Sectional constant-current constant-voltage alternative charging method with negative pulses

A constant current and constant voltage, alternate charging technology, applied in the direction of secondary battery charging/discharging, circuits, electrical components, etc., can solve the problems of less charged power and long charging time, and achieve short charging time and high charging efficiency. , the effect of extending battery life

Active Publication Date: 2015-01-07
重庆工业赋能创新中心有限公司
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  • Abstract
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Problems solved by technology

However, there are still some areas to be improved in this method: 1. There is a relatively large gap between the charging curve of this charging method and the optimal charging curve mentioned in Maas's law. relatively long

Method used

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  • Sectional constant-current constant-voltage alternative charging method with negative pulses
  • Sectional constant-current constant-voltage alternative charging method with negative pulses
  • Sectional constant-current constant-voltage alternative charging method with negative pulses

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Embodiment Construction

[0035] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] In this embodiment, the storage battery is a Panasonic lead-acid storage battery (LC-X12100), 8 in series, with a voltage of 96V and a capacity of 30AH.

[0037] like figure 1 As shown, the flow chart of the segmental constant current constant voltage alternate charging method with negative pulses according to an embodiment of the present invention, the specific steps are as follows:

[0038] First define the following parameter quantities:

[0039] I max —Maximum charging current 20A, I LP —Negative pulse charge and discharge current 0~20A, V cst —Constant voltage charging voltage 117.6V, V f — Float voltage 108V, V min —Minimum charging voltage 84V, U—battery charging voltage, I—battery charging current, C—battery temperature, T 1 —Constant current and constant voltage alternating charging cycle, T 2 — Negative pulse discha...

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Abstract

The invention relates to a sectional constant-current constant-voltage alternative charging method with negative pulses. The sectional constant-current constant-voltage alternative charging method comprises the following steps: detecting voltage and temperature of a battery, and judging whether the voltage and the temperature satisfy charging conditions or not; judging whether the battery meets quick charging requirements, and if the battery does not meet the quick charging requirements, performing small-current pre-charging on the battery until the battery meets the quick charging conditions; implementing a first constant-current constant-voltage alternative charging stage, and implementing a first stop-charging and negative-pulse charging stage if the voltage of the battery reaches an upper preset voltage limit value; implementing a second constant-current constant-voltage alternative charging stage, and implementing a second stop-charging and negative-pulse charging stage if the voltage of the battery reaches the upper preset voltage limit value again; implementing a third constant-current constant-voltage alternative charging stage until the voltage of the battery reaches the upper preset voltage limit value, and then implementing a third charging-stop stage; and implementing a constant-voltage charging supplementing stage after the quick charging stage is completed. The method disclosed by the invention can be used for improving the charging efficiency, shortening the charging time and prolonging the service life of the battery.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle charging, and relates to a segmental constant current and constant voltage alternate charging method with negative pulses. Background technique [0002] In today's world, the two major problems of environment and energy are becoming increasingly prominent, and electric vehicles have developed rapidly due to their superior environmental protection and energy-saving characteristics. As an important part of the electric vehicle, the on-board digital charger provides an external power supply to charge the vehicle battery. Charging time and battery life have become important criteria for measuring the technical level of electric vehicles. [0003] Large-capacity lead-acid batteries above thousands of amperes have been using the hierarchical constant current charging method for many years, that is, the charging current is reduced step by step. The entire charging process is usually divided into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44
CPCH01M10/446H01M10/448Y02E60/10
Inventor 黄智宇陈波徐正龙杨焘
Owner 重庆工业赋能创新中心有限公司
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