What problems may new energy vehicles cause when passing through water?

wangerxian

What problems may new energy vehicles cause when passing through water? [Copy link]

 

The roads were flooded after heavy rains in the past two days. I had no choice but to walk on several sections of river-like roads yesterday. I saw many cars broken down and waiting for rescue along the way.

As long as the engine air intake is not flooded, there is basically no problem for gasoline vehicles. What problems may occur when new energy vehicles are flooded? I think the battery is waterproof and should be fine if it is flooded for a short time. The second is the high-voltage circuit. I remember seeing someone dismantling some new energy vehicles. The high-voltage circuit is not protected and is exposed. People generally cannot touch it, but if the water is too deep, it feels like the water may contact the high-voltage circuit. Do you think there are other problems that new energy vehicles may cause when they are flooded?

秦天qintian0303

These circuits should have a certain waterproof level. The main thing is that the car was flooded this time. How much compensation will the insurance company have to pay?

qwqwqw2088

The waterproof standard reaches IP67, requiring a wading height of 70mm

wangerxian

Qintianqintian0303 posted on 2023-8-2 10:03 These circuits should have a certain waterproof level. The main thing is that the car was flooded this time. How much compensation will the insurance company have to pay?

Circuits too? And those plugs too? I thought only the batteries had them.

wangerxian

qwqwqw2088 posted on 2023-8-2 10:25 The waterproof standard reaches IP67, requiring a wading height of 70mm

70mm? That won’t even reach the chassis.

qwqwqw2088

wangerxian posted on 2023-8-2 10:33 70mm? That won’t even reach the chassis.

The standard does not specify the wading height.

This is the wading height that most new energy sources can reach, and some are even higher.

秦天qintian0303

wangerxian posted on 2023-8-2 10:33 Are there circuits too? Are there plugs too? I thought only batteries have them.

Waterproof plugs are now common

eew_AG2DvH

If it is not sealed, it is definitely a short circuit, but this is a very basic problem and is unlikely to occur. And even if it is short-circuited, it is unlikely that the battery cell will short-circuit. In this case, the overcurrent protection of the battery management can still work normally and automatically cut off the circuit. In short, at most a few components will burn out, and it is unlikely that the battery cell will catch fire.

吾妻思萌

These circuits should have a certain level of waterproofness. The main thing is, how much compensation will the insurance company have to pay for the car being flooded this time?

It won't be much, so just increase the premium next year. The insurance pays for itself.

吾妻思萌

The car's electrical system has been tested in a puddle on a rainy day at the seaside. It works fine for a short time, but it's a mess for a long time.

秦天qintian0303

Azuma Simeng posted on 2023-8-3 10:32 The compensation is not much, the premium will be increased next year, the insurance wool comes from the sheep.

In the face of natural disasters, everyone is weak.

wangerxian

Azuma Simeng posted on 2023-8-3 10:36 The onboard electrical system has been tested in puddles at the seaside on rainy days. It is OK for a short time, but it is a mess for a long time

It seems to only take half an hour. Any longer and problems will start to occur.

吾妻思萌

Azuma Simeng posted on 2023-8-3 10:36 The onboard electrical system has been tested in the puddle on the seaside on rainy days. It is OK for a short time, but it is a mess for a long time

It seems to be only half an hour. If it is longer, problems will start to occur.

Look at the watertightness. Some cars seem to be 2 hours

damiaa

Waterproofing the circuit should not be a problem. I guess there are waterproofing measures. Especially in recent years, floods have hit big cities (I used to only hear about big floods in big rivers in rural areas, but now everyone has moved to cities. As a result, when floods in cities are big, it feels like cities are digging pipes every day, and the water can't be drained out when it comes). I guess there will be amphibious vehicles in a few years. Looking forward to it.

wangerxian

damiaa posted on 2023-8-4 10:40 Circuit waterproofing should not be a problem. I guess there are waterproofing measures. Especially in recent years, floods have hit big cities (I used to only hear about floods in big rivers in rural areas, ...

I don't think an amphibious vehicle will be released. It's possible if the sea level rises a lot in a few hundred years, but by then the car will probably be able to fly into the sky, haha.

吾妻思萌

Hey, I saw the flood situation in Hebei and other places yesterday, it was horrible. I'm afraid we will need new energy vehicles that can be used as both vehicles and ships in the future.

langtuodianzi

Once water enters the battery pack, it may corrode the internal structural components and connectors of the battery system, causing the insulation performance to deteriorate and may even cause the battery to short circuit and catch fire.

wangerxian

Azuma Simeng posted on 2023-8-4 12:48 Hey, I saw the flood situation in Hebei and other places yesterday. It was too horrible. I'm afraid that we will need new energy vehicles that can be used for both cars and ships in the future

Yes, the water depth was more than several meters, which was unexpected. But now the water is flowing downstream, and the pressure is on Tianjin.

wangerxian

langtuodianzi posted on 2023-8-4 13:38 When water enters the battery pack, it may corrode the internal structural parts and connectors of the battery system, resulting in reduced insulation performance and even possible battery short circuit and fire.

Once water gets into the battery pack, it is basically useless and there are safety risks.

吾妻思萌

langtuodianzi posted on 2023-8-4 13:38 After the battery pack is flooded, it may corrode the internal structural parts and connectors of the battery system, resulting in reduced insulation performance and even possible battery short circuit and fire.

Once the battery pack is flooded, it is basically useless and there are safety hazards.

The battery module seems to have IP7 waterproof and 5m water pressure, so there is no problem