Defoaming and feeding system and lithium battery production line

Abstract

The utility model relates to a defoaming and feeding system and a lithium battery production line. The defoaming and feeding system comprises a transfer tank, a storage trolley, a defoaming machine, a loading trolley, a first driving valve, a second driving valve, a third driving valve and a cooling unit, according to the defoaming and feeding system, automatic conveying of slurry can be achieved, the defoaming machine is arranged to conduct defoaming treatment on the slurry, bubbles are prevented from appearing on the surface of a lithium battery negative electrode roll, and the qualified rate of products is increased; and meanwhile, the cooling unit is arranged for controlling the temperature of the defoamed slurry, so that the flowing activity of the slurry can be always kept in a preset range, the width of the lithium battery negative electrode roll coating can reach the standard, the qualification rate of products is further improved, the productivity is further improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production equipment technology, and in particular to a defoaming feeding system and a lithium battery production line. Background Technology

[0002] In the current lithium battery production process, after the slurry is mixed in the workshop, it is transported to the production line station by pipeline equipment. The production line station is equipped with a transfer tank for temporary storage of slurry. When slurry is needed, a screw pump draws slurry from the transfer tank to the loading trolley, and then the loading trolley transports it to the coating die head.

[0003] During the aforementioned production process, the slurry will generate air bubbles due to the storage time. The presence of air bubbles in the slurry will cause air bubbles on the surface of the lithium battery negative electrode roll, resulting in failure to pass inspection. Furthermore, during the slurry transportation process, the temperature of the slurry is prone to rise, making its fluidity more active, which will also cause the coating width of the lithium battery negative electrode roll to be substandard. This not only wastes manpower and resources and affects production capacity, but also increases production costs. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that in the lithium battery production process, air bubbles will be generated in the slurry, and the slurry with air bubbles will cause air bubbles on the surface of the lithium battery negative electrode roll, resulting in failure to pass inspection. In addition, during the slurry transportation process, the temperature of the slurry is easy to rise, which makes its fluidity more active, and will also cause the coating width of the lithium battery negative electrode roll to be substandard. This not only wastes manpower and material resources and affects production capacity, but also increases production costs.

[0005] To solve the above-mentioned technical problems, this utility model provides a defoaming feeding system for feeding a coating head, comprising:

[0006] Transit tank;

[0007] A storage trolley includes a storage tank, the input end of which is connected to the output end of the transfer tank via a first pipeline;

[0008] The defoaming machine has its input end connected to the output end of the storage tank via a second pipeline;

[0009] The feeding trolley includes a feeding tank;

[0010] The first drive valve has its inlet connected to the output end of the defoamer via a third pipeline. One output port of the first drive valve is connected to the input end of the feeding tank via a fourth pipeline. The other output port of the first drive valve is connected to the input end of the storage tank via a fifth pipeline.

[0011] The second drive valve has its inlet connected to the output end of the feeding tank via the sixth pipeline. One output port of the second drive valve is connected to the input end of the coating head via the feed pipe. The other output port of the second drive valve is connected to the input end of the storage tank via the circulation pipe. The return end of the coating head is connected to the circulation pipe via the return pipe.

[0012] The cooling unit includes a cooling pipe and a chiller. The cooling pipe is wound around the third pipeline, and its two ends are respectively connected to the outlet and return ends of the chiller.

[0013] In one embodiment of this utility model, a proportional ball valve is provided on the cooling pipe.

[0014] In one embodiment of this utility model, a temperature sensor is provided at the end of the third pipeline near the first drive valve.

[0015] In one embodiment of this utility model, a third drive valve is provided on the first pipeline.

[0016] In one embodiment of this utility model, a first level gauge and a second level gauge are respectively provided on the storage tank and the feeding tank.

[0017] In one embodiment of this utility model, the first drive valve and the second drive valve are both pneumatic three-way valves, and the third drive valve is a pneumatic two-way valve.

[0018] In one embodiment of this utility model, a screw pump is provided on the sixth pipeline.

[0019] In one embodiment of the present invention, the defoamer includes a cooling water inlet and a cooling water outlet, and the cooling water inlet and the cooling water outlet are respectively connected to the cooling pipe through an inlet pipe and an outlet pipe.

[0020] In one embodiment of this utility model, both the storage tank and the feeding tank are equipped with a stirring device.

[0021] A lithium battery production line includes a defoaming feeding system as described in any of the above.

