A battery module end plate structure

Abstract

This utility model provides a battery module end plate structure, including: a cell body, a pressure strip, two end plate bodies, and several plastic steel strips; one end plate body is disposed on one side of the cell body, and the other end plate body is disposed on the other side of the cell body; one end of the pressure strip is connected to one end plate body, and the other end is connected to the other end plate body; each plastic steel strip is sleeved on the outside of the cell body and the two end plate bodies. Using this battery module end plate structure, through the cooperative installation of the cell body, pressure strip, two end plate bodies, and several plastic steel strips, the end plate body's resistance to cell expansion force can be significantly improved, increasing the safety of the entire battery module. Furthermore, the connection with the plastic steel strips also ensures the locking and fixing of the plastic steel strips, resulting in good versatility of the end plate body and providing excellent positioning, thus improving overall production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery module end plate structure. Background Technology

[0002] As the cost of lithium batteries decreases, the application of energy storage battery systems is further increasing. Energy storage battery modules, as an important component of energy storage systems, are becoming increasingly important, and the square battery module endplate, as part of the battery module, plays a crucial role in protecting the safety of the battery module.

[0003] Currently, traditional square battery module end plates mainly adopt single-piece sheet metal bending structures, aluminum extrusion structures, and die-cast aluminum end plate structures. Single-piece sheet metal bending structures are thin, have low strength, and poor reliability; aluminum extrusion end plate molds are expensive and often require multiple machining operations to process lifting holes, module terminal fixing square holes, etc., which is not conducive to cost reduction and mass production; die-cast aluminum end plate structures have the disadvantage of requiring sophisticated mold equipment and incurring high mold costs. Furthermore, current battery modules, when placed in the housing, lack positioning, requiring alignment with mounting holes to ensure all module fixing screws are tightened, impacting production efficiency. Utility Model Content

[0004] To solve the above problems, the present invention adopts the following technical solution: a battery module end plate structure, comprising: a cell body, a pressure strip, two end plate bodies and several plastic steel strips;

[0005] One end plate body is disposed on one side of the battery cell body, and another end plate body is disposed on the other side of the battery cell body. One end of the pressure strip is connected to one end plate body, and the other end is connected to the other end plate body.

[0006] Each of the aforementioned plastic steel strips is sleeved on the outside of the battery cell body and the two end plate bodies.

[0007] Furthermore, each of the end plate bodies includes a main board and a reinforcing plate, the reinforcing plate being disposed on one side of the main board.

[0008] Furthermore, a first bent edge, a second bent edge, and a third bent edge are respectively provided on the left and right ends of one side of the motherboard. One side of the first bent edge is provided on one side of the motherboard, and the other side is connected to one side of the second bent edge. The other side of the second bent edge is connected to the third bent edge.

[0009] Furthermore, a fourth bend, a fifth bend, and a sixth bend are respectively provided at the top and bottom ends of one side of the motherboard. One side of the fourth bend is provided on one side of the motherboard, and the other side is connected to one side of the fifth bend. The other side of the fifth bend is connected to the sixth bend.

[0010] Furthermore, a front reinforcing rib is provided on one side of the motherboard, and a side reinforcing rib is provided on each of the first bent edges. The front reinforcing rib and the side reinforcing rib are used to increase the strength of the motherboard.

[0011] Furthermore, each of the second bending edges is provided with a plurality of protrusions, and each of the plastic steel strips is located between two of the protrusions.

[0012] Furthermore, each of the reinforcing plates is provided with a plurality of lifting holes, which are equidistant from each other.

[0013] Furthermore, each of the mainboards and the reinforcing plate are formed by welding.

[0014] Furthermore, a first pressing and positioning pin is provided on the fourth bent edge, which is used to achieve placement and positioning.

[0015] Furthermore, a second rivet positioning pin and a rivet nut are provided on the other fourth bending edge. A positioning hole is opened at each end of the pressure strip. Each second rivet positioning pin is movably inserted into a positioning hole. The two ends of the pressure strip are respectively connected to the end plate body through the rivet nut.

