The invention discloses a relay holding circuit and a battery management system. The relay holding circuit comprises a high-voltage isolation power supply, a power supply driving module and a microprocessor of a battery management system; the high-voltage isolation power supply is connected with the two poles of a battery pack, the output end of the power supply driving module, the microprocessorand first end of a first switching device; the input end of the power supply driving module is connected with the microprocessor; and the microprocessor is also connected with a primary battery. Whenthe power supply of the primary battery is abnormal, the microprocessor outputs a low level signal to the power supply driving module; the power supply driving module converts high voltage output by the battery pack into low voltage according to the low level to supply power to the microprocessor and the second end of the first switching device, so that a coil of the relay is kept in a conductingstate during the abnormal power supply of the primary battery. By adopting the technical schemes in the embodiment of the invention, the normal power supply of the battery management system can be maintained under the condition of the abnormal power supply of the lead-acid storage battery.
本发明公开一种继电器保持电路和电池管理系统。该继电器保持电路包括高压隔离电源、电源驱动模块和电池管理系统的微处理器;其中,高压隔离电源分别与电池包的两极、电源驱动模块的输出端、微处理器和第一开关器件的第一端连接;电源驱动模块的输入端与微处理器连接;微处理器还与原电池连接,微处理器在原电池供电异常时,向电源驱动模块输出低电平信号,电源驱动模块根据低电平,将电池包输出的高压电转换为低压电,为微处理器以及第一开关器件的第二端供电,使继电器的线圈在原电池供电异常期间保持导通状态。采用本发明实施例中的技术方案,能够在铅酸蓄电池供电异常的情况下维持电池管理系统的正常供电。
Relay holding circuit and battery management system
继电器保持电路和电池管理系统
2020-05-29
Patent
Elektronische Ressource
Chinesisch
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