Helium return nailing mechanism

Abstract

The present invention provides a helium return nailing mechanism, including a mounting body, a first channel is arranged in the mounting body; at least part of the nail pressing assembly is movably arranged in the first channel, so that the glue nail in the first channel can be pushed to a predetermined position by the nail pressing assembly; a second channel is arranged in the mounting body and is connected to the first channel, and the glue nail is sent into the first channel through the second channel; a first air vent is arranged on the mounting body and is connected to the first channel, and the straight line where the center line of the first air vent is located is located below the second channel; a second air vent is arranged on the mounting body and is connected to the first channel, and the straight line where the center line of the second air vent is located is located above the second channel, so that air can be blown into the first channel respectively through the first air vent and the second air vent. The present application solves the problem that the helium return nailing mechanism in the prior art is easy to bring electrolyte gas into the interior of the mechanism during the vacuuming process, which causes the mechanism to be easily aged and reduces the service life of the mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of helium return sealing of secondary liquid injection of ion batteries, and in particular to a helium return nailing mechanism. Background Art

[0002] In the production process of lithium-ion batteries, the battery helium return process is an important quality control link. The battery's sealing performance is judged by injecting helium inside the battery and monitoring its leakage. The main process flow includes primary helium inspection, secondary liquid injection, sealing pin welding and secondary helium inspection.

[0003] At present, the sealing nail welding process mostly adopts two steps, first pre-pressing the nail, and then fully pressing the nail. The principle of this process is: the head of the sealing nail adopts the form of three-sided missing corners, commonly known as three-edged nails. When the pre-pressing nail is inserted into a part of the head, there are three small notches on the sides of the injection port. The full-pressing nail station is vacuumed and then helium is returned. After the helium return is completed, the sealing nail is completely pressed in to seal the injection port. Because the pre-pressing nail and the full-pressing nail are separated, the equipment occupies a large space. During the pre-pressing process, the incoming size of the sealing nail is required to be high, and the stroke needs to be accurately controlled. If the pressure is too little, the pre-pressing nail is not firm, and there is a risk of the nail falling during transportation. If the pressure is too much, the battery will be directly sealed, and helium cannot be returned during full-pressing nails.

[0004] In the prior art, in order to solve the above technical problems, the sealing step is simplified by moving the sealing nail horizontally to the top of the liquid injection port and then directly pressing the nail down to the liquid injection port for sealing.

[0005] However, in the existing structure, during the process of evacuating the battery, the electrolyte gas is easily brought into the moving channel of the rubber nail, and the electrolyte gas will corrode the inside of the nailing mechanism, thereby causing the structure to age easily and reducing its service life. Summary of the invention

[0006] The main purpose of the present invention is to provide a helium return nailing mechanism to solve the problem that the helium return nailing mechanism in the prior art is easy to bring electrolyte gas into the mechanism during the vacuum pumping process, causing the mechanism to be easily aged and reducing the service life of the mechanism.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a helium return nailing mechanism, including: an installation body, a first channel is arranged in the installation body, and the first channel extends along a first direction; a nail pressing assembly, at least part of which is movably arranged in the first channel, so that the glue nails in the first channel can be pushed to a predetermined position by the nail pressing assembly; a second channel is arranged in the installation body, the second channel extends along a second direction, a first angle is formed between the first direction and the second direction, the second channel is connected to the first channel, and the glue nails are sent into the first channel through the second channel; a first air vent is arranged on the installation body and connected to the first channel, and the straight line where the center line of the first air vent is located is located below the second channel; a second air vent is arranged on the installation body and connected to the first channel, and the straight line where the center line of the second air vent is located is located above the second channel, so that air can be blown into the first channel through the first air vent and the second air vent respectively.

[0008] Further, the air flow cross-sectional area of ​​the second vent is greater than that of the first vent; or the flow velocity of the air flow in the second vent is greater than that in the first vent.

[0009] Furthermore, the helium return nailing mechanism also includes: a feeding component, at least a portion of which is arranged in the second channel, and the feeding component is movably arranged along the extension direction of the second channel so that the feeding component is in a feeding position or a material taking position; a sealing component, at least a portion of which is arranged between the feeding component and the channel wall of the second channel, and when the feeding component is in the feeding position, the sealing component is respectively fitted with the feeding component and the second channel; wherein an avoidance channel section is arranged in the second channel, and at least a portion of the feeding component is gap-matched with the avoidance channel section, so that the feeding component is purged through the avoidance channel section during the process of blowing air into the first channel through the second air vent.

