Manufacturing apparatus for battery electrodes and manufacturing control method for battery electrodes

Abstract

To provide a manufacturing apparatus for battery electrodes that enables high productivity and low cost in the production of battery electrodes. [Solution] A battery electrode manufacturing apparatus having a roll press device for pressing an electrode sheet for a battery by passing it between a pair of rolls, and having measuring means for measuring the surface of the rolls by arranging measuring means in an array, or by oscillating in the longitudinal direction of the roll, or a combination of both, corresponding to each of the pair of rolls.

Description

Technical Field

[0001] The present invention relates to a manufacturing apparatus for electrodes for batteries and a manufacturing management method for electrodes for batteries.

Background Art

[0002] With the spread of electric vehicles, the demand for batteries, which are essential as power sources for electric vehicles, has been rapidly increasing. Along with this, there is a strong demand for improving the productivity of electrodes used in batteries.

[0003] Patent Document 1 discloses a method for inspecting electrodes. Patent Document 2 also discloses switching the conveyance system when an abnormality is detected on the roll surface.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Patent Document 1 is a technology related to the inspection of electrodes after manufacturing, and does not disclose improvements in the electrode production method itself. Further, Patent Document 2 requires a roll width that is twice the width of the electrode, resulting in high roll costs and equipment costs.

[0006] Therefore, the present invention provides a manufacturing apparatus for electrodes for batteries and a manufacturing management method for electrodes for batteries that achieve high productivity and low-cost manufacturing of electrodes for batteries.

Means for Solving the Problems

[0007] If an example of the means of the present invention is disclosed, it will be as follows.

[0008] A battery electrode manufacturing apparatus having a roll press device for pressing an electrode sheet for a battery by passing it between a pair of rolls, and having measuring means for measuring the surface of the rolls by arranging measuring means in an array, or by oscillating in the longitudinal direction of the roll, or a combination of both, corresponding to each of the pair of rolls. [Effects of the Invention]

[0009] According to the above means, it is possible to provide a manufacturing apparatus for battery electrodes and a manufacturing control method for battery electrodes that realize the production of battery electrodes with high productivity and low cost.

[0010] Further means and effects of the present invention will become apparent throughout the entire specification below. [Brief explanation of the drawing]

[0011] [Figure 1] This is an example of a manufacturing apparatus for battery electrodes related to the rolling process. [Figure 2] This is an explanatory diagram for roll measurement. [Figure 3] This is an explanatory diagram for roll measurement. [Figure 4] This is an explanatory diagram for roll measurement. [Figure 5] This is an explanatory diagram illustrating an example of measurement results. [Figure 6] This is an explanatory diagram illustrating an example of measurement results. [Figure 7] This is an explanatory diagram of an example of a manufacturing control device. [Figure 8] This is an explanatory diagram for roll measurement. [Figure 9] This is an explanatory diagram regarding the abnormal part of the electrode sheet. [Figure 10] This is an explanatory diagram regarding the abnormal part of the electrode sheet. [Figure 11] This is an explanatory diagram regarding the abnormal part of the electrode sheet. [Figure 12] This is an explanatory diagram regarding the abnormal part of the electrode sheet. [Figure 13] This is an example of a display screen. [Figure 14] This is an example of a display screen. [Figure 15] This is an example of a display screen. [Figure 16] This is an example of a display screen. [Figure 17] This is an example of a display screen. [Figure 18] This is an example of a display screen.

Embodiments for Carrying out the Invention

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings as necessary.

Embodiment

[0013] FIG. 1 is an example of a manufacturing apparatus for an electrode for a battery related to a roll process.

[0014] The electrode sheet 1 is pressure-pressed by the rolls 2A and 2B. The rolls 2A and 2B rotate in opposite directions to each other in the direction of the arrows in the figure. As a result, the electrode sheet 1 moves in the electrode sheet advancing direction 12.

[0015] Note that due to the pressure pressing, the thickness of the electrode sheet 1 becomes thinner after pressing than before pressing. In FIG. 1, for the sake of simplicity of description, the change in the thickness of the electrode sheet 1 is omitted from the description.

[0016] The purpose of the pressure pressing is to achieve a desired electrode thickness. For example, if the density of the active material in the electrode sheet is increased by pressure pressing, winding or stacking of a large number of electrode sheets in the same-sized space becomes possible, increasing the capacity of the battery.

