In recent years, with the deepening of the concept of energy conservation and environmental protection, and the implementation of the national vision of " carbon peak , carbon neutrality ", new energy vehicle has ushered in unprecedented development opportunities and has emerged in the current Chinese automobile market. However, what follows is the concerns and concerns of consumers about the battery life, performance and safety of new energy vehicle batteries. Among them, the most widely concerned is battery safety. In the field of new energy vehicles, batteries are also a high-incidence problem of safety accidents. To improve safety performance of new energy vehicles, they also need to practice and test product safety performance through scene-based rigorous tests.
A few days ago, Hongqi E-QM5 was successfully passed the rigorous inspection in the electric vehicle bottom-up challenge test held by China Automobile Technology Research Center Co., Ltd. in the real vehicle collision test room of China Automobile Technology Research Center Co., Ltd., successfully passed the rigorous inspection, and comprehensively revealed the safety and reliability of the product battery pack after the vehicle wading and the bottom collision occurred.
For Electric vehicle , the battery pack is the lowest point of the chassis of the vehicle body and is a position that is particularly susceptible to bumps and squeezes. If the battery is damaged during driving, it will wading in water and then bumping again in the water, it is easy to cause water inlet and fire in the vehicle battery pack. In daily road traffic, when there is rainy season, road area, and drivers have poor vision, they will inevitably encounter chassis bumps when driving through the water surface, especially when vehicles encounter "collision and wading" or "collision during wading". If the vehicle's battery protection capability is not strong, it is very easy to cause electricity leakage and fire, which brings great safety hazards to drivers and passengers.
This Hongqi E-QM5 challenge test is a double bottoming challenge. It uses extremely strict working conditions to restore the real test conditions and sets the working conditions in which vehicles encounter chassis bumps and wading in daily urban road conditions: when driving, "the bottom collision occurs and the wading section" occurs, and the complex working conditions of "collision on the bottom battery pack" occur again. After the challenge vehicle Hongqi E-QM5 first collided with the road barrier at a speed of 20km/h, the vehicle chassis entered a 300mm deep puddle, and then collided with the underwater barrier again, with the overlap of the barrier and the battery pack being 25mm.
Hongqi E-QM5 electric car with bottom-up challenge in water is that the vehicle battery has been subjected to severe challenges again after a collision. A secondary collision in the water will cause a great impact on the sealing of the battery and the battery case, which greatly tests the battery's protection ability.
Usually, after the battery pack of an electric vehicle is subjected to the bottom collision test , the bottom of the battery pack will be sunken inward, and severe deformation will cause damage to the battery cell. The leakage of electrolyte may cause the battery to catch fire. Even some less severe deformation may cause damage to the bottom guard of the battery pack. Some brands of car battery packs integrate cooling plates in the lower box, which may lead to damage to the cooling plate and leakage of coolant , causing safety risks. After the test of
was completed, no above safety risk problems were found by dismantling the battery pack of Hongqi E-QM5. Among them, the physical protection and the electric shock protection performance of insulation resistance meets the standards; there is no leakage of electrolyte and coolant; REESS (vehicle rechargeable energy storage system) has no displacement, no fire, no explosion, and no water inlet; the vehicle can drive normally after the challenge.
It can be said that The Hongqi E-QM5 battery pack after the bottom collision was completely wading in the chassis, and the collision point was in full contact with the battery pack position, which still ensured the reliability and safety of the battery . It is worth noting that the barrier paint on the chassis fell off a lot after the challenge test, which is enough to prove that the collision strength of this challenge is large enough and the battery reliability is high enough.To this end, "Hongqi E-QM5 electric vehicle bottom-up challenge" was successful!
In fact, many brands have begun to pay attention to the safety of bottom collisions of new energy vehicles and have conducted some onshore bottom support tests, but the bottom support tests in the water of the vehicle are rare, and the double bottom collisions of the vehicle are unprecedented. To this end, this "Hongqi E-QM5 electric vehicle bottom-up challenge" is the first in the industry.
was able to successfully pass this challenge, which originated from the fact that the Hongqi E-QM5 battery pack adopts a multiple guarantee safety design to effectively prevent the occurrence of fire and explosion accidents. This not only reflects the safety and reliability of the battery pack, but also ensures the safety of the entire vehicle.
Among them, the power battery used by Hongqi E-QM5 performs multiple security protection designs from the battery cell and the system, achieving the security protection of the power battery system without thermal diffusion goal. The battery cell uses lithium iron phosphate battery core , which ensures the safety of the power battery pack from the core.
In addition, for power battery assembly systems, there has always been a problem with safety protection, which is high voltage insulation protection . The Hongqi E-QM5 battery pack structure adopts CTP grouping method to provide refined high-voltage insulation protection inside the assembly, improving the safety of the power battery assembly at the system level.
At the same time, on the structural design of the battery system, the Hongqi E-QM5 battery pack adopts the box under the "Feng" shape structure, and multiple beams are designed inside the box for reinforcement. The lower box integrates a liquid-cooled structure , which can reduce the number of water pipe connections in the package and reduce the risk of coolant leakage. The steel bottom guard plate at the bottom of the battery of Hongqi E-QM5 greatly improves the protection capability at the bottom of the battery.
History China FAW and Hongqi brands have always regarded product security as the top priority in R&D and design. Through the high difficulty of supporting the bottom of the electric vehicle in the water, Hongqi E-QM5 not only demonstrates the strong safety and reliability of the Hongqi E-QM5 battery pack, but also verifies the cutting-edge technical strength of Hongqi brand in the security level of product . The successful passage of this challenge provides an important reference for China's rising new energy vehicle market and injects a shot of augmentation for consumers who choose domestic new energy vehicles. With the outstanding safety performance of Hongqi E-QM5, it will win more and more consumers' trust and recognition of Hongqi brand and Chinese brand.
