CN113555649A - Novel Busbar subassembly and use big module of soft packet of lithium cell of this subassembly - Google Patents
Novel Busbar subassembly and use big module of soft packet of lithium cell of this subassembly Download PDFInfo
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- CN113555649A CN113555649A CN202110921766.3A CN202110921766A CN113555649A CN 113555649 A CN113555649 A CN 113555649A CN 202110921766 A CN202110921766 A CN 202110921766A CN 113555649 A CN113555649 A CN 113555649A
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- busbar
- bus bar
- assembly
- cover plate
- battery cell
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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
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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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
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch 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
- H01M50/258—Modular batteries; Casings provided with means for assembling
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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
- H01M50/514—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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
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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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- 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
Abstract
The invention relates to a novel Busbar assembly, which comprises a Busbar assembly and a signal acquisition assembly, wherein the structural shape of the Busbar assembly is comb-shaped, the end part of comb teeth of the Busbar assembly is provided with a guide structure, a Y-shaped guide groove convenient for inserting a tab is formed in a gap between the guide structure and the comb teeth of the Busbar assembly, the bottom of the Busbar assembly is lapped on the bevel edge of a support piece of the Busbar assembly to provide stable support for tab welding, two ends of the Busbar assembly are respectively provided with a positive electrode leading-out piece and a negative electrode leading-out piece for leading out high voltage of a module, the signal acquisition assembly is fixed on the Busbar assembly through hot melting, and a nickel sheet of the signal acquisition assembly is welded on a Busbar of the Busbar assembly through laser; the invention also relates to a soft package lithium battery large module using the assembly; the invention has the advantages of simple and efficient assembly, safe assembly and no cold joint in tab welding.
Description
Technical Field
The invention belongs to the field of soft package lithium batteries, and particularly relates to a novel Busbar assembly and a large soft package lithium battery module using the same.
Background
The lithium ion battery has the advantages of light weight, large energy storage, large power, no pollution, long service life, small self-discharge coefficient, wide temperature application range and the like, is gradually favored by people, and gradually replaces other traditional batteries in the field of energy storage and power batteries.
With the development of new energy industry, the improvement of the safety and the energy density of the module is more and more concerned, the soft package lithium battery module is developed towards the direction of large scale and integration, the size consistency of the soft package lithium battery is difficult to ensure, and the penetration of a bus bar is difficult; when the lugs penetrate into the busbar, the lugs are easily bent together to cause short circuit ignition, so that great short circuit risk exists; the lead-out position of the tab is an aluminum plastic film, so that the tab is difficult to provide effective support during tab welding, the condition of insufficient welding is easy to occur during welding, and the safety of the product is influenced; in conclusion, the invention designs the Busbar assembly which is simple and efficient to assemble, safe to assemble and free of cold welding during tab welding and the large soft package lithium battery module using the Busbar assembly.
Disclosure of Invention
The invention aims to solve the problems, and provides a novel Busbar component and a soft-package lithium battery large module using the same, which have the advantages of simple and efficient assembly, safe assembly and no cold welding of tab welding.
The purpose of the invention is realized as follows: the utility model provides a novel Busbar subassembly, it includes Busbar subassembly and signal acquisition subassembly, the structural shape of Busbar subassembly is the comb shape, the broach tip of Busbar subassembly is equipped with guide structure, guide structure with the broach clearance of Busbar subassembly is formed with the Y type guide way that is convenient for insert utmost point ear, and the bottom overlap joint of Busbar subassembly provides stable support for utmost point ear welding on Busbar subassembly support piece's bevel, the both ends of Busbar subassembly are respectively for being used for drawing forth the highly compressed positive piece and the negative pole piece of drawing forth of module, the signal acquisition subassembly passes through the hot melt to be fixed on the Busbar subassembly, the nickel piece of signal acquisition subassembly passes through laser welding on the Busbar of Busbar subassembly.
