Coating die head and coating system

Abstract

The utility model relates to the technical field of lithium battery coating equipment, in particular to a coating die head and a coating system. The utility model provides a coating die head. The coating die head comprises a die head main body, a die cavity is formed in the die head main body, a plurality of independently arranged feeding holes are formed in the die head main body, and each feeding hole is communicated with the die cavity; a temperature adjusting mechanism is arranged in the die head body and used for adjusting the temperature in the die cavity. By arranging a plurality of independently arranged feeding holes, the uniformity of the feeding temperature can be ensured, and the heat loss in the slurry conveying process is reduced; and the temperature adjusting mechanism is arranged in the die head main body, so that the temperature of the slurry in the die cavity can be adjusted, and the flowability of the high-solid-content slurry is improved. The multiple independent feeding holes are formed to be matched with the temperature adjusting mechanism on the die head body, the problem that the fluidity of solid content slurry is poor is solved, and the coating quality can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery coating equipment, in particular to a coating die head and a coating system. Background Art

[0002] Coating is one of the key processes in the production of lithium batteries. Its main purpose is to evenly coat the slurry with good stability, viscosity and fluidity on the current collector.

[0003] When preparing the slurry for coating, the higher the content of active substances in the slurry, the thicker the coating on the current collector. Studies have found that when the coating thickness is constant, increasing the solid content in the slurry can shorten the time required to enter the oven, shorten the oven length, and reduce energy consumption. However, the slurry with a high solid content has poor fluidity at room temperature, resulting in poor coating effect.

[0004] Therefore, the present application provides a coating die and a coating system for improving the coating effect while increasing the solid content. Utility Model Content

[0005] The main purpose of the utility model is to provide a coating die head to achieve the purpose of improving the coating effect while increasing the solid content of the slurry; the utility model also provides a coating system for protecting the coating die head.

[0006] To achieve the above-mentioned purpose, the present invention provides a coating die head in one embodiment, including: a die head body;

[0007] A mold cavity is formed in the die body, and a plurality of independently arranged feed holes are provided on the die body, and each of the feed holes is connected to the mold cavity;

[0008] A temperature regulating mechanism is arranged in the die head body, and the temperature regulating mechanism is used to regulate the temperature in the die cavity.

[0009] Furthermore, the mold cavity extends along the length direction of the die body, and all the feed holes are arranged on the die body at intervals along the extension direction of the mold cavity.

[0010] Furthermore, three feed holes are provided.

[0011] Furthermore, it also includes a flow regulating member;

[0012] Each of the feed holes is provided with a flow regulating member, and the flow regulating member is used to regulate the feed flow of the corresponding feed hole.

[0013] Furthermore, it also includes a temperature detection component;

[0014] The temperature detection component is arranged on the die head body and is used to detect the temperature information of the slurry in the mold cavity.

[0015] Furthermore, the temperature regulating mechanism is an electric heating tube arranged in the die body.

[0016] Furthermore, it also includes a controller;

[0017] The controller is electrically connected to the temperature detection component and the electric heating tube, and the controller controls the heating temperature of the electric heating tube according to the temperature information of the slurry in the mold cavity measured by the temperature detection component.

[0018] Furthermore, the temperature regulating mechanism is a flow channel opened on the die body, and the flow channel can be connected to a heat source, and heat medium circulates into the flow channel through the heat source.

[0019] Further, the die body includes an upper die and a lower die;

[0020] The upper die head is connected to the lower die head, the die cavity is provided on the lower die head, and a coating slit communicating with the die cavity is formed between the upper die head and the lower die head;

[0021] The lower die head is provided with the feed hole, and the upper die head and the lower die head are both provided with the temperature regulating mechanism.

[0022] Another aspect of the present invention is to provide a coating system, including the coating die head provided in any of the above embodiments.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides a coating die head, comprising: a die head body; a die cavity is formed in the die head body, a plurality of independently arranged feed holes are provided on the die head body, and each of the feed holes is connected to the die cavity; a temperature regulating mechanism is arranged in the die head body, and the temperature regulating mechanism is used to regulate the temperature in the die cavity.

