Preparation of the new target cell

20 Dec. 2007H. Kanda

Idea sketch of new cells

films on the flanges thin cap on the bothend of the cylindrical cell

thick cylindrical capson both sides of the cell

Type 1 Type 2 Type 3

How to form the cap-shaped films?

1. Thermal polymerization of Polyimide varnish: Ube-Industory U-Varnish-S

1. E=9 GPa, max= 500 MPa for 25 um film2. High glass-transition temperature (>500 degC) -> difficulty of th

e heat press3. Thickness controllable

2. Heat press of aramid film: Toray Mictron1. E=10GPa, max= 480 MPa for 12 um film2. lower glass-transition temperature (~270 degC) than polyimide

-> possibility of the heat press3. Thickness < 20 um

3. Heat press of PET for cylindrical part and cap for type-3 cell?

Polimerization of U-Varnish• High temperature oven (T>500 degC) is needed... not available in Science F

aculty of Tohoku Univ. Now I search for it in other facilities and consult to Advantec Corp.

• Evaporation of salt (NaCl) on the metal mold may be needed. SSPNS group in Department of Physics own the evaporator.

• Solvent of the varnish (n-Methyl-2-pyrrolidone) is flammable... is it possible to handle it in the higher temperature than the combustion point??

• Now I consult to the Dr. Ishikawa of JAXA and Prof. Ishikawa of Department of polymer science and engineering, Yamagata Univ.

Heat press of aramid film• Toray changed their attitude completely as compared to

5 years ago and they willingly supply some sample films for their aramid film: Mictron.

• The surface of Mictron can be treated with the corona-discharge and it increases the adhesiveness.

• Matsumoto Co. Ltd., the company with heat press technology of PET, is now trying to test the heat press of the aramid films.

• For the formation of the PET cylinder, Matsumoto Co. Ltd. is one choice of the company to order it.

Measurement of the shape of the cell

• Because the shape and structure of the cell will be completely changed, its shape should be carefully measured.

• Not only for the measurement of the shape of our cell, a general purpose shape measuring machine should be useful for our experiments.

• 1-dimensional probe + 2-dimensional movement– rental sensors available (<100,000 Yen/month)– automatic motion control is needed (~500,000 Yen)

• 2-dimensional probe + linear movement– no rental sensor available– expensive (>1,400,000 Yen)– simple motion -> manual motion is sufficient (<100,000 Yen)

Multi-purpose form measuring machine

• By exchanging the 1-dimensional sensor, the optimum dynamic range and precision are obtained.

• Changeableness to the possessing sensor (Keyence LC-2440) is important.

• Coms Corp. sells this kind of order-made measuring machine (right figures).

• Can a hand-made measuring machine be developed with reference to this machine? For our purpose, sensor should be moved by an automatic motion controller.