Filtering-integrated integrated current sensor and manufacturing method thereof

Abstract

The invention discloses a filtering-integrated integrated current sensor and a manufacturing method thereof, and relates to the technical field of current sensors, and the integrated current sensor comprises a PCB; the mounting main body is fixedly connected to the PCB, a three-phase copper bar is arranged in the mounting main body in a penetrating manner, and a chip groove is formed outside the mounting main body; the current sensor module comprises a magnetic core and a Hall chip, the magnetic core is fixedly arranged in the mounting main body, a central cavity is defined by the magnetic core, the magnetic core is provided with an air gap notch communicated with the central cavity, the three-phase copper bar penetrates through the central cavity, and the chip groove is located in the air gap notch of the magnetic core; the Hall chip is welded on the PCB, and the Hall chip is arranged in the chip groove; and the filter module comprises a filtering magnetic ring, the filtering magnetic ring is fixedly arranged in the mounting main body, and the filtering magnetic ring is arranged outside the three-phase copper bar in a sleeving manner. The current sensor and the filter are integrated, the performance and the space utilization rate of the new energy automobile electric drive management system are effectively improved, the assembly process flow is optimized, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of current sensors, and in particular to an integrated current sensor with filter integration and its manufacturing method. Background Technology

[0002] Hall current sensors are among the most widely used and numerous sensors due to their advantages such as high sensitivity, large output amplitude, low temperature drift, long service life, high reliability and safety, playing an important role in the new energy vehicle industry.

[0003] In electric vehicle motor controllers, besides current sensors, filters are also core components ensuring the safe, stable, and efficient operation of the system. In traditional technologies, current sensors and filters are typically installed independently. Chinese utility model patent CN210954149U discloses a multi-channel current sensor for new energy vehicles, comprising a mounting body, a PCB assembly, and a housing. An iron core is housed within a receiving slot of the mounting body. The mounting body is fixed to the PCBA via through-hole reflow soldering, and the mounting body and housing are connected by snap-fit ​​connections. Chinese invention patent CN118783909A discloses a filter for a new energy electric vehicle motor controller. This filter structure uses a circuit board to connect capacitors, magnetic rings, and copper busbars to form a filter circuit. Current sensors and filters are usually manufactured separately and then assembled onto the electric vehicle for electrical connection to the drive PCB board.

[0004] In existing technologies, current sensors and filters have relatively complex structures. The PCB needs to be fixed to the mounting body via through-hole reflow soldering, and the mounting body and housing need to be connected by clips. The process is complicated and the manufacturing cost is high. Filters have many components, are large in size, and have high material costs. The filter copper busbar needs to be assembled with the current sensor and driver board, which is complicated, has high manufacturing costs, and occupies a large space overall. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated current sensor with filter integration and its manufacturing method. This invention integrates the current sensor and filter into one unit, which effectively improves the performance and space utilization of the electric drive management system of new energy vehicles, optimizes the assembly process, and significantly reduces manufacturing costs.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: According to a first aspect of the present invention, an integrated current sensor with filter integration is provided, the integrated current sensor comprising: PCB board; The mounting body is fixedly connected to the PCB board, a three-phase copper busbar is installed inside the mounting body, and a chip slot is provided outside the mounting body; A current sensor module includes a magnetic core and a Hall chip. The magnetic core is fixedly disposed within the mounting body and has a central cavity formed around it. The magnetic core has an air gap notch communicating with the central cavity. A three-phase copper busbar passes through the central cavity. The chip slot is located in the air gap notch of the magnetic core. The Hall chip is soldered to the PCB board and is placed in the chip slot. The filter module includes a filter magnetic ring, which is fixedly disposed inside the mounting body and sleeved outside the three-phase copper busbar.

[0007] Furthermore, the three-phase copper busbar is integrally injection molded with the mounting body.

[0008] Furthermore, the magnetic core and the mounting body are integrally injection molded.

[0009] Furthermore, a magnetic ring groove is provided at the end of the mounting body away from the current sensor module. The magnetic ring groove is arranged in a ring around the three-phase copper busbar. The magnetic ring groove passes through the end of the mounting body to form an opening, and the filter magnetic ring is installed in the magnetic ring groove.

