阅读说明：本技术 电流检测装置及其制造方法 (Current detection device and method for manufacturing same ) 是由 刘柏彣 于 2020-10-23 设计创作，主要内容包括：本申请提供一种电流检测装置及其制造方法,所述装置包含两个导电体、一电阻体及两个检测点。电阻体设置于该两个导电体之间。检测点的检测端子包含一第一端子部及一第二端子部。第一端子部包含一第一凸缘及一第二凸缘,第二凸缘连接于第二端子部,且其至少一部分埋入于导电体中。第一凸缘埋入于导电体中,且第一凸缘的顶端不突出于导电体的第二表面,而且第一凸缘的顶端与第二表面保持一距离,第一凸缘与第二凸缘间界定一间隙,且间隙的至少一部分填充有该至少一导电体的材料。本申请能够较容易地控制第二端子部自第一表面突出的长度。(The application provides a current detection device and a manufacturing method thereof. The resistor is disposed between the two conductors. The detecting terminal of the detecting point 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, and at least a portion of the second flange is embedded in the conductor. The first flange is embedded in the electric conductor, the top end of the first flange does not protrude out of the second surface of the electric conductor, the top end of the first flange keeps a distance with the second surface, a gap is defined between the first flange and the second flange, and at least one part of the gap is filled with the material of the at least one electric conductor. The length of the second terminal portion protruding from the first surface can be easily controlled.)

1. A current sensing device, comprising:

the device comprises two electric conductors, at least one electric conductor comprises a first surface and a second surface, and a hole is defined in the electric conductor, and the hole extends from the first surface to the inside of the electric conductor;

a resistor body arranged between the two electric conductors; and

two detecting points respectively arranged on the two conductors, at least one detecting point is a detecting terminal comprising a first terminal part and a second terminal part, at least one part of the first terminal part is inserted into the hole,

wherein the content of the first and second substances,

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 top end of the first flange does not protrude out of the second surface, and the top end of the first flange keeps a distance with the second surface,

the first flange and the second flange defining a gap therebetween, and at least a portion of the gap being filled with material of the at least one electrical conductor,

the width of the second flange is greater than the width of the first flange.

2. The current sensing device of claim 1, wherein 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.

3. The current sensing device of claim 1, wherein a length of the first terminal portion is less than a thickness of the at least one conductive body.

4. The current detecting device according to claim 1, wherein a resistance value or a resistivity of the at least one conductor is smaller than a resistance value or a resistivity of the resistor.

5. The current sensing device of claim 1, wherein the second flange does not protrude from the first surface.

6. The current sensing device of claim 5, wherein the hole does not extend through the at least one conductor, and wherein the top end of the first flange is embedded in the at least one conductor.

7. The current sensing device of claim 6, wherein the top end of the first flange is free of a bottom of a contact hole.

8. The current detection device according to claim 1, wherein a volume of the second flange protruding from the first terminal portion is greater than or equal to a volume of the accommodation space of the gap.

9. The current detection device according to claim 8, wherein a volume of the second flange protruding from the first terminal portion is greater than or equal to 2.6 times a volume of the accommodation space of the gap.

10. The current sensing device of claim 1, wherein the top end of the first flange is formed with a chamfer shaped to guide the first flange into the hole.

11. The current sensing device of claim 1, wherein the hardness of the at least one electrical conductor is less than the hardness of the sensing terminal.

12. The current sensing device of claim 1, wherein the hole extends through the at least one conductive body to expose the top end of the first flange.

13. A method of manufacturing a current detection device, comprising:

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, and the hole extends from the first surface to the inside of the at least one conductor;

providing a detection terminal, wherein the detection terminal comprises a first terminal part and a second terminal part, the first terminal part comprises a first flange and a second flange, the second flange is connected to the second terminal part, a gap is defined between the first flange and the second flange, the width of the second flange is greater than that of the first flange, the width of the second flange is greater than that of the hole, and the width of the first flange is less than or equal to that of the hole;

and inserting the first terminal part into the hole, inserting the first flange into the hole, and embedding at least one part of the second flange into the at least one conductor so as to extrude the hole and enable the material on the edge of the hole to fill into the accommodating space of the gap.

