WO2014002523A1 - 電池 - Google Patents
電池 Download PDFInfo
- Publication number
- WO2014002523A1 WO2014002523A1 PCT/JP2013/054100 JP2013054100W WO2014002523A1 WO 2014002523 A1 WO2014002523 A1 WO 2014002523A1 JP 2013054100 W JP2013054100 W JP 2013054100W WO 2014002523 A1 WO2014002523 A1 WO 2014002523A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery case
- battery
- case lid
- insulating member
- plume
- Prior art date
Links
- 238000003466 welding Methods 0.000 claims abstract description 38
- 230000000630 rising effect Effects 0.000 claims abstract description 12
- 238000010248 power generation Methods 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000009413 insulation Methods 0.000 abstract description 10
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 33
- 238000003780 insertion Methods 0.000 description 20
- 230000037431 insertion Effects 0.000 description 20
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical group 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 19
- 239000010410 layer Substances 0.000 description 18
- 239000000203 mixture Substances 0.000 description 18
- 239000011324 bead Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 13
- 239000002184 metal Substances 0.000 description 13
- 239000012212 insulator Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 238000007789 sealing Methods 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000000155 melt Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000009422 external insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- -1 nickel metal hydride Chemical class 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/206—Laser sealing
-
- 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
- H01M50/10—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
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
-
- 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a battery formed by welding a battery case lid to a battery case main body that houses a power generation element.
- batteries such as lithium ion secondary batteries have been used in various fields such as electronic devices such as mobile phones and personal computers, vehicles such as hybrid cars and electric cars.
- a lithium ion secondary battery has a high energy density and is suitable for mounting in various devices.
- a lithium ion secondary battery has a configuration in which a power generation element is accommodated in a rectangular battery case, for example.
- the power generation element has, for example, a flat shape in which a positive electrode plate having a positive electrode coating layer containing a positive electrode active material, a negative electrode plate having a negative electrode coating layer containing a negative electrode active material, and a separator for insulating them are wound.
- the battery case has an opening at the top, and includes a battery case main body that houses the power generation element therein, and a battery case lid that closes the opening of the battery case main body.
- the battery case lid is fitted into the opening of the battery case body and welded to the battery case body.
- the welding is, for example, laser welding using a CW laser, and is performed by vertical punching can welding in which laser light is irradiated from above the battery case toward the upper surface of the battery case.
- the welded portion in the battery case is a boundary portion between the battery case main body and the battery case lid formed on the upper surface of the battery case. This boundary portion is a portion formed in an annular shape inside the periphery of the upper surface of the battery case.
- the plume is a rise of evaporated metal like smoke, and is mainly composed of Ar (argon) vapor and plasma.
- Ar argon
- the plume does not shake significantly along the inside and outside of the battery case, that is, the plume rises along the boundary so that the plume rises stably from the battery case in the substantially vertical direction. Shield gas is flowing.
- electrode terminal members (a positive terminal member and a negative terminal member) that are electrically connected to the power generation element are assembled to the battery case lid.
- the positive electrode terminal member connected to the positive electrode plate of the power generation element and the negative electrode terminal member connected to the negative electrode plate of the power generation element have the same configuration.
- the electrode terminal member has element connection terminals (positive connection terminal, negative connection terminal) and external connection terminals.
- the element connection terminal (positive electrode connection terminal, negative electrode connection terminal) has an insertion portion that is inserted into a through hole formed in the battery case lid, and is electrically connected to the power generation element.
- the external connection terminal is, for example, a substantially Z-shaped Z terminal as viewed from the side along the longitudinal direction of the rectangular battery case (hereinafter simply referred to as “longitudinal direction”), and is electrically connected to the element connection terminal outside the battery case lid. To be connected.
- An insulator is provided between the external connection terminal and the battery case lid.
- the insulator is made of synthetic resin and is an insulating member for insulating the external connection terminal from the battery case lid.
- a gasket is provided between the element connection terminal and the battery case lid. The gasket seals the gap between the element connection terminal and the battery case lid and insulates them.
- Assembly of the electrode terminal member, etc., to the battery case cover is performed by sequentially inserting a gasket, battery case cover, insulator, and external connection terminal into the insertion part of the element connection terminal, and then caulking the tip of the insertion part. .
- the width dimension of the insulator provided in such a battery (the width dimension along the short direction of the square battery case) is slightly smaller than the width dimension along the short direction of the square battery case itself. Therefore, the separation distance from the outer peripheral side surface along the longitudinal direction of the insulator to the boundary portion of the battery case is short. Therefore, as shown in FIG. 17, the size of the longitudinal section of the flow path of the shield gas G is small, and the shield gas G cannot be sufficiently flowed along the boundary portion K.
- the plume F sometimes sways greatly along the inside / outside direction of the battery case 110.
- the high temperature plume F comes into contact with the insulator 180, and the insulator 180 is burnt.
- the insulator 180 is burnt, the insulation of the insulator 180 is deteriorated, and there may be a problem that the external connection terminal 137 and the battery case lid 113 cannot be insulated.
- a battery described in Patent Document 1 below is known as a battery that welds a battery case body and a battery case lid with a laser irradiated from above the battery case toward the upper surface of the battery case.
- the groove portion 311 is formed along the outer periphery of the battery case lid (sealing plate 31).
- a step 312 having a lower height nearer the center than at the outer periphery is formed.
- the stepped portion 312 Since the stepped portion 312 is present, there is no linear heat transfer path along the surface of the sealing plate from the molten pool 60 toward the central portion of the sealing plate 31, so that the sealing plate from the molten pool 60 is sealed during laser sealing. It is said that heat radiation to the center of 31 can be suppressed, and as a result, thermal damage to members such as an insulating member (gasket 33) around the welded portion can be reduced.
- Patent Document 1 does not take into account any plume that rises from the upper surface of the battery case when welding the battery case body (exterior can 10) and the battery case lid (sealing plate 31). For this reason, the plume generated during welding may burn the insulating member (gasket 33) interposed between the electrode terminal member (negative electrode terminal 32) and the battery case lid (sealing plate 31), thereby reducing the insulation. .
- the present invention has been made to solve the above problems. That is, the problem is to provide a battery that can prevent the insulating member from scorching due to the plume during laser welding of the battery case lid to the battery case body.
- a battery according to an aspect of the present invention which has been made for the purpose of solving this problem, includes a power generation element, a battery case main body having an opening in the upper portion and accommodating the power generation element therein, A battery case lid that is closed, an electrode terminal member that is electrically connected to the power generation element inside the battery case body, and extends outside the battery case lid, and an electrode terminal disposed on the battery case lid An external insulating member that insulates the member and the battery case lid.
- the battery case lid is fitted to the inside of the opening, and the laser is irradiated from above the battery case lid toward the boundary between the battery case lid and the battery case body. It is to be welded.
- the battery further includes a plume restricting portion that prevents the plume rising from the boundary portion during welding from rising toward the external insulating member.
- a plume restricting portion that prevents the plume rising from the boundary portion during welding from rising toward the external insulating member.
- the “power generation element” for example, a wound-type power generation element formed by winding a long positive electrode, a negative electrode, and a separator, or a plurality of positive electrodes, negative electrodes, and separators each having a predetermined shape are stacked. And a laminated power generation element.
- the plume restriction unit restricts the plume from rising toward the external insulating member. Therefore, when the battery case lid is welded to the battery case main body, the external insulating member can be prevented from being burnt by the plume. As a result, the insulating property of the external insulating member can be kept good.
- the opening has a rectangular shape having a pair of long sides and a pair of short sides, and the battery case lid and the external insulating member extend along the long sides of the external insulating member. It is desirable that a space entering inside from the upper portion of the outer peripheral side surface is formed along the long side portion, and the space constitutes a plume regulating portion.
- the space formed by the battery case lid and the external insulating member can be used as a shield gas flow path. Therefore, the cross-sectional area of the shield gas flow path can be increased, and a sufficient amount of shield gas can flow along the long side portion of the battery case body. If a sufficient amount of shielding gas flows, fluctuation along the plume inside and outside will be reduced. As a result, the plume can be prevented from rising toward the external insulating member.
