Battery Gripper

Abstract

A battery gripper according to one embodiment of the present invention includes a side support base that supports a side surface of a battery cell, at least one first magnet adapter provided in at least a portion of the side support base, and a lower support base that supports a first magnet built into the first magnet adapter and configured to face the battery cell, as well as the lower surface of the battery cell.

Description

[Technical Field]

[0001] The present invention relates to a battery gripper, and more particularly to a fixing device for cylindrical battery cells.

[0002] This application claims priority based on Korean Patent Application No. 10-2022-0167798, filed on December 5, 2022, and the entire contents disclosed in the specification and drawings of that application are incorporated herein by reference. [Background technology]

[0003] Secondary batteries, which are easily applicable to various products and have electrical properties such as high energy density, are widely used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) that are driven by electrical sources. These secondary batteries not only have the temporary advantage of dramatically reducing the use of fossil fuels, but also have the advantage of not producing any by-products associated with energy use, and are therefore attracting attention as a new energy source that is environmentally friendly and improves energy efficiency.

[0004] Currently widely used types of secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. The operating voltage of such a unit secondary battery cell, i.e., a unit battery cell, is approximately 2.5V to 4.5V. Therefore, when a higher output voltage is required, a battery pack may be configured by connecting multiple battery cells in series. Furthermore, a battery pack may be configured by connecting multiple battery cells in parallel depending on the required charge / discharge capacity of the battery pack. Therefore, the number of battery cells included in the battery pack may be variously set depending on the required output voltage and / or charge / discharge capacity.

[0005] Meanwhile, after inserting the jelly roll-type electrode assembly with the welded current collector plate into the battery can, it is necessary to align the cell position in order to weld the current collector plate to the beading portion of the battery can. Considering the driving characteristics of the equipment, welding and movement are performed while rotating in a rotary manner, so existing conventional grippers can cause battery cells to rotate and slip. Therefore, efforts were made to develop a gripper that does not cause cell rotation or slippage in order to meet welding quality requirements. Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a gripper in which the position and angle of the battery do not change during movement after the gripper is accurately positioned at a welding position in a rotary type driving device.

[0007] That is, one object of the present invention is to prevent the battery from slipping.

[0008] Another object of the present invention is to improve the ease of adjusting the position of the battery and the yield of welding position inspection.

[0009] In another aspect, it is still another object of the present invention to improve weld quality.

[0010] However, the technical problems that the present invention aims to solve are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention given below. [Means for solving the problem]

[0011] An object of the present invention is to provide a gripper in which the position and angle of the battery are not changed during the movement after the gripper is accurately positioned at a welding position in a rotary type driving device.

[0012] That is, an object of the present invention is to prevent the battery from slipping.

[0013] Another object of the present invention is to improve the ease of adjusting the position of the battery and the yield of welding position inspection.

[0014] In another aspect, it is still another object of the present invention to improve weld quality.

[0015] However, the technical problems that the present invention aims to solve are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention given below. [Effects of the Invention]

[0016] According to the present invention, by using magnetic force to grip the battery when it is moved from the rotary section to the welding head, it is possible to prevent the battery from slipping.

[0017] In another aspect, the present invention can be expected to facilitate battery position adjustment and improve the yield of welding position inspection.

[0018] However, the effects obtained through the present invention are not limited to the above-mentioned effects, and other technical effects not mentioned will be clearly understood by those skilled in the art from the description of the invention described below.

[0019] The drawings attached to this specification are intended to illustrate preferred embodiments of the present invention and serve to further understand the technical concepts of the present invention as well as the contents of the invention, and therefore the present invention should not be interpreted as being limited to the matters depicted in the drawings. Meanwhile, the shape, size, scale, or ratio of elements in the drawings attached to this specification may be exaggerated to emphasize a clearer description. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a diagram illustrating a battery gripper according to an embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a diagram for explaining a state in which a battery is attached to the battery gripper in FIG. 1. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA' in FIG. 2. [Figure 4] 10A and 10B are views illustrating a battery gripper according to another embodiment of the present invention. [Figure 5] 10A and 10B are views illustrating a battery gripper according to still another embodiment of the present invention. [Figure 6] 10A and 10B are views illustrating a battery gripper according to still another embodiment of the present invention. [Figure 7] 10A and 10B are views illustrating a process in which a battery enters a battery gripper according to an embodiment of the present invention. [Figure 8] 10A to 10C are views illustrating a process of adjusting the position of a battery in a battery gripper according to an embodiment of the present invention after the battery is inserted. [Figure 9] 10A and 10B are views illustrating a process in which a first side support base of a battery gripper according to an embodiment of the present invention advances toward the battery after the battery position has been adjusted. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and words used in the specification and claims should not be construed as being limited to their ordinary or dictionary meanings, but should be construed as having meanings and concepts corresponding to the technical ideas of the present invention, in accordance with the principle that the inventor can appropriately define the concepts of terms himself in order to best describe the invention.

[0022] Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are merely preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and that there may be various equivalents and modifications that can be substituted therefor at the time of this application.

[0023] Conventional battery grippers for battery-type rotary devices have a standard gripper configuration without a separate anti-slip function. For cylindrical batteries, after inserting a jelly-roll-type electrode assembly with a welded current collector plate (CP) into the battery can, the cell must be aligned for welding between the current collector plate (CP) and the beading portion (BD) of the battery can. Because the equipment's driving characteristics require welding and movement while rotating in a rotary fashion, conventional grippers can cause battery cell rotation and slippage. In other words, conventional battery holding devices lack a mechanism or shape to prevent battery slippage within the gripper, resulting in slippage. Therefore, efforts were needed to develop a gripper that would prevent cell rotation and slippage in order to meet welding quality requirements.

[0024] For this reason, the inventors have conducted extensive research into a configuration for preventing rotation and slippage when welding the beading portion BD of a cylindrical battery, and as a result, have come up with the battery gripper 1 of the present invention, which will be described in detail below with reference to Figures 1 to 9.

[0025] FIG. 1 is a diagram illustrating a battery gripper 1 according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a state in which a battery is attached to the battery gripper 1 of FIG.

[0026] 1 and 2, a battery gripper 1 according to an embodiment of the present invention includes a side support base 10 and a lower support base 20.

[0027] Here, the side support 10 may support the side of the battery cell B. For example, if the battery cell B is a cylindrical battery cell B, the side support 10 may be configured to have a generally arcuate shape so as to support the side of the cylindrical battery cell B. In this case, the radius of the arc constituting the side support 10 may be greater than or equal to the radius of the cylindrical battery cell B. That is, in this structure, the side support 10 may be configured to enclose the side of the cylindrical battery cell B. The side support 10 may support at least a portion of the side of the battery cell B. For example, as shown in FIGS. 1 and 2 , a plurality of side support 10 may be provided in the form of an arcuate rib. Alternatively, in another embodiment, a single side support 10 may be provided in the form of an arcuate rib. Alternatively, in yet another embodiment, the side support 10 may have a curved shape that entirely encloses the side of the cylindrical battery cell B.

[0028] In one embodiment of the present invention, at least one first magnet adapter 11 may be provided in at least a portion of the side support 10. Here, the first magnet adapter 11 may be configured to face the battery cell B. Furthermore, the first magnet adapter 11 may incorporate a first magnet 12. Here, the first magnet 12 incorporated in the first magnet adapter 11 may be configured to face the battery cell B. For example, referring to FIG. 2 , the first magnet 12 may be configured to face the battery cell B. More specifically, the first magnet 12 may be incorporated in a space within the first magnet adapter 11, or may be exposed to the outside of the first magnet adapter 11 through a predetermined hole provided in the first magnet adapter 11.

[0029] According to this configuration of the present invention, the battery can of the battery cell B is made of a metal material, so a magnetic force can be exerted between the first magnet 12 and the battery can. This allows the battery can to be accurately fixed at a specific position within the battery gripper 1. That is, the first magnet 12 grips the battery cell B using its magnetic force, which prevents the battery cell B from slipping. Ultimately, this improves the ease of position adjustment of the battery cell B, the yield of welding position inspection, and the welding quality.

[0030] In another embodiment of the present invention, the first magnet adapter 11 can be configured to be detachable from the side support base 10.

[0031] For example, referring to FIGS. 1 and 2, the side support 10 has a recessed space for accommodating the first magnet adapter 11, and the first magnet adapter 11 can be accommodated in the recessed space. The magnet adapter can be fixed onto the side support 10. As a fixing method, for example, screwing can be used, but the fixing method is not limited thereto. Meanwhile, the first magnet adapter 11 can be detached from the side support 10. That is, the first magnet adapter 11 can be configured to be detachable from the side support 10.

[0032] According to this configuration of the present invention, the strength of the magnetic force acting on the battery can can be easily adjusted depending on the situation. For example, if the type of battery cell B changes or the material constituting the battery can of the battery cell B changes, it may be necessary to adjust the strength of the magnetic force for holding the battery cell B. In this case, by removing the installed first magnetic adapter 11 and installing another first magnetic adapter 11, the strength of the magnetic force can be easily adjusted without replacing the entire gripper or the entire side support base 10. In other words, as long as the outer shape of the first magnetic adapter 11 and the size of the recessed space of the side support base 10 are constant, the battery gripper 1 can be used by changing various adapters having various types or sizes of first magnets 12 built into the first magnetic adapter 11.

[0033] In still another embodiment of the present invention, a plurality of the first magnet adapters 11 may be provided in at least a portion of the side support base 10 .

[0034] 1 and 2, for example, a plurality of first magnet adapters 11 may be provided at predetermined intervals along the outer circumferential surface of the battery cell B. In the embodiment of FIGS. 1 and 2, three first magnet adapters 11 are provided along the surface facing the battery cell B, but the present invention is not limited thereto. For example, a single first magnet adapter 11 may be provided, or a greater number of first magnet adapters 11 than in the embodiment of FIGS. 1 and 2 may be provided.

[0035] Meanwhile, a structure in which a plurality of first magnet adapters 11 are provided further improves the anti-slip effect of the battery cells B. For example, if a plurality of first magnet adapters 11 are provided, the attractive force acting between the first magnet adapters 11 and the battery cells B becomes stronger, thereby further improving the anti-slip effect of the battery cells B in the tangential direction.

[0036] FIG. 3 is a cross-sectional view taken along line AA' in FIG.

[0037] 3, the first magnet adapter 11 of the battery gripper 1 according to an embodiment of the present invention may be spaced apart from the battery cell B by a predetermined distance. That is, the first magnet adapter 11 may not be in direct contact with the battery cell B. Accordingly, the first magnet 12 built into the first magnet adapter 11 may also be spaced apart from the battery cell B by a predetermined distance. That is, the first magnet 12 may not be in direct contact with the battery cell B.

[0038] This structure prevents direct contact between the first magnet adapter 11 and / or the first magnet 12 and the battery cell B, thereby preventing scratches on the battery can of the battery cell B. In other words, the first magnet 12 does not necessarily need to be in contact with the battery cell B, as its magnetic force works even without direct contact with the battery cell B. Rather, to prevent scratches, it is preferable that the first magnet 12 be spaced a predetermined distance from the battery cell B. However, if the distance between the first magnet 12 and the battery cell B is too great, the magnetic force will be weak, so an excessively large distance is not preferable.

[0039] In another embodiment of the present invention, the side support 10 and the lower support 20 may include a resin material.

[0040] For example, the side support 10 and the lower support 20 may include a plastic resin material. Preferably, the side support 10 and the lower support 20 may include a polyether ether ketone (PEEK) material. Because the side support 10 and the lower support 20 are components that directly contact the battery cell B, if the side support 10 and the lower support 20 include a material with high hardness, there is a high possibility that the battery cell B will be scratched. Therefore, it is preferable that the side support 10 and the lower support 20 include a resin material that has a predetermined hardness but is not prone to scratches. For example, polyether ether ketone (PEEK) material can be used for the side support 10 and the lower support 20 of the present invention because it has a certain level of hardness and is also highly brittle.

[0041] For the same reason, the first magnet adapter 11 may include a resin material. For example, the first magnet adapter 11 may include a plastic resin material. Preferably, the first magnet adapter 11 may include a polyether ether ketone (PEEK) material.

[0042] Similarly, the second magnet adapter 21, which will be described later, may also include a resin material. For example, the second magnet adapter 21 may include a plastic resin material. Preferably, the second magnet adapter 21 may include a polyether ether ketone (PEEK) material.

[0043] In yet another embodiment of the present invention, the first magnet 12 may be an electromagnet. Similarly, the second magnet 22, which will be described later, may be an electromagnet. In this case, additional components required for the operation of the electromagnet may be included as components of the present invention.

[0044] In this way, when the first magnet 12 and / or the second magnet 22 are composed of electromagnets, the strength of the magnetic force can be adjusted without replacing the first magnet adapter 11 and / or the second magnet adapter 21.

[0045] FIG. 4 is a diagram illustrating a battery gripper 1 according to another embodiment of the present invention.

[0046] Referring to FIG. 4, the size of the first magnet 12 of the battery gripper 1 according to another embodiment of the present invention may be different. Alternatively, as shown in the figure, the diameter of the hole provided in the first magnet adapter 11 may be different. For example, the size of the first magnet 12 may be larger or smaller. Alternatively, the diameter of the hole provided in the first magnet adapter 11 may be larger or smaller.

[0047] With this structure, various types of magnet adapters with various magnetic forces can be configured by varying the size of the first magnet 12 built into the first magnet adapter 11. Alternatively, various types of magnet adapters with various magnetic forces can be configured by varying the diameter of the hole provided in the first magnet adapter 11. This makes it possible to apply a wide variety of magnetic forces depending on the situation.

[0048] FIG. 5 is a diagram illustrating a battery gripper 1 according to still another embodiment of the present invention.

[0049] Referring to FIG. 5, the distance S between the surface of the first magnetic adapter 11 facing the battery cell B and the battery cell B may be different.

[0050] For example, as shown in FIG. 5, in the first magnetic adapter 11, the distance S between the surface facing the battery cell B and the battery cell B may be larger than that in FIG. 1. In this case, the magnitude of the magnetic force acting on the battery cell B may be smaller. Alternatively, in the first magnetic adapter 11, the distance S between the surface facing the battery cell B and the battery cell B may be smaller than that in FIG. 1. In this case, the magnitude of the magnetic force acting on the battery cell B may be larger.

[0051] According to this structure, the gap S between the first magnet adapter 11 and the battery cell B can be varied to form various types of magnet adapters with a wide variety of magnetic forces.

[0052] FIG. 6 is a diagram illustrating a battery gripper 1 according to still another embodiment of the present invention.

[0053] Referring to FIG. 6, a first magnet adapter 11 according to yet another embodiment of the present invention may be configured to have a curved shape that conforms to the curved surface of the side support 10.

[0054] 6, the first magnet adapter 11 may be configured to have a generally arc-shaped configuration along the outer circumferential surface of the cylindrical battery cell B. In this case, the first magnet 12 built into the first magnet adapter 11 may also be provided in an arc-shaped configuration. Meanwhile, the holes provided in the first magnet adapter 11 may also be provided in an arc-shaped configuration, and in some cases, may be provided in the shape of multiple circles.

[0055] With this structure, a strong magnetic force can be ensured even with a single magnetic adapter.

[0056] 1 to 3, the battery gripper 1 according to an embodiment of the present invention may further include a second magnet adapter 21 and a second magnet 22. More specifically, the battery gripper 1 may include a second magnet adapter 21 provided in at least a portion of the lower support base 20, and a second magnet 22 built into the second magnet adapter 21 and configured to face the battery cell B.

[0057] With this structure, the battery cell B is subjected to magnetic force from the first magnet 12 in the lateral direction and magnetic force from the second magnet 22 in the lower part, which further strengthens the fixing force of the battery cell B. In other words, the anti-slip effect of the battery cell B is improved.

[0058] In one embodiment of the present invention, the second magnet adapter 21 can be configured to be detachable from the lower support base 20.

[0059] For example, referring to FIGS. 1 to 3 , the second magnetic adapter 21 may be positioned below the battery cell B. At this time, the second magnetic adapter 21 may move in a direction aligned with the central axis C of the battery cell B. For example, the second magnetic adapter 21 may advance toward the battery cell B in a direction aligned with the central axis C of the battery cell B. Furthermore, the second magnetic adapter 21 may retract in a direction aligned with the central axis C of the battery cell B and away from the battery cell B. Alternatively, the second magnetic adapter 21 may advance and / or retract laterally through a space between the lower support stands 20.

[0060] In this way, since the second magnet adapter 21 is configured to be detachable from the lower support stand 20, it is possible to easily adjust the position and angle of the battery cell B. In addition, it is possible for the battery cell B to enter the next rotary.

[0061] In another embodiment of the present invention, the second magnetic adapter 21 may have a generally disk shape.

[0062] 1 and 3, the second magnet adapter 21 may have a generally disk-like shape. Alternatively, the second magnet adapter 21 may have a cylindrical shape with a predetermined height. Here, the central axis C of the second magnet adapter 21 may coincide with the central axis C of the battery cell B.

[0063] With this structure, when the second magnet adapter 21 rotates, the battery cell B can rotate by the same angle as the rotation angle of the second magnet adapter 21. For example, when the battery cell B enters the battery gripper 1, the welding position between the beading portion BD and the current collector plate CP may not be positioned correctly. In this case, by rotating the second magnet 22 and thereby rotating the battery cell B, the welding position between the beading portion BD and the current collector plate CP can be set to the correct position.

[0064] Preferably, the second magnet 22 may be provided along the circumferential direction of the second magnet adapter 21 .

[0065] 1 and 3, the second magnet 22 may be built into the second magnet adapter 21. In this case, if the second magnet adapter 21 has a generally disk-like shape, the second magnet 22 may be configured as a generally ring-shaped magnet built into the disk. Alternatively, the second magnet 22 may be configured to have a generally cylindrical shape with a central axis C aligned with the central axis C of the second magnet adapter 21.

[0066] According to this structure, when the second magnet adapter 21 rotates, the battery cell B can rotate by the same angle as the rotation angle of the second magnet adapter 21.

[0067] In yet another embodiment of the present invention, the second magnet adapter 21 may be configured to be rotatable around the central axis C of the battery cell B.

[0068] For example, the battery gripper 1 according to an embodiment of the present invention may include a motor connected to the second magnet adapter 21. That is, when the motor connected to the second magnet adapter 21 rotates, the second magnet adapter 21 can rotate accordingly. As a result, the battery cell B can be rotated by the magnetic force generated by the second magnet 22 built into the second magnet adapter 21.

[0069] With this structure, the welding position between the beading portion BD and the current collector plate CP can be accurately set by rotating the second magnet 22 and thereby rotating the battery cell B. This will be described in detail below with reference to Figs.

[0070] FIG. 7 is a view illustrating a process in which a battery enters the battery gripper 1 according to an embodiment of the present invention.

[0071] 1 and 7, a side support 10 according to an embodiment of the present invention may include a first side support 10A and a second side support 10B. More specifically, the side support 10 may include a first side support 10A including the first magnetic adapter 11 and a second side support 10B not including the first magnetic adapter 11. The first side support 10A may be a support configured so that the first magnetic adapter 11 cannot be attached or detached.

[0072] When the battery cell B enters the battery gripper 1, as shown in Fig. 7, a second side support 10B may be provided on the battery gripper 1. When the battery cell B enters the battery gripper 1, the first side support 10A may be separated from the second side support 10B. This allows the battery cell B to be free from the influence of the first magnet 12 when it enters the battery gripper 1. That is, the battery cell B can enter so as to abut against the second side support 10B without being influenced by the first magnet 12 gripper.

[0073] FIG. 8 is a diagram illustrating a process of adjusting the position of a battery in the battery gripper 1 according to an embodiment of the present invention after the battery is inserted.

[0074] Referring to FIG. 8 , the inserted battery cell B may be positioned on the same axis as the second magnet adapter 21. At this time, the welding position between the beading portion BD of the battery cell B and the current collecting plate CP may be deviated from the correct position. In this case, the battery gripper 1 can recognize the angle of deviation. The battery gripper 1 can rotate the second magnet adapter 21 by the angle of deviation. That is, the second magnet adapter 21 can rotate by the angle of deviation based on the central axis C. As a result, the second magnet 22 built into the second magnet adapter 21 can also rotate by a predetermined angle based on the central axis C. As a result, the magnetic force of the second magnet 22 can also rotate the battery cell B by the predetermined angle based on the central axis C. That is, the battery cell B can rotate by the angle of deviation. Finally, the battery cell B can rotate so that the welding position between the beading portion BD and the current collecting plate CP is set to the correct position.

[0075] FIG. 9 is a view illustrating a process in which the first side support stand 10A of the battery gripper 1 according to an embodiment of the present invention moves toward the battery after the battery position has been adjusted.

[0076] Referring to FIG. 9, the first side support 10A may be configured to be able to advance toward the battery cell B and to be able to retreat from the battery cell B.

[0077] Specifically, the first side support 10A can move toward the battery cell B only after the welding position between the beading portion BD of the battery cell B and the current collector plate CP has been accurately set. The first side support 10A can fix the battery cell B so that it does not rotate further in the circumferential direction. That is, the second magnet adapter 21 rotates to accurately set the welding position between the beading portion BD of the battery cell B and the current collector plate CP, and then the first magnet adapter 11 can fix the set accurate position. This makes it possible to grip the battery cell B using magnetic force and prevent the battery cell B from slipping. Ultimately, this can be expected to facilitate easier position adjustment of the battery cell B and improve the yield of welding position inspection, thereby improving welding quality.

[0078] Meanwhile, the second magnet adapter 21 may be configured to be able to advance toward the battery cell B and to be able to retreat from the battery cell B.

[0079] That is, when the welding position between the beading portion BD and the current collecting plate CP is set and fixed at an accurate position, the second magnet adapter 21 can be retracted in a direction away from the battery cell B. This allows the battery cell B to move to the next rotary.

[0080] Although the present invention has been described above using limited embodiments and drawings, the present invention is not limited to these, and it goes without saying that various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention pertains within the technical spirit of the present invention and the scope of equivalents of the claims. [Explanation of symbols]

[0081] 1 Battery Gripper 10 Side support stand 10A First Side Support 10B Second side support base 11 First magnetic adapter 12 First Magnet 20 Lower support platform 21 Second magnetic adapter 22 Second Magnet B Battery cell BD beading part CP current collector plate C center axis

Claims

1. a side support base that supports a side surface of the battery cell; At least one first magnet adapter provided in at least a portion of the side support base; a first magnet built into the first magnet adapter and configured to face the battery cell; a lower support supporting a lower surface of the battery cell; Includes a battery gripper.

2. The battery gripper of claim 1 , wherein the first magnet adapter is configured to be detachable from the side support base.

3. The battery gripper according to claim 1 , wherein a plurality of the first magnet adapters are provided along the outer circumferential surface of the battery cell, the first magnet adapters being spaced apart by a predetermined interval.

4. a second magnet adapter provided in at least a portion of the lower support base; a second magnet built into the second magnet adapter and configured to face the battery cell; 4. The battery gripper of claim 1, further comprising:

5. The battery gripper according to claim 4 , wherein the second magnet adapter is configured to be detachable from the lower support base.

6. The battery gripper of claim 4 , wherein the second magnetic adapter has a disk shape.

7. The battery gripper according to claim 4 , wherein the second magnet is provided along a circumferential direction of the second magnet adapter.

8. The battery gripper according to claim 4 , wherein the second magnet adapter is configured to be rotatable about a central axis of the battery cell.

9. The battery gripper of claim 4 , including a motor connected with the second magnet adapter.

10. The side support base is a first side support base including the first magnet adapter; a second side support base that does not include the first magnet adapter; 10. The battery gripper of claim 1, comprising:

11. The first side support base includes: advanceable toward the battery cell; and The battery gripper of claim 10 configured to be retractable from the battery cell.

12. The second magnetic adapter includes: advanceable toward the battery cell; and The battery gripper of claim 4 configured to be retractable from the battery cell.

13. The battery gripper of claim 1 , wherein the side support base and the lower support base are made of a resin material.

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