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Lithium battery pack charge capacity equilibrium control method and protective device thereof

A technology of balanced control and lithium battery packs, which is applied to battery circuit devices, circuit devices, collectors, etc., and can solve problems such as long charging time

Inactive Publication Date: 2009-12-09
BEIJING HUADA ZHIBAO ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because during the equalization period, each battery cell stops charging, this charging protection method is one of the reasons why the charging time of the current lithium battery pack is too long

Method used

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  • Lithium battery pack charge capacity equilibrium control method and protective device thereof
  • Lithium battery pack charge capacity equilibrium control method and protective device thereof
  • Lithium battery pack charge capacity equilibrium control method and protective device thereof

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Embodiment Construction

[0014] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0015] figure 2 It is a schematic diagram of the method for setting the balanced starting voltage of the present invention. As shown in the figure, the present invention changes the setting of the balanced starting voltage in the prior art. In the solution of the present invention, the charging protection and the setting of the balanced starting voltage involve 4 voltage points : 4.3V overcharge protection, 4.2V equalization start, 4.15V overcharge recovery and 4.1V equalization stop.

[0016] Compared with the prior art, this solution adds two sampling points, and the equalization process operates in the range of equalization start and equalization stop, so a longer equalization time and a shorter charging time are obtained. The longer equalization time means that the traditional protection starts equalization when the charger is cut off....

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Abstract

The invention provides a lithium battery pack charge capacity equilibrium control method, which is characterized in that in the charging process, two sampling points are added in the charge equilibrium interval which is between the overcharging protection voltage and equilibrium recovery voltage; the two sampling points are respectively equilibrium starting voltage and overcharging recovery voltage; the equilibrium process acts in both the equilibrium starting and the equilibrium stopping intervals; in the equilibrium stage, a charger charges the battery pack continuously. The method is realized by a charging equilibrium circuit; as the battery protection IC in the invention is adopted, the charging process can equilibrate longer time, thus not only the equilibrium energy is improved for at least two times, but also the charging time is shortened.

Description

technical field [0001] The invention relates to a battery protection method and a battery protection device, in particular to a charging protection method for a series lithium battery and a charging protection device thereof. Background technique [0002] Now portable products such as notebooks and electric tools are more and more widely used, and the battery voltage used is also getting higher and higher. In order to meet its requirements, it is necessary to connect multiple lithium battery cells in series to meet the requirements. In this case, the voltage detection, management and protection of multi-cell batteries are becoming increasingly important. At present, a variety of protection ICs have been developed for this point. The voltage of each battery cell in the battery pack is tested by the voltage detection circuit in the IC. The programming device sends a signal to control the action of the switch circuit, shuts down the charging circuit, and completes the voltage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/06H02J7/00
Inventor 陈斌斌符力建邓晓祺
Owner BEIJING HUADA ZHIBAO ELECTRONICS SYST
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