Three-layer die head structure for coating lithium battery

Abstract

The utility model discloses a three-layer die head structure for coating a lithium battery, which comprises a first die head, a second die head arranged on one side of the first die head, a first cavity formed between the first die head and the second die head, a third die head arranged on one side of the second die head far away from the first die head, and a second cavity formed between the second die head and the third die head. A fourth die head is arranged on the side, away from the second die head, of the third die head, and a third cavity is formed between the third die head and the fourth die head; the fixing assembly is used for fixing the first die head, the second die head, the third die head and the fourth die head in pairs; the number of the overturning assemblies is two, the overturning assemblies are arranged among the first die head, the second die head, the third die head and the fourth die head correspondingly, and the overturning assemblies are used for online die overturning; and the adjusting assembly is used for adjusting the overturning angle, and a group of die heads IV are additionally arranged on one side of the die head III to form three cavities, so that three layers of dissimilar slurry can be sprayed out, and the conductivity of the battery is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery coating, in particular to a three-layer die head structure for lithium battery coating. Background Art

[0002] Lithium battery coating is an important process in the manufacturing process of lithium batteries, which involves the quality and performance of the pole piece. The coating process mainly involves coating a slurry containing active materials, conductive agents, binders and solvents on metal foil to form a uniform coating, which is then dried, compacted and processed to form a pole piece.

[0003] The key component of the coating process is the coating die, which determines the thickness, uniformity and defects of the coating. The external structural design of the coating die mainly includes the geometric parameters of the die cavity, slit, lip, etc., as well as the process parameters such as the relative position and movement speed between the die and the substrate. The external structural design of the coating die needs to consider the fluid properties of the slurry, such as viscosity, density, surface tension, etc., as well as the requirements of the coating, such as coating thickness, coating width, coating uniformity, etc.

[0004] At present, the lithium battery coating process mainly adopts slot coating, that is, the slurry is squeezed out through a coating head with a special flow channel and coated on the moving substrate. Slot coating has the advantages of uniform coating thickness, few coating defects, and high coating quality, and is suitable for high-speed and high-precision coating.

[0005] At present, the commonly used slot extrusion coating die in the industry is a double-layer coating die, that is, two slots are set inside a die to coat the positive and negative electrode slurries respectively, and then the two layers of slurry are merged together to form a double-layer coating. The advantage of the double-layer coating die is that it can save space and cost, improve production efficiency, and at the same time achieve consistency and symmetry of the coating, which is beneficial to the balanced performance of the battery. However, the double-layer coating die also has some disadvantages, such as the coating thickness is limited, and it can only be coated to a certain thickness. It is difficult to achieve a thicker double-layer coating, because the gravity, surface tension, and viscosity of the coating will affect the stability and quality of the coating, and it is easy to produce defects such as separation, sag, and water choking of the coating. Therefore, for the battery industry, how to achieve a thicker coating is a technical problem that needs to be faced.

[0006] To this end, we propose a three-layer die structure for lithium battery coating. Utility Model Content

[0007] The purpose of the utility model is to provide a three-layer die head structure for lithium battery coating to solve the problems raised in the above background technology. To achieve the above purpose, the utility model provides the following technical solutions: a three-layer die head structure for lithium battery coating, comprising:

[0008] Die head one, die head two is arranged on one side of die head one, cavity one is formed between die head one and die head two, die head three is arranged on the side of die head two away from die head one, cavity two is formed between die head two and die head three, die head four is arranged on the side of die head three away from die head two, cavity three is formed between die head three and die head four;

[0009] A fixing assembly, wherein the fixing assembly is used to fix die head 1, die head 2, die head 3 and die head 4 in pairs;

[0010] A flip assembly, wherein there are two groups of flip assemblies, and the flip assemblies are respectively arranged between die head 1, die head 2, die head 3 and die head 4, and the flip assemblies are used for online mold flipping;

[0011] An adjusting component is used to adjust the flipping angle.

[0012] Preferably, the fixing assembly further comprises fixing plates, and there are two groups of fixing plates, one group of fixing plates is arranged between die head one and die head two, and the other group of fixing plates is arranged between die head three and die head four.

[0013] Preferably, an L-shaped plate is provided between the second die head and the third die head, and bolts are connected between the L-shaped plate and the second die head and the third die head.

