Preparation structure of pole piece of solid-state battery

Abstract

The utility model discloses a preparation structure of a pole piece of a solid-state battery, which relates to the technical field of battery pole piece preparation, and comprises a feeding part, a winding part, a compaction roller mechanism, a heating area, an edge cutting mechanism and a thickness roller mechanism, the compaction roller mechanism is arranged between the feeding part and the winding part, and the thickness roller mechanism is arranged between the heating area and the compaction roller mechanism. The heating area and the thickness roller mechanism are arranged between the compaction roller mechanism and the winding part, and the trimming mechanism is arranged between the heating area and the winding part. Through the arrangement of the compaction roller mechanism, the heating area and the thickness roller mechanism, the calendered pole piece and the supporting material can be compounded together to form the pole piece, the arrangement of a solvent can be cancelled, and the pole piece with controllable thickness and width can be obtained at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pole piece preparation, in particular to a preparation structure of a pole piece of a solid-state battery. Background Art

[0002] Solid-state batteries are mainly composed of positive and negative electrodes and solid electrolytes. Compared with traditional liquid lithium-ion batteries, they reduce the injection process in the preparation process and reduce the use of diaphragms and liquid solvents in raw materials.

[0003] The unique performance of solid-state batteries, especially their excellent safety performance, has attracted widespread attention. The preparation of solid-state battery pole pieces is quite different from that of traditional pole pieces. In the traditional pole piece preparation process, solvents are used for wet coating and then the solvents are dried. However, the wet coating manufacturing method is prone to solvent leakage during the preparation process, which is not easy to recover. Utility Model Content

[0004] The purpose of the utility model is to provide a preparation structure of a pole piece of a solid-state battery, so as to solve the above-mentioned technical problems.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A preparation structure for a pole piece of a solid-state battery comprises a feeding portion, a winding portion, a compacting roller mechanism, a heating zone, a trimming mechanism and a thickness rolling mechanism, wherein the compacting roller mechanism is arranged between the feeding portion and the winding portion, the heating zone and the thickness rolling mechanism are arranged between the compacting roller mechanism and the winding portion, and the trimming mechanism is arranged between the heating zone and the winding portion.

[0007] Preferably, the feeding part comprises a first feeding part and a second feeding part, the first feeding part is arranged between the two second feeding parts, and the first feeding part is used to provide supporting materials, and the two second feeding parts are used to provide rolled pole sheets.

[0008] As a further preference, an adhesive is provided between the rolled electrode sheet and the supporting material.

[0009] Preferably, the compacting roller mechanism comprises two compacting rollers arranged side by side, with a first gap between the two compacting rollers.

[0010] As a further preference, the heating zone includes a first heating zone and a second heating zone, the thickness roller mechanism includes a first thickness roller mechanism and a second thickness roller mechanism, the first thickness roller mechanism is arranged between the first heating zone and the second heating zone, and the second thickness roller mechanism is arranged between the second heating zone and the trimming mechanism.

[0011] As a further preference, the first thickness roller mechanism comprises two first rollers arranged side by side, a second gap is provided between the two first rollers, and a width of the second gap is smaller than a width of the first gap.

[0012] As a further preference, the second thickness roller mechanism comprises two second rollers, a third gap is defined between the two second rollers, and a width of the third gap is smaller than a width of the second gap.

[0013] As a further preference, it further includes a guide roller, and the guide roller is provided between the compaction roller mechanism and the first heating zone.

[0014] As a further preference, the trimming mechanism comprises a cutting knife, and the cutting knife is used to cut both side edges of the pole piece.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] In the utility model, by setting the compaction roller mechanism, the heating zone and the thickness roller mechanism, the rolled pole piece and the supporting material can be compounded together to form the pole piece, the setting of the solvent can be eliminated, and the pole piece with controllable thickness and width can be obtained at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the preparation structure of the pole piece of the solid-state battery in the utility model.

