Abstract: A secondary battery having a three-dimensional (“3D”) structure with a curvature and a method of manufacturing the same are provided. The secondary battery includes a 3D electrode structure, and a first collector layer and a second collector layer, which are disposed on the 3D electrode structure. The 3D electrode structure is curved in a thickness direction thereof to have a curvature, and the first collector layer and the second collector layer have a curvature corresponding to the curvature of the 3D electrode structure.

Abstract: Disclosed herein is a plate-shaped battery cell including an electrode assembly, which includes a positive electrode, a negative electrode, and a separator, and a cell case, in which the electrode assembly is mounted, outer edges of the cell case being sealed by thermal bonding, wherein the electrode assembly is configured such that each electrode plate having the same polarity is partitioned into at least two electrode parts having different planar shapes and sizes, the electrode assembly is provided at a region thereof at which outer edges of the electrode parts intersect each other with at least one outside corner, at which the outer edges intersect each other at an angle of 30 to 150 degrees, and an outside recess is formed in a region of each of the electrode plates and the separator corresponding to the outer corner such that the outside recess is formed so as to be recessed inward.

Abstract: A battery packaging material includes a laminate that includes at least a base material layer, a metal layer, an insulating layer, and a sealant layer laminated in this order. The insulating layer is formed of a resin composition containing a modified polyolefin resin modified with an unsaturated carboxylic acid or acid anhydride thereof and has a hardness, when measured by using a nanoindenter and pressing an indenter 5 ?m into the insulating layer from a cross-section of the laminate in the laminating direction thereof, that ranges from 10 MPa to 300 MPa. In the sealant layer, an elastic modulus, when measured by using a nanoindenter and pressing an indenter 5 ?m into the sealant layer from a cross-section of the laminate in the laminating direction thereof, ranges from 100 MPa to 1000 MPa.

Abstract: Provided is a battery pack including a pack case configured to form an exterior; a cell assembly accommodated in the pack case, and including a plurality of battery cells respectively including electrode leads; a pack cover configured to cover the pack case so as to package the cell assembly; and a lead connecting substrate provided between the cell assembly and the pack cover, configured to connect the electrode leads of the plurality of battery cells to one another, and including insert-molded terminals penetrating through the pack cover to be connected to an external power supply.

Abstract: A secondary battery with high capacity per unit volume can be provided. A flexible secondary battery with a novel structure can be provided. A secondary battery that can be bent repeatedly can be provided. A highly reliable secondary battery can be provided. A long-life secondary battery can be provided. A secondary battery comprises an inner structure and an exterior body that surrounds the inner structure. The inner structure comprises a positive electrode and a negative electrode. The exterior body comprises a first exterior film and a second exterior film. A region comprising reduced graphene oxide lies between the first exterior film and the second exterior film. The graphene oxide preferably comprises a region where the concentration of oxygen is higher than or equal to 2 atomic percent and lower than or equal to 20 atomic percent.

Abstract: A fuel cell for use in downhole applications stores steam created by the chemical reaction in a desiccant like Zeolite. The fuel cell also uses ambient hydrostatic pressure to increase cell voltage and power-density.

Abstract: A battery pack includes a can having a curvature and an opening at a side thereof; an electrode assembly accommodated in the can; a cap assembly including a cap plate sealing the opening of the can and an electrode pin in a center of the cap plate; and an insulating case between the electrode assembly and the cap assembly, the insulating case including a first insulating unit and a second insulating unit that are separated from each other.

Abstract: A battery module has a lower housing and an upper housing. The lower housing has a plurality of generally vertical sidewalls defining a space for receiving a plurality of battery cells and a generally horizontal bottom wall. The plurality of sidewalls include a first sidewall. The lower housing further has a cooling plate integrally formed with the lower housing. The cooling plate has a support wall extending generally parallel to the bottom wall for supporting the plurality of battery cells, a plurality of generally vertical channel walls including a first channel wall, and a cooling channel for receiving a coolant fluid therein. At least a portion of the cooling channel is defined at sides thereof by the first sidewall and the first channel wall. The upper housing covers a top opening of the lower housing to form an enclosure for the plurality of battery cells.

