Current detection device and manufacturing method thereof

Abstract

The present application provides a current detection device and a manufacturing method thereof, wherein the device comprises two conductors, a resistor and two detection points. The resistor is arranged between the two conductors. The detection terminal of the detection point comprises a first terminal portion and a second terminal portion. The first terminal portion comprises a first flange and a second flange, the second flange is connected to the second terminal portion, and at least a portion thereof is buried in the conductor. The first flange is buried in the conductor, and the top end of the first flange does not protrude from the second surface of the conductor, and the top end of the first flange maintains a distance from the second surface, a gap is defined between the first flange and the second flange, and at least a portion of the gap is filled with the material of the at least one conductor. The present application can more easily control the length of the second terminal portion protruding from the first surface.

Description

Technical Field

[0001] The present invention relates to a current detection device and a manufacturing method thereof, and more particularly to a current detection device and a manufacturing method thereof for improving processing efficiency. Background Art

[0002] Current detection devices are commonly used in various electrical devices. Usually, the current detection device includes a resistor and a pair of electrodes. The resistor is a plate-shaped resistor made of a metal material with a small resistance temperature coefficient, and the electrodes are made of a metal material with high conductivity and connected to both ends of the resistor.

[0003] According to the prior art, the manufacture of current detection devices utilizes surface welding processes or surface soldering processes. However, this method may cause the detection terminals to shift under the high temperature environment of multiple welding processes, resulting in changes in resistance value and loss of detection accuracy. Another method is to coat solder on the electrodes on both sides of the current detection device and then connect them to the printed circuit board (PCB) through surface mounting technology (SMT). However, the high temperature operating conditions of multiple welding processes can cause the electrodes or solder to melt and the resistance to change.

[0004] In the current detection technology of automobile batteries, etc., a shunt current detection method using a metal plate resistor is also used. For example, U.S. Patent No. US10564188B2 discloses a current detection device, which has a bend, an upper flange, and at least one of a lower flange formed on the voltage detection terminal, and a through hole is formed on the electrode. After the voltage detection terminal passes through the through hole, the voltage detection terminal is fixed to the electrode through at least one of the bend, the upper flange, and the lower flange. Therefore, a protruding portion is formed on the surface of the electrode to fix the voltage detection terminal. To eliminate the protruding portion, it is necessary to additionally form a groove on the surface of the electrode to accommodate the bend, the upper flange, or the lower flange, and then squeeze the protruding portion into the groove.

[0005] According to the technology of the aforementioned patent, it is necessary to reserve deformation dimensions at the bottom of the voltage detection terminal, and the damage to the coating must be considered during deformation. In addition, the processing technology of the prior art is relatively complicated, and there are still slightly protruding parts due to process tolerances. The base joint of the voltage detection terminal is prone to protruding from the upper and lower surfaces of the electrode. Moreover, the length of the probe part, that is, the upper extension length of the voltage detection terminal, is affected by both the process tolerance and the tolerance of the raw materials of the voltage detection terminal, and cannot be effectively controlled within the predetermined size. Summary of the invention

[0006] According to one embodiment of the present invention, an object is to provide a current detection device and a manufacturing method thereof, which can improve processing efficiency. In one embodiment, an object is to provide a current detection device and a manufacturing method thereof, which can more easily control the protruding length of the second terminal portion from the first surface compared to the prior art.

[0007] According to one embodiment of the present invention, a current detection device is provided, which includes two conductors, a resistor and two detection points. At least one of the two conductors includes a first surface and a second surface, and defines at least one hole, which extends from the first surface into the at least one conductor. The resistor is arranged between the two conductors. The two detection points are respectively arranged on the two conductors, and at least one of the two detection points is a detection terminal including a first terminal part and a second terminal part, and at least a part of the first terminal part is inserted into the hole. The first terminal part includes a first flange and a second flange, the second flange is connected to the second terminal part, and at least a part of the second flange is buried in the at least one conductor. The first flange is buried in the conductor, and a top end of the first flange does not protrude from the second surface, and the top end of the first flange maintains a distance from the second surface, a gap is defined between the first flange and the second flange, and at least a part of the gap is filled with the material of the at least one conductor. The width of the second flange is greater than the width of the first flange.

[0008] In one embodiment, the width of the first flange is less than or equal to the width of the hole, and the width of the second flange is greater than the width of the hole.

[0009] In one embodiment, the length of the first terminal portion is smaller than the thickness of the at least one conductor.

[0010] In one embodiment, the resistance value or resistivity of the conductor is smaller than the resistance value or resistivity of the resistor.

