Fully Open CCS Charge Controller (FOCCCI)
Disclaimer: This Page is still work in progress! Any information written here is a draft only and should be handled as such. Contributions more then welcome. If you have questions please ask them in the discussion section of the page or in the OpenInvert Forum.
This page is about FOCCCI. FOCCCI is an open source CCS Charge Controller started by Uhi and developed by the OpenInverter Community.
Here you will find documentation on the Hardware, where to get it (or how to build it yourself), News regarding the development and many more great things.
On Foccci runs the reference software CCS32Clara (also referred to as Clara).
Foccci in the OpenInverter Forum.
Pin description
External connector ("Deutsch Header")
| Pin nr | Short name | Description |
|---|---|---|
| A1 | ||
| A2 | ||
| A3 | ||
| A4 | ||
| A5 | IN_U_HV | Analog input 0 to 5V, with pull-down-resistor. Can be used to measure the charge port voltage, using a converter board, e.g. the "muehlpower board" |
| A6 | ||
| A7 | SW2_LS | Low-side switch for charge port contactor 2.
Controls one of the contactors to make the connection between the HV battery and the vehicle inlet. One side of the contactor is usually connected to 12V, the other side to A7, which is pulled pulled to ground by Foccci to turn-on. The output can drive inductive load without additional circuits. It will clamp the turn-off voltage to ~40V. The driver has protection against shortcut and thermal overload. The output can be configured to be just digital on/off, and can also be configured to use PWM. BUT: In Foccci versions 4.2 and 4.3 (maybe more) the output driver is only capable of slow PWM, which is hearable and may cause trouble with the contactors. So it is recommended to NOT use the PWM feature, and instead use contactors which do not require economizing or use external economizers. In case you want the PWM nevertheless, you need a external freewheeling diode. |
| A8 | ||
| A9 | ||
| A10 | ||
| A11 | ||
| A12 | ||
| B1 | ||
| B2 | ||
| B3 | ||
| B4 | ||
| B5 | ||
| B6 | SW1_LS | Low-side switch for the charge port contactor 1. See description of SW_LS2. |
| B7 | ||
| B8 | ||
| B9 | ||
| B10 | ||
| B11 | ||
| B12 |
Internal connectors
| short name | description |
|---|---|
| UART TX | Provides logging information, 921600 Baud. See also https://github.com/uhi22/ccs32clara/blob/main/doc/clara_user_manual.md#serial-logging |
| UART RX | Not used |
| SWCLK | for flashing with STLINK |
| SWDIO | for flashing with STLINK |
Hardware detection
To allow software to reliably detect which version hardware it runs on, in HW version 4.1 a version indication resistor was added. As opposed to some other boards that run at 5.3V, the voltage here is 3.3V.
| Variant | R1 | R2 | voltage | ADC | -3% | +3% |
|---|---|---|---|---|---|---|
| - | 47 | 2,7 | 0,179 | 222 | 216 | 229 |
| - | 47 | 3,3 | 0,217 | 269 | 261 | 277 |
| - | 47 | 3,9 | 0,253 | 314 | 304 | 323 |
| - | 47 | 4,7 | 0,300 | 372 | 361 | 383 |
| - | 47 | 5,1 | 0,323 | 401 | 389 | 413 |
| - | 47 | 5,6 | 0,351 | 436 | 423 | 449 |
| - | 47 | 6,8 | 0,417 | 518 | 502 | 533 |
| - | 47 | 7,5 | 0,454 | 564 | 547 | 580 |
| 4.0 with economizer | 47 | 8,2 | 0,490 | 608 | 590 | 627 |
| - | 47 | 9,1 | 0,535 | 664 | 644 | 684 |
| 4.2 | 47 | 10 | 0,579 | 718 | 697 | 740 |
| 4.3 | 47 | 12 | 0,671 | 833 | 808 | 858 |
| 4.4 | 47 | 15 | 0,798 | 991 | 961 | 1020 |
| 4.5 | 47 | 18 | 0,914 | 1134 | 1100 | 1168 |
| 47 | 22 | 1,052 | 1306 | 1266 | 1345 | |
| 47 | 27 | 1,204 | 1494 | 1449 | 1539 | |
| 47 | 33 | 1,361 | 1689 | 1639 | 1740 | |
| 47 | 39 | 1,497 | 1857 | 1801 | 1913 | |
| 47 | 47 | 1,650 | 2048 | 1986 | 2109 | |
| 47 | 56 | 1,794 | 2226 | 2160 | 2293 |