Diverter, new energy automobile and energy storage equipment of new energy automobile

Abstract

The utility model discloses a flow divider, a new energy automobile and energy storage equipment of the new energy automobile, and relates to the technical field of flow dividers. The flow divider comprises a flow divider body; the substrate is electrically connected with the shunt body; the magnetic resistance detection assembly is arranged on the substrate, and the magnetic resistance detection assembly is used for detecting a magnetic field generated by current flowing through the shunt body and outputting a corresponding magnetic detection signal; the shielding assembly shields the magnetic resistance detection assembly in the first direction so as to shield interference signals in the first direction, and the first direction intersects with or is perpendicular to the direction of current flowing through the shunt body. The utility model aims to improve the detection accuracy of the shunt.

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 its energy storage device. Background Technology

[0002] When an electric current flows through a conductor, according to Ampere's law, the current generates a circular magnetic field in the surrounding space. The strength of the magnetic field is directly proportional to the current; that is, the larger the current, the stronger the magnetic field. Therefore, a current detection device can indirectly determine the magnitude of the current flowing through the conductor by detecting the corresponding magnetic field strength using a magnetoresistive detection component. However, in practical applications, in addition to the magnetic field generated by the current itself, other magnetic fields, known as "stray magnetic fields," exist around the conductor to be detected. These stray magnetic fields may originate from other currents flowing nearby, nearby permanent magnets, or even the Earth's magnetic field, which has a very small influence. These stray magnetic fields will reduce the detection accuracy of the magnetoresistive detection component. Utility Model Content

[0003] The main purpose of this utility model is to provide a shunt, a new energy vehicle and its energy storage device, which aims to improve the accuracy of shunt detection.

[0004] To achieve the above objectives, this utility model proposes a current splitter, the current splitter comprising:

[0005] Shunt body;

[0006] The substrate is electrically connected to the shunt body;

[0007] A magnetoresistive detection component is disposed on the substrate. The magnetoresistive detection component is used to detect the magnetic field generated by the current flowing through the shunt body and output a corresponding magnetic detection signal.

[0008] A shielding component is provided, which blocks the magnetoresistive detection component in a first direction to shield interference signals in the first direction, which is either intersecting with or perpendicular to the direction of the current flowing through the shunt body.

[0009] Optionally, the shunt body includes a current sensing element and a first conductive element and a second conductive element disposed opposite to each other at both ends of the current sensing element, wherein the extending direction of the first conductive element and the second conductive element is the current direction of the shunt body; the shielding assembly includes a first shielding element, wherein the first shielding element is disposed on at least one side of the substrate in a first direction.

[0010] Optionally, the first shielding member is provided on both sides of the substrate in the second direction.

[0011] Optionally, a second shielding member is further provided on the substrate, the second shielding member being disposed on the side of the shunt body facing away from the substrate.

[0012] Optionally, the second shielding member extends along the second direction and is connected to the two first shielding members.

[0013] Optionally, the substrate has two mounting through holes spaced apart in the first direction, and the two first shielding members pass through the two mounting through holes one-to-one. The second shielding member is integrally disposed with the two first shielding members.

[0014] Optionally, the splitter further includes a housing, and the shielding assembly is disposed on the housing.

[0015] Optionally, the substrate is provided with an output interface, the shunt body is connected to the output interface via the substrate, and the magnetoresistive detection component is connected to the output interface.

[0016] This utility model also proposes a new energy vehicle, including a splitter as described in any of the above claims.

[0017] This utility model also proposes an energy storage device, including a shunt as described in any of the above claims.

[0018] This invention proposes a shunt, comprising: a shunt body, a substrate, a magnetoresistive detection component, and a shielding component. The substrate is electrically connected to the shunt body. The magnetoresistive detection component is disposed on the substrate and is used to detect the magnetic field generated by the current flowing through the shunt body, outputting a corresponding magnetic detection signal. The shielding component blocks the magnetoresistive detection component in a first direction to shield interference signals in that direction, which intersects with or is perpendicular to the direction of the current flowing through the shunt body. With this configuration, the shunt can detect the magnetic field generated by the current in the shunt body through the magnetoresistive detection component, thereby obtaining the corresponding magnetic detection signal. Furthermore, by setting the shielding component in the first direction, which intersects with or is perpendicular to the current direction of the shunt body, the magnetoresistive detection component is blocked in that first direction, thus shielding interference signals and effectively reducing the impact of interference signals on the magnetoresistive detection component, thereby improving the accuracy of the shunt current detection. Attached Figure Description

[0019] 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.

