Electric vehicle lithium battery repair tutorial and repair method
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2023/04/28 14:35:14
Electric vehicle lithium battery repair tutorial and repair method. With the continuous improvement of electric vehicles in performance and energy saving and environmental protection requirements, lithium batteries have gradually replaced lead and acid batteries, but batteries can not always be used, even high performance lithium batteries are no exception, after a certain period of use in the power performance and endurance can not meet the demand, only choose to replace scrap.
But a lot of people think, isn't there a technological fix for lithium batteries? Xiaobian can tell you for sure, lithium battery repair is completely can be done. The following Xiaobian will teach you the repair method of electric vehicle lithium battery.
The reason for the decline of lithium battery capacity
1. Cell aging and decay
2. The self-discharge rate is different, which leads to the imbalance of battery quantity in series, and ultimately leads to the reduction of capacity and durability of lithium battery
3. In the process of battery use and charging and discharging, there will be "vulcanization" phenomenon affecting the capacity of lithium batteries
Battery vulcanization performance: the battery itself low electricity, charging for a while on the full, discharge for a while did not
Battery softening performance: battery internal liquid turbidity, black. The battery capacity decreases, and the lead powder falls off after the time is over and long
4. Improper charging during summer and winter festivals. Battery charging voltage and ambient temperature is inversely proportional to the relationship, so the summer temperature is high, battery overcharge causes battery water loss, resulting in battery bulge, deformation. In winter, undercharged driving decreases
Common faults and repair methods of electric vehicle lithium battery
1. Battery water loss failure
Its main performance of battery capacity decline, resulting in thermal runaway and positive plate deformation, battery expansion.
Repair method: pry open the cover plate above the electric vehicle battery; Open the rubber cap to reveal the vent; Observe whether the battery of electric vehicle is dry through the exhaust hole, if so, water. In addition, it is recommended to use medical disposable syringes and secondary distilled water, adding water needs careful operation, not enough to add.
Two, battery imbalance fault
Its main performance is that one or more small batteries have problems in the battery pack, and other good batteries can not be used normally.
Repair method: For battery unbalance fault, users can find the capacity, voltage, self-discharge, battery internal resistance and other consistent batteries together.
Three, battery sulfuric acid failure
Its main performance is the formation of white hard lead sulfate crystal on the plate, and it is very difficult to change into the active substance lead sulfate when charging.
Repair method: Repair instrument can be used to repair, by measuring the state of the battery, in the process of charging and discharging constantly emit positive and negative frequency conversion particle wave, through about 15 hours, can remove the crystallized hard lead sulfate in the battery. It is important to note, however, that this generally only applies to minor sulfation. If the sulphate is severe, the battery needs to be replaced.
Four, battery plate softening failure
Its main performance is that the surface of the positive plate gradually changes from firm at the beginning to soft until it becomes mushy. At this time, the decrease of surface area will lead to the decrease of battery capacity.
Fix: After the battery discharge stops at 10.5V, use the bulb to deeply discharge it for 1 to 5 hours. And then with the activator, activation repair. In this case, there is a certain chance that it can be repaired, but if the situation is serious, it can only be replaced.
5. Battery short circuit fault
Its main performance is the small lead in the short circuit when touching the positive and negative polarity caused by self-discharge, seriously affect the battery life.
Repair method: Remove the lead residue and lead block at the short circuit, and restore it from the newly installed partition paper.
6. Battery open circuit failure
Its main performance is a circuit in a place due to disconnect so that the resistance is too large, the current can not pass normally.
Repair method: Use a multimeter to check the connections inside the battery, find the broken ones, and weld them again.
Now electric vehicle users encounter lithium battery failure problem is to take to repair shops, businesses after sale replacement of new lithium battery, or some electric vehicle repair personnel, some forums, website God in the face of some electric vehicle lithium battery users asked about lithium battery repair problems, is also a said not to repair, can only be replaced.
In fact, in daily life, we should also increase the maintenance of lithium batteries, so that we can maximize the life of the battery. In addition, if you encounter lithium battery failure can not be solved, it is recommended to go to the maintenance point as soon as possible for maintenance, so as not to cause new problems.
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