CN222654044U - Battery module and battery pack - Google Patents

Abstract

The application relates to a battery module and a battery pack, wherein the battery module comprises a battery core assembly, a heat conduction assembly and a first thermoelectric effect piece, wherein the battery core assembly is provided with a first heat dissipation surface and a second heat dissipation surface which are oppositely arranged, the heat conduction assembly comprises a first heat conduction piece arranged on the first heat dissipation surface and a second heat conduction piece arranged on the second heat dissipation surface, the first thermoelectric effect piece is arranged on one side of the first heat conduction piece far away from the first heat dissipation surface, a first cold end of the first thermoelectric effect piece is connected with the first heat conduction piece, a first hot end of the first thermoelectric effect piece is used for being connected with a first side wall of a box body of the battery pack, and the second thermoelectric effect piece is arranged on one side of the second heat conduction piece far away from the second heat dissipation surface, and a second cold end of the second thermoelectric effect piece is connected with the second heat conduction piece, and a second hot end of the second thermoelectric effect piece is used for being connected with a second side wall of the box body. The technical scheme of the application effectively solves the technical problems that the traditional battery module has poor heat dissipation performance, cannot meet the normal operation of high-power load and has small environment application range.

Description

Battery module and battery pack

Technical Field

The application relates to the technical field of battery heat dissipation, in particular to a battery module and a battery pack.

Background

The energy storage battery such as a lithium battery has the advantages of high energy density, small volume, long cycle life and the like, and is widely applied to electric equipment such as electric passenger cars, commercial vehicles and the like. However, since the lithium battery generates a large amount of heat during charge and discharge, the internal temperature thereof is increased, thereby affecting its own performance, and even causing accidents such as spontaneous combustion, explosion, etc. due to thermal runaway. Therefore, improvement of heat dissipation performance of the lithium battery is urgent.

In the related art, heat dissipation is generally performed on the battery pack by air cooling or liquid cooling. The conventional air cooling heat dissipation system has the advantages of simple structure, limited heat dissipation effect, incapability of meeting the normal operation of high-power load, high heat exchange efficiency of the liquid cooling heat dissipation system, limited heat dissipation capacity by the environment temperature and small environment application range of the battery pack.

Disclosure of utility model

The application provides a battery module and a battery pack, which are used for solving the technical problems that the traditional battery pack is poor in heat dissipation performance, cannot meet the requirement of high-power load normal operation and is small in environment application range.

Therefore, in a first aspect, the embodiment of the application provides a battery module which comprises a battery core assembly, a heat conduction assembly and a first thermoelectric effect piece, wherein the battery core assembly is provided with a first heat dissipation surface and a second heat dissipation surface which are oppositely arranged, the heat conduction assembly comprises a first heat conduction piece arranged on the first heat dissipation surface and a second heat conduction piece arranged on the second heat dissipation surface, the first thermoelectric effect piece is arranged on one side of the first heat conduction piece far away from the first heat dissipation surface, a first cold end of the first thermoelectric effect piece is connected with the first heat conduction piece, a first hot end of the first thermoelectric effect piece is used for being connected with a first side wall of a box body of a battery pack, and the second thermoelectric effect piece is arranged on one side of the second heat conduction piece far away from the second heat dissipation surface, and a second cold end of the second thermoelectric effect piece is connected with the second heat conduction piece, and a second hot end of the second thermoelectric effect piece is used for being connected with a second side wall of the box body.

In one possible embodiment, the first thermoelectric effect element comprises a first ceramic tile, a first thermoelectric couple pair, a first conductor and a second ceramic tile, wherein the first thermoelectric couple pair is respectively communicated with the first ceramic tile and the second ceramic tile through the first conductor, the first cold end is the first ceramic tile, the first hot end is the second ceramic tile, and/or,

The second thermoelectric effect piece comprises a third ceramic chip, a second thermoelectric couple pair, a second conductor and a fourth ceramic chip, wherein the second thermoelectric couple pair is respectively communicated with the third ceramic chip and the fourth ceramic chip through the second conductor, the second cold end is the third ceramic chip, and the second hot end is the fourth ceramic chip.

In one possible embodiment, the first heat conducting member includes a first abutment surface on a side of the first heat conducting member remote from the first heat dissipating surface, the first cold end includes a second abutment surface abutting the first abutment surface, the first abutment surface being any one of planar, convex, concave, multi-convex or multi-concave, and/or,

The second heat conduction piece comprises a third abutting surface, the third abutting surface is located on one side, far away from the second heat dissipation surface, of the second heat conduction piece, the second cold end comprises a fourth abutting surface abutting against the third abutting surface, and the third abutting surface is any one of a plane, a convex surface, a concave surface, a multi-convex-surface or a multi-concave-surface.

In one possible embodiment, the first hot end includes a fifth abutment surface against the first sidewall, the fifth abutment surface being any one of planar, convex, concave, multi-convex or multi-concave, and/or,

The second hot end is in butt joint with the second side wall, and the sixth butt joint surface is any one of a plane, a convex surface, a concave surface, a multi-convex hull surface or a multi-concave groove surface.

