TP4056 - Simple CC/CV Charging Manager - VERY popular? https://youtu.be/KHMAmxKpT8o https://youtu.be/f2yMs-JAyQM https://youtu.be/7hRdjePx1dA https://youtu.be/U7D_msy2fHg Starting to realize the BMS subsystems are a bit simpler than I thought they were. Overvoltage/Overcharge Cutoff Protection is literally as simple as it sounds in most cases, etc. Just need to find a few discrete component BMS and make them make sense so I can make my own. Start Here - Electronoobs Discrete BMS/Charger https://youtu.be/qRVEJjk5B_g https://youtu.be/7AFbrKi0t_4 Another DIY BMS, from GreatScott! https://youtu.be/Fj0XuYiE7HU BMS with Discrete Components https://youtu.be/xY-adIeuMbc https://youtu.be/x5YhSAEzBMg Seems like the best 2h of video content I'm going to find on actually designing one of these. https://youtu.be/OdH3wYeFJ3M DW01 better See also AP9211 https://www.eevblog.com/forum/projects/pain-and-suffering-getting-the-dw01-and-8205a-protection-circuit-work-right/ https://hackaday.com/tag/dw01/ Can't find the DW01 in stock anywhere. I think it's discontinued. https://www.utsource.net/itm/p/1219279.html?srsltid=AfmBOor92qhx9b9Okrh_a9_EqlIGim2ztDQlNY07Zc5RCkjU-C20rBk3 Cool Discontinued and obscure parts specialist site --- ### USB Battery charger + 10A BMS - Interesting, right? https://youtu.be/KHMAmxKpT8o Redesigning a TP4056 board to have a higher current limit. Added in the DW01 for addition protection. This chip seems very common as well. #### DW01 - Battery Protection IC - One-Cell Protection for LiPo/Li-Ion from Overcharge, Overdischarge, and Overcurrent - Overcharge Detection at ±4.25 - Can be powered by the LiPo at 6µA. ![[Pasted image 20250217064403.png]] This chip would surely be lower power than my discrete implementation of these functions. No Prime listings, so I'd have to place another chip order for these. #### TP4056 There are plenty of breakout boards as well as free chips on Prime ![[Pasted image 20250217064908.png]] Okay time to build something ### TL431 Many examples in datasheet ![[Pasted image 20250217100919.png]] ![[Pasted image 20250217101252.png]] ##### Probably the most used component nobody knows of! TL431 Guide! EB#50 https://youtu.be/isutYMU2HHU ##### Overdischarge Cutoff Circuit ![[Pasted image 20250217095938.png]]