An electrode tab side edge insulation dispensing mechanism and a packaging device comprising the same

Abstract

The application discloses a kind of side edge insulation dispensing mechanism of pole piece and the packaging device comprising it, belong to pole piece packaging technical field, the dispensing mechanism includes glue cylinder, dispensing head, high pressure component and air pressure component, apply electrohydrodynamics to battery pole piece packaging field, so that under the driving of air pressure and the electrification of insulating material that is ejected by dispensing head, under the action of high voltage electric field force, glue jet is attenuated and elongated, and accurately acts on the side edge of pole piece, realizes the accurate control of glue output, to form dense and uniform insulating layer on the side edge of pole piece;The packaging device in the application includes dispensing mechanism, visual positioning mechanism, motion execution mechanism and curing mechanism, to carry out online correction for the jitter and offset generated during the tape running of pole piece, to avoid missing coating and wrong coating;By integrating curing mechanism, curing is carried out immediately after coating is completed, shorten the process flow, improve production efficiency, prevent unhardened glue from being wiped off or contaminated in subsequent transmission process.

Description

Technical Field

[0001] This invention belongs to the field of electrode packaging technology, specifically relating to an electrode side insulation dispensing mechanism and a packaging device containing the same. Background Technology

[0002] With the increasing global energy demand and growing environmental awareness, all-solid-state batteries (ASSBs) are widely recognized as a strong candidate for next-generation energy storage technology due to their significant advantages such as high energy density, high safety and long cycle life.

[0003] However, due to the inherent rigidity and brittleness of solid-state electrolyte materials, the electrodes of all-solid-state batteries are highly susceptible to cracking and debris formation under isostatic pressing and other processing conditions. Once these cracks and debris penetrate the electrolyte layer, they directly cause physical contact between the positive and negative electrodes, leading to severe internal short circuits. Furthermore, current solid-state batteries typically employ a method of coating the positive electrode with a solid electrolyte before assembling it with the negative electrode, retaining the traditional lithium-ion battery electrode manufacturing process where the negative electrode die-cutting area is larger than the positive electrode die-cutting area. However, burrs are formed at the electrode edges during die-cutting. The burrs on the smaller positive electrode edge directly overlap the negative electrode, leading to decreased battery insulation or a short-circuit risk. Short circuits not only degrade battery performance but can also trigger thermal runaway, fires, or even safety accidents.

[0004] To address the issue of burrs at the electrode edges, current technologies often employ adhesive coating equipment to apply adhesive to the sides of the electrode, aiming to achieve stable sealing without increasing the electrode edge thickness. However, the dispensing methods of existing coating equipment are prone to uneven adhesive layer thickness or volume control issues due to physical factors such as unstable air pressure and fluctuating dispensing speed. This not only wastes material but also increases the electrode volume, thereby affecting the energy density and overall assembly precision of the all-solid-state battery. Summary of the Invention

[0005] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides an electrode side insulation dispensing mechanism and an encapsulation device including the same, which can achieve precise control of the dispensing amount, save costs and reduce the volume of the encapsulated electrode.

[0006] To achieve the above objectives, one aspect of the present invention provides an electrode side insulation dispensing mechanism, which includes a glue tube, a dispensing head, a high-voltage component, and a pneumatic component. The glue cartridge is used to store insulating adhesive; the pneumatic assembly is connected to the glue cartridge and is used to provide pneumatic pressure to the glue cartridge; the dispensing head is made of conductive material; the high-voltage assembly is electrically connected to the dispensing head and is used to apply high voltage to the dispensing head to form a high-voltage electric field at the dispensing head; and the dispensing head is connected to the glue cartridge, and the insulating adhesive is sprayed out from the dispensing head and coated on the side of the electrode under the action of pneumatic pressure and high-voltage electric field.

[0007] As a further improvement of the present invention, the dispensing head includes a needle tip and an extension rod; one end of the extension rod is sealed and connected to the outlet of the glue tube, and the other end is detachably sealed and connected to the needle tip. The insulating adhesive in the glue tube flows to the needle tip via the extension rod and is sprayed out through the needle tip.

[0008] As a further improvement of the present invention, the inner diameter of the rubber tube is larger than the inner diameter of the extension rod, and the inner diameter of the extension rod is larger than the inner diameter of the needle tip.

[0009] As a further improvement of the present invention, a base is also included, the base being made of an insulating material and comprising a first support area for fixing and supporting the dispensing head and a second support area for fixing and supporting the glue cartridge.

