Abstract: A power storage component module includes power storage components and a bus bar connecting the power storage components to one another. At least one positioning boss is provided on an electrode included in the power storage components. The at least one positioning boss protrudes upward. The at least one positioning boss includes a base end and a distal end having a diameter less than a diameter of the base end. At least one through hole opens in the bus bar. The bus bar is placed on the at least one positioning boss and a hole edge of the at least one through hole is disposed around the at least one positioning boss between the base end of the at least one positioning boss and the distal end of the at least one positioning boss in a vertical direction.

Abstract: A battery module includes an insulating base, a pair of electrodes and multiple battery packs. Each electrode is installed to the insulating base and has a bridge portion and a wire connecting part exposed from the insulating base, and a pair of lugs is extended smoothly from each battery pack, and an end of at least a part of the lugs is attached to each bridge portion correspondingly. Therefore, the lug is not being twisted or deformed easily, and the battery module may have good conductive efficiency, long service life, and convenience of changing the battery pack.

Abstract: A battery pack includes: a plurality of bare cells including an electrode terminal at both ends thereof; and an electrode tab arranged at each of the both ends to electrically connect adjacent bare cells to each other, wherein the electrode tab includes: a plate including a plurality of opening portions formed corresponding respectively to the plurality of bare cells; a plurality of fuse portions extending from one edge of the plurality of opening portions into the plurality of opening portions; and a plurality of coupling portions bent from the plurality of fuse portions, arranged at a center portion of the plurality of opening portions, and coupled to the electrode terminal.

Abstract: An inter-terminal connection structure electrically connecting terminal portions via a conductive component. The conductive component includes a conductive member having connection portions that are fastened so as to be connected to the respective terminal portions, and a case having insulation properties while accommodating the conductive member, an insulating cover covering at least one of the terminal portions and the connection portions, an opening window provided to the insulating cover and exposing at least one of the terminal portions and the connection portions, and a relay portion provided to the connection portion or the terminal portion fastened to the at least one of the terminal portions and the connection portions covered by the insulating cover while being inserted through the opening window to be connected to the at least one of the terminal portions and the connection portions.

Abstract: A battery pack is provided including a battery module having a plurality of battery cells or a unit module having the plurality of battery cells; a battery pack frame body including a base plate on which the battery module or the unit module is mounted, and a first side plate and a second side plate connected to the base plate and disposed to face each other; a top frame coupled to an upper portion of the battery pack frame body; and a first end plate and a second end plate electrically connected to electrode terminals of the battery module or the unit module, wherein at least one of the first end plate and the second end plate is configured to include slits.

Abstract: A secondary battery includes an electrode body that includes a positive and a negative electrode plate, a battery case that has an opening in which the electrode body is accommodated, a sealing body that seals the opening, an internal terminal that is disposed on an inner side of the sealing body and connected to the positive or the negative electrode plate, and an external terminal that is disposed on an outer side of the sealing body and connected to the internal terminal. The external terminal includes a rivet that is formed in such a manner as to extend through the sealing body, and the internal terminal includes a first portion made of a first metal and a second portion made of a second metal. The external terminal is made of the second metal, and the rivet of the external terminal is joined to the second portion of the internal terminal.

Abstract: A battery module which includes: a battery stack formed by stacking a plurality of battery cells respectively including electrode tabs on each other; and bus bar assemblies located on sides of the battery stack, from which the electrode tabs are drawn out, to electrically connect the plurality of battery cells to each other through a plurality of electrode tabs, wherein each of the bus bar assemblies includes a plurality of openings configured to hold the plurality of electrode tabs, and each of the plurality of openings includes an insertion portion formed by opening one side thereof so that the electrode tab is slidely inserted in a direction perpendicular to a direction in which the electrode tabs are drawn out.

