WO2016105169A1 - 이차전지 모듈의 전극 리드 용접 방법 및 이를 이용한 컴팩트한 이차전지 모듈 - Google Patents
이차전지 모듈의 전극 리드 용접 방법 및 이를 이용한 컴팩트한 이차전지 모듈 Download PDFInfo
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- WO2016105169A1 WO2016105169A1 PCT/KR2015/014282 KR2015014282W WO2016105169A1 WO 2016105169 A1 WO2016105169 A1 WO 2016105169A1 KR 2015014282 W KR2015014282 W KR 2015014282W WO 2016105169 A1 WO2016105169 A1 WO 2016105169A1
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- lead
- secondary battery
- battery module
- cartridge
- welding
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
- B23K26/323—Bonding taking account of the properties of the material involved involving parts made of dissimilar metallic material
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/46—Accumulators structurally combined with charging apparatus
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- 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
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- 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
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- 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
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
- H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
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- 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
- H01M50/271—Lids or covers for the racks or secondary casings
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- 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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M50/50—Current conducting connections for cells or batteries
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- H—ELECTRICITY
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- 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
- H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
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- 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
- H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
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- 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
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- 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
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- 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
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/562—Terminals characterised by the material
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- 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
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
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- 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
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/12—Copper or alloys thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- 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 an electrode lead welding method of a secondary battery module and a compact secondary battery module using the same, and more particularly, to a method of welding electrode leads and a bus bar of a lithium secondary battery module and a lithium secondary battery module using the same. .
- a lithium secondary battery has a structure in which an electrode assembly of a cathode / separator / anode is embedded in a sealed container together with an electrolyte.
- the lithium secondary battery is composed of a positive electrode, a negative electrode, a separator and an electrolyte interposed therebetween, and a lithium ion battery (LIB) and a lithium polymer battery depending on which positive electrode active material and negative electrode active material are used.
- LIB lithium ion battery
- the electrodes of these lithium secondary batteries are formed by applying a positive electrode or negative electrode active material to a current collector, such as an aluminum or copper sheet, a mesh, a film, a foil, and the like, followed by drying.
- the secondary battery module uses a method of constructing a path using a welding, bolting, and riveting method between cell leads in a series or parallel configuration of cells stored in each cartridge.
- three members such as an anode lead made of aluminum, a cathode lead made of copper, and a bus bar made of copper disposed for sensing when configuring each cell in series or in parallel in the secondary battery module, are described in detail. It must be electrically connected in the same way.
- the secondary battery module used in the energy storage device or the power storage device is focused on technology development to configure the secondary battery module as compact as possible in order to increase energy efficiency or density.
- the welding (especially laser welding) of the electrode leads Al (Cu) and the bus bar (Cu) of the cell is aluminum lead-copper lead- It was common to arrange a base material in order of a bus bar, and to irradiate and weld a laser from the cell lead side. However, when welding is performed in this order, the cell leads are first deformed by a laser.
- the present invention has been conceived to solve the above-described problems of the prior art, and when the corresponding electrode leads of adjacent cells of the secondary battery module are contacted and overlapped, the bus bar is partially cut, and the bus bar is positioned in place. It is an object of the present invention to provide an electrode lead welding method of a secondary battery module having a structure improved to be welded to a bus bar and a lead of a material, and a compact secondary battery module using the same.
- a plurality of lead overlapping portions in which the leads of neighboring cells overlap are positioned in a predetermined pattern on the sidewall of the cartridge, and accommodates each cell.
- a cartridge assembly comprising a plurality of cartridges stacked together; And a sensing housing provided with a plurality of bus bars corresponding to each lead overlap and capable of being welded and disposed on the side of the cartridge assembly;
- the first lead of the cell constituting each lead overlap is shorter than a predetermined width than a second lead of polarity opposite to the first lead, and with the sensing housing coupled to the cartridge assembly, the corresponding bus bar may be
- the second lead and the bus bar are welded by contacting the second lead on a line substantially the same as the first lead.
- the secondary battery module has a partition provided on the side of each cartridge to protect the cell during the welding operation.
