Title:
INTERNAL RESISTANCE CALCULATION APPARATUS
Document Type and Number:
Japanese Patent JP2017040649
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an internal resistance calculation apparatus capable of calculating an internal resistance with high accuracy and a simple configuration.SOLUTION: An internal resistance calculation apparatus comprises: charging means 15 charging a secondary battery B; voltage measuring means 22 measuring a voltage value across the secondary battery B; a capacitor C1 holding the voltage value measured by the voltage measuring means 22 to be equal to a preset voltage value Vc after the charging means 15 starts charging; a capacitor C2 holding the voltage value as a voltage value Vd of the secondary battery B when a charging current changes to be equal to or higher than a predetermined current value within predetermined time after the voltage value becomes the first voltage value Vc; current measuring means 21 measuring a current value Ic when the voltage value Vc becomes a threshold voltage Vth and a charging current value Id when the voltage value becomes the voltage value Vd; and a μCOM 30 calculating an internal resistance of the secondary battery B on the basis of the voltage value Vc, the voltage value Vd, the charging current value Ic, and the charging current value Id.SELECTED DRAWING: Figure 1
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Inventors:
SHODA TAKAHIRO
TAKAGI YOKO
TAKAGI YOKO
Application Number:
JP2016144604A
Publication Date:
February 23, 2017
Filing Date:
July 22, 2016
Export Citation:
Assignee:
YAZAKI CORP
International Classes:
G01R31/36; H01M10/42; H01M10/44; H01M10/48; H02J7/00
Domestic Patent References:
| JP2014219311A | 2014-11-20 | |||
| JP2015014565A | 2015-01-22 | |||
| JP2009053012A | 2009-03-12 |
Attorney, Agent or Firm:
Fumio Takino
Hideo Takino
Takao Kawasaki
Toshiaki Tsuda
Masashi Torino
Yasuhiro Fukuda
Hideo Takino
Takao Kawasaki
Toshiaki Tsuda
Masashi Torino
Yasuhiro Fukuda