New energy vehicles are the development trend of future vehicles, but limited to basic charging facilities and the range of pure electric vehicles, the sales of electric vehicles have not risen. Of course, major auto companies are also increasing their own electric vehicle models through technological iterations. Endurance mileage or work hard on charging methods.

The reason why consumers buy electric cars is mostly because they have rigid car needs and are limited to local license policies. However, the actual experience after purchase is relatively ordinary, especially for users who do not have charging piles around their residences. It can be said that the charging is very good. pain.

The limited cruising range and long charging time seem to have brought new energy into a trough. How can we solve these problems? Adding battery packs to expand the range of electric vehicles; or improving battery technology to increase battery capacity; or increasing the charging efficiency of fast charging car batteries and shortening the charging time... Among them, shortening the charging time is currently a relatively easy technology to achieve.

The charging piles currently built support 2 modes of charging: slow charging and fast charging! This is like charging our mobile phone. There are two modes: fast charging and slow charging. In the fast charging mode, the fast charging car battery can be fully charged quickly, at least nearly 40% faster than the slow charging. The car charging here is also a similar concept, but the efficiency is much higher than that of mobile phones.

However, what you need to know here is that fast charging and slow charging are two concepts. Slow charging is alternating current charging. The time for full charging is generally 6-8 hours. In this charging mode, the battery suffers the least damage. The fast charging car battery is an emergency charging method that uses high-power DC charging (also AC fast charging). The voltage of this DC charging is generally greater than the battery voltage. The AC power needs to be converted to DC power through a rectifier device. The pressure resistance and protection of the power battery pack put forward higher requirements, and the charging current is large, which is ten times or even dozens of times the conventional charging current. A large number of electrons flow from the positive electrode to the negative electrode at a very high speed. The charging time of fast charge is generally 80% of the electricity in 30 minutes. Some car companies have made breakthroughs in technology and can charge 80% of the electricity in 5 minutes! This kind of charging efficiency is really high and scary, but the problem is also coming, will fast charging car battery affect the car battery?

Theoretically, fast charging car battery will affect the battery. After all, fast charging will reduce the cycle charging life of the battery, because the battery is converted into electric energy through chemical energy. Charging is a reverse chemical reaction. Frequent fast charging will reduce the battery’s reduction ability. Reduce the number of battery charging cycles.

In order to alleviate the negative effects of fast charging car battery, a very important component in electric vehicles-BMS power management system. For electric vehicles, BMS is the core component of fast charging. The main function of BMS is to intelligently manage and maintain each battery unit, prevent overcharge and overdischarge of the battery, extend the service life of the battery, and monitor the status of the battery.