Battery pack

Abstract

The application provides a battery pack, comprising a box, a plurality of battery modules and a connecting piece; the box has a containing cavity; the battery modules are arranged in a stack from top to bottom in the containing cavity; the box has a through groove which penetrates from the inside to the outside; the connecting ends of the battery modules are located at the through groove, and the connecting ends of two adjacent battery modules from top to bottom are located in the same through groove; the connecting piece is arranged in the through groove and is electrically connected with the connecting ends of the two adjacent battery modules from top to bottom, and the two adjacent battery modules from top to bottom are electrically conducted through the connecting piece. The application solves the problem of the complicated assembly of the battery pack in the prior art.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery pack. Background Technology

[0002] Existing multi-layer battery packs typically consist of multiple independent cells bolted together into a single unit. Each cell layer requires interconnection via staggered copper busbars and other components, resulting in overly complex assembly. Furthermore, the numerous and overlapping sealing surfaces lead to unreliable sealing. Additionally, the use of cast aluminum incurs high mold costs, and the draft angle results in unevenness on the inner wall of the pack. Moreover, the cast aluminum process cannot guarantee strength at all locations, easily leading to invisible defects. Utility Model Content

[0003] The main objective of this application is to provide a battery pack that solves the problem of overly complex battery pack assembly in the prior art.

[0004] To achieve the above objectives, according to one aspect of this application, a battery pack is provided, comprising: a housing having a receiving cavity; a plurality of battery modules stacked vertically within the receiving cavity, the housing having a through groove extending through both the inside and outside, the connection ends of the battery modules being located at the through groove, and the connection ends of two adjacent battery modules being located within the same through groove; and a connector disposed within the through groove, and the connector being electrically connected to the connection ends of two adjacent battery modules, with the two adjacent battery modules being electrically connected to each other through the connector.

[0005] Furthermore, the connection terminals of two adjacent battery modules are the positive and negative terminals, respectively, and the two adjacent battery modules are connected in series through connectors.

[0006] Furthermore, the battery pack also includes: a seal, which is disposed at the edge of the through groove; a side cover, which is disposed at the through groove, and the seal is located between the outer surface of the casing and the side cover, sealing the gap between the casing and the side cover.

[0007] Furthermore, there are multiple through slots, and a through slot is provided between any two adjacent battery modules, with each through slot separated from the others.

[0008] Furthermore, the battery pack also includes a liquid cooling plate, which is installed inside the housing, and a liquid cooling plate is installed between two adjacent battery modules.

[0009] Furthermore, the battery pack also includes a positioning component, which is disposed inside the housing and connected to the housing or battery module. The liquid cooling plate has a positioning structure, and the positioning component and the positioning structure are positioned and matched to limit the liquid cooling plate.

[0010] Furthermore, the battery pack also includes an adhesive layer. An adhesive layer is provided between the battery module and the inner wall of the housing, and between the liquid cooling plate and the battery module. The battery module is connected to the liquid cooling plate and the housing through the adhesive layer.

[0011] Furthermore, the battery pack also includes multiple end plates, which are replaceably mounted upright inside the housing and located at the ends of the battery modules, with at least two end plates having different thicknesses.

[0012] Furthermore, end plates are provided on both opposite sides of the inner wall of the box, and the battery pack also includes a bracket. At least one end plate is connected to the bracket, and the bracket is detachably connected to the battery pack. The end plate on the bracket is closer to the battery module than the bracket.

[0013] Furthermore, the enclosure includes: a bottom plate; side plates, the side plates and the bottom plate forming a receiving cavity with a top opening, and a through groove located on the side plates; a top cover, the top cover covering the top opening of the receiving cavity and shielding the battery module inside the receiving cavity; a bottom protective plate, the bottom protective plate located below the bottom plate; a buffer layer, the buffer layer located between the bottom protective plate and the bottom plate; and a sealing layer, the sealing layer being disposed at the edge of the bottom protective plate and between the edge of the bottom plate, and sealing the gap between the buffer layer and the bottom plate.

