Abstract: A battery containment system is provided that includes a unitary battery tray having a bottom and walls that from the bottom of said tray and defining a cavity within the tray. A cover is includes having a cover body portion and a first flange extending from the cover body portion, the cover body portion configured to overlie the cavity within the tray and the walls of the tray, the first flange of said cover configured to extend beyond the walls of the tray. A shield having a shield body portion and a second flange extending from the shield body portion, the shield body portion is configured to underlie the bottom of the tray, the second flange of the shield is configured to extend beyond the bottom of the tray and configured to engage the first flange of the cover.

Abstract: The present disclosure provides a battery and an electronic device, which relate to the technical field of batteries and are used for solving the technical problem of poor sealing performance of batteries. The battery includes a shell, a cover assembly and a coiled core assembly located inside the shell; the shell is provided with an opening, and the cover assembly sealingly covers the opening; the cover assembly includes a conductive member, a top cover and a sealing member between the conductive member and the top cover; the conductive member electrically contacts the coiled core assembly; the sealing member is provided with a first through hole, the top cover is provided with a second through hole, and a diameter of the first through hole is smaller than that of the second through hole.

Abstract: A connector with increased durability is provided. A connector includes a mount electrically connected to a battery management unit configured to manage voltages of a plurality of battery cells; a first clip terminal and a second clip terminal configured to be elastically deformable and configure to contact a counterpart connection terminal; and a terminal housing including a side wall configured to electrically insulate the first clip terminal and the second clip terminal from an outside, wherein each of the first clip terminal and the second clip terminal includes a connection portion having a part configured to contact the counterpart connection terminal inserted between the first clip terminal and the second clip terminal; and a support portion extending from the connection portion and configured to be supported by the sidewall of the terminal housing.

Abstract: Techniques are disclosed for systems and methods to provide modular battery assemblies for micro-mobility fleet vehicles. A modular battery assembly for a micro-mobility fleet vehicle includes a battery assembly enclosure including an assembly retention interface configured to physically secure the assembly enclosure to a subframe assembly of the micro-mobility fleet vehicle, a battery cell assembly disposed within the battery assembly enclosure, and an enclosure lid mounted to the assembly enclosure. The modular battery assembly may include an arched floorboard panel configured to provide a floor board surface for the micro-mobility fleet vehicle. The battery cell assembly may include a honeycomb battery cell holder and a collector board atop the battery cell holder to provide wire bond interconnects between the battery cells.

Abstract: A battery producible with high quality and at low costs by decreasing the output of an energy beam used to weld multiple current collecting tabs to an outer case and thus securing the sufficient margin of the output thereof. An aspect of the battery includes an overlapping part K of multiple current collecting tabs connected to a negative electrode of an electrode body being welded to an outer case via a weld group, and the weld group includes a weld part and weld part that are each in the form of a line when they are viewed from the outside of the outer case. The weld as a first weld serves to weld the outer case to all of the multiple current collecting tabs, and the weld as a second weld serves to weld the outer case to only one or some of the multiple current collecting tabs.

Abstract: A laminated secondary battery that includes an electrode assembly and an electrolyte accommodated in an exterior body. In the electrode assembly, a positive and negative electrode laminate body including an electrode current collector and electrode multi-units having two or more electrode material layers formed on the electrode current collector with non-forming regions interposed between them is bent in the non-forming regions of the electrode multi-unit, and the electrode multi-units have a collector tab extended from sides adjacent to the non-forming regions among all sides defining the two or more electrode material layers in a plan view thereof before being bent.

Abstract: The invention relates to an energy storage system for a vehicle, in particular a starter battery for a vehicle, having a plurality of energy storage cells for providing and/or storing electric energy and a housing which has a plurality of wall elements that delimit the interior of the housing. The housing is designed to receive the plurality of energy storage cells in the interior of the housing. A plurality of separating walls are arranged in the interior of the housing in order to divide the interior of the housing into a plurality of chambers, wherein each chamber is designed to receiving an energy storage cell. A fluidic connection is formed between the individual chambers, and a ventilation valve is arranged on one of the wall elements, preferably a cover element, of the housing in a respective region paired with the corresponding chamber. At least one of the ventilation valves is an active ventilation valve, and the remaining ventilation valves are blind closures.

