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PRESSING APPARATUS FOR MANUFACTURING SECONDARY BATTERY

NºPublicación:  US20260312147A1 08/10/2026
Solicitante: 
SAMSUNG SDI CO LTD [KR]
Samsung SDI Co., Ltd.
US_20260312147_A1

Resumen de: US20260312147A1

0000 Disclosed is a pressing apparatus for manufacturing a secondary battery. The pressing apparatus may include a pressing plate, and a pressing pad secured to a pressing surface of the pressing plate, and including a three-dimensional lattice structure provided by repeatedly or regularly arranging unit cells each formed by connecting struts.

Hochtemperaturverbindungselement

NºPublicación:  DE102026110070A1 08/10/2026
Solicitante: 
FEV GROUP GMBH [DE]
FEV Group GmbH
DE_102026110070_PA

Resumen de: DE102026110070A1

Die Erfindung betrifft ein Hochtemperaturverbindungselement (11). Das Hochtemperaturverbindungselement (11) umfasst eine hochtemperaturbeständige flexible Hülle (14), zumindest eine Verstärkungsstruktur (15), die sich innerhalb der Hülle (14) von einer ersten Hüllenseite (16) auf eine gegenüberliegende zweite Hüllenseite (17) erstreckt und die den maximalen Abstand begrenzt, den die beiden Hüllenseiten (16, 17) zueinander einnehmen können, und einen in der Hülle (14) angeordneten elastisch komprimierbaren Füllstoff (18). Ferner betrifft die Erfindung ein Verfahren zur Herstellung eines Hochtemperaturverbindungselements (11), ein Hochtemperaturverbindungssystem (7), einen Energiespeicher und ein Verfahren zum Herstellen eines Energiespeichers.

INSTALLATION FOR PERFORMING TESTS ON CELLS OF ELECTRIC BATTERIES, ADAPTED TO RECEIVE CELLS HAVING DIFFERENT CONFIGURATIONS AND DIFFERENT SIZES

NºPublicación:  WO2026210196A1 08/10/2026
Solicitante: 
COMAU S P A [IT]
COMAU S.P.A.
WO_2026210196_A1

Resumen de: WO2026210196A1

An installation (1) for performing tests on cells (P) of electric batteries, comprising a stationary structure (2, 3A) defining a plurality of compartments (4) each configured to receive and support one or more battery cells, with the two poles of each cell in electrical connection with an electrical circuit forming part of the installation (1). With each compartment (4) there is associated at least one cell support structure (6) removable in a drawer fashion from the respective compartment (4) and carrying a lower support (8) of the cell (P) and a pair of upper supports (9) provided with respective contact elements (12) configured to contact the two poles of the cell (P). The position and/or the configuration of the lower support (8) and of the two upper supports (9) are adjustable in such a way as to be adapted both to different cell types, selected out of prismatic-type cells, pouch-type cells or cylindrical-type cells, and, for each cell type, to different cell sizes.

METHOD FOR DISASSEMBLING ELECTRODE ASSEMBLY AND DEVICE FOR DISASSEMBLING ELECTRODE ASSEMBLY

NºPublicación:  US20260312165A1 08/10/2026
Solicitante: 
PRIME PLANET ENERGY & SOLUTIONS INC [JP]
Prime Planet Energy & Solutions, Inc.
US_20260312165_A1

Resumen de: US20260312165A1

0000 A method for disassembling an electrode assembly disclosed here includes: preparing an electrode assembly formed by stacking a strip-like first separator, a strip-like negative electrode, a strip-like second separator, and a strip-like positive electrode in this order and winding the stack in a predetermined winding direction; separating the electrode assembly into the first separator and the negative electrode, and the second separator and the positive electrode at a winding end portion of the electrode assembly; and pulling the first separator and the second separator, respectively, to unwind the electrode assembly. The unwinding includes applying an impact to at least one of the unwound first separator and the unwound second separator.

SYSTEMS AND METHODS FOR LOCKING BATTERY UNIT AND ELECTRIC VEHICLE

NºPublicación:  US20260307529A1 08/10/2026
Solicitante: 
STAAD GROEP B V [NL]
STAAD GROEP B.V.
US_20260307529_A1

Resumen de: US20260307529A1

The present disclosure provides a system comprising an electric vehicle and a battery unit, configured to be removably arranged on or at least partially in the electric vehicle and configured to be electrically connected to the electric vehicle. The system further comprises a locking mechanism, configured to mechanically connect the battery unit, when arranged on or in the electric vehicle, to the electric vehicle, and safety system. The safety system comprises a first sensor configured to detect whether there is an electrical connection between the electric vehicle and the battery unit, and a controller, configured to receive signals from the first sensor, and enable or disable the locking mechanism based on the received signals.

