Extraction tank for diaphragm and extraction device with extraction tank

Abstract

The utility model relates to the technical field of battery diaphragms, in particular to an extraction tank for a diaphragm and an extraction device with the extraction tank, which comprises a tank body and a foreign matter deposition tank communicated with the bottom of the tank body, and the foreign matter deposition tank is detachably connected with the tank body. And a baffle with an open state and a closed state is arranged at the communication part of the tank body and the foreign matter deposition tank. When the baffle is in an open state, the foreign matter deposition tank is communicated with the tank body, and precipitates or foreign matters generated by extraction are collected into the foreign matter deposition tank under the action of self gravity or other types of actions; when foreign matter or sediment in the foreign matter deposition tank needs to be cleaned, the movable baffle is in a closed state, the foreign matter deposition tank is isolated from the tank body, and the foreign matter deposition tank can be taken down for cleaning. Foreign matters are accumulated and collected into the foreign matter deposition tank, and the cleaning operation is effectively simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of battery diaphragms, and more particularly to an extraction tank for a diaphragm and an extraction device having the same. Background Art

[0002] The diaphragm is a key internal component in the lithium battery structure. Currently, the mainstream diaphragms are mainly PE and PP. To meet the various requirements of the battery cell, the diaphragm requires functional coating. Whether it is wet-process PE diaphragm preparation or some organic oil-based coating, an extraction step is involved. Previously, a parallel solvent tank model was mainly used. The solvent tank is equipped with rollers to pull the diaphragm. The solvent in the diaphragm is then exchanged and extracted with the solvent in the solvent tank to achieve the purpose of pore formation or film formation. As the extraction progresses and the extraction time increases, foreign matter accumulates at the bottom of the extraction tank, making it difficult to clean. Some foreign matter may even adhere to the surface of the diaphragm, affecting its performance. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art in that foreign matter is deposited and difficult to clean, and to provide an extraction tank for a diaphragm and an extraction device having the same, which can collect the accumulated foreign matter and simplify the cleaning operation.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] Provided is an extraction tank for a diaphragm, comprising a tank body and a foreign matter sedimentation tank connected to the bottom of the tank body, wherein the foreign matter sedimentation tank is detachably connected to the tank body, and a baffle having an open state and a closed state is provided at the connection between the tank body and the foreign matter sedimentation tank.

[0006] In the diaphragm extraction tank of the present invention, when the baffle is in the open state, the foreign matter sedimentation tank is connected to the tank body, and the precipitate or foreign matter produced by extraction is collected in the foreign matter sedimentation tank under the action of its own gravity or other types of forces. When the foreign matter or precipitate in the foreign matter sedimentation tank needs to be cleaned, the movable baffle is closed to isolate the foreign matter sedimentation tank from the tank body, and the foreign matter sedimentation tank can be removed for cleaning. The utility model collects accumulated foreign matter in the foreign matter sedimentation tank, effectively simplifying the cleaning operation.

[0007] Furthermore, the tank body is provided with a water inlet and a water outlet on either side, with the water outlet being positioned lower than the water inlet. A slag discharge port is provided near the water outlet, and the foreign matter sedimentation tank is detachably connected to the slag discharge port. Solvent flows from the water inlet to the water outlet, and under the action of the water flow, foreign matter or precipitate produced by extraction flows toward the slag discharge port and is collected in the foreign matter sedimentation tank.

[0008] Furthermore, the trough body includes a trough bottom plate and trough side plates connected to the trough bottom plate. The trough bottom plate is inclined and has a slag discharge port at one end. The trough bottom plate is an inclined flat plate. The inclination of the trough bottom plate can guide foreign matter or sediment into the foreign matter sedimentation trough. The slag discharge port is specifically located at the lower end of the trough bottom plate.

[0009] Furthermore, the inclination angle of the trough bottom plate is 30° to 90°, wherein the inclination angle of the trough bottom plate does not include 90°.

[0010] Furthermore, a filter is detachably connected to the middle portion of the inner wall of the foreign matter deposition tank, and a solvent outlet is provided at the bottom of the foreign matter deposition tank. If foreign matter or sediment is deposited on the filter, the filter can be replaced with a new one to remove the foreign matter, and the solvent in the foreign matter deposition tank can be discharged through the solvent outlet.

[0011] Furthermore, the trough body is provided with a first chute, and the top of the foreign matter deposition trough is provided with a slide rail slidably connected to the first chute. The foreign matter deposition trough is slidably installed on the trough body through the slide rail and the chute, which is easy to install and remove.

