CN-119852628-B - Battery pack and electricity utilization device

CN119852628BCN 119852628 BCN119852628 BCN 119852628BCN-119852628-B

Abstract

The application discloses a battery pack and an electric device, wherein the battery pack comprises a box body, a first cross beam, a plurality of single batteries, an electric module, a first bottom plate and a second bottom plate, wherein the box body is provided with a containing cavity, the first cross beam is arranged in the containing cavity and is connected with the box body, the first cross beam is used for dividing the box body into a first space and a second space in a first direction, the single batteries are arranged in the first space, the electric module is arranged in the second space, the first bottom plate is connected with part of the box body and the first cross beam and covers an opening of the first space along a second direction, the second bottom plate is connected with part of the box body and the first cross beam and covers an opening of the second space along the second direction, and the electric module is provided with an interface for electric connection and is arranged towards the second bottom plate along the second direction. The application can independently detach the first bottom plate and the second bottom plate and respectively realize the maintenance of the electric module and the single battery when the battery pack is maintained, and the electric module is inversely locked in the box body because the interface of the electric module faces to the second bottom plate, thereby improving the maintenance convenience.

Inventors

LI DESHENG
ZHOU JIRI
Wan Zhiyang
ZHOU GUANYU
SUN YUPENG

Assignees

欣旺达动力科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250108

Claims (9)

1. A battery pack having a first direction, a second direction, and a third direction, the first direction, the second direction, and the third direction intersecting one another in pairs, comprising: The box body is provided with a containing cavity; The first cross beam is arranged in the accommodating cavity and connected with the box body, and divides the box body into a first space and a second space in the first direction; the first cross beam comprises a body, the first cross beam is provided with a groove, an opening of the groove penetrates through the body along the second direction, and the groove is communicated with the first space and the second space; the plurality of single batteries are arranged in the first space; an electrical module disposed in the second space; The first bottom plate is connected with a part of the box body and the first cross beam and covers and seals the opening of the first space along the second direction; The second bottom plate is connected with a part of the box body and the first cross beam, covers the opening of the second space along the second direction, is provided with an interface for electric connection, is arranged towards the second bottom plate along the second direction, and is inversely locked in the box body; the liquid cooling plate is arranged between the first bottom plate and the single battery; the sealing block is arranged in the groove and connected with the body, and comprises a first side face facing the first bottom plate along the second direction and a second side face facing the second space along the first direction, wherein the second side face is connected with the first side face, the sealing block is provided with a flow passage, and openings of the flow passage respectively penetrate through the first side face and the second side face and are communicated with the liquid cooling plate.
2. The battery pack according to claim 1, wherein the case includes a first side wall and a second side wall opposite to each other in the first direction, the first cross member is located between the first side wall and the second side wall, the first side wall encloses the first space with at least the first cross member, the second side wall encloses the second space with at least the first cross member, the liquid cooling plate has a first surface and a second surface opposite to each other in the second direction, the first surface is connected to the unit cell, and the second surface is connected to the first bottom plate.
3. The battery pack according to claim 2, wherein the case includes a third side wall and a fourth side wall disposed opposite to each other in the third direction, the first cross member extends in the third direction and is connected to the third side wall and the fourth side wall on both sides of the third direction, respectively, and the battery pack further includes: The first boss is arranged in the first space, extends along the first direction and is connected with a part of the third side wall; the second boss is arranged in the first space, extends along the first direction and is connected with a part of the fourth side wall; the third boss is arranged in the first space, extends along the third direction and is connected with a part of the first side wall; the first surface is connected with any one of the first boss, the second boss and the third boss, and along the second direction, the second surface is flush with the surface of any one of the third side wall, the fourth side wall and the first side wall facing the first bottom plate.
4. A battery pack according to claim 3, wherein the first cross member further comprises a fourth boss connected to the body, the fourth boss being provided on a side of the body away from the unit cells and extending in the third direction, both sides of the fourth boss in the third direction being connected to the third side wall and the fourth side wall, respectively; The first surface is connected with the body, and along the second direction, the surface of the fourth boss, which faces the first bottom plate, is flush with the second surface.
5. The battery pack of claim 4, wherein the opening of the recess extends through the fourth boss in the second direction, the The first side surface is flush with the surface of the body facing the first bottom plate along the second direction and is connected with the first surface; the first base plate comprises a first side face, a second side face, a third side face, a fourth side face, a fifth boss and a fourth boss, wherein the first side face is provided with a groove, the fifth boss is arranged in the groove and connected with the part of the first side face, the fifth boss is connected with the fourth boss, and the surface of the fifth boss facing the first base plate is flush with the surface of the fourth boss facing the first base plate along the second direction.
6. The battery pack of claim 1, wherein the electrical module comprises: the battery management unit is arranged in the second space and is connected with one side, far away from the single battery, of the first cross beam; the battery energy distribution unit is arranged in the second space and is connected with one side, far away from the single battery, of the first cross beam; The battery management unit has a first interface, the battery energy distribution unit has a second interface, and either of the first interface or the second interface is disposed toward the second base plate along the second direction.
7. A battery pack according to claim 3, wherein the battery pack further comprises: The sealing piece comprises a frame body and a sealing plate which is positioned in the frame body and connected with the inner wall of the frame body, and the sealing plate extends along the third direction; A part of the frame body is arranged between the box body and the first bottom plate and is respectively connected with the box body and the first bottom plate; the other part of the frame body is arranged between the box body and the second bottom plate and is respectively connected with the box body and the second bottom plate; The sealing plate is arranged on one side of the first cross beam, which faces the first bottom plate and/or the second bottom plate, and is connected with the first cross beam, and one side of the sealing plate, which is far away from the first cross beam in the second direction, is connected with the first bottom plate and/or the second bottom plate.
8. The battery pack of claim 2, further comprising: the top cover plate is arranged on one side, away from the first bottom plate and/or the second bottom plate, of the box body along the second direction and is connected with the box body, and the top cover plate covers the accommodating cavity; the heat preservation piece is arranged between the liquid cooling plate and the first bottom plate and is respectively connected with the liquid cooling plate and the first bottom plate.
9. An electrical device comprising the battery pack of any one of claims 1-8 for powering the electrical device.

