Continuously adjustable lithium battery coating die head

Abstract

The utility model relates to a continuously adjustable lithium battery coating die head. The die head comprises an ellipsoid spoiler adopting a reducing short shaft, a die head cavity, an angle regulator, a die head inlet and a die head outlet, the spheroid spoiler is arranged in the die head cavity, one end of a long shaft of the spheroid spoiler is in sealed connection with a first side wall of the die head cavity through a sealing ring, the other end of the long shaft of the spheroid spoiler is in sealed connection with a second side wall of the die head cavity through a sealing ring, and the first side wall and the second side wall are oppositely arranged. A third side wall of the die head cavity is provided with a die head outlet, a fourth side wall of the die head cavity is provided with a die head inlet, gaps exist between the ellipsoid spoiler and the third side wall and the fourth side wall in the die head cavity, and the angle adjuster penetrates through the first side wall of the die head cavity to be fixedly connected with one end of a long shaft of the ellipsoid spoiler. And the change of the head-on angle between the ellipsoid spoiler and the inlet of the die head is adjusted through the angle adjuster. Therefore, the speed uniformity of the die head outlet slurry is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the new energy technology field, in particular to a continuously adjustable lithium battery coating die. BACKGROUND

[0002] With the development of society, new energy vehicles have become the main trend of future vehicle development due to good driving comfort, higher efficiency, energy saving and environmental protection and other characteristics, and lithium ion power batteries used by new energy vehicles have also become a hot spot.

[0003] In the manufacturing process of lithium ion power batteries, an important process is pole piece coating, which is a process of uniformly coating the uniformly stirred slurry on the current collector and drying the organic solvent in the slurry. The coating effect has an important influence on the battery capacity, internal resistance, cycle life and safety, and uniform coating of the pole piece has an important influence on the performance of the lithium ion battery.

[0004] However, the current coating die has poor uniformity of the surface density of the coated pole piece.

[0005] Utility model

[0006] Therefore, it is necessary to provide a continuously adjustable lithium battery coating die capable of improving the uniformity of the surface density of the coated pole piece.

[0007] A continuously adjustable lithium battery coating die, the die comprises an ellipsoidal spoiler, a die cavity, an angle adjuster, a die inlet and a die outlet.

[0008] The ellipsoidal spoiler is arranged in the die cavity, one end of the long axis of the ellipsoidal spoiler is sealingly connected to the first side wall of the die cavity through a sealing ring, the other end of the long axis of the ellipsoidal spoiler is sealingly connected to the second side wall of the die cavity through a sealing ring, the first side wall and the second side wall are oppositely arranged, the die outlet is arranged on the third side wall of the die cavity, the die inlet is arranged on the fourth side wall of the die cavity, and a gap exists between the ellipsoidal spoiler and the third side wall and the fourth side wall in the die cavity. The angle adjuster is fixedly connected to one end of the long axis of the ellipsoidal spoiler through the first side wall of the die cavity, and the angle of the ellipsoidal spoiler and the die inlet is adjusted by the angle adjuster.

[0009] The continuous adjustable lithium battery coating die comprises an ellipsoid flow disturbing member with a variable-diameter short shaft, a die cavity, an angle adjuster, a die inlet and a die outlet; the ellipsoid flow disturbing member is arranged in the die cavity, one end of the long shaft of the ellipsoid flow disturbing member is sealingly connected to a first side wall of the die cavity through a sealing ring, the other end of the long shaft of the ellipsoid flow disturbing member is sealingly connected to a second side wall of the die cavity through a sealing ring, the first side wall is oppositely arranged to the second side wall, the die outlet is arranged on a third side wall of the die cavity, the die inlet is arranged on a fourth side wall of the die cavity, there is a gap between the ellipsoid flow disturbing member and the third and fourth side walls in the die cavity, and the angle adjuster is fixedly connected to one end of the long shaft of the ellipsoid flow disturbing member through the first side wall of the die cavity; the angle of the ellipsoid flow disturbing member with respect to the die inlet is adjusted through the angle adjuster. By changing the angle of the ellipsoid flow disturbing member with respect to the die inlet, different flow disturbing structures in the die cavity can be changed, different flow processes of the slurry in the die can be realized, the uniformity of the surface density of the coated pole piece can be well improved, and the uniformity of the slurry speed at the die outlet can be improved.

