Battery pack and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and a power utilization device, and the battery pack comprises a cover plate, a frame and a bottom plate assembly. The bottom plate assembly comprises a bottom protection plate, an elastic supporting piece and a liquid cooling plate which are arranged in the third direction, and the bottom protection plate and the liquid cooling plate are both connected with the frame. The number of the first supporting sections and the number of the second supporting sections of the elastic supporting pieces are both multiple, the first supporting sections and the second supporting sections are alternately arranged in the second direction, the adjacent first supporting sections and second supporting sections are connected, the first supporting sections are connected with the bottom protection plate, and the second supporting sections protrude towards the liquid cooling plate in the third direction and are connected with the liquid cooling plate; the first reinforcing protrusions are arranged between the adjacent first supporting sections and the second supporting sections, and the two ends, in the second direction, of the first reinforcing protrusions are connected with the first supporting sections and the second supporting sections correspondingly. The supporting strength of the elastic piece can be improved, and the situation of supporting failure is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and an electric device. BACKGROUND

[0002] The spring sheet in the battery pack is an important component inside the battery pack. They are usually arranged between the liquid cooling plate and the bottom plate, which can firmly fix the liquid cooling plate on the bottom plate, ensuring that the liquid cooling plate will not loosen or shift due to vibration or impact during vehicle driving or various working conditions. This fixing effect helps to maintain the stability and reliability of the internal structure of the battery pack, preventing uneven heat dissipation or damage caused by the movement of the liquid cooling plate.

[0003] At the same time, the spring sheet has a certain elasticity, which can absorb and disperse the energy generated by the battery pack when subjected to external impact or vibration. In this way, the spring sheet can reduce the stress of the battery core on the bumpy road and reduce the risk of damage to the battery core, thereby improving the safety and reliability of the battery. During the charging and discharging process of the battery, the battery core may expand slightly due to internal chemical reactions. The design of the spring sheet can adapt to such expansion to prevent the battery core from being subjected to excessive pressure or damage due to expansion.

[0004] However, the spring sheet in the prior art, when subjected to pressure from top to bottom, if the pressure is too large, the arch-shaped structure will be flattened around, causing the support effect to fail. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a battery pack and an electric device to solve the problem that if the spring sheet is subjected to too much pressure, the arch-shaped structure will be flattened around, causing the support effect to fail.

[0006] In a first aspect, the present application provides a battery pack having a first direction, a second direction and a third direction intersecting with each other, the battery pack comprising a cover plate, a frame and a bottom plate assembly. The frame is provided with openings at both ends along the third direction, and the cover plate and the bottom plate assembly respectively close the two openings.

[0007] The bottom plate assembly comprises a bottom guard plate, an elastic support and a liquid cooling plate arranged along the third direction, and the bottom guard plate and the liquid cooling plate are connected with the frame.

[0008] The elastic support comprises a first support section and a second support section, a plurality of the first support sections and a plurality of the second support sections are provided, the first support sections and the second support sections are alternately arranged along the second direction, adjacent first support sections and second support sections are connected, the first support sections are connected with the bottom guard plate, and the second support sections are protruded towards the liquid cooling plate along the third direction and connected with the liquid cooling plate; a first reinforcing protrusion is arranged between adjacent first support sections and second support sections, and the two ends of the first reinforcing protrusion along the second direction are connected with the first support section and the second support section respectively.

[0009] Beneficial effects: The first support section and the second support section are arranged on the elastic support, and the second support section is arranged in an arched structure, which not only effectively fixes the liquid cooling plate and prevents displacement of the liquid cooling plate in motion or vibration, but also significantly improves the shock resistance and impact resistance of the battery pack. The arrangement of the first reinforcing protrusion not only enhances the local strength of the elastic support, but also reduces the stress concentration at a single position by dispersing the stress, thereby prolonging the service life of the battery pack.

[0010] In an optional embodiment, the second support section is provided with the second reinforcing protrusion along the surface of the liquid cooling plate in the third direction, and the length direction of the second reinforcing protrusion is consistent with the second direction.

[0011] Beneficial effects: The arrangement of the second reinforcing protrusion not only enhances the local strength of the elastic support, but also reduces the stress concentration at a single position by dispersing the stress, thereby prolonging the service life of the battery pack.

[0012] In an optional embodiment, the length extension direction of the first reinforcing protrusion is oblique to the third direction and is arranged towards the liquid cooling plate, and the protruding direction of the second reinforcing protrusion extends towards the liquid cooling plate along the third direction.

