CN210326014U

CN210326014U - Flexible package battery and heat dissipation flexible package battery module

Info

Publication number: CN210326014U
Application number: CN201921629785.3U
Authority: CN
Inventors: 王培为; 王易玮; 许瑞; 徐作斌; 徐勇
Original assignee: Dongguan Huiyang Power Technology Co Ltd
Current assignee: Dongguan Huiyang Power Technology Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-04-14
Anticipated expiration: 2029-09-27

Abstract

The utility model belongs to the technical field of the battery, especially, relate to a flexible package battery, including plastic-aluminum composite packaging bag and encapsulate in naked electric core in the plastic-aluminum composite packaging bag, at least one side and/or the base of plastic-aluminum composite packaging bag are provided with the extension, naked electric core passes through the extension dispels the heat. Additionally, the utility model discloses still relate to a heat dissipation flexible packaging battery module, including a plurality of flexible packaging battery, a plurality of the extension of flexible packaging battery coincide in proper order. Compared with the prior art, the utility model discloses a soft-packing battery and heat dissipation soft-packing battery module simple structure directly concentrates the heat dissipation after the heat transfer of extension, and the radiating effect is good, and battery module weight reduction moreover, energy density rises.

Description

Flexible package battery and heat dissipation flexible package battery module

Technical Field

The utility model belongs to the technical field of the battery, especially, relate to a flexible packaging battery and heat dissipation flexible packaging battery module.

Background

The technology of lithium ion batteries is becoming mature, and the battery pack with the soft package battery cell therein is rapidly developed due to the advantages of lightness, thinness, long cycle life, good safety performance, high energy density, stable discharge platform, excellent functional performance, environmental protection, no pollution and the like.

The soft-package battery module can generate heat in the use process, so that heat dissipation is needed. If the heat is not released in time, the service life of the battery is greatly shortened, the use stability of the battery is also greatly reduced, and even potential safety hazards are caused.

Among the prior art, the heat dissipation of electric core in the battery module is now mostly with the fin bonding on electric core surface, conducts the heat of electric core to the assigned position through this fin, then concentrates the heat dissipation again. Because the inside heat that produces of electricity core needs to be in proper order through plastic-aluminum membrane, heat-conducting glue, fin, concentrates together the heat dissipation again, and the heat conduction just can finally concentrate the heat dissipation after multiple medium, and the radiating effect is not obvious, and the module is inside has increased a lot of fin moreover, makes the weight increase of module greatly to energy density has been reduced.

In view of this, it is necessary to provide a heat dissipation structure of a pouch battery module with good heat dissipation and high energy density.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model lies in: aiming at the defects of the prior art, the flexible package battery is provided, and has simple structure and good heat dissipation effect.

The utility model discloses a second of purpose lies in: to the not enough of prior art, and provide a laminate polymer battery module heat radiation structure, simple structure, the radiating effect is good, and battery module weight reduction moreover, energy density rises.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a soft-packing battery, include plastic-aluminum composite packaging bag and encapsulate in naked electric core in the plastic-aluminum composite packaging bag, at least one side and/or the base of plastic-aluminum composite packaging bag are provided with the extension, naked electric core passes through the extension dispels the heat.

A heat dissipation flexible package battery module comprises a plurality of flexible package batteries, and extension parts of the flexible package batteries are sequentially overlapped.

It should be noted that, during the use process of the flexibly packaged battery module, the heat emitted from the flexibly packaged battery is conducted to the extending portions, and then the heat is gathered at the plurality of overlapped extending portions and conducted to the outside of the battery module. On one hand, the heat emitted by the medium-soft package battery is directly gathered and conducted through the extending part without being gathered and conducted through various media, so that the heat dissipation effect is good; on the other hand, the utility model discloses need not to add and establish parts such as fin, simple structure has alleviateed the weight of battery module moreover, has reduced the volume of battery module, has improved the energy density of battery module.

