Invention Grant
- Patent Title: Secondary battery safety evaluation method and device
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Application No.: US16621227Application Date: 2018-12-26
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Publication No.: US11121412B2Publication Date: 2021-09-14
- Inventor: Bum-Young Jung , Hee-Min Kim
- Applicant: LG CHEM, LTD.
- Applicant Address: KR Seoul
- Assignee: LG CHEM, LTD.
- Current Assignee: LG CHEM, LTD.
- Current Assignee Address: KR Seoul
- Agency: Morgan, Lewis & Bockius LLP
- Priority: KR10-2018-0011898 20180131
- International Application: PCT/KR2018/016687 WO 20181226
- International Announcement: WO2019/151654 WO 20190808
- Main IPC: G01R31/00
- IPC: G01R31/00 ; H01M10/42 ; G01R31/389 ; G01R31/52

Abstract:
A safety evaluation method according to the present disclosure includes preparing a sample for secondary battery electrode evaluation in which a short circuit will occur by contact between components included in the sample, applying a predetermined pressure that will cause the contact between the components to an area of the sample set as a secondary battery internal short circuit simulation contact area, applying a current between I probes in contact with the sample, obtaining resistance by measuring a potential difference between V probes which are separate from the I probes, obtaining a graph of a change in resistance with a change in distance between the V probes, calculating a short circuit resistance of the area from y-intercept of the graph, and predicting a heat generation amount of the area from the short circuit resistance.
Public/Granted literature
- US11152650B2 Secondary battery safety evaluation method and device Public/Granted day:2021-10-19
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