CN219979646U

CN219979646U - Thermal management board and battery pack

Info

Publication number: CN219979646U
Application number: CN202320851746.8U
Authority: CN
Inventors: 赵恒喜; 李左营; 刘振雨; 张本府; 谢科强; 赵晓涵; 权圣渊; 党奎; 江吉兵
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-11-07
Anticipated expiration: 2033-04-14

Abstract

The utility model relates to the technical field of battery thermal management, in particular to a thermal management plate and a battery pack. A thermal management plate for cooling a battery pack includes a plurality of plate members formed of plate member units connected end to end; the contact area of the plate units positioned in the middle of the plate and capable of being contacted with the battery pack is larger than the contact area of the plate units positioned at the two ends and capable of being contacted with the battery pack; the plurality of thermal management boards are arranged at intervals and matched with the plurality of battery cells to form a battery pack. The plate comprises a plurality of plate units with different areas, so that the contact area between the heat management plate and the battery cells at different positions is changed, and when cooling liquid in the heat management plate flows through the battery cells, more heat of the battery cells with higher temperature is taken away, so that the temperature consistency of all the battery cells is ensured, and the service lives of the battery cells and the battery pack are prolonged; the battery pack has good battery temperature uniformity.

Description

Thermal management board and battery pack

Technical Field

The utility model relates to the technical field of battery thermal management, in particular to a thermal management plate and a battery pack.

Background

Power batteries are one of the core components of electric vehicles, and charge and discharge are based on electrochemical reactions, so that safety, performance and life of the batteries are closely related to temperature. With the rapid development of electric automobile technology, it is important to improve the performance of the parts and accessories of the automobile and to ensure the working environment of the parts and accessories.

In the rapid development process of the electric automobile, the service life and the charge and discharge rate of the energy storage element battery are required to be higher and higher, but the battery pack of the electric automobile works in a severe thermal environment for a long time, so that the service life of the battery is shortened, and the battery performance is reduced. Therefore, in order to keep the power battery working normally, the temperature of the power battery needs to be controlled within a certain temperature range to ensure the performance and the service life, for example, the temperature of a lead-acid battery is between 35 and 40 ℃, the temperature of a nickel-hydrogen battery is between 0 and 40 ℃, and the temperature of a lithium ion battery is between-20 and 75 ℃.

The current mainstream battery cell type in the market includes cylinder battery cell, square battery cell and soft packet battery cell, and big cylinder battery or square battery cell can produce heat in charge and discharge to take away the heat through the coolant liquid that flows in thermal management board, perhaps when the battery cell temperature is lower under the environment of low temperature, heat the battery cell through the coolant liquid in the thermal management board.

However, due to the fact that the temperature difference exists between the inlet and outlet cooling liquid of the heat management plate and the influence of factors such as poor heat dissipation of the battery cells at the position closer to the middle part, the consistency of the temperature of the battery cells is poor, the temperature field in the battery box is in a state of long-term uneven distribution, the performances of each battery module and each single body are unbalanced, and the service life of the battery cells is seriously influenced.

Disclosure of Invention

The utility model aims at: aiming at the problem that the service life of the battery core is lower due to the fact that the temperature difference of the battery core at different positions is larger when the battery core is cooled by the thermal management plate in the prior art, the thermal management plate capable of improving the temperature uniformity of the battery core and the battery pack using the thermal management plate are provided.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a thermal management board for thermally managing a battery pack includes a plurality of boards formed of board units connected end to end;

the contact area of the plate units positioned in the middle of the plate and capable of being contacted with the battery pack is larger than the contact area of the plate units positioned at the two ends and capable of being contacted with the battery pack.

The principle of the heat management plate for cooling the battery cells is that a cooling liquid pipeline is connected with joints at two ends of the heat management plate, and the cooling liquid flows in the plate and passes through heat conduction band to heat the battery cells. However, at the cooling liquid inlet, most of heat of the battery cells is taken away by the cooling liquid through heat conduction due to overlarge temperature difference between the cooling liquid and the battery cells, and meanwhile, the temperature of the cooling liquid is increased, and along with the flowing of the cooling liquid, when the battery cells at the back are cooled, less and less heat can be absorbed by the cooling liquid according to the heat balance principle. In the battery pack formed by combining the plurality of electric cores, the electric core heat dissipation capacity at the middle position is poorer than that of the electric core at the edge and the temperature is higher, but before the cooling liquid flows through the electric core at the center position, the temperature is extremely high, so that the cooling liquid is unfavorable for cooling the electric core at the middle position, and the electric core temperature difference at different positions is larger after all the electric cores are cooled or cooled within the normal working temperature.

