Busbar, battery pack and electric device

Abstract

The embodiment of the application provides a busbar, a battery pack and a power utilization device. The busbar comprises a round pipe section, a flat round pipe section and a transition pipe section. The flat round pipe section is partially flattened in structure, and the transition pipe section is connected to the round pipe section and the flat round pipe section at two ends. The busbar provided by the embodiment of the application is flexible in deformation, can absorb tolerances generated during assembly, and avoids the situation that the mounting hole on the busbar deviates from the preset position during assembly.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a busbar, battery pack and electrical equipment. Background Technology

[0002] In recent years, domestic and foreign automakers have launched new energy vehicles, primarily hybrid or pure electric, paving the way for their development. As the core energy source for new energy vehicles, the design and construction of the power battery pack have a crucial impact on vehicle performance, safety, and driving range. Power battery costs account for 40% or even more of the total vehicle cost, making cost reduction a key task for battery suppliers and OEMs. The high-voltage circuit (high-voltage connection module) in the battery pack includes fast-charging, pre-charging, slow-charging, heating, and discharging circuits, with connections primarily achieved via busbars. Current busbars are mostly made of copper, aluminum, or copper-aluminum composites. The high-voltage connection circuit assembly between cells is the busbar, while the high-voltage connection circuits between modules, high-voltage components, and front / rear drive connectors and high-voltage components are made of copper / aluminum. In new energy vehicle batteries, the battery pack busbar enables series and parallel connections between cells or battery modules, serving to shunt or collect current and voltage. Existing busbars are generally made of one or more flat copper / aluminum sheets, which are formed into the required shape through bending, stamping and other forming methods. For busbars with rigidity requirements, flexible deformation is not possible, so it cannot absorb the tolerance problems caused by assembly. This can lead to situations such as the mounting holes on the busbar deviating from the preset position during assembly. Utility Model Content

[0003] This application provides a busbar, battery pack, and electrical equipment that can absorb installation errors caused by fluctuations in the mounting hole positions. It avoids situations where, for busbars with rigid requirements, flexible deformation is not possible, thus failing to absorb tolerance issues arising during assembly, such as mounting holes on the busbar deviating from their preset positions during assembly.

[0004] In a first aspect, embodiments of this application provide a bus, including:

[0005] The pipe consists of a circular pipe section, a flattened circular pipe section, and a transition pipe section. The flattened circular pipe section is a partially flattened structure of the circular pipe section, and the two ends of the transition pipe section are connected to the circular pipe section and the flattened circular pipe section, respectively.

[0006] As one feasible implementation, the flat cylindrical tube segment has a flat surface and adjacent flat surfaces are perpendicular to each other.

[0007] One feasible implementation includes four flat cylindrical pipe sections, three cylindrical pipe sections, and six transition pipe sections.

[0008] As one feasible implementation, a flat cylindrical pipe section is provided at each end of the busbar.

[0009] As one feasible implementation, each of the two flat cylindrical pipe sections located at both ends of the busbar is provided with a bolt mounting hole.

[0010] As one feasible implementation, the length of the circular pipe section is 50mm, the length of the transition pipe section is 15mm, and the length of the flat circular pipe section is 30mm.

[0011] As one feasible implementation, the outer diameter of the circular pipe section is 12mm and the inner diameter is 10mm.

[0012] As one feasible implementation, the width of the flat cylindrical tube section is 22 mm.

[0013] As one feasible implementation, the busbar material is copper or aluminum.

[0014] Secondly, embodiments of this application provide a battery pack including the bus described above.

[0015] Thirdly, embodiments of this application provide an electrical device, including the aforementioned busbar or battery pack.

[0016] This application provides a busbar, a battery pack, and an electrical device. The busbar includes a circular pipe section, a flattened circular pipe section, and a transition pipe section. The flattened circular pipe section is a partially flattened structure of the circular pipe section. The circular pipe section and the flattened circular pipe section are arranged alternately, and the transition pipe section is located at the connection between the circular pipe section and the flattened circular pipe section.

