CN113725396A - Current collector production method and production device - Google Patents
Current collector production method and production device Download PDFInfo
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- CN113725396A CN113725396A CN202111028346.9A CN202111028346A CN113725396A CN 113725396 A CN113725396 A CN 113725396A CN 202111028346 A CN202111028346 A CN 202111028346A CN 113725396 A CN113725396 A CN 113725396A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 239000002313 adhesive film Substances 0.000 claims abstract description 91
- 239000002131 composite material Substances 0.000 claims abstract description 67
- 230000007246 mechanism Effects 0.000 claims abstract description 67
- 238000007731 hot pressing Methods 0.000 claims abstract description 29
- 238000013329 compounding Methods 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims description 31
- 230000005540 biological transmission Effects 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 13
- 238000010030 laminating Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 8
- 238000004801 process automation Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 99
- 150000002500 ions Chemical class 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a current collector production method and a production device, wherein the method comprises the following steps: controlling a pole piece conveying mechanism to drive a pole piece to unreel and roll; controlling the adhesive film unwinding mechanism group to drive the adhesive film to unwind and roll; the pole piece is positioned between the two adhesive films; controlling the conducting film unreeling mechanism set to drive the conducting film to unreel and roll; the adhesive film is positioned between the two conductive films; the outer edge of the adhesive film is flush with the outer edge of the conductive film; superposing the conductive film and the adhesive film on the first side of the pole piece to form a first composite film, and superposing the conductive film and the adhesive film on the second side of the pole piece to form a second composite film; and the first composite film, the pole piece and the second composite film are subjected to hot-pressing compounding to form a current collector; this application has realized the mass flow body of five layer structures of full process automation production to guaranteed that the mass flow body has better yields.
Description
Technical Field
The invention relates to the technical field of water-based ion batteries, in particular to a current collector production method and a current collector production device.
Background
With the continuous consumption of fossil energy and the continuous increase of the energy demand of human development, the development of renewable energy is imperative, and the key to the development of renewable energy and the alleviation of energy crisis and environmental pressure is to convert intermittent energy such as solar energy, wind energy and tidal energy into continuous energy supply, so that the energy storage device becomes a research hotspot. Secondary batteries have attracted considerable attention because of their characteristics such as high energy density, long cycle life, and high voltage. However, the conventional secondary batteries (nickel-metal hydride batteries and lithium ion batteries) adopt organic electrolyte, and the batteries have the defects of flammability, toxicity, high manufacturing cost, strict requirements on assembly conditions and the like, are easy to cause environmental pollution, and are not beneficial to sustainable development of the environment. The water-based ion battery can effectively solve the problems, so the water-based ion battery has wide application prospect.
As shown in fig. 1, the five-layer current collector of the aqueous ion battery includes two conductive thin films 101, two conductive adhesive films 102, and a pole piece layer 103. The pole piece layer 103 is located between two layers of conductive adhesive films 102, and the conductive adhesive films 102 are located between two layers of conductive films 101. In the prior art, the full-process automatic production of the current collector with the five-layer structure cannot be realized, so that the production efficiency is low, and the product yield cannot be guaranteed.
Disclosure of Invention
In view of this, the invention provides a current collector production method and a current collector production device, which realize full-process automated production of a current collector with a five-layer structure.
According to an aspect of the present invention, there is provided a current collector production method, including the steps of:
s110, controlling a pole piece conveying mechanism to drive a pole piece to unreel and roll;
s120, controlling the adhesive film unreeling mechanism set to drive the adhesive film to unreel and roll; the pole piece is positioned between the two adhesive films;
s130, controlling the conducting film unwinding mechanism group to drive the conducting film to unwind and roll; the adhesive film is positioned between the two conductive films; the outer edge of the adhesive film is flush with the outer edge of the conductive film;
s140, overlapping the conductive film and the adhesive film on the first side of the pole piece to form a first composite film, and overlapping the conductive film and the adhesive film on the second side of the pole piece to form a second composite film; and
s150, carrying out hot-pressing compounding on the first composite film, the pole piece and the second composite film to form a current collector.
Optionally, the step S140 includes:
laminating the conductive film and the adhesive film positioned on the second side of the pole piece by using a supporting roller to form a second composite film and supporting the pole piece for transmission; the supporting roller is positioned below the pole piece in the transmission direction.
Optionally, the step S150 includes:
s151, transmitting the pole piece and the second composite film to a hot pressing unit based on the supporting roller;
s152, heating the first composite film, the pole piece and the second composite film to a target temperature based on the hot pressing unit, and then pressing to form an initial current collector; and
and S153, cooling the initial current collector to obtain an intermediate current collector.
