CN111525057A - Round soft-package polymer lithium ion battery and assembly method - Google Patents

Round soft-package polymer lithium ion battery and assembly method Download PDF

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Publication number
CN111525057A
CN111525057A CN202010199574.1A CN202010199574A CN111525057A CN 111525057 A CN111525057 A CN 111525057A CN 202010199574 A CN202010199574 A CN 202010199574A CN 111525057 A CN111525057 A CN 111525057A
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China
Prior art keywords
positive
battery
negative
negative electrode
soft
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Granted
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CN202010199574.1A
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Chinese (zh)
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CN111525057B (en
Inventor
王晓丽
缪东芳
张志强
张育铭
石漪桥
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Tianjin Juyuan New Energy Technology Co ltd
Tianjin Lishen Battery JSCL
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Tianjin Lishen Battery JSCL
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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
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M10/058—Construction or manufacture
    • 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
    • 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
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention discloses a round soft-packaged polymer lithium ion battery which comprises a round soft-packaged polymer battery cell, an anode lead assembly, a cathode lead assembly, an injection molding bracket and a side protection adhesive tape, wherein the round soft-packaged polymer battery cell comprises a body; the upper end and the lower end of the body are respectively provided with a positive electrode front edge and a negative electrode front edge; the positive electrode lug and the negative electrode lug are respectively connected with the upper end and the lower end of the body; the top surface and the bottom surface of the body are respectively provided with a positive pole tab glue and a negative pole tab glue; the edge sealing is wrapped with a side protective adhesive tape; the negative electrode lug is welded with the negative electrode lead assembly; the positive lug is welded with the positive lead assembly; the positive lead assembly is bonded with the support protective adhesive tape and clamped at one end of the injection molding support; the negative pole wire assembly card is at the other end of the support of moulding plastics. According to the invention, the design of the injection molding bracket and the battery fixing clamp is introduced into the battery assembly structure, so that the reliability of the assembly structure is ensured powerfully, the large-area direct contact between the hands of operators and the battery is avoided, and the yield is greatly improved.

Description

Round soft-package polymer lithium ion battery and assembly method
Technical Field
The invention relates to the technical field of round soft-package polymer lithium ion batteries, in particular to a round soft-package polymer lithium ion battery and an assembly method thereof.
Background
Currently, lithium ion batteries are increasingly used in various portable mobile device fields, such as electronic pens, bluetooth headsets, electronic cigarettes, and the like. In some handheld or portable mobile devices, the battery is larger and easier to operate, and during the assembly process, the operator needs to directly contact the battery with hands in each process, but due to the development trend of miniaturization of the device, the battery is required to be smaller, and the smaller battery inevitably causes difficulty in assembly, if the conventional method is continued: the hand of an operator in each process is required to be in direct contact with the battery in a large area, so that the risks of scratches, pits, liquid leakage and the like on the surface of the battery are inevitably caused, the yield of the circular soft package polymer lithium ion finished battery for processing and assembling (pack) is seriously reduced, and the economic benefit of a battery manufacturer is damaged.
Disclosure of Invention
The invention aims to provide a circular soft-package polymer lithium ion battery and an assembly method thereof, aiming at the technical defects in the prior art.
Therefore, the invention provides a round soft-package polymer lithium ion battery which comprises
Round soft packet of polymer electricity core, anodal wire assembly, negative pole wire assembly, the support of moulding plastics, side protection sticky tape, wherein:
the round soft-packaged polymer battery cell comprises a positive electrode tab, a negative electrode tab, an edge seal, a body, a positive electrode front edge, a negative electrode front edge, a positive electrode tab glue, a negative electrode tab glue and a battery cell two-dimensional verification code sprayed with detailed information of the battery cell;
the upper end and the lower end of the body are respectively provided with a positive electrode front edge and a negative electrode front edge;
the positive electrode lug and the negative electrode lug are respectively connected with the central positions of the upper end and the lower end of the body;
the top surface and the bottom surface of the body are respectively provided with a positive pole tab glue and a negative pole tab glue;
the side surface of the body is provided with a vertically distributed sealing edge and a battery cell two-dimensional verification code;
wherein, the edge sealing of the round soft-packaged polymer battery cell is wrapped with a side protective adhesive tape;
the negative electrode lug in the round soft-packaged polymer battery cell is welded with the negative electrode lead assembly;
the positive lug in the round soft-packaged polymer battery cell is welded with the positive lead assembly;
the positive lead assembly is bonded with the support protective adhesive tape and clamped at one end of the injection molding support;
and the negative lead assembly is clamped at the other end of the injection molding support.