Abstract: The present disclosure is directed to a cordless power tool vibration isolation system. A solution to negative impacts of vibration on a removable battery pack caused by operation of a cordless power tool. Isolating the battery pack from the power tool reduces wear and tear on the battery pack including the pack housing, the pack terminals and internal pack components. A battery pack interface of the power tool including a discrete interface housing that mates with the battery pack and a vibration isolation element that separates and isolates the combination of the discrete interface housing and the battery pack from the power tool and the power tool's associated motor induced vibrations.

Abstract: A current interrupt device, which may be included in a battery module, includes first and second connection parts each having one surface on which an inclined surface is formed; wherein the inclined surface of the first connection part and the inclined surface of the second connection part contact each other to form a contact interface, the first connection part and the second connection part are electrically connected to each other, and when an external force equal to or greater than a predetermined force is applied to the inclined surface of the first connection part or the inclined surface of the second connection part, the inclined surface of the first connection part and the inclined surface of the second connection part are dislocated with respect to each other on the contact interface to interrupt electrical connection between the first connection part and the second connection part.

Abstract: A battery module blocks current when the temperature rises, a battery pack includes the battery module, and a vehicle includes the battery pack. The battery module includes a bus bar having an approximately thin plate shape compared to a length and a width and having linear grooves provided in a left surface and a right surface along a longitudinal direction, respectively; and battery cells respectively located on the left surface and the right surface of the bus bar, physically contacting with their respective electrode leads inserted into the grooves, and electrically connected to each other with the bus bar interposed therebetween, and wherein sizes of the grooves increase in a thickness direction at a certain temperature or higher to release a physical contact between the electrode leads and the bus bar such that an electrical connection between the battery cells is released.

Abstract: An automotive busbar includes a first rigid section and a second rigid section, each of the first and second rigid sections formed from a first conductive metallic material and having a first effective cross-sectional area, and a flexible section positioned between and interconnecting the first and second rigid sections, the flexible section made from a second conductive metallic material and having a second effective cross sectional area, and a top surface and a bottom surface, at least one of the top and bottom surface including a plurality of voids formed therein and spaced along the flexible section, wherein, the second effective cross-sectional area is less than the first effective cross-sectional area and the second conductive material has a higher conductivity than the first conductive material.

Abstract: Disclosed is a battery cell connector formed so as to have a general hexahedral shape, the battery cell connector including a lower mounting unit, in which a lower part of a cylindrical battery cell is mounted, an upper mounting unit, in which an upper part of another cylindrical battery cell is mounted, and a connection unit formed at a front surface, a rear surface, a left surface, and a right surface of the battery cell. The connection unit being configured to electrically and physically connect the battery cell connector to another battery cell connector, wherein the lower mounting unit, the upper mounting unit, and the connection unit are electrically connected to each other in the battery cell connector.

Abstract: To provide a solid-state battery in which the capacity and voltage can be optionally adjusted in a single battery and the installation space for the battery can be reduced. A solid-state battery includes a plurality of electrode layers, and a solid electrolyte layer disposed between the electrode layers. The electrode layers includes positive electrode portion formed by filling a current collector including a metal porous body with a positive electrode material mixture, negative electrode portion formed by filling a current collector including a metal porous body with a negative electrode material mixture, and an isolation portion formed between the positive electrode portion and the negative electrode portion. Between the plurality of electrode layers disposed adjacent to each other, the positive electrode portion and the negative electrode portion are disposed so as to face each other, and the isolation portions are disposed so as to face each other.

Abstract: A battery module includes a plurality of battery cells each including an electrode terminal, and a bus bar that connects respective electrode terminals of adjacent battery cells in a state where the plurality of battery cells are stacked, wherein the bus bar includes a first bus bar having a first thickness, and a second bus bar having a second thickness larger than the first thickness, the first bus bar is connected to the respective electrode terminals of the adjacent battery cells, and the second bus bar is in non-contact with electrode terminals of the battery cells.