[0017] Note that the electrode sheet 1 may be one obtained by coating an electrode mixture composed of an active material, a conductive material, a binder, etc. on both sides of a current collector (copper foil, aluminum foil).

[0018] The roll operation management device 8 manages the pressure applied by rolls 2A and 2B, the rotational speed, and, in some cases, the heating temperature. For example, the roll operation management device 8 outputs a roll drive signal 15 directly to rolls 2A and 2B, or to their drive motors. This allows the roll operation management device 8 to determine the rotational speed of the rolls or the advancement speed of the electrode sheet 1. Roll drive information 16 is input from the roll operation management device 8 to the manufacturing management device 7. Conversely, the manufacturing management device 7 may also instruct the roll operation management device 8 to provide the roll drive information 16.

[0019] Array sensors 5A and 5B are positioned on roll 2A and roll 2B, respectively. Here, "array-like" refers to a configuration where the measuring means are integrated and arranged in one or two dimensions. However, this does not exclude cases where the sensors are not array-like, i.e., not necessarily integrated. Furthermore, it does not exclude cases where sensors are provided on only one of the rolls. Array sensors 5A and 5B perform measurements 11A and 11B, respectively. The measurement results are input to the manufacturing control device 7 as measurement results 21A and 21B.

[0020] Figure 2 is an explanatory diagram of roll measurement. As an example, the case of roll 2A and array sensor 5A will be explained.

[0021] Sensing 100 is performed on the roll 2A from the array sensor 5A. In this process, by using the array sensor, measurements are taken across the entire width of the roll.

[0022] Figure 3 shows that the array sensor 5A in Figure 2 is oscillating in the scanning direction 101. This reduces the number of sensors in the array sensor 5A, thereby lowering the cost of the manufacturing equipment for battery electrodes.

[0023] It is not essential that the roll measurement be performed in complete real-time across the entire surface. For example, it is sufficient if the entire surface can be scanned during a few rotations of the roll. Therefore, as shown in Figure 3, by having the array sensor 5A measure while oscillating in the scanning direction 101, both cost reduction of the manufacturing equipment and inspection performance can be achieved.

[0024] Figure 4 is an explanatory diagram of roll measurement. Figures 2 and 3 correspond to a plan view of the roll seen from above. In contrast, Figure 4 corresponds to a front view of the roll seen from the side.

[0025] As an example, the array sensor 5A has a number of laser diodes 200 and a number of light receiving sensors 201 arranged sequentially. Laser light 210 from the laser diodes 200 is reflected from the surface of the roll 2A. The reflected light 211 is detected by the light receiving sensors 201.

[0026] If there are contaminants such as dirt on the surface of roll 2A, the laser light 210 will be reflected by the contaminants. As a result, the reflected light 211 will be detected by the light receiving sensor at an earlier time compared to other flat surfaces.

[0027] If there are scratches, holes, or peeling of the plating layer on the surface of roll 2A, a depression will form on the roll surface. In this case, the reflected light 211 will be detected by the light receiving sensor at a later timing compared to other flat surfaces.

[0028] Please note that the above explanation of reflected light behavior is merely an example. The important point is that the timing of reflected light detection is reversed between cases of dirt and cases of scratches or detachment.

[0029] This invention utilizes this relationship to enable the differentiation and determination of whether a problem is due to dirt, scratches, or detachment.

[0030] Furthermore, the timing of detection of reflected light 211 due to attached material increases as the size of the attached material increases. Conversely, the timing of detection of reflected light 211 decreases as the size of scratches or detached parts increases. In this way, the change in the intensity of reflected light 211 makes it possible to determine the size and extent of dirt, as well as scratches and detached parts.

[0031] Figure 5 is an explanatory diagram illustrating an example of measurement results. It shows the variation of data 110 relative to the reference value ST. This diagram is applicable to both the detection result itself and the result after data processing.

[0032] X1 represents the position of the roll as it rotates. By reflecting the measurement results from one rotation of the roll, or multiple rotations when the sensor is oscillating, after position correction, the data for the roll's direction of travel is completed. Then, by combining numerous data points similar to those in Figure 5 in parallel along the roll's width direction, the measurement results for the entire roll are completed.

[0033] The reference value ST may be pre-set and entered. Alternatively, it may be automatically generated based on initial data from a normal state after roll replacement, for example. Alternatively, it may be an average value obtained from a state considered normal within a predetermined time during roll operation.

