Measure cell temperature for the battery management system.
Built into the ENEPAQ submodules at the negative terminal, as EV.8.5.3 and 8.5.4 require. The rules require a minimum of 20% of cells monitored and equally distributed; the team's intent is every cell.
No part-specific design process is documented. The Accumulator LV subsystem design process applies: 1. List every low voltage function inside the container and what it must interface with. 2. Decide grounding architecture (star chosen) and lay out the returns. 3. Design the boards, with conformal coating selected against the requirement (acrylic is easier to rework, silicone is more vibration resistant and more temperature tolerant but costs more and is harder to remove). 4. Design HV monitoring: optocoupler (smaller, cheaper, digital, needs conformal coating) against voltage transducer (no conformal coating needed, larger, more expensive, analog). 5. Build the sub-harnesses, test in simulated conditions before the pack is live.
Purchased.
Purchased unit. From the cost report drawings and CAD: From the cost report drawings: Stainless Steel (Thermistor Bung).
Temperature sensing connectors are bulky and difficult to separate. Fuse boards for temperature sensing are an open investigation.
Dimensions called out on the cost report drawings. These are the figures printed on the drawing, not a labelled specification; open the drawing itself for what each one refers to. Thermistor Bung (as drawn): 15.43, 7.93, 2.77, 11.32, 3.30, 8.74, 10.29 Quantity on the drawing: 4. Source: Cost report drawings: CR22/Powertrain/Design/Manifolds/Exhaust/CR22a/4 - Documentation/Cost Report Drawings/Thermistor Bung.pdf Quantity per car, as costed: 1
Nothing in CrimsonStorage covers these yet.