Battery charging circuit and battery charging method

A battery charging and circuit technology, applied in the direction of secondary battery charging/discharging, battery circuit device, circuit device, etc., can solve the problem of inaccurate judgment of the remaining power of lithium battery, etc.

Active Publication Date: 2015-07-29
SHENZHEN JINGQUANHUA ELECTRONICS
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a battery charging circuit, aiming to solve the problem that

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  • Battery charging circuit and battery charging method
  • Battery charging circuit and battery charging method
  • Battery charging circuit and battery charging method

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] The battery charging circuit provided by the present invention is connected to the battery pack, and specifically includes a power conversion module, a control module and an isolation module. The control module is respectively connected to the power conversion module and the battery pack, and the isolation module is respectively connected to the power conversion module and the battery pack. The circuit is combined with the battery charging method, and solves the problem of inaccurate judgment of the remaining power of the lithium battery in the existing lithium battery charging method.

[00...

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Abstract

The invention belongs to the charging technical field and relates to a battery charging circuit and a battery charging method. The battery charging circuit provided by the invention is connected with a battery pack and specifically includes a power source conversion module, a control module and an isolation module, wherein the control module is connected with the power source conversion module and the battery pack respectively, and the isolation module is connected with the power source conversion module and the battery pack respectively; the circuit can be used in combination with the battery charging method, and the control module detects the virtual voltage of the battery pack and controls the power source conversion module to output constant current or constant voltage to the battery pack according to the relationship between the virtual voltage and a mode switching value; since the isolation module is additionally adopted, the circuit can judge residual electricity of the battery pack through detecting the virtual voltage under the situation that peripheral connection of the battery pack is not cut off, and therefore, the circuit has high detection accuracy; and the circuit can be more accurately switched to a constant current charging stage, and therefore, a charging process can be greatly accelerated, and charging time can be saved.

Description

technical field [0001] The invention belongs to the technical field of charging, and in particular relates to a battery charging circuit and a battery charging method. Background technique [0002] Lithium batteries are currently the most widely used rechargeable batteries. In the charging circuit of traditional lithium batteries, the charging protection chip is the core, which is used to control the charging current, charging voltage and judge whether the charging is over. Moreover, in order to prevent the safety problems caused by the overcharging of the lithium battery and prolong the service life of the lithium battery as much as possible, the method of constant current charging first and then constant voltage charging is generally adopted. [0003] However, in the charging process of traditional lithium batteries, the charging time of the constant voltage charging stage is long and the charging efficiency is low. The reason is that the remaining power of the lithium b...

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Application Information

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IPC IPC(8): H02J7/00G01R31/36H01M10/44
CPCY02E60/10
Inventor 谢春华
Owner SHENZHEN JINGQUANHUA ELECTRONICS
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