Power busbar and battery
Patent Information
- Application Number
- DE202024107127U0
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Priority Date
- 2024-07-03
- Filing Date
- 2024-12-09
- Publication Date
- 2025-01-30
- Estimated Expiration
- 2034-12-31
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
FIELD OF THE INVENTIONThe present application relates to the technical field of power bus bars, specifically, to a power bus bar and a battery.PRIOR ARTAs compared with conventional batteries such as nickel-cadmium and lead-acid batteries, lithium-ion batteries have advantages of high energy density, high working voltage, low self-discharge rate, long life, high charge-discharge efficiency, wide operating temperature range and low environmental pollution. At present, lithium ion batteries are widely used in mobile phones, notebooks, and other 3C devices, as well as new power vehicles, and also have broad application prospects in civil aircraft, drones, space probes, and other areas of aerospace.DISCLOSURE OF THE INVENTIONAt present, the bus bar of the lithium battery is normally welded with a tab, but the bus bar of the related technology has only a central pressure relief hole, which has problems of low pressure relief efficiency and low liquid filling efficiency.The present application provides a busbar comprising:a busbar main body comprising a first current collecting region and a second current collecting region, the second current collecting region being arranged at least around a part of the first current collecting region; the busbar main body further having a plurality of pressure relief grooves arranged spaced apart in the circumferential direction in the first current collecting region, the pressure relief groove comprising a first grooved pipe, a second grooved pipe and a grooved body, two ends of the grooved body being connected to the first grooved pipe and the second grooved pipe, respectively, the grooved body being arc-shaped, and the center of circle of the arc at which the grooved body is located is on a side of the grooved body facing the second current collecting region.The present application further provides a battery. It comprises:a circuit breaker;a cell;a busbar described above connected to the circuit breaker and the battery cell.Advantageous Effects:The bus bar according to the application includes a bus bar main body and a conductive portion. Here, the bus bar main body includes a first current collecting portion and a second current collecting portion, the second current collecting portion being disposed around at least a part of the first current collecting portion. The busbar main body further includes a plurality of pressure relief grooves spaced apart in the circumferential direction in the first current collecting region, the pressure relief groove including a first grooved pipe, a second grooved pipe, and a grooved body, two ends of the grooved body being connected to the first grooved pipe and the second grooved pipe, respectively, and the grooved body being arc-shaped. The pressure relief groove has a function of releasing pressure and also has a function of filling electrolyte, and the pressure relief groove is provided in a plurality, which also increases the area of releasing pressure and liquid filling and improves the efficiency of releasing pressure and liquid filling.SUMMARY OF THE INVENTIONFIG. 1 is a schematic structural view of a busbar according to a preferred embodiment of the present application; FIG. 2 is another schematic structural view of a busbar according to a preferred embodiment of the present application; FIG. 3 is another schematic structural view of a busbar according to a preferred embodiment of the present application; FIGS. 4A, 4B, and 4C each show a schematic illustration of a pressure relief groove according to an embodiment of the present application; FIG. 5 is a schematic illustration of a weld path according to an embodiment of the present application; FIG. 6 is a sectional view of a bus bar according to an embodiment of the present application.Description of the Reference Numerals:Reference numeral: 100 - busbar main body; 10 - first current collecting portion; 101 - pressure relief groove; 1011 - first grooved pipe; 1011a - first side wall; 1011b - second side wall; 1012 - second grooved pipe; 1012a - third side wall; 1012b - fourth side wall; 1013 - grooved body; 1013a - first curved side wall; 1013b - second curved side wall; 1014 - first space; 1015 - second space; 102 - first connecting portion; 103 - second connecting portion; 104 - central pressure relief hole; 20 - second current collecting portion; 200 - conductive portion; 300 - welding path.Embodiments of the InventionIt is understood in the specification of the application that the terms "upper", "lower", etc. are used with reference to the illustrated directional or positional relationship in the respective figure, respectively, to describe only the application and simplify the description as appropriate. In other words, these terms neither suggest explicitly the positioning nor the configuration and operation of the relevant device or the relevant element in a predetermined positioning, so that here too there is no restriction of the application. Furthermore, it should be noted that the terms "first" and "second" should not be understood as an explicit or in-depth indication of the relative importance or of the number of features involved. Instead, these are used merely for description. Thus, a feature more accurately determined as "first" or "second" may explicitly or implicitly indicate that one or more such features are included. In the specification of the present application, the term "plural" refers to a number of two or more unless defined otherwise.In various embodiments of the application, repeated reference numerals in the form of numbers and / or letters could be used for simplicity and clarity without indicating any relationships between the individual embodiments and / or arrangements discussed herein.In the following, the busbar and the battery according to the present application are discussed in more detail with reference to specific embodiments and the accompanying drawings. The busbar can be used, for example, as a positive busbar of the battery.Referring to FIGS. 1 to 4A, the present application provides a bus bar including:a bus bar main body 100 comprising a first power collecting portion 10 and a second power collecting portion 20, the second power collecting portion 20 being disposed around at least a part of the first power collecting portion 10; the bus bar main body 100 further having a plurality of pressure relief grooves 101 spaced apart in the circumferential direction in the first power collecting portion 10, the pressure relief groove 101 comprising a first nut tube 1011, a second nut tube 1012, and a groove body 1013, two ends of the groove body 1013 being connected to the first nut tube 1011 and the second nut tube 1012, respectively, the groove body 1013 being arc-shaped, and the center of the circle of the arc on which the groove body 1013 is located is on a side of the groove body 1013 facing the second power collecting portion 20.Specifically, the groove body 1013 is bent toward a side facing the second current collecting portion 20, both ends of the groove body 1013 are connected to the first grooved pipe 1011 and the second grooved pipe 1012, respectively, the first grooved pipe 1011 and the second grooved pipe 1012 extend toward a side facing the second current collecting portion 20. The orthogonal projection of the pressure relief groove 101 is projected onto the cell, and the electrolyte may be filled into the cell from the first nut tube 1011, the second nut tube 1012, and the groove body 1013 to ensure that the electrolyte may be filled at different locations of the cell. Moreover, the groove body 1013 has a smooth arc shape, and the filled electrolyte can flow into the first groove tube 1011 and the second groove tube 1012 along the arc shape of the groove body 1013 and be filled into the cell, so that the uniformity of liquid filling is improved, thus the electrolyte can get to various positions of the cell and the filling efficiency of the electrolyte is improved.When the electrolyte is filled, the electrolyte spreads around the bus bar, and a plurality of pressure relief grooves 101 are spaced apart in the circumferential direction in the first current collecting portion 10, and the electrolyte can flow into the first grooved pipe 1011 and the second grooved pipe 1012 along the arc-shaped groove body 1013, so that the filling efficiency and the uniformity of filling the electrolyte are further improved. For example, referring to FIG. 1, the first current collecting region 10 has a connection surface A along a second direction X perpendicular to the first direction Y, the orthogonal projection of the connection surface A onto the second direction X is rectangular, for example, and the conductive portion 200 extends perpendicular to the connection surface A along the second direction X. Specifically, the second current collecting region 20 surrounds the first current collecting region 10 except for the connection surface A.Referring to FIGS. 1 to 3, the number of the pressure relief grooves 101 in this embodiment is, for example, 3, but not limited thereto, and is adaptively increased according to the area of the bus bar main body 100 to increase the filling efficiency or pressure relief efficiency of the electrolyte. The first flow collecting portion 10 is provided with a central pressure relief hole 104, and the straight line distance from the center of the central pressure relief hole 104 to the joint surface A is smaller than the distance from the center of the circle of the central pressure relief hole 104 to the outer periphery of the first flow collecting portion 10, and based on the comparison of this distance, no pressure relief groove 101 is disposed not on a side of the first flow collecting portion 10 facing the joint surface A.Referring to FIGS. 4A-6, in an optional embodiment of the present application, an end of the first grooved pipe 1011 and the second grooved pipe 1012 facing away from the groove body 1013 extends to a side of the second current collecting region 20 facing the first current collecting region 10.It can be understood that an end of the first grooved tube 1011 and of the second grooved tube 1012 facing away from the central pressure relief bore 104 lies against a side of the second grooved region 20 facing the first current collecting region 10. The pressure relief groove 101 is located in the first bus bar portion 10 and extends to a side of the second groove portion 20 opposite to the first bus bar portion 10, thereby securing the strength of the bus bar structure and not making the bus bar susceptible to deformation.For example, it is conceivable that an end of the first grooved pipe 1011 and of the second grooved pipe 1012 facing away from the groove body 1013 does not extend as far as the side of the second flow collecting region 20 facing