[0034] Figure 5 shows that there is a data area 111 that exceeds the upper threshold S1. This indicates that there is dirt on the roll that exceeds the threshold. Figure 5 also shows that there is a data area 112 that falls below the lower threshold S2. This indicates that there is damage or detachment on the roll that exceeds the threshold.

[0035] As explained in Figure 4, the timing of receiving reflected laser light is earlier in areas where dirt or deposits are present. Therefore, the measured values ​​will detect data received at an earlier timing than on other normal surfaces. Similarly, as explained, the timing of receiving reflected laser light is later in areas where scratches or detachment are present. Therefore, the measured values ​​will detect data received at a later timing than on other normal surfaces.

[0036] However, if the timing of light reception is displayed as is, it becomes difficult to intuitively understand the increase in roll height due to the buildup of deposits on the roll, and the decrease in roll height due to scratches or detachment on the roll. Therefore, in Figure 5, the height that can be considered a normal surface on the roll is used as a reference, and the difference in height is displayed. This makes the display more in line with human perception, preventing misreading or misjudgment by on-site workers and equipment monitors.

[0037] Even if dirt is present on the roll, if it is below a threshold, it will not affect the performance of the electrode sheet 1 after pressing, and production will continue as is. However, if dirt exceeding the threshold is detected, it may affect the performance of the electrode sheet 1 after pressing, so the production equipment will be temporarily stopped, the roll will be cleaned, and the dirt will be removed.

[0038] Similarly, even if scratches or defects occur on the roll, if they do not fall below a threshold, they will not affect the performance of the electrode sheet 1 after pressing, and production will continue as is. However, if scratches or defects below a threshold are detected, there is a possibility that the performance of the electrode sheet 1 after pressing will be affected, so the production equipment will be temporarily stopped, the roll will be replaced, and a new roll will be used.

[0039] Thus, the present invention avoids unnecessary shutdowns of production equipment, and only requires stopping and addressing issues when a real impact is possible, thereby reducing downtime. As a result, productivity is improved.

[0040] It is desirable to set S1 and S2 to be at different distances from ST. This is because the degree to which dirt on the roll and the detachment of metal parts such as plating on the roll affect the electrical properties of the electrode sheet after pressing are different. For example, it is desirable that the difference between ST and S2 be smaller than the difference between ST and S1.

[0041] Furthermore, while the horizontal axis in Figure 5 was explained as representing a roll-shaped location, by using the horizontal axis as a time axis and organizing the data for the same location on the roll, it becomes possible to understand the progression of dirt accumulation, damage, and detachment on the roll, as well as changes over time. In this case, it also becomes possible to estimate the timing of cleaning and roller replacement in advance.

[0042] Figure 6, like Figure 5, is an explanatory diagram illustrating an example of measurement results. The basic explanation is the same as in Figure 5. In Figure 6, the horizontal axis differs from Figure 5 in that it represents X2, which is the position on electrode sheet 1 after pressing.

[0043] Figure 6 shows the possibility of defects occurring in electrode sheet 1 after pressing, based on the results in Figure 5. By displaying numerous data points similar to those in Figure 6 in parallel along the width direction of the roll, the measurement results for the entire electrode sheet are completed.

[0044] Unlike Figure 5, the dirt 111 is likely to remain on the roll and therefore, in most cases, does not need to be considered. On the other hand, the plating wear or detachment 112 may remain on the electrode sheet 1 as foreign matter at the time the detachment occurred. Therefore, by identifying the area in question on the electrode sheet 1, that area is determined to be an abnormal area or a potentially abnormal area.

[0045] Any defective or potentially defective parts are not used in the process of assembling the electrode sheet 1 into the battery, but are discarded beforehand. This allows for the removal of defective parts at an early stage, thereby reducing the defect rate after battery assembly. This leads to a reduction in overall loss costs and contributes to improved productivity.

[0046] Figure 7 shows an example of the configuration of the manufacturing control device 7 shown in Figure 1.

[0047] The manufacturing control device 7 includes a communication device 31, a storage device 32, a memory 33, an input device 34, and a display device 35. The communication device 31 to the display device 35 are connected directly or indirectly to the arithmetic unit 40.

