Title:
LITHIUM ION BATTERY RESIDUAL CAPACITY ESTIMATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/110437
Kind Code:
A1
Abstract:
A lithium ion battery residual capacity estimation device that: estimates the residual capacity of a lithium ion battery (3) that starts an engine starter (1); and comprises a control unit (30) that calculates resistance values for both a positive electrode and a negative electrode in the lithium ion battery and estimates the residual capacity of the lithium ion battery from the increase, over time, of the resistance values for both the positive electrode and negative electrode, said resistance value calculation being made on the basis of detection values for a voltage sensor (SN1) and a current sensor (SN2) when a first time has elapsed since the engine starter has started and on the basis of detection values for the voltage sensor and the current sensor when a second time, longer than the first time, has elapsed. The control unit (30) starts the engine starter by using the lithium ion battery under conditions whereby the start time of the engine starter will be longer, if the previous start time for the engine starter is shorter than a second time or if a prescribed period has elapsed since the previous residual capacity estimation.
Inventors:
YAN TENYU (JP)
UTSUNOMIYA TAKASHI (JP)
UTSUNOMIYA TAKASHI (JP)
Application Number:
PCT/JP2016/086052
Publication Date:
June 29, 2017
Filing Date:
December 05, 2016
Export Citation:
Assignee:
MAZDA MOTOR (JP)
International Classes:
G01R31/36; H01M10/48; H02J7/00
Foreign References:
| JP2014044149A | 2014-03-13 | |||
| JP2015090342A | 2015-05-11 | |||
| JP2014035283A | 2014-02-24 | |||
| JP2013101884A | 2013-05-23 |
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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