- the space formed by the battery case lid and the external insulating member is recessed below the upper surface of the outer peripheral edge of the battery case lid.
- the opening has a square shape having a pair of long sides and a pair of short sides
- the battery case body has a pair of first side walls having a long side and short sides.
- a pair of second side walls having a portion, and at least an upper portion of a portion in which the external insulating member is positioned between the first side walls is made thinner than other portions, and the thin portion is a plume. You may make it comprise a control part.
- the heat capacity of the thin portion in the first side wall portion is smaller than the heat capacity of the other portion, so that the thin portion melts better than the other portion during welding. Therefore, at the thin-walled portion, the weld bead is formed to the lower part because the boundary of the battery case body melts better than the boundary of the battery case lid. That is, when viewed in a longitudinal section along the short side, the straight line connecting the center position of the arc on the top surface of the weld bead and the center of the fan shape with the arc as the arc is outside the battery case with respect to the vertical direction. It will be inclined toward.
- the plume rises along a straight line connecting the center position of the arc on the upper surface of the weld bead and the center of the fan-shaped arc. Therefore, if the straight line connecting the center position of the arc on the upper surface of the weld bead and the fan-shaped center with the arc as an arc is inclined toward the outside of the battery case with respect to the vertical direction, the plume Is inclined to the outside of the battery case body and rises. Therefore, the plume can be kept away from the external insulating member disposed on the battery case lid. As a result, it is possible to prevent the external insulating member from scorching and to prevent the insulation of the external insulating member from being deteriorated.
- FIG. 1 It is sectional drawing which shows the battery which concerns on 1st Embodiment. It is a perspective view of the electrode body with which the battery of the embodiment is provided. It is a figure which shows the structure of the same electrode body. It is a figure which shows the positive electrode plate which comprises the same electrode body. It is a figure which shows the negative electrode plate which comprises the same electrode body. It is an enlarged view of the B section and C section of FIG. It is a figure which shows the cover member with a terminal which concerns on 1st Embodiment. It is a VIII arrow line view shown in FIG. It is IX-IX sectional drawing shown in FIG.
- FIG. 13 is a perspective view of a cross section of the battery case body viewed from XIII-XIII shown in FIG. 12. It is a figure which shows a mode when the battery case cover and battery case main body which concern on 2nd Embodiment are welded. It is a figure which shows the example of a change of the battery which concerns on 2nd Embodiment.
- FIG. 1 is a cross-sectional view of a battery 100 according to the first embodiment.
- the battery 100 according to the first embodiment includes a square battery case 110 and a square battery case 110 including an electrode body (corresponding to a power generation element) 150 accommodated in the battery case 110. It is a lithium ion secondary battery.
- the battery 100 is mounted on a vehicle such as a hybrid car or an electric vehicle, or a battery using device such as a hammer drill.
- the top, bottom, left, and right refer to FIG. 1, and the front side of the page in FIG. 1 is the front and the back side of the page is the back.
- Electrode Body 150 will be described with reference to FIGS. As shown in FIGS. 2 and 3, the electrode body 150 is a flat wound electrode body in which a belt-like positive electrode plate 155, a negative electrode plate 156, and a separator 157 are wound into a flat shape.
- the positive electrode plate 155 has a belt-like shape extending in the longitudinal direction DA, and includes a positive electrode base material 151 made of aluminum foil, and a positive electrode mixture layer 152 disposed on a part of the surface of the positive electrode base material 151. have.
- the positive electrode mixture layer 152 includes a positive electrode active material 153, a conductive material made of acetylene black, and PVDF (binder).
- the positive electrode base material 151 a portion where the positive electrode mixture layer 152 is coated is referred to as a positive electrode mixture layer coating portion 151c.
- a portion where the positive electrode mixture layer 152 is not coated is referred to as a positive electrode mixture layer uncoated portion 151b.
- the positive electrode mixture layer uncoated portion 151b is located at the end portion (left end portion in FIG. 4) of the positive electrode base material 151 (positive electrode plate 155) in the width direction DB (left and right direction in FIG. 4).
- the positive electrode base material 151 (positive electrode plate 155) extends in a strip shape in the longitudinal direction DA (vertical direction in FIG. 4).
- the negative electrode plate 156 has a strip shape extending in the longitudinal direction DA, a negative electrode base material 158 made of copper foil, and a negative electrode mixture layer disposed on a part of the surface of the negative electrode base material 158. 159.
- the negative electrode mixture layer 159 includes a negative electrode active material 154, SBR (binder), and CMC (thickening agent).
- the portion of the negative electrode base material 158 where the negative electrode mixture layer 159 is coated is referred to as a negative electrode mixture layer coating portion 158c.
- a portion of the negative electrode base material 158 where the negative electrode mixture layer 159 is not coated is referred to as a negative electrode mixture layer uncoated portion 158b.
- the negative electrode mixture layer uncoated portion 158b is located at the end (right end in FIG. 5) of the negative electrode base 158 (negative electrode plate 156) in the width direction DB (left and right in FIG. 5).
- the negative electrode base material 158 (negative electrode plate 156) extends in a strip shape in the longitudinal direction DA (vertical direction in FIG. 5).
- FIG. 6 is an enlarged view of a portion B and a portion C in FIG.
- symbol is written in FIG.
- FIG. 7 is an exploded perspective view of a part of the terminal cover member 115 according to the first embodiment.
- FIG. 8 is a view taken along arrow VIII shown in FIG.
- the battery case 110 includes a rectangular box-shaped battery case main body 111 having an opening 111 d and a plate-shaped battery case lid 113 that closes the opening 111 d of the battery case main body 111.
- the battery case 110 is made of metal (specifically, pure aluminum).
- the battery case main body 111 accommodates the electrode body 150 therein.
- the battery case lid 113 is joined to the battery case main body 111 by welding.
- the battery case body 111 has a bottomed box shape having an opening 111d for housing the electrode body 150 on the upper surface side.
- the opening 111d is a top view surrounded by a pair of long sides 10 (see FIG. 8) along the longitudinal direction (left-right direction) and a pair of short sides 11 along the short direction (front-rear direction). It is substantially rectangular.
- the battery case main body 111 includes a rectangular plate-like case bottom wall portion 111b facing the battery case lid 113, and four case side wall portions 111c erected upward from the periphery of the case bottom wall portion 111b.
- the case side wall portion 111c includes a front wall portion 111ca and a rear wall portion 111cb (see FIG. 8) along the longitudinal direction (that is, the left-right direction) of the battery case 100 as viewed from above, and a short side of the battery case 100 as viewed from above. It consists of a left wall portion 111cc and a right wall portion 111cd along the direction (ie, the front-rear direction) (see FIG. 1).
- the front wall portion 111ca and the rear wall portion 111cb are opposed to each other.
- the upper part of the front wall part 111ca and the upper part of the rear wall part 111cb form the pair of long side parts 10 described above (see FIG. 8).
- the front wall portion 111ca and the rear wall portion 111cb correspond to a pair of first side wall portions.
- the left wall portion 111cc and the right wall portion 111cd face each other.
- the upper portion of the left wall portion 111cc and the upper portion of the right wall portion 111cd form the pair of short side portions 11 described above (see FIG. 1).
- the left wall portion 111cc and the right wall portion 111cd correspond to a pair of second side wall portions.
- the upper surface of the left wall portion 111cc has a lower upper surface on the inner surface side than an upper surface on the outer surface side. That is, a step portion 111e is formed on the upper portion of the left wall portion 111cc. A stepped portion 111e is similarly formed on the upper portion of the right wall portion 111cd. These step portions 111e support the left and right ends of the battery case lid 113 on the upper surface when the battery case lid 113 is fitted into the opening 111d of the battery case body 111.
- Battery case lid (lid member with terminal)
- the battery case lid 113 has a rectangular plate shape, and circular through holes 113h and 113k penetrating the battery case lid 113 are formed at both ends in the longitudinal direction (left and right direction).
