Busbar assembly and battery pack

Abstract

The utility model provides a busbar assembly and a battery pack, the busbar assembly is used for connecting a detection element, and the busbar assembly comprises a main body part and an elastic sheet. Wherein the elastic piece comprises a fixing part and a clamping part which are connected with each other, the fixing part is connected to the main body part, and the clamping part can move relative to the main body part. And when the detection element is arranged between the clamping part and the main body part, the elastic piece elastically deforms to enable the clamping part and the main body part of the elastic piece to clamp the detection element. By means of the structural design, the technical effects of being simple and reliable in connection and reducing auxiliary procedures can be achieved, rapid connection is achieved, and therefore the technical problem that in the related technology, the process efficiency is low is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly to a bus bar assembly and a battery pack. Background Art

[0002] In the related art, for the monitoring of some working condition information (such as voltage, temperature, humidity, etc.) of a battery pack, for example, the monitoring of the temperature of the battery pack, the temperature acquisition of the batteries in the battery pack is usually realized by means of a dispensing process between a wire harness and an aluminum bar. This design first preliminarily fixes the temperature acquisition wire harness on the surface of the aluminum bar with adhesive tape, and then applies a thermal conductive adhesive at the connection between the wire harness and the aluminum bar. The thermal conductive adhesive mainly plays two roles in the related art. One is to play a role in heat conduction so that the temperature sensing head can fully sense the temperature of the aluminum bar surface, and the other is to play a role in increasing the connection strength. After the above-mentioned preliminary fixing with adhesive tape, and then additionally applying a thermal conductive adhesive for auxiliary heat transfer and strengthening the connection, the dispensing process is limited by the curing time of the glue, which greatly reduces the manufacturing efficiency. Summary of the Utility Model

[0003] An embodiment of the utility model provides a bus bar assembly and a battery pack, which can improve the technical problem of low manufacturing efficiency in the related art.

[0004] In a first aspect, an embodiment of the utility model provides a bus bar assembly, and the bus bar assembly includes: a main body part; a spring piece, the spring piece includes a fixed part and a clamping part connected to each other, the fixed part is connected to the main body part, and the clamping part can move relative to the main body part;

[0005] When a detection element is arranged between the clamping part and the main body part, the spring piece elastically deforms so that the clamping part and the main body part of the spring piece clamp the detection element.

[0006] In an embodiment, the main body part includes a bus bar and a sleeve, and the sleeve is installed on the bus bar; the fixed part of the spring piece is connected to the sleeve; a limiting space is arranged in the sleeve, and the clamping part of the spring piece is arranged in the limiting space to cooperate with the sleeve to limit the detection element located in the limiting space.

[0007] In an embodiment, at least a part of the clamping part protrudes towards or away from the tube wall of the sleeve to form a bending angle,

[0008] When the detection element extends into the limiting space, the angle of the bending angle changes so that the clamping part elastically abuts against the detection element.

[0009] In one embodiment, the clamping portion includes a free end away from the fixing portion. The clamping portion is partially bent away from the pipe wall, and the clamping portion includes an abutting section away from the pipe wall. The abutting section is used to abut against the detection element, and the free end abuts against the pipe wall; or

[0010] The clamping portion is bent towards the pipe wall, and the clamping portion includes an abutting section abutting against the pipe wall. The free end is used to abut against the detection element.

[0011] In one embodiment, the fixing portion includes a first connecting edge and a second connecting edge connected to each other. The first connecting edge is disposed on the side of the pipe wall away from the limiting space, and the second connecting edge is disposed on the other side of the pipe wall towards the limiting space. The first connecting edge and the second connecting edge are arranged opposite to each other. One end of the second connecting edge is connected to the first connecting edge, and the other end of the second connecting edge is connected to the clamping portion.

[0012] In one embodiment, the pipe wall includes a first surrounding wall and a second surrounding wall; wherein, the first surrounding wall is arc-shaped, the second surrounding wall is plate-shaped, and the first surrounding wall and the second surrounding wall are surrounded to form the limiting space; the elastic sheet is disposed on the first surrounding wall, and the second surrounding wall is attached to the bus bar.

[0013] In one embodiment, the elastic sheet and the sleeve are integrally provided.

[0014] In one embodiment, the main body portion includes a bus bar; the fixing portion of the elastic sheet is disposed on the bus bar, and the clamping portion can move relative to the bus bar; when the detection element is disposed between the clamping portion and the bus bar, the clamping portion of the elastic sheet elastically deforms so that the clamping portion and the bus bar clamp the detection element.

