Battery pack and electric equipment comprising same
By setting grooves to fill the seals on the battery pack frame, the problem of loss of elasticity of the sealing ring is solved, achieving a long-lasting sealing effect for the battery pack and improving the performance of the battery and the whole vehicle.
Patent Information
- Application Number
- CN202422745029.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-11
AI Technical Summary
In traditional battery pack sealing methods, the sealing ring loses its elasticity due to long-term excessive compression, affecting the performance of the battery and the entire vehicle.
The battery pack has spaced grooves on its edge, which are filled with seals. The seals abut against the cover and deform to fill the grooves when squeezed, thus avoiding excessive compression and achieving a double seal.
Extend the life of seals, improve the sealing effect of battery packs, and enhance the safety and service life of the entire vehicle.
Smart Images
Figure CN223539776U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of batteries, and specifically proposes a battery pack and an electrical device including the same. Background Technology
[0002] With the popularization of new energy vehicles, the market has higher and higher requirements for battery performance, especially in terms of safety and service life. As a key component that protects the cells and provides connections between the cells and the outside, the design of the battery pack has a direct impact on the performance of the whole vehicle.
[0003] In related technologies, regarding the sealing technology of battery packs, the traditional sealing method usually involves two structural surfaces being attached together and a sealing ring being added between them. However, the sealing ring is under excessive and rigid compression for a long time, which can easily lead to its shrinkage and loss of elasticity, resulting in sealing failure and affecting the performance of the battery and the whole vehicle. Utility Model Content
[0004] The purpose of this application is to solve at least some of the technical problems mentioned above, and this purpose is achieved through the following technical solutions:
[0005] In a first aspect, this application proposes a battery pack having a third direction and including a housing and a battery cell assembly; the housing includes a first cover and a frame, the frame having a first opening on one side along the third direction, the first cover connecting to the frame and covering the first opening, the first cover and the frame forming a cavity; wherein, the frame has a first sealing plane, the first sealing plane being disposed on the side of the frame facing the first cover and surrounding the first opening, the first sealing plane having a first groove and a second groove spaced apart, the first groove and the second groove both surrounding the first opening, and the second groove being disposed around the periphery of the first groove; a sealing element is respectively provided in the first groove and the second groove, and the sealing element abuts against the first cover; the battery cell assembly includes multiple battery cells, all of which are disposed within the cavity.
[0006] In some embodiments, a deformation space is reserved between the first groove and / or the second groove and the bottom of the seal. The seal is assembled into the first groove and / or the second groove and is deformed by the pressure of the first cover to fill the deformation space.
[0007] In some embodiments, the seal has an extension direction along the circumferential direction of the first opening and a cross section perpendicular to its extension direction, and the cross section is trapezoidal; the first groove and / or the second groove are right-angled grooves, and there is a gap between the seal and the sidewall of the first groove and / or the second groove to form a deformation space.
[0008] In some embodiments, with the frame facing upwards, the seal has a protruding portion relative to the first sealing plane, and the first cover is assembled with the frame and abuts against the protruding portion.
[0009] In some embodiments, the cross-section of the protruding portion is arc-shaped or right-angled.
[0010] In some embodiments, a plurality of locking attachments are provided between the first groove and the second groove, and the plurality of locking attachments are spaced apart along the extension direction of the first sealing plane, and the locking attachments lock the first cover and the frame.
[0011] In some embodiments, the lock accessory includes a locking post and a washer, the locking post being disposed in a third direction through the first cover and the frame, and the washer being sleeved on the locking post and located between the first cover and the frame.
[0012] In some embodiments, the housing further includes a second cover, and the frame has a second opening on the side opposite to the first cover along a third direction. The second cover is connected to the frame and covers the second opening. The first cover, the second cover, and the frame together form a cavity. The frame also has a second sealing plane, which is disposed on the side of the frame facing the second cover and surrounds the second opening. The second sealing plane has a third groove and a fourth groove spaced apart. The third groove and the fourth groove both surround the second opening, and the fourth groove is disposed around the periphery of the third groove. A sealing element is provided in the third groove and the fourth groove, and the sealing element abuts against the second cover.
