Battery cell group limiting structure, battery module and battery pack

Abstract

The embodiment of the utility model provides a battery cell group limiting structure, a battery module and a battery pack, and the battery cell group limiting structure comprises a limiting frame which is provided with an accommodating space for accommodating a battery cell group; the adjusting mechanism comprises a fixing assembly and an adjusting assembly, the fixing assembly comprises a fixing seat and at least two movable parts connected to the two opposite sides of the fixing seat respectively, the fixing seat is arranged on the limiting frame, and the movable parts are used for facing the battery cell group; the adjusting assembly is used for driving the movable parts to get close to or away from each other to adjust the pre-tightening force of the movable parts relative to the battery cell group. According to the battery cell group limiting structure, the limiting frame is arranged, so that the battery cell group is mounted in the accommodating space of the limiting frame for limiting, and the movable parts connected with the battery cell group are driven to be close to or far away from each other by utilizing the adjusting assembly, so that the moving distance of the movable parts close to or far away from each other can be adjusted according to the actual size of the battery cell group; therefore, accurate pre-tightening force is applied, the universality is high, and the cycle life of the battery is effectively prolonged.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell group limiting structure, a battery module and a battery pack. Background Art

[0002] A battery module is composed of multiple cells, which provide power to electrical devices through continuous discharge. During the charge and discharge cycle, cells often expand, which can harm both the cells and the battery module, affecting their performance and service life.

[0003] In related technologies, battery modules usually confine battery cells to a fixed position, for example, by connecting side panels and end panels to form a frame structure to accommodate the battery cells, thereby providing a certain pre-tightening force and thereby limiting the expansion of the battery cells.

[0004] Since the sizes of battery cells in different batches may be different, the frame structure needs to leave a floating space for pre-tightening force, which results in different pre-tightening forces of battery cells in different batches and large differences in cycle life. Utility Model Content

[0005] The embodiments of the present application provide a battery cell group limiting structure, a battery module and a battery pack to solve the problem that different batches of battery cells have different sizes, the pre-tightening force provided by the conventional frame is inaccurate, and the cycle life of different batches of battery cells varies greatly.

[0006] In a first aspect, an embodiment of the present application provides a cell group limiting structure, comprising: a limiting frame, the limiting frame having an accommodating space for accommodating the cell group; an adjustment mechanism, the adjustment mechanism comprising a fixing component and an adjustment component, the fixing component comprising a fixing seat and at least two movable parts respectively connected to opposite sides of the fixing seat, the fixing seat being arranged on the limiting frame, and the movable parts being used to face the cell group; the adjustment component being used to drive the movable parts to move closer to or away from each other to adjust the pre-tightening force of the movable parts relative to the cell group.

[0007] In some possible embodiments, the adjustment assembly includes a rotating member and a connecting member, the connecting member is arranged on one of the movable members, and the other movable member on the opposite side is rotatably connected to the rotating member, and the two ends of the rotating member are respectively connected to the connecting member and the movable member, and the rotating member rotates relative to the connecting member and the movable member to adjust the movable members to move closer to or away from each other.

[0008] In some possible embodiments, the connecting member is a screw with an external thread, the movable member and the rotating member are fixed-torsion nut, and the fixed-torsion nut is threadedly matched with the screw; the fixed-torsion nut includes a fixed-torsion nut body threadedly connected to the screw and a flange connected to the end of the fixed-torsion nut body, the flange is connected to the movable member through a gasket, and a recess is formed on the side of the gasket facing the flange, an internal thread is formed in the recess in the opposite direction of rotation of the external thread, and the flange is threadedly connected to the recess.

[0009] In some possible embodiments, the adjustment assembly further includes a nut, the nut is threadedly connected to the screw, and the nut is fitted to the other end of the fixed-torque nut body.

