WO2016105168A1 - 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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- WO2016105168A1 WO2016105168A1 PCT/KR2015/014281 KR2015014281W WO2016105168A1 WO 2016105168 A1 WO2016105168 A1 WO 2016105168A1 KR 2015014281 W KR2015014281 W KR 2015014281W WO 2016105168 A1 WO2016105168 A1 WO 2016105168A1
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/364—Battery terminal connectors with integrated measuring arrangements
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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
- H01M10/00—Secondary cells; Manufacture thereof
- 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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- 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
- H01M10/42—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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- 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
- H01M10/42—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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- 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
- H01M10/42—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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- 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
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/256—Carrying devices, e.g. belts
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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
- H01M50/20—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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- 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
- H01M50/271—Lids or covers for the racks or secondary casings
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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
- H01M50/20—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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- 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
- H01M50/507—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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- 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
- H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
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- 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
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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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
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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
- H01M50/543—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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- 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
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
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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-mentioned problems of the prior art, and the bus bars of copper material, copper leads of the same material as bus bars, and aluminum leads sequentially overlapping the corresponding electrode leads of adjacent cells of the secondary battery module.
- the purpose is to provide a module.
- a plurality of lead welds overlapping the first lead and the second lead of neighboring cells are positioned in a predetermined pattern on the sidewall of the cartridge,
- a cartridge assembly including a plurality of cartridges stacked while receiving each cell;
- a sensing housing provided with a plurality of bus bars correspondingly located and welded to each lead weld and arranged on the side of the cartridge assembly;
- the ends of the leads of the neighboring cells are positioned substantially on the same line so that a plurality of lead welds are formed in a predetermined pattern on the sidewall of the cartridge, and each cell is accommodated.
- a cartridge assembly comprising a plurality of stacked cartridges; And a sensing housing provided with a plurality of bus bars correspondingly located and welded to each lead weld and arranged on the side of the cartridge assembly; When the sensing housing is coupled to the cartridge assembly, each bus bar is welded at different welding points to a first lead of the corresponding cell and a second lead of opposite polarity to 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 voltage and / or temperature data of each cell sensed by each bus bar.
- the sensing housing is snapped or hooked to the cartridge assembly.
- the secondary battery module further includes 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 includes an upper cover and a lower cover that are each hooked to the cartridge at both ends.
- Electrode lead welding method of a compact secondary battery module for achieving the above object, (a) a plurality of first and second leads each having the opposite polarity is bent in the opposite direction Preparing cells of the cell; (b) Lead welds formed in a predetermined pattern on the cartridge sidewall such that the first lead of one of the neighboring cells faces the cartridge sidewall and the second lead of the other cell faces the first lead Stacking a plurality of cartridges containing each cell so as to form a cartridge assembly; (c) assembling a sensing housing provided with a plurality of bus bars facing each second lead to the side of the cartridge assembly; And (d) welding each bus bar, corresponding second leads and first leads.
- a method of welding a lead of a compact secondary battery module may include: (a) preparing a plurality of cells in which first and second leads having opposite polarities are bent in opposite directions, respectively; ; (b) a plurality of cartridges in which each cell is housed such that lead welds in which the first lead of one of the neighboring cells and the second lead of the other cell are collinear on the cartridge side wall are formed on the cartridge side wall; Stacking them to form a cartridge assembly; (c) assembling a sensing housing with a plurality of bus bars on the side of the cartridge assembly, the plurality of bus bars being capable of simultaneously facing each corresponding first and second leads; And (d) welding each bus bar at different welding points corresponding to the first lead and the second lead.
- the partition wall is formed on each side of the cartridge.
- 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.
- a secondary battery pack including the compact secondary battery modules according to the method described above.
- the electrode terminal welding method of the compact secondary battery module and the compact 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 with the bus bar attached to the side of the cartridge assembly, in particular, the order of the base materials in laser welding (eg, bus bar-aluminum lead, and bus).
- the welding quality of the sensing structure can be improved and the compact module can be constructed by welding the bar-copper lead separately at two welding points or welding the busbar-copper lead-aluminum lead at the same time.