[0013] In some embodiments, the housing further includes a liquid cooling plate; the frame also has an assembly portion disposed on the inner sidewall of the frame facing the cavity, and the assembly portion protrudes inward relative to the inner sidewall; in the third direction of the frame, the assembly portion encloses to form a third opening, the axes of the first opening, the second opening and the third opening are parallel to each other, and the area of the third opening is smaller than the area of the first opening or the second opening; the liquid cooling plate connects to the assembly portion and covers the third opening, and the liquid cooling plate is located between the first cover and the second cover; the assembly portion has a third sealing plane disposed on the side of the assembly portion facing the liquid cooling plate and surrounding the third opening, the third sealing plane has two grooves spaced apart, both grooves surrounding the third opening, and one of the two grooves is disposed on the outer periphery of the other; the two grooves are respectively filled with sealing elements, and the sealing elements abut against the liquid cooling plate.
[0014] Secondly, this application proposes an electrical device that includes the battery pack of the first aspect.
[0015] The technical solution proposed in this application has at least the following technical effects:
[0016] In this application, a groove is formed on the first sealing plane of the frame to fill the sealant, and the sealant abuts against the first cover to achieve a seal. Specifically, when the first cover compresses the sealant, the contact part between the sealant and the first cover will first deform, and secondly, the part of the sealant located in the groove will also deform to fill the groove. This can not only achieve an effective sealing effect, but also avoid the sealant being over-compressed and / or rigidly compressed, preventing it from shrinking and losing elasticity, thereby extending the service life of the sealant and benefiting the long-term sealing effect of the battery and electrical equipment. In addition, the first sealing plane of the frame is provided with a first groove and a second groove at intervals along the first opening, and each is filled with a sealant, thereby achieving a double seal between the frame and the first cover, further enhancing the sealing effect of the battery and electrical equipment. Attached Figure Description
[0017] To better integrate the content illustrated in the accompanying drawings with the description of the specific embodiments, a brief introduction to the drawings is provided below. It is understood that the accompanying drawings mentioned below are merely schematic illustrations of some embodiments of the relevant technical solutions and the technical solutions of this application. Without creative effort, those skilled in the art can create drawings illustrating other embodiments.
[0018] Specifically, the annotations for the accompanying drawings are as follows:
[0019] Figure 1 This is a schematic diagram of the overall structure of the battery pack described in some embodiments of this application;
[0020] Figure 2 This is a schematic diagram of the overall structure of the battery pack described in some embodiments of this application;
[0021] Figure 3 This is a partial cross-sectional schematic diagram of the box body described in some embodiments of this application;
[0022] Figure 4 This is a partial structural schematic diagram of the battery cell array described in some embodiments of this application;
[0023] Figure 5 This is a schematic diagram of the frame structure described in some embodiments of this application;
[0024] Figure 6 This is a schematic diagram of the structure of the lock accessory described in some embodiments of this application.
[0025] Specifically, the annotations for the figure marks in the instruction manual are as follows:
[0026] 100. Battery pack; 110. Housing; 120. Cell assembly; 121. Cell array; 1211. Cell; 111. Frame; 1111. Side beam; 1112. Assembly part; 112. First cover; 113. Second cover; 114. Support plate; H. First opening; P. First sealing plane; C1. First groove; C2. Second groove; W. Seal; S. Lock accessory; S1. Lock attachment post; S2. Gasket; X. First direction; Y. Second direction; Z. Third direction. Detailed Implementation
[0027] To make the embodiments of this application clearer, they will be described below in conjunction with the accompanying drawings. It is to be understood that the content mentioned below is only a partial embodiment of this application, while the complete list of all embodiments is provided. Therefore, other embodiments obtained based on the following embodiments without any inventive effort all fall within the protection scope of this application.
[0028] It should be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to impose strict limitations on the technical solutions unless the context clearly indicates otherwise. For example, the use of "a," "an," and "the" to modify a feature does not preclude the possibility that the feature may be plural in other embodiments.
[0029] It should be understood that the terms "comprising," "including," and "having" are open-ended, indicating the presence of the stated features but not excluding the possibility of other features in the embodiment. Similarly, the use of terms such as "first," "second," etc., to describe multiple features only indicates the distinction between one feature and another, and such terms do not imply order or sequence unless explicitly stated in the context.
[0030] It should be understood that, unless the context clearly indicates otherwise, the terms "setup," "connection," and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a direct connection or an indirect connection via a medium. Those skilled in the art will understand the specific meaning of these terms in this document based on the specific circumstances.
[0031] In addition, for ease of description, the text will use terms of spatial relative relationship to describe the position of one feature relative to another feature, such as "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the spatial relative relationship between two features should include other specific situations besides those shown in the accompanying drawings of the specification.