Abstract: Fixtures for releasably holding a sensor having a first sensor portion and a second sensor portion, methods for making such fixtures, and methods for installing a sensor harness, are provided. In one example, a fixture includes a clip portion that is configured to hold a first sensor portion of a sensor. A support portion is coupled to and extends away from the clip portion. An arm portion is coupled to and extends away from the support portion. The arm portion is configured to hold a second sensor portion of the sensor. The fixture has a frangible seam formed therein that ruptures in response to an applied force for removing the fixture from the sensor.

Abstract: The present application discloses a rechargeable lithium battery apparatus, comprising a battery cell in a cylindrical shape, a positive electrode of the battery cell has a protection circuit board arranged, wherein, between the positive electrode of the battery cell in the cylindrical shape and a positive electrode of the protection circuit board, there is a metal screw connection structure arranged, acting as the positive electrode of the protection circuit board, connecting electrically to the positive electrode of the battery cell. The rechargeable lithium battery apparatus of the present application, due to adopting a metal screw connection structure arranged on a circuit board at the positive electrode of the battery, corresponding to the positive electrode of the battery cell, achieves a positive electrode cap and a solid connection between the protection circuit board and the battery cell, forming a brand new lithium battery apparatus.

Abstract: A rechargeable battery pack has a cell block. The cell block has a plurality of rechargeable battery cells, wherein at least some of the rechargeable battery cells are physically arranged consecutively from a first cell block end of the cell block in at least a first direction to a second cell block end of the cell block and are electrically connected in series. The battery pack includes an electronics unit, wherein the electronics unit has a measurement electronics part.

Abstract: A surface-treated steel sheet for battery cases is provided which comprises a nickel-cobalt alloy layer formed at the outermost surface of a plane to be an inner surface of a battery case, wherein a Co/Ni value at the surface of the nickel-cobalt alloy layer is within a range of 0.1 to 1.5 as determined by Auger electron spectroscopy analysis.

Abstract: A pouched energy storage device can include a cell housing portion and a sealed portion. The device can also include a stack of electrodes housed within an inner region of the cell housing portion. Each electrode can have dimensions of width, length, and thickness. One or more electrodes can have at least one of the dimensions smaller than a corresponding dimension of other electrodes in the stack of electrodes. The device can also include an indentation on the cell housing portion adjacent the sealed portion. The indentation can form a stepped region in the inner region that is complimentary to the one or more electrodes having at least one of the dimensions smaller than a corresponding dimension of other electrodes in the stack of electrodes. The sealed portion can be folded onto the cell housing portion so that at least a part of the sealed portion resides in the indentation.

Abstract: The present disclosure relates to a battery module and a battery pack. The battery module comprises two or more secondary batteries arranged side by side in a first direction, each of which includes a case, an electrode assembly and a closing portion, wherein the case has a receiving hole comprising an opening and extending in a second direction, and the first direction intersects with the second direction, wherein the closing portion is sealingly connected with the case to close the opening, the electrode assembly is disposed in the receiving hole and includes two or more electrode units, the electrode unit includes a first electrode plate, a second electrode plate and a separator, and the two or more electrode units are stacked in the second direction.

Abstract: An electrode includes one or more intermediate layers positioned between a substrate and an electrochemically active material. Intermediate layers may be made from chromium, titanium, tantalum, tungsten, nickel, molybdenum, lithium, as well as other materials and their combinations. In certain embodiments, an active material includes one or more high capacity active materials, such as silicon, tin, and germanium. These materials tend to swell during cycling and may loose mechanical and/or electrical connection to the substrate. A flexible intermediate layer may compensate for swelling and provide a robust adhesion interface. Methods of fabricating electrodes involve forming metal silicide nanostructures.

Abstract: Disclosed is a battery pack, which includes a battery module having a plurality of battery cells; a pack housing configured to accommodate the battery module; and a flexible rib formed at an inner side of the pack housing and having elasticity, the flexible rib pressing the battery module in contact with the battery module.

Abstract: An energy storage device includes: an electrode assembly; a case configured to store the electrode assembly; a conductive member electrically connected to the electrode assembly; a first insulating member disposed between a wall of the case and the conductive member; and a projection protrudingly provided on the wall on an opposite side to the first insulating member, wherein the first insulating member has a first engaging portion configured to engage with a limiting portion, the limiting portion being a portion of a recess formed on the wall on an opposite side to the projection.

