The invention provides a DCDC conversion circuit, a DC charging pile and an energy storage system, and relates to the technical field of electric power. The DCDC conversion circuit comprises at least two conversion branches including a first conversion branch and a second conversion branch, and the first conversion branch and the second conversion branch are connected in parallel; a primary side coil of the coupling transformer is connected in series with the first conversion branch, and a secondary side coil of the coupling transformer is connected in series with the second conversion branch; wherein the turn ratio of the primary side coil of the coupling transformer to the secondary side coil of the coupling transformer is 1. According to the embodiment of the invention, through the magnetic coupling transformer, the current in the two or more parallel conversion branches can be ensured to be consistent, so that the problem of system instability caused by triggering current protection or high-temperature protection due to the fact that the single-path current or power is remarkably too high is avoided, and the equipment reliability is improved.
本申请提供了一种DCDC变换电路、直流充电桩和储能系统,涉及电力技术领域。其中,DCDC变换电路包括:至少两个变换支路,包括第一变换支路和第二变换支路,第一变换支路和第二变换支路并联连接;耦合变压器,耦合变压器的原边线圈串联于第一变换支路,耦合变压器的副边线圈串联于第二变换支路;其中,耦合变压器的原边线圈与耦合变压器的副边线圈的匝比为1。本申请实施例通过磁耦合变压器,能够保证并联的两个或多个变换支路中的电流大小一致,从而避免因单路电流或功率显著过高导致触发电流保护或者高温保护,导致系统不稳定的问题,提高设备可靠性。
DCDC conversion circuit, DC charging pile and energy storage system
DCDC变换电路、直流充电桩和储能系统
2025-02-28
Patent
Electronic Resource
Chinese
IPC: | 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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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