Battery module and energy storage battery pack

Abstract

This application relates to the field of battery technology, and in particular to a battery module and energy storage battery pack, including a cell assembly and a heat dissipation component. The cell assembly includes multiple cells stacked sequentially along a first preset direction. The heat dissipation component is interspersed between the cell assemblies and forms heat dissipation channels extending through both sides along a direction perpendicular to the first preset direction. The heat dissipation channels are used for gas flow to dissipate heat from adjacent cells. It is evident that when cold air flows within the heat dissipation channels, it can remove the heat generated by the cells, greatly improving the heat dissipation effect, increasing heat dissipation efficiency, significantly extending cell lifespan, and improving system safety performance. Furthermore, the heat dissipation component is a hollow beam structure, providing bending stiffness and effectively suppressing expansion deformation during cell charge-discharge cycles. Moreover, designing the heat dissipation component as a structure of multiple connected I-shaped structures increases the heat dissipation area and resists cell expansion.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery module and energy storage battery pack. Background Technology

[0002] Battery packs are integrated energy storage devices in electric vehicles or electronic devices. They consist of multiple battery cells connected in series and parallel, and integrate key components such as a battery management system (BMS) and a thermal management system. They have received increasing attention and research. Currently, to avoid thermal runaway caused by overheating of the battery cells, fan components (such as fans) are often installed in the battery pack to facilitate air convection and dissipate the heat generated by the cells. However, relying solely on cooling fans to dissipate heat from the cells in battery modules results in low heat dissipation efficiency and poor heat dissipation effect. Utility Model Content

[0003] The purpose of this application is to provide a battery module and energy storage battery pack, which to a certain extent solves the technical problem in the prior art that the battery module relies solely on a cooling fan to dissipate heat from the battery cell, resulting in low heat dissipation efficiency and poor heat dissipation effect.

[0004] This application provides a battery module, including a cell assembly and a heat dissipation component; wherein, the cell assembly includes a plurality of cells stacked sequentially along a first preset direction; the heat dissipation component is inserted between the cell assemblies, and the heat dissipation component forms a heat dissipation channel extending through both sides along a direction perpendicular to the first preset direction, and the heat dissipation channel is used for gas flow to dissipate heat from adjacent cells.

[0005] In the above technical solution, the heat dissipation component further includes at least one heat dissipation part assembly. Each heat dissipation part assembly includes a spacer portion and a first heat dissipation plate and a second heat dissipation plate respectively connected to the spacer portion. Along the first preset direction, the first heat dissipation plate and the second heat dissipation plate are respectively disposed at opposite ends of the spacer portion to form an I-shaped structure. The heat dissipation channel is formed between the first heat dissipation plate, the second heat dissipation plate and the spacer portion. The first heat dissipation plate abuts against the large surface side of the adjacent battery cell. The second heat dissipation plate abuts against the large surface side of the adjacent battery cell.

[0006] In any of the above technical solutions, when there are multiple heat dissipation components, the multiple heat dissipation components are arranged sequentially at intervals along the height direction of the battery cell; the battery module also includes a connecting portion, and the connecting portion extends along the height direction of the battery cell, and the intervals of all the heat dissipation components are connected together through the connecting portion.

[0007] In any of the above technical solutions, the heat dissipation component further includes a first auxiliary connection portion and a second auxiliary connection portion; wherein, along the height direction of the battery cell, the first auxiliary connection portion is disposed on the top of the first first heat dissipation plate and the first second heat dissipation plate, and is connected to both respectively; the first auxiliary connection portion is disposed on the bottom of the last first heat dissipation plate and the last second heat dissipation plate, and is connected to both respectively; the first auxiliary connection portion is connected to the top of the connection portion; and the second auxiliary connection portion is connected to the bottom of the connection portion.

[0008] In any of the above technical solutions, the connecting part is further described as a flat plate structure parallel to the large surface side of the battery cell.

[0009] In any of the above technical solutions, the first heat sink, the second heat sink, the spacer, and the connecting part are an integral structure.

[0010] In any of the above technical solutions, the first heat sink and the second heat sink are both arranged parallel to the large surface side of the battery cell.

[0011] In any of the above technical solutions, the spacer portion is further disposed perpendicular to the large surface side of the battery cell.

