Electrode processing equipment, battery cells and their manufacturing methods, battery devices and electrical equipment

Abstract

This invention proposes an electrode processing device, which includes a detection processing module and a sorting module. The detection processing module has a detection unit for detecting whether there are surface defects in the electrode rolls, a die-cutting device for sequentially cutting the electrode rolls into tabs according to the length range of a corresponding strip, and, based on the detection results of the detection unit, cutting the electrode rolls without defects into tabs at unequal intervals and cutting the defective electrode rolls into tabs at equal intervals. A marking device is used to mark the defective electrode rolls. The sorting module has an identification device for identifying whether the electrode rolls have markings, a cutting device for cutting the electrode rolls into strips according to the length range, a first collecting device for winding up the strips without markings, and a sorting and extraction device for conveying the strips with markings to a second collecting device. The second collecting device is used to cut the strips with markings into multiple unit electrodes and discard the unit electrodes with markings.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and in particular to an electrode processing equipment, a cell manufacturing method, a cell, a battery device, and an electrical device. Background Technology

[0002] In the multi-electrode winding process, it is essential to ensure that the entire surface of the positive / negative material strip is free of coating defects. Current inspection methods involve performing defect detection after die-cutting. If a defect is detected on a strip, the entire strip must be discarded and scrapped, rendering it unusable for battery cell production. This existing defect detection and mitigation approach results in a high scrap rate, leading to significant waste and increased manufacturing costs. Summary of the Invention

[0003] A primary objective of this invention is to overcome at least one of the deficiencies of the prior art and to provide an electrode processing device with a low scrap rate.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] According to one aspect of the present invention, an electrode processing apparatus is provided, comprising a detection processing module and a sorting module; the detection processing module includes two detection units, a die-cutting device, and a marking device arranged sequentially; the two detection units are respectively used to detect whether there are surface defects on both sides of the electrode roll; the die-cutting device is used to sequentially cut the electrode roll with tabs according to the length range of a corresponding strip, and according to the detection results of the detection units, to cut the electrode roll without defects within the length range with tabs at unequal intervals, and to cut the electrode roll with defects within the length range with tabs at equal intervals; the marking device is used to mark the defective electrode roll. The electrode rolls are marked; the sorting module includes an identification device, a cutting device, a first collecting device, a sorting and extraction device, and a second collecting device. The identification device is used to identify whether the electrode rolls have markings. The cutting device is used to cut the electrode rolls into strips according to their length range. The first collecting device is used to wind up the strips without markings. The sorting and extraction device is located between the identification device and the first collecting device and is used to transport the marked strips to the second collecting device. The second collecting device is used to cut the marked strips into multiple unit electrode sheets and discard the marked unit electrode sheets.

[0006] In one embodiment of the present invention, the distance between the detection unit and the die-cutting device is greater than or equal to the length of one strip of material.

[0007] In one embodiment of the present invention, the detection and processing module further includes an unwinding station for placing the electrode roll, and the two detection units are located between the unwinding station and the die-cutting device, so that the pulled-out electrode roll passes through the detection unit and is then conveyed to the die-cutting device.

[0008] In one embodiment of the present invention, the two sides of the electrode roll each have an electrode tab; wherein, the detection and processing module further includes a slitting device, which is disposed between the electrode tab cutting device and the marking device, for slitting the electrode roll into two sub-electrode rolls, one side of the sub-electrode roll having the electrode tab, and the sorting module is for the sub-electrode roll.

[0009] In one embodiment of the present invention, the sorting module further includes a guide roller, which is located between the identification device and the cutting device and is used to wind the pole roll after it has been identified by the identification device.

[0010] In one embodiment of the present invention, the sorting module further includes a clamping mechanism disposed between the roller and the cutting device for clamping the electrode roll for cutting by the cutting device.

[0011] In one embodiment of the invention, the first collecting device includes a winding needle for finishing the strip without markings.

[0012] In one embodiment of the present invention, the second collection device includes a sorting drive mechanism, a conveyor belt, a slicing mechanism, and a receiving box. The conveyor belt is connected between the sorting drive mechanism and the slicing mechanism. The sorting drive mechanism is used to sort the marked material strip onto the conveyor belt according to the identification result of the identification device. The slicing mechanism is used to cut the marked material strip into multiple unit electrodes. The receiving box is used to accommodate the multiple unit electrodes.

