Push pin mechanism, winding equipment and battery production system

Abstract

The embodiment of the utility model provides a push pin mechanism, winding equipment and a battery production system, and belongs to the technical field of processing equipment. The needle pushing mechanism is applied to the winding equipment and comprises a needle pushing shaft, a needle pushing rod and a needle pushing rod, and the needle pushing shaft is provided with a connecting end used for being connected with a winding needle and an air channel used for being communicated with a negative pressure cavity of the winding needle; and the push pin driving mechanism is used for driving the push pin shaft to move and is provided with a connecting structure used for being connected with a main shaft of the winding equipment. According to the needle pushing mechanism, the air channel communicated with the winding needle negative pressure cavity is formed in the needle pushing shaft, the needle pushing mechanism can be suitable for a common winding needle and a vacuum winding needle at the same time, the application range of the needle pushing mechanism is expanded, and meanwhile the needle pushing driving mechanism is integrated on the main shaft of the winding equipment; the push needle driving mechanism can be simplified, and the space occupied by the push needle driving mechanism can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of processing equipment, and more specifically, to a push-pin mechanism, a winding device and a battery production system. Background Art

[0002] In the related art, when the winding equipment uses a winding needle to wind the battery cell, it is necessary to drive the winding needle to move linearly along the axial direction through a pushing needle mechanism to achieve the pulling and pushing of the winding needle. However, the current pushing needle mechanism can adapt to a small number of winding needle types. Some winding needle types that cannot be adapted need to achieve the pulling or pushing structure through other methods or structures, resulting in an increase in the number of parts of the winding equipment and a higher production cost. Utility Model Content

[0003] The present application provides a push-pin mechanism, a winding device and a battery production system, so that the push-pin mechanism is applicable to both ordinary winding needles and vacuum winding needles, thereby expanding the application scope of the push-pin mechanism. At the same time, the push-pin drive mechanism is integrated on the main shaft of the winding device, which can simplify the push-pin drive mechanism and reduce the space occupied by the push-pin drive mechanism.

[0004] In a first aspect, an embodiment of the present application provides a needle pushing mechanism, which is applied to a winding device, comprising:

[0005] A push-needle shaft, the push-needle shaft being provided with a connection end for connecting with the winding needle and being provided with an airway for communicating with the negative pressure chamber of the winding needle;

[0006] A push-pin driving mechanism is used to drive the push-pin shaft to move and is provided with a connecting structure for connecting to the main shaft of the winding device.

[0007] In the above technical scheme, by setting an air channel connected to the winding needle negative pressure chamber inside the push needle shaft, the push needle mechanism can be suitable for both ordinary winding needles and vacuum winding needles, thereby expanding the application scope of the push needle mechanism. At the same time, the push needle drive mechanism is integrated on the main shaft of the winding equipment, which can simplify the push needle drive mechanism and reduce the space occupied by the push needle drive mechanism.

[0008] In some embodiments, the air channel extends along the axial direction of the push-needle shaft and is open at both ends of the push-needle shaft.

[0009] In some embodiments, a flange is provided at one end of the push-pin shaft, and the flange is used to connect with the winding needle.

[0010] In some embodiments, the push pin drive mechanism includes:

[0011] A slide rail, wherein the slide rail is provided with the connecting structure;

[0012] A sliding seat, the sliding seat is slidably matched with the slide rail, and the push pin shaft is installed on the sliding seat;

[0013] A push-pin driving member is connected to the sliding seat and is used for driving the sliding seat to slide.

[0014] In some embodiments, the slide rail comprises:

[0015] A bottom plate, the bottom plate is provided with the connecting structure and the bottom plate is provided with weight-reducing holes;

[0016] A plurality of tracks are arranged on the bottom plate at intervals, and the sliding seat is slidably matched with the plurality of tracks.

[0017] In some embodiments, it also includes:

[0018] A support seat, the support seat is mounted on the sliding seat, and the push pin shaft is supported on the support seat;

[0019] A rotating needle transmission member, the output end of which is connected to the push-pin shaft;

[0020] A rotating needle driving member, wherein the output end of the rotating needle driving member is connected to the input end of the rotating needle transmission member.

[0021] In some embodiments, the push needle shaft includes multiple sections that are sequentially connected along the axial direction and have gradually increasing outer diameters. The hose connected to the air pump, the output end of the rotating needle transmission member, and the winding needle are respectively connected to different sections.

[0022] In some embodiments, the support seat is provided with a first bearing for supporting the push-pin shaft, and the first bearing is limited by a nut threadedly connected to the push-pin shaft.

[0023] In a second aspect, an embodiment of the present application provides a winding device, the winding device comprising:

[0024] A winding needle, wherein the winding needle has a negative pressure chamber;

[0025] In the needle pushing mechanism as described in any of the above embodiments, the connecting end of the needle pushing shaft is connected to the winding needle, and the airway of the needle pushing shaft is in communication with the negative pressure chamber.

[0026] According to the winding device provided in the embodiment of the present application, by adopting the push-needle mechanism of any of the above-mentioned embodiments, the push-needle mechanism can be applicable to both ordinary winding needles and vacuum winding needles, thereby expanding the application scope of the push-needle mechanism. At the same time, the push-needle drive mechanism is integrated on the main shaft of the winding device, which can simplify the push-needle drive mechanism and reduce the space occupied by the push-needle drive mechanism.

[0027] In some embodiments, it also includes:

[0028] a first support member and a second support member, wherein the first support member and the second support member are spaced apart from each other;

[0029] A main shaft, the main shaft is supported by the first support member and the second support member, the main shaft is used to drive the winding needle to rotate around the main shaft, and the needle pushing mechanism is installed on the main shaft.

[0030] In some embodiments, the winding needle is mounted on the main shaft.

[0031] In a third aspect, an embodiment of the present application provides a battery production system, including:

[0032] A winding device as described in any one of the above;

[0033] A conveying device, the conveying device is used to convey the pole piece and the diaphragm to the winding device;

[0034] A pre-pressing device is used to pre-press the pole piece and the diaphragm after being wound by the winding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 One of the partial structural schematic diagrams of the pin pushing mechanism provided in some embodiments of the present application;

[0037] Figure 2 A partial cross-sectional view of a pin push mechanism provided in some embodiments of the present application;

[0038] Figure 3 The second schematic diagram of the partial structure of the pin pushing mechanism provided in some embodiments of the present application;

[0039] Figure 4 A schematic diagram of the connection between the push-pin mechanism and the winding pin provided in some embodiments of the present application;

[0040] Figure 5 A schematic diagram of the structure of a pin push mechanism provided in some embodiments of the present application;

[0041] Figure 6 One of the structural schematic diagrams of the winding device provided in some embodiments of the present application;

[0042] Figure 7The second structural schematic diagram of the winding device provided in some embodiments of the present application;

[0043] Figure 8 The third structural schematic diagram of the winding equipment provided in some embodiments of the present application.

