Battery cell diaphragm detection device and battery cell preparation equipment

Abstract

The utility model discloses a battery cell diaphragm detection device and battery cell preparation equipment, and the battery cell diaphragm detection device comprises a quality detection assembly which is used for detecting and identifying at least one surface abnormal part of a battery cell diaphragm; the length metering assembly is used for metering the transmission length of the battery cell diaphragm from the surface abnormal part; the battery cell diaphragm sequentially passes through the quality detection assembly, the length metering assembly and the cutting assembly, the cutting assembly is used for cutting the battery cell diaphragm with the transmission length being metered to obtain the battery cell diaphragm with the length not smaller than the preset length and without the surface abnormal part, and the cutting assembly is further used for cutting off the battery cell diaphragm with the surface abnormal part. Through the cutting assembly, the normal battery cell diaphragm which can be used for lamination and conforms to the required lamination length is cut, and the abnormal battery cell diaphragm is cut off, so that the diaphragm containing an abnormal part is prevented from being used for laminating a roll core, meanwhile, the whole roll of battery cell diaphragm containing the abnormal part is prevented from being directly discarded, the utilization rate of the abnormal battery cell diaphragm is improved, and the production cost is reduced. The waste problem is avoided.

Description

Technical Field

[0001] The present application belongs to the field of battery manufacturing technology, and specifically relates to a battery cell diaphragm detection device and a battery cell preparation device. Background Art

[0002] A battery usually includes a positive electrode sheet, a negative electrode sheet, and a cell separator arranged between the positive electrode sheet and the negative electrode sheet. The function of the cell separator in the battery cell is to prevent the positive and negative electrode sheets in the battery cell from directly touching and short-circuiting. If there is an abnormality on the cell separator, it will cause the positive and negative electrodes to short-circuit, battery failure and other problems. Therefore, the quality of the cell separator will seriously affect the safety of the battery.

[0003] The current battery cell stacking method requires human eyes to judge whether there are abnormal points on the battery cell diaphragm or whether the diaphragm on the roll is about to run out. However, this method is not only inefficient, but also has the problem of missed judgment. If the judgment is not accurate whether the remaining battery cell diaphragm can still stack a roll core and the new roll is not replaced in time, resulting in insufficient diaphragm length, the stacked roll core can only be scrapped, or there are abnormalities on the battery cell diaphragm, which will cause the positive and negative electrodes of the battery cell diaphragm to short-circuit during the winding or stacking process, directly causing the prepared battery cell to be unqualified and can only be scrapped, while wasting normal positive and negative electrodes, consuming the life of the stacking table device, wasting production capacity, and reducing production yield and production efficiency. In addition, the industry usually chooses to directly discard the entire roll of battery cell diaphragm for abnormal battery cell diaphragms, wasting battery cell diaphragm resources. Utility Model Content

[0004] The utility model aims to provide a battery cell diaphragm detection device and a battery cell preparation device, which can solve the problem of waste of battery cell diaphragm resources in the existing battery cell preparation system.

[0005] In order to solve the above technical problems, the utility model is achieved as follows:

[0006] The utility model provides a battery cell diaphragm detection device, comprising:

[0007] A quality detection component, the quality detection component is used to detect and identify at least one abnormal surface portion of the battery cell separator;

[0008] A length measuring component, which is used to measure the transmission length of the cell diaphragm starting from the abnormal surface part;

[0009] The cutting assembly is used to cut the cell diaphragm with a measured transmission length into a cell diaphragm not less than a preset length and without the abnormal surface parts. The cutting assembly is also used to remove the cell diaphragm with the abnormal surface parts.

