Abstract: Modular digital camera systems, such as modular digital still and motion cameras are disclosed. Individual modules may be removed from the system and replaced, such as to benefit from upgraded technology, while preserving the remaining modules in the system. According to certain aspects, the modular camera system includes cellphone functionality and multiple cameras.

Abstract: The present application provides an explosion-proof valve, a battery pack, and an electric vehicle. The explosion-proof valve includes a first connection member, a second connection member, a resilient connection member, and an explosion-proof film. An upper port is formed on the first connection member that includes an ejector pin. The second connection member is disposed at an interval from the first connection member. The first and second connection members are tightly in a sealed connection with the resilient connection member. The explosion-proof film is disposed at the upper port and seals the upper port, and the explosion-proof film is located above the ejector pin. Because the explosion-proof valve is directly disposed on a base plate of a case in a vehicle body using the first and second connection members, the explosion-proof valve can fully use narrow space between the base plate of the battery pack and the vehicle body.

Abstract: A battery module is used to accommodate a battery and includes an external card bracket, a battery case, a battery cover, and at least one elastic member. The external card bracket includes at least one first locking portion. The battery case includes at least one second locking portion and at least one first assembly portion. The first locking portion is detachably locked with the second locking portion so that the battery case is assembled onto the external card bracket. The battery cover includes at least one second assembly portion. The second assembly portion is detachably assembled to the first assembly portion such that the battery case and the battery cover define a storage space. The battery is disposed in the storage space. The elastic member is located on the second assembly portion and connects the battery case and the battery cover to limit displacement of the battery cover.

Abstract: The present disclosure includes a method that includes receiving, via a processor disposed within a lithium ion battery module, a voltage signal associated with a resistor coupled to a negative terminal of the lithium ion battery module. The negative terminal of the lithium ion battery module is coupled to a negative terminal of a lead acid battery module. The method also includes determining, via the processor, one or more properties associated with the lead acid battery module based on the voltage signal.

Abstract: A battery box including a lower box body, where the lower box body includes a first plate and a second plate. The first plate includes: a bottom wall; a peripheral wall connected to a periphery of the bottom wall and extending upward; and the bottom wall and the peripheral wall form an accommodating space opening upwards; the second plate is fixed to the bottom wall from a bottom and engages with the bottom wall to form a flow passage. The second plate is provided with: a second protrusion protruding to the first plate from a side facing away from the first plate and extending along a transverse direction; and an opening running through the second protrusion in a height direction and extending along the transverse direction, the second protrusion of the second plate being connected to the bottom wall of the first plate in a sealed manner.

Abstract: The present application provides a battery case and a battery module. The battery case includes a bottom plate; and a plurality of circumferentially spaced extensions formed by extending horizontally outward along the bottom plate, and each extension is bended at least once to form a case side arm, and a cavity of the battery case is enclosed by the case side arms and the bottom plate, and end faces for connection of the case side arms are bended to form connecting portions, and two adjacent connecting portions are snap-fitted to fix the adjacent case side arms to each other.

Abstract: An orthopedic device, first and second struts, and a range-of-motion limiting pivot assembly connecting to the first and second struts. The pivoting assembly having an engagement member linked to a tab disposed and arranged for pulling radially outward away from a central axis of the pivoting assembly for adjusting the range of motion of the pivoting assembly.

Abstract: A method and system provide a plurality of power cell modules. The power cell modules can be stacked together such that they are electrically connected and share a collective multi-voltage bus. Electronic appliances can be connected to one of the power cell modules to be powered by all of the connected power cell modules. Power cell modules can be easily added or removed from the bank without interrupting the supply of power to the electronic appliance.

Abstract: Embodiments of the present disclosure provide a control modular assembly for a switch. The control modular assembly according to embodiments of the present disclosure comprises: a base housing (203) adapted to carry an operating member for controlling the switch and formed with a base housing notch (206) at an edge of the base housing (203); a first battery (100) being rechargeable and operable to be detachably mounted in the base housing (203) through the base housing notch (206), thereby supplying electric power to the operating member; and a second battery (205) arranged within the base housing (203) to supply electric power to the operating member when the first battery (100) is taken out of the control modular assembly (200), wherein the second battery (205) is chargeable by the first battery (100).

