WO2013046322A1 - 電池 - Google Patents
電池 Download PDFInfo
- Publication number
- WO2013046322A1 WO2013046322A1 PCT/JP2011/072012 JP2011072012W WO2013046322A1 WO 2013046322 A1 WO2013046322 A1 WO 2013046322A1 JP 2011072012 W JP2011072012 W JP 2011072012W WO 2013046322 A1 WO2013046322 A1 WO 2013046322A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- case
- hole
- edge
- rivet
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims description 83
- 229920005992 thermoplastic resin Polymers 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims 1
- 229920002725 thermoplastic elastomer Polymers 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 18
- 238000006073 displacement reaction Methods 0.000 description 13
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- 239000011162 core material Substances 0.000 description 9
- 239000011888 foil Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000007773 negative electrode material Substances 0.000 description 4
- 239000007774 positive electrode material Substances 0.000 description 4
- 229920002943 EPDM rubber Polymers 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000002788 crimping Methods 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- -1 specifically Polymers 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000002562 thickening agent 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/691—Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
-
- 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
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/191—Inorganic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
- H01M50/645—Plugs
-
- 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 battery including a battery case having a through hole, and the through hole of the battery case is hermetically sealed using a rivet and a gasket.
- Patent Document 1 discloses a sealed battery in which a sealing material is interposed between an engagement rod of a sealing member and a peripheral outer surface of a liquid injection hole (through hole), and a blind rivet is used as a sealing member. It is disclosed.
- the lid of the battery case has a stepped bowl shape having a step portion and a large-diameter connecting tube portion around the bottom surface, and a liquid injection hole is formed.
- the bottom was lower than the surrounding area.
- the state of the sealing material sandwiched between the engaging rivet of the blind rivet and the outer peripheral surface of the liquid injection hole cannot be properly grasped from the outside (side surface direction) of the battery case.
- the lid of the battery case has a flat shape, when the opening of the case body is sealed with the lid by welding or the like, the joint between the case body and the lid has a height, After all, it was difficult to properly grasp the state of the sealing material from the outside (side surface direction) of the battery case. Therefore, there is a problem that even if the holding of the blind rivet is insufficient or excessive, it cannot be determined from the outside of the battery case.
- the present invention has been made in view of the present situation, and an object of the present invention is to provide a battery capable of grasping the state of a gasket sealing a through hole of a battery case from the outside of the battery case.
- mode has an opening, the case main body member containing the opening edge part which makes
- a self-periphery part is provided in the said opening edge part of the said case main body member
- a battery case made of a case lid member that is sealed to seal the opening, a shaft portion inserted through the through-hole, and an outer diameter larger than the shaft portion that is connected to the shaft portion outside the battery case.
- the case lid member that has a flange and includes a rivet that engages with the through-hole, and an annular gasket made of a thermoplastic resin or a rubber-like elastic body, and faces the outside of the battery case
- the case lid member is In a state where the edge portion is coupled to the opening edge portion of the case main body member, the outer peripheral surface of the case is more outward in the axial direction facing the outer side along the axis of the through hole than the peripheral edge portion and the opening edge portion.
- This battery has a through hole in the case lid member, and an outer peripheral surface of the outer periphery of the case lid member facing the outside of the battery case, which is positioned at the peripheral edge of the through hole, and an outer casing of a rivet that engages with the through hole.
- a through-hole is hermetically sealed by interposing a gasket in close contact with each other.
- the case lid member has its peripheral outer surface more axial than the peripheral edge of the case body member and the opening edge of the case body member in a state where the peripheral edge of the case lid member is coupled to the opening edge of the case body member. It has a form located in the outward direction.
- the rivet used for sealing includes the blind rivet described in Patent Document 1.
- Examples of the material of the gasket include thermoplastic resins such as PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer) and rubber-like elastic bodies such as EPDM (ethylene propylene diene rubber).
- the peripheral outer surface and the outer flange portion Among the outer peripheral surfaces of the gasket in a state of being interposed between the outer peripheral surfaces of the gasket, the position where the outer surface side edge, which is the edge in contact with the outer peripheral surface of the gasket, can be visually recognized as the first position,
- the battery case is observed radially outward from a position in the axially outer side of the first position and radially inward of the axial line at the same angular position in the circumferential direction of the first position and the axial line.
- the outer flange portion side edge which is an edge contacting the outer flange portion, can be visually recognized.
- the case body member and the housing lid member of the battery case, as well, the outer flange portion of the rivet may be a battery comprised is the form in which the first position and the second position is present.
- the outer surface side edge of the gasket can be visually recognized.
- the case body member and the case lid member of the battery case, and the outer flange portion of the rivet are configured. Furthermore, from the second position, which is located on the radially outer side of the axial line than the battery case, at the same angular position in the circumferential direction of the first position and the axial line, and toward the radially inner side of the axial line from the second position located on the axially outer side of the first position. When the battery case is observed, the outer edge portion side edge of the gasket is visible.
