Coquettish Rebirth

In this Stella company, apart from many engineers optimizing the Tesla electric car, there is also a small group of people working with Ding Haitao and others to make the electric SUV that Jia Hongjian asked them to make.Such an electric suv is almost done now - the chassis was originally the chassis of the Jinbei van shipped by Huaxia Hi-Tech itself, and such a chassis has been transformed into the chassis of an electric suv. The amount of work is somewhat, but not very big.Because the position where the motor is installed now is where the fuel tank was originally located, so generally speaking, the change is not too big.

For such a modification, I didn’t expect Tesla’s engineers to be quite good at it. After some inquiries, I found out that what Tesla’s engineers have been doing for the past two years is to modify the chassis—in fact Tesla and the others made such a prototype car, which used the chassis of a brand like Lotus!And a few years ago, they had selected the chassis of other cars one after another. It can be said that what these automotive engineers have been doing in the past few years is to modify the chassis of various gasoline engine cars and transform them into electric car chassis.The motor I chose this time is the same as the motor of the Tesla electric car, and I also bought the Dawan brand.

That's right, in fact, a company like Tesla is a company with no hardware of its own!When they were in the past, even the factory buildings were rented from other old factories, and the sheet metal parts of the car shell were outsourced to a special factory to make them. The chassis was from Lotus, and the motor was from Dawan Tomita. Then the battery is also Panasonic's 18650.It can be said that in addition to the basics of battery control, they only have integration and optimization technologies for the hardware of the entire car... It sounds like Tesla is not a good company?Sound like a bag company?In fact, many, many companies are like this these days. Even speaking of the awesome Apple in history, how many things in the entire mobile phone and tablet are produced by themselves?

Take the iphone4, which has caused huge repercussions all over the world in history.The most expensive screen is produced by lg.Then the gyroscope is from STMicroelectronics, and although the CPU is purchased by Apple itself and authorized to modify the design, the production and manufacturing are outsourced to Samsung. In addition to providing wifi and bluetooth network chips, broad also replaced Infineon and created a GPS chip for iphone 4.Other chip suppliers include skyeworks, triquint, etc. The touch screen of iphone4 is estimated to be supplied by two different companies.Some come from Wintek Wintek of Dawan, and some come from tpk-balda, a joint venture between Xia Menchenhong and Balda of Germany.

Speaking of this series, how many things are still produced by Apple itself?It can be said that there is no Apple's own hardware except software!And who said that Apple is a bag company?And isn't Tesla similar to Apple, it's just that Tesla didn't have the prestige of Apple before.Although it is said that Tesla does not produce any accessories by itself, it is precisely because of this that Tesla's automotive hardware engineers have really accumulated a lot of "car saving" experience in the past few years.Therefore, in the process of helping to make electric suvs here, they really played a major role. Let's talk about how to change them here.It really took a few days of effort to make corresponding changes over there, and it was especially in place!

Nowadays, such a suv prototype car is basically modified. Of course, the car body is still made of iron sheet. The sheet metal thing does not cost much. Outsourced to let others make a sheet metal car shell, in fact, the price is not expensive. go there.Then the car shell is combined with the chassis, the fuel tank, engine and gearbox are replaced, and the electric motor is replaced.Then put back the interior and so on, such an electric suv prototype is almost done!Such a time.In the entire suv, there are only seats for the driver, and the rear seats are all used to install batteries—after all, this is an experimental prototype, and the chassis is still a temporary modification, not customized by the original factory according to special requirements Yes, then naturally there is no place to put the battery, so it can only be placed inside the car body.

When Jia Hongjian saw such an SUV.To be honest, I still feel a little weird - the car is still much bigger than the usual suv.Ordinary suvs only have 5 seats, and this still includes a driver!As for the chassis obtained by Huaxia Hi-Tech, it turned out to be the chassis of the Jinbei van or Jinbei mpv. Such a car can accommodate up to 9 seats according to the original factory configuration!Except for the driver and co-pilot.There is room for 7 people in the back row!Behind the driver's cab, there are two rows of seats in the front and rear, and the last row is a seat for 3 people. If the driver and co-pilot are added, then there are 9 people?