The utility model provides a big module of soft packet of lithium cell, it includes electric core, lower apron, bus bar subassembly and upper cover plate, the electric core is through piling up the constitution module, is located the outside the electric core bonds through bubble cotton double faced adhesive tape has module fixed end plate, the upside fixedly connected with two bus bar subassembly support piece of apron down, after the pile the electric core bond in the upside of apron down and be located the space that two bus bar subassembly support piece formed, the assembly of bus bar subassembly is in the outside of electric core, the upper cover plate bond in the electric core upside and with bus bar subassembly fixed connection, the bus bar subassembly includes Busbar subassembly and signal acquisition subassembly, the structural shape of Busbar subassembly is the comb shape, the broach tip of Busbar subassembly is equipped with guide structure, guide structure with the broach clearance of Busbar subassembly is formed with the Y type guide way that is convenient for inserting utmost point ear, the bottom overlap joint of Busbar subassembly provides stable support for utmost point ear welding on bus bar subassembly support piece's bevel, the both ends of Busbar subassembly are for being used for drawing out the highly compressed positive pole of module and draw out the piece respectively, the signal acquisition subassembly passes through the hot melt to be fixed on the Busbar subassembly, the nickel piece of signal acquisition subassembly passes through laser welding on the Busbar of Busbar subassembly.
The battery module comprises a battery cell and is characterized in that the battery cell is inserted into a guide structure of a Busbar assembly from top to bottom through a Y-shaped guide groove, slots corresponding to a positive leading-out piece and a negative leading-out piece of the Busbar assembly are formed in a module fixing end plate, clamping holes are formed in the slots, a buckle is arranged on the positive leading-out piece of the battery cell, and the battery cell is correspondingly clamped in the clamping holes of the slots through the buckle to complete integrated assembly with the battery cell.
And the tabs inserted into the guide structures are bent and then are subjected to laser welding under the support of the Busbar component support piece, so that the parallel connection and the series connection of the battery cells are realized.
The battery cell is the soft-packaged battery cell with lugs at two ends, the battery cell is stacked in series-parallel connection to form a battery cell unit, the battery cell unit is stacked to form a module, adjacent battery cells are bonded together through foam double-faced adhesive tapes, and the adjacent battery cell unit is connected with a heat insulation plate.
The side edge of the lower battery cell of the battery cell is bonded on the lower cover plate through heat-conducting structure glue, and the upper cover plate is bonded with the side edge of the upper battery cell of the battery cell through the heat-conducting structure glue.
The bus bar component supporting piece is provided with a first positioning pin, the side edge of the bottom of the lower cover plate is of a U-shaped structure, a hole position corresponding to the first positioning pin is arranged on the U-shaped structure, and the bus bar component supporting piece is correspondingly connected with the lower cover plate through the first positioning pin and the hole position.
The side edge of the lower cover plate is provided with an upward lower cover plate flanging, a mica plate is clamped between the lower cover plate flanging and the Busbar component, the side edge of the upper cover plate is provided with a downward upper cover plate flanging, and the upper cover plate flanging is clamped at the upper part of the mica plate.
The bus bar assembly is provided with a second positioning pin, the upper cover plate is provided with a positioning hole corresponding to the second positioning pin, and the bus bar assembly is correspondingly connected with the upper cover plate through the positioning hole and the second positioning pin.
The upper cover plate is connected with the Busbar component and the lower cover plate is connected with the Busbar component supporting piece and is fixedly connected with the module fixing end plate through laser welding.
The invention has the beneficial effects that: according to the novel Busbar assembly and the large soft-package lithium battery module using the same, 1, the problem that a Busbar is difficult to penetrate after the soft-package lithium batteries are stacked is solved, so that the Busbar is simple and efficient to assemble; 2. the guide structure of the lug penetrating busbar assembly avoids the connection short circuit when the lug penetrates, so that the series and parallel connection of the battery cells are very safe; 3. busbar subassembly and Busbar subassembly support piece divide and block respectively on the frock through corresponding locating pin during utmost point ear welding for utmost point ear welds very strong holding power occasionally, has avoided utmost point ear because the rosin joint that can't compress tightly the result in makes this key process of module utmost point ear welding more reliable.
