Battery pole piece preparation device

Abstract

The utility model relates to the technical field of battery pole pieces, and particularly provides a battery pole piece preparation device. The problem that an existing electrode is high in manufacturing cost is solved. In order to achieve the purpose, the battery pole piece preparation device provided by the utility model comprises a coating mechanism, a drying mechanism and a film forming mechanism, wherein the coating mechanism is used for coating carbon on two sides of the current collector; the drying mechanism is arranged at the downstream of the coating mechanism and is used for drying the carbon-coated current collector; and the film forming mechanism is arranged at the downstream of the drying mechanism and is used for distributing electrode materials on two sides of the current collector and forming a film so as to obtain the battery pole piece. The coating mechanism for carbon coating and the film forming mechanism are integrated, carbon coating and film forming work can be completed at a time, intermediate transfer, storage and the like are not needed, energy consumption, needed space and manpower for battery pole piece production can be saved, and then the production cost of the battery pole piece is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery electrode sheets, and particularly provides a device for preparing battery electrode sheets. Background Art

[0002] In the production process of lithium battery electrodes, it is often necessary to add a layer of carbon coating on the current collector to achieve the purpose of reducing the internal resistance of the battery, improving the adhesion between the active material and the current collector, extending the service life of the battery and reducing costs.

[0003] At present, most production lines use finished carbon-coated current collectors for production. Since the price of carbon-coated current collectors is much higher than that of non-carbon-coated current collectors, the production cost of electrodes will be greatly increased.

[0004] To solve the above technical problems, existing lithium battery manufacturers are equipped with carbon-coated current collector production lines. However, the production lines are all equipped with separate workshops for production, and intermediate storage and transportation are required when producing electrodes, which will also increase the energy and personnel consumption in production, resulting in a relatively high manufacturing cost of electrodes.

[0005] Therefore, there is an urgent need for a device for preparing battery electrode sheets to solve the above technical problems. Summary of the Utility Model

[0006] The utility model aims to solve the above technical problems, that is, to solve the problem of relatively high existing electrode manufacturing costs.

[0007] In a first aspect, the utility model provides a device for preparing battery electrode sheets, which includes:

[0008] A coating mechanism for coating carbon on both sides of the current collector;

[0009] A drying mechanism arranged downstream of the coating mechanism for drying the carbon-coated current collector;

[0010] A film-forming mechanism arranged downstream of the drying mechanism for laying electrode materials on both sides of the current collector and forming a film to obtain a battery electrode sheet.

[0011] In a specific embodiment of the above device for preparing battery electrode sheets, the coating mechanism includes two first coating heads respectively arranged on both sides of the current collector for coating carbon on both sides of the current collector.

[0012] In a specific embodiment of the above device for preparing battery electrode sheets, the film-forming mechanism includes a second coating head and a first drying component. The second coating head is used for coating electrode slurry on a first side of the current collector, and the first drying component is located downstream of the second coating head for drying the current collector coated with electrode slurry; and / or

[0013] The film forming mechanism includes a third coating head and a second drying assembly. The third coating head is located downstream of the first drying assembly and is used to coat electrode paste on the second side of the current collector. The second drying assembly is located downstream of the third coating head and is used to dry the current collector coated with electrode paste.

[0014] In a specific embodiment of the above battery electrode sheet preparation device, the first drying assembly is integrated on the drying mechanism; and / or

[0015] The second drying assembly is integrated on the drying mechanism.

[0016] In a specific embodiment of the above battery electrode sheet preparation device, the drying mechanism includes a box body and a plurality of blowing nozzles arranged in the box body. The blowing nozzles are used to blow hot air to the current collector to dry the current collector.

[0017] In a specific embodiment of the above battery electrode sheet preparation device, the film forming mechanism includes:

[0018] A first thermal composite assembly, which is arranged on the first side of the current collector. The first thermal composite assembly is used to thermally composite the current collector and the first battery film on the first side of the current collector; and / or

[0019] A second thermal composite assembly, which is arranged on the second side of the current collector. The second thermal composite assembly is used to thermally composite the current collector and the second battery film on the second side of the current collector.

