To charge lithium batteries do not have to use lithium battery management chip, with regulated power supply and so on is also possible, for alternative circuits can use their own 555 and so on chip with hole plate or copper clad plate circuit, for lithium batteries battery management chip for battery charging and discharging of various performance such as, constant voltage, constant current, etc., these charging methods are good for the battery, The most important thing is that it is relatively safe.
For example, Texas Instruments has the production of battery chips (voltmeter), which is important to detect the capacity of the battery and various indicators, and strictly control the charge and discharge, many of these types of lithium battery management chips are equipped with thermistors to detect the temperature of the battery, if it exceeds the specified value, it will alarm, and cut off the circuit.
In addition, the lithium battery management chip has an obvious effect on the continuation of the life of the battery, because with the charge and discharge chip, the voltage and current have reached a controllable state, and the charging state of each stage of charging can be effectively controlled.