WO2017115857A1 - 蓄電素子 - Google Patents
蓄電素子 Download PDFInfo
- Publication number
- WO2017115857A1 WO2017115857A1 PCT/JP2016/089145 JP2016089145W WO2017115857A1 WO 2017115857 A1 WO2017115857 A1 WO 2017115857A1 JP 2016089145 W JP2016089145 W JP 2016089145W WO 2017115857 A1 WO2017115857 A1 WO 2017115857A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- corner
- electrode terminal
- cut
- terminal
- peripheral wall
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—Terminals, e.g. extensions of current collectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/80—Gaskets; Sealings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/78—Cases; Housings; Encapsulations; Mountings
- H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
-
- 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 of a single cell or a single battery
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- 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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
-
- 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 invention relates to an electric storage element including an electrode terminal and an insulating member for the electrode terminal.
- Patent Document 1 describes a power storage device that includes a can and a lid as a container and an external terminal as an electrode terminal provided on the lid.
- the external terminal includes a base portion constituted by a flat portion and an insertion portion provided in the base portion and penetrating the lid.
- an external insulator as an insulating member is disposed between the base portion and the lid.
- the external insulator has a cover wall, and the cover wall covers the side surface of the base portion of the external terminal disposed inside the cover wall.
- the present invention provides a power storage element that facilitates insertion of an electrode terminal into an insulating member and suppresses movement of the electrode terminal within the insulating member.
- An electricity storage device includes a container, an electrode terminal, and an insulating member provided between the electrode terminal and the wall of the container, and the electrode terminal has a corner cut at an outer periphery of the electrode terminal.
- the insulating member has a peripheral wall portion extending along an outer periphery of the electrode terminal, and the peripheral wall portion faces the corner corner portion.
- a corner portion that is a corner portion that has been cut is provided, and a protrusion is formed on the corner cutting surface of the corner cutting corner portion or the corner cutting surface of the corner cutting corner portion.
- the electricity storage device of the present invention it is possible to suppress the movement of the electrode terminal within the insulating member while facilitating the insertion of the electrode terminal into the insulating member.
- FIG. 1 is a perspective view schematically showing the external appearance of the energy storage device according to the embodiment.
- FIG. 2 is an exploded perspective view of the electricity storage device of FIG. 3 is a plan view of the lid of the electricity storage device of FIG.
- FIG. 4 is an enlarged plan view of the positive terminal and the first upper insulating member on the lid of FIG.
- FIG. 5 is an enlarged plan view of the negative terminal and the second upper insulating member on the lid of FIG.
- FIG. 6 is a perspective view of the first upper insulating member of FIG.
- FIG. 7 is a perspective view of the second upper insulating member of FIG.
- the present inventor has reached the following knowledge regarding the technology described in the “Background Art” column.
- the covering wall of the external insulator has a rectangular planar shape. If the clearance between the covering wall of the external insulator and the base portion of the external terminal is large, the base portion may be loose due to rotational movement or the like inside the covering wall. On the other hand, if the clearance between the covering wall of the external insulator and the base portion of the external terminal is small, it becomes difficult to insert the base portion inside the covering wall.
- the present inventor has found the following various types of power storage elements in order to facilitate the insertion of the electrode terminal into the insulating member and suppress the movement of the electrode terminal within the insulating member.
- An electricity storage device includes a container, an electrode terminal, and an insulating member provided between the electrode terminal and a wall portion of the container, and the electrode terminal is disposed on an outer periphery of the electrode terminal.
- the insulating member has a peripheral wall portion extending along an outer periphery of the electrode terminal, and the peripheral wall portion has the corner cutting angle.
- a corner portion that is a corner portion that is opposite to the corner portion, and a protrusion is formed on the corner cutting surface of the corner cutting corner portion or the corner cutting surface of the corner cutting corner portion.
- the protrusion can support the electrode terminal in a direction facing the outer peripheral side surface of the electrode terminal.
- the insertion of the electrode terminal into the inner side of the peripheral wall portion of the insulating member can be performed while the protrusion is in contact with the corner cut surface facing the protrusion.
- the contact with the protrusion requires a smaller force for insertion than when the outer peripheral side surface of the electrode terminal and the inner side surface of the peripheral wall portion are in direct contact with each other because the contact area is small and the frictional resistance is low. Therefore, it is possible to reduce the clearance between the protrusion and the corner cut surface facing the protrusion, and to suppress movement such as rattling of the electrode terminal in the peripheral wall portion.
- the clearance between the outer peripheral side surface of the electrode terminal and the inner side surface of the peripheral wall portion can be increased at least by the protrusion amount of the protrusion. Therefore, it is easy to insert the electrode terminal inside the peripheral wall.
- the corner corner of the peripheral wall portion of the insulating member receives a force from the electrode terminal through the protrusion, the stress acting on the corner corner is applied to the portion adjacent to the corner corner in the peripheral wall portion. scatter. For this reason, the damage of a surrounding wall part and the fall of durability are suppressed.
- the protrusion may be positioned in the outer peripheral direction of the electrode terminal so as to be shifted from a center portion of the corner cut surface of the corner cut corner portion or a center portion of the corner cut surface of the corner cut corner portion.
- rotation occurs along the outer peripheral direction of the electrode terminal, and the rotation is stopped when the protrusion comes into contact with the corner cut surface of the corner cut corner portion or the corner cut surface of the corner cut corner portion.
- the peripheral wall portion is pressed via the protrusion at a position shifted from the center portion of the corner cut surface.
- the corner cut surface of the corner cut corner portion is a flat surface or a convex curved surface extending along the outer periphery of the electrode terminal, and the corner cut surface of the corner cut corner portion is a corner cut surface of the corner cut corner portion. It may be a flat surface or a concave curved surface that extends along and faces the flat surface or convex curved surface that forms the surface.
- the two corners at locations other than the protrusions are formed by forming the corner cut surface of the corner cut corner portion of the electrode terminal and the corner cut surface of the corner cut corner portion of the insulating member in a similar shape. The contact of the cut surface can be suppressed.
- the electrode terminal has a shape including a long side and a short side that intersects the long side, and the protrusion in the flat surface is more than a center portion of the flat surface in the outer peripheral direction of the electrode terminal.
- the protrusion when the electrode terminal is biased outward in the longitudinal direction and is on the convex curved surface or the concave curved surface is more than the central portion of the convex curved surface or the concave curved surface in the outer peripheral direction of the electrode terminal.
- the electrode terminal may be positioned inward in the longitudinal direction of the electrode terminal.
- the electrode terminal when a rotation that causes the length of the electrode terminal to be directed toward the flat surface occurs, the protrusion on the flat surface is contacted at the initial stage of the rotation, and the rotation of the electrode terminal is stopped.
- the electrode terminal when the electrode terminal is rotated so that the length of the electrode terminal is directed toward the convex curved surface or the concave curved surface, the projection on the convex curved surface or the concave curved surface is contacted at the initial stage of rotation, and the rotation of the electrode terminal is stopped.
- the Therefore, it can be configured to suppress contact between the electrode terminal and the surrounding wall portion at a place other than the protrusion during rotation of the electrode terminal.
- the electrode terminal has four corner-cutting corners, and the peripheral wall portion has four corner-cutting corners, and at least one corner-cutting angle of the four corner-cutting corners.
- the corner cut surface of the portion is a flat surface extending along the outer periphery of the electrode terminal, and the corner cut surface of at least one corner cut corner portion extends along the outer periphery of the electrode terminal.
