CN113103367B - Battery cell slitting device and battery cell slitting method thereof - Google Patents

Battery cell slitting device and battery cell slitting method thereof Download PDF

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Publication number
CN113103367B
CN113103367B CN202110361389.2A CN202110361389A CN113103367B CN 113103367 B CN113103367 B CN 113103367B CN 202110361389 A CN202110361389 A CN 202110361389A CN 113103367 B CN113103367 B CN 113103367B
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China
Prior art keywords
glue
pole piece
diaphragm
piece group
cutting
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CN202110361389.2A
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CN113103367A (en
Inventor
张碧娟
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Dongguan Jiaxing Automation Equipment Technology Co ltd
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Dongguan Jiaxing Automation Equipment Technology Co ltd
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Publication of CN113103367A publication Critical patent/CN113103367A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/06—Severing by using heat
    • B26F3/08—Severing by using heat with heated members
    • B26F3/10—Severing by using heat with heated members with heated rollers or discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with cutting
    • B26D7/34—Means for performing other operations combined with cutting for applying a coating, such as butter, to cut product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/045—Cells or batteries with folded plate-like electrodes
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0459—Cells or batteries with folded separator between plate-like electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B2037/1253—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives curable adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0076—Curing, vulcanising, cross-linking
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 belongs to the technical field of battery production, and particularly relates to a battery core slitting device and a battery core slitting method thereof, wherein the battery core slitting device comprises a machine base and a forming mechanism, and the machine base is provided with an installation station for installing a battery core folding monomer to be slit; the forming mechanism comprises a portal frame, a linear driving assembly and a cutting and sealing assembly, the number of the cutting and sealing assemblies is at least two, all the cutting and sealing assemblies are respectively aligned at intervals one by one, the cutting and sealing assembly comprises a mounting frame, a cutting part, a gluing part and a glue fixing part, the end part of the mounting frame is fixedly connected with the output end of the linear driving assembly, and the cutting part, the gluing part and the glue fixing part are sequentially arranged on the linear driving assembly. By adopting the cutting method of cutting, gluing and glue fixing one-step forming, the diaphragm can be fixed by a glue layer in a short time after being cut, the structural stability of the battery cell after being cut is greatly improved, the production and preparation efficiency of the battery cell is effectively improved, and the development of enterprises is facilitated.

Description

Battery cell slitting device and battery cell slitting method thereof
Technical Field
The invention belongs to the technical field of battery production, and particularly relates to a battery core slitting device and a battery core slitting method thereof.
Background
The power battery is a power source for providing power source for the tool, and is a storage battery for providing power for electric automobiles, electric trains, electric bicycles and golf carts. It is mainly distinguished from a starting battery for starting an automobile engine. Valve-port sealed lead-acid batteries, open tubular lead-acid batteries and lithium iron phosphate batteries are mostly used.
The power battery adopts a mode of stacking multiple sheets at a time for increasing the rate of the stacked sheets to stack the sheets, the efficiency can reach 400 sheets per minute, and after the stacking is finished, multiple sheet pole groups are arranged side by side. And cutting out each battery cell after lamination is completed. The diaphragm is cut off by a hot melting method in the prior art, and the upper diaphragm and the lower diaphragm are automatically adhered together after hot melting so as to fix the pole piece group in the middle of the diaphragm.
Disclosure of Invention
The invention aims to provide a battery core slitting device and a battery core slitting method thereof, and aims to solve the technical problems that after a battery core is slit and fused by the battery core slitting device in the prior art, the upper and lower layers of diaphragms of the battery core are adhered together, so that the edge adhesion degree of the battery core is low, a pole piece group is easily exposed, the battery quality is influenced, and the enterprise development is not facilitated.
In order to achieve the above object, an electric core monomer of a power battery provided in an embodiment of the present invention includes a first pole piece group, a second pole piece group, a diaphragm, and a fixing adhesive layer, where the first pole piece group, the diaphragm, and the second pole piece group are sequentially stacked to form a sheet-shaped integral structure, the fixing adhesive layer is formed at the edge positions of the first pole piece group, the diaphragm, and the second pole piece group, the end surface of the fixing adhesive layer is sequentially bonded to the edges of the first pole piece group, the diaphragm, and the second pole piece group to enable the first pole piece group, the diaphragm, and the second pole piece group to be stably stacked and formed, the polarities of the first pole piece group and the second pole piece group are opposite to each other, and the diaphragm is coated with a ceramic interlayer for stabilizing an electric core structure.