[0010] As a further improvement of the present invention, a conductive ring is embedded in the inner side of the first support area, the dispensing head is inserted through and fixedly connected to the conductive ring, and the high voltage component is electrically connected to the conductive ring.

[0011] As a further improvement of the present invention, the inner side of the conductive ring has a gradually decreasing inner diameter structure from one end near the rubber tube to the other end along the axial direction, and the outer side of the extension rod has a variable diameter structure that is adapted to the inner surface of the conductive ring.

[0012] As a further improvement of the present invention, the high-voltage component includes a high-voltage wire, one end of which is connected to a high-voltage power supply, and the other end is electrically connected to the conductive layer and fixed to the base by a locking screw.

[0013] In another aspect, the present invention provides an electrode side insulation encapsulation device, including the electrode side insulation dispensing mechanism described above.

[0014] As a further improvement of the present invention, it also includes a motion execution mechanism, a visual positioning mechanism, and a fixing mechanism; The motion actuator is movable at least along the thickness and width directions of the electrode sheet, and the dispensing mechanism is disposed in the motion actuator; The visual positioning mechanism includes a first visual unit and a second visual unit, which are respectively used to collect the relative position information of the dispensing head and the side of the electrode in the thickness direction and the width direction; and the visual positioning mechanism is connected to the motion execution mechanism so as to control the motion execution mechanism to drive the dispensing mechanism to adjust its position when the relative position of the dispensing head and the side of the electrode in the thickness direction and / or the width direction exceeds a set threshold. The curing mechanism is used to cure the insulating adhesive applied to the side of the electrode.

[0015] As a further improvement of the present invention, it also includes an outer cover, wherein the visual positioning mechanism and / or the curing mechanism are disposed within the outer cover.

[0016] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0017] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include: (1) The electrode side insulation dispensing mechanism of the present invention applies electrohydrodynamics to the field of battery electrode packaging by setting a pneumatic component and a high-voltage component in the dispensing mechanism, so that the insulating adhesive sprayed by the dispensing head under the pneumatic drive is charged, so that the adhesive jet is stretched and elongated under the action of the high-voltage electric field and is precisely applied to the side of the electrode, thereby achieving precise control of the amount of adhesive dispensed, and thus forming a dense and uniform insulating layer on the side of the electrode.

[0018] (2) The electrode side insulation dispensing mechanism of the present invention sets the dispensing head as a separate structure of extension rod and needle tip, so as to facilitate maintenance and replacement. The needle tip, as a consumable part or a part to be replaced according to the coating line width, can be disassembled, cleaned or replaced independently without replacing the entire dispensing head, thus reducing the cost of use. At the same time, the design of the extension rod increases the length of the adhesive flow channel, which is conducive to a more stable flow of adhesive before entering the needle tip.

[0019] (3) The electrode side insulation dispensing mechanism of the present invention, by setting an insulating base, can effectively isolate high voltage while ensuring the fixed support of the dispensing mechanism, and prevent the high voltage generated by the high voltage component from being conducted to the outside, thus ensuring the safety of the equipment and operators; at the same time, by embedding a conductive ring on the inner side of the first support area, the conductive ring is used as the electrical connection medium between the high voltage line and the dispensing head, ensuring the contact stability and shock resistance of the electrical connection between the high voltage line and the dispensing head during the dispensing process, and avoiding the coating quality being affected by poor contact.

[0020] (4) The electrode side insulation packaging device of the present invention, by introducing a visual positioning mechanism and a motion execution mechanism, corrects the shaking and deviation of the electrode during the conveyor belt process online to avoid missed coating and incorrect coating; by integrating a curing mechanism, the coating is cured immediately after coating, which shortens the process flow, improves production efficiency, and prevents uncured adhesive from being rubbed off or contaminated during subsequent transmission.