[0013] As can be seen from the above technical solution, the advantages and positive effects of the electrode processing equipment proposed in this invention are as follows:

[0014] The electrode processing equipment proposed in this invention places a surface defect detection unit before the die-cutting position of the electrode roll. Based on the detection results, it selectively uses non-equidistant and equidistant tab cutting methods to correspond to electrode rolls with and without defects, respectively. The defective electrode rolls are then marked according to the detection results. Accordingly, after cutting the electrode roll into strips, the defect-free strips are wound up, and the defective strips are cut into multiple unit electrode sheets. The marked unit electrode sheets are discarded, and the remaining unit electrode sheets are collected for use in the stacking production of battery cells. Through this design, this invention can reduce the strips to be discarded down to the marked unit electrode sheets, avoiding the scrapping of the entire strip due to surface defects in a small section of electrode sheet, significantly reducing the scrap rate, minimizing raw material waste, and saving on battery cell manufacturing costs.

[0015] Another major objective of this invention is to overcome at least one of the defects of the prior art and provide a method for manufacturing battery cells that can effectively save manufacturing costs.

[0016] To achieve the above objectives, the present invention adopts the following technical solution:

[0017] According to another aspect of the present invention, a method for manufacturing a battery cell is provided, comprising: detecting whether surface defects exist on both sides of an electrode roll; sequentially cutting the electrode roll with tabs according to the length range of a corresponding strip, wherein electrode rolls without defects within the length range are cut with tabs at unequal intervals, and strips with defects within the length range are cut with tabs at equal intervals, the unequal-interval tab cutting and the equal-interval tab cutting are performed alternately according to the output sequence of the strips; affixing defective markings to the surface of defective electrode rolls; identifying whether the electrode rolls have defective markings affixed, cutting the electrode rolls into strips, selectively cutting the strips with defective markings affixed into multiple unit electrode sheets, and discarding the unit electrode sheets with defective markings affixed, then using the remaining unit electrode sheets to manufacture a battery cell by stacking, and selectively using the strips without defective markings affixed by winding to manufacture a battery cell.

[0018] In one embodiment of the present invention, the distance between the location of the detected surface defect and the location of the die-cutting is greater than or equal to the length of a die-cut strip.

[0019] In one embodiment of the present invention, the material strip has tabs on both sides. After the tab cutting step, the material strip is further divided into two sub-material strips, each sub-material strip has tabs on one side. The subsequent steps of attaching defective labels, identifying defective labels, and manufacturing battery cells are all for the sub-material strips.

[0020] As can be seen from the above technical solution, the advantages and positive effects of the cell manufacturing method proposed in this invention are as follows:

[0021] The battery cell manufacturing method proposed in this invention detects surface defects in the electrode rolls before die-cutting. Based on the detection results, non-equidistant and equidistant tab cutting methods are selectively used to correspond to electrode rolls with and without defects, respectively. Defective electrode rolls are marked according to the detection results. Then, after cutting the electrode rolls into strips, the non-defective strips are wound up, and the defective strips are cut into multiple unit electrode sheets. The marked unit electrode sheets are discarded, and the remaining unit electrode sheets are collected for use in battery cell stacking production. Through this design, this invention can reduce the strips to be discarded down to marked unit electrode sheets, avoiding the scrapping of the entire strip due to surface defects in a small section of electrode sheet, significantly reducing the scrap rate, minimizing raw material waste, and saving battery cell manufacturing costs.

[0022] Another major objective of this invention is to overcome at least one of the defects of the prior art and provide a battery cell with a lower manufacturing cost.

[0023] To achieve the above objectives, the present invention adopts the following technical solution:

[0024] According to another aspect of the present invention, a battery cell is provided, wherein the battery cell is manufactured by the battery cell manufacturing method proposed in the present invention and described in the above embodiments.

