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An active discharge control circuit and an automobile

A technology of discharge control and discharge control signal, which is applied in the field of automobiles and can solve problems such as poor safety

Active Publication Date: 2018-12-11
BEIJING ELECTRIC VEHICLE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide an active discharge control circuit and an automobile, which solves the problem of poor safety in the current method for actively discharging the MCU of an electric vehicle

Method used

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  • An active discharge control circuit and an automobile
  • An active discharge control circuit and an automobile
  • An active discharge control circuit and an automobile

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Embodiment Construction

[0044] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0045] Such as figure 1 As shown, the embodiment of the present invention provides an active discharge control circuit, including a charge control sub-circuit 1, an energy storage sub-circuit 2, a discharge control sub-circuit 3 and a discharge sub-circuit 4, wherein,

[0046] The output terminal of the charging control subcircuit 1 is connected to the energy storage subcircuit 2, and the charging control subcircuit 1 is used to receive a discharge signal through its input terminal, and after receiving the discharge signal, through the output The terminal provides a charging signal for the input terminal of the energy storage sub-circuit 2, so as to charge the energy storage sub-circuit 2, thereby increasing the voltage of the output terminal of the ener...

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Abstract

The invention provides an active discharge control circuit and an automobile. The circuit includes a charge control subcircuit, energy storage sub-circuit, A discharge control sub-circuit and a discharge circuit, wherein an output end of the charging control sub-circuit is connected with the energy storage sub-circuit, The charging control sub-circuit is used for receiving a discharge signal through an input terminal of the charging control sub-circuit, and after receiving the discharge signal, the charging control sub-circuit provides a charging signal to the input terminal of the energy storage sub-circuit through the output terminal to charge the energy storage sub-circuit, thereby increasing the voltage at the output terminal of the energy storage sub-circuit; The discharge control sub-circuit is connected with the output terminal of the energy storage sub-circuit, and is used for outputting a discharge control signal to the discharge circuit after the voltage at the output terminal of the energy storage sub-circuit is greater than a predetermined reference voltage. The discharging circuit is configured to control the device to be discharged to discharge after receiving the discharge control signal. In this way, the safety of the active discharge control circuit can be improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an active discharge control circuit and an automobile. Background technique [0002] In order to ensure personal safety, the Microcontroller Unit (MCU) needs to be actively discharged when the electric vehicle is parked and powered off, and the national standard requires that the charge stored in the DC_LINK of the motor controller be completely discharged within 3ms. freed. At present, most of the industry uses software to control the insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, referred to as IGBT) switch to complete the discharge through the motor winding. However, using this method requires precise control by the software, otherwise there is a risk of burning out the IGBTs, in addition to causing the motor to heat up. Therefore, the current method for actively discharging the MCU of the electric vehicle has poor safety. Contents of the inventi...

Claims

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Application Information

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IPC IPC(8): H02M1/32
CPCH02M1/32H02M1/322
Inventor 武盼盼
Owner BEIJING ELECTRIC VEHICLE
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