Battery assembly and battery pack

Abstract

The utility model provides a kind of battery assembly and battery group.The battery assembly includes: battery body, battery body has at least two groups of opposite side walls, one group of opposite side walls is all first side wall, another group of opposite side walls is all second side wall, and the area of first side wall is greater than the area of second side wall;Insulating structure, insulating structure is set on battery body, and insulating structure at least corresponding second side wall is provided with at least one avoiding opening, to make at least a part of second side wall exposedThe utility model solves the problem that the shearing strength of battery insulating structure and structural adhesive in the prior art cannot meet the design requirements of battery group.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery component and battery pack. Background Technology

[0002] Battery surfaces are typically covered with an insulating structure to form battery modules. The insulating structure is usually encapsulated by covering the entire battery surface (the side with the largest surface area), the smallest surface area, and the bottom. When battery modules are arranged into a battery pack, structural adhesive is applied to the small surfaces of the battery modules to bond them to the side panels and increase the overall structural strength of the battery pack. As the requirements for the structural strength of battery packs become increasingly stringent, the requirements for the shear strength between the small surfaces and the side panels also become increasingly stringent. In existing technologies, the commonly used battery insulation structure on the battery casing surface is PET (polyethylene terephthalate) material with adhesive backing. The shear strength of this type of battery insulation structure and structural adhesive no longer meets the design requirements.

[0003] Therefore, existing technologies suffer from the problem that the shear strength of the battery insulation structure and structural adhesive cannot meet the design requirements of battery packs. Utility Model Content

[0004] The main objective of this invention is to provide a battery component and battery pack to solve the problem that the shear strength of the battery insulation structure and structural adhesive in the prior art cannot meet the design requirements of the battery pack.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery assembly is provided, comprising: a battery body having at least two sets of opposing sidewalls, wherein one set of opposing sidewalls along a first direction are both first sidewalls, and the other set of opposing sidewalls along a second direction are both second sidewalls, and the area of ​​the first sidewall is larger than the area of ​​the second sidewall, and the first direction is perpendicular to the second direction; and an insulating structure having at least one insulating structure disposed on the first sidewall and the second sidewall of the battery body, and the insulating structure having at least one clearance opening corresponding to at least one second sidewall to expose at least a portion of the second sidewall.

[0006] Furthermore, the insulation structure has at least one clearance opening on each of the two second sidewalls.

[0007] Furthermore, the two clearance openings corresponding to the two second sidewalls are provided one-to-one, and the projections of the two corresponding clearance openings in the second direction coincide.

[0008] Furthermore, the same second sidewall is provided with multiple clearance openings arranged at intervals along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0009] Furthermore, the second sidewall has a first central axis extending along a first direction and a third central axis extending along a third direction, and the clearance openings corresponding to the same second sidewall are symmetrically arranged along the first central axis and / or the third central axis, wherein the first direction, the second direction, and the third direction are mutually perpendicular.

[0010] Furthermore, in the first direction, the length of the clearance opening is less than the distance between the two first sidewalls; and / or, in the third direction, the total height of all clearance openings corresponding to the same second sidewall is less than the height of the battery body, wherein the first direction, the second direction, and the third direction are mutually perpendicular.

[0011] Furthermore, in the first direction, the length of the clearance opening ranges from 1 to 200 mm; and / or, in the third direction, the height of the clearance opening ranges from 1 to 500 mm.

[0012] According to another aspect of the present invention, a battery pack is provided, including a plurality of battery components and side plates arranged along a first direction, the side plates being located on at least one side of the battery components along a second direction, the side plates extending along the first direction, and an exposed portion of a second sidewall being bonded and fixed to the side plates.

[0013] Furthermore, a side plate is provided for a set of clearance openings arranged along the first direction, and the side plate covers the clearance openings along the third direction.

[0014] Furthermore, the height h1 of the side plate and the height h2 of the clearance opening satisfy the following conditions: 0.1mm≤h1-h2≤100mm, and the first direction, the second direction, and the third direction are mutually perpendicular.

