An integrated sheet metal end plate of a lithium battery module

Abstract

The utility model relates to lithium battery module technical field especially relates to a kind of integrated sheet metal end plate of lithium battery module, including end plate main body, with the first side and second side of opposite, first side is used to connect battery circuit and carries out heat dissipation to battery module, second side is used to with lithium battery module single side wall surface abutment and its is firm.The utility model has realized through the net-like support formed by vertical first reinforcing rib and second side second reinforcing rib in hollow end plate, and then the impact force received by second side is dispersed;Through hollow structure to form heat dissipation channel, the heat generated when lithium battery module works is exported quickly in combination with aluminum alloy material, and the service life of lithium battery is enhanced;Through circuit connecting block and welding point electric connection, circuit is directly integrated in end plate, and external circuit installation is simplified;Through protruding portion inclined design enhances end plate edge protection, prevent steel band deviation and fall off, guarantee the compactness of abutment between lithium battery monomer, improve the stability of lithium battery module power supply.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery module technology, and in particular to an integrated sheet metal end plate for a lithium battery module. Background Technology

[0002] A lithium battery module consists of multiple lithium battery cells connected in series with positive and negative electrodes. To improve the stability of the battery module and prevent it from shaking relative to the battery box, module end plates and steel strips are usually provided at both ends of the battery cell stacking direction. The stacked battery cells are fixed relative to the battery box by the module end plates and steel strip hoops abutting against the inner wall of the battery box.

[0003] In existing technologies, traditional end plates lack internal reinforcement structures, have poor impact resistance, and are easily deformed due to battery module shaking; end plates are mostly solid structures, which hinder heat conduction, causing heat to accumulate when the battery heats up during operation, accelerating battery aging; the connection between external circuits and battery modules requires additional components, making installation complex and prone to loosening. Utility Model Content

[0004] To overcome the problems of traditional end plates lacking internal reinforcement, having poor impact resistance, and being easily deformed by battery module shaking; end plates are mostly solid structures, which hinder heat conduction, causing heat to accumulate when the battery heats up during operation, accelerating battery aging; and external circuits requiring additional components for connection to the battery module, making installation complex and prone to loosening.

[0005] The technical solution of this utility model is as follows: An integrated sheet metal end plate for a lithium battery module includes an end plate body with a first side and a second side facing away from each other. The first side is used for connecting external battery circuits and for heat dissipation of the battery module, and the second side is used for abutting against one side wall of the lithium battery module to stabilize it.

[0006] Furthermore, the end plate body is made of aluminum alloy, the end plate body is hollow inside and has a first reinforcing rib vertically arranged inside, the end plate body is made into a hollow structure by stamping process, and the first reinforcing rib is vertically welded inside to form a heat dissipation channel.

[0007] Furthermore, the upper end of the end plate body is provided with a guide plate groove, and a guide plate frame is fixedly connected to the guide plate groove. A bent aluminum plate in the middle is sleeved inside the guide plate frame. The guide plate groove is riveted to the guide plate frame. The bent aluminum plate is inserted into the guide plate frame and bent. One end of the plate is welded to the battery cell electrode, and the other end is welded to the welding point.

[0008] Furthermore, a protrusion inclined towards the center is provided at the four edges of the first side, and a groove is provided on the outer side of the protrusion, which cooperates with the steel strip to lock the battery module.

[0009] Furthermore, a circuit connection block is provided at the center of the end plate body, and a welding point is embedded at the upper edge of the end plate body. The circuit connection block and the welding point are electrically connected.

[0010] Furthermore, a first extension is provided at the second periphery, and an oval hole is provided on the first extension. The end of the first extension away from the end plate body abuts against the wall of the battery module block.

[0011] Furthermore, a second reinforcing rib is staggered between the oval hole and the first extension to enhance shear resistance.

[0012] The beneficial effect is that this utility model achieves a mesh support formed by the vertical first reinforcing rib inside the hollow end plate and the second reinforcing rib on the second side, thereby dispersing the impact force received on the second side;

[0013] The first extension engages with the oval hole, facilitating the connection between the multi-directional force-reinforced end plate and the battery module and reducing relative sway.

[0014] The hollow structure forms a heat dissipation channel, and the aluminum alloy material quickly dissipates the heat generated by the lithium battery module during operation, thereby enhancing the service life of the lithium battery.

[0015] The circuit is directly integrated into the end board by electrically connecting the circuit connection block and the solder point, simplifying the installation of external circuits;

[0016] The battery module is locked in place by the groove and the steel strip to prevent displacement.

[0017] The protruding, inclined design enhances the edge protection of the end plate, prevents the steel strip from shifting and falling off, ensures the tightness of the contact between lithium battery cells, and improves the stability of the power supply of the lithium battery module. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0019] Figure 2 This is a partially enlarged schematic diagram of point A in this utility model;

[0020] Figure 3 This is a schematic diagram of the bent aluminum plate of this utility model;

[0021] Figure 4 This is another schematic diagram of the present invention;

[0022] Figure 5 This is a schematic diagram of the second side of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1. End plate body; 2. First side; 3. Second side; 4. First reinforcing rib; 5. Guide plate groove; 6. Guide plate frame; 7. Bending aluminum plate; 8. Protrusion; 9. Groove; 10. Circuit connection block; 11. Welding point; 12. First extension; 13. Oval hole; 14. Second reinforcing rib. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] Please see Figures 1-5 This utility model provides an embodiment: an integrated sheet metal end plate for a lithium battery module, including an end plate body 1, having a first side 2 and a second side 3 facing away from each other. The first side 2 is used for connecting external battery circuits and for heat dissipation of the battery module, and the second side 3 is used for abutting against one side wall of the lithium battery module to stabilize it.