[0010] Compared with the prior art, the technical solution of the utility model has the following advantages:

[0011] The utility model provides a battery cell diaphragm detection device, comprising a quality detection component, a length measurement component and a cutting component. The battery cell diaphragm passes through the quality detection component, the length measurement component and the cutting component in sequence, wherein the quality detection component detects the battery cell diaphragm passing through to identify whether there are any abnormal surface parts of the battery cell diaphragm, and the length measurement component is used to measure the transmission length of the battery cell diaphragm starting from the abnormal surface part. When the quality inspection component detects an abnormal surface part, the transmission length of the battery cell separator is measured from the abnormal surface part. If no other abnormal surface parts are detected on the battery cell separator that passes through the quality inspection component subsequently, and the transmission length of the battery cell separator is greater than the preset length, the cutting component will cut the battery cell separator according to the preset required length, so as to obtain a normal battery cell separator of the preset length, and then the whole roll of battery cell separators including the abnormal parts can be classified and cut, and the normal battery cell separators that can be used for lamination and meet the required lamination length can be cut. Through the above processing, the whole roll of battery cell separators including the abnormal parts is avoided from being directly discarded, and the usable battery cell separators are cut out for use, which improves the utilization rate of the battery cell separators, solves the problem of waste of battery cell separator resources in the existing battery preparation system, and avoids the waste of positive and negative electrodes. At the same time, when the quality inspection component detects that there are abnormal surface parts on the battery cell separator, the cutting component cuts off the surface abnormal parts at the corresponding position of the battery cell separator to ensure the quality of the battery cell separator and avoid the use of separators containing abnormal parts for lamination.

[0012] Another object of the utility model is to provide a battery cell preparation device, comprising any of the above-mentioned battery cell diaphragm detection devices and stacking equipment, the stacking equipment uses the normal battery cell diaphragms of a preset length cut by the battery cell diaphragm detection device for stacking, so as to solve the problem of waste of battery cell diaphragm resources in the existing battery cell preparation system.

[0013] The advantages of the battery cell preparation equipment and the above-mentioned battery cell diaphragm detection device over the prior art are the same and will not be described in detail here.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 It is a structural schematic diagram of a battery cell diaphragm detection device provided by an embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the working principle of the needle winding in the embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the positions of abnormal parts and normal parts on the surface of the embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the battery cell preparation equipment in the embodiment of the utility model.

[0020] Reference numerals:

[0021] 1-quality inspection component, 2-length measuring component, 3-cutting component, 31-cutter, 32-winding needle, 4-battery cell diaphragm, 41-abnormal surface part, 42-normal surface part, 51-first fixed roller, 52-second fixed roller, 53-pressing roller, 6-rotating roller, 7-movable roller, 8-waste collecting device, 9-stacking device, 91-stacking table, 92-pressing claw, 93-pole piece positioning table, 94-pole piece spring brake, 95-swinging roller, 10-reel, 101-inflating shaft. DETAILED DESCRIPTION

[0022] The term "plurality" in the specification and claims of the present utility model means two or more than two. The terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present utility model.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The embodiments of the utility model will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and should not be construed as limitations on the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0025] The embodiments of the utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] The utility model provides a battery cell diaphragm detection device, referring to Figure 1 , comprising a quality detection component 1, the quality detection component 1 is used to detect and identify at least one abnormal surface portion 41 of the battery cell separator 4; a length measurement component 2, the length measurement component 2 is used to measure the transmission length of the battery cell separator 4 starting from the abnormal surface portion 41; a cutting component 3, the battery cell separator 4 passes through the quality detection component 1, the length measurement component 2 and the cutting component 3 in sequence, the cutting component 3 is used to cut the battery cell separator 4 with the measured transmission length to obtain a battery cell separator 4 that is not less than a preset length and does not have the abnormal surface portion 41, and the cutting component 3 is also used to cut off the battery cell separator 4 with the abnormal surface portion 41.

