WO2014068869A1 - Storage battery module - Google Patents

Storage battery module Download PDF

Info

Publication number
WO2014068869A1
WO2014068869A1 PCT/JP2013/006086 JP2013006086W WO2014068869A1 WO 2014068869 A1 WO2014068869 A1 WO 2014068869A1 JP 2013006086 W JP2013006086 W JP 2013006086W WO 2014068869 A1 WO2014068869 A1 WO 2014068869A1
Authority
WO
WIPO (PCT)
Prior art keywords
storage battery
welded
current collector
cylindrical
sealing body
Prior art date
Application number
PCT/JP2013/006086
Other languages
French (fr)
Japanese (ja)
Inventor
敏宏 坂谷
裕政 杉井
越智　誠
龍二 川瀬
Original Assignee
三洋電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Publication of WO2014068869A1 publication Critical patent/WO2014068869A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/24—Alkaline accumulators
    • H01M10/28—Construction or manufacture
    • H01M10/286—Cells or batteries with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • 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
    • H01M10/0422—Cells or battery with cylindrical casing
    • 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
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/526—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material having a layered 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • H01M10/34—Gastight accumulators
    • H01M10/345—Gastight metal hydride accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 storage battery module in which a plurality of cylindrical storage batteries are connected in series.
  • HEV Hybrid Electric Vehicle
  • PHEV plug-in hybrid electric vehicles
  • EV Electric Vehicle
  • lead-acid batteries In vehicles with an idle stop function and a deceleration energy regeneration system that recovers energy during deceleration as electrical energy, there are many nickel-metal hydride batteries and lithium secondary batteries, as well as lead-acid batteries that are widely used as power sources for general vehicles. in use.
  • a large number of nickel-metal hydride storage batteries or lithium secondary batteries are connected in series to form a storage battery module.
  • a plurality of storage battery modules are connected in parallel.
  • a large current can be supplied at a predetermined high voltage.
  • Nickel metal hydride storage batteries and lithium ion secondary batteries are available in either rectangular shapes with a metal outer case or thin plate types with a laminated outer case, but with a cylindrical shape with a metal cylindrical outer case. Is often used. In order to connect a large number of these cylindrical storage batteries in series, the expansion and contraction of each battery during charging and discharging is followed, and the safety valve provided in each battery can be accurately operated at a predetermined pressure. It is necessary to do so. Therefore, various connection methods have been developed in order to connect a large number of cylindrical storage batteries into a module.
  • Patent Document 1 a set in which a connection member is provided so that a constant interval is formed between the tip of the sealing body of one battery and the bottom of the metal outer can of the other battery.
  • a battery invention is disclosed.
  • the connecting member has an outer peripheral side welded to the outer peripheral side of the bottom of the outer can of the other battery, and an inner peripheral side welded to the tip of the sealing body of one battery.
  • the outer peripheral side of the connecting member is welded to the outer peripheral side of the bottom of the outer can of the other battery, the outer diameter increases accordingly.
  • the increase value of the outer shape is small.
  • the size of the connecting member may be made smaller than the outer shape of the storage battery, and the connecting member may be welded to the bottom of the outer can of the other battery.
  • the main cause was that the sputtered metal particles entered the inside of the wound electrode body and caused an internal short circuit.
  • the welded portion is shielded by the resistance welding electrode inserted into the outer can, so that the sputtered metal particles are wound. It is difficult to enter the electrode body. Then, it is considered that sputtered metal particles that cause an internal short circuit are generated when the connection member is welded to the bottom outer surface of the outer can of the storage battery.
  • the storage battery module when welding the connection member to the bottom outer surface of the outer can of the storage battery, the storage battery module is less likely to generate metal particles sputtered inside the storage battery and is less likely to generate an internal short circuit during use. Can be provided.
  • a plurality of cylindrical storage batteries are connected in series with each other via a connecting member,
  • the cylindrical storage battery is A wound electrode body wound in a state where the positive electrode plate and the negative electrode plate are insulated from each other via a separator;
  • a sealing body that is attached in an electrically insulated state to the opening of the cylindrical outer can, and also serves as a terminal of the other electrode,
  • a first current collector is welded to the positive electrode plate at one end of the winding shaft, and a second current collector is welded to the negative electrode at the other end.
  • the first current collector is electrically connected to the sealing body;
  • the second current collector has a flat plate shape with slits formed in the periphery, and the center is welded to the bottom inner surface of the cylindrical outer can,
  • the connecting member has one surface welded to the bottom outer surface of the cylindrical storage battery at a position that does not overlap the slit position of the second current collector, and the other surface of the other cylindrical storage battery.
  • the welding position of the connecting member and the bottom outer surface of the cylindrical storage battery overlaps the position of the slit of the second current collector, the slit edge portion of the second current collector on the current path of the welding current
  • the metal particles are likely to be sputtered where the contact of the inner surface of the bottom is unstable.
  • the welding position of the connecting member and the bottom outer surface of the cylindrical storage battery is different from the slit position of the second current collector, so that the flat plate part of the second current collector and the inner surface of the can part are in contact with each other
  • the energization path of the welding current is stabilized, so that the metal particles are hardly sputtered. Therefore, according to the storage battery module of one embodiment of the present invention, an internal short circuit hardly occurs during use, and a storage battery module with high reliability can be obtained.
  • FIG. 2A is a plan view of the positive electrode lead
  • FIG. 2B is a front view
  • FIG. 3A is a plan view of the positive electrode current collector
  • FIG. 3B is a plan view of a state in which the positive electrode current collector and the positive electrode lead are coupled.
  • It is a top view of a negative electrode collector.
  • FIG. 5A is a plan view of the connection member of the embodiment
  • FIG. 6A is a front view. In the storage battery module of embodiment, it is the front view which showed the connection member in the cross section. It is an expanded sectional view of the VII part of FIG.
  • the cylindrical nickel-metal hydride storage battery 10 used in the storage battery module of the embodiment includes a wound electrode body 14 wound with a nickel positive electrode 11 and a hydrogen storage alloy negative electrode 12 insulated from each other via a separator 13. Have.
  • the nickel positive electrode 11 is mainly composed of nickel hydroxide in a porous nickel sintered body 16 formed on both surfaces of a positive electrode core 15 made of a nickel-plated steel sheet punching metal, and is composed of zinc hydroxide and cobalt hydroxide.
  • the positive electrode active material 17 added from any of the selected compounds is filled.
  • a negative electrode mixture layer 19 having a hydrogen storage alloy powder as a negative electrode active material is formed on both surfaces of a negative electrode core 18 made of a nickel-plated mild steel punching metal.
  • a negative electrode current collector 20 is resistance-welded to the negative electrode core 18 at the lower part of the wound electrode body 14, and a positive electrode current collector 21 is resistance-welded to the positive electrode core 15 at the upper part of the wound electrode body 14. Yes.
  • the wound electrode body 14 is inserted into a metal bottomed cylindrical outer can 22 in which iron is nickel-plated, and the gap between the negative electrode current collector 20 and the bottom of the outer can 22 is a central portion. Spot welded.
  • the detailed configuration of the negative electrode current collector 20 will be described later.
  • a sealing body 23 in which iron is plated with nickel is caulked and fixed with a gasket 24 being electrically insulated from the outer can 22.
  • the positive electrode current collector 21 is integrated by welding a positive electrode current collector lead 25 on the upper surface side, and the positive electrode current collector lead 25 is welded to the sealing body 23 and electrically connected thereto. Detailed configurations of the positive electrode current collector 21 and the positive electrode current collector lead 25 will be described later.
  • An opening 26 is provided at the center of the positive electrode current collector 21, and a valve body 27 is disposed in the opening 26 so as to block the opening 26.
  • a positive electrode cap 28 is provided on the upper surface of the sealing body 23 so as to cover the periphery of the opening 26 and to be separated from the valve body 27 by a certain distance.
  • the positive electrode cap 28 is appropriately provided with a gas vent hole (not shown).
  • a spring 29 is provided between the inner surface of the positive electrode cap 28 and the valve body 27, and the valve body 27 is pressed by the spring 29 so as to close the opening 26 of the sealing body 23.
  • the valve body 27 has a function as a safety valve for releasing the internal pressure when the internal pressure of the outer can 22 becomes high.
  • the positive electrode current collector 21 is formed in a substantially circular shape, and a central opening 21a for inserting a resistance welding electrode is formed at the center, and the end from the periphery of the central opening 21a is formed.
  • a large number of burring holes (for example, a diameter of 2 mm, a burring height of 0.4 mm, and a burring thickness of 0.1 mm) 21 b are formed toward the portion.
  • a pair of slits 21c opened toward the edge and two pairs of semicircular shapes are provided on the outer peripheral portion of the positive electrode current collector 21. Burring hole 21d is formed.
  • the positive electrode current collector lead 25 is formed by pressing so that a nickel-plated steel plate has a predetermined dome shape, and is welded to the positive electrode current collector 21 as shown in FIG. 2A.
  • a flat portion 25a formed in a substantially ring shape, and a head portion 25b that is curved from the flat portion 25a and protrudes in a substantially dome shape and is welded to the sealing body 23.
  • An opening 25c having the same shape is formed.
  • First projection protrusions welded to the positive electrode current collector 21 at substantially equal intervals on the circumference of the substantially center line of the flat portion 25a formed in a substantially ring shape and at positions where the openings 25c are not disposed. 25 d is formed so as to protrude toward the positive electrode current collector 21.
  • a semicircular opening 25e having the same shape as the burring hole 21d is formed in the outer peripheral portion of the flat portion 25a at a position corresponding to the semicircular burring hole 21d formed in the outer peripheral portion of the positive electrode current collector 21.
  • the opening 25c and the burring hole 21b of the positive electrode current collector 21 communicate with each other to perform the function of an electrolyte injection port, and are positioned when the positive current collector lead 25 is disposed on the positive electrode current collector 21. It is provided to facilitate the process.
  • a plurality of slits 25g are radially formed at equal intervals on the top 25b from a position separated from the central opening 25f by a predetermined distance.
  • a central opening 25f is formed at the center of the top 25b, and a plurality of second projection protrusions 25h welded to the sealing body 23 at substantially equal intervals around the central opening 25f are formed on the sealing body 23. It is formed so as to protrude toward the surface.
  • the negative electrode current collector 20 is formed in a substantially circular shape, and has a plurality of projection protrusions protruding toward the inner surface of the bottom of the outer can 22 (see FIG. 1) at the center. 20a is formed.
  • a plurality of slits 20 b that open toward the edge and a position spaced a predetermined distance from the center side in order to reduce the invalid welding current and increase the effective welding current
  • a plurality of slits 20c are formed between the first and second edges.
  • FIG. A method for producing a cylindrical nickel-metal hydride storage battery 10 using the wound electrode body 14, the positive electrode current collector 21 and the positive electrode current collector lead 25, and the negative electrode current collector 20 configured as described above is shown in FIG. Will be described with reference to FIG.
  • the negative electrode current collector 20 is welded to the exposed portion of the negative electrode core 18 of the hydrogen storage alloy negative electrode 12 exposed at the lower end surface of the wound electrode body 14.
  • the positive electrode current collector 21 is welded to the exposed portion of the positive electrode core 15 of the nickel positive electrode 11 exposed at the upper end surface of the wound electrode body 14.
  • the resistance welding electrode is pressed against the upper surface portion of the first projection protrusion 25d, and the positive electrode current collector lead 25 is attached to the positive electrode current collector 21. Spot weld.
  • the positive electrode current collector 21 corresponds to the first current collector in one embodiment of the present invention
  • the negative electrode current collector 20 similarly corresponds to the second current collector.
  • the wound electrode body 14 to which the negative electrode current collector 20, the positive electrode current collector 21, and the positive electrode current collector lead 25 are welded is housed in a bottomed cylindrical outer can 22 in which nickel is plated on iron.
  • a resistance welding electrode is inserted into the space formed at the center of the spirally wound electrode body 14, and abuts on the position where the projection protrusion 20a of the negative electrode current collector 20 is formed, so that the negative electrode current collector 20 is packaged. Spot welding is performed on the inner bottom surface of the can 22.
  • a welding mark X (see FIG. 7) is formed between the inner bottom surface of the outer can 22 and the central portion of the negative electrode current collector 20.
  • grooving is performed on the outer periphery of the upper portion of the outer can 22 to form an annular recess 22 a at the upper end of the outer can 22.
  • an electrolytic solution made of an alkaline aqueous solution containing 7N potassium hydroxide (KOH) is injected into the outer can 22.
  • the sealing body 23 is disposed on the positive electrode current collecting lead 25.
  • a positive electrode cap 28 serving as a positive electrode external terminal is fixed to the sealing body 23, and a valve element 27 is provided in the positive electrode cap 28.
  • An opening 26 for venting gas is formed in the center of the sealing body 23, and a gasket 24 is fitted in advance on the periphery thereof.
  • the nickel hydride storage battery 10 as shown in FIG. 1 is obtained by caulking and sealing the opening edge of the outer can 22 inward.
  • the storage battery module 50 includes a plurality of nickel metal hydride storage batteries 10 ⁇ / b> A, 10 ⁇ / b> B... Connected in series, and each cylindrical nickel metal hydride storage battery 10 ⁇ / b> A, 10 ⁇ / b> B.
  • a connecting member 30 is disposed between them.
  • the connecting member 30 is formed by, for example, pressing so that a nickel-plated steel plate has a predetermined dish shape.
  • a flat portion 30a formed in a substantially ring shape that is welded to the outer surface of the bottom portion, and a bottom portion 30b that is curved from the flat portion 30a and has a dish-like shape and is welded to the upper surface of the sealing body 23. ing.
  • An opening 30c is formed at the center of the bottom 30b, and a plurality of slits 30d are formed at equal intervals so as to extend radially from the opening 30c.
  • the opening 30 c is sized so that the positive electrode cap 28 can protrude so that the outer surface of the bottom 30 b can come into contact with the surface of the sealing body 23 when the bottom 30 b of the connecting member 30 is covered from the surface side of the sealing body 23. Is formed.
  • the height between the flat portion 30a and the bottom portion 30b of the connecting member 30 is larger than the height of the positive electrode cap 28, and charging / discharging is performed on the storage battery module 50, whereby each of the nickel hydrogen storage batteries 10A, 10B... Height that does not contact the bottom outer surface of the cylindrical outer can 22 of the counterpart nickel-metal hydride storage battery 10A, 10B. 7).
  • a plurality of first projection protrusions 30e projecting toward the outer surface of the bottom of the cylindrical outer can 22 are formed on the flat portion 30a, and a plurality of second projections projecting toward the sealing body 23 are formed on the bottom portion 30b.
  • a protrusion 30f is formed.
  • a plurality of semi-circular openings 30g are formed on the outer periphery of the flat portion 30a.
  • the openings 30g and the radially formed slits 30d reduce the reactive current during resistance welding so that the resistance welding current flows in a concentrated manner in the first projection protrusion 30e or the second projection protrusion 30f. Is provided.
  • the slits 30d formed radially are charged and discharged with respect to the storage battery module 50, so that when the nickel hydride storage battery 10 expands and contracts, the bottom 30b is easily deformed.
  • the connecting member 30 has a function of increasing the thickness of the connecting member 30 so that the connecting member 30 can have a low resistance.
  • a method for welding the connecting member 30 will be described. First, the positive electrode cap 28 of the first nickel metal hydride storage battery 10A is inserted into the opening 30c from the dish-shaped bottom side of the connection member 30, and the second projection protrusion 30f of the connection member 30 is brought into contact with the outer surface of the sealing body 23. Let In this state, a resistance welding electrode (not shown) is contacted from the back side of the second projection protrusion 30f, and a predetermined resistance welding current is applied between the sealing body 23 and the resistance welding electrode while applying a predetermined pressing force. And spot welding is performed. As a result, a welding mark Y is formed between the connecting member 30 and the sealing body 23 at the position where the second projection protrusion 30 f is formed.
  • the first projection protrusion 30e formed on the flat portion 30a of the connection member 30 is brought into contact with the outer surface of the bottom of the outer can 22 of the second nickel metal hydride storage battery 10B to be connected in series. Then, while applying a predetermined pressing force between the first nickel metal hydride storage battery 10A and the second nickel metal hydride storage battery 10B, the sealing body 23 of the first nickel metal hydride storage battery and the exterior of the second nickel metal hydride storage battery 10B A predetermined resistance welding current is applied to the can 22 to perform spot welding.
  • an insulating member is disposed between them.
  • a welding mark Z is formed between the outer surface of the bottom of the outer can 22 of the second nickel metal hydride storage battery 10B and the connection member 30 at the position where the first projection protrusion 30e is formed.
  • this welding mark Z does not overlap with the position of the slits (20b, 20c) of the negative electrode current collector 20 of the nickel hydrogen battery 10B, there is a place where the contact is unstable on the energized current path at the time of welding the connecting parts. Even if a large current flows without being present, sputtered metal particles are hardly generated, and an internal short circuit of the wound electrode body 14 disposed in the outer can 22 of the second nickel metal hydride storage battery 10B is less likely to occur. . By repeating such an operation, a predetermined number of nickel-metal hydride storage batteries can be connected in series.
  • the present invention can also be applied to a case where the outer can side is a positive electrode.
  • cylindrical nickel hydride storage battery such as a cylindrical lithium ion secondary battery and a cylindrical nickel cadmium storage battery. Even if applied, the same effects can be obtained.