The battery cells arranged on one side or two sides of the thermal management board are simulated by software to obtain the change rule of the working temperature of the battery cells when all the battery cells are arranged along the length direction of the plate, so that the thermal management board structure is optimized to achieve the purpose of battery temperature equalization.

The heat management plate comprises a plurality of plate units with different areas, and all the plate units are connected end to form a plate for containing cooling liquid to circulate. According to the temperature of the battery cells at different positions during operation, the contact area of the plate units corresponding to the same positions during contact with the battery cells is determined, so that the contact area of the plate units with the battery cells corresponds to the temperature of the battery cells, namely: the high-temperature battery cell corresponds to the plate unit with larger contact area, and the low-temperature battery cell corresponds to the plate unit with smaller contact area, so that the temperature of the battery cell in the battery pack is consistent.

Compared with the prior art that the temperature difference between the electric cores at different positions is too large after the electric cores are cooled by the thermal management board, so that the service life of the electric cores is lower. The heat management plate formed by splicing the plate units with different areas changes the contact area between the heat management plate and the battery cell, so that when the cooling liquid in the heat management plate flows through the battery cell, more heat of the battery cell with higher temperature is taken away, the heat loss of the battery cell at the cooling liquid inlet is reduced, the temperature difference of the battery cell at different positions is reduced, and the service lives of the battery cell and the battery pack are prolonged.

As a preferable mode of the present utility model, all the plate member unit areas gradually decrease from the middle to both ends along the length direction of the plate member.

When the electric cores are arranged on one side or two sides of the thermal management plate and are arranged along the length direction of the plate, the temperature of all the electric cores is reduced from the middle to the two ends, and the area of the plate unit attached to the electric core with higher temperature is larger, so that the area of all the plate units is sequentially reduced from the middle to the two ends. The height or diameter of the plate element can be changed to change the area under the condition that the control basic parameters are unchanged.

As a preferable mode of the utility model, the plate unit height of the plate at the middle position is larger than the plate unit height at the two ends.

The battery cell corresponding to the plate unit in the middle of the plate has higher working temperature; meanwhile, the heat dissipation capacity is poor relative to the battery cells at the two ends of the plate, so that the height of the plate unit at the middle position is larger than that of the plate units at the two ends.

As a preferred embodiment of the present utility model, the plate units have the same width, and the heights of the plate units gradually increase from both ends to the middle of the plate.

The plate element can be a square straight plate or an arc plate, and if the contact area is to be calculated, the calculation mode of the plate element can be equivalent to dividing the width into the product of infinite calculus units and then multiplying the product by the height. Thus, the larger the area, the higher the height, with the same width.

If the plate unit is only an arc plate, the diameter of the plate unit is changed on the premise of not changing the height, and the smaller the diameter is, the larger the contact area between the plate unit and the battery cell is. According to the arranged and distributed battery cells, the change rule of the working temperature of the battery cells can be obtained, the contact area between the plate units and the battery cells is gradually reduced from the middle to the two sides, and the larger the contact area is, the smaller the diameter of the plate units is, so that the diameter of the plate units is gradually increased from the middle to the two ends of the thermal management plate.

As a preferable scheme of the utility model, the height difference of two adjacent plate units is reduced stepwise or smoothly gradually from the middle to two ends along the length direction of the plate.

The top ends of two adjacent plate units are in stepped connection or smooth transition connection, and the height difference is gradually reduced along with the change from the middle to the two ends.

As a preferable scheme of the utility model, the plate units are metal thin-wall cavities, and all the plate units are mutually communicated.

The plate units which are mutually communicated form the thin-wall formed plate with the hollow middle, and the cooling liquid flows through the plate, so that the cooling efficiency of the plate is improved, the plate is arranged into a thin-wall cavity, the flow of the cooling liquid is increased, and the purpose of cooling the battery cell is better achieved. And after the plate is arranged into the thin-wall cavity, the energy density of the battery is high, so that certain requirements are met on the material corresponding to the plate, but the economic cost of part of light high-density materials is high, so that the plate can be made of high-strength and high-density aluminum alloy materials or other materials with the strength and the height meeting the requirements of the plate.

