It is well known that the lifepo4 battery 12v 200ah has the protection of the lithium battery protection board. The quality of a battery depends not only on the quality of the battery core, but also the effect of the protection board on the battery is also big. Inferior protective boards not only protect the battery, but may also be the culprit in manufacturing accidents. Therefore, we must master the basic methods of detecting the protection board and the battery core.
Common causes of poor lifepo4 battery 12v 200ah protection boards are:
Put the charging line on the lifepo4 battery 12v 200ah to see the reading of the charging current. Normally between 50mA and 600mA. If the current is below 50mA, use the tweezers to clamp the B- of the battery and the p-pole of the battery protection board for a few seconds, see if the ammeter index rises, and the reading keep between 100mA and 600mA when loose. If this happens then It can be determined that lifepo4 battery 12v 200ah core is dead, as long as it is charged.
If the ammeter indicates that it is above 600 mA or exceeds 1 A, it can be judged that the lifepo4 battery 12v 200ah is defective. When determining whether the lifepo4 battery 12v 200ah is fully charged, you can discharge it for a while or use the meter to measure the lifepo4 battery 12v 200ah level above 4.1V. Generally, the machine without discharge current is defective in the protection board.
In the state of charge, the voltage is between 3.0V and 4.1V, and the current is normal at 50mA to 600mA, but it should be noted that the positive and negative poles cannot be reversed. In the discharge state, the voltage across the protective plate is 3.2 V or more, and the current is 200 mA or more. In the discharge state, the voltage of the protective plate is not between 2.0V and 3.2V, and the current is normal at 100mA or more.
In the discharge state, if the lifepo4 battery 12v 200ah voltage is above 3.7V, there is no voltage and current in the instant and the protection board is defective. The switch on the test stand is to test the "charge" and test the "discharge" function.
The above is the basic lifepo4 battery 12v 200ah protection board and battery detection method, which can be used to check whether the protection board is defective. protection board?
