Sealing nail screening structure and device

Abstract

The utility model relates to a sealing nail screening structure and device. An adsorption part in the sealing nail screening structure is used for adsorbing sealing nails; the accommodating part communicates with the adsorption part and is used for communicating with air exhaust equipment; and the detection mechanism is used for detecting whether the adsorption part adsorbs the head end part or the tail end part of the sealing nail, so that the head end part and the tail end part of the sealing nail are screened, and the screened sealing nail can be effectively sealed in the liquid injection hole so as to seal the battery. The detection mechanism is used for detecting the result that whether the adsorption part adsorbs the head end part or the tail end part of the sealing nail or not, and judging that the adsorption part adsorbs the head end part or the tail end part of the sealing nail, so that the sealing nail adsorbed at the head end part can be removed, the sealing nail adsorbed at the tail end part is reserved, and the sealing nail adsorbed at the tail end part is sealed in a liquid injection hole of a corresponding battery; according to the battery sealing device, effective sealing of the battery is achieved, the phenomenon of reverse nailing during sealing nail installation is effectively avoided, the screening yield of the sealing nails is increased, and the battery sealing yield is increased.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular to a sealing nail screening structure and device. Background Art

[0002] In order to facilitate the injection of electrolyte into the battery during the production process, a liquid injection hole is usually provided on the battery. After the battery is assembled, the electrolyte needs to be injected into the battery housing through the liquid injection hole to ensure that the battery core is wetted by the electrolyte. After the battery injection is completed, a sealing rubber particle (also known as a sealing nail) needs to be sealed in the liquid injection hole to prevent the electrolyte from volatilizing and water vapor from entering the battery interior, which may cause the battery to fail. The sealing rubber particle usually includes a tail end portion and a head end portion. The size of the head end portion is smaller, and the size of the tail end portion is larger. When the sealing rubber particle seals the liquid injection hole, the head end portion first enters the liquid injection hole, and the tail end portion enters the liquid injection hole later and plays a sealing role.

[0003] In the actual process of sealing the liquid injection hole with the sealing rubber particle, the sealing rubber particle is screened for the head and tail end portions through a vibrating disk, and the screened sealing rubber particle is sealed in the liquid injection hole to seal the battery. However, there is still a "reverse nail" phenomenon after screening by the vibrating disk. For example, the target screening requirement is that the tail end portion of the sealing rubber particle faces forward, but actually after screening, the head end portion of the sealing rubber particle faces forward. As a result, the battery sealing fails, and it is not easy to discharge for rework, causing the battery to be scrapped. Summary of the Utility Model

[0004] Based on this, a sealing nail screening structure and device are provided.

[0005] In a first aspect, the present application provides a sealing nail screening structure, including:

[0006] An adsorption portion for adsorbing a sealing nail, the sealing nail including a head end portion and a tail end portion;

[0007] A receiving portion communicating with the adsorption portion, the receiving portion being used to communicate with an air extraction device;

[0008] A detection mechanism for detecting whether the head end portion or the tail end portion of the sealing nail is adsorbed by the adsorption portion.

[0009] In one embodiment, the adsorption portion is provided with a first channel; the first channel has a first port and a second port;

[0010] The first port is used for adsorbing the sealing nail, the second port communicates with the receiving portion, and the detection mechanism is disposed adjacent to the second port.

[0011] In one embodiment, the area of the first port is less than or equal to the area of the tail end portion of the sealing nail; the area of the first port is greater than the area of the head end portion of the sealing nail.

[0012] In one embodiment, the longest inner diameter of the first port is greater than the longest diameter of the head end of the sealing nail.

[0013] In one embodiment, the first port is in a strip shape or a cross shape.

[0014] In one embodiment, the detection mechanism includes a pneumatic pressure monitoring module, and the pneumatic pressure monitoring module is connected to the air extraction device;

[0015] The pneumatic pressure monitoring module is further configured to control the start and stop of the air extraction device according to the detected current air pressure.

[0016] In a second aspect, the present application provides a sealing nail screening device, including an air extraction device, a vibrating disk, and a sealing nail screening structure as described in any one of the above; the sealing nail screening structure is connected to the air extraction device; the vibrating disk is used for preliminarily screening the sealing nails;

[0017] The sealing nail screening structure is used for adsorbing the preliminarily screened sealing nails and performing secondary screening on the preliminarily screened sealing nails.

[0018] In one embodiment, the sealing nail screening device further includes a limiting post;

[0019] The limiting post is used for accommodating the preliminarily screened sealing nails and limiting the preliminarily screened sealing nails.

