Automotive Energy Supply Corporation

Nissan Motor Company Limited

Advanced Lcd Technologies Development Center Co., Ltd.

Daisuke Iga

Chika Amemiya

Shinichi Tasaki

Takeshi Yasooka

Yukio Taniguchi

Hiroaki Tanizaki

Hiroshi Ishikawa

Kenichi Sakai

Tomoyuki Nagaoka

Junko Kurihara

Asako Kawashima

A test method for a secondary battery, which early detects the occurrence of the future micro short-circuiting in the screening and promotes to render the contaminant harmless while suppressing the short-circuiting between the positive and negative electrodes in the aging, is provided. This test method includes Step Sof charging the secondary battery, Steps Sand Sof aging the secondary battery in a first pressed state, Step Sof measuring a battery voltage (V) after the aging, Step Sof screening the secondary battery in a second pressed state with a higher pressure than in the first pressed state, and Step Sof measuring a battery voltage (V) after the screening. Whether the battery has the internal short-circuiting or not is determined (Step S) based on the difference between the voltage (V) measured in Step Sand the voltage (V) measured in Step S

Test method for secondary battery

A method for producing cell, which includes cell elementwherein positive electrode plateand negative electrode plateare laminated with an interposal of separatortherebetween; and outer casewhich houses cell elementtogether with an electrolyte solution. An electrolyte solution injection step for forming cellby having outer casecontain cell elementand electrolyte solution (step S), a charging step for charging cell(step S), and an impregnation condition inspection step for inspecting an impregnation condition of the electrolyte solution into cell elementafter charging cellare conducted in the order of the electrolyte solution injection step, the charging step and the impregnation condition inspection step.

Method for producing cell including electrolyte impregnation inspection and pressurization

According to the present invention, there is provided a seal step (ST) storing an electrode laminate in which a separator is disposed between a positive electrode and a negative electrode and an electrolyte within an exterior body constituted by a laminate film and sealing the exterior body; a pressure application step (ST) of applying a pressure to the exterior body in which the electrode laminate is stored by means of a flat plate press working or so forth; charge step (ST) of charging up to a full charge; a gas removal step (ST) of unsealing the exterior body and removing gas generated within the exterior body at the charge step; and a re-seal step (ST) of sealing the exterior body after the gas removal step. The number of times of the gas removal steps is small and an influence of gas on battery characteristics is suppressed.

Production method for non-aqueous electrolyte secondary battery

A method of forming a polycrystalline semiconductor film, which includes irradiating an amorphous semiconductor film formed on an insulating substrate with light to convert the amorphous semiconductor into a polycrystalline semiconductor with laterally grown crystal grains, thus forming a polycrystalline semiconductor film, wherein crystal growth in the semiconductor is controlled such that first crystal grains laterally grow in the first direction along a X-axis from the first group of initial nuclei, the second crystal grains laterally grow in the second direction opposite to the first direction along the X-axis from the second group of initial nuclei arranged apart from the first group of initial nuclei along the X-axis, and the first crystal grains collide against the second crystal grains at different points in time along a Y-axis.

Method of forming polycrystalline semiconductor film

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Chofu, Japan

Daisuke Iga