Optionally, the method further comprises the step of:
s160, cutting the intermediate current collector to form a finished current collector; the cross section area of the adhesive film in each finished current collector is equal to the cross section area of the conductive film.
Optionally, the step S110 includes:
and removing the lubricant on the surface of the pole piece.
Optionally, each adhesive film unwinding mechanism set comprises two adhesive film unwinding mechanisms located on two sides of the pole piece in the transmission direction, and each conductive film unwinding mechanism set comprises two conductive film unwinding mechanisms located on two sides of the pole piece in the transmission direction;
the step S120 includes:
controlling the adhesive film unwinding mechanism to drive the adhesive film to unwind and roll;
the step S130 includes:
and controlling the conducting film unwinding mechanism to drive the conducting film to unwind and roll.
Optionally, the step S110 includes:
the initial pole piece is driven to unreel and roll;
rolling and cutting the initial pole piece according to a preset die cutting plate to form a middle pole piece;
cutting and molding the middle pole piece to obtain a pole piece material;
the step S150 includes:
and carrying out hot-pressing compounding on the first composite film, the pole piece material and the second composite film to form a current collector.
Optionally, the method further comprises the step of:
and stacking the finished current collector obtained after cutting.
According to another aspect of the present invention, there is provided a current collector production apparatus for implementing any one of the above current collector production methods, the apparatus comprising:
the pole piece conveying mechanism is used for driving the pole pieces to unreel and roll;
the adhesive film unwinding mechanism group is used for driving the adhesive film to unwind and roll;
the conducting film unwinding mechanism set is used for driving the conducting film to unwind and roll; the pole piece is positioned between two layers of adhesive films, and the adhesive films are positioned between two layers of conductive films; the outer edge of the adhesive film is flush with the outer edge of the conductive film; and
and the pressing mechanism is used for laminating the conductive film and the adhesive film positioned on the first side of the pole piece to form a first composite film, laminating the conductive film and the adhesive film on the second side to form a second composite film, and performing hot-pressing compounding on the first composite film, the pole piece and the second composite film to form a current collector.
Optionally, the pressing mechanism comprises a supporting roller and a hot pressing unit; the supporting roller is positioned below the pole piece in the transmission direction and is used for laminating the conductive film and the adhesive film positioned on the second side of the pole piece to form a second composite film and supporting the pole piece and the second composite film to be transmitted to the hot pressing unit;
and the hot pressing unit is used for heating the first composite film, the pole piece and the second composite film to a target temperature and then pressing to form an initial current collector.
Compared with the prior art, the invention has the beneficial effects that:
according to the current collector production method and the production device, the adhesive film is driven to unreel and roll by the adhesive film unreeling mechanism set, the conductive film is driven to unreel and roll by the conductive film unreeling mechanism set, the conductive film and the adhesive film on the first side of the pole piece are overlapped to form the first composite film, the conductive film and the adhesive film on the second side of the pole piece are overlapped to form the second composite film, and then the first composite film, the pole piece and the second composite film are subjected to hot-pressing compounding, so that the current collector with a five-layer structure is automatically produced in the whole process, and the current collector has good yield.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural view of a current collector of a five-layer structure;
fig. 2 is a schematic flow chart of a current collector manufacturing method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of step S150 in the current collector manufacturing method according to an embodiment of the disclosure;
fig. 4 is a schematic structural diagram of a current collector manufacturing apparatus according to an embodiment of the present invention.
Reference numerals
The device comprises a conductive film-101, a conductive adhesive film-102, a pole piece layer-103, a pole piece unwinding roller-401, a pole piece die cutting unit-402, a pole piece cutting unit-403, an adhesive film unwinding mechanism set-404, a conductive film unwinding mechanism set-405, a pressing mechanism-406, a support roller-407, a current collector cutting unit-408, a stacking unit-409 and a current collector-410.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, materials, devices, etc. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising," "having," and "providing" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
As shown in fig. 2, an embodiment of the present invention discloses a method for producing a current collector, which is characterized by comprising the following steps:
and S110, controlling the pole piece conveying mechanism to drive the pole pieces to unreel and roll. Specifically, the step S110 may include:
and removing the lubricant on the surface of the initial pole piece.
And (4) driving the initial pole piece to unreel and roll.
And rolling and cutting the initial pole piece according to a preset die cutting plate to form a middle pole piece. And
and cutting and molding the middle pole piece to obtain a pole piece material.
