Lithium battery protection board self-adaptive to charging voltage and lithium battery charging method

A lithium battery protection board and charging voltage technology, which is applied in the direction of secondary battery charging/discharging, battery disconnection circuit, battery circuit device, etc., can solve the problem of insufficient charging of the battery pack, high voltage accuracy requirements of the charger, and insufficient charging of the battery, etc. problem, to achieve the effect of improving efficiency, reducing charging risk, and reducing defective rate

Pending Publication Date: 2018-02-27
SUZHOU HUAZHIJIE TELECOM +1
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AI Technical Summary

Problems solved by technology

[0002] Lithium battery charging control method: first constant current, then constant voltage when the battery is nearly full, constant voltage charging is a small current trickle charging method, which is a necessary condition for the battery to be fully charged, when the output voltage of the charger is too low, the battery The battery pack cannot be

Method used

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  • Lithium battery protection board self-adaptive to charging voltage and lithium battery charging method
  • Lithium battery protection board self-adaptive to charging voltage and lithium battery charging method
  • Lithium battery protection board self-adaptive to charging voltage and lithium battery charging method

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Embodiment Construction

[0025] combine figure 1 , which describes the first specific embodiment of the present invention in detail, but does not limit the claims of the present invention in any way.

[0026] like figure 1 As shown, a lithium battery protection board with an adaptive charging voltage includes a fuse, a program management MCU chip U2, a special chip U3 for charging and discharging, a resistor for current detection, a discharge switch, a charging switch and a trickle charging circuit. The current charging circuit is used to simulate constant voltage trickle charging in the later stage of lithium battery charging to make the lithium battery fully charged. The special charge and discharge chip U3 is used to detect the voltage, current and temperature of the lithium battery, and send the voltage, current and temperature data to Program management MCU chip U2, said program management MCU chip U2 performs charging, discharging, pre-charging and other various controls according to the obtain...

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PUM

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Abstract

The invention relates to a lithium battery protection board self-adaptive to charging voltage and a lithium battery charging method. The lithium battery protection board includes a fuse, a program management MCU chip U2, a charging and discharging dedicated chip U3, a resistor for current detection, a discharge switch, a charging switch and a trickle charging circuit, wherein the trickle chargingcircuit is used for simulating a constant voltage trickle charge during the charging of lithium batteries so that the lithium batteries can be fully charged. In the lithium battery charging method, when battery voltage reaches a set value, the charging switch is turned off, an analog trickle charge state is entered, a trickle charge current passes through PACK+, the fuse, each battery, the resistor for current detection, the trickle charge circuit and PACK- to charge the batteries; when the battery voltage is detected to reach full voltage, the batteries are fully charged and the trickle charging circuit is turned off. The lithium battery protection board and the lithium battery charging method can adapt to various charging voltages; this circuit automatically simulates constant voltage trickle charging during post-charging period, is independent of charging voltage and can also ensure that the batteries are fully charged.

Description

technical field [0001] The invention relates to the field of lithium battery charging, in particular to an adaptive charging voltage lithium battery protection board and a lithium battery charging method. Background technique [0002] Lithium battery charging control method: constant current first, then constant voltage when the battery is nearly full, constant voltage charging is a small current trickle charging method, which is a necessary condition for the battery to be fully charged, when the output voltage of the charger is too low, the battery The battery pack cannot be charged to the required voltage point. When the output voltage of the charger is too high, the battery pack protection board will be over-voltage protected. There is no constant voltage charging stage. The above two methods will cause the battery to not be fully charged, so the voltage of the charger High precision requirements, generally in the mv level. [0003] The charging voltage accuracy control ...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02H7/18H01M10/44
CPCH02J7/0077H02J7/0091H01M10/44H01M10/443H02H7/18H02J7/0031Y02E60/10
Inventor 何小雄
Owner SUZHOU HUAZHIJIE TELECOM
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