Copper bar structure and battery pack

Abstract

The utility model provides a copper bar structure and a battery pack, the copper bar structure comprises a copper bar body and a connecting structure, the connecting structure comprises a connecting piece and a fixing piece, and the connecting piece is sleeved on the copper bar body; wherein the connecting piece has a first state in which the connecting piece is fixed with the copper bar body and a second state in which the connecting piece can move along the extension direction of the copper bar body after being unfixed with the copper bar body, and the fixing piece is arranged on the connecting piece. The fixing piece is configured to fix the copper bar body when the connecting piece is in the first state. In the embodiment of the utility model, the copper bar body is fixed in the battery pack through the movable adjustment and fastening of the connecting piece and the fixed fastening of the fixing piece; the movable adjusting arrangement of the connecting piece can avoid the problem that the copper bar body is not easy to install and fix in the battery pack due to the accumulation of installation tolerance.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a copper busbar structure and a battery pack. Background Art

[0002] In the related art, when the copper busbar is connected over a long distance, since the copper busbar has a certain length, when the copper busbar is installed and fixed to the structure inside the battery pack, the fixing points on the copper busbar and the mounting holes in the battery pack may not be aligned due to the accumulated tolerances, resulting in the copper busbar being difficult to install and fix in the battery pack. Utility Model Content

[0003] The embodiments of the utility model provide a copper busbar structure and a battery pack, which can improve the problem in the related art that the copper busbar is long, so that the fixing points on the copper busbar and the mounting holes in the battery pack cannot be aligned, making it difficult to install and fix the copper busbar in the battery pack.

[0004] In a first aspect, an embodiment of the present utility model provides a copper busbar structure, comprising:

[0005] The copper busbar body; and

[0006] The connection structure comprises a connection piece and a fixing piece, wherein the connection piece is sleeved on the copper busbar body;

[0007] The connecting piece has a first state in which it is fixed to the copper busbar body and a second state in which it can move along the extension direction of the copper busbar body after being released from the copper busbar body. The fixing piece is arranged on the connecting piece, and the fixing piece is configured to fix the copper busbar body when the connecting piece is in the first state.

[0008] In one embodiment, the fixing member includes a first sub-portion and a second sub-portion, the first sub-portion is connected to the connecting member, the second sub-portion is arranged in a columnar shape, and one end of the second sub-portion is connected to the first sub-portion;

[0009] The fixing member further comprises a plurality of clamping portions, and the plurality of clamping portions are arranged on the peripheral side surface of the second sub-portion at intervals along the axial direction of the second sub-portion.

[0010] In one embodiment, in the axial direction of the second sub-portion, the thickness of each of the clamping portions in the radial direction of the second sub-portion gradually decreases.

[0011] In one embodiment, each of the clamping portions includes a first surface and a second surface that are connected to each other, the first surface and the peripheral side surface of the second sub-portion are vertically connected to each other, the second surface is connected to the peripheral side surface of the second sub-portion, and the second surface is inclined relative to the first surface and the peripheral side surface of the second sub-portion.

[0012] In one embodiment, the clamping portion includes a first sub-clamping portion and a second sub-clamping portion, and the first sub-clamping portion and the second sub-clamping portion are arranged opposite to each other in a radial direction of the second sub-portion and are spaced from each other;

[0013] A plurality of the first sub-clamping portions are arranged in an axial direction of the second sub-portion at intervals, and a plurality of the second sub-clamping portions are arranged in an axial direction of the second sub-portion at intervals.

[0014] In one embodiment, the fixing member further comprises a third sub-section, wherein the third sub-section connects the first sub-section and the second sub-section;

[0015] In the radial direction of the second sub-portion, a cross-sectional area of ​​the third sub-portion is larger than a cross-sectional area of ​​the second sub-portion.

[0016] In one embodiment, the connecting member is arranged in a ring shape to enclose a cavity, and the area of ​​the cavity is adjustable;

[0017] The copper busbar body is correspondingly penetrated by the cavity.

[0018] In one embodiment, a through hole is provided on the first sub-section, the connecting member passes through the through hole, and at least a part of the first sub-section is located in the cavity.

[0019] In one embodiment, the copper bar body includes a first copper bar and a second copper bar connected to each other, and the rigidity of the first copper bar is greater than the rigidity of the second copper bar.

[0020] In one embodiment, the second copper busbar includes a plurality of stacked copper foils.

[0021] In one embodiment, at least parts of the first copper bar and the second copper bar overlap.