The preset die cutting plate can be generated according to a pattern required by product design, and the initial pole piece is die-cut under the action of pressure to obtain a required shape.
In one embodiment, the pole piece conveying mechanism comprises a pole piece unwinding roller, a pole piece die cutting unit and a pole piece slitting unit which are sequentially distributed along the transmission direction of the pole piece. The pole piece unwinding roller drives the initial pole piece to unwind and roll. The pole piece die cutting unit is used for roll cutting the initial pole piece into a middle pole piece according to a preset die cutting plate. The pole piece slitting unit is used for slitting and molding the middle pole piece to obtain a pole piece material. The operation of removing the lubricant on the surface of the initial pole piece can be realized by referring to the prior art, and is not described in detail in the application.
And S120, controlling the adhesive film unwinding mechanism group to drive the adhesive film to unwind and roll. The pole piece is positioned between the two layers of adhesive films. In this embodiment, each of the adhesive film unwinding mechanisms includes two adhesive film unwinding mechanisms located at two sides of the transmission direction of the pole piece, that is, one adhesive film unwinding mechanism is disposed at each side. The adhesive film unwinding mechanism drives the adhesive film to unwind and roll.
And S130, controlling the conducting film unwinding mechanism group to drive the conducting film to unwind and roll. The adhesive film is positioned between the two conductive films. And the outer edge of the adhesive film is flush with the outer edge of the conductive film. In this embodiment, the unreeled adhesive film has a width equal to that of the conductive film. The width direction of the adhesive film is the direction vertical to the unreeling direction of the adhesive film.
In this embodiment, each of the conductive film unwinding mechanisms includes two conductive film unwinding mechanisms located on two sides of the pole piece in the transmission direction. The conducting film unwinding mechanism drives the conducting film to unwind and roll.
In this embodiment, the unwinding speeds of the pole piece conveying mechanism, the adhesive film unwinding mechanism set and the conductive film unwinding mechanism set are the same, and the pole piece conveying mechanism, the adhesive film unwinding mechanism set and the conductive film unwinding mechanism set can start unwinding at the same time.
And S140, overlapping the conductive film and the adhesive film on the first side of the pole piece to form a first composite film, and overlapping the conductive film and the adhesive film on the second side of the pole piece to form a second composite film. Specifically, the conductive film and the adhesive film on the second side of the pole piece can be laminated to form a second composite film by using a support roll, and the support roll is further used for supporting the pole piece before the pole piece is driven to the hot pressing unit. The supporting roller is positioned below the pole piece in the transmission direction. The one adhesive film unwinding mechanism and the one conductive film unwinding mechanism are positioned on the same side of the pole piece in the transmission direction with the supporting roll. The hot pressing unit may include a driving roller, and the driving roller may be used to laminate the conductive film and the adhesive film on the first side of the pole piece to form the first composite film.
And S150, carrying out hot-pressing compounding on the first composite film, the pole piece and the second composite film to form a current collector. Specifically, as shown in fig. 3, the step S150 includes:
and S151, transmitting the pole piece and the second composite film to a hot pressing unit based on the supporting roller.
And S152, heating the first composite film, the pole piece material and the second composite film to a target temperature based on the hot pressing unit, and then pressing to form an initial current collector. And
and S153, cooling the initial current collector to obtain an intermediate current collector.
In specific implementation, the step S152 may be implemented by roll-pressing, for example, two heating rollers may be disposed on the upper and lower sides of the combined structure formed by the first composite film, the pole piece material, and the second composite film in the hot-pressing unit, and the temperature of the heating rollers may be set to be in a range of 50 ℃ to 150 ℃.
In another embodiment of the present application, on the basis of any of the above embodiments, the disclosed current collector production method further includes the steps of:
and S160, cutting the intermediate current collector to form a finished current collector. The cross section area of the adhesive film in each finished current collector is equal to the cross section area of the conductive film. The cross sections all refer to a cross section direction perpendicular to the thickness direction of the current collector.
In another embodiment of the present application, on the basis of any of the above embodiments, the disclosed current collector production method further includes the steps of:
and S170, stacking the finished current collector obtained after cutting.
It should be noted that all the above embodiments disclosed in the present application can be freely combined, and the technical solutions obtained by combining them are also within the scope of the present application.
As shown in fig. 4, another embodiment of the present invention further discloses a current collector production apparatus, which is configured to implement the current collector production method disclosed in any of the above embodiments, where the apparatus includes: a pole piece conveying mechanism, at least one adhesive film unwinding mechanism set 404, at least one conductive film unwinding mechanism set 405 and a pressing mechanism 406.