[0012] In any of the above technical solutions, the battery module further includes cable ties, and all the battery cells are tied together by the cable ties. The cable ties are arranged around and abut against the side of the battery cell assembly along its height direction, and heat dissipation through holes are formed on opposite sides of the cable ties, which correspond one-to-one with the opposite sides of the heat dissipation channel.

[0013] In any of the above technical solutions, the number of heat dissipation through holes corresponding to the same opening end of the heat dissipation channel is multiple.

[0014] In any of the above technical solutions, the heat dissipation through hole is further defined as a round hole, a square hole, a polygonal hole, or a honeycomb hole.

[0015] In any of the above technical solutions, the cable tie is further covered with an insulating layer.

[0016] In any of the above technical solutions, the number of heat dissipation components is multiple, and they are arranged sequentially at intervals along the first preset direction.

[0017] In any of the above technical solutions, the heat dissipation component extends along the length and height directions of the battery cell.

[0018] This application also provides an energy storage battery pack, which includes the battery module described in any of the above technical solutions, and thus has all the beneficial technical effects of the battery module, which will not be repeated here.

[0019] In the above technical solution, the energy storage battery pack further includes an upper shell, a lower shell, two limiting components, and a battery management module; wherein, the two limiting components are fixed to the bottom wall of the lower shell and are spaced apart along the first preset direction; The battery cell assembly is disposed between the two limiting members, and the two limiting members abut against the opposite ends of the battery cell assembly; the battery management module is disposed inside the lower housing and is located along the first preset direction on the side of one of the limiting members away from the battery module; the upper housing covers the top opening of the lower housing.

[0020] Compared with the prior art, the beneficial effects of this application are as follows: In the battery module provided in this application, heat sinks are interspersed between the battery cell components, and heat dissipation channels are set in the heat sinks. Cool air can be introduced into the heat dissipation channels. When the cool air circulates in the heat dissipation channels, it can carry away the heat generated by the battery cells, which greatly improves the heat dissipation effect of the battery cells and improves the heat dissipation efficiency. This enhances the overall heat dissipation capacity of the energy storage system, significantly improves the lifespan of the battery cells, and improves the safety performance of the system. Moreover, the heat dissipation component is a hollow beam structure, which provides bending stiffness and effectively suppresses the expansion deformation of the battery cells during charge and discharge cycles. Furthermore, the heat dissipation component is designed as a structure in which multiple I-shaped structures are connected together, which has the functions of increasing the heat dissipation area and providing structural strength to resist the expansion of the battery cells.

[0021] Furthermore, heat dissipation holes are provided at the positions corresponding to the heat dissipation channels of the cable ties, reducing obstruction of airflow and helping to improve heat dissipation efficiency. This promotes airflow into the heat dissipation channels, enhancing heat dissipation efficiency. Especially when there are multiple battery modules arranged side by side, convection can be formed between adjacent battery modules. In addition, heat dissipation holes are provided at the positions where the cable ties block the heat dissipation channels, which can guide airflow and enhance convection. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the battery module provided in an embodiment of this application; Figure 2 This is another structural schematic diagram of the battery module provided in the embodiments of this application; Figure 3 for Figure 2 A magnified structural diagram at point A; Figure 4 This is a schematic diagram of the structure of the heat dissipation component provided in the embodiments of this application; Figure 5 This is another structural schematic diagram of the heat dissipation component provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the energy storage battery pack provided in the embodiments of this application; Figure 7 This is a partial structural schematic diagram of the energy storage battery pack provided in the embodiments of this application; Figure 8 This is another structural schematic diagram of the energy storage battery pack provided in an embodiment of this application.

[0024] Figure label: 1-Battery cell assembly, 11-Battery cell, 2-Heat dissipation component, 21-Heat dissipation assembly, 211-Spacing part, 212-First heat dissipation plate, 213-Second heat dissipation plate, 22-Connecting part, 23-First auxiliary connecting part, 24-Second auxiliary connecting part, 25-Heat dissipation channel, 251-First heat dissipation channel, 252-Second heat dissipation channel, 3-Cable tie, 31-Heat dissipation through hole, 4-End plate, 10-Battery module, 20-Upper housing, 30-Lower housing, 40-Limiting component, 50-Battery management module, a-First preset direction, b-Second preset direction. Detailed Implementation

[0025] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0026] The components of the embodiments of this application described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0027] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] The following reference Figures 1 to 8 This application describes a battery module and energy storage battery pack according to some embodiments.