Abstract: An example system includes a motive application having a prime mover, a load, a driveline, and a motor/generator that couples to the driveline. The system includes a number of batteries, and a battery assembly that electrically couples the batteries to the motor/generator. The battery assembly includes a power interface positioned at a first end of the battery assembly, the power interface including a low voltage coupling and a high voltage coupling, and a service electrically interposed between the batteries and the power interface. The service disconnect in a first position couples at least one of the batteries to the first low voltage coupling and couples the batteries to the second high voltage coupling. The service disconnect in a second position de-couples the batteries from the low voltage coupling and the high voltage coupling.

Abstract: An embodiment of the invention provides a battery module assembly, including: a first battery module including a first module case housing a plurality of battery cells, and a first input/output terminal and a second input/output terminal that are provided at one side of the first module case; and a second battery module including a second module case housing a plurality of battery cells, and a first input/output terminal and a second input/output terminal that are provided at one side of the second module case. The first input/output terminal of the first battery module may be formed by extending a first module bus bar connected to at least one of the plurality of battery cells inside the module case, and may extend to the second input/output terminal of the second battery module to be connected to the second input/output terminal.

Abstract: A current measuring circuit measures a charging current of a battery comprising a plurality of cell groups while the battery is being charged using one of a plurality of charging systems. A voltage measuring circuit measures voltages of the cell groups. A controller defines a plurality operating regions in a charging current profile of the battery during a charging cycle, filters the charging current and the voltages measured in the operating regions, calculates internal resistances of the cell groups in the operating regions based on the filtered current and voltages, generates at least one of statistical values and distance metrics based on the internal resistances of the cell groups, and determines whether one or more of the cell groups is faulty based on the at least one of the statistical values and the distance metrics irrespective of the plurality of charging systems used to charge the battery.

Abstract: A battery module that effectively protects internal components from external impact and increases manufacturing efficiency is disclosed. The battery module includes a plurality of can type secondary batteries arranged to be laid down in a horizontal direction; a bus bar at least partially formed of an electrically conductive material to electrically connect the plurality of can type secondary batteries; and a module case in which an inner space is formed to accommodate the plurality of can type secondary batteries, and comprising an outer wall formed to surround the inner space and a bumper portion configured to protrude from an outer surface of the outer wall in an outer direction to absorb an external impact.

Abstract: An embodiment of the present application provides a battery cell, a battery, a power consumption device, and a manufacturing device and method for a battery cell. The battery cell includes a housing, an electrode assembly, an end cover assembly and a current collecting member. The electrode assembly is accommodated in the housing, and the electrode assembly includes a tab. The end cover assembly includes an end cover, an electrode terminal and an insulating member, the end cover is used to cover at an opening of the housing, the electrode terminal is mounted to the end cover, and the insulating member is located on one side of the end cover facing the electrode assembly. The current collecting member is used to connect the electrode terminal and the tab. This structure can make more space for the electrode assembly and can effectively increase the capacity of the battery cell.

Abstract: A battery module is disclosed, which includes: a multiplicity of battery cells; a printed circuit board with a first series-connector with a first pad area and a second pad area, and a second series-connector with a third pad area and a fourth pad area; a cross-connector, which connects the first series-connector between the first pad area and the second pad area with the second series-connector between the third pad area and the fourth pad area; and a sensor configured to detect a cross-current at the cross-connector. The first contact electrode of a first battery cell is connected with the first pad area. The second contact electrode of a second battery cell is connected with the second pad area. The first contact electrode of a third battery cell is connected with the third pad area. The second contact electrode of a fourth battery cell is connected with the fourth pad area.

Abstract: A novel electrode is provided. A novel power storage device is provided. A conductor having a sheet-like shape is provided. The conductor has a thickness of greater than or equal to 800 nm and less than or equal to 20 ?m. The area of the conductor is greater than or equal to 25 mm2 and less than or equal to 10 m2. The conductor includes carbon and oxygen. The conductor includes carbon at a concentration of higher than 80 atomic % and oxygen at a concentration of higher than or equal to 2 atomic % and lower than or equal to 20 atomic %.