[0048] The arithmetic unit 40 implements various processing functions using software. Data from the communication device 31 is processed by the data acquisition unit 41. The data from the data acquisition unit 41 is evaluated by the comparison unit 42, which evaluates the relationship between the upper threshold S1 and the lower threshold S2 with respect to a reference value ST. The abnormality determination unit 43 checks the relationship with the thresholds and determines that an abnormality has occurred if the threshold is exceeded. The abnormality response database 44 determines the appropriate response based on the nature of the abnormality. Subsequently, the arithmetic unit 40 proposes or instructs the operator or manager to take action via the display device 35. Graphing, as shown in Figures 5 and 6, is also performed by the arithmetic unit 40.

[0049] The battery electrode manufacturing apparatus of this embodiment makes it possible to appropriately measure and judge the condition of the rolls during the manufacturing of battery electrodes, particularly regarding the management of the rolls, such as dirt adhesion, scratches, and plating detachment. Based on the degree of the problem, it is possible to determine the necessary and appropriate action, such as continuing production, cleaning the rolls, or replacing the rolls. As a result, operators and managers can take appropriate action with respect to the manufacturing apparatus.

[0050] Conversely, by avoiding excessive cleaning and roll replacement, downtime can be minimized, resulting in a highly productive manufacturing system for battery electrodes.

[0051] Furthermore, a manufacturing control method for battery electrodes that achieves improved productivity using the aforementioned technical concept is also included within the scope of the technical concept of this embodiment. [Examples]

[0052] Figure 8 is a diagram corresponding to Figure 1. Figure 8 has the following additional features compared to Figure 1.

[0053] The electrode sheet 1 has sensors 6A and 6B for measuring. Sensors 6A and 6B may be the same as the array sensors 5A and 5B. Alternatively, unlike the array sensors 5A and 5B, they may be sensors such as cameras that observe images over a wide area.

[0054] Furthermore, it is preferable that sensors 6A and 6B be optical inspection devices such as high-resolution cameras. This is because high-resolution images allow for a more accurate understanding and detailed examination of the situation.

[0055] By combining inspections from multiple perspectives in this way, it becomes possible to identify minute foreign objects and plating defects that might be overlooked if inspected individually.

[0056] Measurements 10A and 10B are used to measure the electrode sheet 1. The measurement data from sensors 6A and 6B are input to the manufacturing control device 7 as measurement results 20A and 20B.

[0057] Sensors 6A and 6B may be positioned at an angle other than orthogonal to the electrode sheet 1 to enable simultaneous measurement over a wider area.

[0058] In this embodiment, compared to Embodiment 1, a sensor is provided to measure the electrode sheet 1, making it possible to compare the state of the roll with the state of the electrode sheet 1 after it has been pressure-pressed by the roll. This allows for a more accurate and reliable correspondence between the roll inspection results and the state of the electrode sheet 1 after it has been pressure-pressed.

[0059] Therefore, in addition to the effects of Example 1, electrodes that are likely to become defective can be eliminated before battery assembly, thereby minimizing loss costs and enabling the creation of a highly productive battery electrode manufacturing apparatus. [Examples]

[0060] Figure 9 is an explanatory diagram regarding the abnormal part of the electrode sheet, based on Example 1 or Example 2. It is an example of a case where an abnormal part 250 occurs on the electrode sheet 1. One example of the type of abnormality is when the plating peels off from the roll and the peeled-off plating adheres to the abnormal part 250 of the electrode sheet 1.

[0061] Figure 10 shows the case where an abnormal area 251 is set around the abnormal part 250. For example, the abnormal area 251 can be addressed using an analog method, such as when a worker on the manufacturing line marks the electrode sheet 1 by some means in response to instructions from the manufacturing control device 7. Any marking method is acceptable as long as it does not affect other normal electrode parts and allows for reliable confirmation of the presence of the abnormal area in subsequent work processes.

[0062] Alternatively, the data can be stored in the manufacturing control device 7.

[0063] If the abnormal region 251 is used in the battery, there is a high probability that the battery will be defective. Therefore, this region should not be used in the battery and must be discarded before battery assembly. By designating the abnormal region 251 and discarding this region, the generation of defects can be suppressed at an early stage of the process. This makes it possible to realize a manufacturing apparatus for battery electrodes with high productivity.

[0064] Figure 11 shows an example where, instead of the abnormal region 251, a certain width in the direction of travel including the abnormal part 250 is used as the discard region 252. This simplifies the discarding process for the abnormal part.

