Diaphragm processing device, roll core and roll core processing method

Abstract

The invention discloses a diaphragm processing device, a roll core and a roll core processing method. The diaphragm processing device comprises a rack, a first mechanism and a second mechanism, and the first mechanism is arranged on the rack; the second mechanism is used for driving the first end of the first diaphragm to be bent to be partially overlapped and driving the first end of the second diaphragm to be bent to be partially overlapped; according to the diaphragm processing device, the first diaphragm and the second diaphragm can be separated through the first mechanism, bending of the first diaphragm and the second diaphragm is facilitated, and the first diaphragm is bent through the second mechanism, so that the first end of the first diaphragm and the first end of the second diaphragm are partially stacked to form a double-layer effect; therefore, the corners of the pole piece are prevented from puncturing the diaphragm, the overall thickness of the diaphragm is not influenced, normal ion exchange between the positive pole piece and the negative pole piece is ensured, the service life of the battery is prolonged, and the safety is also improved.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a diaphragm processing apparatus, a core, and a core processing method. Background Technology

[0002] In existing winding heads, the positive and negative electrode sheets are separated by a separator. When the positive and negative electrode sheets are introduced at right angles, the curvature tension will puncture the separator, causing a short circuit and heat generation, which further expands the separator molten hole. This not only reduces the battery life but also may lead to battery explosion and fire safety accidents. Summary of the Invention

[0003] This application provides a diaphragm processing apparatus, a core, and a core processing method to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a diaphragm processing apparatus is provided for processing a first diaphragm and a second diaphragm. The apparatus includes a frame, a first mechanism, and a second mechanism. The first mechanism is disposed on the frame to separate at least a portion of the first diaphragm and at least a portion of the second diaphragm. The second mechanism is connected to the frame and is used to bend a first end of the first diaphragm to partially overlap and to bend a first end of the second diaphragm to partially overlap.

[0005] In the separator processing apparatus of this application embodiment, the first end is the starting end of the separator. The first mechanism can separate the first separator and the second separator, which facilitates the bending of the first separator and the second separator. The second mechanism bends the first separator, thereby stacking the first end portion of the first separator to form a double-layer effect. The second mechanism bends the second separator, thereby stacking the first end portion of the second separator to form a double-layer effect. Therefore, it can prevent the corners of the electrode from piercing the separator, and at the same time, it will not affect the overall thickness of the separator, ensuring normal ion exchange between the positive electrode and the negative electrode, improving the battery's service life and safety.

[0006] In some embodiments, the first mechanism includes a first component and a second component, at least a portion of the first component being movably connected to the frame to move a second end of the first diaphragm toward a side away from the second diaphragm; and at least a portion of the second component being movably connected to the frame to move a second end of the second diaphragm toward a side away from the first diaphragm.

[0007] In this way, the first and second diaphragms can be separated before bending, allowing the first end of the first diaphragm to bend smoothly to form an overlapping portion, while avoiding bending the first diaphragm to the surface of the second diaphragm; similarly, the first end of the second diaphragm can be bent smoothly to form an overlapping portion, while avoiding bending the second diaphragm to the surface of the first diaphragm, thus avoiding interference between the first and second diaphragms during the bending process.

[0008] In some embodiments, the second mechanism includes a first clamping plate and a second clamping plate, wherein the first clamping plate is movably connected to the frame to drive a first end of the first diaphragm to wrap around the first component, such that the first diaphragm is bent to partially overlap; and the second clamping plate is movably connected to the frame to drive a first end of the second diaphragm to wrap around the second component, such that the second diaphragm is bent to partially overlap.

[0009] Thus, the first clamp can cooperate with the first component, allowing the first diaphragm to be bent flat and overlapped, so as to avoid wrinkles in the overlapping part and prevent the exchange of active materials on the electrode from being affected; similarly, the second clamp can cooperate with the second component, allowing the second diaphragm to be bent flat and overlapped, so as to avoid wrinkles in the overlapping part and prevent the exchange of active materials on the electrode from being affected.

[0010] In some embodiments, the second mechanism further includes a connector, to which both the first clamping plate and the second clamping plate are connected. The connector is movably connected to the frame to drive the first clamping plate and the second clamping plate to move along a first direction.

[0011] Thus, by setting up a connector, the first clamping plate and the second clamping plate can be moved simultaneously, thereby improving the folding efficiency of the first diaphragm and the second diaphragm.