Description

Battery pack and electricity utilization device Technical Field The application belongs to the technical field of batteries, and particularly relates to a battery pack and an electric device. Background With the development of battery integration, new requirements for maintenance of automobile battery packs are also presented. When the battery pack is in fault and needs to be overhauled, the battery pack is usually disassembled from the whole vehicle or the seat, so that the overhauling efficiency is low, and meanwhile, as the components such as the single battery, the electric control module, the thermal management system and the like are integrated in the battery pack, the whole battery pack is required to be opened after the fault cause is clear, and the components can be independently maintained, so that the overhauling working condition is complex. Disclosure of Invention The embodiment of the application provides a battery pack and an electric device, which can avoid disassembling the whole battery pack when a vehicle battery system is maintained. The battery pack provided by the embodiment of the application has a first direction and a second direction which are intersected, and comprises: The box body is provided with a containing cavity; the first cross beam is arranged in the accommodating cavity and connected with the box body, and divides the box body into a first space and a second space in the first direction; the plurality of single batteries are arranged in the first space; an electrical module disposed in the second space; The first bottom plate is connected with a part of the box body and the first cross beam and covers and seals the opening of the first space along the second direction; The second bottom plate is connected with the first cross beam and part of the box body, and covers and seals the opening of the second space along the second direction, the electric module is provided with an interface for electric connection, and the interface is arranged towards the second bottom plate along the second direction. In some embodiments, the case includes a first side wall and a second side wall opposite in the first direction, the first beam is located between the first side wall and the second side wall, the first side wall encloses at least the first space with the first beam, and the second side wall encloses at least the second space with the first beam, the battery pack further includes: The liquid cooling plate is arranged between the first bottom plate and the single battery, the liquid cooling plate is provided with a first surface and a second surface which are opposite along the second direction, the first surface is connected with the single battery, and the second surface is connected with the first bottom plate. In some embodiments, the case further has a third direction intersecting the first direction and the second direction in pairs, the case includes a third sidewall and a fourth sidewall disposed opposite to each other along the third direction, the first beam extends along the third direction and is connected to the third sidewall and the fourth sidewall at both sides of the third direction, respectively, and the battery pack further includes: The first boss is arranged in the first space, extends along the first direction and is connected with a part of the third side wall; the second boss is arranged in the first space, extends along the first direction and is connected with a part of the fourth side wall; the third boss is arranged in the first space, extends along the third direction and is connected with a part of the first side wall; the first surface is connected with any one of the first boss, the second boss and the third boss, and along the second direction, the second surface is flush with the surface of any one of the third side wall, the fourth side wall and the first side wall facing the first bottom plate. In some embodiments, the first beam includes a body and a fourth boss connected to the body, the fourth boss is disposed on a side of the body away from the unit cell and extends along the third direction, and two sides of the fourth boss along the third direction are respectively connected to the third side wall and the fourth side wall; The first surface is connected with the body, and along the second direction, the surface of the fourth boss, which faces the first bottom plate, is flush with the second surface. In some embodiments, the first beam has a groove, an opening of the groove penetrates the body and the fourth boss along the second direction, and the groove communicates the first space and the second space, the battery pack further includes: The sealing block is arranged in the groove and connected with the body and the fourth boss, and comprises a first side face which faces the first bottom plate along the second direction, and a second side face which is flush with the surface of the body which faces the first bottom plate along the seco