Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment, and the battery pack comprises a battery pack which is formed by stacking a plurality of single batteries; the battery monomer comprises a pole; the integrated busbar body is arranged on one side, from which the pole is led out, of the single battery; the integrated busbar body is provided with a positioning hole; the positioning structure is arranged on the side, facing the battery pack, of the integrated busbar body, the positioning structure comprises a body part and a positioning column, the body part is fixedly connected with a pole of any single battery, the positioning column is formed by extending the body part towards the side close to the integrated busbar body, and the positioning column penetrates through the positioning hole; therefore, the relative position of the integrated busbar body and the battery pack is positioned. According to the battery pack provided by the utility model, the accurate positioning of the integrated busbar body and the battery pack can be realized, the accurate welding is ensured, the contact with other circuit elements caused by the deviation of the assembly positions of the integrated busbar body and the battery pack is avoided, and the short circuit is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery pack and electrical equipment. BACKGROUND

[0002] In the energy storage field, CCS busbar (Cells Contact System) is also called integrated busbar. The tab sheet, as an important component of the CCS busbar, can realize the series and parallel connection between the battery monomers by welding the tab sheet and the pole of the battery monomer, so as to collect the current generated by the battery and transmit it to the external circuit.

[0003] The tab sheet needs to select the size and specification matched with the CCS busbar. However, the CCS busbar itself has installation tolerance, and the battery pack has deviation in the box, which may cause the CCS busbar and the pole in the battery pack to be unable to be installed in position, thereby affecting the welding of the whole battery pack and causing poor welding such as explosive welding, virtual welding, and offset welding, and even causing the whole pack to be scrapped in a serious case. SUMMARY

[0004] Therefore, the utility model provides a battery pack and electrical equipment to solve the problem that the CCS busbar and the pole in the battery pack cannot be installed in position due to the size deviation and the like.

[0005] In a first aspect, the utility model provides a battery pack, which comprises:

[0006] The battery pack is stacked by a plurality of battery monomers, and the battery monomer comprises a pole;

[0007] The integrated busbar body is arranged on the side of the battery monomer from which the pole is led out, and the integrated busbar body is provided with a positioning hole;

[0008] The positioning structure is arranged on the side of the integrated busbar body facing the battery pack, and the positioning structure comprises a body part and a positioning column, the body part is fixedly connected with the pole of any battery monomer, the positioning column is formed by extending from the body part to the side close to the integrated busbar body, and the positioning column is arranged in the positioning hole to position the relative position of the integrated busbar body and the battery pack.

[0009] Advantages: the battery pack provided by the embodiment of the utility model has the positioning hole in the integrated busbar body, and the body part of the positioning structure is fixedly connected with the pole of any battery monomer, the positioning column is formed by extending from the body part to the side close to the integrated busbar body, and the positioning column is arranged in the positioning hole to position the relative position of the integrated busbar body and the battery pack. Therefore, the integrated busbar body and the battery pack can be accurately positioned to ensure the welding accuracy, the assembly position of the integrated busbar body and the battery pack is prevented from deviating to cause contact with other circuit elements, and short circuit is prevented.

[0010] In one alternative implementation, the positioning structure further includes:

[0011] An assembly part is provided on the main body part. The assembly part is fitted onto the outer periphery of the pole post, and the shape of the assembly part matches the outer periphery of the pole post.

[0012] Beneficial effects: The positioning structure has an assembly part. By setting the assembly part to match the outer circumference shape of the pole post, the positioning structure and the pole post can be engaged after the assembly part is fitted onto the outer circumference of the pole post. This prevents the positioning structure from shaking and avoids the positioning structure from falling off the pole post, thus facilitating the subsequent assembly of the positioning structure with the positioning holes of the integrated busbar body.

[0013] In one alternative implementation, the surface on which the battery cell leads out with the terminal post is defined as the first surface;

[0014] The battery pack also includes: a conductive sheet, which is fixedly connected to the surface of the terminal post away from the first surface; in a direction perpendicular to the first surface, the area enclosed by the assembly part is within the projection range of the conductive sheet.