In one possible embodiment, the first heat conducting member comprises a first heat conducting plate and a plurality of first heat conducting columns, the plurality of first heat conducting columns are arranged on the same side of the first heat conducting plate at intervals, the first heat conducting columns are inserted into the cell assembly, the first heat conducting plate is connected with the cell assembly through the plurality of first heat conducting columns and abuts against the first heat radiating surface, and/or,

The second heat conduction piece comprises a second heat conduction plate and a plurality of second heat conduction columns, the second heat conduction columns are arranged on the same side of the second heat conduction plate at intervals, the second heat conduction columns are inserted into the cell module, and the second heat conduction plate is connected to the cell module through the second heat conduction columns and abuts against the second heat dissipation surface.

In one possible embodiment, the heat conduction assembly further includes a first silica gel pad and a second silica gel pad, the first silica gel pad is disposed between the first heat dissipation surface and the first heat conduction member, and the second silica gel pad is disposed between the second heat dissipation surface and the second heat conduction member.

In a second aspect, the present application also provides a battery pack comprising:

the box body is provided with a first side wall and a second side wall which are oppositely arranged;

a case cover covered on the case body and enclosed with the case body to form a closed accommodating cavity, and

As described above, the battery module is disposed in the sealed accommodating cavity, the first hot end of the first thermoelectric effect element of the battery module is abutted against the first sidewall, and the second hot end of the second thermoelectric effect element of the battery module is abutted against the second sidewall.

In one possible embodiment, the first sidewall is any one of planar, serrated, concave, or convex, and/or,

The second sidewall is any one of planar, serrated, concave or convex.

In one possible embodiment, the battery pack is formed using a potting process.

In one possible embodiment, a plurality of battery modules are provided, and the plurality of battery modules are overlapped in the sealed accommodating cavity along the length direction of the box body.

In one possible embodiment, the battery module further includes third thermoelectric elements disposed on opposite sides of the battery module along a length direction of the case.

According to the battery module and the battery pack provided by the embodiment of the application, the first thermoelectric effect piece and the second thermoelectric effect piece are additionally arranged on the outer side of the heat conduction component, and the heat generated at the position of the battery core component is directionally transferred to the outer edge of the battery core component through the current led in the first thermoelectric effect piece and the second thermoelectric effect piece, so that the uniform heat dissipation of the battery module is realized, the temperature uniformity, the charge and discharge performance and the heat dissipation effect of the battery module are improved, and meanwhile, the heat dissipation efficiency of the battery core component is further improved through the integrated heat dissipation mode of combining the heat conduction component with the first thermoelectric effect piece and the second thermoelectric effect piece, so that the battery module can be suitable for the heat dissipation requirement of high-power load operation, and the application range of the battery module is improved. In addition, compared with the traditional liquid cooling heat dissipation mode, the heat transfer operation of the first thermoelectric effect piece and the second thermoelectric effect piece is not limited by the ambient temperature, and the battery module provided by the embodiment of the application has the advantages of wider environment application range and more application scenes. The battery module is configured to be a combined component at least comprising a battery cell assembly, a heat conduction assembly, a first thermoelectric effect piece and a second thermoelectric effect piece, wherein the heat conduction assembly is configured to be a combined component at least comprising the first heat conduction piece and the second heat conduction piece, the first heat conduction piece is configured at a first heat radiating surface of the battery cell assembly, the first thermoelectric effect piece is configured at the outer side of the first heat conduction piece, meanwhile, the second heat conduction piece is configured at a second heat radiating surface of the battery cell assembly, the second thermoelectric effect piece is configured at the outer side of the second heat conduction piece, so that a heat conduction heat transfer system is formed at two opposite sides of the battery cell assembly respectively, the heat generated by the battery cell assembly can be transferred to a first hot end and a second hot end respectively, uniform heat dissipation can be realized at least at two sides of the battery cell assembly, the heat dissipation efficiency is improved, the first hot end and the second hot end are both abutted against the inner wall of a box of the battery pack, and the heat can be further transferred from the first box and the second box to the outer side of the battery pack.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort. One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is an exploded view of a battery module according to an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a first thermoelectric device/a second thermoelectric device of a battery module according to an embodiment of the present application;

Fig. 3 is an exploded view of a battery pack according to an embodiment of the present application;

fig. 4 is a sectional view of a battery pack according to an embodiment of the present application.

Reference numerals illustrate:

100. a cell assembly; 101, a first radiating surface, 102, a second radiating surface;

200. A heat conducting component; 201, a first abutting surface, 202, a third abutting surface, 210, a first heat conduction piece, 211, a first heat conduction plate, 212, a first heat conduction column, 220, a second heat conduction piece, 221, a second heat conduction plate, 222, a second heat conduction column, 230, a first silica gel pad, 240, a second silica gel pad;

300. the first thermoelectric effect element, 301, second abutting surface, 302, fifth abutting surface, 310, first porcelain piece, 320, first thermoelectric couple pair, 330, first conductor, 340, second porcelain piece, 350, first cable group;

400. The second thermoelectric effect element, 401, fourth abutting surface, 402, sixth abutting surface, 410, third porcelain piece, 420, second thermoelectric couple pair, 430, second conductor, 440, fourth porcelain piece, 450, second cable group;