[0020] In one embodiment, the limiting post is provided with a second channel; the second channel has a third port and a fourth port;

[0021] The third port is used for inserting the preliminarily screened sealing nails so that the preliminarily screened sealing nails are limited in the second channel;

[0022] The fourth port is used for inserting into the first port to adsorb and take out the limited sealing nails through the first port.

[0023] In one embodiment, the air extraction device is provided with a valve body; the valve body is connected to the detection mechanism.

[0024] One of the above technical solutions has the following advantages and beneficial effects:

[0025] In the above-mentioned sealing nail screening structure, it includes an adsorption part, a containing part and a detection mechanism. The adsorption part is used to adsorb the sealing nail, and the sealing nail includes a head end and a tail end; the containing part is communicated with the adsorption part, and the containing part is used to communicate with the air extraction device; the detection mechanism is used to detect whether the part adsorbed by the adsorption part is the head end or the tail end of the sealing nail, so as to realize the screening of the head and tail ends of the sealing nail, and can effectively seal the screened sealing nail in the liquid injection hole to seal the battery. By optimizing the sealing nail screening structure and introducing a detection mechanism in this application, based on the result detected by the detection mechanism, it is determined whether the adsorption part adsorbs the head end or the tail end of the sealing nail. Furthermore, the sealing nails with the head end adsorbed can be removed, and the sealing nails with the tail end adsorbed can be retained, and the sealing nails with the tail end adsorbed can be sealed in the liquid injection hole of the corresponding battery, realizing the effective sealing of the battery, effectively avoiding the reverse nail phenomenon during the installation of the sealing nail, improving the screening yield of the sealing nail, and improving the sealing yield of the battery. Description of the Drawings

[0026] Figure 1 Schematic diagram of the first reverse nail adsorption structure of the sealing nail screening structure in the embodiment of the present application;

[0027] Figure 2 Schematic diagram of the second reverse nail adsorption structure of the sealing nail screening structure in the embodiment of the present application;

[0028] Figure 3 Schematic diagram of the first correct nail adsorption structure of the sealing nail screening structure in the embodiment of the present application;

[0029] Figure 4 Schematic diagram of the second correct nail adsorption structure of the sealing nail screening structure in the embodiment of the present application;

[0030] Figure 5 Schematic diagram of the first structure of the sealing nail screening structure in the embodiment of the present application;

[0031] Figure 6 Schematic diagram of the second structure of the sealing nail screening structure in the embodiment of the present application;

[0032] Figure 7 Schematic diagram of the second structure of the sealing nail screening structure from another perspective in the embodiment of the present application;

[0033] Figure 8 Schematic diagram of the partial structure of the sealing nail screening device in the embodiment of the present application;

[0034] Figure 9 Schematic diagram of the first cross-sectional structure of the limit post in the embodiment of the present application;

[0035] Figure 10 Schematic diagram of the second cross-sectional structure of the limit post in the embodiment of the present application;

[0036] Figure 11This is a schematic diagram of the circuit structure of the sealing nail screening device in the embodiments of the present application.

[0037] Reference numerals:

[0038] 10. Adsorption part; 110. First channel; 112. First port; 114. Second port; 20. Accommodating part; 30. Detection mechanism; 310. Air pressure monitoring module; 40. Sealing nail; 410. Head end; 420. Tail end; 50. Air extraction device; 510. Valve body; 60. Limit post; 610. Second channel; 612. Third port; 614. Fourth port. Detailed implementation manners

[0039] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0040] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of the present application here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0041] In the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0042] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances.

[0043] In addition, the term "a plurality of" shall mean two or more than two.

[0044] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] In one embodiment, as Figures 1 to 4 shown, a sealing nail screening structure is provided, including an adsorption part 10, a containing part 20 and a detection mechanism 30. The adsorption part 10 is used for adsorbing the sealing nail 40, and the sealing nail 40 includes a head end part 410 and a tail end part 420; the containing part 20 communicates with the adsorption part 10, and the containing part 20 is used for communicating with an air extraction device 50; the detection mechanism 30 is used for detecting whether the adsorption part 10 adsorbs the head end part 410 or the tail end part 420 of the sealing nail 40.

