Pole piece coating die head structure and coating machine

Abstract

The utility model belongs to the technical field of battery processing, and particularly relates to a pole piece coating die head structure and a coating machine. A coating cavity is formed in the die head body; the die head body is further provided with a discharging channel communicated with the coating cavity. The supporting part is arranged in the die head body between the coating cavity and the discharging channel; the supporting part is used for supporting a pole piece to be coated; a guide structure is arranged in the supporting component; and the guide structure is used for guiding the slurry of the pole piece to be coated at the position of the guide structure. According to the utility model, the cleaning procedures of the position in a laser manner and the like can be reduced, so that the energy consumption cost of equipment is effectively reduced, and the coating processing efficiency can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery processing, and in particular relates to a pole piece coating die head structure and a coating machine. Background Art

[0002] The pole pieces of lithium-ion batteries need to be coated by coating equipment first and then cut into shape. After coating, rectangular grooves need to be opened on the pole pieces. Currently, the main method is to clean the rectangular grooves on the coated area of the pole pieces through laser cleaning. The rectangular grooves will serve as pole ears, and finally die-cutting is used to form the finished product.

[0003] Since rectangular slots cannot be formed in the initial coating stage, a laser cleaning process needs to be added later. This solution increases the process steps, equipment, energy consumption and corresponding inspection and scrapping. The cleaned material powder cannot be reused, resulting in reduced raw material utilization and coating processing efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a pole piece coating die head structure to improve the coating process efficiency in view of the deficiencies of the existing technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pole piece coating die structure comprises a die body and a supporting component; a coating cavity is provided in the die body; a discharge channel connected to the coating cavity is also provided on the die body; the supporting component is arranged inside the die body between the coating cavity and the discharge channel; the supporting component is used to support the pole piece to be coated; and a guide structure is provided inside the supporting component; the guide structure abuts against the pole piece to be coated; and the guide structure is used to guide the slurry of the pole piece to be coated at the guide structure position.

[0007] Preferably, the guide structure is recessed from the surface of the support component toward the support component body.

[0008] Preferably, the recessed depth of the guide structure is less than or equal to the thickness of the support component.

[0009] Preferably, a mounting guide groove is provided in the die body; the supporting component is connected to the opening of the mounting guide groove; and the bottom of the mounting guide groove is communicated with the outside of the die body.

[0010] Preferably, the installation guide groove includes an upper cavity and a lower cavity that are stacked; the support component is sealed and connected to the inner wall of the upper cavity; the guide structure is connected to the lower cavity;

[0011] Furthermore, the inner diameter L1 of the upper cavity is greater than the inner diameter L2 of the lower cavity.

[0012] Preferably, the die body is further provided with a discharge branch pipe; the discharge branch pipe passes through the guide hole at the side end of the die body and is connected to the bottom of the installation guide groove.

[0013] Preferably, the die body includes a second die body, a limiting component and a first die body stacked in sequence; the coating cavity is formed between the bottom of the second die body, the inner side of the limiting component and the top of the first die body; the discharge channel is formed between the bottom of the second die body, a side of the limiting component and the top of the first die body; and the supporting component is arranged on the first die body and below the limiting component.

[0014] Preferably, a slurry storage cavity communicating with the coating cavity is provided in the first mold body; a feed channel communicating with the slurry storage cavity is provided in the first mold body; and the feed channel is communicated with the outside of the first mold body.

[0015] Preferably, the limiting component includes a first limiting section and a second limiting section connected to at least one side end of the first limiting section; and a slurry flow channel is provided between the first limiting section and the second limiting section; the discharge channel and the coating cavity are respectively connected to the slurry flow channel; and the interior of the slurry flow channel is used to install the electrode to be coated.

[0016] The utility model also discloses a coating machine, which comprises the above-mentioned pole piece coating die head structure.

