Title:
STORAGE BATTERY UNIT AND METHOD FOR DETECTING FIRE OF STORAGE BATTERY UNIT
Document Type and Number:
WIPO Patent Application WO/2020/026499
Kind Code:
A1
Abstract:
In the present invention, in order to establish a method for quickly and accurately detecting fire of a storage battery unit from among already-used devices without adding a device, a control unit that monitors a state of a storage battery unit comprising a plurality of storage battery cells and that controls charging/discharging, has a function of monitoring temperature states of the plurality of storage battery cells and determining a temperature difference between the storage battery cells. Regarding a storage battery cell detected to have a temperature equal to or higher than a first threshold value, the control unit opens a line breaker connected in series to the cell, compares the detected temperature of the cell with the detected temperature of a storage battery cell other than the cell, and determines that occurrence of a fire of the storage battery unit has been detected, if at least one of conditions of: the temperature difference between the two cells being at least a second threshold value; a rising rate of the detected temperature of the cell being at least a third threshold value; or the highest value of the detected temperature of the cell being at least a fourth threshold value, is satisfied.
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Inventors:
KURIHARA NOBORU (JP)
TAKAHASHI CHIAKI (JP)
TAKAHASHI CHIAKI (JP)
Application Number:
PCT/JP2019/009043
Publication Date:
February 06, 2020
Filing Date:
March 07, 2019
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01M10/48; B61C3/02; B61C7/04; G08B17/06; H01M10/42; H02H7/18; H02J7/00
Domestic Patent References:
| WO2017029715A1 | 2017-02-23 |
Foreign References:
| JP2013057542A | 2013-03-28 | |||
| JP2008204867A | 2008-09-04 | |||
| JP2014036714A | 2014-02-27 |
Attorney, Agent or Firm:
Patent Corporate Body Dai-ichi Kokusai Tokkyo Jimusho (JP)
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