Chapter 22 Theory 300W, urgent need for battery talents
SEG Technology Park.
Longxing Technology Experimental Base.
Chen Xingzheng took the elevator to the fast charging laboratory on the fourth floor.
Fifteen minutes ago, he originally wanted to go home and sleep. After all, after traveling back and forth for several months, he couldn't bear it anymore.
I never expected it!
As soon as he signed a 120W star flash fast charging technology agreement with Rebus Luo Hao, news of a technological breakthrough came from the laboratory, and the theoretical power reached 200W.
What is this concept?
If 120W can fully charge a 3000 mAh battery in 10 minutes, then 200W Star Flash fast charging may reduce the charging time to less than 7 minutes.
For fast charging technology, under the premise of ensuring safety, naturally the shorter the time, the more satisfied the user will be.
"Ding——"
The elevator door opens.
Chen Xing just walked out of the elevator and met Ding Yaoping, who was about to go back to the employee dormitory to rest. The latter was stunned for half a second, and then he reacted and said: "Has Chief Yang sent a message to the president?"
"Well, he told me that there was a breakthrough in fast charging technology. Is anyone else involved now?"
Chen Xing asked.
Ding Yaoping nodded, turned sideways and said: "I'm still studying the theoretical voltage, let me go in with you."
"Well, I just wanted to take a look. Is there anything you need me to do? "
Chen Xing walked straight inside, while Ding Yaoping followed behind.
Inside the laboratory.
Yang Bochao was concentrating on the lithium-ion battery inside the sealed glass and gradually increasing the current power.
180W!
200W!
205W!
When the current reached 215W, the lithium-ion lithium battery suddenly bulged at a speed visible to the naked eye. It seemed that some violent reaction had occurred inside. With a "bang" sound, the battery hit the glass cover hard. , when it fell back to the countertop, the fire engulfed the entire battery.
Yang Bochao took out his notebook and recorded the experimental data.
Is 215W the limit?
No!
He feels there is still room for improvement, and batteries may be a breakthrough.
While he was thinking about how to go further, Ding Yaoping shouted at the top of his lungs: "Chief, the president is here to check our results."
"President!"
Yang Bochao looked back and saw Chen Xing walking slowly. He put down his record book and greeted him quickly: "Why are you coming so late, CEO? It won't be too late for the inspection tomorrow."
"I just finished the release. Yes, I stopped by when I saw your good news."
Chen Xing smiled and noticed the still burning battery and said, "Is this testing the maximum power?"
< br>"Well, it spontaneously ignited as soon as it reached 215W. The current lithium-ion battery technology seems to be unable to withstand current input above 210W."
Yang Bochao just finished speaking and proposed a new plan: "But I think 210W is not the limit of fast charging, but the limit of current battery technology. If you want to break through this power value, I think we can break through it from the battery aspect.”
Yang Bochao is indeed a purple-quality talent. Although he only has a college degree, Ideas to improve charging power are endless.
Currently, there are only two ways to increase charging power: increasing current and increasing voltage. Both methods have disadvantages, that is, the battery cannot withstand the super current.
Now that the current and voltage have reached their limits, we can only start with the battery.
Chen Xing silently remembered this, and then asked: "How about 200W Star Flash fast charging? Is the safety guaranteed?" He has always attached great importance to the safety of fast charging, such as this 120W Star Flash Fast Charge, the theoretical power of the laboratory had already reached 140W. Due to heat generation and battery instability, Chen Xing took a stab at himself and released 120W Star Flash Fast Charge instead.
"140W can definitely be put on the market, and 200W still needs to be studied."
Yang Bochao replied.
Chen Xing: "Have any changes been made?"
Faced with this question, Yang Bochao patiently answered: "Our Xingflash fast charging is not a dual-circuit charge pump design, I thought Can we add a circuit and a charge pump and divide it into three, so that a stronger current can be input, and after decompression by the charge pump, the three circuits can be combined into one, and finally flow into the dual cells of the battery."
"Facts. Proof. ”
“We succeeded!”
“The design of three circuits and three charge pumps greatly increases the charging power, without considering the battery capacity. 300W charging power is even higher, but it is limited by current battery technology. The current theoretical maximum is 200W. If it exceeds, it may expand and explode. In addition, 200W flash charging has a small flaw.”
Defect?
Chen Xing was confused and asked: "What's the defect?"
He didn't dare to be careless about the battery. If there was a defect, it was best to reduce the charging power.
Yang Bochao smiled knowingly and said frankly: "It is a three-circuit, ultra-high current design. It will be a little hot when charging. Because it is a preset input of 20V10A high current, the battery life may also be affected."
20V10A This is not just a large current, it’s not too much to say that the current is ultra-high!
According to the technical principle of Star Flash fast charging, no matter how much power is input, the final voltage flowing into the dual cells must be 5V or below. This is the safe voltage of lithium-ion batteries, unless there is a breakthrough in battery technology. Otherwise, it’s best not to exceed it!
However, it can be deduced from the 5V voltage that in order to achieve 200W fast charging, the final current reaching the dual battery cells must be 20A. It is strange that such a large current input does not generate heat!
Considering that it is summer, the temperature is already high, and it is even higher in the south. If you use 200W fast charging technology rashly, once the battery temperature is too high, unexpected things may happen. !
Except for the potential safety hazards, it is not a problem that may affect the battery life. When the time comes, the original battery replacement service can be solved.
After much hesitation, Chen Xing still considered safety issues and said: "The idea of three circuits and three charge pumps is very good, but the actual application will be delayed because the internal layout of the mobile phone needs to be redesigned. Your fast charging team will continue to work hard. , I will continue to arrange personnel, especially battery talents.”
“Good president.”
Yang Bochao also knows not to rush.
120W Star Flash fast charging is already very fast. There is no need to rush to 200W. After all, if it really explodes and damages the trust of users, then the gain outweighs the loss.
But what is certain is that as long as battery technology is upgraded, 200W star flash fast charging will naturally be available, and then we will truly enter the era of counting seconds.
“President, I have something to report!”
While Chen Xing and Yang Bochao were chatting about fast charging, a girl with a ponytail wearing a white coat and holding information in her hands walked in quickly.
Chen Xing has no impression of her, she probably is not from the fast charging team.
“View information.”
[Name]: Fang Xiao
[Type]: Scientific research talents
[Qualification]: Lan
[Character]: Social fear (focus on the spiritual world, have more wonderful ideas)
[Main direction]: Mobile phone design
[Loyalty]: 94
[Monthly salary]: 5000 (an appropriate increase in salary can motivate talents)
[Special entries]: None
“It turns out to be a design Team, no wonder I have no impression."
Chen Xing thought to himself.
The places where he comes most often are the chip laboratory and the fast charging laboratory, because the patented technology breakthroughs of these two teams are very rapid.
One helped Chen Xing develop the Kaitian 4G baseband chip, and the other helped Chen Xing develop the 120W Star Flash fast charge.
Other teams, such as the design team and the internal screen material team, had a small number of people and no progress, so he rarely visited them.
Seeing someone come to the door, Chen Xing also asked patiently: "What is the report? Does the design team have any good ideas?"
Fang Xiao took out the information in his arms and handed it to Chen Xing said: "Yes, our design team believes that mobile phones must be segmented. Gaming phones, business phones, and camera phones all require different designs, including redesigning the size, thickness, and screen bangs. This is what our team drew. Please take a look at the draft design. ”
(End of this chapter)