CN-121983717-A - Battery pack and vehicle

CN121983717ACN 121983717 ACN121983717 ACN 121983717ACN-121983717-A

Abstract

The invention discloses a battery pack and a vehicle, and relates to the technical field of power batteries, wherein the battery pack comprises a box cover and a lower box body module, the box cover is provided with an inner cavity with a downward opening, the lower box body module comprises a liquid cooling plate assembly and a bottom guard plate, the bottom guard plate is arranged at the bottom of the liquid cooling plate assembly, the box cover is covered on the liquid cooling plate assembly, the box cover is fixedly connected with the liquid cooling plate assembly and is also fixedly connected with the bottom guard plate, and the technical scheme provided by the invention can improve the integral assembly efficiency of the battery pack.

Inventors

ZHANG SHUO
LI SHIMING
YANG LIANG

Assignees

浙江吉利控股集团有限公司
浙江远程新能源商用车集团有限公司
浙江远程商用车研发有限公司
浙江远程智芯科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260129

Claims (13)

1. A battery pack, comprising: The box cover is provided with an inner cavity with a downward opening; The lower box module comprises a liquid cooling plate assembly and a bottom guard plate, wherein the bottom guard plate is arranged at the bottom of the liquid cooling plate assembly, the liquid cooling plate assembly is covered by the box cover, and the box cover is fixedly connected with the liquid cooling plate assembly and is fixedly connected with the bottom guard plate.
2. The battery pack of claim 1, wherein the case cover comprises a cover body and a rim, the cover body is provided at a top of the rim, and the rim is integrally formed with the cover body and fixedly connected with the lower case module.
3. The battery pack of claim 2, wherein the frame comprises a front side rail, a rear side rail, and two side rails connected between the front side rail and the rear side rail, the rear side rail and the side rails each being of a multi-cavity closed structure.
4. The battery pack of claim 3, wherein the back side beam and the side beam are each formed using a multiple bending process; and/or, the front edge beam is provided with an avoidance via hole, and the avoidance via hole is used for avoiding the functional piece; and/or, the bottom edge of the front side beam is turned towards the direction deviating from the rear side beam to form a flanging, and the flanging is connected with the lower box body module.
5. The battery pack of claim 3, wherein the liquid cooling plate assembly comprises a liquid cooling plate and at least one middle cross beam, wherein the middle cross beam is arranged along the length direction of the battery pack, the bottom of the middle cross beam is connected with the liquid cooling plate, and the side part of the middle cross beam is connected with the side edge beam.
6. The battery pack according to claim 5, wherein a first adhesive layer is provided between the liquid cooling plate and the intermediate beam; and/or the liquid cooling plate is configured as a brazing liquid cooling plate.
7. The battery pack of claim 5, wherein the side of the middle cross member is provided with a first side hole, the side member is provided with a second side hole corresponding to the first side hole, and a third fastener passes through the second side hole and is locked to the first side hole.
8. The battery pack of claim 7, wherein the side rail is provided with a recessed groove, the second side hole is formed at a bottom of the recessed groove, and/or the battery pack further comprises an airtight cover plate for sealing the second side hole.
9. The battery pack of claim 5, wherein the liquid cooling plate assembly further comprises a front baffle plate, wherein the front baffle plate is positioned between the front edge beam and the middle cross beam and fixedly connected with the front edge beam, and/or a second bonding layer is arranged between the liquid cooling plate and the front baffle plate.
10. The battery pack of claim 5, further comprising a first fastener, wherein the liquid cooling plate is coupled to the bottom guard plate by the first fastener.
11. The battery pack according to claim 10, wherein the plurality of first fasteners are arranged at intervals in the width direction of the battery pack, each of the first fasteners is located on the center line of the liquid cooling plate, and/or a third adhesive layer is provided at the junction of the liquid cooling plate and the bottom guard plate.
12. The battery pack of claim 5, further comprising a second fastener disposed at intervals along the edge of the liquid cooling plate and serially connecting the frame, the liquid cooling plate and the bottom guard plate, and/or a fourth adhesive layer is disposed at the connection of the liquid cooling plate and the frame.
13. A vehicle comprising the battery pack according to any one of claims 1 to 12.

