Battery pack and energy storage cabinet

Abstract

The utility model provides a battery pack which comprises a cover plate, a box body and a battery module contained in the box body, the cover plate covers the box body, the battery module comprises a plurality of battery cells, every two adjacent battery cells are electrically connected through an aluminum row, a boss is arranged on the inner surface, facing the box body, of the cover plate, and a heat conduction pad is arranged between the boss and the aluminum row. The bosses and the heat conduction pads are arranged between the inner surface of the top cover of the battery pack and the aluminum row on the top surface of the battery module, so that the natural heat dissipation of the battery pack is enhanced.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and more particularly to a battery pack and energy storage cabinet. Background Art

[0002] To address global climate change and other problems caused by the extensive use of fossil fuels, countries are actively seeking clean energy alternatives, leading to continuous growth in wind and solar power installations. Due to the instability and uneven distribution of clean energy generation, electrochemical energy storage, with its advantages of high environmental adaptability, fast response speed, high power output, and high energy density, is expected to become the mainstream approach for future energy storage. Simultaneously, higher requirements are being placed on the safety of energy storage products. Thermal safety is one of the most crucial safety performance characteristics of energy storage.

[0003] In practice, battery packs typically employ liquid cooling or air cooling. These two methods not only increase cooling costs but also increase the number of battery pack components and the overall size of the pack, thereby reducing its energy density. Therefore, designing a battery pack structure with natural heat dissipation has become an urgent problem to solve. Utility Model Content

[0004] This application provides a battery pack that enhances natural heat dissipation by providing a boss and a thermal pad between the inner surface of the top cover of the battery pack and the aluminum strip on the top surface of the battery module.

[0005] Firstly, this application provides a battery pack, comprising a cover plate, a housing, and a battery module housed within the housing. The cover plate covers the housing, and the battery module includes multiple battery cells. Any two adjacent cells are electrically connected via an aluminum busbar. The two ends of the aluminum busbar are connected to the positive terminal of one of the two cells and the negative terminal of the other. A boss is provided on the inner surface of the cover plate facing the housing, and a thermally conductive pad is placed between the boss and the aluminum busbar. During the charging and discharging process of the battery cells, a large amount of heat is generated. If this heat accumulates, it may cause the battery pack to burn or explode. The aluminum busbar, as a component responsible for current flow in the battery module, is one of the components that generates a significant amount of heat. By providing a boss on the inner surface of the cover plate and placing a thermally conductive pad between the aluminum busbar and the battery cover plate, the heat generated by the aluminum busbar can be transferred to the cover plate through the thermally conductive pad and the boss, and then dissipated outside the housing, achieving natural heat dissipation of the battery pack.

[0006] In one possible implementation, the thickness of the cover plate is less than the height of the battery module, and the height of the battery module is less than the height of the casing. This allows for a more compact arrangement of components within the battery pack in the vertical direction, thereby increasing the energy density of the battery pack.

[0007] In one possible implementation, the aluminum busbar has two grooves, each with a depth of less than or equal to 2mm. The projections of these two grooves along the height of the battery pack respectively cover the projections of the positive terminal of one battery cell and the negative terminal of the other battery cell along the height of the battery pack. The two grooves on the aluminum busbar are positioned directly opposite the corresponding welded terminals, ensuring that the thickness of the welded portion between the aluminum busbar and the terminal is moderate. This ensures the effectiveness of the laser welding between the aluminum busbar and the terminal and prevents current breakdown due to the aluminum busbar being too thin.

[0008] In one possible implementation, the openings of the two grooves face the positive terminal of one battery cell and the negative terminal of the other, respectively. One groove accommodates the positive terminal of one battery cell, and the other groove accommodates the negative terminal of the other battery cell. The gap between the inner wall of one groove and the positive terminal of one battery cell is less than or equal to 0.5 mm, and the gap between the inner wall of the other groove and the negative terminal of the other battery cell is less than or equal to 0.5 mm. By aligning the grooves with the battery cell terminals, the grooves act as a limiting element for the terminals. Furthermore, the gap between the grooves and the side walls of the terminals allows for some movement of the battery cells during assembly, which occurs when the silicone foam between the cells is compressed. A gap is also provided between the plastic support and the aluminum busbar to accommodate this movement.