Abstract

Provided is a highly reliable storage battery module wherein internal shorts do not readily occur during use. This storage battery module (50) has a plurality of cylindrical storage batteries (10A, 10B) connected in series via a connection member (30). A winding electrode body (14) has a first collector welded to either a positive electrode plate or a negative electrode plate, at one end of the winding axis, and a second collector (20) welded to the other of either the positive electrode plate or the negative electrode plate, at the other end of the winding axis. The first collector is electrically connected to a sealing body. The second collector (20) has a planar shape having a slit formed in the periphery thereof, and has a center section welded to the inside surface of the floor section of a cylindrical exterior canister (22). The connection member (30) has one surface thereof welded to the outside surface of the floor section of the cylindrical storage battery (10B), at a position that does not overlap with the position of the second collector (20) slit. The other surface of the connection member (30) is welded to the sealing body in the other cylindrical storage battery (10A).

Description

蓄電池モジュールBattery module
　本発明は、複数の円筒状の蓄電池を直列に接続した蓄電池モジュールに関する。 The present invention relates to a storage battery module in which a plurality of cylindrical storage batteries are connected in series.
　ハイブリッド電気自動車（ＨＥＶ：Hybrid Electric Vehicle）、プラグインハイブリッド電気自動車（ＰＨＥＶ：Plug-in Hybrid Electric Vehicle）、電気自動車（ＥＶ：Electric Vehicle）等の大電流充放電を必要とする用途、又は鉛蓄電池をアイドルストップ機能や減速時のエネルギーを電気エネルギーとして回収する減速エネルギー回生システムを有する車両では、一般的な車両用の電源として汎用されている鉛蓄電池と共に、ニッケル水素蓄電池やリチウム二次電池が多く使用されている。これらの用途は、大電力用のモーターを駆動するため、ニッケル水素蓄電池やリチウム二次電池を多数個直列に接続して蓄電池モジュールを形成し、場合によってはさらにこの蓄電池モジュールを複数個並列に接続し、所定の高電圧で大電流を供給することができるようにしている。 Applications requiring high current charge / discharge, such as hybrid electric vehicles (HEV: Hybrid Electric Vehicle), plug-in hybrid electric vehicles (PHEV), electric vehicles (EV: Electric Vehicle), or lead-acid batteries In vehicles with an idle stop function and a deceleration energy regeneration system that recovers energy during deceleration as electrical energy, there are many nickel-metal hydride batteries and lithium secondary batteries, as well as lead-acid batteries that are widely used as power sources for general vehicles. in use. In these applications, in order to drive a high-power motor, a large number of nickel-metal hydride storage batteries or lithium secondary batteries are connected in series to form a storage battery module. In some cases, a plurality of storage battery modules are connected in parallel. In addition, a large current can be supplied at a predetermined high voltage.
　ニッケル水素蓄電池やリチウムイオン二次電池は、金属製の外装体を備える角形のものやラミネート外装体を備える薄板状のものも存在するが、金属製の円筒状外装体を備えた円筒状のものが多く使用されている。これらの円筒状の蓄電池を多数個直列に接続するには、充放電時のそれぞれの電池の膨張・収縮に追従し、さらにそれぞれの電池に設けられている安全弁が所定の圧力で正確に作動できるようにする必要がある。そのため、円筒状の蓄電池を多数個接続してモジュール化するために、種々の接続方法が開発されている。 Nickel metal hydride storage batteries and lithium ion secondary batteries are available in either rectangular shapes with a metal outer case or thin plate types with a laminated outer case, but with a cylindrical shape with a metal cylindrical outer case. Is often used. In order to connect a large number of these cylindrical storage batteries in series, the expansion and contraction of each battery during charging and discharging is followed, and the safety valve provided in each battery can be accurately operated at a predetermined pressure. It is necessary to do so. Therefore, various connection methods have been developed in order to connect a large number of cylindrical storage batteries into a module.
　例えば、下記特許文献１には、一方の電池の封口体の先端部と他方の電池の金属製の外装缶の底部との間に一定の間隔が形成されるように、接続部材を設けた組電池の発明が開示されている。この接続部材は、外周側が他方の電池の外装缶の底部外周側に溶接されているとともに、内周側が一方の電池の封口体の先端に溶接されている。これにより、一方の電池の封口体の先端が他方の電池の外装缶の底部に接触しないようになされているとともに、一方の電池と他方の電池とが直列に接続されている状態となされている。 For example, in the following Patent Document 1, a set in which a connection member is provided so that a constant interval is formed between the tip of the sealing body of one battery and the bottom of the metal outer can of the other battery. A battery invention is disclosed. The connecting member has an outer peripheral side welded to the outer peripheral side of the bottom of the outer can of the other battery, and an inner peripheral side welded to the tip of the sealing body of one battery. Thereby, while making the front-end | tip of the sealing body of one battery not contact the bottom part of the exterior can of the other battery, it is set as the state by which one battery and the other battery are connected in series. .
特開２００６－０９２８２８号公報JP 2006-092828 A
　上記特許文献１に開示されている組電池では、接続部材の外周側が他方の電池の外装缶の底部外周側に溶接されているので、その分だけ外径が増大する。個々の蓄電池でみれば外形の増大値は小さいが、これらの用途では、多数の電池が組み合わされて蓄電池モジュールが形成されているため、無視できない大きさとなる。このような外形の増大化を抑制するには、接続部材のサイズを蓄電池の外形よりも小さくして、接続部材を他方の電池の外装缶の底部に溶接すればよい。 In the assembled battery disclosed in Patent Document 1, since the outer peripheral side of the connecting member is welded to the outer peripheral side of the bottom of the outer can of the other battery, the outer diameter increases accordingly. In terms of individual storage batteries, the increase value of the outer shape is small. However, in these applications, since a storage battery module is formed by combining a number of batteries, it becomes a size that cannot be ignored. In order to suppress such an increase in the outer shape, the size of the connecting member may be made smaller than the outer shape of the storage battery, and the connecting member may be welded to the bottom of the outer can of the other battery.
　しかしながら、単純に接続部材を他方の電池の外装缶の底部外面に溶接することによって蓄電池モジュールを形成すると、使用中に蓄電池モジュールの電圧が低下しているものが見出された。蓄電池の市場のおける不具合の多くは、電池電圧が低下するいわゆるショートによるものであり、これらの用途などに用いられる多数の蓄電池を直列接続した蓄電池モジュールでは、１セルの蓄電池のショートでも高額な交換費用が必要となる。個々の蓄電池の出荷時には品質チェックが入念に行なわれているが、出荷時の検査のみでは軽微なショートが発生した蓄電池を拭いきることは困難であり、蓄電池モジュールが市場で使用されている間にショートに至ることが大半であった。そのため、多数の蓄電池を直列接続した蓄電池モジュールにおいて、蓄電池のショートに対する本質的な対策が望まれている。 However, when the storage battery module was formed by simply welding the connecting member to the bottom outer surface of the outer can of the other battery, it was found that the voltage of the storage battery module was lowered during use. Many of the problems in the storage battery market are due to so-called short-circuits where the battery voltage drops. In storage battery modules in which a large number of storage batteries used in these applications are connected in series, even if one battery is short-circuited, expensive replacement Cost is required. Although quality checks are carefully conducted at the time of shipment of individual storage batteries, it is difficult to wipe off storage batteries that have undergone minor short-circuits only by inspection at the time of shipment, and while storage battery modules are being used in the market. Most of them were short-circuited. Therefore, in a storage battery module in which a large number of storage batteries are connected in series, an essential measure against a short circuit of the storage battery is desired.