As a preferable mode of the utility model, each plate unit is an arc-shaped plate, and the plates formed by all the plate units are wave-shaped plates.

The plate unit of an arc plate shape is used for cooling the cylindrical battery.

As a preferred embodiment of the present utility model, each of the plate units is a straight plate.

The straight plate is used for cooling the square battery.

As a preferable scheme of the utility model, the surface of each plate unit is coated with a heat conducting cushion layer.

The heat conduction cushion layer can enable the battery core to be attached to the heat management plate better, and meanwhile heat conduction efficiency between the heat management plate and the battery core is improved.

A battery pack comprises the thermal management board and a plurality of electric cores, wherein all the electric cores are arranged in an array; all the heat management plates are arranged at intervals side by side, a row of battery cells are arranged between two adjacent heat management plates, and the heat management plates are abutted with the side surfaces of the battery cells on two sides or one side of each heat management plate.

Generally, the battery cells commonly used in the power battery at present are cylindrical battery cells, so the battery pack should include a plurality of cylindrical battery cells and the thermal management plates, and all the thermal management plates are arranged side by side at intervals.

The heat management board both sides are equipped with respectively the feed liquor end with go out the liquid end, in order to improve the injection efficiency of coolant liquid, will all the both ends of heat management board are all parallelly connected, namely: all liquid inlet ends are connected in parallel, all liquid outlet ends are connected in parallel, cooling liquid enters the thermal management plate from the liquid inlet ends, flows through the thermal management plate and takes away heat on the battery cells attached to all the thermal management plate, heat exchange is achieved, and then the cooling liquid flows out from the liquid outlet ends.

According to the battery pack, the heat management plates formed by the plate units with different areas are correspondingly obtained according to the temperature distribution rules of the battery cells at different positions, namely, the battery cells with higher working temperatures are correspondingly obtained, the areas of the corresponding plate units are larger, so that more heat of the battery cells is taken away, the battery cells with lower working temperatures are correspondingly obtained, the areas of the corresponding plate units are smaller, and the two battery cells are combined, so that the temperature uniformity of all the battery cells in the battery pack is improved, and the purpose of efficiently cooling the battery pack is achieved.

As a preferable scheme of the utility model, the electric cores are arranged on two sides of the plate, and the electric cores are alternately arranged on two sides of the plate along the length direction of the plate.

When the battery cell is a cylindrical battery, the plate units are arc-shaped plates, the adjacent two plate units face opposite directions, and the intrados of each plate unit is attached to the battery cell.

If the battery cell is a cylindrical battery, the plate should be a wavy plate correspondingly, and each plate unit has at least one cambered surface attached to the battery cell. In order to cool the battery cells positioned at two sides of the plate units and ensure the cooling effect, the directions of the two adjacent plate units are opposite, so that two sides of each battery cell are attached to the plate units, and the battery cells are cooled better.

If the electric core is a square battery, the plate unit is a straight plate. And the two sides of the plate unit are respectively attached to the electric cores at the two sides, and when the cooling liquid in the plate flows through the electric cores, the heat of the electric cores is taken away through heat conduction, so that the cooling effect is achieved.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. according to the thermal management board, when all the electric cores are distributed along the length direction of the thermal management board, the temperature change rule among the electric cores at different positions is set, a plate formed by a plurality of plate units with different areas is arranged, the higher the working temperature of the electric core is, the larger the contact area between the plate unit matched with the plate unit and the electric core is, the lower the working temperature of the electric core is, and the smaller the contact area between the plate unit matched with the plate unit and the electric core is. The heat management plate formed by splicing the plate units with different areas changes the contact area between the heat management plate and the battery cell, so that when the cooling liquid in the heat management plate flows through the battery cell, more heat of the battery cell with higher temperature is taken away, the heat loss of the battery cell at the cooling liquid inlet is reduced, the temperature difference of the battery cell at different positions is reduced, and the service lives of the battery cell and the battery pack are prolonged.

