A novel double-sided composite coating device for lithium battery pole pieces

Abstract

The utility model provides a novel lithium battery pole piece double -faced composite coating device, including feeding mechanism, coating mechanism, feed mechanism, drying mechanism, material receiving mechanism, the application is due to the front, back coating die head device adopts the precision guiding device connection, ensure that the alignment of base material front, back face coating layer, in addition, the inlet and outlet battery pole piece of double -faced coating device adopts the clamping roll or clamping wheel and clamps, improves the surface density of coating, improves the peeling strength of base material and coating layer, simultaneously, cancels the coating roller device of conventional coating, saves equipment cost and equipment installation space, above all, the application has great economic value and social value.

Description

Technical Field

[0001] This utility model relates to the technical field of double-sided coating equipment for lithium battery electrodes, specifically a novel double-sided composite coating device for lithium battery electrodes. Background Technology

[0002] Coating of battery electrode substrates is one of the key processes in battery production. Existing coating equipment, whether single-sided or double-sided, carries the risk of poor alignment accuracy between the coating layers on the front and back of the electrode. This is especially true for double-sided coating, where two coating mechanisms, staggered and applied to both sides of the battery electrode substrate simultaneously, can cause substrate vibration due to the gap between the substrate and the coating mechanism. This vibration can negatively impact coating quality (alignment, areal density, peel strength, etc.), resulting in unsatisfactory results. Furthermore, when the die head is applying coating to the second side, the electrode, lacking support from the coating rollers, is prone to vibration under the influence of the oven's airflow, further affecting coating quality. Particularly when the die head lip is facing downwards, material leakage can occur during inter-coating, or noticeable tailing issues can arise during the thinning process. Therefore, further improvements are needed. Utility Model Content

[0003] The purpose of this invention is to provide a novel double-sided composite coating device for lithium battery electrodes that is highly efficient, effectively improves coating quality, and saves costs.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model provides a novel double-sided composite coating device for lithium battery electrodes, comprising:

[0006] The feeding mechanism is used to transport battery substrates.

[0007] A coating mechanism is used to coat the battery electrode substrates conveyed by the feeding mechanism.

[0008] A feeding mechanism is used to provide coating raw materials to the coating mechanism;

[0009] A drying unit is used to dry the substrate that has been sprayed by the coating unit;

[0010] The receiving mechanism is used to collect battery electrode materials that have been dried by the drying mechanism.

[0011] Furthermore, the feeding mechanism includes a feeding roll for providing battery electrode substrate, a first feed roller, a first traction roller, a first clamping roller, a second feed roller, and a third feed roller for changing the feeding direction.

[0012] Furthermore, the first guide roller and the first traction roller are disposed on the reverse side of the battery electrode substrate, the first clamping roller, the second guide roller and the third guide roller are disposed on the front side of the battery electrode substrate, and the first traction roller and the first clamping roller are disposed in contact with both sides of the battery electrode substrate.

[0013] Furthermore, the coating mechanism includes a first die head and a second die head respectively disposed on the front and back sides of the battery electrode substrate. The first die head and the second die head are respectively disposed opposite to each other. The front ends of the first die head and the second die head are provided with a fourth roller and a second clamping roller. The rear ends of the first die head and the second die head are provided with a first clamping wheel assembly and a second clamping wheel assembly.

[0014] Furthermore, the third roller and the second clamping roller are respectively disposed on the front and back sides of the battery electrode substrate.

[0015] The first clamping wheel assembly and the second clamping wheel assembly are respectively disposed on the front and back sides of the battery electrode substrate.

[0016] Furthermore, the drying mechanism is equipped with rollers to enhance the stability of the battery electrode substrate during transport.

[0017] Furthermore, the first die head is connected to a first siphon valve, a first material pump, and a material storage device.

[0018] Furthermore, the second die head is connected to a second siphon valve, a second material pump, and the material storage device. Furthermore, the receiving mechanism includes a fifth guide roller, a third clamping roller, a second traction roller, a sixth guide roller, and a receiving roll for changing the conveying direction.

