Pole piece structure, pole piece manufacturing control system, control method and battery cell

Abstract

The invention relates to a pole piece structure, a pole piece manufacturing control system, a control method and a battery cell. A base material in the pole piece structure is provided with a tab area, a first cutting area and a second cutting area; the tab area is positioned between the first cutting area and the second cutting area; the slurry layer is divided into a first slurry layer and a second slurry layer, and the first slurry layer is arranged between the first cutting area and the tab area and between the second cutting area and the tab area; the first sizing agent layer is arranged in the first cutting area, the second sizing agent layer is arranged in the first cutting area and the second cutting area, and the thickness of the first sizing agent layer is larger than that of the second sizing agent layer, so that sizing agents in the first cutting area and the second cutting area are thin, and then groove shapes are formed in the first cutting area and the second cutting area respectively. The energy density of the battery is ensured, the stress is uniform during cutting, the cutting surface is flat, short circuit or battery combustion in the battery caused by large-particle falling and burrs at the cutting position is avoided, and the safety and the reliability of the battery are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a pole piece structure, a pole piece manufacturing control system, a control method and a battery cell. Background Art

[0002] The electrode is one of the main components of the battery cell. The electrode is divided into positive electrode and negative electrode. The positive and negative electrode of the battery cell are current collectors with active materials coated on the surface of the foil and having a specific shape. The preparation process of the electrode usually includes stirring, coating, cold pressing and cutting.

[0003] At present, during the coating process of the electrode, the coating area on the surface of the foil is usually of uniform thickness and the coating thickness is relatively thick. When the electrode is cut, it is easy to cause a rough cut section, large particles to fall off and burrs to appear, which will cause melting holes in the battery diaphragm, leading to battery short circuit, low battery voltage or spontaneous combustion risks. Summary of the invention

[0004] Based on this, a pole piece structure, a pole piece manufacturing control system, a control method and a battery cell are provided.

[0005] In a first aspect, the present application provides a pole piece structure, comprising:

[0006] The substrate is provided with a tab region, a first cutting region and a second cutting region; the tab region is located between the first cutting region and the second cutting region;

[0007] The slurry layer is bonded to the substrate, and the slurry layer is divided into a first slurry layer and a second slurry layer. The first slurry layer is arranged between the first cutting area and the tab area and between the second cutting area and the tab area; the second slurry layer is arranged in the first cutting area and the second cutting area, and the thickness of the first slurry layer is greater than the thickness of the second slurry layer.

[0008] In one embodiment, the substrate has a first plate surface and a second plate surface opposite to each other; the first cutting area includes a first cutting sub-area and a second cutting sub-area; the second cutting area includes a third cutting sub-area and a fourth cutting sub-area;

[0009] The first cutting sub-area and the third cutting sub-area are respectively arranged on the first board surface, and the second cutting sub-area and the fourth cutting sub-area are respectively arranged on the second board surface; the first cutting sub-area is arranged correspondingly to the second cutting sub-area, and the third cutting sub-area is arranged correspondingly to the fourth cutting sub-area;

[0010] The projection of the first cutting sub-area from the first board surface to the second board surface at least partially overlaps with the second cutting sub-area, and the projection of the third cutting sub-area from the first board surface to the second board surface at least partially overlaps with the fourth cutting sub-area.

[0011] In one embodiment, the width of the first cutting area is less than or equal to the width of the tab area, and the width of the second cutting area is less than or equal to the width of the tab area.

[0012] In one embodiment, the tab region is located between one third and one third to two thirds of the total length from the first cutting region to the second cutting region.

[0013] In a second aspect, the present application provides a pole piece manufacturing control system for manufacturing a pole piece structure as described above, the pole piece manufacturing control system comprising:

[0014] A transmission mechanism, the transmission mechanism is used to support the substrate; the substrate is provided with a tab area, a first cutting area and a second cutting area according to preset electrode coating data;

[0015] A feeding module, which is used to transfer slurry;

[0016] A control module, the control module is connected to the transmission mechanism and the feeding module; the control module is configured to obtain preset electrode coating data, and according to the preset electrode coating data, control the transmission mechanism to drive the substrate to move at a preset rate;

[0017] The control module is also configured to control the feeding module to apply a first thickness of slurry between the first cutting area and the pole lug area and between the second cutting area and the pole lug area according to a preset rate and preset pole piece coating data, so as to form a first slurry layer between the first cutting area and the pole lug area and between the second cutting area and the pole lug area, and to apply a second thickness of slurry to the first cutting area and the second cutting area, so as to form a second slurry layer in the first cutting area and the second cutting area; the first thickness is greater than the second thickness.

[0018] In one of the embodiments, the control module is further configured to control the feeding module to output slurry based on a first flow rate when the output end of the feeding module corresponds to the first cutting area; control the feeding module to output slurry based on a second flow rate when the output end of the feeding module corresponds to between the first cutting area and the tab area; control the feeding module to be closed when the output end of the feeding module corresponds to the tab area; control the feeding module to output slurry based on the second flow rate when the output end of the feeding module corresponds to between the second cutting area and the tab area; control the feeding module to output slurry based on the first flow rate when the output end of the feeding module corresponds to the second cutting area; the first flow rate is less than the second flow rate.

[0019] In one of the embodiments, it further includes a position detection module, the position detection module is connected to the control module;

[0020] The position detection module is configured to detect the movement distance data of the substrate and transmit the movement distance data to the control module;

[0021] The control module is also configured to control the opening and closing of the feeding module and the slurry output flow rate according to the moving distance data.

[0022] In one embodiment, the feed module includes a pipeline assembly and a valve body assembly; the valve body assembly is disposed on the pipeline assembly;

[0023] The valve body assembly is connected to the control module; the control module is also configured to control the opening and closing and valve opening degree of the valve body assembly according to the movement distance data.

[0024] In one embodiment, the valve body assembly includes a reflux valve, a proportional valve and a feed valve; the pipeline assembly includes a first pipeline, a second pipeline and a third pipeline; the reflux valve, the proportional valve and the feed valve are respectively connected to the control module;

[0025] The first port of the proportional valve is connected to the first port of the feed valve through a first pipeline, and the second port of the proportional valve is connected to the first port of the return valve through a second pipeline;

[0026] The second port of the reflux valve is used for inputting slurry, the third port of the reflux valve is used for reflowing slurry through the third pipeline, and the second port of the feed valve is used for outputting slurry.

[0027] In one of the embodiments, the control module is further configured to control the reflux of the reflux valve to be closed and the supply valve to be opened when the second port of the supply valve corresponds to the first cutting area, and control the proportional valve to be opened based on the first preset opening to form a second slurry layer of a second thickness in the first cutting area;

[0028] When the second port of the supply valve corresponds to between the first cutting area and the tab area, the reflux valve is controlled to be closed and the supply valve is opened, and the proportional valve is controlled to be opened based on the second preset opening to form a first slurry layer of a first thickness between the first cutting area and the tab area;

[0029] When the second port of the supply valve corresponds to the electrode ear area, the proportional valve and the supply valve are controlled to be closed, and the reflux of the reflux valve is controlled to be opened, so as to form an exposed area in the electrode ear area;

[0030] When the second port of the supply valve corresponds to between the second cutting area and the tab area, the reflux valve is controlled to be closed and the supply valve is opened, and the proportional valve is controlled to be opened based on a second preset opening to form a first slurry layer of a first thickness between the second cutting area and the tab area;

[0031] When the second port of the supply valve corresponds to the second cutting area, the reflux valve is controlled to be closed and the supply valve is opened, and the proportional valve is controlled to be opened based on the first preset opening to form a second slurry layer of a second thickness in the second cutting area.

