WO2023243723A1 - 電池 - Google Patents

電池 Download PDF

Info

Publication number
WO2023243723A1
WO2023243723A1 PCT/JP2023/022458 JP2023022458W WO2023243723A1 WO 2023243723 A1 WO2023243723 A1 WO 2023243723A1 JP 2023022458 W JP2023022458 W JP 2023022458W WO 2023243723 A1 WO2023243723 A1 WO 2023243723A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductive plate
battery
power generation
concave container
side wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/022458
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
俊平 増田
浩司 山口
潤珠 青木
彩子 新谷
春樹 上剃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Ltd
Original Assignee
Maxell Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maxell Ltd filed Critical Maxell Ltd
Priority to JP2024528985A priority Critical patent/JP7765635B2/ja
Publication of WO2023243723A1 publication Critical patent/WO2023243723A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
    • H01M10/0562—Solid materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/153—Lids or covers characterised by their shape for button or coin cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/48—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by the material
    • H01M50/486—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present disclosure relates to batteries.
  • a power generation element is housed in an internal space formed by a concave container and a lid material covering the opening of the concave container.
  • Patent Document 1 JP 2012-69508A discloses an electrochemical cell with stable electrochemical properties.
  • An electrochemical cell has a sealed container.
  • the sealed container consists of a base member and a lid member.
  • a storage space in which an electrochemical element is stored is formed between both members.
  • An elastic member that presses the electrochemical element is disposed between the lid member and the electrochemical element.
  • Patent Document 1 discloses, as an elastic member, a plate spring bent in a V-shape in cross-sectional view or a plate spring curved toward an electrochemical element.
  • Patent Document 2 discloses a battery package and a battery module.
  • the battery module includes an insulating substrate that includes a first surface and a recess that is open on the first surface and that accommodates the battery, a frame that surrounds the recess on the first surface, and an insulating substrate that is located between the frame and the recess.
  • two electrodes a conductive sheet that is electrically connected to the second electrode and extends from the first surface to the opening of the recess, a lid that closes the frame, and a space between the lid and the conductive sheet. and a spacer in contact with the lid and the conductive sheet.
  • JP-A-2006-12792 discloses a battery case and a battery.
  • the battery case includes a base made of ceramics with a recess formed in the center of its upper surface, and a lid whose outer peripheral portion is joined to the base so as to cover the recess.
  • the battery includes a battery case and a power generation element housed within the battery case.
  • a protrusion is provided in the center of the lid body, the entire portion of which protrudes toward the recess, and a curved portion is provided between the protrusion and the outer peripheral portion.
  • JP2012-69508A International Publication No. 2022/030424 Japanese Patent Application Publication No. 2006-12792
  • the V-shaped plate spring in the electrochemical cell of Patent Document 1 does not have stable contact with the electrochemical element, and may be displaced due to vibration or the like. Furthermore, since the curved surface of a significantly curved leaf spring is in contact with the electrochemical element, there is a risk that the electrical connection will not be stable.
  • an object of the present disclosure is to provide a battery that can maintain good electrical connection.
  • the battery according to the present disclosure includes a case including a concave container having a bottom portion and a side wall portion, a lid member that covers the opening of the concave container, a first electrode layer, a second electrode layer, a first electrode layer and a second electrode layer. It has a laminate including a solid electrolyte layer disposed between two electrode layers, a power generation element housed in a case, a conductive plate disposed between the power generation element and the cover material, and a conductive plate. and an elastic insulator disposed between the lid and the lid.
  • the conductive plate has a support portion for supporting the conductive plate at a position corresponding to the upper end surface of the side wall portion of the concave container.
  • the support portion is a protrusion in which a portion of the conductive plate protrudes toward the upper end surface of the side wall portion of the concave container.
  • the elastic insulator presses the conductive plate toward the power generating element while housed in the case.