[0044] Reference numerals:

[0045] Winding device 1, first support member 10, first support hole 11, drive motor 20, first gear 30, second gear 40, hose mounting hole 41;

[0046] The second support member 50, the support plate 51, the through hole 511, the support frame 52, the connecting arm 521, the support leg 522, and the support portion 523;

[0047] The main shaft 60, the mounting seat 61, the bottom 611, the connecting portion 612, the supporting member 6121, the reinforcing portion 613, the first mounting plane 62, and the second mounting plane 63;

[0048] The winding needle 70, the docking portion 71, the first pipe 72, and the second pipe 73;

[0049] Needle pushing mechanism 80, needle pushing shaft 81, first section 811, second bearing 8111, connecting seat 8112, second section 812, third bearing 8121, third section 813, fourth section 814, first bearing 8141, nut 8142, fifth section 815, flange 816, air passage 817;

[0050] Push-pin driving mechanism 82, slide rail 821, base plate 8211, weight-reducing hole 82111, track 8212, connecting structure 8213, push-pin actuator 822, sliding seat 8221, hose mounting bracket 82211, support seat 8222, rotating needle driving component 8223, rotating needle transmission component 8224, first pulley 82241, second pulley 82242, transmission belt 82243, push-pin driving component 823. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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 are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0053] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0054] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0056] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0057] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery consists of a box and multiple battery cells contained in the box. Among them, batteries, as core components of new energy vehicles, have high requirements in terms of safety and cycle life.

[0058] The battery production system disclosed in the embodiment of the present application is used to produce and manufacture batteries. It is understandable that the battery can be used as a power source for electrical devices such as mobile phones, tablets, laptops, electric vehicles, electric toys, and electric tools to provide electrical energy for the electrical devices. Among them, the battery may specifically include a casing and a battery cell contained in the casing. The battery cell is the smallest unit of the battery and can realize the conversion of electrical energy and chemical energy. Here, the battery cell should be understood in a broad sense, that is, the battery cell can be a secondary battery or a primary battery, or it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to this. The battery cell may be cylindrical, rectangular, or in other shapes.

[0059] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells or multiple battery modules. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0060] The battery cell includes a shell, an electrode assembly and an electrolyte, and the shell is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0061] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0062] Based on the above, it can be understood that the process of producing batteries in a battery production system is generally to produce battery cells, connect multiple battery cells in series or in parallel to form a battery module, and then assemble the battery module with structures such as a box into a battery. Among them, the process of manufacturing battery cells by battery production equipment generally includes front-end process, middle-end process and back-end process. Among them, the front-end process is used to make and process the positive electrode sheets and negative electrode sheets, and the main process involved is stirring, coating, slitting, etc.; the middle-end process is used to complete the molding of battery cells, and the main process involved is winding, pre-pressing, assembly, injection, sealing, etc.; the back-end process is used to activate the molded battery cells, and the main process involved is standing, forming, capacity division, packaging and inspection, etc.

[0063] In the above process, each process is completed by corresponding equipment. For example, winding is completed by winding equipment, and pre-pressing is completed by pre-pressing equipment. Conveying equipment is also provided between some processes to realize material transmission. For example, conveying equipment is provided upstream of the winding equipment to transport the pole piece and the diaphragm to the winding equipment.

[0064] When the electrode assembly is a wound structure, the positive electrode sheet, the negative electrode sheet and the isolation film need to be stacked together during the manufacturing process of the electrode assembly, and then the positive electrode sheet, the negative electrode sheet and the isolation film need to be wound into a core shape using a winding needle.

[0065] The inventors have discovered that in the related art, when a winding device uses a winding needle to wind a battery cell, it is necessary to use a needle pushing mechanism to drive the winding needle to move linearly along the axial direction to achieve the pulling out and pushing out of the winding needle. However, the current needle pushing mechanism can adapt to a small number of winding needle types. Some types of winding needles that cannot be adapted need to be pulled out or pushed out through other methods or structures, resulting in an increase in the number of parts and components of the winding device and a higher production cost.

[0066] Based on the above considerations, in order to solve the problem that the push-pin mechanism has a small application range and leads to a large number of parts in the winding device, the inventor has designed a push-pin mechanism after in-depth research, including a push-pin mechanism, including a push-pin shaft and a push-pin driving mechanism, the push-pin shaft is provided with a connecting end for connecting with the winding needle, and is provided with an air channel for communicating with the negative pressure chamber of the winding needle; the push-pin driving mechanism is used to drive the push-pin shaft to move, and is provided with a connecting structure for connecting to the main shaft of the winding device.

[0067] In the push-pin mechanism of this structure, by setting the push-pin shaft connected to the winding needle as a structure with an air channel connected to the winding needle negative pressure chamber inside, this structure can enable the push-pin shaft to drive the ordinary winding needle to move to achieve the pushing and pulling actions of the ordinary winding needle when connected to the ordinary winding needle, and can drive the vacuum winding needle to move to achieve the pushing and pulling actions of the vacuum winding needle when connected to the vacuum winding needle. At the same time, the negative pressure of the vacuum winding needle can be achieved when the air pump is pumping air to adsorb the electrode and isolation membrane that need to be wound, thereby improving the application scope of the push-pin mechanism, reducing the number of parts of the push-pin mechanism, and reducing production costs.

[0068] According to some embodiments of the present application, a needle pushing mechanism 80 is provided, which is applied to a winding device 1, such as Figure 1-Figure 5 As shown, the needle pushing mechanism 80 includes a needle pushing shaft 81 and a needle pushing driving mechanism 82 .

[0069] Among them, Figure 1-Figure 5 As shown, the push pin shaft 81 is provided with a connecting end for connecting with the winding needle 70. The connecting end of the push pin shaft 81 and the winding needle 70 can be connected by welding, threaded connection, bonding or other methods. The push pin shaft 81 and the winding needle 70 are connected axially.

[0070] The winding needle 70 can be an ordinary winding needle 70 or a vacuum winding needle 70. When the winding needle 70 is a vacuum winding needle 70, a negative pressure chamber is provided inside the winding needle 70, and a plurality of vacuum holes for vacuuming are provided on the surface of the winding needle 70.

[0071] like Figure 2 As shown, the push-pin shaft 81 is provided with an air passage 817 for communicating with the negative pressure chamber of the winding needle 70, and the winding needle 70 is provided with a docking portion 71 at one end close to the push-pin shaft 81. The docking portion 71 is connected to the connecting end of the push-pin shaft 81, and the docking portion 71 is communicated with the air passage 817 of the push-pin shaft 81, and the air passage 817 is communicated with a hose connected to the air pump.

[0072] The winding needle 70 is formed by two parts connected by bolts. A negative pressure cavity is arranged inside each part of the winding needle 70, that is, two negative pressure cavities are arranged inside the winding needle 70, and a first pipe 72 communicating with the corresponding negative pressure cavity is arranged outside each part. A second pipe 73 is arranged on the periphery of the docking portion 71. The outlet of the first pipe 72 can be arranged opposite to the outlet of the second pipe 73, or can be arranged opposite to each other or in other ways, for example, Figure 4 As shown, the outlet of the first pipe 72 and the outlet of the second pipe 73 are arranged opposite to each other, and the two are connected by a plastic pipe to form a closed channel.