[0025] As can be seen from the above technical solution, the advantages and positive effects of the battery cell proposed in this invention are as follows:

[0026] The battery cell proposed in this invention is manufactured using the battery cell manufacturing method proposed in this invention, and has the advantage of low manufacturing cost.

[0027] Another major objective of this invention is to overcome at least one of the defects of the prior art and provide a battery device with a lower manufacturing cost.

[0028] To achieve the above objectives, the present invention adopts the following technical solution:

[0029] According to another aspect of the present invention, a battery device is provided, wherein the battery cell proposed in the present invention is included.

[0030] As can be seen from the above technical solution, the advantages and positive effects of the battery device proposed in this invention are as follows:

[0031] The battery device proposed in this invention has the advantage of lower manufacturing cost by using the battery cell proposed in this invention.

[0032] Another major objective of this invention is to overcome at least one of the defects of the prior art described above and to provide an electrical device with a lower manufacturing cost for a battery device.

[0033] To achieve the above objectives, the present invention adopts the following technical solution:

[0034] According to another aspect of the present invention, an electrical device is provided, wherein the battery device described herein is included.

[0035] As can be seen from the above technical solution, the advantages and positive effects of the electrical equipment proposed in this invention are as follows:

[0036] The electrical equipment proposed in this invention, by employing the battery device proposed in this invention, has the advantage of lower manufacturing cost of the battery device. Attached Figure Description

[0037] Various objects, features, and advantages of the invention will become more apparent from the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are merely illustrative of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0038] Figure 1 This is a system schematic diagram of an electrode processing apparatus according to an exemplary embodiment;

[0039] Figure 2 This is a schematic flowchart illustrating a method for manufacturing a battery cell according to an exemplary embodiment.

[0040] The annotations in the attached figures are explained as follows:

[0041] 101. Extreme roll;

[0042] 1011. Electrode;

[0043] 102. Ziji volume;

[0044] 103. Unit electrode;

[0045] 210. Detection unit;

[0046] 220. Die-cutting device;

[0047] 230. Marking device;

[0048] 231. Inappropriate labeling;

[0049] 310. Identification device;

[0050] 320. Roller pass;

[0051] 330. Clamping mechanism;

[0052] 340. Cutting device;

[0053] 351. Coiling needle;

[0054] 361. Sorting drive mechanism;

[0055] 362. Conveyor belt;

[0056] 363. Slicing mechanism;

[0057] 364. Receiving box;

[0058] A. Surface defects;

[0059] L1. Spacing;

[0060] L2 length. Detailed Implementation

[0061] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the description and drawings therein are for illustrative purposes only and not intended to limit the present invention.

[0062] In the following description of different exemplary embodiments of the invention, reference is made to the accompanying drawings, which form part of the invention, and in which different exemplary structures, systems, and steps that can implement various aspects of the invention are shown by way of example. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of the invention. Furthermore, although the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of the invention, these terms are used herein only for convenience, such as the orientation according to the examples shown in the drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the invention.

[0063] See Figure 1 The diagram illustrates a typical system schematic of the electrode processing equipment proposed in this invention. In this exemplary embodiment, the electrode processing equipment is described using an example of its application in the production of multi-tab 1011 winding processes. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below to apply the relevant designs of this invention to other types of electrode processing production; these changes remain within the scope of the principles of the electrode processing equipment proposed in this invention.

[0064] like Figure 1 As shown, in one embodiment of the present invention, the electrode processing equipment proposed by the present invention includes a detection and processing module and a sorting module. See also... Figure 1The accompanying drawings specifically illustrate the main devices and components included in the detection and processing module and the sorting module, and schematically show the morphology of the electrode sheets at each device, such as electrode roll 101, sub-electrode roll 102, and unit electrode sheet 103. The structure, connection method, and functional relationship of the main components of the electrode processing equipment proposed in this invention will be described in detail below with reference to the accompanying drawings.