the first flow collecting region 10, i.e. the end of the first grooved pipe 1011 and of the second grooved pipe 1012 facing away from the central pressure relief bore 104 has a certain distance from the second branching region 20, and the distance is based on the criterion that it does not influence the surface of the first connecting region 102, of the second connecting region 103 and of the central pressure relief bore 104, and the specific application is to take priority. In an optional embodiment of the present application, the first current collecting portion 10 is provided with a first connecting portion 102 spaced apart in the circumferential direction for connecting to a tab of a cell, and the first connecting portion 102 is disposed between the first nut tube 1011 and the second nut tube 1012.Referring to FIGS. 2 to 5, the first joint portion 102 is a welding portion, a welding path 300 is formed in the first joint portion 102, the first joint portion 102 is welded to the tab of the cell, and the welding portion may be laser welded, for example, but not limited to.In an optional embodiment of the present application, two opposite sides of the first connection region 102 facing the pressure relief groove 101 have a first spacing 1014.Specifically, the first connecting portion 102 is located between the first duct tube 1011 and the second duct tube 1012 and on the side of the groove body 1013 bent toward the second drawing-in portion 20.As can be understood, the first connecting region 102 is not connected to the side of the groove body 1013 facing the second current collecting region 20, and the two have the first spacing 1014.More specifically, the first clearance 1014 is present between the end of the first connection portion 102 remote from the second current collecting portion 20 and the first nut tube 1011, the second nut tube 1012, or the nut body 1013, and the first clearance 1014 is used to avoid the connection between the first connection portion 102 and the pressure relief groove 101, thereby impairing the continuity and integrity of the weld path 300. An end of the first connection portion 102 facing away from the second current collecting portion 20 includes a first end and a second end, the first end has the first distance 1014 from the first grooved tube 1011 or the grooved body 1013, the second end also has the first distance 1014 from the second grooved tube 1012 or the grooved body 1013, and the amount of the first distance 1014 is put to practical use, and the first connection portion 102 is not required to have contact with the pressure relief groove 101. Moreover, the weld path 300 formed in the first connection portion 102 is a continuous weld path 300, and the continuity of the weld path 300 is not affected by the formation of the pressure relief groove 101.In an optional embodiment of the present application, the first current collecting portion 10 is provided with a second connecting portion 103 spaced in the circumferential direction for connecting to the tab of the cell, and the second connecting portion 103 is disposed between two adjacent pressure relief grooves 101, the area of the first connecting portion 102 being smaller than the area of the second connecting portion 103.Specifically, the provision of the first connection portion 102 and the second connection portion 103 increases the welding area and ensures the stability of the welding. Since the area of the first connecting portion 102 is smaller than the area of the second connecting portion 103, the length of the weld path 300 formed in the first connecting portion 102 is, for example, smaller than the length of the weld path 300 formed by the second connecting portion 103.For example, the end of the first connection portion 102 facing the second current collecting portion 20 is at a first distance from the second current collecting portion, and the end of the second connection portion 103 facing the second current collecting portion 20 is also at a second distance from the second current collecting portion, and the first distance is equal to the second distance. Since the length of the welding path 300 formed by the first connection region 102 is smaller than the length of the welding path 300 formed by the second connection region 103, the end of the second connection region 103 facing away from the second current collecting region 20 is closer to the center of the first connection region 10, and the welding path 300 formed in the second connection region 103 is also a continuous and uninterrupted welding path 300.Specifically, the center of the central pressure relief hole 104 is taken as a reference, for example, the diameter of the central pressure relief hole 104 to the end of the second connection portion 103 facing away from the second flow collecting portion 20 is 8 mm to 8.6 mm, but is not limited thereto, and the diameter of the circle center of the central pressure relief hole 104 to the end of the first connection portion 102 facing away from the second flow collecting portion 20 is greater than 8 mm to 8.6 mm, and the specific application is intended to prevail. The first connecting portion 102 and the second connecting portion 103 are spaced apart such that the first connecting portion 102 and the second connecting portion 103 have a sufficient welding area for welding to the tab of the cell and the welding is more stable.In an optional embodiment of the present application, two opposite sides of the second connection portion 103 facing the pressure relief groove 101 are