Cooling piece and battery pack
By designing a cooling member with a cooling side plate with a runner part and a buffer part, the problem of poor heat dissipation effect of the battery cell in the fast charging field and structural deformation during expansion is solved, and the dual effects of efficient heat dissipation and structural stability are achieved.
Patent Information
- Application Number
- CN202421011902.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-05-10
AI Technical Summary
The existing battery cell cooling structure is difficult to meet the demand for efficient heat dissipation in the fast charging field, and the lack of effective buffering when the battery cell expands, which easily leads to structural deformation.
A cooling member is designed, including a cooling base plate and a heat-conducting cooling side plate, which has a runner portion and a buffer portion. The runner section circulates the cooling medium through the cooling runner for heat dissipation, and the buffer section absorbs the expansion force of the electric core through the buffer cavity to prevent structure deformation.
Multi-faceted heat dissipation of the battery cell is achieved, the heat dissipation effect of the battery cell is enhanced, and expansion buffer is provided for the battery cell through the buffer cavity, ensuring the stability of the battery cell structure.
Smart Images
Figure CN222801878U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of batteries, specifically to a cooling component and a battery pack. Background Technology
[0002] In related technologies, cooling plates for heat dissipation of battery cells are typically placed at the bottom of the cell, using a cooling medium to carry away heat from the bottom, thus achieving a heat dissipation effect. However, in this structure, the cooling plate can only dissipate heat from the bottom of the cell, and its heat dissipation effect is generally limited. Furthermore, battery cells are increasingly moving towards fast charging with gradually increasing charging power, and the aforementioned structure is unlikely to meet the heat dissipation requirements of future fast charging in the market. Utility Model Content
[0003] The embodiments of this utility model provide a cooling component and a battery pack that can solve the problem of overheating of battery cells.
[0004] In a first aspect, embodiments of the present invention provide a cooling component, comprising:
[0005] Cooling base plate, used to support the bottom of the battery cell; and
[0006] The cooling side plate is bent and connected to one side of the cooling base plate, and is used to abut against and thermally connect to one side of the battery cell;
[0007] The cooling side plate includes a flow channel section and a buffer section; the flow channel section is provided with one or more cooling channels, each cooling channel being used to circulate cooling medium; the buffer section is provided with a buffer cavity, which extends along the length direction of the cooling side plate.
[0008] In one embodiment, the buffer cavity is located on one side of a plurality of cooling channels, and the distance between two adjacent cooling channels is less than the distance between the buffer cavity and the cooling channel adjacent to the buffer cavity.
[0009] In one embodiment, the buffer cavity is located on the side of the plurality of cooling channels near the cooling base plate.
[0010] In one embodiment, the size of the buffer cavity is the same as the size of each cooling channel.
[0011] In one embodiment, the thickness of the cooling side plate is 3 mm to 8 mm, the width of the cooling channel is 1.5 mm to 7 mm, and the width of the buffer cavity is 1.5 mm to 7 mm.
[0012] In one embodiment, the thickness of the cooling base plate is less than or equal to the thickness of the cooling side plate, and the thickness of the cooling base plate is 2 mm to 8 mm.
[0013] In one embodiment, the cooling component further includes two manifolds, with the two ends of the flow channel portion extending beyond the two ends of the buffer portion. The two manifolds are installed at the two ends of the flow channel portion so that the manifold cavity of each manifold is connected to multiple cooling channels.
[0014] Secondly, embodiments of the present invention provide a battery pack, including a plurality of battery cells as described in the first aspect and a plurality of cooling components as described in the first aspect.
[0015] In one embodiment, each battery cell has an adjacent cooling element on one side of its corresponding cooling element, and the adjacent cooling element is thermally connected to the other side of the battery cell.
[0016] In one embodiment, the battery pack further includes a heat insulation assembly comprising a plurality of heat insulation elements, each heat insulation element being located between two adjacent cells in the length direction of the cooling side plate, the thickness of the heat insulation element being 0.1 mm to 2 mm, and the thermal conductivity of the heat insulation element being 0.05 W / (m·K) to 1 W / (m·K).