Abstract: The present invention relates to a manufacturing method of a battery pack including plate-shaped battery cells arranged on a plane so that electrode terminals thereof face each other, including: (a) a process of electrically connecting electrode terminals of battery cells to an electrode terminal connecting portion of a protection circuit board (PCB); (b) a process of mounting the battery cells connected to the PCB in a mold provided with two or more injection holes for a thermoplastic resin; (c) a process of injecting a thermoplastic resin through the injection holes to form a molding frame made of thermoplastic resin on an outer periphery of the PCB and the battery cells; and (d) a process of solidifying the molding frame.

Abstract: A secondary battery suppresses generation of wrinkle at the outer peripheral edge portion of a negative electrode plate due to expansion of a negative electrode active material layer with use. The secondary battery includes a positive electrode plate with a positive electrode active material layer disposed on a first current collector, and a negative electrode plate with a negative electrode active material layer having an area larger than an area of the positive electrode active material layer disposed on a second current collector. The negative electrode plate includes a facing portion facing the positive electrode active material layer and a non-facing portion. The negative electrode plate and a separator are bonded through a bonding layer. The bonding strength of a second bonding portion that bonds the non-facing portion to the separator is larger than the bonding strength of a first bonding portion that bonds the facing portion to the separator.

Abstract: Disclosed herein are a short circuit structure for mechanically cutting an electrode tab and/or an electrode lead of a pouch-shaped battery cell in order to secure the safety of the pouch-shaped battery cell when the pouch-shaped battery cell swells due to gas generated in the pouch-shaped battery cell while the pouch-shaped battery cell is in an abnormal state or when the pouch-shaped battery cell is overcharged, and a pouch-shaped secondary battery including the same. Current is prevented from flowing in the pouch-shaped secondary battery when the pouch-shaped secondary battery is overcharged or when the pouch-shaped secondary battery is in an abnormal state. In addition, a reduction in the energy density of the pouch-shaped secondary battery is prevented when a voluminous device is further provided in the pouch-shaped secondary battery.

Abstract: The present invention relates to a packaging material for a power storage device including at least a substrate layer, an adhesive layer, a metal foil layer, an anti-corrosion treatment layer, an adhesive resin layer and a thermal bonding resin layer laminated in this order, wherein a thickness of the adhesive layer is in a range of 0.3 to 3 ?m, a 10-point average roughness Rzjis (in accordance with JIS B0601) of a surface of the metal foil layer which faces the substrate layer is in a range of 0.3 to 3 ?m, and the thickness of the adhesive layer is not less than the 10-point average roughness Rzjis and not more than 3 ?m, and a peel strength between the substrate layer and the metal foil layer (in accordance with JIS K6854-3) is in a range of 5 to 12 N/15 mm.

Abstract: An electrochemical cell includes an electrode body which includes a positive electrode and a negative electrode and an outer package which is formed by overlapping a first member and a second member. The outer package includes: a housing portion which houses the electrode body; and a sealing portion which is formed along an outer circumference of the housing portion, by fusing and bending the first member and the second member, at a portion corresponding to the outer circumference of the housing portion.

Abstract: The invention relates to a battery module housing which forms a first housing segment (21) and a second housing segment (22) which form accommodation spaces (3, 31, 32) that are separated from one another, each housing segment being used to accommodate at least one battery cell (13), wherein the battery module housing (1) is closable using a cover element (5) which forms a first cover segment (61) and a second cover segment (62). The first housing segment (21) is closable using the first cover segment (61) and the second housing segment (22) is closable using the second cover segment (62), wherein the cover element (5) has a dividing line (7) which is formed in such a way that the first cover segment (61) and the second cover segment (62) can be separated from one another along the dividing line (7).

Abstract: Provided are a battery module, a method of manufacturing the same, and a resin composition applied to the method of manufacturing the same. A battery module manufactured with a simple process and low cost but having excellent output for the size thereof, a method of manufacturing the same, and a resin composition applied to the method of manufacturing the same are provided in the present invention.

Abstract: An aluminum plastic film packaging material for lithium batteries to prolong service life, at least comprising an inner layer and an aluminum foil layer, is performed an anti-corrosion treatment between the inner layer and the aluminum foil layer by one of the following ways: 1) a chromium-containing anti-corrosion layer is formed from an aqueous modified resin containing trivalent chromium; and 2) an adhesive layer with non-chromium material is formed from an aqueous modified resin, an epoxy curing agent, a silane coupling agent and a nano-sized metal oxide particle.

