WO2013030880A1 - 電池、組電池及び搭載機器 - Google Patents
電池、組電池及び搭載機器 Download PDFInfo
- Publication number
- WO2013030880A1 WO2013030880A1 PCT/JP2011/004831 JP2011004831W WO2013030880A1 WO 2013030880 A1 WO2013030880 A1 WO 2013030880A1 JP 2011004831 W JP2011004831 W JP 2011004831W WO 2013030880 A1 WO2013030880 A1 WO 2013030880A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- terminal
- flat plate
- terminal electrode
- lid
- electrode
- Prior art date
Links
- 238000010248 power generation Methods 0.000 claims abstract description 29
- 238000000605 extraction Methods 0.000 claims abstract description 18
- 239000012212 insulator Substances 0.000 claims description 45
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract 3
- 238000005452 bending Methods 0.000 abstract 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 20
- 238000012986 modification Methods 0.000 description 13
- 230000004048 modification Effects 0.000 description 13
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 239000008151 electrolyte solution Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000002788 crimping Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011255 nonaqueous electrolyte Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Images
Classifications
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- H01M50/172—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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/562—Terminals characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- 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
-
- 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 a terminal electrode mounting structure that is mounted on a battery.
- Patent Document 1 discloses a metal plate of a power generation element in which a terminal lead-through hole is drilled, a lid plate having an upper surface formed with an anti-rotation portion projecting upward, and a lower portion penetrates into the battery case through the terminal lead-through hole.
- a take-out electrode that is connected to the foil and sealed and fixed to the cover plate via an insulating sealant, a connection electrode that is connected and fixed to the top of the take-out electrode, and a bolt portion protruding above the pedestal
- an external terminal whose rotation about the axis of the bolt portion is restricted by passing the bolt portion through the terminal through hole of the connection electrode from below and locking the pedestal portion to the anti-rotation portion of the lid plate.
- an object of the present invention is to reduce the external force applied to the attaching portion of the extraction electrode.
- a battery according to the present invention includes (1) a bottomed cylindrical case that houses a power generation element, a lid of the case, and an exterior of the case.
- a terminal electrode extending in the thickness direction and a take-out electrode that penetrates the lid and takes out the power of the power generation element to the outside of the case, and is in a position different from the terminal electrode in a plane including the lid
- a connecting member that connects the extraction electrode and the terminal electrode and the extraction electrode, the terminal electrode receiving an external force in a thickness direction of the lid body,
- the connection member including a thin portion that allows the connection member to be bent.
- connection member is located at a height different from the first flat plate portion to which the terminal electrode is connected and the first flat plate portion, and the extraction electrode is connected to the connection plate.
- the second flat plate portion is formed in a step shape having the second flat plate portion, and the thin portion is formed in the second flat plate portion. According to the configuration of (2), it is possible to reduce the external force applied to the attachment portion of the extraction electrode while suppressing the decrease in the rigidity of the connection member.
- the thin-walled portion forms a concave-shaped portion on an end surface of the second flat plate portion in the direction in which the terminal electrode extends, on an end surface close to the lid body.
- connection member includes an inclined flat plate portion that connects the first flat plate portion and the second flat plate portion, and the thin portion includes the thin plate portion, It can form in the boundary part with the said inclination flat plate part in a 2nd flat plate part.
- connection member since the connection member can be bent at a position farther from the attachment portion of the attachment electrode and the second flat plate portion, the external force transmitted to the attachment portion of the extraction electrode is more effectively applied. Can be reduced.
- a bus bar is inserted through the terminal electrode, and a nut for fixing the bus bar is fastened to the outer surface of the terminal electrode. It can suppress that the external force added to a terminal electrode by fastening a nut transmits to the attaching part of a taking-out electrode.
- the negative electrode terminal electrode made of copper and the positive electrode terminal electrode made of aluminum are provided, and the concave portion has the positive electrode terminal electrode and the negative electrode terminal electrode Can be formed only on the positive terminal electrode.
- An assembled battery may be obtained by connecting a plurality of the batteries (1) to (7).
- the assembled battery may be a power source that supplies driving power to a motor that drives the vehicle.
- the assembled battery may be a power source for driving the electric tool.
- bolt (positive electrode) and an electric power generation element Embodiment 3
- bolt (positive electrode) and an electric power generation element Embodiment 3
- bolt (positive electrode) and an electric power generation element and illustrates the state by which the concave shape part was provided in the upper surface of the terminal fixing surface (modification 1).