[0073] like Figure 5As shown, the push pin drive mechanism 82 is used to drive the push pin shaft 81 to move. The push pin drive mechanism 82 can indirectly drive the push pin shaft 81 to move by rotation, or directly drive the push pin shaft 81 to move by linear movement. In some embodiments, the push pin drive mechanism 82 can include a cylinder, and the output end of the cylinder is connected to the push pin shaft 81, and the push pin shaft 81 is driven to move linearly through the extension and contraction of the cylinder.

[0074] like Figure 5 As shown, the push-pin driving mechanism 82 is provided with a connecting structure 8213 for connecting to the main shaft 60 of the winding device 1 , that is, the push-pin driving mechanism 82 is installed on the main shaft 60 of the winding device 1 through the connecting structure 8213 .

[0075] During the actual implementation process, when the winding needle 70 is an ordinary winding needle 70, the output end of the push-pin driving mechanism 82 is connected to the push-pin shaft 81, and the push-pin shaft 81 is driven to move axially by rotation or movement, and the winding needle 70 is driven to move axially to realize the action of pulling out and pushing the winding needle 70.

[0076] When the winding needle 70 is a vacuum winding needle 70, a negative pressure chamber is provided inside the winding needle 70, and the first pipe 72 and the second pipe 73 are connected through a plastic tube, that is, the negative pressure chamber of the winding needle 70 is connected with the air channel 817 of the push needle shaft 81 through the first pipe 72 and the second pipe 73, and the push needle driving mechanism 82 drives the push needle shaft 81 to move axially, and drives the winding needle 70 to move axially, and at the same time the air pump draws air, and the air in the negative pressure chamber of the winding needle 70 passes through the first pipe 72, the second pipe 73, the air channel 817 and the hose to the air pump in turn. At this time, the negative pressure chamber of the winding needle 70 is in a negative pressure state to adsorb the electrode and the isolation membrane.

[0077] By setting an air passage 817 connected to the negative pressure chamber of the winding needle 70 inside the push-pin shaft 81, the push-pin mechanism 80 can be suitable for both the ordinary winding needle 70 and the vacuum winding needle 70. The air passage 817 can facilitate the vacuuming of the negative pressure chamber of the winding needle 70, reduce the number of components, and expand the application scope of the push-pin mechanism 80. At the same time, the push-pin drive mechanism 82 is installed on the main shaft 60 of the winding device 1 through the connecting structure 8213, that is, the push-pin drive mechanism 82 is integrated on the main shaft 60 of the winding device 1, which can reduce the components used to install the push-pin drive mechanism 82 and the size of the space occupied by the push-pin drive mechanism 82.

[0078] According to the push-pin mechanism 80 provided in the embodiment of the present application, by setting an air duct 817 connected to the negative pressure chamber of the winding needle 70 inside the push-pin shaft 81, the push-pin mechanism 80 can be applicable to both the ordinary winding needle 70 and the vacuum winding needle 70, thereby expanding the application scope of the push-pin mechanism 80. At the same time, the push-pin drive mechanism 82 is integrated on the main shaft 60 of the winding device 1, which can simplify the push-pin drive mechanism 82 and reduce the space occupied by the push-pin drive mechanism 82.

[0079] In some embodiments, Figure 5 As shown, the air passage 817 extends along the axial direction of the push-needle shaft 81 and is open at both ends of the push-needle shaft 81 .

[0080] Among them, the negative pressure chamber of the winding needle 70 extends along the axial direction of the winding needle 70, and the air channel 817 is open at both ends of the push needle shaft 81. The air channel 817 is connected to the negative pressure chamber of the winding needle 70 at the end of the push needle shaft 81 close to the winding needle 70, and the air channel 817 is connected to the hose connected to the air pump at the end of the push needle shaft 81 away from the winding needle 70.

[0081] During the actual implementation process, when the air pump is pumping air, the air located in the negative pressure chamber of the winding needle 70 and the air channel 817 of the push needle shaft 81 is driven to flow axially and enter the air pump through the hose. The air located in the negative pressure chamber of the winding needle 70 directly enters the air channel 817 when it flows out of the negative pressure chamber axially, and can continue to flow into the air pump in the same direction to put the negative pressure chamber in a negative pressure state.

[0082] It can be understood that if the extension direction of the air channel 817 intersects with the extension direction of the negative pressure chamber of the winding needle 70 at a large angle, a larger air pump power is required to achieve the negative pressure state of the negative pressure chamber. Therefore, setting the air channel 817 to extend along the axial direction of the push needle shaft 81 can reduce the power of the air pump during operation and reduce energy consumption.

[0083] In some embodiments, Figure 1-Figure 5 As shown, a flange 816 is provided at one end of the push-pin shaft 81 , and the flange 816 is used to connect with the winding needle 70 .

[0084] Among them, Figure 1-Figure 5 As shown, a flange 816 is provided at the connection end of the push pin shaft 81 , and a flange 816 is also provided at one end of the winding needle 70 close to the push pin shaft 81 . The push pin shaft 81 and the winding needle 70 are connected via the flange 816 and bolts.

[0085] By connecting the push pin shaft 81 to the winding needle 70 through the flange 816, the connection stability between the push pin shaft 81 and the flange 816 can be improved. At the same time, since the flange 816 has a certain sealing performance, the probability of air leakage from the connection between the push pin shaft 81 and the winding needle 70 when the air pump is pumping air can be reduced, thereby improving the stability of the adsorption electrode and the isolation membrane when the winding needle 70 is a vacuum winding needle 70.

[0086] The present application also provides a winding device 1, such as Figure 6-Figure 8 As shown, the winding device 1 includes a winding needle 70, a first support member 10, a second support member 50 and a needle pushing mechanism 80 as in any of the above embodiments.

[0087] Among them, Figure 6-Figure 8As shown, the needle pushing mechanism 80 is installed on the main shaft 60 and connected to the winding needle 70. The winding needle 70 is installed on the main shaft 60. The needle pushing mechanism 80 is installed on the main shaft 60 through the connecting structure 8213. One end of the winding needle 70 is connected to the needle pushing mechanism 80, and the other end is installed on the main shaft 60. The needle pushing mechanism 80 is used to drive the winding needle 70 to move.

[0088] like Figure 6-Figure 8 As shown, the first support member 10 and the second support member 50 are arranged at intervals, the main shaft 60 is supported by the first support member 10 and the second support member 50, the first support member 10 and the second support member 50 are arranged at intervals along the axial direction of the main shaft 60, and the two ends of the main shaft 60 are supported on the first support member 10 and the second support member 50 respectively.

