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Electric vehicle low-voltage storage battery charging control method and whole vehicle controller

A charging control method and low-voltage battery technology, which are applied in the field of vehicle controller and low-voltage battery charging control of electric vehicles, can solve problems such as low energy conversion efficiency, battery damage, and vehicle failure to start, so as to improve energy utilization and prolong service life. Life, the effect of preventing power loss or overcharging

Pending Publication Date: 2019-08-23
HENAN SUDA ELECTRIC AUTOMOBILE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This charging and discharging method is easy to cause damage to the battery. For example, when the low-voltage battery is seriously depleted, the DC / DC converter charges the low-voltage battery with too much current, which will cause battery damage; When the vehicle is parked for a long time and the electrical appliances are used, the power of the low-voltage battery is always in a state of depletion, which may easily lead to battery damage, and even the vehicle cannot be started in severe cases.
In addition, the temperature of the DC / DC converter rises after working for a long time, and a cooling design is required. Both the temperature rise and the cooling will cause the problem of low energy conversion efficiency

Method used

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  • Electric vehicle low-voltage storage battery charging control method and whole vehicle controller
  • Electric vehicle low-voltage storage battery charging control method and whole vehicle controller
  • Electric vehicle low-voltage storage battery charging control method and whole vehicle controller

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Embodiment Construction

[0031] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the following, in conjunction with the accompanying drawings and preferred embodiments, will describe a charging control method for a low-voltage battery of an electric vehicle and a vehicle controller according to the present invention. Its specific implementation, structure, feature and effect thereof are described in detail as follows. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0032] It should be noted that when an element is referred to as being “disposed” or “connected” to another element, it may be directly on the other element or there may be an intervening element.

[0033] Unless otherwise defined, all tec...

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Abstract

The invention relates to the technical field of electric vehicle low-voltage storage battery charging, in particular to an electric vehicle low-voltage storage battery charging control method and a whole vehicle controller. The control method comprises the following steps that whether a power battery pack is in a working state or not is judged through the whole vehicle controller according to thegear position of an ignition switch; the current voltage of a low-voltage storage battery is monitored, and the battery state of the low-voltage storage battery is judged according to the monitored current voltage; and according to the working state of the power battery pack and the battery state of the low-voltage storage battery, a DC / DC converter and / or a BMS is controlled to work to realize charging of the low-voltage storage battery. According to the working state of the power battery pack and the battery state of the low-voltage storage battery, the DC / DC converter is controlled to be started or stopped, so that the problems that the DC / DC converter works for a long time, then the temperature rises, and then the energy utilization rate is low are solved, and the energy utilization rate of the electric vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of charging a low-voltage battery of an electric vehicle, in particular to a charging control method for a low-voltage battery of an electric vehicle and a vehicle controller. Background technique [0002] With the world's energy shortage and the increasing environmental pollution, automobile manufacturers have gradually begun to seek new energy sources as the power source of automobiles. Electric energy is gradually adopted as a renewable energy source and has less environmental pollution. The performance of electric vehicles In the process of improving and gradually moving towards industrialization, how to recharge the battery and improve the energy utilization efficiency of the vehicle is an important topic in the research of electric vehicles. [0003] At present, there is no special charging and discharging management system for the low-voltage battery of electric vehicles. Generally, when the key switc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/10
CPCB60L58/10Y02T10/72Y02T10/70
Inventor 肖和萍王广超梁永林陈晓明张朋辉
Owner HENAN SUDA ELECTRIC AUTOMOBILE TECH
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