[0065] Furthermore, the disposal process can be automated by automatically cutting the electrode sheet 1 after pressure pressing to match the size of the battery to be manufactured, and then automatically sorting and disposing of the disposal area 252, including the defective part 250, using an automated transport system. In this case, since the disposal and removal of the defective part can be automated, productivity can be further improved.

[0066] In Figure 11, discard areas 252 are defined based on the direction of travel of the electrode sheet 1. On the other hand, Figure 12 shows an example where the electrode sheet 1 is divided into multiple areas perpendicular to the direction of travel, and usable areas 253 are defined. This makes it possible to utilize a larger area as a normal electrode sheet, further improving productivity.

[0067] As described above, this embodiment allows for the proper removal of abnormal parts of the electrode sheet. Furthermore, it prevents potentially defective parts from being passed to subsequent processes, thus reducing the potential for defects at an early stage. This leads to improved productivity. [Examples]

[0068] Figure 13 shows an example of the screen display on the display device 35 of the manufacturing control device 7 in Examples 1 to 3.

[0069] The display screen 300 shows the display target 301. The first roll is displayed as 301A, the second roll as 301B, one side of the sheet as 301C, and the other side of the sheet as 301D.

[0070] When an operator clicks or selects one of the 301A to 301D, the status of that item is displayed in the display target 310.

[0071] Furthermore, as shown in Figure 14, for example, an operator can display the corresponding screens in Figures 5 and 6 by making a line-shaped instruction 330 with a mouse or the like.

[0072] Figure 15 shows an example of the screen when the first roll 301A is selected.

[0073] The selected 301A will be displayed in a way that indicates it is selected, such as by changing the color or brightness.

[0074] The surface condition of the first roll, designated as the display target 310, is shown. In the diagram, the circular symbol represents dirt, and the square symbol represents scratches or plating peeling. In this way, the condition of the roll surface is displayed using symbols of different shapes, allowing workers or managers to intuitively understand the condition of the roll. Of course, different conditions of the roll surface can be represented not only by changing the shape of the symbols, but also by changing the color, etc.

[0075] The circular or rectangular symbols in the figures, in terms of size and color, are correlated with the values ​​on the vertical axis in Figures 5 and 6.

[0076] Figure 16 shows an example of the display screen when the dirt on the roll exceeds a threshold.

[0077] Dirt 315, which exceeds the threshold, is displayed in a larger size, and its abnormal state is intuitively indicated by features such as red color or flashing lights.

[0078] On the screen, a warning message 320 indicating that the dirt level has exceeded the threshold is displayed. Additionally, an instruction 321 to perform roll cleaning is displayed to the worker or manager. This may also be presented as a recommendation.

[0079] Figure 17 shows an example of a display screen when foreign matter exceeding a threshold, plating detachment, scratches, etc. occur on the roll.

[0080] Foreign objects exceeding a threshold, such as peeling plating or scratches, are displayed as "316," with a larger size indicator and a visual indicator such as red or flashing lights to help users intuitively understand the abnormal condition.

[0081] On the screen, warning messages 322 are displayed for foreign objects exceeding the threshold, plating detachment, scratches, etc. Additionally, instructions 323 to replace the roll are displayed to the worker or manager. This may also be presented as a recommendation.

[0082] Figure 18 shows an example of the display screen when one side 301C of the sheet is selected.

[0083] In Figure 18, for example, triangle 317 indicates a high probability that an abnormality exceeding the threshold has occurred on the electrode sheet. Unlike in Figures 15-17, the display regarding the sheet may only be shown when the threshold is exceeded. This is for the sake of simplifying management.

[0084] On the screen, any abnormalities on the sheet that exceed the threshold are displayed as warning message 325. In this case, as an example, information about the abnormality on the electrode sheet or the part of the sheet corresponding to the triangle mentioned above is displayed.

[0085] At the same time, a discard instruction 326 for the defective part is displayed on the screen. When the discard operation is performed manually on the manufacturing line, the operator performs the discard operation on the area in question upon receiving this display. On the automated line, the defective part is discarded automatically.

[0086] As described in this embodiment, the screen display allows operators or managers to intuitively understand and respond to the status of the battery manufacturing equipment, particularly the rolls.

[0087] Therefore, it becomes possible to ensure accuracy in work and management, leading to improved productivity. [Examples]

[0088] This embodiment describes another example of how to discard the defective part of the electrode sheet.

