Battery grabbing device and battery transfer jig

Abstract

The utility model discloses a battery grabbing device and a battery transfer jig, and relates to the technical field of battery production. The battery grabbing device comprises a grabbing body and a plugging assembly, the grabbing body comprises a driving mechanism and a clamping jaw, the clamping jaw is connected with the driving mechanism, and the driving mechanism is used for driving the clamping jaw to be switched between the mode of grabbing a single battery and the mode of loosening the single battery; the plugging assembly comprises a plug, the plug is connected with the driving mechanism and located in an area defined by the clamping jaws, and the plug is used for plugging a liquid injection hole of the single battery.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and more specifically, to a battery gripping device and a battery transfer fixture. Background Technology

[0002] A rechargeable battery, also known as a secondary battery or storage battery, is a battery that can be recharged after being discharged to reactivate its active materials and continue to be used. The recyclable nature of rechargeable batteries has made them a primary power source for electrical devices. As the demand for rechargeable batteries increases, people are also placing higher demands on their performance in various aspects, especially their lifespan.

[0003] In related technologies, secondary batteries typically consist of a casing, electrode assembly, and end cap assembly. The actual production process involves fabricating the casing, electrode assembly, and end cap assembly separately. Then, metal adapters are used to weld the electrode terminals and tabs of the end cap assembly to the casing. The electrode assembly is then placed inside the casing, and the end cap assembly is used to seal the opening of the casing, forming the basic structure of the secondary battery. Finally, electrolyte is manually injected through injection holes located on the end cap assembly, and these injection holes are sealed afterward.

[0004] In the production process of secondary batteries, there are multiple assembly stations where the batteries are transferred between each other. These include stations such as the end cap assembly station for sealing the opening of the casing, the electrolyte filling station, the weighing station, and the filling hole sealing station. When secondary batteries are transferred between assembly stations, they are prone to shaking, which reduces the production yield, causes the secondary batteries to be reworked, and reduces production efficiency. Utility Model Content

[0005] A primary objective of this application is to provide a battery gripping device and a battery transfer fixture that facilitates improved production efficiency of individual battery cells.

[0006] To achieve the above-mentioned objectives, this application adopts the following technical solution:

[0007] According to one aspect of this application, a battery gripping device is provided, comprising: a gripping body including a drive mechanism and a gripper, the gripper being connected to the drive mechanism, the drive mechanism being used to drive the gripper to switch between gripping or releasing a battery cell; and a sealing assembly including a plug, the plug being connected to the drive mechanism and located within the area enclosed by the gripper, the plug being used to seal the electrolyte filling hole of the battery cell.

[0008] In this embodiment, the battery gripping device can grip or release battery cells using the grippers, thereby transferring the battery cells. Simultaneously, the battery gripping device includes plugs that can seal the electrolyte injection holes (i.e., the injection holes on the cover plate) of the battery cells, effectively preventing electrolyte overflow from the injection holes due to the shaking of the battery cells during transfer. This ensures the transfer yield of the battery cells and, consequently, the production efficiency of the battery cells.

[0009] According to one embodiment of this application, the sealing assembly further includes a connecting frame, the connecting frame being fixedly connected to the driving mechanism, and the plug being fixedly connected to the connecting frame.

[0010] According to one embodiment of this application, the sealing assembly further includes a first elastic member, which is fixedly connected to the connecting frame, and the plug is fixedly connected to the first elastic member.

[0011] In this embodiment, by setting the first elastic element, when the plug seals the injection hole, the sealing force of the plug on the injection hole can be guaranteed based on the elastic force of the first elastic element, thereby ensuring the sealing effect of the plug on the injection hole.

[0012] According to one embodiment of this application, the battery gripping device further includes a positioning component, which includes a pressure plate and a second elastic element; the second elastic element is fixedly connected to the connecting frame, the pressure plate is fixedly connected to the second elastic element and has a hollow opening, the pressure plate is used to abut against the end face of the battery cell where the liquid injection hole is located, and the hollow opening is used to expose the liquid injection hole.

[0013] In this embodiment, based on the positioning component, the battery cell can be pressed by the pressure plate before the plug seals the electrolyte injection hole of the battery cell, thereby positioning the battery cell and preventing the battery cell from shaking when the plug contacts the battery cell, thus further preventing the electrolyte from overflowing along the injection hole.