- bolt (positive electrode) and an electric power generation element and illustrates the state by which the concave shape part was provided in the upper surface of the inclination flat plate part (modification 1).
- bolt (positive electrode) and an electric power generation element illustrates the state by which the concave shape part was provided in the upper surface of the terminal fastening surface (modification 1). It is sectional drawing of the connection structure of a terminal volt
- FIG. 1 is a cross-sectional view of a vehicle battery 1 according to the present embodiment, and an X axis, a Y axis, and a Z axis are three mutually orthogonal three axes. In FIG. 1, in order to simplify the drawing, the symbols of some elements are omitted.
- the vehicle battery 1 is a non-aqueous electrolyte secondary battery. In the present embodiment, the nonaqueous electrolyte secondary battery is used as the vehicle battery, but a nickel hydrogen battery or the like may be used.
- the vehicle battery 1 includes a battery case 10, a lid 11, a power generation element 12, a terminal bolt (positive electrode) 13, and a terminal bolt (negative electrode) 14.
- the power generation element 12 is accommodated in the battery case 10 together with the electrolytic solution.
- the power generation element 12 includes a positive electrode body, a negative electrode body, and a separator disposed between the positive electrode body and the negative electrode body.
- a positive electrode end coating portion 12a is formed at one end portion of the power generation element 12 in the Y axis direction, and a negative electrode side uncoated portion 12b is formed at the other end portion in the Y axis direction.
- a current collecting terminal (positive electrode) 131 is electrically and mechanically connected to the positive electrode side end coating portion 12a, and a current collecting terminal (negative electrode) 141 is electrically and mechanically connected to the negative electrode side end coating portion 12b. Mechanically connected.
- the current collector terminal (positive electrode) 131 and the terminal bolt (positive electrode) 13 as the terminal electrode (positive electrode terminal electrode) are arranged at different positions in the plane including the lid 11, that is, in the plane including the XY plane. Yes.
- the current collecting terminal (positive electrode) 131 is connected to the terminal bolt (positive electrode) 13 through a connecting member (positive electrode) 132.
- the current collector terminal (negative electrode) 141 and the terminal bolt (negative electrode) 14 as the negative electrode terminal electrode are arranged at different positions in the plane including the lid 11, that is, in the plane including the XY plane.
- the current collecting terminal (negative electrode) 141 is connected to the terminal bolt (negative electrode) 14 through a connecting member (negative electrode) 142. Thereby, the electric power of the power generation element 12 can be taken out via the terminal bolt (positive electrode) 13 and the terminal bolt (negative electrode) 14.
- FIG. 2 is an exploded perspective view of the connection structure.
- FIG. 3 is a cross-sectional view of the connection structure.
- the terminal bolt (positive electrode) 13 includes a pedestal portion 13a and a protruding portion 13b extending from the pedestal portion 13a.
- the pedestal portion 13a is formed in a rectangular shape when viewed in the Z-axis direction. However, the four corners of the pedestal portion 13a are formed by curved surfaces.
- the protrusion 13b has a circular cross section in the XY plane direction, and a thread groove is formed on the outer peripheral surface.
- connection member (positive electrode) 132 is positioned at a height different from the terminal fastening surface 132a as the first flat plate portion to which the terminal bolt (positive electrode) 13 is connected, and the terminal fastening surface 132a.
- a stepped shape having a terminal fixing surface 132b as a second flat plate portion to which a rivet portion 131a which is a part of 131 is connected, and an inclined flat plate portion 132c connecting the terminal fastening surface 132a and the terminal fixing surface 132b. Is formed.
- the terminal fastening surface 132a extends in the plane including the lid 11, that is, in the XY plane direction, and a terminal insertion hole 132a1 penetrating in the plate thickness direction (Z-axis direction) is formed at the center thereof.
- the terminal fixing surface 132b extends in the plane including the lid 11, that is, in the XY plane direction, and a crimping hole portion 132b1 penetrating in the thickness direction (Z-axis direction) is formed at the center thereof.
- the inclined flat plate portion 132c extends in a direction inclined with respect to the terminal fastening surface 132a.
- the connecting member (positive electrode) 132 may be configured by press-molding a metal plate. This metal plate may be aluminum.
- the terminal fixing surface 132b is formed with a thin portion 132d that allows the connecting member (positive electrode) 132 to bend when the terminal bolt (positive electrode) 13 receives an external force in the thickness direction (Z-axis direction) of the lid 11. ing.