[0015] In a second aspect, an embodiment of the present invention provides a battery pack, including: a detection element; a battery pack including a plurality of battery cells; a bus bar assembly, which is the bus bar assembly of the present application; wherein, the main body portion of the bus bar assembly is used for electrically connecting two of the battery cells, and the elastic sheet of the bus bar assembly is disposed on the main body portion and fixes the detection element.

[0016] In one embodiment, the side of the detection element facing the bus bar of the main body portion is a plane and is attached to the bus bar.

[0017] Advantages of the embodiments of the present utility model: In the embodiments of the present utility model, the elastic sheet is provided with a fixing portion and a clamping portion, and the fixing portion is connected to the main body portion, while the clamping portion can move relative to the main body portion. When a detection element is arranged between the clamping portion and the main body portion, the elastic sheet can undergo elastic deformation to clamp the detection element. The cooperation between the elastic sheet and the main body portion can fix the detection element, achieving the technical effects of simple and reliable connection and reduction of auxiliary processes. There is no need for gluing or waiting for the glue to cure, realizing quick connection and high assembly efficiency, thus improving the technical problem of low process efficiency in the related art. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following-described drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a busbar assembly provided by an embodiment of the present application;

[0020] Figure 2 It is an exploded schematic diagram of a busbar assembly provided by one embodiment of the present application;

[0021] Figure 3 It is an exploded schematic diagram of a busbar assembly provided by another embodiment of the present application;

[0022] Figure 4 It is a schematic cross-sectional view of a busbar assembly provided by one embodiment of the present application;

[0023] Figure 5 It is a schematic cross-sectional view of a busbar assembly provided by another embodiment of the present application;

[0024] Figure 6 It is a schematic structural diagram of a busbar provided by an embodiment of the present application;

[0025] Figure 7 It is a schematic structural diagram of a sleeve provided by an embodiment of the present application;

[0026] Figure 8 It is a schematic structural diagram of an elastic sheet provided by one embodiment of the present application;

[0027] Figure 9 It is a schematic structural diagram of an elastic sheet provided by another embodiment of the present application;

[0028] Figure 10 It is a schematic structural diagram of a busbar assembly provided by another embodiment of the present application;

[0029] Figure 11 It is a schematic structural diagram of a bus bar assembly provided by another embodiment of the present application.

[0030] Explanation of reference numerals:

[0031] 1. Bus bar assembly;

[0032] 10. Main body part; 11. Bus bar; 111. Protrusion; 1111. Substrate; 1112. Protruding edge; 112. Cell connection part; 12. Sleeve; 120. Limiting space; 121. First surrounding wall; 122. Second surrounding wall;

[0033] 20. Elastic sheet; 21. Fixing part; 210. Bayonet; 211. First connecting edge; 212. Second connecting edge; 22. Clamping part; 220. Bending angle; 201. Abutting section; 202. Free end; 221. First side; 222. Second side; 223. Third side;

[0034] 30. Detection element. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation terms such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0036] Please refer to Figures 1 to 5 , Figure 1 It is a schematic structural diagram of the bus bar assembly 1 provided by the embodiment of the present application. Figure 2 It is an exploded view of the bus bar assembly 1 provided by an embodiment of the present application. Figure 3 It is an exploded view of the bus bar assembly 1 provided by another embodiment of the present application. Figure 4 It is a sectional view of the bus bar assembly 1 provided by an embodiment of the present application. Figure 5It is a schematic cross-sectional view of the busbar assembly 1 provided by another embodiment of the present application. The busbar assembly 1 provided by the embodiment of the present application is used to connect the detection element 30. Among them, the busbar assembly 1 is used to connect two different battery cells. The detection element 30 can be some sensing elements, or a wire harness for establishing electrical connection with the battery cells, or a wire harness with a sensing element connected to the end. The sensing element is connected to the busbar assembly 1 to sense some physical parameter changes during the operation of the battery cells, such as changes in temperature, voltage, current, resistance, humidity, etc., or for the need of realizing electrical connection, the wire harness is electrically connected to the busbar assembly 1 to input current to the battery cells or output the current of the battery cells outward.

