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| author | user <user@node5.net> | 2024-03-11 11:31:58 +0100 |
|---|---|---|
| committer | user <user@node5.net> | 2024-03-11 11:31:58 +0100 |
| commit | 1ede08d1790d1046c06343f273711fe68ab62f83 (patch) | |
| tree | 5270392ffa4cbed5598f5aeca1b6f86171db8626 /Power bank 20v USB-C PD | |
initial commit with 18 articles
Diffstat (limited to 'Power bank 20v USB-C PD')
17 files changed, 104 insertions, 0 deletions
diff --git a/Power bank 20v USB-C PD/3d_model_plan.jpg b/Power bank 20v USB-C PD/3d_model_plan.jpg new file mode 100644 index 0000000..c49ec20 --- /dev/null +++ b/Power bank 20v USB-C PD/3d_model_plan.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/Thumbnail.jpg b/Power bank 20v USB-C PD/Thumbnail.jpg new file mode 100644 index 0000000..2c03c67 --- /dev/null +++ b/Power bank 20v USB-C PD/Thumbnail.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/battery_pack_back.jpg b/Power bank 20v USB-C PD/battery_pack_back.jpg new file mode 100644 index 0000000..1683af8 --- /dev/null +++ b/Power bank 20v USB-C PD/battery_pack_back.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/battery_pack_back_2.jpg b/Power bank 20v USB-C PD/battery_pack_back_2.jpg new file mode 100644 index 0000000..1ca6f95 --- /dev/null +++ b/Power bank 20v USB-C PD/battery_pack_back_2.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/battery_pack_front.jpg b/Power bank 20v USB-C PD/battery_pack_front.jpg new file mode 100644 index 0000000..4565eaa --- /dev/null +++ b/Power bank 20v USB-C PD/battery_pack_front.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/case_model.png b/Power bank 20v USB-C PD/case_model.png new file mode 100644 index 0000000..1dfdd6c --- /dev/null +++ b/Power bank 20v USB-C PD/case_model.png Binary files differdiff --git a/Power bank 20v USB-C PD/electronics.jpg b/Power bank 20v USB-C PD/electronics.jpg new file mode 100644 index 0000000..f108091 --- /dev/null +++ b/Power bank 20v USB-C PD/electronics.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/finished_bottom.jpg b/Power bank 20v USB-C PD/finished_bottom.jpg new file mode 100644 index 0000000..a88350e --- /dev/null +++ b/Power bank 20v USB-C PD/finished_bottom.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/finished_lcd.jpg b/Power bank 20v USB-C PD/finished_lcd.jpg new file mode 100644 index 0000000..a5cc3ce --- /dev/null +++ b/Power bank 20v USB-C PD/finished_lcd.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/finished_top.jpg b/Power bank 20v USB-C PD/finished_top.jpg new file mode 100644 index 0000000..b75d13b --- /dev/null +++ b/Power bank 20v USB-C PD/finished_top.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/index.md b/Power bank 20v USB-C PD/index.md new file mode 100644 index 0000000..e187a6a --- /dev/null +++ b/Power bank 20v USB-C PD/index.md @@ -0,0 +1,104 @@ +--- +description: "Laptop power bank" +created: 2022-11-13 +--- + + + +A DIY power bank with 20v USB type C power-delivery. +I had a bunch of 18650's from a previous project, +that were no longer in use... see [Electric longboard](/Electric longboard) + +## Parts list: + - [20V USB C PD Bidi buck boost converter](https://www.aliexpress.com/item/1005004629297118.html) + - [18650 holders](https://www.aliexpress.com/item/1005002749793325.html) + - [Heatsinks](https://www.aliexpress.com/item/32969500753.html) + - [USB C PD tester](https://www.aliexpress.com/item/1005002767097993.html) + - [4S li-ion BMS with balancing](https://www.aliexpress.com/item/1005001916022803.html) + - [Battery capacity display](https://www.aliexpress.com/item/4000448424977.html) + - Samsung-30q 18650 li-ion batteries (got these from a trustworthy local seller) + +## Plan + + + + +The battery pack is designed as a 4s 3p pack (4 in series and 3 in parallel). +So the batteries will be connected altering + and - every 3 cells. + +## Component testing + + + +I've tested the electronic components by connecting