Ni-mh/ni-cd three-step pulse charging control technology research

Source: 2020 - 04 - Based on ni - 11: why do click traffic time mh / ni - CD three-level pulse charging control technology research [ Abstract] For nickel metal hydride and nickel pickaxe charging control method properly, charging problem such as low efficiency, current time, puts forward a three-level pulse charging control mode of the charger. Three-level pulse charging control method is to advance battery charging. Then the constant current charging, the last is a trickle charge. Finally, the experimental results show that the three phase pulse charging battery charging efficiency is improved greatly. Charging mode; Three-level pulse charging; Charging efficiency with the development of space technology, people more and more high to the requirement of power supply. Sealed nickel metal hydride compound bede battery with high efficiency, long cycle life, large energy density, small volume, light weight, compact structure, no maintenance, etc. Nickel metal hydride batteries are pickled cucumber have performance of overcharge, over discharge, and there is no pickles problems caused by the pollution of heavy metals, therefore they are widely used in industrial and consumer products. Nickel metal hydride batteries are normally used for handheld devices. However, due to the charging ways is not correct, the service life of the rechargeable battery is much lower than the service life of rules. That is to say, a lot of battery charge is not in bad but not good, you can see the quality of the charger has a great influence to the battery life-span. At present commonly used method is the constant voltage constant current charger, but its efficiency is low, easy to cause the battery temperature rise rapidly, reduce battery life. Based on this, puts forward a three-stage pulse charging control of intelligent controller scheme, three sections of the pulse charging and charging by constant current charging and trickle charge. This scheme design of charging way can take advantage of the large current automatic control and protection of nimh battery and nickel picks shape of the battery charging current process, can greatly improve the efficiency of battery charging, shorten the charging time of battery and extend the life of the battery charge. Summary of test results: the first set of tests is to 1000 ma current more than 1 c 70 mah/AA battery charge and discharge test. The results show that the battery temperature can be keep in a safe range, battery charging and discharging efficiency can reach above 90%. The second test is the use of 2300 ma/h, AA batteries to test the efficiency of charging and discharging of anch tank, the charging and discharging efficiency is close to 100%. Five, the conclusion this paper proposes a detection algorithm based on constant current charging zero/negative voltage of nickel metal hydride batteries and nickel-metal hydride batteries three-level pulse control charging scheme, can effectively improve the charging efficiency of the battery, shorten the charging time, reduce the battery temperature.