WO2025040300A1

WO2025040300A1 - Electrical junction box, battery module and vehicle

Info

Publication number: WO2025040300A1
Application number: PCT/EP2024/068736
Authority: WO
Inventors: Min Yang; Caizhen Ella SUN; Jingjing Zhao; Cuicui ZHANG; Weisi GU; Huiyang Jessie YU
Original assignee: Stellantis Auto SAS
Current assignee: Stellantis Auto SAS
Priority date: 2023-08-24
Filing date: 2024-07-03
Publication date: 2025-02-27
Anticipated expiration: 2026-02-24
Also published as: CN119518559A

Abstract

The present application discloses an electrical junction box, a battery module and a vehicle. The electrical junction box includes: a base, a cover and a shutter. The base includes a platform. The cover includes a top plate and a side plate. The top plate covers over the platform, so as to form a wiring space between the top plate and the platform. The side plate extends towards the platform and is spaced apart from the platform, so that a wiring gap which communicates with the wiring space is formed. The shutter is mounted on the side plate and is movable relative to the side plate to open or close the wiring gap. In the electrical junction box according to the present application, the shutter is mounted on the side plate and is movable relative to the side plate to open or close the wiring gap. Therefore, when the busbar is installed, the wiring gap can be opened by only moving the shutter relative to the side plate without removing the shutter. Thus, according to the present application, the case that the shutter falls into the interior of the electrical junction box or the interior of the battery pack does not occur.

Description

ELECTRICAL JUNCTION BOX, BATTERY MODULE AND VEHICLE

This invention claims the priority of the Chinese patent application 202311075679.6 filed on

August 24, 2023, of which the content (Text, Drawings and Claims) is incorporated by reference.

RELATED FIELD

[0001] The present application relates to the technical field of vehicles, and in particular to an electrical junction box. The present application further relates to a battery module having the electrical junction box and a vehicle.

BACKGROUND

[0002] In the prior art, renewable energy vehicles are generally equipped with battery packs to supply power to electrical components (for example, electrical motors). A battery pack typically includes a housing and multiple battery modules disposed inside the housing. These battery modules are electrically connected via busbars (or cables).

[0003] Generally, a junction box may be provided at the connection between a busbar and a battery module, and the side wall of the junction box is provided with a removable shielding sheet. When installing the busbar into the junction box, the shielding sheet needs to be removed to form a hole; the busbar is then plugged into the junction box through the hole. However, the removed shielding sheet may accidentally fall into the interior of the junction box or the interior of the battery pack, which may result in failure of the battery pack.

SUMMARY

[0004] Regarding the above technical problems, a first aspect of the present application proposes an electrical junction box. The electrical junction box includes: a base including a platform, a cover including a top plate and at least one side plate connected to the top plate, and a shutter. The top plate is arranged to cover the platform, so that a wiring space is formed between the top plate and the platform. The side plate extends towards the platform and is spaced apart from the platform, so that a wiring gap which communicates with the wiring space is formed. The shutter is mounted on the side plate and arranged to be movable relative to the side plate to open or close the wiring gap.

[0005] In an embodiment, the shutter is slidably mounted on the side plate, and the shutter is configured to be slidable upwards or downwards along a vertical direction relative to the side plate to open or close the wiring gap, respectively.

[0006] In an embodiment, the shutter includes a main body parallel to the side plate and two sliding claws respectively provided on two vertical edges of the main body, wherein each sliding claw is slidably engaged with a corresponding vertical edge of the side plate.

[0007] In an embodiment, the side plate is provided with multiple openings which are spaced apart from each other along the vertical direction; the shutter further includes an elastic plate on which a first hook is provided; and the elastic plate extends along the vertical direction from the main body and is aligned with the multiple openings, so that the first hook is able to be snapped into a corresponding opening.

[0008] In an embodiment, a raised stopper is provided on at least one vertical edge of the side plate, and the sliding claw is adapted to be stopped by the stopper.