[0037] Specifically, the busbar assembly 1 provided by the embodiment of the present application may include a main body portion 10 and a spring piece 20. Among them, the main body portion 10 is used to electrically connect two battery cells (not shown in the figure), and provide a planar space for connecting the detection element 30. The spring piece 20 is used to generate an elastic force that can bind the detection element 30 to the main body portion 10, so that the detection element 30 can closely adhere to the main body portion 10 to collect some information parameters of the battery cells under working conditions, such as voltage, current, temperature, humidity, etc. The spring piece 20 may include a fixed portion 21 and a clamping portion 22 connected to each other. The fixed portion 21 is connected to the main body portion 10, and the clamping portion 22 is configured to be movable relative to the main body portion 10. When a detection element is disposed between the clamping portion 22 and the main body portion 10, the spring piece 20 elastically deforms so that the clamping portion 22 of the spring piece 20 and the main body portion 10 can clamp the detection element.

[0038] By connecting the fixed portion 21 of the spring piece 20 to the main body portion 10, setting the clamping portion 22 of the spring piece 20 to be movable relative to the main body portion 10, and enabling the spring piece 20 to elastically deform to clamp the detection element 30 when the detection element 30 is disposed between the clamping portion 22 and the main body portion 10, the cooperation between the spring piece 20 and the main body portion 10 can fix the detection element 30. The advantage of such a design is that the connection process of the detection element can be made simpler and more reliable. Since there is no need to apply glue, there is no need to wait for the glue to cure, reducing the auxiliary processes, which is beneficial to realizing quick connection, thereby improving the technical problem of low process efficiency in the related art.

[0039] Please continue to refer to Figures 1 to 5 , the main body portion 10 may include a busbar 11 and a sleeve 12. The sleeve 12 can be installed on the busbar 11 by any suitable connection method. The fixed portion 21 of the spring piece 20 can be disposed on the sleeve 12 by any suitable connection method. A limiting space 120 is provided inside the sleeve 12, and the clamping portion 22 of the spring piece 20 is disposed inside the limiting space 120, so that the clamping portion 22 cooperates with the sleeve 12 to limit the detection element 30 located inside the limiting space 120, thereby preventing the detection element 30 from loosening from the main body portion 10.

[0040] Please refer to Figure 1 and Figure 6 , Figure 6 FIG. 1 is a schematic structural diagram of the bus bar 11 provided by an embodiment of the present application. Specifically, the bus bar 11 is used for electrically connecting two different battery cells. In some embodiments, the bus bar 11 may include a protruding portion 111 and two battery cell connection portions 112. The protruding portion 111 includes a substrate 1111 and two protruding edges 1112. The two protruding edges 1112 are connected to opposite sides of the substrate 1111 and protrude from the substrate 1111 in the same direction. The two battery cell connection portions 112 are located on both sides of the protruding portion 111 and are respectively connected to one end of a protruding edge 1112 away from the substrate 1111. The two battery cell connection portions 112 are used for electrically connecting the electrodes of different battery cells. The sleeve 12 can be welded to the surface of the bus bar 11. For example, in some embodiments, the sleeve 12 can be welded to one of the battery cell connection portions 112 of the bus bar 11. It should be noted that when welding the sleeve 12 to the battery cell connection portion 112, the distance between the sleeve 12 and the welding area of the battery cell connection portion 112 should be avoided from being too small to prevent affecting the convenience of the welding operation between the battery cell connection portion 112 and the battery cell. Similarly, the elastic sheet 20 can also be connected to the sleeve 12 by welding. In the embodiment of the present application, the sleeve 12 and the bus bar 11, as well as the elastic sheet 20 and the sleeve 12, are connected by welding, which can ensure that there is a better connection strength between the sleeve 12 and the bus bar 11, and between the elastic sheet 20 and the sleeve 12, and thus can effectively reduce the situation that the sleeve 12, the elastic sheet 20, and the detection element 30 are easily loosened due to external force pulling. In the specific connection operation process, the detection element 30 can be first inserted into the sleeve 12. During the process of inserting the detection element 30 into the sleeve 12, interference occurs with the clamping portion 22 of the elastic sheet 20. The clamping portion 22 of the elastic sheet 20 thus undergoes elastic deformation to generate an elastic force, so that the detection element 30 can be elastically abutted against the inner wall of the sleeve 12 by the clamping portion 22 of the elastic sheet 20. When the detection element 30 is pulled by an external force, the detection element 30 can generate a large frictional resistance between the inner wall of the sleeve 12 under the abutting action of the clamping portion 22 of the elastic sheet 20, and this frictional resistance can effectively prevent the detection element 30 from loosening from the sleeve 12.