- a safety valve 113j is provided at the center of the battery case lid 113 in the longitudinal direction.
- the safety valve 113j is formed integrally with the battery case lid 113 and forms a part of the battery case lid 113.
- the safety valve 113j is formed thinner than other portions of the battery case lid 113, and a groove 113jv is formed on the upper surface thereof (see FIG. 7). As a result, the safety valve 113j operates when the internal pressure inside the battery case 110 reaches a predetermined pressure. That is, when the internal pressure reaches a predetermined pressure, the groove 113jv breaks, and the gas inside the battery case 110 is released to the outside.
- a liquid injection port 113n for injecting an electrolyte (not shown) into the battery case 110 is formed between the safety valve 113j and the through hole 113k of the battery case lid 113 (see FIG. 1).
- the liquid injection port 113n is sealed with a liquid injection plug 113m.
- the battery 100 is connected to the electrode body 150 inside the battery case main body 111 and is extended to the outside through the through holes 113h and 113k of the battery case lid 113 (positive terminal member 130 and negative terminal member 140). ).
- the positive electrode terminal member 130 includes a positive electrode connection member (element connection terminal) 135, a positive electrode external terminal member (external connection terminal) 137, and a positive electrode fastening member (bolt) 139 (see FIGS. 1 and 7).
- the positive electrode connection member 135 is made of metal (pure aluminum), is connected to the electrode body 150, and extends to the outside through the through hole 113 h of the battery case lid 113.
- the positive electrode external terminal member 137 is made of metal, is located on the battery case lid 113 (outside of the battery case 110), and is electrically connected to the positive electrode connection member 135 outside the battery case 110.
- the positive electrode fastening member 139 is made of metal, is located on the battery case lid 113 (outside of the battery case 110), and is electrically connected to the positive electrode external terminal member 137.
- the positive electrode connection member 135 includes a pedestal part 131, an insertion part 132, an electrode body connection part 134, and a caulking part 133 (see FIGS. 1, 6, and 7).
- the pedestal 131 has a rectangular plate shape and is located inside the battery case main body 111.
- the insertion portion 132 has a cylindrical shape protruding from the upper surface 131 f of the pedestal portion 131 and is inserted through the through hole 113 h of the battery case lid 113.
- the caulking portion 133 is a portion connected to the upper end of the insertion portion 132, is caulked (deformed so as to be expanded in diameter), has a disk shape, and is electrically connected to the positive electrode external terminal member 137. .
- the electrode body connecting portion 134 is welded to the positive electrode mixture layer uncoated portion 151 b of the electrode body 150 in a form extending from the lower surface 131 b of the pedestal portion 131 toward the bottom wall portion 111 b of the battery case body 111. Thereby, the positive electrode connection member 135 and the electrode body 150 are electrically and mechanically connected.
- the positive external terminal member 137 is made of a metal plate and has a substantially Z shape in side view.
- the positive external terminal member 137 includes a fixing portion 137f fixed by the crimping portion 133, a connecting portion 137g connected to the positive electrode fastening member 139, and a connecting portion 137h connecting the fixing portion 137f and the connecting portion 137g. ing.
- a through hole 137b is formed in the fixing portion 137f, and the insertion portion 132 of the positive electrode connection member 135 is inserted into the through hole 137b.
- the connecting portion 137g is also formed with a through hole 137c penetrating therethrough.
- the positive electrode fastening member 139 is a metal bolt and has a rectangular plate-shaped head portion 139b and a columnar shaft portion 139c. A portion on the tip side of the shaft portion 139c is a screw portion 139d. The shaft portion 139c of the positive electrode fastening member 139 passes through the through hole 137c of the positive electrode external terminal member 137.
- the negative electrode terminal member 140 includes a negative electrode connection member (element connection terminal) 145, a negative electrode external terminal member (external connection terminal) 147, and a negative electrode fastening member (bolt) 149 (see FIGS. 1 and 7).
- the negative electrode connection member 145 is made of metal (pure copper), is connected to the electrode body 150, and extends to the outside through the through hole 113 k of the battery case lid 113.
- the negative external terminal member 147 is made of metal, is located on the battery case lid 113 (outside the battery case 110), and is electrically connected to the negative electrode connection member 145 outside the battery case 110.
- the negative electrode fastening member 149 is made of metal, is located on the battery case lid 113 (outside of the battery case 110), and is electrically connected to the negative electrode external terminal member 147.
- the negative electrode connection member 145 includes a pedestal portion 141, an insertion portion 142, an electrode body connection portion 144, and a caulking portion 143 (see FIGS. 1, 6, and 7).
- the pedestal portion 141 has a rectangular plate shape and is located inside the battery case body 111.
- the insertion portion 142 has a cylindrical shape protruding from the upper surface 141 f of the pedestal portion 141 and is inserted through the through hole 113 k of the battery case lid 113.
- the caulking portion 143 is a portion connected to the upper end of the insertion portion 142, is caulked (deformed so as to be expanded in diameter), has a disk shape, and is electrically connected to the negative external terminal member 147. .
- the electrode body connecting portion 144 is welded to the negative electrode mixture layer uncoated portion 158b of the electrode body 150 in a form extending from the lower surface 141b of the pedestal portion 141 toward the bottom wall portion 111b of the battery case body 111. Thereby, the negative electrode connection member 145 and the electrode body 150 are electrically and mechanically connected.
- the negative external terminal member 147 is made of a metal plate and has a substantially Z shape in side view.
- the negative electrode external terminal member 147 includes a fixing portion 147f fixed by the crimping portion 143, a connecting portion 147g connected to the negative electrode fastening member 149, and a connecting portion 147h connecting the fixing portion 147f and the connecting portion 147g. ing.
- a through hole 147b is formed in the fixing portion 147f, and the insertion portion 142 of the negative electrode connection member 145 is inserted into the through hole 147b.
- the connecting portion 147g is also formed with a through hole 147c penetrating therethrough.
- the negative electrode fastening member 149 is a metal bolt, and has a rectangular plate-shaped head portion 149b and a columnar shaft portion 149c. A portion on the tip side of the shaft portion 149c is a screw portion 149d. The shaft portion 149 c of the negative electrode fastening member 149 is inserted through the through hole 147 c of the negative electrode external terminal member 147.
- the battery 100 includes a first insulating member 170 that is interposed between the positive electrode terminal member 130 (specifically, the positive electrode connecting member 135) and the battery case lid 113 and electrically insulates both.
- the first insulating member 170 is also interposed between the negative electrode terminal member 140 (specifically, the negative electrode connecting member 145) and the battery case lid 113.
- the first insulating member 170 is a gasket made of an electrically insulating resin (specifically, PFA).
- the first insulating member 170 has an insulating interposition part 171, an insulating side wall part 173, and an insertion part 175 (see FIGS. 6 and 7).
- the insulation interposition part 171 has a flat plate shape, and the upper surface 131f (upper surface 141f) of the pedestal portion 131 (pedestal portion 141) of the positive electrode terminal member 130 (negative electrode terminal member 140) and the lower surface (inner surface) of the battery case lid 113. 113b.
- the insulating side wall part 173 is a square annular side wall part located on the outer peripheral edge of the insulating interposition part 171.
- the insulating side wall portion 173 surrounds the outer peripheral side surface 131g (outer peripheral side surface 141g) of the pedestal portion 131 (pedestal portion 141).
- the insertion portion 175 is a cylindrical portion located at the inner peripheral edge (center portion in a top view) of the insulating interposed portion 171, protrudes upward from the upper surface 171 f of the insulating interposed portion 171, and passes through the through hole 113 h of the battery case lid 113. It is inserted through (through hole 113k).
- An insertion hole 175a through which the insertion portion 132 of the positive electrode terminal member 130 (the insertion portion 142 of the negative electrode terminal member 140) is inserted is formed in the cylinder of the insertion portion 175.
- the battery 100 is made of an electrically insulating resin (specifically, 100% PPS) and includes a second insulating member (corresponding to an external insulating member) 180 disposed on the battery case lid 113.
- the second insulating member 180 is also referred to as an insulator.