[0065] like Figure 1 As shown, in one embodiment of the present invention, the inspection and processing module includes two inspection units 210, a die-cutting device 220, and a marking device arranged in sequence. The "arranged in sequence" can be understood as being along the conveying extension direction of the unwinding and pulling out of the electrode roll 101. Specifically, the two inspection units 210 are used to detect whether surface defects A exist on both sides of the electrode roll 101. The die-cutting device 220 is used to sequentially cut the tabs 1011 of the electrode roll 101 according to the length range corresponding to a material strip (i.e., the material strip cut by the cutting device 340 in the sorting module below). In other words, the die-cutting device 220 cuts the tabs 1011 on the electrode roll 101 sequentially according to this length range. Furthermore, based on the inspection results of the inspection units 210, electrode rolls 101 without defects within the length range are cut with tabs 1011 at unequal intervals, while electrode rolls 101 with defects within the length range are cut with tabs 1011 at equal intervals. The so-called unequal-spacing tab 1011 cutting can be understood as multiple tabs 1011 cut from a section of electrode roll 101 within a certain length range having unequal spacing, and roughly conforming to a pattern of gradually increasing or decreasing spacing (facilitating the alignment of each layer of tabs 1011 during subsequent winding and core making processes). This marking device is used to mark defective electrode rolls 101. Specifically, for a section of electrode roll 101 without defects (i.e., corresponding to a normal strip), when it is wound up by the first collecting device in the subsequent sorting module, the overall circumference of the winding structure increases after each turn, therefore the spacing of the tabs 1011 needs to be designed to gradually increase. Furthermore, for a defective section of the electrode roll 101 (i.e., a defective strip), since it cannot be properly wound into a battery cell, and after being cut by the second collection device in the subsequent sorting module, it adopts a stacked core-making process, i.e., stacking up the unit electrode sheets 103 one by one, the tabs 1011 need to adopt a design with consistent spacing.

[0066] like Figure 1As shown, in one embodiment of the present invention, the sorting module includes an identification device 310, a cutting device 340, a first collecting device, a sorting extraction device, and a second collecting device. Specifically, the identification device 310 is used to identify whether the electrode roll 101 has a mark. The cutting device 340 is used to cut the electrode roll 101 into multiple strips according to the aforementioned length range. The first collecting device is used to wind up the strips without marks so that these strips can be used to make battery cells. Since the tabs 1011 of the electrode roll 101 corresponding to the length range of these strips are cut into unequal spacing, the positions of each layer of tabs 1011 can be ensured to correspond to each other after winding, thereby forming the terminal posts of the battery cell. The sorting and extraction device is located between the identification device 310 and the first collection device. The sorting and extraction device is used to transport the marked material strip to the second collection device. The second collection device is used to further cut the marked material strip into multiple unit electrode sheets 103 and remove the marked unit electrode sheets 103. In other words, for the marked material strip, when it is cut into multiple unit electrode sheets 103, usually only one or a part of the unit electrode sheets 103 are marked. After removing the marked unit electrode sheets 103, the remaining unmarked unit electrode sheets 103 can still be collected and stacked for core making in subsequent processes. Since the tabs 1011 of the electrode roll 101 corresponding to the length range of these material strips are cut into an equally spaced shape, the positions of the tabs 1011 of each layer of unit electrode sheets 103 can be guaranteed to correspond to each other after stacking, so as to form the electrode post of the battery cell.

[0067] Through the above design, the present invention can reduce the strip that needs to be rejected to the marked unit electrode 103, avoiding the rejection and scrapping of the entire strip due to a surface defect A in a small section of the electrode, greatly reducing the scrap rate, reducing the waste of raw materials, and saving the manufacturing cost of the battery cell.

[0068] like Figure 1 As shown, in one embodiment of the present invention, the distance L1 between the detection unit 210 and the die-cutting device 220 can be greater than the length L2 of a strip (i.e., the length of a length range). Through this design, the present invention ensures that when the detection unit 210 detects surface defect A, the die-cutting device 220 can continue to cut the tabs 1011 of a complete length range (i.e., corresponding to a complete strip) using an unequal-spacing cutting method, and then switch to an equal-spacing tab 1011 cutting method to address the length range of the detected surface defect A. In some embodiments, the distance L1 between the detection unit 210 and the die-cutting device 220 can also be equal to the length L2 of a strip, and is not limited to this embodiment.

