WO2012120774A1 - 組電池および電池接続方法 - Google Patents
組電池および電池接続方法 Download PDFInfo
- Publication number
- WO2012120774A1 WO2012120774A1 PCT/JP2012/000729 JP2012000729W WO2012120774A1 WO 2012120774 A1 WO2012120774 A1 WO 2012120774A1 JP 2012000729 W JP2012000729 W JP 2012000729W WO 2012120774 A1 WO2012120774 A1 WO 2012120774A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- terminal
- battery
- connection
- external terminal
- bus bar
- Prior art date
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
- 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
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
- H01M50/529—Intercell connections through partitions, e.g. in a battery casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—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
- H01M50/514—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
- H01M50/543—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
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
Definitions
- the present invention relates to an assembled battery and a battery connection method.
- the structure which connects an external terminal and a bus bar via a connection member by welding a part of external terminal and a connection member, and welding the other part of a bus bar and a connection member can be considered.
- the present inventors have found the following problems. That is, if the tip portion of the external terminal and the connecting member are welded, the welding cannot be sufficiently performed when the heights of both of them are displaced, which may lead to an increase in resistance of the welded portion and a decrease in bonding strength. It was.
- the present invention has been made in view of such problems, and its purpose is to perform welding more reliably and sufficiently when welding is used for connection between the external terminal of the battery and the electrical connection member (bus bar).
- the object is to provide a technique for suppressing an increase in resistance of a welded portion and a decrease in bonding strength.
- An embodiment of the present invention is an assembled battery.
- the assembled battery is provided with an electrode body, a housing for housing the electrode body, and a plurality of batteries each having an external terminal electrically connected to the electrode body, and the external terminal inserted therethrough.
- An electrical connection member for electrically connecting external terminals of two adjacent batteries having a through-hole, a terminal connection portion which is a tip region of the external terminal inserted through the through-hole, and a terminal connection portion
- a conductive connecting member that fixes a surrounding electrical connecting member, and a welded portion that connects the terminal connecting portion and the connecting member, the terminal connecting portion being compared with a connecting member in a portion adjacent to the welded portion. It has a region far from the housing.
- the thickness of the connecting member may increase in the vicinity of the welded portion as the distance from the welded portion increases.
- Another embodiment of the present invention is an assembled battery.
- the assembled battery is provided with an electrode body, a housing for housing the electrode body, and a plurality of batteries each having an external terminal electrically connected to the electrode body, and the external terminal inserted therethrough.
- An electrical connection member for electrically connecting the external terminals of two adjacent batteries having a through hole, and a terminal connection portion which is a tip region of the external terminal inserted through the through hole and the periphery of the terminal connection portion And a terminal connecting portion having a region farther from the housing than the portion of the electric connecting member adjacent to the welded portion.
- the thickness of the electrical connection member may increase in the vicinity of the welded portion as the distance from the welded portion increases.
- the battery connection method is a battery connection method for connecting an external terminal of a battery and an electrical connection member for electrically connecting the external terminals of two adjacent batteries, and allows penetration of the external terminal.
- a step of preparing an electrical connection member having a hole, a step of inserting the tip of the external terminal through the through hole, and a region below the surface of the electrical connection member opposite to the battery and the upper end of the tip by a predetermined distance And a step of abutting the conductive connecting member on the surface and a step of welding the portion where the tip portion and the connecting member are in contact with each other.
- the connecting member may be thicker in the vicinity of the contact portion with the tip portion as it is separated from the contact portion.
- the battery connection method is a battery connection method for connecting an external terminal of a battery and an electrical connection member for electrically connecting the external terminals of two adjacent batteries, and allows penetration of the external terminal.
- the electrical connection member may be thicker in the vicinity of the contact portion with the distal end portion as it is separated from the contact portion.
- welding when welding is used for connection between the external terminal of the battery and the electrical connection member (bus bar), welding can be performed more reliably and sufficiently.
- FIG. 1 is a perspective view showing a schematic structure of an assembled battery according to Embodiment 1.
- FIG. It is sectional drawing which shows schematic structure of a battery. It is an expansion perspective view which shows schematic structure of the connection part of the external terminal of a battery, and a bus-bar.
- FIG. 4 is a cross-sectional view taken along line AA in FIG. 3.
- FIG. 5A is a perspective view showing a schematic structure of the connecting member.
- FIG. 6 is a cross-sectional view taken along line BB in FIG.
- FIGS. 6A to 6C are process cross-sectional views illustrating the battery connection method according to the first embodiment.
- FIG. 7A to 7C are enlarged sectional views showing schematic structures before welding in the vicinity of the connection portion between the external terminal and the bus bar in the assembled batteries according to Modifications 1 to 3, respectively.
- 6 is an enlarged cross-sectional view showing a schematic structure in the vicinity of a connection portion between an external terminal and a bus bar in an assembled battery according to Embodiment 2.
- FIG. 9A to 9C are process cross-sectional views illustrating the battery connection method according to the second embodiment.
- FIG. 1 is a perspective view showing a schematic structure of the assembled battery according to the first embodiment.