SOLID-STATE LITHIUM-SULFUR BATTERY

NºPublicación:  US20260312056A1 08/10/2026
Solicitante: 
TOYOTA JIDOSHA KK [JP]
TOYOTA JIDOSHA KABUSHIKI KAISHA
US_20260312056_A1

Resumen de: US20260312056A1

0000 A solid-state lithium-sulfur battery includes a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, and a negative electrode current collector layer in this order. The positive electrode active material layer contains a sulfur-based active material, a solid electrolyte, and a resin binder that binds them to each other, the resin binder is butadiene rubber not containing fluorine, and a content of the resin binder in the positive electrode active material layer is more than 0.0% by mass and 0.5% by mass or less.

NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

NºPublicación:  US20260312015A1 08/10/2026
Solicitante: 
TOYOTA JIDOSHA KK [JP]
TOYOTA JIDOSHA KABUSHIKI KAISHA
US_20260312015_A1

Resumen de: US20260312015A1

A negative electrode for a non-aqueous electrolyte secondary battery includes a current collector, a first active material layer, and a second active material layer in this order. Each of the first active material layer and the second active material layer contains a negative electrode active material. The negative electrode active material contains artificial graphite and an Si-based active material. A mass fraction of the Si-based active material in the first active material layer is higher than a mass fraction of the Si-based active material in the second active material layer. An alignment angle of the artificial graphite in the first active material layer is larger than an alignment angle of the artificial graphite in the second active material layer. The alignment angle indicates an acute angle between a major axis diameter of the artificial graphite and a surface of the current collector.

SYSTEM FOR CONNECTING A BATTERY, BATTERY AND VEHICLE

NºPublicación:  WO2026209963A1 08/10/2026
Solicitante: 
ACCUMULATEURS FIXES [FR]
SAFT
WO_2026209963_A1

Resumen de: WO2026209963A1

The present invention relates to a system (20) for connecting a battery (12) comprising a plurality of modules (15), the connecting system (20) being suitable for connecting the modules (15) to power terminals (16, 18) and comprising: - a main connection branch (26) inserted between the modules (15) and a power terminal (16, 18) and comprising a main closing member (30, 32) having a position dependent on the value of a first connection setpoint, and - a secondary connection branch (28) inserted between the modules (15) and a power terminal (16, 18) and comprising two secondary closing members (34, 36) in series each having a position dependent on the value of a second connection setpoint, the second connection setpoint being different from the first connection setpoint.

CATHODE ACTIVE MATERIAL

NºPublicación:  US20260312028A1 08/10/2026
Solicitante: 
TOYOTA JIDOSHA KK [JP]
TOYOTA JIDOSHA KABUSHIKI KAISHA
US_20260312028_A1

Resumen de: US20260312028A1

0000 The cathode active material includes at least one element selected from the group consisting of Ni, Co, and Mn. The cathode active material has a form in which two or more primary particles overlap each other. The primary particles are single crystals having a crystal structure belonging to space group R-3m. The primary particles are stacked such that the (003) planes of the primary particles are oriented parallel to each other. The ratio of the length of the shortest primary particle to the length of the longest primary particle among the primary particles, in a direction parallel to the (003) planes of the primary particles, is from 0.95 to 1.

BUSBAR ASSEMBLY AND BATTERY PACK INCLUDING THE SAME

NºPublicación:  US20260312243A1 08/10/2026
Solicitante: 
SAMSUNG SDI CO LTD [KR]
SAMSUNG SDI CO., LTD.
US_20260312243_A1

Resumen de: US20260312243A1

A busbar assembly and a battery pack including the same are disclosed. A busbar assembly includes a first busbar electrically connecting a plurality of battery cells and a second busbar electrically connected to the first busbar and connected to a protection device, in which the second busbar includes a welding portion connected to the first busbar and a binding portion extending from the welding portion and connected to the protection device.

