CN219040626U

CN219040626U - Battery pack and box thereof

Info

Publication number: CN219040626U
Application number: CN202223406865.7U
Authority: CN
Inventors: 张瑶; 杜华兴; 高尚
Original assignee: Jingwei Hengrun Tianjin Research And Development Co ltd
Current assignee: Jingwei Hengrun Tianjin Research And Development Co ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-05-16
Anticipated expiration: 2032-12-15

Abstract

The application provides a battery pack and a box body thereof, wherein the box body comprises an upper shell, a lower shell and a sealing gasket, the upper shell comprises a first panel, a circle of first side plates surrounding the first panel, and a circle of first skirt edges surrounding the first side plates; the lower shell comprises a second panel, a circle of second side plates surrounding the second panel, and a circle of second skirt rims surrounding the second side plates; the sealing gasket is clamped between the first skirt edge and the second skirt edge. The upper shell further comprises X-shaped first reinforcing ribs arranged on the first panel, and four corners of each first reinforcing rib are connected with the first side plate; the lower shell further comprises second reinforcing ribs which are arranged on the second panel and extend along a straight line, the second reinforcing ribs are more than two and parallel to each other, and two ends of each second reinforcing rib are connected with the second side plate. The box of battery package that this application provided not only has guaranteed the intensity requirement with more succinct structural design, has also considered the lightweight demand simultaneously, is favorable to reducing manufacturing cost.

Description

Battery pack and box thereof

Technical Field

The application relates to the technical field of battery packs, in particular to a battery pack and a box body thereof.

Background

With the increasing maturity and perfection of electric automobile technology, electric automobiles are widely used in daily life, and battery packs have become a core energy source of electric automobiles. The battery pack box body is used as a supporting body of the battery module, and plays a key role in safety work and protection of the battery module. The design of the battery pack box body not only needs to consider the whole test strength, but also needs to consider the weight reduction of the battery pack, but the design structure of the existing box body is mostly more complicated, and the manufacturing cost is increased.

Disclosure of Invention

In view of this, this application provides a battery package and box thereof, and this box not only has guaranteed the intensity requirement with more succinct structural design, has also considered the lightweight demand simultaneously, is favorable to reducing manufacturing cost.

In order to achieve the above purpose, the present application provides the following technical solutions:

a case of a battery pack, comprising:

the upper shell comprises a first panel, the edge of the first panel extends to the first side of the first panel to form a circle of first side plates surrounding the first panel, the edge of the first side plates far away from the first panel extends to the outside direction perpendicular to the circle of the first side plates to form a circle of first skirt rims surrounding the first side plates, the upper shell further comprises first reinforcing ribs arranged on the surface of the first side of the first panel, the first reinforcing ribs are X-shaped, and four corners of the first reinforcing ribs are connected with the first side plates;

the lower shell is positioned on the first side of the first panel, the lower shell comprises a second panel, the edge of the second panel extends towards the first panel to form a circle of second side plates surrounding the second panel, the edge of the second side plates away from the second panel extends towards the direction perpendicular to the outside of the circle of the second side plates to form a circle of second skirt rims surrounding the second side plates, the lower shell further comprises second reinforcing ribs which are arranged on the surface, close to one side of the upper shell, of the second panel, the number of the second reinforcing ribs is more than two and are parallel to each other, and the second reinforcing ribs extend along a straight line and are connected with the second side plates at two ends;

and the sealing gasket is clamped between the first skirt edge and the second skirt edge.

Optionally, in the above case, the second reinforcing rib is provided with a first screw hole for mounting the battery module.

Optionally, in the above case, the lower case further includes a third reinforcing rib disposed on a surface of the second panel near one side of the upper case, the third reinforcing rib is more than two and parallel to the second reinforcing rib, two ends of the third reinforcing rib are connected to the second side plate, and a width of the third reinforcing rib is greater than a width of the second reinforcing rib.

Optionally, in the above case, the third reinforcing rib is provided with a second screw hole for mounting the battery module.

Optionally, in the above case, each of the third reinforcing ribs is provided with at least two rows of the second screw holes aligned along an extending direction of the third reinforcing rib.

Optionally, in the above case, the first skirt edge is provided with a circle of first through holes distributed around the first side plate, and the interval distance between any two adjacent first through holes is equal; the second skirt is provided with second through holes corresponding to the first through holes one by one, and the sealing gasket is provided with third through holes corresponding to the first through holes one by one.

Optionally, in the above case, the upper case and the lower case are connected by rivets passing through the first through hole, the third through hole, and the second through hole.