[0089] like Figure 6-Figure 8 As shown, the main shaft 60 is used to drive the winding needle 70 to rotate around the main shaft 60. The first support member 10 is provided with a first support hole 11 that penetrates the first support member 10 axially along the main shaft 60. One end of the main shaft 60 is supported in the first support hole 11 of the first support member 10. A bearing can be arranged between the main shaft 60 and the first support hole 11 to facilitate the rotation of the main shaft 60 around the axis. A bearing can also be arranged between the main shaft 60 and the second support member 50.

[0090] The winding device 1 also includes a spindle drive, such as Figure 6-Figure 8 As shown, in some embodiments, the spindle driving member may include a first gear 30, a second gear 40 and a driving motor 20, the first gear 30 is externally meshed with the second gear 40, and the diameter and the number of teeth of the first gear 30 are smaller than the diameter and the number of teeth of the second gear 40, the first gear 30 is mounted on the output shaft of the driving motor 20, and the second gear 40 is mounted on the spindle 60, and the first gear 30 is driven to rotate by the output power of the driving motor 20, so that the first gear 30 drives the second gear 40 and the spindle 60 to rotate, and since the winding needle 70 and the pushing needle mechanism 80 are both mounted on the spindle 60, the rotation of the spindle 60 can drive the winding needle 70 and the pushing needle mechanism 80 to rotate around the spindle 60 together, and the spindle 60 is driven to rotate by the first gear 30, the second gear 40 and the driving motor 20, and the transmission ratio is relatively large, so that the rotation speed of the spindle 60 can be lower than the rotation speed of the motor, thereby reducing the probability of poor effect of winding the pole piece and the battery cell due to excessive rotation speed of the spindle 60, and the transmission efficiency is relatively high.

[0091] In other embodiments, the spindle driving member may include only the driving motor 20 , the output shaft of the driving motor 20 is connected to the spindle 60 , and the driving motor 20 directly drives the spindle 60 to rotate.

[0092] like Figure 6-Figure 8As shown, when installing the winding device 1, the spindle driving member is connected to the spindle 60, and the two ends of the spindle 60 are supported on the first support member 10 and the second support member 50 respectively, and then the needle pushing mechanism 80 is connected to the winding needle 70. In the actual implementation process, the spindle 60 of the spindle driving member rotates. Since the needle pushing mechanism 80 and the winding needle 70 are both installed on the spindle 60, the rotation of the spindle 60 drives the needle pushing mechanism 80 and the winding needle 70 to rotate around the spindle 60 at the same time. At the same time, the needle pushing mechanism 80 is used to drive the winding needle 70 to move along the axial direction of the spindle 60, thereby realizing the pushing and pulling of the winding needle 70.

[0093] It is understandable that if the push-pin mechanism 80 and the winding needle 70 are installed on different rotating shafts respectively, that is, the main shaft 60 is composed of multiple rotating shafts, then during installation, the multiple rotating shafts need to be connected in sequence, and then the push-pin mechanism 80 and the winding needle 70 are connected. The installation steps are relatively complicated, and during use, the multiple rotating shafts may be offset. At this time, the rotating shafts need to be debugged, and the accuracy between the multiple rotating shafts is difficult to guarantee. Therefore, by installing the push-pin mechanism 80 and the winding needle 70 on the same main shaft 60, and driving the push-pin mechanism 80 and the winding needle 70 to rotate at the same time through the main shaft 60, the installation steps of the winding device 1 can be reduced, and the installation accuracy of the main shaft 60 can be improved. At the same time, the probability of the main shaft 60 being deformed during transportation and unable to be docked can be reduced, thereby reducing the installation difficulty of the winding device 1.

[0094] According to the winding device 1 provided in the embodiment of the present application, by installing the push-pin mechanism 80 and the winding needle 70 on the same main shaft 60, the installation steps of the winding device 1 can be reduced, and the installation accuracy of the main shaft 60 can be improved. At the same time, the probability of the main shaft 60 being deformed during transportation and unable to dock can be reduced, thereby reducing the difficulty of installing the winding device 1.

[0095] In some embodiments, Figure 7 and Figure 8 As shown, the winding device 1 further includes a mounting seat 61 , which is mounted on the main shaft 60 , and a front end of a winding needle 70 is supported on the mounting seat 61 , and a rear end of the winding needle 70 is connected to a needle pushing mechanism 80 .

[0096] Among them, Figure 7 and Figure 8 As shown, the end of the winding needle 70 close to the second support member 50 is the front end of the winding needle 70, and the end of the winding needle 70 close to the first support member 10 is the rear end of the winding needle 70. The mounting seat 61 is installed at a position of the main shaft 60 close to the second support member 50, and a bearing can be provided between the mounting seat 61 and the winding needle 70.

[0097] In some embodiments, Figure 7 and Figure 8As shown, there can be multiple winding needles 70, and there can also be multiple mounting seats 61, and the multiple winding needles 70 and the multiple mounting seats 61 are arranged in a one-to-one correspondence.

[0098] In other embodiments, multiple winding needles 70 and one mounting seat 61 may also be provided, and the multiple winding needles 70 are all supported on the same mounting seat 61 .

[0099] During the actual implementation process, when the push-pin mechanism 80 drives the winding needle 70 to move toward the direction close to the first support member 10, the winding needle 70 is separated from the mounting seat 61 to facilitate the winding of the pole piece and the isolation membrane to fall to the next process; when the push-pin mechanism 80 drives the winding needle 70 to move toward the direction close to the second support member 50, the front end of the winding needle 70 is supported on the mounting seat 61 to improve the stability of the winding needle 70 when winding the pole piece and the isolation membrane.

[0100] By disposing the mounting seat 61, the stability of the winding needle 70 when winding the pole piece and the isolation film can be improved, thereby improving the quality of the finished product obtained after winding the pole piece and the isolation film.

[0101] In some embodiments, Figure 7-Figure 8 As shown, a first mounting plane 62 is provided on the peripheral wall of the main shaft 60 , and the mounting seat 61 is mounted on the first mounting plane 62 .

[0102] Among them, Figure 7-Figure 8 As shown, a first mounting plane 62 is provided on the peripheral wall of one end of the main shaft 60 close to the second support member 50. The first mounting plane 62 can extend along the axial direction of the main shaft 60. The first mounting plane 62 can be a circular structure, a trapezoidal structure or other shape structures. For example, the first mounting plane 62 is a rectangular structure.

[0103] like Figure 8 As shown, the bottom surface of the mounting seat 61 is a plane, and the mounting seat 61 is installed on the first mounting plane 62. The mounting seat 61 can be installed on the first mounting plane 62 by welding, bonding, snap connection or other methods. For example, the mounting seat 61 is installed on the first mounting plane 62 by a threaded connection.

[0104] In some embodiments, Figure 7-Figure 8 As shown, there are multiple first mounting planes 62 , which are spaced apart along the circumference of the main shaft 60 , and there are also multiple mounting seats 61 , which are installed in a one-to-one correspondence with the multiple first mounting planes 62 and the multiple mounting seats 61 .

