# US 2021/0242484 A1 · Secondary battery and battery pack including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242484 A1 - Document ID: US20210242484A1 - Status: Published application - Kind: A1 - Application number: 17/236,314 - Filed: 2021-04-21 - Published: 2021-08-05 - Earliest claimed: 2018-03-02 - Assignees: Sanyo Electric Co., Ltd. - Applicants: SANYO Electric Co., Ltd. - Inventors: Ryoichi Wakimoto; Yohei Muroya; Hiroyuki Yamada - Web page: https://patentgrep.com/patent/US20210242484A1 ## CPC - H01M 10/04: Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) - H01M 10/052: Li-accumulators - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators - H01M 50/15: for prismatic or rectangular cells (H01M50/153 takes precedence) - H01M 50/176: for prismatic or rectangular cells (H01M50/181 takes precedence) - H01M 50/20: Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M10/46) - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/502: Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing - H01M 50/512: Connection only in parallel - H01M 50/517: by fixing means, e.g. screws, rivets or bolts - H01M 50/55: on the same side of the cell - H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells - H01M 50/574: Devices or arrangements for the interruption of current - H01M 50/578: in response to pressure - H01M 50/583: in response to current, e.g. fuses - H01M 50/586: inside the batteries, e.g. incorrect connections of electrodes - H01M 50/588: outside the batteries, e.g. incorrect connections of terminals or busbars - H01M 50/593: Spacers; Insulating plates - H01M 50/538: Connection of several leads or tabs of wound or folded electrode stacks - H01M 2200/103: Fuse - H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane - 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 Provided are a secondary battery and a battery pack including the secondary battery. A sealing plate has a positive electrode terminal attachment hole. A positive electrode terminal penetrates the positive electrode terminal attachment hole. An external conductive member is connected to a portion of the positive electrode terminal located on the battery outer side with respect to the sealing plate. The conduction path between a positive electrode plate and the positive electrode terminal is provided with a current interrupting mechanism. A first insulating member made of resin is disposed between the sealing plate and the positive electrode terminal. A second insulating member having higher thermal resistance than the first insulating member is disposed between the external conductive member and the sealing plate. ## Claims ### Claim 1 A secondary battery comprising: an electrode body that includes a positive electrode plate and a negative electrode plate; an outer body that has an opening and houses the electrode body; a sealing plate that is made of metal and seals the opening; and a terminal that is electrically connected to the positive electrode plate or the negative electrode plate, wherein the sealing plate has a terminal attachment hole, the terminal penetrates the terminal attachment hole, an external conductive member is connected to a portion of the terminal located on a battery outer side with respect to the sealing plate, a conduction path between the positive electrode plate or the negative electrode plate and the terminal is provided with at least one of a current interrupting mechanism and a fuse part, a first insulating member is disposed between the sealing plate and the terminal, and a second insulating member having higher thermal resistance than the first insulating member is disposed between the external conductive member and the sealing plate, wherein a hollow is formed on an upper surface of the sealing plate, and wherein at least a portion of the second insulating member is accommodated in the hollow. ### Claim 2 (depends on 1) The secondary battery according to claim 1, wherein the current interrupting mechanism is disposed, and the current interrupting mechanism is a pressure-sensitive current interrupting mechanism that operates when an internal pressure of a battery case including the outer body and the sealing plate reaches a predetermined value or higher. ### Claim 3 (depends on 1) The secondary battery according to claim 1, wherein the first insulating member is made of resin. ### Claim 4 (depends on 1) The secondary battery according to claim 1, wherein the second insulating member contains ceramic. ### Claim 5 (depends on 1) The secondary battery according to claim 1, further comprising a bolt connected to the external conductive member. ### Claim 6 (depends on 1) The secondary battery according to claim 1, wherein the external conductive member is a busbar.