Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment, and the battery pack comprises a box body which comprises a bottom plate and an edge beam; the box body further comprises a first cover body, the first cover body is arranged on the side, away from the bottom plate, of the edge beam in the third direction Z, and the first cover body, the bottom plate and the edge beam jointly define a first containing cavity. The battery cell is arranged in the first accommodating cavity; the shell is connected to the side, away from the first containing cavity, of the first cover body; a second containing cavity is defined by the shell and the first cover body, and the second containing cavity and the first containing cavity are arranged in a stacked mode in the third direction; an opening is formed in the side, away from the first cover body, of the shell and communicates with the second containing cavity. The electrical module is arranged in the second accommodating cavity and is connected with the battery cell; and the second cover body is detachably connected with the shell, and the second cover body is suitable for covering the opening. According to the battery pack provided by the utility model, more accommodating spaces can be reserved for the battery cells, so that the electrical module is convenient to disassemble, maintain and replace.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery pack and an electrical device. Background Technology

[0002] Battery packs provide stable, high-energy-density DC power for electric vehicles, energy storage systems, and portable electronic devices. Battery pack design is crucial for achieving efficient, safe, and economical battery use. However, in existing battery packs, the battery control system, such as the Battery Management System (BMS) and Battery Distribution Unit (BDU), is often located at the front of the pack and shares a cover with the battery cells. This makes the components in the battery control system more susceptible to damage, and replacement or repair requires removing the entire battery pack cover, making maintenance extremely inconvenient. Utility Model Content

[0003] In view of this, the present invention provides a battery pack and electrical equipment to solve the problem of inconvenient maintenance of the electrical area structure of the battery pack.

[0004] In a first aspect, this utility model provides a battery pack having intersecting first directions X, second directions Y, and third directions Z, comprising:

[0005] The enclosure includes a bottom plate and a side beam extending from the peripheral edge of the bottom plate in a direction away from the bottom plate along a third direction Z; the enclosure also includes a first cover, which is disposed on the side of the side beam away from the bottom plate along a third direction Z, and the first cover, the bottom plate and the side beam together enclose a first receiving cavity;

[0006] The battery cell is disposed within the first receiving cavity;

[0007] The shell is connected to the side of the first cover away from the first receiving cavity; the shell and the first cover enclose a second receiving cavity, and the second receiving cavity and the first receiving cavity are stacked in a third direction; the shell has an opening on the side away from the first cover, and the opening is connected to the second receiving cavity;

[0008] An electrical module is housed within the second receiving cavity and connected to the battery cell;

[0009] The second cover is detachably connected to the housing and is suitable for sealing the opening.

[0010] Beneficial effects: The battery pack provided by this utility model, by separately setting a shell on the box body, thereby isolating a second receiving cavity that is stacked with the first receiving cavity along the third direction Z on the box body, not only avoids mutual interference between the electrical module and the battery cell during maintenance, but also makes more efficient use of the battery cell receiving space in the first receiving cavity, thus leaving more space for the battery cell; by opening an opening on one side of the shell, the opening is connected to the second receiving cavity, and a second cover is provided that is detachably connected to the shell, so that the electrical module can be disassembled, maintained and replaced through the opening, and then the opening is sealed by the second cover, thereby preventing foreign objects from entering the second receiving cavity and avoiding damage to the electrical module.

[0011] In one alternative embodiment, the housing is provided with a plurality of first connecting portions on the side of the housing away from the first cover in a third direction Z. The plurality of first connecting portions are spaced apart from each other and arranged around the opening. The first connecting portions are used to install bolts and / or screws to make the housing and the second cover detachably connected.

[0012] Beneficial effects: Facilitates the individual disassembly, assembly, and maintenance of electrical modules.

[0013] In one alternative embodiment, the electrical module includes a base and an electrical component, both of which are disposed within a second receiving cavity. The base is detachably disposed on the side of the first cover opposite to the bottom plate, and the electrical component is detachably connected to the base.

[0014] Beneficial effects: This facilitates the disassembly, maintenance, and replacement of electrical modules.

[0015] In one alternative embodiment, the base has an outer peripheral surface surrounding a third direction, and the base is provided with a plurality of second connecting portions, which are spaced apart from each other and arranged along the outer peripheral surface of the base; the second connecting portions are used to install bolts and / or screws to make the base detachably connected to the first cover.