Abstract: A battery cell comprises at least one galvanic cell, a first cell housing element, and a second cell housing element. The two cell housing elements jointly substantially completely enclose the galvanic cell. The first cell housing element has inner recesses on the inner surface thereof, which inner recesses are, on an outer surface of the first cell housing element lying immediately opposite the inner surface, outer protrusions for electrically contacting a first further battery cell. First compensation elements are complementary to the inner recesses in such away and are arranged in the inner recesses in such a way that the first compensation elements, together with the inner recesses, form a substantially flat inner surface of the first cell housing element.

Abstract: To improve the safety of a secondary battery, the present disclosure provides a secondary battery including: a plurality of battery cells each including a case and an electrode assembly accommodated in the case; a plurality of first bus bars electrically connected to the plurality of battery cells and having a first thickness, the plurality of first bus bars being apart from each other with a predetermined gap therebetween; and a second bus bar arranged above the plurality of first bus bars and electrically connected to the plurality of first bus bars, the second bus bar having a second thickness greater than the first thickness.

Abstract: A socket connector includes a housing having a pin access opening through a bottom open to a cavity configured to receive a pin. The socket connector includes a socket in the cavity electrically connected to a pin. The socket connector includes a latch movably received in a latch pocket to engage the pin to secure the socket connector to the pin. The latch includes a latch release accessible exterior of the housing to release the latch. The latch release moves the latch between a latched position and a clearance position. A latching rib of the latch engages the pin in the latched position and is released from the pin in the clearance position to allow uncoupling of the socket connector from the pin.

Abstract: The disclosure discloses a battery module. The electrical connection between a first electrode of a first battery and a second electrode of a second battery can be realized by setting a jumper electrode connector, thereby facilitating realization of connection relationship of multiple batteries. Moreover, an insulating structure is provided between the jumper electrode connector and the battery. Also, the jumper electrode connector includes a first through hole, the orthographic projection of the first through hole and the orthographic projection of the explosion-proof valve at least partially overlap each other, and the orthographic projection of the first through hole overlaps the orthographic projection of the insulating structure.

Abstract: A battery module improves safety by blocking current when the temperature rises, a battery pack includes the battery module, and a vehicle includes the battery pack. The battery module includes two or more battery cells, an electrode assembly having both ends respectively connected to one ends of electrode leads of opposite polarities in a pouch case together with an electrolyte and other ends of the electrode leads are exposed to an outside of the pouch case, wherein the electrode leads and a bus bar connecting a first battery cell and a second battery cell, wherein the bus bar comprises a metal layer and a material layer that is normally conductive but may act as a resistor when a temperature rises, and wherein the material layer comprises a gas generating material that is decomposed at a certain temperature or higher to generate a gas and increase resistance.

Abstract: A battery terminal connector assembly for attaching to a terminal post of a battery includes a biasing portion and a post engagement portion. The biasing portion has a first terminal post receiving opening. A biasing wall extends about a circumference of the first terminal post receiving opening. The post engagement portion has a second terminal post receiving opening for receiving the battery terminal post therein. Engagement walls extend about a circumference of the second terminal post receiving opening. The biasing portion is movable relative to the post engagement portion between a first insertion position and a second termination position. As the biasing portion is moved from the first insertion position to the second termination position, the biasing wall engages the engagement walls and moves the engagement walls into mechanical and electrical engagement with the battery terminal post positioned in the second terminal receiving opening of the post engagement portion.