　発明者等が蓄電池モジュールのショートを起こした蓄電池を分解して調べたところ、スパッタされた金属粒子が巻回電極体の内部に侵入して内部短絡を起こしていることが主原因であることが分かった。外装缶の底部内面に巻回電極体の集電体を溶接する際には、溶接部は外装缶の内部に挿入される抵抗溶接用電極によって遮蔽されるため、スパッタされた金属粒子は巻回電極体の内部に侵入し難い。そうすると、内部短絡を起こす原因となるスパッタされた金属粒子は、接続部材を蓄電池の外装缶の底部外面に溶接する際に生成するものと考えられる。 When the inventors disassembled and examined the storage battery that caused the short circuit of the storage battery module, the main cause was that the sputtered metal particles entered the inside of the wound electrode body and caused an internal short circuit. I understood. When welding the current collector of the wound electrode body to the bottom inner surface of the outer can, the welded portion is shielded by the resistance welding electrode inserted into the outer can, so that the sputtered metal particles are wound. It is difficult to enter the electrode body. Then, it is considered that sputtered metal particles that cause an internal short circuit are generated when the connection member is welded to the bottom outer surface of the outer can of the storage battery.
　本発明の一態様によれば、接続部材を蓄電池の外装缶の底部外面に溶接する際に、蓄電池の内部でスパッタされた金属粒子が発生し難く、使用時に内部短絡が生成し難い蓄電池モジュールを提供することができる。 According to one aspect of the present invention, when welding the connection member to the bottom outer surface of the outer can of the storage battery, the storage battery module is less likely to generate metal particles sputtered inside the storage battery and is less likely to generate an internal short circuit during use. Can be provided.
　本発明の一態様によれば、
　複数の円筒形蓄電池が接続部材を介して互いに直列に接続され、
　前記円筒形蓄電池は、
　正極板と負極板とがセパレータを介して互いに絶縁された状態で巻き回された巻回電極体と、
　前記巻回電極体及び電解液を収納する、一方極の端子を兼ねる金属製の円筒状外装缶と、
　前記円筒状外装缶の開口部に電気的に絶縁された状態で取り付けられた、他方極の端子を兼ねる封口体とを備え、
　前記巻回電極体には、巻回軸の一方側の端部に第１の集電体が正極板に溶接され、他方側の端部に第２の集電体が負極板に溶接され、
　前記第１の集電体は前記封口体に電気的に接続され、
　前記第２の集電体は、周辺にスリットが形成された平板状であり、中心部が前記円筒状外装缶の底部内面に溶接されており、
　前記接続部材は、一方の面が前記円筒形蓄電池の底部外面に、前記第２の集電体のスリット位置とは重ならない位置で溶接されており、他方の面が前記他の円筒形蓄電池の前記封口体に溶接されている、
蓄電池モジュール、が提供される。 According to one aspect of the invention,
A plurality of cylindrical storage batteries are connected in series with each other via a connecting member,
The cylindrical storage battery is
A wound electrode body wound in a state where the positive electrode plate and the negative electrode plate are insulated from each other via a separator;
A cylindrical outer can made of metal that also serves as a terminal of one electrode, containing the wound electrode body and the electrolyte,
A sealing body that is attached in an electrically insulated state to the opening of the cylindrical outer can, and also serves as a terminal of the other electrode,
In the wound electrode body, a first current collector is welded to the positive electrode plate at one end of the winding shaft, and a second current collector is welded to the negative electrode at the other end.
The first current collector is electrically connected to the sealing body;
The second current collector has a flat plate shape with slits formed in the periphery, and the center is welded to the bottom inner surface of the cylindrical outer can,
The connecting member has one surface welded to the bottom outer surface of the cylindrical storage battery at a position that does not overlap the slit position of the second current collector, and the other surface of the other cylindrical storage battery. Welded to the sealing body,
A storage battery module is provided.
　接続部材と円筒形蓄電池の底部外面への溶接位置が、第２の集電体のスリットの位置と重なっていると、溶接電流の通電経路上に、第２の集電体のスリットエッジ部と、底部内面の接触が不安定な箇所で、金属粒子がスパッタされやすくなる。それに対して、接続部材と円筒形蓄電池の底部外面への溶接位置が、第２の集電体のスリット位置が異なることで、第２の集電体の平板部と、缶部内面が接触状態となり、溶接電流の通電経路が安定するため、金属粒子がスパッタされ難くなる。そのため、本発明の一態様の蓄電池モジュールによれば、使用時に内部短絡が発生し難く、信頼性が高い蓄電池モジュールが得られる。 When the welding position of the connecting member and the bottom outer surface of the cylindrical storage battery overlaps the position of the slit of the second current collector, the slit edge portion of the second current collector on the current path of the welding current The metal particles are likely to be sputtered where the contact of the inner surface of the bottom is unstable. On the other hand, the welding position of the connecting member and the bottom outer surface of the cylindrical storage battery is different from the slit position of the second current collector, so that the flat plate part of the second current collector and the inner surface of the can part are in contact with each other Thus, the energization path of the welding current is stabilized, so that the metal particles are hardly sputtered. Therefore, according to the storage battery module of one embodiment of the present invention, an internal short circuit hardly occurs during use, and a storage battery module with high reliability can be obtained.
実施形態の蓄電池モジュールで使用した円筒状のニッケル水素蓄電池の縦断面図である。It is a longitudinal cross-sectional view of the cylindrical nickel-metal hydride storage battery used with the storage battery module of embodiment. 図２Ａは正極リードの平面図であり、図２Ｂは正面図である。2A is a plan view of the positive electrode lead, and FIG. 2B is a front view. 図３Ａは正極集電体の平面図であり、図３Ｂは正極集電体と正極リードとを結合した状態の平面図である。FIG. 3A is a plan view of the positive electrode current collector, and FIG. 3B is a plan view of a state in which the positive electrode current collector and the positive electrode lead are coupled. 負極集電体の平面図である。It is a top view of a negative electrode collector. 図５Ａは実施形態の接続部材の平面図であり、図６Ａは正面図である。FIG. 5A is a plan view of the connection member of the embodiment, and FIG. 6A is a front view. 実施形態の蓄電池モジュールにおいて、接続部材を断面で示した正面図である。In the storage battery module of embodiment, it is the front view which showed the connection member in the cross section. 図６のVII部分の拡大断面図である。It is an expanded sectional view of the VII part of FIG.
　以下、本発明を実施するための形態について詳細に説明する。ただし、以下に示す実施形態は、本発明の技術思想を理解するために例示するものであって、本発明をこの実施形態に特定することを意図するものではなく、本発明は特許請求の範囲に示した技術思想を逸脱することなく種々の変更を行ったものにも均しく適用し得るものである。 Hereinafter, embodiments for carrying out the present invention will be described in detail. However, the following embodiment is illustrated for the purpose of understanding the technical idea of the present invention, and is not intended to specify the present invention as the embodiment, and the present invention is not limited to the scope of the claims. The present invention can equally be applied to those in which various modifications are made without departing from the technical idea shown in.
［ニッケル水素蓄電池］
　実施形態の蓄電池モジュールで使用した円筒状のニッケル水素蓄電池１０は、ニッケル正極１１と、水素吸蔵合金負極１２とがセパレータ１３を介して互いに絶縁された状態で巻き回された巻回電極体１４を有している。 [Nickel metal hydride storage battery]
The cylindrical nickel-metal hydride storage battery 10 used in the storage battery module of the embodiment includes a wound electrode body 14 wound with a nickel positive electrode 11 and a hydrogen storage alloy negative electrode 12 insulated from each other via a separator 13. Have.
　ニッケル正極１１は、ニッケルめっき鋼板製のパンチングメタルからなる正極芯体１５の両面に形成された多孔質ニッケル焼結体１６内に、水酸化ニッケルを主成分とし、水酸化亜鉛、水酸化コバルトから選択したいずれかの化合物から添加された正極活物質１７が充填された構成を有している。水素吸蔵合金負極１２は、ニッケルめっきした軟鋼材製のパンチングメタルからなる負極芯体１８の両面に負極活物質としての水素吸蔵合金粉末を有する負極合剤層１９が形成されている。 The nickel positive electrode 11 is mainly composed of nickel hydroxide in a porous nickel sintered body 16 formed on both surfaces of a positive electrode core 15 made of a nickel-plated steel sheet punching metal, and is composed of zinc hydroxide and cobalt hydroxide. The positive electrode active material 17 added from any of the selected compounds is filled. In the hydrogen storage alloy negative electrode 12, a negative electrode mixture layer 19 having a hydrogen storage alloy powder as a negative electrode active material is formed on both surfaces of a negative electrode core 18 made of a nickel-plated mild steel punching metal.