  • FIG. 1 is a sectional view showing a battery according to a first embodiment.
  • FIG. 2 is a plan view showing the battery shown in FIG. 1 (excluding the lid material, conductive plate, and elastic insulator).
  • FIG. 3 is a plan view showing a conductive plate of the battery shown in FIG. 1.
  • FIG. 4 is a sectional view showing a battery according to the second embodiment.
  • FIG. 5 is a sectional view showing a battery according to the third embodiment.
  • FIG. 6 is a cross-sectional view showing a battery according to modification example 3.
  • a battery includes a case including a recessed container having a bottom portion and a side wall portion, a lid member covering an opening of the recessed container, a first electrode layer, a second electrode layer, a first electrode layer, and a lid member that covers an opening of the recessed container.
  • a power generation element which has a laminate including a solid electrolyte layer disposed between the second electrode layers and is housed in a case, a conductive plate disposed between the power generation element and the cover material, and a conductive plate. and an elastic insulator disposed between the lid and the lid.
  • the conductive plate has a support portion for supporting the conductive plate at a position corresponding to the upper end surface of the side wall portion of the concave container.
  • the support portion is a protrusion in which a portion of the conductive plate protrudes toward the upper end surface of the side wall portion of the concave container.
  • the elastic insulator presses the conductive plate toward the power generating element while housed in the case.
  • the conductive plate presses the power generating element toward the bottom side of the concave container in this manner, the conductive plate contacts the power generating element more stably even when the volume of the power generating element changes. As a result, the battery can maintain good electrical connection without causing displacement of the conductive plate due to vibration or the like. Further, by supporting the conductive plate by the supporting portion, that is, the protruding portion, of the conductive plate, the conductive plate does not come into contact with the inner peripheral side end portion of the side wall portion of the concave container. Therefore, it is possible to prevent electrical connection from becoming impossible to maintain due to deformation of the conductive plate. Furthermore, since the conductive plate is pressed by an elastic insulator that can be compressed and deformed, variations in the thickness of the power generation element can be absorbed by changes in the amount of deformation of the elastic insulator, making it possible to achieve good electrical connections. can.
  • the conductive plate may have at least two or more support parts. Thereby, the conductive plate can be more stably supported on the upper end surface of the side wall portion, the positional shift of the conductive plate can be suppressed, and better electrical connection can be maintained.
  • the conductive plate may have a flat portion facing the power generation element.
  • the elastic insulator may be made of rubber.
  • the battery may further include a conductive sheet disposed between the conductive plate and the power generation element to reduce contact resistance.
  • a conductive sheet that is more flexible than the conductive plate, that is, easily deformable, even if the volume of the power generation element changes, even better electrical connection can be maintained.
  • a battery according to an embodiment different from the above includes a case having a recessed container having a bottom portion and a side wall portion, a lid member that covers an opening of the recessed container, a flat battery housed in the case, a flat battery and a lid. and an elastic insulator disposed between the conductive plate and the lid material.
  • the conductive plate has a support portion for supporting the conductive plate at a position corresponding to the upper end surface of the side wall portion of the concave container.
  • the support portion is a protrusion in which a portion of the conductive plate protrudes toward the upper end surface of the side wall portion of the concave container.
  • the elastic insulator presses the conductive plate toward the flat battery while housed in the case. In this way, even when the flat battery is housed in the internal space of the case, good electrical connection can be maintained.
  • the conductive plate may have a flat portion facing the flat battery.
  • the material of the concave container is not particularly limited, and various materials such as resin, glass (borosilicate glass, glass ceramics, etc.), metal, and ceramic can be used. It may also be a composite material in which ceramic or glass powder is dispersed in a resin.