Abstract: The invention relates to an energy storage unit (1) comprising a plurality of energy storage sub-units (5) that have a first electrode (6) and a second electrode (7), the first electrode (6) and second electrode (7) of a particular energy storage sub-unit (5) being arranged on opposite sides of said energy storage sub-unit (5), and said energy storage unit comprising a receiving device (2) that has a plurality of adjacently-arranged receiving units each spatially delimited by a lateral wall, one energy storage sub-unit (5) being introduced into each receiving unit of said receiving device (2), and the energy storage sub-units (5) being secured in said receiving units such that the electrodes (6, 7) are arranged in a first contact level and in a second contact level, the electrodes (6, 7) arranged in the first contact level being electrically interconnected by means of a first printed circuit board (10) and the electrodes (6, 7) arranged in the second contact level (9) being electrically interconnected by mean

Abstract: A power storage device includes a storage battery that stores electric power, a battery management unit that monitors and protects the storage battery, an inverter configured to convert DC power outputted from the storage battery into AC power and outputting the AC power, and convert externally supplied AC power into DC power and supplying the DC power to the storage battery, a liquid storage container that houses therein the storage battery, the battery management unit, and the inverter in a state where surroundings of the storage battery, the battery management unit, and the inverter are filled with a liquid, a temperature adjustment unit that performs heat transfer between the liquid and outside air to adjust a temperature of the liquid to a particular target temperature, and a heat insulating material arranged to surround the liquid storage container.

Abstract: This disclosure details electrified vehicles that are equipped with one or more attachment and sealing assemblies for securing a battery pack to vehicle body components. An exemplary attachment and sealing assembly may establish a mid-span attachment point of the battery pack. The attachment and sealing assembly may include an attachment column and a sealing ring that cooperate to secure the battery pack to the vehicle and to seal openings formed through the battery pack and the vehicle body component.

Abstract: A battery housing for receiving battery elements, in particular for a vehicle, includes a case formed by a frame including one or more profiles and at least one first floor. The case provides an interior region for the battery elements. A second floor is positioned at a distance below the first floor and defines a space with the first floor. A cover covers the case.

Abstract: A heated garment system in one embodiment includes a jacket, a wiring circuit embedded within the jacket and configured to generate heat, a battery assembly configured to removably couple with the wiring circuit, the battery assembly including a power button for selectively applying power to the wiring circuit, and a battery holder configured to removably receive the battery assembly.

Abstract: A battery-powered window treatment, such as a roller shade, may include a battery compartment that provides access to batteries while the window treatment is assembled and mounted to a structure. The battery compartment may be pivotally supported by a housing of the window treatment, and operable between opened and closed positions. The batteries may be concealed when the battery compartment is closed, and may be accessible when the battery compartment is open. The battery compartment may be operated opened and closed while a shade of the window treatment is at any position, such that removal of the batteries does not result in the loss of tracking information for the shade. The window treatment may include a fascia that is operably connected to the battery compartment, such that when the battery compartment is opened, the fascia does not obstruct access to the batteries, and does not interfere with the shade.

Abstract: Disclosed herein is a battery pack case configured to receive a battery module assembly including a plurality of battery modules, each having a plurality of battery cells or unit modules mounted therein, sequentially stacked, wherein a coolant inlet port and a coolant outlet port are located at the upper part and the lower part of the battery pack case, respectively, in a state in which the coolant inlet port and the coolant outlet port are opposite to each other such that a coolant for cooling the unit modules flows from one side of the battery modules to the opposite side of the battery modules in a direction perpendicular to a direction in which the unit modules are stacked, and an inclined plate for guiding the flow of the coolant is provided between the battery pack case and the battery modules.

Abstract: A vehicle includes an electric equipment and a cable connected to the electric equipment, a cable connection portion of the electric equipment is disposed on one side of the vehicle in a front-rear direction, and the cable connection portion is disposed closer to the other side in the front-rear direction than an end surface on the one side in the front-rear direction of the electric equipment and at a position lower than an uppermost surface of the electric equipment. The cable includes a first wire portion extending from the cable connection portion to one side of the vehicle in the width direction; a second wire portion continuously extending to the other side in the front-rear direction, and a third wire portion continuously extending to the other side in the width direction, and the cable is disposed along an upper surface of the electric equipment.

