Battery pack and electric device

Abstract

The utility model relates to the technical field of battery packs, and discloses a battery pack and an electric device, the battery pack comprises a box body and a battery module; the box body is internally provided with at least one battery bin, the battery module is accommodated in the battery bin, the battery module comprises at least one battery row, the battery row comprises two insulating end plates and a plurality of battery cell monomers, the two insulating end plates are both provided with concave clamping jaw placing grooves, and the battery cell monomers are arranged in the clamping jaw placing grooves. The side edge of the clamping jaw containing groove is provided with a protruding structure, and the bottom of each protruding structure is provided with a box entering chamfer angle. After the battery modules are placed in the corresponding battery cabins, the outer surfaces of the convex structures on the two insulating end plates in each battery column are propped against the box body under the acting force of outward expansion of the single battery cells; the technical problem of how to independently take out the battery module to facilitate subsequent maintenance and improve the integration level of the battery pack in the prior art is mainly solved.

Description

Technical Field

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

[0002] With the rapid development of the new energy industry, the demand for battery packs is increasing. A battery pack mainly includes a box body and battery modules accommodated in the box body. In order to pursue high integration and large energy density, traditional battery packs usually directly squeeze battery modules composed of multiple battery cell monomers into the battery compartments of the box body. In this way, it is difficult to take out the battery cell monomers subsequently, which is not convenient for subsequent maintenance work, and further leads to the problem of high cost during the maintenance of the battery pack. In order to facilitate the subsequent maintenance of the battery module alone, some current battery packs are designed such that the battery module includes two insulating end plates and multiple battery cell monomers located between the two insulating end plates, and the two insulating end plates are designed to be fixed on the box body by means of fasteners. Although the battery pack with this structure can take out the battery module alone, it has the disadvantage of low integration. In summary, how to be able to take out the battery module alone while also being beneficial to improving the integration of the battery pack is a technical problem that needs to be solved in the current field. Therefore, it is necessary to improve the existing battery packs. Summary of the Utility Model

[0003] The utility model provides a battery pack and an electric device, mainly solving the technical problem in the prior art of how to be able to take out the battery module alone for subsequent maintenance while also being beneficial to improving the integration of the battery pack.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A battery pack includes a box body and at least one battery module;

[0006] At least one battery compartment is provided in the box body, the battery module is accommodated in the battery compartment along a first direction X, the battery module includes at least one row of battery rows, each battery row includes two insulating end plates and multiple battery cell monomers arranged between the two insulating end plates. On one side of the two insulating end plates facing away from the battery cell monomers, a plurality of claw placement grooves are arranged at intervals along a second direction Y and are recessed, so that a raised structure is formed on the side of the claw placement groove, and an in-box reverse angle is provided at the bottom of each raised structure;

[0007] After the battery module is placed in a corresponding battery compartment, the outer surfaces of the raised structures on the two insulating end plates in each battery row are in contact with the box body under the action of the force of the battery cell monomers expanding along the first direction X.

[0008] In one of the technical solutions, on both sides of the insulating end plate along the second direction Y, first limiting pieces extend towards the single battery cell. On one side of the insulating end plate along the third direction Z, away from the inner bottom surface of the box body 1, a second limiting piece extends. The second limiting piece and the two first limiting pieces jointly enclose a limiting space, and the outermost single battery cell in the battery row is limited within the limiting space.

[0009] In one of the technical solutions, at the side position of the insulating end plate along the second direction Y, an avoidance angle extending vertically along the third direction Z and used to avoid the weld in the box body is provided.

[0010] In one of the technical solutions, a plurality of weight-reducing holes are provided in the convex structure, so that a plurality of reinforcing rib structures are formed inside the convex structure.

[0011] In one of the technical solutions, the battery module includes at least two rows of the battery rows arranged in sequence along the second direction Y. Insulating partitions are provided between adjacent two rows of the battery rows, and each of the insulating partitions is adhesively connected to the adjacent two rows of the battery rows.