　巻回電極体１４の下部には負極芯体１８に負極集電体２０が抵抗溶接されており、巻回電極体１４の上部には正極芯体１５に正極集電体２１が抵抗溶接されている。巻回電極体１４は、鉄にニッケルめっきを施した金属製の有底円筒状の外装缶２２内に挿入されており、負極集電体２０と外装缶２２の底部との間は中央部でスポット溶接されている。負極集電体２０の詳細な構成については後述する。 A negative electrode current collector 20 is resistance-welded to the negative electrode core 18 at the lower part of the wound electrode body 14, and a positive electrode current collector 21 is resistance-welded to the positive electrode core 15 at the upper part of the wound electrode body 14. Yes. The wound electrode body 14 is inserted into a metal bottomed cylindrical outer can 22 in which iron is nickel-plated, and the gap between the negative electrode current collector 20 and the bottom of the outer can 22 is a central portion. Spot welded. The detailed configuration of the negative electrode current collector 20 will be described later.
　外装缶２２の開放端側には、鉄にニッケルめっきを施した封口体２３が、ガスケット２４を介して外装缶２２とは電気的に絶縁された状態で、カシメ固定されている。正極集電体２１は、上面側に正極集電リード２５が溶接されて一体化されており、正極集電リード２５が封口体２３に溶接されて電気的に接続されている。正極集電体２１及び正極集電リード２５の詳細な構成については後述する。正極集電体２１の中央部には開口２６が設けられており、この開口２６には弁体２７が開口２６を塞ぐように配置されている。 On the open end side of the outer can 22, a sealing body 23 in which iron is plated with nickel is caulked and fixed with a gasket 24 being electrically insulated from the outer can 22. The positive electrode current collector 21 is integrated by welding a positive electrode current collector lead 25 on the upper surface side, and the positive electrode current collector lead 25 is welded to the sealing body 23 and electrically connected thereto. Detailed configurations of the positive electrode current collector 21 and the positive electrode current collector lead 25 will be described later. An opening 26 is provided at the center of the positive electrode current collector 21, and a valve body 27 is disposed in the opening 26 so as to block the opening 26.
　また、封口体２３の上面には、開口２６の周囲を覆い、かつ、弁体２７とは一定距離だけ隔てた状態となるように、正極キャップ２８が設けられている。正極キャップ２８には、適宜ガス抜き孔（図示省略）が設けられている。正極キャップ２８の内面と弁体２７との間にはバネ２９が設けられており、弁体２７はバネ２９によって封口体２３の開口２６を塞ぐように押圧されている。この弁体２７は外装缶２２の内部の圧力が高くなった際に、内部の圧力を逃がす安全弁としての機能を有している。 Further, a positive electrode cap 28 is provided on the upper surface of the sealing body 23 so as to cover the periphery of the opening 26 and to be separated from the valve body 27 by a certain distance. The positive electrode cap 28 is appropriately provided with a gas vent hole (not shown). A spring 29 is provided between the inner surface of the positive electrode cap 28 and the valve body 27, and the valve body 27 is pressed by the spring 29 so as to close the opening 26 of the sealing body 23. The valve body 27 has a function as a safety valve for releasing the internal pressure when the internal pressure of the outer can 22 becomes high.
［正極集電体及び正極集電リード］
　正極集電体２１は、図３Ａに示すように、略円形に形成されており、中心部に抵抗溶接用電極挿入用の中心開口２１ａが形成されているとともに、この中心開口２１ａの周囲から端部に向けて多数のバーリング孔（例えば、直径２ｍｍ、バーリング高さ０．４ｍｍ、バーリング厚み０．１ｍｍ）２１ｂが形成されている。また、正極集電体２１の外周部には、無効な溶接電流を減少させ、有効な溶接電流を増大させるために、端縁に向けて開口する一対のスリット２１ｃと、２対の半円形状のバーリング孔２１ｄが形成されている。 [Positive electrode current collector and positive electrode current collecting lead]
As shown in FIG. 3A, the positive electrode current collector 21 is formed in a substantially circular shape, and a central opening 21a for inserting a resistance welding electrode is formed at the center, and the end from the periphery of the central opening 21a is formed. A large number of burring holes (for example, a diameter of 2 mm, a burring height of 0.4 mm, and a burring thickness of 0.1 mm) 21 b are formed toward the portion. Moreover, in order to reduce an ineffective welding current and to increase an effective welding current, a pair of slits 21c opened toward the edge and two pairs of semicircular shapes are provided on the outer peripheral portion of the positive electrode current collector 21. Burring hole 21d is formed.
　正極集電リード２５はニッケルめっきが施された鋼板が所定のドーム形状になるように、プレス加工することにより形成されたものであり、図２Ａに示すように、正極集電体２１に溶接される略リング状に形成された平面部２５ａと、この平面部２５ａより湾曲して略ドーム状に突出して形成され、封口体２３に溶接される頭頂部２５ｂとを備えている。略リング状に形成された平面部２５ａの略中心線の円周上で、かつ図３Ａに示した正極集電体２１に形成された円形のバーリング孔２１ｂに一致する位置に、バーリング孔２１ｂと同形状の開孔２５ｃが形成されている。略リング状に形成された平面部２５ａの略中心線の円周上で、かつ開孔２５ｃが配置されていない位置には、略等間隔に正極集電体２１に溶接される第１プロジェクション突起２５ｄが正極集電体２１に向けて突出するように形成されている。 The positive electrode current collector lead 25 is formed by pressing so that a nickel-plated steel plate has a predetermined dome shape, and is welded to the positive electrode current collector 21 as shown in FIG. 2A. A flat portion 25a formed in a substantially ring shape, and a head portion 25b that is curved from the flat portion 25a and protrudes in a substantially dome shape and is welded to the sealing body 23. The burring hole 21b and the circular burring hole 21b formed on the positive electrode current collector 21 shown in FIG. 3A on the circumference of the substantially center line of the flat portion 25a formed in a substantially ring shape An opening 25c having the same shape is formed. First projection protrusions welded to the positive electrode current collector 21 at substantially equal intervals on the circumference of the substantially center line of the flat portion 25a formed in a substantially ring shape and at positions where the openings 25c are not disposed. 25 d is formed so as to protrude toward the positive electrode current collector 21.
　平面部２５ａの外周部には、正極集電体２１の外周部に形成された半円形状のバーリング孔２１ｄに一致する位置に、バーリング孔２１ｄと同形状の半円形状の開孔２５ｅが形成されている。この開孔２５ｃと正極集電体２１のバーリング孔２１ｂとは、互いに連通して電解液の注液口の機能を奏するとともに、正極集電リード２５を正極集電体２１に配置する際の位置決めを容易にするために設けられるものである。 A semicircular opening 25e having the same shape as the burring hole 21d is formed in the outer peripheral portion of the flat portion 25a at a position corresponding to the semicircular burring hole 21d formed in the outer peripheral portion of the positive electrode current collector 21. Has been. The opening 25c and the burring hole 21b of the positive electrode current collector 21 communicate with each other to perform the function of an electrolyte injection port, and are positioned when the positive current collector lead 25 is disposed on the positive electrode current collector 21. It is provided to facilitate the process.
　また、頭頂部２５ｂには、中心開口２５ｆから所定の距離だけ離間した位置から放射状に複数のスリット２５ｇが等間隔に形成されている。また、頭頂部２５ｂの中心部には中心開口２５ｆが形成されているとともに、この中心開口２５ｆの周囲に略等間隔に封口体２３に溶接される複数の第２プロジェクション突起２５ｈが封口体２３に向けて突出するように形成されている。これらの複数のスリット２５ｇを形成すると、電池の封口時の封口体２３からの押圧力によりドーム状の頭頂部２５ｂが変形しやすくなるので、正極集電リード２５の板厚を厚くして低抵抗の正極集電リード２５とすることが可能となる。 Further, a plurality of slits 25g are radially formed at equal intervals on the top 25b from a position separated from the central opening 25f by a predetermined distance. A central opening 25f is formed at the center of the top 25b, and a plurality of second projection protrusions 25h welded to the sealing body 23 at substantially equal intervals around the central opening 25f are formed on the sealing body 23. It is formed so as to protrude toward the surface. When the plurality of slits 25g are formed, the dome-shaped top 25b is easily deformed by the pressing force from the sealing body 23 when the battery is sealed, so that the thickness of the positive electrode current collecting lead 25 is increased to reduce the resistance. The positive electrode current collecting lead 25 can be obtained.
［負極集電体］
　また、負極集電体２０は、図４に示したように、略円形に形成されており、中心部に外装缶２２（図１参照）の底部内面側に向かって突出する複数個のプロジェクション突起２０ａが形成されている。負極集電体２０の外周部には、無効な溶接電流を減少させ、有効な溶接電流を増大させるために、端縁に向けて開口する複数のスリット２０ｂと、中心側から所定距離離間した位置から端縁との間に開口する複数のスリット２０ｃとが形成されている。 [Negative electrode current collector]
Further, as shown in FIG. 4, the negative electrode current collector 20 is formed in a substantially circular shape, and has a plurality of projection protrusions protruding toward the inner surface of the bottom of the outer can 22 (see FIG. 1) at the center. 20a is formed. In the outer periphery of the negative electrode current collector 20, a plurality of slits 20 b that open toward the edge and a position spaced a predetermined distance from the center side in order to reduce the invalid welding current and increase the effective welding current A plurality of slits 20c are formed between the first and second edges.