spaced apart by a second distance 1015.Specifically, the second connection portion 103 is a welding portion located between two adjacent pressure relief grooves 101, a second clearance 1015 is provided between an end of the second connection portion 103 facing away from the second current collecting portion 20 and two adjacent pressure relief grooves 101, the length of the second clearance 1015 is put into practical use, and the second connection portion 103 is not required to have contact with the pressure relief groove 101. Moreover, the weld path 300 formed in the second connection portion 103 is a continuous weld path 300, and the continuity of the weld path 300 is not affected by the formation of the pressure relief groove 101.In an optional embodiment of the present application, the first grooved tube 1011 and the second grooved tube 1012 each have a first side wall and a second side wall which are opposed and parallel to each other. The distance between the first side wall and the second side wall is 0.6 mm to 1.1 mm, and the length of the first side wall and the second side wall is 2.6 mm to 3.9 mm.Specifically, the first grooved pipe 1011 includes a first side wall 1011 aand a second side wall 1011 bwhich are parallel to each other, and the first side wall 1011 aand the second side wall 1011 bare equal in length; the second grooved pipe 1012 includes a third side wall 1012 aand a fourth side wall 1012 bwhich are parallel to each other, and the third side wall 1012 aand the fourth side wall 1012 bare equal in length.In an optional embodiment of the present application, the groove body 1013 includes a first curved side wall 1013 aand a second curved side wall 1013 bdisposed opposite to each other, the diameter of the first curved side wall 1013 ais 3.3 mm to 4.8 mm, the diameter of the second curved side wall 1013 bis 1.5 mm to 2.5 mm, the both ends of the first side wall 1013 aare connected to the first side wall 1011 aof the first grooved pipe 1011 and the third side wall 1012 aof the second grooved pipe 1012, respectively. The both ends of the second curved side wall 1013 bare respectively connected to the second side wall 1011 bof the first grooved pipe 1011 and the fourth side wall 1012 bof the second grooved pipe 1012, and the arc lengths of the first curved side wall 1013 aand the second curved side wall 1013 bare adaptively changed according to the actual situation.Specifically, in order to satisfy the spatial requirements of the welding path 300, the positional relationship between the first connection portion 102, the second connection portion 103, and the pressure relief groove 101 needs to be limited. In an embodiment, the distance between the first side wall 1011 aand the second side wall 1011 bis 0.6 mm to 1.1 mm, and the distance between the third side wall 1012 aand the fourth side wall 1012 bis 0.6 mm to 1.1 mm, i.e., the width of the first grooved tube 1011 and the second grooved tube 1012 is 0.6 mm to 1.1 mm. For the sake of description, the first side wall 1011 aand the third side wall 1012 aare collectively referred to as the first side wall, and the second side wall 1011 band the fourth side wall 1012 bare collectively referred to as the second side wall. The length of the first side wall and the second side wall is 2.6 mm, the diameter of the first curved side wall 1013 ais 3.8 mm to 4.8 mm, the diameter of the second curved side wall 1013 bis 2.5 mm, the first distance is 0.5 mm, the second distance is equal to or larger than 0.5 mm, the first distance and the second distance are used to ensure that the first connection portion 102 and the second connection portion 103 do not contact the pressure relief groove 101 and thus affect the welding path 300.It is understood that, in this embodiment, when the length of the first side wall and the second side wall has a fixed value of 2.6 mm, the distance between the first side wall and the second side wall is not more than 1.1 mm, and when it is more than 1.1 mm, it causes the pressure relief groove 101 to contact the first connecting portion 102 and the second connecting portion 103, thereby affecting the welding sheet 300.In another embodiment, when the distance between the first sidewall and the second sidewall is 0.6 mm, the sum of the areas of the plurality of pressure relief grooves 101 and the central pressure relief bore 104 is 26.6 mm 2. When the distance between the first side wall and the second side wall is 1.1 mm, the sum of the areas of the plurality of pressure relief grooves 101 and the central pressure relief bore 104 is 41.4 mm 2. That is, when the distance between the first side wall and the second side wall is 0.6 mm to 1.1 mm, the condition that the sum of the total pressure release area of the plurality of pressure release grooves 101 and the central pressure release bore 104 is not less than 26.6 mm 2 can be satisfied.Referring to FIG. 4C, in another embodiment, the shape of the pressure relief groove 101 may also be changed, but the inclination angle of the changed pressure relief groove 101 matches the inclination angles of the first grooved pipe 1011 and the second grooved pipe 1012 in FIGS. 4A and 4B to ensure that the pressure relief groove 101 does not contact the first connection portion 102 and the second connection portion 103 and affect the welding path 300. In this embodiment, the length of the first side wall and the second side wall may be 3.9 mm, the distance between the first side wall and the second side wall may be 0.88 mm, the diameter of the first curved side wall 1013 