[0009] In one possible implementation, the battery pack includes a separator, an end plate, and a battery management unit (BMU). The separator divides the housing into two compartments, one for housing the battery modules and the other for housing the BMU. An opening is provided on one side wall of the housing, perpendicular to the cover plate, and the BMU is located between the separator and the opening. The end plate is fastened to the opening and has a protrusion facing the BMU. A thermal pad is placed between the protrusion and the BMU's individual circuit board. The BMU's circuit board includes heat-generating components such as power devices, which can be transferred to the outside of the end plate via the thermal pad and the second protrusion, enhancing the heat dissipation of the BMU.

[0010] In one possible implementation, the surface of the cover plate facing away from the housing is provided with heat dissipation dents, which are positioned opposite to the protrusions on the cover plate. The heat dissipation dents can increase the heat dissipation area of ​​the cover plate and improve the natural heat dissipation effect of the cover plate on the battery module.

[0011] In one possible implementation, the end plate has heat dissipation dents on its surface facing away from the battery management unit, and these dents are positioned opposite to the protrusions on the end plate. The heat dissipation dents increase the heat dissipation area of ​​the end plate, improving its natural heat dissipation effect on the individual circuit boards within the battery management unit.

[0012] In one possible implementation, thermally conductive adhesive is provided on the bottom wall of the housing, and the thermally conductive adhesive is located between the bottom wall of the housing and the bottom surface of the battery module, so that the battery module can dissipate heat through the bottom wall of the housing.

[0013] In one possible implementation, the inner surface of the cover is coated with insulating varnish, which improves the insulation performance between the cover and the battery module while ensuring the heat dissipation effect of the battery pack, increases the creepage distance between the cover and the battery module, and prevents arcing and sparking caused by insulation failure of the battery module.

[0014] In one possible implementation, the inner surface of the cover is covered with a ceramic composite strip, which improves the insulation performance between the cover and the battery module while ensuring the heat dissipation effect of the battery pack, increases the creepage distance between the cover and the battery module, and prevents arcing and sparking.

[0015] Secondly, this application provides an energy storage cabinet, which includes a cabinet body and multiple aforementioned battery packs located inside the cabinet body. The multiple battery packs are stacked to increase the capacity of the energy storage cabinet.

[0016] Thirdly, this application provides a data center, which includes a load and the aforementioned energy storage cabinet, the energy storage cabinet being used to supply power to the load. Attached Figure Description

[0017] Figure 1 This is an exploded view of the battery pack structure provided in the embodiments of this application;

[0018] Figure 2 This is a schematic diagram of the inner surface of the cover plate of the battery pack provided in the embodiments of this application;

[0019] Figure 3 This is a cross-sectional view along the Z direction of the structure of the battery pack housing provided in the embodiments of this application;

[0020] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is an exploded view of the battery module structure of the battery pack provided in the embodiments of this application;

[0022] Figure 6 This is a schematic diagram of the structure of the aluminum busbar of the battery pack installed on the plastic bracket according to an embodiment of this application;

[0023] Figure 7 This is a schematic diagram of the structure of one side of the aluminum busbar of the battery pack provided in the embodiment of this application;

[0024] Figure 8 This is a schematic diagram of the structure of the aluminum busbar of the battery pack provided in the embodiments of this application;

[0025] Figure 9 This is a cross-sectional view of the aluminum busbar of the battery pack provided in the embodiment of this application along the Z direction;

[0026] Figure 10 This is an exploded view of another structure of the battery pack provided in the embodiments of this application;

[0027] Figure 11 This is a schematic diagram of the structure of the inner surface of the end plate of the battery pack provided in the embodiments of this application;

[0028] Figure 12 This is a schematic diagram of the outer surface of the end plate of the battery pack provided in the embodiments of this application.