[0020] In a specific embodiment of the above battery electrode sheet preparation device, the film forming mechanism further includes:

[0021] A first film forming assembly, which is arranged between the first thermal composite assembly and the drying mechanism. The first film forming assembly performs hot roll pressing on the electrode material to form a first battery film; and / or

[0022] A second film forming assembly, which is arranged between the second thermal composite assembly and the drying mechanism. The second film forming assembly performs hot roll pressing on the electrode material to form a second battery film; or

[0023] The film forming mechanism further includes:

[0024] A first unwinding assembly, which is arranged upstream of the first thermal composite assembly and is used to unwind the first battery film; and / or

[0025] A second unwinding assembly, which is arranged upstream of the second thermal composite assembly and is used to unwind the second battery film.

[0026] In the specific embodiment of the above battery electrode sheet preparation device, the battery electrode sheet preparation device further includes a corona mechanism, which is arranged upstream of the coating mechanism and is used for corona treatment of the current collector.

[0027] In the specific embodiment of the above battery electrode sheet preparation device, the battery electrode sheet preparation device further includes:

[0028] An unwinding mechanism, which is arranged upstream of the corona mechanism and is used for unwinding the current collector; and / or

[0029] A winding mechanism, which is arranged downstream of the film forming mechanism and is used for winding the battery electrode sheet.

[0030] In the specific embodiment of the above battery electrode sheet preparation device, the battery electrode sheet preparation device further includes an auxiliary roller;

[0031] The auxiliary roller is arranged between the unwinding mechanism and the corona mechanism; and / or

[0032] The auxiliary roller is arranged between the corona mechanism and the coating mechanism; and / or

[0033] The auxiliary roller is arranged between the drying mechanism and the film forming mechanism; and / or

[0034] The auxiliary roller is arranged between the film forming mechanism and the winding mechanism.

[0035] In the case of adopting the above technical solution, the battery electrode sheet preparation device of the present invention includes a coating mechanism, a drying mechanism and a film forming mechanism; wherein the coating mechanism is used for coating carbon on both sides of the current collector; the drying mechanism is arranged downstream of the coating mechanism and is used for drying the current collector coated with carbon; the film forming mechanism is arranged downstream of the drying mechanism and is used for arranging electrode materials on both sides of the current collector and forming a film to obtain a battery electrode sheet. Integrating the carbon coating mechanism and the film forming mechanism can complete the work of carbon coating and film forming at one time, without intermediate transfer and storage, etc., which can save the energy consumption, required space and manpower for the production of battery electrode sheets, and thus reduce the production cost of battery electrode sheets. Description of the Drawings

[0036] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings, in which:

[0037] Figure 1 is a schematic structural diagram of the battery electrode sheet preparation device provided in Embodiment 1 of the present invention;

[0038] Figure 2 is a schematic structural diagram of the battery electrode sheet preparation device provided in Embodiment 2 of the present invention;

[0039] Figure 3It is a schematic structural diagram of the battery electrode sheet preparation device provided in the third embodiment of the present utility model.

[0040] List of reference numerals:

[0041] 1. Unwinding mechanism; 2. Corona mechanism; 3. Coating mechanism; 4. Drying mechanism; 41. First drying part; 42. Second drying part; 43. Third drying part; 44. Blowing nozzle; 51. First coating mechanism; 52. Second coating mechanism; 53. First film-forming assembly; 531. Feeding mechanism; 532. Film-forming assembly; 533. Thinning assembly; 54. First thermal composite assembly; 55. Second film-forming assembly; 56. Second thermal composite assembly; 57. First unwinding assembly; 58. Second unwinding assembly; 6. Rewinding mechanism; 7. Auxiliary roller. Detailed implementation manners

[0042] The following describes the preferred implementation manners of the present utility model with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0043] It should be noted that in the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0044] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set" and "connect" 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 directly connected, or indirectly connected through an intermediate medium, and can also be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0045] In order to solve the technical problem of the relatively high cost of preparing existing battery electrodes, the present utility model provides a battery electrode sheet preparation device. The following will describe the specific structure of the battery electrode sheet preparation device in detail in three embodiments with reference to the accompanying drawings.