[0046] Among them, the sealing nail 40 can be used to seal the liquid injection hole of the battery. The battery can be, but is not limited to, a square or cylindrical lithium battery. For example, the shape of the battery can be in the shape of a cuboid. The battery can be a single cell battery, which includes a housing and an electric core. The electric core is arranged in the housing, and a liquid injection hole is arranged on the housing. The electrolyte is injected into the housing through the through liquid injection hole to ensure that the electric core of the battery is wetted by the electrolyte.

[0047] The sealing nail 40 can be a sealing member made of rubber material, and the sealing nail 40 includes a head end part 410 and a tail end part 420; the size of the head end part 410 of the sealing nail 40 is smaller than the size of the tail end part 420. When sealing the liquid injection hole of the battery, the head end part 410 of the sealing nail 40 first enters the liquid injection hole, and the tail end part 420 enters the liquid injection hole later, so as to effectively seal the liquid injection hole of the battery. That is, when the adsorption part 10 adsorbs the tail end part 420 of the sealing nail 40, the movement of the sealing nail 40 can be controlled to move above the liquid injection hole, and after applying pressure to the sealing nail 40, the head end part 410 of the sealing nail 40 first enters the liquid injection hole, so as to effectively seal the liquid injection hole of the battery; when the adsorption part 10 adsorbs the head end part 410 of the sealing nail 40, if the tail end part 420 of the sealing nail 40 is forced to enter the liquid injection hole for sealing, it will cause the sealing nail 40 to be unable to be inserted into the liquid injection hole or cause damage to the liquid injection hole, resulting in the failure of battery sealing, and it is not easy to discharge for rework, which is likely to cause battery scrapping.

[0048] The adsorption part 10 can have a hollow structure and is used to adsorb the sealing nail 40. For example, when the adsorption part 10 adsorbs the head end 410 of the sealing nail 40, it is determined that the sealing nail 40 is in the reverse nail state, that is, the sealing nail 40 faces the liquid injection hole of the battery that cannot be effectively sealed; when the adsorption part 10 adsorbs the tail end 420 of the sealing nail 40, it is determined that the sealing nail 40 is in the correct nail state, that is, the sealing nail 40 faces the liquid injection hole of the battery that can be effectively sealed. It should be noted that when the sealing nail 40 adsorbed by the adsorption part 10 is in the correct nail state, the operator can directly operate the adsorption part 10 to move and apply pressure to the adsorption part 10, so as to control the head end 410 of the sealing nail 40 to first insert into the liquid injection hole, realizing effective sealing of the liquid injection hole of the battery. In another example, when the sealing nail 40 adsorbed by the adsorption part 10 is in the correct nail state, the adsorption part 10 can also be driven to move by a robotic arm and pressure is applied to the adsorption part 10, so as to automatically control the head end 410 of the sealing nail 40 to first insert into the liquid injection hole, realizing effective sealing of the liquid injection hole of the battery.

[0049] The accommodating part 20 and the adsorption part 10 can be an integrally formed structure. The accommodating part 20 is used to accommodate the detection mechanism 30 and is also used to communicate with the air extraction device 50. Based on the accommodation part 20 communicating with the adsorption part 10 and the accommodation part 20 communicating with the air extraction device 50, when the air extraction device 50 is turned on, air is sequentially transmitted to the air extraction device 50 through the adsorption part 10 and the accommodation part 20, so that the adsorption part 10 plays an air suction role. When the adsorption part 10 is adjacent to one end (the head end 410 or the tail end 420) of the sealing nail 40, the adsorption part 10 can adsorb the sealing nail 40. It should be noted that the air extraction device 50 can include a pump body, and the pump body communicates with the accommodation part 20 through a pipeline.

[0050] The detection mechanism 30 can be arranged adjacent to the adsorption part 10 and can be arranged in the accommodation part 20 by means of clamping or welding. The detection mechanism 30 is used to detect the current air pressure of the adsorption part 10 and determine whether the adsorption part 10 adsorbs the head end 410 or the tail end 420 of the sealing nail 40 according to the fluctuation of the current air pressure. Exemplarily, if the detection mechanism 30 detects that the change amount of the current air pressure is greater than a preset threshold, it is determined that the adsorption part 10 adsorbs the head end 410 of the sealing nail 40, that is, the head end 410 of the sealing nail 40 seals the adsorption part 10, making the adsorption part 10 in a vacuum or near-vacuum state; if the detection mechanism 30 detects that the change amount of the current air pressure is less than the preset threshold, it is determined that the adsorption part 10 adsorbs the tail end 420 of the sealing nail 40, that is, there is a gap between the tail end 420 of the sealing nail 40 and the adsorption part 10, making the adsorption part 10 in a state of gap air leakage.

