Connecting assembly, battery module, battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a connecting assembly, a battery module, a battery pack and electric equipment, a connecting row comprises a first connecting row and a second connecting row, the first connecting row is provided with a connecting end face and a first pre-tightening position, the second connecting row is provided with a second pre-tightening position, and the second connecting row is suitable for abutting against the connecting end face; the first connecting row is further connected with a limiting part, the limiting part is located on the side, back to the connecting end face, of the first connecting row, and when the second connecting row abuts against the end face, back to the connecting end face, of the first connecting row, the limiting part is suitable for preventing the first pre-tightening position from being aligned with the second pre-tightening position. Dislocation welding of the connecting bar can be effectively prevented, and the phenomenon of pseudo soldering is not prone to occurring when the connecting bar is welded.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a connection component, battery module, battery pack and electrical device. Background Technology

[0002] In recent years, with the rapid development and popularization of new energy vehicles, the application of batteries has become increasingly widespread. As the power source for automobiles and other electrical equipment, batteries play an irreplaceable role. During battery use, it is necessary to collect data such as battery voltage, current, and temperature. Furthermore, electrical connections are established between the battery pack and the electrical components in the device. Connector pins are needed for data acquisition from the battery and for connecting electrical components. Typically, both components that need to be connected are connected to connector pins, and then the connector pins on the two components are connected together.

[0003] In related technologies, the connecting bars on two components are welded together by a welding process. However, during welding, the welding position is prone to misalignment, which can lead to poor soldering at the welding position of the two connecting bars, insufficient current flow area at the welding point, increased internal resistance, and excessively high component temperature. Utility Model Content

[0004] This application provides a connection component, a battery module, a battery pack, and an electrical device, which can effectively prevent misaligned welding of the connection pins and ensure that the phenomenon of cold solder joints is not easily caused during the welding of the connection pins.

[0005] A first aspect of this application provides a connecting assembly, including a first connecting row and a second connecting row. The first connecting row has a connecting end face and a first pre-tightening position, and the second connecting row has a second pre-tightening position. The second connecting row is adapted to abut against the connecting end face to align the first pre-tightening position and the second pre-tightening position. The thickness of the first connecting row is greater than the thickness of the second connecting row. The first connecting row is also connected to a limiting portion. When the second connecting row abuts against the end face of the first connecting row facing away from the connecting end face, the limiting portion is adapted to prevent the alignment of the first pre-tightening position and the second pre-tightening position.

[0006] In one possible implementation, the first connecting row includes a first row body and a first connecting end, with a connecting end face and a first pre-tightening position both disposed on the first connecting end, and a limiting part connected to the end of the first connecting end that is close to or far from the first row body.

[0007] In one possible implementation, the first row body and the first connecting end are spaced apart, the limiting part is located between the first row body and the first connecting end, and the two ends of the limiting part are respectively connected to the first connecting end and the first row body.

[0008] In one possible implementation, the length direction of the first row is parallel to the length direction of the first connecting end.

[0009] In one possible implementation, the first row body and the first connecting end are connected, the limiting part is connected to the end of the first connecting end away from the first row body, and the limiting part is bent relative to the first connecting end in a direction away from the connecting end face.

[0010] In one possible implementation, the second connecting row includes a second row body and a second connecting end, the second connecting end being connected to one end of the second row body, and a second pre-tightening position being provided at the second connecting end.

[0011] In one possible implementation, a first connection position is provided on the first connection end, which constitutes a first pre-tightening position, and a second connection position is provided on the second connection end, which constitutes a second pre-tightening position.

[0012] In one possible implementation, the connecting strip further includes a preload member, which is adapted to be simultaneously connected to the first connecting position and the second connecting position when the first connecting position and the second connecting position are aligned.

[0013] In one possible implementation, when the first connecting row is connected to the second connecting row via a first pre-tightening position and a second pre-tightening position, the length direction of the second row is parallel or perpendicular to the length direction of the first row.

[0014] In one possible implementation, when the length direction of the second row is parallel to the length direction of the first row, the distance A between the center of the second connecting position and the end face of the second connecting end away from the second row along the length direction of the second row, and the distance B between the center point of the first connecting position and the surface of the limiting part along the length direction of the first row, and the distances A and B satisfy: A > B.