Abstract: A battery module includes a cell stack in which a plurality of unit cells including terminal parts are aligned in a first direction and an insulating member surrounds the plurality of unit cells; and a module housing in which a plurality of receiving parts, into each of which the cell stack is configured to be inserted, are provided and are aligned in a first direction and a second direction perpendicular to the first direction, wherein each of the plurality of receiving parts includes a fixing wall around the cell stack and having at least a portion which is in contact with the cell stack. The cell stacks adjacent to each other in the second direction are electrically connected to each other, and the cell stacks adjacent to each other in the first direction are electrically disconnected from each other, when not connected to an end module.

Abstract: A battery module includes a plurality of secondary batteries, each including an electrode assembly and an electrolyte accommodated in an inner space of an exterior case. The battery module also includes an electrode lead having a body and a plate-shaped head portion. A first end of the body is electrically connected to a positive electrode plate or a negative electrode plate of the electrode assembly, and a second end of the body protrudes outward from the exterior case. The plate-shaped head extends in both directions perpendicular to the protruding direction of the body from the second end. The battery module also includes a bus bar having a plate shape with a slit extending inwardly from one end thereof so as to receive a portion of the body. The electrode lead and the bus bar may be at least partially made of an electrically conductive material.

Abstract: A mechanism for electrically contacting a printed circuit board to a battery cell composite system comprises a printed circuit board, at least one bimetallic element which is fastened to the printed circuit board, at least one cell connector for connecting the battery cell composite system to the printed circuit board, wherein the cell connector contacts the at least one bimetallic element with a connecting element, and a fastening element for fastening the connecting element to the at least one bimetallic element.

Abstract: A power supply device disposes an end plate at each end of a battery stack in a stacked direction of the battery stack, and couples a binding bar to the end plate, so as to fix battery cells. The binding bar includes a plate-shaped bar that extends in the stacked direction, and an engagement block that is provided on a plate-shaped bar and protrudes toward an outer peripheral face of the end plate. The engagement block is inserted into a fixing hole provided in the plate-shaped bar and fixed to an inner peripheral face of the fixing hole. The end plate includes a fitting part, to which the engagement block is guided, on the outer peripheral face of the end plate, and includes a stopper that is disposed closer to the battery stack with respect to the fitting part and abuts the engagement block.

Abstract: A battery module includes a housing and a base of the housing. The base includes at least two opposing partition support walls, a first external wall, and a second external wall that is substantially perpendicular to the first external wall. The base also includes two or more partitions extending between the at least two opposing partition support walls to define compartments within the base, wherein each of the two or more partitions extend in alignment with the first external wall and transverse to the second external wall. Further, each of the two or more partitions is coupled to at least one of the at least two opposing partition support walls via a corresponding movable connection configured to be movable between a first position angled away from the first external wall, and a second position angled toward the first external wall.

Abstract: A battery pack including a plurality of battery cells arranged along a first direction; a holder, the holder including terminal holes exposing terminals of the battery cells, and pairs of first plates separated from each other between adjacent terminal holes and pairs of elastic pieces that are bent from the pairs of first plates in opposite directions along the first direction; and bus bars, each of the bus bars including coupling portions at opposite sides thereof and coupled to adjacent terminal holes, and a central bent portion connecting the coupling portions and extending around corresponding pairs of elastic pieces to surround the corresponding pairs of elastic pieces.

Abstract: A vehicle traction battery assembly including a pair of battery cells and a busbar is provided. Each of the battery cells may include a terminal and one or more locating features. The busbar may span between the cells and define a pair of arms each having a member sized to at least partially interlock with the one or more locating features. The busbar may span between the cells such that the busbar covers at least a portion of upper surfaces defined by each of the cells. At least one of the terminal apertures may be spaced in between outer edges of the respective arms such that a first and second surface area provide space sufficient for weld spots.

Abstract: A power supply device having a battery block with a terminal surface on which terminals of a plurality of battery cells are arranged side by side, and a side plate with an elastic part, a holding part and a body part that extends along the side surfaces of the battery block. The elastic part faces the terminal surface and the holding part faces the bottom surface of the battery block. An insulation part is disposed between the elastic part and the battery block and has a positioning region and a pressing region that are disposed on one surface of the insulation part so as to face the elastic part. The positioning region is provided at an end of the insulation part located at the body part side, and extends to a position that is separated farther away from the elastic part than the pressing region.