[0029] Figure label:

[0030] 200-Battery pack; 201-Cover plate; 2011-First boss; 2012-Inner surface of cover plate; 2013-Outer surface of cover plate; 2014-First heat dissipation tooth; 202-First thermal pad; 203-Battery module; 2031-Cell; 2032-Aluminum busbar; 20321-Groove; 2033-Plastic bracket; 204-Box body; 2041-First opening; 2042-Second opening; 205-BMU; 206-Separator; 207-End plate; 2071-Second heat dissipation tooth; 2072-Inner surface of end plate; 2073-Outer surface of end plate; 2074-Second boss. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The terms expressing position and direction described in the embodiments of this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings of the embodiments of this application are for illustrating relative positional relationships only and do not represent actual scale.

[0032] In the embodiments of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0033] It should be noted that specific details are set forth in the following description to facilitate understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] For ease of understanding, the terminology used in the embodiments of this application will be explained first.

[0035] Multiple: refers to two or more.

[0036] The term "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Similarly, "fixation" should also be interpreted broadly. For example, "fixation" can be direct fixation or indirect fixation through an intermediate medium.

[0037] The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," "top," and "bottom," are only for reference to the directions in the accompanying drawings. These directional terms are used to better and more clearly explain and understand the embodiments of this application, and are not intended to explicitly or implicitly suggest that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, etc., and therefore should not be construed as limiting the embodiments of this application.

[0038] The embodiments of this application are described below with reference to the accompanying drawings.

[0039] Generally, to increase battery pack capacity, a battery pack contains multiple cells connected in series or parallel. On one hand, the cells generate a large amount of heat during charging and discharging due to electrochemical reactions, posing a risk of thermal runaway. On the other hand, side reactions triggered by the electrochemical reactions in the electrolyte within the cells can also easily lead to thermal runaway. Furthermore, ensuring that the cells operate within a suitable temperature range not only extends the battery's aging life but also reduces the probability of battery pack thermal runaway. Therefore, timely heat dissipation measures for the cells in the battery pack are particularly important. Currently, battery packs mainly use liquid cooling or air cooling for heat dissipation. However, for scenarios using small-capacity battery packs (such as energy storage devices powering data centers), installing liquid cooling plates or air cooling devices increases the number of components in the battery pack, leading to a larger battery pack size and increased maintenance costs. Therefore, designing a low-cost natural heat dissipation method for battery packs has become an urgent problem to solve.

[0040] This application provides a battery pack 200, the structure of which can be referred to. Figure 1The diagram shows an exploded view of the battery pack 200. The battery pack 200 includes a cover plate 201, a housing 204, and a battery module 203. The battery module 203 is located inside the housing 204. The cover plate 201 covers the top opening of the housing 204, sealing the housing 204. The housing 204 has a first opening 2041, and the cover plate 201 is fastened to the first opening 2041. The battery module 203 includes multiple battery cells 2031 arranged side-by-side. Any two adjacent battery cells 2031 are electrically connected via an aluminum busbar 2032. The two ends of the aluminum busbar 2032 are connected to the positive terminal of one of the two battery cells 2031 and the negative terminal of the other battery cell 2031, respectively. A first boss 2011 is provided on the inner surface 2012 of the cover plate 201 facing the housing 204, and a thermal pad is provided between the first boss 2011 and the aluminum strip 2032. The structure and position of the first boss 2011 are described in reference [reference needed]. Figures 2-4 As shown, Figure 2 This is a structural schematic diagram of the inner surface 2012 of the cover plate 201. Figure 3 This is a cross-sectional view of the structure of the housing 204 along the Z-direction, where the Z-direction is the height direction of the battery pack 200. Figure 4 for Figure 3 Enlarged schematic diagram at point A. The aluminum busbar 2032 is used to electrically connect the positive and negative terminals of two adjacent battery cells 2031, serving a current-carrying function. During the charging and discharging process of the battery pack 200, the aluminum busbar 2032, due to the current flowing through it, is one of the larger heat-generating components of the battery pack 200. Because the aluminum busbar 2032 is mounted in the plastic bracket 2033, the sidewall of the plastic bracket 2033 is higher than the upper surface of the aluminum busbar 2032. The gap between the cover plates 201 and the upper surface of the aluminum busbar 2032 is detrimental to heat dissipation. Therefore, in this embodiment, a first protrusion 2011 facing the aluminum busbar 2032 is provided on the inner surface 2012 of the cover plate 201, and a first thermally conductive pad 202 is provided between the first protrusion 2011 and the aluminum busbar 2032. The thermal conductivity of the first thermally conductive pad 202 can be between 2.8 and 3.5 W / mK, which can promptly transfer the heat generated by the aluminum busbar 2032 to the cover plate 201 through the first thermally conductive pad 202 and the first protrusion 2011, and then dissipate it outside the housing 204, realizing natural heat dissipation of the battery pack 200. It should be noted that the first protrusion 2011 and the cover plate 201 can be a single piece, which can be manufactured by a die-casting process. The first thermal pad 202 is an elastic thermal pad. After assembling the battery module 203 and attaching the first thermal pad 202 to the surface of the aluminum busbar 2032, the battery module 203 is installed into the housing 204. Then, the cover plate 201 is placed on the housing 204. Because the first thermal pad 202 is elastic, the cover plate 201 compresses the thermal pad, so that there is no gap between the first thermal pad 202 and the cover plate 201, which further enhances the heat dissipation capacity of the battery pack 200.