[0032] In one of the embodiments, it further includes a detection feedback module, the detection feedback module is connected to the control module;

[0033] The detection feedback module is used to perform dimensional detection on the coated and formed pole piece structure, obtain dimensional data, and transmit the dimensional data to the control module; the control module determines the qualified rate of the coated and formed pole piece structure according to the dimensional data.

[0034] In a third aspect, the present application provides a pole piece manufacturing control method, which is applied to any pole piece manufacturing control system as described above, and the pole piece manufacturing control method comprises the following steps:

[0035] Obtaining preset pole piece coating data, and according to the preset pole piece coating data, controlling the transmission mechanism to drive the substrate to move based on a preset speed; the substrate is provided with a pole ear area, a first cutting area, and a second cutting area according to the preset pole piece coating data;

[0036] According to the preset rate and the preset electrode coating data, the feeding module is controlled to coat the first thickness of slurry between the first cutting area and the electrode lug area and between the second cutting area and the electrode lug area to form a first slurry layer between the first cutting area and the electrode lug area and between the second cutting area and the electrode lug area, and the second thickness of slurry is coated on the first cutting area and the second cutting area to form a second slurry layer in the first cutting area and the second cutting area; the first thickness is greater than the second thickness.

[0037] In a fourth aspect, the present application provides a battery cell comprising a pole piece structure as described above.

[0038] One of the above technical solutions has the following advantages and beneficial effects:

[0039] The above-mentioned pole piece structure includes a substrate and a slurry layer, the substrate is provided with a pole lug area, a first cutting area and a second cutting area; the pole lug area is located between the first cutting area and the second cutting area; the slurry layer is arranged in contact with the substrate, and the slurry layer is divided into a first slurry layer and a second slurry layer, the first slurry layer is arranged between the first cutting area and the pole lug area and between the second cutting area and the pole lug area; the second slurry layer is arranged in the first cutting area and the second cutting area, and the thickness of the first slurry layer is greater than the thickness of the second slurry layer, and then after cutting the first cutting area and the second cutting area, an optimized pole piece structure can be obtained. The present application coats a second slurry layer on the first cutting area and the second cutting area, and sets the thickness of the second slurry layer to be less than the thickness of the first slurry layer, so that the slurry thickness at the first cutting area and the second cutting area is thinner, thereby forming groove shapes in the first cutting area and the second cutting area respectively. Since the first cutting area and the second cutting area are coated with slurry, the energy density of the battery is guaranteed, and the first cutting area and the second cutting area can be uniformly stressed and the cut surface is smooth when cutting, thereby avoiding large particles and burrs at the cutting position, which may cause internal short circuit of the battery and battery combustion, thereby improving the safety and reliability of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a first structural schematic diagram of the pole piece structure in an embodiment of the present application;

[0041] Figure 2 This is a second structural schematic diagram of the pole piece structure in the embodiment of the present application;

[0042] Figure 3 This is a schematic diagram of the first circuit structure of the pole piece manufacturing control system in an embodiment of the present application;

[0043] Figure 4 This is a schematic diagram of the second circuit structure of the pole piece manufacturing control system in the embodiment of the present application;

[0044] Figure 5 This is a schematic diagram of the third circuit structure of the pole piece manufacturing control system in the embodiment of the present application;

[0045] Figure 6 This is a schematic diagram of the fourth circuit structure of the pole piece manufacturing control system in the embodiment of the present application;

[0046] Figure 7 This is a fifth circuit structure diagram of the pole piece manufacturing control system in the embodiment of the present application;

[0047] Figure 8 It is a flow chart of the pole piece manufacturing control method in the embodiment of the present application.

[0048] Reference numerals:

[0049] 10. Substrate; 110. Tab area; 120. First cutting area; 122. First cutting sub-area; 124. Second cutting sub-area; 130. Second cutting area; 132. Third cutting sub-area; 134. Fourth cutting sub-area; 20. Slurry layer; 210. First slurry layer; 220. Second slurry layer; 30. Transmission mechanism; 40. Feeding module; 410. Pipe assembly; 412. First pipeline; 414. Second pipeline; 416. Third pipeline; 420. Valve body assembly; 422. Reflux valve; 424. Proportional valve; 426. Feeding valve; 50. Control module; 60. Position detection module; 70. Detection feedback module. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0052] In addition, the term "plurality" shall mean two or more.

[0053] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] In one embodiment, Figure 1 As shown, a pole piece structure is provided, including a substrate 10 and a slurry layer 20, the substrate 10 is provided with a pole lug area 110, a first cutting area 120 and a second cutting area 130; the pole lug area 110 is located between the first cutting area 120 and the second cutting area 130; the slurry layer 20 is arranged in contact with the substrate 10, and the slurry layer 20 is divided into a first slurry layer 210 and a second slurry layer 220, the first slurry layer 210 is arranged between the first cutting area 120 and the pole lug area 110 and between the second cutting area 130 and the pole lug area 110; the second slurry layer 220 is arranged in the first cutting area 120 and the second cutting area 130, and the thickness of the first slurry layer 210 is greater than the thickness of the second slurry layer 220.

[0055] Among them, the substrate 10 can be but not limited to aluminum foil, and the substrate 10 can be in a sheet structure. Exemplarily, the substrate 10 is provided with at least one tab area 110 and at least two cutting areas, each cutting area is arranged at intervals, and one tab area 110 is arranged between two adjacent cutting areas, and one of the two adjacent cutting areas can be determined as the first cutting area 120, and the other cutting area is determined as the second cutting area 130, that is, the tab area 110 is arranged between the first cutting area 120 and the second cutting area 130. It should be noted that the position and size of the cutting area and the position and size of the tab area 110 can be pre-set based on the model of the battery product, and then the substrate 10 is divided into regions according to the pre-set position and size of the cutting area and the position and size of the tab area 110, so as to obtain the tab area 110, the first cutting area 120 and the second cutting area 130.

[0056] The slurry layer 20 refers to a coating composed of slurry. The slurry layer 20 can be attached to the substrate 10 by coating. The slurry layer 20 may include a first slurry layer 210 and a second slurry layer 220. For example, the slurry contained in the first slurry layer 210 and the slurry contained in the second slurry layer 220 are slurries of the same material. The thickness of the first slurry layer 210 is set to be greater than the thickness of the second slurry layer 220. The exemplary pipeline can output the slurry corresponding to the first thickness through the corresponding container to form the first slurry layer 210; and output the slurry corresponding to the second thickness through the corresponding container to form the second slurry layer 220. Among them, the first thickness is greater than the second thickness. It should be noted that the slurry can be a mixture of powdered active materials and binders, and the powdered active materials and binders can be stirred to form slurry through a stirring process.