[0069] like Figure 1As shown, in one embodiment of the present invention, the detection and processing module may further include an unwinding station, which can be used to place the electrode roll 101, and two detection units 210 are located between the unwinding station and the die-cutting device 220, so that the pulled-out electrode roll 101 is conveyed to the die-cutting device 220 after passing through the detection unit 210.

[0070] like Figure 1 As shown, in one embodiment of the present invention, the electrode roll 101 has tabs 1011 on each of its two sides. Based on this, the detection and processing module may further include a slitting device disposed between the tab 1011 cutting device 340 and the marking device. The slitting device cuts the electrode roll 101 into two sub-electrode rolls 102. Each sub-electrode roll 102 has tabs 1011 on one side, and the sorting module is designed for this sub-electrode roll 102. That is, the identification device 310 is used to identify whether the sub-electrode roll 102 has a mark, and the cutting device 340 is used to cut the sub-electrode roll 102 into multiple strips. Furthermore, when the present invention uses a slitting device to cut the electrode roll 101 into two sub-electrode rolls 102, the marking device marks the sub-electrode roll 102. The specific marking position can be located on the other side of the sub-electrode roll 102, that is, one of the two sides of the sub-electrode roll 102 has the cut tabs 1011, and the other can be used for marking, for example, but not limited to, affixing a label.

[0071] like Figure 1 As shown, in one embodiment of the present invention, the sorting module may further include a guide roller 320, which is located between the identification device 310 and the cutting device 340. The guide roller 320 is used to wind the pole roll 101 (specifically, the sub-pole roll 102 mentioned above) after it has been identified by the identification device 310.

[0072] like Figure 1 As shown, based on the design of the sorting module including the guide roller 320, in one embodiment of the present invention, the sorting module may further include a clamping mechanism 330. This clamping mechanism 330 is disposed between the guide roller 320 and the cutting device 340, and is used to clamp the electrode roll 101 (specifically, the sub-electrode roll 102 described above) for cutting by the cutting device 340. Through the above design, the present invention can ensure the positioning of the electrode roll 101 when cutting it.

[0073] like Figure 1 As shown, in one embodiment of the present invention, the first collecting device may include a winding needle 351 for finishing off unmarked strips.

[0074] like Figure 1As shown, in one embodiment of the present invention, the second collection device may include a sorting drive mechanism 361, a conveyor belt 362, a slicing mechanism 363, and a receiving box 364. Specifically, the conveyor belt 362 is connected between the sorting drive mechanism 361 and the slicing mechanism 363. The sorting drive mechanism 361 may, but is not limited to, employ a vacuum transfer mechanism, which can be used to sort the marked strips to the conveyor belt 362 according to the identification result of the identification device 310. The slicing mechanism 363 is used to cut the marked strips into multiple unit electrode sheets 103. The receiving box 364 is used to accommodate multiple unit electrode sheets 103.

[0075] As described above, during the production process of this invention, if the identification device 310 fails to identify the defective label 231, the normal production process continues. When the end of a strip reaches the cutting device 340, the clamping mechanism 330 clamps it, the cutting device 340 cuts the strip, and the winding needle 351 completes the finishing. At this time, the sorting drive mechanism 361 is not activated, and the clamping mechanism 330, holding the electrode sheet, feeds it downwards into the winding needle 351 to continue the production of the next strip. If the identification device 310 identifies the defective label 231, after the previous normal strip is wound, the sorting drive mechanism 361 starts working when the clamping mechanism 330 holds the strip with the defective label 231 and feeds it downwards. The electrode sheet is pulled by the sorting drive mechanism 361 to the conveyor belt 362 and transported to the slicing mechanism 363. The slicing mechanism 363 cuts it into multiple unit electrode sheets 103, which are collected by the receiving box 364. Once the receiving box 364 is full, the unit electrode 103 with defective label 231 is removed, and the other normal unit electrode 103 can be used for stacking production.

[0076] It should be noted that the electrode processing apparatus shown in the accompanying drawings and described in this specification are merely a few examples among many electrode processing apparatuses capable of employing the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any detail or component of the electrode processing apparatus shown in the accompanying drawings or described in this specification.

