CN110534610A - Hull cell preparation facilities and preparation method - Google Patents

Abstract

In the technical field of thin film batteries of the present invention, a thin film battery preparation device is proposed. The thin film battery preparation device includes a coating machine and a grooving machine. The coating machine is suitable for forming each layer of material layers of a thin film battery by coating a roll-to-roll process; the grooving machine It is integrated in the winding end of the coating machine, and is used for scribing each layer of the material layer that needs scribing while winding up each layer of the material layer. The use of the thin film battery preparation device enables the thin film battery to complete scribing and interconnection during the coating process, thereby avoiding an additional surface electrode preparation process, further improving the production efficiency of the thin film battery and further reducing the manufacturing cost.

Description

Thin film battery manufacturing device and manufacturing method

technical field

The invention relates to the technical field of thin film batteries, in particular to a thin film battery preparation device and a thin film battery preparation method.

Background technique

Roll-to-roll is an efficient industrialized process for preparing thin-film batteries with flexible substrates. Thin-film batteries such as non-microcrystalline silicon, cadmium telluride, and copper indium gallium selenide are all formed by roll-to-roll process routes. Referring to the schematic structural view of the prior art thin-film battery shown in Figure 1; it is necessary to adopt an additional surface electrode preparation process on the transparent conductive layer of the thin-film battery to complete the battery interconnection, such as the traditional screen printing electrode interconnection, ICI (Integrated cell interconnect , integrated unit interconnection) electrode interconnection and so on. These additional interconnection processes are complex, time-consuming and material-consuming, which increases the manufacturing cost of thin-film batteries and weakens the industrial competitiveness of the roll-to-roll process.

Therefore, it is necessary to study a new thin-film battery preparation device and thin-film battery preparation method.

The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in the art to a person of ordinary skill in the art.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art of using an additional surface electrode preparation process to complete battery interconnection, and provide a thin film battery preparation device and a thin film battery preparation method that avoid the additional surface electrode preparation process.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

According to one aspect of the present disclosure, there is provided a thin film battery manufacturing device, comprising:

Coating machine, suitable for forming various material layers of thin-film batteries by coating in a roll-to-roll process;

The scribing machine is integrated at the winding end of the coating machine, and is used for scribing the material layers that need scribing while rewinding the material layers of each layer.

In an exemplary embodiment of the present disclosure, the scoring machine includes:

Grooving needle row, used for grooving the material layer of each layer;

The pressure applying mechanism is used for applying pressure to the grooved needle row.

In an exemplary embodiment of the present disclosure, the scoring machine further includes:

The pressure sensor is arranged between the grooved needle row and the pressure applying mechanism, and is used to detect the pressure applied by the pressure applying mechanism to the grooved needle row.

In an exemplary embodiment of the present disclosure, the scoring machine further includes:

The control unit is used to control the pressure applying mechanism to apply different pressures to the grooved needle row according to the different material layers, and adjust the pressure applied by the pressure applying mechanism to the grooved needle row according to the pressure value detected by the pressure sensor.

In an exemplary embodiment of the present disclosure, the grooved needle header includes:

a mounting plate having oppositely disposed first and second faces;

A plurality of scribing needles are arranged in a row on the first surface, and the distance between every two adjacent scribing needles is the same.

In an exemplary embodiment of the present disclosure, the width of each scribe needle is 20-50 μm; the distance between two adjacent scribe needles is 1 mm-10 mm.

According to one aspect of the present disclosure, there is provided a thin film battery manufacturing method, comprising:

Provide a flexible insulating substrate;

On the flexible insulating substrate, each layer of material layers of the thin-film battery is formed by coating with a roll-to-roll process; and

While rewinding the material layers of each layer, grooving is performed on each material layer that needs grooving.

