The invention relates to the technical field of chargers, in particular to a lithium battery electric vehicle charger DC voltage output protection circuit which comprises a lithium battery charger switching power supply circuit U1, and the L end and the N end of an input power line of the lithium battery charger switching power supply circuit U1 are used for being connected to a 220V mains supply. The lithium battery charger switching power supply circuit U1 outputs two paths of voltages, wherein one path of 12V voltage is connected to one end of a resistor R2, one end of a resistor R4, the pin 3 of a first path of voltage comparator in an IC1LM339, one end of a resistor R12, a positive electrode of a buzzer Y1, the pin 1 of a one-way silicon controlled rectifier VT1, one end of a resistor R17 and one end of a relay J1; and the other path of 48V voltage is connected to one end of a resistor R1, one end of a resistor R7, one end of a resistor R9 and one end of a normally open contact J1-1. The lithium battery electric vehicle charger DC voltage output protection circuit provided by the invention can effectively realize the over-voltage, over-temperature and over-charge protection of a lithium battery, and ensures the use safety of the lithium battery.
本发明涉及充电器技术领域,具体涉及一种锂电池电动车充电器DC电压输出保护电路,包括锂电池充电器开关电源电路U1,所述锂电池充电器开关电源电路U1的输入电源线L端和N端用于连接到市电220V电源上,且该锂电池充电器开关电源电路U1输出两路电压;其中,一路12V电压连接至电阻R2的一端,电阻R4的一端,IC1LM339内部的第一路电压比较器的3脚,电阻R12的一端,蜂鸣器Y1的正极,单向可控硅VT1的1脚,电阻R17的一端和继电器J1的一端;另一路48V电压连接至电阻R1的一端,电阻R7的一端,电阻R9的一端和常开触点J1‑1的一端;本发明提供的锂电池电动车充电器DC电压输出保护电路,可有效的实现锂电池的过压、过温和过充保护,确保锂电池的使用安全。
Lithium battery electric vehicle charger DC voltage output protection circuit
一种锂电池电动车充电器DC电压输出保护电路
2021-06-22
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 / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen |
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