The vigorous development of the lithium battery industry has accelerated the normalization of lithium batteries for electric bicycles, and the implementation of the new national standard has more standardized the hard standards of the market, although there are no mandatory requirements, but to meet the standards of the new national standard, the choice of lithium batteries may be the only optional for electric bicycles. However, with the increasing application of lithium batteries, the ensuing maintenance problems are becoming more and more obvious. The characteristics of lithium batteries and batteries are different, so there are great differences in the way of maintenance, use and charging. When we use electric bicycle, we will inevitably encounter water problems or rain-rich season, when the battery and lithium batteries are soaked in water, the two types of battery treatment is completely different.
(A) Electric bicycle battery (lead-acid battery) treatment after being soaked in water
Electric car battery is not particularly afraid of water, because lead-acid batteries are usually sealed state, a short time wading does not lead to internal water, but if the location of the wading has not over the electrode, and produced a certain time of immersion, then you need to check the voltage of each battery, and electrode connection if the screw locking, need to disassemble clean water, respectively measure each single group of batteries voltage is consistent, if the pure in a certain difference, you can choose to use a 12V lead-acid battery charger to each group of batteries individually fully charged, in order to restore the balance of the group battery state.
(B) Electric car lithium battery into the water after the treatment
The group of electric car lithium battery generally contains control protection circuit to manage the battery charging and discharging, electric car lithium battery slightly into the water, we must first disconnect the input and output circuit of the lithium battery, first check and clear the BMS protection board position of the water, because here is the whole group of lithium battery circuit concentration, first clean the protection board position can effectively prevent the secondary short circuit.
If the electric car lithium battery is water-soaked, serious water, if the lithium battery core waterproofing is not in place to cause the core is also water-soaked, we have to distinguish the type of the core, the following are several ways to deal with the core
(1) 18650 / 21700 cylindrical electric car lithium battery pack, the location of the core is water immersion recommended for direct scrap, not recommended for reuse. Because the cylindrical lithium battery is a metal steel shell, lithium battery will generate a certain pressure inside when charging and discharging, when the pressure to a certain value, the pressure will be discharged through the safety valve, the lithium battery after being soaked in water may lead to the effectiveness of the safety valve, so that the battery is in a dangerous state of work, easy to produce an explosion and fire accidents, and the positive and negative position of the cylindrical lithium battery is very close to the impurities in the water is easy to make the Battery short circuit and failure. And cylindrical battery pack nickel sheet distribution is too wide, not easy to handle clean
(2) polymer soft pack or lithium iron phosphate soft pack and other large soft pack large monomer, this type of battery can try to repair, usually, the combination of soft pack battery location are in a direction easy to focus on processing, and soft pack lithium battery sealing is very good, so do not worry, but also do a good job of collecting data before repairing the best, such as the voltage and internal resistance of each single string cell and capacity status.
(3) square rigid lithium cell combination, this type of lithium cell combination of the battery will generally use a laser or screw locking way to connect the cell, processing is also more convenient, similar to soft pack lithium batteries
Summary.
Electric car battery into the water, lithium battery performance than the battery is more delicate some. Any type of lithium battery should be away from wading and water, the damage of lithium batteries into the water is huge, daily use need to try to avoid lithium batteries into the water
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