[0022] In one embodiment, the copper busbar structure further includes an insulating member attached to the outer surface of the copper busbar body.

[0023] In one embodiment, first mounting holes are formed at both ends of the copper busbar body.

[0024] In a second aspect, an embodiment of the present utility model provides a battery pack, comprising:

[0025] at least two battery modules; and,

[0026] Copper busbar structure, the copper busbar body connects the two battery modules.

[0027] In one embodiment, the battery pack further includes a box body, and a second mounting hole is provided on the box body and / or the battery module, and at least a portion of the fixing member is fastened in the second mounting hole.

[0028] Beneficial effects of the embodiments of the utility model:

[0029] In an embodiment of the utility model, by making the connecting member in the second state, the connecting member is movable so that the fixing member can be opposite to the mounting hole of the battery pack, and the connecting member is set in the first state, the fixing between the connecting member and the copper busbar body is completed, and the fixing member is fixed to the mounting hole at the same time to complete the fixation of the fixing member, that is, the copper busbar body is fixed in the battery pack through the movable adjustment and tightening of the connecting member and the fixed tightening of the fixing member. The movable adjustment setting of the connecting member can avoid the problem that the copper busbar body is difficult to install and fix in the battery pack due to the accumulation of installation tolerances. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a three-dimensional schematic diagram of a copper busbar structure provided by an embodiment of the utility model;

[0032] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0033] Figure 3 It is a cross-sectional schematic diagram of a copper busbar structure provided by an embodiment of the utility model;

[0034] Figure 4 yes Figure 3 The enlarged schematic diagram of point B in the middle;

[0035] Figure 5 It is a three-dimensional schematic diagram of a copper busbar structure provided by an embodiment of the utility model;

[0036] Figure 6 yes Figure 5 Enlarged schematic diagram of point C in the middle.

[0037] Reference numerals:

[0038] 100. Copper busbar structure; 1. Copper busbar body; 2. Connection structure; 21. Connector; 22. Fixing member; 221. First sub-section; 222. Second sub-section; 223. Clamping portion; 223A. First surface; 223B. Second surface; 224. Third sub-section; 3. Through hole; 11. First copper busbar; 12. Second copper busbar; 4. Insulating member; 5. First mounting hole; 6. Cavity; 7. Through groove; 8. Peripheral side surface; 2231. First sub-clamping portion; 2232. Second sub-clamping portion. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0040] In the related art, when the copper busbar is connected over a long distance, since the copper busbar has a certain length, when the copper busbar is installed and fixed to the structure inside the battery pack, the fixing points on the copper busbar and the mounting holes in the battery pack may not be aligned due to the accumulated tolerances, resulting in the copper busbar being difficult to install and fix in the battery pack.

[0041] In view of this, the utility model proposes a copper busbar structure. Figures 1 to 6 This is an embodiment of the present utility model.

[0042] See also Figure 1 to Figure 2 as well as Figures 5 and 6 The copper busbar structure 100 includes a copper busbar body 1 and a connection structure 2, wherein the connection structure 2 includes a connector 21 and a fixing member 22, wherein the connector 21 is sleeved on the copper busbar body 1; wherein the connector 21 has a first state in which it is fixed to the copper busbar body 1 and a second state in which it can move along the extension direction of the copper busbar body 1 after being released from the copper busbar body 1, wherein the fixing member 22 is disposed on the connector 21, and wherein the fixing member 22 is configured to fix the copper busbar body 1 when the connector 21 is in the first state.

[0043] In an embodiment of the utility model, by making the connecting member 21 in the second state, the connecting member 21 is movable so that the fixing member 22 can be opposite to the mounting hole of the battery pack, and the connecting member 21 is set in the first state, the fixing between the connecting member 21 and the copper busbar body 1 is completed, and the fixing member 22 is fixed to the mounting hole to complete the fixation of the fixing member 22, that is, the copper busbar body 1 is fixed in the battery pack through the movable adjustment and fastening of the connecting member 21 and the fixed fastening of the fixing member 22. The movable adjustment setting of the connecting member 21 can avoid the problem that the copper busbar body 1 is difficult to install and fix in the battery pack due to the accumulation of installation tolerances.

