Battery slurry transfer mechanism and coating apparatus

Abstract

The utility model discloses a kind of battery slurry transmission mechanism and coating equipment, belong to battery processing technical field.The battery slurry transmission mechanism includes slurry pipe and cooling component, slurry pipe is used to transmit battery slurry, at least part of slurry pipe is located above oven;The outer circumferential ring of at least part of slurry pipe above oven is equipped with cooling component.The battery slurry transmission mechanism, by setting cooling component in the outer circumferential of slurry pipe, can play the role of heat insulation between slurry pipe and oven, to avoid battery slurry in slurry pipe be influenced by oven high temperature, to ensure the stability of battery slurry in slurry pipe, to ensure the coating effect of entire coating equipment in turn;By setting cooling component, the need of protective layer outside slurry pipe in relevant technology can be avoided frequently replaced, to reduce coating cost.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, specifically to a battery slurry transfer mechanism and coating equipment. Background Technology

[0002] Lithium-ion batteries are widely used in mobile electronic devices such as Bluetooth headsets, mobile phones, laptops, tablets, and cameras, as well as portable power banks, due to their advantages such as light weight and good safety performance.

[0003] The coating process of electrodes is a key step in the production of lithium-ion batteries. The quality and consistency of the coating directly affect the capacity, safety, and processing cost of lithium-ion batteries. Coating equipment in related technologies typically includes an unwinding mechanism, an A-side coating mechanism, a B-side coating mechanism, an oven, and a winding mechanism. The unwinding mechanism unwinds the current collector strip. The A-side and B-side coating mechanisms coat the A and B sides of the current collector, respectively. The A-side and B-side coatings on the current collector are then dried in the oven to obtain the electrode sheet. Finally, the winding mechanism winds the electrode sheet back up.

[0004] To facilitate the transfer of battery slurry, the coating equipment also includes a battery slurry transfer mechanism. This mechanism transfers the battery slurry to the A-side coating mechanism and the B-side coating mechanism, which are located on opposite sides of the oven. Therefore, the slurry pipe of the battery slurry transfer mechanism must pass above the oven. To prevent the high temperature of the oven from affecting the stability of the battery slurry in the pipe, a protective layer is typically installed over the slurry pipe in related technologies. This protective layer is usually made of polyurethane foam or rubber-plastic insulation material. However, prolonged exposure to high temperatures can easily lead to cracking, powdering, or even decomposition, resulting in a loss of insulation effectiveness. This necessitates frequent replacement, increasing coating costs. Furthermore, the protective layer is easily damaged during the installation or maintenance of the slurry pipe, affecting its insulation performance and consequently the coating effect of the electrode sheets.

[0005] Therefore, there is an urgent need for a battery slurry transport mechanism to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to solve or at least alleviate some or all of the aforementioned problems. Therefore, the purpose of this invention is to provide a battery slurry transport mechanism and coating equipment that can maintain the stability of the battery slurry in the slurry pipeline, reduce coating costs, and improve coating effect.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A battery slurry transfer mechanism, comprising:

[0009] A slurry tube for conveying battery slurry, at least a portion of which is located above the oven;

[0010] A cooling assembly is provided around the outer periphery of at least the portion of the slurry pipe above the oven.

[0011] As a preferred embodiment of the battery slurry transport mechanism provided by this utility model, the cooling component includes a cooling pipe, which is sleeved outside the slurry pipe, and a heat-insulating space is formed between the inner wall of the cooling pipe and the outer wall of the slurry pipe for the coolant to pass through.

[0012] As a preferred embodiment of the battery slurry transport mechanism provided by this utility model, there are multiple slurry tubes arranged in a ring array, and the cooling tube is sleeved on all of the slurry tubes.

[0013] As a preferred embodiment of the battery slurry transport mechanism provided by this utility model, the distance between the outer wall of the slurry tube and the inner wall of the cooling tube gradually increases in the direction away from the oven.

[0014] As a preferred embodiment of the battery slurry transport mechanism provided by this utility model, the cooling assembly includes a plurality of cooling pipes, which are arranged around the outer periphery of the slurry pipe.

[0015] As a preferred embodiment of the battery slurry transport mechanism provided by this utility model, there are multiple slurry tubes, which are arranged in a ring array, and multiple cooling tubes are arranged around all the slurry tubes.

