Battery pack

Abstract

The utility model discloses a battery pack. The battery pack comprises a shell, a battery pack body and a battery pack, the beam structure is arranged in the shell; the module is arranged in the shell, the module comprises a plurality of battery cells stacked in the first direction, each battery cell comprises an anti-explosion valve, the anti-explosion valves are located on the same side or two sides of the module in the second direction, the beam structure and the anti-explosion valves are oppositely arranged and spaced in the second direction, and the lowest point of the upper surface of the beam structure is higher than the highest point of the anti-explosion valves in the vertical direction; the first direction, the second direction and the vertical direction are vertical pairwise. According to the battery pack disclosed by the utility model, heat and other substances jetted in the pressure relief and exhaust process of the anti-explosion valve are blocked by the beam structure, so that the situations of explosion or fire and the like caused by heat spreading are effectively avoided, and the safety of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a battery pack. Background Art

[0002] The pursuit of high energy density has gradually become the mainstream of power battery research. However, high energy density is also accompanied by high safety risks. In the existing technology, the battery pack is usually composed of multiple modules. However, when the explosion-proof valve of the battery cell of one module is opened to release pressure, heat spread is prone to cause explosion or fire, which poses certain risks. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery pack, which effectively avoids explosion or fire caused by heat spread, thereby improving the safety of the battery pack.

[0004] According to the battery pack of the utility model embodiment, it includes: a shell; a beam structure, the beam structure is arranged in the shell; a module, the module is arranged in the shell, the module includes a plurality of battery cells stacked along a first direction, each of the battery cells includes an explosion-proof valve, and the plurality of explosion-proof valves are located on the same side or both sides of the module along a second direction, along the second direction, the beam structure and the explosion-proof valve are arranged opposite to each other and spaced apart, along the up-down direction, the lowest point of the upper surface of the beam structure is higher than the highest point of the explosion-proof valve, and the first direction, the second direction and the up-down direction are perpendicular to each other.

[0005] According to the battery pack of the utility model embodiment, the beam structure is arranged in the shell, the module is arranged in the shell, the module includes a plurality of battery cells stacked along a first direction, each battery cell includes an explosion-proof valve, and the plurality of explosion-proof valves are located on the same side or both sides of the module along a second direction. Along the second direction, the beam structure and the explosion-proof valve are arranged opposite to each other, and along the up and down directions, the lowest point of the upper surface of the beam structure is higher than the highest point of the explosion-proof valve, so that the heat and other substances ejected during the pressure relief and exhaust process of the explosion-proof valve are blocked by the beam structure, thereby effectively avoiding the occurrence of heat spread leading to explosion or fire, etc., and improving the safety of the battery pack.

[0006] In some embodiments of the utility model, the beam structure includes a first beam and a second beam connected to each other, the first beam extends along the first direction, the second beam extends along the second direction, the first beam and the second beam divide the cavity in the shell into a plurality of sub-cavities, the number of the modules corresponds one-to-one to the number of the sub-cavities, and one module is provided in each sub-cavity.

[0007] In some embodiments of the present invention, when the plurality of explosion-proof valves are located on both sides of the module along the second direction, the plurality of explosion-proof valves are located at the same height along the up-down direction.

[0008] In some embodiments of the utility model, the battery cell also includes: a shell, the two ends of the shell along the second direction are open to form an open opening, and a pole group is arranged in the shell; a positive cover plate, the positive cover plate blocks one of the open openings and is connected to the shell, and the positive pole ear of the pole group is connected to the positive cover plate; a negative cover plate, the negative cover plate blocks the other open opening and is connected to the shell, and the negative pole ear of the pole group is connected to the negative cover plate, and the positive cover plate or the positive cover plate is provided with the explosion-proof valve.