- a corner cut surface of at least one of the four corner cut corners is a flat surface extending along and opposite to the flat surface of the corner cut corner,
- the corner cutting surface of at least one corner corner may be a concave curved surface extending along and opposite to the convex curved surface of the corner cutting corner.
- the peripheral wall portion is obtained by arranging a combination of flat surfaces and a combination of a convex curved surface and a concave curved surface on the four corner cutting corners and the corner cutting surfaces of the corner cutting corners.
- the direction of the electrode terminal with respect to can be easily positioned.
- the planar shape of the outer periphery of the electrode terminal and the inner periphery of the peripheral wall portion with respect to the wall portion is a rectangular shape, and the two corner cutting corner portions including the flat surface and the two corner cutting portions including the flat surface.
- the corners are in a diagonal position relationship, and the two corner cutting corner portions including the convex curved surface and the two corner cutting corner portions including the concave curved surface are in a diagonal positional relationship, respectively, and the flat surface
- the projection on the upper side is positioned more biased toward the short side of the electrode terminal or the peripheral wall than the central portion of the flat surface in the outer peripheral direction of the electrode terminal, and on the convex curved surface or the concave curved surface
- the protrusion may be positioned to be deviated toward a longer side of the electrode terminal or the peripheral wall portion from a central portion of the convex curved surface or the concave curved surface in the outer peripheral direction of the electrode terminal.
- the protrusion may be a columnar protrusion having a convex curved surface including a curve in the outer peripheral direction of the electrode terminal and extending in a direction intersecting with the wall portion.
- the contact area can be kept low.
- the columnar protrusion supports the electrode terminal not only in the direction along the wall portion of the container but also in the direction intersecting with the wall portion.
- each figure in the attached drawings is a schematic diagram and is not necessarily illustrated strictly. Furthermore, in each figure, the same code
- expressions with “substantially” such as substantially parallel and substantially orthogonal may be used. For example, “substantially parallel” not only means completely parallel, but also means substantially parallel, that is, including a difference of, for example, several percent. The same applies to expressions involving other “abbreviations”.
- FIG. 1 is a perspective view schematically showing an external appearance of a power storage device 100 according to the embodiment.
- the power storage element 100 has a flat rectangular parallelepiped outer shape.
- the storage element 100 is a chargeable / dischargeable secondary battery.
- the electrical storage element 100 is a nonaqueous electrolyte secondary battery such as a lithium ion secondary battery.
- the storage element 100 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than the non-aqueous electrolyte secondary battery, and can store the stored electricity without being charged by the user.
- a usable primary battery or a capacitor may be used.
- the electric storage element 100 includes a flat rectangular parallelepiped container 10, an electrode body 20 accommodated in the container 10, a positive electrode terminal 30, and a negative electrode terminal 40.
- 2 is an exploded perspective view of the storage element 100 of FIG.
- the positive electrode terminal 30 and the negative electrode terminal 40 are examples of electrode terminals.
- the container 10 has a bottomed rectangular tube-shaped container body 11 and an elongated rectangular plate-shaped lid body 12 that can close the opening 11a of the container body 11.
- the container main body 11 has a flat rectangular parallelepiped outer shape, and has an elongated rectangular bottom wall 11b and four rectangular side walls 11c, 11d, 11e, and 11f that stand upright from four edges of the bottom wall 11b. And have.
- the side walls 11c and 11e are located opposite to each other, and form long side walls that are wider in the direction along the periphery of the opening 11a (hereinafter, the side walls 11c and 11e are also referred to as long side walls 11c and 11e).
- the side walls 11d and 11f are positioned to face each other and form narrower side walls that are narrower in the direction along the periphery of the opening 11a (hereinafter, the side walls 11d and 11f are also referred to as short side walls 11d and 11f).
- the opening 11a has an elongated rectangular shape similar to the bottom wall 11b.
- the positive terminal 30 and the negative terminal 40 are disposed on the outer surface 12 a of the lid body 12.
- the lid body 12 is an example of a wall portion of the container.
- the container body 11 and the lid body 12 are fixed with a joint portion such as welding in an airtight state.
- the container main body 11 and the cover body 12 can be comprised with metals which can be welded, such as stainless steel, aluminum, aluminum alloy, for example.
- an electrolyte such as an electrolytic solution (in this embodiment, a nonaqueous electrolytic solution) is sealed inside the container 10, the illustration of the electrolyte is omitted.
- the electrolyte sealed in the container 10 there is no particular limitation on the type thereof as long as it does not impair the performance of the electricity storage device 100, and various types can be selected.
- the positive electrode terminal 30 and the negative electrode terminal 40 are respectively connected to the positive electrode current collector 50 and the negative electrode current collector 60 having conductivity on the side opposite to the outer surface 12a of the lid body 12.
- the positive electrode current collector 50 and the negative electrode current collector 60 are further connected to the electrode body 20. Therefore, the electrode body 20 is provided so as to be suspended from the lid body 12 via the positive electrode current collector 50 and the negative electrode current collector 60.
- the electrode body 20 is housed in the container body 11 together with the positive electrode current collector 50 and the negative electrode current collector 60.
- the electrode body 20 may be covered with an insulating film etc.
- a buffer material such as a spacer may be provided between the electrode body 20 and the container body 11.
- the electrode body 20 is a power storage element (also referred to as a power generation element) capable of storing electricity.
- the electrode body 20 includes a long belt-like sheet-like positive electrode plate, a long belt-like sheet-like negative electrode plate, and a long belt-like sheet-like separator so as to be layered.
- the electrode body 20 is formed by winding the superimposed positive electrode plate, negative electrode plate, and separator together in a spiral manner around the winding axis A.
- the winding axis A is a virtual axis indicated by a one-dot chain line in FIG. 2, and the electrode body 20 has a substantially symmetric configuration with respect to the winding axis A.
- the positive electrode plate, the negative electrode plate, and the separator are laminated in a direction perpendicular to the winding axis A in such a manner that the separator is interposed between the positive electrode plate and the negative electrode plate.
- the electrode body 20 has a flat outer shape having an oblong shape with a flat cross section perpendicular to the winding axis A.
- the cross-sectional shape of the electrode body 20 may be other than an oval shape, and may be a circle, an ellipse, a rectangle, or another polygon.
- the positive electrode plate includes a positive electrode base material and a positive electrode active material layer.
- the positive electrode base material is a long metal foil made of metal such as aluminum or aluminum alloy, and the positive electrode active material layer is laminated on the surface of the positive electrode base material by a method such as coating.
- the negative electrode plate includes a negative electrode substrate and a negative electrode active material layer.
- the negative positive electrode substrate is a long strip-shaped metal foil made of metal such as copper or copper alloy, and the negative electrode active material layer is laminated on the surface of the negative electrode substrate by a method such as coating.
- the separator is a microporous sheet made of an electrically insulating material such as a resin.
- the positive electrode active material used for the positive electrode active material layer or the negative electrode active material layer any known material can be used as long as it is a positive electrode active material or negative electrode active material capable of occluding and releasing lithium ions.
- the electrode body 20 has two end portions 20a and 20b along the winding axis A direction.
- a positive electrode active material non-formation part 21 is formed at the end 20a, and a negative electrode active material non-formation part 22 is formed at the end 20b.
- the positive electrode active material non-forming part 21 is formed in a belt shape along the edge of the positive electrode plate along the circumferential direction of the electrode body 20 that is the winding direction.