[0057] A first slurry layer 210 is formed on the substrate 10 between the first cutting area 120 and the tab area 110 by applying a first thickness of slurry between the first cutting area 120 and the tab area 110; a first slurry layer 210 is formed on the substrate 10 between the second cutting area 130 and the tab area 110 by applying a second thickness of slurry between the second cutting area 130 and the tab area 110; a second slurry layer 220 is formed in the first cutting area 120 by applying a second thickness of slurry in the first cutting area 120; a second slurry layer 220 is formed in the second cutting area 130 by applying a second thickness of slurry in the second cutting area 130; thereby, a groove structure is formed in the first cutting area 120, and a groove structure is formed in the second cutting area 130, and an optimized pole piece structure is formed by cutting the first cutting area 120 and the second cutting area 130. By coating the slurry on all areas except the tab area 110, the energy density of the battery can be ensured; by reducing the slurry thickness of the first cutting area 120 and the second cutting area 130, grooves are formed in the first cutting area 120 and the second cutting area 130, and when the first cutting area 120 and the second cutting area 130 are cut, the cutting surface is smooth, avoiding the formation of burrs and large particles on the cutting surface and material falling, avoiding the formation of corresponding battery diaphragm melting holes, resulting in battery short circuit, battery low voltage or spontaneous combustion, etc.

[0058] It should be noted that the tab area 110 does not need to be coated with slurry, so that the tab area 110 forms an exposed area, so that the tab area 110 is used for welding the tab.

[0059] In the above-mentioned embodiment, a pole lug area 110, a first cutting area 120 and a second cutting area 130 are provided through a substrate 10; the pole lug area 110 is located between the first cutting area 120 and the second cutting area 130; the slurry layer 20 is arranged in contact with the substrate 10, and the slurry layer 20 is divided into a first slurry layer 210 and a second slurry layer 220, the first slurry layer 210 is arranged between the first cutting area 120 and the pole lug area 110 and between the second cutting area 130 and the pole lug area 110; the second slurry layer 220 is arranged in the first cutting area 120 and the second cutting area 130, and the thickness of the first slurry layer 210 is greater than the thickness of the second slurry layer 220, and then after cutting the first cutting area 120 and the second cutting area 130, an optimized pole piece structure can be obtained. The present application coats the second slurry layer 220 on the first cutting area 120 and the second cutting area 130, and sets the thickness of the second slurry layer 220 to be less than the thickness of the first slurry layer 210, so that the slurry thickness at the first cutting area 120 and the second cutting area 130 is thinner, thereby forming groove shapes in the first cutting area 120 and the second cutting area 130 respectively. Since the first cutting area 120 and the second cutting area 130 are coated with slurry, the energy density of the battery is guaranteed, and the first cutting area 120 and the second cutting area 130 can be uniformly stressed and the cut surface is smooth during cutting, thereby avoiding large particles and burrs at the cutting position, which may cause internal short circuit of the battery and battery combustion, thereby improving the safety and reliability of the battery.

[0060] In one embodiment, Figure 2 As shown, the substrate 10 has a first board surface and a second board surface relative to each other; the first cutting area 120 includes a first cutting sub-area 122 and a second cutting sub-area 124; the second cutting area 130 includes a third cutting sub-area 132 and a fourth cutting sub-area 134; the first cutting sub-area 122 and the third cutting sub-area 132 are respectively arranged on the first board surface, and the second cutting sub-area 124 and the fourth cutting sub-area 134 are respectively arranged on the second board surface; the first cutting sub-area 122 is arranged correspondingly to the second cutting sub-area 124, and the third cutting sub-area 132 is arranged correspondingly to the fourth cutting sub-area 134; the projection of the first cutting sub-area from the first board surface to the second board surface at least partially overlaps with the second cutting sub-area, and the projection of the third cutting sub-area from the first board surface to the second board surface at least partially overlaps with the fourth cutting sub-area.

[0061] The first plate surface of the substrate 10 is opposite to the second plate surface, and the first plate surface and the second plate surface of the substrate 10 are both the sides with the largest area. The first plate surface of the substrate 10 is provided with a first cutting sub-area 122, and the second plate surface of the substrate 10 is provided with a second cutting sub-area 124. The first cutting sub-area 122 and the second cutting sub-area 124 can be cutting sub-areas of the same size and shape. The first cutting sub-area 122 and the second cutting sub-area 124 can be completely symmetrically arranged on the substrate 10. In one example, the projection of the first cutting sub-area 122 from the first plate surface to the second plate surface at least partially overlaps with the second cutting sub-area 124.

[0062] The first board surface of the substrate 10 is provided with a third cutting sub-area 132, and the second board surface of the substrate 10 is provided with a fourth cutting sub-area 134. The third cutting sub-area 132 and the fourth cutting sub-area 134 can be cutting sub-areas with the same size and shape. The third cutting sub-area 132 and the fourth cutting sub-area 134 can be completely symmetrically arranged on the substrate 10. In one example, the projection of the third cutting sub-area 132 from the first board surface to the second board surface at least partially overlaps with the fourth cutting sub-area 134.

[0063] By arranging the first cutting sub-area 122, the third cutting sub-area 132 and the tab area 110 on the first plate surface, and the tab area 110 is located between the first cutting sub-area 122 and the third cutting sub-area 132, by coating the first cutting sub-area 122 and the third cutting sub-area 132 with the second slurry layer 220, the tab area 110 does not need to be coated with slurry, and coating the first slurry layer 210 on the substrate 10 that is not in the first cutting sub-area, the third cutting sub-area and the tab area, so that the slurry thickness in the first cutting sub-area 122 and the third cutting sub-area 132 is relatively thin, Grooves are formed in the first cutting area 120 and the second cutting area 130 respectively, which reduces loss, reduces slurry waste, and reduces costs. In addition, except for the pole ear area 110 of the first plate surface, other areas on the substrate 10 are coated with slurry, which ensures the energy density of the battery. When cutting the first cutting sub-area 122 and the third cutting sub-area 132, the force is evenly applied and the cut surface is smooth, avoiding large particles and burrs at the cutting position, which may cause internal short circuit of the battery and battery combustion, thereby improving the safety and reliability of the battery.

[0064] For another example, by setting the second cutting sub-area 124, the fourth cutting sub-area 134 and the tab area 110 on the second plate surface, and the tab area 110 is located between the second cutting sub-area 124 and the fourth cutting sub-area 134, by coating the second slurry layer 220 on the second cutting sub-area 124 and the fourth cutting sub-area 134, the tab area 110 does not need to be coated with slurry, and the first slurry layer 210 is coated on the substrate 10 that is not in the second cutting sub-area, the fourth cutting sub-area and the tab area, so that the slurry thickness at the second cutting sub-area 124 and the fourth cutting sub-area 134 is relatively thick. The second cutting area 130 and the fourth cutting area 134 are thin, and groove shapes are formed in the second cutting area 130 and the fourth cutting area respectively, which reduces the loss, reduces the waste of slurry, and reduces the cost. In addition, except for the pole ear area 110 of the second plate surface, other areas on the substrate 10 are coated with slurry, which ensures the energy density of the battery. When cutting the second cutting sub-area 124 and the fourth cutting sub-area 134, the force can be uniform and the cut surface is smooth, avoiding large particles and burrs at the cutting position, which may cause internal short circuit of the battery and cause battery combustion, thereby improving the safety and reliability of the battery.

[0065] In one embodiment, the width of the first cutting area 120 is less than or equal to the width of the tab area 110 , and the width of the second cutting area 130 is less than or equal to the width of the tab area 110 .

