阅读说明：本技术 锂电池的均温散热模块结构 (Uniform temperature heat dissipation module structure of lithium battery ) 是由 江原立 于 2020-05-15 设计创作，主要内容包括：本发明为一种锂电池的均温散热模块结构,包括电池芯及金属外壳。电池芯包括电池芯体及二电极片。金属外壳包含贴接电池芯体的散热面及框围散热面的边框,边框及散热面之间形成有凹向电池芯的缓冲空间,借此提供电池芯膨胀时所需的变形空间,借以维持锂电池的整体外观,并达到散热效果。(The invention relates to a temperature-equalizing heat-dissipating module structure of a lithium battery, which comprises a battery core and a metal shell. The battery core comprises a battery core body and two electrode plates. The metal shell comprises a radiating surface attached to the battery core body and a frame surrounding the radiating surface, and a buffer space concave to the battery core is formed between the frame and the radiating surface, so that a deformation space required by the expansion of the battery core is provided, the overall appearance of the lithium battery is maintained, and the radiating effect is achieved.)

1. The utility model provides a samming heat dissipation module structure of lithium cell which characterized in that includes:

the battery core comprises a battery core body and two electrode plates; and

and the metal shell comprises a heat dissipation surface attached to the battery core body and a frame surrounding the heat dissipation surface, and a buffer space concave to the battery core is formed between the frame and the heat dissipation surface.

2. The temperature-equalizing and heat-dissipating module structure of claim 1, wherein the metal case has a first case and a second case opposite to each other, the first case and the second case cover the battery core and have a buffer space respectively, and the two electrode tabs protrude between the first case and the second case.

3. The temperature-equalizing and heat-dissipating module structure of a lithium battery as claimed in claim 1, further comprising a thermally conductive layer disposed between the metal case and the battery core.

4. The temperature-equalizing and heat-dissipating module structure of claim 3, wherein the heat-conducting layer is a heat-conducting adhesive.

5. The temperature-equalizing and heat-dissipating module structure of a lithium battery as claimed in claim 1, further comprising a plurality of buffer sheets respectively disposed between the frame of the metal case and the battery core.

6. The structure of claim 5, wherein the plurality of buffer plates comprise a plurality of buffer side plates and a buffer bottom plate, the plurality of buffer side plates are respectively disposed on two sides of the battery core, and the buffer bottom plate is disposed on a bottom side of the battery core.

7. The temperature-equalizing heat-dissipating module structure of a lithium battery as claimed in claim 6, wherein the plurality of buffer sheets further comprise a plurality of buffer strips, and the plurality of buffer strips are disposed in parallel between the buffer base plate and the bottom side of the battery core.

8. The temperature equalizing and heat dissipating module structure of claim 1, wherein the metal casing is an aluminum casing.

9. The structure of a temperature equalizing and heat dissipating module for a lithium battery as claimed in claim 1, wherein the number of the battery cells and the number of the metal cases are respectively plural, the plural battery cells are stacked adjacently, each of the metal cases has a buffer space between the adjacent battery cell bodies, and the buffer spaces of the adjacent battery cell bodies together form an expansion space.

10. The structure of a temperature equalizing and heat dissipating module for a lithium battery as claimed in claim 9, wherein the outer sides of the outermost metal cases each have a buffer space recessed toward the battery cell.

Technical Field

The present invention relates to a lithium battery, and more particularly, to a temperature-equalizing and heat-dissipating module structure of a lithium battery.

Background

Lithium batteries generate electricity by chemically reacting electrodes of battery cells with an electrolyte. In the process of charging or discharging, the internal electrolyte of the lithium battery generates a large amount of heat when performing ion exchange, so that the internal temperature is increased, the service life of the battery core is shortened, and the use safety is doubtful. Therefore, how to provide an effective temperature equalization and heat dissipation structure for the lithium battery so as to keep the working temperature of the battery core stable and in a temperature equalization state is a key for improving the service life and safety of the battery module.

On the other hand, the electrolyte of the lithium battery is cracked to generate gas in the reaction process. The gas can cause the internal pressure of the battery core to rise, which causes the separation of the positive and negative pole pieces of the battery core from the isolating membrane, so that the performance and the service life of the battery core are changed sharply, even the appearance of an electronic device using the battery core module is influenced, the overall appearance of the lithium battery is deformed, and even the appearance of the electronic device using the lithium battery core module is influenced.