[0012] Furthermore, locking mechanisms are provided at both ends of the first chute to limit the position of the foreign matter deposit trough. The locking mechanisms lock the position of the foreign matter deposit trough relative to the trough body, ensuring the stability of the relative position of the two and preventing liquid leakage caused by accidental displacement of the foreign matter deposit trough.

[0013] Furthermore, the trough body is provided with a second chute, and the baffle is provided with a sliding block, which is slidably connected to the second chute. The second chute and the sliding block cooperate to achieve stable sliding of the baffle; when the sliding block partially extends out of the second chute, the sliding block can be manually operated to switch the baffle between an open state and a closed state.

[0014] Furthermore, a material level sensor is provided within the foreign matter deposition tank. The material level sensor is connected to a controller, which is connected to a driver. The driver is mounted within the tank body, and the output end of the driver is connected to the baffle. The material level sensor monitors the position of deposited foreign matter within the foreign matter deposition tank. When the material level of the deposited foreign matter exceeds a set material level, the controller transmits a signal to the driver, thereby automatically switching the baffle between an open state and a closed state.

[0015] The utility model further provides an extraction device, comprising a plurality of conveying rollers and a plurality of extraction tanks for the diaphragms as described above, wherein the diaphragms pass around the peripheries of the plurality of conveying rollers in sequence.

[0016] The extraction device of the utility model conveys the membrane via a conveyor roller, and the membrane exchanges and extracts with the solvent in the solvent tank during the conveying process to achieve the purpose of pore formation or film formation. The utility model collects the accumulated foreign matter into the foreign matter sedimentation tank, effectively simplifying the cleaning operation.

[0017] Furthermore, a plurality of extraction tanks are vertically spaced apart. The plurality of extraction tanks are distributed vertically, which can effectively utilize the upper space and reduce the length of the space production line.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The diaphragm extraction tank and the extraction device having the same of the utility model are such that the precipitation or foreign matter deposited due to extraction is collected in the foreign matter deposition tank, the baffle is closed to isolate the foreign matter deposition tank and the environment inside the tank, and the foreign matter deposition tank can be removed for cleaning, thereby effectively simplifying the cleaning operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the extraction tank for the diaphragm;

[0021] Figure 2 It is a schematic diagram of the connection between the foreign matter sedimentation tank and the tank body;

[0022] Figure 3 Schematic diagram of the connection between the baffle and the tank body;

[0023] Figure 4 Schematic diagram of the structure of the extraction device;

[0024] In the accompanying drawings: 100, extraction tank; 110, tank body; 111, water inlet; 112, water outlet; 113, slag discharge port; 114, tank side plate; 115, tank bottom plate; 116, first chute; 117, second chute; 120, foreign matter sedimentation tank; 121, filter screen; 122, solvent discharge port; 123, slide rail; 130, baffle; 131, sliding block; 200, diaphragm; 400, active roller; 500, driven roller. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0026] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and so on indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] Example 1

[0028] This embodiment is the first embodiment of the extraction tank 100 for the diaphragm 200 of the present invention, comprising a tank body 110 and a foreign matter sedimentation tank 120 connected to the bottom of the tank body 110. The foreign matter sedimentation tank 120 is detachably connected to the tank body 110. A baffle 130 having an open state and a closed state is provided at the connection between the tank body 110 and the foreign matter sedimentation tank 120. Figure 1 In this embodiment, when the baffle 130 is in the open state, the foreign matter sedimentation tank 120 is connected to the tank body 110, and the precipitate or foreign matter deposited by extraction is collected in the foreign matter sedimentation tank 120; when the foreign matter or sediment in the foreign matter sedimentation tank 120 needs to be cleaned, the movable baffle 130 is closed to isolate the foreign matter sedimentation tank 120 from the tank body 110, and the foreign matter sedimentation tank 120 can be removed for cleaning, which is simple to operate.

[0029] In this embodiment, the force causing the precipitation or foreign matter generated by extraction to settle into the foreign matter sedimentation tank 120 may be derived from one of the following forces or a combination of several forces.

[0030] The gravity of the sediment or foreign matter provides the force for the sedimentation of the foreign matter. At this time, the cross-sectional area of ​​the connection between the foreign matter sedimentation tank 120 and the tank body 110 of this embodiment can be set to be equal to the cross-sectional area of ​​the tank body 110, so as to receive and collect more sediment or foreign matter in a larger range.

