NIO has started to deliver the first batch of mass-produced pure electric SUV ES8. NIO offers two versions: the base version at 448,000 yuan and the Genesis version at 548,000 yuan. If you rent a battery, you can save another 100,000 yuan (348,000-448,000 yuan). The corresponding monthly rental fee for the battery is 1,280 yuan/month. The pure electric ES8 is equipped with a large-capacity 70kWh lithium battery pack and has a comprehensive operating range of 335km. NIO provides a variety of charging and battery replacement modes, including battery replacement, and the entire battery replacement process only takes three minutes. Regarding NIO's battery replacement technology, let's follow Xiaoxing to learn about it through relevant patents
↑NIO ES8 pure electric powertrain (photo taken at the 2017 Shanghai Auto Show)
NIO provides a variety of charging and battery swapping modes, giving consumers multiple choices. Consumers can choose to charge or swap batteries according to their own circumstances.
1. The battery can be fully charged in 10 hours using a home charger
2. The battery can be fully charged in more than an hour using a 50kW fast charger
3. You can use the APP to summon a mobile charging vehicle, which can provide 100 kilometers of battery life in 10 minutes.
4. You can drive your vehicle to a battery swap station and replace the battery with a new one in 3 minutes.
5. You can use the APP to call for a battery replacement service, go to a designated location to remove the empty battery, charge it, and then return it
↑NIO Mobile Charging Vehicle Service
The reliability and efficiency of battery replacement are guaranteed based on patented technology. In the early days, battery replacement services were tested in the new energy taxi market. Automated devices must be introduced in the battery replacement process, otherwise the manual battery replacement cycle is long, the cost is high, and there are reliability issues. Tesla should be mentioned here. Tesla also has corresponding technical reserves for battery replacement. Judging from the technical patents, Tesla can currently support 15 minutes of fully automatic battery replacement service. However, Tesla’s requirements for this service are very demanding. Customers are required to make appointments a long time in advance, and there are strict restrictions on the customer’s battery and service outlets. NIO has shortened the time of fully automatic battery replacement service to 3 minutes through the following patents. And the overall reliability of the replaceable battery pack is guaranteed by a special patented locking device.
↑NIO's patented fast battery swap mechanism
The battery locking and unlocking device is provided with a torque sensor. The torque sensor can detect the torque value when the battery locking and unlocking device locks or unlocks the battery. And transmit the detected torque value to the control system. The corresponding sensor can also detect the rotation angle when locking and unlocking to ensure that the rotation angle is not too large or too small under the premise of ensuring the torque. And the wear degree of the locking and unlocking device can be monitored in real time through the control system.
↑ Patent application diagram of NIO's fast battery replacement locking mechanism
Let's take a closer look at the structure of the battery swap station. The battery swap station consists of two parts: the battery swap platform and the charging platform. The parking base of the battery swap platform is equipped with a car positioning system and a lifting device. When an electric vehicle needs to be replaced, the electric vehicle to be replaced is parked on the parking base of the battery swap platform. After being positioned by the car positioning system, the electric vehicle is lifted to a certain height by the lifting device. Then the battery swap system replaces the electric vehicle. And the replaced battery is transported to the battery rack of the charging platform.
↑ Patent application for NIO's fast battery swap station
Let's take a look at the various units of the battery swap station through the patent application diagram of the composition of the NIO Automobile Rapid Battery Swap Station System. In addition to the battery swap platform and charging platform mentioned above, the battery swap station also includes a battery swap system and a control system. The control system includes a charging and swapping control module, a communication module, and a human-computer interaction interface. Users can operate the control system through the human-computer interaction interface for management. Through the communication module, various equipment and battery status of the battery swap station are uploaded to the cloud service system. The battery swap system mainly uses a battery swap robot car to realize battery replacement between the battery swap platform and the charging platform. The battery swap platform includes a vehicle positioning system, a lifting system, and a safety device. The charging platform refers to a charging rack composed of a battery storage module and a lifting module.
↑ Patent application diagram of the system composition of NIO's fast battery swap station
The working process of automatic battery replacement at the NIO Rapid Battery Swap Station is as follows: the electric car reverses along the guide slope into the battery swap platform, and the car positioning system automatically adjusts to a certain position. The battery swap system obtains the fully charged power battery from the charging platform, moves to the bottom of the electric car, replaces the battery, and then sends the removed low-power battery to the charging platform to start charging. After the battery swap is completed, the electric car moves forward to the battery swap platform. The entire battery swap process is controlled by the control system, which communicates and exchanges signals with the upper-level cloud service system to transmit the current status of various equipment and batteries at the station in real time.
↑ Patent application diagram of NIO's rapid battery replacement process
With the help of up to 10 battery unlocking devices and battery locking mechanisms, the servo motor of the fast battery swap robot can automatically and quickly lock and unlock the battery pack. During the entire battery swap process, the electric cylinder set up for the seat of the battery swap car can drive the first positioning pin to be inserted into the first positioning pin hole. Then the battery swap platform rises under the drive of the lifting mechanism, so that the second positioning pin is inserted into the second positioning pin hole for the second positioning. This allows the battery swap car to position the power battery more accurately.
↑ Exploded view of NIO's fast battery-swapping robot
The power battery locking and unlocking device is unlocked by the servo motor. After unlocking, the battery locking and unlocking device is reset. The low-power battery descends with the battery swap platform and is transported away by the battery swap cart. It is exchanged with the fully charged battery on the charging platform, and the fully charged battery is transported to the bottom of the electric car. The first positioning pin rises again and is inserted into the first positioning pin hole, and then the battery swap platform lifts the battery into the electric car. The power battery locking and unlocking device is locked by the servo motor. After locking is completed, the locking device is reset, and then the battery swap platform is reset, and the entire battery swap is completed.
↑ Patent application for NIO's fast battery-swapping robot
Through the introduction of NIO's related patents, Xiaoxing has shown everyone the technical details of how a battery swap station can automatically complete a battery swap within 3 minutes. NIO provides a new choice for customers through the battery swap service of the battery swap station. As cities such as Shenzhen gradually deploy corresponding battery swap stations, NIO will establish a total of 1,100 battery swap stations in multiple cities. I hope that users who purchase ES8 will soon be able to experience the convenience of the corresponding service.
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