[0012] In this way, the folded portion of the first diaphragm can be made consistent with the folded portion of the second diaphragm, thereby avoiding uneven overall thickness due to different overlapping portions.

[0013] In some embodiments, the connector drives the first clamping plate and the second clamping plate to move along a first direction to a height above the first mechanism, wherein the height of the first clamping plate and the second clamping plate relative to the first mechanism is less than or equal to 100 mm.

[0014] In other words, during the process of the connector driving the first clamping plate and the second clamping plate to move, the part of the first clamping plate that exceeds the first mechanism is the length of the first diaphragm overlap. Similarly, the part of the second clamping plate that exceeds the first mechanism is the length of the second diaphragm overlap. That is, the length of the overlap of the first diaphragm is less than or equal to 100mm, and the length of the overlap of the second diaphragm is less than or equal to 100mm. This ensures that the corners of the electrode sheet are wrapped, and the overlap is not too long, which would affect the overall thickness of the core.

[0015] In some embodiments, the first clamping plate is connected to a vacuum adsorption device for adsorbing the first diaphragm onto the first clamping plate; and / or, the second clamping plate is connected to a vacuum adsorption device for adsorbing the second diaphragm onto the second clamping plate.

[0016] Thus, by setting up the vacuum adsorption device, it is possible to ensure that the first diaphragm is adsorbed on the first clamping plate, so that the first clamping plate can smoothly drive the first diaphragm to move and bend until it overlaps; similarly, it is possible to ensure that the second diaphragm is adsorbed on the second clamping plate, so that the second clamping plate can smoothly drive the second diaphragm to move and bend until it overlaps.

[0017] It should also be noted that the inner side of the first clamping plate and the inner side of the second clamping plate are connected to a vacuum adsorption device, so that the first end of the first diaphragm is adsorbed on the first clamping plate and the first end of the second diaphragm is adsorbed on the second clamping plate, while the second end of the first diaphragm is wound on a take-up roller. Similarly, the second end of the second diaphragm is also wound on another take-up roller.

[0018] In some embodiments, along the second direction, the first clamping plate and the second clamping plate are movably connected to the connector, and the first clamping plate and the second clamping plate are movable toward or away from each other, so that the first diaphragm and the second diaphragm are clamped between the first clamping plate and the second clamping plate.

[0019] Thus, when the first clamping plate and the second clamping plate drive the first diaphragm and the second diaphragm to be clamped between the first clamping plate and the second clamping plate, the first diaphragm and the second diaphragm can be easily cut before processing, so as to form the first end.

[0020] In some embodiments, the first component includes a first base and a first mating member, the first base being movably connected to the frame and movable along a second direction; and the first mating member being connected to the first base, the first mating member being movably connected to the first base and movable along a third direction; and / or, The second component includes a second base and a second mating member. The second base is movably connected to the frame and is movable along a second direction. The second mating member is connected to the second base and is movably connected to the second base and is movable along a third direction, wherein the third direction intersects both the first direction and the second direction.

[0021] In other words, the first mating component can slide on the first base, thereby adjusting the length of the first mating component extending from the first base to better adapt to diaphragms of different widths, thus making the equipment more versatile; similarly, the second mating component can slide on the second base, thereby adjusting the length of the second mating component extending from the second base to better adapt to diaphragms of different widths, thus making the equipment more versatile.

[0022] According to a second aspect of this disclosure, a winding core is provided, comprising a first diaphragm, a second diaphragm, and an electrode sheet, wherein a first end portion of the first diaphragm overlaps to form a first overlapping portion; a first end portion of the second diaphragm overlaps to form a second overlapping portion; and a first end of the electrode sheet is sandwiched between the first overlapping portion and the second overlapping portion.

[0023] It should also be noted that, in this embodiment, the diaphragm processing device is used for the preparation work of the first diaphragm and the second diaphragm before winding. Specifically, during winding, after the first diaphragm and the second diaphragm are overlapped, the electrode is placed between the first diaphragm and the second diaphragm, and after the first mating part and the second mating part are combined, the first diaphragm, the second diaphragm and the electrode can be wound to form a core.