[0011] In one embodiment, the second flange does not protrude from the first surface. In one embodiment, the hole does not penetrate the conductor, and the top of the first flange is buried in the conductor. In one embodiment, the top of the first flange does not contact the bottom of the hole.

[0012] In one embodiment, the volume of the second flange protruding from the first terminal portion is greater than or equal to the volume of the accommodation space of the gap. Preferably, the volume of the second flange protruding from the first terminal portion is greater than or equal to 2.6 times the volume of the accommodation space of the gap.

[0013] In one embodiment, a chamfer is formed at the top of the first flange, and the shape of the chamfer is suitable for guiding the first flange into the hole.

[0014] In one embodiment, the hardness of the at least one conductor is smaller than the hardness of the at least one detection terminal.

[0015] In one embodiment, the hole penetrates the at least one conductor, so that the top end of the first flange is exposed.

[0016] According to one embodiment of the present invention, a method for manufacturing a current detection device is provided, which includes the following steps. Two conductors and a resistor are provided. The resistor is welded between the two conductors. A hole is formed in at least one conductor, the at least one conductor includes a first surface and a second surface, and defines a hole, and the hole extends from the first surface into the at least one conductor. A detection terminal is provided, and the detection terminal includes a first terminal portion and a second terminal portion. The first terminal portion includes a first flange and a second flange, the second flange is connected to the second terminal portion, a gap is defined between the first flange and the second flange, and the width of the second flange is greater than the width of the first flange, the width of the second flange is greater than the width of the hole, and the width of the first flange is less than or equal to the width of the hole. The first terminal portion is inserted into the hole, and after the first flange is inserted into the hole, at least a portion of the second flange is buried in the conductor to squeeze the hole so that the material at the edge of the hole is filled into the accommodation space of the gap.

[0017] In one embodiment, the manufacturing method of the current detection device further comprises: a welding step and a cutting step. In the welding step, the resistor and the at least one conductor are melted and joined by a welding process. Moreover, the welding process comprises at least one of laser beam welding, electron beam welding, and spot welding. In the cutting step, the welded resistor and the two conductors are cut into one or more current detection devices of specific shapes.

[0018] In one embodiment, the resistance value or resistivity of the conductor is smaller than the resistance value or resistivity of the resistor.

[0019] In one embodiment, the step of inserting the first terminal portion into the hole includes the following steps: a rivet head is pressed against the second flange, and the rivet head protrudes from a side surface of the second flange. The first terminal portion is pressed into the hole until the portion of the rivet head protruding from the side surface of the second flange abuts against the first surface of at least one conductor.

[0020] In one embodiment, the step of forming the hole includes: not making the hole penetrate the at least one conductor. Moreover, the depth of the hole is greater than the length of the first terminal portion, so that the top of the first flange maintains a distance from the second surface.

[0021] In one embodiment, the step of providing a conductor includes: forming a hole such that a diameter of a portion of the hole close to the second surface is not larger than a diameter of a portion of the hole close to the first surface.

[0022] In one embodiment, the volume of the second flange protruding from the first terminal portion is greater than or equal to the volume of the accommodation space of the gap. Preferably, in one embodiment, the volume of the second flange protruding from the first terminal portion is greater than or equal to 2.6 times the volume of the accommodation space of the gap.

[0023] In summary, according to an embodiment of the present invention, since the top of the first flange maintains a distance h1 from the second surface, the tail end of the detection terminal does not deform and the plating on the detection terminal is not easily damaged. In addition, the top of the first flange does not protrude from the second surface, so that the second surface of the conductor remains flat. In one embodiment, it is easier to control the length of the second terminal protruding from the first surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1A A schematic three-dimensional diagram showing a current detection device according to an embodiment of the present invention.

[0025] Figure 1B show Figure 1A Schematic side view of a current sensing device of an embodiment.

[0026] Figure 1C show Figure 1A Schematic top view of a current detection device according to an embodiment.

[0027] Figure 2 show Figure 1A A schematic cross-sectional view of the current detection device of the embodiment taken along line AA.

[0028] Figure 3 The flowchart shows a method for manufacturing a current detection device according to an embodiment of the present invention.

[0029] Figure 4A Show the invention Figure 2 A schematic diagram of a step of a method for manufacturing a current detection device according to an embodiment.

[0030] Figure 4B Show the invention Figure 2 A schematic diagram of a step of a method for manufacturing a current detection device according to an embodiment.