  • the concave container is made of a metal material, in order to ensure insulation between the concave container and the power generation element or insulation between the concave container and the flat battery, the inner surface of the bottom of the concave container and the inner peripheral surface of the side wall should be It is desirable to cover with an insulating material such as a resin material or glass.
  • the battery 1 includes a case 10, a power generation element 20 housed in the case 10, a conductive plate 30 housed in the case 10, and an elastic insulator 40 housed in the case 10. It consists of
  • the case 10 includes a concave container 11, a lid 12, a connecting terminal 13, and a connecting terminal 14.
  • the concave container 11 is made of ceramic.
  • the concave container 11 includes a square bottom 111 and a square cylindrical side wall 112 that is formed continuously from the outer periphery of the bottom 111 and has a cylindrical space for accommodating the power generation element 20 therein. There is.
  • the side wall portion 112 is provided so as to extend substantially perpendicularly to the bottom portion 111 when viewed in longitudinal section.
  • a conductor portion 113 is formed inside the bottom portion 111 .
  • the conductor portion 113 extends between the power generation element 20 and the bottom portion 111 so as to be electrically connected to the power generation element 20 .
  • a conductor portion 114 is formed inside the side wall portion 112 .
  • a portion of the conductor portion 114 is formed to be exposed on the upper end surface of the side wall portion 112, as shown in FIGS. 1 and 2. As will be described later, the exposed surface of the conductor section 114 on the upper end surface of the side wall section 112 is positioned to correspond to the support section 32 formed on the conductive plate 30. A method for manufacturing the concave container 11 will be described later.
  • the concave container 11 is not limited to ceramic, and may be made of an insulating material such as synthetic resin. Note that the concave container 11 is not limited to a rectangular shape in plan view, but may be circular, elliptical, or polygonal.
  • the internal space for accommodating the power generation element 20 is not limited to a cylindrical shape, but may be formed in a polygonal cylinder shape such as a square cylinder shape depending on the shape of the power generation element 20.
  • the conductor portion 114 may be formed on the inner surface of the side wall portion 112 instead of inside the side wall portion 112, and may further penetrate the inside of the bottom portion 111 to be electrically connected to the connection terminal 14.
  • an insulating layer may be formed between the outer circumferential surface of the power generating element 20 and the conductor section 114, for example, on the inner surface of the conductor section 114, so that the outer circumferential surface of the power generating element 20 and the conductor section 114 do not come into contact with each other. desirable.
  • the lid material 12 is a rectangular thin metal plate that covers the opening of the concave container 11. As shown in FIGS. 1 and 2, the lid member 12 is joined to the concave container 11 by a square frame-shaped seal ring 15 disposed between the lower surface of its outer peripheral end and the upper end of the concave container 11 (seam welding). ) has been done. Thereby, the internal space of the case 10 is completely sealed.
  • the interior space of the case 10 is preferably a vacuum atmosphere or an inert gas atmosphere such as nitrogen, considering the influence on the power generation element 20. Note that the lid material 12 is not limited to a thin metal plate as long as it can cover the opening of the concave container 11.
  • the lid material 12 is not limited to a rectangular shape, but can be variously changed to a circular shape, an elliptical shape, a polygonal shape, etc. depending on the shape of the concave container 11 in a plan view. Moreover, the lid material 12 may have a shape other than a flat plate. Note that the lid material 12 may be bonded to the concave container 11 with an adhesive, and the method of joining the lid material 12 and the concave container 11 is not particularly limited.
  • connection terminal 13 is arranged on the outer surface of the bottom 111 of the concave container 11.
  • the connection terminal 13 is electrically connected to an electrode layer 21, which will be described later, via a conductor portion 113.
  • the electrode layer 21 functions as a positive electrode layer as described later. Therefore, the conductor portion 113 becomes a conduction path that connects the connection terminal 13 and the positive electrode layer, and the connection terminal 13 functions as a positive electrode terminal.
  • connection terminal 14 is arranged on the outer surface of the bottom 111 of the concave container 11 away from the connection terminal 13.
  • the connection terminal 14 is electrically connected to a support portion 32 of a conductive plate 30, which will be described later, via a conductor portion 114.