[0010] In some possible embodiments, a guide assembly is further included, which is arranged on two adjacent sides of the adjustment assembly. The guide assembly includes a first guide member and a second guide member. The extension direction of the first guide member is consistent with the movement direction of the movable member. The first guide member is connected to at least one of the movable members. The first guide member extends toward the fixed seat and is inserted into the second guide member.

[0011] In some possible embodiments, an adjustment hole is opened on the fixing seat, and the adjustment hole is connected to the rotating member.

[0012] In some possible embodiments, grooves for installing the movable part are formed on both sides of the fixed seat, the movable part moves relative to the fixed seat, and an accommodating cavity is formed between the movable part and the inner wall of the groove. A glue injection hole is opened on the fixed seat, and the glue injection hole is connected to the accommodating cavity.

[0013] In some possible embodiments, the limiting frame includes a base plate and an outer frame connected to the base plate, the fixing seat is fixedly connected to the base plate by locking bolts, and mounting beams are provided on both sides of the fixing seat along the second direction, and the mounting beams are connected to the outer frame by bolts.

[0014] In a second aspect, an embodiment of the present application provides a battery module, comprising a plurality of battery cell groups and the above-mentioned battery cell group limiting structure for fixing the battery cell groups.

[0015] In a third aspect, an embodiment of the present application provides a battery pack comprising a plurality of battery modules as described above.

[0016] The embodiments of the present application provide a cell group limiting structure, a battery module, and a battery pack. The cell group limiting structure sets a limiting frame so that the cell group can be installed in the accommodating space of the limiting frame for limiting. At the same time, the fixing seat is connected to the limiting frame so that the movable parts can be oriented toward the cell group, and the adjusting components in the adjustment mechanism drive the movable parts connected to the cell to move closer to or away from each other, thereby being able to adjust the moving distance of the movable parts to move closer to or away from each other according to the actual size of the cell group, so as to apply precise pre-tightening force according to the actual size of the cell group. It has strong versatility and effectively improves the battery cycle life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] Figure 1 An exploded view of the adjustment mechanism in the cell group limiting structure provided in this application;

[0019] Figure 2 for Figure 1 A cross-sectional view of the adjustment mechanism provided in;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure of the fixed component provided in;

[0021] Figure 4 A schematic diagram of the structure of the battery module provided in this application;

[0022] Figure 5 for Figure 4 A cross-sectional view of the battery module is provided in FIG.

[0023] Description of reference numerals:

[0024] 100-limiting frame; 110-base plate; 120-outer frame; 200-fixing assembly; 210-fixing seat; 211-adjusting hole; 212-groove; 213-glue injection hole; 214-mounting beam; 220-movable part; 300-adjusting assembly; 310-rotating part; 311-torque nut body; 312-flange; 320-connecting part; 330-nut; 400-gasket; 500-guide assembly; 510-first guide part; 520-second guide part; 600-locking bolt; 700-battery cell group.

[0025] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0026] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0027] The terms "first," "second," "third," and so on (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the application described herein can be implemented in orders other than those illustrated or described herein.

[0028] Secondly, it should be noted that in the description of this application, terms such as "inside", "outside", "first direction", "second direction", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application.

[0029] In addition, it should be noted that, in the description of this application, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, or integral connection; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0030] As described in the background, battery modules typically confine cells to a fixed position, for example by connecting side panels and end panels to form a cell-enclosing frame. This provides a certain amount of preload, thereby limiting cell expansion. However, because cell sizes may vary from batch to batch, the frame structure requires a margin for preload fluctuation. This results in varying preload forces and significant variations in cycle life.

