End plate and battery module

Abstract

According to the technical scheme, the end plate is characterized in that the end plate comprises an end plate body, two sets of notches are formed in the two sides of the end plate body in the length direction, a first guide plate, an adjusting plate and a second guide plate are sequentially arranged between the two notches at the same height, and a sliding groove is formed in the middle of the end plate body in the width direction of the end plate body; the adjusting plate is slidably connected into the sliding groove through a reset spring. A driving part is arranged in the middle of the end plate body and used for driving the two adjusting plates to move in the width direction of the end plate body, the end plate can adjust the pre-tightening force between the battery cells, and the situation that the battery cells extrude one another is avoided.

Description

Technical Field

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

[0002] With the popularization of new energy, 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 end plate is an important component distributed at both ends of the battery to support the battery body and connect internally and externally. The existing end plates have the following problems: 1. They have a single function, a bloated structure, and a large volume;

[0003] 2. A tie strap needs to be配合 with the end plate between the battery cells, and it is not easy to make a limiting structure on the end plate, resulting in easy sliding between the tie strap and the battery cells, and the performance of the battery module is unstable.

[0004] 3. 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. Content of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an end plate and a battery module, and the end plate can adjust the pre-tightening force between the battery cells to avoid the situation of mutual extrusion between the battery cells.

[0006] To achieve the above purpose, the utility model provides the following technical solution: An end plate includes an end plate body. On both sides of the end plate body in the length direction, two groups of gaps are provided. Between the two gaps at the same height, a first guide plate, an adjustment plate, and a second guide plate are arranged in sequence. In the middle of the end plate body, a sliding groove is arranged along its width direction. The adjustment plate is slidably connected to the sliding groove through a return spring;

[0007] A driving component is arranged in the middle of the end plate body, and the driving component is used to drive the two adjustment plates to move in the width direction of the end plate body.

[0008] The utility model is further arranged as: Both the first guide plate and the second guide plate are arranged in a "凵" - shaped structure.

[0009] The utility model is further arranged as: Guide plates are arranged on both sides of the end plate body in the length direction, and an arc - shaped guide surface is arranged on the guide plate.

[0010] The utility model is further arranged as: An arc - shaped adjustment surface and a guide inclined surface are arranged on the adjustment plate, and the guide inclined surface is arranged on one side of the arc - shaped adjustment surface.

[0011] The utility model is further configured as follows: the driving component includes a rotating block, a shifting rod and a limiting member; the end plate body is provided with a rotating groove, the rotating block is rotatably connected in the rotating groove, and the limiting member is provided between the rotating block and the rotating groove for limiting the rotation of the rotating block;

[0012] The shifting rod is arranged on the rotating block for being shifted by an operator, and the rotating block is arranged in linkage with the adjusting plate.

[0013] The utility model is further configured as follows: the rotating block, the shifting rod and the limiting member are each provided with two groups, and are respectively used to control the movement of the two adjustment plates;

[0014] The rotating block includes a protrusion, and during the rotation of the rotating block, the protrusion pushes the adjustment plate to move.

[0015] The utility model is further configured as follows: the rotating block, the shifting rod and the limiting member are provided in only one set, and are used to synchronously control the movement of the two adjustment plates;

[0016] The rotating block symmetrically includes two linkage blocks. During the rotation of the rotating block, the linkage blocks push the adjustment plate to move.

[0017] The present invention is further configured as follows: the limiting member includes a limiting bead, a limiting spring and a limiting hole; the limiting holes are arranged on the rotating block and are arranged in a circular pattern in multiple groups; the limiting bead is movably connected to the end plate body through the limiting spring.

[0018] The present invention is further configured as follows: a weight-reducing groove is provided on the end plate body.

[0019] A battery module includes end plates, a battery cell group, and a steel belt. Two groups of end plates are provided and are respectively located on both sides of the battery cell group. The steel belt is used to fix the battery cell group and the end plates.