In an exemplary embodiment of the present disclosure, the coating and grooving steps include:

coating to form a metal layer of the battery back electrode, and while winding the metal layer of the battery back electrode, scribing the metal layer of the battery back electrode;

Coating to form a photoelectric conversion functional layer, while rewinding the photoelectric conversion functional layer, grooving the photoelectric conversion functional layer;

The coated film forms a transparent conductive layer, and while the transparent conductive layer is rolled up, the transparent conductive layer is grooved.

In an exemplary embodiment of the present disclosure, the step of scribing the metal layer of the battery back electrode is to scribe a first groove on the metal layer of the battery back electrode, so that all the grooves at the first groove The flexible insulating substrate is exposed.

In an exemplary embodiment of the present disclosure, in the coating and scribing step of the photoelectric conversion functional layer, the photoelectric conversion functional layer extends into the first groove, and on the photoelectric conversion functional layer A second groove is drawn to expose the battery back electrode metal layer at the second groove.

In an exemplary embodiment of the present disclosure, in the coating and grooving step of the transparent conductive layer, the transparent conductive layer extends into the second groove, and the transparent conductive layer and the photoelectric A third groove is drawn on the conversion function layer, so that the battery back electrode metal layer at the third groove is exposed.

It can be seen from the above technical solution that the present invention has at least one of the following advantages and positive effects:

In the thin-film battery manufacturing device and the thin-film battery manufacturing method of the present invention, each material layer of the thin-film battery is formed by a coating machine, and the scribing machine is integrated at the winding end of the coating machine, and while winding the material layers of each layer, Use the grooving machine to scribe the layers of material that need grooving. On the one hand, it enables the battery to complete the slit interconnection during the coating process, thereby avoiding additional surface electrode preparation processes. On the other hand, it is not necessary to transfer it to the scribing station for scribing after each layer of film is formed, and then transfer it to the coating station for lower layer coating, which further improves the production efficiency and manufacturing cost of thin-film batteries. Further decrease. On the other hand, using the rotation of the coating machine during rewinding for scribing, there is no need to install additional rotators to drive the semi-finished thin film battery or the scribing machine to rotate, which makes the structure of the thin film battery manufacturing device simpler.

Description of drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

Fig. 1 is the structural representation of the thin-film battery of prior art;

Fig. 2 is a schematic structural view of an embodiment of the thin film battery manufacturing device of the present invention;

Fig. 3 is a schematic structural view of the slotting machine in Fig. 1;

4 is a schematic flow diagram of an embodiment of the thin film battery manufacturing method of the present invention;

Fig. 5 is a structural schematic diagram after forming a battery back electrode metal layer and scribing grooves on a flexible insulating substrate;

6 is a schematic structural view of forming a photoelectric conversion functional layer on the metal layer of the back electrode of the battery;

7 is a schematic structural view of forming a second groove on the photoelectric conversion functional layer;

Fig. 8 is a structural schematic diagram of forming a transparent conductive layer on the photoelectric conversion functional layer;

FIG. 9 is a schematic structural view of forming a third groove on the transparent conductive layer and the photoelectric conversion functional layer.

The reference signs of the main components in the figure are explained as follows:

1. Rewinding roller;

2. Grooving pin row; 21. Mounting plate; 22. Needle marking;

3. Drive board;

4. Flexible insulating substrate;

5. The metal layer of the battery back electrode; 51. The first groove;

6. The photoelectric conversion functional layer; 61. The second groove;

7. Transparent conductive layer; 71. The third groove;

8. Pressure sensor.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many 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 same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

This exemplary embodiment firstly provides a thin film battery manufacturing device, refer to the schematic structural diagram of an embodiment of the thin film battery manufacturing device shown in FIG. 2 ; The coating machine can be adapted to form various layers of material layers of thin-film batteries by coating in a roll-to-roll process; the scribing machine is integrated at the winding end of the coating machine, and can be used to slit the required material layers while winding each layer of material layers. Each layer of the material layer is scribed.