[0046] Embodiment 1

[0047] As Figure 1 shown, this embodiment discloses a battery electrode sheet preparation device, which includes an unwinding mechanism 1, a corona mechanism 2, a coating mechanism 3, a drying mechanism 4, a film-forming mechanism, a rewinding mechanism 6 and an auxiliary roller 7.

[0048] Among them, the unwinding mechanism 1, the corona mechanism 2, the coating mechanism 3 and the drying mechanism 4 are arranged in sequence, and the unwinding mechanism 1 includes an unwinding roller, a bracket and a driving motor, wherein the unwinding roller is wound with a current collector, and the unwinding roller is detachably arranged on the bracket. The driving motor is connected to the unwinding roller for driving the unwinding roller to rotate so that the unwinding roller can unwind the current collector.

[0049] The corona mechanism 2 is used to corona the current collector. The corona mechanism 2 is specifically an ordinary corona machine. By corona treating the current collector, the oil layer on the surface of the current collector can be treated to improve the coating degree of the current collector surface so as to facilitate the subsequent carbonization of the current collector. Two auxiliary rollers 7 are arranged at intervals between the unwinding mechanism 1 and the corona mechanism 2. The current collector winding belt passes through the auxiliary rollers 7. The auxiliary rollers 7 mainly play the role of guiding and correcting, so that the current collector entering the corona machine will not be offset, thereby ensuring that the current collector is not damaged. Regarding the number of auxiliary rollers 7, it should be noted that although there are two auxiliary rollers 7 in this embodiment, this is not a limitation of the utility model. Without departing from the principle of the utility model, in other embodiments, more auxiliary rollers 7 can be set according to the spacing distance between the corona mechanism 2 and the unwinding mechanism 1 and the characteristics of the current collector. This does not deviate from the basic principle of the utility model and will fall within the protection scope of the utility model.

[0050] The coating mechanism 3 is used to coat carbon on both sides of the current collector. The coating mechanism 3 includes two first coating heads, which are respectively arranged on both sides of the current collector and are used to coat carbon on both sides of the current collector. The specific structure of the first coating head is the same as that of the carbon coating head in the prior art, and the specific structure is not repeated here.

[0051] Three auxiliary rollers 7 are arranged at intervals between the coating mechanism 3 and the corona mechanism 2, and the current collector is wound through the auxiliary rollers 7; the auxiliary rollers 7 mainly play the role of guiding and correcting, so that the current collector entering the coating mechanism 3 will not be offset, thereby ensuring that the current collector is not damaged. Regarding the number of auxiliary rollers 7, it should be noted that although there are three auxiliary rollers 7 in this embodiment, this is not a limitation of the utility model. Without departing from the principle of the utility model, in other embodiments, according to the spacing distance between the corona mechanism 2 and the coating mechanism 3 and the characteristics of the current collector, more auxiliary rollers 7 can be set, which does not deviate from the basic principle of the utility model and will fall within the protection scope of the utility model.

[0052] The drying mechanism 4 is arranged downstream of the coating mechanism 3 and is used to dry the carbon-coated current collector. The drying mechanism 4 includes a box body and a blowing nozzle 44 arranged in the box body. Specifically, the blowing nozzle 44 is arranged on both sides of the upper and lower sides of the belt conveying position, so that both sides of the current collector can be blown by hot air to quickly dry the carbon-coated current collector.

[0053] The film forming mechanism is used to arrange electrode materials on both sides of the current collector and form a film to obtain a battery electrode sheet. Specifically, the film forming mechanism includes a second coating head, a first drying assembly, a third coating head, and a second drying assembly. The second coating head is arranged downstream of the drying mechanism 4. The second coating head is used to coat electrode paste on the first side of the current collector. The first drying assembly is located downstream of the second coating head and is used to dry the current collector coated with electrode paste.

