Vacuum-sealed suction nozzle and vacuum-sealed device

Abstract

The present disclosure provides a kind of vacuum sealing suction nozzle and vacuum sealing device, it is related to battery manufacturing technical field.The vacuum sealing suction nozzle includes sealing element and one-way valve, sealing element is formed with the containing space with one open end, and the connecting hole communicated with the containing space;The part of sealing element around open end is used to seal adsorption with target contact surface;One-way valve has air inlet and air outlet, air inlet is communicated with connecting hole, and air outlet is used to connect vacuum equipment;The vacuum sealing suction nozzle provided by the present disclosure can improve the product yield of single battery.

Description

Technical Field

[0001] This disclosure relates to the field of battery manufacturing technology, and more specifically, to a vacuum sealing nozzle and a vacuum sealing device. Background Technology

[0002] Secondary batteries, also known as rechargeable batteries or storage batteries, are batteries that can be recharged after being discharged, allowing the active materials to be reactivated and reused. The recyclable nature of secondary batteries has made them a primary power source for electrical equipment.

[0003] During battery production, after the structural components of the battery are assembled, electrolyte needs to be injected into the electrode assembly inside the casing through the injection hole on the top cover assembly. However, during the electrolyte injection process, electrolyte may overflow from the injection hole. The overflowing electrolyte spreads on the top cover assembly and can cause corrosion to some components of the top cover assembly.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this disclosure is to provide a vacuum sealing nozzle and a vacuum sealing device that can improve the product yield of single-cell batteries.

[0006] According to one aspect of this disclosure, a vacuum sealing nozzle is provided, the vacuum sealing nozzle comprising: A sealing element having a receiving space with an open end and a connection hole communicating with the receiving space; a portion of the sealing element surrounding the open end is used for sealing and adsorption with a target contact surface; A one-way valve has an air inlet and an air extraction port. The air inlet is connected to the connecting hole, and the air extraction port is used to connect to a vacuum pumping device.

[0007] In one exemplary embodiment of this disclosure, the seal includes a receiving portion and an adsorption portion. The receiving portion is formed with the receiving space and the connecting hole. The adsorption portion is connected to the receiving portion and surrounds the opening of the receiving space. The side of the adsorption portion away from the receiving portion forms the open end.

[0008] In one exemplary embodiment of this disclosure, the size of the adsorption portion increases in the direction away from the receiving portion.

[0009] In one exemplary embodiment of this disclosure, the open end formed by the adsorption portion is circular.

[0010] In one exemplary embodiment of this disclosure, the receiving portion is cylindrical, and / or the adsorption portion is frustum-shaped.

[0011] In one exemplary embodiment of this disclosure, the receiving portion is made of a rigid material, and / or the adsorption portion is made of a flexible material.

[0012] In one exemplary embodiment of this disclosure, the adsorption part is made of rubber.

[0013] In one exemplary embodiment of this disclosure, the one-way valve includes: The valve body has an air extraction channel, and the air extraction channel has an air inlet and an air extraction outlet at its two ends. The air extraction channel includes a first section near the air inlet and a second section near the air extraction outlet, and the second section is larger than the first section. A valve core and an elastic element are located in the air extraction channel. One end of the elastic element is connected to the end of the valve body near the air extraction port, and the other end is connected to the valve core. Specifically, when the air pressure on the side of the valve core near the air extraction port is greater than the air pressure on the side near the air inlet, the valve core can be located in the first section of the air extraction channel and make sealing contact with the side wall of the first section; when the air pressure on the side of the valve core near the air extraction port is less than the air pressure on the side near the air inlet, the valve core can compress the elastic element to move into the second section of the air extraction channel, and there is a gap between the valve core and at least a portion of the side wall of the second section.

[0014] In one exemplary embodiment of this disclosure, a guide structure is provided in the second section of the air extraction channel, the guide structure being used to guide the valve core to move between the first section and the second section of the air extraction channel.

[0015] In one exemplary embodiment of this disclosure, the elastic element is a spring.

[0016] According to one aspect of this disclosure, a vacuum sealing device is provided, the vacuum sealing device comprising: The aforementioned vacuum sealing nozzle; A robotic arm, used to move the vacuum sealing nozzle to the target contact surface; A vacuuming device is used to evacuate the vacuum sealing nozzle that has been moved to the target contact surface through the air extraction port, so that the vacuum sealing nozzle is adsorbed onto the target contact surface.