- the assembled battery 10 includes a plurality of batteries 30 and a bus bar 40 (electrical connection member) that connects these batteries 30.
- a total of five batteries 30 are connected in series to form the assembled battery 10. Note that the number of the batteries 30 is not particularly limited. Moreover, although all the five batteries 30 are connected in series, some may be connected in parallel.
- Each of the five batteries 30 has a flat rectangular parallelepiped casing, and is arranged in parallel at a predetermined interval so that the main surfaces are opposed and substantially parallel.
- a negative electrode terminal 50 is provided near one end in the longitudinal direction, and a positive electrode terminal 60 is provided near the other end.
- the negative electrode terminal 50 and the positive electrode terminal 60 are collectively referred to as external terminals as appropriate.
- the negative electrode terminal 50 and the positive electrode terminal 60 of the adjacent battery 30 are arranged so as to be opposite to each other.
- One positive terminal 60 and the other negative terminal 50 of two adjacent batteries 30 are electrically connected by a bus bar 40, and five batteries 30 are connected in series.
- the battery 30 is accommodated in a housing (not shown).
- the positive terminal 60 ′ serving as one terminal of the series connection of the batteries 30 and the negative terminal 50 ′ serving as the other terminal can be connected to an external load (both not shown) via wiring routed outside the housing. It has become.
- FIG. 2 is a cross-sectional view showing a schematic structure of the battery.
- the battery 30 includes an outer can (housing) 31 in which an electrode body 32 in which positive and negative electrodes are wound in a spiral shape is housed laterally with respect to the can axis direction of the outer can 31. Yes.
- the opening of the outer can 31 is sealed by a sealing plate 33 that constitutes a part of the housing.
- the sealing plate 33 is provided with a negative electrode terminal 50 and a positive electrode terminal 60.
- the sealing plate 33 is formed with a gas discharge valve (not shown).
- the negative electrode terminal 50 has a base part 50a and a terminal connection part 50b protruding from the base part 50a.
- the terminal connection portion 50b refers to a tip region of the negative electrode terminal 50 that is inserted into a through hole 41 of a bus bar 40 described later.
- the terminal connection portion 50b is provided with a recess such that the distal end side of the terminal connection portion 50b is an opening, and the terminal connection portion 50b is partially cylindrical.
- the base 50a is substantially cylindrical and has a flange 50c on the outer peripheral surface.
- the base portion 50 a of the negative electrode terminal 50 is fitted into the negative electrode opening 33 a of the sealing plate 33 with the gasket 34 in contact with the side surface.
- the gasket 34 is also in contact with the surface of the flange 50c that faces the sealing plate 33.
- the base portion 50 a is connected to the negative electrode tab member 53 on the battery inner side of the sealing plate 33.
- a substantially cylindrical terminal connection portion 50b is provided integrally with the base portion 50a so as to protrude upward at the tip of the base portion 50a located outside the battery.
- a recess 51 is provided at the tip of the base 50a located inside the battery so that a side wall is formed along the negative electrode opening 33a.
- the negative electrode terminal 50 is fixed to the negative electrode tab member 53 by caulking so that the edge portion of the recess 51 is widened.
- An insulating plate 35 is provided between the negative electrode tab member 53 and the battery inner surface of the sealing plate 33.
- the insulating plate 35 and the gasket 34 are in contact with each other at the negative electrode opening 33a.
- the negative electrode tab member 53 and the negative electrode terminal 50 are insulated from the sealing plate 33.
- the negative electrode tab member 53 is connected to a negative electrode current collector plate group 32 a protruding from one end face of the electrode body 32.
- the negative electrode current collector plate group 32 a is a bundle of a plurality of negative electrode current collector plates protruding from one end face of the electrode body 32.
- the positive electrode terminal 60 has a base portion 60a and a terminal connection portion 60b protruding from the base portion 60a.
- the terminal connection portion 60b refers to a tip region of the positive electrode terminal 60 that is inserted into a through hole 41 of the bus bar 40 described later.
- the terminal connection portion 60b is provided with a recess such that the distal end side of the terminal connection portion 60b is an opening, and the terminal connection portion 60b has a partially hollow cylindrical shape.
- the terminal connection portion 60b is provided with a recess such that the distal end side of the terminal connection portion 60b is an opening, and the terminal connection portion 60b is partially cylindrical.
- the base 60a is substantially cylindrical and has a flange 60c on the outer peripheral surface.
- the base portion 60 a of the positive electrode terminal 60 is fitted into the positive electrode opening 33 b of the sealing plate 33 with the gasket 34 in contact with the side surface.
- the gasket 34 is also in contact with the surface of the flange 60c that faces the sealing plate 33.
- the base 60 a is connected to the positive electrode tab member 62 on the battery inner side of the sealing plate 33.
- a substantially cylindrical terminal connection portion 60b is provided integrally with the base portion 60a so as to protrude upward at the tip of the base portion 60a located outside the battery.
- a recess 61 is formed at the tip of the base 60a located inside the battery so that a side wall is formed along the positive electrode opening 33b.
