From the fire of Tesla to the dead end of protection

Not long ago, Tesla caught fire again in a car theft in the United States. What happened to Tesla? From the first unavoidable safety issue, to continuous fires, to a high-speed crash caused by a recent theft?

Technical strengths and weaknesses of the Tesla model

The rise of the Tesla model in electric vehicles relies on ultra-high-speed functions, controls, and battery life, as well as the more elegant and better appearance of the car itself.

These advantages of the Tesla Model do not come out of thin air. The battery life of Tesla models is longer than other electric cars on the market because it uses more dangerous batteries. The same weight can provide more power, so endurance has an advantage. Due to the high battery power, it has an excellent acceleration function.

Tesla’s handling is very good, the battery is on the chassis, the center of gravity is very low, and the engine is on the rear wheels, which is equivalent to a rear-wheel drive installed in the middle. The layout of this car is the same as that of a super sports car, so it has good handling and high quality of travel.

The reason why Tesla dared to use the high-risk ternary lithium battery is because Tesla has a battery processing system that can ensure battery consistency, handle accidents, and ensure the safety of charging and discharging. This is Tesla’s core skill. .

But in addition to charging and discharging, when an external force impacts to form a breakdown, the ternary lithium battery will also catch fire. This is not something that battery handling skills can handle, but physical maintenance.

By placing the battery on the chassis, Tesla provides the advantage of control while also exposing the most dangerous parts of the car to the bottom. Once the bottom of the car hits the lithium battery, it will be very dangerous. Tesla knows this and has done a lot of maintenance on the chassis. But in practice, Tesla is not perfect.

The safety of electric vehicle batteries

As for electric vehicles, battery safety has always been a core issue. The plans chosen vary.

Tesla’s plan is to focus on the battery handling system, handling each battery, relying on software to handle the safety of charging and discharging, and hard protection to handle failures. Choose battery life for high-risk ternary lithium batteries.

Tesla has done enough work to protect himself from these difficulties. High-strength aluminum alloy, ultra-high-strength steel, bulletproof composite materials. He scored the highest score in the safety test and suffered only minor facial injuries in a head-on collision with a BMW M5.

But because the battery’s azimuth angle is on the chassis, the three sides can be maintained, but the unevenness on the sides and bottom of the surrounding is incapable. In fact, these Tesla fires came from the sides and bottom. In the recent fire, the side of the car was hit at high speed, causing the car to collapse and the battery to collapse.

Similar to Tesla’s chassis layout, BYD’s E6 (same as Tang) has the advantages of a lower center of gravity, better control performance, and less space in the car. BYD’s choice of lithium iron phosphate is safer than Tesla’s ternary lithium battery. In the famous GTR crash in Shenzhen, it was not the battery but the distribution box that caught fire. But in general, the battery in the chassis layout is a more dangerous layout.

In addition to the bottom layout, another popular layout is the T-shaped layout in the car, which is used for Volanda, Audi R8E-Tron and Fiskama.

T layout

The advantage of this arrangement is that the battery is located on the central axis of the car and has little influence on the control. The battery in the cockpit is level with the passengers. If the battery is pierced, the person already has the posture of being shot. Because the battery broke through the fire, it just burned again, damaging people’s attitudes.

But this layout also has a problem. If the battery handling system is not good, it will be dangerous when it catches fire, charges and discharges, and does not collide. In addition, the cockpit battery takes up valuable space.

Ambitious electric car plan

From the current technology point of view, Tesla’s battery processing technology is relatively excellent, and the safety of lithium iron phosphate is relatively high. Tesla’s battery handling technology works well on the more dangerous ternary lithium battery, and the ternary lithium battery is also safer on lithium iron phosphate.

In the battery layout, the chassis layout still has the advantages of low focus and small space. However, for the sake of safety, efforts should be made to make appropriate improvements.

Tesla implanted batteries in the entire chassis to improve endurance, not just for the safety of the cockpit. The battery caught fire before the person in the accident

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