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Buffer charging circuit of lithium battery

A buffer charging, lithium battery technology, applied in the field of lithium power supply, can solve the problems of large charging current, overheating, shortened lithium battery life, etc., to achieve the effect of increased discharge, improved safety, and easy operation

Inactive Publication Date: 2015-03-25
TIANJIN SHENLU ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, during the undervoltage charging process of the lithium battery, since there is a large voltage difference between the charger and the lithium battery, the charging current is particularly large during the initial charging process, which will shorten the life of the lithium battery. and the occurrence of overheating

Method used

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  • Buffer charging circuit of lithium battery

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Embodiment Construction

[0017] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0018] The core idea of ​​the technical solution is to use the time delay of the RC snubber circuit to switch and charge the lithium battery with large and small currents. When the high-current charging is fully charged, the high-current will cause the ripple of the battery voltage to increase, so that the battery is fully charged, and the charging will stop. This technical solution realizes switching between large and small currents through resistor current limiting and relay exchange, and also supplements electricity with small currents.

[0019] A lithium battery buffer charging circuit, including a charger interface, a battery interface, a charging circuit connected to the charger interface and the battery interface, a buffer timing circuit and a supplementary circuit;

[0020] The charging loop includes a diode D1, a resistor R5, a trans...

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Abstract

The invention provides a buffer charging circuit of a lithium battery. The buffer charging circuit comprises a charger interface, a battery interface, a charging circuit connected with the charger interface and the battery interface, a buffer timing circuit and a supplementary circuit. The charging circuit comprises a low-current charging circuit body formed by connecting a diode and a current limiting resistor in series and a high-current charging circuit body formed by connecting a diode and a normally open contact of a relay in series. The buffer timing circuit is an RC timer, and the normally open contact of the relay in the high-current charging circuit body is controlled to be closed by a triode. The supplementary circuit comprises a battery charging voltage detecting unit and a supplementary unit enabling the triode in the buffer timing circuit to be disconnected. The buffer charging circuit has the advantages that the problem that the lithium battery is charged with high currents instantly when the battery is in an undervoltage and over discharge state is solved, and the problem that when the lithium battery is charged with the high currents, virtual full charging is caused by ripples of charging voltages is solved; the service life of a power source is prolonged, and the number of cycles of charging and discharging is increased.

Description

technical field [0001] The invention belongs to the technical field of lithium power supplies, in particular to a lithium battery buffer charging circuit. Background technique [0002] In the existing technology, during the undervoltage charging process of the lithium battery, since there is a large voltage difference between the charger and the lithium battery, the charging current is particularly large during the initial charging process, which will shorten the life of the lithium battery. and the occurrence of overheating. Contents of the invention [0003] The problem to be solved by the present invention is to provide a lithium battery buffer charging circuit with simple structure, simple operation and high production efficiency. [0004] In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: [0005] A lithium battery buffer charging circuit, including a charger interface, a battery interface,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 郭桂云
Owner TIANJIN SHENLU ENERGY
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