- this battery is configured in such a form, it is affected by, for example, the presence of the opening edge of the case main body member and the rise of the melted portion at the joint portion between the case main body member and the case lid member.
- the position in the axial direction of the outer flange side edge and the outer surface side edge, or the positional relationship between the two can be appropriately detected from the outside of the battery case.
- the thickness of the gasket in a state of being interposed between the outer peripheral surface of the case lid member and the outer flange portion of the rivet, that is, the compressed state of the gasket can be easily confirmed.
- a battery that can be easily checked for suitability is obtained.
- the peripheral portion of the case lid member The outer part of the outer peripheral surface including the outer peripheral surface, and the axial position of the opening edge portion of the case body member at least at any angular position in the circumferential direction of the axial line of the through hole, than the peripheral outer surface, It is located in the direction opposite to the axial outer direction (axial inner direction).
- other members such as terminal members are not installed or installed at the aforementioned angular positions in the intermediate portion located between the outer peripheral surface and the peripheral portion of the case lid member. Even if there exists, the form which made the axial direction position located in the axial inner side direction rather than the peripheral outer surface of a case cover member is mentioned.
- the outer flange part of the rivet is formed in the same diameter as the outer flange part side edge of the gasket over the entire circumference, or on the entire circumference or a part of the outer flange part.
- the gasket has a portion located on the outer side in the radial direction from the outer edge of the outer flange portion side of the gasket. It is done.
- the outer peripheral surface of the case lid member is a flat surface orthogonal to the axis
- the outer casing of the outer flange portion of the rivet that faces the outer peripheral surface of the rivet.
- the inner surface of the part includes an abutting part that abuts on the gasket, and at least the abutting part of the inner surface of the outer casing part is preferably a battery that is a flat surface orthogonal to the axis.
- the outer flange portion of the rivet has a portion radially outward from the outer flange portion side edge of the gasket over the entire periphery, and from the outer flange portion side edge. Also, it is preferable that the battery is configured to be positioned in the axially outward direction.
- FIG. 1 is a longitudinal sectional view showing a lithium ion secondary battery according to Embodiment 1.
- FIG. FIG. 3 is a longitudinal sectional view showing a through-hole sealing structure according to the first embodiment when viewed from a direction rotated by 90 ° from FIG. 1 about the axis of the through-hole. It is a longitudinal cross-sectional view which concerns on Embodiment 1 and shows the detail of the sealing structure of the through-hole by the deformed blind rivet. It is a longitudinal cross-sectional view which concerns on Embodiment 1 and shows the state which penetrated the undeformed blind rivet in the through-hole. It is a longitudinal cross-sectional view which concerns on Embodiment 1 and shows the state before insertion of the undeformed blind rivet in a through-hole.
- FIG. 6 is an explanatory diagram showing a hybrid vehicle according to a second embodiment. It is explanatory drawing which shows the hammer drill which concerns on Embodiment 3.
- FIG. 6 is an explanatory diagram showing a hybrid vehicle according to a second embodiment. It is explanatory drawing which shows the hammer drill which concerns on Embodiment 3.
- FIG. 1 shows a longitudinal sectional view of a lithium ion secondary battery (sealed battery) 1 (hereinafter also simply referred to as battery 1) according to the first embodiment.
- FIG. 2 is a longitudinal sectional view showing the sealing structure of the through hole 12H viewed from a direction rotated 90 ° from FIG. 1 around the axis AX of the through hole 12H.
- FIG. 3 shows details of the sealing structure of the through hole 12H by the deformed blind rivet 60.
- the upper side in FIGS. 1, 2, and 3 is described as the upper side UW of the battery 1
- the lower side is described as the lower side DW of the battery 1.
- the outer side direction HO is 1 in the same direction as the upper UW.
- the battery 1 is a prismatic battery mounted on a vehicle such as a hybrid car or an electric car, or a battery-powered device such as a hammer drill.
- the battery 1 includes a rectangular parallelepiped battery case 10, a wound electrode body 20 accommodated in the battery case 10, a positive terminal 40 and a negative terminal 41 supported by the battery case 10 ( (See FIG. 1). Further, a non-aqueous electrolyte solution 17 is held in the battery case 10.
- the battery case 10 is formed of metal (aluminum in the first embodiment).
- the battery case 10 includes a rectangular parallelepiped box-shaped case main body member 11 in which only the upper UW is opened, and a case lid member 12 welded in a form for closing the opening 11H of the case main body member 11.
- the case main body member 11 includes an opening edge portion 11f that forms an opening 11H, and the peripheral edge portion 12r of the case lid member 12 is joined to the opening edge portion 11f of the case main body member 11 by welding at the joint portion 11J. 11H is sealed (see FIG. 2).