  • the conductive plate 30 is electrically connected to the electrode layer 22 functioning as a negative electrode layer. Therefore, the conductor portion 114 and the conductive plate 30 become a conduction path that connects the connection terminal 14 and the negative electrode layer, and the connection terminal 14 functions as a negative electrode terminal.
  • connection terminals 13 and the connection terminals 14 is not limited to the above, and may be arranged on the outer surface of the side wall portion 112 of the concave container 11, with the lid member 12 functioning as the conductor portion 114, and the connection terminals 14 It is also possible to form it on the outer surface of the lid material 12. However, by arranging both of these terminals on the outer surface of the bottom 111 of the concave container 11 at a constant interval, it is possible to mount them on the surface of the circuit board.
  • a method for manufacturing the concave container 11 will be explained.
  • a printed pattern that will become the conductor portions 113 and 114 is formed by printing and applying a metal paste to a ceramic green sheet.
  • a plurality of green sheets on which these printed patterns are formed are laminated to form a structure having the conductor portion 113 and the conductor portion 114 inside, and the above-mentioned support portion 115 on the inner peripheral surface of the side wall portion 112.
  • a concave container 11 can be produced.
  • the connection terminals 13 and 14 can also be formed by a printed pattern of this metal paste.
  • the power generation element 20 includes an electrode layer (positive electrode layer) 21, an electrode layer (negative electrode layer) 22, and a solid electrolyte layer 23. Solid electrolyte layer 23 is arranged between electrode layer 21 and electrode layer 22.
  • the power generation element 20 is formed into a cylindrical shape.
  • the power generation element 20 includes an electrode layer 21, a solid electrolyte layer 23, and an electrode layer 22 stacked in this order from the bottom 111 side (lower side in the drawing) of the concave container 11. That is, the power generation element 20 is housed in the internal space of the case 10 such that the lower surface of the electrode layer 21 and the inner surface of the bottom 111 of the concave container 11 face each other.
  • the power generation element 20 is not limited to a cylindrical shape, and can be modified into various shapes such as a rectangular parallelepiped shape and a polygonal column shape.
  • the electrode layer 21 contains lithium cobalt oxide, a sulfide-based solid electrolyte, and graphene as a conductive agent in a mass ratio of 65:30:5 as a positive electrode active material used in a lithium ion secondary battery.
  • a positive electrode pellet is obtained by placing the prepared positive electrode mixture into a mold with a diameter of 7.45 mm and molding it into a cylindrical shape.
  • the positive electrode active material of the electrode layer 21 is not particularly limited as long as it can function as the positive electrode layer of the power generation element 20, and examples thereof include lithium nickelate, lithium manganate, lithium nickel cobalt manganese composite oxide, It may be an olivine-type complex oxide or the like, or it may be an appropriate mixture of these.
  • the size and shape of the electrode layer 231 are not limited to a cylindrical shape, and can be variously changed depending on the size and shape of the battery 1.
  • the electrode layer 22 contains LTO (Li 4 Ti 5 O 12 , lithium titanate), a sulfide-based solid electrolyte, and graphene in a weight ratio of 50:40 as a negative electrode active material used in a lithium ion secondary battery.
  • LTO Li 4 Ti 5 O 12 , lithium titanate
  • This is a negative electrode pellet formed into a cylindrical shape from a negative electrode mixture containing 10 parts.
  • the negative electrode active material of the electrode layer 22 is not particularly limited as long as it can function as the negative electrode layer of the power generation element 20, and examples thereof include metallic lithium, lithium alloy, and carbon such as graphite and low crystal carbon. It may be a material, an oxide such as SiO, or a mixture of these as appropriate.
  • the size and shape of the electrode layer 22 are not limited to a cylindrical shape, and can be changed in various ways depending on the size and shape of the battery 1.
  • the solid electrolyte layer 23 is a sulfide-based solid electrolyte formed into a columnar shape.
  • the solid electrolyte contained in the electrode layer 21, the electrode layer 22, and the solid electrolyte layer 23 is not particularly limited, but from the viewpoint of ionic conductivity, a sulfide-based solid electrolyte, particularly an argyrodite-type sulfide-based solid electrolyte is preferable. used.
  • the surface of the positive electrode active material is preferably coated with a lithium ion conductive material such as niobium oxide in order to prevent reaction with the positive electrode active material.