[0105] In some other embodiments, the first mounting planes 62 are multiple and continuous, and the multiple mounting seats 61 are all mounted on the first mounting planes 62 .

[0106] By installing the mounting seat 61 on the first mounting plane 62 , the contact area between the mounting seat 61 and the main shaft 60 can be increased, thereby improving the installation stability of the mounting seat 61 on the main shaft 60 and improving the stability of supporting the winding needle 70 .

[0107] In some embodiments, Figure 7 As shown, the mounting seat 61 includes a bottom portion 611 , a connecting portion 612 and a reinforcing portion 613 .

[0108] Among them, Figure 7 As shown, the bottom 611 is installed on the main shaft 60, the bottom surface of the bottom 611 is a plane, and the bottom 611 can be installed on the first installation plane 62 through a threaded connector.

[0109] like Figure 7 As shown, the connecting portion 612 is connected to the bottom 611 and is provided with a supporting member 6121. The front end of the winding needle 70 is supported on the supporting member 6121. The lower end of the connecting portion 612 is connected to the bottom 611. The connecting portion 612 can be in a vertical state with the bottom 611, that is, the connecting portion 612 protrudes radially outward relative to the outer surface of the main shaft 60. The connecting portion 612 can also present an angle of other values ​​with the bottom 611.

[0110] like Figure 7 As shown, the reinforcing portion 613 is connected between the bottom 611 and the connecting portion 612. The reinforcing portion 613 can be a right-angled triangle structure. The two right-angled surfaces of the reinforcing portion 613 are respectively connected to the connecting portion 612 and the bottom 611. The inclined surface of the reinforcing portion 613 can be a plane or a curved surface.

[0111] By setting the mounting seat 61 as a bottom 611, a connecting portion 612 and a reinforcing portion 613, a mounting position can be provided for the mounting seat 61 to be installed on the first mounting plane 62, and a support member 6121 can be provided for the winding needle 70. At the same time, the overall strength of the mounting seat 61 can be improved by the reinforcing portion 613, further improving the stability of the mounting seat 61 in supporting the winding needle 70.

[0112] In some embodiments, Figure 3-Figure 5 and Figure 7 As shown, the needle pushing mechanism 80 includes a slide rail 821 , a needle pushing actuator 822 and a needle pushing driving member 823 .

[0113] The slide rail 821 may be a rectangular structure, a cylindrical structure or other shapes, such as Figure 3-Figure 5 and Figure 7 As shown, the slide rail 821 is a rectangular structure.

[0114] like Figure 6 and Figure 7As shown, the slide rail 821 is installed on the main shaft 60, and a second installation plane 63 is provided on the peripheral wall of the main shaft 60. The second installation plane 63 extends along the axial direction of the main shaft 60. The bottom surface of the slide rail 821 is a plane, and the slide rail 821 is installed on the second installation plane 63 to increase the contact area between the slide rail 821 and the main shaft 60 and improve the installation stability between the slide rail 821 and the main shaft 60.

[0115] like Figure 4 As shown, the slide rail 821 is provided with a connecting structure 8213, and the connecting structure 8213 can be a connecting hole. The slide rail 821 is installed as a whole on the main shaft 60 of the winding device 1 by means of bolts passing through the connecting hole. The connecting hole can be a connecting hole that cooperates with a countersunk bolt so that the bolt can be located in the connecting hole.

[0116] The slide rail 821 may be provided with a plurality of connection structures 8213, or may be provided with a single connection structure 8213, for example, Figure 4 As shown, the slide rail 821 is provided with a plurality of connection structures 8213 , and the plurality of connection structures 8213 can be arranged at intervals along the length direction of the slide rail 821 to improve the installation stability of the slide rail 821 and reduce the probability of the slide rail 821 falling off the main shaft 60 of the winding device 1 .

[0117] The push-pin actuator 822 is slidably mounted on the slide rail 821. The push-pin actuator 822 may include a sliding seat 8221. The push-pin actuator 822 is connected to the winding needle 70. The sliding seat 8221 may be a trapezoidal structure, a triangular structure or other shapes, such as Figure 5 and Figure 7 As shown, the sliding seat 8221 is a rectangular structure.

[0118] The sliding seat 8221 is slidably matched with the slide rail 821. A groove is provided at the lower end of the sliding seat 8221. The slide rail 821 is installed in the groove of the sliding seat 8221, and the sliding seat 8221 can slide on the slide rail 821. The push-pin actuator 822 as a whole slides on the slide rail 821 through the sliding seat 8221 of the push-pin actuator 822.

[0119] The lower end of the sliding seat 8221 may be provided with a plurality of grooves spaced apart along the sliding direction, or may be provided with a groove having a longer length, for example, Figure 5 and Figure 7 As shown, two grooves are arranged at intervals along the sliding direction at the lower end of the sliding seat 8221 to increase the contact area between the sliding seat 8221 and the slide rail 821 and improve the stability of the sliding seat 8221 when sliding.

[0120] like Figure 5 and Figure 7As shown, the push-pin driving member 823 is connected to the push-pin actuator 822, and is used to drive the push-pin actuator 822 to slide. The push-pin driving member 823 can be connected to the sliding seat 8221 of the push-pin actuator 822, and is used to drive the sliding seat 8221 to slide. In some embodiments, the push-pin driving member 823 may include a motor and a screw mechanism. The screw of the screw mechanism is installed on the slide rail 821, and the screw extends along the sliding direction of the sliding seat 8221. The nut 8142 of the screw mechanism is installed on the screw, and the nut 8142 is connected to the sliding seat 8221. The output end of the motor is connected to the screw, and the screw is driven to rotate by the motor, and the nut 8142 is moved along the axial direction of the screw, so that the push-pin actuator 822 and the winding needle 70 are both moved along the axial direction of the screw, thereby realizing the pushing and pulling of the winding needle 70.

[0121] In other embodiments, the push-pin driving member 823 may include a synchronous belt linear module, and the synchronous belt linear module drives the push-pin actuator 822 to slide.

[0122] By setting the above-mentioned slide rail 821, the push-pin actuator 822 and the push-pin driving member 823, the pushing and pulling of the winding needle 70 can be realized, and the structure is simple, the driving method is simple, and the structure of the push-pin mechanism 80 is further simplified, reducing the production cost.

[0123] In some embodiments, Figure 3-Figure 5 As shown, the slide rail 821 includes a base plate 8211 and a plurality of rails 8212 .

[0124] Among them, Figure 3-Figure 5 As shown, the track 8212 is installed on the upper surface of the base plate 8211, the base plate 8211 is installed on the main shaft 60, and the base plate 8211 is provided with a connecting structure 8213. The connecting structure 8213 can be set at the position corresponding to the base plate 8211 and the track 8212, and the connecting structure 8213 runs through the base plate 8211 and the track 8212 at the same time, so as to facilitate the staff to install the slide rail 821.

