WO2019148459A1 - Composite terminal tab strip and manufacturing method of composite terminal tab - Google Patents

Abstract

A composite terminal tab strip and a manufacturing method of a composite terminal tab. The composite terminal tab strip (10) comprises: a first metal strip (11); a plurality of second metal coatings (12), spacedly covering at least one side surface of the first metal strip in a length direction of the first metal strip; and a plurality of insulation pieces (13) spacedly disposed in the length direction of the first metal strip. The composite terminal tabs are configured to be a strip so as to apply insulation pieces thereon during manufacturing without prior cutting, enabling an automated production easily and a simple operation with reduced time and effort.

Description

Composite pole strap and preparation method of composite tab

[Technical Field]

The present invention relates to the field of battery tabs, and more particularly to a method for preparing a composite tab band and a composite tab.

 【Background technique】

When producing a lithium-ion battery, it is necessary to solder the battery of the lithium-ion battery with the protective circuit board or the wire. The positive electrode of the battery is made of metal aluminum. The affinity between the aluminum and the tin is poor, and it cannot be directly secured with the protective plate. Soldered together. Nowadays, the method of making the positive electrode ear in the industry is to first weld the positive electrode metal aluminum and the nickel tape, and the end of the welding with the protection circuit board or the wire is nickel, and the other end is aluminum, and then the insulating film is recompressed. This approach takes advantage of the good affinity of nickel and tin to allow the positive ear to be securely attached to the protective circuit board or wire. However, the production process is troublesome and the production efficiency is low; the poles after welding the nickel strip are extremely easy to be desoldered and easily broken, which also affects the yield of the product and the service life of the product.

 [Summary of the Invention]

The technical problem to be solved by the present invention is to provide a method for preparing a composite tab band and a composite tab, which can produce a tab with time and labor, and has a simple operation process.

In order to solve the above technical problem, the present invention provides a method for preparing a composite tab tape, the method comprising: providing a first metal strip; spacing along a length direction of the first metal strip on at least one side surface of the first metal strip Coating a plurality of second metal coatings; and providing a plurality of insulating films along the length of the first metal strip to form a composite tab strip.

Wherein, the preparation method further comprises: cutting the composite tab band between adjacent two insulating films to form a plurality of composite tab monomers.

Wherein, after the composite tab band is cut between the adjacent two insulating films to form a plurality of composite tab monomers, the method further comprises: sequentially attaching the composite tab unit to the winding strip The surface to wind the winding tape into a predetermined machine.

Wherein, after a plurality of insulating films are disposed at intervals along the length direction of the first metal strip at the boundary between the second metal cladding and the first metal strip to form the composite tab strip, the method further includes: rolling the composite tab Wrap it into a coil and place it in a predetermined machine.

Wherein, the material of the first metal strip is aluminum or copper, the material of the second metal coating is any one of nickel, copper, titanium or tin or a composite of at least two, or the material of the first metal strip is nickel Any one or a combination of at least two of copper, titanium or tin, the material of the second metal coating is aluminum or copper; the first metal strip and the second metal coating are not the same metal.

The step of coating a plurality of second metal coatings along the length direction of the first metal strip on at least one side surface of the first metal strip includes: coating the second metal cladding layer on the first surface by plating On at least one side surface of the metal strip.

The insulating film is disposed at a boundary position between the first metal strip and the second metal coating.

Wherein, the step of arranging a plurality of insulating films at a boundary position of the second metal cladding layer and the first metal strip along the length direction of the first metal strip comprises: disposing the entirety of the insulating film with respect to the second metal cladding layer The boundary line of the first metal strip is offset from the side of the first metal strip that is not covered by the second metal coating by a predetermined distance.

Wherein, the preset distance does not exceed 0.5 mm.

Wherein, the first metal strip has a thickness of 0.03 to 10 mm, and the second metal layer has a thickness of 1 to 100 μm.