the bare minimum of batteries 4s 1p. +You have to connect power the the board once, and then it works. +I used a USB c PD trigger board to test the PD capability. +It works, but the buck boost converter coil gets very hot, +even with the heatsink on. Will have to use a bigger heatsink for it. +Possibly on the back, though i need to insulate 2 points on the back, +that aren't part of the ground plane, like the rest of the back. +The mosfets on the BMS don't heat up, +could probably go without the heatsinks. +I also need to design a case and 3D print it. +The setup works but i'm worried about a short before the BMS. +So i will probably redo the wiring. + + + +Redid the wiring with the lessons learned during testing, +and based on feedback from others. +The Bi-Di module only seems to heat up when stepping down the voltage a lot, +i think the current cooling will be adequate. + +Someone just showed me an even better, but more expensive board: +[100W PD and 120W DC power bank module](https://www.aliexpress.com/item/1005004508048246.html) +maybe for a future powerbank. + +## Designing enclosure + + + + +After learning [FreeCAD](https://www.freecadweb.org/), +i designed and 3D printed a case. +It's designed to use a transparent acrylic as the top and bottom. +You can download the model files here: +TODO Add files +[FreeCAD Model](/files/powerbank/POWERBANK.FCStd), [BackPart](/files/powerbank/POWERBANK-part1.stl), +[FontPart](/files/powerbank/POWERBANK-part2.stl),[Button](/files/powerbank/POWERBANK-button.stl) + + + + + +Printed the case. The fit seems great +I mounted the screen with some double sided tape, +some screws that i heated up with my soldering iron, and some glue. +I also shortened the button on the screen and put in a 3d printed button. +Seems to click OK, and it's recessed a bit, +so it won't be turned on accidentally. + + + + + +## Future ideas + - I think the screws are too close to the edge, so i got a new idea. + 3D print a cover out of TPU for all the edges. + - It would be really cool to add a micro controller with power messurement, + and an LED strip displaying the remaining charge. + +## Laser cut acrylic sheets + + + + +Some fellow hackers were super kind, to laser cut acrylic sheets for me, +that has this cool reflective film that changes color based on the angle of the light. +It features ventilation holes for the PD module and engraved text. +It's way more precise, and the side of the cut is super clear. + +## External links: + - [youtube.com - BMS explanation video](https://www.youtube.com/watch?v=QNENyu97w2A) + - [youtube.com - GreatScott! PD module video](https://www.youtube.com/watch?v=_WI9Nwqvplo) + diff --git a/Power bank 20v USB-C PD/laser_cut_lcd.jpg b/Power bank 20v USB-C PD/laser_cut_lcd.jpg new file mode 100644 index 0000000..57420fa --- /dev/null +++ b/Power bank 20v USB-C PD/laser_cut_lcd.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/laser_engraved_node5.net.jpg b/Power bank 20v USB-C PD/laser_engraved_node5.net.jpg new file mode 100644 index 0000000..299941d --- /dev/null +++ b/Power bank 20v USB-C PD/laser_engraved_node5.net.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/lcd.jpg b/Power bank 20v USB-C PD/lcd.jpg new file mode 100644 index 0000000..d5dfbb7 --- /dev/null +++ b/Power bank 20v USB-C PD/lcd.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/main.jpg b/Power bank 20v USB-C PD/main.jpg new file mode 100644 index 0000000..c1b7050 --- /dev/null +++ b/Power bank 20v USB-C PD/main.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/print.jpg b/Power bank 20v USB-C PD/print.jpg new file mode 100644 index 0000000..2056fe6 --- /dev/null +++ b/Power bank 20v USB-C PD/print.jpg Binary files differdiff --git a/Power bank 20v USB-C PD/usb_c_connector.jpg b/Power bank 20v USB-C PD/usb_c_connector.jpg new file mode 100644 index 0000000..d0faf17 --- /dev/null +++ b/Power bank 20v USB-C PD/usb_c_connector.jpg Binary files differ |