［ニッケル水素蓄電池の組み立て］
　上述のような構成の巻回電極体１４と、正極集電体２１及び正極集電リード２５と、負極集電体２０とを用いて、円筒状のニッケル水素蓄電池１０を作製する方法について図１を参照しながら説明する。まず、巻回電極体１４の下端面に露出する水素吸蔵合金負極１２の負極芯体１８の露出部に負極集電体２０を溶接する。また、巻回電極体１４の上端面に露出するニッケル正極１１の正極芯体１５の露出部に正極集電体２１を溶接する。その後、正極集電体２１の上に正極集電リード２５を配置した後、第１プロジェクション突起２５ｄの上面部に抵抗溶接用電極を押し当てて、正極集電体２１に正極集電リード２５をスポット溶接する。ここでは、正極集電体２１が本発明の一態様における第１の集電体に対応し、同じく負極集電体２０が第２の集電体に対応する。 [Assembly of NiMH battery]
A method for producing a cylindrical nickel-metal hydride storage battery 10 using the wound electrode body 14, the positive electrode current collector 21 and the positive electrode current collector lead 25, and the negative electrode current collector 20 configured as described above is shown in FIG. Will be described with reference to FIG. First, the negative electrode current collector 20 is welded to the exposed portion of the negative electrode core 18 of the hydrogen storage alloy negative electrode 12 exposed at the lower end surface of the wound electrode body 14. Further, the positive electrode current collector 21 is welded to the exposed portion of the positive electrode core 15 of the nickel positive electrode 11 exposed at the upper end surface of the wound electrode body 14. Thereafter, after the positive electrode current collector lead 25 is disposed on the positive electrode current collector 21, the resistance welding electrode is pressed against the upper surface portion of the first projection protrusion 25d, and the positive electrode current collector lead 25 is attached to the positive electrode current collector 21. Spot weld. Here, the positive electrode current collector 21 corresponds to the first current collector in one embodiment of the present invention, and the negative electrode current collector 20 similarly corresponds to the second current collector.
　この後、負極集電体２０、正極集電体２１及び正極集電リード２５が溶接された巻回電極体１４を鉄にニッケルめっきを施した有底筒状の外装缶２２内に収納する。そして、巻回電極体１４の中心部に形成された空間部に抵抗溶接用電極を挿入し、負極集電体２０のプロジェクション突起２０ａが形成された位置に当接し、負極集電体２０を外装缶２２の内底面にスポット溶接する。これにより負極集電体２０の中央部には、外装缶２２の内底面との間に溶接痕Ｘ（図７参照）が形成される。 Thereafter, the wound electrode body 14 to which the negative electrode current collector 20, the positive electrode current collector 21, and the positive electrode current collector lead 25 are welded is housed in a bottomed cylindrical outer can 22 in which nickel is plated on iron. Then, a resistance welding electrode is inserted into the space formed at the center of the spirally wound electrode body 14, and abuts on the position where the projection protrusion 20a of the negative electrode current collector 20 is formed, so that the negative electrode current collector 20 is packaged. Spot welding is performed on the inner bottom surface of the can 22. As a result, a welding mark X (see FIG. 7) is formed between the inner bottom surface of the outer can 22 and the central portion of the negative electrode current collector 20.
　次いで、外装缶２２の上部外周側に溝入れ加工を施し、外装缶２２の上端部に環状凹部２２ａを形成する。この後、外装缶２２内に７Ｎの水酸化カリウム（ＫＯＨ）を含むアルカリ水溶液からなる電解液を注入する。この後、正極集電リード２５上に封口体２３を配置する。ここで、封口体２３には、正極外部端子となる正極キャップ２８が固定されており、正極キャップ２８内には弁体２７とが設けられている。封口体２３の中央にはガス抜き用の開口２６が形成されているとともに、その周縁には予めガスケット２４が嵌着されている。 Next, grooving is performed on the outer periphery of the upper portion of the outer can 22 to form an annular recess 22 a at the upper end of the outer can 22. Thereafter, an electrolytic solution made of an alkaline aqueous solution containing 7N potassium hydroxide (KOH) is injected into the outer can 22. Thereafter, the sealing body 23 is disposed on the positive electrode current collecting lead 25. Here, a positive electrode cap 28 serving as a positive electrode external terminal is fixed to the sealing body 23, and a valve element 27 is provided in the positive electrode cap 28. An opening 26 for venting gas is formed in the center of the sealing body 23, and a gasket 24 is fitted in advance on the periphery thereof.
　次いで、封口体２３の上部と外装缶２２の下部に一対の溶接電極を配置した後、一対の溶接電極間に予め定めた圧力を負荷しながら抵抗溶接を行う。これにより、正極集電リード２５の頭頂部２５ｂに形成された第２プロジェクション突起２５ｈが溶接点となって、封口体２３が正極集電リード２５に溶接される。この後、外装缶２２の開口端縁を内方にかしめて封口することにより、図１に示すようなニッケル水素蓄電池１０が得られる。 Then, after arranging a pair of welding electrodes on the upper part of the sealing body 23 and the lower part of the outer can 22, resistance welding is performed while applying a predetermined pressure between the pair of welding electrodes. As a result, the second projection protrusion 25 h formed on the top 25 b of the positive current collecting lead 25 serves as a welding point, and the sealing body 23 is welded to the positive current collecting lead 25. Then, the nickel hydride storage battery 10 as shown in FIG. 1 is obtained by caulking and sealing the opening edge of the outer can 22 inward.
［蓄電池モジュールの作製］
　次に上述の円筒状のニッケル水素蓄電池を複数個直列に接続した蓄電池モジュールについて図５～図７を用いて説明する。この蓄電池モジュール５０は、例えば図６に示したように、複数個のニッケル水素蓄電池１０Ａ、１０Ｂ・・・が直列接続されたものであり、それぞれの円筒状のニッケル水素蓄電池１０Ａ、１０Ｂ・・・の間には接続部材３０が配置されている。 [Production of storage battery module]
Next, a storage battery module in which a plurality of cylindrical nickel-metal hydride storage batteries connected in series will be described with reference to FIGS. As shown in FIG. 6, for example, the storage battery module 50 includes a plurality of nickel metal hydride storage batteries 10 </ b> A, 10 </ b> B... Connected in series, and each cylindrical nickel metal hydride storage battery 10 </ b> A, 10 </ b> B. A connecting member 30 is disposed between them.
　接続部材３０は、図５に示したように、例えばニッケルめっきが施された鋼板が所定の皿状になるように、プレス加工することにより形成されたものであり、円筒状の外装缶２２の底部外面に溶接される略リング状に形成された平面部３０ａと、この平面部３０ａより湾曲して皿状に窪んだ形状を有し、封口体２３の上面に溶接される底部３０ｂとを備えている。底部３０ｂの中央部には開口３０ｃが形成されており、この開口３０ｃからは放射状に部分的に延在するように複数のスリット３０ｄが等間隔に形成されている。 As shown in FIG. 5, the connecting member 30 is formed by, for example, pressing so that a nickel-plated steel plate has a predetermined dish shape. A flat portion 30a formed in a substantially ring shape that is welded to the outer surface of the bottom portion, and a bottom portion 30b that is curved from the flat portion 30a and has a dish-like shape and is welded to the upper surface of the sealing body 23. ing. An opening 30c is formed at the center of the bottom 30b, and a plurality of slits 30d are formed at equal intervals so as to extend radially from the opening 30c.
　開口３０ｃは、接続部材３０の底部３０ｂを封口体２３の表面側からかぶせた際に、底部３０ｂの外面が封口体２３の表面に接触することができるように、正極キャップ２８が突出できる大きさに形成されているものである。接続部材３０の平面部３０ａと底部３０ｂとの間の高さは、正極キャップ２８の高さよりも大きく、かつ、蓄電池モジュール５０に対して充放電が行われることにより、それぞれのニッケル水素蓄電池１０Ａ、１０Ｂ・・・に膨張・収縮が生じても、正極キャップ２８の先端が直列接続される相手方のニッケル水素蓄電池１０Ａ、１０Ｂ・・・の円筒状の外装缶２２の底部外面に接触しない高さ（図７参照）とされている。 The opening 30 c is sized so that the positive electrode cap 28 can protrude so that the outer surface of the bottom 30 b can come into contact with the surface of the sealing body 23 when the bottom 30 b of the connecting member 30 is covered from the surface side of the sealing body 23. Is formed. The height between the flat portion 30a and the bottom portion 30b of the connecting member 30 is larger than the height of the positive electrode cap 28, and charging / discharging is performed on the storage battery module 50, whereby each of the nickel hydrogen storage batteries 10A, 10B... Height that does not contact the bottom outer surface of the cylindrical outer can 22 of the counterpart nickel-metal hydride storage battery 10A, 10B. 7).