[0014] By applying the technical solution of this application, battery modules are stacked vertically within the housing cavity of the casing, achieving a multi-layer battery module structure within a single casing, thereby simplifying assembly. Furthermore, this embodiment places the connection ends of two adjacent battery modules within the same through-groove, achieving electrical connection between the connection ends within the through-groove through a connector. The connector, acting as a conductor, facilitates electrical connection between the two connection ends, enabling electrical connection between adjacent battery modules. This method allows for the connection of adjacent battery modules in pairs, achieving electrical conductivity between all battery modules. It eliminates the need for complex methods such as staggered copper busbar arrangements to achieve electrical connections between different battery modules, and also eliminates the need to locate the electrical connections, simplifying the battery pack assembly process. The above-mentioned configuration simplifies assembly by using a single-box design, saving costs on interlayer bolts, bolting equipment, and labor, thus improving efficiency. It also allows the use of extruded profiles, reducing mold costs and avoiding wasted space due to uneven inner walls caused by draft angles. This ensures uniform strength across all locations. Furthermore, the use of side through-slots and connectors saves on electrical connections between upper and lower modules, eliminating the need for copper busbars, input poles, bolts, and positioning features, thereby reducing costs. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 A front view of the battery pack of this application is shown; Figure 2 This application shows Figure 1 Schematic diagram of AA section; Figure 3 This application shows Figure 2 An enlarged view of point B; Figure 4 A schematic diagram of the structure at the through groove of this application is shown; Figure 5 A structural schematic diagram of the through groove, connector, and seal of this application is shown; Figure 6 A top view of the battery pack of this application is shown; Figure 7 This application shows Figure 6 A schematic diagram of the CC section; Figure 8 This application shows Figure 7 An enlarged schematic diagram of point D; Figure 9 A side view of the battery pack of this application is shown.

[0016] The above figures include the following reference numerals: 10. Housing; 11. Through groove; 12. Weld; 20. Battery module; 21. Connection end; 30. Connector; 40. Seal; 50. Side cover; 60. Liquid cooling plate; 70. Positioning component; 80. Adhesive layer; 90. End plate; 100. Bracket; 110. Bottom plate; 120. Side plate; 130. Top cover; 140. Bottom protective plate; 150. Buffer layer; 160. Sealing layer; 170. Front cover. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] In this application, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this application.

[0020] To address the problem of overly complex battery pack designs in existing technologies, this application provides a battery pack.

[0021] like Figures 1 to 9 The battery pack shown includes a housing 10, multiple battery modules 20, and a connector 30. The housing 10 has a receiving cavity. The battery modules 20 are stacked vertically within the receiving cavity. The housing 10 has a through groove 11 extending through both the inside and outside. The connection end 21 of the battery module 20 is located at the through groove 11, and the connection ends 21 of two adjacent battery modules 20 are located in the same through groove 11. The connector 30 is disposed in the through groove 11 and is electrically connected to the connection ends 21 of two adjacent battery modules 20. The two adjacent battery modules 20 are electrically connected to each other through the connector 30.

[0022] like Figures 2 to 5 As shown, in this embodiment, battery modules 20 are stacked vertically within the housing cavity of the casing 10, achieving a multi-layer battery module structure within a single casing, thus simplifying assembly. Furthermore, this embodiment places the connection ends 21 of two adjacent battery modules 20 within the same through slot 11, and uses connectors 30 to electrically connect the connection ends 21 within the through slot 11. The connectors 30, acting as conductors, facilitate electrical connection between the two connection ends 21, enabling electrical connection between two adjacent battery modules 20. This method allows for the connection of adjacent layers of battery modules 20 in pairs, achieving electrical conductivity between all battery modules 20. It eliminates the need for complex methods such as staggered copper busbar arrangements to connect different battery modules 20, and also eliminates the need to locate the electrical connections, simplifying the battery pack assembly process. The above-mentioned configuration simplifies assembly by using a single-box design, saving costs on interlayer bolts, bolting equipment, and labor, thus improving efficiency. It also allows the use of extruded profiles, reducing mold costs and avoiding wasted space due to uneven inner walls caused by draft angles. It ensures uniform strength across all locations. Furthermore, the use of side through-slots 11 in conjunction with connectors 30 saves on electrical connections between upper and lower modules, eliminating the need for copper busbars, input poles, bolts, and positioning features, thereby reducing costs.

[0023] In this embodiment, the connector 30 can be a conductive metal sheet. The metal sheet can be connected to the connector end 21 by welding or other means, thereby ensuring the reliability of the connection.