- the thin-walled portion 132d is configured by forming a concave-shaped portion 132e on the surface close to the lid body 11 (the surface facing the insulator 133) of the end surface in the Z-axis direction of the terminal fixing surface 132b.
- a protruding portion 13b of a terminal bolt (positive electrode) 13 is inserted into the terminal insertion hole portion 132a1 in the terminal fastening surface 132a, and a through hole of the bus bar 40 is inserted into the protruding portion 13b and tightened.
- the nut 41 is fastened.
- the bus bar 40 is electrically connected to the terminal bolt (positive electrode) 13.
- the bus bar 40 is connected to a terminal bolt (negative electrode) of an adjacent battery (not shown).
- An assembled battery is configured by connecting a plurality of vehicle batteries 1 using the bus bar 40. This assembled battery can be used as a power source for a motor that drives the vehicle.
- the bus bar 40 may be used for connecting a plurality of vehicle batteries 1 in parallel.
- the insulator 133 as an insulator is formed with a pedestal housing portion 133a in which a part of the insulator 133 is recessed and a terminal support portion 133b that supports the terminal fixing surface 132b.
- the insulator 133 is sandwiched between the lid body 11 and the terminal bolt (positive electrode) 13. Thereby, it is possible to prevent the terminal bolt (positive electrode) 13 and the terminal bolt (negative electrode) 14 from being short-circuited via the lid 11.
- the insulating material constituting the insulator 133 may be a resin (for example, PPS resin).
- the insulator 133 may be integrally formed by an injection molding method.
- the pedestal accommodating part 133a is formed so as to surround the pedestal part 13a.
- the pedestal portion 13a overlaps the thick portion of the insulator 133 when viewed in the horizontal direction (Y-axis direction). That is, the inner bottom surface of the pedestal accommodating portion 133a is located below the support surface of the terminal support portion 133b. Therefore, a horizontal force applied to the wall surface of the pedestal housing portion 133a from the pedestal portion 13a of the terminal bolt (positive electrode) 13 during traveling of the vehicle can be received by the thick portion of the insulator 133. Thereby, it is suppressed that the wall part of the base accommodating part 133a bends, and the position shift of the terminal bolt (positive electrode) 13 can be prevented.
- the pedestal portion 13a of the terminal bolt (positive electrode) 13 is surrounded by the pedestal accommodating portion 133a, the pedestal portion 13a can be prevented from being displaced in the horizontal direction. Thereby, it is possible to prevent the vehicle battery 1 from being short-circuited by the contact between the terminal bolt (positive electrode) 13 and the lid 11. Furthermore, since the pedestal portion 13a of the terminal bolt (positive electrode) 13 is buried in the insulator 133, the vehicle battery 1 can be downsized in the height direction (Z-axis direction).
- the terminal fixing surface 132b of the connection member (positive electrode) 132 is placed on the terminal support portion 133b of the insulator 133.
- An insulator opening 133c is formed in the terminal support portion 133b.
- the insulator opening 133c is located at a position overlapping the crimping hole 132b1 of the terminal fixing surface 132b when viewed in the Z-axis direction.
- the terminal support portion 133b is formed with an outer wall portion 133d that surrounds the outer periphery of the terminal fixing surface 132b, and the movement of the terminal fixing surface 132b in the horizontal direction is suppressed by contacting the outer wall portion 133d.
- FIG. A pair of protrusions 133e are formed at the lower end of the insulator 133, and these protrusions 133e are formed at a predetermined interval in the Y-axis direction.
- the insulator 133 is formed with a convex shape portion 133f in a region facing the concave shape portion 132e of the terminal fixing surface 132b, and the convex shape portion 133f extends toward the inside of the concave shape portion 132e. .
- a clearance is formed between the convex portion 133f and the concave portion 132e.
- a gas release valve 11d is formed in the approximate center of the lid 11 in the Y-axis direction.
- the gas release valve 11d is a destructive valve formed by reducing the thickness of the lid 11, and breaks when the internal pressure of the battery case 10 reaches the operating pressure when the battery is abnormal. Thereby, the pressure rise of the battery case 10 can be suppressed.
- An electrolyte solution inlet 11e is formed between the gas release valve 11d and the terminal bolt (positive electrode) 13 in the lid 11, and the electrolyte solution is introduced into the battery case 10 through the electrolyte solution inlet 11e. Injected.