Abstract: A secondary battery module incudes a secondary battery, a secondary battery laminate, a busbar, and one pair of lashing plates. The one pair of lashing plates is provided on either end of the secondary battery laminate in a laminating direction. The one pair of lashing plates is connected via a cell block provided so as to face the narrow surface of the secondary battery. The secondary battery laminate is lashed in a state of being pressed in the laminating direction.

Abstract: A battery pack including a plurality of battery cells; and a rigid printed circuit board (PCB) electrically connected to each battery cell and extending across the plurality of battery cells, wherein the rigid PCB includes a bus to electrically connect the plurality of battery cells to each other, and a battery management system (BMS) to control a charge/discharge operation of the plurality of battery cells.

Abstract: In a laser welding step, a laser beam is irradiated fin a thickness direction of an external terminal from a side of a front surface of a bus bar toward a space. This irradiation melts a separated portion of the external terminal, i.e., a portion located apart from the insulating part by the space between the insulating part and the separated portion in the thickness direction, and an opposed portion of the bus bar, i.e., a portion opposed to the space via the separated portion in the thickness direction, thereby forming a welded portion including the separated portion and the opposed portion melted together.

Abstract: Provided is an energy storage device which can sufficiently reduce a resistance of a current path. An energy storage device includes: an outer case having a lid plate on which an external terminal is mounted; a plate having a tab and housed in the outer case; a conductive shaft portion penetrating the lid plate and having one end thereof connected to the external terminal; and a conductive plate portion housed in the outer case, and having a first surface to which the other end of the conductive shaft portion is connected and a second surface to which the tab is connected, wherein a size of the conductive plate portion and a size of the tab are respectively set larger than a size of the external terminal in a planar direction of the lid plate.

Abstract: A prismatic secondary battery including a battery container containing an electric storage element and having first and second wide surfaces and an opening; a lid having first and second through holes and a centerline extending along a length of the lid; a first and second flat plate-like current collector plate inserted into the first and second through holes made of metal materials. A first insertion position of the first current collector plate is spaced at a first distance from the centerline of the lid, the first distance extending in a direction parallel to a top surface of the lid from the centerline toward the first wide surface. A second insertion position of the second current collector plate is spaced at a second distance from the centerline, the second distance extending in a direction parallel to the top surface of the lid.

Abstract: A wiring module that can account for tolerance in an alignment direction of a plurality of power storage devices includes: a first unit row including a plurality of first units linked by a first warping linking portion and a first slide linking portion that enable adjustment of an interval between the plurality of first units, the first warping linking portion having a warping portion and the linking portion having an inner wall and an outer wall; a second unit row including a plurality of second units linked by a second linking portion having an inner wall and an outer wall and enables adjustment of an interval between the plurality of second units, the second unit row being disposed side-by-side with the first unit row; and a row linking portion that has a variable row-interval portion that enables adjustment of an interval between the first and the second unit rows.

Abstract: A welding step involves solid-state welding together an external terminal and a seat portion of an internal terminal by causing the external terminal or the internal terminal to vibrate while detaching an insulator from the external terminal in at least a region surrounding the seat portion and pressing the external terminal against the seat portion.

Abstract: A battery module includes: a battery cell stack including a plurality of battery cells respectively having electrode leads, the plurality of battery cells being stacked on one another; and an interconnect board (ICB) cover to which an electrode lead connection that is bent is coupled, the electrode lead connection comprising an electrode lead of any one of the plurality of battery cells and an electrode lead of another battery cell adjacent to the any one battery cell connected to each other, wherein a plurality of the ICB covers is provided, and the plurality of ICB covers are arranged in different layers.