- the second insulating member 180 is interposed between the positive electrode terminal member 130 (specifically, the positive electrode external terminal member 137 and the positive electrode fastening member 139) and the battery case lid 113, and electrically insulates both.
- the second insulating member 180 is also interposed between the negative electrode terminal member 140 (specifically, the negative electrode external terminal member 147 and the negative electrode fastening member 149) and the battery case lid 113.
- the second insulating member 180 includes a head arrangement portion 181 where the head portion 139b of the positive electrode fastening member 139 (the head portion 149b of the negative electrode fastening member 149) is arranged, and a fixing portion 137f of the positive electrode external terminal member 137. And a fastening arrangement portion 183 in which the (fixing portion 147f of the negative electrode external terminal member 147) is arranged.
- the fastening arrangement portion 183 is formed with a through hole 183b penetrating therethrough, and the insertion portion 132 of the positive electrode terminal member 130 (the insertion portion 142 of the negative electrode terminal member 140) is inserted into the through hole 183b. Yes.
- the battery case lid 113, the electrode terminal members (the positive terminal member 130 and the negative terminal member 140), the first insulating members 170 and 170, and the second insulating members 180 and 180 are used as a lid member with a terminal.
- 115 is configured (see FIGS. 6 and 7). Specifically, the positive external terminal member 137, the second insulating member 180, the battery case lid 113, and the first insulating member 170 are sandwiched between the crimped portion 133 and the pedestal portion 131 of the positive electrode terminal member 130.
- the negative electrode external terminal member 147, the second insulating member 180, the battery case lid 113, and the first insulating member 170 are sandwiched between the crimped portion 143 and the base portion 141 of the negative electrode terminal member 140.
- the terminal-attached lid member 115 in which these are integrated is formed.
- the insulation interposition part 171 of the first insulating member 170 includes the upper surface 131f (upper surface 141f) of the pedestal portion 131 (pedestal portion 141) of the positive electrode terminal member 130 (negative electrode terminal member 140) and the battery case. It is sandwiched between the lower surface (inner surface) 113b of the lid 113 and is elastically compressed and arranged in its own thickness direction (axial direction indicated by AX in FIG. 6). Further, the insertion portion 175 of the first insulating member 170 is elastically compressed in its own axial direction (the axial direction indicated by AX in FIG. 6), and its tip 175 b is in close contact with the second insulating member 180. . In this manner, the through holes 113h and 113k of the battery case lid 113 are sealed by the first insulating member 170.
- FIGS. 9 is a cross-sectional view taken along the line IX-IX shown in FIG.
- the second insulating member 180 provided on the positive electrode terminal member 130 side will be described, and the second insulating member 180 provided on the negative electrode terminal member 140 will be described in the second provided on the positive electrode terminal member 130. Since it is the same as 2 insulation member 180, description is abbreviate
- the lower part of the side surface 185 along the longitudinal direction (left-right direction) of the battery case lid 113 is cut out inward. That is, the side surface 185 of the second insulating member 180 includes a vertical surface portion 185a along the vertical direction and an inclined surface portion 185b that inclines inward from the lower end of the vertical surface portion 185a.
- a lower portion of the side surface 185 of the second insulating member 180 having the inclined surface portion 185b is referred to as a relief portion 186 (or a notch portion 186).
- the escape portion 186 is formed in the entire lower portion of the side surface 185 of the second insulating member 180 along the left-right direction.
- the same relief portion 186 is formed on the lower portion of the front side surface 185 and the lower portion of the rear side surface 185 of the second insulating member 180.
- the inclination ⁇ 1 of the inclined surface portion 185b with respect to the vertical plane shown in FIG. 9 is about 135 °.
- the separation distance L1 (see FIG. 9) along the front-rear direction from the upper edge to the lower edge of the inclined surface portion 185b is about 0.3 mm.
- the separation distance L2 along the front-rear direction from the side surface 185 of the second insulating member 180 to the outer peripheral side surface of the battery case lid 113 is three times the plate thickness L3 of the rear wall portion 111cb of the battery case body 111. ing.
- the battery case lid 113 includes four recesses 15 on the upper surface.
- Each recess 15 extends along the longitudinal direction (left-right direction) of the battery case lid 113.
- the recess 15 is formed inside the outer peripheral edge of the battery case lid 113.
- the recesses 15 are formed on both the front edge side and the rear edge side of the battery case lid 113, and at both ends of the left end portion where the positive electrode terminal member 130 is provided and the right end portion where the negative electrode terminal member 140 is provided. .
- the length of each recess 15 along the left-right direction is slightly longer than the length of the second insulating member 180 along the left-right direction.
- the front concave portion 15a formed on the front edge side and the rear concave portion 15b formed on the rear edge side have the same length in the left-right direction, and the left end of the front concave portion 15a and the rear concave portion 15b The left end and the right end of the front concave portion 15a and the right end of the rear concave portion 15b are formed to coincide with each other in the front-rear direction.
- a second insulating member 180 is placed in a region sandwiched between the front recess 15a and the rear recess 15b. That is, the battery case lid 113 has a placement portion 16 (see FIG.
- L4 shown in FIG. 9 indicates a separation distance from the bottom surface 15c of the recess 15 to the upper surface 17a of the outer peripheral edge portion 17 of the battery case lid 113. L4 is about 0.25 mm in the embodiment.
- the second insulating member 180 and the battery case lid are formed as shown in FIG. 113 forms a space S.
- the space S escapes to the internal space S1 in the recess 15 formed in the battery case cover 113 (the space S1 recessed below the upper surface 17a of the outer peripheral edge 17 of the battery case cover 113) and the second insulating member 180.
- the manufacturing process of the battery 100 of the first embodiment will be described. First, the electrode body 150, the battery case body 111, and the terminal cover member 115 configured as described above are prepared (manufactured).
- the electrode body connecting portion 134 of the positive electrode connecting member 135 is welded to the positive electrode mixture layer uncoated portion 151 b of the electrode body 150. Further, the electrode body connecting portion 144 of the negative electrode connecting member 145 is welded to the negative electrode mixture layer uncoated portion 158 b of the electrode body 150.
- the positive electrode terminal member 130 and the positive electrode plate 155 are electrically connected
- the negative electrode terminal member 140 and the negative electrode plate 156 are electrically connected
- the terminals are attached.
- the lid member 115 and the electrode body 150 are integrated.
- the electrode body 150 is housed inside the battery case body 111 and the opening 111 d of the battery case body 111 is closed by the battery case lid 113. Then, the battery case lid 113 and the battery case main body 111 are joined together by welding all around.
- a portion to be joined by welding is a boundary portion (seam) between the battery case lid 113 and the battery case main body 111, which is indicated by a symbol K in FIG.
- the boundary portion K may be referred to as a welded portion K.
- the boundary portion K (welded portion K) is a portion in which the vicinity of the boundary between the battery case lid 113 and the battery case body 111 is combined with the vicinity of the boundary between the battery case body 111 and the battery case lid 113.
- the boundary K is formed on the upper surface 110a of the battery case 110 as shown in FIG.
- the battery case is formed by vertical can welding that irradiates a CW laser (Continuous wave laser) from above the battery case 110 toward the boundary K formed on the upper surface 110a of the battery case 110.
- the lid 113 and the battery case body 111 are joined.
- the plume F rises upward from the weld K as shown in FIG.
- the plume F is a rise of evaporated metal like smoke, and is mainly composed of Ar (argon) vapor and plasma.
- Ar argon
- the gas G is caused to flow along the left-right direction between the plume F and the electrode terminal members (the positive terminal member 130 and the negative terminal member 140).
- the shielding gas G creates a gas flow around the plume F such that the plume F rises along a substantially vertical plane (that is, a gas flow that does not sway significantly along the front-rear direction shown in FIG. 10), This is because F can prevent the electrode terminal members (the positive electrode terminal member 130 and the negative electrode terminal member 140) and the second insulating member 180 from being damaged.
- the space S is formed by the battery case lid 113 and the second insulating member 180.
