How did Geely Galaxy answer the security test question L7?

Copyright notice: The copyright of this article is owned by NetEase Motors. Please indicate the source for reprinting.

NetEase Auto reported on July 26 New cars, especially new energy vehicles, all kinds of rolls. Take a hybrid car for example. If you have a hybrid system with one gear, someone will launch a two gear system, followed by a three gear system. As the representative of the three gears (3DHT), Geely Galaxy L7 （ parameter | picture ）After the coiling and mixing this time, its set of coiling gears began to rotate again... This time, the coiling was safe.

■ The first line of defense: how to do the body structure?

The new energy vehicle is just a different form of energy. It is essentially a car, so the safety of the body structure is not only related to the safety of systems such as batteries, but also directly related to the final safety performance of the passengers on the vehicle. In this respect, I used a relatively "stupid" method, that is, desperately "stacking" materials. For example, there is a large aluminum alloy anti-collision beam in front of me.

The rear anti-collision beam is made of 980MPa high-strength steel:

In terms of the design of the front part of the car body and the floor, multiple transmission paths are also used to disperse the energy during the collision. This can better ensure the integrity of the body structure, protect the members in the car and the lower battery pack - this is the same as the strength performance difference between a chopsticks and a chopsticks.

The body stiffness of new energy vehicles is also an important indicator, which will not only affect the safety performance, but also affect the comfort performance of vehicles such as NVH. Geely Galaxy L7 has made the torsional rigidity of the whole vehicle reach 23000Nm through integrated door rings and other processes, combined with hot formed steel materials.

If those above are the mainstream safety technologies, Geely has also made new innovations - they have introduced the CBS adhesive block which is composed of nylon glass fiber skeleton and epoxy resin structure expansion adhesive, and it is closely combined with the BIW through high-temperature process in the painting workshop, which can better realize the functions of strength improvement, shock absorption, etc.

■ The second line of defense: how to do with the chassis?

Plug in hybrid electric vehicles not only have traditional engines, fuel tanks, but also power battery packs, electronic control units, high-voltage harnesses and other electrical components. These parts are not only related to safety, but once damaged, the maintenance cost is also very considerable, so stronger protective measures are very necessary.

Of course, the first thing we look at is the most expensive battery pack

Other electrical components are also well protected:

Since it is oil electric hybrid, the safety of oil tank is also a factor to be considered.

In some details, we also see the safety considerations. For example, the support points of the chassis for lifting are marked on the side wall, which can avoid unnecessary damage to chassis components, especially pipelines, due to improper support.

■ The third line of defense: are all questions chosen?

Every car sold on the market has passed various safety tests conducted by manufacturers and third-party organizations, including both national standards and industry standards. Those beyond the coverage of these standards are called non-standard tests (in fact, we have known about Geely's higher standard tests before, Click to read: Water fire four hit test ）。

Geely Galaxy L7 has gone through many non-standard tests, especially for battery packs - if they are used as examinations, they should all be selected as questions. In particular, the whole vehicle can pass stably under such working conditions as bottom scraping (including front and rear), negative sill impact and whole vehicle bottom support.

Conclusion:

After watching Geely Galaxy L7 do this set of "questions", do you think that there is a reason why China's new energy vehicles are so high? In any case, the final beneficiaries are consumers, which is enough.