Sealing gun, sealing apparatus and sealing method

Abstract

The application provides a sealing gun, a sealing device and a sealing method. The sealing gun is used for sealing a sealing plug into a liquid injection port of a battery. The sealing gun comprises a sealing part for sealing the liquid injection port, the sealing part having a conveying channel for conveying the sealing plug and a pushing channel communicated with the conveying channel, a first outlet hole of the conveying channel being used for being communicated with the liquid injection port; a pushing part, at least a part of the pushing part being movably arranged in the pushing channel, so that the sealing plug in the conveying channel is pushed to move by the pushing part to seal into the liquid injection port; and a vacuum channel communicated with the liquid injection port in the sealing part, so that the gas in the battery is extracted through the vacuum channel before the sealing plug seals the liquid injection port. The sealing gun of the application solves the problem that the gas in the battery cannot be discharged in the process of sealing in the prior art.

Description

Technical Field

[0001] This invention relates to the field of battery sealing, and more specifically, to a sealing gun, sealing equipment, and sealing method. Background Technology

[0002] Hard-shell batteries have traditionally used a dual-layer encapsulation method, involving first sealing the electrolyte filling port with adhesive staples (to prevent welding slag, dust, and moisture from entering the battery), and then finally sealing it with a laser welding machine. This method has become an indispensable technical means in modern industrial production.

[0003] In the practical application of battery packaging technology, although the inside of the battery is isolated from the outside, the air and moisture inside the battery are still not removed. As a result, the gas generated inside the battery during the formation of the SEI film cannot be expelled during the charging and discharging process, causing local blackening of the electrode interface, affecting the uniformity and density of the SEI film, and also affecting the battery's capacity, internal resistance, cycle life, and volume shape (gas expansion deformation), thereby reducing the battery's service life. Summary of the Invention

[0004] The main objective of this invention is to provide a sealing gun, sealing equipment, and sealing method to solve the problem that internal gas cannot be released during the sealing process of batteries in the prior art.

[0005] To achieve the above objectives, according to a first aspect of the present invention, a sealing gun is provided for sealing a plug into the electrolyte inlet of a battery. The sealing gun includes: a sealing portion for sealing the electrolyte inlet, the sealing portion having a delivery channel for delivering the sealing plug and a push channel communicating with the delivery channel, the first outlet of the delivery channel communicating with the electrolyte inlet; a push portion, at least a portion of which is movably disposed within the push channel to push the sealing plug within the delivery channel to seal the sealing plug into the electrolyte inlet; wherein the sealing portion further includes a vacuum channel communicating with the electrolyte inlet to extract gas from the battery before the sealing plug seals the electrolyte inlet.

[0006] Furthermore, the sealing gun also includes: a first sealing ring; wherein, the sealing part is provided with a mounting groove for installing the first sealing ring, and at least a portion of the first sealing ring protrudes from the mounting groove so that when the sealing gun blocks the liquid injection port, the first sealing ring seals the gap between the sealing part and the battery.

[0007] Furthermore, the sealing part includes a sealing component for connecting to the injection port and a connecting component for connecting to the pusher part, with a second sealing ring sandwiched between the sealing component and the connecting component.

[0008] Furthermore, the sealing component includes: a first outlet, which is disposed opposite to the injection port and is connected to both the delivery channel and the pushing channel; a second outlet, which is used to connect to the injection port; a vacuum channel, which is disposed inside the sealing component, with one end of the vacuum channel connected to the second outlet and the other end of the vacuum channel connected to an exhaust port, the exhaust port penetrating one side of the sealing component; and an mounting groove for installing the first sealing ring, the mounting groove being an annular groove, with both the first outlet and the second outlet located inside the mounting groove.

[0009] Furthermore, the connecting component includes two symmetrically arranged connecting parts, each of which is provided with a channel groove. The two connecting parts are spliced ​​together so that the two channel grooves form a conveying channel, a pushing channel, and a receiving cavity for accommodating the pushing part.

[0010] Furthermore, the pushing part includes: a sliding sleeve having a sliding channel inside, the sliding sleeve being fixedly installed inside the sealing part; and a push rod including a pushing part slidably disposed in the pushing channel and a sliding part slidably disposed in the sliding channel.

[0011] Furthermore, both the sliding channel and the pushing channel are cylindrical channels, and the sliding part has a cylindrical structure with an outer diameter larger than that of the pushing channel.