[0018] In the figure: 1. First feeding section; 2. Second feeding section; 3. Winding section; 4. Compacting roller mechanism; 5. Trimming mechanism; 6. Compacting roller; 7. First heating zone; 8. Second heating zone; 9. First thickness roller mechanism; 10. Second thickness roller mechanism; 11. First roller; 12. Second roller; 13. Guide roller; 14. Cutting knife. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Figure 1 This is a schematic diagram of the structure of the preparation structure of the pole piece of the solid-state battery in the utility model, please refer to Figure 1 As shown, a preferred embodiment is shown, which shows a preparation structure of a solid-state battery electrode sheet, including a feeding part, a winding part 3, a compacting roller mechanism 4, a heating zone, a trimming mechanism 5 and a thickness rolling mechanism. A compacting roller mechanism 4 is provided between the feeding part and the winding part 3, a heating zone and a thickness rolling mechanism are provided between the compacting roller mechanism 4 and the winding part 3, and a trimming mechanism 5 is provided between the heating zone and the winding part 3. In this embodiment, see Figure 1 As shown, the feeding section is used to provide support materials and rolled pole sheets on both sides of the support materials. The winding section 3 is used to collect the formed pole sheets, and the compacting roller mechanism 4 is used to extrude and compound the rolled pole sheets on the support materials. The heating zone is used to heat the rolled pole sheets and the support materials, which is convenient for the subsequent thickness roller mechanism to extrude and control the thickness of the pole sheets, and also convenient for the trimming mechanism 5 to cut the two sides of the pole sheets, so as to obtain pole sheets of specified thickness and specified width, and finally wound and stored by the winding section 3. Among them, the rolled pole sheets are positive rolled pole sheets or negative rolled pole sheets, and the rolled pole sheets can be conventional rolled pole sheets in the field, which can generally be rolled into rolls by conductive agents, adhesives and positive / negative active materials, and the support material can be foil. The polarity of the rolled pole sheets provided by the first feeding section 1 and the second feeding section 2 is the same. In other embodiments, the polarities of the rolled electrode sheets provided by the first loading part 1 and the second loading part 2 may be different, and the first loading part 1 and the second loading part 2 cannot work at the same time.

[0023] In this embodiment, by setting up the feeding part, the winding part 3, the compacting roller mechanism 4, the heating zone, the trimming mechanism 5 and the thickness roller mechanism, a dry coating method is adopted, which can avoid the use of liquid solvents and realize mass production of electrodes.

[0024] When in use, the winding part 3 rotates to wind the electrode sheet on the winding part 3, and at the same time provides power for the movement of the electrode sheet, driving the supporting material and the rolled electrode sheet forward. At the same time, the compacting roller mechanism 4 extrude the rolled electrode sheet, and composites the rolled electrode sheet on the supporting material, and then heats it through the heating zone. The supporting material and the rolled electrode sheet are extruded by the thickness rolling roller mechanism to form the electrode sheet, and the thickness of the electrode sheet can be controlled. Then, the two sides of the electrode sheet are cut by the trimming mechanism 5 to facilitate the control of the width of the electrode sheet.

[0025] Further, as a preferred embodiment, the feeding part includes a first feeding part 1 and a second feeding part 2, the first feeding part 1 is arranged between the two second feeding parts 2, and the first feeding part 1 is used to provide support materials, wherein the first and second feeding parts 2 and 2 are used to provide rolled pole pieces. Figure 1 As shown, the two second feeding parts 2 are located on both sides of the first feeding part 1 , the first feeding part 1 is wound with supporting material, and the two second feeding parts 2 are wound with rolled pole sheets.

[0026] In this embodiment, the first feeding part 1 and the second feeding part 2 may both include a feeding roller, which is movably mounted on a roller bracket and rotatable, and the supporting material and the calendered electrode sheet are both wound around the corresponding feeding roller.

[0027] The winding part 3 may include a winding drum and a bracket for installing the winding drum. A motor is provided on one side of the bracket for driving the winding drum to rotate. The rotation of the winding drum can wind the pole piece and provide power for the movement of the pole piece.

[0028] Further, as a preferred embodiment, the compacting roller mechanism 4 includes two compacting rollers 6 arranged side by side, and there is a first gap between the two compacting rollers 6. Among them, the compacting roller mechanism 4 also includes a first motor and a first bracket, and the two compacting rollers 6 are arranged on the first bracket. The first motor is arranged on the side of the first bracket, and the first motor can be connected to one of the compacting rollers 6 through a gear assembly. The compacting roller 6 can be driven to rotate by the first motor, so that the calendered pole piece is pressed and compounded on the supporting material. In other embodiments, the compacting roller mechanism 4 may only include a bracket and two compacting rollers 6 arranged on the bracket, and the movement of the pole piece can be powered by the winding part 3.

[0029] Wherein, an adhesive is provided between the rolled pole piece and the supporting material. When the rolled pole piece passes through the compacting roller 6, under the pressure of the compacting roller 6, the rolled pole piece can be fixed on the supporting material through the adhesive.

[0030] Further, as a preferred embodiment, the heating zone includes a first heating zone 7 and a second heating zone 8, the thickness roller mechanism includes a first thickness roller mechanism 9 and a second thickness roller mechanism 10, the first thickness roller mechanism 9 is provided between the first heating zone 7 and the second heating zone 8, and the second thickness roller mechanism 10 is provided between the second heating zone 8 and the trimming mechanism 5. The first heating zone 7 and the second heating zone 8 may both include a heater, the heater includes a box body and two rows of heating rollers provided inside the box body, and the two rows of heating rollers are distributed up and down, and the calendered pole piece and the supporting material pass through between the two rows of heating rollers to achieve heating of the calendered pole piece and the supporting material, so that the first thickness roller mechanism 9 and the second thickness roller mechanism 10 extrude the calendered pole piece and the supporting material, thereby making the thickness of the pole piece controllable.

