Title:
POWER SUPPLY DEVICE, AND METHOD FOR DETECTING OPENING OF EXHAUST VALVE OF POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/208156
Kind Code:
A1
Abstract:
The present invention reliably detects that an exhaust valve is open by detecting temperature. A battery having an exhaust valve that opens when an internal pressure becomes higher than a set pressure is stored in a case. The following are provided: a temperature sensor for detecting the temperature inside the case; and a detection circuit for detecting that the exhaust valve is open by using the temperature detected by the temperature sensor. The detection circuit detects that the exhaust valve is open by detecting that a rising gradient (∆T/∆t) of the detected temperature detected by the temperature sensor is greater than a rising gradient set value and that a high temperature time (t1) is longer than a high temperature time set value, the high temperature time being from a timing at which the rising gradient (∆T/∆t) of the detected temperature exceeds the rising gradient set value to a timing at which the detected temperature drops to a reference temperature or below.
Inventors:
OKUMURA MASASHI
MASUDA TSUKASA
MASUDA TSUKASA
Application Number:
PCT/JP2019/015052
Publication Date:
October 31, 2019
Filing Date:
April 05, 2019
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
International Classes:
H01M10/48; H01M50/209
Domestic Patent References:
| WO2017051515A1 | 2017-03-30 |
Foreign References:
| JP2016012490A | 2016-01-21 | |||
| JP2010055957A | 2010-03-11 |
Other References:
See also references of EP 3787096A4
Attorney, Agent or Firm:
TOKUDA Yoshiaki et al. (JP)
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