[0019] Furthermore, the fifth passing roller and the third clamping roller are disposed on the reverse side of the battery electrode substrate, and the second traction roller and the sixth passing roller are disposed on the front side of the battery electrode substrate, with the third clamping roller and the second traction roller being disposed correspondingly.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This application employs a precision guiding device to connect the front and back coating die heads, ensuring the alignment of the coating layers on the front and back of the substrate. Furthermore, the inlet and outlet battery electrode sheets of this application's double-sided coating device are clamped by clamping rollers or wheels, increasing the coating density and improving the peel strength between the substrate and the coating layer. Simultaneously, it eliminates the need for conventional coating rollers, saving equipment costs and installation space. Finally, this application uses a siphon valve to prevent die head leakage, improving coating quality. In conclusion, this application possesses significant economic and social value. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of a novel double-sided composite coating device for lithium battery electrodes according to this utility model;

[0023] Figure 2 This is a partial structural schematic diagram of a novel double-sided composite coating device for lithium battery electrodes according to this utility model;

[0024] Figure 3 This is another partial structural schematic diagram of a novel double-sided composite coating device for lithium battery electrodes according to this utility model;

[0025] Figure 4 This is a partial structural schematic diagram of the third part of a novel double-sided composite coating device for lithium battery electrodes according to this utility model;

[0026] Figure 5 This is the fourth partial structural schematic diagram of a novel double-sided composite coating device for lithium battery electrodes according to this utility model;

[0027] Figure 6 This is a schematic diagram of the operation of a novel double-sided composite coating device for lithium battery electrodes according to this utility model;

[0028] Figure 7 This is a schematic diagram of the combined structure of the fourth roller and the second clamping roller of a novel double-sided composite coating device for lithium battery electrodes according to this utility model. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figure 1-7 As shown, the present invention provides a novel double-sided composite coating device for lithium battery electrodes, comprising:

[0031] Feeding mechanism 1 is used to transport battery substrate.

[0032] Coating mechanism 2 is used to coat the battery electrode substrate conveyed by feeding mechanism 1;

[0033] The feeding mechanism 3 is used to provide coating raw materials to the coating mechanism 2;

[0034] The drying unit 4 is used to dry the substrate that has been sprayed by the coating unit 2;

[0035] The receiving mechanism 5 is used to collect the battery electrode material that has been dried by the drying mechanism 4.

[0036] In this embodiment, the feeding mechanism 1 includes a feeding roll 100 for providing battery electrode substrate 6, a first feed roller 101, a first traction roller 102, a first clamping roller 103, a second feed roller 104, and a third feed roller 105 for changing the feeding direction.

[0037] In this embodiment, the first guide roller 101 and the first traction roller 102 are disposed on the reverse side of the battery electrode substrate 6, and the first clamping roller 103, the second guide roller 104, and the third guide roller 105 are disposed on the front side of the battery electrode substrate 6.

[0038] The first traction roller 102 and the first clamping roller 103 abut against both sides of the battery electrode substrate 6.

[0039] In this embodiment, the coating mechanism 2 includes a first die 7 and a second die 8 respectively disposed on the front and back sides of the battery electrode substrate 6, with the first die 7 and the second die 8 correspondingly arranged.

[0040] The front ends of the first die head 7 and the second die head 8 are provided with a fourth guide roller 9 and a second clamping roller 10.

[0041] The rear ends of the first mold head 7 and the second mold head 8 are provided with a first clamping wheel assembly 11 and a second clamping wheel assembly 12.

[0042] In this embodiment, the third roller 105 and the second clamping roller 10 are respectively disposed on the front and back sides of the battery electrode substrate 6, and the first clamping wheel assembly 11 and the second clamping wheel assembly 12 are respectively disposed on the front and back sides of the battery electrode substrate 6.

[0043] In this embodiment, the drying mechanism 4 is provided with a roller 13 to reinforce the stability of the transmission of the battery electrode substrate 6. At the same time, the drying mechanism 4 is also provided with a plurality of air nozzles 401 in an orderly manner.

[0044] In this embodiment, the first die head 7 is connected to a first siphon valve 701, a first material pump 702, and a material storage device 14.

[0045] In this embodiment, the second die head 8 is connected to a second siphon valve 801, a second material pump 802 and the material storage device 14.