10. A case; 11, a first side wall, 12, a second side wall, 20, a box cover, 30, a battery module, 40 and a third thermoelectric effect element;

y, length direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "upper," "above," "front," "rear," and the like, may be used herein to describe one element's or feature's relative positional relationship or movement to another element's or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures experiences a positional reversal or a change in attitude or a change in state of motion, then the indications of these directives will also correspondingly change, e.g., an element described as "under" or "under" another element or feature will then be oriented "over" or "over" the other element or feature. Thus, the example term "below" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

Referring to fig. 1, 2 and 4, the embodiment of the application provides a battery module 30, which comprises a battery cell assembly 100 having a first heat dissipation surface 101 and a second heat dissipation surface 102 opposite to each other, a heat conduction assembly 200 comprising a first heat conduction member 210 disposed on the first heat dissipation surface 101 and a second heat conduction member 220 disposed on the second heat dissipation surface 102, a first thermoelectric effect member 300 disposed on a side of the first heat conduction member 210 away from the first heat dissipation surface 101, a first cold end of the first thermoelectric effect member 300 connected to the first heat conduction member 210, a first hot end of the first thermoelectric effect member 300 connected to a first side wall 11 of a case 10 of a battery pack, and a second thermoelectric effect member 400 disposed on a side of the second heat conduction member 220 away from the second heat dissipation surface 102, a second cold end of the second thermoelectric effect member 400 connected to the second heat conduction member 220, and a second hot end of the second thermoelectric effect member 400 connected to a second side wall 12 of the case 10.

In this embodiment, the first thermoelectric effect element 300 and the second thermoelectric effect element 400 are added on the outer side of the heat conducting component 200, and the heat generated at the position of the battery cell component 100 is directionally transferred from the inside of the battery cell component 100 to the outer edge thereof by introducing current into the first thermoelectric effect element 300 and the second thermoelectric effect element 400, so that uniform heat dissipation of the battery module 30 is achieved, the temperature uniformity, the charge-discharge performance and the heat dissipation effect of the battery module 30 are improved, and meanwhile, the heat dissipation efficiency of the battery cell component 100 is further improved by the integrated heat dissipation mode of combining the heat conducting component 200 with the first thermoelectric effect element 300 and the second thermoelectric effect element 400, so that the battery module 30 can be suitable for the heat dissipation requirement of high-power load operation, and the application range of the battery module 30 is improved. In addition, compared with the traditional liquid cooling heat dissipation method, the heat transfer operation of the first thermoelectric effect element 300 and the second thermoelectric effect element 400 is not limited by the ambient temperature, and the battery module 30 provided by the embodiment of the application has a wider environment application range and more application scenes.

Specifically, the battery module 30 is configured to include at least a combined member of the battery cell assembly 100, the heat conduction assembly 200, the first thermoelectric effect 300, and the second thermoelectric effect 400, and the heat conduction assembly 200 may be a high heat conduction material such as copper or aluminum, which is configured to include at least a combined member of the first heat conduction member 210 and the second heat conduction member 220. The first heat conductive member 210 may be a copper/aluminum member disposed at the first heat dissipation surface 101 of the cell assembly 100 for transferring heat at the first heat dissipation surface 101 to the outside of the first heat conductive member 210, and the first thermoelectric effect member 300 may be a semiconductor thermoelectric material sheet member made of bismuth telluride disposed at the outside of the first heat conductive member 210, so that heat at the outside of the first heat conductive member 210 is transferred to the first hot end thereof through the first thermoelectric effect member 300, thereby realizing heat transfer from the inside to the outside at the first heat dissipation surface 101 side of the cell assembly 100. Meanwhile, the second heat conductive member 220 may be a copper/aluminum member disposed at the second heat dissipation surface 102 of the cell assembly 100 for transferring heat at the second heat dissipation surface 102 to the outside of the second heat conductive member 220, and the second thermoelectric effect member 400 may be a semiconductor thermoelectric material sheet member made of bismuth telluride disposed at the outside of the second heat conductive member 220, so that heat at the outside of the second heat conductive member 220 can be transferred to the second hot end thereof through the second thermoelectric effect member 400, thereby realizing the heat transfer from the inside to the outside at the second heat dissipation surface 102 side of the cell assembly 100. In this way, the first heat conduction element 210, the first thermoelectric element 300, the second heat conduction element 220 and the second thermoelectric element 400 can form heat conduction and transfer systems on two opposite sides of the battery cell assembly 100 respectively, the heat conduction and transfer systems can transfer heat generated by the battery cell assembly 100 to the first hot end and the second hot end respectively, at least two sides of the battery cell assembly 100 can simultaneously realize heat dissipation, heat dissipation efficiency is improved, and heat dissipation effect is improved.

In one example, the battery cell assembly 100 includes a plurality of battery cells and at least two battery holders in which the plurality of battery cells are disposed. Specifically, the battery support is provided with a plurality of accommodating half grooves capable of accommodating the battery cells, and after two ends of the battery cells are respectively inserted into the corresponding accommodating half grooves of the two battery supports, the two battery supports can be connected through fasteners such as external long screws/bolts, so that the connection and the fastening of the battery cell assembly 100 are realized.