[0017] The vacuum sealing nozzle disclosed herein allows for the installation of a vacuum sealing nozzle on the terminal assembly of a single battery cell before electrolyte injection. The nozzle accommodates the portion of the terminal assembly protruding from the aluminum sheet, thus covering this portion. Next, a vacuum device is connected to the suction port of a one-way valve. The vacuum device generates negative pressure through the suction port. At this time, the air pressure on the inlet side (accommodation space side) of the one-way valve is higher than that on the suction port side. The one-way valve opens, drawing gas from the accommodation space of the sealing element, creating a negative pressure in the accommodation space relative to the external environment of the sealing element. This causes the portion of the sealing element surrounding the open end to adhere tightly to the aluminum sheet under external pressure, achieving a sealed contact with the aluminum sheet. Due to the one-way valve, when the vacuum equipment stops working, the air pressure on the suction port side of the one-way valve is higher than that on the inlet side. At this time, the one-way valve automatically closes, forming a reverse seal, effectively preventing outside air from entering the containment space. Therefore, the containment space can be maintained in a negative pressure state, allowing the seal to continuously adhere to the aluminum sheet, thus maintaining complete isolation between the area where the electrode assembly is located and the area where the electrolyte injection hole is located. Therefore, when electrolyte is subsequently injected into the cell through the injection hole, the electrolyte overflowing from the injection hole and spreading towards the electrode assembly is blocked by the seal, completely preventing electrolyte from flowing into the assembly gap between the electrode assembly and the aluminum sheet. This improves the product yield and safety of the individual cells.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0020] Figure 1 This is a schematic diagram of a single battery cell provided in one embodiment of the present disclosure.

[0021] Figure 2 An exploded view of a single cell provided in one embodiment of this disclosure.

[0022] Figure 3 This is a schematic diagram of a top cover assembly provided in one embodiment of the present disclosure.

[0023] Figure 4 This is a schematic diagram of a vacuum sealing nozzle adsorbed onto a light aluminum sheet, according to one embodiment of the present disclosure.

[0024] Figure 5 This is a schematic diagram of a vacuum sealing nozzle provided in one embodiment of the present disclosure.

[0025] Figure 6 This is a bottom schematic diagram of a vacuum sealing nozzle provided in one embodiment of the present disclosure.

[0026] Figure 7 An exploded view of a vacuum sealing nozzle provided in one embodiment of this disclosure.

[0027] Figure 8 A side view of a vacuum sealing nozzle provided in one embodiment of this disclosure.

[0028] Figure 9 This is a schematic diagram showing a vacuum sealing nozzle in a sealed state, according to an embodiment of the present disclosure.

[0029] Figure 10 This is a schematic diagram of a vacuum sealing nozzle in a vacuuming state, provided for one embodiment of the present disclosure.

[0030] Figure label: 10. Single cell; 11. Top cover assembly; 12. Housing; 13. Electrode assembly; 111. Aluminum sheet; 112. Lower plastic; 113. Injection hole; 1141. First terminal; 1142. Second terminal; 1151. First upper plastic; 1152. Second upper plastic; 116. Explosion-proof valve; 20. Vacuum sealing nozzle; 21. Sealing element; 211. Receiving part; 212. Adsorption part; 213. Receiving space; 214. Connection hole; 22. One-way valve; 221. Valve body; 222. Valve core; 223. Elastic element; 224. Air extraction port; 225. Air inlet; 226. Air extraction channel; 2261. First section; 2262. Second section. Detailed Implementation

[0031] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0032] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0033] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0034] like Figures 1-3 As shown, the single cell 10 includes: a top cover assembly 11, a housing 12 and an electrode assembly 13. The electrode assembly 13 is disposed in the housing 12 to form an installation space, and the top cover assembly 11 covers the opening of the housing 12.

[0035] The electrode assembly 13 includes a battery cell, a positive electrode tab, and a negative electrode tab. The battery cell has positive and negative electrode plates stacked on top of each other, and a separator sheet disposed between the positive and negative electrode plates. The positive and negative electrode plates, as well as the separator sheet disposed between them, are wound together to obtain a wound battery cell. The battery cell can be a stacked, laminated battery cell.