[0015] In one possible implementation, when the length direction of the second row is perpendicular to the length direction of the first row, the distance from the center of the second connecting position to the end face of the second connecting end away from the second row along the width direction of the second row is C, and the distance from the center of the first connecting position to the surface of the limiting part along the reverse length of the first row is D. The distances C and D satisfy: C > D.

[0016] In one possible implementation, the length direction of the second connecting end is parallel to the length direction of the second row of bodies.

[0017] In one possible implementation, the length direction of the second connecting end and the length direction of the second row of bodies are set at an angle.

[0018] In one possible implementation, the angle between the length direction of the second connecting end and the length direction of the second row body is X. In another possible implementation, the thickness of the first row body is X, and the distance between the end of the limiting part used to connect with the first connecting end and the end of the limiting part facing away from the connecting end is E. X and E satisfy: E≥2X.

[0019] In one possible implementation, the limiting part is located on the side of the first connecting row facing away from the connecting end face.

[0020] A second aspect of this application provides a battery module including the aforementioned connection components.

[0021] A third aspect of this application provides a battery pack, including the connection component described above, or the battery module described above.

[0022] A third aspect of this application provides an electrical device, including an electrical appliance, the aforementioned connection component, or the aforementioned battery module, or the aforementioned battery pack.

[0023] According to the connecting component of the first aspect of this application, a limiting part is provided on the first connecting bar. When the second connecting bar abuts against the end face of the first connecting bar facing away from the connecting end face, that is, when the connection positions of the second connecting bar and the first connecting bar are misaligned, the limiting part can prevent the first pre-tightening position and the second pre-tightening position from aligning. This prevents the first connecting bar and the second connecting bar from being pre-connected, thus preventing the first connecting bar and the second connecting bar from being connected together in the wrong connection position. This ensures the accuracy of the connection position of the first connecting bar and the second connecting bar, thereby ensuring that the second connecting bar and the first connecting bar are not prone to cold solder joints at the preset penetration depth, increasing the flow area of ​​the welding point and reducing the internal resistance. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 An exploded view of a connection assembly provided according to some embodiments of this application is shown;

[0026] Figure 2 Another exploded view of the connection assembly provided according to some embodiments of this application is shown;

[0027] Figure 3 A schematic diagram of a first structure is shown when the first connecting row and the second connecting row provided in some embodiments of this application are correctly connected;

[0028] Figure 4 A schematic diagram of a first structure is shown when the first connecting row and the second connecting row are misaligned according to some embodiments of this application;

[0029] Figure 5A schematic diagram of a second structure is shown when the first connecting row and the second connecting row provided in some embodiments of this application are correctly connected;

[0030] Figure 6 A schematic diagram of a second structure is shown when the first connecting row and the second connecting row are misaligned according to some embodiments of this application;

[0031] Figure 7 An exploded view of a connection component provided according to some embodiments of this application is shown;

[0032] Figure 8 A schematic diagram of a third structure is shown when the first connecting row and the second connecting row provided in some embodiments of this application are correctly connected;

[0033] Figure 9 A schematic diagram of a third structure is shown when the first connecting row and the second connecting row are misaligned according to some embodiments of this application;

[0034] Figure 10 A schematic diagram of a fourth structure is shown when the first connecting row and the second connecting row provided in some embodiments of this application are correctly connected;

[0035] Figure 11 A schematic diagram of a fourth structure is shown when the first connecting row and the second connecting row are misaligned according to some embodiments of this application.

[0036] Figure label:

[0037] 10. First connecting row; 11. First row body; 12. First connecting end; 121. Connecting end face; 13. Restricting part; 14. First connecting position; 20. Second connecting row; 21. Second row body; 22. Second connecting end; 23. Second connecting position; 30. Pre-tightening member. Detailed Implementation

[0038] In existing technologies, the thickness of the connecting strips on different components can be set differently depending on the actual situation. Some connecting strips used for connection are thicker, while others are thinner. For example, thicker connecting strips are needed in high-current paths to carry more current and reduce heat generation, while thinner connecting strips can be used in low-current areas to save space and cost. Alternatively, the current distribution can be optimized by adjusting the thickness of the connecting strips to avoid the problem of local current overload.