- the damage of the lead can be prevented by applying a method 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.
- FIGS. 1 and 2 are exploded perspective views of the cartridge assembly portion shown in FIGS. 1 and 2.
- FIG. 4 is an enlarged perspective view of FIG. 3.
- FIG. 5 is an exploded perspective view of the sensing housing of FIG. 2.
- 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 partial sectional view showing a portion of a lead welded portion of a rechargeable battery module according to an exemplary embodiment of the present invention.
- FIG. 8 is a block diagram illustrating a compact secondary battery electrode lead welding method according to an exemplary embodiment of the present invention.
- FIG. 9 is a configuration diagram illustrating a compact secondary battery electrode lead welding method according to another exemplary embodiment of the present invention.
- 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, a sensing housing 30 coupled to the side of the cartridge assembly 20, for example, in one-touch form or snap-fit, hook form, and a plurality of bus bars 32 installed in the sensing housing 30. And a sensing cover 40 for protecting the BMS circuit board 34.
- a cartridge assembly in which a plurality of cartridges 10 containing respective cells 2 are stacked. 20
- a sensing housing 30 coupled to the side of the cartridge assembly 20, for example, in one-touch form or snap-fit, hook form, and a plurality of bus bars 32 installed in the sensing housing 30.
- a sensing cover 40 for protecting the BMS circuit board 34.
- 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.
- 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, the first leads 12 having a first polarity and made of, for example, aluminum
- a plurality of lead welds having a second polarity opposite to the first polarity and overlapping the second lead 14 made of, for example, copper, are positioned in a predetermined pattern on the sidewall of each cartridge 10.
- the cartridge assembly 20 has, for example, an upper cover 11 and a lower cover 13 which are 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 an excerpt perspective view of the cartridge assembly shown in FIGS. 1 and 2
- FIG. 4 is an enlarged perspective view of FIG. 3
- FIG. 5 is an excerpt perspective view of the sensing housing of FIG. 2.
- the sensing housing 30 is provided with a plurality of bus bars 32 corresponding to respective lead welds.
- 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 12 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 downward in the figure, and the second lead 14 is bent 90 degrees upward in the figure.
- the first lead 12 of one of the neighboring cells 2 extends from the bend by about half the length of the thickness of the cartridge 10,
- the second lead 14 of the other cell 2 extends about the other half the length of the thickness of the cartridge 10 such that the first lead 12 and the second lead 14 are flush with the lead weld.
- the ends thereof are disposed to be substantially in contact with each other or spaced at predetermined intervals.
- each of the corresponding bus bars 32 faces the first lead 12 and the second lead 14 simultaneously. And, for example, it can be welded at two welding points using a laser welder.
- This welding process first welds the bus bars 32 of the sensing housing 30 corresponding to the first leads 12 and then welds to the welding points of the bus bars 32 corresponding to the second leads 14.
- first lead 12, the second lead 14, and the corresponding bus bar 32 may be joined to each other by ultrasonic welding.
- the secondary battery module 100 may be compactly manufactured.
- the leads 12 and 14 of each cell 2 are bent at right angles from approximately 0.8 to 1.2 mm from the lead insulator 15 in a state of being housed in a corresponding cartridge. It is preferable.
- FIG. 7 is a partial cross-sectional view of a lead welded portion of a secondary battery module according to an exemplary embodiment of the present invention, the first lead 12 of the cells 2 neighboring each lead welded portion and
- the sensing housing 30 is coupled to the side of the cartridge assembly 20 in a state in which the second leads 14 are disposed to face each other side by side to form a secondary battery module 100, that is, the outside of the module 100, that is, ,
- the bus bar 32 and the first lead 12 and the second lead 14 face simultaneously in the direction from the direction in which the laser welding is performed to the cartridge assembly.
- welding between the bus bar 32 and the first leads 12 and between the bus bar 32 and the second leads 14 is substantially perpendicular to the sensing housing 30.
- each cartridge 10 When scanning the laser in the direction, 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 rechargeable battery module 100 has a BMS circuit board 34 and a bus bar with the sensing housing 30 coupled to the cartridge assembly 20.
