Sony Corporation

Goro Shibamoto

Shuji Goto

Hiroyuki Akashi

Shigeru Fujita

Mashio Shibuya

Momoe Adachi

Tsuyonobu Hatazawa

Osamu Ishii

Tomitaro Hara

Takuya Endo

Yasunobu Iwakoshi

Kazumi Izumitani

Koji Hayasaka

An antenna module in which an antenna coil formed of a metal foil and a condenser are formed on an insulating substrate, the antenna module includes: a control circuit configured to control communications done by the antenna coil, the control circuit disposed on the insulating substrate; and a pattern formed of a metal foil, wherein the pattern is formed on the insulating substrate on the opposite side of the control circuit through the insulating substrate, and the control circuit has: a detecting means for detecting a temperature of the control circuit, and a control means for terminating the communications when a temperature of the control circuit is equal to or above a predetermined temperature.

Antenna module

A solid electrolyte battery incorporating a positive electrode with an elongated positive-electrode collector having two sides on which positive-electrode active material layers are formed, a negative electrode with an elongated negative-electrode collector having two sides on which negative-electrode active material layers are formed, and a solid electrolyte layer formed between the positive electrode and the negative electrode such that the positive electrode and the negative electrode are laminated and wound. A ratio A/B of the total film thickness A of the positive-electrode active material layers with respect to the total thickness B of the negative-electrode active material layers satisfies a range from 0.5 to 1.2.

Solid electrolyte battery

A solid electrolyte battery h which includes a wound electrode incorporating a positive electrode with a two-sided elongated positive-electrode collector on which positive-electrode active material layers are formed, a two sided negative electrode with an elongated negative-electrode collector on which negative-electrode active material layers are formed and a solid electrolyte layer formed between the positive and the negative electrodes where, the total film thickness of the positive-electrode active material layers satisfies a range from 60 &#x3bc;m to 150 &#x3bc;m, and the ratio A/B of the total film thickness A of the positive electrode active material layers with respect to the total thickness B of the negative-electrode active material layers satisfies a range from 0.5 to 1.2.

A battery with a high battery voltage at charging and improved energy density is provided. A cathode () and an anode () are laminated with a separator () sandwiched therebetween which is impregnated with an electrolyte. The cathode () has a cathode active material including a lithium composite oxide which contains lithium, at least either cobalt or nickel, and oxygen. The battery voltage at charging is 4.25 V or more. The total amount of lithium carbonate and lithium sulphate in the cathode () to the cathode active material is 1.0 wt % or less, a concentration of protic impurities in the electrolyte, which is converted to a mass ratio of protons to the electrolyte, is 20 ppm or less, or moisture content in the electrolyte is 20 ppm mass ratio or less to the electrolyte. This inhibits metal eluting from the lithium composite oxide even at high voltages.

Battery

A solid electrolyte battery is disclosed incorporating a wound electrode having a positive electrode with a collector having two sides on which positive-electrode active material layers are formed, a negative electrode with a collector having two sides on which negative-electrode active material layers are formed, and a solid electrolyte layer formed between the positive electrode and the negative electrode, wherein a total film thickness A of the positive-electrode active material layers satisfies a range from 60 mm to 150 mm and a ratio A/B of the total film thickness A of the positive-electrode active material layers with respect to a total thickness B of the negative-electrode active material layers satisfies a range from 0.5 to 1.2.

A method for making a combination IC card comprising the steps of forming antenna leads and patterned connection leads, forming a hole for mounting an external electrode chip on a sheath on at least one side of the antenna substrate, mounting an IC chip on the antenna substrate having the antenna leads and the patterned connection leads, mounting the external electrode chip on the antenna substrate having the antenna leads and the patterned connection leads, and attaching the sheath having the hole on the antenna substrate.

Method for making IC card

A solid electrolyte battery is disclosed incorporating a wound electrode having a positive electrode with a collector having two sides on which positive-electrode active material layers are formed, a negative electrode with a collector having two sides on which negative-electrode active material layers are formed, and a solid electrolyte layer formed between the positive electrode and the negative electrode, wherein a total film thickness A of the positive-electrode active material layers satisfies a range from 60 mm to 150 mm, and a ratio A/B of the total film thickness A of the positive-electrode active material layers with respect to a total thickness B of the negative-electrode active material layers satisfies a range from 0.5 to 1.2.

A solid electrolyte battery is disclosed incorporating a wound electrode having a positive electrode with a collector having two sides on which positive-electrode active material layers are formed, a negative electrode with a collector having two sides on which negative-electrode active material layers are formed, and a solid electrolyte layer formed between the positive electrode and the negative electrode a total film thickness A of the positive-electrode active material layers satisfies a range from 60 mm to 150 mm, and a ratio A/B of the total film thickness A of the positive-electrode active material layers with respect to a total thickness B of the negative-electrode active material layers satisfies a range from 0.5 to 1.2.

A positive electrode has a strip electrode collector whose both sides are coated with a positive electrode active material layer and a negative electrode has a strip negative electrode collector whose both sides are coated with a negative electrode active material layer. The positive electrode and the negative electrode are layered via a solid electrolyte layer and rolled in the longitudinal direction into a rolled electrode body of a cell. The electrodes have a collector one-side exposed portion at their one end in the longitudinal direction to be positioned at the outermost circumference and the collector one-side exposed portion covers the outer circumference of the rolled electrode body by one more. This configuration can minimize a damage which may be caused when the cell is pushed to be collapsed.

Solid electrolyte cell having a rolled electrolyte body

A solid electrolyte battery is disclosed which is capable of raising an energy density without deterioration of discharge load characteristics thereof, incorporating a wound electrode incorporating a positive electrode incorporating an elongated positive-electrode collector having two sides on which positive-electrode active material layers are formed, a negative electrode incorporating an elongated negative-electrode collector having two sides on which negative-electrode active material layers are formed and a solid electrolyte layer formed between the positive electrode and the negative electrode such that the positive electrode and the negative electrode are laminated and wound, wherein when an assumption is made that the total thickness of a pair of the positive-electrode active material layers formed on the two sides of the collector for the positive electrode is total film thickness A and the total thickness of a pair of the negative-electrode active material layers formed on the two sides of the collector for the negative electrode is total thickness B, the total film thickness A of the positive-electrode active material layers satisfies a range from 60 &mgr;m to 150 &mgr;m, and ratio A/B of the total film thickness A of the positive-electrode active material layers with respect to the total thickness B of the negative-electrode active material layers satisfies a range from 0.5 to 1.2.

The present invention provides a gel electrolyte cell including a non-aqueous electrolytic solution containing lithium-containing electrolyte salt solved in a non-aqueous solvent and made into a gel state by a matrix polymer, and the gel electrolyte contains vinylene carbonate or derivative thereof in the amount not less than 0.05 wt % and not greater than 5 wt %. This gel electrolyte exhibits an excellent chemical stability with the negative electrode, strength, and liquid-retention characteristic. This gel electrolyte enables to obtain a gel electrolyte cell satisfying the cell capacity, cycle characteristic, load characteristic, and low-temperature characteristic.

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Miyagi, Japan

Goro Shibamoto