I am very happy to participate in the dismantling activities held by the EEWorld Forum and get the selected place for this charging treasure disassembly, I received the Xiaomi Mi 22.5 fast charging treasure. Let's disassemble and look at the internal structure together. There is also a Xiaomi charging treasure 3 in the hand, disassemble and compare the electronic components inside, and so on.
Appearance section
When it was time to open the box, my first reaction was the same as when I first bought the Xiaomi charging treasure. At that time, I bought 10400 mAh, and yes, a Xiaomi charging treasure was 18650 battery four. I remember that at that time, the price of the rush sale was 69 yuan, as if it was 13 years. Now the charging treasure has improved so much, and now it has achieved such a thin and large capacity.
On the back of the box are some parameters detailed by the manufacturer as well as the output input parameters.
When you open it, you will see the data cable directly. The difference with the Xiaomi Charging Treasure II is that he carries a pull-out box. The charging treasure can be drawn directly.
Take out the charging treasure.
Open the family portrait later to take a photo.
Compare the Xiaomi Charging Treasure 2 in addition to the packaging size is a little larger. The size of the charging treasure has not changed, and the appearance and size are exactly the same.
Disassembly section
Start by heating the bottom label with an air gun. Then slowly pick up the label. Two screws are exposed directly.
After removing the two screws, the battery and small board inside the charging treasure directly exited
It feels like this dismantling doesn't require any tricks at all. The overall disassembly difficulty can be said to be very low, after the two screws are removed, push forward to push themselves out.
Pull out the battery section to see the two USB-a connectors as well as the USB-c interfaces. There is also a 10,000 mAh battery. Above the cell are two strips of foam. There is also foam on the left side, as well as a silicone grease pad for thermal conductivity, and its corresponding element is an inductor used for buck-boost.
There is a chip in the lower right of the PCB to see that it is a buck-boost control IC.
SC8934 from NIC.
The left position is the buck-boost control IC with the alloy inductor,
There is a Vail protective tube under Port A.
The brand of the battery comes from Lishen, a single 10,000 mAh, the average voltage is 3.7V, a battery 37Wh, and the right side of the battery is a thermistor for monitoring temperature. The connection between the battery and the motherboard is nickel strip spot welding.
Removing the battery is only one shell left, and the battery is glued to the shell with double-sided adhesive.
The back of the battery cell is relatively neat
There are still three Vail protective tubes on the back of the charging board, which are used as the relevant switching protection of the C port or the A port, and there is a silk screen print on the right side of the protection tube as EUE, which is a TVS transient voltage suppression diode, and a SOSJ under the A port is a lithium battery protection IC.
The silk screen printing 94b458 in the lower left corner should be a modern microcontroller, which is a chip customized by Zimi to Hyundai for the control of the entire mobile power supply.
4 leds are used for the charge and discharge display of the mobile power supply.
This is an electrical board for disassembling the Xiaomi Power Pack 2, in contrast, the Mi 3 power supply has an additional Micro interface and a solid capacitor.
Two electric plates, put together to compare.
The battery size is 10,000 mAh, the fast-charging version has an additional silicone grease pad that is conspicuous, and the ordinary version has an additional solid state, as well as a charging interface.
The bottom of the two sides is disassembled, and the material of the fast-charging version feels much better than the ordinary.
Charging part
To charge, I use the original data cable for Samsung phones.
Charger, I chose a 65w Gallium Nitride charger. The USB port is used to charge the charging treasure. Output and input power, there is no ammeter for the time being, there is no way to detect the current, plug in the charge when you leave work, and see the full after work in the morning.
The four LEDs are all lit when fully charged.
Give me Samsung Note10+ charging, showing a fast charge, Samsung's data cable seems to be different from Huawei Xiaomi, the same IST USB-C data cable. To charge Huawei is a fast charging data cable, but plugged in Samsung's mobile phone, it is displayed to be charging, not fast charging, the specific data cable has not been disassembled to view, as if the protocol is different, can charge Samsung, indicating that this 22.5W supports Samsung charging protocol.
The above is the disassembly process and use process of the entire charging treasure.
summary
Xiaomi this charging treasure, although the price is relatively low compared to other charging treasures, but the charging output efficiency is not low at all, the material is also very powerful, are big brands, charging protection is also there, all kinds of protection tubes, battery capacity of 10,000 mAh, daily use is enough, those more than 150 charging treasures, if they are 10,000 mAh, then I will still choose Xiaomi's this, after all, the most cost-effective, of course, if not bad money, choose large capacity and high power can also be.
Suddenly there was an idea, I wanted to move the temperature protection inside to the middle, and then buy a wireless charging module online and dig a hole in the aluminum alloy shell. Put into the wireless charging module, put the temperature protection in the center of the module, you can detect the charging temperature above, the battery temperature below, what do you think of this idea, welcome to leave a comment.