[0041] Please refer to Figure 7 , Figure 7A schematic diagram of the structure of the sleeve 12 provided in an embodiment of the present application. To facilitate the setting of the sleeve 12 on the bus 11 and to enable the detection element 30 extending into the sleeve 12 to form a larger effective collection area, the tube wall of the sleeve 12 may include a first surrounding wall 121 and a second surrounding wall 122, wherein the first surrounding wall 121 may be arc-shaped, the second surrounding wall 122 may be plate-shaped, the first surrounding wall 121 and the second surrounding wall 122 may be connected to form a limited space 120, the spring sheet 20 may be arranged on the first surrounding wall 121, and the second surrounding wall 122 may be attached to the bus 11. In order to adapt to the shape of the sleeve 12, a part of the surface of the detection element 30 can be set to an arc surface adapted to the first surrounding wall 121 of the sleeve 12, and the other part of the surface can be set to a plane adapted to the second surrounding wall 122 of the sleeve 12. When the detection element 30 extends into the limiting space 120 of the sleeve 12, the arc surface of the detection element 30 is opposite to the first surrounding wall 121 of the sleeve 12, and the plane of the detection element 30 is attached to the second surrounding wall 122 of the sleeve 12. Therefore, the relatively arranged arc surface and the first surrounding wall 121 are conducive to improving the amount of information sensed by the detection element 30, thereby improving the sensing accuracy. The adjacent plane and the second surrounding wall 122 can limit the rotational freedom between the detection element 30 and the sleeve 12, ensuring a firm connection between the detection element 30 and the sleeve 12 while increasing the contact area, thereby increasing the friction resistance.

[0042] It is understandable that in some embodiments, an arc-shaped first surrounding wall 121 can also be directly set on the surface of the bus 11. In this embodiment, the arc-shaped first surrounding wall 121 can be set together with the surface of the battery cell connecting part 112 of the bus 11 to form a limiting space 120. After the detection element 30 extends into the limiting space 120, the arc surface of the detection element 30 is opposite to the first surrounding wall 121 of the sleeve 12, and the plane of the detection element 30 can be directly attached to the surface of the battery cell connecting part 112. Alternatively, the side of the battery cell connecting part 112 away from the protrusion 111 can be bent into a curling edge (not shown in the figure). The curling edge is arc-shaped and is set on the side away from the battery cell. It can play the same role as the above-mentioned first surrounding wall 121, that is, the arc-shaped surrounding wall and the bus 11 are integrally formed, and the same technical effect as above can be achieved. In summary, the embodiment of the present application can ensure that the bus assembly and the detection element 30 are securely connected by arranging a structure on the bus surface that is compatible with the outer shape of the detection element 30 so that the bus assembly can form a special fit with the detection element 30. This can not only improve the amount of physical information obtained by the detection element under the working conditions of the battery cell, but also have an anti-fool effect, so that the connection between the detection element 30 and the sleeve 12 is matched.

[0043] It should be noted that the detection element 30 provided in any embodiment of the present application can be a temperature sensing element for collecting the temperature of the battery cell, or other sensing elements for collecting the electrical parameters (such as voltage, current, etc.) of the battery cell. In the description of the present application, taking the detection element 30 as a temperature sensing element for sensing the temperature change of the battery cell as an example, the specific implementation manners of the embodiments of the present application are schematically described. It can be understood that the specific implementation manners when the detection element 30 is other types of sensing elements or the detection element 30 is a wire harness can refer to the relevant descriptions in this specification, and for the sake of saving space, they will not be elaborated in this specification. At the same time, for the convenience of description in the specification, the temperature sensing elements appearing in this specification will continue to use the same reference numerals as the detection element 30.

[0044] Specifically, the temperature sensing element 30 can be a thermistor capable of sensing temperature. A thermistor is a sensor resistor whose resistance value can change with temperature and finally convert the temperature change into an electrical signal change. To accurately obtain the temperature of the battery cell, the sleeve 12 can be made of a material with good thermal conductivity such as aluminum or copper. One end of the elastic piece 20 serves as a fixing portion 21 for connecting with the sleeve 12, and the other end of the elastic piece 20 serves as a clamping portion 22 for extending into the sleeve 12 to tightly attach the thermistor to the inner wall of the sleeve 12. Thus, through the limitation of the detection element 30 by the sleeve 12 and the elastic piece 20, the connection strength between the detection element 30 and the bus bar 11 can be improved, and the situation of the detection element 30 becoming loose can be greatly reduced.

