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A commutation protection circuit for an electric vehicle, a commutation protection method and an electric vehicle

A technology for electric vehicles and protection circuits, applied in electric vehicles, battery circuit devices, circuit devices, etc.

Active Publication Date: 2019-02-01
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, it is possible to realize mutual charging of two electric vehicles, that is, to charge the other electric vehicle through the power battery of one of the electric vehicles, but in the prior art, when one of the electric vehicles is fully When one or some insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, IGBT) in the bridge circuit are overheated or damaged, the electric vehicle will directly end the power feeding and charging

Method used

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  • A commutation protection circuit for an electric vehicle, a commutation protection method and an electric vehicle
  • A commutation protection circuit for an electric vehicle, a commutation protection method and an electric vehicle
  • A commutation protection circuit for an electric vehicle, a commutation protection method and an electric vehicle

Examples

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Effect test

no. 1 example

[0038] See figure 1 , which shows the schematic circuit diagram of the first electric vehicle charging the second electric vehicle provided by the embodiment of the present invention. The first embodiment of the present invention provides a commutation protection circuit for the electric vehicle, which is applied to the first electric vehicle , the commutation protection circuit may include:

[0039] The first control panel 110 is used to communicate with the second control panel 210 of the second electric vehicle, and send to the second control panel 210 the insulated gate bipolar type of the bridge arm in the first full bridge circuit 120 of the first electric vehicle. The fault information of the transistor IGBT, or obtain the fault information of the IGBT of the bridge arm in the second full bridge circuit 220 of the second electric vehicle through the second control panel 210;

[0040] The first full bridge circuit 120 electrically connected to the first control panel 11...

no. 2 example

[0056] See figure 1 , the second embodiment of the present invention provides a phase-commutation protection circuit for an electric vehicle, which is applied to a second electric vehicle. The phase-commutation protection circuit may include:

[0057] The second control panel 210 is used to communicate with the first control panel 110 of the first electric vehicle, and send to the first control panel 110 the insulated gate bipolar type of the bridge arm in the second full bridge circuit 220 of the second electric vehicle. The fault information of the transistor IGBT, or obtain the fault information of the IGBT of the bridge arm in the first full bridge circuit 120 of the first electric vehicle through the first control panel 110;

[0058] The second full bridge circuit 220 electrically connected to the second control panel 210 includes: a third bridge arm 221 including a third IGBT and a fourth bridge arm 222 including a fourth IGBT, the third bridge arm 221 and the fourth bri...

no. 3 example

[0072] See figure 2 , which shows a schematic flow chart of the phase-commutation protection method applied to the first electric vehicle provided by the embodiment of the present invention. The third embodiment of the present invention provides a phase-commutation protection method of the electric vehicle, which is applied to the first electric vehicle , the commutation protection method may include the following steps:

[0073] Step S201, sending fault information of the IGBT of the bridge arm in the first full-bridge circuit of the first electric vehicle to the second control panel;

[0074] Step S202, when it is determined that the first IGBT or the second IGBT is faulty, switching between the conducting bridge arm and the non-conducting bridge arm of the faulty IGBT in the first full bridge circuit.

[0075]In the above-mentioned embodiment, both the first electric vehicle and the second electric vehicle have the V2G function, and when charging the second electric vehic...

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Abstract

The present invention provides an electric car commutation protection circuit, a commutation protection method and an electric car. The electric car commutation protection circuit comprises a first control panel configured to perform communication connection with the second control panel of a second electric car and send the fault information of the IGBT in a first full-bridge circuit to the second control panel or obtain the fault information of the IGBT of the bridge arm in the second full bridge circuit through the second control panel; and a first full bridge circuit electrically connected with the first control panel consisting of a first bridge am including a first IGBT and a second bridge arm including a second IGBT. The first control panel is also configured to switch the conduction bridge arm having the IGBT with faults and the bridge arm without conduction in the first full bridge circuit when determining the first IGBT or the second IGBT has faults. Therefore, the first electric car can normally supply powers to the second electric car so as to solve the problem that the charging cannot be continuously performed when the IGBT of the conduction bridge arm in the first full bridge circuit has faults.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a phase-commutation protection circuit of an electric vehicle, a phase-commutation protection method and the electric vehicle. Background technique [0002] Electric vehicles can be charged by the power grid through their power batteries, and can also be used as a mobile power supply to charge other electric vehicles or provide power to other external electrical equipment such as household equipment. In the prior art, it is possible to realize mutual charging of two electric vehicles, that is, to charge the other electric vehicle through the power battery of one of the electric vehicles, but in the prior art, when one of the electric vehicles is fully When one or some insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, IGBT) in the bridge circuit are overheated or damaged, the electric vehicle will directly stop feeding and charging. Contents of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02M3/155
CPCH02J7/342H02M3/155
Inventor 张俊刘立志蒋荣勋
Owner BEIJING ELECTRIC VEHICLE
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