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I have a working ESP32 S3 project that requires some batteries. The project consists of 2 boxes, the controller and the launcher, each with an ESP32 S3 micro-controller running a state machine to control the hardware. The boxes talk to each other over a private peer to peer network. Prototypes of both boxes are working.
The controller has some LEDs to show its state, and some buttons/switches to control the state. The controller sends commands to the launcher based on the controller's state. A rough calculation (I need to verify with measurements) of the current needed is 360 mA, which for an 8 hour day comes to ~3.84 A-hr at 5V. The majority of the current needed is for the ESP32 S3 to maintian commmunication with one-many launchers.
The launcher also has some LEDs and other hardware and sends data back to the controller. The main purpose of the launcher is to deliver 3 - 5 A at 10-12V to a resistive load for 1 - 5 seconds every 5-10 minutes per hour for an 8 hour day. Then the launcher batteries can be recharged. A rough calculation of the nominal operating current for the board is 670 mA @ 5V, for a total of 7.68 A-hr @ 10-12V.
Currently, I am using a 3S configuration of Molicel INR-21700-P42A cells to power the launcher with a cheap 3S BMS from Amazon and a separate battery charger. I want to design/build a BMS for this pack. I am looking for suggestions on chips to use and maybe some open source designs to look at for guidance. Also, other battery suggestions if you think there is something better (cheaper, smaller, etc.).
I am using a 3S configuration with the same Molicels for the controller (with the same cheap 3S BMS and separate charger), only because I have them on hand. I need to test it with a 2S configuration, and probably a different battery type as the Molicels I have on hand seem to be way overkill for the controller. Again, I need to design a BMS for the 2S configuration (with different batteries?).
Thanks in advance for any guidence you can offer!
The controller has some LEDs to show its state, and some buttons/switches to control the state. The controller sends commands to the launcher based on the controller's state. A rough calculation (I need to verify with measurements) of the current needed is 360 mA, which for an 8 hour day comes to ~3.84 A-hr at 5V. The majority of the current needed is for the ESP32 S3 to maintian commmunication with one-many launchers.
The launcher also has some LEDs and other hardware and sends data back to the controller. The main purpose of the launcher is to deliver 3 - 5 A at 10-12V to a resistive load for 1 - 5 seconds every 5-10 minutes per hour for an 8 hour day. Then the launcher batteries can be recharged. A rough calculation of the nominal operating current for the board is 670 mA @ 5V, for a total of 7.68 A-hr @ 10-12V.
Currently, I am using a 3S configuration of Molicel INR-21700-P42A cells to power the launcher with a cheap 3S BMS from Amazon and a separate battery charger. I want to design/build a BMS for this pack. I am looking for suggestions on chips to use and maybe some open source designs to look at for guidance. Also, other battery suggestions if you think there is something better (cheaper, smaller, etc.).
I am using a 3S configuration with the same Molicels for the controller (with the same cheap 3S BMS and separate charger), only because I have them on hand. I need to test it with a 2S configuration, and probably a different battery type as the Molicels I have on hand seem to be way overkill for the controller. Again, I need to design a BMS for the 2S configuration (with different batteries?).
Thanks in advance for any guidence you can offer!
