Electrical connecting sheet and relay

Abstract

The utility model relates to an electrical connecting piece and a relay, and belongs to the technical field of electrical connection.The electrical connecting piece and the relay comprise a connecting piece body, the connecting piece body is composed of a welding end and a welding plate, the connecting piece body is in an L shape which is turned over by 90 degrees clockwise, flanges are arranged on the two sides of the welding end, and the welding plate is arranged on the welding end. One end of the flange abuts against the welding plate, the other end of the flange can be supported on the circuit board and connected with the circuit board, and the welding end and the flange are provided with a first welding foot, a second welding foot and a third welding foot respectively. The welding plate can be pressed down through gravity, stress is transmitted to the welding end and the turned-over edge and then transmitted to the circuit board, the turned-over edge is used for assisting in supporting stress, and the situation that the circuit structure and the product are damaged due to the fact that the welding plate is pressed down after being welded and the welding end is bent due to complete stress of the welding end is avoided.

Description

Technical Field

[0001] The present application relates to the field of electrical connection technology, and in particular to an electrical connection sheet and a relay. Background Art

[0002] BDU, or battery pack disconnect unit, is an important component of new energy vehicles. It provides charge and discharge control, circuit overload protection, etc. for the high-voltage system of new energy vehicles. In order to achieve high-voltage sampling and low-voltage control of BDU, the internal part of BDU usually adopts wiring harness connection, PCB board connection or FPC connection to make electrical connection of high and low voltage signals.

[0003] BDU, also known as high-voltage distribution box, is integrated in the battery pack and includes components such as relays, main fuses or MSDs, pre-charge resistors, current sensors, etc. It uses a plastic shell as a structural support, copper busbars as a medium for carrying large currents, and cables or PCBs as medium for carrying small currents and communication control signals. For traditional BDU or intelligent BDU, electrical connections are mainly based on wiring harnesses. In the prior art, the BDU main control circuit board and relay are connected by wiring harnesses, which results in reduced production efficiency of the control board.

[0004] In response to this problem, a connecting piece has been introduced to replace the wiring harness. However, the existing connecting piece has no supporting structure, resulting in poor strength and prone to distortion. Summary of the invention

[0005] The embodiments of the present application provide an electrical connecting piece and a relay to solve the problem in the prior art that the existing connecting piece has no supporting structure, resulting in poor tolerable strength and easy distortion and deformation.

[0006] A first aspect of an embodiment of the present application provides an electrical connecting sheet, comprising:

[0007] A connecting piece body, the connecting piece body is composed of a welding end and a welding plate, and the connecting piece body is an L-shape turned 90° clockwise;

[0008] The welding end is provided with flanges on both sides, one end of the flange abuts against the welding plate, and the other end can be supported on the circuit board and connected to the circuit board;

[0009] The welding end and the flange are respectively provided with a first welding foot, a second welding foot and a third welding foot.

[0010] In some embodiments, the flange includes a first flange and a second flange;

[0011] The first welding leg is arranged at an end of the first flange away from the welding plate, and the second welding leg is arranged at an end of the second flange away from the welding plate;

[0012] The third welding leg is arranged at an end of the welding end away from the welding plate;

[0013] The first solder leg and the second solder leg are both spaced apart from the third solder leg and form a notch with an opening facing the circuit board.

[0014] In some embodiments, a limit block is provided in the notch, and the limit block is connected to the flange.

[0015] In some embodiments, local protrusions are provided on both side walls of the welding end to form reinforcing ribs, and a groove is formed correspondingly on the side opposite to the reinforcing ribs.

[0016] In some embodiments, the flange includes a first flange and a second flange;

[0017] The third welding leg is arranged at an end of the welding end away from the welding plate;

[0018] The connection between the first flange and the welding end extends toward the circuit board to form a first welding foot, and the cross section of the first welding foot is L-shaped;

[0019] A connection between the second flange and the welding end extends toward the circuit board to form a second welding foot, and a cross section of the second welding foot is L-shaped.

[0020] In some embodiments, the welding plate is provided with a positioning hole for positioning the welding position of the workpiece and a welding reference hole for positioning the welding position of the connecting piece body.

[0021] In some embodiments, the welding plate is an L-shaped plate body composed of a narrow plate and a wide plate.

