Busbars and batteries

Abstract

The application provides a busbar and a battery, which can improve the technical problem of insufficient overcurrent capacity of the busbar. The busbar comprises a first metal plate and a second metal plate which are sequentially connected and integrally formed along a first direction, and the first metal plate and the second metal plate are arranged at an angle; the first metal plate comprises a first connecting section and a second connecting section which are sequentially distributed along a second direction, and the second direction intersects the first direction; and the first connecting section and the second connecting section are connected with the second metal plate.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a busbar and a battery. Background Technology

[0002] The bus provided by related technologies, such as Figure 1 As shown, the busbar 10' includes a first plate a, a bent plate b, and a second plate c connected in sequence. When current flows through the busbar 10', the current can flow from the first plate a through the bent plate b to the second plate c, or vice versa. However, because the bent plate b in the busbar 10' is relatively narrow, the current-carrying capacity of the busbar 10' is insufficient, resulting in severe overheating of the busbar 10'. Utility Model Content

[0003] Embodiments of this application provide a bus and a battery that can improve the technical problem of insufficient bus current carrying capacity.

[0004] In a first aspect, embodiments of this application provide a busbar, including a first metal plate and a second metal plate that are sequentially connected and integrally formed along a first direction, wherein the first metal plate and the second metal plate are arranged at an angle; the first metal plate includes a first connecting segment and a second connecting segment that are sequentially distributed along a second direction, wherein the second direction intersects the first direction; both the first connecting segment and the second connecting segment are connected to the second metal plate.

[0005] In one embodiment, the first metal plate further includes a buffer section connected between the first connecting section and the second connecting section.

[0006] In one embodiment, the busbar is provided with a cut-off portion adjacent to the buffer section, the cut-off portion being used to cut off the connection between the buffer section and the second metal plate.

[0007] In one embodiment, the cut-off portion is a notch, which is formed on the first metal plate and / or the second metal plate, and the notch extends at least to the connection between the first metal plate and the second metal plate.

[0008] In one embodiment, the buffer section is an arched structure formed by partially bending the first metal plate.

[0009] In one embodiment, the cross-section of the arched structure along the thickness direction of the first metal plate is arc-shaped.

[0010] In one embodiment, the height H1 of the arched structure protruding from the surface of the first connecting segment is 0.9 mm to 1.1 mm.

[0011] In one embodiment, the thickness D1 of the arch structure is 1.4 mm to 1.6 mm.

[0012] In one embodiment, in the second direction, the ratio of the width W3 of the cut portion to the width W2 of the buffer segment is 1.2 to 1.4.

[0013] In one embodiment, in the second direction, the ratio of the width W4 of the second metal plate to the width W1 of the first metal plate is 1 to 1.2.

[0014] In one embodiment, in the second direction, the ratio of the width W3 of the cut portion to the width W4 of the second metal plate is 0.2 to 0.25.

[0015] In one embodiment, in the second direction, the ratio of the width W2 of the buffer segment to the width W1 of the first metal plate is 0.14 to 0.18.

[0016] In one embodiment, the busbar further includes a third metal plate located on the side of the second metal plate away from the first metal plate. The third metal plate is integrally formed with the second metal plate and is arranged at an angle to the second metal plate.

[0017] In one embodiment, the included angle α between the first metal plate and the second metal plate is 90° to 120°.

[0018] In one embodiment, the included angle β between the third metal plate and the second metal plate is 90° to 120°.

[0019] In one embodiment, a first connecting hole is provided on the first connecting segment.

[0020] In one embodiment, a second connecting hole is provided on the second connecting segment.

[0021] In one embodiment, the third metal plate has a third connection hole.

[0022] In one embodiment, in the direction from the first metal plate to the third metal plate, the second metal plate includes a first arc segment, a straight segment, and a second arc segment connected in sequence, the first arc segment being connected to the first metal plate, and the second arc segment being connected to the third metal plate.

