Charging-and-discharging control device, a battery pack, and an electronic apparatus with improved charge and discarge control
First Claim
1. A charging-and-discharging control device in a battery pack having a rechargeable battery, said charging-and-discharging control device comprising:
- a switching circuit preventing over discharge of the battery;
a control section controlling to turn off said switching circuit when the over discharge of the battery is detected; and
an input terminal which receives a control signal to control said switching circuit externally of the battery pack;
wherein said control section turns off said switching circuit to stop discharging in two cases, a first case being when the over discharge of the battery is detected and a second case being when the control signal for stopping the discharging is applied to said input terminal.
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Accused Products
Abstract
A charging-and-discharging device in an electronic apparatus includes a rechargeable battery and a charging device for charging the battery. The charging-and-discharging device includes a switching circuit electrically isolating one terminal side of the battery from a ground side of the electronic apparatus. The charging-and-discharging device further includes a charge control section controlling the isolating of the one terminal side of the battery from the ground side of the electronic apparatus by turning off the switching circuit during charging of the battery. In the charging-and-discharging device, the one terminal side of the battery is isolated from the ground side of the electronic apparatus by the switching circuit during charging of the battery and a closed loop including the charging device and the battery is established to charge the battery.
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Citations
3 Claims
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1. A charging-and-discharging control device in a battery pack having a rechargeable battery, said charging-and-discharging control device comprising:
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a switching circuit preventing over discharge of the battery; a control section controlling to turn off said switching circuit when the over discharge of the battery is detected; and an input terminal which receives a control signal to control said switching circuit externally of the battery pack; wherein said control section turns off said switching circuit to stop discharging in two cases, a first case being when the over discharge of the battery is detected and a second case being when the control signal for stopping the discharging is applied to said input terminal.
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2. A battery pack comprising:
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a rechargeable battery; and a charging-and-discharging control device including; a switching circuit preventing over discharge of the battery; a control section controlling to turn off said switching circuit when the over discharge of the battery is detected; and an input terminal which receives a control signal to control said switching circuit externally of the battery pack; wherein said control section turns off said switching circuit to stop discharging in two cases, a first case being when the over discharge of the battery is detected and a second case being when the control signal for stopping the discharging is applied to said input terminal.
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3. An electronic apparatus operating with a battery comprising:
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a battery pack supplying power from the battery, said battery pack including; a rechargeable battery; and a charging-and-discharging control device having; a switching circuit preventing over discharge of the battery; a control section controlling said switching circuit to turn off when the over discharge of the battery is detected; and an input terminal for receiving a control signal to control said switching circuit externally of the battery pack; wherein said control section turns off said switching circuit to stop discharging in two cases, a first case being when the over discharge of the battery is detected and a second case being when the control signal for stopping the discharging is applied to said input terminal; power consuming circuits provided with said power of the battery from the battery pack; and a control circuit producing the control signal for stopping the discharging to said input terminal of the battery pack.
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Specification