  • the solid electrolyte included in the solid electrolyte layer 23, the electrode layer 21, and the electrode layer 22 may be a hydride solid electrolyte, an oxide solid electrolyte, or the like.
  • the size and shape of the solid electrolyte layer 23 are not limited to a cylindrical shape, and can be changed in various ways depending on the size and shape of the battery 1.
  • the conductive plate 30 is a metal plate having a rectangular shape in a plan view and is installed in the opening of the concave container 11 of the case 10.
  • the conductive plate 30 has a flat portion 31 and a support portion 32 for supporting the conductive plate 30 on the upper end surface of the side wall portion 112 of the concave container 11.
  • the lower surface of the flat portion 31 faces the power generation element 20 and is in contact with the upper surface of an electrode layer 22, which will be described later.
  • Two or more supporting parts 32 are provided so that the conductive plate 30 can be supported on the upper end surface of the side wall part 112. Thereby, the conductive plate 30 is more stably supported on the upper end surface of the side wall portion 112.
  • the conductive plate 30 has four support parts 32 at the four corners.
  • the support portion 32 is a protruding portion that protrudes from the flat portion 31 toward the upper end surface of the side wall portion 112 .
  • the protruding portion is continuous with the flat portion 31.
  • the support portion 32 supports the conductive plate 30 such that the flat portion 31 is positioned between the upper end surface of the side wall portion 112 and the lid member 12. In other words, the flat portion 31 is suspended from the upper end surface of the side wall portion 112 by being supported by the support portion 32 formed of a protruding portion.
  • the flat portion 31 is pressed toward the power generation element 20 by the elastic insulator 40 described later, it becomes easier to bend toward the power generation element 20.
  • At least a portion of the support portion 32 is in contact with the conductor portion 114 exposed on the upper end surface of the side wall portion 112.
  • the conductive plate 30 functions as a current collector and forms part of a conduction path that electrically connects the electrode layer 22 and the connection terminal 14.
  • the entire conductive plate 30 is flat, that is, if the conductive plate 30 has a flat plate shape, when the center portion of the conductive plate 30 is pressed toward the power generation element 20, the side wall portion 112 The inner end of the upper end surface serves as a fulcrum, and the outer edge side of the conductive plate 30 tries to rise from the upper end surface of the side wall portion 112. Therefore, the problem that it becomes difficult to maintain a good conductive connection between the conductive plate 30 and the conductor portion 114 tends to occur.
  • the conductive plate 30 does not come into contact with the inner end of the upper end surface of the side wall portion 112 even if the center portion of the conductive plate 30 is pressed toward the power generation element 20. Since a good conductive connection between the support part 32 and the conductor part 114 is maintained, the electrical connection can also be stabilized.
  • the conductive plate 30 covers the opening of the concave container 11 .
  • the area of the conductive plate 30 in plan view is larger than the opening area of the concave container 11.
  • the number or position of the supporting parts 32 and the number or position of the exposed surfaces of the conductor part 114 are not limited to these, and the number or position of the supporting parts 32 and the number or positions of the exposed surfaces of the conductor part 114 are not limited to these. It is sufficient if it can be electrically connected. Furthermore, as shown in FIGS. 2 and 3, among the supporting parts 32 provided at the four corners of the conductive plate 30, two supporting parts 32 are in contact with the conductor part 114, and the other two supporting parts 32 are in contact with the conductor part 114. Do not touch 114. In this way, some of the plurality of support parts 32 may be brought into contact with the conductor part 114. However, by bringing two or more supporting parts 32 into contact with the conductor part 114, the electrical connection becomes more stable.
  • the elastic insulator 40 is made of an insulating material.
  • the elastic insulator 40 is made of rubber.
  • the insulating material is not limited to rubber and can be changed in various ways.
  • the elastic insulator 40 is a circular sheet that follows the top surface shape of the power generation element 20 in plan view.
  • the elastic insulator 40 is arranged between the flat part 31 of the conductive plate 30 and the lid member 12.