[0015] In one alternative implementation, the thickness of the body portion is less than or equal to the height of the pole protruding from the first surface.

[0016] Beneficial effects: The thickness of the main body of the positioning structure is less than or equal to the height of the pole protruding from the first surface. By placing the positioning structure in the area between the conductive sheet and the first surface of the battery cell, interference with the welding of the conductive sheet and the pole is avoided. It can also make reasonable use of space, avoid occupying extra space in the battery pack, ensure space utilization, and effectively guarantee energy density.

[0017] In one alternative embodiment, the positioning post protrudes from the side of the body portion opposite to the first surface;

[0018] In the direction perpendicular to the first surface, the projection of the conductive sheet does not overlap with the positioning post.

[0019] Beneficial effects: By ensuring that the projection of the conductive sheet does not overlap with the positioning post, the conductive sheet will not interfere with the assembly of the positioning post and the integrated busbar body, thus avoiding interference and ensuring the smooth assembly of the positioning post and the positioning hole.

[0020] In one alternative implementation, the positioning structure is an insulating element.

[0021] Beneficial effects: The positioning structure, made of insulating material, can prevent short circuits and improve safety performance while ensuring positioning and assembly requirements.

[0022] In one optional implementation, the number of positioning structures is M, and the integrated busbar body has N positioning holes, where N≥M, and N and M are both positive integers;

[0023] Each positioning structure is connected to a single battery cell.

[0024] Beneficial effects: When there are at least two positioning structures and at least two positioning holes are opened on the integrated busbar body, the positioning structure can be installed between the integrated busbar body and the battery pack to achieve precise positioning of the integrated busbar body and avoid shaking.

[0025] In one alternative implementation, the outer periphery of the pole is configured to be non-circular.

[0026] Beneficial effects: By constructing the outer periphery of the pole as non-circular and matching the outer periphery of the assembly part with the outer periphery of the pole, rotation of the positioning structure can be avoided after the assembly part is fitted onto the outer periphery of the pole, thus ensuring accurate positioning.

[0027] In one alternative implementation, the assembly part is clearance-fitted with the outer peripheral side of the pole post.

[0028] Beneficial effects: By rationally setting the maximum gap size between the assembly part and the outer periphery of the terminal post, the positioning accuracy is effectively controlled, ensuring the accurate positioning of the integrated busbar body. This provides a positioning constraint for the integrated busbar body, achieving precise positioning between the integrated busbar body and the battery pack, reducing deviations in the installation and fit of the conductive plates and terminal posts, ensuring precise welding, and preventing short circuits caused by conductive plate deviations.

[0029] Secondly, this utility model also provides an electrical device, including: a battery pack as described above.

[0030] Since electrical equipment includes a battery pack, which has the same effect as a battery pack, it will not be elaborated on here. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the battery pack of this utility model after the integrated busbar has been removed;

[0033] Figure 2 This is a top view of the battery pack of this utility model;

[0034] Figure 3 This is a front view of the battery cell and positioning structure in the assembled state of this utility model;

[0035] Figure 4 This is a top view of the battery cell and positioning structure of this utility model in their assembled state;

[0036] Figure 5 This is a three-dimensional schematic diagram of the positioning structure of this utility model;

[0037] Figure 6 This is a top view of the positioning structure of this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 100. Battery pack; 1. Battery cell; 11. Terminal; 12. First surface;

[0040] 2. Conductive sheet; 3. Positioning structure; 31. Main body; 32. Positioning post; 33. Assembly part;

[0041] 4. Integrated busbar body; 41. Positioning hole. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0046] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0047] According to an embodiment of the present invention, in one aspect, a battery pack is provided, comprising:

[0048] The battery pack 100 is composed of several battery cells 1 stacked together; the battery cell 1 includes a terminal post 11.