Abstract: A holding arrangement for multiple electrodes, with at least two holding frames, which can be stacked flat one on top of another. With the holding arrangement, a large number of electrodes, which also form more than one stack spark gap, can be arranged especially simply relative to one another, such that, in the individual holding frames, in each case at least two recesses for accommodating one electrode per recess are formed next to one another, whereby the contour of the individual recesses is matched to the outside dimensions of the individual electrodes, and in that the individual holding frames can be connected to one another.

Abstract: A battery fastening system for fastening a battery (4) in a vehicle (60) comprises a battery tray (1) having a length direction (LD) and a width direction (WD), a first corner fastening device (7) and a second corner fastening device (8), wherein the second corner fastening device (8) is securable to the battery tray (1) in at least two different positions in the width direction (WD) for enabling fastening of batteries (4) with at least two different sizes in the width direction (WD). The battery fastening system further comprises a clamping element (9) for limiting movement of the battery (4) towards a second side (27) in the length direction (LD). The clamping element (9) is securable to the battery tray (1) in at least two different positions in the length direction (LD) for enabling fastening of batteries (4) with at least two different sizes in the length direction (LD). In addition, it is also provided a corresponding method for fastening a battery in a vehicle.

Abstract: A battery pack, including a battery cell; and a case having a receiving space for the battery cell, the case including a frame member including an opening formed in a central portion thereof and having an inner surface facing the receiving space and an outer surface opposite the inner surface; a first cover on the frame member, the first cover including a flange portion supported on the inner surface of the frame member, a main body exposed through the opening of the frame member, and a connecting portion connecting the flange portion to the main body in a stepped manner; and a second cover coupled to the frame member, the battery cell being between the second cover and the frame member.

Abstract: An apparatus includes a propulsion module for a vehicle, and a control module communicatively connected to the propulsion module. The propulsion module is structured to be detached from the vehicle for mechanical connection to an off-board device. The propulsion module includes an electric motor and a power supply, and the power supply is operable to power the electric motor to output mechanical power. The control module is configured to receive a connection status of the propulsion module. In response to the connection status indicating that the propulsion module is detached from the vehicle, the control module is configured to operate the power supply at an off-board rated power to power the electric motor.

Abstract: A power storage device includes a plurality of series-connected battery cells and a balance circuit board. The balance circuit board includes: a heat-generating element (1121) that is provided for each of the plurality of battery cells, and is connected with the corresponding battery cell; and a first temperature sensor that is arranged within a range sandwiched between heat-generating elements positioned at both ends in an arrangement direction of a plurality of heat-generating elements (1121).

Abstract: A battery lock device for a forklift includes a lock plate capable of moving between a first position and a second position. The lock plate at the first position is configured to keep a battery from being protruded. The lock plate at the second position is configured to enable the battery to be protruded. The battery lock device includes a shaft configured to rotatably support the lock plate with respect to a body, a fixed portion opposed to the lock plate, a lock pin capable of sliding toward the fixed portion in a first direction and away from the fixed portion in a second direction, and a spring configured to press the lock pin in the first direction. First and second holes are provided in the fixed portion. The lock pin is inserted into the first and second holes.

Abstract: Provided is an electronic device including: a battery; a housing; a battery tape adhering the battery and the housing; a display screen provided at a front surface of the housing; a display tape adhering the display screen and the housing; a chamber adjacent to the battery; and an air path that connects to the chamber that prevents the chamber from being airtight. Such an electronic device may prevent the display screen from being deformed due to heat and air expansion caused by a temperature change in the chamber.

Abstract: A mobile telephone case that includes a housing structured to receive a mobile telephone, the housing includes a perimeter frame disposed about a perimeter of the mobile telephone to substantially cover and protect the mobile telephone, an at least partially open front face to provide access to a display screen of the mobile telephone, and a protective rear panel that is at least partially movable between an open orientation and a closed orientation when the housing is operatively disposed on the mobile telephone. The protective rear panel substantially covers and protects a rear surface of the mobile telephone when in the closed orientation, with at least a portion thereof being at least partially separable from the perimeter frame to define the open orientation that provides wireless charging access to the rear surface of the mobile telephone with the housing still disposed on the mobile telephone.

Abstract: Methods, devices, and systems for a universal modular battery and power system are provided. The universal modular battery may include a number of modular interconnection features that enable a number of universal modular batteries to be stacked for use in a universal battery power system. The modular interconnection features facilitate the modular addition or subtraction of batteries in the universal battery power system to, among other things, alter a power capacity of the system. The universal batteries in a power system may be exchanged, swapped, or moved from one power system to another, including power systems associated with different vehicles and/or buildings.

