JP4940490B2 - battery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery, and more particularly to a battery in which a heat radiating member is fixedly disposed at a terminal portion.
[0002]
[Prior art]
In recent years, electric vehicles such as electric vehicles and hybrid vehicles have been actively developed. As a power source for driving this electric vehicle, there is an increasing demand for a secondary battery excellent in performance, reliability, and safety.
[0003]
In these electric vehicles, the driving power source is required to have a high electromotive force and energy amount. In order to obtain a high electromotive force and energy amount, a battery in which a large number of battery cells that have a positive electrode and a negative electrode and cause an electrode reaction are connected in series or in parallel is used as the driving power source. This battery is normally enclosed in a state where a large number of battery cells are isolated from each other in an integral container. A battery having such a structure is called a monoblock battery, and many proposals have been made.
[0004]
Further, when discharging with a large current, the battery cell generates heat due to the electrode reaction of the positive electrode and the negative electrode. Due to this heat generation, the battery cell is overheated, the positive electrode and / or the negative electrode are damaged by heat, and the performance of the battery is lowered. For this reason, the battery has required heat dissipation measures for the purpose of preventing the livestock heat of the battery against heat generated by a large current.
[0005]
An example of a battery with a heat dissipation measure is disclosed in Japanese Utility Model Publication No. 61-39860.
[0006]
Japanese Utility Model Laid-Open No. 61-39860 discloses a battery having a through-hole through which air circulates in a partition wall separating battery cell chambers of a battery container of a monoblock battery. In this battery, the partition wall is cooled by the air circulating through the through hole of the partition wall, and the electrode body housed in the battery cell chamber partitioned by the partition wall can be cooled in a wide area.
[0007]
However, since the space of the through-hole and the partition wall portion need to have a thickness of two layers across the through-hole, there is a disadvantage that a large space for the partition wall portion is required, resulting in poor battery mounting efficiency. there were.
[0008]
Japanese Patent Application Laid-Open No. 10-144266 discloses a battery including a battery container having an outer wall and an inner wall in which metal parts are coated with a resin, in a battery container of a monoblock battery.
[0009]
This battery container can efficiently transfer heat to the surroundings by the parts made of metal parts, but heat conduction from the electrode body to the metal parts and heat conduction from the outer wall of the container to the outside Since it is performed through the resin part, in order to obtain sufficient heat dissipation, it is necessary to form the resin part very thin, and there is a problem that there is a difficulty in forming the container.
[0010]
[Problems to be solved by the invention]
This invention is made | formed in view of the said actual condition, and makes it a subject to provide the battery which is not easy to raise the temperature inside a battery container while being excellent in mounting property and productivity.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present inventors have studied a battery that can dissipate internal heat, and as a result, have found that the above-described problems can be solved by arranging a heat-dissipating member in the terminal portion of the electrode terminal. .
[0012]
That is, the battery of the present invention is a battery having at least a positive electrode and a negative electrode inside, and an electrode terminal having a terminal portion joined to each of the positive electrode and the negative electrode and protruding from the battery container. a state between the surface and spacing of the containers, and in the connected state between the terminal portion, have a fixedly positioned radiating member in the terminal portion, the heat radiating member, an external circuit electrically connected to the positive terminal parts and the negative terminal portion is characterized that you have at least electrically insulated.
[0013]
In the battery of the present invention, the heat dissipating member is fixedly disposed at the terminal portion of the electrode terminal, whereby the heat inside the battery is transmitted from the terminal portion of the electrode terminal to the heat dissipating member, and the heat dissipating is performed in this heat dissipating member. The heat inside the battery is dissipated from the heat radiating member, so that a decrease in battery performance due to overheating is suppressed. As a result, the battery of the present invention can have high performance and long life.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The battery of the present invention is a battery having a battery container that encloses at least a positive electrode and a negative electrode, and an electrode terminal that is joined to each of the positive electrode and the negative electrode and has a terminal portion protruding from the battery container. As long as the battery of the present invention has such a configuration, any battery may be used. That is, it may be a primary battery or a secondary battery, and may be any type of battery such as a lead storage battery, a Ni-Cd battery, a Ni-MH battery, or a lithium battery. Further, the shape of the battery is not particularly limited, and may be a cylindrical battery or a rectangular battery.