amay be 3.3 mm, the diameter of the second curved side wall 1013 bmay be 1.5 mm, and the sum of the total pressure release area of the plurality of pressure release grooves 101 and the central pressure release bore 104 is not less than 26.6 mm 2.In an optional embodiment of the present application, the first current collecting portion 10 is provided with a central pressure relief hole 104 along the first direction Y, and the central pressure relief hole 104 also has the functions of pressure relief and electrolyte filling.In an optional embodiment of the present application, the vertical distance between the center of the circle of the central pressure relief bore 104 and the second connection portion 103 is a first length, the vertical distance between the center of the circle of the central pressure relief bore 104 and the groove body 1013 is a second length, and the first length is smaller than the second length.Specifically, the electrolyte falls into the bus bar, and a part of the electrolyte is filled into the cell along the central pressure relief hole 104, and the other part flows into the pressure relief groove 101 circumferentially disposed along the bus bar. The pressure relief groove 101 includes an arc-shaped groove body 1013, and the electrolyte flows into the first grooved pipe 1011 and the second grooved pipe 1012 along the groove body 1013 and flows into the cell, and the cell is filled uniformly, thus improving the electrolyte filling or pressure relief efficiency.For example, when the first current collecting portion 10 is a complete circle, the central position of the first current collecting portion 10 is determined, the central pressure relief hole 104 is located at the center of the first current collecting portion 10. The distance between the center of the circle of the central pressure relief bore 104 and the end of the second connecting region 103 facing away from the second current collecting region 20 is, for example, 8 mm to 8.6 mm, but is not limited thereto. The diameter distance between the center of the circle of the pressure relief bore 104 and the end of the first connection region 102 facing away from the second current collecting region 20 is greater than 8 mm to 8.6 mm, and the specific application is intended to prevail.In an optional embodiment of the present application, the part of the first current collecting region 10 not surrounded by the second current collecting region 20 is provided with a conductive portion 200 connected to the first current collecting region 10.Specifically, the first current collecting region 10 has a connection surface A along the second direction X perpendicular to the first direction Y, and the conductive portion 200 is perpendicularly connected to the connection surface A along the second direction X, and the connection surface A is not surrounded by the second current collecting region 20.In an optional embodiment of the present application, the side of the conductive portion 200 opposite from the busbar main body 100 is formed in an arc shape, but is not limited thereto, to avoid obscuring a vent hole of a cap.In the second aspect, another optional embodiment of the present application provides a battery comprising: a circuit breaker; a cell; a busbar described above connected to the circuit breaker and the battery cell.Specifically, the bus bar is used as, for example, a positive bus bar. The cell includes the necessary parts of the cell such as a plus tab, a minus tab, a plus electrode sheet, a minus electrode sheet, a separator sheet, and electrolytes, etc., the bus bar side having the first connection portion 102 and the second connection portion 103 is laser welded to the plus tab, the welding position is, for example, the first connection portion 102 and the second connection portion 103, and an end of the conductive portion 200 facing away from the bus bar main body 100 is connected to the circuit breaker.Specifically, the circuit breaker has a gas discharge hole. For example, the area of a plurality of pressure relief grooves 101 plus the central pressure relief bore is, for example, 32.13 mm 2, and the area of the gas discharge hole is, for example, 26.61 mm 2. That is, 32.13 mm 2 >26.61 mm 2, the area of the plurality of pressure relief grooves 101 plus the central pressure relief hole is larger than the area of the gas discharge hole, and the pressure relief efficiency and the liquid filling efficiency are improved.The bus bar according to the application includes at least the following operation or principle: a bus bar main body and a conductive portion. Here, the bus bar main body includes a first current collecting portion and a second current collecting portion, the second current collecting portion being disposed around at least a part of the first current collecting portion. The busbar main body further includes a plurality of pressure relief grooves spaced apart in the circumferential direction in the first current collecting region, the pressure relief groove including a first grooved pipe, a second grooved pipe, and a grooved body, two ends of the grooved body being connected to the first grooved pipe and the second grooved pipe, respectively, and the grooved body being arc-shaped. The pressure relief groove has a function of releasing pressure and also has a function of filling electrolyte, and the pressure relief groove is provided in a plurality, which also increases the area of releasing pressure and liquid filling and improves the efficiency of releasing pressure and liquid filling.