[0009] In some embodiments of the utility model, a negative pole is provided on the negative cover plate, and the explosion-proof valve is provided on the positive cover plate, and when a plurality of the explosion-proof valves are located on both sides of the module along the second direction, the positive pole cover plate of one of any two adjacent battery cells and the negative pole cover plate of the other battery cell are located on the same side of the module along the second direction, and the module further includes: a bus, a plurality of the bus bars, and a plurality of the bus bars are located on both sides of the module along the second direction, and the bus bar is used to connect the negative pole and the positive pole cover of any two adjacent battery cells.

[0010] In some embodiments of the present invention, the bus bar and the explosion-proof valve are spaced apart along the up-down direction.

[0011] In some embodiments of the utility model, a positive electrode column is provided on the positive electrode cover plate, and the bus bar is used to connect the negative electrode column and the positive electrode column of any two adjacent battery cells.

[0012] In some embodiments of the utility model, a negative pole is provided on the negative cover plate, and an explosion-proof valve is provided on the positive cover plate. When a plurality of explosion-proof valves are located on the same side of the module along the second direction, the negative pole cover plates of all the battery cells are located on the same side of the module along the second direction, and any two adjacent negative pole cover plates are spaced apart along the first direction. The module also includes: a bus bar, a plurality of bus bars, and a plurality of bus bars are located on a side of the battery cell close to the negative pole cover plate along the second direction. A plurality of explosion-proof valves are located on a side of the battery cell close to the positive pole cover plate along the second direction. The bus bar is used to connect the negative pole of one of any two adjacent battery cells with the negative pole cover plate of the other battery cell.

[0013] In some embodiments of the utility model, a positive electrode column is also provided on the negative electrode cover plate, and the bus bar is used to connect the negative electrode column and the positive electrode column of any two adjacent battery cells.

[0014] In some embodiments of the utility model, the battery cell further includes: a first insulating member, the first insulating member is connected to the positive electrode cover plate and is located on the side of the positive electrode cover plate away from the negative electrode cover plate; a second insulating member, the second insulating member is connected to the negative electrode cover plate and is located on the side of the negative electrode cover plate away from the positive electrode cover plate.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic top view of a battery pack according to an embodiment of the utility model, wherein the module is not shown;

[0018] Figure 2 is a structural diagram of a module according to a first embodiment of the utility model;

[0019] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 is a structural diagram of a module according to the first embodiment of the utility model from another perspective;

[0021] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0022] Figure 6 is a structural diagram of a module according to a second embodiment of the utility model;

[0023] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0024] Figure 8 is a structural diagram of a module according to a second embodiment of the utility model from another perspective;

[0025] Fig. 9 yes Figure 8 Enlarged view of point D in the middle;

[0026] Fig.10 is a structural diagram of a module according to a third embodiment of the utility model;

[0027] Fig.11 yes Fig.10 Enlarged view of point E in the middle;

[0028] Fig.12 is a structural diagram of a module according to a third embodiment of the utility model from another perspective;

[0029] Fig.13 yes Fig.12 Enlarged view of point F in the middle;

[0030] Fig.14 is a structural diagram of a module according to a fourth embodiment of the utility model;

[0031] Fig.15 yes Fig.14 Enlarged view of point G in the middle;

[0032] Fig.16 is a structural diagram of a module according to a fourth embodiment of the utility model from another perspective;

[0033] Fig.17 yes Fig.16 Enlarged view of point H in the middle.