- the battery 100 of the first embodiment has a larger cross-sectional area of the flow path of the shielding gas G than the battery of the prior art shown in FIG. Therefore, the battery 100 according to the first embodiment can flow more shielding gas G between the plume F and the electrode terminal members (the positive terminal member 130 and the negative terminal member 140) than the conventional battery. . That is, a sufficient amount of the shielding gas G can be allowed to flow between the plume F and the electrode terminal members (the positive terminal member 130 and the negative terminal member 140) to reduce the fluctuation of the plume F. Therefore, it is possible to prevent the electrode terminal members (the positive terminal member 130 and the negative terminal member 140) and the second insulating member 180 from being damaged.
- the prior art battery shown in FIG. 17 is different from the battery 100 of the first embodiment in that the battery case cover 113 does not have the recess 15 and the second insulating member 180 does not have the escape portion 186. Further, as the shielding gas G flowing along with welding, for example, a gas containing Ar (argon) as a main component is used.
- Ar Ar
- an electrolytic solution is injected into the battery case main body 111 through the liquid inlet 113 n of the battery case lid 113, and this electrolytic solution is injected into the electrode body 150. Impregnate inside.
- the liquid inlet 113n of the battery case lid 113 is sealed with a liquid stopper 113m. Thereafter, predetermined processing is performed to complete the battery 100 (see FIG. 1) of the first embodiment.
- the battery 100 of the first embodiment has the electrode body 150 (power generation element) and the upper portion 111d, and accommodates the electrode body 150 therein.
- the battery case main body 111, the battery case cover 113 for closing the opening 111 d of the battery case main body 111, the battery case main body 111 and the electrode body 150 being electrically connected inside the battery case main body 111,
- the battery case lid 113 is fitted inside the opening 111d and extends from above the battery case lid 113 to a boundary K between the battery case lid 113 and the battery case body 111 formed on the upper surface 110a of the battery case 110.
- the battery case body 111 is welded by being irradiated with a laser.
- the battery 100 includes a plume regulating unit 300 that prevents the plume F rising from the boundary portion K during welding from rising toward the second insulating member 180.
- the space S formed by the battery case lid 113 and the second insulating member 180 constitutes the plume regulating unit 300.
- the opening 111d has a square shape having a pair of long sides 10 and a pair of short sides 11.
- the battery case lid 113 and the second insulating member 180 allow a space S to enter the inside of the upper side (vertical surface portion 185a) of the outer peripheral side surface 185 along the long side portion 10 in the second insulating member 180. , And formed along the long side portion 10.
- This space S constitutes the plume regulating unit 300.
- the battery case lid 113 and the second insulating member 180 are the upper part (vertical surface portion) of the outer peripheral side surface 185 along the long side portion 10 of the second insulating member 180.
- a space S that enters the inner side of 185a) is formed along the long side portion 10, and the plume regulating portion 300 is constituted by the space S.
- the part which produces space S among the battery case cover 113 and the 2nd insulating member 180 comprises the plume control part 300.
- the space S formed by the battery case lid 113 and the second insulating member 180 can be used for the flow path of the shield gas G. Therefore, the cross-sectional area of the flow path of the shield gas G can be increased as compared with the battery of the prior art shown in FIG. Can flow along. Accordingly, since a sufficient amount of the shielding gas G flows, the plume F is less likely to sway along the inside and outside directions, so that the plume F rises toward the second insulating member 180 (in other words, the plume F is the second Can be prevented from approaching the insulating member 180).
- the second insulating member 180 it is possible to prevent the second insulating member 180 from being burnt by the plume F when the battery case lid 113 is welded to the battery case body 111. As a result, the insulating property of the second insulating member 180 can be kept good.
- the space S formed by the battery case lid 113 and the second insulating member 180 is below the upper surface 17a of the outer peripheral edge 17 of the battery case lid 113. It is a dent. That is, the battery case lid 113 is formed with a recess 15, and this recess 15 also forms a space S.
- the space S that can be used as the flow path of the shield gas G can be formed larger than when the recess 15 is not provided. Therefore, since more shielding gas G can be flowed than in the case where there is no recess 15, the swing along the plume F in the front-rear direction (inside and outside of the battery case lid 113) can be reduced. Therefore, the plume F can be more reliably prevented from rising toward the second insulating member 180.
- the battery case 110 is enlarged and the separation distance (see L2 in FIG. 9) between the case side wall 111c and the second insulating member 180 is increased, the cross-sectional area of the flow path of the shield gas G increases. Then, the width along the front-rear direction of the battery case 110 becomes thick, which is inconvenient.
- the second insulating member 180 is made small so that the distance between the case side wall 111c and the second insulating member 180 is increased, the insulating distance may not be secured.
- the second insulation by the plume F without increasing the width along the front-rear direction of the battery case 110 and without impairing the insulation function by the second insulating member 180. Burning of the member 180 can be prevented.
- the battery 100 of the embodiment can be mounted on a vehicle that uses the electric energy from the battery 100 as a whole or a part of a power source.
- vehicle examples include an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric wheelchair, an electric assist bicycle, and an electric scooter.
- the second insulating member 180 includes a horizontal plane (a lower edge of the rear inclined surface portion 185 b and a lower edge of the front inclined surface portion 185 b ( The bottom surface 180 a) is connected to the bottom surface 180 a, and the bottom surface 180 a is placed on the top surface 16 a of the placement portion 16 of the battery case lid 113.
- the upper surface 16 a of the mounting portion 16 is located above the bottom surface 15 c of the recess 15.
- the second insulating member 180 and the battery case lid 113 may be configured like the second insulating member 180A and the battery case lid 113A shown in FIG.
- the second insulating member 180A shown in FIG. 11 includes a protruding portion 188 that protrudes further downward than the lower edge of the inclined surface portion 185b.
- the side surface 185 along the longitudinal direction of the second insulating member 180A includes a vertical surface portion 185a (referred to as the first vertical surface portion 185a), an inclined surface portion 185b continuous with the first vertical surface portion 185a, and a lower edge of the inclined surface portion 185b. And a second vertical surface portion 185c connected to the inclined surface portion 185b along the vertical direction.
- the placement portion 16A of the battery case lid 113A is formed at the same height as the bottom surface 15c of the recess 15 without protruding upward from the bottom surface 15c of the recess 15.
- the space S can be created in the same manner as the battery 100 of the first embodiment, and therefore, the same effect as the battery 100 of the first embodiment can be obtained. That is, in the battery according to the present invention, it is sufficient that the space S is formed by the battery case lid 113 and the second insulating member 180.
- the shapes of the battery case lid 113 and the second insulating member 180 are as shown in FIG. It is not limited to things.
- the space S includes a space S1 that is recessed below the upper surface 17a of the outer peripheral edge portion 17 of the battery case lid 113, and a relief portion 186 formed in the second insulating member 180.
- the space S2 formed between the battery case lid 113 and the escape portion 186 is configured as a combined space (see FIG. 9).
- the space S is configured only by the space S2 formed between the battery case lid 113 and the escape portion 186 (inclined surface portion 185b) by forming the escape portion 186 in the second insulating member 180. May be.
- the cross-sectional area of the flow path of the shield gas G is reduced because the battery case lid 113 does not have the recess 15 (the space S1 does not exist).
- the cross-sectional area of the flow path of the shield gas G can be increased by the amount of the relief portion 186 (the amount of space S2), more shields than the prior art can be obtained. Gas G can be flowed and plume F shaking can be reduced.
- the battery 200 of the second embodiment is characterized by the shape of the battery case body 111, and the shapes of the battery case body 111 and the battery case lid 113 are different from the battery 100 of the first embodiment.
- the escape portion 186 is not formed in the second insulating member 180, and the recess 15 is not formed in the battery case lid 113. That is, the battery 200 of the second embodiment does not have the space S.
- Other configurations are the same as those of the battery 100 of the first embodiment.
- the same components as those of the battery 100 of the first embodiment are denoted by the same reference numerals as those of the battery 100 of the first embodiment, and description thereof is omitted.
