Upper cover assembly and battery box

Abstract

The utility model relates to the technical field of batteries, and provides an upper cover assembly and a battery box. The upper cover assembly comprises a cover body, a connecting flange, an access cover plate and a connecting piece, and the cover body is provided with an access hole; the connecting flange is installed on the cover body, the connecting flange is arranged around the access hole, the connecting flange is integrally provided with a plurality of fasteners, the fasteners are distributed around the access hole at intervals, and the tail ends of the fasteners are provided with threads; the access cover plate covers the access hole and is provided with connecting through holes in one-to-one correspondence with the fasteners, and the tail ends of the fasteners penetrate through the connecting through holes; the connecting piece is detachably connected to the tail end of the fastening piece. Wherein the connecting flange is integrally provided with a fastener, the connecting flange and the cover body do not need to be provided with mounting hole sites for mounting the fastener, the access cover plate is detachably pressed and fixed to the connecting flange through the connecting piece, the sealing ring located between the access cover plate and the cover body is compressed, and the sealing protection grade of the upper cover assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an upper cover assembly and a battery box. Background Art

[0002] The battery box's top cover is a key component, and its protection level directly impacts the box's reliability and safety. In related art, mounting holes are provided in the cover, and the access panel is attached to the cover via bolts threaded through the holes. This reduces the structural strength around the access opening, makes the mounting holes prone to leakage, and results in a low level of protection. However, existing access openings in top covers exhibit poor sealing, resulting in a low level of protection. Utility Model Content

[0003] The purpose of the utility model is to provide a top cover assembly and a battery box, aiming to solve the technical problem of poor sealing performance of the existing top cover.

[0004] In the first aspect, the present application provides an upper cover assembly, which includes a cover body, a connecting flange, an inspection cover plate and a connecting piece; the cover body has an inspection port; the connecting flange is installed on the cover body, the connecting flange is arranged around the inspection port, and the connecting flange is integrally provided with a fastener; the inspection cover plate covers the inspection port and has connecting through holes corresponding one to one to the fasteners, and the ends of the fasteners pass through the connecting through holes; the connecting piece is detachably connected to the end of the fastener to clamp and fix the inspection cover plate between the connecting flange and the connecting piece.

[0005] In the upper cover assembly provided by the present application, a connecting flange is installed on the cover body and is arranged around the inspection port to enhance the structural strength of the side around the inspection port. The connecting piece is connected to the end of the fastener to detachably press and fix the inspection cover to the connecting flange. The connecting flange is integrally provided with fasteners, and there is no need to open mounting holes for installing fasteners on the connecting flange and the cover body, thereby avoiding a decrease in the structural strength of the side around the inspection port due to the opening of mounting holes on the cover body and leakage at the mounting holes of the cover body. This solves the technical problem of poor sealing of the existing upper cover and improves the sealing protection level of the upper cover assembly.

[0006] In one embodiment, the connecting flange and the cover are manufactured separately, reducing the overall manufacturing difficulty and mold requirements for the connecting flange and the cover. The connecting flange is welded to the cover, which not only enhances the structural strength around the inspection port but also ensures a seamless connection between the connecting flange and the cover, reducing the risk of leakage due to gaps in the connection and improving the sealing protection level between the connecting flange and the cover.

[0007] In one embodiment, the connecting flange is integrally formed with the cover body, and the connecting flange and the cover body do not need to be connected, thereby eliminating connection gaps and looseness problems that may exist in split connections and improving the sealing performance of the upper cover assembly.

[0008] In one embodiment, the upper cover assembly further includes a sealing ring compressed and disposed between the access cover and the cover body, surrounding the access opening. The compression of the sealing ring allows the sealing ring to tightly adhere to the access cover and the cover body, sealing the gap between the access cover and the cover body, forming an effective sealing layer that isolates the access opening from the outside world 360° around the circumference, further enhancing the sealing protection level of the upper cover assembly.

