Current sensor, power mechanism and electric device

Abstract

The utility model provides a current sensor, a power mechanism and a power utilization device, the current sensor comprises a circuit board, a detection chip and a limiting piece, the detection chip is fixed on one side of the circuit board, the limiting piece and the detection chip are located on the same side of the circuit board, and the surface, facing the circuit board, of the limiting piece sinks inwards to form a limiting concave part; and the detection chip is positioned in the limiting concave part. According to the current sensor, the limiting piece is additionally arranged in the current sensor, and the limiting concave part used for accommodating the detection chip is arranged in the limiting piece, so that the risk that the detection chip inclines and moves relative to the circuit board is reduced by means of the peripheral side wall of the limiting concave part, and the use precision and reliability of the current sensor are improved.

Description

Technical Field

[0001] This application relates to the field of temperature regulation technology, and in particular to a current sensor, a power mechanism, and an electrical device. Background Technology

[0002] With the increasing popularity of new energy electric vehicles, more and more people are buying them. During the driving process, the vehicle's speed also affects everyone's life safety.

[0003] In new energy electric vehicles, the motor controller controls the motor speed and output torque. The motor rotation torque is controlled by the magnitude of the output current of the controller, and the magnitude of the current is monitored by the current sensor. Therefore, the sensitive and reliable current sensor affects the safety of every passenger. Utility Model Content

[0004] In view of the above problems, this application provides a current sensor, a power mechanism, and an electrical device that can improve the reliability of the current sensor.

[0005] On one hand, this application provides a current sensor, including a circuit board, a detection chip, and a limiting member. The detection chip is fixed to one side of the circuit board, and the limiting member and the detection chip are located on the same side of the circuit board. The limiting member is recessed inward toward the surface of the circuit board to form a limiting recess, and the detection chip is located in the limiting recess.

[0006] In the above solution, a limiting component is added to the current sensor, and a limiting recess for accommodating the detection chip is provided in the limiting component. This reduces the risk of the detection chip tilting or moving relative to the circuit board by means of the peripheral sidewall of the limiting recess, thereby improving the accuracy and reliability of the current sensor.

[0007] In some embodiments, the limiting recess is provided through the limiting member along the thickness direction of the circuit board.

[0008] In the above solution, since the limiting recess completely penetrates the limiting member, the detection chip can be exposed relative to the limiting member away from the surface of the circuit board. The peripheral sidewall of the limiting recess can restrict the position of the detection chip, and the limiting member and the detection chip will not come into contact or collide in the thickness direction of the circuit board. This satisfies the limiting requirement while reducing the risk of collision of the detection chip and improving the structural reliability of the detection chip.

[0009] In some embodiments, the detection chip is positioned on the side of the limit member facing away from the circuit board.

[0010] In the above solution, in addition to limiting the detection chip, the limiting component can also protect the detection chip. Furthermore, by setting the detection chip to not extend beyond the side of the limiting component away from the circuit board, more structures in the detection chip can be accommodated in the limiting recess and protected by the limiting component, thereby reducing the risk of the detection chip being damaged by collisions with other structures and improving the reliability of the detection chip.

[0011] In some embodiments, the limiting recess includes a guide portion and a limiting portion located on the side of the guide portion away from the circuit board, the guide portion being connected to the limiting portion. The cross-sectional dimension of the guide portion gradually decreases in the direction approaching the limiting portion.

[0012] In the above solution, by setting the cross-sectional size of the guide portion to gradually decrease in the direction near the limiting portion, the detection chip is guided during insertion into the limiting recess, reducing the risk of collision and deformation of the detection chip relative to the limiting component and improving the reliability of the detection chip. Simultaneously, the presence of the limiting portion satisfies the need to limit the detection chip, reducing the risk of tilting or moving the detection chip relative to the circuit board, thereby improving the accuracy and reliability of the current sensor.

[0013] In some embodiments, the current sensor further includes a magnetic conductor, which encloses a wiring channel and the peripheral surface of the magnetic conductor is recessed inward to form an air gap structure, and the detection chip and the limiting member are located within the air gap structure.

[0014] In the above solution, considering the presence of the limiting component, the size of the air gap structure on the magnetic conductor was increased. This allows the air gap structure to simultaneously accommodate the detection chip and the limiting component, thus achieving the avoidance requirement of the magnetic conductor relative to the limiting component and meeting the structural layout requirements of the current sensor itself. Simultaneously, this design ensures that the portion of the detection chip located within the air gap structure is constrained by the limiting component, making relative tilting movement difficult. This helps improve the accuracy and reliability of the current sensor.

[0015] In some embodiments, there are multiple detection chips and multiple limiting components, and the current sensor also includes a connector that connects different limiting components.

[0016] In the above scheme, by setting up connecting parts, the relative positions between multiple limiting parts can be kept fixed. Under this design, multiple limiting parts can be installed or separated from multiple detection chips with only one operation, which helps to improve the installation or disassembly efficiency of current sensors.

[0017] In some embodiments, the connector is fixed to the circuit board.

[0018] In the above solution, since the connector can connect to different limiting components and is fixed to the circuit board, multiple limiting components can be fixed to the circuit board through the connector, thereby fixing the relative position between the limiting components and the circuit board and reducing the risk of the detection chip tilting or moving relative to the circuit board. Furthermore, since the position of the detection chip corresponds to the position of the limiting components, the connection area between the connector and the circuit board can be staggered with the area where the detection chip is located, thereby reducing the adverse effects of the connection process between the circuit board and the connector on the detection chip and improving the structural reliability of the detection chip.

[0019] In some embodiments, the connector includes a first surface facing the circuit board, and the limiting member includes a second surface facing the circuit board, the second surface being located on the side of the first surface away from the circuit board.

[0020] In the above solution, the second surface of the limiting component is adjusted. The second surface is not located on the same plane as the first surface, but rather on the side of the first surface away from the circuit board. That is, the distance between the second surface and the circuit board in the thickness direction of the circuit board is greater than the distance between the first surface and the circuit board in the same direction. With this design, a gap space can be formed between the second surface and the circuit board, which can accommodate part of the structure of the detection chip connected to the circuit board, thereby achieving an avoidance effect and improving the overall structural reliability.

[0021] In some embodiments, the detection chip includes a body portion and a pin portion that are interconnected. The body portion is located within a limiting recess, and the pin portion is connected to a circuit board. The second surface and the pin portion overlap in their orthographic projections onto the circuit board, and the pin portion is located between the second surface and the circuit board.