[0021] (5) The electrode side insulation dispensing mechanism and the encapsulation device containing it of the present invention have a simple structure and reasonable settings, which can effectively improve the accuracy of electrode edge sealing, make the edge sealing adhesive layer more uniform, the surface quality better, the thickness control more precise, and greatly improve production efficiency and capacity. While improving the yield rate, it reduces material waste and is suitable for large-scale production. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional schematic diagram of the electrode side insulation dispensing mechanism in an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of the electrode side insulation encapsulation device in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the electrode side insulation encapsulation device in an embodiment of the present invention; In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Electrode; 2. Dispensing head; 201. Needle tip; 202. Extension rod; 3. Base; 301. First support area; 302. Conductive ring; 303. Second support area; 304. First locking knob; 305. Locking screw; 306. Second locking knob; 4. High-voltage wire; 5. Glue tube; 6. Outer cover; 7. First vision unit; 8. Second vision unit; 9. Curing mechanism; 10. Motion actuator. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0025] In the description of this invention, it should be understood that, unless otherwise expressly specified and limited, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0026] Furthermore, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] Example: Please see Figures 1-3In a preferred embodiment of the present invention, the electrode side insulation dispensing mechanism includes a dispensing mechanism, which includes a dispensing head 2, a glue cylinder 5, a high-voltage component and a pneumatic component (not shown in the figure), so that the liquid insulating material stored in the glue cylinder 5 is sprayed out through the dispensing head 2 under the action of the pneumatic component, and under the action of the high-voltage electric field provided by the high-voltage component, the sprayed insulating material is accurately deposited onto the side edge of the electrode 1.

[0030] Specifically, in the preferred embodiment, the glue cylinder 5 is made of insulating material and is used to store insulating glue to be used. One end of the glue cylinder 5 is connected to a pneumatic assembly to apply air pressure to the glue cylinder 5 through the pneumatic assembly.

[0031] Preferably, one end of the rubber cylinder 5 is provided with a feed port for filling the rubber into the rubber cylinder 5, and the other end is provided with a discharge port for discharging the rubber.

[0032] Furthermore, in the preferred embodiment, the dispensing head 2 is made of conductive material and is connected to the glue cartridge 5, so that the insulating glue in the glue cartridge 5 is sprayed out through the dispensing head 2 under air pressure.

[0033] Preferably, such as Figure 1 As shown, the dispensing head 2 includes a needle tip 201 and an extension rod 202. One end of the extension rod 202 is sealed and connected to the outlet of the glue cartridge 5, and the other end is detachably sealed and connected to the needle tip. The insulating adhesive in the glue cartridge 5 flows to the needle tip 201 via the extension rod 202 and is sprayed out through the needle tip 201. The needle tip 201 is a replaceable part, and needle tips of different diameters and / or different lengths can be selected and replaced according to process requirements.

[0034] Preferably, the inner diameter of the glue cartridge 5 is larger than the inner diameter of the extension rod 202, and the inner diameter of the extension rod 202 is larger than the inner diameter of the needle tip 201, forming a gradually decreasing glue dispensing channel, which increases the glue flow rate and achieves micro-precision glue dispensing; at the same time, multi-stage throttling buffer suppresses air pressure fluctuations, ensuring uniform coating thickness, and in conjunction with the electric field to enhance the tip effect, improves coating directionality and edge alignment accuracy.

[0035] Preferably, a base 3 is also provided within the dispensing mechanism to provide fixed support for the dispensing head 2 and the glue cartridge 5. Figure 1 As shown, in the preferred embodiment, the base 3 includes a first support area 301 for fixing and supporting the dispensing head 2 and a second support area 303 for fixing and supporting the dispensing cylinder 5. The base 3 is made of insulating material to isolate the electric field of the high-voltage components and prevent operators from accidentally touching the dispensing head 2.

[0036] Furthermore, in the preferred embodiment, the high-voltage component includes a high-voltage wire 4, one end of which is connected to a high-voltage power supply, and the other end is electrically connected to the dispensing head 2 to apply high voltage to the needle tip 201 and form a high-voltage electric field at the needle tip 201.

[0037] Preferably, a conductive ring 302 is embedded in the inner side of the first support area 301, and the dispensing head 2 is inserted through and fixedly connected to the conductive ring 302; correspondingly, the high-voltage line 4 is electrically connected to the conductive ring 302, thereby realizing the electrical connection between the dispensing head 2 and the high-voltage component.

[0038] Preferably, the inner side of the conductive ring 302 has a variable diameter structure, specifically, the inner diameter gradually decreases from one end near the glue tube 5 to the other end along its axial direction, such as a conical structure or a stepped decreasing structure; correspondingly, the outer side of the extension rod 202 is set as a variable diameter structure adapted to the inner surface of the conductive ring 302 to provide a larger contact area and radial clamping force, ensuring that high voltage is efficiently transmitted from the conductive ring 302 to the extension rod 202 and the needle tip 201, preventing loose electrical contact between the dispensing head 2 and the conductive ring 302 during the glue application process, and avoiding voltage instability caused by poor contact.