[0017] The busbar provided in this application embodiment achieves flexible deformation by setting a flat round tube section, which can absorb tolerance problems caused during assembly and avoid situations such as the mounting holes on the busbar deviating from the preset position during assembly. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] Figure 1 A schematic diagram of the bus structure provided in the embodiments of this application. Figure 1 ;

[0020] Figure 2 A schematic diagram of the bus structure provided in the embodiments of this application. Figure 2 ;

[0021] Figure 3 A schematic diagram of the bus structure provided in the embodiments of this application. Figure 3 .

[0022] Explanation of reference numerals in the attached figures:

[0023] 1: Circular pipe section;

[0024] 2: Flat round tube section; 21: Threaded hole;

[0025] 3: Transition pipe section.

[0026] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0027] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0028] In related technologies, there are two main types of busbars. One is a rigid copper busbar connection, characterized by copper busbars of uniform thickness. Due to its thickness, it has rigidity, but it cannot be flexibly deformed, which can lead to misalignment between the screw holes on the busbar and the mounting screw holes during assembly due to excessive assembly tolerances. The other method is to combine and stack multiple thin copper sheets, then weld and stamp them. Although this type of connection has flexibility, the combination of multiple thin copper sheets can lead to decreased conductivity and insufficient strength during use. In addition, the process of stacking, welding, and stamping multiple layers is complex, costly, and impractical. Both methods also use a buffer sleeve in the middle for cushioning, which increases costs.

[0029] Therefore, embodiments of this application provide a busbar, a battery pack, and an electrical device. The busbar includes a circular pipe section, a flattened circular pipe section, and a transition pipe section. The flattened circular pipe section is a partially flattened structure of the circular pipe section, and the two ends of the transition pipe section are respectively connected to the circular pipe section and the flattened circular pipe section.

[0030] The busbar provided in this application embodiment achieves flexible deformation by setting a flat oval tube section, which can absorb tolerance problems caused during assembly and avoid situations such as the mounting holes on the busbar deviating from the preset position during assembly.

[0031] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0032] In a first aspect, embodiments of this application provide a busbar, which includes a circular pipe section 1, a flat circular pipe section 2, and a transition pipe section 3. The flat circular pipe section 2 is a partially flattened structure of the circular pipe section 1, and the two ends of the transition pipe section 3 are respectively connected to the circular pipe section 1 and the flat circular pipe section 2.

[0033] The circular pipe section 1 is a rigid structure, while the flat circular pipe section 2 is formed by flattening the circular pipe section 1 and is a flexible structure. The transition pipe section connects the circular pipe section 1 and the flat circular pipe section 2. The flat circular pipe section 2 can be bent and deformed under stress. At this time, the position of the rest of the busbar will change accordingly. This design can achieve the purpose of absorbing the assembly tolerance of the busbar as a whole.

[0034] The busbar provided in this embodiment achieves flexible deformation by bending the flat oval tube section 2, which can absorb tolerance problems caused during assembly and avoid situations such as the mounting holes on the busbar deviating from the preset position during assembly.

[0035] As one feasible implementation, the flat oval tube segment 2 has a flat surface and adjacent flat surfaces are perpendicular to each other. The bending direction of the flat oval tube segment 2 is perpendicular to the flat surface. The perpendicularity of adjacent flat surfaces allows the busbar to absorb tolerances in both perpendicular directions. Similarly, setting a certain angle between different flat surfaces allows the busbar to absorb tolerances in the direction of the corresponding angle, thereby enabling the busbar to adapt to various assembly structures and effectively absorb the tolerances generated by different assembly structures.

[0036] For example, the busbar is provided with four flat round pipe sections 2, three round pipe sections 1 and six transition pipe sections. The round pipe sections 1 of the busbar provide rigidity during assembly. The transition pipe sections connect the round pipe sections 1 and the flat round pipe sections 2. The four mutually perpendicular flat round pipe sections 2 can be bent and deformed separately to absorb tolerances in two mutually perpendicular directions. The round pipe sections 1, flat round pipe sections 2 and transition pipe sections can be integrally formed. The flat round pipe sections 2 are made by flattening the round pipe sections 1. The transition pipe sections are formed by flattening the flat round pipe sections 2 and connecting the edge of the round pipe sections 1.