  • the elastic insulator 40 has a thickness larger than the gap between the lid member 12 and the flat part 31 of the conductive plate 30 placed on the upper end surface of the side wall part 112 via the support part 32 .
  • the conductive plate 30 is installed so that the power generation element 20 is covered by the plane part 31.
  • the elastic insulator 40 moves toward the power generation element 20. and press the conductive plate 30.
  • the end portion of the conductive plate 30 is supported by the upper end surface of the side wall portion 112, a portion of the plane portion 31 corresponding to the power generation element 20 is slightly bent toward the power generation element 20.
  • the conductive plate 30 can appropriately press the power generation element 20 toward the bottom side of the concave container 11, suppress the displacement of the conductive plate 30, and stabilize the electrical connection. Furthermore, since the flat portion 31 presses the power generation element 20 with a large area, it is possible to suppress damage to the electrode layer 22 when the power generation element 20 expands, and by widening the area for conductive connection, it is possible to improve the A good electrical connection can be maintained. Moreover, the elastic insulator 40 is made of an insulating material that can be compressed and deformed.
  • the deviation in the thickness of the power generation element 20 can be absorbed by the change in the amount of deformation of the elastic insulator 40, so that a good electrical connection can be achieved. .
  • the battery 1 of this embodiment has a conductive sheet 50 between the electrode layer 22 and the conductive plate 30.
  • the conductive sheet 50 is a conductive sheet made of expanded graphite, that is, a graphite sheet.
  • a graphite sheet is manufactured as follows. First, acid-treated graphite particles, which are natural graphite treated with an acid, are heated. Then, the acid-treated graphite expands as the acid between its layers evaporates and foams. This expanded graphite (expanded graphite) is molded into a felt shape, and further rolled using a roll mill to form a sheet body.
  • the conductive sheet 50 is manufactured by hollowing out the expanded graphite sheet into a circular shape.
  • expanded graphite is formed by vaporizing acid and foaming acid-treated graphite. Therefore, the graphite sheet is formed into a porous shape. Therefore, the graphite sheet has not only the electrical conductivity of graphite itself, but also flexibility that conventional graphite products do not have.
  • the method for producing the graphite sheet is not limited to this, and the graphite sheet may be made of a material other than expanded graphite, and the graphite sheet may be produced by any method.
  • the apparent density of the graphite sheet is preferably 0.3 g/cm 3 or more, more preferably 0.7 g/cm 3 or more. This is because if the apparent density of the graphite sheet is too low, the graphite sheet will be easily damaged. Note that the apparent density is not limited to the graphite sheet, and can also be applied to the conductive sheet 50 formed of other materials such as conductive tape.
  • the thickness of the graphite sheet is preferably 0.05 mm or more, more preferably 0.07 mm or more, preferably 0.5 mm or less, and more preferably 0.2 mm or less. If the thickness of the graphite sheet is too small, the graphite sheet will be easily damaged, and if the thickness is too large, the graphite sheet will narrow the internal space of the case 10 that accommodates the power generation element 20, reducing the volume (thickness) of the power generation element 20 that can be accommodated. This is to do so. Note that the thickness of the graphite sheet is not limited to that of the graphite sheet, and the conductive sheet 50 formed of other materials such as conductive tape is also applicable.
  • the conductive sheet 50 that is more flexible than the conductive plate, that is, easily deformable, the pressing force of the conductive plate 30 described above is more uniformly transmitted to the power generation element 20, thereby preventing damage to the power generation element 20.
  • its excellent flexibility can improve the stability of electrical connections.
  • the conductive sheet 50 may be placed between the electrode layer 21 and the bottom 111 of the concave container 11, as shown in FIG. Thereby, it is possible to further suppress damage to the power generation element 20 and stabilize the electrical connection.
  • the battery 1 of the third embodiment will be specifically described using FIG. 5.
  • the description of the same configuration as the battery 1 of the first embodiment and the second embodiment will basically be omitted, and the configuration different from the battery 1 of the first embodiment and the second embodiment. I will only explain about.
  • the battery 1 of this embodiment houses a flat battery 60 in the internal space of the case 10.
  • the flat battery 60 includes an exterior can 61, a sealed can 62, the above-described power generation element 20, and a gasket 63.