[0012] Furthermore, the sealing gun includes a third sealing ring, a fourth sealing ring, and a push cylinder; the sealing part includes a sealing component, one side of which is connected to the connecting component via the third sealing ring, and the other side of which is connected to the cylinder body of the push cylinder via the fourth sealing ring; at least a portion of the piston rod of the push cylinder passes through the sealing component and is connected to the sliding part to drive the sliding part to move within the sliding channel.

[0013] According to a second aspect of the present invention, a sealing device is provided, comprising: the sealing gun described above; a pushing device connected to a conveying channel of the sealing gun to convey a sealing plug into a first outlet hole of the sealing gun that is disposed opposite to the liquid injection port of the battery; and a supply device connected to the pushing device to convey the sealing plug into the conveying channel in a preset orientation.

[0014] Further, the pushing device includes: a pushing seat, one side of which has a sealing plug channel and an air inlet channel, and one end of which has a conveying channel extending into the interior of the pushing seat; both the sealing plug channel and the air inlet channel are connected to the conveying channel, and the air inlet channel and the sealing plug channel are arranged sequentially along the extension direction of the conveying channel; the other side of the pushing seat has an air outlet channel communicating with the air inlet channel; a conveying rod, which has a receiving channel for accommodating the sealing plug, and the conveying rod is movably disposed within the conveying channel so that the receiving channel has a first preset position corresponding to the sealing plug channel and a second preset position corresponding to the air inlet channel; and a driving device, which is connected to the conveying rod to drive the conveying rod to move between the first preset position and the second preset position.

[0015] According to a third aspect of the present invention, a sealing method is provided, applicable to the sealing device described above; the sealing method includes: step S1: using a supply device, conveying a sealing plug into a pushing device in a preset orientation; step S2: using the pushing device, pushing the sealing plug into a first outlet of a sealing gun by air pressure; step S3: using the sealing gun, pressing the battery and isolating the liquid injection port from the external space, so as to extract the gas in the liquid injection port of the battery from the liquid injection port; step S4: using the sealing gun, pushing the sealing plug into the liquid injection port to seal the liquid injection port.

[0016] According to the technical solution of this invention, a sealing gun is used to seal a sealing plug into the electrolyte filling port of a battery. The sealing gun includes: a sealing part for sealing the electrolyte filling port, the sealing part having a conveying channel for conveying the sealing plug and a pushing channel communicating with the conveying channel, the first outlet of the conveying channel communicating with the electrolyte filling port; a pushing part, at least a portion of which is movably disposed within the pushing channel, so as to push the sealing plug within the conveying channel to move so that the sealing plug seals into the electrolyte filling port; wherein, the sealing part also has a vacuum channel communicating with the electrolyte filling port, so as to extract gas from the battery before the sealing plug seals the electrolyte filling port. With the above configuration, the sealing part is provided with a pushing channel opposite to the electrolyte filling port of the battery, a vacuum channel communicating with the electrolyte filling port of the battery, and a conveying channel communicating with the pushing channel. When the sealing gun performs the sealing operation on the electrolyte filling port of the battery, the sealing gun abuts against the battery through the sealing part, and the sealing gun extracts gas from the battery from the electrolyte filling port through the vacuum channel. At this time, the sealing plug is conveyed into the pushing channel through the conveying channel. After the sealing gun completes the gas extraction operation, the pushing part inside the sealing gun pushes the sealing plug into the liquid injection port through the pushing channel, so that the sealing plug and the liquid injection port are in an interference fit, thereby completing the sealing operation of the battery by the sealing gun, thus solving the problem that the internal gas of the battery cannot be discharged during the sealing process in the prior art. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of an embodiment of the sealing gun according to the present invention is shown;

[0019] Figure 2 A schematic diagram of an embodiment of the sealing device of the present invention is shown;

[0020] Figure 3 A schematic diagram of the sealing component of the sealing gun of the present invention is shown;

[0021] Figure 4 A schematic diagram of the connecting component of the sealing gun of the present invention is shown;

[0022] Figure 5 A schematic diagram of the structure of the sliding sleeve of the pushing part of the sealing gun of the present invention is shown;

[0023] Figure 6 A schematic diagram of the push rod of the pushing part of the sealing gun of the present invention is shown;

[0024] Figure 7 A schematic diagram of the pushing device of the sealing device of the present invention is shown;

[0025] Figure 8 A schematic diagram of the pusher seat of the pusher device of the sealing device of the present invention is shown;

[0026] Figure 9 A schematic diagram of a battery structure using the sealing gun of the present invention for sealing operations is shown; and

[0027] Figure 10 A schematic diagram of the sealing plug used in sealing operations with the sealing gun of the present invention is shown.

