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CAN Bus

2020-05-20T04:04:21Z

LiamKinne:

[[Category:Electronics]]

CAN bus is a networking standard designed for communication between devices in an automotive environment. Because of its versatility and relatively low complexity, it is used in the vast majority of vehicles manufactured today. By letting multiple devices communicate with each-other through a common interface, wiring harness complexity can be reduced.

==CAN==
===Electrical Specification===
===Data Format===
===History===
==CAN FD (Flexible Data-Rate)==
===Electrical Specification===
===Data Format===
===History===

Battery Management Systems

2020-05-18T01:51:45Z

LiamKinne: Created page with "==Cell Balancing Methods== ===Active Cell Balancing=== ===Passive Cell Balancing=== ==Safety and Monitoring== As lithium and some other battery chemistries can be quote volati..."

==Cell Balancing Methods==
===Active Cell Balancing===
===Passive Cell Balancing===
==Safety and Monitoring==
As lithium and some other battery chemistries can be quote volatile when outside of their operating range, it is important of a battery management system to be able to sufficiently measure properties like temperature and voltage of individual cells. This data can also be used to feed algorithms that provide insight like state-of-charge estimation.
===Typical Cell Safe Operating Ranges===

{| class="wikitable"
|- style="height: 17.1719px;"
| style="height: 17.1719px;"|Chemistry
| style="height: 17.1719px;"|Min Voltage
| style="height: 17.1719px;"|Max Voltage
| style="height: 17.1719px;"|Discharge Temperature
| style="height: 17.1719px;"|Charge Temperature
|- style="height: 16px;"
| style="height: 16px;"|Li-Po
| style="height: 16px;"|3.0V
| style="height: 16px;"|4.2V
| style="height: 16px;"|10°C ~55°C
| style="height: 16px;"|5°C ~ 45°C
|- style="height: 16px;"
| style="height: 16px;"|LiFePO4
| style="height: 16px;"|3.0V
| style="height: 16px;"|3.6V
| style="height: 16px;"|-20°C ~ 60°C<br />
| style="height: 16px;"|0 ~ 55°C<br />
|}

===Temperature Measurement===
As per FS rules and industry good practice, a significant number of cells should have their temperature measured often to ensure safety preventing such events like thermal runaway from occurring.

Typically this is done by placing a thermistor on the negative terminal of the cell with a thermally conductive, but electrically insulative material in-between for purposes of isolation.
===Voltage Measurement===
To ensure cells are not being over charged or discharged, accurate voltage measurement of each cell is needed. The battery management system only needs to measure each series connected cell as parallel connected cells will always have the same voltage potential.
===<br />===

Communication Protocols

2020-05-17T23:54:45Z

LiamKinne: /* I2C */

==CAN Bus==
{{Main|CAN Bus}}
==I²C==

I²C or Inter-Integrated Circuit is a synchronous communication bus typically used for communication between devices on the same circuit board or in close proximity. Almost all microcontrollers support I²C and many devices such as sensors, displays, real-time-clocks and EERPOMs.

For more information, visit the [https://en.wikipedia.org/wiki/I%C2%B2C I²C Wikipedia page]

==Serial==
===TTL/UART===
===RS232===
===RS422===
===RS485===
==SPI==
[[Category:Electronics]] [[Category:Data Acquisition]]