Description

Battery pack and vehicle Technical Field The invention relates to the technical field of power batteries, in particular to a battery pack and a vehicle. Background The existing battery pack box body is generally of a split type design and comprises a bottom plate, a frame, side beams, an upper cover and the like. In order to secure structural stability of the battery pack case, it is generally necessary to fasten the battery pack case with a large number of bolts at each connection site. The amount of the bolts is increased, so that the material cost is increased, and in the assembling process, the bolts with multiple working procedures are fastened, so that the assembling process is complex, and the production efficiency is low. Disclosure of Invention The invention mainly aims to provide a battery pack and a vehicle, and aims to improve the overall assembly efficiency of the battery pack. In order to achieve the above object, a battery pack according to the present invention includes: The box cover is provided with an inner cavity with a downward opening; The lower box module comprises a liquid cooling plate assembly and a bottom guard plate, wherein the bottom guard plate is arranged at the bottom of the liquid cooling plate assembly, the liquid cooling plate assembly is covered by the box cover, and the box cover is fixedly connected with the liquid cooling plate assembly and is fixedly connected with the bottom guard plate. In an embodiment, the case cover includes a cover main body and a frame, wherein the cover main body is disposed at the top of the frame, and the frame is integrally formed with the cover main body and is fixedly connected with the lower case module. In an embodiment, the frame includes a front side beam, a rear side beam, and two side beams connected between the front side beam and the rear side beam, wherein the rear side beam and the side beams are all of a multi-cavity closed structure. In one embodiment, the rear side beam and the side beam are both manufactured by adopting a multi-time bending process; and/or, the front edge beam is provided with an avoidance via hole, and the avoidance via hole is used for avoiding the functional piece; and/or, the bottom edge of the front side beam is turned towards the direction deviating from the rear side beam to form a flanging, and the flanging is connected with the lower box body module. In an embodiment, the liquid cooling plate assembly comprises a liquid cooling plate and at least one middle cross beam, wherein the middle cross beam is arranged along the length direction of the battery pack, the bottom of the middle cross beam is connected with the liquid cooling plate, and the side part of the middle cross beam is connected with the side edge beam. In one embodiment, a first bonding layer is arranged between the liquid cooling plate and the middle cross beam; and/or the liquid cooling plate is configured as a brazing liquid cooling plate. In an embodiment, the side portion of the middle cross beam is provided with a first side hole, the side beam is provided with a second side hole corresponding to the first side hole, and the third fastener penetrates through the second side hole and is locked to the first side hole. In one embodiment, the side beam is provided with a concave groove, the second side hole is formed at the bottom of the concave groove, and/or the battery pack further comprises an airtight cover plate for sealing the second side hole. In one embodiment, the liquid cooling plate assembly further comprises a front baffle plate, wherein the front baffle plate is positioned between the front edge beam and the middle cross beam and is fixedly connected with the front edge beam, and/or a second bonding layer is arranged between the liquid cooling plate and the front baffle plate. In one embodiment, the battery pack further includes a first fastener, and the liquid cooling plate is connected to the bottom guard plate through the first fastener. In one embodiment, the plurality of first fasteners are arranged at intervals along the width direction of the battery pack, each first fastener is located on the central line of the liquid cooling plate, and/or a third bonding layer is arranged at the joint of the liquid cooling plate and the bottom guard plate. In one embodiment, the battery pack further comprises second fasteners, wherein the second fasteners are distributed along the edges of the liquid cooling plate at intervals and are connected with the frame, the liquid cooling plate and the bottom guard plate in series. The invention also proposes a vehicle comprising a battery pack as described above. According to the technical scheme, the box cover is a single component with an inner cavity, the processing and manufacturing are convenient, the production period and the cost can be reduced, the bottom guard plate and the liquid cooling plate assembly are connected and matched with each other, the box cover is integrated int