Causes and solutions of over-discharge of lifepo4 battery pack

<p>The charging process is a process of filling a bucket with water, and this process is a length of time. The larger the faucet, the faster it can be filled with water. In the same way, charging the battery depends on the charging current, the larger the current, the shorter the charging time! ! !</p><p><br></p><p>Discharge:</p><p>The discharge process is actually the reverse of the above, a process of letting off the water. Of course, it depends on the power of your power load end. The greater the power, the more power is consumed, and the discharge time will be relatively shorter!</p><p><br></p><p>Overcharge and overdischarge are all operating behaviors that exceed the original capacitance. Overcharge and overdischarge will damage the lifepo4 lithium battery, causing damage to the battery, and it is irreversible. Overcharge will cause lithium dendrites, and overdischarge will cause copper dendrites, which will cause problems such as short circuit and failure of lithium batteries; therefore, lithium batteries require shallow charging and shallow discharge. At present, it is necessary to have a protection circuit as much as possible in the process of using lithium batteries, so as to ensure safety. At the same time, lifepo4 lithium battery&nbsp;is a relatively safe type of lithium batteries.</p><p><br></p><p>The 12-series quad-parallel 26650 power <a href="https://www.ufo-battery.com/lifepo4-battery-pack" rel="noopener noreferrer" target="_blank">lifepo4 battery pack</a>&nbsp;has not been charged for a long time after being discharged, and the voltage is very low. Now the special charger is connected and the green light is displayed. Taking into account that the internal resistance of the discharge is very large after a long time, even if the current can be rushed in, the current is very small, and the green light is normal. When a single lithium iron phosphate is dead, it can be recovered by charging directly with a charger. However, the battery pack has a balanced protection board. Will it fail to charge?</p><p><br></p><p>solution</p><p>The iron-lithium discharge curve is very straight. It is impossible to judge the electric quantity by voltage alone. The equalization can only be balanced by the cell filling up. The discharge after filling up is not balanced, that is, the cell internal resistance and capacity are inconsistent. There is no other way to solve it by changing the content.</p><p><br></p><p>A resistor is connected in series and charged directly from the battery for half an hour, and the protection board is opened. Then charge from the charging port of the protection board, or find a way to charge from the discharge port for half an hour, then you can charge normally</p><p><br></p><p>It needs to be charged from the discharge port. Be careful not to reverse the polarity. If the red light is on, it will do. You can also use another battery pack to charge him, 36/48 will do, resistance 50 ohms 100 ohms 200 ohms will do, charge the battery to more than 30v, it can be charged normally, hands close to the resistance will be hot, not too much heat.</p><p><br></p><p>If it still does not work, you need to consider replacing it. In fact, don't wait until there is a problem with the battery, and then think about a solution. It is important to pay attention to and maintain the battery.</p>