Battery module assembly, energy storage device and handling method for energy storage device

Abstract

The present application relates to the field of energy storage technology, and discloses a battery module assembly, an energy storage device, and a handling method for an energy storage device. The battery module assembly comprises one battery module and two handles. The battery module comprises battery cells, a housing, and two connecting members. The battery cells are located within the housing, and the two connecting members are fixed to the housing. The two handles are configured to be fixed to the connecting members and to lift the battery module. Each handle comprises a gripping portion and a hook portion connected to the gripping portion, the hook portion comprises a first space, and the first space is configured to accommodate a part of the connecting member. The hook portion is configured to be fixed to the connecting member and to be detachably connected to the connecting member. During battery module handling, the two handles are respectively moved to the two connecting members, and the hook portion of each handle is correspondingly disposed on each connecting member, so that the hook portions and the connecting members form a fixed connection, which facilitates handling of the battery module by means of the gripping portions of the handles. After handling, the hook portions are detached from the connecting members, which facilitates reducing interference between battery modules.

Description

Battery module components, energy storage devices, and methods for handling energy storage devices Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a battery module assembly, an energy storage device, and a method for handling the energy storage device. Background Technology

[0002] Battery modules are generally quite heavy, often requiring two or more workers to move them. To facilitate handling, existing technologies have recessed sections on the sides of the battery module casing, which is not conducive to moving the battery module.

[0003] Summary of the Invention

[0004] In view of this, this application provides a battery module assembly, energy storage device, and a method for handling the energy storage device that helps reduce interference between battery modules.

[0005] In a first aspect, this application provides a battery module assembly, including a battery module and two handles. The battery module includes a battery cell, a housing, and two connectors. The battery cell is located within the housing, and the two connectors are fixed to the housing. The two handles are configured to be fixed to the connectors and to lift the battery module. Each handle includes a grip portion and a hook portion connected to the grip portion. The hook portion includes a first space configured to receive portions of the connectors. The hook portion is configured to be fixed to and detachably connected to the connectors.

[0006] When moving the battery module, move the two handles to the two connectors respectively, and attach the hooks of each handle to the corresponding connectors to secure them. This facilitates moving the battery module by gripping the handles. After moving, detach the hooks from the connectors to reduce interference between battery modules.

[0007] In one or more of the above embodiments, the connector includes a connecting portion, and a hook portion is detachably disposed on the connecting portion. The hook portion includes a fixing portion and a bending portion, the fixing portion connecting the gripping portion and the bending portion, the bending portion forming a first space, and the bending portion being configured to be fixed to the connecting portion.

[0008] In the above embodiments, the bending portion facilitates the formation of the first space.

[0009] In one or more of the above embodiments, the curved portion includes a first segment, a bent segment, and a second segment connected in sequence. The first segment connects the fixing portion and the bent segment. The second segment, the first segment, and the bent segment form a first space. The second segment is spaced apart from the fixing portion and forms a first opening. The first opening is configured so that the connector enters and exits the first space through the first opening.

[0010] In the above embodiments, it is advantageous for the connecting part to enter and exit the first space through the first opening, thereby improving the convenience of the hook being detachably provided on the connector and fixed to the connector.

[0011] In one or more of the above embodiments, the connector includes a base fixed to the housing. Along a first direction, the connector and the base are spaced apart to form a first gap. The first gap is configured to accommodate a bent portion, the first direction being the direction of gravity. The bent portion is configured to rotate about the connector.

[0012] In the above embodiments, the first gap facilitates the rotation of the bent portion around the connecting portion.

[0013] In one or more of the above embodiments, along the first direction, the distance of the first gap is h1 mm, and the second segment includes an end face facing the fixing part. Along the first direction, the distance between the end face and the first space is h2 mm, where h1 < h2.

[0014] In the above embodiments, when the bending part rotates to the point where the extension direction of the second segment is parallel to the first direction, h2 being greater than h1 helps to reduce the possibility of the bending part separating from the connecting part in the direction perpendicular to the first direction, thereby helping to reduce the risk of the battery module falling due to the bending part separating from the connecting part during transportation.