14. The method of claim 13, further comprising:

a welding step, melting and jointing the resistor body and the at least one conductor by utilizing a welding process, wherein the welding process comprises at least one of laser welding, electron beam welding and high current welding; and

and a cutting step of cutting the resistor and the two conductors into one or more current detection devices with specific shapes.

15. The method of manufacturing a current detection device according to claim 13, wherein a resistance value or a resistivity of the at least one conductor is smaller than a resistance value or a resistivity of the resistor.

16. The method of manufacturing a current detection device according to claim 13, wherein the step of inserting the first terminal portion into the hole includes:

a rivet head is abutted against the second flange and protrudes out of one side surface of the second flange,

and pressing the first terminal part into the hole until the part of the rivet head protruding out of the side surface of the second flange abuts against the first surface of the at least one conductor.

17. The method for manufacturing a current detection device according to claim 16,

the step of forming the hole comprises: without said hole penetrating said at least one electrical conductor, and

the depth of the hole is larger than the length of the first terminal part, so that a top end of the first flange keeps a distance with the second surface.

18. The method of claim 13, wherein the step of forming a hole in the at least one electrical conductor comprises:

the holes are formed such that the hole diameters of portions of the holes near the second surface are not larger than the hole diameters of portions of the holes near the first surface.

19. The method of manufacturing a current detection device according to claim 13, wherein a volume of the second flange protruding from the first terminal portion is greater than or equal to a volume of the accommodation space of the gap.

20. The method of manufacturing a current detection device according to claim 19, wherein a volume of the second flange protruding from the first terminal portion is greater than or equal to 2.6 times a volume of the accommodation space of the gap.

Technical Field

The present invention relates to a current detection device and a method for manufacturing the same, and more particularly, to a current detection device and a method for manufacturing the same, which can improve processing efficiency.

Background

Current sensing devices are commonly used in a variety of electrical equipment. Generally, a current detection device includes a resistor and a pair of electrodes. The resistor is a plate-shaped resistor made of a metal material and having a small temperature coefficient of resistance, and the electrodes are made of a metal material and have high conductivity and are connected to both ends of the resistor.

According to the prior art, the current detection device is manufactured by using a surface welding process or a surface welding process. However, this method may cause displacement of the detection terminal under the high temperature environment of the multiple welding process, resulting in a change in resistance value and a loss of detection accuracy. Another method is to coat solder on electrodes on both sides of the current sensing device and then connect to a Printed Circuit Board (PCB) by Surface Mount Technology (SMT). However, the high temperature operating conditions of multiple soldering processes can result in electrode or solder melting and resistance changes.

In current detection technology for automobile batteries, a shunt current detection method using a metal plate resistor is also used, and for example, U.S. Pat. No. US10564188B2 discloses a current detection device in which a voltage detection terminal is formed with at least one of a bent portion, an upper flange, and a lower flange, and an electrode is formed with a through hole, and after the voltage detection terminal is passed through the through hole, the voltage detection terminal is fixed to the electrode by at least one of the bent portion, the upper flange, and the lower flange. Therefore, a protruding portion for fixing the voltage detection terminal is formed on the surface of the electrode. To eliminate the protruding portion, it is necessary to additionally form a groove for receiving the bent portion, the upper flange, or the lower flange on the surface of the electrode and then press the protruding portion into the groove.

According to the technology of the aforementioned patent, it is necessary to reserve a deformation dimension at the bottom of the voltage detection terminal, and the condition that the plating layer is damaged is also considered when the deformation is carried out. In addition, the prior art has complex processing technology, and some slightly protruding parts still exist due to the process tolerance, so that the joint of the base part of the voltage detection terminal is easy to protrude out of the upper surface and the lower surface of the electrode. Further, the length of the probe portion, i.e., the upper extension length of the voltage detection terminal, is not effectively controlled within a predetermined dimension due to both the process tolerance and the tolerance of the voltage detection terminal material.

