A battery module

Abstract

The utility model relates to the technical field of battery modules, and discloses a battery module, comprising a top cover, an end plate, a bottom plate, and a battery cell. A rectangular frame is fixedly installed below the top cover, the bottom plate is fixedly installed at the bottom of the rectangular frame, the battery cell is arranged in the rectangular frame, and the end plate is fixedly arranged on the left and right ends of the rectangular frame. Mounting plates are welded to the front and back of the rectangular frame, and corrugated aluminum plates 1 and 2 are welded to the mounting plates. The bending directions of the corrugated aluminum plates 1 and 2 are vertical. The rectangular frame is set as a skeleton to install the top cover, the end plate, the bottom plate and the mounting plate, so as to ensure the strength of the entire battery module shell. The corrugated aluminum plates 1 and 2 are installed by the mounting plate, and the side plate components are composed of the corrugated aluminum plates 1 and 2, which not only have high compressive and tensile strengths, but also do not increase the complexity of installation.

Description

Technical Field

[0001] The utility model relates to the technical field of battery modules, in particular to a battery module. Background Art

[0002] At present, in the new energy lithium battery industry, there are many structural forms of battery modules. The commonly used battery modules are multiple battery cells arranged in sequence and a shell that wraps the battery cells. The shell includes two end plates located at both ends of the battery cell assembly and two side plates located on both sides of the battery cell assembly. During the operation of the battery module, the end plate needs to withstand the expansion force of the battery, and the inner end face of the end plate is subjected to the largest battery expansion force, resulting in the risk of fracture of the inner end face of the end plate at the position of the end plate mounting hole. Therefore, the strength of the end plate will be strengthened in conventional designs. However, when the battery cell expands and the end plate strength is sufficient, the expansion force will be transmitted to the side plate, causing the side plate to be squeezed and fractured. Utility Model Content

[0003] The purpose of the present utility model is to provide a battery module to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a battery module, including a top cover, an end plate, a bottom plate, and a battery cell, a rectangular frame is fixedly installed below the top cover, the bottom plate is fixedly installed at the bottom of the rectangular frame, the battery cell is arranged in the rectangular frame, the end plate is fixedly arranged on the left and right ends of the rectangular frame, mounting plates are welded on the front and back sides of the rectangular frame, corrugated aluminum plate 1 and corrugated aluminum plate 2 are welded on the mounting plates, the bending directions of the corrugated aluminum plate 1 and the corrugated aluminum plate 2 are vertical, and the corrugated aluminum plate 1 and the corrugated aluminum plate 2 are shielded on the front and back sides of the rectangular frame.

[0005] Furthermore, a bus is provided above the battery cell, the bus connects electrodes on a plurality of battery cells, and the bus is electrically connected to a port on an end plate.

[0006] Furthermore, the end plate is thick in the middle and thin at both sides, a cavity is opened inside the end plate, and a protrusion is integrally formed at the front and rear ends of the end plate, and the protrusion is welded to the mounting plate.

[0007] Furthermore, a heat dissipation layer 1 is arranged above the battery core, and a heat dissipation layer 2 is arranged below the battery core. The heat dissipation layer 1 and the heat dissipation layer 2 are both fixedly mounted on a rectangular frame.

[0008] Furthermore, a vent hole 1 is provided on the corrugated aluminum plate 1 and the corrugated aluminum plate 2, and a protective plate is fixedly installed on the outer wall of the mounting plate away from the rectangular frame. The protective plate blocks the corrugated aluminum plate 1, and a gap is left between the protective plate and the corrugated aluminum plate 1.

