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Charging gun head protection circuit for DC charging pile

A technology of DC charging pile and protection circuit is applied in the field of charging gun head protection circuit, gun lock protection closed-loop circuit, and over-temperature detection alarm stop circuit. , Improve adaptability and work stability

Pending Publication Date: 2019-03-12
SOYEA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, during the charging process, due to the large current flowing through the interface between the gun and the car end, if the contact is not complete, it may cause damage to the car and the charging pile, or even a fire. Therefore, the temperature detection circuit of the gun head must exist.

Method used

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  • Charging gun head protection circuit for DC charging pile
  • Charging gun head protection circuit for DC charging pile
  • Charging gun head protection circuit for DC charging pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The protection circuit of a charging gun head of a DC charging pile described in this embodiment includes a gun lock protection circuit, a feedback selection circuit and a temperature detection circuit, and is characterized in that the gun lock protection circuit mainly includes a chip L298P, and the chip L298P outputs Two sets of H-bridge circuits control the gun head lock, and display the gun head lock status through resistors and LEDs; the feedback selection circuit is composed of an optocoupler, a triode and a code switch; the temperature detection circuit is provided by the power supply module REF3140 Stabilize the voltage, and the two arms of the bridge composed of two resistors are connected to the thermal resistor PT1000 and output the signal through the operational amplifier OPA207.

[0015] Such as figure 1 As shown, the 4 outputs of the chip L298P in the gun lock protection circuit are respectively defined as LOCK1-, LOCK1+, LOCK2-, LOCK2+, and the 4 outputs ...

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PUM

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Abstract

The invention discloses a charging gun head protection circuit for a DC charging pile. The action of a gun head lock is mainly controlled through an H bridge circuit, and meanwhile the action state ofthe gun head lock is fed back to the charging pile through a feedback circuit to form a closed-loop control circuit. A gun head temperature detection circuit mainly ensures that the charging processprevents bad contact or the over-current carrying capacity of a gun wire through the temperature detection at the interface between the charging pile and a vehicle in order to further protect the safety of the whole charging process. At the same time, a dial switch and related peripheral circuits are designed according to the feedback signals of different manufacturers to form a voltage inversioncircuit, thereby improving the adaptability of the circuit. In summary, the protection circuit has the characteristics of modular design, safety, reliability and stable work.

Description

technical field [0001] The patent of the present invention relates to a charging gun head protection circuit of a DC charging pile, specifically relates to a gun lock protection closed-loop circuit, an over-temperature detection alarm stop circuit, and belongs to the technical field of DC charging piles. Background technique [0002] With the rapid development of the electric vehicle industry and the continuous popularization of electric vehicles, the number of DC charging piles for electric vehicles in its supporting facilities continues to increase. There are not many problems in the actual use process, especially the safety of charging piles. Take security measures. When the electric vehicle is charging, it is necessary to prevent other users from arbitrarily plugging and unplugging the charging gun wire, which will affect the charging time of the user and may cause potential safety hazards. Therefore, a gun lock protection circuit is designed. During the charging proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H5/04H02H1/00B60L53/62
CPCH02H1/0007H02H5/041Y02T10/72Y02T10/7072Y02T10/70Y02T90/12
Inventor 金自鹏严振东姚丹丹
Owner SOYEA TECH