[0025] By setting up multiple independent feed holes, the uniformity of feed temperature can be ensured and the heat loss of slurry can be reduced; and by setting up a temperature regulating mechanism in the die body, the temperature of the slurry in the mold cavity can be adjusted, thereby improving the fluidity of high solid content slurry. By setting up multiple independent feed holes and cooperating with the temperature regulating mechanism on the die body, the problem of poor fluidity of solid content slurry is solved, and the coating quality can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a coating die head provided in an embodiment of the utility model;

[0028] Figure 2 A cross-sectional view of a coating die head provided in an embodiment of the utility model;

[0029] Figure 3 A schematic structural diagram of a coating system provided in an embodiment of the utility model.

[0030] Icons: 1-die body; 11-upper die; 12-lower die; 121-feed hole; 122-die cavity; 13-flow channel; 14-flow regulating part;

[0031] 2-Mold temperature controller. DETAILED DESCRIPTION

[0032] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] like Figures 1 to 3 As shown, one embodiment of the utility model provides a coating die, comprising: a die body 1; a die cavity 122 is formed in the die body 1, and a plurality of independently arranged feed holes 121 are provided on the die body 1, and each of the feed holes 121 is connected to the die cavity 122; a temperature regulating mechanism is provided in the die body 1, and the temperature regulating mechanism is used to regulate the temperature in the die cavity 122.

[0034] The coating die provided in this embodiment includes a die body 1, which is used to coat the slurry onto the substrate. A mold cavity 122 for accommodating the slurry is formed in the die body 1, and a plurality of feed holes 121 are provided on the die body 1, through which the external slurry can be transported to the mold cavity 122; each feed hole 121 is independently arranged, that is, the transport paths of each feed hole 121 do not interfere with each other, and the slurry can only be gathered in the mold cavity 122. By providing a plurality of feed holes 121 on the die body 1, the uniformity of the feed temperature can be ensured. A temperature regulating mechanism is also provided in the die body 1, and the temperature regulating mechanism is used to adjust the temperature in the mold cavity 122, so that the temperature of the slurry in the mold cavity 122 can be adjusted.

[0035] The coating die head provided in this embodiment can ensure the uniformity of the feed temperature and reduce the heat loss of the slurry by providing a plurality of independently provided feed holes 121; and by providing a temperature regulating mechanism in the die head body 1, the temperature of the slurry in the mold cavity 122 can be adjusted, thereby improving the fluidity of the high solid content slurry. By providing a plurality of independently provided feed holes 121 in conjunction with the temperature regulating mechanism on the die head body 1, the problem of poor fluidity of the solid content slurry is solved, and the coating quality can be improved.

[0036] The coating die head provided in the embodiment of the utility model is as follows Figures 1 to 3 As shown, the mold cavity 122 extends along the length direction of the die body 1 , and all the feed holes 121 are arranged on the die body 1 at intervals along the extension direction of the mold cavity 122 .

[0037] In this embodiment, in order to match the substrate, the mold cavity 122 is in an elongated strip shape so as to cover the substrate. Preferably, in order to improve the temperature uniformity when the slurry is fed, all the feed holes 121 are arranged at intervals along the extension direction of the mold cavity 122 .

[0038] The coating die head provided in the embodiment of the utility model is as follows Figures 1 to 3 As shown, three feed holes 121 are provided.

[0039] Preferably, in this embodiment, three feed holes 121 are provided, so that the temperature uniformity of the slurry during feeding can be ensured while controlling the cost.

[0040] Furthermore, in this embodiment, three feed holes 121 are arranged at intervals, the middle feed hole 121 is arranged at the midpoint of the length direction of the mold cavity 122 , and the other two feed holes 121 are arranged symmetrically about this feed hole 121 .

[0041] It can be understood that, in the present embodiment, the feed holes 121 can also be set to two or five, etc., which can be specifically set according to parameters such as the size of the die body 1 and the volume of the cavity 122, which can achieve the purpose of ensuring the uniformity of the slurry feed temperature in the present embodiment.