[0027] Specifically, combined Figure 1As shown in the figure, the embodiment of the utility model provides a battery cell diaphragm detection device, including a quality detection component 1, a length measurement component 2 and a cutting component 3, wherein the quality detection component 1 is used to detect and identify whether there is a surface abnormality 41 on the battery cell diaphragm 4. If there is at least one surface abnormality 41 on a roll of battery cell diaphragm 4, the quality detection component 1 can identify and distinguish different surface abnormalities 41 to ensure that the surface abnormality 41 is not missed. The length measurement component 2 uses a meter to measure the transmission length of the battery cell diaphragm 4 from the surface abnormality 41. At the same time, when there is no surface abnormality, the length measurement component 2 is used to measure the length of the normal part. Among them, the transmission length refers to the length of the battery cell diaphragm 4 transmitted by the length measurement component 2 from the position of the length measurement component 2. The quality detection component 1 and the length measurement component 2 transmit the measured data to the control platform, and the control platform controls the action of the cutting component 3 to cut the battery cell diaphragm 4 according to the preset length. At the same time, the control platform is also electrically connected to the display screen, and can display the diaphragm detection data, number of stacking layers, stacking speed or diaphragm tension in real time on the display screen. It can also record the type, quantity, and location of abnormalities detected on the surface of the battery cell diaphragm 4, as well as the diaphragm area lost due to various abnormalities, so as to facilitate subsequent search and analysis.

[0028] Specifically, the pressure rollers 53 are arranged in pairs, and the two pressure rollers 53 are arranged at intervals up and down to clamp the battery cell diaphragm 4. When the pressure rollers 53 rotate, the battery cell diaphragm 4 is driven by the pressure rollers 53 to pass through the quality inspection component 1, the length measurement component 2 and the cutting component 3 in sequence. When the transmission length is not less than the preset length and the battery cell diaphragm 4 of the preset length does not have an abnormal surface part 41, the cutting component 3 cuts the battery cell diaphragm 4 according to the preset length to obtain a usable battery cell diaphragm 4. The battery cell diaphragm 4 is wound around the outer periphery of the reel 10, and the reel 10 is sleeved on the air expansion shaft 101 and rotates with the rotation of the air expansion shaft 101. The air expansion shaft 101 forms a bulge on the surface after high-pressure inflation, which improves the connection force between the reel 10, and the air expansion shaft 101 cooperates with the pressure roller 53 to unwind, driving the battery cell diaphragm 4 to pass through the quality inspection component 1, the length measurement component 2 and the cutting component 3 in sequence. In the first case, there is at least one abnormal surface part 41 on the battery cell separator 4. When the battery cell separator 4 passes through the quality inspection component 1, the quality inspection component 1 detects the first abnormal surface part 41. At this time, the length measurement component 2 will measure the transmission length of the battery cell separator 4 from the first abnormal surface part 41, and define the preset length as L. It can be understood that the preset length L is the same as the separator length required for stacking, that is, the separator length required for a core. If it is detected that there is no abnormal surface part 41 on the battery cell separator 4 and its length exceeds the preset length L, the cutting component 3 will cut off the separator 4 at the tail of the stacked core to facilitate stacking the next core. If it is detected that there is an abnormal surface part 41 on the battery cell separator 4, the cutting component 3 will cut off the abnormal surface part 41. If the length from the position of the first surface abnormality 41 to the position where cutting is required is L, and no surface abnormality 41 is detected on the battery cell separator 4 between the two, then the section of battery cell separator 4 with a length of L is a normal separator that can be used for lamination, and the cutting component 3 cuts the battery cell separator 4 according to the preset length to obtain a battery cell separator 4 with a length of L. In the second case, when the cell separator 4 passes through the quality inspection component 1, the quality inspection component 1 detects the first surface abnormality part 41 and the second surface abnormality part 41, that is, the distance between the first surface abnormality part 41 and the second surface abnormality part 41 is less than L. At this time, there is a surface abnormality part 41 in the cell separator 4 of the preset length. This section of the separator is an abnormal separator and cannot be used for lamination. Then the length measurement component 2 starts to measure the next section of the cell separator 4 of the preset length L from the second surface abnormality part 41, and the above method is used to check again. If there is no surface abnormality part 41 in the next section of the cell separator 4 of the preset length L, the cutting component 3 cuts the cell separator 4 according to the preset length to obtain a cell separator 4 of length L. If there is a surface abnormality part 41 in the next section of the cell separator 4 of the preset length L, the cutting component 3 does not cut and continues to re-measure, and so on, until a section of the cell separator 4 of the preset length L is found without the surface abnormality part 41.At the same time, when the quality inspection component 1 detects that there is an abnormal surface portion 41 on the battery cell separator 4, regardless of whether the abnormal surface portion 41 is a point or a section of abnormal battery cell separator 4, the cutting component 3 cuts off the portion with the surface abnormality 41 at the corresponding position of the battery cell separator 4 to ensure the quality of the battery cell separator.