[0089] Firstly, the manufacturing control device 7 detects an abnormality in the roll condition and provides initial notification to the worker or manager via the display device 35 or the like.

[0090] Secondly, the electrode surface in question is examined in detail. Various methods can be applied to this examination, such as image magnification or measurement using other means or devices. The results are then notified to the worker or supervisor.

[0091] Thirdly, taking into account the first and second points, a determination is made as to whether there is a high probability of foreign matter contamination in electrode sheet 1. If it is determined that there is a high probability, the sheet will be discarded.

[0092] Fourth, in the case of manual handling, the worker marks the abnormal part of electrode sheet 1 that has been judged for disposal, cuts it to the length of a cell, and then discards the corresponding part. In the case of automated handling on an automated line, the abnormal part of electrode sheet 1 that has been judged for disposal is cut based on the corresponding coordinate information, and then automatically discarded as a defective sheet outside the line.

[0093] In this embodiment, the electrode surface in the relevant area is examined before deciding to discard it. This suppresses overkill and reduces the discard rate of electrode sheets 1.

[0094] The technical concepts disclosed in each of the embodiments described above can be used individually or in combination. In either case, they are included within the scope of the disclosures herein.

[0095] Furthermore, methods for manufacturing battery electrodes and methods for managing the manufacturing of battery electrodes, using the technical concepts disclosed in each of the above-described embodiments, are also included within the scope of disclosure of this specification.

[0096] Furthermore, insofar as the ideas and concepts disclosed above are used, their modifications and similar examples are also included within the scope of the present invention.

[0097] Furthermore, an example of the present invention described using the above embodiments can also be expressed as follows.

