Difficulties continue to increase as BYD successfully overcomes the technical challenges of CTB, further validating the safety of the entire vehicle

BYD's successful overcoming of technical challenges in CTB validates the vehicle's safety, despite increasing difficulties

【Phoneauto News】Recently, the domestic automotive safety testing program TOP Safety selected the BYD Dolphin to conduct a double-sided pillar collision test to verify the significance of CTB technology for the safety of electric vehicles. The BYD Dolphin, equipped with CTB battery-body integration technology, successfully passed the challenge in the double-sided pillar collision test, including the driver’s side pillar collision test, the passenger side rear pillar collision test, and the battery pack reuse test after two pillar collisions.

This test adopted the form of double-sided pillar collision, which increased the difficulty of the test on the basis of a single pillar collision, simulating more extreme multiple impact conditions, making it even more challenging for new energy vehicle models. In this double-sided pillar collision challenge, the BYD Dolphin CTB used the same car to perform a second side pillar collision on the basis of a standard side pillar collision. In the first collision test, the BYD Dolphin vehicle collided with a 254mm rigid steel pillar at a speed of 32km/h and an angle of 75 degrees. Then, the same car performed the second collision test by overlapping the collision point on the passenger side rear.

Double-sided pillar collision test (first side pillar collision)

Double-sided pillar collision test (second side pillar collision)

The test results show that the maximum deformation of the BYD Dolphin’s overall vehicle structure is 183mm, which is about 120mm less than the average deformation of around 300mm for traditional fuel vehicles. This indicates that the CTB battery-body integration technology effectively improves the overall vehicle structure strength and ensures the structural safety at various impact positions from front to rear, further verifying the overall safety of the vehicle.

BYD Dolphin Test Data Results

Battery safety: After two collisions, the battery pack only produced slight deformation on the frame, with no damage to the charged components. The main structure of the battery pack remained largely unchanged, and there was no leakage or fire. The overall structure remained stable. At the moment of impact, the vehicle’s battery management system immediately executed high-voltage power-off protection strategy, quickly lowering the high-voltage system voltage to a safe range within 820 milliseconds after the collision, effectively ensuring the safety of the occupants.

BYD Dolphin successfully powered on after double-sided pillar collision

In order to further test the safety and stability of the battery pack, TOP Safety also participated in two side pillar collisions. After the battery pack was reinstalled in another new vehicle, the vehicle could start and drive safely, proving that the functionality of the battery pack remained normal after the collision.

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