[0013] Beneficial effects: The design that the length extension direction of the first reinforcing protrusion is oblique to the third direction not only enhances the shear resistance of the connection, but also improves the stability of the battery pack when subjected to lateral force. The protruding direction of the second reinforcing protrusion extends along the third direction, which directly enhances the support strength of the arched structure in the main stress direction, so that the battery pack can maintain better shape stability when subjected to vertical pressure.

[0014] In an optional embodiment, the second support section comprises a first sub-section, a second sub-section and a third sub-section, the length direction of the first sub-section is consistent with the first direction, the second sub-section and the third sub-section are connected with the two ends of the first sub-section respectively, and the length directions of the second sub-section and the third sub-section are oblique to the first direction.

[0015] Beneficial effects: The segmented design of the second support section makes the arch-shaped structure more flexible, capable of adapting to different directions of stress, thereby improving the adaptability and durability of the battery pack. This design also helps to optimize the internal space layout of the battery pack, not only improving the energy density and power density of the battery pack, but also enabling embedding with the recess on the liquid cooling plate, ensuring overall stability.

[0016] In an optional embodiment, the first reinforcing protrusion is connected with the first segment and the first support section at both ends along the second direction, and the second reinforcing protrusion is arranged on the first segment.

[0017] Beneficial effects: The design of the first reinforcing protrusion connecting the first segment and the first support section not only enhances the connection strength between the two, but also improves the anti-tearing ability of the battery pack when subjected to external impact. The second reinforcing protrusion is arranged on the first segment, directly enhancing the strength of the main stress part of the arch-shaped structure, so that the battery pack can maintain better shape and structural integrity when subjected to greater pressure.

[0018] In an optional embodiment, the liquid cooling plate comprises a first plate body and a second plate body.

[0019] The first plate body is connected with the frame, the first plate body and the second plate body are stacked along the third direction, and the first plate body and the second plate body are connected, the second plate body is provided with a plurality of liquid cooling protrusions on the side facing the elastic support along the third direction, a recess structure is formed between adjacent two liquid cooling protrusions, a liquid cooling groove is arranged in the liquid cooling protrusion, the first plate body closes the liquid cooling groove to form a liquid cooling channel, a plurality of liquid cooling channels are connected with each other for circulating cooling medium, a plurality of liquid cooling protrusions are arranged at intervals along the second direction, the second support section is connected with the first plate body, and the second support section is located between adjacent two liquid cooling protrusions, and the liquid cooling protrusion is provided with a recess structure matched with the second support section.

[0020] Beneficial effects: The design of the liquid cooling plate not only realizes the cooling function of the battery, but also forms a more close and stable connection with the elastic support through the arrangement of the liquid cooling protrusion and the recess structure, thereby improving the heat dissipation efficiency and structural strength of the battery pack. This design also helps to reduce the thermal stress inside the battery pack, reducing the risk of damage to the battery due to thermal expansion.

[0021] In an optional embodiment, the first reinforcing protrusion and the second reinforcing protrusion are arranged as solid structures.

[0022] Beneficial effects: The first and second reinforcing protrusions of solid structure have higher strength and rigidity, which can better withstand external pressure and impact, thereby improving the reliability and safety of the battery pack. This design also helps to reduce deformation and wear of the battery pack during long-term use, prolonging the service life of the battery pack.

[0023] In an alternative embodiment, the first support section, the second support section, the first reinforcing protrusion and the second reinforcing protrusion are configured as an integrated structure.

[0024] Beneficial effects: The design of integrated structure simplifies the manufacturing and assembly process, reduces costs, and improves the stability and reliability of the overall structure. This design also helps to reduce internal looseness and abnormal noise of the battery pack, improving the quietness and comfort of the battery pack.

[0025] In an alternative embodiment, a through hole is provided on the first support section, which penetrates the first support section along the third direction.

[0026] Beneficial effects: The through hole provided on the first support section not only reduces the overall weight, but also improves the energy efficiency ratio of the battery pack. This design also helps to optimize the heat dissipation performance of the battery pack by increasing the heat dissipation area and ventilation path, reducing the temperature of the battery pack.

[0027] In an alternative embodiment, the second reinforcing protrusion is in contact with the recessed structure, and the second support section is bonded to the recessed structure.

[0028] Beneficial effects: By providing liquid cooling protrusions and recessed structures, a more tight and stable connection with the elastic support is formed.

