Electric vehicle wireless charging metal foreign matter detection system and method

A metal foreign object, wireless charging technology, applied in electric vehicle charging technology, electric vehicles, charging stations, etc., can solve problems such as equipment and personnel safety hazards, and achieve the effect of improving safety and eliminating safety hazards.

Pending Publication Date: 2021-06-18
上海鼎充新能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cause equipment and personnel safety hazards, metal foreign objects need to be detected before high-power power transmission

Method used

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  • Electric vehicle wireless charging metal foreign matter detection system and method
  • Electric vehicle wireless charging metal foreign matter detection system and method
  • Electric vehicle wireless charging metal foreign matter detection system and method

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Experimental program
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Embodiment Construction

[0019] like Figure 1-4 As shown, the present invention discloses a metal foreign object detection system for electric vehicle wireless charging, which is used to detect metal foreign objects on the charging coil module 1 (that is, the transmitting coil used for charging electric vehicles) installed on the ground, including a processor 2. The resonant circuit 3, the voltage sampling circuit 4, the power supply 5 and a plurality of foreign object detection coil modules L1, the foreign object detection coil modules L1 are arranged in a matrix on the charging coil module 1, and the connection between two adjacent charging coil modules L1 The distance is 5-7mil (mil), and the foreign object detection coil module L1 is connected to the resonant circuit 3 through the relay K11, and is also connected to the voltage sampling circuit 4 through the relay S11, the control terminals of the relays K11 and S11, and the voltage sampling circuit 4 The signal output terminals are respectively ...

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Abstract

The invention discloses an electric vehicle wireless charging metal foreign matter detection system and method, and relates to the technical field of electric vehicle wireless charging. The system comprises a processor, a resonance circuit, a voltage sampling circuit, a power supply and a plurality of foreign matter detection coil modules arranged on a charging coil module at intervals, the foreign matter detection coil modules are separately connected with the resonance circuit through a relay K11 and connected with the voltage sampling circuit through a relay S11, the control ends of the relays K11 and S11 and the signal output end of the voltage sampling circuit are respectively connected with the processor, and the power supply is respectively connected with the resonance circuit and the processor. According to the scheme, the resonance voltage amplitude difference characteristic of the foreign matter detection coil module is utilized, the size and the existing position condition of the metal foreign matter are distinguished by sampling the amplitude difference of the voltage, the wireless charging safety of the electric vehicle can be improved, and potential safety hazards are eliminated.

Description

technical field [0001] The invention relates to the technical field of electric vehicle wireless charging, in particular to an electric vehicle wireless charging metal foreign object detection system and detection method. Background technique [0002] Based on the current high-power wireless charging of electric vehicles with high safety requirements, when the transmitting coil and receiving coil transmit energy, if there are metal foreign objects (like coins, pins and other metals) on the surface or in the middle of the transmitting coil or receiving coil, the eddy current magnetic field will Cause metal heating, high temperature cause fire. It will cause potential safety hazards for equipment and personnel, and it is necessary to detect metal foreign objects before high-power electric energy transmission. To ensure that there will be no metal foreign objects that cause safety hazards on the surface of the transmitting coil or receiving coil, combined with the above situat...

Claims

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Application Information

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IPC IPC(8): H02J50/60B60L53/12
CPCH02J50/60B60L53/12Y02T10/70Y02T10/7072Y02T90/14
Inventor 高慧安董冰刘奔黄戬田绍民杨沛宇
Owner 上海鼎充新能源技术有限公司
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