[0022] In some embodiments, the wide plate of the welding plate is the welding surface.

[0023] In some embodiments, third flanges facing the circuit board are provided on both sides of the narrow plate of the welding plate.

[0024] A second aspect of an embodiment of the present application provides a relay, wherein the relay is provided with an electrical positioning column connected to a positioning hole.

[0025] The beneficial effects of the technical solution provided by this application include:

[0026] When the connecting piece body is assembled on the circuit board, the welding end is supported on the circuit board, and the welding end and the circuit board are perpendicular to each other. The welding plate is arranged above the circuit board and connected to the welding end. The welding plate is suspended. When the relay needs to be welded on the welding plate, the suspended welding plate allows the relay to slightly change its angle up and down during welding to adapt to the actual installation position of the relay, making it more suitable during welding. The suspended setting can also allow the welding plate to have enough buffer space to resist stress, avoiding the situation where there is no buffer when there is stress after the completely fixed welding plate is welded to the relay, so that the stress acts directly on the connecting piece and the relay.

[0027] The welding plate is pressed down by gravity, and the force is transmitted to the welding end and the flange, and then to the circuit board. The flange is used to provide auxiliary support for the force to prevent the welding end from being fully stressed. As a result, when the welding plate is pressed down after welding, the welding end will also bend, thereby destroying the circuit structure and damaging the product. At the same time, the flange can limit the welding position height of the first welding leg, the second welding leg and the third welding leg.

[0028] By replacing the existing wiring harness with the welding end and the welding plate, the BDU main control circuit board can be directly welded and fixed during production, avoiding the complex structure of the wiring harness, which leads to unnecessary stress and easy confusion of the internal structure. The production also requires wiring and the volume required for production will also increase relatively, reducing production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of a first three-dimensional structure provided in an embodiment of the present application;

[0031] Figure 2 A second stereoscopic schematic diagram provided for an embodiment of the present application;

[0032] Figure 3 A third stereoscopic schematic diagram provided for an embodiment of the present application;

[0033] Figure 4 A fourth stereoscopic schematic diagram provided for an embodiment of the present application;

[0034] Figure 5 A schematic diagram of the general assembly provided for an embodiment of the present application;

[0035] Figure 6A schematic diagram of the connection between the electrical positioning column and the welding plate provided in the embodiment of the present application;

[0036] 1. Welding end; 11. Flanging; 111. First flange; 112. Second flange; 12. First welding leg; 13. Second welding leg; 14. Third welding leg; 15. Notch; 151. Limit block; 16. Reinforcement rib; 17. Groove; 2. Welding plate; 21. Positioning hole; 22. Welding reference hole; 23. Welding surface; 24. Third flange; 3. Relay; 31. Electrical positioning column. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] The embodiments of the present application provide an electrical connecting piece and a relay, which can solve the problem that the existing connecting piece has no supporting structure, resulting in poor tolerable strength and easy distortion and deformation.

[0039] See also Figure 1-6 As shown, the first aspect of the embodiment of the present application provides an electrical connecting sheet, comprising:

[0040] The connecting piece body is composed of a welding end 1 and a welding plate 2. The connecting piece body is an L-shape turned 90° clockwise.

[0041] The welding end 1 and the welding plate 2 form an L-shaped connecting piece body that is flipped 90° clockwise. In this embodiment and other embodiments, the use of the connecting piece in the BDU main control circuit board is used as an example. When the connecting piece body is assembled on the circuit board, the welding end 1 is welded and supported on the circuit board, and the welding end 1 and the circuit board are perpendicular to each other. The welding plate 2 is arranged above the circuit board in the air and connected to the welding end 1. The welding plate 2 is suspended. When the relay 3 needs to be welded on the welding plate 2, the suspended welding plate 2 allows the relay 3 to slightly change its angle up and down during welding to adapt to the actual installation position of the relay 3, making it more suitable during welding. The suspended setting can also allow the welding plate 2 to have enough buffer space to counteract stress, thereby avoiding the situation where there is no buffer when stress occurs after the completely fixed welding plate 2 is welded to the relay 3, causing the stress to act directly on the connecting piece and the relay 3.

