According to one embodiment, a battery includes an electrode group, a tab, a conductive nipping member, a case, a lid and a lead. The conductive nipping member includes first and second nipping sections. The first and second nipping sections divide the tab into two bundles in which portions of the t
According to one embodiment, a battery includes an electrode group, a tab, a conductive nipping member, a case, a lid and a lead. The conductive nipping member includes first and second nipping sections. The first and second nipping sections divide the tab into two bundles in which portions of the tab are laminated onto each other in a thickness direction of the electrode group. The lead includes a connecting section connected electrically to a terminal, and current collecting sections which are two sections branched from the connecting section and sandwiching the nipping member.
대표청구항▼
1. A battery comprising: an electrode group in which a positive electrode and a negative electrode are wound into a flat form with a separator interposed therebetween, the positive electrode comprising a positive electrode current collector, and the negative electrode comprising a negative electrode
1. A battery comprising: an electrode group in which a positive electrode and a negative electrode are wound into a flat form with a separator interposed therebetween, the positive electrode comprising a positive electrode current collector, and the negative electrode comprising a negative electrode current collector;a positive electrode tab which is a section of the positive electrode current collector projected in a spiral form from one end face in a winding axis direction of the electrode group;a negative electrode tab which is a section of the negative electrode current collector projected in a spiral form from another end face in the winding axis direction of the electrode group;a case in which the electrode group is stored;a lid provided to an opening in the case and comprising a positive electrode terminal and a negative electrode terminal;a positive electrode lead comprising,a connecting section of the positive electrode lead electrically connected to the positive electrode terminal, andcurrent collecting sections which are two sections branched from the connecting section, extending along a direction perpendicular to the winding axis direction and sandwiching the positive electrode tab, one of the two sections being electrically connected to the positive electrode tab, another section being electrically connected to the positive electrode tab;a negative electrode lead comprisinga connecting section of the negative electrode lead electrically connected to the negative electrode terminal, andcurrent collecting sections which are two sections branched from the connecting section, extending along the direction perpendicular to the winding axis direction and sandwiching the negative electrode tab, one of the two sections being electrically connected to the negative electrode tab, another section being electrically connected to the negative electrode tab;an insulating tape which is arranged on an outermost circumference of the electrode group;a first insulating cover comprising a resin molded product having a shape which covers areas of the positive electrode lead and the positive electrode tab which are areas opposed to an inside surface of the case, the first insulating cover comprising an opening, a side plate covering an end face of the positive electrode tab, and a side plate curved into a U-shaped form to cover an outermost circumference of the positive electrode tab; anda second insulating cover comprising a resin molded product having a shape which covers areas of the negative electrode lead and the negative electrode tab which are areas opposed to the inside surface of the case, the second insulating cover comprising an opening, a side plate covering an end face of the negative electrode tab, and a side plate curved into a U-shaped form to cover an outermost circumference of the negative electrode tab. 2. The battery according to claim 1, wherein the insulating tape covers the outermost circumference of the electrode group, so as to form one or more tape circumferential surfaces on the outermost circumference. 3. The battery according to claim 1, wherein the first insulating cover comprises a convex portion projected toward the end face of the positive electrode tab, and the second insulating cover comprises a convex portion projected toward the end face of the negative electrode tab. 4. The battery according to claim 1, wherein the outermost circumference of the electrode group is occupied by a portion of the separator. 5. The battery according to claim 4, wherein a short side width of the insulating tape is equal to or larger than a short side width of the separator. 6. The battery according to claim 4, wherein the insulating tape covers a partial area of the separator of the outermost circumference of the electrode group. 7. The battery according to claim 6, further comprising an electrolytic solution contained in the case. 8. The battery according to claim 7, wherein an uncovered section of the separator is located to contact the electrolytic solution. 9. The battery according to claim 1, wherein the insulating tape comprises a substrate, and the substrate has a thickness falling within a range of 0.012 to 0.2 mm. 10. The battery according to claim 1, wherein: a space is provided between the side plate curved into the U-shaped form of the first insulating cover and the inside surface of the case; anda space is provided between the side plate curved into the U-shaped form of the second insulating cover and the inside surface of the case. 11. The battery according to claim 1, further comprising: a first insulating cover fixing tape which fixes the side plate curved into the U-shaped form of the first insulating cover onto the insulating tape; anda second insulating cover fixing tape which fixes the side plate curved into the U-shaped form of the second insulating cover onto the insulating tape. 12. The battery according to claim 1, further comprising: a conductive positive electrode nipping member comprising first and second nipping sections, the first and second nipping sections of the conductive positive electrode nipping member dividing the positive electrode tab into two bundles in which portions of the positive electrode tab are laminated onto each other in a thickness direction of the electrode group, the first nipping section of the conductive positive electrode nipping member nipping one of the two bundles of the positive electrode tab, and the second nipping section of the conductive positive electrode nipping member nipping the other of the two bundles of the positive electrode tab; anda conductive negative electrode nipping member comprising first and second nipping sections, the first and second nipping sections of the conductive negative electrode nipping member dividing the negative electrode tab into two bundles in which portions of the negative electrode tab are laminated onto each other in the thickness direction of the electrode group, the first nipping section of the conductive negative electrode nipping member nipping one of the two bundles of the negative electrode tab, and the second nipping section of the conductive negative electrode nipping member nipping the other of the two bundles of the negative electrode tab.
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이 특허에 인용된 특허 (5)
Heurtel Jean-Louis (Gradignan FRX), Assembly of a group of electrodes and a terminal of a storage.
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