[0054] There are two auxiliary rollers 7 arranged at intervals between the drying mechanism 4 and the second coating head. The current collector passes around the auxiliary rollers 7. The auxiliary rollers 7 mainly play a role in guiding and correcting deviation, so that the current collector entering the second coating head will not shift, thereby ensuring that the current collector is not damaged. Regarding the number of the auxiliary rollers 7, it should be noted that although there are two auxiliary rollers 7 in this embodiment, this is not a limitation of the present invention. On the premise of not deviating from the principle of the present invention, in other embodiments, according to the interval distance between the drying mechanism 4 and the second coating head and the characteristics of the current collector, more auxiliary rollers 7 can be set, which do not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0055] There is one auxiliary roller 7 arranged between the first drying assembly and the second coating head. The current collector passes around the auxiliary roller 7. The auxiliary roller 7 mainly plays a role in guiding and correcting deviation, so that the current collector entering the first drying assembly will not shift, thereby ensuring that the current collector is not damaged. Regarding the number of the auxiliary rollers 7, it should be noted that although there is one auxiliary roller 7 in this embodiment, this is not a limitation of the present invention. On the premise of not deviating from the principle of the present invention, in other embodiments, according to the interval distance between the first drying assembly and the second coating head and the characteristics of the current collector, more auxiliary rollers 7 can be set, which do not deviate from the basic principle of the present invention and will fall within the protection scope of the present invention.

[0056] The third coating head is located downstream of the first drying assembly and is used to coat electrode paste on the second side of the current collector. The second drying assembly is located downstream of the third coating head and is used to dry the current collector coated with electrode paste.

[0057] Two auxiliary rollers 7 are arranged at intervals between the first drying component and the third coating head, and the current collector is wound around the auxiliary rollers 7; the auxiliary rollers 7 mainly play the role of guiding and correcting, so that the current collector entering the third coating head will not be offset, thereby ensuring that the current collector is not damaged. Regarding the number of auxiliary rollers 7, it should be noted that although there are two auxiliary rollers 7 in this embodiment, this is not a limitation of the utility model. Without departing from the principle of the utility model, in other embodiments, according to the spacing distance between the first drying component and the third coating head and the characteristics of the current collector, more auxiliary rollers 7 can be set, which does not deviate from the basic principle of the utility model and will fall within the protection scope of the utility model.

[0058] In this embodiment, the electrode slurry is coated on both sides of the current collector and then dried to form a film, that is, a wet film forming method is adopted.

[0059] The first drying assembly is integrated on the drying mechanism 4, and the second drying assembly is integrated on the drying mechanism 4. That is, the drying mechanism 4 includes three drying parts, including the first drying part 41, the second drying part 42 and the third drying part 43, wherein the first drying part 41 is used to dry the current collector after carbonization, the second drying part 42 is used to dry the current collector coated with electrode slurry on the first side, and the third drying part 43 is used to dry the current collector coated with electrode slurry on the second side. The integrated arrangement of the drying mechanism 4, the first drying assembly and the second drying assembly can save energy and space, and is more conducive to saving the manufacturing cost of battery pole pieces.

[0060] Regarding the drying mechanism 4, the first drying component and the second drying component, it should be noted that although the three are integrated together in the present embodiment, this is not a limitation of the present invention. Without departing from the principle of the present invention, in other embodiments, those skilled in the art may choose to design the three separately, wherein the specific structures of the first drying component and the second drying component are the same as the structure of the drying mechanism 4.

[0061] The drying mechanism 4 includes a box body and a plurality of blowing nozzles 44 disposed in the box body, and the blowing nozzles 44 are used to blow hot air to the current collector to dry the current collector. Three belt conveying areas are disposed in the box body, and the three belt conveying areas are respectively treated as three drying parts; each drying area is provided with a plurality of blowing nozzles 44, which are used to blow hot air to the current collector.

