Diverter, new energy automobile and energy storage equipment
By symmetrically setting mounting holes in the shunt and incorporating a built-in magnetoresistive detection component, the thermoelectric potential phenomenon caused by uneven temperature distribution is solved, thus improving the accuracy of current detection.
Patent Information
- Application Number
- CN202423096420.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-13
AI Technical Summary
When the shunt is detecting current, uneven temperature distribution can cause thermoelectric potential phenomena, which affects the accuracy of current detection.
The first and second mounting holes are symmetrically arranged, and the first and second magnetoresistive detection components are built in respectively to detect the magnetic field generated by the current on the first and second conductive parts, so as to ensure uniform temperature distribution and avoid thermoelectric potential phenomena.
This improves the accuracy of the shunt current detection and reduces detection deviations caused by temperature differences.
Smart Images
Figure CN223624257U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of splitter technology, and in particular to a splitter, a new energy vehicle, and an energy storage device. Background Technology
[0002] In new energy vehicles, shunts are often connected in series in the circuit under test to detect the current flowing through it and output the detection result. In one exemplary technology, to increase detection accuracy, a current detection method is added to one end of the shunt. This method involves creating a structure at one end of the shunt for mounting the detection component. The current flowing through the shunt causes the temperature of the shunt's detection component to rise. Due to the heat conduction characteristics, the temperature at the end of the shunt corresponding to the created structure also rises, while the temperature at the other end of the shunt, being far from the heat source, remains constant. Thus, the shunt's temperature distribution is uneven during current detection, resulting in a thermoelectric potential phenomenon. This thermoelectric potential phenomenon interferes with the accuracy of current detection, causing deviations in the detection results. Utility Model Content
[0003] The main purpose of this utility model is to propose a shunt, a new energy vehicle and an energy storage device, which aims to solve the technical problem that the shunt will exhibit thermoelectric potential when detecting current.
[0004] To achieve the above objectives, this utility model proposes a shunt, comprising:
[0005] A current sensing element, wherein a first conductive element and a second conductive element are disposed opposite to each other, the first conductive element is provided with a first mounting hole, and the second conductive element is provided with a second mounting hole, the first mounting hole and the second mounting hole being symmetrically arranged about the current sensing element.
[0006] A first magnetoresistive detection component is at least partially disposed within the first mounting hole; the first magnetoresistive detection component is used to detect the magnetic field generated by the current flowing through the first conductive element and output a corresponding first magnetic detection signal.
[0007] The second magnetoresistive detection component is at least partially disposed within the second mounting hole; the second magnetoresistive detection component is used to detect the magnetic field generated by the current flowing through the second conductive element and output a corresponding second magnetic detection signal.
[0008] In one embodiment, the current sensing element has a central axis extending along the direction of the first conductive element and the second conductive element, and the first mounting hole and the second mounting hole are located on the central axis.
[0009] In one embodiment, the splitter further includes:
[0010] A substrate is disposed on one side of the first conductive element and / or the second conductive element; the first magnetoresistive detection component is disposed on the substrate at a position corresponding to the first mounting hole, and at least partially extends into the first mounting hole;
[0011] The second magnetoresistive detection component is disposed on the substrate at a position corresponding to the second mounting hole, and at least partially extends into the second mounting hole.
[0012] In one embodiment, the first magnetoresistive detection component includes a first magnetic sensing part and a first magnetoresistive detection module. The first magnetic sensing part is disposed in the first mounting hole. The first magnetoresistive detection module is used to detect the magnetic field generated by the current flowing through the first magnetic sensing part and output a corresponding first magnetic detection signal.
[0013] The second magnetoresistive detection component includes a second magnetic sensing part and a second magnetoresistive detection module. The second magnetic sensing part is disposed in the second mounting hole. The second magnetoresistive detection module is used to detect the magnetic field generated by the current flowing through the second magnetic sensing part and output a corresponding second magnetic detection signal.
[0014] In one embodiment, the splitter further includes:
[0015] A substrate is disposed on one side of the first conductive element and / or the second conductive element; the extending direction of the first conductive element and the second conductive element is a first direction, and the direction intersecting the first direction is a second direction; a first shielding element is disposed on both sides of the substrate in the second direction.