- the positive electrode terminal 60 is fixed to the positive electrode tab member 62 by caulking the edge portion of the recess 61 so as to expand.
- An insulating plate 35 is provided between the positive electrode tab member 62 and the battery inner surface of the sealing plate 33.
- the insulating plate 35 and the gasket 34 are in contact with each other at the positive electrode opening 33b.
- the positive electrode tab member 62 and the positive electrode terminal 60 are insulated from the sealing plate 33.
- the positive electrode tab member 62 is connected to the positive electrode current collector plate group 32 b protruding from the other end face of the electrode body 32.
- the positive electrode current collector plate group 32 b is a bundle of a plurality of positive electrode current collector plates protruding from the other end face of the electrode body 32.
- the bases 50a and 60a of this Embodiment are substantially cylindrical shape
- the bases 50a and 60a may be a hollow circular tube by which the center part is hollowed out along the substantially axial center of a cylinder.
- the circular pipe is thinner than the terminal connection portions 50b and 60b.
- the terminal connection portion 50b and the terminal connection portion 60b are partially hollow cylindrical shapes, but may be columnar shapes having no concave portions as described above. May have a hollow cylindrical shape.
- the bus bar 40 is a belt-shaped member made of a conductive material such as metal. At both ends of the bus bar 40, through holes 41 (see FIG. 4) are provided. One negative terminal 50 of the adjacent battery 30 is inserted into one through hole 41 of the bus bar 40, and the other positive terminal 60 of the adjacent battery 30 is inserted into the other through hole 41.
- FIG. 3 is an enlarged perspective view showing a schematic structure in the vicinity of the connection portion between the external terminal of the battery and the bus bar.
- 4 is a cross-sectional view taken along line AA in FIG.
- FIG. 5A is a perspective view showing a schematic structure of the connecting member.
- FIG. 5B is a cross-sectional view taken along the line BB in FIG. 3 and 4, the negative electrode terminal 50 is illustrated as an example of the external terminal.
- the negative terminal 50 and the bus bar 40 are connected via a connecting member 70. That is, a part of the connecting member 70 and the negative electrode terminal 50 are welded, and another part of the connecting member 70 and the bus bar 40 are welded, whereby the negative electrode terminal 50 and the bus bar 40 are connected to each other.
- the connecting member 70 is a ring-shaped member made of a conductive material such as metal, and has a through hole 71 in the center.
- the connecting member 70 includes a base portion 70 a located on the outer peripheral side and a connection portion 70 b formed integrally with the base portion 70 a and positioned around the through hole 71.
- the connecting portion 70b is thinner than the base portion 70a and protrudes from the base portion 70a toward the through hole 71.
- the thickness of the base portion 70a is, for example, about 0.1 mm to about 5 mm
- the thickness of the connection portion 70b is, for example, about 0.05 mm to about 2.5 mm.
- the protruding length of the connecting portion 70b that is, the length from the distal end portion of the connecting portion 70b on the through hole 71 side to the portion connected to the base portion 70a is larger than the radius of the laser irradiated during welding.
- the terminal connection part 50 b of the negative electrode terminal 50 is inserted into the through hole 41 of the bus bar 40, and a part of the tip protrudes from the opening of the through hole 41 on the side opposite to the battery 30.
- the lower surface of the bus bar 40 is in contact with the upper surface of the flange portion 50 c of the negative electrode terminal 50.
- the terminal connection portion 50 b is inserted into the through hole 71 of the connecting member 70 disposed on the bus bar 40, and a part of the tip protrudes from the opening of the through hole 71 on the side opposite to the battery 30.
- the tip of the connecting portion 70b of the connecting member 70 and the terminal connecting portion 50b are connected by the welded portion 80.
- the terminal connecting portion 50b is a portion of the connecting member 70 adjacent to the welded portion 80, that is, a region farther from the bottom surface of the outer can 31 (the bottom surface of the battery 30) than the connecting portion 70b (portion indicated by an arrow R in FIG. 4).
- the welded portion 80 is positioned below a predetermined distance from the upper end of the terminal connecting portion 50b, and the upper surface of the connecting portion 70b adjacent to the welded portion 80 is positioned below the upper end of the terminal connecting portion 50b. Yes.
- the welded portion 80 is formed mainly by melting the tip of the connecting portion 70b by laser irradiation. Therefore, the distal end (one end) of the remaining portion of the connection portion 70 b is in contact with the welded portion 80.
- the lower portion of the outer peripheral surface of the base portion 70a and the bus bar 40 are connected by a welded portion 82.
- 6A to 6C are process cross-sectional views illustrating the battery connection method according to the first embodiment.
- a negative electrode terminal 50 is illustrated as an example of the external terminal.
- a battery 30 having an external terminal having a base portion 50a and a terminal connection portion 50b that is thinner than the base portion 50a and protrudes from the base portion 50a is prepared.
- a connecting member 70 having a base portion 70a and a connecting portion 70b which is thinner than the base portion 70a and protrudes from the base portion 70a toward the through hole 71 is prepared.