Wherein, the outer wall of the body is wrapped with a label;
the front edge protective adhesive tape is bonded on the front edge of the negative electrode in the round soft-packaged polymer battery cell;
the positive electrode protective adhesive tape is wrapped on the front edge of the positive electrode in the round soft-packaged polymer battery cell;
and a support protective adhesive tape is stuck on the injection-molded support.
Wherein, around the injection molding bracket, a circle of negative electrode protection adhesive tape is wound.
Wherein, anodal wire assembly includes anodal wire and anodal nickel piece, wherein:
the positive electrode lead is welded with one end of the positive electrode nickel sheet;
and the positive lead is bonded on the support protective adhesive tape.
Wherein, negative pole wire assembly includes negative pole wire and negative pole nickel piece, wherein:
the negative electrode lead is welded with one end of the negative electrode nickel sheet;
the negative nickel sheet is provided with a bending groove.
Wherein, the support of moulding plastics includes anodal lateral wall, negative pole lateral wall, anodal draw-in groove, negative pole draw-in groove and leading edge draw-in groove, wherein:
the front edge clamping groove is positioned at the front end of the injection molding bracket body;
the left side and the right side of the front edge clamping groove are respectively provided with an inwards concave negative side wall and an inwards concave positive side wall;
the left side and the right side of the front part of the injection molding bracket body are respectively provided with a negative clamping groove and a positive clamping groove;
the positive clamping groove is used for clamping a positive lead in the positive lead assembly;
and the negative clamping groove is used for clamping the black lead in the negative lead assembly.
Wherein, also include the battery fixing clamp;
the battery fixing clamp is used for fixedly placing the round soft-packaged polymer battery cell;
battery mounting fixture includes battery fixing compartment, sucking disc, battery ejector pad and ejector pad pivot, wherein:
the concave battery fixing bin is positioned at the top of the battery fixing clamp, and the shape and size of the concave battery fixing bin are correspondingly matched with those of a round soft-packaged polymer battery cell to be placed;
the left end and the right end of the battery fixing bin are opened, and a battery push block is installed on the rear side of the battery fixing bin.
The front side surface and the right side surface of the battery fixing clamp body are respectively provided with two suckers;
the battery fixing clamp body is internally provided with push block rotating shafts which are transversely distributed;
the push block rotating shaft transversely penetrates through the battery push block;
the battery push block is hinged with the battery fixing clamp body through a push block rotating shaft.
In addition, the invention also provides an assembly method of the round soft-package polymer lithium ion battery, which comprises the following steps:
firstly, placing a circular soft-packaged polymer battery cell in a battery fixing clamp, and then keeping the placing state of the circular soft-packaged polymer battery cell in the battery fixing clamp unchanged when each process is carried out;
then wrapping a side protective adhesive tape on the edge sealed of the round soft-packaged polymer battery cell to prevent the edge sealed by the battery cell from metal leakage to cause short circuit;
then, welding the negative electrode lug of the round soft-packaged polymer battery cell and the negative electrode lead assembly through a spot welding machine;
then, folding the negative electrode lead assembly in a 180-degree manner along a bending groove in the negative electrode lead assembly, then folding the negative electrode lead assembly in a 180-degree manner along the root of the negative electrode tab glue,
then, 180-degree double folding is carried out at the bottom of the front edge of the negative electrode;
then, sticking a support protective tape on the side wall of the anode on the injection molding support for subsequently sticking the anode lead of the anode lead assembly;
then, the front edge protective adhesive tape is stuck on the front edge of the negative electrode of the round soft-packaged polymer battery cell;
then, buckling a front edge clamping groove of the injection molding bracket, which is stuck with a bracket protective adhesive tape, on the front edge protective adhesive tape of the battery, and clamping a negative lead in the negative lead assembly in a negative clamping groove of the injection molding bracket;
then, welding an anode tab of the round soft-packaged polymer battery cell and an anode lead assembly through laser welding equipment, and bending the anode tab and the anode lead assembly by 180 degrees along the root of an anode tab glue, so that an anode lead of the anode lead assembly is adhered to a support protective adhesive tape, and the anode lead is clamped in an anode clamping groove of an injection-molded support;
then, wrapping the label on the body of the round soft-packaged polymer battery cell;
then wrapping the positive electrode protective adhesive tape on the front edge of the positive electrode of the round soft-packaged polymer battery cell;
and then, winding the negative electrode protection adhesive tape on an injection molding support, and sticking for a circle, thereby finally obtaining a finished product battery of the round polymer lithium ion battery.