[0125] The bottom plate 8211 is provided with a weight-reducing hole 82111, which can be provided at a position on the bottom plate 8211 where the track 8212 is not installed. The bottom plate 8211 can be provided with a plurality of weight-reducing holes 82111, or can be provided with one weight-reducing hole 82111, for example, Figure 3-Figure 5 As shown, the bottom plate 8211 is provided with a plurality of weight-reducing holes 82111 , and the plurality of weight-reducing holes 82111 are arranged at intervals along the length direction of the bottom plate 8211 .

[0126] like Figure 3-Figure 5As shown, a plurality of rails 8212 are arranged at intervals on the bottom plate 8211, and the sliding seat 8221 is slidably matched with the plurality of rails 8212. The plurality of rails 8212 can be arranged at intervals along the width direction of the bottom plate 8211, and a plurality of grooves arranged at intervals along the width direction of the bottom plate 8211 are provided at the lower end of the sliding seat 8221. The plurality of grooves distributed along the width direction of the bottom plate 8211 are arranged one-to-one correspondingly to the plurality of rails 8212.

[0127] By configuring the slide rail 821 to include a bottom plate 8211 and a plurality of rails 8212 , the sliding seat 8221 can be supported simultaneously by the plurality of rails 8212 , thereby improving the stability of the sliding seat 8221 when sliding.

[0128] In some embodiments, Figure 5-Figure 7 As shown, the needle pushing actuator 822 includes a needle rotating driving member 8223 , a needle rotating transmission member 8224 and a needle pushing shaft 81 .

[0129] The push-pin actuator 822 may further include a support seat 8222 and a push-pin shaft 81. The support seat 8222 may be a circular structure, a trapezoidal structure or other shapes, such as Figure 5-Figure 7 As shown, the support seat 8222 is a rectangular structure.

[0130] The support seat 8222 is installed on the sliding seat 8221. The support seat 8222 can be installed on the sliding seat 8221 by welding, snap connection, bonding or other methods. For example, Figure 5-Figure 7 As shown, the support seat 8222 is connected to the sliding seat 8221 by threaded connection.

[0131] The winding needle 70 can be an ordinary winding needle 70 or a vacuum winding needle 70. When the winding needle 70 is a vacuum winding needle 70, a negative pressure chamber is provided inside the winding needle 70, and a plurality of vacuum holes for vacuuming are provided on the surface of the winding needle 70.

[0132] like Figure 5-Figure 7 As shown, the push pin shaft 81 is connected to the winding needle 70, the connecting end of the push pin shaft 81 is connected to the winding needle 70, and the airway 817 of the push pin shaft 81 is connected to the negative pressure chamber, the push pin shaft 81 is provided with an airway 817 for communicating with the negative pressure chamber of the winding needle 70, and the end of the winding needle 70 close to the push pin shaft 81 is connected with a docking part 71, the docking part 71 is connected to the connecting end of the push pin shaft 81, and the docking part 71 is connected to the airway 817 of the push pin shaft 81, and the airway 817 is connected to a hose connected to the air pump.

[0133] The winding needle 70 is formed by two parts connected by bolts. A negative pressure cavity is arranged inside each part of the winding needle 70, that is, two negative pressure cavities are arranged inside the winding needle 70, and a first pipe 72 communicating with the corresponding negative pressure cavity is arranged outside each part. A second pipe 73 is arranged on the periphery of the docking portion 71. The outlet of the first pipe 72 can be arranged opposite to the outlet of the second pipe 73, or can be arranged opposite to each other or in other ways, for example, Figure 4 As shown, the outlet of the first pipe 72 and the outlet of the second pipe 73 are arranged opposite to each other, and the two are connected by a plastic pipe to form a closed channel.

[0134] like Figure 5-Figure 7 As shown, the rotating needle driving component 8223 is installed on the sliding seat 8221. The rotating needle driving component 8223 can be a motor. The rotating needle driving component 8223 can be installed on the sliding seat 8221 or on the supporting seat 8222.

[0135] like Figure 5-Figure 7 As shown, the input end of the rotating needle transmission member 8224 is connected to the output end of the rotating needle driving member 8223, and the rotating needle transmission member 8224 may include a first pulley 82241, a second pulley 82242 and a transmission belt 82243. The output end of the rotating needle driving member 8223 is connected to the first pulley 82241 by power, and the first pulley 82241 is connected to the second pulley 82242 by the transmission belt 82243. The rotating needle driving member 8223 drives the first pulley 82241 to rotate, and the first pulley 82241 transmits power to the second pulley 82242 through the transmission belt 82243 to rotate the second pulley 82242.

[0136] like Figure 5-Figure 7 As shown, the output end of the rotating needle transmission member 8224 is connected to the push-pin shaft 81, and the push-pin shaft 81 is supported on the support seat 8222. The support seat 8222 is provided with a supporting hole that penetrates the support seat 8222 along the sliding direction of the push-pin shaft 81. One end of the push-pin shaft 81 passes through the supporting hole and is supported in the supporting hole. At this time, the connecting end of the push-pin shaft 81 and the position connected to the output end of the rotating needle transmission member 8224 are respectively located on both sides of the support seat 8222 to improve the balance stability of the support seat 8222 supporting the push-pin shaft 81.

[0137] like Figure 5-Figure 7As shown, the second pulley 82242 is installed on the push-pin shaft 81. When the rotating needle driving member 8223 drives the first pulley 82241 to rotate, the first pulley 82241 transmits power to the second pulley 82242 through the transmission belt 82243, and the second pulley 82242 drives the push-pin shaft 81 together. Since the connecting end of the push-pin shaft 81 is connected to the winding needle 70, the second pulley 82242 drives the push-pin shaft 81 and the winding needle 70 to rotate together. The winding needle 70 is driven to rotate by the first pulley 82241, the second pulley 82242 and the transmission belt 82243, which can reduce the rotation speed of the winding needle 70 so that the winding needle 70 is at a suitable winding speed.

[0138] like Figure 5-Figure 7 As shown, a hose mounting bracket 82211 is provided on the outside of the second pulley 82242, and a hose mounting hole 41 for passing the hose is provided on the second gear 40. One end of the hose is connected to the air channel 817 of the push-pin shaft 81, and the other end passes through the hose mounting bracket 82211 and the hose mounting hole 41 of the second gear 40 in sequence and then is connected to the air pump.

[0139] The needle drive member 8223 and the needle push shaft 81 can be located on the same side of the first pulley 82241 and the second pulley 82242, or on different sides of the first pulley 82241 and the second pulley 82242. Figure 5-Figure 7 As shown, the rotating needle driving member 8223 and the pushing needle shaft 81 are located on the same side of the first pulley 82241 and the second pulley 82242 .

[0140] In other embodiments, the needle transmission member 8224 may include a gear set or other structures.

[0141] Through the arrangement of the above-mentioned rotating needle driving member 8223, the rotating needle transmission member 8224 and the pushing needle shaft 81, the rotating needle driving member 8223 and the rotating needle transmission member 8224 can be used to drive the winding needle 70 to rotate around its own axis while driving the sliding rail 821 and the pushing needle driving member 823 to move axially, so as to realize the action of the winding needle 70 winding the pole piece and the isolation membrane. The structure is simple and the axial length is short, which can reduce the overall axial length of the winding device 1.