In one possible embodiment, the first thermoelectric effect 300 includes a first tile 310, a first thermocouple pair 320, a first conductor 330, and a second tile 340, the first thermocouple pair 320 is in communication with the first tile 310 and the second tile 340, respectively, by the first conductor 330, the first cold end is the first tile 310, the first hot end is the second tile 340, and/or the second thermoelectric effect 400 includes a third tile 410, a second thermocouple pair 420, a second conductor 430, and a fourth tile 440, the second thermocouple pair 420 is in communication with the third tile 410 and the fourth tile 440, respectively, by the second conductor 430, the second cold end is the third tile 410, and the second hot end is the fourth tile 440.

In this embodiment, the specific configuration of the first thermoelectric element 300 is optimized. Specifically, the first thermoelectric device 300 is configured as a combined member including at least a first tile 310, a first thermocouple pair 320, a first conductor 330 and a second tile 340, wherein the first tile 310 is a cold-end tile, the outer side of which abuts against the first heat conducting member 210, and the second tile 340 is a hot-end tile, the outer side of which abuts against the first side wall 11 of the case 10. The first thermocouple pair 320 may be formed by serially combining n-type and p-type thermocouple arms in the same number, and a plurality of pairs may be provided, wherein the first thermocouple pair 320 is serially connected between the first ceramic tile 310 and the second ceramic tile 340 through the first conductor 330, and it is understood that in the n-type material, the heat flow direction is opposite to the current direction, and in the p-type material, the heat flow direction is the same as the current direction, so that the heat flow direction of each pair of thermocouple pairs is the same by providing n-type and p-type thermocouple arms in the same number and in series, thereby enabling the heat to be directionally transferred in the first thermoelectric effect 300. The first conductor 330 may be a metal conductive sheet, which is disposed on the inner sides of the first ceramic tile 310 and the second ceramic tile 340, and two ends of the first thermocouple pair 320 are respectively connected to the corresponding first conductor 330, so that a current loop can be formed between the first conductor 330 and the first thermocouple pair 320, and the direction of the current loop is adjusted to adjust the direction of the heat flow between the first ceramic tile 310 and the second ceramic tile 340.

The specific configuration of the second thermoelectric effect 400 is optimized. Specifically, the second thermoelectric device 400 is configured as a combined member including at least a third tile 410, a second thermocouple pair 420, a second conductor 430 and a fourth tile 440, wherein the third tile 410 is a cold-end tile, the outer side of which abuts against the second heat conducting member 220, and the fourth tile 440 is a hot-end tile, the outer side of which abuts against the second side wall 12 of the case 10. The second thermocouple pair 420 may be formed by serially combining n-type and p-type thermocouple arms in the same number, and a plurality of pairs of the second thermocouple pairs 420 may be disposed and serially connected between the third ceramic tile 410 and the fourth ceramic tile 440 through the second conductor 430. It is understood that in the n-type material, the heat flow direction is opposite to the current direction, and in the p-type material, the heat flow direction is the same as the current direction, so that the heat flow direction in each pair of thermocouple pairs is the same by disposing n-type and p-type thermocouple arms in the same number and serially connected, thereby allowing the heat to be directionally transferred in the second thermoelectric effect member 400. The second conductor 430 may be a metal conductive sheet, which is disposed on the inner sides of the third ceramic tile 410 and the fourth ceramic tile 440, and two ends of the second thermocouple pair 420 are respectively connected to the corresponding second conductor 430, so that a current loop is formed between the second conductor 430 and the second thermocouple pair 420, and the direction of the current loop is adjusted to adjust the direction of the heat flow between the third ceramic tile 410 and the fourth ceramic tile 440.

In an example, the first thermoelectric device 300 further includes a first cable assembly 350, and two ends of the first cable assembly 350 are respectively connected to the two outermost first conductors 330 on the second tile 340 and are simultaneously connected to a power source. The second thermoelectric device 400 further includes a second cable set 450, and two ends of the second cable set 450 are respectively connected to two second conductors 430 on the outermost side of the fourth tile 440 and are simultaneously connected to a power source. In this manner, power is provided to the first thermocouple pair and the second thermocouple pair to facilitate adjusting the direction of heat flow in the first thermoelectric effect 300 and the second thermoelectric effect 400.

In one possible embodiment, the first heat conducting member 210 includes a first abutment surface 201, the first abutment surface 201 is located on a side of the first heat conducting member 210 away from the first heat dissipating surface 101, the first cold end includes a second abutment surface 301 abutting against the first abutment surface 201, and the first abutment surface 201 is any one of a plane, a convex surface, a concave surface, a multi-convex-surface, or a multi-concave-surface. So set up, the contact area of the junction of first heat-conducting piece 210 and first cold junction can be increased to increase heat radiating area, improve radiating efficiency and radiating effect. Specifically, the first contact surface 201 may be a plane, and at this time, the second contact surface 301 is also a plane, so that the processing is convenient and the production cost is reduced. Or the first abutting surface 201 may be a convex surface or multiple convex surfaces, at this time, the second abutting surface 301 is a concave surface matched with the convex surface or multiple concave surfaces matched with the multiple convex surfaces, so as to increase the contact area of the joint of the first heat conducting element 210 and the first cold end, increase the heat dissipation area, and improve the heat dissipation efficiency and the heat dissipation effect, and meanwhile, by the configuration of the convex surfaces and the concave surfaces, the connection tightness of the first heat conducting element 210 and the first thermoelectric effect sheet can be enhanced, and the stability of the whole battery module 30 is improved.