[0029] The current diaphragm detection device performs pressure resistance test on the diaphragm after the roll core is stacked. The main reasons for poor pressure resistance include holes, pinholes, wrinkles, etc. If abnormal parts are found in the battery cell diaphragm, the entire roll of diaphragm will be discarded or the stacked battery cell will be discarded after stacking, resulting in waste of positive and negative electrodes, waste of diaphragm and waste of equipment life. By using the cell diaphragm detection device provided by the embodiment of the utility model, the abnormal part 41 on the surface of the cell diaphragm 4 is detected by the quality detection component 1, and the cutting component 3 cuts the cell diaphragm 4 according to the preset required length, thereby obtaining a normal cell diaphragm 4 of the preset length, and then the whole roll of cell diaphragm 4 including the abnormal part 41 can be cut in a targeted manner, and the normal cell diaphragm 4 that can be used for lamination and meets the required lamination length can be cut, avoiding the direct discarding of the whole roll of cell diaphragm including the abnormal part and the use of the cell diaphragm 4 containing the surface abnormal part for lamination, and cutting out the usable cell diaphragm for use, thereby improving the utilization rate of the cell diaphragm, solving the problem of wasting cell diaphragm resources in the existing cell preparation system, and improving production efficiency. And through the detection of the quality detection component 1, the cutting component 3 promptly cuts off the cell diaphragm 4 with the surface abnormal part 41, thereby improving the use quality of the cell diaphragm 4.

[0030] Optionally, refer to Figure 1 The quality inspection component 1 is a CCD camera, and the CCD camera takes an image of the battery cell separator 4 to identify abnormal surface areas.

[0031] Specifically, combined Figure 1 As shown in the figure, the quality inspection component 1 is a CCD camera, which is a semiconductor optoelectronic element made by large-scale integrated circuit technology and is equipped with a light source to provide light for the detection environment to ensure the clarity of the detection image. The CCD camera is used to detect the surface condition of the diaphragm, such as whether there are foreign matter, dirt, bubbles, pinholes, holes, tears, wrinkles, wavy edges, ceramic coating leakage, abnormal thickness or width, etc. on the surface of the diaphragm. The CCD camera measures synchronously with the length measurement component 2, transmits the measurement data to the control platform, and then drives the rotation of the inflation shaft 101 and the pressure roller 53, drives the movement of the battery cell diaphragm 4, and drives the cutting action of the cutting component 3.

[0032] Optionally, refer to Figure 1 The battery cell diaphragm detection device further includes a first fixed roller 51 and a second fixed roller 52 arranged vertically up and down;

[0033] The battery cell separator 4 passes through the first fixed roller 51 and the second fixed roller 52 in the vertical direction in sequence. The two CCD cameras are respectively arranged on both sides of the battery cell separator 4. The optical axis of the CCD camera is located in the horizontal plane, and the optical axis of the CCD camera is perpendicular to the plane of the battery cell separator 4.

[0034] Specifically, combined Figure 1 As shown in the figure, the cell diaphragm 4 is driven by the pressing roller 53, and passes through the first fixed roller 51 and the second fixed roller 52 arranged vertically in sequence. Two CCD cameras are respectively arranged on both sides of the cell diaphragm 4, and are not in direct contact with the cell diaphragm 4. The optical axis of the CCD camera is parallel to the horizontal plane and perpendicular to the plane of the cell diaphragm 4. In the process of movement, the ceramic powder on the diaphragm surface is prevented from falling onto the CCD camera to affect the detection effect.

[0035] Optionally, refer to Figure 1 , the quality detection component 1 comprises:

[0036] A pressing component, through which the cell diaphragm 4 passes and is bonded to the pressing component;

[0037] A resistance tester, which is used to apply voltage to the pressing component to obtain electrical parameters of the battery cell diaphragm 4;

[0038] The analysis component is used to determine whether there is an abnormal surface portion 41 of the battery cell separator 4 according to electrical parameters.