- the leads of each cell are bent at right angles at approximately 1 mm from the lead insulation in the state of being housed in the corresponding cartridge.
- the welding is laser welding.
- the direction of the laser is substantially perpendicular to the sensing housing.
- the bus bar and the second lead are made of copper and the first lead is made of aluminum.
- the sensing housing further comprises a BMS circuit board for managing the voltage and / or temperature data of each cell sensed by the bus bar.
- the sensing housing is snapped or hooked to the cartridge assembly.
- it further comprises a sensing cover coupled to the sensing housing.
- the sensing cover is snapped or hooked to the sensing housing.
- two neighboring cartridges of the cartridge assembly are hooked together.
- the cartridge assembly further comprises an upper cover and a lower cover which are each hooked to the cartridges at both ends.
- a method of welding an electrode lead of a secondary battery module wherein (a) leads of opposite polarities having a width smaller than a width of a second lead are opposite to each other. Preparing a plurality of cells bent in a direction; (b) forming a cartridge assembly by stacking a plurality of cartridges in which each cell is housed so that lead overlaps in which leads of opposite polarities of neighboring cells overlap are positioned in a predetermined pattern on the side of the cartridge; (c) placing a sensing housing on the side of the cartridge assembly provided with a plurality of bus bars corresponding to each lead overlap so that the corresponding bus bars contact the second leads on the same line as the first leads; And (d) welding the bus bars and the second lead of each lead overlap.
- the step (b) uses a cartridge provided with a partition on each side on which the first lead and the second lead are placed.
- each lead is bent at a right angle at about 1 mm from the lead insulation portion of the cell in a state of being housed in a corresponding cartridge.
- step (d) uses a laser welder.
- the laser scanning direction of the laser welder is substantially perpendicular to the sensing housing.
- the bus bar and the second lead are made of copper and the first lead is made of aluminum.
- the electrode terminal welding method of the compact secondary battery module and the secondary battery module using the same according to exemplary embodiments of the present invention have the following effects.
- the bending length of the lead of the cell is minimized, and in the process of assembling the structure having the bus bar to the side of the cartridge assembly, the method of welding the lead of the cell of the same material as the bus bar, that is, the sensing structure by the same material welding Can improve the welding quality.
- the damage of the lead can be prevented by applying the manner in which the bus bar is first scanned in the welding scan direction.
- FIG. 1 is a combined perspective view of a rechargeable battery module according to an exemplary embodiment of the present invention.
- FIG. 2 is an exploded perspective view of a rechargeable battery module according to an exemplary embodiment of the present invention.
- FIG. 3 is an excerpt perspective view of a sensing housing part that may be used in a secondary battery module according to an exemplary embodiment of the present invention.
- FIG. 4 is an excerpt perspective view of a cartridge assembly portion that may be used in a secondary battery module according to an exemplary embodiment of the present invention.
- FIG. 5 is an enlarged view of a portion A of FIG. 4.
- FIG. 6 is a cross-sectional view showing a bent portion of a lead of a cell of a secondary battery module according to an exemplary embodiment of the present invention.
- FIG. 7 is a schematic diagram illustrating a welding process between bus bars of a sensing housing and respective cell leads in a process of assembling a secondary battery module according to an exemplary embodiment of the present invention.
- FIG. 8 is an exploded perspective view of a rechargeable battery module according to an exemplary embodiment of the present invention.
- FIG. 9 is a perspective view of the combination of FIG.
- the first lead of each cell is shown in red
- the second lead is shown in blue
- each bus bar of the sensing housing is shown in yellow.
- FIG. 1 is a perspective view of a secondary battery module in accordance with a preferred embodiment of the present invention
- Figure 2 is an exploded perspective view of a secondary battery module according to a preferred embodiment of the present invention.
- a compact secondary battery module 100 includes a cartridge assembly in which a plurality of cartridges 10 containing respective cells 2 are stacked. 20) and a sensing housing 30 coupled to the side of the cartridge assembly 20, for example in the form of a one-touch or snap-fit, hook.
