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402030 polymer battery manufacturers briefly analyze whether fast charging of new energy vehicles will shorten the life of lithium batteries
402030 polymer battery manufacturers briefly analyze whether fast charging of new energy vehicles will shorten the life of lithium batteries? As the pure electric vehicle industry continues to develop, the number of consumers choosing to purchase them is also gradually increasing. However, the power source of pure electric vehicles is lithium-ion batteries, so charging is essential for normal use. However, the ordinary charging mode takes a long time, which affects the convenience of using the car. Fast charging has become the choice of most car owners. The following is a brief analysis by a 402030 polymer battery manufacturer: Will fast charging of new energy vehicles shorten the life of lithium batteries?
402030 polymer battery manufacturers briefly analyze whether fast charging of new energy vehicles will shorten the life of lithium batteries?
The fast charging method generally uses a special non-vehicle DC charger for charging. This charger is installed at a fixed charging station and connected to the AC input power supply. The DC output end is connected to the charging interface of the electric vehicle that needs to be charged, which can meet the needs of charging. Requirements for high-power fast charging of electric vehicles.
The batteries currently used in new energy vehicles are basically lithium batteries, and lithium is a more active element than sodium. Fast charging will make lithium too active, causing the electrolyte in the 402030 polymer battery to precipitate, resulting in bubbles, which can easily damage the battery. Expansion may even cause the battery to explode, so the charging current should not be too large or fast charging should be minimized.
Studies have shown that fast charging technology will shorten the service life of lithium-ion battery packs, which has also kept the traditional concept of "fast charging damaging the battery" in consumers' minds. In fact, this statement is not absolute. Not all batteries will be damaged when using fast charging.
The difference between fast charging and slow charging of new energy lithium batteries
1. Based on the current technical level of electric vehicle power batteries, the best car usage habits are more slow charging and less fast charging. Although slow charging is low in time efficiency, it does no harm to the health of the power battery and can fully charge the 402030 polymer battery. Fuller.
2. The charging speed of electric vehicles is closely related to the charger power, battery charging characteristics and temperature. At the current level of battery technology, fast charging requires 30 minutes to charge to 80% of the battery capacity. After 80% is exceeded, in order to protect the safety of the 402030 polymer battery, the charging current must be smaller, and it will take longer to charge to 100%. In addition, when the temperature is lower in winter, the battery requires less charging current and the charging time will become longer.
3. A car has two charging interfaces because there are two charging modes: constant voltage and constant current. Generally, constant current and then constant voltage are used, so that the charging efficiency is relatively high. The reason why fast charging is fast is due to the difference in charging voltage and current. The larger the current, the faster the charging. When it is almost full, switch to constant voltage, which can prevent the battery from overcharging and also protect the battery.
4. The charging current and power of slow charging are relatively small, which is better for the life of lithium batteries and the charging cost is low during low power consumption. Fast charging will use larger current and power, which will have a great impact on the battery pack. , will also have an impact on lifespan. Fast charging also requires supporting equipment, such as converting AC to DC, which increases the cost.
The cycle life of the battery. The more fast charging a battery is used, the shorter its cycle life will be. Manufacturers also generally recommend that consumers reduce the number of fast charges and use normal voltage slow charges to extend the service life of the battery as much as possible.
The charging speed of new energy vehicle lithium batteries depends on the three indicators of battery density, temperature and material. In other words, one of these three indicators is not up to standard, and fast charging is very harmful to the battery. In addition, the role of the battery management system is also very important. It controls the input current and voltage during battery charging to minimize damage to the battery.
Today's new energy vehicles can adopt slow charging and fast charging modes. Slow charging generally takes 8 to 10 hours. Compared with lithium batteries, if you choose fast charging, its charging speed is very fast. At present, fast charging can basically fill a new energy vehicle in one hour. More than an hour is enough, but fast charging will also have a certain impact on the service life of the battery. If you are not in a hurry, just charge it normally.
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