Compared with the prior art, the invention provides the circular soft-package polymer lithium ion battery and the assembly method thereof, and the design of the injection molding bracket and the battery fixing clamp is introduced into the assembly structure (pack structure) and the assembly process (method) of the battery, so that the reliability of the assembly structure is ensured powerfully, the large-area direct contact between the hands of operators and the battery is avoided, the risks of scratches, pits, liquid leakage and the like generated on the surface of the finished battery are reduced, the yield of the circular soft-package polymer lithium ion battery in the assembly process is greatly improved, and good economic benefits are realized.
The invention relates to a novel round soft-package polymer lithium ion battery with high yield, reliable structure and lower cost and an assembly method (namely a pack structure and an assembly process).
Drawings
Fig. 1 is a schematic view of an exploded structure of a circular soft-package polymer lithium ion battery provided by the present invention;
fig. 2A is a first schematic diagram of an encapsulation structure of an assembly structure of a circular soft-package polymer battery cell in the circular soft-package polymer lithium ion battery provided by the present invention;
fig. 2B is a schematic diagram of a packaging structure of a circular soft-package polymer battery cell in the circular soft-package polymer lithium ion battery provided in the present invention;
fig. 3 is a schematic structural diagram of a positive electrode lead assembly in a circular soft-package polymer lithium ion battery provided by the present invention;
fig. 4 is a schematic structural diagram of a negative electrode lead assembly in a circular soft-package polymer lithium ion battery provided by the present invention;
fig. 5A is a schematic structural diagram of an injection molding bracket in the circular soft-package polymer lithium ion battery provided by the invention;
fig. 5B is a schematic structural diagram of an injection molding bracket in the circular soft-package polymer lithium ion battery provided by the invention;
fig. 6A is a schematic view showing a first packaging structure of a battery fixing clamp adopted in the assembly of the circular soft-package polymer lithium ion battery provided by the invention;
fig. 6B is a schematic diagram of a packaging structure of a battery fixing clamp used in the assembly of the circular soft-package polymer lithium ion battery provided by the present invention;
fig. 7 is a schematic diagram of a circular flexible polymer cell placed in a battery holding fixture;
fig. 8 is a schematic view of a packaging structure of a finished battery of a circular soft-package polymer lithium ion battery provided by the invention;
in the figure: 10. a round soft-packed polymer cell; 1001. a positive tab; 1002. a negative tab; 1003. sealing edges; 1004. a body; 1005. the leading edge of the positive electrode; 1006. the leading edge of the negative electrode; 1007. gluing a positive electrode tab; 1008. gluing a negative pole tab; 1009. a cell two-dimensional verification code (QR code);
20. a positive lead assembly; 2001. a positive electrode lead; 1002. a positive electrode nickel plate;
30. a negative lead assembly; 3001. a negative color wire; 3002. a negative electrode nickel plate; 3003. bending the groove;
40. injection molding a bracket; 4001. a positive electrode side wall; 4002. a cathode side wall; 4003. a positive electrode card slot; 4004. a negative electrode clamping groove; 4005. a front edge clamping groove;
50. a side protective tape; 60. a bracket protective tape; 70. a front edge protective tape; 80. a label;
8001. a tag two-dimensional verification code (QR code);
90. a positive electrode protective tape; 100. a negative electrode protective tape; 110. and (5) fixing the clamp for the battery.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 1 to 8, the present invention provides a circular soft-packaged polymer lithium ion battery, which includes a circular soft-packaged polymer battery cell 10, a positive electrode lead assembly 20, a negative electrode lead assembly 30, an injection molding bracket 40, a side protective tape 50, a bracket protective tape 60, a front edge protective tape 70, a label 80, a positive electrode protective tape 90, and a negative electrode protective tape 100, thereby forming a finished Product Assembly (PACK) battery, wherein:
the round soft-packaged polymer battery cell 10 comprises a positive electrode tab 1001, a negative electrode tab 1002, a sealing edge 1003, a body 1004, a positive electrode front edge 1005, a negative electrode front edge 1006, positive electrode tab glue 1007, negative electrode tab glue 1008 and a battery cell two-dimensional verification code (QR code) 1009 sprayed with detailed information of the battery cell;
the upper end and the lower end of the body 1004 are respectively provided with an anode leading edge 1005 and a cathode leading edge 1006;
a positive tab 1001 and a negative tab 1002 connected to the center of the upper and lower ends of the body 1004, respectively;
the top surface and the bottom surface of the body 1004 are respectively provided with a positive pole tab glue 1007 and a negative pole tab glue 1008;
the side surface of the body 1004 is provided with a sealing edge 1003 and a battery cell two-dimensional verification code (QR code) 1009 which are vertically distributed;
the edge seal 1003 in the round soft-packaged polymer battery cell 10 is wrapped with a side protective adhesive tape 50;
the negative tab 1002 in the circular soft-packed polymer cell 10 is welded (by a spot welder) to the negative lead assembly 30;
wherein, the positive tab 1001 in the circular soft-packaged polymer battery cell 10 is welded with the positive lead assembly 20 (by a spot welding machine);
wherein, the positive wire assembly 20 is adhered to the support protective tape 60 and clamped at one end of the injection molding support 40;
and the negative electrode lead assembly 30 is clamped at the other end of the injection molding bracket 40.