The pole piece conveying mechanism is used for driving the pole pieces to unreel and roll. The adhesive film unwinding mechanism 404 is used for driving the adhesive film to unwind and roll. The conductive film unwinding mechanism 405 is used for driving the conductive film to unwind and roll. The pole piece is positioned between two layers of the adhesive films, and the adhesive films are positioned between two layers of the conductive films; and the outer edge of the adhesive film is flush with the outer edge of the conductive film.
The pressing mechanism 406 is used for laminating the conductive film and the adhesive film on the first side of the electrode plate to form a first composite film, laminating the conductive film and the adhesive film on the second side of the electrode plate to form a second composite film, and thermally pressing and compounding the first composite film, the electrode plate, and the second composite film to form the current collector 410.
In this embodiment, the pole piece conveying mechanism includes a pole piece unwinding roller 401, a pole piece die cutting unit 402, and a pole piece slitting unit 403, which are sequentially distributed along the transmission direction of the pole piece. The pole piece unwinding roller 401 drives the initial pole piece to unwind and roll, and the pole piece die cutting unit 402 rolls and cuts the initial pole piece according to a preset die cutting plate to form a middle pole piece. The preset die-cutting plate can be generated according to a pattern required by product design, and the initial pole piece is die-cut under the action of the pressure of the pole piece die-cutting unit 402 to obtain a required shape. The pole piece slitting unit 403 is used for slitting and molding the middle pole piece to obtain a pole piece material.
In this embodiment, the pressing mechanism 406 includes a supporting roller 407 and a hot pressing unit. The support roller 407 is located below the pole piece in the transmission direction, and is configured to laminate the conductive film and the adhesive film located on the second side of the pole piece to form a second composite film, and to support the pole piece and the second composite film to be transmitted to the hot pressing unit.
And the hot pressing unit is used for heating the first composite film, the pole piece material and the second composite film to a target temperature, then performing pressing and cooling to form an initial current collector.
The pressing mechanism, the current collector cutting unit 408 and the stacking unit 409 are sequentially distributed along the transmission direction of the pole piece. The current collector cutting unit 408 is used for cutting the initial current collector output by the hot pressing unit to obtain a current collector 410. The stacking unit 409 stacks the current collectors 410.
In summary, the current collector production method and the current collector production device provided by the invention have at least the following advantages:
according to the current collector production method and the production device, the adhesive film unwinding and rolling are driven by the adhesive film unwinding mechanism set, the conductive film unwinding and rolling is driven by the conductive film unwinding mechanism set, the conductive film and the adhesive film on the first side of the pole piece are overlapped to form the first composite film, the conductive film and the adhesive film on the second side of the pole piece are overlapped to form the second composite film, and then the first composite film, the pole piece and the second composite film are subjected to hot-pressing compounding, so that the current collector with a five-layer structure is automatically produced in the whole process, and the current collector has a good yield.
In the description of the present invention, it is to be understood that the terms "bottom", "longitudinal", "lateral", "upper", "lower", "front", "rear", "vertical", "horizontal", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are used only for convenience in describing the present invention and for simplification of description, and do not indicate or imply that the structures or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more and "several" means one or more unless otherwise specified.
In the description herein, references to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," etc., indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A method for producing a current collector, comprising the steps of:
s110, controlling a pole piece conveying mechanism to drive a pole piece to unreel and roll;
s120, controlling the adhesive film unreeling mechanism set to drive the adhesive film to unreel and roll; the pole piece is positioned between the two adhesive films;
s130, controlling the conducting film unwinding mechanism group to drive the conducting film to unwind and roll; the adhesive film is positioned between the two conductive films; the outer edge of the adhesive film is flush with the outer edge of the conductive film;
s140, overlapping the conductive film and the adhesive film on the first side of the pole piece to form a first composite film, and overlapping the conductive film and the adhesive film on the second side of the pole piece to form a second composite film; and
s150, carrying out hot-pressing compounding on the first composite film, the pole piece and the second composite film to form a current collector.
2. The current collector production method of claim 1, wherein the step S140 includes:
laminating the conductive film and the adhesive film positioned on the second side of the pole piece by using a supporting roller to form a second composite film and supporting the pole piece for transmission; the supporting roller is positioned below the pole piece in the transmission direction.
3. The current collector production method of claim 2, wherein the step S150 comprises:
s151, transmitting the pole piece and the second composite film to a hot pressing unit based on the supporting roller;
s152, heating the first composite film, the pole piece and the second composite film to a target temperature based on the hot pressing unit, and then pressing to form an initial current collector; and
and S153, cooling the initial current collector to obtain an intermediate current collector.