[0039] Specifically, combined Figure 1 As shown in the figure, the quality inspection component 1 includes a pressing component, a resistance tester and an analysis component. The pressing component is attached to the cell diaphragm 4. During the measurement process, the resistance tester applies voltage to the pressing component, measures the electrical performance parameters of the cell diaphragm 4, and sends the electrical performance parameters to the analysis component, which determines whether there is an abnormal surface part 41 of the cell diaphragm 4. This embodiment is a contact measurement, which determines whether there is an abnormal surface part 41 of the cell diaphragm 4 by measuring the electrical performance parameters of the cell diaphragm 4.

[0040] Optionally, refer to Figure 1 , the cutting assembly 3 comprises:

[0041] A cutter 31, wherein the cutter 31 is used to cut the battery cell separator 4 into a preset length;

[0042] The winding needle 32 is used to wind up the battery cell separator 4 of a preset length without the surface abnormal part 41 and move it to the cutting knife 31. The winding needle 32 is also used to wind up the battery cell separator 4 with the surface abnormal part 41.

[0043] Specifically, combined Figure 1 As shown in the figure, the cutting component 3 includes a cutter 31 and a winding needle 32. When the quality inspection component 1 detects the first abnormal surface part 41, and the distance between the first abnormal surface part 41 and the next abnormal surface part 41 is greater than or equal to the preset length L, a normal surface part 42 is determined near the first abnormal surface part 41 toward the winding drum 10, that is, the cutting point of the cutter 31. The distance between this normal surface part 42 and the abnormal surface part 41 in front can be determined according to the diameter of the winding needle 32, the glue length between two adjacent battery cell separators 4, the size of the hole in the battery cell separator 4, the size of the dirt spot on the battery cell separator 4, the tear length of the battery cell separator 4 or the production requirements. Figure 2 The schematic diagram of the working principle of the winding needle 32 in the embodiment of the utility model is shown, and the distance between the normal surface part 42 and the front abnormal surface part 41 is set to be equal to the diameter d of the winding needle 32, or slightly larger than the diameter d of the winding needle 32. When the winding needle 32 winds the battery cell diaphragm 4 from the abnormal surface part 41 and moves to the normal surface part 42, it is used for cutting by the cutter 31. If the distance between the two is less than the diameter d of the winding needle 32, the normal surface part 42 will be clamped in the winding needle 32, and the cutter 31 cannot cut the normal surface part 42; if the distance between the two is too large, the material of the battery cell diaphragm 4 will be wasted. The cutter 31 includes but is not limited to hardware knives, heating wires or laser cutting tools.

[0044] Specifically, combined Figure 2 As shown in the figure, when the abnormal surface portion 41 is in the form of a dot, the winding needle 32 clamps the abnormal surface portion 41, and the cutter 31 cuts off the cell separator 4 at the normal surface portion 42; Figure 3 The schematic diagram of the position of the abnormal surface part 41 and the normal part 42 in the embodiment of the utility model is shown. When the abnormal surface part 41 is large in area, or includes multiple abnormal points close to each other, and the distance between each two adjacent abnormal points is greater than the diameter d of the winding needle 32 and less than the preset length L, the winding needle 32 needs to continue winding and collecting until the normal surface part 42 appears, and the cutter 31 is used to cut the battery cell separator 4. When the battery cell separator 4 is continuously detected as a normal separator, that is, there is no abnormal surface part 41 between any two cutting points of the cutter 31, the cutting point of the cutter 31 on the rear side of the previous battery cell separator 4 is the cutting point of the cutter 31 on the front side of the next battery cell separator 4, and the stacking starts from here, and so on.

[0045] Optionally, refer to Figure 1 The battery cell diaphragm detection device also includes a plurality of rotating rollers 6 and a plurality of movable rollers 7. The plurality of rotating rollers 6 are on the same horizontal line, and a movable roller 7 is arranged between two adjacent rotating rollers 6. Each movable roller 7 can independently move up and down in the vertical direction.

