# US 8,771,863 B2 · Battery module and manufacturing method of battery module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,863 B2 - Document ID: US8771863B2 - Status: Granted - Kind: B2 - Application number: 12/919,969 - Filed: 2009-02-25 - Published: 2011-01-20 - Granted: 2014-07-08 - Earliest claimed: 2008-02-29 - Assignees: Nissan Motor Co., Ltd. - Applicants: Ryuichi Amagai; Naoki Aizawa; Naoto Todoroki - Inventors: Ryuichi Amagai; Naoki Aizawa; Naoto Todoroki - Web page: https://patentgrep.com/patent/US8771863B2 ## CPC - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 6/46: of flat cells - H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes} - H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) - H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence) - H01M 50/147: Lids or covers - H01M 50/224: Metals - H01M 50/258: Modular batteries; Casings provided with means for assembling - H01M 50/296: characterised by terminals of battery packs (terminals of batteries H01M50/543) - H01M 50/507: comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules - H01M 50/176: for prismatic or rectangular cells (H01M50/181 takes precedence) - H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence) - H01M 50/463: Separators, membranes or diaphragms characterised by their shape - H01M 50/516: by welding, soldering or brazing - H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding - H01M 50/54: Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges - H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - Y10T 29/49108: Electric battery cell making - 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 - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Provided is a battery module in which a stacked body (142) of a plurality of flat batteries (144A to 144D) stacked on one another is housed. The battery module includes the flat batteries, an output terminal, a metal container, insulating plates and an insulating cover (170). Each of the flat batteries (144A to 144D) includes a power-generating element, an exterior package member for sealing the power-generating element, and electrode terminals led out from the exterior package member. The output terminal is used to provide a parallel or series connection between the electrode terminals of the plurality of flat batteries (144A to 144D) and to output power therefrom. The metal container is used to house the stacked body. The insulating plates are disposed to hold the electrode terminals of the flat batteries (144A to 144D) therebetween in such a way to insulate the electrode terminals from one another, and also include window portions through which the electrode terminals are exposed for the connection. The insulating cover (170) is disposed in such a way to cover the window portions of the insulating plates (160A, 160E) located in the outermost layers. ## Claims ### Claim 1 A battery module comprising: a cell unit comprising: a stacked body of a plurality of flat batteries stacked on one another, each of the flat batteries including a power-generating element, an exterior package member for sealing the power-generating element, and electrode terminals led out from the exterior package member; an output terminal which provides a parallel or series connection between the electrode terminals of the plurality of flat batteries and outputs power therefrom; and insulating plates which are disposed to hold the electrode terminals of each of the flat batteries therebetween in such a way to insulate the electrode terminals from one another; and an insulating cover which is mounted to the cell unit and which includes a terminal guide for holding the output terminal, wherein the insulating cover is fixed to the insulating plates, and includes an upper side face portion and a lower side face portion arranged to sandwich the insulating plates in the flat batteries stacked direction, and wherein the terminal guide includes a wall portion having an upper side wall portion and a lower side wall portion arranged to sandwich the output terminal. ### Claim 2 (depends on 1) The battery module according to claim 1, further comprising a metal container which houses the cell unit with the insulating cover mounted thereto. ### Claim 3 (depends on 1) The battery module according to claim 1, wherein the insulating plates include window portions through which the electrode terminals are exposed for the connection, and the insulating cover is disposed in such a way to cover the window portions of the insulating plates located respectively in outermost layers. ### Claim 4 (depends on 1) The battery module according to claim 1, wherein the wall portion having a cross-section shape corresponding to an outer peripheral shape of the output terminal surrounding a periphery of the output terminal. ### Claim 5 (depends on 4) The battery module according to claim 4, wherein the tubular wall portion includes an extended portion extending beyond a lead end of the output terminal. ### Claim 6 (depends on 2) The battery module according to claim 2, further comprising a cushion member disposed between an inner face of the metal container and the insulating cover. ### Claim 7 (depends on 4) The battery module according to claim 4, wherein a cross-sectional shape of the tubular wall portion is a noncircular shape. ### Claim 8 (depends on 6) The battery module according to claim 6, wherein: the insulating cover includes an opening portion into which to insert a connector for detecting voltages of the flat batteries; a connector guide for guiding insertion and removal of the connector is disposed in an edge portion of the opening portion; and the insulating cover and the connector guide are integral with each other. ### Claim 9 (depends on 4) The battery module according to claim 4, wherein the tubular wall portion extends toward the stacked body. ### Claim 10 (depends on 9) The battery module according to claim 9, wherein: a base portion of the tubular wall portion is located outside a lead end of the output terminal; and an external bus bar is disposed in a recessed portion formed by the lead end of the output terminal and the base portion of the tubular wall portion. ### Claim 11 (depends on 4) The battery module according to claim 4, wherein the tubular all portion is disposed in such a way to face the front face side of the cell unit. ### Claim 12 (depends on 6) The battery module according to claim 6, wherein the insulating cover includes a contact portion in contact with a connecting portion to the output terminal for the electrode terminals of the flat batteries. ### Claim 13 (depends on 12) The battery module according to claim 12, wherein a direction in which the contact portion is in contact is identical to a direction of the stacking. ### Claim 14 (depends on 12) The battery module according to claim 12, wherein: the contact portion projects in a direction in which the insulating cover is fitted; and a corner of the contact portion at a leading end thereof is chamfered or rounded.