A two-dimensional cell verification code (QR code) 1009 for recording detailed cell information is sprayed on the body 1004 of the circular soft-packaged polymer cell 10, and includes information such as production date, capacity, batch, voltage platform, and the like.
In the present invention, in a specific implementation, the outer wall of the body 1004 is wrapped with the label 80.
The label 80 is printed with detailed information such as the manufacturer, customer, volume, and authentication logo of the product, and is laser-etched with a label QR code 8001 recording detailed information of the pack, including information such as the date of manufacture, customer code, and manufacturer code.
In the present invention, in a specific implementation, the leading edge protective tape 70 is bonded to the negative leading edge 1006 of the circular soft-packaged polymer battery cell 10;
the positive electrode protective tape 90 is wrapped on the positive electrode front edge 1005 of the round soft-packaged polymer battery cell 10;
a stent protective tape 60 is stuck on the injection molded stent 40.
In the present invention, a circle of the negative electrode protection tape 100 is wound around the injection molding bracket 40.
It should be noted that, as shown in fig. 2A and fig. 2B, in the assembly process of the circular soft-packaged polymer battery cell 10, the battery cell soft-package shell must not leak metal edges, otherwise a short circuit may be caused, in the bending process, the tab glue must be soft glue and must be folded along the tab glue root, otherwise the size may exceed the upper limit.
In the present invention, in a specific implementation, as shown in fig. 3, the positive electrode lead assembly 20 includes a positive electrode lead 2001 (which may be a red lead, for example) and a positive electrode nickel sheet 2002, wherein:
a positive electrode lead 2001 welded to one end of the positive electrode nickel plate 2002;
the positive electrode lead 2001 is bonded to the holder protective tape 60.
It should be noted that, for the positive electrode lead assembly 20, during the assembling process, the positive electrode lead 2001 must be adhered to the support protective tape 60 and must be clamped in the positive electrode clamping slot 4003 of the injection molded support 40, so that the positive electrode lead 2001 is positioned and the subsequent positive electrode protective tape 90 is easily adhered.
In a specific implementation of the present invention, as shown in fig. 4, the negative electrode lead assembly 30 includes a negative electrode lead 3001 (which may be a black lead, for example) and a negative electrode nickel plate 3002, wherein:
a negative electrode lead 3001 welded to one end of the negative electrode nickel plate 3002;
the negative electrode nickel plate 3002 is provided with a bent groove 3003.
It should be noted that, for the negative electrode lead assembly 30, in the assembly process, the negative electrode nickel tab 3002 must be folded in half along the bending groove 3003, otherwise, the negative electrode lead 3001 cannot be easily clamped in the negative electrode clamping groove 4004 of the injection molding bracket 40, and in the subsequent bending process of the negative electrode lead assembly 30, 180 ° folding must be performed along the negative electrode tab glue root portion 1008 first, and then 180 ° folding must be performed at the bottom of the negative electrode front edge 1006.