[0017] This utility model provides a cooling component and a battery pack. The cooling component includes a cooling base plate for supporting the bottom of the battery cell and a cooling side plate thermally connected to one side of the battery cell. The cooling side plate includes a flow channel and a buffer section. At least one cooling channel in the flow channel allows cooling medium to circulate, dissipating heat to the side of the battery cell. Simultaneously, a buffer cavity in the buffer section provides cushioning for the battery cell when it expands due to heat, preventing significant deformation of the battery cell structure. This cooling component not only dissipates heat from the battery cell but also buffers its expansion, ensuring the stability of the battery cell structure. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of the cooling component provided in an embodiment of this utility model;
[0020] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the diagram;
[0021] Figure 3 This is a schematic diagram of the current collector provided in an embodiment of the present utility model;
[0022] Figure 4 yes Figure 3 A schematic diagram of the flow collector installed in the flow channel section;
[0023] Figure 5 yes Figure 4 Enlarged schematic diagram of part B in the middle;
[0024] Figure 6 This is a schematic diagram of the battery pack provided in an embodiment of the present invention;
[0025] Figure 7 yes Figure 6 Exploded view;
[0026] Figure 8 yes Figure 5 A schematic diagram of the structure of multiple battery cells and multiple cooling components;
[0027] Figure 9 yes Figure 8 A schematic diagram of the structure of two adjacent battery cells;
[0028] Figure 10 yes Figure 9 A structural diagram of section C;
[0029] Explanation of reference numerals in the attached figures:
[0030] 1000 Cooling components; 1100 Cooling base plate; 1200 Cooling side plate; 1300 Current collector; 1500 Fixing components; 1310 Current collector cavity; 1111 Cooling flow channel; 1112 Buffer cavity; 2000 Battery pack; 2100 Piping components; 2200 Cooling plate; 2300 Fixing components; 2400 Heat insulation components; 2500 Battery cell. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.
[0032] An embodiment of this utility model provides a cooling component 1000. Please refer to... Figure 1 and Figure 2 , Figure 1 This is a structural schematic diagram of the cooling component 1000 provided in this embodiment of the utility model. Figure 2 yes Figure 1 The diagram shows the structure of part A. The cooling component 1000 includes a cooling base plate 1100 and a cooling side plate 1200. The cooling base plate 1100 supports the battery cell 2500 (see...). Figure 7 At the bottom of the battery cell 2500, a cooling side plate 1200 is bent and connected to one side of the cooling base plate 1100 along its length, abutting against and thermally connecting to one side of the battery cell 2500, for absorbing the heat generated by the battery cell 2500. The cooling side plate 1200 includes a flow channel portion and a buffer portion, and the flow channel portion is provided with one or more cooling flow channels 1111, each cooling flow channel 1111 for flowing cooling medium to dissipate heat from the battery cell 2500. The buffer portion is provided with a buffer cavity 1112, and the buffer cavity 1112 extends along the length of the cooling side plate 1200, the buffer cavity 1112 for providing cushioning when the battery cell 2500 expands.
[0033] Specifically, since the cooling side plate 1200 is thermally connected to one side of the battery cell 2500, after the cooling medium enters from one end of the cooling channel 1111, the cooling medium flowing through the cooling channel 1111 can absorb a portion of the heat from one side of the battery cell 2500 and then flow out from the other end of the cooling channel 1111, thereby achieving the effect of heat dissipation for the battery cell 2500. The buffer cavity 1112 has a hollow structure and does not allow cooling medium to flow through it. When the battery cell 2500 expands, due to the presence of the buffer cavity 1112 in the buffer section, the side of the battery cell 2500 closest to the cooling side plate 1200 compresses the cooling side plate 1200, causing the buffer cavity 1112 to deform towards the hollow area to absorb the expansion force generated by the battery cell 2500.