[0077] In summary, the electrode processing equipment proposed in this invention places the surface defect A detection unit 210 before the die-cutting position of the electrode roll 101. Based on the detection results of the detection unit 210, it selectively uses non-equidistant and equidistant spacing electrode tabs 1011 to cut electrode rolls 101 of different lengths, corresponding to those without defects and those with defects, respectively. The defective electrode rolls 101 are then marked based on the detection results. Accordingly, after cutting the electrode roll 101 into strips, the defect-free strips are wound up, and the defective strips are cut into multiple unit electrode sheets 103. The marked unit electrode sheets 103 are discarded, and the remaining unit electrode sheets 103 are collected for use in the stacking production of battery cells. Through the above design, this invention can reduce the strips to be discarded down to the marked unit electrode sheets 103, avoiding the rejection of the entire strip due to a small section of electrode sheet having surface defect A, significantly reducing the scrap rate, reducing raw material waste, and saving battery cell manufacturing costs.

[0078] Based on the detailed description of several exemplary embodiments of the electrode processing equipment proposed in this invention above, several exemplary embodiments of the cell manufacturing method proposed in this invention will be described below.

[0079] See Figure 2 This illustration represents a schematic flowchart of the cell manufacturing method proposed in this invention. In this exemplary embodiment, the cell manufacturing method proposed in this invention is described using the multi-tab 1011 winding process as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the following specific embodiments to apply the relevant designs of this invention to other types of electrode processing and production; these changes are still within the scope of the principles of the cell manufacturing method proposed in this invention.

[0080] like Figure 2 As shown, in one embodiment of the present invention, the battery cell manufacturing method proposed by the present invention includes:

[0081] Check whether surface defects A exist on both sides of the electrode roll 101;

[0082] The electrode roll 101 is cut with tabs 1011 sequentially according to the length range of the corresponding material strip. The electrode roll 101 without defects within the length range is cut with tabs 1011 at unequal intervals, while the material strip with defects within the length range is cut with tabs 1011 at equal intervals. The cutting of tabs 1011 at unequal intervals and the cutting of tabs 1011 at equal intervals are performed alternately according to the output sequence of the material strip.

[0083] Affix defective markings to the surface of defective electrode roll 101;

[0084] Identify whether the electrode roll 101 has a defective label attached, cut the electrode roll 101 into a strip, selectively cut the strip with defective labels into multiple unit electrode sheets 103, and remove the unit electrode sheets 103 with defective labels. Then, use the stacking method to make the remaining unit electrode sheets 103 into a battery cell, and selectively use the winding method to make the strip without defective labels into a battery cell.

[0085] In one embodiment of the present invention, the distance between the location of the detected surface defect A and the die-cutting location can be greater than or equal to the length of a die-cut strip.

[0086] In one embodiment of the present invention, the material strip has tabs 1011 on both sides. After the step of cutting the material strip with tabs 1011, the method may further include: cutting the material strip into two sub-material strips, each sub-material strip having tabs 1011 on one side. The subsequent steps of attaching defective labels, identifying defective labels, and manufacturing battery cells are all for the sub-material strips.

[0087] It should be noted that the cell manufacturing methods shown in the accompanying drawings and described in this specification are merely a few examples among many cell manufacturing methods capable of employing the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any detail or step of the cell manufacturing methods shown in the accompanying drawings or described in this specification.

[0088] In summary, the cell manufacturing method proposed in this invention detects surface defects A in the electrode roll 101 before the die-cutting position. Based on the detection results of the detection unit 210, it selectively uses non-equidistant and equidistant electrode tabs 1011 to cut electrode rolls 101 of different lengths, corresponding to those without defects and those with defects, respectively. The defective electrode rolls 101 are then marked based on the detection results. After cutting the electrode roll 101 into strips, the defect-free strips are wound up, and the defective strips are cut into multiple unit electrode sheets 103. The marked unit electrode sheets 103 are discarded, and the remaining unit electrode sheets 103 are collected for use in the cell stacking production. Through this design, this invention can reduce the strips to be discarded down to marked unit electrode sheets 103, avoiding the scrapping of the entire strip due to surface defects A in a small section of electrode sheet, significantly reducing the scrap rate, minimizing raw material waste, and saving on cell manufacturing costs.