In this exemplary embodiment, the coating machine may be a roll-to-roll coating machine, and the roll-to-roll coating machine may include a coating roll, a winding roll 1 , an unwinding roll, and the like.

In this exemplary embodiment, the scribing machine can be arranged above the coating machine, specifically above the winding roll 1, and the central axes of the scribing machine and the winding roll 1 can be arranged in parallel, so that the scribing machine can When the winding roller 1 rotates, the material layer on the winding roller 1 is grooved. It is not necessary to transfer it to the grooving station for grooving after each layer of film is formed, and then transfer it to the coating station for coating, which can save the semi-finished product transfer process in the thin film battery manufacturing process, thereby saving manpower Material resources, and improve production efficiency. The notching machine can be set at the initial winding position of the winding roller 1, so that the material layer can be notched at the initial position of the material layer. Utilizing the rotation of the winding roller 1, there is no need to set an additional rotator to drive the semi-finished product of the thin film battery or the slotting machine to rotate, so that the structure of the thin film battery preparation device is simpler. Certainly, the scribing machine can also be arranged on the left side, the right side or the bottom of the coating machine.

Referring to the schematic structural diagram of the scribing machine shown in FIG. 3 ; the scribing machine may include a scribing needle row 2 and a pressing mechanism and the like. The scribing needle row 2 can be used for scribing each material layer; the pressure applying mechanism can be used for applying pressure to the scribing needle row 2 .

In this exemplary embodiment, the pressing mechanism may include a drive unit (not shown in the figure), the drive end of the drive unit may be provided with a drive plate 3, the drive plate 3 may be connected with the scribing needle header 2, and the drive plate 3 may It can make the stress of the scribed pin header 2 uniform, and make the depths of the scribed grooves uniform. The driving unit can drive the driving plate 3 to move and apply pressure to the driving plate 3 . The driving unit can be a linear motor, an electric cylinder, an oil cylinder, an air cylinder, and the like.

In this example embodiment, the scribe pin header 2 may include a mounting plate 21 and a plurality of scribe pins 22 disposed on the mounting plate 21 and the like. Specifically, the mounting plate 21 is provided in a rectangular plate shape, and the mounting plate 21 has a first surface and a second surface disposed opposite to each other. A plurality of scribe needles 22 are arranged side by side in a row, and are arranged on the first surface of the installation board 21 . The distance between every two adjacent scribe needles 22 is the same. The second surface of the mounting board 21 is connected to the driving board 3 .

In this exemplary embodiment, the stylus 22 is arranged to have an isosceles triangular plate shape in a cross-section perpendicular to the mounting plate 21. Therefore, the scribing needle 22 has a base and two waists, and one side of the base is connected to the mounting plate. 21 is fixedly connected, and the top corner of the marking needle 22 can be scratched. Of course, those skilled in the art can understand that the structure of the stylus 22 is not limited to the above description, for example, the stylus 22 can also be set as a strip-shaped plate, and a triangular-shaped sharpening point is provided at the bottom of the strip-shaped plate; The stylus 22 can also be set in a conical shape, or a cylindrical shape and a conical sharpening point can be provided on the top of the cylinder. The width of each scribing needle 22 is about 20-50 μm, specifically, the width of the tip of the scribing needle 22 is about 20-50 μm; the distance between two adjacent scribing needles 22 is about 1 mm-10 mm.

In this example embodiment, a plurality of pressure sensors 8 may also be arranged between the scribing needle header 2 and the pressing mechanism, specifically, the pressure sensors 8 may be arranged between the mounting board 21 and the driving board 3 . The pressure sensor 8 can be used to detect the pressure exerted by the pressure applying mechanism on the scribing needle header 2 . The pressure sensor 8 can be a capacitive pressure sensor, a variable reluctance pressure sensor (variable reluctance sensor, differential transformer pressure sensor), a Hall pressure sensor, an optical fiber pressure sensor, a resonant pressure sensor and the like. Of course, one pressure sensor 8 can also be provided.