- FIG. 12 is a top view on the positive electrode terminal member 130 side of the battery 200 of the second embodiment.
- FIG. 13 is a perspective view of a cross section of the battery case main body 111 taken along line XIII-XIII shown in FIG.
- the thin wall portion 20 is formed on the front wall portion 111 ca of the battery case body 111.
- the thin portion 20 is a portion in the front wall portion 111ca where the thickness along the inner and outer directions of the battery case is thinner than other portions. That is, the thickness t1 (see FIG.
- the thin-walled portion 20 has a thickness t1 from the upper end to the lower end.
- the thickness of the case side wall 111c is t2 that is the same as the thickness of the normal portion 30 of the second embodiment over the entire area. It was.
- Such a thin-walled portion 20 of the second embodiment is the entire area of the portion along the front-rear direction with the second insulating member 180 when viewed from above in the state where the terminal cover member 115 is assembled to the battery case body 111 (in FIG. 12).
- the portion is shown by shading. That is, the length dimension along the left-right direction of the thin portion 20 is substantially the same as the length dimension along the left-right direction of the second insulating member 180.
- the thin wall portion 20 is formed in the rear wall portion 111cb as well as the front wall portion 111ca.
- the thin portion 20 of the rear wall portion 111cb is formed at a position facing the thin portion 20 of the front wall portion 111ca.
- the second insulating member 180 is sandwiched between the thin part 20 of the front wall part 111ca and the thin part 20 of the rear wall part 111cb when viewed from above. Will be located.
- the thin-walled portion 20 is formed on the negative electrode terminal member 140 side of the battery 200 as well as the positive electrode terminal member 130 side.
- the battery case lid 113 according to the second embodiment has a side portion of the battery case lid 113 that is the same as the shape of the battery case body 111 in which the thin portion 20 is formed as described above. It has a shape that protrudes outward to fill the top. That is, as shown in FIG. 12, the battery case lid 113 can be fitted to the opening 111d of the battery case main body 111 with almost no gap.
- a place to be joined by welding is a boundary portion (welded portion) between the battery case lid 113 and the battery case main body 111, which is indicated by a symbol K in FIG.
- the boundary portion K is a portion in which the vicinity of the boundary between the battery case lid 113 and the battery case body 111 is combined with the vicinity of the boundary between the battery case body 111 and the battery case lid 113.
- the CW The battery case lid 113 and the battery case main body 111 are joined together by vertical can welding that irradiates a laser (continuous wave laser).
- the plume F rises upward from the welded portion K (see FIG. 14).
- the plume F rises in a vertical cross section along the front-rear direction, approximating the upper surface 40a of the weld bead 40 formed by welding to an arc, and forming a sector having the arc as an arc.
- it substantially coincides with the direction of a straight line X connecting the center of the sector (see symbol O in FIG. 14) and the center position of the arc of the sector (see symbol P in FIG. 14).
- the thin portion 20 melts well in the welding of the thin portion 20. Therefore, in the thin portion 20, the weld bead 40 is formed so as to reach the outer surface of the battery case body 111. Therefore, the straight line X connecting the point O and the point P is inclined toward the outside of the battery case 110 with respect to the vertical direction. That is, the plume F tilts and rises toward the outside of the battery case 110. This means that the plume F rises in a direction away from the electrode terminal members (the positive electrode terminal member 130 and the negative electrode terminal member 140) and the second insulating member 180. Therefore, in the battery 200 of the second embodiment including the thin-walled portion 20, it is possible to prevent the electrode terminal members (the positive terminal member 130 and the negative terminal member 140) and the second insulating member 180 from being damaged by the plume F.
- the conventional battery shown in FIG. 18 is one in which the thin portion 20 is not formed in the battery case main body 111. That is, in the battery shown in FIG. 18, the thickness of the case side wall 111c of the battery case main body 111 is the same as the thickness t2 of the normal portion 30 of the front wall 111ca shown in FIG. When welding such a battery case body 111 and the battery case lid 113, the weld bead 42 is formed in a shape that does not reach the outer surface of the battery case body 111, as shown in FIG. 18. This is because the normal portion 30 has a larger heat capacity than the thin portion 20 and is not easily melted.
- the strength of the laser during welding in the battery 200 of the second embodiment is such that a weld bead having a shape as shown in FIG. 18 is formed in the welding of the normal portion 30. In the battery 200 of the embodiment, it is assumed that the entire circumference of the boundary portion K is welded with this strength.
- the opening 111d has a rectangular shape having a pair of long sides 10 and a pair of short sides 11, and the battery case body 111 has a long shape.
- a pair of first side wall portions front wall portion 111ca and rear wall portion 111cb having a side portion 10
- a pair of second side wall portions left wall portion 111cc and right wall portion 111cd having a short side portion 11 (see FIG. 1).
- the portion of the front wall portion 111ca and the rear wall portion 111cb where the second insulating member 180 (external insulating member) is positioned is the other portion (the normal portion). 30)
- the thin-walled portion 20 is thinner.
- the thin portion 20 constitutes the plume regulating portion 400.
- the heat capacity of the thin portion 20 is smaller than the heat capacity of the other portion (normal portion 30) in the first side wall portion (front wall portion 111ca and rear wall portion 111cb). It melts better. Therefore, the weld bead 40 is formed at a location where the thin wall portion 20 is further below the welded portion K of the battery case body 111 than the welded portion K (boundary portion K) of the battery case lid 113 because the welded portion K of the battery case body 111 melts better.
- the thin portion 20 is configured with the same thickness t1 (see FIG. 12) from the upper end to the lower end of the case side wall portion 111c.
- the thin part 20 having the thickness t1 may be formed only on the upper part of the case side wall part 111c. Even in this case, the upper part of the case side wall 111c that is melted during welding has a small heat capacity and melts well, so that the same effect as the battery 200 of the second embodiment can be obtained. be able to.
- strength of the battery case main body 111 can be made high. it can.
- the upper surface 30a may be a horizontal surface 30aa along the horizontal direction, or may be an inclined surface 30ab inclined downward from the outside of the case to the inside as shown in FIG.
- the front wall portion 111ca and the rear wall portion 111cb of the case side wall portion 111c are provided with a thin portion 20 having a thickness t1 and a portion (normal portion 30) other than the thin portion 20 having a thickness t2.
- the thickness of the case side wall 111c located in the peripheral portion of the second insulating member 180 is equal to the thickness t1 of the thin portion 20 of the second embodiment.
- the thin portion 20 may be provided on the battery case main body 111 in any manner.
- the thickness of the front wall portion 111ca and the rear wall portion 111cb may be set to t1 for the entire region along the left-right direction. That is, it is good also as a structure which uses the whole area of the left-right direction of the front wall part 111ca and the rear wall part 111cb as the thin part 20.
- the thickness of the left wall portion 111cc and the right wall portion 111cd is set to t2 similar to that of the normal portion 30 of the second embodiment.
- the front wall portion 111ca and the rear wall portion 111cb are provided with a thin portion 20 having a thickness t1 and a portion (normal portion 30) other than the thin portion 20 having a thickness t2, and further, a left wall portion 111cc and a right wall portion
- the thickness of the portion 111 cd may be set to t1 similar to that of the thin portion 20.
- the thin wall portions 20 formed on the front wall portion 111ca, the left wall portion 111cc, and the rear wall portion 111cb surrounding the positive electrode terminal member 130 are connected to each other while maintaining the thickness t1.
- the thin wall portions 20 formed on the front wall portion 111ca, the right wall portion 111cd, and the rear wall portion 111cb surrounding the member 140 are preferably connected to each other while maintaining the wall thickness t1.
- the left wall portion 111cc (right wall portion 111cd) is located at a position close to the second insulating member 180, the left wall portion 111cc (right wall portion 111cd) is configured as described above. This is because the plume F can be prevented from scorching the second insulating member 180 during welding.
- the thickness may be t1 over the entire area of the case side wall 111c (front wall 111ca, rear wall 111cb, left wall 111cc, and right wall 111cd). That is, it is good also as a structure which makes the thin part 20 the whole region of case side wall part 111c (front wall part 111ca, rear wall part 111cb, left wall part 111cc, and right wall part 111cd).
