US-12623558-B2 - Electric battery charging system, control method thereof, and vehicle with electric battery charging system

Abstract

Provided is an electric battery charging system, including a connector including a thermistor element configured to change a resistance value according to a temperature, a micro control unit (MCU) configured to receive a voltage varying depending on whether the connector is connected, and receive a voltage varying according to the resistance value of the thermistor element, and a vehicle charging management system (VCMS) configured to determine whether to discharge a battery based on whether the connector is connected and a temperature of the connector.

Inventors

• Kwang Moo Lee
• Dong Seok Kim

Assignees

• HYUNDAI MOTOR COMPANY
• KIA CORPORATION
• KYUNGSHIN CORP.

Dates

Publication Date

20260512

Application Date

20221021

Priority Date

20211021

Claims (20)

1. 1 . An electric battery charging system, comprising: a connector comprising a thermistor element configured to change a resistance value according to a temperature; a micro control unit (MCU) configured to receive a voltage varying depending on whether the connector is connected, and receive a voltage varying according to the resistance value of the thermistor element; and a vehicle charging management system (VCMS) configured to determine whether to discharge a battery based on whether the connector is connected and a temperature of the connector, wherein the electric battery charging system further comprises a proximity detection (PD) sensing circuit, when a PD voltage detected by the PD sensing circuit is less than or equal to a threshold voltage value, the micro control unit (MCU) determines that the connector is connected to a vehicle and a switch indicating a power button is closed.
2. 2 . The electric battery charging system of claim 1 , wherein the thermistor element comprises a negative temperature coefficient (NTC) thermistor element.
3. 3 . The electric battery charging system of claim 2 , wherein the VCMS is configured to stop discharging the battery, when a voltage varying according to a resistance value of the NTC thermistor element is less than or equal to a preset reference value.
4. 4 . The electric battery charging system of claim 1 , wherein the connector further comprises a proximity detection sensor configured to detect the voltage varying depending on whether the connector is connected.
5. 5 . The electric battery charging system of claim 1 , wherein the VCMS is configured to stop discharging the battery, when the voltage varying depending on whether the connector is connected is greater than or equal to a preset reference value.
6. 6 . The electric battery charging system of claim 3 , wherein the connector further comprises a light emitting diode (LED) configured to light up based on stop of discharge.
7. 7 . The electric battery charging system of claim 1 , wherein the connector further comprises a bimetal switch configured to cut off power according to the temperature of the connector.
8. 8 . The electric battery charging system of claim 1 , wherein the thermistor element is sealed inside the connector to prevent ingress of moisture.
9. 9 . A vehicle, comprising: an MCU configured to receive a voltage varying depending on whether a connector is connected, and comprise a thermistor element that changes a resistance value according to a temperature and receive a voltage varying according to the resistance value of the thermistor element; and a VCMS configured to determine whether to discharge a battery based on whether the connector is connected and a temperature of the connector, wherein the vehicle further comprises a proximity detection (PD) sensing circuit, when a PD voltage detected by the PD sensing circuit is less than or equal to a threshold voltage value, the MCU determines that the connector is connected to the vehicle and a switch indicating a power button is closed.
10. 10 . The vehicle of claim 9 , wherein the thermistor element comprises a NTC thermistor element.
11. 11 . The vehicle of claim 10 , wherein the VCMS is configured to stop discharging the battery, when a voltage varying according to a resistance value of the NTC thermistor element is less than or equal to a preset reference value.
12. 12 . The vehicle of claim 9 , wherein the connector further comprises a proximity detection sensor configured to detect the voltage varying depending on whether the connector is connected.
13. 13 . The vehicle of claim 9 , wherein the VCMS is configured to stop discharging the battery, when the voltage varying depending on whether the connector is connected is greater than or equal to a preset reference value.
14. 14 . The vehicle of claim 11 , wherein the connector further comprises a LED configured to light up based on stop of discharge.
15. 15 . The vehicle of claim 9 , wherein the connector further comprises a bimetal switch configured to cut off power according to the temperature of the connector.
16. 16 . The vehicle of claim 9 , wherein the thermistor element is sealed inside the connector to prevent ingress of moisture.
17. 17 . A control method of an electric battery charging system, the control method comprising: receiving a voltage varying depending on whether a connector is connected, the connector comprising a thermistor element configured to change a resistance value according to a temperature; receiving a voltage varying according to the resistance value of the thermistor element; determining whether the connector is connected and a temperature of the connector; and determining whether to discharge a battery based on whether the connector is connected and the temperature of the connector, wherein when a proximity detection (PD) voltage detected by a PD sensing circuit is less than or equal to a threshold voltage value, the method comprises determining that the connector is connected to a vehicle and a switch indicating a power button is closed.