- the case lid member 12 has an outer surface 13 facing the outside of the battery case 10 and an inner surface 14 facing the inside of the battery case 10.
- the case lid member 12 is provided with a safety valve 15 that is broken when the internal pressure of the battery case 10 reaches a predetermined pressure. Further, the case lid member 12 is provided with a through hole 12H (a liquid injection hole) that penetrates the case lid member 12 itself. As will be described later, the through hole 12H is hermetically sealed by a deformed blind rivet 60 and a gasket 70. Further, of the outer surface 13 of the case lid member 12, if the peripheral edge of the through hole 12 ⁇ / b> H is the peripheral outer surface 13 c, the case lid member 12 connects its peripheral edge portion 12 r to the opening edge portion 11 f of the case main body member 11.
- the peripheral outer surface 13c has a form positioned in the axially outer direction HO with respect to the peripheral edge 12r and the opening edge 11f (see FIG. 2).
- the peripheral outer surface 13c in which the through-hole 12H is formed has a columnar shape from the peripheral portion 12r of the case lid member 12 toward the axial outer side direction HO (upper UW of the battery 1). It protrudes.
- the case lid member 12 is fixedly provided with a positive electrode terminal 40 and a negative electrode terminal 41 each formed of an extended terminal member 42 and a bolt 43 via an insulating member 44 made of resin (see FIG. 1). .
- the positive electrode terminal 40 is connected to the positive electrode plate 21 (the positive electrode current collector 21 m) of the electrode body 20, and the negative electrode terminal 41 is connected to the negative electrode plate 31 (the negative electrode current collector 31 m) of the electrode body 20.
- the positive electrode terminal 40 is connected to the positive electrode plate 21 (the positive electrode current collector 21 m) of the electrode body 20
- the negative electrode terminal 41 is connected to the negative electrode plate 31 (the negative electrode current collector 31 m) of the electrode body 20.
- the electrode body 20 is accommodated in the insulating film enclosure 16 formed in a bag shape in which only the upper UW is opened, and is accommodated in the battery case 10 in a laid state.
- This electrode body 20 is obtained by winding a belt-like positive electrode plate 21 and a belt-like negative electrode plate 31 on each other via a belt-like separator 34 and compressing them in a flat shape.
- the positive electrode plate 21 has a positive electrode current collector foil 22 made of a strip-shaped aluminum foil as a core material.
- a positive electrode active material layer 23 is provided in a strip shape on a region extending in the longitudinal direction in a part of the width direction of both main surfaces of the positive electrode current collector foil 22.
- the positive electrode active material layer 23 is formed of a positive electrode active material, a conductive agent, and a binder.
- one end in the width direction of the positive electrode current collector foil 22 is a positive electrode current collector part 21m in which the positive electrode active material layer 23 does not exist in the thickness direction of the positive electrode current collector foil 22, The positive electrode terminal 40 is connected.
- the negative electrode plate 31 has a negative electrode current collector foil 32 made of a strip-shaped copper foil as a core material. On both main surfaces of the negative electrode current collector foil 32, a negative electrode active material layer 33 is provided in a band shape on a region extending in the longitudinal direction and part of the width direction.
- the negative electrode active material layer 33 is formed of a negative electrode active material, a binder, and a thickener.
- one end in the width direction of the negative electrode current collector foil 32 is a negative electrode current collector 31m in which the negative electrode active material layer 33 does not exist in the thickness direction of the negative electrode current collector foil 32.
- the negative electrode terminal 41 is connected.
- the separator 34 is a porous film made of resin, specifically, polypropylene (PP) and polyethylene (PE), and has a strip shape.
- the case lid member 12 is provided with a through hole 12H (a liquid injection hole) that penetrates the case lid member 12 itself.
- the through hole 12H is hermetically sealed by a deformed blind rivet 60 (hereinafter also simply referred to as a rivet 60) and a gasket 70.
- the deformed blind rivet 60 includes a deformed rivet body 61 having a substantially bottomed cylindrical shape, and a broken shaft portion 65 having an inverted T-shaped cross section surrounded by the main body 61 (an enlarged diameter portion 56 and a core of an undeformed blind rivet 50 described later). (See FIG. 3).
- the deformed rivet main body 61 includes a shaft portion 63, an outer flange portion 52, and a deformation caulking portion 64.
- the shaft portion 63 is cylindrical and is inserted into the through hole 12H.
- the direction from the outer flange portion 52 to the shaft portion 63 is defined as the front end side HS. Is the base end side HK (the same applies to the subsequent drawings).
- the outer flange portion 52 of the deformed rivet body 61 is connected to the base end side HK of the shaft portion 63 (in FIG.