Of course, in other embodiments, the first contact surface 201 may be a concave surface or a multi-concave surface, and in this case, the second contact surface 301 may be a concave surface adapted to the convex surface, or a multi-convex surface adapted to the multi-concave surface, and the specific shapes of the first contact surface 201 and the second contact surface 301 are not limited herein, as long as they can abut against each other.

In one possible embodiment, the second heat conducting member 220 includes a third abutment surface 202, the third abutment surface 202 is located on a side of the second heat conducting member 220 away from the second heat dissipating surface 102, the second cold end includes a fourth abutment surface 401 abutting against the third abutment surface 202, and the third abutment surface 202 is any one of a plane, convex, concave, multi-convex or multi-concave surface. So set up, the contact area of the junction of second heat-conducting piece 220 and the second cold junction can be increased to increase heat radiating area, improve radiating efficiency and radiating effect. Specifically, the third contact surface 202 may be a plane, and in this case, the fourth contact surface 401 is also a plane, so that the processing is convenient and the production cost is reduced. Or the third contact surface 202 may be a convex surface or multiple convex surfaces, and at this time, the fourth contact surface 401 is a concave surface adapted to the convex surface or multiple concave surfaces adapted to the multiple convex surfaces, so as to increase the contact area of the connection part of the second heat conducting member 220 and the second cold end, increase the heat dissipation area, and improve the heat dissipation efficiency and the heat dissipation effect, and meanwhile, by the configuration of the convex surfaces and the concave surfaces, the connection tightness of the second heat conducting member 220 and the second thermoelectric effect sheet can be enhanced, and the stability of the whole battery module 30 is improved.

Of course, in other embodiments, the third contact surface 202 may be a concave surface or a multi-concave surface, and in this case, the fourth contact surface 401 may be a concave surface adapted to the convex surface or a multi-convex surface adapted to the multi-concave surface, and the specific shapes of the third contact surface 202 and the fourth contact surface 401 are not limited herein, as long as they can abut against each other.

In one possible embodiment, the first hot end includes a fifth abutment surface 302 that abuts the first sidewall 11, the fifth abutment surface 302 being any one of a planar surface, a convex surface, a concave surface, a multi-convex hull surface, or a multi-concave surface. By the arrangement, the contact area of the joint of the first hot end and the first side wall 11 can be increased, so that the heat dissipation area is increased, and the heat dissipation efficiency and the heat dissipation effect are improved. Specifically, the fifth contact surface 302 may be a plane, and at this time, the contact surface of the first sidewall 11 is also a plane, so as to facilitate processing and reduce production cost. Or the fifth contact surface 302 may be a convex surface or multiple convex surfaces, where the contact surface of the first side wall 11 is a concave surface adapted to the convex surface or multiple concave surfaces adapted to the multiple convex surfaces, so as to increase the contact area of the connection part between the first hot end and the first side wall 11, increase the heat dissipation area, and improve the heat dissipation efficiency and the heat dissipation effect, and meanwhile, by the configuration of the convex surfaces and the concave surfaces, the connection tightness between the first thermoelectric effect element 300 and the first side wall 11 can be enhanced, and the stability of the whole battery module 30 is improved.

Of course, in other embodiments, the fifth contact surface 302 may be a concave surface or a multi-concave surface, and in this case, the contact surface of the first side wall 11 is a concave surface adapted to the convex surface or a multi-convex surface adapted to the multi-concave surface, and the specific shapes of the contact surfaces of the fifth contact surface 302 and the first side wall 11 are not limited herein, as long as they can abut against each other.

In one possible embodiment, the second hot end abuts the sixth abutment surface 402 of the second sidewall 12, and the sixth abutment surface 402 is any one of a planar surface, a convex surface, a concave surface, a multi-convex hull surface, or a multi-concave surface. By the arrangement, the contact area of the joint of the second hot end and the second side wall 12 can be increased, so that the heat dissipation area is increased, and the heat dissipation efficiency and the heat dissipation effect are improved. Specifically, the sixth contact surface 402 may be a plane, and in this case, the contact surface of the second sidewall 12 is also a plane, so that the processing is convenient and the production cost is reduced. Or the sixth abutting surface 402 may be a convex surface or multiple convex surfaces, at this time, the abutting surface of the second side wall 12 is a concave surface matched with the convex surface or multiple concave surfaces matched with the multiple convex surfaces, so as to increase the contact area of the connection part of the second hot end and the second side wall 12, increase the heat dissipation area, and improve the heat dissipation efficiency and the heat dissipation effect, and meanwhile, by the configuration of the convex surfaces and the concave surfaces, the connection tightness of the second thermoelectric effect element 400 and the first side wall 11 can be enhanced, and the stability of the whole battery module 30 is improved.

