From 590f341ed9c5c29aab5d2f51aa7fd8c30f08d103 Mon Sep 17 00:00:00 2001 From: sigil-03 Date: Fri, 29 Aug 2025 22:40:35 -0600 Subject: [PATCH 1/2] add INR18650-35E cell and charger strawman --- hardware/power.md | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hardware/power.md b/hardware/power.md index 44e62e2..0cbf511 100644 --- a/hardware/power.md +++ b/hardware/power.md @@ -5,6 +5,9 @@ Strawman design proposal: 1S LiPo, 18650 for easy ubiquitous availability (~3,000 mAh). Add cells in parallel until you get the capacity you want. +## CELLS +[INR18650-35E](https://lygte-info.dk/review/batteries2012/Samsung%20INR18650-35E%203500mAh%20%28Pink%29%20UK.html) + ## CHARGERS 1. [5V 2A USB-C](https://www.amazon.com/DWEII-Converter-Step-Up-Charging-Protection/dp/B09YD5C9QC/) 2. [5V 2A](https://www.amazon.com/Ruiwaer-Discharge-Integrated-Adjustable-Charging/dp/B08QHVW5J8) @@ -13,6 +16,7 @@ Strawman design proposal: 1S LiPo, 18650 for easy ubiquitous availability * combine with [heatsink](https://www.amazon.com/Printer-Heatsink-Thermal-Conductive-Adhesive/dp/B07RKHRHJV) +strawman: charging up to 4v with the INR18650 (see `CELLS:INR18650-35E` for the discharge capacity graph, and `CHARGERS:3` for 4V cutoff w/ a 5V panel) gives us ~3000mAh, or 92% of the battery life. ## BMS 2. [3S 60A](https://www.amazon.com/dp/B0B9MMZWXC) @@ -21,3 +25,4 @@ Strawman design proposal: 1S LiPo, 18650 for easy ubiquitous availability * mppt charge controllers: 1. 2. + From 5e7abe462102b11a079b77135307548fa4f27522 Mon Sep 17 00:00:00 2001 From: sigil-03 Date: Fri, 29 Aug 2025 22:45:35 -0600 Subject: [PATCH 2/2] i didn't do math right --- hardware/power.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hardware/power.md b/hardware/power.md index 0cbf511..51c5c34 100644 --- a/hardware/power.md +++ b/hardware/power.md @@ -16,7 +16,7 @@ Strawman design proposal: 1S LiPo, 18650 for easy ubiquitous availability * combine with [heatsink](https://www.amazon.com/Printer-Heatsink-Thermal-Conductive-Adhesive/dp/B07RKHRHJV) -strawman: charging up to 4v with the INR18650 (see `CELLS:INR18650-35E` for the discharge capacity graph, and `CHARGERS:3` for 4V cutoff w/ a 5V panel) gives us ~3000mAh, or 92% of the battery life. +strawman: charging up to 4v with the INR18650 (see `CELLS:INR18650-35E` for the discharge capacity graph, and `CHARGERS:3` for 4V cutoff w/ a 5V panel) gives us ~3000mAh, or 88% of the 3398mAh tested battery life. ## BMS 2. [3S 60A](https://www.amazon.com/dp/B0B9MMZWXC)