[0031] The flow of the solvent provides a force for the deposition of foreign matter. Specifically, a water inlet 111 and a water outlet 112 are respectively provided on both sides of the tank body 110. The water outlet 112 is set lower than the water inlet 111. The tank wall between the water inlet 111 and the water outlet 112 can be a flat surface or a smooth curved surface. A slag discharge port 113 is provided near the water outlet 112 of the tank body 110. The foreign matter deposition tank 120 can be detachably connected to the slag discharge port 113. Figure 1When this embodiment is implemented, the solvent in the extraction tank 100 flows in from the upper side and out from the lower side. The solvent flows from the upper side to the lower side. The precipitation or foreign matter generated by the extraction is collected in the foreign matter sedimentation tank 120 through the slag discharge port 113 along the direction of liquid flow.

[0032] The inclination angle of the trough bottom plate 115 provides a force for the deposition of foreign matter. Specifically, the trough body 110 includes a trough bottom plate 115 and a trough side plate 114 connected to the trough bottom plate 115. The trough bottom plate 115 is inclined and has an inclination angle of 30° to 90°. Figure 1 In this embodiment, the trough bottom plate 115 is a flat plate arranged at an angle. The inclination of the trough bottom plate 115 can guide foreign matter or sediment to flow into the foreign matter sedimentation trough 120. The inclination of the trough bottom plate is selected to achieve a better guiding effect and is not a limitation of the present invention.

[0033] When the flow of the solvent, the inclination of the trough bottom plate 115, the precipitation or the gravity of the foreign matter jointly provide the force for the deposition of foreign matter, in order to avoid mutual interference between the water outlet 112 and the slag discharge port 113, the water inlet 111 and the water outlet 112 are respectively opened on the trough side plate 114, and the slag discharge port 113 is opened at one end of the trough bottom plate 115 close to the water outlet 112, which facilitates the installation of the foreign matter deposition trough 120.

[0034] When the foreign matter deposition tank 120 is removed, there is a risk of solvent leakage from the extraction tank 100. To mitigate this risk, this embodiment provides a baffle 130 at the connection between the tank body 110 and the foreign matter deposition tank 120, which can be opened or closed. When the baffle 130 is open, the foreign matter deposition tank 120 and the tank body 110 are connected; when the baffle 130 is closed, the foreign matter deposition tank 120 and the tank body 110 are separated and independent of each other.

[0035] In this embodiment, a movable baffle 130 may be provided at the connection between the extraction tank 100 and the foreign matter deposition tank 120. Before removing the foreign matter deposition tank 120, the baffle 130 may be moved to the connection between the extraction tank 100 and the foreign matter deposition tank 120 to isolate the internal environments of the two. The baffle 130 of this embodiment may be movably connected to the foreign matter deposition tank 120, movably connected to the tank body 110, or may be an independent plate structure not connected to the foreign matter deposition tank 120 or the tank body 110. This embodiment does not limit this.

[0036] The membrane 200 of this embodiment is used in the extraction tank 100, and the specific working principle is as follows:

[0037] When the baffle 130 is in the open state, the foreign matter sedimentation trough 120 is connected to the trough body 110, and the precipitate or foreign matter produced by extraction is collected in the foreign matter sedimentation trough 120 under the action of at least one of its own gravity, the flow of the solvent, and the push of the inclination angle of the trough bottom plate 115; when it is necessary to clean the foreign matter or precipitate in the foreign matter sedimentation trough 120, the movable baffle 130 is closed to isolate the foreign matter sedimentation trough 120 from the trough body 110, and the foreign matter sedimentation trough 120 can be removed for cleaning.

[0038] Example 2

[0039] This embodiment is a second embodiment of the extraction tank 100 for the diaphragm 200 of the present invention. This embodiment is similar to the first embodiment, except that a filter screen 121 is detachably connected to the middle of the inner wall of the foreign matter sedimentation tank 120, and a solvent discharge port 122 is provided at the bottom of the foreign matter sedimentation tank 120. Figure 1 、 Figure 2 When this embodiment is implemented, foreign matter or sediment produced by extraction is deposited on the filter 121. The foreign matter can be cleaned by replacing the filter 121 with a new one, and the solvent in the foreign matter deposition tank 120 can be discharged through the solvent outlet 122. Specifically, the filter 121 and the inner wall of the foreign matter deposition tank 120 can be detachably connected by a snap-fit ​​structure, a threaded structure, or other connecting structure. A valve or a sealing plug is provided at the solvent outlet 122. When the solvent needs to be discharged, the valve or the sealing plug is opened. When the solvent does not need to be discharged, the valve or the sealing plug is closed to keep the environment inside the tank body 110 relatively sealed.

