Electric vehicle lithium battery maintenance tutorial and repair method
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2022/11/18 14:52:50
Electric vehicle lithium battery maintenance tutorial and repair method. With the continuous improvement of the requirements of electric vehicles in performance and energy saving and environmental protection, 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 are wondering, isn't it possible that the lithium-ion battery could be technically repaired? Xiaobian can definitely tell you that lithium battery repair can be done. The following Xiaobian will teach you the repair method of electric vehicle lithium battery.
The reason of lithium battery capacity decline
1. Aging and decay of the cell
2. Different self-discharge rates lead to the imbalance of battery quantity in series, which 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 too long
4. Improper charging during summer and winter festivals. Battery charging voltage and the 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. Winter undercharges show a drop in mileage
Common faults and repair methods of electric vehicle lithium battery
1. Battery water loss failure
Its main performance of battery capacity decline, which leads to 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 expose 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 in the battery pack have problems, and other good batteries can not be used normally.
Repair method: For battery imbalance fault, the user can find the capacity, voltage, self-discharge, battery internal resistance and other consistent batteries to use together.
Three, battery sulphate failure
Its main performance is the formation of white hard lead sulfate crystal on the plate, but 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 should be noted, however, that this generally applies only to minor sulphation. And if the sulphate is more serious, you need to replace the battery.
Four, battery plate softening fault
Its main performance is that the surface of the positive plate gradually changes from solid 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 has been discharged to 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 to touch the positive and negative polarity of the self discharge, seriously affect the battery life.
Repair method: Remove the lead residue at the short circuit, and restore it from the newly installed baffle paper.
6. Battery open circuit failure
Its main performance is that a certain part of the circuit is disconnected so that the resistance is too large, the current can not pass through normally.
Repair method: Use a multimeter to check the connections inside the battery, find the broken ones, and then weld them again.
Now electric vehicle users encounter lithium battery failure problem is to take to the repair shop, business after-sales replacement of the new lithium, 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, but also said that it can not be repaired, 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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