[0028] The above figures include the following reference numerals:

[0029] 10. Sealing gun; 11. Sealing part; 111. Conveying channel; 1111. First outlet; 112. Pushing channel; 1131. Second outlet; 1132. Exhaust port; 114. Mounting groove; 115. Sealing component; 116. Connecting component; 117. Sealing component; 1161. Connecting part; 1163. Receiving cavity; 12. Pushing part; 121. Sliding sleeve; 1211. Sliding channel; 122. Push rod; 1221. Pressing part; 122 2. Sliding part; 13. Push cylinder; 131. Piston rod; 20. Pushing device; 21. Pushing seat; 211. Sealing plug channel; 212. Air inlet channel; 213. Conveying channel; 214. Air outlet channel; 22. Conveying rod; 221. Receiving channel; 23. Drive device; 30. Supply device; 31. Sealing plug; 40. Battery; 41. Liquid injection port; 1. First sealing ring; 2. Second sealing ring; 3. Third sealing ring; 4. Fourth sealing ring. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] The sealing gun in this embodiment, such as Figures 1 to 10As shown, the sealing gun for sealing the sealing plug 31 into the liquid injection port 41 of the battery 40 includes: a sealing part 11 for sealing the liquid injection port 41, the sealing part 11 having a delivery channel 111 for delivering the sealing plug 31 and a push channel 112 communicating with the delivery channel 111, the first outlet 1111 of the delivery channel 111 communicating with the liquid injection port 41; a push part 12, at least a portion of the push part 12 being movably disposed within the push channel 112, so as to push the sealing plug 31 within the delivery channel 111 to move so that the sealing plug 31 seals into the liquid injection port 41; wherein, the sealing part 11 also has a vacuum channel communicating with the liquid injection port 41, so as to extract gas from the battery 40 before the sealing plug 31 seals the liquid injection port 41 through the vacuum channel. With the above configuration, the sealing part 11 is provided with a push channel 112 opposite to the liquid injection port 41 of the battery 40, a vacuum channel communicating with the liquid injection port 41 of the battery 40, and a conveying channel 111 communicating with the push channel 112. When the sealing gun seals the liquid injection port 41 of the battery, the sealing gun abuts against the battery through the sealing part 11, and the sealing gun extracts the gas in the battery from the liquid injection port 41 through the vacuum channel. At this time, the sealing plug 31 is conveyed to the push channel 112 through the conveying channel 111. After the sealing gun completes the gas extraction operation, the push part 12 in the sealing gun pushes the sealing plug 31 into the liquid injection port 41 through the push channel 112, so that the sealing plug and the liquid injection port 41 are press-fitted to complete the sealing operation of the battery by the sealing gun, thereby solving the problem that the internal gas of the battery cannot be discharged during the sealing process in the prior art.

[0032] In the sealing gun of this embodiment, such as Figure 1 As shown, the sealing gun also includes a first sealing ring 1; wherein, the sealing part 11 is provided with a mounting groove 114 for mounting the first sealing ring 1, and at least a portion of the first sealing ring 1 protrudes from the mounting groove 114 so that when the sealing gun blocks the liquid injection port 41, the first sealing ring 1 seals the gap between the sealing part 11 and the battery 40.

[0033] During the sealing process of the sealing gun on the electrolyte inlet 41 of the battery 40, in order to achieve a sealed connection between the sealing part 11 and the battery, in this embodiment, the sealing gun also includes a first sealing ring 1. The sealing part 11 is provided with a mounting groove 114, and the first sealing ring 1 is mounted on the mounting groove 114 of the sealing part 11. With this configuration, when the sealing part 11 comes into contact with the battery and a vacuum operation is performed on the electrolyte inlet 41, a sealed space can be formed between the sealing part 11 and the electrolyte inlet 41, thereby ensuring that the sealing gun extracts gas from the battery 40.

