Title:
CHARGING/DISCHARGING CONTROL CIRCUIT, CHARGING/DISCHARGING CONTROL METHOD, AND BATTERY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/157836
Kind Code:
A1
Abstract:
This charging/discharging control circuit of a battery device uses a discharging control switch element and a charging control switch element, which are connected between a secondary battery and a load or a charger, to control the charging and discharging of the secondary battery, which is connected between a positive electrode power source terminal and a negative electrode power source terminal. The charging/discharging control circuit comprises: a charger connection detection circuit that produces a charger connection detection signal on the basis of the voltage of an external negative electrode terminal that is connected to the charger; and a pull-up detection circuit that, on the basis of the voltage of the external negative electrode terminal, detects pull-down of the pull-up voltage of the voltage of the external negative electrode terminal, and produces a pull-up detection signal. Having received the pull-up detection signal and the charger connection detection signal after turning the discharging control switch element off, the charging/discharging control circuit turns the discharging control switch element on.
Inventors:
YOSHIKAWA TAKAYASU (JP)
Application Number:
PCT/JP2021/001725
Publication Date:
July 28, 2022
Filing Date:
January 19, 2021
Export Citation:
Assignee:
RICOH ELECTRONIC DEVICES CO LTD (JP)
International Classes:
H02H7/18; H02J7/00
Foreign References:
| JP2019106748A | 2019-06-27 | |||
| JP2010124640A | 2010-06-03 | |||
| JP2019075861A | 2019-05-16 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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