[0066] By setting the width of the first cutting area 120 and the second cutting area 130 , the first cutting area 120 and the second cutting area 130 can meet the coating operation of the second slurry layer 220 , and at the same time can reduce the loss of the pole piece, reduce the waste of the pole piece material, and reduce the cost.

[0067] In one embodiment, the second slurry layer 220 is disposed in the first cutting sub-region 122 and the second slurry layer 220 is disposed in the third cutting sub-region 132 ; and / or the second slurry layer 220 is disposed in the second cutting sub-region 124 and the second slurry layer 220 is disposed in the fourth cutting sub-region 134 .

[0068] For example, on the first board surface of the substrate 10, the second slurry layer 220 is set only in the first cutting sub-area 122 and the third cutting sub-area 132; on the second board surface of the substrate 10, except for the area before the pole ear area 110, the remaining areas (such as the second cutting sub-area 124 and the fourth cutting sub-area 134) are all provided with the first slurry layer 210, thereby forming a single-sided slurry groove shape on the substrate 10, simplifying the process steps of coating the slurry, ensuring the energy density of the battery, and the first cutting sub-area 122 and the third cutting sub-area 132 can be cut evenly, and the cut surface is smooth, avoiding large particles and burrs at the cutting position, which may cause internal short circuit of the battery and battery combustion, thereby improving the safety and reliability of the battery.

[0069] For another example, on the first board surface of the substrate 10, except for the area before the tab area 110, the remaining areas (such as the first cutting sub-area 122 and the third cutting sub-area 132) are all provided with a first slurry layer 210; on the second board surface of the substrate 10, only the second cutting sub-area 124 and the fourth cutting sub-area 134 are provided with a second slurry layer 220, thereby forming a single-sided slurry groove shape on the substrate 10, simplifying the process steps of coating the slurry, ensuring the energy density of the battery, and enabling the second cutting sub-area 124 and the fourth cutting sub-area 134 to be cut with uniform force and a smooth cut surface, thereby avoiding large particles falling off and burrs at the cutting position, which may cause internal short circuits in the battery and battery combustion, thereby improving the safety and reliability of the battery.

[0070] For example, Figure 1 and Figure 2 As shown, on the first board surface of the substrate 10, a second slurry layer 220 is set for the first cutting sub-area 122 and the third cutting sub-area 132; on the second board surface of the substrate 10, a second slurry layer 220 is set for the second cutting sub-area 124 and the fourth cutting sub-area 134, thereby forming a double-sided slurry groove shape on the substrate 10, so that the corresponding cutting sub-areas can be evenly stressed during cutting, further improving the flatness of the cut surface, avoiding large particles and burrs at the cutting position, which may cause internal short circuits in the battery and cause battery combustion, thereby improving the safety and reliability of the battery.

[0071] In one embodiment, the tab region 110 is located between one third and one third to two thirds of the total length from the first cutting region 120 to the second cutting region 130 .

[0072] By setting the pole ear area 110 between one third and one third to two thirds of the total length from the first cutting area 120 to the second cutting area 130, that is, the cutting position can be set between one third and one third to two thirds of the total length of the two adjacent pole ear areas 110, thereby broadening the selectivity of the position setting of the cutting position and achieving the custom setting of the cutting position according to the set range.

[0073] Illustratively, a plurality of cutting regions and a plurality of tab regions 110 may be provided on the substrate 10, and there is one tab region 110 between two adjacent cutting regions, that is, there is one cutting region between two adjacent tab regions 110, and each pole piece structure is obtained by cutting the corresponding cutting regions.

[0074] In one embodiment, Figure 1 and Figure 3As shown, a pole piece manufacturing control system is also provided for manufacturing a pole piece structure as any one of the above items, and the pole piece manufacturing control system includes a transmission mechanism 30, a feeding module 40 and a control module 50, the transmission mechanism 30 is used to support the substrate 10; the substrate 10 is provided with a pole ear area 110, a first cutting area 120 and a second cutting area 130 according to the preset pole piece coating data; the feeding module 40 is used to transmit the slurry; the control module 50 connects the transmission mechanism 30 and the feeding module 40; the control module 50 is configured to obtain the preset pole piece coating data, and according to the preset pole piece coating data, control the transmission mechanism 30 to drive the pole piece based on the preset rate The substrate 10 moves; the control module 50 is also configured to control the feeding module 40 to apply a first thickness of slurry between the first cutting area 120 and the pole lug area 110 and between the second cutting area 130 and the pole lug area 110 according to a preset rate and preset pole piece coating data, so as to form a first slurry layer 210 between the first cutting area 120 and the pole lug area 110 and between the second cutting area 130 and the pole lug area 110, and to apply a second thickness of slurry to the first cutting area 120 and the second cutting area 130, so as to form a second slurry layer 220 in the first cutting area 120 and the second cutting area 130; the first thickness is greater than the second thickness.

[0075] Among them, the transmission mechanism 30 can be used to support the substrate 10, and the transmission mechanism 30 can also be used to drive the substrate 10 to move. Exemplarily, the transmission mechanism 30 includes a support table, and a reference roller is arranged on the support table, and the substrate 10 is driven to move by the rotation of the reference roller. The preset electrode coating data includes but is not limited to the position and size of the cutting area and the position and size of the pole ear area 110. The first cutting area 120 and the second cutting area 130 are arranged on the substrate 10 at intervals, and the pole ear area 110 is arranged between the first cutting area 120 and the second cutting area 130.

[0076] The feeding module 40 can be used to transfer the slurry so as to coat the slurry on the corresponding position of the substrate 10. For example, the feeding module 40 may include a first container and a pump body, wherein the first container is connected to the pump body, the first container is used to store the slurry, and the pump body is used to drive the slurry to be transferred to the corresponding position on the substrate 10 so as to coat the corresponding position on the substrate 10.

[0077] For example, the operator can input preset electrode coating data according to the model of the corresponding battery. Based on the control module 50 being electrically connected to the transmission mechanism 30, the control module 50 obtains the preset electrode coating data, generates a first control signal according to the preset electrode coating data, and transmits the first control signal to the transmission mechanism 30, and the transmission mechanism 30 drives the substrate 10 to move at a preset rate according to the first control signal.

[0078] Based on the control module 50 being electrically connected to the feeding module 40, the control module 50 obtains the preset rate and the preset electrode coating data, and controls the feeding module 40 to output the slurry according to the preset rate and the preset electrode coating data. Specifically, the control module 50 controls the feeding module 40 to coat the first cutting area 120 with the slurry of the second thickness, thereby forming a second slurry layer 220 in the first cutting area 120; the control module 50 controls the feeding module 40 to coat the first thickness of slurry between the first cutting area 120 and the pole lug area 110, thereby forming a first slurry layer 210 between the first cutting area 120 and the pole lug area 110; the control module 50 controls the feeding module 40 to be closed, thereby forming a non-coating layer in the pole lug area 110; the control module 50 controls the feeding module 40 to coat the first thickness of slurry between the second cutting area 130 and the pole lug area 110, thereby forming a first slurry layer 210 between the second cutting area 130 and the pole lug area 110; the control module 50 controls the feeding module 40 to be closed, thereby forming a non-coating layer in the pole lug area 110; the control module 50 controls the feeding module 40 to coat the first thickness of slurry between the second cutting area 130 and the pole lug area 110, thereby forming a first slurry layer 210 between the second cutting area 130 and the pole lug area 110; the control The module 50 controls the feeding module 40 to apply a second thickness of slurry to the second cutting area 130, thereby forming a second slurry layer 220 in the second cutting area 130; based on the first thickness being set greater than the second thickness, the slurry thickness at the first cutting area 120 and the second cutting area 130 is thinner, so that the first cutting area 120 and the second cutting area 130 form a groove shape. Since the first cutting area 120 and the second cutting area 130 are coated with slurry, the energy density of the battery is guaranteed, and the first cutting area 120 and the second cutting area 130 can be evenly stressed during cutting, and the cut surface is smooth, thereby avoiding large particles and burrs at the cutting position, which may cause internal short circuits in the battery and cause battery combustion, thereby improving the safety and reliability of the battery.