[0017] The beneficial effect of the present invention is that the present technical solution uses a guide structure to guide the slurry at the guide structure position of the electrode to be coated, so as to reduce the coating at this position of the electrode to be coated, so as to form a pole ear slot, thereby reducing the cleaning process of the position by laser or other means, thereby effectively reducing the energy consumption cost of the equipment and improving the coating processing efficiency; in addition, by arranging the guide structure between the coating cavity and the discharge channel, the orderly coating can be ensured, and the coating at this position of the electrode to be coated can also be reduced, thereby improving the coating processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following will refer to the attached Figures 1 to 4 To describe the features, advantages and technical effects of exemplary embodiments of the present invention.

[0019] Figure 1 This is an exploded view of the electrode coating die structure of one embodiment of the present invention;

[0020] Figure 2This is a schematic diagram of the overall structure of the electrode coating die structure of one embodiment of the present invention;

[0021] Figure 3 A cross-sectional view of the second die body of the electrode coating die structure according to one embodiment of the present invention;

[0022] Figure 4 This is a structural schematic diagram of the limiting component of the electrode coating die structure in one embodiment of the present utility model.

[0023] In the figure: 1-die body; 11-first die body; 111-first convex edge; 112-first fixing hole; 12-second die body; 121-second convex edge; 122-second fixing hole; 13-limiting component; 131-first limiting section; 132-second limiting section; 1321-bending connecting section; 133-slurry flow channel; 134-third fixing hole; 101-coating chamber; 102-installing guide groove; 103-guide hole; 104-slurry storage chamber; 105-discharge channel; 106-feed channel; 107-upper chamber; 108-lower chamber; 2-support component; 21-guide structure; 3-discharge branch pipe. DETAILED DESCRIPTION

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0025] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0026] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or multiple situations exist. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0028] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0029] The following is combined with Figures 1 to 4 The present invention is further described in detail, but is not intended to limit the present invention.

[0030] like Figure 1 and 2 As shown, in one embodiment of the present invention, the electrode coating die structure includes a die body 1 and a support component 2; a coating cavity 101 is provided in the die body 1; a discharge channel 105 connected to the coating cavity 101 is also provided on the die body 1; the support component 2 is arranged inside the die body 1 between the coating cavity 101 and the discharge channel 105; the support component 2 is used to support the electrode to be coated; and a guide structure 21 is provided in the support component 2; the guide structure 21 is used to abut against the electrode to be coated; and the guide structure 21 is used to guide the slurry of the electrode to be coated at the position of the guide structure 21.

[0031] The technical solution of the present invention adopts a guide structure to guide the slurry at the position of the guide structure where the electrode to be coated is located, so as to reduce the coating at this position of the electrode to be coated, so as to form a pole ear slot, thereby reducing the cleaning process of the position by means of laser or the like, thereby effectively reducing the energy consumption cost of the equipment and improving the coating processing efficiency; in addition, by arranging the guide structure between the coating cavity and the discharge channel, the orderly coating can be ensured, and the coating at this position of the electrode to be coated can be reduced, thereby improving the coating processing efficiency.

[0032] Specifically, in some embodiments, Figure 1As shown, the guide structure 21 is recessed from the surface of the support component 2 (the electrode to be coated) toward the main body of the support component 2; and the recessed opening of the guide structure 21 abuts against the electrode to be coated. This structure can be achieved by the inwardly recessed guide structure 21: during the coating process along the coating direction of the coating cavity and the discharge channel, the slurry stays in the guide structure 21, thereby reducing the coating of the electrode to be coated at this position to form the tab slot; thereby effectively reducing the energy consumption cost of the equipment and improving the coating processing efficiency. In some embodiments, the recessed depth of the guide structure 21 is less than or equal to the thickness of the support component 2. That is, when the recessed depth of the guide structure 21 is less than the thickness of the support component 2, after a certain period of coating, the slurry in the recess needs to be processed to ensure the formation of the tab slot. When the recessed depth of the guide structure 21 is equal to the thickness of the support component 2 (ie the guide structure 21 penetrates the support component 2), the slurry is discharged from the through hole away from the electrode to be coated with the help of other structures, thereby realizing the recycling function.