[0016] In one embodiment, a second shielding member is further provided on the substrate. The second shielding member is disposed on the side of the current sensing member facing away from the substrate. The second shielding member extends along a second direction and is integrally connected to the first shielding member in a U-shape.
[0017] In one embodiment, a signal transmission component is further disposed on the substrate, the signal transmission component being electrically connected to the first magnetoresistive detection component and the second magnetoresistive detection component respectively; the signal transmission component is used to transmit the first magnetic detection signal and the second magnetic detection signal.
[0018] This utility model also proposes a new energy vehicle, including any of the above-mentioned splitters.
[0019] This utility model also proposes an energy storage device, including the shunt as described in any of the above claims.
[0020] This utility model proposes a shunt, which includes a current sensing element, a first conductive element and a second conductive element disposed opposite to each other, the first conductive element having a first mounting hole and the second conductive element having a second mounting hole, the first mounting hole and the second mounting hole being symmetrically arranged about the current sensing element; a first magnetoresistive detection component, at least partially disposed in the first mounting hole; a first magnetoresistive detection module for detecting the magnetic field generated by the current flowing through the first conductive element and outputting a corresponding first magnetic detection signal; and a second magnetoresistive detection component, at least partially disposed in the second mounting hole, for detecting the magnetic field generated by the current flowing through the second conductive element and outputting a corresponding second magnetic detection signal. With the above configuration, when the shunt of this utility model detects current, since the first mounting hole and the second mounting hole are symmetrically arranged around the current sensing element, and the heat generated by the first magnetoresistive detection component and the second magnetoresistive detection component due to the current is the same, the temperature distribution of the first conductive component and the temperature distribution of the second conductive component are the same. That is, the temperature distribution at both ends of the shunt is uniform, which avoids the thermoelectric potential phenomenon caused by the temperature difference at both ends of the shunt and improves the accuracy of the shunt current detection. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;
[0023] Figure 2 This is a side view of an embodiment of the present invention.
[0024] Figure 3 This is a side view of another embodiment of the present invention;
[0025] Figure 4 This is a side view of another embodiment of the present invention;
[0026] Figure 5 This is a schematic diagram of the structure of another embodiment of the present utility model;
[0027] Figure 6 This is a schematic diagram of another embodiment of the present invention;
[0028] Figure 7 This is a schematic diagram of another embodiment of the present invention.
[0029] Explanation of icon numbers:
[0030] 10. Current sensing element; 20. First conductive element; 30. Second conductive element; 40. First mounting hole; 50. Second mounting hole; 60. First magnetoresistive detection assembly; 61. First magnetoresistive detection module; 62. First magnetic sensing element; 70. Second magnetoresistive detection assembly; 71. Second magnetoresistive detection module; 72. Second magnetic sensing element; 80. First shielding element; 90. Second shielding element; 100. Signal transmission assembly; 110. Substrate.
[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0033] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0035] In new energy vehicles, shunts are often connected in series in the circuit under test to detect the current flowing through it and output the detection result. In one exemplary technology, to increase detection accuracy, a current detection method is added to one end of the shunt. This method involves creating a structure at one end of the shunt for mounting the detection component. The current flowing through the shunt causes the temperature of the shunt's detection component to rise. Due to the heat conduction characteristics, the temperature at the end of the shunt corresponding to the created structure also rises, while the temperature at the other end of the shunt, being far from the heat source, remains constant. Thus, the shunt's temperature distribution is uneven during current detection, resulting in a thermoelectric potential phenomenon. This thermoelectric potential phenomenon interferes with the accuracy of current detection, causing deviations in the detection results.
[0036] In one exemplary technique, a hole can be provided at either end of the shunt to install a detection component. This detection component can be a magnetic induction component. A Hall effect sensor within the shunt senses the magnetic field generated by the magnetic induction component and outputs a magnetic field strength signal. The main control module within the shunt calculates the magnitude of the current flowing through the circuit under test based on the magnetic field strength signal. It can be understood that the temperature at the end of the shunt with the hole will experience a temperature rise due to the magnetic induction component under the influence of the current, while the other end of the shunt, being far from the heat source, will not experience localized temperature changes. Thus, the temperature distribution of the shunt is uneven during current detection, resulting in a thermoelectric potential phenomenon. This thermoelectric potential phenomenon interferes with the accuracy of current detection, causing deviations in the detection results.