[0142] In some embodiments, Figure 2 As shown, the push needle shaft 81 includes multiple sections which are connected in sequence along the axial direction and whose outer diameters gradually increase. The hose connected to the air pump, the output end of the rotating needle transmission member 8224 and the winding needle 70 are respectively connected to different sections.

[0143] Among them, Figure 2As shown, the push pin shaft 81 includes first to fifth sections 815 which are connected in sequence along the axial direction and whose outer diameters gradually increase. The first to fifth sections 815 are distributed in sequence from the end of the push pin shaft 81 away from the winding needle 70 to the end of the push pin shaft 81 close to the winding needle 70.

[0144] like Figure 2 As shown, the first section 811 is used to connect with the hose, and the end of the first section 811 away from the winding needle 70 is installed with a connecting seat 8112, and the connecting seat 8112 is provided with a push pin hole penetrating along the axial direction, one end of the push pin hole is connected to the airway 817 of the push pin shaft 81, and the other end is used to connect with the hose. Since the hose needs to pass through the hose mounting bracket 82211 located outside the second pulley 82242, the first section 811 of the push pin shaft 81 is supported on the hose mounting bracket 82211, and the first section 811 A second bearing 8111 is provided with the hose mounting bracket 82211; the second section 812 is connected to the output end of the rotating needle transmission member 8224, that is, the second pulley 82242 is installed on the second section 812 of the push-pin shaft 81, and a third bearing 8121 can be provided between the outer periphery of the second section 812 and the second pulley 82242; the third section 813, the fourth section 814 and the fifth section 815 are all used to be connected to the winding needle 70, and the end of the fifth section 815 facing away from the fourth section 814 is connected to the flange 816.

[0145] Since the push pin shaft 81 needs to transmit power to the winding needle 70, the outer diameter of the push pin shaft 81 is set to gradually increase from the end of the push pin shaft 81 away from the winding needle 70 to the end of the push pin shaft 81 close to the winding needle 70. This can improve the strength of the position where the push pin shaft 81 is connected to the winding needle 70 and reduce the probability of deformation, breakage or other damages of the push pin shaft 81 due to insufficient strength of the push pin shaft 81.

[0146] In some embodiments, the support seat 8222 is provided with a first bearing 8141 for supporting the push-pin shaft 81 , and the first bearing 8141 is limited by a nut 8142 threadedly connected to the push-pin shaft 81 .

[0147] Among them, Figure 2 As shown, the support seat 8222 is installed at the third section 813, the fourth section 814 and the fifth section 815 of the push-pin shaft 81, and the first bearings 8141 are provided on the outer periphery of both ends of the fourth section 814 of the push-pin shaft 81 along the axial direction.

[0148] like Figure 2As shown, a nut 8142 is provided at one end of the support seat 8222 close to the third section 813, and the nut 8142 is threadedly connected to the third section 813 of the push-pin shaft 81. The inner diameter of the nut 8142 is smaller than the outer diameter of the first bearing 8141. Therefore, the first bearing 8141 close to the third section 813 of the push-pin shaft 81 is axially stopped against the end face of the nut 8142 to axially limit the first bearing 8141 close to the third section 813 of the push-pin shaft 81. Since the outer diameter of the fifth section 815 is larger than the outer diameter of the fourth section 814, a step surface is formed between the fifth section 815 and the fourth section 814, and the first bearing 8141 close to the fifth section 815 of the push-pin shaft 81 is axially stopped against the step surface of the fifth section 815 to axially limit the first bearing 8141 close to the fifth section 815 of the push-pin shaft 81.

[0149] Through the setting of the above-mentioned first bearing 8141, the rotation of the push-pin shaft 81 relative to the support seat 8222 can be facilitated, thereby reducing the friction between the push-pin shaft 81 and the support seat 8222; through the setting of the above-mentioned nut 8142, the probability of the first bearing 8141 escaping from the support seat 8222 can be reduced, and the structure is simple and the limiting method is simple.

[0150] In some embodiments, Figure 6-Figure 8 As shown, there are multiple winding needles 70, which are installed on the main shaft 60 at intervals around the circumference of the main shaft 60; there are multiple needle pushing mechanisms 80, which are installed on the main shaft 60 at intervals around the circumference of the main shaft 60 and are connected to the multiple winding needles 70 one by one.

[0151] Among them, Figure 6-Figure 8 As shown, the peripheral wall of the main shaft 60 is provided with multiple first mounting planes 62, multiple second mounting planes 63 and multiple mounting seats 61. The multiple first mounting planes 62 are arranged at circumferential intervals around the main shaft 60, and the multiple second mounting planes 63 are arranged at circumferential intervals around the main shaft 60. The multiple mounting seats 61 are arranged one-to-one corresponding to the multiple first mounting planes 62, and the slide rails 821 of the multiple push-pin mechanisms 80 are installed one-to-one corresponding to the multiple second mounting planes 63.

[0152] like Figure 6-Figure 8 As shown, multiple pin pushing mechanisms 80 are connected to multiple winding needles 70 in a one-to-one correspondence, that is, each winding needle 70 corresponds to a pin pushing mechanism 80 that can drive the winding needle 70 to rotate and move. Therefore, the pin pushing mechanism 80 can be used to individually control the working state of the corresponding winding needle 70 according to actual conditions, thereby improving the accuracy of the winding needle 70 during operation.

[0153] In some embodiments, Figure 6-Figure 8 As shown, the second support member 50 includes a support plate 51 and a support frame 52 .

[0154] The support plate 51 may be a circular structure, a trapezoidal structure or other shapes, such as Figure 6-Figure 8 As shown, the support plate 51 is a rectangular structure.

[0155] like Figure 6-Figure 8 As shown, the support plate 51 is provided with a through hole 511, the main shaft 60 and the winding needle 70 pass through the through hole 511, the first support member 10 is located on one side of the support plate 51, and the mounting seat 61 is located on the other side of the support plate 51, the main shaft 60 always passes through the through hole 511, and when the winding needle 70 is supported on the mounting seat 61, one end of the winding needle 70 passes through the through hole 511 and is supported on the mounting seat 61.

[0156] The support frame 52 is connected to the support plate 51 through a plurality of spaced apart connection positions, and the plurality of connection positions may be located at different sides of the through hole 511, or may be located at the same side of the through hole 511, for example. Figure 6-Figure 8 As shown, a plurality of connection positions are located on opposite sides of the through hole 511 to improve the balance of the connection between the support frame 52 and the support plate 51 .

[0157] The main shaft 60 is supported by the support frame 52 . A groove is provided on the side of the support frame 52 facing the main shaft 60 . The end of the support frame 52 is installed in the groove. A bearing is provided between the end of the support frame 52 and the inner wall of the groove.