[0034] In this embodiment, the cooling side plate 1200, which includes a flow channel and a buffer section, not only dissipates heat from the battery cell 2500 but also provides a buffer for the expansion of the battery cell 2500, thus ensuring the stability of the battery cell 2500 structure. It should be noted that in this embodiment, both the cooling flow channel 1111 and the buffer cavity 1112 extend from one end of the cooling side plate 1200 along its length to the other end, and their orthographic projection on the cooling side plate 1200 is rectangular. However, this does not imply a limitation on the structure of the cooling flow channel 1111 or the buffer cavity 1112. In some embodiments, the structure of the cooling flow channel 1111 and / or the buffer cavity 1112 can be other shapes. For example, the orthographic projection of the cooling flow channel 1111 and / or the buffer cavity 1112 on one side of the cooling side plate 1200 can be Z-shaped, S-shaped, etc.
[0035] In some embodiments, please refer to Figure 2The buffer cavity 1112 is located on one side of the plurality of cooling channels 1111, and the distance between two adjacent cooling channels 1111 is less than the distance between the buffer cavity 1112 and a cooling channel 1111 adjacent to the buffer cavity 1112.
[0036] Specifically, a collector device is often required on both sides of the cooling channel 1111 to distribute the cooling medium to each cooling channel 1111 through the collector device at the cooling medium inlet of the cooling channel 1111 to dissipate heat from the battery cell 2500, and to collect the cooling medium output from each cooling channel 1111 through the collector device at the cooling medium outlet of the cooling channel 1111 and discharge it to a designated location.
[0037] In this embodiment, the buffer cavity 1112 is located on one side of multiple cooling channels 1111, so that the design of the collector only needs to consider the size of each cooling channel 1111 and the spacing between them, resulting in a simpler collector structure. However, if the buffer cavity 1112 is located between two adjacent cooling channels 1111, the design of the collector needs to consider how to prevent the cooling medium from flowing into the buffer cavity 1112, thus making the collector structure more complex.
[0038] Because the cooling medium inlet and outlet of the collector and cooling channel 1111 must meet sealing conditions to ensure the isolation of the cooling medium from the buffer cavity 1112 and other components, this embodiment limits the distance between two adjacent cooling channels 1111 to be smaller than the distance between the buffer cavity 1112 and the cooling channel 1111 near the buffer cavity 1112. That is, the distance between the buffer cavity 1112 and the cooling channel 1111 near the buffer cavity 1112 is larger, and the distance between two adjacent cooling channels 1111 is smaller. This design can ensure the airtightness of the collector when sealing multiple cooling channels 1111, even when there are manufacturing tolerances in various components. If the distance between the buffer cavity 1112 and the cooling channel 1111 near the buffer cavity 1112 is smaller, the cooling medium in the collector may flow into the buffer cavity 1112 due to the manufacturing tolerance of the components, or the cooling medium may come into contact with other components, thus causing danger. The reason for limiting the distance between two adjacent cooling channels 1111 to be small is that, with a fixed channel height, more cooling channels 1111 can be set up to enhance the cooling component 1000's ability to dissipate heat from the battery cell 2500.
[0039] In some embodiments, the size of the buffer cavity 1112 is the same as the size of each cooling channel 1111. Specifically, the width of the buffer cavity 1112 and each cooling channel 1111 in the thickness direction and the height in the height direction of the cooling side plate 1200 are the same. In this embodiment, limiting the size of the buffer cavity 1112 to be the same as the size of each cooling channel 1111 simplifies the manufacturing process of the cooling side plate 1200, eliminating the need to design and manufacture the buffer cavity 1112 and the cooling channel 1111 separately due to differences in the aforementioned data, thus reducing production time. Furthermore, the equal height and width of the buffer cavity 1112 and the cooling channel 1111 also ensures a more uniform distribution of the expansion force exerted by the battery cell 2500 on the cooling side plate 1200 when the battery cell 2500 expands, thereby enhancing the compressive strength of the cooling side plate 1200.
[0040] In some embodiments, the thickness of the cooling side plate 1200 is 3 mm to 8 mm, the width of the cooling channel 1111 is 1.5 mm to 7 mm, and the width of the buffer cavity 1112 is 1.5 mm to 7 mm.