[0037] As one feasible implementation, a flat round pipe section 2 is provided at each end of the busbar. The flat round pipe section 2 at both ends of the busbar is used to connect with other fittings, while the remaining two flat round pipe sections 2 are used for bending deformation to absorb tolerances.

[0038] As one feasible implementation, each of the two flat round pipe sections 2 at both ends of the busbar is provided with a threaded hole 21. Multiple threaded holes 21 or other installation structures can also be provided as needed to allow the busbar to be connected to other assemblies through the flat round pipe sections 2 at both ends.

[0039] As one feasible implementation, the length of the circular pipe section 1 is 50mm, the length of the transition pipe section is 15mm, and the length of the flat circular pipe section 2 is 30mm. The size design of the circular pipe section 1, the transition pipe section, and the flat circular pipe section 2 takes into account the actual size requirements of the busbar assembly, that is, the size of the busbar takes into account the structural requirements of the assemblies it is assembled with.

[0040] As one feasible implementation, the outer diameter of the circular pipe section 1 is 12mm and the inner diameter is 10mm.

[0041] As one feasible implementation, the width of the flat cylindrical tube segment 2 is 22 mm.

[0042] As one feasible implementation, the bus material is copper or aluminum. The bus can be made of conductive materials such as metals, especially of copper or aluminum, which have good conductivity.

[0043] Secondly, embodiments of this application provide a battery pack including the bus described above.

[0044] It is understood that since the battery pack of this application adopts the technical solution of the above-described bus embodiment, it has at least the beneficial effects brought about by the technical solution of the above-described bus embodiment, which will not be elaborated here.

[0045] Thirdly, embodiments of this application provide an electrical device, including the aforementioned busbar or battery pack.

[0046] For example, electrical equipment may be a refrigerator, washing machine, television, computer, electric motor, switch, electric vehicle, etc. This application does not limit the specific type of electrical equipment.

[0047] It is understood that since the electrical equipment of this application adopts the technical solution of the above-described busbar or battery pack embodiments, it at least has the beneficial effects brought about by the technical solution of the above-described busbar or battery pack embodiments, which will not be elaborated here.

[0048] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A busbar, characterized in that, It includes a circular pipe segment, a flattened circular pipe segment, and a transition pipe segment. The flattened circular pipe segment is a partially flattened structure of the circular pipe segment. The two ends of the transition pipe segment are respectively connected to the circular pipe segment and the flattened circular pipe segment.

2. The busbar according to claim 1, characterized in that, The flattened cylindrical tube segment has a flat surface and adjacent flat surfaces are perpendicular to each other.

3. The busbar according to claim 2, characterized in that, It includes four of the flat cylindrical pipe sections, three of the cylindrical pipe sections, and six of the transition pipe sections.

4. The busbar according to claim 3, characterized in that, Each of the two ends of the busbar is provided with a flat cylindrical pipe section.

5. The busbar according to claim 4, characterized in that, Each of the two flat cylindrical pipe sections located at both ends of the busbar is provided with a bolt mounting hole.

6. The busbar according to claim 1, characterized in that, The length of the circular pipe section is 50mm, the length of the transition pipe section is 15mm, and the length of the flat circular pipe section is 30mm.

7. The busbar according to claim 1, characterized in that, The outer diameter of the circular pipe section is 12mm, and the inner diameter is 10mm.

8. The busbar according to claim 3, characterized in that, The width of the flat cylindrical tube section is 22 mm.

9. The busbar according to claim 1, characterized in that, The busbar material is copper or aluminum.

10. A battery pack, characterized in that, Includes the bus as described in any one of claims 1-9.

11. An electrical appliance, characterized in that, Includes the bus as described in any one of claims 1-9 or the battery pack as described in claim 10.

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