Battery system and vehicle

Abstract

The utility model provides a battery system and a vehicle, and belongs to the technical field of power batteries. The battery system comprises a box body, a box cover, a plurality of battery modules and a pressing and fixing structure, wherein the box cover covers the box body, and the plurality of battery modules are sequentially stacked in the box body in a first direction. The pressing and fixing structure is located between the box cover and the battery module, the pressing and fixing structure is pressed on the battery module in the second direction, a plurality of structural walls are arranged in the pressing and fixing structure, and a plurality of structural cavities are defined by the structural walls and the outer surface of the pressing and fixing structure. The battery comprises at least one battery system. Therefore, according to the battery system provided by the invention, the pressing and fixing structure can be arranged on the battery module, so that the deformation of the box cover can be effectively relieved, the modality of the battery system is remarkably improved, and the reliability and the safety of the battery system are improved. In addition, a plurality of structural walls and structural cavities are arranged in the pressing and fixing structure, the structural strength is guaranteed, the structural weight is reduced, and the cost of the whole vehicle is reduced.

Description

Technical Field

[0001] The present application relates to the field of power battery technology, and in particular to a battery system and a vehicle. Background Art

[0002] With the continuous development of science and technology and the diversification of user needs, new energy power battery technology has also been rapidly developed. Among them, power batteries, as the power source of electric vehicles, play a vital role in electric vehicles. Therefore, the optimization design of the power battery structure of electric vehicles has important research significance.

[0003] Among them, current power batteries are usually integrated into the vehicle body and directly connected to the seats, which can greatly reduce the number of parts and improve assembly production efficiency. This also puts increasingly higher requirements on the structural design of power batteries.

[0004] However, the current power battery pack, as the power source of electric vehicles, has problems such as being unable to withstand the weight of the entire vehicle and external pedaling pressure. The box body and the box cover are easily deformed under pedaling pressure, which has a certain impact on the performance and safety of the battery system. Utility Model Content

[0005] This application provides a battery system and vehicle that incorporates a compression-fixing structure on the battery module, effectively mitigating deformation of the battery cover, significantly improving the battery system's modal properties, and increasing the reliability and safety of the battery system. Furthermore, the compression-fixing structure incorporates several structural walls and cavities, ensuring structural strength, reducing weight, and lowering overall vehicle cost.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A first aspect of the present application provides a battery system, comprising:

[0008] A box body and a box cover, wherein the box cover is arranged on the box body;

[0009] A plurality of battery modules, wherein the plurality of battery modules are stacked in sequence in a first direction within the box;

[0010] A compression structure is located between the box cover and the battery module, the compression structure is pressed against the battery module in the second direction, and the interior of the compression structure has a plurality of structural walls, and the plurality of structural walls and the outer surface of the compression structure enclose a plurality of structural cavities;

[0011] The first direction is perpendicular to the second direction.

[0012] Based on the above technical solution, this application can also be improved as follows.

[0013] In one possible implementation, each battery module includes a plurality of battery cell units;

[0014] A plurality of battery cell units are stacked in sequence in a third direction to form a battery module, and the compression structure is extended along the third direction;

[0015] Each battery cell unit has a top surface and a bottom surface that are opposite to each other, and two side surfaces that are opposite to each other;

[0016] The third direction is perpendicular to the first direction and the second direction respectively.

[0017] In a possible implementation, the compression structure includes: a first compression member and two second compression members;

[0018] The first pressing member is located between the top surfaces of two adjacent battery core units;

[0019] The second pressing piece is located at the junction of the top surface and one of the side surfaces of the battery cell unit, or the second pressing piece is located at the junction of the top surface and the other side surface of the battery cell unit.

[0020] In a possible implementation, the first pressing member is a T-shaped structure.

[0021] In a possible implementation, the second pressing member is an L-shaped structure.

[0022] In a possible implementation, the outer edge of the box cover is fixedly connected to the box body via fasteners, and the inner surface of the box cover is in contact with the compression structure.

[0023] In a possible implementation, a buffer portion is provided on a side of the compression structure facing the box cover;

[0024] The buffer part is matched with the box cover, and the buffer part is used for supporting the box cover.