[0041] Given a fixed height for the cooling channel 1111, and considering the amount of cooling medium flowing through the cooling channel 1111 per unit time and the strength of the cooling side plate 1200, experimental data shows that the width of the cooling channel 1111 is designed to be between 1.5mm and 7mm. Within this width range, the amount of cooling medium flowing through the cooling channel 1111 per unit time is sufficient to meet the heat dissipation requirements of the battery cell 2500. The thickness of the cooling side plate 1200 is designed to be between 3mm and 8mm. Within this thickness range, the strength of the cooling side plate 1200 is also sufficient, and it occupies relatively little space. In order to ensure a more uniform distribution of the expansion force exerted by the battery cell 2500 on the cooling side plate 1200 when the battery cell 2500 expands, the width of the buffer cavity 1112 is designed to be equal to the width of the cooling channel 1111, which is also between 1.5mm and 7mm.
[0042] In some embodiments, the thickness of the cooling base plate 1100 is less than or equal to the thickness of the cooling side plate 1200, and the thickness of the cooling base plate 1100 is 2 mm to 8 mm.
[0043] Experimental data shows that the thickness of the cooling base plate 1100 is designed to be 2mm to 8mm. At this thickness, the cooling base plate 1100 is strong enough to support multiple 2500 battery cells, while also occupying a relatively small space.
[0044] In some embodiments, reference may be made to Figure 3 , Figure 4 and Figure 5 , Figure 4 yes Figure 3A schematic diagram of the structure of the manifold 1300 and the flow channel section. Figure 4 yes Figure 3 A schematic diagram of the structure in which the flow collector 1300 is fixed to the flow channel section. Figure 5 yes Figure 4 The structural diagram of part B is shown. The cooling component 1000 also includes two manifolds 1300. The two ends of the flow channel portion extend beyond the two ends of the buffer portion. The two manifolds 1300 are installed at the two ends of the flow channel portion so that the manifold cavity 1310 of each manifold 1300 is connected to multiple cooling flow channels 1111.
[0045] In this embodiment, the two ends of the flow channel are defined to extend beyond the two ends of the buffer section to ensure that a height difference is formed between the flow channel and the buffer section, so that the flow collector 1300 can be snapped into the two ends of the flow channel and kept fixed, so as to satisfy the stability of the flow collector cavity 1310 of each flow collector 1300 when transmitting cooling medium after connecting multiple cooling channels 1111.
[0046] This utility model embodiment provides a cooling component 1000, which includes a cooling base plate 1100 for supporting the bottom of a battery cell 2500 and a cooling side plate 1200 thermally connected to one side of the battery cell 2500. The cooling side plate 1200 includes a flow channel portion and a buffer portion. A cooling medium flows through at least one cooling flow channel 1111 in the flow channel portion to dissipate heat to the side of the battery cell 2500. Simultaneously, a buffer cavity 1112 in the buffer portion provides a buffer when the battery cell 2500 expands due to heat, preventing significant deformation of the battery cell 2500 structure. This cooling component 1000 not only dissipates heat from the battery cell 2500 but also buffers its expansion, ensuring the stability of the battery cell 2500 structure.
[0047] This utility model embodiment also provides a battery pack 2000, please refer to... Figure 6 and Figure 7 , Figure 6 This is a structural schematic diagram of the battery pack 2000 provided in an embodiment of the present invention. Figure 7 yes Figure 6 The exploded view shows the battery pack 2000, which includes multiple battery cells 2500 and multiple cooling elements 1000. Specifically, a cooling side plate 1200 is provided with multiple battery cells 2500 spaced apart along the length of the cooling base plate 1100, and the multiple cooling elements 1000 in the battery pack 2000 are spaced apart along the thickness of the battery cells 2500.