[0012] In one of the technical solutions, the box body includes a frame, a front limiting beam, a middle limiting beam, and a rear limiting beam that are all connected within the frame;

[0013] The front limiting beam, the middle limiting beam, and the rear limiting beam are arranged at intervals in sequence along the first direction X. At least one first battery compartment is provided between the front limiting beam and the middle limiting beam, and at least one second battery compartment is also provided between the middle limiting beam and the rear limiting beam. The battery module is accommodated in both the first battery compartment and the second battery compartment;

[0014] In the first battery compartment, one insulating end plate in the battery row abuts against the front limiting beam, and the other insulating end plate in the battery row abuts against the middle limiting beam;

[0015] In the second battery compartment, one insulating end plate in the battery row abuts against the middle limiting beam, and the other insulating end plate in the battery row abuts against the rear limiting beam.

[0016] In one of the technical solutions, the box body further includes longitudinal beams respectively connected to the front limiting beam, the middle limiting beam and the rear limiting beam. The longitudinal beams divide the area between the front limiting beam and the middle limiting beam into two first battery compartments arranged in sequence along the second direction Y, and the longitudinal beams also divide the area between the middle limiting beam and the rear limiting beam into two second battery compartments arranged in sequence along the second direction Y. The battery modules are accommodated in both the two first battery compartments and the two second battery compartments.

[0017] In one of the technical solutions, a reinforcing structure extends along the first direction X at the bottom of the side of the front limiting beam facing away from the battery module.

[0018] In one of the technical solutions, the frame includes a rear side beam adjacent to the rear limiting beam. The rear side beam includes a rear beam main body and a convex beam connected to the bottom of the rear beam main body and protruding toward the rear limiting beam. The rear limiting beam is arranged on the upper end surface of the convex beam along the third direction Z and connected to the rear beam main body;

[0019] The battery pack further includes a liquid-cooled bottom plate and a bottom guard plate. The liquid-cooled bottom plate is connected to the side of the frame facing the battery module along the third direction Z to exchange heat with the bottom of the battery module, and the liquid-cooled bottom plate is also clamped to the bottom of the convex beam. The bottom guard plate is connected to the bottom of the frame along the third direction Z and covers the liquid-cooled bottom plate.

[0020] An electric device includes the battery pack described in any one of the above.

[0021] Compared with the prior art, the battery pack provided by the present utility model has at least the following beneficial effects:

[0022] The battery module of this solution adopts a structural design including two insulating end plates and a plurality of battery cell monomers located between the two insulating end plates. Moreover, in this solution, a jaw placement groove and an in-box guiding angle at the bottom are provided on the side of the two insulating end plates facing away from the battery cell monomers, so that the battery module of this solution can be reliably squeezed into the battery compartment of the box body by being clamped by an external jaw and guided by the in-box guiding angle, enabling more battery cell monomers to be provided in each battery compartment with limited space. This is conducive to improving the integration of the battery pack, and further conducive to improving the energy density of the battery pack. At the same time, in this solution, the entire battery module can be taken outwards by extending an external jaw into the jaw placement groove on the battery module and appropriately compressing the battery module, which is conducive to the subsequent maintenance of the battery module and improves the efficiency of the subsequent maintenance work of the battery pack. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 Structural schematic diagram of a battery pack provided by an embodiment of the present application;

[0025] Figure 2 Structural schematic diagram of a battery module provided by an embodiment of the present application;

[0026] Figure 3 Structural schematic diagram of an insulating end plate provided by an embodiment of the present application;

[0027] Figure 4 For Figure 3 Structural schematic diagram of the insulating end plate shown in another angle;

[0028] Figure 5 Structural schematic diagram of a box body provided by an embodiment of the present application;

[0029] Figure 6 For Figure 1 Top view of the battery pack shown;

[0030] Figure 7 For Figure 6 Cross-sectional view taken at A-A in

[0031] Figure 8 For Figure 7 Partial enlarged view at B in

[0032] Figure 9 For Figure 7 Partial enlarged view at C in

[0033] Figure 10 For Figure 7 Partial enlarged view at D in

[0034] Reference numerals:

