Electric cars are now a common sight on roads around the world, Electric vehicle(EV) marketing have skyrocketed in the past few years, Ev remain an unfamiliar experience for many drivers, People share understandable doubts and concerns about many aspects of Evs, but especially the battery.
Electric vehicle batteries are divided into two categories: batteries and fuel cells. Batteries are suitable for pure electric vehicles, including lead-acid batteries, nickel hydrogen batteries, sodium sulfur batteries, secondary lithium batteries, air batteries, and ternary lithium batteries.
What are the common faults of electric vehicles in terms of batteries? Any solutions? Here we will give more specific explanation as following:
1, Battery water loss fault
Its critical behavior is decrease in battery capacity, which in turn leads to thermal runaway and deformation of the positive electrode plate, and expansion of the battery's shape.
Repair method: Pry open the cover plate on the electric vehicle battery; Open the rubber cap to expose the exhaust hole; Observe whether the electric vehicle battery is dry through the exhaust hole, and replenish water if necessary. In addition, it is proposed to use disposable medical syringes and secondary distilled water, and caution should be exercised when adding water. If it is not enough, add more.
2, Battery imbalance fault
The critical behavior is the presence of one or more problematic small batteries in the battery pack, resulting in other good batteries not being able to function properly.
Repair method: For the unbalanced battery fault, the user can find out the battery with the same capacity, voltage, self-discharge, battery internal resistance, etc.
3, Battery sulfation failure
Its crucial behavior is the formation of white hard lead sulfate crystals on the electrode plate, which are difficult to convert into active substances during charging.
Repair method: A repair instrument can be used for repair. By measuring the battery status, positive and negative variable frequency particle waves are continuously emitted during the charging and discharging process. After about 15 hours, the crystallized and hardened lead sulfate in the battery can be removed. However, it should be noted that this generally only applies to mild sulfation. If the sulfation is severe, it is necessary to replace the battery with a new one
4, Battery plate softening fault
The critical behavior is that the surface of the positive electrode plate gradually becomes soft and loose from its initial solidity until it becomes a paste. At this time, the decrease in surface area will lead to a decrease in battery capacity.
Repair method: After discharging the battery to 10.5V, use a light bulb to deeply discharge for 1 to 5 hours. Then use an activator to activate and repair. In this case, there is a certain probability that it can be repaired, but in severe cases, it can only be replaced.
5, Battery short circuit fault
Its crucial behavior is the self discharge caused by the small lead block at the short circuit touching the positive and negative polarity, which seriously affects the battery's service life.
Repair method: Remove the lead slag and blocks at the short circuit point, and restore the repair by installing new partition paper.
6, Battery open circuit fault
Its crucial behavior is that the resistance at a certain point in the circuit is too high due to disconnection, and the current cannot pass through normally.
Repair method: Use a multimeter to check the various connections inside the battery, locate the disconnected points, and then re weld them.
In fact, in daily life, it is also necessary to increase the maintenance of the battery, in order to maximize its service life. In addition, if you encounter these six major battery failures that cannot be resolved, it is suggested to go to a repair point as soon as possible to avoid causing new problems.