[0034] Reference numerals:

[0035] 100. Battery pack;

[0036] 1. Shell; 11. Cavity; 111. Sub-cavity;

[0037] 2. Beam structure; 21. First beam; 22. Second beam;

[0038] 3. Module; 31. Battery cell; 311. Shell; 312. Positive electrode cover; 3121. Explosion-proof valve; 3122. Positive electrode column; 313. Negative electrode cover; 3131. Negative electrode column; 314. First insulating member; 3141. Explosion-proof hole; 3142. First through hole; 315. Second insulating member; 3151. Second through hole; 3152. Third through hole; 34. Bus. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] A battery pack 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0043] like Figure 1-Figure 17 As shown, the battery pack 100 according to the embodiment of the utility model includes a shell 1, a beam structure 2 and a module 3. Among them, the beam structure 2 is arranged in the shell 1, the module 3 is arranged in the shell 1, the module 3 includes a plurality of battery cells 31 stacked along a first direction, each battery cell 31 includes an explosion-proof valve 3121, and the plurality of explosion-proof valves 3121 are located on the same side or both sides of the module 3 along a second direction. Along the second direction, the beam structure 2 and the explosion-proof valve 3121 are arranged opposite to each other and spaced apart. Along the up-down direction, the lowest point of the upper surface of the beam structure 2 is higher than the highest point of the explosion-proof valve 3121, and the first direction, the second direction and the up-down direction are perpendicular to each other.

[0044] It can be understood that when the pressure inside a battery cell 31 is too high, the pressure inside the battery cell 31 is reduced by venting pressure through the explosion-proof valve 3121, and the beam structure 2 is arranged opposite to and spaced from the explosion-proof valve 3121, and the lowest point of the upper surface of the beam structure 2 is higher than the highest point of the explosion-proof valve 3121, so that the heat and other substances ejected during the pressure relief and exhaust process of the explosion-proof valve 3121 are blocked by the beam structure 2, thereby effectively avoiding the occurrence of heat spread leading to explosion or fire, etc., and improving the safety of the battery pack 100.

[0045] At the same time, by setting multiple explosion-proof valves 3121 on the same side or both sides of the module 3 along the second direction, the versatility and flexibility of the battery pack 100 are improved, so that the battery pack 100 of the present application can adapt to a variety of application scenarios and conditions to meet the needs of different users. For example, when multiple explosion-proof valves 3121 are set on the same side of the module 3 along the second direction, the length of the module 3 along the second direction can be effectively shortened, thereby more effectively utilizing the space, reducing the overall size and weight of the battery pack 100, and the same-side arrangement is convenient for the installation and maintenance of the battery pack 100; or, when multiple explosion-proof valves 3121 are set on both sides of the module 3 along the second direction, the heat distribution inside the module 3 can be more effectively balanced, reducing heat accumulation, thereby improving the operating efficiency and stability of the battery pack 100.

[0046] Furthermore, a protective film is provided on the explosion-proof valve 3121 to protect the explosion-proof valve 3121 , thereby improving the reliability of the explosion-proof valve 3121 and further ensuring the safety of the battery pack 100 .

[0047] According to the battery pack 100 of the embodiment of the utility model, the beam structure 2 is arranged in the shell 1, and the module 3 is arranged in the shell 1. The module 3 includes a plurality of battery cells 31 stacked along a first direction, each battery cell 31 includes an explosion-proof valve 3121, and the plurality of explosion-proof valves 3121 are located on the same side or both sides of the module 3 along a second direction. Along the second direction, the beam structure 2 and the explosion-proof valve 3121 are arranged opposite to each other, and along the up and down directions, the lowest point of the upper surface of the beam structure 2 is higher than the highest point of the explosion-proof valve 3121, so that the heat and other substances ejected during the pressure relief and exhaust process of the explosion-proof valve 3121 are blocked by the beam structure 2, thereby effectively avoiding the occurrence of heat spread leading to explosion or fire, etc., and improving the safety of the battery pack 100.

