Current detection device and sensor

Abstract

The utility model relates to a current detection device and a sensor, and the device comprises a first housing which is provided with an accommodation groove, and the accommodation groove comprises a first step, a second step, and a first positioning hole, the terminal is embedded in the second step, a second positioning hole is formed in the terminal, and the second positioning hole is communicated with the first positioning hole; the detection mechanism comprises a second shell and a positioning part, the second shell is embedded in the first step and abuts against the surface of the terminal, and the positioning part is connected to the second shell and embedded in the second positioning hole and the first positioning hole. According to the current detection device and the sensor provided by the invention, the terminal is embedded in the second step of the accommodating groove, the second shell is embedded in the first step, and the positioning part is embedded in the second positioning hole and the first positioning hole, so that the detection mechanism is not easy to move relative to the terminal; therefore, the stability of internal structures of the current detection device and the sensor is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of current detection, and in particular to a current detection device and a sensor. Background Art

[0002] Current sensors are widely used in monitoring electronic equipment, such as new energy vehicle motor control systems, battery management systems, industrial control systems, etc. With the development of technology, more requirements are put forward for current sensors, among which the stability of the internal connection structure of the current sensor is particularly important.

[0003] The detection mechanism is easy to move relative to the terminal, resulting in an unstable internal connection structure of the sensor. Utility Model Content

[0004] The present disclosure provides a current detection device and a sensor to at least solve the above technical problems existing in the prior art.

[0005] According to a first aspect of the present disclosure, a current detection device is provided, comprising: a first shell body, formed with a receiving groove, the receiving groove comprising a first step, a second step and a first positioning hole connected in sequence; a terminal, embedded in the second step, the terminal having a second positioning hole, the second positioning hole being connected to the first positioning hole; a detection mechanism, comprising a second shell body and a positioning portion, the second shell body being embedded in the first step and abutting against the terminal surface, the positioning portion being connected to the second shell body and embedded in the second positioning hole and the first positioning hole.

[0006] In one possible implementation manner, the first step is provided with a penetration member; the second shell is provided with a through hole; and the penetration member is penetrated in the through hole.

[0007] In one possible implementation manner, the first shell includes a clamping member, and the clamping member is an elastic clamping member. The clamping member is disposed in the accommodating groove and is clamped on the second shell.

[0008] In one possible implementation manner, the clamping member is formed with a first guide portion;

[0009] The second shell is formed with a second guide portion, and the second guide portion is used to cooperate with the first guide portion.

[0010] In one possible implementation manner, the accommodating groove is formed with a positioning protrusion;

[0011] The second housing forms a positioning groove;

[0012] The positioning protrusion is embedded in the positioning groove.

[0013] In one possible implementation manner, the current detection device further includes: a glue layer connected to the first step and the terminal, and connected to the bottom of the second shell.

[0014] In one possible implementation manner, the detection mechanism includes a magnetic field detection component, and the magnetic field detection component is embedded in the positioning portion, and two ends of the magnetic field detection component are symmetrical with respect to the second positioning hole.

[0015] In one possible implementation manner, the detection mechanism further includes a signal pin and an adapter plate;

[0016] The signal pin is embedded in the second housing;

[0017] The adapter plate is embedded in the second shell and connected to the signal pin and the magnetic field detection element.

[0018] In one possible implementation manner, the signal pin includes a first connecting portion and a second connecting portion, the first connecting portion is adjacent to the positioning portion, and the second connecting portion protrudes from the second housing and is used to connect to an external device;

[0019] The adapter plate is connected to the first connecting portion.

[0020] In one possible implementation manner, the second housing is provided with a guide column, wherein the guide column is parallel to the second connection portion of the signal pin and is used to guide the external device to connect to the second connection portion.

[0021] According to a second aspect of the present disclosure, a current sensor is provided, characterized by comprising any one of the current detection devices in the above-mentioned embodiments.

[0022] In one possible implementation manner, there are multiple current detection devices, and the multiple current detection devices are connected in sequence.

[0023] The present disclosure provides a current detection device and a sensor, which are provided with a receiving groove, the receiving groove having a first step, a second step and a first positioning hole, and a detection mechanism, the detection mechanism including a second shell and a positioning portion. The terminal is embedded in the second step of the receiving groove, the second shell is embedded in the first step, and the positioning portion is embedded in the second positioning hole and the first positioning hole. The detection mechanism is pressed on the terminal, so that the detection mechanism is not easy to move relative to the terminal, thereby improving the stability of the internal structure of the current detection device and the sensor.