[0024] like Figures 2 to 4As shown, in this embodiment, the connection ends 21 of two adjacent battery modules 20 are the positive and negative terminals, respectively. These positive and negative terminals are located within the same through-groove 11, allowing the positive and negative terminals of two adjacent battery modules 20 to be connected via connectors 30, thus achieving series connection between the battery modules 20. Of course, the positive and negative terminals of the two connection ends 21 located within the same through-groove 11 can be adjusted as needed. For example, in this embodiment, the battery cells are arranged in a certain direction to form the battery module 20, so that the two connection ends 21 within the through-groove 11 are the positive and negative terminals, respectively. In this case, connecting the connectors 30 will achieve series connection between the battery modules 20. In another embodiment, the direction of the battery cells can be adjusted so that both connection ends 21 within the through-groove 11 are either positive or negative terminals. In this case, connecting the connectors 30 will achieve parallel connection between the battery modules 20. This allows for adjustment of the relationship between the battery modules 20 as needed, improving adaptability.

[0025] like Figure 1 , Figure 5 As shown, the battery pack in this embodiment also includes a seal 40 and a side cover 50. The seal 40 is disposed at the edge of the through groove 11. The seal 40 can be a sealing strip, which can be continuously disposed along the circumference of the through groove 11 to surround the entire side of the through groove 11. The side cover 50 is disposed on the through groove 11. The seal 40 is located between the outer surface of the housing 10 and the side cover 50, which can seal the gap between the housing 10 and the side cover 50. After the positive and negative terminals are electrically connected by welding the connector 30, the positive terminal and the negative terminal, the side cover 50 is assembled. A sealing strip is disposed between the side cover 50 and the outer surface of the housing 10. This realizes the series connection of the battery modules 20 in the battery pack while sealing the entire through groove 11, preventing water leakage and other situations that could cause the electrical connection to fail, and ensuring the reliability of the electrical connection.

[0026] like Figure 4As shown, this embodiment has multiple through slots 11, and each of any two adjacent battery modules 20 is provided with a through slot 11, so that the connection ends 21 of two adjacent battery modules 20 can be placed in the same through slot 11. These two connection ends 21 are the positive and negative terminals, respectively. A welded connector 30, the positive terminal, and the negative terminal are used to connect the two battery modules 20 in series. Any two adjacent battery modules 20 are connected in series in this way, thus achieving electrical conductivity for all battery modules 20 within the battery pack. Meanwhile, each through slot 11 is spaced apart from the others. Only the connection ends 21 of two adjacent battery modules 20 are exposed, ensuring that the electrical connection between battery modules 20 is not affected by other factors due to excessive exposure. It also ensures that the electrical connection between two adjacent battery modules 20 is not affected by other battery modules 20 or other components. Furthermore, each through slot 11 is equipped with a seal 40 and a side cover 50 for sealing, which can improve the reliability of the seal, reduce the sealing surface, avoid the sealing surface crossing, simplify the assembly of the battery pack, and save the cost of interlayer sealant, glue application machine and labor time, thereby improving efficiency.

[0027] Of course, in addition to setting multiple through slots 11, there can also be one through slot 11. In this case, the through slot 11 can be installed between three or more battery modules 20, so that more than two pairs of connecting ends 21 can be accommodated in one through slot 11 and at least two connectors 30 can be installed. The connectors 30 are connected to the corresponding connecting ends 21 respectively. In this case, only one seal 40 and one side cover 50 can be installed in the through slot 11.

[0028] like Figure 3 As shown, the battery pack in this embodiment also includes a liquid cooling plate 60, which is disposed inside the housing 10. A liquid cooling plate 60 is disposed between two adjacent battery modules 20, so that each battery module 20 has a top and bottom double-sided liquid cooling plate 60. The battery module 20 can exchange heat through the two layers of liquid cooling plates 60, thereby improving the heat exchange effect of the battery pack.

