Fluxgate current sensor mounting rack

Abstract

The utility model provides a fluxgate current sensor mounting rack, and belongs to the field of current measuring devices. The fluxgate current sensor mounting frame comprises a fixing support, the fixing support comprises a vertical frame body and a bottom frame body located at the bottom of the vertical frame body, the vertical frame body comprises two mounting parts arranged at intervals in the transverse direction and a connecting part located between the bottom ends of the two mounting parts, and the fluxgate current sensor mounting frame further comprises a shielding piece. The shielding piece comprises at least one end plate and at least one side plate which is perpendicular to the end plate and integrally or fixedly connected with the end plate, the end plate is located on one longitudinal side of the vertical frame body, and at least one side plate is fixedly connected with one connecting part. According to the utility model, the shielding member is arranged on the fixed support, and the fluxgate current sensor and the electromagnetic interference source are separated by using the shielding member, so that the influence of a surrounding interference magnetic field on the data acquisition precision of the fluxgate current sensor is reduced, and the safety of a battery system is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of current measuring devices, in particular to a fluxgate current sensor mounting bracket. Background Art

[0002] The fluxgate current sensor uses the principle of electromagnetic induction to indirectly measure the current in the circuit. It has the characteristics of high precision, high sensitivity, and high safety due to non-contact with the measured circuit. Therefore, it is widely used in new energy vehicles.

[0003] The fluxgate current sensor needs to be equipped with a special mounting bracket for installation on new energy vehicles. For example, a current sensor mounting bracket is disclosed in a Chinese utility model patent with authorization announcement number CN220983349U and authorization announcement date of May 17, 2024. The mounting bracket includes a vertical plate (i.e., a vertical frame body) and a positioning plate (i.e., a bottom frame body). The positioning plate is perpendicular to the vertical plate and is provided with a positioning hole for fixing it to the vehicle by bolts. The vertical plate has two upwardly extending mounting portions, and a connecting portion for connecting the two mounting portions is provided between the bottom ends of the two mounting portions, so that the vertical plate is U-shaped as a whole. Nuts are provided on the mounting portions on both sides of the vertical plate to facilitate the use of bolts to fix the fluxgate current sensor to the mounting bracket. After installation, the fluxgate current sensor is located between the two mounting portions of the vertical plate.

[0004] The fluxgate current sensor is easily interfered by other magnetic fields in the surrounding area. Especially as the battery system of new energy vehicles gradually develops towards large capacity and high integration, the magnetic field of the battery system has become more complex and changeable, which has a great impact on the data acquisition accuracy of the fluxgate current sensor. The decline in current acquisition accuracy will directly affect the SOC estimation of the battery system, thereby indirectly affecting the life and safety of the battery system. Utility Model Content

[0005] The purpose of the utility model is to provide a fluxgate current sensor mounting bracket to solve the technical problem in the prior art that the fluxgate current sensor is easily disturbed by the surrounding magnetic field and has low acquisition accuracy.

[0006] To achieve the above-mentioned purpose, the technical solution of the fluxgate current sensor mounting bracket provided by the present invention is:

[0007] A fluxgate current sensor includes a fixed bracket, which includes a vertical frame body and a bottom frame body located at the bottom of the vertical frame body. The vertical frame body includes two mounting parts arranged at intervals along the transverse direction and a connecting part located between the bottom ends of the two mounting parts. The area surrounded by the mounting parts and the connecting part is an installation space for installing the fluxgate current sensor. The fluxgate current sensor mounting bracket also includes a shielding member for separating the fluxgate current sensor from an electromagnetic interference source. The shielding member includes at least one end plate and at least one side plate perpendicular to the end plate and integrally or fixedly connected. The end plate is located on one longitudinal side of the vertical frame body. A through hole or a through slot for the measured wire to pass through is provided on the end plate. At least one side plate is fixedly connected to one of the connecting parts.

[0008] As a further improvement, the shielding member is provided with an end plate only at one end in the longitudinal direction, and the other end in the longitudinal direction of the shielding member is an open structure without an end plate.