[0022] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0023] This utility model discloses a defoaming feeding system and a lithium battery production line, comprising a transfer tank, a storage trolley, a defoaming machine, a feeding trolley, a first drive valve, a second drive valve, and a cooling unit. The input end of the storage trolley is connected to the output end of the transfer tank; the input end of the defoaming machine is connected to the output end of the storage tank; the feeding trolley includes a feeding tank; the input port of the first drive valve is connected to the output end of the defoaming machine via a third pipeline, one output port of the first drive valve is connected to the input end of the feeding tank via a fourth pipeline, and the other output port is connected to the input end of the storage tank via a fifth pipeline; the input port of the second drive valve is connected to the output end of the feeding tank via a sixth pipeline, one output port of the second drive valve is connected to the input end of the coating head via a feed pipe, and the other output port is connected to... The system connects to the input end of the storage tank, and the return end of the coating head is connected to the circulation pipe via the return pipe. The cooling unit includes a cooling pipe and a chiller. The cooling pipe is wound around the fourth pipeline, and its two ends are connected to the outlet and return ends of the chiller, respectively. This defoaming feeding system can realize automatic conveying of slurry and is equipped with a defoaming machine to defoam the slurry, avoiding the appearance of bubbles on the surface of the lithium battery negative electrode roll and improving the product qualification rate. At the same time, the cooling unit is equipped to control the temperature of the defoamed slurry, so that the flow activity of the slurry can always be kept within a predetermined range, ensuring that the width of the lithium battery negative electrode roll coating can meet the standard, further improving the product qualification rate, thereby increasing production capacity and reducing production costs. Attached Figure Description

[0024] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure of the defoaming feeding system according to a preferred embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the storage trolley of the defoaming feeding system according to a preferred embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the feeding trolley of the defoaming feeding system according to a preferred embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the defoaming machine in the defoaming feeding system of a preferred embodiment of this utility model;

[0029] Figure 5 This is a schematic diagram of the second structural form of the cooling pipe of the defoaming feeding system in Embodiment 2.

[0030] Explanation of reference numerals in the accompanying drawings: 1. Transfer tank; 2. Storage trolley; 21. Storage tank; 22. First pipeline; 23. First level gauge; 3. Defoamer; 31. Second pipeline; 32. Inlet pipe; 33. Outlet pipe; 4. Feeding trolley; 41. Feeding tank; 42. Second level gauge; 5. First drive valve; 51. Third pipeline; 52. Fourth pipeline; 53. Fifth pipeline; 54. Temperature sensor; 6. Second drive valve; 61. Sixth pipeline; 62. Feed pipe; 63. Circulation pipe; 64. Return pipe; 7. Cooling unit; 71. Cooling pipe; 72. Chiller; 73. Proportional ball valve; 8. Third drive valve; 9. Screw pump; A. Coating head. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0032] Example 1, refer to Figures 1-4 As shown, this utility model discloses a defoaming feeding system for feeding a coating head, comprising:

[0033] Transfer tank 1;

[0034] The storage trolley 2 includes a storage tank 21, the input end of which is connected to the output end of the transfer tank 1 via a first pipeline 22;

[0035] The defoaming machine 3 has its input end connected to the output end of the storage tank 21 via the second pipeline 31;

[0036] The feeding trolley 4 includes a feeding tank 41;

[0037] The first drive valve 5 has its input port connected to the output end of the defoamer 3 through the third pipe 51. One output port of the first drive valve 5 is connected to the input end of the feeding tank 41 through the fourth pipe 52. The other output port of the first drive valve 5 is connected to the input end of the storage tank 21 through the fifth pipe 53.

[0038] The second drive valve 6 has its input port connected to the output end of the feeding tank 41 through the sixth pipe 61. One output port of the second drive valve 6 is connected to the input end of the coating head A through the feed pipe 62. The other output port of the second drive valve 6 is connected to the input end of the storage tank 21 through the circulation pipe 63. The return end of the coating head is connected to the circulation pipe 63 through the return pipe 64.

[0039] Cooling unit 7 includes cooling pipe 71 and chiller 72. Cooling pipe 71 is wound around the third pipe 51. The two ends of cooling pipe 71 are connected to the outlet end and the return end of chiller 72, respectively.

