 20 without passing through a gap (air layer).
The heat generated from the battery module can be quickly and easily radiated to the outside of the storage pack 30. Thereby, the storage battery pack can prevent cell characteristics from deteriorating due to an increase in cell temperature,
For example, a decrease in the cycle life of the battery module can be reduced.

Further, as described above, the storage case 30
Part by providing a window portion 30a ₁ of this because it serves as a vent channel, it is possible to further improve the heat radiation efficiency of the battery pack.

Further, since the adhesive has an electrical insulating property, for example, it is possible to insulate the first cell 10 and the second cell 20 without newly providing an insulating sheet or the like. it can.

In the structure of the storage battery pack, since the battery module is stored in the storage case 30, for example,
The reliability of preventing the fall strength of the battery pack and the prevention of foreign matter from entering the battery pack is the same as that of the conventional battery pack, and it has a great effect in practical use for electronic equipment that frequently changes the battery pack. Can be

Further, since the structure for heat dissipation as described above can be realized as a simple structure, the battery pack can be designed at the same cost as a conventional battery pack.

In addition, the storage case 30 may be provided with a metal member so as to radiate the heat of the battery module to the outside. For example, the metal member includes an aluminum flat plate. Specifically, the storage case 30 is formed integrally with an aluminum flat plate by insert molding. In addition, for example, the disposition position of the aluminum flat plate is set to a position where the battery module can directly contact.

By using a metal material having a higher thermal conductivity than the storage case 30 for the storage case 30 as described above, the heat generated by the battery module is transferred to the storage case 3.
Heat can be efficiently radiated outside zero.

In the above-described embodiment, by filling the space between the battery module and the storage case 30 with an adhesive made of a material having a high thermal conductivity, Joule heat generated by the battery module is transmitted to the storage case 30. Let me. However, the member having the high thermal conductivity is not limited to using an adhesive, and other members can be used.

For example, a sheet member (for example, a high heat conductive sheet) made of a material having a high heat transfer coefficient may be arranged between the battery module and the storage case 30. Also,
Further, such a sheet member may be an elastic body (for example, a rubber plate). For example, as such a sheet member, a so-called heat dissipation silicon sheet may be mentioned.

With such a sheet member, as in the case described above, the thermal adhesion between the battery module and the storage case 30 is improved, and the heat generated by the battery module is efficiently transmitted to the storage case 30. Can be.

Next, an embodiment will be described. In this example,
A comparison is made between a battery pack to which the present invention is applied and a conventional battery pack. The storage battery pack to which the present invention is applied in the embodiment contains two cells. In the storage battery pack to which the present invention is applied, a heat dissipation silicon sheet (for example, 40 mm × 30 mm × 1 mm) is arranged between the battery module and the storage case 30. Then, an aluminum flat plate (for example, 40 mm x 30 mm)
(mm × 0.6mm). On the other hand, the conventional battery pack in comparison with this does not include a silicon sheet and an aluminum flat plate. The conditions of the example are shown in Table 1 below.

[0054]

[Table 1]

In the comparative study, specifically, the comparative study is made on the temperatures at various points in each battery pack. Temperature measurement points are three places on the surface of each cell, the ambient gas temperature (air temperature) of the storage battery pack (inside the storage case), and the surface of the storage battery pack. Temperature measurement is performed with a thermocouple. Further, after the charged storage battery pack is exposed to the measurement environment temperature shown in Table 1 for one hour, discharge is started to start temperature measurement.

FIGS. 5 and 6 show the results of the temperature measurement.
FIG. 5 shows a measurement result of the storage battery pack to which the present invention is applied. FIG. 6 shows a measurement result of a conventional storage battery pack. 5 and 6 show changes over time of various values during discharging and charging. Specifically, the current value of the battery pack, the voltage value of the battery pack, the temperature inside the battery pack, the surface temperature of the storage case, the cell surface temperature, and the C of the electronic device that stores the battery pack.
5 shows a change in the surface temperature of PU.

As shown in FIGS. 5 and 6, for example,
The storage battery pack to which the present invention is applied and the conventional storage battery pack qualitatively agree with time-dependent changes in discharging various values. However, the conventional storage battery pack has a larger value at the time of discharging for each of the temperature inside the storage battery pack, the surface temperature of the storage case, and the cell temperature.

Tables 2 and 3 show the results of other comparative studies. Tables 2 and 3 show the maximum temperature and the difference temperature obtained by subtracting the measurement start temperature from the maximum temperature (maximum temperature-measurement start temperature (° C.)) for each battery pack. The maximum temperature is, for example, the temperature when the discharge is completed (discharge end voltage (6 V)). The reason why the comparative study is performed using the temperature at the time when the discharge is completed is that the comparative study is difficult because the cell temperature continues to rise during the discharge period. Table 2 shows the temperature measurement results of the battery pack to which the present invention is applied, and Table 3 shows the temperature measurement results of the conventional battery pack.

