A battery module upper cover and a battery case

Abstract

The utility model discloses a battery module upper cover, including the cover body, the cover body includes power supply orientation surface and outside, power supply orientation surface and outside opposite setting, and the cover body forms a plurality of recessed containing space along the direction perpendicular to power supply orientation surface and outside, and a plurality of containing space distributes on power supply orientation surface and outside, along power supply orientation surface and outside and parallel to power supply orientation surface and outside any plane in at least one direction, the projection of a plurality of containing spaces all or part coincides, the above setting mode has effectively reduced the overall thickness of battery module upper cover, and then in the battery shell with strict size limit, for the installation of the battery cell group has reserved greater space, is favorable for the compactness of promotion battery module's structure and capacity.

Description

Technical Field

[0001] This utility model belongs to the field of battery module technology, specifically, it relates to a battery module cover and battery casing. Background Technology

[0002] With urbanization, electric two-wheelers have gradually become the primary choice for short-distance urban transportation due to their high flexibility and low cost.

[0003] Currently, electric two-wheelers typically have the battery compartment located under the seat, with the seat serving as the cover. This places strict requirements on the size of the onboard battery module. Within these dimensions, increasing battery capacity relies on two main approaches: firstly, upgrading battery materials. However, innovation in battery materials often requires a long development cycle, and changes in materials also involve cost fluctuations, making large-scale replacement and application difficult in the short term; secondly, improving the structure. Through scientific design of the battery module structure, space utilization can be improved, and the energy density of the battery module can be increased. Compared to the former, structural improvements have a shorter development cycle, lower replacement and application costs, and are more likely to achieve increased battery capacity in a shorter period. Therefore, improving the structural regularity of the battery module itself and reducing the space occupied by non-cell areas has become an urgent problem to be solved.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] In order to solve one of the problems in the prior art, this utility model provides a battery module cover. By improving the cover structure, the handle and interface are embedded, so that the top of the battery module cover can basically form a plane, which is beneficial to increasing the size of the battery cells in the battery module.

[0006] This invention also provides a battery case using the battery module cover.

[0007] Therefore, the first aspect of this utility model provides a battery module cover, including a cover body, the cover body including a power-facing surface and an outer surface, the power-facing surface and the outer surface are arranged opposite to each other, and the cover body forms a plurality of recessed receiving spaces along a direction perpendicular to the power-facing surface and the outer surface, the plurality of receiving spaces being distributed on the power-facing surface and the outer surface; along at least one direction in any plane parallel to the power-facing surface and the outer surface, the projections of the plurality of receiving spaces are all or partially overlapping.

[0008] Furthermore, the cover includes a handle area and an interface area arranged side by side along a preset first direction. The accommodating space includes a wiring space for accommodating internal wiring and a reserved space for accommodating external wiring, formed in the interface area and arranged along a preset second direction. The reserved space is formed on the power-facing surface, and the wiring space is formed on the outer surface.

[0009] Furthermore, the wiring space and the reserved space at least partially overlap in projection in the preset second direction, have a common sidewall, and the battery module cover also includes an interface component disposed on the common sidewall.

[0010] Furthermore, it also includes a handle assembly disposed in the handle area, and the receiving space includes a mounting groove formed on the outer surface of the handle area, in which the handle assembly is embedded and installed.

[0011] Furthermore, the handle assembly includes a handle and a connector, the handle assembly is connected to the connector, the connector is detachably connected to the mounting groove, and the handle is detachably connected to the cover via the connector.

[0012] Furthermore, the connector is embedded in and covers the mounting groove, forming a cavity between the two.

[0013] Furthermore, the handle is hinged to the connector and is rotatable about the hinge point in a plane perpendicular to the cover. The accommodating space also includes a handle groove formed on the outer surface of the handle area for accommodating the handle.

[0014] Preferably, when the handle assembly is installed in place, the rotation axis of the handle is perpendicular to a preset first direction, the handle groove is connected to the mounting groove, and is biased towards the side of the mounting groove away from the handle area along the preset first direction.

