The invention discloses a short-circuit protection circuit for an alternating-current pile of an electric vehicle. The short-circuit protection circuit comprises a first large relay, a second large relay, a first mutual inductor, a second mutual inductor, a first small relay, a second small relay, a voltage detection module, a reference voltage source and a single chip microcomputer. The first large relay is connected in series between the input side LI and the output side LO of the alternating current pile, and the second large relay is connected in series between the input side NI and the output side NO of the alternating current pile; the primary side of the first mutual inductor is connected in series between the input side LI and the input side NI of the alternating current pile to form a first loop; the first small relay, the secondary side of the first mutual inductor, the primary side of the second mutual inductor and the second small relay are sequentially connected in series between the output side LO and the output side NO of the alternating current pile to form a second loop; the two ends of the secondary side of the second mutual inductor are connected to the reference voltage source and the detection end of the single-chip microcomputer respectively. According to the invention, output side short circuit detection can be accurately carried out, thereby ensuring loop charging safety.
本发明公开了一种电动汽车交流桩的短路保护电路,包括:第一大继电器、第二大继电器、第一互感器、第二互感器、第一小继电器、第二小继电器、电压检测模块、基准电压源以及单片机;第一大继电器串联于交流桩的输入侧LI和输出侧LO之间,第二大继电器串联于交流桩的输入侧NI和输出侧NO之间;第一互感器的原边串联于交流桩的输入侧LI和输入侧NI之间形成第一回路;第一小继电器、第一互感器的副边、第二互感器的原边以及第二小继电器依次串联于交流桩的输出侧LO和输出侧NO之间形成第二回路;第二互感器的副边两端分别连接至基准电压源和单片机的检测端;本发明能够准确进行输出侧短路检测,从而确保回路充电安全。
Short-circuit protection circuit for alternating-current pile of electric vehicle
一种电动汽车交流桩的短路保护电路
27.08.2024
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 / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H01H Elektrische Schalter , ELECTRIC SWITCHES / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen |
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