Drawings
Fig. 1 is a schematic diagram of cell stacking of a large module of a soft-package lithium battery according to the present invention;
FIG. 2 is a schematic view of the assembly of the lower cover plate of a large module of a soft-package lithium battery according to the present invention;
FIG. 3 is a schematic structural view of a novel Busbar assembly of the present invention;
FIG. 4 is a schematic view of the Busbar assembly of the present invention;
FIG. 5 is a schematic view of the mica plate assembly of the large soft package lithium battery module of the present invention;
FIG. 6 is a schematic view of the assembly of the upper cover plate of a large module of a soft-package lithium battery according to the present invention;
FIG. 7 is a schematic diagram of the welding of the upper cover plate and the lower cover plate with the module fixing end plate of the large module of the soft-package lithium battery of the present invention;
in the figure, 1-1 part, 1-2 parts of an electric core, 1-3 parts of foam double-sided adhesive, 1-4 parts of a heat insulation board, 2-1 parts of a module fixing end plate, 2-2 parts of a lower cover plate, 2-3 parts of hole sites, 2-4 parts of a Busbar component supporting piece, 2-5 parts of a first positioning pin, 2-6 parts of the side edge of a lower electric core, 2-7 parts of heat conducting structure adhesive, 3-1 parts of a space, 3-1 parts of a Busbar component, 3-2 parts of a guide structure, 3-3 parts of a Y-shaped guide groove, 3-5 parts of the bottom, 3-6 parts of a bevel edge positive electrode leading-out piece, 3-8 parts of a negative electrode leading-out piece, 3-9 parts of a signal acquisition component, 3-10 parts of hot melting, 4-1 parts of a nickel sheet, 4-2 parts of a tab, 4-3 parts of a slot, 4-4 parts of buckles, 5-1 parts of clamp holes, 5-2 parts of mica plates, 6-1 parts of lower cover plate flanges, 6-2 parts of upper cover plates, 6-3 parts of heat conduction structural adhesive, 6-4 parts of upper battery cell side edges, 6-5 parts of upper cover plate flanges, 6-6 parts of positioning holes, 7 parts of second positioning pins and laser welding.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
Example 1
As shown in FIG. 3, a novel Busbar assembly 3 comprises a Busbar assembly 3-1 and a signal acquisition assembly 3-8, wherein the Busbar assembly 3-1 is comb-shaped, a guide structure 3-2 is arranged at the end part of comb teeth of the Busbar assembly 3-1, a Y-shaped guide groove 3-3 convenient for inserting a tab 4-1 is formed in the gap between the guide structure 3-2 and the comb teeth of the Busbar assembly 3-1, the bottom 3-4 of the Busbar assembly 3-1 is lapped on the bevel edge 3-5 of a support 2-3 of the Busbar assembly to provide stable support for welding the tab 4-1, two ends of the Busbar assembly 3-1 are respectively a positive electrode lead-out piece 3-6 and a negative electrode lead-out piece 3-7 for leading out module high voltage, and the signal acquisition assembly 3-8 is fixed on the Busbar assembly 3-8 through a hot melt 3-9 1, the nickel sheets 3-10 of the signal acquisition assemblies 3-8 are welded 7 on the bus bar of the bus bar assembly 3-1 by laser to realize signal acquisition.
As shown in fig. 4, a buckle 4-3 is arranged on the positive electrode leading-out piece 3-6 of the Busbar assembly 3, and the buckle 4-3 corresponds to a clamping hole 4-4 on the module fixing end plate 1-4 fixed at the two ends of the stacked battery cells 1-1.
When the novel Busbar component 3 is assembled with the battery core 1-1, firstly, the lug 4-1 of the battery core 1-1 is inserted into the guide structure 3-2 of the Busbar component 3-1 through the Y-shaped guide groove 3-3 from top to bottom until the bottom 3-4 of the Busbar component 3-1 is pressed against the Busbar component supporting piece 2-3, then the Busbar component 3 is correspondingly clamped on the clamping hole 4-4 through the buckle 4-3, the assembling connection of the Busbar component 3 and the battery core 1-1 is completed, and finally, the lug 4-1 inserted into the guide structure 3-2 is bent and then is subjected to laser welding 7 under the support of the Busbar component supporting piece 2-3, so that the parallel connection and the serial connection of the battery core 1-1 are realized.
