Busbar and battery pack with same

Abstract

The utility model discloses a bus bar and a battery pack with the same, the bus bar is used for connecting two adjacent battery cells, the bus bar comprises a central part, the central part is provided with two welding holes, and poles of the two adjacent battery cells are respectively arranged in the two welding holes in a penetrating manner and are connected with the central part in a welding manner; the mounting part is connected to the edge of the central part and is used for fixing the busbar and the battery cell, and the thickness of the central part is greater than that of the mounting part. According to the busbar disclosed by the utility model, the busbar comprises the central part and the mounting part, and the thickness of the central part is greater than that of the mounting part, so that a relatively large current in the middle can be borne, the current bearing capacity of the busbar is improved, the condition of over-fast current temperature rise is relieved, the safety of connection between battery cells is ensured, and the safety and reliability of a battery pack are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a bus bar and a battery pack having the same. Background Art

[0002] Nowadays, the world is facing energy shortage, and green and sustainable electricity is gradually becoming a popular choice. As a hot direction of the current development of the automobile industry, electric vehicles powered by electricity, their core energy components, power batteries and related technologies have become the focus of global scientific and technological practitioners.

[0003] At present, there are still many areas that need to be improved in power batteries, which often brings many inconveniences. Existing modules need to meet a large number of different customer needs, such as high current and multi-cell parallel requirements, but the busbar structure of existing modules is simple and cannot meet the requirements of high current and multi-cell parallel conditions, which brings safety risks to new energy battery products. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a busbar, the central part of which can carry a large current, improve the current carrying capacity of the busbar, alleviate the situation of excessively fast current temperature rise, ensure the safety of the connection between the battery cells, and improve the safety and reliability of the battery pack.

[0005] The utility model also provides a battery pack, which includes the above-mentioned bus bar.

[0006] According to the embodiment of the utility model, the busbar is used to connect two adjacent battery cells, and the busbar includes: a central portion, the central portion has two welding holes, and the poles of the two adjacent battery cells are respectively inserted into the two welding holes and welded to the central portion; a mounting portion, the mounting portion is connected to the edge of the central portion, and is used to fix the busbar to the battery cell, and the thickness of the central portion is greater than the thickness of the mounting portion.

[0007] According to the busbar of the embodiment of the utility model, the busbar includes a central portion and an installation portion. The thickness of the central portion is greater than the thickness of the installation portion, and can carry a larger current in the middle, thereby increasing the current carrying capacity of the busbar, alleviating the situation of excessive temperature rise of the current, ensuring the safety of the connection between battery cells, and improving the safety and reliability of the battery pack.

[0008] In addition, the busbar according to the utility model may also have the following additional technical features:

[0009] In some embodiments, the mounting portion includes a first mounting portion and a second mounting portion, the first mounting portion and the second mounting portion are located on both sides of the central portion along a first direction, and the first direction is perpendicular to a thickness direction of the busbar.

[0010] In some embodiments, a first bending portion is provided between the first mounting portion and the central portion, and in a cross section parallel to the first direction, the first bending portion is bent toward one side in the thickness direction of the central portion; and / or, a second bending portion is provided between the second mounting portion and the central portion, and in a cross section parallel to the first direction, the second bending portion is bent toward one side in the thickness direction of the central portion.

[0011] In some embodiments, the central portion includes a first central portion and a second central portion spaced apart along a first direction, the two welding holes are respectively arranged on the first central portion and the second central portion, the mounting portion is connected to the edge of at least one of the first central portion and the second central portion, and the first direction is perpendicular to the thickness direction of the bus.

[0012] In some embodiments, the mounting portion includes a third mounting portion, and the third mounting portion is provided at least at one of the two ends of the first center portion along the second direction, and the second direction is perpendicular to the first direction and the thickness direction of the bus is perpendicular to each other; and / or, the mounting portion includes a fourth mounting portion, and the fourth mounting portion is provided at least at one of the two ends of the second center portion along the second direction, and the second direction is perpendicular to the first direction and the thickness direction of the bus is perpendicular to each other.

[0013] In some embodiments, a third bending portion is provided between the first central portion and the second central portion, and in a cross section parallel to the first direction, the third bending portion is bent toward one side in a thickness direction of the central portion.

[0014] In some embodiments, the mounting portion has a plurality of spaced apart fixing holes, and the fixing holes are used to connect with the battery core.

[0015] In some embodiments, at least one of the central portion and the mounting portion is provided with at least one viewing hole.