[0046] Specifically, combined Figure 1, the battery cell diaphragm detection device further includes a plurality of rotating rollers 6 and a plurality of movable rollers 7. The rotating shaft of the rotating roller 6 is fixed, that is, the position of the rotating roller 6 does not change during the rotation process. The rotating shaft of the movable roller 7 can move up and down in the direction indicated by the arrow in the figure, so that the movable roller 7 moves up and down during the rotation process. The rotation of the pressing roller 53 provides the power for the movement of the battery cell diaphragm 4. The battery cell diaphragm 4 passes through the first fixed roller 51, the quality detection component 1, the length detection component 2, the second fixed roller 52, the plurality of rotating rollers 6 and the plurality of movable rollers 7, and reaches the cutting component 3. This distance is the length of the battery cell diaphragm 4 that has been detected. This length can be determined according to the number of rotating rollers 6, the number of movable rollers 7 and the position of the movable rollers 7. Specifically, the more the number of rotating rollers 6 and movable rollers 7, the longer the length of the battery cell diaphragm 4 that has been detected; the farther the position of the movable roller 7 is from the rotating roller 6, the longer the length of the battery cell diaphragm 4 that has been detected, and vice versa. At present, the length of the battery cell separator 4 required for a single winding core generally exceeds ten meters. The embodiment of the utility model increases the length of the battery cell separator 4 that can be towed by providing multiple rotating rollers 6 and multiple movable rollers 7, and adjusting the position of the movable rollers 7, thereby ensuring that the length of the battery cell separator 4 that has been tested is greater than the length of the battery cell separator 4 required for a winding core, and at the same time shortening the length dimension between the reel 10 and the cutting assembly 3.

[0047] Optionally, refer to Figure 1 , the battery cell diaphragm detection device also includes:

[0048] A waste collecting device 8 is used to collect the battery cell separator 4 wound by the winding needle 32 .

[0049] Specifically, combined Figure 1 As shown in the figure, the waste collection device 8 is arranged near the cutting assembly 3, and is used to collect the cell separator 4 containing the surface abnormal part 41 wound by the winding needle 32. As the cell separator 4 moves, the surface abnormal part 41 moves to the winding needle 32, and under the control of the control platform, the winding needle 32 extends to clamp the surface abnormal part 41. When the surface abnormal part 41 is in the form of a dot, the winding needle 32 clamps the surface abnormal part 41, and the cutter 31 cuts the cell separator 4 at the surface normal part 42 near the surface abnormal part 41; when the surface abnormal part 41 is large in area, the winding needle 32 continues to wind and collect until the surface normal part 42 appears, and the cell separator 4 is cut with the cutter 31. After the winding of the surface abnormal part 41 by the winding needle 32 and the cutting by the cutter 31 are completed, the winding needle 32 retracts, and the cut surface abnormal part 41 is thrown into the waste collection device 8 through the instrument clamp. A waste collection device 8 is provided to collect the abnormal surface parts 41 cut off from the winding, so as to ensure that the waste is handled in time and does not interfere with the battery cell stacking work.

[0050] Optionally, refer to Figure 1The battery cell separator detection device also includes an alarm device, which is electrically connected to the quality detection component 1 and is used to alarm when the quality detection component 1 detects the abnormal surface area 41 or fails to detect the battery cell separator 4.

[0051] Specifically, combined Figure 1 As shown in the figure, the alarm device is electrically connected to the quality inspection component 1. When the quality inspection component 1 detects an abnormal surface portion 41, the alarm device issues an alarm reminder, which is controlled by the control platform until the cutting component 3 cuts off the abnormal portion and the alarm reminder is cancelled; when the battery cell diaphragm 4 on the reel 10 is used up, the quality inspection component 1 cannot detect the movement of the battery cell diaphragm 4, and the length of the battery cell diaphragm 4 from the cutting component 3 to the reel 10 is not enough to fold a reel core, and the alarm device issues an alarm reminder, and the reel 10 needs to be removed from the inflatable shaft and replaced with a reel 10 with a sufficient length of battery cell diaphragm 4, and the head of the newly replaced battery cell diaphragm 4 is connected to the tail of the remaining battery cell diaphragm 4 on the battery cell diaphragm detection device, preferably with tape to ensure the integrity of the battery cell diaphragm 4.