[0039] When thicker and thinner connecting strips are welded together, the end face of the thinner connecting strip in the thickness direction overlaps with the end face of the thicker connecting strip in the thickness direction. The end face of the thinner connecting strip facing away from the thicker connecting strip is the welding area. Riveting holes are provided at the overlap positions of both the thinner and thicker connecting strips. Before welding, the two connecting strips need to be pre-fixed using rivets and rivet holes. When welding the pre-fixed connecting strips, the welding direction is from the thinner connecting strip towards the thicker connecting strip. During welding, the thicker connecting strip is the base material on the lower layer, and the thinner connecting strip is on the upper layer. The upper and lower connecting strips are connected by laser welding to fuse them together, completing the high-pressure connection and ensuring the flow area. When welding two connecting strips, the overlap state of the thin and thick connecting strips needs to be manually checked (the correct state is the thicker connecting strip on the lower layer and the thinner connecting strip on the upper layer). After inspection, pre-positioning is done using rivets, and then laser welding is performed. However, manually judging the upper and lower positions of the thin and thick connecting strips is prone to error. Operator fatigue and attention gradually decrease during work, and because the overall thickness of the connecting strips is very small, misjudgments can occur when visually distinguishing the upper and lower positions of the two connecting strips, making it impossible to guarantee 100% qualified overlap. Before welding, a predetermined penetration depth is set based on the thickness of the thin connecting strip. At this penetration depth, the two connecting strips can be welded together smoothly, and the occurrence of incomplete welds is less likely. If the upper and lower layers are installed in reverse (thin connecting strip on the bottom, thick connecting strip on the top), welding is performed from the thick connecting strip to the thin connecting strip. The thickness of the thick connecting strip easily exceeds the preset penetration depth. Insufficient penetration depth leads to incomplete welds, not only making the weld between the two connecting strips unstable and resulting in poor weld quality, but also causing insufficient flow area at the weld point, thus increasing internal resistance.

[0040] To address these issues, this application provides a connecting component. The connecting component has a limiting part that prevents misalignment. When two connecting strips of different thicknesses are pre-fixed, it can effectively prevent errors in the connection position of the thinner connecting strip and the thicker connecting strip, ensuring the accuracy of the connection position.

[0041] 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.

[0042] See Figures 1 to 3As shown, in some embodiments, this application provides a connection assembly including a first connection bar 10 and a second connection bar 20. The first connection bar 10 and the second connection bar 20 are respectively adapted to connect components. The components connected to each other are electrically connected through the connection between the first connection bar 10 and the second connection bar 20. It should be noted that the thicknesses of the first connection bar 10 and the second connection bar 20 are different; in this application, the thickness of the first connection bar 10 is greater than the thickness of the second connection bar 20.

[0043] To facilitate the connection of the first connecting strip 10 and the second connecting strip 20, the first connecting strip 10 of this application has a connecting end face 121 and a first pre-tightening position, and the second connecting strip 20 has a second pre-tightening position. Since the first connecting strip 10 and the second connecting strip 20 ultimately need to be connected together, for example, some structures of the first connecting strip 10 and the second connecting strip 20 need to be welded together, in order to ensure the correct position between the first connecting strip 10 and the second connecting strip 20 during welding, the first connecting strip 10 and the second connecting strip 20 need to be fixed before welding. For example, the part of the second connecting strip 20 used for welding with the first connecting strip 10 needs to abut against the connecting end face 121 to align the first pre-tightening position and the second pre-tightening position. Then, by connecting the first pre-tightening position and the second pre-tightening position, the first connecting strip 10 and the second connecting strip 20 are relatively fixed.

[0044] The first connecting strip 10 of this application is also connected to a limiting part 13, which is located on the side of the first connecting strip 10 facing away from the connecting end face 121. In this embodiment, the normal connection mode of the first connecting strip 10 and the second connecting strip 20 is when the second connecting strip 20 abuts against the connecting end face 121 and the second connecting strip 20 and the first connecting strip 10 are connected. When the second connecting strip 20 abuts against the end face of the first connecting strip 10 facing away from the connecting end face 121, and the first connecting strip 10 and the second connecting strip 20 are connected at this time, it is an incorrect connection mode. The limiting part 13 of this application is used to prevent the first pre-tightening position and the second pre-tightening position from being aligned when the second connecting strip 20 abuts against the end face of the first connecting strip 10 facing away from the connecting end face 121.

[0045] Before welding the first connecting strip 10 and the second connecting strip 20 of this application, they can be pre-connected through the first pre-tightening position and the second pre-tightening position, so that the second connecting strip 20 is connected to the connecting end face 121 of the first connecting strip 10, thereby fixing the relative position of the first connecting strip 10 and the second connecting strip 20. At this time, welding can be started from the end of the second connecting strip 20 facing away from the connecting end face 121 according to the preset penetration depth, so as to ensure that the penetration depth can be greater than the thickness of the second connecting strip 20, making it less likely for the welding position of the first connecting strip 10 and the second connecting strip 20 to have a false weld, thus ensuring the welding quality.