[0031] Figure 4C Show the invention Figure 2 A schematic diagram of a step of a method for manufacturing a current detection device according to an embodiment.

[0032] Figure 5A A schematic diagram showing a detection terminal according to an embodiment of the present invention is shown in FIG. 1 .

[0033] Figure 5B A schematic diagram showing a detection terminal according to an embodiment of the present invention is shown in FIG. 1 .

[0034] Figure 5C A schematic diagram showing a detection terminal according to an embodiment of the present invention is shown in FIG. 1 .

[0035] Figure 5D A schematic diagram showing a detection terminal according to an embodiment of the present invention is shown in FIG. 1 .

[0036] Figure 5E A schematic diagram showing a detection terminal according to an embodiment of the present invention is shown in FIG. 1 .

[0037] Fig. 5F A schematic diagram showing a detection terminal according to an embodiment of the present invention is shown in FIG. 1 .

[0038] Figure 6 A bottom view of the plurality of first flanges is shown.

[0039] Fig. 7A A schematic cross-sectional view taken along line AA of a current detection device according to another embodiment of the present invention is shown.

[0040] Figure 7B A schematic cross-sectional view taken along line AA of a current detection device according to another embodiment of the present invention is shown.

[0041]

Explanation of symbols

[0042] 100: current detection device;

[0043] 102: two detection points;

[0044] 103: resistor;

[0045] 110: Conductor;

[0046] 111: first surface;

[0047] 112: second surface;

[0048] 113: Holes;

[0049] 114: fixing hole;

[0050] 120: detection terminal;

[0051] 121: first terminal portion;

[0052] 122: second terminal portion;

[0053] 129: Materials around the hole;

[0054] 131: joint part;

[0055] 132: joint part;

[0056] 211: first flange;

[0057] 212: second flange;

[0058] 212a: upper protrusion;

[0059] 212b: middle protuberance;

[0060] 212c: lower protrusion;

[0061] 213: Gap;

[0062] 213a: top surface of the accommodation space;

[0063] 213b: bottom surface of the accommodation space;

[0064] 214: third flange;

[0065] 218: chamfer;

[0066] 222: protruding part;

[0067] 310: Rivet head;

[0068] 318: medial surface;

[0069] 319: Outer surface. DETAILED DESCRIPTION

[0070] In the following, the details will be described with reference to the accompanying drawings, the contents of which also constitute part of the detailed description of the specification, and are depicted in a specific example description method that can implement the embodiment. The following embodiments have described sufficient details to enable technicians in the field to implement them. Of course, other embodiments may also be adopted, or any structural, logical, and electrical changes may be made without departing from the embodiments described in the text. Therefore, the detailed description below should not be regarded as limiting, but rather, the embodiments contained therein will be defined by the scope of protection of the attached claims. The drawings illustrating various embodiments of the device are not drawn to scale, and in particular, certain dimensions are exaggerated for clarity and are shown in the drawings.

[0071] Figure 1A A schematic three-dimensional diagram showing a current detection device according to an embodiment of the present invention. Figure 1B show Figure 1A Schematic side view of a current sensing device of an embodiment. Figure 1C show Figure 1A A schematic top view of a current detection device according to an embodiment of the present invention. Figures 1A to 1CAs shown, the current detection device 100 includes two conductors 110, a resistor 103 and two detection points 102. The resistor 103 is disposed between the two conductors 110. The two detection points 102 are respectively disposed on the two conductors 110, close to the two ends of the resistor 103. The current detection device 100 selectively includes two fixing holes 114, which are respectively disposed at the ends of the two conductors 110, so that a fixing member (not shown), such as a screw, can pass through the fixing holes 114 to lock the current detection device 100 on the power system (not shown). When the current detection device 100 is connected in series to the battery path of the power system, the current to be measured will flow from one end of the conductor 110 into the resistor 103, and then flow out from the other end of the conductor 110, and a corresponding detection voltage will be generated between the two detection points 102. The current detection unit (not shown) detects the current value of the current to be measured, such as 100 amperes, by obtaining the detection voltage.

[0072] In one embodiment, the resistor 103 and the two conductors 110 are joined by melting and joining using a welding process, and a joining portion 131 and a joining portion 132 are formed respectively. The welding process is not particularly limited, and may be or include one or more of laser beam welding, electron beam welding, and high current welding (spot welding).