[0009] In an embodiment, the shutter is connected to a lower edge of the side plate by a soft- connection structure to form an entirety with the side plate; the shutter is configured to be turned inwards or outwards through the soft-connection structure relative to the side plate to open the wiring gap, or to extend towards the platform to close the wiring gap.

[0010] In an embodiment, the soft-connection structure is configured as a crease.

[0011] In an embodiment, the top plate is hingedly connected to the base.

[0012] In an embodiment, one of the top plate and the base is provided with a hinge shaft, and the other is provided with a hinge groove, wherein the hinge shaft is rotatably received in the hinge groove.

[0013] In an embodiment, the hinge shaft is provided with a limiting plate which extends radially outward and is adapted to abut against the hinge groove.

[0014] In an embodiment, the base is provided with a protruding portion which protrudes upwards along the vertical direction relative to the platform, wherein the hinge groove is formed in the protruding portion. [0015] In an embodiment, the cover further includes at least one support leg which is offset from the hinge shaft and the side plate, and extends from the top plate towards the base to abut against the base.

[0016] In an embodiment, the base is further provided with at least one support protrusion which abuts against a corresponding support leg.

[0017] In an embodiment, one of the base and the top plate is provided with an elastic second hook, and the other is provided with a connecting slot matching the second hook, wherein the second hook is snapped into the connecting slot.

[0018] In an embodiment, the base further includes a connecting bolt which extends upwards along the vertical direction from the platform.

[0019] A second aspect of the present application proposes a battery module. The battery module includes: a module body comprising a housing and a plurality of cells disposed inside the housing; and the electrical junction box as described above, the electrical junction box being mounted on the housing.

[0020] A third aspect of the present application proposes a vehicle. The vehicle includes: a chassis on which a compartment is mounted, and a battery pack which is laid on the chassis, the battery pack being internally provided with multiple battery modules as described above.

[0021] The beneficial effects of the present application are as follows. The electrical junction box according to the present application includes a shutter. The shutter is connected to the side plate of the cover and is movable relative to the side plate to open or close the wiring gap. Such configuration allows to open the wiring gap, when the busbar is installed, by only moving the shutter relative to the side plate without removing the shutter. Thus, according to the present application, the case that the shutter falls into the interior of the electrical junction box or the interior of the battery pack does not occur. In addition, after removal of the busbar, such configuration allows to close the wiring gap by moving the shutter relative to the side plate without removing the shutter. In this way, the electrical junction box will be sound and require no replacement even if the busbar is disassembled several times, which helps to reduce the cost.

BRIEF DESCRIPTION OF THE DRAWINGS [0022] The accompanying drawings described herein are used for providing a further understanding of the present application, and constitute a part of the present application. Exemplary embodiments of the present application and descriptions thereof are used for explaining the present application, and do not constitute any inappropriate limitation to the present application. In the drawings:

[0023] FIG. 1 schematically shows a vehicle according to an embodiment of the present application.

[0024] FIG. 2 schematically shows a battery module according to an embodiment of the present application.

[0025] FIG. 3 schematically shows a partially enlarged view of a module body.

[0026] FIG. 4 schematically shows an electrical junction box according to a first embodiment of the present application.

[0027] FIG. 5 schematically shows the electrical junction box according to the first embodiment of the present application, wherein a cover is open and a busbar is installed on the electrical junction box.

[0028] FIG. 6 schematically shows a base of the electrical junction box shown in FIG. 5.

[0029] FIG. 7 schematically shows, from a first perspective view, the cover of the electrical junction box shown in FIG. 4.

[0030] FIG. 8 schematically shows, from a second perspective view, the cover of the electrical junction box shown in FIG. 4.

[0031] FIG. 9 schematically shows a shutter of the electrical junction box shown in FIG. 4.

[0032] FIG. 10 schematically shows an electrical junction box according to a second embodiment of the present application.