[0010] In one embodiment, the ratio of the longest short shaft diameter to the shortest short shaft diameter of the ellipsoid flow disturbing member is 4:1.

[0011] In one embodiment, the die cavity is a semi-cylindrical cavity structure.

[0012] In one embodiment, the third side wall and the fourth side wall of the die cavity are movably connected, the third side wall is opened or closed with respect to the fourth side wall, when the third side wall is opened with respect to the fourth side wall, the die cavity is an open-end cavity, and when the third side wall is closed with respect to the fourth side wall, the die cavity is a closed cavity.

[0013] Advantages:

[0014] 1. By changing the angle of the ellipsoid flow disturbing member with respect to the die inlet, different flow disturbing structures in the die cavity can be changed, different flow processes of the slurry in the die can be realized, the uniformity of the surface density of the coated pole piece can be well improved, and the uniformity of the slurry speed at the die outlet can be improved.

[0015] 2. By opening the third side wall, the ellipsoid flow disturbing member is arranged in the die cavity and sealingly connected to the first and second side walls of the die cavity through sealing rings, in the use process, when a fault occurs, the inside of the die cavity can be viewed by opening the third side wall. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a three-dimensional perspective view of the continuous adjustable lithium battery coating die in one embodiment.

[0017] Fig. 2 A cross-sectional view of the continuously adjustable lithium battery coating die in the horizontal direction when the ellipsoidal spoiler is located at one of the angles in one embodiment;

[0018] Fig. 3 A cross-sectional view of the continuously adjustable lithium battery coating die in the horizontal direction when the ellipsoidal spoiler is located at the other angle in one embodiment. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0020] In one embodiment, as shown in Figs. 1-3 A continuously adjustable lithium battery coating die is provided, which includes an ellipsoidal spoiler 1 with a variable diameter minor axis, a die cavity 2, an angle adjuster 3, a die inlet 4 and a die outlet 5. The ellipsoidal spoiler 1 is placed in the die cavity 2, one end of the major axis of the ellipsoidal spoiler 1 is sealingly connected to the first side wall of the die cavity 2 through a sealing ring 6, the other end of the major axis of the ellipsoidal spoiler 1 is sealingly connected to the second side wall of the die cavity 2 through a sealing ring 6, the first side wall and the second side wall are oppositely arranged, the die outlet 5 is arranged on the third side wall of the die cavity 2, the die inlet 4 is arranged on the fourth side wall of the die cavity 2, there is a gap between the ellipsoidal spoiler 1 and the third side wall and the fourth side wall in the die cavity 2, the angle adjuster 3 is fixedly connected to one end of the major axis of the ellipsoidal spoiler 1 through the first side wall of the die cavity 2, and the angle of the ellipsoidal spoiler 1 with respect to the die inlet 4 is adjusted by the angle adjuster 3.

[0021] The angle adjuster 3 is directly connected to the ellipsoidal spoiler 1, and the continuous adjustment of the angle adjuster 3 can continuously change the angle of the ellipsoidal spoiler 1 with respect to the die inlet 4, so that the uniformity of the slurry speed at the die outlet 5 can be achieved by adjusting the angle under different slurry flow conditions.

[0022] The inlet and outlet of the die are on the side of the cavity, i.e. the fourth side wall and the third side wall.

[0023] The diameter of the minor axis of the ellipsoidal spoiler 1 can gradually increase around the major axis and then gradually decrease to form an oval shape, and the ratio of the longest minor axis diameter to the shortest minor axis diameter of the ellipsoidal spoiler 1 can be 4:1, 3:1 or other ratios.

[0024] It should be understood that the continuously adjustable lithium battery coating die can well improve the uniformity of the coated electrode surface density, and can realize uniform adjustment of the corresponding outlet speed for different slurry flow, which has reference significance for the improvement of the battery coating process.