[0036] The top cover assembly 11 includes an aluminum sheet 111, a first electrode post 1141, a first upper plastic 1151, a second electrode post 1142, a second upper plastic 1152, and a lower plastic 112. The aluminum sheet 111 and the lower plastic 112 have through holes in the first electrode post 1141 and the second electrode post 1142, respectively. The first electrode post 1141 passes through the hole in the first electrode post 1141, and the second electrode post 1142 passes through the hole in the second electrode post 1142. The first upper plastic 1141... 151 is located on the top surface of the aluminum sheet 111 and between the first electrode post 1141 and the aluminum sheet 111, serving to insulate the aluminum sheet 111 from the first electrode post 1141; the second upper plastic 1152 is located on the top surface of the aluminum sheet 111 and between the second electrode post 1142 and the aluminum sheet 111, serving to insulate the aluminum sheet 111 from the second electrode post 1142; the lower plastic 112 is stacked on the back side of the aluminum sheet 111, serving to insulate the aluminum sheet 111 from the electrode assembly 13. The first electrode post 1141 and the second electrode post 1142 have opposite polarities; for example, the first electrode post 1141 can be a positive electrode post, and the second electrode post 1142 can be a negative electrode post.

[0037] The top cover assembly 11 also includes multiple adapter pieces, each including at least one positive adapter piece and at least one negative adapter piece; the positive tab of each cell is electrically connected to the positive terminal through the positive adapter piece, and the negative tab of each cell is electrically connected to the negative terminal through the negative adapter piece.

[0038] The top cover is equipped with an explosion-proof hole, and an explosion-proof valve 116 is installed on the explosion-proof hole. The explosion-proof valve 116 can be installed on the explosion-proof hole by welding or other means, or by forming a groove on the top cover, with the part surrounded by the groove serving as the explosion-proof valve 116; when the gas pressure inside the single cell 10 exceeds a set critical value, the explosion-proof valve 116 opens to release gas, so as to prevent the gas pressure inside the single cell 10 from becoming too high and causing an explosion.

[0039] The single-cell battery 10 can be, but is not limited to, at least one of square, cylindrical, prismatic, or other shaped batteries. The single-cell battery 10 can be a rechargeable battery, meaning it can be reused after being discharged by recharging to activate the active materials. The single-cell battery 10 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this disclosure does not specifically limit its use. Below, this disclosure uses a square battery cell as an example for illustrative explanation.

[0040] Currently, in order to enable the active materials of the single cell 10 to be activated and used again after discharge by recharging, the electrode assembly 13 inside the casing 12 is immersed in the electrolyte, and the transfer of ions is achieved through the electrolyte. Therefore, during the manufacturing process of the single cell 10, after the structural assembly of the single cell 10 is completed, electrolyte needs to be injected into the cell inside the casing 12 through the injection hole 113 on the top cover assembly 11; during the process of injecting electrolyte into the cell, a positive and negative pressure circulation method is usually adopted to force the electrolyte into the cell.

[0041] However, electrolyte overflow may occur the moment the injection nozzle is removed after the injection is completed. Currently, the top cover assembly 11 is assembled by creating grooves in the aluminum sheet 111 to mate with the first upper plastic 1151 and the second upper plastic 1152. Considering dimensional tolerances, there is an assembly gap between the grooves on the aluminum sheet 111 and the first and second upper plastics 1151 and 1152. Therefore, when the electrolyte overflowing from the injection hole 113 diffuses to the first and second upper plastics 1151 and 1152, it flows into the gap between the first and second upper plastics 1151 and the aluminum sheet 111. Neither mechanical nor manual methods can completely remove the electrolyte from this gap. When the electrolyte in the gap comes into contact with moisture in the air, it produces hydrofluoric acid. This hydrofluoric acid corrodes the aluminum sheet 111, producing white crystals, which affects the shipment of the individual cells 10 and leads to a decrease in product yield.

[0042] To address this, the present disclosure provides a vacuum sealing nozzle, such as... Figures 4-6 As shown, the vacuum sealing nozzle 20 includes a seal 21 and a one-way valve 22. The seal 21 forms a receiving space 213 with an open end and a connecting hole 214 communicating with the receiving space 213. The portion of the seal 21 surrounding the open end is used for sealing and adsorption with the target contact surface. The one-way valve 22 has an air inlet 225 and an air extraction port 224. The air inlet 225 communicates with the connecting hole 214, and the air extraction port 224 is used to connect to a vacuum device.