Abstract: The present disclosure provides a cylinder type battery cell manufacturing apparatus which is an apparatus configured to form a crimping portion on a cap assembly coupling portion of a cylinder type battery cell, the manufacturing apparatus including: a primary crimping mold configured to apply a primary pressure so that an open upper end portion of a cylinder type metal can forms an inclination inclined to a central axis of the metal can on a vertical section in a state in which a cap assembly is coupled to the open upper portion of the cylinder type metal can; and a secondary crimping mold configured to apply a secondary pressure to the open upper end portion in which the inclination is formed so that a flat section parallel to a lower surface of the metal can is formed in the crimping portion.

Abstract: The invention relates, inter alia, to an assembly for fastening an upper shell or a lid to a lower shell of a battery housing, said assembly having at least one fastening element, by means of which the upper shell or the lid is or can be frictionally connected to the lower shell in the region of contact flanges, which correspond with each other and are laid one over the other. The at least one fastening element is formed by a rail element that has a U-profile-shaped cross-section at least in some sections which rail element has a web and an upper and a lower flange and is or can be slid onto the contact flanges from the end edges of the contact flanges, which are laid one over the other, and is or can be at least frictionally connected to the contact flanges as a result of a subsequent movement in the longitudinal direction of the contact flanges.

Abstract: A rolling device for an electrode including an all-solid electrolyte layer, the rolling device including: a first roller including a plurality of first protrusions protruding from a surface of the first roller; and a second roller opposite the first roller, wherein the second roller comprises a plurality of second protrusions on a surface of the second roller.

Abstract: A lithium secondary battery includes a wound electrode group and a lithium-ion conductive nonaqueous electrolyte. The wound electrode group includes a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode. The negative electrode includes a negative electrode current collector. The negative electrode current collector includes: a layer having a first surface facing outward of the winding of the electrode group and a second surface facing inward of the winding of the electrode group; first protrusions protruding from the first surface; and second protrusions protruding from the second surface. Lithium metal is deposited on the first surface and the second surface by charging. A second average height of the second protrusions is higher than a first average height of the first protrusions.

Abstract: A nickel-plated heat-treated steel sheet for a battery can, having a nickel layer with a nickel amount of 4.4 to 26.7 g/m2 on a steel sheet. When the Fe intensity and the Ni intensity are continuously measured along the depth direction from the surface of the nickel-plated heat-treated steel sheet for a battery can, by using a high frequency glow discharge optical emission spectrometric analyzer, the difference between the depth at which the Fe intensity exhibits a first predetermined value and the depth at which the Ni intensity exhibits a second predetermined value is less than 0.04 ?m.

Abstract: Disclosed is a lithium secondary battery capable of preventing the battery life from being reduced. The lithium secondary battery includes a cathode, an anode including silicon, a separator positioned between the cathode and the anode, and an electrolyte including flouoroethylene carbonate (FEC), wherein a weight ratio of the silicon to the FEC is about 0.4 to about 0.8.

Abstract: A jelly roll tape for a rechargeable battery and a rechargeable battery having the same are disclosed. In one aspect, the jelly roll tape includes a first adhesive layer configured to develop an adhesive property based at least in part on a reaction with an electrolytic solution and a second adhesive layer formed on at least one surface of the first adhesive layer. The second adhesive layer is formed at least partially of a rubber-based material.

Abstract: A service plug includes a body portion including a pair of power bus bars that are connected to a power supply circuit by being connected to a first terminal of a connector, a switching lever portion including an interlock terminal that brings the power supply circuit into a closed state when being in a state of conduction with a second terminal of the connector, and brings the power supply circuit into an open state when being in a state of non-conduction with the second terminal of the connector, and a power interruption portion that brings the interlock terminal 32 of the switching lever portion into a state of non-conduction with the second terminal to bring the power supply circuit into an open state by using an actuator that is operated in accordance with a collision detection signal for a vehicle.

Abstract: Arrangements for retaining coiled battery internals in a coiled orientation within a cell casing, in which end caps and/or sleeves are provided with at least one inward-facing protuberance for engaging and securing the coiled battery internals, and means for securing and aligning pouch cell batteries within a sleeve.