[0009] As a further improvement, one end of the shielding member in the transverse direction is fixedly connected to one of the connecting portions, and the other end of the shielding member in the transverse direction is an open structure without a side panel.

[0010] As a further improvement, one end of the shielding member in the transverse direction is fixedly connected to one of the connecting portions, and the other end of the shielding member in the transverse direction is an open structure without a side panel.

[0011] As a further improvement, a lateral dimension of the shielding member is smaller than a distance between the two mounting portions.

[0012] As a further improvement, an end surface of the shielding member that is not provided with a side plate in the transverse direction is coplanar with the central plane, and the central plane is perpendicular to the transverse direction and has an equal distance from the two mounting portions.

[0013] As a further improvement, at least two side panels are provided, each side panel is integrally connected to an end panel and vertically bent, and adjacent side panels are welded and fixed.

[0014] As a further improvement, the side panels and the end panels are both flat plates.

[0015] As a further improvement, the mounting portion for connecting with the shielding member is provided with a recess for embedding the corresponding side plate on the shielding member, and the depth of the recess is greater than or equal to the thickness of the corresponding side plate.

[0016] As a further improvement, the base frame body includes two mounting plates integrally connected to the upright frame body and vertically bent, and the bending directions of the two mounting plates are opposite.

[0017] The fluxgate current sensor mounting bracket provided by the present invention is an improvement over the prior art. The fluxgate current sensor mounting bracket includes a shielding member disposed on a fixed bracket. This shielding member isolates the fluxgate current sensor from electromagnetic interference sources, thereby reducing the impact of surrounding interference magnetic fields on the data acquisition accuracy of the fluxgate current sensor. This improves the accuracy of battery SOC estimation, increases battery life, improves the accuracy of vehicle range estimation, improves battery charging safety, and increases the accuracy of remaining charge time, thereby ensuring the safety of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a diagram of the use state of the fluxgate current sensor mounting bracket in Example 1 of the fluxgate current sensor mounting bracket of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the fluxgate current sensor mounting bracket in Example 1 of the fluxgate current sensor mounting bracket of the present utility model;

[0020] Figure 3 This is a structural schematic diagram of the fluxgate current sensor mounting bracket from another perspective in Example 1 of the fluxgate current sensor mounting bracket of the present utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the fluxgate current sensor mounting bracket in Example 2 of the fluxgate current sensor mounting bracket of the present utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of the fluxgate current sensor mounting bracket in Example 3 of the fluxgate current sensor mounting bracket in the present utility model.

[0023] Description of reference numerals:

[0024] 1. Fixed bracket; 11. Stand body; 111. Mounting portion; 112. Connecting portion; 113. Connecting nut; 114. Through hole; 12. Base body; 121. Mounting plate; 122. Mounting hole; 2. Shielding member; 21. End plate; 22. First side plate; 23. Second side plate; 24. Third side plate; 25. Through slot; 26. Through hole; 3. Fluxgate current sensor. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the embodiments.

[0026] Specific embodiment 1 of the fluxgate current sensor mounting bracket provided by the utility model:

[0027] A fluxgate current sensor mounting bracket, see attached Figure 1 and attached Figure 2, including a fixing bracket 1 and a shielding member 2 fixedly connected to the fixing bracket 1. The materials of the fixing bracket 1 and the shielding member 2 can be carbon steel, stainless steel or silicon steel.

[0028] The fixing bracket 1 is used to be fixedly connected to the fluxgate current sensor 3 and fixedly installed on the new energy vehicle. The fixing bracket 1 is made of a whole piece of plate through punching and bending. The fixing bracket 1 specifically includes a vertical frame body 11 and a bottom frame body 12 located at the bottom of the vertical frame body 11. The vertical frame body 11 includes two parallel mounting portions 111 and a connecting portion 112 located between the two mounting portions 111. The connecting portion 112 is located at the bottom end of the mounting portion 111. The mounting portion 111 and the connecting portion 112 are generally "U"-shaped structures. The area enclosed by the mounting portion 111 and the connecting portion 112 is the installation space for installing the fluxgate current sensor.