As an improvement of the heat dissipation flexible package battery module, it is a plurality of the extension of flexible package battery all sets up in same side. The heat emitted by the flexible package batteries is conducted to the same side of the battery module in a concentrated manner through the extension part and then conducted to the outside of the battery module, so that the structure is simple, and the heat dissipation effect is good.

As an improvement of the heat dissipation flexible package battery module, a plurality of the extension of the flexible package battery is arranged on the bottom edge. The heat emitted by the flexible package batteries is conducted to the bottom of the battery module in a concentrated manner through the extension parts and then conducted to the outside of the battery module, so that the structure is simple, and the heat dissipation effect is good.

As an improvement of the heat dissipation flexible package battery module, a plurality of extension portions of the flexible package battery are arranged on two side edges simultaneously. The heat emitted by the flexible package batteries is respectively conducted to the two sides of the battery module through the extending parts and then conducted to the outside of the battery module, and the heat is conducted in two directions, so that the heat dissipation effect is better.

As an improvement of the heat dissipation flexible package battery module, it is a plurality of the extension of flexible package battery all sets up in same side and base simultaneously. The heat that distributes out a plurality of soft-packing batteries is conducted respectively to one side of battery module and outside the bottom conducts the battery module again through the extension, has realized the heat conduction in the while of horizontal direction and vertical direction, and the radiating effect is better.

As an improvement of the heat dissipation flexible package battery module, a plurality of extension portions of the flexible package battery are arranged on two side edges and a bottom edge at the same time. The heat that will a plurality of soft-packing batteries distribute out is conducted to the both sides of battery module and outside the battery module again through the extension respectively, has realized diversified heat conduction, and the radiating effect is splendid.

As an improvement of heat dissipation soft-packing battery module, still include the bolster, every n the soft-packing battery is a battery unit, the bolster sets up in adjacent two between the battery unit, n is greater than or equal to 1.

As an improvement of heat dissipation flexible package battery module, the bolster is the thermal-insulated expanded material that thickness is 0.5 ~ 2 mm. Firstly, the heat-insulating foaming material has low hardness and high resilience, and can absorb the bulging stress of the battery to play a role in buffering; secondly, when the battery core sends out thermal runaway, the buffer piece can play a role in heat insulation, inhibit thermal diffusion and delay accidents; and finally, when the electric core is on fire, the flame retardant effect of the buffer piece can delay the fire spreading and increase the escape time.

As an improvement of heat dissipation soft-packing battery module, still including the heat dissipation shell, it is a plurality of the soft-packing battery is fixed in the heat dissipation shell, and a plurality of be fixed in through heat-conducting glue behind the extension coincide on the inner wall of heat dissipation shell. The heat conduction glue is 1-6W/m.K in heat conduction coefficient and 1-3 mm in thickness. The heat conductivity coefficient is large, and the heat conduction efficiency is high. The undersize of the heat-conducting glue cannot play a good role in heat conduction, the overlarge thickness of the heat-conducting glue can increase a conduction path, and meanwhile, the whole volume of the battery module is increased, so that the energy density is reduced.

The beneficial effects of the utility model reside in that: the utility model provides a soft-packing battery, including plastic-aluminum composite packaging bag and encapsulate in naked electric core in the plastic-aluminum composite packaging bag, at least one side and/or the base of plastic-aluminum composite packaging bag are provided with the extension, naked electric core passes through the extension dispels the heat. The utility model also provides a heat dissipation soft-packing battery module, it is including a plurality of soft-packing battery, a plurality of the extension of soft-packing battery coincide in proper order. Compared with the prior art, the utility model discloses simple structure directly concentrates the heat dissipation behind the extension conduction heat, and the radiating effect is good, and battery module weight reduction moreover, energy density rises.

Drawings

Fig. 1 is the utility model discloses well heat dissipation laminate polymer battery module's schematic structure diagram.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is one of the schematic structures of the flexibly packaged battery of example 1.

FIG. 4 is a second schematic view of the structure of the battery with soft package in example 1

Fig. 5 is a schematic view of the structure of the flexibly packaged battery of example 2.