[0014] Preferably, the flip assembly also includes a connecting plate 1, a connecting plate 2 is hinged on one side of the connecting plate 1, and the connecting plate 1 and the connecting plate 2 are fixedly connected to the die head 1 and the die head 2 respectively, and the connecting plate 2 is hinged on the side away from the connecting plate 1 to the connecting plate 3, and the connecting plate 3 is fixedly connected to the die head 3.

[0015] Preferably, the adjustment component also includes a circular ring, which is symmetrically arranged with respect to the vertical center plane of the second connecting plate, and is fixedly connected to the second connecting plate. A rotating rod is arranged inside the circular ring, and the rotating rod passes through the second connecting plate. The rotating rod is rotatably connected to the second connecting plate, and clamping plates are fixedly connected on both sides of the first connecting plate. A sliding groove is provided on one side of the circular ring, and a protrusion is fixedly connected to the rotating rod. The protrusion is in the sliding groove, and the bottom of the clamping plate can abut against the protrusion. An embedded component is provided on one side of the second connecting plate.

[0016] Preferably, the embedding component further comprises screws, through holes are provided in a circumferential array on the rotating rod, the screws are threadedly connected to the second connecting plate, and the screws can be inserted into the through holes.

[0017] Preferably, movable plates are rotatably connected on both sides of the bottom of the second connecting plate, and arc plates are fixedly connected on both sides of the movable plate. Arc grooves are opened on both sides of the second connecting plate, and the arc plate is slidably connected to the arc groove. Fixing bolts are provided on the arc plate, and the fixing bolts can abut against the second connecting plate. The fixing bolts are threadedly connected to the arc plate, and round rods are fixedly connected between adjacent arc plates.

[0018] The utility model has at least the following beneficial effects: by adding a group of die head four on one side of die head three to form three cavities, three layers of heterogeneous slurries can be sprayed out, and the conductivity of the battery is greatly increased; die head one, die head two, die head three and die head four are respectively fixed by a practical fixing component, fixed from the outside without screwing from the inside, so that the locking screws of the three-layer structure do not interfere with each other; by cooperating with the fixing component through the flipping component, online mold opening, die head cleaning and gasket replacement can be realized; the fixing components at different positions are opened according to actual conditions, and the die heads are mutually complementary and interfered with each other; the opening angles between die head one, die head two and die head three can be realized by adjusting the component, thereby achieving the purpose of simultaneously opening die head one, die head two and die head three. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model from another perspective;

[0021] Figure 3 It is a schematic diagram of the enlarged structure of part A in the utility model 2;

[0022] Figure 4 This is a schematic diagram of the structure of the adjustment component of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the movable plate of the utility model.

[0024] In the figure: 10-die head one; 11-die head two; 12-die head three; 13-die head four; 20-fixed component; 30-flip component; 40-adjustment component; 21-fixed plate; 22-L-shaped plate; 31-connecting plate one; 32-connecting plate two; 33-connecting plate three; 41-circular ring; 42-rotating rod; 43-clamping plate; 44-sliding groove; 45-bump; 46-embedded component; 461-screw; 462-through hole; 51-movable plate; 52-arc plate; 53-arc groove; 54-fixing bolt; 55-round rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0026] See also Figure 1-5 The utility model provides a technical solution: a three-layer die head structure for lithium battery coating, comprising:

[0027] A die head 10 is provided on one side of the die head 10, a cavity 1 is formed between the die head 10 and the die head 2 11, a die head 3 12 is provided on the side of the die head 2 11 away from the die head 10, a cavity 2 is formed between the die head 2 11 and the die head 3 12, a die head 4 13 is provided on the side of the die head 3 12 away from the die head 2 11, a cavity 3 is formed between the die head 3 12 and the die head 4 13, and a group of die heads 4 13 is added on one side of the die head 3 12 to form three cavities, so that three layers of heterogeneous slurries can be sprayed out, thereby substantially increasing the conductivity of the battery;

[0028] A fixing assembly 20, wherein the fixing assembly 20 is used to fix the die head 10, the die head 2 11, the die head 3 12 and the die head 4 13 in pairs. The die head 10, the die head 2 11, the die head 3 12 and the die head 4 13 are fixed respectively by the practical fixing assembly 20, and are fixed from the outside without screwing from the inside, so that the locking screws of the three-layer structure do not interfere with each other;

[0029] The flip assembly 30 has two groups, and the flip assembly 30 is respectively arranged between the die head 10, the die head 2 11, the die head 3 12 and the die head 4 13. The flip assembly 30 is used for online mold flipping. By cooperating with the fixed assembly 20, online mold opening, die head cleaning and gasket replacement can be realized. The fixed assembly 20 at different positions is opened according to the actual situation, and the die heads are mutually complementary.