- the cartridge assembly 20 is a stack of a plurality of cartridges 10 formed by injection molding of plastic and having an accommodating part for accommodating the cells 2, each cartridge 10 being snap-fit or hooked with each other. It is preferable to combine.
- the leads 12, 14 having the opposite polarity of neighboring cells 2 for example, have a first polarity and are made of aluminum, for example.
- the cartridge assembly 20 also has an upper cover 11 and a lower cover 13, for example hooked to the cartridges 10 at both ends.
- the upper cover 11 and the lower cover 13 are each injection molded to have substantially the same shape as the individual cartridge 10 of the cartridge assembly 20.
- the upper cover 11 and the lower cover 13 have a function of protecting the cells 2 accommodated in the cartridges 10 at both ends, and have a function and structure of finishing the outer shape of the secondary battery module 100 and surrounding them. Will be understood by those skilled in the art.
- FIG. 3 is a perspective view of an excerpt of a sensing housing portion that may be used in a secondary battery module according to an exemplary embodiment of the present invention
- FIG. 4 is a cartridge assembly that may be used in a secondary battery module according to an exemplary embodiment of the present invention.
- Excerpt perspective view of a part FIG. 5 is an enlarged view of part A of FIG.
- the sensing housing 30 is provided with a plurality of bus bars 32 corresponding to the respective lead overlaps 16.
- Each bus bar 32 is preferably made of copper, for example.
- the sensing housing 30 may be injection molded by, for example, insulating plastic in a substantially rectangular shape, and a plurality of receiving holes 35 capable of accommodating each bus bar 32 may be formed in a predetermined pattern. It is formed through.
- the voltage and / or temperature data of each cell 2 sensed by the corresponding bus bar 32 is collected and the corresponding cell 2 is balanced through the collected data.
- a BMS circuit board 34 having a function of transferring data to another control unit (not shown) of the module.
- the BMS circuit board 34 is electrically connected to one end of each bus bar 32.
- the first lead and the second lead 14 extend and bend from the side of each cell 2 by a predetermined length and have a predetermined width, respectively.
- the first lead 12 of each cell 2 is bent 90 degrees upwards in the figure, and the second lead 14 is bent 90 degrees downward in the figure.
- the width W1 of the first lead 12 is shorter than the width W2 of the second lead 14, so that the width W1 of the first lead 12 and the following will be described later. It is preferable that the sum of the lengths Lb of the bus bars 32 is substantially the same as the width W2 of the second lead 14.
- reference numeral 36 denotes a pair of data communication ports for transmitting and receiving data between respective BMS circuit boards 34 when a plurality of modules 100 are coupled
- reference numeral 38 denotes a secondary battery module ( 100 is a temperature data port for receiving a signal of a temperature sensor (not shown) for measuring the internal temperature
- Reference numeral 31 denotes a positive terminal terminal and a negative terminal terminal of the completed secondary battery module 100, respectively.
- each corresponding bus bar 32 is connected to the second lead 14 substantially on the same line as the first lead 12.
- the second lead 14 and bus bar 32 may be laser welded, for example.
- the skilled person will appreciate that the first lead 12, the second lead 14, and the corresponding bus bar 32 may be joined to each other by ultrasonic welding.
- FIG. 6 is a cross-sectional view showing a bent portion of the lead of the cell of the secondary battery module according to an exemplary embodiment of the present invention
- Figure 7 is sensing during the assembly process of the secondary battery module according to an exemplary embodiment of the present invention
- the cartridge assembly 20 in which the first lead 12 and the second lead 14 of the cells 2 adjacent to each lead overlap 16 are in contact with each other and overlapped.
- the bus bar 32 may be formed in the direction toward the cartridge assembly from the outside of the module 100, that is, from the direction in which laser welding is performed.
- the first lead 12 and the second lead 14 are sequentially positioned.
- welding between the leads 12, 14 and between the bus bar 32 and the leads 12, 14 in the arrangement of these base materials in particular in a direction substantially perpendicular to the sensing housing 30.