- the positive electrode active material non-forming portion 21 is an edge portion where the positive electrode active material layer is not formed on the positive electrode base material.
- the positive electrode active material non-formation part 21 is wound in multiple layers to form a state where the positive electrode active material non-formation part 21 is laminated in multiple layers in a direction perpendicular to the winding axis A.
- the negative electrode active material non-forming portion 22 is also formed in a belt shape along the edge of the negative electrode plate along the circumferential direction of the electrode body 20. Specifically, the negative electrode active material non-formation part 22 is an edge part in which the negative electrode active material layer in the negative electrode base material is not formed. The negative electrode active material non-formation part 22 is wound in multiple layers to form a state in which a plurality of layers are stacked in a direction perpendicular to the winding axis A.
- the positive electrode terminal 30 integrally includes a rectangular plate-shaped first terminal main body portion 31 and a cylindrical first shaft portion 32 protruding from the wide flat surface of the first terminal main body portion 31.
- the negative electrode terminal 40 integrally includes a rectangular plate-like second terminal main body 41 and a cylindrical second shaft portion 42 protruding from the wide flat surface of the second terminal main body 41.
- the first shaft portion 32 and the second shaft portion 42 are configured to penetrate the lid body 12 and be connected to the positive electrode current collector 50 and the negative electrode current collector 60, respectively.
- through holes 12c and 12d are formed through the lid body 12
- the first shaft portion 32 and the second shaft portion 42 are formed in the through holes 12c and 12d, respectively. Can pass.
- the positive electrode current collector 50 and the negative electrode current collector 60 are disposed on the opposite side of the first terminal main body 31 and the second terminal main body 41 with the lid 12 interposed therebetween.
- the positive electrode current collector 50 is a member having conductivity and rigidity, and is made of a metal such as aluminum or an aluminum alloy, like the positive electrode base material of the electrode body 20.
- the negative electrode current collector 60 is a member having conductivity and rigidity, and is made of a metal such as copper or a copper alloy, like the negative electrode base material of the electrode body 20.
- the positive electrode current collector 50 includes a plate-like fixing portion 51 connected to the first shaft portion 32 and two elongated plate-like protrusions 52 connected to the positive electrode active material non-forming portion 21 of the electrode body 20. It has one.
- the negative electrode current collector 60 includes a plate-like fixing portion 61 connected to the second shaft portion 42 and two elongated plate-like protrusions 62 connected to the negative electrode active material non-forming portion 22 of the electrode body 20.
- the resin material examples include polyolefin, PPS (polyphenylene sulfide), PP (polypropylene), PFA (fluorine resin), and phenol resin.
- other resins may be used and fibers such as glass fibers are mixed. It may be a resin.
- the upper insulating members 70 and 80 and the lower insulating members 91 and 92 may have a structure constituted by two or more members made of different resin materials.
- the resin material of the insulating member that ensures airtightness is PFA (fluorine resin) or the like, and the resin material of the portion requiring structural strength is ABS, PBT (polybutylene terephthalate), polyamide (also referred to as nylon). Etc.
- the first upper insulating member 70 and the second upper insulating member 80 are examples of insulating members.
- the first shaft portion 32 of the positive electrode terminal 30 includes a through hole 71 of the first upper insulating member 70, a through hole 12 c of the lid body 12, a through hole 91 a of the first lower insulating member 91, and the positive electrode current collector 50. After sequentially passing through the through holes 51a formed in the fixed portion 51, the tip thereof is caulked. Thereby, the positive electrode terminal 30 and the positive electrode current collector 50 are joined to each other, and are attached and fixed to the lid body 12 with the first upper insulating member 70 and the first lower insulating member 91 interposed therebetween. The Note that the joining by caulking is joining using plastic deformation of the first shaft portion 32.
- the tip end of the first shaft portion 32 is subjected to a pressing force so as to be plastically deformed so as to expand in diameter on the fixed portion 51, whereby the positive electrode terminal 30 is plastically deformed with the first terminal main body portion 31.
- the positive electrode current collector 50 is joined in such a manner that the fixing portion 51 and the like are sandwiched between the portions.
- the two protrusions 52 of the positive electrode current collector 50 attached to the lid body 12 are assembled so as to be sandwiched from both sides of the positive electrode active material non-formation part 21 of the electrode body 20 and joined to the positive electrode active material non-formation part 21.
- the two protrusions 62 of the negative electrode current collector 60 attached to the lid body 12 are assembled so as to be sandwiched from both sides by the negative electrode active material non-formation part 22 of the electrode body 20, and the negative electrode active material non-formation part 22.
- welding such as ultrasonic welding and resistance welding can be used.
- the electrode body 20 is fixed to the lid body 12 with the winding axis A in a direction along the lid body 12.
- the first terminal body 31 of the positive terminal 30 and the second terminal body 41 of the negative terminal 40 both have a rectangular planar shape.
- the planar shape is a shape when the lid body 12 is viewed from the outside of the container 10 in a direction perpendicular to the outer surface 12a of the lid body 12, that is, the lid body 12 is in a plan view.
- the outer peripheral side surface of the first terminal main body 31 standing upright with respect to the outer surface 12a is connected to the curved corner cutting side surfaces 315 and 317 positioned at the corner cutting corner portions 31a and 31c, respectively, and the corner cutting corner portions 31b and 31d, respectively. It is constituted by flat corner-cutting side surfaces 316 and 318 positioned, flat long side surfaces 311 and 313 positioned opposite to each other, and flat short side surfaces 312 and 314 positioned facing each other.
- the short side surface 312 of the first terminal main body 31 is positioned toward the short side wall 11d of the container main body 11, and the long side surface 311 is positioned toward the long side wall 11c.
- the long side surface 313 is located toward the long side wall 11e.
- the curved corner cutting side surfaces 315 and 317 form a convex arcuate surface that protrudes outward along the outer surface 12a, that is, a convex curved surface.
- the curved corner cutting side surface 315 forms a corner cutting surface formed by the long side surface 311 and the short side surface 312 and extends along the tangential direction of each of the long side surface 311 and the short side surface 312.
- the curved corner cutting side surface 317 forms a corner cutting surface formed by the long side surface 313 and the short side surface 314, and extends along the tangential direction of each of the long side surface 313 and the short side surface 314.
- the curved corner-cutting side surfaces 416 and 418, the flat long side surfaces 411 and 413, and the flat short side surfaces 412 and 414 are constituted.
- the short side surface 414 of the second terminal main body 41 is positioned toward the short side wall 11f of the container main body 11, and the long side surface 411 is positioned toward the long side wall 11c.
- the long side surface 413 is located toward the long side wall 11e.
- the first upper insulating member 70 and the second upper insulating member 80 have the same configuration except that the outlines of the first terminal main body 31 and the second terminal main body 41 accommodated therein are different.
- the configuration of the first upper insulating member 70 will be mainly described.
- the first upper insulating member 70 includes a rectangular plate-shaped main body 72, a peripheral wall 73 standing upright from the periphery of the main body 72, and the main body 72 opposite to the peripheral wall 73.
- a cylindrical cylindrical portion 74 protruding in the direction and a fixing portion 75 protruding from the peripheral wall portion 73 are integrally provided.
- the main body portion 72, the peripheral wall portion 73, the cylindrical portion 74, and the fixing portion 75 are integrally formed and are formed of a continuous resin member.
- the first terminal main body 31 is configured to fit inside the peripheral wall 73 on the main body 72.