2. According to the battery pack, the thermal management plates spliced by the plate units with different areas are correspondingly obtained according to the temperature distribution rule of the battery cells at different positions, so that the temperature difference of all the battery cells in the battery pack is reduced, and the purpose of efficiently cooling the battery pack is achieved.

Drawings

FIG. 1 is a thermal simulated temperature cloud for an internal cell of a battery pack according to example 1 of the present utility model;

FIG. 2 is a schematic diagram of a thermal management plate according to embodiment 1 of the present utility model;

FIG. 3 is a front view of a thermal management plate according to embodiment 1 of the present utility model;

FIG. 4 is a top view of a thermal management plate according to embodiment 1 of the present utility model;

FIG. 5 is a schematic view of a thermal management plate structure according to another embodiment 2 of the present utility model;

fig. 6 is a schematic structural view of a battery pack according to embodiment 3 of the present utility model;

fig. 7 is a top view of a battery pack according to embodiment 3 of the present utility model.

The marks in the figure: 100-battery pack, 10-heat management board, 1-plate, 11-plate unit, 20-cell, 2-connector, 3-liquid inlet end, 4-liquid outlet end, 5-unidirectional runner and 6-heat conduction cushion layer.

Detailed Description

The present utility model will be described in detail with reference to the accompanying drawings.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

The principle of cooling the battery cells 20 by the heat management plate 1 is to connect a coolant pipe with the joints 2 at the two ends of the heat management plate 10, wherein the coolant flows in the plate 1 and passes through the heat conduction band to heat the battery cells 20. However, at the cooling liquid inlet, the cooling liquid takes away most of the heat of the battery cell 20 through heat conduction due to the overlarge temperature difference between the cooling liquid and the battery cell 20, and meanwhile, the temperature of the cooling liquid is increased, so that when the battery cell 20 behind is cooled along with the flow of the cooling liquid, less and less heat can be absorbed by the cooling liquid according to the heat balance principle.

In order to obtain the change rule of the temperature of the battery cells 20 more accurately, all the battery cells 20 in the battery pack are thermally simulated by using the CFD, and the temperatures of the battery cells 20 at different positions of the thermal management board 10 are identified according to the thermal simulated temperature cloud images, wherein the simulated cloud images are shown in fig. 1. As can be seen from the temperature cloud chart, the temperature of the region I located in the central region is highest, and then the temperature of the region I is highest, and the region II and the region III are next highest, so that the battery pack formed by combining a plurality of battery cells 20 can be obtained, the heat dissipation capacity of the battery cells 20 located in the middle position is poorer than that of the battery cells 20 located at the edges and the temperature of the battery cells 20 is higher, and the temperature of the battery cells 20 decreases from the middle to the two ends.

However, the temperature of the cooling liquid is extremely high before the cooling liquid flows through the cells 20 at the central position, so that the cooling liquid is unfavorable for cooling the cells 20 at the central position, and the temperature difference between the cells 20 at different positions is larger after all the cells 20 are cooled or cooled within the normal working temperature.

According to the thermal management board 10 of the present utility model, as shown in fig. 2, plate units 11 with different areas and adapted to the battery pack are provided according to the operating temperatures of the battery cells 20 at different positions in the battery pack to form a plate 1, so as to ensure the temperature uniformity of the battery pack.

A thermal management board 10 as described above for cooling a battery pack, comprising a plurality of panel units 11 connected end to form a panel 1; the contact area of the plate unit 11 of the plate 1 at the middle position, which can be in contact with the battery pack, is larger than the contact area of the plate units 11 at the both ends, which can be in contact with the battery pack.

The plate units 11 which are mutually communicated form the thin-wall formed plate 1 with the hollow middle, and the cooling liquid flows through the plate 1, so that the plate 1 is arranged into a thin-wall cavity for improving the cooling efficiency of the plate 1, the flow of the cooling liquid is increased, and the purpose of cooling the battery cell 20 is better achieved. And because the plate 1 is arranged into a thin-wall cavity, the energy density of the battery is high, so that certain requirements are met for the material of the plate 1, but the economic cost of part of light high-density materials is high, and therefore, the material of the plate 1 can be selected from high-strength and high-density aluminum alloy materials or other materials with the strength and the height meeting the requirements of the plate 1.