[0009] In one embodiment, the thickness of the connecting flange is 30% to 80% of the initial thickness of the sealing ring. The connecting flange separates the cover body and the access cover, limiting the maximum compression of the sealing ring and indicating whether the access cover and the connector are properly installed. The thickness of the connecting flange controls the compression of the sealing ring to 20% to 70% after the access cover is installed. This reduces the need for improved sealing due to insufficient compression of the sealing ring and reduces the excessive pressure on the sealing ring due to excessive compression, thereby improving the service life of the sealing ring.

[0010] In one embodiment, the thickness of the connecting flange is 50% of the initial thickness of the sealing ring, and the compression amount of the sealing ring is limited to precisely 50%. The sealing ring can maintain its elasticity and shape stability when compressed, avoiding deformation, damage or premature aging caused by excessive compression, reducing the risk of low sealing protection level due to insufficient or excessive compression of the sealing ring, and facilitating the realization of a good sealing effect.

[0011] In one embodiment, the cover is equipped with functional components, effectively distributing the functions previously concentrated on the lower cover assembly of the battery box, making more efficient use of the internal space and improving the volume density of the battery box. Furthermore, the cover has an access port, and functional components are installed in the cover, making maintenance easier than if they were installed in the lower cover assembly.

[0012] In one embodiment, the cover includes a front panel, a rear panel, a top panel, and two side panels. The front panel has the inspection opening, and the functional components are mounted on the front panel. Since the front panel has the inspection opening, mounting the functional components on the front panel facilitates inspection and maintenance of the functional components without disassembling the entire cover assembly.

[0013] In one embodiment, multiple functional components are arranged at intervals around the inspection port, fully utilizing the space surrounding the inspection port and optimizing space utilization. Each functional component can be placed as close to the inspection port as possible, facilitating maintenance operations. Furthermore, multiple functional components are centrally located on the front panel, improving functional integration, facilitating wiring between functional components and external connections or connectivity, reducing the complexity of the layout of multiple functional components, and mitigating safety risks.

[0014] In one embodiment, the functional components include a battery management system, a fuse and a fuse connection bar, all of which are installed on the inner wall of the cover body. The fuse is connected in series with the battery management system through the fuse connection bar, ensuring that when the fuse blows, the circuit connection between the battery management system and the batteries located in the battery box can be effectively cut off to prevent the fault from expanding.

[0015] In one embodiment, the functional components also include a high-voltage connector and a low-voltage connector, both sealed and inserted through the cover, effectively preventing electrical leakage and avoiding safety hazards such as short circuits and fires. The high-voltage connector and the low-voltage connector are separately connected to the battery management system. The high-voltage connector and the low-voltage connector are integrated with the battery management system in the upper cover assembly, which can shorten wiring distances and facilitate management and maintenance.

[0016] In one embodiment, the functional component includes an explosion-proof valve, which is sealed and penetrates the cover body to control the connection and disconnection between the battery box and the external environment, ensuring that in an emergency, the explosion-proof valve can work quickly and effectively, thereby reducing the risk of explosion.

[0017] In one embodiment, the functional component includes a fire nozzle, which is sealed and penetrated through the cover body to ensure a rapid response in the early stage of a fire, spraying a fire extinguishing agent, effectively controlling the spread of the fire, and reducing the risk of fire.

[0018] In a second aspect, the present application provides a battery box, which includes a battery module, a lower cover assembly and an upper cover assembly as described above, wherein the upper cover assembly and the lower cover assembly are sealed and connected to enclose an inner cavity, and the battery module is installed in the inner cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 A schematic structural diagram of the upper cover assembly provided in an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 Exploded view of the upper cover assembly in FIG;

[0022] Figure 3 for Figure 1 A partial enlarged view of the upper cover assembly;

[0023] Figure 4 for Figure 1 Another perspective view of the upper cover assembly in FIG;

[0024] Figure 5 for Figure 4 Exploded view of the upper cover assembly.