[0024] According to a third aspect of this disclosure, a method for processing a core is provided, the method comprising a diaphragm processing apparatus, and further comprising: The first mechanism at least partially separates the first diaphragm and the second diaphragm; The first diaphragm is bent and the second diaphragm is bent such that the first end portions of the first diaphragm overlap to form a first overlapping portion, and the first end portions of the second diaphragm overlap to form a second overlapping portion. An electrode is sandwiched between the first diaphragm and the second diaphragm, wherein the first end of the electrode is sandwiched between the first overlapping portion and the second overlapping portion.

[0025] The core processing method of this application embodiment has a first end as the starting end of the separator. The first mechanism can separate the first separator and the second separator, which facilitates the bending of the first separator and the second separator. The second mechanism bends the first separator, thereby stacking the first end portion of the first separator to form a double-layer effect. The second mechanism bends the second separator, thereby stacking the first end portion of the second separator to form a double-layer effect. Therefore, it can prevent the corners of the electrode from piercing the separator, and at the same time, it will not affect the overall thickness of the separator, ensuring normal ion exchange between the positive electrode and the negative electrode, improving the battery's service life and safety.

[0026] In some embodiments, bending the first diaphragm such that the first ends of the first diaphragm overlap to form a first overlapping portion, and causing the first ends of the second diaphragm to overlap to form a second overlapping portion, includes: The first mechanism is disposed between the first diaphragm and the second diaphragm, and the first component and the second component of the first mechanism are far apart from each other to separate the first diaphragm and the second diaphragm; The second mechanism, located below the first mechanism, fixes the second end of the first diaphragm and the second end of the second diaphragm, and moves the second end of the first diaphragm and the second end of the second diaphragm above the first mechanism; The first component and the second component of the first mechanism are close to each other, and the first clamping plate and the second clamping plate of the second mechanism are far apart from each other, so as to fold the first diaphragm and fold the second diaphragm.

[0027] In this way, the first and second diaphragms can be separated before bending, allowing the first end of the first diaphragm to bend smoothly to form an overlapping portion, while avoiding bending the first diaphragm to the surface of the second diaphragm; similarly, the first end of the second diaphragm can be bent smoothly to form an overlapping portion, while avoiding bending the second diaphragm to the surface of the first diaphragm, thus avoiding interference between the first and second diaphragms during the bending process.

[0028] Furthermore, the first component and the second component are close to each other, while the first clamping plate and the second clamping plate are far apart from each other, so that both the first diaphragm and the second diaphragm are in a straight state, allowing the first diaphragm and the second diaphragm to bend flat to overlap, so as to avoid wrinkles in the overlapping part and prevent the exchange of active materials on the electrode from being affected.

[0029] In some embodiments, the first component and the second component of the first mechanism are close to each other, and the first clamping plate and the second clamping plate of the second mechanism are far apart from each other, to fold the first diaphragm, and folding the second diaphragm includes: The first component and the second component of the first mechanism are brought close to each other until they abut against each other, so as to overlap the first overlapping portion and the second overlapping portion.

[0030] In this way, the first and second components approach each other until they come into contact, allowing the first and second separators to fit together to form a closed port. This prevents the electrode from extending beyond the first or second separator during insertion, ensuring that the first and second separators can wrap around the electrode without puncturing it. This improves the battery's lifespan and safety performance.

[0031] In the separator processing apparatus of this application embodiment, the first end is the starting end of the separator. The first mechanism can separate the first separator and the second separator, which facilitates the bending of the first separator and the second separator. The second mechanism bends the first separator, thereby stacking the first end portion of the first separator to form a double-layer effect. The second mechanism bends the second separator, thereby stacking the first end portion of the second separator to form a double-layer effect. Therefore, it can prevent the corners of the electrode from piercing the separator, and at the same time, it will not affect the overall thickness of the separator, ensuring normal ion exchange between the positive electrode and the negative electrode, improving the battery's service life and safety.

[0032] In the core of this application embodiment, a double-layer effect is formed by stacking the first end portion of the first separator and the first end portion of the second separator. Therefore, it is possible to prevent the corners of the electrode from piercing the separator, and at the same time, it will not affect the overall thickness of the separator, ensuring normal ion exchange between the positive and negative electrodes, improving the battery's lifespan and safety.