Disclosure of Invention

An object of an embodiment of the present invention is to provide a current detecting device and a method for manufacturing the same, which can improve the processing efficiency. An object of one embodiment is to provide a current detection device and a method for manufacturing the same, which can control the length of the second terminal portion protruding from the first surface more easily than the prior art.

According to an embodiment of the present invention, a current detecting device includes two conductive bodies, a resistor and two detecting points. At least one of the two conductors includes a first surface and a second surface defining at least one aperture extending from the first surface into the at least one conductor. The resistor is disposed between the two conductors. The two detection points are respectively arranged on the two conductors, and at least one detection point of the two detection points is a detection terminal which comprises a first terminal part and a second terminal part, and at least one part of the first terminal part is inserted into the hole. 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 conductor, a top end of the first flange does not protrude out of the second surface, a distance is kept between the top end of the first flange and the second surface, a gap is defined between the first flange and the second flange, and at least one 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.

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.

In one embodiment, the length of the first terminal portion is less than the thickness of the at least one conductor.

In one embodiment, the resistance or resistivity of the conductor is less than the resistance or resistivity of the resistor.

In one embodiment, the second flange does not protrude from the first surface. In one embodiment, the hole does not penetrate through the conductive body, and the top end of the first flange is embedded in the conductive body. In one embodiment, the top end of the first flange does not contact the bottom of the hole.

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 accommodating 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 accommodating space of the gap.

In one embodiment, the top end of the first flange is formed with a chamfer shaped to guide the first flange into the hole.

In one embodiment, the hardness of the at least one electrical conductor is less than the hardness of the at least one test terminal.

In one embodiment, the hole penetrates through the at least one conductor, and the top end of the first flange is exposed.

According to an 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 comprises a first surface and a second surface, the hole is defined, and the hole extends from the first surface to the inside of the at least one conductor. A detection terminal is provided, and the detection terminal comprises 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, the width of the second flange is greater than that of the first flange, the width of the second flange is greater than that of the hole, and the width of the first flange is less than or equal to that of the hole. The first terminal part is inserted into the hole, the first flange is inserted into the hole, and then at least one part of the second flange is embedded into the electric conductor so as to extrude the hole to enable the material at the edge of the hole to fill into the accommodating space of the gap.

In one embodiment, the method for manufacturing the current detection device further includes: a welding step and a cutting step. The welding step is to melt and joint the resistor body and the at least one conductor body by using a welding process. Also, the welding process includes at least one of Laser beam welding (Laser welding), Electron beam welding (Electron-beam welding), and high current welding (Spot welding). The cutting step cuts the welded resistor and the two conductors into one or more current detection devices with specific shapes.

In one embodiment, the resistance or resistivity of the conductor is less than the resistance or resistivity of the resistor.

In an embodiment, the step of inserting the first terminal into the hole includes the following steps. The rivet head is supported against the second flange and protrudes out of one side surface of the second flange. And pressing the first terminal part into the hole until the part of the rivet head protruding out of the side surface of the second flange is abutted to the first surface of the at least one electric conductor.

In one embodiment, the step of forming the hole includes: a step of not making the hole penetrate the at least one electric conductor. Furthermore, the depth of the hole is greater than the length of the first terminal portion, so that the top end of the first flange is kept at a distance from the second surface.

In one embodiment, the step of providing an electrical conductor comprises: the holes are formed such that the hole diameters of portions of the holes near the second surface are not larger than the hole diameters of portions of the holes near the first surface.

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 accommodating space of the gap. Preferably, in an embodiment, a volume of the second flange protruding from the first terminal portion is greater than or equal to 2.6 times a volume of the accommodating space of the gap.

In summary, according to an embodiment of the present invention, since the top end of the first flange is kept at a distance h1 from the second surface, the tail end of the test terminal is not deformed, and the plating layer on the test terminal is not easily damaged. Moreover, the top end of the first flange does not protrude out of the second surface, so that the second surface of the conductor is kept flat. In one embodiment, the length of the second terminal portion protruding from the first surface can be more easily controlled.

