Battery device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device, which comprises a battery pack and a fixing piece arranged at the end part of the battery stacking direction, and a reinforcing part is arranged on the fixing piece along the middle area far away from the surface of the battery pack. The expansion of the battery pack can be effectively limited, and the fixing reliability of the battery pack is ensured.

Description

Technical Field

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

[0002] Battery packs have significant applications in production and daily life. Battery cells are stacked into a battery pack and then encapsulated in a battery frame. Currently, battery frame end plates are mainly divided into aluminum profile end plates, die-cast aluminum alloy end plates, and injection-molded end plates. Die-cast aluminum alloy end plates have certain advantages in terms of strength, structural strength, and cost. For example, in terms of material strength, die-cast aluminum alloy end plates are stronger than aluminum profile end plates. In terms of strength, aluminum profile end plates, due to manufacturing process factors, generally require a wall thickness of ≥2.0mm, and have a complex cross-sectional design, requiring a certain number of cavities and reinforcing ribs to support the large-area structure and increase strength, thus increasing weight. Under the same strength requirements, die-cast aluminum alloy end plates weigh only 60%-80% of aluminum profile end plates, saving material costs.

[0003] like Figure 1 As shown, the battery pack structure consists of die-cast aluminum alloy end plates 10 with cable ties and a battery pack 30. Bolts pass through the end plates 10 and connect them to the crossbeams of the housing. Cable ties 20 are fastened to the two end plates 10 located at the front and rear ends of the battery pack 30. Considering the installation of the battery pack 30 and the expansion of the cells, the bottom of the end plates 10 has strong bolt constraint, resulting in high rigidity and resistance to deformation during the expansion of the battery pack 30. However, the end plates 10 near the upper middle to shoulder height area of ​​the cells deform more significantly due to their greater distance from the bottom bolt constraint. During expansion, the two end plates 10 exhibit a "flared" or "figure-eight" shape.

[0004] Therefore, a battery device is needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a battery device that can effectively limit the expansion of the battery pack and ensure the reliability of the battery pack fixation.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A battery device includes a battery pack and a fastener disposed at one end in the battery stacking direction, the fastener having a reinforcing portion disposed in a central region away from the surface of the battery pack.

[0008] The beneficial effects of this utility model are:

[0009] This utility model provides a battery device including a battery pack and a fixing member disposed at the end in the battery stacking direction. The fixing member has a reinforcing portion in the central region away from the surface of the battery pack. By providing a reinforcing portion on the fixing member, the fixing member can be locally strengthened, improving its resistance to deformation, effectively restraining the expansion deformation of the battery pack, and ensuring the reliability of fixing the battery pack. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of a battery device in the prior art;

[0012] Figure 2 This is a schematic diagram of a battery device according to the present invention;

[0013] Figure 3 This is a schematic diagram of another battery device according to the present invention.

[0014] In the picture:

[0015] 10. End plate; 20. Cable tie; 30. Battery pack; 1. Fixing component; 11. Weight reduction groove; 2. Reinforcing part; 3. Strengthening part. Detailed Implementation

[0016] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0017] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0018] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0019] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0020] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0021] In the process of manufacturing battery devices, in order to effectively limit the expansion of the battery pack and ensure the reliability of the battery pack's fixation, such as... Figures 2-3 As shown, this utility model provides a battery device. The battery device includes a battery pack 30 and a fixing member 1 disposed at the end in the battery stacking direction. The fixing member 1 has a reinforcing part 3 fixedly disposed in the central region along the surface away from the battery pack 30. Specifically, the central region where the fixing member 1 has the reinforcing part 3 is located in the middle of the horizontal direction perpendicular to the battery stacking direction, such as... Figure 2 The X direction is shown in the diagram.

[0022] By providing a reinforcing part 3 on the fixing part 1, the fixing part 1 can be locally strengthened, the fixing part 1's ability to resist deformation can be improved, the expansion deformation of the battery pack 30 can be effectively constrained, and the reliability of fixing the battery pack 30 can be guaranteed.

[0023] In some embodiments, the ratio of the area of ​​the reinforcing part 3 to the area of ​​the fastener 1 ranges from 1 / 3 to 1 / 2. Exemplarily, the ratio of the area of ​​the reinforcing part 3 to the area of ​​the fastener 1 can be 1 / 3, 3 / 7, or 1 / 2. By limiting the area covered by the reinforcing part 3, localized and focused reinforcement can be applied to areas of the fastener 1 subjected to greater stress, thereby ensuring the strength of the fastener 1 and saving material usage.

[0024] like Figure 3 As shown, in some embodiments, the reinforcing part 3 is disposed in the upper middle part of the fixing member 1. By further reinforcing the upper middle part of the fixing member 1, the deformation of the upper middle part of the fixing member 1 after being subjected to force is reduced, thereby effectively constraining the expansion deformation of the battery pack 30 and ensuring the reliability of the fixing member 1 in fixing the battery pack 30.

[0025] In some embodiments, the ratio of the height of the reinforcing part 3 to the height of the fixing member 1 ranges from 1 / 4 to 1 / 2. Exemplarily, the ratio can be 1 / 3, 2 / 5, or 1 / 2. Since the fixing member 1 protrudes relative to the reinforcing part 3, it affects the volume of the assembled battery device to some extent, increasing its space occupation. By limiting the ratio of the height of the reinforcing part 3 to the height of the fixing member 1, it is possible to locally reinforce the fixing member 1 while reducing the volume of the fixing member 1 with the reinforcing part 3, thereby reducing the space occupied by the assembled battery device.