- 32 illustrates a state in which the sensing cover 40 is coupled to the sensing housing 30 to protect the portion.
- Sensing cover 40 is preferably snap or hook coupled to the sensing housing 30, it is preferable that the injection molded by an insulating plastic material.
- the length of the first lead 12 is the length of the first lead 12 and the second lead 14 from the lead insulator 15, the cartridge 10 when the cell 2 is accommodated in the cartridge 10. It is preferable that it is approximately half of the width of).
- 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.
- each cell 2 is housed such that the lead welds are positioned in a predetermined pattern on the sidewall of the cartridge 10 such that the leads 12, 14 of opposite polarities of neighboring cells 2 face each other.
- a plurality of cartridges 10 are stacked to form a cartridge assembly 20.
- the first leads 12 and the first polarity 12 of opposite two polarities of the neighboring cells 2 are formed.
- the ends of the two leads 14 may be in contact with each other or may be spaced apart from each other, but in the lead weld, the first lead 12 and the second lead 14 are in the same plane.
- 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.
- Those skilled in the art will appreciate that and slots may be formed.
- 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.
- the sensing housing 30 is provided with a plurality of bus bars 32 corresponding to the respective lead welds so that the corresponding bus bars 32 may face the first lead 12 and the second lead 14. It is coupled to the side of the cartridge assembly 20 in the form of a hook or snap-fit.
- the first lead 12 is made of aluminum
- the second lead 14 and the bus bar 32 are made of copper.
- laser welding is performed at the two welding points of the first lead 12, the second lead 14, and the respective bus bars 32 of each lead welding portion.
- This step may use a welding system with two welding points of each bus bar 32, or may perform point welding several times using a separate laser welder with a welding point corresponding to either lead.
- 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
- FIG. 9 is a configuration diagram illustrating a compact secondary battery electrode lead welding method according to another exemplary embodiment of the present invention.
- the first lead 12 and the second lead 14 having opposite polarities of neighboring cells are provided.
- the second lead 14 faces the side wall of the cartridge 10 and the first lead 12 is positioned between the bus bar 32 and the second lead 14. That is, by constructing a lead welding part in this way, for example, when welding a lead welding part using a laser welding machine, the state where the bus bar 32, the 1st lead 12, and the 2nd lead 14 are sequentially located Can be welded at one point.
- the welding method according to the present embodiment since three base materials must be welded at the same time, it is preferable to use a power output of the welder stronger than the above-described embodiment in which only two base materials are welded.