Fig. 6 is a schematic view showing the structure of a flexibly packaged battery according to example 3.

Fig. 7 is a second schematic structural view of the flexibly packaged battery of example 3.

Fig. 8 is a schematic view of the structure of the flexibly packaged battery of example 4.

Fig. 9 is a schematic view of the structure of the flexibly packaged battery of example 5.

Wherein: 1-radiating shell, 2-flexible package battery, 3-heat conducting glue, 4-buffer piece, 21-naked electric core, 22-aluminum-plastic composite packaging bag and 221-extension part.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the present invention.

Example 1

As shown in fig. 1 to 4, a heat dissipation flexible package battery module includes a heat dissipation housing 1 and a plurality of flexible package batteries 2 fixed in the heat dissipation housing 1, each flexible package battery 2 includes an aluminum-plastic composite packaging bag 22 and a bare cell 21 packaged in the aluminum-plastic composite packaging bag 22, the aluminum-plastic composite packaging bag 22 is provided with an extension portion 221, the bare cell 21 dissipates heat through the extension portion 221, and the extension portions 221 of the plurality of flexible package batteries 2 are sequentially overlapped and then fixed on the inner wall of the heat dissipation housing 1 through heat conductive glue 3.

Furthermore, the extension parts 221 of the plurality of flexible-packaged batteries 2 are disposed on the same side. The two electrode lugs of the flexible package battery 2 are arranged at the top end of the naked electric core 21; or a tab of the flexible package battery 2 is disposed on the top end of the bare cell 21, and another tab of the flexible package battery 2 is disposed on the bottom end of the bare cell 21. The heat emitted by the flexible package batteries 2 is intensively conducted to the same side of the battery module through the extending part 221 and then conducted to the outside of the battery module, so that the structure is simple, and the heat dissipation effect is good.

Further, the heat dissipation flexible package battery module of this embodiment still includes bolster 4, and every n flexible package battery 2 is a battery unit, and bolster 4 sets up between two adjacent battery units, and n is greater than or equal to 1. The buffer member 4 is a heat-insulating foam material with a thickness of 0.5-2 mm. Firstly, the heat-insulating foaming material has low hardness and high resilience, and can absorb the bulging stress of the battery to play a role in buffering; secondly, when the battery core sends out thermal runaway, the buffer part 4 can play a role in heat insulation, inhibit thermal diffusion and delay accidents; finally, when the electric core is on fire, the flame retardant effect of the buffer part 4 can delay the fire spreading and increase the escape time.

Furthermore, the heat conductivity coefficient of the heat-conducting glue 3 is 1-6W/m.K, and the thickness of the heat-conducting glue 3 is 1-3 mm. The heat conductivity coefficient is large, and the heat conduction efficiency is high. The undersize of the heat-conducting glue 3 cannot play a good role in heat conduction, the overlarge thickness of the heat-conducting glue 3 can increase a conduction path, and meanwhile, the whole volume of the battery module is increased, so that the energy density is reduced.

During the use process of the soft package battery module, the heat emitted by the soft package battery 2 is conducted to the extension parts 221, and then the heat is gathered at the plurality of overlapped extension parts 221 and conducted to the outside of the battery module through the heat conducting glue 3 and the heat dissipation shell 1. On one hand, the heat emitted by the medium-soft package battery 2 of the utility model is directly collected and conducted through the extension part 22 and then conducted out through the heat conducting glue 3, and is not required to be collected and conducted through various media, so that the heat dissipation effect is good; on the other hand, the utility model discloses need not to add and establish parts such as fin, simple structure has alleviateed the weight of battery module moreover, has reduced the volume of battery module, has improved the energy density of battery module.

Example 2

As shown in fig. 5, unlike embodiment 1: in the present embodiment, the extension parts 221 of the plurality of flexibly packaged batteries 2 are all disposed at the bottom edge. The two pole ears of flexible package battery 2 all set up in the top of naked electric core 21. The heat emitted by the flexible package batteries 2 is intensively conducted to the bottom of the battery module through the extending part 221 and then conducted to the outside of the battery module, so that the structure is simple, and the heat dissipation effect is good.