- a bus bar 40 having a through hole 41 formed at a predetermined position is prepared. Then, the negative electrode terminal 50 and the through hole 41 of the bus bar 40 are aligned, the bus bar 40 is placed on the negative electrode terminal 50, and the terminal connection portion 50 b is inserted into the through hole 41. Subsequently, the negative electrode terminal 50 and the through hole 71 of the connecting member 70 are aligned, the connecting member 70 is placed on the bus bar 40, and the terminal connecting portion 50 b is inserted into the through hole 71.
- the tip end portion of the connecting portion 70b is located at a predetermined distance from the upper end of the terminal connecting portion 50b in the region below the terminal connecting portion 50b. Abut. In this state, the tip portion of the connection portion 70b is irradiated with the laser L, the tip portion of the connection portion 70b and a part of the terminal connection portion 50b are melted, and the connection portion 70b and the terminal connection portion 50b are welded.
- a portion of the base portion 70a that is in contact with the lower portion of the outer peripheral surface and the bus bar 40 is irradiated with laser L to melt a part of the base portion 70a and a part of the upper surface of the bus bar 40, thereby welding the base portion 70a and the bus bar 40 together.
- the laser L is irradiated over the entire periphery of the portion where the tip portion of the connection portion 70b and the terminal connection portion 50b abut and the entire periphery of the portion where the lower portion of the outer peripheral surface of the base portion 70a contacts the bus bar 40.
- the irradiation range of the laser L is not limited to this, and if sufficient strength is obtained, a part of the portion where the tip portion of the connection portion 70b contacts the terminal connection portion 50b, a lower portion of the outer peripheral surface of the base portion 70a, It may be a part of the portion that contacts the bus bar 40.
- a welded portion 80 is formed between the remaining portion of the connecting portion 70b and the terminal connecting portion 50b, and the connecting member 70 and the terminal connecting portion 50b are connected. Connected. At this time, a part of the terminal connection portion 50b remains, and a region R farther from the battery 30 than the connection portion 70b adjacent to the weld portion 84 is formed. Further, a welded portion 82 is formed between the remaining portion of the base portion 70a and the bus bar 40, and the connecting member 70 and the bus bar 40 are connected. Note that either the connection between the connecting member 70 and the bus bar 40 or the connection between the connecting member 70 and the negative electrode terminal 50 may be performed first or in parallel.
- the tip portion of the connection portion 70b is in contact with the terminal connection portion 50b in a region below a predetermined distance from the upper end of the terminal connection portion 50b.
- FIG. 7A is an enlarged cross-sectional view illustrating a schematic structure before welding in the vicinity of the connection portion between the external terminal and the bus bar in the assembled battery according to the first modification.
- the connection portion 70b is further away from the contact portion.
- the wall thickness is thick.
- the bottom surface of the connecting member 70 is flat, and the tip portion of the connecting portion 70b is located on the bottom surface side of the connecting member 70.
- connection portion 70b since the tip end portion of the connection portion 70b is positioned below the terminal connection portion 50b, the connection portion 70b is more reliably provided in a region below a predetermined distance from the upper end of the terminal connection portion 50b. Can be brought into contact with the terminal connecting portion 50b. As a result, by irradiating the contact portion with the laser, the tip portion of the connection portion 70b can be effectively melted, and a joining portion connecting the terminal connection portion 50b and the connection portion 70b is formed with a sufficient thickness. can do.
- connection part 70b becomes so thick that it leaves
- FIG. 7B is an enlarged cross-sectional view showing a schematic structure before welding in the vicinity of the connection portion between the external terminal and the bus bar in the assembled battery according to Modification 2.
- the connection portion 70b is further away from the contact portion.
- the upper surface of the connecting portion 70b is a convex curved surface.
- the bottom surface of the connecting member 70 is flat, and the tip portion of the connecting portion 70b is located on the bottom surface side of the connecting member 70.
- the surface area of the connecting portion 70b increases, thereby increasing the area of the welded portion and improving the connection strength between the terminal connecting portion 50b and the connecting member 70. be able to.
- FIG. 7C is an enlarged cross-sectional view showing a schematic structure before welding in the vicinity of the connection portion between the external terminal and the bus bar in the assembled battery according to Modification 3.
- the upper surface of the connection portion 70b is formed as a convex curved surface
- the lower surface of the connection portion 70b is shaped like the upper surface of the connection portion 70b. Curved along.
- a surface that is in close contact with the terminal connection portion 50b is formed at the tip of the connection portion 70b.
- connection part 70b since the contact area between the connection part 70b and the terminal connection part 50b increases, heat can be easily released from the terminal connection part 50b to the connection part 70b during laser irradiation. As a result, it is possible to suppress the terminal connection portion 50b from being excessively dissolved.
- the assembled battery 10 according to the second embodiment has a structure in which the external terminals and the bus bar 40 are directly welded.
- the main structures of the assembled battery 10 and the battery 30 are basically the same as those in the first embodiment.
- the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate.