[0046] In this embodiment, the receiving mechanism 5 includes a fifth guide roller 501, a third clamping roller 502, a second traction roller 503, a sixth guide roller 504, and a receiving roll 505 for changing the conveying direction.

[0047] In this embodiment, the fifth roller 501 and the third clamping roller 502 are disposed on the reverse side of the battery electrode substrate 6.

[0048] The second traction roller 503 and the sixth guide roller 504 are disposed on the front side of the battery electrode substrate 6.

[0049] The third clamping roller 502 and the second traction roller 503 are respectively arranged.

[0050] like Figure 6-7 As shown, in the working process of this application, the battery electrode substrate enters the double-sided simultaneous coating composite die head device through the traction roller. Before the coating die head, there is a clamping roller assembly to stabilize the electrode. After the slurry is coated, clamping roller assemblies are added on both sides to reduce the impact of vibration on the coating quality of the electrode. The coated battery electrode enters the oven for baking. After baking and drying, the battery electrode is collected into a roll by the traction roller and the passing roller and flows into the next process. At the same time, when inter-coating or thinning the head and tail, the siphon valve closes the slurry and opens the siphon valve at the same time to avoid excess material dripping from the die head lip and improve the tailing problem during thinning.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel double-sided composite coating device for lithium battery electrodes, characterized in that, include: The feeding mechanism is used to transport battery substrates. A coating mechanism is used to coat the battery electrode substrates conveyed by the feeding mechanism. A feeding mechanism is used to provide coating raw materials to the coating mechanism; A drying unit is used to dry the substrate that has been sprayed by the coating unit; The receiving mechanism is used to collect battery electrode materials that have been dried by the drying mechanism.

2. The novel lithium battery electrode double-sided composite coating device according to claim 1, characterized in that: The feeding mechanism includes a feed roll for providing battery electrode substrate. The first feed roller, first traction roller, first clamping roller, second feed roller, and third feed roller are used to change the feeding direction.

3. The novel lithium battery electrode double-sided composite coating device according to claim 2, characterized in that: The first guide roller and the first traction roller are located on the reverse side of the battery electrode substrate. The first clamping roller, the second guide roller, and the third guide roller are disposed on the front side of the battery electrode substrate. The first traction roller and the first clamping roller abut against both sides of the battery electrode substrate.

4. The novel lithium battery electrode double-sided composite coating device according to claim 1, characterized in that: The coating mechanism includes a first die head and a second die head respectively disposed on the front and back sides of the battery electrode substrate, with the first die head and the second die head being arranged correspondingly. The front ends of the first and second die heads are provided with a fourth guide roller and a second clamping roller. The rear ends of the first and second mold heads are provided with a first clamping wheel assembly and a second clamping wheel assembly.

5. A novel double-sided composite coating device for lithium battery electrodes according to claim 4, characterized in that: The third roller and the second clamping roller are respectively disposed on the front and back sides of the battery electrode substrate, and the first clamping wheel assembly and the second clamping wheel assembly are respectively disposed on the front and back sides of the battery electrode substrate.

6. The novel lithium battery electrode double-sided composite coating device according to claim 1, characterized in that: The drying mechanism is equipped with rollers to enhance the stability of the battery electrode substrate during transport.

7. A novel double-sided composite coating device for lithium battery electrodes according to claim 4, characterized in that: The first die head is connected to a first siphon valve, a first material pump, and a material storage device.

8. A novel double-sided composite coating device for lithium battery electrodes according to claim 4 or 7, characterized in that: The second die head is connected to a second siphon valve, a second material pump, and the material storage device.

9. A novel double-sided composite coating device for lithium battery electrodes according to claim 1, characterized in that: The receiving mechanism includes a fifth guide roller, a third clamping roller, a second traction roller, a sixth guide roller, and a receiving roll for changing the conveying direction.

10. A novel double-sided composite coating device for lithium battery electrodes according to claim 9, characterized in that: The fifth roller and the third clamping roller are located on the reverse side of the battery electrode substrate. The second traction roller and the sixth guide roller are located on the front side of the battery electrode substrate. The third clamping roller and the second traction roller are respectively arranged.

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