[0073] Figure 2 show Figure 1A A schematic cross-sectional view of the current detection device of the embodiment taken along line AA. Figure 1A and 2 As shown, at least one of the conductors 110 includes a first surface 111 and a second surface 112, and defines at least one hole 113. The hole 113 extends from the first surface 111 into the at least one conductor 110. At least one of the two detection points 102 includes a detection terminal 120. The detection terminal 120 includes a first terminal portion 121 and a second terminal portion 122, and at least a portion of the first terminal portion 121 is inserted into the hole 113. The first terminal portion 121 includes a first flange 211 and a second flange 212, and the second flange 212 is connected to the second terminal portion 122, and the width W2 of the second flange 212 is greater than the width W1 of the first flange 211. Preferably, the width W2 of the second flange 212 is also greater than the width Wb of the second terminal portion 122. At least a portion of the second flange 212 is buried in the at least one conductor 110. In this embodiment, preferably, the second flange 212 can be configured to be embedded in the at least one conductor 110 and not protrude from the first surface 111 .

[0074] In one embodiment, the lateral width W1 of the first flange 211 is less than or equal to the width Wh of the hole 113. Such a design allows the detection terminal 120 to enter the hole 113 more smoothly, and further allows the first flange 211 to be buried in the conductor 110. In one embodiment, a lower top of the first flange 211 does not protrude from the second surface 112, and a distance h1 is maintained between the lower top of the first flange 211 and the second surface 112. In addition, a gap 213 is defined between the first flange 211 and the second flange 212, and the lateral width W2 of the second flange 212 is greater than the width Wh of the hole 113, so as to squeeze the conductor 110, so that the peripheral material 129 of the hole 113 of the conductor 110 enters the gap 213, so that at least a portion of the gap 213 is filled with the material of the at least one conductor 110.

[0075] In one embodiment, the volume V2 of the second flange 212 protruding laterally from the first terminal portion 121 is greater than or equal to the volume Vg of the accommodation space of the gap 213. In one embodiment, when the width Wh of the hole 113 is equal to the lateral width W1 of the first flange 211, the volume V2 of the second flange 212 protruding laterally from the first terminal portion 121 is greater than or equal to the volume Vg of the accommodation space of the gap 213. Preferably, as Figure 2 As shown, the volume V2 of the portion 222 of the second flange 212 protruding laterally from the first terminal portion 121 is greater than or equal to 2.6 times the volume Vg of the accommodation space of the gap 213. Figure 4A As shown, the volume Vg of the gap 213 is the volume between the top surface 213a of the accommodation space, that is, the surface of the first flange 211 extending to the outermost side of the second flange 212, and the bottom surface 213b of the accommodation space. In one embodiment, the hardness of the detection terminal 120 is preferably greater than the hardness of the conductor 110, so that the conductor 110 can be squeezed more advantageously.

[0076] In one embodiment, if Figure 2 As shown, a gap is formed between the top of the first flange 211 and the bottom surface of the hole 113, that is, the lower top of the first flange 211 does not contact the bottom of the hole 113. Alternatively, preferably, the depth h2 of the hole 113 is greater than the length L1 of the first terminal portion 121. According to the above features, it can be further ensured that the second flange 212 does not protrude from the first surface 111, and the length T1 (to be described later) of the second terminal portion 122 protruding from the first surface 111 can be easily controlled.

[0077] In one embodiment, the hole 113 may be a through hole that passes through the first surface 111 and the second surface 112 of the conductor 110. In this embodiment, the lower top of the first flange 211 can be exposed on the second surface 112. However, from the perspective of maintaining the flatness of the second surface 112, the hole 113 may preferably be a blind hole. More specifically, the hole 113 does not pass through the conductor 110, and the lower top of the first flange 211 is buried in the hole 113 of the conductor 110 without exposing the second surface 112.

[0078] Please refer to Figure 2 , the side thrust Fh of a single detection terminal of the present invention can withstand more than 200 Newtons, and the pulling force Fl of a single detection terminal can withstand more than 400 Newtons. The detection terminal of the present invention can avoid or reduce the completion in a high temperature environment of multiple welding processes, so it will not cause displacement and resistance change of the detection terminal. In addition, in one embodiment, the resistance value or resistivity of the conductor 110 is less than the resistance value or resistivity of the resistor 103. Preferably, the resistance value or resistivity of the conductor 110 is less than 10 times the resistance value or resistivity of the resistor 103. The so-called resistivity is the resistance value of a certain substance per unit length and unit cross-section. More specifically, the resistivity value can be equal to the resistance value of the substance with a length of one meter and a cross-section of one square meter. The conductor 110 can be an alloy material of copper, aluminum or a combination thereof, the resistor 103 can be an alloy material of copper-manganese-tin alloy, copper-manganese-nickel alloy, nickel-chromium-aluminum-silicon alloy or a combination thereof, and the detection terminal 120 can be an alloy material of red copper, brass, phosphor bronze, metallurgical aluminum, chromium-zirconium-copper (CrZrCu), beryllium copper, stainless steel or a combination thereof.