[0015] Applying the technical solution of this utility model, the battery assembly in this application includes a battery body and an insulating structure. The battery body has at least two sets of opposing sidewalls, one set of opposing sidewalls along a first direction being the first sidewall, and the other set of opposing sidewalls along a second direction being the second sidewall. The area of ​​the first sidewall is larger than the area of ​​the second sidewall, and the first direction is perpendicular to the second direction. The insulating structure is at least disposed on the first sidewall and the second sidewall of the battery body, and the insulating structure has at least one clearance opening corresponding to at least one second sidewall, so that at least a portion of the second sidewall is exposed.

[0016] When using the battery assembly of this application, the insulating structure is at least disposed on the first and second sidewalls of the battery body and covers at least a portion of the battery body to protect it. Simultaneously, since the insulating structure has an clearance opening corresponding to the second sidewall of the battery body, the portion of the battery body exposed outside the clearance opening can be directly bonded and fixed to the side plate of the battery pack using structural adhesive, thereby improving the shear strength between the battery body and the side plate. Therefore, the battery assembly of this application effectively solves the problem in the prior art where the shear strength of the battery insulating structure and structural adhesive cannot meet the design requirements of the battery pack. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of a battery assembly according to a specific embodiment of the present invention is shown;

[0019] Figure 2 It shows Figure 1 Exploded view of the battery assembly in the image;

[0020] Figure 3 A schematic diagram of a portion of the battery pack structure in this application is shown;

[0021] Figure 4 It shows Figure 3 An exploded view of part of the battery pack structure.

[0022] The above figures include the following reference numerals:

[0023] 10. Battery body; 11. First sidewall; 12. Second sidewall; 13. Insulating patch; 14. Positive terminal; 15. Negative terminal; 20. Insulating structure; 21. Clearance opening; 211. First clearance opening; 212. Second clearance opening; 213. Third clearance opening; 22. Top opening; 30. Battery array; 40. Side plate. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0027] To address the problem that the shear strength of the battery insulation structure and structural adhesive in the prior art cannot meet the design requirements of battery packs, this application provides a battery component and a battery pack.

[0028] like Figure 1 and Figure 2 As shown, the battery assembly in this application includes a battery body 10 and an insulating structure 20. The battery body 10 has at least two sets of opposing sidewalls, one set of which are opposing sidewalls along a first direction, both being first sidewalls 11, and the other set of which are opposing sidewalls along a second direction, both being second sidewalls 12. The area of ​​the first sidewall 11 is larger than the area of ​​the second sidewall 12, and the first direction is perpendicular to the second direction. The insulating structure 20 is at least disposed on the first sidewall 11 and the second sidewall 12 of the battery body 10, and the insulating structure 20 has at least one clearance opening 21 corresponding to at least one second sidewall 12, so that at least a portion of the second sidewall 12 is exposed.

[0029] When using the battery assembly of this application, the insulating structure 20 covers the battery body 10 and at least a portion of the battery body 10, thereby protecting the battery body 10. Simultaneously, since the insulating structure 20 has an clearance opening 21 corresponding to the second sidewall 12 of the battery body 10, the portion of the battery body 10 exposed through the clearance opening 21 can directly adhere to the side plate 40 of the battery pack, thereby improving the shear strength between the battery body 10 and the side plate 40. Therefore, the battery assembly of this application effectively solves the problem in the prior art where the shear strength of the battery insulating structure and structural adhesive cannot meet the battery design requirements. Specifically, the insulating structure 20 of this application can be provided only on the first sidewall 11 and the second sidewall 12, or it can simultaneously cover the top and / or bottom surface of the battery body, and the portion of the insulating structure 20 corresponding to the first sidewall 11, top surface, or bottom surface of the battery body can have clearance openings as needed. Specifically, the insulating structure 20 covers the bottom surface of the battery body 10, and a top opening 22 is formed above the insulating structure 20. At least a portion of the top surface of the battery body 10 is exposed from the top opening 22. An insulating patch 13 is attached to the top surface of the battery body 10, and the positive terminal 14 and the negative terminal 15 of the battery body 10 pass through the insulating patch 13.