[0048] In some embodiments of the present invention, Figure 1 As shown, the beam structure 2 includes a first beam 21 and a second beam 22 connected to each other, the first beam 21 extends along the first direction, and the second beam 22 extends along the second direction. The first beam 21 and the second beam 22 divide the cavity 11 in the shell 1 into a plurality of sub-cavities 111, and the number of modules 3 corresponds to the number of sub-cavities 111, and each sub-cavity 111 is provided with a module 3. Thus, the cavity 11 in the shell 1 is divided into a plurality of independent sub-cavities 111 by the first beam 21 and the second beam 22, so that the modules 3 in each sub-cavity 111 are relatively independent, thereby reducing the interference between the modules 3. At the same time, during the pressure relief and exhaust process, the explosion-proof valve 3121 of one of the modules 3 is blocked by the first beam 21 or the second beam 22 due to the ejected heat and other substances, which effectively reduces the thermal shock on other modules 3, thereby reducing the risk of thermal runaway of other modules 3, reducing the risk of heat spread, and improving the safety of the battery pack 100.

[0049] In some embodiments of the present invention, Figure 2-Figure 9 As shown, when multiple explosion-proof valves 3121 are located on both sides of the module 3 along the second direction, multiple explosion-proof valves 3121 are located at the same height along the up-down direction. Thus, by such an arrangement, the lowest point of the upper surface of the beam structure 2 can be higher than the highest point of any explosion-proof valve 3121 without complicated bending or tilting of the beam structure 2, thereby simplifying the layout and structure of the beam structure 2 and reducing costs.

[0050] Furthermore, when the explosion-proof valves 3121 of the modules 3 are located on both sides of the modules 3 along the second direction, the explosion-proof valves 3121 of the modules 3 are located at the same height along the vertical direction. Thus, the layout and structure of the beam structure 2 are further simplified, and the cost is reduced.

[0051] In some embodiments of the present invention, Figure 2-Figure 17 As shown, the battery cell 31 further includes a shell 311, a positive electrode cover plate 312 and a negative electrode cover plate 313. The two ends of the shell 311 along the second direction are open to form an open opening, an electrode group is arranged in the shell 311, the positive electrode cover plate 312 blocks one of the open openings and is connected to the shell 311, the positive electrode ear of the electrode group is connected to the positive electrode cover plate 312, the negative electrode cover plate 313 blocks the other open opening and is connected to the shell 311, the negative electrode ear of the electrode group is connected to the negative electrode cover plate 313, and an explosion-proof valve 3121 is arranged on the positive electrode cover plate 312 or the positive electrode cover plate 312.

[0052] Thus, the outer shell 311 is connected to the positive electrode cover plate 312 and the negative electrode cover plate 313 respectively, so as to ensure that the potential of the battery cells 31 is consistent, and the multiple battery cells 31 in the module 3 are connected in series. At the same time, the outer shell 311 is opened at both ends along the second direction to form an open opening, so as to facilitate the insertion of the electrode group into the shell and improve the assembly efficiency.

[0053] In some embodiments of the present invention, Figure 2-Figure 5 As shown, a negative pole column 3131 is provided on the negative cover plate 313, and an explosion-proof valve 3121 is provided on the positive cover plate 312. When multiple explosion-proof valves 3121 are located on both sides of the module 3 along the second direction, the positive pole cover plate 312 of one of any two adjacent battery cells 31 and the negative pole cover plate 313 of the other battery cell 31 are located on the same side of the module 3 along the second direction. The module 3 also includes a bus 34. There are multiple bus bars 34, and the multiple bus bars 34 are located on both sides of the module 3 along the second direction. The bus bar 34 is used to connect the negative pole column 3131 and the positive pole cover plate 312 of any two adjacent battery cells 31.

[0054] Thus, the negative poles 3131 and the positive cover plates 312 of any two adjacent cells 31 are connected by the busbar 34, so that a plurality of cells 31 are connected in series, and the positive cover plates 312 and the busbar 34 are directly connected, and there is no need to set the positive poles 3122 on the positive cover plates 312, thereby reducing the overall weight of the module 3. At the same time, the negative poles 3131 are set on the negative cover plates 313, and the explosion-proof valves 3121 are set on the positive cover plates 312, so that the layout of the cells 31 is more reasonable, and the volume of the cells 31 is further reduced. In addition, when the plurality of explosion-proof valves 3121 are located on both sides of the module 3 along the second direction, the plurality of busbars 34 are located on both sides of the module 3 along the second direction, so that the busbar 34 can connect the negative poles 3131 and the positive cover plates 312 of any two adjacent cells 31, so that the layout of the module 3 is more reasonable, and the height of the module 3 along the up and down direction is shortened, thereby reducing the overall size of the battery pack 100.