[0030] The adjusting component 40 is used to adjust the flipping angle. The opening angles among the die head 10, the die head 2 11 and the die head 3 12 can be achieved through the adjusting component 40, thereby achieving the purpose of opening the die head 10, the die head 2 11 and the die head 3 12 at the same time.

[0031] The fixing assembly 20 also includes a fixing plate 21, and there are two groups of fixing plates 21, one group of fixing plates 21 is arranged between die head 10 and die head 2 11, and the other group of fixing plates 21 is arranged between die head 3 12 and die head 4 13. Die head 10 and die head 2 11 are fixed to the fixing plates by bolts, and die head 3 12 and die head 4 13 are fixed to the fixing plates 21 by bolts. By opening the corresponding bolts, the adjacent die heads can be opened, thereby achieving the purpose of online mold opening.

[0032] An L-shaped plate 22 is arranged between the die head 2 11 and the die head 3 12, and bolts are connected between the L-shaped plate 22 and the die head 2 11 and the die head 3 12. By opening the bolts, the die head 2 11 and the die head 3 12 can be opened, thereby achieving the purpose of online mold opening.

[0033] The flipping assembly 30 also includes a connecting plate 1 31, a connecting plate 2 32 is hinged on one side of the connecting plate 1 31, the connecting plate 1 31 and the connecting plate 2 32 are fixedly connected to the die head 10 and the die head 2 11 respectively, and a connecting plate 3 33 is hinged on the side of the connecting plate 2 32 away from the connecting plate 1 31, and the connecting plate 3 33 is fixedly connected to the die head 3 12, the die head 10 and the die head 2 11 can be opened or closed by connecting plate 1 31 and connecting plate 2 32, and the die head 2 11 and the die head 3 33 can be opened by connecting plate 2 32 and connecting plate 3 33, thereby achieving the flipping purpose.

[0034] The adjusting assembly 40 also includes a ring 41, which is symmetrically arranged about the vertical center plane of the second connecting plate 32, and the ring 41 is fixedly connected to the second connecting plate 32. A rotating rod 42 is arranged inside the ring 41, and the rotating rod 42 penetrates the second connecting plate 32, and the rotating rod 42 is rotatably connected to the second connecting plate 32. Card plates 43 are fixedly connected to both sides of the first connecting plate 31, and a sliding groove 44 is provided on one side of the ring 41. A protrusion 45 is fixedly connected to the rotating rod 42, and the protrusion 45 is in the sliding groove 44. The bottom of the card plate 43 can abut against the protrusion 45, and an embedded assembly 46 is provided on one side of the second connecting plate 32. By opening the embedded assembly 46, the rotating rod 42 can be rotated to adjust the position of the protrusion 45 in the sliding groove 44. When the first connecting plate 31 is flipped, the card plate 43 on the first connecting plate 31 can abut against the protrusion 45, thereby achieving the purpose of blocking, and then adjusting the opening size.

[0035] The embedded component 46 also includes a screw 461. A through hole 462 is provided in a circumferential array on the rotating rod 42. There are at least eight groups of through holes 462. The screw 461 is threadedly connected to the connecting plate 2 32. The screw 461 can be inserted into the through hole 462. By screwing out the screw 461, the rotating rod 42 can be rotated to adjust the position of the protrusion 45. After adjustment, the screw 461 can be reinserted to complete the fixation.