- 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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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims (22)
- 이웃하는 셀들의 제1 리드와 제2 리드가 겹쳐지는 다수의 리드 용접부들이 카트리지 측벽에 미리 결정된 패턴으로 위치되고, 각각의 셀을 수납하면서 적층된 다수의 카트리지들을 포함하는 카트리지 조립체; 및각각의 리드 용접부에 상응하게 위치되어 용접될 수 있는 다수의 버스 바들이 마련되고 카트리지 조립체의 측면에 배치될 수 있는 센싱 하우징을 구비하고;카트리지 조립체에 센싱 하우징이 결합될 때, 카트리지의 측벽으로부터 외측 방향으로 제1 리드, 제2 리드 및 버스 바가 순차적으로 위치된 상태에서 버스 바의 방향에서 용접되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 이웃하는 셀의 리드의 끝단들이 실질적으로 동일선 상에 위치되어 다수의 리드 용접부들이 카트리지 측벽에 미리 결정된 패턴으로 형성되고, 각각의 셀을 수납하면서 적층된 다수의 카트리지들을 포함하는 카트리지 조립체; 및각각의 리드 용접부에 상응하게 위치되어 용접될 수 있는 다수의 버스 바들이 마련되고 카트리지 조립체의 측면에 배치될 수 있는 센싱 하우징을 구비하고;카트리지 조립체에 센싱 하우징이 결합될 때, 각각의 버스 바는 대응되는 셀의 제1 리드와 제1 리드와 반대되는 극성의 제2 리드에 서로 다른 용접 포인트에서 용접되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1 또는 청구항 2에 있어서,용접 작업시 셀을 보호하기 위해 각각의 카트리지의 측면에 마련된 격벽을 구비하는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1 또는 청구항 2에 있어서,각각의 셀의 리드는 상응하는 카트리지에 수납된 상태에서 리드 절연부로부터 대략 1mm 지점에서 직각으로 굴곡되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1 또는 청구항 2에 있어서,상기 용접은 레이저 용접인 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 5에 있어서,상기 레이저의 방향은 센싱 하우징에 실질적으로 수직인 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1 또는 청구항 2에 있어서,버스 바와 제2 리드는 구리로 제작되고, 제1 리드는 알루미늄으로 제작되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1 또는 청구항 2에 있어서,센싱 하우징은 각각의 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 8에 있어서,센싱 하우징은 카트리지 조립체에 스냅 또는 후크 결합되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 8에 있어서,센싱 하우징에 결합되는 센싱 커버를 더 구비하는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 10에 있어서,센싱 커버는 센싱 하우징에 스냅 또는 후크 결합되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1 또는 청구항 2에 있어서,카트리지 조립체의 이웃하는 2개의 카트리지들은 서로 후크 결합되는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- 청구항 1 또는 청구항 2에 있어서,카트리지 조립체는 양단의 카트리지에 각각 후크 결합되는 상부 커버와 하부 커버를 더 구비하는 것을 특징으로 하는 컴팩트한 이차전지 모듈.
- (a) 서로 반대되는 극성을 가진 제1 리드와 제2 리드가 반대 방향으로 각각 굴곡된 다수의 셀들을 준비하는 단계;(b) 이웃하는 셀들 중 어느 하나의 셀의 제1 리드가 카트리지 측벽에 면하고, 다른 하나의 셀의 제2 리드가 제1 리드에 면하도록 겹쳐지는 리드 용접부들이 카트리지 측벽에 미리 결정된 패턴으로 형성되도록 각각의 셀이 수납된 다수의 카트리지들을 적층시켜 카트리지 조립체를 형성하는 단계;(c) 각각의 제2 리드에 면할 수 있는 다수의 버스 바들이 마련된 센싱 하우징을 카트리지 조립체의 측면에 조립시키는 단계; 및(d) 각각의 버스 바, 이에 상응하는 제2 리드 및 제1 리드를 용접시키는 단계를 포함하는 것을 특징으로 하는 컴팩트한 이차전지 모듈의 전극 리드 용접 방법.
- (a) 서로 반대되는 극성을 가진 제1 리드와 제2 리드가 반대 방향으로 각각 굴곡된 다수의 셀들을 준비하는 단계;(b) 이웃하는 셀들 중 어느 하나의 셀의 제1 리드와 다른 하나의 셀의 제2 리드가 카트리지 측벽에서 동일 선상에 위치되는 리드 용접부들이 카트리지 측벽에 형성되도록 각각의 셀이 수납된 다수의 카트리지들을 적층시켜 카트리지 조립체를 형성하는 단계;(c) 대응되는 각각의 제1와 제2 리드에 동시에 면할 수 있는 다수의 버스 바들이 마련된 센싱 하우징을 카트리지 조립체의 측면에 조립시키는 단계; 및(d) 각각의 버스 바를 제1 리드와 제2 리드에 상응하는 서로 다른 용접점 에서 용접시키는 단계를 포함하는 것을 특징으로 하는 컴팩트한 이차전지 모듈의 전극 리드 용접 방법.
- 청구항 14 또는 청구항 15에 있어서,상기 (b) 단계에서, 각각의 카트리지 측면에 격벽을 형성시키는 것을 특징으로 하는 컴팩트한 이차전지 모듈의 전극 리드 용접 방법.
- 청구항 15 또는 청구항 15에 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 14 또는 청구항 15에 있어서,상기 (d) 단계는 레이저 용접기를 이용하는 것을 특징으로 하는 컴팩트한 이차전지 모듈의 전극 리드 용접 방법.