- a configuration in which the thin portion 20 is provided only on the upper portion of the case side wall portion 111c (see FIGS. 15 and 16) It is desirable to do.
- the left wall part 111cc and the right wall part 111cd are comprised in this way, even when it is a case where it is difficult to reduce the thickness of the whole area of the left wall part 111cc and the right wall part 111cd, such as deep drawing, the left wall part 111cc and the right wall part This is because the thin portion 20 can be formed in the portion 111cd.
- the electrode terminal members (the positive terminal member 130 and the negative terminal member 140) are electrically connected to the electrode body 150 inside the battery case main body 111 and extend outside the battery case lid 113. If so, the positive electrode connecting member 135 (negative electrode connecting member 145), the positive electrode external terminal member 137 (negative electrode external terminal member 147), and the positive electrode fastening member 139 (negative electrode fastening member 149) need not necessarily be configured. Absent.
- the CW laser is used in the vertical sealed can welding, but a pulse laser may be used.
- a YAG laser, a carbon dioxide gas laser, an excimer laser, etc. can be used as a kind of laser used for welding.
- a YAG laser, a carbon dioxide gas laser, an excimer laser, etc. can be used as a kind of laser used for welding.
- a YAG laser, a carbon dioxide gas laser, an excimer laser, etc. can be used.
- what is necessary is just to select suitably about the welding speed, the kind of shield gas G, etc. according to welding design.
- the lithium secondary battery 100 is exemplified as the battery.
- the technical idea of the present invention can be applied to other types of secondary batteries such as a nickel metal hydride battery and a nickel cadmium battery.
- the battery 100 having the wound type power generation element (electrode body 150) is illustrated, but the technical idea of the present invention can be applied to a battery having a stacked type power generation element.
- the battery 100 having the square battery case 110 has been exemplified.
- the technical idea of the present invention can also be applied to a battery having a cylindrical battery case.
- the space S constitutes the plume restriction unit 300.
- the thin portion 20 constitutes the plume restricting portion 400.
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Abstract
Description
以下,本発明の電池を具体化した実施形態について,添付図面を参照しつつ詳細に説明する。図1は,第1実施形態に係る電池100の断面図である。第1実施形態に係る電池100は,図1に示すように,角型の電池ケース110と,電池ケース110の内部に収容された電極体(発電要素に相当する)150とを備える角型のリチウムイオン二次電池である。この電池100は,ハイブリッドカーや電気自動車等の車両や,ハンマードリル等の電池使用機器に搭載されるものである。なお,本明細書において,特に断りのない限りは,上下左右は,図1を基準にいうものとし,また,図1中紙面手前側を前方,紙面奥側を後方というものとする。
電極体150について図2~5に基づいて説明する。図2,3に示すように,電極体150は,帯状の正極板155,負極板156,及びセパレータ157を扁平形状に捲回した扁平型の捲回電極体である。
電池ケースについて図1及び6~8に基づいて説明する。図6は,図1のB部及びC部の拡大図である。なお,C部における部材のうちB部と異なるものについては,図6において符号を括弧書きしている。図7は,第1実施形態に係る端子付蓋部材115の一部を分解した斜視図である。図8は,図7に示すVIII矢視図である。
電池ケース本体111は,上面側に電極体150を収納するための開口部111dを有した有底の箱形状である。開口部111dは,長手方向(左右方向)に沿った一対の長辺部10(図8参照)と,短手方向(前後方向)に沿った一対の短辺部11とに囲まれた上面視略長方形状である。
電池ケース蓋113は,矩形板状をなし,その長手方向(左右方向)の両端部には,この電池ケース蓋113を貫通する円形状の貫通孔113h,113kが形成されている。また,電池ケース蓋113の長手方向の中央部には,安全弁113jが設けられている。この安全弁113jは,電池ケース蓋113と一体的に形成されて,電池ケース蓋113の一部をなしている。
次に,第1実施形態の電池100の製造工程について説明する。まず,上述のように構成した電極体150,電池ケース本体111,及び,端子付蓋部材115を用意(作製)する。
以上詳細に説明したように,第1実施形態の電池100は,電極体150(発電要素)と,上部に開口部111dを有して,電極体150を内部に収容する電池ケース本体111と,電池ケース本体111の開口部111dを閉塞する電池ケース蓋113と,電池ケース本体111の内部で電極体150に対して電気的に接続されるとともに,電池ケース蓋113の外側へ延出される電極端子部材(正極端子部材130,負極端子部材140)と,電池ケース蓋113上に配され,電極端子部材130,140と電池ケース蓋113とを絶縁する第2絶縁部材180(外部絶縁部材)と,を備える。電池ケース蓋113は,開口部111dの内側に嵌合されて,電池ケース蓋113の上方から,電池ケース110の上面110aに形成された電池ケース蓋113と電池ケース本体111との境界部Kに向かってレーザーが照射されることにより,電池ケース本体111に対して溶接されるものである。さらにこの電池100は,溶接時に境界部Kから立ち昇るプルームFが第2絶縁部材180に向かって立ち昇るのを防止するプルーム規制部300を備えている。第1実施形態の電池100では,電池ケース蓋113と第2絶縁部材180とにより形成される空間Sが,プルーム規制部300を構成している。
次に第1実施形態の電池100の変更例について説明する。第1実施形態の電池100では,図10に示すように,第2絶縁部材180は,後方側の傾斜面部185bの下縁と,前方側の傾斜面部185bの下縁とは,水平な平面(底面180a)でつながった形状とされており,この底面180aを,電池ケース蓋113の載置部16の上面16aに載置する構成とした。この載置部16の上面16aは,凹部15の底面15cよりも上方に位置するものであった。しかしながら,第2絶縁部材180および電池ケース蓋113を,図11に示す第2絶縁部材180Aおよび電池ケース蓋113Aのように構成してもよい。図11に示す第2絶縁部材180Aは,傾斜面部185bの下縁よりもさらに下方へ突出した突出部188を備えるものである。言い換えれば,第2絶縁部材180Aの長手方向に沿う側面185が,鉛直面部185a(これを第1鉛直面部185aという)と,第1鉛直面部185aに連なる傾斜面部185bと,傾斜面部185bの下縁から鉛直方向に沿って傾斜面部185bに連なる第2鉛直面部185cとからなるものである。電池ケース蓋113Aの載置部16Aは,凹部15の底面15cよりも上方へ突出させずに,凹部15の底面15cと同じ高さに形成されている。このような構成によっても,第1実施形態の電池100と同様,空間Sを作り出すことができるため,第1実施形態の電池100と同様の効果を奏することができる。すなわち本発明に係る電池は,電池ケース蓋113と第2絶縁部材180とにより空間Sが形成されていればよく,電池ケース蓋113や第2絶縁部材180の形状は,図10に示すようなものに限られない。
次に第2実施形態の電池200について,図12~図16及び図18に基づいて説明する。第2実施形態の電池200は,電池ケース本体111の形状に特徴があり,電池ケース本体111および電池ケース蓋113の形状が,第1実施形態の電池100とは異なっている。また,第2実施形態の電池200では,第2絶縁部材180に逃がし部186は形成されておらず,電池ケース蓋113に凹部15は形成されていない。すなわち,第2実施形態の電池200は,空間Sを有していない。その他の構成は第1実施形態の電池100と同様である。第2実施形態の電池200の説明において,第1実施形態の電池100と同様の構成については,第1実施形態の電池100と同様の符号を付して説明を省略する。