[0044] Further, the fixing member 22 includes a first sub-portion 221 and a second sub-portion 222, wherein the first sub-portion 221 is connected to the connecting member 21, and the second sub-portion 222 is arranged in a columnar shape, and one end of the second sub-portion 222 is connected to the first sub-portion 221; the fixing member 22 also includes a plurality of clamping portions 223, and the plurality of clamping portions 223 are arranged on the peripheral side surface 8 of the second sub-portion 222 at intervals along the axial direction of the second sub-portion 222. That is, in this embodiment, the second sub-portion 222 arranged in a columnar shape is inserted into the mounting hole of the battery pack, thereby increasing the depth volume of the fixing member 22 in the mounting hole, and at the same time, the plurality of clamping portions 223 located on the peripheral side surface 8 of the second sub-portion 222 can fasten the second sub-portion 222 in the mounting hole, thereby completing the fixed position limiting of the second sub-portion 222. It can be understood that the fastening form between the clamping portion 223 and the mounting hole of the battery pack is not limited, and can be an interference fit relationship or a clamping position limiting relationship.

[0045] It should be added that, since the second sub-section 222 is arranged in a columnar shape, specifically the main part of the second sub-section 222 is cylindrical, the second sub-section 222 has axial, radial and circumferential characteristics; therefore, this orientation feature is used for description in the above embodiment and the following text.

[0046] Specifically, in one embodiment of the present application, in the axial direction of the second sub-section 222, the thickness of each of the clamping portions 223 in the radial direction of the second sub-section 222 gradually decreases. That is, when the second sub-section 222 is inserted into the mounting hole of the battery pack, the portion of the clamping portion 223 with a smaller thickness first enters the mounting hole so as not to affect the insertion of the second sub-section 222, and the clamping portion 223 with such a structure can play a certain guiding role when the second sub-section 222 is inserted. In the process of the second sub-section 222 escaping from the mounting hole of the battery pack, the clamping portion 223 acts as a limit between the thicker portion of the second sub-section 222 in the radial direction and the hole wall of the mounting hole, thereby preventing the second sub-section 222 from escaping from the mounting hole.

[0047] Further, see Figure 4 Each of the clamping portions 223 includes a first surface 223A and a second surface 223B connected to each other, the first surface 223A and the peripheral side surface 8 of the second sub-portion 222 are vertically connected to each other, the second surface 223B is connected to the peripheral side surface 8 of the second sub-portion 222, and the second surface 223B is inclined relative to the first surface 223A and the peripheral side surface 8 of the second sub-portion 222. In this embodiment, the second surface 223B can play a guiding role when the second sub-portion 222 is installed in the installation hole, so as not to affect the clamping portion 223 entering the installation hole, and the first surface 223A can play a limiting role to prevent the second sub-portion 222 from escaping from the installation hole.

[0048] See also Figure 2 and Figure 6The clamping part 223 includes a first sub-clamping part 2231 and a second sub-clamping part 2232. The first sub-clamping part 2231 and the second sub-clamping part 2232 are arranged opposite to each other in the radial direction of the second sub-part 222 and are spaced from each other. A plurality of the first sub-clamping parts 2231 are arranged at intervals in the axial direction of the second sub-part 222, and a plurality of the second sub-clamping parts 2232 are arranged at intervals in the axial direction of the second sub-part 222. The first sub-clamping part 2231 and the second sub-clamping part 2232 on one of the clamping parts 223 are arranged at intervals, and two through grooves 7 are formed between the first sub-clamping part 2231 and the second sub-clamping part 2232. The plurality of the first sub-clamping parts 2231 and the plurality of the second sub-clamping parts 2232 are arranged at intervals in the axial direction of the second sub-part 222, so that the through grooves 7 on the plurality of the clamping parts 223 can be arranged opposite to each other in the axial direction of the second sub-part 222. On this basis, when the second sub-section 222 is installed in the installation hole, the air in the installation hole can be discharged along the multiple through grooves 7, so that it is more convenient for operators to perform installation.

[0049] It is understandable that if the air in the mounting hole cannot be discharged when the second sub-section 222 is installed in the mounting hole, since the second sub-section 222 occupies a certain space in the mounting hole, the air in the mounting hole is compressed, thereby causing the air pressure in the remaining space in the mounting hole to increase, thereby providing a force to push the second sub-section 222 out of the mounting hole, which not only makes it difficult for the operator to install the second sub-section 222, but may also cause the second sub-section 222 to be installed insecurely.

[0050] In the above embodiment, in order to make the clamping portion 223 located on the peripheral side of the second sub-portion 222 more adaptable to the hole shape of the installation hole in the battery pack, the first sub-clamping portion 2231 and the second sub-clamping portion 2232 are arranged around the second sub-portion 222 in the circumferential direction of the second sub-portion 222.

