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Rapid lithium battery charging method for DC brushless motor driving system

A brushless DC motor and drive system technology, which is applied in the charging/discharging of secondary batteries, lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems of destroying the internal structure of lithium batteries, affecting the service life of lithium batteries, and generating large amounts of heat from batteries. , to achieve the effect of speeding up the charging process, shortening the waiting time, and broad market prospects

Active Publication Date: 2015-03-25
CHANGZHOU GLOBE
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AI Technical Summary

Problems solved by technology

[0003] The power supply module is the core of DC brushless motor drive systems such as power tools and garden outdoor tools. The existing DC brushless motor drive systems mostly use lithium batteries for power supply. In the initial stage, the current is large and the charging is fast, but when the charging capacity is close to full, the voltage of the lithium battery is high, that is, the remaining capacity is high, the proportion of holes in the internal storage charge is small, and the battery is still charged with a large current, and the battery will heat up rapidly and will destroy the lithium battery. The internal structure of the battery, the charging time is long, the battery generates a lot of heat during charging, and the service life of the lithium battery is affected.

Method used

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  • Rapid lithium battery charging method for DC brushless motor driving system

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] Embodiments of the invention include:

[0020] A lithium battery fast charging method for a DC brushless motor drive system, comprising the following steps:

[0021] (1) Constant power charging stage: this stage is recorded as CP, the charging power P is set during charging, the charging current I = P / V is calculated according to the detected lithium battery voltage V, and the charging current I is closed-loop controlled. , the charging current decreases with the voltage, and the power remains unchanged. When...

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Abstract

The invention discloses a rapid lithium battery charging method for a DC brushless motor driving system. The rapid lithium battery charging method comprises the following steps: (1) constant-power charging stage; and (2) linear charging stage. By adopting the mode, the rapid lithium battery charging method for the DC brushless motor driving system has the advantages that the charging process is accelerated, and the heat dissipation in the charging process is reduced, so that the charging can be carried out in relatively short time, and further the waiting time of equipment is shortened when a battery is charged and the like, and the scheme has a wide market prospect on the popularization of the rapid lithium battery charging method for the DC brushless motor driving system.

Description

technical field [0001] The invention relates to the field of battery charging, in particular to a fast charging method for a lithium battery used in a DC brushless motor drive system. Background technique [0002] For the field of electric tools and garden tools powered by lithium battery packs, due to the limited capacity of the battery, for the working environment that needs to be used for a long time, the charging time of lithium batteries is the key to determine whether the electric equipment can continue to be used faster. [0003] The power supply module is the core of DC brushless motor drive systems such as power tools and garden outdoor tools. The existing DC brushless motor drive systems mostly use lithium batteries for power supply. In the initial stage, the current is large and the charging is fast, but when the charge is close to full, the voltage of the lithium battery is high, that is, the remaining capacity is high, the proportion of holes in the internal sto...

Claims

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Application Information

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IPC IPC(8): H01M10/44
CPCH01M10/44H01M10/052Y02E60/10H01M10/02H01M2010/4271
Inventor 王德洪廖辉彭立军
Owner CHANGZHOU GLOBE
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