wavenovel Chapter 236 Battery Heating System
Chapter 236 Battery Heating System
"Boss, you've been scammed, haven't you?"
Chen Jianping looked at Shen Fei in shock, and the other two beside him also looked over in disbelief.
"Physical rules don't allow it. To stop at 200 yards, you need at least 35 meters."
To prevent his professional knowledge from being compromised, he looked at Zhang Bin again, and the other person nodded in agreement.
"That guy is definitely bragging, boss. Don't listen to their nonsense. Anyone who claims to be able to stop instantly is either bragging or challenging Newton's theories."
"Then we won't exaggerate." Shen Fei turned the steering wheel, and the car smoothly turned into the bend. "We'll honestly say 36 meters."
Honesty is the best marketing.
Shen Fei nodded silently, after all, his friend often claimed to be very honest.
After the test drive, Shen Fei parked the car in the parking lot, got out, walked around the car, and then squatted down to check the chassis.
"Good workmanship." He stood up and patted Zhang Bin on the shoulder. "You guys did a good job."
A slight smile appeared on Zhang Bin's lips; he had finally lived up to his boss's expectations.
"Boss, there's one more test report we haven't submitted yet." An engineer from the testing department ran over, holding a report in his hand, looking a little hesitant.
"Tell him the boss is technically skilled, so don't worry," Chen Jianping reminded him.
"Back in winter, we went to Northeast China to conduct an extreme cold test. The results were very good, but the effects..."
Shen Fei took the report, initially thinking it was something serious, but after a glance, he immediately calmed down; Wang Mengyang's high-density battery was still fine.
In environments below -40 degrees Celsius, the battery life is reduced by 25%, and the designed battery life is 75% of the nominal battery life.
At -30 degrees Celsius, the battery life decreases by 20%, and the actual battery life is 80% of the nominal battery life.
At -20 degrees Celsius, the battery life decreases by 15%, and the actual battery life is 85% of the nominal battery life.
"75% off." Shen Fei looked at Wang Mengyang. "That's a very good result."
Wang Mengyang's expression, however, was somewhat complicated.
He is the head of the electric vehicle department, and this vehicle battery is the result of his research and development over the past six months. The energy density has been improved from the initial 170Wh/kg through two iterations.
The energy density has reached 210Wh/kg, which is 30% higher than the batteries on the market at the time. The cycle life is 1500 times, and it can be charged to 80% in half an hour with 400V fast charging.
Every indicator was far ahead of schedule, meeting his expectations, except for the decline due to the severe cold.
"Professor Wang, it's a physical rule." Shen Fei patted him on the shoulder. "Lithium batteries experience decreased ion activity and increased internal resistance at low temperatures, and no battery can escape this."
I saw that when Tesla was in Norway, they were offering discounts of 75% to 8% off when the temperature was -20 degrees Celsius. Our results are already quite good.
"I know these are physical rules." Wang Mengyang shook his head slightly. "Boss, users don't care about physical rules."
Users in Northeast China who get a 75% reduction in driving range during winter will complain about us.
Shen Fei thought about it. In other places, -40 degrees Celsius might be rare, -20 degrees Celsius would be more common. But in Northeast China, -40 degrees Celsius is really common. With air conditioning, 5% off in winter is a common sight.
"But don't worry, boss, we'll definitely find a way before we go public," Wang Mengyang assured him.
"I know where the problem lies," Shen Fei said casually.
This surprised the two of them, and they both looked in Shen Fei's direction.
"Once we identify the problem, things become much easier. If we have a clear idea, we can come up with a solution in three days."
"Is three days enough?" Shen Fei asked with a smile.
Wang Mengyang hesitated for a moment, but still smiled and said, "Boss, it depends on the severity of the problem."
"Three days is indeed enough." Shen Fei looked at him and gave him the most mature solution for future generations. "You don't need to change the physical rules. You just need to find a way to make it less uncomfortable for users."
Battery heating and insulation material charging strategy optimization.
You know better than I do, so you go and come up with a solution.
Wang Mengyang nodded, realizing it was so easy.
"Understood. We will definitely come up with a solution within three days."
…………
Three days later, Wang Mengyang and Chen Jianping appeared in Shen Fei's office on time.
Both of them had quite a few dark circles under their eyes, it seems they've been working overtime for the past three days.
"We came up with three plans in total."
He handed over the report.
Shen Fei nodded in satisfaction after reading it; all of his suggestions had been implemented.
Adding a battery heating system, with a heating film added to the bottom of the battery pack, automatically activates when the temperature drops below zero to maintain the battery temperature above 5 degrees Celsius, increases the cost by 2000 yuan.
Battery life can be improved to about 9% of its original value.
Meanwhile, by wrapping the battery with an aerogel heat insulation layer, the battery cooling rate is slowed down when the vehicle is parked. This only increases the cost by about 500 yuan, and the range is also significantly improved.
Add a reservation function to the charging station, so that the battery is heated before charging when the user plugs in the charging gun, thus ensuring charging speed.
The cost will only increase by about 100 yuan, mainly due to software optimization.
Seeing Shen Fei put down the report, Wang Mengyang put down his pen and turned around.
"Boss, the three options can be used in combination. If all three options are used, the battery life can be reduced by more than 9%, but the overall cost will increase by about 2500 yuan."
Shen Fei looked at the confident Wang Mengyang and nodded in satisfaction.
He recalled those early adopters of new energy vehicles in his previous life. Most of the first batch of people who bought electric cars with subsidies suffered losses.
Exaggerated range claims, breakdowns in winter, and slow charging have caused many people to lose confidence in electric vehicles.
Later, Tesla implemented battery heating, NIO implemented battery swapping, and BYD developed the blade battery. Step by step, they regained user confidence.
Transsion's goal is not to compete with other manufacturers on who is coolest, but to set a standard for all electric vehicles.
From now on, all tests must be conducted according to the standards for sound transmission. Anyone who dares to misrepresent the standards will lose their job.
"Let's use all three." Shen Fei stood up. "The first generation of cars must have a good reputation. We'd rather have higher costs and lower profits than let users think that Transsion's cars are no good."
Chen Jianping did a quick calculation, then said somewhat hesitantly.
"Boss, with the cost of 2500 yuan plus the previous BOM, the cost of our single vehicle has exceeded 18 yuan."
If the price is below 30, it's a loss-making sale.
"Who said the price has to be below 30?" Shen Fei laughed. "Our car is worth that price."
He stared at the two of them for a while.
"Although the first batch of cars is not for making money but for building a reputation, we still want to make money from the savings in our supply chain."
Wang Mengyang and Chen Jianping nodded.
Battery packs with a power consumption of around 80 kWh are indeed very expensive, which means that most automakers' pure electric models will not have a range of more than 400 km, which is completely inferior to that of gasoline vehicles.
But Transsion has its own factory, aiming to change the industry by simply increasing battery size and extending battery life, thus building a good reputation.
Of course, we still need to make money from the battery packs, but we'll make less than other competitors. After all, we need to leave some room for other competitors to survive, so they don't all end up cursing us.