[0042] The welding end 1 is provided with flanges 11 on both sides. One end of the flange 11 is in contact with the welding plate 2, and the other end can be supported on the circuit board and connected to the circuit board. When the connecting piece body is welded on the circuit board, the flange 11 is perpendicular to the welding plate 2 and the circuit board. The flange 11 is used to strengthen the supporting force of the welding end 1 on the welding plate 2. When the relay 3 is welded on the welding plate 2, the welding plate 2 is pressed down by gravity. At this time, the welding end 1 and the flange 11 are both subjected to force, and the force is supported by the flange 11 and the welding end 1 to avoid the welding end 1 being subjected to force alone, resulting in the welding plate 2 being pressed down after welding, so that the welding end 1 will also bend, thereby destroying the circuit structure and damaging the product.

[0043] By replacing the existing wiring harness with the welding end 1 and the welding plate 2, the BDU main control circuit board can be directly welded and fixed during production, avoiding the complex structure of the wiring harness, which leads to unnecessary stress and easy confusion of the internal structure. The production also requires wiring and the volume required for production will also increase relatively, reducing production efficiency.

[0044] Among them, the welding end 1 and the flange 11 are respectively provided with a first welding leg 12, a second welding leg 13 and a third welding leg 14. The welding end 1 and the flange 11 are welded and fixed on the circuit board through the first welding leg 12, the second welding leg 13 and the third welding leg 14, so that the connecting piece body can be fixed and electrically connected to the circuit board.

[0045] In some optional embodiments, see Figure 1-3 and Figure 5 As shown, in the electrical connecting sheet, the flange 11 includes a first flange 111 and a second flange 112, the first welding leg 12 is arranged at an end of the first flange 111 away from the welding plate 2, the second welding leg 13 is arranged at an end of the second flange 112 away from the welding plate 2, and the third welding leg 14 is arranged at an end of the welding end 1 away from the welding plate 2. The first welding leg 12 and the second welding leg 13 are both spaced apart from the third welding leg 14, and form a notch 15 opening toward the circuit board.

[0046] When the welding end 1 needs to be inserted into the circuit board for welding, the first welding leg 12, the second welding leg 13 and the third welding leg 14 are all inserted into the welding hole of the circuit board, and then welding is performed to fix the connecting piece body on the circuit board. Because the first welding leg 12 and the second welding leg 13 are respectively located on the first flange 111 and the second flange 112, the first flange 111, the second flange 112 and the welding end 1 are distributed in a herringbone shape, the first welding leg 12, the second welding leg 13 and the third welding leg 14 are also distributed in a herringbone shape.

[0047] When the first solder leg 12, the second solder leg 13 and the third solder leg 14 are inserted into the circuit board, the notch 15 is provided to avoid the need to open an overly large solder hole on the circuit board, so that the soldering point of the soldering end 1 has no support limit during soldering, resulting in inconvenience in soldering, and to avoid the soldering end 1 having to rely on soldering to limit the soldering end on the circuit board. When subjected to force, the force transmission is completely applied to itself. The notch 15 can be used to separate and independently set the soldering holes corresponding to the first solder leg 12, the second solder leg 13 and the third solder leg 14, so that after the first solder leg 12, the second solder leg 13 and the third solder leg 14 are inserted into the circuit board, the soldering end 1 and the flange 11 can be stuck on the circuit board through the notch 15 On the top, the insertion depth of the first welding leg 12, the second welding leg 13 and the third welding leg 14 is limited, and the welding end 1 is initially supported and positioned before welding. When the welding plate 2 is subjected to force, the force is transmitted to the flange 11 and the welding end 1, and part of the force is also transmitted to the circuit board through the position where the notch 15 contacts the circuit board, so that the force is dispersed and the weld seam is prevented from being torn due to high local force intensity. When the relay 3 presses down the welding plate 2, the stress of the front and rear tilting of the connecting piece body can be transmitted through the notch 15 through the circuit board to limit the first welding leg 12, the second welding leg 13 and the third welding leg 14, so that the stress is transmitted to the circuit board, making the supporting force more stable.

[0048] In this embodiment, a limiting block 151 is provided in the notch 15, and the limiting block 151 is connected to the flange 11. Through the setting of the limiting block 151, after the first solder leg 12, the second solder leg 13 and the third solder leg 14 are inserted into the circuit board, the insertion depth is limited, so that the side of the notch 15 away from the opening can be in contact with the circuit board through the limiting block 151, thereby increasing the friction force to avoid being in a suspended state, which causes easy shaking.