Abstract: The heat pipes 9a provided here in the grooves 9 of the motor side conduct heat to the end of the output shaft 2 and the heat pipes 10a in the grooves 10 of the housing of the power supply to the opposite end. A flow of heat to axially opposing ends is thus produced that always travels away from the power electronics that are arranged approximately in the center of the system.

Abstract: A battery housing can include a housing body defining a cavity sized and shaped to receive a cell for a battery, and a breaker coupled with the housing body. The battery housing can comprise a first electrical conductor at a first end portion of the housing body and electrically connected to the switch, the first electrical conductor configured to electrically connect to a first battery cell terminal of the cell. The battery housing can comprise a second electrical conductor at a second end portion of the housing body, the second electrical conductor configured to electrically connect to a second battery cell terminal of the cell to define a first electrical pathway between the first electrical conductor and the second electrical conductor. The battery housing can include a bypass conductor to define a second electrical pathway between the switch and the second electrical conductor.

Abstract: A battery system is disclosed. The system may include a frame surrounding a battery active region and defining a vent carried by the frame and mounted between the battery active region and coolant passage. The vent may be configured to vent gas from the battery active region to the coolant passage responsive to a pressure or temperature of the gas exceeding a predetermined threshold, and to isolate the battery active region from the coolant passage otherwise.

Abstract: A housing includes a main body, a mounting structure assembled to the main body, and a cover. The mounting structure includes a receiving part defining a receiving space for receiving a battery, a groove communicating with the receiving space, a slot communicating with the groove, and a driving member rotatably mounted in the receiving part. The driving member includes an extending arm and a pressing portion. The extending arm faces the groove. The pressing portion passes through the slot to expose out of the receiving part. The cover is detachably attached to the main body to seal the receiving space. When the battery is received in the receiving portion, the extending arm supports the battery, when the pressing portion is pressed, the extending arm is driven to rotate with respect to the receiving part so as to make the battery lift from the receiving space.

Abstract: Battery pack includes: a plurality of chargeable/dischargeable cylindrical cells; battery holder in which the plurality of cylindrical cells are disposed; and thermally conductive resin that closely adheres to cylindrical cells, which are stored in battery holder, in a thermally coupled state above battery holder. Battery holder includes: bottom plate including a plurality of holding grooves in which cylindrical cells are disposed; and partition walls that are disposed between holding grooves and between adjacent cylindrical cells. Partition walls are lower than the diameter of cylindrical cells disposed in holding grooves, thermally conductive resin is disposed between adjacent cylindrical cells above partition walls, and thermally conductive resin interconnects adjacent cylindrical cells.

Abstract: A battery module having secondary batteries or unit modules, each having two or more secondary batteries, stacked vertically, wherein the battery module includes a base plate on which the secondary batteries or the unit modules are stacked, a pair of end plates disposed in contact with outer sides of the secondary batteries or the unit modules in which the bottom of each of the end plates is fixed to the base plate, and supporting bars connected between opposite sides of the end plates. The base plate is provided at opposite sides thereof with a pair of upward protrusions extending in a longitudinal direction to prevent deformation due to vertical vibration and to disperse pressure. Opposite sides of the bottom of each of the unit modules are disposed at the top of the upward protrusions.

Abstract: An electrode assembly includes a cell stack part having (a) a structure in which one kind of radical unit having a same number of electrodes and separators alternately disposed and integrally combined is repeatedly disposed, or (b) a structure in which at least two kinds of radical units having a same number of electrodes and separators alternately disposed and integrally combined are disposed in a predetermined order, and a fixing part extending from a top surface along a side to a bottom surface thereof for fixing the cell stack part. The one kind of radical unit has a four-layered structure in which first electrode, first separator, second electrode and second separator are sequentially stacked or a repeating structure in which the four-layered structure is repeatedly stacked, and each of the at least two kinds of radical units are stacked by ones to form the four-layered structure or the repeating structure.