[0079] Figure 3 The flowchart shows a method for manufacturing a current detection device according to an embodiment of the present invention. Figure 4A Show the invention Figure 2 A schematic diagram of a step of a method for manufacturing a current detection device according to an embodiment. Figure 4B Show the invention Figure 2 A schematic diagram of a step of a method for manufacturing a current detection device according to an embodiment. Figure 4C Show the invention Figure 2 A schematic diagram of a step of a method for manufacturing a current detection device according to an embodiment.

[0080] like Figure 3 , Figures 4A to 4C As shown, a method for manufacturing a current detection device 100 according to an embodiment of the present invention includes the following steps.

[0081] Step S02: providing two conductors 110 and a resistor 103 .

[0082] Step S04: welding the resistor 103 between the two conductors 110. Step S04 may include a welding step, using a welding process to melt and join the resistor and the at least one conductor 110. Moreover, the welding process includes at least one of laser beam welding, electron beam welding, and spot welding.

[0083] Step S06: forming a hole 113 in at least one of the two conductive bodies 110. Figure 4A As shown, the at least one conductor 110 includes a first surface 111 and a second surface 112, and the hole 113 extends from the first surface 111 into the at least one conductor 110. In one embodiment, the aperture of the portion of the hole 113 close to the second surface 112 is not larger than the aperture of the portion of the hole 113 close to the first surface 111. From the perspective of processing convenience, it is preferred that the aperture of each portion of the hole 113 is substantially the same. Compared with the aforementioned existing patented technology, there is no need to additionally consider the shape of the detection terminal to form the hole, and the requirements for the precision of the processing of the hole 113 are lower.

[0084] Step S08: Provide a detection terminal 120, the detection terminal 120 includes a first terminal portion 121 and a second terminal portion 122. The first terminal portion 121 includes a first flange 211 and a second flange 212, the second flange 212 is connected to the second terminal portion 122, a gap 213 is defined between the first flange 211 and the second flange 212, and a width W2 of the second flange 212 is greater than a width W1 of the first flange 211, the width W2 of the second flange 212 is greater than a width Wh of the hole 113, and the width W1 of the first flange 211 is less than or equal to the width Wh of the hole 113.

[0085] Step S10: Figure 4B As shown, the first terminal portion 121 is inserted into the hole 113, and the first flange 211 is inserted into the hole 113, and then, as shown in FIG. Figure 4C As shown, at least a portion of the second flange 212 is embedded in the conductor 110 to squeeze the hole 113, so that the hole surrounding material 129 is filled into the accommodation space of the gap 213. Preferably, the hardness of the detection terminal 120 is greater than the hardness of the conductor 110, so that the conductor 110 can be squeezed more advantageously.

[0086] In one embodiment, the width W2 of the second flange 212 is greater than the width Wb of the second terminal portion 122. Step S10 is to use a riveting head (the head of a riveting hammer) 310 of a riveting machine (not shown) to clamp the second terminal portion 122 of the detection terminal 120. Figure 4A As shown, when the bottom surface of the rivet head 310 abuts against the upper surface of the second flange 212, the side edge of the rivet head 310 protrudes from at least one side edge of the second flange 212. Figure 4B As shown, the riveting machine controls the rivet head 310 to move downward, and presses the first terminal portion 121 into the hole 113 until the portion of the rivet head 310 protruding from the side of the second flange 212 abuts against the first surface 111 of at least one conductor 110 (such as Figure 2 At this time, the lower top of the first flange 211 still maintains a distance h1 from the second surface 112 and does not protrude from the second surface 112, so that when the rivet head 310 moves downward, it will not encounter too much resistance, so that it can be ensured that the second flange 212 does not protrude from the first surface 111, and the length T1 of the second terminal portion 122 protruding from the first surface 111 can be easily controlled. In addition, in a preferred embodiment, the depth h2 of the hole 113 is greater than the length L1 of the first terminal portion 121, so that the lower top of the first flange 211 will not be resisted by the conductor 110, and the second flange 212 can enter the conductor 110 more smoothly.