[0020] In summary, the utility model has the following beneficial effects: the steel belt is bound at the upper and lower notches, and the design of the notches can limit the steel belt, thereby preventing the steel belt from sliding to a limited extent and increasing the working stability of the steel belt.

[0021] And in the initial stage of installation, the adjustment plate can be driven to move by the driving component to change the contact between the adjustment plate 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.

[0022] During use, when the battery cell expands, it will act in the opposite direction on the end plates on both sides. Since the ductility of the steel strip is already at a large state, the force will push the adjustment plate to move, thereby increasing the expansion space of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the three-dimensional structure of the battery module;

[0024] Figure 2 A schematic diagram of the three-dimensional structure of the separated battery module;

[0025] Figure 3 Schematic diagram of the three-dimensional structure of the end plate;

[0026] Figure 4 Schematic diagram of the three-dimensional structure of the adjustment plate;

[0027] Figure 5 Schematic diagram of the three-dimensional structure of the driving component.

[0028] Figure numerals: 1. end plate body; 11. notch; 12. sliding groove; 13. weight-reducing groove; 14. rotating groove; 2. first guide plate; 3. adjustment plate; 31. arc-shaped adjustment surface; 32. guide slope; 4. second guide plate; 5. driving component; 51. rotating block; 511. protrusion; 52. lever; 53. limiting member; 531. limiting bead; 532. limiting hole; 6. guide plate; 61. arc-shaped guide surface; 7. battery cell group; 8. steel belt. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0030] Reference Figures 1 to 5 As shown, to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an end plate, comprising an end plate body 1, two sets of notches 11 are provided on both sides of the end plate body 1 in the longitudinal direction, a first guide plate 2, an adjustment plate 3 and a second guide plate 4 are sequentially provided between the two notches 11 at the same height, a sliding groove 12 is provided in the middle portion of the end plate body 1 along its width direction, and the adjustment plate 3 is slidably connected in the sliding groove 12 via a return spring;

[0031] A driving component 5 is provided in the middle of the end plate body 1 , and the driving component 5 is used to drive the two adjustment plates 3 to move in the width direction of the end plate body 1 .

[0032] In the design of the present invention, the steel belt 8 is bound at the positions of the upper and lower notches 11. The design of the notches 11 can limit the steel belt 8, thereby preventing the steel belt 8 from sliding to a limited extent and increasing the working stability of the steel belt 8.

[0033] And during the initial installation, the adjusting plate 3 can be driven by the driving component 5 to move, changing the contact between the adjusting plate 3 and the steel belt 8, so that the extension degree of the steel belt 8 changes, thereby changing the expansion space of the battery cell and avoiding excessive extrusion.

[0034] During the use process, when the battery cell expands, it will act on the two end plates in the reverse direction. Since the ductility of the steel belt 8 is already in a relatively large state, at this time, it will push the adjusting plate 3 to move under force, thereby increasing the expansion space of the battery cell.

[0035] The steel belt 8 is a PET plastic steel belt 8, and the PET plastic steel belt 8 has a relatively high tensile strength and a certain elongation rate.

[0036] The present utility model is further configured as: both the first guide plate 2 and the second guide plate 4 are arranged in a "U" - shaped structure. The design of this structure can facilitate the bundling of the steel belt 8. The first guide plate 2 and the second guide plate 4 can be integrally arranged with the end plate.

[0037] The present utility model is further configured as: guiding plates 6 are arranged on both sides in the length direction of the end - plate body 1, and arc - shaped guiding surfaces 61 are arranged on the guiding plates 6.

[0038] The design of this structure guides the steel belt 8 to bend and transition, improving the stability of the bundling of the steel belt 8.

[0039] The present utility model is further configured as: the adjusting plate 3 is provided with an arc - shaped adjusting surface 31 and a guiding inclined surface 32, and the guiding inclined surface 32 is arranged on one side of the arc - shaped adjusting surface 31.

