Screen display 100W fast charging power bank

Introduction

100W fast charging power bank based on IP5389 chip solution, with OLED display, which can display battery power and temperature, charge and discharge voltage and current; capacitive touch button switch with lighting.

characteristic

• Using Yingjixin IP5389_I2C_AACC fast charging chip, it can realize PD two-way 100W fast charging
• 4 high-rate 18650 batteries, integrated battery protection and balancing chip, with NTC high temperature protection
• Integrated STM8S103 microcontroller and 0.91-inch OLED display, which can display battery power and temperature, charge and discharge voltage and current
• Capacitive touch button with touch indicator light
• With 0.2W lighting

Power consumption description

After the power bank is automatically turned off, the microcontroller will also enter shutdown mode. According to the official manual, the power consumption is 30uA; the touch chip's standby supply is only 1.5uA; the 0.91-inch OLED screen's standby power consumption is only a dozen uA.

structure

• A fast charging motherboard
• A PCB panel
• An OLED screen panel
• Aluminum shell

Note: PCB panel installation uses hidden welding terminals. The drilling position of the shell requires a relatively accurate position and the operation is difficult.

Essential tools

• Heating soldering station, soldering iron
• Electric hand drill, twist drill bit, countersink drill bit
• Spot welding
• file

Known issues

• Current error is about plus or minus 200mA
• The position of the USB port on the panel is deviated and needs to be adjusted.
• The light emitted by the lighting lamp through the lampshade has yellow stripes
• I didn’t notice that the FPC connector with reverse feet is used. It is difficult to find it on Taobao. Currently, it can only be purchased at Lichuang Mall.
• Software BUG

Subsequent optimization

• Added power display and battery voltage display
• The motherboard adds an NTC resistor to display the PCB temperature
• The battery protection chip is replaced by Yingjixin IP3254
• PCB panel USB port position adjustment
• Replacing the positive pin FPC connector
• Consider using a 0.96-inch LCD display to display all information on one interface
• In order to reduce the difficulty of installation, consider using the original 4 screw mounting holes on the front
• The inductor is changed to a patch type, so that except for the A port, which is directly plugged in, the others are patches, which is convenient for soldering on the heating soldering station.
• Software BUG fix

Purchase link

Lighting Shades: Link

Note: All commercial activities are prohibited.

OLED screen panel with 0.2W lighting

PCB panel, with STM8S103 microcontroller and TTP223 touch chip on it, the touch indicator light uses a side-mounted LED light.

The upper NTC is used for battery protection chip; the lower NTC is used for IP5389. When charging, if the battery is detected to exceed 45 degrees, IP5389 will automatically cut off charging; the cable is too long.

Add a piece of 1.5MM foam glue between the battery and the motherboard. During installation, you can directly press the panel to push the battery in.

Put a layer of tape on the inside of the PCB panel to increase the insulation of the PCB traces.

Be sure to add a thermally conductive silicone sheet, otherwise 100W charging and discharging will cause the motherboard to become seriously hot. Even if a silicone sheet is added, long-term 100W charging and discharging will cause the temperature inside the case to exceed 45 degrees, and the motherboard will automatically shut down for protection.

There is basically no problem in downgrading to 60W.

Charging voltage and current display

Discharge voltage and current display

The light needs to be turned on and then pressed and held for 2 seconds to turn it on. When it is turned off, it also needs to be turned on first and then pressed and held for 2 seconds to turn it off. Why can't it be turned on and off directly when the light is turned off?

I found a transparent plastic board, and after cutting it, the installation effect is as follows, which is better than nothing.