[0015] In one or more of the above embodiments, 0.5 ≤ h1 ≤ 0.5 * h2.

[0016] In the above embodiments, it is beneficial to further reduce the possibility of the bent part separating from the connecting part in a direction perpendicular to the first direction, thereby further reducing the risk of the battery module falling due to the bending part separating from the connecting part during transportation.

[0017] In one or more of the above embodiments, 4≤h2≤10.

[0018] The above embodiments are convenient to operate and help to further reduce the possibility of the bent part separating from the connecting part in a direction perpendicular to the first direction, thereby improving the convenience of fixing or detaching the bent part from the connecting part.

[0019] In one or more of the above embodiments, the handle is configured to lift the battery module at a first angle, the first angle being the angle formed by the fixing part and the direction of gravity, and the size of the first angle is D, 120°≤D≤180°.

[0020] In the above embodiments, the first angle satisfies 120°≤D≤180°, which helps to improve the convenience of lifting the battery module by the handle.

[0021] In one or more of the above embodiments, the curved portion has a first arc surface, which is configured to rotate about the connecting portion.

[0022] In the above embodiments, it is beneficial to reduce the wear of the bending part on the connecting part during the process of the bending part rotating around the connecting part.

[0023] In one or more of the above embodiments, the connector includes two limiting portions disposed on the base, and the connecting portion is disposed between the two limiting portions and fixed to the two limiting portions. The hook portion is configured to move between the two limiting portions.

[0024] In the above embodiments, when the hook is provided on the connecting part, the two limiting parts help to restrict the hook and improve the stability of the hook and the connecting part being fixed.

[0025] In one or more of the above embodiments, the hook and one of the limiting parts form a second gap, the distance of the second gap being d mm, where 0 < d ≤ 1.

[0026] In the above embodiments, when the battery module is transported, the bent part moves between the two limiting parts, which is beneficial for transport.

[0027] In one or more of the above embodiments, the connector includes at least two connecting portions, which are spaced apart along a second direction, and the first direction is perpendicular to the second direction. The handle includes at least two hooks, which are connected to the gripping portion and are spaced apart.

[0028] In the above embodiments, by fixing multiple hooks and connecting parts one by one, it is beneficial to increase the number of force application points on the battery module during transportation. Furthermore, the force application points are spaced apart from each other in the second direction, which helps to improve the balance of the battery module during transportation.

[0029] In one or more of the above embodiments, the housing includes a top wall and a bottom wall disposed opposite each other along a first direction. The top wall includes a main body portion and a protrusion extending beyond the main body portion. A connector is disposed on the main body portion. The protrusion extends beyond the connector in a direction opposite to the first direction.

[0030] The above embodiments help reduce interference between the connectors and other external components.

[0031] In one or more of the above embodiments, the protrusion is provided with a first groove, and the connecting portion faces the first groove.

[0032] In the above embodiments, when the bent portion is fixedly or detachably connected to the connecting portion, the first groove facilitates the avoidance of the hook portion.

[0033] In one or more of the above embodiments, the bottom wall includes a recess and a second groove, the recess being configured to accommodate a protrusion of another battery module. The second groove is configured to accommodate a connector of the other battery module.

[0034] In the above embodiments, the cooperation of the protrusions and recesses facilitates the initial positioning of the battery modules during the stacking process, thereby improving the efficiency of stacking battery modules. The second slot, which accommodates the connector of another battery module, helps reduce interference between battery modules during stacking.

[0035] In one or more of the above embodiments, the battery module includes a first connector and a second connector, the first connector being disposed in the protrusion and the second connector being disposed in the recess. The first connector is configured to connect to the second connector of another battery module.

[0036] In the above embodiments, the cooperation of the protrusions and concave parts during stacking facilitates the connection between the second connector and the first connector.