[0043] The vacuum sealing nozzle 20 provided in this disclosure allows for the placement of a vacuum sealing nozzle 20 on the first electrode post 1141 and the second electrode post 1142 of the single cell 10 before electrolyte injection. The nozzle 20 is accommodated by a receiving space 213 to accommodate the portion protruding from the aluminum sheet 111, thereby covering the first electrode post 1141 and the first upper plastic 1151 in the receiving space 213 of a sealing member 21, and covering the second electrode post 1142 and the second upper plastic 1152 in the receiving space 213 of another sealing member 21. Next, by connecting the one-way valve 22 to the vacuum equipment, the vacuum equipment generates negative pressure through the suction port 224. At this time, the air pressure on the side of the air inlet 225 (the side of the accommodating space 213) of the one-way valve 22 is higher than that on the side of the suction port 224. The one-way valve 22 opens and extracts the gas from the accommodating space 213 of the sealing member 21, so that the accommodating space 213 is under negative pressure relative to the external environment of the sealing member 21. This allows the part of the sealing member 21 surrounding the open end to be tightly adsorbed onto the light aluminum sheet 111 under the action of external pressure, thus achieving a sealed contact with the light aluminum sheet 111. Due to the one-way valve 22, when the vacuum equipment stops working, the air pressure on the suction port 224 side of the one-way valve 22 is higher than that on the inlet port 225 side. At this time, the one-way valve 22 automatically closes, forming a reverse seal, effectively preventing outside air from entering the containment space 213. Therefore, the containment space 213 can be maintained in a negative pressure state, so that the sealing element 21 can be continuously adsorbed on the aluminum sheet 111, continuously forming a complete isolation between the area where the upper plastic is set and the area where the injection hole 113 is set on the aluminum sheet 111. Therefore, when electrolyte is subsequently injected into the cell, the electrolyte overflowing from the injection hole 113 and spreading towards the first upper plastic 1151 and the second upper plastic 1152 will be blocked by the sealing element 21, completely preventing the electrolyte from flowing into the assembly gap between the first upper plastic 1151 and the second upper plastic 1152 and the aluminum sheet 111, thereby improving the product yield of the single cell and enhancing the safety of the single cell. In addition, the vacuum sealing nozzle 20 can be used multiple times to repeatedly seal the terminal regions of different individual cells 10 when injecting electrolyte into the cell.

[0044] In some embodiments, such as Figures 5-7As shown, the sealing element 21 includes a receiving portion 211 and an adsorption portion 212. The receiving portion 211 forms a receiving space 213 and a connecting hole 214. The adsorption portion 212 is connected to the receiving portion 211 and surrounds the opening of the receiving space 213. The side of the adsorption portion 212 away from the receiving portion 211 forms an open end. The separate design of the receiving portion 211 and the adsorption portion 212 enables the sealing element 21 to achieve a division of labor between the receiving function and the sealing adsorption function. The structural design of each part can be independently optimized according to functional requirements, thereby significantly improving the overall performance of the sealing element 21. Since the receiving portion 211 does not need to directly contact the aluminum sheet 111, the receiving portion 211 can be made of a material with stronger rigidity and better dimensional stability, ensuring that the shape and volume of the receiving space 213 are not easily deformed during use and maintain a stable volume. Since the adsorption portion 212 directly contacts the aluminum sheet 111, its structural design can focus more on improving sealing performance and contact adaptability. For example, parameters such as the thickness and hardness of the adsorption portion 212 can be adjusted according to the characteristics of the aluminum sheet 111.

[0045] In particular, the size of the adsorption part 212 increases in the direction away from the receiving part 211, meaning that the adsorption part 212 can have a flared structure in the shape of a trumpet, which increases the sealing contact area with the aluminum sheet 111. Under the same pressure conditions, the larger the contact area, the easier it is to ensure the integrity of the sealing boundary. Even if there are minor scratches or dents on the target contact surface, the larger contact area can reduce the probability of electrolyte leakage from local gaps and maintain the sealing effect. At the same time, during the vacuuming process, the pressure of the external atmospheric pressure on the adsorption part 212 mainly acts on its outer peripheral area. The outer peripheral part of the flared structure, due to its larger size, can withstand greater pressure and fit tightly against the contact surface, ensuring that the sealing boundary always maintains a reliable sealing pressure. In addition, when the adsorption part 212 is aligned with the electrode area on the aluminum sheet 111, the open end of the flared structure forms a trumpet-shaped guide area. Even if there is a slight deviation in the positioning of the operator or automated equipment, the trumpet structure can absorb the deviation, aligning the open end of the adsorption part 212 with the target area, which can reduce the requirements for equipment positioning accuracy and improve production efficiency.

[0046] Among them, such as Figure 6 As shown, the open end of the adsorption section 212 can be circular. When the adsorption section 212 is bonded to the aluminum sheet 111, the circumferential sealing boundary can withstand uniform pressure. During the vacuuming process, the pressure of the external atmospheric pressure on the adsorption section 212 is uniformly transmitted along the circumference of the circular open end, avoiding the pressure concentration phenomenon that may occur at non-circular open ends; the uniform pressure distribution ensures that every part of the sealing boundary can be tightly bonded to the aluminum sheet 111, eliminating the risk of local leakage caused by uneven pressure.

