The invention relates to the technical field of lithium battery protection, and discloses a lithium battery circuit detection protection device which comprises a current detection unit, a current comparison unit, a driving unit and a main control unit. The current detection unit is used for detecting a current and inputting a detection signal to the current comparison unit; the current comparison unit compares the detection signal with a current threshold voltage and inputs a first state signal to the driving unit when the current is abnormal; and the driving unit outputs a short-circuit protection signal and a switch turn-off signal when receiving the first state signal; the main control unit inputs a control signal to the driving unit within time T after receiving the short-circuit protection signal, the driving unit stops outputting the short-circuit protection signal and the switch turn-off signal when receiving the control signal and outputs a switch turn-on signal, and the main control unit receives the short-circuit protection signal output by the driving unit when stopping outputting the control signal continuously N times, and does not input the control signal to the driving unit any more, so that the false current protection is prevented from being triggered.
本发明涉及锂电池保护技术领域,公开了一种锂电池电路检测保护装置,包括电流检测单元、电流比较单元、驱动单元和主控单元;电流检测单元用于检测电流,并向电流比较单元输入检测信号;电流比较单元将检测信号与电流阈值电压进行比较,并在电流异常时向驱动单元输入第一状态信号;驱动单元接收到第一状态信号时输出短路保护信号和开关关断信号,主控单元接收到短路保护信号后在时间T内向驱动单元输入控制信号;驱动单元在接收到控制信号时停止输出短路保护信号和开关关断信号,并输出开关导通信号,当主控单元连续N次在停止输出控制信号时就接收到驱动单元输出的短路保护信号,主控单元不再向驱动单元输入控制信号,避免触发误电流保护。
Lithium battery circuit detection protection device
一种锂电池电路检测保护装置
2021-09-07
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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