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Battery charge method

A battery charging and battery technology, applied in the direction of secondary battery charging/discharging, secondary battery repair/maintenance, etc., can solve the problems of reducing battery life, battery material failure, etc., to reduce battery life, improve cycle life, improve The effect of safety performance

Inactive Publication Date: 2016-08-17
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a battery charging method, which is used to solve the problem in the prior art that the battery cell material is prone to irreversible failure and reduces battery life in the process of charging the battery

Method used

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Embodiment 1

[0037] figure 1 A schematic flow chart of the battery charging method provided by the embodiment of the present invention, such as figure 1 As shown, the battery charging method of this embodiment may specifically include the following steps:

[0038] 101. Determine the maximum charging current of the battery and the sensitive voltage of the battery.

[0039] In the embodiment of the present invention, different positive electrode materials and negative electrode materials are used to make battery cells. Due to the different properties of the battery cell materials themselves, the performance of the battery is jointly determined. Therefore, before charging the battery, it is first necessary to confirm the maximum charging current of the battery and the sensitive voltage of the battery.

[0040] In the embodiment of the present invention, the maximum charging current of the battery refers to the maximum current that the positive electrode material in the cell of the battery c...

Embodiment 2

[0061] In this embodiment, three sets of experiments will be used for comparative analysis, and the three sets of experiments will use different methods to charge batteries of the same specification, and three sets of different experimental results will be obtained. Among them, the battery cell uses LiCoO 2 As the cathode material and graphite as the anode material, two batteries were used for each experiment. Specifically, the cathode is made of 96.7% LiCoO 2 +1.7%PVDF+1.6%SP mixed composition, the anode is composed of 98% artificial graphite+1.0%SBR+1.0%CMC, the electrolyte is composed of organic solvent (30%EC+30%PC+40%DEC) and 1mol / L LiPF 6 , and then add additives (0.5% VC, 5% FEC, 4% VEC) composition.

[0062] The first set of experiments:

[0063] Figure 4 It is an example diagram of the relationship between time and current in the battery charging method in the prior art. Such as Figure 4 As shown, the battery is charged using the battery charging method in th...

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Abstract

The invention provides a battery charge method which comprises the following steps of: confirming the largest charge current of a battery, and sensitive voltage of the battery; performing constant-current charge on the battery by using the largest charge current of the battery, when the voltage of the battery reaches the sensitive voltage of the battery, stopping constant-current charge to the battery, and leaving the battery to stand; performing pulse charge on the battery by using first charge current and first discharge current, wherein the first charge current is smaller than the largest charge current; the first discharge current is smaller than the first charge current. By adopting the battery charge method provided by the invention, the phenomenon of partial over-voltage of a cell material of the battery in the battery charge process is avoided, the risk of material failure is reduced, the circulation service life of the battery is remarkably prolonged, and the security property of the battery is improved.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a battery charging method. Background technique [0002] With the development of modern society and the enhancement of people's awareness of environmental protection, more and more new energy sources have been developed and utilized, for example, electric vehicles using electric energy as power, energy storage power stations that store electric energy, etc., and generally require the use of A large-capacity battery serves as a power source for storing electrical energy. [0003] Due to different use scenarios, the requirements for battery capacity are also different. Therefore, in scenarios where large-capacity batteries are required, how to increase the battery capacity of batteries made of the same material has become an urgent problem to be solved. At present, by improving the material The applied voltage is considered to be an effective way to increase the battery capacity....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44
CPCH01M10/44Y02E60/10
Inventor 杨洪梁巍
Owner NINGDE AMPEREX TECH
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