Coating device and coating machine

Abstract

The embodiment of the utility model provides a coating device and a coating machine, and the coating device comprises a coating die head which is provided with a cavity and a cooling space; the temperature control structure comprises a temperature sensing piece and a cooling piece, the temperature sensing piece is connected with the coating die head, and the cooling piece is connected with the temperature sensing piece so as to provide a cooling medium for the cooling space according to the temperature sensed by the temperature sensing piece. The coating die head is provided with a cooling space, a cooling medium is contained in the cooling space, and the temperature sensing part is arranged on the coating die head, so that when the coating die head coats a pole piece through slurry contained in a cavity of the coating die head, the temperature sensing part senses the temperature of the slurry, and when the temperature of the slurry exceeds a preset value, the temperature sensing part feeds the temperature back to the cooling part; and the cooling piece provides a cooling medium with corresponding pressure and temperature for the cooling space according to the temperature at the moment, so that the temperature in the cavity is constant all the time, the consistency of the flowability of the slurry is ensured, the consistency of the surface density is further ensured, and the quality of the pole piece is improved.

Description

Technical Field

[0001] The present application relates to the field of coating technology, and in particular to a coating device and a coating machine. Background Art

[0002] With the development of science and technology, lithium batteries have become mainstream. "Lithium batteries" are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high environmental requirements.

[0003] In the relevant technology, the coating die head is the most precise part of the coating machine. The surface density during coating affects the quality of the entire electrode. Therefore, how to improve the surface density during coating is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a coating device and a coating machine, which can improve the fluidity of the slurry and ensure consistent surface density.

[0005] In a first aspect, an embodiment of the present application provides a coating device, comprising: a coating die head, which is provided with a cavity and a cooling space, the cavity is configured to accommodate a slurry, the cooling space is configured to accommodate a cooling medium, and the cooling medium is configured to exchange heat with the cavity; a temperature control structure, which comprises a temperature sensing component and a cooling component, the temperature sensing component is connected to the coating die head, and the cooling component is connected to the temperature sensing component to provide the cooling medium to the cooling space according to the temperature sensed by the temperature sensing component.

[0006] In the above-mentioned implementation process, the coating die head is configured with a cooling space, and the cooling space contains a cooling medium. The temperature sensing component is configured on the coating die head, so that when the coating die head coats the electrode with the slurry contained in its cavity, the temperature sensing component senses the temperature of the slurry. When the temperature of the slurry exceeds a preset value, the temperature sensing component feeds it back to the cooling component. The cooling component provides a cooling medium with corresponding pressure and temperature to the cooling space according to the temperature at this time, so that the temperature in the cavity is always constant, thereby ensuring the consistency of the slurry fluidity, thereby ensuring the consistency of the surface density and improving the quality of the electrode.

[0007] In some embodiments, the coating die includes a first die, and the first die is provided with a first accommodating cavity and a first cooling cavity along its length direction. The first accommodating cavity is configured to accommodate the slurry, and the first cooling cavity is configured at the outer edge of the first accommodating cavity to accommodate the cooling medium.

[0008] In the above-mentioned implementation process, the first die head is configured with a first accommodating cavity and a first cooling cavity. The first cooling cavity is located at the outer edge of the first accommodating cavity, so that when the first die head coats the electrode with the slurry contained in its first accommodating cavity, the temperature sensing component senses the temperature of the slurry. When the temperature of the slurry exceeds a preset value, the temperature sensing component feeds it back to the cooling component. The cooling component provides a cooling medium of corresponding pressure and temperature to the first cooling cavity according to the temperature at this time, so that the temperature in the first accommodating cavity is always constant, thereby ensuring the consistency of the slurry fluidity, thereby ensuring the consistency of the surface density and improving the quality of the electrode.

[0009] In some embodiments, the first cooling chamber includes a plurality of first cooling pipes, which are spaced apart in sequence along the thickness direction of the first die head, each of the first cooling pipes is configured with the cooling medium, and the opening direction of each of the first cooling pipes is consistent.