[0098] <Part 1> It has a roll press device that presses electrode sheets for batteries by passing them between a pair of rolls, A manufacturing apparatus for battery electrodes, having measuring means for measuring the surface of each of the pair of rolls. <Part 2> The measuring means for measuring the surface of the roll is arranged in an array in the battery electrode manufacturing apparatus described in <Part 1>. <Part 3> The measuring means for measuring the surface of the roll is a battery electrode manufacturing apparatus as described in <Part 2>, which swings in the longitudinal direction of the roll. <Part 4> A battery electrode manufacturing apparatus according to any one of items <1> to <3>, wherein the measurement results obtained by the aforementioned measuring means allow for the determination of the conditions on the roll surface based on the change from a reference value. <Part 5> The battery electrode manufacturing apparatus described in <Part 4> determines that an abnormality exists when the measurement result obtained by the aforementioned measurement means exceeds or falls below a threshold. <Part 6> The battery electrode manufacturing apparatus described in <Part 5> allows for the differentiation of abnormal conditions based on the polarity relative to the reference value obtained by the measurement means described above. <Part 7> A manufacturing apparatus for battery electrodes described in <Part 6> that can distinguish and determine dirt attached to the roll from scratches, cracks, plating detachment, etc., based on the polarity relative to the aforementioned reference value. <Part 8> A battery electrode manufacturing apparatus as described in <7>, which instructs or recommends cleaning the roll when the amount of dirt adhering to the roll exceeds a threshold. <Part 9> A battery electrode manufacturing apparatus as described in <8>, which instructs or recommends replacing the roll when scratches, cracks, or deplating of the roll exceed a threshold. <Part 10> The manufacturing apparatus for battery electrodes according to <9>, further comprising, in addition to the aforementioned measuring means, a different measuring means for measuring the surface of the electrode sheet for the battery. <Part 11> The manufacturing apparatus for battery electrodes described in <No. 10> has a display screen that shows the condition of the roll, and displays different shaped icons for dirt, scratches, cracks, deplating, etc. <Part 12> The manufacturing apparatus for battery electrodes described in <No. 11> has a display screen that shows the condition of the roll, and displays the degree of dirt, scratches, cracks, delamination of plating, etc., using icons of different sizes. <Part 13> The battery electrode manufacturing apparatus described in <Part 12> displays the abnormal situation and recommends or instructs the appropriate response on the aforementioned display screen. <Part 14> A battery electrode manufacturing apparatus according to any one of items <1> to <13>, which identifies an abnormal part on the electrode sheet and instructs an operator or manager to cut and remove the area in the electrode sheet containing the abnormal part, or automatically removes the area in the electrode sheet containing the abnormal part. <Part 15> A battery electrode manufacturing apparatus according to <No. 14>, which, after identifying the abnormal part, performs a detailed examination using information from a measurement means different from the measurement means, and then instructs an operator or manager to cut and remove the area in the electrode sheet containing the abnormal part, or automatically removes the area in the electrode sheet containing the abnormal part. <Part 16> It has a roll press device that presses electrode sheets for batteries by passing them between a pair of rolls, A manufacturing control method for battery electrodes, comprising determining the surface of each of the pair of rolls based on the measurement results obtained by a measuring means for measuring the surface of the rolls. <Part 17> The manufacturing control method for battery electrodes described in <No. 16>, wherein the measuring means for measuring the surface of the roll is arranged in an array. <Part 18> The measuring means for measuring the surface of the roll is oscillating in the longitudinal direction of the roll. <Method 17> A method for manufacturing and controlling battery electrodes. <Part 19> A method for manufacturing and controlling battery electrodes according to any one of items <16> to <18>, wherein the measurement results obtained by the aforementioned measuring means allow for the determination of the condition on the roll surface based on the change from a reference value. <Part 20> The manufacturing control method for battery electrodes described in <19>, wherein the measurement result obtained by the aforementioned measurement means is judged to be abnormal when it exceeds or falls below a threshold. <Part 21> The manufacturing control method for battery electrodes described in <20>, wherein the measurement results obtained by the aforementioned measuring means allow for the differentiation of abnormal conditions based on polarity relative to a reference value. <Part 22> A manufacturing control method for battery electrodes described in <No. 21>, which allows for the separate determination of dirt adhering to the roll from scratches, cracks, plating detachment, etc., based on the polarity relative to the aforementioned reference value. <Part 23> A manufacturing control method for battery electrodes as described in <No. 22>, wherein when the amount of dirt adhering to the roll exceeds a threshold, the method instructs or recommends cleaning the roll. <Part 24> The manufacturing control method for battery electrodes described in <No. 23>, wherein when scratches, cracks, or delamination of the plating on the aforementioned roll exceed a threshold, the roll is instructed or recommended to be replaced. <Part 25> A method for manufacturing control of a battery electrode according to <No. 24>, further comprising, in addition to the aforementioned measuring means, a different measuring means for measuring the surface of the electrode sheet for the battery. <Part 26> The manufacturing control method for battery electrodes described in <No. 25>, which has a display screen that displays the condition of the roll, and displays different shaped icons for dirt, scratches, cracks, deplating, etc. <Part 27> A manufacturing control method for battery electrodes as described in <No. 26>, comprising a display screen that displays the condition of the roll, and which displays the degree of dirt, scratches, cracks, delamination of plating, etc., using icons of different sizes. <Part 28> The aforementioned display screen shows the abnormal situation and the recommended or instructed action to be taken, as described in <Part 27>, regarding the manufacturing control method for battery electrodes. <Part 29> A manufacturing control method for battery electrodes according to any one of paragraphs 16 to 28, which involves identifying an abnormal portion on the electrode sheet, instructing a worker or manager to cut and remove the region in the electrode sheet containing the abnormal portion, or automatically eliminating the region in the electrode sheet containing the abnormal portion. <Part 30> A manufacturing control method for battery electrodes according to <29>, wherein after identifying the abnormal part, a detailed examination is performed using information from a measurement means different from the measurement means, and thereafter, the worker or manager is instructed to cut and remove the area in the electrode sheet containing the abnormal part, or the area in the electrode sheet containing the abnormal part is automatically removed. [Explanation of Symbols]

[0099] 1: Electrode sheet 2A, 2B: Roll 5A, 5B: Array-type sensors 6A, 6B: Sensors 7: Manufacturing control equipment 8: Roll operation control device 10A, 10B: Measurement 11A, 11B: Measurement 12: Electrode sheet direction of travel 15: Roll drive signal 16: Roll drive information 20A, 20B: Measurement results 21A, 21B: Measurement results 31: Communication device 32: Storage device 33: Memory 34: Input device 35:Display device 40: Arithmetic device 41: Data Collection Department 42: Comparison Section 43: Abnormality determination section 44: Anomaly Response Database 100: Sensing 101: Scan direction 110: Data 111: Dirt 112: Plating wear or detachment 200: Laser Diode 201: Light receiving sensor 210: Laser light 211:Reflected light 250: Abnormal part 251: Abnormal area 252: Discard area 253: Usage area 300:Display screen 301: Display target 311: Dirt 312: Foreign matter 315: Dirt exceeding the threshold 316: Dropout due to exceeding the threshold 317: Abnormal area on electrode sheet 320: Warning message for dirt exceeding threshold 321: Instructions to perform roll cleaning. 322: Warning message for dropping out due to exceeding the threshold 323: Instruction to perform roll replacement. 325: Warning message indicating an abnormality on the sheet exceeding the threshold. 326: Instruction to discard abnormal parts 330: Linear Instructions H: Height X1: Roll position X2: Seat position S1: Upper threshold S2: Lower threshold ST: Reference value