[0033] FIG. 11 schematically shows the cover shown in FIG. 10, wherein one shutter is turned outwards.

[0034] Listing of reference numerals:

1 vehicle 10 chassis 11 compartment battery pack battery module 0 module body 01 housing 302 pole tab 03 mounting groove electrical junction box 01 wiring space 402 busbar 03 wiring gap 1 base

410 mounting seat 411 platform

412 protruding portion 415 hinge groove

416 support protrusion 417 connecting bolt

418 connecting slot

42 cover

420 top plate 421 side plate

422 vertical edge of side plate 423 opening

424 stopper 425 hinge shaft

426 support leg 427 limiting plate

428 lower edge of side plate 429 second hook

43 shutter

431 main body 432 sliding claw

433 vertical edge of main body 434 elastic plate

436 soft-connection structure 437 first hook

Z vertical direction DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions, and advantages of the present application clearer, the technical solutions of the present application are described clearly and completely in conjunction with the specific embodiments and corresponding drawings of the present application hereinafter. It is apparent that the described embodiments are only some rather than all embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present application.

[0036] In the present application, the term "vertical direction" refers to the direction substantially perpendicular to the platform. The term "inside" refers to the direction substantially directing towards the wiring space; and the term "outside" refers to the direction substantially directing away from the wiring space (that is, opposite to the "inside").

[0037] FIG. 1 schematically shows a vehicle 1 according to an embodiment of the present application. As shown in FIG. 1, the vehicle 1 includes a chassis 10 on which a compartment 11 is mounted. Besides, the vehicle 1 further includes a battery pack 2 laid on the chassis 10. The battery pack 2 is internally provided with a plurality of battery modules 3.

[0038] As shown in FIG. 2, each battery module 3 includes a module body 30 and an electrical junction box 4. The module body 30 includes a housing 301 and a cell (not shown) disposed inside the housing 301. The electrical junction box 4 is mounted on the housing 301. The cell is already known to those skilled in the art and will not be described here.

[0039] In an embodiment, a pole tab 302 of the cell extends from the interior of the housing 301 into a wiring space 401 of the electrical junction box 4 (as shown in FIG. 5) for electrical connection with a busbar 402 (or cable). This will be described in detail in the following.

[0040] As further shown in FIG. 3, a mounting groove 303 is formed in the housing 301. Correspondingly, a mounting seat 410 (as shown in FIG. 4) is provided on a base 41 of the electrical junction box 4. The mounting seat 410 engages into the mounting groove 303 to stably mount the electrical junction box 4 to the module body 30. Of course, the electrical junction box 4 may also be mounted to the housing 301 by other suitable mounting structures (for example, screws, etc.), which will not be further explained here. [0041] The structure of the electrical junction box 4 will be described below with reference to FIGS. 4 to 11.

[0042] FIG. 4 schematically shows an electrical junction box 4 according to a first embodiment. As shown in FIG. 4, the electrical junction box 4 includes a base 41, a cover 42, and a shutter 43.

[0043] Specifically, as shown in FIG. 5 and FIG. 6, the base 41 is provided with a platform 411. The pole tab 302 may be disposed on the platform 411. In addition, the base 41 further includes a connecting bolt 417. The connecting bolt 417 extends upwards along a vertical direction Z from the platform 411. The pole tab 302 is provided with a first mounting hole (not shown) matching the connecting bolt 417. In this way, the pole tab 302 can be sleeved onto the connecting bolt 417 so as to be stably disposed inside the wiring space 401.

[0044] As shown in FIG. 7, the cover 42 includes a top plate 420 and at least one side plate 421 connected to the top plate 420. The top plate 420 covers over the platform 411, thereby forming the wiring space 401 (as shown in FIGS. 4 and 5) between the top plate 420 and the platform 411. As further shown in FIG. 4, the side plate 421 extends towards the platform 411 and is spaced apart from the platform 411, so that a wiring gap 403 which communicates with the wiring space 401 is formed.