[0015] Furthermore, the handle is C-shaped and forms a gap between itself and the connector when it is accommodated in the handle groove, with a limiting protrusion at the gap.

[0016] Furthermore, the accommodating space also includes a guide groove located in the handle area. The guide groove is located on the side of the handle groove away from the interface area along a preset first direction, and the guide groove is connected to the handle groove.

[0017] Preferably, the depth of the guide groove is greater than the depth of the handle groove, and part of the guide groove overlaps with the handle groove.

[0018] Furthermore, it also includes at least three peripheral walls that protrude at an angle along the periphery of the cover and at the power supply facing surface and the outer surface, with adjacent peripheral walls connected to the cover by connecting walls.

[0019] Preferably, the connecting wall is an isosceles triangle, with its base connected to the cover and its two sides connected to the two side walls respectively.

[0020] Preferably, the connecting wall is set as an arc surface, which smoothly transitions and connects with the cover and the peripheral wall.

[0021] Furthermore, the cover also has a pressure balance hole that runs through the cover, connecting both sides and allowing only gas communication.

[0022] Preferably, an opening for installing the interface assembly is provided on the side wall shared by the wiring space and the reserved space. The opening is located in the middle of the shared side wall, and the interface assembly protrudes into the wiring space, with a gap between it and the bottom surface of the wiring space. The air pressure balance hole is located on the bottom surface of the wiring space, below the protruding part of the interface assembly.

[0023] The second aspect of this utility model provides a battery casing, including a housing and a battery module cover as described above. The housing has a top opening, and the power-facing side of the battery module cover faces the inside of the housing, covering the top opening of the housing and being detachably connected to the housing.

[0024] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0025] 1. The accommodating space formed on the power-facing surface and the outer surface of the cover has its projections in at least one direction along the power-facing surface and the outer surface and in any plane parallel to the power-facing surface and the outer surface, which fully or partially overlaps. This effectively reduces the thickness of the battery module cover and provides more space for the installation of the battery cell pack when the battery case size is fixed, which is beneficial for battery capacity expansion.

[0026] 2. The interface area is provided with wiring space and reserved space along the preset second direction, forming a stepped structure on the outer surface. The wiring space provides ample space for the connectors that mate with the interface components, effectively preventing the connectors from protruding. To increase the capacity of the battery module, the thickness of the top cover in the vertical direction needs to be reduced. However, the vertical setting of the interface components is obviously not conducive to reducing the thickness of the top cover. By forming an opening for installing the interface components on the side wall shared by the wiring space and reserved space, the connectors are restricted to being inserted in the horizontal direction, which can better prevent the connectors from protruding from the top of the battery module top cover and effectively increase the capacity of the battery case. Furthermore, the horizontal insertion method is less likely to fall off under the action of bumps and vibrations, which improves the stability of the electrical connection to a certain extent.

[0027] 3. An air pressure balance hole is set at the bottom of the wiring space. The air pressure balance hole can allow the air inside and outside the battery case to flow while blocking the flow of liquid, ensuring that the air pressure inside and outside the battery case is consistent. The battery case will not deform due to pressure difference, so there is no need to thicken the battery case or set additional reinforcing ribs, which further improves the installation space of the battery cell.

[0028] 4. The handle assembly is embedded on the outer surface of the battery module cover, effectively reducing the overall thickness of the battery module cover. The handle assembly is detachably connected to the cover, facilitating replacement and maintenance and reducing maintenance costs. The handle assembly includes a handle and a connector. The accommodating space on the battery module cover includes a mounting slot and a handle slot, with a limiting protrusion between them. This ensures the shape of the accommodating space on the battery module cover fully matches the shape of the handle assembly, reducing the depth of the accommodating space and improving its precision. Furthermore, the limiting protrusion not only facilitates precise handle installation but also enhances the strength of the mounting slot and handle slot on the battery module cover. The guide slot is deeper than the handle slot, allowing users to more easily remove the handle from the handle slot, improving operational convenience. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a structure of the battery module cover with the handle assembly removed according to the present invention;

[0030] Figure 2 yes Figure 1 An enlarged view of point C in the top cover of the battery module shown;

[0031] Figure 3 yes Figure 1 The diagram shows a structural schematic of a battery module cover mounting handle assembly.