[0016] In some embodiments, the bus is an integral piece; or, in the thickness direction of the bus, the central portion includes a first layer central portion and a second layer central portion stacked together, the mounting portion is connected to the edge of the second layer central portion, the second layer central portion and the mounting portion are an integral piece, and the first layer central portion and the second layer central portion are independently molded parts.

[0017] The utility model also provides a battery pack having the above embodiment.

[0018] According to the battery pack of the embodiment of the utility model, the bus is provided with the above-mentioned bus, which includes a central portion and an installation portion. The thickness of the central portion is greater than the thickness of the installation portion, and can carry a larger current in the middle, thereby increasing the current carrying capacity of the bus, alleviating the situation of excessive temperature rise of the current, ensuring the safety of the connection between the battery cells, and improving the safety and reliability of the battery pack.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a three-dimensional diagram of a busbar according to a first embodiment of the utility model;

[0022] Figure 2 It is a three-dimensional diagram of a bus bar according to a second embodiment of the utility model.

[0023] Reference numerals:

[0024] 100. Bus;

[0025] 1. Center; 11. First center; 12. Second center; 13. Welding hole; 14. Third bending portion; 15. First layer center; 16. Second layer center;

[0026] 2. Mounting portion; 21. First mounting portion; 211. First bending portion; 22. Second mounting portion; 221. Second bending portion; 23. Third mounting portion; 24. Fourth mounting portion; 25. Fixing hole; 26. Observation hole. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The busbar 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0032] like Figure 1 and Figure 2 As shown, the busbar 100 according to the embodiment of the present invention is used to connect two adjacent battery cells. The busbar 100 includes a central portion 1 and a mounting portion 2 .

[0033] Specifically, refer to the attached Figure 1 and attached Figure 2 As shown, the central part 1 has two welding holes 13, and the poles of two adjacent battery cells are respectively inserted into the two welding holes 13 and welded to the central part 1 to realize the series connection or parallel connection of the two adjacent battery cells.

[0034] Further, see Attachment Figure 1As shown, the mounting portion 2 is connected to the edge of the central portion 1, and is used to fix the busbar 100 to the battery cell, ensure the assembly of the busbar 100, and ensure the reliability of the connection between two adjacent battery cells. Figure 1 and attached Figure 2 As shown, the thickness of the central portion 1 is greater than the thickness of the mounting portion 2, and can carry a larger current in the middle, thereby increasing the current carrying capacity of the busbar 100, alleviating the situation where the current temperature rises too quickly, ensuring the safety of the connection between the battery cells, and improving the safety and reliability of the battery pack.

[0035] It should be noted that the thickness of the mounting portion 2 is relatively small, which can relatively reduce the weight of the busbar 100 and reduce the production cost of the busbar 100 .

[0036] According to the busbar 100 of the embodiment of the utility model, the busbar 100 includes a central portion 1 and an installation portion 2. The thickness of the central portion 1 is greater than the thickness of the installation portion 2, and can carry a larger current in the middle, thereby increasing the current carrying capacity of the busbar 100, alleviating the situation of excessively rapid temperature rise of the current, ensuring the safety of the connection between battery cells, and improving the safety and reliability of the battery pack.

[0037] In some embodiments of the present invention, refer to the attached Figure 1 As shown, the mounting portion 2 includes a first mounting portion 21 and a second mounting portion 22. The first mounting portion 21 and the second mounting portion 22 are located at the center portion 1 along a first direction (see attached Figure 1 The first direction is perpendicular to the thickness direction of the busbar 100 (see the attached Figure 2 b direction as shown), the first mounting portion 21 and the second mounting portion 22 can fix the center portion 1 from both sides of the center portion 1 along the first direction, thereby ensuring that the force on the center portion 1 is balanced, facilitating the connection between the bus 100 and the battery cell, and ensuring the reliability and stability of the connection between the bus 100 and the battery cell.

[0038] In a further embodiment of the present invention, refer to the attached Figure 1 As shown, a first bending portion 211 is provided between the first mounting portion 21 and the central portion 1. In a cross section parallel to the first direction, the first bending portion 211 faces the thickness direction of the central portion 1 (see FIG. Figure 2 The first bending portion 211 is bent on one side in the direction b) as shown in the figure. The setting of the first bending portion 211 can provide a reserved deformation amount, thereby ensuring the reliability of the connection between the first mounting portion 21 and the central portion 1, thereby improving the stability of the bus 100.

[0039] Further, see Attachment Figure 1As shown, a second bending portion 221 is provided between the second mounting portion 22 and the central portion 1. In a cross section parallel to the first direction, the second bending portion 221 is bent toward one side in the thickness direction of the central portion 1. The setting of the second bending portion 221 can provide a reserved deformation amount to ensure the reliability of the connection between the second mounting portion 22 and the central portion 1, thereby improving the stability of the bus 100.