[0040] The specific working principle of this embodiment is as follows:

[0041] When it is determined that the foreign matter or sediment in the foreign matter deposition tank 120 needs to be cleaned, the movable baffle 130 is closed to isolate the environment inside the tank body 110 from the environment inside the foreign matter deposition tank 120, the solvent discharge port 122 is opened to discharge the solvent in the foreign matter deposition tank 120, the filter 121 is removed to clean the foreign matter and a new filter 121 is replaced.

[0042] Example 3

[0043] This embodiment is the third embodiment of the extraction tank 100 for the diaphragm 200 of the present invention. This embodiment is similar to the first embodiment, except that, in this embodiment, the foreign matter sedimentation tank 120 is slidably connected to the tank body 110 .

[0044] Specifically, the trough body 110 is provided with a first chute 116, and the top of the foreign matter deposition trough 120 is provided with a slide rail 123 slidably connected to the first chute 116. The foreign matter deposition trough 120 is slidably installed on the trough body 110 through the slide rail 123 and the first chute 116, which is easy to load and unload. Figure 2 As shown. In order to achieve a movable seal at the connection between the foreign matter deposition trough 120 and the trough body 110, this embodiment sets a sealant on the periphery of the slide rail 123; in order to prevent the foreign matter deposition trough 120 from changing its position when it is not necessary to remove the foreign matter deposition trough 120 during normal operation, this embodiment can set a locking mechanism at both ends of the first slide trough 116 to limit the position of both ends of the slide rail 123. The locking mechanism has two states, locked and unlocked, and can be a manual locking mechanism or an electric locking mechanism. It should be noted that the locking mechanism of this embodiment is a preference made to prevent the position deviation of the foreign matter deposition trough 120 from causing solvent leakage, and is not a limitation of the present invention.

[0045] The specific working principle of this embodiment is as follows:

[0046] When it is determined that the foreign matter or sediment in the foreign matter deposition trough 120 needs to be cleaned, the movable baffle 130 is closed to isolate the environment inside the trough body 110 from the environment inside the foreign matter deposition trough 120, the state of the locking mechanism is switched to the unlocked state, and the foreign matter deposition trough 120 is slid so that the foreign matter deposition trough 120 is separated from the trough body 110, and the sliding operation is simple and fast; when the cleaning is completed, the foreign matter deposition trough 120 is slid back into the first slide groove 116, and when the foreign matter deposition trough 120 slides into place, the state of the locking mechanism is switched to the locked state to prevent the position of the foreign matter deposition trough 120 from shifting and causing solvent leakage.

[0047] Example 4

[0048] This embodiment is a second embodiment of the extraction tank 100 for the diaphragm 200 of the present invention. The tank body 110 is provided with a second chute 117, and the baffle 130 is provided with a sliding block 131. The sliding block 131 is slidably connected to the second chute 117. Figure 3 The second sliding groove 117 and the sliding block 131 cooperate to achieve stable sliding of the baffle 130, thereby preventing the position deviation of the baffle 130 from affecting the isolation of the foreign matter deposition tank 120 and the environment inside the tank body 110.

[0049] In order to achieve a better sealing effect, this embodiment may set a sealing strip on the edge of the baffle 130. When the baffle 130 is in a closed state, the sealing strip is squeezed between the baffle 130 and the inner wall of the trough body 110 or the inner wall of the foreign matter deposition trough 120 to ensure a better isolation effect.

[0050] The baffle 130 in this embodiment can slide manually or electrically.

[0051] When manually sliding, the sliding block 131 can be specifically disposed at the bottom of the baffle 130. The second chute 117 is specifically defined in the chute bottom plate 115. The sliding block 131 partially extends out of the second chute 117, not only improving the sliding stability of the baffle 130 but also serving as a manual operating unit. Manually sliding the sliding block 131 switches the baffle 130 between an open and closed state. The switching point between the open and closed states of the baffle 130 is generally determined manually by the operator. For example, a transparent observation window can be provided on the side wall of the foreign matter deposition trough 120 to observe the foreign matter deposition situation.

[0052] During electric sliding, a level sensor is installed within the foreign matter deposition trough 120. The level sensor is connected to a controller, which is connected to a driver. The driver is mounted on the trough body 110, and the output of the driver is connected to the baffle 130. The level sensor monitors the location of deposited foreign matter within the foreign matter deposition trough 120. When the level of the deposited foreign matter exceeds a set level, the controller sends a signal to the driver, thereby automatically switching the baffle 130 between an open and closed state. During electric sliding, the second chute 117 can be provided in the trough bottom plate 115 or the trough side plate 114. Correspondingly, the sliding block 131 can be provided at the bottom or the side of the baffle 130.