[0032] Figure 4 yes Figure 1 A top view of the battery module cover shown;

[0033] Figure 5 yes Figure 1 The image shows a front view of the battery module's top cover.

[0034] Figure 6 yes Figure 3 A cross-sectional view of the middle part of the upper cover of the battery module shown along a predetermined second direction;

[0035] Figure 7 yes Figure 3 The image shows a cross-sectional view of the interface area in the middle of the battery module's top cover after removing the interface components, along a preset first direction.

[0036] Figure 8 This is a schematic diagram of one structure of the battery casing described in this utility model.

[0037] In the diagram: 1. Cover; 11. Mounting groove; 12. Handle groove; 13. Limiting protrusion; 14. Guide groove; 15. Stepped plane; 16. Air pressure balance hole; 17. Wiring space; 18. Reserved space; 2. Peripheral wall; 3. Connecting wall; 4. Handle assembly; 41. Handle; 42. Connector; 5. Interface assembly; 6. Housing; A. Handle area; B. Interface area. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0039] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] This utility model provides a battery module cover, such as Figures 1 to 7 As shown, the device includes a cover 1, with a power-facing side and an outer side on opposite sides. Several receiving spaces are formed by recesses on the power-facing side and the outer side in directions perpendicular to the two sides. The projections of the several receiving spaces all or partially overlap along at least one direction in any plane parallel to the power-facing side and the outer side. This arrangement reduces the thickness of the cover 1, thereby reserving more installation space for the battery cell assembly within the limited battery case size.

[0042] In one embodiment of this utility model, the battery module cover only includes the cover body 1. In other embodiments, the battery module cover also includes a peripheral wall 2 that protrudes at an angle to the power-facing surface and the outer surface along the periphery of the cover body 1. The shape of the peripheral wall 2 is changed according to the shape of the cover body 1. For example, when the cover body 1 is circular, the peripheral wall 2 is correspondingly annular; when the cover body 1 is rectangular, the peripheral wall 2 is correspondingly square annular. The cover body 1 can be manufactured by conventional methods in the art such as integral molding, stamping, welding, splicing, and bonding. For a battery module cover including the peripheral wall 2, the peripheral wall 2 and the cover body 1 can also be integrally molded, stamped, welded, or bonded, or set as two detachable independent structures as needed.

[0043] The cover 1 includes a handle area A and an interface area B divided along a preset first direction. The preset first direction is any direction along the power-facing surface and the outer surface, or any direction parallel to the power-facing surface and the outer surface. At least a portion of the accommodating space is formed in the interface area B and the handle area A. The battery module cover also includes a handle assembly 4 and an interface assembly 5 disposed on the cover 1. To prevent them from protruding from the cover 1, at least a portion of the accommodating space on the battery module cover is distributed in the handle area A and the interface area B, respectively accommodating the handle assembly 4 and the interface assembly 5, thereby ensuring the regularity of the battery casing's appearance and improving the size of the internal space of the battery casing. As one embodiment, the accommodating space includes a mounting groove 11 on the outer surface of the handle area A, through which the handle assembly 4 is detachably connected to the cover 1. It also includes a wiring harness disposed on the outer surface of the interface area B. The wiring space 17 and the reserved space 18 are located on the power-facing surface of the interface area B. To avoid interference between the interface area B and the handle area A, the wiring space 17 and the reserved space 18 are arranged sequentially along a preset second direction. The preset second direction is another direction that intersects the preset first direction along the power-facing surface and the outer side surface, and any plane parallel to the power-facing surface and the outer side surface. Thus, a stepped structure is formed in the interface area B along the preset second direction. The stepped structure uses the bottom wall of the wiring space 17 as a stepped plane 15 and the side wall shared by the wiring space 17 and the reserved space 18 as the connecting surface connecting the two steps. The interface component 5 is set on the connecting surface. In the specific embodiments of this utility model, unless otherwise specified, the preset first direction and the preset second direction are assumed to be perpendicular to each other. In other embodiments, the two can also form an acute angle or an obtuse angle, but they cannot be parallel to each other.

