The invention discloses a low-power direct-current bidirectional charging and discharging system and method for an electric vehicle, and the system comprises a power grid alternating current interface, a charging and discharging pile module, and an electric vehicle charging and discharging module. The charging and discharging pile module comprises a bidirectional electric energy conversion module group of six 3.5 kW bidirectional electric energy conversion sub-modules, a switch assembly, charging cables and a charging plug, each 3.5 kW bidirectional electric energy conversion sub-module is connected with one charging cable through the switch assembly, and outgoing lines of every two 3.5 kW bidirectional electric energy conversion sub-modules are connected through a switch. When the electric vehicle is charged, the total output power of the bidirectional electric energy conversion module group is flexibly called, and when the electric vehicle is discharged, only the single 3.5 kW bidirectional electric energy conversion sub-module is used for discharging. The technical effect that the electric vehicle can perform low-power discharging in the V2G mode while the charging requirement of the electric vehicle which does not support high-power direct-current quick charging is met is achieved.
本发明公开了一种电动汽车小功率直流双向充放电系统及其充放电方法,系统包括电网交流电接口、充放电桩模块和电动汽车充放电模块,充放电桩模块包括六个3.5kW双向电能变换子模块的双向电能变换模块组、开关组件、充电线缆和充电插头,开关组件将每个3.5kW双向电能变换子模块与一条充电线缆连接,并将每两个3.5kW双向电能变换子模块的出线通过一个开关连接,在电动汽车充电时灵活调用双向电能变换模块组向的总输出功率,在电动汽车放电时,只通过单个3.5kW双向电能变换子模块放电。达到了在满足对于不支持大功率直流快速充电的电动汽车的充电需求的同时,能够使得电动汽车在V2G模式下进行小功率放电的技术效果。
Low-power direct-current two-way charging and discharging system for electric vehicle and charging and discharging method thereof
一种电动汽车小功率直流双向充放电系统及其充放电方法
06.01.2023
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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01B CABLES , Kabel |
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