Optionally, in the above case, the lower case further includes a plurality of mounting lugs disposed on a side of the second side plate near the second skirt, and the mounting lugs are symmetrically disposed on both sides of the second panel.

Optionally, in the above case, the second side plate has a first side plate and a second side plate opposite in a direction perpendicular to the second reinforcing rib, the first side plate is provided with a first mounting hole for mounting a manual maintenance switch, the second side plate is provided with a second mounting hole for mounting a water pipe joint of a thermal management system, a third mounting hole for mounting a pressure relief valve, a fourth mounting hole for mounting a pressure relief valve, and a fifth mounting hole for mounting a high-pressure connection plug.

A battery pack comprising a case as disclosed in any one of the above.

According to the above technical solution, in the case of the battery pack provided by the present application, the upper case includes a first panel, a first side plate surrounding the first panel, and a first skirt surrounding the first side plate; the lower housing includes a second panel, a second side panel surrounding the second panel, and a second skirt surrounding the second side panel. The first skirt and the second skirt clamp the gasket such that the first panel, the second panel, the first side panel and the second side panel together form an interior cavity of the case. The internal surface of first panel is provided with X-shaped first stiffening rib, and the internal surface of second panel is provided with a plurality of rectilinear and second stiffening rib that is parallel to each other, moreover, the four corners of first stiffening rib all is connected with first curb plate, and second stiffening rib both ends all are connected with the second curb plate, and such structural design makes the box can obtain higher intensity under equal shell thickness condition, consequently when guaranteeing intensity requirement, can satisfy the lightweight demand well, has also avoided the box structure too complicacy, is favorable to reducing manufacturing cost.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only embodiments of the present application, and other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of a case of a battery pack according to an embodiment of the present application;

FIG. 2 is a schematic exploded view of the case of FIG. 1;

FIG. 3 is a schematic bottom view of the upper housing of FIG. 2;

fig. 4 is a perspective view of the upper housing of fig. 2;

FIG. 5 is a schematic top view of the lower housing of FIG. 2;

fig. 6 is a perspective view of the lower housing of fig. 2;

fig. 7 is a schematic view of the gasket of fig. 2.

Marked in the figure as:

1. an upper housing; 2. a sealing gasket; 22. a second through hole; 3. a lower housing; 4. a first panel; 5. a first reinforcing rib; 6. a first skirt; 61. a first through hole; 7. a fourth side plate; 8. a fifth side plate; 9. a mounting ear;

10. a second reinforcing rib; 101. a first threaded hole; 11. a third reinforcing rib; 111. a second threaded hole; 12. a second skirt; 121. a third through hole; 13. a second panel; 14. a first bracket I; 15. a first bracket II; 16. a second bracket; 17. a third bracket; 18. a fourth bracket;

19. a first side plate; 191. a first mounting hole; 20. a second side plate; 201. a second mounting hole; 202. a first mounting hole; 203. a second mounting hole; 204. a fourth mounting hole; 205. a fifth mounting hole; 21. and a third side plate.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

As shown in fig. 1 to 7, the embodiment of the present application provides a case of a battery pack, including an upper case 1, a lower case 3, and a gasket 2, wherein the upper case 1 includes a first panel 4, an edge of the first panel 4 extends toward a first side of the first panel 4 (i.e., a side close to the lower case 3) to form a first side plate surrounding the first panel 4, and an edge of the first side plate away from the first panel 4 extends in an out-of-loop direction perpendicular to the first side plate to form a first skirt 6 surrounding the first side plate; the lower housing 3 is located on a first side of the first panel 4, and similar to the upper housing 1, the lower housing 3 includes a second panel 13, an edge of the second panel 13 extends toward the first panel 4 to form a circle of second side panels surrounding the second panel 13, and an edge of the second side panels away from the second panel 13 extends in an out-of-circle direction perpendicular to the second side panels to form a circle of second skirt edges 12 surrounding the second side panels; the sealing gasket 2 is clamped between the first skirt edge 6 and the second skirt edge 12, namely, the sealing gasket 2 is ring-shaped and is arranged at the joint of the upper shell 1 and the lower shell 3 to play a role in sealing. The upper shell 1 further comprises a first reinforcing rib 5 arranged on the surface of the first side of the first panel 4, the first reinforcing rib 5 is X-shaped, and four corners of the first reinforcing rib 5 are connected with the first side panel; the lower housing 3 further includes a second reinforcing rib 10 disposed on a surface of the second panel 13 near one side of the upper housing 1, where the second reinforcing rib 10 is more than two and parallel to each other, and the second reinforcing rib 10 extends along a straight line and both ends are connected with the second side plate. The structure enables the box body to obtain higher strength under the condition of equal shell thickness, so that the requirement of strength is guaranteed, the light-weight requirement can be well met, the structure of the box body is prevented from being too complicated, and the production cost is reduced.

