BATTERY PACK, VEHICLE, AND CONTROL METHOD FOR ALLEVIATING THERMAL RUNAWAY OF BATTERY PACK

WIPO Patent Application WO/2021/057283

A1

The present application discloses a battery pack, a vehicle, and a control method for alleviating thermal runaway of a battery pack. The battery pack comprises multiple rechargeable cells and a spray pipeline. Housings of the secondary cells have a thin portion, such that a heat flow generated by thermal runaway of the secondary cells is dischargeable through the thin portion. The spray pipeline corresponds to the thin portion of the secondary cells and is spaced apart from the thin portion by a distance B. At least a portion of the spray pipeline corresponding to the thin portion is a gap region capable of forming an opening under the action of the heat flow. A spray medium in the spray pipeline is sprayed via the opening onto a secondary cell undergoing thermal runaway. A capacity A of the secondary cells, in Ah, and the distance B between the thin portion and the spray pipeline, in mm, satisfy the following: 10 ≤ 3[(A+25)/B]0.5 ≤ 35. The battery pack and the control method for alleviating thermal runaway of a battery pack disclosed in the present application effectively alleviate thermal runaway in the battery pack, thereby improving safety of the battery pack and the vehicle.

HUANG XIAOTENG (CN)
HONG JIARONG (CN)
WANG WENLI (CN)

PCT/CN2020/107815

April 01, 2021

August 07, 2020

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CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)

H01M10/625; H01M10/613

CN209104233U	2019-07-12
CN109273626A	2019-01-25
CN106876823A	2017-06-20
CN104882639A	2015-09-02
JPH09259940A	1997-10-03
JP2014192028A	2014-10-06
US20170179551A1	2017-06-22

See also references of EP 3913730A4

BEIJING EAST IP LTD. (CN)

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