- the upper side UW of the battery 1 and the axially outer direction HO is larger in diameter than the shaft portion 63 and has a case lid member.
- a peripheral outer surface 13 c that is a peripheral edge of the through hole 12 ⁇ / b> H is caulked through a rivet 70.
- the deformed crimping portion 64 is connected to the tip end HS of the shaft portion 63 and is deformed to have a larger diameter than the shaft portion 63, and the peripheral inner surface 14 c that is the peripheral edge of the through hole 12 H in the inner surface 14 of the case lid member 12. Is caulking.
- an annular gasket 70 made of thermoplastic resin (specifically, PFA) is provided between the outer peripheral surface 13c of the case lid member 12 and the outer flange portion 52 of the rivet 60 (deformed rivet body 61). It is interposed and is in close contact with them.
- the through hole 12H of the battery case 10 is hermetically sealed by the rivet 60 and the gasket 70.
- the deformed blind rivet 60 is obtained by deforming a part of an undeformed blind rivet 50 described later and sealing the through hole 12H.
- the gasket 70 may be a rubber-like elastic body (specifically, EPDM).
- the boundary contacting the outer flange portion 52 is defined as the outer flange portion side edge 70ra.
- the battery 1 has an axial line on the radially outer side RO of the axial line AX of the through hole 12H rather than the battery case 10, as shown in FIGS.
- the outer surface side edge 70rb is Visible.
- first position P1 (for example, in the first embodiment, the left direction in the left-right direction in FIG. 2)
- outer side RO of the axis AX of the through-hole 12H than the battery case 10 at the same angular position (for example, in the first embodiment, leftward in FIG. 2) in the circumferential direction HR of the first position P1 and the axis AX,
- the outer flange portion side edge 70ra is also visible.
- the case main body member 11 and the case lid member 12 of the battery case 10 and the outer flange portion 52 of the rivet 60 are thus arranged such that the outer surface side edge 70rb and the outer flange portion side edge 70ra are in the radial direction of the axis AX. It is comprised in the form which can be visually recognized from the outer side RO.
- the outer peripheral surface 13c of the case lid member 12 is a flat surface orthogonal to the axis AX of the through hole 12H.
- the outer flange portion 52 of the rivet 60 has a portion located on the radially outer side RO from the outer flange portion side edge 70ra of the gasket 70.
- the outer flange inner surface 52c (including the contact portion 52ct that contacts the gasket 70) facing the peripheral outer surface 13c is flat as a whole and orthogonal to the axis AX. It has a surface.
- the separately formed belt-like positive electrode plate 21 and negative electrode plate 31 are overlapped with each other via a belt-like separator 34 and wound using a winding core. Thereafter, the electrode body 20 is formed by compressing it into a flat shape.
- the negative terminal 41 is fixed.
- the positive electrode terminal 40 and the positive electrode current collector 21m of the electrode body 20 are connected (welded). Further, the negative electrode terminal 41 and the negative electrode current collector 31m of the electrode body 20 are connected (welded). Thereafter, the electrode body 20 is accommodated in the case body member 11 via the insulating film enclosure 16, and the opening 11 ⁇ / b> H of the case body member 11 is closed with the case lid member 12. Then, the case body member 11 and the case lid member 12 are welded by laser welding to form the battery case 10 (see FIG. 1).
- the above-mentioned battery is put in a vacuum chamber, and the inside of the vacuum chamber is depressurized. Then, a liquid injection nozzle is inserted into the through hole 12H under reduced pressure, and the electrolytic solution 17 is injected into the battery case 10 from the liquid injection nozzle.
- the undeformed blind rivet 50 includes an undeformed rivet body 51 having a bottomed cylindrical shape at the front end HS (downward in FIGS. 4 and 5) and the undeformed rivet body 51. And a rod-shaped (undeformed) shaft portion 55 arranged in the shape.
- the undeformed rivet body 51 made of aluminum has a bottomed cylindrical shape with a closed front end HS, and a cylindrical portion 53 inserted into the through-hole 12H, and a proximal end side HK of the cylindrical portion 53 (see FIG.
- the cylindrical distal end portion 53s of the distal end side HS is formed so that the inner diameter is larger (thinner) than the proximal end side HK. For this reason, a stepped portion 53d is formed in the cylindrical portion 53 due to a change in thickness.
- the undeformed shaft portion 55 is made of stainless steel, and the tip end portion 55s of the tip side HS (downward in FIGS. 4 and 5) is disposed in the cylindrical portion 53 of the undeformed rivet body 51. Yes.
- the distal end portion of the shaft distal end portion 55 s has an enlarged diameter portion 56 that is enlarged in diameter so as to be engageable with the stepped portion 53 d within the cylindrical distal end portion 53 s of the cylindrical portion 53.