[0052] Optionally, the battery cell diaphragm detection device further includes a deviation corrector, and the deviation corrector is used to correct the deviation of the battery cell diaphragm 4 .

[0053] Specifically, due to speed, tension or uneven thickness or mechanical damage of the battery cell separator 4, the battery cell separator 4 shakes and deviates from the preset direction during movement. A deviation corrector is provided to adjust the moving direction and state of the battery cell separator 4 to ensure smooth cell stacking.

[0054] In addition, refer to Figure 4 The embodiment of the utility model also provides a battery cell preparation device, including a stacking device 9 and a battery cell diaphragm detection device as described in any of the above embodiments, wherein the stacking device 9 is arranged on the output side of the battery cell diaphragm detection device, and the stacking device 9 is used to stack the battery cell diaphragm 4 of the preset length.

[0055] Specifically, combined Figure 4 As shown in the figure, the battery cell preparation equipment provided by the embodiment of the utility model includes a stacking device 9 and a battery cell diaphragm detection device as described in any of the above embodiments. The stacking device 9 includes a stacking table 91, a pressure claw 92, a pole piece positioning table 93, a pole piece spring 94 and a swing roller 95. The pressure claw 92 is located above the side of the stacking table 91, and two are symmetrically arranged along the length direction of the stacking table 91, which are used to press the battery cell diaphragm 4 and the electrode sheet when the battery cell is stacked. The pole piece spring 94 stores the sliced ​​electrode sheet. In some embodiments, the following steps are used to stack the battery cell diaphragm 4:

[0056] Step 1: The pressing claw 92 on the right side of the stacking table 91 presses one side of the battery cell diaphragm 4 onto the stacking table 91 , and the swing roller 95 pulls the other side of the battery cell diaphragm 4 to the left side of the stacking table 91 , so that the battery cell diaphragm 4 to be stacked is parallel to the stacking table 91 .

[0057] Step 2: Use the suction cup to suck the electrode in the electrode spring 94 onto the electrode positioning platform 93 for positioning. Then, the suction cup sucks the electrode from the electrode positioning platform 93 onto the battery cell diaphragm 4 of the stacking platform 91, and the pressing claw 92 presses and fixes the electrode. The positive electrode sheet can be stacked on the left side of the stacking platform 91, and the negative electrode sheet can be stacked on the right side of the stacking platform 91. However, this embodiment does not limit the stacking position of the positive electrode sheet and the negative electrode sheet. Usually, the negative electrode sheet is stacked first, then the positive electrode sheet, and then the positive electrode sheet and the negative electrode sheet are stacked to ensure that the outer layer of the winding core is the negative electrode sheet.

[0058] Step three, in this way, the swing roller 95 moves back and forth to perform Z-shaped lamination. After stacking one core, the stacked core is clamped and removed by the robot, and glue is applied to ensure the stability of the connection between the battery cell diaphragm 4 and the electrode. At the same time, the pressure claw 92 on the right side of the lamination table 91 presses the battery cell diaphragm 4. If no battery cell diaphragm 4 with surface abnormalities is detected, the cutter 31 cuts off the battery cell diaphragm 4 at the tail of the stacked core to facilitate stacking the next core; if a battery cell diaphragm 4 with surface abnormalities is detected, the winding needle 32 clamps the battery cell diaphragm 4 with surface abnormalities, collects the winding, and the cutter 31 cuts off the battery cell diaphragm 4 with surface abnormalities to complete one core.