[0051] Exemplarily, the screening process of the sealing nail 40 is as follows: Start the air extraction device 50, suck the sealing nail 40 through the adsorption part 10, and at the same time detect the current air pressure of the adsorption part 10 through the detection mechanism 30. If the current air pressure detected by the detection mechanism 30 does not fluctuate (or the change amount of the current air pressure is less than the preset threshold), it is determined that the orientation of the sealing nail 40 is the positive nail, and the inside of the adsorption part 10 is in a vacuum state; if the current air pressure detected by the detection mechanism 30 fluctuates (or the change amount of the current air pressure is greater than the preset threshold), it is determined that the orientation of the sealing nail 40 is the reverse nail, and the inside of the adsorption part 10 is in a state of gap air leakage. In one example, when it is determined that the orientation of the sealing nail 40 is the reverse nail, the air extraction device 50 pauses to work, so that the corresponding sealing nail 40 adsorbed by the adsorption part 10 drops, avoiding sealing the sealing nail 40 with the reverse orientation in the liquid injection hole, thereby completing the screening of the sealing nail 40; when it is determined that the orientation of the sealing nail 40 is the positive nail, the adsorption part 10 can be moved so that the corresponding sealing nail 40 adsorbed by the adsorption part 10 seals the liquid injection hole, thereby realizing effective sealing of the liquid injection hole.

[0052] In the above embodiment, the adsorption part 10 is used to adsorb the sealing nail 40, and the sealing nail 40 includes a head end part 410 and a tail end part 420; the accommodating part 20 is communicated with the adsorption part 10, and the accommodating part 20 is used to communicate with the air extraction device 50; the detection mechanism 30 is used to detect whether the head end part 410 or the tail end part 420 of the sealing nail 40 is adsorbed by the adsorption part 10, realizing the screening of the head and tail end parts 420 of the sealing nail 40, and being able to effectively seal the screened sealing nail 40 in the liquid injection hole to seal the battery. The present application optimizes the screening structure of the sealing nail 40 and introduces the detection mechanism 30. Through the result monitored by the detection mechanism 30, it is determined whether the head end part 410 or the tail end part 420 of the sealing nail 40 is adsorbed by the adsorption part 10. Furthermore, the sealing nail 40 with the head end part 410 adsorbed can be removed, and the sealing nail 40 with the tail end part 420 adsorbed is retained, and the sealing nail 40 with the tail end part 420 adsorbed is sealed in the liquid injection hole of the corresponding battery, realizing effective sealing of the battery, effectively avoiding the reverse nail phenomenon during the installation of the sealing nail 40, improving the screening yield of the sealing nail 40, and improving the sealing yield of the battery.

[0053] In one embodiment, as Figure 1 、 Figure 3 and Figure 5 shown, the adsorption part 10 is provided with a first channel 110; the first channel 110 has a first port 112 and a second port 114; the first port 112 is used to adsorb the sealing nail 40, the second port 114 is communicated with the accommodating part 20, and the detection mechanism 30 is arranged adjacent to the second port 114.

[0054] Among them, the adsorption part 10 can be in the shape of a pipeline. For example, the adsorption part 10 can be a linear pipeline structure. A first channel 110 is arranged inside the adsorption part 10. A first port 112 of the first channel 110 is used to adsorb the sealing nail 40, and a second port 114 of the first channel 110 is used to communicate with the accommodating part 20. Exemplarily, the detection mechanism 30 can be arranged in a fitting manner with the second port 114, and then the detection mechanism 30 can monitor the air pressure of the second port 114 of the adsorption part 10.

[0055] Exemplarily, when screening the sealing nail 40, one end of the sealing nail 40 is adsorbed through the first port 112 of the first channel 110 of the adsorption part 10, and the current air pressure in the first channel 110 is detected through the detection mechanism 30. If the current air pressure detected by the detection mechanism 30 does not fluctuate, it is determined that the orientation of the sealing nail 40 is the correct nail, and the inside of the first channel 110 of the adsorption part 10 is in a vacuum state. Then, by moving the adsorption part 10, the corresponding sealing nail 40 adsorbed by the adsorption part 10 can seal the liquid injection hole, thereby realizing the effective sealing of the liquid injection hole. If the current air pressure detected by the detection mechanism 30 fluctuates, it is determined that the orientation of the sealing nail 40 is the reverse nail, and the inside of the first channel 110 of the adsorption part 10 is in a state of gap air leakage. Then, the air extraction device 50 pauses working, so that the corresponding sealing nail 40 adsorbed by the adsorption part 10 drops, avoiding sealing the sealing nail 40 with the reverse orientation in the liquid injection hole, thereby completing the screening of the sealing nail 40, effectively avoiding the reverse nail phenomenon when installing the sealing nail 40, improving the screening yield of the sealing nail 40, and improving the sealing yield of the battery.