[0022] In the above scheme, the second surface and the pin are arranged to overlap in the orthographic projection of the circuit board, that is, the limiting member and the pin are located in the same area relative to the circuit board. Based on this, by setting the second surface on the side of the first surface away from the circuit board, the pin can be located in the gap space between the second surface and the circuit board, thereby reducing the risk of excessive compression of the pin by the limiting member and improving the connection reliability between the detection chip and the circuit board.

[0023] In some embodiments, a plurality of detection chips are spaced apart in a first direction. The connector includes a connecting body extending along the first direction and connecting different limiting members, and a reinforcing rib connected to the connecting body and located between adjacent limiting members. The reinforcing rib extends along a second direction, and the first direction intersects the second direction. Optionally, the first direction, the second direction, and the thickness direction of the circuit board are arranged perpendicularly to each other.

[0024] In the above solution, the orthographic projection of the connector on the circuit board is not a continuous block or planar structure, but rather includes a strip-shaped connecting body and reinforcing ribs. This helps to reduce the overall weight of the limiting components and the connector. Simultaneously, the presence of the connecting body satisfies the relative fixation requirements between adjacent limiting components, while the presence of the reinforcing ribs improves the overall strength of the connector, thus meeting the practical application needs of the current sensor.

[0025] In some embodiments, the current sensor further includes a magnetic conductor, which encloses a wiring channel, and the peripheral surface of the magnetic conductor is recessed inward to form an air gap structure, within which the detection chip and the limiting member are located. The reinforcing rib and the limiting member are spaced apart in a first direction to form a clearance space, within which the magnetic conductor portion is located.

[0026] In the above scheme, the reinforcing rib and the limiting component are not directly connected in contact. They are spaced apart to form a clearance space for some structures in the magnetic conductor, thereby reducing the contact interference between the connector and the magnetic conductor, improving the reliability of the respective structures of the connector and the magnetic conductor, reducing the adverse effects of the connector on the current detection process, and improving the detection accuracy and reliability.

[0027] In some embodiments, the connector further includes a retaining clip protruding from the reinforcing rib toward the circuit board side, and the connector is connected to the circuit board by the retaining clip.

[0028] In the above solution, a fixed latch is provided to enable a detachable connection between the connector and the circuit board, reducing the difficulty of connection and facilitating subsequent replacement and maintenance of the limiting components and connectors, thus demonstrating strong practicality. Furthermore, the fixed latch is positioned on the reinforcing rib. When the circuit board and connector tend to separate due to external forces, the corresponding separation stress is directly transferred to the reinforcing rib through the fixed latch, rather than directly to the connecting body. This reduces the stress on the connecting body and improves the relative fixation reliability between different limiting components.

[0029] In some embodiments, the limiting member and the connecting member are an integral structure, that is, both are made of the same material and are formed together in the same manufacturing process.

[0030] In the above solution, by setting the limiting component and the connecting component as an integral structure, the manufacturing difficulty of the limiting component and the connecting component is reduced, and the connection reliability between the limiting component and the connecting component is improved, which has strong practicality.

[0031] Secondly, embodiments of this application provide a power mechanism, which includes the current sensor in any of the foregoing embodiments.

[0032] In some embodiments, the power mechanism further includes an output component and a motor structure. The current sensor includes a magnetic conductor, which encloses a wiring channel and the peripheral surface of the magnetic conductor is recessed inward to form an air gap structure. The detection chip and the limiting component are located within the air gap structure. The output component is connected to the output end of the motor structure and is disposed through the wiring channel.

[0033] In the above scheme, the current sensor is used to detect the output current of the motor structure, thereby realizing effective monitoring of the corresponding output current of the motor structure. Through the cooperation between the motor structure and the current sensor, the operational reliability of the entire power mechanism can be improved.

[0034] Thirdly, embodiments of this application provide an electrical device, which includes the power mechanism in any of the foregoing embodiments.

[0035] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application;

[0038] Figure 2 This is a partial structural schematic diagram of a power mechanism provided in some embodiments of this application;

[0039] Figure 3 This is a schematic diagram showing the cooperation relationship between a portion of the structure and the output component of a current sensor provided in some embodiments of this application;

[0040] Figure 4 This is a partial structural schematic diagram of a current sensor provided in some embodiments of this application;

[0041] Figure 5 yes Figure 4 Enlarged structural diagram of region Q in the middle region;

[0042] Figure 6 This is a partial structural schematic diagram of a current sensor provided in some embodiments of this application;

[0043] Figure 7 yes Figure 6 A magnified structural diagram of region P in the middle area;

[0044] Figure 8 This is a partial structural schematic diagram of a current sensor provided in some embodiments of this application.

[0045] Tag name:

[0046] Vehicle 1000; Battery unit 100; Controller 200; Motor 300; Power mechanism 400; Current sensor 500;

[0047] Circuit board 10;

[0048] Limiting member 20; limiting recess 21; guide portion 211; limiting portion 212;

[0049] Detection chip 30; Body 31; Pin section 32;

[0050] Magnetic conductor 40; trace channel 41; air gap structure 42;

[0051] 50 Connector; 51 Connector body; 52 Reinforcing rib; 53 Clearance space; 54 Fixing buckle;

[0052] Output component 60;

[0053] Casing 70;

[0054] First surface M1; Second surface M2;

[0055] First direction X; second direction Y; thickness direction Z. Detailed Implementation

[0056] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0058] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0059] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0061] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0062] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0063] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0064] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0065] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0066] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0067] A current sensor is a device used to detect current information. It converts the measured current information into a standard electrical signal to meet the requirements of information transmission, processing, storage, display, recording, and control. Current sensors typically operate based on the Hall effect magnetic balance principle and are characterized by high sensitivity and strong anti-interference capabilities, making them widely used in various electrical applications.

[0068] The operation of a current sensor primarily relies on the Hall effect. When a control current passes through the detection chip, an electric potential is generated in a direction perpendicular to both the current and the magnetic field. This potential is proportional to the magnetic flux density. By measuring this potential, the magnitude of the current can be indirectly measured.

[0069] The power mechanism mentioned in the embodiments of this application includes a current output structure and a current sensor, which is used to detect the output current corresponding to the current output structure. Furthermore, the technical solutions provided in the embodiments of this application are applicable to various electrical devices using this power mechanism; however, for the sake of brevity, the following embodiments will all be described using electric vehicles as an example.