[0033] The core processing method of this application embodiment has a first end as the starting end of the separator. The first mechanism can separate the first separator and the second separator, which facilitates the bending of the first separator and the second separator. The second mechanism bends the first separator, thereby stacking the first end portion of the first separator to form a double-layer effect. The second mechanism bends the second separator, thereby stacking the first end portion of the second separator to form a double-layer effect. Therefore, it can prevent the corners of the electrode from piercing the separator, and at the same time, it will not affect the overall thickness of the separator, ensuring normal ion exchange between the positive electrode and the negative electrode, improving the battery's service life and safety. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0036] Figure 1 This is an overall schematic diagram of the diaphragm processing apparatus provided in an exemplary embodiment of this disclosure in a first state; Figure 2 This is an overall schematic diagram of the diaphragm processing apparatus provided in the exemplary embodiments of this disclosure in the second state; Figure 3 This is a schematic diagram of the diaphragm processing apparatus provided in an exemplary embodiment of this disclosure in a third state; Figure 4 This is a schematic diagram of the diaphragm processing apparatus provided in the exemplary embodiments of this disclosure in the fourth state; Figure 5 This is a flowchart of a core processing method provided in an exemplary embodiment of this disclosure.

[0037] Explanation of reference numerals in the attached figures: 1. Diaphragm processing equipment; 11. Rack; 12. First mechanism; 121. First component; 1211. First base; 1212. First mating part; 122. Second component; 1221. Second base; 1222. Second mating part; 13. Second mechanism; 131. First clamping plate; 132. Second clamping plate; 133. Connecting component; 2. First diaphragm; 3. Second diaphragm; 4. Electrode; A. First end; B. The second end. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0039] The winding process in cylindrical battery manufacturing is one of the most important steps and is crucial to battery performance. Cylindrical battery winding generally includes positive and negative electrode sheets 4 and upper and lower separators, which are wound in sequence: negative electrode, upper separator, positive electrode, and lower separator. The relative state of the pre-wound separator and electrode sheets 4 at the core head directly affects the battery's electrical and safety performance. Because the positive and negative electrode sheets 4 are cut at right angles, there is curvature tension inside the core, which causes wear on the single-layer separator at the right angle of the electrode sheet 4. This wear gradually increases during use, forming a melting hole phenomenon, which not only reduces the battery's lifespan but also may lead to battery explosion and fire safety accidents.

[0040] This application provides a diaphragm processing apparatus 1, a core, and a core processing method. Please refer to [link to relevant documentation]. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the diaphragm processing apparatus 1 provided in an embodiment of this application.

[0041] Reference Figures 1 to 4 As shown, the diaphragm processing apparatus 1 is used to process a first diaphragm 2 and a second diaphragm 3. It includes a frame 11, a first mechanism 12 and a second mechanism 13. The first mechanism 12 is disposed on the frame 11 to separate at least a portion of the first diaphragm 2 and at least a portion of the second diaphragm 3. The second mechanism 13 is connected to the frame 11 and is used to drive the first end A of the first diaphragm 2 to bend to partially overlap, and drive the first end A of the second diaphragm 3 to bend to partially overlap.

[0042] In the diaphragm processing apparatus 1 of this application embodiment, the first end A is the starting end of the diaphragm. The first diaphragm 2 and the second diaphragm 3 can be separated by the first mechanism 12, which facilitates the bending of the first diaphragm 2 and the second diaphragm 3. The first diaphragm 2 is bent by the second mechanism 13, thereby forming a double-layer effect by stacking the first end A portion of the first diaphragm 2. The second diaphragm 3 is bent by the second mechanism 13, thereby forming a double-layer effect by stacking the first end A portion of the second diaphragm 3. Therefore, it can prevent the corners of the electrode 4 from piercing the diaphragm, and at the same time, it will not affect the overall thickness of the diaphragm, ensuring normal ion exchange between the positive electrode 4 and the negative electrode 4, improving the battery's service life and safety.

[0043] Reference Figure 1 and Figure 2 As shown, in some embodiments, the first mechanism 12 includes a first component 121 and a second component 122. At least a portion of the first component 121 is movably connected to the frame 11 to move the second end B of the first diaphragm 2 away from the second diaphragm 3; and at least a portion of the second component 122 is movably connected to the frame 11 to move the second end B of the second diaphragm 3 away from the first diaphragm 2.