[0035] 1. Box body; 10. Battery compartment; 101. First battery compartment; 102. Second battery compartment; 11. Frame; 111. Rear side beam; 1111. Rear beam main body; 1112. Convex beam; 12. Front limit beam; 121. Reinforcement structure; 13. Middle limit beam; 14. Rear limit beam; 15. Longitudinal beam;

[0036] 2. Battery module; 21. Battery column; 211. Insulating end plate; 2111. Jaw placement groove; 2112. Protrusion structure; 2113. In-box guiding angle; 2114. First limiting piece; 2115. Second limiting piece; 2116. Limiting space; 2117. Avoidance angle; 2118. Weight reduction hole; 2119. Reinforcing rib structure; 212. Single battery cell; 22. Insulating partition board;

[0037] 3. Liquid cooling bottom plate; 4. Bottom protection plate. Detailed implementation manners

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further elaborates on this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0039] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application 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 should not be construed as a limitation to this application.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined.

[0042] In order to make the purpose, technical solution and advantages of this utility model clearer, the following further elaborates on this utility model in conjunction with the accompanying drawings and embodiments.

[0043] Please refer to Figures 1 to 3 and Figure 5, an embodiment of the present utility model provides a battery pack, which mainly includes a box body 1 and at least one battery module 2. Among them, at least one battery compartment 10 is arranged in the box body 1, and the battery module 2 is accommodated in the battery compartment 10 along the first direction X. Among them, the battery module 2 includes at least one column of battery cells 21, and each battery cell column 21 includes two insulating end plates 211 and a plurality of battery cell monomers 212. The plurality of battery cell monomers 212 are arranged between the two insulating end plates 211. Among them, a plurality of claw placement grooves 2111 which are recessed and arranged at intervals along the second direction Y are arranged on one side of the two insulating end plates 211 facing away from the battery cell monomers 212, so that a convex convex structure 2112 is formed on the side of the claw placement groove 2111. In addition, an in-box guiding angle 2113 is arranged at the bottom of each convex structure 2112.

[0044] Specifically, when the battery module 2 of this embodiment needs to be installed into the box body 1, an external claw can be used to extend into the claw placement groove 2111 and clamp the entire battery module 2. Then, the battery module 2 is reliably pressed downward into the battery compartment 10 of the box body 1 through the guiding of the in-box guiding angle 2113 at the bottom, so that there can be more battery cell monomers 212 in each battery compartment 10 with limited space, which is beneficial to improving the integration of the battery pack, and further beneficial to improving the energy density of the battery pack. In fact, after the battery module 2 is installed into the battery compartment 10 of the box body 1, the outer surfaces of the convex structures 2112 on the two insulating end plates 211 in each battery cell column 21 are in contact with the box body 1 under the action of the outward expansion force of the battery cell monomers 212. At this time, the battery module 2 can be reliably fixed in the box body 1 without fasteners. When the battery module 2 needs to be taken out, this solution can extend an external claw into the claw placement groove 2111 on the battery module 2 and take out the entire battery module 2 outward by appropriately compressing the battery module 2, which is beneficial to the subsequent maintenance of the battery module 2 and improves the efficiency of the subsequent maintenance work of the battery pack.

[0045] In this embodiment, before the battery row 21 is installed in the box body 1, preferably, the adjacent battery cells 212 inside are adhesively bonded to each other in sequence, and the two insulating end plates 211 are also adhesively bonded to one adjacent battery cell 212 respectively, so that a plurality of battery cells 212 and the two insulating end plates 211 together form a non-loose battery row 21, improving the reliability that the battery row 21 can be integrally installed in the box body 1 or integrally taken outwards. Specifically, an insulating end plate 211 with double-sided tape can be fixed at the reference position first, and then a plurality of (for example, 4) battery cells 212 with double-sided tape are taken. The plurality of battery cells 212 with double-sided tape are pushed to move towards the insulating end plate 211 at the reference position, so that the plurality of battery cells 212 are adhesively bonded to each other under the clamping force and the insulating end plate 211 at the reference position is also adhesively bonded to one battery cell 212 at the end. Then, a plurality of battery cells 212 with double-sided tape are taken again and the above operation is repeated. Finally, the other insulating end plate 211 is adhesively bonded to one battery cell 212 at the other end, thus completing the stacking and assembly of the battery row 21.