[0025] In a possible implementation, an adhesive is provided on a surface of the compression structure facing the side of the battery cell unit, and the compression structure is connected to the side of the battery cell unit via the adhesive.

[0026] In a possible implementation, the compression structure abuts against the top surface of the battery cell unit, so that the force of the box cover is transmitted to the battery cell unit through the compression structure.

[0027] A second aspect of the present application provides a vehicle comprising at least one of the above-mentioned battery systems.

[0028] The present application provides a battery system and a vehicle, which includes a box body, a box cover, a plurality of battery modules and a compression structure. The box cover is provided on the box body, and a plurality of battery modules are stacked in the box body in sequence in a first direction. The compression structure is located between the box cover and the battery module, and the compression structure is pressed onto the battery module in a second direction, and the interior of the compression structure has a plurality of structural walls, and the plurality of structural walls and the outer surface of the compression structure are arranged to form a plurality of structural cavities. The first direction is perpendicular to the second direction. The battery includes at least one of the above-mentioned battery systems. In this way, the battery system provided by the present application can be provided with a compression structure on the battery module, which can effectively alleviate the deformation of the box cover, significantly improve the mode of the battery system, and increase the reliability and safety of the battery system. In addition, a plurality of structural walls and structural cavities are provided inside the compression structure, which ensures the strength of the structure, reduces the structural weight, and reduces the cost of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 A schematic structural diagram of a battery system provided in one embodiment of the present application;

[0031] Figure 2 A schematic structural diagram of a compression-fixing structure of a battery system provided in one embodiment of the present application;

[0032] Figure 3 A partial cross-sectional schematic diagram of a battery system provided in a second direction according to an embodiment of the present application.

[0033] Description of reference numerals:

[0034] 100-battery system;

[0035] 200-cabinet;

[0036] 300-battery module;

[0037] 310 - battery cell unit; 311 - top surface; 312 - bottom surface; 313 - side surface; 313a - first side surface; 313b - second side surface;

[0038] 400-pressed structure;

[0039] 410 - structural wall; 420 - structural cavity; 430 - first pressing member; 431 - first protrusion; 432 - second protrusion; 440 - second pressing member; 441 - third protrusion; 442 - fourth protrusion; 450 - buffer;

[0040] 500-adhesive. DETAILED DESCRIPTION

[0041] As described in the background technology, the current power battery pack, as the power source of electric vehicles, has problems such as being unable to withstand the weight of the entire vehicle and external pedaling pressure. The box body and the box cover are easily deformed under pedaling pressure, which has a certain impact on the performance and safety of the battery system.

[0042] In response to the above technical problems, an embodiment of the present application provides a battery system and a vehicle, which includes a box body, a box cover, a plurality of battery modules and a compression structure. The box cover is provided on the box body, and a plurality of battery modules are stacked in the box body in sequence in the first direction. The compression structure is located between the box cover and the battery module, and the compression structure is pressed onto the battery module in the second direction, and the interior of the compression structure has a plurality of structural walls, and the plurality of structural walls and the outer surface of the compression structure are arranged to form a plurality of structural cavities. The first direction is perpendicular to the second direction. The battery includes at least one of the above-mentioned battery systems. In this way, the battery system provided by the present application can be provided with a compression structure on the battery module, which can effectively alleviate the deformation of the box cover, significantly improve the mode of the battery system, and increase the reliability and safety of the battery system. In addition, a plurality of structural walls and structural cavities are provided inside the compression structure, which ensures the strength of the structure, reduces the structural weight, and reduces the cost of the entire vehicle.

[0043] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0044] The present invention provides a battery system and vehicle in which a compression-fixing structure is provided on the battery module, effectively mitigating deformation of the battery cover, significantly improving the battery system's modal properties, and increasing the reliability and safety of the battery system. Furthermore, the compression-fixing structure includes several structural walls and cavities, ensuring structural strength, reducing weight, and lowering overall vehicle cost. The specific structures of the battery system and vehicle provided in the present invention are described below, with reference to the accompanying drawings.