Abstract: A battery pack fixing apparatus which may effectively prevent a battery pack from being detached or separated from the fixing apparatus and may ensure easy installation regardless of the place where the battery pack is mounted, including a support unit supporting a lower portion of the battery pack and having a support plate with a coupling structure coupled to the lower portion of the battery pack; and a wall fixing unit including a fixing plate located at the rear of the battery pack loaded on the support unit, formed with a plate shape erecting upward, having a lower portion coupled to one side of the support unit and having a coupling structure coupled to a wall located at the rear.

Abstract: A battery module includes battery stacks, a first restraining part, and a plurality of second restraining parts. The first restraining part has: a flat plate part; a plurality of first wall parts that protrude from a main surface of the flat plate part, extend in a stacking direction of the batteries, and are arranged in a first direction; and second wall parts extending in the first direction at end parts of each wall part. The second restraining parts are disposed individually corresponding to the first wall parts and each have: a belt part extending parallel to the flat plate part; a third wall part protruding from the belt part toward the first wall part and extending in the stacking direction; and fourth wall parts extending in the first direction at end parts of the third wall part. There are arranged a plurality of housing spaces for the battery stacks.

Abstract: A method of forming batteries includes feeding a foil through a coating machine. The movement of the foil defines a foil direction. The method applies a first coating band and a second coating band to the foil. The second coating band is spaced from the first coating band by a first tab gap. The foil is cut substantially perpendicular to the foil direction to separate a first coated blank. The first coated blank is cut separate the first coating band and a first portion of the first tab gap, and to separate the second coating band and a second portion of the first tab gap. A first electrode is formed from the first coating band and the first portion of the first tab gap, and a second electrode is formed from the second coating band and the second portion of the first tab gap.

Abstract: A terminal connection structure includes: an output terminal protruding from a surface of an exterior can of a battery and having an inclined surface, in a state that battery and a connection object are aligned, the inclined surface being inclined so as to be away from or close to the surface toward the connection object; and a bus bar having connection surface parallel to the inclined surface on one end side, surface contact between the connection surface and the inclined surface causing the one end side to be electrically connected to the output terminal, another end side being electrically connected to the connection object.

Abstract: A battery cell frame according to an embodiment of the present disclosure includes a bus bar for electrically coupling to an electrode lead of a battery cell, a support member coupled to the bus bar and configured to come into contact with the battery cell to support the battery cell, and a variable length part formed in the support member. The variable length part is configured to change in length to fit a size of the battery cell.

Abstract: When a non-aqueous electrolyte secondary battery in which a positive electrode active material comprising a layered lithium-composite oxide is used for a positive electrode is subjected to charge/discharge under a prescribed condition, in a graph showing the relationship between voltage “V” with discharge during 5th cycle and value dQ/dV from differentiation of battery capacity “Q” with discharge during 5th cycle by voltage “V”, peak intensity ratio “r” represented by the equation: r=|Ic|/(|Ia|+|Ib|+|Ic|) satisfies 0<r?0.25, in which |Ia| is absolute value dQ/dV for a peak top within a range of more than 3.9V to 4.4V or less, |Ib| is absolute value dQ/dV for a peak top within a range of more than 3.5V to 3.9V or less, and |Ic| is absolute value dQ/dV for a peak top within a range of 2.0V or more to 3.5V or less.

Abstract: A cell pack including: a plurality of unit cells arranged in an arrangement direction, each unit cell including a cell case accommodating an electrode body and an electrolytic solution; and a spacer disposed between two unit cells adjacent to each other in the arrangement direction. The cell case has a side surface facing the spacer. At least one of the side surfaces has a pressing region pressed by the spacer and a non-pressing region not pressed by the spacer. An expanding portion bulging in a direction of approaching the spacer is provided in the non-pressing region of the cell case, and a gap between the cell case and the spacer is reduced by the expanding portion.