Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Charging gun protection circuit without voltage transformer

A technology of protection circuit and current transformer, applied in battery overvoltage protection, safety/protection circuit, battery overcurrent protection, etc. Miniaturized design, large space effect

Pending Publication Date: 2022-01-11
著赫(厦门)新能源技术有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing charging guns use voltage transformers and current transformers to detect voltage and current. Two kinds of transformers are used at the same time, which occupies a large volume and is not conducive to miniaturization design.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Charging gun protection circuit without voltage transformer
  • Charging gun protection circuit without voltage transformer
  • Charging gun protection circuit without voltage transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] The invention discloses a charging gun protection circuit without a voltage transformer, which includes a control circuit and a detection circuit.

[0022] The control circuit includes a single chip microcomputer U3, a controller U18 and a relay control circuit.

[0023] like figure 1 As shown, the model of the single-chip microcomputer U3 selected in this embodiment is AT32F421, the single-chip microcomputer is provided with a relay control pin (15 pins), the input pin (6 pins) of the controller U18 is connected with the relay control pin (15 pins), and the controller The output pin U18-11 drives the relay K1 control circuit, and the controller output pin U18-10 drives the relay K2 control circuit. figure 1 Conventional circuits such as a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a charging gun protection circuit without a voltage transformer. The charging gun protection circuit comprises a control circuit and a detection circuit; the detection circuit comprises a current transformer and an operational amplifier chip, one side of the current transformer penetrates through the zero line or the live line, and the other side of the current transformer is connected with the control circuit; the operational amplifier chip comprises at least four operational amplifiers, the first operational amplifier is connected with the zero line, the second operational amplifier is connected with the live line, and the first operational amplifier and the second operational amplifier transmit detected voltage to the control circuit through the second output port; the third operational amplifier provides standard voltage, the fourth operational amplifier is connected with the current transformer through a sampling resistor, and detected current is transmitted to the control circuit through a fourth output port; the control circuit is connected with a charging gun N-pole output end and a charging gun L-pole output end, and controls the on-off of the charging gun N-pole output end and the charging gun L-pole output end. According to the invention, the circuit design without the voltage transformer is adopted, so that the space and the cost are effectively saved.

Description

technical field [0001] The invention relates to the technical field of charging, in particular to a charging gun protection circuit without a voltage transformer. Background technique [0002] As the energy supply station for the operation of electric vehicles, the electric vehicle charging pile is an important supporting infrastructure necessary for the commercialization of electric vehicles. The charging gun is a device on the electric vehicle charging pile that is connected to the mains and supplies power to the electric vehicle. [0003] Existing charging guns use voltage transformers and current transformers to detect voltage and current, and two transformers are used at the same time, which occupies a large volume and is not conducive to miniaturization design. Contents of the invention [0004] The purpose of the present invention is to provide an isolated charging gun protection circuit, which can realize the detection of voltage and current, and adopts a circuit ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/62H02J7/00
CPCB60L53/62H02J7/0036H02J7/00304H02J7/00308H02J7/0029Y02T10/70Y02T10/7072Y02T90/12
Inventor 杨善进张学功颜善茂
Owner 著赫(厦门)新能源技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com