- An insulator 133 is fixed to one end of the lid 11 in the Y-axis direction.
- the lid 11 is formed with a first insulator detent portion 11a and a second insulator detent portion 11b.
- the first insulator detent portion 11a is formed so as to surround the outer surface of the base accommodating portion 133a in the insulator 133. Therefore, when a rotational force in the XY plane is applied to the insulator 133, the outer surface of the pedestal accommodating portion 133a comes into contact with the inner surface of the first insulator detent portion 11a. Can be suppressed.
- the second insulator detent portion 11b is formed to extend in the Y-axis direction substantially at the center of the first insulator detent portion 11a.
- One protrusion 133e in the insulator 133 is in contact with one end surface in the Y-axis direction of the second insulator detent part 11b, and the other protrusion 133e is in the second insulator detent part 11b. It is in contact with the other end surface in the Y-axis direction. Therefore, when a rotational force in the XY plane is applied to the insulator 133, the outer surface of the protrusion 133e comes into contact with the inner surface of the second insulator detent portion 11b. The rotation of the body 133 can be suppressed.
- the first insulator detent portion 11 a is formed by recessing a part of the lid body 11 toward the inner side of the battery case 10. Thereby, since the terminal bolt (positive electrode) 13 is disposed in a region closer to the battery case 10, the vehicle battery 1 can be downsized in the Z-axis direction.
- the lid 11 has a lid insertion hole 11c.
- the lid insertion hole 11c is provided at a position overlapping the insulator opening 133c of the insulator 133 when viewed in the Z-axis direction.
- a gasket (second gasket) 134 is interposed between the lid 11 and the current collecting terminal (positive electrode) 131.
- a peripheral wall 134 b surrounding the rivet support portion 131 b of the current collecting terminal (positive electrode) 131 is formed on the outer periphery of the gasket 134.
- the gasket 134 is made of an insulating material.
- the insulating material may be rubber or resin.
- the gasket 134 is formed with a gasket opening 134 a that is in close contact with the rivet portion 131 a formed on the current collecting terminal (positive electrode) 131. The tightness of the battery case 10 can be enhanced by the rivet portion 131a being in close contact with the gasket opening 134a.
- the rivet portion 131 a passes through the gasket opening 134 a, the lid insertion hole 11 c, the insulator opening 133 c, and the crimping hole 132 b 1 and expands in the radial direction at the terminal fixing surface 132 b. So that it is caulked.
- the terminal bolt (positive electrode) 13 the insulator 133, the current collecting terminal (positive electrode) 131, and the power generation element 12 are integrated.
- the structure of the terminal on the negative electrode side may be the same as or different from that on the positive electrode side.
- FIGS. 4 and 5 are enlarged views in which the thin portion of the connecting member (positive electrode) and the vicinity thereof are enlarged.
- FIG. 4 shows a state before an external force is applied in the axial direction of the terminal bolt (positive electrode).
- FIG. 6 is a cross-sectional view showing a battery of a comparative example, and corresponds to FIG. The comparative example is different from the configuration illustrated in FIG. 3 in that the thin-walled portion 132d and the convex-shaped portion 133f are omitted.
- the fastening force by the fastening nut 41 is exemplified as the external force applied in the axial direction of the terminal bolt (positive electrode) 13.
- the external force by the bus bar 40 that vibrates when the vehicle travels is also illustrated in this embodiment. The configuration is valid.
- FIG. 7 is a cross-sectional view of the connection structure of the terminal bolt (positive electrode) and the power generation element in the present embodiment, and corresponds to FIG. Elements having the same functions as those of the first embodiment are denoted by the same reference numerals.
- the present embodiment is different from the first embodiment in the portion where the thin portion 132d and the concave portion 132e are provided.
- the inclined flat plate portion 132c has a thin portion 132d.
- the thin portion 132d is configured by forming a concave portion 132e on the surface of the inclined flat plate portion 132c that faces the insulator 133. According to the configuration of the present embodiment, the same effects as those of the first embodiment can be obtained.
- FIG. 8 is a cross-sectional view of the connection structure of the terminal bolt (positive electrode) and the power generation element in the present embodiment, and corresponds to FIGS. 3 and 7. Elements having the same functions as those of the first embodiment are denoted by the same reference numerals.
- the present embodiment is different from the second embodiment in the portion where the thin portion 132d and the concave portion 132e are provided.