- each cartridge 10 has a partition 18 provided on its side to protect the cells 2 contained in each cartridge 10 of the cartridge assembly 20.
- barrier 18 has a barrier function to prevent the laser (not shown) scanned by the laser device (not shown) from being directly scanned into the cell 2.
- the leads 12 and 14 of each cell 2 are placed in a state where they are housed in a corresponding cartridge. It is preferred to bend at right angles from approximately 0.8 to 1.2 mm from the insulation 15.
- FIG. 8 which is an exploded perspective view before final assembly of the rechargeable battery module according to an exemplary embodiment of the present invention
- FIG. 9, which is a final combined perspective view, respectively, in a state in which the sensing housing 30 is coupled to the cartridge assembly 20.
- 2 illustrates a state in which the sensing cover 40 is coupled to the sensing housing 30 to protect the BMS circuit board 34 and the bus bar 32.
- Sensing cover 40 is preferably snap or hook coupled to the sensing housing (30).
- the width W1 of the first lead 12 is formed to be shorter than the width W2 of the second lead 14 (eg, formed to be as short as the length Lb of each bus bar 32), Leads 12 and 14 of opposite polarities are prepared in a plurality of cells 2 that are bent in opposite directions.
- the width W1 of the first lead 12 may be manufactured to be shorter than the width W2 of the second lead 14 from the beginning, and the first lead 12 and the second lead may be made.
- the width W1 can be shortened so that the width W1 of the first lead 12 is cut by a predetermined length in each cell 2.
- the leads 12 and 14 of the cells are bent at right angles at approximately 0.8 to 1.2 mm, preferably at a 1 mm point, from the lead insulator 15 with the cells 2 respectively housed in the corresponding cartridges 10. By doing so, energy efficiency can be maximized.
- the cartridge assembly 20 is formed by stacking a plurality of cartridges 10 in which the cartridges are accommodated.
- Each cartridge 10 for forming the cartridge assembly 20 is provided with an accommodating portion for accommodating the cells 2 and a hook so that neighboring pairs of cartridges 10 can be snap-fit or hooked with each other.
- the upper cover 11 and the lower cover 13 which can receive and protect the cells 2, are for example snap-fitted or hooked.
- the cartridge 10 in which the first lead 12 and the second lead 14 are placed uses a cartridge having partition walls 18 provided on each side thereof, so that the cell 2 is removed from the laser during the laser welding operation described later. To protect.
- each of the bus bars 32 is previously disposed in the sensing housing 30 in a predetermined pattern.
- the first lead 12 is made of aluminum
- the second lead 14 and the bus bar 32 are made of copper.
- each lead overlap 16 is welded.
- This step may use a welding system having a plurality of welding points, or may perform several points welding using individual laser welders.
- a separate laser welder or welding point is used between the first lead 12 and the second lead 14.
- the laser welder preferably scans the laser in a direction substantially perpendicular to the sensing housing 30.
- the secondary battery modules 100 are electrically connected in a series / parallel manner to each other and stored in a predetermined case, for example, a power storage device for a home photovoltaic (PV) solar energy panel. It can provide a compact secondary battery pack for.
- a power storage device for a home photovoltaic (PV) solar energy panel for example, a power storage device for a home photovoltaic (PV) solar energy panel. It can provide a compact secondary battery pack for.
- PV photovoltaic
- the present invention relates to an electrode lead welding method of a secondary battery module and a compact secondary battery module using the same, in particular, it can be used in the industry related to electrode lead welding of a secondary battery module.