[0031] In response to the above-mentioned problems, an embodiment of the present application provides a cell group limiting structure, a battery module and a battery pack. The cell group limiting structure includes a limiting frame and an adjustment mechanism. The limiting frame has an accommodation space for accommodating the cell group. The adjustment mechanism includes a fixing component and an adjustment component. The fixing component includes a fixing seat and at least two movable parts respectively connected to opposite sides of the fixing seat. The fixing seat is set on the existing frame. The movable parts are used to face the cell group; the adjustment component is used to drive the movable parts to move closer to or away from each other to adjust the preload force of the movable parts relative to the cell group. The battery module includes a plurality of cell groups and a cell group limiting structure such as the above-mentioned cell group for fixing the cell groups. The battery pack includes a battery module such as the above-mentioned cell module. In this way, the present application can use the adjustment component to adjust the movable parts to move closer to or away from each other, and then adjust the preload force of the movable parts relative to the cell group, so as to adjust the moving distance of the movable parts according to the size of the cell group, and then adjust the preload force according to actual conditions, thereby improving the life of the cell group.

[0032] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] See also Figures 1 to 5 As shown, in the first aspect, an embodiment of the present application provides a cell group limiting structure, which includes a limiting frame 100 and an adjustment mechanism. Among them, the limiting frame 100 has an accommodating space for accommodating the cell group 700. The adjustment mechanism includes a fixing component 200 and an adjustment component 300, the fixing component 200 includes a fixing seat 210 and at least two movable parts 220 respectively connected to the opposite sides of the fixing seat 210, the fixing seat 210 is arranged on the limiting frame 100, the movable part 220 is used to face the cell group 700, and the adjustment component 300 is used to drive the movable parts 220 to move closer to or away from each other to adjust the pre-tightening force of the movable parts 220 relative to the cell group 700.

[0034] It can be understood that the adjustment mechanism is connected to the limit frame 100, so that the accommodating space of the limit frame 100 can be divided into multiple spaces, and the battery cell group 700 is installed in the space, wherein the adjustment mechanism can adjust the preload force of the battery cell group 700 by moving the movable part 220 in the adjustment mechanism on at least one side of the battery cell group 700 along the first direction within the space to prevent the battery cell group 700 from expanding.

[0035] Specifically, the battery cell group limiting structure is provided with a limiting frame 100 so that the battery cell group 700 is installed in the accommodating space of the limiting frame 100 for limiting, and at the same time, the fixing seat 210 is connected to the limiting frame 100 so that the movable part 220 can be oriented toward the battery cell group 700, and the adjusting component 300 in the adjustment mechanism drives the movable parts 220 connected to the battery cell group 700 to move closer to or away from each other, and then the moving distance of the movable parts 220 to move closer to or away from each other can be adjusted according to the actual size of the battery cell group 700, so as to apply precise pre-tightening force according to the actual size of the battery cell group 700, which has strong versatility and effectively improves the battery cycle life.

[0036] Combine Figure 1 and Figure 2 As shown, on the basis of the above embodiment, the adjustment component 300 further includes a rotating member 310 and a connecting member 320, the connecting member 320 is arranged on one of the movable members 220, and the other movable member 220 on the opposite side is rotatably connected to the rotating member 310, and the two ends of the rotating member 310 are respectively connected to the connecting member 320 and the movable member 220, and the rotating member 310 rotates relative to the connecting member 320 and the movable member 220 to adjust the movable members 220 to move closer to or away from each other.

[0037] Specific, combined Figure 1 and Figure 2 As shown, the connecting member 320 can be connected to one of the movable members 220, the rotating member 310 can be rotatably connected to the movable member 220 on the opposite side, and the two ends of the rotating member 310 can be connected to the connecting member 320 and the movable member 220 respectively. The rotation direction of the connection between the connecting member 320 and the rotating member 310 is opposite to the rotation direction of the connection between the rotating member 310 and the movable member 220. When the preload force of the battery cell group 700 needs to be adjusted, the rotating member 310 can be adjusted to rotate relative to the connecting member 320 and the movable member 220, thereby driving the movable members 220 to move closer to or away from each other, thereby adjusting the preload force.

[0038] Furthermore, if Figure 1 and Figure 2 As shown, the connecting member 320 is a screw with external threads, and the rotating member 310 is a fixed torsion nut.

[0039] Specifically, the connecting member 320 may be a screw with external threads, and the rotating member 310 may be a fixed-torque nut, and the two are threadably matched.