　平坦部３０ａには円筒状の外装缶２２の底部外面に向かって突出する複数の第１プロジェクション突起３０ｅが形成されており、底部３０ｂには封口体２３側に向かって突出する複数の第２プロジェクション突起３０ｆが形成されている。 A plurality of first projection protrusions 30e projecting toward the outer surface of the bottom of the cylindrical outer can 22 are formed on the flat portion 30a, and a plurality of second projections projecting toward the sealing body 23 are formed on the bottom portion 30b. A protrusion 30f is formed.
　平面部３０ａの外周部には、正複数個の半円形状の開孔３０ｇが形成されている。この開孔３０ｇ及び放射状に形成されたスリット３０ｄは、抵抗溶接時の無効電流を減らして、抵抗溶接用電流が第１プロジェクション突起３０ｅないし第２プロジェクション突起３０ｆに集中して流れるようにするために設けられている。また、放射状に形成されたスリット３０ｄは、蓄電池モジュール５０に対して充放電が行われることにより、それぞれのニッケル水素蓄電池１０に膨張・収縮が生じた際に、底部３０ｂが変形しやすくなるので、接続部材３０の板厚を厚くして低抵抗の接続部材３０とすることを可能とする機能をも有している。 A plurality of semi-circular openings 30g are formed on the outer periphery of the flat portion 30a. The openings 30g and the radially formed slits 30d reduce the reactive current during resistance welding so that the resistance welding current flows in a concentrated manner in the first projection protrusion 30e or the second projection protrusion 30f. Is provided. In addition, the slits 30d formed radially are charged and discharged with respect to the storage battery module 50, so that when the nickel hydride storage battery 10 expands and contracts, the bottom 30b is easily deformed. The connecting member 30 has a function of increasing the thickness of the connecting member 30 so that the connecting member 30 can have a low resistance.
　この接続部材３０の溶接方法を説明する。最初に第１のニッケル水素蓄電池１０Ａの正極キャップ２８を接続部材３０の皿状の底部側から開口３０ｃ内に挿通し、接続部材３０の第２プロジェクション突起３０ｆを封口体２３の外表面に当接させる。この状態で第２プロジェクション突起３０ｆの裏側から抵抗溶接用電極（図示省略）を当接させ、所定の押圧力を印加しながら封口体２３と抵抗溶接用電極との間に所定の抵抗溶接用電流を印加し、スポット溶接を行う。これにより第２プロジェクション突起３０ｆが形成されていた位置において、接続部材３０と封口体２３との間に溶接痕Ｙが形成される。 A method for welding the connecting member 30 will be described. First, the positive electrode cap 28 of the first nickel metal hydride storage battery 10A is inserted into the opening 30c from the dish-shaped bottom side of the connection member 30, and the second projection protrusion 30f of the connection member 30 is brought into contact with the outer surface of the sealing body 23. Let In this state, a resistance welding electrode (not shown) is contacted from the back side of the second projection protrusion 30f, and a predetermined resistance welding current is applied between the sealing body 23 and the resistance welding electrode while applying a predetermined pressing force. And spot welding is performed. As a result, a welding mark Y is formed between the connecting member 30 and the sealing body 23 at the position where the second projection protrusion 30 f is formed.
　次いで、直列に接続させる第２のニッケル水素蓄電池１０Ｂの外装缶２２の底部外面に接続部材３０の平坦部３０ａに形成されている第１プロジェクション突起３０ｅを当接させる。そして、第１のニッケル水素蓄電池１０Ａと第２のニッケル水素蓄電池１０Ｂとの間に所定の押圧力を印加しながら、第１のニッケル水素蓄電池の封口体２３と第２のニッケル水素蓄電池１０Ｂの外装缶２２との間に所定の抵抗溶接用電流を印加し、スポット溶接を行う。この際、第１のニッケル水素蓄電池１０Ａの封口体２３と第２のニッケル水素蓄電池１０Ｂの外装缶２２との間の短絡を防止する目的で、両者の間に絶縁部材を配置しておく。これにより第１プロジェクション突起３０ｅが形成されていた位置において、第２のニッケル水素蓄電池１０Ｂの外装缶２２の底部外面と接続部材３０との間に溶接痕Ｚが形成される。 Next, the first projection protrusion 30e formed on the flat portion 30a of the connection member 30 is brought into contact with the outer surface of the bottom of the outer can 22 of the second nickel metal hydride storage battery 10B to be connected in series. Then, while applying a predetermined pressing force between the first nickel metal hydride storage battery 10A and the second nickel metal hydride storage battery 10B, the sealing body 23 of the first nickel metal hydride storage battery and the exterior of the second nickel metal hydride storage battery 10B A predetermined resistance welding current is applied to the can 22 to perform spot welding. At this time, for the purpose of preventing a short circuit between the sealing body 23 of the first nickel metal hydride storage battery 10A and the outer can 22 of the second nickel metal hydride storage battery 10B, an insulating member is disposed between them. As a result, a welding mark Z is formed between the outer surface of the bottom of the outer can 22 of the second nickel metal hydride storage battery 10B and the connection member 30 at the position where the first projection protrusion 30e is formed.
　この溶接痕Ｚは、ニッケル水素電池の１０Ｂの負極集電体２０のスリット（２０ｂ、２０ｃ）の位置と重なっていないので、接続部品溶接時の通電電流経路上に、接触が不安定な箇所が存在せず、大電流が流れても、スパッタされた金属粒子が発生し難く、第２のニッケル水素蓄電池１０Ｂの外装缶２２内に配置されている巻回電極体１４の内部短絡が生じ難くなる。このような操作を繰り返すことにより、所定数のニッケル水素蓄電池を直列接続することができる。 Since this welding mark Z does not overlap with the position of the slits (20b, 20c) of the negative electrode current collector 20 of the nickel hydrogen battery 10B, there is a place where the contact is unstable on the energized current path at the time of welding the connecting parts. Even if a large current flows without being present, sputtered metal particles are hardly generated, and an internal short circuit of the wound electrode body 14 disposed in the outer can 22 of the second nickel metal hydride storage battery 10B is less likely to occur. . By repeating such an operation, a predetermined number of nickel-metal hydride storage batteries can be connected in series.
　なお、上記実施形態では、外装缶側が負極となるようにした例を示したが、逆に外装缶側が正極となるようにした場合においても適用可能である。また、上記実施形態では、円筒状のニッケル水素蓄電池の場合について適用した場合を示したが、円筒状のリチウムイオン二次電池や円筒状のニッケルカドミウム蓄電池等、円筒状の蓄電池の場合に対して適用しても、同様の作用効果を奏する。 In the above embodiment, an example in which the outer can side is a negative electrode has been shown, but conversely, the present invention can also be applied to a case where the outer can side is a positive electrode. Moreover, although the case where it applied about the case of a cylindrical nickel hydride storage battery was shown in the said embodiment, with respect to the case of cylindrical storage batteries, such as a cylindrical lithium ion secondary battery and a cylindrical nickel cadmium storage battery. Even if applied, the same effects can be obtained.
　１０、１０Ａ、１０Ｂ…ニッケル水素蓄電池
　１１…ニッケル正極
　１２…水素吸蔵合金負極
　１３…セパレータ
　１４…巻回電極体
　１５…正極芯体
　１６…多孔質ニッケル焼結体
　１７…正極活物質
　１８…負極芯体
　１９…負極合剤層
　２０…負極集電体
　２０ａ…プロジェクション突起
　２０ｂ、２０ｃ…スリット
　２１…正極集電体
　２１…正極集電体
　２１ａ…中心開口
　２１ｂ、２１ｄ…バーリング孔
　２１ｃ…スリット
　２２…外装缶
　２２ａ…環状凹部
　２３…封口体
　２４…ガスケット
　２５…正極集電リード
　２５ａ…平面部
　２５ｂ…頭頂部
　２５ｃ、２５ｅ…開孔
　２５ｄ、２５ｈ…プロジェクション突起
　２５ｆ…中心開口
　２５ｇ…スリット
　２６…開口
　２７…弁体
　２８…正極キャップ
　２９…バネ
　３０…接続部材
　３０ａ…平面部
　３０ｂ…底部
　３０ｃ…開口
　３０ｄ…スリット
　３０ｅ、３０ｆ…プロジェクション突起
　３０ｇ…半円形状の開孔
　３０ａ…平坦部
　５０…蓄電池モジュール
　Ｘ、Ｙ、Ｚ…溶接痕 DESCRIPTION OF SYMBOLS 10, 10A, 10B ... Nickel hydrogen storage battery 11 ... Nickel positive electrode 12 ... Hydrogen storage alloy negative electrode 13 ... Separator 14 ... Winding electrode body 15 ... Positive electrode core body 16 ... Porous nickel sintered body 17 ... Positive electrode active material 18 ... Negative electrode core Body 19 ... Negative electrode mixture layer 20 ... Negative electrode current collector 20a ... Projection protrusion 20b, 20c ... Slit 21 ... Positive electrode current collector 21 ... Positive electrode current collector 21a ... Center opening 21b, 21d ... Burring hole 21c ... Slit 22 ... Exterior Can 22a ... Annular recess 23 ... Sealing body 24 ... Gasket 25 ... Positive electrode current collector lead 25a ... Flat part 25b ... Top part 25c, 25e ... Opening 25d, 25h ... Projection protrusion 25f ... Center opening 25g ... Slit 26 ... Opening 27 ... Valve body 28 ... Positive electrode cap 29 ... Spring 30 ... Connection member 30a ... Plane portion 30b ... Bottom portion 30 ... opening 30d ... slit 30e, 30f ... projection projection 30 g ... opening 30a ... flat portion 50 ... battery module X semicircular, Y, Z ... welding mark