[0046] When the second connecting strip 20 abuts against the end face of the first connecting strip 10 facing away from the connecting end face 121, and the first connecting strip 10 and the second connecting strip 20 are pre-connected, the thickness of the first connecting strip 10 and the second connecting strip 20 is not easily noticeable to the naked eye, and it is not easy to distinguish that the connection positions of the first connecting strip 10 and the second connecting strip 20 are opposite at this time. When welding the first connecting strip 10 and the second connecting strip 20, welding will start directly from the connecting end face 121 of the first connecting strip 10 toward the second connecting strip 20. Since the penetration depth is preset, and the thickness of the first connecting strip 10 is greater than the thickness of the second connecting strip 20, it is easy for the penetration depth to be insufficient to penetrate the first connecting strip 10 to reach the second connecting strip 20. That is, it is easy for the first connecting strip 10 and the second connecting strip 20 to have a poor weld, resulting in low welding quality and insufficient flow area at the welding point, which leads to an increase in the internal resistance of the first connecting strip 10 and the second connecting strip 20 and easy overheating.

[0047] The first connecting row 10 of this application is provided with a limiting part 13. When the second connecting row 20 abuts against the end face of the first connecting row 10 facing away from the connecting end face 121, that is, when the connection position between the second connecting row 20 and the first connecting row 10 is misaligned, the limiting part 13 can prevent the first pre-tightening position and the second pre-tightening position from aligning. In this way, the first connecting row 10 and the second connecting row 20 cannot be pre-connected, which can prevent the first connecting row 10 and the second connecting row 20 from being connected together in the wrong connection position, ensuring the accuracy of the connection position of the first connecting row 10 and the second connecting row 20. This can ensure that the second connecting row 20 and the first connecting row 10 are not prone to cold welding under the preset penetration depth, increase the flow area of ​​the welding point, ensure welding quality, and reduce internal resistance.

[0048] In some embodiments, the first connecting bar 10 includes a first bar body 11 and a first connecting end 12. The first connecting end 12 is directly or indirectly connected to the first bar body 11. When the first connecting end 12 is directly connected to the first bar body 11, the first connecting end 12 and the first bar body 11 can be integrally formed, or the first connecting end 12 can be connected to the first bar body 11 by welding. When the first connecting end 12 is indirectly connected to the first bar body 11, the first bar body 11 and the first connecting end 12 can be connected by a structure made of conductive material.

[0049] The first connecting end 12 is used to connect to the second connecting row 20. Both the connecting end face 121 and the first pre-tightening position are located on the first connecting end 12. The limiting part 13 is connected to one end of the first connecting end 12 that is close to or far from the first row body 11. It should be noted that the first connecting end 12 has a flat plate structure, with the connecting end face 121 located on one end face in the thickness direction of the first connecting end 12, and the limiting part 13 located on the other end face in the thickness direction of the first connecting end 12. The specific implementation of the limiting part 13 will be described in detail below.

[0050] In some embodiments, the limiting part 13 may be located at one end of the first connecting end 12 near the first row body 11. In this case, the limiting part 13 protrudes from the side of the first connecting end 12 facing away from the connecting end face 121. When the first connecting end 12 and the first row body 11 are directly connected, one end of the limiting part 13 can be fixedly connected to the first connecting end 12 by welding or bonding, or it can be detachably connected to the first connecting end 12 by a snap-fit ​​structure, a clip-fit ​​structure, or a screw. When the first connecting end 12 and the first row body 11 are indirectly connected, in order to save materials and processing steps... The first connecting end 12 and the first row body 11 can be directly connected by the limiting part 13. For example, the two opposite ends of the limiting part 13 can be connected to the first connecting end 12 and the first row body 11 by welding or bonding. Alternatively, to increase production efficiency, the limiting part 13, the first connecting end 12 and the first row body 11 can be integrally formed. In this case, the limiting part 13 is located between the first connecting end 12 and the first row body 11, and the limiting part 13 and the first connecting end 12 can be formed from the entire first row body 11 by stamping or other methods.

