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Recently, SAIC-GM released a series of videos of the battery safety performance test of the Aoteneng electric vehicle platform, which carried out needle prick test, squeeze test, drop test, etc., and the excellent results showed that the international first-class and far exceeding the national standard development standard of the Aoteneng electric vehicle platform.
In the drop test of the battery pack, the engineer suspends the battery to a position of 2 meters high and releases the fall in the form of free fall, which is higher than the 1 meter high of the national standard, and this height puts forward higher requirements for the strength of the battery pack. In the national standard specification, after the battery pack falls, it needs to be free of electrolyte leakage, no fire, and no explosion, and after the fall of the Aoteneng battery pack, the entire battery pack does not have any abnormality.
Drop test
Vehicles in the driving process will inevitably encounter a variety of extreme situations, accidental collisions, at this time the battery pack will usher in the ultimate challenge, extrusion test is to fully consider the stability of the battery pack in extreme cases, in the national standard, the outside world to apply 100KN pressure to squeeze the battery pack, keep 10 minutes after the battery pack must ensure that there is no fire, not explosive, and SAIC-GM's extrusion test standard is higher than the national standard 3 times, with 300KN super strong squeeze battery pack, under such an extremely harsh test, Aoteneng battery pack can still achieve uncontrollable phenomena such as no fire and no explosion, and such a stability performance can ensure that the vehicle gives the driver and occupants sufficient time to escape after a violent collision.
Squeeze test
The use of ultra-strong materials meets the strict safety and collision requirements
The stability of the battery housing is a key to the pure electric vehicle model, the Aoteneng electric vehicle platform adopts a new generation of high-strength battery housing, and the positive electrode of the battery cell adopts nano-scale coating + directional doped transition metal atoms, which is 10% higher than the thermal stability of the 811 basic formula. The battery inside the use of high-strength tic-tac-toe structure, of which the package beam and the upper cover assembly side protection beam 1500MPA ultra-high-strength steel, pallet assembly 1000MPA high-strength steel bottom protection, 37.5% of ultra-high-strength steel applications, about 61% of high-strength steel applications, the whole package of anti-extrusion performance up to 3 times the national standard requirements, in the collision effective protection of cells and module safety, the strength of the battery pack is quite high. In addition, at the connection level, the battery pack body is applied to remote laser welding of 23.2 meters, laser wire filling welding of 15.5 meters, and the shell alone meets GM's global 42 items, and the strict battery housing performance requirements.
How to connect the battery pack of pure electric models with the body is also a problem that plagues many manufacturers, Aoteneng electric vehicle platform solves this problem very well, in the design, in the material level of Theodon platform has made innovations, using a comprehensive multi-position column impact protection capability, compared with the international and domestic inspection of the side of the single position column impact capacity column touch standard, SAIC-GM column touch standard is more stringent, simulating from A column to C column continuous multi-position column collision, examining the strength of each area of each row of modules. In addition, the battery shell also increases the torsional stiffness, an increase of about 45.8%, compared with the traditional fuel vehicle, the vehicle's torsion resistance is more excellent.
All-round thermal diffusion protection design forms 7 "firewalls"
Vehicles in the extreme situation encountered in the unexpected situation is often uncontrollable, in addition to considering the performance after the fall, squeeze, the company will also consider the needle prick performance of the battery pack, the national standard standard, the battery pack temperature above 0 ° C, the battery capacity is greater than 95% of the case of the needle puncture after standing for 5 minutes need not to fire and do not explode; and the general test conditions are more stringent, first of all, before we test, first put the battery pack into the temperature of more than 48 ° C in the incubator, simulate the extreme high temperature situation, after starting the test After the steel needle is pierced, it will cause the cell to run out of thermal control, and a large amount of heat will be released in a short period of time, at this time, the Aoteneng battery pack can quickly discharge high-temperature gas through the exhaust channel, and the heat is effectively isolated through the aerospace-grade nanomaterial aerogel, and the surrounding cells remain stable without heat diffusion.
Acupuncture test
Through more stringent test conditions than the national standard, we can see that the SAIC-GM Aoteneng battery pack can still guarantee good stability under the extreme environment, and the safety has withstood the test, so that the vehicle will not cause irreversible secondary damage in the event of an extreme collision or accident.
How did such excellent results come about? Originally, the Aoteneng battery adopts a real-time intelligent monitoring system, the use of aerospace-grade thermal insulation materials between the cells of a new generation of aerogels, patented safety valve + fast exhaust channel design, high-voltage components in the core after the thermal runaway of the arc design, rear large-area explosion-proof valve, battery pack cover built-in aerogel fire blanket, module integrated liquid cooling system and other black technology, through the all-round heat diffusion protection design to form 7 "firewalls", which is the reason why the Aoteneng electric vehicle platform is trustworthy.