In the present invention, in a specific implementation, as shown in fig. 5, the injection molding bracket 40 includes a positive electrode sidewall 4001, a negative electrode sidewall 4002, a positive electrode clamping groove 4003, a negative electrode clamping groove 4004, and a leading edge clamping groove 4005, wherein:
the front edge clamping groove 4005 is positioned at the front end of the injection molding bracket 40 body;
the left side and the right side of the front edge clamping groove 4005 are respectively provided with a concave negative side wall 4002 and a concave positive side wall 4001;
the left side and the right side of the front part of the injection molding bracket 40 body are respectively provided with a negative clamping groove 4004 and a positive clamping groove 4003;
the positive clamping groove 4003 is used for clamping and connecting a positive lead 2001 in the positive lead assembly 20;
and the negative electrode clamping groove 4004 is used for clamping the black lead 3001 in the negative electrode lead assembly 30.
It should be noted that, for the injection-molded bracket 40, during the assembly process, the positive lead 2001 in the positive lead assembly 20 must be clamped in the positive clamping groove 4003, and the black lead 3001 in the negative lead assembly 30 must be clamped in the negative clamping groove 4004, otherwise, the injection-molded bracket 40 is reversely mounted.
In the present invention, in terms of specific implementation, as shown in fig. 6A, 6B and 7, for the circular soft-package polymer lithium ion battery provided by the present invention, a matched battery fixing clamp 110 is further included;
the battery fixing clamp 110 is used for fixedly placing the round soft-packaged polymer battery cell 10.
In the specific implementation, the battery fixing clamp 110 includes a battery fixing bin 11001, a suction cup 11002, a battery push block 11003 and a push block rotating shaft 11004, wherein:
the concave battery fixing bin 11001 is positioned at the top of the battery fixing clamp 110, and the shape and the size of the concave battery fixing bin are correspondingly matched with those of a round soft-packaged polymer battery cell 10 to be placed;
the left and right ends of the battery fixing bin 11001 are opened, and a battery push block 11003 is installed at the rear side of the battery fixing bin 11001.
In particular, the front side and the right side of the battery fixing clamp 110 are respectively provided with two suckers 11002.
In particular, the battery fixing clamp 110 body is provided with a transverse push block rotating shaft 11004;
the push block rotating shaft 11004 transversely penetrates through the battery push block 11003;
the battery push block 11003 is hinged to the body of the battery fixing clamp 110 through a push block rotating shaft 11004.
It should be noted that, for the battery fixing clamp 110, in the assembling process, the circular soft-packaged polymer battery cell 10 needs to be placed in the battery fixing clamp 110 according to the correct direction and angle position and circulated together, and then in the whole assembling process, it is only required to ensure that the suction cup 11002 in the battery fixing clamp 110 is matched with the corresponding process tool clamp to complete the operation of the process.
In the present invention, as shown in fig. 8, the structure of the finished battery of the round soft-package polymer lithium ion battery provided by the present invention is schematically illustrated, and in order to prevent the positive electrode lead 2001 and the negative electrode lead 3001 from short circuit, a sleeve should be sleeved or other short circuit prevention measures should be taken during packaging.
The specific sticking modes of the side protective tape 50, the support protective tape 60, the leading edge protective tape 70, the label 80, the positive protective tape 90 and the negative protective tape 100 are not described in detail. On the finished battery, there is a label two-dimensional verification code 8001(QR code).
In summary, the injection molding support is introduced into the structure of the round soft-package polymer lithium ion battery, so that the contact short circuit of the battery is avoided, the structural strength of the whole round soft-package polymer lithium ion battery is improved, and meanwhile, the round soft-package polymer lithium ion battery can successfully pass tests such as falling and roller tests, so that the structural reliability of the round soft-package polymer lithium ion battery is strongly guaranteed, the market application prospect of products of battery manufacturers is favorably improved, and the round soft-package polymer lithium ion battery has great production practice significance;
in addition, in the invention, when the novel round soft-package polymer lithium ion battery is assembled, the battery fixing clamp is introduced, so that the large-area direct contact between the hands of an operator and the battery is avoided, the risks of scratches, pits, liquid leakage and the like on the surface of a finished battery are reduced, the yield of the round soft-package polymer lithium ion battery in the pack assembly process is greatly improved, and good economic benefits are realized.
The circular soft-package polymer lithium ion battery provided by the invention has the advantages of small self-discharge, long cycle life, no memory effect, good safety performance, light weight, large capacity, small internal resistance, lower cost for assembling PACK and the like.