[0049] In some optional embodiments, see Figure 1-3 As shown, in the electrical connecting sheet, local protrusions are provided on both side walls of the welding end 1 to form reinforcing ribs 16, and a groove 17 is formed correspondingly on the side opposite to the reinforcing rib 16. There are several reinforcing ribs 16, and the reinforcing ribs 16 and the grooves 17 are arranged alternately on the side walls of both sides of the welding end 1, so that the side walls of both sides of the welding end 1 are provided with reinforcing ribs 16 and grooves 17. When the welding end 1 is inserted into the welding hole of the circuit board, there is a gap between the welding end 1 and the welding hole. First, the gap is filled by setting the reinforcing ribs 16 to reduce the tilted position of the welding end 1, so that the connection strength and support strength of the welding end 1 are improved.

[0050] When welding the third welding leg 14 through the groove 17, part of the solder will flow into the groove 17 through the gap between the groove 17 and the welding hole, which can increase the contact area between the solder and the welding end 1, and make the solder filling more full, making the welding tighter.

[0051] In some optional embodiments, see Figure 4-5As shown, in the electrical connecting sheet, the flange 11 includes a first flange 111 and a second flange 112, and the third weld leg 14 is arranged at an end of the welding end 1 away from the welding plate 2. The connection between the first flange 111 and the welding end 1 extends toward the circuit board to form a first weld leg 12, and the cross-section of the first weld leg 12 is L-shaped. The connection between the second flange 112 and the welding end 1 extends toward the circuit board to form a second weld leg 13, and the cross-section of the second weld leg 13 is L-shaped.

[0052] In addition to the first, second and third welding legs 12, 13 and 14 in the shape of a triangle in the above embodiment, the connecting piece body of the present application may also be the structure in the present embodiment, and the welding end 1 in the present embodiment may preferably not adopt the structure of the reinforcing rib 16 in the above embodiment, so that the welding end 1 is a plane, and the first, second and third welding legs 12, 13 and 14 are arranged side by side at intervals, wherein the third welding leg 14 is an extension of the welding end 1 away from one end of the welding plate 2, the first welding leg 12 is an extension of the connection between the first flange 111 and the third welding leg 14, the second welding leg 13 is an extension of the connection between the second flange 112 and the third welding leg 14, the cross-sections of the first welding leg 12 and the second welding leg 13 are both L-shaped, and the corresponding welding holes of the first welding leg 12 and the second welding leg 13 on the circuit board are also L-shaped. When the first welding leg 12 and the second welding leg 13 are inserted into the circuit board, the L-shaped setting makes the contact between them and the circuit board more fitted, the contact area is increased, and the solder filling can be made fuller, thereby improving the stability of welding.

[0053] When the welding end 1 is inserted into the circuit board, the first flange 111 and the second flange 112 are abutted against the circuit board at one end away from the welding plate 2, for supporting the welding plate 2 and limiting the welding position and insertion height of the first welding leg 12, the second welding leg 13 and the third welding leg 14. At the same time, the first flange 111 and the second flange 112 are provided with an opening toward the circuit board on one side close to the first welding leg 12 and the second welding leg 13, so that the solder can flow into the opening when the first welding leg 12 and the second welding leg 13 are welded, thereby enhancing the welding strength and making the solder wrap completely.

[0054] In some optional embodiments, see Figure 1-4As shown, in the electrical connecting piece, the welding plate 2 and the welding end 1 are connected to each other, and the welding plate 2 is provided with a positioning hole 21 for locating the welding position of the relay 3 and a welding reference hole 22 for locating the welding position of the connecting piece. Before the relay 3 is welded to the welding plate 2, the electrical positioning column 31 on the relay 3 is inserted into the positioning hole 21, so that the relay 3 can be positioned at the corresponding welding position, and then the relay 3 is welded to fix the relay 3 on the welding plate 2 and connect it to the connecting piece. When the connecting piece is installed on the circuit board, firstly, the first A first solder leg 12, a second solder leg 13 and a third solder leg 14 are inserted into the soldering hole of the circuit board. A laser locator is provided above the connecting piece so that the laser is emitted from top to bottom. By moving the connecting piece, the first solder leg 12, the second solder leg 13 and the third solder leg 14 are changed in angle and offset in the soldering hole to change the position of the soldering reference hole 22, so that the laser irradiated by the laser locator can pass through the soldering reference hole 22, thereby positioning the soldering position of the connecting piece, and then the first solder leg 12, the second solder leg 13 and the third solder leg 14 are soldered and fixed.