[0049] The integrated busbar body 4 is located on the side of the battery cell 1 where the terminal post 11 is led out; the integrated busbar body 4 has a positioning hole 41.

[0050] The positioning structure 3 is disposed on the side of the integrated busbar body 4 facing the battery pack 100. The positioning structure 3 includes a body part 31 and a positioning post 32. The body part 31 is fixedly connected to the terminal post 11 of any battery cell 1. The positioning post 32 is formed by extending from the body part 31 toward the side close to the integrated busbar body 4. The positioning post 32 passes through the positioning hole 41 to position the relative position of the integrated busbar body 4 and the battery pack 100.

[0051] The battery pack provided in this embodiment of the present invention features a positioning hole 41 in the integrated busbar body 4 and a positioning structure 3. The positioning structure 3 has its body 31 fixedly connected to the terminal post 11 of any battery cell 1. A positioning post 32 extends from the body 31 towards the side closest to the integrated busbar body 4 and passes through the positioning hole 41 to position the relative position of the integrated busbar body 4 and the battery pack 100. This ensures precise positioning of the integrated busbar body 4 and the battery pack, guaranteeing accurate welding and preventing contact with other circuit components due to misalignment of the assembly position of the integrated busbar body 4 and the battery pack, thus preventing short circuits.

[0052] In this embodiment, the positioning structure 3 is of standard size. Through reasonable size design, the positioning structure 3 is connected between the terminal post 11 of the battery cell 1 and the positioning hole 41 of the integrated busbar body 4, which plays a role in positioning and constraining the integrated busbar body 4. This facilitates assembly and positioning and avoids positional movement caused by accidental contact during the welding process.

[0053] In some embodiments, combined with Figure 4 , Figure 5 As shown, the positioning structure 3 also includes:

[0054] Assembly part 33 is provided on the main body part 31. Assembly part 33 is sleeved on the outer periphery of pole post 11, and the shape of assembly part 33 matches the outer periphery of pole post 11.

[0055] The positioning structure 3 has an assembly part 33. By setting the assembly part 33 to match the outer peripheral shape of the pole post 11, the positioning structure 3 can be engaged with the pole post 11 after the assembly part 33 is fitted onto the outer peripheral side of the pole post 11. This prevents the positioning structure 3 from shaking and avoids the positioning structure 3 from falling off the pole post 11, thus facilitating the subsequent assembly of the positioning structure 3 with the positioning hole 41 of the integrated busbar body 4.

[0056] In some embodiments, combined with Figure 4 As shown, the surface from which the terminal post 11 is led out of the battery cell 1 is defined as the first surface 12;

[0057] The battery pack also includes: a conductive sheet 2, which is fixedly connected to the surface of the terminal post 11 away from the first surface 12; in the direction perpendicular to the first surface 12, the area enclosed by the assembly part 33 is within the projection range of the conductive sheet 2.

[0058] The battery pack 100 of this embodiment is composed of a number of battery cells 1 stacked together. Each battery cell 1 includes a terminal post 11. After the battery pack 100 is assembled, the battery cells 1 are connected in series through conductive sheets 2.

[0059] The integrated busbar body 4 is positioned on the side of the battery cell 1 where the terminal post 11 is located; the conductive sheet 2 and the integrated busbar body 4 together form the CCS busbar. After the integrated busbar body 4 is laid flat on the side of the battery cell 1 where the terminal post 11 is located, if there is no positioning, the integrated busbar body 4 and the terminal post 11 may not be aligned during installation, which may lead to short circuits due to misalignment of the conductive sheet, and may also lead to poor welding due to misalignment of the installation fit between the conductive sheet 2 and the terminal post 11.

[0060] Since the conductive sheet 2 and the integrated busbar body 4 together form the CCS busbar, a positioning structure 3 is provided, in which the body 31 of the positioning structure 3 is fixedly connected to the terminal post 11 of any battery cell 1. The positioning post 32 extends from the body 31 toward the side closer to the integrated busbar body 4 and passes into the positioning hole 41 to position the relative position of the integrated busbar body 4 and the battery pack 100. This enables precise positioning of the integrated busbar body 4 and the battery pack 100, while reducing the deviation in the installation and fit of the conductive sheet 2 and the terminal post 11, ensuring accurate welding, and avoiding short circuits caused by deviation of the conductive sheet 2.