The material of the case may be selected according to the need, for example, in a preferred embodiment, the material of the upper case 1 is aluminum alloy, and the material of the lower case 3 is steel. In order to save manufacturing costs, the upper case 1 may be manufactured by integrally machining (e.g., milling a single aluminum alloy plate), and the lower case 3 may be manufactured by welding a plurality of steel plates. The manufacturing method does not need to use a die, so that the cost of the die can be saved. Of course, the upper case 1 and the lower case 3 may be made of the same material, for example, steel materials for both cases, which is not limited in this application.

The first reinforcing ribs 5 are arranged in an X shape, so that the overall mode of the box body can be optimized, and the mode strength is effectively improved. Specifically, the number of the first reinforcing ribs 5 may be two or more, for example, in the structure shown in fig. 3, the number of the first reinforcing ribs 5 is 2, and they are respectively provided in the left half and the right half of the first panel 4. The second reinforcing ribs 10 generally extend in the width direction of the case, and thus the number of the second reinforcing ribs 10 may be set according to the overall length of the case and the required interval between two adjacent second reinforcing ribs 10, and preferably, the second reinforcing ribs 10 are arranged in 4 or 3 equally spaced arrangement. The first screw hole 101 that is used for installing battery module has been offered to this application can make second stiffening rib 10, and battery module can be directly regard as the support to fix with second stiffening rib 10 promptly, need not parts such as additionally setting up module support in the box like this, not only practices thrift the cost, still makes battery module rationally compact even rule arrange, has improved the inside space utilization of box.

Considering the rigidity requirement of the second panel 13 near the middle area, the width of the second reinforcement located in the middle area may be increased appropriately, for example, in the structure shown in fig. 5, the application makes the lower housing 3 further include a third reinforcement rib 11 disposed on the surface of the second panel 13 near one side of the upper housing 1, where the third reinforcement rib 11 is more than two and parallel to the second reinforcement rib 10, two ends of the third reinforcement rib 11 are connected with the second side plate, and the width of the third reinforcement rib 11 is greater than that of the second reinforcement rib 10. Similar to the provision of the first screw hole 101 on the second reinforcing rib 10, the present application may provide the third reinforcing rib 11 with the second screw hole 111 for mounting the battery module. As can be seen from fig. 5, since the third reinforcing ribs 11 have a larger width than the second reinforcing ribs 10, each of the second reinforcing ribs 10 is provided with one row of the first screw holes 101, but each of the third reinforcing ribs 11 is provided with two rows of the second screw holes 111 arranged in the extending direction of the third reinforcing ribs 11. Of course, the second screw holes 111 provided for each third reinforcing rib 11 may be provided in more columns, as the width of the third reinforcing rib 11 and the pitch of the second screw holes 111 allow.

As shown in fig. 6, the second side plate has a first side plate 19 and a second side plate 20 opposite in a direction perpendicular to the second reinforcing rib 10, and the end of the second reinforcing rib 10 extends to a third side plate 21 perpendicular to the first side plate 19 and the second side plate 20, that is, the case may be provided in a rectangular parallelepiped shape. Correspondingly, as shown in fig. 4, the first side plate has a fourth side plate 7 and a fifth side plate 8 perpendicular to each other. In order to enable a more compact arrangement of the components in the box, the present application may have the first side plate 19 open with a first mounting hole 191 for mounting a manual service switch, the second side plate 20 open with a second mounting hole 201 for mounting a water connection of a thermal management system, a third mounting hole for mounting a low pressure connector, a fourth mounting hole 204 for mounting a pressure relief valve, and a fifth mounting hole 205 for mounting a high pressure connector. The number of the third mounting holes may be set to 2 as needed, that is, the third mounting hole one 202 and the third mounting hole two 203 in fig. 6 are both for mounting the pressure connector.

The battery module is disposed in the region where the 2 second reinforcing ribs 10 and the 2 third reinforcing ribs 11 are located in fig. 6, and the region between the second side plate 20 and the adjacent second reinforcing ribs 10 is used to dispose components such as a Battery Management System (BMS), a current sensor, and a battery energy distribution unit (BDU), as shown in fig. 5 and 6, which may be disposed near the second mounting hole 201, so that the present embodiment provides the second panel 13 with 2 second brackets 16 for mounting a BMS main board (or a master module) in the region, and first brackets 14 for mounting a BMS slave board (or a harvesting module) around the second brackets 16, that is, the first brackets 14 and the first brackets 15 in fig. 5 are both used to mount the BMS slave board, but since the first brackets 15 are closer to the second mounting hole 201 for mounting a water pipe joint, in order to avoid interference with the water pipe joint, the space utilization is improved, and thus the difference in size between the first brackets 15 and the first brackets 14 is made smaller than the first brackets 14.