[0037] In one or more of the above embodiments, when viewed along the first direction, the two connectors are located on both sides of the protrusion along the second direction. The first direction is perpendicular to the second direction.

[0038] In the above embodiments, it is beneficial to keep the battery module balanced during transportation and to save effort.

[0039] In a second aspect, this application provides an energy storage device comprising a plurality of battery modules as described in the first aspect of this application and at least two handles as described in the first aspect of this application.

[0040] The reusable handles on different battery modules improve the ease of moving multiple battery modules.

[0041] A third aspect of this application provides a method for handling an energy storage device, comprising the following steps: moving a handle toward a connector along a first direction until a first space is located on the side of the connector along a third direction, where the first direction is the direction of gravity. Moving the handle toward the connector along the third direction or in a direction opposite to the third direction, causing the connector to enter the first space. Operating a gripping part to rotate a hook relative to the connector, thereby fixing the connector and the hook. After transporting the battery module to a designated position, operating the gripping part to rotate the hook relative to the connector. Moving the handle away from the connector along a direction opposite to the third direction or along the third direction until the first space is located on the side of the connector along the third direction. Separating the hook and the connector in a direction opposite to the first direction. Repeating the above steps to transport the next battery module.

[0042] In one or more of the above embodiments, multiple battery modules are stacked along a first direction.

[0043] The above embodiments help reduce interference between battery modules and improve the stability of multiple battery modules stacked in the energy storage device. Attached Figure Description

[0044] Figure 1 is a schematic diagram of the disassembly of the handle and connector provided in an embodiment of this application.

[0045] Figure 2 is an enlarged view of region A in Figure 1.

[0046] Figure 3 is a schematic diagram of a handle provided on a connector according to an embodiment of this application.

[0047] Figure 4 is an enlarged view of region B in Figure 3.

[0048] Figure 5 is a structural schematic diagram of a connector provided in an embodiment of this application.

[0049] Figure 6 is a schematic diagram of the handle provided in one embodiment of this application.

[0050] Figure 7 is a schematic diagram of the handle after it has been rotated around the connector according to an embodiment of this application.

[0051] Figure 8 is a schematic diagram of a first angle provided in an embodiment of this application.

[0052] Figure 9 is a schematic diagram of a handle connected to a connector according to an embodiment of this application.

[0053] Figure 10 is an enlarged view of region C in Figure 9.

[0054] Figure 11 is a schematic diagram of the distance of the second gap provided in an embodiment of this application.

[0055] Figure 12 is a schematic diagram of a battery module provided in an embodiment of this application.

[0056] Figure 13 is a flowchart of a method for transporting an energy storage device according to an embodiment of this application.

[0057] Figure 14 is a schematic diagram of a stacked arrangement of multiple battery modules provided in an embodiment of this application.

[0058] Key Component Symbols: Battery Module Assembly 10: Top Wall 101, Main Body 1011, Protrusion 1012, First Groove 1013, Bottom Wall 102, Recess 1021, Second Groove 1022; Battery Module 11: Housing 111, Connector 112, First Gap 112a, Second Gap 112b, Connecting Part 1121, Base 1122, Limiting Part 1123, First Connector 113, Second Connector 114, Handle 12, First Opening 12a, Grip Part 121, Hook 122, Fixing Part 1221, Bending Part 1222, First Segment 1223, Bending Segment 1224, Second Segment 1225, End Face 1225a, First Arc Surface 1226, Second Arc Surface 1227, First Direction X, Second Direction Y, Third Direction Z, First Space Q Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0060] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component present. When a component is considered to be "located" to another component, it can be directly mounted on the other component or there may be an intervening component present.

[0061] Unless otherwise stated, the term "multiple" as used herein refers to two or more.

[0062] The terms “first”, “second”, etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implying the quantity, specific order, or primary and secondary relationship of the indicated technical features.

[0063] The term "perpendicular" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately perpendicular. For example, in numerical terms, perpendicularity can refer to the angle between two straight lines within the range of 90° ± 10°, the dihedral angle between two planes within the range of 90° ± 10°, or the angle between a straight line and a plane within the range of 90° ± 10°.