[0087] As described above, when the rivet head 310 is against the first surface 111 of the conductor 110, the riveting machine will feel a great resistance and stop applying pressure. In this way, the depth of the first terminal portion 121 entering the conductor 110 can be controlled by sensing and controlling the size of the pressure. Therefore, it is also possible to more easily control the height T1 of the second terminal portion 122 of the detection terminal 120 protruding from the first surface 111. According to the technology of the aforementioned existing patent, it is necessary to deform the bottom end of the detection terminal. Compared with this, the present embodiment does not need to deform the bottom end of the detection terminal 120, so the shape of the detection terminal 120 can be roughly kept fixed, and only a part of the second flange 212 is slightly deformed due to extrusion. Since the detection terminal 120 does not need to be deformed, its plating is not easily damaged and can have better electrical performance. In addition, the needle implantation and riveting procedures are both performed in the same direction, and there is no need to implant the needle on the front side of the electrode as in the existing patent technology, and process the detection terminal on the back side to form a curved portion, so the manufacturing method of the present embodiment has a higher processing efficiency.

[0088] Step S12 is a cutting step for cutting the welded resistor 103 and the two conductors 110 into one or more current detection devices 100 of specific shapes. Thus, the current detection device 100 is obtained. The cutting step S12 may be performed before the step S04 of installing the detection terminal 120, or after the step S04 of installing the detection terminal 120. In some examples, the cutting step S12 further includes forming a fixing hole 114 for at least one conductor 100.

[0089] Figure 5A A schematic diagram showing a detection terminal of an embodiment of FIG. 1 of the present invention is shown. Figure 5A As shown, a chamfer 218 is formed at the lower top of the first flange 211, and the shape of the chamfer is suitable for guiding the first flange 211 into the hole 113. Preferably, a chamfer 219 is also formed at the lower top of the second flange 212, and the chamfer 219 is an inclined surface, and its shape is suitable for guiding the second flange 212 into the conductor 110. In addition, the formation of the chamfer 219 also allows the side bottom of the second flange 212 to be subjected to a more even force, and is less likely to be deformed due to extrusion.

[0090] Figure 5B A schematic diagram showing a detection terminal of an embodiment of FIG. 1 of the present invention is shown. Figure 5B As shown, in one embodiment, the first flange 211 may be disposed on only one side of the detection terminal 120 . Figure 5C A schematic diagram showing a detection terminal of an embodiment of FIG. 1 of the present invention is shown. Figure 5C As shown, in one embodiment, the first flange 211 is formed in a downward trapezoidal shape. Figure 5D A schematic diagram showing a detection terminal of an embodiment of FIG. 1 of the present invention is shown. Figure 5D As shown, in one embodiment, the gap 213 has a curved surface located between the first flange 211 and the second flange 212 . Figure 5E A schematic diagram showing a detection terminal of an embodiment of FIG. 1 of the present invention is shown. Figure 5E As shown, the first terminal portion 121 further includes a third flange 214. The third flange 214 is located between the first flange 211 and the second flange 212, and is formed in the gap 213. In addition, relative to the side surface of the second terminal portion 122, the protruding width of the second flange 212 is greater than the protruding widths of the first flange 211 and the third flange 214. The protruding width of the first flange 211 is greater than the protruding width of the third flange 214. Fig. 5F A schematic diagram showing a detection terminal of an embodiment of FIG. 1 of the present invention is shown. Fig. 5FAs shown, the second flange 212 includes an upper protrusion 212a, a middle protrusion 212b and a lower protrusion 212c. The middle protrusion 212b is located between the upper protrusion 212a and the lower protrusion 212c. Relative to the side surface of the second terminal portion 122, the protrusion width of the middle protrusion 212b is greater than the protrusion width of the upper protrusion 212a and the lower protrusion 212c, and the protrusion width of the lower protrusion 212c is greater than the protrusion width of the upper protrusion 212a. It should be noted that FIG. 5B to FIG. 5F Embodiment similar to Figure 5A Therefore, in the above description, the same elements use the same symbols and their related descriptions are omitted.

[0091] It should be noted that the present invention is not limited to the shape of the first flange 211 . Figure 6 The bottom view of the plurality of first flanges 211 is shown, and the shapes of the bottom surfaces of the first flanges 211 according to different embodiments are shown. Figure 6 The bottom surface of the first flange 211 can be an ellipse as shown in (a), a circle as shown in (b), a rectangle as shown in (c), a hexagon as shown in (d), etc.

