On-board battery charger for electric vehicles and control method thereof
First Claim
1. An on-board battery charger which cooperates with a battery management system (BMS) and charges batteries by converting alternating current power input from an external charging facility into direct current power, the on-board battery charger comprising a memory and a processor, the memory configured to store program instructions and the processor configured to execute the program instructions, the program instructions when executed configured to:
- sense a voltage value of power input from the charging facility in the initial stage of charging which the charging facility is connected to charge the batteries;
receive a pulse width modulation (PWM) signal of a current value of the power from the charging facility;
calculate an output voltage value to be output to the batteries using the sensed voltage value of the input power;
calculate an output current value to be output to the batteries using a duty value of the received PWM signal; and
transmit the calculated output voltage and current values to the cooperating BMS to calculate an estimated charging time.
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Accused Products
Abstract
An on-board battery charger is provided that senses a voltage value of power input from a charging facility when the charging facility is connected to charge the batteries and receives a pulse width modulation (PWM) signal of a current value of the power from the charging facility. In addition, the charger calculates an output voltage value to be output to the batteries using the sensed voltage value of the input power and an output current value to be output to the batteries using a duty value of the received PWM signal. The charger transmits the calculated output voltage and current values to a cooperating battery management system (BMS). The BMS calculates an estimated charging time using the transmitted output voltage and current values, and information regarding the calculated estimated charging time is transmitted to an external charging facility.
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Citations
15 Claims
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1. An on-board battery charger which cooperates with a battery management system (BMS) and charges batteries by converting alternating current power input from an external charging facility into direct current power, the on-board battery charger comprising a memory and a processor, the memory configured to store program instructions and the processor configured to execute the program instructions, the program instructions when executed configured to:
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sense a voltage value of power input from the charging facility in the initial stage of charging which the charging facility is connected to charge the batteries; receive a pulse width modulation (PWM) signal of a current value of the power from the charging facility; calculate an output voltage value to be output to the batteries using the sensed voltage value of the input power; calculate an output current value to be output to the batteries using a duty value of the received PWM signal; and transmit the calculated output voltage and current values to the cooperating BMS to calculate an estimated charging time. - View Dependent Claims (2, 3, 4, 5)
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6. A control method of an on-board battery charger which cooperates with a battery management system (BMS) and charges batteries by converting alternating current power input from an external charging facility into direct current power, the control method comprising:
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sensing, by a processor, a voltage value of power input from the charging facility in the initial stage of charging which the charging facility is connected to charge the batteries; receiving, by the processor, a pulse width modulation (PWM) signal of a current value of the power from the charging facility; calculating, by the processor, an output voltage value to be output to the batteries using the sensed voltage value of the input power; calculating, by the processor, an output current value to be output to the batteries using a duty value of the received PWM signal; and transmitting, by the processor, the calculated output voltage and current values to the cooperating BMS; and receiving, by the processor, information regarding a calculated estimated charging time from the BMS, wherein the estimated charging time is calculated using the transmitted output voltage and current values. - View Dependent Claims (7, 8, 9, 10)
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11. A non-transitory computer readable medium containing program instructions executed by a processor, the computer readable medium comprising:
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program instructions that sense a voltage value of power input from the charging facility in the initial stage of charging which the charging facility is connected to charge the batteries; program instructions that receive a pulse width modulation (PWM) signal of a current value of the power from the charging facility; program instructions that calculate an output voltage value to be output to the batteries using the sensed voltage value of the input power; program instructions that calculate an output current value to be output to the batteries using a duty value of the received PWM signal; and program instructions that transmit the calculated output voltage and current values to the cooperating BMS; and program instructions that receive information regarding a calculated estimated charging time from the calculated using the transmitted output voltage and current values. - View Dependent Claims (12, 13, 14, 15)
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Specification