[0042] The coating die head provided in the embodiment of the utility model is as follows Figures 1 to 3 As shown, a flow regulating member 14 is also included; each of the feed holes 121 is provided with the flow regulating member 14 , and the flow regulating member is used to regulate the feed flow of the corresponding feed hole 121 .

[0043] In this embodiment, each feed hole 121 is provided with a flow regulator 14, which is used to adjust the feed flow of the corresponding feed hole 121 so that each feed hole 121 can be evenly diverted, thereby improving the uniformity of coating and greatly improving the coating effect.

[0044] Optionally, in this embodiment, the flow regulating member 14 is a valve, such as a solenoid valve, an electrically controlled gate valve or a butterfly valve.

[0045] The coating die head provided in the embodiment of the utility model is as follows Figures 1 to 3 As shown, it also includes a temperature detection component; the temperature detection component is arranged on the die head body 1 and is used to detect the temperature information of the slurry in the mold cavity 122.

[0046] In this embodiment, the coating die head also includes a temperature detection member for real-time detection of the temperature of the slurry in the mold cavity 122. The temperature detection member can be a temperature sensor, such as a thermistor, or a thermometer. By setting the temperature detection member, the temperature information of the slurry in the mold cavity 122 can be obtained in real time, so that the temperature of the temperature regulating mechanism can be adjusted in time according to the temperature of the slurry in the mold cavity 122, so that the temperature of the slurry in the mold cavity 122 always meets the preset requirements, thereby improving the fluidity of the slurry. By setting the temperature detection member, the temperature control capability of the coating die head can be greatly improved, and the coating quality can be improved.

[0047] The coating die head provided in the embodiment of the utility model is as follows Figures 1 to 3 As shown, the temperature regulating mechanism is an electric heating tube arranged in the die body 1.

[0048] Optionally, in this embodiment, the temperature adjustment mechanism can be an electric heating tube arranged in the die body 1, which has a simple structure and a faster temperature adjustment response.

[0049] In this embodiment, a mounting hole for mounting an electric heating tube is provided in the die body 1, and the electric heating tube is mounted in the mounting hole. The die body 1 is heated by the electric heating tube, and the heat can be transferred to the mold cavity 122, thereby heating the slurry in the mold cavity 122, improving the fluidity of the slurry, and improving the coating effect of the coating die.

[0050] The coating die head provided in the embodiment of the utility model also includes a controller; the controller is electrically connected to the temperature detection component and the electric heating tube, and the controller controls the heating temperature of the electric heating tube according to the temperature information of the slurry in the mold cavity 122 measured by the temperature detection component.

[0051] In this embodiment, the coating die head further includes a controller, which may be a PCB (Printed Circuit Board) or a CPU (Central Processing Unit) or the like.

[0052] When in use, the temperature detection element and the electric heating tube are both electrically connected to the controller. The temperature information of the slurry in the mold cavity 122 measured by the temperature detection element can be transmitted to the controller. The controller compares the temperature information transmitted by the temperature detection element with the preset temperature. When the temperature information transmitted by the temperature detection element is higher than the preset temperature, the controller controls the temperature of the electric heating tube to decrease. When the temperature information transmitted by the temperature detection element is lower than the preset value, the controller controls the temperature of the electric heating tube to increase.

[0053] In this embodiment, the controller cooperates with the temperature detection component to automatically adjust the heating temperature of the electric heating tube without manual intervention, which is more efficient, can reduce labor costs, and is convenient for operators.

[0054] The coating die head provided in the embodiment of the utility model is as follows Figures 1 to 3 As shown, the temperature regulating mechanism is a flow channel 13 opened on the die body 1, and the flow channel 13 can be connected to a heat source, and heat medium circulates into the flow channel 13 through the heat source.