[0030] Since the area of ​​the first sidewall 11 is larger than the area of ​​the second sidewall 12, in this application, the first sidewall 11 is actually the large surface of the battery body 10, while the second sidewall 12 is actually the small surface of the battery body 10.

[0031] In one specific embodiment of this application, the insulating structure 20 is provided with at least one clearance opening 21 for each of the two second sidewalls 12. That is, in this embodiment, both second sidewalls 12 can be fitted with the side plate 40 of the battery pack through their respective clearance openings 21.

[0032] Preferably, the exposed areas of the two second sidewalls 12 are the same. That is, in this application, the areas of the two second sidewalls 12 directly attached to the battery pack casing are the same, thereby ensuring that the forces on the two second sidewalls 12 are equal or approximately equal. One way to achieve the same exposed area of ​​the two second sidewalls 12 in this application is to make all the clearance openings 21 the same size, and the number of clearance openings 21 corresponding to each second sidewall 12 is equal. Another way to achieve this is that the opening sizes of the different clearance openings 21 may be different, in which case the number of clearance openings 21 corresponding to each second sidewall 12 may be different.

[0033] In one specific embodiment of this application, the number of clearance openings 21 corresponding to the two second sidewalls 12 is the same. Furthermore, the opening sizes of the different clearance openings 21 can also be the same.

[0034] Preferably, the clearance openings 21 corresponding to the two second sidewalls 12 are provided one-to-one, and the projections of the corresponding two clearance openings 21 in the second direction coincide. Alternatively, in this application, the clearance opening 21 in the insulating structure 20 corresponding to one of the second sidewalls 12 is symmetrical to the clearance opening 21 in the insulating structure 20 corresponding to the other second sidewall 12. That is, in this application, the insulating structure 20 is provided with two sets of clearance openings 21 corresponding to the two second sidewalls 12, each set having at least one clearance opening 21, and the two sets of clearance openings 21 are symmetrically arranged with respect to the battery body 10. This arrangement ensures that after the two second sidewalls 12 are bonded to different side plates 40, the force is more symmetrical, thereby ensuring more stable force between the battery array 30 and the two side plates.

[0035] Optionally, the two first sidewalls 11 are arranged along a first direction, and the two second sidewalls 12 are arranged along a second direction. Each second sidewall 12 has a plurality of clearance openings 21 spaced apart along a third direction. That is, the plurality of clearance openings 21 corresponding to the same second sidewall 12 are arranged along a third direction, and the first direction, second direction, and third direction are mutually perpendicular. Furthermore, in this application, the first direction can be the X-axis direction, the second direction can be the Y-axis direction, and the third direction can be the Z-axis direction. Therefore, in this application, the plurality of clearance openings 21 corresponding to the same second sidewall 12 can be arranged along the Z-axis direction, or in other words, arranged vertically.

[0036] Preferably, the second sidewall 12 has a first central axis extending along a first direction and a third central axis extending along a third direction, and the clearance openings 21 corresponding to the same second sidewall 12 are symmetrically arranged along the first central axis and / or the third central axis. By symmetrically arranging them along the third central axis, it can be ensured that the multiple clearance openings 21 corresponding to the same second sidewall 12 can be arranged more centrally relative to the second sidewall, thereby ensuring that the force on the second sidewall 12 is more uniform when it is attached to the side plate 40 of the battery pack through the clearance openings 21, and by symmetrically arranging them along the first central axis, the binding force of the side plate 40 on the battery body 10 can be more uniform.

[0037] Of course, in this application, the multiple clearance openings 21 corresponding to the same second sidewall 12 can also be partially arranged along the first direction.

[0038] In one specific embodiment of this application, the second sidewall 12 is only partially exposed. Specifically, in the first direction, the length of the clearance opening 21 is less than the distance between the two first sidewalls 11, and in the third direction, the total height of all clearance openings 21 corresponding to the same second sidewall 12 is less than the height of the battery body 10, thereby ensuring the insulation performance of the battery assembly. Further, in this embodiment, the clearance opening 21 is rectangular in shape. The length direction of the rectangle is the first direction, the height direction is the third direction, the length of the rectangle is greater than or equal to 1 mm and less than or equal to 200 mm, and the height of the rectangle is greater than or equal to 1 mm and less than or equal to 500 mm.

