Ngk Insulators, Inc.

Kenji Kawamura

Kenshin Kitoh

Toshihiro Yoshida

Akio Enomoto

Hiroshi Nemoto

Shinji Otsubo

Naohito Yamada

Yuichi Gonda

Kazumasa Yashiro

The present invention provides a sequential and efficient method of assembling a battery with a desired number of layers while reliably separating positive and negative electrode sides from each other with one or more separator structures. According to the invention, the method of assembling a battery includes stacking one or multiple combinations each comprising a frame and a positive electrode plate to be disposed in a region defined by the frame and one or multiple combinations each comprising a frame and a negative electrode plate to be disposed in a region defined by the frame, once or alternately, such that the positive and adjacent negative electrode plates are separated from each other by a separator structure and the periphery of the separator structure is held between the adjacent frames. The separator structure includes a separator exhibiting hydroxide ion conductivity and water impermeability.

Battery and assembly method therefor

A lithium secondary cell includes an internal electrode body having a positive electrode plate and a negative electrode plate wound and laminated around an external peripheral wall of a hollow cylindrical winding core. The inside of the internal electrode body is impregnated with a nonaqueous electrolyte solution. A cylindrical cell case houses the internal electrode body and has open ends sealed with plate member electrode caps. An external terminal member protrudes onto the surface of the electrode caps to lead current to the outside of the cell case, and an internal terminal member connects with the internal electrode body to take current from the internal electrode body. An elastic body and at least two of the plate member, the external terminal member and the internal terminal member are joined together for construction. An assembly of lithium secondary cells is also disclosed.

Lithium secondary cell and assembly thereof

The invention provides a lithium secondary cell including an inner electrode body impregnated with a non-aqueous electrolyte, made up of a positive electrode and a negative electrode each made of at least one metallic foil wound or laminated together and collectors to lead out a current from this inner electrode body. The edges of the metallic foil of the positive electrode and/or the negative electrode and predetermined parts of the positive electrode collector and/or negative electrode collector are joined together to lead out a current from the inner electrode body. The edges of the metallic foil, the edges (joint edges) arranged to be joined to the predetermined parts of the positive electrode collector and/or the negative electrode collector and the predetermined parts of the positive electrode collector and/or the negative electrode collector are joined together. The lithium secondary cell has excellent productivity and space-saving capability.

Lithium secondary cell

A lithium secondary batteryis provided with an inner electrode bodycomprising a positive electrode plate and a negative electrode plate respectively made up of at least one metal foilwound or laminated; said inner electrode body being impregnated with a non-aqueous electrolyte, current collector membersA andB for leading a current out of this inner electrode bodya battery casewith both ends left open; said battery case housing the inner electrode bodyand two capsprovided with internal terminalsA andB thereon; said caps being used to seal the inner electrode bodyat both open ends of the batteryBy adopting such a configuration that positive and negative external terminals are placed on one end of a battery collectively, protrusions of the battery are so reduced that the collective coupling of batteries becomes easier.

Lithium secondary battery and assembled structure of lithium secondary batteries

A lithium secondary battery comprises an internal electrode body formed by winding a positive electrode and a negative electrode on an outer peripheral wall of a hollow winding core, nonaqueous electrolyte solution contained in the case, a cylindrical battery case containing this internal electrode body inside, at least one electrode cap sealing the internal electrode body, and at least one pressure release hole in a position corresponding with the center axis of the winding core.

Lithium secondary battery and manufacturing method thereof

A lithium secondary battery includes a cylindrical battery case provided with electrode caps at both end portions thereof. An electrode body impregnated with a nonaqueous electrolyte solution is contained in the battery case and includes a positive electrode, a negative electrode, and a separator, with the positive electrode and the negative electrode being wound or laminated through the separator. An elastic body is disposed between the battery case and the electrode caps, with portions in which the battery case contacts the elastic body being brought into press-contact to form a caulked portion to seal the battery case. R(mm) is a diameter of a body part of the battery case and R(mm) is a diameter of the caulked portion, wherein Rand Rfulfill a relationship of R&#x3e;R.

A lithium secondary battery has an internal electrode body formed by winding a positive electrode and a negative electrode on an outer peripheral wall of a hollow winding core and filled with nonaqueous electrolyte solution, a cylindrical battery case containing this internal electrode body 1 inside with its both ends being open, and electrode caps which each have a battery cap, an internal terminal, and an external terminal, the internal electrode body being sealed by the electrode caps at both open ends of the battery case. At least one of the electrode caps has a pressure release hole in a position corresponding with the center axis of the winding core.

To provide a lithium secondary cell, which is excellent in productivity since a cell structure is simple and easy for assembly. Provided is a lithium secondary cell having: an internal electrode body including a positive electrode plate, a negative electrode plate, the positive electrode plate and the negative electrode plate being wound and laminated around an external periphery wall of a hollow cylindrical winding core, and inside the internal electrode body a nonaqueous electrolyte solution being impregnated, a cylindrical cell case contained in this internal electrode bodywith both ends being opened, and two electrode caps sealing the above described internal electrode bodyat both the open ends of this cell case. The electrode cap has a plate member sealing the internal electrode body and disposed so as to seal both the open ends of the above described cell case, an external terminal member protruding onto the surface of the electrode caps to lead out currents to outside, and an internal terminal member brought into connection with the internal electrode body and taking out currents from the internal electrode body, and an elastic body and at least two of the above described plate member, the external terminal member and the internal terminal member are joined together for construction. Furthermore, there is also provided an assembly of lithium secondary cells.

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Nagoya, Japan

Kenji Kawamura