- FIG. 8 is an enlarged cross-sectional view showing a schematic structure in the vicinity of the connection portion between the external terminal and the bus bar in the assembled battery according to the second embodiment.
- a negative electrode terminal 50 is illustrated as an example of the external terminal.
- the bus bar 40 includes a base portion 40a and a connection portion 40b that is thinner than the base portion 40a and protrudes from the base portion 40a toward the through hole 41.
- the base portion 40a and the connection portion 40b are integrally provided.
- the connecting portion 40b extends over the entire circumference of the through hole 41 (see FIG. 9A) of the bus bar 40.
- the thickness of the base portion 40a is, for example, about 0.1 mm to about 5 mm
- the thickness of the connection portion 40b is, for example, about 0.05 mm to about 2.5 mm.
- the protrusion length of the connection part 40b ie, the length from the front-end
- the negative terminal 50 is inserted through the through hole 41 of the bus bar 40.
- the lower surface of the bus bar 40 is in contact with the upper surface of the flange portion 50 c of the negative electrode terminal 50.
- the terminal connection portion 50 b of the negative electrode terminal 50 protrudes upward from the opening of the through hole 41 on the side opposite to the outer can 31.
- the tip end portion of the connection portion 40b of the bus bar 40 and the terminal connection portion 50b are connected by the welding portion 84.
- the terminal connection portion 50 b has a region (a portion indicated by an arrow R in FIG. 8) farther from the outer can 31 than the connection portion 40 b of the portion adjacent to the weld portion 84.
- 9A to 9C are process cross-sectional views illustrating the battery connection method according to the second embodiment.
- 9A to 9C show the negative electrode terminal 50 as an example of the external terminal.
- a bus bar 40 having a base portion 40a and a connection portion 40b that is thinner than the base portion 40a and protrudes from the base portion 40a toward the through hole 41 is prepared.
- a battery 30 is also prepared. Then, the negative electrode terminal 50 and the through hole 41 of the bus bar 40 are aligned, and the bus bar 40 is placed on the negative electrode terminal 50.
- the tip end portion of the connection portion 40b is located at a predetermined distance from the upper end of the terminal connection portion 50b in the region below the terminal connection portion 50b. Abut. In this state, the tip portion of the connection portion 40b is irradiated with the laser L, the tip portion of the connection portion 70b and a part of the terminal connection portion 50b are melted, and the connection portion 40b and the terminal connection portion 50b are welded.
- the laser L is irradiated over the entire circumference of the portion where the tip portion of the connection portion 40b and the terminal connection portion 50b abut. Note that the irradiation range of the laser L is not limited to this, and may be a part of a portion where the tip portion of the connection portion 40b and the terminal connection portion 50b come into contact with each other as long as sufficient strength is obtained.
- a welded portion 84 is formed between the remaining portion of the connecting portion 40b and the terminal connecting portion 50b by the laser L irradiation described above, and the bus bar 40 and the negative electrode terminal 50 are connected. Is done. At this time, a part of the terminal connection portion 50b remains, and a region R farther from the battery 30 than the connection portion 40b adjacent to the weld portion 84 is formed.
- the tip portion of the connection portion 40b is in contact with the terminal connection portion 50b in a region below a predetermined distance from the upper end of the terminal connection portion 50b.
- connection part 70b and the form of contact between the connection part 70b and the terminal connection part 50b in the first to third modifications are changed to the shape of the connection part 40b and the form of contact between the connection part 40b and the terminal connection part 50b. Can be applied.
- the effects as described in the first to third modifications can be obtained in the form in which the connecting portion 40b and the terminal connecting portion 50b are welded.
- the present invention is not limited to the above-described embodiments, and various modifications such as design changes can be added based on the knowledge of those skilled in the art.
- the form can also be included in the scope of the present invention.
