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Hi,
Over the past year, we at EVDrive have been working on a new design for packaging 18650s into usable modules. We think this design has a number of advantages. Our modules have the following features:
--Maximum packaging density
--Cells are interconnected with Copper (over 4x less resistivity than commonly used Nickel 200)
--Integrated BMS: No high voltage wires exiting the module, only 12V power and CAN communication
--Module is potted with thermally conductive encapsulant for ease of cooling and mechanical robustness
--Any 18650 or 21700 cells can be used, so the pack can be optimized for power, capacity, cycle life, etc.
--Over 1kV isolation from cells to case, so that high voltage packs can be constructed without any troubles.
We just shipped out the first test module using our new design for a Go-kart project, as can be seen below. This particular module had the following specs:
--43.2V nominal (12S)
--54Ah
--2.33 kWh
--675A peak, 275A continuous without cooling, 450A continuous with liquid cooling
--Dimensions of 205 x 355 x 75 mm
--Mass of 12 kg
As you would expect, our modules are more expensive than Tesla packs from salvage yards. However, they provide flexibility that you may need, as they can be arranged into many more sizes, shapes and capacities. Also by using high power 18650s, they can provide far more power than a Tesla pack, if this is needed. As time goes by, we will be adding more "standard" modules into our library for ordering, but we have designed our process to be able to be customized easily and with minimal NRE costs. So, if you have a specific need, let us know and we can design just what you need.
Over the past year, we at EVDrive have been working on a new design for packaging 18650s into usable modules. We think this design has a number of advantages. Our modules have the following features:
--Maximum packaging density
--Cells are interconnected with Copper (over 4x less resistivity than commonly used Nickel 200)
--Integrated BMS: No high voltage wires exiting the module, only 12V power and CAN communication
--Module is potted with thermally conductive encapsulant for ease of cooling and mechanical robustness
--Any 18650 or 21700 cells can be used, so the pack can be optimized for power, capacity, cycle life, etc.
--Over 1kV isolation from cells to case, so that high voltage packs can be constructed without any troubles.
We just shipped out the first test module using our new design for a Go-kart project, as can be seen below. This particular module had the following specs:
--43.2V nominal (12S)
--54Ah
--2.33 kWh
--675A peak, 275A continuous without cooling, 450A continuous with liquid cooling
--Dimensions of 205 x 355 x 75 mm
--Mass of 12 kg
As you would expect, our modules are more expensive than Tesla packs from salvage yards. However, they provide flexibility that you may need, as they can be arranged into many more sizes, shapes and capacities. Also by using high power 18650s, they can provide far more power than a Tesla pack, if this is needed. As time goes by, we will be adding more "standard" modules into our library for ordering, but we have designed our process to be able to be customized easily and with minimal NRE costs. So, if you have a specific need, let us know and we can design just what you need.