[0045] refer to Figure 1In a first aspect, an embodiment of the present application provides a battery system 100. The battery system 100 may include a case 200, a case cover (not shown in the figure), a battery module 300, and a compression structure 400. In one possible implementation, the number of battery modules 300 may be several, and the present application does not limit the number of battery modules 300. In an embodiment of the present application, several battery modules 300 may be stacked in sequence in the case 200 in a first direction. For example, both the battery module 300 and the case 200 may be rectangular structures, the case 200 may support the battery module 300, and the rectangular structure size of the case 200 is greater than or equal to the rectangular structure size of the battery module 300, so that the case 200 can carry several battery modules 300.

[0046] Based on the above embodiment, the box cover can be placed on the box body 200. In a possible implementation, the box cover can also be a rectangular structure, and the size of the box cover can be slightly larger than the size of the box body 200, or the size of the box cover can be the same as the size of the box body 200, so that the box cover can be placed on the box body 200, so that the battery module 300 can be located between the box cover and the box body 200, providing a certain degree of protection for the battery module 300.

[0047] refer to Figure 1 as well as Figure 2 In the specific implementation of the embodiment of the present application, the compression structure 400 can be located between the box cover and the battery module 300, and the compression structure 400 can be pressed against the battery module 300 in the second direction, and the interior of the compression structure has a structural wall 410 and a structural cavity 420. In a possible implementation, the number of the structural wall 410 and the structural cavity 420 can be multiple, and the present application does not limit the number of the structural wall 410 and the structural cavity 420. In the embodiment of the present application, if Figure 3 As shown, a number of structural walls 410 are arranged perpendicularly to each other inside the compression structure 400, so that the several structural walls 410 arranged perpendicularly to each other and the outer surface of the compression structure 400 are enclosed into a number of structural cavities 420. It can be understood that the structural cavity 420 is a hollow structure, so that the entire compression structure 400 has a honeycomb structure. Compared with the thin plate structure in the related art, the compression structure 400 provided in the embodiment of the present application reduces the use of raw materials, thereby reducing costs. In addition, the arrangement of the structural walls 410 and the structural cavities 420 can enhance the ability of the compression structure 400 to resist deformation. When encountering collision deformation, the compression structure 400 can provide a certain support effect, which is beneficial to improving the safety performance of the entire vehicle.

[0048] Continue to refer Figure 1, based on the above embodiment, each battery module 300 may include a battery cell unit 310. In one possible implementation, the number of battery cell units 310 may be several, and the present application does not limit the number of battery cell units 310. In an embodiment of the present application, several battery cell units 310 may be stacked in sequence in a third direction to form a battery module 300. The compression structure 400 may be extended along the stacking direction of several battery cell units 310, that is, the compression structure 400 is extended along the third direction to compress the battery module 300. In one possible implementation, the battery cell unit 310 may also be a rectangular structure, such as Figure 3 As shown, each battery cell unit 310 may have a top surface 311, a bottom surface 312, and two side surfaces 313. The top surface 311 may be disposed opposite to the bottom surface 312, and the two side surfaces 313 may also be disposed opposite to each other.

[0049] It should be noted that, in a possible implementation, the first direction may be the stacking direction of the battery module 300, the second direction may be the thickness direction of the battery module, and the third direction may be the stacking direction of the battery cell unit 310. Figure 1 The x direction is the first direction, the y direction is the second direction, and the z direction is the third direction. It can be understood that the first direction, the second direction, and the third direction are perpendicular to each other.

[0050] Continue to refer Figure 2 as well as Figure 3 On the basis of the above embodiment, the compression structure 400 may further include: a first compression member 430 and a second compression member 440. In a possible implementation, the number of the first compression member 430 may be at least one, and the number of the second compression member 440 may be at least two. The present application does not limit the number of the first compression member 430 and the second compression member 440. In the embodiment of the present application, an example is given in which the number of the first compression member 430 is one and the number of the second compression member 440 is two. The first compression member 430 may be located between the top surfaces 311 of two adjacent battery cell units 310. The second compression member 440 may be located at the junction of the top surface 311 of the battery cell unit 310 and one of the side surfaces 313, or the second compression member 440 may be located at the junction of the top surface 311 of the battery cell unit 310 and the other side surface 313.