[0029] like Figure 8As shown, the battery pack in this embodiment also includes a positioning component 70, which can be a pin or the like. The positioning component 70 is disposed inside the housing 10 and connected to the housing 10 or the battery module 20. The liquid cooling plate 60 has a positioning structure, which can be a positioning hole or the like. The positioning component 70 is positioned and engaged with the positioning structure to limit the liquid cooling plate 60. It should be noted that the positioning component 70 and the positioning structure in this embodiment are only positioned together; there is no locking relationship between them. That is, when installing the liquid cooling plate 60, the positioning structure on it is aligned with the positioning component 70, and then the positioning component 70 passes through the positioning structure to position the liquid cooling plate 60. At this time, the liquid cooling plate 60 can be removed upwards or moved laterally in a small range without being locked. This avoids the risk of the liquid cooling plate 60 cracking due to stress concentration at the locking point, which could lead to coolant leakage and ensure the reliability of the battery pack. It allows the liquid cooling plate 60 and the battery module 20 to be stacked vertically as independent parts, reducing unnecessary assembly and fixing designs. At the same time, as an independent part, the liquid cooling plate 60 is not welded or bolted to the housing 10, which greatly reduces the heat conduction path, improves thermal management performance, reduces the number of bolt positions, eliminates the risk of bolt loosening, and avoids contact corrosion between the exposed steel bolts and the aluminum housing due to potential difference, thus enhancing the corrosion resistance of the housing exterior.

[0030] like Figure 3 As shown, the battery pack in this embodiment also includes an adhesive layer 80. An adhesive layer 80 is provided between the battery module 20 and the inner wall of the housing 10, and between the liquid cooling plate 60 and the battery module 20. The adhesive layer 80 can be a thermally conductive structural adhesive, etc. After the housing 10 is coated with thermally conductive structural adhesive, the battery module 20 is installed. After the top of the battery module 20 is coated with thermally conductive structural adhesive, the liquid cooling plate 60 is placed. Subsequently, the battery module 20 and the liquid cooling plate 60 are assembled by cyclically placing the battery module 20 and the liquid cooling plate 60 and fixing them with thermally conductive structural adhesive. The thermally conductive structural adhesive can fix the battery module 20 and the liquid cooling plate 60 and fix the battery module 20 and the liquid cooling plate 60 to the housing 10. At the same time, the thermally conductive structural adhesive can ensure the heat exchange effect between the cold plate and the battery module 20, and ensure the heat exchange effect and installation reliability of the entire battery pack.

[0031] like Figure 7As shown, the battery pack in this embodiment also includes multiple end plates 90. The end plates 90 are replaceably and uprightly placed inside the housing 10 and located at the ends of the battery module 20. At least two end plates 90 have different thicknesses, so that an end plate 90 of appropriate thickness can be selected as needed to make the thickness of the end plate 90 compatible with the battery module 20. During installation, the end plates 90 can be first locked inside the receiving cavity of the housing 10 as a clearance for the battery module 20 to be installed in the receiving cavity. End plates 90 of different thicknesses can be replaced according to the matching degree between the battery module 20 and the receiving cavity, so that the battery module 20 can be embedded into the receiving cavity without any margin and will not move within the receiving cavity. This avoids problems such as the battery module 20 moving within the receiving cavity affecting its use or causing thermal runaway, explosion, etc., thus ensuring the reliability and safety of the battery pack installation.

[0032] like Figure 7 As shown, in this embodiment, end plates 90 are provided on both opposite sides of the inner wall of the housing 10, which can better abut against the battery module 20 and ensure that the battery module 20 will not shift within the receiving cavity. The battery pack also includes a bracket 100, a water pipe assembly, and an electrical assembly. At least one end plate 90 is connected to the bracket 100. The bracket 100 is detachably connected to the battery pack. The end plate 90 on the bracket 100 is closer to the battery module 20 relative to the bracket 100. The water pipe assembly and the electrical assembly are mounted on the bracket 100, and the water pipe assembly and the electrical assembly are located on the side of the bracket 100 away from the end plate 90. The electrical assembly ensures... To ensure the normal charging and discharging of the battery pack, the water-cooling component provides liquid cooling circulation for the liquid cooling plate 60, ensuring the heat exchange effect of the battery pack. The electrical components, water-cooling components, and battery module 20 are isolated by the bracket 100 and end plate 90, ensuring that the components cooperate with each other to ensure the normal operation of the battery pack, while preventing mutual interference if problems occur between components, thus ensuring the safety of the battery module 20. Using an extruded material such as the end plate 90 reduces mold costs, avoids wasting space due to uneven inner walls caused by draft angles, ensures uniform strength at all locations, simplifies battery pack assembly, and ensures battery pack safety. In this embodiment, only one end plate 90 is used in conjunction with the bracket 100, while the other end plate 90 is directly installed on the inner wall of the housing 10. During installation, the other end plate 90 is first installed and fixed to the inner wall of the housing 10, then the battery module 20 and liquid cooling plate 60 are installed, and finally the bracket 100 and its end plate 90 are installed to the other side of the housing, completing the overall assembly.