- a fitting hole (not shown) is formed in the fixing portion 75, and the fitting hole is configured to be fitted with a protrusion protruding from the lid body 12.
- the positions of the through hole 71 and the cylindrical portion 74 are not limited to the approximate center of the main body 72, and may be at any position of the main body 72.
- the long inner side surfaces 731 and 733 are flat inner side surfaces that face the long side surfaces 311 and 313 of the first terminal main body 31 and extend substantially parallel thereto.
- the short inner side surfaces 732 and 734 are flat inner side surfaces that face the short side surfaces 312 and 314 of the first terminal main body 31 and extend substantially parallel thereto.
- the curved corner-cut inner side surfaces 735 and 737 respectively face the curved corner-cut side surfaces 315 and 317 of the first terminal main body 31 and extend substantially parallel to the concave-orthogonal surface shape, that is, the concave-curved corner-cut surface. It is.
- the curved corner cutting inner surface 735 extends along the tangential direction of each of the long inner surface 731 and the short inner surface 732.
- the curved corner cutting inner surface 737 extends along the tangential direction of each of the long inner surface 733 and the short inner surface 734.
- the flat corner-cut inner side surfaces 736 and 738 are flat corner-cut surfaces that face the flat corner-cut side surfaces 316 and 318 of the first terminal main body 31 and extend substantially parallel thereto, respectively.
- the fixing portion 75 of the first upper insulating member 70 is disposed adjacent to the portion of the short inner side surface 734 in the peripheral wall portion 73.
- the rib 73e on the flat cornered inner side surface 736 is located at a position that is biased toward the short inner side surface 732 relative to the long inner side surface 733, that is, a position that is biased toward the shorter side than the long side of the peripheral wall portion 73.
- the rib 73 e on the flat cornered inner side surface 738 is located at a position biased toward the short inner side surface 734 than the long inner side surface 731, that is, a position biased toward the shorter side than the long side of the peripheral wall portion 73.
- the rotational force centering on the 1st axial part 32 acts on the 1st terminal main-body part 31 accommodated inside the surrounding wall part 73, for example, the direction of the rotational force is on FIG.
- the direction D1 is the clockwise direction
- the first terminal body 31 presses the ribs 73e on the flat corner-cut inner surfaces 736 and 738 of the peripheral wall 73.
- the first terminal main body 31 does not contact other parts of the peripheral wall 73 with a pressing force which is not in contact with or significantly weaker than the pressing force to the rib 73e on the flat corner cutting inner surfaces 736 and 738.
- the ribs 73e on the curved corner cutting inner surfaces 735 and 737 are not pressed or pressed with a pressing force significantly weaker than the pressing force to the ribs 73e on the flat corner cutting inner surfaces 736 and 738. Further, when the direction of the rotational force is a direction D2 that is a counterclockwise direction in the drawing, the first terminal body 31 presses the rib 73e on the curved corner cutting inner side surfaces 735 and 737.
- the first terminal main body 31 does not contact other parts of the peripheral wall 73 with a pressing force that does not contact or is significantly weaker than the pressing force to the rib 73e on the curved corner cutting inner surfaces 735 and 737,
- the ribs 73e on the flat corner cutting inner surfaces 736 and 738 are not pressed or pressed with a pressing force significantly weaker than the pressing force to the ribs 73e on the curved corner cutting inner surfaces 735 and 737.
- the protrusion amount of the rib 73e from the inner side surface of the peripheral wall portion 73 and the gap between the inner side surface of the peripheral wall portion 73 and the outer peripheral side surface of the first terminal main body portion 31 can be set so as to satisfy the above-described configuration.
- the rib 73e on the curved corner-cut inner side surface 735 is located more biased toward the long inner side surface 731 than the short inner side surface 732, that is, along the inner peripheral direction of the peripheral wall portion 73.
- the curved corner-cut inner surface 735 is offset from the center toward the long inner surface 731.
- the rib 73e on the curved corner cutting inner side surface 737 is located more biased toward the long inner side surface 733 than the short inner side surface 734, that is, the curved corner cutting inner side surface 737 along the inner circumferential direction of the peripheral wall portion 73. From the center to the long inner surface 733.
- Such ribs 73e allow the curved corner cutting side surfaces 315 and 317 of the first terminal main body portion 31 to approach the curved corner cutting inner side surfaces 735 and 737 at the initial stage of rotation when the first terminal main body portion 31 rotates in the direction D2. It is provided in the site to do.
- the rib 73e on the flat cornered inner side surface 736 is located more biased toward the short inner side surface 732 than the long inner side surface 733, that is, the center of the flat cornered inner side surface 736 along the inner circumferential direction of the peripheral wall portion 73.
- the rib 73e on the flat cornered inner side surface 738 is offset from the long inner side surface 731 toward the short inner side surface 734, that is, the center of the flat cornered inner side surface 738 along the inner circumferential direction of the peripheral wall portion 73. To the short inner surface 734 side.
- the rib 73e has the flat corner-cut side surfaces 316 and 318 of the first terminal main body portion 31 approaching the flat corner-cut inner side surfaces 736 and 738 at the initial stage of rotation. It is provided in the site to do.
- the corners 73a to 73d of the peripheral wall 73 receive the rotational force of the first terminal main body 31 via the rib 73e. Since the extension length in the inner peripheral direction of the portion 73 is small and has high rigidity, it is difficult to cause deformation. For this reason, deformation of the peripheral wall portion 73 is suppressed, and in particular, deformation of the portions of the long inner side surfaces 731 and 733 having the longest extension length and the relatively lowest rigidity is suppressed.
- the pressing force acting on the corner corners 73b and 73d via the rib 73e is more than the first component in the axial direction of the corner corners 73b and 73d, respectively.
- the second component in the bending direction of the corner-cut corners 73b and 73d is significantly small.
- the axial direction of the corner corners 73b and 73d is also a direction along the flat corner cutting inner surfaces 736 and 738, and the bending direction of the corner corner portions 73b and 73d is perpendicular to the flat corner cutting inner surfaces 736 and 738. It is also a direction.
- the first component of the pressing force acts in the direction toward the long inner side surface 733 with respect to the corner cut corner portion 73b, and acts in the direction toward the long inner side surface 731 with respect to the corner cut corner portion 73d. Therefore, bending deformation at the corner portions 73b and 73d is suppressed.
- the pressing force acting on the corner corners 73a and 73c via the rib 73e is more than the first component in the axial direction of the corner corners 73a and 73c.
- the second component in the bending direction of the corner-cut corners 73a and 73c is significantly small.
- the axial direction of the corner corners 73a and 73c is also the direction along the curved corner cutting inner side surfaces 735 and 737, and the bending direction of the corner cutting corner portions 73a and 73c is perpendicular to the curved corner cutting inner side surfaces 735 and 737.
- the first component of the pressing force acts on the cornered corner portion 73a in the direction toward the long inner surface 731 and acts on the cornered corner portion 73c in the direction toward the long inner surface 733. Therefore, bending deformation at the corner portions 73a and 73c is suppressed.
- the second upper insulating member 80 In the second upper insulating member 80, the arrangement of the straight corner cutting corners 41 a and 41 c and the curved corner cutting corners 41 b and 41 d of the second terminal main body 41 of the negative electrode terminal 40 to be accommodated is the positive terminal 30. Except for the difference from the first terminal main body 31, the first upper insulating member 70 has the same configuration. Referring to FIGS. 5 and 7, the second upper insulating member 80 has a main body portion 82, a peripheral wall portion 83, a cylindrical portion 84, and a fixing portion 85 that are integrally molded together.