The scribing machine can also include a control unit, which can be used to apply different pressures to the scribing row needle 2 according to different control pressure mechanisms of material layers, and to adjust the pressure applying mechanism to the scribing row according to the pressure detected by the pressure sensor 8. Pressure applied by needle 2.

In this exemplary embodiment, since the material layers of the thin film battery are formed in sequence, and the order is fixed, and the thickness of each material layer of the same type of product is the same. Therefore, it is possible to set in the control unit how much pressure the pressure applying mechanism needs to apply to the scribing needle row 2 for the first time, how much pressure is applied for the second time, and how much pressure is applied for the third time. In this way, set the pressure value applied each time in turn. The control unit controls the pressure that the press needs to apply according to the grooving sequence.

The pressure sensor 8 is connected to the signal input end of the control unit, and the signal output end of the control unit is connected to the control end of the drive unit. The set pressure value that needs to be applied to the scribing needle header 2 when scribing each material layer is stored in the control unit. After the press machine applies pressure to the grooved needle header 2, the pressure sensor 8 will detect the pressure value applied by the pressure machine to the grooved needle header 2, and the pressure value is the detected pressure value. The control unit compares the set pressure value with the detection pressure value. When the set pressure value is greater than the detection pressure value, the control unit controls the press machine to increase the pressure applied to the groove needle row 2; when the set pressure value is lower than the detection pressure value value, the control unit controls the press machine to reduce the pressure applied to the grooved needle header 2. The closed-loop control can be realized through the pressure sensor 8 and the control unit, and the control accuracy can be improved, so that the depth of the scribing can be consistent, and the consistency and pass rate of products can be improved.

Further, this exemplary embodiment also provides a method for preparing a thin film battery. Referring to FIG. 4 , a schematic flow diagram of an embodiment of the method for preparing a thin film battery of the present invention is shown; the method for preparing a thin film battery may include the following steps:

Step S10, providing a flexible insulating substrate.

Step S20 , on the flexible insulating substrate, each material layer of the thin-film battery is formed by coating in a roll-to-roll process.

In step S30 , while rewinding the material layers of each layer, scribing is performed on each material layer that needs scribing.

Referring to the structures shown in Figures 5 to 9, the above coating and grooving steps may include:

The plating film forms the metal layer of the battery back electrode, and the metal layer 5 of the battery back electrode is scribed while winding up the battery back electrode metal layer 5 .

The photoelectric conversion functional layer is formed by coating, and the photoelectric conversion functional layer 6 is scribed while winding the photoelectric conversion functional layer 6 .

The coating forms a transparent conductive layer, and the transparent conductive layer 7 is grooved while winding the transparent conductive layer 7 .

The above-mentioned coating and grooving steps will be described in detail below.

The plating film forms the metal layer of the battery back electrode, and the metal layer 5 of the battery back electrode is scribed while winding up the battery back electrode metal layer 5 .

In this example embodiment, first, a flexible insulating substrate 4 is formed; the flexible insulating substrate 4 may be a PI (polyimide) substrate, a stainless steel substrate with a silicon nitride coating, and the like. A battery back electrode metal layer 5 is formed on the flexible insulating substrate 4, and the battery back electrode metal layer 5 may be a Mo metal layer, a Cu metal layer, a silver metal layer, and the like. Then, while the battery back electrode metal layer 5 is being wound up by the winding roller 1, the first groove 51 is drawn on the battery back electrode metal layer 5 by a slotting machine, so that the flexibility at the first groove 51 is The insulating substrate 4 is exposed, that is, the depth of the first groove 51 is greater than or equal to the thickness of the battery back electrode metal layer 5 .

Referring to FIG. 5 , it is a schematic diagram showing the formation of the battery back electrode metal layer 5 on the flexible insulating substrate 4 . The photoelectric conversion functional layer is formed by coating, and the photoelectric conversion functional layer 6 is scribed while winding the photoelectric conversion functional layer 6 .

