Charging method and device

A charging method and charging stage technology, applied in the direction of secondary battery charging/discharging, circuits, electrical components, etc., can solve problems such as battery safety hazards, battery polarization accumulation, etc., to prolong cycle life, increase charging speed, reduce The effect of destruction

Inactive Publication Date: 2017-05-10
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the embodiment of the present invention provides a charging method and device to solve the problem that the existing charging method will cause the accumulation of battery polarization, and as the charging speed increases, the battery has a greater potential safety hazard

Method used

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Embodiment 1

[0049] An embodiment of the present invention provides a charging method, which includes: charging a battery.

[0050] Charging includes a first charging stage and a second charging stage;

[0051] The first charging stage includes at least two charging sub-stages, and in each charging sub-stage, the battery is sequentially charged with a first constant current and a second constant current;

[0052] In the second charging stage, the battery is charged at a constant voltage until the current of the battery reaches the cut-off current, and the constant voltage charging is stopped.

[0053] It should be noted that, in the embodiment of the present invention, when charging the battery, the battery is charged in the first charging stage, until the voltage of the battery reaches the cut-off voltage, the charging of the battery in the first charging stage is stopped.

[0054] In the second charging stage, the battery is charged until the current of the battery reaches the cut-off c...

Embodiment 2

[0072] Based on the charging method provided in the first embodiment above, the embodiment of the present invention provides several specific implementations of the above charging method. Below, with figure 1 The charging process shown is taken as an example for specific description.

[0073] Specifically, the battery used in the embodiment of the present invention is made of a cathode, an anode, a diaphragm, an electrolyte, and a packaging shell through assembly, formation, and aging processes. Among them, the cathode of the battery is composed of 96.7% LiCoO2 (as the cathode active material), 1.7% PVDF (as the binder) and 1.6% SP (as the conductive agent), and the anode is composed of 98% artificial graphite (as the anode active material), 1.0% SBR (as a binder) and 1.0% CMC (as a thickener) are mixed, the separator is a PE film, and the electrolyte is composed of (30% EC+30% PC+40% DEC) (as an organic solvent), 1mol / L LiPF6 and (0.5% VC, 5% FEC, 4% VEC) (as additives). ...

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Abstract

The embodiment of the invention provides a charging method and device. For one thing, the charging process comprises a first charging stage and a second charging stage when a battery is charged in the embodiment; the first charging stage comprises at least two charging sub-stages; the battery is successively subjected to first constant current charging and second constant current charging in each charging sub-stage; and then the battery is subjected to constant voltage charging until the current of the battery reaches to a stop current in the second charging stage. Therefore, the technical scheme provided by the embodiment can solve the problems that the existing charging mode may result in accumulation of battery polarization and the battery has relatively big potential safety hazards along with the improvement of the charging speed.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of batteries, in particular to a charging method and device. [0003] 【Background technique】 [0004] With the continuous improvement of modern technology, people rely more and more on electronic products. As the energy supply of mobile electronic products, batteries are also paid more and more attention. People have put forward various requirements such as longer battery life, faster charging speed and safer for existing batteries. However, judging from the current battery system, the improvement of energy density is temporarily in the bottleneck period, and it is difficult to achieve a substantial increase in a short period of time. Then it is necessary to start from the charging speed and increase the charging speed of the battery, so that the mobile electronic products can obtain energy replenishment in a shorter time. In the prior art, the most common charging method for charging the battery i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44
CPCH01M10/44H01M10/446Y02E60/10
Inventor 张浩方占召郑强党琦
Owner NINGDE AMPEREX TECH
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