[0023] Secondly, embodiments of this application provide a battery including multiple battery cells assembled together and the aforementioned busbar, wherein the first connecting segment and the second connecting segment on the busbar are respectively connected to two adjacent battery cells.

[0024] In one embodiment, the battery includes a battery management system module, and the second metal plate is connected to the battery management system module.

[0025] The beneficial effects of the embodiments of this application are as follows:

[0026] The bus provided in this embodiment can be used to connect to the battery cell using a first metal plate, while the second metal plate can be used to connect to the battery management system module. The first connecting segment and the second connecting segment on the first metal plate are used to connect different battery cells. Since both the first connecting segment and the second connecting segment are connected to the second metal plate, the current can flow directly between the first connecting segment and the second metal plate, and also directly between the second connecting segment and the second metal plate. This increases the current flow path and current-carrying area on the bus, improves the current-carrying capacity of the bus, and reduces the risk of the bus overheating. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of the bus provided by related technologies;

[0029] Figure 2 This is a three-dimensional structural diagram of a busbar provided by an embodiment of this application from a certain perspective;

[0030] Figure 3 This is a three-dimensional structural diagram of a busbar provided by an embodiment of this application from another perspective;

[0031] Figure 4 This is a top view schematic diagram of a busbar structure provided in an embodiment of this application;

[0032] Figure 5 This is a side view of a bus provided in an embodiment of this application;

[0033] Figure 6 yes Figure 5 Enlarged view of section A;

[0034] Figure 7 yes Figure 5 Enlarged view of section B;

[0035] Figure 8 This is a front view of a bus provided in an embodiment of this application;

[0036] Figure 9 This is a three-dimensional structural schematic diagram of another bus provided in an embodiment of this application;

[0037] Figure 10 This is a schematic diagram of the battery structure provided in an embodiment of this application.

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

[0039] 10. Busbar;

[0040] 1. First metal plate; 11. First connecting section; 111. First connecting hole; 12. Buffer section; 121. Arched structure; 122. Groove; 13. Second connecting section; 131. Second connecting hole;

[0041] 2. Second metal plate; 21. First arc segment; 22. Straight segment; 23. Second arc segment;

[0042] 3. Cut-off section; 31. Notch;

[0043] 4. Third metal plate; 41. Third connecting hole;

[0044] 100. Battery; 110. Battery cell. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] Furthermore, it should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its actual use or operation, specifically the directions shown in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0047] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] In the description of the embodiments of this application, the words "example" or "for example" are used to indicate exemplification, illustration, or description. Any embodiment or design described as "example" or "for example" in the embodiments of this application is not to be construed as being more preferred or having more advantages than another embodiment or design. The use of the words "example" or "for example" is intended to present relative concepts in a clear manner.

[0051] To facilitate understanding of the present application, the spline curves and arrows used in the reference numerals in the accompanying drawings are explained below: spline curves without arrows indicate solid parts, that is, parts with solid structures; spline curves with arrows indicate virtual parts, that is, parts without solid structures.

[0052] Firstly, please see Figures 2 to 10 This application provides a busbar 10. The busbar 10 includes a first metal plate 1 and a second metal plate 2 that are sequentially connected and integrally formed along a first direction, with the first metal plate 1 and the second metal plate 2 arranged at an angle; the first metal plate 1 includes a first connecting segment 11 and a second connecting segment 13 that are sequentially distributed along a second direction, which intersects with the first direction; both the first connecting segment 11 and the second connecting segment 13 are connected to the second metal plate 2.

[0053] Busbar 10 is an important connecting component inside battery 100, used to connect multiple cells 110 in series or parallel to form a complete battery module. Busbar 10 is usually made of a metal material with good electrical conductivity, such as copper, aluminum, or copper-nickel composite material.

