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Superior Battery Technology
Lithium-based batteries are the technology of choice for electric mobility applications. They store significantly more energy than all other batteries, they maintain a high current – a major advantage for electric drive systems – they do not lose their charging capacity, they supply power reliably even in the cold and have no memory effect. Theyalso provide many more cycles than lead-based batteries.
Torqeedo has been a pioneer in the de- velopment of lithium batteries for marine applications for more than a decade. Since we make our batteries just a little bit better each year, we offer the most comprehen- sive and integrated protection and safety concept for lithium batteries on the market – coupled with performance and convenience.
- High energy density
- Long service life
- Robust
- Highest quality and safety standards
High Capacity Deep Blue Batteries with BMW i Technology
Cooperation between BMW i and Torqeedo has made state-of-the-art automotive battery engineering available for the marine market. The battery technology introduced in the BMW i3 and optimized with a smaller footprint for the BMW i8 can now power your Torqeedo drive.
Deep Blue Battery BMW i3
Nominal voltage: 360 V
Capacity: 30.5 kWh
Weight: 256 kg
Dimensions: 1660 x 964 x 174 mm
Lithium Battery Safety
Besides performance, safety plays an important role for lithium batteries. In our view, this factors need to be considered in order to ensure that safe really means safe:
Battery management system (BMS) with redundant safety features: unlike lead-based batteries, lithium batteries always need a BMS to perform balancing and safety functions. If electronic components of the BMS fail it can itself become a safety problem for the battery. That’s why there is hardware backup for all safety-relevant components in Torqeedo batteries. Incidentally, this is also stipulated in the automotive industry, in aerospace and for medical technology.
Safe, individual cell packaging: Torqeedo only uses safety cells – welded steel cylinders each of which is equipped with multiple hardware safety mechanisms. Other forms of packaging such as foil-sealed cells (“coffee bags”) offer a lower standard of safety as they afford less effective protection against internal short circuiting within the cells. (An exception here are cells with ceramic separators, which also provide safe packaging, but these are extremely expensive and very seldom used.)
Clean, precision production processes on the part of the cell manufacturers. Torqeedo only uses cells sourced from reputable manufacturers in Japan and the USA.
Waterproof to IP67: Water in lithium batteries can lead to various problems such as corrosion of the BMS hardware or the creation of electrolytic gas. Lithium batteries on board a boat should therefore be waterproof.
Safe battery chemical engineering, e.g. LiFePo (lithium iron phosphate) or LiNMC (lithium nickel manganese cobalt oxide). These are now widely used.