As shown in fig. 3, when the cells 20 disposed on one side or both sides of the thermal management board 10 are arranged along the length direction of the board 1, namely: when the cells 20 are arranged in the longitudinal direction indicated by the arrow in fig. 3, the temperature of each cell 20 decreases from the middle to the two ends, and the area of the plate member 11 attached to the cell 20 having a higher temperature is larger, so that the area of each plate member 11 gradually decreases from the middle to the two ends. In the case where the control basic parameters are unchanged, as shown in fig. 3 and 4, the height or diameter of the panel unit 11 may be changed to change the area.

If the areas of the plate units 11 are different by the different heights, the working temperature of the battery cells 20 corresponding to the plate units 11 in the middle of the plate 1 is higher; meanwhile, the heat dissipation capacity is poor with respect to the cells 20 at both ends of the board 1, and thus the board units 11 at the middle position are higher than the board units 11 at both ends. Further, since the plate unit 11 may be a square straight plate or an arc plate, the larger the area, the higher the height, with the same width. To calculate the contact area, whether it be an arcuate or a straight plate, the calculation may be equivalent to dividing the width into the product of infinite calculus elements, which is then multiplied by the height. The width thereof is defined as the distance of each panel unit 11 from the left end to the right end of the same straight line.

Similarly, if the plate unit 11 is only an arc plate, the smaller the diameter of the plate unit 11 is, the larger the contact area with the battery cell 20 is, without changing the height. According to the operating temperature change rule of the arranged and distributed battery cells 20, the contact area between the plate unit 11 and the battery cells 20 is gradually reduced from the middle to the two sides, and the larger the contact area is, the smaller the diameter of the plate unit 11 is, so that the diameter of the plate unit 11 gradually increases from the middle to the two ends of the thermal management board 10.

In order to further increase the efficiency of the thermal management plate 10, a thermally conductive pad layer 6 is provided on the surface of each plate element 11. The heat conduction cushion layer 6 can enable the battery cell 20 to be better attached to the thermal management board 10, and meanwhile, the heat conduction efficiency between the thermal management board 10 and the battery cell 20 is improved.

The beneficial effects of this embodiment include: according to the thermal management board 10 of the utility model, according to the temperature change rule among the electric cores 20 at different positions when all the electric cores 20 are distributed along the length direction of the thermal management board 10, the plate 1 formed by a plurality of plate units 11 with different areas is arranged, the area of the electric cores 20 with higher working temperature is arranged, the contact area of the plate units 11 matched with the electric cores is larger, the contact area of the electric cores 20 with lower working temperature is arranged, and the contact area of the plate units 11 matched with the electric cores is smaller. According to the thermal management board 10 formed by splicing the plate units 11 with different areas, the contact area between the thermal management board 10 and the battery cells 20 is changed, so that when cooling liquid in the thermal management board 10 flows through the battery cells 20, more heat of the battery cells 20 with higher temperature is taken away, the heat loss of the battery cells 20 at the cooling liquid inlet is reduced, the temperature difference of the battery cells 20 at different positions is reduced, and the service lives of the battery cells 20 and the battery pack are prolonged.

Example 2

In the thermal management board 10 of embodiment 1, if the area of the board unit 11 is changed by changing the height, the form may be that the whole board 1 is designed to be gradually changed as shown in fig. 5, instead of the step-like form shown in fig. 2, that is, the top ends of all the board units 11 in the thermal management board 10 form a smooth curve, and at the same time, the height difference between two adjacent board units 11 gradually decreases from the middle to the two ends.

Example 3

As shown in fig. 6 and 7, a battery pack 100 employs a heat management plate 10 according to embodiment 1 or embodiment 2, in which a unidirectional flow passage 5 extending in the longitudinal direction of the heat management plate 10 is provided in the heat management plate 10, and a liquid inlet end 3 and a liquid outlet end 4 of the heat management plate 10 are provided at both ends of the flow passage, respectively.

The liquid working medium or cooling liquid uniformly flows into each thermal management plate 10 from the inlet at the left end, namely the liquid inlet end 3, so that the thermal management plates 10 indirectly contact-cool the cylindrical battery cells 20, and then the cooling liquid flows out from the liquid outlet end 4 at the right end of the thermal management plates 10.