[0054] Specifically, the busbar 10 includes a first metal plate 1 and a second metal plate 2. Along a first direction, the first metal plate 1 and the second metal plate 2 are connected sequentially, specifically, the first metal plate 1 and the second metal plate 2 are integrally formed. The first metal plate 1 and the second metal plate 2 are arranged at an angle, meaning they are not on the same plane, and the second metal plate 2 is bent relative to the first metal plate 1. Optionally, the first metal plate 1 and the second metal plate 2 are perpendicular to each other. As an example, the busbar 10 is formed by stamping a metal mother plate, with a portion of the metal mother plate forming the first metal plate 1 and a portion forming the second metal plate 2. This integral forming method not only ensures the structural strength of the busbar 10 but also reduces the number of manufacturing steps and lowers manufacturing costs.

[0055] In use, the busbar 10 typically uses the first metal plate 1 to connect to the battery cell 110, while the second metal plate 2 connects to the battery management system module, thus establishing an electrical connection between the battery cell 110 and the battery management system module. This allows the battery management system module to control the battery cell 110. The second metal plate 2 can be used for direct or indirect connection to the battery management system module.

[0056] More specifically, the first metal plate 1 includes a first connecting segment 11 and a second connecting segment 13, which are sequentially distributed along a second direction. The second direction differs from the first direction; specifically, the second direction intersects the first direction. Optionally, the second direction is perpendicular to the first direction. For example, please refer to [reference needed]. Figure 2 and Figure 4 The first direction is the Y-axis direction, and the second direction is the X-axis direction. The first connecting segment 11 and the second connecting segment 13 on the first metal plate 1 are both connected to the second metal plate 2.

[0057] When the first metal plate 1 is used to connect the battery cells 110, specifically, the first metal plate 1 is used to connect two battery cells 110. The first connecting segment 11 of the first metal plate 1 is used to connect with one of the battery cells 110, and the second connecting segment 13 is used to connect with the other battery cell 110, thereby achieving series or parallel connection between the two battery cells 110. Since both the first connecting segment 11 and the second connecting segment 13 on the first metal plate 1 are connected to the second metal plate 2, current can flow not only between the first connecting segment 11 and the second metal plate, but also between the second connecting segment 13 and the second metal plate 2. Compared to… Figure 1 The bus 10' shown in this embodiment increases the current flow path and increases the current-carrying area, which can reduce the risk of overheating of the bus 10.

[0058] In summary, the busbar 10 provided in this embodiment can be connected to the battery cell 110 using the first metal plate 1, while the second metal plate 2 can be used to connect to the battery management system module. The first connecting segment 11 and the second connecting segment 13 on the first metal plate 1 are used to connect different battery cells 110. Since both the first connecting segment 11 and the second connecting segment 13 are connected to the second metal plate 2, the current can flow directly between the first connecting segment 11 and the second metal plate, and also directly between the second connecting segment 13 and the second metal plate 2. This increases the current flow path and current-carrying area on the busbar 10, improves the current-carrying capacity of the busbar 10, and reduces the risk of overheating of the busbar 10.

[0059] In some implementations, please refer to Figure 2 and Figure 9 The first metal plate 1 also includes a buffer section 12, which is connected between the first connecting section 11 and the second connecting section 13.

[0060] As can be seen, the first metal plate 1 includes a first connecting segment 11, a buffer segment 12, and a second connecting segment 13, which are connected sequentially along a second direction. The buffer segment 12 typically has a certain elastic deformation capacity and is located between the first connecting segment 11 and the second connecting segment 13. The buffer segment 12 can be used to buffer the displacement between the first connecting segment 11 and the second connecting segment 13 in the second direction. Optionally, the buffer segment 12 extends along a first direction.

[0061] When the first connecting segment 11 and the second connecting segment 13 of the first metal plate 1 are used to connect different battery cells 110, when the center distance between the two connected battery cells 110 changes, for example, when the battery cells 110 expand and the center distance between them increases, the relative displacement between the first connecting segment 11 and the second connecting segment 13 will also occur. The buffer segment 12 can adapt to deformation, thereby buffering the movement between the first connecting segment 11 and the second connecting segment 13 and reducing the risk of damage to the first metal plate 1 or the battery cells 110.