Drawings

Fig. 1A shows a schematic perspective view of a current detection device according to an embodiment of the invention.

Fig. 1B shows a schematic side view of the current detection device of the embodiment of fig. 1A.

Fig. 1C shows a schematic top view of the current detection device of the embodiment of fig. 1A.

Fig. 2 is a schematic cross-sectional view of the AA line of the current detection device of the embodiment of fig. 1A.

Fig. 3 is a flowchart illustrating a method for manufacturing a current detection device according to an embodiment of the invention.

FIG. 4A is a schematic diagram illustrating a step of a method for manufacturing the current detecting device of FIG. 2 according to the present invention.

FIG. 4B is a schematic diagram illustrating a step of a method for manufacturing the current detecting device of FIG. 2 according to the present invention.

FIG. 4C is a schematic diagram illustrating a step of a method for manufacturing the current detecting device of FIG. 2 according to the present invention.

FIG. 5A is a schematic diagram of a detection terminal according to an embodiment of the invention.

FIG. 5B is a schematic diagram of a detection terminal according to an embodiment of the invention.

FIG. 5C is a schematic diagram of a detection terminal according to an embodiment of the invention.

Fig. 5D is a schematic diagram of a detection terminal according to an embodiment of the invention.

FIG. 5E is a schematic diagram of the detecting terminal according to the embodiment of the invention.

FIG. 5F is a schematic diagram of the detection terminal according to the embodiment of the invention.

Fig. 6 shows a bottom view of a plurality of first flanges.

Fig. 7A is a schematic cross-sectional view of an AA line of a current detection device according to another embodiment of the present invention.

Fig. 7B is a schematic cross-sectional view of an AA line of a current detection device according to another embodiment of the present invention.

[ notation ] to show

100: a current detection device;

102: two detection points;

103: a resistor body;

110: an electrical conductor;

111: a first surface;

112: a second surface;

113: a hole;

114: a fixing hole;

120: a detection terminal;

121: a first terminal portion;

122: a second terminal portion;

129: a material surrounding the hole;

131: an engaging portion;

132: an engaging portion;

211: a first flange;

212: a second flange;

212 a: an upward protrusion;

212b, and (3 b): a middle protrusion;

212 c: a lower protrusion;

213: a gap;

213 a: a top surface of the accommodating space;

213 b: a bottom surface of the accommodating space;

214: a third flange;

218: chamfering;

222: a protruding portion;

310: riveting heads;

318: an inner side surface;

319: an outer side surface.

Detailed Description

In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific embodiments in which the embodiments may be practiced. The following examples have been described in sufficient detail to enable those skilled in the art to practice them. Of course, other embodiments may be utilized and structural, logical, and electrical changes may be made without departing from the embodiments described herein. The following detailed description is, therefore, not to be taken in a limiting sense, and the embodiments included therein are defined by the scope of the appended claims. The drawings illustrating embodiments of the apparatus are not to scale and, in particular, certain dimensions are for clarity of presentation and are shown exaggerated in the drawing figs.

Fig. 1A shows a schematic perspective view of a current detection device according to an embodiment of the invention. Fig. 1B shows a schematic side view of the current detection device of the embodiment of fig. 1A. Fig. 1C shows a schematic top view of the current detection device of the embodiment of fig. 1A. As shown in fig. 1A to 1C, the current detection device 100 includes two conductors 110, a resistor 103, and two detection points 102. The resistor 103 is provided between the two conductors 110. The two detection points 102 are provided on the two conductors 110, respectively, and are close to both ends of the resistor 103. The current detecting device 100 optionally includes two fixing holes 114 respectively disposed at the ends of the two conductive bodies 110, so that a fixing member (not shown), such as a screw, can pass through the fixing holes 114 to lock the current detecting device 100 on the power system (not shown). When the current detection device 100 is connected in series to a battery path of a power system, a current to be measured flows into the resistor 103 from one end of the conductor 110 and flows out from the other end of the conductor 110, a corresponding detection voltage is generated between the two detection points 102, and a current detection unit (not shown) obtains the detection voltage to detect the current value of the current to be measured, for example, 100 amperes.