In the invention, the leading-out directions of the battery anode B + and the battery cathode B-are required to be the same direction, but because the anode lug and the cathode lug of the round soft-package polymer lithium ion battery are in opposite directions, and because the battery core is too small and the front edge of the battery core is too thin, an injection molding bracket is introduced in the assembly process, the contact short circuit of the battery anode B + and the battery cathode B-lead is successfully avoided, the strength of the whole round soft-package polymer lithium ion battery is also increased, meanwhile, the lithium ion battery can successfully pass safety tests such as falling, rolling cylinders and the like, and the reliability of the assembly pack structure of the round soft-package polymer lithium ion battery is increased.
For the invention, in order to assemble the round soft-package polymer lithium ion battery, the invention also provides an assembly method of the round soft-package polymer lithium ion battery, which specifically comprises the following steps:
firstly, a circular soft-packaged polymer battery cell 10 is placed in a battery fixing clamp 110, and then, when each process is carried out, the placing state of the circular soft-packaged polymer battery cell in the battery fixing clamp is kept unchanged, and the circular soft-packaged polymer battery cell is only combined with a tool clamp of the corresponding process, so that the battery is prevented from being in contact with a large area by hand for multiple times;
then, wrapping a side protective adhesive tape 50 on the edge seal 1003 of the round soft-packaged polymer battery cell 10 to prevent the edge seal metal of the battery cell from leaking out to cause short circuit;
then, welding the negative electrode tab 1002 of the circular soft-packaged polymer battery cell 10 and the negative electrode lead assembly 30 by a spot welding machine;
then, the negative electrode lead assembly 30 is folded in half at 180 degrees along the bending groove 3002, and then folded at 180 degrees along the root of the negative electrode tab film 1008,
then, 180-degree double folding is carried out at the bottom of the leading edge 1006 of the negative electrode;
next, the support protective tape 60 is adhered to the positive electrode sidewall 4001 (specifically, the positive electrode sidewall marked with a "+" sign) on the injection-molded support 40, and is used for subsequently adhering the positive electrode lead of the positive electrode lead assembly;
then, the leading edge protective tape 70 is stuck on the negative leading edge 1006 of the round soft-packaged polymer battery cell 10;
then, buckling the leading edge clamping groove 4005 of the injection molding bracket 40, which is adhered with the bracket protective adhesive tape 60, on the leading edge protective adhesive tape 70 of the battery, and clamping the negative lead 3001 in the negative lead assembly 30 in the negative clamping groove 4004 of the injection molding bracket 40;
then, welding the positive tab 1001 of the circular soft-packaged polymer battery cell 10 and the positive lead assembly 20 through laser welding equipment, and bending the positive tab through 180 degrees along the root of the positive tab glue 1007, so that the positive lead 2001 of the positive lead assembly 20 is adhered to the support protective adhesive tape 60, and the positive lead 2001 is clamped in the positive clamping groove 4003 of the injection-molded support 40;
then, wrapping the label 80 on the body 1004 of the round soft-packed polymer battery cell 10;
then, wrapping the positive electrode protective tape 90 on the positive electrode front edge 1005 of the round soft-packaged polymer battery cell 10;
then, the negative electrode protection tape 100 is wound around the injection molding bracket 30 for a circle, thereby finally obtaining a finished battery of the circular polymer lithium ion battery.
It should be noted that, in the specific implementation, in the whole assembly process, the circular soft-package polymer battery cell 10 must be placed in the battery fixing bin 11001 in the subsequent battery fixing clamp 110, and this state is always used as a circulation, and then when other assembly processes are performed, the battery fixing clamp 110 in which the circular soft-package polymer battery cell 10 is placed is operated by the suction cup (11002 is matched with other tool clamps to complete the process).
In a specific implementation, a cell two-dimensional verification code (QR code) 1009 on the body 1004 of the circular soft-package polymer cell 10 needs to be bound to a label QR code 8001 on the label 80, so as to trace information of the battery.
In the concrete implementation, the finished product battery is screened out to be a good product battery through the electric inspection equipment and the finished product caliper gauge, wherein the battery with qualified electrical property and size is screened out.
Compared with the prior art, the round soft-package polymer lithium ion battery and the assembly method provided by the invention have the following beneficial effects:
1. according to the invention, the injection molding support (40) is introduced into the assembling pack structure of the circular soft-package polymer lithium ion battery, so that the contact short circuit of the battery anode B + and the battery cathode B-is avoided, the strength of the pack structure of the whole circular soft-package polymer lithium ion battery is increased, meanwhile, the circular soft-package polymer lithium ion battery can successfully pass tests such as falling and roller tests, and the reliability of the pack structure of the circular soft-package polymer lithium ion battery is strongly ensured.