[0158] By arranging the support frame 52 and the support plate 51 to be connected through a plurality of spaced-apart connection positions, the fixing area of ​​the support frame 52 and the support plate 51 can be increased, and the stability of the support frame 52 and the support plate 51 in supporting the main shaft 60 can be improved. Moreover, the plurality of connection positions are arranged at intervals, and the external force applied to the support plate 51 by the support frame 52 can be dispersed to different positions, thereby reducing the force on the support plate 51 at a connection position, thereby reducing the deformation of the support plate 51 caused by the force, and improving the accuracy of the support plate 51.

[0159] In some embodiments, Figure 6-Figure 8 As shown, the support frame 52 includes a support portion 523 , a plurality of connecting arms 521 and a plurality of supporting legs 522 .

[0160] The main shaft 60 is supported on the support portion 523, and the support portion 523 may be a rectangular structure, a trapezoidal structure or other shapes, such as Figure 6-Figure 8 As shown, the support portion 523 is a circular structure. A groove is provided on the side of the support portion 523 facing the main shaft 60 , and the end of the main shaft 60 is supported in the groove of the support portion 523 .

[0161] like Figure 6-Figure 8As shown, the multiple connecting arms 521 are spaced apart and connected to the support portion 523 , one end of the multiple connecting arms 521 is connected to the support portion 523 , and the other ends of the multiple connecting arms 521 extend outward along different radial directions of the support portion 523 .

[0162] like Figure 6-Figure 8 As shown, multiple support legs 522 are connected to multiple connecting arms 521 in a one-to-one correspondence, and are connected to multiple connecting positions of the support plate 51, one end of the multiple support legs 522 is respectively connected to one end of the multiple connecting arms 521 away from the supporting portion 523 in a one-to-one correspondence, and the other ends of the multiple support legs 522 are all connected to the support plate 51, and the connection between the support legs 522 and the support plate 51 is the connecting position.

[0163] The support legs 522 can be arranged perpendicularly to the support plate 51, or can be arranged obliquely relative to the support plate 51, for example, Figure 6-Figure 8 As shown, the support legs 522 are arranged perpendicular to the support plate 51 .

[0164] Through the arrangement of the above-mentioned support part 523, connecting arm 521 and support leg 522, when the support part 523 is subjected to external force from the main shaft 60, the external force exerted on the support part 523 can be evenly distributed at multiple connection positions, further reducing the stress deformation of the support plate 51, while improving the overall strength of the support frame 52 and the bearing capacity of the support frame 52.

[0165] In some embodiments, Figure 6-Figure 8 As shown, at least three of the plurality of connection locations are not arranged collinearly.

[0166] Among them, Figure 6-Figure 8 As shown, the support frame 52 is connected to the support plate 51 via three connection positions, and the three connection positions are not arranged in a colinear manner, that is, the three connection positions form a triangular structure.

[0167] Since the triangle itself is stable, setting at least three of the multiple connection positions to be non-collinear can form at least one triangle among the multiple connection positions, thereby further improving the stability of the support frame and reducing the probability of affecting the winding work of the main shaft and winding needle due to unstable shaking of the support frame.

[0168] The present application also discloses a battery production system, including: a conveying device, a winding device 1 and a pre-pressing device.

[0169] The conveying device is used to transport the pole piece and the diaphragm to the winding device 1 ; the winding device is the winding device 1 described in any one of the above embodiments; the pre-pressing device is used to pre-press the pole piece and the diaphragm wound by the winding device 1 .

[0170] The battery production system of the present application, by designing a winding device 1 with the above-mentioned structural form, can reduce the probability of the winding needle mounting shaft and the support shaft being offset during the docking process or deforming during transportation, resulting in multiple adjustments to the docking position, thereby reducing the installation difficulty of the winding device 1, improving the installation efficiency and the working efficiency of winding the battery cells, and thus helping to improve the battery production efficiency.

[0171] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0172] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A needle pushing mechanism, applied to a winding device, characterized in that: include: A push-needle shaft, the push-needle shaft being provided with a connection end for connecting with the winding needle and being provided with an airway for communicating with the negative pressure chamber of the winding needle; A push-pin driving mechanism, the push-pin driving mechanism is used to drive the push-pin shaft to move, and is provided with a connecting structure for connecting to the main shaft of the winding device; The air passage extends along the axial direction of the push-pin shaft and is open at both ends of the push-pin shaft.

2. The needle pushing mechanism according to claim 1, characterized in that: A flange is provided at one end of the push-pin shaft, and the flange is used to be connected with the winding needle.

3. The needle pushing mechanism according to claim 1 or 2, characterized in that: The push pin driving mechanism comprises: A slide rail, wherein the slide rail is provided with the connecting structure; A sliding seat, the sliding seat is slidably matched with the slide rail, and the push pin shaft is installed on the sliding seat; A push pin driving member is connected to the sliding seat and is used for driving the sliding seat to slide.

4. The needle pushing mechanism according to claim 3, characterized in that: The slide rail comprises: A bottom plate, the bottom plate is provided with the connecting structure and the bottom plate is provided with weight-reducing holes; A plurality of tracks are arranged on the bottom plate at intervals, and the sliding seat is slidably matched with the plurality of tracks.

5. The needle pushing mechanism according to claim 3, characterized in that: Also includes: A support seat, the support seat is mounted on the sliding seat, and the push pin shaft is supported on the support seat; A rotating needle transmission member, the output end of which is connected to the push-pin shaft; A rotating needle driving member, wherein the output end of the rotating needle driving member is connected to the input end of the rotating needle transmission member.

6. The needle pushing mechanism according to claim 5, characterized in that: The push needle shaft comprises a plurality of sections which are sequentially connected along the axial direction and whose outer diameters gradually increase. The hose connected to the air pump, the output end of the rotating needle transmission member and the winding needle are respectively connected to different sections.

7. The needle pushing mechanism according to claim 5, characterized in that: The support seat is provided with a first bearing for supporting the push-pin shaft, and the first bearing is limited by a nut threadedly connected to the push-pin shaft.

8. A winding device, characterized in that: include: A winding needle, wherein the winding needle has a negative pressure chamber; According to any one of claims 1 to 7, the connecting end of the needle pushing shaft is connected to the winding needle, and the airway of the needle pushing shaft is connected to the negative pressure chamber.

9. The winding device according to claim 8, characterized in that Also includes: a first support member and a second support member, wherein the first support member and the second support member are spaced apart from each other; A main shaft, the main shaft is supported by the first support member and the second support member, the main shaft is used to drive the winding needle to rotate around the main shaft, and the needle pushing mechanism is installed on the main shaft.

10. The winding device according to claim 8 or 9, characterized in that The winding needle is mounted on the main shaft.

11. A battery production system, characterized in that: include: The winding device according to any one of claims 8 to 10; A conveying device, the conveying device is used to convey the pole piece and the diaphragm to the winding device; A pre-pressing device is used to pre-press the pole piece and the diaphragm after being wound by the winding device.

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