[0010] Furthermore, the filter magnetic ring is fixed in the magnetic ring groove by potting compound.

[0011] Furthermore, the mounting body has a sealing end face flush with the opening of the magnetic ring groove, and a sealing ring is connected to the mounting body. The sealing ring is pressed against the sealing end face and blocks the opening of the magnetic ring groove.

[0012] Furthermore, the mounting body includes a first main body and a second main body that are vertically connected. The current sensor module is disposed in the first main body and the filter module is disposed in the second main body. The three-phase copper busbar is bent into an L-shape, and the two perpendicular ends of the three-phase copper busbar are respectively inserted into the first main body and the second main body.

[0013] Furthermore, the mounting body is provided with positioning posts, and the PCB board is provided with positioning holes that are adapted to the positioning posts; And / or, the mounting body is provided with a threaded post, the threaded post is provided with an internal threaded hole, the PCB board is provided with a connection hole, and the PCB board is fixed to the mounting body by screws that pass through the connection hole and are threaded to the threaded post.

[0014] Furthermore, the second main body is provided with a connecting block, the connecting block is provided with a threaded hole, the threaded hole extends parallel to the second main body and passes through the connecting block.

[0015] According to a second aspect of the present invention, a method for manufacturing an integrated current sensor with integrated filtering is provided, for manufacturing the integrated current sensor as described above, the manufacturing method comprising: bending a three-phase copper busbar; integrally injection molding a mounting body, a three-phase copper busbar, and a magnetic core, wherein the mounting body forms a chip slot, a magnetic ring slot, and a threaded post; placing a filter magnetic ring in the magnetic ring slot and sealing it with potting compound; soldering a Hall chip to a PCB board, the PCB board being positioned on the mounting body such that the Hall chip is placed in the chip slot; screws passing through connecting holes in the PCB board and engaging with the threaded post to fix the PCB board to the mounting body; and calibrating and testing the magnetic core, the Hall chip, and the PCB board.

[0016] In summary, the present invention has the following beneficial effects: 1. In the integrated current sensor of this invention, the current sensor module and the filter module are integrated into the mounting body. The three-phase copper busbar passes through the mounting body and simultaneously through the magnetic core of the current sensor module and the filter magnetic ring of the filter module. The current flowing through the three-phase copper busbar is filtered by the filter magnetic ring, and the current magnitude is detected by the current sensor module at the magnetic core. Specifically, the current flowing through the three-phase copper busbar forms a magnetic field, which is collected and guided through the magnetic core to pass through the Hall chip. The Hall chip is soldered to the PCB board. The Hall chip generates a Hall electrical signal based on the magnetic field generated by the current in the three-phase copper busbar and sends the signal to the PCB board. The processor on the PCB board can calculate the magnitude of the current flowing through the three-phase copper busbar based on the Hall electrical signal, thereby realizing current detection. In this solution, the current sensor module and filter module are integrated into a single mounting body, reducing the number of housings and mounting components, eliminating a large amount of material, lowering material costs, and shrinking the overall size of the filter and current sensor. This facilitates the integration and miniaturization of the integrated current sensor. The Hall chip is directly soldered onto the PCB board. When the PCB board is fixedly connected to the mounting body, the Hall chip is directly placed in the chip slot on the mounting body. Therefore, the Hall chip only needs to be installed and calibrated once, simplifying the calibration process, reducing errors caused by secondary calibration, and improving the calibration accuracy of the Hall chip.

[0017] 2. The three-phase copper busbar and the mounting body are integrally injection molded, which makes the three-phase copper busbar stably connected to the mounting body and avoids relative displacement of the magnetic core in the three-phase copper busbar and the mounting body under vibration conditions, thus avoiding affecting the accuracy of current detection.

[0018] 3. The magnetic core and the mounting body are integrally molded, eliminating the housing and housing snap-fit ​​structure in traditional current sensors, further simplifying the structure of the integrated current sensor and saving space and assembly process.

[0019] 4. The main body of the installation is equipped with a magnetic ring groove, which surrounds the three-phase copper busbar. The filter magnetic ring is installed in the magnetic ring groove, so that the filter magnetic ring is sleeved on the outside of the three-phase copper busbar.