[0070] Current sensors located inside vehicles typically employ Hall effect open-loop technology. Specifically, a current sensor includes a housing, a magnetic core, a circuit board, and a detection chip. The housing is a hollow structure, and the magnetic core, circuit board, and detection chip are all integrated within the hollow structure of the housing. The magnetic core is used to concentrate and guide the magnetic field generated by the current and significantly enhance the magnetic field strength sensed by the detection chip, thereby improving the sensitivity and accuracy of the current sensor.

[0071] The detection chip is a Hall element in Hall open-loop technology. It is placed in the air gap of a magnetic core to sense the magnetic field and output a voltage signal proportional to the magnetic field strength. The circuit board supports and fixes the detection chip and provides the necessary electrical connections, enabling the signal generated by the detection chip to be transmitted to the signal conditioning circuit.

[0072] Next, this application will describe the specific working principle of the current sensor. When the current to be measured flows through the magnetic core, a magnetic field is generated inside the magnetic core. This magnetic field is sensed by the detection chip, which outputs a voltage signal proportional to the magnetic field strength. The signal conditioning circuit processes the output signal of the detection chip and finally outputs a voltage signal proportional to the input current. This signal can be further processed to calculate the actual current value, thereby completing the measurement and monitoring of the current.

[0073] The reliability of current sensors is often affected by a variety of factors, and the stability of the detection chip itself usually also affects the reliability of the current sensor. Considering that the detection chip is typically fixed to the circuit board by support pins, and that these support pins are prone to impact and deformation during the movement of the current sensor, the detection chip is susceptible to tilting relative to the circuit board. This can lead to poor detection accuracy and affect the reliability of the current sensor.

[0074] To address the aforementioned issues, this application provides a current sensor, a power mechanism, and an electrical device. The current sensor incorporates a limiting member located on the same side of the circuit board as the detection chip, and the limiting member includes a limiting recess for accommodating the detection chip. The presence of the limiting member restricts the position of the detection chip, thereby reducing the degree and risk of chip tilting and improving the reliability of the current sensor.

[0075] Please see Figure 1 , Figure 1This is a simplified schematic diagram of a vehicle 1000 provided in an embodiment of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 can be installed inside the vehicle 1000; specifically, for example, the battery device 100 can be installed at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 100 may also include a controller 200 and a motor 300. The controller 200, for example, is used to control the battery to supply power to the motor 300. The battery device 100 can be used for starting, navigation, etc., of the vehicle 1000. Of course, the battery device 100 can also be used to drive the vehicle 1000, replacing or partially replacing gasoline or natural gas to provide propulsion for the vehicle 1000.

[0076] Next, the structure of the current sensor will be described in detail with reference to the accompanying drawings.

[0077] Please see Figures 2 to 5 The current sensor 500 includes a circuit board 10, a detection chip 30, and a limiting member 20. The detection chip 30 is fixed to one side of the circuit board 10. The limiting member 20 and the detection chip 30 are located on the same side of the circuit board 10. The limiting member 20 is recessed inward toward the surface of the circuit board 10 to form a limiting recess 21. The detection chip 30 is located in the limiting recess 21.

[0078] Circuit board 10 is an important component in the electronics industry, used to realize electrical connections between electronic components or between electronic components and circuit structures. Circuit board 10 is usually made of insulating material and has conductive patterns and components arranged on it. Through these patterns and components, circuit board 10 can support electrical connections between electronic components or between electronic components and circuit structures.

[0079] The detection chip 30 is the main component for current sensing. It is located on one side of the circuit board 10 along its thickness direction Z. Besides providing electrical connection between the detection chip 30 and the signal conditioning circuit, enabling the signal generated by the detection chip 30 to be transmitted to the signal conditioning circuit, the circuit board 10 also serves to fix and support the detection chip 30. Optionally, the detection chip 30 can be fixed by soldering.

[0080] In addition to the circuit board 10 and the detection chip 30, the current sensor 500 also includes a limiting member 20, which is a component used to limit the position of the detection chip 30. The limiting member 20 and the detection chip 30 are located on the same side of the circuit board 10 in its thickness direction Z. A limiting recess 21 is formed by the limiting member 20 recessed towards the surface of the circuit board 10. The limiting recess 21 may completely penetrate the limiting member 20 in the thickness direction Z of the circuit board 10, or it may not completely penetrate the limiting member 20.

[0081] The limiting member 20 can be made of various materials, as long as it includes insulating material to reduce its impact on the detection effect of the detection chip 30. Optionally, the limiting member 20 can be made of plastic, so that it will not affect the detection accuracy of the current sensor 500 and will also help reduce the overall cost.

[0082] The detection chip 30 is located within the limiting recess 21, which accommodates the detection chip 30. The limiting recess 21 can have various sizes and shapes. Optionally, the radial cross-section of the limiting recess 21 can match the shape and contour of the detection chip 30. Here, radial refers to the direction perpendicular to the recess direction of the limiting recess 21. The recess direction of the limiting recess 21 can be parallel to the thickness direction Z of the circuit board 10, or it can have a certain tilt angle relative to the thickness direction Z of the circuit board 10. Furthermore, the radial cross-sectional dimensions of the limiting recess 21 at different positions can remain the same or can differ, as long as the limiting recess 21 can restrict the detection chip 30 at at least some positions.

[0083] The limiting recess 21 can have various dimensional relationships with the detection chip 30. For example, the size of at least a portion of the structure in the limiting recess 21 in the first direction X can be equal to the size of the detection chip 30 in the first direction X. In this way, the sidewalls of the limiting member 20 on both sides of the limiting recess 21 in the first direction X can be in contact with the detection chip 30. Alternatively, the size of the limiting recess 21 in the first direction X can be larger than the size of the detection chip 30 in the first direction X. In this way, the sidewall of the limiting member 20 on at least one side of the limiting recess 21 in the first direction X can be spaced apart from the detection chip 30. Similarly, at least a portion of the structure in the limiting recess 21 can have a dimension in the second direction Y equal to the dimension of the detection chip 30 in the second direction Y. This allows the sidewalls of the limiting member 20 located on both sides of the limiting recess 21 in the second direction Y to contact the detection chip 30. Alternatively, the dimension of the limiting recess 21 in the second direction Y can be larger than the dimension of the detection chip 30 in the second direction Y. This allows the sidewall of the limiting member 20 located on at least one side of the limiting recess 21 in the second direction Y to be spaced apart from the detection chip 30. Here, the first direction X and the second direction Y are two directions perpendicular to the thickness direction Z of the circuit board 10 and intersecting each other.