[0055] In some embodiments of the present invention, Figure 2-Figure 5 As shown, the busbar 34 is spaced apart from the explosion-proof valve 3121 in the vertical direction. Thus, such an arrangement further rationalizes the layout of the module 3, further shortens the volume of the module 3, and thus reduces the overall size of the battery pack 100.

[0056] Furthermore, the multiple busbars 34 located on both sides of the second direction of the module 3 are all located at the same height, and the multiple explosion-proof valves 3121 located on both sides of the second direction of the module 3 are all located at the same height. Thus, by having the multiple explosion-proof valves 3121 located at the same height, the lowest point of the upper surface of the beam structure 2 can be higher than the highest point of any explosion-proof valve 3121 without the need for complex bending or tilting of the beam structure 2, thereby simplifying the layout and structure of the beam structure 2 and reducing costs. At the same time, such a setting facilitates the subsequent maintenance of the module 3.

[0057] In some embodiments of the present invention, Figure 6-Figure 9 As shown, a positive electrode column 3122 is provided on the positive electrode cover 312, and the bus 34 is used to connect the negative electrode column 3131 and the positive electrode column 3122 of any two adjacent battery cells 31. Thus, the negative electrode column 3131 and the positive electrode column 3122 of any two adjacent battery cells 31 are connected through the bus 34 to achieve the series connection of multiple battery cells 31. At the same time, compared with the direct connection between the bus 34 and the positive electrode cover 312, the connection between the bus 34 and the positive electrode column 3122 can effectively reduce the influence of the welding connection on the insulating film outside the shell 311, and reduce the influence of the welding connection on the first insulating member 314 located on the positive electrode cover 312, further improving the reliability of the battery pack 100.

[0058] In some embodiments of the present invention, Figure 10-13As shown, a negative pole column 3131 is provided on the negative cover plate 313, and an explosion-proof valve 3121 is provided on the positive cover plate 312. When multiple explosion-proof valves 3121 are located on the same side of the module 3 along the second direction, the negative pole cover plates 313 of all battery cells 31 are located on the same side of the module 3 along the second direction, and any two adjacent negative pole cover plates 313 are spaced apart along the first direction. The module 3 also includes a bus 34. There are multiple bus bars 34. The multiple bus bars 34 are all located on the side of the battery cell 31 close to the negative pole cover plate 313 along the second direction. The multiple explosion-proof valves 3121 are located on the side of the battery cell 31 close to the positive pole cover plate 312 along the second direction. The bus bar 34 is used to connect the negative pole column 3131 of one of any two adjacent battery cells 31 with the negative pole cover plate 313 of the other battery cell 31.

[0059] Thus, the negative pole 3131 of one of any two adjacent cells 31 is connected to the negative cover 313 of the other cell 31 through the busbar 34, so that a plurality of cells 31 are connected in series, and the positive cover 312 is directly connected to the busbar 34, without the need to provide a positive pole 3122 on the positive cover 312, thereby reducing the overall weight of the module 3. At the same time, by having a plurality of busbars 34 located on the side of the cell 31 close to the negative cover 313 along the second direction, the length of the cell 31 along the second direction is effectively shortened, the volume of the cell 31 is further reduced, and the installation and maintenance of the battery pack 100 are facilitated. In addition, by providing a negative pole 3131 on the negative cover 313 and an explosion-proof valve 3121 on the positive cover 312, the layout of the cell 31 is made more reasonable, and the volume of the cell 31 is further reduced.