- the present invention is applicable to an assembled battery in which a plurality of batteries are connected.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
Description
図1は、実施の形態1に係る組電池の概略構造を示す斜視図である。図1に示すように、組電池10は、複数の電池30と、これらの電池30を接続するバスバー40(電気接続部材)とを有する。本実施形態では、計5個の電池30が直列に接続されて組電池10が形成されている。なお、電池30の数は特に限定されない。また、5つの電池30全てが直列に接続されているが、一部が並列に接続されていてもよい。
続いて、電池30の外部端子とバスバー40とを電気的に接続する電池接続方法について、図6(A)~図6(C)を参照して説明する。図6(A)~図6(C)は、実施の形態1に係る電池接続方法を示す工程断面図である。なお、図6(A)~図6(C)では、外部端子の例として負極端子50を図示している。
図7(A)は、変形例1に係る組電池における外部端子とバスバーの接続部近傍の溶接前の概略構造を示す拡大断面図である。図7(A)に示すように、変形例1に係る組電池10では、端子接続部50bと接続部70bの先端部分との当接部分の近傍において、当該当接部分から離れるほど接続部70bの肉厚が厚くなっている。なお、連結部材70の底面は平坦であり、接続部70bの先端部分は、連結部材70の底面側に位置している。
図7(B)は、変形例2に係る組電池における外部端子とバスバーの接続部近傍の溶接前の概略構造を示す拡大断面図である。図7(B)に示すように、変形例2に係る組電池10では、端子接続部50bと接続部70bの先端部分との当接部分の近傍において、当該当接部分から離れるほど接続部70bの肉厚が厚くなるとともに、接続部70bの上面が凸状の曲面になっている。なお、連結部材70の底面は平坦であり、接続部70bの先端部分は、連結部材70の底面側に位置している。
図7(C)は、変形例3に係る組電池における外部端子とバスバーの接続部近傍の溶接前の概略構造を示す拡大断面図である。図7(C)に示すように、変形例3に係る組電池10では、接続部70bの上面が凸状の曲面で形成されるとともに、接続部70bの下面が接続部70bの上面の形状に沿っ湾曲している。さらに、接続部70bの先端には、端子接続部50bと密着するような面が形成さている。
実施の形態2に係る組電池10は、外部端子とバスバー40とが直に溶接された構造を有する。以下、本実施の形態について説明する。なお、組電池10および電池30の主な構造は実施の形態1と基本的に同一である。実施形態1と同一の構成については同一の符号を付し、その説明は適宜省略する。
続いて、実施の形態2に係る電池接続方法について、図9(A)~図9(C)を参照して説明する。図9(A)~図9(C)は、実施の形態2に係る電池接続方法を示す工程断面図である。なお、図9(A)~図9(C)では、外部端子の例として負極端子50を図示している。
本発明は、上述の各実施の形態に限定されるものではなく、当業者の知識に基づいて各種の設計変更等の変形を加えることも可能であり、そのような変形が加えられた実施の形態も本発明の範囲に含まれうるものである。
Claims (8)
- 電極体と前記電極体を収容する筐体と前記筐体の外部に設けられ、前記電極体と電気的に接続された外部端子とをそれぞれ有する複数の電池と、
前記外部端子が挿通された貫通孔を有し、隣接する2つの電池の外部端子同士を電気的に接続するための電気接続部材と、
前記貫通孔に挿通された前記外部端子の先端領域である端子接続部と、前記端子接続部の周囲の前記電気接続部材とを固定する導電性の連結部材と、
前記端子接続部と前記連結部材とを接続する溶接部と、
を備え、
前記端子接続部は、前記溶接部に隣接する部分の前記連結部材に比べて前記筐体から遠くなる領域を有することを特徴とする組電池。 - 前記溶接部の近傍において、前記溶接部から離れるほど前記連結部材の肉厚が厚くなっている請求項1に記載の組電池。
- 電極体と前記電極体を収容する筐体と前記筐体の外部に設けられ、前記電極体と電気的に接続された外部端子とをそれぞれ有する複数の電池と、
前記外部端子が挿通された貫通孔を有し、隣接する2つの電池の外部端子同士を電気的に接続するための電気接続部材と、
前記貫通孔に挿通された前記外部端子の先端領域である端子接続部と前記端子接続部の周囲の前記電気接続部材とを接続する溶接部と、
とを備え、
前記端子接続部は、前記溶接部に隣接する部分の前記電気接続部材に比べて前記筐体から遠くなる領域を有することを特徴とする組電池。 - 前記溶接部の近傍において、前記溶接部から離れるほど前記電気接続部材の肉厚が厚くなっている請求項3に記載の組電池。
- 電池の外部端子と、隣接する2つの電池の外部端子同士を電気的に接続するための電気接続部材とを接続する電池接続方法であって、
前記外部端子を挿通可能な貫通孔を有する電気接続部材を用意する工程と、
前記貫通孔に前記外部端子の先端部分を挿通させる工程と、
前記電気接続部材の前記電池とは反対側の面および前記先端部分の上端から所定の距離だけ下方の領域に導電性の連結部材を当接させる工程と、
前記先端部分と前記連結部材とが当接した部分を溶接する工程と、
を備えることを特徴とする電池接続方法。 - 前記連結部材は、前記先端部分との当接部分の近傍において、前記当接部分から離れるほど肉厚が厚くなっている請求項5に記載の電池接続方法。
- 電池の外部端子と、隣接する2つの電池の外部端子同士を電気的に接続するための電気接続部材とを接続する電池接続方法であって、
前記外部端子を挿通可能な貫通孔を有する電気接続部材を用意する工程と、
前記貫通孔に前記外部端子の先端部分を挿通させる工程と、
前記先端部分の上端から所定の距離だけ下方の領域に前記電気接続部材を当接させる工程と、
前記先端部分と前記電気接続部材とが当接した部分を溶接する工程と、
を備えることを特徴とする電池接続方法。 - 前記電気接続部材は、前記先端部分との当接部分の近傍において、前記当接部分から離れるほど肉厚が厚くなっている請求項7に記載の電池接続方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/001,933 US20130344378A1 (en) | 2011-03-10 | 2012-02-03 | Assembled battery and cell connection method |
JP2013503346A JP5837043B2 (ja) | 2011-03-10 | 2012-02-03 | 組電池および電池接続方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-053616 | 2011-03-10 | ||
JP2011053616 | 2011-03-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012120774A1 true WO2012120774A1 (ja) | 2012-09-13 |
