How to change the output voltage of a lithium battery from 24V to 5V

Introduction The easiest way to change the output voltage of a lithium battery from 24V to 5V is to use a resistor to divide the voltage. If the required voltage is higher, increase the voltage divider output appropriately, then use a resistor to divide the voltage. t

How to change the output voltage of a lithium battery from 24V to 5V

The simplest way is to use resistors to divide the voltage. If the voltage requirements are higher, increase the voltage divider output appropriately, then add a three-terminal voltage regulator to the voltage divider output. This method causes a large loss of electrical energy, and the utilization rate of electrical energy is only 20%. Can be used for short-term emergencies. A better way is to use modulation and demodulation, that is, convert the DC voltage of 24 volts into a pulse voltage with a broadening ratio of about 0.2 and a maximum value of 24 volts, then transforming it into a direct voltage of 5 volts. In this way, the energy utilization rate can be significantly improved.

Not constant When the lithium iron phosphate battery is fully charged, the charger will stop charging et the battery will drop to just 3.4V in over 10 minutes. .

About the problem that the fully charged voltage of the 24V lithium iron phosphate battery is not constant:

Under normal circumstances, the disconnection voltage of all Batteries will drop after being fully charged, and the voltage of the battery after falling is called "open circuit voltage", and the voltage when fully charged is called "charging limit voltage". The working platform of the lithium iron phosphate battery is 3.2 V. This voltage is also called "nominal". voltage".

As long as the battery voltage doesn't drop too much after being fully charged, it's normal. If it drops too quickly, there's likely a problem with the quality of the battery, such as high internal resistance and significant self-discharge

Others There is another reason for the decline.n of the battery, namely the charger problem. Under normal circumstances, the lithium battery charger is constant current charging - constant voltage charging will stop when the current drops beyond. ten or tens of mA. If charging is not done correctly, the problems you mentioned will also occur.

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