[0060] Furthermore, when there are two modules 3 of the battery pack 100 along the second direction, by arranging multiple explosion-proof valves 3121 on the side of the two modules 3 facing away from each other, it is possible to avoid the heat and other substances ejected during the pressure relief and exhaust process of the explosion-proof valve 3121 of one of the modules 3 from affecting the other module 3, thereby avoiding the occurrence of heat spread leading to explosion or fire, etc., and improving the safety of the battery pack 100.

[0061] In some embodiments of the present invention, Figure 14-17As shown, a positive pole 3122 is also provided on the negative electrode cover 313, and the bus 34 is used to connect the negative pole 3131 and the positive pole 3122 of any two adjacent battery cells 31. Thus, the negative pole 3131 and the positive pole 3122 of any two adjacent battery cells 31 are connected through the bus 34 to achieve the series connection of multiple battery cells 31. At the same time, compared with the direct connection between the bus 34 and the positive electrode cover 312, the connection between the bus 34 and the positive pole 3122 can effectively reduce the influence of the welding connection on the insulating film outside the shell 311, and reduce the influence of the welding connection on the first insulating member 314 located on the positive electrode cover 312, further improving the reliability of the battery pack 100.

[0062] In some embodiments of the present invention, Figure 2-Figure 17 As shown, the battery cell 31 further includes a first insulating member 314 and a second insulating member 315. The first insulating member 314 is connected to the positive electrode cover plate 312 and is located on the side of the positive electrode cover plate 312 away from the negative electrode cover plate 313, and the second insulating member 315 is connected to the negative electrode cover plate 313 and is located on the side of the negative electrode cover plate 313 away from the positive electrode cover plate 312. Thus, the insulation of the battery cell 31 is ensured by the first insulating member 314 and the second insulating member 315, thereby improving the safety of the module 3 and the battery pack 100.

[0063] In some embodiments of the present invention, Figure 2-Figure 9 As shown, a negative pole column 3131 is provided on the negative cover plate 313, and an explosion-proof valve 3121 is provided on the positive cover plate 312. When multiple explosion-proof valves 3121 are located on both sides of the module 3 along the second direction, the first insulating member 314 is provided with an explosion-proof hole 3141 for the explosion-proof valve 3121 to pass through and a first through hole 3142 for connecting the bus 34 with the positive cover plate 312. The negative cover plate 313 is provided with a second through hole 3151 for the negative pole column 3131 to pass through, so that the bus 34 connects the negative pole column 3131 and the positive cover plate 312 of any two adjacent battery cells 31.

[0064] Furthermore, a positive pole post 3122 is provided on the positive pole cover plate 312 , and a first through hole 3142 is formed through the positive pole post 3122 , so that the bus bar 34 connects the negative pole post 3131 and the positive pole post 3122 of any two adjacent battery cells 31 .

[0065] In some embodiments of the present invention, Figure 10-Figure 17As shown, a negative pole column 3131 is provided on the negative pole cover plate 313, and an explosion-proof valve 3121 is provided on the positive pole cover plate 312. When multiple explosion-proof valves 3121 are located on the same side of the module 3 along the second direction, the first insulating member 314 is provided with an explosion-proof hole 3141 for the explosion-proof valve 3121 to pass through, and the negative pole cover plate 313 is provided with a third through hole 3152, so that the bus 34 connects the negative pole column 3131 of one of any two adjacent battery cells 31 with the negative pole cover plate 313 of the other battery cell 31.