[0048] In some embodiments, please refer to Figure 8 , Figure 8 yes Figure 5A schematic diagram of the structure of multiple battery cells 2500 and multiple cooling components 1000 is shown. Each battery cell 2500 has an adjacent cooling component 1000 on one side, and the adjacent cooling component 1000 is thermally connected to the other side of the battery cell. Specifically, multiple battery cells 2500 placed on the same cooling base plate 1100 form a battery cell group. In the battery pack 2000, among the multiple battery cell groups along the thickness direction of the cooling side plate 1200, except for the battery cell groups located on both sides, one side of the remaining battery cell groups is thermally connected to the cooling side plate 1200 of the corresponding cooling component 1000, and the other side is thermally connected to another adjacent cooling side plate 1200, thereby achieving multi-faceted heat dissipation of the battery cells 2500 and improving the heat dissipation effect of the battery pack 2000.
[0049] In some embodiments, please refer to Figure 6 and Figure 7 The battery pack 2000 also includes a piping component 2100 for transmitting the cooling medium, and the piping component 2100 is connected to a plurality of corresponding cooling channels 1111 through each manifold 1300. In this embodiment, the cooling medium is transmitted through the piping component connected to each manifold 1300, which facilitates unified management and control of the cooling medium.
[0050] In some embodiments, please refer to Figure 8 Because the structure of the cooling component 1000 is such that one side of the cooling base plate 1100 is connected to a cooling side plate 1200, while the other side is not connected to a cooling side plate 1200, and because the cooling base plate 1100 is spaced apart in the thickness direction, this structure and placement of the cooling component 1000 will result in one of the battery cell groups located on both sides being able to dissipate heat on one side through the corresponding cooling side plate 1200, while the other side lacks a corresponding cooling side plate 1200 for heat dissipation. Therefore, in this embodiment, a separate cooling plate 2200 and a corresponding current collector 1300 are provided on the other side for heat dissipation on the other side of the battery cell group 2500.
[0051] In some embodiments, reference may be made to Figure 2 The buffer cavity 1112 is located on the side of the multiple cooling channels 1111 near the cooling base plate 1100.
[0052] Specifically, the battery pack 2000 also includes a fixing member 2300 located at the bottom of the plurality of cooling components 1000 for fixing the plurality of cooling components 1000. The fixing member 2300 extends beyond the two ends of the cooling base plate 1100 in the length direction, so that the buffer cavity 1112 is provided on the side of the plurality of cooling channels 1111 near the cooling base plate 1100, so that the current collector has enough space for snapping and fixing to the two ends of the channel portion.
[0053] In some embodiments, please refer to Figure 9 and Figure 10 , Figure 9 yes Figure 8 A structural diagram of two adjacent 2500 battery cells. Figure 10 yes Figure 9 A schematic diagram of section C. The battery pack 2000 also includes a heat insulation assembly, which includes multiple heat insulation elements 2400. Each heat insulation element 2400 is located between two adjacent cells 2500 along the length of the cooling side plate 1200. The thickness of the heat insulation element 2400 is 0.1 mm to 2 mm, and the thermal conductivity of the heat insulation element 2400 is 0.05 W / (m·K) to 1 W / (m·K).
[0054] Specifically, since the cells 2500 in the cell 2500 group generate heat during charging and discharging, if there is no heat insulation component 2400 between adjacent cells 2500 in the cell 2500 group, heat can easily accumulate in the cell 2500 group, thereby increasing the risk of overheating. In this embodiment, a corresponding heat insulation component 2400 is provided between two adjacent cells 2500 in the length direction of the cooling side plate 1200, which can effectively isolate heat transfer between adjacent cells 2500, reduce heat accumulation, and help maintain the temperature stability of the battery pack. The heat insulation component 2400 can also act as an insulating material to prevent direct contact between cells 2500, reducing the risk of short circuits. In addition, the heat insulation component 2400 usually has a certain degree of flexibility and adhesion, which can fix the position of the cells 2500 to a certain extent and prevent the cells 2500 from moving or misaligning under the action of external forces such as vibration or collision.