[0046] Please refer to Figure 2 , the battery module 2 of this embodiment preferably includes at least two rows of battery rows 21 arranged in sequence along the second direction Y. Insulating partitions 22 are provided between two adjacent battery rows 21. Each insulating partition 22 is adhesively bonded to the two adjacent battery rows 21, so that a plurality of battery rows 21 together form a non-loose battery module 2, improving the reliability that the battery module 2 can be integrally installed in the box body 1 or integrally taken outwards.

[0047] Please also refer to Figures 2 to 4 , first limiting pieces 2114 extend towards the battery cells 212 on both sides of the insulating end plate 211 along the second direction Y. The distance between the two first limiting pieces 2114 is adapted to the width dimension of the battery cell 212. A second limiting piece 2115 extends from the side of the insulating end plate 211 facing away from the ground inside the box body 1 along the third direction Z (i.e., the top of the insulating end plate 211). The second limiting piece 2115 and the two first limiting pieces 2114 together enclose a limiting space 2116. The outermost battery cell 212 in the battery row 21 is limited in this limiting space 2116. That is, the two first limiting pieces 2114 are respectively arranged on both sides of one battery cell 212 at the end in the width direction, and the second limiting piece 2115 is located at the top of one battery cell 212 at the end. Through such a design, the problem of the position offset of the insulating end plate 211 relative to the battery cell 212 can be solved, thereby improving the position accuracy of the adhesive bonding between the insulating end plate 211 and the battery cell 212.

[0048] Please refer to Figure 3, an avoidance angle 2117 extending along the third direction Z is provided at the side position of the insulating end plate 211 along the second direction Y. This avoidance angle 2117 is used to avoid the weld seam in the box body 1 to ensure that the battery module 2 can be reliably installed in the battery compartment 10. In addition, a weight reduction hole 2118 is provided in the protruding structure 2112 of the insulating end plate 211, so that a plurality of reinforcing rib structures 2119 are formed inside the protruding structure 2112. Thus, while ensuring that the insulating end plate 211 has better rigidity and strength, the weight of the insulating end plate 211 is also reduced, which is beneficial to further improving the energy density of the battery pack.

[0049] Please refer to Figures 5 to 10 , the box body 1 specifically includes a frame 11, a front limiting beam 12, a middle limiting beam 13, and a rear limiting beam 14 that are all connected inside the frame 11. The front limiting beam 12, the middle limiting beam 13, and the rear limiting beam 14 are arranged at intervals along the first direction X in sequence. At least one first battery compartment 101 is provided between the front limiting beam 12 and the middle limiting beam 13, and at least one second battery compartment 102 is also provided between the middle limiting beam 13 and the rear limiting beam 14. The battery modules 2 are accommodated in both the first battery compartment 101 and the second battery compartment 102. Specifically, in each first battery compartment 101, one of the insulating end plates 211 in the battery row 21 abuts against the front limiting beam 12, and the other insulating end plate 211 in the battery row 21 abuts against the middle limiting beam 13. In each second battery compartment 102, one of the insulating end plates 211 in the battery row 21 abuts against the middle limiting beam 13, and the other insulating end plate 211 in the battery row 21 abuts against the rear limiting beam 14. By providing the front limiting beam 12, the middle limiting beam 13, and the rear limiting beam 14, not only can the structural strength of the box body 1 be improved, but also it is beneficial to form a plurality of battery compartments 10, and each limiting beam can be used to abut against the battery module 2, which is beneficial to improving the stability of the battery module 2 in the box body 1.