[0056] In one embodiment, as Figures 1 to 4 shown, the area of the first port 112 is less than or equal to the area of the tail end part 420 of the sealing nail 40; the area of the first port 112 is greater than the area of the head end part 410 of the sealing nail 40.

[0057] Among them, the end face of the tail end part 420 of the sealing nail 40 can be planar. For example, the end face of the tail end part 420 can be a circular end face; the end face of the head end part 410 of the sealing nail 40 can be conical or irregular. For example, the end face of the tail end part 420 can be a conical end face.

[0058] By setting the area of the first port 112 to be less than or equal to the area of the tail end portion 420 of the sealing nail 40, it can be ensured that when the first port 112 of the adsorption portion 10 adsorbs the tail end portion 420 of the sealing nail 40, the tail end portion 420 of the sealing nail 40 can completely cover the first port 112, so that there is no air leakage gap between the tail end portion 420 of the sealing nail 40 and the first port 112, and thus the first channel 110 in the adsorption portion 10 is in a vacuum or near-vacuum state; by setting the area of the first port 112 to be greater than the area of the head end portion 410 of the sealing nail 40, when the first port 112 of the adsorption portion 10 adsorbs the head end portion 410 of the sealing nail 40, the tail end portion 420 of the sealing nail 40 cannot completely cover the first port 112, so that an air leakage gap is formed between the tail end portion 420 of the sealing nail 40 and the first port 112, and then the first channel 110 in the adsorption portion 10 is in a state of gap air leakage. Thus, the current air pressure in the first channel 110 can be monitored by the detection mechanism 30 to determine whether the adsorption portion 10 adsorbs the head end portion 410 or the tail end portion 420 of the sealing nail 40, so as to remove the sealing nail 40 adsorbed on the head end portion 410, retain the sealing nail 40 adsorbed on the tail end portion 420, and seal the sealing nail 40 adsorbed on the tail end portion 420 in the liquid injection hole of the corresponding battery, realizing effective sealing of the battery, improving the screening yield of the sealing nail 40, and improving the yield of battery sealing.

[0059] In one embodiment, the longest inner diameter of the first port 112 is greater than the longest diameter of the head end portion 410 of the sealing nail 40.

[0060] By setting the longest inner diameter of the first port 112 to be greater than the longest diameter of the head end portion 410 of the sealing nail 40, when the first port 112 of the adsorption portion 10 adsorbs the head end portion 410 of the sealing nail 40, the tail end portion 420 of the sealing nail 40 cannot completely cover the first port 112, so that an air leakage gap is formed between the tail end portion 420 of the sealing nail 40 and the first port 112, and then the first channel 110 in the adsorption portion 10 is in a state of gap air leakage. Thus, it can be determined that the sealing nail 40 is in the reverse-nail orientation by monitoring that the current air pressure in the first channel 110 fluctuates. By controlling the pumping device 50 to pause, the corresponding sealing nail 40 adsorbed by the adsorption portion 10 drops, avoiding sealing the sealing nail 40 with the reverse-nail orientation in the liquid injection hole, effectively avoiding the reverse-nail phenomenon during the installation of the sealing nail 40, improving the screening yield of the sealing nail 40, and improving the yield of battery sealing.

[0061] In one embodiment, as Figure 3 、 Figure 5 、 Figure 6 and Figure 7 shown, the first port 112 is in a long strip shape or a cross shape.

[0062] Among them, the shape and size of the first port 112 of the first channel 110 can be determined according to the shape and size of the sealing nail 40. Exemplarily, the first port 112 can be in a long strip shape, and the shape of the second port 114 can be set to be the same as that of the first port 112. It should be noted that, for the convenience of processing and forming the adsorption part 10, the overall shape of the adsorption part 10 can be in a cuboid shape.

