Battery
AssigneeSanyo Electric Co., Ltd.
InventorRyoichi Wakimoto
Life of this patent
Estimating the term…
Abstract
A battery includes an electrode body obtained by stacking a positive electrode plate and a negative electrode plate with a separator interposed therebetween, an exterior body having an opening and housing the electrode body, a sealing plate sealing the opening, and an external terminal attached to the sealing plate. A tab is provided at at least one of the positive electrode plate or the negative electrode plate, and is electrically connected to the external terminal via a current collector between the electrode body and the sealing plate. The tab is welded to the current collector. A covering member covers a welding point between the tab and the current collector.
Claims11
A battery comprising:
- an electrode body obtained by stacking a positive electrode plate and a negative electrode plate with a separator interposed therebetween;
- an exterior body having an opening and housing the electrode body;
- a sealing plate sealing the opening;
- and
- an external terminal attached to the sealing plate, wherein:
- a tab is provided at at least one of the positive electrode plate or the negative electrode plate and being electrically connected to the external terminal via a current collector between the electrode body and the sealing plate,
- the tab is welded to the current collector,
- a covering member including a plastic film is bonded to a welding point between the tab and the current collector, by an adhesive,
- the tab is disposed between the current collector and the covering member, and
- the covering member has a portion that bends away from the current collector.
A battery comprising:
- an electrode body including a first electrode body element and a second electrode body element, each including a positive electrode plate and a negative electrode plate;
- an exterior body having an opening and housing the electrode body;
- a sealing plate sealing the opening;
- an external terminal attached to the sealing plate;
- a first tab coupled to one of the positive electrode plate or the negative electrode plate of the first electrode body element and electrically connected to the external terminal via a current collector disposed between the electrode body and the sealing plate;
- a second tab coupled to one of the positive electrode plate or the negative electrode plate of the second electrode body element and electrically connected to the external terminal via the current collector disposed between the electrode body and the sealing plate;
- and
- a covering member covering a first welding point between the first tab and the current collector and a second welding point between the second tab and the current collector, wherein:
- the first tab is welded, at the first welding point, to a first side portion of the current collector and the second tab group is welded, at the second welding point, to a second side portion of the current collector opposite to the first side portion,
- the covering member has a first portion contacting the first welding point, a second portion contacting the second welding point, and a third portion disposed between the first portion and the second portion and covering an area between the first welding point and the second welding point,
- the covering member has bent portions such that the first and second portion are located closer to the current collector than the third portion,
- the covering member includes a plastic film having an adhesive and is disposed between the current collector and the sealing plate, and
- the first tab and the second tab are disposed between the current collector and the covering member.
Dependencies are inferred from the claim text.