Constantly improving the system Safety is a prerequisite
The Aoteneng electric vehicle platform can be said to embody SAIC-GM's adherence to product safety, and SAIC-GM's new energy technology system is an important support for the company's electrification strategy to go steady and far-reaching. By fully integrating the experience accumulation and superior resources of both parent companies, SAIC-GM has accumulated in the field of new energy, laid out the SAIC-GM Ultium Aotene Super Factory, the Pan-Asia Automotive Technology Center New Energy Test Building and the Guangde Battery Safety Laboratory, and has the ability to complete the new energy system from technology research and development, test verification, production and manufacturing to local procurement, which is second to none in the domestic OEMS, and provides a strong technical guarantee for the landing of the Aoteneng electric vehicle platform in China.
After 10 years of accumulation, SAIC-GM built the two "three electric" technology test centers of the Pan-Asia Automotive Technology Center New Energy Test Building and the Guangde Battery Safety Laboratory in March 2021, improving the whole process of electrification test and development capabilities, covering the main test and verification projects of the core three electric components of new energy models, and providing a strong engineering blessing for the development of enterprise electrification. The New Energy Laboratory of Pan Asia Automotive Technology Center (New Energy Test Building of Tangzhen Park) covers an area of 9,000 square meters. In accordance with the highest standards and process system construction of the GM Laboratory, it covers the main verification and test capabilities of the core three electric components of new energy models, batteries, electric drives and electronic control systems, and fully reserves the test upgrade and expansion capabilities of next-generation projects. At present, the laboratory contains several sets of battery/module performance benches, large package performance durable benches and 2 large three-integrated vibration test systems, which can provide test platforms of different sizes, different capacities and different environments for light mix, strong mix, plug-in hybrid and pure electric models, and can support the performance and durability tests of batteries, modules and whole packages.
Guangde Battery Safety Laboratory covers an area of 800 square meters (located in the supporting area of Guangde Test Yard). Guangde Battery Safety Laboratory has four independent test areas: performance and durability laboratory, thermal stability laboratory, needle punch extrusion laboratory, short circuit & overcharge and over-discharge laboratory, with a total of 14 main equipment. Whether it is from equipment technical defense, safety control to test operation management, SAIC-GM test base test standards are higher than the mainstream laboratories in North America and China, and the test capabilities cover overcharge and over-discharge, short circuit, needle punch extrusion, thermal diffusion, thermal stability, etc., supporting battery cell, module and whole package life cycle test. Among them, the thermal stability laboratory (only for battery cell testing), the needle punch extrusion laboratory, and the short-circuit/overcharge and over-discharge laboratory are unique to Guangde (the performance endurance laboratory is consistent with the function of the Pan-Asia New Energy Laboratory).
LYRIQ officially landed User demand is always the first
THE LYRIQ, SAIC-GM's first domestic model, cadillac true luxury pure electric medium and large SUV, built on the Aoteneng electric vehicle platform, has opened pre-sale in November and will be officially delivered next year. In just 1 hour of opening a booking at LYRIQ, more than 1,000 orders were made.
With the technical features of the Aoteneng platform, Cadillac LYRIQ offers distinct advantages over its peers in terms of intelligence, safety and performance. Among them, in terms of intelligence, the platform adopts the industry's innovative wireless battery management system, removing 90% of the low-voltage wiring harness of the battery pack, improving the volume energy density while the management efficiency is higher, and the vehicle OTA upgrade is more convenient; at the safety level, the endorsement of the above-mentioned multiple battery safety tests and safety technologies has long been beyond doubt its ability to protect safety; at the performance level, the new platform can support the highly integrated electric drive unit up to 8 in 1, and support the whole life cycle fast charging, which has basically no impact on the battery capacity, it can be said LYRIQ truly defines a new benchmark for luxury all-electric models at the level of a three-electric system.
In the field of pure electric vehicles, GM is actually one of the earliest brands involved, as early as 1996 launched the over-production pure electric vehicle EV1, to now based on the Aoteneng electric vehicle platform to build the first domestic model Cadillac true luxury pure electric medium and large SUV LYRIQ has begun pre-sale, will be delivered next year. Behind this, as the cornerstone of GM electrification, Aoteneng electric vehicle platform is currently the industry leader in terms of technical performance, safety performance and scientific and technological performance. It is reported that by 2025, SAIC-GM will launch more than 10 domestic new energy models based on the Aoteneng electric vehicle platform, covering multiple market segments such as cars, SUVs and luxury SUVs, and it is expected that the Aoteneng electric vehicle platform will bring us more surprises in the future.