[0062] The winding mechanism 6 is arranged downstream of the film forming mechanism and is used to wind up the battery electrode sheet. The winding mechanism 6 includes a winding roller, a bracket and a driving motor, wherein the winding roller is detachably arranged on the bracket, and the driving motor is connected to the winding roller for driving the winding roller to rotate; the driving motor drives the winding roller to rotate to wind up the battery electrode sheet.

[0063] Integrating the carbon-coated coating mechanism 3 and the film-forming mechanism can complete the work of carbon coating and film forming in one go, eliminating the need for intermediate transfer and storage, etc. This can save energy consumption, required space, and manpower in the production of battery electrodes, thereby reducing the production cost of battery electrodes.

[0064] Embodiment 2

[0065] This embodiment discloses a battery electrode preparation device, which has basically the same structure as the battery electrode preparation device in Embodiment 1, except for the specific structures of the film-forming mechanism and the drying mechanism 4. The film-forming mechanism in this embodiment uses dry film forming.

[0066] As Figure 2 shown, the drying mechanism 4 only includes one drying part, which is used to dry the current collector after carbon coating.

[0067] The film-forming mechanism includes a first film-forming component 53 and a first thermal composite component 54 arranged on the first side of the current collector. The first film-forming component 53 performs hot roll pressing on the electrode material to form a first battery film. The first thermal composite component 54 is arranged downstream of the first film-forming component 53, and the first thermal composite component 54 is used for thermally compounding the current collector and the first battery film.

[0068] Among them, the first film-forming component 53 includes a feeding mechanism 531, a film-forming component 532, a thinning component 533, and a cutting component arranged in sequence. The film-forming component 532 includes two film-forming rollers arranged side by side, and the thinning component 533 is specifically a three-roller thinning module. The feeding mechanism 531 feeds electrode powder between the two film-forming rollers, and the two film-forming rollers perform hot roll pressing on the electrode powder to form a preliminary film; then, the thinning module of the three-roller thinning roller group performs hot roll pressing and thinning, and then the cutting component cuts the two sides to obtain a first battery film with a qualified width. The first thermal composite component 54 is arranged downstream of the cutting component and the drying mechanism 4, and performs hot roll pressing on the current collector and the first battery film that come along the belt. In order to enable the battery film and the current collector to smoothly and correctly enter the first thermal composite component 54, auxiliary rollers 7 are arranged between the cutting component and the first thermal composite component 54 for guiding, and auxiliary rollers 7 are also arranged between the drying mechanism 4 and the first thermal composite component 54 for guiding. Among them, the first thermal composite component 54 includes two composite rollers, and the first battery film and the current collector pass between the two composite rollers, and the composite rollers perform thermal compounding on them. In order to enable the film-forming rollers, thinning rollers, and composite rollers to perform hot roll pressing, electric heating cores are arranged inside the film-forming rollers, thinning rollers, and composite rollers, so that the film-forming rollers, thinning rollers, and composite rollers can perform hot roll pressing.

[0069] The film forming mechanism further includes a second film forming assembly 55 and a second thermal composite assembly 56 disposed on the second side of the current collector. The second film forming assembly 55 performs hot roll pressing on the electrode material to form a second battery film sheet. The second thermal composite assembly 56 is disposed downstream of the second film forming assembly 55, and the second thermal composite assembly 56 is used for thermally composite the current collector and the second battery film sheet. Wherein the second thermal composite assembly 56 is located downstream of the first thermal composite assembly 54, that is, after the first battery film sheet and the current collector are thermally composite, the second battery film sheet and the current collector are then thermally composite by the second thermal composite assembly 56.

