Quick charging device and method for nickel-hydrogen battery

Abstract

The invention discloses a quickly charging device and a method of nickel-hydrogen battery. The device comprises a switch circuit, an adapter, a thermistancce clinging to the surface of the battery, a switch control circuit which is arranged in a micro-processor and connected with the connected digital analog conversion module and the switch circuit. When in charging, the voltage value of the battery is compared with the preset voltage boundary value; if the voltage of the battery is smaller than the voltage boundary value, the switch circuit is controlled to switch to constant voltage mode for quickly charging up the battery; if not, the switch circuit is controlled to switch impulse mode to conduct supplementary charging. When in quick charging, the battery temperature is compared with the preset temperature boundary value; if the battery temperature is higher than the preset temperature boundary value, supplementary charging is conducted; if the battery temperature is lower than the temperature boundary value, quick charging is conducted. The invention overcomes the occurrence of debounce voltage in measuring voltage at low cost, enhances the precision of the measure voltage value of the battery, and improves the control sensitivity.

Description

technical field [0001] The invention relates to the technical field of battery charging, in particular to a fast charging device and method for nickel-metal hydride batteries. Background technique [0002] With the popularization of electronic products, especially the wide application of electronic products equipped with nickel metal hydride batteries, the battery life of nickel metal hydride batteries has become one of the main indicators to measure the characteristics of an electronic product. And this indicator is not only related to battery capacity, but also involves the selection of charging method. Among them, the battery capacity is an internal cause and cannot be changed; while the charging method is an external cause, the best charging method can be selected according to different environments, so as to obtain the maximum battery life for electronic products. [0003] Commonly used charging methods are mainly divided into three types: pre-charging, fast charging a...

AI Technical Summary

Problems solved by technology

The disadvantage of this control method is: the maximum voltage Vmax of fully charged battery will change with the ambient temperature and charging rate, and the maximum charging voltage of each single battery in the battery pack is also different, so it is impossible to use this method to accurately Judging that the battery is fully charged

[0016] Most of the fast charging stage uses constant current charging, which inevitably increases the complexity of related peripheral circuit design, thereby increasing the cost of the charging module, and to a certain extent affects the popularity of related products

[0017] "Frequent power outages" means that in order to ensure the normal operation of the product, the charging module must be required to complete the charging process within a limited time, and the charging method using voltage control, in order to prevent the voltage from bouncing when measuring the voltage, pulse charging is used as the fast charging stage. The charging method will prolong the charging time, which does not meet the specific requirements of this specific environment.

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