[0051] Continue to refer Figure 3Based on the above embodiment, in one possible implementation, each battery cell unit 310 may have a first side surface 313a and a second side surface 313b, and the first side surface 313a and the second side surface 313b of each battery cell unit 310 are arranged opposite to each other. Among two adjacent battery cell units 310, the first side surface 313a of one battery cell unit 310 may be arranged toward the second side surface 313b of the other battery cell unit 310. It is understood that the second pressing member 440 may be located at the junction of the top surface 311 of the battery cell unit 310 and the first side surface 313a. In another possible implementation, the second pressing member 440 may be located at the junction of the top surface 311 of the battery cell unit 310 and the second side surface 313b.

[0052] Continue to refer Figure 2 as well as Figure 3 , based on the above embodiment, wherein, in one possible implementation, the first compression member 430 may be a T-shaped structure. The first compression member 430 may have a first protrusion 431 and a second protrusion 432. In the embodiment of the present application, the outer surface of the first protrusion 431 facing the battery cell unit 310 may contact the top surface 311 of the two adjacent battery cell units 310. The outer surface of the second protrusion 432 facing the battery cell unit 310 may contact the first side surface 313a and the second side surface 313b of the two adjacent battery cell units 310. In this way, the first compression member 430 with a T-shaped structure can be inserted into the gap between the two adjacent battery cell units 310, so that the first compression member 430 is adapted to the battery module 300.

[0053] Continue to refer Figure 2 as well as Figure 3 , based on the above embodiment, wherein, in one possible implementation, the second compression member 440 may be an L-shaped structure. The second compression member 440 may have a third protrusion 441 and a fourth protrusion 442. In the embodiment of the present application, the outer surface of the third protrusion 441 facing the battery cell unit 310 may contact the top surface 311 of the battery cell unit 310. The outer surface of the fourth protrusion 442 facing the battery cell unit 310 may contact the first side surface 313a or the second side surface 313b of the battery cell unit 310. In this way, the second compression member 440 with an L-shaped structure can be inserted into the gap between the side surface 313 of the battery cell unit 310 and the box body 200, so that the second compression member 440 is adapted to the battery module 300.

[0054] Of course, in other embodiments, the first compression member 430 and the second compression member 440 may also have other forms, including but not limited to T-shaped, L-shaped, and other structures. It is understood that the structural form of the first compression member 430 and the second compression member 440 only needs to be compatible with the battery module 300, and the embodiments of the present application are not limited thereto.

[0055] Based on the above embodiment, the outer edge of the box cover can be fixedly connected to the box body 200 via fasteners, and the inner surface of the box cover can contact the compression structure 400. It is understood that one side of the compression structure 400 can abut the box cover, while the other end of the compression structure 400 can contact the battery cell 310. This allows external forces applied to the box cover to be directly transmitted to the battery cell 310 through the compression structure 400, reducing the pressure applied to the box cover by pedaling. In one possible implementation, the fasteners can be screws, which is not a limitation in this embodiment of the present application.

[0056] Continue to refer Figure 2 On the basis of the above embodiment, a buffer portion 450 is provided on the side of the compression structure 400 facing the box cover. The buffer portion 450 can cooperate with the box cover, and the buffer portion 450 can be used to support the box cover. In one possible implementation, the buffer portion 450 is provided on the side of the compression structure 400 that abuts the box cover. It is understandable that the buffer portion 450 can be provided on the side of the first compression member 430 facing the box cover and the side of the second compression member 440 facing the box cover. For example, the buffer portion 450 can be made of a hard buffer material, thereby providing a certain support for the box cover. In the embodiment of the present application, the buffer portion 450 can achieve an interference fit with the box cover, so that the buffer portion 450 effectively supports the box cover.

[0057] Continue to refer Figure 3 Based on the above embodiment, the compression structure 400 may have an adhesive 500 on its surface facing the side 313 of the battery cell 310. The compression structure 400 may be connected to the side 313 of the battery cell 310 via the adhesive 500. In one possible implementation, the second protrusion 432 of the first compression member 430, facing the outer surface of the battery cell 310, may be connected to the first side 313a and the second side 313b of two adjacent battery cells 310 via the adhesive 500. Correspondingly, the fourth protrusion 442 of the second compression member 440, facing the outer surface of the battery cell 310, may be connected to the first side 313a or the second side 313b of the battery cell 310 via the adhesive 500. In this way, the compression structure 400 can have a certain restraining effect on the battery cell 310 while also effectively securing the compression structure 400, thereby improving the modality of the entire battery system 100 and enhancing the reliability and safety of the battery system 100.