[0032] The embodiments of this application will now be described with reference to the accompanying drawings.
[0033] Firstly, referring to Figures 1 to 3 This application proposes a battery pack 100, which has a first direction X, a second direction Y, and a third direction Z that intersect each other in pairs. Optionally, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs. Specifically, the battery pack 100 includes a housing 110 and a cell assembly 120. The housing 110 includes a frame 111, a first cover 112, a second cover 113, and a support plate 114. The frame 111 has a first opening H and a second opening on both sides along the third direction Z. The first cover 112 is connected to the frame 111 and covers the first opening H. The second cover 113 is connected to the frame 111 and covers the second opening. The first cover 112, the second cover 113, and the frame 111 enclose a cavity, and the cell assembly 120 is disposed in the cavity.
[0034] Optionally, the frame 111 includes four side beams 1111, which are connected end to end to form a square frame. In some embodiments, the battery cell assembly 120 is neatly arranged to form a square structure that matches the frame 111, making full use of the volume within the cavity and increasing the volumetric energy density of the battery pack 100.
[0035] In some embodiments, refer to Figure 2 The four side beams 1111 include two opposing first side beams 1111 and two opposing second side beams 1111, and the length of the first side beams 1111 is greater than the length of the second side beams 1111. Correspondingly, the cell assembly 120 may include multiple rows of cell columns 121 arranged along the first direction X. Each row of cell columns 121 includes multiple cells 1211 arranged side by side along the second direction Y. The cell 1211 has an adjacent first surface and a second surface, wherein the area of the first surface is greater than the area of the second surface. In particular, the first surface of all cells 1211 faces the first side beam 1111 of the frame 111, and the second surface of all cells 1211 faces the second side beam 1111 of the frame 111. That is to say, the narrow side of the frame 111 is arranged opposite to the narrow surface of the cell 1211, which is a reasonable design and avoids wasting space as much as possible.
[0036] In some embodiments, refer to Figure 3The support plate 114 is a liquid-cooled plate; the frame 111 also includes an assembly part 1112, which is disposed on the inner sidewall of the frame 111 facing the cavity, and the assembly part 1112 protrudes inward relative to the inner sidewall; on the third direction Z of the frame 111, the assembly part 1112 encloses to form a third opening, the axes of the first opening H, the second opening and the third opening are parallel to each other, and the area of the third opening is smaller than the area of the first opening H or the second opening; the support plate 114 connects the assembly part 1112 and covers the third opening, and the support plate 114 is located between the first cover 112 and the second cover 113, and divides the cavity into a first sub-cavity and a second sub-cavity stacked on top of each other; the battery cell assembly 120 is disposed in one of the first sub-cavity and the second sub-cavity, and the support plate 114 abuts against the battery cell assembly 120.
[0037] Understandably, in some embodiments, the support plate 114 may only serve to support the battery cell 1211 in the third direction Z, without providing cooling or heat dissipation. In contrast, the support plate 114 is a liquid-cooled plate, which may have internal channels for fluid medium flow to absorb and transfer the heat emitted by the battery cell 1211, keeping the temperature of the battery pack 100 within a reasonable range. This integrates the support and heat dissipation structures, further improving the space utilization within the battery pack 100. It should be noted that both of the above embodiments fall within the protection scope of this application.
[0038] In some embodiments, the volume of the first sub-cavity is much larger than the volume of the second sub-cavity. The cell assembly 120 is installed inside the first sub-cavity. Optionally, the second sub-cavity can be used to provide heat dissipation for the liquid cooling plate or to house and isolate electrical components and battery pack reinforcement structures.
[0039] In some embodiments, refer to Figure 4 and Figure 5 The frame 111 has a first sealing plane P, which is disposed on the side of the frame 111 facing the first cover 112 and surrounding the first opening H. The first sealing plane P has a first groove C1 and a second groove C2 that are spaced apart. The first groove C1 and the second groove C2 both surround the first opening H, and the second groove C2 is disposed on the side of the first groove C1 away from the cavity. The first groove C1 and the second groove C2 are respectively filled with a sealing element W, and the sealing element W abuts against the first cover 112.
[0040] In some embodiments, the frame 111 further has a second sealing plane, which is disposed on the side of the frame 111 facing the second cover 113 and surrounding the second opening. The second sealing plane has a third groove and a fourth groove that are spaced apart, both surrounding the second opening, and the fourth groove is disposed on the side of the third groove away from the cavity. The third groove and the fourth groove are respectively filled with a sealing member W, and the sealing member W abuts against the second cover 113.