[0079] In one embodiment, the control module 50 is also configured to control the feeding module 40 to output slurry based on a first flow rate when the output end of the feeding module 40 corresponds to the first cutting area 120; control the feeding module 40 to output slurry based on a second flow rate when the output end of the feeding module 40 corresponds to between the first cutting area 120 and the tab area 110; control the feeding module 40 to close when the output end of the feeding module 40 corresponds to the tab area 110; control the feeding module 40 to output slurry based on the second flow rate when the output end of the feeding module 40 corresponds to between the second cutting area 130 and the tab area 110; control the feeding module 40 to output slurry based on the first flow rate when the output end of the feeding module 40 corresponds to the second cutting area 130; and control the feeding module 40 to output slurry based on the first flow rate; the first flow rate is less than the second flow rate.

[0080] For example, the feeding module 40 may be disposed above the transmission mechanism 30 , and the output end of the feeding module 40 faces the substrate 10 on the transmission mechanism 30 . The substrate 10 moves with the drive of the transmission mechanism 30. When it is detected that the output end of the feeding module 40 corresponds to the first cutting area 120, the control module 50 controls the feeding module 40 to output the slurry to the first cutting area 120 based on the first flow rate, thereby forming a second slurry layer 220 in the first cutting area 120; when it is detected that the output end of the feeding module 40 corresponds to between the first cutting area 120 and the pole lug area 110, the feeding module 40 is controlled to output the slurry to between the first cutting area 120 and the pole lug area 110 based on the second flow rate, thereby forming a first slurry layer 210 between the first cutting area 120 and the pole lug area 110; when it is detected that the output end of the feeding module 40 corresponds to the pole lug area 110, the control module 50 controls the feeding module 40 to be closed, thereby forming a non-coating layer in the pole lug area 110; when it is detected that the output end of the feeding module 40 corresponds to between the second cutting area 130 and the pole lug area 110, the control module 50 controls the feeding module 40 to output the slurry to the second cutting area 130 and the pole lug area 110. The slurry is output between the area 130 and the lug area 110 based on the second flow rate, and then a first slurry layer 210 is formed between the second cutting area 130 and the lug area 110; when it is detected that the output end of the feeding module 40 corresponds to the second cutting area 130, the control module 50 controls the feeding module 40 to output the slurry to the second cutting area 130 based on the first flow rate; and then a second slurry layer 220 is formed in the second cutting area 130; based on the first flow rate being set to be less than the second flow rate, the thickness of the second slurry layer 220 is less than the thickness of the first slurry layer 210, that is, the slurry thickness at the first cutting area 120 and the second cutting area 130 is thinner, so that the first cutting area 120 and the second cutting area 130 form a groove shape, and the first cutting area 120 and the second cutting area 130 can be uniformly stressed when cutting, and the cut surface is smooth, avoiding large particles and burrs at the cutting position, which may cause internal short circuit of the battery and battery combustion, thereby improving the safety and reliability of the battery.

[0081] In one embodiment, Figure 4 As shown, the pole piece manufacturing control system also includes a position detection module 60, which is connected to the control module 50; the position detection module 60 is configured to detect the moving distance data of the substrate 10 and transmit the moving distance data to the control module 50; the control module 50 is also configured to control the opening and closing of the feeding module 40 and the slurry output flow rate according to the moving distance data.

[0082] The position detection module 60 may be used to detect the moving distance data of the substrate 10 . For example, the position detection module 60 may include a displacement sensor.

[0083] Based on the control module 50 connected to the position detection module 60, when the transmission mechanism 30 drives the substrate 10 to move, the position detection module 60 detects the moving distance of the substrate 10, obtains the corresponding moving distance data, and transmits the moving distance data to the control module 50, and then the control module 50 controls the working state of the feeding module 40 according to the moving distance data. For example, according to the moving distance data, when it is determined that the substrate 10 moves to the first cutting area 120 or the output end of the feeding module 40 corresponding to the first cutting area 120, the feeding module 40 is controlled to start, and the feeding module 40 is controlled to output the slurry based on the first flow rate to form the second slurry layer 220 in the first cutting area 120 or the second cutting area 130. For another example, according to the moving distance data, when it is determined that the substrate 10 moves to the output end of the feeding module 40 corresponding to the tab area 110, the feeding module 40 is controlled to be closed to form a non-coating layer in the tab area 110. The position detection module 60 detects the moving distance of the substrate 10 in real time, and then accurately controls the output size of the slurry according to the movement of the substrate 10, so as to accurately form the first slurry layer 210 and the second slurry layer 220 at the corresponding positions of the substrate 10, thereby improving the accuracy of slurry coating.

[0084] In one embodiment, Figure 5 As shown, the feeding module 40 includes a pipeline assembly 410 and a valve body assembly 420; the valve body assembly 420 is arranged on the pipeline assembly 410; the valve body assembly 420 is connected to the control module 50; the control module 50 is also configured to control the opening and closing and valve opening degree of the valve body assembly 420 according to the moving distance data.

[0085] The pipeline assembly 410 may be composed of a plurality of pipelines, the valve body assembly 420 may be composed of a plurality of valve bodies, and the valve body may be a solenoid valve. The valve body assembly 420 is disposed on the pipeline assembly 410, and the valve body assembly 420 is connected to the pipeline assembly 410 in an open state.

[0086] For example, based on the control module 50 connected to the valve body assembly 420, the control module 50 determines that the substrate 10 moves to the first cutting area 120 or the output end of the pipeline assembly 410 corresponding to the first cutting area 120 according to the moving distance data, and the control valve body assembly 420 is started, and the control valve body assembly 420 is opened based on the first preset opening, and then the pipeline assembly 410 outputs the slurry based on the first flow rate to form the second slurry layer 220 in the first cutting area 120 or the second cutting area 130. When the control module 50 determines that the substrate 10 moves to the output end of the pipeline assembly 410 corresponding to the tab area 110 according to the moving distance data, the control valve body assembly 420 is closed to form a non-coating layer in the tab area 110. When the control module 50 determines that the substrate 10 moves to the output end of the corresponding pipeline assembly 410 between the first cutting area 120 and the tab area 110 or between the second cutting area 130 and the tab area 110 according to the moving distance data, the control valve body assembly 420 is started, and the control valve body assembly 420 is opened based on the second preset opening, and then the pipeline assembly 410 outputs the slurry based on the second flow rate to form the first slurry layer 210 between the first cutting area 120 and the tab area 110 or between the second cutting area 130 and the tab area 110. The moving distance of the substrate 10 is detected in real time by the position detection module 60, and then according to the movement of the substrate 10, the opening and closing and the valve opening degree of the control valve body assembly 420 are controlled to achieve precise control of the output of the slurry, thereby achieving precise formation of the first slurry layer 210 and the second slurry layer 220 at the corresponding position of the substrate 10, thereby improving the accuracy of slurry coating. In addition, groove shapes are formed in the first cutting area 120 and the second cutting area 130 respectively, so that the first cutting area 120 and the second cutting area 130 can be evenly stressed during cutting, and the cut surface is smooth, thereby avoiding large particles and burrs at the cutting position, which may cause internal short circuits in the battery and battery combustion, thereby improving the safety and reliability of the battery.