[0016] The beneficial effects of this utility model are as follows: By using this battery module end plate structure, through the cooperation and installation between the cell body, pressure strip, two end plate bodies and several plastic steel strips, the end plate body's ability to resist cell expansion force can be greatly improved, thus increasing the safety of the entire battery module. Furthermore, through the connection with the plastic steel strips, the locking and fixing of the plastic steel strips is also taken into account, making the end plate body more versatile and playing a good positioning role, thereby improving the overall production efficiency. Attached Figure Description

[0017] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of a battery module end plate structure provided in one embodiment;

[0019] Figure 2 A schematic diagram of an end plate body provided in one embodiment;

[0020] Figure 3 Another schematic diagram of the end plate body provided in one embodiment;

[0021] Figure 4 This is another schematic diagram of the end plate body provided in one embodiment. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings of the embodiments. This utility model is not limited to the following specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0023] like Figures 1 to 4 As shown, a battery module end plate structure includes: a cell body 100, a pressure strip 200, two end plate bodies 300, and a plurality of plastic steel strips 400; one end plate body 300 is disposed on one side of the cell body 100, and the other end plate body 300 is disposed on the other side of the cell body 100; one end of the pressure strip 200 is connected to one end plate body 300, and the other end is connected to the other end plate body 300; each plastic steel strip 400 is sleeved on the outside of the cell body 100 and the two end plate bodies 300.

[0024] Specifically, each end plate body 300 includes a main plate 310 and a reinforcing plate 320, with the reinforcing plate 320 disposed on one side of the main plate 310. A first bent edge 311, a second bent edge 312, and a third bent edge 313 are respectively disposed at the left and right ends of one side of the main plate 310. One side of the first bent edge 311 is disposed on one side of the main plate 310, and the other side is connected to one side of the second bent edge 312. The other side of the second bent edge 312 is connected to the third bent edge 313. A fourth bent edge 314, a fifth bent edge 315, and a sixth bent edge 316 are respectively disposed at the top and bottom ends of one side of the main plate 310. One side of the fourth bent edge 314 is disposed on one side of the main plate 310, and the other side is connected to one side of the fifth bent edge 315. The other side of the fifth bent edge 315 is connected to the sixth bent edge 316. The motherboard 310 has a front reinforcing rib 500 on one side and a side reinforcing rib 600 on each of the first bending edges 311. The front reinforcing rib 500 and the side reinforcing rib 600 are used to increase the strength of the motherboard 310.

[0025] In the above embodiments, each of the second bending edges 312 is provided with a plurality of protrusions 700, and each of the plastic steel strips 400 is located between two of the protrusions 700. Each of the reinforcing plates 320 is provided with a plurality of lifting holes 321, which are equidistant from each other. Each of the main plates 310 and the reinforcing plates 320 are welded together. A first pressing and positioning pin 800 is provided on one of the fourth bending edges 314, which is used for placement and positioning. A second pressing and positioning pin 910 and a pressing nut 920 are provided on the other of the fourth bending edges 314. A positioning hole is provided at each end of the pressure strip 200, and each of the second pressing and positioning pins 910 is movably inserted into a positioning hole. The two ends of the pressure strip 200 are respectively connected to the end plate body 300 through the pressing nut 920.

[0026] In other words, the motherboard 310 has a symmetrical shape, and the connection between the first bent edge 311 and the second bent edge 312 forms a rounded corner. This rounded corner fits and contacts the plastic steel strip 400 fitted on the outside, thus ensuring a more stable fit for the outer plastic steel strip 400. Furthermore, the first bent edge 311, the second bent edge 312, and the third bent edge 313 form a through-hole area, which is used for bolts to pass through and fix the entire motherboard 310. It is worth mentioning that by setting the first bent edge 311, the second bent edge 312, and the third bent edge 313 on the left and right sides respectively, and the fourth bent edge 314, the fifth bent edge 315, and the sixth bent edge 316 on the top and bottom sides respectively, the entire motherboard 310 forms a highly rigid U-shaped structure. Furthermore, by setting the front reinforcing rib 500 and the side reinforcing rib 600, the strength of the motherboard 310 is significantly increased.