[0084] It should be noted that although the dimensions of the limiting recess 21 in the first direction X and the second direction Y can be larger than the dimensions of the detection chip 30 in the first direction X and the second direction Y, in order to meet the limiting requirements of the detection chip 30, the dimensions of at least a portion of the structure in the limiting recess 21 in the first direction X and the second direction Y should not exceed the dimensions of the detection chip 30 by too much. Optionally, the dimensions of at least a portion of the structure in the limiting recess 21 in the first direction X can be only slightly larger than the dimensions of the detection chip 30 in the first direction X. This satisfies both the limiting function of the detection chip 30 and the assembly requirements of the detection chip 30 relative to the limiting recess 21, reducing the risk of collision damage between the detection chip 30 and the peripheral sidewall of the limiting recess 21.

[0085] Furthermore, the limiting member 20 and the circuit board 10 can have various forms of cooperation. For example, the limiting member 20 can be fixed to the circuit board 10, or the limiting member 20 can be movably connected to the circuit board 10 within a specific range. Alternatively, the limiting member 20 can be connected to other structures in the current sensor 500 other than the detection chip 30 and the circuit board 10, without being connected to the circuit board 10. Further, the limiting member 20 can remain in a fixed position relative to the detection chip 30, or it can be movably positioned relative to the detection chip 30 while meeting the limiting requirements.

[0086] Depending on the specific needs, the current sensor 500 may contain only one detection chip 30, or it may contain multiple detection chips 30. When the current sensor 500 has multiple detection chips 30, the number of limiting members 20 can be the same as the number of detection chips 30, meaning that a limiting member 20 is provided at the location of each detection chip 30. Alternatively, the number of limiting members 20 can be less than the number of detection chips 30, meaning that no limiting members 20 are provided at the locations of some detection chips 30. Figure 3 and Figure 4 The diagram shows a configuration where there are multiple detection chips 30 and multiple limiting members 20, and the multiple detection chips 30 and multiple limiting members 20 are arranged in a corresponding manner to each other.

[0087] When there are multiple limiting members 20, depending on the size of the limiting members 20 themselves and the distance between adjacent detection chips 30, the multiple limiting members 20 can be spaced apart or directly connected. Furthermore, when the multiple limiting members 20 are spaced apart from each other, the different limiting members 20 can be independent structures, or the different limiting members 20 can be connected as a whole through other structures.

[0088] In summary, in this embodiment of the application, by adding a limiting member 20 to the current sensor 500 and providing a limiting recess 21 for accommodating the detection chip 30 within the limiting member 20, the risk of the detection chip 30 tilting relative to the circuit board 10 is reduced by means of the peripheral sidewall of the limiting recess 21, thereby improving the accuracy and reliability of the current sensor 500.

[0089] It should be noted that, in addition to the structures described above, such as Figure 2 As shown, the current sensor 500 also includes other structures, such as a housing 70, which is hollow and contains the circuit board 10, the detection chip 30, and the limiting member 20.

[0090] In some embodiments, the limiting recess 21 is provided through the limiting member 20 along the thickness direction Z of the circuit board 10.

[0091] The recessed direction of the limiting recess 21 is parallel to the thickness direction Z of the circuit board 10, and the detection chip 30 can be exposed relative to the limiting member 20 away from the surface of the circuit board 10. The exposure mentioned here means that the detection chip 30 located in the limiting recess 21 can be observed from the side of the limiting member 20 away from the circuit board 10.

[0092] Depending on the actual needs, the size of the detection chip 30 in the thickness direction Z of the circuit board 10 can be less than or equal to the size of the limiting recess 21 in the thickness direction Z of the circuit board 10, so that the detection chip 30 will not exceed the limiting member 20 and move away from the surface of the circuit board 10; or the size of the detection chip 30 in the thickness direction Z of the circuit board 10 can also be greater than the size of the limiting recess 21 in the thickness direction Z of the circuit board 10, so that the detection chip 30 can be set beyond the limiting member 20 and move away from the surface of the circuit board 10.

[0093] In this embodiment, since the limiting recess 21 completely penetrates the limiting member 20, the detection chip 30 can be exposed relative to the limiting member 20 away from the surface of the circuit board 10. The peripheral sidewall of the limiting recess 21 can restrict the position of the detection chip 30. The limiting member 20 and the detection chip 30 will not come into contact or collide in the thickness direction Z of the circuit board 10. This satisfies the limiting requirement while reducing the risk of collision of the detection chip 30 and improving the structural reliability of the detection chip 30.

[0094] In some embodiments, the detection chip 30 is disposed on the side surface of the limit member 20 away from the circuit board 10.

[0095] In this embodiment, in addition to limiting the detection chip 30, the limiting member 20 can also protect the detection chip 30. Furthermore, by setting the detection chip 30 to not exceed the side surface of the limiting member 20 away from the circuit board 10, more structures in the detection chip 30 can be accommodated in the limiting recess 21 and protected by the limiting member 20, thereby reducing the risk of the detection chip 30 being damaged by collision with other structures and improving the reliability of the detection chip 30.

[0096] In some embodiments, please refer to Figure 5 , Figure 6 and Figure 7 The limiting recess 21 includes a guide portion 211 and a limiting portion 212 located on the side of the guide portion 211 away from the circuit board 10. The guide portion 211 is connected to the limiting portion 212. The cross-sectional size of the guide portion 211 gradually decreases in the direction close to the limiting portion 212.

[0097] The limiting recess 21 includes at least a guide portion 211 and a limiting portion 212. The guide portion 211 is positioned closer to the circuit board 10 than the limiting portion 212. During the assembly of the current sensor 500, the detection chip 30 is first fixed to the circuit board 10, and then inserted into the limiting recess 21. As the detection chip 30 penetrates deeper into the limiting recess 21, it first enters the guide portion 211 and then passes through the guide portion 211 into the limiting portion 212. The guide portion 211 is the part of the limiting recess 21 that guides the insertion of the detection chip 30, while the limiting portion 212 is the main structure in the limiting recess 21 that restricts the detection chip 30.