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Abstract
Description
Claims (20)
- 이웃하는 셀의 리드들이 겹쳐지는 다수의 리드 중첩부들이 카트리지 측벽에 미리 결정된 패턴으로 위치되고, 각각의 셀을 수납하면서 적층된 다수의 카트리지들을 포함하는 카트리지 조립체; 및각각의 리드 중첩부에 상응하게 위치되어 용접될 수 있는 다수의 버스 바들이 마련되고 카트리지 조립체의 측면에 배치될 수 있는 센싱 하우징을 구비하고;각각의 리드 중첩부를 구성하는 셀의 제1 리드는 제1 리드와 반대되는 극성의 제2 리드보다 미리 결정된 폭 보다 짧게 구성되고, 카트리지 조립체에 센싱 하우징이 결합된 상태에서, 대응되는 버스 바는 제1 리드와 실질적으로 동일한 선상에서 제2 리드에 접촉되어 제2 리드와 버스 바가 용접되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1에 있어서,용접 작업시 셀을 보호하기 위해 각각의 카트리지의 측면에 마련된 격벽을 구비하는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1에 있어서,각각의 셀의 리드는 상응하는 카트리지에 수납된 상태에서 리드 절연부로부터 대략 1mm 지점에서 직각으로 굴곡되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1에 있어서,상기 용접은 레이저 용접인 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 4에 있어서,상기 레이저의 방향은 센싱 하우징에 실질적으로 수직인 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1에 있어서,버스 바와 제2 리드는 구리로 제작되고, 제1 리드는 알루미늄으로 제작되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1에 있어서,센싱 하우징은 버스 바에 의해 감지되는 각각의 셀의 전압 및/또는 온도 데이터를 관리하기 위한 BMS 회로 기판을 더 구비하는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 7에 있어서,센싱 하우징은 카트리지 조립체에 스냅 또는 후크 결합되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 7에 있어서,센싱 하우징에 결합되는 센싱 커버를 더 구비하는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 9에 있어서,센싱 커버는 센싱 하우징에 스냅 또는 후크 결합되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1에 있어서,카트리지 조립체의 이웃하는 2개의 카트리지들은 서로 후크 결합되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1에 있어서,카트리지 조립체는 양단의 카트리지에 각각 후크 결합되는 상부 커버와 하부 커버를 더 구비하는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- (a) 제1 리드의 폭이 제2 리드의 폭 보다 더 짧게 형성된 서로 반대되는 극성의 리드들이 반대 방향으로 굴곡된 다수의 셀들을 준비하는 단계;(b) 이웃하는 셀의 반대되는 극성의 리드들이 겹쳐지는 리드 중첩부들이 카트리지 측벽에 미리 결정된 패턴으로 위치되도록 각각의 셀이 수납된 다수의 카트리지들을 적층시켜 카트리지 조립체를 형성하는 단계;(c) 대응되는 버스 바가 제1 리드와 실질적으로 동일한 선상에서 제2 리드에 접촉되도록, 각각의 리드 중첩부에 상응하는 다수의 버스 바들이 설치된 센싱 하우징을 카트리지 조립체의 측면에 배치시키는 단계; 및(d) 각각의 리드 중첩부의 제2 리드와 버스 바를 용접시키는 단계를 포함하는 것을 특징으로 하는 컴팩트한 이차전지 모듈의 전극 리드 용접 방법.
- 청구항 13에 있어서,상기 (b) 단계는 제1 리드와 제2 리드가 놓여지는 각각의 측면에 격벽이 마련된 카트리지를 이용하는 것을 특징으로 하는 컴팩트한 이차전지 모듈의 전극 리드 용접 방법.
- 청구항 13에 있어서,상기 (a) 단계는 상응하는 카트리지에 수납된 상태에서 셀의 리드 절연부로부터 각각의 리드가 대략 1mm 지점에서 직각으로 굴곡되는 것을 특징으로 하는 컴팩트한 이차전지 모듈의 전극 리드 용접 방법.
- 청구항 13에 있어서,상기 (d) 단계는 레이저 용접기를 이용하는 것을 특징으로 하는 컴팩트한 이차전지 모듈의 전극 리드 용접 방법.
- 청구항 16에 있어서,레이저 용접기의 레이저 주사 방향은 센싱 하우징에 실질적으로 수직인 것을 특징으로 하는 컴팩트한 이차전지 모듈의 전극 리드 용접 방법.
- 청구항 13에 있어서,버스 바와 제2 리드는 구리로 제작되고, 제1 리드는 알루미늄으로 제작되는 것을 특징으로 하는 컴팩트한 이차전지 모듈의 전극 리드 용접 방법.
