# US 2014/0193700 A1 · Cylindrical battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193700 A1 - Document ID: US20140193700A1 - Status: Published application - Kind: A1 - Application number: 14/233,501 - Filed: 2012-07-20 - Published: 2014-07-10 - Earliest claimed: 2011-07-20 - Assignees: GS Yuasa International Ltd. - Inventors: Daisuke Okuda; Manabu Kanemoto; Mitsuhiro Kodama; Tadashi Kakeya - Web page: https://patentgrep.com/patent/US20140193700A1 ## CPC - H01M 10/0422: {Cells or battery with cylindrical casing} - H01M 10/0468: {Compression means for stacks of electrodes and separators} - H01M 10/28: Construction or manufacture - H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) - H01M 50/531: Electrode connections inside a battery casing - H01M 10/345: {Gastight metal hydride accumulators} - H01M 50/466: U-shaped, bag-shaped or folded - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A battery includes a cylindrical battery case and an electrode group including a positive electrode, a negative electrode, and a separator. The electrode group and the battery case define a space communicated from a top to a bottom, and one of the positive electrode and the negative electrode has a current collecting terminal that extends from the electrode group in a direction away from a center axis of the battery case and is in contact with a bottom surface of the battery case. ## Claims ### Claim 1 A cylindrical battery, comprising: a cylindrical battery case; and an electrode group including a positive electrode, a negative electrode, and a separator, wherein the electrode group and the battery case define a space communicated from a top to a bottom therebetween, and one of the positive electrode and the negative electrode has a current collecting terminal that extends from the electrode group in a direction away from a center axis of the battery case and is in contact with a bottom surface of the battery case. ### Claim 2 (depends on 1) The cylindrical battery according to claim 1, wherein one of the positive electrode and the negative electrode is an electrode plate including a current collector and an active material applied to the current collector, the current collector has an unapplied portion that is linearly formed and has no active material applied thereto, and applied portions that are formed at both ends of the unapplied portion and have the active material applied thereto, and the current collector is bent at the unapplied portion so that the applied portions at the both ends face each other, and the unapplied portion is partially bent outward to form the current collecting terminal. ### Claim 3 (depends on 2) The cylindrical battery according to claim 2, wherein the unapplied portion is partially formed with a slit and an inside of the slit is bent outward to form the current collecting terminal. ### Claim 4 (depends on 2) The cylindrical battery according to claim 2, wherein the unapplied portion is partially bent outward from one of the applied portions along a bent line on a boundary or a line inside the boundary between the unapplied portion and the applied portion. ### Claim 5 (depends on 2) The cylindrical battery according to claim 2, wherein the bent current collecting terminal and the unapplied portion are located substantially in an identical plane. ### Claim 6 (depends on 2) The cylindrical battery according to claim 2, wherein in at least one of the bent applied portions at the both ends, the active material applied to an outer surface of the current collector is thinner than the active material applied to an inner surface of the current collector. ### Claim 7 (depends on 6) The cylindrical battery according to claim 6, wherein in each of the bent applied portions at the both ends, the active material applied to the outer surface of the current collector is smaller in amount than the active material applied to the inner surface of the current collector. ### Claim 8 (depends on 1) The cylindrical battery according to claim 1, wherein the current collecting terminal is welded to the bottom surface of the battery case. ### Claim 9 (depends on 2) The cylindrical battery according to claim 2, wherein the electrode group is accommodated such that the unapplied portion is located close to the bottom surface of the battery case. ### Claim 10 (depends on 1) The cylindrical battery according to claim 1, wherein the current collecting terminal is in contact with the bottom surface and an inner peripheral surface of the battery case. ### Claim 11 (depends on 1) The cylindrical battery according to claim 1, wherein the cylindrical battery has a space communicated from the top to the bottom, and a welding rod used for welding the electrode group to the bottom surface or an inner peripheral surface of the battery case is inserted into the space. ### Claim 12 (depends on 1) The cylindrical battery according to claim 1, further comprising at least one spacer fixing the electrode group in the battery case, wherein the spacer has the space communicated from the top to the bottom. ### Claim 13 (depends on 12) The cylindrical battery according to claim 12, wherein the at least one spacer includes paired spacers that are provided between an inner peripheral surface of the battery case and the paired outer side surfaces, respectively, and the paired spacers are asymmetrical with respect to the electrode group when viewed in a center axis direction of the battery case. ### Claim 14 (depends on 13) The cylindrical battery according to claim 13, wherein one of the positive electrode and the negative electrode in the electrode group has the single current collecting terminal, and the current collecting terminal is welded to the bottom surface of the battery case at one position. ### Claim 15 (depends on 13) The cylindrical battery according to claim 13, wherein each of the spacers includes a flat electrode contact portion having a first surface serving as a contact surface with the electrode group, and a case contact portion extending from a second surface of the electrode contact portion and being in contact with the inner peripheral surface of the battery case, and the case contact portions of the spacers extend respectively from the electrode contact portions at positions asymmetrical with respect to the electrode group. ### Claim 16 (depends on 15) The cylindrical battery according to claim 15, wherein each of the case contact portions extends from the electrode contact portion at a position that is away from a center in a width direction of the electrode contact surface. ### Claim 17 (canceled) ### Claim 18 (depends on 13) The cylindrical battery according to claim 13, wherein each of the spacers includes a flat electrode contact portion having a first surface serving as a contact surface with the electrode group and at least one case contact portion extending from a second surface of the electrode contact portion and being in contact with the inner peripheral surface of the battery case, and the number of the case contact portions in one of the spacers is different from the number of the case contact portions in another one of the spacers. ### Claim 19 (depends on 1) The cylindrical battery according to claim 1, further comprising at least one spacer fixing the electrode group at a position decentered from a center position of the battery case. ### Claim 20 (depends on 19) The cylindrical battery according to claim 19, wherein the at least one spacer includes paired spacers that are located to sandwich the electrode group, and the paired spacers are asymmetrical with respect to the electrode group when viewed in a center axis direction of the battery case. ### Claim 21 (canceled) ### Claim 22 (canceled) ### Claim 23 (depends on 1) The cylindrical battery according to claim 1, wherein the positive electrode and the negative electrode are layered with the separator being interposed therebetween in the electrode group.