[0064] The term "parallel" is used to describe an ideal state between two components. In actual production or use, two components can exist in a state that is approximately parallel. For example, combined with numerical descriptions, parallel can refer to the angle between two straight lines within the range of 180° ± 10°, the dihedral angle between two planes within the range of 180° ± 10°, and the angle between a straight line and a plane within the range of 180° ± 10°.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0066] This application discloses a battery module assembly, including a battery module and two handles. The battery module includes a battery cell, a housing, and two connectors. The battery cell is located inside the housing, and the two connectors are fixed to the housing. The two handles are configured to be fixed to the connectors and to lift the battery module. Each handle includes a grip portion and a hook portion connected to the grip portion. The hook portion includes a first space configured to receive portions of the connectors. The hook portion is configured to be fixed to the connectors and detachably connected to the connectors.

[0067] When moving the battery module, move the two handles to the two connectors respectively, and attach the hooks of each handle to the corresponding connectors to secure them. This facilitates moving the battery module by gripping the handles. After moving, detach the hooks from the connectors to reduce interference between battery modules.

[0068] Some embodiments of this application will now be described with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0069] Referring to Figures 1 to 4, one embodiment of this application provides a battery module assembly 10, including a battery module 11 and two handles 12.

[0070] The battery module 11 includes a battery cell (not shown), a housing 111, and two connectors 112. The battery cell is located inside the housing 111, and the two connectors 112 are fixed to the housing 111.

[0071] Two handles 12 are configured to be fixed to connectors 112 and to lift the battery module 11, with one handle 12 corresponding to one connector 112. Each handle 12 includes a grip portion 121 and a hook portion 122, which are connected. The hook portion 122 includes a first space Q configured to receive a portion of the connector 112. The hook portion 122 is configured to be fixed to and detachably connected to the connector 112.

[0072] When transporting the battery module 11, the two handles 12 are moved to the two connectors 112 respectively, and the hooks 122 of each handle 12 are correspondingly disposed on the connectors 112, so that the hooks 122 and the connectors 112 are fixed, which facilitates the transport of the battery module 11 by the gripping parts 121 of the handles 12. After transport, the hooks 122 are detached from the connectors 112, which helps to reduce interference between the battery modules 11.

[0073] In some embodiments, please refer to FIG5, the connector 112 includes a connecting portion 1121, and a hook portion 122 is detachably provided on the connecting portion 1121.

[0074] In some embodiments, the connector 112 includes at least two connecting portions 1121, which are spaced apart along a second direction Y. The first direction X is perpendicular to the second direction Y.

[0075] In some embodiments, the handle 12 includes at least two hooks 122, which are connected to the gripping portion 121 and are spaced apart. By fixing the multiple hooks 122 to the connecting portion 1121 in a one-to-one correspondence, it is beneficial to increase the number of force application points on the battery module 11 during transportation, and the force application points are spaced apart from each other in the second direction Y, which is beneficial to improve the balance of the battery module 11 during transportation.

[0076] In some embodiments, the connecting portions 1121 of the two connectors 112 are parallel to each other.

[0077] In some embodiments, referring to FIG6, the hook portion 122 includes a fixing portion 1221 and a bending portion 1222, the fixing portion 1221 connecting the gripping portion 121 and the bending portion 1222. The bending portion 1222 forms a first space Q. The bending portion 1222 is configured to be fixed to the connecting portion 1121. The bending portion 1222 facilitates the formation of the first space Q. In some embodiments, the bending portion 1222 is configured to be detachably connected to the connecting portion 1121.