Optionally, the number of the first pole piece groups and the second pole piece groups is multiple, and a group of the diaphragms is arranged between an adjacent group of the first pole piece groups and an adjacent group of the second pole piece groups; the diaphragm quantity is one, the diaphragm each other has first terminal surface and second terminal surface for relative both ends face shaping respectively, the multiunit first pole piece group is followed the length direction of diaphragm is in proper order the coincide at interval on the first terminal surface, the multiunit second pole piece group is followed the length direction of diaphragm is in proper order the coincide at interval on the second terminal surface, all second pole piece group respectively one-to-one with first pole piece group is to setting up in alignment, and is adjacent first pole piece group with be provided with the interval between the second pole piece group, the diaphragm can drive all through all intervals first pole piece group with second pole piece group is folding forming in proper order, the fixed glue film shaping is in the border position after the external device of cutting of folder, the tip of fixed glue film extends to in the interval.
Optionally, the diaphragms are folded along the intervals in a Z-shaped structure, so that an installation cavity for accommodating one group of the first pole piece groups or one group of the second pole piece groups is formed between two adjacent layers of the diaphragms; when the number of the first electrode plates is more than or equal to two groups, the interval is formed between every two adjacent groups of the first electrode plates; the second electrode plate group comprises at least one group of second electrode plates, and when the number of the second electrode plates is more than or equal to two groups, the interval is formed between every two adjacent groups of the second electrode plates; the polarities of the first electrode plate and the second electrode plate are opposite to each other.
One or more technical solutions in the power battery cell monomer provided by the embodiment of the present invention at least have one of the following technical effects: the structure principle of the power battery cell monomer is as follows: compared with the technical problems that most of power battery cells in the prior art are formed by directly cutting the diaphragms through a thermal cutting device, the diaphragms coated with the ceramic layers cannot be smoothly bonded at the edges after thermal melting to form a coating structure, so that the structure of a cell monomer is unstable, and the product quality is influenced.
In order to achieve the above object, an embodiment of the present invention provides a battery core slitting device, which is used for manufacturing the power battery core monomer, and includes a machine base and a forming mechanism, where the machine base is provided with an installation station for installing a battery core folding monomer to be slit; the forming mechanism comprises a portal frame, a linear driving assembly and a cutting and sealing assembly, the portal frame is fixedly arranged on the base, a beam of the portal frame is positioned above the installation station, the linear driving assembly is arranged on the portal frame, the cutting and sealing assembly is arranged at the output end of the linear driving assembly, and the linear driving assembly is used for driving the cutting and sealing assembly to move towards the installation station, so that the output end of the cutting and sealing assembly can contact a to-be-cut cell folding monomer positioned on the installation station; wherein, the quantity that cuts off the involution subassembly is two sets of at least, all cut off the involution subassembly and align one by one respectively the interval, cut off the involution subassembly and include the mounting bracket, cut off part, rubber coating part and admittedly glue the part, the tip of mounting bracket with sharp drive assembly's output fixed connection, cut off the part the rubber coating part with admittedly glue the part certainly the frame extremely the direction of mounting bracket sets gradually the mounting bracket is kept away from sharp drive assembly's tip, the output that cuts off the part is used for cutting off and is located the interval position the diaphragm, the rubber coating part is used for coating the glue solution in the incision position, admittedly glue the part and be used for promoting the glue solution solidification shaping to do fixed glue film.
Optionally, the cutting-off component comprises a first connecting shaft and a heating roller, the first connecting shaft is arranged at the end of the mounting frame, the heating roller is arranged on the first connecting shaft, an electric heating pipe used for heating the outer wall of the heating roller is arranged in the heating roller, the outer wall of the heating roller can be heated and fused to the diaphragm, and the first connecting shaft and the heating roller are arranged along the length direction of the interval.
Optionally, the rubber coating part includes second connecting axle, glue solution shower nozzle and glue spreader, the second connecting axle rotates to be connected the tip of mounting bracket, the glue spreader is fixed to be set up on the second connecting axle, the glue solution shower nozzle sets up just be located on the mounting bracket one side of glue spreader, the output of glue solution shower nozzle is aimed at the glue spreader just is used for spraying the glue solution extremely on the glue spreader, glue solution shower nozzle and outside confession mucilage binding are put the pipe connection.
Optionally, the glue fixing component comprises a heating frame and a heat radiation unit, the heating frame is fixedly arranged at the end part of the mounting frame, an opening cavity is formed in the heating frame, and the heat radiation unit is fixedly arranged in the heating frame, is used for outputting heat and transmits the heat to the glue solution through an opening of the opening cavity.