[0015]
The battery of the present invention has a heat dissipation member fixedly disposed on the terminal portion. That is, heat generated from the positive electrode and the negative electrode inside the battery is transmitted to the heat radiating member via the terminal portions of the joined electrode terminals, and this heat is radiated to the outside air by the heat radiating member. For this reason, in the battery of the present invention, heat generated from the positive electrode and the negative electrode inside the battery does not stay inside the battery container, and the positive electrode and the negative electrode are prevented from being damaged by heat.
[0016]
In the battery of the present invention, it is preferable that the heat dissipating member is fixedly disposed on the terminal portion in a state where the heat radiating member is spaced from the surface of the battery container. That is, the heat transmitted to the heat dissipation member is dissipated without being transmitted to the battery container by disposing the heat dissipation member at a distance from the surface of the battery container. In addition, by providing a gap between the heat dissipation member and the battery container, heat is radiated from the battery container surface to the outside air.
[0017]
The heat dissipating member is preferably a member fixedly arranged on a plurality of terminal portions protruding in the same direction. That is, the fact that the heat dissipation member is an integral member fixed to the plurality of terminal portions means that the heat dissipation member is fixed at a plurality of locations, and the heat dissipation member is firmly fixed. Moreover, it shows that it has a large surface area so that a heat radiating member is fixed in several places, and the heat dissipation of a heat radiating member improves.
[0018]
The battery of the present invention preferably has a plurality of battery cells each having a positive electrode and a negative electrode. By having a plurality of battery cells, a battery having a plurality of terminal portions can be obtained. Moreover, the battery performance can be improved by connecting the terminal parts of a plurality of battery cells in series or in parallel. Here, the battery cell indicates a member that has at least a positive electrode and a negative electrode and can form electric power by an electrode reaction. Examples of the battery cell include an electrode body such as a lithium battery.
[0019]
It is preferable that at least a part of the end surface of the terminal portion is in contact with the heat radiating member. That is, by bringing the heat radiating member into contact with the end surface of the terminal portion, the contact area between the terminal portion and the heat radiating member is widened, and heat is transferred from the terminal portion to the heat radiating member with higher efficiency. Here, the end surface of the terminal portion does not indicate only the end surface of the tip of the terminal portion, but includes an end surface of a member thermally conductively connected to the electrode terminal protruding from the battery container. For example, a fixing member or the like for fixing the electrode terminal to the battery container can be used.
[0020]
In the heat dissipation member, it is preferable that a positive electrode terminal portion and a negative electrode terminal portion that are electrically connected to an external circuit are at least electrically insulated. That is, since the positive electrode terminal portion and the negative electrode terminal portion are insulated, electric power can be supplied to an external circuit to which the battery is connected without causing a short circuit in the heat dissipation member. Here, the positive terminal portion and the negative terminal portion are at least electrically insulated from each other when the battery of the present invention has a plurality of terminal portions, a pair of terminal portions that are electrically connected to an external circuit. In addition to the electrical insulation state, the other terminal portions are also electrically insulated from the terminal portions other than the desired counterpart terminal portion.
[0021]
For example, in a battery having a plurality of battery cells, the battery cells are electrically connected in series or in parallel. At this time, the battery cells are usually connected by connecting terminal portions provided in the respective battery cells. For this reason, in the battery of the present invention, when the heat dissipating member is fixedly disposed on the plurality of terminal portions, the insulation between the cells other than the connection of the terminal portions for connecting the battery cells is maintained electrically. Yes.
[0022]
The heat dissipating member preferably electrically connects desired terminal portions to each other. By connecting the heat dissipation members between the terminal portions, no extra wiring member is required for the electrical connection of the battery cells, and the cost and necessary space required for the assembly and assembly of the battery of the present invention are eliminated. Can be reduced.
[0023]
The heat radiating member is preferably a heat radiating plate. By using the heat radiating member as the heat radiating plate, the surface area of the heat radiating member can be increased, and the heat transmitted from the terminal portion can be efficiently radiated.
[0024]
It is preferable that a heat sink has a convex part protruded from the surface. That is, by providing a convex portion on the surface of the heat radiating plate, the surface area of the heat radiating plate can be increased, and the heat transmitted from the terminal portion can be efficiently radiated.
[0025]
It is preferable that the convex portion protrudes in the same direction as the direction in which the terminal portion protrudes. The same direction as the protruding direction of the terminal portion is a direction in which the tip end portion of the convex portion is separated from the battery container. In other words, the protrusion protrudes, so that the heat radiated from the heat radiating plate is easily diffused to the outside air.
[0026]
It is preferable that a plurality of convex portions are provided. By having a plurality of convex portions, the surface area of the heat radiating plate can be increased, and the heat transferred from the terminal portion can be efficiently dissipated.
