Title:
BATTERY MONITORING DEVICE AND BATTERY MANAGEMENT UNIT
Document Type and Number:
Japanese Patent JP2023095745
Kind Code:
A
Abstract:
To provide a battery monitoring device capable of ensuring the reliability of a precipitation amount detecting unit that calculates the amount of lithium precipitation.SOLUTION: A battery monitoring device 20 monitors the amount of lithium precipitation in a lithium ion battery. The battery monitoring device 20 includes a short circuit 371 that temporarily short-circuits both ends of the battery and discharges the battery and a precipitation amount detection unit 37 that calculates an estimate of the amount of lithium precipitation on the basis of a change in at least one of a current and a voltage when both ends of the battery are short-circuited in the short circuit 371. The battery monitoring device 20 includes a temperature sensor 31 that detects the battery temperature of the lithium ion battery. The precipitation amount detection unit 37 calculates a corrected value that is obtained by correcting the estimate of the lithium precipitation amount by the battery temperature as a lithium precipitation amount.SELECTED DRAWING: Figure 4
Inventors:
SHIMIZU SATORU
MAWATARI KAZUAKI
ONO KAZUYUKI
KAWABATA KUMIKO
MATSUI HIROKI
MAWATARI KAZUAKI
ONO KAZUYUKI
KAWABATA KUMIKO
MATSUI HIROKI
Application Number:
JP2022104707A
Publication Date:
July 06, 2023
Filing Date:
June 29, 2022
Export Citation:
Assignee:
DENSO CORP
International Classes:
H01M10/48; G01R31/367; G01R31/378; G01R31/387; G01R31/389; G01R31/392; G01R31/396; H02J7/00
Attorney, Agent or Firm:
Patent Attorney Corporation Yuuai Patent Office