In one embodiment, the resistor 103 and the two conductors 110 are bonded by fusion bonding performed by a welding process, and a bonding portion 131 and 132 are formed. The welding process is not particularly limited, and may be one or more of Laser welding (Laser beam welding), Electron beam welding (Electron-beam welding), high current welding (Spot welding), and the like.

Fig. 2 is a schematic cross-sectional view of the AA line of the current detection device of the embodiment of fig. 1A. As shown in fig. 1A and 2, at least one of the conductors 110 includes a first surface 111 and a second surface 112, and defines at least one hole 113. A hole 113 extends from the first surface 111 into the at least one electrical conductor 110. At least one of the two probing points 102 includes a probing terminal 120. The detecting 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, the second flange 212 is connected to the second terminal portion 122, and a width W2 of the second flange 212 is greater than a width W1 of the first flange 211. Preferably, the width W2 of the second flange 212 is also larger than the width Wb of the second terminal portion 122. At least a portion of the second flange 212 is embedded in the at least one electrical conductor 110. In this embodiment, the second flange 212 may be preferably configured to be embedded in the at least one conductive body 110 and not protrude from the first surface 111.

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, so that the detecting terminal 120 can enter the hole 113 smoothly, and the first flange 211 can be embedded in the conductive body 110. In one embodiment, a lower end of the first flange 211 does not protrude from the second surface 112, and the lower end of the first flange 211 is kept at a distance h1 from the second surface 112. In addition, a gap 213 is defined between the first flange 211 and the second flange 212, and a lateral width W2 of the second flange 212 is greater than a width Wh of the hole 113 for pressing the conductive body 110 to allow the peripheral material 129 of the hole 113 of the conductive body 110 to enter the gap 213, so that at least a portion of the gap 213 is filled with the material of the at least one conductive body 110.

In one embodiment, a volume V2 of the second flange 212 protruding laterally from the first terminal portion 121 is greater than or equal to a volume Vg of the accommodating 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 accommodating space of the gap 213. Preferably, as shown in fig. 2, 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 accommodating space of the gap 213. As shown in fig. 4A, the volume Vg of the gap 213 is the volume between the top surface 213a of the accommodating space, i.e. the surface of the first flange 211 extending from the outermost side to the second flange 212, and the bottom surface 213b of the accommodating space. In one embodiment, the hardness of the detecting terminal 120 is preferably greater than the hardness of the conductive body 110, so that the conductive body 110 can be more advantageously pressed.

In one embodiment, as shown in FIG. 2, a space is formed between the top of the first flange 211 and the bottom of the hole 113, i.e., the bottom of the first flange 211 does not contact the bottom of the hole 113. Alternatively, it is preferable that the depth h2 of the hole 113 is greater than the length L1 of the first terminal portion 121. According to the above feature, it is further ensured that the second flange 212 does not protrude from the first surface 111, and a length T1 (described later) of the second terminal portion 122 protruding from the first surface 111 can be easily controlled.

In one embodiment, the hole 113 can be a through hole penetrating through the first surface 111 and the second surface 112 of the conductive body 110, in this embodiment, the lower top end of the first flange 211 can be exposed to the second surface 112. However, from the viewpoint of maintaining the flatness of the second surface 112, it is preferable that the hole 113 is a blind hole, and more specifically, the hole 113 does not penetrate through the conductive body 110, and the lower top end of the first flange 211 is embedded in the hole 113 of the conductive body 110, and the second surface 112 is not exposed.

