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Electric vehicle leakage circuit, leakage method and electric vehicle

An electric vehicle and circuit technology, applied in electric vehicle charging technology, electric vehicles, battery circuit devices, etc., can solve the problems of heater, battery motor overheating, and high battery temperature

Active Publication Date: 2019-06-18
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the vehicle is shut down after a long period of operation, or after a sudden shutdown, the temperature of the battery is high. At this time, the heater is heated and the motor is powered to discharge electricity. There is a certain risk of overheating the heater, battery, and motor.

Method used

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  • Electric vehicle leakage circuit, leakage method and electric vehicle
  • Electric vehicle leakage circuit, leakage method and electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0027] Embodiments of the present invention provide a leakage circuit of an electric vehicle, such as figure 1 shown, including:

[0028] A first leakage circuit and a second leakage circuit connected in parallel with the target leakage capacitor 1 of the electric vehicle, the first leakage circuit includes a first switch 2 connected in series and a heating resistor 3 of a heater of the electric vehicle , the second leakage circuit includes a second switch 4 and a power consumption device connected in series;

[0029] A controller for controlling on and off of the first switch 2 and the second switch 4, both of the first switch 2 and the second switch 4 are electrically connected to the controller.

[0030] Wherein, the target leakage capacitor 1 is a capacitor in the motor controller. When the electric vehicle is stopped, for safety reasons, it is necessary to unload the electricity stored in the target leakage capacitor 1 . However, in the embodiment of the present invent...

no. 2 example

[0042] Embodiments of the present invention provide a leakage method for an electric vehicle, which is applied to the leakage circuit of the above-mentioned electric vehicle, such as figure 2 As shown, the method includes:

[0043] Step 201: The controller obtains the battery temperature of the battery of the electric vehicle and the motor temperature of the electric motor of the electric vehicle.

[0044]In the prior art, when the electric vehicle is stopped, the electric quantity of the target leakage capacitor is directly delivered to the heater or the motor to make it run for a period of time. However, when the temperature of the battery or the motor is high, the power of the target leakage capacitor is still delivered to the heater or the motor, which will cause the risk of overheating of the battery or the motor. However, in the embodiment of the present invention, the controller obtains the battery temperature of the battery and the motor temperature of the motor, so ...

no. 3 example

[0051] An embodiment of the present invention provides an electric vehicle, including the above electric vehicle leakage circuit. Therefore, the electric vehicle in the embodiment of the present invention can effectively avoid the risk of overheating of the heater, battery or motor through the cooperation of the first leakage circuit and the second leakage circuit when discharging the target leakage capacitor. , thereby prolonging the service life of electric vehicles and enhancing the market competitiveness of products.

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Abstract

The invention provides a discharge circuit and a discharge method for an electric vehicle and the electric vehicle. The discharge circuit of the electric vehicle comprises a first discharge circuit and a second discharge circuit which are connected with a target discharge capacitor of the electric vehicle in parallel, as well as a controller, wherein the first discharge circuit comprises a first switch and a heating resistor of a heater of the electric vehicle, and the first switch and the heating resistor are connected in series; the second discharge circuit comprises a second switch and a power consumption device which are connected in series; the controller is used for controlling switching on and off of the first switch and the second switch, and the first switch and the second switch are both electrically connected with the controller. According to the scheme, through cooperative use of the first discharge circuit and the second discharge circuit, the risk that the heater, a battery and a motor are too hot during discharge of the discharge capacitor can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a leakage circuit of an electric vehicle, a leakage method and the electric vehicle. Background technique [0002] In an electric vehicle, the DC power of the battery must be filtered by a capacitor and sent to the vehicle heater or converted into AC power through an insulated gate bipolar transistor (IGBT) to supply the motor to drive the vehicle. When the vehicle is stopped, for safety reasons, it is necessary to unload the electricity stored in these capacitors. Usually after the shutdown, the power is sent to the heater or motor to run for a period of time until the power consumption is completed. However, when the vehicle is shut down after a long period of operation, or after a sudden shutdown, the battery temperature is high. At this time, the heater is heated and the motor is powered to discharge electricity. There is a certain risk of overheating the heater,...

Claims

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Application Information

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IPC IPC(8): H02J7/00B60L53/31
CPCB60L53/00H02J7/0063H02J2007/0067Y02T10/70Y02T10/7072Y02T90/12Y02T90/14
Inventor 李炳男易迪华李从心崔天祥周金龙金硕王金龙于淙洋胡泽明龙帆刘文月
Owner BEIJING ELECTRIC VEHICLE
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