Dual-Battery Charging And Discharging Method And Device And Portable Electronic Device Containing The Same
OwnerMalcolm Hills, David Lininventors
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Abstract
The device contains a first switch and a third switch for the charging and discharging of a main battery, and a second switch and a fourth switch for the charging and discharging of an auxiliary battery. The first switch or the second switch is turned on so as to connect and discharge the main battery or the auxiliary battery to a load circuit. The third switch or the fourth switch is turned on so as to charge the main battery or the auxiliary battery by an external power source. The present invention further provides a portable electronic device incorporating such a dual-battery charging and discharging method or device.
Claims22
A method for controlling the charging a main battery and an auxiliary battery by an external power source and discharging said main battery and said auxiliary battery to a load circuit, comprising the steps of:
- providing a first switch and a third switch for the charging and discharging of said main battery;
- providing a second switch and a fourth switch for the charging and discharging of said auxiliary battery;
- detecting the stored electricity of said main battery and setting a first control signal;
- detecting the presence of said external power source and setting a second control signal;
- turning on said first switch when said second control signal is at logic low and said first control signal is at logic high so as to connect and discharge said main battery to said load circuit;
- turning on said second switch when said second control signal is at logic low and said first control signal is at logic low so as to connect and discharge said auxiliary battery to said load circuit;
- turning on said third switch when said first control signal is at logic high so as to charge said main battery by said external power source;
- and
- turning on said fourth switch when said first control signal is at logic low so as to charge said auxiliary battery by said external power source.
A device for controlling the charging a main battery and an auxiliary battery by an external power source and discharging said main battery and said auxiliary battery to a load circuit, comprising:
- a first switch and a third switch for the charging and discharging of said main battery, said first switch series-connected between said load circuit and said main battery, said third switch series-connected between said external power source and said main battery;
- a second switch and a fourth switch for the charging and discharging of said auxiliary battery, said second switch series-connected between said load circuit and said auxiliary battery, said fourth switch series-connected between said external power source and said auxiliary battery.
- wherein
- said first switch is turned on when a second control signal is at logic low and a first control signal is at logic high so as to connect and discharge said main battery to said load circuit;
- said second switch is turned on when said second control signal is at logic low and said first control signal is at logic low so as to connect and discharge said auxiliary battery to said load circuit;
- said third switch is turned on when said first control signal is at logic high so as to charge said main battery by said external power source;
- and
- said fourth switch is turned on when said first control signal is at logic low so as to charge said auxiliary battery by said external power source.
A portable electronic device, comprising:
- a main battery and an auxiliary battery:
- a first switch and a third switch for the charging and discharging of said main battery, said first switch series-connected between a load circuit and said main battery, said third switch series-connected between an external power source and said main battery;
- a second switch and a fourth switch for the charging and discharging of said auxiliary battery, said second switch series-connected between said load circuit and said auxiliary battery, said fourth switch series-connected between said external power source and said auxiliary battery.
- wherein
- said first switch is turned on when a second control signal is at logic low and a first control signal is at logic high so as to connect and discharge said main battery to said load circuit;
- said second switch is turned on when said second control signal is at logic low and said first control signal is at logic low so as to connect and discharge said auxiliary battery to said load circuit;
- said third switch is turned on when said first control signal is at logic high so as to charge said main battery by said external power source;
- and
- said fourth switch is turned on when said first control signal is at logic low so as to charge said auxiliary battery by said external power source.
Dependencies are inferred from the claim text.