[0009] Furthermore, a recessed groove is provided on the outer wall of the battery cell, an air cooling channel is fixedly installed on the inner side of the rectangular frame, a partition is connected to the air cooling channel, the partition is inserted into the recessed groove, and a second vent hole is opened on the outer wall of the partition.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. A rectangular frame is set as a skeleton to install the top cover, end plate, bottom plate and mounting plate, which can ensure the strength of the entire battery module shell. The corrugated aluminum plate 1 and the corrugated aluminum plate 2 are installed through the mounting plate, and the corrugated aluminum plate 1 and the corrugated aluminum plate 2 are used to form a side panel assembly, which not only has high compressive and tensile strength, but also does not increase the complexity of installation;

[0012] 2. A partition is set between multiple battery cells so that the air-cooling air flow can blow from the second vent hole to the side of the battery cell, that is, the battery cell in the middle can be cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 Structural diagram of exploded view;

[0015] Figure 3 It is a structural schematic diagram of the installation plate, the first corrugated aluminum plate and the second corrugated aluminum plate of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the rectangular frame and the exploded view of the battery cell of the utility model.

[0017] In the figure: 1. Top cover; 2. End plate; 3. Bottom plate; 4. Battery cell; 5. Bus bar; 6. Protective plate; 7. Heat dissipation layer 1; 8. Rectangular frame; 9. Mounting plate; 10. Corrugated aluminum plate 1; 11. Corrugated aluminum plate 2; 12. Vent 1; 13. Heat dissipation layer 2; 14. Air cooling channel; 15. Recessed groove; 16. Partition; 17. Vent 2. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] See also Figure 1-Figure 4The utility model provides a technical solution: a battery module, including a top cover 1, an end plate 2, a bottom plate 3, and a battery cell 4. A rectangular frame 8 is fixedly installed below the top cover 1, the bottom plate 3 is fixedly installed at the bottom of the rectangular frame 8, the battery cell 4 is arranged in the rectangular frame 8, and the end plate 2 is fixedly arranged on the left and right ends of the rectangular frame 8. The front and back sides of the rectangular frame 8 are welded with mounting plates 9, and the mounting plates 9 are welded with corrugated aluminum plates 10 and 11. The corrugated aluminum plates 10 and 11 are welded to the mounting plates 9. The bending direction on the second plate 11 is vertical, and the corrugated aluminum plate 10 and the second corrugated aluminum plate 11 are shielded on the front and back of the rectangular frame 8. The rectangular frame 8 is set as a skeleton to install the top cover 1, the end plate 2, the bottom plate 3 and the mounting plate 9, which can ensure the strength of the entire battery module shell. The corrugated aluminum plate 10 and the second corrugated aluminum plate 11 are installed through the mounting plate 9, and the corrugated aluminum plate 10 and the second corrugated aluminum plate 11 are used to form a side plate assembly, which not only has high compressive and tensile strength, but also does not increase the complexity of installation;

[0020] A busbar 5 is provided above the battery cell 4, the busbar 5 connects the electrodes on the multiple battery cells 4, and the busbar 5 is electrically connected to the port on the end plate 2, so that the electrodes on the multiple battery cells 4 are connected to the port on the end plate 2, and then connected to the external cables;

[0021] The end plate 2 is thick in the middle and thin on both sides, and a cavity is opened inside the end plate 2 to ensure the compressive strength of the end plate 2 and reduce the weight of the end plate 2. The front and rear ends of the end plate 2 are integrally formed with a convex block, and the convex block is welded to the mounting plate 9 to increase the connection part between the end plate 2 and the mounting plate 9. When the battery cell 4 expands and pushes the end plate 2, the force can be transmitted to the mounting plate 9;

[0022] A heat dissipation layer 1 7 is disposed above the battery cell 4, and a heat dissipation layer 2 13 is disposed below the battery cell 4. The heat dissipation layer 1 7 and the heat dissipation layer 2 13 are both fixedly mounted on the rectangular frame 8, and the heat dissipation layer 1 7 and the heat dissipation layer 2 13 are disposed to dissipate heat from the battery cell 4;