[0031] In other embodiments, the first heating zone 7 and the second heating zone 8 may also be other structures as long as the rolled electrode sheet and the supporting material can be heated.

[0032] Further, as a preferred embodiment, the first thickness roller mechanism 9 includes two first rollers 11 arranged side by side, and a second gap is provided between the two first rollers 11, and the width of the second gap is smaller than the width of the first gap. The first thickness roller mechanism 9 in this embodiment also includes a roller support for mounting the first roller 11, and the first roller 11 is rotatable, and the size of the second gap between the two first rollers 11 can be adjusted as needed to control the thickness of the electrode sheet.

[0033] Further, as a preferred embodiment, the second thickness roller mechanism 10 includes two second rollers 12, and a third gap is provided between the two second rollers 12, and the width of the third gap is smaller than the width of the second gap. The second thickness roller mechanism 10 also includes a roller support for mounting the second rollers 12, and the size of the third gap between the two second rollers 12 can be adjusted as needed to control the thickness of the electrode sheet. By setting the first thickness roller mechanism 9 and the second thickness roller mechanism 10, it is possible to achieve double extrusion of the rolled electrode sheet and the supporting material, so that the thickness of the electrode sheet is more precise.

[0034] Further, as a preferred embodiment, it also includes a guide roller 13, and a guide roller 13 is provided between the compacting roller mechanism 4 and the first heating zone 7. The guide roller 13 can be installed between the compacting roller 6 and the first heating zone 7 through an external bracket to change the moving direction of the calendered electrode sheet and the supporting material.

[0035] Further, as a preferred embodiment, the trimming mechanism 5 includes a cutting knife 14, which is used to cut the two side edges of the pole piece. In this embodiment, two cutting knives 14 are provided, which are located on both sides of the pole piece and on the moving path of the pole piece. The spacing between the two cutting knives 14 can be preset. When the pole piece passes through the cutting knife 14, the cutting knife 14 can cut the side edge of the pole piece to achieve control of the width of the pole piece.

[0036] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A preparation structure of a pole piece of a solid-state battery, characterized in that: It includes a feeding part, a winding part, a compacting roller mechanism, a heating zone, a trimming mechanism and a thickness roller mechanism. The compacting roller mechanism is arranged between the feeding part and the winding part, the heating zone and the thickness roller mechanism are arranged between the compacting roller mechanism and the winding part, and the trimming mechanism is arranged between the heating zone and the winding part.

2. The preparation structure of the pole piece of the solid-state battery according to claim 1, characterized in that: The feeding part includes a first feeding part and a second feeding part, wherein the first feeding part is arranged between the two second feeding parts, and the first feeding part is used to provide supporting materials, and the two second feeding parts are used to provide rolled pole sheets.

3. The preparation structure of the pole piece of the solid-state battery according to claim 2, characterized in that: An adhesive is provided between the rolled pole piece and the supporting material.

4. The preparation structure of the pole piece of the solid-state battery according to claim 1, characterized in that: The compacting roller mechanism comprises two compacting rollers arranged side by side, and a first gap is formed between the two compacting rollers.

5. The preparation structure of the pole piece of the solid-state battery according to claim 4, characterized in that: The heating zone includes a first heating zone and a second heating zone, the thickness roller mechanism includes a first thickness roller mechanism and a second thickness roller mechanism, the first thickness roller mechanism is arranged between the first heating zone and the second heating zone, and the second thickness roller mechanism is arranged between the second heating zone and the trimming mechanism.

6. The preparation structure of the pole piece of the solid-state battery according to claim 5, characterized in that: The first thickness roller mechanism comprises two first rollers arranged side by side, a second gap is provided between the two first rollers, and a width of the second gap is smaller than a width of the first gap.

7. The preparation structure of the pole piece of the solid-state battery according to claim 6, characterized in that: The second thickness roller mechanism includes two second rollers, a third gap is defined between the two second rollers, and a width of the third gap is smaller than a width of the second gap.

8. The preparation structure of the pole piece of the solid-state battery according to claim 5, characterized in that: It also includes a guide roller, which is arranged between the compacting roller mechanism and the first heating zone.

9. The preparation structure of the pole piece of the solid-state battery according to claim 1, characterized in that: The trimming mechanism comprises a cutting knife, and the cutting knife is used to cut the two side edges of the pole piece.

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