[0051] In some embodiments, the fixing member 22 further includes a third sub-portion 224, which connects the first sub-portion 221 and the second sub-portion 222; in the radial direction of the second sub-portion 222, the cross-sectional area of ​​the third sub-portion 224 is greater than the cross-sectional area of ​​the second sub-portion 222. That is, in this embodiment, after the second sub-portion 222 is inserted into the mounting hole of the battery pack, the third sub-portion 224 can cover the opening of the mounting hole, thereby protecting the internal structure of the mounting hole. In addition, combined with the embodiment described above in which a part of the clamping portion 223 and another part of the plurality of clamping portions 223 are arranged oppositely in the axial direction of the second sub-portion 222, after the clamping portion 223 is installed in the mounting hole, the third sub-portion 224 provided in this embodiment is in contact with the surface of the component with the mounting hole, thereby forming a negative pressure environment, thereby ensuring the reliability of the fixing member 22 installed at the mounting hole.

[0052] See also Figure 2 and Figure 6 , the connector 21 is arranged in a ring shape to enclose a cavity 6, and the area of ​​the cavity 6 is adjustable; the copper busbar body 1 is correspondingly provided with the cavity 6. In this embodiment, by adjusting the area of ​​the cavity 6 enclosed by the connector 21, the connector 21 is switched between the first state and the second state. It can be understood that when the connector 21 is in the first state, the connector 21 is attached to the outer surface of the copper busbar body 1, so as to achieve the fixation of the connector 21 and the copper busbar body 1. When the connector 21 is in the second state, there is a certain gap between the connector 21 and the copper busbar body 1, so that the connector 21 can move along the copper busbar body 1. Among them, the adjustable form of the connector 21 is not limited, and it can be elastic adjustment or length adjustment. That is, the structural form of the connector 21 is not limited, and it can be an elastic rope or a cable tie.

[0053] Further, the first sub-portion 221 is provided with a through hole 3, the connecting member 21 passes through the through hole 3, and at least a portion of the first sub-portion 221 is located in the cavity 6. That is, by providing the connecting member 21 passing through the through hole 3 and sleeved on the copper busbar body 1, the copper busbar body 1, the connecting member 21 and the fixing member 22 are installed.

[0054] See also Figure 1 , Figure 3 and Figure 5The copper bar body 1 includes a first copper bar 11 and a second copper bar 12 connected to each other, and the stiffness of the first copper bar 11 is greater than the stiffness of the second copper bar 12. Among them, two first copper bars 11 and second copper bars 12 with different stiffness are selected. The second copper bar 12 with smaller stiffness can satisfy the current capacity of the copper bar body 1. Since it has a certain deformation space, it can be adjusted to a certain extent to reduce the installation tolerance of the copper bar body 1, and then cooperate with the connecting piece 21, so that the fixing piece 22 is adapted to the installation hole position of the battery pack.

[0055] Specifically, the material of the first copper bar 11 is mainly T2 copper, which is formed by stamping and bending T2 copper plate, which can meet the flow capacity of the copper bar body 1 and reduce the production cost of the copper bar body 1. The material of the second copper bar 12 is mainly 0.2 mm T2 copper foil, which is stacked by multiple layers of copper foil, which can meet the flow capacity of the copper bar body 1 and compensate for the installation tolerance of the copper bar body 1 to a certain extent through shape adjustment.

[0056] In addition, at least part of the first copper bar 11 and the second copper bar 12 overlap. The overlapping part of the first copper bar 11 and the second copper bar 12 is the welding part of the first copper bar 11 and the second copper bar 12, and the first copper bar 11 and the second copper bar 12 are welded together by polymer diffusion welding, and the welding area can also meet the flow capacity of the copper bar body 1.

[0057] See also Figure 3 to Figure 4 The copper bar structure 100 further includes an insulating member 4 attached to the outer surface of the copper bar body 1. The insulating member 4 is provided to insulate and protect the copper bar body 1. The insulating member 4 is not limited in the form of being provided, and can be provided by a heat shrink sleeve or by being formed by plastic dipping on the outer surface of the copper bar body 1.

[0058] See also Figure 1 , Figure 3 and Figure 5 The copper busbar body 1 is provided with first mounting holes 5 at both ends thereof. The copper busbar body 1 is connected to the two battery modules through the first mounting holes 5 at both ends thereof.