[0047] Among them, such as Figure 7 and Figure 8As shown, the receiving portion 211 can be cylindrical. During the vacuuming process, the receiving portion 211 needs to withstand the pressure difference between the internal negative pressure and the external atmospheric pressure. The cylindrical structure can evenly distribute the pressure across the entire sidewall, maintaining shape stability even under high negative pressure conditions, ensuring that the volume of the receiving space 213 remains unchanged. Meanwhile, the pole is typically cylindrical or prismatic. The cylindrical receiving portion 211 can better match the pole, accommodating the pole while preventing the receiving space 213 formed by the receiving portion 211 from becoming too large, thus improving the efficiency of vacuuming the receiving space 213.

[0048] Among them, such as Figure 7 and Figure 8 As shown, the adsorption part 212 can be frustum-shaped. The dimensions of the frustum-shaped structure increase linearly, which allows the wall thickness and rigidity of the adsorption part 212 to vary uniformly along the axial direction, thereby achieving a linear distribution of sealing pressure. When bonded to the aluminum sheet 111, the open end of the frustum-shaped adsorption part 212 can provide a larger contact area and sealing pressure. Meanwhile, the electrode post and the upper plastic are typically cylindrical or prismatic, and the frustum-shaped receiving part 211 can better match the electrode post and the upper plastic, achieving a better fit around the electrode post and the upper plastic while avoiding an excessively large space formed by the adsorption part 212, thus improving the efficiency of vacuuming the receiving space 213.

[0049] The adsorption part 212 can be made of a flexible material. Flexible materials (such as rubber, silicone, flexible plastics, etc.) have good elasticity and deformation capabilities, enabling them to fit tightly against the target contact surface and significantly improve sealing reliability. When the adsorption part 212 contacts the target contact surface, the flexible material can fill the microscopic unevenness of the contact surface through its own deformation, eliminating sealing gaps and forming a gapless seal. In contrast, the adsorption part 212 made of rigid material cannot adapt to the unevenness of the contact surface and is prone to local leakage. At the same time, when the adsorption part 212 contacts the aluminum sheet 111, the flexible adsorption part 212 will undergo elastic deformation, absorbing the impact force during the contact process and reducing the pressure on the surface of the aluminum sheet 111, thereby protecting the aluminum sheet 111 from being scratched or deformed. In addition, the adsorption part 212 made of flexible materials such as rubber, silicone, and flexible plastics has good aging resistance and corrosion resistance, enabling it to work stably for a long time in the complex environment of battery cell production and resisting the erosion of electrolyte.

[0050] The receiving portion 211 can be made of a rigid material. Rigid materials (such as rigid plastics or metals) have high strength and low deformation characteristics, ensuring that the receiving portion 211 maintains structural stability and dimensional accuracy under various working conditions. During the vacuuming process, the receiving portion 211 needs to withstand the pressure difference between the internal negative pressure and the external atmospheric pressure; the rigid material can effectively resist the deformation caused by this pressure difference. Furthermore, as an intermediate component connecting the adsorption portion 212 and the one-way valve 22, the receiving portion 211 needs to achieve a reliable connection with both; the rigidity of the rigid material provides a stable connection foundation. When connected to the one-way valve 22, the rigid material ensures the positional and dimensional accuracy of the connection hole 214, allowing the air inlet 225 of the one-way valve 22 to precisely align with the connection hole 214, ensuring the smooth flow of the suction channel 226. It is understood that the receiving portion 211 and the adsorption portion 212 can be a single-piece molded structure, and the materials can be the same or different.

[0051] In some embodiments, such as Figure 7 As shown, the one-way valve 22 includes a valve body 221, a valve core 222, and an elastic element 223. The valve body 221 forms an air extraction channel 226, with an air inlet 225 and an air extraction port 224 at both ends. The air extraction channel 226 includes a first section 2261 near the air inlet 225 and a second section 2262 near the air extraction port 224, with the second section 2262 being larger than the first section 2261. The valve core 222 and the elastic element 223 are located within the air extraction channel 226. One end of the elastic element 223 is connected to the end of the valve body 221 near the air extraction port 224, and the other end is connected to the valve core 222. Wherein, as... Figure 9 As shown, when the air pressure on the side of valve core 222 near the suction port 224 is greater than the air pressure on the side near the air inlet 225, valve core 222 can be located in the first section 2261 of suction channel 226 and make sealing contact with the side wall of the first section 2261; as Figure 10 As shown, when the air pressure on the side of the valve core 222 near the air extraction port 224 is less than the air pressure on the side near the air inlet 225, the valve core 222 can compress the elastic element 223 to move into the second section 2262 of the air extraction channel 226, and there is a gap between it and at least part of the sidewall of the second section 2262.