[0045] The shutter 43 is mounted on the side plate 421 and adapted to slide upwards or downwards along the vertical direction Z relative to the side plate 421 to open or close the wiring gap 403, respectively.

[0046] In accordance with the electrical junction box 4 of the present application, when the busbar 402 is not installed, the shutter 43 is slid downwards along the vertical direction Z relative to the side plate 421 to approach the platform 411, to close the wiring gap 403. When the busbar 402 is installed, the shutter 43 is slid upwards along the vertical direction Z relative to the side plate 421 to open the wiring gap 403. Then, the busbar 402 is inserted into the wiring space 401 through the wiring gap 403 and electrically connected to the pole tab 302, thereby completing the installation of the busbar 402. During the installation of the busbar 402, it is only required to slide the shutter 43 upwards without removing the shutter 43 from the side plate 421, thereby avoiding the shutter 43 from falling into the interior of the electrical junction box 4 or the interior of the battery pack 2, and thereby preventing the battery pack 2 from failure. After removal of the busbar 402 (for example, when maintaining the busbar, the battery module, or the battery pack), the shutter 43 can be slid downwards to close the wiring gap 403 without removing the shutter 43. In this way, the electrical junction box 4 will be sound and require no replacement even if the busbar 402 is disassembled several times, which helps to reduce the cost.

[0047] In addition, when the busbar 402 is not installed, the shutter 43 closes the wiring gap 403, so that the electrical junction box 4 meets the corresponding protection requirements (for example, meeting the requirements of IPXXB or IP2X). After installation of the busbar 402, the busbar 402 blocks the wiring gap 403, which also enables the electrical junction box 4 to meet the above protection requirements.

[0048] It should be noted that the busbar 402 is also provided with a second mounting hole (not shown) matching the connecting bolt 417. Thereby, the busbar 402 can be sleeved onto the connecting bolt 417 (as shown in FIG. 5) for stable electrical connection with the pole tab 302. In an embodiment, a nut (not shown) may further be screwed onto the connecting bolt 417 to connect the busbar 402 with the pole tab 302 more tightly. In addition, when the busbar 402 is installed, the connecting bolt 417 further plays a pre-positioning role for the busbar 402.

[0049] In an embodiment, as shown in FIGS. 4 and 7, the top plate 420 is substantially rectangular, edges of the top plate 420 away from the module body 30 and not used for connection with the base 41 are each provided with the side plate 421 and the shutter 43. In this way, the wiring gap 403 at either side plate 421 can be selected to install the busbar 402 to adapt to different layouts of the busbar. It should be understood that the top plate 420 may also be constructed into other shapes as needed, which will not be further explained here.

[0050] In an embodiment, the shutter 43 is manufactured separately and then slidably assembled to the side plate 421. As shown in FIG. 9, the shutter 43 includes a main body 431 and two sliding claws 432 respectively provided on two vertical edges 433 of the main body 431. The main body 431 is substantially parallel to the side plate 421. Each of the two sliding claws 432 is slidably engaged with a corresponding vertical edge 422 of the side plate 421. In this way, under the constraint and guidance of the sliding claws 432, the shutter 43 can slide smoothly up and down in the vertical direction along the side plate 421 without being separated from the side plate 421.

[0051] Optionally, as shown in FIG. 7, the side plate 421 is provided with two openings 423 which are spaced apart from each other along the vertical direction Z. As further shown in FIG. 9, the shutter 43 further includes an elastic plate 434 on which a first hook 437 is provided. The elastic plate 434 extends along the vertical direction from the main body 431 and is aligned with the two openings 423, so that the first hook 437 is able to be snapped into a corresponding opening 423. With such configuration, when the busbar 402 is installed, the shutter 43 is slid upwards in the vertical direction Z to depart from the platform 411, and the first hook 437 is snapped into the upper opening 423, whereby the shutter 43 stably opens the wiring gap 403 to allow the busbar 402 to pass through the wiring gap 403. When the busbar 402 is not installed, the shutter 43 is slid downwards in the vertical direction Z to approach the platform 411, and the first hook 437 is snapped into the lower opening 423, whereby the shutter 43 stably closes the wiring gap 403 even if the shutter 43 is subjected to a certain upward thrust, improving the security of the electrical junction box 4.

