Electrode pin and sealing installation device for battery cell

Abstract

The utility model discloses a kind of electric core liquid injection nail and sealing installation device, including nail body, valve core, air bag, vertical through inner chamber is provided in nail body, inner chamber is equipped with air inlet and air outlet, air bag is connected on the nail body at air outlet, valve core can be movably set on inner chamber and one end protrudes air outlet and enters air bag inner chamber, valve core moves down and can open air outlet, so that inner chamber and air bag inner chamber are communicated, valve core moves up and can close air outlet, so that inner chamber and air bag inner chamber are cut off;Sealing installation device includes grab head, air pipe and air needle.The utility model has the advantages that, the electric core liquid injection nail uses inflatable structure, air bag is inflated and expands, firmly sticks to the inner wall of liquid injection hole, guarantees the sealing effect of liquid injection hole, compared with the existing nail injection mode, nail body and liquid injection hole gap cooperation, without external force pressure, and then will not out pressure skew or the phenomenon that is not pressed into liquid injection hole, improve glue nail installation yield.

Description

Technical Field

[0001] This utility model relates to the field of battery cell technology, specifically to a battery cell liquid injection nail and sealing installation device. Background Technology

[0002] Sealing the filling port is a crucial step in the filling process. Filling pins are used to seal the filling port after the initial filling. After high-temperature immersion and before pre-charging, the filling pins are removed. Their function is to ensure the battery's sealing performance after filling, preventing external moisture and chemicals from corroding and damaging internal components during the cell's settling and formation processes, thereby improving battery life and stability. However, the insertion depth of existing filling pins is difficult to control. Inserting too deeply can damage the internal structure of the cell, affecting its safety performance; inserting too shallowly is not conducive to sealing. Currently, battery filling ports are sealed with rubber pins. For example, Chinese utility model patent document CN220873808U discloses a cell filling pin and cell cover plate device that uses rubber pins to seal the filling port. To ensure battery sealing, an interference fit is used between the rubber pin and the filling port. Therefore, the rubber pins often become misaligned or fail to be pressed into the filling port, reducing the installation yield of the rubber pins. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to improve the installation yield of adhesive nails.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A battery cell injection nail includes a nail body, a valve core, and an air bladder. The nail body has a vertically penetrating inner chamber with an air inlet and an air outlet. The air bladder is connected to the nail body at the air outlet. The valve core is movably mounted on the inner chamber with one end extending out of the air outlet and entering the air bladder's inner chamber. Moving the valve core downward opens the air outlet, connecting the inner chamber and the air bladder's inner chamber. Moving the valve core upward closes the air outlet, separating the inner chamber from the air bladder's inner chamber.

[0006] The battery cell injection nail adopts an inflatable structure. After the air bladder is inflated, it firmly adheres to the inner wall of the injection hole, ensuring the sealing effect of the injection hole. Compared with the existing injection nail method, the nail body and the injection hole are fitted with a gap, and no external force is required to press it. This prevents the phenomenon of being pressed out of place or not being able to be pressed into the injection hole, thus improving the installation yield of the glue nail.

[0007] Preferably, the outer wall of the nail at the top of the airbag is further provided with a first limiting part.

[0008] Preferably, a cap is connected to the end of the valve core near the air inlet.

[0009] Preferably, the cap body and the valve core are connected by threads.

[0010] Preferably, the cap body is fitted with a clearance fit to the inner wall of the cavity.

[0011] Preferably, a spring is fitted onto the valve core between the air outlet and the cap body.

[0012] Preferably, a second limiting part is provided on the inner wall of the air outlet, one end of the spring abuts against the cap body, and the other end abuts against the second limiting part.

[0013] Preferably, the valve core end that enters the airbag cavity is provided with a third limiting part, and the upward movement of the valve core can drive the third limiting part to cooperate with the second limiting part to close the air outlet.

[0014] Preferably, a groove is provided on the end face where the third limiting part mates with the second limiting part, and a sealing ring is provided in the groove.

[0015] This utility model also provides a sealing installation device for installing the above-mentioned battery cell liquid injection nail. The sealing installation device includes a gripper, an air tube, and an air needle. The gripper is used to grip the battery cell liquid injection nail, the air tube is connected to the air needle, and the air needle is used to connect to the nail body and is connected to the air inlet.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The battery cell injection nail adopts an inflatable structure. After the air bladder is inflated, it firmly adheres to the inner wall of the injection hole, ensuring the sealing effect of the injection hole. Compared with the existing injection nail method, the nail body and the injection hole are fitted with a gap, and no external force is required to press it. This prevents the phenomenon of being pressed crooked or not being able to be pressed into the injection hole, thus improving the installation yield of the glue nail.

[0018] 2. By releasing the gas from the air bladder in the installed battery cell injection nail, the air bladder separates from the inner wall of the injection hole, allowing the battery cell injection nail to be removed from the injection hole for reuse, thus reducing costs.

