US 12,442,862 B2
Device detecting abnormality of secondary battery, abnormality detection method, and program
Kei Takahashi, Kanagawa (JP); and Kouhei Toyotaka, Kanagawa (JP)
Assigned to SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Kanagawa-ken (JP)
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
Filed on Oct. 6, 2023, as Appl. No. 18/377,458.
Application 18/377,458 is a division of application No. 16/960,375, abandoned, previously published as PCT/IB2018/060597, filed on Dec. 25, 2018.
Claims priority of application No. 2018-002680 (JP), filed on Jan. 11, 2018; and application No. 2018-017091 (JP), filed on Feb. 2, 2018.
Prior Publication US 2024/0118344 A1, Apr. 11, 2024
Int. Cl. G01R 31/3842 (2019.01); G01R 19/165 (2006.01); G01R 31/367 (2019.01); H01M 10/0525 (2010.01); H01M 10/48 (2006.01)
CPC G01R 31/3842 (2019.01) [G01R 19/16576 (2013.01); G01R 31/367 (2019.01); H01M 10/0525 (2013.01); H01M 10/48 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A charging state estimation device of a secondary battery, comprising:
a first sensing circuit configured to sense a first voltage value of the secondary battery,
a calculation unit configured to calculate a second voltage value, and
a determination unit,
wherein the determination unit comprises one or a plurality of comparators, a multiplexer, and a delay circuit,
wherein an output terminal of the comparator is electrically connected to a first input terminal of an AND circuit and a first input terminal of the multiplexer,
wherein an output terminal of the AND circuit is electrically connected to a second input terminal of the multiplexer through a filter,
wherein an output terminal of the multiplexer is electrically connected to the calculation unit,
wherein a reference voltage is input to a first input terminal of the comparator,
wherein a voltage reference is input to a second input terminal of the comparator and a third input terminal of the multiplexer, and
wherein the voltage reference corresponds to a difference between the first voltage value and the second voltage value.