[0053] Example 5

[0054] This embodiment is an embodiment of an extraction device having the extraction tank 100 described in the first to fourth embodiments, including a plurality of conveying rollers and a plurality of extraction tanks 100 for the membrane as described above, and the membrane 200 sequentially passes around the periphery of the plurality of conveying rollers, such as Figure 4 When this embodiment is implemented, the membrane 200 is transported by a conveying roller, and the membrane 200 exchanges and extracts with the solvent in the extraction tank 100 during the transport process, thereby achieving the purpose of pore formation or membrane formation.

[0055] Specifically, in this embodiment, the conveying rollers include a driving roller 400 and a driven roller 500. The driving roller 400 is driven by a motor. Each extraction tank 100 has a corresponding driving roller 400 and driven roller 500. The driving rollers 400 are connected to the motor. The connection between the driving rollers can be adjusted by speed measurement to achieve synchronized movement. The driven rollers 500 can be connected by a transmission mechanism such as a belt or chain to achieve synchronized movement.

[0056] In this embodiment, some conveyor rollers are located within the extraction tank 100, while some transmission rollers are located outside the extraction tank 100. In this embodiment, the lowest points or center points of the conveyor rollers within the extraction tank 100 can be arranged on the same horizontal line. This arrangement of conveyor rollers can reduce the depth of each extraction tank 100. A deeper extraction tank 100 results in a smaller amount of solvent, allowing for better control of concentration. This effectively reduces solvent waste and saves production costs.

[0057] Furthermore, existing extraction tanks 100 typically adopt a parallel, linear design, which occupies a large space, is long, and makes observation difficult. In this embodiment, several extraction tanks 100 are vertically spaced apart; the multiple extraction tanks 100 are distributed vertically, specifically in a stepped arrangement. This effectively utilizes the upper space, reduces the length of the production line, and facilitates observation. The solvent concentration within the extraction tanks 100 gradually decreases along the direction of transport of the membrane 200.

[0058] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A membrane extraction tank (100), characterized in that: The invention comprises a trough body (110) and a foreign matter sedimentation trough (120) connected to the bottom of the trough body (110); the foreign matter sedimentation trough (120) is detachably connected to the trough body (110); and a baffle (130) having an open state and a closed state is provided at the connection point between the trough body (110) and the foreign matter sedimentation trough (120).

2. The membrane extraction tank (100) according to claim 1, characterized in that: A water inlet (111) and a water outlet (112) are respectively provided on both sides of the trough body (110), and the water outlet (112) is arranged lower than the water inlet (111); a slag discharge port (113) is provided on the trough body (110) near the water outlet (112), and the foreign matter sedimentation trough (120) is detachably connected to the slag discharge port (113).

3. The membrane extraction tank (100) according to claim 1, characterized in that: The trough body (110) comprises a trough bottom plate (115) and a trough side plate (114) connected to the trough bottom plate (115). The trough bottom plate (115) is inclined and a slag discharge port (113) is provided at one end of the trough bottom plate (115).

4. The membrane extraction tank (100) according to claim 3, characterized in that: The inclination angle of the trough bottom plate (115) is 30° to 90°.

5. The membrane extraction tank (100) according to claim 1, characterized in that: The trough body (110) is provided with a first chute (116), and the top of the foreign matter deposition trough (120) is provided with a slide rail (123) slidably connected to the first chute (116).

6. The membrane extraction tank (100) according to claim 5, characterized in that: Locking mechanisms for limiting the position of the foreign matter deposition trough (120) are provided at both ends of the first chute (116).

7. The extraction tank (100) for a diaphragm according to any one of claims 1 to 6, characterized in that: The trough body (110) is provided with a second sliding groove (117), and the baffle (130) is provided with a sliding block (131), and the sliding block (131) is slidably connected to the second sliding groove (117).

8. The extraction tank (100) for a diaphragm according to any one of claims 1 to 6, characterized in that: A material level sensor is provided in the foreign matter sedimentation tank (120), the material level sensor is connected to a controller, the controller is connected to a driver, the driver is mounted on the tank body (110), and the output end of the driver is connected to the baffle (130).

9. An extraction device, characterized in that: The invention comprises a plurality of conveying rollers and a plurality of extraction tanks (100) for diaphragms according to any one of claims 1 to 8, wherein the diaphragms (200) are sequentially passed around the outer peripheries of the plurality of conveying rollers.

10. The extraction device according to claim 9, characterized in that A plurality of extraction tanks (100) are vertically spaced apart.

Images