[0031] Example 1 See Figures 1 to 5 As shown, an embodiment of this application provides a battery module 10, including a cell assembly 1 and a heat dissipation component 2; wherein, the cell assembly 1 includes a plurality of cells 11 stacked sequentially along a first preset direction a; the heat dissipation component 2 is inserted between the cell assemblies 1, and the heat dissipation component 2 forms a heat dissipation channel 25 extending through both sides along a direction perpendicular to the first preset direction a, that is, a second preset direction b. In other words, the heat dissipation channel 25 extends along a direction perpendicular to the first preset direction a, and the heat dissipation channel 25 is used for gas flow to dissipate heat from adjacent cells 11.

[0032] As can be seen from the structure described above, in the battery module 10 provided in this application, heat sinks are inserted between the cell components 1, and heat dissipation channels 25 are provided in the heat sinks, so that cold air can be introduced into the heat dissipation channels 25. When the cold air flows in the heat dissipation channels 25, it can carry away the heat generated by the cell 11, which greatly improves the heat dissipation effect of the cell 11, improves the heat dissipation efficiency, improves the overall heat dissipation capacity of the energy storage system, significantly improves the life of the cell 11, and improves the safety performance of the system. Moreover, the heat dissipation component 2 is a hollow beam structure, which provides bending stiffness and effectively suppresses the expansion deformation of the cell 11 during the charge and discharge cycle.

[0033] Furthermore, preferably, the first preset direction a is the thickness direction of the battery cell 11, and the second preset direction b is the length direction of the battery cell 11. That is to say, the heat dissipation channel 25 extends along the length direction of the battery cell 11. It can also be seen that the heat dissipation channel 25 is set along the horizontal direction. Of course, it is not limited to this. The second preset direction b can also be a direction that forms an angle with the length direction of the battery cell 11. That is to say, in this case, the heat dissipation channel 25 does not extend along the horizontal direction, but is set at an angle relative to the horizontal direction. However, it is necessary to ensure that the heat dissipation channel 25 is not set along the vertical direction, that is, the height direction of the battery cell 11. The specific choice depends on the actual needs.

[0034] In this embodiment, preferably, as follows: Figures 3 to 5 As shown, the heat dissipation component 2 includes at least one heat dissipation assembly 21. Each heat dissipation assembly 21 includes a spacer 211 and a first heat dissipation plate 212 and a second heat dissipation plate 213 respectively connected to the spacer 211. Along the first preset direction a, the first heat dissipation plate 212 and the second heat dissipation plate 213 are respectively disposed at opposite ends of the spacer 211 to form an I-shaped structure. A heat dissipation channel 25 is formed between the first heat dissipation plate 212, the second heat dissipation plate 213 and the spacer 211. The first heat dissipation plate 212 abuts against the large surface side of the adjacent battery cell 11. The second heat dissipation plate 213 abuts against the large surface side of the adjacent battery cell 11. It should be noted that the battery cell 11 is cuboid in shape and has a long side, a wide side and a high side. The large surface side of the battery cell 11 refers to the surface with the largest area formed by the long side and the high side. As can be seen from the structure described above, the first heat sink 212 abuts against the large surface side of the adjacent battery cell 11, and the second heat sink 213 abuts against the large surface side of the adjacent battery cell 11, which increases the contact area with the battery cell 11, that is, increases the heat dissipation area, thereby improving the heat dissipation effect on the battery cell 11.

[0035] Further, preferably, such as Figures 3 to 5 As shown, both the first heat sink 212 and the second heat sink 213 are arranged parallel to the large surface side of the battery cell 11, increasing the contact area between the first heat sink 212 and the second heat sink 213 and the battery cell 11, which helps to improve the heat dissipation effect and makes the assembly structure more stable and robust. Of course, it is not limited to this; the first heat sink 212 and the large surface side of the battery cell 11 can also form an acute angle or an obtuse angle, etc., depending on the actual needs. Further, preferably, such as Figure 4 and Figure 5As shown, the spacer portion 211 is arranged perpendicular to the large surface side of the battery cell 11, with a regular structure that is easy to form and ensures that the length of the spacer portion 211 is minimized, which helps to save materials. Of course, the spacer portion 211 can also be arranged at an acute angle or an obtuse angle to the large surface side of the battery cell 11.