[0087] In one embodiment, Figure 6 As shown, the valve body assembly 420 includes a return valve 422, a proportional valve 424 and a supply valve 426; the pipeline assembly 410 includes a first pipeline 412, a second pipeline 414 and a third pipeline 416; the return valve 422, the proportional valve 424 and the supply valve 426 are respectively connected to the control module 50; the first port of the proportional valve 424 is connected to the first port of the supply valve 426 through the first pipeline 412, and the second port of the proportional valve 424 is connected to the first port of the return valve 422 through the second pipeline 414; the second port of the return valve 422 is used to input slurry, the third port of the return valve 422 is used to reflux slurry through the third pipeline 416, and the second port of the supply valve 426 is used to output slurry.

[0088] The reflux valve 422 is used to reflux the slurry in the pipeline assembly 410 to the first container. The proportional valve 424 can be used to control the flow rate of the slurry output. The feed valve 426 can be used to control the output of the slurry or stop the output.

[0089] Exemplarily, the reflux valve 422 is provided with a first magnetic rod and a first valve core. When the first magnetic rod moves downward, the first magnetic rod closes the reflux port of the first valve core, so that the reflux is closed; when the first magnetic rod moves upward, the first magnetic rod is separated from the reflux port of the first valve core, so that the reflux is opened. The proportional valve 424 is provided with a rotating member and a second valve core. According to the rotation angle of the rotating member, the opening of the second valve core is closed to adjust the opening degree of the proportional valve 424. The feed valve 426 is provided with a third magnetic rod and a third valve core. When the third magnetic rod moves downward, the third magnetic rod closes the output port of the third valve core, so that the output is closed; when the third magnetic rod moves upward, the third magnetic rod is separated from the output port of the third valve core, so that the output is opened.

[0090] In one embodiment, the control module 50 is further configured to control the reflux closure of the reflux valve 422 and the opening of the supply valve 426 when the second port of the supply valve 426 corresponds to the first cutting area 120, and control the proportional valve 424 to open based on the first preset opening to form a second slurry layer 220 of a second thickness in the first cutting area 120; when the second port of the supply valve 426 corresponds to between the first cutting area 120 and the pole ear area 110, control the reflux closure of the reflux valve 422 and the opening of the supply valve 426, and control the proportional valve 424 to open based on the second preset opening to form a first slurry layer 210 of a first thickness between the first cutting area 120 and the pole ear area 110; when the second port of the supply valve 426 corresponds to the pole ear area 110, control the proportional valve 424 to open based on the second preset opening to form a first slurry layer 210 of a first thickness between the first cutting area 120 and the pole ear area 110. Valve 424 is closed and supply valve 426 is closed, and the reflux valve 422 is controlled to open to form an exposed area in the tab area 110; when the second port of the supply valve 426 corresponds to between the second cutting area 130 and the tab area 110, the reflux valve 422 is controlled to be closed and the supply valve 426 is opened, and the proportional valve 424 is controlled to be opened based on the second preset opening to form a first slurry layer 210 of a first thickness between the second cutting area 130 and the tab area 110; when the second port of the supply valve 426 corresponds to the second cutting area 130, the reflux valve 422 is controlled to be closed and the supply valve 426 is opened, and the proportional valve 424 is controlled to be opened based on the first preset opening to form a second slurry layer 220 of a second thickness in the second cutting area 130.

[0091] Exemplarily, the return valve 422 is provided with a first valve core motor, the proportional valve 424 is provided with a second valve core motor, and the feed valve 426 is provided with a third valve core motor. The first valve core motor is used to control the up and down movement of the first magnetic rod, the second valve core motor is used to control the rotation angle of the rotating part, and the third valve core motor is used to control the up and down movement of the third magnetic rod.

[0092] Based on the control module 50 respectively connecting the first valve core motor, the second valve core motor and the third valve core motor, when the second port of the supply valve 426 corresponds to the first cutting area 120, the control module 50 controls the first valve core motor to start, and the first valve core motor drives the first magnetic rod to move downward, so that the reflux of the reflux valve 422 is closed; controls the third valve core motor to start, and the third valve core motor drives the third magnetic rod to move upward, so that the supply valve 426 is opened; and controls the second valve core motor to start, and the second valve core motor drives the rotating part to rotate a corresponding angle, so that the proportional valve 424 is opened based on the first preset opening, and then the second port of the supply valve 426 outputs slurry to the first cutting area 120, so that a second slurry layer 220 of a second thickness is formed in the first cutting area 120.

[0093] When the second port of the supply valve 426 corresponds to between the first cutting area 120 and the tab area 110, the control module 50 controls the first valve core motor to start, and the first valve core motor drives the first magnetic rod to move downward, so that the reflux of the reflux valve 422 is closed; controls the third valve core motor to start, and the third valve core motor drives the third magnetic rod to move upward, so that the supply valve 426 is opened; and controls the second valve core motor to start, and the second valve core motor drives the rotating part to rotate a corresponding angle, so that the proportional valve 424 is opened based on the second preset opening, and then the second port of the supply valve 426 outputs slurry to between the first cutting area 120 and the tab area 110, so that a first slurry layer 210 of a first thickness is formed between the first cutting area 120 and the tab area 110.

[0094] When the second port of the supply valve 426 corresponds to the pole ear area 110, the control module 50 controls the third valve core motor to start, and the third valve core motor drives the third magnetic rod to move downward, so that the supply valve 426 is closed; controls the second valve core motor to start, and the second valve core motor drives the rotating part to close the valve core, so that the proportional valve 424 is closed; controls the first valve core motor to start, and the first valve core motor drives the first magnetic rod to move upward, so that the reflux of the reflux valve 422 is opened, and then the second port of the supply valve 426 stops outputting slurry, that is, there is no slurry layer 20 in the pole ear area 110, so that an exposed area is formed in the pole ear area 110.

[0095] When the second port of the supply valve 426 corresponds to between the second cutting area 130 and the tab area 110, the control module 50 controls the first valve core motor to start, and the first valve core motor drives the first magnetic rod to move downward, so that the reflux of the reflux valve 422 is closed; controls the third valve core motor to start, and the third valve core motor drives the third magnetic rod to move upward, so that the supply valve 426 is opened; and controls the second valve core motor to start, and the second valve core motor drives the rotating part to rotate a corresponding angle, so that the proportional valve 424 is opened based on the second preset opening, and then the second port of the supply valve 426 outputs slurry to between the second cutting area 130 and the tab area 110, so that a first slurry layer 210 of a first thickness is formed between the second cutting area 130 and the tab area 110.