[0026] like Figure 3 As shown, in some embodiments, the fastener 1 has a reinforcing portion 2 along the surface away from the battery pack 30. Both the reinforcing portion 3 and the reinforcing portion 2 are mesh-like reinforcing ribs, and the mesh density of the reinforcing portion 3 is 2-4 times that of the reinforcing portion 2. Specifically, in this embodiment, the fastener 1 is made using a die-casting aluminum process, which allows the reinforcing portion 2 and the reinforcing portion 3 to be integrally formed on the fastener 1, facilitating manufacturing while ensuring the strength of the fastener 1. By increasing the mesh density of the reinforcing portion 3, the strength of the upper part of the fastener 1 can be improved, thereby providing localized reinforcement to the upper part of the fastener 1, which is prone to deformation under greater stress. This effectively limits the expansion of the upper part of the battery pack 30, ensuring the stability of the battery device. Furthermore, the high-density reinforcing portion 3 can be integrally formed on the fastener 1 using a die-casting process, facilitating manufacturing. Compared to injection-molded fasteners 1 and aluminum profile fasteners 1, this fastener 1 has higher strength and stronger resistance to expansion and deformation compared to ordinary fastener designs, without significantly increasing costs.

[0027] like Figure 2As shown, in some embodiments, the fastener 1 has a reinforcing portion 2 along the surface away from the battery pack 30, and the thickness of the reinforcing portion 3 along the battery stacking direction is greater than the thickness of the reinforcing portion 2. Specifically, in this embodiment, both the reinforcing portion 3 and the reinforcing portion 2 are mesh-like reinforcing ribs. By designing the thickness of the reinforcing portion 3 to be greater than the thickness of the reinforcing portion 2, the upper middle region of the fastener 1 can be further locally reinforced, ensuring that the middle part of the reinforcing portion 3 has sufficient strength.

[0028] like Figure 2 and Figure 3 As shown, in some embodiments, the battery device further includes cable ties 20, which are clamped onto two fasteners 1 located at the ends of the battery pack 30. Specifically, the cable ties 20 are steel cable ties, which can be used to tightly connect the battery pack 30 and the fasteners 1, thereby making the battery device a tightly connected whole.

[0029] like Figure 2 and Figure 3 As shown, in some embodiments, the projection of the cable tie 20 along the battery stacking direction does not coincide with the reinforcing part 3. With the above arrangement, it is possible to avoid the cable tie 20 affecting the reinforcing part 3, and the strength of the reinforcing part 3 is not weakened while the cable tie 20 is used to tightly fix the battery pack 30 and the fastener 1.

[0030] In some embodiments, a rounded chamfer is provided at the edge of the fastener 1 along the height direction of the fastener 1 to cooperate with the cable tie 20. During battery assembly, the battery pack 30 is clamped between two fasteners 1 and then connected using the cable tie 20. By providing the rounded chamfer, the cable tie 20 smoothly transitions at the edge of the fastener 1, thereby ensuring uniform force distribution on the cable tie 20 and avoiding stress concentration.

[0031] like Figure 2 and Figure 3 As shown, in some embodiments, the fastener 1 is provided with a weight-reducing groove 11. By providing the weight-reducing groove 11, the weight of the fastener 1 can be reduced without affecting its strength, and material usage can be saved.

[0032] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery device, characterized in that, It includes a battery pack (30) and a fastener (1) provided at the end of the battery stacking direction, wherein the fastener (1) is provided with a reinforcing part (3) in the middle region away from the surface of the battery pack (30); The ratio of the area of ​​the reinforcing part (3) to the area of ​​the fastener (1) is in the range of 1 / 3 to 1 / 2.

2. The battery device according to claim 1, characterized in that, The reinforcing part (3) is disposed in the upper middle part of the fastener (1).

3. The battery device according to claim 1, characterized in that, The ratio of the height of the reinforcing part (3) to the height of the fastener (1) is in the range of 1 / 4 to 1 / 2.

4. The battery device according to claim 1, characterized in that, The fastener (1) has a reinforcing part (2) on the surface away from the battery pack (30). Both the reinforcing part (3) and the reinforcing part (2) are mesh-shaped reinforcing ribs. The mesh density of the reinforcing part (3) is 2-4 times that of the mesh density of the reinforcing part (2).

5. The battery device according to claim 1, characterized in that, The fastener (1) has a reinforcing part (2) on the surface away from the battery pack (30), and the thickness of the reinforcing part (3) along the battery stacking direction is greater than the thickness of the reinforcing part (2).

6. The battery device according to claim 1, characterized in that, The battery device also includes cable ties (20), which are fastened to the two fasteners (1) located at the ends of the battery pack (30).

7. The battery device according to claim 6, characterized in that, The projection of the cable tie (20) along the battery stacking direction does not coincide with the reinforcement (3).

8. The battery device according to claim 6, characterized in that, Along the height direction of the fastener (1), a rounded chamfer is provided at the edge of the fastener (1) to cooperate with the cable tie (20).

9. The battery device according to claim 1, characterized in that, The fastener (1) is provided with a weight-reducing groove (11).

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