[0061] In some embodiments, combined with Figure 3 As shown, the thickness of the body portion 31 is less than or equal to the height of the pole post 11 protruding from the first surface 12.

[0062] Since the electrode post 11 is formed by the upward protrusion of the first surface 12 of the battery cell 1, the conductive sheet 2 is welded and fixed to the surface of the electrode post 11 away from the first surface 12; at this time, there is still a certain distance between the conductive sheet 2 and the first surface 12 of the battery cell 1, which is the height of the electrode post 11 protruding from the first surface 12.

[0063] In this embodiment, the thickness of the main body 31 of the positioning structure 3 is less than or equal to the height of the pole post 11 protruding from the first surface 12. By setting the positioning structure 3 in the area between the conductive sheet 2 and the first surface 12 of the battery cell 1, interference with the welding of the conductive sheet 2 and the pole post 11 is avoided. The space can be used reasonably, avoiding additional space occupation of the battery pack, ensuring space utilization and effectively ensuring energy density.

[0064] This ensures that the conductive sheet 2 can completely cover the assembly part 33, thereby guaranteeing that the conductive sheet 2 can be welded to the entire area of ​​the top surface of the pole post 11, and that the assembly part 33 will not interfere with the conductive sheet 2 when the conductive sheet 2 and the pole post 11 are in the welding state.

[0065] In some embodiments, combined with Figure 5 As shown, the positioning post 32 is formed by protruding from the side of the body part 31 away from the first surface 12;

[0066] In the direction perpendicular to the first surface 12, the projection of the conductive sheet 2 does not overlap with the positioning post 32.

[0067] By ensuring that the projection of the conductive sheet 2 does not overlap with the positioning post 32, the conductive sheet 2 will not interfere with the assembly of the positioning post 32 and the integrated busbar body 4, thus avoiding interference and ensuring the smooth assembly of the positioning post 32 and the positioning hole 41.

[0068] In some embodiments, the positioning structure 3 is an insulating element.

[0069] The positioning structure 3 can be made of materials such as plastic or rubber. By using insulating materials, the positioning structure 3 can prevent short circuits and improve safety while ensuring positioning and assembly requirements are met.

[0070] In some embodiments, the number of positioning structures 3 is M, and the integrated busbar body 4 has N positioning holes 41, where N≥M, and N and M are both positive integers;

[0071] Each positioning structure 3 is connected to a battery cell 1.

[0072] Combination Figure 1 As shown, since two points determine a straight line, when the number of positioning structures 3 is at least two and the integrated busbar body 4 has at least two corresponding positioning holes 41, the positioning structure 3 can be assembled between the integrated busbar body 4 and the battery pack 100 to achieve precise positioning of the integrated busbar body 4 and avoid shaking.

[0073] The number of positioning holes 41 opened in the integrated busbar body 4 can be more than the number of positioning structures 3, so as to reserve redundant assembly positions to meet the adjustment needs in the later stage.

[0074] In some embodiments, combined with Figure 4 As shown, the outer periphery of pole 11 is non-circular.

[0075] By constructing the outer periphery of the pole post 11 as non-circular and matching the outer periphery of the mounting part 33 with that of the pole post 11, the positioning structure 3 can be prevented from rotating after the mounting part 33 is fitted onto the outer periphery of the pole post 11, thus ensuring accurate positioning.

[0076] In some embodiments, the assembly part 33 is clearance-fitted with the outer peripheral side of the pole post 11.

[0077] In this embodiment, the maximum gap between the assembly part 33 and the outer periphery of the pole post 11 is S, which satisfies: S≤0.1mm.

