Is Tesla a better wader than the average diesel?

2014 is undoubtedly the year of "electricity". The new energy subsidies are clear. Tesla is delivered in China. BYD Qin has a high-profile challenge to CRC. All major car dealers are also unable to withstand the launch of new energy vehicles. At present, the competitive landscape of such markets has not yet taken shape, and there are only a handful of pure electric vehicles that are available to all. New energy owners are even rarer than giant pandas.

Today, in summer, in addition to high temperatures, Mother Earth has prepared a harsh test - heavy rain. Isn’t the giant panda going out on rainy days? In the past, all fuel vehicles were in the water and the engine was scrapped. Now that a new electric car is coming, new technology will always bring new problems. Let's talk about the junior high school physics of electricity and water.

Is Tesla than the average diesel locomotive wading ability?

It is well known that the internal combustion engine needs to take in air to ensure the combustion of oil and gas in the cylinder, so the wading depth of the internal combustion engine vehicle is limited by the height of the intake port. Then, if an electric vehicle does not have an internal combustion engine, can it be free from such restrictions? What if the battery and motor are flooded after being flooded?

In fact, as early as 2012, there was a question from the owner of the Tesla official forum about wading. Until 2014, someone finally tried and gave the answer using ModelS.

“In case I drive to the flooded road, is the battery waterproof?”

"The good thing is that the battery pack (and the car) is heavy enough to float, so you have enough grip to drive away. If you have air suspension, rise to the highest."

"According to the Archimedes principle, the displacement reaches more than 6,000 pounds. If the non-sealing performance is particularly good (essentially impossible), the weight of the battery cannot be saved. In fact, it is more important to consider the motor and battery after flooding. It still doesn't work. It seems that Tesla should have a good seal on the key components, probably for a while, to handle most flooded roads. It should be more durable than diesel locomotives."

Lithium battery water damage is not covered by the warranty

"On March 14, 2014, I opened the ModelS85. I followed the opening of the general car and tried to push the water through the tires and pass it quickly.

"The result is that the water is deeper than I thought. The car drifted for a while, then the tire touched the ground. I just drove it over, and then the panel warned that the vehicle needs maintenance and may not be able to restart. In the ten minutes of driving home, warning Sometimes it wasn't. I called the after-sales service and replied that the battery pack might be hanging (although my panel showed 110 miles of cruising range). Then they gave me a spare 60 car.

"Then I got a call and said that because the water had passed over the battery, the top seal detected water soaking, and then I got an error. They said they had to dry for 24 hours, and if they couldn't, they would have to replace the battery and the connector.

"Lesson: If you have an air suspension, please adjust to the highest, and then judge the water depth according to the other vehicles without water. Do not over the top.

"I also want to tell people who want to disparaging Tesla: I still have a good car, and the manufacturer service is also in place."

Then someone posted a warranty statement (North America):

The terms clearly state that the lithium battery is not covered by the warranty. In other words, if the insurance company does not pay, the owner may need to pay for it.

At present, various insurance companies have not yet launched special insurance for new energy vehicles. There is no specific claim plan for the insurance methods for special components such as batteries and motors.

However, all of this is believed to be resolved soon. It is said that Elon Musk is investing $1 million to develop an underwater car.

"In September, in the icy waters of the South Pacific, tens of thousands of krills gathered together. They are the favorite of humpback whales... a Tesla slowly sweeps across the seabed, going through the annual Long-distance migration."

Far away, according to the known information, I summed up. Because it is electric drive, Tesla is doing a good job in waterproofing, but only in the power section. Although the foreign media has problems such as poor sealing of the car compartment and water leakage in the car wash, but after all, it is a case, and some petrol cars are also seeping water?

So if you drive the Tesla ModelS to the following situation, please drive it to the nearest river as soon as possible, maybe you can leave the whole body.

What is the performance of other electric/hybrid cars?

I interviewed BYD's dealer in Shanghai. A technician named Zhang explained that Qin usually has a wading depth of 0.4 to 0.5 meters (this is similar to most diesel locomotives). The high voltage part of the appliance is about this height, because BYD Qin uses 500V total voltage.

Just kidding, in fact, Qin's total voltage has over current protection. If the lithium battery is internally short-circuited, it will only form a short circuit between the 3.3V single-cell lithium batteries, and will not form a high voltage. Do not worry. Moreover, these problems have been taken into consideration before leaving the factory. It is necessary to note that due to the low position of the lithium battery, once the water penetrates from both sides during the wading process, the possibility of the lithium battery entering the water is not excluded.

At present, the official price of BYD Qin is 18.98~20.98 million Yuan, the subsidy for the hybrid vehicle (the state subsidy 35,000, Shanghai subsidy 30,000), the actual price is as low as 124,800, and can enjoy the free license. BYD Qin, the speed must be extremely fast, the motor and the internal combustion engine at the same time, presumably the best.

Roewe E50

The E50's drive system is at the front of the front, the power battery pack is placed slightly behind the bottom of the car, and the 12V battery is placed at the bottom of the trunk. The E50 uses a lithium iron phosphate battery with a 2000 cycle charge life.

According to the Roewe official website, the E50 has high-voltage electric shock protection, and any high-voltage components provide insulation design against direct contact. The vehicle has reached the IPX7 waterproof rating (about 30 minutes in a meter water depth) to meet the wading needs in actual use.

The current official price of the Roewe E50 is 234,900 Yuan. According to Shanghai’s latest “Provisional Measures for Shanghai to Encourage the Purchase and Use of New Energy Vehicles” issued on May 20th, the Roewe E50 after subsidy is only sold for about 150,000. In addition to this, you can enjoy free Shanghai license plates.

Editor's summary: As an emerging technology, electric vehicles have gradually become accepted from the present. Shanghai, Beijing, Guangzhou, Shenzhen, Xi'an, Wuhan and other places have successively issued clear new energy subsidy standards and infrastructure targets. On May 24 this year, President Jinping Xi said during his inspection in Shanghai that the development of new energy vehicles is the only way for China to move from a big car country to a powerful car country. At present, the development of new energy vehicles in China has begun to gradually move from the policy encouragement phase to the actual operation phase. In the near future, there will be more and more practical problems to be solved, and it will not be just a matter of whether the tram can wade. New energy vehicles, let's see.

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