[0039] Of course, the clearance opening 21 in this application can also be other shapes, such as rhombus or circle. Of course, the clearance opening 21 in this application can also be irregular in shape.

[0040] Therefore, the specific shape of the clearance opening 21 and the arrangement of multiple clearance openings 21 corresponding to the same second sidewall 12 can be adaptively adjusted according to actual usage requirements in this application.

[0041] In such Figure 1 and Figure 2In the illustrated embodiment, the same second sidewall 12 corresponds to three clearance openings 21. In the third direction, the three clearance openings 21 are, from top to bottom, the first clearance opening 211, the second clearance opening 212, and the third clearance opening 213. Of course, in this application, the number and position of the clearance openings 21 corresponding to the same second sidewall 12 can be adjusted. That is, the same second sidewall 12 can correspond to two or one clearance opening 21. When it corresponds to two clearance openings 21, it can be any two of the first clearance opening 211, the second clearance opening 212, and the third clearance opening 213. When it corresponds to one clearance opening 21, it can be any one of the first clearance opening 211, the second clearance opening 212, and the third clearance opening 213.

[0042] Optionally, the film thickness of the insulating structure 20 is greater than or equal to 0.01 mm and less than or equal to 1 mm. Since the insulating structure 20 is a three-dimensional structure, the film thickness of the insulating structure 20 actually refers to the thickness of the thin film used to fabricate the insulating structure 20. Furthermore, the specific thickness of the thin film can be adaptively adjusted according to actual design requirements. Choosing a suitable film thickness in this application ensures that the second sidewall 12, after being exposed through the avoidance opening 21 to the insulating structure 20, can be more easily bonded to the side plate 40, and that the insulation performance of the battery assembly is guaranteed.

[0043] And as Figure 3 and Figure 4 As shown, the battery pack in this application includes at least one battery column 30 and a side plate 40. The battery column 30 is composed of a plurality of battery components arranged along a first direction. The side plate 40 is located on at least one side of the battery components along a second direction and extends along the first direction. The exposed portion of the second sidewall 12 is bonded and fixed to the side plate 40.

[0044] Optionally, a set of clearance openings 21 arranged along the first direction corresponds to a side plate 40, meaning that multiple clearance openings 21 of multiple battery modules located on the same straight line extending along the first direction correspond to the same side plate 40. Along the third direction, the side plate 40 covers the clearance openings 21. By providing a side plate 40 corresponding to the clearance opening 21, compared to providing a side plate 40 that adheres to the entire second sidewall 12, this application can ensure the bonding strength between the side plate 40 and the battery body 10, while also saving material and reducing material costs. Furthermore, the height h1 of the side plate and the height h2 of the clearance opening satisfy: 0.1mm ≤ h1 - h2 ≤ 100mm, so that the side plate can completely cover the clearance opening 21, ensuring the insulation performance of the battery pack.

[0045] In one specific embodiment of this application, the battery array 30 has multiple side plates 40 corresponding to the two side walls opposite each other in the second direction. The side plates 40 extend along the first direction and are in contact with the portion of the second side wall 12 of the battery assembly exposed through the clearance opening 21. Furthermore, in this application, the battery pack can have a frame structure formed by interconnected end plates and side plates 40, and the battery array 30 with multiple battery assemblies is housed inside the frame structure, thereby achieving the function of positioning and fixing the battery array 30. In this case, two of the four side wall surfaces of the battery array 30 correspond to the first side walls 11 of two different battery bodies 10 and correspond to the end plates of the frame structure, while each of the other two side wall surfaces corresponds to the second side walls 12 of multiple battery bodies 10 and corresponds to the side plates 40 of the frame structure. Meanwhile, in this application, multiple strip-shaped side plates 40 can be correspondingly provided on the same side of the frame structure, or multiple side plates 40 can be provided between two end plates. This allows the side plates 40 to be provided only for the portion of the second sidewall 12 exposed outside the clearance opening 21, and the side plates 40 to be adhered to the portion of the second sidewall 12 exposed outside the clearance opening 21. Therefore, in this application, the side of the frame structure with side plates 40 is surrounded by multiple side plates 40 spaced apart. This arrangement not only reduces the materials used in manufacturing the frame structure but also effectively reduces the overall weight of the battery pack, thus facilitating the lightweight design of the battery pack.