[0024] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:

[0026] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0027] Figure 1 An exploded diagram of a current detection device and a current detection device in a sensor according to an embodiment of the present disclosure is shown;

[0028] Figure 2 A cross-sectional view of a current detection device and a second housing in a sensor according to an embodiment of the present disclosure is shown;

[0029] Figure 3 A schematic diagram of the overall structure of a current detection device and a sensor according to an embodiment of the present disclosure is shown;

[0030] Figure 4 A cross-sectional view of a first housing in a current detection device and a sensor according to an embodiment of the present disclosure is shown;

[0031] Figure 5 A schematic diagram of the structure of a current detection device and a detection mechanism in a sensor according to an embodiment of the present disclosure is shown;

[0032] Figure 6 A cross-sectional view of a glue layer in a current detection device and a sensor according to an embodiment of the present disclosure is shown;

[0033] Figure 7 A schematic diagram of the connection structure of a signal pin, an adapter board and a magnetic field detection component in a current detection device and a sensor according to an embodiment of the present disclosure is shown;

[0034] Figure 8 A schematic diagram of the overall structure of a current detection device and a current sensor in a sensor according to an embodiment of the present disclosure is shown.

[0035] Explanation of the numbers in the figure: 1. first shell; 11. accommodating groove; 111. first step; 1111. penetration member; 112. second step; 113. first positioning hole; 114. snap-fit ​​member; 1141. first guide portion; 115. positioning protrusion; 2. terminal; 21. second positioning hole; 3. detection mechanism; 31. second shell; 311. second guide portion; 312. positioning groove; 313. perforation; 32. positioning portion; 321. magnetic field detection member; 322. signal needle; 3221. first connecting portion; 3222. second connecting portion; 323. adapter plate; 33. guide column; 4. adhesive layer; 5. current sensor. DETAILED DESCRIPTION

[0036] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0037] like Figure 1 As shown, in the first aspect of the present disclosure, a current detection device is provided, including: a first shell 1, formed with a receiving groove 11, the receiving groove 11 includes a first step 111, a second step 112 and a first positioning hole 113 connected in sequence; a terminal 2, embedded in the second step 112, the terminal 2 is provided with a second positioning hole 21, and the second positioning hole 21 is connected to the first positioning hole 113; a detection mechanism 3, including a second shell 31 and a positioning portion 32, the second shell 31 is embedded in the first step 111 and abuts against the surface of the terminal 2, the positioning portion 32 is connected to the second shell 31, and is embedded in the second positioning hole 21 and the first positioning hole 113.

[0038] The height of the second step 112 is the same as that of the terminal 2 , and the upper surface of the terminal 2 is flush with the first step 111 .

[0039] The second positioning hole 21 is connected to the first positioning hole 113 . Specifically, the first positioning hole 113 and the second positioning hole 21 have the same center line. The positioning portion 32 is embedded in the middle position of the second positioning hole 21 and the first positioning hole 113 along the center line direction of the first positioning hole 113 and the second positioning hole 21 .

[0040] Two ends of the second positioning hole 21 are symmetrical with respect to the long axis of the terminal 2 to ensure the detection accuracy of the current detection device.

[0041] The second housing 31 and the positioning portion 32 are integrally formed by injection molding.

[0042] In this way, the terminal 2 is embedded in the second step 112 of the accommodating groove 11, the second shell 31 of the detection mechanism 3 is embedded in the first step 111 and pressed on the terminal 2, and the positioning portion 32 is embedded in the second positioning hole 21 and the first positioning hole 113, so that the detection mechanism 3 is not easy to move relative to the terminal 2, thereby improving the stability of the internal structure of the current detection device.

[0043] like Figure 2 As shown, in one embodiment, the first step 111 is provided with a penetration member 1111 ; the second shell 31 is provided with a through hole 313 ; and the penetration member 1111 is penetrated in the through hole 313 .

[0044] The penetration member 313 is specifically a pin, which is injection-molded as one piece with the first step 111 and is located on a surface of the first step 111 facing the second shell 31. A through hole 313 is provided at the bottom of the second shell 31 at a position corresponding to the pin, and the pin is penetrated in the through hole 313, thereby fixing the second shell 31 on the first step 11.

[0045] like Figure 3 and 4 As shown, in one embodiment, the first shell 1 includes a clamping member 114 , which is an elastic clamping member. The clamping member 114 is disposed in the receiving groove 11 and is clamped on the second shell 31 .

[0046] The clamping member 114 is made of an elastic material, such as a plastic material.

[0047] The clip 114 is an L-shaped clip, which is injection molded as one piece with the first shell 1. One end of the L-shaped clip is injection molded on the first step 111 of the accommodating groove 11, and the other end is clamped on the upper surface of the second shell 31 to fix the second shell 31 in the accommodating groove 11 so that the second shell 31 is not easily moved relative to the accommodating groove 11.