According to the novel Busbar component 3, the structure of the Busbar component 3-1 is optimized to be a comb-shaped structure, the guide structure 3-2 is arranged at the end part of the comb teeth of the Busbar component 3-1, so that the lug 4-1 can correspondingly penetrate into the guide structure 3-2, the situation that the lug 4-1 is in short circuit connection during penetration is avoided, and the series-parallel connection safety of the battery cell 1-1 is ensured; according to the novel Busbar component 3, the Y-shaped guide groove 3-3 is formed in the gap between the guide structure 3-2 and the comb teeth of the Busbar component 3-1, so that when the Busbar component 3 is assembled with the battery cell 1-1 from top to bottom, the tab 4-1 of the battery cell 1-1 can be easily inserted into the guide structure 3-2, the problem that the Busbar is difficult to penetrate after soft-package lithium batteries are stacked is solved, and the assembly is simpler and more efficient; according to the novel Busbar component 3, the bottom 3-4 of the Busbar component 3-1 is lapped on the bevel edge 3-5 of the Busbar component supporting piece 2-3, and the tab 4-1 inserted into the guide structure 3-2 is easier to be subjected to laser welding 7 under the support of the Busbar component supporting piece 2-3, so that the condition of tab cold welding is effectively avoided; the invention has the advantages of simple and efficient assembly, safe assembly and no cold joint in tab welding.
Example 2
As shown in fig. 1-7, a large module of a soft package lithium battery comprises an electric core 1-1, a lower cover plate 2-1, a buss bar assembly 3 and an upper cover plate 6-1, wherein the electric core 1-1 is stacked to form the module, the electric core 1-1 positioned at the outermost side is bonded with a module fixing end plate 1-4 through a foam double faced adhesive tape 1-2, the upper side of the lower cover plate 2-1 is fixedly connected with two buss bar assembly supporting pieces 2-3, the stacked electric core 1-1 is bonded at the upper side of the lower cover plate 2-1 and positioned in a space 2-7 formed by the two buss bar assembly supporting pieces 2-3, the buss bar assembly 3 is assembled at the outer side of the electric core 1-1, the upper cover plate 6-1 is bonded at the upper side of the electric core 1-1 and fixedly connected with the buss bar assembly 3, the bus bar component 3 comprises a bus bar component 3-1 and a signal acquisition component 3-8, the bus bar component 3-1 is comb-shaped in structural shape, a guide structure 3-2 is arranged at the end part of comb teeth of the bus bar component 3-1, a Y-shaped guide groove 3-3 convenient for inserting a lug 4-1 is formed in a gap between the guide structure 3-2 and the comb teeth of the bus bar component 3-1, the bottom 3-4 of the bus bar component 3-1 is lapped on the bevel edge 3-5 of the bus bar component support part 2-3 to provide stable support for welding the lug 4-1, two ends of the bus bar component 3-1 are respectively a positive electrode leading-out part 3-6 and a negative electrode leading-out part 3-7 for leading out module high voltage, the signal acquisition component 3-8 is fixed on the bus bar component 3-1 through hot melting 3-9, the nickel sheets 3-10 of the signal acquisition assembly 3-8 are welded 7 on the bus bar of the bus bar assembly 3-1 by laser to realize signal acquisition.
The Busbar assembly 3 of embodiment 1 is used in a soft package lithium battery large module, and the assembly sequence of the module is described in detail below with reference to the attached drawings.
1) Stacking the battery cells 1-1; the battery cell 1-1 is a soft-packaged battery cell with tabs at two ends, the battery cells 1-1 are stacked in series and parallel to form a battery cell unit, the battery cell unit is stacked to form a module, adjacent battery cells 1-1 are bonded together through foam double-sided adhesive tapes 1-2, the adjacent battery cell units are connected with thermal insulation boards 1-3, and the battery cell 1-1 located at the outermost side is bonded with module fixing end plates 1-4 through the foam double-sided adhesive tapes 1-2, as shown in fig. 1.
