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A kind of electric vehicle low-voltage battery charging system and its charging method

A low-voltage battery and charging system technology, applied in electric vehicles, battery circuit devices, current collectors, etc., can solve problems such as abnormal operation of low-voltage batteries, damage to DC/DC voltage converters, affecting the normal driving of the vehicle, etc., to ensure energy Effect

Active Publication Date: 2015-12-02
ANHUI ANKAI AUTOMOBILE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the charging current is large, the DC / DC voltage converter will be damaged due to over-temperature or over-voltage, which will cause the low-voltage battery to work abnormally and affect the normal driving of the vehicle

Method used

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  • A kind of electric vehicle low-voltage battery charging system and its charging method
  • A kind of electric vehicle low-voltage battery charging system and its charging method
  • A kind of electric vehicle low-voltage battery charging system and its charging method

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with accompanying drawing:

[0036] Such as figure 1 The shown a low-voltage battery charging system for electric vehicles includes a power battery pack and a low-voltage battery, and the charging system also includes a main control loop, a voltage sampling loop, a secondary loop switch, a transformer, and a main loop control switch; the main control loop The output terminals of the secondary circuit are respectively connected with the secondary circuit switch and the main circuit control switch, the voltage sampling circuit is connected interactively with the main control circuit, the input terminal of the voltage sampling circuit is connected with the power battery pack, and the low-voltage battery is connected through the main circuit The loop control switch is connected with the transformer, and the power battery pack is connected with the transformer through the secondary loop switch. Specifical...

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Abstract

The invention relates to a charging system of low-voltage batteries of an electric automobile and a charging method of the charging system of the low-voltage batteries of the electric automobile. The charging system of the low-voltage batteries of the electric automobile comprises a main control loop, a voltage sampling loop, a power battery pack, auxiliary loop control switches, auxiliary loop gating switches, a transformer and main loop control switches, wherein the output end of the main control loop is connected with the auxiliary loop switches and the main loop control switches, the input end of the voltage sampling loop is connected with the power battery pack and the output end of the main control loop, the output end of the voltage sampling loop is connected with the input end of the main control loop, the low-voltage batteries are connected with the transformer through the main loop control switches, and the power battery pack is connected with the transformer through the auxiliary loop switches. The charging method of the low-voltage batteries of the electric automobile comprises the steps that sampling analysis is carried out on voltage values of batteries of the power battery pack, discharging is carried out on the batteries with high voltage, and charging is carried out on the batteries with low voltage. Mutual transfer between energy of the low-voltage batteries and energy of the power battery pack is achieved, and energy balance of the power battery pack is ensured.

Description

technical field [0001] The invention relates to the technical field of electric vehicle batteries, in particular to a charging system for a low-voltage battery of an electric vehicle without an on-board charger and a charging method thereof. Background technique [0002] Since entering the 21st century, energy conservation and environmental protection have become the focus of energy issues. With the rapid development of my country's automobile industry in the new century, the number of automobiles in my country is also increasing. Cars have entered people's daily life in large numbers, but the ensuing environmental problems are becoming more and more serious. Therefore, we need to develop a new path of environmental protection and energy saving for the development of the automobile industry. The emergence of electric vehicles can better solve this dilemma. Electric vehicles do not have fuel problems and vehicle exhaust emissions. Therefore, the research and development of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 吴成加王龙群张海洋
Owner ANHUI ANKAI AUTOMOBILE
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