NiMH

Because of its high rate capability and long cycle life, NiMH has been the chemistry of choice for portable electronics and hybrid electric transportation. However, battery suppliers have used this chemistry with conventional cylindrical coiled electrode and flat plate prismatic designs, adding considerably to the battery’s weight, volume, and cost.

Electro Energy’s wafer cell bipolar battery design, using NiMH, overcomes the limitations of these cell structures. Wafer cells are stacked one on top of another to create multi-cell batteries of virtually any shape, energy capacity, and voltage for a specific application.

One of the biggest advantages of Electro Energy’s NiMH technology is its design flexibility. The single cells can be arranged in such a way that a different end-user specified configurations could easily be achieved. Such customized design can equally offer battery solutions for EV, HEV, and PHEV applications where different volumetric and gravimetric restrictions could be met.

Advantages of the Wafer Cell NiMH Bipolar battery include:

Each cell individually sealed
Eliminates stray currents and electrolyte leakage.

No external cell terminals
Electrode electrical contacts are part of the surface of the flat cell, eliminating the additional volume from external current collectors.

Effective thermal management resulting in uniform cell-to-cell temperature
Heat is removed through the edges of the cells. Design is also adaptable to heat transfer fins for large area, high capacity cells.

Compatible with multiple electrode production processes
Automated flexible manufacturing/lower manufacturing costs.

Cell/stack control and balancing electronics
Enables drop-in replacement for existing batteries.

Improved energy and power density
Wafer cell bipolar results improves on traditional NiMH specifications.

Environmentally friendly
NiMH is a “Green Technology.”