Optionally, the heat radiation units are heating wires, the number of the heat radiation units is multiple, and the multiple groups of the heat radiation units are arranged at intervals along the length direction of the opening cavity; the height of the opening cavity is larger than the overlapping thickness of the first pole piece group, the second pole piece group and the diaphragm, so that the heat radiation unit heats glue liquid attached to the edges of the first pole piece group, the second pole piece group and the diaphragm at least at one group at the same time.
Optionally, be provided with on the frame and be used for keeping away the sky cut off the part with the groove of stepping down of rubber coating part, the groove of stepping down the shaping in on the installation station, the quantity of the groove of stepping down is at least two sets of, all the groove of stepping down aligns one by one respectively the interval sets up.
One or more technical solutions in the battery core slitting device provided by the embodiment of the present invention at least have one of the following technical effects: the working principle of the battery core slitting device is as follows: installing the battery cell monomer to be cut on the base and positioning the battery cell monomer in the installation station; the linear driving assembly drives the cutting and sealing assembly to move towards the mounting station; the cutting part arranged on the mounting rack is driven by the linear driving assembly, and the output end of the cutting part acts on the interval position to cut the diaphragm into a plurality of sections; the gluing component arranged on the mounting frame is driven by the linear driving assembly to output glue solution to the notch position of the diaphragm, so that the glue solution covers the first pole piece group, the second pole piece group and the edge of the diaphragm; the glue fixing component arranged on the mounting rack is driven by the linear driving component, the output end of the glue fixing component is aligned with glue solutions covering the edges of the first pole piece group, the second pole piece group and the diaphragm, and the glue solutions are solidified and formed into the adhesive glue, so that compared with the technical problem that the battery cell slitting equipment in the prior art directly adopts a hot melting cutting mode to realize the fusion forming of the diaphragm notch, the forming effect is poor due to the limitation of a ceramic layer, the product quality and the battery cell slitting efficiency are influenced, and the enterprise development is not facilitated, the cutting and sealing component adopted by the embodiment of the invention realizes the one-step forming of cutting, gluing and glue fixing:
for the power battery cell structure: compared with the technical problems that most of power battery cells in the prior art are formed by directly cutting the diaphragm through a thermal fusing device, the diaphragm coated with the ceramic layer cannot be smoothly bonded at the rear edge of the thermal fusing to form a coating structure, so that the structure of a cell monomer is unstable, and the product quality is affected, the power battery cell monomer provided by the embodiment of the invention adopts the fixed adhesive layer to stably and integrally stack the first pole piece, the second pole piece and the diaphragm, and the added adhesive layer completely bonds all material layers, so that the stability of the overall structure of the cell is effectively ensured, the pole pieces are prevented from being leaked or scattered, and the product quality is improved, and the development of enterprises is facilitated.
And (3) manufacturing a power battery core: by adopting the cutting method of cutting, gluing and glue fixing one-step forming, the diaphragm can be fixed by a glue layer in a short time after being cut, the structural stability of the battery cell after being cut is greatly improved, the production and preparation efficiency of the battery cell is effectively improved, and the development of enterprises is facilitated.
In order to achieve the above object, an embodiment of the present invention provides a method for slitting a battery cell, which is performed by the above battery cell slitting device, and includes the following steps:
s100: installing the battery cell monomer to be cut on the base and positioning the battery cell monomer in the installation station;
s200: the linear driving assembly drives the cutting and sealing assembly to move towards the mounting station;
s300: the cutting part arranged on the mounting rack is driven by the linear driving assembly, and the output end of the cutting part acts on the interval position to cut the diaphragm into a plurality of sections;
s400: the glue coating component arranged on the mounting frame is driven by the linear driving assembly, and glue liquid is output to the position of the notch of the diaphragm, so that the glue liquid covers the first pole piece group, the second pole piece group and the edge of the diaphragm;
s500: the glue fixing component arranged on the mounting frame is driven by the linear driving assembly, and the output end of the glue fixing component is aligned with glue solutions covering the edges of the first pole piece group, the second pole piece group and the diaphragm, so that the glue solutions are solidified and formed into the adhesive glue.