[0078] In some embodiments, referring to FIG6, the curved portion 1222 includes a first segment 1223, a bent segment 1224, and a second segment 1225 connected in sequence. The first segment 1223 connects the fixing portion 1221 and the bent segment 1224. The second segment 1225, the first segment 1223, and the bent segment 1224 form a first space Q. The second segment 1225 extends toward the fixing portion 1221, and the second segment 1225 is spaced apart from the fixing portion 1221 and forms a first opening 12a. The first opening 12a is configured so that the connector 112 enters the first space Q through the first opening 12a. This facilitates the convenience of the hook portion 122 being detachably provided to the connector 112 and fixed to the connector 112.

[0079] In some embodiments, after the connecting portion 1121 passes through the first opening 12a, each handle 12 can be moved toward the connector 112 in a third direction Z or in a direction opposite to the third direction Z, such that the first space Q accommodates the connecting portion 1121. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular to each other.

[0080] In some embodiments, the bent portion 1222 is configured to rotate about the connecting portion 1121. After the connecting portion 1121 and the bent portion 1222 are fixed together, the bent portion 1222 can rotate about the connecting portion 1121 as a pivot.

[0081] In some embodiments, the rotation plane of the bent portion 1222 is parallel to the plane defined by the first direction X and the third direction Z. During the rotation of the bent portion 1222, the relative position of the first opening 12a and the connecting portion 1121 changes accordingly.

[0082] In some embodiments, referring to Figures 7 and 8, the handle 12 is configured to lift the battery module 11 at a first angle. The first angle is the angle formed by the fixing part 1221 and the direction of gravity, and the magnitude of the first angle is D, where 120°≤D≤180°. The first angle satisfies 120°≤D≤180°, which helps to improve the convenience of lifting the battery module 11 by the handle 12.

[0083] In some embodiments, when the angle formed by the fixing part 1221 and the direction of gravity is 90°, each handle 12 can be moved away from the connector 112 in a direction opposite to or along the third direction Z, causing the connector 112 to exit the first space Q. The hook part 122 is moved in the opposite direction of the first direction X, causing the connector 1121 to pass through the first opening 12a, thereby detaching the hook part 122 from the connector 112.

[0084] In some embodiments, referring to FIG6, the bent portion 1222 has a first arcuate surface 1226, which is configured to rotate about the connecting portion 1121. This is beneficial to reduce wear on the connecting portion 1121 by the bent portion 1222 during the rotation of the bent portion 1222 about the connecting portion 1121.

[0085] In some embodiments, the first arc surface 1226 is the inner arc surface of the bent segment 1224.

[0086] In some embodiments, please refer to FIG6, the curved portion 1222 has a second arc surface 1227, which is disposed opposite to the first arc surface 1226.

[0087] In some embodiments, the second arc surface 1227 is the outer arc surface of the bent segment 1224.

[0088] In some embodiments, please refer to FIG5, the connector 112 includes a base 1122, which is fixed to the housing 111.

[0089] In some embodiments, along a first direction X, the connecting portion 1121 and the base portion 1122 are spaced apart to form a first gap 112a, and the first gap 112a is configured to accommodate the bent portion 1222. The first direction X is the direction of gravity. The first gap 112a facilitates the easy rotation of the bent portion 1222 around the connecting portion 1121.

[0090] In some embodiments, at least two connecting portions 1121 are spaced apart along the second direction Y on the base 1122.

[0091] In some embodiments, referring to Figures 9 and 10, the distance of the first gap 112a along the first direction X is h1 mm. The second segment 1225 includes an end face 1225a facing the fixing part 1221 (see Figure 6), and the distance between the end face 1225a and the first space Q is h2 mm, where h1 < h2. When the bent part 1222 rotates to the point where the extension direction of the second segment 1225 is parallel to the first direction X, h2 being greater than h1 helps to reduce the possibility of the bent part 1222 disengaging from the connecting part 1121 in a direction perpendicular to the first direction X, thereby reducing the risk of the battery module 11 falling due to the bent part 1222 disengaging from the connecting part 1121 during transportation.