[0063] The sealing nail 40 is sucked through the first port 112 of the adsorption part 10. If the long strip shape (or cross shape) of the first port 112 contacts the end plate of the sealing nail 40 to form a seal, the air pressure in the first channel 110 of the adsorption part 10 monitored by the detection mechanism 30 will not fluctuate, that is, it is determined that the orientation of the sealing nail 40 is the correct nail; if the long strip shape (or cross shape) of the first port 112 contacts the head end part 410 of the sealing nail 40, an air leakage gap will be formed, and the air pressure in the first channel 110 of the adsorption part 10 monitored by the detection mechanism 30 will fluctuate, that is, it is determined that the orientation of the sealing nail 40 is the reverse nail, realizing the screening of the sealing nail 40, improving the screening yield of the sealing nail 40, and improving the yield of battery sealing.

[0064] In one embodiment, as Figure 11 shown, the detection mechanism 30 includes a gas pressure monitoring module 310, and the gas pressure monitoring module 310 is connected to the air extraction device 50; the gas pressure monitoring module 310 is further configured to control the start and stop of the air extraction device 50 according to the detected current air pressure.

[0065] Among them, when the air extraction device 50 starts, the air extraction device 50 can suck air through the accommodation part 20 and the adsorption part 10 in sequence, so that the first port 112 of the adsorption part 10 can adsorb the sealing nail 40. When the air extraction device 50 stops extracting air, the air pressure in the first channel 110 returns to be consistent with the external air pressure, so that the sealing nail 40 adsorbed by the first port 112 of the adsorption part 10 drops, completing the screening of the sealing nail 40. Exemplarily, the air extraction device 50 can include a valve body 510, and the valve body 510 is connected to the gas pressure monitoring module 310. When the air extraction device 50 starts, that is, the valve body 510 is opened to realize the air extraction function; if the gas pressure monitoring module 310 monitors the air pressure fluctuation in the first channel 110, it controls the valve body 510 to disconnect, and then the air extraction device 50 stops extracting air.

[0066] Based on the air pressure monitoring module 310 being connected to the air extraction device 50, the air extraction device 50 is started, and the sealing nail 40 is sucked through the first port 112 of the adsorption part 10. At the same time, the current air pressure of the adsorption part 10 is detected by the air pressure monitoring module 310. If the current air pressure detected by the air pressure monitoring module 310 does not fluctuate, it is determined that the orientation of the sealing nail 40 is the positive nail, and the inside of the adsorption part 10 is in a vacuum state. Then the air extraction device 50 maintains the air extraction operation, and by moving the adsorption part 10, the corresponding sealing nail 40 adsorbed by the adsorption part 10 is sealed in the liquid injection hole, thereby achieving effective sealing of the liquid injection hole. If the current air pressure detected by the air pressure monitoring module 310 fluctuates, it is determined that the orientation of the sealing nail 40 is the reverse nail, and the inside of the adsorption part 10 is in a state of intermittent air leakage. Then the air pressure monitoring module 310 can control the air extraction device 50 to pause the operation, so that the corresponding sealing nail 40 adsorbed by the adsorption part 10 drops, avoiding sealing the sealing nail 40 with the reverse orientation in the liquid injection hole, thereby completing the screening of the sealing nail 40 and improving the screening yield of the sealing nail 40.

[0067] In one embodiment, as Figure 8 and Figure 11 shown, there is also provided a sealing nail screening device, including an air extraction device 50, a vibrating disk, and a sealing nail 40 screening structure as described in any one of the above; the sealing nail 40 screening structure is connected to the air extraction device 50; the vibrating disk is used for preliminary screening of the sealing nail 40; the sealing nail 40 screening structure is used for adsorbing the preliminarily screened sealing nail 40 and performing secondary screening on the preliminarily screened sealing nail 40.

[0068] Among them, the vibrating disk can be used for preliminary screening of the sealing nail 40. For the specific description content of the air extraction device 50 and the sealing nail 40 screening structure, reference can be made to the specific description of the air extraction device 50 and the sealing nail 40 screening structure in the above embodiment, and details are not described herein again.

[0069] Exemplarily, a plurality of sealing nails 40 can be placed on a vibrating disk. By starting the vibrating disk, the vibrating disk preliminarily screens the orientations of the sealing nails 40. Start the air extraction device 50, and the adsorption part 10 sucks the correspondingly preliminarily screened sealing nails 40. At the same time, the detection mechanism 30 detects the current air pressure of the adsorption part 10. If the current air pressure detected by the detection mechanism 30 does not fluctuate, it is determined that the orientation of the sealing nail 40 is the positive nail, and the inside of the adsorption part 10 is in a vacuum state. Then, by moving the adsorption part 10, the corresponding sealing nail 40 adsorbed by the adsorption part 10 can be sealed at the liquid injection hole, thereby realizing the effective sealing of the liquid injection hole. If the current air pressure detected by the detection mechanism 30 fluctuates, it is determined that the orientation of the sealing nail 40 is the reverse nail, and the inside of the adsorption part 10 is in a state of intermittent air leakage. Then, control the air extraction device 50 to pause, so that the corresponding sealing nail 40 adsorbed by the adsorption part 10 drops, avoiding sealing the sealing nail 40 with the reverse orientation at the liquid injection hole. Thus, the screening of the sealing nails 40 is completed, effectively avoiding the reverse nail phenomenon during the installation of the sealing nails 40, improving the screening yield of the sealing nails 40, and improving the sealing yield of the battery.