[0040] In some embodiments of the present invention, refer to the attached Figure 1 As shown, the center portion 1 includes a first center portion 11 and a second center portion 12 spaced apart along a first direction, and two welding holes 13 are respectively provided on the first center portion 11 and the second center portion 12 to space the poles of two adjacent battery cells to avoid direct contact between the poles of two adjacent battery cells and better match the positions of the poles. An installation portion 2 is connected to the edge of at least one of the first center portion 11 and the second center portion 12, and the first direction is perpendicular to the thickness direction of the busbar 100 to ensure the normal installation of the busbar 100.

[0041] In a further embodiment of the present invention, refer to the attached Figure 1 As shown, the mounting portion 2 includes a third mounting portion 23, and the first central portion 11 is arranged along the second direction (see attached Figure 1 At least one of the two ends of the busbar 100 (in the c direction shown in the figure) is provided with a third mounting portion 23, and the second direction is perpendicular to the first direction and the thickness direction of the busbar 100. The third mounting portion 23 can fix the first central portion 11 from at least one side of the first central portion 11 along the second direction, which facilitates the connection between the busbar 100 and the battery cell and ensures the reliability and stability of the connection between the busbar 100 and the battery cell. In a specific example, refer to the attached Figure 1 As shown, the third mounting portions 23 are disposed at both ends of the first central portion 11 along the second direction, and are symmetrically designed to facilitate the production and processing of the busbar 100 .

[0042] Further, see Attachment Figure 1 As shown, the mounting portion 2 includes a fourth mounting portion 24, and at least one of the two ends of the second central portion 12 along the second direction is provided with a fourth mounting portion 24, and the second direction is perpendicular to the first direction and the thickness direction of the busbar 100. The fourth mounting portion 24 can fix the second central portion 12 from at least one side of the second central portion 12 along the second direction, which facilitates the connection between the busbar 100 and the battery cell, and ensures the reliability and stability of the connection between the busbar 100 and the battery cell. In a specific example, refer to the attached Figure 1 As shown, both ends of the second central portion 12 along the second direction are provided with fourth mounting portions 24 , which are symmetrically designed to facilitate the production and processing of the busbar 100 .

[0043] In a further embodiment of the present invention, refer to the attached Figure 1 As shown, a third bending portion 14 is provided between the first center portion 11 and the second center portion 12. On a cross section parallel to the first direction, the third bending portion 14 is bent toward one side in the thickness direction of the center portion 1. The setting of the third bending portion 14 can provide a reserved deformation amount to ensure the reliability of the connection between the first center portion 11 and the second center portion 12, thereby improving the stability of the bus 100.

[0044] It should be noted that the reference Figure 1 As shown, the bend of the third bending portion 14 is greater than the bend of the first bending portion 211 and the second bending portion 221. For example, in the first direction, the length of the third bending portion 14 may be greater than the length of the first bending portion 211 and the length of the second bending portion 221; the curvature of the third bending portion 14 may be greater than the curvature of the first bending portion 211 and the curvature of the second bending portion 221; or in the thickness direction of the busbar 100, the distance between the inner bottom wall of the third bending portion 14 and the first central portion 11 may be greater than the distance between the first bending portion 211 and the first mounting portion 21 and the distance between the second bending portion 221 and the second mounting portion 22.

[0045] In some embodiments of the present invention, refer to the attached Figure 1 As shown, the mounting portion 2 has a plurality of spaced apart fixing holes 25, which are used to connect to the battery cell, thereby ensuring the reliability of the connection between the busbar 100 and the battery cell and ensuring the stability and safety of the battery pack. Figure 1 As shown, the mounting portion 2 has four spaced apart fixing holes 25 , which are respectively arranged on the first mounting portion 21 , the second mounting portion 22 , the third mounting portion 23 and the fourth mounting portion 24 , which can further improve the reliability of the connection between the busbar 100 and the battery cell.

[0046] In some embodiments of the present invention, refer to the attached Figure 1 As shown, at least one of the central portion 1 and the mounting portion 2 is provided with at least one observation hole 26, which can facilitate observation and assembly of the busbar 100. It can be understood that the observation hole 26 can be provided only on the central portion 1, or only on the mounting portion 2, or both on the central portion 1 and the mounting portion 2.

[0047] In a specific example, see the attached Figure 1 As shown, the first central portion 11 , the second central portion 12 , the first mounting portion 21 and the second mounting portion 22 all have two observation holes 26 spaced apart along the second direction, which can facilitate observation and assembly of the busbar 100 .