[0037] Therefore, refer to Figure 1 This utility model proposes a current splitter. In one embodiment, the current splitter proposed by this utility model includes:
[0038] A current sensing element 10 is provided with a first conductive element 20 and a second conductive element 30 disposed opposite to each other. The first conductive element 20 is provided with a first mounting hole 40, and the second conductive element 30 is provided with a second mounting hole 50. The first mounting hole 40 and the second mounting hole 50 are symmetrically arranged about the current sensing element 10.
[0039] A first magnetoresistive detection component 60 is at least partially disposed within the first mounting hole 40; the first magnetoresistive detection component 60 is used to detect the magnetic field generated by the current flowing through the first conductive element 20 and output a corresponding first magnetic detection signal.
[0040] The second magnetoresistive detection component 70 is at least partially disposed within the second mounting hole 50; the second magnetoresistive detection component 70 is used to detect the magnetic field generated by the current flowing through the second conductive element 30 and output a corresponding second magnetic detection signal.
[0041] In this embodiment, the current sensing element 10 can be implemented using at least one current sensing resistor, such as an alloy resistor. The alloy resistor can be made of manganese-copper alloy. The current sensing resistor can be directly disposed in the first conductive element 20 and the second conductive element 30 by welding. The first conductive element 20 and the second conductive element 30 are copper busbars disposed on opposite sides of the current sensing element 10 for conducting electricity and / or fixing to corresponding connection terminals in the circuit under test.
[0042] In this embodiment, the first conductive element 20 and the second conductive element 30 are used to mount the current sensing element onto the object being detected, such as a battery. Connection holes can be provided on the first conductive element 20 and the second conductive element 30 for a connector to pass through. The first conductive element 20 and the second conductive element 30 can be made of metal, such as copper. The first magnetoresistive detection component 60 and the second magnetoresistive detection component 70 are disposed within the first mounting hole 40 and the second mounting hole 50, which can achieve electromagnetic shielding to prevent external electromagnetic interference to the detection of the first magnetoresistive detection component 60 and the second magnetoresistive detection component 70.
[0043] In this embodiment, the first mounting hole 40 and the second mounting hole 50 can be rectangular, circular, polygonal, or other shapes. Since the magnetic field shape formed in the rectangular first mounting hole 40 and the second mounting hole 50 is relatively uniform, it helps the first magnetoresistive detection component 60 and the second magnetoresistive detection component 70 to sense the magnetic field. The first mounting hole 40 and the second mounting hole 50 are different from the connecting hole described above; their positions are staggered. Generally, the connecting hole is closer to the ends of the first conductive element 20 and the second conductive element 30.
[0044] In this embodiment, both the first magnetoresistive detection component 60 and the second magnetoresistive detection component 70 are used to detect the magnetic field generated by the current flowing through the first conductive component 20 and output a corresponding magnetic detection signal. This magnetic detection signal is used to output to an external terminal for combined judgment to improve the accuracy of current detection.
[0045] In this embodiment, the first magnetoresistive detection component 60 and the second magnetoresistive detection component 70 can be implemented using discrete components, such as a Hall element and a magnetic sensor, with the magnetic sensing part of the Hall element disposed within a mounting hole. The magnetic sensing part generates a corresponding magnetic field based on the current flowing through the circuit under test, and the magnetic sensor forms a corresponding potential difference based on the strength of the magnetic field generated by the magnetic sensing part. The shunt can also be equipped with a voltage-to-current conversion module, or output the potential difference to an external voltage-to-current conversion module. The voltage-to-current conversion module converts the potential difference sensed by the magnetic sensor into a corresponding current signal, and the main controller or external terminal determines the current value flowing through the circuit under test based on the current signal. It is understood that the resistance detection circuit and the magnetoresistive sensor can be integrated into the same component, which is beneficial for the miniaturization of the shunt.
[0046] In this embodiment, the first magnetoresistive detection component 60 and the second magnetoresistive detection component 70 can also be implemented as an integral component, such as a magnetoresistive detection device made of an amorphous magnetic material. This type of magnetoresistive detection device has high permeability and low hysteresis, does not require a magnetic core, and can directly measure the current flowing in the busbar or circuit board trace under the package, which is beneficial for the miniaturization of the shunt. Examples include anisotropic magnetoresistive, giant magnetoresistive, and rotary-displacement magnetoresistive sensors, all integrated magnetoresistive sensors.
