In the open space of the Xinyuan plant, an engineering test prototype is being towed onto a trailer and ready to be transported to Shancheng.

The first set of intelligent vehicle battery management system has been officially produced, four sets have been produced and one prototype car has been modified, which will be sent to the Southern Automobile Base in Shancheng for more detailed testing and running-in.

"The battery we chose for the first generation of BMS is 18650 battery, which comes from a domestic manufacturer, and a set of battery panels uses 12 battery packs, each battery pack has 600 pieces of 18650 lithium batteries.

The 18650 battery wasn't chosen because it was excellent, although it was a bit of a mistake. The performance of ternary lithium batteries, lithium iron phosphate batteries and 18650 lithium batteries on the market is not much different, but the 18650 batteries have been promoted for many years, the technical standards are very mature, and the parameters of a large number of monomers are almost identical, and the bargaining power of many manufacturers is very large, and the risks and costs are relatively easy to control. ”

Listening to the engineer introduce the parameters of the first-generation BMS, Lin Ju raised his own questions:

"But after all, there are more than 7,000 batteries, and the performance gap between them should be quite small, right?"

"Boss, you have to know that the industry has this to say about the 18650 battery: if the two 18650 batteries test and find that the parameters are different, it must be that the test machine is broken, and it is very mature. On the contrary, ternary lithium batteries and lithium iron phosphate batteries have slight advantages, but in fact, the quality control is not stable. ”

Lin Ju didn't say anything more, he chose to trust the judgment of professionals.

X-BMS1.0 is the "world's first mature and efficient battery management system" by system engineers, which can intelligently maintain battery life through self-designed circuit control.

The system can flexibly allocate capacity according to 7200 small batteries independently, saving the limited charging times of lithium batteries as much as possible, so as to achieve the purpose of prolonging the life and maintaining the performance as much as possible.

At the same time, the battery pack can be arranged in different regions, the cell temperature can be controlled, and the built-in liquid cooling structure can be used for heat dissipation.

Although the chips used are all from mature design solutions in the market, the design and software are definitely far ahead, and the application of ternary multi-channel parallel processing reduces the amount of computing and reduces the cost.

The most expensive part is a high-performance graphics processor from Nvidia, but system engineers believe it could be replaced with a ternary chip in the future.

Relying on the ternary chip and the corresponding software system, it is expected that the process of the ternary chip only needs 40nm at the minimum, and now it can be mass-produced in China.

As for the motor used, it is a permanent magnet synchronous motor from Southern Motor, and two to four units will be installed on one vehicle in the future.

There are three main types of models that Xin'an plans for the future: taxis with reduced cost and battery specifications, online car-hailing exclusive and construction site muck trucks, and luxury models priced at 300,000 to 500,000 yuan.

The former, to put it bluntly, is to make a chassis, find a way to reduce operating costs to gain advantages, and the production speed is very fast; The latter is meticulous work, which needs to cooperate with the slow development progress of the intelligent driving system, and must wait for the completion of the B-level base to cooperate with the ternary chip to gain an advantage.

Why did the intelligent driving system develop rapidly after the chrysanthemum factory entered the tram in the later generations? It's because of its own software and hardware foundation, without which intelligent driving can't be done.

So it's still a long-term project......

……

On April 22, the State Satellite Launch Center.

A Long March-6 multiplexed white rocket with CZ-6R brushed on top of the launch station, white smoke surrounding it, drifting into the clear blue sky.

In addition to the first stage, the second and third stages and the fairing are all counterweights, of course, the main test purpose of the CZ-6R is only the core stage, and the upper stage is very easy to handle.

The Zhai version of the K120V, YF100K, has been installed at the bottom of the CZ-R, and it is surrounded by retractable support legs that are exactly the same as the Xinyuan No. 1 modification.

At the beginning, the superior leaders said angrily that "simply copy Xinyuan No. 1 C" was turned into a reality by the Eighth Academy, except that the upper level is slightly different, and the core level and Xinyuan No. 1 modification cannot be said to be exactly the same, and they can be regarded as déjà vu.

"Director Tang, your YF100K has improved a lot, directly from the oxygen-rich graded combustion cycle to the full flow? K120's technology is not bought in vain! ”

"Each other, the Long March 6 R and Xinyuan 1 C designed by Mr. He seem to have changed their coatings, and I hope that the recycling will also be a success."

Tang Weitian and He Ruo each took the men and horses of the Sixth and Eighth Academies and hid in the launch control room.

Although they are not giving in to each other, everyone is actually very nervous.

It's so fucking fast, and my heart is not steady!

The YF100K was developed in less than five months, and the CZ-6R was launched in a hurry and produced quickly, five months earlier than the original first flight of the Long March 6 in September this year.

Huaguo Aerospace has always paid attention to stability, which is completely against the decision of the grandfather.

But the arrow has to be sent, last year with the leader of the military order, the Long March 6 multiplex configuration and Xinyuan 1 change exactly the same, the engine is the same source, this has to be this year can not be done, then don't do aerospace, go to Baotou to build a tractor.

“…… 5, 4, 3, 2, 1 ignition. ”

"Ignition"

The YF100K spewed out the same flame as its brother K120V, and staged the same scene as it did in November last year in front of the Binju Satellite Launch Center, taking off smoothly with the CZ-6R.

The real old astronauts in the team breathed a sigh of relief, for them, the rocket that was built in such a hurry did not explode on the spot was a victory.

"Primary shutdown, secondary separation"

At this time, the CZ-6R officially entered the recovery procedure, and the grille rudder at the top of the core first stage swayed to adjust the rocket attitude.

At this time, the ground is still very confident, because the controllable grille rudder is not a new technology, and it has often been used to control the landing area of rocket wreckage in the past, which everyone is still confident in.

The height of the rocket dropped little by little, and finally it could be seen hovering over the Bingzhou Satellite Launch Center with the naked eye.

"Lao He, don't blow up my launch site with your rocket, we will all die honorably if it falls into our building."

"No, I can't deviate!"

The rocket descends to a predetermined altitude, and the ground gives the YF100K a start-up command.

There was no accident, after the fuel was pumped into the combustion chamber, the engine output thrust at 25% power, and Tang Weitian breathed a sigh of relief.

That's all the tasks of the Sixth Academy, as long as the engine doesn't blow up, nothing will be blamed on the Sixth Academy.

The core first-stage rocket continued to slow down, and at the same time adjusted its bearing, a little bit coincided with the crosshair in the infrared camera, and the tail nozzle continued to swing, falling to a height of less than 100 meters above the ground at a speed of several meters per second.

Everything seems to be no different from the core level of the Xinyuan No. 1 modification, even the recycled appearance is the same...... That's it.

The control room suddenly remembered the calm voice of the announcer:

"01B Altitude Sensor Signal Offline"

01B Height Sensor? Wait, that's ......

The flame in the tail of the CZ-6R decreased sharply at twenty meters above the ground, and it switched to working in high-altitude mode, and the rocket, which suddenly lost most of its thrust, immediately lost its attitude and fell diagonally to the grass outside the launch site.

The control room saw a cloud of explosions wrapped in smoke rising from the ground.

The prepared fire brigade rushed up and rushed to the crash area.

The Long March 6 multiplexed Yao-1 mission lost control during the recovery phase due to an abnormal altitude sensor, and the engine output thrust plummeted, crashing on a lawn 600 meters away from the recovery site.