- the peripheral wall portion 83 has an inner side surface that extends in accordance with the outer peripheral side surface shape of the second terminal main body portion 41.
- the main body portion 82 of the second upper insulating member 80 is interposed between the second terminal main body portion 41 of the negative electrode terminal 40 and the lid body 12. These are electrically insulated from each other. Further, the cylindrical portion 84 of the second upper insulating member 80 is interposed between the second shaft portion 42 of the negative electrode terminal 40 and the lid body 12 to electrically insulate them from each other. In the present embodiment, the cylindrical portion 84 and the through hole 81 are disposed at the center of the main body portion 82, but may be disposed at any position of the main body portion 82.
- the peripheral wall portion 83 of the second upper insulating member 80 includes long inner side surfaces 831 and 833, short inner side surfaces 832 and 834, flat flat cornered inner side surfaces 835 and 837, a concave arcuate surface shape, that is, a concave curved surface shape. And curved corner cutting inner surfaces 836 and 838.
- the flat cornered inner surfaces 835 and 837 are located at the cornered corners 83a and 83c of the peripheral wall 83, respectively, and the curved cornered inner surfaces 836 and 838 are respectively the cornered corners 83b and 83d of the peripheral wall 83.
- the long inner side surfaces 831 and 833, the short inner side surfaces 832 and 834, the flat corner cutting inner side surfaces 835 and 837, and the curved corner cutting inner side surfaces 836 and 838 of the peripheral wall 83 are respectively the long side surfaces 411 of the second terminal main body 41. 413, 413, short side surfaces 412 and 414, flat corner side surfaces 415 and 417, and curved corner side surfaces 416 and 418.
- the fixing portion 85 is disposed adjacent to the portion of the short inner side surface 832 in the peripheral wall portion 83.
- One rib 83e is formed on each of the flat corner cutting inner surfaces 835 and 837 and the curved corner cutting inner surfaces 836 and 838, respectively.
- the rib 83e on the flat cornered inner side surface 835 is located more biased toward the short inner side surface 832 than the long inner side surface 831.
- the rib 83e on the flat cornered inner side surface 837 is located more biased toward the short inner side surface 834 than the long inner side surface 833.
- the ribs 83e on the curved corner-cut inner surface 836 are located more biased toward the long inner surface 833 than the short inner surface 832.
- the rib 83e on the curved corner-cut inner surface 838 is located more biased toward the long inner surface 831 than the short inner surface 834. Since the other configuration and operation of the second upper insulating member 80 are the same as those of the first upper insulating member 70, description thereof will be omitted.
- the power storage device 100 includes the container 10, the positive electrode terminal 30 and the negative electrode terminal 40, and the upper portion provided between the positive electrode terminal 30 and the negative electrode terminal 40 and the lid body 12 of the container 10.
- Insulating members 70 and 80 are provided.
- the positive terminal 30 has cornered corners 31a to 31d, which are corners cut off, on the outer periphery of the first terminal body 31 of the positive terminal 30.
- the first upper insulating member 70 has a peripheral wall portion 73 that extends along the outer periphery of the first terminal main body portion 31.
- the peripheral wall portion 73 has corner corner portions 73a to 73d that are opposite to the corner corner portions 31a to 31d and are corner corners.
- Ribs 73e as protrusions are formed on the inner side surfaces 735 to 738 of the corner cutting corner portions 73a to 73d, respectively.
- the rib 73e can support the positive electrode terminal 30 in a direction facing the outer peripheral side surfaces 311 to 318 of the first terminal main body 31 of the positive electrode terminal 30.
- the insertion of the first terminal body 31 into the inner side of the peripheral wall 73 of the upper insulating member 70 is performed while the rib 73e is in contact with the cornering side surfaces 315 to 318 of the cornering corners 31a to 31d facing the rib 73e. can do.
- the contact with the rib 73e is smaller than the case where the outer peripheral side surfaces 311 to 318 of the first terminal main body 31 and the inner side surfaces 731 to 738 of the peripheral wall 73 are in direct contact because the contact area is small and the frictional resistance is low.
- the force required for insertion is small. Therefore, the clearance between the corner cut side surfaces 315 to 318 and the rib 73e can be reduced, and the movement of the first terminal body 31 in the peripheral wall 73 can be suppressed. Further, at the portion of the corner cut side surfaces 315 to 318, the clearance between the outer peripheral side surface of the first terminal main body 31 and the inner side surface of the peripheral wall 73 can be increased at least by the protrusion amount of the rib 73e. Therefore, it is easy to insert the first terminal body 31 into the inner side of the peripheral wall 73.
- the corner-cut corners 73a to 73d of the peripheral wall 73 receive a force from the first terminal body 31 via the rib 73e, the stress acting on the corner-cut corners 73a to 73d is the peripheral wall 73.
- the peripheral wall 73 Are distributed to portions adjacent to the corner portions 73a to 73d. For this reason, the damage of the surrounding wall part 73 and the fall of durability are suppressed.
- the negative electrode terminal 40 and the second upper insulating member 80 also have the above-described configuration and can exhibit the above-described effects as the positive electrode terminal 30 and the first upper insulating member 70.
- the rib 73e is displaced from the center of each of the corner inner surfaces 735 to 738 of the corner corners 73a to 73d in the outer peripheral direction of the first terminal body 31 of the positive electrode terminal 30. Located. In the above-described configuration, when the first terminal main body 31 rotates along the outer circumferential direction thereof and the rib 73e comes into contact with the corner cut inner surfaces 735 to 738 of the corner cut corners 73a to 73d, the rotation is stopped. . At this time, the corner-cut corners 73a to 73d are pressed via the ribs 73e at positions shifted from the central portions of the corner-cut inner side surfaces 735 to 738.
- the negative electrode terminal 40 and the second upper insulating member 80 also have the above-described configuration and can exhibit the above-described effects as the positive electrode terminal 30 and the first upper insulating member 70.
- corner side surfaces 315 to 318 of corner corner portions 31 a to 31 d of first terminal body portion 31 of positive electrode terminal 30 extend along the outer periphery of first terminal body portion 31.
- the inner side surfaces 735 to 738 of the corner cutting corners 73a to 73d of the first upper insulating member 70 are flat surfaces extending along and facing the flat surface or the convex curved surface. It is a surface or a concave curved surface.
- the ribs 73e on the curved corner cutting inner side surfaces 735 and 737 which are concave curved surfaces of the peripheral wall portion 73, are biased inward in the longitudinal direction from the central portion of the curved corner cutting inner side surfaces 735 and 737 in the outer peripheral direction. Located.
- the first terminal main body 31 of the positive electrode terminal 30 when the rotation that causes the length to be directed toward the flat corner cutting inner surface 736 or 738 occurs, the flat corner cutting inner surface 736 at the initial stage of the rotation. And a contact with the rib 73e on at least one of 738, the rotation of the first terminal body 31 is stopped. Further, in the first terminal main body 31, when a rotation that causes the longitudinal direction of the first terminal main body portion 31 to be directed toward the curved corner cutting inner side surface 735 or 737 occurs, at least one of the curved corner cutting inner side surfaces 735 and 737 at the initial stage of the rotation. The rib 73e comes into contact, and the rotation of the first terminal body 31 is stopped.
- the first terminal body 31 when the first terminal body 31 is rotated, it can be configured to suppress contact between the first terminal body 31 and the peripheral wall 73 at a place other than the rib 73e.
