When hearing the word "energy storage power supply", many people will think that this is a big box, big and heavy. Today, we will dismantle a different box.YoobaoFeather BoEN2 is such a lightweight energy storage power supply. It weighs only 1800g, less than 2L of soda, but it can support200WInverter output to meet the use of small appliances and emergency charging.
At the same time, this energy storage power supply also has a USB-C interface, which supports 65W charging and discharging. When in use, it can directly charge the laptop, or use the PD fast charge for charging. No special charger is included, which reduces the product cost and also reduces the burden on users. The charging head network will disassemble this energy storage power supply to see how the internal design is.
The packaging box is red and white, with Yoobao brand, product name, EN2 model, appearance and selling points printed on the front. From the appearance diagram, we can know that the product can also illuminate.
The product application scenario and parameter table are printed on the back, which can be seen from the scenario diagramFeather BoThis multi-functional portable energy storage power supply can support simultaneous charging of mobile phones and laptops.
A close-up of the product parameter list in both Chinese and English.
The package contains energy storage power supply, charger, data cable and operation instructions.
Attached with the charger, the maximum output power is 20W, and the white shell in straight plate shape has a classic appearance.The attached data cable is CC cable, which is short and easy to use.
The back of the charger body is printed with parameter information, model RY-U56, supporting 100-240V~50/60Hz 0.6A input, and 5V3A, 9V2.22A, 12V1.67A output. The manufacturer is Shenzhen Ruiyuan Industrial Co., Ltd.
Feather BoThe energy storage power supply EN2 is made of plastic and metal shells. The waist metal shell is integrally formed, the back is sandblasted, the transition between the sides is smooth, and the top is equipped with a strap to facilitate product handling.
One end of the machine body uses four USB interfaces: power key, power digital display screen, lights and 3A1C. The USB-A1 interface also supports fast charging. The red rubber core is used to distinguish, which is intuitive and clear.
The other end is equipped with 3+2 AC socket and corresponding switch key, the key is printed with switch logo, and the side is also equipped with indicator light, all of which are designed for the convenience of users.In addition, there is also a heat dissipation window, which can effectively avoid heat accumulation inside the product.
The measured length of the fuselage is about 23.7cm.
The width is 81.3mm.
The thickness is 81.2mm.
The net weight of the product is about 1.76kg.
Using ChargeLAB POWER-Z KT002, it is measured that the USB-C interface supports Apple 2.4A, Samsung 5V2A, DCP protocols, as well as QC2.0/3.0, PD3.0, and PPS fast charging protocols.
It also has five sets of fixed voltage gears: 5V3A, 9V3A, 12V3A, 15V3A, 20V3.25A, and two sets of PPS voltage gears: 3.3-11V3A and 3.3-21V3A.
It is measured that USB-A1 fast charging port supports QC2.0/3.0, AFC and FCP fast charging protocols.
It is measured that the USB-A2 interface supports Apple 2.4A, Samsung 5V2A and DCP protocols.
It is measured that the USB-A3 interface also supports Apple 2.4A, Samsung 5V2A and DCP protocols.
Use the attached 20W charging kit to charge the energy storage power through the USB-C port, and the measured input power is 20W.
Disassembly of Yubo energy storage power supply EN2
After having a basic understanding of the appearance and performance of Yubo Energy Storage Power Supply EN2, we will continue to disassemble it to see how the internal materials are made.
Remove the side cover plate of AC output end to expose the internal fixing screws.
The AC output socket, cooling fan and power switch are fixed on the cover plate, and the AC output socket and power switch terminal are covered with white plastic insulation caps.
Separate the terminal block and remove the side cover plate.
The power switch, output socket and cooling fan are installed inside the cover plate.The cooling fan is fixed by screws.
Remove the side aluminum alloy housing and continue disassembly.
Below the side cover is the inverter module.
Side view of inverter module, edge welding of boost switch tube and output modulation tube.
Remove the shell and paste highland barley paper insulation protection on the battery protection board.
The wire on the other side is covered with yellow wax pipe for protection and insulation.