- the shaft portion 55 includes, in addition to the enlarged diameter portion 56, a core shaft portion 57, a planned fracture portion 58, in order from the enlarged diameter portion 56 to the base end side HK (upward in FIGS. 4 and 5).
- An operation rod portion 59 is provided.
- the core shaft portion 57 is cylindrical and has a smaller diameter than the enlarged diameter portion 56. Further, the planned fracture portion 58 has a smaller diameter than the core shaft portion 57.
- the operation rod portion 59 has a cylindrical shape with the same diameter as the core shaft portion 57 and extends to the outside of the undeformed rivet body 51.
- a separately prepared gasket 70 is disposed on the outer peripheral surface 13c of the case lid member 12 (see FIG. 5).
- the cylindrical portion 53 of the undeformed blind rivet 50 is inserted into the through hole 12H of the case lid member 12 until the outer flange portion 52 abuts on the gasket 70 disposed on the outer peripheral surface 13c of the case lid member 12. (See FIG. 4).
- the operation of the shaft portion 55 is performed in a state where the outer flange portion 52 of the undeformed rivet body 51 is pressed against the outer surface 13 of the case lid member 12 among the undeformed blind rivets 50 inserted through the through holes 12H.
- the rod part 59 is pulled up to the base end side HK (upper UW in FIG. 4).
- the enlarged diameter portion 56 of the shaft portion 55 engages with a step portion 53 d formed in the cylindrical portion 53 of the undeformed rivet body 51.
- the portion of the cylindrical portion 53 that is closer to the base end HK than the stepped portion 53d and to the tip end HS from the through hole 12H is buckled, and is pushed outward in the radial direction.
- the cylindrical portion 53 is connected to the cylindrical shaft portion 63 inserted into the through hole 12H and the distal end side HS of the shaft portion 63, and is in close contact with the inner peripheral surface 14c of the case lid member 12 so that the shaft portion is Deformation into a deformed crimping portion 64 having a diameter larger than 63.
- the deformation caulking portion 64 caulks the peripheral inner surface 14c, which is the peripheral edge of the through hole 12H, of the inner surface 14 of the case lid member 12.
- the outer flange portion 52 is not deformed, and the outer peripheral surface 13 c that is the peripheral edge of the through hole 12 ⁇ / b> H in the outer surface 13 of the case lid member 12 is crimped via the gasket 70.
- the undeformed rivet body 51 becomes a deformed rivet body 61 including the outer flange portion 52, the shaft portion 63, and the deformed caulking portion 64.
- the operating rod portion 59 is further pulled up, and the shaft portion 55 is broken at the planned breaking portion 58.
- the shaft portion 65 including the enlarged diameter portion 56 and the core shaft portion 57 is left in the deformed rivet body 61 (the operation rod portion 59 is removed).
- the undeformed blind rivet 50 becomes the deformed blind rivet 60 having the deformed rivet body 61 and the broken shaft portion 65 as shown in FIG. 3, and the through hole 12H is hermetically sealed.
- the inside of the vacuum chamber is returned to the atmospheric pressure, and the battery 1 that has been sealed is taken out from the vacuum chamber.
- the battery case 10 of the battery 1 is sealed in a state where the inside is depressurized from the atmospheric pressure.
- the case lid member 12 has the peripheral outer surface 13c connected to the opening edge portion 11f of the case main body member 11 (welded) with the peripheral edge surface 12c and the opening edge portion. It has the form located in the axial direction outer side HO rather than 11f. Further, when the radially inner RI of the axis AX is viewed from the first position P1 and the second position P2 of the radially outer RO of the axis AX of the through hole 12H than the battery case 10, the outer surface side edge 70rb and the outer The case main body member 11 and the case lid member 12 of the battery case 10 and the outer flange portion 52 of the rivet 60 are configured in a form in which the flange side edge 70ra is visible (see FIG. 2).
- the step of obtaining the thickness of the gasket 70 in a state where the through hole 12H is sealed by the rivet 60, and the thickness of the obtained gasket 70 are within a predetermined range. And a sorting process for sorting things.
- the thickness of the gasket is measured using a laser displacement meter 100 (such as LJ-G030 manufactured by Keyence). Specifically, first, any one of the circumferential direction HR of the axis AX in which the outer surface side edge 70rb and the outer flange side edge 70ra are visible at the radially outer side RO of the axis AX from the battery case 10.
- the laser displacement meter 100 is installed at the position (in the first embodiment, the left direction in FIG. 6) with the radial inner side RI of the axis AX.
- the laser displacement meter 100 is movable in the axial direction HJ while maintaining its orientation.
- FIG. 7 is a distance profile in the first embodiment.
- the horizontal axis indicates the moving time of the laser displacement meter 100
- the vertical axis indicates the distance from the laser displacement meter to the object to be measured.