Batterie für ein Kraftfahrzeug, Verfahren zum Zerlegen einer Batterie und Kraftfahrzeug

NºPublicación:  DE102025001128A1 08/10/2026
Solicitante: 
MERCEDES BENZ GROUP AG [DE]
Mercedes-Benz Group AG
DE_102025001128_PA

Resumen de: DE102025001128A1

Die Erfindung betrifft eine Batterie (10) für ein Kraftfahrzeug, mit einem Batteriegehäuse (12) und wenigstens einem Zellmodul (14), welches an einer Wandung (16) des Batteriegehäuses (12) angeordnet ist, wobei das wenigstens eine Zellmodul (14) ein Zellmodulgehäuse (18) und in diesem angeordnete Batteriezellen (20) umfasst, und ein Modulwandung (22) des Zellmodulgehäuses (18) mittels eines Klebestoffs (24) mit der Wandung (16) des Batteriegehäuses (12) verbunden ist, wobei der Klebstoff (24) wenigstens eine Klebeschicht (26) zwischen der Wandung und der Modulwandung (22) ausbildet, deren Klebeeigenschaft mittels eines Auslösemechanismus deaktivierbar ist, wodurch das Zellmodul (14) aus dem Batteriegehäuse (12) lösbar ist. Ferner betrifft die Erfindung ein Verfahren zum Zerlegen einer Batterie für ein Kraftfahrzeug sowie ein Kraftfahrzeug.

PROCESSING DEVICE, PROCESSING METHOD, AND METHOD FOR MANUFACTURING POUCH-TYPE BATTERY CELL

NºPublicación:  WO2026211187A1 08/10/2026
Solicitante: 
KANEKA CORP [JP]
\u682A\u5F0F\u4F1A\u793E\u30AB\u30CD\u30AB
WO_2026211187_A1

Resumen de: WO2026211187A1

The present invention provides a processing device capable of inhibiting the occurrence of cracks in a pouch-type battery cell. Provided is a processing device (100) which processes an exterior body (3) of a pouch-type battery cell (1) that is provided with a battery element (2), the exterior body (3), and a pair of tab leads (4), the processing device (100) comprising a mounting unit (130) and a processing unit (140) that performs a prescribed process, wherein: a processing region (R1) extends in a first direction (D1); the mounting unit (130) includes a mounting plate (132) on which the pouch-type battery cell (1) is mounted and a protruding section (134) which protrudes from the mounting plate (132); and, when the processing unit (140) subjects the exterior body (3) to the prescribed process, positioning of the battery element (2) in a second direction (D2) with respect to the processing region (R1) is executed as a result of the tab lead (4) coming into contact with the protruding section (134), the second direction (D2) being orthogonal to the first direction (D1).

Batteriepaket

NºPublicación:  DE102026104747A1 08/10/2026
Solicitante: 
TOYOTA MOTOR CO LTD [JP]
TOYOTA JIDOSHA KABUSHIKI KAISHA
DE_102026104747_PA

Resumen de: DE102026104747A1

Ein Batteriepaket kann eine Batteriezelle, einen unterhalb der Batteriezelle angeordneten Kühler mit einem Kühlkanal und eine Schutzplatte umfassen, die den Kühler von unten abdeckt. An der Unterseite des Kühlers kann eine sich entlang des Kühlkanals erstreckende Nut vorgesehen sein. An der Oberseite der Schutzplatte kann mindestens eine in Richtung des Kühlers vorstehende Verstärkungsrippe vorgesehen sein. Die Verstärkungsrippe kann in der Nut des Kühlers aufgenommen sein.

METHOD FOR PRODUCING ELECTRODE MIXTURE, METHOD FOR PRODUCING ELECTRODE FOR ALL-SOLID-STATE BATTERY, AND METHOD FOR PRODUCING ALL-SOLID-STATE BATTERY

NºPublicación:  WO2026211473A1 08/10/2026
Solicitante: 
MAXELL LTD [JP]
\u30DE\u30AF\u30BB\u30EB\u682A\u5F0F\u4F1A\u793E
WO_2026211473_A1

