Battery pack

By introducing current blocking elements and sensor units into the battery pack, and using the battery management system to control the switching unit to achieve electrical isolation of the battery modules, the problem of thermal runaway in the battery pack is solved, and safety is improved.

CN114765298BActive Publication Date: 2026-07-21SK ON CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SK ON CO LTD
Filing Date
2022-01-12
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing battery packs are prone to thermal runaway when some battery modules are damaged, posing a safety risk.

Method used

The battery module status is monitored by current blocking components and sensor units. The battery management system controls the switching unit to electrically isolate abnormal modules from normal modules to prevent thermal runaway from spreading.

Benefits of technology

It effectively prevents thermal runaway propagation, reduces the risk of explosion, and ensures the safety of the battery pack.

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Abstract

One embodiment of the present invention provides a battery pack including: a battery module array including a plurality of battery modules connected in series and having a first terminal and a second terminal, wherein each of the plurality of battery modules includes at least one battery cell, a current blocking element connected with the battery cell and turned off when an overcurrent is applied, and a sensor unit measuring state information of the battery cell and transmitting the measured information; a battery blocking unit including a first switch unit connected in series with the first terminal, a second switch unit connected in series with the second terminal, and a third switch unit connecting the first terminal and the second terminal; and a battery management system turning on the third switch unit to turn off the current blocking element when the measured information exceeds a predetermined threshold.
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