Family
ID=46797752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/000729 WO2012120774A1 (ja) | 2011-03-10 | 2012-02-03 | 組電池および電池接続方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20130344378A1 (ja) |
JP (1) | JP5837043B2 (ja) |
WO (1) | WO2012120774A1 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014050329A1 (ja) * | 2012-09-27 | 2014-04-03 | 株式会社Gsユアサ | 蓄電装置及び溶接方法 |
WO2014050330A1 (ja) * | 2012-09-27 | 2014-04-03 | 株式会社Gsユアサ | 蓄電装置及び溶接方法 |
WO2014170957A1 (ja) * | 2013-04-16 | 2014-10-23 | 三菱電機株式会社 | バスバー |
JP2015149282A (ja) * | 2014-02-07 | 2015-08-20 | 三星エスディアイ株式会社Samsung SDI Co.,Ltd. | バッテリーモジュール及びその製造方法 |
US20160051762A1 (en) * | 2013-04-22 | 2016-02-25 | Sanogi-Aventis Deutschland Gmbh | Supplementary device for a manually operable injection device |
JPWO2014064888A1 (ja) * | 2012-10-26 | 2016-09-08 | 三洋電機株式会社 | 電源装置及び電源装置を備える電動車両並びに蓄電装置、電源装置の製造方法 |
CN106169554A (zh) * | 2015-05-21 | 2016-11-30 | 株式会社东芝 | 汇流条及电池模块 |
JP2017111896A (ja) * | 2015-12-15 | 2017-06-22 | 株式会社オートネットワーク技術研究所 | バスバー及び蓄電モジュール |
JP2022112412A (ja) * | 2021-01-21 | 2022-08-02 | 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 | 端子部品、二次電池および組電池 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014102094A1 (de) * | 2014-02-19 | 2015-08-20 | Thyssenkrupp Ag | Energiespeicher bestehend aus Energiespeicherzellen |
CN108807725B (zh) * | 2017-05-03 | 2021-11-30 | 苏州科瓴精密机械科技有限公司 | 电池组件及具有该电池组件的电启动汽油机 |
US10586961B2 (en) | 2017-05-30 | 2020-03-10 | Artisan Vehicle Systems Inc. | Multi-modular battery system |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60205965A (ja) * | 1984-03-29 | 1985-10-17 | Shin Kobe Electric Mach Co Ltd | 蓄電池の製造方法 |
WO2006126447A1 (ja) * | 2005-05-23 | 2006-11-30 | Matsushita Electric Industrial Co., Ltd. | 電池モジュールおよびその製造方法 |
JP2010533954A (ja) * | 2007-07-16 | 2010-10-28 | エルジー・ケム・リミテッド | 二次バッテリー用の電気的接続部材 |
WO2011007508A1 (ja) * | 2009-07-17 | 2011-01-20 | パナソニック株式会社 | 組電池及び電池モジュール |
JP2011210725A (ja) * | 2010-03-30 | 2011-10-20 | Sb Limotive Co Ltd | 二次電池及び二次電池モジュール |
JP2011233492A (ja) * | 2010-04-08 | 2011-11-17 | Denso Corp | 電池パック及び電極端子間の接続方法 |
JP2012043714A (ja) * | 2010-08-20 | 2012-03-01 | Toshiba Corp | 溶接方法、電池並びに組電池の製造方法、および、電池 |
JP2012054203A (ja) * | 2010-09-03 | 2012-03-15 | Hitachi Vehicle Energy Ltd | 二次電池およびその製造方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4543310B2 (ja) * | 2004-05-17 | 2010-09-15 | 株式会社デンソー | 電極の接合方法及び電極接合体 |
KR101084220B1 (ko) * | 2009-10-30 | 2011-11-17 | 에스비리모티브 주식회사 | 이차전지의 단자유닛 및 그 제조방법 |
US9105911B2 (en) * | 2009-12-28 | 2015-08-11 | Samsung Sdi Co., Ltd. | Battery module |
-
2012
- 2012-02-03 WO PCT/JP2012/000729 patent/WO2012120774A1/ja active Application Filing
- 2012-02-03 JP JP2013503346A patent/JP5837043B2/ja active Active
- 2012-02-03 US US14/001,933 patent/US20130344378A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60205965A (ja) * | 1984-03-29 | 1985-10-17 | Shin Kobe Electric Mach Co Ltd | 蓄電池の製造方法 |
WO2006126447A1 (ja) * | 2005-05-23 | 2006-11-30 | Matsushita Electric Industrial Co., Ltd. | 電池モジュールおよびその製造方法 |
JP2010533954A (ja) * | 2007-07-16 | 2010-10-28 | エルジー・ケム・リミテッド | 二次バッテリー用の電気的接続部材 |
WO2011007508A1 (ja) * | 2009-07-17 | 2011-01-20 | パナソニック株式会社 | 組電池及び電池モジュール |
