Connecting structure and battery pack
By designing a connection structure with movable adjustable parts and limiting components in the battery pack, the problem of poor battery module connection caused by process tolerances was solved, and a safe and reliable battery pack connection was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GAC AION NEW ENERGY AUTOMOBILE CO LTD
- Filing Date
- 2025-04-10
- Publication Date
- 2026-04-17
AI Technical Summary
In the existing technology, the connection structure of the battery module has inconsistent height due to process tolerances, which makes it impossible to tighten the copper busbars, resulting in insufficient contact area, abnormal temperature rise, and potential safety hazards.
Design a connection structure comprising an end plate and an adjusting member. The adjusting member can move within a receiving space to absorb tolerances, and combined with a limiting component, ensures proper contact and avoids abnormal temperature rise.
By adjusting the movement of the components and cooperating with the limiting components, the height inconsistency caused by tolerances is absorbed, ensuring good contact and improving the safety and stability of the battery pack.
Smart Images
Figure CN224138248U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of batteries, and more specifically, to a connection structure and a battery pack. Background Technology
[0002] Power batteries are widely used in electric vehicle battery pack systems due to their high energy density and low carbon footprint. A power battery system consists of multiple modules connected in series and parallel, forming a complete power supply system through mechanical structures and various battery management mechanisms.
[0003] In related technologies, battery packs can be assembled from multiple battery modules, which involves the connection between adjacent battery modules. Therefore, how to achieve a safe connection between battery modules is particularly important. Utility Model Content
[0004] The purpose of this application is to provide a connection structure and battery pack that can absorb tolerances, achieve proper contact, avoid abnormal temperature rise, and improve safety.
[0005] In a first aspect, embodiments of this application provide a connection structure, including: an end plate having a receiving space; and an adjusting member disposed in the receiving space, wherein the outer edge dimension of the adjusting member is smaller than the dimension of the receiving space, such that the adjusting member can move relative to the receiving space in at least one direction.
[0006] In the technical solution of this application embodiment, an adjusting member is provided in the accommodating space of the end plate. The size of the adjusting member is smaller than the size of the accommodating space, so that when the two connecting structures are connected, the poor meshing caused by the height inconsistency due to tolerance can be absorbed by the movement of the adjusting member, so as to achieve proper contact, avoid abnormal temperature rise, and thus improve safety.
[0007] In some embodiments, the end plate is configured with a limiting component, which is disposed in the receiving space for limiting the adjustment member.
[0008] In the technical solution of this application embodiment, a limiting component is also provided in the accommodating space of the end plate. Through the function of the limiting component, not only can the adjustment component be limited, but also the adjustment component can be ensured to adjust relative to the accommodating space, which is beneficial to absorb the poor meshing situation caused by the height inconsistency due to tolerance.
[0009] In some embodiments, the limiting component includes a first limiting member, the first limiting member including a first connecting body and a first limiting body, the first connecting body being connected to the end plate, and the first limiting body being connected to the first connecting body, wherein one end of the adjusting member is limited by the end plate, and the other end is limited by the first limiting body.
[0010] In the technical solution of this application embodiment, the first limiting body is connected to the first connecting body, and the first limiting body can limit the adjustment member so that the adjustment member will not fall off when it moves freely in the accommodating space, which is beneficial to the connection between the two connecting structures.
[0011] In some embodiments, the limiting component further includes a second limiting member, the first limiting member and the second limiting member are disposed on opposite sides of the adjusting member, and the second limiting member includes a second connecting body and a second limiting body, the second connecting body is connected to the end plate, and the second limiting body is connected to the second connecting body, wherein the second connecting body is used to limit the adjusting member.
[0012] In the technical solution of this application embodiment, the second limiting body is connected to the second connecting body, and the adjusting member is limited to the accommodating space by the cooperation of the first limiting body and the second limiting body, so as to ensure that the adjusting member can move freely in the accommodating space, thereby realizing the connection between the connecting structures with different tolerance problems.
[0013] In some embodiments, both the first limiting body and the second limiting body are provided with a first gap from the adjusting member, and the first gap is configured to allow movement of the adjusting member. This first gap facilitates free movement of the adjusting member within the accommodating space, which is beneficial for subsequent interconnection of the connecting structures.
[0014] In some embodiments, a second gap is provided between the limiting component and the receiving space, the second gap being configured to accommodate deformation of the limiting component. By providing the second gap, it is convenient to assemble the adjusting member into the receiving space, and also convenient to replace the adjusting member.
[0015] In some embodiments, the adjusting member includes a first adjusting body and a second adjusting body, the first adjusting body being connected to the second adjusting body, and the cross-sectional dimension of the first adjusting body being larger than the cross-sectional dimension of the second adjusting body.