[0048] In some embodiments of the present invention, refer to the attached Figure 1As shown, the busbar 100 is an integrated part, which can reduce the difficulty of installing the busbar 100 and simplify the assembly process of the battery pack. Specifically, the processing method of the busbar 100 is machining and casting, which is simple to process and convenient to produce. The material of the busbar 100 is 1060Al and T2Y2 copper, which has good electrical conductivity and thermal conductivity, is corrosion-resistant and easy to process.

[0049] Further, see Attachment Figure 2 As shown, in the thickness direction of the bus 100, the center portion 1 includes a first-layer center portion 15 and a second-layer center portion 16 which are stacked, the mounting portion 2 is connected to the edge of the second-layer center portion 16, the second-layer center portion 16 and the mounting portion 2 are an integral piece, the first-layer center portion 15 and the second-layer center portion 16 are both independent molded parts formed by stamping, and the first-layer center portion 15 and the second-layer center portion 16 are welded to each other, which can facilitate the production and processing of the first-layer center portion 15 and the second-layer center portion 16 and reduce the production difficulty of the bus 100.

[0050] The present invention also provides a battery pack having the bus bar 100 of the above embodiment.

[0051] According to the battery pack of the embodiment of the utility model, the above-mentioned busbar 100 is provided. The busbar 100 includes a central portion 1 and an installation portion 2. The thickness of the central portion 1 is greater than the thickness of the installation portion 2. It can carry a larger current in the middle, thereby improving the current carrying capacity of the busbar 100, alleviating the situation of excessive temperature rise of the current, ensuring the safety of the connection between the battery cells, and improving the safety and reliability of the battery pack.

[0052] Other structures and operations of the busbar 100 and the battery pack according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A busbar, characterized in that: Used to connect two adjacent battery cells, the bus bar includes: A central portion, wherein the central portion has two welding holes, and poles of two adjacent battery cells are respectively inserted into the two welding holes and are welded to the central portion; The mounting portion is connected to the edge of the central portion and is used to fix the busbar and the battery core. The thickness of the central portion is greater than the thickness of the mounting portion.

2. The busbar according to claim 1, characterized in that: The mounting portion includes a first mounting portion and a second mounting portion, wherein the first mounting portion and the second mounting portion are located at two sides of the central portion along a first direction, and the first direction is perpendicular to a thickness direction of the busbar.

3. The busbar according to claim 2, characterized in that: A first bending portion is provided between the first mounting portion and the central portion, and in a cross section parallel to the first direction, the first bending portion is bent toward one side in a thickness direction of the central portion; And / or, a second bending portion is provided between the second mounting portion and the central portion, and in a cross section parallel to the first direction, the second bending portion is bent toward one side in a thickness direction of the central portion.

4. The busbar according to claim 1, characterized in that: The central portion includes a first central portion and a second central portion spaced apart along a first direction, the two welding holes are respectively arranged on the first central portion and the second central portion, the mounting portion is connected to an edge of at least one of the first central portion and the second central portion, and the first direction is perpendicular to the thickness direction of the busbar.

5. The busbar according to claim 4, characterized in that: The mounting portion includes a third mounting portion, and the third mounting portion is provided at at least one of the two ends of the first central portion along the second direction, and the second direction is perpendicular to the first direction and the thickness direction of the busbar is perpendicular to each other; And / or, the mounting portion includes a fourth mounting portion, and the fourth mounting portion is provided at at least one of the two ends of the second central portion along the second direction, and the second direction is perpendicular to the first direction and the thickness direction of the busbar.

6. The busbar according to claim 4, characterized in that: A third bent portion is provided between the first central portion and the second central portion. In a cross section parallel to the first direction, the third bent portion is bent toward one side in a thickness direction of the central portion.

7. The busbar according to claim 1, characterized in that: The mounting portion is provided with a plurality of spaced apart fixing holes, and the fixing holes are used for connecting with the battery core.

8. The busbar according to claim 1, characterized in that: At least one observation hole is provided on at least one of the central portion and the mounting portion.

9. The busbar according to claim 1, characterized in that: The busbar is an integral part; Or, in the thickness direction of the bus, the center portion includes a first layer center portion and a second layer center portion which are stacked, the mounting portion is connected to the edge of the second layer center portion, the second layer center portion and the mounting portion are an integral piece, and the first layer center portion and the second layer center portion are independently molded pieces.

10. A battery pack, characterized in that: Comprising the busbar according to any one of claims 1-9.

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