[0098] Furthermore, in the direction near the limiting portion 212, the cross-sectional dimension of the guide portion 211 gradually decreases, where the cross-sectional dimension refers to the radial cross-sectional dimension. Referring to the accompanying drawings, this cross-sectional dimension can refer to the dimension in the first direction X or the dimension in the second direction Y. For example, in the direction near the limiting portion 212, the guide portion 211 may only gradually decrease in size in the first direction X, or the guide portion 211 may only gradually decrease in size in the second direction Y, or the guide portion 211 may decrease in size in both the first direction X and the second direction Y simultaneously.

[0099] For the limiting part 212, the cross-sectional dimension of the limiting part 212 can be the same as the minimum cross-sectional dimension of the guide part 211, that is, the cross-sectional dimension of the guide part 211 is consistent with the cross-sectional dimension of the limiting part 212 at the position where it communicates with the limiting part 212. Of course, the cross-sectional dimension of the limiting part 212 can also be smaller or larger than the minimum cross-sectional dimension of the guide part 211, as long as the limiting part 212 can meet the insertion requirements of the detection chip 30 and can perform the limiting function of the detection chip 30.

[0100] In this embodiment, by setting the cross-sectional size of the guide portion 211 to gradually decrease in the direction near the limiting portion 212, the detection chip 30 is guided during insertion into the limiting recess 21, reducing the risk of the detection chip 30 being deformed by impact relative to the limiting member 20 and improving the reliability of the detection chip 30. Simultaneously, the presence of the limiting portion 212 satisfies the need to limit the detection chip 30, reducing the risk of the detection chip 30 tilting relative to the circuit board 10, thereby improving the accuracy and reliability of the current sensor 500.

[0101] In some embodiments, please refer to Figure 8The current sensor 500 also includes a magnetic conductor 40, which encloses a wiring channel 41, and the peripheral surface of the magnetic conductor 40 is recessed inward to form an air gap structure 42, and the detection chip 30 and the limiting member 20 are located within the air gap structure 42.

[0102] The magnetic conductor 40 is used to concentrate and guide the magnetic field generated by the current, and significantly enhance the magnetic field strength sensed by the detection chip 30, thereby improving the sensitivity and accuracy of the current sensor 500. Optionally, the magnetic conductor 40 may include a magnetic core. The magnetic conductor 40 may be enclosed to form a wiring channel 41 for passing a detection conductor, wherein the size and shape of the wiring channel 41 can be determined according to the actual size and shape of the conductor to be detected.

[0103] The inner surface of the magnetic conductor 40 can enclose and form a trace channel 41, while the peripheral surface is recessed inward to form an air gap structure 42. Depending on the needs, the air gap structure 42 can be directly connected to the trace channel 41, or the air gap structure 42 can not be directly connected to the trace channel 41. The figure shows the case where the air gap structure 42 is directly connected to the trace channel 41.

[0104] The detection chip 30 is located inside the air gap structure 42. During the detection process, the current to be detected in the detection conductor can generate a magnetic field. This magnetic field is concentrated in the magnetic conductor 40. The detection chip 30 is used to sense the magnetic field strength at the air gap structure 42 and output a voltage signal that is proportional to the magnetic field strength, thereby realizing the current detection function.

[0105] Furthermore, in this embodiment, considering the presence of the limiting member 20, the size of the air gap structure 42 on the magnetic conductor 40 is increased, allowing the air gap structure 42 to simultaneously accommodate the detection chip 30 and the limiting member 20. This achieves the avoidance requirement of the magnetic conductor 40 relative to the limiting member 20, satisfying the structural layout requirements of the current sensor 500 itself. Simultaneously, this design allows the portion of the detection chip 30 located within the air gap structure 42 to be restricted by the limiting member 20, making relative tilting movement difficult, thereby helping to improve the accuracy and reliability of the current sensor 500.

[0106] In some embodiments, such as Figure 3 and Figure 4 As shown, there are multiple detection chips 30 and multiple limiting members 20. The current sensor 500 also includes a connector 50 that connects different limiting members 20.

[0107] The number of detection chips 30 and limiting members 20 are both multiple, and their numbers can be set in a one-to-one correspondence. Alternatively, the number of limiting members 20 can be less than the number of detection chips 30. The attached figure shows the case where the number of detection chips 30 and limiting members 20 are the same and they are set in a corresponding manner, meaning that each detection chip 30 can be limited by its corresponding limiting member 20 to reduce the risk of tilting or movement. Similarly, the number of magnetic conductors 40 is also multiple, with different detection chips 30 disposed within the air gap structures 42 of different magnetic conductors 40.

[0108] In some alternative embodiments, the current sensor 500 can be used to detect three-phase current, which is current transmitted through three conductors, each conductor acting as a loop for the other two, with the phase difference of its three components being one-third of a cycle or a 120° phase angle, respectively. In this case, there are three conductors to be detected, and the current sensor 500 also needs to be equipped with three detection chips 30 and three corresponding magnetic conductors 40, so that the current sensor 500 can simultaneously detect the current in the three conductors to be detected.

[0109] Furthermore, the current sensor 500 also includes a connector 50, which is used to connect different limiting members 20 so that the relative positional relationship between the different limiting members 20 can remain fixed. The connector 50 can be integrally connected to the limiting member 20, or the connector 50 and the limiting member 20 can be separate structures, connected and fixed by welding, bonding, or threaded connections. In addition, the connector 50 can have various sizes and shapes; for example, the orthographic projection of the connector 50 on the circuit board 10 can be strip-shaped, square, circular, annular, or other regular or irregular shapes.

[0110] In this embodiment of the application, by providing the connector 50, the relative positions between the multiple limiting members 20 can be kept fixed. Under this design, the installation or separation of the multiple limiting members 20 relative to the multiple detection chips 30 can be achieved with only one operation, thereby helping to improve the installation or disassembly efficiency of the current sensor 500.

[0111] In some embodiments, the connector 50 is fixed to the circuit board 10. The connector 50 can be connected to the fixing plate in various ways, such as welding, bonding, and threaded connection.

[0112] In this embodiment, since the connector 50 can connect different limiting members 20 and is fixed to the circuit board 10, multiple limiting members 20 can be fixed to the circuit board 10 via the connector 50. This achieves the fixation of the relative position between the limiting members 20 and the circuit board 10, reducing the risk of the detection chip 30 tilting relative to the circuit board 10. Furthermore, since the position of the detection chip 30 corresponds to the position of the limiting members 20, the connection area between the connector 50 and the circuit board 10 can be staggered with the area where the detection chip 30 is located. This reduces the adverse effects of the connection process between the circuit board 10 and the connector 50 on the detection chip 30 and improves the structural reliability of the detection chip 30.