[0034] In the sealing gun of this embodiment, such as Figure 1As shown, the sealing part 11 includes a sealing component 115 for connecting to the injection port 41 and a connecting component 116 for connecting to the pushing part 12, and a second sealing ring 2 is sandwiched between the sealing component 115 and the connecting component 116.

[0035] In order to connect the pushing part 12 with the sealing part 11, the above-mentioned arrangement is adopted. The pushing part 12 pushes the sealing plug 31 into the liquid injection port through the connecting part 116 and the sealing part 115 in sequence. The function of the second sealing ring 2 is to ensure the sealing connection between the sealing part 115 and the connecting part 116 when the pushing part 12 moves between the sealing part 115 and the connecting part 116.

[0036] like Figure 1 , Figure 3 As shown, in the sealing gun of this embodiment, the sealing component 115 includes: a first outlet 1111, which is disposed opposite to the injection port 41 and is connected to both the delivery channel 111 and the pushing channel 112; a second outlet 1131, which is used to connect to the injection port 41; a vacuum channel, which is disposed inside the sealing component 115, with one end of the vacuum channel connected to the second outlet 1131 and the other end of the vacuum channel connected to an exhaust port 1132, which penetrates one side of the sealing component 115; and an mounting groove 114 for mounting the first sealing ring 1, which is an annular groove, with both the first outlet 1111 and the second outlet 1131 located inside the mounting groove 114.

[0037] In the sealing gun of this embodiment, such as Figure 3 As shown, the sealing component 115 has a first outlet 1111 and a second outlet 1131 on the side connected to the injection port 41. The first outlet 1111 is connected to both the conveying channel 111 and the pushing channel 112. The first outlet 1111 is positioned opposite to the injection port 41 so that when the sealing gun performs the sealing operation, the sealing plug 31 is conveyed from the outside into the first outlet 1111, thereby causing the pushing part 12 to push the sealing plug 31 into the injection port 41. The second outlet 1131 is connected to the vacuum channel. The gas in the injection port 41 enters the vacuum channel through the second outlet 1131. The other end of the vacuum channel is connected to an exhaust port 1132, which penetrates one side of the sealing component 115, allowing the gas in the vacuum channel to be discharged from the exhaust port 1132, thereby completing the extraction of gas from the battery 40. In this embodiment, the mounting groove 114 is located on the side where the sealing component 115 is connected to the injection port 41. The mounting groove 114 is an annular groove. The first outlet 1111 and the second outlet 1131 are both located inside the mounting groove 114. Thus, when the sealing gun is performing sealing operations, the first outlet 1111 and the second outlet 1131 are both located in the sealing space inside the mounting groove, ensuring the performance of the sealing gun.

[0038] In the sealing gun of this embodiment, such as Figure 7 As shown, the connecting component 116 includes two symmetrically arranged connecting parts 1161. Each connecting part 1161 is provided with a channel groove. The two connecting parts 1161 are spliced ​​together so that the two channel grooves form a conveying channel 111, a pushing channel 112, and a receiving cavity 1163 for accommodating the pushing part 12. This structure is simple and easy to implement, and achieves the purpose of installing the pushing part 12 in the connecting component 116.

[0039] like Figure 1 , Figure 5 , Figure 6 As shown, in the sealing gun of this embodiment, the pushing part 12 includes: a sliding sleeve 121, which has a sliding channel 1211 and is fixedly installed in the sealing part 11; and a push rod 122, which includes a pressing part 1221 slidably disposed in the pushing channel 112 and a sliding part 1222 slidably disposed in the sliding channel 1211.

[0040] In this embodiment of the sealing gun, the pushing part consists of a sliding sleeve 121 and a push rod 122. The sliding sleeve 121 has a sliding channel 1211 and is fixedly installed inside the sealing part 11. The push rod 122 includes a pressing part 1221 slidably disposed in the pushing channel 112 and a sliding part 1222 slidably disposed in the sliding channel 1211. When the push rod 122 is subjected to an external pushing force, the sliding part 1222 slides in the sliding channel 1211, thereby causing the pressing part 1221 to complete the action of pressing the sealing plug 31 into the injection port 41. In this embodiment, the outside of the sliding sleeve 121 is also provided with a solid lubricant embedding groove for applying solid lubricant, so as to reduce the friction between the sliding channel 1211 and the sliding part 1222 during the operation of the sealing gun, thus ensuring the performance of the sealing gun.

