The invention relates to an alternating-current excitation method, a vehicle-mounted power battery EIS online measurement method, equipment and a medium, and the method comprises the steps: enabling a built-in bidirectional DC-DC converter in a starting power supply to be connected to a to-be-measured vehicle-mounted power battery, and injecting an alternating-current excitation signal into the to-be-measured vehicle-mounted power battery through the bidirectional DC-DC converter in an EIS alternating-current excitation period, and EIS online alternating current excitation is realized. Compared with the prior art, the EIS AC excitation function is realized by directly utilizing the starting power supply, so that the EIS online measurement of the power battery is realized, the efficient utilization of an internal power supply system of an electric vehicle is formed, the repeated design of an AC-DC conversion technology in a vehicle-mounted charger is avoided, and the redundancy and complexity of the power supply system are reduced.
本发明涉及一种交流激励方法、车载动力电池EIS在线测量方法、设备及介质,包括:将启动电源中内置的双向DC‑DC变换器接入待测车载动力电池,在EIS交流激励周期内,通过所述双向DC‑DC变换器将交流激励信号注入待测车载动力电池,实现EIS在线交流激励。与现有技术相比,本发明直接利用启动电源实现EIS交流激励功能,进而实现动力电池EIS在线测量,形成了电动汽车内部电源系统的高效利用,避免了在车载充电机里重复设计交直流转换技术,减少了电源系统冗余和复杂度。
Alternating current excitation method, vehicle-mounted power battery EIS online measurement method, equipment and medium
交流激励方法、车载动力电池EIS在线测量方法、设备及介质
2025-01-28
Patent
Electronic Resource
Chinese
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / 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 / 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 |
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