[0041] To further enhance the heat dissipation effect of the cover plate 201 on the battery cell 2031, a first heat dissipation tooth 2014 can be provided on the outer surface 2013 of the cover plate 201. The structure of the first heat dissipation tooth 2014 is as follows: Figure 4 The first heat dissipation tooth 2014 and the first protrusion 2011 of the cover plate 201 are arranged opposite to each other. The arrangement of the first heat dissipation tooth 2014 can increase the heat dissipation area and improve the heat dissipation effect.

[0042] It should be understood that, in the Z direction, the thickness of the cover plate 201 is less than the height of the battery module 203, and the height of the battery module 203 is less than the height of the housing 204. This allows the components inside the battery pack 200 to be arranged more compactly in the height direction, thereby improving the energy density of the battery pack 200.

[0043] In practice, the positive and negative terminals of the battery cell 2031 are usually located on the top surface of the battery cell 2031. A plastic bracket 2033 is provided on the top surface of the battery module 203. The structure of the plastic bracket 2033 is as follows: Figure 5 The exploded view of the battery module 203 shown is as follows: Figure 6 The diagram shows the structure of the aluminum busbar 2032 mounted on the plastic bracket 2033. The plastic bracket 2033 serves to limit the aluminum busbar 2032, which is then connected to the terminal of the battery cell 2031 via laser welding. On one hand, due to limitations in the welding process, the aluminum busbar 2032 cannot be too thick, otherwise it will be impossible to weld it to the terminal of the battery cell 2031. In this embodiment, the thickness h1 of the aluminum busbar 2032 can be designed to be less than or equal to 3.5 mm. On the other hand, since the aluminum busbar 2032 also has a current-carrying function, it cannot be too thin, otherwise it will cause the aluminum busbar 2032 to be broken down by a large current. Therefore, two grooves 20321 can be provided on the aluminum busbar 2032, the structure of which can be referred to... Figure 7 The schematic diagram of one side of the aluminum busbar 2032 shown is as follows: Figure 9 The cross-sectional view of the aluminum busbar 2032 along the Z-direction shown indicates that the depth h2 of the two grooves 20321 is less than or equal to 2mm. The projections of the two grooves 20321 in the Z-direction respectively cover the projections of the positive terminal of one battery cell 2031 and the negative terminal of the other battery cell 2031 in the Z-direction. The Z-direction is the direction in which the cover plate 201 covers the housing 204. The two grooves 20321 are positioned directly opposite the corresponding welded terminals to ensure that the thickness of the welded portion between the aluminum busbar 2032 and the terminal is moderate. This ensures the effectiveness of the laser welding between the aluminum busbar 2032 and the terminal and prevents current breakdown due to excessive thinness of the aluminum busbar 2032. The two grooves 20321 can be positioned facing or away from the terminal. The back side of the aluminum busbar 2032 without grooves 20321 can be referenced. Figure 8 The diagram shows the structure of the other side of the aluminum busbar 2032.

