Title:
CHARGER HAVING FAILURE DETECTION FUNCTION AND FAILURE DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/203080
Kind Code:
A1
Abstract:
A charger 1 is provided with: a power supply device 10 which charges a secondary battery 3; a power supply path which includes a first switch SW1 and a second switch SW2 and which acts to supply electric power from the power supply device 10 to the secondary battery 3; a discharge circuit C1 which includes a first resistance R1 and a third switch SW3 and which has one end connected to a connection point P between the first switch SW1 and the second switch SW2 and the other end connected to a grounding line; a short-circuit preventing circuit C2 which includes a second resistance R2 and a fourth switch SW4 and which is connected in parallel with the first switch SW1; and a control device 20 which performs ON/OFF control for each switch and obtains a voltage value VP, wherein the control device 20 detects for a failure of each switch on the condition that the voltage value VP is different between normal time and time of failure, with respect to a combination of ON/OFF controls for the switches.
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Inventors:
KANOU TAKASHI (JP)
KITAMURA KENJI (JP)
MIZOGUCHI YASUNARI (JP)
KITAMURA KENJI (JP)
MIZOGUCHI YASUNARI (JP)
Application Number:
PCT/JP2019/015562
Publication Date:
October 24, 2019
Filing Date:
April 10, 2019
Export Citation:
Assignee:
FDK CORP (JP)
International Classes:
H01M10/42; H02J7/00; H01M10/44; H01M10/48
Domestic Patent References:
| WO2004088696A1 | 2004-10-14 |
Foreign References:
| JP2013205257A | 2013-10-07 | |||
| JP2015008600A | 2015-01-15 | |||
| JP2018170851A | 2018-11-01 | |||
| JPH0745307A | 1995-02-14 | |||
| JP2013181822A | 2013-09-12 |
Other References:
See also references of EP 3783768A4
Attorney, Agent or Firm:
NAGATO, Kanji (JP)
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