[0092] According to an embodiment of the present invention, since the length L1 of the first terminal portion 121 is less than the thickness D1 of the conductor 110, during the manufacturing process, when the first terminal portion 121 is pushed into the conductor 110, the distance h1 between the lower top of the first flange 211 and the second surface 112 can be used to absorb the tolerance, and the length T1 of the second terminal portion 122 protruding from the first surface 111 can be easily controlled. Furthermore, if the tolerance of the raw material is too large, that is, if the length L1 of the first terminal portion 121 is too long, the distance h1 between the lower top of the first flange 211 and the second surface 112 can be used to prevent the lower top of the first flange 211 from protruding from the second surface 112, or one upper end of the second flange 212 from protruding from the first surface 111.

[0093] Fig. 7A A schematic cross-sectional view taken along line AA of a current detection device according to another embodiment of the present invention is shown. Fig. 7AAs shown in another embodiment, the bottom surface of the rivet head 310 is a surface with a step and includes an inner surface 318 and an outer surface 319. The inner surface 318 is used to abut against the upper top surface of the second flange 212, and the outer surface 319 is used to abut against the first surface 111. In this embodiment, the inner surface 318 of the bottom surface of the rivet head 310 protrudes from the outer surface 319 of the bottom surface of the rivet head 310. If the tolerance of the raw material is too large, that is, the length L2 of the second terminal portion 122 is too long, the inner surface 318 of the bottom surface of the rivet head 310 can be used to abut against the upper top surface of the second flange 212, so that the second flange 212 is selectively completely pushed into the conductor 110, that is, the upper top surface of the second flange 212 is lower than the first surface 111, thereby adjusting the length T1 of the second terminal portion 122 protruding from the first surface 111, so that the tolerance of the length T1 is reduced, that is, it meets the predetermined specifications. Figure 7B A schematic cross-sectional view taken along line AA of a current detection device according to another embodiment of the present invention is shown. Figure 7B Embodiment similar to Fig. 7A Therefore, in the following description, the same elements are marked with the same symbols and their related descriptions are omitted. Figure 7B As shown, different from Fig. 7A In an embodiment, according to product design, the outer surface 319 of the bottom surface of the rivet head 310 may protrude from the inner surface 318 of the bottom surface of the rivet head 310 .

[0094] In summary, according to an embodiment of the present invention, since the lower top of the first flange 211 maintains a distance h1 from the second surface 112, it is not necessary to deform the detection terminal 120 on the second surface 112 side to form a flange or a bent portion, the plating on the detection terminal 120 is not easily damaged, and the service life of the rivet head 310 is relatively high. Furthermore, according to an embodiment of the present invention, since there is no need to reserve a thickness for the deformation of the detection terminal 120, the thickness of the conductor 110 can be relatively small. For example, when the width of the detection terminal 120 is 1 mm, the minimum thickness of the conductor 110 can be 1.7 mm, and the minimum width of the second flange 212 can be 2 mm; for example, when the width of the detection terminal 120 is 3 mm, the minimum width of the second flange 212 can be 5 mm, and the minimum thickness of the conductor 110 can be 2.0 mm. Moreover, the lower top of the first flange 211 does not protrude from the second surface 112, and no additional processing procedures are required, and the second surface 112 can be easily kept flat. In one embodiment, it is easier to control the length T1 of the second terminal portion 122 protruding from the first surface 111. The side thrust Fh of a single detection terminal of the present invention can withstand more than 200 Newtons, and the pulling force Fl of a single detection terminal can withstand more than 400 Newtons. The detection terminal of the present invention can avoid or reduce the completion of multiple welding processes in a high temperature environment, so it will not cause displacement and resistance change of the detection terminal.

[0095] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of protection of the claims of the present invention should fall within the scope of the present invention.

Claims

1. A current detection device, characterized in that: Include: Two conductors, at least one of which comprises a first surface and a second surface and defines a hole extending from the first surface into the at least one conductor; A resistor, disposed between the two conductors; as well as Two detection points are respectively arranged on the two conductive bodies, at least one detection point is a detection terminal including a first terminal part and a second terminal part, at least a part of the first terminal part is inserted into the hole, in, The first terminal portion includes a first flange and a second flange, The second flange is connected to the second terminal portion, and at least a portion of the second flange is embedded in the at least one conductor. The first flange is embedded in the at least one conductor, A gap is defined between the first flange and the second flange, and at least a portion of the gap is filled with the material of the at least one conductor that is embedded in the at least one conductor and the hole is squeezed so that the material of the hole edge is filled into the gap. The width of the second flange is greater than the width of the first flange, The width of the first flange is less than or equal to the width of the hole, and the width of the second flange is greater than the width of the hole.