Abstract: The present disclosure relates to a positive electrode active material which reduces lithium by-products and improves structural stability and includes a lithium-nickel based transition metal composite oxide in which an alkaline earth metal having oxidation number of +2 is doped and a phosphate coated layer formed on the outer surface of the composite oxide. Accordingly, a second battery including the positive electrode active material has excellent capacity characteristics, and also improves structural stability during charging/discharging and prevents swelling, thereby being capable of exhibiting excellent life characteristics. Therefore, the present invention may be easily applied to industry in need thereof, and particularly to electric vehicles industry requiring high capacity and long-term life characteristics.

Abstract: A battery pack is provided. The battery pack including a plurality of battery cells; a cell holder including a peripheral wall and a plurality of cell storage units; and a plurality of ribs integrally molded with the cell holder between the peripheral wall of the cell holder and the cell storage unit.

Abstract: A battery module having a plurality of battery cells is described. The battery module includes a head unit with corresponding conical positive and negative terminals that allow additional battery modules to mate together and be electrically coupled in an end-to-end relationship. A plurality of battery modules can be combined together into rows of modules that are the electrically coupled to form a multi-modular battery system. The multi-modular battery system uses interchangeable individual battery modules for ease of replacement. Battery modules of a multi-modular battery system can communicate with each other using optical communication methods, including via line-of-sight and/or optical cables.

Abstract: An enhanced anode includes a modulated body which improves anode current output efficiency by maximizing the surface area to increase surface area to weight ratio. A toroidally modulated embodiment of the enhanced anode enlarges surface area by 48 percent increasing current output efficiency by 48 percent, only increases weight by three percent, and improves surface/weight ratio 44 percent, compared to know cylindrical anodes. The enhanced anode is preferably made from cast iron or other suitable materials (e.g. magnesium, zinc, aluminum) as well, and the design of the improved anode is applicable to galvanic cast anodes in general. The enhanced anode is suitable for molding and casting and does not increase production costs.

Abstract: Proposed is a novel negative electrode for nonaqueous electrolyte secondary batteries in which the battery capacity does not decrease even when charging and discharging are repeated. Proposed is a silicon-containing negative electrode active material for nonaqueous electrolyte secondary batteries, comprising negative electrode active material particles which are provided with a surface layer containing carbon and titanium or aluminum on the entirety or a portion of the surface of the active material.

Abstract: A curved secondary battery and a method of manufacturing the same, the curved secondary battery including an electrode assembly having a curved shape; and a pouch that accommodates the electrode assembly, wherein the pouch includes a first encapsulation sheet on a curved first surface of the electrode assembly, the first encapsulation sheet having a portion with a same curvature as the first surface; a second encapsulation sheet on a curved second surface of the electrode assembly, the second encapsulation sheet having a portion with a same curvature as the second surface; and an attaching portion that has a planar shape, the attaching portion being formed when a first boundary portion of the first encapsulation sheet and a second boundary portion of the second encapsulation sheet are attached to each other.

Abstract: A product may include a battery pack, and a housing may receive the battery pack. The housing may comprise a plastic containing an additive that is electrically insulating and that has a greater thermal conductivity than the plastic.

Abstract: A secondary battery includes an electrode assembly including a first electrode, a separator, and a second electrode, sequentially stacked and wound. The secondary battery further includes a series of first electrode tabs electrically connected to the first electrode and extending to an outside of the electrode assembly. The series of first electrode tabs includes inner and outer tabs respectively located proximate to and distal to the center axis of the electrode assembly. The outer tab is connected to the inner tab at the outside of the electrode assembly. A length along the inner tab from a point where the inner tab extends from the electrode assembly to a point where the inner tab is connected to the outer tab is different from a length along the outer tab from a point where the outer tab extends from the electrode assembly to a point where the outer tab is connected to the inner tab.

Abstract: A carbon dioxide composite getter comprising a CO2-permeable envelope containing powders of two active materials and sealed systems employing the carbon dioxide composite getter.

Abstract: A secondary battery includes: a cylindrical can including a first region, a second region, and a first bent portion extending between the first region and the second region on a circumferential surface of the can; an electrode assembly accommodated in the can; and a cap assembly at a top end of the can and sealing the can. The first bent portion is bent such that an angle between the first region and the second region is in a range of about 90° to about 100°; the first region of the can partially covers a top surface of the cap assembly facing an exterior side of the can, and the second region of the can surrounds side surfaces of the cap assembly.