[0010] Furthermore, the feeding assembly includes: a feeding rod, on which a feeding channel is provided, and the feeding channel is used to accommodate glue nails; the feeding rod is movably arranged along the extension direction of the second channel so that the feeding channel is connected to or staggered with the first channel; the sealing component includes a first seal and a second seal, and the first seal and the second seal are respectively embedded in the feeding rod and located on both sides of the feeding channel.

[0011] Furthermore, a first sealing boss and a second sealing boss are provided in the second channel, and the first sealing boss and the second sealing boss respectively protrude from the inner wall surface of the second channel toward the middle of the second channel, and the first sealing boss and the second sealing boss are spaced apart along the extension direction of the second channel, and the avoidance channel section is provided between the first sealing boss and the second sealing boss; the first sealing component is fitted with the first sealing boss, and the second sealing component is fitted with the second sealing boss, so as to purge the feeding rod during the process of blowing air into the first channel through the second air vent.

[0012] Furthermore, a first mounting groove and a second mounting groove are provided on the feeding rod, the first mounting groove and the second mounting groove are respectively located on both sides of the feeding channel, the first sealing component is embedded in the first mounting groove, and the second sealing component is embedded in the second mounting groove.

[0013] Furthermore, the helium return nailing mechanism also includes: a third channel, which is arranged in the installation body, the third channel is opposite to the feeding channel, so that the feeding rod is in a material picking position; a position detection component, which is arranged in the first channel, the position detection component is opposite to the feeding channel to detect the position information of the glue nail in the feeding channel.

[0014] Furthermore, the feeding assembly also includes: a first driving member, which is arranged on the mounting body, and the first driving member is drivingly connected to the feeding rod to drive the feeding rod to move toward the feeding position; an elastic member, which is arranged in the mounting body and is located at an end of the feeding rod away from the first driving member, and the feeding rod is pushed toward the material picking position by the elastic restoring force of the elastic member.

[0015] Furthermore, a limiting end face is provided at the end of the feeding rod, and at least a part of the limiting end face is a plane or an inclined surface; the helium return nailing mechanism also includes: a limiting channel, which is provided in the installation body and connected to the second channel, and the end of the feeding rod is inserted in the limiting channel, and at least a part of the limiting end face is in contact with the inner wall surface of the limiting channel, so as to limit the feeding rod during the movement of the feeding rod.

[0016] Furthermore, the nail pressing assembly includes: a pressing rod, which is arranged in the first channel, and the pressing rod is movably arranged along the extension direction of the first channel to press the glue nail into a predetermined position; the helium return nailing mechanism also includes: a third sealing member, which is arranged between the pressing rod and the first channel, and the third sealing member is respectively in contact with the pressing rod and the inner wall surface of the first channel.

[0017] By applying the technical solution of the present invention, in the helium return nailing mechanism, a first channel and a second channel are provided in the installation body, the first channel extends in the first direction, the second channel extends in the second direction, and there is a first angle between the first direction and the second direction. After the glue nail is sent into the first channel through the second channel, the battery body is vacuumed through the first vent, and then helium is injected into the battery body through the first vent and the second vent. After the helium injection is completed, the pressing nail assembly presses the glue nail into the injection port of the battery body to complete the sealing of the battery injection port. Compared with the method of only setting one vent in the prior art, the second vent is provided in the present application, so that the first channel and the second channel can be purged during the helium injection process, so as to clean the first channel and the second channel, and the electrolyte gas brought into the first channel and the second channel during the vacuuming process is blown back into the battery body, which solves the problem that the helium return nailing mechanism in the prior art is easy to bring electrolyte gas into the mechanism during the vacuuming process, causing the mechanism to age easily and reducing the service life of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of an embodiment of a helium return nailing mechanism according to the present invention is shown;

[0020] Figure 2 A side view of the helium return nailing mechanism according to the present invention is shown;

[0021] Figure 3 A schematic diagram showing a feeding assembly in a helium return nailing mechanism according to the present invention in a material taking position;

[0022] Figure 4 A schematic diagram showing the cooperation between the second channel and the feeding rod in the helium return nailing mechanism according to the present invention is shown;

[0023] Figure 5 A schematic diagram showing a feeding assembly in a helium return nailing mechanism according to the present invention in a feeding position;

[0024] Figure 6 A schematic diagram showing the coordination between the limiting end surface and the limiting channel in the helium return nailing mechanism according to the present invention is shown.