2) Assembling a lower cover plate 2-1; the battery cell support piece is characterized in that a first positioning pin 2-4 is arranged on the Busbar component support piece 2-3, the bottom side edge of the lower cover plate 2-1 is of a U-shaped structure, a hole site 2-2 corresponding to the first positioning pin 2-4 is arranged on the U-shaped structure, the Busbar component support piece 2-3 is correspondingly connected with the lower cover plate 2-1 through the first positioning pin 2-4 and the hole site 2-2, and the lower battery cell side edge 2-5 of the battery cell 1-1 is bonded on the lower cover plate 2-1 through a heat conduction structural adhesive 2-6 and is located in a space 2-7 formed by the two Busbar component support pieces 2-3, as shown in fig. 2.
3) Preparing a Busbar component 3; the bus bar component 3 comprises a bus bar component 3-1 and a signal acquisition component 3-8, the bus bar component 3-1 is comb-shaped in structural shape, a guide structure 3-2 is arranged at the end part of comb teeth of the bus bar component 3-1, a Y-shaped guide groove 3-3 convenient for inserting a lug 4-1 is formed in a gap between the guide structure 3-2 and the comb teeth of the bus bar component 3-1, the bottom 3-4 of the bus bar component 3-1 is lapped on the bevel edge 3-5 of the bus bar component support part 2-3 to provide stable support for welding the lug 4-1, two ends of the bus bar component 3-1 are respectively a positive electrode leading-out part 3-6 and a negative electrode leading-out part 3-7 for leading out module high voltage, the signal acquisition component 3-8 is fixed on the bus bar component 3-1 through hot melting 3-9, the nickel sheets 3-10 of the signal acquisition assembly 3-8 are welded on the bus bar of the bus bar assembly 3-1 through laser to realize signal acquisition, as shown in fig. 3.
4) Assembling the Busbar assembly 3; the battery module 3 inserts a tab 4-1 of a battery core 1-1 into a guide structure 3-2 of a Busbar module 3-1 from top to bottom through a Y-shaped guide groove 3-3, a module fixing end plate 1-4 is provided with a slot 4-2 corresponding to an anode leading-out piece 3-6 and a cathode leading-out piece 3-7 of the Busbar module 3-1, the slot 4-2 is provided with a clamping hole 4-4, the anode leading-out piece 3-6 of the Busbar module 3 is provided with a buckle 4-3, the anode leading-out piece 3-6 and the cathode leading-out piece 3-7 of the Busbar module 3-1 are correspondingly inserted into the slot 4-2 of the module fixing end plate 1-4 until the buckle 4-3 of the Busbar module 3 is correspondingly clamped in the clamping hole 4-4 of the slot 4-2, the integrated assembly of the Busbar component 3 is completed, the operation is simple and efficient, as shown in figure 4, the Busbar component is bent and inserted into a tab 4-1 of the guide structure 3-2, and laser welding is carried out under the support of the Busbar component support piece 2-3, so that parallel connection and series connection of the battery cells 1-1 are realized.
5) Assembling a mica plate 5-1; an upward lower cover plate flanging 5-2 is arranged on the side edge of the lower cover plate 2-1, and a mica plate 5-1 is clamped between the lower cover plate flanging 5-2 and the Busbar component 3, as shown in FIG. 5.
6) Assembling an upper cover plate 6-1; the upper cover plate 6-1 is bonded with an upper cell side edge 6-3 of the cell 1-1 through a heat conduction structural adhesive 6-2, the buss bar assembly 3 is provided with a second positioning pin 6-6, the upper cover plate 6-1 is provided with a positioning hole 6-5 corresponding to the second positioning pin 6-6, the buss bar assembly 3 is correspondingly connected with the upper cover plate 6-1 through the positioning hole 6-5 and the second positioning pin 6-6, the side edge of the upper cover plate 2-1 is provided with a downward upper cover plate flanging 6-4, and the upper cover plate flanging 6-4 is clamped on the upper portion of the mica plate 5-1 during assembly, as shown in fig. 6.