[0113] In some embodiments, such as Figure 4 and Figure 7 As shown, the connector 50 includes a first surface M1 facing the circuit board 10, and the limiting member 20 includes a second surface M2 facing the circuit board 10, with the second surface M2 located on the side of the first surface M1 away from the circuit board 10.

[0114] The first surface M1 is the surface of the connector 50 facing the circuit board 10. Depending on the actual needs, the first surface M1 can be in contact with the circuit board 10, or the first surface M1 can be spaced apart from the circuit board 10. The second surface M2 is the surface of the limiting member 20 facing the circuit board 10, and the limiting recess 21 is formed by the inward recess of the second surface M2.

[0115] As can be seen from the foregoing, the detection chip 30 needs to be connected to the circuit board 10 to fix the detection chip 30 relative to the circuit board 10. However, the part of the detection chip 30 that connects to the circuit board 10 is prone to deformation under external force, which can easily affect the reliability of current transmission between the detection chip 30 and the circuit board 10, and also have an adverse effect on the fixation of the relative position between the detection chip 30 and the circuit board 10.

[0116] Therefore, in this embodiment, the second surface M2 of the limiting member 20 is adjusted. The second surface M2 is not located on the same plane as the first surface M1, but is located on the side of the first surface M1 away from the circuit board 10. That is, the distance between the second surface M2 and the circuit board 10 in the thickness direction Z of the circuit board 10 is greater than the distance between the first surface M1 and the circuit board 10 in the thickness direction Z of the circuit board 10. With this design, a gap space can be formed between the second surface M2 and the circuit board 10, and this gap space can accommodate part of the structure of the detection chip 30 connected to the circuit board 10, thereby achieving an avoidance effect and improving the overall structural reliability.

[0117] It should be noted that the surface of the limiting member 20 facing away from the circuit board 10 and the surface of the connecting member 50 facing away from the circuit board 10 can have various positional relationships. For example, the surface of the limiting member 20 facing away from the circuit board 10 can be on the same plane as the surface of the connecting member 50 facing away from the circuit board 10, or they can be not on the same plane. Optionally, such as Figure 5 As shown, in order to better match the size of the detection chip 30 in the thickness direction of the circuit board 10, the corresponding surface of the limiting member 20 can be set on the side of the corresponding surface of the connector 50 away from the circuit board 10.

[0118] In some embodiments, such as Figure 5 and Figure 7 As shown, the detection chip 30 includes a body portion 31 and a pin portion 32 that are interconnected. The body portion 31 is located within the limiting recess 21, and the pin portion 32 is connected to the circuit board 10. The second surface M2 and the pin portion 32 overlap in their orthographic projections onto the circuit board 10, and the pin portion 32 is located between the second surface M2 and the circuit board 10.

[0119] The body portion 31 is the main part of the detection chip 30. Located within the limiting recess 21 and extending into the air gap structure 42, the body portion 31 senses the magnetic field strength at the air gap structure 42 and generates a voltage signal proportional to the magnetic field strength. The pin portion 32 is the part of the detection chip 30 used to connect to the circuit board 10. The pin portion 32 can be connected to the circuit board 10 by soldering. Multiple pin portions 32 can be distributed along the first direction X on both sides of the detection chip 30, thereby improving the fixing strength of the detection chip 30 relative to the circuit board 10.

[0120] Furthermore, in this embodiment, the second surface M2 and the pin portion 32 are arranged to overlap in the orthographic projection of the circuit board 10, that is, the limiting member 20 and the pin portion 32 are located in the same area relative to the circuit board 10. Based on this, by setting the second surface M2 on the side of the first surface M1 away from the circuit board 10, the pin portion 32 can be located in the gap space between the second surface M2 and the circuit board 10, thereby reducing the risk of the limiting member 20 over-pressing the pin portion 32 and improving the connection reliability between the detection chip 30 and the circuit board 10.

[0121] It should be noted that, depending on the requirements, the second surface M2 can be disposed in contact with the pin portion 32, or the second surface M2 can be disposed at a distance from the pin portion 32. Optionally, the second surface M2 is disposed at a distance from the pin portion 32, thereby further reducing the adverse effect of the limiting member 20 on the connection reliability between the pin portion 32 and the circuit board 10.

[0122] In some embodiments, such as Figure 5and Figure 7 As shown, multiple detection chips 30 are spaced apart in the first direction X. The connector 50 includes a connector body 51 extending along the first direction X and connecting different limiting members 20, and a reinforcing rib 52 connected to the connector body 51 and located between adjacent limiting members 20. The reinforcing rib 52 extends along the second direction Y, and the first direction X intersects the second direction Y. Optionally, the first direction X, the second direction Y, and the thickness direction Z of the circuit board 10 are arranged perpendicularly to each other.

[0123] The first direction X can be the arrangement of multiple detection chips 30, wherein multiple limiting parts 212 corresponding to the multiple detection chips 30 are also spaced apart along the first direction X, and multiple magnetic conductors 40 corresponding to the multiple detection chips 30 are also spaced apart along the first direction X.

[0124] The connecting body 51 is the main structure in the connector 50 used to achieve the connection effect. The connecting body 51 can be a strip-shaped structure extending along the first direction X, and the two ends of the connecting body 51 in the first direction X are respectively connected to two adjacent different limiting members 20.

[0125] The reinforcing rib 52 is a structure in the connector 50 that serves to strengthen the connection. The reinforcing rib 52 extends along the second direction Y and its two ends in the second direction Y are respectively connected to different connecting bodies 51. That is, there are at least two connecting bodies 51 spaced apart in the second direction Y between two adjacent limiting members 20. The presence of the reinforcing rib 52 can provide reliability for the relative position between the two connecting bodies 51.

[0126] Depending on the actual needs, there may be only one reinforcing rib 52 between two adjacent limiting members 20, or there may be two or more reinforcing ribs 52. Furthermore, there may be various positional relationships between the reinforcing rib 52 and the limiting member 20. For example, the reinforcing rib 52 may be spaced apart from the limiting member 20 in the first direction X, or the reinforcing rib 52 may be connected to the limiting member 20 in the first direction X.