[0050] Please refer to again Figures 5 to 10 , the box body 1 further includes a longitudinal beam 15. The longitudinal beam 15 is welded to the front limiting beam 12, the middle limiting beam 13, and the rear limiting beam 14 respectively. The longitudinal beam 15 can further improve the structural strength of the box body 1. In addition, the longitudinal beam 15 divides the area between the front limiting beam 12 and the middle limiting beam 13 into two first battery compartments 101 arranged in sequence along the second direction Y. The longitudinal beam 15 also divides the area between the middle limiting beam 13 and the rear limiting beam 14 into two second battery compartments 102 arranged in sequence along the second direction Y. The battery modules 2 are accommodated in both the two first battery compartments 101 and the two second battery compartments 102. That is, this embodiment preferably includes four battery compartments 10 and correspondingly has four battery modules 2. All the battery cell monomers 212 can be Figure 6 connected in series in sequence in the direction indicated by the thick line arrow in

[0051] Please refer to Figure 7 and Figure 8 as well. At the bottom of the side of the front limiting beam 12 facing away from the battery module 2, a strengthening structure 121 extends along the first direction X. This strengthening structure 121 can improve the structural strength of the front limiting beam 12, ensure that the front limiting beam 12 can reliably suppress the expansion of the battery module 2 at the end of the cycle, reduce the risk of the front limiting beam 12 being pushed outwards by the battery module 2, and ensure that the battery module 2 can be firmly fixed in the battery compartment 10 throughout its life cycle.

[0052] Please refer to Figure 7 and Figure 10 as well. The frame 11 includes a rear side beam 111 arranged adjacent to the rear limiting beam 14. The rear side beam 111 includes a rear beam main body 1111 and a convex beam 1112 connected to the bottom of the rear beam main body 1111 and protruding towards the side of the rear limiting beam 14 (i.e., inwards). The battery pack further includes a liquid-cooled bottom plate 3 and a bottom guard plate 4. The liquid-cooled bottom plate 3 is connected to the side of the frame 11 facing the battery module 2 along the third direction Z and is used for heat exchange with the bottom of the battery module 2. Specifically, the liquid-cooled bottom plate 3 is clamped to the bottom of the convex beam 1112. The bottom guard plate 4 is connected to the bottom of the frame 11 along the third direction Z and covers the liquid-cooled bottom plate 3. In fact, the bottom guard plate 4 is connected to the bottom of the rear beam main body 1111. The bottom guard plate 4 plays a role in protecting the liquid-cooled bottom plate 3 and preventing the phenomenon of coolant leakage caused by the liquid-cooled bottom plate 3 being directly impacted externally. The rear limiting beam 14 is arranged on the top of the convex beam 1112 and connected to the rear beam main body 1111. The connection method between the rear limiting beam 14 and the rear beam main body 1111 can be welding, bolt connection, riveting or adhesive bonding. The rear limiting beam 14 can also be welded to the top of the convex beam 1112 to improve the connection strength between the rear limiting beam 14 and the rear side beam 111. By designing the combined structure of the rear limiting beam 14 and the rear side beam 111, while improving the integration of the battery pack, the reliability of suppressing the outward expansion of the battery module 2 can be further improved. At the same time, the structural strength of the box body 1 is also improved to reduce the risk of deformation of the box body 1 due to external force collision. At the same time, the distance between the battery module 2 and the outside is also increased to isolate external heat damage, which is beneficial to improving the life of the internal battery module 2.

[0053] This embodiment also provides an electrical device, which includes the above-mentioned battery pack. Therefore, this electrical device also has advantages such as high battery integration, large energy density, and easy installation and disassembly of the battery module 2.

[0054] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A battery pack, characterized in that: Comprising a box body (1) and at least one battery module (2); At least one battery compartment (10) is arranged in the box body (1), the battery module (2) is accommodated in the battery compartment (10) along a first direction (X), the battery module (2) comprises at least one battery column (21), the battery column (21) comprises two insulating end plates (211) and a plurality of battery cells (212) arranged between the two insulating end plates (211), the two insulating end plates (211) are provided with a plurality of recessed clamping jaw placement grooves (2111) arranged at intervals along a second direction (Y) on a side facing away from the battery cells (212), so that the side edges of the clamping jaw placement grooves (2111) form a raised protruding structure (2112), and the bottom of each of the protruding structures (2112) is provided with a box entry chamfer angle (2113); When the battery module (2) is placed in the battery compartment (10), the outer surfaces of the protruding structures (2112) on the two insulating end plates (211) in each battery row (21) are subjected to the force of the battery cell (212) expanding along the first direction (X) and are in contact with the box body (1).