[0041] In the sealing gun of this embodiment, such as Figure 1 , Figure 5 , Figure 6 As shown, both the sliding channel 1211 and the pushing channel 112 are cylindrical channels, and the sliding part 1222 is a cylindrical structure with an outer diameter larger than that of the pushing channel 112.

[0042] In this embodiment, both the sliding channel 1211 and the pushing channel 112 are cylindrical channels, and the sliding part 1222 has a cylindrical structure, making the movement of the push rod 122 smoother. The outer diameter (diameter of the outer circumferential surface) of the sliding part 1222 is larger than the outer diameter of the pushing channel 112, so that the sealing gun plays a limiting role on the pressing part 1221, preventing the push rod 122 from moving excessively and thus damaging the battery 40.

[0043] like Figure 1As shown, the sealing gun includes a third sealing ring 3, a fourth sealing ring 4, and a push cylinder 13; the sealing part 11 includes a sealing component 117, one side of which is connected to the connecting component 116 via the third sealing ring 3, and the other side of which is connected to the cylinder body of the push cylinder 13 via the fourth sealing ring 4; at least a portion of the piston rod 131 of the push cylinder 13 passes through the sealing component 117 and is connected to the sliding part 1222 to drive the sliding part 1222 to move within the sliding channel 1211.

[0044] To achieve the purpose of moving the push rod 122, in this embodiment, the sealing gun includes a third sealing ring 3, a fourth sealing ring 4, and a push cylinder 13. At least a portion of the piston rod 131 of the push cylinder 13 passes through the sealing component 117 and is connected to the sliding part 1222, thereby driving the sliding part 1222 to move within the sliding channel 1211. One side of the sealing component 117 is connected to the connecting component 116 via the third sealing ring 3, and the other side of the sealing component 117 is connected to the cylinder body of the push cylinder 13 via the fourth sealing ring 4, thereby ensuring the sealing performance inside the sealing gun.

[0045] In the sealing device of this embodiment, such as Figure 2 As shown, it includes: a sealing gun 10 as described above; a pushing device 20, which is connected to the conveying channel 111 of the sealing gun 10 to convey the sealing plug 31 into the first outlet 1111 of the sealing gun 10, which is disposed opposite to the liquid injection port 41 of the battery 40; and a supply device 30, which is connected to the pushing device 20 to convey the sealing plug 31 into the conveying channel 111 in a preset orientation.

[0046] The sealing device in this embodiment includes a sealing gun 10, a pushing device 20, and a supply device 30. The sealing gun 10 is used to vacuum and seal the battery 40. The pushing device 20 pushes the sealing plug 31 to a suitable position inside the sealing gun. The supply device delivers the sealing plug 31 into the sealing pushing device with a preset orientation (head facing forward and tail facing backward). With the above configuration, the gas extraction and sealing of the battery 40 can be automated, improving production efficiency.

[0047] In the sealing device of this embodiment, the pushing device 20 includes: a pushing seat 21, one side of which has a sealing plug channel 211 and an air inlet channel 212, and one end of which has a conveying channel 213 extending into the interior of the pushing seat 21; both the sealing plug channel 211 and the air inlet channel 212 are connected to the conveying channel 213, and the air inlet channel 212 and the sealing plug channel 211 are arranged sequentially along the extending direction of the conveying channel 213; the other side of the pushing seat 21 has an air outlet channel 214 communicating with the air inlet channel 212; a conveying rod 22, which has a receiving channel 221 for receiving the sealing plug 31, and the conveying rod 22 is movably disposed in the conveying channel 213 so that the receiving channel 221 has a first preset position corresponding to the sealing plug channel 211 and a second preset position corresponding to the air inlet channel 212; and a driving device 23, which is connected to the conveying rod 22 to drive the conveying rod 22 to move between the first preset position and the second preset position.

[0048] With the above configuration, the sealing element 31 is delivered to the sealing gun 10 with a certain kinetic energy, so that the sealing plug 31 can reach the first outlet hole 1111, so that the pushing part 12 can push the sealing plug into the liquid injection port 41 to complete the sealing operation.