[0070] Wherein the second film forming assembly 55 includes a feeding mechanism 531, a film forming assembly 532, a thinning assembly 533, and a cutting assembly arranged in sequence. The film forming assembly 532 includes two film forming rollers arranged side by side. The thinning assembly 533 is specifically a three-roller thinning module. The feeding mechanism 531 feeds the electrode powder between the two film forming rollers, and the two film forming rollers perform hot roll pressing on the electrode powder to form a preliminary film sheet; then the thinning module of the three-roller thinning roller group performs hot roll pressing and thinning, and then the cutting assembly cuts the two sides to obtain a second battery film sheet with a suitable width. The second thermal composite assembly 56 is disposed downstream of the cutting assembly and the drying mechanism 4, and performs hot roll pressing on the current collector and the second battery film sheet that come along the belt. In order to enable the battery film sheet and the current collector to smoothly and correctly enter the second thermal composite assembly 56, a guiding roller 7 is provided between the cutting assembly and the second thermal composite assembly 56 for guiding, and a guiding roller 7 is also provided between the first thermal composite assembly 54 and the second thermal composite assembly 56 for guiding. Wherein the second thermal composite assembly 56 includes two composite rollers, and the second battery film sheet and the current collector pass between the two composite rollers, and the composite rollers perform thermal composite on them. In order to enable the film forming rollers, thinning rollers, and composite rollers to perform hot roll pressing, electric heating cores are provided in the film forming rollers, thinning rollers, and composite rollers, which can enable the film forming rollers, thinning rollers, and composite rollers to perform hot roll pressing.

[0071] The specific components, thickness, width, etc. of the first battery film sheet and the second battery film sheet are the same, but they are respectively located on both sides of the current collector.

[0072] Embodiment III

[0073] This embodiment discloses a battery electrode sheet preparation device, which has basically the same structure as the battery electrode sheet preparation device in Embodiment II, except for the specific structure of the film forming mechanism. The film forming mechanism in this embodiment uses a formed battery film sheet; that is, there is no need to form a battery film sheet.

[0074] Such as Figure 3As shown, the film forming mechanism includes a first unwinding assembly 57 and a first thermal composite assembly 54 disposed on the first side of the current collector. The specific structure of the first unwinding assembly 57 is the same as that of the unwinding mechanism 1 and is used for unwinding the first battery film. The first thermal composite assembly 54 is disposed downstream of the first unwinding assembly 57 and the drying mechanism 4 and performs hot roll pressing on the current collector and the first battery film that are conveyed. In order to enable the first battery film and the current collector to smoothly and correctly enter the first thermal composite assembly 54, guide rollers 7 are provided between the first unwinding assembly 57 and the first thermal composite assembly 54 for guiding, and guide rollers 7 are also provided between the drying mechanism 4 and the first thermal composite assembly 54 for guiding. The first thermal composite assembly 54 includes two composite rollers. The first battery film and the current collector pass between the two composite rollers, and the composite rollers perform thermal composite on them. In order to enable the composite rollers to perform hot roll pressing, electric heating cores are provided inside the composite rollers, which can enable the composite rollers to perform hot roll pressing.

[0075] The film forming mechanism further includes a second unwinding assembly 58 and a second thermal composite assembly 56 disposed on the second side of the current collector. The specific structure of the second unwinding assembly 58 is the same as that of the unwinding mechanism 1 and is used for unwinding the second battery film. The second thermal composite assembly 56 is disposed downstream of the second unwinding assembly 58 and the drying mechanism 4 and performs hot roll pressing on the current collector and the second battery film that are conveyed. In order to enable the second battery film and the current collector to smoothly and correctly enter the second thermal composite assembly 56, guide rollers 7 are provided between the second unwinding assembly 58 and the second thermal composite assembly 56 for guiding, and guide rollers 7 are also provided between the drying mechanism 4 and the second thermal composite assembly 56 for guiding. The second thermal composite assembly 56 includes two composite rollers. The second battery film and the current collector pass between the two composite rollers, and the composite rollers perform thermal composite on them. In order to enable the composite rollers to perform hot roll pressing, electric heating cores are provided inside the composite rollers, which can enable the composite rollers to perform hot roll pressing. The second thermal composite assembly 56 is located downstream of the first thermal composite assembly 54, that is, after the first battery film and the current collector are thermally composite, the second battery film and the current collector are then thermally composite by the second thermal composite assembly 56.