- the movement time of the horizontal axis corresponds to the movement distance (position) of the laser displacement meter 100 in the axial direction HJ. Then, from the change in the distance profile, the time when the laser displacement meter 100 passes through each of the first position P1 corresponding to the outer surface side edge 70rb and the second position corresponding to the outer flange side edge 70ra. Therefore, the position PJ1 in the axial direction HJ of the first position P1 and the position PJ2 in the axial direction of the second position P2 can be detected.
- the distance in the axial direction HJ between the position PJ1 in the axial direction HJ of the first position P1 and the position PJ2 in the axial direction HJ of the second position P2 is obtained by calculation, and this is obtained as the thickness T of the gasket 70. .
- the thickness T of the obtained gasket 70 is within a predetermined range, and the batteries within the range are selected by removing batteries outside the range.
- the thickness T of the gasket 70 is measured using a laser displacement meter.
- a camera is used, and the outer surface side edge 70rb and the outer flange portion are arranged at predetermined positions of the photographed image. Images may be taken so that the side edges 70ra are positioned, and the thickness T of the gasket 70 may be obtained from the moving distance in the axial direction HJ of the camera at this time.
- the battery 1 is initially charged / discharged. Thus, the battery 1 is completed.
- the case lid member 12 has the peripheral outer surface 13c in a state where the peripheral edge portion 12r is coupled to the opening edge portion 11f of the case main body member 11.
- the outer peripheral portion 12r and the opening edge portion 11f are positioned in the axially outer direction HO. Since the battery 1 has such a configuration, the gasket that seals the through hole 12H without being obstructed by the peripheral edge portion 12r of the case lid member 12 or the opening edge portion 11f of the case main body member 11.
- the state of 70 can be grasped from the outside of the battery case 10.
- the case main body member 11 and the case lid member 12 of the battery case 10 and the outer flange portion 52 of the rivet 60 are configured in such a manner that the outer surface side edge 70rb and the outer flange portion side edge 70ra are visible.
- the battery 1 is configured in such a form, for example, the opening edge portion 11f of the case main body member 11 is present, or the melted portion (at the joint portion between the case main body member 11 and the case lid member 12 ( The position of the outer flange side edge 70ra and the outer surface side edge 70rb in the axial direction HJ or the positional relationship between the two is appropriately determined from the outside of the battery case 10 without being affected by the rise of the joint 11J). Can be detected. As a result, the thickness of the gasket 70 in a state where the through-hole 12H is sealed by the rivet 60, that is, the compression state of the gasket 70 can be easily confirmed. Therefore, the suitability of the sealing using the rivet 60 and the gasket 70 can be easily confirmed. A battery 1 is obtained.
- a convex part and a recessed part can also be provided in the contact part 52ct of the outer periphery outer surface 13c or the outer collar part inner side surface 52c, the height of a convex part or a recessed part is prescribed
- regulated strictly a dimensional tolerance is made extremely small. Therefore, even if the thickness of the gasket 70 on the outer peripheral surface 70r is set to an appropriate value, it is difficult to accurately define the thickness of the portion having the convex portion or the concave portion, and the sealing performance between the batteries is difficult. It tends to cause variation.
- the peripheral outer surface 13c of the case lid member 12 and the outer flange inner surface 52c of the rivet 60 are axial lines. It is a flat surface orthogonal to AX.
- the outer flange side edge 70ra and the outer surface side edge 70rb are visually recognized from the radial outer side RO of the axis AX than the battery case 10 and from at least one position in the circumferential direction HR of the axis AX.
- the thickness and shape of the entire gasket 70 can be detected.
- variations in sealing performance of the gasket 70 between batteries are less likely to occur.
- the outer flange portion 52 of the rivet 60 is located on the outer side of the outer flange portion side edge 70ra of the gasket 70 in the radial direction outside the outer flange portion side edge 70ra. Since the outer wall inner side surface 52c is a flat surface located in the axially outer direction HO, the rivet 60 is inserted into the through hole 12H without considering the arrangement of the rivet 60 in the circumferential direction HR of the axial line AX. Can be engaged. For this reason, the freedom degree of arrangement
- a hybrid vehicle (vehicle) 700 (hereinafter also simply referred to as a vehicle 700) according to the second embodiment is equipped with the battery 1 according to the first embodiment, and the electric energy stored in the battery 1 is used as the drive energy of the drive source. It is used as all or part (see FIG. 8).
- This automobile 700 is a hybrid automobile that is mounted with an assembled battery 710 in which a plurality of batteries 1 are combined and is driven by using an engine 740, a front motor 720, and a rear motor 730 in combination.
- the automobile 700 includes an engine 740, a front motor 720 and a rear motor 730, an assembled battery 710 (battery 1), a cable 750, and an inverter 760 on the vehicle body 790.