以上,本発明を実施形態に即して説明したが,本発明は上述の実施形態に限定されるものではなく,その要旨を逸脱しない範囲で,適宜変更して適用できることは言うまでもない。例えば,電極端子部材(正極端子部材130,負極端子部材140)は,電池ケース本体111の内部で電極体150に対して電気的に接続されるとともに,電池ケース蓋113の外側へ延出されるものであれば,必ずしも,正極接続部材135(負極接続部材145)と,正極外部端子部材137(負極外部端子部材147)と,正極締結部材139(負極締結部材149)とから構成されている必要はない。
11…短辺部
17…外周縁部
17a…上面
20…薄肉部
100…電池
111…電池ケース本体
111ca…前壁部(第1側壁部)
111cb…後壁部(第1側壁部)
111cc…左壁部(第2側壁部)
111cd…右壁部(第2側壁部)
111d…開口部
113…電池ケース蓋
130…正極端子部材(電極端子部材)
140…負極端子部材(電極端子部材)
150…電極体(発電要素)
180…第2絶縁部材(インシュレーター,外部絶縁部材)
185…外周側面
185a…鉛直面部
185b…傾斜面部
K…境界部
S…空間
Claims (4)
- 発電要素と,
上部に開口部を有して,前記発電要素を内部に収容する電池ケース本体と,
前記電池ケース本体の前記開口部を閉塞する電池ケース蓋と,
前記電池ケース本体の内部で前記発電要素に対して電気的に接続されるとともに,前記電池ケース蓋の外側へ延出される電極端子部材と,
前記電池ケース蓋上に配され,前記電極端子部材と前記電池ケース蓋とを絶縁する外部絶縁部材と,を備え,
前記電池ケース蓋は,前記開口部の内側に嵌合されて,前記電池ケース蓋の上方から,前記電池ケース蓋と前記電池ケース本体との境界部に向かってレーザーが照射されることにより,前記電池ケース本体に対して溶接されるものである電池であって,
前記溶接時に前記境界部から立ち昇るプルームが前記外部絶縁部材に向かって立ち昇るのを防止するプルーム規制部を備えることを特徴とする電池。 - 請求項1に記載の電池であって,
前記開口部は,一対の長辺部と一対の短辺部とを有する角形状とされ,
前記電池ケース蓋と前記外部絶縁部材とにより,前記外部絶縁部材における前記長辺部に沿う外周側面の上部よりも内側に入り込む空間が,前記長辺部に沿って形成されており,
前記空間が,前記プルーム規制部を構成する
ことを特徴とする電池。 - 請求項2に記載の電池であって,
前記空間は,前記電池ケース蓋の外周縁部の上面よりも下方に凹んでいるものである
ことを特徴とする電池。 - 請求項1に記載の電池であって,
前記開口部は,一対の長辺部と一対の短辺部とを有する角形状とされ,
前記電池ケース本体は,前記長辺部を有する一対の第1側壁部と,前記短辺部を有する一対の第2側壁部と,を備え,
前記第1側壁部における前記外部絶縁部材を間に位置させる部分の少なくとも上部は,他の部分よりも薄肉の薄肉部とされ,
前記薄肉部が,前記プルーム規制部を構成する
ことを特徴とする電池。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014010897A (ja) * | 2012-06-27 | 2014-01-20 | Toyota Motor Corp | 電池及びその製造方法 |
EP3086382A1 (en) * | 2015-04-21 | 2016-10-26 | Samsung SDI Co., Ltd. | Rechargeable battery |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5969282B2 (ja) | 2012-06-28 | 2016-08-17 | トヨタ自動車株式会社 | 電池およびその製造方法 |
JP6365474B2 (ja) | 2015-09-11 | 2018-08-01 | トヨタ自動車株式会社 | 二次電池の製造方法 |
JP6670132B2 (ja) * | 2016-03-02 | 2020-03-18 | セイコーインスツル株式会社 | 電気化学セル |
KR102357319B1 (ko) * | 2017-02-10 | 2022-01-27 | 삼성에스디아이 주식회사 | 이차 전지 |
JP6872145B2 (ja) * | 2017-05-02 | 2021-05-19 | トヨタ自動車株式会社 | 端子固定構造 |
JP7399922B2 (ja) | 2021-10-18 | 2023-12-18 | プライムプラネットエナジー&ソリューションズ株式会社 | 電池 |
SE2251008A1 (en) * | 2022-08-31 | 2023-09-18 | Northvolt Ab | A cylindrical secondary cell comprising a reduced radius enclosure and a lid |
CN117691269B (zh) * | 2024-01-31 | 2024-04-16 | 蜂巢能源科技股份有限公司 | 一种电芯 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000268781A (ja) * | 1999-03-17 | 2000-09-29 | Sanyo Electric Co Ltd | 密閉式電池用封口板、密閉式電池及びその製造方法 |
JP2010040181A (ja) * | 2008-07-31 | 2010-02-18 | Toyota Motor Corp | 密閉型電池および組電池 |
WO2012043578A1 (ja) * | 2010-09-30 | 2012-04-05 | 株式会社Gsユアサ | 電池及び電池の製造方法 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11213967A (ja) * | 1998-01-28 | 1999-08-06 | Fuji Elelctrochem Co Ltd | 電気化学素子の封口方法 |
JP4743985B2 (ja) * | 2001-03-30 | 2011-08-10 | 三洋電機株式会社 | 電池の製造方法 |
JP2004039445A (ja) * | 2002-07-03 | 2004-02-05 | Toyota Motor Corp | 電池ケース |
JP2005026040A (ja) * | 2003-07-01 | 2005-01-27 | Matsushita Electric Ind Co Ltd | 角形電池とその製造方法 |
KR100709834B1 (ko) * | 2005-04-26 | 2007-04-23 | 삼성에스디아이 주식회사 | 이차 전지 |
JP5246999B2 (ja) * | 2005-12-06 | 2013-07-24 | 三洋電機株式会社 | 密閉型電池の製造方法及び密閉型電池 |
JP5025136B2 (ja) * | 2006-01-31 | 2012-09-12 | 三洋電機株式会社 | 角形密閉電池の製造方法 |
CN101150175B (zh) * | 2006-09-19 | 2010-05-12 | 深圳市比克电池有限公司 | 一种电芯壳体及电芯 |
JP5504007B2 (ja) * | 2010-02-26 | 2014-05-28 | 日立ビークルエナジー株式会社 | 角形電池およびその製造方法 |
JP2011204396A (ja) * | 2010-03-24 | 2011-10-13 | Sanyo Electric Co Ltd | 密閉型電池とその製造方法 |
CN201877474U (zh) * | 2010-12-08 | 2011-06-22 | 北京普莱德新能源电池科技有限公司 | 方形锂离子动力电池结构 |
-
2012
- 2012-06-27 JP JP2012144229A patent/JP5742792B2/ja active Active
-
2013
- 2013-02-20 KR KR1020147035621A patent/KR101605652B1/ko active IP Right Grant
- 2013-02-20 WO PCT/JP2013/054100 patent/WO2014002523A1/ja active Application Filing
- 2013-02-20 CN CN201380033585.0A patent/CN104412410B/zh active Active
- 2013-02-20 US US14/410,193 patent/US10403862B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000268781A (ja) * | 1999-03-17 | 2000-09-29 | Sanyo Electric Co Ltd | 密閉式電池用封口板、密閉式電池及びその製造方法 |
JP2010040181A (ja) * | 2008-07-31 | 2010-02-18 | Toyota Motor Corp | 密閉型電池および組電池 |
WO2012043578A1 (ja) * | 2010-09-30 | 2012-04-05 | 株式会社Gsユアサ | 電池及び電池の製造方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014010897A (ja) * | 2012-06-27 | 2014-01-20 | Toyota Motor Corp | 電池及びその製造方法 |
EP3086382A1 (en) * | 2015-04-21 | 2016-10-26 | Samsung SDI Co., Ltd. | Rechargeable battery |
US10651455B2 (en) | 2015-04-21 | 2020-05-12 | Samsung Sdi Co., Ltd. | Rechargeable battery |
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JP2014010887A (ja) | 2014-01-20 |
CN104412410A (zh) | 2015-03-11 |
US10403862B2 (en) | 2019-09-03 |
KR101605652B1 (ko) | 2016-03-22 |
US20150372261A1 (en) | 2015-12-24 |
CN104412410B (zh) | 2016-10-05 |
KR20150022851A (ko) | 2015-03-04 |
JP5742792B2 (ja) | 2015-07-01 |
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