And such a big car chassis, after changing it to an suv, of course it will be bigger, and it can even be said that it looks like an electric van at a glance!After all, this is a prototype car for a principle experiment, and we can tolerate such a problem with the appearance—could we redesign a new chassis to make it a special chassis for SUVs?At the same time, because of the relatively large size, the battery installed this time is also much more than that of Tesla, so the endurance performance is even slightly higher than that of Tesla electric vehicles-basically reaching about 400 kilometers!If we redo the chassis in the future, the number of batteries will definitely decrease. It is estimated that the battery life will be further optimized by then. After all, the weight of the car will be a lot heavier, and the overall battery life may only be about 300 kilometers.

However, in Jia Hongjian's view, there is no big problem - such an SUV is aimed at the Chinese market, and we Chinese are still a little irrational in choosing a car. We do not regard the car as a means of transportation, but as a major For consumer goods, it is very important to look at the appearance of the car.Many families think that SUVs look grand, but after buying them, they are only used for commuting in the city, and at most occasionally run long distances. Jia Hongjian thinks that consumers should be able to accept them under such a normal use situation. of.After all, if you run a long distance, you can stop for about 3 hours and take a break to go to the toilet or something. It is impossible to run for five or six hours in one breath, right?Besides, as long as Huaxia Hi-Tech's power station replacement is popular enough, even if it takes more than ten minutes to replace the battery, it will be a good rest for the car owner to stop, go to the toilet, drink saliva, eat something and smoke a cigarette. Time!

So the question now is whether the battery can be replaced quickly while maintaining safety!Some people may think that these requirements are contradictory, but they are not contradictory. Who said that it must be difficult to disassemble to ensure safety?Who said that to ensure safety, you must hide the battery in a place that is difficult to disassemble?In history, Tesla added a chassis armor under the chassis in order to prevent foreign objects on the ground from hitting the battery on the chassis, but who said that this cannot be designed to be quickly disassembled?At that time, the huge battery box containing the battery will be made to be combined with the car body through special buckles, and then fixed with quick-release bolts. After the car is raised, it can be easily Quickly remove all the nuts, and then a few people press the buckle under the car, and the battery can be removed.Then change the battery, install the battery in order, and finally put on the armor plate?

Jia Hongjian thought about it for a while. If it is done this way, it will probably take ten to twenty minutes to set up a car, and there are still two or three people waiting for it.It may be no problem for such a car to come and change the battery, but what about queuing?It's not about how long the queue is, but about a car driving over, and then there are two or three cars ahead?In such a situation, each car takes more than ten, twenty, ten minutes, so the accumulative total is not that the third car in the queue has to wait for an hour to be replaced?It's been a long time!Not to mention consumers, even Jia Hongjian couldn't accept it!So what should we do?Could it be that we need to get a special robot or something to lift the car and perform various replacements?This feels very troublesome, because you need a special jack or something to hold the battery...or we can make an opening on the side or behind the tail of the car, fix the armor of the chassis, and then pass through the side or behind the rear of the car opening to extract the battery?

In this way, because the bottom armor does not need to be disassembled, the battery box can be transformed into a drawer-like appearance. The battery is a drawer and can be pulled out. In this way, the whole should be much faster?Then put the socket, the bus and other interfaces on the outside, so that as long as you see the battery, you can manually unplug the cable or something, and then use the automatic machine or semi-automatic machine to take and put the battery. Is it?Of course, since the battery compartment has an opening in this way, the structure of the opening needs to be strengthened. How about adding a piece of armor to cover the opening?Especially if the replacement is done on the side, it avoids the rear bumper issues involved with changing from behind the butt!Of course, a certain degree of structural reinforcement is carried out on the side, and some armor is added to ensure that the side door is deformed and the battery will not be affected. Isn't that all right?Originally, the side of the car is the thinnest. If the car hits the side and the door is deformed, then the passengers in the car will probably be choked up. The battery can still be fine at this time, is it interesting enough?

Of course, there is no need for Jia Hongjian to design the specific structural and design issues. As the boss, he only needs to have a concept in his head, as long as he knows roughly how to judge whether the design of the quick-change battery developed by the following people is good or not. ——Because in two days, Tesla engineers will show Jia Hongjian their quick-change design! (To be continued..)