[0070] In one embodiment, as Figure 8 shown, the sealing nail 40 screening device further includes a limiting post 60; the limiting post 60 is used to accommodate the preliminarily screened sealing nails 40 and limit the preliminarily screened sealing nails 40.

[0071] Among them, the limiting post 60 can be used to accommodate the sealing nails 40 preliminarily screened by the vibrating disk, and the limiting post 60 can also be used to limit the sealing nails 40 preliminarily screened by the vibrating disk. Exemplarily, the limiting post 60 has a long strip-shaped hollow structure.

[0072] After the vibrating disk vibrates and screens a plurality of sealing nails 40, the preliminarily screened sealing nails 40 are obtained. Insert the preliminarily screened sealing nails 40 into the limiting post 60 in sequence. By starting the air extraction device 50, the adsorption part 10 sucks the sealing nails 40 in the limiting post 60. At the same time, the detection mechanism 30 detects the current air pressure of the adsorption part 10. If the current air pressure detected by the detection mechanism 30 does not fluctuate, it is determined that the orientation of the sealing nail 40 is the positive nail, and the inside of the adsorption part 10 is in a vacuum state; if the current air pressure detected by the detection mechanism 30 fluctuates, it is determined that the orientation of the sealing nail 40 is the reverse nail, and the inside of the adsorption part 10 is in a state of intermittent air leakage, realizing the determination of the end orientation of the sealing nail 40 adsorbed by the adsorption part 10. Furthermore, the sealing nail 40 at the end of the adsorption head 410 can be removed, and the sealing nail 40 at the tail end of the adsorption 420 is retained, and the sealing nail 40 at the tail end of the adsorption 420 is sealed at the liquid injection hole of the corresponding battery, realizing the effective sealing of the battery, effectively avoiding the reverse nail phenomenon during the installation of the sealing nails 40, improving the screening yield of the sealing nails 40, and improving the sealing yield of the battery.

[0073] In one embodiment, asFigure 9 and Figure 10 As shown in Figure 10 , the limit post 60 is provided with a second channel 610; the second channel 610 has a third port 612 and a fourth port 614; the third port 612 is used to insert the preliminarily screened sealing nail 40 so that the preliminarily screened sealing nail 40 is limited within the second channel 610; the fourth port 614 is used to insert the first port 112 to adsorb and remove the limited sealing nail 40 through the first port 112.

[0074] Wherein, the shape and size of the second channel 610 can be determined according to the shape and size of the sealing nail 40. For example, if the end face of the tail end portion 420 of the sealing nail 40 is a circular end face, the second channel 610 can be cylindrical.

[0075] After vibrating and screening a number of sealing nails 40 by a vibrating disk, each preliminarily screened sealing nail 40 is obtained; each preliminarily screened sealing nail 40 is inserted into the third port 612 of the second channel 610 of the limit post 60 in sequence, so that each preliminarily screened sealing nail 40 is limited within the second channel 610 of the limit post 60; by starting the air extraction device 50, the first port 112 of the first channel 110 of the adsorption part 10 is inserted into the fourth port 614 of the second channel 610 of the limit post 60 to suck the sealing nail 40 in the second channel 610, and the limited sealing nail 40 is adsorbed and removed through the first port 112 of the adsorption part 10; at the same time, the detection mechanism 30 detects the current air pressure of the adsorption part 10. If the current air pressure detected by the detection mechanism 30 does not fluctuate, it is determined that the orientation of the sealing nail 40 is the positive nail and the inside of the adsorption part 10 is in a vacuum state; if the current air pressure detected by the detection mechanism 30 fluctuates, it is determined that the orientation of the sealing nail 40 is the reverse nail and the inside of the adsorption part 10 is in a state of intermittent air leakage, realizing the determination of the end orientation of the sealing nail 40 adsorbed by the adsorption part 10. Furthermore, the sealing nail 40 at the end of the adsorption head can be removed, the sealing nail 40 at the adsorption tail end 420 can be retained, and the sealing nail 40 at the adsorption tail end 420 can be sealed in the liquid injection hole of the corresponding battery, realizing the effective sealing of the battery, effectively avoiding the reverse nail phenomenon when installing the sealing nail 40, improving the screening yield of the sealing nail 40, and improving the sealing yield of the battery.