In order to solve the above technical problem, the present invention further provides a composite tab band, the composite tab strip comprising: a first metal strip; a plurality of second metal coatings, spaced apart along the length of the first metal strip On at least one side surface of a metal strip; a plurality of insulating films are spaced apart along the length of the first metal strip.

Wherein, the material of the first metal strip is aluminum or copper, the material of the second metal coating is any one of nickel, copper, titanium or tin or a composite of at least two, or the material of the first metal strip is nickel Any one or a combination of at least two of copper, titanium or tin, the material of the second metal coating is aluminum or copper; the first metal strip and the second metal coating are not the same metal.

Wherein, the insulating film has a larger dimension in the width direction of the first metal strip than the first metal strip.

Wherein, the dimension of each of the second metal coatings in the longitudinal direction of the first metal strip is the same as the distance between the adjacent second metal cladding layers.

The insulating film is disposed at a boundary position between the first metal strip and the second metal strip.

Wherein, the entirety of the insulating film is offset from the first metal strip side of the second metal strip by a predetermined distance from the boundary of the second metal strip and the first metal strip; or, the entirety of the insulating film The first metal strip side covered by the second metal coating is offset by a predetermined distance from a boundary line of the second metal coating and the first metal strip.

Wherein, the preset distance does not exceed 0.5 mm.

Wherein, the second metal coating is coated on at least one surface of the first metal strip by plating.

Wherein, the first metal strip has a thickness of 0.03 to 10 mm, and the second metal layer has a thickness of 1 to 100 μm.

Wherein, the composite tab strip further comprises a winding strip connected to one end of the plurality of insulating films to wind the composite tab tape into a coil and placed in a predetermined machine.

In order to solve the above technical problem, the present invention further provides a composite tab band, the composite tab band comprising a plurality of composite tab monomers, each composite tab unit comprising: a first metal strip; a second metal clad layer And partially covering the first metal strip on the surface of the first metal strip along the length direction of the first metal strip; the insulating film covering the boundary between the second metal strip and the first metal strip; the winding strip is connected to One end of a plurality of insulating films is used to connect a plurality of composite tab elements into a strip shape.

Wherein, the material of the first metal strip is aluminum or copper, the material of the second metal coating is any one of nickel, copper, titanium or tin or a composite of at least two, or the material of the first metal strip is nickel Any one or a combination of at least two of copper, titanium or tin, and the material of the second metal coating is aluminum or copper.

The entirety of the insulating film is offset from the side of the first metal strip that is not covered by the second metal coating by a predetermined distance from the boundary between the second metal cladding and the first metal strip.

The invention has the beneficial effects that the invention is different from the prior art, and the composite tab is provided with a strip shape, and a composite tab strip has a plurality of composite tabs, so that the composite tab strip can be produced during manufacture. Covering the insulating film first, it is easy to realize automatic production without first cutting, so it saves time and effort and is easy to operate.

 [Description of the Drawings]

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work, and also belong to the protection scope of the present invention.

1 is a schematic structural view of an embodiment of a composite tab band of the present invention;

2 is a schematic structural view of another embodiment of a composite tab band of the present invention;

3 is a schematic flow chart of an embodiment of a method for preparing a composite tab of the present invention;

4 is a schematic flow chart of another embodiment of a method for preparing a composite tab of the present invention;

Fig. 5 is a schematic flow chart showing still another embodiment of the method for preparing a composite tab of the present invention.

【Detailed ways】

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. In particular, the following examples are merely illustrative of the invention, but are not intended to limit the scope of the invention. Also, the following embodiments are only some of the embodiments of the present invention, and not all of the embodiments, and all other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention.

The terms "first", "second", "third", "fourth" and the like in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe specific Order or order. It is to be understood that the data so used may be interchanged as appropriate, such that the embodiments of the invention described herein can be implemented, for example, in a sequence other than those illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

Referring to Figure 1, Figure 1 is a schematic view showing the structure of an embodiment of a composite tab band of the present invention. As shown in FIG. 1, the composite tab band 10 of the present embodiment includes a first metal strip 11, a plurality of second metal clad layers 12, and a plurality of insulating films 13.