- a thin portion 132d is formed on terminal fastening surface 132a.
- the thin portion 132d is configured by forming a concave portion 132e on the surface of the terminal fastening surface 132a that faces the insulator 133. According to the configuration of the present embodiment, the same effects as those of the first embodiment can be obtained.
- terminal fastening surface 132 a and base portion 13 a of terminal bolt (positive electrode) 13 overlap in the Z-axis direction. A larger load is applied to the surface 132a. Therefore, when the thin portion 132d is formed on the terminal fastening surface 132a, the terminal fastening surface 132a may be buckled by the fastening force of the fastening nut 41. According to the structure of Embodiment 1, since the thin part 132d is formed with respect to the terminal fixing surface 132b which is not contact
- the thin portion 132d is preferably formed at a boundary portion between the terminal fixing surface 132b and the inclined flat plate portion 132c. Accordingly, it is possible to reduce the pushing force applied to the rivet portion 131a as compared with the configuration in which the thin portion 132d is provided in a region close to the rivet portion 131a.
- the concave portion 132e is formed on the outer surface of the connection member (positive electrode) 132 that faces the insulator 133.
- the present invention is not limited to this.
- the recessed portion 132e may be provided on the upper surface of the terminal fixing surface 132b (see FIG. 9), the upper surface of the inclined flat plate portion 132c (see FIG. 10), and the upper surface of the terminal fastening surface 132a (see FIG. 11).
- the concave portion 132e is provided on the upper surface of the terminal fastening surface 132a, the contact area (conductive area) between the bus bar 40 and the terminal fastening surface 132a is reduced.
- the contact area between the bus bar 40 and the terminal fastening surface 132a can be increased compared to the configuration provided on the upper surface. .
- connection member (positive electrode) 132 is formed in a stepped shape, but the present invention is not limited to this, and may have other shapes.
- the other shape may be a straight connection member (positive electrode) 132 as shown in FIG.
- a thin portion 132d and a concave portion 132e are formed in any part of the connection member (positive electrode) 132.
- the thin portion 132d and the recessed portion 132e may be provided at a position different from the base portion 13a of the terminal bolt (positive electrode) 13 in the Y-axis direction.
- the said other structure may be the structure which has arrange
- the terminal fastening surface 132a and the terminal fixing surface 132b have regions overlapping each other in the horizontal direction.
- the present invention is not limited to this, and as shown in FIG. 13, the terminal fastening surface 132a.
- the terminal fixing surface 132b may have a shape that does not overlap in the horizontal direction.
- FIG. 14 is a cross-sectional view of the connection structure of the terminal bolt (positive electrode) and the power generation element according to the modified example 4, and the same reference numerals are given to components having the same functions as those of the above embodiment. A description will be given centering on differences from the above embodiment.
- the terminal bolt (positive electrode) 13 according to the second modification is provided at a position farther from the center of the vehicle battery 1 than the rivet portion 131a.
- the upper end portion of the rivet portion 131 a is crimped to the upper surface of the terminal fixing surface 132 b, and the lower end portion of the rivet portion 131 a is crimped to the current collecting terminal (positive electrode) 131.
- a gasket 134 is interposed between the current collecting terminal (positive electrode) 131 and the lid 11.
- the thin portion 132d and the concave portion 132e can be formed in the same portion as the above embodiment and the modification.
- the present invention can also be applied to a battery in which the connection structure for connecting the connection terminal 132 and the power generation element 12 is different from that of the above embodiment.
- the vehicle battery 1 has been described.
- the present invention is not limited to this and can be used for other purposes.
- the other application may be a power tool that vibrates during operation.