[0016] As a preferred embodiment of the battery slurry transport mechanism provided by this utility model, two adjacent cooling pipes are in contact; or

[0017] There is a gap between two adjacent cooling pipes, and the gap gradually increases in the direction away from the oven.

[0018] As a preferred embodiment of the battery slurry transport mechanism provided by this utility model, the outer wall of each cooling tube is in contact with the outer wall of the slurry tube.

[0019] As a preferred embodiment of the battery slurry transport mechanism provided by this utility model, the cross-sectional shape of the cooling pipe is elliptical or polygonal.

[0020] This utility model also provides a coating device, comprising:

[0021] An unwinding mechanism is configured to unwind electrode strip, the electrode strip including opposing first and second surfaces;

[0022] The coating mechanism includes a first coating component and a second coating component, which are located on opposite sides of the oven. The first coating component is used to coat a battery paste onto a first side of the electrode strip passing through it, and the second coating component is used to coat a battery paste onto a second side of the electrode strip passing through it. The oven is used to dry the electrode strip coated with battery paste.

[0023] The winding mechanism is configured to wind up the coated electrode strip;

[0024] The battery slurry transport mechanism described above is configured to transport battery slurry to the first coating assembly and the second coating assembly.

[0025] The beneficial effects of this utility model are as follows:

[0026] The battery slurry transport mechanism provided by this utility model can serve as a heat insulator between the slurry pipe and the oven by setting a cooling component on the outer periphery of the slurry pipe. This prevents the battery slurry in the slurry pipe from being affected by the high temperature of the oven, thus ensuring the stability of the battery slurry in the slurry pipe and ensuring the coating effect of the entire coating equipment. By setting the cooling component, the need for frequent replacement of the protective layer outside the slurry pipe in related technologies can be avoided, thereby reducing coating costs.

[0027] The coating equipment provided in this embodiment, by applying the battery slurry transfer mechanism described above, can maintain the stability of the battery slurry in the slurry pipeline, reduce coating costs, and improve coating effect. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the coating equipment provided by this utility model;

[0030] Figure 2 This is a partial structural schematic diagram of the battery slurry transport mechanism provided in Embodiment 1 of this utility model;

[0031] Figure 3 This is a partial structural schematic diagram of the battery slurry transport mechanism provided in Embodiment 2 of this utility model;

[0032] Figure 4 This is a partial structural schematic diagram of the battery slurry transport mechanism provided in Embodiment 3 of this utility model.

[0033] Figure label:

[0034] 1000, electrode material strip;

[0035] 100. Battery slurry transfer mechanism; 110. Slurry pipe; 120. Cooling pipe; 1201. Insulation space;

[0036] 200. Unwinding mechanism;

[0037] 300. Receiving and collecting mechanism;

[0038] 410. First coating assembly; 411. First coating roller; 412. First coating die; 420. Second coating assembly; 421. Second coating roller; 422. Second coating die;

[0039] 500, drying oven;

[0040] 601. Reversing roller. Detailed Implementation

[0041] Before explaining any embodiment of the present invention in detail, it should be understood that the present invention is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0042] In this invention, the terms "comprising," "including," "having," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0043] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "and / or" relationship.

[0044] In this invention, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0045] In this invention, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0046] In this invention, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can be performed by one part, one component, or a combination of multiple parts.

[0047] In this utility model, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. Furthermore, in the context, it should be understood that when one element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent the direct orientation but can also be understood as the lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0048] Figure 1 A schematic diagram of the coating equipment provided by this utility model is shown. Figure 1As shown, this utility model provides a coating device, which includes an unwinding mechanism 200, a winding mechanism 300, a coating mechanism, and an oven 500. The unwinding mechanism 200 is configured to unwind an electrode strip 1000, which includes a first side and a second side. The coating mechanism includes a first coating component 410 and a second coating component 420, which are located on opposite sides of the oven 500. The first coating component 410 is used to coat the first side of the electrode strip 1000 with battery paste, and the second coating component 420 is used to coat the second side of the electrode strip 1000 with battery paste. The oven 500 is used to dry the electrode strip 1000 coated with battery paste. The winding mechanism 300 is configured to wind up the coated electrode strip 1000.