[0051] Specifically, in this embodiment, the first row body 11 and the first connecting end 12 are spaced apart along the thickness direction of the first connecting end 12. One end of the first connecting end 12 and one end of the first row body 11 are close to each other. The limiting part 13 is located between the first row body 11 and the first connecting end 12, and the two ends of the limiting part 13 are respectively connected to the ends of the first connecting end 12 and the first row body 11 that are close to each other. At this time, there is a certain angle between the limiting part 13 and the first connecting end 12, and the angle between the two is greater than 0° and less than 180°. There is also a certain angle between the limiting part 13 and the first row body 11, and the angle between the two is greater than 0° and less than 180°. In this embodiment, the angle between the limiting part 13 and the first connecting end 12 and the angle between the limiting part 13 and the first row body 11 are both 90°.

[0052] In this embodiment, the length direction of the first row body 11 is parallel to the length direction of the first connecting end 12, or the length direction of the first row body 11 can be perpendicular to the length direction of the first connecting end 12, or the angle between the length direction of the first row body 11 and the length direction of the first connecting end 12 is any angle between 90° and 180°, which needs to be determined according to the actual installation requirements. This application uses the example of the length direction of the first row body 11 being parallel to the length direction of the first connecting end 12 for illustration.

[0053] See Figures 1 to 3As shown, when the second connecting row 20 needs to be connected to the first connecting row 10, the end face of the second row body 21 with the second pre-tightening position needs to be abutted against the connecting end face 121 of the first connecting end 12, and then the first pre-tightening position and the second pre-tightening position are aligned and set, and the first connecting row 10 and the second connecting row 20 are connected to the first pre-tightening position and the second pre-tightening position through the connecting structure, so as to pre-fix the first connecting row 10 and the second connecting row 20.

[0054] In some embodiments, the second connecting row 20 includes a second row body 21 and a second connecting end 22, the second connecting end 22 being connected to one end of the second row body 21, and a second pre-tightening position being disposed on the second connecting end 22. The second connecting end 22 and the second row body 21 can be two separate structures, which can be connected together by adhesive or welding, or by a snap-fit ​​structure, fastening structure, or screws; in addition, the second connecting end 22 and the second row body 21 can also be an integrally formed structure.

[0055] The second connecting end 22 of this application is a plate-shaped structure. When it is necessary to pre-fix the connection between the first row 11 and the second row 21, one side of the second connecting end 22 in the thickness direction is attached to the connecting end face 121 of the first connecting end 12, and then the first pre-tightening position and the second pre-tightening position are aligned.

[0056] In some embodiments, a first connecting end 12 is provided with a first connecting position 14, which extends through the first connecting end 12 from the connecting end face 121 along the thickness direction of the first connecting end 12 and is adapted to form a first pre-tightening position. A second connecting end 22 is provided with a second connecting position 23, which extends through the second connecting end 22 from one end face in the thickness direction to the other end face and is adapted to form a second pre-tightening position. When the second connecting end 22 and the connecting end face 121 are fitted together, the first connecting position 14 and the second connecting position 23 need to be aligned.

[0057] It is worth mentioning that the first connecting position 14 and the second connecting position 23 can be circular holes or square holes, etc. In this embodiment of the application, the first connecting position 14 and the second connecting position 23 are circular holes as an example for explanation. The diameters of the holes of the first connecting position 14 and the second connecting position 23 are equal. When the center of the hole of the first connecting position 14 and the center of the hole of the second connecting position 23 coincide along the thickness direction of the first connecting end 12 and the second connecting end 22, the alignment of the first connecting position 14 and the second connecting position 23 is satisfied.

[0058] In some embodiments, the connecting strip further includes a pre-tightening member 30. When the first connecting position 14 and the second connecting position 23 are aligned, the pre-tightening member 30 is adapted to be simultaneously connected to the first connecting position 14 and the second connecting position 23 to pre-fix the first connecting end 12 and the second connecting end 22. The pre-tightening member 30 in this application is a screw structure, and the first connecting position 14 and the second connecting position 23 are threaded holes. The pre-tightening member 30 can be threadedly connected to the first connecting position 14 and the second connecting position 23 to connect the first connecting end 12 and the second connecting end 22.

