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Designing the PCB on the first board
Greenpower Battery Charger
What is It
An intellegent, networked, Greenpower battery charger.
Specification
- Able to charge 12 Greenpower 12V 33 Amp/Hour batteries. (Can do more).
- Expandable design. Single controller with a charger module per battery.
- Connected to Internet using Ethernet or WiFi.
- Charges batteries with a max current of 1A.
- Charge algorithm is: Charge with max current of 1Amp and max voltage of 14.1V. Switch off when current reduces to about 100mA. All programmable.
- Logs the charging process to calculate how many Amp/Hours put into the battery.
- Could have option to do discharge tests (switches in a "big" resistor and measures voltage/current during discharge).
Design
- Uses Raspberry Pi as controller and network interface.
- Chaging modules use PIC/Atmel/STM32 processor. Drives PWM into battery and measures current and voltage.
- Uses I2C interface buse between Raspberry Pi and charging modules
Implementation
Testing
Conclusions
Todo
| Status | Item |
|---|---|
| Think about overal design and create design information | |
| Case design | |
| Design charging modules. | |
| Design charging modules PCB | |
| Make PCB's | |
| Purchase components | |
| Build PCB's | |
| Write test software for controller | |
| Write test software for charging module | |
| Test |