LMP®: A unique technology

LMP® technology is the result of an ambitious research and development programme started more than twenty years ago. Made of thin films produced using extrusion techniques perfected by the Bolloré Group,

LMP® batteries stand out by their high energy density, safety of use, and performances. Their full solid architecture gives them many advantages in terms of efficiency and safety: they are not affected by high external temperatures and do not need any air conditioning. In addition they are solvent-free and contain no “rare earths” so the risks of local pollution are especially limited in the event of an accident or violation of the battery pack integrity. LMP® batteries are composed of 100% French cells, cobalt-free and bearing the label, Origine France Garantie.

A complex industrial process, perfected and intellectually protected, ready for rapid industrialisation

The fabrication process for the LMP® batteries’ ultrathin films is based on extrusion. Applying the expertise perfected by the Bolloré Group in producing ultrathin films, the process gives Blue Solutions several advantages for industrial production of the batteries and building capacity:

●it’s a clean process with no use of polluting products or solvents during battery manufacture, thereby protecting operators and the environment;

●the fabrication process enables Blue Solutions to produce the battery’s constituent films to a consistently high quality, despite the constraints associated with their thinness;

●the process makes rapid industrialisation possible, because it delivers high production yields.

Blue Solutions has designed and developed the key elements in the batteries’ production chain so as to allow the maximum amount of automation. This automation limits the error risks associated with human intervention. Some items of equipment in the Blue Solutions production chain for batteries have proved so innovative they have themselves led to patent applications.

A battery designed to protect the environment

The LMP® battery contains no solvent, an advantage for environmental protection, making it easier to recycle. For the user, the absence of solvent limits the risk of gas escape or a thermal event involving the battery pack, even at high heat or high power demand.

The LMP® battery contains no rare earth metals, and no cobalt. The batteries are made from copper, aluminium, lithium, polymers, a lithium salt, iron phosphate and carbon – raw materials with a stable supply guaranteed through natural resources.

Battery design allying performance with reliability

The battery’s base cell is a sizeable unit with an energy capacity similar to a traditional car’s lead battery. High capacity means the number of units in each battery can be reduced.

This in turn reduces the number of connections needed between the units. By optimising the size of the units and limiting the number of connections, the cost of the battery has been kept down; but reliability has also increased, especially for on-board applications where environments can be challenging because of vibration or climatic variation.

The internal operating temperature for the LMP® battery is between 60°C and 80°C. The battery’s casing has been very carefully researched and designed to limit the impact of external conditions. So the LMP® battery, with its limited sensitivity to temperature variation (from -20°C to +160°C), gives Blue Solutions a competitive advantage for applications like level-floored electric buses – where the batteries can be mounted on the roof.

R & D on the LMP® battery is continuing to lower its internal operating temperature while increasing its autonomy.