[0059] When the first connecting end 12 and the second connecting end 22 of this application are connected, the relative positions of the first connecting row 10 and the second connecting row 20 need to be determined according to the actual connection space. Since the length of the first connecting end 12 is smaller than the length of the first row body 11, and the length of the second connecting end 22 is smaller than the length of the second row body 21, the overall length direction of the first connecting row 10 is approximately the length direction of the first row body 11, and the overall length direction of the second connecting row 20 is approximately the length direction of the second row body 21. When the first connecting end 12 and the second connecting end 22 are connected, the relative positional relationship between the first connecting row 10 and the second connecting row 20 can be reflected by the angle between the length direction of the first row body 11 and the length direction of the second row body 21. For example, the angle between the first row body 11 and the second row body 21 satisfies greater than or equal to 90° and less than or equal to 180°. In this embodiment of the application, the angle between the first row 11 and the second row 21 is either 90° or 180°. When the angle between the length directions of the first row 11 and the second row 21 is 180°, the first row 11 and the second row 21 are parallel. When the length directions of the first row 11 and the second row 21 are 90°, the first row 11 and the second row 21 are perpendicular.

[0060] In some embodiments, when the first connecting end 12 and the second connecting end 22 are connected, and it is necessary to make the length direction of the second row body 21 parallel to the length direction of the first row body 11, the distance from the center of the second connecting position 23 to the end face of the second connecting end 22 away from the second row body 21 along the length direction of the second row body 21 is A, and the distance from the center point of the first connecting position 14 to the surface of the limiting part 13 along the length direction of the first row body 11 is B, satisfying A > B.

[0061] It is understandable that if the connection positions of the first connecting end 12 and the second connecting end 22 are accurate, see [reference needed]. Figure 3 As shown, at this time, the end face of the second connecting end 22 is attached to the connecting end face 121. In this way, the first connecting position 14 and the second connecting position 23 can be successfully aligned by adjusting the position of the second connecting end 22 relative to the first connecting end 12.

[0062] See Figure 4As shown in the figure, the dashed line N is the center line passing through the center of the first connecting position 14, and the dashed line M is the center line passing through the center of the second connecting position 23. When the connection position of the first connecting end 12 and the second connecting end 22 is inaccurate, for example, if the end face of the second connecting end 22 is attached to the side of the first connecting end 12 facing away from the connecting end face 121, the end face of the second connecting end 22 facing away from the second row 21 abuts against the end face of the limiting part 13 facing the first connecting end 12. However, since A > B, when the length direction of the first row 11 and the length direction of the second row 21 are set parallel, the center of the hole of the first connecting position 14 and the second connecting position 23 cannot be aligned. M and N are misaligned, which makes it impossible for the first connecting end 12 and the second connecting end 22 to be pre-fixed smoothly. Therefore, the limiting part 13 can serve to remind the first connecting end 12 and the second connecting end 22 of the incorrect connection position.

[0063] See Figure 5 and Figure 6 As shown, when the first connecting end 12 and the second connecting end 22 are connected, and the length direction of the second row 21 is required to be perpendicular to the length direction of the first row 11, the distance from the center of the second connecting position 23 to the end face of the second connecting end 22 away from the second row 21 along the width direction of the second row 21 is C. Conversely, the distance from the center of the first connecting position 14 to the surface of the limiting part 13 along the length of the first row 11 is D, satisfying C > D. It should be understood that the anti-misalignment movement of the limiting part 13 at this time is similar to the anti-misalignment movement when the length direction of the second row 21 is parallel to the length direction of the first row 11, and will not be elaborated further here.

[0064] It should be noted that, see Figure 1 and Figure 2 As shown, in some embodiments, the length directions of the second connecting end 22 and the second connecting row 20 are located in the same plane, and there is an angle between the length direction of the second connecting end 22 and the length direction of the second connecting row 20. The angle satisfies greater than or equal to 90° and less than or equal to 180°. This application uses an angle of 90° or 180° between the length direction of the second connecting end 22 and the length direction of the second connecting row 20 as an example for illustration.

[0065] When the length direction of the second connecting end 22 and the length direction of the second connecting row 20 are 180°, the second connecting end 22 and the second connecting row 20 are parallel. At this time, when the first connecting end 12 and the second connecting end 22 are connected, it is suitable to set the first row body 11 and the second row body 21 in parallel.

[0066] When the angle between the length direction of the second connecting end 22 and the length direction of the second row body 21 is 90°, the second connecting end 22 and the second row body 21 are perpendicular. At this time, when the first connecting end 12 and the second connecting end 22 are connected, it is suitable to set the first row body 11 and the second row body 21 perpendicularly.