[0044] Furthermore, the handle assembly 4 can also be integrally formed with the cover 1, or it can be detachably connected to the cover 1 as an independent structure; although the interface assembly 5 can also be integrally formed on the cover 1, in order to avoid separate molding for cover 1s using different interface assemblies 5, the interface assembly 5 is preferably detachably connected to the cover 1 as an independent structure; as one embodiment of this utility model, an opening is provided on the connecting surface, the opening connecting the wiring space 17 and the reserved space 18, and the interface assembly 5 is fixedly or detachably disposed in the opening, partly protruding into the wiring space 17 and the other part protruding into the reserved space 18; in other embodiments, the interface assembly 5 can also be entirely disposed in the reserved space 18, with the interface only formed at the opening of the connecting surface; or it can all protrude into the wiring space 17, in which case the opening on the connecting surface is used for The interface component 5 is fixed and facilitates wiring of the interface component 5. The above arrangement places the interface component 5 on the connection surface, restricting the insertion direction of the connector and avoiding the connector or connector wiring from protruding from the cover 1 due to vertical insertion. Moreover, the setting direction of the interface component 5 is parallel to the handle component 4, so the installation and wiring of the interface component 5 will not be affected by the handle component 4, which can further reduce the thickness of the battery module cover. The height difference between the stepped plane 15 and the outer side of the cover 1 in the stepped structure can be designed according to the actual situation, as long as it can fully accommodate the connector that mates with the interface component 5. The preferred ratio of the height difference to the thickness of the battery module cover is 2:3 to 5:6. In addition, in order to maintain the balance when extracting the battery through the handle 41, the handle component 4 is preferably centered in the middle of the battery module cover.

[0045] In the above scheme, the area of ​​the handle area and the interface area B can be adjusted according to actual needs. In other embodiments, the cover 1 can also be provided with other areas along a preset direction. The other areas can be provided on the side of the handle area away from the interface area B, and / or on the side of the interface area B away from the handle area, and / or between the interface area B and the handle area.

[0046] The battery casing using the above-mentioned battery module cover is as follows: Figure 8 As shown, it also includes a housing 6 with an opening at the top for accommodating the battery cell assembly. The battery module cover is detachably connected to the housing 6. When the two are connected, the power-facing side of the cover 1 faces the inside of the housing 6 and is fastened to the opening to cooperate with the housing 6 to form a battery case. Since the battery module cover has a lower thickness, under the limited battery compartment size, there is more space inside the battery case to accommodate the battery cell assembly, thereby increasing the capacity of the battery module.

[0047] It should be noted that the shape of the battery module cover is adapted to the housing 6. In the following embodiments, unless otherwise specified, the battery shell is assumed to be a hollow quadrangular prism structure. In other embodiments, the shape of the battery shell can also be set as cylindrical, triangular prism or other shapes, and the shape of the battery module cover is adaptively adjusted according to the shape of the battery shell.

[0048] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings.

[0049] Example 1

[0050] As an embodiment of the present invention, this embodiment provides a battery module cover, which has only a handle area A and an interface area B distributed along a preset first direction, and is provided with a detachable handle assembly 4.

[0051] In this embodiment, as Figure 1 , Figure 3 and Figure 4 As shown, the handle assembly 4 includes a handle 41 and a connector 42. The handle assembly 4 is connected to the connector 42, which is embedded in the mounting groove 11 and connected to the battery module cover by screws. To prevent the handle 41 from protruding from the battery module cover, the handle 41 is rotatably configured relative to the connector 42, and thus rotatably configured relative to the connector 42 with the axis of the hinge hole as the pivot.