Claims (4)

  1. 　複数の円筒形蓄電池が接続部材を介して互いに直列に接続され、
    　前記円筒形蓄電池は、
    　正極板と負極板とがセパレータを介して互いに絶縁された状態で巻き回された巻回電極体と、
    　前記巻回電極体及び電解液を収納する、一方極の端子を兼ねる金属製の円筒状外装缶と、
    　前記円筒状外装缶の開口部に電気的に絶縁された状態で取り付けられた、他方極の端子を兼ねる封口体とを備え、
    　前記巻回電極体には、巻回軸の一方側の端部に第１の集電体が正極板及び負極板の一方に溶接され、他方側の端部に第２の集電体が正極板及び負極板の他方に溶接され、
    　前記第１の集電体は前記封口体に電気的に接続され、
    　前記第２の集電体は、周辺にスリットが形成された平板状であり、中心部が前記円筒状外装缶の底部内面に溶接されており、
    　前記接続部材は、一方の面が前記円筒形蓄電池の底部外面に、前記第２の集電体のスリット位置とは重ならない位置で溶接されており、他方の面が他の円筒形蓄電池の前記封口体に溶接されている、
    蓄電池モジュール。     A plurality of cylindrical storage batteries are connected in series with each other via a connecting member,
    The cylindrical storage battery is
    A wound electrode body wound in a state where the positive electrode plate and the negative electrode plate are insulated from each other via a separator;
    A cylindrical outer can made of metal that also serves as a terminal of one electrode, containing the wound electrode body and the electrolyte,
    A sealing body that is attached in an electrically insulated state to the opening of the cylindrical outer can, and also serves as a terminal of the other electrode,
    In the wound electrode body, a first current collector is welded to one of the positive electrode plate and the negative electrode plate at one end of the winding shaft, and a second current collector is connected to the positive electrode at the other end. Welded to the other of the plate and the negative plate,
    The first current collector is electrically connected to the sealing body;
    The second current collector has a flat plate shape with slits formed in the periphery, and the center is welded to the bottom inner surface of the cylindrical outer can,
    The connection member has one surface welded to a bottom outer surface of the cylindrical storage battery at a position that does not overlap with the slit position of the second current collector, and the other surface of the connection member of the other cylindrical storage battery. Welded to the sealing body,
    Storage battery module.
  2. 　前記接続部材は、前記一方の円筒形蓄電池の円筒状外装缶の底部外面と前記他方の円筒形蓄電池の封口体との間に、予め定めた一定距離の隙間が形成されるように、皿状とされている、請求項１に記載の蓄電池モジュール。 The connecting member is dish-shaped so that a predetermined gap is formed between the outer surface of the bottom of the cylindrical outer can of the one cylindrical storage battery and the sealing body of the other cylindrical storage battery. The storage battery module according to claim 1, wherein
  3. 　前記接続部材には中心部に開口が形成されており、
    　前記封口体には一方極の端子となる突起が形成されており、
    　前記接続部材は、
    　前記皿状の底部から前記突起が突出するように、前記開口に前記突起が挿入され、前記突起の周囲で前記他方の円筒形蓄電池の前記封口体に溶接されているとともに、前記皿状の縁側で前記一方の円筒形蓄電池の底部外面に溶接されている、請求項２に記載の蓄電池モジュール。     The connection member has an opening at the center,
    The sealing body is formed with a protrusion that becomes a terminal of one electrode,
    The connecting member is
    The protrusion is inserted into the opening so that the protrusion protrudes from the dish-shaped bottom, and is welded to the sealing body of the other cylindrical storage battery around the protrusion, and the dish-shaped edge side The storage battery module according to claim 2, wherein the storage battery module is welded to the bottom outer surface of the one cylindrical storage battery.
  4. 　前記接続部材は、
    　前記他方の円筒形蓄電池の封口体との間の溶接部に前記封口体側に向かって突出する凸部と、前記一方の円筒形蓄電池の底部外面側に向かって突出する凸部とが形成されており、前記凸部でそれぞれ前記他方の円筒形蓄電池の封口体及び前記一方の円筒形蓄電池の底部外面と溶接されている、請求項１～３のいずれかに記載の蓄電池モジュール。     The connecting member is
    A convex portion projecting toward the sealing body side and a convex portion projecting toward the bottom outer surface side of the one cylindrical storage battery are formed in a welded portion between the sealing body of the other cylindrical storage battery. The storage battery module according to any one of claims 1 to 3, wherein the convex portion is welded to a sealing body of the other cylindrical storage battery and a bottom outer surface of the one cylindrical storage battery.
PCT/JP2013/006086 2012-10-30 2013-10-11 Storage battery module WO2014068869A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012239414A JP2016012393A (en) 2012-10-30 2012-10-30 Storage battery module
JP2012-239414 2012-10-30