[0033] Specifically, in some embodiments, Figure 1 As shown, the die body 1 is provided with a guide groove 102; the support member 2 is connected to the opening of the guide groove 102; and the bottom of the guide groove 102 is connected to the outside of the die body 1. This structure discharges the slurry guided by the guide structure 21 to the outside of the die body 1 through the guide groove 102, thereby ensuring the formation of the tab slot while ensuring the orderliness and continuity of the coating operation, thereby improving the coating process efficiency.

[0034] Specifically, in some embodiments, Figure 1 and 2 As shown, the die body 1 is also provided with a discharge branch pipe 3; the discharge branch pipe 3 passes through the guide hole 103 at the side end of the die body 1 and is connected to the bottom of the guide groove 102. The discharge branch pipe 3 is used to connect to a reciprocating pump or a screw pump (hereinafter collectively referred to as a pump truck). During the coating process, when the guide structure 21 is coated, the pump truck is started to extract the slurry in the guide groove 102 to achieve the goal of not coating the material at the groove position; thereby ensuring the orderliness and continuity of the coating operation and improving the coating process efficiency.

[0035] Specifically, in some embodiments, Figure 1 and 3As shown, the installation guide trough 102 includes an upper cavity 107 and a lower cavity 108 stacked sequentially from top to bottom; the support component 2 is sealed to the inner wall of the upper cavity 107; the guide structure 21 is connected to the lower cavity 108; one end of the discharge branch pipe 3 is connected to the lower cavity 108; and the inner diameter L1 of the upper cavity 107 is greater than the inner diameter L2 of the lower cavity 108. This structure, through the inverted convex-shaped installation guide trough 102 formed by the upper cavity 107 and the lower cavity 108, can achieve a punch-free installation method for the support component 2, thereby improving the convenience and stability of assembly, and can ensure the formation of the tab slot while ensuring the orderliness and continuity of the coating operation, thereby improving the efficiency of the coating process.

[0036] Specifically, in some embodiments, Figure 1 As shown, the die body 1 includes a second die body 12, a limiting component 13 and a first die body 11 stacked in sequence from top to bottom; the coating cavity 101 is formed between the bottom of the second die body 12, the inner side of the limiting component 13 and the top of the first die body 11; the discharge channel 105 is formed between the bottom of the second die body 12, a side of the limiting component 13 and the top of the first die body 11; and the supporting component 2 is arranged on the first die body 11 and below the limiting component 13. This structure can further improve the assembly stability of the supporting component 2 through the abutment and limiting effect of the limiting component 13 on the supporting component 2, thereby ensuring the orderly progress of coating. Among them, as Figure 1 、 3 As shown in Figures 4 and 5, the first mold body 11 is provided with at least one first fixing hole 112; the second mold body 12 is provided with at least one second fixing hole 122 corresponding to the first fixing hole 112; and the limiting component 13 is provided with at least one third fixing hole 134 corresponding to the first fixing hole 112 and the second fixing hole 122. Furthermore, the second mold body 12, the limiting component 13, and the first mold body 11 are fixed together by fixing bolts respectively assembled in the first fixing hole 112, the second fixing hole 122, and the third fixing hole 134.

[0037] Specifically, in some embodiments, Figure 2 As shown, the side end of the first mold body 11 is provided with a first convex edge 111; the side end of the second mold body 12 is provided with a second convex edge 121; and the first convex edge 111 is arranged below the second convex edge 121; the discharge channel 105 is arranged between the first convex edge 111 and the second convex edge 121.

[0038] Specifically, in some embodiments, Figure 1 and 3As shown, the first mold body 11 is provided with a slurry storage cavity 104 that communicates with the coating cavity 101; the first mold body 11 is provided with a feed channel 106 that communicates with the slurry storage cavity 104; the feed channel 106 is connected to the outside of the first mold body 11. This structure ensures orderly coating and improves coating efficiency through material loading through the feed channel 106, storage in the slurry storage cavity 104, and diversion and coating in the coating cavity 101.