[0052] In one embodiment, the connector 42 has hinge holes on opposite sides. The handle assembly 4 is C-shaped and is hinged to the connector 42 through two hinge holes. The width of the handle 41 along the rotation axis is greater than the width of the connector 42, and the handle 41 can rotate to the side of the connector 42, so that it is in the same plane as the connector 42. For this purpose, a handle groove 12 for accommodating the handle 41 is also provided on the outer side of the cover 1. The handle groove 12 can fully accommodate the handle 41 and prevent it from being blocked by the mounting groove 11 and protruding from the outer side of the cover 1. In other embodiments, considering that the handle 41 may interfere with the interface area B, when the handle assembly 4 is installed on the cover 1, the rotation axis of the handle 41 is set along a preset second direction, and the handle groove 12 is set on the side of the mounting groove 11 away from the interface area B. This not only fully accommodates the handle 41, but also serves as a mark for storing the handle 41, preventing damage to the handle 41 and the battery module cover due to user misoperation.

[0053] To better separate the mounting groove 11 and the handle groove 12, a limiting protrusion 13 is provided between the handle groove 12 and the mounting groove 11. The limiting protrusion 13 is located on the side of the mounting groove 11 close to the handle groove 12 along a preset first direction. When the handle 41 rotates and is accommodated in the handle groove 12, the limiting protrusion 13 is located in the gap between the handle 41 and the connector 42. By separating the handle groove 12 and the mounting groove 11 through the limiting protrusion 13, the installation of the connector 42 can be better limited, avoiding improper installation that would prevent the handle 41 from being properly accommodated in the handle groove 12. Furthermore, the setting of the limiting protrusion 13 can also improve the overall shape of the battery module cover. Body strength; In this embodiment, the top of the limiting protrusion 13 protrudes from the handle groove 12 and the mounting groove 11, but does not protrude from the outer side of the cover 1; In other embodiments, the top of the limiting protrusion 13 may be flush with the outer wall, and a limiting protrusion may be provided on the side of the limiting protrusion 13 facing the handle to restrict the free rotation of the handle 41; Alternatively, by increasing the thickness of the limiting protrusion 13, the handle 41 may come into contact with the limiting protrusion 13 during the process of rotating into the handle groove 12, thereby increasing the friction to prevent the handle 41 from rotating arbitrarily and effectively preventing the handle 41 from dislodging from the handle groove 12 when vibrating or accidentally touched.

[0054] Furthermore, to facilitate user operation, a guide groove 14 is provided on the outer side of the cover 1. The guide groove 14 is located on the side of the handle groove 12 away from the interface area B and communicates with the handle groove 12, so that the user can more easily take the handle 41 through the guide groove 14. As one embodiment of this example, the depth of the guide groove 14 is greater than that of the handle groove 12, and it extends to the handle groove 12 and communicates with the handle groove 12, making it more convenient for the user to take the handle 41.

[0055] Example 2

[0056] As another embodiment of the present invention, this embodiment makes the following improvements based on embodiment one.

[0057] In this embodiment, as Figure 6 As shown, the connector 42 has a downward-opening "U" shape in its cross-section perpendicular to the preset second direction, and baffles adapted to the "U" shape are provided at both ends in the preset second direction. When the connector 42 is engaged with the mounting groove 11, it will not completely fill the space where the mounting groove 11 is located, but will form a cavity between the bottom wall of the mounting groove 11 and the connector 42. The cavity can be used to install battery module components such as antennas, GPS, and circuit boards. By transferring the components that were originally installed inside the battery case to the cavity, the space utilization rate of the battery module cover is improved, further saving the space inside the battery case and reserving more installation space for the battery cell assembly. In other embodiments, other components can also be set in the cavity according to the actual situation.

