Preface
The charging head network got a 15000mAh mobile power bank from the Gendome brand, an overseas portable energy storage product of Gotion Hi-Tech, which is sturdy and durable. There are slots on the side of the housing to support cable storage, which is more integral.
The power bank has two USB-C ports and one USB-A port, and supports 18W fast charging input and 20W fast charging output. The end face is also equipped with a wireless charging function, which supports wireless charging for the Apple Watch. Let's bring a dismantling of Gendome's mobile power bank and take a look at the internal solutions and materials.
Gendome 15000mAh power bank appearance
The main body of the Gendome 15000mAh power bank is made of aluminum alloy shell, and the surface is sprayed with silver-gray metallic paint.
There is a power button and a power indicator on the left side of the front of the fuselage, and the right side is a Gendome brand.
Close-up of the Gendome brand.
The battery indicator lights up a light blue light, and each of the four indicators represents 25% of the battery, which can be roughly the remaining power according to the number of lights.
The back of the fuselage is designed with a cable management slot, and there is a USB-C3 port in the slot. At the same time, the product is also equipped with USB-C to USB-C data cable and USB-C to Lightning cable, which are suitable for cable management slot, which is easy to carry and use.
By loading the cables into the cable management duct at a glance, users can flexibly choose the cables they need to carry according to the situation.
Both wires are the same length, both are 12cm.
The ChargerLAB POWER-Z MF001 was used to determine that the Lightning wire terminals were not original.
One end of the fuselage is equipped with a wireless charging function, and the wireless charging area is concave design, which can be used for wireless charging for Apple Watch and other devices.
The other end is equipped with 1A1C dual USB interface, and the shell is printed with detailed product parameters.
Close-up of power bank parameters
Model: Micro30
容量:15000mAh(3.2V/48U LFP)
Input: 5V3A, 9V2A
Output:
USB-a:5V3A、5V4.5A、9V2A、12V1.5A
USB-C2:5V3A、9V2.22A、12V1.67A
USB-C3:5V3A、9V2A、12V1.5A
USB-A+USB-C2/C3：5V3A
The power bank has passed FCC and CE certification.
The measured length of this mobile power bank is 158.27mm.
The width is 49.78mm.
The thickness is 46.71mm.
Feel the size of the power bank in your hand.
In addition, the total weight of the power bank with two wires was measured to be about 473g.
The USB-C2 port supports FCP, SCP, AFC, QC3.0, PD3.0, and DCP charging protocols as measured by using the ChargerLAB POWER-Z KM003C.
PDO packets show that the USB-C2 port has three fixed voltage ranges: 5V3A, 9V2.22A, and 12V1.67A.
The USB-C3 port in the cable management slot supports FCP, SCP, AFC, QC3.0, DCP, and Apple 2.4A charging protocols.
It was measured that the USB-C3 port supports FCP, SCP, AFC, QC3.0, and DCP charging protocols.
Gendome 15000mAh power bank dismantling
After reading the appearance and test of this mobile power supply, let's disassemble it and take a look at the internal scheme and materials.
First, pry off the wireless charging cover plate of the watch on the side of the power bank.
Inside the cover are fixing screws and a wireless charging coil.
The wireless charging coil is wound with litz wire.
Close-up of housing fixing screws.
Unscrew the fixing screws and push out the internal movement.
The PCBA module is fixed inside the plastic frame.
The battery is also fixed inside a plastic frame with foam cushioning.
The PCBA module is fixed to the frame by screws.
Close-up of the screws securing the PCBA module.
The wireless charging coil that charges the Apple Watch is connected by soldering.
Unscrew the fixing screws, solder and disassemble the connection between the battery and the PCBA module, and remove the battery and CBA module from the frame.
The front of the PCBA module is soldered, the USB-C and USB-A receptacles are soldered on the left, the fuel gauge detection button is soldered to the right, the battery protection circuit, the protocol chip, the VBUS switch tube, the synchronous buck-boost circuit and the wireless charging chip.
A thermistor is welded on the back to detect the battery temperature.
The buck-boost chip is from Nanxin Technology, model SC8815, which is used for DC input buck-boost voltage conversion, charging the built-in battery and USB-C interface output. SC8815 is a bidirectional synchronous buck-boost controller with integrated I2C interface, supporting 2.5-36V input and output voltage ranges, supporting battery charging, in which the battery charging current and voltage, reverse discharge output voltage, input and output current limit can be controlled by the I2C bus, the chip has under-voltage protection, over-voltage protection and over-current protection, and supports short-circuit protection and over-thermal shutdown protection.