[0014] According to one embodiment of this application, the pressure plate has a plurality of positioning posts facing away from the second elastic member, and the positioning posts protrude from the plug in a direction away from the connecting frame.

[0015] According to one embodiment of this application, the distance between the pressure plate and the drive mechanism is greater than the distance between the end face of the plug and the drive mechanism.

[0016] According to one embodiment of this application, the plug has a tapered tip facing away from the drive mechanism.

[0017] In this embodiment, the tapered tip of the plug can achieve line contact with the edge of the injection hole, thereby improving the deformation effect of the tapered tip on the plug and ensuring the reliability of the plug sealing the injection hole.

[0018] According to one embodiment of this application, the gripper includes a pair of gripping hands, both of which are connected to the drive mechanism, and the plug is located between the pair of gripping hands.

[0019] In this embodiment, a pair of gripping hands form a claw to simplify the structure of the claw while ensuring the gripping of individual battery cells.

[0020] According to one embodiment of this application, the driving mechanism is a driving cylinder, the driving cylinder has a pair of movable arms, and a pair of grippers are respectively fixedly connected to the pair of movable arms.

[0021] According to one aspect of this application, a battery transfer fixture is provided, including a drive system and a battery gripping device as described in the above aspect; the drive system is connected to the drive mechanism, and the drive system is used to drive the battery gripping device to move.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0023] The above and other features and advantages of this application will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the axonal structure of a battery gripping device according to an exemplary embodiment.

[0025] Figure 2 This is a schematic diagram of the axial exploded structure of a battery gripping device gripping a single battery cell, according to an exemplary embodiment.

[0026] Figure 3 This is a schematic diagram of the axonal structure of another battery gripping device according to an exemplary embodiment.

[0027] Figure 4 This is a schematic diagram of the axonal structure of another battery gripping device according to an exemplary embodiment.

[0028] Figure 5 This is a schematic diagram of the axonal structure of another battery gripping device according to an exemplary embodiment.

[0029] The reference numerals in the attached figures are explained as follows:

[0030] 10. Battery gripping device; 20. Individual battery cell;

[0031] 11. Grasp the main body; 12. Blocking component; 13. Positioning component;

[0032] 111. Drive mechanism; 112. Claw; 113. Gripper; 114. Movable arm;

[0033] 121. End cap; 122. Connecting frame; 123. First elastic element; 124. First bending arm; 125. Second bending arm;

[0034] 131. Pressure plate; 132. Second elastic element; 133. Hollowed-out opening; 134. Positioning post;

[0035] 21. Injection hole. Detailed Implementation

[0036] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0037] This application provides a battery cell 20, such as a secondary battery, which can be a cylindrical battery, a prismatic battery, etc. The battery cell 20 includes: a housing, an electrode assembly, and an end cap assembly. The housing has an open receiving cavity, the electrode assembly is housed in the receiving cavity, and the end cap assembly seals the opening of the receiving cavity.

[0038] The housing can be a cylindrical structure with one end open, in which case the battery cell 20 includes an end cap assembly to seal one opening of the housing; of course, the housing can also be a cylindrical structure with both ends open, in which case the battery cell 20 includes two end cap assemblies, or includes one end cap assembly and a cover plate, so that the two openings of the housing can be sealed by the two end cap assemblies, or by one end cap assembly and a cover plate respectively.

[0039] The end cap assembly includes a cover plate and electrode terminals. The electrode terminals pass through the cover plate, with one end connected to the electrode assembly and the other end exposed as an output terminal of the battery cell 20. The end cap assembly also includes an explosion-proof valve. The cover plate has mounting holes, and the explosion-proof valve is installed within these holes. The explosion-proof valve is used to open when the pressure inside the containment cavity exceeds the valve opening pressure, releasing gas from the containment cavity to improve the safety of the battery cell 20. Additionally, the end cap assembly includes a protective film attached to the outer surface of the cover plate, covering the mounting holes on the cover plate. The cover plate also has an injection hole 21, which communicates with the containment cavity of the housing. After the basic assembly of the battery cell 20 (i.e., the assembly of the basic structure) is completed, electrolyte is injected into the containment cavity of the housing through the injection hole 21 to wet the electrode assembly.

[0040] The electrode assembly includes a first electrode, a second electrode, and a diaphragm stacked together. The first and second electrodes have opposite polarities, and the diaphragm is located between the first and second electrodes. The electrode assembly has a first tab and a second tab at its ends. The first tab and the second tab can be located at the same end of the electrode assembly or at different ends. Taking the first tab and the second tab at both ends of the electrode assembly as an example, one of the first tab and the second tab is connected to the electrode terminal included in the end cap assembly, and the other is connected to the bottom of the housing, so that the electrical energy output of the electrode assembly is realized through the electrode terminal of the end cap assembly and the bottom of the housing.

[0041] It should be noted that the battery cell 20 also includes metal adapters, which are used to connect the first tab of the electrode assembly to the electrode terminal on the end cap assembly and the second tab of the electrode assembly to the bottom of the housing, thereby ensuring the current flow capacity between the electrode assembly and the electrode terminal, and between the electrode assembly and the bottom of the housing.

[0042] In related technologies, after the basic assembly of the battery cell 20 is completed, the battery cell 20 will be filled with electrolyte at the electrolyte filling station. After the electrolyte filling is completed, it will be transferred to the next assembly station (such as the weighing station or the filling hole 21 sealing station). However, during the assembly process of the battery cell 20, it is easy to cause the battery cell 20 to shake, which will cause the electrolyte to overflow along the filling hole 21, causing contamination of the end cap assembly, and even eroding the protective film above the explosion-proof valve, resulting in the rework of the battery cell 20 and reducing the production efficiency of the battery cell 20.

[0043] Figure 1 A schematic diagram illustrating the structure of a battery gripping device 10 provided in an embodiment of this application is shown. Figure 2 An exploded view of a battery gripping device 10 gripping a single battery cell 20, as illustrated in an embodiment of this application, is provided. Figure 1 and Figure 2 As shown, the battery gripping device 10 includes a gripping body 11 and a sealing assembly 12. The gripping body 11 includes a drive mechanism 111 and a claw 112. The claw 112 is connected to the drive mechanism 111, and the drive mechanism 111 is used to drive the claw 112 to switch between gripping the battery cell 20 and releasing the battery cell 20. The sealing assembly 12 includes a plug 121, which is connected to the drive mechanism 111 and located in the area enclosed by the claw 112. The plug 121 is used to seal the liquid injection hole 21 of the battery cell 20.

[0044] In this embodiment, the battery gripper 10 can grip or release the battery cell 20 based on the claw 112, thereby transferring the battery cell 20. At the same time, the plug 121 included in the battery gripper 10 can seal the electrolyte injection hole 21 (i.e., the electrolyte injection hole 21 on the cover plate) of the battery cell 20, so as to effectively prevent the electrolyte from overflowing along the electrolyte injection hole 21 due to the shaking of the battery cell 20 during transfer, thereby ensuring the transfer yield of the battery cell 20 and thus ensuring the production efficiency of the battery cell 20.

[0045] Specifically, when the battery gripping device 10 grips the battery cell 20, the claw 112 is in a released state. When the battery gripping device 10 moves above the battery cell 20 (for example, moving along the axial direction of the battery cell 20), the plug 121 can seal the liquid injection hole 21 on the battery cell 20. Then, the drive mechanism 111 drives the claw 112 to grip the battery cell 20. At this time, even if the battery cell 20 shakes due to the contact between the claw 112 and the battery cell 20, the plug 121 will seal the liquid injection hole 21 on the battery cell 20. The filling hole 21 is sealed to prevent electrolyte from overflowing along the filling hole 21. When the battery gripping device 10 releases the battery cell 20, the claw 112 is in a gripping state and the plug 121 seals the filling hole 21 on the battery cell 20. The driving mechanism 111 can drive the claw 112 to release the battery cell 20. At this time, even if the battery cell 20 shakes due to the contact between the claw 112 and the battery cell 20, the electrolyte will not overflow along the filling hole 21 because the plug 121 seals the filling hole 21.

[0046] The drive mechanism 111 is mainly used to drive the gripper 112 to switch between gripping and opening. For example, the drive mechanism 111 can be a drive cylinder to realize the switching between gripping and opening of the gripper 112 based on the reciprocating motion of the drive cylinder. Of course, the drive mechanism 111 can also be other structures, such as the drive mechanism 111 including a drive motor and a drive component to realize the switching between gripping and opening of the gripper 112 based on the drive of the drive component by the drive electrode.

[0047] In some implementations, such as Figure 1As shown, the plug 121 has a flat end face facing away from the drive mechanism 111.

[0048] In this way, the reliability of the plug 121 in sealing the injection hole 21 can be ensured by the contact between the flat end face on the plug 121 and the end face on the battery cell 20 with the injection hole 21 (i.e., the outer surface of the cover plate mentioned above). In addition, based on the large flat end face on the plug 121, the injection holes 21 of various diameters can be sealed, which improves the adaptability of the battery gripping device 10.

[0049] The plug 121 has a flat end face, meaning the end face of the plug 121 facing away from the drive mechanism 111 is flat. The plug 121 is made of rubber or similar material to ensure that it can undergo a certain degree of elastic deformation under external force. When the end face of the plug 121 comes into contact with the end face of the battery cell 20, the interaction force during contact causes the plug 121 to elastically deform, thus ensuring the sealing effect of the plug 121 on the injection hole 21. Alternatively, a sealing ring can be provided on the end face of the plug 121 facing away from the drive mechanism 111. The diameter of the sealing ring is larger than the diameter of the injection hole 21, so that when the plug 121 seals the injection hole 21, the sealing ring can surround the periphery of the injection hole 21, and the elastic deformation of the sealing ring can ensure the reliability of the plug 121 in sealing the injection hole 21.

[0050] In other implementations, such as Figure 3 As shown, the plug 121 has a tapered tip facing away from the drive mechanism 111.

[0051] In this way, the plug 121 can have a tapered end face facing away from the drive mechanism 111. At this time, the tapered tip of the plug 121 can be inserted into the injection hole 21. Based on the line contact between the tapered end face and the edge of the injection hole 21, the deformation effect of the tapered tip on the plug 121 is improved, thereby ensuring the reliability of the plug 121 in sealing the injection hole 21.

[0052] The material of the plug 121 can be the same as described in the above embodiments to ensure the reliability of the elastic deformation of the plug 121.

[0053] In some implementations, such as Figure 1 or Figure 3 As shown, the sealing assembly 12 also includes a connecting frame 122, which is fixedly connected to the drive mechanism 111, and the plug 121 is fixedly connected to the connecting frame 122.

[0054] Thus, the connection between the plug 121 and the drive mechanism 111 is facilitated by the connecting bracket 122; in addition, the connection between the plug 121 and the drive mechanism 111 is facilitated by the connecting bracket 122, which in turn facilitates the reduction of the distance between the plug 121 and the injection hole 21, thereby ensuring the reliability of the seal between the plug 121 and the injection hole 21.

[0055] In some embodiments, the connecting frame 122 is a 90-degree bent frame.

[0056] Specifically, such as Figure 1 or Figure 3 As shown, the connecting frame 122 includes a first bending arm 124 and a second bending arm 125, and the first bending arm 124 and the second bending arm 125 are connected at a 90-degree angle. The first bending arm 124 is fixedly connected to the drive mechanism 111 and extends out of the end face of the drive mechanism 111. The second bending arm 125 is parallel to the same end face of the drive mechanism 111.

[0057] At least a portion of the second bent arm 125 is located within the area enclosed by the claws 112, thereby ensuring that the plug 121 is located within the area enclosed by the claws 112 after being fixedly connected to the second bent arm 125. In addition, the first bent arm 124 and the second bent arm 125 are an integral structure to simplify the structure of the connecting frame 122 and the installation of the battery gripping device 10.

[0058] In some implementations, such as Figure 1 or Figure 3 As shown, the sealing assembly 12 also includes a first elastic element 123, which is fixedly connected to the connecting frame 122, and the plug 121 is fixedly connected to the first elastic element 123.

[0059] Thus, by setting the first elastic element 123, when the plug 121 blocks the injection hole 21, the elastic force of the first elastic element 123 can be used to ensure the sealing force of the plug 121 on the injection hole 21, thereby ensuring the sealing effect of the plug 121 on the injection hole 21.

[0060] The first elastic element 123 can be a compression spring, a compression sheet, or anything else that can generate an elastic force on the plug 121 that is far away from the drive mechanism 111 based on its own compression.

[0061] In some implementations, such as Figure 4 As shown, the battery gripping device 10 also includes a positioning component 13, which includes a pressure plate 131 and a second elastic member 132. The second elastic member 132 is fixedly connected to the connecting frame 122, and the pressure plate 131 is fixedly connected to the second elastic member 132 and has a hollow opening 133. The pressure plate 131 is used to abut against the end face where the liquid injection hole 21 is located on the battery cell 20, and the hollow opening 133 is used to expose the liquid injection hole 21.

[0062] Thus, based on the positioning component 13, before the plug 121 seals the electrolyte injection hole 21 of the battery cell 20, the pressure plate 131 can be used to press the battery cell 20 to position it, thereby preventing the battery cell 20 from shaking when the plug 121 contacts it, and further preventing the electrolyte from overflowing along the electrolyte injection hole 21.

[0063] The structure of the second elastic element 132 can refer to the structure of the first elastic element 123 described above. For example, the second elastic element 132 is a compression spring. Furthermore, the positioning assembly 13 may include one or more second elastic elements 132. When the positioning assembly 13 includes one second elastic element 132, the second elastic element 132 needs to ensure a large outer contour area to guarantee the stability of pressing the pressure plate 131. When the positioning assembly 13 includes multiple second elastic elements 132, multi-point pressing of the pressure plate 131 can be achieved based on multiple second elastic elements 132, ensuring the stability of pressing the pressure plate 131.

[0064] Among them, the pressure plate 131 can be a plate-like structure (e.g. Figure 4 As shown in the diagram (disc structure), the pressure plate 131 can directly abut against the end face of the battery cell 20 to achieve positioning of the battery cell 20; of course, the pressure plate 131 can also be as shown in the diagram. Figure 5 The diagram shows multiple positioning posts 134 facing away from the second elastic member 132. At this time, the multiple positioning posts 134 can abut against the end face of the battery cell 20 to achieve positioning of the battery cell 20.

[0065] In addition, when the pressure plate 131 is a plate-shaped structure, in the direction away from the connecting frame 122, the distance between the pressure plate 131 and the drive mechanism 111 is greater than the distance between the end face of the plug 121 and the drive mechanism 111, thereby ensuring that when the battery gripping device 10 grips the battery, the pressure plate 131 preferentially contacts the end face of the battery cell 20 to achieve pressing and limiting of the battery cell 20; when the pressure plate 131 has multiple positioning posts 134, in the direction away from the connecting frame 122, the positioning posts 134 protrude from the plug 121, thereby ensuring that when the battery gripping device 10 grips the battery, the positioning posts 134 preferentially contact the end face of the battery cell 20 to achieve pressing and limiting of the battery cell 20.

[0066] It should be noted that after the pressure plate 131 or the positioning post 134 first contacts the end face of the battery cell 20, the battery gripping device 10 continues to move closer to the battery cell 20, which will compress the second elastic member 132, so that the pressure plate 131 or the positioning post 134 further presses the battery cell 20 until the end of the plug 121 seals the liquid injection hole 21 of the battery cell 20; and in order to ensure the sealing effect of the plug 121 on the liquid injection hole 21, the battery gripping device 10 will continue to move closer to the battery cell 20, so that the first elastic member 123 is in a compressed state, thereby ensuring the reliability of the plug 121 sealing the liquid injection hole 21. In addition, the aforementioned situations where the distance between the pressure plate 131 and the drive mechanism 111 is greater than the distance between the end face of the plug 121 and the drive mechanism 111, and where the positioning post 134 protrudes from the plug 121, all refer to the state of the battery gripping device 10 when it is not subjected to external force, especially the state of the first elastic member 123 and the second elastic member 132 when they are not subjected to external force.

[0067] In some implementations, such as Figure 4 or Figure 5 As shown, the gripper 112 includes a pair of gripping hands 113, both of which are connected to the drive mechanism 111, and the plug 121 is located between the pair of gripping hands 113. In this way, the gripper 112 is formed by the pair of gripping hands 113, so as to simplify the structure of the gripper 112 while ensuring the gripping of the battery cell 20.

[0068] The gripper 113 includes a base end and an end end. The base end is fixedly connected to the drive mechanism 111, and the end end extends beyond one end face of the drive mechanism 111 (the same end face that the connecting frame 122 extends from in the drive mechanism 111) to ensure that the battery cell 20 can be accommodated between the pair of grippers 113. Then, driven by the drive mechanism 111, the battery cell 20 is gripped by the mutual approach of the pair of grippers 113. The specific structure of the gripper 113 can refer to relevant technologies, as long as it can stably grip the battery cell 20.

[0069] In some embodiments, the drive mechanism 111 is a drive cylinder, such as Figure 4 or Figure 5 As shown, the drive cylinder has a pair of movable arms 114, and a pair of grippers 113 are fixedly connected to the pair of movable arms 114 respectively.

[0070] Thus, the use of a drive cylinder simplifies the fixing of a pair of grippers 113 to the drive mechanism 111, thereby simplifying the structure of the battery gripping device 10.

[0071] This application also provides a battery transfer fixture, including a drive system and the battery gripping device 10 described in the above embodiments; the drive system is connected to the drive mechanism 111, and the drive system is used to drive the battery gripping device 10 to move.

[0072] Thus, based on the battery gripping device 10 described above, the electrolyte overflow of the battery cell 20 during transfer is avoided, thereby ensuring the high yield of the battery transfer fixture in handling the battery cell 20.

[0073] The drive system includes a drive motor and a moving component. The drive motor is connected to the moving component, and the moving component is connected to the drive mechanism 111. Driven by the drive motor, the moving component moves the battery gripping device 10, thereby transferring the battery cell 20. For example, the moving component includes a vertical moving component and a horizontal moving component.

[0074] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0075] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0076] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the implementation of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] The above are merely preferred embodiments of the implementation methods of this application and are not intended to limit the implementation methods of this application. For those skilled in the art, various modifications and variations can be made to the implementation methods of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the implementation methods of this application should be included within the protection scope of the implementation methods of this application.

Claims

1. A battery gripping device (10), characterized in that, include: The gripping body (11) includes a drive mechanism (111) and a gripper (112). The gripper (112) is connected to the drive mechanism (111). The drive mechanism (111) is used to drive the gripper (112) to switch between gripping the battery cell (20) or releasing the battery cell (20). The sealing assembly (12) includes a plug (121) connected to the drive mechanism (111) and located within the area enclosed by the claws (112). The plug (121) is used to seal the liquid injection hole (21) of the battery cell (20).

2. The battery gripping device (10) as described in claim 1, characterized in that, The sealing assembly (12) further includes a connecting frame (122), which is fixedly connected to the driving mechanism (111), and the plug (121) is fixedly connected to the connecting frame (122).

3. The battery gripping device (10) as described in claim 2, characterized in that, The sealing assembly (12) further includes a first elastic element (123), which is fixedly connected to the connecting frame (122), and the plug (121) is fixedly connected to the first elastic element (123).

4. The battery gripping device (10) as described in claim 2, characterized in that, The battery gripping device (10) further includes a positioning component (13), which includes a pressure plate (131) and a second elastic element (132); The second elastic element (132) is fixedly connected to the connecting frame (122), and the pressure plate (131) is fixedly connected to the second elastic element (132) and has a hollow opening (133). The pressure plate (131) is used to abut against the end face where the liquid injection hole (21) is located on the battery cell (20), and the hollow opening (133) is used to expose the liquid injection hole (21).

5. The battery gripping device (10) as described in claim 4, characterized in that, The pressure plate (131) has a plurality of positioning posts (134) facing away from the second elastic member (132), and the positioning posts (134) protrude from the plug (121) in a direction away from the connecting frame (122).

6. The battery gripping device (10) as described in claim 4, characterized in that, The distance between the pressure plate (131) and the drive mechanism (111) is greater than the distance between the end face of the plug (121) and the drive mechanism (111).

7. The battery gripping device (10) as described in any one of claims 1-6, characterized in that, The plug (121) has a tapered tip facing away from the drive mechanism (111).

8. The battery gripping device (10) as described in any one of claims 1-6, characterized in that, The gripper (112) includes a pair of grippers (113), both of which are connected to the drive mechanism (111), and the plug (121) is located between the pair of grippers (113).

9. The battery gripping device (10) as described in claim 8, characterized in that, The driving mechanism (111) is a driving cylinder, which has a pair of movable arms (114), and a pair of grippers (113) are fixedly connected to the pair of movable arms (114).

10. A battery transfer fixture, characterized in that, Includes a drive system and a battery gripping device (10) as described in any one of claims 1-9; The drive system is connected to the drive mechanism (111), and the drive system is used to move the battery gripping device (10).

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