[0040] Continue to combine Figure 1 and Figure 2As shown, the fixed torsion nut includes a fixed torsion nut body 311 threadedly connected to the screw and a flange 312 connected to the end of the fixed torsion nut body 311. The flange 312 is connected to the movable part 220 through a gasket 400. The gasket 400 is formed with a recess on the side facing the flange 312, and an internal thread is formed in the recess in the opposite direction of rotation to the external thread. The flange 312 is threadedly connected in the recess.

[0041] It can be understood that the fixed-torsion nut body 311 has an internal thread and is threadedly connected to the screw. A flange 312 is provided at one end of the fixed-torsion nut body 311. The flange 312 can be connected to the gasket 400, and the gasket 400 fits against the movable part 220 to avoid damaging the surface of the movable part 220. The gasket 400 can be formed with a recess on the side facing the flange 312, and an internal thread is provided in the recess. The thread rotation direction of the internal thread is opposite to the rotation direction of the external thread of the screw. The flange 312 can be threadedly connected to the recess, which not only prevents the movable part 220 from rotating synchronously with the fixed-torsion nut, but also when the fixed-torsion nut is rotated, the movable part 220 respectively connected to the screw and the flange 312 can move under the action of the opposite threads, and thus approach or move away from each other.

[0042] Of course, in other embodiments, the connecting member 320 may also be a guide screw, with both ends passing through the movable parts 220 on both sides, and the connecting member 320 is threadedly connected to the two movable parts 220. The two sides of the connecting member 320 have threads with opposite rotation directions, and the rotating member 310 may be a threaded knob that cooperates with the guide screw. When the rotating member 310 rotates to drive the connecting member 320 to rotate, it is possible to flexibly control the movable parts 220 to move closer or farther away from each other, so as to provide pre-tightening force for the battery cell group 700.

[0043] Further, combined with Figure 1 and Figure 2 As shown, the adjustment assembly 300 further includes a nut 330 , which is threadedly connected to the screw rod, and the nut 330 is attached to the other end of the fixed torque nut body 311 .

[0044] It can be understood that the nut 330 is located between the rotating part 310 and the movable part 220. After the adjustment of the rotating part 310 is completed so that the movable part 220 is in contact with the battery cell group 700, the nut 330 can be tightened to fit the nut 330 with the end of the fixed torque nut body 311 to prevent the rotating part 310 from loosening or sliding.

[0045] Among them, in some possible embodiments, such as Figure 1As shown, the adjustment mechanism also includes a guide assembly 500, which is arranged on two adjacent sides of the adjustment assembly 300. The guide assembly 500 includes a first guide member 510 and a second guide member 520. The extension direction of the first guide member 510 is consistent with the moving direction of the movable member 220. The first guide member 510 is connected to at least one of the movable members 220. The first guide member 510 extends toward the fixed seat 210 and is inserted into the second guide member 520.

[0046] For details, see Figure 1 As shown, the guide assembly 500 is disposed on two adjacent sides of the adjustment assembly 300 to strengthen the overall structure of the fixed assembly 200 and prevent the movable member 220 from shaking or deflecting when the adjustment assembly 300 is in operation. The first guide member 510 can be connected to one of the movable members 220, or to both movable members 220. The extension direction of the first guide member 510 is consistent with the movement direction of the movable member 220, and the first guide member 510 can be inserted into the second guide member 520. When the movable member 220 moves relative to each other, the first guide member 510 can move along the extension direction of the second guide member 520, further enhancing the guiding capability and ensuring the balance of the movable member 220.

[0047] Furthermore, if Figure 1 As shown, the first guide member 510 can be a guide column connected to the movable member 220, and the guide column extends toward the fixed seat 210. The second guide member 520 can be a guide sleeve that is sleeved on the guide column, and the guide column is inserted into the guide sleeve. The guide sleeve is used to fix the guide column and guide the moving direction of the guide column to prevent the movable member 220 from deflecting.