[0041] In some embodiments, the assembly portion 1112 has a third sealing plane, which is disposed on the side of the assembly portion 1112 facing the support plate 114 and surrounding the third opening. The third sealing plane has two grooves spaced apart, both of which surround the third opening, and one of the two grooves is disposed on the outer periphery of the other. The two grooves are respectively filled with a sealing element W, and the sealing element W abuts against the support plate 114.
[0042] Understandably, the groove on the sealing plane and the sealing element W within the groove constitute a sealing structure. In some embodiments, all three sealing planes—the first sealing plane P, the second sealing plane, and the third sealing plane—are provided with the aforementioned sealing structure; or, any one of the three sealing planes—the first sealing plane P, the second sealing plane, and the third sealing plane—is provided with the aforementioned sealing structure; or, any two of the three sealing planes—the first sealing plane P, the second sealing plane, and the third sealing plane—are provided with the aforementioned sealing structure. It should be noted that all three embodiments described above fall within the protection scope of this application.
[0043] Furthermore, it should be understood that the aforementioned sealing structures may not be provided on the first sealing plane P, the second sealing plane, and / or the third sealing plane, but may only be provided on the first cover 112, the second cover 113, and / or the support plate 114; or, the first sealing plane P, the second sealing plane, and / or the third sealing plane, as well as the first cover 112, the second cover 113, and / or the support plate 114, may each be provided with the aforementioned sealing structures. For example, the first sealing plane P of the frame 111 and the first cover 112 may be provided with a first sealing structure and a second sealing structure, respectively. It should be noted that the first sealing structure and the second sealing structure may correspond to each other along the third direction Z, or they may be staggered. In particular, all of the above solutions fall within the protection scope of this application.
[0044] In some embodiments, a deformation space is reserved between the grooves on the three sealing planes and the bottom of the seal W. The seal W is assembled into the groove and deformed by the pressure of the first cover 112, the second cover 113, or the support plate 114 to fill the deformation space. Optionally, the seal W has a cross-section perpendicular to its extension direction, and its cross-section is an inverted trapezoid. The grooves are right-angled grooves, and there is a gap between the bottom of the seal W and the sidewall of the groove to form a deformation space. Optionally, the seal W is made of rubber, foam, or adhesive.
[0045] It should be understood that the seal W is an elastic element with a certain deformation capacity, but it cannot be too loose, which would lead to seal failure. Therefore, the deformation capacity of the seal W should be moderate. Specifically, the seal W is not limited to rubber, foam, and sealant. Its cross-sectional shape can be an inverted trapezoid, a semi-circle, a semi-ellipse, etc. Correspondingly, the groove can also be a rounded groove. As long as the inner wall of the groove and the seal W are provided with deformation space, it is within the protection scope of this application.
[0046] In the above embodiment, the sealing plane of the frame 111 has a groove for filling the sealing element W. The sealing element W abuts against the first cover 112, the second cover 113, or the support plate 114 to achieve a seal. Specifically, when the first cover 112, the second cover 113, or the support plate 114 compresses the sealing element W, the contact portion of the sealing element W with the first cover 112, the second cover 113, or the support plate 114 will first deform. Secondly, the portion of the sealing element W located in the groove will also deform to fill the groove. This can not only achieve an effective sealing effect, but also prevent the sealing element W from being over-compressed and / or rigidly compressed, preventing it from shrinking and losing elasticity, thereby extending the service life of the sealing element W and contributing to the long-term sealing effect of the battery and electrical equipment. In addition, the sealing plane of the frame 111 has two grooves, each filled with the sealing element W, thereby achieving a double seal of the cavity and further enhancing the sealing effect of the battery and electrical equipment.
[0047] Specifically, the first cover 112, the second cover 113, and the support plate 114 are respectively sealed to the frame 111 to form a multi-seal structure, which improves the sealing effect of the battery and the electrical equipment. Moreover, this application concentrates multiple sealing functions on the side beam 1111 of the frame 111, which can improve the overall integration and increase the space utilization rate while meeting the relevant sealing requirements.