Abstract: Disclosed herein is a battery pack including a battery cell having a curved surface and a pack housing having a curved surface, the pack housing having a battery cell receiving space corresponding to the curved surface of the battery cell to prevent occurrence of a spring back phenomenon of the battery cell and to prevent change in curvature of the battery cell due to external impact.

Abstract: An energy storage device includes: an external terminal having any one of positive and negative polarities and including a protrusion and a first terminal; a case having a polarity opposite to the external terminal and including an extension; a substrate disposed to surround an outer circumference of the protrusion of the external terminal through a hole formed at a center thereof; and a connection member located at an upper surface of the substrate and coupled to the first terminal of the external terminal, wherein the first terminal and the substrate are connected by means of the connection member, and the extension is connected to the substrate. Since positive and negative electrodes of the energy storage device are electrically connected to a substrate having a cell balancing function without a harness or any other member, it is possible to improve the economic feasibility and productivity of the energy storage device module.

Abstract: The invention relates to a housing comprising a battery compartment (102) that can be closed by a pivotable cover (103). A torsion-resistant strip (117) connects the cover (103) to the housing. When the battery (127) has been inserted, the strip (117) lies underneath the battery (127). The cover (103) can be detached from the housing, but is captively connected to the housing by means of the strip (117). The cover (103) forms a handle, by means of which batteries (127) can be removed simply from the battery compartment (102) in conjunction with the strip (117).

Abstract: The secondary battery comprises: a battery element 20 having a positive electrode 30 wherein positive active material 31 are applied on both surfaces of a positive current collector 32, a negative electrode 40 wherein negative active material 41 are applied on both surfaces of a negative current collector 42, and a separator; a packaging film 10, made of a film that includes a heat-seal resin layer 13, for accommodating the battery element; wherein a melting point or a decomposition temperature of the separator is higher than a melting point of the heat-seal resin layer by 50° C. or more; and wherein, at least a part of the active material layer 31, 41 of the positive electrode or the negative electrode and the heat-seal resin layer are heat-sealed to each other at at least one surface of the upper surface and the lower surface of the battery element.

Abstract: A package structure of a soft package lithium battery is provided. Two joining sheets that are correspondingly joined are provided at positions at which peripheries of covering films are press-fit on each tab. Each of the joining sheets has a first press-fit area and a second press-fit area. Joining surfaces of the first press-fit areas of the two joining sheets are correspondingly joined to each other and fixedly sandwich the tab therebetween. The second press-fit area is folded downward away from the tab to the first press-fit area, and the second press-fit areas are press-fit and fixed to the covering films. The concave surface formed by folding between the first press-fit area and the second press-fit area of each of the joining sheets alleviates the problem that hot gases generated during battery discharging exerts an upward force to generate a gap at the press-fit position and lead to electrolyte leakage.

Abstract: The present application relates to the technical field of batteries and, particularly, relates to an end plate of a battery module and a battery module. The end plate of a battery module includes a main body and an energy absorbing body, the energy absorbing body includes an acting portion and a connecting portion, the acting portion protrudes in a direction from the main body toward a battery, and the acting portion is connected with the main body through the connecting portion. After the battery module is assembled, if the battery of the battery module expands and applies an expansion force to the end plate, then the energy absorbing body will deform elastically, so as to absorb the expansion force of the battery. Therefore, the end plate can prevent the housing of the battery module from failure, so as to improve structural strength of the battery module.

Abstract: A power storage device packaging material has a structure in which at least a substrate layer, a first adhesive layer, a metal foil layer having an anticorrosion treatment layer on either side or both sides thereof, and a sealant layer are laminated in this order. In the packaging material, the sealant layer is formed of a resin composition containing polyolefin, and the sealant layer has at least one crystallization temperature peak in a temperature range of about 100° C. to about 120° C.

Abstract: Provided is a nonaqueous electrolyte secondary battery in which a flat wound electrode body, a nonaqueous electrolytic solution, and an insulating film are accommodated in a quadrilateral battery case. The insulating film is formed into a bag shape corresponding to a shape of the electrode body and is arranged between an inner wall of the battery case and the electrode body. An entire surface of a bottom-side R portion of two R portions of the electrode body, which faces a bottom surface of the battery case, and an inside of the bag-shaped insulating film, which faces the bottom-side R portion of the electrode body, are joined to each other.