[0046] In other words, the purpose of providing the clearance opening 21 in this application is actually to expose a portion of the second sidewall 12 and bond it to the side panel 40 of the frame structure, allowing the side panel 40 and the second sidewall 12 of the battery body 10 to be directly bonded. This increases the shear strength between the side panel 40 and the battery body 10 while improving the overall strength of the battery array 30. This solves the problem in the prior art where the shear strength of the battery insulation structure and structural adhesive cannot meet the battery design requirements.

[0047] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0048] 1. Effectively solves the problem that the shear strength of the battery insulation structure and structural adhesive in the existing technology cannot meet the design requirements of the battery pack;

[0049] 2. Simple structure and stable performance.

[0050] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0051] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0052] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0053] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery assembly, comprising: include: The battery body (10) has at least two sets of opposing sidewalls, one set of opposing sidewalls along a first direction being a first sidewall (11), and the other set of opposing sidewalls along a second direction being a second sidewall (12), and the area of ​​the first sidewall (11) is greater than the area of ​​the second sidewall (12), and the first direction is perpendicular to the second direction. An insulating structure (20) is provided on at least the first sidewall (11) and the second sidewall (12) of the battery body (10), and the insulating structure (20) is provided with at least one clearance opening (21) corresponding to at least one of the second sidewalls (12) so that at least a portion of the second sidewall (12) is exposed.

2. The battery assembly according to claim 1, characterized in that, The insulating structure (20) is provided with at least one clearance opening (21) for each of the two second sidewalls (12).

3. The battery assembly according to claim 2, characterized in that, The two second sidewalls (12) are provided with corresponding clearance openings (21), and the projections of the two corresponding clearance openings (21) in the second direction coincide.

4. The battery assembly according to claim 1, characterized in that, The same second sidewall (12) is provided with a plurality of clearance openings (21) arranged at intervals along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

5. The battery assembly according to claim 1, characterized in that, The second sidewall (12) has a first central axis extending along a first direction and a third central axis extending along a third direction. The clearance opening (21) corresponding to the same second sidewall (12) is symmetrically arranged along the first central axis and / or the third central axis, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

6. The battery assembly according to claim 1, characterized in that, In the first direction, the length of the clearance opening (21) is less than the distance between the two first sidewalls (11); and / or, in the third direction, the total height of all the clearance openings (21) corresponding to the same second sidewall (12) is less than the height of the battery body (10), wherein the first direction, the second direction, and the third direction are mutually perpendicular.

7. The battery assembly according to claim 6, characterized in that, In the first direction, the length of the clearance opening (21) ranges from 1 to 200 mm; and / or, in the third direction, the height of the clearance opening (21) ranges from 1 to 500 mm.

8. A battery pack, characterized in that, The battery assembly includes a plurality of battery components and side panels (40) arranged along a first direction as described in any one of claims 1 to 7, the side panels (40) being located on at least one side of the battery assembly along the second direction, the side panels (40) extending along the first direction, and an exposed portion of the second sidewall (12) being bonded and fixed to the side panels (40).

9. The battery pack according to claim 8, characterized in that, A set of the avoidance openings (21) arranged along the first direction are respectively provided with a side plate (40), and along the third direction, the side plate (40) covers the avoidance openings (21).

10. The battery pack according to claim 9, characterized in that, The height h1 of the side plate (40) and the height h2 of the clearance opening satisfy the following: 0.1mm≤h1-h2≤100mm, and the first direction, the second direction, and the third direction are perpendicular to each other.

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