Title:
BATTERY STATE DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/008728
Kind Code:
A1
Abstract:
Provided is a battery state detection device capable of accurately and relatively easily detecting the state of a secondary battery. In this battery state detection device (1), a μCOM (40) detects multiple internal complex impedances (z1, z2, z3) corresponding to multiple discrete detection frequencies (f1, f2, f3) in the secondary battery (B) and detects the SOH of the secondary battery (B) on the basis of the detected multiple internal complex impedances (z1, z2, z3). Further, the multiple frequencies (f1, f2, f3) corresponding to the multiple internal complex impedances (z1, z2, z3) detected by the μCOM (40) are distributed to two partial frequency ranges corresponding to each of the multiple partial graphs (K1, K2) which indicate the state of the multiple component parts of the secondary battery (B) in a graph (K) plotting in the complex plane the internal complex impedances across a prescribed frequency range of the secondary battery (B).
Inventors:
TAKAHASHI NOBUYUKI (JP)
Application Number:
PCT/JP2014/068697
Publication Date:
January 22, 2015
Filing Date:
July 14, 2014
Export Citation:
Assignee:
YAZAKI CORP (JP)
International Classes:
H01M10/48; G01R31/36; H02J7/00
Domestic Patent References:
| WO2012073997A1 | 2012-06-07 |
Foreign References:
| JP2013088148A | 2013-05-13 |
Attorney, Agent or Firm:
TAKINO, Hideo et al. (JP)
Hideo Takino (JP)
Hideo Takino (JP)
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