4. The method for producing a current collector of claim 3, further comprising the step of:
s160, cutting the intermediate current collector to form a finished current collector; the cross section area of the adhesive film in each finished current collector is equal to the cross section area of the conductive film.
5. The current collector production method as claimed in claim 1, wherein the step S110 includes:
and removing the lubricant on the surface of the pole piece.
6. The current collector production method of claim 1, wherein each adhesive film unwinding mechanism set comprises two adhesive film unwinding mechanisms located on two sides of the pole piece transmission direction, and each conductive film unwinding mechanism set comprises two conductive film unwinding mechanisms located on two sides of the pole piece transmission direction;
the step S120 includes:
controlling the adhesive film unwinding mechanism to drive the adhesive film to unwind and roll;
the step S130 includes:
and controlling the conducting film unwinding mechanism to drive the conducting film to unwind and roll.
7. The current collector production method as claimed in claim 1, wherein the step S110 includes:
the initial pole piece is driven to unreel and roll;
rolling and cutting the initial pole piece according to a preset die cutting plate to form a middle pole piece;
cutting and molding the middle pole piece to obtain a pole piece material;
the step S150 includes:
and carrying out hot-pressing compounding on the first composite film, the pole piece material and the second composite film to form a current collector.
8. The method for producing a current collector of claim 4, further comprising the step of:
and stacking the finished current collector obtained after cutting.
9. A current collector production apparatus for implementing the current collector production method according to claim 1, characterized in that the apparatus comprises:
the pole piece conveying mechanism is used for driving the pole pieces to unreel and roll;
the adhesive film unwinding mechanism group is used for driving the adhesive film to unwind and roll;
the conducting film unwinding mechanism set is used for driving the conducting film to unwind and roll; the pole piece is positioned between two layers of adhesive films, and the adhesive films are positioned between two layers of conductive films; the outer edge of the adhesive film is flush with the outer edge of the conductive film; and
and the pressing mechanism is used for laminating the conductive film and the adhesive film positioned on the first side of the pole piece to form a first composite film, laminating the conductive film and the adhesive film on the second side to form a second composite film, and performing hot-pressing compounding on the first composite film, the pole piece and the second composite film to form a current collector.
10. The current collector production device as claimed in claim 9, wherein the press-fitting mechanism comprises a support roller and a hot-pressing unit; the supporting roller is positioned below the pole piece in the transmission direction and is used for laminating the conductive film and the adhesive film positioned on the second side of the pole piece to form a second composite film and supporting the pole piece and the second composite film to be transmitted to the hot pressing unit;
and the hot pressing unit is used for heating the first composite film, the pole piece and the second composite film to a target temperature and then pressing to form an initial current collector.
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| CN202111028346.9A CN113725396B (en) | 2021-09-02 | 2021-09-02 | Current collector production method and production device |
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|---|---|---|---|
| CN202111028346.9A CN113725396B (en) | 2021-09-02 | 2021-09-02 | Current collector production method and production device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207719319U (en) * | 2018-01-17 | 2018-08-10 | 宁德时代新能源科技股份有限公司 | Collector production equipment |
| JP2018190692A (en) * | 2017-05-11 | 2018-11-29 | 株式会社豊田自動織機 | Method of manufacturing lithium-doped negative electrode |
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| CN112824006A (en) * | 2019-11-21 | 2021-05-21 | 深圳市海瀚新能源技术有限公司 | Lug welding device and lug welding method |
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2021
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| JP2018190692A (en) * | 2017-05-11 | 2018-11-29 | 株式会社豊田自動織機 | Method of manufacturing lithium-doped negative electrode |
| CN207719319U (en) * | 2018-01-17 | 2018-08-10 | 宁德时代新能源科技股份有限公司 | Collector production equipment |
| CN111916751A (en) * | 2019-05-08 | 2020-11-10 | 上海其鸿新材料科技有限公司 | Lithium battery current collector, preparation method thereof and lithium battery |
| CN110277590A (en) * | 2019-06-28 | 2019-09-24 | 蜂巢能源科技有限公司 | Laminating method and battery core pole group manufacturing equipment for battery core manufacture |
| CN110911646A (en) * | 2019-10-25 | 2020-03-24 | 合肥国轩高科动力能源有限公司 | Composite current collector roll welding and die cutting integrated equipment and roll welding and die cutting method |
| CN112824006A (en) * | 2019-11-21 | 2021-05-21 | 深圳市海瀚新能源技术有限公司 | Lug welding device and lug welding method |
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