[0076] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A battery pole piece preparation device, characterized in that: It includes: A coating mechanism (3) for coating carbon on both sides of the current collector; A drying mechanism (4), which is arranged downstream of the coating mechanism (3) and is used to dry the carbon-coated current collector; The film forming mechanism is arranged downstream of the drying mechanism (4) and is used to arrange electrode materials on both sides of the current collector and form a film to obtain a battery electrode sheet.

2. The battery pole piece preparation device according to claim 1, characterized in that: The coating mechanism (3) comprises two first coating heads, which are respectively arranged on both sides of the current collector and are used to coat carbon on both sides of the current collector.

3. The battery pole piece preparation device according to claim 1, characterized in that: The film forming mechanism comprises a second coating head and a first drying assembly, wherein the second coating head is used to coat the electrode slurry on the first side of the current collector, and the first drying assembly is located downstream of the second coating head and is used to dry the current collector coated with the electrode slurry; and / or The film forming mechanism includes a third coating head and a second drying component. The third coating head is located downstream of the first drying component and is used to coat the electrode slurry on the second side of the current collector. The second drying component is located downstream of the third coating head and is used to dry the current collector coated with the electrode slurry.

4. The battery pole piece preparation device according to claim 3, characterized in that: The first drying component is integrated on the drying mechanism (4); and / or The second drying component is integrated on the drying mechanism (4).

5. The battery pole piece preparation device according to claim 1, characterized in that: The drying mechanism (4) comprises a box body and a plurality of blowing nozzles (44) arranged in the box body, wherein the blowing nozzles (44) are used to blow hot air to the current collector to dry the current collector.

6. The battery pole piece preparation device according to claim 1, characterized in that: The film forming mechanism comprises: A first thermal composite component (54) is disposed on the first side of the current collector, the first thermal composite component (54) being used for thermally composite the current collector and the first battery film on the first side of the current collector; and / or A second thermal composite component (56) is disposed on the second side of the current collector, and the second thermal composite component (56) is used to thermally composite the current collector and a second battery film on the second side of the current collector.

7. The battery pole piece preparation device according to claim 6, characterized in that: The film forming mechanism also includes: A first film forming component (53) is arranged between the first thermal composite component (54) and the drying mechanism (4), and the first film forming component (53) performs hot rolling on the electrode material to form a first battery membrane; and / or A second film forming assembly (55) is disposed between the second thermal composite assembly (56) and the drying mechanism (4), and the second film forming assembly (55) performs hot rolling on the electrode material to form a second battery membrane; or The film forming mechanism also includes: A first unwinding assembly (57), which is arranged upstream of the first thermal composite assembly (54) and is used to unwind the first battery membrane; and / or The second unwinding assembly (58) is arranged upstream of the second thermal composite assembly (56) and is used to unwind the second battery film.

8. The battery pole piece preparation device according to claim 1, characterized in that: The battery pole piece preparation device further comprises a corona mechanism (2), which is arranged upstream of the coating mechanism (3) and is used to perform corona on the current collector.

9. The battery pole piece preparation device according to claim 8, characterized in that: The battery pole piece preparation device also includes: an unwinding mechanism (1), which is arranged upstream of the corona mechanism (2) and is used for unwinding the current collector; and / or A winding mechanism (6) is arranged downstream of the film forming mechanism and is used for winding the battery pole sheet.

10. The battery pole piece preparation device according to claim 9, characterized in that: The battery pole piece preparation device further comprises an auxiliary roller (7); The auxiliary roller (7) is arranged between the unwinding mechanism (1) and the corona mechanism (2); and / or The auxiliary roller (7) is arranged between the corona mechanism (2) and the coating mechanism (3); and / or The auxiliary roller (7) is arranged between the drying mechanism (4) and the film forming mechanism; and / or The auxiliary roller (7) is arranged between the film forming mechanism and the winding mechanism (6).

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