[0062] In some implementations, please refer to Figure 2 and Figure 9 The busbar 10 is provided with a cutting section 3 adjacent to the buffer section 12. The cutting section 3 is used to cut off the connection between the buffer section 12 and the second metal plate 2.

[0063] Since the first metal plate 1 and the second metal plate 2 are integrally formed and set at an angle, and a buffer section 12 is also formed on the first metal plate 1, such a setting will greatly increase the difficulty of forming the busbar 10.

[0064] Therefore, in this embodiment, a cutting portion 3 is provided on the busbar 10. The cutting portion 3 is adjacent to the buffer section 12 and is used to cut off the connection between the buffer section 12 and the second metal plate 2. That is, the buffer section 12 and the second metal plate 2 are not directly connected. Usually, the cutting portion 3 is a dotted portion; for example, the cutting portion 3 can be a notch 31 or a slit. Optionally, the width W3 of the cutting portion 3 is greater than or equal to the width W2 of the buffer section 12. Since the connection between the buffer section 12 and the second metal plate 2 on the first metal plate 1 is cut off by the cutting portion 3, the buffer section 12 and the second metal plate 2 are relatively independent. This can alleviate the stress concentration problem caused by the forming of the buffer section 12 and the second metal plate 2, thereby reducing the manufacturing difficulty of the busbar 10.

[0065] As an example, the forming process of busbar 10 includes: providing a metal mother plate and cutting a cutting portion 3 on the metal mother plate; performing a first stamping process on the metal mother plate to form a first metal plate 1 and a second metal plate 2; and performing a second stamping process on the metal mother plate to form a buffer section 12. It should be noted that since the cutting portion 3 is formed first, the order of the first stamping process and the second stamping process can be varied. For example, the first stamping process can be performed first, followed by the second stamping process; or the second stamping process can be performed first, followed by the first stamping process.

[0066] In some implementations, please refer to Figure 2 and Figure 9 The cut-off portion 3 is a notch 31, which is formed on the first metal plate 1 and / or the second metal plate 2, extending at least to the connection between the first metal plate 1 and the second metal plate 2. The notch 31 not only effectively severs the connection between the buffer section 12 and the second metal plate 2, but also increases the elastic deformation capability of the second metal plate 2, thereby allowing the buffer section 12 to more effectively perform its buffering function. For example, please refer to... Figure 2 The notch 31 is mainly formed on the second metal plate 2 and partially extends into the first metal plate 1. See also [example description needed]. Figure 9 The notch 31 is formed on the first metal plate 1 and extends to the edge of the second metal plate 2.

[0067] In some embodiments, the cutting portion 3 may also be a cutting slit that extends along the boundary line between the first metal plate 1 and the second metal plate 2 and partially severs the connection between the first metal plate 1 and the second metal plate 2.

[0068] In some implementations, please refer to Figure 2 , Figure 3 and Figure 8The buffer section 12 is an arched structure 121 formed by partially bending the first metal plate 1. That is, a portion of the first metal plate 1 is recessed from one side to the other, thus forming a groove 122 on one side and a protrusion, i.e., the arched structure 121, on the other side. Optionally, the arched structure 121 is formed by a partial recess on the side of the first metal plate 1 facing the second metal plate 2. Of course, the arched structure 121 can also be formed by a partial recess on the side of the first metal plate 1 facing away from the second metal plate 2. The arched structure 121 of the buffer section 12 is not only simple in structure but also easy to manufacture. As an example, the arched structure 121 is obtained by stamping the first metal plate 1.

[0069] In some implementations, please refer to Figure 8 The arched structure 121 has an arc-shaped cross-section along the thickness direction of the first metal plate 1. That is, the arched structure 121 extends from the first connecting section 11 in an arc shape to the second connecting section 13. Optionally, the cross-section of the arched structure 121 along the thickness direction of the first metal plate 1 is semi-circular or approximately semi-circular. This arrangement allows the arched structure 121 to not only have good elastic deformation capacity but also reduce the risk of stress concentration. In other embodiments, the cross-section of the arched structure 121 along the thickness direction of the first metal plate 1 can also be designed as an inverted V-shape, etc.