[0025] Among them, the reference numerals in the figures are:

[0026] 100. Cover; 101. Inspection port; 110. Front panel; 120. Rear panel; 130. Top panel; 140. Side panel; 200. Connecting flange; 210. Fastener; 300. Inspection cover; 301. Connecting hole; 400. Connector; 500. Sealing ring; 600. Functional component; 610. Battery management system; 620. Fuse; 630. Fuse link bar; 640. High-voltage connector; 650. Low-voltage connector; 660. Explosion-proof valve; 670. Fire nozzle. DETAILED DESCRIPTION

[0027] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout this specification, not all references are to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0029] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0031] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] Combine Figures 1 to 3 The upper cover assembly provided in the present application includes a cover body 100, a connecting flange 200, an inspection cover plate 300 and a connecting piece 400. The cover body 100 has an inspection opening 101; the connecting flange 200 is installed on the cover body 100, and the connecting flange 200 is arranged around the inspection opening 101. The connecting flange 200 is integrally provided with a fastener 210; the inspection cover plate 300 covers the inspection opening 101, and the inspection cover plate 300 has a connecting through hole 301 corresponding to the fastener 210 one by one, and the end of the fastener 210 passes through the connecting through hole 301; the connecting piece 400 is detachably connected to the end of the fastener 210 to clamp and fix the inspection cover plate 300 between the connecting flange 200 and the connecting piece 400.

[0033] Compared to opening mounting holes on the cover body 100, the inspection cover plate 300 is installed on the cover body 100 by passing bolts through the mounting holes, resulting in a decrease in the structural strength of the periphery of the inspection opening 101, and the mounting holes are prone to leakage, resulting in a low level of protection. In the upper cover assembly provided in this application, the connecting flange 200 is installed on the cover body 100 and is arranged around the inspection opening 101 to strengthen the structural strength of the periphery of the inspection opening 101. The connecting flange 200 is integrally provided with a fastener 210, eliminating the need to open mounting holes for installing the fastener 210 on the connecting flange 200 and the cover body 100. The connector 400 is connected to the end of the fastener 210 to detachably press and fix the inspection cover plate 300 to the connecting flange 200.

[0034] In some embodiments, combined Figure 2 and Figure 3 , the connecting flange 200 and the cover body 100 are manufactured separately, and the connecting flange 200 is welded and installed on the cover body 100. Separate manufacturing reduces the overall manufacturing difficulty and mold requirements of the connecting flange 200 and the cover body 100, and allows the connecting flange 200 and the cover body 100 to adopt the manufacturing process that is most suitable for their functions and materials respectively. The connecting flange 200 is firmly fixed to the cover body 100 by welding. On the one hand, it can significantly increase the structural strength of the side of the inspection port 101. On the other hand, it can ensure a seamless connection between the connecting flange 200 and the cover body 100, reduce the risk of leakage caused by the connection gap, and help improve the sealing protection level between the connecting flange 200 and the cover body 100. It can be understood that in other embodiments, the connecting flange 200 can also be fixed to the cover body 100 by bonding, interference fit or clipping, which is not specifically limited here.

[0035] In other embodiments, the connecting flange 200 is integrally formed with the cover body 100, and the connection between the connecting flange 200 and the cover body 100 is firm, eliminating the connection gap and looseness problems that may exist in the split connection, eliminating the need for additional sealing measures, and improving the sealing performance of the upper cover assembly.

[0036] In addition, the one-piece molding process simplifies the manufacturing process of the connecting flange 200 and the cover body 100, reduces the steps of assembling and connecting the two, improves position consistency, and ensures a good size match between the two.

[0037] In some embodiments, the upper cover assembly further includes a sealing ring 500, which is compressed and positioned between the access cover 300 and the cover body 100. The compression forces the sealing ring 500 to fit tightly against the access cover 300 and the cover body 100, sealing the gap between the access cover 300 and the cover body 100 and forming an effective seal. The sealing ring 500 surrounds the access opening 101, isolating the access opening 101 from the outside world 360° around its circumference, further enhancing the upper cover assembly's sealing protection.