2. Meanwhile, when the round soft-package polymer lithium ion battery is assembled (pack), the battery fixing clamp (110) is introduced, so that the large-area direct contact between the hands of operators and the battery is avoided, the risks of scratches, pits, liquid leakage and the like on the surface of a finished battery are reduced, the yield of the round soft-package polymer lithium ion battery in the assembling (pack) process is greatly improved, and good economic benefits are realized.
In summary, compared with the prior art, the design of the injection molding bracket and the battery fixing clamp is introduced into the assembly structure (pack structure) and the assembly process (method) of the battery, so that the reliability of the assembly structure is ensured powerfully, the large-area direct contact between the hands of operators and the battery is avoided, the risks of scratches, pits, liquid leakage and the like generated on the surface of the finished battery are reduced, the yield of the round soft-package polymer lithium ion battery in the assembly process is greatly improved, and good economic benefits are realized.
The invention relates to a novel round soft-package polymer lithium ion battery with high yield, reliable structure and lower cost and an assembly method (namely a pack structure and an assembly process).
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. A round soft-package polymer lithium ion battery is characterized by comprising
Round soft packet of polymer electricity core (10), anodal wire assembly (20), negative pole wire assembly (30), support (40), side protection sticky tape (50) of moulding plastics, wherein:
the round soft-packaged polymer battery cell (10) comprises a positive electrode tab (1001), a negative electrode tab (1002), a sealing edge (1003), a body (1004), a positive electrode front edge (1005), a negative electrode front edge (1006), a positive electrode tab glue (1007), a negative electrode tab glue (1008) and a battery cell two-dimensional verification code (1009) sprayed with detailed information of the battery cell;
the upper end and the lower end of the body (1004) are respectively provided with a positive electrode front edge (1005) and a negative electrode front edge (1006);
the positive tab (1001) and the negative tab (1002) are respectively connected with the central positions of the upper end and the lower end of the body (1004);
the top surface and the bottom surface of the body (1004) are respectively provided with a positive pole tab glue (1007) and a negative pole tab glue (1008);
the side surface of the body (1004) is provided with a sealing edge (1003) and a battery cell two-dimensional verification code (1009) which are vertically distributed;
wherein a side edge protective adhesive tape (50) is wrapped on an edge sealing (1003) in the round soft-packaged polymer battery cell (10);
the negative electrode lug (1002) in the round soft-packaged polymer battery cell (10) is welded with the negative electrode lead assembly (30);
the positive tab (1001) in the round soft-packaged polymer battery cell (10) is welded with the positive lead assembly (20);
the positive lead assembly (20) is bonded with the support protective adhesive tape (60) and clamped at one end of the injection molding support (40);
and the negative electrode lead assembly (30) is clamped at the other end of the injection molding bracket (40).
2. The round soft-packing polymer lithium ion battery according to claim 1, wherein the outer wall of the body (1004) is wrapped with a label (80);
the leading edge protective adhesive tape (70) is bonded on the leading edge (1006) of the negative electrode in the round soft-packaged polymer battery cell (10);
the positive electrode protective adhesive tape (90) is wrapped on the front edge (1005) of the positive electrode in the round soft-packaged polymer battery cell (10);
a bracket protective adhesive tape (60) is stuck on the injection molding bracket (40).
3. The round soft-package polymer lithium ion battery according to claim 1, wherein a circle of negative electrode protection tape (100) is wound around the injection molding bracket (40).
4. The round soft-packed polymer lithium ion battery according to claim 1, wherein the positive lead assembly (20) comprises a positive lead (2001) and a positive nickel plate (2002), wherein:
a positive electrode lead (2001) welded to one end of the positive electrode nickel plate (2002);
and the positive electrode lead (2001) is bonded on the support protective adhesive tape (60).
5. The round soft-packed polymer lithium ion battery according to claim 4, wherein the negative lead assembly (30) comprises a negative lead (3001) and a negative nickel plate (3002), wherein:
a negative electrode lead (3001) welded to one end of the negative electrode nickel plate (3002);
the negative electrode nickel sheet (3002) is provided with a bending groove (3003).
