Title:
CURRENT MEASURING DEVICE, CURRENT MEASURING METHOD, AND BATTERY PACK COMPRISING CURRENT MEASURING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/245215
Kind Code:
A1
Abstract:
Provided are a current measuring device, a current measuring method, and a battery pack comprising the current measuring device. The current measuring device comprises: a switching circuit installed in a charge/discharge path for a battery; a current measuring unit including a shunt resistor element disposed in the charge/discharge path and outputting a current signal corresponding to a voltage across both ends of the shunt resistor element; a voltage measuring unit for measuring a voltage across both ends of the switching circuit; a temperature measuring unit for measuring a temperature of the switching circuit; and a control unit. The control unit determines a first current value representing a current flowing through the shunt resistor element on the basis of the current signal. The control unit determines a second current value representing a current flowing through the switching circuit on the basis of the measured voltage and the measured temperature. The control unit determines whether the shunt resistor element is in a normal state on the basis of the first current value and the second current value.
Inventors:
LEE WON-TAE (KR)
CHOI YANG-LIM (KR)
CHOI YANG-LIM (KR)
Application Number:
PCT/KR2019/007013
Publication Date:
December 26, 2019
Filing Date:
June 11, 2019
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
G01R31/382; G01R19/165; G01R27/08; G01R31/36; G01R31/367; H01M10/48
Foreign References:
| JP2017015432A | 2017-01-19 | |||
| KR20130137389A | 2013-12-17 | |||
| JP2006208377A | 2006-08-10 | |||
| KR20160129747A | 2016-11-09 | |||
| JP2009122056A | 2009-06-04 | |||
| KR20180072156A | 2018-06-29 | |||
| KR20190064721A | 2019-06-11 |
Other References:
See also references of EP 3734307A4
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (KR)
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