[0044] Thus, before the first diaphragm 2 and the second diaphragm 3 are bent, the first diaphragm 2 and the second diaphragm 3 can be separated, so that the first end A of the first diaphragm 2 can be bent smoothly to form the overlapping part, while avoiding the first diaphragm 2 bending to the surface of the second diaphragm 3; similarly, the first end A of the second diaphragm 3 can be bent smoothly to form the overlapping part, while avoiding the second diaphragm 3 bending to the surface of the first diaphragm 2, that is, interference between the first diaphragm 2 and the second diaphragm 3 during the bending process can be avoided.

[0045] In some embodiments, the second mechanism 13 includes a first clamping plate 131 and a second clamping plate 132. The first clamping plate 131 is movably connected to the frame 11 to drive the first end A of the first diaphragm 2 to wrap around the first component 121, so that the first diaphragm 2 is bent to partially overlap. The second clamping plate 132 is movably connected to the frame 11 to drive the first end A of the second diaphragm 3 to wrap around the second component 122, so that the second diaphragm 3 is bent to partially overlap.

[0046] Thus, the first clamping plate 131 can cooperate with the first component 121, allowing the first diaphragm 2 to be bent flat and overlapped, so as to avoid wrinkles in the overlapping part and prevent the exchange of active material in the electrode 4 from being affected; similarly, the second clamping plate 132 can cooperate with the second component 122, allowing the second diaphragm 3 to be bent flat and overlapped, so as to avoid wrinkles in the overlapping part and prevent the exchange of active material in the electrode 4 from being affected.

[0047] In some embodiments, the second mechanism 13 further includes a connector 133, to which the first clamping plate 131 and the second clamping plate 132 are both connected. The connector 133 is movably connected to the frame 11 to drive the first clamping plate 131 and the second clamping plate 132 to move along a first direction.

[0048] Thus, by setting a connector 133, the first clamping plate 131 and the second clamping plate 132 can be moved simultaneously, thereby improving the folding efficiency of the first diaphragm 2 and the second diaphragm 3.

[0049] In this way, the folded portion of the first diaphragm 2 can be made consistent with the folded portion of the second diaphragm 3, thereby avoiding uneven overall thickness due to different overlapping portions.

[0050] In some embodiments, the connector 133 drives the first clamping plate 131 and the second clamping plate 132 to move along a first direction to a height above the first mechanism 12, wherein the height of the first clamping plate 131 and the second clamping plate 132 relative to the first mechanism 12 is less than or equal to 100 mm.

[0051] In other words, during the process of the connector 133 driving the first clamping plate 131 and the second clamping plate 132 to move, the part of the first clamping plate 131 that exceeds the first mechanism 12 is the length of the first diaphragm 2 overlap. Similarly, the part of the second clamping plate 132 that exceeds the first mechanism 12 is the length of the second diaphragm 3 overlap. That is, the length of the overlapping part of the first diaphragm 2 is less than or equal to 100mm, and the length of the overlapping part of the second diaphragm 3 is less than or equal to 100mm. This ensures that the corners of the electrode sheet 4 are wrapped, and the overlapping part is not too long, which would affect the overall thickness of the core.

[0052] It is understood that in this embodiment, the height difference between the first clamping plate 131 and the second clamping plate 132 and the first mechanism 12 is 50mm. However, this design is not limited to this. In other embodiments, the height difference between the first clamping plate 131 and the second clamping plate 132 and the first mechanism 12 can be any one or any two of the following: 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, and 100mm. This allows for setting different overlap lengths based on the actual size of the electrode sheet used, thus enhancing practicality.

[0053] In some embodiments, the first clamping plate 131 is connected to a vacuum adsorption device for adsorbing the first diaphragm 2 onto the first clamping plate 131; and / or, the second clamping plate 132 is connected to a vacuum adsorption device for adsorbing the second diaphragm 3 onto the second clamping plate 132.

[0054] Thus, by setting up the vacuum adsorption device, it is possible to ensure that the first diaphragm 2 is adsorbed on the first clamping plate 131, so that the first clamping plate 131 can smoothly drive the first diaphragm 2 to move and bend until it overlaps; similarly, it is possible to ensure that the second diaphragm 3 is adsorbed on the second clamping plate 132, so that the second clamping plate 132 can smoothly drive the second diaphragm 3 to move and bend until it overlaps.

[0055] It should also be noted that the inner side of the first clamping plate 131 and the inner side of the second clamping plate 132 are connected to a vacuum adsorption device, so that the first end A of the first diaphragm 2 is adsorbed on the first clamping plate 131 and the first end A of the second diaphragm 3 is adsorbed on the second clamping plate 132, while the second end B of the first diaphragm 2 is wound on a take-up roller. Similarly, the second end B of the second diaphragm 3 is also wound on another take-up roller.