Referring to fig. 2 again, the lateral pushing force Fh of a single detecting terminal of the present invention can have a endurance exceeding 200 newtons (newtons), and the pulling force Fl of a single detecting terminal can have a endurance exceeding 400 newtons. The detection terminal can be prevented from being completed or reduced in a high-temperature environment of a multi-time welding process, so that the displacement and resistance change of the detection terminal can not be caused. In addition, in one embodiment, the resistance or resistivity of the conductive body 110 is smaller than the resistance or resistivity of the resistive body 103. Preferably, the resistance or resistivity of the conductor 110 is less than 10 times or more the resistance or resistivity of the resistor 103. The resistivity is a resistance value of a certain substance per unit length and per unit cross section, and more specifically, a numerical value of the resistivity may be a value equal to a resistance value of the certain substance per unit length and per unit cross section of one square meter. The conductor 110 may be made of copper, aluminum or a combination thereof, the resistor 103 may be made of copper-manganese-tin alloy, copper-manganese-nickel alloy, nickel-chromium-aluminum-silicon alloy or a combination thereof, and the detection terminal 120 may be made of red copper, brass, phosphor bronze, metallurgical aluminum, chromium-zirconium-copper (CrZrCu), beryllium copper, stainless steel or a combination thereof.

Fig. 3 is a flowchart illustrating a method for manufacturing a current detection device according to an embodiment of the invention. FIG. 4A is a schematic diagram illustrating a step of a method for manufacturing the current detecting device of FIG. 2 according to the present invention. FIG. 4B is a schematic diagram illustrating a step of a method for manufacturing the current detecting device of FIG. 2 according to the present invention. FIG. 4C is a schematic diagram illustrating a step of a method for manufacturing the current detecting device of FIG. 2 according to the present invention.

As shown in fig. 3 and fig. 4A to 4C, a method for manufacturing a current detection device 100 according to an embodiment of the present invention includes the following steps.

Step S02: two conductors 110 and a resistor 103 are provided.

Step S04: the resistor 103 is soldered between the two conductors 110. Step S04 may include a welding step, which is to melt-bond the resistor and the at least one conductor 110 by a welding process. Also, the welding process includes at least one of Laser beam welding (Laser welding), Electron beam welding (Electron-beam welding), and high current welding (Spot welding).

Step S06: a hole 113 is formed in at least one of the two conductors 110. As shown in fig. 4A, the at least one conductive body 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 conductive body 110. In one embodiment, the aperture of the portion of the hole 113 near the second surface 112 is not larger than the aperture of the portion of the hole 113 near the first surface 111. From the viewpoint of processing convenience, it is preferable that the pore diameter of each part of the pores 113 is substantially the same. Compared with the prior art, the hole is formed without considering the external shape of the detection terminal, and the requirement for the precision of the hole 113 processing is low.

Step S08: a detection terminal 120 is provided, and 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, a width W2 of the second flange 212 is greater than a width W1 of the first flange 211, a width W2 of the second flange 212 is greater than a width Wh of the hole 113, and a width W1 of the first flange 211 is less than or equal to the width Wh of the hole 113.

Step S10: as shown in fig. 4B, 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. 4C, at least a portion of the second flange 212 is embedded into the conductive body 110 to press the hole 113, so that the material 129 around the hole fills the space of the gap 213. Preferably, the hardness of the detection terminal 120 is greater than that of the conductive body 110, so that the conductive body 110 can be pressed more advantageously.

In an embodiment, the width W2 of the second flange 212 is greater than the width Wb of the second terminal portion 122, in step S10, the second terminal portion 122 of the detecting terminal 120 is clamped by a head of a riveting hammer (not shown) 310 of a riveting machine (not shown), and as shown in fig. 4A, when the bottom surface of the riveting hammer 310 abuts against the upper top surface of the second flange 212, a side edge of the riveting hammer 310 protrudes from at least one side edge of the second flange 212. As shown in fig. 4B, the riveting machine controls the rivet head 310 to move downward to press the first terminal portion 121 into the hole 113 until the portion of the rivet head 310 protruding out of the side surface of the second flange 212 abuts against the first surface 111 of the at least one conductive body 110 (as shown in fig. 2). At this time, the lower tip of the first flange 211 is still kept at a distance h1 from the second surface 112 and does not protrude from the second surface 112, so that excessive resistance is not encountered when the rivet head 310 moves downward, and thus, the second flange 212 is ensured not to protrude from the first surface 111, and the protruding length T1 of the second terminal portion 122 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 end of the first flange 211 is not resisted by the conductor 110, and the second flange 212 can enter the conductor 110 more smoothly.