[0052] It should also be understood that although two openings 423 are provided as shown in FIG. 7, more openings can be provided as required. In this way, the first hook 437 can be snapped into different openings 423 as required, thereby changing the vertical dimension of the wiring gap 403 to adapt to busbars of different thicknesses. This helps to expand the range of use of the electrical junction box 4.

[0053] Optionally, as further shown in FIG. 7, two vertical edges 422 of the side plate 421 are each provided with a raised stopper 424. Each of the sliding claws 432 is adapted to be stopped by the corresponding stopper 424. In this way, when each of the sliding claws 432 comes into contact with the corresponding stopper 424 by sliding the shutter 43 downwards in the vertical direction Z, the shutter 43 (or the sliding claw 432) stops sliding under the obstruction of the stopper 424, thereby preventing the shutter 43 from falling off from the side plate 421. In other embodiments, the stopper 424 may be provided only on one vertical edge 422 of the side plate 421, which will not be further explained here.

[0054] In an embodiment, the stopper 424 is located at a lower end of the vertical edge 422 of the side plate 421. Of course, the stopper 424 may be provided at other positions of the vertical edge 422 of the side plate 421 according to the actual situation, which will not be further explained here.

[0055] Optionally, as further shown in FIGS. 4 and 5, the top plate 420 is hingedly connected to the base 41. In this way, when the busbar 402 is installed, the top plate 420 (or the cover 42) is turned open to expose the wiring space 401 and the platform 411. Thus, the busbar 402 can be conveniently installed on the platform 411, which facilitates user operation.

[0056] In an embodiment, as shown in FIGS. 4 and 6, the base 41 is provided with a hinge groove 415. As shown in FIGS. 4 and 7, the top plate 420 is provided with a hinge shaft 425. The hinge shaft 425 is received in the hinge groove 415 and is adapted to rotate relative to the hinge groove 415. Thus, the top plate 420 (or the cover 42) can be easily turned to depart from the base 41 or to cover the base 41. Of course, the hinge shaft 425 may be disposed on the base 41, and the hinge groove 415 may accordingly be formed in the top plate 420.

[0057] Optionally, as shown in FIG. 8, the hinge shaft 425 is provided with a limiting plate 427 which extends radially outward. Thus, when the cover 42 is turned open, the limiting plate 427 is able to abut against the hinge groove 415 so that the cover 42 stops at a preset open position, preventing the cover 42 from interfering with the operator's operation.

[0058] In an embodiment, as shown in FIG. 6, the base 41 is provided with a protruding portion 412. The protruding portion 412 protrudes upwards along the vertical direction Z (i.e., towards the cover 42) relative to the platform 411. The hinge groove 415 is formed in the protruding portion 412. The protruding portion 412 serves as a limit for the busbar 402 and the pole tab 302 located on the platform 411, so as to prevent the busbar 402 and the pole tab 302 from accidental displacement.

[0059] As further shown in FIG. 7, the cover 42 further includes at least one support leg 426. The support leg 426 is offset from the hinge shaft 425 and the side plate 421, and extends from the top plate 420 towards the base 41 to abut against the base 41. With such configuration, the protruding portion 412 and the support leg 426 jointly support the top plate 420 so that the top plate 420 is spaced apart from the platform 411 to form the wiring space 401 between the top plate 420 and the platform 411.