Disclosure of Invention

The invention aims to provide a temperature-equalizing heat-dissipating module structure of a lithium battery, which provides a deformation space required by electrode plates during expansion and contraction of a battery core during charging and discharging so as to maintain the overall appearance of the lithium battery module and achieve temperature equalization and heat dissipation effects.

In order to achieve the above object, the present invention is a temperature-equalizing heat-dissipating module structure of a lithium battery, including a battery core and a metal casing. The battery core comprises a battery core body and two electrode plates. The metal shell comprises a heat dissipation surface attached to the battery core and a frame surrounding the heat dissipation surface, and a buffer space concave to the battery core is formed between the frame and the heat dissipation surface.

Optionally, the metal housing has a first housing and a second housing opposite to each other, the first housing and the second housing cover the battery core and have a buffer space respectively, and the two electrode tabs protrude between the first housing and the second housing.

Optionally, the battery further comprises a heat conducting layer, wherein the heat conducting layer is arranged between the metal shell and the battery core body.

Optionally, the heat conducting layer is a heat conducting glue.

Optionally, the battery further includes a plurality of buffer sheets, and the plurality of buffer sheets are respectively disposed between the frame of the metal casing and the battery core.

Optionally, the plurality of buffer plates include a plurality of buffer side plates and a buffer bottom plate, the plurality of buffer side plates are respectively located at two sides of the battery core, and the buffer bottom plate is located at the bottom side of the battery core.

Optionally, the plurality of buffer sheets further include a plurality of buffer strips, and the plurality of buffer strips are arranged between the buffer bottom plate and the bottom side of the battery core body in parallel.

Optionally, the metal housing is an aluminum housing.

Optionally, the number of the battery cells and the number of the metal shells are respectively multiple, the multiple battery cells are stacked adjacently, each metal shell has a buffer space between the adjacent battery cell bodies, and the buffer spaces of the adjacent battery cell bodies together form an expansion space.

Optionally, the outer side surfaces of the metal housings located at the outermost sides respectively have a buffer space recessed toward the battery cell.

Compared with the prior art, the metal shell of the temperature-equalizing heat-radiating module structure of the lithium battery wraps the battery core, and a buffer space which is concave to the battery core is formed between the heat radiating surface and the frame of the metal shell; therefore, when the battery core generates gas and the electrode plate expands and contracts, the gas and the electrode plate can be expanded to the buffer space, the battery core and the electrode plate can not be pushed to the metal shell after expansion and contraction deformation due to the arrangement of the buffer space, and the electrode plate has certain clamping force, so that the overall appearance of the lithium battery module structure is maintained; in addition, the lithium battery module structure can be attached to the battery core body through the metal shell in a large area, so that the temperature equalization and heat dissipation effects are achieved.

Drawings

Fig. 1 is a schematic perspective view of a lithium battery module structure according to the present invention.

Fig. 2 is a schematic perspective exploded view of a lithium battery module structure according to the present invention.

Fig. 3 is a cross-sectional view of a lithium battery module structure of the present invention.

Fig. 4 is a partially enlarged schematic view of fig. 3.

Fig. 5 is a cross-sectional view of another embodiment of a lithium battery module structure of the present invention.

Fig. 6 is a partially enlarged schematic view of fig. 5.

Description of the symbols:

1. 1 a: a lithium battery module structure;

10. 10 a: a battery cell;

11. 11 a: a battery core body;

12: an electrode sheet;

20. 20 a: a metal housing;

200. 200 a: a buffer space;

200 a': an expansion space;

201: a first housing;

202: a second housing;

21: a heat dissipating surface;

22: a frame;

30: a heat conductive layer;

40: a buffer sheet;

41: a buffering side plate;

42: a buffer base plate;

43: a buffer strip.

Detailed Description

The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.

Fig. 1 and fig. 2 are a schematic perspective view and a schematic exploded view of a lithium battery module structure according to the present invention. The invention relates to a temperature-equalizing heat-dissipating module structure of a lithium battery, which comprises a battery core 10 and a metal shell 20. The metal case 20 covers the battery cell 10, thereby constituting the lithium battery module structure 1. The lithium battery module structure 1 is described in more detail below.

