Power supply system for driving vehicle
The present invention discloses a power supply system capable of supplying electric power to a vehicle, in particular, an electric vehicle, while reducing the number of components and improving stability. An embodiment of the present invention discloses a power supply system comprising: a battery comprising battery cells; a first switching device formed between one electrode of the battery and a power load unit comprising a motor that receives power from the battery; a pre-charge resistor having one end electrically connected to the other electrode of the battery; and a second switching device formed between the other end of the pre-charge resistor and the other electrode of the battery.
1. A power supply system, comprising:
a battery including multiple battery cells;
a first switching device connected between a first electrode of the battery and a power load unit including a motor that receives power from the battery;
a pre-charge resistor having a first end electrically connected to a second electrode of the battery;
a second switching device connected between a second end of the pre-charge resistor and the second electrode of the battery;
a fourth switching device connected between the second end of the pre-charge resistor and the first switching device; and
a fifth switching device connected between a charging unit and a point between the first switching device and the fourth switching device, wherein:
the power load unit includes a first power conversion capacitor connected in parallel to input terminals of the power load unit, and
the first switching device and the pre-charge resistor are connected to opposite ends of the first power conversion capacitor.
2. The power supply system of claim 1 , further comprising a third switching device connected between a first end of the first power conversion capacitor and the second electrode of the battery.
3. The power supply system of claim 1 , wherein the fifth switching device and the pre-charge resistor are connected to opposite ends of a second power conversion capacitor located in front of the charging unit.
4. The power supply system of claim 1 , wherein the battery further includes a rupture switch connected to at least one of a mid portion between each of the battery cells, the first electrode of the battery and the second electrode of the battery.
5. The power supply system of claim 4 , wherein the rupture switch includes a pyrotechnic switch.
6. A power supply system, comprising:
a battery including multiple battery cells;
a first switching device connected between a first electrode of the battery and a power load unit including a motor that receives power from the battery;
a second switching device and a first pre-charge resistor connected to the first switching device in parallel;
a third switching device connected between the power load unit and a second electrode of the battery, and connected between a charging unit, which supplies power to the battery, and the second electrode of the battery;
a fourth switching device connected between the charging unit and a point between the first electrode of the battery and the first switching device; and
a fifth switching device and a second pre-charge resistor connected to the fourth switching device in parallel.