Back to results
US 2015/0306973 A1Published application
Battery charging system for electric vehicle
AssigneeE-Power Nordic AB
InventorsMorten GUNNERUD, Ronald Hedström, Mårten Ekström
Life of this patent
Estimating the term…
Abstract
A battery charging system of a vehicle and method for charging a low-voltage battery from a high-voltage battery or an external power supply are provided, where the battery charging system includes an on-board charger (OBC) to charge the low voltage battery either from the high-voltage battery or from the external power supply, and the OBC is powered either by the low-voltage battery or the external power supply.
Claims12
A battery charging system for a vehicle, comprising:
- an on-board charger configured to be connected to an external power supply, the on-board charger including a charging DC/DC converter,
- a high voltage battery connected to the output of the charging DC/DC converter, the high voltage battery configured to be charged by the on-board charger when connected to the external power supply;
- a high power DC/DC converter connected to the high voltage battery;
- a low voltage battery configured to be charged by the external power supply;
- and
- a low power DC/DC converter adapted to operate in a first and a second mode of operation, wherein the low power DC/DC converter in the first mode of operation is connected to an input of the charging DC/DC converter and in the second mode of operation is connected to an output of the charging DC/DC converter;
- wherein the low voltage battery is configured to be charged by the external power supply via the on-board charger when the low power DC/DC converter is in the first mode of operation, and configured to be charged by the high voltage battery when the low power DC/DC converter is in the second mode of operation.
4 more elements
A method for operating an on-board charger of a vehicle, comprising the steps of:
- providing an on-board charger including a charging DC/DC converter and a low power DC/DC converter adapted to operate in a first and a second mode of operation;
- providing a high voltage battery connected to the output of the charging DC/DC converter, a high power DC/DC converter connected to the high voltage battery, and a low voltage battery;
- connecting the on-board charger to an external power supply so as to charge the high voltage battery and the low voltage battery, the low voltage battery being charged when the low power DC/DC converter operates in the first mode of operation;
- and
- disconnecting the on-board charger circuit from the external power supply, wherein the low voltage battery is configured to be charged by the high voltage battery when the low power DC/DC converter operates in the second mode of operation.
2 more elements
Dependencies are inferred from the claim text.