Title:
BATTERY PACK INSPECTION METHOD AND INSPECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/069390
Kind Code:
A1
Abstract:
An inspection device includes a charger (2) and an inspection unit (3), acquires a first cell voltage (V1) at the start of constant current charging and a second cell voltage (V2) at a stage when charging has progressed, and detects a connection abnormality by calculating the deviations (DV1, DV2) between these voltages and an average value for all cell groups (C'). A cell group (C') for which the deviation (DV1) of the first cell voltage (V1) is small and the deviation (DV2) of the second cell voltage (V2) is large is determined (step 13) to have a parallel connection abnormality. If both deviations (DV1, DV2) are large and equivalent to one another, a series connection abnormality is determined (step 21).
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Inventors:
YONEKURA SHIRO (JP)
KURIBAYASHI ERIKO (JP)
TAKAMOTO NOBUHIRO (JP)
KURIBAYASHI ERIKO (JP)
TAKAMOTO NOBUHIRO (JP)
Application Number:
PCT/JP2017/036115
Publication Date:
April 11, 2019
Filing Date:
October 04, 2017
Export Citation:
Assignee:
NISSAN MOTOR (JP)
International Classes:
H02J7/00; G01R31/36; H01M10/48; H02J7/02
Foreign References:
| JPH09117072A | 1997-05-02 | |||
| JP2006337155A | 2006-12-14 | |||
| JP2009216448A | 2009-09-24 | |||
| JP2004031120A | 2004-01-29 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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