Steel belt and battery module

Abstract

According to the technical scheme, the steel belt is characterized by comprising a steel belt body, a connecting hole is formed in one end of the steel belt body, a connecting block is arranged at the other end of the steel belt body, and a rectangular steel belt frame is formed after the two ends of the steel belt body are connected; the steel belt frame comprises a limiting edge abutting against the end plate, the middle part of the inner side of the limiting edge is provided with an abutting part and two groups of guide parts, the guide parts are symmetrically arranged on the two sides of the abutting part, and the steel belt can be conveniently adjusted, so that mutual extrusion of the battery cells is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a steel strip and a battery module. Background Art

[0002] With the promotion of new energy by the country, the lithium battery industry has developed rapidly. The application of lithium batteries is becoming more and more extensive, and the production technology of lithium batteries is also becoming increasingly perfect. The existing battery module is bundled by a steel strip after end plates are installed at both ends of the battery cell group.

[0003] However, the following situation exists during the operation: affected by various factors, the battery cells may expand. The existing operation method is to add a buffer foam between two battery cells. When the battery cells expand, the expansion force is reduced by squeezing the foam. When the expansion is too serious, the effect of the foam is reduced, and the battery cells will squeeze each other.

[0004] For the battery module connected by a tie strap, such as the end plate structure and the battery module in the prior art, with the publication number of CN220604816U, an adjustable structure is designed on the end plate to realize the adjustment of the tightness of the tie strap, so as to play a role in adjusting the expansion space between the battery cells.

[0005] Currently, in order to improve the binding stability, a steel strip is usually used as the binding material. The PET steel strip has a high tensile strength and a certain elongation rate. Since its surface and edge are relatively smooth, although it is convenient for bundling and unpacking, it is not convenient for cooperative adjustment, resulting in cumbersome adjustment. Summary of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a steel strip and a battery module, and the steel strip can be conveniently adjusted to avoid mutual extrusion of the battery cells.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A steel strip includes a steel strip body. One end of the steel strip body is provided with a connection hole, and the other end is provided with a connection block. After the two ends of the steel strip body are connected, a steel strip frame arranged in a rectangle is formed;

[0008] The steel strip frame includes a limiting edge abutting against the end plate. In the middle of the inner side of the limiting edge, an abutting part and a guiding part are provided. There are two groups of guiding parts, and they are symmetrically arranged on both sides of the abutting part.

[0009] The utility model is further arranged as: The guiding part includes guiding surfaces arranged on both sides of the abutting part. One end of the guiding surface is connected to the abutting part, and the other end is flush with the outer edge of the limiting edge.

[0010] The present invention is further configured as follows: notches are provided on both sides of the limiting edge located at the abutting portion, and the guide portion can be detachably mounted at the notches.

[0011] The utility model is further configured as follows: the guide portion includes a rubber block, and a groove is provided on a side of the rubber block away from the abutting portion.

[0012] The utility model is further configured as follows: the guide portion further includes a connecting plate, two groups of the connecting plates are provided, and are respectively connected to both sides of the rubber block, and mounting holes are provided on the connecting plates and the limiting edges.

[0013] A battery module includes a steel strip, an end plate, and a battery cell group. Two groups of end plates are provided and are respectively located on both sides of the battery cell group. Two groups of steel strips are provided and are respectively bundled at different heights of the end plates.

[0014] The utility model is further configured as follows: a sliding groove and an adjusting plate are provided in the middle of the end plate; the adjusting plate slides in the sliding groove through a return spring; and the adjusting plate is arranged in linkage with the abutting portion and the guide portion.

[0015] The utility model is further configured as follows: the adjustment plate has an arc-shaped adjustment surface and a guide inclined surface, and the guide inclined surface is arranged on one side of the arc-shaped adjustment surface.

[0016] The utility model is further configured as follows: a driving component for driving the adjustment plate to move is provided on the end plate.

[0017] To sum up, the utility model has the following beneficial effects: through the design of the guide part, the adjustment plate can be conveniently moved to the abutment area through the guide part during the movement of the end plate, playing a role in guiding the transition, avoiding the adjustment plate from getting stuck during the movement, causing the adjustment plate to abut against the steel belt body during the adjustment process, resulting in jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the three-dimensional structure of the battery module;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the steel belt frame and the guide part;

[0020] Figure 3 Schematic diagram of the three-dimensional structure of the steel belt frame;

[0021] Figure 4 Schematic diagram of the three-dimensional structure of the guide part;

[0022] Figure 5 Schematic diagram of the three-dimensional structure of the end plate.

[0023] Reference signs: 1, steel strip frame; 2, limiting edge; 21, notch; 3, abutting portion; 4, guiding portion; 41, rubber block; 411, slotted groove; 42, connecting plate; 421, mounting hole; 5, end plate; 51, sliding groove; 52, adjusting plate; 521, arc-shaped adjusting surface; 522, guiding inclined surface; 53, driving component; 6, battery cell group. Detailed implementation manners

[0024] The present utility model will be further described in detail below in conjunction with the drawings and embodiments. The same components are denoted by the same reference signs. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component respectively.