Abstract: An aluminum plastic film packaging material for lithium batteries to prolong service life, at least comprising an inner layer and an aluminum foil layer, is performed an anti-corrosion treatment between the inner layer and the aluminum foil layer by one of the following ways: 1) a chromium-containing anti-corrosion layer is formed from an aqueous modified resin containing trivalent chromium; and 2) an adhesive layer with non-chromium material is formed from an aqueous modified resin, an epoxy curing agent, a silane coupling agent and a nano-sized metal oxide particle.

Abstract: A packaging material for batteries, which has high puncture strength, while having excellent moldability and electrolyte solution resistance. A packaging material for batteries, which is formed of a laminate that sequentially includes at least a base layer, a stainless steel foil and a thermally fusible resin layer in this order, and wherein an acid-resistant coating film layer is formed on at least the thermally fusible resin layer-side surface of the stainless steel foil.

Abstract: An electro-acoustic transducer including a housing having an interior volume with first and second interior volume portions and a sound aperture that extends to the first interior volume, a diaphragm located between the first and second interior volumes, and an environmental sensor associated with the housing and having an inlet in fluid communication with the first interior volume.

Abstract: Disclosed is a battery mounted in an electronic device and having a notch structure patterned on an uncoated part, thereby reinforcing the bond between the partitioning films of the battery and providing a structure robust to external stress and enhanced for stabilized battery performance.

Abstract: In an embodiment, an expansion component (e.g., expanding foam element, inflatable pad, a pneumatic or hydraulic mechanism, etc.) is arranged inside of a battery module compartment (e.g., on a bottom interior surface of the battery module compartment). A battery module is inserted into the battery module component and is fixated, or secured, within the battery module compartment at least in part based upon the expanding component which starts to expand or continues to expand after the insertion. In a further embodiment, the battery module may be removed from the battery module compartment after a contraction function (e.g., collapse of the foam element, deflation of the inflatable pad, etc.) of the expansion component is initiated.

Abstract: An electrolyte sheet including an electrolyte layer that includes electrolyte particles and a binder, and a base material stacked on the electrolyte layer, wherein the electrolyte particles have an ionic conductivity of 1.0×10?5 S/cm or more; the ratio of the electrolyte particles relative to the total weight of the electrolyte particles and the binder is 50 wt % or more and 99.5 wt % or less; and, after transferring the electrolyte layer in a transfer test, the electrolyte particles and the binder do not remain on the base material, and the electrolyte layer is transferred to an object without peeling.

Abstract: A kneader has a rotational conveyance member configured to knead the kneading material and convey the kneading material from an inlet toward an outlet by a rotational motion around an axis. The rotational conveyance member has a kneading zone configured to knead the kneading material, a first conveyance zone placed on an upstream side relative to the kneading zone and configured to convey the kneading material, and a second conveyance zone placed on a downstream side relative to the kneading zone and configured to convey the kneading material, and a conveyance force of the second conveyance zone is smaller than a conveyance force of the first conveyance zone in a case where the same conveyance object is conveyed.

Abstract: A secondary battery includes an electrode assembly, a can housing the electrode assembly, the can having a long axis and a short axis, and a cap plate that seals an opening of the can. The can includes a first side surface and a second side surface that face each other so as to correspond to the short axis of the can, the first side surface and the second side surface having a first thickness, a third side surface and a fourth side surface that face each other so as to correspond to the long axis of the can, the third side surface and the fourth side surface having a second thickness, the second thickness being greater than the first thickness, and a bottom surface that is located opposite the opening of the can and contacts the first through fourth side surfaces, the bottom surface having a third thickness.

Abstract: A battery including a positive electrode layer and a negative electrode layer is provided. The positive electrode layer includes a positive electrode current collector, a positive electrode active material layer, and a positive electrode-side solid electrolyte layer; the positive electrode active material layer is arranged in contact with the positive electrode current collector in a region smaller than that thereof; the positive electrode-side solid electrolyte layer is arranged in contact with the positive electrode current collector and the positive electrode active material layer in the same region as that of the positive electrode current collector; the negative electrode layer has the structure similar to that of the positive electrode layer.