[0016] In the technical solution of this application embodiment, the first adjusting body is connected to the second adjusting body, and the cross-sectional dimensions of the first adjusting body and the second adjusting body are set to be different, which can facilitate the limiting of the adjusting member by the end plate when the connecting structure is connected.
[0017] In some embodiments, the end plate is provided with a limiting hole, which is configured to accommodate a portion of the adjusting member. This limiting hole can be used in the case of two connected structures to limit the adjustment member, ensuring stability after connection and improving safety.
[0018] Secondly, this application also provides a battery pack, comprising: a conductive structure, and a connection structure as described in any of the preceding claims, wherein an adjustment element of the connection structure is connected to the conductive structure.
[0019] In the technical solution of this application embodiment, the conductive structure connects to the adjusting member of the connecting structure, which can realize the connection between the two connecting structures. At the same time, since the adjusting member can move freely in the end plate, it can absorb the problem of inconsistent height at both ends of the conductive structure after connection due to tolerance, thus improving safety.
[0020] In some embodiments, the connection structure is configured with a plurality of conductive structures for connecting two adjacent connection structures, wherein the conductive structure includes a first conductive component and a second conductive component, the first conductive component is configured in one connection structure, the second conductive component is configured in another connection structure, and the first conductive component is connected to the second conductive component.
[0021] In the technical solution of this application embodiment, two adjacent connection structures can be connected through a first conductive component and a second conductive component. Furthermore, under the free movement of the adjusting component, the height inconsistency problem caused by tolerance issues can be avoided, thereby improving the safety after connection.
[0022] Other features and advantages of this disclosure will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the techniques described above.
[0023] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the connection structure provided in the embodiments of this application;
[0026] Figure 2 This is a schematic diagram of the structure of the adjusting member of the connection structure provided in the embodiments of this application;
[0027] Figure 3 This is a schematic diagram of the end plate of the connection structure provided in the embodiments of this application;
[0028] Figure 4 This is a schematic diagram of the limiting component of the connection structure provided in the embodiments of this application;
[0029] Figure 5 A bottom view of the limiting component of the connection structure provided in the embodiments of this application;
[0030] Figure 6 This is a schematic diagram of the connection between the two connection structures of the battery pack provided in an embodiment of this application.
[0031] Figure Labels
[0032] 10. End plate; 101. Accommodation space; 102. Limiting assembly; 1021. First connector; 1022. First limiting body; 1023. Second connector; 1024. Second limiting body; 103. Limiting hole; 104. First gap; 105. Second gap; 20. Adjusting component; 201. First adjusting body; 202. Second adjusting body; 30. First output stage; 40. First bolt; 50. Second output stage; 60. Second bolt; 70. Copper busbar. Detailed Implementation
[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0034] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0035] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0036] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0037] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.
[0038] Example
[0039] Currently, two adjacent modules in a battery pack are typically electrically connected via copper busbars. If, due to manufacturing tolerances, the two adjacent output stage bases are not at the same height in the Z-direction (vertical direction), the copper busbar bolts may not be tightened sufficiently, the required torque may not be achieved, and the contact area between the output stage and the copper busbar may be insufficient, leading to excessive temperature rise and potential safety hazards. A commonly used and effective technique is to manufacture the hard copper busbar as a soft copper busbar at shorter distances, using the deformation of the soft copper busbar to absorb any potential tolerances. In other words, when the distance between the two output stage bases is less than a certain dimension, the designed soft copper busbar is also shorter, increasing the manufacturing difficulty. When the two output stage bases are not at the same height in the Z-direction, the dimensional deformation of the shorter soft copper busbar is insufficient to absorb the tolerances in the Z-direction, again resulting in insufficient bolt torque, incomplete contact between the copper busbar and the output stage, and abnormally high temperature rise, posing a safety hazard.
[0040] In view of this, such as Figures 1-5 As shown, in a first aspect, embodiments of this application provide a connection structure, including: an end plate 10, which is configured with a receiving space 101; and an adjusting member 20, which is configured in the receiving space 101, wherein the outer edge dimension of the adjusting member 20 is smaller than the dimension of the receiving space 101, so that the adjusting member 20 can move relative to the receiving space 101 in at least one direction.
[0041] For example, the adjusting member 20 is configured to be distributed along a first direction, which includes but is not limited to the up and down direction. The adjusting member 20 is assembled within the receiving space 101 of the end plate 10, and the adjusting member 20 can move freely relative to the receiving space 101 at least along the first direction. Of course, in order to improve the safety after the product is connected, the adjusting member 20 can also move freely relative to the receiving space 101 along a second direction, which is perpendicular to the first direction. The second direction can be a left-right direction or a front-back direction.
[0042] In the technical solution of this application embodiment, an adjustment member 20 is provided in the accommodating space 101 of the end plate 10. The size of the adjustment member 20 is smaller than the size of the accommodating space 101, so that when the two connecting structures are connected, the movement of the adjustment member 20 can absorb the poor meshing caused by the height inconsistency due to tolerance, achieve proper contact, avoid abnormal temperature rise, and thus improve safety.
