[Multi-P video test] Full-protocol two-way fast charging mobile power supply with PCB + copper pillar as the skeleton

Foreword:

We also recommend you to check out the finished product of this project, which has one less PCB layer than this project, is smaller, more mini and efficient https://oshwhub.com/LoveTomb/LoveTomb172

When I saw the long-lost solicitation order, I came to join in the fun and took a look at the general direction of the solicitation order. I feel that the mobile power supply currently being developed is more in line with the theme. For people like me who don’t know how to 3D model and build circuit module casings, At best, I could just add a PCB top plate to the previous modules. Then the accidental inspiration of XX made me explore a mobile power supply solution using PCB + copper pillars to carry the battery. It is indeed better looking than wrapping tape or PVC cards on the surface. In addition, through the preset raised patterns of each layer of PCB, you can consider designing side-mounted acrylic boards or PCBs, which can further enhance the appearance of the shell. Based on the fact that we are still in the development stage of improving the mobile power supply motherboard, the design of the side is still in progress. It's a little slow, but it's just a matter of measuring the spacing with a ruler. I'll also make up for the side design as soon as possible.

Let’s get right to the point:

8-13 Disassembly diagram:

Module parameters:

Chip: Full-protocol fast charging identification circuit controlled by Yingjixin IP5358, supporting all mainstream fast charging protocols! Dual A port output, one C port input and output (PD function expansion), one B port input, two-way fast charging

Components: 1: Battery container skeleton PCB: To be divided into: interspersed PCB, bottom negative spring piece PCB, top positive spring piece PCB 2: module mobile power supply motherboard PCB 3: module top PCB, with engravings on it, feel free to use 4: Several may be used Sponge 5: copper posts, screws, current screw parameters: M3*20+6 copper posts plus white plastic insulating screws

Update log:

2020-7-18 Already have physical display:

For this physical object, the way I connected the battery pack to the motherboard was to solder XT60 wires. Since there are additional via holes in the center of each layer of the board for wiring, and there is a sponge for shielding, although the line loss is very small and the appearance is good enough, It should be further improved, so what I thought of was to install the battery pack with shrapnel, and the power transmission is handed over to copper pillars (the resistance of the copper pillars does not have much impact on the application of mobile power supply). The PCBs included in this project are all built on shrapnel When installing the battery pack, it is designed on the basis of copper pillars conducting current. If you have an early and immature wire bonding solution, you can go to the source project for review!

2020-7-31 Improved physical display:

The battery installation method has been updated, using high-current shrapnel. Here I will post a link to the Taobao shrapnel I bought myself , for reference only. I have repeatedly asked several companies about their parameters. This one can pass 6A current per piece, which is a good choice. (In addition, there is no advertising here, and there is no extra money for me to buy several different shrapnel for comparison, right?) Here is a picture of the actual shrapnel: The PCB version of this update log is: V7 version, V8 version preview: USB adopts vertical side notch Then the socket is replaced by two wide opposite sides to place the input port and the output port respectively, which facilitates the subsequent side PCB shell design and reduces costs. 3D preview: When coding, some numbers are not exposed,,,,, it will be open source sooner or later anyway! Please do not mind!

2020-8-1 Complete 1.0 display:

Complete body under V7PCB master control

2020-8-13 New PCB planning display:

Starting from the V8 version, USB has been plugged vertically to provide convenience for later mounting the case on the side. Unfortunately, the DMDP for vertical plugging was mistaken, causing the V8 board to fail. After repeated routing considerations, it has been designed to V11, and its PCB is in On the basis of V8, the number of front components has been increased, and the number of back components is only a small number of capacitors. The other four USB channels have added TVS electrostatic protection tubes to increase circuit stability. Currently, the PCB of the V10 version has been delivered to Jialichuang for orders. , we will prepare to prototype V11 after the V10 test is completed, (V10 does not come with TVS) The PCB of V11 has been open source, please submit it if you need it ~

2020-8-2 Important update

The DMDP error has been fixed. I have repeatedly confirmed the connection through a multimeter. Starting from the current V12 version, the DMDP problem has been solved!

It’s over for now, but updates will continue! Friends who like it may wish to give it a like! :

This project will continue to be updated until I am satisfied. Although I am already in my senior year of high school, I still want to do things without regrets in this short period of time. At the same time, I am very grateful to the official for their support. From the beginning to now, it is also Through this platform, we have been able to develop rapidly, and we can exchange knowledge and answer questions with professional friends. Thank you very much!