- the negative electrode terminal 40 and the second upper insulating member 80 also have the above-described configuration and can exhibit the above-described effects as the positive electrode terminal 30 and the first upper insulating member 70.
- a combination of flat surfaces and a combination of a convex curved surface and a concave curved surface are mixed and arranged on the corner cutting surfaces of the four corner cutting corner portions 31a to 31d and the corner cutting corner portions 73a to 73d.
- the orientation of the first terminal body 31 with respect to the peripheral wall 73 can be easily positioned.
- the negative electrode terminal 40 and the second upper insulating member 80 also have the above-described configuration and can exhibit the above-described effects as the positive electrode terminal 30 and the first upper insulating member 70.
- the planar shape of the outer periphery of the first terminal main body 31 of the positive electrode terminal 30 and the inner periphery of the peripheral wall 73 with respect to the lid 12 of the container 10 is a rectangular shape, and the flat surface is
- the two cornering corners 31b and 31d including the two cornering corners 73b and 73d including the flat surface are in a diagonal position relationship, respectively, and the two cornering corners 31a and 31c including the convex curved surface and the concave curved surface are included.
- Two corner-cut corners 73a and 73d including each have a diagonal position relationship.
- the first terminal main body portion 31 of the positive electrode terminal 30 is rotated so that its longitudinal direction is directed from the curved inner corner surface 735 or 737 of the peripheral wall portion 73 toward the inner flat surface 736 or 738.
- contact is made with the rib 73e on the flat corner cut inner surfaces 736 and 738, and the rotation of the first terminal body 31 is stopped.
- the first terminal main body 31 when the first terminal main body 31 is rotated so that the longitudinal direction of the first terminal main body 31 is directed from the flat corner cutting inner surface 736 or 738 of the peripheral wall portion 73 to the curved corner cutting inner surface 735 or 737, Contact is made to the ribs 73e on the inner side surfaces 735 and 737, and the rotation of the first terminal body 31 is stopped. Therefore, when the first terminal body 31 is rotated, it can be configured to suppress contact between the first terminal body 31 and the peripheral wall 73 at a place other than the rib 73e.
- the negative electrode terminal 40 and the second upper insulating member 80 also have the above-described configuration and can exhibit the above-described effects as the positive electrode terminal 30 and the first upper insulating member 70.
- the rib 73e has a convex curved surface including a curve in the outer peripheral direction of the first terminal body 31 of the positive electrode terminal 30, and extends in a direction intersecting the lid 12 of the container 10. It is an existing columnar protrusion. In the above-described configuration, the rib 73e comes into contact with the linear contact portion along the axial direction of the columnar protrusion on the convex curved surface, so that the contact area can be kept low. The rib 73e supports the first terminal body 31 not only in the direction along the lid 12 but also in the direction intersecting with the lid 12. Note that the negative electrode terminal 40 and the second upper insulating member 80 also have the above-described configuration and can exhibit the above-described effects as the positive electrode terminal 30 and the first upper insulating member 70.
- the stacked electrode body 20 is a wound electrode body formed by winding a stacked positive electrode plate, negative electrode plate, and separator, but is not limited thereto. It is not something.
- the stacked electrode body may be a stack type electrode body formed by stacking a large number of positive electrode plates, negative electrode plates and separators, and one or more sets of stacked positive electrode plates, negative electrode plates and separators. It may be a Z-shaped electrode body formed by bending a plurality of wires.
- the first terminal main body 31 of the positive electrode terminal 30 and the second terminal main body 41 of the negative electrode terminal 40 are two linear corner-cut corners that are in a diagonal position relative to each other. And two curved corners that are diagonally opposite each other.
- the peripheral wall portion 73 of the first upper insulating member 70 and the peripheral wall portion 83 of the second upper insulating member 80 have two linear corner-cut corners that are diagonal to each other and a diagonal relationship to each other. With two curved corners.
- the combination and quantity of the straight corner corner and the curved corner corner are not limited to the above configuration. All four corners may be straight corner corners or curved corner corners.
- One of the four corners is a straight corner corner or a curved corner corner, and the other three of the four corners are curved corner corners or straight corners.
- a cut corner may be used.
- Linear corner cutting corners or curved corner cutting corners may be adjacent corners.
- the combination and quantity of straight corners and curved corners are not limited to the above configuration.
- the curved corner portions of the first terminal main body 31 and the second terminal main body 41, the peripheral wall 73 of the first upper insulating member 70, and the second upper insulating member 80 has an arcuate curved surface, but is not limited thereto.
- the curved corner corner and the curved corner corner may have any curved surface.
- the curved corner corners of the first terminal body 31 and the second terminal body 41 have a concave curved surface
- the curved corner corners of the peripheral wall portions 73 and 83 have a convex curved surface. May be.
- the first terminal main body 31 of the positive electrode terminal 30 and the second terminal main body 41 of the negative electrode terminal 40 have a rectangular planar shape, but are not limited thereto. It may have a circular, elliptical, or other polygonal planar shape.
- a corner corner portion having a corner cutting surface along a circular chord can be formed.
- one rib 73e or 83e is formed at one corner of the peripheral wall 73 of the first upper insulating member 70 and the peripheral wall 83 of the second upper insulating member 80.
- two or more ribs may be formed.
- one of the two ribs at one corner is subjected to the pressing force of the first terminal body 31 or the second terminal body 41 of the negative terminal 40 rotating in the direction D1, and the two ribs The other of them can be configured to receive the pressing force of the first terminal body 31 or the second terminal body 41 of the negative terminal 40 rotating in the direction D2.
- the ribs may be provided at the two corner-cutting corners in the diagonal positional relationship without providing the ribs at all the four corner-cutting corners. Also by this, the contact between the first terminal body 31 or the second terminal body 41 of the negative terminal 40 and the peripheral wall 73 or 83 can be suppressed.
- the ribs on the flat corner-cut inner surfaces of the corner cut corners are:
- the ribs on the concave inner surface of the corner-cut corner are positioned more biased toward the longer inner surface than the shorter inner surface.
- the rib may be at the center of the inner corner surface or at any position on the inner corner surface.
- the position of the rib on the inner side surface of the corner cut can be set according to the shape and size of the first terminal main body 31 and the second terminal main body 41, the shape of the rib, the protruding amount, and the like.
- the ribs 73e and 83e of the peripheral wall 73 of the first upper insulating member 70 and the peripheral wall 83 of the second upper insulating member 80 are the corners of the corners of the peripheral wall.
- the rib may have any shape as long as it has a shape protruding from the inner side surface of the corner cut.
- the columnar rib may have a shape along the longitudinal direction, that is, the extending direction of the peripheral wall portions 73 and 83 that intersect the upright direction, instead of the vertical direction of the peripheral wall portions 73 and 83.
- the rib may be a simple protrusion instead of the columnar shape.
- the protrusion may have a stepped step shape having one or more steps in the plan view of the lid body 12.
- the stepped step may be formed at a boundary portion between the corner cutting inner side surface of the peripheral wall portion and the long inner side surface or the short inner side surface of the peripheral wall portion, or may be formed on the corner cutting inner side surface. Good.
- the stepped step may extend over the entire peripheral wall in the upright direction of the peripheral wall, or may extend over a part of the peripheral wall.
- the stepped step is the first terminal body.
- the part 31 and the second terminal body 41 may be formed at a boundary portion between the long side surface or the short side surface and the corner cut side surface, or may be formed on the corner cut side surface.
