The invention discloses a power battery voltage-reduction circuit comprising a first resistor, a second resistor, a first filtering unit, a second filtering unit, a voltage-regulator tube, a controllable switch tube and an LDO chip, wherein the first end of the first resistor and the first end of the second resistor are connected with the voltage output end of a power battery; the second end of the first resistor is connected with the first end of the first filtering unit and the first end of the controllable switch tube; the second end of the second resistor is connected with the control end of the controllable switch tube and a cathode of the voltage-regulator tube; the second end of the controllable switch tube is connected with the first end of the second filtering unit and the voltage input end of the LDO chip; and an anode of the voltage-regulator tube, the second end of the first filtering unit, the second end of the second filtering unit and the grounding end of the LDO chip are all grounded. According to the power battery voltage-reduction circuit, the voltage-reduction effect of the DCDC chip is realized through the circuit elements with relatively low cost, and meanwhile, the power consumption is relatively low and the power battery voltage-reduction circuit is relatively economical. The invention also correspondingly discloses a power supply system.
本申请公开了一种动力电池降压电路,包括第一电阻、第二电阻、第一滤波单元、第二滤波单元、稳压管、可控开关管和LDO芯片,其中:第一电阻的第一端和第二电阻的第一端均与动力电池的电压输出端连接;第一电阻的第二端和第一滤波单元的第一端、可控开关管的第一端均连接;第二电阻的第二端和可控开关管的控制端、稳压管的阴极均连接;可控开关管的第二端与第二滤波单元的第一端、LDO芯片的电压输入端均连接;稳压管的阳极、第一滤波单元的第二端、第二滤波单元的第二端、LDO芯片的接地端均接地。本申请的动力电池降压电路通过成本较低的电路元件实现了DCDC芯片的降压效果,同时功耗更低,更为经济。本申请还相应公开了一种供电系统。
Power battery voltage-reduction circuit and power supply system
一种动力电池降压电路与供电系统
2021-08-13
Patent
Elektronische Ressource
Chinesisch
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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