One or more technical solutions in the cell slitting method provided by the embodiment of the present invention have at least one of the following technical effects: compared with the technical problem that the battery core slitting equipment in the prior art directly adopts a hot melting cutting-off mode to realize the fusion forming of the diaphragm cuts, the restriction of a ceramic layer causes poor forming effect, the technical problem that the product quality and the battery core slitting efficiency are not beneficial to enterprise development is influenced, the cutting-off method of one-step forming of gluing and solid glue is adopted, the diaphragm is fixed by obtaining a glue layer in a short time after being cut off, the structural stability of the battery core after being slit is greatly improved, the battery core production and preparation efficiency is effectively improved, and the enterprise development is facilitated.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a power battery cell unit provided in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a battery cell slitting device according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a battery cell slitting device according to an embodiment of the present invention during operation.
Fig. 4 is a flowchart of a cell slitting method provided by the present invention.
Wherein, in the figures, the respective reference numerals:
10-first pole piece group 20-second pole piece group 30-diaphragm
40-fixed glue layer 50-engine base 60-portal frame
71-mounting bracket 72-cutting part 73-gluing part
74-glue fixing part 51-abdicating groove.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-4 are exemplary and intended to be used to illustrate embodiments of the invention, and should not be construed as limiting the invention.
In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In an embodiment of the present invention, as shown in fig. 1 to 4, a power battery cell monomer is provided, including a first plate group 10, a second plate group 20, a diaphragm 30, and a fixing adhesive layer 40, where the first plate group 10, the diaphragm 30, and the second plate group 20 are sequentially stacked to form a sheet-shaped integral structure, the fixing adhesive layer 40 is formed at the edge positions of the first plate group 10, the diaphragm 30, and the second plate group 20, the end surface of the fixing adhesive layer 40 is sequentially bonded to the edges of the first plate group 10, the diaphragm 30, and the second plate group 20, so that the first plate group 10, the diaphragm 30, and the second plate group 20 are stably stacked, the polarities of the first plate group 10 and the second plate group 20 are opposite, the diaphragm 30 is coated with a ceramic interlayer for stabilizing a cell structure, the ceramic interlayer is a ceramic diaphragm 30, the ceramic diaphragm 30 is a structure formed by a technology and mature in technology, and the main component of the ceramic diaphragm is aluminum oxide, which is not described in detail in this embodiment.
Specifically, this free structure principle of power battery electricity core: the first pole piece group 10, the diaphragm 30 and the second pole piece group 20 are sequentially laminated and molded through the fixing adhesive layer 40, and compared with the technical problems that most of power battery cells in the prior art are formed by directly cutting the diaphragm 30 through a thermal fusing device, the diaphragm 30 coated with a ceramic layer cannot be smoothly bonded at the rear edge of thermal fusing to form a coating structure, so that the structure of a cell monomer is unstable, and the product quality is affected, the power battery cell monomer provided by the embodiment of the invention adopts the fixing adhesive layer 40 to stably laminate the first pole piece, the second pole piece and the diaphragm 30 into a whole, all material layers are completely bonded through the added adhesive layer, the stability of the whole structure of the cell is effectively ensured, the pole pieces are prevented from leaking or falling apart, the product quality is improved, and the development of enterprises is facilitated.
As shown in fig. 1 to 4, in another embodiment of the present invention, the number of the first pole piece groups 10 and the second pole piece groups 20 is multiple, and a group of the diaphragms 30 is disposed between an adjacent group of the first pole piece groups 10 and an adjacent group of the second pole piece groups 20; wherein, the quantity of diaphragm 30 is one, diaphragm 30's the opposite both ends face each other is moulded respectively and has first terminal surface and second terminal surface, the multiunit first utmost point piece group 10 along diaphragm 30's length direction coincide in proper order at an interval on the first terminal surface, multiunit second utmost point piece group 20 along diaphragm 30's length direction coincide in proper order at an interval on the second terminal surface, all second utmost point piece group 20 respectively one-to-one with first utmost point piece group 10 aligns the setting, be adjacent first utmost point piece group 10 with be provided with the interval between the second utmost point piece group 20, diaphragm 30 can drive all through all intervals first utmost point piece group 10 with second utmost point piece group 20 is folding forming in proper order, fixed glue film 40 takes shape in the border position of the folded body after through outside cutting device cuts, the tip of fixed glue film 40 extends to in the interval, in this embodiment, the polarity of the first pole piece group 10 is positive, the polarity of the second pole piece group 20 is negative, and the pole piece arrangement mode that the single diaphragm 30 is matched with the interval is adopted, so that the stability of the diaphragm 30 during folding is improved, the diaphragm 30 is prevented from being difficult to fold due to interference of the edge of the pole piece, the pole piece is prevented from being damaged by bending due to folding of the diaphragm 30, and meanwhile, the interval structure is favorable for an external slitting device to effectively position and identify slitting points, and the production efficiency is improved.