All liquid inlet ends 3 can be singly connected with a cooling liquid pipeline, all liquid inlet ends 3 can be connected in parallel, all liquid outlet ends 4 can be connected in parallel, the cooling liquid pipeline enters all heat management plates 10 from the liquid inlet ends 3 connected in parallel, flows through the heat management plates 10 and takes away heat on the electric cores 20 attached to all plate units 11, heat exchange is realized, and then flows out from the liquid outlet ends 4 connected in parallel.

Generally, the battery cells 20 commonly used in the power battery at present are cylindrical batteries, so the battery pack 100 of the present utility model comprises the thermal management board 10 and a plurality of cylindrical battery cells 20, and all battery cells 20 are arranged in an array; all the heat management boards 10 are arranged side by side at intervals, a row of electric cores 20 are arranged between two adjacent heat management boards 10, and the heat management boards 10 are abutted with the outer peripheral surfaces of the electric cores 20 on two sides or one side of each heat management board.

In addition, in general, the cells 20 are disposed on two sides of the board 1, and all the cells 20 are alternately disposed on two sides of the board 1 along the length direction of the board 1. In the case of a cylindrical battery cell 20, the plate 1 should be a corrugated plate 1. In order to cool the cells 20 located at both sides of the plate units 11 and ensure the cooling effect, the directions of the adjacent two plate units 11 are opposite, so that both sides of each column of cells 20 are attached to the plate 1, that is, the intrados of each plate unit 11 is attached to the cell 20, thereby better cooling the cell 20.

In the case of a square battery, the plate member 1 is a straight plate. Wherein, each plate unit 11 is also a straight plate, two sides of the plate unit 11 are respectively attached to the electric cores 20 at two sides, and when the cooling liquid in the plate 1 flows through the electric cores 20, the heat of the electric cores 20 is conducted through the heat conduction belt, so that the cooling effect is achieved.

The beneficial effects of this embodiment include: according to the battery pack 100, the thermal management board 10 spliced by the plate units 11 with different areas is correspondingly obtained according to the temperature distribution rule of the battery cells 20 at different positions, so that the temperature difference of all the battery cells 20 in the battery pack is reduced, and the purpose of efficiently cooling the battery pack 100 is achieved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A thermal management plate for thermal management of a battery pack, characterized by comprising a plate (1) formed by a plurality of plate units (11) connected end to end;

the contact area of the plate unit (11) which is positioned at the middle part of the plate (1) and can be contacted with the battery pack is larger than the contact area of the plate unit (11) which is positioned at the two ends and can be contacted with the battery pack.

2. A thermal management plate according to claim 1, wherein the area of the plate element (11) decreases gradually from the middle to both ends along the length of the plate element (1).

3. A thermal management plate according to claim 1, wherein the height of the plate element (11) of the plate element (1) at the middle position is larger than the height of the plate element (11) at both ends.

4. A thermal management plate according to claim 3, wherein all of said plate elements (11) have the same width, and wherein all of said plate elements (11) have a height which increases gradually from both ends of said plate element (1) toward the middle.

5. A thermal management plate according to claim 4, wherein the height difference between adjacent two of said plate units (11) decreases stepwise or smoothly from the middle to both ends along the length of said plate (1).

6. A thermal management plate according to claim 1, wherein said plate elements (11) are thin-walled cavities of metal, all of said plate elements (11) being in communication with each other.

7. A thermal management plate according to any one of claims 1-6, wherein each of said plate elements (11) is an arcuate plate, and wherein said plate (1) formed by all of said plate elements (11) is a wave-shaped plate.

8. A thermal management plate according to any one of claims 1-6, wherein each of said plate elements (11) is a straight plate.

9. A thermal management plate according to any one of claims 1-6, wherein the surface of each of said plate elements (11) is coated with a heat conducting backing layer.

10. A battery pack, characterized by comprising a number of thermal management plates (10) according to any one of claims 1-9 and a number of cells (20), all of said cells (20) being arranged in an array;

all the thermal management plates (10) are arranged at intervals side by side, a row of electric cores (20) are arranged between two adjacent thermal management plates (10), and the thermal management plates (10) are abutted with the side surfaces of the electric cores (20) on two sides or one side of each thermal management plate.

11. A battery pack according to claim 10, wherein the cells (20) are provided on both sides of the plate (1), and the cells (20) are alternately provided on both sides of the plate (1) along the length direction of the plate (1).