Resumen de: WO2026211473A1

Provided are a method for producing an electrode mixture for obtaining an electrode capable of constituting an all-solid-state battery with excellent characteristics, a method for producing the electrode, and a method for producing the all-solid-state battery. The method for producing an electrode mixture involves performing dry mixing of an electrode active material and a solid electrolyte using a mixing device to produce an electrode mixture. A resonance mixer is used as the mixing device, and a mixing medium is loaded into a mixing container installed in the mixing device to mix the electrode active material and the solid electrolyte. The method for producing an electrode for an all-solid-state battery involves producing an electrode that is for use in an all-solid-state battery and has a molded body of an electrode mixture containing an electrode active material and a solid electrolyte. The method for producing an electrode for an all-solid-state battery includes a step for producing a molded body of the electrode mixture by molding the electrode mixture produced by the method of the present invention. In the method for producing an all-solid-state battery, an electrode for an all-solid-state battery produced by the method of the present invention is used as at least one of a positive electrode and a negative electrode.

SULFIDE SOLID ELECTROLYTE

NºPublicación:  WO2026211769A1 08/10/2026
Solicitante: 
IDEMITSU KOSAN CO LTD [JP]
\u51FA\u5149\u8208\u7523\u682A\u5F0F\u4F1A\u793E
WO_2026211769_A1

Resumen de: WO2026211769A1

Provided is a sulfide solid electrolyte having high ionic conductivity and a rough surface shape, containing lithium atoms, phosphorus atoms, and sulfur atoms, and having a roughness index (RI) of 200% or more, calculated by a formula: RI = A1/A0 × 100 (in the formula, A1 represents the surface area per particle (μm2/particle) and A0 represents the surface area per true spherical particle (μm2/particle)).

CHARGING SYSTEM AND CHARGING METHOD

NºPublicación:  WO2026211246A1 08/10/2026
Solicitante: 
PANASONIC INTELLECTUAL PROPERTY MAN CO LTD [JP]
\u30D1\u30CA\u30BD\u30CB\u30C3\u30AF\uFF29\uFF30\u30DE\u30CD\u30B8\u30E1\u30F3\u30C8\u682A\u5F0F\u4F1A\u793E
WO_2026211246_A1

Resumen de: WO2026211246A1

The present disclosure provides a charging system capable of improving reliability of a secondary battery. A charging system (10) according to the present disclosure comprises: a constant current charging device (11); a constant-current/constant-voltage charging device (12) capable of switching between constant current charging and constant voltage charging; a temperature sensor (15) that detects the ambient temperature of a secondary battery (5); and a control device (20). The control device (20) detects an ambient temperature (T1) of the secondary battery (5) after the secondary battery (5) has been initially charged for a first prescribed time (S1) with a constant first current (It1) using the constant current charging device (11). When an ambient temperature (Th1) is equal to or less than a reference temperature (Ths), the control device (20) charges the secondary battery (5) with a constant second voltage (E2) by controlling the charging current to a second current (It2) or less using the constant-current/constant-voltage charging device (12). When an ambient temperature (Th1) is higher than the reference temperature (Ths), the control device (20) charges the secondary battery (5) with a constant second current (It2) by using the constant-current/constant-voltage charging device (12).

METHOD AND DEVICE FOR ALIGNING BATTERY CELLS IN ORDER TO ASSEMBLE A BATTERY CELL SYSTEM

NºPublicación:  WO2026209646A1 08/10/2026
Solicitante: 
GROB WERKE GMBH & CO KG [DE]
GROB-WERKE GMBH & CO. KG
WO_2026209646_A1

Resumen de: WO2026209646A1

The aim of the invention is to improve the assembly of battery cells (12) during the industrial series production of battery cell systems (40), such as battery packs or battery modules for example, in particular with regard to costs, emissions, time, and space requirements. According to the invention, this is achieved by a cell alignment method having the steps of: a) providing individual battery cells (12); b) receiving and transporting the battery cells (12) to a turning station (30) such that battery cells (12) are transported one after the other in a row (31); c) turning one or more of the battery cells (12) from the row (31) of battery cells (12) so as to form, in the row (31) of battery cells (12), a specified sequence of battery cells (12) which are in specific positions or alignments and/or battery cells (12) which have poles (32.2, 32.2) in specific orientations; and e) providing the battery cells (12) in the sequence obtained by step c) for assembly. The invention also relates to a device (10) for carrying out the method and to the use thereof in a battery cell system assembly process.