6. The round soft-packed polymer lithium ion battery according to claim 5, wherein the injection-molded support (40) comprises a positive side wall (4001), a negative side wall (4002), a positive clamping groove (4003), a negative clamping groove (4004), and a leading edge clamping groove (4005), wherein:
the front edge clamping groove (4005) is positioned at the front end of the injection molding bracket (40) body;
the left side and the right side of the front edge clamping groove (4005) are respectively provided with an inwards concave negative side wall (4002) and a positive side wall (4001);
the left side and the right side of the front part of the injection molding bracket (40) body are respectively provided with a negative clamping groove (4004) and a positive clamping groove (4003);
the positive clamping groove (4003) is used for clamping a positive lead (2001) in the positive lead assembly (20);
and the negative pole clamping groove (4004) is used for clamping the black lead (3001) in the negative pole lead assembly (30).
7. The round soft-packed polymer lithium ion battery according to claim 1, further comprising a battery fixing jig (110);
the battery fixing clamp (110) is used for fixedly placing the round soft-packaged polymer battery cell (10);
battery mounting fixture (110) includes battery fixing bin (11001), sucking disc (11002), battery ejector pad (11003) and ejector pad pivot (11004), wherein:
the concave battery fixing bin (11001) is positioned at the top of the battery fixing clamp (110), and the shape and the size of the concave battery fixing bin are correspondingly matched with those of a round soft-packaged polymer battery cell (10) to be placed;
the left end and the right end of the battery fixing bin (11001) are opened, and a battery push block (11003) is installed on the rear side of the battery fixing bin (11001).
8. The circular soft-package polymer lithium ion battery according to claim 7, wherein the front side and the right side of the battery fixing clamp (110) body are respectively provided with two suckers (11002);
the battery fixing clamp (110) body is provided with a push block rotating shaft (11004) which is transversely distributed;
the push block rotating shaft (11004) transversely penetrates through the battery push block (11003);
the battery push block (11003) is hinged with the body of the battery fixing clamp (110) through a push block rotating shaft (11004).
9. The method for assembling the circular soft-packing polymer lithium ion battery according to any one of claims 5 to 8, which is characterized by comprising the following steps of:
firstly, a circular soft-packaged polymer battery cell (10) is placed in a battery fixing clamp (110), and then the placing state of the circular soft-packaged polymer battery cell in the battery fixing clamp is kept unchanged when each process is carried out;
then, wrapping a side protective adhesive tape (50) on the edge sealing (1003) of the round soft-packaged polymer battery cell (10) to prevent the edge sealing metal of the battery cell from leaking outwards to cause short circuit;
then, welding a negative electrode lug (1002) of the round soft-packaged polymer battery cell (10) and a negative electrode lead assembly (30) through a spot welding machine;
then, the negative pole lead assembly (30) is folded in half at an angle of 180 degrees along a bending groove (3002), and then is folded in half at an angle of 180 degrees along the root part of the negative pole tab glue (1008),
then, 180-degree double folding is carried out at the bottom of the leading edge (1006) of the negative electrode;
then, a bracket protective adhesive tape (60) is adhered to the positive electrode side wall (4001) on the injection molding bracket (40) and is used for subsequently adhering a positive electrode lead (2001) of the positive electrode lead assembly (20);
then, adhering a leading edge protective adhesive tape (70) on the leading edge (1006) of the negative electrode of the round soft-package polymer battery cell (10);
then, buckling a front edge clamping groove (4005) of the injection molding bracket (40) adhered with the bracket protective adhesive tape (60) on a front edge protective adhesive tape (70) of the battery, and clamping a negative lead (3001) in the negative lead assembly (30) in a negative clamping groove (4004) of the injection molding bracket (40);
then, welding a positive tab (1001) of the round soft-package polymer battery cell (10) and a positive lead assembly (20) through laser welding equipment, and bending the positive tab at 180 degrees along the root of a positive tab glue (1007) so that a positive lead (2001) of the positive lead assembly (20) is stuck on a support protective adhesive tape (60), and the positive lead (2001) is clamped in a positive clamping groove (4003) of an injection molding support (40);
then, wrapping the label (80) on the body (1004) of the round soft-packaged polymer battery cell (10);
then wrapping the positive electrode protective adhesive tape (90) on the front edge (1005) of the positive electrode of the round soft-packaged polymer battery cell (10);
and then, winding the negative electrode protection adhesive tape (100) on an injection molding bracket (30) for a circle, and finally obtaining a finished product battery of the round polymer lithium ion battery.
CN202010199574.1A 2020-03-20 2020-03-20 Circular soft-packaged polymer lithium ion battery and assembly method Active CN111525057B (en)

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