[0043] like Figure 4 As shown, the end plate 10 is equipped with a limiting component 102, which is disposed in the receiving space 101 and used to limit the adjustment member 20. It can be understood that when the adjustment member 20 moves freely along the first direction, the limiting component 102 is configured to be distributed along the first direction, and the upper end of the adjustment member 20 is used to limit it against the end plate 10, and the lower end of the adjustment member 20 is used to limit it against the limiting component 102, thereby preventing the adjustment member 20 from falling out of the receiving space 101.
[0044] In the technical solution of this application embodiment, a limiting component 102 is also provided in the accommodating space 101 of the end plate 10. Through the function of the limiting component 102, not only can the adjustment component 20 be limited, but also the adjustment component 20 can be adjusted relative to the accommodating space 101, which is beneficial to absorb the poor meshing situation caused by the height inconsistency due to tolerance.
[0045] In some embodiments, the limiting component 102 includes a first limiting member, the first limiting member including a first connecting body 1021 and a first limiting body 1022, the first connecting body 1021 being connected to the end plate 10, and the first limiting body 1022 being connected to the first connecting body 1021, wherein one end of the adjusting member 20 is limited by the end plate 10, and the other end is limited by the first limiting body 1022.
[0046] For example, the first connecting body 1021 is fixedly connected to the first limiting body 1022, and the connection method includes, but is not limited to, integral molding. After the first connecting body 1021 and the first limiting body 1022 are connected, the first limiting member can be a wedge-shaped snap-on type. It should be noted that after the two connecting structures are adjusted and connected by the adjusting member 20, there is a certain gap between the bottom of the first limiting body 1022 and the adjusting member 20.
[0047] In the technical solution of this application embodiment, the first limiting body 1022 is connected to the first connecting body 1021, and the first limiting body 1022 can limit the adjusting member 20 so that the adjusting member 20 will not fall off when it moves freely in the accommodating space 101, which is beneficial to the connection between the two connecting structures.
[0048] In some embodiments, the limiting component 102 further includes a second limiting member. The first limiting member and the second limiting member are disposed on opposite sides of the adjusting member 20. The second limiting member includes a second connecting body 1023 and a second limiting body 1024. The second connecting body 1023 is connected to the end plate 10, and the second limiting body 1024 is connected to the second connecting body 1023. The second connecting body 1023 is used to limit the adjusting member 20.
[0049] It is understood that the second limiting member and the first limiting member are distributed on opposite sides of the adjusting member 20, and the structure of the second limiting member and the structure of the first limiting member can be set to be the same, which will not be described in detail here.
[0050] In the technical solution of this application embodiment, the second limiting body 1024 is connected to the second connecting body 1023. The adjusting member 20 is limited to the accommodating space 101 by the cooperation of the first limiting body 1022 and the second limiting body 1024, so as to ensure that the adjusting member 20 can move freely in the accommodating space 101, thereby realizing the connection between connection structures with different tolerance problems.
[0051] In some embodiments, both the first limiting body 1022 and the second limiting body 1024 are provided with the first gap 104 along with the adjusting member 20. The first gap 104 is configured to allow movement of the adjusting member 20. This first gap 104 facilitates free movement of the adjusting member 20 within the accommodating space 101, which is beneficial for subsequent interconnection of the connecting structures.
[0052] In some embodiments, a second gap 105 is provided between the limiting component 102 and the receiving space 101. The second gap 105 is configured to accommodate the deformation of the limiting component 102. For example, after the limiting component 102 is disposed in the receiving space 101, the second gap 105 exists between the limiting component 102 and the sidewall of the receiving space 101. By providing the second gap 105, it is convenient to assemble the adjusting member 20 into the receiving space 101, and it is also convenient to replace the adjusting member 20.
[0053] like Figure 2 As shown, the adjusting member 20 includes a first adjusting body 201 and a second adjusting body 202. The first adjusting body 201 is connected to the second adjusting body 202. The first adjusting body 201 and the second adjusting body 202 are integrally formed, and the cross-sectional dimension of the first adjusting body 201 is larger than the cross-sectional dimension of the second adjusting body 202.
[0054] For example, the adjusting member 20 includes, but is not limited to, a non-standard nut; the first adjusting body 201 is formed, but is not limited to, a rectangle; and the first adjusting body 201 is chamfered to avoid damaging the limiting component 102 during installation; the second adjusting body 202 includes, but is not limited to, a cylinder; the second adjusting body 202 is located at the upper end of the first adjusting body 201 and is used to adapt to the end plate 10.