[0027]
It is preferable that a convex part consists of a protrusion. That is, by forming the convex portion with the protrusions, the heat radiating fins are formed on the surface of the heat radiating member, and the heat radiating property of the heat radiating member is improved.
[0028]
The convex portion is preferably made of a protrusion. That is, by forming the convex portion with the protrusion, the surface area of the heat radiating member is increased, and the heat radiating property of the heat radiating member is improved.
[0029]
It is preferable that the heat sink has a wave shape. When the heat sink has a wave shape, the surface area of the heat sink increases and the heat dissipation improves.
[0030]
The heat dissipation member is preferably made of resin. Since the resin has high moldability, it can be easily formed into a predetermined shape. Also, the heat dissipation of the battery can be increased without a significant increase in weight due to the light weight of the resin itself. Furthermore, since it has insulation, it can prevent that the terminal part arrange | positioned and fixed short-circuits. Any resin may be used as this resin. For example, general-purpose resins such as polyethylene, polyvinyl chloride, nylon, and ABS can be used. Moreover, you may add fillers, such as glass fiber, an inorganic filler, and a carbon fiber, to these resins as a reinforcing agent.
[0031]
It is preferable that the heat radiating member has a metal member. Since the metal member has better thermal conductivity than the resin, the heat transmitted to the heat radiating member is radiated from the metal member to the outside. For this reason, the heat radiating member which has a metal member is more excellent in heat dissipation than the heat radiating member formed only with the resin member. Examples of the material of the metal member include metals such as aluminum, copper alloy, and iron.
[0032]
A metal member is arrange | positioned at a heat radiating member in the state by which the electrical insulation between the positive electrode terminal part and the negative electrode terminal part was hold | maintained. The material of the metal member is not particularly limited.
[0033]
Further, the metal member may function as a wiring member. That is, when the metal member is used in a portion where the metal member is in contact with the terminal portion of the heat radiating member, the electrical connection of the metal member is used to electrically connect the external terminal or the adjacent terminal portion. By conducting, the electrode bodies can be connected in series or in parallel.
[0034]
Furthermore, since the metal member functions as a wiring member, the number of parts can be reduced and the cost of the battery is also reduced.
The heat radiating member is preferably a combination of a resin and a metal member.
[0035]
In the battery of the present invention, the heat dissipating member is fixedly disposed at the terminal portion of the electrode terminal, whereby the heat inside the battery is transmitted from the terminal portion of the electrode terminal to the heat dissipating member, and the heat dissipating is performed in this heat dissipating member. For this reason, overheating inside the battery is suppressed, and deterioration of battery performance due to overheating is suppressed. For this reason, the battery of this invention shows the effect which can have high performance with a long lifetime.
[0036]
【Example】
Hereinafter, the present invention will be described using examples.
[0037]
As an example of the present invention, a lithium battery having a heat sink was prepared.
[0038]
Example 1
Example 1 is a battery container 3 having a square shape, an electrode body 4 enclosed in the battery container 3, and a terminal portion having one end joined to the electrode body 4 and the other end protruding from the upper surface of the electric container 3. The battery includes a pair of electrode terminals 1 and 2 having 13 and 23, and a heat radiating plate 5 fixed to the pair of terminal portions 13 and 23 in a state of being spaced from the surface of the battery container 3. This battery is shown in FIG. 1 in a sectional perspective view showing the inside of the container.
[0039]
The battery container 3 is a resin case in which a battery cell chamber in which the electrode body 4 is enclosed is partitioned and the battery cell chamber and the outer peripheral shape are formed in a rectangular parallelepiped shape. In addition, the battery container 3 has a through-hole through which the electrode terminals 1 and 2 penetrate at positions corresponding to the electrode terminals 1 and 2.
[0040]
The electrode body 4 is an electrode body in which a positive foil 41 and a negative foil 42 are formed in a flat wound shape with a separator 43 interposed therebetween. The positive electrode foil 41 is a foil in which a positive electrode active material layer 412 is formed on both surfaces of a strip-shaped aluminum foil 413. The negative electrode foil 42 is made of a foil in which a negative electrode active material layer 422 is formed on both surfaces of a strip-shaped copper foil 423. The separator 43 is a porous sheet made of polyethylene or polypropylene that is formed wider than the portion of the positive electrode foil 41 and the negative electrode foil 42 where the electrode active material layers 412 and 422 are formed. Moreover, the positive electrode foil 41 and the negative electrode foil 42 have the edge part in which the active material layer is not formed in the one edge part side of the width direction. The electrode body 4 has projecting end portions 411 and 421 formed from edge portions projecting in opposite directions in the axial length direction of the winding shaft.