[0048] like Figures 3 to 5 As shown, in one possible implementation, the clamping member 114 is formed with a first guide portion 1141;

[0049] The second housing 31 is formed with a second guide portion 311 , and the second guide portion 311 is used to cooperate with the first guide portion 114 .

[0050] The first guide portion 1141 is a first inclined surface, which is inclined from top to bottom toward the bottom of the receiving groove 11 . The first inclined surface is an upper surface of the clamping member 114 .

[0051] A flange is formed at the edge of the second shell 31, and the flange corresponds to the position of the clamping piece 114. A second guide portion 311 is formed at the position of the flange corresponding to the first guide portion 1141. The second guide portion 311 is a second inclined surface tangent to the first inclined surface, and the second inclined surface is the lower surface of the flange.

[0052] When the detection mechanism 3 is installed into the receiving groove 11 , the second inclined surface moves downward along the first inclined surface and gradually moves away from the first inclined surface under the guidance of the first inclined surface. Due to the elasticity of the clamping member 114 , the clamping member 114 is clamped to the upper surface of the flange.

[0053] like Figure 4 and 5 As shown, in one embodiment, the receiving groove 11 is formed with a positioning protrusion 115 ; the second housing 31 is formed with a positioning groove 312 ; and the positioning protrusion 115 is embedded in the positioning groove 312 .

[0054] The positioning protrusion 115 is raised relative to the inner wall of the receiving groove 11 , and the positioning groove 312 matches the positioning protrusion 115 , so that the positioning protrusion 115 is embedded in the positioning groove 312 , thereby realizing the positioning of the detection mechanism 3 .

[0055] In a specific implementation scenario, the positioning protrusion 115 is specifically an arc-shaped protrusion, there are two arc-shaped protrusions, the two arc-shaped protrusions are opposite to each other, and protrude toward the inside of the accommodating groove 11. The positioning groove 312 is specifically an arc-shaped side wall, there are two arc-shaped side walls, and the two arc-shaped protrusions are embedded in the two arc-shaped side walls one by one.

[0056] In this way, a positioning protrusion 115 is set in the accommodating groove 11, and the positioning protrusion 115 is used to position the detection mechanism 3. The second shell 31 of the detection mechanism 3 is set with a positioning groove 312 matching the positioning protrusion 115, so that the positioning protrusion 115 is embedded in the positioning groove 312, thereby improving the stability of the connection structure between the detection mechanism 3 and the accommodating groove 11.

[0057] like Figure 6 As shown, in one embodiment, the current detection device further includes: an adhesive layer 5 connected to the first step 111 and the terminal 2 , and connected to the bottom of the second housing 31 .

[0058] The adhesive layer 5 is an epoxy resin potting adhesive layer, which is bonded to the surface of the first step 111 and the terminal 2 having the same horizontal plane, and is bonded to the bottom of the second shell 31, so that the second shell 31 is fixed in the accommodating groove 11 through the epoxy resin potting adhesive layer, thereby increasing the stability of the connection structure between the detection mechanism 3 and the accommodating groove 11.

[0059] In one embodiment, the detection mechanism 3 includes a magnetic field detection member 321 . The magnetic field detection member 321 is embedded in the positioning portion 32 . Two ends of the magnetic field detection member 321 are symmetrical with respect to the second positioning hole 21 .

[0060] The magnetic field detection component 321 is specifically a magnetic field detection chip, which has two mutually symmetrical magnetic field sensing points. The two magnetic field sensing points are used to detect the magnetic field at two points on the surface of the terminal 2. The two ends of the magnetic field detection chip are symmetrical relative to the second positioning hole 21, and thus the two magnetic field sensing points of the magnetic field detection chip are symmetrical relative to the second positioning hole 21.

[0061] In this way, according to the differential principle, the magnetic field detection chip is not easily disturbed by the external magnetic field and affects the detection results of the two magnetic field sensing points.

[0062] like Figure 7 As shown, in one embodiment, the detection mechanism 3 also includes a signal needle 322 and an adapter plate 323; the signal needle 322 is embedded in the second shell 31; the adapter plate 323 is embedded in the second shell 31 and connected to the signal needle 322 and the magnetic field detection element 321.

[0063] There are multiple signal pins 322, which are injection molded in the second housing 31 to increase the efficiency of signal transmission. Specifically, there are two groups of signal pins 322, two groups of L-shaped signal pins 322 are arranged in parallel, and one group of three, three L-shaped signal pins 322 are arranged in parallel.