[0036] In this embodiment, preferably, as follows: Figure 4 and Figure 5 As shown, when there are multiple heat dissipation components 21, and these multiple heat dissipation components 21 are arranged sequentially at intervals along the height direction of the cell 11; the battery module 10 also includes a connecting portion 22, which extends along the height direction of the cell 11, and the interval portions 211 of all the heat dissipation components 21 are connected together through the connecting portion 22. It can be seen that the connecting portion 22, together with the first heat dissipation plate 212, the second heat dissipation plate 213 and the interval portion 211 in each heat dissipation component 21, together form four heat dissipation channels 25, that is, four first heat dissipation channels 251. The first heat dissipation channels 251 are spaced apart from the cell 11 by the aforementioned first heat dissipation plate 212 or second heat dissipation plate 213. In addition, two adjacent heat dissipation components 21 form two heat dissipation channels 25, that is, second heat dissipation channels 252, along the vertical direction. The second heat dissipation channels 252 are in direct contact with the cell 11. As can be seen from the structure described above, the first heat sink 212 of the same heat sink assembly 21 are all located on the same side of the connecting part 22, and all the first heat sink 212 are arranged in parallel from top to bottom. One side of the battery cell 11 can contact multiple first heat sinks 212 at the same time. The second heat sink 213 of the same heat sink assembly 21 are all located on the other side of the connecting part 22, and all the second heat sinks 213 are arranged in parallel from top to bottom. The other side of the battery cell 11 can contact multiple second heat sinks 213 at the same time. Moreover, in terms of the overall heat sink component 2, the heat sink channel 25, i.e., the perforation array, is arranged from top to bottom to form a directional air channel, which can reduce wind resistance and guide airflow through the heat sink component 2. Ultimately, the two opposite large surfaces of the battery cell 11 can be effectively cooled from top to bottom, which helps to improve the heat dissipation effect and ensure the uniformity of heat dissipation.

[0037] In addition, multiple heat dissipation components 21 are spaced apart, allowing the airflow in the area between them to directly contact the battery cell 11 and carry away more heat. Moreover, the multiple evenly arranged heat dissipation components 21 are in direct contact with the battery cell 11, playing a role in heat dissipation and temperature equalization.

[0038] In this embodiment, preferably, as follows: Figure 4 and Figure 5As shown, the heat dissipation component 2 includes a first auxiliary connection portion 23 and a second auxiliary connection portion 24; wherein, along the height direction of the battery cell 11, the first auxiliary connection portion 23 is disposed on the top of the first first heat dissipation plate 212 and the first second heat dissipation plate 213, and is connected to both respectively; the first auxiliary connection portion 23 is disposed on the bottom of the last first heat dissipation plate 212 and the last second heat dissipation plate 213, and is connected to both respectively; the first auxiliary connection portion 23 is connected to the top of the connection portion 22; and the second auxiliary connection portion 24 is connected to the bottom of the connection portion 22.

[0039] As can be seen from the structure described above, the first auxiliary connecting part 23 and the second auxiliary connecting part 24 are used to connect the connecting part 22 to the first heat sink 212 and the second heat sink 213 at the top and bottom, respectively, thereby reinforcing the connection.

[0040] It should be noted that the first auxiliary connecting part 23 and the second auxiliary connecting part 24 may not be provided; the specific choice depends on the actual needs.

[0041] In addition, it should be noted that the number of heat dissipation components 21 is not limited to multiple, but may be only one. In this case, the connection part 22 is not required. The first auxiliary connection part 23 and the second auxiliary connection part 24 may or may not be provided, depending on the actual needs.

[0042] In this embodiment, preferably, as follows: Figure 4 and Figure 5 As shown, the connecting part 22 is a flat plate structure parallel to the large surface side of the battery cell 11, with sufficient area to connect all the heat dissipation components 21 together, and this structure occupies little space. Of course, it is not limited to this. The connecting part 22 can also be a flat plate structure forming an obtuse angle or an acute angle with the large surface side of the battery cell 11. In addition, it should be noted that the connecting part 22 is not limited to a flat plate structure, but can also be other types of structures.