[0019] 3. By installing a sealed installation device, the workload of production line personnel can be reduced and the production capacity of equipment can be increased. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the battery cell injection nail in an embodiment of this utility model;

[0021] Figure 2 This is another structural schematic diagram of the battery cell injection nail according to an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the sealing installation device according to an embodiment of the present invention;

[0023] Figure 4 This is a partial structural schematic diagram of the sealing installation device according to an embodiment of the present utility model;

[0024] Figure 5 This is a partial structural diagram of the airbag in an embodiment of the present invention when it is not inflated;

[0025] Figure 6 This is a partial structural diagram of the airbag during inflation according to an embodiment of the present invention;

[0026] Figure 7 This is a partial structural diagram of the airbag after inflation according to an embodiment of the present invention.

[0027] In the diagram: 1. Nail body; 101. Inner chamber; 1011. Air inlet; 1012. Air outlet; 11. First limiting part; 12. Second limiting part; 2. Valve core; 21. Third limiting part; 3. Airbag; 4. Battery cover; 401. Liquid injection hole; 5. Cap body; 6. Spring; 7. Sealing ring; 8. Grip head; 9. Air tube; 10. Air needle. Detailed Implementation

[0028] To facilitate understanding of the technical solution of this utility model by those skilled in the art, the technical solution of this utility model will now be further described in conjunction with the accompanying drawings.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited.

[0031] See Figure 1 and Figure 2 This embodiment discloses a battery cell liquid injection nail, including a nail body 1, a valve core 2, and an air bag 3. The nail body 1 has a vertically penetrating inner chamber 101. The inner chamber 1 has an air inlet 1011 and an air outlet 1012. The air bag 3 is connected to the outer wall of the nail body 1 at the air outlet 1012. In this embodiment, the air bag 3 is connected to the outer wall of the nail body 1 by heat fusion. The valve core 2 is movably disposed on the inner chamber 101 and one end extends out of the air outlet 1012 and enters the inner cavity of the air bag 3.

[0032] The outer wall of the nail body 1 at the top of the airbag 3 is also provided with a first limiting part 11. The outer diameter of the first limiting part 11 is larger than the diameter of the injection hole 401, so as to ensure that the first limiting part 11 can fit on the battery cover plate 4 at the injection hole 401.

[0033] A cap 5 is threadedly connected to the end of the valve core 2 near the air inlet 1011. The cap 5 is clearance-fitted with the inner wall of the inner chamber 101, so that there is a gap between the cap 5 and the inner chamber 101 for ventilation.

[0034] The inner wall of the air outlet 1012 of the nail body 1 is provided with a second limiting part 12, and there is a gap between the second limiting part 12 and the outer wall of the valve core 2 for ventilation.

[0035] A spring 6, which is always in a compressed state, is fitted on the valve core 2 between the air outlet 1012 and the cap body 5. One end of the spring 6 abuts against the bottom surface of the cap body 5, and the other end abuts against the top surface of the second limiting part 12.

[0036] The valve core 2 that enters the inner cavity of the airbag 3 is provided with a third limiting part 21 that can cooperate with the second limiting part 12. A groove is provided on the end face of the third limiting part 21 that cooperates with the second limiting part 12, and a sealing ring 7 is provided in the groove.

[0037] Specifically, when the valve core 2 moves upward, it can drive the third limiting part 21 to move upward, so that the sealing ring 7 on the third limiting part 21 is sealed and fitted with the second limiting part 12, closing the air outlet 1012, thus separating the inner chamber 101 from the inner cavity of the airbag 3; when the valve core 2 moves downward, it can drive the third limiting part 21 to move downward, so that the third limiting part 21 moves away from the second limiting part 12, opening the air outlet 1012, thus connecting the inner chamber 101 with the inner cavity of the airbag 3.

[0038] It should be noted that in this embodiment, the nail body 1, the first limiting part 11, and the second limiting part 12 are all made of rubber. The airbag 3 is made of a relatively soft material. When not inflated, the airbag 3 and the injection hole 401 are in a clearance fit. After inflating, the airbag 3 expands and becomes an interference fit with the injection hole 401 to seal the injection hole 401.

[0039] See Figure 3 and Figure 4 In this embodiment, a sealing installation device is also provided for sealing the above-mentioned cell liquid injection nail on the liquid injection hole 401.

[0040] The sealing installation device includes a gripper 8, an air pipe 9, and an air needle 10. The gripper 8 is used to grip the battery cell injection nail. In this embodiment, the gripper 8 is a three-grip cylinder gripper. The air pipe 9 is connected to the air needle 10. The air needle 10 is used to connect the nail body 1 and is connected to the air inlet 1011.