[0044] When laser welding the aluminum busbar 2032 and the electrode post, alignment issues can arise. If the aluminum busbar 2032 and the battery cell 2031 are misaligned, the welding area may be reduced, leading to a weak weld, which in turn reduces the current-carrying area and increases the risk of thermal runaway. Therefore, two grooves 20321 can be provided on the aluminum busbar 2032. The openings of the two grooves 20321 face the positive electrode post of one battery cell 2031 and the negative electrode post of the other battery cell 2031, respectively. One groove 20321 is used to accommodate the positive electrode post of one battery cell 2031, and the other groove 20321 is used to accommodate the negative electrode post of the other battery cell 2031. With this design, the two grooves 20321 can limit the movement of the battery cell 2031 and prevent misalignment during laser welding. The gap between the inner wall of one of the grooves and the positive terminal of one of the cells 2031 is less than or equal to 0.5mm, and the gap between the inner wall of the other groove and the negative terminal of another cell 2031 is less than or equal to 0.5mm. This allows for some floating space in the position of the cells 2031 during the assembly of the battery module due to the compression of the silicone foam between the cells 2031. At the same time, a gap of less than or equal to 0.5mm is also provided between the plastic bracket 2033 and the aluminum busbar 2032 to accommodate the floating.

[0045] Continue to refer to Figure 10The diagram shows another exploded view of the battery pack 200. The battery pack 200 also includes a BMU205 (Battery Management Unit), which is electrically connected to the battery module 203. The BMU205 is used for intelligent management and maintenance of each battery cell 2031, preventing overcharging and over-discharging, extending battery life, and monitoring battery status. The BMU205 can also serve as a communication unit for the battery pack 200. On one hand, sampling devices, such as NTC (Negative Temperature Coefficient) thermistors, temperature sensors, or voltage sensors, are installed on the top surface of each battery cell 2031. Sampling lines are connected to the sampling devices and the BMU205, allowing the BMU205 to acquire the operating status of the battery cell 2031 and send information to the next higher-level management system. Similarly, the BMU205 can also receive information from other communication systems. To achieve electrical isolation between the battery module 203 and the BMU205 board, the battery pack 200 includes a separator 206 and an end plate 207. The separator 206 divides the housing 204 into two compartments, one for housing the battery module 203 and the other for housing the battery management unit. Specifically, the separator 206 is located between the battery module 203 and the BMU205. A second opening 2042 is provided on one side wall of the housing 204, perpendicular to the cover plate 201. The battery management unit is located between the separator 206 and the second opening 2042, and the end plate 207 is fastened to the second opening 2042. The inner surface 2072 of the end plate 207 faces the BMU205 board. Figure 11 The schematic diagram shows the structure of the inner surface 2072 of the end plate 207. The inner surface 2072 of the end plate 207 has a second protrusion 2074 facing the battery management unit (BMU). A second thermal pad is disposed between the second protrusion 2074 and the BMU board. The thermal conductivity of the second thermal pad can be between 2.8 and 3.5 W / mK. The BMU board includes power devices and other heat-generating components, which can be transferred to the outside of the end plate 207 through the second thermal pad and the second protrusion 2074, enhancing the heat dissipation effect of the BMU 205. Similarly, the second thermal pad is an elastic thermal pad, ensuring no gap between the second thermal pad and the second protrusion 2074.

[0046] It should be understood that a second heat dissipation fin 2071 can also be provided on the surface of the end plate 207 away from the battery management unit, and its structure can be referred to Figure 12 The diagram shows the structure of the outer surface 2073 of the end plate 207. The second heat dissipation tooth 2071 on the end plate 207 is positioned opposite to the second protrusion 2074 on the inner surface of the end plate 207. The arrangement of the second heat dissipation tooth 2071 can increase the heat dissipation area and improve the heat dissipation effect.

[0047] Furthermore, thermally conductive adhesive can be applied to the bottom wall of the housing 204. This adhesive is located between the bottom wall of the housing 204 and the bottom surface of the battery module 203, and its thermal conductivity is between 2.8 and 3.5 W / mK. With the thermally conductive adhesive between the bottom surface of the battery module 203 and the bottom wall of the housing 204, the heat generated by the battery module 203 can be promptly transferred to the outside of the housing 204 through the bottom wall, enhancing the heat dissipation capacity of the battery pack 200.