[0043] In this embodiment, preferably, as follows: Figure 4 and Figure 5 As shown, the first heat sink 212, the second heat sink 213, the spacer 211, and the connecting part 22 are an integral structure. As can be seen from the structure described above, the heat dissipation component 2 adopts a one-piece molded structure, which has higher strength and can effectively resist the expansion and deformation of the battery cell 11. Of course, it is not limited to this; it can also be a split structure, which can be connected together later by welding or other methods. In this embodiment, preferably, as follows: Figure 1 and Figure 3As shown, the battery module 10 also includes cable ties 3, and all the battery cells 11 are bound together by the cable ties 3. The cable ties 3 are arranged around and abut against the side of the battery cell assembly 1 along its height direction, and heat dissipation through holes 31 are formed on opposite sides of the cable ties 3, which correspond one-to-one with the opposite sides of the heat dissipation channel 25. It should be noted that the battery module 10 also includes two end plates 4, and the two end plates 4 are respectively arranged at opposite ends of the battery cell assembly 1 along the first preset direction a, and are bound together with the battery cell assembly 1 by the aforementioned cable ties 3. Of course, the end plates 4 are prior art and will not be described in detail here. As can be seen from the structure described above, a heat dissipation hole 31 is provided at the position of the cable tie 3 corresponding to the heat dissipation channel 25, which reduces the obstruction of airflow and helps to improve heat dissipation efficiency. It promotes airflow into the heat dissipation channel 25 and improves heat dissipation efficiency. Especially when there are multiple battery modules 10 and they are arranged side by side, convection can be formed between two adjacent battery modules 10. Furthermore, the heat dissipation hole 31 is provided at the position where the cable tie 3 blocks the heat dissipation channel 25, which can guide airflow and enhance convection.

[0044] Furthermore, preferably, the exterior of the heat dissipation sleeve is covered with an insulating layer, which can both dissipate heat and provide insulation.

[0045] In this embodiment, preferably, as follows: Figure 3 As shown, there are multiple heat dissipation holes 31 corresponding to the same opening end of the heat dissipation channel 25, which helps to improve the heat dissipation effect. Of course, it is not limited to this. The number of heat dissipation holes 31 corresponding to the same opening end of the heat dissipation channel 25 can also be one. The size of the hole can be designed as needed.

[0046] Furthermore, preferably, the heat dissipation through hole 31 can be a round hole, a square hole, or a polygonal hole. Of course, it is not limited to these and can be selected according to actual needs. In this embodiment, preferably, as follows: Figure 1 As shown, there are multiple heat dissipation components 2, which are arranged sequentially at intervals along the first preset direction a. As can be seen from the structure described above, multiple heat dissipation components 2 are inserted between the battery cell assembly 1 to further improve the heat dissipation effect. Of course, it is not limited to this. The number of heat dissipation components 2 can also be one, etc., depending on the actual needs. It should be noted that the battery module 10 also includes components such as the tab bracket and busbar, which are existing structures and will not be described in detail here.

[0047] Example 2 See Figures 6 to 8As shown, Embodiment 2 of this application also provides an energy storage battery pack, including the battery module 10 described in Embodiment 1 above. Therefore, it has all the beneficial technical effects of the battery module 10. The same technical features and beneficial effects will not be repeated here.