7) Welding and fixing the module; the upper cover plate 6-1 connected with the Busbar component 3 and the lower cover plate 2-1 connected with the Busbar component support 2-3 are fixedly connected with the module fixing end plate 1-4 through laser welding 7, and module assembly is completed, as shown in fig. 7.
The invention provides a large module of a soft package lithium battery, which adopts a Busbar component 3 with an optimized structure, not only solves the problem that a bus bar is difficult to penetrate after the soft package lithium battery is stacked, and ensures that the assembly of the bus bar is simple and efficient, but also ensures that a tab 4-1 penetrates into a guide structure 3-2 of the bus bar component 3-1 to avoid the connection short circuit when the tab 4-1 penetrates, so that the electrical core 1-1 is connected in series and in parallel very safely, in addition, when the tab 4-1 is welded, a Busbar component supporting piece 2-3 is fixed on a lower cover plate 2-1 through a first positioning pin 2-4, the Busbar component 3 is lapped on the Busbar component supporting piece 2-3 and is correspondingly clamped in a clamping hole 4-4 through a buckle 4-3 to be fixedly connected with a module fixing end plate 1-4, so that the tab 4-1 has very strong supporting force when being welded, the cold joint caused by the fact that the pole lug 4-1 cannot be compressed is avoided, and the key process of welding the module pole lug is more reliable; the battery cell 1-1 is bonded with the upper cover plate 6-1 and the lower cover plate 2-1 by adopting the heat-conducting structural adhesive 2-6, so that the heat conduction and fixation of the battery cell 1-1 can be realized; according to the invention, the mica plate 5-1 is clamped between the Busbar component 3 and the upper cover plate 6-1 and the lower cover plate 2-1, so that the external insulation of the module and the thermal spread of the module in thermal runaway can be realized; the invention has the advantages of simple and efficient assembly, safe assembly and no cold joint in tab welding.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a novel Busbar subassembly, it includes Busbar subassembly and signal acquisition subassembly, its characterized in that: the structural shape of Busbar subassembly is the comb shape, the broach tip of Busbar subassembly is equipped with guide structure, guide structure with the broach clearance of Busbar subassembly is formed with the Y type guide way of being convenient for insert utmost point ear, and the bottom overlap joint of Busbar subassembly provides stable support for utmost point ear welding on bus bar support piece's bevel, the both ends of Busbar subassembly are respectively for being used for drawing out the highly compressed positive pole of module and the negative pole piece of drawing out, the signal acquisition subassembly passes through the hot melt to be fixed on the Busbar subassembly, the nickel piece of signal acquisition subassembly passes through laser welding on the Busbar of Busbar subassembly.
2. The utility model provides a big module of soft packet of lithium cell, it includes electric core, lower apron, bus bar subassembly and upper cover plate, its characterized in that: the battery cell is stacked to form a module, the battery cell positioned at the outermost side is bonded with a module fixing end plate through a foam double-faced adhesive tape, the upper side of the lower cover plate is fixedly connected with two bus bar component supporting pieces, the stacked battery cell is bonded at the upper side of the lower cover plate and positioned in a space formed by the two bus bar component supporting pieces, the bus bar component is assembled at the outer side of the battery cell, the upper cover plate is bonded at the upper side of the battery cell and fixedly connected with the bus bar component, the bus bar component comprises a bus bar component and a signal acquisition component, the structural shape of the bus bar component is a comb shape, the comb tooth end part of the bus bar component is provided with a guide structure, the guide structure and the comb tooth gap of the bus bar component are formed with a Y-shaped guide groove convenient for inserting a tab, and the bottom of the bus bar component is lapped at the bevel edge of the bus bar component supporting pieces to provide stable support for tab welding, the high-voltage bus bar comprises a bus bar assembly, a signal acquisition assembly and a laser welding assembly, wherein the bus bar assembly is provided with a positive electrode leading-out piece and a negative electrode leading-out piece which are used for leading out high voltage of a module respectively at two ends, the signal acquisition assembly is fixed on the bus bar assembly through hot melting, and a nickel sheet of the signal acquisition assembly is welded on a bus bar of the bus bar assembly through laser.