[0010] In the above implementation process, a plurality of first cooling pipes are configured, and the plurality of first cooling pipes are spaced apart along the thickness direction of the first die head, and each first cooling pipe contains a cooling medium, so that the temperature control structure can control the pressure and temperature of the cooling medium in each first cooling pipe according to the actual temperature of the slurry in the first containing cavity, thereby ensuring the flow consistency of the slurry in the first containing cavity, and thereby improving the consistency of the surface density.

[0011] In some embodiments, a plurality of the first cooling pipes are each provided with a first heat-insulating member on a side away from each other, so as to prevent energy loss and affect the cooling effect.

[0012] In some embodiments, the first cooling channel is provided with a first inlet and a first outlet, the first inlet and the first outlet are located on the same side of the first die head, and the depth of the first cooling channel on the side close to the first inlet is less than the depth on the side away from the first inlet, which is beneficial to cooling the slurry so that the temperature in the first containing cavity is always constant.

[0013] In some embodiments, the coating die also includes a second die, which is connected to the first die, and the second die is provided with a second accommodating cavity and a second cooling cavity along its length direction, the second accommodating cavity is configured to accommodate the slurry, and the second cooling cavity is arranged at the outer edge of the second accommodating cavity to accommodate the cooling medium.

[0014] In the above-mentioned implementation process, the second die head is provided with a second accommodating cavity and a second cooling cavity. The second cooling cavity is located at the outer edge of the second accommodating cavity, so that when the second die head coats the electrode piece with the slurry accommodated in its second accommodating cavity, the temperature sensing component senses the temperature of the slurry. When the temperature of the slurry exceeds a preset value, the temperature sensing component feeds it back to the cooling component. The cooling component provides a cooling medium of corresponding pressure and temperature to the second cooling cavity according to the temperature at this time, so that the temperature in the second accommodating cavity is always constant, thereby ensuring the consistency of the slurry fluidity, thereby ensuring the consistency of the surface density and improving the quality of the electrode piece.

[0015] In some embodiments, the second cooling chamber includes a plurality of second cooling pipes, which are spaced apart in sequence along the thickness direction of the second die head, each of the second cooling pipes is configured with the cooling medium, and the opening direction of each of the second cooling pipes is consistent.

[0016] In the above implementation process, a plurality of second cooling pipes are configured, and the plurality of second cooling pipes are spaced apart along the thickness direction of the second die head, and each second cooling pipe contains a cooling medium, so that the temperature control structure can control the pressure and temperature of the cooling medium in each second cooling pipe according to the actual temperature of the slurry in the second containing cavity, thereby ensuring the flow consistency of the slurry in the second containing cavity, and thereby improving the consistency of the surface density.

[0017] In some embodiments, a plurality of the second cooling pipes are each provided with a second heat-insulating member on a side away from each other, so as to prevent energy loss and affect the cooling effect.

[0018] In some embodiments, the second cooling channel is provided with a second inlet and a second outlet, the second inlet and the second outlet are located on the same side of the second die head, and the depth of the second cooling channel on the side close to the second inlet is less than the depth on the side away from the second inlet, which is beneficial to cooling the slurry so that the temperature in the first containing cavity is always constant.

[0019] In a second aspect, the present application also provides a coating machine, comprising a coating device as described in any one of the above items.

[0020] Since the coating machine provided in the second aspect includes a coating device, the coating machine has all the technical effects of the coating device, which will not be described in detail here.

[0021] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a coating die head of a coating device provided in an embodiment of the present application;

[0025] Figure 2 An exploded schematic diagram of a coating die head of a coating device provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the structure of a first die head or a second die head of a coating device provided in an embodiment of the present application;

[0027] Figure 4 for Figure 3 A cross-sectional view of

[0028] Figure 5 A schematic diagram of the structure of a coating device provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of the structure of a temperature control device for a coating device provided in an embodiment of the present application.