Abstract: The present invention provides a secondary battery packaging material including at least a metal foil layer, a second base material layer, and a heat-sealing resin layer laminated in this order on a surface of a first base material layer. The second base material layer is laminated on the metal foil layer directly or via an anti-corrosion treatment layer. The first base material layer is formed of a resin composite containing a thermosetting resin or a thermoplastic resin. The second base material layer is formed of a resin composite containing a thermosetting resin.

Abstract: Apparatus and techniques are described herein for providing a battery plate assembly including a silicon current collector. The silicon current collector can include apertures. A lead layer or lead alloy layer can be formed on the silicon current collector. A monopolar battery assembly can be provided, such as including monopolar battery plate assemblies comprising silicon current collectors. The silicon can include a conductive metallurgical grade silicon, such as cast and cut to provide individual current collector substrates.

Abstract: A cell packaging material in which the substrate layer surface has excellent ink printing characteristics. Cell packaging material including a layered article provided with at least a substrate layer, a metal layer, and a heast-fusible layer in the stated order, the substrate layer being formed from a polyamide resin containing an ethylene-bis-stearic acid amide and an ethylene-bis-oleic acid amide.

Abstract: A method for the at least partial production of an electrical energy storage cell includes providing the electrode/separator arrangement, providing a plastics foil of self-adhesive form, and applying the self-adhesive plastics foil to at least a subregion of the arrangement surface. The energy storage cell has a storage cell housing in which there is accommodated an electrode/separator arrangement which is required for the operation of the energy storage cell. The electrode/separator arrangement has a layer structure with a sequence of cathode layers and anode layers. Opposite cathode and anode layers there are in each case separated from one another by a separator layer which is in of a porous form. The electrode/separator arrangement has an arrangement surface.

Abstract: A flat type battery includes an exterior member housing an electrolytic solution and a power generating element. The power generating element contains electrodes alternating layered between electrolyte layers, and expands with use in a layering direction of the electrodes. The exterior member forms a tightly sealed space in which the power generating element is housed, and in which an extra space is formed between the exterior member and a side surface extending along the layering direction of the power generating element. The exterior member includes a volume adjustment portion allowing for an increase in the volume of the extra space by expanding in response to a pressure rise inside the tightly sealed space while the exterior member is being pressed against the surfaces intersecting the layering direction of the power generating element due to a pressure difference between the exterior and the interior.

Abstract: Disclosed herein is a pouch-shaped secondary battery including an electrode assembly in which a positive electrode and a negative electrode are stacked with a separator interposed, an electrode lead electrically connected to electrode tabs of the electrode assembly, a pouch-shaped battery case made of a laminate sheet including an outer coating layer, a metal layer, and an inner sealant layer, and a lead box disposed on a sealed portion of the battery case for receiving the electrode lead. In particular, the electrode lead includes a lower electrode lead, which is electrically connected to the electrode tabs, and an upper electrode lead, a portion of which is coupled to the lower electrode lead.

Abstract: Provided are a negative electrode active material and a method of preparing the same, and particularly, the present invention relates to a negative electrode active material including a core including natural graphite, and a shell surrounding the core and including a roughened amorphous carbon layer. Since the negative electrode active material according to the present invention has a roughened surface, adhesion may be improved by using a less amount of a binder due to an anchoring effect in which curved surfaces of active material particles in contact with each other are anchored. Thus, an increase in resistance due to the use of an excessive amount of the binder may be prevented while achieving high loading in a negative electrode. Also, since a specific surface area is increased due to the roughened surface, access of lithium ions becomes easy, and thus, high output of a battery may be obtained.

Abstract: A packaging material for a power storage device, including: a metal foil layer; a coating layer formed on a first surface of the metal foil layer directly or via a first anti-corrosion treatment layer; a second anti-corrosion treatment layer formed on a second surface of the metal foil layer; an adhesive layer formed on the second anti-corrosion treatment layer; and a sealant layer formed on the adhesive layer. The coating layer contains at least one material selected from a group consisting of fluorine-based resins, urethane-based resins, and polyester-based resins. There is also a strength difference between the coating layer and a laminate of the adhesive layer and the sealant layer at a 10 percent stretch conducted in a tensile test (in conformity with JIS K 7127) of less than 0.400 N/mm.

Abstract: The present application relates to the field of energy storage devices, in particular to a lithium secondary battery.