[0049] The sealing method in this embodiment is as follows: Figure 10 As shown, the sealing device described above is applicable; the sealing method includes: Step S1: Using the supply device 30, the sealing plug 31 is conveyed into the pushing device 20 in a preset orientation; Step S2: Using the pushing device 20, the sealing plug 31 is pushed into the first outlet 1111 of the sealing gun 10 by air pressure; Step S3: Using the sealing gun 10, the battery 40 is pressed tightly, and the liquid injection port 41 is isolated from the external space, so as to extract the gas in the liquid injection port 41 of the battery 40; Step S4: Using the sealing gun 10, the sealing plug 31 is pushed into the liquid injection port 41 to seal the liquid injection port 41.

[0050] The following describes one embodiment of the sealing device of the present invention:

[0051] The sealing equipment includes a sealing plug vibration supply device 30, a pushing device 20, a sealing gun 10, and auxiliary devices (CCD, three-axis servo positioning system, frame, and auxiliary fixtures). The sealing plug vibration supply device (supply device 30) is used to automatically transport the sealing plug 31. The sealing plug 31 is used to seal the liquid injection port 41 of the hard-shell battery 40. The sealing plug conduit is used to connect the sealing plug vibration supply device 30 and the pushing device 20. The sealing plug conduit is used to connect the pushing device 20 and the sealing gun 10. The sealing plug conduit is made of flexible tubing and can be moved freely. The pushing device 20 is used to transport multiple sealing plugs 31 into a single sealing plug 31. The sealing gun 10 can automatically insert the sealing plug 31 into the liquid injection port 41 after evacuating the hard-shell battery 40 to achieve a vacuum sealing effect. The auxiliary devices are used to position, support, and fix the hard-shell battery negative pressure sealing equipment.

[0052] The automatic conveying process of the sealing plug 31 is as follows: The supply device 30 is a sealing plug conveying device. The hopper is made to vibrate vertically up and down by a pulse electromagnet. After the sealing plug 31 in the hopper is subjected to this vibration, it rises along the spiral track. The sealing plug 31 conveyed in the opposite direction (end facing forward) falls into the bottom of the hopper and is conveyed again through the track gap. The sealing plug 31 conveyed in the forward direction is sent to the sealing plug guide tube in an orderly manner.

[0053] Sealing plug 31 delivery: The sealing plug 31 in the sealing plug guide tube is pushed into the sealing plug channel 211 of the pusher 20 cover by the supply device 30, and falls into the receiving channel 221 of the conveyor rod 22. Since the receiving channel 221 is only the depth of one sealing plug 31, after the photoelectric switch senses that the sealing plug 31 is in place, the sealing plug 31 drive device 23 is activated (retracted), pulling the only sealing plug 31 to the position of the air outlet channel 214 of the bottom plate of the pusher 20. Compressed air is injected from the air inlet channel 212 of the top cover of the pusher 20, pushing the sealing plug 31 to slide out from the air outlet channel 214 of the bottom plate of the pusher 20, and pushed into the quick connector hole of the sealing gun 10 cavity sealing component 115 through the sealing plug guide tube, and then slides into the first outlet hole 1111 of the sealing gun 10 along the rubber particle guide arc hole (conveying channel 111) of the sealing gun 10 cavity sealing component 115. (The curvature of the arc-shaped hole must be greater than the length of the sealing plug 31 to facilitate the passage of the sealing plug 31.)

[0054] The vacuuming process is as follows: After the CCD takes a picture of the hard-shell battery 40 to confirm the position of the liquid injection port 41, it is sent to the bottom of the sealing gun 10 by the three-axis servo conveying and positioning system. The sealing gun 10 presses down to block the liquid injection port 41 of the hard-shell battery 40. A closed space is formed between the hard-shell battery 40, the sealing gun 10 and the pushing device 20 by the sealing ring. The vacuum valve is opened and the vacuum is drawn from the second outlet hole 1131 of the lower end plate of the sealing gun 10. The air in the closed space of the hard-shell battery 40, the sealing gun 10 and the pushing device 20 is drawn away from the exhaust hole 1132 of the sealing gun 10.

[0055] The process of pressing the sealing plug 31 is as follows: When the vacuum reaches the set value, the piston rod of the cylinder of the sealing gun 10 pushes the push rod 122 along the sliding sleeve 121 (equipped with a special self-lubricating sleeve) to press the sealing plug 31 into the liquid injection port 41. The pressing depth of the sealing plug 31 is adjusted by the cylinder stroke adjustment screw of the sealing gun 10.