[0016] Beneficial effects: This locks the electrical module to one side of the first cover, making it easier to disassemble, maintain, and replace the electrical module.

[0017] In one alternative embodiment, the base portion extends in a third direction away from the first cover and forms a third connection portion, wherein the electrical components are detachably connected to the third connection portion by bolts and / or screws.

[0018] Beneficial effects: Facilitates the disassembly, maintenance, and replacement of electrical components.

[0019] In one alternative embodiment, the electrical module further includes a third cover, which is detachably connected to the base; the third cover is adapted to enclose a third receiving cavity together with the base, and the third receiving cavity is adapted to accommodate electrical components.

[0020] Beneficial effects: This provides insulation protection for electrical components, ensuring the electrical safety of electrical modules.

[0021] In one alternative embodiment, the battery pack further includes a liquid cooling plate disposed in the second receiving cavity, with one side of the liquid cooling plate abutting against the first cover and the other side connected to the base.

[0022] The electrical module also includes adapter plates. There are multiple electrical components distributed on the base. There are multiple adapter plates connected to each electrical component. At least one adapter plate has an exposed section that is exposed on the side of the base facing the liquid cooling plate. There is a heat-conducting layer between the exposed section and the liquid cooling plate.

[0023] Beneficial effects: This improves the heat transfer efficiency between the adapter plate and the liquid cooling plate, thereby enhancing the cooling effect of the liquid cooling plate on the electrical module.

[0024] In one optional embodiment, the base further includes a plurality of first snap-fit ​​portions, which are spaced apart along the outer periphery of the base and spaced apart from the second connecting portions; the third cover is provided with a second snap-fit ​​portion that is disposed opposite to the first snap-fit ​​portions along a third direction, and the second snap-fit ​​portion is snapped together with the first snap-fit ​​portion.

[0025] Beneficial effects: This enables a detachable connection between the base and the third cover, facilitating the disassembly, maintenance, and replacement of electrical components.

[0026] In one alternative implementation, the electrical module further includes a fourth cover, which is an insulating cover;

[0027] The fourth cover has a first hinge and a third snap-fit. The fourth cover has a first side facing away from the first cover and a second side perpendicular to the first side. The third snap-fit ​​is disposed on the first side and the first hinge is disposed on the second side. The third cover has a second hinge and a fourth snap-fit, which are respectively disposed opposite to the first hinge and the third snap-fit. The first hinge and the second hinge are rotatably connected, and the third snap-fit ​​is adapted to snap-fit ​​with the fourth snap-fit.

[0028] Along the third direction, the fourth cover covers at least a portion of the adapter piece.

[0029] Beneficial effects: By setting a fourth cover made of insulating material at the electrical connection point of the electrical module, electrical safety protection is provided for the electrical connection point of the electrical module; by setting a first hinge and a second hinge for rotational connection, the fourth cover can be flipped over during assembly to expose the electrical connection point of the electrical module, facilitating assembly operations; after assembly, the third snap-fit ​​part can be adapted to snap-fit ​​with the fourth snap-fit ​​part, thereby covering the electrical connection point of the electrical module to achieve electrical safety protection.

[0030] Secondly, this utility model also provides an electrical device, including: a device body, and a battery pack as described above.

[0031] Beneficial effects: By adopting the battery pack of the first aspect, the electrical equipment of the second aspect not only avoids the mutual interference between the electrical module and the battery cell during maintenance, but also makes more efficient use of the battery cell storage space in the first housing cavity, thereby leaving more storage space for the battery cell; by setting the second cover to be detachably connected to the housing, it is convenient to disassemble, maintain and replace the electrical module through the opening, and then seal the opening with the second cover, thereby preventing foreign objects from entering the second housing cavity and avoiding damage to the electrical module. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is an exploded view of a battery pack according to an embodiment of the present utility model;

[0034] Figure 2 This is a front view of a battery pack according to an embodiment of the present utility model;

[0035] Figure 3 for Figure 2 Sectional view of section AA;

[0036] Figure 4 This is an exploded view of the battery pack casing and the second cover according to an embodiment of the present invention;

[0037] Figure 5 This is an exploded view of the electrical module of the battery pack according to an embodiment of the present invention;

[0038] Figure 6 This is a top view of the electrical module of the battery pack according to an embodiment of the present utility model;

[0039] Figure 7 for Figure 6 Sectional view of section BB;