[0038] In some embodiments, combined Figure 2 and Figure 3 The thickness of the connecting flange 200 is 30% to 80% of the initial thickness of the sealing ring 500. The connecting flange 200 and the sealing ring 500 are both located between the inspection cover 300 and the cover body 100. The connecting flange 200 limits the minimum distance between the cover body 100 and the inspection cover 300. The connecting piece 400 is connected to the fastener 210 and gradually presses the inspection cover 300 until the inspection cover 300 is pressed against the connecting flange 200, indicating that the inspection cover 300 is installed in place. Among them, the initial thickness of the sealing ring 500 is greater than the thickness of the connecting flange 200, so that the sealing ring 500 is in a compressed state, can fit well to the cover body 100 and the inspection cover 300, and surround the sealed and protected inspection port 101, thereby improving the sealing protection level of the inspection port 101.

[0039] The initial thickness of the sealing ring 500 refers to the natural thickness of the sealing ring 500 in an uncompressed state.

[0040] Specifically, the thickness of the connecting flange 200 is less than or equal to 80% of the initial thickness of the sealing ring 500, so that after the inspection cover 300 is installed in place, the compression of the sealing ring 500 is at least 20%, thereby improving the tightness between the sealing ring 500 and the cover body 100 and the inspection cover 300, respectively, and further ensuring the sealing protection level between the cover body 100 and the inspection cover 300.

[0041] Specifically, the thickness of the connecting flange 200 is greater than or equal to 30% of the initial thickness of the sealing ring 500, so that after the inspection cover 300 is installed in place, the compression amount of the sealing ring 500 is at most 70%, which reduces the excessive pressure on the sealing ring 500 due to excessive compression of the sealing ring 500, which is not conducive to the long-term use of the sealing ring 500. It may even be easily damaged due to excessive compression after long-term use, resulting in the risk of leakage.

[0042] In one embodiment, the combination Figure 2 and Figure 3 The thickness of the connecting flange 200 is 50% of the initial thickness of the sealing ring 500. Based on this, after the inspection cover 300 is installed, the compression amount of the sealing ring 500 is 50%, and the sealing ring 500 is compressed to half of its initial thickness. The precise compression amount ensures that the sealing ring 500 forms a close contact with the cover body 100 and the inspection cover 300 respectively. The sealing ring 500 can maintain its elasticity and shape stability when compressed, avoiding deformation, damage or premature aging caused by excessive compression, reducing the risk of low sealing protection level due to insufficient or excessive compression of the sealing ring 500, and facilitating the realization of a good sealing effect.

[0043] The connector 400 can be mounted and fixed to the fastener 210 in an adjustable position along the length of the fastener 210. In some embodiments, the fastener 210 has an external thread and the connector 400 has an internal thread. The connector 400 and the fastener 210 are threadedly connected to each other, facilitating a quick and detachable connection between the connector 400 and the fastener 210. It will be appreciated that in other embodiments, one of the connector 400 and the fastener 210 has a plurality of latch holes spaced apart along the length of the fastener 210, while the other has a latch hole, thereby enabling the connector 400 to be adjustedly mounted and fixed to the fastener 210. Alternatively, the connector 400 can detachably clamp and fix the fastener 210. When the connector 400 is moved to a suitable position along the length of the fastener 210, it is fixed to the fastener 210 by clamping the fastener 210.

[0044] The upper cover assembly is a key component in the battery box. Its space utilization directly impacts the box's volume density, and its level of protection also directly affects the box's reliability and safety. If the upper cover assembly served solely as a protective shell, its structure and function would be limited, resulting in poor space utilization. This forced staff to centrally install all 600 functional components on the lower cover assembly, leading to a chaotic layout within the lower cover assembly. This, for example, made troubleshooting high and low voltage connections complex and potentially exposed safety hazards.

[0045] In some embodiments, combined Figure 1 and Figure 4 The cover body 100 is equipped with functional components 600, which can effectively disperse the functional layout originally concentrated on the lower cover assembly, so that the internal space of the battery box can be more reasonably utilized, the volume density is improved, and it is beneficial to the simplification and safe use of the lower cover assembly.

