There are wireless charging devices in the market all the time, but they only replace the wireless charger, and are not convenient to use on the desktop. Apple iPhone 12 series mobile phones have added magnetic absorption wireless charging function inside the mobile phone. The wireless charger and mobile phone can be automatically positioned through magnetic absorption, which greatly improves the ease of use of wireless charging and makes wireless charging widely used.
The charging head network has obtained a magnetic absorption wireless charging bag launched by Bess, which can be adsorbed on the back of the mobile phone for wireless charging. It also has USB-A and USB-C interfaces, supports 20W PD fast charging, and supports percentage power display. The function is very practical. Let's take a look at the internal solution of the disassembly of this magnetic absorption wireless charging bank.
Bess digital display wireless charging mobile power supply unpacking
Baseus brand, product appearance and name are printed on the front of the box.
Product application scenarios, parameters and brand information are printed on the back.
The package contains mobile power supply, data cable, cartoon sticker, warranty card and operation instructions.
The attached data cable is a short A to C cable, which is portable.
The mobile power supply of Bess is made of PC fireproof plastic shell, with its surface frosted and fingerprint resistant, and its overall flat, compact and delicate.
There is a bright decorative panel above the front of the fuselage, and a hidden digital display screen is built in the area, which can accurately display the remaining power of the mobile power supply in real time. There is a prompt sign for wireless charging area in the middle, and the words 20W below indicate that the product not only supports wireless charging, but also supports 20W wired fast charging.
Baseus brand is designed under the back of the fuselage.
The top of mobile power supply body is equipped with 1A1C interface and indicator light, which is white.
The side is equipped with a power key.
Mobile power parameters are printed on the other side.
Close-up of product parameters
Model: PPCXW10
Battery capacity: 1000mAh 3.7V 37Wh
Rated capacity: 5800mAh (5V3A)
Battery type: polymer lithium battery
Energy conversion rate: ≥ 75%
USB-C input: 5V3A, 9V2A
USB-C output: 5V3A, 9V2.22A, 12V1.5A
USB output: 5V3A, 9V2A, 12V1.5A
USB+USB-C output: 5V3A
Wireless charging output: 15W
Total output: 5V3A
Shenzhen Shishang Chuangzhan Technology Co., Ltd
Producer: Shenzhen Haosimei Technology Co., Ltd
Mobile power has passed CE and FCC certification.
The measured length of mobile power supply body is 146.11 mm.
The width is 71.18 mm.
The thickness is 17.48mm.
The size of the mobile power supply is intuitive.
In addition, its weight is about 230g.
The area where the bright decorative panel of the mobile power supply is located is concave, so it can avoid being hit by the camera module when charging the Apple iPhone wirelessly. It is more natural to hold it. It is commendable to take this detail into consideration when designing.
In addition, the product's adsorption is also very awesome, which can hold the iPhone 13 Pro Max in the air.
Conduct wireless charging test, which can charge Apple iPhone 13 Pro Max wirelessly.
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It also has three sets of fixed voltages, 5V2A, 9V2.2A and 12V1.5A, and two sets of PPS voltage ranges, 5-5.9V3A and 5-11V2A.
In addition, the USB-A port supports QC2.0/3.0, AFC, FCP and PE2.0 fast charging protocols.
Disassembly of wireless charging mobile power supply of Beisi digital display
After having a basic understanding of the appearance, size, adsorption and performance of Beisi's magnetic absorption wireless charging device, let's continue to disassemble it to see how the actual material and workmanship of the product are.
Pry off the shell along the shell seam, and fix the internal battery on the cover plate with double-sided adhesive.
In the internal view of mobile power supply, the top is the PCBA module, and the bottom is the battery pack. The upper and lower parts of the battery pack use red tape for insulation and protection.
PCBA module list, connecting battery and thermistor through wire welding.
The PCBA module is fixed inside the housing by screws.
Turn over the battery. Below the battery is the wireless charging coil and the magnet used to absorb the mobile phone.
The back of the coil is pasted with foam buffer.
Below the foam is the wireless charging coil and the magnet that absorbs the mobile phone.
The front of PCBA module is welded with wireless charging coil.
Below the wireless charging coil is a thermistor for detecting temperature rise.
The built-in battery of mobile power supply is from SAIL sail, with capacity of 10000mAh, thickness of 11mm, width of 60mm, length of 100mm, equalizing voltage of 3.7V, 37Wh.
The positive and negative electrodes of the battery are connected by welding wires.
A thermistor is also pasted on the battery to detect the battery temperature.
Glue fixed magnets are used inside the shell to adsorb mobile phones and positioning functions respectively.
At the front of the PCBA module, the boost inductor and main control chip are welded at the left side, a 188 LED digital tube is welded at the middle position, the CBB resonant capacitor is welded at the right side, and three parallel battery protection chips are welded at the lower right corner.
A wireless charging master and integration success rate level chip are welded on the back, and the position of the corresponding master chip is exposed to copper through the hole for heat dissipation.
The main control chip of the mobile power supply adopts the Smart Rong SW6201. This is a highly integrated multi-protocol two-way fast charging mobile power supply dedicated multi-in-one chip, which supports fast charging at any port of A+A+B+C. It integrates 5A high-efficiency switch charging, 18W high-efficiency synchronous boost output, supports PPS, PD, QC, AFC, FCP, SCP, PE, SFCP and other fast charging protocols, power metering, nixie tube/LED light display and corresponding control and management logic. Only a few peripheral devices are needed to form a complete high-performance two-way fast charging mobile power supply solution.
Details of Zhirong SW6201.
two point two μ Both sides of the H alloy inductor are glued for reinforcement.
The wireless charging master is a MCU without screen printing.
The full-bridge chip of the wireless charging power level comes from Nanxin Technology, model SC5004, which is a highly integrated analog front-end of the wireless power transmitter. It contains all the analog components required to achieve WPC-compatible wireless charger. It integrates the full-bridge power driver MOSFETs, current detection amplifier, bootstrap circuit, communication demodulator and protection circuit, supports 12V input voltage and 15W wireless charging.
Detailed specifications of Nanxin SC5004.
The resonant capacitor is from Koya, which is a special capacitor for ZZEC series wireless charging, with the specification of 0.4 μ F 100V。
The wireless charging coil is wound with Leeds wire to reduce the thickness.
188 segment code LED close-up for power indication.
Close-up of LED working indicator.
Three core micro-XB7608 battery protection chips are connected in parallel for overvoltage, undervoltage and overcurrent protection of the internal battery of mobile power supply.
Electric quantity detection key patch welding.
USB-C mother base adopts orange rubber core and is fixed by through-hole welding.
USB-A base plate is welded and fixed with sink plate to reduce the thickness.
After the disassembly, take a family photo.
Summary of disassembly of charging head network
The magnetic absorption wireless charging mobile power supply launched by Bess has a built-in 10000mAh battery, which is compact and can be adsorbed on the back of the mobile phone for wireless charging. At the same time, the mobile power supply has 20W charging and discharging power, and also supports PPS fast charging. It also supports the wired fast charging of Apple and Android phones. The percentage power display can more accurately understand the remaining power.
The charging head network learned from the disassembly that Beisi's magnetic absorption wireless charging mobile power supply has a 10000mAh lithium battery built in, uses the Smart Rong SW6201 main control chip for voltage rise and fall conversion, as well as USB-C interface charging and output. The wireless charging adopts a non-standard MCU chip and the SC5004 chip of Nanxin Technology. Both the battery and the wireless charging coil are equipped with thermistors to detect the temperature rise. The highly integrated scheme design greatly simplifies the design of the magnetic absorption wireless charging mobile power supply.
