Method for preventing small storage battery from being fed when charging electric vehicle

A technology for electric vehicles during charging, applied in the field of electric vehicle power management, can solve problems such as stop charging, overheating of chargers, and small battery feeding, and achieve the effects of prolonging service life, alleviating heat generation, and complete and compact structural design

Pending Publication Date: 2019-03-22
SHANDONG KINGOLD AUTOMOBILE CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of existing electric vehicles that easily lead to small battery feeding when charging, and that the charging machine is easi

Method used

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  • Method for preventing small storage battery from being fed when charging electric vehicle
  • Method for preventing small storage battery from being fed when charging electric vehicle

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[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] see Figure 1-2 , the present invention provides a technical solution: a method for preventing a small battery from feeding power when an electric vehicle is charging, comprising the following steps:

[0025] (1) First, when the charging gun is plugged in, the charger wakes up the battery management system (BMS), vehicle controller (VCU) and DC-DC converter (DCDC) through hard wires.

[0026] (2) Then when the charger and the battery man...

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Abstract

The invention discloses a method for preventing a small storage battery from being fed when charging an electric vehicle, wherein when a charger is working, a battery management system (BMS) is awakened through a hard wire, at the same time, a vehicle control unit (VCU) and a direct current direct current converter (DCDC) need to be awakened. When the VCU detects that the whole vehicle is in a charging state, a pre-charge circuit of a motor controller and a main positive relay are sequentially closed, the DCDC is enabled to be in a working state by preset enabled DCDC for charging a small storage battery. When the charging process is over or finished, the enabled DCDC is controlled to close by the VCU, then the main positive relay of the motor is switched off to make the motor enter a discharging state, and after finishing discharging, the DCDC and the VCU enter a dormant state. The method has the advantages that the situation that the charger overheats during charging is relieved, theservice life of the charger is extended, the problem that the charging is stopped due to overheat of the charger in the charging process is solved, the charging time is shortened, and the situation that the small storage battery is fed due to the operation of a heat-removal system in the charging process is effectively relieved.

Description

technical field [0001] The invention relates to the technical field of electric vehicle power management, in particular to a method for preventing small storage batteries from feeding power when the electric vehicle is charging. Background technique [0002] At present, electric vehicles have been popularized in a large range. While implementing various functions of electric vehicles, major OEMs are gradually paying attention to improving the performance of the vehicle, especially the improvement of the cruising range of the vehicle. Improving the cruising range will inevitably involve the improvement of battery power and battery energy density. [0003] The increase in battery power also brings pressure to charging. If the charging current is small, the charging time will be prolonged. If the charging current is large, the cooling system of the whole vehicle is required to cool down the charger. When the on-board charger is working, in addition to converting AC power to DC...

Claims

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Application Information

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IPC IPC(8): B60L58/14
CPCY02T90/16Y02T10/72Y02T10/70
Inventor 朱刚贾少清王世良王丽伟于钦香杜杨
Owner SHANDONG KINGOLD AUTOMOBILE CO LTD
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