[0029] In the present invention, the arrangement direction of the two mounting portions 111 is horizontal, the longitudinal direction is perpendicular to the horizontal direction and also perpendicular to the height direction of the mounting portions 111 , and the longitudinal direction is in the same direction as the axial direction of the measured wire.

[0030] A circular through hole 114 is provided in the longitudinal direction of the mounting portion 111. Figure 3 A connecting nut 113 is welded to a corresponding through-hole 114 on one longitudinal side of the mounting portion 111 to facilitate bolting of the fluxgate current sensor 3 to the stand 11. The connection nut 113 is secured to the mounting portion 111 to reduce costs. In other embodiments, internal threads may be machined into the through-hole 114. Once mounted on the fixed bracket 1, the fluxgate current sensor 3 is positioned between the two mounting portions 111.

[0031] The base frame 12 includes two vertically bent mounting plates 121 integrally connected to the bottom end of the vertical frame 11. The two mounting plates 121 are bent in opposite directions, thereby providing better support for the fixed bracket 1 and effectively ensuring the stability of the fixed bracket 1. The mounting plates 121 are each provided with mounting holes 122 for the bolts used to connect to the new energy vehicle.

[0032] The shield 2 is also formed from a single piece of sheet material through punching and bending, specifically comprising an end plate 21 and three side plates. Both the end plate 21 and the side plates are flat plates, with the thickness of the end plate 21 oriented in the same direction as the longitudinal direction. End plate 21 is provided with slots 25 for the conductors under test to pass through. The thickness of each side plate is perpendicular to the longitudinal direction. Each side plate is integrally connected to the end plate 21 and vertically bent. After bending, adjacent side plates are fixed together by welding.

[0033] The three side panels are a first side panel 22, a second side panel 23, and a third side panel 24. The first side panel 22 is located at one transverse end of the end panel 21, with its thickness oriented in the transverse direction. The third side panel 24 is located at one longitudinal end of the end panel 21, away from the fixed bracket 1, with its thickness oriented in the longitudinal direction. The second side panel 23 is obliquely disposed between the first and third side panels 22, 24. The overall shape of the first, second, and third side panels 22, 23, and 24 is similar to that of the fluxgate current sensor 3. The side panels are all flat, which reduces processing costs.

[0034] The first side panel 22 is located outside one of the mounting portions 111 and is fixedly connected to the mounting portion 111 by welding. A recess is provided at the corresponding position of the mounting portion 111, and the first side panel 22 is embedded in the recess. The depth of the recess is greater than or equal to the thickness of the first side panel 22, so that the first side panel 22 does not protrude laterally from the corresponding mounting portion 111, improving the aesthetics. A stepped structure is formed between the position where the recess is provided and the position where the recess is not provided on the mounting portion 111. The stepped surface of this stepped structure can increase the contact area between the mounting portion 111 and the first side panel 22, thereby improving the connection strength.

[0035] When in use, the shielding component 2 needs to be located between the fluxgate current sensor 3 and the electromagnetic interference source. The shielding component 2 is used to separate the fluxgate current sensor 3 from the electromagnetic interference source, thereby shielding the interference magnetic field generated by the electromagnetic interference source and improving the data acquisition accuracy of the fluxgate current sensor 3.

[0036] The shielding member 2 has an open structure at both its transverse end without a side panel and its longitudinal end without an end panel 21. During use, the open structure is located on the side of the fluxgate current sensor 3 that is away from the electromagnetic interference source. In new energy commercial vehicles, especially heavy trucks and mining trucks with high operating currents, the fluxgate current sensor 3 generates significant heat, which can also affect the data acquisition accuracy of the fluxgate current sensor 3. The open structure facilitates the installation of the fluxgate current sensor 3 while maintaining heat dissipation, effectively ensuring the data acquisition accuracy of the fluxgate current sensor 3.