The rest is the same as embodiment 1, and the description is omitted here.

Example 3

As shown in fig. 6 to 7, the differences from embodiment 1 are: in the present embodiment, the extension parts 221 of the plurality of flexible packaged batteries 2 are disposed on both sides simultaneously. The two electrode lugs of the flexible package battery 2 are arranged at the top end of the naked electric core 21; or a tab of the flexible package battery 2 is disposed on the top end of the bare cell 21, and another tab of the flexible package battery 2 is disposed on the bottom end of the bare cell 21. The heat emitted by the flexible package batteries 2 is respectively conducted to the two sides of the battery module through the extending parts 221 and then conducted to the outside of the battery module, and the heat is conducted in two directions, so that the heat dissipation effect is better.

The rest is the same as embodiment 1, and the description is omitted here.

Example 4

As shown in fig. 8, unlike embodiment 1: in the present embodiment, the extension parts 221 of the flexible-packaged batteries 2 are all disposed on the same side and bottom side. The two pole ears of flexible package battery 2 all set up in the top of naked electric core 21. The heat emitted by the flexible package batteries 2 is conducted to one side and the bottom of the battery module through the extending part 221 and then conducted to the outside of the battery module, so that the heat in the horizontal direction and the heat in the vertical direction are conducted simultaneously, and the heat dissipation effect is better.

The rest is the same as embodiment 1, and the description is omitted here.

Example 5

As shown in fig. 9, unlike embodiment 1: in the present embodiment, the extension parts 221 of the plurality of flexible packaged batteries 2 are disposed on both sides and bottom side. The two pole ears of flexible package battery 2 all set up in the top of naked electric core 21. The heat emitted by the flexible package batteries 2 is respectively conducted to the two sides and the bottom of the battery module through the extending parts 221 and then conducted to the outside of the battery module, so that multidirectional heat conduction is realized, and the heat dissipation effect is excellent.

The rest is the same as embodiment 1, and the description is omitted here.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed above, or as otherwise known in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A flexible package battery, characterized in that: including aluminium-plastic composite packaging bag and encapsulate in naked electric core in the aluminium-plastic composite packaging bag, at least one side and/or the base of aluminium-plastic composite packaging bag are provided with the extension, naked electric core passes through the extension dispels the heat.

2. The utility model provides a heat dissipation soft-packing battery module which characterized in that: the flexible package battery comprises a plurality of flexible package batteries according to claim 1, and the extension parts of the plurality of flexible package batteries are sequentially overlapped.

3. The heat dissipating flexible package battery module of claim 2, wherein: the extending parts of the flexible package batteries are arranged on the same side.

4. The heat dissipating flexible package battery module of claim 2, wherein: the extension parts of the flexible package batteries are arranged on the bottom edge.

5. The heat dissipating flexible package battery module of claim 2, wherein: the extension parts of the flexible package batteries are arranged on the two side edges at the same time.

6. The heat dissipating flexible package battery module of claim 2, wherein: the extending parts of the flexible package batteries are arranged on the same side edge and the bottom edge at the same time.

7. The heat dissipating flexible package battery module of claim 2, wherein: the extension parts of the flexible package batteries are arranged on the two side edges and the bottom edge at the same time.

8. The heat dissipating flexible package battery module of claim 2, wherein: the soft package battery pack is characterized by further comprising a buffer piece, wherein each n soft package battery is a battery unit, the buffer piece is arranged between every two adjacent battery units, and n is larger than or equal to 1.

9. The heat dissipating flexible package battery module of claim 8, wherein: the buffer piece is a heat-insulating foaming material with the thickness of 0.5-2 mm.

10. The heat dissipating flexible package battery module of claim 2, wherein: the flexible package battery pack is characterized by further comprising a heat dissipation shell, the flexible package batteries are fixed in the heat dissipation shell, and the extension parts are overlapped and then fixed on the inner wall of the heat dissipation shell through heat conducting glue.