[0048] In some embodiments, on the third direction Z of the frame 111, the seal W has a protrusion relative to the sealing plane. The first cover 112, the second cover 113, or the support plate 114 are assembled with the frame 111 and abut against the protrusion; optionally, the cross-section of the protrusion perpendicular to its extending direction is arc-shaped or right-angled. In some embodiments, refer to... Figure 4 and Figure 6 Multiple locking attachments S are spaced apart between two adjacent grooves along the sealing plane. The locking attachments S lock the first cover 112, the second cover 113, or the support plate 114 to the frame 111. Optionally, the locking attachment S includes a locking post S1 and a gasket S2. The locking post passes through the first cover 112, the second cover 113, or the support plate 114 to the frame 111 along a third direction Z. The gasket S2 is located between the first cover 112, the second cover 113, or the support plate 114 and the frame 111. Optionally, the assembly part 1112 has a weight-reducing cavity. The support plate 114 is assembled to the assembly part 1112 via the locking attachments S, and part of the structure of the locking attachments S is housed in the weight-reducing cavity.
[0049] It should be noted that before the first cover 112, the second cover 113 or the support plate 114 are assembled with the frame 111, the sealing element W has a protruding part relative to the sealing plane; after assembly, the protruding part is flattened, causing the sealing element W to shrink into the deformation space in the groove, so as to achieve the fit and seal between the first cover 112, the second cover 113 or the support plate 114 and the sealing plane; in particular, after the protruding part is pressed, it generally will not be lower than the sealing plane, and its lowest state is flush with the sealing plane.
[0050] In the above embodiments, the cross-sectional shape of the weight-reducing cavity of the assembly part 1112 can be rectangular, square, trapezoidal, circular, etc. Optionally, the inward protrusion dimension of the assembly part 1112 is d, where d satisfies 10mm≤d≤60mm. Specifically, on the one hand, the inward protrusion dimension of the assembly part 1112 cannot be too small, otherwise it will cause difficulties in assembling it with the support plate 114, and the cavity on it will not be able to achieve the weight-reducing effect, and the cavity cannot accommodate the lock accessory S. On the other hand, the inward protrusion dimension of the assembly part 1112 cannot be too large, otherwise it will occupy too much space in the battery pack 100, and may even interfere with other components. Therefore, the inward protrusion dimension of the assembly part 1112 should be moderate. For example, the inward protrusion dimension d of the assembly part 1112 can be any one of 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, or a range between any two of these values.
[0051] It should be noted that the weight-reducing cavity not only reduces weight but also accommodates the lock accessory S, increasing space utilization. The lock accessory S enhances the structural connection's robustness and, in conjunction with the sealing element W, improves the sealing effect. The gasket S2 of the lock accessory S prevents the first cover 112, the second cover 113, or the support plate 114 from completely fitting against the frame 111, which would affect the sealing effect of the sealing element W. If the two surfaces are initially pressed together, the subsequent sealing effect cannot be guaranteed. By providing a certain amount of redundant space through the gasket S2, the sealing element W can better fill the gap under its own elasticity, forming an isolation sealing effect.
[0052] Secondly, this application proposes an electrical device that includes the battery pack 100 of the first aspect.
[0053] In the above embodiments, the power-consuming device of the second aspect includes the battery pack 100 of the first aspect. Therefore, the power-consuming device of the second aspect has at least all the technical effects of the battery pack 100 of the first aspect, and its specific technical effects will not be described in detail here.
[0054] The embodiments of this application only illustrate the structure of the electrical equipment related to the improvement points of this application in the second aspect, but it does not mean that it does not have other structures. For example, the electrical equipment also includes a battery charging and discharging protection system, a battery auxiliary heat dissipation system, etc. Other structures will not be described one by one here.
[0055] In particular, the term "and / or" in this application should be understood as follows:
[0056] In the first case, the term “and / or” located between the first subject and the second subject includes any of the following meanings: (1) only the first subject; (2) only the second subject; and (3) both the first subject and the second subject.
[0057] In the second case, the term "and / or" between the last two of three or more subjects means including at least any one of the subjects. For example, "first subject, second subject and / or third subject" has the same meaning as "first subject and / or second subject and / or third subject", specifically including the following combinations: (1) only the first subject; (2) only the second subject; (3) only the third subject; (4) the first subject and the second subject and no third subject; (5) the first subject and the third subject and no second subject; (6) the second subject and the third subject and no first subject; and (7) the first subject, the second subject and the third subject.
[0058] In addition, the character " / " in this application generally indicates that the objects before and after it are in an "or" relationship.
[0059] In particular, although the embodiments of this application have been described above in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the concept of this application, and such modifications and variations all fall within the scope of protection of this application.