[0025] Refer to Figures 1 to 5 As shown, to achieve the above object, the present utility model provides the following technical solution: A steel strip includes a steel strip body, a connection hole is provided at one end of the steel strip body, and a connection block is provided at the other end. After the two ends of the steel strip body are connected, a rectangular steel strip frame 1 is formed.

[0026] The steel strip frame 1 includes a limiting edge 2 abutting against the end plate 5. An abutting portion 3 and a guiding portion 4 are provided in the middle of the inner side of the limiting edge 2. There are two groups of guiding portions 4, and they are symmetrically arranged on both sides of the abutting portion 3.

[0027] In the design of the present utility model, through the design of the guiding portion 4, it is convenient for the adjusting plate 52 to move to the area of the abutting portion 3 through the guiding portion 4 during the movement on the end plate 5, playing a role of guiding and transitioning, and avoiding the adjusting plate 52 from being stuck during the movement, resulting in the situation that the adjusting plate 52 abuts against the steel strip body during the adjustment process, thus causing jamming.

[0028] The present utility model is further provided as: The guiding portion 4 includes guiding surfaces provided on both sides of the abutting portion 3. One end of the guiding surface is connected to the abutting portion 3, and the other end is flush with the outer edge of the limiting edge 2. With the design of this structure, the side of the guiding surface close to the abutting portion 3 is higher than the side of the guiding surface away from the abutting portion 3, so that gaps can be formed between both sides of the limiting edge 2 and the end plate 5, facilitating the insertion of the adjusting plate 52.

[0029] The present utility model is further provided as: Notches 21 are provided on both sides of the limiting edge 2 located at the abutting portion 3, and the guiding portion 4 is detachably installed at the notches 21. With the design of this structure, different usage situations can be adapted by replacing the guiding portion 4.

[0030] The present invention is further configured such that the guide portion 4 includes a rubber block 41, and a groove 411 is provided on the side of the rubber block 41 away from the abutment portion 3. With the design of the rubber block 41, the rubber block 41 can be deformed during the pushing process of the adjustment plate 52, thereby facilitating the insertion of the adjustment plate 52 into the guide portion 4.

[0031] The present invention is further configured as follows: the guide portion 4 further includes a connecting plate 42, two sets of connecting plates 42 are provided, and are respectively connected to both sides of the rubber block 41, and mounting holes 421 are opened on the connecting plates 42 and the limiting edge 2. This structural design facilitates the disassembly and replacement of the guide portion 4.

[0032] A battery module includes a steel belt, an end plate 5, and a cell group 6. Two sets of end plates 5 are provided, one on each side of the cell group 6, and two sets of steel belts are provided, each bundled at different heights on the end plates 5. End plates 5 can be installed on both sides of the cell group 6 to facilitate simultaneous adjustment of the steel belts from both sides, increasing the adjustment range of the steel belts.

[0033] The present invention is further configured as follows: a sliding groove 51 and an adjusting plate 52 are provided in the middle of the end plate 5 ; the adjusting plate 52 slides in the sliding groove 51 through a return spring; and the adjusting plate 52 is arranged in linkage with the abutting portion 3 and the guide portion 4 .

[0034] The present invention is further configured as follows: an arc-shaped adjustment surface 521 and a guide inclined surface 522 are provided on the adjustment plate 52 , and the guide inclined surface 522 is provided on one side of the arc-shaped adjustment surface 521 .

[0035] With this structural design, the guiding inclined surface 522 can be easily inserted into the gap between the steel belt and the sliding groove 51 , thereby gradually transitioning to the arc-shaped adjustment surface 521 .

[0036] like Figure 5 As shown, when the adjustment plate 52 moves, the arc-shaped adjustment surface 521 moves to the adjustment area, which pushes the steel belt to move outward, thereby playing a tightening role, making the expansion space of the battery cell smaller, binding tighter, and not easy to loosen.

[0037] Similarly, when the arc-shaped adjustment surface 521 moves away from the adjustment area, the steel belt will recover, thereby increasing the expansion space of the battery cell and preventing the battery cell from being squeezed and affecting the battery cell performance.

[0038] The present invention is further configured as follows: a driving component 53 for driving the adjustment plate 52 to move is provided on the end plate 5 .

[0039] In the initial stage of installation, the driving component 53 can be used to drive the adjustment plate 52 to move, changing the contact between the adjustment plate 52 and the steel belt, so that the extension degree of the steel belt changes, thereby changing the expansion space of the battery cell and avoiding excessive extrusion.

[0040] During use, when the battery cell expands, it will act on the two end plates 5 in the reverse direction. Since the ductility of the steel strip is already in a relatively large state, the adjusting plate 52 will be pushed to move under the force at this time, thereby increasing the expansion space of the battery cell.