[0059]

[Table 2]

[0060]

[Table 3]

As is clear from Tables 2 and 3, the temperature of the storage battery pack to which the present invention is applied is lower due to better heat radiation characteristics. For example, comparing the cell surface temperature with the value of the difference temperature (maximum temperature−measurement start temperature (° C.)), the storage battery pack to which the present invention is applied is 6 ° C. lower.

As can be seen from the results of the various comparative studies described above, a silicon sheet is disposed between the battery module to which the present invention is applied and the storage case, and the storage battery pack is provided with an aluminum flat plate in the storage case. Has better heat dissipation characteristics.

Next, a case where the above-described storage battery pack is mounted on an electronic device will be described. For example, a description will be given of a robot apparatus that uses a storage battery pack as a driving power source for moving or the like as an electronic apparatus. 7 and 8
Shows a specific configuration of the robot apparatus.

As shown in FIGS. 7 and 8, the robot device is a so-called pet type robot having a shape imitating a "dog", and has leg units 3A, 3B, 3C, 3 3D is connected, and a head unit 4 and a tail unit 5 are connected to a front end and a rear end of the body unit 2, respectively. The robot apparatus 1 determines an action in accordance with external information or an internal state, and controls the driving of the leg units 3A, 3B, 3C, and 3D based on the determination to autonomously act. can do.

In such a robot apparatus 1, the body unit 2 is connected to the storage battery pack 6 as a power source.
Is stored. Specifically, the storage battery pack 6 is detachably attached to the body unit 2 at a portion (hereinafter, referred to as an abdomen) 2a which is an antinode, as indicated by a two-dot broken line in FIG. When the storage battery pack 6 is mounted, the connector 38 shown in FIG. 1 is electrically connected to a connector (not shown) in the robot apparatus 1 so that current can be supplied to the robot apparatus 1. become.

The operation of the robot apparatus 1 causes the battery module of the storage battery pack 6 to be discharged. However, since the heat dissipation characteristics are good, the temperature rise of the battery module can be suppressed. Furthermore, for example, even if the temperature inside the robot device 1 rises due to the heat generated by the operation of the motor, the CPU, and the like provided in the robot device 1, the storage battery pack 6 has good heat radiation characteristics, and thus has an effect on the temperature rise in the surrounding environment. Without increasing the temperature of the battery module.

By utilizing natural convection, a heat radiation effect can be expected. In particular, by arranging the main surface portion (the window portion shown in FIGS. 1 and 2) serving as the heat radiating portion of the storage battery pack in the electronic device so as to face in the lateral direction, the main surface portion of the battery pack can be naturally activated. Convection can be generated to increase the efficiency of heat transfer. Thereby, the temperature rise of the battery module can be suppressed.

That is, for example, in a state where the robot apparatus 1 is in a standing posture in a normal use state, the mounting of the storage battery pack 6 on the abdomen 2a of the robot apparatus 1 is performed in such a manner that the main surface of the storage battery pack 6 is moved sideways. A similar effect can be obtained if it is oriented. As described above, if the flow of the air flow inside the electronic device is effectively used, the heat radiation efficiency of the storage battery pack 6 can be increased.

In the above-described embodiment, the robot device is described as an example of the electronic device using the storage battery pack as a drive source. However, it is needless to say that the storage battery pack is not limited to the use in the robot device. Absent. For example, the storage battery pack can be used as a power source for a notebook computer, a so-called camcorder, a disk player, and the like.

In the above-described embodiment, the present invention
The present invention was applied to a storage battery pack including two cells (battery modules) and a storage case. However, the present invention is not limited to this, and the present invention can be applied to a storage case. That is, the present invention can be applied to a storage case in which the battery module is detachable. In this case, the storage case is provided with a member formed of a material having high thermal conductivity, for example, an elastic seed member. In addition, the above-described window portion is also formed in the storage case. With this configuration, even when the battery module is detachable, the battery module comes into close contact with the above-described elastic sheet member disposed in the storage case in the stored state, so that the battery Heat generated by the module
Heat can be efficiently radiated to the outside via the elastic sheet member and the storage case.

Further, in the above-described embodiment, the case where the battery module is constituted by two cells in the battery pack is described. However, the present invention is not limited to the structure in which the battery pack includes two cells. For example, the number of cells is determined according to specifications and the like. Further, a structure in which only one large-sized cell is stored in the storage case may be used.

In the above-described embodiment, the case where the arrangement of the two cells is arranged in parallel has been described. However, the present invention is not limited to this, and different arrangements such as a serial arrangement may be used.

[0073]

The battery according to the present invention has a battery element, a battery housing section for housing the battery element and having an inner surface shape along the outer surface shape of the battery element, an inner surface of the battery housing section and the battery. The battery element is brought into contact with the battery housing part by being provided between the outer surface of the element and the high thermal conductive member in which the inner surface of the battery housing part and the outer surface of the battery element are in contact with each other. The battery is housed in the battery housing in a state of being in contact with the high heat conductive member, whereby the heat generated by the battery element is transmitted to the battery housing via the high heat conductive member and radiated to the outside from the battery housing. be able to.