[0067] In some embodiments, the first row body 11 is a flat plate structure, and the first connecting end 12 is connected to one end of the first row body 11 along its length, with the thickness direction of the first connecting end 12 parallel to the thickness direction of the first row body 11. When the limiting part 13 is used to connect the first connecting end 12 and the first row body 11, the thickness of the first row body 11 is X, and the distance between the end of the limiting part 13 used to connect with the first connecting end 12 and the end of the limiting part 13 facing away from the connecting end face 121 is E, satisfying E≥2X. Because the thickness of the first connecting row 10 is relatively thin, if the thickness of the limiting part 13 is set too thin, the gap between the first connecting end 12 and the first row body 11 will be too small. When the second connecting end 22 is attached to the end of the first connecting end 12 facing away from the connecting end face 121, the misalignment feeling is not strong, and the misalignment effect cannot be clearly felt, resulting in poor anti-misalignment effect of the limiting part 13. Therefore, the size of the limiting part 13 between the first connecting end 12 and the first row body 11 needs to be set large enough to highlight a clear misalignment feeling when the second connecting end 22 is connected in the wrong position, so as to ensure the anti-misalignment effect.

[0068] See Figure 7 and Figure 8 As shown, in some embodiments, the limiting part 13 of this application may also be located at the end of the first connecting end 12 away from the first row body 11. In this case, the limiting part 13 protrudes from the first connecting end 12 in the direction away from the connecting end face 121. The limiting part 13 may be separately provided from the first connecting end 12. One end of the limiting part 13 is connected to the first connecting end 12 by adhesive or welding, or it may be connected to the first connecting end 12 by a snap-fit ​​structure, a fastening structure or a screw. Alternatively, the limiting part 13 may be integrally formed with the first connecting end 12, that is, the end of the first connecting end 12 away from the first row body 11 is used as the limiting part 13. In this case, the end of the first connecting end 12 away from the first row body 11 needs to be bent away from the connecting end face 121 to form the limiting part 13.

[0069] See also Figures 9 to 11As shown, when the limiting part 13 is located at the end of the first connecting end 12 away from the first row body 11, the connection of the first connecting end 12 and the second connecting end 22 can be divided into the following cases. If the length direction of the second connecting end 22 is parallel to the length direction of the second row body 21, and the first row body 11 and the second row body 21 need to be parallel when the second connecting end 22 is connected to the first connecting end 12, if the connection positions of the first connecting end 12 and the second connecting end 22 are accurate in this case, the first connecting position 14 and the second connecting position 23 can be aligned smoothly. If the second connecting end 22 is attached to the side of the first connecting end 12 facing away from the connecting end face 121, it will be obstructed by the limiting part 13, preventing the second connecting end 22 from aligning with the side of the first connecting end 12 facing away from the connecting end face 121. The first connecting end 22 is attached to one side of the first connecting end 12, serving as a misalignment reminder. If the length direction of the second connecting end 22 is parallel to the length direction of the second row 21, and the second connecting end 22 is connected to the first connecting end 12, the first row 11 and the second row 21 need to be perpendicular. In this case, along the width direction of the second row 21, the distance from the center of the second connecting position 23 to the end face of the second connecting end 22 away from the second row 21 is C. Along the length of the first row 11 in the opposite direction, the distance from the center of the first connecting position 14 to the end face of the limiting part 13 facing the first connecting end 12 is D, which needs to satisfy C > D. If the second connecting end 22 is attached to the side of the first connecting end 12 facing away from the connecting end face 121, it will be obstructed by the limiting part 13, preventing the first connecting position 14 and the second connecting position 23 from being properly aligned, thus serving as a misalignment reminder.

[0070] It is understandable that if the length direction of the second connecting end 22 is perpendicular to the length direction of the second row body 21, when the second connecting end 22 and the first connecting end 12 are connected, the anti-misalignment of the limiting part 13 is similar to that described above, and will not be described in detail here.

[0071] A second aspect of this application also provides a battery module including the aforementioned connection components.

[0072] A third aspect of this application also provides a battery pack, including the aforementioned connection component or battery module.

[0073] A fourth aspect of this application also provides an electrical device, including an electrical appliance, the aforementioned connection component, or the aforementioned battery module, or the aforementioned battery pack.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A connecting component, characterized in that, include: The first connecting row (10) has a connecting end face (121) and a first pre-tightening position; as well as The second connecting row (20) has a second pre-tightening position and is adapted to abut against the connecting end face (121) so that the first pre-tightening position and the second pre-tightening position are aligned. The thickness of the first connecting bar is greater than the thickness of the second connecting bar; The first connecting row (10) is also connected to a limiting part (13). When the second connecting row (20) abuts against the end face of the first connecting row (10) facing away from the connecting end face (121), the limiting part (13) is adapted to prevent the first pre-tightening position and the second pre-tightening position from aligning.