[0056] The sealing equipment operates as follows: after the sealing plug 31 is pressed into place, the steel needle retracts and the vacuum is released, the sealing gun 10 and the conveyor rod 22 return to their original positions, the sealing plug 31 is sent, the sealing plug 31 is divided, the vacuum is drawn, and the sealing plug 31 is pressed in, and so on in a repeated cycle.

[0057] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0058] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0059] The sealing gun in this embodiment, such as Figures 1 to 10As shown, the sealing gun for sealing the sealing plug 31 into the liquid injection port 41 of the battery 40 includes: a sealing part 11 for sealing the liquid injection port 41, the sealing part 11 having a delivery channel 111 for delivering the sealing plug 31 and a push channel 112 communicating with the delivery channel 111, the first outlet 1111 of the delivery channel 111 communicating with the liquid injection port 41; a push part 12, at least a portion of the push part 12 being movably disposed within the push channel 112, so as to push the sealing plug 31 within the delivery channel 111 to move so that the sealing plug 31 seals into the liquid injection port 41; wherein, the sealing part 11 also has a vacuum channel communicating with the liquid injection port 41, so as to extract gas from the battery 40 before the sealing plug 31 seals the liquid injection port 41 through the vacuum channel. With the above configuration, the sealing part 11 includes a push channel 112 opposite to the liquid injection port 41 of the battery 40, a vacuum channel connected to the liquid injection port 41 of the battery 40, and a conveying channel 111 connected to the push channel 112. When the sealing gun seals the liquid injection port 41 of the battery, the sealing gun abuts against the battery through the sealing part 11, and the sealing gun extracts the gas in the battery from the liquid injection port 41 through the vacuum channel. At this time, the sealing plug 31 is conveyed to the push channel 112 through the conveying channel 111. After the sealing gun completes the gas extraction operation, the push part 12 inside the sealing gun pushes the sealing plug 31 into the liquid injection port 41 through the push channel 112, so that the sealing plug and the liquid injection port 41 are press-fitted to complete the sealing operation of the battery by the sealing gun, thereby solving the problem that the internal gas of the battery cannot be discharged during the sealing process in the prior art.

[0060] The sealing device of the present invention utilizes a vibrating conveyor plate for sealing plugs 31 to transport the special sealing plugs 31 in the same direction in an orderly manner to the pushing device 20. The pushing device 20 then transports the sealing plugs 31 individually into the chamber of the sealing gun 10. The negative pressure gun evacuates the battery. Once the vacuum value is reached, the sealing plugs 31 are pressed into the liquid injection port for sealing, achieving absolute vacuum sealing of the battery. This prevents the electrode from contacting moisture in the air, providing space for the electrochemical reactions of subsequent battery charging and discharging.

[0061] The sealing gun of the present invention integrates vacuuming and sealing plug functions, and has a simple structure, good sealing effect, and convenient operation and maintenance.

[0062] The sealing device of the present invention has a simple structure and is easy to operate, and solves the problems of battery electrical performance degradation and structural deformation caused by normal pressure sealing.

[0063] The sealing device of the present invention provides a simple conveying device for sealing plugs 31 by setting a pushing device 20, which can conveniently convey a single sealing plug 31 individually.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., 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 sealing gun, characterized in that, The sealing gun, used to seal the sealing plug (31) into the liquid injection port (41) of the battery (40), comprises: A sealing part (11) for sealing the injection port (41) has a delivery channel (111) for delivering the sealing plug (31) and a push channel (112) communicating with the delivery channel (111). The first outlet (1111) of the delivery channel (111) is for communicating with the injection port (41). A pusher (12), at least a portion of which is movably disposed within the pusher channel (112), so as to push the sealing plug (31) in the delivery channel (111) to move so that the sealing plug (31) seals the liquid injection port (41); The sealing part (11) also has a vacuum channel communicating with the liquid injection port (41) so as to extract the gas in the battery (40) before the sealing plug (31) blocks the liquid injection port (41) through the vacuum channel; The sealing part (11) includes a sealing component (115) for connecting to the injection port (41) and a connecting component (116) for connecting to the push part (12), and a second sealing ring (2) is sandwiched between the sealing component (115) and the connecting component (116). The connecting component (116) includes two symmetrically arranged connecting parts (1161), each of which is provided with a channel groove. The two connecting parts (1161) are spliced ​​together so that the two channel grooves form the conveying channel (111), the pushing channel (112), and the receiving cavity (1163) for accommodating the pushing part (12). The sealing component (115) includes: The first outlet (1111) is disposed opposite to the injection port (41), and the first outlet (1111) is connected to both the delivery channel (111) and the pushing channel (112); The second outlet (1131) is used to connect to the injection port (41); A vacuum channel is provided inside the sealing component (115). One end of the vacuum channel is connected to the second outlet (1131), and the other end of the vacuum channel is connected to an exhaust port (1132). The exhaust port (1132) passes through one side of the sealing component (115). The mounting groove (114) for installing the first sealing ring (1) is an annular groove, and the first outlet (1111) and the second outlet (1131) are both located inside the mounting groove (114).