As described above, when the rivet head 310 abuts against the first surface 111 of the conductive body 110, the rivet feels a large resistance force and stops applying the pressure. Thus, the depth of the first terminal portion 121 entering the conductive body 110 can be controlled by sensing and controlling the magnitude of the pressure. Therefore, the height T1 at which the second terminal portion 122 of the detection terminal 120 protrudes from the first surface 111 can be easily controlled. According to the technology of the above-mentioned prior art patent, the bottom end of the detection terminal needs to be deformed, and compared with this, the present embodiment does not need to deform the bottom end of the detection terminal 120, so that the shape of the detection terminal 120 can be substantially maintained fixed, and only a part of the second flange 212 is slightly deformed by being pressed. Since the detection terminal 120 does not need to be deformed, the plating layer thereof is not easily damaged, and thus, the detection terminal has better electrical performance. In addition, the needling and riveting processes are performed in the same direction, and it is not necessary to needle the front surface of the electrode and form the bent portion by processing the detection terminal on the back surface thereof as in the prior art, so the manufacturing method of the embodiment has high processing efficiency.

Step S12: the cutting step is to cut the welded resistor 103 and the two conductors 110 into one or more specific shapes of the current detection device 100. Further, the current detection device 100 was produced. The cutting step S12 may be performed before the step S04 of mounting the test terminals 120, or after the step S04 of mounting the test terminals 120. In some examples, the cutting step S12 further includes forming a fixing hole 114 for at least one of the conductors 100.

FIG. 5A is a schematic diagram of a detection terminal according to an embodiment of the invention. As shown in FIG. 5A, the lower top end of the first flange 211 is formed with a chamfer 218 shaped to guide the first flange 211 into the hole 113. Preferably, the lower top end of the second flange 212 is also formed with a chamfer 219, the chamfer 219 being an inclined surface shaped to guide the second flange 212 into the conductive body 110. In addition, the chamfer 219 is formed to make the bottom of the side edge of the second flange 212 more evenly stressed and less prone to deformation caused by squeezing.

FIG. 5B is a schematic diagram of a detection terminal according to an embodiment of the invention. As shown in fig. 5B, in an embodiment, the first flange 211 may be disposed on only one side of the detection terminal 120. FIG. 5C is a schematic diagram of a detection terminal according to an embodiment of the invention. As shown in FIG. 5C, in one embodiment, first flange 211 is formed in a downward trapezoidal shape (Trapezoid). Fig. 5D is a schematic diagram of a detection terminal according to an embodiment of the invention. In one embodiment, as shown in fig. 5D, the gap 213 has a curved surface between the first flange 211 and the second flange 212. FIG. 5E is a schematic diagram of the detecting terminal according to the embodiment of the invention. As shown in fig. 5E, the first terminal portion 121 further includes a third flange 214. The third rib 214 is located between the first rib 211 and the second rib 212, is formed in the gap 213, and has a protruding width of the second rib 212 greater than that of the first rib 211 and the third rib 214, respectively, with respect to a side surface of the second terminal portion 122. The protruding width of the first flange 211 is greater than that of the third flange 214. FIG. 5F is a schematic diagram of the detection terminal according to the embodiment of the invention. As shown in fig. 5F, the second flange 212 includes an upper protrusion 212a, a middle protrusion 212b and a lower protrusion 212 c. The middle protrusion 212b is located between the upper protrusion 212a and the lower protrusion 212 c. The protruding width of the middle protrusion 212b is greater than the protruding width of the upper protrusion 212a and the lower protrusion 212c, respectively, and the protruding width of the lower protrusion 212c is greater than the protruding width of the upper protrusion 212a, with respect to the side surface of the second terminal portion 122. It should be noted that the embodiment of fig. 5B to 5F is similar to the embodiment of fig. 5A, and therefore, in the above description, the same elements are denoted by the same reference numerals and the related description thereof is omitted.

