Battery charging system and charging method using same
First Claim
1. A battery charging system comprising:
- a first connector connected to both ends of a battery of a charge providing car;
a second connector connected to both ends of a battery of a charging target car;
a converter connected between the first connector and the second connector and configured to convert a voltage transmitted from the battery of the charge providing car through the first connector and transmit the converted voltage to the battery of the charging target car through the second connector;
a controller configured to control an electrical connection of the first connector and the second connector and connected to each of a battery management system (BMS) of the charge providing car and a BMS of the charging target car to control a voltage conversion ratio of the converter based on battery state information on the batteries transmitted from the BMSs of the charge providing car and the charging target car, respectively,wherein the first connector comprises;
a first positive electrode relay configured to connect all of;
a positive electrode of the battery of the charge providing car,a positive electrode of a relay unit of the charge providing car connected between the positive electrode of the battery of the charge providing car and a positive electrode of a motor of the charge providing car, wherein the positive electrode of the battery of the charge providing car is indirectly connected to the positive electrode of the motor of the charge providing car via a positive electrode of a direct current-alternating current (DC-AC) inverter of the charge providing car, anda positive electrode of an input terminal of the converter;
a first negative electrode relay configured to connect all of;
a negative electrode of the battery of the charge providing car,a negative electrode of a relay unit of the charge providing car connected between the negative electrode of the battery of the charge providing car and a negative electrode of the motor of the charge providing car, wherein the negative electrode of the battery of the charge providing car is indirectly connected to the negative electrode of the motor of the charge providing car via a negative electrode of the DC-AC inverter of the charge providing car, anda negative electrode of the input terminal of the converter; and
a first precharge unit connected to the first positive electrode relay in parallel, the first precharge unit including a first precharge relay and a first precharge resistor connected to the first precharge relay in series;
a first capacitive element connected to the input terminal of the converter in parallel, and connected between the converter and the first connector that includes the first positive and first negative electrode relays, both of the first connector and the first capacitive element being connected in parallel with both of the battery and the motor of the charge providing car,wherein the second connector comprises;
a second positive electrode relay configured to connect all of;
a positive electrode of the battery of the charging target car,a positive electrode of a relay unit of the charging target car connected between the positive electrode of the battery of the charging target car and a positive electrode of a motor of the charging target car, wherein the positive electrode of the battery of the charging target car is indirectly connected to the positive electrode of the motor of the charging target car via a positive electrode of a DC-AC inverter of the charging target car, anda positive electrode of an output terminal of the converter;
a second negative electrode relay configured to connect all of;
a negative electrode of the battery of the charging target car,a negative electrode of a relay unit of the charging target car connected between the negative electrode of the battery of the charging target car and a negative electrode of the motor of the charging target car, wherein the negative electrode of the battery of the charging target car is indirectly connected to the negative electrode of the motor of the charging target car via a negative electrode of the DC-AC inverter of the charging target car, anda negative electrode of the output terminal of the converter; and
a second precharge unit connected to the second positive electrode relay in parallel, the second precharge unit including a second precharge relay and a second precharge resistor connected to the second precharge relay in series;
a second capacitive element connected to the output terminal of the converter in parallel, and connected between the converter and the second connector that includes the second positive and second negative electrode relays, both of the second connector and the second capacitive element being connected in parallel with both of the battery and the motor of the charging target car; and
a display unit connected to the controller and configured to;
display a transmitted power quantity provided to the battery of the charging target car from the battery of the charge providing car, anddisplay, in real time, a power rate calculated based on the transmitted power quantity,wherein the first connector, the second connector, the converter, the controller, the first precharge unit, the first capacitive element, the second precharge unit, the second capacitive element, and the display unit are all included in the battery charging system, which is a single system connected to, and separate from, the charge providing car and charging target car.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed are a battery charging system and method. The battery charging system according to the present invention includes a first connector connected to both ends of a battery of a charging providing car; a second connector connected to both ends of a battery of a charging target car; a converter configured to convert a voltage transmitted from the battery of the charging providing car through the first connector and transmit the converted voltage to the battery of the charging target car through the second connector; and a controller connected to each of a battery management system (BMS) of the charging providing car and a BMS of the charging target car to control a voltage conversion ratio of the converter based on a state information on each of the batteries transmitted from each of the BMSs.
