Patent ID: 9692244
Date: 2017-06-27
CPC Classifications: H02J,Y02T

Claim:
1. A charging apparatus for a secondary battery, comprising: a plurality of power supply battery packs, each being defined a charging and a discharging sequence, and discharging in rotation to supply power to the secondary battery; a plurality of charge-discharge circuits, each corresponding to one of the plurality of power supply battery packs for charging a corresponding power supply battery pack by an external power supply, and controlling the corresponding power supply battery pack to discharge; a microcontroller electrically connected to each charge-discharge circuit to control charging and discharging of each power supply battery pack corresponding to each charge-discharge circuit, wherein the microcontroller sequentially selects one of the power supply battery packs to discharge and be recharged after the discharging; when a last power supply battery unit is recharged after discharging, the power supply battery pack which discharges firstly has been fully recharged to wait for discharging; wherein each of the plurality of charge-discharge circuits includes an analog detection and control circuit, a charging switch, a discharging switch, and a resistor; the analog detection and control circuit detects a power level of each of the plurality of power supply battery packs for the microcontroller, and the plurality of power supply battery packs discharge through the discharging switch and are recharged through the charging switch; wherein the microcontroller is connected to an input-output module of a host computer, and the analog detection and control circuit is used by the host computer to monitor conditions of the power supply battery packs; and a protection circuit provided between each power supply battery pack and the microcontroller, wherein the microcontroller is used to measure an amount of charging and discharging by monitoring terminals of the resistor, and also used to generate a control signal to initial an appropriate safety protection response according to a battery condition of the power supply battery pack; when the microcontroller detects abnormal or unsafe condition, an non-reusable fuse is triggered so as to stop using the power supply battery pack.