A plurality of second metal cladding layers 12 are circumferentially coated on at least one side surface of the first metal strip 11 along the length direction of the first metal strip 11. Preferably, the material of the first metal strip 11 is aluminum or copper, and the material of the second metal coating 12 is any one of nickel, copper, titanium or tin or a composite of at least two. Alternatively, the material of the first metal strip 11 is a composite of any one or at least two of nickel, copper, titanium or tin, and the material of the second metal coating 12 is aluminum or copper. The first metal strip is not the same metal as the second metal cladding. Specifically, when the composite tab band is used to make a positive electrode ear, the material of the first metal strip 11 is aluminum, and the material of the second metal clad layer 12 is any one of nickel, copper, titanium or tin or at least two Kind of composite, or the material of the first metal strip 11 is any one of nickel, copper, titanium or tin or a composite of at least two, the material of the second metal coating 12 is aluminum; when the composite pole When the ear strap is used for making the negative electrode ear, the material of the first metal strip 11 is copper, and the material of the second metal coating layer 12 is any one of nickel, titanium or tin or a composite of at least two, or first The material of the metal strip 11 is a composite of any one or at least two of nickel, titanium or tin, and the material of the second metal coating 12 is copper.

In the present embodiment, the dimension of each of the second metal cladding layers 12 in the longitudinal direction of the first metal strip 11 is the same as the distance between the adjacent second metal cladding layers 12. In other embodiments, the magnitude relationship between the dimension of the second metal cladding layer 12 in the longitudinal direction of the first metal strip 11 and the distance between the adjacent second metal cladding layers 12 may be adjusted as needed. When the second metal cladding layer 12 is required to be slightly longer, the dimension of the second metal cladding layer 12 in the longitudinal direction of the first metal strip 11 is adjusted to be larger than the distance between the adjacent second metal cladding layers 12. When the second metal cladding layer 12 is required to be slightly shorter, the dimension of the second metal cladding layer 12 in the longitudinal direction of the first metal strip 11 is adjusted to be smaller than the distance between the adjacent second metal cladding layers 12.

A plurality of insulating films 13 are spaced apart along the length direction of the first metal strip 11. Preferably, the insulating film 13 has a larger dimension in the width direction of the first metal strip 11 than the first metal strip 11 to ensure coverage of the insulating film 13.

In other embodiments, the insulating film 13 may be disposed at a boundary position between the second metal cladding 12 and the first metal strip 11, or the entirety of the insulating film 13 may be opposite to the second metal cladding 12 and the first metal strip 11 The boundary line is offset from the side of the first metal strip 11 that is not covered by the second metal cladding 12 by a predetermined distance. Preferably, the preset distance does not exceed 0.5 mm. Since the position hardness of the second metal clad layer 12 is high, if the composite tab tape 10 is subjected to a curling operation, the insulating film 13 may be displaced during curling, and the above arrangement is for preventing the offset.

In the present embodiment, the second metal coating 12 is coated on at least one surface of the first metal strip 11 by plating. In other embodiments, the second metal coating 12 may be coated on at least one side surface of the first metal strip 11 by printing or the like.

Wherein, the first metal strip 11 has a thickness of 0.03 to 10 mm, and the second metal clad layer 12 has a thickness of 1 to 100 μm. Preferably, the thickness of the first metal strip 11 is greater than the thickness of the second metal clad layer 12, or the thickness of the first metal strip 11 is at least 10 times the thickness of the second metal layer.

By arranging the composite tabs in a strip shape, a composite tab strip has a plurality of composite tabs, so that the composite tab strip can be covered with the insulating film first, which can be easily cut without first cutting. The realization of automated production, so save time and effort, simple operation.

Referring to Figure 2, Figure 2 is a schematic view showing the structure of another embodiment of the composite tab band of the present invention. In the present embodiment, the composite tab band 20 includes a composite tab unit 21 and a winding strip 22.

