The invention relates to the technical field of battery heating protection, in particular to a power battery heating protection circuit, a method and a device. The circuit comprises a power battery, aheating relay, a heating component, a field effect transistor, a main negative relay and a battery management system, the positive electrode of the power battery is connected with the source electrode of the field effect transistor through the heating relay and the heating component in sequence; the drain of the field effect transistor is connected with the cathode of the power battery through the main negative relay; the control end of the battery management system is connected with the grid electrode of the field-effect tube. According to the circuit, the field effect transistor is connected in series in the heating circuit of the power battery, and the field effect transistor and the heating relay act simultaneously when the heating circuit is switched on and off, so that the situationthat the heating function of the power battery cannot be stopped due to an adhesion fault of the heating relay is avoided; therefore, the safety and reliability of the heating function of the power battery are improved.
本发明涉及电池加热保护技术领域,具体涉及一种动力电池加热保护电路、方法和装置。该电路包括:动力电池、加热继电器、加热元器件、场效应管、主负继电器和电池管理系统;动力电池的正极依次通过加热继电器和加热元器件连接场效应管的源极;场效应管的漏极通过主负继电器连接动力电池的负极;电池管理系统的控制端连接场效应管的栅极。本发明在动力电池的加热回路中,串联了场效应管,在导通和关断加热回路时,场效应管和加热继电器同时动作,避免了因加热继电器出现粘连故障,导致无法终止动力电池加热功能的情况的发生,从而提高了动力电池加热功能的安全可靠性。
Power battery heating protection circuit, method and device
一种动力电池加热保护电路、方法和装置
2021-03-09
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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