[0060] It should also be noted that, as shown in FIG. 7, the support leg 426 is spaced apart from the side plate 421 to prevent the support leg 426 from interfering with the sliding of the sliding claw 432. [0061] Optionally, as shown in FIGS. 4 and 6, the base 41 is further provided with a support protrusion 416. The support protrusion 416 extends towards the cover 42 and corresponds to the support leg 426. After the base 41 is covered by the cover 42, the support leg 426 abuts against the support protrusion 416, so that the support leg 426 and the support protrusion 416 jointly support the top plate 420. With such configuration, the support leg 426 may be configured to have a shorter length, which helps to improve the stability of the support leg 426 and further improve the stability of the cover 42.

[0062] Optionally, as shown in FIGS. 4 and 7, the top plate 420 is provided with an elastic second hook 429. The second hook 429 extends toward the base 41 and is offset from the side plate 421. The base 41 is provided with a connecting slot 418 matching the second hook 429. In this way, as shown in FIG. 4, after the base 41 is covered by the cover 42, the second hook 429 is snapped into the connecting slot 418, so that the cover 42 and the base 41 are stably connected together, preventing the cover 42 from being accidentally opened. The second hook 429, by being pressed, can be easily detached from the connecting slot 418, thereby opening the cover 42. In addition, after the base 41 is covered by the cover 42, the second hook 429 also supports the top plate 420 to improve the stability of the top plate 420.

[0063] In an embodiment, as shown in FIG. 7, the second hook 429 is provided at a corner of the top plate 420 and is spaced apart from the side plate 421. In this way, when the cover 42 needs to be opened, the second hook 429 can be easily forced to deform elastically. Correspondingly, as shown in FIG. 6, the connecting slot 418 is also provided at a corresponding corner of the base 41. Of course, the second hook 429 may be also provided at other suitable positions of the top plate 420, and the same is true for the connecting slot 418, which will not be further explained here.

[0064] In another embodiment, the second hook 429 may be disposed on the base 41 and the connecting slot 418 may accordingly be formed in the top plate 420.

[0065] FIG. 10 schematically shows an electrical junction box 4 according to a second embodiment. The electrical junction box 4 of the second embodiment is similar to the electrical junction box 4 of the first embodiment in most parts. The following describes only the differences between the two. [0066] As shown in FIGS. 10 and 11, the shutter 43 is connected to a lower edge 428 of the side plate 421 through a soft-connection structure 436 to form an entirety with the side plate 421. The shutter 43 is configured to be turned inwards or outwards through the soft-connection structure 436 relative to the side plate 421 to open the wiring gap 403, or to extend towards the platform 411 to close the wiring gap 403. With such configuration, when the busbar 402 is installed, the shutter 43 is automatically turned inwards or outwards (as shown in FIG. 10) due to the upward pushing by the busbar 402. When the busbar 402 is not installed, the shutter 43 automatically expands downward towards the platform 411 and closes the wiring gap 403 (as shown in FIG. 10). In this way, when the electrical junction box 4 is used, there is no need to operate the shutter 43 separately, which further facilitates the operator's operation.

[0067] Optionally, as shown in FIGS. 10 and 11, the soft-connection structure 436 is configured as a crease. The thickness at the crease is small and therefore the rigidity at the crease is small, which facilitates turning the shutter 43 relative to the side plate 421 along the crease. In addition, the shutter 43 may be integrally formed with the side plate 421 to facilitate manufacturing of the cover 42. In an embodiment, the cover 42 may be made of PA6 (nylon 6) or other flexible material to facilitate turning the shutter 43 relative to the side plate 421.

[0068] The above only describes the embodiments of the present application and is not intended to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modifications, equivalent substitutions or improvements made within the spirit and principle of the present application shall fall within the scope of protection defined by the appended claims of the present application.

Claims

1. An electrical junction box, comprising: a base (41) comprising a platform (411); a cover (42) comprising a top plate (420) and at least one side plate (421) connected to the top plate (420), wherein the top plate (420) is arranged to cover the platform (411), so that a wiring space (401) is formed between the top plate (420) and the platform (411); and the side plate (421) extends towards and is spaced apart from the platform (411), so that a wiring gap (403) which communicates with the wiring space (401) is formed; and a shutter (43) mounted on the side plate (421) and arranged to be movable relative to the side plate (421) to open or close the wiring gap (403).

