Assembly, Geometry and Material Properties of the Battery Box
- Kimberly Liu
This section summarizes the components in a Battery Module → Battery Module Manufacturing
CAD for Single Module → https://workbench.grabcad.com/workbench/projects/gcwijX10VhtEeZ8mtyGdmiV5BQItzO7K-9PXmyIs5vRPFL#/file/532457176
CAD for Battery Box → https://workbench.grabcad.com/workbench/projects/gcwijX10VhtEeZ8mtyGdmiV5BQItzO7K-9PXmyIs5vRPFL#/file/532457142
This page summarizes materials used in the battery box and their associated thermal characteristics → Specific Heat Capacity of the Battery Pack
Since the thermal conductivities of acetal, fish paper, PETG and air are much less than the 18650s, Nickel and EMS Sigma 60 (see table below), they are neglected in calculations.
It was calculated that the average specific heat capacity of a module is 35.5 kJ/ deg C.
The components and materials are also summarized below:
Component | Material | Thermal Conductivity (W/ m K) | Specific Heat Capacity (J/kg K) | Mass (kg) |
|---|---|---|---|---|
 Battery Cells | LG MJ1 18650 | assume uniform temp within 18650s | 830 | 41.5 (48 g* 864 cells) |
Nickel | 90 | 440 | 0.8 | |
EMS Sigma 60 (copper, nickel, steel) | 200 | 400 | 1.54 | |
Acetal | 0.3-0.37 | 1400-1500 | - | |
Fish Paper | 0.29 | 1687 | - | |
+ other 3D printed components | PETG | 0.29 | 1200 | - |
| Air | 0.025 | 1005 | - |