- 청구항 13 내지 청구항 18 중 어느 한 항의 방법에 의해 제조된 컴팩트한 이차전지 모듈.
- 청구항 19의 컴팩트한 이차전지 모듈을 포함하는 이차전지 팩.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP15873696.7A EP3220449A4 (en) | 2014-12-24 | 2015-12-24 | Method for welding electrode leads of secondary battery module, and compact secondary battery module for which the method has been used |
US15/533,855 US10629881B2 (en) | 2014-12-24 | 2015-12-24 | Method for welding electrode leads of secondary battery module and compact secondary battery module using the same |
CN201580070618.8A CN107112485B (zh) | 2014-12-24 | 2015-12-24 | 焊接二次电池模块的电极引线的方法和使用该方法的紧凑二次电池模块 |
JP2017530003A JP6440002B2 (ja) | 2014-12-24 | 2015-12-24 | 二次電池モジュールの電極リード溶接方法及びそれを用いたコンパクトな二次電池モジュール |
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KR1020140188079A KR101817237B1 (ko) | 2014-12-24 | 2014-12-24 | 이차전지 모듈의 전극 리드 용접 방법 및 이를 이용한 컴팩트한 이차전지 모듈 |
KR10-2014-0188079 | 2014-12-24 |
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US (1) | US10629881B2 (ko) |
EP (1) | EP3220449A4 (ko) |
JP (1) | JP6440002B2 (ko) |
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CN (1) | CN107112485B (ko) |
WO (1) | WO2016105169A1 (ko) |
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KR102366138B1 (ko) | 2018-12-06 | 2022-02-22 | 주식회사 엘지에너지솔루션 | 전지 모듈 |
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US20180138485A1 (en) * | 2015-06-24 | 2018-05-17 | Autonetworks Technologies, Ltd. | Wiring module and power storage module |
KR20190073551A (ko) * | 2016-11-07 | 2019-06-26 | 가부시키가이샤 인비젼 에이이에스씨 재팬 | 스페이서, 조전지 및 조전지의 제조 방법 |
CN110192293A (zh) * | 2016-11-07 | 2019-08-30 | 远景Aesc日本有限公司 | 间隔件、组电池以及组电池的制造方法 |
EP3537509A4 (en) * | 2016-11-07 | 2019-10-23 | Envision AESC Japan Ltd. | SPACER, COMPOSITE BATTERY AND METHOD FOR PRODUCING THE COMPOSED BATTERY |
KR102124735B1 (ko) * | 2016-11-07 | 2020-06-18 | 가부시키가이샤 인비젼 에이이에스씨 재팬 | 스페이서, 조전지 및 조전지의 제조 방법 |
US11128006B2 (en) | 2016-11-07 | 2021-09-21 | Envision Aesc Japan Ltd. | Spacer, battery pack, and method for manufacturing battery pack |
US11322805B2 (en) * | 2017-10-03 | 2022-05-03 | Marelli Corporation | Method of manufacturing battery pack and battery pack |
CN109175679A (zh) * | 2018-10-29 | 2019-01-11 | 武汉逸飞激光智能装备有限公司 | 焊接系统 |
CN110828598A (zh) * | 2019-10-30 | 2020-02-21 | 江苏朗道新能源有限公司 | 一种半片叠瓦组件及其制作方法 |
CN110828598B (zh) * | 2019-10-30 | 2024-03-08 | 江苏朗道新能源有限公司 | 一种半片叠瓦组件及其制作方法 |
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KR20160077765A (ko) | 2016-07-04 |
US20170331097A1 (en) | 2017-11-16 |
KR101817237B1 (ko) | 2018-01-11 |
CN107112485B (zh) | 2020-04-28 |
JP2017539061A (ja) | 2017-12-28 |
US10629881B2 (en) | 2020-04-21 |
JP6440002B2 (ja) | 2018-12-19 |
CN107112485A (zh) | 2017-08-29 |
EP3220449A4 (en) | 2018-08-01 |
EP3220449A1 (en) | 2017-09-20 |
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