- the stepped steps may extend over the whole or part of them in the upright direction of the side surfaces of the first terminal main body 31 and the second terminal main body 41.
- the ribs 73e and 83e are formed on the peripheral wall portion 73 of the first upper insulating member 70 and the peripheral wall portion 83 of the second upper insulating member 80, but the present invention is not limited thereto. Not a thing.
- the ribs may be formed on the flat and cut corner sides of the first terminal body 31 of the positive terminal 30 and the second terminal body 41 of the negative terminal 40.
- the rib may be formed in one or both of the peripheral wall portion 73 and the first terminal main body portion 31, and the rib is either one of the peripheral wall portion 83 or the second terminal main body portion 41. Alternatively, both may be formed in a mixed manner.
- the power storage device 100 includes one electrode body.
- the power storage element may be configured to include two or more electrode bodies.
- the electrode body 20 has a configuration in which the positive electrode current collector 50 and the negative electrode current collector 60 are connected to each other at the positive electrode active material non-forming part 21 and the negative electrode active material non-forming part 22.
- the electrode body has a positive electrode current collecting tab group composed of a positive electrode current collecting tab projecting from the positive electrode base material and a negative electrode current collector tab composed of a negative electrode current collecting tab projecting from the negative electrode base material at each of its two ends. You may have an electric tab group.
- the positive electrode current collecting tab group and the negative electrode current collecting tab group may be disposed at one end of the electrode body. In the above-described configuration, the positive electrode current collector tab group and the negative electrode current collector tab group are connected to the positive electrode current collector and the negative electrode current collector, respectively.
- the power storage device 100 is configured to include the vertically wound electrode body 20, but the electrode is oriented in such a direction that the end of the electrode body 20 in the winding axis A direction faces the lid body 12 of the container 10.
- positioned may be sufficient.
- the power storage element 100 has been described as a nonaqueous electrolyte secondary battery such as a lithium ion secondary battery, but the power storage element includes an electrode terminal and an insulating member for the electrode terminal.
- a power storage element having any configuration may be used.
- the present invention can be realized not only as a power storage element as described above but also in a power storage device including one or more power storage elements.
- the power storage device may include a plurality of power storage units arranged and arranged, and each power storage unit may be configured to include a plurality of power storage elements 100 arranged and arranged.
- the power storage device may include a plurality of power storage units arranged and arranged, and each power storage unit may be configured to include a plurality of power storage elements 100 arranged and arranged.
- a plurality of power storage elements 100 are used as one unit, and the quantity and arrangement of power storage units can be selected according to the electric capacity required for the power storage device, the shape and dimensions of the power storage device, and the like.
- the present invention can be applied to power storage elements such as lithium ion secondary batteries.
Abstract
Description
実施の形態に係る蓄電素子100の構成を説明する。図1は、実施の形態に係る蓄電素子100の外観を模式的に示す斜視図である。図1に示されるように、蓄電素子100は、扁平な直方体状の外形を有している。蓄電素子100は、充放電可能な二次電池である。例えば、蓄電素子100は、リチウムイオン二次電池などの非水電解質二次電池である。しかしながら、蓄電素子100は、非水電解質二次電池に限定されず、非水電解質二次電池以外の二次電池であってもよく、使用者が充電をしなくても蓄えられている電気を使用できる一次電池であってもよく、キャパシタであってもよい。
以上、本発明の実施の形態に係る蓄電素子について説明したが、本発明は、実施の形態に限定されるものではない。つまり、今回開示された実施の形態は全ての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上述した説明ではなくて請求の範囲によって示され、請求の範囲と均等の意味及び範囲内での全ての変更が含まれることが意図される。
12 蓋体(壁部)
30 正極端子(電極端子)
31 第一端子本体部
31a,31b,31c,31d 隅切り角部
40 負極端子(電極端子)
41 第二端子本体部
41a,41b,41c,41d 隅切り角部
70 第一上部絶縁部材(絶縁部材)
73,83 周囲壁部
73a,73b,73c,73d 隅切り隅部
73e,83e リブ(突起)
80 第二上部絶縁部材(絶縁部材)
83a,83b,83c,83d 隅切り隅部
100 蓄電素子
315,316,317,318 隅切り側面(隅切り面)
415,416,417,418 隅切り側面(隅切り面)
735,736,737,738 隅切り内側面(隅切り面)
835,836,837,838 隅切り内側面(隅切り面)
Claims (7)
- 容器と、
電極端子と、
前記電極端子と前記容器の壁部との間に設けられる絶縁部材とを備え、
前記電極端子は、前記電極端子の外周に、隅切りされた角部である隅切り角部を有し、
前記絶縁部材は、前記電極端子の外周に沿って延在する周囲壁部を有し、
前記周囲壁部は、前記隅切り角部に対向し且つ隅切りされた隅部である隅切り隅部を有し、
前記隅切り角部の隅切り面、又は、前記隅切り隅部の隅切り面に、突起が形成されている
蓄電素子。 - 前記突起は、前記電極端子の外周方向で、前記隅切り角部の隅切り面の中央部又は前記隅切り隅部の隅切り面の中央部からずれて位置する
請求項1に記載の蓄電素子。 - 前記隅切り角部の隅切り面は、前記電極端子の外周に沿って延在する平坦面又は凸曲面であり、
前記隅切り隅部の隅切り面は、前記隅切り角部の隅切り面を形成する平坦面又は凸曲面に沿い且つ対向して延在する平坦面又は凹曲面である
請求項1または2に記載の蓄電素子。 - 前記電極端子は、長手と、前記長手に交差する短手とを含む形状を有し、
前記平坦面にある場合の前記突起は、前記電極端子の外周方向での前記平坦面の中央部よりも前記電極端子の長手方向外方へ偏って位置し、
前記凸曲面又は前記凹曲面にある場合の前記突起は、前記電極端子の外周方向での前記凸曲面又は前記凹曲面の中央部よりも前記電極端子の長手方向内方へ偏って位置する
請求項3に記載の蓄電素子。 - 前記電極端子は、4つの前記隅切り角部を有し、
前記周囲壁部は、4つの前記隅切り隅部を有し、
4つの前記隅切り角部のうちの少なくとも1つの前記隅切り角部の隅切り面が、前記電極端子の外周に沿って延在する平坦面であり、少なくとも1つの前記隅切り角部の隅切り面が、前記電極端子の外周に沿って延在する凸曲面であり、
4つの前記隅切り隅部のうちの少なくとも1つの前記隅切り隅部の隅切り面が、前記隅切り角部の前記平坦面に沿い且つ対向して延在する平坦面であり、少なくとも1つの前記隅切り隅部の隅切り面が、前記隅切り角部の前記凸曲面に沿い且つ対向して延在する凹曲面である
請求項1~4のいずれか一項に記載の蓄電素子。 - 前記壁部に対する前記電極端子の外周及び前記周囲壁部の内周の平面形状が、長方形状であり、