Tear off the highland barley paper. Below is the battery protection board. Let's start with the battery pack.
Solder down the connecting line of the battery pack, and take out the battery pack from the internal frame.The battery pack is 7 in parallel and 3 in series, with a total of 21 batteries.
Paste adhesive tape on the side of the battery pack to fix it.
A close-up of the thermistor on the side of the battery pack is used to detect the temperature of the battery for overheating protection.
Cut off the tape on the side of the battery. The battery is 18650 from DBK Dibico, and the rated voltage is 3.7V.
The front of the battery protection board is at a glance. The upper and lower parts of the protection board are the connection points of the positive and negative nickel strips of the battery. The left side is the inverter power supply output, providing under voltage and over-current protection for discharge. The right side is connected to the USB PD fast charging module, providing charge and discharge protection.The protection plate is welded with thermistor to provide the temperature protection function of the battery.
The battery protection chip of the protection board adopts BYD BYD Semiconductor BM3551, which is a lithium battery protection chip for 3/4/5 series. The chip has high-precision overcharge and overdischarge detection, supports three-stage discharge overcurrent detection, has perfect protection functions, and supports cascade applications, which can realize the protection function of 6 series and more battery packs.
Saiwei CW1051AL secondary protection chip is used for independent overcharge and disconnection protection of battery packs, and supports 3/4/5 series battery applications.
The battery protection tube is screen printed with BM07S30N2, 7 in parallel, and sealed with TO252.
Three BM07S30N2 are connected in parallel for battery charging protection.
Close up of the sampling resistance of the negative current at the battery end. Four R005 resistors are connected in parallel to detect the charging and discharging current of the battery.
The other side is a USB PD fast charging module, which connects the positive and negative poles of the battery pack, detects the status of the AC switch, and outputs the control signal of the inverter.The upper 1m Ω current detection resistance is used to detect the working current of the inverter for over-current protection control.
The inside of the shell corresponds to LED lights, power switch keys, display screen and the window opening of USB base.
Close up of LED lamp, aluminum base plate is fixed on the shell through plastic plate.
Remove the lamp cup and close-up the LED lamp on the patch.
Two inductors are welded on the front of the USB fast charging module, which are respectively used for USB input/output function and LED light drive. The upper left corner is LED digital tube power display, and the right side is hollowed out to place lights.The center of the circuit board is the USB-C female seat, and the lower part is three USB-A female seats. Orange supports fast charging, and white is 5V output.
The back of the USB fast charging module is welded with a synchronous voltage rise and fall controller and four corresponding switch tubes, as well as the current sampling resistance and two sockets.
Yubo EN2 energy storage power supply is built with Yingjixin IP5389, which is a synchronous voltage rise and fall controller integrated with protocol function, which can realize complete mobile power function, support power management SOC chip with power display function, support 2-5 series battery applications, and can replace the combination of protocol chip, single chip microcomputer and voltage rise and fall controller in traditional voltage rise and fall scheme,It greatly shortens the product development cycle and reduces the cost.
Yingjixin IP5389 supports USB-A, USB-C ports, Micro USB interface and Lightning interface power supply input, and all interfaces support fast charging.The fast charging protocol supports Huawei FCP, SCP, Samsung AFC, OPPO VOOC, PD3.0 fast charging protocol, PPS, and the maximum output power of 20V5A 100W, which can realize rich fast charging support of full interface.
IP5389 has a built-in voltage rise and fall controller, which supports bi-directional voltage rise and fall charging and discharging, maximum 5A charging current and adaptive current regulation by driving external MOS tubes.It supports 2/3/4/5 series batteries and more than 4.2, 4.3, 4.35 and 4.4V batteries.The chip has a built-in electricity meter, which supports 4 LED power indication, or 88/188 digital tube power display. It supports setting the battery capacity through resistance, or learning the battery power, to achieve accurate power display.
The upper tube of synchronous voltage rise and fall battery end is from Guanyu, model KS3214NAT, NMOS, withstand voltage 30V, conductivity 4.5m Ω, and is packaged with PDFN5060.
The other three switch tubes are screen printed with 6428 to form an H-bridge for voltage rise and voltage drop conversion.