[0056] In some embodiments, along the second direction, the first clamping plate 131 and the second clamping plate 132 are movably connected to the connector 133, and the first clamping plate 131 and the second clamping plate 132 can move toward or away from each other so that the first diaphragm 2 and the second diaphragm 3 are clamped between the first clamping plate 131 and the second clamping plate 132.

[0057] Thus, when the first clamping plate 131 and the second clamping plate 132 drive the first diaphragm 2 and the second diaphragm 3 to be clamped between the first clamping plate 131 and the second clamping plate 132, the first diaphragm 2 and the second diaphragm 3 can be easily cut before processing, so as to form the first end A.

[0058] In some embodiments, the first component 121 includes a first base 1211 and a first mating member 1212, the first base 1211 being movably connected to the frame 11 and movable along a second direction; and the first mating member 1212 being connected to the first base 1211, the first mating member 1212 being movably connected to the first base 1211 and movable along the second direction; and / or, The second component 122 includes a second base 1221 and a second mating member 1222. The second base 1221 is movably connected to the frame 11 and is movable along a second direction. The second mating member 1222 is connected to the second base 1221 and is movable along a third direction, wherein the third direction intersects both the first and second directions.

[0059] In other words, the first mating part 1212 can slide on the first base 1211, thereby adjusting the length of the first mating part 1212 extending out of the first base 1211 to better adapt to diaphragms of different widths, thus increasing the versatility of the equipment; similarly, the second mating part 1222 can slide on the second base 1221, thereby adjusting the length of the second mating part 1222 extending out of the second base 1221 to better adapt to diaphragms of different widths, thus increasing the versatility of the equipment.

[0060] According to a second aspect of this disclosure, a core is provided, comprising a first diaphragm 2, a second diaphragm 3, and an electrode 4, wherein the first end A of the first diaphragm 2 overlaps to form a first overlapping portion; the first end A of the second diaphragm 3 overlaps to form a second overlapping portion; and the first end A of the electrode 4 is sandwiched between the first overlapping portion and the second overlapping portion.

[0061] In the core of this application embodiment, a double-layer effect is formed by stacking the first end A portion of the first separator 2 and the first end A portion of the second separator 3. Therefore, it can prevent the corners of the electrode 4 from piercing the separator, and at the same time, it will not affect the overall thickness of the separator, ensuring normal ion exchange between the positive electrode and the negative electrode, improving the battery's service life and safety.

[0062] It should also be noted that, in this embodiment, the diaphragm processing device is used for the preparation work of the first diaphragm 2 and the second diaphragm 3 before winding. Specifically, during winding, after the first diaphragm 2 and the second diaphragm 3 are overlapped, the electrode 4 is placed between the first diaphragm 2 and the second diaphragm 3, and after the first mating member 1212 and the second mating member 1222 are combined, the first diaphragm 2, the second diaphragm 3 and the electrode 4 can be wound to form a core.

[0063] According to the third aspect of this disclosure, referring to Figure 5 As shown, a method for processing a core is provided. The method includes a diaphragm processing apparatus 1, and further includes: The first mechanism 12 at least partially separates the first diaphragm 2 and the second diaphragm 3; The first diaphragm 2 and the second diaphragm 3 are bent so that the first end A of the first diaphragm 2 overlaps to form a first overlapping portion, and the first end A of the second diaphragm 3 overlaps to form a second overlapping portion. The electrode 4 is sandwiched between the first diaphragm 2 and the first diaphragm 2, wherein the first end A of the electrode 4 is sandwiched between the first overlapping portion and the second overlapping portion.

[0064] In the core processing method of this application embodiment, the first end A is the starting end of the separator. The first mechanism 12 can separate the first separator 2 and the second separator 3, which facilitates the bending of the first separator 2 and the second separator 3. The second mechanism 13 bends the first separator 2, thereby stacking the first end A portion of the first separator 2 to form a double-layer effect. The second mechanism 13 bends the second separator 3, thereby stacking the first end A portion of the second separator 3 to form a double-layer effect. Therefore, it can prevent the corners of the electrode 4 from piercing the separator, and at the same time, it will not affect the overall thickness of the separator, ensuring normal ion exchange between the positive electrode 4 and the negative electrode 4, improving the battery's service life and safety.