Batteriezellgehäuse

NºPublicación:  DE102025113380A1 08/10/2026
Solicitante: 
VOLKSWAGEN AG [DE]
VOLKSWAGEN AKTIENGESELLSCHAFT
DE_102025113380_PA

Resumen de: DE102025113380A1

Die Erfindung betrifft ein Batteriezellgehäuse (10) mit einem Gehäusekörper (12) zur umschließenden Anordnung mindestens einer Batteriezelle (14). In dem Gehäusekörper (12) ist mindestens eine Ventilationseinrichtung (18) vorgesehen. Innenseitig des Gehäusekörpers (12) ist mindestens eine aktivierbare Isolationsschicht (20) angeordnet. Die aktivierbare Isolationsschicht (20) erstreckt sich vollflächig über die innenseitigen Wände des Gehäusekörpers (12) mit Ausnahme mindestens einer, sich um die Ventilationseinrichtung (18) erstreckenden thermischen Isolationsschicht-Ausnehmung (22).

LITHIUM SECONDARY BATTERY CAPACITY DIAGNOSIS SYSTEM AND METHOD

NºPublicación:  WO2026212377A1 08/10/2026
Solicitante: 
LG ENERGY SOLUTION LTD [KR]
\uC8FC\uC2DD\uD68C\uC0AC \uC5D8\uC9C0\uC5D0\uB108\uC9C0\uC194\uB8E8\uC158
WO_2026212377_A1

Resumen de: WO2026212377A1

The present invention relates to a lithium secondary battery capacity diagnosis system and method, the system comprising: a storage unit that monitors a lithium secondary battery and stores charging capacity data including a first charging capacity (Q1) in a jig formation process and a second charging capacity (Q2) measured at an arbitrary temperature (T1); an analysis unit that derives a correction equation for correction to a process capacity (Q3) at a specific temperature (T2) by performing regression analysis on the charging capacity data; and a calculation unit that calculates the process capacity (Q3) at the specific temperature (T2) by applying the first charging capacity (Q1) and the second charging capacity (Q2) to the correction equation. The lithium secondary battery capacity diagnosis system can improve the agreement between the process capacity derived by correction and the actual process capacity, and shorten the process time.

THERMAL MANAGEMENT SYSTEM AND CONTROL METHOD THEREFOR, BATTERY PACK AND ELECTRICAL DEVICE

NºPublicación:  WO2026208078A1 08/10/2026
Solicitante: 
EVE ENERGY CO LTD [CN]
\u60E0\u5DDE\u4EBF\u7EAC\u9502\u80FD\u80A1\u4EFD\u6709\u9650\u516C\u53F8
WO_2026208078_A1

Resumen de: WO2026208078A1

Provided in the present application are a thermal management system and a control method therefor, a battery pack, and an electrical device. The thermal management system comprises a plurality of heat exchange assemblies, at least some of the heat exchange assemblies comprising a plurality of heat exchange units; the plurality of heat exchange assemblies are connected in series, and the plurality of heat exchange units are connected in parallel; or the plurality of heat exchange assemblies are connected in parallel, and the plurality of heat exchange units are connected in series.

Verfahren zur Überprüfung eines Akkus in einem Reinigungsroboter und Überprüfungsanordnung

NºPublicación:  DE102025113446A1 08/10/2026
Solicitante: 
BSH HAUSGERAETE GMBH [DE]
BSH Hausger\u00E4te GmbH
DE_102025113446_PA

Resumen de: DE102025113446A1

Die Erfindung betrifft ein Verfahren zur Überprüfung eines Akkus 3 in einem Reinigungsroboter 2, wobei der Reinigungsroboter 2 den Akku 3 aufweist und wobei der Akku 3 eine aktuelle Nutzkapazität 9a, b, c aufweist, wobei der Reinigungsroboter 2 einen ersten Reinigungsvorgang ausführt, wobei eine erste Energiemenge 10 für den ersten Reinigungsvorgang aus dem Akku 3 entnommen wird, wobei die erste Energiemenge 10 ein Nennanteil der aktuellen Nutzkapazität 9a ist und der Nennanteil ermittelt wird und wobei der Reinigungsroboter wenigstens einen zweiten Reinigungsvorgang ausführt, wobei eine jeweilige zweite Energiemenge 11 für den jeweiligen zweiten Reinigungsvorgang aus dem Akku 3 entnommen wird, wobei die jeweilige zweite Energiemenge 11 ein jeweiliger Momentananteil der jeweils aktuellen Nutzkapazität 9b, c ist und der jeweilige Momentananteil ermittelt wird, wobei die jeweilige zweite Energiemenge 11 gleich der ersten Energiemenge 10 ist und wobei ein jeweiliger Akkuzustand auf Basis einer Relation zwischen dem Nennanteil und dem jeweiligen Momentananteil ermittelt wird. Des Weiteren betrifft die Erfindung eine Überprüfungsanordnung mit einer Steuereinheit 4, dem Reinigungsroboter 2 und dem Akku 3, zur Überprüfung des Akkus 3 in dem Reinigungsroboter 2.