[0049] refer to Figure 1 The working process of the coating equipment is as follows: 1) The unwinding mechanism 200 unwinds the electrode strip 1000; 2) The electrode strip 1000 first passes through the first coating component 410, which is used to coat the first side of the electrode strip 1000 with battery paste; 3) The electrode strip 1000 coated with battery paste on the first side passes through the drying oven 500, which performs the first drying operation on the electrode strip 1000; 4) The dried electrode strip 1000 is then transferred to the second coating component 420, which is used to coat the second side of the electrode strip 1000 with battery paste; 5) The electrode strip 1000 coated with battery paste on the second side passes through the drying oven 500 again, which performs the second drying operation on the electrode strip 1000; 6) The dried electrode strip 1000 is wound up by the winding mechanism 300. By passing the electrode strip 1000 through the oven 500 twice, the electrode strip 1000 can be prevented from being transferred to the second coating assembly 420 before the battery paste on the first side is dry, thus avoiding affecting the coating effect.

[0050] Optionally, the coating equipment further includes a reversing roller 601, which is located between the first coating assembly 410 and the second coating assembly 420. When the electrode strip 1000 is transferred between the unwinding mechanism 200 and the reversing roller 601, the first side of the electrode strip 1000 is located outside the first coating roller 411 of the first coating assembly 410, thereby facilitating the first coating die 412 of the first coating assembly 410 to coat the battery paste on the first side; when the electrode strip 1000 is transferred between the reversing roller 601 and the winding mechanism 300, the second side of the electrode strip 1000 is located outside the second coating roller 421 of the second coating assembly 420, thereby facilitating the second coating die 422 of the second coating assembly 420 to coat the battery paste on the second side.

[0051] It should be noted that the unwinding mechanism 200, the winding mechanism 300, the first coating assembly 410, the second coating assembly 420, and the oven 500 are all relatively mature devices in the field. The specific structure and working principle of the unwinding mechanism 200, the winding mechanism 300, the first coating assembly 410, the second coating assembly 420, and the oven 500 will not be described in detail in this embodiment.

[0052] To facilitate the transfer of battery slurry, the coating equipment also includes a battery slurry transfer mechanism 100. This mechanism is configured to transfer battery slurry to the first coating assembly 410 and the second coating assembly 420, ensuring the continuity of the coating process. In related technologies, the slurry pipe of the battery slurry transfer mechanism 100 passes above the oven 500. To prevent the high temperature of the oven 500 from affecting the stability of the battery slurry in the pipe, a protective layer is typically fitted over the slurry pipe. This protective layer is made of polyurethane foam or rubber-plastic insulation material. Prolonged exposure to high temperatures can easily lead to cracking, powdering, or even decomposition, resulting in a loss of insulation effect. Frequent replacement is required, increasing coating costs. Furthermore, the protective layer is easily damaged during the installation or maintenance of the slurry pipe, affecting its insulation effect and consequently the coating effect of the electrode.

[0053] To address the aforementioned problems, this utility model also provides a battery slurry transport mechanism 100 to maintain the stability of the battery slurry in the slurry pipeline, reduce coating costs, and improve coating effect. The specific structure of the battery slurry transport mechanism 100 provided by this utility model will be described in detail below through several embodiments.

[0054] Example 1

[0055] Figure 2 A partial structural schematic diagram of the battery slurry transfer mechanism 100 provided in this embodiment is shown. For example... Figure 2 and combined Figure 1 As shown, the battery slurry transfer mechanism 100 includes a slurry pipe 110 and a cooling assembly. The slurry pipe 110 is used to transfer battery slurry, and at least a portion of the slurry pipe 110 is located above the oven 500. The cooling assembly is provided around the outer periphery of the portion of the slurry pipe 110 at least above the oven 500.

[0056] The battery slurry transfer mechanism 100 provided in this embodiment, by setting a cooling component on the outer periphery of the slurry pipe 110, can serve as a heat insulator between the slurry pipe 110 and the oven 500, thereby preventing the battery slurry in the slurry pipe 110 from being affected by the high temperature of the oven 500, ensuring the stability of the battery slurry in the slurry pipe 110, and thus ensuring the coating effect of the entire coating equipment; by setting a cooling component, the need for frequent replacement of the protective layer outside the slurry pipe in related technologies can be avoided, thereby reducing coating costs.

[0057] like Figure 2 As shown, in this embodiment, the cooling assembly includes a cooling pipe 120, which is sleeved outside the slurry pipe 110. A heat-insulating space 1201 for coolant to pass through is formed between the inner wall of the cooling pipe 120 and the outer wall of the slurry pipe 110. This arrangement is simple in structure, easy to assemble, reduces processing costs, and improves assembly efficiency. In this embodiment, the coolant flowing into the heat-insulating space 1201 is cooling water. Of course, in other embodiments, the coolant can be other liquids capable of achieving a cooling function.

