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Vehicle pre-charging device and vehicle

A pre-charging and vehicle technology, applied in the direction of electrical devices, vehicle components, vehicle energy storage, etc., can solve the problems of low reliability, high cost and slow response speed of logic control

Active Publication Date: 2021-03-30
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this disclosure is to provide a vehicle pre-charging device and a vehicle to solve the problems of high cost, slow response speed, and low reliability of logic control for pre-charging the load capacitor in the prior art

Method used

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  • Vehicle pre-charging device and vehicle
  • Vehicle pre-charging device and vehicle
  • Vehicle pre-charging device and vehicle

Examples

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Embodiment Construction

[0043] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0044] Before introducing the vehicle pre-charging device and the vehicle provided by the present disclosure, the application scenarios involved in the various embodiments of the present disclosure will be introduced first. This application scenario includes a vehicle equipped with a vehicle pre-charging device. The vehicle can be any vehicle that uses a power battery as an energy sour...

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Abstract

The invention relates to a vehicle pre-charging device and a vehicle, and relates to the technical field of electric vehicles; the vehicle pre-charging device comprises a first contactor, a pre-charging NMOS, a pre-charging resistor, a first control module, a second control module and a sampling module; the first control module is used for controlling the on and off of the pre-charging NMOS according to an enable signal, and pre-charging a load capacitor when the pre-charging NMOS is on; the sampling module is used for collecting voltage information of a power battery and a load capacitor andsending a control signal to the second control module according to the voltage information, and the second control module is used for controlling the first contactor to be switched on or switched offaccording to the control signal and charging the load capacitor when the first contactor is switched on. According to the invention, the NMOS is adopted to control the on-off of the pre-charging loop,the switching response speed is high, the cost is low, the logic control of the pre-charging loop is realized through the enable signal, and the reliability of the logic control of the pre-charging loop is improved.

Description

technical field [0001] The present disclosure relates to the technical field of electric vehicles, in particular, to a vehicle pre-charging device and a vehicle. Background technique [0002] With the emphasis on sustainable development, green and environmentally friendly electric vehicles have been widely used. Electric vehicles use the power battery as energy to drive the motor. When the power battery directly charges the load capacitance of the motor controller, a large inrush current will be generated, which will damage the electrical components in the charging circuit. In order to prevent the inrush current from damaging the electrical components in the charging circuit, it is necessary to precharge the load capacitor. In the prior art, precharging the load capacitor is mainly by using a DC contactor to control the on-off of the pre-charging circuit to pre-charge the load capacitor. However, using a DC contactor to control the on-off of the pre-charging circuit costs ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/00B60L58/10B60L3/00
CPCB60L53/00B60L58/10B60L3/0046Y02T10/70Y02T10/7072Y02T90/14
Inventor 石雷薛鹏辉陈明文郏春飞
Owner BYD CO LTD
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