[0025] The above drawings include the following reference numerals:

[0026] 100, installation body; 110, first channel; 200, press nail assembly; 120, second channel; 300, first vent; 400, second vent; 500, feeding assembly; 600, sealing component; 510, feeding rod; 511, feeding channel; 610, first sealing component; 620, second sealing component; 512, first installation groove; 513, second installation groove; 130, third channel; 700, position detection component; 52 0, first driving member; 530, elastic member; 514, limiting end face; 140, limiting channel; 630, third sealing member; 800, supporting body; 810, fourth channel; 640, fourth sealing member; 650, fifth sealing member; 210, pressing rod; 220, second driving member; 1201, avoidance channel section; 1202, first sealing boss; 1203, second sealing boss; 910, battery cell body; 920, material conveying pipe. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] As mentioned in the background technology, during the battery helium return process, it is necessary to use the liquid injection port on the battery cell for vacuum treatment. At this time, the helium return pressure nailing device is pressed on the battery cell. This makes it easy to draw the electrolyte gas into the inside of the helium return pressure nailing device during the vacuum process, causing pollution to the equipment. In addition, since the electrolyte has a certain corrosiveness, it is easy to cause equipment aging when it adheres to the inside of the equipment, which reduces the service life of the helium return pressure nailing mechanism. Therefore, in response to the above technical problems, in the helium return nailing mechanism provided by the present application, a first air vent 300 and a second air vent 400 are provided on the installation body 100, and the straight line where the center line of the first air vent 300 is located is located below the second channel 120, and the straight line where the center line of the second air vent 400 is located is located above the second channel 120. The first air vent 300 and the second air vent 400 are respectively connected to the first channel 110, so that the battery body is vacuumed using the first air vent 300, and then the first air vent 400 is used to vacuum the battery body. The first channel 110 and the second channel 120 are filled with helium respectively. During this process, the gas in the second air vent 400 can flow through the first channel 110 and the second channel 120 and then merge with the gas in the first air vent 300, thereby achieving the purge of the first channel 110 and the second channel 120, and blowing the electrolyte gas brought into the first channel 110 and the second channel 120 during the vacuuming process back into the battery cell body, thereby achieving the cleaning of the first channel 110 and the second channel 120, thereby improving the service life of the helium return nail pressing equipment.

[0029] Please refer to Figures 1 to 5The present invention provides a helium-return nailing mechanism, comprising: a mounting body 100, wherein a first channel 110 is arranged in the mounting body 100, and the first channel 110 extends along a first direction; a nail pressing assembly 200, wherein at least a portion of the nail pressing assembly 200 is movably arranged in the first channel 110, so that the nails in the first channel 110 are pushed to a predetermined position by the nail pressing assembly 200; a second channel 120 is arranged in the mounting body 100, and the second channel 120 extends along a second direction, and a first angle is formed between the first direction and the second direction, and the second channel 120 is angularly spaced from the first direction and the second direction. A channel 110 is connected, and the glue nail is sent into the first channel 110 through the second channel 120; the first air vent 300 is arranged on the installation body 100 and is connected to the first channel 110, and the straight line where the center line of the first air vent 300 is located is located below the second channel 120; the second air vent 400 is arranged on the installation body 100 and is connected to the first channel 110, and the straight line where the center line of the second air vent 400 is located is located above the second channel 120, so as to blow air into the first channel 110 through the first air vent 300 and the second air vent 400 respectively.

[0030] According to the helium return nailing mechanism provided in the present application, it includes an installation body 100, a pressure nail assembly 200, a first vent 300 and a second vent 400. The installation body 100 is provided with a first channel 110 and a second channel 120 that are interconnected. The first channel 110 extends along a first direction, and the second channel 120 extends along a second direction. There is a first angle between the first direction and the second direction, and the first angle is preferably 90°. After the glue nail is sent into the first channel 110 through the second channel 120, the battery cell body is vacuumed through the first vent 300, and then helium is injected into the battery cell body through the first vent 300 and the second vent 400. After the helium injection is completed, the pressure nail assembly 200 presses the glue nail into the liquid injection port of the battery cell body to complete the sealing of the battery cell liquid injection port. Compared with the method of setting only one vent in the prior art, the present application sets a second vent 400, so that the first channel 110 and the second channel 120 can be purged during the injection of helium, thereby cleaning the first channel 110 and the second channel 120, and blowing the electrolyte gas brought into the first channel 110 and the second channel 120 during the vacuuming process back into the battery cell body, thereby solving the problem in the prior art that the helium return nailing mechanism is prone to bring electrolyte gas into the interior of the mechanism during the vacuuming process, causing the mechanism to be easily aged and reducing the service life of the mechanism.