SEPARATOR FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

NºPublicación:  WO2026212374A1 08/10/2026
Solicitante: 
SAMSUNG SDI CO LTD [KR]
\uC0BC\uC131\uC5D0\uC2A4\uB514\uC544\uC774 \uC8FC\uC2DD\uD68C\uC0AC
WO_2026212374_A1

Resumen de: WO2026212374A1

The present disclosure relates to: a separator for a lithium secondary battery; and a lithium secondary battery comprising same, and may provide a separator for a lithium secondary battery, comprising a porous substrate and a coating layer disposed on at least one surface of the porous substrate, wherein the coating layer includes a NASICON-based compound, an acrylate-based crosslinking agent, and a silane coupling agent.

BATTERY MANAGEMENT DEVICE AND METHOD THERFOR

NºPublicación:  WO2026212426A1 08/10/2026
Solicitante: 
LG ENERGY SOLUTION LTD [KR]
\uC8FC\uC2DD\uD68C\uC0AC \uC5D8\uC9C0\uC5D0\uB108\uC9C0\uC194\uB8E8\uC158
WO_2026212426_A1

Resumen de: WO2026212426A1

A battery diagnosis device according to one embodiment of the present document may comprise a memory and one or more processors, wherein, on the basis of detecting an occurrence of a fire related to a battery unit being monitored, the one or more processors can transmit, through a first protocol, a signal indicating the occurrence of the fire to each of one or more other battery management devices; transmit, through a second protocol, a signal indicating the occurrence of the fire and a signal indicating the location of the occurrence of the fire to a specific battery management device located farthest from the battery management device that transmitted the signal from among the one or more other battery management devices; transmit, through the first protocol, battery data for a designated period of time of a battery cell included in the battery unit to each of the one or more other battery management devices; and transmit, through the second protocol, the battery data to the specific battery management device.

APPARATUS AND METHOD FOR MANUFACTURING ELECTRODE PLATE

NºPublicación:  US20260307355A1 08/10/2026
Solicitante: 
SK ON CO LTD [KR]
SK On Co., Ltd.
US_20260307355_A1

Resumen de: US20260307355A1

0000 An apparatus for manufacturing an electrode plate and a method for manufacturing an electrode plate are disclosed. In some implementations, an apparatus for manufacturing an electrode plate includes: a supply unit configured to supply an electrode plate; a pressing unit configured to press at least a portion of the electrode plate supplied from the supply unit; and a cutting unit configured to cut at least a portion of the electrode plate supplied from the pressing unit, wherein the pressing unit includes at least one pressing member configured to come into contact with the electrode plate, and the at least one pressing member has irregularities on a surface thereof.

BATTERY AND BATTERY MODULE

Nº publicación: WO2026211198A1 08/10/2026

Solicitante:

PANASONIC INTELLECTUAL PROPERTY MAN CO LTD [JP]
\u30D1\u30CA\u30BD\u30CB\u30C3\u30AF\uFF29\uFF30\u30DE\u30CD\u30B8\u30E1\u30F3\u30C8\u682A\u5F0F\u4F1A\u793E

WO_2026211198_A1

Resumen de: WO2026211198A1

A battery comprises: a cylindrical electrode body (14) in which a long positive electrode (11) and a long negative electrode (12) are wound with a separator interposed therebetween; and an exterior can (16) that accommodates the electrode body (14) and includes, in a cross section orthogonal to the axial direction, a cylindrical part (55) having a substantially polygonal outer edge (16a) and a substantially circular inner edge (16b). The positive electrode (11) or the negative electrode (12) is electrically connected to the exterior can (16). According to the battery of the present disclosure, it is possible to construct a battery module having a high energy density and to cause a substantially uniform circumferential stress to act on the electrode body (14), thereby making it easy to achieve good durability and performance.

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