[0045] In some embodiments, the elastic piece 20 and the sleeve 12 can be provided in a split manner, that is, the elastic piece 20 and the sleeve 12 can be two independently designed components, and the elastic piece 20 is arranged on the sleeve 12 in a detachable or non-detachable manner (such as bonding, welding, screwing, etc.). Of course, in some other embodiments, the elastic piece 20 and the sleeve 12 can also be integrally provided, that is, the elastic piece 20 can be set as at least part of the sleeve 12. Such a design method is beneficial to reducing the number of components used, thereby reducing the assembly steps, and there is no problem that the elastic piece 20 falls off due to insufficient connection strength between the elastic piece 20 and the sleeve 12. In the description of the present application, taking the split elastic piece 20 and sleeve 12 as an example, the implementation principle of the bus bar assembly 1 provided in the embodiments of the present application is schematically described. As for the implementation principle of the bus bar assembly 1 with the elastic piece 20 and the sleeve 12 integrally provided, it can refer to the descriptions of the relevant embodiments in this specification, and will not be elaborated in this specification.

[0046] In some embodiments of the present application, both ends of the sleeve 12 in its longitudinal direction can be set as openings, or one end of the sleeve can be set as an opening and the other end as a closed end, and the length of the sleeve 12 is adapted to the length of the temperature sensing element 30. By setting one end of the sleeve 12 as an opening and the other end as a closed end, and adapting the length of the sleeve 12 to the length of the temperature sensing element 30, the beneficial aspect is that it can limit the temperature sensing element 30 from extending into the limiting space 120 from one end of the sleeve 12 and then extending out of the limiting space 120 from the other end of the sleeve 12, thereby preventing the temperature sensing element 30 from reaching the welding area of the battery cell connection part 112, and further ensuring that there is sufficient welding plane space between the battery cell connection part 112 and the battery cell. The sleeve 12 includes a tube wall for enclosing and forming the limiting space 120, the fixing part 21 is connected to the tube wall, the clamping part 22 has elasticity, and the clamping part 22 is arranged in the limiting space 120 to elastically abut the temperature sensing element 30 against the tube wall.

[0047] Please refer to Figure 8 and Figure 9 , Figure 8 FIG. is a schematic structural diagram of the elastic piece 20 provided by an embodiment of the present application, Figure 9 FIG. is a schematic structural diagram of the elastic piece 20 provided by another embodiment of the present application. The elastic piece 20 includes a fixing part 21 and a clamping part 22. To reduce the manufacturing process and improve production and assembly efficiency, in some embodiments, the fixing part 21 and the clamping part 22 of the elastic piece 20 can be integrally formed. Specifically, the fixing part 21 can be provided with a bayonet 210, and the tube wall of the sleeve 12 extends into the bayonet 210 of the fixing part 21, so that the elastic piece 20 can be clamped on the tube wall. The clamping part 22 has the ability of elastic deformation. After the temperature sensing element 30 extends into the sleeve 12, the temperature sensing element 30 interferes with the clamping part 22 located in the sleeve 12, and then the clamping part 22 can be elastically deformed, so that the clamping part 22 abuts the temperature sensing element 30 against the tube wall, and finally the temperature sensing element 30 is constrained in the sleeve 12, thereby achieving the effect of effectively preventing the temperature sensing element 30 from loosening. To enable the clamping part 22 to generate sufficient elastic force to limit the temperature sensing element 30 in the sleeve 12, at least part of the clamping part 22 can protrude towards or away from the tube wall to form a bending angle 220. After the temperature sensing element 30 extends into the limiting space 120, the temperature sensing element 30 interferes with the bending angle 220, and the angle of the bending angle 220 changes, so that the clamping part 22 can elastically abut the temperature sensing element 30.

[0048] Exemplarily, the fixing portion 21 may include a first connecting edge 211 and a second connecting edge 212 connected to each other. Among them, the first connecting edge 211 is provided on the side of the pipe wall facing away from the limiting space 120, and the second connecting edge 212 is provided on the other side of the pipe wall facing the limiting space 120. The first connecting edge 211 and the second connecting edge 212 are arranged opposite to each other, so as to form the above-mentioned bayonet 210 between the first connecting edge 211 and the second connecting edge 212. One end of the second connecting edge 212 is connected to the first connecting edge 211, and the other end of the second connecting edge is connected to the clamping portion 22.