[0031] Specifically, in order to improve the cleaning effect on the inside of the installation body 100, the airflow cross-sectional area of ​​the second vent 400 is larger than the airflow cross-sectional area of ​​the first vent 300; or, the flow rate of the airflow in the second vent 400 is larger than the flow rate of the airflow in the first vent 300. Such a setting can ensure that the pressure of the helium gas introduced into the second vent 400 is greater than the pressure of the helium gas introduced into the first vent 300, so that the helium gas introduced into the second vent 400 is swept downward to merge with the helium gas introduced into the first vent 300, and the helium gas blown into the first vent 300 is prevented from flowing back toward the second vent 400, resulting in the failure to clean the first channel 110 and the second channel 120.

[0032] In the specific implementation process, Figure 3 and Figure 5 As shown, the helium return nailing mechanism also includes: a feeding component 500, at least a portion of which is arranged in the second channel 120, and the feeding component 500 is movably arranged along the extension direction of the second channel 120, so that the feeding component 500 is in a feeding position or a material taking position; a sealing component 600, at least a portion of which is arranged between the feeding component 500 and the channel wall of the second channel 120, and when the feeding component 500 is in the feeding position, the sealing component 600 is respectively fitted with the feeding component 500 and the second channel 120; wherein, an avoidance channel section 1201 is provided in the second channel 120, and at least a portion of the feeding component 500 is gap-matched with the avoidance channel section 1201, so that in the process of blowing air into the first channel 110 through the second vent 400, the feeding component 500 is purged through the avoidance channel section 1201. By providing the sealing component 600, when the feeding assembly 500 is in the feeding position, the sealing of the second channel 120 is maintained during the vacuuming and helium returning processes. Specifically, when returning helium, the helium introduced into the second vent 400 is prevented from overflowing in the second channel 120. By providing the avoidance channel section 1201, it is possible to blow the inner wall surface of the second channel 120 and the surface of the feeding assembly 500, thereby cleaning the feeding assembly 500.

[0033] Specifically, in the present application, the feeding assembly 500 includes: a feeding rod 510, on which a feeding channel 511 is provided, and the feeding channel 511 is used to accommodate glue nails; the feeding rod 510 is movably arranged along the extension direction of the second channel 120 so that the feeding channel 511 is connected to or staggered with the first channel 110; the sealing component 600 includes a first seal 610 and a second seal 620, and the first seal 610 and the second seal 620 are respectively embedded in the feeding rod 510 and located on both sides of the feeding channel 511. When the feeding assembly 500 is in the feeding position, the feeding channel 511 is connected to the first channel 110. At this time, the first sealing member 610 and the second sealing member 620 are respectively fitted with the inner wall surface of the second channel 120 to seal the avoidance channel section 1201. During the process of evacuating or returning helium, a sealed environment is maintained in the avoidance channel section 1201. At the same time, the feeding rod 510 can be purged by using the avoidance channel section 1201.

[0034] Among them, Figure 4 As shown, a first sealing boss 1202 and a second sealing boss 1203 are provided in the second channel 120, and the first sealing boss 1202 and the second sealing boss 1203 respectively protrude from the inner wall surface of the second channel 120 toward the middle of the second channel 120, and the first sealing boss 1202 and the second sealing boss 1203 are spaced apart along the extension direction of the second channel 120, and the avoidance channel section 1201 is provided between the first sealing boss 1202 and the second sealing boss 1203; the first sealing component 610 is fitted with the first sealing boss 1202, and the second sealing component 620 is fitted with the second sealing boss 1203, so as to purge the feeding rod 510 during the process of blowing air into the first channel 110 through the second air vent 400. By setting the first sealing boss 1202 and the second sealing boss 1203, the first sealing member 610 cooperates with the first sealing boss 1202 to achieve sealing, and the second sealing member 620 cooperates with the second sealing boss 1203 to achieve sealing, so that the feeding rod 510 is in the feeding position, and an avoidance channel section 1201 is formed between the first sealing boss 1202 and the second sealing boss 1203, and a space for air flow is formed between the avoidance channel section 1201 and the feeding rod 510, thereby ensuring that the helium introduced through the second vent 400 can eventually flow into the battery cell body.

