48 Fu Xingheng lithium battery cannot be charged with other chargers due to the following situations:
1. Lithium battery is caused by a problem with the Lithium battery protection board. If it cannot be charged, it is determined that it is a problem with the lithium battery protection board. There are two relatively simple methods.
The first method is. to charge the lithium battery directly without passing through the protection board, that is, B+ and B- of the lithium battery are charged directly if it can be charged, this can ensure that the lithium battery lithium is normal without going through. The protection plate, but it cannot be charged after passing through the protection plate. This shows that the lithium battery. The protection card is defective.
Method 2, replace the protection plate. If the new plprotection plate is replaced, it can be charged, but the old protection plate cannot be charged, which means the previous lithium battery protection plate is defective.
If it is a problem with the lithium battery protection board, most of the time it is because the charging MOS of the protection board is defective, or the charging fuse is broken by large current, or the integrated circuit of the lithium battery protection board is damaged.
2. Problems with the lithium battery PACK process prevent the lithium battery from charging.
This reason includes the lithium battery PACK internal process and charging circuit. The PACK process includes virtual soldering during soldering, rusting and disconnection of nickel strips in series, short circuits in the assembly circuit, etc. The method for determining the probThe elements of the PACK process is to disassemble the lithium battery, carry out visual inspection of each point in the process, and carry out charging test after carrying out basic observations such as false welding and false welding, so that you can quickly determine if the PACK process is There is a problem.
Charging circuit process problems include faults in the plug, faults in the plug welding wire, etc. For example, the DC head is the charging port of most small power lithium battery products if direct current. The head is defective or DC welding at the plug welding position will cause problems with the lithium battery charging circuit, and the lithium battery will not be able to charge.
Solution: Re-weld the false weld position. If it is a problem with the charging port, replace the charging port and resolder.
3. The lithium battery cell problem is preventing the lithium battery from charging.
If so, is a cell problem causing the lithium battery to charge. There are two ways to determine whether it is charging or not.
The first is to charge each cell string of the lithium battery if it is found that a battery is charging . The cell string cannot be charged, it means the lithium battery is discharged, the core is defective, and the problem is determined to be the lithium battery cell!
The other is that the batteries in each string can be charged, but the voltage difference between each string is relatively large. We also say that the constant voltage difference of the lithium battery is large, which will also be the case. prevent the lithium battery from charging. If the voltage difference between the battery strings at the lithium is important, it can also be determined that there is a problem with the lithium battery cells that is preventing the lithium battery from charging.
For example: a 36V ternary lithium battery, a combination of 10 strings, if the voltage of one string of cells is 4.2V and the voltage of other strings is about 3 .0V. When the charger charges the lithium battery, although the other stringsThey are all about 3.0V, which is a very low voltage, but a 4.2V string will instantly reach the protection value against overload of the lithium battery protection board when charging, and the protection board will activate the overcharge protection and disconnect the charging MOS tube. causing the battery to charge. No power is coming.
Solution: Battery cell problem. If the battery cell cannot be charged, the battery cell must be replacedplaced. If the battery cell voltage difference is large, the voltage of each cell string of the lithium battery. can be equalized. Press and continue charging.