Abstract: Secondary battery 100 comprises: battery electrode assembly (electrode laminate) 4 that includes positive electrodes 1 and negative electrodes 2 that overlap each other with separator 3 interposed therebetween; and conductive adhesive tape 5 which has a multilayer structure including adhesive layer 5a and conductive layer 5b, wherein adhesive layer 5a has conductivity and adhesiveness and adheres to a surface of battery electrode assembly 4, conductive layer 5b is laminated on adhesive layer 5a, and conductive adhesive tape 5 has electric resistance of 1.0 ?/cm2 or less in a thickness direction and covers at least a part of an outer peripheral portion of battery electrode assembly 4 by being wound around said part.

Abstract: A battery packaging material has a laminate in which at least a base material layer, a metal layer and a sealant layer are laminated in this order, wherein the sealant layer has a plurality of fatty acid amide-based lubricants, and at least one of the fatty acid amide-based lubricants is a saturated fatty acid amide.

Abstract: Disclosed herein is a method of manufacturing a battery pack including a battery cell having an electrode assembly received in a battery case, made of a laminate sheet including a resin layer and a metal layer, together with an electrolytic solution.

Abstract: An electrochemical cell, preferably a secondary, rechargeable cell, including a casing comprised of a main body portion having opposed lower and upper open ends closed by respective lower and upper lids is described. The main body portion is composed of titanium Grades 5 or 23 having a relatively high electrical resistivity material while the lower and upper lids are composed of titanium Grades 1 or 2. The lids are preferably joined to the main body portion using laser welding. The combination of these differing titanium alloys provides a cell casing that effectively retards eddy current induced heating during cell recharging.

Abstract: A sealant film has a structure made of a laminated body of two or more layers. The laminated body includes a first resin layer 7 containing 50 mass % or more of a random copolymer containing propylene and a copolymer component other than propylene as copolymer components, and a second resin layer 8 formed by a mixed resin containing a first elastomer-modified olefin based resin having a melting point of 155° C. or higher and a crystal melting energy of 50 J/g or more, and a second elastomer-modified olefin based resin having a melting point is 135° C. or higher and a crystal melting energy of 30 J/g or less. With this structure, when the inner pressure of a power storage device is excessively increased, breakage (separation) occurs inside the sealant layer, causing gas-releasing, which in turn can prevent bursting of the packaging material due to the inner pressure increase.

Abstract: The present disclosure relates to a battery module having a housing and a stack of battery cells disposed in a receptacle area of the housing, where each battery cell has a top having a battery cell terminal and a bottom, where the top of the battery cells face outwardly away from the receptacle area. The battery module includes an integrated sensing and bus bar subassembly positioned against the stack of battery cells and has a carrier, a bus bar integrated onto the carrier, and a biasing member integrated onto the carrier. The bus bar electrically couples battery cells in an electrical arrangement, and the biasing member is between the top of each battery cell and the carrier, where the biasing member has a first material, more compliant than a second material of the carrier, and the biasing member biases the stack of battery cells inwardly toward the housing.

Abstract: A case system for lead batteries is provided. The case system has an essentially six sided cuboid shape with two pairs of parallel sidewalls perpendicular to each other. Each pair of sidewalls defines two opposite surfaces of the essentially cuboid shape and further defines an interior volume inside the case system. The case system includes a further pair of parallel sidewalls, each of them perpendicular to the sidewalls above and each with a surface area larger than that of any one of the surface areas of the above sidewalls. One of the sidewalls is arranged as a separate cover wall for sealing the case system. At least one division plane is further included in the case system. The division plane divides the interior volume, such as to form a plurality of compartments, each for storing an electrical cell. All division planes are perpendicular to the cover wall. Further, an electrical cell, a lead battery and a lead battery layout including the above are shown.

Abstract: In a packaging body provided with at least an inner layer composed of a thermal-adhesive polyolefin based resin and a barrier layer composed of a metal foil, in which metal terminals are sealed by the thermal-adhesive resin with unconnected ends of the metal terminals protruding outside, an adhesive sheet for sealing metal terminals of a flat electrochemical cell which is not only able to prevent a short circuit between the barrier layer and the metal terminals but high in a layer-to-layer adhesive strength and a low possibility of a reduction in battery performance to be caused due to invasion of moisture is provided. In the adhesive sheet for sealing a metal terminal part of a flat electrochemical cell according to the invention, a fibrous sheet or a porous sheet is covered by the inner layer and an acid-modified polyolefin based resin layer having adhesive properties.