3. The big soft package lithium battery module as claimed in claim 2, wherein: the battery module comprises a battery cell and is characterized in that the battery cell is inserted into a guide structure of a Busbar assembly from top to bottom through a Y-shaped guide groove, slots corresponding to a positive leading-out piece and a negative leading-out piece of the Busbar assembly are formed in a module fixing end plate, clamping holes are formed in the slots, a buckle is arranged on the positive leading-out piece of the battery cell, and the battery cell is correspondingly clamped in the clamping holes of the slots through the buckle to complete integrated assembly with the battery cell.
4. The big soft package lithium battery module as claimed in claim 3, wherein: and the tabs inserted into the guide structures are bent and then are subjected to laser welding under the support of the Busbar component support piece, so that the parallel connection and the series connection of the battery cells are realized.
5. The big soft package lithium battery module as claimed in claim 2, wherein: the battery cell is the soft-packaged battery cell with lugs at two ends, the battery cell is stacked in series-parallel connection to form a battery cell unit, the battery cell unit is stacked to form a module, adjacent battery cells are bonded together through foam double-faced adhesive tapes, and the adjacent battery cell unit is connected with a heat insulation plate.
6. The big soft package lithium battery module as claimed in claim 2, wherein: the side edge of the lower battery cell of the battery cell is bonded on the lower cover plate through heat-conducting structure glue, and the upper cover plate is bonded with the side edge of the upper battery cell of the battery cell through the heat-conducting structure glue.
7. The big soft package lithium battery module as claimed in claim 2, wherein: the bus bar component supporting piece is provided with a first positioning pin, the side edge of the bottom of the lower cover plate is of a U-shaped structure, a hole position corresponding to the first positioning pin is arranged on the U-shaped structure, and the bus bar component supporting piece is correspondingly connected with the lower cover plate through the first positioning pin and the hole position.
8. The big soft package lithium battery module as claimed in claim 2, wherein: the side edge of the lower cover plate is provided with an upward lower cover plate flanging, a mica plate is clamped between the lower cover plate flanging and the Busbar component, the side edge of the upper cover plate is provided with a downward upper cover plate flanging, and the upper cover plate flanging is clamped at the upper part of the mica plate.
9. The big soft package lithium battery module as claimed in claim 2, wherein: the bus bar assembly is provided with a second positioning pin, the upper cover plate is provided with a positioning hole corresponding to the second positioning pin, and the bus bar assembly is correspondingly connected with the upper cover plate through the positioning hole and the second positioning pin.
10. The big soft package lithium battery module as claimed in claim 2, wherein: the upper cover plate is connected with the Busbar component and the lower cover plate is connected with the Busbar component supporting piece and is fixedly connected with the module fixing end plate through laser welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110921766.3A CN113555649A (en) | 2021-08-11 | 2021-08-11 | Novel Busbar subassembly and use big module of soft packet of lithium cell of this subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110921766.3A CN113555649A (en) | 2021-08-11 | 2021-08-11 | Novel Busbar subassembly and use big module of soft packet of lithium cell of this subassembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113555649A true CN113555649A (en) | 2021-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110921766.3A Pending CN113555649A (en) | 2021-08-11 | 2021-08-11 | Novel Busbar subassembly and use big module of soft packet of lithium cell of this subassembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709547A (en) * | 2022-01-27 | 2022-07-05 | 浙江锋锂新能源科技有限公司 | Lithium metal negative electrode solid-state battery module |
| GB2608235A (en) * | 2021-04-30 | 2022-12-28 | Caterpillar Inc | Housing for securing battery cells in a battery module |
-
2021
- 2021-08-11 CN CN202110921766.3A patent/CN113555649A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2608235A (en) * | 2021-04-30 | 2022-12-28 | Caterpillar Inc | Housing for securing battery cells in a battery module |
| CN114709547A (en) * | 2022-01-27 | 2022-07-05 | 浙江锋锂新能源科技有限公司 | Lithium metal negative electrode solid-state battery module |
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