According to the dismantling of the charging head network, Nanxin's fast charging solution is widely used in mobile power supplies, chargers, car chargers and other fields, and has been used by Anker PowerHouse II 400 outdoor power supply, Empire 300W portable energy storage power supply, Zimi 20 200W PD fast charging power bank, Zhengtuo 100W bidirectional fast charging mobile bank SuperTank Pro, Samsung 10000mAh 25W PD fast charging power bank, Xiaomi 20000mAh mobile power bank 50W super flash charging version and other dozens of products.
Close-up of synchronous buck-boost switch and alloy inductor.
The half-bridge MOS transistor at the end of the battery is from Tuofeng, model TF025N06NG, NMOS, withstand voltage 60V, conduction resistance 2.5mΩ, and is packaged in PDFNWB5*6-8L.
The two MOS tubes on the output half-bridge are of the same type.
The input filter capacitor specification is 100μF 16V.
The specifications of the filter capacitors at the output end are the same.
The wireless charging main control chip adopts Yingjixin IP6829, which is a wireless charging transmitter control SoC chip, compatible with the latest WPC Qi V1.3 standard, supporting A11, A11a, MP-A2 coils, supporting 5W, Apple 7.5W, Samsung 10W, 15W wireless charging. IP6829 integrates full-bridge drive circuit and voltage & current ASK communication demodulation module, which has a high degree of integration, effectively reducing the solution size and BOM cost.
Yingjixin IP6829 data information.
The protocol chip comes from Xinhai Technology, model CSU3AF10, and is a USB-C controller that supports USB Type-C and PD3.0 fast charging protocols. CSU3AF10 built-in 8-bit RISC core, built-in 32K*16-bit FLASH, built-in 2K SRAM, and supports two independent Type-C ports. It supports QC4, supports Huawei SCP, FCP, Samsung AFC fast charging protocols, and supports a variety of fast charging protocols.
CSU3AF10 supports external NTC overtemperature detection, provides QFN28/QFN24 package, is suitable for fast charging source, HUB and DOCK applications, and adds USB PD3.1, UFCS and other fast charging protocols.
Five VBUS switches from Yiyuan, model ET6303, PMOS, withstand voltage -30V, conduction resistance 8.5mΩ, in PDFN3333 package.
Four LEDs are used for the built-in battery level indication.
The SMD button is used for fuel level detection.
Battery protection chip silk screen printing 12AB, from Hongkang.
Two battery protection tubes silk screen printed L2030.
A boost chip is from Weimob, silkscreen Y5UH.
Close-up of the 22μH boost inductor used with it.
Weimob ME6203 3.3V regulator tube is used for regulated output.
Close-up of a thermistor used to detect battery temperature.
The USB-C receptacle is soldered through the hole, and the blue tongue does not show copper.
The USB-A receptacle is soldered with a sinking plate to reduce the thickness.
Attach the thermal pad to the position corresponding to the PCBA module on the inside of the plastic frame.
The built-in battery is glued to the inside of the frame.
The positive electrode of the battery is connected by a nickel sheet.
The negative electrode of the battery is also connected by spot welding of nickel chips, and a blue plastic film is pasted on the explosion-proof valve to indicate the negative electrode.
The length of the battery is about 140mm measured using a ruler.
The diameter of the battery is about 33mm, and the battery is 33140 size.
There is a two-dimensional code at the positive pole of the battery, marked with 15AH and 48Wh, which is a lithium iron phosphate battery with a rated voltage of 3.2V.
A list of all dismantling and a family photo.
Summary of the dismantling of the charging head network
Gendome is a power bank designed with a 2C1A interface, supports 20W fast charging output and 18W fast charging input, and has an Apple Watch magnetic wireless charging at one end to support charging Apple Watch. The power bank is a long cylindrical design, with an aluminum alloy shell and a built-in 15000mAh lithium iron phosphate battery, which is durable.
Through the dismantling of the charging head network, it was learned that Gendome's mobile power supply has a built-in 33140 lithium iron phosphate battery, and the PCBA module and battery are assembled and insulated by a plastic frame. The internal power supply uses Nanxin Technology's SC8815 synchronous buck-boost converter with Xinhai Technology's CSU3AF10 protocol chip, and the wireless charging adopts Yingjixin's IP6829 highly integrated SOC chip, and the battery is equipped with a thermistor for temperature detection. The internal structure is compact and the safety measures are comprehensive.