1. Physical Battery

Image of Capacitor

Capacitor storages electric energy based on adsorption/desorption of ion-molecules to/from electrodes surface. Rechargeable battery (Secondly battery) based on chemical reaction (e.g. oxidation-reduction). So, rechargeable battery deteriorate rapidly by iteration charge/discharge, high temperature and high rate (high electric current). In principle, Capacitor is not degenerate because of physical reaction.

2. Advantage

Comparison of Rechargeable and Capacitor

Image of Capacitor
  1. Rapid charge/discharge (really intense with no degenerate).
  2. Long service life (charge/discharge times up to a million times).
  3. Wide temp. range (-40 deg. C to 70 deg. C or more).
  4. Low environment load (no heavy metals).
  5. Safety (electrode short and prick of EDLC are not cause of fire accident),

Capacitance error of each cells

Despite being manufactured with the latest production technology, each cell has a very large capacity error.

Therefore, a cell with a small capacity first becomes fully charged, and the overcharged state is reached.

Normally, this is solved by the equalization circuit, which causes efficiency reduction and heat generation

Difficulty of deep discharge

Output voltage of capacitor is not constant. The voltage is shifted in proportion to charge amount in the cell.

Since the input width of the power converter at the subsequent stage is limited, this characteristic makes deep discharge difficult.

Both of cell balancing and deep DOD are realized.


Difference between conventional technology and new technology

Need both of bank switching and equalization circuit.

No equalization circuit required.

Comparison of convenctional and our technology.


Large Scale Storage

  • Unlimit capacitance for a module
  • Unlimit connection number of modules
  • Available MWh or more

Super rapid charge with small power

  • In minutes, In seconds charge
  • Nearly 100% DOD and efficiency
  • Charging sorce household outlet