[0030] Reference numerals

[0031] 100, coating die; 101, first die; 1011, first accommodating cavity; 1012, first cooling pipe; 102, second die; 1021, second accommodating cavity; 1022, second cooling pipe; 200, temperature control structure; 201, temperature sensing element; 202, cooling element. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0033] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0034] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0035] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0037] Example

[0038] During the design process, the inventor discovered that with the promotion and popularization of electric vehicles and hybrid vehicles, developing battery cells with long driving range and excellent safety performance has become a difficult problem for various companies. The coating process in the battery cell production process is a difficult point and process control point in the production process. In the coating process, the pole piece needs to be sprayed with slurry through the coating die head to produce the battery electrode. The coating die head is also the most precise part of the coater. The surface density of the coating affects the quality of the entire pole piece. If the slurry characteristics are known, the temperature affects the fluidity of the slurry. Inconsistent fluidity will cause inconsistent surface density during coating. In this regard, the present application scheme adds cooling to the coating die head to keep the coating die head at a constant temperature, thereby ensuring consistent slurry fluidity and surface density.

[0039] like Figure 1-Figure 6As shown, in the first aspect, an embodiment of the present application provides a coating device, comprising: a coating die 100, which is provided with a cavity and a cooling space, the cavity is configured to accommodate a slurry, the cooling space is configured to accommodate a cooling medium, and the cooling medium is configured to exchange heat with the cavity; a temperature control structure 200, which comprises a temperature sensing component 201 and a cooling component 202, the temperature sensing component 201 is connected to the coating die 100, and the cooling component 202 is connected to the temperature sensing component 201, so as to provide the cooling medium to the cooling space according to the temperature sensed by the temperature sensing component 201.

[0040] Exemplarily, the coating device is used to spray slurry onto the electrode, wherein the temperature sensing component 201 includes but is not limited to a temperature probe, the cooling component 202 includes but is not limited to a chiller, the cooling medium includes but is not limited to water, and the cooling component 202 is used to provide water with variable pressure and variable temperature to the cooling space so that the temperature in the cavity is always constant.

[0041] In the above-mentioned implementation process, the coating die 100 is configured with a cooling space, and the cooling space contains a cooling medium. The temperature sensing component 201 is configured on the coating die 100, so that when the coating die 100 coats the electrode with the slurry contained in its cavity, the temperature sensing component 201 senses the temperature of the slurry. When the temperature of the slurry exceeds a preset value, the temperature sensing component 201 feeds it back to the cooling component 202. The cooling component 202 provides a cooling medium with corresponding pressure and temperature to the cooling space according to the temperature at this time, so that the temperature in the cavity is always constant, thereby ensuring the consistency of the slurry fluidity, thereby ensuring the consistency of the surface density and improving the quality of the electrode.

[0042] like Figure 3 As shown, the coating die 100 includes a first die 101, and the first die 101 is provided with a first accommodating cavity 1011 and a first cooling cavity along its length direction. The first accommodating cavity 1011 is configured to accommodate the slurry, and the first cooling cavity is arranged at the outer edge of the first accommodating cavity 1011 to accommodate the cooling medium.

[0043] Exemplarily, the first die head 101 is configured to be distributed along the left-right direction, the first cooling cavity is densely distributed around the first accommodating cavity 1011, the first accommodating cavity 1011 includes but is not limited to a semi-cylindrical shape, and the first cooling cavity includes but is not limited to a serpentine shape, wherein in the left-right direction, the first cooling cavity can gradually increase the contact area with the first accommodating cavity 1011 according to actual conditions.

[0044] In the above-mentioned implementation process, the first die head 101 is configured with a first accommodating cavity 1011 and a first cooling cavity. The first cooling cavity is located at the outer edge of the first accommodating cavity 1011, so that when the first die head 101 coats the electrode with the slurry contained in its first accommodating cavity 1011, the temperature sensing component 201 senses the temperature of the slurry. When the temperature of the slurry exceeds a preset value, the temperature sensing component 201 feeds it back to the cooling component 202. The cooling component 202 provides a cooling medium with corresponding pressure and temperature to the first cooling cavity according to the temperature at this time, so that the temperature in the first accommodating cavity 1011 is always constant, thereby ensuring the consistency of the slurry fluidity, thereby ensuring the consistency of the surface density and improving the quality of the electrode.