[0055] The thickness and thermal conductivity of the heat insulation component 2400 are related to the specific material. For example, when the heat insulation component 2400 is made of aerogel, its thermal conductivity is 0.05 W / (m·K) and its thickness is 0.1 mm; when the heat insulation component 2400 is made of silicone foam, its thermal conductivity is 0.06 W / (m·K) and its thickness is 0.12 mm; and when the heat insulation component 2400 is made of mica, its thermal conductivity is 0.35 W / (m·K) and its thickness is 0.7 mm. It is easy to understand that the thickness and / or thermal conductivity of the above materials may vary under different conditions. The above examples are only for better explanation of the embodiments of this utility model.
[0056] In some embodiments, the heat insulation component 2400 can be a heat-insulating silicone rubber with excellent heat insulation properties. Because heat-insulating silicone rubber has good heat insulation properties, it can effectively block heat conduction and reduce the speed of heat propagation between adjacent battery cells 2500, thereby playing a heat insulation role. At the same time, heat-insulating silicone rubber also has higher high-temperature resistance than ordinary rubber, enabling it to work stably for a long time in high-temperature environments without easily deforming, aging, or failing. Furthermore, heat-insulating silicone rubber also has a certain degree of softness and elasticity, as well as good electrical insulation properties, allowing it to adapt to materials of different shapes and surfaces, improving its coverage and sealing, effectively isolating current, and enhancing the safety of the battery pack 2000.
[0057] The battery pack 2000 provided in this embodiment of the present invention can achieve multi-faceted heat dissipation of multiple battery cells 2500 through multiple cooling components 1000, and at the same time, the buffer cavity 1112 on the cooling side plate 1200 provides buffer for the expansion of the battery cells 2500 to ensure the stability of the battery cell 2500 structure.
[0058] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A cooling element for cooling a battery cell, characterized in that: include: A cooling base plate, used to support the bottom of the battery cell; and A cooling side plate, connected to one side of the cooling bottom plate in a bent manner, and used to abut and thermally connect to one side of the battery core; Wherein, the cooling side plate includes a flow channel portion and a buffer portion; the flow channel portion is provided with one or more cooling flow channels, each of which is used to circulate cooling medium; the buffer portion is provided with a buffer cavity, and the buffer cavity extends along the length direction of the cooling side plate.
2. The cooling element according to claim 1, characterized in that The buffer cavity is located at one side of the plurality of cooling channels, and the distance between two adjacent cooling channels is smaller than the distance between the buffer cavity and the cooling channel adjacent to the buffer cavity.
3. The cooling element according to claim 2, characterized in that: The buffer cavity is located on one side of the plurality of cooling channels close to the cooling bottom plate.
4. The cooling element according to claim 1, characterized in that The size of the buffer cavity is the same as the size of each of the cooling channels.
5. The cooling element according to any one of claims 1 to 4, characterized in that: The thickness of the cooling side plate is 3 mm to 8 mm, the width of the cooling channel is 1.5 mm to 7 mm, and the width of the buffer cavity is 1.5 mm to 7 mm.
6. The cooling element according to claim 5, characterized in that The thickness of the cooling bottom plate is less than or equal to the thickness of the cooling side plate, and the thickness of the cooling bottom plate is 2 mm to 8 mm.
7. The cooling element according to any one of claims 1 to 4, characterized in that: It also includes two collecting pieces, the two ends of the flow channel part exceed the two ends of the buffer part, and the two collecting pieces are installed at the two ends of the flow channel part so that the collecting cavity of each collecting piece is connected to multiple cooling channels.
8. A battery pack, characterized in that: The invention comprises a plurality of battery cells as claimed in any one of claims 1 to 7 and a plurality of cooling elements as claimed in any one of claims 1 to 7.
9. The battery pack according to claim 8, characterized in that: One side of the cooling member corresponding to each of the battery cells is provided with an adjacent cooling member, and the adjacent cooling member is thermally connected to the other side of the battery cell.
10. The battery pack according to claim 8, characterized in that: It also includes a heat insulation component, which includes a plurality of heat insulation parts, each of which is located between two adjacent battery cells in the length direction of the cooling side plate, the thickness of the heat insulation part is 0.1mm to 2mm, and the thermal conductivity of the heat insulation part is 0.05W / (m·K) to 1W / (m·K).