20 Citations
20 Claims
-
1. A battery charging system comprising:
-
a first connector connected to both ends of a battery of a charge providing car; a second connector connected to both ends of a battery of a charging target car; a converter connected between the first connector and the second connector and configured to convert a voltage transmitted from the battery of the charge providing car through the first connector and transmit the converted voltage to the battery of the charging target car through the second connector; a controller configured to control an electrical connection of the first connector and the second connector and connected to each of a battery management system (BMS) of the charge providing car and a BMS of the charging target car to control a voltage conversion ratio of the converter based on battery state information on the batteries transmitted from the BMSs of the charge providing car and the charging target car, respectively, wherein the first connector comprises; a first positive electrode relay configured to connect all of; a positive electrode of the battery of the charge providing car, a positive electrode of a relay unit of the charge providing car connected between the positive electrode of the battery of the charge providing car and a positive electrode of a motor of the charge providing car, wherein the positive electrode of the battery of the charge providing car is indirectly connected to the positive electrode of the motor of the charge providing car via a positive electrode of a direct current-alternating current (DC-AC) inverter of the charge providing car, and a positive electrode of an input terminal of the converter; a first negative electrode relay configured to connect all of; a negative electrode of the battery of the charge providing car, a negative electrode of a relay unit of the charge providing car connected between the negative electrode of the battery of the charge providing car and a negative electrode of the motor of the charge providing car, wherein the negative electrode of the battery of the charge providing car is indirectly connected to the negative electrode of the motor of the charge providing car via a negative electrode of the DC-AC inverter of the charge providing car, and a negative electrode of the input terminal of the converter; and a first precharge unit connected to the first positive electrode relay in parallel, the first precharge unit including a first precharge relay and a first precharge resistor connected to the first precharge relay in series; a first capacitive element connected to the input terminal of the converter in parallel, and connected between the converter and the first connector that includes the first positive and first negative electrode relays, both of the first connector and the first capacitive element being connected in parallel with both of the battery and the motor of the charge providing car, wherein the second connector comprises; a second positive electrode relay configured to connect all of; a positive electrode of the battery of the charging target car, a positive electrode of a relay unit of the charging target car connected between the positive electrode of the battery of the charging target car and a positive electrode of a motor of the charging target car, wherein the positive electrode of the battery of the charging target car is indirectly connected to the positive electrode of the motor of the charging target car via a positive electrode of a DC-AC inverter of the charging target car, and a positive electrode of an output terminal of the converter; a second negative electrode relay configured to connect all of; a negative electrode of the battery of the charging target car, a negative electrode of a relay unit of the charging target car connected between the negative electrode of the battery of the charging target car and a negative electrode of the motor of the charging target car, wherein the negative electrode of the battery of the charging target car is indirectly connected to the negative electrode of the motor of the charging target car via a negative electrode of the DC-AC inverter of the charging target car, and a negative electrode of the output terminal of the converter; and a second precharge unit connected to the second positive electrode relay in parallel, the second precharge unit including a second precharge relay and a second precharge resistor connected to the second precharge relay in series; a second capacitive element connected to the output terminal of the converter in parallel, and connected between the converter and the second connector that includes the second positive and second negative electrode relays, both of the second connector and the second capacitive element being connected in parallel with both of the battery and the motor of the charging target car; and a display unit connected to the controller and configured to; display a transmitted power quantity provided to the battery of the charging target car from the battery of the charge providing car, and display, in real time, a power rate calculated based on the transmitted power quantity, wherein the first connector, the second connector, the converter, the controller, the first precharge unit, the first capacitive element, the second precharge unit, the second capacitive element, and the display unit are all included in the battery charging system, which is a single system connected to, and separate from, the charge providing car and charging target car. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 19, 20)
-
-
9. A battery charging method comprising:
-