[0064] The upper portion of the adapter plate 323 is embedded in the second housing 31 and connected to the signal pin 322 , and the lower portion is embedded in the positioning portion 32 . The magnetic field detection element 321 is welded to the lower portion of the adapter plate 323 .

[0065] like Figure 5 and 6 As shown, in one embodiment, the second shell 31 is provided with a guide column 33 , and the guide column 33 is parallel to the second connection portion 3222 of the signal pin 322 , and is used to guide the external device to connect to the second connection portion 3222 .

[0066] The guide post 33 is integrally formed with the second housing 31 and is located on the upper surface of the second housing 31 and parallel to the second connection portion 3222 of the signal pin 322. The guide post 33 is used to connect to an external device and guide the external device to accurately connect to the second connection portion 3222 of the signal pin 322.

[0067] In one embodiment, the signal pin 322 includes a first connection portion 3221 and a second connection portion 3222 , wherein the first connection portion 3221 is adjacent to the positioning portion 32 , and the second connection portion 3222 protrudes from the second shell 31 for connecting to an external device; the adapter board 323 is connected to the first connection portion 3221 .

[0068] The signal pin 322 is an L-shaped signal pin 322, which is injection molded in the second shell 31. The first connecting portion 3221 of the L-shaped signal pin 322 is located above the positioning portion 32, and the second connecting portion 3222 of the L-shaped signal pin 322 protrudes from the upper surface of the mounting seat for connection with an external device. The detection signal of the magnetic field detection element 321 is sent to the external device through the signal pin 322.

[0069] The adapter plate 323 is welded to the first connection portion 3221 , and the magnetic field detection element 321 is welded to the connection plate by a surface mounting process.

[0070] like Figure 8 As shown, in a second aspect of the present disclosure, a current sensor 5 is provided, comprising any one of the current detection devices in the above-mentioned embodiments.

[0071] In one possible implementation manner, there are multiple current detection devices, and the multiple current detection devices are connected in sequence.

[0072] In a specific embodiment, the current sensor 5 of the present disclosure includes three current detection devices, which are connected in sequence to detect three-phase electricity.

[0073] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of this disclosure can be achieved, and this document is not limited here.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0075] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A current detection device, characterized in that: include: A first housing is formed with a receiving groove, wherein the receiving groove includes a first step, a second step and a first positioning hole which are connected in sequence; A terminal is embedded in the second step, the terminal is provided with a second positioning hole, and the second positioning hole is connected to the first positioning hole; The detection mechanism comprises a second shell and a positioning portion, wherein the second shell is embedded in the first step and abuts against the terminal surface, and the positioning portion is connected to the second shell and embedded in the second positioning hole and the first positioning hole.

2. The current detection device according to claim 1, characterized in that: The first step is provided with a penetration member; The second shell is provided with a through hole; The penetration member is penetrated in the penetration hole.

3. The current detection device according to claim 1, characterized in that: The first shell includes a clamping member, which is an elastic clamping member. The clamping member is arranged in the accommodating groove and is clamped on the second shell.

4. The current detection device according to claim 3, characterized in that: The clamping member is formed with a first guide portion; The second shell is formed with a second guide portion, and the second guide portion is used to cooperate with the first guide portion.

5. The current detection device according to claim 1, characterized in that: The accommodating groove is formed with a positioning protrusion; The second housing forms a positioning groove; The positioning protrusion is embedded in the positioning groove.

6. The current detection device according to claim 1, characterized in that: The current detection device also includes: An adhesive layer is connected to the first step and the terminal, and is connected to the bottom of the second shell.

7. The current detection device according to claim 1, characterized in that: The detection mechanism comprises a magnetic field detection component, which is embedded in the positioning portion, and two ends of the magnetic field detection component are symmetrical with respect to the second positioning hole.

8. The current detection device according to claim 7, characterized in that: The detection mechanism also includes a signal pin and an adapter plate; The signal pin is embedded in the second housing; The adapter plate is embedded in the second shell and connected to the signal pin and the magnetic field detection element.

9. The current detection device according to claim 8, characterized in that: The signal pin comprises a first connecting portion and a second connecting portion, wherein the first connecting portion is adjacent to the positioning portion, and the second connecting portion protrudes from the second housing and is used for connecting to an external device; The adapter plate is connected to the first connecting portion.

10. The current detection device according to claim 9, characterized in that: The second housing is provided with a guide column, which is parallel to the second connecting portion of the signal pin and is used to guide the external device to connect to the second connecting portion.

11. A current sensor, characterized in that: The invention comprises the current detection device according to any one of claims 1 to 8.

12. The current sensor according to claim 11, characterized in that: The current detection device comprises a plurality of current detection devices, and the plurality of current detection devices are connected in sequence.

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