[0058] Furthermore, the cooling assembly also includes a circulation module (not shown in the figure). The inlet of the circulation module is connected to the outlet of the cooling pipe 120, and the outlet of the circulation module is connected to the inlet of the cooling pipe 120. A water pump is installed between the circulation module and the cooling pipe 120. Through the circulation module and the water pump, the coolant in the cooling pipe 120 can be circulated. That is, the coolant with a higher temperature in the cooling pipe 120 can be pumped into the circulation module to cool it down, while the coolant with a lower temperature in the circulation module can flow into the cooling pipe 120 to continuously cool the battery paste in the slurry pipe 110. This ensures that the temperature of the coolant in the cooling pipe 120 remains within a preset temperature range, guaranteeing its cooling effect on the battery paste in the slurry pipe 110. The circulation module is a relatively mature technology in this field, and its specific structure and working principle will not be described in detail in this embodiment.

[0059] In some embodiments, the cooling pipe 120 is only fitted onto the portion of the slurry pipe 110 above the oven 500 to reduce the amount of material used in the cooling pipe 120 and lower material costs. In other embodiments, the cooling pipe 120 is fitted onto all parts of the slurry pipe 110 to further ensure cooling and heat insulation effects.

[0060] Continue as Figure 2 As shown, the distance between the outer wall of the slurry pipe 110 and the inner wall of the cooling pipe 120 gradually increases in the direction away from the oven 500. It is understood that the temperature is higher on the slurry pipe 110 closer to the oven 500. By setting the distance between the outer wall of the slurry pipe 110 and the inner wall of the cooling pipe 120 to gradually increase in the direction away from the oven 500, on the one hand, the width of the insulation space 1201 on the side of the slurry pipe 110 closest to the oven 500 can be increased, allowing more coolant to pass between the slurry pipe 110 and the oven 500, thus improving the cooling effect; on the other hand, the width of the insulation space 1201 on the side of the slurry pipe 110 furthest from the oven 500 can be reduced, thereby reducing the material used in the cooling pipe 120 and lowering processing costs.

[0061] Optionally, the cross-sectional shape of the cooling pipe 120 can be elliptical or polygonal. For example, the cross-sectional shape of the cooling pipe 120 can be circular, triangular, rectangular, pentagonal, hexagonal, etc. This embodiment does not limit the shape of the cooling pipe 120; designers can adjust it according to actual needs to facilitate manufacturing.

[0062] Example 2

[0063] This embodiment provides a battery slurry transfer mechanism 100, which is a further improvement on the first embodiment.

[0064] Figure 3 A partial structural schematic diagram of the battery slurry transfer mechanism 100 provided in this embodiment is shown. For example... Figure 3 As shown, in this embodiment, there are multiple slurry tubes 110 arranged in a ring array, and a cooling tube 120 is sleeved over all the slurry tubes 110. Compared to the scheme in Embodiment 1 where only one slurry tube 110 is provided, in this example, the inner tube volume of each slurry tube 110 is smaller, and the outer periphery of each slurry tube 110 is surrounded by coolant, which can further improve the cooling effect and improve the temperature uniformity of the battery slurry in the slurry tube 110.

[0065] Optionally, there is a gap between two adjacent slurry pipes 110. That is, any two slurry pipes 110 do not contact each other. This design can increase the contact area between the slurry pipes 110 and the coolant, thereby improving the cooling effect.

[0066] Example 3

[0067] This embodiment provides a battery slurry transfer mechanism 100, which has a similar structure to the battery slurry transfer mechanism 100 in Embodiment 1, except that the number of cooling pipes 120 is different.

[0068] Figure 4 A partial structural schematic diagram of the battery slurry transfer mechanism 100 provided in this embodiment is shown. For example... Figure 4 As shown, in this embodiment, the cooling assembly includes multiple cooling pipes 120, which are arranged around the outer periphery of the slurry pipe 110. This arrangement is simple in structure and easy to process and assemble. Optionally, the outer wall of each cooling pipe 120 is in contact with the outer wall of the slurry pipe 110 to increase the heat exchange efficiency between them and improve the cooling effect.