Claims
A busbar comprising: a busbar main body (100) comprising a first current collecting portion (10) and a second current collecting portion (20), the second current collecting portion (20) being disposed around at least a part of the first current collecting portion (10); wherein the busbar main body (100) further has a plurality of pressure relief grooves (101) spaced apart in the circumferential direction in the first current collecting region (10), the pressure relief groove (101) comprising a first grooved pipe (1011), a second grooved pipe (1012), and a groove body (1013), wherein two ends of the groove body (1013) are connected to the first grooved pipe (1011) and the second grooved pipe (1012), respectively, the groove body (1013) is arc-shaped, and a center of a circle of an arc at which the groove body (1013) is located is on a side of the groove body (1013) facing the second current collecting region (20).The busbar according to claim 1, wherein an end of the first slot tube (1011) and of the second slot tube (1012) facing away from the slot body (1013) extends to a side of the second current collecting region (20) facing the first current collecting region (10).The busbar according to claim 2, wherein the first busbar portion (10) is provided with a first connection portion (102) spaced apart in the circumferential direction for connection to a tab of a cell, and the first connection portion (102) is disposed between the first slot tube (1011) and the second slot tube (1012).The busbar according to claim 3, wherein two opposite sides of the first connection region (102) facing the pressure relief groove (101) are at a first distance (1014).The busbar according to claim 3 or 4, wherein the first current collecting portion (10) is provided with a second connecting portion (103) spaced in the circumferential direction for connecting to the tab of the cell, and the second connecting portion (103) is disposed between two adjacent pressure relief grooves (101), an area of the first connecting portion (102) being smaller than an area of the second connecting portion (103).The busbar according to claim 5, wherein two opposing sides of the second connection region (103) facing two adjacent pressure relief grooves (101) are at a second distance (1015).The busbar of any one of claims 1 to 6, wherein the first grooved pipe (1011) has a first side wall (1011a) and a second side wall (1011b) that are parallel to each other, a distance between the first side wall (1011a) and the second side wall (1011b) is 0.6 mm to 1.1 mm, and the length of the first side wall (1011a) and the second side wall (1011b) is 2.6 mm to 3.9 mm; wherein the second grooved pipe (1012) has a third side wall (1012A) and a fourth side wall (1012B) which are parallel to each other, a distance between the third side wall (1012A) and the fourth side wall (1012B) is 0.6 mm to 1.1 mm, and a length of the third side wall (1012A) and the fourth side wall (1012B) is 2.6 mm to 3.9 mm.The bus bar according to claim 7, wherein the slot body (1013) comprises a first curved side wall (1013a) and a second curved side wall (1013b) arranged opposite to each other, wherein a diameter of the first curved side wall (1013a) is 3.3 mm to 4.8 mm, a diameter of the second curved side wall (1013b) is 1.5 mm to 2.5 mm, wherein both ends of the first curved side wall (1013a) are connected to the first side wall (1011a) of the first slot tube (1011) and the third side wall (1012a) of the second slot tube (1012), respectively, and both ends of the second curved side wall (1013b) are connected to the second side wall (1011b) of the first slot tube (1011) and the fourth side wall (1012b) of the second slot tube (1012), respectively.The busbar according to any one of claims 5 to 8, wherein the first current collecting region (10) is provided with a central pressure relief bore (104) along a first direction, and the central pressure relief bore (104) is arranged in the middle of the second current collecting region (20) and is located on a side of the pressure relief groove (101) facing away from the second current collecting region (20).The busbar of claim 9, wherein a vertical distance between the center of the circle of the central pressure relief bore (104) and the second connection region (103) is a first length, a vertical distance between the center of the circle of the central pressure relief bore (104) and the slot body (1013) is a second length, and the first length is less than the second length.The busbar according to any one of claims 1 to 10, wherein the part of the first current collecting region (10) not surrounded by the second current collecting region (20) is provided with a conductive portion (200) connected to the first current collecting region (10).The busbar according to claim 11, wherein a side of the conductive portion (200) facing away from the busbar main body (100) is formed in an arc shape.A battery comprising: a circuit breaker; a cell; a busbar according to any one of claims 1 to 12 connected to the circuit breaker and the battery cell.