[0039] Preferably, such as Figure 1 As shown, the extension rod 202 is locked inside the conductive ring 302 by the first locking knob 304, the end of the high voltage line 4 near the extension rod 202 is fixed to the base 3 by the locking screw 305, and the glue tube 5 is locked and fixed to the base 3 by the second locking knob 306. This prevents the glue dispensing head 2, the high voltage line 4 and the glue tube 5 from shifting or shaking during the glue application process, ensuring that the high voltage conductive contact is tight and reliable, thereby ensuring the stability of fluid transportation and electric field application, and improving the glue application accuracy and yield.

[0040] Furthermore, the present invention also relates to an electrode side insulation encapsulation device, which includes the above-mentioned dispensing mechanism.

[0041] Preferably, such as Figure 3 As shown, the electrode side insulation encapsulation device in the preferred embodiment of the present invention further includes a motion actuator 10, and a dispensing mechanism is disposed on the motion actuator 10 so as to drive the dispensing mechanism to move through the motion actuator 10 and adjust the dispensing position of the needle tip 201 relative to the electrode 1.

[0042] Specifically, the motion actuator 10 includes at least a first moving module and a second moving module, wherein the output end of the first moving module can move along the X direction, and the output end of the second moving module can move along the Y direction; in one specific embodiment of the present invention, the second moving module is disposed at the output end of the first moving module, and the base 3 is disposed at the output end of the second moving module; in another specific embodiment of the present invention, the first moving module is disposed at the output end of the second moving module, and the base 3 is disposed at the output end of the first moving module.

[0043] It should be noted that in the preferred embodiment of the present invention, the X direction is the thickness direction of the electrode 1, and the Y direction is the width direction of the electrode 1.

[0044] More preferably, the motion actuator 10 further includes a rotating module to adjust the dispensing angle of the dispensing mechanism relative to the side edge of the electrode 1.

[0045] Preferably, such as Figure 2 As shown, the electrode side insulation encapsulation device in the preferred embodiment of the present invention further includes a curing mechanism 9, which is used to cure the adhesive applied to the edge of the electrode 1 to form an edge sealing adhesive layer.

[0046] In a specific embodiment of the present invention, the insulating adhesive is a UV adhesive, and the curing mechanism 9 includes at least one UV lamp to cure the UV adhesive by ultraviolet irradiation.

[0047] Preferably, such as Figure 2 and Figure 3 As shown, the electrode side insulation encapsulation device in the preferred embodiment of the present invention further includes a visual positioning mechanism for acquiring relative positional information between the dispensing mechanism and the edge of the electrode 1; as shown Figure 2 In the preferred embodiment shown, the visual positioning mechanism includes a first visual unit 7 and a second visual unit 8; wherein, the first visual unit 7 is used to collect the distance between the needle tip 201 and the side of the electrode 1 in the X direction, and the second visual unit 8 is used to collect the distance between the needle tip 201 and the side of the electrode 1 in the Y direction.

[0048] At the same time, the visual positioning mechanism is connected to the motion execution mechanism 10 so that when the distance between the needle tip 201 and the side of the electrode 1 in the X and / or Y directions exceeds the set threshold, the motion execution mechanism 10 is controlled to move the dispensing mechanism and adjust the position of the needle tip 201 to within the set threshold.

[0049] Preferably, the electrode side insulation dispensing mechanism in the preferred embodiment of the present invention further includes an outer cover 6, wherein at least the visual positioning mechanism and the curing mechanism 9 are disposed inside the outer cover 6 to eliminate the interference of ambient light on the visual positioning mechanism, ensure the detection accuracy and response speed of the visual positioning mechanism, and at the same time prevent the high-energy ultraviolet light of the UV lamp from scattering to the outside of the device, avoid ultraviolet rays causing personal injury to the operator, and prevent ultraviolet rays from irradiating and aging other external components of the equipment.