- the automobile 700 is configured to be able to drive the front motor 720 and the rear motor 730 using electrical energy stored in the assembled battery 710 (battery 1).
- the reliability of the automobile 700 on which the battery 1 is mounted can be increased.
- a hammer drill 800 according to the third embodiment is a battery-using device equipped with the battery 1 according to the first embodiment (see FIG. 9).
- a battery pack 810 battery 1 including the battery 1 is accommodated in the bottom 821 of the main body 820, and the battery pack 810 is used as an energy source for driving the drill.
- the reliability of the hammer drill 800 on which the battery 1 is mounted can be increased.
- the present invention has been described with reference to the embodiments.
- the present invention is not limited to the above-described first to third embodiments, and it is needless to say that the present invention can be appropriately modified and applied without departing from the gist thereof. Yes.
- the through hole 12H is used as a liquid injection hole for injecting the electrolytic solution 17
- the present invention is not limited thereto.
- the through hole include a vent hole for releasing a gas in the battery case generated during the manufacturing process (such as initial charge / discharge).
- the outer peripheral surface 13c in which the through hole 12H is formed in the case lid member 12 has a form protruding in a columnar shape from the peripheral edge portion 12r of the case lid member 12 in the axial outer direction HO.
- the form of the case lid member 12 only needs to have a form in which the peripheral outer surface 13c is positioned in the axially outer direction HO with respect to the peripheral edge part 12r of the case cover member 12 and the opening edge part 11f of the case main body member 11, It is not limited to this.
- the shape may be a truncated cone shape having a slope (conical surface) from the peripheral edge portion 12r of the case lid member 12 toward the peripheral outer surface 13c, and bulge in the axially outer direction HO.
- the hybrid vehicle 700 is exemplified as a vehicle on which the battery 1 according to the present invention is mounted.
- the present invention is not limited to this.
- Examples of the vehicle on which the battery according to the present invention is mounted include an electric vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric wheelchair, an electrically assisted bicycle, and an electric scooter.
- the hammer drill 800 was illustrated as a battery use apparatus which mounts the battery 1 which concerns on this invention, it is not restricted to this.
- Examples of battery-powered devices equipped with the battery according to the present invention include personal computers, mobile phones, battery-powered electric tools, uninterruptible power supply devices, various home appliances driven by batteries, office equipment, industrial equipment, etc. Is mentioned.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
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- Inorganic Chemistry (AREA)
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- Filling, Topping-Up Batteries (AREA)
Abstract
Description
以下、本発明の実施の形態を、図面を参照しつつ説明する。図1に、本実施形態1に係るリチウムイオン二次電池(密閉型電池)1(以下、単に電池1とも言う)の縦断面図を示す。また、図2は、貫通孔12Hの軸線AXを中心にして、図1から90°回転した方向から見た、貫通孔12Hの封止構造を示す縦断面図である。さらに、図3に、変形済みブラインドリベット60による貫通孔12Hの封止構造の詳細を示す。なお、本明細書では、図1,図2及び図3における上方を電池1の上側UW、下方を電池1の下側DWとして説明する。また、図2において、貫通孔12Hの軸線AXに沿う軸線方向のうち、電池ケース10の内側から外側に向く方向を軸線外側方向HOとすると、本実施形態1では、軸線外側方向HOは、電池1の上側UWと同一方向となる。