[0037] Based on this, the end plate 21 in the shielding member 2 does not need to extend to the mounting portion 111 that is not connected to the shielding member 2, so that the lateral dimension of the shielding member 2 is smaller than the distance between the two upright bodies 11, thereby expanding the range of heat dissipation and saving materials. In this embodiment, the end face of the shielding member 2 that is not provided with a side plate in the lateral direction is coplanar with the center plane, and the center plane is a plane perpendicular to the lateral direction and equidistant from the two mounting portions 111. In this way, heat dissipation and material savings can be maximized without affecting its shielding effect. In other embodiments, the lateral dimension of the shielding member 2 can be designed according to needs.

[0038] The fluxgate current sensor mounting bracket has a simple structure. On the one hand, it occupies a small space and has a low manufacturing cost. On the other hand, it has high stability and reliability and can be used in harsh working conditions with severe vibration such as heavy trucks and mining trucks.

[0039] In other embodiments, the fixing bracket and the shielding member can also be fixedly connected by bolts. Specifically, a connecting ear plate is vertically bent on one of the mounting bodies of the fixing bracket, the connecting ear plate is laterally fitted with the first side plate, and bolt holes for the bolts to pass through are provided on the connecting ear plate and the first side plate.

[0040] In other embodiments, the fixing bracket and the shielding member can be formed by other methods, for example, the frame body and the base frame body in the fixing bracket can be processed separately and then welded together, and the side panels and end panels in the shielding member are cut out and welded together one by one; or the side panels in the shielding member are processed by integral bending and then welded together with the end panels; or the side panels and the end panels are integrally stamped; or the fixing bracket and the shielding member can also be integrally formed by casting.

[0041] In other embodiments, the chassis body may also have three or four mounting plates, with some mounting plates having bending directions opposite to the remaining mounting plates, or all mounting plates having bending directions that are the same. In other embodiments, only one mounting plate may be provided.

[0042] In other embodiments, the chassis body may not be a mounting plate. In this embodiment, the chassis body may be configured as a screw or a buckle structure according to actual needs.

[0043] In other embodiments, the recess may not be provided on the mounting portion. In this embodiment, the first side plate is directly connected to the end wall in the lateral direction of the mounting portion.

[0044] In other embodiments, the second side plate and the third side plate may both be arc-shaped plates, whose shapes are more similar to the appearance of the current sensor.

[0045] Specific embodiment 2 of the fluxgate current sensor mounting bracket provided by the utility model:

[0046] This embodiment is based on embodiment 1, and the difference from embodiment 1 is that, see attached Figure 4 In this embodiment, the shielding member 2 is fixedly connected to both mounting portions 111. The area of ​​the end plate 21 of the shielding member 2 is twice that of the end plate 21 in the first embodiment. Side panels are provided at both ends of the end plate 21 in the transverse direction and at the end of the end plate 21 away from the fixed bracket 1. In this embodiment, a through hole 26 is defined in the end plate 21 for the conductor under test to pass through.

[0047] In this embodiment, the shielding member 2 has no end plate 21 at one longitudinal end, but forms an open structure. The fluxgate current sensor 3 can dissipate heat through the open structure.

[0048] Compared with Example 1, under high current conditions, after the fluxgate current sensor mounting bracket in this embodiment is used, the data acquisition accuracy of the corresponding fluxgate current sensor 3 is slightly worse, but the shielding part 2 in this embodiment has two fixed connection positions with the fixed bracket 1, so it has higher stability and reliability, and is therefore more suitable for vehicles with small current but high vibration intensity.

[0049] Specific embodiment 3 of the fluxgate current sensor mounting bracket provided by the utility model:

[0050] This embodiment is based on embodiment 2, and the difference from embodiment 2 is that, see attached Figure 5 In this embodiment, the shielding member 2 is provided with two end plates 21 . The two end plates 21 are respectively located at both ends of the shielding member 2 in the longitudinal direction, and all the side plates are connected between the two end plates 21 .