[0092] In some embodiments, 0.5 ≤ h1 ≤ 0.5 * h2. This helps to further reduce the possibility of the bent portion 1222 detaching from the connecting portion 1121 in a direction perpendicular to the first direction X, thereby further reducing the risk of the battery module 11 falling due to the detachment of the bent portion 1222 from the connecting portion 1121 during transportation.

[0093] In some embodiments, 4 ≤ h2 ≤ 10. For example, h2 is 6. In some embodiments, when h2 is 6, 0.5 ≤ h1 ≤ 3. This facilitates operation and helps to further reduce the possibility of the bent portion 1222 disengaging from the connecting portion 1121 in a direction perpendicular to the first direction X, thereby improving the convenience of fixing or detaching the bent portion 1222 from the connecting portion 1121.

[0094] In some embodiments, the connector 112 includes two limiting portions 1123 disposed on the base 1122, and a connecting portion 1121 disposed between the two limiting portions 1123 and fixed to them. A hook portion 122 is configured to move between the two limiting portions 1123. When the hook portion 122 is located on the connecting portion 1121, the two limiting portions 1123 help to restrict the hook portion 122, improving the stability of the fixed connection between the hook portion 122 and the connecting portion 1121.

[0095] In some embodiments, please refer to FIG11, which is a simplified schematic diagram of the connecting portion 1121 and the two limiting portions 1123. When the connecting portion 1121 is connected to one of the limiting portions 1123, a second gap 112b is formed between the connecting portion 1121 and the other limiting portion 1123 along the second direction Y. The distance of the second gap 112b is d mm. In some embodiments, 0 < d ≤ 1. For example, d is 0.2, 0.5, 0.8, or 1. When the battery module 11 is handled, the bending portion 1222 moves between the two limiting portions 1123, which facilitates handling.

[0096] In some embodiments, referring to Figures 2 and 12, the housing 111 includes a top wall 101 and a bottom wall 102 disposed opposite each other along a first direction X. Referring also to Figure 4, the top wall 101 includes a main body portion 1011 and a protrusion 1012 protruding from the main body portion 1011. A connector 112 is provided on the main body portion 1011. The protrusion 1012 extends beyond the connector 112 in a direction opposite to the first direction X. This helps to reduce interference between the connector 112 and other external components.

[0097] In some embodiments, referring to Figures 2 and 4, the protrusion 1012 is provided with a first groove 1013, and the connecting portion 1121 faces the first groove 1013. When the bent portion 1222 is fixedly or detachably connected to the connecting portion 1121, the first groove 1013 facilitates the avoidance of the hook portion 122.

[0098] In some embodiments, viewed along the first direction X, the two connectors 112 are located on either side of the protrusion 1012 along the second direction Y. This facilitates maintaining the balance of the battery module 11 during handling and reduces effort.

[0099] In some embodiments, referring to FIG12, the bottom wall 102 includes a recess 1021 and a second groove 1022. The recess 1021 is configured to receive a protrusion 1012 of another battery module 11. The second groove 1022 is configured to receive a connector 112 of the other battery module 11. The cooperation between the protrusion 1012 and the recess 1021 facilitates the initial positioning of the battery modules 11 during the stacking process, thereby improving the efficiency of stacking the battery modules 11. The second groove 1022, which receives the connector 112 of the other battery module 11, helps to reduce interference between the battery modules 11 during stacking.

[0100] In some embodiments, referring to Figures 1 and 12, the battery module 11 includes a first connector 113 and a second connector 114. The first connector 113 is disposed on the protrusion 1012, and the second connector 114 is disposed on the recess 1021. The first connector 113 is configured to connect with the second connector 114 of another battery module 11. During stacking, the cooperation between the protrusion 1012 and the recess 1021 facilitates the connection between the second connector 114 and the first connector 113.

[0101] In some embodiments, the first connector 113 and the second connector 114 are hot-swappable connectors to realize electrical connection between battery modules 11.

[0102] One embodiment of this application provides an energy storage device including a plurality of battery modules 11 and at least two handles 12. For example, the energy storage device includes two, three, four or more battery modules 11 and only two handles 12. The handles 12, which can be reused on different battery modules 11, facilitate the handling of multiple battery modules 11.