[0048] In some possible embodiments, Figure 1 and Figure 3 As shown, the fixing base 210 is provided with an adjustment hole 211, which is connected to the rotating member 310. It is understood that when the size of the battery cell group 700 varies and the preload force needs to be adjusted, a torque wrench can be passed through the adjustment hole 211 to set the torque of the rotating member 310, so that the rotating member 310 rotates relative to the connecting member 320, thereby adjusting the moving parts 220 to move closer or further away from each other, thereby adjusting the preload force on the battery cell group 700, preventing the battery cell group 700 from expanding, and improving the life of the battery cell group 700.

[0049] Further, combined with Figure 1 and Figure 3 As shown, grooves 212 for installing the movable part 220 are formed on both sides of the fixed base 210. The movable part 220 moves relative to the fixed base 210. An accommodating cavity is formed between the movable part 220 and the inner wall of the groove 212. A glue injection hole 213 is opened on the fixed base 210, and the glue injection hole 213 is connected to the accommodating cavity.

[0050] Specifically, see Figure 1 and Figure 3 As shown, the movable part 220 is installed in the groove 212. When the preload force needs to be adjusted, the movable part 220 can be adjusted to move relative to the fixed seat 210 through the adjustment component 300. After the preload force is adjusted, a receiving cavity is formed between the movable part 220 and the inner wall of the groove 212 of the fixed seat 210. The colloid can be filled into the receiving cavity through the glue injection hole 213 to avoid the movable part 220 from moving during actual use and ensure the overall strength of the fixed assembly 200.

[0051] In some possible embodiments, Figures 1 to 5 As shown, the limiting frame 100 includes a base plate 110 and an outer frame 120 connected to the base plate 110, the fixing seat 210 is fixedly connected to the base plate 110 by locking bolts 600, and the fixing seat 210 is provided with mounting beams 214 on both sides along the second direction, and the mounting beams 214 are connected to the outer frame 120 by bolts.

[0052] Specific, combined Figures 1 to 5 As shown, mounting beams 214 can be provided on both sides of the fixing seat 210 along the second direction, and the mounting beams 214 can be connected to the outer frame 120 in the limit frame 100 by bolts, and a plurality of through holes can be opened on the fixing seat 210, and the locking bolts 600 are passed through the through holes to connect to the bottom plate 110 of the limit frame 100, so that the fixing seat 210 can be fixed in the limit frame 100, and the fixing seat 210 can be used as a cross beam to separate the limit frame 100 into a plurality of accommodating spaces so that the battery cell group 700 can be installed in the accommodating space, and one side of the battery cell group 700 can be connected to the movable part 220 to adjust the preload force.

[0053] Combine Figure 4 and Figure 5 As shown, in a second aspect, an embodiment of the present application provides a battery module, including a plurality of battery cell groups 700 and the above-mentioned battery cell group limiting structure for fixing the battery cell groups.

[0054] For details, see Figure 4 and Figure 5 As shown, the adjustment mechanism can be installed on one side of the cell group 700 arranged along the first direction to flexibly adjust the preload force based on the actual size of the cell group 700. Alternatively, the adjustment mechanism can be installed on both sides of the cell group 700 along the first direction, so that the movement distance of the movable member 220 can be adjusted relative to each other by adjusting the adjustment mechanism on both sides, thereby adjusting the preload force. With this arrangement, when the cell group 700 is installed in the limiting frame 100, the preload force can be adjusted based on the actual size of the cell group 700, ensuring space for expansion of the cell group 700 and improving the life of the cell group 700.

[0055] In a third aspect, an embodiment of the present application provides a battery pack comprising a plurality of battery modules as described above. It is understood that a battery pack is an integral unit assembled from a plurality of battery modules for storing and providing electrical energy.

[0056] Finally, it should be noted that those skilled in the art will readily devise other embodiments of the present invention after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. It is not limited to the precise structure described above and shown in the drawings, and various modifications and variations may be made without departing from the scope of this application. The scope of this application is limited solely by the appended claims.