[0045] like Figure 3 As shown, the first cooling chamber includes a plurality of first cooling pipes 1012, for example, three first cooling pipes 1012 are configured, and the plurality of first cooling pipes 1012 are distributed in sequence along the thickness direction of the first die head 101, that is, the diameters of the plurality of first cooling pipes 1012 gradually increase, each of the first cooling pipes 1012 is configured with the cooling medium, and the opening direction of each of the first cooling pipes 1012 is consistent.

[0046] In the above-mentioned implementation process, a plurality of first cooling pipes 1012 are configured, and the plurality of first cooling pipes 1012 are spaced apart along the thickness direction of the first die head 101, and each first cooling pipe 1012 contains a cooling medium, so that the temperature control structure 200 can control the pressure and temperature of the cooling medium in each first cooling pipe 1012 according to the actual temperature of the slurry in the first containing cavity 1011. For example, when the slurry temperature is above 23°, the temperature can be controlled according to the temperature to ensure the flow consistency of the slurry in the first containing cavity 1011, thereby improving the consistency of the surface density.

[0047] In some embodiments, a plurality of the first cooling pipes 1012 are each provided with a first heat-insulating member on a side away from each other, and the first heat-insulating member includes but is not limited to a heat-insulating material, which can prevent energy loss and affect the cooling effect.

[0048] like Figure 3-4 As shown, the first cooling channel 1012 is provided with a first inlet and a first outlet, for example, each of the first cooling channels 1012 is provided with two first inlets and two first outlets, the two first inlets are spaced apart, the two first outlets are spaced apart, the first inlet and the first outlet are located on the same side of the first die head 101, and the depth of the side of the first cooling channel 1012 close to the first inlet is less than the depth of the side away from the first inlet. This is beneficial to cooling the slurry, so that the temperature in the first accommodating cavity 1011 is always constant.

[0049] like Figure 3 As shown, the coating die 100 also includes a second die 102, which is connected to the first die 101. The second die 102 is provided with a second accommodating cavity 1021 and a second cooling cavity along its length direction. The second accommodating cavity 1021 is configured to accommodate the slurry, and the second cooling cavity is arranged at the outer edge of the second accommodating cavity 1021 to accommodate the cooling medium.

[0050] Exemplarily, the second die head 102 is configured to be distributed in the left-right direction, the second cooling cavity is densely distributed around the second accommodating cavity 1021, the second accommodating cavity 1021 includes but is not limited to a semi-cylindrical shape, and the second cooling cavity includes but is not limited to a serpentine shape, wherein in the left-right direction, the second cooling cavity can gradually increase the contact area with the second accommodating cavity 1021 according to actual conditions.

[0051] In the above-mentioned implementation process, the second die head 102 is configured with a second accommodating cavity 1021 and a second cooling cavity. The second cooling cavity is located at the outer edge of the second accommodating cavity 1021, so that when the second die head 102 coats the electrode with the slurry contained in its second accommodating cavity 1021, the temperature sensing component 201 senses the temperature of the slurry. When the temperature of the slurry exceeds a preset value, the temperature sensing component 201 feeds it back to the cooling component 202. The cooling component 202 provides a cooling medium with corresponding pressure and temperature to the second cooling cavity according to the temperature at this time, so that the temperature in the second accommodating cavity 1021 is always constant, thereby ensuring the consistency of the slurry fluidity, thereby ensuring the consistency of the surface density and improving the quality of the electrode.

[0052] Please refer to Figure 3 The second cooling chamber includes a plurality of second cooling pipes 1022, for example, three second cooling pipes 1022 are configured, and the plurality of second cooling pipes 1022 are distributed in sequence along the thickness direction of the second die head 102, that is, the diameters of the plurality of second cooling pipes 1022 gradually increase, each of the second cooling pipes 1022 is configured with the cooling medium, and the opening direction of each of the second cooling pipes 1022 is consistent.