[0070] In some implementations, please refer to Figure 7 and Figure 8 The height H1 of the arched structure 121 protruding from the surface of the first connecting section 11 is 0.9mm to 1.1mm. If the height H1 of the arched structure 121 is too low, its elastic deformation capacity will be poor, and its cushioning performance will be inadequate. As an example, the height H1 is 0.90mm, 0.95mm, 1.00mm, 1.05mm, or 1.10mm.

[0071] In some implementations, please refer to Figure 7 and Figure 8 The thickness D1 of the arched structure 121 is 1.4mm to 1.6mm. If the thickness D1 of the arched structure 121 is too large, its elastic deformation capacity will be poor, resulting in inadequate cushioning performance; conversely, if the thickness D1 of the arched structure 121 is too small, it will reduce the mechanical strength of the arched structure 121. For example, the thickness D1 is 1.4mm, 1.45mm, 1.5mm, 1.55mm, or 1.6mm. Optionally, the thickness D1 of the arched structure 121 is less than the thickness D2 of the first connecting segment 11. For example, the ratio of the thickness D1 of the arched structure 121 to the thickness D2 of the first connecting segment 11 is less than 1, for example, it can be 0.7, 0.8, 0.9, 0.95, or 0.99.

[0072] In some implementations, please refer toFigure 4 In the second direction, the ratio of the width W3 of the cut-off portion 3 to the width W2 of the buffer section 12 is 1.2 to 1.4. In the second direction, the width W3 of the cut-off portion 3 refers to the distance between the opposite sides of the cut-off portion 3. As an example, the cut-off portion 3 is a notch 31, and the width of the notch 31 is the distance between the opposite sides of the notch 31 in the second direction. In the second direction, the width W2 of the buffer section 12 refers to the distance between the opposite sides of the buffer section 12. That is, the width W3 of the cut-off portion 3 is greater than the width W2 of the buffer section 12. As an example, the ratio of W3 to W2 is 1.2, 1.25, 1.3, 1.35, or 1.4. Within this range, the busbar 10 has both good flow capacity and buffering capacity.

[0073] In some implementations, please refer to Figure 4 In the second direction, the ratio of the width W4 of the second metal plate 2 to the width W1 of the first metal plate 1 is 1 to 1.2. In the second direction, the width W4 of the second metal plate 2 refers to the distance between its two opposite sides. In the second direction, the width W1 of the first metal plate 1 refers to the distance between its two opposite sides. That is, the width W4 of the second metal plate 2 is not less than the width W1 of the first metal plate 1. This effectively ensures the current-carrying capacity of the busbar 10. For example, the ratio of W4 to W1 can be 1, 1.05, 1.1, 1.15, or 1.2.

[0074] In some implementations, please refer to Figure 4 In the second direction, the ratio of the width W3 of the cut-off portion 3 to the width W4 of the second metal plate 2 is 0.2 to 0.25. For example, the ratio of W3 to W4 is 0.2, 0.21, 0.22, 0.23, 0.24, or 0.25. Within this range, the busbar 10 exhibits both good current-carrying capacity and buffering capacity.

[0075] In some implementations, please refer to Figure 4 In the second direction, the ratio of the width W2 of the buffer section 12 to the width W1 of the first metal plate 1 is 0.14 to 0.18. As an example, the ratio of W2 to W1 is 0.14, 0.15, 0.16, 0.17, or 0.18. Within this range, the busbar 10 has both good buffering capacity and mechanical strength.