Claims

1. A cell group limiting structure, characterized in that: include: A limiting frame (100), the limiting frame (100) having an accommodation space for accommodating a battery cell group (700); An adjustment mechanism, comprising a fixing assembly (200) and an adjustment assembly (300), wherein the fixing assembly (200) comprises a fixing seat (210) and at least two movable members (220) respectively connected to opposite sides of the fixing seat (210), wherein the fixing seat (210) is arranged on the limiting frame (100), and the movable members (220) are used to face the battery cell group (700); and the adjustment assembly (300) is used to drive the movable members (220) to move closer to or farther from each other, so as to adjust the preload force of the movable members (220) relative to the battery cell group (700).

2. The battery cell group limiting structure according to claim 1, characterized in that: The adjustment assembly (300) includes a rotating member (310) and a connecting member (320), wherein the connecting member (320) is provided on one of the movable members (220), and the other movable member (220) on the opposite side is rotatably connected to the rotating member (310), and both ends of the rotating member (310) are respectively connected to the connecting member (320) and the movable member (220), and the rotating member (310) rotates relative to the connecting member (320) and the movable member (220) to adjust the movable members (220) to move closer to or farther from each other.

3. The battery cell group limiting structure according to claim 2, characterized in that: The connecting member (320) is a screw having an external thread, and the rotating member (310) is a fixed torsion nut, the fixed torsion nut being matched with the screw thread; The fixed-torsion nut comprises a fixed-torsion nut body (311) threadedly connected to the screw rod and a flange (312) connected to the end of the fixed-torsion nut body (311); the flange (312) is connected to the movable part (220) via a gasket (400); a recess is formed on a side of the gasket (400) facing the flange (312); an internal thread is formed in the recess in a direction opposite to the rotation direction of the external thread; the flange (312) is threadedly connected to the recess.

4. The battery cell group limiting structure according to claim 3, characterized in that: The adjustment assembly (300) further comprises a nut (330), wherein the nut (330) is threadably connected to the screw rod, and the nut (330) is fitted to the other end of the fixed-torque nut body (311).

5. The cell group limiting structure according to any one of claims 1 to 4, characterized in that: The invention also includes a guide assembly (500), wherein the guide assembly (500) is arranged on two adjacent sides of the adjustment assembly (300), and the guide assembly (500) includes a first guide member (510) and a second guide member (520). The extension direction of the first guide member (510) is consistent with the moving direction of the movable member (220). The first guide member (510) is connected to at least one of the movable members (220). The first guide member (510) extends toward the fixed seat (210) and is plugged into the second guide member (520).

6. The cell group limiting structure according to any one of claims 2 to 4, characterized in that: An adjustment hole (211) is provided on the fixing seat (210), and the adjustment hole (211) is connected to the rotating member (310).

7. The battery cell group limiting structure according to claim 6, characterized in that: Grooves (212) for mounting the movable member (220) are formed on both sides of the fixing seat (210). The movable member (220) moves relative to the fixing seat (210). An accommodating cavity is formed between the movable member (220) and the inner wall of the groove (212). A glue injection hole (213) is provided on the fixing seat (210), and the glue injection hole (213) is communicated with the accommodating cavity.

8. The battery cell group limiting structure according to claim 1, characterized in that: The limiting frame (100) includes a base plate (110) and an outer frame (120) connected to the base plate (110); the fixing seat (210) is fixedly connected to the base plate (110) via locking bolts (600); mounting beams (214) are provided on both sides of the fixing seat (210) along the second direction; and the mounting beams (214) are connected to the outer frame (120) via bolts.

9. A battery module, characterized in that: The invention comprises a plurality of battery cell groups (700) and a battery cell group limiting structure according to any one of claims 1 to 8 for fixing the battery cell groups (700).

10. A battery pack, characterized in that: The invention comprises a plurality of battery modules as claimed in claim 9.

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