Abstract: Insulators and polymer-coated insulators are provided. The insulators can include thermally-insulating nanoparticles and a binder configured to volatilize at a volatilization temperature. Insulators can also include an inorganic thermally-insulating material forming a porous structure. The porous structure can be configured to reduce the mean free path of gases in the insulator as compared to gases outside the porous structure. Polymer-coated insulators including an inorganic thermally-insulating material and a polymer coating disposed on the surface of the inorganic thermally-insulating material are also provided. Insulators can also include thermally-insulating nanoparticles and an opacifier. The opacifier can include a carbonaceous material coated with a refractory material that inhibits oxidation of the carbonaceous material at a carbon oxidation temperature. The insulators or polymer-coated insulators can be disposed between battery cells or battery cell blocks in an apparatus.

Abstract: A luggage system employing a telescopically-extendable handle and rechargeable battery power supplying assembly. The assembly includes a pair of spaced-apart stationary guide tubes for supporting a pair of telescopically-extendable rods joined to a handle structure. A base housing component is mounted in an aperture formed in the rear housing portion, and has a top surface. A battery module casing is mounted to and beneath the base housing component, and disposed substantially in the same plane as and between the pair of spaced-apart guide tubes. A rechargeable DC battery power module is contained in the battery module casing, and provides a DC battery recharging port and a set of DC power supplying ports. A semi-automatic battery power module ejection mechanism is mounted within a battery module casing mounted beneath the telescopically-extendible handle and battery power supplying assembly.

Abstract: Provided is a battery pack, which can provide a space for mounting an external element or an external device by forming a stepped portion in a protection circuit module (PCM). The battery pack includes a bare cell having a positive lead tab and a negative lead tab, a protection circuit module (PCM) electrically connected to the positive lead tab and the negative lead tab and having a stepped portion recessed from one side to the other side and having a smaller height than a peripheral portion, and a first insulating member having a groove formed to correspond to the stepped portion and surround at least a portion of the bare cell and the PCM.

Abstract: The present disclosure discloses a battery module having high safety and energy density while having stably cooling efficiency. The battery module of the present disclosure includes: a plurality of pouch-type secondary batteries standing in a vertical direction and stacked in a horizontal direction; a module case configured to accommodate the plurality of secondary batteries in an inner space thereof; a lower filling liquid filled in a lower region of the inner space of the module case and making contact with at least lower portions of the plurality of secondary batteries; and an upper filling liquid having a specific gravity less than a specific gravity of the lower filling liquid and filled in the inner space of the module case above the lower filling liquid.

Abstract: A battery compartment for an electronically driven dispensing unit includes an electronic unit having a fixed first structure and a battery holding unit having a fixed second structure adapted to receive and contain at least two cylindrical batteries side by side. The first structure includes a first electrical connection and a second electrical connection positioned opposite each other. The second structure is rotatably connected to the first structure via a joint allowing rotation between a first open position in which the batteries are loaded or unloaded in the battery holding unit and a closed position in which loaded batteries are connected to the first and second electrical connections via spring action and movement of the batteries in the loading direction.

Abstract: Battery systems according to embodiments of the present technology may include a battery cell having an electrode tab extending from an edge of the battery cell. The systems may also include a module electrically coupled with the battery cell. The module may be characterized by a first surface, a height, and a second surface opposite the first surface. A conductive tab coupled along the first surface of the module may extend from a first end parallel to a plane of the first surface. The conductive tab may be characterized by a curvature proximate a midpoint of the conductive tab. A distal region of the conductive tab may return back across the first surface of the module substantially parallel to the first surface. A distal portion of the electrode tab may be fixedly coupled with the distal region of the conductive tab.

Abstract: Applications for use with a rechargeable power unit. In one embodiment, the rechargeable power unit is configured to be releasably connected to one or more interchangeable attachments having an electric functionality. In one embodiment, an electric device is configured having a compartment and connection portion configured to receive and use the rechargeable power unit as a power source. In some embodiments, the rechargeable power unit can be obtained or exchanged at a battery exchange machine.

Abstract: Battery contact with surface texturing. Exemplary battery contacts are located within a battery pack. The battery pack is operable to provide power to a device through a device contact of the device. The battery pack includes a battery pack housing, at least one battery cell located within the battery pack housing, and battery contacts including a positive terminal and a negative terminal. The battery contacts are configured to engage the device contact of the device and allow electric current to transfer from the battery pack to the device. The battery contacts define a surface having a surface texture. The surface texture includes raised portions for contacting the device contact to allow electric current to transfer from the battery pack to the device. The surface texture also includes recessed regions spaced away from the surface and for providing a space between the battery contacts and the device contact.

