Vehicle-mounted lithium battery charger and charging control method thereof

A charge control method and a charger technology, which are applied to battery circuit devices, current collectors, and energy-saving charging equipment, etc., can solve the problems of affecting the service life of the battery, not being able to track the best charging curve well, and slow charging speed, etc.

Inactive Publication Date: 2010-07-21
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the above charger is that the charging speed is slow, and because the charging current is a fixed value during the constant current charging process, it cannot track the best charging curve well, which will affect the service life of the battery

Method used

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  • Vehicle-mounted lithium battery charger and charging control method thereof
  • Vehicle-mounted lithium battery charger and charging control method thereof
  • Vehicle-mounted lithium battery charger and charging control method thereof

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Embodiment 1

[0020] Such as figure 1 As shown, the vehicle-mounted lithium battery charger of the present invention includes a filter module, a power factor correction module, a DC-DC power conversion module, a control module, an auxiliary power supply, an output protection module, a temperature detection module, a cooling fan and a display module; The filter module is connected to the mains, and the output terminals of the filter module are respectively connected to the input terminals of the power factor correction module and the auxiliary power supply. The auxiliary power supply supplies power for the control module and the cooling fan. The power factor correction module, DC-DC power conversion The module and the output protection module are connected in series in sequence, and the output protection module is connected to the battery pack; the control module is respectively connected to the cooling fan, power factor correction module, output protection module, temperature detection modul...

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Abstract

The invention proposes a vehicle-mounted lithium battery charger and a charging control method thereof, which can better control charging process, enables charging current and voltage to approach the optimal battery charging curve to the maximum degree and lengthens service life of the battery. The optimal charging curve of one or more than one battery pack is preset in a control module of the charger, the control module selects the corresponding optimal charging curve according to concrete batter pack information and controls output voltage and output current of a DC-DC power conversion module according to the optimal charging curve and the voltage of the rechargeable battery, the optimal charging curve is the curve for describing the optimal relation of the charging voltage and charging current of the battery pack. When voltage U of the rechargeable battery pack is less than the preset value U1, trickle charge is carried out; when U is between U1 and U2, the control module controls the output current of the DC-DC power conversion module according to the charging voltage and charging current of the rechargeable battery pack; and when U is more than the preset value U2, constant-voltage charge is charged.

Description

technical field [0001] The invention belongs to the technical field of automotive electronics, and in particular relates to a charger for a vehicle-mounted lithium battery and a charging control method thereof. Background technique [0002] The current car charger generally includes a detection unit, a comparison unit, and a charging unit as disclosed in the patent "Battery Pack Charging Device (Application No.: CN200720171927.7)", and the comparison unit sets the first voltage value and the second voltage Value, when the detection voltage value is less than the first voltage value, trickle charging is performed, when the detection voltage value is greater than or equal to the first voltage value and less than the second voltage value, constant current charging is performed, when the detection voltage value is greater than or equal to the second voltage value Perform trickle charging. [0003] The disadvantage of the above-mentioned charger is that the charging speed is slo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02
CPCH02J7/0073Y02E70/40H02J7/0071
Inventor 龚立秋朱得亚王建辉殷玉亮
Owner CHERY AUTOMOBILE CO LTD
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