2. The battery pack according to claim 1, characterized in that: The insulating end plate (211) has first limiting plates (2114) extending from both sides along the second direction (Y) toward the battery cell (212), and the insulating end plate (211) has second limiting plates (2115) extending from one side of the insulating end plate (211) facing away from the inner bottom surface of the box body (1) along the third direction (Z). The second limiting plates (2115) and the two first limiting plates (2114) are jointly arranged to form a limiting space (2116), and the battery cell (212) located at the outermost side in the battery column (21) is limited in the limiting space (2116).

3. The battery pack according to claim 2, characterized in that: The insulating end plate (211) is provided with a side position along the second direction (Y) with an avoidance angle (2117) extending along the third direction (Z), and the avoidance angle (2117) is used to avoid a weld in the box body (1).

4. The battery pack according to claim 1, wherein: A plurality of weight-reducing holes (2118) are provided in the protruding structure (2112), so that a plurality of reinforcing rib structures (2119) are formed inside the protruding structure (2112).

5. The battery pack according to any one of claims 1 to 4, characterized in that: The battery module (2) comprises at least two rows of battery columns (21) arranged in sequence along the second direction (Y), an insulating partition (22) being provided between two adjacent rows of battery columns (21), and each insulating partition (22) being bonded to two adjacent rows of battery columns (21).

6. The battery pack according to any one of claims 1 to 4, characterized in that: The box body (1) comprises a frame (11) and a front limiting beam (12), a middle limiting beam (13) and a rear limiting beam (14) which are all connected to the frame (11); The front limiting beam (12), the middle limiting beam (13) and the rear limiting beam (14) are arranged in sequence and spaced apart along the first direction (X); at least one first battery compartment (101) is provided between the front limiting beam (12) and the middle limiting beam (13); at least one second battery compartment (102) is provided between the middle limiting beam (13) and the rear limiting beam (14); the battery module (2) is accommodated in both the first battery compartment (101) and the second battery compartment (102); In the first battery compartment (101), one of the insulating end plates (211) in the battery row (21) abuts against the front limit beam (12), and another insulating end plate (211) in the battery row (21) abuts against the middle limit beam (13); In the second battery compartment (102), one of the insulating end plates (211) in the battery row (21) abuts against the middle limit beam (13), and another insulating end plate (211) in the battery row (21) abuts against the rear limit beam (14).

7. The battery pack according to claim 6, characterized in that: The box body (1) further comprises a longitudinal beam (15) respectively connected to the front limiting beam (12), the middle limiting beam (13) and the rear limiting beam (14); the longitudinal beam (15) divides the area between the front limiting beam (12) and the middle limiting beam (13) into two first battery compartments (101) arranged in sequence along a second direction (Y); and the longitudinal beam (15) further divides the area between the middle limiting beam (13) and the rear limiting beam (14) into two second battery compartments (102) arranged in sequence along the second direction (Y); the battery modules (2) are both accommodated in the two first battery compartments (101) and the two second battery compartments (102).

8. The battery pack according to claim 6, wherein: A reinforcement structure (121) is provided at the bottom of the side of the front limiting beam (12) facing away from the battery module (2) and extending along the first direction (X).

9. The battery pack according to claim 6, characterized in that: The frame (11) comprises a rear side beam (111) arranged adjacent to the rear limiting beam (14); the rear side beam (111) comprises a rear beam body (1111) and a convex beam (1112) connected to the bottom of the rear beam body (1111) and protruding toward one side of the rear limiting beam (14); the rear limiting beam (14) is arranged on the upper end surface of the convex beam (1112) along a third direction (Z) and is connected to the rear beam body (1111); The battery pack further comprises a liquid cooling bottom plate (3) and a bottom protection plate (4); the liquid cooling bottom plate (3) is connected to a side of the frame (11) facing the battery module (2) along a third direction (Z) to exchange heat with the bottom of the battery module (2); the liquid cooling bottom plate (3) is also clamped to the bottom of the convex beam (1112); and the bottom protection plate (4) is connected to the bottom of the frame (11) along the third direction (Z) and covers the liquid cooling bottom plate (3).

10. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 9.

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