Close up of MOS tubes of the other two silk screen 6428.
Filter solid capacitor at battery end, from Raytheon, specification 100μF 25V。
The filter capacitance specification of output terminal is 100μF 25V。
LM358 dual operational amplifier cooperates with sampling resistor for current detection and amplification.
The voltage stabilizing chip comes from MicroUnion, screen printed C2UE, and is used for voltage reducing power supply.
VBUS switch tube for USB-C port input/output control.
VBUS switch tube for USB-A fast charging port output control.
VBUS switch tube for USB-A port output control.
Dual channel identification chip for automatic identification of USB-A port, silk screen A12X.
The LED light driver is from MicroUnion, model ME2215, which is a step-down LED driver with built-in switch tube.
forty-sevenμClose up of H magnetic adhesive inductance, used for LED drive.
Finally, come to the inverter module.
The bottom of the inverter module is the DC boost switch tube, and the right side is the output AC modulation part. The DC boost switch tube heats up through the shell, and the AC output modulation switch tube heats up through the shell through the heat sink and heat conduction pad.The middle position of the module is the step-up transformer.
DC wiring on the back of the inverter module adds tin with large current to increase the sectional area and reduce the resistance.It can be seen from the back that there is an isolation slot on the circuit board for high and low voltage isolation.
DC input filter capacitor is from Kaizexin, with specification of 2200μF 25V。
Two step-up switch tubes are from China Resources Microelectronics, the model is CS150N04A8, the withstand voltage is 40V, the resistance is 3.6m Ω, the TO220 is used for packaging, and the insulation pad is used to dissipate heat through the shell.
The low-voltage MOS tube driver uses the Fengdang Technology FD2024S dual low end grid driver, which supports 4-18V power supply, is compatible with 3.3/5V input level, and supports undervoltage protection.
Modulation chip for DC boost driving signal output.
EL357N optocoupler for feedback regulation of output voltage.
The transformer is attached with information label, screen printed T301V200M3S-220.
The inverter uses four diodes to form a rectifier bridge, which is used to rectify the AC output into pulsating DC, and then filter it through an electrolytic capacitor. The electrolytic capacitor is from Kaizexin, with a specification of 47μF 400V。
The inverter uses four silk screen FXN4613F NMOS transistors for output modulation.
The other two FXN4613F, four of which form the H bridge.A thermistor is welded between the two pipes and fixed with glue for temperature detection.
Close up of thermistor used to detect transformer temperature.
Filter capacitor supplying power to inverter control circuit, specification: 47μF 25V。
78L05 is used for regulated power supply.
Two capacitors are used for 7805 input and output filtering.
A non-standard chip for AC output modulation.
D882 triode.
Dual color diode to support output status.
A blue safety Y capacitor.
After all disassembly, let's have a family photo.
Disassembly summary of charging head network
Yubo EN2 energy storage power supply adopts aluminum alloy shell, which is more upscale on the whole. The two end faces are AC inverter output and PD fast charging panel respectively, and at the side of PD fast charging panel with higher utilization rate, leather handles are added for easy use.AC inverter support200WThe output power can meet the power supply demand of small household appliances.The PD supports 65W two-way fast charging, and the USB-A port supports 18W fast charging to meet the power supply requirements of mobile phones and laptops.
The charging head network learned from the disassembly that Yubo EN2 energy storage power supply is equipped with 3 series 7 parallel 18650 battery packs.The battery protection board adopts BYD BM3551 in cooperation with Saiwei CW1051 for battery overcharge, over discharge, overcurrent and overheat protection.The PD fast charging module uses the Yingjixin IP5389 all-in-one SOC chip for voltage rise and drop control and protocol identification functions, and supports multiple USB interface outputs.
The inverter adopts a separate module design and is equipped with a cooling fan. The primary filter capacitor and high-voltage electrolytic capacitor are from Kaizexin. The output modulation tube and step-up transformer are equipped with thermistors to detect the temperature rise to ensure safe use.The internal modular design of the energy storage power supply is very convenient for factory assembly and maintenance.