Further, the battery element storage case according to the present invention houses a battery element, and has a battery storage section having an inner surface shape along the outer surface shape of the battery element, an inner surface of the battery storage section and the battery element. A high heat conductive member interposed between the outer surface of the battery and the inner surface of the battery accommodating portion and the outer surface of the battery element being in contact therewith. It is housed in the battery housing as being in contact with the conductive member, whereby the heat generated by the battery element is transmitted to the battery housing via the high thermal conductive member, and radiated from the battery housing to the outside. Can be.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a storage battery pack according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of the storage battery pack described above.

FIG. 3 is a cross-sectional view illustrating a configuration of the storage battery pack described above.

FIG. 4 is a cross-sectional view showing a state of an adhesive filled between two cells and a storage case in the storage battery pack.

FIG. 5 is a characteristic diagram showing a temperature measurement result of the storage battery pack described above.

FIG. 6 is a characteristic diagram showing temperature measurement results of a conventional storage battery pack to be compared.

FIG. 7 is a perspective view illustrating an external configuration of a robot device to which power is supplied by the storage battery pack.

FIG. 8 is a bottom view showing the abdomen of the robot device with the above-described storage battery pack mounted.

[Explanation of symbols]

 10, 20 cells, 30 storage cases, 50 adhesive

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Katsuyuki Kuribayashi, Inventor 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Takashi Ietoku 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo No. Sony Corporation F term (reference) 5H040 AA28 AS11 AS14 AS15 AT01 AY04 AY08 CC28 CC32 LL00

Claims (20)

[Claims] 1. A battery element, a battery accommodating portion accommodating the battery element, and having an inner surface shape along an outer surface shape of the battery element, an inner surface of the battery accommodating portion, and an outer surface of the battery element. A battery, comprising: a high thermal conductive member interposed between a side surface and an inner surface of the battery housing and an outer surface of the battery element in contact with the battery housing. 2. The battery device according to claim 1, further comprising a plurality of the battery elements, wherein the battery accommodating portion accommodates the battery elements arranged in close proximity to each other, and has an inner surface shape along the outer surface shape of the battery elements arranged in close proximity. 2. The method according to claim 1, wherein
The battery as described. 3. The battery according to claim 1, wherein the high thermal conductive member is an adhesive member made of a high thermal conductive material that adheres to an inner surface of the battery housing and an outer surface of the battery. 4. The battery according to claim 1, wherein the high thermal conductive member is a flexible member or an elastic member formed of a high thermal conductive material. 5. The battery according to claim 1, wherein the high heat conductive member is made of an electrically insulating material. 6. The battery according to claim 1, wherein the battery housing further includes a heat radiating portion for radiating internal heat to the outside. 7. The battery according to claim 6, wherein the heat radiating portion is a metal member insert-molded in the battery housing portion. 8. The battery according to claim 7, wherein said metal material is aluminum. 9. The battery according to claim 1, wherein the battery housing portion is formed in a substantially box shape by joining two substantially dish-shaped members. 10. The battery according to claim 1, wherein a plurality of substantially strip-shaped openings are arranged and a substantially lattice-shaped window is provided. 11. A battery accommodating portion for accommodating a battery element and having an inner surface shape along the outer surface shape of the battery element, and between the inner surface of the battery accommodating portion and the outer surface of the battery element. A battery element storage case, comprising: a high heat conductive member interposed between the inner surface of the battery storage portion and the outer surface of the battery element. 12. A plurality of the battery elements are housed, and the battery housing section houses battery elements arranged in close proximity to each other, and has an inner surface along an outer surface shape of the battery elements arranged in close proximity to each other. 2. A shape having a shape.
2. The battery element storage case according to 1. 13. The battery element storage case according to claim 11, wherein the high heat conductive member is an adhesive member made of a high heat conductive material that is bonded to an inner surface of the battery housing and an outer surface of the battery. . 14. The battery element storage case according to claim 11, wherein the high thermal conductive member is a flexible member or an elastic member formed of a high thermal conductive material. 15. The battery element storage case according to claim 11, wherein the high heat conductive member is made of an electrically insulating material. 16. The battery element storage case according to claim 11, wherein said battery storage portion further includes a heat radiating portion for radiating internal heat to the outside. 17. The battery element storage case according to claim 16, wherein the heat radiating section is a metal member insert-molded in the battery storage section. 18. The battery element storage case according to claim 17, wherein the metal material is aluminum. 19. The battery element storage case according to claim 11, wherein the battery storage section is formed in a substantially box shape by joining two substantially dish-shaped members. 20. The battery element storage case according to claim 11, wherein a plurality of substantially strip-shaped openings are arranged and a substantially lattice-shaped window is provided.