The battery cell 10 includes a battery cell body 11 and two electrode tabs 12, wherein the two electrode tabs 12 protrude from the top side of the battery cell body 11. It should be noted that the battery cell 10 is a battery cell packaged by aluminum foil, and the internal structure thereof is not the main technical content of the present invention, and is not described herein again.

The metal case 20 includes a heat dissipation surface 21 attached to the battery core 11 in a large area and a frame 22 surrounding the heat dissipation surface 21; accordingly, the heat generated by the battery core 11 can be dissipated through the attached metal shell 20 to achieve a uniform temperature effect. In addition, a buffer space 200 recessed toward the battery cell 10 is formed between the frame 22 and the heat dissipation surface 21.

In this embodiment, the metal housing 20 has a first housing 201 and a second housing 202 opposite to each other. Preferably, the metal housing 20 is an aluminum housing, but the practical implementation is not limited thereto.

In this embodiment, the lithium battery module structure 1 further includes a heat conducting layer 30. The heat conductive layer 30 is disposed between the metal case 20 and the battery core 11. Preferably, the heat conducting layer 30 is a heat conducting material such as a heat conducting glue. In this embodiment, a heat conduction layer 30 is disposed between each of the two sides of the battery core 11 and the metal casing 20. In this embodiment, the metal case 20 and the battery core 11 are bonded to each other through the heat conductive layer 30.

Furthermore, the lithium battery module structure 1 further includes a plurality of buffer sheets 40. The plurality of buffer sheets 40 are respectively disposed between the frame 22 of the metal case 20 and the battery core 11.

Specifically, the plurality of buffer sheets 40 include a plurality of buffer side plates 41 and a buffer bottom plate 42. The plurality of buffer side plates 41 are respectively located at two sides of the battery core 11, and the buffer bottom plate 42 is located at the bottom side of the battery core 11. In addition, the plurality of buffer sheets 40 further include a plurality of buffer bars 43. The plurality of buffer strips 43 are juxtaposed between the buffer bottom plate 42 and the bottom side of the battery cell 11.

It is noted that the lithium battery module structure 1 enables the battery core 11 to be firmly incorporated in the metal casing 20 by the arrangement of the plurality of buffer sheets 40.

Please refer to fig. 3 and fig. 4, which are a cross-sectional view and a partially enlarged schematic view of the lithium battery module structure of the present invention, respectively. Referring to fig. 3, the two electrode plates 12 protrude between the first housing 201 and the second housing 202. Referring to fig. 4, a buffer space 200 recessed toward the battery cell 10 is formed between the frame 22 and the heat dissipating surface 21 of the metal case 20. More specifically, the first housing 201 and the second housing 202 cover the battery core 11 and respectively have a buffer space 200; therefore, when the battery core 11 generates gas and the electrode plates 12 expand and contract, the gas and the electrode plates 12 will extend to the buffer space 200, and the buffer space 200 is disposed to prevent the battery core 11 and the electrode plates 12 from being pushed to the metal casing 20 after the expansion and contraction deformation, and to provide a certain clamping force to the electrode plates 12, thereby maintaining the overall shape of the lithium battery module structure 1. The heat generated by the battery core 11 can be dissipated through the attached metal shell 20 to achieve a uniform temperature effect and maintain good heat dissipation.

Fig. 5 and fig. 6 are a cross-sectional view and a partially enlarged schematic view of another embodiment of the lithium battery module structure according to the present invention. As shown in fig. 5, the number of battery cells 10a and the number of metal cases 20a in the lithium battery module structure 1a according to the present invention are plural. The plurality of battery cells 10a are stacked adjacently, and each of the metal cases 20a has a buffer space 200a between the adjacent battery cells 11 a. Also, the buffer spaces 200a of the adjacent battery cells 11a together form an expansion space 200a 'to provide the expansion space 200 a' when the adjacent battery cells 11a generate gas to expand. The expansion space 200 a' is provided to prevent the battery core 21a and the electrode tabs from pushing the metal case 20a after expansion and contraction, thereby maintaining the overall shape of the lithium battery module structure 1 a.

It should be noted that, in the present embodiment, the outer side surfaces of the outermost metal cases 20a in the lithium battery module structure 1a respectively have a buffer space 200a recessed toward the battery cell 10 a. In practical implementation, the outermost battery cell 10a may be provided with only one-sided metal casing 20a, that is, the outer side surface of the outermost battery cell 10a does not have the buffer space 200 a.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.