On-board power supply on motorboats often requires compromises between available space and required capacity. Liontron addresses precisely this problem with the new Slim-Line series. The extremely flat lithium iron phosphate batteries measure just 6.7 centimetres in height and therefore fit into storage spaces that are too low for conventional batteries.
Lithium batteries with lots of energy and low installation height
The Slim-Line series comprises two models with 125 and 210 ampere hours at a nominal voltage of 12 volts. This corresponds to a usable energy quantity of 1,500 and 2,520 watt hours respectively - significantly more than comparable AGM batteries of the same size can offer. The batteries are based on round cell technology, which enables installation in any position. This means that the Slim-Line batteries can be installed in any position.
This considerably expands the installation options and allows creative solutions in confined spaces. The batteries can be installed under seats, in flat floor compartments or behind panelling. Practical cut-outs in the housing ensure that the connection poles remain easily accessible and cables can be neatly routed out - even when the installation is stacked.
No overheating
A decisive advantage of the round cells used is their heat dissipation behaviour. The cylindrical shape offers a larger surface area in relation to the volume than prismatic cells. This leads to better cooling and reduces the risk of overheating, which is particularly important in cramped installations with limited air circulation.
The batteries have an integrated battery management system (BMS) that prevents overcharging, deep discharging and short circuits. It also monitors the temperature of each individual cell. In the event of extreme temperatures or other critical conditions, the BMS automatically switches off the battery to prevent damage. The batteries are also waterproof to IP67.
Simply stackable
The Slim-Line batteries are easy to install. With a weight of 14.5 kg (125 Ah) and 22.5 kg (210 Ah), they are around 60 per cent lighter than comparable lead-acid batteries. This not only makes installation easier, but also noticeably reduces the overall weight on board.
The batteries have a Bluetooth interface that enables monitoring via a smartphone app. On-board voltage, charging and discharging current and remaining capacity can be conveniently read at any time. This eliminates the need for a separate battery monitor, which saves costs and reduces installation work.
Long service life of the lithium batteries
With a guaranteed cycle stability of 3,000 charge-discharge cycles at 80 per cent depth of discharge, the Slim-Line batteries outperform conventional lead-acid batteries by a factor of six to eight. With typical seasonal use on a sailing yacht, this corresponds to a service life of 10 to 15 years. The usable capacity is 100 per cent - in contrast to lead-acid batteries, where in practice often only 50 per cent of the nominal capacity can be used to prevent damage due to deep discharge. This effectively doubles the available energy with the same nominal value. Prices have not yet been finalised.