[0036] The bottom sides of the second connecting plate 32 are rotatably connected with movable plates 51, and the movable plates 51 can fit with the third connecting plate 33. The two sides of the movable plate 51 are fixedly connected with arc plates 52. The two sides of the second connecting plate 32 are provided with arc grooves 53. The arc plates 52 are slidably connected with the arc grooves 53. Fixing bolts 54 are provided on the arc plates 52, and the fixing bolts 54 can abut against the second connecting plate 32. The fixing bolts 54 are threadedly connected with the arc plates 52. Round rods 55 are fixedly connected between adjacent arc plates 52. By loosening the fixing bolts 54, the arc plates 52 can be driven to slide in the arc grooves 53 by rotating the round rods 55. When adjusted to a suitable angle, the fixing bolts 54 can be retightened to complete the fixation.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-layer die structure for lithium battery coating, characterized in that: include: Die head one (10), die head two (11) is arranged on one side of the die head one (10), cavity one is formed between the die head one (10) and the die head two (11), die head three (12) is arranged on the side of the die head two (11) away from the die head one (10), cavity two is formed between the die head two (11) and the die head three (12), die head four (13) is arranged on the side of the die head three (12) away from the die head two (11), cavity three is formed between the die head three (12) and the die head four (13); A fixing assembly (20), wherein the fixing assembly (20) is used to fix the die head 1 (10), the die head 2 (11), the die head 3 (12) and the die head 4 (13) in pairs; A turnover assembly (30), wherein the turnover assembly (30) has two groups, and the turnover assembly (30) is respectively arranged between the die head 1 (10), the die head 2 (11), the die head 3 (12) and the die head 4 (13), and the turnover assembly (30) is used for online mold turnover; An adjustment component (40), wherein the adjustment component (40) is used to adjust the flip angle.

2. A three-layer die head structure for lithium battery coating according to claim 1, characterized in that: The fixing assembly (20) further comprises fixing plates (21), wherein the fixing plates (21) are in total two groups, wherein one group of fixing plates (21) is arranged between die head one (10) and die head two (11), and the other group of fixing plates (21) is arranged between die head three (12) and die head four (13).

3. A three-layer die structure for lithium battery coating according to claim 2, characterized in that: An L-shaped plate (22) is arranged between the second die head (11) and the third die head (12), and bolts are arranged between the L-shaped plate (22) and the second die head (11) and the third die head (12).

4. The three-layer die structure for lithium battery coating according to claim 1, characterized in that: The flip assembly (30) further comprises a connecting plate 1 (31), one side of the connecting plate 1 (31) being hingedly connected to a connecting plate 2 (32), the connecting plate 1 (31) and the connecting plate 2 (32) being fixedly connected to the die head 1 (10) and the die head 2 (11) respectively, the connecting plate 2 (32) being hingedly connected to a connecting plate 3 (33) on a side away from the connecting plate 1 (31), the connecting plate 3 (33) being fixedly connected to the die head 3 (12).

5. A three-layer die structure for lithium battery coating according to claim 4, characterized in that: The adjusting component (40) further comprises a circular ring (41), wherein the circular ring (41) is symmetrically arranged with respect to the vertical center plane of the second connecting plate (32), the circular ring (41) is fixedly connected to the second connecting plate (32), a rotating rod (42) is arranged inside the circular ring (41), the rotating rod (42) penetrates the second connecting plate (32), the rotating rod (42) is rotatably connected to the second connecting plate (32), a clamping plate (43) is fixedly connected to both sides of the first connecting plate (31), a sliding groove (44) is provided on one side of the circular ring (41), a convex block (45) is fixedly connected to the rotating rod (42), the convex block (45) is in the sliding groove (44), the bottom of the clamping plate (43) can abut against the convex block (45), and an embedding component (46) is arranged on one side of the second connecting plate (32).

6. A three-layer die structure for lithium battery coating according to claim 5, characterized in that: The embedding component (46) further comprises a screw (461). A through hole (462) is provided in a circumferential array on the rotating rod (42). The screw (461) is threadedly connected to the second connecting plate (32). The screw (461) can be inserted into the through hole (462).

7. A three-layer die structure for lithium battery coating according to claim 5, characterized in that: The bottom of the second connecting plate (32) is rotatably connected with movable plates (51) on both sides, and the movable plates (51) are fixedly connected with arc plates (52) on both sides. The second connecting plate (32) is provided with arc grooves (53) on both sides, and the arc plates (52) are slidably connected with the arc grooves (53). The arc plates (52) are provided with fixing bolts (54), and the fixing bolts (54) can abut against the second connecting plate (32). The fixing bolts (54) are threadedly connected with the arc plates (52), and round rods (55) are fixedly connected between adjacent arc plates (52).

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