Of course, in other embodiments, the sixth contact surface 402 may be a concave surface or a multi-concave surface, and in this case, the contact surface of the second side wall 12 is a concave surface adapted to the convex surface, or a multi-convex surface adapted to the multi-concave surface, and the specific shapes of the contact surfaces of the sixth contact surface 402 and the second side wall 12 are not limited herein, as long as they can abut against each other.

In one possible embodiment, the first heat conducting member 210 includes a first heat conducting plate 211 and a plurality of first heat conducting columns 212, the plurality of first heat conducting columns 212 are disposed at the same side of the first heat conducting plate 211 at intervals, the first heat conducting columns 212 are inserted into the cell assembly 100, the first heat conducting plate 211 is connected to the cell assembly 100 through the plurality of first heat conducting columns 212 and abuts against the first heat dissipating surface 101, and/or the second heat conducting member 220 includes a second heat conducting plate 221 and a plurality of second heat conducting columns 222, the plurality of second heat conducting columns 222 are disposed at the same side of the second heat conducting plate 221 at intervals, the second heat conducting columns 222 are inserted into the cell assembly 100, and the second heat conducting plate 221 is connected to the cell assembly 100 through the plurality of second heat conducting columns 222 and abuts against the second heat dissipating surface 102.

In the present embodiment, the specific configuration of the first heat conductive member 210/the second heat conductive member 220 is optimized. Specifically, the first heat conducting member 210 is configured as a combined member at least including a first heat conducting plate 211 and a plurality of first heat conducting columns 212, where the first heat conducting plate 211 may be a copper metal plate, and a plurality of connection holes are formed on the first heat conducting plate, and the first heat conducting columns 212 may be copper metal columns, one ends of which may be connected to the connection holes of the first heat conducting plate 211 by welding or the like, and the other ends of which may be plugged into the cell assembly 100 through the connection holes formed on the cell assembly 100, so as to transfer heat generated inside the cell assembly 100 outwards, thereby realizing cooling inside the cell assembly 100 and improving the temperature uniformity of the cell assembly 100.

The second heat conductive member 220 is configured as a combined member including at least a second heat conductive plate 221 and a plurality of second heat conductive posts 222, and the second heat conductive plate 221 may be a copper metal plate member provided with a plurality of connection holes thereon; the second heat conductive post 222 may be a copper metal post, one end of which may be connected to the connection hole of the second heat conductive plate 221 by welding, and the other end of which may be inserted into the battery cell assembly 100 through the connection hole provided on the battery cell assembly 100, so as to transfer the heat generated in the battery cell assembly 100 to the outside, thereby cooling the inside of the battery cell assembly 100 and improving the temperature uniformity of the battery cell assembly 100.

In one possible embodiment, the heat conduction assembly 200 further includes a first silica gel pad 230 and a second silica gel pad 240, the first silica gel pad 230 is disposed between the first heat dissipation surface 101 and the first heat conduction member 210, and the second silica gel pad 240 is disposed between the second heat dissipation surface 102 and the second heat conduction member 220.

In this embodiment, the specific configuration of the heat conduction assembly 200 is further optimized. Specifically, the heat conducting assembly 200 is configured as a combined member at least including the first heat conducting member 210, the second heat conducting member 220, the first silica gel pad 230 and the second silica gel pad 240, and the first silica gel pad 230 is configured between the first heat conducting member 210 and the first heat dissipation surface 101, which can be used to form a buffer structure between the first heat conducting member 210 and the first heat dissipation surface 101 of the battery cell assembly 100, so as to prevent the mechanical damage of the battery cell assembly 100 caused by external impact force/impact force, and improve the impact resistance of the battery cell assembly 100, and can increase the heat dissipation space between the first heat conducting member 210 and the first heat dissipation surface 101, further improve the heat dissipation effect, and enhance the heat dissipation performance. The second silica gel pad 240 is disposed between the second heat conducting member 220 and the second heat dissipating surface 102, which can be used to form a buffer structure between the second heat conducting member 220 and the second heat dissipating surface 102 of the battery cell assembly 100, prevent the mechanical damage of the battery cell assembly 100 caused by external impact force/impact force, improve the shock resistance of the battery cell assembly 100, and increase the heat dissipating space between the second heat conducting member 220 and the second heat dissipating surface 102, further improve the heat dissipating effect, and enhance the heat dissipating performance.

In addition, referring to fig. 1 to 4, the present application also provides a battery pack including:

A case 10 having a first side wall 11 and a second side wall 12 disposed opposite to each other;

a case cover 20 covering the case 10 and enclosing the case 10 to form a closed accommodating cavity, and

As described above, in the battery module 30, the battery module 30 is disposed in the sealed accommodating cavity, the first hot end of the first thermoelectric effect 300 of the battery module 30 abuts against the first sidewall 11, and the second hot end of the second thermoelectric effect 400 of the battery module 30 abuts against the second sidewall 12.