[0046] In addition, the cover body 100 has an inspection port 101, through which the staff can inspect and maintain the functional components 600 installed on the cover body 100 nearby, thereby improving maintenance efficiency. At the same time, the connector 400 improves the sealing protection level of the inspection port 101 by compressing the sealing ring 500, which is beneficial to protecting the functional components 600 installed on the cover body 100 and ensuring that these functional components 600 can work normally even in harsh environments, thereby improving the reliability of the battery box.

[0047] In one embodiment, the combination Figure 2 and Figure 4The cover includes a front panel 110, a rear panel 120, a top panel 130, and two side panels 140. The front panel 110 has an inspection port 101, and the functional component 600 is mounted on the front panel 110. Since the front panel 110 has the inspection port 101, mounting the functional component 600 on the front panel 110 facilitates inspection and maintenance of the functional component 600 without disassembling the entire upper cover assembly.

[0048] The functional component 600 may be installed on the inner side of the front panel 110 or on the outer side of the front panel 110 , which is not specifically limited here.

[0049] Specifically, the sealing ring 500 is located between the front panel 110 and the inspection cover 300. The connecting flange 200 is mounted on the front panel 110.

[0050] In one embodiment, the combination Figure 2 and Figure 4 There are multiple functional components 600, which are spaced around the inspection port 101. This fully utilizes the space around the inspection port 101 and optimizes space utilization. Each functional component 600 can be as close to the inspection port 101 as possible, facilitating maintenance operations. Multiple functional components 600 are centrally arranged on the front panel 110, improving functional integration, facilitating wiring and connections between the functional components 600, reducing the complexity of the layout of the different functional components 600, and mitigating safety risks.

[0051] In some embodiments, combined Figure 4 and Figure 5 The functional component 600 includes a battery management system 610 (BMS), a fuse 620, and a fuse link 630, all mounted on the inner sidewall of the cover 100. The fuse 620 is connected in series with the BMS 610 via the fuse link 630. The fuse 620 is connected in series with the BMS 610 via the fuse link 630, ensuring that when the fuse 620 blows, the circuit connection between the BMS 610 and the battery is effectively severed, preventing the fault from expanding.

[0052] Based on this, the battery management system 610, the fuse 620 and the fuse connection bar 630 are concentrated on the inner wall of the cover body 100, which can make full use of the internal space of the cover body 100, avoid the confusion and complexity of the structural layout in the lower cover assembly, reduce the direct occupation of the internal space of the battery box by the functional components 600, and improve the volume density and energy density of the battery box.

[0053] Furthermore, the well-sealed access opening 101 improves the safety of the battery management system 610, fuse 620, and fuse link 630. During production, the battery management system 610, fuse 620, and fuse link 630 can be pre-assembled offline. After the battery modules are installed in the lower cover assembly, the upper cover assembly, which integrates the functional components 600, is simply placed on the lower cover assembly to complete the battery box assembly, improving assembly efficiency.

[0054] In some embodiments, combined Figure 2 and Figure 3 The functional component 600 also includes a high-voltage connector 640 and a low-voltage connector 650, both of which are sealed and penetrated through the cover body 100. The high-voltage connector 640 and the low-voltage connector 650 are respectively connected to the battery management system 610. The sealed high-voltage connector 640 and the low-voltage connector 650 can effectively prevent electrical leakage and avoid safety hazards such as short circuits and fires. The high-voltage connector 640 and the low-voltage connector 650 are integrated with the battery management system 610 in the upper cover assembly, which can shorten the wiring distance and make management and maintenance more convenient. For example, the status and performance of the high-voltage connector 640 and the low-voltage connector 650 can be monitored in real time through the BMS to detect and solve problems in a timely manner.

[0055] Among them, the battery management system 610, the high-voltage connector 640 and the low-voltage connector 650 support offline pre-assembly during production, which is conducive to improving the assembly efficiency of the battery box.