[0041]
The pair of electrode terminals 1 and 2 is made of a metal conductor, and is electrically connected to an external circuit on the other end side and shaft portions 11 and 21 joined to the projecting end portions 411 and 421 on one end side. This is a member having terminal portions 13 and 23 and container fixing portions 12 and 22 for fixing to the wall surface portion of the upper surface of the battery case 3. The container fixing parts 12, 22 are formed of flange parts 121, 221 that extend radially outward of the electrode terminals 1, 2, and nut parts 122, 222, and the electrode terminals 1, 2 are wall surface parts on the upper surface of the battery container 3. The electrode terminals 1 and 2 are fixed to the battery container 3 by sandwiching the wall surface part of the battery container 3 between the flange parts 121 and 221 and the nut parts 122 and 222 in a state of passing through the battery container 3. In addition, the electrode terminals 1 and 2 are formed with screw parts 131 and 231 from the flange parts 121 and 221 to the tip part on the other end side in order to be fixed by the nut parts 122 and 222 of the container fixing parts 12 and 22. Yes.
[0042]
In the electrode terminals 1 and 2, the shaft portions 11 and 21 are joined to the outer peripheral surfaces of the protruding end portions 411 and 421 of the electrode body 4. The electrode terminals 1 and 2 are joined to projecting end portions 411 and 421 formed on both end sides of the winding shaft of the electrode body 4 with the other end projecting in the same direction. The electrode body 4 to which the electrode terminals 1 and 2 are joined is shown in FIG.
[0043]
The electrode terminals 1 and 2 are fixed to the battery container 3 by flange portions 121 and 221 and nut portions 122 and 222 through a gasket 6 made of an insulator.
[0044]
The heat radiating plate 5 is made of a plate-like member in which through holes through which the terminal portions 13 and 23 can pass are formed at positions corresponding to the terminal portions 13 and 23 of the electrode terminals 1 and 2. The nuts 7 and 7 were fixed to the terminal portions 13 and 23 in contact with the end surfaces of the nut portions 122 and 222 fixed to the container 3. The nuts 7 and 7 were screwed using the screw parts 131 and 231 similarly to the nut parts 122 and 222. The heat sink 5 was formed of polyethylene.
[0045]
In the battery of this example, when the electrode body generates heat, the heat of the electrode body is transmitted to the shaft portion of the electrode terminal joined to the positive electrode foil and the negative electrode foil constituting the electrode body. That is, the positive foil, the negative foil, and the electrode terminal are metals having good electrical conductivity and excellent thermal conductivity. The heat transmitted to the shaft portion of the electrode terminal diffuses to the electrode terminal and is transmitted to the heat radiating plate joined to the terminal portion. When heat is transmitted to the heat radiating plate, it is radiated from the heat radiating plate to the outside air. For this reason, the battery of a present Example has high heat dissipation. In the battery of this example, since the heat sink is made of resin, the heat sink has an insulating property. For this reason, the short circuit by a heat sink does not arise.
[0046]
(Example 2)
Example 2 is a battery in which six of the batteries of Example 1 are adjacent to each other with terminal portions 13 and 23 projecting in the same direction, and positive electrode terminal portions 13 and negative electrode terminal portions 23 are alternately arranged. It is a battery which has the structure which made the side wall surface closely_contact | adhere. Here, the battery of Example 2 was fixed using a pair of pressing members that press the side wall surface portion of the battery located on the outermost side and a fastening member that fastens the pair of pressing members. It was done by pressing the battery in At this time, the terminal parts 13 and 23 of each battery are the terminal parts of an adjacent battery, and each battery was electrically connected in series by connecting with the terminal part of a predetermined other party. Each battery was connected by screwing a copper alloy plate-like wiring member fitted in the terminal portions 13 and 23. The battery of Example 2 is shown in FIG. Further, in the battery of Example 2, one heat sink 5 is fixed to the terminal portion of each battery.
[0047]
Also in the battery of Example 2, as in the battery of Example 1, the heat inside the battery container is transmitted to the heat radiating plate through the electrode terminals, and is radiated from the heat radiating plate. From this, also in the battery of Example 2, a decrease in battery performance due to overheating of the electrode body is suppressed.