[0055] Optionally, in this embodiment, the temperature regulating mechanism may also be a flow channel 13 provided on the die body 1, and the flow channel 13 may be formed by providing a through hole on the die body 1. When in use, the heat source is connected to the flow channel 13, and a heat medium is introduced into the flow channel 13 through the heat source, so that the heat medium can heat the die body 1, and the heat can be transferred to the mold cavity 122, so that the slurry in the mold cavity 122 can be heated, thereby improving the fluidity of the slurry and improving the coating effect.

[0056] Moreover, in this embodiment, the heat source can circulate heat medium into the flow channel 13, that is, the flow channel 13 has an inlet and an outlet, and the heat medium enters the flow channel 13 through the inlet and flows toward the outlet. After the heat medium completes the heat exchange in the flow channel 13, it leaves the flow channel 13 through the outlet and flows back to the heat source to realize circulation. By circulating the heat medium in the flow channel 13, the heating effect can be improved, ensuring that the slurry in the mold cavity 122 can meet expectations and improving the coating effect.

[0057] The coating die head provided in the embodiment of the utility model is as follows Figures 1 to 3 As shown, the die body 1 includes an upper die 11 and a lower die 12; the upper die 11 and the lower die 12 are connected, the die cavity 122 is arranged on the lower die 12, and a coating slit connected to the die cavity 122 is formed between the upper die 11 and the lower die 12; the lower die 12 is provided with the feed hole 121, and the upper die 11 and the lower die 12 are both provided with the temperature regulating mechanism.

[0058] In this embodiment, the die body 1 includes an upper die 11 and a lower die 12; the upper die 11 and the lower die 12 are detachably connected, and a groove structure is provided on the lower die 12. When the upper die 11 and the lower die 12 are connected, the groove structure forms the above-mentioned mold cavity 122. The die body 1 has a coating slit, and the mold cavity 122 is connected to the coating slit, and the slurry in the mold cavity 122 is sprayed onto the substrate through the coating slit.

[0059] In this embodiment, the die body 1 also includes a gasket. When the upper die 11 is connected to the lower die 12, the gasket is arranged between the upper die 11 and the lower die 12, and the coating slit is surrounded by the upper die 11, the lower die 12 and the gasket.

[0060] Further, in this embodiment, the feed holes 121 connected to the mold cavity 122 are all opened on the lower die head 12 to simplify the structure of the die body 1. Optionally, opening the feed hole 121 on the upper die head 11 can also achieve the connection between the feed hole 121 and the mold cavity 122, but it will cause the structure of the die body 1 to be complicated. Therefore, in this embodiment, it is preferred to open the feed hole 121 on the lower die head 12.

[0061] In this embodiment, in order to improve the temperature regulating effect of the temperature regulating mechanism, the above-mentioned temperature regulating mechanism is provided on both the upper die head 11 and the lower die head 12 .

[0062] Specifically, in this embodiment, when the temperature regulating mechanism is an electric heating tube, the upper die head 11 and the lower die head 12 are both provided with mounting holes for installing the electric heating tube. The electric heating tube is installed in the corresponding mounting hole. The die head body 1 is heated by the heat generated by the electric heating tube, and the heat is finally transferred to the mold cavity 122 to heat the slurry in the mold cavity 122.

[0063] When the temperature regulating mechanism is a flow channel 13, the flow channel 13 is provided on both the upper die head 11 and the lower die head 12, that is, heat medium circulates in both the upper die head 11 and the lower die head 12. By circulating the heat medium in the upper die head 11 and the lower die head 12, the heat medium raises the slurry in the mold cavity 122 to a preset temperature by heat exchange.

[0064] Another embodiment of the present invention further provides a coating system, comprising the coating die head described in any of the above embodiments.

[0065] The coating system adopts the above die head, which can achieve high-temperature coating, thereby solving the problem of poor coating quality caused by poor fluidity of high-solid content slurry.