[0052] When the air pressure on the side of the valve core 222 near the air extraction port 224 is less than the air pressure on the side near the air inlet 225 (i.e., in a vacuum state), the thrust generated by the air pressure difference overcomes the elastic force of the elastic element 223, pushing the valve core 222 towards the air extraction port 224, compressing the elastic element 223 and entering the second section 2262; at this time, there is a gap between the valve core 222 and the side wall of the second section 2262, the air extraction channel 226 is opened, and the gas in the accommodating space 213 is extracted through the one-way valve 22, forming a negative pressure in the accommodating space 213, so that the adsorption part 212 is tightly adsorbed on the light aluminum sheet 111. This pressure response has precise threshold control characteristics. By adjusting the elastic force of the elastic element 223 (for example, by selecting springs with different stiffness), the opening pressure threshold of the one-way valve 22 can be set. The one-way valve 22 will only open when the air pressure difference reaches the threshold, avoiding false opening caused by small pressure fluctuations. At the same time, the movement distance of the valve core 222 is proportional to the air pressure difference. The greater the air pressure difference, the greater the movement distance of the valve core 222, the larger the gap, and the higher the fluid conduction efficiency, thus realizing the function of pressure adaptive regulation.

[0053] When the air pressure on the side of the valve core 222 near the suction port 224 is greater than the air pressure on the side near the air inlet 225 (i.e., vacuuming stops), the elastic force of the elastic element 223 pushes the valve core 222 towards the air inlet 225, eventually placing the valve core 222 in the first section 2261 and sealing it against the side wall of the first section 2261, thus closing the suction channel 226. By constantly applying a spring force to the valve core 222 towards the air inlet 225 through the elastic element 223, it is ensured that the valve core 222 always maintains a sealed contact with the side wall of the first section 2261 when there is no air pressure difference or a reverse air pressure difference, without loosening or leakage. This allows the accommodating space 213 to be continuously maintained in a negative pressure state, thereby allowing the adsorption part 212 to continuously adsorb onto the light aluminum sheet 111.

[0054] The elastic element 223 not only provides power for the closing of the one-way valve 22, but also ensures that the valve core 222 moves smoothly and resets accurately during opening and closing, avoiding jamming or impact damage. During the opening of the valve core 222, the elastic force of the elastic element 223 gradually increases, acting as a buffer to prevent the valve core 222 from rapidly impacting the bottom of the valve body 221. During the closing of the valve core 222, the elastic force of the elastic element 223 gradually releases, pushing the valve core 222 smoothly into the first section 2261, preventing violent collisions between the valve core 222 and the side wall of the first section 2261, and reducing wear. This smooth operating characteristic significantly improves the service life of the one-way valve 22. For example, as... Figure 9 and Figure 10As shown, when a spring is used as the elastic element 223, the fatigue life of the spring can reach tens of thousands of cycles. Under normal use, the wear between the valve core 222 and the valve body 221 is minimal, which can ensure the long-term stable operation of the check valve 22. At the same time, the presence of the elastic element 223 gives the movement of the valve core 222 a self-resetting ability. Even if the valve core 222 is slightly deviated, the elastic element 223 can reset it to the correct position through elastic force, ensuring the normal operation of the check valve 22.

[0055] Among them, such as Figure 7 As shown, the valve body 221 can be cylindrical; as Figure 9 and Figure 10 As shown, the valve body 221 can be formed by two pipe sections with different diameters. The smaller diameter pipe section forms the first section 2261 of the suction channel 226, and the larger diameter pipe section forms the second section 2262 of the suction channel 226. The diameter of the valve body 221 matches that of the smaller diameter pipe section so that the valve body 221 can make sealing contact with the inner wall of the smaller diameter pipe section. Since the diameter of the valve body 221 is smaller than that of the larger diameter pipe section, there is a circumferential gap between them, which allows the suction channel 226 of the valve body 221 to be open.

[0056] The valve body 221 may be made of rubber and make a sealing contact with the inner wall of the pipe section with a smaller diameter; the valve body 221 may also be made of a rigid material, such as rigid plastic or metal. A sealing ring may be provided around the circumference of the valve body 221 to make a sealing contact with the inner wall of the pipe section with a smaller diameter. This disclosure does not limit this.