[0040] Figure 8 for Figure 7 A magnified view of a portion of point C in the middle;

[0041] Figure 9 for Figure 6 Sectional view of section DD;

[0042] Figure 10 for Figure 9 A magnified view of a portion of point E in the middle;

[0043] Figure 11 This is a perspective view of the electrical module of the battery pack according to an embodiment of the present utility model;

[0044] Figure 12 for Figure 11 A magnified view of a portion of point F in the middle;

[0045] Figure 13 for Figure 11 A magnified view of a portion of point G in the middle;

[0046] Figure 14 This is an exploded view of the electrical module and liquid cooling plate of the battery pack according to an embodiment of the present invention;

[0047] Figure 15 for Figure 13 A three-dimensional view of the fourth cover.

[0048] Explanation of reference numerals in the attached figures:

[0049] 10. Box body; 101. First receiving cavity; 11. Base plate; 12. Side beam; 13. First cover;

[0050] 20. Shell; 201. Second receiving cavity; 202. Opening; 21. First connecting part;

[0051] 30. Second cover;

[0052] 40. Electrical module; 401. Third receiving cavity;

[0053] 41. Base; 411. Second connecting part; 412. Third connecting part; 413. Fifth connecting part; 414. First snap-fit ​​part;

[0054] 42. Electrical components; 421. Fourth connection part;

[0055] 43. Third cover; 431. Second snap-fit ​​part; 432. Second hinge part; 433. Fourth snap-fit ​​part;

[0056] 44. Fourth cover; 4401. First side surface; 4402. Second side surface; 441. First hinge; 442. Third snap-fit;

[0057] 45. Adapter piece; 451. Exposed section;

[0058] 50. Liquid cooling plate;

[0059] 60. Thermal conductive layer;

[0060] 70. Battery cells;

[0061] X—first direction; Y—second direction; Z—third direction. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0063] The following is combined with Figures 1 to 15 The following describes embodiments of the present invention.

[0064] According to an embodiment of the present invention, in one aspect, a battery pack is provided, having intersecting first directions X, second directions Y, and a third direction Z, comprising:

[0065] The box body 10 includes a bottom plate 11 and a side beam 12 extending from the peripheral edge of the bottom plate 11 in a direction away from the bottom plate 11 along a third direction Z; the box body 10 also includes a first cover 13, which is disposed on the side of the side beam 12 away from the bottom plate 11 along a third direction Z, and the first cover 13, the bottom plate 11 and the side beam 12 together enclose a first receiving cavity 101;

[0066] A battery cell 70 is disposed in the first receiving cavity 101, and multiple battery cells 70 are arranged along the first direction X and the second direction Y.

[0067] The housing 20 is connected to the side of the first cover 13 away from the first receiving cavity 101; the inner wall of the housing 20 and the first cover 13 enclose the second receiving cavity 201 to form the second receiving cavity 201, and the second receiving cavity 201 and the first receiving cavity 101 are stacked in the third direction Z; the housing 20 is provided with an opening 202 on the side away from the first cover 13, and the opening 202 is connected to the second receiving cavity 201;

[0068] The electrical module 40 is disposed in the second receiving cavity 201 and is connected to the battery cell 70;

[0069] The second cover 30 is detachably connected to the housing 20 and is adapted to cover the opening 202.

[0070] The battery pack provided by this utility model, by separately setting a shell 20 on the housing 10, isolates a second receiving cavity 201 on the housing 10, which is stacked with the first receiving cavity 101 along the third direction Z. This not only avoids mutual interference between the electrical module 40 and the battery cell 70 during maintenance, but also makes more efficient use of the battery cell receiving space in the first receiving cavity, thus leaving more space for the battery cell. By opening an opening 202 on one side of the shell 20, the opening 202 is connected to the second receiving cavity 201. A second cover 30 is detachably connected to the shell 20, so that the electrical module 40 can be disassembled, maintained and replaced through the opening 202. Then, the opening 202 is sealed by the second cover 30, thereby preventing foreign objects from entering the second receiving cavity 201 and avoiding damage to the electrical module 40.

[0071] It should be noted that the housing 20 can be built into the first receiving cavity 101, thereby isolating the first receiving cavity 101 from the second receiving cavity 201 through the housing 20, thus achieving spatial isolation between the electrical module 40 and the battery cell 70; or the housing 20 can be placed outside the housing 10, which can also achieve spatial isolation between the electrical module 40 and the battery cell 70.