[0058] Furthermore, based on the structure of the connector 42, hinge holes with opposite positions are provided on the two side baffles, and the handle 41 is in the shape of a "C". It is hinged to the connector 42 through the hinge holes on both sides. In other embodiments, the structure and shape of the connector 42 can also be adjusted and changed according to the actual situation. The solution obtained after making conventional changes to the structure of the connector 42 and the hinge method of the handle 41 also falls within the protection scope of this utility model.

[0059] Example 3

[0060] As another embodiment of the present invention, this embodiment is further improved on the basis of embodiment two as follows.

[0061] In this embodiment, as Figure 4 , Figure 5 and Figure 7 As shown, the wiring space 17 located in interface area B is a notch with a stepped plane 15 as its base. The top of the notch, the side opposite to the connection surface, and the side away from handle area A are open. This arrangement provides a more sufficient installation area for the connector, facilitating user installation and operation. Specifically, the opening for installing interface component 5 is located in the middle of the connection surface. After the interface component 5 is installed, part of it extends through the opening into the wiring space 17 and is spaced apart from the stepped plane 15. The other part is accommodated in the reserved space 18 for internal wiring. The cover 1 is also provided with a pressure balance hole 16 that connects the two sides of the battery module cover and allows only gas communication. As a specific implementation of this embodiment, as... Figure 2 As shown, the air pressure balancing hole 16 is located on the stepped plane 15 near the connection surface, below the portion of the interface component 5 that extends into the wiring space 17. This arrangement achieves air pressure balance inside and outside the battery module while placing the air pressure balancing hole 16 in a relatively concealed position that is covered by the interface component 5, thus improving the visual integrity and aesthetics of the battery module cover. Furthermore, since there is a gap between the interface component 5 and the stepped plane 15, the air pressure balancing hole 16 is not affected by the connector insertion.

[0062] As one specific implementation of this embodiment, the side of the pressure balance hole 16 facing the inside of the battery module cover is provided with a molecular membrane that only allows gas to pass through. The pressure balance hole 16 achieves the balance of air pressure inside and outside the battery case, avoiding deformation of the battery case due to the difference in air pressure inside and outside. This reduces the need for reinforcing ribs in the battery module cover and housing 6 to increase strength, and further increases the installation space of the battery cell assembly. In other embodiments, the pressure balance hole 16 can also be set as a one-way valve that can achieve the same or similar functions.

[0063] Example 4

[0064] As another embodiment of the present invention, this embodiment is further improved on the basis of embodiment three as follows.

[0065] In this embodiment, as Figures 1 to 4 As shown, the battery module cover includes a cover body 1 and four peripheral walls 2 protruding to one side perpendicular to the cover body 1 along the periphery of the cover body 1. It also includes connecting walls 3 connecting adjacent peripheral walls 2 and the cover body 1. Specifically, in this embodiment, the battery module cover includes four connecting walls 3, three of which are respectively located at the three corners where no notch is formed, and the fourth is located at the corner of the handle area A adjacent to the notch. The connecting wall 3 is generally arranged in an isosceles triangle, with its base connected to the cover body 1 and its two sides connected to the adjacent two peripheral walls 2. By setting the connecting wall 3, the sharp structure formed at the connection between the cover body 1 and the two adjacent peripheral walls 2 is avoided, which improves the strength and structural stability of the battery module cover. As a specific implementation of this embodiment, the connecting wall 3 is set as an arc surface that arches outward from the battery module cover, and the connecting wall 3 is smoothly connected to the cover body 1 and the peripheral walls 2.

[0066] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A battery module upper cover, characterized by, The cover (1) includes a power-facing surface and an outer surface, which are arranged opposite to each other. The cover (1) forms a plurality of recessed receiving spaces along a direction perpendicular to the power-facing surface and the outer surface. The plurality of receiving spaces are distributed on the power-facing surface and the outer surface. The projections of the plurality of receiving spaces overlap in all or part of a direction along the power-facing surface and the outer surface and in at least one direction in any plane parallel to the power-facing surface and the outer surface.

