To protect auxiliary machine components which operate with system voltage of a battery from high voltage while suppressing cost increase due to a high voltage countermeasure when boost charge is performed with the high voltage.SOLUTION: A power supply circuit 30 is loaded on an electric vehicle 10 comprising: a battery 16 which receives supply of power from an external DC power supply; auxiliary machine components 18, 20 which operate with system voltage Vb of the battery 16; and a DC inlet 22 to which voltage (supply voltage Vs) higher than the system voltage Vb is applied from the external DC power supply. The power supply circuit 30 comprises: a first power line 32; a step-down circuit 38; and a second power line 34. The first power line 32 connects the DC inlet 22 with the battery 16. The step-down circuit 38 is arranged on the first power line 32 to step down the voltage (supply voltage Vs) to be supplied from the DC inlet 22 to the battery 16. One end of the second power line 34 is connected with the first power line 32 between the step-down circuit 38 and the battery 16, and the other end is connected with the auxiliary machine components 18, 20.SELECTED DRAWING: Figure 1
【課題】高電圧で急速充電を行う際に、高電圧対策によるコストアップを抑制しつつ、バッテリのシステム電圧で作動する補機部品を高電圧から保護可能とする。【解決手段】電源回路30は、外部直流電源から電力の供給を受けるバッテリ16と、バッテリ16のシステム電圧Vbで作動する補機部品18、20と、システム電圧Vbよりも高い電圧(供給電圧Vs)が外部直流電源から印加される直流インレット22とを含む電動車両10に搭載される。電源回路30は、第1電力線32と降圧回路38と第2電力線34とを備える。第1電力線32は直流インレット22とバッテリ16とを接続する。降圧回路38は第1電力線32上に配置され、直流インレット22からバッテリ16に供給される電圧(供給電圧Vs)を降下させる。第2電力線34の一端は降圧回路38とバッテリ16との間において第1電力線32に接続され、その他端は補機部品18、20に接続される。【選択図】図1
POWER SUPPLY CIRCUIT OF ELECTRIC VEHICLE
電動車両の電源回路
2021-04-15
Patent
Electronic Resource
Japanese
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 / 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 |