[0049] The clamping portion 22 may include a free end 202 away from the fixing portion 21. The clamping portion 22 is partially bent in a direction away from the pipe wall, and the clamping portion 22 includes an abutting section 201 away from the pipe wall. The abutting section 201 is used to abut against the detection element 30, and the free end 202 abuts against the pipe wall; or the clamping portion 22 is bent in a direction close to the pipe wall, and the clamping portion 22 includes an abutting section 201 abutting against the pipe wall, and the free end 202 is used to abut against the detection element 30.

[0050] Specifically, the clamping portion 22 may include a first side 221, a second side 222, and a third side 223 connected in sequence. Among them, the first side 221 may be connected between the fixing portion 21 (or the second connecting edge 212) and the second side 222, and the third side 223 may be connected to one end of the second side 222 away from the first side 221. The above-mentioned one of the bending angles 220 is formed between the second side 222 and the third side 223. The third side 223 includes an abutting section 201 and a free end 202 arranged opposite to each other. The abutting section 201 is connected to the second side 222, and the free end 202 is arranged away from the second side 222. To reduce stress concentration, in some embodiments, the abutting section 201 may also be designed as an arc segment with a suitable radius. When at least part of the temperature sensing element 30 extends into the limiting space 120, the abutting section 201 or the free end 202 of the third side 223 can be used to abut the temperature sensing element 30 against the pipe wall.

[0051] Please refer to Figure 4 and Figure 8, in some embodiments, the first side 221 may be connected to one end of the second connecting side 212 that is away from the first connecting side 211. The second side 222 may extend from the end of the first side 221 that is away from the fixing portion 21 (or the second connecting side 212) in a direction away from the pipe wall. The third side 223 may extend from the end of the second side 222 that is away from the first side 221 in a direction close to the pipe wall. In this way, a bending angle 220 may be formed between the second side 222 and the third side 223. Among them, the end of the third side 223 for connecting to the second side 222 may be set as the above-mentioned abutting section 201, and the other end of the third side 223 away from the second side 222 may be set as the above-mentioned free end 202. After the temperature sensing element 30 extends into the sleeve 12, the temperature sensing element 30 interferes with the clamping portion 22, and then the first side 221, the second side 222, and the third side 223 of the clamping portion 22 may move closer to the pipe wall. In this case, the abutting section 201 of the clamping portion 22 abuts against the temperature sensing element 30, and the free end 202 of the clamping portion 22 abuts against the pipe wall, so that the included angle formed between the second side 222 and the third side 223 becomes larger. Thus, an elastic force for limiting the temperature sensing element 30 may be generated among the first side 221, the second side 222, and the third side 223. The clamping portion 22 abuts the temperature sensing element 30 against the pipe wall through the elastic force, thereby preventing the temperature sensing element 30 from loosening from the sleeve 12.

[0052] Please refer to Figure 5 and Figure 9 , in other embodiments, the second side 222 may extend from the end of the first side 221 that is away from the fixing portion 21 (or the second connecting side 212) in a direction close to the pipe wall. The third side 223 may extend from the end of the second side 222 that is away from the first side 221 in a direction away from the pipe wall. In this way, the above-mentioned bending angle 220 may also be formed between the second side 222 and the third side 223. Similarly, the end of the third side 223 for connecting to the second side 222 may be set as the above-mentioned abutting section 201, and the other end of the third side 223 away from the second side 222 may be set as the above-mentioned free end 202. After the temperature sensing element 30 extends into the sleeve 12, the temperature sensing element 30 interferes with the clamping portion 22, and then the first side 221, the second side 222, and the third side 223 of the clamping portion 22 may move closer to the pipe wall. In this case, the abutting section 201 of the clamping portion 22 abuts against the pipe wall, and the free end 202 of the clamping portion abuts against the temperature sensing element 30, so that the included angle formed between the second side 222 and the third side 223 becomes larger. Thus, an elastic force for limiting the temperature sensing element 30 may be generated among the first side 221, the second side 222, and the third side 223. The clamping portion 22 abuts the temperature sensing element 30 against the pipe wall through the elastic force, thereby preventing the temperature sensing element 30 from loosening from the sleeve 12.