[0072] Furthermore, the side of the housing 20 closest to the first cover 13 along the third direction Z can be bonded to the first cover 13, and the housing 20 and the first cover 13 can also be connected by bolts and / or screws.

[0073] In some embodiments, see Figure 4 As shown, the housing 20 has a plurality of first connecting parts 21 on the side away from the first cover 13 along the third direction Z. The plurality of first connecting parts 21 are spaced apart from each other and arranged around the opening 202. The first connecting parts 21 are screw holes and are used to install bolts and / or screws to make the housing 20 and the second cover 30 detachably connected, thereby facilitating the individual disassembly and maintenance of the electrical module 40.

[0074] In some embodiments, see Figure 5As shown, the electrical module 40 includes a base 41 and an electrical component 42. Both the base 41 and the electrical component 42 are disposed in the second receiving cavity 201. The base 41 is detachably disposed on the side of the first cover 13 away from the bottom plate 11. The base 41 and the first cover 13 can be detachably connected by bolts and / or screws. The electrical component 42 and the base 41 can be detachably connected by bolts and / or screws, thereby facilitating the disassembly, maintenance and replacement of the electrical module 40.

[0075] In some embodiments, please combine Figure 5 and Figure 6 As shown, the base 41 has an outer peripheral surface surrounding a third direction Z. The base 41 is provided with a plurality of second connecting parts 411, which are spaced apart from each other and arranged along the outer peripheral surface of the base 41. The second connecting parts 411 are screw holes, which are used to install bolts and / or screws to make the base 41 detachably connected to the first cover 13, thereby locking the electrical module 40 to one side of the first cover 13, which facilitates the disassembly, maintenance and replacement of the electrical module 40.

[0076] Furthermore, the base 41 and the second connecting part 411 are integrally formed.

[0077] In some embodiments, please combine Figure 7 and Figure 8 As shown, the base 41 extends along the third direction Z away from the first cover 13 and forms a third connection 412. The electrical component 42 is detachably connected to the third connection 412 by bolts and / or screws.

[0078] Furthermore, the electrical component 42 includes a fourth connection portion 421, which is disposed opposite to the third connection portion 412 along the third direction Z, and the fourth connection portion 421 and the third connection portion 412 are detachably connected by bolts and / or screws.

[0079] In this embodiment, a third connecting part 412 is provided on one side of the base 41, and a fourth connecting part 421 is provided on the outer wall of the electrical component 42. The fourth connecting part 421 and the third connecting part 412 are detachably connected by bolts and / or screws, thereby locking the electrical component 42 to one side of the base 41, which facilitates the disassembly, maintenance and replacement of the electrical component 42.

[0080] In some embodiments, see Figure 7As shown, the electrical module 40 also includes a third cover 43, which is made of insulating material and is detachably connected to the base 41. The third cover 43 is adapted to form a third receiving cavity 401 together with the base 41. The third receiving cavity 401 is adapted to accommodate the electrical component 42, thereby providing insulation protection for the electrical component 42 and ensuring the electrical safety of the electrical module 40.

[0081] In some embodiments, please combine Figure 5 , Figure 9 and Figure 14 As shown, the battery pack also includes a liquid cooling plate 50, which is disposed in the second receiving cavity 201. The side of the liquid cooling plate 50 along the third direction Z abuts against the first cover 13, and the other side is connected to the base 41.

[0082] The electrical module 40 also includes an adapter piece 45. There are multiple electrical components 42 distributed on the base 41. There are multiple adapter pieces 45 and they are respectively connected between each electrical component 42. At least one adapter piece 45 has an exposed section 451, which is exposed on the side of the base 41 facing the liquid cooling plate 50. There is a heat-conducting layer 60 between the exposed section 451 and the liquid cooling plate 50.

[0083] It should be noted that the adapter piece 45 is made of a material with excellent electrical and thermal conductivity. There are multiple adapter pieces 45, which are connected between each electrical component 42. On the one hand, they can effectively conduct current. On the other hand, they can provide mechanical support for each electrical component 42. Furthermore, they can help dissipate the heat generated at the electrical connection point, thereby reducing the local temperature of the electrical module 40 and improving the reliability and safety of the system.

