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US 10,538,173 B2Granted
Vehicle battery charging control system
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsHui Sung Jang, Gi Bong Son, Hyun Wook Seong
Life of this patent
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Abstract
Disclosed herein is a vehicle battery charging control system, which is capable of increasing efficiency of power delivered to an electric device and a low-voltage battery to improve fuel efficiency, by connecting a low-voltage DC-DC converter (LDC) to an AC power source instead of a high-voltage battery upon charging a low-voltage battery of a vehicle to prevent power delivery efficiency of an on-board battery charger (OBC) from being reduced.
Claims10
A vehicle battery charging control system comprising:
- a first charging circuit configured to convert an alternating current (AC) voltage received from an external AC power source into a direct current (DC) voltage and to output the DC voltage;
- a high-voltage battery configured to receive the DC voltage output from the first charging circuit and to store energy delivered from the first charging circuit;
- a second charging circuit configured to convert the AC voltage received from the external AC power source into a DC voltage and to output the DC voltage and including a DC-DC conversion circuit configured to output the DC voltage;
- a low-voltage battery configured to receive the DC voltage output from the second charging circuit and to store energy delivered from the second charging circuit;
- a first switching unit connected between the high-voltage battery and an input terminal of the DC-DC conversion circuit of the second charging circuit;
- and
- a controller configured to control a state of the first switching unit depending on whether a vehicle travels or whether the vehicle is charged,
- wherein the second charging circuit further includes a power factor corrector (PFC) configured to convert the AC voltage received from the external AC power source into a DC voltage and to output the DC voltage, the PFC including a rectifier and a boost converter,
- wherein the DC-DC conversion circuit of the second charging circuit drops the DC voltage output from the PFC and outputs a DC voltage, and
- wherein one side of the first switching unit is connected to the high-voltage battery and another side of the first switching unit is connected to an input terminal of the boost converter of the PFC.
7 more elements
A vehicle battery charging control system comprising:
- a first charging circuit including a filter configured to eliminate noise of an external alternating current (AC) power source, a power factor corrector (PFC) configured to convert an AC voltage received from the external AC power source into a direct current (DC) voltage and to output the DC voltage, a relay connected between the filter and the PFC, and a DC-DC conversion circuit configured to boost the DC voltage output from the PFC and to output a DC voltage;
- a high-voltage battery configured to receive the DC voltage output from the first charging circuit and to store energy delivered from the first charging circuit;
- a second charging circuit configured to convert the AC voltage received from the external AC power source into a DC voltage and to output the DC voltage, including a DC-DC conversion circuit configured to output a DC voltage, and connected to the first charging circuit and the high-voltage battery;
- a low-voltage battery configured to receive the DC voltage output from the second charging circuit and to store energy delivered from the second charging circuit;
- a first switching unit connected between the high-voltage battery and an input terminal of the DC-DC conversion circuit of the second charging circuit;
- and
- a controller configured to close the first switching unit when a vehicle travels and to open the first switching unit when the vehicle is charged,
- wherein the second charging circuit further includes a power factor corrector (PFC) configured to convert the AC voltage received from the external AC power source into a DC voltage and to output the DC voltage, the PFC including a rectifier and a boost converter,
- wherein the DC-DC conversion circuit of the second charging circuit drops the DC voltage output from the PFC of the second charging circuit and outputs a DC voltage, and
- wherein one side of the first switching unit is connected to the high-voltage battery and another side of the first switching unit is connected to an input terminal of the boost converter of the PFC.
7 more elements
Dependencies are inferred from the claim text.