As shown in fig. 1 to 4, in another embodiment of the present invention, the diaphragms 30 are folded along the gaps in a Z-shaped structure, so that an installation cavity for accommodating one group of the first pole piece groups 10 or one group of the second pole piece groups 20 is formed between two adjacent layers of the diaphragms 30; when the number of the first electrode plates is greater than or equal to two, the interval is formed between two adjacent groups of the first electrode plates; the second electrode sheet group 20 includes at least one group of the second electrode sheets, and when the number of the second electrode sheets is greater than or equal to two groups, the interval is formed between two adjacent groups of the second electrode sheets; first electrode slice with the polarity of second electrode slice is mutually opposite, in this embodiment, first electrode slice group 10 includes three first electrode slices of group, second electrode slice group 20 includes three second electrode slices of group, the electrode slice of both sides with be provided with the space between the inner wall of installation die cavity, adopt multiunit electrode slice structure as folded piece individual layer material, be favorable to providing a plurality of output setpoint of cutting the device when electric core is cut, realize the multiple spot and cut, improve the fashioned electric core monomer quantity of cutting in the unit interval, for example, in this embodiment, the quantity of individual layer electrode slice is three groups, and the device of cutting that corresponds to set up cuts the back, can obtain three independent electric core monomer, improves production efficiency effectively. Is beneficial to the development of enterprises.
As shown in fig. 1 to 4, another embodiment of the present invention provides a battery core slitting device, which is used for manufacturing the above power battery cell monomer, and includes a machine base 50 and a forming mechanism, where the machine base 50 is provided with an installation station for installing a battery core folding monomer to be slit; the molding mechanism comprises a portal frame 60, a linear driving assembly and a cutting and sealing assembly, the portal frame 60 is fixedly arranged on the base 50, a beam of the portal frame 60 is positioned above the installation station, the linear driving assembly is arranged on the portal frame 60, the cutting and sealing assembly is arranged at the output end of the linear driving assembly, and the linear driving assembly is used for driving the cutting and sealing assembly to move towards the installation station, so that the output end of the cutting and sealing assembly can contact a to-be-cut battery cell folding monomer positioned on the installation station; wherein, the quantity of cutting off the involution subassembly is two sets of at least, and all cut off the involution subassembly and align one by one respectively the interval, cut off the involution subassembly and include mounting bracket 71, cut off part 72, rubber coating part 73 and admittedly glue part 74, mounting bracket 71 the tip with linear drive subassembly's output fixed connection, cut off part 72 rubber coating part 73 with admittedly glue part 74 certainly frame 50 extremely the direction of mounting bracket 71 sets gradually the mounting bracket 71 is kept away from linear drive subassembly's tip, the output that cuts off part 72 is used for cutting off and is located the interval position diaphragm 30, rubber coating part 73 is used for coating the glue solution in the incision position, admittedly glue part 74 is used for promoting the glue solution to solidify the shaping and does fixed glue film 40.
Specifically, this device is cut to electricity core's theory of operation: mounting the battery cell monomer to be cut on the base 50 and positioning the battery cell monomer in the mounting station; the linear driving assembly drives the cutting and sealing assembly to move towards the mounting station; a cutting part 72 arranged on the mounting rack 71 is driven by the linear driving assembly, and the output end of the cutting part acts on the interval position to cut the diaphragm 30 into a plurality of sections; the gluing component 73 arranged on the mounting frame 71 is driven by the linear driving assembly to output glue solution to the cut position of the diaphragm 30, so that the glue solution covers the edges of the first pole piece group 10, the second pole piece group 20 and the diaphragm 30; the glue fixing component 74 arranged on the mounting frame 71 is driven by the linear driving component, and the output end of the glue fixing component aligns with glue solutions covering the edges of the first pole piece group 10, the second pole piece group 20 and the diaphragm 30, so that the glue solutions are solidified and formed into the adhesive glue, compared with the technical problem that the battery cell slitting equipment in the prior art directly adopts a hot melting cutting mode to realize the fusion forming of the notch of the diaphragm 30, the forming effect is poor due to the limitation of a ceramic layer, the product quality and the battery cell slitting efficiency are affected, and the enterprise development is not facilitated, the cutting and sealing component adopted by the embodiment of the invention realizes the one-step forming of cutting, gluing and glue fixing:
for the power battery cell structure: the first pole piece group 10, the diaphragm 30 and the second pole piece group 20 are sequentially laminated and molded through the fixing adhesive layer 40, and compared with the technical problems that most of power battery cells in the prior art are formed by directly cutting the diaphragm 30 through a thermal fusing device, the diaphragm 30 coated with a ceramic layer cannot be smoothly bonded at the rear edge of thermal fusing to form a coating structure, so that the structure of a cell monomer is unstable, and the product quality is affected, the power battery cell monomer provided by the embodiment of the invention adopts the fixing adhesive layer 40 to stably laminate the first pole piece, the second pole piece and the diaphragm 30 into a whole, all material layers are completely bonded through the added adhesive layer, the stability of the whole structure of the cell is effectively ensured, the pole pieces are prevented from leaking or falling apart, the product quality is improved, and the development of enterprises is facilitated.