[0033] like Figure 3As shown, the housing 10 in this embodiment includes: a bottom plate 110, a side plate 120, a top cover 130, a front cover 170, a bottom protective plate 140, a buffer layer 150, and a sealing layer 160. The side plate 120 and the bottom plate 110 are welded together to form a receiving cavity with a top opening. A bottom liquid cooling plate is welded to the upper surface of the bottom plate 110, and there is a weld 12 between the bottom plate 110 and the bottom liquid cooling plate. The weld 12 has a sealing property. Thermally conductive structural adhesive is applied to the bottom liquid cooling plate 60. The battery module 20 is installed into the receiving cavity through the top opening and fixed by the thermally conductive structural adhesive. A through groove 11 is formed on the side plate 120. The connection end 21 of the battery module 20 is located in the through groove 11, and the electrical connection between all battery modules 20 is realized through the connector 30. Since there are multiple through grooves 11, the through grooves 11 can be set on the same side of the side plate 120 or on different sides. The top cover 130 is installed over the top opening of the receiving cavity and covers the battery module 20 inside the cavity, ensuring that the battery module 20 is not exposed and that it is reliably installed inside the housing 10. The front cover 170 can be installed on the bracket 100 and can cover the water pipe assembly and electrical components on the outside of the bracket 100, thereby protecting the water pipe assembly and electrical components. The bottom protective plate 140 is located below the bottom plate 110, ensuring the installation reliability of the entire housing 10. The buffer layer 150 is located between the bottom protective plate 140 and the bottom plate 110. The buffer layer 150 can be filled with foam or other cushioning materials to provide further protection for the battery pack, ensuring reliable installation of the battery pack while providing a certain degree of impact resistance. The bottom protective plate 140 can be set only in the middle area of ​​the bottom plate 110, while the edge area can be without the bottom protective plate 140. In this case, the sealing layer 160 can be set between the edge of the bottom protective plate 140 and the edge of the bottom plate 110. The sealing layer 160 can be a sealing strip, which is set continuously for 360 degrees along the circumference of the bottom plate 110, thereby sealing the gap between the buffer layer 150 and the bottom plate 110, ensuring the sealing of the bottom of the battery pack, ensuring the sealing while increasing the overall pack strength, and ensuring the reliability of the single-box multi-layer battery module 20.

[0034] In this embodiment, the battery pack is an integrated structure of a single-box, multi-layer module. Two end plates 90 are respectively locked to the brackets 100 at the rear and front of the box 10. Thermally conductive structural adhesive is applied to the bottom liquid cooling plate at the bottom of the box 10. Battery modules 20, with positive and negative terminals, are alternately stacked within the receiving cavity of the box 10. The positive and negative terminals are located in the through grooves 11 on the side of the box 10. Movable liquid cooling plates 60 are installed between each battery module 20. The battery modules 20 and the liquid cooling plates 60 are connected and fixed using thermally conductive structural adhesive. The top of the uppermost battery module 20 also needs to be coated with thermally conductive structural adhesive and connected to the liquid cooling plate 60, so that the battery modules 20... Liquid cooling plates 60 are installed at both the bottom and top, giving all battery modules 20 double-sided liquid cooling. After the battery modules 20 are installed, the positive and negative terminals in the through slot 11 are electrically connected by welding connecting pieces, making all battery modules 20 electrically conductive. After the side cover 50 is installed at the through slot 11, a sealing strip is added for sealing. After the water pipe assembly and electrical assembly are installed on the bracket 100, the front cover 170 and the top cover 130 are installed and a sealing strip for easy maintenance is added. After the top cover 130 is installed, it is also sealed with a sealing strip to ensure reliable installation of the entire battery pack, realizing an integrated structure of multi-layer modules in a single box, which simplifies the assembly of the battery pack.

[0035] It should be noted that "multiple" in the above embodiments refers to at least two.