[0058] Continue to refer Figure 3 Based on the above embodiment, the compression structure 400 can abut against the top surface 311 of the battery cell 310, so that the force applied to the box cover is transmitted to the battery cell 310 through the compression structure 400. In one possible implementation, the first protrusion 431 of the first compression member 430, whose outer surface faces the battery cell 310, can abut against the top surfaces 311 of two adjacent battery cell 310. Correspondingly, the third protrusion 441 of the second compression member 440, whose outer surface faces the battery cell 310, can abut against the top surface 311 of the battery cell 310. In this way, the pressure exerted on the box cover can be transmitted to the battery cell 310 through the compression structure 400, effectively reducing the degree of deformation of the box cover.

[0059] A second aspect of an embodiment of the present application provides a vehicle (not shown in the figures), which may include at least one battery system 100 as described above.

[0060] In the embodiment of the present application, the battery system 100 provided herein can be provided with a compression structure 400 on the battery module 300, which can effectively alleviate deformation of the box cover, significantly improve the modal properties of the battery system 100, and increase the reliability and safety of the battery system 100. In addition, a plurality of structural walls 410 and structural cavities 420 are provided within the compression structure 400, ensuring structural strength, reducing structural weight, and lowering the cost of the entire vehicle.

[0061] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0062] It should be noted that phrases such as "in a specific implementation," "in some embodiments," "in this embodiment," and "exemplarily" mentioned in the specification indicate that the described embodiment may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0063] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0064] It should be readily understood that “on,” “above,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0065] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be in other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery system, characterized in that: include: A box body and a box cover, wherein the box cover is arranged on the box body; A plurality of battery modules, wherein the plurality of battery modules are stacked in sequence in a first direction within the box; a compression structure, the compression structure being located between the box cover and the battery module, the compression structure being pressed against the battery module in the second direction, and the interior of the compression structure comprising a plurality of structural walls, the plurality of structural walls and the outer surface of the compression structure enclosing a plurality of structural cavities; The first direction is perpendicular to the second direction.

2. The battery system according to claim 1, wherein: Each of the battery modules includes a plurality of battery cell units; A plurality of the battery core units are stacked in sequence in a third direction to form the battery module, and the compression structure is extended along the third direction; Each of the battery cell units has a top surface and a bottom surface that are opposite to each other, and two side surfaces that are opposite to each other; The third direction is perpendicular to the first direction and the second direction respectively.

3. The battery system according to claim 2, characterized in that The compression structure includes: a first compression member and two second compression members; The first pressing member is located between the top surfaces of two adjacent battery core units; The second pressing piece is located at the junction of the top surface of the battery cell unit and one of the side surfaces, or the second pressing piece is located at the junction of the top surface of the battery cell unit and the other side surface.

4. The battery system according to claim 3, characterized in that The first pressing member is a T-shaped structure.

5. The battery system according to claim 3, characterized in that The second pressing member is an L-shaped structure.

6. The battery system according to any one of claims 2 to 5, characterized in that: The outer edge of the box cover is fixedly connected to the box body through fasteners, and the inner surface of the box cover is in contact with the compression structure.

7. The battery system according to claim 6, characterized in that The compression structure is provided with a buffer portion on a side facing the box cover; The buffer portion cooperates with the box cover, and the buffer portion is used to support the box cover.

8. The battery system according to claim 7, characterized in that: The surface of the compression structure facing the side surface of the battery cell unit is provided with an adhesive, and the compression structure is connected to the side surface of the battery cell unit through the adhesive.

9. The battery system according to claim 8, characterized in that The compression structure abuts against the top surface of the battery cell unit, so that the action force of the box cover is transmitted to the battery cell unit through the compression structure.

10. A vehicle, characterized in that: A battery system comprising at least one battery system according to any one of claims 1 to 9.

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