[0055] When the BDU active circuit board is being transported, the connecting piece has been welded to the circuit board. During the packaging process, it is placed under the welding plate 2 through a temporary support column and then inserted into the positioning hole 21 to temporarily support the connecting piece to avoid bending and other damage to the connecting piece caused by collision and extrusion during transportation, resulting in deformation, thereby improving the safety of the connecting piece during transportation.

[0056] In some optional embodiments, see Figure 1-4 As shown, in the electrical connecting sheet, the welding plate 2 is an L-shaped plate body composed of a narrow plate and a wide plate.

[0057] In this embodiment, the wide plate of the welding plate 2 is the welding surface 23 .

[0058] In this embodiment, third flanges 24 facing the circuit board are provided on both sides of the narrow plate of the welding plate 2 , and the load strength of the welding plate 2 is enhanced by the third flanges 24 .

[0059] The L-shaped welding plate 2 makes it convenient for the welding gun to extend from the bottom of the welding plate 2 for welding, that is, the wide plate is welded at the position of the narrow plate. The positioning hole 21 is preferably located on the narrow plate in this embodiment, so the welding surface 23 needs to be located on the wide plate to be welded with the relay 3.

[0060] See also Figure 1-6 As shown, a second aspect of an embodiment of the present application provides a relay, and the relay 3 is provided with an electrical positioning column 31 connected to the positioning hole 21 .

[0061] Before welding the relay 3 to the welding plate 2, the electrical positioning column 31 on the relay 3 is inserted into the positioning hole 21 to position the relay 3 at the corresponding welding position. Then, the relay 3 is welded to fix the relay 3 on the welding plate 2 and connect it to the connecting piece.

[0062] By inserting the electrical positioning column 31 into the positioning hole 21, firstly, the relay 3 is prevented from arbitrarily shifting and sliding during welding, thereby improving the welding efficiency. Secondly, during use, the electrical positioning column 31 is used as a limiter to prevent the relay 3 from swaying due to vibration and shaking after welding. The impact of the swing is transmitted to the welding surface 23, which makes it easy for the welding point to increase the stress locally in any direction, thereby causing tearing, causing the relay 3 to fall and damaging the product. By inserting the electrical positioning column 31 into the positioning hole 21, when the relay 3 swings due to vibration and shaking, the electrical positioning column 31 is subjected to stress, which limits the shaking and swinging of the relay 3, thereby preventing the welding surface 23 from being locally increased in any direction. The resistance to stress is improved and the service life is increased.

[0063] Working principle and process of this application:

[0064] When installing the connecting piece on the circuit board, first insert the first solder leg 12, the second solder leg 13 and the third solder leg 14 into the soldering hole of the circuit board. A laser locator is provided above the connecting piece to emit laser from top to bottom. By moving the connecting piece, the first solder leg 12, the second solder leg 13 and the third solder leg 14 are changed in angle and offset in the soldering hole to change the position of the soldering reference hole 22, so that the laser irradiated by the laser locator can pass through the soldering reference hole 22, thereby positioning the soldering position of the connecting piece, and then the first solder leg 12, the second solder leg 13 and the third solder leg 14 can be welded and fixed.

[0065] Before welding the relay 3 to the welding plate 2, the electrical positioning column 31 on the relay 3 is inserted into the positioning hole 21 to position the relay 3 at the corresponding welding position. Then, the relay 3 is welded to fix the relay 3 on the welding plate 2 and connect it to the connecting piece.

[0066] When the relay 3 is welded on the welding plate 2, the welding plate 2 is pressed down by gravity, and the force is transmitted to the welding end 1 and the flange 11, and then transmitted to the circuit board. The flange 11 provides auxiliary support for the force to prevent the welding end 1 from being fully stressed. As a result, when the welding plate 2 is pressed down after welding, the welding end 1 will also bend, thereby destroying the circuit structure and damaging the product.