[0055] In the technical solution of this application embodiment, the first adjusting body 201 is connected to the second adjusting body 202, and the cross-sectional dimensions of the first adjusting body 201 and the second adjusting body 202 are set to be different, which can facilitate the limiting of the adjusting member 20 by the end plate 10 when the connecting structure is connected.
[0056] like Figure 4 As shown, the end plate 10 is provided with a limiting hole 103, which is configured to accommodate a portion of the structure of the adjusting member 20, and the second adjusting body 202 of the adjusting member 20 is adapted to the limiting hole 103. This limiting hole 103 can be used to limit the adjusting member 20 when two connection structures are used, ensuring stability after connection and improving safety.
[0057] like Figure 6 In a second aspect, this application also provides a battery pack, comprising: a conductive structure and a connection structure as described above, wherein an adjustment member 20 of the connection structure is connected to the conductive structure.
[0058] For example, the battery pack is provided with a plurality of battery modules, which can be connected in series or other ways, and the connection structure serves as a component of the battery modules, and the conductive structure is used to realize the series connection of two battery modules, etc.
[0059] In the technical solution of this application embodiment, the adjusting member 20 of the conductive structure connects the connecting structure, which can realize the connection between the two connecting structures. At the same time, since the adjusting member 20 can move freely within the end plate 10, it can absorb the problem of inconsistent height at both ends of the conductive structure after connection due to tolerance, thus improving safety.
[0060] In some embodiments, the connection structure is configured with a plurality of conductive structures for connecting two adjacent connection structures, wherein the conductive structure includes a first conductive component and a second conductive component, the first conductive component is configured in one connection structure, the second conductive component is configured in another connection structure, and the first conductive component is connected to the second conductive component.
[0061] For example, the first conductor assembly and the second conductive assembly are connected via a copper busbar 70. The first conductive assembly includes a first output stage 30 and a first bolt 40. The first bolt 40 passes through the copper busbar 70 and the first output stage 30 and is threadedly connected to the adjusting member 20 in the connection structure. The second conductive assembly includes a second output stage 50 and a second bolt 60. The second bolt 60 passes through the copper busbar 70 and the second output stage 50 and is threadedly connected to the adjusting member 20 in the connection structure, thereby realizing the series connection between two adjacent battery modules.
[0062] In the technical solution of this application embodiment, two adjacent connection structures can be connected by the first conductive component and the second conductive component. Under the free movement of the adjusting member 20, the height inconsistency problem caused by tolerance issues can be avoided, thereby improving the safety after connection.
[0063] In all embodiments of this application, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.
[0064] It should be understood that the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.
[0065] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0066] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.
Claims
1. A connection structure characterized by comprising: include: End plate, which is configured with a receiving space; An adjusting member is disposed in the receiving space, the outer edge dimension of the adjusting member being smaller than the dimension of the receiving space, such that the adjusting member can move relative to the receiving space in at least one direction.
2. The connection structure according to claim 1, characterized in that The end plate is equipped with a limiting component, which is disposed in the receiving space and is used to limit the adjustment component.
3. The connection structure according to claim 2, characterized in that The limiting component includes a first limiting member, which includes a first connecting body and a first limiting body. The first connecting body is connected to the end plate, and the first limiting body is connected to the first connecting body. One end of the adjusting member is limited by the end plate, and the other end is limited by the first limiting body.
4. The connection structure according to claim 3, characterized in that The limiting component further includes a second limiting member. The first limiting member and the second limiting member are disposed on opposite sides of the adjusting member. The second limiting member includes a second connecting body and a second limiting body. The second connecting body is connected to the end plate, and the second limiting body is connected to the second connecting body. The second connecting body is used to limit the adjusting member.
5. The connection structure according to claim 4, characterized in that, Both the first limiting body and the second limiting body are provided with a first gap from the adjusting member, and the first gap is configured to allow movement of the adjusting member.
6. The connecting structure according to claim 2 or 5, characterized by The limiting component and the receiving space are provided with a second gap, the second gap being configured to accommodate deformation of the limiting component.
7. The connection structure according to claim 1, wherein The adjusting member includes a first adjusting body and a second adjusting body, the first adjusting body being connected to the second adjusting body, and the cross-sectional dimension of the first adjusting body being larger than the cross-sectional dimension of the second adjusting body.
8. The connection structure according to claim 1 or 7, characterized by The end plate is provided with a limiting hole, which is configured to accommodate a portion of the adjusting member.
9. A battery pack, characterized by, include: Conductive structure, and The connection structure as described in any one of claims 1-8, wherein the adjusting member of the connection structure is connected to the conductive structure.
10. The battery pack of claim 9, wherein, The connection structure is configured with a plurality of such structures, and the conductive structure is used to connect two adjacent connection structures. The conductive structure includes a first conductive component and a second conductive component. The first conductive component is configured in one connection structure, and the second conductive component is configured in another connection structure. The first conductive component is connected to the second conductive component.