[0040] Specifically, the output end of the transfer tank 1 is connected to the input end of the storage tank 21 through the first pipeline 22. The first pipeline 22 is equipped with a third drive valve 8. The output end of the storage tank 21 is connected to the input end of the defoamer 3 through the second pipeline 31. The output end of the defoamer 3 is connected to the input port of the first drive valve 5 (three-way valve) through the third pipeline 51. One output port of the first drive valve 5 is connected to the output end of the feeding tank 41 through the fourth pipeline 52. The other output port of the first drive valve 5 is connected to the input end of the storage tank 21 through the fifth pipeline 53. The output end of the feeding tank 41 is connected to the input port of the second drive valve 6 (three-way valve) through the sixth pipeline 61. One output port of the second drive valve 6 is connected to the input end of the coating head through the feed pipe 62. The other output port of the second drive valve 6 is connected to the input end of the storage tank 21 through the circulation pipe 63. The return end of the coating head is connected to the circulation pipe 63 through the return pipe 64.

[0041] In the lithium battery production process, the slurry in the transfer tank 1 is first fed into the storage tank 21 of the storage trolley 2 through the first pipeline 22. The input amount is controlled by the first level gauge 23, the third drive valve 8, and the controller installed on the storage tank 21 to ensure that the slurry in the storage tank 21 is always within the predetermined level range. Then, the defoamer 3 extracts the slurry from the storage tank 21 through the second pipeline 31 to perform defoaming. After defoaming, the slurry is sequentially fed into the feeding tank 41 through the third pipeline 51, the first drive valve 5, and the fourth pipeline 52. In the process, the amount of defoamed slurry input into the feeding tank 41 is controlled by the first drive valve 5 and the second level gauge 42 installed on the feeding tank 41 to ensure that the slurry in the feeding tank 41 is within the predetermined level range. Then, the slurry in the feeding tank 41 is driven by the screw pump 9 installed on the sixth pipeline 61 and input into the coating head through the sixth pipeline 61, the second drive valve 6, and the feed pipe 62, and finally sprayed onto the negative electrode membrane. Some of the excess material flows out from the return end of the coating head and is circulated to the storage tank 21 for recycling in sequence through the return pipe 64 and the circulation pipe 63.

[0042] During the movement of the slurry along the pipeline, when the slurry passes through the third pipeline 51, the cold water circulating in the cooling pipe 71 wrapped around the third pipeline 51 can carry away some of the heat of the slurry, ensuring that the temperature of the slurry remains stable during the transportation process. This keeps the flow activity of the slurry within a predetermined range, ensuring that the width of the lithium battery negative electrode coating can meet the standard and improve the pass rate.

[0043] Specifically, in the early stage of operation of this defoaming feeding system, the output port connected to the first drive valve 5 and the fourth pipeline 52 is in a closed state. During operation, the slurry is input from the transfer tank 1 into the storage tank 21, and the storage tank 21 outputs the slurry to the defoamer 3. After the slurry is defoamed by the defoamer 3, it flows back to the storage tank 21 through the third pipeline 51, the first drive valve 5, and the fifth pipeline 53. The output port connected to the first drive valve 5 and the fourth pipeline 52 is only opened after the defoamer 3 is running stably. This can avoid the problem of incomplete defoaming caused by the unstable operation of the defoamer 3 in the early stage of startup.

[0044] Specifically, when the coating head is not in operation, due to the properties of the slurry, the output port connected to the second drive valve 6 and the feed pipe 62 is closed. The slurry in the feed tank 41 flows back to the storage tank 21 through the sixth pipe 61, the second drive valve 6, and the circulation pipe 63 to form a slurry circulation. In this way, the slurry in the entire pipeline flows continuously, preventing the slurry from settling and stratifying and maintaining the stability of the slurry's rheological properties, which is beneficial to ensuring coating quality.

[0045] This utility model discloses a defoaming feeding system that enables automatic conveying of slurry. It includes a defoaming machine to defoam the slurry, preventing air bubbles from forming on the surface of the lithium battery negative electrode roll and improving product yield. Simultaneously, a cooling unit controls the temperature of the defoamed slurry, ensuring its flowability remains within a predetermined range. This guarantees that the width of the lithium battery negative electrode roll coating meets standards, further improving product yield, thereby increasing production capacity and reducing production costs.

[0046] Furthermore, a proportional ball valve 73 is installed on the cooling pipe 71.

[0047] Furthermore, a temperature sensor 54 is installed at the end of the third pipeline 51 near the first drive valve 5. Specifically, the temperature sensor 54 can monitor the temperature of the slurry in real time. The controller adjusts the opening of the proportional ball valve 73 based on the detected temperature value of the slurry, thereby adjusting the flow rate of cooling water in the cooling pipe 71, and thus regulating the temperature of the slurry to maintain it within a predetermined temperature range. The temperature sensor 54 can be a platinum resistance thermometer.

