Title:
POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/079276
Kind Code:
A1
Abstract:
The present invention cuts off overcurrent at a time of reverse connection of a charger while inhibiting avalanche breakdown in a current cutoff switch 2 due to a kickback voltage. This power supply device is provided with a spike absorption circuit (4) that prevents avalanche breakdown in a current cutoff switch (2) which is a semiconductor element connected to a secondary battery (1), due to a kickback voltage when a load current is cut off. The spike absorption circuit (4) is a series circuit of diodes (5) and a protective switch (6) which is a semiconductor element, and is provided with a small signal switch (7) that controls on/off switching of a protective switch (6), and a delay circuit (8) that maintains the on state of the small signal switch (7) for a set time (T) from a current cutoff timing by the current cutoff switch (2). The delay circuit (8) turns on the small signal switch (7) in the set time (T), the small signal switch (7) turns on the protective switch (6), and the spike absorption circuit (4) attenuates the kickback voltage.
Inventors:
TAKEUCHI MOTOJI
OMOTE YUSUKE
HIROTA TAKUYA
KAMEYAMA HISASHI
CHANG JEEWOOK
HAMADA MITSUHIRO
OMOTE YUSUKE
HIROTA TAKUYA
KAMEYAMA HISASHI
CHANG JEEWOOK
HAMADA MITSUHIRO
Application Number:
PCT/JP2017/036942
Publication Date:
May 03, 2018
Filing Date:
October 12, 2017
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
International Classes:
H02J7/00; G05F1/10; H01M10/42
Foreign References:
| JPH05241570A | 1993-09-21 | |||
| JPH09163612A | 1997-06-20 | |||
| JP2009177937A | 2009-08-06 |
Other References:
See also references of EP 3534483A4
Attorney, Agent or Firm:
TOKUDA Yoshiaki et al. (JP)
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