[0069] In some embodiments, two adjacent cooling pipes 120 are in contact. This design can reduce heat exchange between the slurry pipe 110 and the surrounding environment of the oven 500, thereby preventing the battery slurry in the slurry pipe 110 from being affected by the high temperature of the oven 500, thus ensuring the stability of the battery slurry. In this example, there may also be a gap between the outer wall of the cooling pipe 120 and the outer wall of the slurry pipe 110.

[0070] In other embodiments, there is a gap between two adjacent cooling pipes 120, and this gap gradually increases in the direction away from the oven 500. This arrangement increases the flow rate of coolant through the slurry pipe 110 near the oven 500, thereby improving the cooling effect; it also reduces the number of cooling pipes 120, thus reducing the material used and lowering processing costs.

[0071] Example 4

[0072] This embodiment provides a battery slurry transfer mechanism 100, which is a further improvement on the third embodiment.

[0073] refer to Figure 3 and Figure 4 In this embodiment, there are multiple slurry tubes 110 arranged in a ring array; there are also multiple cooling tubes 120 surrounding all the slurry tubes 110. Compared to the scheme in Embodiment 3 where only one slurry tube 110 is provided, in this example, the inner tube volume of each slurry tube 110 is smaller, which can improve the heat exchange efficiency between the battery slurry and the cooling tube 120, and also improve the temperature uniformity of the battery slurry in the slurry tube 110.

[0074] Optionally, there is a gap between two adjacent slurry pipes 110. That is, any two slurry pipes 110 do not contact each other. This design can prevent the battery slurry at the contact point of multiple slurry pipes 110 from not exchanging heat with the cooling pipe 120 in time, which would cause the temperature of the battery slurry at that point to be too high and affect the stability of the battery slurry.

[0075] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A battery slurry transfer mechanism, characterized in that, include: A slurry tube (110) for conveying battery slurry, at least a portion of which is located above the oven (500); The cooling assembly is provided around the outer periphery of at least the portion of the slurry pipe (110) above the oven (500).

2. The battery slurry transfer mechanism according to claim 1, characterized in that, The cooling assembly includes a cooling pipe (120) which is sleeved outside the slurry pipe (110). A heat-insulating space (1201) for coolant to pass through is formed between the inner wall of the cooling pipe (120) and the outer wall of the slurry pipe (110).

3. The battery slurry transfer mechanism according to claim 2, characterized in that, The number of slurry pipes (110) is multiple, and the multiple slurry pipes (110) are arranged in a ring array. The cooling pipe (120) is sleeved on all the slurry pipes (110).

4. The battery slurry transfer mechanism according to claim 2, characterized in that, The distance between the outer wall of the slurry pipe (110) and the inner wall of the cooling pipe (120) gradually increases in the direction away from the oven (500).

5. The battery slurry transfer mechanism according to claim 1, characterized in that, The cooling assembly includes a plurality of cooling pipes (120) arranged around the outer periphery of the slurry pipe (110).

6. The battery slurry transfer mechanism according to claim 5, characterized in that, The number of slurry pipes (110) is multiple, and the multiple slurry pipes (110) are arranged in a ring array. The multiple cooling pipes (120) are arranged around all the slurry pipes (110).

7. The battery slurry transfer mechanism according to claim 5, characterized in that, Two adjacent cooling pipes (120) are in contact; or There is a gap between two adjacent cooling pipes (120), and the gap gradually increases in the direction away from the oven (500).

8. The battery slurry transfer mechanism according to claim 5, characterized in that, The outer wall of each of the cooling pipes (120) is in contact with the outer wall of the slurry pipe (110).

9. The battery slurry transfer mechanism according to any one of claims 2 to 8, characterized in that, The cross-sectional shape of the cooling pipe (120) is elliptical or polygonal.

10. A coating apparatus, characterized in that, include: An unwinding mechanism (200) is configured to unwind an electrode strip (1000) comprising opposing first and second surfaces; The coating mechanism includes a first coating component (410) and a second coating component (420), which are located on opposite sides of the oven (500). The first coating component (410) is used to coat a battery paste onto a first side of the electrode strip (1000) passing through it, and the second coating component (420) is used to coat a battery paste onto a second side of the electrode strip (1000) passing through it. The oven (500) is used to dry the electrode strip (1000) coated with battery paste. The winding mechanism (300) is configured to wind up the coated electrode strip (1000); The battery slurry transfer mechanism according to any one of claims 1 to 9, wherein the battery slurry transfer mechanism is configured to transfer battery slurry to the first coating assembly (410) and the second coating assembly (420).

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