[0103] Please refer to Figure 13. An embodiment of this application provides a method for transporting an energy storage device, including the following steps:

[0104] S1: Move handle 12 toward connector 112 along the first direction X until the first space Q is located on the side of connector 112 along the third direction Z, where the first direction X is the direction of gravity.

[0105] S2: Move handle 12 toward connector 112 in a direction opposite to or in the direction of third-party Z, so that connector 112 enters the first space Q.

[0106] S3: Operate the gripping part 121 to drive the hook part 122 to rotate relative to the connector 112, so that the connector 112 and the hook part 122 are fixed together.

[0107] S4: After moving the battery module 11 to the designated position, operate the grip 121 to drive the hook 122 to rotate relative to the connector 112.

[0108] S5: Move handle 12 away from connector 112 in the opposite direction to the third direction Z or in the third direction Z until the first space Q is located on the side of connector 112 in the third direction Z.

[0109] S6: Separate the hook 122 connector 112 in a direction opposite to the first direction X.

[0110] S7: Repeat the above steps to move the next battery module 11.

[0111] In some embodiments, step S1 includes step S101: aligning the first opening 12a with the connecting portion 1121 along the first direction X. This facilitates the connecting portion 1121 entering the first opening 12a.

[0112] In some embodiments, in step S101, the extension direction of the second segment 1225 is perpendicular to the first direction X. In some embodiments, in step S101, the angle formed by the fixing part 1221 and the gravity direction is 90°.

[0113] In some embodiments, in step S2, when the connector 112 contacts the first arc surface 1226, the connector 112 can be considered to have entered the first space Q.

[0114] In some embodiments, step S3 includes step S301: rotating the handle 12 in a direction away from the housing 111 with the connecting part 1121 as the pivot.

[0115] In some embodiments, in step S301, the handle 12 is rotated away from the housing 111 until the angle D formed by the fixing part 1221 and the direction of gravity satisfies 120°≤D≤180°.

[0116] In some embodiments, in step S301, the first arc surface 1226 rotates about the connecting portion 1121.

[0117] In some embodiments, step S4 includes step S401: after the battery module 11 is moved to the designated position, the handle 12 is rotated in the direction of approaching the housing 111 with the connecting part 1121 as the pivot.

[0118] In some embodiments, in step S401, the handle 12 is rotated toward the housing 111 until the angle formed by the fixing part 1221 and the direction of gravity is 90°.

[0119] In some embodiments, in step S6, the connecting portion 1121 extends through the first opening 12a.

[0120] In some embodiments, step S7 includes step S701: stacking multiple battery modules 11 along a first direction X (see FIG14). This helps reduce interference between battery modules 11 and improves the stability of the energy storage device when multiple battery modules 11 are stacked.

[0121] In some embodiments, in step S701, the next battery module 11 accommodates the connector 112 of the previous battery module 11.

[0122] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the substantive scope of this application fall within the scope of this application.