[0048] Furthermore, a third drive valve 8 is installed on the first pipeline 22.

[0049] Furthermore, a first level gauge 23 and a second level gauge 42 are respectively installed on the storage tank 21 and the feeding tank 41.

[0050] Furthermore, the first drive valve 5 and the second drive valve 6 are both pneumatic three-way valves, and the third drive valve 8 is a pneumatic two-way valve.

[0051] Furthermore, a screw pump 9 is installed on the sixth pipeline 61.

[0052] Furthermore, the system includes a controller, which is connected to the first drive valve 5, the second drive valve 6, the third drive valve 8, the defoamer 3, the chiller 72, the screw pump 9, the first level gauge 23, and the second level gauge 42. The controller enables automatic control of each component and the entire system.

[0053] Furthermore, the defoamer 3 includes a cooling water inlet and a cooling water outlet, which are connected to the cooling pipe 71 via an inlet pipe 32 and an outlet pipe 33, respectively.

[0054] Furthermore, both the storage tank 21 and the feeding tank 41 are equipped with stirring devices. Specifically, both the storage tank 21 and the feeding tank 41 include a tank body, with an input end (both the input and output ends can be equipped with shut-off valves) on the side of the tank body, an output end at the bottom of the tank body, and a drive source vertically mounted on the top of the tank body. The output end of the drive source is coaxially connected to a stirring shaft extending into the tank body, and stirring blades are mounted on the stirring shaft. Specifically, both the storage trolley 2 and the feeding trolley 4 include a trolley, and the storage tank 21 and the feeding tank 41 are respectively connected to a trolley.

[0055] Example 2, refer to Figure 5 As shown, based on Embodiment 1, this utility model provides another structural form of cooling pipe 71. Cooling pipe 71 adopts a multi-segment circular pipe sleeved on the third pipe 51. Each circular pipe has a cavity inside, and the two ends of the circular pipe are respectively provided with water inlet and water outlet connecting the cavity. The water inlet and water outlet are respectively connected to the water outlet and water return end of the chiller 72.

[0056] Example 3: This utility model also discloses a lithium battery production line, including the defoaming feeding system as in Example 1.

[0057] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A defoaming feeding system for feeding a coating head, characterized in that: include, Transit tank; A storage trolley includes a storage tank, the input end of which is connected to the output end of the transfer tank via a first pipeline; The defoaming machine has its input end connected to the output end of the storage tank via a second pipeline; The feeding trolley includes a feeding tank; The first drive valve has its inlet connected to the output end of the defoamer via a third pipeline. One output port of the first drive valve is connected to the input end of the feeding tank via a fourth pipeline. The other output port of the first drive valve is connected to the input end of the storage tank via a fifth pipeline. The second drive valve has its inlet connected to the output end of the feeding tank via the sixth pipeline. One output port of the second drive valve is connected to the input end of the coating head via the feed pipe. The other output port of the second drive valve is connected to the input end of the storage tank via the circulation pipe. The return end of the coating head is connected to the circulation pipe via the return pipe. The cooling unit includes a cooling pipe and a chiller. The cooling pipe is wound around the third pipeline, and its two ends are respectively connected to the outlet and return ends of the chiller.

2. The defoaming feeding system according to claim 1, characterized in that: A proportional ball valve is installed on the cooling pipe.

3. The defoaming feeding system according to claim 2, characterized in that: A temperature sensor is installed at the end of the third pipeline near the first drive valve.

4. The defoaming feeding system according to claim 1, characterized in that: A third drive valve is installed on the first pipeline.

5. The defoaming feeding system according to claim 4, characterized in that: The storage tank and the feeding tank are respectively equipped with a first level gauge and a second level gauge.

6. The defoaming feeding system according to claim 4, characterized in that: The first and second drive valves are both pneumatic three-way valves, and the third drive valve is a pneumatic two-way valve.

7. The defoaming feeding system according to claim 1, characterized in that: A screw pump is installed on the sixth pipeline.

8. The defoaming feeding system according to claim 1, characterized in that: The defoaming machine includes a cooling water inlet and a cooling water outlet, which are connected to the cooling pipe via an inlet pipe and an outlet pipe, respectively.

9. The defoaming feeding system according to claim 1, characterized in that: Both the storage tank and the feeding tank are equipped with a stirring device.

10. A lithium battery production line, characterized in that: Includes the defoaming feeding system as described in any one of claims 1-9.

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