[0053] In the above-mentioned implementation process, a plurality of second cooling pipes 1022 are configured, and the plurality of second cooling pipes 1022 are spaced apart along the thickness direction of the second die head 102, and each second cooling pipe 1022 contains a cooling medium, so that the temperature control structure 200 can control the pressure and temperature of the cooling medium in each second cooling pipe 1022 according to the actual temperature of the slurry in the second containing cavity 1021, thereby ensuring the flow consistency of the slurry in the second containing cavity 1021, and thereby improving the consistency of the surface density.

[0054] In some embodiments, a plurality of the second cooling pipes 1022 are each provided with a second heat-insulating member on a side away from each other, and the second heat-insulating member includes but is not limited to a heat-insulating material, which can prevent energy loss and affect the cooling effect.

[0055] like Figure 3-4 As shown, the second cooling channel 1022 is provided with a second inlet and a second outlet, for example, each second cooling channel 1022 is provided with two second inlets and two second outlets, the two second inlets are spaced apart, the two second outlets are spaced apart, the second inlet and the second outlet are located on the same side of the second die head 102, and the depth of the side of the second cooling channel 1022 close to the second inlet is less than the depth of the side away from the second inlet. This is beneficial to cooling the slurry so that the temperature in the first accommodating cavity 1011 is always constant.

[0056] In a second aspect, the present application also provides a coating machine, comprising the coating device as described above.

[0057] Since the coating machine provided in the second aspect includes a coating device, the coating machine has all the technical effects of the coating device, which will not be described in detail here.

[0058] In all the embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms are not elaborated in the embodiments of the present application.

[0059] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0060] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0061] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A coating device, characterized in that: include: A coating die head, which is provided with a cavity and a cooling space, wherein the cavity is configured to contain the slurry, the cooling space is configured to contain a cooling medium, and the cooling medium is configured to exchange heat with the cavity; The temperature control structure includes a temperature sensing component and a cooling component. The temperature sensing component is connected to the coating die head, and the cooling component is connected to the temperature sensing component to provide the cooling medium to the cooling space according to the temperature sensed by the temperature sensing component.

2. The coating device according to claim 1, characterized in that: The coating die head comprises a first die head, wherein the first die head is provided with a first accommodating cavity and a first cooling cavity along its length direction, wherein the first accommodating cavity is configured to accommodate the slurry, and the first cooling cavity is arranged at the outer edge of the first accommodating cavity to accommodate the cooling medium.

3. The coating device according to claim 2, characterized in that: The first cooling chamber includes a plurality of first cooling pipes, which are distributed in sequence along the thickness direction of the first die head at intervals, each of the first cooling pipes is configured with the cooling medium, and the opening direction of each of the first cooling pipes is consistent.

4. The coating device according to claim 3, characterized in that: A plurality of the first cooling pipes are each provided with a first heat-insulating component on one side away from each other.

5. The coating device according to claim 4, characterized in that: The first cooling channel is provided with a first inlet and a first outlet, the first inlet and the first outlet are located on the same side of the first die head, and the depth of the first cooling channel on a side close to the first inlet is smaller than the depth of the side away from the first inlet.

6. The coating device according to claim 2 or 5, characterized in that: The coating die also includes a second die, which is connected to the first die. The second die is provided with a second accommodating cavity and a second cooling cavity along its length. The second accommodating cavity is configured to accommodate the slurry, and the second cooling cavity is arranged at the outer edge of the second accommodating cavity to accommodate the cooling medium.

7. The coating device according to claim 6, characterized in that: The second cooling chamber includes a plurality of second cooling pipes, which are spaced apart in sequence along the thickness direction of the second die head, each of the second cooling pipes is configured with the cooling medium, and the opening direction of each of the second cooling pipes is consistent.

8. The coating device according to claim 7, characterized in that: A plurality of the second cooling pipes are each provided with a second heat-insulating member on one side away from each other.

9. The coating device according to claim 8, characterized in that: The second cooling channel is provided with a second inlet and a second outlet, the second inlet and the second outlet are located on the same side of the second die head, and the depth of the second cooling channel on the side close to the second inlet is smaller than the depth of the side away from the second inlet.

10. A coating machine, characterized in that: Comprising a coating device as described in any one of claims 1-9.

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