  • a flat portion 31 of the conductive plate 30 faces the flat battery 60 and is in contact with a flat portion 621 of a sealed can 62, which will be described later.
  • the outer can 61 includes a circular flat part 611 and a cylindrical side wall part 612 that is continuously formed from the outer periphery of the flat part 611.
  • the cylindrical side wall portion 612 is provided so as to extend substantially perpendicularly to the flat portion 611 when viewed in longitudinal section.
  • the outer can 61 is made of a metal material such as stainless steel.
  • the sealing can 62 includes a circular flat part 621 and a cylindrical peripheral wall part 622 that is continuously formed from the outer periphery of the flat part 621.
  • the opening of the sealed can 62 faces the opening of the outer can 61.
  • the sealing can 62 is made of a metal material such as stainless steel.
  • the outer can 61 and the sealing can 62 are caulked with a gasket 63 between the cylindrical side wall 612 of the outer can 61 and the peripheral wall 622 of the sealing can 62 after the power generation element 20 is accommodated in the internal space.
  • the outer can 61 and the sealing can 62 are configured such that the openings of the outer can 61 and the sealing can 62 face each other, and the peripheral wall portion 622 of the sealing can 62 is placed inside the cylindrical side wall portion 612 of the outer can 61. After inserting, the cylindrical side wall portion 612 and the peripheral wall portion 622 are crimped with a gasket 63 interposed therebetween. Thereby, the internal space formed by the outer can 61 and the sealing can 62 is in a sealed state.
  • the outer can 61 and the sealed can 62 are not limited to circular shapes in plan view, but can be modified into various shapes such as elliptical shapes or polygonal shapes.
  • the gasket 63 is made of a resin material such as polyamide resin, polypropylene resin, or polyphenylene sulfide resin.
  • the method for sealing the internal space formed by the outer can 61 and the sealing can 62 is not limited to caulking via the gasket 63, and may be performed by other methods.
  • the cylindrical side wall portion 612 of the outer can 61 and the peripheral wall portion 622 of the sealing can 62 may be joined with a hot melt resin, an adhesive, or the like interposed therebetween for sealing.
  • the above-described conductive sheet 50 may be placed between the flat battery 60 and the conductive plate 30. Further, the conductive sheet 50 may be arranged between the flat battery 60 and the bottom 111 of the concave container 11.
  • the flat battery 60 is not limited to an all-solid battery having a solid electrolyte layer, but may be a non-aqueous electrolyte battery or any other flat battery.
  • the electrode layer 21 functions as a positive electrode layer and the electrode layer 22 functions as a negative electrode layer, but the electrode layer 21 functions as a negative electrode layer and the electrode layer 22 functions as a positive electrode layer. You can make it work.
  • the connection terminal 13 functions as a negative terminal, and the connection terminal 14 functions as a positive terminal.
  • the battery 1 containing one power generation element 20 was constructed, but a bipolar type battery 1 may be constructed in which a plurality of power generation elements 20 are connected in series.
  • the flat battery 60 is housed in the internal space of the case 10 so that the outer can 61 and the bottom 111 of the concave container 11 face each other. They may be housed so that they are facing each other. That is, the flat battery 60 may be housed in the internal space of the case 10 with the flat battery 60 shown in FIG. 5 turned upside down. In this case, the flat portion 31 of the conductive plate 30 comes into contact with the flat portion 611 of the outer can 61.
  • the elastic insulator 40 may be made larger in the radial direction so that the elastic insulator 40 is also located between the support portion 32 of the conductive plate 30 and the lid member 12. .
  • the elastic insulator 40 directly presses the support portion 32 in the direction of the upper end surface of the side wall portion 112 of the concave container 11, it becomes easier to maintain a good conductive connection between the support portion 32 and the conductor portion 114.
  • a spring piece is supported in a cantilever manner by the flat part 31 of the conductive plate 30 and presses the power generation element 20 and the like toward the bottom 111 of the concave container 11.
  • 33 may be provided.
  • the tip of the spring piece 33 may be bent toward the flat portion 31 so that the lower surface of the bent portion comes into contact with the power generation element 20 or the like.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
PCT/JP2023/022458 2022-06-16 2023-06-16 電池 Ceased WO2023243723A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2024528985A JP7765635B2 (ja) 2022-06-16 2023-06-16 電池

