If you are a new energy vehicle owner, then you must be no stranger to the brand BYD. BYD, as a giant in China’s new energy vehicle industry, has committed itself to technological innovation. It has the world’s leading battery, motor, electric control, vehicle and many other core technologies. Among BYD’s many technologies, have you heard of CTB (cell to body) battery technology? Its full name is CTB Battery Body Integration Technology. The emergence of this technology has made electric vehicles have a qualitative leap in various aspects such as endurance, control, and safety. Don’t worry, today we will learn what CTB technology is.
Know the structure of the battery technology
The traditional battery Pack uses the MTP(Module to Pack) structure technology, that is, the form of a battery pack composed of batteries and modules. Modules are formed by a plurality of batteries, and a battery pack is created by combining a plurality of modules with a battery management system, breeding module, and other components. In this way, the external structural parts effectively protect the cell, ensuring good structural strength. However, because the connection materials between multiple modules occupy most of the space of the battery pack, the utilization rate of the battery pack is very low. And because of this complex connection structure, it will increase the weight of the battery pack and reduce the safety of the battery pack.
In order to improve the space utilization and energy density of battery packs, CTP (Cell to Pack) structure technology came into being. In this way, the battery cell is directly integrated on the battery pack, eliminating the traditional module in the middle. The prominent representative is still BYD’s blade battery. BYD cut the positive and negative plates into single pieces and fixed them to the diaphragm by hot pressing, and then inserted them into the folded diaphragm in an orderly manner. In BYD’s CTP modular scheme, the battery cell functions directly as a module, with the protective housing of the module omitted and the blade battery itself serving as the beam of the battery. This significantly enhances the space utilization rate and also boosts the system’s energy density.
What is CTB battery Technology?
CTB technology is BYD’s further innovation on the basis of CTP technology. If CTP is just a battery pack technology, CTB is a class of vehicle technology. The most direct way to increase the battery life of electric vehicles is to increase the battery capacity. But the problem is that the weight of the battery goes up, which leads to an increase in power consumption. Increase the battery capacity, resulting in the gain of battery life is constantly decreasing, and the safety risks are also constantly improving. The CTB technology released by BYD provides a standard solution.
The so-called CTB technology is the integration of battery and body. To put it bluntly, the battery pack and chassis are integrated into one, and the battery cover is further integrated with the body floor. Let the battery pack directly become a part of the body structure, and the power battery is both an energy body and a structural body. From the original battery pack “sandwich” structure, evolved into a vehicle “sandwich” structure. This fusion simplifies the body structure and production process, which is a subversive change to the traditional body design.
What are the benefits of CTB technology?
Improve space utilization
Because CTB technology simplifies and directs the structure, it allows for more cells to be loaded into a limited space. This action increases the battery capacity and extends the driving range without adding unnecessary weight.This new way of cell integration realizes the transformation from body integration to battery body integration. The space utilization rate is improved and the performance of electric vehicles is further released. It is worth mentioning that the CTB technology uses the battery upper cover plate as the design of the cabin floor, freeing up the space occupied by the battery pack. In disguise, it increases the riding space in the car and improves the comfort of passengers.
Enhanced battery safety
Because the chassis provides the space to hold the battery pack, the battery becomes part of the chassis. Instead of the battery pack protruding downward like a traditional tram, the vehicle’s mobility is improved. The risk of debris scratching the battery and impacts puncturing it is also minimized. Through the integrated battery body design, CTB technology enables the vehicle body to have sufficient energy absorption space and smooth energy transmission path in the event of a collision, thereby reducing the deformation of the passenger cabin and reducing the risk of casualties caused by collision accidents. The test proved that it can ensure safety even in the face of 50 tons of heavy trucks.
Optimize control experience
CTB technology achieves a high degree of integration between the body and the battery system, which doubles the torsional stiffness of the vehicle. This upgrade not only improves the vehicle’s handling performance, but also gives the vehicle more lateral support when turning. The roll of the vehicle through the corner at high speed is smaller and the body attitude is more stable. After simplifying the body architecture, the vibration of the body will naturally be reduced. At the same time, the full flat design of the vehicle chassis reduces the wind resistance coefficient and further reduces the energy consumption of the vehicle. It can be said that CTB technology has more intimate care for both drivers and passengers.
The first model of CTB technology — BYD Seal
BYD’s Seal model is the first to be equipped with CTB technology and is one of the best-selling models. Seals use lithium iron phosphate batteries with a relatively low energy density. Thanks to CTB technology, the range of the SEAL model easily exceeds the upper limit of 600 kilometers, which greatly meets the life needs of most users. It has to be said that this car’s 100km acceleration only needs 3.8s, which is why the car manufacturer is proud to print the words “3.8s” on the trunk. If you are interested in this car you can click here to learn more. You can also learn more by reading this article.
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