[0066] Furthermore, a positive electrode column 3122 is provided on the negative electrode cover plate 313, and a third through hole 3152 is passed through the negative electrode column 3131, so that the bus 34 connects the negative electrode column 3131 and the positive electrode column 3122 of any two adjacent battery cells 31.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0068] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: case; A beam structure, wherein the beam structure is disposed in the housing; A module, wherein the module is arranged in the shell, the module comprises a plurality of battery cells stacked along a first direction, each of the battery cells comprises an explosion-proof valve, the plurality of explosion-proof valves are located on the same side or both sides of the module along a second direction, along the second direction, the beam structure and the explosion-proof valve are arranged opposite to and spaced apart from each other, along the up-down direction, the lowest point of the upper surface of the beam structure is higher than the highest point of the explosion-proof valve, and the first direction, the second direction and the up-down direction are perpendicular to each other.

2. The battery pack according to claim 1, characterized in that: The beam structure includes a first beam and a second beam connected to each other, the first beam extends along the first direction, and the second beam extends along the second direction. The first beam and the second beam divide the cavity in the shell into a plurality of sub-cavities. The number of the modules corresponds to the number of the sub-cavities one by one, and one module is provided in each sub-cavity.

3. The battery pack according to claim 1, characterized in that: When the plurality of explosion-proof valves are located on both sides of the module along the second direction, the plurality of explosion-proof valves are located at the same height along the up-down direction.

4. The battery pack according to claim 1, characterized in that: The battery cell also includes: A shell, wherein both ends of the shell along the second direction are open to form an open opening, and a pole group is arranged in the shell; A positive electrode cover plate, the positive electrode cover plate blocks one of the openings and is connected to the housing, and the positive electrode ear of the electrode group is connected to the positive electrode cover plate; A negative electrode cover plate, the negative electrode cover plate blocks the other open port and is connected to the shell, the negative electrode ear of the electrode group is connected to the negative electrode cover plate, and the positive electrode cover plate or the positive electrode cover plate is provided with the explosion-proof valve.

5. The battery pack according to claim 4, characterized in that: The negative electrode cover is provided with a negative electrode column, the positive electrode cover is provided with the explosion-proof valve, and when a plurality of the explosion-proof valves are located on both sides of the module along the second direction, the positive electrode cover of one of any two adjacent battery cells and the negative electrode cover of the other battery cell are located on the same side of the module along the second direction, and the module further includes: A busbar, wherein there are multiple busbars, and the multiple busbars are located on both sides of the module along the second direction, and the busbar is used to connect the negative electrode poles and the positive electrode cover plates of any two adjacent battery cells.

6. The battery pack according to claim 5, characterized in that: The bus bar is spaced apart from the explosion-proof valve along the up-down direction.

7. The battery pack according to claim 5, characterized in that: The positive electrode cover plate is provided with a positive electrode column, and the bus bar is used to connect the negative electrode column and the positive electrode column of any two adjacent battery cells.

8. The battery pack according to claim 4, characterized in that: The negative electrode cover plate is provided with a negative electrode column, the positive electrode cover plate is provided with the explosion-proof valve, when a plurality of the explosion-proof valves are located on the same side of the module along the second direction, the negative electrode cover plates of all the battery cells are located on the same side of the module along the second direction, and any two adjacent negative electrode cover plates are spaced apart along the first direction, and the module further comprises: A bus, wherein there are multiple busbars, and the multiple busbars are all located on the side of the battery cell close to the negative electrode cover along the second direction, and the multiple explosion-proof valves are located on the side of the battery cell close to the positive electrode cover along the second direction, and the busbar is used to connect the negative electrode column of one of the battery cells and the negative electrode cover of the other battery cell of any two adjacent battery cells.

9. The battery pack according to claim 8, characterized in that: The negative electrode cover plate is also provided with a positive electrode column, and the busbar is used to connect the negative electrode column and the positive electrode column of any two adjacent battery cells.

10. The battery pack according to claim 4, characterized in that: The battery cell also includes: a first insulating member, the first insulating member being connected to the positive electrode cover plate and being located on a side of the positive electrode cover plate facing away from the negative electrode cover plate; A second insulating member is connected to the negative electrode cover plate and is located on a side of the negative electrode cover plate facing away from the positive electrode cover plate.

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