[0026] The end plate body 1 is made of aluminum alloy. The end plate body 1 is hollow inside and has a first reinforcing rib 4 vertically arranged. The end plate body 1 is made into a hollow structure by stamping process. The first reinforcing rib 4 is vertically welded inside. The end plate body 1 forms an array of rectangular heat dissipation channels inside, which increases the heat exchange area between the end plate body 1 and the outside.

[0027] Please see Figures 2-4 In this embodiment, the upper end of the end plate body 1 is provided with a guide plate groove 5, and a guide plate frame 6 is fixedly connected to the guide plate groove 5. A bent aluminum plate 7 is sleeved in the middle of the guide plate frame 6. The guide plate groove 5 is riveted to the guide plate frame 6. The bent aluminum plate 7 is inserted into the guide plate frame 6 and bent. One end of the plate is welded to the lithium battery cell electrode, and the other end is welded to the welding point 11, so that the lithium battery circuit is integrated onto the end plate body 1.

[0028] The first side 2 has a protrusion 8 that slopes towards the center at its four edges. A groove 9 is provided on the outer side of the protrusion 8. The groove 9 cooperates with the steel strip to lock the battery module. The protrusion 8 slopes inward to facilitate the steel strip to be sleeved on the end plate body 1 from the outside. The groove 9 is located in the middle of the lithium battery module. As the tilt angle increases, the steel strip tightens continuously, increasing the inward tightening force on the lithium battery module until it is locked in the corresponding position, ensuring that the steel strip does not easily slip or fall off when the lithium battery module is shaken.

[0029] Please see Figures 3-5 In this embodiment, a circuit connection block 10 is provided at the center of the end plate body 1, and a welding point 11 is embedded at the upper edge of the end plate body 1. The circuit connection block 10 is electrically connected to the welding point 11. The circuit connection block 10 facilitates the connection of external electrical equipment and eliminates complicated wiring operations.

[0030] A first extension 12 is provided at the periphery of the second side 3. An oval hole 13 is provided on the first extension 12. The end of the first extension 12 away from the end plate body 1 abuts against the wall of the battery module block. The extension line of the first extension 12 disperses the shear force longitudinally, and the oval hole 13 is subjected to multi-directional force to transmit the shear force to the second side 3.

[0031] A second reinforcing rib 14 is staggered between the oval hole 13 and the first extension 12, which enhances the shear resistance around the end plate body 1 through staggered distribution.

[0032] During assembly, the lithium battery cells are first stacked, and sheet metal end plates 1 made of aluminum alloy are installed at the outermost two ends. The steel strip passes through the inwardly inclined protrusions 8 and is clamped in the grooves 9 to secure the lithium battery module. The high-energy-density battery module provides integrated power supply. One end of the bent aluminum plate 7 at the top of the end plate 1 is connected to the electrode of the lithium battery cell near the end plate, and the other end of the bent aluminum plate 7 is connected to the welding point 11 at the center of the end plate 1, so that it is connected to the circuit connection block 10, which facilitates the use of external circuits and simplifies circuit installation.

[0033] After assembly, the lithium battery module starts to generate heat due to internal chemical reactions after working for a period of time. The hollow structure inside the end plate body 1 that it contacts forms a heat dissipation channel, which, combined with the aluminum alloy material, quickly dissipates heat. During use, the lithium battery module shakes due to the movement or impact of the electrical equipment. At this time, the lithium battery cells abut against the side walls of the stacked lithium battery cells with the first extension 12, the oval hole 13, and the second reinforcing rib 14 distributed on the second side 3 of the end plate body 1. The first extension 12 disperses the impact force it receives to the sheet metal end plate body 1 in multiple directions through the extension line. The external impact is dispersed by the mesh support formed by the first extension 12, the first reinforcing rib 4, and the second reinforcing rib 14 on the second side 3, so as to avoid damage to the internal structure of the lithium battery due to impact and affect the battery life.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated sheet metal end plate for a lithium battery module, characterized in that, The end plate body (1) includes a first side (2) and a second side (3) facing away from each other. The first side (2) is used for connecting the external lithium battery circuit and for heat dissipation of the battery module. The second side (3) is used to abut against the wall of the lithium battery module to stabilize it. The end plate body (1) is made of aluminum alloy. The end plate body (1) is hollow inside and has a first reinforcing rib (4) arranged vertically. A circuit connection block (10) is provided at the center of the end plate body (1). A welding point (11) is embedded at the upper edge of the end plate body (1). The circuit connection block (10) is electrically connected to the welding point (11). A first extension (12) is provided at the periphery of the second side (3). An oval hole (13) is provided on the first extension (12). The end of the first extension (12) away from the end plate body (1) abuts against the wall of the battery module block. A second reinforcing rib (14) is arranged alternately between the oval hole (13) and the first extension (12).

2. The integrated sheet metal end plate of a lithium battery module according to claim 1, characterized in that, The upper end of the end plate body (1) is provided with a guide plate groove (5), and a guide plate frame (6) is fixedly connected to the guide plate groove (5). The guide plate frame (6) is fitted with a middle bent aluminum plate (7).

3. The integrated sheet metal end plate of a lithium battery module according to claim 1, characterized in that, The first side (2) has a protrusion (8) that slopes towards the center at the four edges, and a groove (9) is provided on the outside of the protrusion (8).

Images