18. 18 . The control method of claim 17 , further comprising: when the thermistor element is an NTC thermistor element and a voltage varying by the NTC thermistor element is less than or equal to a preset reference value, stopping discharge.
19. 19 . The control method of claim 17 , further comprising: detecting, by a proximity detection sensor comprised in the connector, the voltage varying depending on whether the connector is connected; and when the detected voltage is greater than or equal to a preset reference voltage, determining that the connector is disconnected and stopping discharge.
20. 20 . The control method of claim 18 , wherein the connector further comprises a LED configured to light up based on stop of discharge.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2021-0140992, filed on Oct. 21, 2021 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. 1. Technical Field The disclosure relates to an electric battery charging system, a control method thereof, and a vehicle with the electric battery charging system. 2. Background In general, an electric vehicle refers to a means of transportation travelling on the road or rail using electricity. It is a global tendency that the capacity of electric vehicle battery increases to more than 100 khw to improve a driving range of an electric vehicle. Therefore, electric vehicles are at the center of public attention as an energy storage system (ESS). Accordingly, research on electric vehicles equipped with the vehicle to load (V2L) function that transfers energy stored in a high voltage battery in the vehicle to an external power system is being conducted. SUMMARY An aspect of the disclosure provides an electric battery charging system, a control method thereof, and a vehicle with the electric battery charging system that may determine whether to discharge a battery by determining whether a connector is connected and a temperature of the connector. Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure. According to an embodiment of the disclosure, there is provided an electric battery charging system, including: a connector including a thermistor element configured to change a resistance value according to a temperature; a micro control unit (MCU) configured to receive a voltage varying depending on whether the connector is connected, and receive a voltage varying according to the resistance value of the thermistor element; and a vehicle charging management system (VCMS) configured to determine whether to discharge a battery based on whether the connector is connected and a temperature of the connector. The thermistor element includes a negative temperature coefficient (NTC) thermistor element. The VCMS is configured to stop discharging the battery, when a voltage varying according to a resistance value of the NTC thermistor element is less than or equal to a preset reference value. The connector further includes a proximity detection sensor configured to detect the voltage varying depending on whether the connector is connected. The VCMS is configured to stop discharging the battery, when the voltage varying depending on whether the connector is connected is greater than or equal to a preset reference value. The connector further includes a light emitting diode (LED) configured to light up based on stop of discharge. The connector further includes a bimetal switch configured to cut off power according to the temperature of the connector. The thermistor element is sealed inside the connector to prevent ingress of moisture. According to an embodiment of the disclosure, there is provided a vehicle, including: an MCU configured to receive a voltage varying depending on whether a connector is connected, and include a thermistor element that changes a resistance value according to a temperature and receive a voltage varying according to the resistance value of the thermistor element; and a VCMS configured to determine whether to discharge a battery based on whether the connector is connected and a temperature of the connector. The thermistor element includes a NTC thermistor element. The VCMS is configured to stop discharging the battery, when a voltage varying according to a resistance value of the NTC thermistor element is less than or equal to a preset reference value. The connector further includes a proximity detection sensor configured to detect the voltage varying depending on whether the connector is connected. The VCMS is configured to stop discharging the battery, when the voltage varying depending on whether the connector is connected is greater than or equal to a preset reference value. The connector further includes a LED configured to light up based on stop of discharge. The connector further includes a bimetal switch configured to cut off power according to the temperature of the connector. The thermistor element is sealed inside the connector to prevent ingress of moisture. According to an embodiment of the disclosure, there is provided a control method of an electric battery charging system, the control method including: receiving a voltage varying depending on whether a connector is connected, the connector including a thermistor element configured to change a resistance value according to a temperature; receiving a voltage varying according to the resistance value of the thermistor element; determining whether the connector is connected and a temperature of the connector; and d