[0084] In this embodiment, at least one adapter piece 45 has an exposed section 451, which is exposed on the side of the base 41 facing the liquid cooling plate 50. A heat-conducting layer 60 is provided between the exposed section 451 and the liquid cooling plate 50, thereby improving the heat conduction efficiency between the adapter piece 45 and the liquid cooling plate 50, and thus enhancing the cooling effect of the liquid cooling plate 50 on the electrical module 40.

[0085] Furthermore, please combine them together. Figure 9 and Figure 10 As shown, the base 41 also includes a fifth connecting part 413, which extends from the base 41 along the third direction Z toward the third cover 43. The fifth connecting part 413 is detachably connected to the third cover 43 by bolts and / or screws, thereby facilitating the disassembly, maintenance and replacement of the electrical component 42.

[0086] In some embodiments, please combine Figure 11 and Figure 12As shown, the base 41 also includes a plurality of first snap-fit ​​portions 414, which are spaced apart along the outer periphery of the base 41, and the first snap-fit ​​portions 414 are spaced apart from the second connecting portions 411; the third cover 43 is provided with a second snap-fit ​​portion 431 that is opposite to the first snap-fit ​​portions 414 along the third direction Z, and the second snap-fit ​​portion 431 is snapped together with the first snap-fit ​​portion 414, thereby realizing a detachable connection between the base 41 and the third cover 43, which facilitates the disassembly, maintenance and replacement of the electrical components 42.

[0087] Furthermore, the first snap-fit ​​part 414 and the base 41 are integrally formed, and the second snap-fit ​​part 431 and the third cover 43 are integrally formed.

[0088] In some embodiments, please combine Figure 11 and Figure 13 As shown, the electrical module 40 also includes a fourth cover 44, which is an insulating cover;

[0089] Please combine them together Figure 15 As shown, the fourth cover 44 is provided with a first hinge portion 441 and a third snap-fit ​​portion 442. The fourth cover 44 has a first side surface 4401 facing away from the first cover 13 and a second side surface 4402 perpendicular to the first side surface 4401. The third snap-fit ​​portion 442 is disposed on the first side surface 4401, and the first hinge portion 441 is disposed on the second side surface 4402. The third cover 43 is provided with a second hinge portion 432 and a fourth snap-fit ​​portion 433, which are respectively disposed opposite to the first hinge portion 441 and the third snap-fit ​​portion 442. The first hinge portion 441 is rotatably connected to the second hinge portion 432, and the third snap-fit ​​portion 442 is adapted to be snap-fit ​​connected to the fourth snap-fit ​​portion 433.

[0090] Along the third direction Z, the fourth cover 44 covers at least a portion of the adapter piece 45.

[0091] In this embodiment, a fourth cover 44, made of insulating material, is provided at the electrical connection portion of the electrical module 40 to provide electrical safety protection for the electrical connection portion. By providing a first hinge portion 441 and a second hinge portion 432 for rotatable connection, the fourth cover 44 can be flipped over during assembly to expose the electrical connection portion of the electrical module 40, facilitating assembly. After assembly, the third snap-fit ​​portion 442 can be adapted to snap-fit ​​with the fourth snap-fit ​​portion 433, thereby covering the electrical connection portion of the electrical module 40 with the fourth cover 44 to achieve electrical safety protection.

[0092] According to an embodiment of the present invention, another aspect provides an electrical device, including: a device body, and a battery pack as described above.

[0093] The electrical device in this embodiment, by adopting the aforementioned battery pack, not only avoids mutual interference between the electrical module 40 and the battery cell 70 during maintenance, but also enables more efficient use of the battery cell accommodating space in the first accommodating cavity, thereby leaving more accommodating space for the battery cell 70; by setting the second cover 30 to be detachably connected to the housing 20, it is convenient to disassemble, maintain and replace the electrical module 40 through the opening 202, and then seal the opening 202 with the second cover 30, thereby preventing foreign objects from entering the second accommodating cavity 201 and avoiding damage to the electrical module 40.