JP2011210725A (ja) * | 2010-03-30 | 2011-10-20 | Sb Limotive Co Ltd | 二次電池及び二次電池モジュール |
JP2011233492A (ja) * | 2010-04-08 | 2011-11-17 | Denso Corp | 電池パック及び電極端子間の接続方法 |
JP2012043714A (ja) * | 2010-08-20 | 2012-03-01 | Toshiba Corp | 溶接方法、電池並びに組電池の製造方法、および、電池 |
JP2012054203A (ja) * | 2010-09-03 | 2012-03-15 | Hitachi Vehicle Energy Ltd | 二次電池およびその製造方法 |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014050330A1 (ja) * | 2012-09-27 | 2014-04-03 | 株式会社Gsユアサ | 蓄電装置及び溶接方法 |
WO2014050329A1 (ja) * | 2012-09-27 | 2014-04-03 | 株式会社Gsユアサ | 蓄電装置及び溶接方法 |
JPWO2014050330A1 (ja) * | 2012-09-27 | 2016-08-22 | 株式会社Gsユアサ | 蓄電装置及び溶接方法 |
JPWO2014050329A1 (ja) * | 2012-09-27 | 2016-08-22 | 株式会社Gsユアサ | 蓄電装置及び溶接方法 |
JPWO2014064888A1 (ja) * | 2012-10-26 | 2016-09-08 | 三洋電機株式会社 | 電源装置及び電源装置を備える電動車両並びに蓄電装置、電源装置の製造方法 |
WO2014170957A1 (ja) * | 2013-04-16 | 2014-10-23 | 三菱電機株式会社 | バスバー |
US10195355B2 (en) * | 2013-04-22 | 2019-02-05 | Sanofi-Aventis Deutschland Gmbh | Supplementary device for a manually operable injection device |
US20160051762A1 (en) * | 2013-04-22 | 2016-02-25 | Sanogi-Aventis Deutschland Gmbh | Supplementary device for a manually operable injection device |
JP2015149282A (ja) * | 2014-02-07 | 2015-08-20 | 三星エスディアイ株式会社Samsung SDI Co.,Ltd. | バッテリーモジュール及びその製造方法 |
CN106169554A (zh) * | 2015-05-21 | 2016-11-30 | 株式会社东芝 | 汇流条及电池模块 |
CN106169554B (zh) * | 2015-05-21 | 2019-07-05 | 株式会社东芝 | 汇流条及电池模块 |
JP2017111896A (ja) * | 2015-12-15 | 2017-06-22 | 株式会社オートネットワーク技術研究所 | バスバー及び蓄電モジュール |
WO2017104378A1 (ja) * | 2015-12-15 | 2017-06-22 | 株式会社オートネットワーク技術研究所 | バスバー及び蓄電モジュール |
JP2022112412A (ja) * | 2021-01-21 | 2022-08-02 | 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 | 端子部品、二次電池および組電池 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2012120774A1 (ja) | 2014-07-07 |
JP5837043B2 (ja) | 2015-12-24 |
US20130344378A1 (en) | 2013-12-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5837043B2 (ja) | 組電池および電池接続方法 | |
KR101818631B1 (ko) | 전지 및 그 제조 방법 | |
JP7006613B2 (ja) | 角形二次電池 | |
KR101737644B1 (ko) | 고출력 전기 화학 전지 내의 내부 부품들의 외부에서 인가된 레이저 용접을 위한 방법 및 디자인 | |
JP5117554B2 (ja) | 密閉型電池 | |
CN109643773A (zh) | 用于电池外壳壁的集成电气馈通件 | |
KR20100108854A (ko) | 이차전지 | |
TWI499150B (zh) | 模組式電流中斷裝置、電池、及其製造方法 | |
JP7157956B2 (ja) | 円筒型電池及びその製造方法 | |
JPWO2018003290A1 (ja) | 電池ブロック | |
KR102487890B1 (ko) | 이차 전지 | |
JP2016110859A (ja) | 電流遮断装置および二次電池 | |
JP6072674B2 (ja) | 組電池および電池接続方法 | |
JP2013051185A (ja) | 組電池 | |
KR101566040B1 (ko) | 높은 전류 용량의 에너지 전달 장치용 캡 조립체 | |
JP2003297335A (ja) | 蓄電池およびその製造方法 | |
JP2024037388A (ja) | 電池、および電池の製造方法 | |
CN111081965B (zh) | 电池和电池的制造方法 | |
JP5034240B2 (ja) | 電池の製造方法 | |
JP2016175095A (ja) | 超音波溶接方法 | |
WO2023032151A1 (ja) | 電池 | |
CN219779163U (zh) | 极柱、电池、电池组 | |
JP2018107009A (ja) | 蓄電装置 | |
JP2023117791A (ja) | 電池および電池の製造方法 | |
JP2012204251A (ja) | 電池の製造方法及び電池 |
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: 12755735 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2013503346 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14001933 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12755735 Country of ref document: EP Kind code of ref document: A1 |