[0035] Preferably, the radial cross-section of the first sealing boss 1202 and the second sealing boss 1203 along the second channel 120 is trapezoidal, or, the first sealing boss 1202 and the second sealing boss 1203 are respectively provided with interconnected contact surfaces and guide surfaces, the contact surfaces are in contact with the first seal 610 and the second seal 620, and there is a second angle between the guide surface and the contact surface, and the second angle is an obtuse angle. In this way, during the movement of the feeding rod 510, the first seal 610 and the second seal 620 move to the contact surface under the guidance of the guide surface and fit the contact surface, which can reduce the resistance encountered by the feeding rod 510 during the movement and extend the service life of the first / second seal.

[0036] Specifically, in order to facilitate the installation of the first seal 610 and the second seal 620 on the feeding rod 510, the feeding rod 510 is provided with a first mounting groove 512 and a second mounting groove 513, which are respectively located on both sides of the feeding channel 511, and the first seal 610 is embedded in the first mounting groove 512, and the second seal 620 is embedded in the second mounting groove 513. In this way, not only the first seal 610 and the second seal 620 play a good sealing role, but also the first seal 610 and the second seal 620 can be prevented from falling off during the movement of the feeding rod 510.

[0037] like Figure 3 and Figure 5 As shown, the helium return nailing mechanism also includes: a third channel 130, which is arranged in the installation body 100, and the third channel 130 is opposite to the feeding channel 511, so that the feeding rod 510 is in the material taking position; a position detection component 700, which is arranged in the first channel 110, and the position detection component 700 is opposite to the feeding channel 511, so as to detect the position information of the glue nail in the feeding channel 511. Among them, the helium return nailing mechanism also includes a feeding pipe 920, and the feeding pipe 920 is connected with the third channel 130. After the glue nail is transported to the third channel 130 by the feeding pipe 920, it falls into the feeding channel 511. When the position detection component 700 detects the presence of glue nails, the loading is completed. Preferably, the position detection component 700 is a light sensor.

[0038] like Figure 3As shown, the feeding assembly 500 also includes: a first driving member 520, which is arranged on the installation body 100, and the first driving member 520 is drivingly connected to the feeding rod 510 to drive the feeding rod 510 to move toward the feeding position; an elastic member 530, which is arranged in the installation body 100 and is located at one end of the feeding rod 510 away from the first driving member 520, and the feeding rod 510 is pushed to move toward the material picking position by the elastic restoring force of the elastic member 530. Among them, the first driving member 520 includes a piston rod, at least part of which is inserted into the second channel 120 and drivenly connected to the connecting end of the feeding rod 510. A fourth channel connected to the second channel 120 is also provided in the installation body 100. The connecting end of the feeding rod 510 and at least part of the piston rod are arranged in the fourth channel. The connecting end of the feeding rod 510 and the second channel 120 are gap-matched. In this way, when the feeding rod 510 is in the material picking position, the glue nails are blown into the feeding channel 511 through the airflow. In order to make the airflow flow smoothly, a gap is left between the connecting end of the feeding rod 510 and the second channel 120, so that the airflow blown into the third channel 130 is discharged along the gap and the fourth channel. The elastic component 530 is preferably a spring. In the process of driving the feeding rod 510 to move to the feeding position, the spring is gradually compressed. At this time, the thrust of the piston rod is buffered, which can improve the positioning accuracy of the feeding rod 510. After the nail pressing is completed, the elastic restoring force of the spring and the pulling force of the piston rod are used to jointly drive the feeding rod 510 to move to the material picking position.

[0039] In the specific implementation process, Figure 6 As shown, the end of the feeding rod 510 is provided with a limited end surface 514, and at least a part of the limited end surface 514 is a plane or an inclined surface; the helium return nailing mechanism also includes: a limited channel 140, which is arranged in the installation body 100 and communicated with the second channel 120, and the end of the feeding rod 510 is inserted in the limited channel 140, and at least a part of the limited end surface 514 is in contact with the inner wall surface of the limited channel 140, so as to limit the feeding rod 510 during the movement of the feeding rod 510. Such a setting can prevent the feeding rod 510 from rotating or the movement trajectory from deviating during the reciprocating movement along the second channel 120, resulting in the feeding channel 511 being unable to communicate with the first channel 110, affecting the feeding.

