Control method of on-board charger

A vehicle-mounted charger and control method technology, applied in electric vehicle charging technology, charging stations, battery/fuel cell control devices, etc., can solve problems such as power grid interruption or power supply interruption, inconvenient use, and reduced user experience, and achieve Improvement of ease of use and reduction of intervention

Active Publication Date: 2019-07-30
湖南猎豹汽车股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many current slow charging and charging control strategies cannot deal with the situation that the grid is interrupted or the power supply is interrupted during the slow charging process, and the vehicle is automatically restored and restarted for charging.
When using slow charging, it is also limited by the state of the car key, the time interval between the charging gun connecting the vehicle and the grid, etc., the charging work cannot be performed, and it is very inconvenient to use
In the safe use state, more user intervention and user operation specifications are required, which greatly reduces the user experience

Method used

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  • Control method of on-board charger

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Embodiment Construction

[0026] According to the following different user usage scenarios, the present invention provides the following charging schemes:

[0027] 1. During the charging process of slow charging, if the mains power fails and then calls again, without manual intervention to re-plug and unplug the charging gun, the vehicle can perform slow charging again. The scheme is as follows:

[0028] The state of the vehicle key is in the OFF gear, during the slow charging process (not fully charged), the mains power suddenly cuts off, and only CC (Connection Confirm charging gun connection confirmation) exists (that is, the slow charging gun is normally connected to the car), the BMS (Battery Management System battery management system) After automatic sleep, the BMS wakes up once every 15 minutes through the internal rtc clock, and detects the CP (Clock Pulse clock pulse) signal after self-awakening to determine whether the mains power is available, and self-awakens and detects In the CP phase, ...

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Abstract

The invention discloses a control method of an on-board charger. The control method comprises the following steps that when a charging gun is connected with the charger and no power is supplied, a battery management system (BMS) enters into a dormant state, an internal real-time clock (RTC) is used for awakening the BMS once every first preset time, whether power supply is restored or not is judged by detecting CP signals after self-awakening, when the CP signals are detected, power supply is restored, and otherwise, the BMS enters into the dormant state again until the CP signals are detectedafter the next time of self-awakening and charging is restored. The control method has the technical effects that at the aspects of slow charging use convenience and charging rebooting in the slow charging process, the intervention degree of a user is greatly reduced and the using convenience of the user is improved on the premise that the use safety of the user is ensured.

Description

technical field [0001] The invention relates to a method for controlling a vehicle charger. Background technique [0002] At present, the slow charging time of mainstream electric vehicles is generally longer, with an average of about 8 hours. And in the actual use process, the charging scene is very complicated. The determination of the charging status of the plug-in gun needs to consider the user's normal use to maximize the user's charging convenience. At the same time, it also needs to consider the user's safety during use. Many current slow-charging and charging control strategies cannot address the situation that the grid is interrupted or the power supply is interrupted during the slow-charging process, and the vehicle is automatically restored and restarted for charging. When using slow charging, it is also limited by the state of the car key, the time interval between the charging gun connecting the vehicle and the grid, and other conditions. The charging work cann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/16B60L53/60B60L53/00B60L58/10
CPCB60L53/16B60L53/60B60L53/00B60L58/10Y02T90/14
Inventor 王元林黄伟贺四清刘小华张桂连
Owner 湖南猎豹汽车股份有限公司
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