Abstract: The present disclosure provides a cathode active material comprising: lithium transition metal oxide-based particles; and a titanium dioxide coating layer formed on a part or a whole of a surface of the particle, in which the titanium dioxide coating layer is a partially reduced TiO2?x (0<x<2), a preparation method thereof, and a lithium secondary battery including the cathode active material. The cathode active material of the present disclosure may significantly improve electrochemical properties of an electrochemical device including the cathode active material, preferably a lithium secondary battery by decomposing lithium-containing impurities remaining on the surface of the cathode active material by a partially reduced titanium dioxide coating layer formed on the surface of the cathode active material and enhancing the electrical conductivity of the cathode active material.

Abstract: A rechargeable battery includes a cap plate which closes and seals an opening of a case. The cap plate includes a welded portion, an adhesive portion, and a separated portion. The welded portion is welded to the opening of the case. The adhesive portion is recessed in the welded portion by a thickness of the case, and is thicker than the welded portion to protrude inward. A lateral surface contacts an inner surface of the opening. The separated portion is connected to the adhesive portion, is further recessed in a thickness direction of the case, and is separated from the inner surface of the opening.

Abstract: A traction battery assembly may include an array of battery cells having opposing end faces, opposing side faces, and a bottom face. The assembly may also include a pair of end plates and a pair of side plates arranged to form a four-sided enclosure around the end and side faces and configured to compress and retain the cells without being mechanically attached thereto or covering the bottom face. The side plates may partially cover an upper portion of the array. The side plates may have a lower horizontal edge, an upper horizontal edge, and at least one diagonal reinforcement rib configured to extend from a location where the vertical edge and lower horizontal edge meet upward to the upper horizontal edge.

Abstract: According to one embodiment, a secondary battery is provided. The secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode current collector including elemental zinc, and a negative electrode layer disposed on the negative electrode current collector. The negative electrode layer includes a negative electrode active material including at least one compound selected from the group consisting of an oxide of titanium, a lithium-titanium oxide, and a lithium-titanium composite oxide. The electrolyte solution includes an aqueous solvent and an electrolyte.

Abstract: In a spirally-wound electrode, in a first region, short sides of first and second separator sheets on an inner side are aligned with each other. In a second region, a negative electrode sheet, the first separator sheet, a positive electrode sheet, and the second separator sheet are arranged from an inner side toward an outer side in a radial direction. The second region extends from a position where short sides of the negative and positive electrode sheets on the inner side are aligned with each other in a same phase to a short side of the positive electrode sheet on an outer side. In a third region, the negative electrode sheet, and the first and second separator sheets are arranged from the inner side toward the outer side in the radial direction. The third region extends to a short side of the negative electrode sheet on the outer side.

Abstract: To provide a method for producing a positive electrode active material layer for lithium ion battery that can improve durability and internal resistance of lithium ion battery, and particularly lithium ion battery that operates at high voltage. The method for producing positive electrode active material layer for a lithium ion battery includes coating a substrate with positive electrode mixture slurry containing positive electrode active material, first lithium salt, second lithium salt and solvent, and drying off the solvent. First lithium salt is lithium phosphate, the second lithium salt is selected from the group including of lithium carbonate, lithium hydroxide, lithium nitrate, lithium acetate, lithium sulfate and combinations thereof, and the proportion of the second lithium salt with respect to the first lithium salt is 1 to 50 mol % based on the number of lithium atoms.

Abstract: An embodiment discloses the present disclosure includes a transducer having a yoke. The yoke includes a pair of arms. The yoke further includes a layer high permeability steel located between the pair of arms. The yoke also includes a metal coil wrapped around a post located at a central location on the layer of high permeability steel. The apparatus also includes a pair of permanent magnets attached to the single layer high permeability steel, where the permanent magnets each flank the post. The apparatus further includes a pair of springs, each includes a first end and second end, where the first end of each spring is attached to one of the respective arms. Yet further, the apparatus includes a diaphragm coupled to the second end of each spring configured to vibrate in response to a signal supplied to the metal coil.

Abstract: A power storage device which has high charge/discharge capacity and less deterioration in battery characteristics due to charge/discharge and can perform charge/discharge at high speed is provided. A power storage device includes a negative electrode. The negative electrode includes a current collector and an active material layer provided over the current collector. The active material layer includes a plurality of protrusions protruding from the current collector and a graphene provided over the plurality of protrusions. Axes of the plurality of protrusions are oriented in the same direction. A common portion may be provided between the current collector and the plurality of protrusions.