The composite tab unit 21 includes a first metal strip 211, a second metal clad layer 212, and an insulating film 213. The second metal coating 212 is circumferentially coated on at least one side surface of the first metal strip 211 along the length direction of the first metal strip 211. Preferably, the material of the first metal strip 211 is aluminum or copper, and the material of the second metal coating 212 is any one of nickel, copper, titanium or tin or a composite of at least two. Alternatively, the material of the first metal strip 211 is a composite of any one or at least two of nickel, copper, titanium or tin, and the material of the second metal coating 212 is aluminum or copper. The first metal strip 211 and the second metal cap 212 do not have the same metal. Specifically, when the composite tab unit is a positive electrode ear, the material of the first metal strip 11 is aluminum, and the material of the second metal coating layer 12 is any one of nickel, copper, titanium or tin or at least two The composite, or the material of the first metal strip 11 is a composite of any one or at least two of nickel, copper, titanium or tin, and the material of the second metal coating 12 is aluminum; when the composite tab is When the monomer is a negative electrode ear, the material of the first metal strip 11 is copper, and the material of the second metal coating 12 is any one of nickel, titanium or tin or a composite of at least two, or the first metal strip The material of 11 is a composite of any one or at least two of nickel, titanium or tin, and the material of the second metal coating 12 is copper.

The insulating film 213 is disposed at a boundary position of the second metal cladding 212 and the first metal strip 211. Preferably, the size of the insulating film 213 in the width direction of the first metal strip 211 is larger than the width of the first metal strip 211 to ensure the coverage of the insulating film 213.

In other embodiments, the entirety of the insulating film 213 may be offset from the first metal strip 211 side that is not covered by the second metal coating 212 with respect to the boundary line of the second metal cladding 212 and the first metal strip 211. Scheduled distance. Preferably, the predetermined distance does not exceed 0.5 mm. Since the position hardness covered by the second metal coating 212 is high, if the composite tab is subjected to a curling operation, the insulating film 213 may be displaced at the time of curling, and the above arrangement is for preventing the offset.

Wherein, the first metal strip 211 has a thickness of 0.03 to 10 mm, and the second metal clad layer 212 has a thickness of 1 to 100 μm. Preferably, the thickness of the first metal strip 211 is greater than the thickness of the second metal coating 212, or the thickness of the first metal strip 211 is at least 10 times the thickness of the second metal coating.

The winding tape 22 is connected to one end of the plurality of insulating films 213 to connect the plurality of composite tab elements 21 in a strip shape. In this way, the winding tape 22 can be wound into the machine, making it convenient for the machine to operate.

Referring to FIG. 3, FIG. 3 is a schematic flow chart of an embodiment of a method for preparing a composite tab of the present invention. In this embodiment, the method for preparing the composite tab includes the steps of:

In step S31, a first metal strip is provided.

In step S32, a plurality of second metal coating layers are circumferentially coated on at least one side surface of the first metal strip along the length direction of the first metal strip. Preferably, the material of the first metal strip is aluminum or copper, and the material of the second metal coating is any one of nickel, copper, titanium or tin or a composite of at least two. Alternatively, the material of the first metal strip is a composite of any one or at least two of nickel, copper, titanium or tin, the material of the second metal coating is aluminum or copper, and the first metal strip 211 and the second There is no metal in the metal coating 212. Specifically, when the composite tab unit is a positive electrode ear, the material of the first metal strip 11 is aluminum, and the material of the second metal coating layer 12 is any one of nickel, copper, titanium or tin or at least two The composite, or the material of the first metal strip 11 is a composite of any one or at least two of nickel, copper, titanium or tin, and the material of the second metal coating 12 is aluminum; when the composite tab is When the monomer is a negative electrode ear, the material of the first metal strip 11 is copper, and the material of the second metal coating 12 is any one of nickel, titanium or tin or a composite of at least two, or the first metal strip The material of 11 is a composite of any one or at least two of nickel, titanium or tin, and the material of the second metal coating 12 is copper. In this step, the second metal coating may be coated on at least one side surface of the first metal strip by plating. Wherein, the first metal strip has a thickness of 0.03 to 10 mm, and the second metal layer has a thickness of 1 to 100 μm. Preferably, the thickness of the first metal strip is greater than the thickness of the second metal coating, or the thickness of the first metal strip is at least 10 times the thickness of the second metal layer.