[0096] When the second port of the feed valve 426 corresponds to the second cutting area 130, the control module 50 controls the first valve core motor to start, and the first valve core motor drives the first magnetic rod to move downward, so that the return flow of the return valve 422 is closed; controls the third valve core motor to start, and the third valve core motor drives the third magnetic rod to move upward, so that the feed valve 426 is opened; and controls the second valve core motor to start, and the second valve core motor drives the rotating member to rotate a corresponding angle, so that the proportional valve 424 is opened based on the first preset opening, and then the second port of the feed valve 426 is turned to The second cutting area 130 outputs slurry, so that a second slurry layer 220 of a second thickness is formed in the second cutting area 130, thereby obtaining the first cutting area 120 and the second cutting area 130 with a groove shape, reducing slurry loss, reducing costs, ensuring the energy density of the battery, and evenly applying force when cutting the first cutting area 120 and the second cutting area 130, with a smooth cut surface, avoiding large particles falling off and burrs at the cutting position, which may cause internal short circuits in the battery and cause battery combustion, thereby improving the safety and reliability of the battery.

[0097] In one example, the control module 50 may include a parameter setting unit, a communication control unit, a dimension calculation unit, and a valve body execution unit. The parameter setting unit is used to set parameters such as the position and size of the pole ear area 110, the position and size of the cutting area, and the size of the overall coating length according to the battery product model. The communication control unit is used to transmit signals for the set parameters to accurately give data and ensure the accuracy of the parameters. Dimension calculation unit: accurately measure the rotational dimension through the rotational position of the transmission mechanism 30 to obtain the rotational dimension data. Valve core execution module: according to the rotational dimension data and the set parameters, control the corresponding magnetic rod to move up and down and the rotating part to rotate, execute the corresponding signal action, complete the slurry coating on the substrate 10, and obtain a pole piece structure with a groove shape at the cutting position.

[0098] In one embodiment, Figure 7As shown, the pole piece manufacturing control system also includes a detection feedback module 70, which is connected to the control module 50; the detection feedback module 70 is used to perform dimensional detection on the coated pole piece structure, obtain dimensional data, and transmit the dimensional data to the control module 50; the control module 50 determines the qualified rate of the coated pole piece structure based on the dimensional data.

[0099] Among them, the detection feedback module 70 can be used to perform online measurement of the dimensions of the coated and formed pole piece structure to obtain corresponding dimensional data. The control module 50 can obtain the corresponding dimensional data and compare the dimensional data with a preset threshold value. Based on the comparison result, it is determined whether the corresponding pole piece structure meets the requirements, and then the qualified rate of the corresponding pole piece structure can be obtained. In addition, real-time feedback adjustment can be performed based on the processing results.

[0100] In one embodiment, Figure 8 As shown, a pole piece manufacturing control method is also provided, which is applied to any pole piece manufacturing control system as described above, and the pole piece manufacturing control method comprises the following steps:

[0101] Step S810, obtaining preset pole piece coating data, and according to the preset pole piece coating data, controlling the transmission mechanism to drive the substrate to move at a preset speed; the substrate is provided with a pole ear area, a first cutting area and a second cutting area according to the preset pole piece coating data.

[0102] Step S820, according to a preset rate and preset electrode coating data, control the feeding module to coat a first thickness of slurry between the first cutting area and the pole lug area and between the second cutting area and the pole lug area to form a first slurry layer between the first cutting area and the pole lug area and between the second cutting area and the pole lug area, and coat the first cutting area and the second cutting area with a second thickness of slurry to form a second slurry layer in the first cutting area and the second cutting area; the first thickness is greater than the second thickness.

[0103] Specifically, a first slurry layer is formed on the substrate between the first cutting area and the tab area by applying a first thickness of slurry between the first cutting area and the tab area; a first slurry layer is formed on the substrate between the second cutting area and the tab area by applying a second thickness of slurry between the second cutting area and the tab area; a second slurry layer is formed in the first cutting area by applying a second thickness of slurry in the first cutting area; a second slurry layer is formed in the second cutting area by applying a second thickness of slurry in the second cutting area; thereby, a groove structure is formed in the first cutting area, and a groove structure is formed in the second cutting area, and an optimized pole piece structure is formed by cutting the first cutting area and the second cutting area. By coating the slurry on all areas except the lug area, the energy density of the battery can be ensured; by reducing the slurry thickness in the first cutting area and the second cutting area, grooves are formed in the first cutting area and the second cutting area. When the first cutting area and the second cutting area are cut, the cutting surface is smooth, avoiding the formation of burrs and large particles on the cutting surface and material falling, avoiding the formation of corresponding battery diaphragm melt holes, resulting in battery short circuit, battery low voltage or spontaneous combustion, etc., thereby improving the safety and reliability of the battery.

[0104] It should be understood that although Figure 7 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 8 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0105] In one embodiment, a battery cell is also provided, comprising a pole piece structure as described above.

[0106] For the specific description of the pole piece structure, reference may be made to the specific description of the pole piece structure in the above embodiment, which will not be repeated here.

[0107] The battery cell may be a lithium-ion battery cell, and the battery cell may be in a cylindrical structure. The battery cell includes a pole piece structure, and the pole piece structure includes a substrate and a slurry layer. The substrate is provided with a pole ear area, a first cutting area, and a second cutting area; the pole ear area is located between the first cutting area and the second cutting area; the slurry layer is divided into a first slurry layer and a second slurry layer, and the first slurry layer is arranged between the first cutting area and the pole ear area and between the second cutting area and the pole ear area; the second slurry layer is arranged in the first cutting area and the second cutting area, and the thickness of the first slurry layer is greater than the thickness of the second slurry layer, and then after cutting the first cutting area and the second cutting area, an optimized pole piece structure can be obtained.

[0108] In the above embodiment, by coating the second slurry layer in the first cutting area and the second cutting area, and setting the thickness of the second slurry layer to be less than the thickness of the first slurry layer, the slurry thickness in the first cutting area and the second cutting area is thinner, and then groove shapes are formed in the first cutting area and the second cutting area respectively. Since the first cutting area and the second cutting area are coated with slurry, the energy density of the battery is guaranteed, and the first cutting area and the second cutting area can be uniformly stressed and the cut surface is smooth during cutting, thereby avoiding large particles and burrs at the cutting position, which may cause internal short circuit of the battery and battery combustion, thereby improving the safety and reliability of the battery.

[0109] In one embodiment, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of any one of the above-mentioned pole piece manufacturing control methods are implemented.

[0110] For example, when the computer program is executed by the processor, the following steps of the pole piece manufacturing control method are implemented:

[0111] Acquire preset pole piece coating data, and control the transmission mechanism to move the substrate based on a preset speed according to the preset pole piece coating data; the substrate is provided with a pole lug area, a first cutting area and a second cutting area according to the preset pole piece coating data; according to the preset speed and the preset pole piece coating data, control the feeding module to coat a first thickness of slurry between the first cutting area and the pole lug area and between the second cutting area and the pole lug area to form a first slurry layer between the first cutting area and the pole lug area and between the second cutting area and the pole lug area, and coat the first cutting area and the second cutting area with a second thickness of slurry to form a second slurry layer in the first cutting area and the second cutting area; the first thickness is greater than the second thickness.

