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Charging method and device

A charging method and constant current charging technology, applied in secondary battery charging/discharging, circuits, electrical components, etc., can solve the problems of battery safety risks and other issues

Inactive Publication Date: 2017-05-31
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 increasing the charging speed in the existing charging method will lead to a greater safety risk of the battery

Method used

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Embodiment 1

[0050] In order to solve the above-mentioned problems in the prior art, an embodiment of the present invention provides a charging method, which includes: charging a battery.

[0051] Charging includes a first charging stage and a second charging stage;

[0052] 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, a second constant current charge, a constant current discharge and a third constant current charge;

[0053] In the second charging phase, the battery is charged at a constant voltage.

[0054] It should be noted that, in the embodiment of the present invention, when charging the battery, the charging method of the first charging stage is used until the cut-off voltage of the battery is reached, and then the charging method of the second charging stage is used to charge the battery; In the second charging stage of charging, the battery is charged at a co...

Embodiment 2

[0083] 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.

[0084] 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) + 1.6% SP (as the conductive agent), and the anode of the battery is composed of 98% artificial graphite (as the anode active material ) + 1.0% SBR (as a binder) + 1.0% CMC (as a thickener), the separator is a PP / PE / PP composite film, and the electrolyte is an organic solvent (30% EC + 30% PC + 40% DEC) and 1mol / L LiPF6, then add additives (0.5% VC, 5% FEC, ...

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Abstract

The embodiment of the invention provides a charging method and device. The charging method is characterized in that the charging for a battery includes a first charging stage and a second charging state, wherein the first charging state comprises at least two charging sub-steps; the battery is sequentially subjected to first constant-current charging, second constant-current charging, constant-current discharging and third constant-current discharging in each charging sub-step; the battery is subjected to constant-voltage charging in the second charging state. According to the technical scheme provided by the embodiment of the invention, the charging method and device can solve the problem of high safety risk, caused by the increase of the charging speed, of the battery in an existing charging method, can be solved.

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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IPC IPC(8): H01M10/44
CPCH01M10/44H01M10/448Y02E60/10
Inventor 郑强方占召党琦陶强张浩
Owner NINGDE AMPEREX TECH
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