[0048] In this embodiment, preferably, as follows: Figures 6 to 8 As shown, the energy storage battery pack also includes an upper housing 20, a lower housing 30, two limiting members 40, and a battery management module 50; wherein, the two limiting members 40 are fixed to the bottom wall of the lower housing 30 and are spaced apart along the first preset direction a. The cell assembly 1 is disposed between two limiting members 40, and the two limiting members 40 abut against the opposite ends of the cell assembly 1 respectively; the battery management module 50 is disposed inside the lower housing 30, and is located on the side away from the battery module 10 of one of the limiting members 40 along the first preset direction a; the upper housing 20 covers the top opening of the lower housing 30. As can be seen from the structure described above, the battery module 10 is installed inside the lower housing 30 and sealed by the upper housing 20, which serves to protect the battery module 10; the two limiting members 40 serve to limit the battery module 10, preventing it from moving and colliding with other structures and being damaged; the battery management module 50 is located on one side of the battery module 10 along its length, making full use of the space in the length direction, and facilitating connection with the electrical components at the end of the lower housing 30. Furthermore, preferably, the number of battery modules 10 is one, but of course, it is not limited to this and the number can also be multiple.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery module, characterized in that, The device includes a battery cell assembly and a heat dissipation component; wherein the battery cell assembly includes a plurality of battery cells stacked sequentially along a first preset direction; the heat dissipation component is inserted between the battery cell assemblies, and the heat dissipation component forms a heat dissipation channel that extends through both sides along a direction perpendicular to the first preset direction, and the heat dissipation channel is used for gas flow to dissipate heat from adjacent battery cells.

2. The battery module of claim 1, wherein, The heat dissipation component includes at least one heat dissipation part assembly. Each heat dissipation part assembly includes a spacer portion and a first heat dissipation plate and a second heat dissipation plate respectively connected to the spacer portion. Along the first preset direction, the first heat dissipation plate and the second heat dissipation plate are respectively disposed at opposite ends of the spacer portion to form an I-shaped structure. The heat dissipation channel is formed between the first heat dissipation plate, the second heat dissipation plate and the spacer portion. The first heat dissipation plate abuts against the large surface side of the adjacent battery cell. The second heat dissipation plate abuts against the large surface side of the adjacent battery cell.

3. The battery module of claim 2, wherein, When there are multiple heat dissipation components, and the multiple heat dissipation components are arranged sequentially at intervals along the height direction of the battery cell; the battery module also includes a connecting portion, and the connecting portion extends along the height direction of the battery cell, and all the spaced portions of the heat dissipation components are connected together through the connecting portion.

4. The battery module of claim 3, wherein, The heat dissipation component includes a first auxiliary connection portion and a second auxiliary connection portion; wherein, along the height direction of the battery cell, the first auxiliary connection portion is disposed at the top of the first first heat dissipation plate and the first second heat dissipation plate, and is respectively connected to both; the first auxiliary connection portion is disposed at the bottom of the last first heat dissipation plate and the last second heat dissipation plate, and is respectively connected to both; the first auxiliary connection portion is connected to the top of the connection portion; the second auxiliary connection portion is connected to the bottom of the connection portion; and / or The connecting portion is a flat plate structure parallel to the large surface side of the battery cell; and / or The first heat sink, the second heat sink, the spacer, and the connecting part are an integral structure.

5. The battery module of claim 2, wherein, Both the first heat sink and the second heat sink are arranged parallel to the large surface side of the battery cell; and / or The spacer portion is arranged perpendicular to the large surface side of the battery cell.

6. The battery module of claim 1, wherein, The battery module also includes cable ties, and all the battery cells are tied together by the cable ties. The cable ties are arranged around and abut against the side of the battery cell assembly along its height direction, and heat dissipation through holes are formed on opposite sides of the cable ties, which correspond one-to-one with the opposite sides of the heat dissipation channel.

7. The battery module of claim 6, wherein, The number of heat dissipation through holes corresponding to the same opening end of the heat dissipation channel is multiple; and / or The heat dissipation holes are round, square, or polygonal; and / or The cable tie is covered with an insulating layer.

8. The battery module of any one of claims 1 to 7, wherein, The number of heat dissipation components is multiple, and they are arranged sequentially at intervals along the first preset direction; and / or The heat dissipation component extends along the length and height of the battery cell.

9. An energy storage battery pack, characterized by, Includes the battery module as described in any one of claims 1 to 8.

10. The energy storage battery pack of claim 9, wherein, The energy storage battery pack also includes an upper shell, a lower shell, two limiting components, and a battery management module; wherein, the two limiting components are fixed to the bottom wall of the lower shell and are spaced apart along the first preset direction; The battery cell assembly is disposed between the two limiting members, and the two limiting members abut against the opposite ends of the battery cell assembly; the battery management module is disposed inside the lower housing and is located along the first preset direction on the side of one of the limiting members away from the battery module; the upper housing covers the top opening of the lower housing.

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