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Vehicle-mounted end parallel protection circuit applicable to LCL/ LCC topology wireless charging system

A technology for wireless charging and protection circuits, applied in battery circuit devices, charging stations, electric vehicles, etc., can solve the problems of inability to ensure the safety of the vehicle end and the inability to remove the vehicle end, and achieve fast protection action, low investment cost, and reliability. strong effect

Active Publication Date: 2019-04-09
JIANGSU ELECTRIC POWER CO +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the protection of the electric vehicle wireless charging system is generally issued by the vehicle terminal to the ground terminal, and then the power supply is turned off. This method requires response time, and the vehicle terminal cannot be removed from the charging system quickly. The safety of the vehicle side of the charging system

Method used

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  • Vehicle-mounted end parallel protection circuit applicable to LCL/ LCC topology wireless charging system

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Embodiment Construction

[0013] The vehicle-side parallel protection circuit suitable for the LCL / LCC topology wireless charging system proposed by this application is as follows: figure 1 As shown, it includes: a voltage sensor, a current sensor, a protection control circuit, and a relay. The protection control circuit includes: a comparator 1, a comparator 2, a MOS tube, and a wireless communication module 1. The relay is a normally open switch relay.

[0014] The voltage sensor and the current sensor collect the charging voltage and charging current of the vehicle battery respectively. The output terminal of the current sensor is connected to the + terminal of comparator 1, and the - terminal of comparator 1 is the set overcurrent protection value; the output terminal of the voltage sensor is connected to To the + terminal of comparator 2, the - terminal of comparator 2 is the set overvoltage protection value; the output terminals of comparator 1 and comparator 2 are connected to the G pole of the M...

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Abstract

The invention discloses a vehicle-mounted end parallel protection circuit applicable to an LCL / LCC topology wireless charging system, and belongs to the technical field of wireless charging and safecharging of electric automobiles. The protection circuit comprises a voltage sensor, a current sensor, a protection control circuit and a relay, wherein a normally-opened relay is connected in parallel with the output end of an LCL / LCC topology; the protection control circuit is used for determining whether overvoltage or overcurrent occurs in the charging process based on the acquired vehicle-mounted electric charging voltage and the charging current so as to control the switching state of the relay; and moreover, the protection control circuit further comprises a wireless communication module for sending an instruction of starting or stopping power supplying to a power supply at the ground. The protection circuit is applicable to a wireless charging system needing quick protection response; in case of abnormal conditions such as overcurrent and overvoltage in the charging process of the electric automobile, the protection is carried out timely, so that the safety of the whole systemis ensured; and the protection circuit is low in input cost, high in reliability of a control method, and high in practicability.

Description

technical field [0001] The invention discloses a vehicle-mounted parallel protection circuit suitable for an LCL / LCC topology wireless charging system, and belongs to the technical field of electric vehicle wireless charging and safe charging. Background technique [0002] With the rapid development of electric vehicles, the wireless charging technology of electric vehicles has been applied. It does not need to be charged by plugging and unplugging the charging gun. After the electric vehicle arrives at the designated charging area, it sends a charging command to the ground power supply through the wireless communication module. It can be charged immediately, and the wireless charging system will be cut off automatically after the battery is fully charged. How to ensure the charging safety of electric vehicles and how to cut off the wireless charging system in time when there are abnormal conditions such as overvoltage and overcurrent has become a hot issue studied by expert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/60B60L53/66B60L53/12H02J7/00
CPCH02J7/0085H02J7/0086Y02T10/70Y02T10/7072Y02T90/12Y02T90/14Y02T90/16
Inventor 翟学锋王金虎郑海雁王成亮徐妍杨庆胜黄郑王灿黄学良谭林林张铭
Owner JIANGSU ELECTRIC POWER CO
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