[0076] In some implementations, please refer to Figure 2The busbar 10 also includes a third metal plate 4, which is located on the side of the second metal plate 2 away from the first metal plate 1. The third metal plate 4 is integrally formed with the second metal plate 2, and the third metal plate 4 and the second metal plate 2 are set at an angle. Along the first direction, the first metal plate 1, the second metal plate 2, and the third metal plate 4 are connected sequentially, with the second metal plate 2 located between the first metal plate 1 and the third metal plate 4. The third metal plate 4 is integrally formed with the second metal plate 2, that is, the first metal plate 1, the second metal plate 2, and the third metal plate 4 are integrally formed. The third metal plate 4 is set at an angle with the second metal plate 2, but the third metal plate 4 and the first metal plate 1 can be parallel or inclined. The third metal plate 4 is used to connect to the battery management system module, that is, the second metal plate 2 is indirectly connected to the battery management system module through the third metal plate 4.

[0077] In some implementations, please refer to Figure 6 The included angle α between the first metal plate 1 and the second metal plate 2 is 90° to 120°. As an example, the included angle α is 90°, 95°, 100°, 105°, 110°, 115° or 120°.

[0078] In some implementations, please refer to Figure 6 The included angle β between the third metal plate 4 and the second metal plate 2 is 90° to 120°. As an example, the included angle β is 90°, 95°, 100°, 105°, 110°, 115° or 120°.

[0079] In some implementations, please refer to Figure 2 The first connecting segment 11 has a first connecting hole 111. The first connecting segment 11 can be connected to the battery cell 110 through the first connecting hole 111. As an example, the first connecting hole 111 is a through hole.

[0080] In some implementations, please refer to Figure 2 The second connecting segment 13 has a second connecting hole 131. The second connecting segment 13 can be connected to the battery cell 110 through the second connecting hole 131. As an example, the second connecting hole 131 is a through hole.

[0081] In some implementations, please refer to Figure 2 The third metal plate 4 has a third connection hole 41. The third metal plate 4 can be connected to the battery management system module through the third connection hole 41. As an example, the third connection hole 41 is a through hole.

[0082] In some implementations, please refer to Figure 5 and Figure 6In the direction from the first metal plate 1 to the third metal plate 4, the second metal plate 2 includes a first arc-shaped segment 21, a straight segment 22, and a second arc-shaped segment 23 connected in sequence. The first arc-shaped segment 21 is connected to the first metal plate 1, and the second arc-shaped segment 23 is connected to the third metal plate 4. This arrangement can reduce the risk of stress concentration on the second metal plate 2 and improve the strength of the busbar 10.

[0083] Secondly, please see Figure 10 This application provides a battery 100, which includes a plurality of battery cells 110 assembled together and a busbar 10, wherein a first connecting segment 11 and a second connecting segment 13 in the busbar 10 are respectively connected to two adjacent battery cells 110.

[0084] Cell 110, also known as a battery cell, is the basic unit for converting chemical energy into electrical energy. Optionally, cell 110 is a rechargeable cell, which can realize the interconversion of chemical energy and electrical energy.

[0085] The battery 100 can be used to power electrical devices. These electrical devices include, but are not limited to, at least one of vehicles and processing tools. For example, vehicles include vehicles, aircraft, etc.; processing tools include electric drills, electric screwdrivers, etc.

[0086] The battery 100 includes the busbar 10 described above, and therefore the battery 100 has all the beneficial effects of the busbar 10 described above, which will not be elaborated here.

[0087] In some embodiments, the battery 100 includes a battery management system module, and the second metal plate 2 is connected to the battery management system module. The battery management system module includes a circuit board and a BMS (Battery Management System) chip disposed on the circuit board.

[0088] In some embodiments, battery 100 includes at least one of battery module and battery pack.

[0089] In some implementations, the battery pack is a low-voltage battery pack with an output voltage less than or equal to 48V. For example, battery pack 100 may be a 12V low-voltage battery pack, a 24V low-voltage battery pack, or a 48V low-voltage battery pack.

