Tell me some of my views on the Audi e-tron soft-pack lithium battery

Many friends who read the forum these days are very interested in the charging speed and battery life of e-tron. I happened to pass by the charging pile of the State Grid today, and I just took this opportunity to tell everyone about my feelings about e-tron. Some opinions and usage experience of tron ??soft-pack lithium battery. These are just my personal opinions~

I have known about e-tron batteries for a long time before buying a car. After all, the most important thing about electric cars is the battery. Just like the engine of a petrol truck, it is one of the main cores.

The battery used by e-tron is a soft-pack lithium battery, which is specially customized for Audi by LG Chem. LG Chem is the main lithium battery supplier for Audi, Mercedes and Volkswagen Group. The battery capacity customized for e-tron this time is 95kwh. The advantages are obvious. With the same battery volume, soft-pack lithium batteries have higher power storage than 18650 batteries and are lighter in weight.

To give a simple example, the e-tron battery weighs 685 kilograms and has an energy density of 135wh per kilogram. The Tesla Model?X battery weighs 900 kilograms and has an energy density of 111wh per kilogram. When the total energy density is similar, the e-tron's battery is 215 kilograms lighter, which is equivalent to losing the weight of two adult men. Moreover, the e-tron's flat battery layout makes the vehicle's weight distribution ratio Reaching 51:49, this evenly distributed weight ratio makes the e-tron particularly smooth to control, and it is very stable to drive even when the road is slippery in winter.

Many of the State Grid charging piles in urban areas now use this kind of DC fast charging. The charging speed is 120kw, but the actual charging speed is only about 80kw. If there are fewer cars charging at the same time, the speed will increase. Some.

When charging, the instrument and central control screen have real-time displays, including the current battery level and the remaining charging time. Just look at the display in the car. The display on the mobile phone charging APP is not very accurate.

Fast charging is also another advantage of soft-pack lithium batteries. Take the charging pile I use as an example. The average current is about 80kw. It takes about 80-90 minutes to fully charge. The charging speed is very fast. If There is a 150kw charging pile, which can be fully charged in about 40 minutes. It can be fully charged in the time it takes to drink a cup of coffee and browse Weibo. It takes nearly twice as long as a car with a traditional battery, and is very efficient.

e-tron supports both DC and AC power. The AC charging port is on the left. Unless you use a home charging pile to charge, it is generally not used. However, you can also install an AC charging pile at home when you buy a car. , you usually plug it in to charge when you get home, and it can be kept fully charged at any time. After it is fully charged, it will automatically cut off the power, so you don’t have to worry about overcharging.

The battery of e-tron is safer. The frame is an aluminum honeycomb structure battery frame and casing. It can disperse the impact weight and automatically cut off the high-voltage power supply when it encounters a collision. The battery compartment is completely sealed, making it suitable for off-road wading. It is not afraid of short-circuiting when it is soaked in water. It is very thoughtful. I have seen the previous 25% crash test. The left front wheel was knocked off, and the battery did not smoke or explode. It is reliable.

The e-tron’s battery is laid flat under the cockpit, so there is a lot of space in the engine compartment. I have seen many tram engine compartments empty. The e-tron is smart here. It has a relatively sealed storage space, which is a very pleasing design.

With advantages there must be disadvantages, that is, the cost is too high, and the price is much higher than ordinary 18650 batteries. However, there is no need to worry about the later use costs. e-tron divides the battery into 36 cells. Module, 12 soft-pack batteries. Even if a certain battery is damaged, the module where the damaged battery is located can be replaced separately without replacing the entire battery, which greatly reduces the cost.

Although the battery has a certain attenuation in winter, the cruising range of the e-tron I tested was around 400 kilometers, which was even a bit surprising within the acceptable range.

There is no problem in daily driving at this mileage. If the third-speed kinetic energy recovery system is used, the battery life will be improved. I am going to run a long distance in a few days to try out the feeling of running a long distance for the first time. Okay, having said all that, these are the reasons why I think soft-pack lithium batteries will become the mainstream battery in the future, and they are also the reasons why I chose e-tron when buying a car. I will share with you my feelings at any time in the future~