[0067] When the electrical positioning column 31 is inserted into the positioning hole 21, firstly, the relay 3 is prevented from arbitrarily shifting and sliding during welding, thereby improving the welding efficiency. Secondly, during use, the electrical positioning column 31 is used as a limiter to prevent the relay 3 from swaying due to vibration and shaking after welding. The impact of the swing is transmitted to the welding surface 23, which makes it easy for the welding point to increase the stress locally in any direction, thereby causing tearing, causing the relay 3 to fall and damage the product. When the electrical positioning column 31 is inserted into the positioning hole 21, when the relay 3 is shaken by vibration and shaking, the electrical positioning column 31 is subjected to stress, which limits the shaking and swinging of the relay 3, thereby preventing the welding surface 23 from being locally increased in any direction. The resistance to stress is improved and the service life is increased.

[0068] By replacing the existing wiring harness with the welding end 1 and the welding plate 2, the BDU main control circuit board can be directly welded and fixed during production, avoiding the complex structure of the wiring harness, which leads to unnecessary stress and easy confusion of the internal structure. The production also requires wiring and the volume required for production will also increase relatively, reducing production efficiency.

[0069] When the BDU active circuit board is being transported, the connecting piece has been welded to the circuit board. During the packaging process, it is placed under the welding plate 2 through a temporary support column and then inserted into the positioning hole 21 to temporarily support the connecting piece to avoid bending and other damage to the connecting piece caused by collision and extrusion during transportation, resulting in deformation, thereby improving the safety of the connecting piece during transportation.

[0070] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0071] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0072] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An electrical connecting sheet, characterized in that: include: A connecting piece body, the connecting piece body consisting of a welding end (1) and a welding plate (2), the connecting piece body being in an L-shape turned 90° clockwise; The welding end (1) is provided with flanges (11) on both sides, one end of the flange (11) is in contact with the welding plate (2), and the other end can be supported on the circuit board and connected to the circuit board; The welding end (1) and the flange (11) are respectively provided with a first welding leg (12), a second welding leg (13) and a third welding leg (14).

2. The electrical connecting sheet according to claim 1, wherein: The flange (11) comprises a first flange (111) and a second flange (112); The first welding leg (12) is arranged at an end of the first flange (111) away from the welding plate (2), and the second welding leg (13) is arranged at an end of the second flange (112) away from the welding plate (2); The third welding leg (14) is arranged at an end of the welding end (1) away from the welding plate (2); The first soldering foot (12) and the second soldering foot (13) are both spaced apart from the third soldering foot (14), and form a notch (15) opening toward the circuit board.

3. The electrical connecting sheet according to claim 2, wherein: A limiting block (151) is arranged in the notch (15), and the limiting block (151) is connected to the flange (11).

4. The electrical connecting sheet according to claim 1, wherein: The side walls on both sides of the welding end (1) are provided with local protrusions to form reinforcing ribs (16), and a groove (17) is correspondingly formed on the side opposite to the reinforcing ribs (16).

5. The electrical connecting sheet according to claim 1, wherein: The flange (11) comprises a first flange (111) and a second flange (112); The third welding leg (14) is arranged at an end of the welding end (1) away from the welding plate (2); The connection between the first flange (111) and the welding end (1) extends toward the circuit board to form a first welding foot (12), and the cross section of the first welding foot (12) is L-shaped; The connection between the second flange (112) and the welding end (1) extends towards the circuit board to form a second welding foot (13); the cross section of the second welding foot (13) is L-shaped.

6. The electrical connecting sheet according to claim 1, wherein: The welding plate (2) is provided with a positioning hole (21) for positioning the welding position of the workpiece and a welding reference hole (22) for positioning the welding position of the connecting piece body.

7. The electrical connecting sheet according to claim 1, wherein: The welding plate (2) is an L-shaped plate body composed of a narrow plate and a wide plate.

8. The electrical connecting sheet according to claim 7, characterized in that: The wide plate of the welding plate (2) is the welding surface (23).

9. The electrical connecting sheet according to claim 7, wherein: Third flanges (24) facing the circuit board are arranged on both sides of the narrow plate of the welding plate (2).

10. A relay, the relay using the electrical connecting piece according to any one of claims 1 to 9, characterized in that: The relay (3) is provided with an electrical positioning column (31) connected to the positioning hole (21).

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