[0051] The shielding member 2 in this embodiment forms a relatively comprehensive shield for the coil portion of the fluxgate current sensor 3 . In this embodiment, the fluxgate current sensor 3 can dissipate heat through the hole 26 and the bottom opening of the shielding member 2 .

[0052] Compared with the second embodiment, the fluxgate current sensor mounting bracket in this embodiment has an impact on the heat dissipation of the fluxgate current sensor 3 , and is therefore suitable for vehicles with relatively low current.

[0053] Specific embodiment 4 of the fluxgate current sensor mounting bracket provided by the utility model:

[0054] This embodiment is based on Example 1, and the difference from Example 1 is that an end plate is added in this embodiment. The original end plate is the first end plate, and the newly added end plate is the second end plate. The second end plate and the first end plate have the same shape and size. The second end plate and the first end plate are respectively located at the two ends of the shielding member in the longitudinal direction, and each side plate is connected between the first end plate and the second end plate.

[0055] An end surface of the second end plate away from the first side plate is also coplanar with the center plane. In other embodiments, the size and shape of the second end plate can also be selected as needed.

[0056] In this embodiment, no side plate is provided at one end of the shielding member that is away from the first side plate in the transverse direction, so only this end constitutes an open structure.

[0057] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A fluxgate current sensor mounting bracket, comprising a fixed bracket, the fixed bracket comprising a vertical frame body and a bottom frame body located at the bottom of the vertical frame body, the vertical frame body comprising two mounting portions spaced apart in a transverse direction and a connecting portion located between the bottom ends of the two mounting portions, the area enclosed by the mounting portions and the connecting portion being an installation space for installing the fluxgate current sensor, wherein: The fluxgate current sensor mounting frame also includes a shielding member for separating the fluxgate current sensor from the electromagnetic interference source. The shielding member includes at least one end plate and at least one side plate perpendicular to the end plate and integrally or fixedly connected to the end plate. The end plate is located on one longitudinal side of the frame body. A through hole or a through slot for the measured wire to pass through is provided on the end plate. At least one side plate is fixedly connected to one of the connecting parts.

2. The fluxgate current sensor mounting bracket according to claim 1, wherein: The shielding member is provided with an end plate only at one end in the longitudinal direction, and the other end in the longitudinal direction is an open structure without an end plate.

3. The fluxgate current sensor mounting bracket according to claim 1, wherein: One end of the shielding member in the transverse direction is fixedly connected to one of the connecting portions, and the other end of the shielding member in the transverse direction is an open structure without a side plate.

4. The fluxgate current sensor mounting bracket according to claim 2, wherein: One end of the shielding member in the transverse direction is fixedly connected to one of the connecting portions, and the other end of the shielding member in the transverse direction is an open structure without a side plate.

5. The fluxgate current sensor mounting bracket according to claim 3 or 4, characterized in that: A lateral dimension of the shielding member is smaller than a distance between the two mounting portions.

6. The fluxgate current sensor mounting bracket according to claim 5, wherein: An end surface of the shielding member not provided with a side plate in the transverse direction is coplanar with the central plane, and the central plane is perpendicular to the transverse direction and has an equal distance from the two mounting portions.

7. The fluxgate current sensor mounting bracket according to any one of claims 1 to 4, characterized in that: There are at least two side panels, each of which is integrally connected to an end panel and vertically bent, and adjacent side panels are welded and fixed.

8. The fluxgate current sensor mounting bracket according to any one of claims 1 to 4, characterized in that: The side panels and end panels are flat plates.

9. The fluxgate current sensor mounting bracket according to any one of claims 1 to 4, characterized in that: The mounting portion for connecting with the shielding component is provided with a recess for embedding the corresponding side plate on the shielding component, and the depth of the recess is greater than or equal to the thickness of the corresponding side plate.

10. The fluxgate current sensor mounting bracket according to any one of claims 1 to 4, characterized in that: The bottom frame body includes two mounting plates which are integrally connected to the vertical frame body and are vertically bent, and the bending directions of the two mounting plates are opposite.

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