[0047] In this embodiment, the current sensing element 10 has a central axis extending along the direction of the first conductive element 20 and the second conductive element 30, and the first mounting hole 40 and the second mounting hole 50 are located on the central axis. This central axis is the center line extending along the length of the current sensing element 10. Therefore, compared to locations located elsewhere (offset from the central axis), the heat generated by the first magnetoresistive detection component 60 and the second magnetoresistive detection component 70 located on the central axis is conducted uniformly along the central axis direction, allowing the heat to be more easily and evenly distributed between the first conductive element 20 and the second conductive element 30, avoiding localized overheating. It is understood that the central axis, used to describe the symmetry of the current sensing element 10, is infinitely long and is also the central axis of the first conductive element 20 and the second conductive element 30.
[0048] It is understood that the shunt proposed in this utility model has a first mounting hole 40 on the first conductive element 20 and a second mounting hole 50 on the second conductive element 30. The first mounting hole 40 and the second mounting hole 50 are symmetrically arranged about the current sensing element 10. A first magnetoresistive detection component 60 is at least partially disposed within the first mounting hole 40, and a second magnetoresistive detection component 70 is at least partially disposed within the second mounting hole 50. When installed on the battery to detect current, the first magnetoresistive detection module 61 detects the magnetic field generated by the current flowing through the first conductive element 20 and outputs a corresponding first magnetic detection signal. The second magnetoresistive detection component 70 detects the magnetic field generated by the current flowing through the second conductive element 30 and outputs a corresponding second magnetic detection signal. With the above settings, when the shunt of this utility model detects current, since the first mounting hole 40 and the second mounting hole 50 are symmetrically arranged about the current sensing element 10, and the heat generated by the first magnetoresistive detection component 60 and the second magnetoresistive detection component 70 due to the current is the same, the temperature distribution of the first conductive element 20 and the temperature distribution of the second conductive element 30 are the same. That is, the temperature distribution at both ends of the shunt is uniform, which avoids the thermoelectric potential phenomenon caused by the temperature difference at both ends of the shunt and improves the accuracy of the shunt in detecting current.
[0049] Based on the above embodiments, the shunt can further include a control circuit, which is electrically connected to the first magnetoresistive detection module 61 and the second magnetoresistive detection module 71. The control circuit outputs corresponding first and second current detection signals based on the first and second magnetoresistive detection signals. The control circuit can be implemented using a main controller, such as an MCU, DSP (Digital Signal Processor), FPGA (Field Programmable Gate Array), or SOC (System on Chip).
[0050] Based on the above embodiments, the shunt can further include a communication module for communicating with an external terminal. This communication module can be a wireless communication module, such as a WIFI, Bluetooth, or 4G / 5G communication module; or a wired communication module, such as a CAN, SPI, or LIN communication module. The communication module is electrically connected to the first magnetoresistive detection module 61 and the second magnetoresistive detection module 71, and is used to convert the first and second magnetoresistive detection signals output by both modules according to a preset communication protocol before outputting them to the external terminal. The external terminal processes the first and second magnetoresistive detection signals to determine the current of the circuit under test. With this configuration, the shunt of this invention does not require a main controller to process the first and second magnetoresistive detection signals, saving a main controller compared to existing shunts and reducing the material cost of the shunt of this invention.
[0051] Based on the above embodiments, the inside of the shunt may further include a substrate 110, which is disposed on one side of the first conductive element 20 and / or the second conductive element 30; the first magnetoresistive detection component 60 is disposed on the substrate 110 at a position corresponding to the first mounting hole 40, and at least partially extends into the first mounting hole 40.
[0052] In this embodiment, the substrate 110 is a circuit board that can house the circuit modules of the shunt. The substrate 110 can be made of fiberglass board, ceramic substrate, copper substrate, etc. The substrate 110 is electrically connected to the current sensing element 10 of the shunt to output the signal of the current sensing element 10.