[0059] The utility model also provides a battery pack, which includes at least two battery modules and a copper busbar structure 100, wherein the copper busbar body 1 connects the two battery modules. The copper busbar structure 100 is as described above. Since the battery pack adopts all the technical solutions of all the above embodiments, it has at least the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0060] Furthermore, the battery pack further comprises a box, and a second mounting hole is provided on the box and / or the battery module, and at least a portion of the fixing member 22 is fastened in the second mounting hole. The second mounting hole opposite to the fixing member 22 may be provided on the box, or on the battery module, or on other components of the battery pack, and no limitation is made here. It is understood that the second mounting hole is the mounting hole position of the battery pack described above.

[0061] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A copper busbar structure, characterized in that: include: Copper bus body; as well as, The connection structure comprises a connection piece and a fixing piece, wherein the connection piece is sleeved on the copper busbar body; The connecting piece has a first state in which it is fixed to the copper busbar body and a second state in which it can move along the extension direction of the copper busbar body after being released from the copper busbar body. The fixing piece is arranged on the connecting piece, and the fixing piece is configured to fix the copper busbar body when the connecting piece is in the first state.

2. The copper busbar structure according to claim 1, characterized in that: The fixing member includes a first sub-part and a second sub-part, the first sub-part is connected to the connecting member, the second sub-part is arranged in a columnar shape, and one end of the second sub-part is connected to the first sub-part; The fixing member further comprises a plurality of clamping portions, and the plurality of clamping portions are arranged on the peripheral side surface of the second sub-portion at intervals along the axial direction of the second sub-portion.

3. The copper busbar structure according to claim 2, characterized in that: In the axial direction of the second sub-portion, the thickness of each of the clamping portions in the radial direction of the second sub-portion gradually decreases.

4. The copper busbar structure according to claim 3, characterized in that: Each of the clamping parts includes a first surface and a second surface connected to each other, the first surface and the peripheral side surface of the second sub-part are vertically connected to each other, the second surface is connected to the peripheral side surface of the second sub-part, and the second surface is inclined relative to the first surface and the peripheral side surface of the second sub-part.

5. The copper busbar structure according to claim 2, characterized in that: The clamping portion includes a first sub-clamping portion and a second sub-clamping portion, wherein the first sub-clamping portion and the second sub-clamping portion are arranged opposite to each other in the radial direction of the second sub-portion and are spaced from each other; A plurality of the first sub-clamping portions are arranged in an axial direction of the second sub-portion at intervals, and a plurality of the second sub-clamping portions are arranged in an axial direction of the second sub-portion at intervals.

6. The copper busbar structure according to claim 2, characterized in that: The fixing member further comprises a third sub-section, wherein the third sub-section connects the first sub-section and the second sub-section; In the radial direction of the second sub-portion, a cross-sectional area of ​​the third sub-portion is larger than a cross-sectional area of ​​the second sub-portion.

7. The copper busbar structure according to claim 2, characterized in that: The connecting piece is arranged in a ring shape to enclose a cavity, and the area of ​​the cavity is adjustable; The copper busbar body is correspondingly penetrated by the cavity.

8. The copper busbar structure according to claim 7, characterized in that: The first sub-section is provided with a through hole, the connecting member passes through the through hole, and at least a part of the first sub-section is located in the cavity.

9. The copper busbar structure according to any one of claims 1 to 8, characterized in that: The copper bar body comprises a first copper bar and a second copper bar connected to each other, and the rigidity of the first copper bar is greater than the rigidity of the second copper bar.

10. The copper busbar structure according to claim 9, characterized in that: The second copper busbar includes a plurality of copper foils stacked together.

11. The copper busbar structure according to claim 9, characterized in that: At least parts of the first copper bar and the second copper bar overlap.

12. The copper busbar structure according to any one of claims 1 to 8, characterized in that: The copper busbar structure further includes an insulating member attached to the outer surface of the copper busbar body.

13. The copper busbar structure according to any one of claims 1 to 8, characterized in that: Both ends of the copper busbar body are provided with first mounting holes.

14. A battery pack, characterized in that: include: At least two battery modules; as well as, The copper busbar structure according to any one of claims 1 to 13, wherein the copper busbar body connects two of the battery modules.

15. The battery pack according to claim 14, characterized in that: The battery pack further comprises a box body, and a second mounting hole is provided on the box body and / or the battery module, and at least a portion of the fixing member is fastened in the second mounting hole.

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