[0040] Preferably, the cross section of the second channel 120 is circular, and the feeding rod 510 is a cylindrical structure, or the cross section of the second channel 120 is a prismatic structure, and the feeding rod 510 is a prismatic structure adapted to the second channel 120. When the feeding rod 510 is a prismatic structure, there is no need to set the limiting channel 140 to limit the feeding rod 510.

[0041] In actual application, the nail pressing assembly 200 includes: a pressing rod 210, which is arranged in the first channel 110, and the pressing rod 210 is movably arranged along the extension direction of the first channel 110 to press the glue nail into a predetermined position; the helium return nailing mechanism also includes: a third sealing member 630, which is arranged between the pressing rod 210 and the first channel 110, and the third sealing member 630 is respectively fitted with the inner wall surface of the pressing rod 210 and the first channel 110. By setting the third sealing member 630, the space environment in the first channel 110 is sealed, and the first sealing member 610 and the second sealing member 620 are cooperated to ensure the overall sealing of the airflow flow space during the vacuum or helium return process. Preferably, the pressing rod 210 is a ceramic pressing rod.

[0042] The nail pressing assembly 200 further includes a second driving member 220, which is drivingly connected to the pressing rod 210, and drives the pressing rod 210 to move along the extension direction of the first channel 110 through the second driving member 220. Preferably, the second driving member 220 is a servo motor or a driving cylinder.

[0043] The helium return nailing mechanism also includes: a support body 800, which is arranged below the installation body 100 and connected to the installation body 100, and a fourth channel 810 connected to the first channel 110 is arranged on the support body 800, and the glue nail passes through the first channel 110 and the fourth channel 810 in sequence and is installed to a predetermined position; a fourth sealing member 640, which is arranged between the support body 800 and the installation body 100, and the fourth sealing member 640 is respectively fitted with the support body 800 and the installation body 100; a fifth sealing member 650, which is arranged on the support body 800 and away from one end of the installation body 100, and the fifth sealing member 650 is used to fit with the battery cell body. When the cell body 910 reaches the helium return nailing station and completes positioning, the helium return nailing mechanism is pressed down, the cell injection port and the fifth seal 650 are closely fitted to ensure sealing, and the fourth seal 640 ensures the sealing between the support body 800 and the installation body 100, and the first seal 610, the second seal 620 and the third seal 630 are combined to form a sealed environment in the first channel 110 and the second channel 120. Preferably, the first seal 610, the second seal 620, the third seal 630 and the fourth seal 640 are all O-rings.

[0044] In the specific application process, the following steps are included:

[0045] (1) Before the battery cell is fed, the sealant nails are fed from the front nail feeding mechanism through the third channel 130 into the feeding channel 511 of the feeding rod 510, and then pass through the optical fiber sensor to detect that the sealant nails have been prepared. After confirming that they are in place, the first driving member 520 pushes the feeding rod 510 to move the sealant nails horizontally to the left position (such as Figure 5 as shown).

[0046] (2) The battery cell arrives at the helium return pinning station and is positioned. The helium return pinning mechanism is pressed down, and the battery cell injection port is tightly fitted with the fifth seal 650 to ensure sealing. A sealed environment is formed under the fifth seal 650, the fourth seal 640, the first seal 610, the second seal 620 and the third seal 630.

[0047] (3) Through the first vent 300, first evacuate to the set value and test the sealing of the entire system. The first vent 300 is below the feeding rod 510 and is designed with a safe distance, so that when evacuating, even if electrolyte is drawn out from the battery cell, it can also flow out through the pipe of the first vent 300 and will not "contaminate" the feeding rod 510. Even if electrolyte is drawn out, only a small part of it will adhere to the feeding rod 510 or the second channel 120, which can reduce the risk of the sealing ring on the feeding rod 510 being contaminated with electrolyte and increase the service life of the mechanism.

[0048] (4) After the sealing is confirmed, the vacuum circuit is switched to a helium source, and helium is then injected through the first vent 300 and the second vent 400. When the set helium value is reached, the first vent 300 and the second vent 400 are closed. The second vent 400 is located at the upper part of the feeding rod 510. After the helium is injected, the helium can be used to further clean the volatilized electrolyte gas in the feeding rod 510, thereby further improving the service life of the mechanism.