[0029] In an alternative embodiment, the first support section is welded to the bottom guard plate.

[0030] Beneficial effects: The connection strength between the elastic support and the bottom guard plate is enhanced.

[0031] In a second aspect, the application also provides a power consuming device comprising the above-mentioned battery pack.

[0032] Because the power consuming device includes the battery pack, it has the same effects as the battery pack, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the drawings needed to be used in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0034] Figure 1 A structural schematic diagram of a battery pack according to an embodiment of the present application;

[0035] Figure 2 A structural schematic diagram of a cover plate according to an embodiment of the present application;

[0036] Figure 3 A structural schematic diagram of the relative position of the elastic support and the liquid cooling plate according to an embodiment of the present application;

[0037] Figure 4 A structural schematic diagram of the elastic support according to an embodiment of the present application;

[0038] Figure 5 A partial enlarged view of A in the present application; Figure 4

[0039] Figure 6 A structural schematic diagram of the first plate body according to an embodiment of the present application;

[0040] Figure 7 A structural schematic diagram of the second plate body according to an embodiment of the present application;

[0041] Figure 8 A partial enlarged view of B in the present application; Figure 7

[0042] Figure 9 A structural schematic diagram of the liquid cooling channel according to an embodiment of the present application;

[0043] Figure 10 A structural schematic diagram of the connection relationship between the elastic support, the liquid cooling plate and the bottom guard plate according to an embodiment of the present application.

[0044] Explanation of reference signs:

[0045] ​​1, cover plate; 2, frame; 3, bottom plate assembly; 301, bottom guard plate; 302, elastic support; 303, liquid cooling plate; 3021, first support section; 3022, second support section; 3023, first reinforcing protrusion; 3024, second reinforcing protrusion; 30221, first sub-section; 30222, second sub-section; 30223, third sub-section; 3031, first plate body; 3032, second plate body; 30321, liquid cooling protrusion; 30211, through hole; X, first direction; Y, second direction; Z, third direction; 30322, liquid cooling groove; 4, recessed structure. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0047] The embodiments of the present application are described below with reference to Figures 1 to 10 .

[0048] According to the embodiments of the present application, in one aspect, a battery pack is provided, having a first direction X, a second direction Y and a third direction Z intersecting with each other, the battery pack comprising a cover plate 1, a frame 2 and a bottom plate assembly 3. The bottom plate assembly 3, the frame 2 and the cover plate 1 are sequentially connected along the third direction Z, both ends of the frame 2 along the third direction Z are respectively provided with openings, and the cover plate 1 and the bottom plate assembly 3 respectively close the two openings, so that a closed cavity is formed inside the cover plate 1, the frame 2 and the bottom plate assembly 3. The bottom plate assembly 3 comprises a bottom guard plate 301, an elastic support 302 and a liquid cooling plate 303 arranged along the third direction Z, and the bottom guard plate 301 and the liquid cooling plate 303 are connected with the frame 2. Among them, the elastic support 302 comprises a first support section 3021 and a second support section 3022, both the first support section 3021 and the second support section 3022 are provided with a plurality of first support sections 3021 and second support sections 3022, the first support section 3021 and the second support section 3022 are alternately arranged along the second direction Y, and adjacent first support section 3021 and second support section 3022 are connected, the first support section 3021 can be connected with the bottom guard plate 301, the second support section 3022 is protruded towards the liquid cooling plate 303 along the third direction Z to form an arch-shaped structure, and the second support section 3022 is connected with the liquid cooling plate 303; a first reinforcing protrusion 3023 is arranged between adjacent first support section 3021 and second support section 3022, and both ends of the first reinforcing protrusion 3023 along the second direction Y are connected with the first support section 3021 and the second support section 3022 respectively.

[0049] Reference is made to Figure 3and Figure 4 It can be understood that the elastic support 302 is composed of the first support section 3021 and the second support section 3022 arranged alternately, and the second support section 3022 is in an arch structure, so that the elastic support 302 can support the liquid cooling plate 303, and because the arch structure in the elastic support 302 supports, when the elastic support 302 is in contact with the liquid cooling plate 303 and the bottom guard plate 301 under stress, the pressure will cause the second support section 3022 to deform, thereby causing the support to fail, and the main deformation position is the connection position of the first support section 3021 and the second support section 3022, and the arch structure will be compressed to be flat.