[0089] For example, compared to the traditional processing method that discards the entire roll of material with surface defect A, the cell manufacturing method proposed in this invention combines equal tab 1011 spacing cutting and stacking processes, which can effectively reduce scrap. If a roll of material with surface defect A includes n tabs 1011, the existing processing method scraps the entire roll, while the cell manufacturing method proposed in this invention only requires the scrapping of one unit electrode 103, reducing scrap by n-1 / n*100%. Specifically, taking the production process of a certain type of cell as an example, the current single-roll scrap rate is 2.5%. A roll of material for this type of cell includes 35 tabs 1011 during the manufacturing process. Using this invention, the single-roll scrap rate can be reduced from 2.5% to 0.071%. The calculation process for the aforementioned reduction in scrap rate is roughly as follows: The scrap rate in the existing scheme is set at 2.5%, which means that out of 1000 electrode sheets, 25 electrode sheets (e.g., one electrode sheet contains 35 unit electrode sheets) need to be scrapped, i.e., the scrap rate is 25 / 1000 = 2.5%. In contrast, using the technical solution proposed in this invention, the 25 scrapped electrode sheets only require the scrapping of 25 unit electrode sheets, resulting in a scrap rate of 25 / (1000*35) ≈ 0.071%.

[0090] Based on the detailed description of several exemplary embodiments of the battery cell manufacturing method proposed in this invention above, an exemplary embodiment of the battery cell proposed in this invention will be described below.

[0091] In one embodiment of the present invention, the battery cell proposed in the present invention is manufactured by the battery cell manufacturing method proposed in the present invention and described in detail in the above embodiments.

[0092] It should be noted that the battery cells shown in the accompanying drawings and described in this specification are merely a few examples among many types of battery cells capable of employing the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any detail or component of the battery cells shown in the accompanying drawings or described in this specification.

[0093] In summary, the battery cell proposed in this invention, manufactured using the battery cell manufacturing method proposed in this invention, has the advantage of low manufacturing cost.

[0094] Based on the detailed description of an exemplary embodiment of the battery cell proposed in this invention above, an exemplary embodiment of the battery device proposed in this invention will be described below.

[0095] In one embodiment of the present invention, the battery device proposed by the present invention includes the battery cell proposed by the present invention and described in detail in the above embodiments.

[0096] It should be noted that the battery devices shown in the accompanying drawings and described in this specification are merely a few examples among many battery devices capable of employing the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any detail or component of the battery devices shown in the accompanying drawings or described in this specification.

[0097] In summary, the battery device proposed in this invention, by employing the battery cell proposed in this invention, has the advantage of lower manufacturing cost.

[0098] Based on the detailed description of an exemplary embodiment of the battery device proposed in this invention above, an exemplary embodiment of the electrical device proposed in this invention will be described below.

[0099] In one embodiment of the present invention, the electrical device proposed by the present invention includes the battery device proposed by the present invention and described in detail in the above embodiments.

[0100] It should be noted that the electrical appliances shown in the accompanying drawings and described in this specification are merely a few examples among many electrical appliances from which the principles of the present invention can be applied. It should be clearly understood that the principles of the present invention are by no means limited to any detail or component of the electrical appliances shown in the accompanying drawings or described in this specification.

[0101] In summary, the electrical equipment proposed in this invention, by employing the battery device proposed in this invention, has the advantage of lower manufacturing cost of the battery device.

[0102] The foregoing describes and / or illustrates in detail exemplary embodiments of the electrode processing equipment, cell manufacturing method, cell, battery device, and electrical equipment proposed by the present invention. However, the embodiments of the present invention are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms "a," "an," and "the above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising," "including," and "having" are used to indicate an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to those listed. Furthermore, the terms "first" and "second," etc., in the claims and specification are used only as illustrative marks and are not intended to limit the numerical scope of the subject matter.

[0103] Although the electrode processing equipment, cell manufacturing method, cell, battery device and electrical equipment proposed in this invention have been described according to different specific embodiments, those skilled in the art will recognize that modifications can be made to the implementation of this invention within the spirit and scope of the claims.