[0041] The driving component 53 can be a rotating block, a lever, and a limiting component. A rotating groove is provided on the main body of the end plate 5. The rotating block is rotatably connected in the rotating groove. The limiting component is arranged between the rotating block and the rotating groove for restricting the rotation of the rotating block.

[0042] The lever is arranged on the rotating block for an operator to toggle. The rotating block and the adjusting plate 52 are linked.

[0043] With this structural design, when the operator toggles the lever, the rotating block rotates. At this time, it can push the adjusting plate 52 to move, so as to form a cooperation with the steel strip through the arc-shaped adjusting surface 521.

[0044] Through the design of the limiting component, during the rotation of the rotating block, there are multiple gears, which can correspond to different ductility degrees of the steel strip, and when it rotates to different gears, it can play a role in restricting the rotation of the rotating block.

[0045] Similarly, when the battery cell expands, it will cause the rotating block to rotate in the reverse direction. During the maintenance process, the operator can know the maximum expansion condition of the battery cell.

[0046] The present utility model is further configured as: only one set of the rotating block, the lever, and the limiting component is provided, and it is used to synchronously control the movement of the two adjusting plates 52;

[0047] The rotating block symmetrically includes two linkage blocks. During the rotation of the rotating block, the linkage blocks push the adjusting plate 52 to move.

[0048] With this structural design, when the rotating block is rotated, it can drive the two adjusting plates 52 on both sides to move synchronously, playing a role in synchronous adjustment.

[0049] The present utility model is further configured as: the limiting component includes a limiting bead, a limiting spring, and a limiting hole. The limiting hole is provided on the rotating block and is arranged in a plurality of groups in a circumferential arrangement. The limiting bead is movably connected to the main body of the end plate 5 through the limiting spring.

[0050] With this structural design, when the lever is toggled forcefully, the limiting bead is separated from the limiting hole. At this time, the convex block abuts against the adjusting plate 52, thereby pushing the adjusting plate 52 to move and compress the return spring. When the movement is in place, the limiting bead is snapped into the limiting hole to form a fixation.

[0051] When resetting, only need to toggle the lever in the reverse direction to separate the convex block from the adjusting plate 52, and the adjusting plate 52 moves in the reverse direction under the action of the return spring.

[0052] Alternatively, when the battery cell expands, it will act on the end plates 5 on both sides. At this time, the acting force between the steel strip and the adjusting plate 52 will be greater than the limiting force between the limiting beads and the limiting holes, and then it can push the adjusting plate 52 and the limiting block to move in the reverse direction.

[0053] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A steel strip, characterized in that: It includes a steel strip body, with a connection hole provided at one end of the steel strip body and a connection block provided at the other end. After the two ends of the steel strip body are connected, a steel strip frame (1) arranged in a rectangle is formed. The steel strip frame (1) includes a limiting edge (2) that abuts against the end plate (5). In the middle of the inner side of the limiting edge (2), an abutting portion (3) and a guiding portion (4) are provided. There are two groups of the guiding portions (4), and they are symmetrically arranged on both sides of the abutting portion (3).

2. A steel strip according to claim 1, characterized in that: The guiding portion (4) includes guiding surfaces arranged on both sides of the abutting portion (3). One end of the guiding surface is connected to the abutting portion (3), and the other end is flush with the outer edge of the limiting edge (2).

3. A steel strip according to claim 1, characterized in that: Notches (21) are provided on both sides of the limiting edge (2) located at the abutting portion (3), and the guiding portion (4) is detachably installed at the notches (21).

4. A steel strip according to claim 3, characterized in that: The guiding portion (4) includes a rubber block (41), and a slot (411) is provided on the side of the rubber block (41) away from the abutting portion (3).

5. A steel strip according to claim 4, characterized in that: The guiding portion (4) further includes connecting plates (42). There are two groups of the connecting plates (42), and they are respectively connected to both sides of the rubber block (41). Mounting holes (421) are provided on both the connecting plates (42) and the limiting edge (2).

6. A battery module, characterized in that: It includes the steel strip, the end plate (5) and the battery cell group (6) according to any one of claims 1 to 5. There are two groups of the end plates (5), and they are respectively located on both sides of the battery cell group (6). There are two groups of the steel strips, and they are respectively strapped at different heights of the end plates (5).

7. The battery module according to claim 6, characterized in that: A sliding groove (51) and an adjusting plate (52) are provided in the middle of the end plate (5). The adjusting plate (52) slides in the sliding groove (51) through a return spring, and the adjusting plate (52) is arranged in linkage cooperation with the abutting portion (3) and the guiding portion (4).

8. A battery module according to claim 7, characterized in that: An arc-shaped adjusting surface (521) and a guiding inclined surface (522) are provided on the adjusting plate (52). The guiding inclined surface (522) is arranged on one side of the arc-shaped adjusting surface (521).

9. The battery module according to claim 7, wherein: A driving component (53) for driving the adjusting plate (52) to move is provided on the end plate (5).

Images