[0059] In the battery cell preparation equipment equipped with the battery cell separator detection device, the problem of wasting battery cell separator 4 resources in the existing battery cell preparation system can also be solved: prevent defective battery cell separator 4 from being stacked into the core, affecting the product yield and wasting materials; at the same time, avoid the waste problem caused by scrapping excess battery cell separator 4 and using battery cell separator 4 that is not enough for one core for stacking due to human misjudgment.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery cell diaphragm detection device, characterized in that: include: A quality detection component (1), the quality detection component (1) being used to detect and identify at least one abnormal surface portion (41) of the battery cell separator (4); A length measuring component (2), the length measuring component (2) being used to measure the transmission length of the battery cell separator (4) starting from the surface abnormality portion (41); A cutting component (3), wherein the battery cell separator (4) passes through the quality detection component (1), the length measurement component (2) and the cutting component (3) in sequence, wherein the cutting component (3) is used to cut the battery cell separator (4) of the measured transmission length to obtain a battery cell separator (4) of not less than a preset length and without the abnormal surface portion (41), and the cutting component (3) is also used to remove the battery cell separator (4) with the abnormal surface portion (41).

2. The battery cell diaphragm detection device according to claim 1, characterized in that: The quality detection component (1) is a CCD camera, and the CCD camera identifies the abnormal surface portion (41) by taking an image of the battery cell separator (4).

3. The battery cell diaphragm detection device according to claim 2, characterized in that: The battery cell diaphragm detection device further comprises a first fixed roller (51) and a second fixed roller (52) arranged vertically up and down; The battery cell diaphragm (4) passes through the first fixed roller (51) and the second fixed roller (52) in sequence along the vertical direction, and the two CCD cameras are respectively arranged on both sides of the battery cell diaphragm (4), and the optical axis of the CCD camera is located in a horizontal plane, and the optical axis of the CCD camera is perpendicular to the plane of the battery cell diaphragm (4).

4. The battery cell diaphragm detection device according to claim 1, characterized in that: The quality detection component (1) comprises: A pressing assembly, wherein the battery cell diaphragm (4) passes through the pressing assembly and is bonded to the pressing assembly; A resistance tester, the resistance tester being used to apply a voltage to the pressing component to obtain electrical parameters of the battery cell diaphragm (4); An analysis component is used to determine whether the abnormal surface portion (41) exists on the battery cell separator (4) based on the electrical parameter.

5. The battery cell diaphragm detection device according to claim 1, characterized in that: The cutting assembly (3) comprises: A cutter (31), the cutter (31) being used for cutting the battery cell separator (4) to the preset length; A winding needle (32), the winding needle (32) is used to wind up the battery cell separator (4) of a preset length without the surface abnormal part (41) and move it to the cutting knife (31), and the winding needle (32) is also used to wind up the battery cell separator (4) with the surface abnormal part (41).

6. The battery cell diaphragm detection device according to claim 1, characterized in that: The battery cell diaphragm detection device further comprises a plurality of rotating rollers (6) and a plurality of movable rollers (7), wherein the plurality of rotating rollers (6) are located on the same horizontal line, and a movable roller (7) is arranged between two adjacent rotating rollers (6), and each movable roller (7) can independently move up and down in a vertical direction.

7. The battery cell diaphragm detection device according to claim 5, characterized in that: The battery cell diaphragm detection device also includes: A waste collection device (8), wherein the waste collection device (8) is used to collect the battery cell separator (4) wound by the winding needle (32).

8. The battery cell diaphragm detection device according to claim 1, characterized in that: The battery cell diaphragm detection device further comprises an alarm device, which is electrically connected to the quality detection component (1), and is used to alarm when the quality detection component (1) detects the abnormal surface area (41) or fails to detect the battery cell diaphragm (4).

9. The battery cell diaphragm detection device according to claim 1, characterized in that: The battery cell diaphragm detection device also includes: A deflection corrector, the deflection corrector is used to correct the deflection of the battery cell diaphragm (4).

10. A battery cell preparation device, characterized in that: The battery cell preparation equipment comprises a lamination device (9) and a battery cell diaphragm detection device according to any one of claims 1 to 9, wherein the lamination device (9) is arranged at the output side of the battery cell diaphragm detection device, and the lamination device (9) is used to laminate the battery cell diaphragm (4) of the preset length.

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