2. The sealing gun according to claim 1, characterized in that, The sealing gun also includes: First sealing ring (1); The sealing part (11) is provided with a mounting groove (114) for installing the first sealing ring (1). At least a portion of the first sealing ring (1) protrudes from the mounting groove (114) so ​​that when the sealing gun blocks the liquid injection port (41), the first sealing ring (1) seals the gap between the sealing part (11) and the battery (40).

3. The sealing gun according to claim 1, characterized in that, The propulsion unit (12) includes: A sliding sleeve (121) has a sliding channel (1211) inside, and the sliding sleeve (121) is fixedly installed inside the sealing part (11); The push rod (122) includes a pressing part (1221) slidably disposed in the pushing channel (112) and a sliding part (1222) slidably disposed in the sliding channel (1211).

4. The sealing gun according to claim 3, characterized in that, Both the sliding channel (1211) and the pushing channel (112) are cylindrical channels, and the sliding part (1222) is a cylindrical structure. The outer diameter of the sliding part (1222) is larger than the outer diameter of the pushing channel (112).

5. The sealing gun according to claim 3, characterized in that, The sealing gun includes a third sealing ring (3), a fourth sealing ring (4), and a push cylinder (13); the sealing part (11) includes a sealing component (117), one side of the sealing component (117) is connected to the connecting component (116) through the third sealing ring (3), and the other side of the sealing component (117) is connected to the cylinder body of the push cylinder (13) through the fourth sealing ring (4); at least a portion of the piston rod (131) of the push cylinder (13) passes through the sealing component (117) and is connected to the sliding part (1222) to drive the sliding part (1222) to move within the sliding channel (1211).

6. A sealing device, characterized in that, include: A sealing gun (10), wherein the sealing gun (10) is the sealing gun according to any one of claims 1 to 5; Pushing device (20), which is connected to the delivery channel (111) of the sealing gun (10) to deliver the sealing plug (31) into the first outlet (1111) of the sealing gun (10) which is opposite to the liquid injection port (41) of the battery (40); A supply device (30) is connected to the pusher (20) to deliver the sealing plug (31) into the delivery channel (111) in a preset orientation.

7. The sealing device according to claim 6, characterized in that, The pushing device (20) includes: A pusher seat (21) has a sealing plug channel (211) and an air inlet channel (212) on one side, and a conveying channel (213) extending into the interior of the pusher seat (21) at one end; the sealing plug channel (211) and the air inlet channel (212) are both connected to the conveying channel (213), and the air inlet channel (212) and the sealing plug channel (211) are arranged sequentially along the extension direction of the conveying channel (213); the other side of the pusher seat (21) has an air outlet channel (214) that communicates with the air inlet channel (212). The conveying rod (22) has a receiving channel (221) for accommodating the sealing plug (31), and the conveying rod (22) is movably disposed in the conveying channel (213) so that the receiving channel (221) has a first preset position corresponding to the sealing plug channel (211) and a second preset position corresponding to the air intake channel (212); A driving device (23) is connected to the transmission rod (22) to drive the transmission rod (22) to move between a first preset position and a second preset position.

8. A sealing method, characterized in that, The sealing device applicable to any one of claims 6 to 7; the sealing method comprising: Step S1: Using the supply device (30), the sealing plug (31) is delivered into the pushing device (20) in a preset orientation; Step S2: Using the pushing device (20), the sealing plug (31) is pushed into the first outlet (1111) of the sealing gun (10) by air pressure; Step S3: Using the sealing gun (10), press the battery (40) tightly and isolate the injection port (41) from the external space to extract the gas inside the injection port (41) of the battery (40); Step S4: Using the sealing gun (10), push the sealing plug (31) into the injection port (41) to block the injection port (41).

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