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Special inverter load testing system for direct-current charging pile

A technology of DC charging pile and load system, which is applied in the direction of measuring electrical variables, converting irreversible DC power input into AC power output, and components of electrical measuring instruments, which can solve the problems of increased cost, energy waste, and high power of charging piles. and other issues to achieve the effect of saving costs and improving utilization efficiency

Inactive Publication Date: 2020-07-24
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

[0003] However, due to the high power of the charging pile, it can usually reach 100kW or even higher, while the resistive load only converts electrical energy into heat energy, which not only causes waste of energy, but also requires an additional fan to enhance the heat dissipation capacity of the load box, which increases the cost.

Method used

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  • Special inverter load testing system for direct-current charging pile
  • Special inverter load testing system for direct-current charging pile

Examples

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Effect test

no. 1 example

[0019] As shown in the figure, the present invention includes an inverter system 1, a DC power supply 2, a control unit 3, a first contactor 4, a second contactor 5, a third contactor 6, a fourth contactor 7, a fuse 8, a shunt 9, the input ends of the first contactor 4 and the second contactor 5 are connected to the output end of the charging pile 11 through the charging socket 10, wherein the first contactor 4 is connected to the output positive end of the charging pile 11, and the second contactor 5 Connect the output negative end of the charging pile 11, the output end of the first contactor 4 is connected in series with the fuse 8 and the third contactor 6, and then connected to the input positive end of the inverter system 1, and the output end of the second contactor 5 is connected in series After the shunt 9 and the fourth contactor 7 are connected, the input negative terminal of the inverter system 1 is connected, and the output end of the inverter system 1 is connected...

no. 2 example

[0027] The difference between the second embodiment and the first embodiment is: a resistance load 14 and a lithium battery 15 are added, the positive end of the resistance load 14 is connected to the input end of the third contactor 6 through the fifth contactor 16, and the resistance load 14 The negative terminal is connected to the input terminal of the fourth contactor 7 through the sixth contactor 17, the positive terminal of the lithium battery 15 is connected to the input terminal of the third contactor 6 through the seventh contactor 18, and the negative terminal of the lithium battery 15 is connected to the input terminal of the third contactor 6 through the seventh contactor 18. The eight contactor 19 is connected to the input end of the fourth contactor 7, and the BMS system 20 is connected between the lithium battery 15, the seventh contactor 18 and the eighth contactor 19, and the BMS system 20 communicates with the control unit 3 through the CAN communication line ...

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Abstract

The invention discloses a special testing inverter load system for a direct-current charging pile, and relates to the technical field of charging piles. The system comprises a test load, a direct-current power supply, a control unit, a first contactor connected to the output positive electrode end of a charging pile and a second contactor connected to the output negative electrode end of the charging pile, and the test load is connected to the output ends of the first contactor and the second contactor; the input end of the direct-current power supply is connected to the output ends of the first contactor and the second contactor; and the control unit is respectively connected to the control ends of the first contactor and the second contactor, the control unit is in communication connection with the communication end of the direct-current power supply, the test load is an inverter system, the output end of the inverter system is connected to the input end of the charging pile, and thecontrol end of the inverter load is connected to the control unit. The inverter system can be used as a test load, can convert direct-current electric energy output by the charging pile into alternating-current electric energy, and is connected to the input end of the charging pile in parallel, so that the utilization efficiency of the electric energy is improved, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of charging piles, in particular to a special inverter load testing system for DC charging piles. Background technique [0002] During the development process of the DC charging pile, it is necessary to use a test system and a load system to perform various tests and run it with load to verify its function. In the prior art, most of the load systems used for DC charging pile testing are resistive loads. For example, a test system for electric vehicle DC charging piles disclosed in patent number: 201721248076.1, a test system, patent number: 201721248609.6 A special test load system for DC charging piles, all of which use resistance as the test load. [0003] However, due to the high power of the charging pile, usually up to 100kW or even higher, the resistive load only converts electrical energy into heat energy, which not only causes waste of energy, but also requires an additional fan to enhance the heat ...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R1/20H02M7/42
CPCG01R31/00G01R1/203H02M7/42
Inventor 陈盼陈建华田绍民黄戬
Owner 上海鼎充新能源技术有限公司