In step S33, a plurality of insulating films are spaced apart along the longitudinal direction of the first metal strip to form a composite tab band. In this step, a plurality of insulating films may be disposed at intervals between the second metal cladding and the first metal strip, or the entirety of the insulating film may be disposed relative to the second metal cladding and the first metal strip. The boundary line is offset toward the side of the first metal strip that is not covered by the second metal coating. Preferably, the overall offset position of the insulating film does not exceed 0.5 mm.

Referring to FIG. 4, FIG. 4 is a schematic flow chart of another embodiment of a method for preparing a composite tab of the present invention. In this embodiment, the method for preparing the composite tab includes the steps of:

In step S41, a first metal strip is provided.

In step S42, a plurality of second metal coating layers are circumferentially coated on at least one side surface of the first metal strip along the longitudinal direction of the first metal strip.

In step S43, a plurality of insulating films are spaced apart along the longitudinal direction of the first metal strip to form a composite tab band. These three steps are the same as steps S31 to S33 in the previous embodiment, and are not described herein again.

In step S44, the composite tab tape is wound into a coil to be placed in a predetermined machine.

Referring to FIG. 5, FIG. 5 is a schematic flow chart of still another embodiment of a method for preparing a composite tab of the present invention. In this embodiment, the method for preparing the composite tab includes the steps of:

In step S51, a first metal strip is provided.

In step S52, a plurality of second metal coating layers are circumferentially coated on at least one side surface of the first metal strip along the length direction of the first metal strip.

In step S53, a plurality of insulating films are spaced apart along the longitudinal direction of the first metal strip to form a composite tab band. These three steps are the same as steps S31 to S33 in the foregoing embodiment, and are not described herein again.

In step S54, the composite tab strips are respectively cut between adjacent two insulating films to form a plurality of composite tab elements.

In step S55, the composite tab unit is sequentially attached to the surface of the winding belt to wind the winding tape into a predetermined machine.

In other embodiments, whether or not to use step S55 may be determined as needed. That is, step S51 to step S54 are also a complete method.

The invention has the beneficial effects that the invention is different from the prior art, and the composite tab is provided with a strip shape, and a composite tab strip has a plurality of composite tabs, so that the composite tab strip can be produced during manufacture. Covering the insulating film first, it is easy to realize automatic production without first cutting, so it saves time and effort and is easy to operate.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims (23)

1. A method for preparing a composite tab, characterized in that the preparation method comprises:

   Providing a first metal strip;

   Coating a plurality of second metal coatings on at least one side surface of the first metal strip along a length direction of the first metal strip;

   A plurality of insulating films are disposed along the length direction of the first metal strip to form a composite tab band.
2. The preparation method according to claim 1, wherein the preparation method further comprises:

   The composite tab strip is cut between two adjacent insulating films to form a plurality of composite tab monomers.
3. The method according to claim 2, wherein said composite tab band is cut between said adjacent two of said insulating films to form a plurality of composite tabs The method further includes:

   The composite tab monomer is sequentially attached to the surface of the winding tape to wind the winding tape into a predetermined machine.
4. The method according to claim 1, wherein a plurality of intervals are formed at a boundary position of the second metal strip and the first metal strip along a length direction of the first metal strip After insulating the film to form a composite tab band, the method further includes:

   The composite tab tape is wound into a coil and placed in a predetermined machine.
5. The method according to claim 1, wherein the material of the first metal strip is aluminum or copper, and the material of the second metal layer is any one of nickel, copper, titanium or tin or At least two composites, or the material of the first metal strip is a composite of any one or at least two of nickel, copper, titanium or tin, and the material of the second metal coating is aluminum or copper The first metal strip is not the same metal as the second metal coating.
6. The method according to claim 1, wherein the plurality of second metal cladding layers are circumferentially coated on at least one side surface of the first metal strip along a length direction of the first metal strip The steps include:

   The second metal coating is coated on at least one side surface of the first metal strip by plating.
7. The preparation method according to claim 1, wherein the insulating film is disposed at a boundary position between the first metal strip and the second metal coating.
8. The method according to claim 1, wherein the plurality of insulations are spaced apart at a boundary position of the second metal cladding layer and the first metal strip along a length direction of the first metal strip The steps of the film include:

   Disposing the entirety of the insulating film to a side of the first metal strip that is not covered by the second metal coating with respect to a boundary line between the second metal cladding and the first metal strip Move the preset distance.
9. The preparation method according to claim 1, wherein the predetermined distance does not exceed 0.5 mm.
10. The method according to claim 1, wherein the first metal strip has a thickness of 0.03 to 10 mm, and the second metal layer has a thickness of 1 to 100 μm.
11. A composite tab band, characterized in that the composite tab band comprises:

    First metal strip;

    a plurality of second metal coatings are circumferentially coated on at least one side surface of the first metal strip along a length direction of the first metal strip;

    A plurality of insulating films are spaced apart along the length of the first metal strip.
12. The composite tab band according to claim 11, wherein the material of the first metal strip is aluminum or copper, and the material of the second metal layer is any one of nickel, copper, titanium or tin. Or at least two kinds of composites, or the material of the first metal strip is a composite of any one or at least two of nickel, copper, titanium or tin, and the material of the second metal coating is aluminum Or copper; the first metal strip and the second metal cladding are not the same metal.
13. The composite tab tape according to claim 11, wherein said insulating film has a larger dimension in a width direction of said first metal strip than said first metal strip.
14. The composite tab tape according to claim 11, wherein a dimension of each of said second metal cladding layers in a length direction of said first metal strip and an adjacent said second metal cladding layer The distance between them is the same.
15. The composite tab tape according to claim 11, wherein the insulating film is disposed at a boundary position between the first metal strip and the second metal strip.
16. The composite tab tape according to claim 11, wherein the entirety of the insulating film is not covered by the second metal with respect to a boundary line of the second metal cladding and the first metal strip One side of the first metal strip coated by the layer is offset by a predetermined distance; or the entirety of the insulating film is opposite to the boundary line of the second metal layer and the first metal strip The side of the first metal strip covered by the two metal cladding is offset by a predetermined distance.
17. The composite tab band of claim 11 wherein said predetermined distance does not exceed 0.5 mm.
18. The composite tab tape according to claim 11, wherein the second metal coating is plated on at least one side surface of the first metal strip.
19. The composite tab strip of claim 11 wherein said first metal strip has a thickness of from 0.03 to 10 mm and said second metal coating has a thickness of from 1 to 100 microns.
20. The composite tab band according to any one of claims 11 to 19, wherein the composite tab tape further comprises a winding tape connected to one end of the plurality of the insulating films, The composite tab tape is wound into a coil and placed in a predetermined machine.
21. A composite tab band, characterized in that the composite tab band comprises a plurality of composite tab monomers, each of the composite tab monomers comprising:

    First metal strip;

    a second metal coating partially coated on at least one side surface of the first metal strip in a plating manner along a length direction of the first metal strip;

    An insulating film covering a boundary between the second metal strip and the first metal strip;

    A winding tape is coupled to one end of the plurality of insulating films to connect the plurality of composite tab monomers into a strip shape.
22. The composite positive electrode ear strap according to claim 21, wherein the material of the first metal strip is aluminum or copper, and the material of the second metal coating is any one of nickel, copper, titanium or tin. Or at least two kinds of composites, or the material of the first metal strip is a composite of any one or at least two of nickel, copper, titanium or tin, and the material of the second metal coating is aluminum Or copper.
23. The composite positive electrode ear strap according to claim 21, wherein the entirety of the insulating film is not covered by the second metal with respect to a boundary line of the second metal coating and the first metal strip The side of the first metal strip covered by the layer is offset by a predetermined distance.