Claims

1. It has a roll press device that presses electrode sheets for batteries by passing them between a pair of rolls, A manufacturing apparatus for battery electrodes, having measuring means for measuring the surface of each of the pair of rolls.

2. The manufacturing apparatus for battery electrodes according to claim 1, wherein the measuring means for measuring the surface of the roll is arranged in an array.

3. The apparatus for manufacturing battery electrodes according to claim 2, wherein the measuring means for measuring the surface of the roll swings in the longitudinal direction of the roll.

4. The manufacturing apparatus for battery electrodes according to claim 1, wherein the measurement results obtained by the aforementioned measuring means allow for the determination of the conditions on the roll surface based on the change from a reference value.

5. The manufacturing apparatus for battery electrodes according to claim 2, wherein the measurement results obtained by the aforementioned measuring means allow for the determination of the conditions on the roll surface based on the change from a reference value.

6. The manufacturing apparatus for battery electrodes according to claim 3, wherein the measurement results obtained by the aforementioned measuring means allow for the determination of the conditions on the roll surface based on the change from a reference value.

7. The battery electrode manufacturing apparatus according to claim 6, wherein the measurement result obtained by the aforementioned measuring means is judged to be abnormal when it exceeds or falls below a threshold.

8. The manufacturing apparatus for battery electrodes according to claim 7, wherein the measurement results obtained by the aforementioned measuring means allow for the differentiation of abnormal conditions based on polarity relative to a reference value.

9. The manufacturing apparatus for battery electrodes according to claim 8, which can distinguish and determine dirt adhering to the roll from scratches, cracks, plating detachment, etc., based on the polarity relative to the aforementioned reference value.

10. The battery electrode manufacturing apparatus according to claim 9, wherein when the amount of dirt adhering to the roll exceeds a threshold, the apparatus instructs or recommends cleaning the roll.

11. The battery electrode manufacturing apparatus according to claim 10, wherein when scratches, cracks, or delamination of the plating on the roll exceed a threshold, the apparatus instructs or recommends replacing the roll.

12. The battery electrode manufacturing apparatus according to claim 11, further comprising, in addition to the aforementioned measuring means, a measuring means different in method from the aforementioned measuring means for measuring the surface of the electrode sheet for the battery.

13. The battery electrode manufacturing apparatus according to claim 12, which has a display screen that displays the condition of the roll, and displays dirt, scratches, cracks, deplating, etc. with icons of different shapes.

14. The manufacturing apparatus for battery electrodes according to claim 13, which has a display screen for displaying the condition of the roll, and displays the degree of dirt, scratches, cracks, delamination of plating, etc., using icons of different sizes.

15. The battery electrode manufacturing apparatus according to claim 14, wherein the display screen shows the abnormal situation and recommends or instructs on the appropriate action.

16. A battery electrode manufacturing apparatus according to any one of claims 1 to 15, which identifies an abnormal portion on the electrode sheet and instructs an operator or manager to cut and remove the region in the electrode sheet containing the abnormal portion, or automatically removes the region in the electrode sheet containing the abnormal portion.

17. The battery electrode manufacturing apparatus according to claim 16, wherein, after identifying the abnormal part, a detailed examination is performed using information from a measurement means different from the measurement means, and thereafter, the operator or manager is instructed to cut and remove the area in the electrode sheet containing the abnormal part, or the area in the electrode sheet containing the abnormal part is automatically removed.

18. It has a roll press device that presses electrode sheets for batteries by passing them between a pair of rolls, A manufacturing control method for battery electrodes, comprising determining the surface of each of the pair of rolls based on the measurement results obtained by a measuring means for measuring the surface of the rolls.

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