[0053] In this embodiment, the substrate 110 and the current sensing element 10 are arranged side by side. The substrate 110 is connected to the first conductive element 20 and / or the second conductive element 30, and a first magnetoresistive detection component 60 and a second magnetoresistive detection component 70 are arranged on the side facing the current sensing element 10. The first magnetoresistive detection component 60 protrudes from the substrate 110 into the first mounting hole 40, and may extend partially or completely into the first mounting hole 40.
[0054] In one embodiment of the present invention, the first magnetoresistive detection component 60 includes a first magnetic sensing part 62 and a first magnetoresistive detection module 61. The first magnetic sensing part 62 is disposed in the first mounting hole 40. The first magnetoresistive detection module 61 is used to detect the magnetic field generated by the current flowing through the first magnetic sensing part 62 and output a corresponding first magnetic detection signal.
[0055] The second magnetoresistive detection component 70 includes a second magnetic sensing part 72 and a second magnetoresistive detection module 71. The second magnetic sensing part 72 is disposed in the second mounting hole 50. The second magnetoresistive detection module 71 is used to detect the magnetic field generated by the current flowing through the second magnetic sensing part 72 and output a corresponding second magnetic detection signal.
[0056] In this embodiment, the first magnetoresistive detection module 61 and the second magnetoresistive detection module 71 can be implemented using a resistance detection circuit, and the first magnetic sensing unit 62 and the second magnetic sensing unit 72 can be implemented using a magnetoresistive sensor. The magnetoresistive sensor adjusts its resistance value according to the magnetic field strength generated by the current flowing through the circuit under test. The resistance detection circuit can be implemented using a resistance detection chip, a constant current source, a voltage detection circuit, a main controller, etc., to detect the resistance value across the magnetoresistive sensor and output a corresponding voltage value magnetic detection signal. The external terminal can determine the resistance across the magnetoresistive sensor based on the voltage value of the magnetic detection signal, and then determine the current in the circuit under test according to the preset resistance-magnetic field strength-current mapping table of the corresponding magnetoresistive sensor (obtained by the R&D personnel through multiple tests and experiments).
[0057] Based on the above embodiments, the splitter further includes:
[0058] A substrate 110 is disposed on one side of the first conductive element 20 and / or the second conductive element 30; a first magnetoresistive detection module 61 is disposed on the substrate 110 at a position corresponding to the first magnetic sensing part 62; and a second magnetoresistive detection module 71 is disposed on the substrate 110 at a position corresponding to the second magnetic sensing part 72.
[0059] Optional, see reference Figure 2The first mounting hole 40 and the second mounting hole 50 are respectively disposed on the portions where the projections of the first conductive element 20 and the second conductive element 30 overlap with those of the substrate 110. The substrate 110 is provided with mounting holes corresponding to the positions of the first mounting holes 40 and the second mounting holes 50. The first magnetoresistive detection module 61 and the second magnetoresistive detection module 71 are respectively disposed in the corresponding mounting holes on the substrate 110, so that the first magnetoresistive detection module 61 and the first magnetic sensing part 62 are in the same position, and the second magnetoresistive detection module 71 and the second magnetic sensing part 72 are in the same position. This arrangement allows the magnetoresistive detection module and the magnetic sensing part to be integrated into the same component, forming an integrated magnetoresistive sensor such as anisotropic magnetoresistive, giant magnetoresistive, and rotary displacement magnetoresistive sensors, which is beneficial for the miniaturization of the shunt.
[0060] Optional, see reference Figure 3 The first mounting hole 40 and the second mounting hole 50 are respectively disposed on the portions where the projections of the first conductive element 20 and the second conductive element 30 coincide with those of the substrate 110. The first magnetoresistive detection module 61 and the second magnetoresistive detection module 71 are respectively disposed on the portions where the projections of the first mounting hole and the second mounting hole are onto the substrate, so that the first magnetoresistive detection module 61 and the first magnetic sensing part 62 are in the same position, and the second magnetoresistive detection module 71 and the second magnetic sensing part 72 are in the same position. This configuration is described in reference [reference needed]. Figure 4 This allows the magnetoresistive detection module and the magnetic sensing element to be integrated into the same component, forming an integrated magnetoresistive sensor such as anisotropic magnetoresistive, giant magnetoresistive, and rotary displacement magnetoresistive sensors, which is beneficial for the miniaturization of the shunt.