[0078] By reasonably setting the maximum gap size between the assembly part 33 and the outer periphery of the terminal post 11, the positioning accuracy is effectively controlled, ensuring the accurate positioning of the integrated busbar body 4. This serves as a positioning constraint for the integrated busbar body 4, achieving precise positioning of the integrated busbar body 4 and the battery pack 100, reducing the deviation in the installation and fit between the conductive sheet 2 and the terminal post 11, ensuring precise welding, and avoiding short circuits caused by conductive sheet deviation.

[0079] The positioning structure 3 provided in the embodiments of this utility model is compatible with battery packs of different specifications, thereby greatly improving efficiency, reducing processing costs, and facilitating on-site management.

[0080] According to an embodiment of the present invention, another aspect provides an electrical device, including a battery pack as described above.

[0081] The electrical equipment provided in this embodiment of the present invention features a positioning hole 41 in the integrated busbar body 4 and a positioning structure 3. One end of the positioning structure 3 is fixedly connected to the terminal post 11 of any battery cell 1, and the other end extends towards the side close to the integrated busbar body 4 to form a positioning post 32. The positioning post 32 is assembled and connected to the positioning hole 41 to position the relative position of the integrated busbar body 4 and the battery pack 100. This enables precise positioning of the integrated busbar body 4 and the battery pack 100, reduces the deviation in the installation and fit of the conductive sheet 2 and the terminal post 11, ensures accurate welding, and avoids short circuits caused by conductive sheet deviation.

[0082] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A battery pack, characterized by, The battery pack (100) is stacked by a plurality of battery monomers (1); the battery monomer (1) comprises a pole (11); An integrated busbar body (4) is arranged on the side of the battery monomer (1) from which the pole (11) is led out; the integrated busbar body (4) is provided with a positioning hole (41); A positioning structure (3) is arranged on the side of the integrated busbar body (4) facing the battery pack (100); the positioning structure (3) comprises a body part (31) and a positioning column (32); the body part (31) is fixedly connected with the pole (11) of any battery monomer (1); the positioning column (32) is formed by the body part (31) extending towards the side close to the integrated busbar body (4); the positioning column (32) is arranged in the positioning hole (41) to position the relative position of the integrated busbar body (4) and the battery pack (100). The positioning structure (3) further comprises:

2. The battery pack of claim 1, wherein, An assembly part (33) is arranged on the body part (31); the assembly part (33) is arranged on the outer circumferential side of the pole (11); and the assembly part (33) is matched with the outer circumferential shape of the pole (11). The surface of the battery monomer (1) from which the pole (11) is led out is defined as a first surface (12); 3. The battery pack of claim 2, wherein, The battery pack further comprises a conductive sheet (2); the conductive sheet (2) is fixedly connected with the surface of the pole (11) away from the first surface (12); in the direction perpendicular to the first surface (12), the area surrounded by the assembly part (33) is located in the projection range of the conductive sheet (2). The thickness of the body part (31) is less than or equal to the height of the pole (11) protruding from the first surface (12).

4. The battery pack of claim 3, wherein, The positioning column (32) is formed by the side of the body part (31) away from the first surface (12); 5. The battery pack of claim 3, wherein, In the direction perpendicular to the first surface (12), the projection of the conductive sheet (2) does not overlap with the positioning column (32). The positioning structure (3) is an insulating part.

6. The battery pack of any one of claims 1 to 5, wherein, The number of the positioning structure (3) is M; the integrated busbar body (4) is provided with N positioning holes (41); N is greater than or equal to M; and N and M are positive integers; 7. The battery pack of any one of claims 1 to 5, wherein, Each positioning structure (3) is connected with one battery monomer (1). The outer circumferential shape of the pole (11) is non-circular.

8. The battery pack of claim 2, wherein, The assembly part (33) is gap-fitted with the outer circumferential side of the pole (11).

9. The battery pack of claim 8, wherein, The battery pack comprises any one of the battery packs according to claims 1 to 9.

10. An electric device, characterized by ​

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