[0066] Optionally, in this embodiment, when the temperature regulating mechanism is a flow channel 13 provided on the die body 1, the coating system further comprises a mold temperature controller 2. The mold temperature controller 2 is provided beside the coating die, and the mold temperature controller 2 is connected to the flow channel 13 on the die body 1, and can circulate heat medium into the flow channel 13. The die body 1 is heated so that the slurry in the mold cavity 122 can be raised to a preset temperature. The heat medium can be hot water, grease, or air.

[0067] Optionally, in this embodiment, the coating system further includes a control system. The control system is electrically connected to the temperature detection element, and the detection information of the temperature detection element can be transmitted to the control system, and the control system can control the temperature and flow rate of the heat medium leading to the flow channel 13 according to the detection information of the temperature detection element, so as to adjust the temperature of the die body 1 and ensure that the temperature of the slurry in the mold cavity 122 can meet expectations.

[0068] Specifically, in this embodiment, a preset temperature of the slurry is preset in the control system. During the coating process, when the temperature detection component detects that the temperature of the slurry in the mold cavity 122 is lower than the preset temperature, the temperature of the slurry in the mold cavity 122 can be increased by increasing the heat medium flow rate, or by increasing the heat medium temperature, or by a combination of the above two methods to improve the fluidity of the slurry in the mold cavity 122; and when the temperature detection component detects that the temperature of the slurry in the mold cavity 122 is lower than the preset temperature, the temperature of the slurry in the mold cavity 122 can be reduced by reducing the heat medium flow rate, or by reducing the heat medium temperature, or by a combination of the above two methods, so that the temperature of the slurry in the mold cavity 122 can meet the preset temperature.

[0069] In this embodiment, the control system cooperates with the temperature detection element to realize automatic adjustment of the slurry temperature and realize closed-loop adjustment of the slurry temperature without manual intervention, which is more efficient, reduces labor costs, and facilitates operation for operators.

[0070] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0071] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coating die head, characterized in that: include: Die body (1); A mold cavity (122) is formed in the die body (1), and a plurality of independently arranged feed holes (121) are provided on the die body (1), and each of the feed holes (121) is connected to the mold cavity (122); A temperature regulating mechanism is provided inside the die body (1), and the temperature regulating mechanism is used to regulate the temperature inside the die cavity (122).

2. The coating die head according to claim 1, characterized in that: The mold cavity (122) extends along the length direction of the die body (1), and all the feed holes (121) are arranged on the die body (1) at intervals along the extension direction of the mold cavity (122).

3. The coating die head according to claim 1 or 2, characterized in that: Three feeding holes (121) are provided.

4. The coating die head according to claim 1 or 2, characterized in that: Also includes a flow regulating member (14); The flow regulating member (14) is provided at each of the feed holes (121), and the flow regulating member is used to regulate the feed flow of the corresponding feed hole (121).

5. The coating die head according to claim 1, characterized in that: Also includes a temperature detection component; The temperature detection component is arranged on the die head body (1) and is used to detect the temperature information of the slurry in the die cavity (122).

6. The coating die head according to claim 5, characterized in that: The temperature regulating mechanism is an electric heating tube arranged in the die head body (1).

7. The coating die head according to claim 6, characterized in that: Also includes a controller; The controller is electrically connected to the temperature detection component and the electric heating tube, and the controller controls the heating temperature of the electric heating tube according to the temperature information of the slurry in the mold cavity (122) measured by the temperature detection component.

8. The coating die head according to claim 1 or 5, characterized in that: The temperature regulating mechanism is a flow channel (13) provided on the die body (1); the flow channel (13) can be connected to a heat source, and a heat medium can circulate into the flow channel (13) through the heat source.

9. The coating die head according to claim 1, characterized in that: The die body (1) comprises an upper die (11) and a lower die (12); The upper die head (11) is connected to the lower die head (12), the die cavity (122) is arranged on the lower die head (12), and a coating slit communicating with the die cavity (122) is formed between the upper die head (11) and the lower die head (12); The lower die head (12) is provided with the feed hole (121), and the upper die head (11) and the lower die head (12) are both provided with the temperature regulating mechanism.

10. A coating system, characterized in that: Comprising the coating die head according to any one of claims 1 to 9.

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