[0127] In addition, for the case where the connector 50 is fixed to the circuit board 10, the connector body 51 can be directly connected to the circuit board 10, the reinforcing rib 52 can be directly connected to the circuit board 10, or at least one of the connector body 51 and the reinforcing rib 52 can be provided with other structures to meet the connection requirements of the circuit board 10.

[0128] In this embodiment, the orthographic projection of the connector 50 onto the circuit board 10 is not a continuous block or planar structure, but rather includes a strip-shaped connecting body 51 and reinforcing ribs 52. This helps to reduce the overall weight of the limiting member 20 and the connector 50. Simultaneously, the presence of the connecting body 51 satisfies the relative fixation requirements between adjacent limiting members 20, while the presence of the reinforcing ribs improves the overall strength of the connector 50, thereby meeting the practical application requirements of the current sensor 500.

[0129] In some embodiments, such as Figure 8 As shown, the current sensor 500 also includes a magnetic conductor 40, which encloses a wiring channel 41. The peripheral surface of the magnetic conductor 40 is recessed inward to form an air gap structure 42, and the detection chip 30 and the limiting member 20 are located within the air gap structure 42. The reinforcing rib 52 and the limiting member 20 are spaced apart in the first direction X to form a clearance space 53, and a portion of the magnetic conductor 40 is located within the clearance space 53.

[0130] The clearance space 53 is a cavity structure used to accommodate a portion of the structure within the magnetic conductor 40. The clearance space 53 has reinforcing ribs 52 and limiting members 20 on either side in the first direction X, and two connecting bodies 51 on either side in the second direction Y. Based on this, a portion of the magnetic conductor 40 is located within the clearance space 53, meaning that the portion of the magnetic conductor 40 located within the clearance space 53 is situated between the reinforcing ribs 52 and limiting members 20 in the first direction X, and between the two connecting bodies 51 in the second direction Y.

[0131] In this embodiment, the reinforcing rib 52 and the limiting member 20 are not directly connected in contact. They are spaced apart to form a clearance space 53 for part of the structure in the magnetic conductor 40. This reduces the contact interference between the connector 50 and the magnetic conductor 40, improves the reliability of the respective structures of the connector 50 and the magnetic conductor 40, reduces the adverse effect of the connector 50 on the current detection process, and improves the detection accuracy and reliability.

[0132] In some embodiments, such as Figures 5 to 7 As shown, the connector 50 also includes a fixing buckle 54 protruding from the reinforcing rib 52 toward the circuit board 10, and the connector 50 is connected to the circuit board 10 through the fixing buckle 54.

[0133] The retaining clip 54 is a mechanism for connecting parts, typically made of a material with a certain degree of flexibility. The connector 50 is connected to the circuit board 10 via the retaining clip 54, and the circuit board 10 has a slot or hole structure that mates with the retaining clip 54. Figure 5As shown, when the circuit board 10 has a hole structure corresponding to the fixing clip 54, the fixing clip 54 can be moved relative to the connector 50 by pressing and pass through the hole structure on the circuit board 10, and abut against and limit the side of the circuit board 10 away from the detection chip 30. Similarly, when the connector 50 needs to be separated from the circuit board 10, the fixing clip 54 can also be moved relative to the connector 50 by pressing, and the fixing clip 54 will re-exert itself from the hole structure on the circuit board 10. With this design, the presence of the fixing clip 54 enables a detachable connection between the connector 50 and the circuit board 10.

[0134] In this embodiment, a fixed buckle is provided to achieve a detachable connection between the connector 50 and the circuit board 10, thereby reducing the difficulty of connecting the two and facilitating subsequent replacement and maintenance of the limiting member 20 and the connector 50, which is highly practical. Simultaneously, the fixed buckle 54 is provided on the reinforcing rib 52. When the circuit board 10 and the connector 50 tend to separate due to external force, the corresponding separation stress will be directly transmitted to the reinforcing rib 52 through the fixed buckle 54, rather than directly to the connecting body 51. This reduces the stress on the connecting body 51 and improves the relative fixation reliability between the different limiting members 20.

[0135] In some embodiments, the limiting member 20 and the connecting member 50 are an integral structure, meaning they are made of the same material and formed together in the same manufacturing process. Optionally, the integral structure formed by the limiting member 20 and the connecting member 50 can be formed by injection molding.

[0136] In this embodiment, by setting the limiting member 20 and the connecting member 50 as an integral structure, the manufacturing difficulty of the limiting member 20 and the connecting member 50 is reduced, and the connection reliability between the limiting member 20 and the connecting member 50 is improved, which has strong practicality.

[0137] Secondly, such as Figure 2 As shown, this application provides a power mechanism 400, which includes the current sensor 500 in any of the foregoing embodiments.

[0138] The power mechanism 400 is a structure that realizes power transmission and delivery through electric drive. The power mechanism 400 is equipped with various conductor structures for transmitting current. Depending on the actual needs, a single current sensor 500 may be provided to detect the current in a specific conductor structure. Alternatively, multiple current sensors 500 may be provided to detect the current in multiple different conductor structures.

[0139] It should be noted that the power mechanism 400 provided in this application embodiment has the technical effects of the current sensor 500 in any of the above embodiments. The explanations of the same or corresponding structures and terms as in the above embodiments will not be repeated here.

[0140] In some embodiments, such as Figure 2 and Figure 3 As shown, the power mechanism 400 also includes an output component 60 and a motor structure (not shown in the figure). The current sensor 500 includes a magnetic conductor 40, which encloses a wiring channel 41. The peripheral surface of the magnetic conductor 40 is recessed inward to form an air gap structure 42. The detection chip 30 and the limiting component 20 are located within the air gap structure 42. The output component 60 is connected to the output end of the motor structure and is disposed through the wiring channel 41.

[0141] The motor structure is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction, and it is a major component of the power mechanism 400. Optionally, the motor structure may include an engine. The output component 60 is a component connected to the output terminal of the motor structure to satisfy the current output requirement.

[0142] The current sensor 500 is a device in the power mechanism 400 used to detect the magnitude of the current flowing through the output component 60. Specifically, the output component 60 can pass through the wiring channel 41, while the detection chip 30 is located within the air gap structure 42. During the detection process, the current to be detected in the output component 60 can generate a magnetic field, which is concentrated in the magnetic conductor 40. The detection chip 30 is used to sense the magnetic field strength at the air gap structure 42 and output a voltage signal proportional to the magnetic field strength, thereby realizing the current detection function.