Claims

A battery module assembly, characterized in that, include: A battery module, the battery module comprising a battery cell, a housing, and two connectors fixed to the housing, the battery cell being located inside the housing; Two handles are configured to be fixed to the connector and to lift the battery module; each handle includes a grip portion and a hook portion connected to the grip portion, the hook portion including a first space configured to receive a portion of the connector; the hook portion is configured to be fixed to the connector and detachably connected to the connector. The battery module assembly as described in claim 1, characterized in that, The connector includes a connecting portion, and the hook portion is detachably provided on the connecting portion; The hook includes a fixed portion and a curved portion. The fixed portion connects the gripping portion and the curved portion. The curved portion forms the first space and is configured to be fixed to the connecting portion. The battery module assembly as described in claim 2, characterized in that, The curved portion includes a first segment, a bent segment, and a second segment connected in sequence, wherein the first segment connects the fixed portion and the bent segment; The second segment, the first segment, and the bent segment form the first space. The second segment is spaced apart from the fixed part and forms a first opening. The first opening is configured so that the connector enters the first space through the first opening. The battery module assembly as described in claim 3, characterized in that, The connector includes a base, which is fixed to the housing; Along a first direction, the connecting portion is spaced apart from the base portion to form a first gap; the first gap is configured to accommodate the curved portion, and the first direction is the direction of gravity; The curved portion is configured to rotate about the connecting portion. The battery module assembly as described in claim 4, characterized in that, Along the first direction, the distance of the first gap is h1 mm; The second segment includes an end face facing the fixing part, and along the first direction, the distance between the end face and the first space is h2 mm, where h1 < h2. The battery module assembly as described in claim 5, characterized in that, 0.5≤h1≤0.5*h2. The battery module assembly as described in claim 5 or 6, characterized in that, 4≤h2≤10。 The battery module assembly as described in any one of claims 4 to 7 is characterized in that, The handle is configured to lift the battery module at a first angle, the first angle being the angle between the fixing part and the weight. The angle formed by the direction of the force, the size of the first angle is D, 120°≤D≤180°. The battery module assembly as described in claim 8, characterized in that, The curved portion has a first arc surface, which is configured to rotate about the connecting portion. The battery module assembly as described in any one of claims 4 to 9 is characterized in that, The connector includes two limiting portions disposed on the base, and the connecting portion is disposed between the two limiting portions and fixed to the two limiting portions; The hook is configured to move between the two limiting portions. The battery module assembly as described in claim 10, characterized in that, The hook and one of the limiting parts form a second gap, the distance of the second gap being d mm, where 0 < d ≤ 1. The battery module assembly as described in any one of claims 1 to 11, characterized in that, The connector includes at least two connecting portions, which are spaced apart along a second direction, wherein the first direction is perpendicular to the second direction. The handle includes at least two hooks, which are connected to the gripping portion, and the hooks are spaced apart. The battery module assembly as described in any one of claims 4 to 10, characterized in that, The housing includes a top wall and a bottom wall disposed opposite to each other along the first direction. The top wall includes a main body portion and a protrusion protruding from the main body portion. The connecting member is disposed on the main body portion. The protrusion extends beyond the connector in a direction opposite to the first direction. The battery module assembly as described in claim 13, characterized in that, The protrusion is provided with a first groove, and the connecting part faces the first groove. The battery module assembly as described in claim 14, characterized in that, The bottom wall includes a recess and a second groove, the recess being configured to receive a protrusion of another battery module; the second groove being configured to receive a connector of another battery module. The battery module assembly as described in claim 15, characterized in that, The battery module includes a first connector and a second connector, the first connector being disposed on the protrusion and the second connector being disposed on the recess; the first connector is configured to connect to the second connector of another battery module. The battery module assembly as described in any one of claims 13 to 16, characterized in that, Viewed along the first direction, and along the second direction, the two connectors are located on either side of the protrusion; The first direction is perpendicular to the second direction. An energy storage device includes a plurality of battery modules as described in any one of claims 1 to 17 and at least two handles as described in any one of claims 1 to 17. A method for transporting an energy storage device as described in claim 18, characterized in that, Includes the following steps: Move the handle toward the connector along the first direction until the first space is located on one side of the connector along the third direction, where the first direction is the direction of gravity. Move the handle toward the connector in the third direction or in the opposite direction to the third direction, so that the connector enters the first space; By operating the gripping part, the hook part is driven to rotate relative to the connector, so that the connector and the hook part are fixed together; After the battery module is moved to the designated position, the gripping part is operated to drive the hook part to rotate relative to the connector. Move the handle away from the connector in the opposite direction to the third direction or in the third direction until the first space is located on the side of the connector in the third direction; Separate the hook and the connector in a direction opposite to the first direction; Repeat the above steps to move the next battery module. The method for handling energy storage devices as described in claim 19 is characterized in that, include: Multiple battery modules are stacked along the first direction.

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