- 청구항 18에 있어서,레이저 용접기의 레이저 주사 방향은 센싱 하우징에 실질적으로 수직인 것을 특징으로 하는 컴팩트한 이차전지 모듈의 전극 리드 용접 방법.
- 청구항 14 또는 청구항 15에 있어서,버스 바와 제2 리드는 구리로 제작되고, 제1 리드는 알루미늄으로 제작되는 것을 특징으로 하는 컴팩트한 이차전지 모듈의 용접 방법.
- 청구항 14 또는 청구항 15의 방법에 의해 제조된 컴팩트한 이차전지 모듈.
- 청구항 21의 컴팩트한 이차전지 모듈을 포함하는 이차전지 팩.
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| US15/533,165 US10481208B2 (en) | 2014-12-24 | 2015-12-24 | Method for welding electrode leads of secondary battery module and compact secondary battery module using the same |
| JP2017528160A JP6440001B2 (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 |
| CN201580070251.XA CN107112484B (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 |
| EP15873695.9A EP3236512B1 (en) | 2014-12-24 | 2015-12-24 | Method for welding electrode leads of secondary battery module and compact secondary battery module using the same |
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| EP (1) | EP3236512B1 (ko) |
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- 2014-12-24 KR KR1020140188072A patent/KR101817236B1/ko active Active
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2015
- 2015-12-24 JP JP2017528160A patent/JP6440001B2/ja active Active
- 2015-12-24 US US15/533,165 patent/US10481208B2/en active Active
- 2015-12-24 CN CN201580070251.XA patent/CN107112484B/zh active Active
- 2015-12-24 EP EP15873695.9A patent/EP3236512B1/en active Active
- 2015-12-24 WO PCT/KR2015/014281 patent/WO2016105168A1/ko not_active Ceased
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| KR20090093222A (ko) * | 2008-02-29 | 2009-09-02 | 주식회사 엘지화학 | 전지모듈의 제조방법 및 중대형 전지팩 |
| KR20100109857A (ko) * | 2009-04-01 | 2010-10-11 | 주식회사 엘지화학 | 전압 검출부재 및 이를 포함하는 전지모듈 |
| KR20130076499A (ko) * | 2011-12-28 | 2013-07-08 | 에이치엘그린파워 주식회사 | 배터리모듈의 하우징 구조 |
| KR20130108691A (ko) * | 2012-03-26 | 2013-10-07 | 주식회사 엘지화학 | 신규한 구조의 전지모듈 어셈블리 |
| JP2014238938A (ja) * | 2013-06-06 | 2014-12-18 | 株式会社オートネットワーク技術研究所 | 蓄電モジュール |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018190235A1 (ja) * | 2017-04-12 | 2018-10-18 | パナソニックIpマネジメント株式会社 | 電池モジュールおよび蓄電ユニット |
| CN110521018A (zh) * | 2017-04-12 | 2019-11-29 | 松下知识产权经营株式会社 | 电池模块以及蓄电单元 |
| US20190006645A1 (en) * | 2017-06-30 | 2019-01-03 | Lg Electronics Inc. | Battery module |
| CN109216638A (zh) * | 2017-06-30 | 2019-01-15 | Lg电子株式会社 | 电池模块 |
| CN114865241A (zh) * | 2022-05-13 | 2022-08-05 | 星恒电源股份有限公司 | 一种电芯组、电池模组及组装方法 |
| CN114865241B (zh) * | 2022-05-13 | 2024-01-26 | 星恒电源股份有限公司 | 一种电芯组、电池模组及组装方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018503936A (ja) | 2018-02-08 |
| US10481208B2 (en) | 2019-11-19 |
| EP3236512B1 (en) | 2020-04-29 |
| JP6440001B2 (ja) | 2018-12-19 |
| KR20160077762A (ko) | 2016-07-04 |
| KR101817236B1 (ko) | 2018-01-11 |
| CN107112484A (zh) | 2017-08-29 |
| EP3236512A1 (en) | 2017-10-25 |
| EP3236512A4 (en) | 2018-05-09 |
| CN107112484B (zh) | 2020-04-28 |
| US20170343615A1 (en) | 2017-11-30 |
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