[0020] 5. The filter magnetic ring is installed in the magnetic ring groove with potting compound, so that the filter magnetic ring is sealed and fixed firmly.

[0021] 6. The sealing ring is connected to the mounting body and pressed tightly against the sealing end face, enhancing the sealing performance of the integrated current sensor during installation.

[0022] 7. The mounting body includes a first main body and a second main body that are vertically connected. The current sensor module is located in the first main body and the filter module is located in the second main body. This arrangement makes the overall structure of the integrated current sensor more reasonable, and the setting of the filter magnetic ring will not be affected by the PCB board. The three-phase copper busbar is bent into an L-shape to be installed in both the first and second main bodies. This arrangement also allows the three-phase copper busbar to be stably installed in the mounting body and to move relative to the mounting body under the action of external force.

[0023] 8. When connecting the PCB board and the mounting body, the PCB board is positioned by the positioning pins and positioning holes, facilitating the connection between the PCB board and the mounting body, and also making it easier to position the Hall effect chip in the chip slot. The PCB board and the mounting body are connected by screws. The screws pass through the connection holes on the PCB board and engage with the threaded pins on the mounting body to fix the PCB board to the mounting body. This eliminates the need for reflow soldering of the PCB board, reducing operational difficulty and manufacturing costs.

[0024] 9. A connecting block is provided on the second main body. The integrated current sensor can be installed on the motor controller housing through the threaded hole on the connecting block, which facilitates the installation and use of the integrated current sensor.

[0025] 10. In the manufacturing method of the integrated current sensor of the present invention, the three-phase copper busbar is bent and then integrally injection molded with the mounting body, which improves the connection strength between the three-phase copper busbar and the mounting body and avoids the movement of the three-phase copper busbar relative to the mounting body from affecting the detection accuracy; the bent three-phase copper busbar further enhances its connection strength with the mounting body. When the mounting body is injection molded, the magnetic core is also integrally injection molded, so that the magnetic core is integrated into the mounting body, simplifying the structure of the housing and housing connection of the current sensor module. When the mounting body is injection molded, the chip slot, magnetic ring slot and threaded post are formed. The Hall chip is directly soldered to the PCB board and electrically connected to the PCB board. When the PCB board is connected to the mounting body by screws and threaded posts, the Hall chip is placed in the chip slot. Thus, the Hall chip only needs to be calibrated after the PCB board and the mounting body are installed, avoiding the problems of complex calibration and testing processes and reduced accuracy caused by secondary calibration. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of an integrated current sensor according to an embodiment of the present invention.

[0027] Figure 2 This is a vertical cross-sectional structural diagram of an integrated current sensor according to an embodiment of the present invention.

[0028] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at point AA.

[0029] Figure 4 This is a three-dimensional structural diagram of the mounting body and three-phase copper busbar according to an embodiment of the present invention.

[0030] Figure 5 This is a three-dimensional structural diagram of a magnetic core according to an embodiment of the present invention.

[0031] Figure 6 This is a three-dimensional structural schematic diagram of a filter magnetic ring and a three-phase copper busbar according to an embodiment of the present invention.

[0032] In the picture: 1000, Integrated current sensor; 100, PCB board; 110, Positioning hole; 200, Mounting body; 210, First main body; 211, Chip slot; 220, Second main body; 221, Magnetic ring slot; 222, Sealing end face; 230, Connecting block; 240, Positioning post; 250, Threaded post; 260, Internal threaded hole; 300, Current sensor module; 310, Magnetic core; 311, Central cavity; 312, Air gap notch; 320, Hall effect chip; 400, Filter module; 410, Filter magnetic ring; 420, Encapsulating glue; 500, Three-phase copper busbar. Detailed Implementation

[0033] The invention will now be further described with reference to the accompanying drawings.

[0034] This embodiment discloses an integrated current sensor 1000 with integrated filtering, referring to... Figure 1 and Figure 2 The integrated current sensor 1000 includes a PCB board 100, a mounting body 200, a current sensor module 300, and a filter module 400. The mounting body 200 is fixedly connected to the PCB board 100, and a three-phase copper busbar 500 is installed inside the mounting body 200 for transmitting the current to be detected. The current sensor module 300 and the filter module 400 are integrated into the mounting body 200.