Publications (1)

Publication Number Publication Date
WO2014068869A1 true WO2014068869A1 (en) 2014-05-08

Family

ID=50626822

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/006086 WO2014068869A1 (en) 2012-10-30 2013-10-11 Storage battery module

Country Status (2)

Country Link
JP (1) JP2016012393A (en)
WO (1) WO2014068869A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113363635A (en) * 2019-05-15 2021-09-07 广东微电新能源有限公司 Button-type battery and method for manufacturing the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117916835A (en) * 2021-09-22 2024-04-19 松下知识产权经营株式会社 Collector plate for power storage device, and method for manufacturing power storage device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006156135A (en) * 2004-11-30 2006-06-15 Gs Yuasa Corporation:Kk Sealed battery, manufacturing method of the same, and battery pack made of a plurality of sealed batteries
JP2007066604A (en) * 2005-08-30 2007-03-15 Sanyo Electric Co Ltd Secondary battery and battery module
JP2009206024A (en) * 2008-02-29 2009-09-10 Sanyo Electric Co Ltd Battery pack
JP2009245733A (en) * 2008-03-31 2009-10-22 Sanyo Electric Co Ltd Module battery
JP2011100661A (en) * 2009-11-06 2011-05-19 Toyota Motor Corp Battery pack

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006156135A (en) * 2004-11-30 2006-06-15 Gs Yuasa Corporation:Kk Sealed battery, manufacturing method of the same, and battery pack made of a plurality of sealed batteries
JP2007066604A (en) * 2005-08-30 2007-03-15 Sanyo Electric Co Ltd Secondary battery and battery module
JP2009206024A (en) * 2008-02-29 2009-09-10 Sanyo Electric Co Ltd Battery pack
JP2009245733A (en) * 2008-03-31 2009-10-22 Sanyo Electric Co Ltd Module battery
JP2011100661A (en) * 2009-11-06 2011-05-19 Toyota Motor Corp Battery pack

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113363635A (en) * 2019-05-15 2021-09-07 广东微电新能源有限公司 Button-type battery and method for manufacturing the same

Also Published As

Publication number Publication date
JP2016012393A (en) 2016-01-21

Similar Documents

Publication Publication Date Title
CN111213257B (en) Energy storage device
JP6228127B2 (en) Cylindrical storage battery and storage battery module
JP6208687B2 (en) Cylindrical secondary battery and manufacturing method thereof
JP5018087B2 (en) An assembled battery composed of a plurality of sealed batteries, sealed battery leads, and sealed batteries
CN102210041A (en) Sealed battery
US20150093612A1 (en) Energy Storage Device
US20090029244A1 (en) Battery, and battery manufacturing method
JP2009110885A (en) Sealed battery and its manufacturing method
JP5159076B2 (en) Cylindrical storage battery and manufacturing method thereof
JP2008192321A (en) Cylindrical storage battery, and its manufacturing method
WO2014068869A1 (en) Storage battery module
JP2008243811A (en) Battery
KR101446153B1 (en) Cap assembly for secondary battery, secondary battery using the same, and method for manufacturing the secondary battery
JP4251829B2 (en) Battery and manufacturing method thereof
JP4465754B2 (en) Sealed battery
JP3820876B2 (en) Cylindrical secondary battery manufacturing method
KR101453782B1 (en) Secondary battery and method for manufacturing the same
JP4079563B2 (en) Storage battery and manufacturing method thereof
CN111183536A (en) Energy storage device and method of manufacturing an energy storage device
CN115548590A (en) Secondary battery
JP5183251B2 (en) Assembled battery
KR20220155017A (en) Secondary Battery
JP5064713B2 (en) Storage battery
JP2004063231A (en) Alkaline storage battery
JP2008251207A (en) Cylindrical battery and its manufacturing method

Legal Events

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

Ref document number: 13851059

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13851059

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP