Battery holder

Abstract

A battery holder according to one embodiment of the present invention comprises: a side support for supporting a side surface of a battery cell; at least one first magnet adapter disposed on at least a partial region of the side support; a first magnet mounted in the first magnet adapter and configured to face the battery cell; and a lower support member for supporting the lower surface of the battery cell.

Description

Technical Field

[0001] The present disclosure relates to a battery holder, and more particularly to a fixing device for a cylindrical battery cell.

[0002] This application claims priority to Korean Patent Application No. 10-2022-0167798 filed in Korea on December 5, 2022, the disclosure of which is incorporated herein by reference. Background Art

[0003] Secondary batteries have high applicability depending on product groups and electrical characteristics such as high energy density, and are therefore generally applied not only to portable devices but also to electric vehicles (EVs) or hybrid electric vehicles (HEVs) driven by power supplies. Such secondary batteries are gaining attention as a new energy source to improve eco-friendliness and energy efficiency because they have the main advantage of not only significantly reducing the use of fossil fuels but also having no byproducts generated by the use of energy.

[0004] Currently widely used secondary batteries include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, etc. The operating voltage of a unit secondary battery cell (i.e., a unit battery cell) is about 2.5V to 4.5V. Therefore, if a higher output voltage is required, a plurality of battery cells can be connected in series to configure a battery pack. In addition, depending on the required charge / discharge capacity of the battery pack, a plurality of battery cells can be connected in parallel to configure a battery pack. Therefore, the number of battery cells included in the battery pack can be set differently according to the required output voltage or the required charge / discharge capacity.

[0005] Meanwhile, after the electrode assembly in the form of a rolled core with a welded current collector is inserted into the battery can, alignment of the battery cell is required to weld the current collector and the curling portion of the battery can. At this time, due to the driving characteristics of the equipment, welding and movement are performed while rotating in a rotating form, so that the rotation and sliding phenomenon of the battery cell occurs in the existing general clamp type. Therefore, in order to meet the welding quality, it is necessary to develop a clamp in a form in which rotation or sliding of the battery does not occur. Summary of the invention

[0006] Technical issues

[0007] An object of the present disclosure is to provide a holder in which the position and angle of a battery are not changed during movement after the position is accurately aligned to a welding position in a rotary drive device.

[0008] That is, one object of the present disclosure is to prevent the sliding phenomenon of the battery.

[0009] Furthermore, another object of the present disclosure is to improve the position alignment and welding position inspection yield of the battery.

[0010] On the other hand, yet another object of the present disclosure is to improve welding quality.

[0011] However, the technical problems to be solved by the present disclosure are not limited to the above problems, and those skilled in the art can clearly understand other problems not mentioned herein through the following description of the present disclosure.

[0012] Technical Solution

[0013] An object of the present disclosure is to provide a holder in which the position and angle of a battery are not changed during movement after the position is accurately aligned to a welding position in a rotary drive device.

[0014] That is, one object of the present disclosure is to prevent the sliding phenomenon of the battery.

[0015] Furthermore, another object of the present disclosure is to improve the position alignment and welding position inspection yield of the battery.

[0016] On the other hand, yet another object of the present disclosure is to improve welding quality.

[0017] However, the technical problems to be solved by the present disclosure are not limited to the above problems, and those skilled in the art can clearly understand other problems not mentioned herein through the following description of the present disclosure.

[0018] Beneficial Effects

[0019] According to the present disclosure, it is possible to prevent a battery from slipping by holding the battery using magnetic force when moving from a rotating member to a welding head.

[0020] On the other hand, according to the present disclosure, it can be expected to improve the position alignment and welding position inspection yield of the battery.

[0021] In yet another aspect, according to the present disclosure, welding quality may be improved.

[0022] However, the effects to be obtained by the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned herein may be clearly understood by those skilled in the art from the following description of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, are used to provide a further understanding of the technical features of the present disclosure, and thus the present disclosure is not to be construed as being limited to the accompanying drawings.

[0024] Figure 1 2 is a view for describing a battery holder according to an embodiment of the present disclosure.

[0025] Figure 2 Is used to describe the battery installed in Figure 1 A view of the status of the battery holder.

[0026] Figure 3 is along Figure 2 A cross-sectional view taken along line AA' in FIG.

[0027] Figure 4 is a view for describing a battery holder according to another embodiment of the present disclosure.

[0028] Figure 5 is a view for describing a battery holder according to still another embodiment of the present disclosure.

[0029] Figure 6 is a view for describing a battery holder according to still another embodiment of the present disclosure.

[0030] Figure 7 is a view for describing a process in which a battery enters a battery holder according to an embodiment of the present disclosure.

[0031] Figure 8 is a view for describing a process of aligning the position of a battery in the battery holder according to an embodiment of the present disclosure after the battery enters.

[0032] Fig. 9 is a view for describing a process in which the first side support of the battery holder according to the embodiment of the present disclosure advances toward the battery after aligning the position of the battery. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings. Before the description, it should be understood that the terms used in the specification and the appended claims should not be interpreted as limited to the general and dictionary meanings, but are interpreted based on the principle that the inventor is allowed to appropriately define the terms for the best interpretation, based on the meanings and concepts corresponding to the technical aspects of the present disclosure.

[0034] Therefore, the descriptions presented herein are merely preferred examples for illustrative purposes, and are not intended to limit the scope of the present disclosure, and it should be appreciated that other equivalents and modifications may be made thereto without departing from the scope of the present disclosure.

[0035] The conventional battery clamp has a general clamp form without a separate anti-slip function in the clamp when the battery switches and rotates. In a cylindrical battery, after the electrode assembly in the form of a roll core with a current collector plate CP welded to the battery can is inserted into the battery can, alignment of the battery is required for welding the current collector plate CP and the curling portion BD of the battery can. At this time, due to the driving characteristics of the equipment, welding and movement are performed while rotating in a rotating form, so that the rotation and sliding phenomenon of the battery occurs in the existing general clamp type. That is, in the conventional battery fixing device, there is no mechanism or shape to prevent the battery from sliding in the clamp, resulting in sliding. Therefore, in order to meet the welding quality, it is necessary to develop a clamp in a form where the battery does not rotate or slide.

[0036] Therefore, the present inventors carefully examined the configuration for preventing rotation or sliding when welding the beaded portion BD of a cylindrical battery, and thus designed the battery holder 1 of the present disclosure, which will be referred to below. Figures 1 to 9 Detailed description.

[0037] Figure 1 is a view for describing a battery holder 1 according to an embodiment of the present disclosure, and Figure 2 Is used to describe the battery installed in Figure 1 A view of the status of the battery holder 1.

[0038] Reference Figure 1 and Figure 2 , a battery holder 1 according to an embodiment of the present disclosure includes a side support 10 and a lower support 20 .

[0039] Here, the side support 10 may support the side surface of the battery cell B. For example, when the battery cell B is a cylindrical battery cell B, the side support 10 may be configured to have a substantially arc shape so as to be able to support the side surface 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 in a form surrounding the side surface of the cylindrical battery cell B. The side support 10 may support at least some areas of the side surface of the battery cell B. For example, as Figure 1 and Figure 2 As shown, the side support 10 may be provided in the form of a plurality of arcuate ribs. Alternatively, in another embodiment, the side support 10 may also be provided in the form of a single arcuate rib. Alternatively, in another embodiment, the side support 10 may also have a curved shape that completely surrounds the side surface of the cylindrical battery cell B.

[0040] In one aspect of the present disclosure, at least one first magnet adapter 11 may be provided in at least some areas of the side support 10. Here, the first magnet adapter 11 may be configured to face the battery cell B. In addition, the first magnet adapter 11 may have a first magnet 12 embedded therein. Here, the first magnet 12 embedded in the first magnet adapter 11 may be configured to face the battery cell B. For example, referring to Figure 2 , the first magnet 12 may be configured to face the battery cell B. More specifically, the first magnet 12 may be embedded in a space within the first magnet adapter 11 , and may be exposed toward the outside of the first magnet adapter 11 through a predetermined hole provided in the first magnet adapter 11 .

[0041] According to the configuration of the present disclosure, since the battery case of the battery cell B is made of a metal material, a magnetic force acts between the first magnet 12 and the battery case. Therefore, the battery can be accurately fixed to a specific position in the battery holder 1. That is, the first magnet 12 holds the battery cell B using a magnetic force, thereby preventing the battery cell B from sliding. Therefore, the position alignment of the battery cell B and the welding position inspection yield can be improved, and the welding quality can be improved.

[0042] In another aspect of the present disclosure, the first magnet adapter 11 may be configured to be detachable from the side support 10 .

[0043] For example, refer to Figure 1 and Figure 2 , the side support 10 has some space recessed therein to accommodate the first magnet adapter 11, and the first magnet adapter 11 can be accommodated in the space. The magnet adapter can be fixed to the side support 10. The fixing method can be, for example, a threaded connection, but the connection method is not limited thereto. On the other hand, the first magnet adapter 11 can also be removed from the side support. That is, the first magnet adapter 11 can be configured to be removable from the side support 10.

[0044] According to such a configuration of the present disclosure, in some cases, the strength of the magnetic force acting on the battery can be easily adjusted. For example, when the type of the battery cell B changes or the material of the battery can of the battery cell B changes, it may be necessary to adjust the strength of the magnetic force for fixing the battery cell B. In this case, by removing the installed first magnet adapter 11 and then installing another first magnet adapter 11, the strength of the magnetic force can be easily adjusted without replacing the entire clamp or the entire side support 10. That is, if only the outer shape of the first magnet adapter 11 and the size of the space recessed in the side support 10 are constant, the battery clamp 1 can be used by replacing various types of adapters consisting of various types or sizes of first magnets 12 embedded in the first magnet adapter 11.

[0045] In another aspect of the present disclosure, the first magnet adapter 11 may be provided in at least some areas of the side support 10 .

[0046] For example, refer to Figure 1 and Figure 2 The first magnet adapter 11 may be arranged in a plurality of positions along the outer peripheral surface of the battery cell B and spaced apart from each other by a predetermined distance. Figure 1 and Figure 2 In the embodiment, the first magnet adapter 11 is provided in three along the side facing the battery cell B, but the embodiment of the present disclosure is not limited thereto. For example, the first magnet adapter 11 may be provided in a single number, or may be provided in a plurality of numbers. Figure 1 and Figure 2 A greater number of implementations are provided.

[0047] At the same time, according to the structure in which the first magnet adapter 11 is provided in plurality, the anti-skid effect of the battery cell B can be further improved. For example, when the first magnet adapter 11 is provided in plurality, the magnitude of the attractive force acting between the first magnet adapter 11 and the battery cell B becomes stronger, so that the tangential anti-skid effect of the battery cell B can be further improved.

[0048] Figure 3 is along Figure 2 A cross-sectional view taken along line AA' in FIG.

[0049] Reference Figure 3 , the first magnet adapter 11 of the battery holder 1 according to the embodiment of the present disclosure 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. Therefore, the first magnet 12 embedded in 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.

[0050] According to this structure, by preventing the first magnet adapter 11 and / or the first magnet 12 from directly contacting the battery cell B, scratches can be prevented from occurring on the battery can of the battery cell B. That is, since the first magnet 12 applies a magnetic force even when not in direct contact with the battery cell B, it does not necessarily have to be in contact with the battery cell B. Instead, it is preferably spaced a predetermined distance from the battery cell B to prevent the occurrence of scratches. However, if the gap between the first magnet 12 and the battery cell B is too far, the strength of the magnetic force is also weakened, so it is not preferable that the gap becomes too large.

[0051] In another aspect of the present disclosure, the side support 10 and the lower support 20 may include a resin material.

[0052] 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 polyetheretherketone (PEEK) material. Since the side support 10 and the lower support 20 are components that are in direct contact with the battery cell B, if the side support 10 and the lower support 20 include a material having a high hardness, there is a high possibility that scratches will occur in the battery cell B. Therefore, it is preferred to include a resin material that does not cause scratches while having a predetermined hardness. For example, since the polyetheretherketone (PEEK) material has a certain hardness level and is also highly brittle, it can be applied to the side support 10 and the lower support 20 of the present disclosure.

[0053] Likewise, 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 polyetheretherketone (PEEK) material.

[0054] Likewise, the second magnet adapter 21 to 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 polyetheretherketone (PEEK) material.

[0055] In another aspect of the present disclosure, the first magnet 12 may be made of an electromagnet. Likewise, the second magnet 22 to be described later may be made of an electromagnet. In this case, additional components required to operate the electromagnet may be included as components of the present disclosure.

[0056] In this way, when the first magnet 12 and / or the second magnet 22 are made 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 .

[0057] Figure 4 2 is a view for describing a battery holder 1 according to another embodiment of the present disclosure.

[0058] Reference Figure 4 , the size of the first magnet 12 of the battery holder 1 according to another embodiment of the present disclosure may be different. Alternatively, as shown in the figure, the size 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 size of the hole provided in the first magnet adapter 11 may be larger or smaller.

[0059] According to this structure, various types of magnet adapters having various magnetic forces can be configured by changing the size of the first magnet 12 embedded in the first magnet adapter 11. Alternatively, various types of magnet adapters having various magnetic forces can be configured by changing the size of the hole provided in the first magnet adapter 11. Therefore, various magnetic forces can be applied according to the situation.

[0060] Figure 5 2 is a view for describing a battery holder 1 according to still another embodiment of the present disclosure.

[0061] Reference Figure 5 According to yet another embodiment of the present disclosure, the gap S between the surface of the first magnet adapter 11 facing the battery cell B and the battery cell B may be different.

[0062] For example, Figure 5 As shown, the gap S between the surface of the first magnet adapter 11 facing the battery cell B and the battery cell B may be greater than Figure 1 In this case, the magnitude of the magnetic force acting on the battery cell B can be smaller. Alternatively, the gap S between the surface of the first magnet adapter 11 facing the battery cell B and the battery cell B can be smaller than Figure 1 In this case, the magnitude of the magnetic force acting on the battery cell B can be greater.

[0063] According to this structure, various types of magnet adapters having various magnetic forces can be configured by changing the gap S between the first magnet adapter 11 and the battery cell B.

[0064] Figure 6 2 is a view for describing a battery holder 1 according to still another embodiment of the present disclosure.

[0065] refer to Figure 6 The first magnet adapter 11 according to still another embodiment of the present disclosure may be configured to have a curved shape along a curved surface of the side support 10 .

[0066] For example, Figure 6 As shown, the first magnet adapter 11 may be configured to have a substantially arc shape along the outer peripheral surface of the cylindrical battery cell B. In this case, the first magnet 12 embedded in the first magnet adapter 11 may also be similarly configured to have an arc shape. At the same time, the hole provided in the first magnet adapter 11 may also be configured to have an arc shape, and in some cases, may also be configured in the form of a plurality of circles.

[0067] According to this structure, even with a single magnet adapter, a strong magnetic force can be ensured.

[0068] Refer again Figures 1 to 3The battery holder 1 according to the embodiment of the present disclosure may further include a second magnet adapter 21 and a second magnet 22. More specifically, the battery holder 1 may include: a second magnet adapter 21 disposed in at least some areas of the lower support 20; and a second magnet 22 embedded in the second magnet adapter 21 and configured to face the battery cell B.

[0069] According to this structure, the magnetic force acts on the battery cell B from the first magnet 12 in the lateral direction, and the magnetic force acts on the lower part of the battery cell B from the second magnet 22, thereby further strengthening the fixing force of the battery cell B. That is, the anti-slip effect of the battery cell B can be improved.

[0070] In one aspect of the present disclosure, the second magnet adapter 21 may be configured to be detachable from the lower support 20 .

[0071] For example, refer to Figures 1 to 3 , the second magnet adapter 21 may be located in a downward direction of the battery cell B. In this case, the second magnet adapter 21 may be movable in a direction parallel to the central axis C of the battery cell B. For example, the second magnet adapter 21 may advance toward the battery cell B in a direction parallel to the central axis C of the battery cell B. In addition, the second magnet adapter 21 may retreat from the battery cell B in a direction parallel to the central axis C of the battery cell B. Alternatively, the second magnet adapter 21 may advance and / or retreat in a lateral direction through the space between the lower supports 20.

[0072] Since the second magnet adapter 21 is configured to be detachable from the lower support 20 in this manner, it is possible to easily align the position and angle of the battery cell B. This also enables the battery cell B to enter the next rotation stage.

[0073] In another aspect of the present disclosure, the second magnet adapter 21 may have a substantially disc shape.

[0074] For example, refer to Figure 1 and Figure 3 , the second magnet adapter 21 has a substantially disc shape. Alternatively, the second magnet adapter 21 may also have a cylindrical shape of 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.

[0075] According to this structure, when the second magnet adapter 21 rotates, the battery cell B can be rotated by an angle equal to the rotation angle of the second magnet adapter 21. For example, when the battery cell B enters the battery holder 1, the welding position of the curling portion BD and the current collector plate CP may not be in the correct position. In this case, by rotating the battery cell B by the rotation of the second magnet 22, the welding position between the curling portion BD and the current collector plate CP can be set to the correct position.

[0076] Preferably, the second magnet 22 may be disposed along the circumference of the second magnet adapter 21 .

[0077] For example, refer to Figure 1 and Figure 3 , the second magnet 22 can be embedded in the second magnet adapter 21. In this case, when the second magnet adapter 21 has a substantially disc shape, the second magnet 22 can be configured as a substantially annular magnet embedded in the disc. Alternatively, the second magnet 22 can also be configured to have a substantially cylindrical shape, with its central axis C parallel to the central axis C of the second magnet adapter 21.

[0078] According to this structure, when the second magnet adapter 21 rotates, the battery cell B can rotate by an angle equal to the rotation angle of the second magnet adapter 21 .

[0079] In yet another aspect of the present disclosure, the second magnet adapter 21 may be configured to be rotatable relative to the central axis C of the battery cell B.

[0080] For example, the battery holder 1 according to an embodiment of the present disclosure 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 may rotate. As a result, the battery cell B may rotate due to the magnetic force applied by the second magnet 22 embedded in the second magnet adapter 21.

[0081] According to this structure, the battery cell B is rotated by rotating the second magnet 22, and the welding position between the curling portion BD and the current collecting plate CP can be set to the correct position. This will be referred to below. Figures 7 to 9 Detailed description.

[0082] Figure 7 1 is a view for describing a process in which a battery enters the battery holder 1 according to an embodiment of the present disclosure.

[0083] refer to Figure 1 and Figure 7, the side support 10 according to an embodiment of the present disclosure may include a first side support 10A and a second side support 10B. More specifically, the side support 10 may include: the first side support 10A, which includes the first magnet adapter 11; and the second side support 10B, which does not include the first magnet adapter 11. The first side support 10A may be a support configured so that the first magnet adapter 11 can be detached therefrom.

[0084] When the battery cell B enters the battery holder 1, the second side support member 10B may be arranged on the battery holder 1, such as Figure 7 As shown. When the battery cell B enters the battery holder 1, the first side support 10A may be spaced apart from the second side support 10B. Therefore, when the battery cell B enters the battery holder 1, the battery cell B may not be affected by the first magnet 12. That is, the battery cell B may enter to contact the second side support 10B without being affected by the first magnet 12 holder.

[0085] Figure 8 2 is a view for describing a process of aligning the position of the battery in the battery holder 1 according to the embodiment of the present disclosure after the battery enters.

[0086] refer to Figure 8 , the entering battery cell B can be located on the same axis as the second magnet adapter 21. At this time, the welding position between the curling portion BD of the battery cell B and the current collector CP may deviate from the correct position. In this case, the battery holder 1 can identify the misaligned angle. The battery holder 1 can rotate the second magnet adapter 21 by the misaligned angle. That is, the second magnet adapter 21 can be rotated by the misaligned angle relative to the center axis C. Therefore, the second magnet 22 embedded in the second magnet adapter 21 can also be rotated by a predetermined angle relative to the center axis C. As a result, due to the magnetic force of the second magnet 22, the battery cell B can also be rotated by a predetermined angle relative to the center axis C. That is, the battery cell B can be rotated by a misaligned angle. Finally, the battery cell B can be rotated so that the welding position between the curling portion BD and the current collector CP is set to the correct position.

[0087] Fig. 9 1 is a view for describing a process in which the first side support 10A of the battery holder 1 according to the embodiment of the present disclosure advances toward the battery after aligning the position of the battery.

[0088] refer to Fig. 9 , the first side support member 10A may be configured to be able to advance toward the battery cell B and retreat from the battery cell B.

[0089] Specifically, only after the welding position between the curling portion BD of the battery cell B and the current collector plate CP is set to the correct position, the first side support 10A can move toward the battery cell B. The first side support 10A can fix the battery cell B so that it no longer rotates in the circumferential direction. That is, the second magnet adapter 21 can be rotated to accurately set the welding position between the curling portion BD and the current collector plate CP of the battery cell B, and then the first magnet adapter 11 can fix the accurate set position. Therefore, the battery cell B can be prevented from sliding by holding the battery cell B with magnetic force. Therefore, it can be expected that the position alignment and welding position inspection yield of the battery cell B can be improved, and the welding quality can be improved.

[0090] Meanwhile, the second magnet adapter 21 may be configured to be able to advance toward the battery cell B and retreat from the battery cell B.

[0091] That is, when the welding position between the bead portion BD and the current collecting plate CP is set and fixed to a correct position, the second magnet adapter 21 may retreat in a direction away from the battery cell B. Therefore, the battery cell B may move to the next rotation stage.

[0092] The present disclosure has been described above with respect to a limited number of embodiments and drawings, but the present disclosure is not limited thereto, and it is apparent to those skilled in the art that various modifications and changes may be made thereto within the technical aspects of the present disclosure and the equivalent scope of the appended claims.

[0093] [Explanation of Reference Numerals]

[0094] 1: Battery holder

[0095] 10: Side support

[0096] 10A: First side support member

[0097] 10B: Second side support member

[0098] 11: First magnet adapter

[0099] 12: First magnet

[0100] 20: Lower support

[0101] 21: Second magnet adapter

[0102] 22: Second magnet

[0103] B: Battery Cell

[0104] BD: Hemming Department

[0105] CP: Current collector

[0106] C: Central axis

Claims

1. A battery holder, comprising: a side support member, the side support member supporting a side surface of the battery cell; at least one first magnet adapter disposed in at least some areas of the side support; a first magnet embedded in the first magnet adapter and configured to face the battery cell; as well as A lower support member supports the lower surface of the battery cell.

2. The battery holder according to claim 1, in, The first magnet adapter is configured to be detachable from the side support.

3. The battery holder according to claim 1, in, The first magnet adapters are provided as a plurality of first magnet adapters spaced apart from each other by a predetermined distance along an outer circumferential surface of the battery cell.

4. The battery holder according to claim 1, comprising: a second magnet adapter disposed in at least some areas of the lower support; as well as A second magnet is embedded in the second magnet adapter and is configured to face the battery cell.

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

6. The battery holder according to claim 4, in, The second magnet adapter has a disc shape.

7. The battery holder according to claim 4, in, The second magnets are arranged along a circumferential direction of the second magnet adapter.

8. The battery holder according to claim 4, in, The second magnet adapter is configured to be rotatable relative to a central axis of the battery cell.

9. The battery holder according to claim 4, comprising: A motor is connected to the second magnet adapter.

10. The battery holder according to claim 1, in, The side support comprises: a first side support comprising the first magnet adapter; and A second side support, said second side support not including said first magnet adapter.

11. The battery holder according to claim 10, in, The first side support is configured to: advancing toward the battery cell; and Step back from the battery cell.

12. The battery holder according to claim 4, in, The second magnet adapter is configured to: advancing toward the battery cell; and Step back from the battery cell.

13. The battery holder according to claim 1, in, The side support and the lower support include a resin material.

Images