It should be noted that the present invention is not limited to the shape of the first flange 211. Fig. 6 shows a bottom view of the plurality of first flanges 211 and shows the shape of the bottom surface of the first flanges 211 of various embodiments. Referring to fig. 6, the bottom surface of the first flange 211 may be oval as shown in (a), circular as shown in (b), rectangular as shown in (c), hexagonal as shown in (d), or the like.

According to an embodiment of the invention, since the length L1 of the first terminal portion 121 is smaller than the thickness D1 of the conductive body 110, when the first terminal portion 121 is pushed into the conductive body 110, the distance h1 between the lower end of the first flange 211 and the second surface 112 can be utilized to absorb tolerance and easily control the protruding length T1 of the second terminal portion 122 from the first surface 111. Furthermore, if the tolerance of the raw material is too large, that is, the length L1 of the first terminal portion 121 is too long, the distance h1 between the lower end of the first flange 211 and the second surface 112 can be used to prevent the lower end of the first flange 211 from protruding from the second surface 112 or prevent the upper end of the second flange 212 from protruding from the first surface 111.

Fig. 7A is a schematic cross-sectional view of an AA line of a current detection device according to another embodiment of the present invention. In another embodiment, as shown in fig. 7A, the bottom surface of the rivet head 310 is a stepped surface and includes an inner surface 318 and an outer surface 319, the inner surface 318 is used for abutting against the top surface of the second flange 212, and the outer surface 319 is used for abutting against the first surface 111. In this embodiment, the inside surface 318 of the bottom surface of the rivet head 310 protrudes beyond the outside 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 abuts against the upper top surface of the second flange 212, so that the second flange 212 is selectively pushed into the conductor 110 completely, 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, and reducing the tolerance of the length T1, that is, meeting the predetermined specification. Fig. 7B is a schematic cross-sectional view of an AA line of a current detection device according to another embodiment of the present invention. The embodiment of fig. 7B is similar to the embodiment of fig. 7A, and therefore, in the following description, like elements are given like reference numerals and their related descriptions are omitted. As shown in fig. 7B, unlike the embodiment of fig. 7A, the outer surface 319 of the bottom surface of the rivet head 310 may also protrude from the inner surface 318 of the bottom surface of the rivet head 310 according to the product design.

As described above, according to an embodiment of the present invention, since the lower tip of the first flange 211 is kept at the distance h1 from the second surface 112, the detection terminal 120 does not need to be deformed on the second surface 112 side to form a flange or a bent portion, the plating layer on the detection terminal 120 is not easily damaged, and the service life of the rivet 310 is long. Furthermore, in an embodiment of the present invention, since the thickness of the deformation of the detection terminal 120 is not reserved, the thickness of the conductive body 110 may be smaller, for example, when the width of the detection terminal 120 is 1mm, the minimum thickness of the conductive body 110 may be 1.7mm, and the minimum width of the second flange 212 may be 2 mm; for example, when the width of the detection terminal 120 is 3mm, the width of the second flange 212 may be 5mm at the minimum, and the thickness of the conductive body 110 may be 2.0mm at the minimum. Moreover, the lower end of the first flange 211 does not protrude from the second surface 112, so that the second surface 112 can be easily kept flat without an additional processing procedure. In one embodiment, the length T1 of the second terminal portion 122 protruding from the first surface 111 can be more easily controlled. The lateral pushing force Fh of a single detection terminal can exceed 200 newtons, and the pulling force Fl of the other single detection terminal can exceed 400 newtons. The detection terminal can be prevented from being completed or reduced in a high-temperature environment of a multi-time welding process, so that the displacement and resistance change of the detection terminal can not be caused.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.