[0065] In some embodiments, bending the first diaphragm 2 such that the first end A portion of the first diaphragm 2 overlaps to form a first overlapping portion, and causing the first end portion of the second diaphragm 3 to overlap to form a second overlapping portion, includes: The first mechanism 12 is disposed between the first diaphragm 2 and the second diaphragm 3, with the first component 121 and the second component 122 of the first mechanism 12 being far apart from each other to separate the first diaphragm 2 and the second diaphragm 3. The second mechanism 13, located below the first mechanism 12, fixes the second end B of the first diaphragm 2 and the second end B of the second diaphragm 3, and moves the second end B of the first diaphragm 2 and the second end B of the second diaphragm 3 to above the first mechanism 12; The first component 121 and the second component 122 of the first mechanism 12 are close to each other, and the first clamping plate 131 and the second clamping plate 132 of the second mechanism 13 are far apart from each other, so as to fold the first diaphragm 2 and fold the second diaphragm 3.

[0066] Thus, before the first diaphragm 2 and the second diaphragm 3 are bent, the first diaphragm 2 and the second diaphragm 3 can be separated, so that the first end A of the first diaphragm 2 can be bent smoothly to form the overlapping part, while avoiding the first diaphragm 2 bending to the surface of the second diaphragm 3; similarly, the first end A of the second diaphragm 3 can be bent smoothly to form the overlapping part, while avoiding the second diaphragm 3 bending to the surface of the first diaphragm 2, that is, interference between the first diaphragm 2 and the second diaphragm 3 during the bending process can be avoided.

[0067] Furthermore, the first component 121 and the second component 122 are close to each other, while the first clamping plate 131 and the second clamping plate 132 are far apart from each other, so that the first diaphragm 2 and the second diaphragm 3 are both in a straight state, allowing the first diaphragm 2 and the second diaphragm 3 to be bent flat to overlap, so as to avoid wrinkles in the overlapping part and prevent the exchange of active material on the electrode 4 from being affected.

[0068] In some embodiments, the first component 121 and the second component 122 of the first mechanism 12 are close to each other, and the first clamping plate 131 and the second clamping plate 132 of the second mechanism 13 are far apart from each other, so that folding the first diaphragm 2 and folding the second diaphragm 3 includes: The first component 121 and the second component 122 of the first mechanism 12 approach each other until they abut each other, so as to overlap the first overlapping portion and the second overlapping portion.

[0069] In this way, the first component 121 and the second component 122 approach each other until they come into contact, which allows the first separator 2 and the second separator 3 to fit together to form a closed port. This prevents the electrode 4 from extending beyond the first separator 2 or the second separator 3 during insertion, ensuring that the first separator 2 and the second separator 3 can wrap around the electrode 4, but the electrode 4 will not puncture the first separator 2 and the second separator 3, thus improving the battery's lifespan and safety performance.

[0070] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0071] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0072] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0073] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A diaphragm processing apparatus (1) for processing a first diaphragm (2) and a second diaphragm (3), characterized in that, include: Rack (11); A first mechanism (12), disposed on the frame (11), separates at least a portion of the first diaphragm (2) and at least a portion of the second diaphragm (3); and, The second mechanism (13) is connected to the frame (11). The second mechanism (13) is used to drive the first end of the first diaphragm (2) to bend to partially overlap, and to drive the first end of the second diaphragm (3) to bend to partially overlap.

2. The diaphragm processing apparatus according to claim 1, characterized in that, The first mechanism (12) includes: A first component (121), at least a portion of which is movably connected to the frame (11), drives the second end of the first diaphragm (2) to move away from the second diaphragm (3); and, The second component (122), at least a portion of which is movably connected to the frame (11), drives the second end of the second diaphragm (3) to move away from the first diaphragm (2).

3. The diaphragm processing apparatus according to claim 2, characterized in that, The second agency (13) includes: A first clamping plate (131), movably connected to the frame (11), drives the first end of the first diaphragm (2) to wrap around the first assembly (121), so that the first diaphragm (2) is bent to partially overlap; and, The second clamping plate (132) is movably connected to the frame (11) to drive the first end of the second diaphragm (3) to be wrapped around the second component (122) so that the second diaphragm (3) is bent to partially overlap.

