Title:
BATTERY STATE ESTIMATION DEVICE, BATTERY SYSTEM, AND BATTERY STATE ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/176028
Kind Code:
A1
Abstract:
The purpose of the present invention, in relation to technology for estimating the state of degradation of a battery using voltage characteristics during a rest period after charging/discharging of the battery, is to accurately estimate the state of degradation of the battery even when it is not possible to obtain a sufficient number of sampling values of the battery voltage in the initial period of the rest period. A battery state estimation device according to the present invention identifies a baseline voltage of a battery voltage during a period after a prescribed time has elapsed after the start of a rest period, estimates the time differential of the battery voltage within the prescribed time according to the difference between the baseline voltage and the battery voltage, and estimates the state of degradation of the battery using the time differential (refer to fig. 1).
Inventors:
KUMAR RAHUL (JP)
KOUNO TORU (JP)
UEDA YUTAKA (JP)
FUJIMOTO AKIRA (JP)
FUJIMOTO HIROYA (JP)
ISOZAKI ERI (JP)
AKIZUKI KEITO (JP)
KOUNO TORU (JP)
UEDA YUTAKA (JP)
FUJIMOTO AKIRA (JP)
FUJIMOTO HIROYA (JP)
ISOZAKI ERI (JP)
AKIZUKI KEITO (JP)
Application Number:
PCT/JP2022/038268
Publication Date:
September 21, 2023
Filing Date:
October 13, 2022
Export Citation:
Assignee:
HITACHI HIGH TECH CORP (JP)
International Classes:
G01R31/392; B60L3/00; B60L58/16; G01R31/3835; G01R31/388; H01M10/42; H01M10/48; H02J7/00
Domestic Patent References:
| WO2022024235A1 | 2022-02-03 |
Foreign References:
| JP2020169968A | 2020-10-15 | |||
| JP2015068784A | 2015-04-13 | |||
| JP2021060198A | 2021-04-15 | |||
| JP2018205309A | 2018-12-27 | |||
| JP2018156759A | 2018-10-04 | |||
| US20180299511A1 | 2018-10-18 | |||
| JP2022164273A | 2022-10-27 |
Attorney, Agent or Firm:
HIRAKI & ASSOCIATES (JP)
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