The invention discloses an under-voltage protection circuit for an automobile storage battery and a control method of the under-voltage protection circuit. One end of the ignition switch is connected with the storage battery, and the other end is connected with the overload power-off circuit; and the overload power-off circuit is used for preventing the power shortage of the storage battery caused by the excessive power utilization of the load, and comprises a voltage-regulator tube D1, at least two triodes Q1 and Q2, a divider resistor R2 and a divider resistor R3. The protection circuit is low in transformation cost, only a simple circuit needs to be additionally arranged between the storage battery and the vehicle-mounted load, only two triodes and three resistors are needed for cost of the circuit, an additional control module does not need to be added, the protection circuit and the control method detect the automobile storage battery all the time, and the reliability of the automobile storage battery is improved. And the electric quantity of the storage battery can be kept in a reasonable range, so that the problem that the service life of the storage battery is shortened due to overlarge discharge capacity is solved, and the probability that the engine cannot be started due to power shortage of the storage battery is greatly reduced.
本发明公开了一种汽车蓄电池亏电保护电路及其控制方法,包括:蓄电池;点火开关,其一端与蓄电池连接,另一端与过载断电电路连接;过载断电电路,用于防止因负载过度用电导致蓄电池亏电,其包含稳压管D1、至少两个三极管Q1、Q2、分压电阻R2与分压电阻R3。本发明提供的保护电路,改造成本较低,只需要在蓄电池与车载负载之间新增一个简单电路,该电路的成本只需要2个三极管、3个电阻即可,无需添加额外的控制模块,该保护电路和控制方法时刻检测汽车蓄电池,使蓄电池电量能够保持在一个合理的范围,以保证蓄电池不会因放电量过大引起的寿命缩短问题,大大降低了因蓄电池亏电而导致发动机启动不了的概率。
Automobile storage battery power shortage protection circuit and control method thereof
一种汽车蓄电池亏电保护电路及其控制方法
2025-01-07
Patent
Electronic Resource
Chinese
IPC: | H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / F02N STARTING OF COMBUSTION ENGINES , Anlassen von Brennkraftmaschinen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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