[0061] Optional, see reference Figure 5 The first mounting hole 40 and the second mounting hole 50 are respectively located on the portions where the projections of the first conductive element 20 and the second conductive element 30 do not overlap with those of the substrate 110. The first magnetoresistive detection module 61 is located on the side of the substrate 110 near the first mounting hole 40, so that the first magnetoresistive detection module 61 can better sense the first magnetic sensing part 62. Similarly, the second magnetoresistive detection module 71 and the second magnetic sensing part 72 are separately arranged. The second magnetoresistive detection module 71 is located on the substrate 110 near the second mounting hole 50, so that the second magnetoresistive detection module 71 can better sense the second magnetic sensing part 72. Compared with the above embodiment where the magnetoresistive detection module and the magnetic sensing part are integrated in the same component, this embodiment has lower space requirements. Researchers have more choices in selecting the magnetoresistive detection module and the magnetic sensing part according to performance requirements such as measurement accuracy, response speed, and temperature stability, thereby improving the accuracy of the shunt current detection.
[0062] In the above embodiments, the first conductive element 20 and the second conductive element 30 can electromagnetically shield the first magnetoresistive detection component 60 and the second magnetoresistive detection component 70 to avoid external electromagnetic interference. However, some interference may still exist in the second direction of the substrate 110, causing electromagnetic interference to the substrate 110. To avoid electromagnetic interference to the substrate 110, in one embodiment of this utility model, referring to... Figure 6 The splitter further includes:
[0063] A substrate 110 is disposed on one side of the first conductive element 20 and / or the second conductive element 30; the extending direction of the first conductive element 20 and the second conductive element 30 is a first direction, and the direction intersecting the first direction is a second direction; a first shielding element 80 is disposed on both sides of the substrate 110 in the second direction.
[0064] In this embodiment, the shielding component can be made of metal plates such as copper plates, aluminum plates, nickel-copper alloy plates, or stainless steel plates, which have good shielding effect against electromagnetic interference.
[0065] In this embodiment, when the interference signal (e.g., electromagnetic interference signal) originates from both sides of the substrate 110 in the second direction, the substrate 110 needs to be provided with a first shield 80 on both sides of the first direction to shield the interference signal from both sides from affecting the magnetoresistive detection component, effectively ensuring the detection of the magnetic field by the magnetoresistive detection component, thereby improving the accuracy of the shunt current detection.
[0066] Further reference Figure 7 In this embodiment, a second shielding member 90 is further provided on the substrate 110. The second shielding member 90 is disposed on the side of the current sensing element 10 facing away from the substrate 110. The second shielding member 90 extends along a second direction and is integrally connected to the first shielding member 80 in a U-shape. The second shielding member 90 is used to shield interference signals originating from the side of the current sensing element 10 facing away from the substrate 110, i.e., electromagnetic interference in the thickness direction of the substrate 110. With this configuration, the first shielding member 80 and the second shielding member 90 together form all-round shielding protection, further reducing the impact of external electromagnetic interference on the magnetoresistive detection component, thereby improving the overall anti-interference capability of the shunt.
[0067] In addition, the first magnetoresistive detection component 60 and the second magnetoresistive detection component 70 may be located between the two first shielding components 80 to further superimpose the electromagnetic shielding interference effect.
[0068] refer to Figure 6 and Figure 7In one embodiment of the present invention, a signal transmission component 100 is further provided on the substrate 110. The signal transmission component 100 is electrically connected to the first magnetoresistive detection component 60 and the second magnetoresistive detection component 70, respectively. The signal transmission component 100 is used to transmit the first magnetic detection signal and the second magnetic detection signal.
[0069] In this embodiment, the signal transmission component 100 can be implemented using an interface that outputs data to the data connection line when transmitting data, such as an RS-232 interface, RS-485 interface, COM interface, or USB interface, etc.
[0070] In this embodiment, the signal transmission component 100 transmits the first magnetic detection signal and the second magnetic detection signal to an external terminal, which processes the first and second magnetic detection signals to determine the current value on the circuit under test. With this configuration, the shunt of this invention does not require a main controller to process the first and second magnetic detection signals, saving a main controller compared to existing shunts and reducing the material cost of the shunt of this invention.