[0048] Since the cover plate 201 of the battery pack 200 is a metal cover plate 201, in order to ensure the insulation effect between the battery module 203 and the cover plate 201, insulating paint can be sprayed on the inner surface 2012 of the cover plate 201. The insulating paint can be a high-temperature resistant nano-composite ceramic-based insulating protective coating.

[0049] Since the cover plate 201 of the battery pack 200 is a metal cover plate 201, in order to ensure the insulation effect between the battery module 203 and the cover plate 201, a ceramic composite tape can be wrapped around the inner surface 2012 of the cover plate 201.

[0050] Based on the same inventive concept, this application provides an energy storage cabinet, which includes a cabinet body and a plurality of battery packs 200 as described above located inside the cabinet body. The plurality of battery packs 200 are stacked to increase the capacity of the energy storage cabinet.

[0051] Based on the same inventive concept, this application provides a data center, which includes a load and an energy storage cabinet as described above, the energy storage cabinet being used to supply power to the load.

[0052] The above-described embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. 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 of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, characterized in that, The battery pack includes a cover plate, a housing, and a battery module housed within the housing. The cover plate covers the housing. The battery module includes multiple battery cells. Any two adjacent battery cells are electrically connected via an aluminum busbar. The two ends of the aluminum busbar are respectively connected to the positive terminal of one of the two battery cells and the negative terminal of the other battery cell. The cover plate has a boss facing the inner surface of the box, and a thermal pad is provided between the boss and the aluminum strip.

2. The battery pack according to claim 1, characterized in that, In the height direction of the battery pack, the thickness of the cover plate is less than the height of the battery module, and the height of the battery module is less than the height of the housing.

3. The battery pack according to claim 1 or 2, characterized in that, The aluminum busbar has two grooves, the depth of which is less than or equal to 2mm. The projections of the two grooves in the height direction of the battery pack respectively cover the projections of the positive terminal of one of the cells in the height direction of the battery pack and the projections of the negative terminal of the other cell in the height direction of the battery pack.

4. The battery pack according to claim 3, characterized in that, The openings of the two grooves face the positive terminal of one of the battery cells and the negative terminal of the other battery cell, respectively. One of the grooves is used to accommodate the positive terminal of one of the battery cells, and the other groove is used to accommodate the negative terminal of the other battery cell. The gap between the inner wall of one of the grooves and the positive terminal of one of the battery cells is less than or equal to 0.5 mm, and the gap between the inner wall of the other groove and the negative terminal of the other battery cell is less than or equal to 0.5 mm.

5. The battery pack according to claim 1 or 2, characterized in that, The battery pack includes a separator, an end plate, and a battery management unit. The separator divides the housing into two compartments, one for housing the battery module and the other for housing the battery management unit. An opening is provided on one side wall of the housing, perpendicular to the cover plate. The battery management unit is located between the separator and the opening. The end plate is fastened to the opening and has a protrusion facing the battery management unit. A thermal pad is provided between the protrusion and the single plate of the battery management unit.

6. The battery pack according to claim 5, characterized in that, The surface of the cover plate facing away from the housing is provided with heat dissipation teeth, and the heat dissipation teeth and the protrusions of the cover plate are arranged opposite to each other.

7. The battery pack according to claim 5, characterized in that, The end plate has heat dissipation teeth on its surface away from the battery management unit, and the heat dissipation teeth on the end plate are opposite to the boss on the end plate.

8. The battery pack according to any one of claims 1, 2, 4 or 6, characterized in that, The bottom wall of the housing is provided with thermally conductive adhesive, which is located between the bottom wall of the housing and the bottom surface of the battery module.

9. The battery pack according to claim 8, characterized in that, The inner surface of the cover plate is coated with insulating varnish.

10. The battery pack according to claim 8, characterized in that, The inner surface of the cover plate is covered with a ceramic composite strip.

11. An energy storage cabinet, characterized in that, The energy storage cabinet includes a cabinet body and a plurality of battery packs as described in any one of claims 1-10 located within the cabinet body, wherein the plurality of battery packs are stacked.

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