And (3) manufacturing a power battery core: by adopting the cutting method of cutting, gluing and glue fixing one-step forming, the diaphragm 30 can be fixed by a glue layer in a short time after cutting, the structural stability of the battery cell after cutting is greatly improved, the production and preparation efficiency of the battery cell is effectively improved, and the development of enterprises is facilitated.
As shown in fig. 1 to 4, in another embodiment of the present invention, the linear driving assemblies are linear sliding tables arranged on the columns of the gantry 60, the number of the linear driving assemblies is two, two ends of the cross beam of the gantry 60 are respectively and fixedly connected to output ends of the two linear driving assemblies, and the mounting frame 71 is fixedly connected to the cross beam of the gantry 60.
As shown in fig. 1 to 4, in another embodiment of the present invention, the cutting component 72 includes a first connecting shaft and a heating roller, the first connecting shaft is disposed at an end of the mounting frame 71, the heating roller is disposed on the first connecting shaft, an electric heating tube for heating an outer wall of the heating roller is disposed in the heating roller, so that the outer wall of the heating roller can heat and fuse the diaphragm 30, the first connecting shaft and the heating roller are disposed along a length direction of the interval, in this embodiment, the first connecting shaft is disposed at an end limit position of the mounting frame 71, so as to ensure that the heating roller is stably contacted with the diaphragm 30, the heating roller is a technically formed and technically mature structure, and is often applied to a heating and fusing device, which is not described again in this embodiment.
As shown in fig. 1 to 4, in another embodiment of the present invention, the glue spreading component 73 includes a second connecting shaft, a glue solution nozzle and a glue spreading roller, the second connecting shaft is rotatably connected to an end of the mounting frame 71, the glue spreading roller is fixedly disposed on the second connecting shaft, the glue solution nozzle is disposed on the mounting frame 71 and located at one side of the glue spreading roller, an output end of the glue solution nozzle is aligned with the glue spreading roller and is used for spraying a glue solution onto the glue spreading roller, the glue solution nozzle is connected to an external glue supply device through a pipeline, and the glue solution is stably coated on the incision position through the glue spreading roller, which is beneficial to improving the coverage efficiency of the glue layer, so as to prevent the fixed glue layer 40 from scattering before solidification and affecting the glue layer formation.
As shown in fig. 1 to 4, in another embodiment of the present invention, the glue fixing component 74 includes a heating frame and a heat radiation unit, the heating frame is fixedly disposed at an end of the mounting frame 71, an open cavity is disposed in the heating frame, and the heat radiation unit is fixedly disposed in the heating frame and is used for outputting heat and transferring the heat to the glue through an opening of the open cavity, specifically, there are three ways of heat transfer, including heat radiation, heat convection and heat contact, the heat contact generally refers to contacting the heated object by means of a heating plate or a heating roller, and this way is applied in this embodiment, the glue is caused to adhere to the glue fixing component 74, the glue layer forming is affected, the heat convection heating generally refers to delivering hot air or hot air to the heated object, this way is applied in this embodiment, the glue layer convection effect is caused and the glue layer deforms before solidification, is not beneficial to the formation of the adhesive layer; the embodiment adopts the thermal radiation mode to heat the glue solution, when guaranteeing the glue film shape, realizes the glue solution solidification of rising temperature effectively, is favorable to the stable shaping of glue film, improves solid gluey effect.
As shown in fig. 1 to 4, in another embodiment of the present invention, the heat radiation units are heating wires, the number of the heat radiation units is multiple, and the multiple heat radiation units are arranged at intervals along the length direction of the open cavity; the height of the opening cavity is greater than the overlapping thickness of the first pole piece group 10, the second pole piece group 20 and the diaphragm 30, so that the heat radiation unit heats glue solution attached to the edges of at least one of the first pole piece group 10, the second pole piece group 20 and the diaphragm 30, and each section of fixing glue layer 40 can effectively bond the first pole piece group 10, the second pole piece group 20 and the diaphragm 30.