[0057] In some embodiments, a guide structure is provided in the second segment 2262 of the suction channel 226. The guide structure is used to guide the valve core 222 to move between the first segment 2261 or the second segment 2262 in the suction channel 226. For example, the first segment 2261 of the suction channel 226 is formed by a pipe segment with a smaller diameter, and the second segment 2262 of the suction channel 226 is formed by a pipe segment with a larger diameter. There is a circumferential gap between the valve body 221 and the pipe segment with a larger diameter. By providing a guide structure, the valve core 222 can move smoothly between pipe segments with different diameters, avoiding deviation or jamming that would affect the opening and closing of the suction channel 226.

[0058] In other words, the guide structure precisely guides the movement trajectory of the valve core 222, ensuring that the valve core 222 always moves axially along the suction channel 226 during opening and closing, without radial offset or tilting. Without the guide structure, the valve core 222 may experience radial offset due to uneven force under the action of pressure difference and elastic force of elastic element 223, causing the valve core 222 to fail to be accurately positioned in the first section 2261 of the suction channel 226, affecting the sealing effect.

[0059] Furthermore, the guide structure also protects the valve core 222 and valve body 221, reducing wear on both and extending the service life of the check valve 22. Without the guide structure, the valve core 222 may collide or rub violently with the valve body 221 (especially at the transition step between the first section 2261 and the second section 2262) during movement due to offset or tilt, leading to wear on the valve core 222 or valve body 221, affecting sealing performance and structural strength. After long-term use, wear may cause the valve core 222 to malfunction, requiring replacement of the entire check valve 22. The guide structure, by limiting the movement trajectory of the valve core 222, avoids unnecessary contact between the valve core 222 and valve body 221, reducing wear and protecting the structural integrity of the valve core 222 and valve body 221.

[0060] The guiding structure can be a guide post, guide groove, guide sleeve, etc., which, through its cooperation with the valve core 222, provides clear motion constraints for the valve core 222. For example, if a guide post coaxial with the air extraction channel 226 is set at the bottom of the second section 2262 of the air extraction channel 226, and a corresponding guide hole is set on the valve core 222, the movement of the valve core 222 will be restricted in the axial direction when the guide post is inserted into the guide hole, and there will be no radial deviation even when subjected to uneven fluid impact force; an axial guide groove can also be set on the side wall of the second section 2262 of the air extraction channel 226, and a guide protrusion can be set on the valve core 222. The guide protrusion is embedded in the guide groove to achieve precise guidance of the movement trajectory of the valve core 222; or an axial guide protrusion can be set on the side wall of the second section 2262 of the air extraction channel 226, and the guide protrusion will guide the valve core 222, thereby achieving precise guidance of the movement trajectory of the valve core 222.

[0061] The embodiments of this disclosure also provide a vacuum sealing device, which includes the aforementioned vacuum sealing nozzle 20, a robotic arm, and a vacuuming device. The robotic arm is used to move the vacuum sealing nozzle 20 to the target contact surface; the vacuuming device is used to evacuate the vacuum sealing nozzle 20 moved to the target contact surface through the air extraction port 224, so that the vacuum sealing nozzle 20 is adsorbed onto the target contact surface.

[0062] The target contact surface is, for example, the surface of the area surrounding the terminal assembly on the aluminum sheet 111 of the single cell 10. A robotic arm can clamp and move a spare vacuum sealing nozzle 20 onto the aluminum sheet 111 of the single cell 10. For example, a vacuum sealing nozzle 20 can be placed on the first terminal 1141 and the second terminal 1142 of the single cell electrode using the robotic arm. A receiving space 213 accommodates the portion protruding from the aluminum sheet 111, thus encasing the first terminal 1141 and the first upper plastic 1151 within the receiving space 213 of a sealing member 21, and encasing the second terminal 1142 and the second upper plastic 1152 within the receiving space 213 of another sealing member 21. Next, the vacuum equipment is connected to the suction port 224 of the vacuum sealing nozzle 20 placed on the aluminum sheet 111 through a pipeline. After connection, the vacuum equipment performs a vacuuming operation for a preset time (e.g., 1S~2S). At this time, the air pressure on the air inlet 225 side of the one-way valve 22 is higher than that on the suction port 224 side. The one-way valve 22 opens and extracts the gas in the accommodating space 213 of the sealing member 21, so that the part of the sealing member 21 surrounding the open end is tightly adsorbed onto the aluminum sheet 111 under the action of external pressure, achieving a sealed contact with the aluminum sheet 111. When the vacuum equipment stops working, the air pressure on the suction port 224 side of the one-way valve 22 is higher than that on the inlet port 225 side. At this time, the one-way valve 22 automatically closes, forming a reverse seal, which effectively prevents outside air from entering the containment space 213. Therefore, the containment space 213 can be maintained in a negative pressure state so that the sealing element 21 can be continuously adsorbed on the light aluminum sheet 111, and can continuously form a complete isolation between the plastic area and the area with the liquid injection hole 113 on the light aluminum sheet 111.