2. The connection component according to claim 1, characterized in that, The first connecting row (10) includes a first row body (11) and a first connecting end (12). The connecting end face (121) and the first pre-tightening position are both disposed on the first connecting end (12). The limiting part (13) is connected to the end of the first connecting end (12) that is close to or far from the first row body (11).

3. The connection component according to claim 2, characterized in that, The first row body (11) and the first connecting end (12) are spaced apart, and the limiting part (13) is located between the first row body (11) and the first connecting end (12), and the two ends of the limiting part (13) are respectively connected to the first connecting end (12) and the first row body (11).

4. The connecting component according to claim 3, characterized in that, The length direction of the first row body (11) is parallel to the length direction of the first connecting end (12).

5. The connecting component according to claim 2, characterized in that, The first row body (11) is connected to the first connecting end (12), and the limiting part (13) is connected to the end of the first connecting end (12) away from the first row body (11), and the limiting part (13) is bent relative to the first connecting end (12) in a direction away from the connecting end face (121).

6. The connecting component according to any one of claims 3-5, characterized in that, The second connecting row (20) includes a second row body (21) and a second connecting end (22). The second connecting end (22) is connected to one end of the second row body (21), and the second pre-tightening position is set at the second connecting end (22).

7. The connecting component according to claim 6, characterized in that, The first connecting end (12) is provided with a first connecting position (14), which constitutes the first pre-tightening position. The second connecting end (22) is provided with a second connecting position (23), which constitutes the second pre-tightening position.

8. The connection component according to claim 7, characterized in that, The connecting assembly further includes a pre-tightening member (30), which is adapted to be connected to both the first connecting position (14) and the second connecting position (23) simultaneously when the first connecting position (14) and the second connecting position (23) are aligned.

9. The connecting component according to claim 7, characterized in that, When the first connecting row (10) is connected to the second connecting row (20) through the first pre-tightening position and the second pre-tightening position, the length direction of the second row body (21) is parallel or perpendicular to the length direction of the first row body (11).

10. The connection component according to claim 9, characterized in that, When the length direction of the second row (21) is parallel to the length direction of the first row (11), along the length direction of the second row (21), the distance from the center of the second connecting position (23) to the end face of the second connecting end (22) away from the second row (21) is A. Along the length direction of the first row (11), the distance from the center point of the first connecting position (14) to the surface of the limiting part (13) is B. The distances A and B satisfy: A > B.

11. The connection component according to claim 9, characterized in that, When the length direction of the second row (21) is perpendicular to the length direction of the first row (11), along the width direction of the second row (21), the distance from the center of the second connecting position (23) to the end face of the second connecting end (22) away from the second row (21) is C. Along the length of the first row (11) in the opposite direction, the distance from the center of the first connecting position (14) to the surface of the limiting part (13) is D. The distances C and D satisfy: C > D.

12. The connection component according to claim 6, characterized in that, The length direction of the second connecting end (22) is parallel to the length direction of the second row (21).

13. The connection component according to claim 6, characterized in that, The length direction of the second connecting end (22) and the length direction of the second row body (21) are set at an angle.

14. The connection component according to claim 13, characterized in that, The angle between the length direction of the second connecting end (22) and the length direction of the second row (21) is 90°.

15. The connection component according to claim 3 or 5, characterized in that, The thickness of the first row body (11) is X, and the distance between the end of the limiting part (13) used to connect with the first connecting end (12) and the end of the limiting part (13) facing away from the connecting end face (121) is E. X and E satisfy: E≥2X.

16. The connecting component according to any one of claims 1-5, characterized in that, The limiting part (13) is located on the side of the first connecting row (10) facing away from the connecting end face (121).

17. A battery module, characterized in that, Includes the connection component as described in any one of claims 1-16.

18. A battery pack, characterized in that, Includes the connection component as described in any one of claims 1-16, or the battery module as described in claim 17.

19. An electrical appliance, characterized in that, It includes an electrical device, a connection component according to any one of claims 1-16, or a battery module according to claim 17, or a battery pack according to claim 18.

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