[0040] The design of this structure makes it convenient for the guiding inclined surface 32 to be inserted into the gap between the steel belt 8 and the sliding groove 12, and then gradually transition to the arc - shaped adjusting surface 31.

[0041] Combined Figure 3 and Figure 4 As shown, the original height of the adjusting plate 3 is slightly lower than the concave surface height of the first guide plate 2 and the second guide plate 4, having a certain height difference from the concave surface, thus forming a gap for the convenient insertion of the guiding inclined surface 32. When the adjusting plate 3 moves, the arc - shaped adjusting surface 31 moves between the first guide plate 2 and the second guide plate 4, which will push the steel belt 8 to move outward, thereby playing a tightening role, making the expansion space of the battery cell smaller, bundling it tighter and not easily loosening.

[0042] Similarly, when the arc - shaped adjusting surface 31 moves away from the first guide plate 2 and the second guide plate 4, the steel belt 8 will recover, thereby making the expansion space of the battery cell larger and avoiding the extrusion of the battery cell, which affects the performance of the battery cell.

[0043] The utility model is further configured as follows: the driving component 5 includes a rotating block 51, a shifting rod 52 and a limiting member 53; a rotating groove 14 is provided on the end plate body 1; the rotating block 51 is rotatably connected to the rotating groove 14; the limiting member 53 is provided between the rotating block 51 and the rotating groove 14 for limiting the rotation of the rotating block 51;

[0044] The shifting rod 52 is provided on the rotating block 51 for being shifted by an operator. The rotating block 51 is provided in linkage with the adjusting plate 3 .

[0045] With the design of this structure, when the operator turns the lever 52 , the rotating block 51 rotates, which can push the adjustment plate 3 to move, thereby forming a match with the steel belt 8 through the arc-shaped adjustment surface 31 .

[0046] Through the design of the limiting member 53, during the rotation of the rotating block 51, there are multiple gears, which can correspond to different extension degrees of the steel belt 8, and when it rotates to different gears, it can limit the rotation of the rotating block 51.

[0047] Similarly, when the battery cell expands, the rotating block 51 will rotate in the opposite direction, and the operator can know the maximum expansion of the battery cell during the maintenance process.

[0048] The utility model is further configured as follows: two groups of rotating blocks 51, shifting rods 52 and limiting members 53 are provided, and are used to control the movement of the two adjustment plates 3 respectively;

[0049] The rotating block 51 includes a protrusion 511 . When the rotating block 51 rotates, the protrusion 511 pushes the adjustment plate 3 to move.

[0050] The design of this structure can adjust the tightness of a steel belt 8 accordingly when one of the rotating blocks 51 is rotated, so as to adapt to different expansion areas of the battery cell.

[0051] The present invention is further configured such that: only one set of the rotating block 51, the shifting rod 52 and the limiting member 53 is provided, and is used to synchronously control the movement of the two adjustment plates 3;

[0052] The rotating block 51 symmetrically includes two linkage blocks. When the rotating block 51 rotates, the linkage blocks push the adjustment plate 3 to move.

[0053] The design of this structure can drive the adjustment plates 3 on both sides to move synchronously when the rotating block 51 is rotated, thereby achieving a synchronous adjustment effect.

[0054] The present invention is further configured as follows: the limiting member 53 includes a limiting bead 531, a limiting spring and a limiting hole 532. The limiting holes 532 are arranged on the rotating block 51 and are arranged in a circular pattern in multiple groups. The limiting bead 531 is movably connected to the end plate body 1 through the limiting spring.

[0055] The design of this structure is that when the lever 52 is pushed with force, the limiting bead 531 separates from the limiting hole 532. At this time, the protrusion 511 abuts against the adjustment plate 3, thereby pushing the adjustment plate 3 to move and compressing the reset spring. When it moves into place, the limiting bead 531 is stuck in the limiting hole 532 to be fixed.

[0056] When resetting, it is only necessary to reversely push the lever 52 to separate the protrusion 511 from the adjustment plate 3 , and the adjustment plate 3 is reset under the action of the reset spring.