[0063] The vacuum sealing device may further include a storage device, a conveyor tray, and a conveyor belt. The storage device can store a large number of vacuum sealing nozzles 20 for later use. The conveyor tray can be located on the storage device. The conveyor tray rotates the vacuum sealing nozzles 20 from the storage device to one end of the conveyor belt, which then transports them to the gripping position of the robotic arm. The robotic arm then moves the vacuum sealing nozzles 20 from the conveyor belt and places them onto the aluminum sheet 111 of the individual battery 10, thus achieving the placement of the vacuum sealing nozzles 20 from the storage position onto the aluminum sheet 111 of the individual battery 10. Therefore, the vacuum sealing device achieves a streamlined operation of automatically placing the vacuum sealing nozzles 20 and automatically vacuuming them to adhere them to the aluminum sheet 111, thereby improving production efficiency.

[0064] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A vacuum sealed suction nozzle, characterized in that include: A sealing element (21) having a receiving space (213) having an open end and a connecting hole (214) communicating with the receiving space (213); a portion of the sealing element (21) surrounding the open end is used for sealing and adsorption with the target contact surface; A one-way valve (22) has an air inlet (225) and an air extraction port (224). The air inlet (225) is connected to the connecting hole (214), and the air extraction port (224) is used to connect to a vacuum pumping device.

2. The vacuum sealed suction cup of claim 1, wherein, The sealing member (21) includes a receiving portion (211) and an adsorption portion (212). The receiving portion (211) has the receiving space (213) and the connecting hole (214). The adsorption portion (212) is connected to the receiving portion (211) and surrounds the opening of the receiving space (213). The side of the adsorption portion (212) away from the receiving portion (211) forms the open end.

3. The vacuum sealed suction cup of claim 2, wherein, The size of the adsorption portion (212) increases in the direction away from the receiving portion (211).

4. The vacuum sealed suction nozzle of claim 2, wherein, The open end formed by the adsorption section (212) is circular.

5. The vacuum sealed suction cup of claim 2, wherein, The receiving portion (211) is cylindrical, and / or the adsorption portion (212) is frustum-shaped.

6. The vacuum sealed suction cup of claim 2, wherein, The receiving part (211) is made of a rigid material, and / or the adsorption part (212) is made of a flexible material.

7. The vacuum sealed suction cup of claim 2, wherein, The adsorption part (212) is made of rubber.

8. The vacuum sealed suction cup of any one of claims 1-7, wherein, The one-way valve (22) includes: A valve body (221) is formed with an air extraction channel (226), and the air extraction channel (226) has an air inlet (225) and an air extraction port (224) at both ends. The air extraction channel (226) includes a first section (2261) near the air inlet (225) and a second section (2262) near the air extraction port (224), and the size of the second section (2262) is larger than the size of the first section (2261). The valve core (222) and the elastic element (223) are located in the air extraction channel (226). One end of the elastic element (223) is connected to one end of the valve body (221) near the air extraction port (224), and the other end is connected to the valve core (222). When the air pressure on the side of the valve core (222) near the air extraction port (224) is greater than the air pressure on the side near the air inlet (225), the valve core (222) can be located in the first section (2261) of the air extraction channel (226) and make sealed contact with the side wall of the first section (2261); when the air pressure on the side of the valve core (222) near the air extraction port (224) is less than the air pressure on the side near the air inlet (225), the valve core (222) can compress the elastic element (223) to move into the second section (2262) of the air extraction channel (226) and there is a gap between it and at least part of the side wall of the second section (2262).

9. The vacuum sealed suction cup of claim 8, wherein, The second section (2262) of the air extraction channel (226) is provided with a guide structure, which is used to guide the valve core (222) to move between the first section (2261) and the second section (2262) in the air extraction channel (226).

10. The vacuum sealed suction cup of claim 8, wherein, The elastic element (223) is a spring.

11. A vacuum-pumping sealing device, characterized by include: The vacuum sealing nozzle (20) according to any one of claims 1 to 10; A robotic arm for moving the vacuum sealing nozzle (20) to the target contact surface; A vacuuming device is used to evacuate the vacuum sealing nozzle (20) that has been moved to the target contact surface through the air extraction port (224) so ​​that the vacuum sealing nozzle (20) is adsorbed onto the target contact surface.

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