[0036] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects: 1. It solves the problem of overly complex battery packaging in existing technologies; 2. The relationship between battery modules can be adjusted as needed to improve adaptability; 3. Each battery module has top and bottom double-sided liquid cooling plates, which can exchange heat through the two liquid cooling plates, improving the heat exchange effect of the battery pack. 4. The liquid cooling plate is an independent component and is not welded or bolted to the housing, which greatly reduces the heat conduction path and improves thermal management performance. 5. The end plate allows the battery module to be embedded into the receiving cavity without any margin, preventing it from moving within the cavity. This avoids problems such as thermal runaway or explosion caused by the battery module moving within the receiving cavity, ensuring the reliability and safety of the battery pack installation. 6. The integrated structure of a single-box multi-layer module simplifies the assembly of the battery pack.

[0037] Obviously, the embodiments described above are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort should fall within the scope of protection of this application.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery pack, characterized in that, include: The housing (10) has a receiving cavity; Multiple battery modules (20) are stacked in the cavity. The housing (10) has a through groove (11) that runs through the inside and outside. The connection end of the battery module (20) is located in the through groove (11), and the connection ends of two adjacent battery modules (20) are located in the same through groove (11). A connector (30) is disposed in the through groove (11) and is electrically connected to the connection ends (21) of two adjacent battery modules (20) above and below. The two adjacent battery modules (20) are electrically connected through the connector (30).

2. The battery pack according to claim 1, characterized in that, The connection ends of two adjacent battery modules (20) are the positive and negative terminals, respectively, and the two adjacent battery modules (20) are connected in series through the connector (30).

3. The battery pack according to claim 1, characterized in that, The battery pack also includes: A sealing element (40) is disposed at the edge of the through groove (11); Side cover (50) is provided on the through groove (11), and the sealing element (40) is located between the outer surface of the box body (10) and the side cover (50), and seals the gap between the box body (10) and the side cover (50).

4. The battery pack according to claim 1, characterized in that, There are multiple through slots (11), and each of the two adjacent battery modules (20) is provided with a through slot (11), and each through slot (11) is separated from each other.

5. The battery pack according to any one of claims 1 to 4, characterized in that, The battery pack also includes a liquid cooling plate (60), which is disposed inside the housing (10), and the liquid cooling plate (60) is disposed between two adjacent battery modules (20) in the upper and lower positions.

6. The battery pack according to claim 5, characterized in that, The battery pack also includes a positioning element (70), which is disposed inside the housing (10) and connected to the housing (10) or the battery module (20). The liquid cooling plate (60) has a positioning structure, and the positioning element (70) is positioned and cooperates with the positioning structure to limit the liquid cooling plate (60).

7. The battery pack according to claim 5, characterized in that, The battery pack also includes an adhesive layer (80), which is provided between the battery module (20) and the inner wall of the housing (10), and between the liquid cooling plate (60) and the battery module (20). The battery module (20) is connected to the liquid cooling plate (60) and the housing (10) through the adhesive layer (80).

8. The battery pack according to any one of claims 1 to 4, characterized in that, The battery pack also includes a plurality of end plates (90), which are replaceably mounted inside the housing (10) and located at the ends of the battery module (20), and at least two of the end plates (90) have different thicknesses.

9. The battery pack according to claim 8, characterized in that, The end plates (90) are provided on both opposite sides of the inner wall of the housing (10). The battery pack also includes a bracket (100). At least one end plate (90) is connected to the bracket (100). The bracket (100) is detachably connected to the battery pack. The end plate (90) on the bracket (100) is closer to the battery module (20) relative to the bracket (100).

10. The battery pack according to claim 8, characterized in that, The housing (10) includes: Base plate (110); A side plate (120) and a bottom plate (110) form a receiving cavity with a top opening, and a through groove (11) is located on the side plate (120); Top cover (130) is provided on the top opening of the receiving cavity and covers the battery module (20) inside the receiving cavity; A bottom protective plate (140) is located below the bottom plate (110); A buffer layer (150) is located between the bottom protective plate (140) and the bottom plate (110); A sealing layer (160) is disposed between the edge of the bottom guard plate (140) and the edge of the bottom plate (110), and seals the gap between the buffer layer (150) and the bottom plate (110).

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