- the electric tool may be a lawn mower or a chainsaw. That is, the battery of the present invention can be suitably mounted not only on a vehicle but also on various mounted devices that cause vibration when operating a lawnmower, a chain saw, or the like.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
図1は、本実施形態に係る車両用電池1の断面図であり、X軸、Y軸、Z軸は互いに異なる直交する三軸である。なお、図1では、図面を簡略化するために、一部の要素の符合を省略している。車両用電池1は、非水電解質二次電池である。本実施形態では、車両用電池として非水電解質二次電池を用いたが、ニッケル水素電池等であってもよい。車両用電池1は、電池ケース10、蓋体11、発電要素12、端子ボルト(正極)13及び端子ボルト(負極)14を含む。発電要素12は、電池ケース10の内部に電解液とともに収容されている。
図7は、本実施形態における端子ボルト(正極)及び発電要素の接続構造の断面図であり、図3に対応している。実施形態1の要素と同一の機能を有する要素には同一符合を付している。本実施形態は、薄肉部132d及び凹形状部132eの設けられる部位が実施形態1と異なる。図7を参照して、傾斜平板部132cには、薄肉部132dが形成されている。薄肉部132dは、傾斜平板部132cの絶縁体133と向きあう面に凹形状部132eを形成することにより構成されている。本実施形態の構成によれば、実施形態1と同様の効果を得ることができる。
図8は、本実施形態における端子ボルト(正極)及び発電要素の接続構造の断面図であり、図3及び図7に対応している。実施形態1の要素と同一の機能を有する要素には同一符合を付している。本実施形態は、薄肉部132d及び凹形状部132eの設けられる部位が実施形態2と異なる。図8を参照して、端子締結面132aには、薄肉部132dが形成されている。薄肉部132dは、端子締結面132aの絶縁体133と向きあう面に凹形状部132eを形成することにより構成されている。本実施形態の構成によれば、実施形態1と同様の効果を得ることができる。
上述の実施形態では、接続部材(正極)132の外面のうち絶縁体133と向きあう面に凹形状部132eを形成したが、本発明はこれに限られるものではない。例えば、凹形状部132eは、端子固定面132bの上面(図9参照)、傾斜平板部132cの上面(図10参照)、端子締結面132aの上面(図11参照)に設けられてもよい。ただし、凹形状部132eが端子締結面132aの上面に設けられた場合、バスバー40及び端子締結面132aの接触面積(導電面積)が減少する。実施形態3の構成によれば、凹形状部132eが端子締結面132aの下面に設けられるため、上面に設けられる構成と比べて、バスバー40及び端子締結面132aの接触面積を増大させることができる。
上述の実施形態では、接続部材(正極)132の形状を段差形状に形成したが、本発明はこれに限られるものではなく、他の形状であってもよい。当該他の形状は、図12に図示するように、ストレート形状の接続部材(正極)132であってもよい。この場合、接続部材(正極)132のいずれかの部位に薄肉部132d及び凹形状部132eが形成される。薄肉部132d及び凹形状部132eは、Y軸方向において端子ボルト(正極)13の台座部13aと異なる位置に設けられるとよい。端子ボルト(正極)13の台座部13aから加わる外力を避けた位置に薄肉部132d及び凹形状部132eが形成されることにより、接続部材(正極)132の剛性が低下するのを抑制できる。なお、当該他の構成は、傾斜平板部132cを、端子締結面132a及び端子固定面132bに対して垂直方向に配置した構成であってもよい。
上述の実施形態では、端子締結面132a及び端子固定面132bが、水平方向において互いに重なる領域を有するが、本発明はこれに限られるものではなく、図13に図示するように、端子締結面132a及び端子固定面132bが水平方向において重ならない形状であってもよい。
図14は、変形例4に係る端子ボルト(正極)及び発電要素の接続構造の断面図であり、上記実施形態と同一の機能を有する構成要素には同一符合を付している。上記実施形態と異なる部分を中心に説明する。同図を参照して、本変形例2に係る端子ボルト(正極)13は、リベット部131aよりも車両用電池1の中心から離間した位置に設けられている。リベット部131aの上端部は端子固定面132bの上面にカシメられており、リベット部131aの下端部は集電端子(正極)131にカシメられている。集電端子(正極)131と蓋体11との間には、ガスケット134が介在している。薄肉部132d及び凹形状部132eは、上記実施形態及び変形例と同様の部位に形成することができる。このように、接続端子132及び発電要素12を接続する接続構造が、上記実施形態と異なる電池に対しても本発明は適用することができる。
上述の実施形態では、車両用電池1について説明したが、本発明はこれに限られるものではなく、他の用途に用いることもできる。当該他の用途は、作動時に振動する電動工具であってもよい。当該電動工具は、芝刈り機、チェーンソーであってもよい。つまり、本発明の電池は、車両のみならず、芝刈り機、チェーンソーなどの作動時に振動を伴う様々な搭載機器に好適に搭載することができる。