[0056] In one embodiment, the combination Figure 4 and Figure 5 The functional component 600 includes an explosion-proof valve 660, which is sealed and penetrated through the cover body 100. The main function of the explosion-proof valve 660 is to release the pressure in time when the internal pressure of the battery box rises abnormally to prevent the battery box from exploding. The explosion-proof valve 660 is sealed and penetrated through the cover body 100. The explosion-proof valve 660 can control the connection and disconnection between the battery box and the external environment to ensure that in an emergency, the explosion-proof valve 660 can work quickly and effectively, thereby reducing the risk of explosion. Integrating the explosion-proof valve 660 with the cover body 100 makes management and maintenance more convenient. Among them, the explosion-proof valve 660 supports offline pre-assembly when the cover body 100 is produced, which is conducive to improving the assembly efficiency of the battery box.

[0057] In one embodiment, the functional component 600 includes a fire nozzle 670, which is sealed and penetrated through the cover 100. This seal ensures a rapid response to fires in the early stages, spraying fire extinguishing agents to effectively control the spread of fire and reduce fire risks. The fire nozzle 670 can be pre-assembled offline during cover 100 production, improving battery box assembly efficiency.

[0058] Furthermore, this application provides a battery box comprising a battery module, a lower cover assembly, and any of the aforementioned upper cover assemblies. The upper and lower cover assemblies are sealed together to enclose an inner cavity, in which the battery module is mounted. Accordingly, the battery box has the corresponding technical effects of the aforementioned upper cover assemblies, which are not elaborated here.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A top cover assembly, characterized in that: The upper cover assembly includes: A cover body having an inspection port; A connecting flange is mounted on the cover body, the connecting flange is arranged around the inspection port, and the connecting flange is integrally provided with a fastener; an inspection cover plate, covering the inspection port, having connection through holes corresponding one to one with the fasteners, and ends of the fasteners passing through the connection through holes; A connecting piece is detachably connected to the end of the fastener to clamp and fix the inspection cover between the connecting flange and the connecting piece.

2. The upper cover assembly according to claim 1, wherein: The connecting flange and the cover body are manufactured separately, and the connecting flange is welded and installed on the cover body; Alternatively, the connecting flange is integrally formed with the cover body.

3. The upper cover assembly according to claim 1, wherein: The upper cover assembly further includes a sealing ring, which is compressed and arranged between the inspection cover plate and the cover body, and is arranged around the inspection port.

4. The upper cover assembly according to claim 3, wherein: The thickness of the connecting flange is 30% to 80% of the initial thickness of the sealing ring.

5. The upper cover assembly according to claim 4, characterized in that: The thickness of the connecting flange is 50% of the initial thickness of the sealing ring.

6. The upper cover assembly according to any one of claims 1 to 5, characterized in that: The cover body is equipped with functional components.

7. The upper cover assembly according to claim 6, characterized in that: The cover plate includes a front panel, a rear panel, a top panel and two side panels, the front panel has the inspection port, and the functional component is installed on the front panel; And / or, there are multiple functional components, and the multiple functional components are distributed around the inspection port at intervals.

8. The upper cover assembly according to claim 7, wherein: The functional components include a battery management system, a fuse, and a fusible link bar, all of which are mounted on the inner side wall of the cover, wherein the fuse is connected in series with the battery management system via the fusible link bar; The functional component includes an explosion-proof valve, which is sealed and penetrates the cover body; The functional component includes a fire-fighting nozzle, and the fire-fighting nozzle is sealed and penetrated through the cover body.

9. The upper cover assembly according to claim 8, characterized in that: The functional component further includes a high-voltage connector and a low-voltage connector, both of which are sealed and penetrate the cover body, and the high-voltage connector and the low-voltage connector are respectively connected to the battery management system.

10. A battery box, characterized in that: The battery box includes a battery module, a lower cover assembly and an upper cover assembly according to any one of claims 1 to 9, wherein the upper cover assembly and the lower cover assembly are sealed and connected to enclose an inner cavity, and the battery module is installed in the inner cavity.

Images