Chapter 274: Happy engineering dog!

The materials used in voltaic batteries are: silver flakes, zinc flakes, salt and absorbent paper. As long as they are simply piled together, it is a battery that can generate electricity!
So did these materials exist in ancient times? If the era you want to travel through is the Ming Dynasty, congratulations, you have all these things! You can charge your phone directly. Because metal zinc was first invented by the Chinese in the Ming Dynasty, it was called "Japanese lead" at that time, and it seemed to be first extracted from silver mines imported from Japan.
But unfortunately, Li Zexuan traveled to the Tang Dynasty, so he lacked one material: zinc flakes.
But can voltaic batteries be made without zinc? Of course not, as long as it is made of two different metals, the difference is the magnitude of the voltage and current generated. The cathode material used in modern dry batteries is copper, and the anode material is zinc.
Copper was also easy to obtain in ancient times. The anode material can be aluminum or iron...Yes, it is iron that is cheaper than copper!
In the room, ah, no, it should be in the "laboratory". Li Zexuan secretly rejoiced in his past life that he had questions about it because of seeing it in his previous life, and Baidu had a large number of relevant materials for manufacturing batteries. Otherwise, he really can't think of making a voltaic battery now, and he will definitely start a generator without fear.
Is this special lady's luck?
Because in the Tang Dynasty without any industrial and electronic foundation, it would be really difficult to build a generator based on the theoretical knowledge learned from textbooks. Li Zexuan does not plan to build a generator at present. There are too many technical problems to solve, so let's do it later.
Li Zexuan took a special cuboid pottery pot. There are fifty independent compartments inside the pottery pot. Because the voltage and current of a voltaic battery are definitely not enough, it needs to be connected in parallel to increase the current, and then in series to increase the voltage.
The most crude and rudimentary voltaic battery has a voltage of about one volt, and its current generally ranges from ten to twenty milliamperes. If the voltage of the voltaic battery in each compartment is one volt and the current is ten milliamps, then fifty voltaic batteries in parallel are counted as one battery pack, and five such voltaic battery packs are connected in series. Together, you can get a power supply with a voltage of five volts and a current of 500 milliamperes, and then the charging problem of your mobile phone can be solved.
Of course, Li Zexuan is a soul wearer. When he crossed over, he brought nothing. The purpose of making the battery was definitely not to charge the mobile phone. He was to power communication tools.
He often feels that he is not wearing it, and he can’t bring a computer. It’s okay to bring a mobile phone. It’s also great to play stand-alone landlords or cut fruits.
However, soul wear also has the benefits of soul wear. At least there is no obstacle in communicating with people in the Tang Dynasty, because the Mandarin of the Tang Dynasty is not Mandarin at all, with a very strong accent. If it were not for soul wear, you would never understand others. What are you talking about.
Li Zexuan prepared a small basin of concentrated salt water, and then poured the concentrated salt water into each compartment one by one. After the fifty compartments were full, the iron pieces he had bent in advance were inserted into the two ends. Two adjacent compartments, and then insert the previously bent copper sheet on the other side.
The copper sheet is the positive electrode of each voltaic battery, and the iron sheet is the negative electrode. In this way, the iron sheet and the copper sheet are intersected into the compartment, which is equivalent to connecting all the positive electrodes and the negative electrodes together. As a whole, Fifty small batteries are connected in parallel to form a battery pack with a voltage of about one volt and a current of about 500 milliamperes.
After completing the first battery pack, Li Zexuan took the copper wire, which was painted on the surface. He used the copper wire to draw out the positive and negative electrodes of the battery pack. Then he took the rectangular clay pot and used it. Cover it with a cover that matches it, and just such a simple battery is made, and it is very convenient to use, just connect the positive and negative poles directly to the circuit. If the voltage is not enough, make a few more such batteries and connect them in series.
"Master, have dinner!"
At this moment, Xiao Xi knocked on the door and shouted.
The little maid took advantage of Li Zexuan's experiment, and asked Sambo to drive her back to the Li Mansion for dinner in a carriage. After all, the food outside was definitely not as good as Li's food. In order to make Li Zexuan's life comfortable, Xiao Xi also tried his best.
"Well, good, I'll come out right away!"
Li Zexuan heard this, and his heart was full of happiness. Compared with his previous life, he is now doing the same job, but the situation is completely different.
In his previous life, he graduated for three years. He basically spent his time in the laboratory. He entered the laboratory to check in at 8:30 in the morning, and usually came out of the laboratory at about 10 in the evening. Of course, he had to check in again. People have to check attendance every month.
Sometimes, in order to keep up with the project progress, it is not uncommon to work overtime in the laboratory until one or two or even overnight. To be better, he is struggling in the front line of scientific research ~EbookFREE.me~ To be ugly, he is a hard worker, engineering department dog!
And now, although he is doing scientific research, there is a pretty little maid beside him taking care of food and daily life. There is also a "driver" on call at any time. This welfare, this treatment, this enjoyment, Li Zexuan said, so happy Engineering dog, he is willing to be a whole life!
"Yeah, it smells so good, what did Aunt Zhao make delicious tonight?"
Li Zexuan went out of the room and came to the main hall, only to notice that the sky outside was almost completely dark. He sniffed with his nose, and immediately smelled a scent of vegetables, so he hurried to the table and picked up his chopsticks. Ready to eat.
"Hey, master, you haven't cleaned your hands yet!"
Seeing this, Xiao Xi quickly grabbed Li Zexuan and said.
"Uh.... Right!"
Li Zexuan looked at his dirty hands and felt a bit of cold. After the experiment, he didn’t wash his hands and eat directly, but it’s a taboo. What he did today is just an ordinary experiment, but if some toxic substances are used in the experiment in the future, he won’t wash his hands. Just miserable?
Thinking of this, he quickly followed Xiao Xi to wash his hands before returning to the table to eat.
"Xiao Xi, have you eaten?"
"Master, of course you will eat Xiao Xi after you finish it!"
"Well, it's annoying, sit down and eat together, you know I hate these rules the most, Master!"
Xiao Xi glanced at Li Zexuan embarrassedly, and finally went to serve herself a bowl of rice, and sat opposite Li Zexuan. It was not the first time anyway. A few months ago, she and Xiaohe were in the Zuixianlou with Li Zexuan. I have eaten at the table.
"Come on, eat a lion head and have more meat!"
Xiao Xi: "............Thank you Master!"
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