[0050] It should be noted that through the above stress analysis, the first reinforcing protrusion 3023 can strengthen the connection position of the first support section 3021 and the second support section 3022, and the second reinforcing protrusion 3024 can strengthen the second support section 3022.

[0051] In the embodiment, the first support section 3021 and the second support section 3022 are arranged on the elastic support 302, and the second support section 3022 is arranged in an arch structure, which not only effectively fixes the liquid cooling plate 303 and prevents it from displacing in movement or vibration, but also significantly improves the shock resistance and impact resistance of the battery pack. The arrangement of the first reinforcing protrusion 3023 not only enhances the local strength of the elastic support 302, but also reduces the stress concentration at a single position by dispersing the stress, thereby prolonging the service life of the battery pack.

[0052] Referring to Figure 5 In some embodiments, the second support section 3022 is provided with a second reinforcing protrusion 3024 facing the surface of the liquid cooling plate 303 along the third direction Z, and the first reinforcing protrusion 3023 and the second reinforcing protrusion 3024 are arranged at intervals along the second direction Y.

[0053] Optionally, the first reinforcing protrusion 3023 and the second reinforcing protrusion 3024 are both provided with a plurality of first reinforcing protrusions 3023 arranged at intervals along the first direction X, and a plurality of second reinforcing protrusions 3024 arranged at intervals along the first direction X. The two ends of the first reinforcing protrusion 3023 along the second direction Y are connected with the first support section 3021 and the second support section 3022 respectively, and the length direction of the second reinforcing protrusion 3024 is consistent with the second direction Y.

[0054] Optionally, the second support section 3022 can be arranged as a partial bending structure on the elastic support 302.

[0055] In the embodiment, the first reinforcing protrusions 3023 and the second reinforcing protrusions 3024 are arranged at intervals, which not only improves the overall rigidity of the battery pack, but also enhances the anti-deformation ability in different directions, making the battery pack more adaptable to complex working environments.

[0056] In some embodiments, the length extension direction of the first reinforcing protrusions 3023 is oblique to the third direction Z and is arranged towards the liquid cooling plate 303, and the protrusion direction of the second reinforcing protrusions 3024 extends along the third direction Z towards the liquid cooling plate 303.

[0057] Optionally, the first reinforcing protrusions 3023 and the second reinforcing protrusions 3024 corresponding in position can be connected and arranged to form an integrated structure, which can further enhance the compression strength.

[0058] Optionally, the first reinforcing protrusions 3023 and the second reinforcing protrusions 3024 can be arranged as part of the bending structure on the elastic support 302.

[0059] In the embodiment, the design of the first reinforcing protrusions 3023 oblique to the third direction Z not only enhances the anti-shearing ability of the connection, but also improves the stability of the battery pack when subjected to lateral force. The second reinforcing protrusions 3024 extend along the third direction Z, directly enhancing the support strength of the arch-shaped structure in the main stress direction, so that the battery pack can maintain better shape stability when subjected to vertical pressure.

[0060] In some embodiments, the second support section 3022 includes a first segment 30221, a second segment 30222 and a third segment 30223, and the length direction of the first segment 30221 is consistent with the first direction X, and the second segment 30222 and the third segment 30223 are respectively connected with both ends of the first segment 30221, and the length direction of the second segment 30222 and the third segment 30223 is oblique to the first direction X.

[0061] It can be understood that the first segment 30221, the second segment 30222 and the third segment 30223 are all arranged as arch-shaped structures, and the concave spaces of the first segment 30221, the second segment 30222 and the third segment 30223 are connected to form an integrated structure, i.e., the concave parts of the through bending structure on one side of the elastic support 302 can be integrally formed. Such arrangement can facilitate the stamping forming of the elastic support 302.

[0062] In the embodiment, the segmented design of the second support section 3022 makes the arch-shaped structure more flexible, which can adapt to stress conditions in different directions, thereby improving the adaptability and durability of the battery pack. This design also helps to optimize the internal space layout of the battery pack, which not only improves the energy density and power density of the battery pack, but also realizes the embedding with the groove on the liquid cooling plate 303, ensuring the overall stability.

[0063] In some embodiments, the first reinforcing protrusion 3023 is connected with the first segment 30221 and the first support segment 3021 at two ends along the second direction Y, and the second reinforcing protrusion 3024 is arranged on the first segment 30221.