[0053] Please refer to Figure 10 and Figure 11 ,Figure 10 is a structural schematic diagram of a busbar assembly 1 provided in another embodiment of the present application, Figure 11 : is a schematic diagram of the structure of the bus assembly 1 provided in another embodiment of the present application. As some alternative implementations, the bus assembly 1 may also only include the bus 11. In this embodiment, the bus assembly 1 is the bus 11, and the fixing portion 21 of the spring 20 may be directly arranged on the bus 11. For example, the fixing portion 21 of the spring 20 is connected to one of the battery cell connection portions 112 of the bus 11, and the clamping portion 22 of the spring 20 is able to move relative to the bus 11 (or the battery cell connection portion 112). When the temperature sensing element 30 is arranged between the clamping portion 22 and the bus 11 (or the battery cell connection portion 112), the clamping portion 22 of the spring 20 undergoes elastic deformation, so that the clamping portion 22 and the bus 11 (or the battery cell connection portion 112) can be clamped. Temperature element 30, or, in other embodiments, the fixing portion 21 of the spring 20 can also be connected to the protruding portion 111. In specific operation, the fixing portion 21 can be set on the side surface of the substrate 1111 away from the protruding edge 1112, and the clamping portion 22 can be set on the surface of the substrate 1111 and on the same side as the protruding edge 1112. The clamping portion 22 of the spring 20 can move relative to the bus 11 (or the substrate 1111). When the temperature sensing element is set between the clamping portion 22 and the bus 11 (or the substrate 1111), similarly, the clamping portion 22 of the spring 20 undergoes elastic deformation so that the clamping portion 22 and the bus 11 (or the substrate 1111) can clamp the temperature sensing element. In order to better fix the temperature sensing element, the spring 20 can be made of a material with a large elastic coefficient, and / or the width of the clamping portion 22 can be set to be not less than the radial dimension of the temperature sensing element, so that the temperature sensing element can be firmly abutted against the bus. An advantage of the embodiment of the present application is that the sleeve 12 is omitted and the fixing portion 21 of the spring piece 20 is directly connected to the bus 11 by welding, screwing or any other suitable connection method, so that the clamping portion 22 of the spring piece 20 can move closer to or away from the bus 11, and the temperature sensing element can be confined to the bus 11, which is beneficial to further simplify the connection of the detection element 30 and reduce auxiliary processes.

[0054] The present application also provides a battery pack, which includes the busbar assembly 1, the detection element 30, and a battery pack (not shown in the figure) provided in the embodiments of the present application. The battery pack includes a plurality of battery cells. The busbar assembly 1 is used to electrically connect two different battery cells in the battery pack. The busbar assembly 1 includes a main body portion 10 and a spring piece 20. The main body portion 10 is used to electrically connect two battery cells, and the spring piece 20 is disposed on the main body portion 10 and fixes the detection element 30. The main body portion 10 provided in the present application further includes a busbar 11. One side of the detection element 30 facing the busbar 11 is set as a plane and is in contact with the busbar 11, so that the connection between the detection element 30 and the busbar 11 is more reliable. It should be noted that the shape of the detection element 30 can also be set to other shapes according to needs, and the figure is only an example.

[0055] In some embodiments of the present application, the detection element 30 may include a sensing element and a wire harness (not shown in the figure). One end of the wire harness is connected to the sensing element. The battery pack may further include an insulating member (not shown in the figure) disposed between the battery pack and a plurality of busbars. To prevent the connection between the wire harness and the sensing element from loosening, appropriate fastening measures can be taken to fix the wire harness to the insulating member. For example, in some embodiments, through holes can be opened at appropriate positions on the insulating member. Exemplarily, first, two through holes penetrating the insulating member can be opened at one end of the projection formed by the wire harness on the surface of the insulating member and close to the sensing element. Then, a cable tie is passed through one through hole, and then, after bypassing the wire harness, it is passed through the other through hole. Finally, the wire harness can be fixed to the insulating member, which can prevent the sensing element connected thereto from loosening from the sleeve 12 due to the wire harness being pulled by force.

[0056] It can be understood that the battery pack provided in the embodiments of the present application can be a lithium battery pack or other types of battery packs, and the specific type of the battery pack is not limited in the embodiments of the present application.