[0048]
Furthermore, since the battery of Example 2 can suppress overheating of each battery, the battery performance is exhibited without loss. That is, in the conventional monoblock type battery, the electrode body arranged on the inner side is difficult to dissipate heat from the container, and the performance is likely to deteriorate due to overheating. In contrast, in the battery of Example 2, the electrode body disposed on the inner side is also sufficiently cooled, so that a decrease in battery performance can be suppressed and the battery performance can be shown.
[0049]
(Example 3)
Example 3 is a battery having a monoblock structure in which a plurality of electrode bodies are enclosed, and having a heat sink 5 at a terminal portion. The battery of Example 3 is shown in FIG.
[0050]
The battery of Example 3 is the same as that of Example 2 except that the battery container 31 having a structure in which the battery containers of the battery of Example 2 are integrally formed is used. That is, the members used in Example 2 were used for the electrode body 4, the electrode terminals 1 and 2, and the heat sink 5. The battery container 31 is a rectangular battery container having a battery cell chamber in which the electrode body 4 is enclosed.
[0051]
In the battery of Example 3, each electrode body is connected in series as in Example 2. For this reason, the arrangement of the positive and negative electrodes of the terminal portions 13 and 23 is arranged so as to be alternately arranged as in the second embodiment. Further, the connection between the terminal portions 13 and 23 was performed in the same manner as in Example 2.
[0052]
Also in the battery of Example 3, since the heat radiation by the heat radiating plate is performed in the same manner as the battery of Example 2, the deterioration of the performance of the electrode body can be suppressed, and the performance as a battery can be shown.
[0053]
Example 4
Example 4 is the same as Example 2 except that a heat radiating plate 52 having a plurality of projections 51 protruding in the direction perpendicular to the surface is the same as the direction in which the terminal portions 13 and 23 protrude on the surface. It is a battery similar to the battery. The battery of Example 4 is shown in FIG.
[0054]
In the battery of Example 4, the heat dissipation of the heat sink 5 is improved by having the protrusions 51 on the surface of the heat sink 5. As a result, the heat of the electrode body can be radiated to the outside with high efficiency through the heat radiating plate.
[0055]
(Example 5)
Example 5 is a battery similar to Example 2 except that a heat radiating plate 53 in which a portion between contact portions with the pair of terminal portions 13 and 23 is curved in a corrugated shape is used. The corrugated plate of the heat radiating plate is formed such that the wave apex does not contact the battery container 3. The battery of Example 5 is shown in FIG.
[0056]
Also in the battery of Example 5, the surface area of the heat radiating plate is increased by making the heat radiating plate corrugated, and heat radiation from the heat radiating plate to the outside is performed with high efficiency. For this reason, the electrode body inside a battery is cooled, and the fall of the performance of a battery is suppressed.
[0057]
(Example 6)
The battery of Example 6 is the same as that of Example 2 except that a heat radiating plate 54 in which the contact portions with the terminal portions 13 and 23 are formed of resin and the other portions are formed of a metal plate is used. The battery of Example 6 is shown in FIG.
[0058]
In detail, the heat dissipation plate 54 used in the battery of Example 6 is formed with a peripheral portion 541 that is a portion in contact with the terminal portions 13 and 23 made of resin, and a metal plate is disposed in a portion 542 between the resin portions. Have a structure. The resin was polyethylene as in Example 1, and the metal plate was copper alloy. The heat radiating plate 54 is provided with insulating properties of the terminal portions 13 and 23 by the resin portion, and the metal plate exhibits high heat radiating properties.
[0059]
In the battery of Example 6, the heat of the electrode body is radiated from the electrode plate as in the other examples. Moreover, since the electrode plate of the battery of a present Example has a metal plate, it shows high heat dissipation. That is, since the metal is more excellent in thermal conductivity than the resin, the heat transferred from the terminal portion to the resin portion is transferred to the metal plate that is more excellent in thermal conductivity. Then, heat is radiated from the metal plate to the outside air.
[0060]
(Example 7)
The battery of Example 7 is the same as that of Example 2 except that the resin heat dissipation plate 55 in which the contact portions with the terminal portions 13 and 23 are made of metal is used. The battery of Example 7 is shown in FIG.
[0061]
As for the heat sink 55 used for the battery of Example 7, the part which contact | abuts the terminal parts 13 and 23 is formed with the metal plate 552, and the other part 551 is formed with resin. Each metal plate 552 is electrically insulated by the resin portion 551. The metal plate 552 and the resin portion 551 were made of the same material as in Example 6.