[0035] Reference Figures 2 to 4 In this embodiment, the mounting body 200 is an injection-molded part with a chip slot 211 on its outer side. The current sensor module 300 includes a magnetic core 310 and a Hall chip 320. The magnetic core 310 is fixedly disposed inside the mounting body 200, and the Hall chip 320 is placed in the chip slot 211.

[0036] Reference Figures 3 to 5 The magnetic core 310 is an approximately rectangular or circular ring-shaped magnetic core with a notch. The magnetic core 310 surrounds and forms a central cavity 311, and the magnetic core 310 is provided with an air gap notch 312 communicating with the central cavity 311. A three-phase copper busbar 500 passes through the central cavity 311, and the chip slot 211 is located in the air gap notch 312 of the magnetic core 310. The Hall chip 320 is soldered to the PCB board 100, and when the PCB board 100 is connected to the mounting body 200, the Hall chip 320 is placed in the chip slot 211.

[0037] The current flowing through the three-phase copper busbar 500 is detected by the current sensor module 300 at the magnetic core 310. Specifically, the current flowing through the three-phase copper busbar 500 forms a magnetic field, which is collected and guided through the magnetic core 310 and passes through the Hall chip 320. The Hall chip 320 is soldered to the PCB board 100, thus achieving both physical and electrical connection between the Hall chip 320 and the PCB board 100. The Hall chip 320 generates a Hall electrical signal based on the magnetic field generated by the current in the three-phase copper busbar 500 and sends this signal to the PCB board 100. The processor on the PCB board 100 can calculate the magnitude of the current flowing through the three-phase copper busbar 500 based on this Hall electrical signal, thereby achieving current detection.

[0038] In this embodiment, the Hall chip 320 is directly soldered onto the PCB board 100. When the PCB board 100 is fixedly connected to the mounting body 200, the Hall chip 320 is directly placed in the chip slot 211 on the mounting body 200. Thus, the Hall chip 320 only needs to be installed and calibrated once, which simplifies the calibration process, reduces the error caused by secondary calibration, and improves the calibration accuracy of the Hall chip 320.

[0039] In this embodiment, the magnetic core 310 is a silicon steel magnetic core 310, which comprises multiple stacked C-shaped silicon steel sheets. Furthermore, in other embodiments, the magnetic core 310 may also be made of other suitable materials.

[0040] In this embodiment, the magnetic core 310 and the mounting body 200 are integrally injection molded. During the injection molding of the mounting body 200, the molten plastic directly covers the magnetic core 310. After the plastic solidifies, the magnetic core 310 is fixed inside the mounting body 200. This eliminates the need for the housing and housing snap-fit ​​structure in traditional current sensors, further simplifying the structure of the integrated current sensor 1000 and saving space and assembly process. At the same time, the magnetic core 310 is stably fixed inside the mounting body 200 and is not easily shaken relative to the mounting body 200.

[0041] In addition, in other embodiments, the magnetic core 310 can also be assembled with the mounting body 200 in other suitable ways. For example, in some embodiments, the magnetic core 310 can be fixed to the mounting body 200 by means of adhesive bonding, screw fixing, etc.; in some embodiments, a groove for accommodating the magnetic core 310 can be provided in the mounting body 200, and the magnetic core 310 can be placed in the groove and fixed by potting compound 420.

[0042] Reference Figure 2 and Figure 6 The filter module 400 includes a filter magnetic ring 410, which is fixedly installed inside the mounting body 200. The filter magnetic ring 410 is ring-shaped and is sleeved on the outside of the three-phase copper busbar 500. The filter magnetic ring 410 filters the current flowing through the three-phase copper busbar 500.

[0043] In this embodiment, by integrating the current sensor module 300 and the filter module 400 onto the same mounting body 200, the number of housings and mounting components is reduced, a large amount of material is eliminated, material costs are reduced, and the overall volume of the filter and current sensor is reduced, which is beneficial to the integration and miniaturization of the integrated current sensor 1000.