[0143] In this embodiment, the current sensor 500 is used to detect the output current of the motor structure, thereby achieving effective monitoring of the corresponding output current of the motor structure. Through the cooperation between the motor structure and the current sensor 500, the operational reliability of the entire power mechanism 400 is improved.

[0144] Thirdly, embodiments of this application provide an electrical device, which includes the power mechanism 400 in any of the foregoing embodiments.

[0145] It should be noted that the electrical device provided in this application embodiment includes various forms, as long as it includes a structure such as a motor and an electric drive, and is equipped with a current sensor 500 for detecting the current of a specific conductor structure. Optionally, the electrical device can be a vehicle.

[0146] According to some embodiments of this application, such as Figures 2 to 8As shown, the current sensor 500 includes a current plate, a detection chip 30, a limiting member 20, a connector 50, and a magnetic conductor 40. The detection chip 30 is fixed to one side of the circuit board 10. The detection chip 30 includes a body portion 31 and a pin portion 32 interconnected with each other, and the pin portion 32 is connected to the circuit board 10. The limiting member 20 and the detection chip 30 are located on the same side of the circuit board 10. The limiting member 20 penetrates along the thickness direction Z of the circuit board 10 to form a limiting recess 21. The body portion 31 is located within the limiting recess 21 and does not extend beyond the surface of the limiting member 20 facing away from the circuit board 10.

[0147] The limiting recess 21 includes a guide portion 211 and a limiting portion 212 located on the side of the guide portion 211 away from the circuit board 10. The guide portion 211 is connected to the limiting portion 212, and the cross-sectional size of the guide portion 211 gradually decreases in the direction close to the limiting portion 212. The magnetic conductor 40 surrounds and forms a wiring channel 41, and the peripheral surface of the magnetic conductor 40 is recessed inward to form an air gap structure 42. The detection chip 30 and the limiting member 20 are located within the air gap structure 42.

[0148] Multiple detection chips 30 are spaced apart in the first direction X. The connector 50 and the limiting member 20 are integrated. The connector 50 includes a connecting body 51 extending along the first direction X and connecting different limiting members 20, and a reinforcing rib 52 connected to the connecting body 51 and located between adjacent limiting members 20. The reinforcing rib 52 extends along the second direction Y, and the first direction X and the second direction Y intersect. The reinforcing rib 52 and the limiting member 20 are spaced apart in the first direction X to form a clearance space 53, and part of the magnetic conductor 40 is located within the clearance space 53.

[0149] The connector 50 also includes a fixing clip 54 protruding from the reinforcing rib 52 on the side facing the circuit board 10, and the connector 50 is connected to the circuit board 10 via the fixing clip 54. The connector 50 includes a first surface M1 facing the circuit board 10, and the limiting member 20 includes a second surface M2 facing the circuit board 10, with the second surface M2 located on the side of the first surface M1 facing away from the circuit board 10. The second surface M2 overlaps with the pin portion 32 in its orthographic projection onto the circuit board 10, and the pin portion is located between the second surface and the circuit board.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A current sensor, characterized by, The current sensor comprises: a circuit board; a detection chip fixed to one side of the circuit board; a limiting member on the same side of the circuit board as the detection chip, the limiting member recessed towards the surface of the circuit board to form a limiting recess, and the detection chip located in the limiting recess.

2. The current sensor of claim 1, wherein, The limiting recess extends through the limiting member along the thickness direction of the circuit board.

3. The current sensor of claim 2, wherein, The detection chip does not exceed the surface of the limiting member away from the circuit board.

4. The current sensor of claim 1, wherein, The limiting recess comprises a guide portion and a limiting portion on the side of the guide portion away from the circuit board, and the guide portion is in communication with the limiting portion. The cross-sectional size of the guide portion gradually decreases in the direction close to the limiting portion.

5. The current sensor of claim 1, wherein, The current sensor further comprises a magnetic conductor, which encloses a wiring channel, and the peripheral surface of the magnetic conductor is recessed inward to form an air gap structure, and the detection chip and the limiting member are located in the air gap structure.

6. The current sensor of claim 1, wherein, The number of detection chips and limiting members is multiple, and the current sensor further comprises a connecting member connecting different limiting members.

7. The current sensor of claim 6, wherein, The connecting member is fixed to the circuit board.

8. The current sensor of claim 6, wherein, The connecting member comprises a first surface facing the circuit board, and the limiting member comprises a second surface facing the circuit board, and the second surface is located on the side away from the first surface of the circuit board.

9. The current sensor of claim 8, wherein, The detection chip comprises a body portion and a pin portion connected to each other, the body portion is located in the limiting recess, and the pin portion is connected to the circuit board. The second surface and the pin portion are arranged in overlapping projection on the circuit board, and the pin portion is located between the second surface and the circuit board.

10. The current sensor of claim 6, wherein, A plurality of detection chips are arranged at intervals in a first direction, the connecting member comprises a connecting body extending along the first direction and connecting different limiting members, and a reinforcing rib connected to the connecting body and located between adjacent limiting members, the reinforcing rib extends along a second direction, and the first direction intersects the second direction.

11. The current sensor of claim 10, wherein, The current sensor further comprises a magnetic conductor, which encloses a wiring channel, and the peripheral surface of the magnetic conductor is recessed inward to form an air gap structure, and the detection chip and the limiting member are located in the air gap structure. The reinforcing rib and the limiting member are spaced apart in the first direction to form an avoidance space, and the magnetic conductor is partially located in the avoidance space.

12. The current sensor of claim 10, wherein, The connecting member further comprises a fixing buckle protruding from the side surface of the reinforcing rib facing the circuit board, and the connecting member is connected to the circuit board through the fixing buckle.

13. The current sensor of claim 6, wherein, The limiting member and the connecting member are an integral structure.

14. A power mechanism characterized by, The current sensor comprises any one of claims 1 to 13.

15. The power mechanism of claim 14, wherein, The current sensor further comprises an output member and a motor structure, the current sensor comprises a magnetic conductor, which encloses a wiring channel, and the peripheral surface of the magnetic conductor is recessed inward to form an air gap structure, and the detection chip and the limiting member are located in the air gap structure, and the output member is connected to the output end of the motor structure and arranged through the wiring channel.

16. An electrical device, comprising: The power mechanism comprises the current sensor of claim 14 or 15.

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