前記平坦面を含む2つの前記隅切り角部及び前記平坦面を含む2つの前記隅切り隅部がそれぞれ、対角位置関係にあり、
前記凸曲面を含む2つの前記隅切り角部及び前記凹曲面を含む2つの前記隅切り隅部がそれぞれ、対角位置関係にあり、
前記平坦面上の前記突起は、前記電極端子の外周方向での前記平坦面の中央部よりも前記電極端子又は前記周囲壁部の短辺に向かって偏って位置し、
前記凸曲面又は前記凹曲面上の前記突起は、前記電極端子の外周方向での前記凸曲面又は前記凹曲面の中央部よりも前記電極端子又は前記周囲壁部の長辺に向かって偏って位置する
請求項5に記載の蓄電素子。 - 前記突起は、前記電極端子の外周方向での湾曲を含む凸曲面を有し且つ前記壁部と交差する方向に延在する柱状突起である
請求項1~6のいずれか一項に記載の蓄電素子。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/066,333 US10637014B2 (en) | 2015-12-28 | 2016-12-28 | Energy storage device |
CN201680073191.1A CN108370018A (zh) | 2015-12-28 | 2016-12-28 | 蓄电元件 |
JP2017559242A JPWO2017115857A1 (ja) | 2015-12-28 | 2016-12-28 | 蓄電素子 |
DE112016006088.2T DE112016006088T5 (de) | 2015-12-28 | 2016-12-28 | Energiespeichervorrichtung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015-257539 | 2015-12-28 | ||
JP2015257539 | 2015-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017115857A1 true WO2017115857A1 (ja) | 2017-07-06 |
Family
ID=59225069
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/089145 WO2017115857A1 (ja) | 2015-12-28 | 2016-12-28 | 蓄電素子 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10637014B2 (ja) |
JP (1) | JPWO2017115857A1 (ja) |
CN (1) | CN108370018A (ja) |
DE (1) | DE112016006088T5 (ja) |
WO (1) | WO2017115857A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3451408A1 (en) * | 2017-08-30 | 2019-03-06 | Contemporary Amperex Technology Co., Limited | Cap assembly for secondary battery, secondary battery and battery module |
JP2019133826A (ja) * | 2018-01-31 | 2019-08-08 | 株式会社Gsユアサ | 蓄電素子 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009259651A (ja) * | 2008-04-17 | 2009-11-05 | Hitachi Maxell Ltd | 密閉型電池の製造方法 |
JP2014116132A (ja) * | 2012-12-07 | 2014-06-26 | Mitsubishi Heavy Ind Ltd | 固定構造、および、電池の製造方法 |
JP2015005479A (ja) * | 2013-06-24 | 2015-01-08 | 株式会社Gsユアサ | 蓄電素子 |
WO2015141570A1 (ja) * | 2014-03-18 | 2015-09-24 | 日立オートモティブシステムズ株式会社 | 二次電池 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH088519Y2 (ja) | 1991-01-21 | 1996-03-06 | 古河電池株式会社 | 蓄電池用端子固定装置 |
KR100561300B1 (ko) * | 2004-01-13 | 2006-03-15 | 삼성에스디아이 주식회사 | 이차 전지 |
US9293756B2 (en) | 2010-09-17 | 2016-03-22 | Samsung Sdi Co., Ltd. | Rechargeable battery |
KR102115861B1 (ko) | 2011-08-29 | 2020-05-27 | 가부시키가이샤 지에스 유아사 | 접속체, 접속체의 제조 방법, 축전 소자 및 축전 소자의 제조 방법 |
JP2013149435A (ja) | 2012-01-18 | 2013-08-01 | Toyota Motor Corp | 電池 |
CN203039014U (zh) | 2013-01-21 | 2013-07-03 | 宁德新能源科技有限公司 | 动力电池 |
JP2014150047A (ja) | 2013-08-08 | 2014-08-21 | Hitachi Vehicle Energy Ltd | 蓄電素子 |
JP6193069B2 (ja) | 2013-09-20 | 2017-09-06 | 日立オートモティブシステムズ株式会社 | 扁平捲回式二次電池 |
JP2015191796A (ja) | 2014-03-28 | 2015-11-02 | 株式会社東芝 | 電池 |
-
2016
- 2016-12-28 DE DE112016006088.2T patent/DE112016006088T5/de not_active Withdrawn
- 2016-12-28 JP JP2017559242A patent/JPWO2017115857A1/ja active Pending
- 2016-12-28 US US16/066,333 patent/US10637014B2/en active Active
- 2016-12-28 WO PCT/JP2016/089145 patent/WO2017115857A1/ja active Application Filing
- 2016-12-28 CN CN201680073191.1A patent/CN108370018A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009259651A (ja) * | 2008-04-17 | 2009-11-05 | Hitachi Maxell Ltd | 密閉型電池の製造方法 |
JP2014116132A (ja) * | 2012-12-07 | 2014-06-26 | Mitsubishi Heavy Ind Ltd | 固定構造、および、電池の製造方法 |
JP2015005479A (ja) * | 2013-06-24 | 2015-01-08 | 株式会社Gsユアサ | 蓄電素子 |
WO2015141570A1 (ja) * | 2014-03-18 | 2015-09-24 | 日立オートモティブシステムズ株式会社 | 二次電池 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3451408A1 (en) * | 2017-08-30 | 2019-03-06 | Contemporary Amperex Technology Co., Limited | Cap assembly for secondary battery, secondary battery and battery module |
EP3664182A1 (en) * | 2017-08-30 | 2020-06-10 | Contemporary Amperex Technology Co., Limited | Cap assembly for secondary battery, secondary battery and battery module |
US11637345B2 (en) | 2017-08-30 | 2023-04-25 | Contemporary Amperex Technology Co., Limited | Cap assembly for secondary battery, secondary battery and battery module |
JP2019133826A (ja) * | 2018-01-31 | 2019-08-08 | 株式会社Gsユアサ | 蓄電素子 |
JP7095293B2 (ja) | 2018-01-31 | 2022-07-05 | 株式会社Gsユアサ | 蓄電素子 |
Also Published As
Publication number | Publication date |
---|---|
DE112016006088T5 (de) | 2018-09-13 |
US20190019999A1 (en) | 2019-01-17 |
JPWO2017115857A1 (ja) | 2018-11-01 |
US10637014B2 (en) | 2020-04-28 |
CN108370018A (zh) | 2018-08-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6780419B2 (ja) | 蓄電素子 | |
JP6124175B2 (ja) | 蓄電素子 | |
EP2610945A1 (en) | Stacked cell | |
WO2017115859A1 (ja) | 蓄電素子 | |
JP6911768B2 (ja) | 蓄電素子 | |
JP6535982B2 (ja) | 蓄電素子 | |
WO2017115857A1 (ja) | 蓄電素子 | |
JP2017199652A (ja) | 蓄電素子 | |
JP6299243B2 (ja) | 蓄電素子及び安全弁 | |
JP2018055893A (ja) | 蓄電素子 | |
US11610743B2 (en) | Energy storage device | |
JP6447015B2 (ja) | 蓄電装置、及び蓄電装置の製造方法 | |
JP2017120743A (ja) | 蓄電素子 | |
US10644293B2 (en) | Energy storage device | |
JP6816353B2 (ja) | 蓄電素子 | |
JP2019009045A (ja) | 蓄電素子 | |
JP6459505B2 (ja) | 蓄電素子 | |
JP2019029209A (ja) | 蓄電素子 | |
JP6950201B2 (ja) | 蓄電素子 | |
JP2018037283A (ja) | 蓄電素子 | |
JP2020155283A (ja) | 蓄電素子及び蓄電装置 | |
JP2020166969A (ja) | 蓄電素子及びその製造方法 | |
JP7040060B2 (ja) | 蓄電素子 | |
JPWO2019189341A1 (ja) | 蓄電素子 | |
JP2019179740A (ja) | 蓄電素子 |
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: 16881831 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2017559242 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 112016006088 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 16881831 Country of ref document: EP Kind code of ref document: A1 |