2. The electrical junction box according to claim 1, wherein the shutter (43) is slidably mounted on the side plate (421), and the shutter (43) is configured to be slidable upwards or downwards along a vertical direction (Z) relative to the side plate (421) to open or close the wiring gap (403), respectively.

3. The electrical junction box according to claim 2, wherein the shutter (43) comprises a main body (431) parallel to the side plate (421) and two sliding claws (432) respectively provided on two vertical edges (433) of the main body (431), wherein each sliding claw (432) is slidably engaged with a corresponding vertical edge (422) of the side plate (421).

4. The electrical junction box according to claim 3, wherein the side plate (421) is provided with a plurality of openings (423) which are spaced apart from each other along the vertical direction (Z); and the shutter (43) further comprises an elastic plate (434) on which a first hook (437) is provided, wherein the elastic plate (434) extends along the vertical direction (Z) from the main body (431) and is aligned with the openings (423), so that the first hook (437) is able to be snapped into a corresponding opening (423).

5. The electrical junction box according to claim 3, wherein a raised stopper (424) is provided on at least one vertical edge (422) of the side plate (421), and the sliding claw (432) is adapted to be stopped by the stopper (424).

6. The electrical junction box according to claim 1, wherein the shutter (43) is connected to a lower edge (428) of the side plate (421) by a soft-connection structure (436) to form an entirety with the side plate (421); the shutter (43) is configured to be turned inwards or outwards through the soft-connection structure (436) relative to the side plate (421) to open the wiring gap (403), or to extend towards the platform (411) to close the wiring gap (403).

7. The electrical junction box according to claim 6, wherein the soft-connection structure (436) is configured as a crease.

8. The electrical junction box according to claim 1, wherein the top plate (420) is hingedly connected to the base (41).

9. The electrical junction box according to claim 8, wherein one of the top plate (420) and the base (41) is provided with a hinge shaft (425), and the other is provided with a hinge groove (415), wherein the hinge shaft (425) is rotatably received in the hinge groove (415).

10. The electrical junction box according to claim 9, wherein the hinge shaft (425) is provided with a limiting plate (427) which extends radially outward and is adapted to abut against the hinge groove (415).

11. The electrical junction box according to claim 9, wherein the base (41) is provided with a protruding portion (412) which protrudes upwards along the vertical direction (Z) relative to the platform (411), wherein the hinge groove (415) is formed in the protruding portion (412).

12. The electrical junction box according to claim 9, wherein the cover (42) further comprises at least one support leg (426) which is offset from the hinge shaft (425) and the side plate (421), and extends from the top plate (420) towards the base (41) to abut against the base (41).

13. The electrical junction box according to claim 12, wherein the base (41) is further provided with at least one support protrusion (416) which abuts against a corresponding support leg (426).

14. The electrical junction box according to claim 1, wherein one of the base (41) and the top plate (420) is provided with an elastic second hook (429), and the other is provided with a connecting slot (418) matching the second hook (429), wherein the second hook (429) is snapped into the connecting slot (418).

15. The electrical junction box according to claim 1, wherein the base (41) further comprises a connecting bolt (417) which extends upwards along the vertical direction (Z) from the platform (411).

16. A battery module, comprising: a module body (30) comprising a housing (301) and a plurality of cells disposed inside the housing (301); and the electrical junction box (4) according to any one of claims 1 to 15, the electrical junction box (4) being mounted on the housing (301).

17. A vehicle, comprising: a chassis (10), on which a compartment (11) is mounted; and a battery pack (2) which is laid on the chassis (10), the battery pack (2) being internally provided with a plurality of battery modules (3) according to claim 16.