[0039] Specifically, in some embodiments, Figure 1 and 4 As shown, the limiting component 13 includes a first limiting section 131 and a second limiting section 132 connected to at least one side end of the first limiting section 131; and a slurry flow channel 133 is provided between the first limiting section 131 and the second limiting section 132; the discharge channel 105 and the coating chamber 101 are respectively connected to the slurry flow channel 133; and the electrode to be coated is provided inside the slurry flow channel 133. Figure 4 As shown, a bent connecting section 1321 is provided at one end of the second limiting section 132 away from the first limiting section 131; the bent connecting section 1321 is bent toward the slurry flow channel 133. This structure reduces the problem of excessive contamination of the die structure caused by the slurry flowing in all directions through the bent connecting section 1321.

[0040] The present invention also proposes a coating machine, which includes a pole piece coating die structure. The specific structure of the pole piece coating die structure refers to the above embodiment. Since this coating machine adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0041] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0042] Based on the disclosure and teachings of the above description, those skilled in the art will be able to make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments described above. Any obvious improvements, substitutions, or modifications made by those skilled in the art based on the present invention fall within the scope of protection of the present invention. In addition, although certain specific terms are used in this description, these terms are for convenience only and do not constitute any limitation on the present invention.

Claims

1. A pole piece coating die head structure, characterized by: It includes a die body and a supporting component; a coating cavity is provided in the die body; a discharge channel connected to the coating cavity is also provided on the die body; the supporting component is arranged inside the die body between the coating cavity and the discharge channel; the supporting component is used to support the electrode to be coated; and a guide structure is provided in the supporting component; and the guide structure is used to guide the slurry of the electrode to be coated in the guide structure position.

2. The electrode coating die structure according to claim 1, characterized in that: The guide structure is recessed from the surface of the support component toward the support component body.

3. The electrode coating die structure according to claim 2, characterized in that: The recessed depth of the guide structure is less than or equal to the thickness of the support component.

4. The electrode coating die structure according to any one of claims 1 to 3, characterized in that: The die body is provided with an installation guide groove; the support component is connected to the opening of the installation guide groove; and the bottom of the installation guide groove is communicated with the outside of the die body.

5. The electrode coating die structure according to claim 4, characterized in that: The installation guide groove includes an upper cavity and a lower cavity arranged in a stacked manner; the support component is sealed and connected to the inner wall of the upper cavity; the guide structure is connected to the lower cavity; Furthermore, the inner diameter L1 of the upper cavity is greater than the inner diameter L2 of the lower cavity.

6. The electrode coating die structure according to claim 4, characterized in that: The die body is further provided with a discharge branch pipe; the discharge branch pipe passes through the guide hole at the side end of the die body and is communicated with the bottom of the installation guide groove.

7. The electrode coating die structure according to claim 1, characterized in that: The die body includes a second die body, a limiting component and a first die body stacked in sequence; the coating cavity is formed between the bottom of the second die body, the inner side of the limiting component and the top of the first die body; the discharge channel is formed between the bottom of the second die body, a side of the limiting component and the top of the first die body; and the supporting component is arranged on the first die body and below the limiting component.

8. The electrode coating die structure according to claim 7, characterized in that: A slurry storage cavity communicating with the coating cavity is provided in the first mold body; a feed channel communicating with the slurry storage cavity is provided in the first mold body; and the feed channel is communicated with the outside of the first mold body.

9. The electrode coating die structure according to claim 7, characterized in that: The limiting component includes a first limiting section and a second limiting section connected to at least one side end of the first limiting section; and a slurry flow channel is provided between the first limiting section and the second limiting section; the discharge channel and the coating cavity are respectively connected to the slurry flow channel; and the interior of the slurry flow channel is used to install the electrode to be coated.

10. A coating machine, characterized in that: The electrode coating die structure comprises the electrode coating die structure according to any one of claims 1 to 9.

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