Title:
BATTERY BACKUP APPARATUS
Document Type and Number:
Japanese Patent JP2723839
Kind Code:
B2
Abstract:
PURPOSE: To supply electric power to a load device for a long period of time by a second battery when removing a first battery by providing switching means for charging the second battery through a first charging circuit from an electric double layer capacitor when removing the first battery.
CONSTITUTION: A switch 2-1 for switching the power supply from a main battery 1 to a main logic circuit of a load equipment and a switch 2-2 for connecting a charging circuit 5 to a series circuit of a main battery 1 and the switch 2-1 are provided. In addition, for charging to battery 6, a switch 2-3 for connecting an electric double layer capacitor 4 to a charging circuit 5 are provided. By doing this, switches 2-1 and 2-2 are opened and the switch 2-3 are closed when the main battery 1 is removed. So that a backup battery 6 can be charged from the electric double layer capacitor 4. Power can be supplied for a longer time to part of a circuit of the load equipment, memory circuit and the like when there is no electric double layer capacitor 4.
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| JPH06327168 | BACKUP APPARATUS |
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| JPS5863042 | NO-BREAK POWER SOURCE |
Inventors:
SANO KOJI
Application Number:
JP16046895A
Publication Date:
March 09, 1998
Filing Date:
June 27, 1995
Export Citation:
Assignee:
SHIZUOKA NIPPON DENKI KK
International Classes:
H02J9/06; H02J7/00; (IPC1-7): H02J9/06; H02J7/00; H02J9/06
Domestic Patent References:
| JP60160343A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)