[0112] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing related hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned division operation methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0113] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0114] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A pole piece structure, characterized in that: include: A substrate, wherein the substrate is provided with a tab region, a first cutting region, and a second cutting region; the tab region is located between the first cutting region and the second cutting region; A slurry layer is arranged in contact with the substrate, and the slurry layer is divided into a first slurry layer and a second slurry layer, the first slurry layer is arranged between the first cutting area and the tab area and between the second cutting area and the tab area; the second slurry layer is arranged in the first cutting area and the second cutting area, and the thickness of the first slurry layer is greater than the thickness of the second slurry layer.

2. The pole piece structure according to claim 1, characterized in that: The substrate has a first plate surface and a second plate surface opposite to each other; the first cutting area includes a first cutting sub-area and a second cutting sub-area; the second cutting area includes a third cutting sub-area and a fourth cutting sub-area; The first cutting sub-area and the third cutting sub-area are respectively arranged on the first board surface, and the second cutting sub-area and the fourth cutting sub-area are respectively arranged on the second board surface; the first cutting sub-area is arranged correspondingly to the second cutting sub-area, and the third cutting sub-area is arranged correspondingly to the fourth cutting sub-area; The projection of the first cutting sub-area from the first board surface to the second board surface at least partially overlaps with the second cutting sub-area, and the projection of the third cutting sub-area from the first board surface to the second board surface at least partially overlaps with the fourth cutting sub-area.

3. The pole piece structure according to claim 1, characterized in that: The width of the first cutting area is smaller than or equal to the width of the tab area, and the width of the second cutting area is smaller than or equal to the width of the tab area.

4. The pole piece structure according to any one of claims 1 to 3, characterized in that: The tab area is located between one third and one third to two thirds of the total length from the first cutting area to the second cutting area.

5. A pole piece manufacturing control system, characterized in that: Used to manufacture the pole piece structure according to any one of claims 1 to 4, the pole piece manufacturing control system comprises: A transmission mechanism, the transmission mechanism is used to support the substrate; the substrate is provided with a tab area, a first cutting area and a second cutting area according to preset electrode coating data; A feeding module, wherein the feeding module is used to transfer slurry; A control module, the control module is connected to the transmission mechanism and the feeding module; the control module is configured to obtain the preset electrode coating data, and control the transmission mechanism to drive the substrate to move based on a preset speed according to the preset electrode coating data; The control module is also configured to control the feeding module to apply the slurry of a first thickness between the first cutting area and the pole lug area and between the second cutting area and the pole lug area according to the preset rate and the preset pole piece coating data, so as to form a first slurry layer between the first cutting area and the pole lug area and between the second cutting area and the pole lug area, and to apply the slurry of a second thickness to the first cutting area and the second cutting area, so as to form a second slurry layer in the first cutting area and the second cutting area; the first thickness is greater than the second thickness.

6. The pole piece manufacturing control system according to claim 5, characterized in that: The control module is also configured to control the feeding module to output the slurry based on a first flow rate when the output end of the feeding module corresponds to the first cutting area; control the feeding module to output the slurry based on a second flow rate when the output end of the feeding module corresponds to between the first cutting area and the tab area; control the feeding module to be closed when the output end of the feeding module corresponds to the tab area; control the feeding module to output the slurry based on a second flow rate when the output end of the feeding module corresponds to between the second cutting area and the tab area; control the feeding module to output the slurry based on the first flow rate when the output end of the feeding module corresponds to the second cutting area; the first flow rate is less than the second flow rate.

7. The pole piece manufacturing control system according to claim 5, characterized in that: It also includes a position detection module, which is connected to the control module; The position detection module is configured to detect the moving distance data of the substrate and transmit the moving distance data to the control module; The control module is also configured to control the opening and closing of the feeding module and the slurry output flow rate according to the movement distance data.

8. The pole piece manufacturing control system according to claim 7, characterized in that: The feed module comprises a pipeline assembly and a valve body assembly; the valve body assembly is arranged on the pipeline assembly; The valve body assembly is connected to the control module; the control module is also configured to control the opening and closing and valve opening degree of the valve body assembly according to the movement distance data.

9. The pole piece manufacturing control system according to claim 8, characterized in that: The valve body assembly includes a reflux valve, a proportional valve and a feed valve; the pipeline assembly includes a first pipeline, a second pipeline and a third pipeline; the reflux valve, the proportional valve and the feed valve are respectively connected to the control module; The first port of the proportional valve is connected to the first port of the feed valve through the first pipeline, and the second port of the proportional valve is connected to the first port of the return valve through the second pipeline; The second port of the reflux valve is used to input the slurry, the third port of the reflux valve is used to reflux the slurry through the third pipeline, and the second port of the supply valve is used to output the slurry.

10. The pole piece manufacturing control system according to claim 9, characterized in that: The control module is further configured to control the reflux of the reflux valve to be closed and the supply valve to be opened when the second port of the supply valve corresponds to the first cutting area, and control the proportional valve to be opened based on a first preset opening, so as to form a second slurry layer of a second thickness in the first cutting area; When the second port of the supply valve corresponds to between the first cutting area and the tab area, the reflux of the reflux valve is controlled to be closed and the supply valve is controlled to be opened, and the proportional valve is controlled to be opened based on a second preset opening, so as to form a first slurry layer of a first thickness between the first cutting area and the tab area; When the second port of the supply valve corresponds to the electrode lug area, the proportional valve and the supply valve are controlled to be closed, and the reflux valve is controlled to be opened to form an exposed area in the electrode lug area; When the second port of the supply valve corresponds to between the second cutting area and the tab area, the reflux of the reflux valve is controlled to be closed and the supply valve is controlled to be opened, and the proportional valve is controlled to be opened based on a second preset opening, so as to form a first slurry layer of a first thickness between the second cutting area and the tab area; When the second port of the supply valve corresponds to the second cutting area, the reflux valve is controlled to be closed and the supply valve is controlled to be opened, and the proportional valve is controlled to be opened based on a first preset opening to form a second slurry layer of a second thickness in the second cutting area.

11. The pole piece manufacturing control system according to any one of claims 5 to 10, characterized in that: It also includes a detection feedback module, which is connected to the control module; The detection feedback module is used to perform dimensional detection on the coated pole piece structure to obtain dimensional data, and transmit the dimensional data to the control module; the control module determines the qualified rate of the coated pole piece structure according to the dimensional data.

12. A pole piece manufacturing control method, characterized in that: Applied to the pole piece manufacturing control system according to any one of claims 5 to 11, the pole piece manufacturing control method comprises the following steps: Acquire preset pole piece coating data, and control the transmission mechanism to drive the substrate to move based on a preset speed according to the preset pole piece coating data; the substrate is provided with a pole ear area, a first cutting area and a second cutting area according to the preset pole piece coating data; According to the preset rate and the preset pole piece coating data, the feeding module is controlled to coat the slurry of the first thickness between the first cutting area and the pole lug area and between the second cutting area and the pole lug area to form a first slurry layer between the first cutting area and the pole lug area and between the second cutting area and the pole lug area, and the slurry of the second thickness is coated on the first cutting area and the second cutting area to form a second slurry layer in the first cutting area and the second cutting area; the first thickness is greater than the second thickness.

13. A battery cell, characterized in that: Comprising a pole piece structure as described in any one of claims 1 to 4.

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