[0044] In this embodiment, during the injection molding of the mounting body 200, a magnetic ring groove 221 is formed at the end away from the current sensor module 300. The magnetic ring groove 221 is arranged in a ring around the three-phase copper busbar 500. The magnetic ring groove 221 passes through the end of the mounting body 200 to form an opening communicating with the outside. The filter magnetic ring 410 passes through the opening and is fixedly installed in the magnetic ring groove 221, so that the filter magnetic ring 410 is sleeved on the outside of the three-phase copper busbar 500.

[0045] In this embodiment, after the filter magnetic ring 410 is installed in the magnetic ring groove 221, it is fixed in the magnetic ring groove 221 by potting adhesive 420. This makes the filter magnetic ring 410 firmly set in the mounting body 200, and ensures the sealing of the filter magnetic ring 410, thereby improving its protection capability.

[0046] The encapsulation surface of the potting compound 420 shall not exceed the opening of the magnetic ring groove 221, so as to avoid the potting compound 420 protruding from the surface of the mounting body 200 after curing and affecting the installation and use of the integrated current sensor 1000.

[0047] In addition, in other embodiments, the filter magnetic ring 410 may also be fixedly mounted to the mounting body 200 in other suitable ways. For example, in some embodiments, the filter magnetic ring 410 may be integrally injection molded with the mounting body 200; in some embodiments, the filter magnetic ring 410 may be fixed to the mounting body 200 by adhesive or screws.

[0048] Reference Figures 1 to 6 In this embodiment, the three-phase copper busbar 500 and the mounting body 200 are integrally injection molded, so that the three-phase copper busbar 500 is stably connected to the mounting body 200, avoiding relative displacement between the three-phase copper busbar 500 and the magnetic core 310 in the mounting body 200 under vibration conditions, which would affect the accuracy of current detection.

[0049] In addition, in other embodiments, holes for the three-phase copper busbar 500 to pass through can be formed in the mounting body 200. After the three-phase copper busbar 500 passes through the holes, it is fixedly connected to the mounting body 200 by glue, screws or other connection methods.

[0050] In this embodiment, the mounting body 200 includes a first main body portion 210 and a second main body portion 220 connected vertically, with the first main body portion 210 and the second main body portion 220 connected in an L-shape. A current sensor module 300 is disposed on the first main body portion 210, and a PCB board 100 is fixedly connected to the first main body portion 210. A filter module 400 is disposed on the second main body portion 220. This arrangement makes the overall structure of the integrated current sensor 1000 more reasonable, and the placement of the filter magnetic ring 410 is not interfered with by the PCB board 100.

[0051] Correspondingly, the three-phase copper busbar 500 is bent into an L-shape, and the two perpendicular ends of the three-phase copper busbar 500 are respectively inserted into the first main body 210 and the second main body 220, and are respectively inserted into the magnetic core 310 and the filter magnetic ring 410. This arrangement also limits the two ends of the three-phase copper busbar 500 to each other, so that the three-phase copper busbar 500 is stably installed in the mounting body 200 and moves relative to the mounting body 200 under the action of external force.

[0052] Furthermore, in other embodiments, the first main body portion 210 and the second main body portion 220 may not be arranged perpendicularly, but at other angles. The bending angle of the three-phase copper busbar 500 is the same as the included angle between the first main body portion 210 and the second main body portion 220.

[0053] In this embodiment, the three-phase copper busbar 500 includes three independent copper conductor busbars for transmitting three-phase current. Correspondingly, the first main body 210 is provided with three sets of current sensor modules 300 and chip slots 211 corresponding to the three sets of current sensor modules 300. The three copper conductor busbars pass through the magnetic cores 310 of the three sets of current sensor modules 300 respectively. Thus, the current of the three copper conductor busbars can be detected separately.

[0054] In this embodiment, the second main body 220 has only one magnetic ring groove 221, and a filter magnetic ring 410 is disposed in the magnetic ring groove 221. All three copper conductor busbars are passed through the same filter magnetic ring 410, and the three copper conductor busbars are filtered by the filter magnetic ring 410. In other embodiments, three filter magnetic rings 410 may also be provided, and the three filter magnetic rings 410 are fitted one-to-one with the three copper conductor busbars.