[0050] Furthermore, the usage process of the electrode insulating encapsulation device in the above preferred embodiment of the present invention is as follows: (1) The visual positioning mechanism detects the distance between the needle tip 201 and the edge of the electrode 1 in the X and Y directions. The motion execution mechanism 10 drives the dispensing mechanism to move, so that the needle tip 201 is aligned with the edge of the electrode 1 and the distance between the needle tip 201 and the edge of the electrode 1 is kept within the set threshold range. (2) During the tape-carrying process of electrode 1, the air pressure component applies pressure to the glue cylinder 5, pushing the insulating adhesive in the glue cylinder 5 into the dispensing head 2; at the same time, the high voltage component applies voltage to the dispensing head 2, causing the insulating adhesive in the dispensing head 2 to be sprayed out and precisely deposited on the edge of electrode 1 under the action of air pressure and high voltage electric field. (3) When the electrode 1 with the deposited insulating adhesive, i.e. UV adhesive, passes through the curing mechanism 9, it is cured under the irradiation of UV lamp to form an edge sealing adhesive layer, thus completing the insulation encapsulation of the side edge of the electrode 1.

[0051] The electrode side insulation dispensing mechanism and the encapsulation device containing it in this invention have a wide range of material adaptability, chemical compatibility, diverse material types, and wide application fields.

[0052] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dispensing mechanism for insulating the side of an electrode sheet, characterized in that, Including the dispensing mechanism; The dispensing mechanism includes a glue cylinder, a dispensing head, a high-voltage component, and a pneumatic component; the glue cylinder is used to store insulating adhesive; the pneumatic component is connected to the glue cylinder and is used to provide air pressure to the glue cylinder; The dispensing head is made of conductive material; the high-voltage component is electrically connected to the dispensing head and is used to apply high voltage to the dispensing head to form a high-voltage electric field at the dispensing head; and the dispensing head is connected to the glue tube, and the insulating adhesive is sprayed out from the dispensing head and coated on the side of the electrode under the action of air pressure and high-voltage electric field.

2. The electrode side insulation dispensing mechanism according to claim 1, characterized in that, The dispensing head includes a needle tip and an extension rod; one end of the extension rod is sealed and connected to the outlet of the glue tube, and the other end is detachably sealed and connected to the needle tip. The insulating glue in the glue tube flows to the needle tip via the extension rod and is sprayed out through the needle tip.

3. The electrode side insulation dispensing mechanism according to claim 2, characterized in that, The inner diameter of the rubber tube is larger than the inner diameter of the extension rod, and the inner diameter of the extension rod is larger than the inner diameter of the needle tip.

4. The electrode side insulation dispensing mechanism according to any one of claims 1 to 3, characterized in that, It also includes a base made of insulating material, comprising a first support area for fixing and supporting the dispensing head and a second support area for fixing and supporting the glue cartridge.

5. The electrode side insulation dispensing mechanism according to claim 4, characterized in that, A conductive ring is embedded in the inner side of the first support area, the dispensing head is inserted through and fixedly connected to the conductive ring, and the high voltage component is electrically connected to the conductive ring.

6. The electrode side insulation dispensing mechanism according to claim 5, characterized in that, The inner side of the conductive ring has a gradually decreasing inner diameter structure along the axial direction from one end near the rubber tube to the other end, and the outer side of the extension rod has a variable diameter structure that matches the inner surface of the conductive ring.

7. The electrode side insulation dispensing mechanism according to claim 5, characterized in that, The high-voltage component includes a high-voltage wire, one end of which is connected to a high-voltage power supply, and the other end is electrically connected to the conductive layer and fixed to the base by a locking screw.

8. A side-insulating encapsulation device for an electrode sheet, characterized in that, The electrode side insulation dispensing mechanism includes any one of claims 1 to 7.

9. The electrode side insulation encapsulation device according to claim 8, characterized in that, It also includes motion actuators, visual positioning mechanisms, and fixing mechanisms; The motion actuator is movable at least along the thickness and width directions of the electrode sheet, and the dispensing mechanism is disposed in the motion actuator; The visual positioning mechanism includes a first visual unit and a second visual unit, which are respectively used to collect the relative position information of the dispensing head and the side of the electrode in the thickness direction and the width direction; and the visual positioning mechanism is connected to the motion execution mechanism so as to control the motion execution mechanism to drive the dispensing mechanism to adjust its position when the relative position of the dispensing head and the side of the electrode in the thickness direction and / or the width direction exceeds a set threshold. The curing mechanism is used to cure the insulating adhesive applied to the side of the electrode.

10. The electrode side insulation encapsulation device according to claim 9, characterized in that, It also includes an outer cover, and the visual positioning mechanism and / or the curing mechanism are disposed inside the outer cover.

Images