Claims
1. A battery pack having a third orientation (Z), characterized in that, include: The box (110) includes a first cover (112) and a frame (111). The frame (111) has a first opening (H) on one side along a third direction (Z). The first cover (112) connects to the frame (111) and covers the first opening (H). The first cover (112) and the frame (111) form a cavity. The frame (111) has a first sealing plane (P), which is disposed on the side of the frame (111) facing the first cover (112) and surrounds the first opening (H). The first sealing plane (P) has a first groove (C1) and a second groove (C2) spaced apart. Both the first groove (C1) and the second groove (C2) surround the first opening (H), and the second groove (C2) is disposed around the periphery of the first groove (C1). A sealing element (W) is provided in the first groove (C1) and the second groove (C2), and the sealing element (W) abuts against the first cover (112). The battery cell assembly (120) includes a plurality of battery cells (1211), all of which are disposed within the cavity.
2. The battery pack according to claim 1, characterized in that, A deformation space is reserved between the first groove (C1) and / or the second groove (C2) and the seal (W). The seal (W) is assembled into the first groove (C1) and / or the second groove (C2) and is deformed by the first cover (112) to fill the deformation space.
3. The battery pack according to claim 2, characterized in that, The seal (W) has an extension direction along the circumference of the first opening (H) and a cross section perpendicular to the extension direction, and the cross section is trapezoidal; the first groove (C1) and / or the second groove (C2) are right-angled grooves, and there is a gap between the seal (W) and the sidewalls of the first groove (C1) and / or the second groove (C2) to form the deformation space.
4. The battery pack according to claim 1, characterized in that, On the third direction (Z), the seal (W) has a protruding portion relative to the first sealing plane (P), and the first cover (112) is fitted to the frame (111) and abuts against the protruding portion.
5. The battery pack according to claim 4, characterized in that, The cross-section of the protruding portion is arc-shaped or right-angled.
6. The battery pack according to any one of claims 1 to 5, characterized in that, A plurality of locking attachments (S) are provided between the first groove (C1) and the second groove (C2). The plurality of locking attachments (S) are spaced apart along the extension direction of the first sealing plane (P). The locking attachments (S) lock the first cover (112) and the frame (111).
7. The battery pack according to claim 6, characterized in that, The lock accessory (S) includes a locking post (S1) and a washer (S2). The locking post (S1) passes through the first cover (112) and the frame (111) along the third direction (Z). The washer (S2) is sleeved on the locking post (S1) and located between the first cover (112) and the frame (111).
8. The battery pack according to claim 1, characterized in that, The housing (110) further includes a second cover (113), and the frame (111) has a second opening on the side opposite to the first cover (112) along a third direction (Z). The second cover (113) is connected to the frame (111) and covers the second opening. The first cover (112), the second cover (113) and the frame (111) enclose the cavity. The frame (111) also has a second sealing plane, which is disposed on the side of the frame (111) facing the second cover (113) and surrounding the second opening. The second sealing plane has a third groove and a fourth groove that are spaced apart. The third groove and the fourth groove both surround the second opening, and the fourth groove is disposed on the periphery of the third groove. A sealing element (W) is provided in the third groove and the fourth groove respectively, and the sealing element (W) abuts against the second cover (113).
9. The battery pack according to claim 8, characterized in that, The enclosure (110) also includes a liquid cooling plate; The frame (111) also has an assembly part (1112), which is disposed on the inner sidewall of the frame (111) facing the cavity, and the assembly part (1112) protrudes inward relative to the inner sidewall; in the third direction (Z) of the frame (111), the assembly part (1112) encloses to form a third opening, the axes of the first opening (H), the second opening and the third opening are parallel to each other, and the area of the third opening is smaller than the area of the first opening (H) or the second opening; The liquid cooling plate connects to the assembly part (1112) and covers the third opening, and the liquid cooling plate is located between the first cover (112) and the second cover (113); The assembly part (1112) has a third sealing plane, which is disposed on the side of the assembly part (1112) facing the liquid cooling plate and surrounding the third opening. The third sealing plane has two grooves spaced apart, both of which surround the third opening, and one of the two grooves is disposed on the outer periphery of the other. The two grooves are respectively filled with a sealing element (W), and the sealing element (W) abuts against the liquid cooling plate.
10. An electrical appliance, characterized in that, Includes the battery pack (100) as described in any one of claims 1 to 9.