[0076] In one embodiment, as Figure 11 shown, the air extraction device 50 is provided with a valve body 510; the valve body 510 is connected to the detection mechanism 30.

[0077] Wherein, the valve body 510 can be a solenoid valve. When the air extraction device 50 is started, the valve body 510 is opened to realize the air extraction function; if the detection mechanism 30 monitors that the air pressure in the first channel 110 fluctuates, the valve body 510 is controlled to disconnect, and then the air extraction device 50 stops air extraction.

[0078] Based on the connection between the detection mechanism 30 and the valve body 510, the air extraction device 50 is started, the valve body 510 is conducted, the sealing nail 40 is sucked through the first port 112 of the adsorption part 10, and at the same time, the current air pressure of the adsorption part 10 is detected by the detection mechanism 30. If the current air pressure fluctuates, it is determined that the orientation of the sealing nail 40 is the reverse nail, and there is an air leakage in the gap inside the adsorption part 10. Then the detection mechanism 30 can control the valve body 510 to disconnect, so that the corresponding sealing nail 40 adsorbed by the adsorption part 10 drops, avoiding sealing the sealing nail 40 with the reverse nail in the liquid injection hole, thereby completing the screening of the sealing nail 40 and improving the screening yield of the sealing nail 40.

[0079] It should be noted that the sealing nail screening device may further include components such as a robotic arm. Specifically, the sealing nail screening device may include more components than those described in the above embodiments, or combine certain components, or have different component arrangements.

[0080] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0081] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A sealing nail screening structure, characterized in that: include: An adsorption portion, the adsorption portion is used to adsorb the sealing nail, the sealing nail includes a head end portion and a tail end portion; A containing part, the containing part is connected to the adsorption part, and the containing part is used to be connected to the exhaust device; A detection mechanism is used to detect whether the adsorption portion adsorbs the head end or the tail end of the sealing pin.

2. The sealing nail screening structure according to claim 1, characterized in that: The adsorption part is provided with a first channel; the first channel has a first port and a second port; The first port is used for adsorbing the sealing pin, the second port is connected to the accommodating portion, and the detection mechanism is arranged adjacent to the second port.

3. The sealing nail screening structure according to claim 2, characterized in that: The area of ​​the first port is smaller than or equal to the area of ​​the tail end of the sealing pin; the area of ​​the first port is larger than the area of ​​the head end of the sealing pin.

4. The sealing nail screening structure according to claim 3, characterized in that: The longest inner diameter of the first port is greater than the longest diameter of the head end of the sealing pin.

5. The sealing nail screening structure according to claim 3, characterized in that: The first port is in a strip shape or a cross shape.

6. The sealing nail screening structure according to any one of claims 1 to 5, characterized in that: The detection mechanism includes an air pressure monitoring module, and the air pressure monitoring module is connected to the air extraction device; The air pressure monitoring module is also configured to control the start and stop of the air extraction device according to the detected current air pressure.

7. A sealing nail screening device, characterized in that: It comprises an air extraction device, a vibration plate and a sealing nail screening structure as claimed in any one of claims 1 to 6; the sealing nail screening structure is connected to the air extraction device; the vibration plate is used for preliminary screening of sealing nails; The sealing nail screening structure is used to absorb the sealing nails after the initial screening, and perform secondary screening on the sealing nails after the initial screening.

8. The sealing nail screening device according to claim 7, characterized in that: Also includes a limit column; The limiting column is used to accommodate the sealing nails after the preliminary screening and to limit the sealing nails after the preliminary screening.

9. The sealing nail screening device according to claim 8, characterized in that: The limiting column is provided with a second channel; the second channel has a third port and a fourth port; The third port is used to insert the sealing nail after the preliminary screening, so that the sealing nail after the preliminary screening is limited in the second channel; The fourth port is used to be inserted into the first port so as to absorb and remove the limited sealing nail through the first port.

10. The sealing nail screening device according to claim 7, characterized in that: The air extraction device is provided with a valve body; the valve body is connected to a detection mechanism.

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