[0025] In one embodiment, the ratio of the longest minor axis diameter to the shortest minor axis diameter of the ellipsoidal spoiler 1 is 4:1.

[0026] In one embodiment, the ratio of the longest minor axis diameter to the shortest minor axis diameter of the ellipsoidal spoiler 1 is 4:1.

[0027] In one embodiment, the die cavity 2 is a semi-cylindrical cavity structure.

[0028] In one embodiment, the third side wall of the die cavity 2 is movably connected between the third side wall and the fourth side wall, and the third side wall is opened or closed relative to the fourth side wall. When the third side wall is opened relative to the fourth side wall, the die cavity 2 is an open-ended cavity. When the third side wall is closed relative to the fourth side wall, the die cavity 2 is a closed cavity.

[0029] It should be understood that the ellipsoidal spoiler 1 can be placed in the die cavity 2 by opening the third side wall and sealingly connected with the first and second side walls of the die cavity 2 by the sealing ring 6. In the event of a failure during use, the third side wall can be opened to check the internal condition of the die cavity 2.

[0030] The continuous adjustable lithium battery coating die comprises an ellipsoidal disturbance member 1 with a variable diameter short axis, a die cavity 2, an angle adjuster 3, a die inlet 4 and a die outlet 5; the ellipsoidal disturbance member 1 is arranged in the die cavity 2, one end of the long axis of the ellipsoidal disturbance member 1 is sealingly connected with a first side wall of the die cavity 2 through a sealing ring 6, the other end of the long axis of the ellipsoidal disturbance member 1 is sealingly connected with a second side wall of the die cavity 2 through a sealing ring 6, the first side wall and the second side wall are oppositely arranged, the die outlet 5 is arranged on a third side wall of the die cavity 2, the die inlet 4 is arranged on a fourth side wall of the die cavity 2, there is a gap between the ellipsoidal disturbance member 1 and the third side wall and the fourth side wall in the die cavity 2, the angle adjuster 3 is fixedly connected with one end of the long axis of the ellipsoidal disturbance member 1 through the first side wall of the die cavity 2, and the angle of the ellipsoidal disturbance member 1 and the die inlet 4 is adjusted through the angle adjuster 3. By changing the angle of the ellipsoidal disturbance member 1 and the die inlet 4, different disturbance structures in the die cavity 2 can be changed, different flow processes of the slurry in the die can be realized, the uniformity of the coated electrode surface density of the coating die can be improved, and the uniformity of the slurry speed of the die outlet 5 can be improved.

[0031] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0032] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A continuously adjustable lithium battery coating die head, characterized in that: The die head comprises: an ellipsoidal spoiler with a variable diameter short axis, a die head cavity, an angle adjuster, a die head inlet and a die head outlet; The ellipsoidal spoiler is placed in the die head cavity, one end of the long axis of the ellipsoidal spoiler is sealed with the first side wall of the die head cavity through a sealing ring, the other end of the long axis of the ellipsoidal spoiler is sealed with the second side wall of the die head cavity through a sealing ring, the first side wall and the second side wall are arranged opposite to each other, the third side wall of the die head cavity is provided with a die head outlet, and the fourth side wall of the die head cavity is provided with a die head inlet, there is a gap between the ellipsoidal spoiler and the third and fourth side walls in the die head cavity, the angle adjuster passes through the first side wall of the die head cavity and is fixedly connected to one end of the long axis of the ellipsoidal spoiler, and the change of the head-on angle between the ellipsoidal spoiler and the die head inlet is adjusted by the angle adjuster.

2. The die head according to claim 1, characterized in that The ratio of the longest minor axis diameter to the shortest minor axis diameter of the ellipsoidal spoiler is 4:

1.

3. The die head according to claim 1, characterized in that The die head cavity is a semi-cylindrical cavity structure.

4. The die head according to claim 1, characterized in that The third side wall and the fourth side wall of the die head cavity are movably connected, and the third side wall is opened or closed relative to the fourth side wall. When the third side wall is opened relative to the fourth side wall, the die head cavity is a cavity with an open upper end; when the third side wall is closed relative to the fourth side wall, the die head cavity is a closed cavity.

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