[0064] It can be understood that the length direction of the second segment 30222 and the third segment 30223 is oblique to the first direction X, which itself can play a role in strengthening the first segment 30221 against deformation, and therefore, the first reinforcing protrusion 3023 and the second reinforcing protrusion 3024 can be arranged on the first segment 30221.

[0065] In the present embodiment, the design that the first reinforcing protrusion 3023 connects the first segment 30221 and the first support segment 3021 not only enhances the connection strength between the two, but also improves the anti-tearing ability of the battery pack when subjected to external impact. The second reinforcing protrusion 3024 arranged on the first segment 30221 directly enhances the strength of the main stress part of the arch-shaped structure, so that the battery pack can maintain better shape and structural integrity when subjected to greater pressure.

[0066] Referring to Figure 6 , 7 , 8, 9, in some embodiments, the liquid cooling plate 303 comprises a first plate body 3031 and a second plate body 3032. The first plate body 3031 is connected with the frame 2, the first plate body 3031 and the second plate body 3032 are stacked along the third direction Z, and the first plate body 3031 is connected with the second plate body 3032, the second plate body 3032 is provided with a plurality of liquid cooling protrusions 30321 on one side of the elastic support 302 along the third direction Z, a recess structure 4 is formed between adjacent two liquid cooling protrusions, a liquid cooling groove 30322 is arranged in the liquid cooling protrusion 30321, the first plate body 3031 closes the liquid cooling groove 30322 to form a liquid cooling channel, a plurality of liquid cooling channels are connected with each other, for circulating cooling medium, a plurality of liquid cooling protrusions 30321 are arranged at intervals along the second direction Y, the second support segment 3022 is connected with the first plate body 3031, and the second support segment 3022 is located between adjacent two liquid cooling protrusions 30321, and the liquid cooling protrusion 30321 is provided with a recess structure 4 matched with the second support segment 3022.

[0067] In the present embodiment, the design of the liquid cooling plate 303 not only realizes the cooling function of the battery, but also forms a more close and stable connection with the elastic support 302 through the arrangement of the liquid cooling protrusion 30321 and the recess structure 4, thereby improving the heat dissipation efficiency and structural strength of the battery pack. This design also helps to reduce the thermal stress inside the battery pack, reducing the risk of damage to the battery due to thermal expansion.

[0068] In some embodiments, the first reinforcing protrusion 3023 and the second reinforcing protrusion 3024 are arranged as solid structures.

[0069] Optionally, the first reinforcing protrusion 3023 and the second reinforcing protrusion 3024 can be arranged as welding points.

[0070] Optionally, the first reinforcing protrusion 3023 and the second reinforcing protrusion 3024 can be arranged as hollow protrusion structures.

[0071] In this embodiment, the first reinforcing protrusion 3023 and the second reinforcing protrusion 3024 of the solid structure have higher strength and rigidity, which can better withstand external pressure and impact, thereby improving the reliability and safety of the battery pack. This design also helps to reduce deformation and wear of the battery pack during long-term use, prolonging the service life of the battery pack.

[0072] In some embodiments, the first support section 3021, the second support section 3022, the first reinforcing protrusion 3023, and the second reinforcing protrusion 3024 are configured as an integrated structure.

[0073] In this embodiment, the design of the integrated structure simplifies the manufacturing and assembly process, reduces costs, and improves the stability and reliability of the overall structure. This design also helps to reduce internal looseness and abnormal noise in the battery pack, improving the quietness and comfort of the battery pack.

[0074] In some embodiments, the first support section 3021 is provided with a through hole 30211, and the through hole 30211 penetrates the first support section 3021 along the third direction Z.

[0075] In this embodiment, the through hole 30211 provided on the first support section 3021 not only reduces the overall weight, but also improves the energy efficiency ratio of the battery pack. This design also helps to optimize the heat dissipation performance of the battery pack by increasing the heat dissipation area and ventilation path, reducing the temperature of the battery pack.

[0076] In some embodiments, the second reinforcing protrusion 3024 abuts against the recessed structure 4, and the second support section 3022 is bonded to the recessed structure 4.

[0077] In this embodiment, through the arrangement of the liquid cooling protrusion 30321 and the recessed structure 4, a more tight and stable connection is formed with the elastic support 302.

[0078] In some embodiments, the first support section 3021 is welded to the bottom guard plate 301.

[0079] In this embodiment, the connection strength between the elastic support 302 and the bottom guard plate 301 is enhanced.