Abstract: A vehicle body structure includes a load transmission member, a first engagement portion, and a second engagement portion. The load transmission member is disposed at a position overlapping with the power unit in a vehicle front view. The first engagement portion is provided between the load transmission member and the power unit. The second engagement portion is provided between the suspension member and the power unit.

Abstract: The invention relates to a battery fixing bracket and a battery pack comprising the same. A substrate of the battery fixing bracket has a rectangular shape and battery receiving spaces are defined in the substrate, the battery receiving spaces are uniformly arranged in a form of matrix in the substrate, and a through hole slightly smaller than battery end face is formed at the bottom of each battery receiving space; snap strips and snap grooves adjacent to four corners are integrally formed at sides of the battery fixing bracket, the snap strips and the snap grooves have mating shapes, and are alternately arranged in a circumferential direction of the battery fixing bracket; and a connecting hole is disposed in the middle portion of the battery fixing bracket in a perpendicularly penetrating manner.

Abstract: A holder and a mobile terminal including the holder are disclosed. The holder is located in the mobile terminal, the holder includes a heat conduction area and a heat insulation area, the heat insulation area is close to an edge of the holder, the heat insulation area is adjacent to the heat conduction area, and a heat emitting element in the mobile terminal is proximate to the heat conduction area. The heat insulation area is provided on the holder, and the heat insulation area is close to the edge of the holder and is adjacent to the heat conduction area, so that, in a process of transferring heat in the heat conduction area to the edge of the holder, the heat is impeded by the heat insulation area, thereby reducing heat at the edge of the holder.

Abstract: A battery tray for a vehicle includes two tray components or pieces that attach or mate together, such as with one tray component over or within the other tray component, to form sealed and separate battery containment areas. The lower tray component that has a panel portion and a pair of elongated reinforcement members integrally protruding upward from opposing edges of the panel portion. Also, the upper tray component has a panel portion and a cross members that integrally extend across its panel portion. The upper tray component is disposed at an upper surface of the panel portion of the lower tray component with the cross members extending between the elongated reinforcement members and defining a battery containment area between each of the cross members.

Abstract: The disclosed device is a hand-held probe thermometer which operates to display temperatures sensed by a temperature sensing probe, and a protective probe cover featuring one or more openings to allow for accurate airflow temperature measurements without removing the protective probe cover. The probe cover is also configured to function as a extendable handle for the duct thermometer to allow for an extended reach when taking measurements.

Abstract: This disclosure details electrified vehicles that are equipped with pass through assemblies for structurally reinforcing and sealing battery packs. An exemplary pass through assembly includes clean-side component and a dirty-side component. The clean-side component is positioned primarily inside the battery pack, and the dirty-side component engages the clean-side component and extends to a location outside of the battery pack for interfacing with a component of the vehicle underbody. A seal of the pass through assembly is positioned between the clean-side component and the dirty-side component and is configured to block the ingress of water, dirt, and other potential contaminants.

Abstract: A micro facial massager includes a housing, a circuit board, a driving motor, an eccentric wheel arranged on an output shaft of the driving motor, a massage piece, batteries received by a battery box which is positioned in a placed groove. A through hole is defined in a bottom of the placed groove. The battery box is dismountable and is insertable into the housing. The micro facial massager further includes two metal connectors, where the two metal connectors are corresponding fixed in the housing and are connected with the circuit board. When the battery box is inserted into the housing, the two metal connectors press an anode and a cathode of the battery, respectively. Thus, it is convenient to only open the battery box to replace the batteries.

Abstract: A battery pack includes a battery cell, a thermal interface material adjacent the battery cell and a heater element integrated with the thermal interface material.

Abstract: The present disclosure relates to a battery pack having improved assemblability, processability, and durability, and configured to stably maintain a stack of cartridges. According to an aspect of the present disclosure, the battery pack includes: vertically arranged secondary cells each including an electrode assembly, an electrolyte, and a pouch-type case; vertically stacked cartridges accommodating the secondary cells in inner spaces thereof and including coupling holes; a lower end plate including a plate-shaped metallic material and placed on a lower portion of a stack of the secondary cells and the cartridges; a first fastening member fixed to the lower end plate; and a second fastening member having an elongated shape so as to stand on the lower end plate in a direction perpendicular to the lower end plate, a lower end portion of the second fastening member coupled to the first fastening member, the second fastening member being inserted through coupling holes of the cartridges.