[0090] In some implementations, the low-voltage battery pack is a starter battery pack. A starter battery pack, also known as a starting power supply, is a power source used to provide initial power to a device or system to start it up. As an example, a starter battery pack includes an automotive starter power supply.

[0091] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A busbar (10), characterized in that, It includes a first metal plate (1) and a second metal plate (2) that are sequentially connected and integrally formed along a first direction, wherein the first metal plate (1) and the second metal plate (2) are arranged at an angle; the first metal plate (1) includes a first connecting segment (11) and a second connecting segment (13) that are sequentially distributed along a second direction, wherein the second direction intersects the first direction; both the first connecting segment (11) and the second connecting segment (13) are connected to the second metal plate (2).

2. The busbar (10) according to claim 1, characterized in that, The first metal plate (1) further includes a buffer section (12) connected between the first connecting section (11) and the second connecting section (13).

3. The busbar (10) according to claim 2, characterized in that, The busbar (10) is provided with a cutting section (3) adjacent to the buffer section (12), and the cutting section (3) is used to cut off the connection between the buffer section (12) and the second metal plate (2).

4. The busbar (10) according to claim 3, characterized in that, The cut-off portion (3) is a notch (31), which is formed on the first metal plate (1) and / or the second metal plate (2), and the notch (31) extends at least to the connection between the first metal plate (1) and the second metal plate (2).

5. The busbar (10) according to claim 2, characterized in that, The buffer section (12) is an arched structure (121) formed by partially bending the first metal plate (1).

6. The busbar (10) according to claim 5, characterized in that, The arched structure (121) has an arc-shaped cross-section along the thickness direction of the first metal plate (1); and / or, The height H1 of the arched structure (121) protruding from the surface of the first connecting section (11) is 0.9 mm to 1.1 mm; and / or, The thickness D1 of the arch structure (121) is 1.4mm to 1.6mm.

7. The busbar (10) according to claim 3, characterized in that, In the second direction, the ratio of the width W3 of the cut-off portion (3) to the width W2 of the buffer segment (12) is 1.2 to 1.4; and / or, In the second direction, the ratio of the width W4 of the second metal plate (2) to the width W1 of the first metal plate (1) is 1 to 1.2; and / or, In the second direction, the ratio of the width W3 of the cut portion (3) to the width W4 of the second metal plate (2) is 0.2 to 0.25; and / or, In the second direction, the ratio of the width W2 of the buffer section (12) to the width W1 of the first metal plate (1) is 0.14 to 0.

18.

8. The busbar (10) according to any one of claims 1 to 7, characterized in that, The busbar (10) also includes a third metal plate (4), which is located on the side of the second metal plate (2) away from the first metal plate (1). The third metal plate (4) is integrally formed with the second metal plate (2) and the third metal plate (4) is set at an angle to the second metal plate (2).

9. The busbar (10) according to claim 8, characterized in that, The included angle α between the first metal plate (1) and the second metal plate (2) is 90° to 120°; and / or, The included angle β between the third metal plate (4) and the second metal plate (2) is 90° to 120°; and / or, The first connecting segment (11) is provided with a first connecting hole (111); and / or, The second connecting segment (13) is provided with a second connecting hole (131); and / or, The third metal plate (4) has a third connecting hole (41).

10. The busbar (10) according to claim 8, characterized in that, In the direction from the first metal plate (1) to the third metal plate (4), the second metal plate (2) includes a first arc segment (21), a straight segment (22) and a second arc segment (23) connected in sequence. The first arc segment (21) is connected to the first metal plate (1), and the second arc segment (23) is connected to the third metal plate (4).

11. A battery (100), characterized in that, The device includes multiple battery cells (110) assembled together and a busbar (10) as described in any one of claims 1 to 10, wherein the first connecting segment (11) and the second connecting segment (13) on the busbar (10) are respectively connected to two adjacent battery cells (110).

12. The battery (100) according to claim 11, characterized in that, The battery (100) includes a battery management system module, and the second metal plate (2) is connected to the battery management system module.

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