Shulou(Shulou.com)11/24 Report--

Recently, in order to verify the significance of CTB technology to the safety of electric vehicles, TOP Safety, a domestic automobile safety test program, selected BYD Seal to conduct a double-sided side pillar collision test of new energy vehicles. In this experiment, the passive safety and battery safety of the new energy vehicle superimposed with two side pillars are tested by simulating the real and harsh scene.

BYD Seal, equipped with CTB battery body integration technology, successfully passed the challenge in the TOP Safety double side post collision test, which challenged the main driver side post collision test, the co-driver rear side post collision test, and the battery package reuse test after two side post collisions.

The challenge of double-sided side column impact test is even more difficult.

For the new energy vehicle, compared with the traditional fuel vehicle, it is necessary to consider not only the whole vehicle structure and occupant protection safety, but also the electrical safety after the collision, while the side column collision has more concentrated collision points and smaller collision area than the frontal collision. it will produce a strong "cutting force" to the vehicle, which is extremely difficult for the new energy vehicle with battery pack at the bottom.

This test adopts the form of double-sided side column collision, which greatly increases the test difficulty on the basis of a single side column collision, simulates more extreme serial impact conditions, and the test of new energy vehicles is even more difficult.

BYD Seal CTB successfully passed the Challenge

BYD Seal CTB in this double-sided side post collision challenge, using the same car, on the basis of a standard side post collision, once again side post collision. In the first collision test, BYD Seal hit the 254mm steel column at the speed of 32km/h and an angle of 75 °, and then carried out the superimposed second collision test of the same vehicle, and the side post impact test was carried out at the rear impact point of the co-driver.

Double-sided side column impact test (the first side column collision)

Double-sided side column impact test (second side column collision)

The test results show that the maximum structural deformation of BYD seals is 183mm, compared with the average 300mm deformation of traditional fuel vehicles, the maximum deformation of seals equipped with CTB technology is reduced by about 120mm. It shows that the CTB battery body integration technology can well improve the structural strength of the whole vehicle, ensure the structural safety of each impact position from front to rear, and further verify the safety of the whole vehicle.

Results of BYD seal test data

The excellent performance is due to the unique body structure of BYD Seal. Compared with the traditional body structure, the body longitudinal beam of the CTB battery body integrated structure reduces the height difference between the front cabin and the crew cabin, which can give more effective play to the strength advantage of the material itself and provide a smoother path for force transfer. The full flat floor design makes the seal's body-in-white lateral force transmission structure more stable and coherent.

In terms of occupant protection, under the excellent structural safety foundation and airbag buffer protection of CTB, the three occupant protection indicators of the whole vehicle have all reached full marks, maximizing the protection of every user's life and safety.

In the battery safety part, after two collisions, the battery package only slightly deformed in the frame, the charged part was not damaged, the main structure of the battery package was basically not deformed, the battery package did not leak or catch fire, and the overall structure was stable, and at the moment of the collision, the vehicle's battery management system immediately implemented the high voltage power off protection strategy, and the high voltage system voltage dropped rapidly to the safe voltage range within 820 milliseconds after the collision. Effectively ensure the safety of drivers and passengers.

In order to further test the safety and stability of the battery pack, TOP Safety also conducted a more difficult test than Yadi Seal. After the battery pack that participated in two side post collisions was reloaded into another new car, the vehicle could start normally and drive safely, proving that everything was normal after the collision.

BYD Seal successfully powered up the battery after the double-sided side post was touched.

This benefits from the application of CTB battery body integration technology, through the whole vehicle sandwich structure, the blade battery is not only an energy body but also a structure advantage, outstanding safety design, so that the battery safety performance is greatly enhanced, CTB integrated design optimizes the force transfer path, effectively protects the internal structure, outstanding performance.

BYD CTB technology fully shows that safety is the greatest luxury of electric vehicles.

With the gradual upgrading of automobile consumption, people pay more and more attention to the safety performance hidden in the appearance of the car. In the double-sided side post collision test, BYD Seal successfully passed the test with the combination of blade battery and CTB technology to make the car body have sufficient energy absorption space and smoother energy transfer path, and performed well in vehicle safety and electrical safety.

CTB battery car body integrated structure

CTB technology takes "battery body integration" as the core design concept, and finds inspiration in "honeycomb". Combined with the unique cuboid structure and super strength of blade battery, the "honeycomb-like aluminum" structure is derived, which brings about a milestone innovation in battery group technology. by rigidly connecting the blade battery pack with the car body, the two form a whole and integrate the floor (cell cover)-battery core-tray with the car body. Form a high-strength "truckload sandwich" structure.

Under the CTB technology, after the blade battery pack is integrated with the car body, the wide package battery, as a rigid structural part, strengthens the body ring structure, while optimizing the battery package frame structure design, the battery cover, cell and frame participate in the vehicle force transfer, further strengthen the chassis structure, balance the vehicle center of gravity, greatly improve the vehicle strength and achieve the industry-leading level of safety.

At present, when the penetration rate of the new energy vehicle market has exceeded 30%, the market attention to the safety of new energy vehicles has also reached an unprecedented height. Prior to this, BYD Seal's long-range rear drive version got a five-star score in C-NCAP, with a comprehensive score of 88.6%, which verified the safety of BYD Seal.

In this TOP Safety double-sided side post collision test, BYD Seal proved the safety of CTB battery body integration technology through the test. BYD Seal, equipped with CTB technology, gave a very powerful answer to the vehicle safety and battery safety of new energy vehicles.

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