[0062]
In the battery of Example 7, the heat of the electrode body is immediately transmitted from the terminal part to the metal plate of the contact part. For this reason, the electrode body does not overheat. The heat transmitted to the metal plate is transmitted to the resin portion and is radiated from the resin portion and the metal plate itself to the outside air.
[0063]
(Example 8)
The battery of Example 8 is the same as that of Example 2 except that the heat radiating plate 56 integrally formed with the connection member 562 for connecting the terminal portions is used. The battery of Example 8 is shown in FIG.
[0064]
The heat dissipation plate 56 of the battery of Example 8 corresponds to the terminal portion 13 corresponding to when connected in series among the terminal portions 13 and 23 of the electrode terminals 1 and 2 joined to the electrode body 4 sealed inside. A connection member 562 made of a metal plate for connecting the two members 23 is formed, and the other portion 561 is formed of a resin. Each of the connecting members 562 is electrically insulated by the resin portion 561. The connection member 562 and the resin portion 561 were made of the same material as in Example 6.
[0065]
In the battery of Example 8, as in Examples 1 to 7, the heat sink is arranged at the terminal portion, so that overheating inside the battery is suppressed. Furthermore, since the connection member for connecting the electrode bodies in series is formed integrally with the heat radiating plate, the connection member is not necessary for connecting the terminal portion, the number of parts required for the battery is reduced, and the cost is reduced. be able to.
[0066]
【Effect of the invention】
In the battery of the present invention, the heat dissipating member is fixedly disposed on the terminal portion of the electrode terminal, whereby the heat inside the battery is transmitted from the terminal portion of the electrode terminal to the heat dissipating member, and heat is radiated to the outside in this heat dissipating member. For this reason, overheating inside the battery is suppressed, and deterioration of battery performance due to overheating is suppressed. For this reason, the battery of this invention shows the effect which can have high performance with a long lifetime.
[Brief description of the drawings]
1 is a cross-sectional perspective view of a battery of Example 1. FIG.
2 is a diagram showing the configuration of the electrode body and electrode terminals of the battery of Example 1. FIG.
3 is a perspective view of a battery according to Example 2. FIG.
4 is a perspective view of a battery according to Example 3. FIG.
5 is a perspective view of a battery according to Example 4. FIG.
6 is a perspective view of a battery according to Example 5. FIG.
7 is a perspective view of a battery according to Example 6. FIG.
8 is a perspective view of a battery according to Example 7. FIG.
9 is a perspective view of a battery of Example 8. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Positive electrode terminal 2 ... Negative electrode terminal 3 ... Battery container 4 ... Electrode body 5 ... Heat sink 6 ... Gasket 7 ... Nut

Claims (10)

In a battery having a battery container that encloses at least a positive electrode and a negative electrode inside, and an electrode terminal having a terminal portion that is joined to each of the positive electrode and the negative electrode and protrudes from the battery container,
A state between the surface and spacing of the battery container, and in the connected state between the terminal portion, it has a heat radiating member that is fixedly disposed on the terminal portion,
The heat dissipation member has a battery and a positive electrode terminal part and the negative terminal portion which is electrically connected to an external circuit is characterized that you have at least electrically insulated. In a battery having a battery container that encloses at least a positive electrode and a negative electrode inside, and an electrode terminal having a terminal portion that is joined to each of the positive electrode and the negative electrode and protrudes from the battery container,
In a state of being spaced apart from the surface of the battery container, and in a state where the terminal portions are connected, a heat dissipating member fixedly disposed on the terminal portions,
The battery, wherein the heat dissipation member is made of resin. The heat dissipation member is battery according to claim 1 or 2, wherein a member which is fixedly disposed in a plurality of the terminal portions projecting in the same direction. The terminal portion A battery according to claim 1 or 2, wherein at least part of the end face is the heat dissipation member and the abutment. The battery according to claim 1 or 2, wherein a plurality of said terminal portions. The heat dissipation member is battery according to claim 1 or 2, wherein the heat radiating plate.   The battery according to claim 6, wherein the heat radiating plate has a protruding portion protruding from the surface, and the protruding portion protrudes in the same direction as the protruding direction of the terminal portion.   The battery according to claim 6, wherein the heat radiating plate has a wave shape. The heat dissipation member is battery according to claim 1 or 2, wherein a metal member.   The battery according to claim 1, wherein the heat dissipating member is a combination of a resin and a metal member.

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