As shown in fig. 1 to 4, in another embodiment of the present invention, the base 50 is provided with at least two sets of the avoiding grooves 51 for avoiding the cutting component 72 and the gluing component 73, the avoiding grooves 51 are formed on the mounting station, the number of the avoiding grooves 51 is at least two, all the avoiding grooves 51 are respectively aligned to the interval arrangement one by one, and the adoption of the structure of the avoiding grooves 51 is beneficial to ensuring that the glue fixing component 74 can fix the edges of all the first pole piece groups 10, the second pole piece groups 20 and the diaphragm 30, and preventing the bottom material layer from falling apart due to the glue fixing effect of the glue fixing component 74, and affecting the electrical core slitting formation.
As shown in fig. 1 to 4, another embodiment of the present invention provides a cell slitting method performed by the above-mentioned cell slitting device, including the following steps:
s100: mounting the battery cell monomer to be cut on the base 50 and positioning the battery cell monomer in the mounting station;
s200: the linear driving assembly drives the cutting and sealing assembly to move towards the mounting station;
s300: the cutting component 72 arranged on the mounting rack 71 is driven by the linear driving component, and the output end of the cutting component acts on the interval position to cut the diaphragm 30 into a plurality of sections;
s400: the gluing component 73 arranged on the mounting rack 71 is driven by the linear driving assembly to output glue to the cut position of the diaphragm 30, so that the glue covers the edges of the first pole piece group 10, the second pole piece group 20 and the diaphragm 30;
s500: the glue fixing component 74 arranged on the mounting frame 71 is driven by the linear driving component, and the output end of the glue fixing component aligns to glue solutions covering the edges of the first pole piece group 10, the second pole piece group 20 and the diaphragm 30, so that the glue solutions are solidified and formed into the adhesive glue.
Specifically, compare in the mode that the equipment is cut off in the electric core of prior art directly adopts the hot melt to realize that diaphragm 30 incision fuses the shaping, receive the restriction of ceramic layer, lead to the shaping effect poor, influence product quality and electric core and cut the technical problem that efficiency is unfavorable for enterprise's development, adopt to cut off, rubber coating and solid gluey one shot forming's method of cutting, it is fixed to realize diaphragm 30 obtains the glue film in the short time after cutting off, greatly improve the structural stability after this electric core is cut, the production and preparation efficiency of electric core has been improved effectively, be favorable to enterprise's development.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. The utility model provides a device is cut to electric core for make power battery electric core monomer, this power battery electric core monomer includes: the battery comprises a first pole piece group, a second pole piece group, a diaphragm and a fixed glue layer, wherein the first pole piece group, the diaphragm and the second pole piece group are sequentially overlapped to form a sheet-shaped integral structure, the fixed glue layer is formed at the edge positions of the first pole piece group, the diaphragm and the second pole piece group, the end surfaces of the fixed glue layer are sequentially bonded with the edges of the first pole piece group, the diaphragm and the second pole piece group to enable the first pole piece group, the diaphragm and the second pole piece group to be stably overlapped and molded, the polarities of the first pole piece group and the second pole piece group are opposite to each other, a gap is arranged between the adjacent first pole piece group and the adjacent second pole piece group, and a ceramic interlayer for stabilizing a battery core structure is coated on the diaphragm;
its characterized in that, this device is cut to electric core includes:
the base is provided with an installation station for installing the folded cell body to be cut;
the forming mechanism comprises a portal frame, a linear driving assembly and a cutting and sealing assembly, wherein the portal frame is fixedly arranged on the base, a beam of the portal frame is positioned above the installation station, the linear driving assembly is arranged on the portal frame, the cutting and sealing assembly is arranged at the output end of the linear driving assembly, and the linear driving assembly is used for driving the cutting and sealing assembly to move towards the installation station, so that the output end of the cutting and sealing assembly can contact a to-be-cut cell folding monomer positioned on the installation station;
wherein, the quantity that cuts off the involution subassembly is two sets of at least, all cut off the involution subassembly and align one by one respectively the interval, cut off the involution subassembly and include the mounting bracket, cut off part, rubber coating part and admittedly glue the part, the tip of mounting bracket with sharp drive assembly's output fixed connection, cut off the part the rubber coating part with admittedly glue the part certainly the frame extremely the direction of mounting bracket sets gradually the mounting bracket is kept away from sharp drive assembly's tip, the output that cuts off the part is used for cutting off and is located the interval position the diaphragm, the rubber coating part is used for the coating glue solution in the incision position, admittedly glue the part and is used for promoting the glue solution solidification shaping to do fixed glue film.