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022097211 2022-06-16
JP2022-097211 2022-06-16

Publications (1)

Publication Number Publication Date
WO2023243723A1 true WO2023243723A1 (ja) 2023-12-21

Family

ID=89191436

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/022458 Ceased WO2023243723A1 (ja) 2022-06-16 2023-06-16 電池

Country Status (2)

Country Link
JP (1) JP7765635B2 (https=)
WO (1) WO2023243723A1 (https=)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025204867A1 (ja) * 2024-03-26 2025-10-02 京セラ株式会社 電池用パッケージおよび電池モジュール
EP4715921A1 (en) * 2024-09-11 2026-03-25 Hana Technology Co., Ltd. Device for pressing and sealing all-solid-state secondary battery

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5436726U (https=) * 1977-08-19 1979-03-10
JP2018081820A (ja) * 2016-11-16 2018-05-24 日産自動車株式会社 電池
US20200295406A1 (en) * 2019-03-14 2020-09-17 Medtronic, Inc. Lithium-ion battery
WO2022113989A1 (ja) * 2020-11-25 2022-06-02 マクセル株式会社 ケース付き全固体電池

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116097501A (zh) 2020-08-07 2023-05-09 京瓷株式会社 电池用封装以及电池模块

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5436726U (https=) * 1977-08-19 1979-03-10
JP2018081820A (ja) * 2016-11-16 2018-05-24 日産自動車株式会社 電池
US20200295406A1 (en) * 2019-03-14 2020-09-17 Medtronic, Inc. Lithium-ion battery
WO2022113989A1 (ja) * 2020-11-25 2022-06-02 マクセル株式会社 ケース付き全固体電池

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025204867A1 (ja) * 2024-03-26 2025-10-02 京セラ株式会社 電池用パッケージおよび電池モジュール
EP4715921A1 (en) * 2024-09-11 2026-03-25 Hana Technology Co., Ltd. Device for pressing and sealing all-solid-state secondary battery

Also Published As

Publication number Publication date
JPWO2023243723A1 (https=) 2023-12-21
JP7765635B2 (ja) 2025-11-06

Similar Documents

Publication Publication Date Title
JP5112885B2 (ja) 蓄電体用容器ならびにそれを用いた電池および電気二重層キャパシタ
EP4492559A1 (en) Electrochemical element
KR100823193B1 (ko) 이차 전지
CN114614214B (zh) 电池
WO2023243723A1 (ja) 電池
KR100932224B1 (ko) 무용접 접속방식의 이차전지
EP4568002A1 (en) Electrochemical element
WO2022113989A1 (ja) ケース付き全固体電池
JP7759503B2 (ja) 電気化学素子
JP2006049289A (ja) 電池用ケースおよび電池ならびに電気二重層キャパシタ用ケースおよび電気二重層キャパシタ
JP2993069B2 (ja) 密閉形集合電池
CN112154561B (zh) 包括具有由支撑框架支撑的边缘绝缘装置的双极电池单元的电池
US20260031506A1 (en) All-solid-state battery
JP2024144900A (ja) 電気化学素子
KR100709874B1 (ko) 각형 리튬 이차전지 및 그 제조방법
JP7670496B2 (ja) 電気化学セルの配置構造および電子機器
CN221928496U (zh) 电化学元件
JP2024102519A (ja) 電気化学素子
CN221747435U (zh) 电化学元件
WO2023037641A1 (ja) 電池及び電池の製造方法
CN118922997A (zh) 电化学元件
JP2007214391A (ja) キャパシタ
WO2025142958A1 (ja) 電気化学素子の組立方法及び組立装置
CN217062447U (zh) 电池
JP2025009520A (ja) 電気化学素子

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23824013

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2024528985

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 23824013

Country of ref document: EP

Kind code of ref document: A1