[0049] (5) After the helium return is completed, the ceramic pressure rod is controlled to descend by the servo motor. At this time, the sealing nail is moved to the left by the feeding rod 510 and has been sent to the feeding channel 511 just above the liquid filling port. The ceramic pressure rod descends and pushes the sealing nail until the sealing nail is completely immersed in the battery liquid filling port, completing the sealing of the battery liquid filling port.

[0050] (6) After the sealant nail is completely pressed into the liquid injection port, the helium return pressing mechanism is lifted, and the ceramic pressing rod rises synchronously. After completion, the first driving member 520 moves rightward, driving the feeding rod 510 to move rightward.

[0051] (7) When the mechanical gripper is transferring the battery cell, the equipment can execute the above-mentioned (1) synchronous action to complete the nail preparation. After waiting for the battery cell transfer and positioning to be completed, it can execute (2) to (6) steps to achieve the continuous operation of returning to helium and fully pressing the nail.

[0052] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0053] According to the helium return nailing mechanism provided in the present application, it includes an installation body 100, a pressure nail assembly 200, a first vent 300 and a second vent 400. The installation body 100 is provided with a first channel 110 and a second channel 120 that are interconnected. The first channel 110 extends along a first direction, and the second channel 120 extends along a second direction. There is a first angle between the first direction and the second direction, and the first angle is preferably 90°. After the glue nail is sent into the first channel 110 through the second channel 120, the battery cell body is vacuumed through the first vent 300, and then helium is injected into the battery cell body through the first vent 300 and the second vent 400. After the helium injection is completed, the pressure nail assembly 200 presses the glue nail into the liquid injection port of the battery cell body to complete the sealing of the battery cell liquid injection port. Compared with the method of setting only one vent in the prior art, the present application sets a second vent 400, so that the first channel 110 and the second channel 120 can be purged during the injection of helium, thereby cleaning the first channel 110 and the second channel 120, and blowing the electrolyte gas brought into the first channel 110 and the second channel 120 during the vacuuming process back into the battery cell body, thereby solving the problem in the prior art that the helium return nailing mechanism is prone to bring electrolyte gas into the interior of the mechanism during the vacuuming process, causing the mechanism to be easily aged and reducing the service life of the mechanism.

[0054] In addition, by using the above technical scheme, the pre-pressing nail mechanism is cancelled, and the pressing nail is completed at one time after the helium return, which eliminates the risk of the existing pre-pressing nails falling during the transportation of the battery cell, and if the sealant is pressed down too much after the pre-pressing nails, the battery will be directly sealed, and the real helium return cannot be achieved at the full pressing nail station, and the helium reserve inside the battery cannot be ensured; compared with the existing technology, after the battery cell is vacuumed and helium is returned, the pre-prepared nails are pressed into the liquid filling port at one time by the ceramic pressure rod, which eliminates the poor pressing nails of the pre-pressing nails that lead to poor helium return pressing nails; this mechanism has low cost, small footprint, simple structure and movement, and improves the equipment optimization rate. Under the premise of not reducing the working efficiency of the equipment, it can complete the helium return and full pressing nail operations at one station, and can avoid the sealing nails blocking the liquid filling port before vacuum helium return, effectively ensuring the helium reserve inside the battery.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A helium return nailing mechanism, characterized in that: include: An installation body (100), wherein a first channel (110) is provided in the installation body (100), and the first channel (110) extends along a first direction; A nail pressing assembly (200), at least a portion of which is movably disposed in the first channel (110), so that the nail pressing assembly (200) can push the plastic nail in the first channel (110) to a predetermined position; a second channel (120) disposed in the installation body (100), the second channel (120) extending along a second direction, the first direction and the second direction having a first angle, the second channel (120) being connected to the first channel (110), and the glue nail being fed into the first channel (110) through the second channel (120); A first vent (300) is arranged on the installation body (100) and is in communication with the first channel (110), wherein the center line of the first vent (300) is located below the second channel (120); A second vent (400) is provided on the installation body (100) and is in communication with the first channel (110), wherein the center line of the second vent (400) is located above the second channel (120), so that air can be blown into the first channel (110) through the first vent (300) and the second vent (400) respectively; A feeding assembly (500), at least a portion of which is disposed in the second channel (120), and the feeding assembly (500) is movably disposed along an extension direction of the second channel (120) so that the feeding assembly (500) is in a feeding position or a material taking position; a sealing component (600) at least partially disposed between the feeding component (500) and a channel wall surface of the second channel (120); when the feeding component (500) is in the feeding position, the sealing component (600) is respectively in contact with the feeding component (500) and the second channel (120); wherein an avoidance channel section (1201) is provided in the second channel (120), and at least a portion of the feeding assembly (500) is clearance-matched with the avoidance channel section (1201), so that when air is blown into the first channel (110) through the second vent (400), the feeding assembly (500) is purged through the avoidance channel section (1201); The feeding assembly (500) comprises: a feeding rod (510), the feeding rod (510) being provided with a feeding channel (511), the feeding channel (511) being used to accommodate plastic nails; the feeding rod (510) being movably arranged along the extension direction of the second channel (120) so that the feeding channel (511) is connected to or staggered with the first channel (110); The sealing component (600) comprises a first sealing component (610) and a second sealing component (620), wherein the first sealing component (610) and the second sealing component (620) are respectively embedded in the feeding rod (510) and located on both sides of the feeding channel (511); The helium return nailing mechanism further comprises: a third channel (130) disposed in the installation body (100), the third channel (130) being opposite to the feeding channel (511), so that the feeding rod (510) is in a material taking position; a position detection component (700) disposed in the first channel (110), the position detection component (700) being opposite to the feeding channel (511) so as to detect position information of the glue nail in the feeding channel (511); The nail pressing assembly (200) comprises: A pressing rod (210) is arranged in the first channel (110), and the pressing rod (210) is movably arranged along the extension direction of the first channel (110) to press the plastic nail into a predetermined position; The helium return nailing mechanism also includes: The third sealing member (630) is arranged between the pressing rod (210) and the first channel (110), and the third sealing member (630) is respectively in contact with the inner wall surfaces of the pressing rod (210) and the first channel (110).

