Overview
In recent years, lithium-ion battery technologies develop very quickly, but the corresponding thermal management technology is not much progress, the problem of battery pack internal cooling / heating has not been solved effectively. Most of the liquid cooling battery pack in EV adopts a cool plate，attached at bottom of module, cooling edge of cell via the thermal conductive silica gel. Because the contact area is small, the heat conduction distance is long, the cooling efficiency is not high.
Energeia Labs has developed a novel liquid-cooling / heating battery pack, which coolant loops are 3-D integrated into enclosure grid structure.
Our coolant loops are 3-D integrated into enclosure grid structure which allows each individual cell to have a large surface to come in contact with MPT (micro port tubes) where coolant / air flow in. The contact area is large, the heat conduction distance is short, so the heat transfer efficiency is high.It ensures each battery cell’s large surface is cooled or heated quickly, uniformly and effectively, additionally ensuring greater temperature uniformity.
This design is flexible for both liquid cool and air cool solution. We can easily remove the coolant chamber cover, let the air flow through MPT to cool down battery cell evenly. Both two options are IP67 water prove for cells, which prevent moisture to corrode cell tab where in most air cool solution faced (e.g. in ESS).
These MPT are not only serves as cooling duct plates, they also support cells and constitute a grid structure for the battery pack.
Due to using continuous atmospheric brazing process (CAB), this aluminium alloy enclosure can be manufactured with consistent quality at low costs for mass production. The weight is reduced, but the strength and structural integrity is significantly improved.
The overall battery packs are compact and solid owing to no wastage of space. So the energy density is higher.
This structure is suitable for both module level and pack level. For pack level application, the module frame and support are no longer required, thereby reducing the number of parts, reducing the cost, allowing for greater convenience for assembly、maintenance and replacement of a single cell. Two cells as a group is installed in a cooling grid, so can get a uniform compression and cooling of the cell.
