Low-voltage battery charging control method and device

A charging control method and low-voltage battery technology, applied in battery circuit devices, circuit devices, current collectors, etc., can solve problems such as short-circuiting of positive and negative terminals of batteries, dangerous accidents, and inability of batteries to discharge externally, so as to avoid over-discharge and reduce The effect of loss

Inactive Publication Date: 2018-12-25
CH AUTO TECH CORP CO LTD
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Problems solved by technology

However, improper operation of this method will cause the positive and negative terminals of the battery to be short-circuited, resulting in dangerous accidents.
In addition, after the negative

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  • Low-voltage battery charging control method and device
  • Low-voltage battery charging control method and device
  • Low-voltage battery charging control method and device

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[0045] In order to have a clearer understanding of the technical features, objectives and effects of the invention, specific embodiments of the invention will now be described with reference to the drawings.

[0046] The inventor analyzed the existing method of charging the 12V battery when the electric vehicle was stored for a long time, and found that it has the following shortcomings:

[0047] 1. Charging the 12V battery at regular intervals will lead to: if the interval is too long, it is possible that the 12V battery has been exhausted and charging has not started. If the owner wants to use the car at this time, it will not start; or If the interval is too short, the charging process will be started frequently, which will cause the charging control module of the vehicle to start frequently, which will increase the loss of the charging control module;

[0048] 2. When charging is started, the SOC (State of Charge, remaining power) of the power battery is not considered. If the SO...

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Abstract

The invention provides a low-voltage battery charging control method and device. The method comprises the following steps: after the electric vehicle is stationary, a low-voltage battery management system detects the voltage of the low-voltage battery in real time; When the low-voltage battery management system detects that the voltage of the low-voltage battery is less than the preset charging start voltage, the vehicle control unit VCU is woken up so that the VCU wakes up the DC power supply to the DC power supply DC-DC device so that DC-DC device starts charging the low-voltage battery; Turn off the VCU wake-up when the low voltage battery management system detects that the voltage of the low voltage battery reaches the preset end-of-charge voltage. The low-voltage battery charging control method reduces the loss of the charging control module and avoids the overdischarge of the power battery.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a charging control method and device for a low-voltage storage battery. Background technique [0002] With the development of intelligence in pure electric vehicles, there are more and more electronic and electrical components. During the long-term parking and idle process of electric vehicles, the power supply equipment: 12V battery will lose power due to the existence of electrical equipment for electronic and electrical control units. , thus affecting the normal start of the vehicle, and the over-discharge of the 12V battery will also affect its own service life. [0003] In order to prevent the 12V battery from losing power when the vehicle is parked and idle for a long time, it is usually necessary to disconnect the negative terminal of the 12V battery to prevent the battery from discharging. However, improper operation of this method will cause the positive and n...

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Application Information

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IPC IPC(8): B60L1/00B60L11/18H02J7/00
CPCB60L1/00H02J7/0086
Inventor 陆群刘天鸣陆中奎
Owner CH AUTO TECH CORP CO LTD
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