2. The helium return nailing mechanism according to claim 1, characterized in that: The airflow cross-sectional area of ​​the second vent (400) is greater than the airflow cross-sectional area of ​​the first vent (300); or, The flow rate of the airflow in the second vent (400) is greater than the flow rate of the airflow in the first vent (300).

3. The helium return nailing mechanism according to claim 1, characterized in that: A first sealing boss (1202) and a second sealing boss (1203) are arranged in the second channel (120); the first sealing boss (1202) and the second sealing boss (1203) respectively protrude from the inner wall surface of the second channel (120) towards the middle of the second channel (120); the first sealing boss (1202) and the second sealing boss (1203) are arranged at intervals along the extension direction of the second channel (120); and the avoidance channel section (1201) is arranged between the first sealing boss (1202) and the second sealing boss (1203); The first sealing member (610) is fitted with the first sealing boss (1202), and the second sealing member (620) is fitted with the second sealing boss (1203), so that the feeding rod (510) is purged during the process of blowing air into the first channel (110) through the second vent (400).

4. The helium return nailing mechanism according to claim 1, characterized in that: The feeding rod (510) is provided with a first mounting groove (512) and a second mounting groove (513); the first mounting groove (512) and the second mounting groove (513) are respectively located on two sides of the feeding channel (511); the first sealing component (610) is embedded in the first mounting groove (512); and the second sealing component (620) is embedded in the second mounting groove (513).

5. The helium return nailing mechanism according to claim 1, characterized in that: The feeding assembly (500) further comprises: A first driving member (520) is arranged on the mounting body (100), the first driving member (520) being drivingly connected to the feeding rod member (510) so as to drive the feeding rod member (510) to move towards a feeding position; An elastic component (530) is arranged in the installation body (100) and is located at an end of the feeding rod (510) away from the first driving member (520), and pushes the feeding rod (510) to move toward a material taking position through the elastic restoring force of the elastic component (530).

6. The helium return nailing mechanism according to claim 1, characterized in that: The end of the feeding rod (510) is provided with a limiting end surface (514), and at least a part of the limiting end surface (514) is a plane or an inclined surface; the helium return nailing mechanism further comprises: A limiting channel (140) is arranged in the installation body (100) and communicated with the second channel (120); the end of the feeding rod (510) is inserted into the limiting channel (140); at least a portion of the limiting end surface (514) is in contact with the inner wall surface of the limiting channel (140) so as to limit the feeding rod (510) during the movement of the feeding rod (510).

Images