Column rechargeable battery

　　Now, electric vehicles have become one of the indispensable means of transportation. Electric vehicles are a great option because of their convenience and low cost. Lithium batteries for electric vehicles are a key. If the battery is damaged, the electric vehicle will not be able to drive. We need to be careful when replacing the battery. There are several aspects that need to be paid attention to when replacing lithium batteries:

　　1. Battery capacity problem

　　It is feasible to replace lead-acid batteries and lithium-ion batteries with the same volume and operating voltage, but it is necessary to consider whether the size of the battery can still be installed in the original position and whether it will protrude or be squeezed, because extrusion and moisture will cause the battery to Internal damage occurs and short circuit failure occurs.

　　2. You must use a charger that matches the battery type. Even if lead-acid batteries and lithium-ion batteries have the same capacity and voltage, do not use chargers indiscriminately, because the two types of batteries require different charging voltages and currents at each stage.

　　Although lithium-ion batteries are still relatively stable, it is not easy to charge the battery when the temperature is too high or too low, and it is also easy to damage the battery itself. If the high-temperature battery is charged more seriously, it will continue to cause electric vehicles to explode. If it is a closed space, the battery explosion will also be accompanied by harmful gases, which is very dangerous. Therefore, the battery must be kept away from flammable and explosive objects when charging.

　　If possible, charge the battery outdoors. In fact, the safest way to recharge batteries is to do it outdoors. This is a place where you can be sure it won't be near anything flammable or where a fire could spread.

　　Low temperature affects the use effect and charging efficiency of lithium batteries. When lithium batteries are used in low-temperature areas in the north, the capacity of lithium batteries that are originally full of energy will be discounted, which brings a lot of trouble to users of new energy vehicles and digital products. . Rechargeable batteries have something in common with people. They are not as active in cold weather. Lead-acid batteries, lithium-ion batteries and fuel cells are suffering damage from low temperatures, but at different levels.

　　Take lithium iron phosphate batteries for electric buses as an example. The batteries have high safety factor and long service life, but their low-temperature performance improves the performance of other technical management systems. Low temperatures are harmful to the cathode, electrolyte and binder. For example, the electronic components of lithium iron phosphate batteries have poor conductivity and can easily cause polarization in low-temperature natural environments, thereby reducing battery capacity and reducing the intercalation rate of high-purity graphite caused by ultra-low temperature hazards.

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