[0057] Alternatively, when the battery cell expands, it will act on the end plates on both sides. At this time, the force between the steel belt 8 and the adjustment plate 3 will be greater than the limiting force between the limiting bead 531 and the limiting hole 532, which can push the adjustment plate 3 and the limiting block to move in the opposite direction.

[0058] The present invention is further configured as follows: a weight-reducing groove 13 is provided on the end plate body 1 to reduce the weight of the end plate.

[0059] A battery module includes end plates, a battery cell group 7, and a steel belt 8. Two groups of end plates are provided and are respectively located on both sides of the battery cell group 7. The steel belt 8 is used to fix the battery cell group 7 and the end plates.

[0060] End plates may be installed on both sides of the battery cell group 7 to facilitate simultaneous adjustment of the steel belt 8 from both sides, thereby increasing the adjustment range of the steel belt 8 .

[0061] The above are only preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An end plate, comprising an end plate body (1), characterized in that: On both sides of the end plate body (1) in the length direction, two groups of gaps (11) are provided. Between the two gaps (11) at the same height, a first guide plate (2), an adjustment plate (3), and a second guide plate (4) are sequentially arranged. In the middle of the end plate body (1) along its width direction, a sliding groove (12) is provided. The adjustment plate (3) is slidably connected to the sliding groove (12) through a return spring; In the middle of the end plate body (1), a driving component (5) is provided. The driving component (5) is used to drive the two adjustment plates (3) to move in the width direction of the end plate body (1).

2. The end plate according to claim 1, wherein: Both the first guide plate (2) and the second guide plate (4) are arranged in a "U" - shaped structure.

3. The end plate according to claim 2, characterized in that: On both sides of the end plate body (1) in the length direction, guide plates (6) are provided. An arc - shaped guide surface (61) is provided on the guide plate (6).

4. The end plate according to claim 1, wherein: An arc - shaped adjustment surface (31) and a guide inclined surface (32) are provided on the adjustment plate (3). The guide inclined surface (32) is arranged on one side of the arc - shaped adjustment surface (31).

5. The end plate according to claim 4, characterized in that: The driving component (5) includes a rotating block (51), a lever (52), and a limiting component (53). A rotating groove (14) is provided on the end plate body (1). The rotating block (51) is rotatably connected to the rotating groove (14). The limiting component (53) is arranged between the rotating block (51) and the rotating groove (14) and is used to limit the rotation of the rotating block (51); The lever (52) is arranged on the rotating block (51) for an operator to拨动. The rotating block (51) is linked with the adjustment plate (3).

6. The end plate according to claim 5, characterized in that: Two groups of the rotating block (51), the lever (52), and the limiting component (53) are provided, and are respectively used to control the movement of the two adjustment plates (3); The rotating block (51) includes a convex block (511). During the rotation of the rotating block (51), the convex block (511) pushes the adjustment plate (3) to move.

7. The end plate according to claim 5, characterized in that: Only one group of the rotating block (51), the lever (52), and the limiting component (53) is provided, and is used to synchronously control the movement of the two adjustment plates (3); The rotating block (51) symmetrically includes two linkage blocks. During the rotation of the rotating block (51), the linkage blocks push the adjustment plate (3) to move.

8. The end plate according to claim 5, characterized in that: The limiting component (53) includes a limiting bead (531), a limiting spring, and a limiting hole (532). The limiting hole (532) is provided on the rotating block (51) and is arranged in a plurality of circumferential arrangements. The limiting bead (531) is movably connected to the end plate body (1) through the limiting spring.

9. The end plate according to claim 1, characterized in that: A weight - reducing groove (13) is provided on the end plate body (1).

10. A battery module, characterized by: It includes the end plate according to any one of claims 1 to 9, a battery cell group (7), and a steel strip (8). Two groups of end plates are provided and are respectively located on both sides of the battery cell group (7). The steel strip (8) is used to fix the battery cell group (7) and the end plate.

Images