providing, in a first connector, a first positive electrode relay configured to connect all of; a positive electrode of a battery of a providing car, a positive electrode of a relay unit of the charge providing car connected between the positive electrode of the battery of the charge providing car and a positive electrode of a motor of the charge providing car, wherein the positive electrode of the battery of the charge providing car is indirectly connected to the positive electrode of the motor of the charge providing car via a positive electrode of a direct current-alternating current (DC-AC) inverter of the charge providing car, and a positive electrode of an input terminal of a converter; providing, in the first connector, a first negative electrode relay configured to connect all of; a negative electrode of the battery of the providing car, a negative electrode of a relay unit of the charge providing car connected between the negative electrode of the battery of the charge providing car and a negative electrode of the motor of the charge providing car, wherein the negative electrode of the battery of the charge providing car is indirectly connected to the negative electrode of the motor of the charge providing car via a negative electrode of the DC-AC inverter of the charge providing car, and a negative electrode of the input terminal of a converter; providing, in the first connector, a first precharge unit including a first precharge relay and a first precharge resistor, the first precharge unit connected to the first positive electrode relay in parallel, the first precharge resistor connected to the first precharge relay in series; providing a first capacitive element connected to the input terminal of the converter in parallel, and connected between the converter and the first connector that includes the first positive and first negative electrode relays, both of the first connector and the first capacitive element being connected in parallel with both of the battery and the motor of the charge providing car; providing, in a second connector, a second positive electrode relay configured to connect all of; a positive electrode of a battery of a charging target car, a positive electrode of a relay unit of the charging target car connected between the positive electrode of the battery of the charging target car and a positive electrode of a motor of the charging target car, wherein the positive electrode of the battery of the charging target car is indirectly connected to the positive electrode of the motor of the charging target car via a positive electrode of a DC-AC inverter of the charging target car, and a positive electrode of an output terminal of the converter; providing, in the second connector, a second negative electrode relay configured to connect all of; a negative electrode of the battery of the charging target car, a negative electrode of a relay unit of the charging target car connected between the negative electrode of the battery of the charging target car and a negative electrode of the motor of the charging target car, wherein the negative electrode of the battery of the charging target car is indirectly connected to the negative electrode of the motor of the charging target car via a negative electrode of the DC-AC inverter of the charging target car, and a negative electrode of the output terminal of the converter; providing, in the second connector, a second precharge unit including a second precharge relay and a second precharge resistor, the second precharge unit connected to the second positive electrode relay in parallel, the second precharge resistor connected to the second precharge relay in series in the battery charging system; providing a second capacitive element connected to the output terminal of the converter in parallel, and connected between the converter and the second connector that includes the second positive and second negative electrode relays, both of the second connector and the second capacitive element being connected in parallel with both of the battery and the motor of the charging target car; and providing a display unit connected to a controller and configured to; display a transmitted power quantity provided to the battery of the charging target car from the battery of the charge providing car, and display, in real time, a power rate calculated based on the transmitted power quantity, receiving battery state information on the battery of the charge providing car and the battery the charging target car from a battery management system (BMS) of the charge providing car and a BMS of the charging target car, respectively; performing an input side precharge by connecting the first precharge relay with the first precharge resistor; performing an output side precharge by connecting the second precharge relay with the second precharge resistor; after the input side precharge ends, transmitting power to the input terminal of the converter from the battery of the charge providing car by disconnecting a connection of the first precharge relay and closing the first positive electrode relay; after the output side precharge ends, transmitting power to the battery of the charging target car from the output terminal of the converter by disconnecting a connection of the second precharge relay and closing the second positive electrode relay; and controlling a voltage conversion ratio of the converter based on the battery state information on the batteries transmitted from the BMSs of the charge providing car and the charging target car, respectively, and charging the battery of the charging target car, by the controller, wherein the first connector, the second connector, the converter, the controller, the first precharge unit, the first capacitive element, the second precharge unit, the second capacitive element, and the display unit are all included in the battery charging system, which is a single system connected to, and separate from, the charge providing car and charging target car. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
-
Specification