[0080] According to the embodiments of the present application, the other aspect further provides a power-using device comprising the battery pack.

[0081] Because the power-using device comprises the battery pack, has the same effect as the battery pack, and is not described here.

[0082] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be suggested by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes are intended to fall within the scope of the appended claims.

Claims

1. A battery pack having a first direction (X), a second direction (Y), and a third direction (Z) that intersect two by two, characterized in that, The battery pack comprises: A cover plate (1), a frame (2) and a bottom plate assembly (3), the frame (2) is provided with an opening at both ends along the third direction (Z), and the cover plate (1) and the bottom plate assembly (3) respectively close the two openings; The bottom plate assembly (3) comprises a bottom guard plate (301), an elastic support (302) and a liquid cooling plate (303) arranged along the third direction (Z), and the bottom guard plate (301) and the liquid cooling plate (303) are connected with the frame (2); The elastic support (302) comprises a first support section (3021) and a second support section (3022), the first support section (3021) and the second support section (3022) are provided with a plurality of, the first support section (3021) and the second support section (3022) are arranged alternately along the second direction (Y), and adjacent first support section (3021) and the second support section (3022) are connected, the first support section (3021) is connected with the bottom guard plate (301), and the second support section (3022) is protruded along the third direction (Z) to the liquid cooling plate (303) and is connected with the liquid cooling plate (303); A first reinforcing protrusion (3023) is arranged between adjacent first support section (3021) and second support section (3022), and the first reinforcing protrusion (3023) is connected with the first support section (3021) and the second support section (3022) at both ends along the second direction (Y).

2. The battery pack of claim 1, wherein: A second reinforcing protrusion (3024) is arranged on the surface of the second support section (3022) along the third direction (Z) to the liquid cooling plate (303), and the length direction of the second reinforcing protrusion (3024) is consistent with the second direction (Y).

3. The battery pack of claim 2, wherein: The length extension direction of the first reinforcing protrusion (3023) is oblique to the third direction (Z) and is arranged towards the liquid cooling plate (303), and the protruding direction of the second reinforcing protrusion (3024) extends along the third direction (Z) to the liquid cooling plate (303).

4. The battery pack of claim 3, wherein, The second support section (3022) comprises: The first segment (30221), the second segment (30222) and the third segment (30223), and the length direction of the first segment (30221) is consistent with the first direction (X), the second segment (30222) and the third segment (30223) are connected with two ends of the first segment (30221) respectively, and the length direction of the second segment (30222) and the third segment (30223) is oblique to the first direction (X); the two ends of the first reinforcing protrusion (3023) along the second direction (Y) are connected with the first segment (30221) and the first support segment (3021) respectively, and the second reinforcing protrusion (3024) is arranged on the first segment (30221).

5. The battery pack of claim 4, wherein, The liquid cooling plate (303) comprises: A first plate body (3031) connected with the frame (2); A second plate body (3032), the first plate body (3031) and the second plate body (3032) are stacked along the third direction (Z), and the first plate body (3031) and the second plate body (3032) are connected, and the second plate body (3032) is provided with a plurality of liquid cooling protrusions (30321) on the side of the elastic support (302) along the third direction (Z), and a recess structure (4) is formed between two adjacent liquid cooling protrusions, a liquid cooling groove (30322) is arranged in the liquid cooling protrusion (30321), the first plate body (3031) closes the liquid cooling groove (30322) to form a liquid cooling channel, a plurality of liquid cooling protrusions (30321) are arranged at intervals along the second direction (Y), the second support segment (3022) is connected with the first plate body (3031), and the second support segment (3022) is located between two adjacent liquid cooling protrusions (30321), and the second support segment (3022) is matched with the recess structure (4).

6. The battery pack of claim 2, wherein: The first support segment (3021), the second support segment (3022), the first reinforcing protrusion (3023) and the second reinforcing protrusion (3024) are configured as an integrated structure.

7. The battery pack of claim 1, wherein: The first support segment (3021) is provided with a through hole (30211), and the through hole (30211) penetrates the first support segment (3021) along the third direction (Z).

8. The battery pack of claim 5, wherein: The second reinforcing protrusion (3024) abuts against the recess structure (4), and the second support segment (3022) is bonded with the recess structure (4).

9. The battery pack of claim 1, wherein: The first support segment (3021) is welded with the bottom guard plate (301).

10. An electrical device, characterized by The battery pack of any one of claims 1-9. The battery pack of any one of claims 1-9.

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