In this embodiment, the first thermoelectric effect element 300 and the second thermoelectric effect element 400 are added on the outer side of the heat conducting component 200 of the battery module 30, and the heat generated at the position of the battery module 100 is directionally transferred from the inside of the battery module 100 to the outer edge thereof by introducing current into the first thermoelectric effect element 300 and the second thermoelectric effect element 400, so that the uniform heat dissipation of the battery module 30 is realized, the temperature uniformity, the charge-discharge performance and the heat dissipation effect of the battery module 30 are improved, and meanwhile, the heat dissipation efficiency of the battery module 100 is further improved by the integrated heat dissipation mode of the heat conducting component 200 and the first thermoelectric effect element 300 and the second thermoelectric effect element 400, so that the battery module 30 can be suitable for the heat dissipation requirement of high-power load operation, and the application range of the battery module 30 is improved. In addition, compared with the traditional liquid cooling heat dissipation method, the heat transfer operation of the first thermoelectric effect element 300 and the second thermoelectric effect element 400 is not limited by the ambient temperature, and the battery module 30 provided by the embodiment of the application has a wider environment application range and more application scenes.

Specifically, the battery pack is configured as a combined member including at least a case 10, a case cover 20, and a battery module 30, the case 10 may be a square case 10 having an opening through which the battery module 30 may be assembled in the case 10, the case cover 20 may be a direction cover for covering the opening of the case 10 to provide a sealed and safe operation space for the battery module 30, and the first and second thermoelectric elements 300 and 400 of the battery module 30 are respectively abutted on the first and second sidewalls 11 and 12 of the case 10. At this time, the heat transfer path of the battery cell assembly 100 includes at least two paths, i.e., the battery cell assembly 100, the first heat conducting member 210, the first thermoelectric effect member 300, the first side wall 11, and the surrounding environment, and the second path includes the battery cell assembly 100, the second heat conducting member 220, the second thermoelectric effect member 400, the second side wall 12, and the surrounding environment.

In an example, the battery pack may also be a cylindrical battery, a soft pack battery, or the like, which is not limited to the use scenario of the battery pack.

It should be understood that, referring to the above embodiments, the specific structure of the battery module 30 adopts all the technical solutions of all the embodiments, so that the battery pack has at least all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

In one possible embodiment, the first sidewall 11 is any one of planar, serrated, concave or convex. By the arrangement, the heat dissipation area of the first side wall 11 can be increased, and the heat dissipation efficiency and the heat dissipation effect are improved. Specifically, the first side wall 11 may be planar, so as to facilitate processing and reduce production cost. Or the first side wall 11 may be a serrated surface, a concave surface or a convex surface, so as to increase the contact area between the first side wall 11 and the surrounding environment, increase the heat dissipation area, and improve the heat dissipation efficiency and the heat dissipation effect.

In one possible embodiment, the second sidewall 12 is any one of planar, serrated, concave, or convex. By the arrangement, the heat dissipation area of the second side wall 12 can be increased, and the heat dissipation efficiency and the heat dissipation effect are improved. Specifically, the second side wall 12 may be planar to facilitate processing and reduce manufacturing costs. Or the second side wall 12 may be a serrated surface, a concave surface or a convex surface, so as to increase the contact area between the second side wall 12 and the surrounding environment, increase the heat dissipation area, and improve the heat dissipation efficiency and the heat dissipation effect.

In one possible embodiment, the battery pack is formed using a potting process. The heat transfer and heat conduction performance between components in the battery pack can be enhanced, heat dissipation is facilitated, the integrity of the components in the battery pack can be enhanced, the resistance to external impact, vibration and the like can be improved, meanwhile, the insulativity between the components and circuits can be improved, and the battery pack is beneficial to miniaturization and light-weight layout. In addition, the encapsulation process can also avoid direct exposure of internal components, circuits and the like to the environment, and can effectively improve the performances of water resistance, dust resistance, moisture resistance and the like of the battery pack.

In one possible embodiment, a plurality of battery modules 30 are provided, and a plurality of battery modules 30 are overlapped in the sealed accommodating chamber along the length direction Y of the case 10. By the arrangement, the running power of the battery pack can be improved by configuring a plurality of battery modules 30, so that the battery pack can meet high-power load carrying and the environment application range of the battery pack is improved. For example, three battery modules 30 may be disposed, and the three battery modules 30 are overlapped and disposed on the length direction Y of the box 10, where the first thermoelectric effect element 300 of each battery module 30 is abutted against the first side wall 11 of the box 10, and the second thermoelectric effect element 400 of each battery module 30 is abutted against the second side wall 12 of the box 10, so that heat dissipation of multiple battery modules 30 can be achieved simultaneously, and heat dissipation efficiency and heat dissipation effect of the battery modules 30 are improved.

In one possible embodiment, the battery module 30 further includes a third thermoelectric element 40, and the third thermoelectric element 40 is disposed at opposite sides of the battery module 30 along the length direction Y of the case 10.