[0041] Specifically, the sealing installation process of the battery cell injection pin is as follows: the injection pin is gripped by the gripper 8 and placed into the injection hole 401 on the battery cover plate 4. Both the pin body 1 and the non-ventilated airbag 3 are clearance-fitted into the injection hole 401, allowing them to be inserted. Because the outer diameter of the first limiting part 11 is larger than the diameter of the injection hole 401, the first limiting part 11 adheres to the battery cover plate 4 at the injection hole 401 (e.g., ...). Figure 5 (As shown), then retract the gripper head 8, connect the air needle 10 to the nail body 1 and connect it to the air inlet 1011, and ventilate through the air pipe 9. High-pressure gas is ejected from the air needle 10 and enters the inner chamber 1 through the air inlet 1011. The cap body 5 moves downward under the action of gas pressure, the spring 6 is compressed, the valve core 2 moves downward, causing the third limiting part 21 to move downward and away from the second limiting part 12. The sealing ring 7 separates from the second limiting part 12, opening the air outlet 1012, so that the inner chamber 101 and the inner cavity of the airbag 3 are connected. Gas enters the inner cavity of the airbag 3 from the air outlet 1012, the airbag 3 inflates, and presses against the inner wall of the injection hole 401 (as shown). Figure 6 (As shown), then the air in the air tube 9 is cut off, and the spring 6 automatically rebounds, causing the valve core 2 and the cap 5 to move upward, so that the sealing ring 7 on the third limiting part 21 seals against the second limiting part 12, closing the air outlet 1012, thus separating the inner chamber 101 from the inner chamber of the airbag 3 (as shown). Figure 7 As shown), complete the sealing connection between the cell injection nail and the injection hole 401, and remove the air needle 10 from the nail body 1.

[0042] In summary, the battery cell injection nail in this embodiment adopts an inflatable structure. After the air bladder 3 is inflated, it firmly adheres to the inner wall of the injection hole 401, ensuring the sealing effect of the injection hole 401. Compared with the existing injection nail method, the nail body 1 and the injection hole 401 are in a clearance fit, and no external force is required to press it. This avoids the phenomenon of being pressed crooked or unable to be pressed into the injection hole 401, thus improving the installation yield of the glue nail. In addition, by releasing the gas in the air bladder 3 in the installed battery cell injection nail, the air bladder 3 is separated from the inner wall of the injection hole 401, and the battery cell injection nail can be removed from the injection hole 401 for reuse, reducing costs.

[0043] In addition, the installation of sealed mounting devices can reduce the workload of production line personnel and increase equipment capacity.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] The above-described embodiments are merely examples of implementation methods of the utility model. The scope of protection of this utility model is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the scope of protection of this utility model.

Claims

1. A battery cell liquid injection nail, characterized in that: It includes a nail body, a valve core, and an air bladder. The nail body has a vertically penetrating inner chamber with an air inlet and an air outlet. The air bladder is connected to the nail body at the air outlet. The valve core is movably mounted on the inner chamber with one end extending out of the air outlet and entering the air bladder's inner cavity. Moving the valve core downward opens the air outlet, connecting the inner chamber and the air bladder's inner cavity. Moving the valve core upward closes the air outlet, separating the inner chamber from the air bladder's inner cavity.

2. The battery cell liquid injection nail according to claim 1, characterized in that: The outer wall of the nail at the top of the airbag is also provided with a first limiting part.

3. The battery cell liquid injection nail according to claim 1, characterized in that: A cap is connected to the end of the valve core near the air inlet.

4. The battery cell liquid injection nail according to claim 3, characterized in that: The cap body and the valve core are connected by threads.

5. The battery cell liquid injection nail according to claim 3, characterized in that: The cap body fits the inner wall of the cavity with a clearance.

6. The battery cell liquid injection nail according to claim 3, characterized in that: A spring is fitted onto the valve core between the air outlet and the cap body.

7. The battery cell liquid injection nail according to claim 6, characterized in that: The inner wall of the air outlet is provided with a second limiting part, one end of the spring abuts against the cap body, and the other end abuts against the second limiting part.

8. The battery cell liquid injection nail according to claim 7, characterized in that: The valve core that enters the airbag cavity is provided with a third limiting part at its end. When the valve core moves upward, it can drive the third limiting part to cooperate with the second limiting part to close the air outlet.

9. A battery cell liquid injection nail according to claim 8, characterized in that: A groove is provided on the end face of the third limiting part that mates with the second limiting part, and a sealing ring is provided in the groove.

10. A sealing installation device, characterized in that: For installing the battery cell liquid injection nail according to any one of claims 1-9, the sealing installation device includes a gripper, an air tube, and an air needle. The gripper is used to grip the battery cell liquid injection nail, the air tube is connected to the air needle, and the air needle is used to connect to the nail body and is connected to the air inlet.

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