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Recently, an ES8 owner posted on the forum that he had encountered "brake failure" when driving an ES8 in the park on a rainy day. According to the owner's description, when he entered the road inside the park on a rainy day to prepare for parking, he found that the brakes could not be stepped on at all. Because of the temporary "brake failure", he had to find a side hit by the wall. At that time, the speed of the car was about 21 yards, and the whole car airbag ejected after hitting the wall. The arm was burned by the airbag. The owner added: "NIO threw pots and pans on the marble roads and garage epoxy floors in the park on a rainy day, and airbag burns were interpreted as a normal phenomenon, and did not forget to emphasize that there was nothing wrong with their vehicles at all."

In response to the accident, NIO promised to give the owner 50,000 points as compensation, but it was opposed by the owner and raised a series of doubts, including how much impact the airbag would trigger. What are the design standards? Why do some pop-ups and others not eject at the same 26-yard speed impact (airbag)? Brake failure in rainy days is normal? What should I do if I encounter a situation like this?

As a matter of fact, we have reported on related events many times. Prior to this, when a Xiaopeng P7 in Ningbo, Zhejiang Province, was turning in the basement, he hit the brakes but did not respond. At last, he rubbed against a pedestrian. The owner questioned that there was a problem with the brakes of the Xiaopeng P7, because the speed had already been shown to be "0" at that time, but the vehicle was still moving.

According to the driving recorder provided by the owner, the floor of the garage was flat and a little wet at that time, and the owner's speed was 18km/h at first. It was suspected that the owner's speed changed to "0" after stepping on the brakes, but the car was still moving forward. In addition, the basement surveillance video shows a Xiaopeng P7 driving forward at the entrance and a girl passing in front of the car, but Xiaopeng P7 seems to show no sign of stopping, still driving forward, and finally rubbing against the girl. Xiaopeng P7 only stopped after crossing the yellow warning line. In this regard, the car owner believes that "Xiaopeng P7 brake failure, background data show that there is no problem with the vehicle, stepped on the brakes for 4 seconds, but these 4 seconds Xiaopeng P7 has no sign of stopping."

Xiaopeng auto-related staff also responded, through surveillance video and background data analysis showed that the vehicle was driving on the waterlogged epoxy floor. The vehicle is still in a state of acceleration before entering the parking area of the underground garage, and then the customer presses the brake pedal to brake. Due to the slippery ground, the ABS (Anti-lock Brake system) is triggered, and the vehicle braking system is not abnormal. According to all the verifiable information of the vehicle at present, it is impossible to draw the conclusion that there are any quality problems in the vehicle, nor can it satisfy the owner's request for further compensation. In addition, Xiaopeng Automobile said that it is willing to cooperate with customers to find qualified third-party testing institutions to test the vehicle brake system, as far as possible to meet the reasonable demands of customers.

Judging from the comments, most netizens think that the car owner is operating improperly. Some netizens said, "our company is also an epoxy floor, and we have hit almost four cars", "the epoxy floor plus rain, nothing works", "I have also tried to skid in the parking lot paving the epoxy floor on rainy days, especially when crossing the 90 °bend, it is very easy to make the front tire lose grip", "the epoxy floor is 21 yards open on rainy days, and the brakes can't stop" and "this kind of light epoxy plus water is equal to ice surface." The heavier the car, the harder it is to stop. However, some netizens think that "it is a bit too fierce for the airbag to pop up directly at this speed."

The epoxy floor is mainly composed of an organic material called "epoxy resin". The stagnant water falls on the epoxy floor as if the water is poured on the oil, forming a water film, which greatly reduces friction, which is also the reason for the frequent accidents on the epoxy road surface with stagnant water. So is it "brake failure"? We have no way to prove it, but there are many accidents caused by the slippery road surface of the epoxy floor. both oil cars and trams should drive at a low speed in this case. Generally speaking, when driving in the waterlogged epoxy floor vault, the speed must be controlled below 5 mph in order to ensure sufficient braking distance and avoid accidents.

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