[0094] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack having intersecting first directions (X), second directions (Y), and a third direction (Z), characterized in that, include: The box body (10) includes a bottom plate (11) and a side beam (12) extending from the peripheral edge of the bottom plate (11) in a direction away from the bottom plate (11) along the third direction (Z); the box body (10) also includes a first cover (13), the first cover (13) being disposed on the side of the side beam (12) away from the bottom plate (11) along the third direction (Z), the first cover (13) together with the bottom plate (11) and the side beam (12) forming a first receiving cavity (101); The battery cell (70) is disposed in the first receiving cavity (101); A housing (20) is connected to the side of the first cover (13) away from the first receiving cavity (101); the housing (20) and the first cover (13) enclose a second receiving cavity (201), and the second receiving cavity (201) and the first receiving cavity (101) are stacked along the third direction (Z); an opening (202) is provided on the side of the housing (20) away from the first cover (13), and the opening (202) is connected to the second receiving cavity (201); An electrical module (40) is disposed in the second receiving cavity (201) and connected to the battery cell (70); A second cover (30) is detachably connected to the housing (20) and is adapted to cover the opening (202).

2. The battery pack according to claim 1, characterized in that, The housing (20) is provided with a plurality of first connecting parts (21) on the side away from the first cover (13) along the third direction (Z). The plurality of first connecting parts (21) are spaced apart from each other and arranged around the opening (202). The first connecting parts (21) are used to install bolts and / or screws to make the housing (20) detachably connected to the second cover (30).

3. The battery pack according to claim 2, characterized in that, The electrical module (40) includes a base (41) and an electrical component (42). The base (41) and the electrical component (42) are both disposed in the second receiving cavity (201). The base (41) is detachably disposed on the side of the first cover (13) away from the bottom plate (11). The electrical component (42) is detachably connected to the base (41).

4. The battery pack according to claim 3, characterized in that, The base (41) has an outer peripheral surface surrounding the third direction (Z), and the base (41) is provided with a plurality of second connecting parts (411), which are spaced apart from each other and arranged along the outer peripheral surface of the base (41); the second connecting parts (411) are used to install bolts and / or screws so that the base (41) is detachably connected to the first cover (13).

5. The battery pack according to claim 4, characterized in that, The base (41) portion extends along the third direction (Z) away from the first cover (13) and forms a third connection portion (412), and the electrical component (42) is detachably connected to the third connection portion (412) by bolts and / or screws.

6. The battery pack according to claim 4 or 5, characterized in that, The electrical module (40) further includes a third cover (43), which is detachably connected to the base (41); the third cover (43) is adapted to form a third receiving cavity (401) together with the base (41), and the third receiving cavity (401) is adapted to accommodate the electrical component (42).

7. The battery pack according to claim 6, characterized in that, The battery pack also includes a liquid cooling plate (50), which is disposed in the second receiving cavity (201). One side of the liquid cooling plate (50) along the third direction (Z) abuts against the first cover (13), and the other side is connected to the base (41). The electrical module (40) further includes an adapter plate (45). There are multiple electrical components (42) distributed on the base (41). There are multiple adapter plates (45) and they are respectively connected between each of the electrical components (42). At least one adapter plate (45) has an exposed section (451) exposed on the side of the base (41) facing the liquid cooling plate (50). There is a heat-conducting layer (60) between the exposed section (451) and the liquid cooling plate (50).

8. The battery pack according to claim 6, characterized in that, The base (41) further includes a plurality of first snap-fit ​​portions (414), which are spaced apart along the outer periphery of the base (41) and are spaced apart from the second connecting portions (411); the third cover (43) is provided with a second snap-fit ​​portion (431) which is opposite to the first snap-fit ​​portion (414) along the third direction (Z), and the second snap-fit ​​portion (431) is snapped together with the first snap-fit ​​portion (414).

9. The battery pack according to claim 7, characterized in that, The electrical module (40) also includes a fourth cover (44), which is an insulating cover; The fourth cover (44) is provided with a first hinge portion (441) and a third snap-fit ​​portion (442). The fourth cover (44) has a first side surface (4401) facing away from the first cover (13) and a second side surface (4402) perpendicular to the first side surface (4401). The third snap-fit ​​portion (442) is disposed on the first side surface (4401), and the first hinge portion (441) is disposed on the second side surface (4402). The third cover (43) is provided with a second hinge portion (432) and a fourth snap-fit ​​portion (433), which are respectively disposed opposite to the first hinge portion (441) and the third snap-fit ​​portion (442). The first hinge portion (441) is rotatably connected to the second hinge portion (432), and the third snap-fit ​​portion (442) is adapted to snap-fit ​​with the fourth snap-fit ​​portion (433). Along the third direction (Z), the fourth cover (44) covers at least a portion of the adapter piece (45).

10. An electrical appliance, characterized in that, include: The device body, and the battery pack as described in any one of claims 1-9 above.

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