The battery energy distribution unit is generally disposed near the high-voltage connector and the low-voltage connector, and as shown in fig. 5 and 6, the present embodiment provides 5 fourth brackets 18 near the third mounting hole one 202, the third mounting hole two 203 and the fifth mounting hole 205 for mounting the battery energy distribution unit. The current sensor may be disposed between the battery energy distribution unit and the battery management system, so the present embodiment provides 2 third brackets 17 near the third mounting hole one 202 for mounting the current sensor. The respective brackets may be generally designed in a shape of a letter of an n or stand on the inner surface of the second panel 13 by welding.

The widths of the first skirt edge 6, the second skirt edge 12 and the sealing gasket 2 are generally equal, the material of the sealing gasket 2 has certain elasticity, and the sealing gasket is tightly pressed by the rebound force of the material, so that the sealing effect is achieved. In order to improve the sealing effect, the first skirt 6 and the second skirt 12 may be connected by riveting, for example, in a preferred embodiment, the first skirt 6 is provided with a circle of first through holes 61 distributed around the first side plate, and the interval distance between any two adjacent first through holes 61 is equal; the second skirt 12 is provided with second through holes 22 in one-to-one correspondence with the first through holes 61, and the gasket 2 is provided with third through holes 121 in one-to-one correspondence with the first through holes 61. The upper case 1 and the lower case 3 are connected by rivets passing through the first through hole 61, the third through hole 121 and the second through hole 22. In particular, the thickness of the first skirt 6 and the thickness of the second skirt 12 can be made equal, which is advantageous in order to make the pressure exerted by the gasket 2 uniform at each rivet joint.

In order to facilitate the fixed mounting of the battery pack to the vehicle body, the present application may make the lower case 3 include a plurality of mounting lugs 9 disposed on one side of the second side plate near the second skirt 12 (i.e., on the outer side of the lower case 3), and the mounting lugs 9 are symmetrically disposed on both sides of the second panel 13, for example, in the structure shown in fig. 5, the mounting lugs 9 are disposed in 6 pairs on both sides of the second panel 13 opposite to each other, and 3 mounting lugs 9 are disposed on each side.

The application also provides a battery pack, which comprises the box body disclosed in the embodiment. Since the case disclosed in the above embodiment has the above technical effects, the battery pack having the case also has the above technical effects, and will not be described herein again.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A case of a battery pack, comprising:

2. The case according to claim 1, wherein the second reinforcing rib is provided with a first screw hole for mounting the battery module.

3. The case according to claim 2, wherein the lower case further includes a third reinforcing rib provided on a surface of the second panel near the upper case side, the third reinforcing rib being two or more and parallel to the second reinforcing rib, both ends of the third reinforcing rib being connected to the second side plate, and a width of the third reinforcing rib being greater than a width of the second reinforcing rib.

4. The case according to claim 3, wherein the third reinforcing rib is provided with a second screw hole for mounting the battery module.

5. The case according to claim 4, wherein each of the third reinforcing ribs is provided with at least two rows of the second screw holes aligned in the extending direction of the third reinforcing rib.

6. The case according to claim 1, wherein the first skirt is provided with a circle of first through holes distributed around the first side plate, and a distance between any two adjacent first through holes is equal; the second skirt is provided with second through holes corresponding to the first through holes one by one, and the sealing gasket is provided with third through holes corresponding to the first through holes one by one.

7. The case according to claim 6, wherein the upper case and the lower case are connected by rivets passing through the first through hole, the third through hole and the second through hole.

8. The case of claim 1, wherein the lower case further comprises a plurality of mounting lugs provided at a side of the second side plate adjacent to the second skirt, and the mounting lugs are symmetrically arranged at both sides of the second panel.

9. The cabinet of claim 1, wherein the second side plate has a first side plate and a second side plate opposite in a direction perpendicular to the second reinforcing rib, the first side plate being provided with a first mounting hole for mounting a manual service switch, the second side plate being provided with a second mounting hole for mounting a water pipe fitting of a thermal management system, a third mounting hole for mounting a pressure relief valve, a fourth mounting hole for mounting a pressure relief valve, and a fifth mounting hole for mounting a high-pressure connector.

10. A battery pack comprising the case according to any one of claims 1 to 9.