[0027] Furthermore, by setting protrusions 700, and with the plastic steel strip 400 located between two protrusions 700, the spacing between the two protrusions 700 is set according to the width of the plastic steel strip 400, and the number of protrusions 700 matches the number of plastic steel strips 400, meaning that one plastic steel strip 400 requires two protrusions 700 to constrain it. It is worth mentioning that both the main board 310 and the reinforcing plate 320 are made of metal, which can be galvanized sheet or cold-rolled sheet, or other metal plates commonly used in existing technologies. These will not be described in detail in this embodiment. The main board 310 and the reinforcing plate 320 are assembled by welding, which significantly improves the resistance of the entire end plate body 300 to cell expansion, avoiding any impact on battery safety due to deformation.

[0028] In the above embodiments, the placement and positioning can be well achieved because the first rivet positioning pin 800 is provided.

[0029] In summary, the above embodiments are not limiting embodiments of this utility model. Any modifications or equivalent variations made by those skilled in the art based on the substantive content of this utility model are within the technical scope of this utility model.

Claims

1. A battery module end plate structure, characterized in that, include: The battery cell body, pressure strip, two end plates, and several plastic steel strips; One end plate body is disposed on one side of the battery cell body, and another end plate body is disposed on the other side of the battery cell body. One end of the pressure strip is connected to one end plate body, and the other end is connected to the other end plate body. Each of the aforementioned plastic steel strips is sleeved on the outside of the battery cell body and the two end plate bodies.

2. The battery module end plate structure according to claim 1, characterized in that: Each of the end plate bodies includes a main board and a reinforcing plate, the reinforcing plate being disposed on one side of the main board.

3. The battery module end plate structure according to claim 2, characterized in that: The motherboard has a first bent edge, a second bent edge, and a third bent edge on its left and right sides respectively. One side of the first bent edge is located on one side of the motherboard, and the other side is connected to one side of the second bent edge. The other side of the second bent edge is connected to the third bent edge.

4. The battery module end plate structure according to claim 3, characterized in that: The motherboard has a fourth bend, a fifth bend, and a sixth bend on its upper and lower ends. One side of the fourth bend is located on one side of the motherboard, and the other side is connected to one side of the fifth bend. The other side of the fifth bend is connected to the sixth bend.

5. The battery module end plate structure according to claim 4, characterized in that: A front reinforcing rib is provided on one side of the motherboard, and a side reinforcing rib is provided on each of the first bending edges. The front reinforcing rib and the side reinforcing rib are used to increase the strength of the motherboard.

6. The battery module end plate structure according to claim 5, characterized in that: Each of the second bends is provided with a plurality of protrusions, and each of the plastic steel strips is located between two of the protrusions.

7. The battery module end plate structure according to claim 6, characterized in that: Each of the reinforcing plates has a plurality of lifting holes, which are equidistant from each other.

8. The battery module end plate structure according to claim 7, characterized in that: Each of the mainboards and the reinforcing plate are formed by welding.

9. The battery module end plate structure according to claim 4, characterized in that: A first pressing and positioning pin is provided on the fourth bent edge, and the first pressing and positioning pin is used to realize placement and positioning.

10. The battery module end plate structure according to claim 9, characterized in that: Another fourth bending edge is provided with a second press-fit positioning pin and a press-fit nut. A positioning hole is opened at both ends of the pressing strip. Each second press-fit positioning pin is movably inserted into a positioning hole. Both ends of the pressing strip are connected to the end plate body through the press-fit nut.

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