Referring to FIG. 6 , it is a schematic structural diagram of forming a photoelectric conversion functional layer 6 on the battery back electrode metal layer 5 . A photoelectric conversion functional layer 6 is formed on the back electrode metal layer 5 of the battery. The photoelectric conversion functional layer 6 can be an amorphous silicon thin film p-n junction functional layer, a copper indium gallium selenide heterojunction functional layer, or a cadmium telluride heterojunction functional layer. layer, gallium arsenide p-n junction functional layer, perovskite/electron hole transport functional layer, etc. The photoelectric conversion functional layer 6 extends into the first groove 51 , so that the photoelectric conversion functional layer 6 is connected to the flexible insulating substrate 4 .

Referring to the schematic diagram of the structure of forming the second groove 61 on the photoelectric conversion functional layer 6 shown in FIG. 6, and expose the battery back electrode metal layer 5 at the second groove 61, that is, the depth of the second groove 61 is greater than or equal to the thickness of the photoelectric conversion functional layer 6. The second groove 61 is arranged parallel to the first groove 51 . The second groove 61 and the first groove 51 can be adjacently arranged, and the extension line of the groove wall near the second groove 61 of the first groove 51 and the groove wall of the second groove 61 near the first groove 51 May or may not overlap.

The coating forms a transparent conductive layer, and the transparent conductive layer 7 is grooved while winding the transparent conductive layer 7 .

With reference to the schematic structural view of forming a transparent conductive layer 7 on the photoelectric conversion functional layer 6 shown in Figure 8, a transparent conductive layer 7 is formed on the photoelectric conversion functional layer 6, the transparent conductive layer 7 can be a transparent conductive zinc oxide layer, transparent Conductive indium oxide layer, transparent conductive graphene layer, etc. The transparent conductive layer 7 protrudes into the second groove 61 to connect the transparent conductive layer 7 with the metal layer 5 of the battery back electrode.

Referring to the schematic diagram of the structure of the third groove 71 formed on the transparent conductive layer 7 and the photoelectric conversion functional layer 6 shown in FIG. A third groove 71 is drawn on the transparent conductive layer 7 and the photoelectric conversion functional layer 6, and the battery back electrode metal layer 5 at the third groove 71 is exposed, that is, the depth value of the third groove 71 is greater than or equal to The sum of the thickness values of the transparent conductive layer 7 and the photoelectric conversion functional layer 6 . The third groove 71 is arranged parallel to the second groove 61 . The third groove 71 may be disposed adjacent to the second groove 61 . The groove wall of the third groove 71 close to the second groove 61 and the groove wall of the second groove 61 close to the third groove 71 may or may not overlap. Electrode leads may be disposed within the third groove 71 . Of course, in other exemplary embodiments of the present invention, the third groove 71 may not be formed on the photoelectric conversion functional layer 6 , and the third groove 71 may only be formed on the transparent conductive layer 7 .

The features, structures or characteristics described above may be combined in any suitable manner in one or more embodiments and, where possible, the features discussed in the various embodiments are interchangeable. In the foregoing description, numerous specific details were provided in order to give a thorough understanding of embodiments of the invention. Those skilled in the art will appreciate, however, that the technical solutions of the present invention may be practiced without one or more of the specific details, or that other methods, components, materials, etc. may be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

The terms "about" and "approximately" used in this specification generally mean within 20%, preferably within 10%, and more preferably within 5% of a given value or range. The given quantity here is an approximate quantity, which means that the meanings of "about", "approximately", "approximately" and "approximately" can still be implied without specific instructions.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, for example, according to the description in the accompanying drawings directions for the example described above. It will be appreciated that if the illustrated device is turned over so that it is upside down, then elements described as being "upper" will become elements that are "lower". When a structure is "on" another structure, it may mean that a structure is integrally formed on another structure, or that a structure is "directly" placed on another structure, or that a structure is "indirectly" placed on another structure through another structure. other structures.