次いで、第2の実施の形態について説明する。本実施形態2に係るハイブリッド自動車(車両)700(以下、単に自動車700とも言う)は、実施形態1に係る電池1を搭載し、この電池1に蓄えた電気エネルギーを、駆動源の駆動エネルギーの全部または一部として使用するものである(図8参照)。
次いで、第3の実施の形態について説明する。本実施形態3のハンマードリル800は、実施形態1に係る電池1を搭載した電池使用機器である(図9参照)。このハンマードリル800は、本体820の底部821に、電池1を含むバッテリパック810(電池1)が収容されており、このバッテリパック810を、ドリルを駆動するためのエネルギー源として利用している。
10 電池ケース
11 ケース本体部材
11H 開口
11f 開口縁部
11J 接合部
12 ケース蓋部材
12r (ケース蓋部材の)周縁部
13 (ケース蓋部材の)外表面
14 (ケース蓋部材の)内表面
12H 貫通孔(注液孔)
13c 周縁外表面
14c 周縁内表面
15 安全弁
20 電極体
40 正極端子
41 負極端子
50 未変形ブラインドリベット
51 未変形リベット本体
52 外鍔部
52c 外鍔部内側面
52ct (外鍔部内側面の)当接部
53 円筒部(有底筒部)
60 変形済みブラインドリベット(リベット)
61 変形済みリベット本体
63 軸部
64 変形カシメ部
70 ガスケット
70r (ガスケットの)外周面
70ra 外鍔部側端縁
70rb 外表面側端縁
100 レーザ変位計(レーザ測距計)
T (ガスケットの)厚み
AX (貫通孔の)軸線
HJ 軸線方向
HO 軸線外側方向
RO 径方向外側
RI 径方向内側
P1 第1位置
P2 第2位置
PJ1 第1位置の軸線方向の位置
PJ2 第2位置の軸線方向の位置
Claims (4)
- 開口を有し、この開口をなす開口縁部を含むケース本体部材、及び、
自身を貫通する貫通孔を有し、上記ケース本体部材の上記開口縁部に自身の周縁部を結合させて、上記開口を封口するケース蓋部材からなる
電池ケースと、
上記貫通孔に挿通された軸部、及び、
上記電池ケースの外側で上記軸部に連なり、上記軸部より径大な外鍔部を有し、
上記貫通孔に係合するリベットと、
環状で熱可塑性樹脂又はゴム状弾性体からなるガスケットと、を備え、
上記電池ケースの外側を向く上記ケース蓋部材の外表面のうち上記貫通孔の周縁に位置する周縁外表面と上記リベットの上記外鍔部との間に、これらに密着する上記ガスケットを介在させて、上記貫通孔を気密に封止してなる
電池であって、
上記ケース蓋部材は、
自身の上記周縁部を上記ケース本体部材の上記開口縁部に結合させた状態において、上記周縁外表面が、上記周縁部及び上記開口縁部よりも、上記貫通孔の軸線に沿い外側を向く軸線外側方向に位置する形態を有する
電池。 - 請求項1に記載の電池であって、
前記電池ケースよりも前記軸線の径方向外側から、上記軸線の径方向内側に向かって、上記電池ケースを観察したとき、前記周縁外表面と前記外鍔部との間に介在した状態における前記ガスケットの外周面のうち、上記周縁外表面に接する端縁である外表面側端縁を視認しうる位置を、第1位置とし、
上記電池ケースよりも上記軸線の径方向外側で、上記第1位置と上記軸線の周方向について同じ角度位置で、上記第1位置よりも上記軸線外側方向の位置から、上記軸線の径方向内側に向かって、上記電池ケースを観察したとき、上記周縁外表面と上記外鍔部との間に介在した状態における上記ガスケットの上記外周面のうち、上記外鍔部に接する端縁である外鍔部側端縁を視認しうる位置を、第2位置としたとき、
上記電池ケースの上記ケース本体部材及び上記ケース蓋部材、並びに、上記リベットの上記外鍔部は、
上記第1位置及び上記第2位置が存在する形態とされてなる
電池。 - 請求項2に記載の電池であって、
前記ケース蓋部材の前記周縁外表面は、
前記軸線に直交する平坦な面であり、
前記リベットの前記外鍔部のうち、上記周縁外表面と対向する外鍔部内側面は、前記ガスケットに当接する当接部を含み、
上記外鍔部内側面のうち、少なくとも上記当接部は、
上記軸線に直交する平坦な面である
電池。 - 請求項2または請求項3に記載の電池であって、
前記リベットの前記外鍔部は、
前記ガスケットの前記外鍔部側端縁よりも径方向外側の部位が、全周に亘り、上記外鍔部側端縁よりも前記軸線外側方向に位置する形態とされてなる
電池。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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JP2013535680A JP5780308B2 (ja) | 2011-09-27 | 2011-09-27 | 電池 |
DE112011105667.2T DE112011105667T5 (de) | 2011-09-27 | 2011-09-27 | Batterie |
CN201180073574.6A CN103814457B (zh) | 2011-09-27 | 2011-09-27 | 电池 |
PCT/JP2011/072012 WO2013046322A1 (ja) | 2011-09-27 | 2011-09-27 | 電池 |
US14/344,627 US10014515B2 (en) | 2011-09-27 | 2011-09-27 | Battery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2011/072012 WO2013046322A1 (ja) | 2011-09-27 | 2011-09-27 | 電池 |
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WO2013046322A1 true WO2013046322A1 (ja) | 2013-04-04 |
Family
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PCT/JP2011/072012 WO2013046322A1 (ja) | 2011-09-27 | 2011-09-27 | 電池 |
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US (1) | US10014515B2 (ja) |
JP (1) | JP5780308B2 (ja) |
CN (1) | CN103814457B (ja) |
DE (1) | DE112011105667T5 (ja) |
WO (1) | WO2013046322A1 (ja) |
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Also Published As
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JP5780308B2 (ja) | 2015-09-16 |
CN103814457B (zh) | 2016-08-17 |
JPWO2013046322A1 (ja) | 2015-03-26 |
CN103814457A (zh) | 2014-05-21 |
US20150325833A1 (en) | 2015-11-12 |
DE112011105667T5 (de) | 2014-07-17 |
US10014515B2 (en) | 2018-07-03 |
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