[0023] The corrugated aluminum plate 10 and the corrugated aluminum plate 11 are provided with ventilation holes 12, so that the heat generated by the battery core 4 can be dissipated with the air. A protective plate 6 is fixedly installed on the outer wall of the mounting plate 9 away from the rectangular frame 8. The protective plate 6 is shielded on the corrugated aluminum plate 10, and a gap is left between the protective plate 6 and the corrugated aluminum plate 10, which can not only protect the corrugated aluminum plate 10, but also ensure that air can enter the ventilation hole 12;

[0024] The outer wall of the battery cell 4 is provided with a recessed groove 15, and an air cooling channel 14 is fixedly installed on the inner side of the rectangular frame 8. A partition 16 is connected to the air cooling channel 14, and the partition 16 is inserted into the recessed groove 15. The outer wall of the partition 16 is provided with a second vent hole 17. The partition 16 is arranged between multiple battery cells 4, so that the air cooling air flow can blow from the second vent hole 17 to the side of the battery cell 4, that is, the battery cell 4 located in the middle part can be cooled.

[0025] Working principle: When in use, first install the bottom plate 3 and the mounting plate 9 on the rectangular frame 8, then stack and fix the battery cells 4 in the rectangular frame 8, and then install the end plate 2 and the top cover 1 to install the entire battery module. When the battery cells 4 expand and push the end plate 2, the force on the end plate 2 will be transmitted from the mounting plate 9 to the rectangular frame 8 and the corrugated aluminum plates 10 and 11. The compressive and tensile properties of the corrugated aluminum plates 10 and 11 are utilized to avoid damage to the mounting plates 9, 10, and 11 as side panel components.

[0026] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A battery module, comprising a top cover (1), an end plate (2), a bottom plate (3), and a battery cell (4), characterized in that: A rectangular frame (8) is fixedly mounted below the top cover (1), the bottom plate (3) is fixedly mounted at the bottom of the rectangular frame (8), the battery cell (4) is arranged inside the rectangular frame (8), the end plate (2) is fixedly mounted on the left and right ends of the rectangular frame (8), the front and back sides of the rectangular frame (8) are both welded with mounting plates (9), the mounting plates (9) are welded with corrugated aluminum plates 1 (10) and 2 (11), the bending directions of the corrugated aluminum plates 1 (10) and 2 (11) are vertical, and the corrugated aluminum plates 1 (10) and 2 (11) are shielded on the front and back sides of the rectangular frame (8).

2. A battery module according to claim 1, characterized in that: A busbar (5) is arranged above the battery core (4), the busbar (5) connecting electrodes on a plurality of battery cores (4), and the busbar (5) is electrically connected to a port on the end plate (2).

3. A battery module according to claim 1, characterized in that: The end plate (2) is thick in the middle and thin at both sides, a cavity is provided inside the end plate (2), and a convex block is integrally formed at the front and rear ends of the end plate (2), and the convex block is welded to the mounting plate (9).

4. A battery module according to claim 1, characterized in that: A heat dissipation layer 1 (7) is arranged above the battery core (4), and a heat dissipation layer 2 (13) is arranged below the battery core (4); the heat dissipation layer 1 (7) and the heat dissipation layer 2 (13) are both fixedly mounted on a rectangular frame (8).

5. A battery module according to claim 1, characterized in that: The corrugated aluminum plate 1 (10) and the corrugated aluminum plate 2 (11) are provided with a ventilation hole 1 (12); a protective plate (6) is fixedly installed on the outer wall of the mounting plate (9) away from the rectangular frame (8); the protective plate (6) blocks the corrugated aluminum plate 1 (10), and a gap is left between the protective plate (6) and the corrugated aluminum plate 1 (10).

6. A battery module according to claim 1, characterized in that: The outer wall of the battery cell (4) is provided with a recessed groove (15), the inner side of the rectangular frame (8) is fixedly provided with an air cooling channel (14), the air cooling channel (14) is connected with a partition (16), the partition (16) is inserted into the recessed groove (15), and the outer wall of the partition (16) is provided with a second vent hole (17).

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