In this specification, the terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising", "including" and "Having" is used to indicate an open-ended inclusive meaning and means that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first", "second " and "Third" etc. are used only as marks, not as restrictions on the number of their objects.

It should be understood that the invention is not limited in its application to the detailed construction and arrangement of components set forth in this specification. The invention is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications fall within the scope of the present invention. It shall be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute alternative aspects of the invention. The embodiments described in this specification illustrate the best modes known for carrying out the invention and will enable others skilled in the art to utilize the invention.

Claims (11)

1. a kind of hull cell preparation facilities characterized by comprising

Coating machine, suitable for forming the layers of material layer of hull cell with roll-to-roll process plated film；

Paddle-tumble machine is integrated in the winding end of the coating machine, for being drawn while the winding of each layer material layer to needs Each layer of slot material layer carries out paddle-tumble.

2. hull cell preparation facilities according to claim 1, which is characterized in that the paddle-tumble machine includes:

Paddle-tumble arranges needle, for carrying out paddle-tumble each layer material layer；

Pressure exerting arrangement, for giving paddle-tumble row's needle pressure.

3. hull cell preparation facilities according to claim 2, which is characterized in that the paddle-tumble machine further include:

Pressure sensor is set between paddle-tumble row's needle and the pressure exerting arrangement, for detecting the pressure exerting arrangement to described Paddle-tumble arranges the pressure value that needle applies.

4. hull cell preparation facilities according to claim 3, which is characterized in that the paddle-tumble machine further include:

Control unit, for applying different pressure to paddle-tumble row's needle according to the different control pressure exerting arrangements of the material layer, with And the pressure that pressure exerting arrangement applies to paddle-tumble row's needle is adjusted according to the pressure value of pressure sensor detection.

5. hull cell preparation facilities according to claim 2, which is characterized in that paddle-tumble arranges needle and includes:

Mounting plate has the first face and the second face being oppositely arranged；

It is identical to be listed as spacing of the row between first face, each adjacent two scriber for multiple scribers.

6. hull cell preparation facilities according to claim 5, which is characterized in that the width of each scriber is 20~50 μ m；Spacing between two neighboring scriber is 1mm~10mm.

7. a kind of hull cell preparation method, comprising:

Flexible insulating substrate is provided；

On the flexible insulating substrate, the layers of material layer of hull cell is formed with roll-to-roll process plated film；And

While the winding of each layer material layer, needing each layer of paddle-tumble material layer to carry out paddle-tumble.

8. hull cell preparation method according to claim 7, which is characterized in that the plated film and paddle-tumble step, comprising:

Plated film forms battery back electrode metal layer, while winding to the battery back electrode metal layer, to the electricity Pond back electrode metal layer carries out paddle-tumble；

Plated film forms photoelectric converting function layer, while winding to the photoelectric converting function layer, turns to the photoelectricity It changes functional layer and carries out paddle-tumble；

Plated film forms transparency conducting layer, while winding to the transparency conducting layer, carries out to the transparency conducting layer Paddle-tumble.

9. hull cell preparation method according to claim 8, which is characterized in that the battery back electrode metal layer is drawn Slot step marks the first groove on the battery back electrode metal layer, serves as a contrast the flexible insulation of first groove Bottom exposure.

10. hull cell preparation method according to claim 9, which is characterized in that the plating of the photoelectric converting function layer Film paddle-tumble step protrudes into the photoelectric converting function layer in first groove, and draws on the photoelectric converting function layer Second groove out makes the battery back electrode metal layer exposure of second groove.

11. hull cell preparation method according to claim 10, which is characterized in that the plated film of the transparency conducting layer is drawn Slot step protrudes into the transparency conducting layer in second groove, and in the transparency conducting layer and the photoelectric conversion Third groove is marked in functional layer, makes the battery back electrode metal layer exposure of the third groove.