[0055] Reference Figure 2 The second main body 220 of the mounting body 200 has a sealing end face 222 that is flush with the opening of the magnetic ring groove 221. When the integrated current sensor 1000 is installed in the housing of the motor controller for operation, the mounting body 200 is connected to a sealing ring. The sealing ring is pressed against the sealing end face 222 and blocks the opening of the magnetic ring groove 221, thereby enhancing the sealing performance of the integrated current sensor 1000 during installation.

[0056] Reference Figure 2 The second main body 220 is provided with a connecting block 230, which has a threaded hole that extends parallel to and through the second main body 220. The integrated current sensor 1000 can be installed on the motor controller housing using screws connected to the threaded hole in the connecting block 230, facilitating its installation and use. Simultaneously, during screw tightening, the sealing end face 222 presses against the sealing ring, ensuring sealing performance.

[0057] Reference Figures 1 to 4 The first main body 210 has a positioning post 240 protruding outward, and the PCB board 100 has a positioning hole 110 that matches the positioning post 240. When the PCB board 100 is connected to the mounting body 200, the PCB board 100 is positioned by the positioning post 240 and the positioning hole 110, which facilitates the connection between the PCB board 100 and the mounting body 200, and at the same time facilitates the positioning of the Hall chip 320 in the chip slot 211.

[0058] Reference Figures 1 to 4 The mounting body 200 is provided with a threaded post 250, and the threaded post 250 has an internal threaded hole 260. The end face of the threaded post 250 abuts against the side of the PCB board 100 facing the mounting body 200. The PCB board 100 is provided with a connection hole that aligns with the internal threaded hole 260. The PCB board 100 is fixed to the mounting body 200 by screws that pass through the connection hole and are threaded into the threaded post 250, eliminating the need for reflow soldering of the PCB board 100, thus reducing operational difficulty and manufacturing costs.

[0059] In addition, in other embodiments, the PCB board 100 and the mounting body 200 may also be fixedly connected in other suitable ways.

[0060] This embodiment also discloses a method for manufacturing an integrated current sensor 1000 with integrated filtering, used to manufacture the integrated current sensor 1000 as described above. The manufacturing method includes the following steps: S1. Bend the three-phase copper busbar into an L-shape by 500 degrees.

[0061] S2. The main body 200, the three-phase copper busbar 500 and the magnetic core 310 are integrally injection molded.

[0062] The three-phase copper busbar 500 is bent and then integrally injection molded with the mounting body 200, which improves the connection strength between the three-phase copper busbar 500 and the mounting body 200 and prevents the three-phase copper busbar 500 from moving relative to the mounting body 200, thus avoiding affecting the detection accuracy. The bent three-phase copper busbar 500 further enhances its connection strength with the mounting body 200. The magnetic core 310 is integrally injection molded and integrated into the mounting body 200, simplifying the structure of the current sensor module 300 housing and housing connections.

[0063] The mounting body 200 has three chip slots 211, one magnetic ring slot 221 and several threaded posts 250. The magnetic core 310 and the Hall chip 320 are each provided with three slots. The three chip slots 211 are located in the air gaps 312 of the three magnetic cores 310.

[0064] S3. The filter magnetic ring 410 is placed in the magnetic ring groove 221 and sleeved on the outside of the three-phase copper busbar 500, and sealed and fixed with potting compound 420.

[0065] S4 and three Hall effect chips 320 are all soldered to the PCB board 100.

[0066] S5. The PCB board 100 is positioned on the mounting body 200, so that the three Hall chips 320 are placed in the three chip slots 211 one by one.

[0067] S5. The screw passes through the connection hole of the PCB board 100 and engages with the threaded post 250 to fix the PCB board 100 onto the mounting body 200.

[0068] S6. Calibrate and test the magnetic core 310, Hall chip 320 and PCB board 100.

[0069] The Hall chip 320 is directly soldered to the PCB board 100 and electrically connected to the PCB board 100. When the PCB board 100 is connected to the mounting body 200 by screws and threaded post 250, the Hall chip 320 is placed in the chip slot 211. Thus, the Hall chip 320 only needs to be calibrated after the PCB board 100 and the mounting body 200 are installed, avoiding the problems of complicated calibration and testing process and affected accuracy caused by secondary calibration.