11a 第1の絶縁体回り止め部 11b 第2の絶縁体回り止め部 12 発電要素 13 端子ボルト(正極) 13a 台座部
13b 突状部 14 端子ボルト(負極)
131 集電端子(正極) 131a リベット部
131b リベット支持部 132 接続部材(正極)
132a 端子締結面 132a1 端子挿通孔部
132b 端子固定面 132c 傾斜平板部
132b1 カシメ孔部 132d 薄肉部 132e 凹形状部
133 絶縁体 133a 台座収容部
133b 端子支持部 133c 絶縁体開口部
133d 外壁部 133e 突部
134 ガスケット 134a ガスケット開口部
134b 周壁
Claims (11)
- 発電要素を収容する有底筒状のケースと、
前記ケースの蓋体と、
前記ケースの外部に設けられ、前記蓋体の厚み方向に延びる端子電極と、
前記蓋体を貫通し、前記発電要素の電力を前記ケースの外部に取り出すための取り出し電極であって、前記蓋体を含む面内において前記端子電極と異なる位置に配置される、前記取り出し電極と、
前記端子電極と前記取り出し電極とを接続する接続部材であって、前記端子電極が前記蓋体の厚み方向に外力を受けた際に、この外力に応じた該接続部材の屈曲を許容する薄肉部を備える前記接続部材と、
を有することを特徴とする電池。 - 前記接続部材は、前記端子電極が接続される第1の平板部と、この第1の平板部とは異なる高さに位置し、前記取り出し電極が接続される第2の平板部とを有する段差形状に形成されており、
前記薄肉部は、前記第2の平板部に形成されていることを特徴とする請求項1に記載の電池。 - 前記薄肉部は、前記端子電極が延びる方向における前記第2の平板部の端面のうち、前記蓋体に近接する側の端面に凹形状部を形成することにより構成されていることを特徴とする請求項2に記載の電池。
- 前記第2の平板部と前記蓋体との間には、インシュレータが挟まれており、
前記インシュレータは、前記凹形状部内に延出する凸形状部を有し、前記凹形状部と前記凸形状部との間にはクリアランスが形成されていることを特徴とする請求項3に記載の電池。 - 前記接続部材は、前記第1の平板部と前記第2の平板部とを繋ぐ傾斜平板部を有し、
前記薄肉部は、前記第2の平板部における前記傾斜平板部との境界部分に形成されていることを特徴とする請求項2乃至4のうちいずれか一つに記載の電池。 - 前記端子電極には、バスバーが挿通されており、
前記端子電極の外面には、前記バスバーを固定するためのナットが締結されることを特徴とする請求項1乃至5のうちいずれか一つに記載の電池。 - 銅からなる負極端子電極と、
アルミニウムからなる正極端子電極と、を有し、
前記凹形状部は、前記正極端子電極及び前記負極端子電極のうち前記正極端子電極のみに形成されていることを特徴とする請求項1乃至6のうちいずれか一つに記載の電池。 - 請求項1乃至7のうちいずれか一つの電池を複数接続した組電池。
- 前記組電池は、車両を走行させるモータに駆動電力を供給する電源であることを特徴とする請求項8に記載の組電池。
- 前記組電池は、電動工具を駆動するための電源であることを特徴とする請求項8に記載の組電池。
- 請求項8に記載の組電池を搭載した搭載機器。
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EP11871451.8A EP2752919B1 (en) | 2011-08-30 | 2011-08-30 | Battery, assembled battery, and mounting device |
US14/241,260 US9722219B2 (en) | 2011-08-30 | 2011-08-30 | Battery, assembled battery, and mounting device |
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JP2019153466A (ja) * | 2018-03-02 | 2019-09-12 | トヨタ自動車株式会社 | 電池の製造方法および電池 |
JP7001957B2 (ja) | 2018-03-02 | 2022-01-20 | トヨタ自動車株式会社 | 電池の製造方法および電池 |
JP2023517820A (ja) * | 2021-02-10 | 2023-04-27 | 寧徳時代新能源科技股▲分▼有限公司 | 電池セル、電池、電力消費機器、電池セルの製造機器及び方法 |
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EP2752919A1 (en) | 2014-07-09 |
JP5673832B2 (ja) | 2015-02-18 |
US20150017501A1 (en) | 2015-01-15 |
JPWO2013030880A1 (ja) | 2015-03-23 |
CN103891010B (zh) | 2016-06-22 |
CN103891010A (zh) | 2014-06-25 |
EP2752919A4 (en) | 2015-04-22 |
EP2752919B1 (en) | 2017-03-08 |
US9722219B2 (en) | 2017-08-01 |
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