Claims

1. An electrode processing device, characterized in that, include: The inspection and processing module includes two inspection units, a die-cutting device, and a marking device arranged in sequence. The two inspection units are used to inspect whether there are surface defects on both sides of the electrode roll. The die-cutting device is used to cut the electrode roll with tabs sequentially according to the length range of a corresponding strip. Based on the inspection results of the inspection units, the electrode roll without defects within the length range is cut with tabs at unequal intervals, and the electrode roll with defects within the length range is cut with tabs at equal intervals. The marking device is used to mark the defective electrode roll. The sorting module includes an identification device, a cutting device, a first collecting device, a sorting and extraction device, and a second collecting device. The identification device is used to identify whether the electrode roll has a mark. The cutting device is used to cut the electrode roll into strips according to a length range. The first collecting device is used to wind up the strips without marks. The sorting and extraction device is disposed between the identification device and the first collecting device and is used to transport the strips with marks to the second collecting device. The second collecting device is used to cut the strips with marks into multiple unit electrodes and discard the unit electrodes with marks.

2. The electrode processing equipment according to claim 1, characterized in that, The distance between the detection unit and the die-cutting device is greater than or equal to the length of one strip of material.

3. The electrode processing equipment according to claim 1, characterized in that, The inspection and processing module also includes an unwinding station for placing electrode rolls. The two inspection units are located between the unwinding station and the die-cutting device so that the pulled-out electrode rolls pass through the inspection units before being conveyed to the die-cutting device.

4. The electrode processing equipment according to claim 1, characterized in that, The electrode roll has tabs on both sides; the detection and processing module further includes a slitting device, which is disposed between the tab cutting device and the marking device, for cutting the electrode roll into two sub-electrode rolls, each sub-electrode roll having a tab on one side, and the sorting module is for the sub-electrode rolls.

5. The electrode processing equipment according to claim 1, characterized in that, The sorting module also includes a guide roller, which is located between the identification device and the cutting device and is used to wind the pole roll that has been identified by the identification device.

6. The electrode processing equipment according to claim 5, characterized in that, The sorting module also includes a clamping mechanism, which is disposed between the roller and the cutting device to clamp the electrode roll for cutting by the cutting device.

7. The electrode processing equipment according to claim 1, characterized in that, The first collecting device includes a winding needle for finishing the strip that is not marked.

8. The electrode processing equipment according to claim 1, characterized in that, The second collection device includes a sorting drive mechanism, a conveyor belt, a slicing mechanism, and a receiving box. The conveyor belt is connected between the sorting drive mechanism and the slicing mechanism. The sorting drive mechanism is used to sort the marked material strip onto the conveyor belt according to the identification result of the identification device. The slicing mechanism is used to cut the marked material strip into multiple unit electrodes. The receiving box is used to accommodate the multiple unit electrodes.

9. A method for manufacturing a battery cell, characterized in that, include: Check both sides of the electrode roll for surface defects; The electrode rolls are sequentially cut with tabs according to the length range of the corresponding strip. The electrode rolls without defects within the length range are cut with tabs at unequal intervals, while the strips with defects within the length range are cut with tabs at equal intervals. The tab cutting with unequal intervals and the tab cutting with equal intervals are performed alternately according to the output sequence of the strips. Defective markings are affixed to the surface of the defective electrode roll; Identify whether the electrode roll has a defective label attached, cut the electrode roll into strips, selectively cut the strips with defective labels into multiple unit electrode sheets, and remove the unit electrode sheets with defective labels. Then, use the remaining unit electrode sheets to make cells by stacking. Selectively use the strips without defective labels to make cells by winding.

10. The method for manufacturing a battery cell according to claim 9, characterized in that, The distance between the location of the surface defect detection and the die-cutting location is greater than or equal to the length of a strip.

11. The method for manufacturing a battery cell according to claim 9, characterized in that, The strip has tabs on both sides. After the tab cutting step, the strip is further divided into two sub-strips. Each sub-strip has a tab on one side. The subsequent steps of attaching defective labels, identifying defective labels, and manufacturing battery cells are all for the sub-strips.

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