4. The diaphragm processing apparatus according to claim 3, characterized in that, The second mechanism (13) further includes a connector (133), to which the first clamping plate (131) and the second clamping plate (132) are connected. The connector (133) is movably connected to the frame (11) to drive the first clamping plate (131) and the second clamping plate (132) to move along the first direction.

5. The diaphragm processing apparatus according to claim 4, characterized in that, The connector (133) drives the first clamping plate (131) and the second clamping plate (132) to move along the first direction to a height higher than the first mechanism (12), wherein the height of the first clamping plate (131) and the second clamping plate (132) relative to the first mechanism (12) is less than or equal to 100mm.

6. The diaphragm processing apparatus according to claim 3, characterized in that, The first clamping plate (131) is connected to a vacuum adsorption device for adsorbing the first diaphragm (2) onto the first clamping plate (131); and / or, The second clamp (132) is connected to a vacuum adsorption device for adsorbing the second diaphragm (3) onto the second clamp (132).

7. The diaphragm processing apparatus according to claim 4, characterized in that, The first clamping plate (131) and the second clamping plate (132) are movably connected to the connector (133). The first clamping plate (131) and the second clamping plate (132) can move towards or away from each other so that the first diaphragm (2) and the second diaphragm (3) are clamped between the first clamping plate (131) and the second clamping plate (132).

8. The diaphragm processing apparatus according to any one of claims 2-7, characterized in that, The first component (121) includes: A first base (1211) is movably connected to the frame (11) and is movable along a second direction; and, A first mating component (1212) is connected to the first base (1211), and is movably connected to the first base (1211) and capable of moving in a third direction; and / or, The second component (122) includes: The second base (1221), along the second direction, is movably connected to the frame (11) and is movable along the second direction; and, The second mating component (1222) is connected to the second base (1221). The second mating component (1222) is movably connected to the second base (1221) and can move along a third direction, wherein the third direction intersects both the first direction and the second direction.

9. A type of winding core, characterized in that, The diaphragm processing apparatus (1) according to any one of claims 1-8 comprises: The first diaphragm (2) has its first end portion overlapping to form a first overlapping portion; The second diaphragm (3) has its first end portion overlapping to form a second overlapping portion; and, The first end of the electrode (4) is sandwiched between the first overlapping portion and the second overlapping portion.

10. A method for processing a core, characterized in that, The diaphragm processing apparatus (1) according to any one of claims 1-8 comprises: The first mechanism (12) at least partially separates the first diaphragm (2) and the second diaphragm (3); The first diaphragm (2) and the second diaphragm (3) are bent so that the first end portion of the first diaphragm (2) overlaps to form a first overlapping portion, and the first end portion of the second diaphragm (3) overlaps to form a second overlapping portion; The electrode (4) is sandwiched between the first diaphragm (2) and the first diaphragm (2), wherein the first end of the electrode (4) is sandwiched between the first overlapping portion and the second overlapping portion.

11. The core processing method according to claim 10, characterized in that, The step of bending the first diaphragm (2) such that the first end portions of the first diaphragm (2) overlap to form a first overlapping portion, and the step of making the first end portions of the second diaphragm (3) overlap to form a second overlapping portion includes: The first mechanism (12) is disposed between the first diaphragm (2) and the second diaphragm (3), and the first component (121) and the second component (122) of the first mechanism (12) are far apart from each other to separate the first diaphragm (2) and the second diaphragm (3); The second mechanism (13), located below the first mechanism (12), fixes the second end of the first diaphragm (2) and the second end of the second diaphragm (3), and moves the second end of the first diaphragm (2) and the second end of the second diaphragm (3) above the first mechanism (12); The first component (121) and the second component (122) of the first mechanism (12) are close to each other, and the first clamping plate (131) and the second clamping plate (132) of the second mechanism (13) are far apart from each other, so as to fold the first diaphragm (2) and fold the second diaphragm (3).

12. The core processing method according to claim 11, characterized in that, The first component (121) and the second component (122) of the first mechanism (12) are close to each other, and the first clamping plate (131) and the second clamping plate (132) of the second mechanism (13) are far apart from each other, so as to fold the first diaphragm (2) and fold the second diaphragm (3) including: The first component (121) and the second component (122) of the first mechanism (12) are brought close to each other until they abut against each other, so as to overlap the first overlapping portion and the second overlapping portion.

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