[0071] This utility model also proposes a new energy vehicle, including a splitter as described in any of the above claims.
[0072] It is worth noting that since the new energy vehicle of this utility model is based on the above-mentioned splitter, the embodiments of the new energy vehicle of this utility model include all the technical solutions of all the embodiments of the above-mentioned splitter, and the technical effects achieved are exactly the same, so they will not be repeated here.
[0073] This utility model also proposes an energy storage device, including a shunt as described in any of the above.
[0074] In this embodiment, the energy storage device can be a battery module, an outdoor power module, etc.
[0075] It is worth noting that since the energy storage device of this utility model is based on the above-mentioned shunt, the embodiments of the energy storage device of this utility model include all the technical solutions of all the embodiments of the above-mentioned shunt, and the technical effects achieved are exactly the same, so they will not be repeated here.
[0076] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A shunt, characterized in that, include: A current sensing element, wherein a first conductive element and a second conductive element are disposed opposite to each other, the first conductive element is provided with a first mounting hole, and the second conductive element is provided with a second mounting hole, the first mounting hole and the second mounting hole being symmetrically arranged about the current sensing element. A first magnetoresistive detection component is at least partially disposed within the first mounting hole; the first magnetoresistive detection component is used to detect the magnetic field generated by the current flowing through the first conductive element and output a corresponding first magnetic detection signal. The second magnetoresistive detection component is at least partially disposed within the second mounting hole; the second magnetoresistive detection component is used to detect the magnetic field generated by the current flowing through the second conductive element and output a corresponding second magnetic detection signal.
2. The shunt as described in claim 1, characterized in that, The current sensing element has a central axis extending along the direction of the first conductive element and the second conductive element, and the first mounting hole and the second mounting hole are located on the central axis.
3. The shunt as described in claim 1, characterized in that, The splitter also includes: A substrate is disposed on one side of the first conductive element and / or the second conductive element; the first magnetoresistive detection component is disposed on the substrate at a position corresponding to the first mounting hole, and at least partially extends into the first mounting hole; The second magnetoresistive detection component is disposed on the substrate at a position corresponding to the second mounting hole, and at least partially extends into the second mounting hole.
4. The shunt as described in claim 1, characterized in that, The first magnetoresistive detection component includes a first magnetic sensing part and a first magnetoresistive detection module. The first magnetic sensing part is disposed in the first mounting hole. The first magnetoresistive detection module is used to detect the magnetic field generated by the current flowing through the first magnetic sensing part and output a corresponding first magnetic detection signal. The second magnetoresistive detection component includes a second magnetic sensing part and a second magnetoresistive detection module. The second magnetic sensing part is disposed in the second mounting hole. The second magnetoresistive detection module is used to detect the magnetic field generated by the current flowing through the second magnetic sensing part and output a corresponding second magnetic detection signal.
5. The shunt as described in claim 4, characterized in that, The splitter also includes: A substrate is disposed on one side of the first conductive element and / or the second conductive element; a first magnetoresistive detection module is disposed on the substrate at a position corresponding to the first magnetic sensing portion; and a second magnetoresistive detection module is disposed on the substrate at a position corresponding to the second magnetic sensing portion.
6. The shunt as claimed in claim 1, characterized in that, The splitter also includes: A substrate is disposed on one side of the first conductive element and / or the second conductive element; the extending direction of the first conductive element and the second conductive element is a first direction, and the direction intersecting the first direction is a second direction; a first shielding element is disposed on both sides of the substrate in the second direction.
7. The shunt as described in claim 6, characterized in that, A second shielding member is also provided on the substrate. The second shielding member is positioned on the side of the current sensing member facing away from the substrate. The second shielding member extends along a second direction and is integrally connected to the first shielding member in a U-shape.
8. The shunt as described in claim 3, characterized in that, The substrate is further provided with a signal transmission component, which is electrically connected to the first magnetoresistive detection component and the second magnetoresistive detection component respectively; the signal transmission component is used to transmit the first magnetic detection signal and the second magnetic detection signal.
9. A new energy vehicle, characterized in that, Includes the shunt as described in any one of claims 1-8.
10. An energy storage device, characterized in that, Includes the shunt as described in any one of claims 1-8.