2. The current detection device according to claim 1, characterized in that: The top surface of the accommodating space of the gap is the surface extending from the outermost side of the first flange to the second flange. The hardness of the at least one conductor is smaller than the hardness of the detection terminal, and The bottom end of the detection terminal is not deformed.

3. The current detection device according to claim 1, characterized in that: The length of the first terminal portion is smaller than the thickness of the at least one conductor.

4. The current detection device according to claim 1, characterized in that: The resistance value or resistivity of the at least one conductor is smaller than the resistance value or resistivity of the resistor.

5. The current detection device according to claim 1, characterized in that: The second flange does not protrude from the first surface.

6. The current detection device according to claim 5, characterized in that: The hole does not penetrate the at least one conductor, and the top end of the first flange is buried in the at least one conductor.

7. The current detection device according to claim 6, characterized in that: The top end of the first flange does not contact the bottom of the hole.

8. The current detection device according to claim 1, characterized in that: The volume of the second flange protruding from the first terminal portion is greater than or equal to the volume of the accommodating space of the gap.

9. The current detection device according to claim 8, characterized in that: A volume of the second flange protruding from the first terminal portion is greater than or equal to 2.6 times the volume of the accommodating space of the gap.

10. The current detection device according to claim 1, characterized in that: A chamfer is formed at the top end of the first flange, and the shape of the chamfer is suitable for guiding the first flange to enter the hole.

11. The current detection device according to claim 1, characterized in that: The hardness of the at least one conductor is smaller than the hardness of the detection terminal.

12. The current detection device according to claim 1, characterized in that: The hole penetrates through the at least one conductor to expose the top end of the first flange.

13. The current detection device according to claim 1, characterized in that: The bottom end of the detection terminal is not deformed, and A top end of the first flange does not protrude from the second surface, and the top end of the first flange maintains a distance from the second surface.

14. A method for manufacturing a current detection device, characterized in that: Include: Providing two conductors and a resistor; Welding the resistor between the two conductors; Forming a hole in at least one conductor, wherein the at least one conductor comprises a first surface and a second surface and defines the hole, wherein the hole extends from the first surface into the at least one conductor; A detection terminal is provided, the detection terminal comprising a first terminal portion and a second terminal portion, wherein the first terminal portion comprises a first flange and a second flange, the second flange is connected to the second terminal portion, a gap is defined between the first flange and the second flange, and the width of the second flange is greater than the width of the first flange, the width of the second flange is greater than the width of the hole, and the width of the first flange is less than or equal to the width of the hole; The first terminal portion is inserted into the hole, and the first flange is inserted into the hole, and then at least a portion of the second flange is buried in the at least one conductor to squeeze the hole so that the material at the edge of the hole is filled into the accommodation space of the gap.

15. The method for manufacturing a current detection device according to claim 14, characterized in that: Also includes: a welding step, utilizing a welding process to melt and join the resistor and the at least one conductor, wherein the welding process comprises at least one of laser welding, electron beam welding, and high current welding; and A cutting step is to cut the welded resistor and the two conductors into one or more current detection devices of specific shapes.

16. The method for manufacturing a current detection device according to claim 14, characterized in that: The resistance value or resistivity of the at least one conductor is smaller than the resistance value or resistivity of the resistor.

17. The method for manufacturing a current detection device according to claim 14, characterized in that: The step of inserting the first terminal portion into the hole comprises: A rivet head is pressed against the second flange, and the rivet head protrudes from a side surface of the second flange. The first terminal portion is pressed into the hole until the portion of the rivet head protruding from the side surface of the second flange abuts against the first surface of the at least one conductor.

18. The method for manufacturing a current detection device according to claim 17, characterized in that: The step of forming the hole includes: not allowing the hole to penetrate the at least one conductor, and The depth of the hole is greater than the length of the first terminal portion, so that a top end of the first flange maintains a distance from the second surface.

19. The method for manufacturing a current detection device according to claim 14, characterized in that: The step of forming a hole in at least one conductor comprises: The hole is formed so that a hole diameter of a portion of the hole close to the second surface is not larger than a hole diameter of a portion of the hole close to the first surface.

20. The method for manufacturing a current detection device according to claim 14, characterized in that: The volume of the second flange protruding from the first terminal portion is greater than or equal to the volume of the accommodating space of the gap.

21. The method for manufacturing a current detection device according to claim 20, characterized in that: A volume of the second flange protruding from the first terminal portion is greater than or equal to 2.6 times the volume of the accommodating space of the gap.

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