Abstract: An energy storage unit having plural energy storage devices, each of which includes a container housing an electrode assembly and positive and negative electrode terminals electrically connected to the electrode assembly and extending from the container in the same direction, includes: a bus bar electrically connecting a first terminal, which is one of the positive electrode terminal and the negative electrode terminal of a first energy storage device included in the plural energy storage devices, and a second terminal, which is one of the positive electrode terminal and the negative electrode terminal of a second energy storage device included in the plural energy storage devices and opposite in polarity to the first terminal; a packing member interposed between the first terminal and the container of the first energy storage device; and an insulating member interposed between the bus bar and the container of the first energy storage device.

Abstract: A cable-type battery comprising: at least a first strand of a first polarity type, at least a second strand of a second polarity type, the second polarity type being the opposite of the first polarity type, an electrolyte layer in which the first strand and the second strand are arranged, the electrolyte layer being ionically conducting and electrically insulating, the first strand being ionically connected to the second strand. The first strand is coated by a spacer layer, the spacer being electrically insulating, the spacer being configured to prevent any direct contact between the first strand and the second strand. The strength of the material forming the spacer is greater than the strength of the material forming the electrolyte layer.

Abstract: The present disclosure refers to a secondary battery comprising a reinforcing material in the fore part of an electrode current collector used in a jelly-roll type electrode assembly, thereby making the jelly-roll type electrode assembly wound in the predetermined position and eventually solving the problem an internal short-circuit due to biased movement.

Abstract: A lithium-ion secondary battery including a negative electrode including negative-electrode active-material particles including an element being capable of sorbing and desorbing lithium ions, and being capable of alloying with lithium; or/and an elementary compound including an element that is capable of alloying with lithium; a positive electrode including a positive-electrode active material that enables Li ions to be sorbed therein and desorbed therefrom; and an electrolytic solution made by dissolving an electrolyte in a solvent. The negative-electrode active-material particles include particles whose particle diameter is 1 ?m or more in an amount of 85% by volume or more thereof when the entirety of said negative-electrode active-material particles, which are included in said negative electrode, is taken as 100% by volume, and the negative-electrode active-material particles exhibit a “D10” being 3 ?m or more. The solvent in the electrolytic solution includes a fluorinated ethylene carbonate.

Abstract: A rechargeable battery includes an electrode assembly having first and second electrodes at opposite sides of a separator and wound about an axis; a first terminal coupled to the first electrode through a first tab; a second terminal coupled to the second electrode through a second tab; a case accommodating the electrode assembly and including first and second openings at its opposite ends; a first gasket between the first terminal and the first opening, the first gasket sealing the first opening and allowing the first terminal to protrude outside of the case; and a second gasket between the second terminal and the second opening, the second gasket sealing the second opening and allowing the second terminal to protrude outside of the case. The case may further include a fixing portion at its inner side that protrudes toward the electrode assembly.

Abstract: The present application relates to the filed of energy storage devices, and in particular, relates to a cathode sheet and a lithium ion electric roll using the cathode sheet. The cathode sheet comprises a cathode current collector, an active substance layer, a cathode tab, a head protective adhesive, a tail protective adhesive, an ending adhesive, and an anti-puncture cushion. The cathode current collector comprises a head exposed zone, a head adhesive application zone, a coating zone, a tail adhesive application zone, and a tail exposed zone. The active substance layer covers the coating zone, the head protective adhesive covers the head adhesive application zone, the tail protective adhesive covers the tail adhesive application zone, the ending adhesive is bonded to a tail of the tail exposed zone, and the anti-puncture cushion is connected to the tail exposed zone.

Abstract: A battery pack includes: a plurality of battery cells (1); a cell support that holds the plurality of battery cells; a connection part (6) that connects to the plurality of battery cells; and a circuit substrate (8) that is used to mount circuits for the plurality of battery cells. The cell support (2) is integrally formed with battery cell storage units (3) that store the plurality of battery cells, a base unit (4) that supports the battery cell storage units, and impact relaxation ribs (21), and each of the impact relaxation ribs is formed between an outer circumference of the base unit and an exterior surface of each of the battery cell storage units, and is configured in a shape capable of being transformed in a direction to which impact is applied.