In this embodiment, the specific configuration of the battery pack is further optimized. Specifically, the battery pack is configured to at least include a combination member of the case 10, the case cover 20, the battery module 30 and the third thermoelectric elements 40, the third thermoelectric elements 40 may be semiconductor thermoelectric material sheet members made of bismuth telluride, which may be provided in plurality, one battery module 30 is at least correspondingly provided with two third thermoelectric elements 40, and the two third thermoelectric elements 40 are arranged at intervals along the length direction Y of the case 10, so that heat dissipation to the upper and lower sides of the battery module 30 is achieved through the third thermoelectric elements 40, and heat dissipation efficiency and heat dissipation effect are further improved.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. A battery module, comprising:

The battery cell assembly is provided with a first radiating surface and a second radiating surface which are oppositely arranged;

the heat conduction assembly comprises a first heat conduction piece arranged on the first heat radiation surface and a second heat conduction piece arranged on the second heat radiation surface;

The first thermal electric effect piece is arranged on one side of the first heat conduction piece far away from the first heat radiation surface, the first cold end of the first thermal electric effect piece is connected with the first heat conduction piece, the first hot end of the first thermal electric effect piece is used for being connected with the first side wall of the box body of the battery pack, and

The second thermoelectric effect piece is arranged on one side, far away from the second radiating surface, of the second heat conduction piece, the second cold end of the second thermoelectric effect piece is connected with the second heat conduction piece, and the second hot end of the second thermoelectric effect piece is used for being connected with the second side wall of the box body.

2. The battery module of claim 1 wherein the first thermoelectric element comprises a first ceramic tile, a first thermocouple pair, a first conductor and a second ceramic tile, the first thermocouple pair being in electrical communication with the first ceramic tile and the second ceramic tile, respectively, through the first conductor, the first cold end being the first ceramic tile and the first hot end being the second ceramic tile, and/or,

The second thermoelectric effect piece comprises a third ceramic chip, a second thermoelectric couple pair, a second conductor and a fourth ceramic chip, wherein the second thermoelectric couple pair is respectively communicated with the third ceramic chip and the fourth ceramic chip through the second conductor, the second cold end is the third ceramic chip, and the second hot end is the fourth ceramic chip.

3. The battery module of claim 2, wherein the first thermally conductive member comprises a first abutment surface on a side of the first thermally conductive member remote from the first heat dissipation surface, the first cold end comprises a second abutment surface in abutment with the first abutment surface, the first abutment surface is any one of a planar surface, a convex surface, a concave surface, a multi-convex surface, or a multi-concave surface, and/or,

The second heat conduction piece comprises a third abutting surface, the third abutting surface is located on one side, away from the second heat dissipation surface, of the second heat conduction piece, the second cold end comprises a fourth abutting surface abutting against the third abutting surface, and the third abutting surface is any one of a plane, a convex surface, a concave surface, a multi-convex-surface or a multi-concave-surface.

4. The battery module of claim 3 wherein the first hot end includes a fifth abutment surface that abuts the first sidewall, the fifth abutment surface being any one of planar, convex, concave, multi-convex, or multi-concave, and/or,

The second hot end is in butt joint with the second side wall, and the sixth butt joint surface is any one of a plane, a convex surface, a concave surface, a multi-convex hull surface or a multi-concave groove surface.

5. The battery module of claim 1, wherein the first heat conductive member comprises a first heat conductive plate and a plurality of first heat conductive posts, the plurality of first heat conductive posts are arranged on the same side of the first heat conductive plate at intervals, the first heat conductive posts are inserted into the cell assembly, the first heat conductive plate is connected with the cell assembly through the plurality of first heat conductive posts and abuts against the first heat dissipation surface, and/or,

The second heat conduction piece comprises a second heat conduction plate and a plurality of second heat conduction columns, the second heat conduction columns are arranged on the same side of the second heat conduction plate at intervals, the second heat conduction columns are inserted into the cell module, and the second heat conduction plate is connected with the cell module through the second heat conduction columns and abuts against the second heat dissipation surface.

6. The battery module of claim 1, wherein the heat conduction assembly further comprises a first silicone pad and a second silicone pad, the first silicone pad is disposed between the first heat dissipation surface and the first heat conduction member, and the second silicone pad is disposed between the second heat dissipation surface and the second heat conduction member.

7. A battery pack, comprising:

the box body is provided with a first side wall and a second side wall which are oppositely arranged;

A box cover covered on the box body and enclosed with the box body to form a closed accommodating cavity, and

The battery module according to any one of claims 1 to 6, wherein the battery module is disposed in the closed accommodating cavity, a first hot end of a first thermoelectric effect element of the battery module is abutted against the first side wall, and a second hot end of a second thermoelectric effect element of the battery module is abutted against the second side wall.

8. The battery pack of claim 7, wherein the first sidewall is any one of planar, serrated, concave, or convex, and/or,

The second sidewall is any one of planar, serrated, concave, or convex.

9. The battery pack of claim 7, wherein the battery pack is formed by a potting process.

10. The battery pack according to claim 7, wherein a plurality of the battery modules are provided, and a plurality of the battery modules are disposed in the sealed accommodation chamber in an overlapping manner along the longitudinal direction of the case.

11. The battery pack of claim 10, further comprising third thermoelectric elements disposed on opposite sides of the battery module along a length direction of the case.