[0057] In summary, compared with the busbar components and battery packs in the related art, the beneficial effects of the busbar components and battery packs provided by the embodiments of the present application are as follows: Firstly, the elastic piece is provided with a fixing part and a clamping part, and the fixing part is connected to the main body part, while the clamping part can move relative to the main body part. When a detection element is arranged between the clamping part and the main body part, the elastic piece can undergo elastic deformation to clamp the detection element. The elastic piece and the main body part can cooperate to fix the detection element, achieving the technical effects of simple and reliable connection and reduction of auxiliary processes. There is no need for gluing or waiting for the glue to cure, realizing fast connection and high assembly efficiency, thereby improving the technical problem of low process efficiency in the related art. Secondly, the sleeve and the busbar, as well as the elastic piece and the sleeve, are connected by welding, which can ensure better connection strength between the sleeve and the busbar, as well as between the elastic piece and the sleeve, and thus effectively reduce the situation of easy loosening of the sleeve, the elastic piece, and the detection element. Thirdly, by designing the main body part and the detection element to have mutually adaptable outer shapes so as to form a special-shaped fit between the main body part and the detection element, on the premise of ensuring a reliable connection between the main body part and the detection element, it is beneficial to increase the amount of physical information of the battery cell obtained by the detection element and can also play an anti-misassembly role to ensure the connection matching between the detection element and the main body part. Finally, by setting at least part of the two ends of the clamping part to protrude in the direction close to or away from the tube wall to form a bending angle, when the detection element extends into the limiting space, the temperature sensing element interferes with the bending angle, and the angle of the bending angle changes. Thus, the clamping part can generate an elastic force to abut the temperature sensing element against the tube wall, effectively preventing the detection element from loosening from the sleeve.

[0058] The embodiments of the present invention have been described in detail above. Specific examples are used herein to illustrate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A busbar assembly, characterized in that: The busbar assembly comprises: The main part; A spring sheet, the spring sheet comprising a fixing portion and a clamping portion connected to each other, the fixing portion being connected to the main body portion, and the clamping portion being movable relative to the main body portion; When a detection element is arranged between the clamping portion and the main body, the spring sheet is elastically deformed so that the clamping portion of the spring sheet and the main body clamp the detection element.

2. The busbar assembly according to claim 1, characterized in that: The main body part includes a bus and a sleeve, and the sleeve is installed on the bus; the fixing part of the spring sheet is connected to the sleeve; a limiting space is provided in the sleeve, and the clamping part of the spring sheet is provided in the limiting space to cooperate with the sleeve to limit the detection element located in the limiting space.

3. The busbar assembly according to claim 2, characterized in that: At least part of the clamping portion protrudes toward or away from the wall of the sleeve to form a bending angle. When the detection element extends into the limiting space, the angle of the bending angle changes so that the clamping portion elastically abuts against the detection element.

4. The busbar assembly according to claim 3, characterized in that: The clamping portion includes a free end away from the fixing portion, the clamping portion is partially bent in a direction away from the tube wall, and the clamping portion includes an abutting section away from the tube wall, the abutting section is used to abut the detection element, and the free end abuts the tube wall; or The clamping portion is bent in a direction close to the tube wall, and the clamping portion includes an abutting section abutting against the tube wall, and the free end is used for abutting against the detection element.

5. The busbar assembly according to claim 4, characterized in that: The fixing portion includes a first connecting edge and a second connecting edge connected to each other, the first connecting edge is arranged on a side of the tube wall away from the limiting space, and the second connecting edge is arranged on the other side of the tube wall facing the limiting space, the first connecting edge and the second connecting edge are arranged opposite to each other, one end of the second connecting edge is connected to the first connecting edge, and the other end of the second connecting edge is connected to the clamping portion.

6. The busbar assembly according to any one of claims 3 to 5, characterized in that: The tube wall includes a first surrounding wall and a second surrounding wall; wherein, the first surrounding wall is arc-shaped, the second surrounding wall is plate-shaped, and the first surrounding wall and the second surrounding wall are connected to form the limiting space; the spring sheet is arranged on the first surrounding wall, and the second surrounding wall is attached to the bus.

7. The busbar assembly according to any one of claims 2 to 5, characterized in that: The spring piece and the sleeve are integrally arranged.

8. The busbar assembly according to claim 1, characterized in that: The main body portion includes a bus; the fixing portion of the spring sheet is arranged on the bus, and the clamping portion can move relative to the bus; when the detection element is arranged between the clamping portion and the bus, the clamping portion of the spring sheet elastically deforms so that the clamping portion and the bus clamp the detection element.

9. A battery pack, characterized in that: include: Detection element; A battery pack, comprising a plurality of cells; A busbar assembly, wherein the busbar assembly is a busbar assembly as described in any one of claims 1-8; wherein the main body of the busbar assembly is used to electrically connect the two battery cells, and the spring clip of the busbar assembly fixes the detection element.

10. The battery pack according to claim 9, characterized in that: The side of the detection element facing the busbar of the main body is a plane and is in contact with the busbar.

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