Battery pack and device

Patent metadata

Field	Value
Publication number	US-12500309-B2
Application number	US-202117489281-A
Country	US
Kind code	B2
Filing date	Sep 29, 2021
Priority date	Feb 21, 2020
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

An embodiment of the present application provides a battery pack and a device. The battery pack includes a battery module, a heat exchange member, a flow guide piece and a heat-conducting connecting piece. The battery module includes a plurality of batteries. Each battery is provided with an explosion-proof valve. The heat exchange member includes a heat exchange plate. The heat exchange plate is connected to the plurality of batteries through the heat-conducting connecting piece, and the heat exchange plate at least partially covers each explosion-proof valve. The flow guide piece is arranged between the plurality of batteries and the heat exchange plate, the flow guide piece is provided with a positioning hole penetrating in a height direction of the battery pack, and the positioning hole exposes the corresponding explosion-proof valve. The flow guide piece separates the corresponding explosion-proof valve from the heat-conducting connecting piece.

First claim

What is claimed is:

1 . A battery pack, comprising a battery module, a heat exchange member, a flow guide piece and a heat-conducting connecting piece, wherein
the battery module comprises a plurality of batteries, each battery being provided with an explosion-proof valve; the heat exchange member comprises a heat exchange plate, the heat exchange plate being connected to the plurality of batteries through the heat-conducting connecting piece, and the heat exchange plate at least partially covering each explosion-proof valve; the flow guide piece is arranged between the plurality of batteries and the heat exchange plate and is provided with a positioning hole penetrating along a height direction of the battery pack, the positioning hole exposing the corresponding explosion-proof valve; the flow guide piece separates the corresponding explosion-proof valve from the heat-conducting connecting piece; wherein the heat exchange plate is configured to be broken to release a heat exchange medium when any battery is subjected to thermal runaway, so that the heat exchange medium enters the battery through the explosion-proof valve to cool the battery; a plurality of positioning holes are provided, the plurality of positioning holes are arranged at intervals along a length direction of the battery pack, and each positioning hole corresponds to the respective explosion-proof valve; the heat exchange plate comprises a first heat exchange plate and a second heat exchange plate; the first heat exchange plate and the second heat exchange plate are arranged at intervals along a width direction of the battery pack, and each explosion-proof valve is covered with the first heat exchange plate and the second heat exchange plate at the same time; the flow guide piece is provided with an obstructing block, the obstructing block is arranged between two adjacent positioning holes, and the obstructing block is positioned between the first heat exchange plate and the second heat exchange plate.

2 . The battery pack according to claim 1 , wherein a height of the obstructing block in the height direction of the battery pack is not less than a height of the first heat exchange plate and a height of the second heat exchange plate the height direction of the battery pack.

3 . The battery pack according to claim 2 , wherein the obstructing block is protruded from the first heat exchange plate and the second heat exchange plate in the height direction of the battery pack.

4 . The battery pack according to claim 1 , wherein the obstructing block abuts against a side wall of the first heat exchange plate and a side wall of the second heat exchange plate.

5 . The battery pack according to claim 1 , wherein the flow guide piece is provided with a groove, the groove is separated from the positioning hole, and at least part of the heat-conducting connecting piece is positioned in the groove.

6 . The battery pack according to claim 5 , wherein the flow guide piece comprises a main body portion and a connecting portion;
a plurality of main body portions are provided, and the connecting portion is connected between two adjacent main body portions; the plurality of main body portions are arranged corresponding to the plurality of batteries respectively, and the plurality of positioning holes are provided on the plurality of main body portions respectively; the obstructing block is arranged on the connecting portion.

7 . The battery pack according to claim 6 , wherein the groove is formed on an outer side of the connecting portion.

8 . The battery pack according to claim 7 , wherein a size of the groove in a length direction of the battery pack gradually decreases along a direction closed to the connecting portion.

9 . The battery pack according to claim 1 , wherein the heat-conducting connecting piece is a heat-conducting rubber plate.

10 . The battery pack according to claim 1 , wherein the heat-conducting connecting piece is a heat-conducting adhesive, and the heat exchange plate is configured to adhere to the plurality of batteries through the heat-conducting adhesive coating a top of the plurality of batteries.

11 . The battery pack according to claim 1 , wherein a size of the positioning hole is not less than a size of the explosion-proof valve.

12 . The battery pack according to claim 1 , wherein the flow guide piece is configured to adhere to the plurality of batteries by adhesive.

13 . A device, comprising:
a battery pack, comprising a battery module, a heat exchange member, a flow guide piece and a heat-conducting connecting piece, wherein the battery module comprises a plurality of batteries, each battery being provided with an explosion-proof valve; the heat exchange member comprises a heat exchange plate, the heat exchange plate being connected to the plurality of batteries through the heat-conducting connecting piece, and the heat exchange plate at least partially covering each explosion-proof valve; the flow guide piece is arranged between the plurality of batteries and the heat exchange plate and is provided with a positioning hole penetrating along a height direction of the battery pack, the positioning hole exposing the corresponding explosion-proof valve; the flow guide piece separates the corresponding explosion-proof valve from the heat-conducting connecting piece; wherein the battery pack is configured to provide electric energy; wherein the heat exchange plate is configured to be broken to release a heat exchange medium when any battery is subjected to thermal runaway, so that the heat exchange medium enters the battery through the explosion-proof valve to cool the battery; a plurality of positioning holes are provided, the plurality of positioning holes are arranged at intervals along a length direction of the battery pack, and each positioning hole corresponds to the respective explosion-proof valve; the heat exchange plate comprises a first heat exchange plate and a second heat exchange plate; the first heat exchange plate and the second heat exchange plate are arranged at intervals along a width direction of the battery pack, and each explosion-proof valve is covered with the first heat exchange plate and the second heat exchange plate at the same time; the flow guide piece is provided with an obstructing block, the obstructing block is arranged between two adjacent positioning holes, and the obstructing block is positioned between the first heat exchange plate and the second heat exchange plate.

14 . The device according to claim 13 , wherein the obstructing block abuts against a side wall of the first heat exchange plate and a side wall of the second heat exchange plate.

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Yang Haiqi
• Wu Xingyuan
• Zheng Minjie
• Hong Jiarong
• Hu Langchao

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M2200/20

  Pressure-sensitive devices · CPC title

• H01M50/204

  Racks, modules or packs for multiple batteries or multiple cells · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M10/6556

  Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) · CPC title