[0070] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. An integrated current sensor with filter integration, characterized in that, The integrated current sensor (1000) includes: PCB board (100); The mounting body (200) is fixedly connected to the PCB board (100), a three-phase copper busbar (500) is provided inside the mounting body (200), and a chip slot (211) is provided outside the mounting body (200); A current sensor module (300) includes a magnetic core (310) and a Hall chip (320). The magnetic core (310) is fixedly disposed within the mounting body (200). A central cavity (311) is formed around the magnetic core (310). An air gap notch (312) communicating with the central cavity (311) is provided in the magnetic core (310). A three-phase copper busbar (500) passes through the central cavity (311). A chip slot (211) is located in the air gap notch (312) of the magnetic core (310). The Hall chip (320) is soldered to the PCB board (100) and is placed in the chip slot (211). The filter module (400) includes a filter magnetic ring (410), which is fixedly disposed inside the mounting body (200) and sleeved on the three-phase copper busbar (500).

2. The integrated current sensor with filter integration as described in claim 1, characterized in that, The three-phase copper busbar (500) and the mounting body (200) are integrally injection molded.

3. The integrated current sensor with filter integration as described in claim 1, characterized in that, The magnetic core (310) and the mounting body (200) are integrally injection molded.

4. The integrated current sensor with filter integration as described in claim 1, characterized in that, A magnetic ring groove (221) is provided at one end of the mounting body (200) away from the current sensor module (300). The magnetic ring groove (221) is arranged in a ring around the three-phase copper busbar (500). The magnetic ring groove (221) passes through the end of the mounting body (200) to form an opening. The filter magnetic ring (410) is installed in the magnetic ring groove (221).

5. The integrated current sensor with filter integration as described in claim 4, characterized in that, The filter magnetic ring (410) is fixed in the magnetic ring groove (221) by potting compound (420).

6. The integrated current sensor with filter integration as described in claim 5, characterized in that, The mounting body (200) has a sealing end face (222) flush with the opening of the magnetic ring groove (221). A sealing ring is connected to the mounting body (200), and the sealing ring is pressed against the sealing end face (222) and blocks the opening of the magnetic ring groove (221).

7. The integrated current sensor with filter integration as described in claim 1, characterized in that, The mounting body (200) includes a first main body (210) and a second main body (220) connected vertically. The current sensor module (300) is disposed in the first main body (210), and the filter module (400) is disposed in the second main body (220). The three-phase copper busbar (500) is bent into an L shape, and the two ends of the three-phase copper busbar (500) that are perpendicular to each other are respectively inserted into the first main body (210) and the second main body (220).

8. The integrated current sensor with filter integration as described in claim 1, characterized in that, The mounting body (200) is provided with a positioning post (240), and the PCB board (100) is provided with a positioning hole (110) that is adapted to the positioning post (240); And / or, the mounting body (200) is provided with a threaded post (250), the threaded post (250) is provided with an internal threaded hole (260), the PCB board (100) is provided with a connecting hole, and the PCB board (100) is fixed to the mounting body (200) by screws that pass through the connecting hole and are threaded to the threaded post (250).

9. The integrated current sensor with filter integration as described in claim 7, characterized in that, The second main body (220) is provided with a connecting block (230), the connecting block (230) is provided with a threaded hole, the threaded hole extends parallel to the second main body (220) and passes through the connecting block (230).

10. A method for manufacturing an integrated current sensor with filter integration, for manufacturing the integrated current sensor (1000) as described in any one of claims 1-9, characterized in that, The manufacturing method includes: bending a three-phase copper busbar (500) and integrally injection molding the mounting body (200), the three-phase copper busbar (500) and the magnetic core (310), wherein the mounting body (200) forms a chip groove (211), a magnetic ring groove (221) and a threaded post (250); a filter magnetic ring (410) is placed in the magnetic ring groove (221) and sealed and fixed with potting compound (420); a Hall chip (320) is soldered to a PCB board (100), and the PCB board (100) is positioned on the mounting body (200) so that the Hall chip (320) is placed in the chip groove (211); screws pass through the connecting holes of the PCB board (100) and engage with the threaded post (250) to fix the PCB board (100) on the mounting body (200); and calibrating and testing the magnetic core (310), the Hall chip (320) and the PCB board (100).

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