2. The cell slitting device according to claim 1, characterized in that: the cutting-off component comprises a first connecting shaft and a heating roller, the first connecting shaft is arranged at the end of the mounting frame, the heating roller is arranged on the first connecting shaft, an electric heating pipe used for heating the outer wall of the heating roller is arranged in the heating roller, the outer wall of the heating roller can be heated and fused to form the diaphragm, and the first connecting shaft and the heating roller are arranged in the length direction of the interval.
3. The cell slitting device according to claim 1, characterized in that: the rubber coating part includes second connecting axle, glue solution shower nozzle and glue spreader, the second connecting axle rotates to be connected the tip of mounting bracket, the glue spreader is fixed to be set up on the second connecting axle, the glue solution shower nozzle sets up just be located on the mounting bracket one side of glue spreader, the output of glue solution shower nozzle is aimed at the glue spreader just is used for spraying the glue solution extremely on the glue spreader, glue solution shower nozzle and outside confession mucilage binding are put the pipe connection.
4. The cell slitting device according to claim 1, characterized in that: the glue fixing component comprises a heating frame and a heat radiation unit, the heating frame is fixedly arranged at the end part of the mounting frame, an opening cavity is formed in the heating frame, and the heat radiation unit is fixedly arranged in the heating frame and used for outputting heat and transmitting the heat to glue liquid through an opening of the opening cavity.
5. The cell slitting device according to claim 4, characterized in that: the heat radiation units are electric heating wires, the number of the heat radiation units is multiple, and the multiple heat radiation units are arranged at intervals along the length direction of the opening cavity;
the height of the opening cavity is larger than the overlapping thickness of the first pole piece group, the second pole piece group and the diaphragm, so that the heat radiation unit heats glue liquid attached to the edges of the first pole piece group, the second pole piece group and the diaphragm at least at one group at the same time.
6. The cell slitting device according to claim 1, characterized in that: the machine base is provided with a yielding groove used for avoiding the gap between the cutting component and the gluing component, the yielding groove is formed in the installation station, the number of the yielding grooves is at least two, and all the yielding grooves are respectively aligned one by one and are arranged at intervals.
7. A battery core slitting method is characterized in that: the battery cell slitting device of any one of claims 1 to 6, which comprises the following steps:
s100: installing the battery cell monomer to be cut on the base and positioning the battery cell monomer in the installation station;
s200: the linear driving assembly drives the cutting and sealing assembly to move towards the mounting station;
s300: the cutting part arranged on the mounting rack is driven by the linear driving assembly, and the output end of the cutting part acts on the interval position to cut the diaphragm into a plurality of sections;
s400: the gluing component arranged on the mounting frame is driven by the linear driving assembly to output glue solution to the notch position of the diaphragm, so that the glue solution covers the first pole piece group, the second pole piece group and the edge of the diaphragm;
s500: the glue fixing component arranged on the mounting frame is driven by the linear driving assembly, and the output end of the glue fixing component is aligned with glue solutions covering the edges of the first pole piece group, the second pole piece group and the diaphragm, so that the glue solutions are solidified and formed into the glue fixing layer.
CN202110361389.2A 2021-04-02 2021-04-02 Battery cell slitting device and battery cell slitting method thereof Active CN113103367B (en)

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TWI521775B (en) * 2013-06-28 2016-02-11 Ｌｇ化學股份有限公司 Electrode assembly manufacturing method including separator cutting process
CN204505323U (en) * 2015-02-04 2015-07-29 深圳市吉阳自动化科技有限公司 A kind of shearing device
CN106654386A (en) * 2015-10-30 2017-05-10 宝山钢铁股份有限公司 Assembly method and equipment for battery cell modules
CN109888161B (en) * 2018-09-11 2022-03-29 拓迪化学(上海)有限公司 Electrode plate and battery cell
US20220069412A1 (en) * 2019-03-29 2022-03-03 Panasonic Corporation Electrode assembly cutting device and separator cutting device
CN212113907U (en) * 2020-04-26 2020-12-08 天津市捷威动力工业有限公司 Lamination device for improving lithium ion battery diaphragm fold
CN111628226B (en) * 2020-06-01 2022-06-21 蜂巢能源科技有限公司 Lamination process and lamination device
CN112467228A (en) * 2020-12-15 2021-03-09 江苏中兴派能电池有限公司 Laminated naked battery cell, preparation method and application thereof

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