2. The battery module upper cover of claim 1, wherein, The cover (1) includes a handle area and an interface area arranged side by side along a preset first direction. The accommodating space includes a wiring space (17) for accommodating internal wiring and a reserved space (18) for accommodating external wiring, which are formed in the interface area and arranged along a preset second direction. The reserved space (18) is formed on the power-facing surface, and the wiring space (17) is formed on the outer surface.

3. The battery module upper cover of claim 2, wherein, The wiring space (17) and the reserved space (18) at least partially overlap in the projection of the preset second direction and have a common sidewall. The battery module cover also includes an interface component (5) which is disposed on the common sidewall.

4. The battery module upper cover of claim 1, wherein, It also includes a handle assembly (4), which is disposed in the handle area and has a receiving space including a mounting groove (11) formed on the outer side of the handle area, and the handle assembly (4) is embedded in the mounting groove (11).

5. The battery module upper cover of claim 4, wherein, The handle assembly (4) includes a handle (41) and a connector (42). The handle assembly (4) is connected to the connector (42), the connector (42) is detachably connected to the mounting groove (11), and the handle (41) is detachably connected to the cover (1) through the connector (42).

6. The battery module upper cover of claim 5, wherein, The connector (42) is embedded in and covers the mounting groove (11), forming a cavity between them.

7. The battery module upper cover of claim 4, wherein, The handle (41) is hinged to the connector (42) and is rotatable about the hinge in a plane perpendicular to the cover (1). The accommodating space also includes a handle groove (12) formed on the outer surface of the handle area for accommodating the handle. When the handle assembly (4) is installed in place, the rotation axis of the handle (41) is perpendicular to the preset first direction, the handle groove (12) is connected to the mounting groove (11), and is set on the side away from the handle area along the preset first direction of the mounting groove (11).

8. The battery module upper cover of claim 7, wherein, The handle (41) is C-shaped and is fitted into the handle groove (12), forming a gap with the connector (42). A limiting protrusion (13) is provided at the gap.

9. The battery module upper cover of claim 7, wherein, The accommodating space also includes a guide groove (14) located in the handle area. The guide groove (14) is located on the side of the handle groove (12) away from the interface area along a preset first direction, and the guide groove (14) is connected to the handle groove (12).

10. The battery module upper cover of claim 9, wherein, The depth of the guide groove (14) is greater than the depth of the handle groove (12), and part of the guide groove (14) overlaps with the handle groove (12).

11. The battery module upper cover of claim 1, wherein, It also includes a connecting wall (3) and at least three peripheral walls (2) that are arranged along the periphery of the cover (1) and protrude at an angle to the power supply facing surface and the outer side surface. The connecting wall (3) is located at the corner formed by two adjacent peripheral walls (2) and is connected to the two peripheral walls (2) and the cover (1) respectively. The connecting wall (3) is set as an arc surface and smoothly transitions to the cover (1) and the peripheral walls (2).

12. The battery module upper cover of claim 11, wherein, The connecting wall (3) is an isosceles triangle with its base connected to the cover (1) and its two sides connected to the two side walls (2).

13. The battery module upper cover of any one of claims 1-12, wherein, The cover (1) also has a pressure balance hole (16) that is provided through to connect the two sides of the cover (1) and can only enable gas communication.

14. The battery module upper cover of claim 13, wherein, An opening for installing an interface assembly is provided on the side wall shared by the wiring space (17) and the reserved space (18). The opening is located in the middle of the shared side wall. The interface assembly (5) protrudes into the wiring space (17) and is spaced apart from the bottom surface of the wiring space (17). The air pressure balance hole (16) is located on the bottom surface of the wiring space (17) and below the protruding part of the interface assembly (5).

15. A battery case characterized by comprising: Includes a housing (6) and a battery module cover as described in any one of claims 1-14, with a top opening of the housing (6), the power facing surface of the battery module cover facing the interior of the housing (6), and the top opening of the housing (6) being detachably connected to the housing (6).

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