Is a current limiting circuit necessary to charge lithium iron phosphate batteries?

Introduction Is a current limiting circuit necessary to charge lithium iron phosphate batteries? 1. Lithium iron phosphate battery has a protective plate, but it is mainly used in series circuits. Generally, it is only used for 3 series circuits. 2. The protection pla

Is a current limiting circuit necessary to charge lithium iron phosphate batteries?

1. The lithium iron phosphate battery has a protective plate, but it is mainly used in series circuits. Generally, it is only used for 3 sets of skid plates. 2. The load must not depend on the action of the protection plate. . Generally, the protection plate is too discharged. The charging adjustment range exceeds the normal use range of the battery. The function of the protective plate is only to prevent explosion. Lithium iron phosphate requires a special charger, but usually a better lithium battery. Chargers will have a transfer switch for lithium iron phosphate4. The constant voltage power supply made by LM317 is definitely not suitable for charging. The lithium battery is charged at a constant current stage, the direct charging voltage of 3.2V is too high and may exceed the battery. charging current. 5. The voltage of cCharging cut-off of lithium iron phosphate is 3.6V, 3.2V is the rated voltage, and 2.5V is the rated discharge cut-off voltage. The safety of lithium iron phosphate batteries is better than that of ordinary lithium iron phosphate batteries. Ion batteries. Overcharge and overdischarge generally do not explode. Therefore, there are few single-cell batteries with protective plates. You should not use a constant voltage to directly apply 3.6V to the lithium battery at the start of charging. the lithium battery is small. If you charge the voltage of 3.6V directly, it is almost disconnected from the power supply. The voltage across 317 will definitely drop, resulting in a voltage of 3.6V. The power capacity needs to be increased and lithium batteries cannot support it. You will find out by playing with a lithium battery charger. During a cconstant current load, the difference between the supply voltage and the actual battery voltage is usually very small. 0.5 V.

Yes. However, the charger must use a 1000 mAh lithium battery charger. Generally, the charging current is 500mA. If it is less than 1A, the charging time will be several times longer, about 8-14 hours. protection panel. The 7200 mAh lithium battery generally has a charging current of 3A and a charging time of 3-4 hours. The battery's ability to supply current must also be much lower, otherwise high current will burn out the protection board. Indeed, the protection card cannot transmit a significant supply current nor a significant load current.

As for the function of the protection panel, it is always the same. It will not overcharge or overdischarge. If the charging voltage exceeds the pr voltageprotection, it will automatically stop charging to avoid overcharging when discharging. the voltage is lower than the protection voltage, it will also automatically cut off the discharge to prevent over-discharge and play a protection role.

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