[0020] Figure 1This is a schematic diagram of the structure of the shunt of this utility model;

[0021] Figure 2 This is a side view of the distributor of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of an embodiment of the current splitter of this utility model;

[0023] Figure 4 This is a schematic diagram of another embodiment of the current splitter of this utility model.

[0024] Explanation of icon numbers:

[0025] 10. Shunt body; 20. Base plate; 30. Magnetoresistive detection component; 40. Shielding component; 41. First shielding component; 42. Second shielding component; 50. Output interface.

[0026] 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

[0027] 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 protection scope of the present utility model.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] Furthermore, the use of terms such as "first" and "second" in this utility model is 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 as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] When an electric current flows through a conductor, according to Ampere's law, the current generates a circular magnetic field in the surrounding space. The strength of the magnetic field is directly proportional to the current; that is, the larger the current, the stronger the magnetic field. Therefore, a current detection device can indirectly determine the magnitude of the current flowing through the conductor by detecting the corresponding magnetic field strength using a magnetoresistive detection component. However, in practical applications, in addition to the magnetic field generated by the current itself, other magnetic fields, known as "stray magnetic fields," exist around the conductor to be detected. These stray magnetic fields may originate from other currents flowing nearby, nearby permanent magnets, or even the Earth's magnetic field, which has a very small influence. These stray magnetic fields will reduce the detection accuracy of the magnetoresistive detection component.

[0031] To address the aforementioned problems, this utility model proposes a shunt, with reference to... Figure 1 and Figure 2 The current splitter proposed in this utility model includes:

[0032] Shunt body 10;

[0033] The substrate 20 is electrically connected to the shunt body 10;

[0034] A magnetoresistive detection component 30 is disposed on the substrate 20. The magnetoresistive detection component 30 is used to detect the magnetic field generated by the current flowing through the shunt body 10 and output a corresponding magnetic detection signal.

[0035] The shielding component 40 forms a shield against the magnetoresistive detection component 30 in a first direction to shield the interference signal in the first direction, which is intersecting or perpendicular to the direction of the current flowing through the shunt body 10.

[0036] In this embodiment, the substrate 20 can be made of fiberglass board, ceramic substrate, copper substrate, etc. One side of the substrate 20 can be attached to and electrically connected to the shunt body 10; the other side is provided with a magnetoresistive detection module and a shielding component 40.

[0037] In this embodiment, the shunt body 10 includes a current sensing element. This current sensing element can be implemented using at least one current sensing resistor, such as an alloy resistor. The alloy resistor can be made of a manganese-copper alloy, and the current sensing resistor can be directly connected in series in the circuit where the current to be detected is to be directly welded. Alternatively, the current sensing element can be implemented using at least one current sensing resistor and a conductive element connected to it. For example, copper busbars for conducting electricity and / or fixing to corresponding connection terminals in the circuit where the current to be detected is to be located on both sides of an alloy resistor. The sampling component on the substrate 20 can be electrically connected to both sides of the alloy resistor via sampling lines to obtain the voltage across the alloy resistor, process it, and output two sets of corresponding voltage detection signals. It is understood that the resistance value of the alloy resistor is a preset value. Therefore, in subsequent processing by the external terminal, the potential difference across the alloy resistor can be obtained from the two sets of corresponding voltage detection signals, and the current flowing through the alloy resistor can be calculated using Ohm's law.

[0038] Optionally, the magnetoresistive detection component 30 can be implemented using anisotropic magnetoresistive (AGM), giant magnetoresistive (GMR) sensors, or rotationally displaced magnetoresistive (ODM). Taking a GMR sensor as an example, the GMR sensor consists of multiple alternating ferromagnetic metal layers and non-magnetic conductive layers. A typical structure includes two ferromagnetic layers (such as cobalt, iron, or nickel) sandwiching a very thin non-magnetic metal layer (such as copper). When these structures are affected by an external magnetic field, their resistance changes significantly, and this change can be used to measure the strength and direction of the magnetic field. Under ideal conditions, when no current flows through the current sensing element, the current sensing element will not generate a corresponding magnetic field due to the current. In this case, the magnetization directions of adjacent ferromagnetic layers in the GMR sensor may be random or antiparallel, resulting in significant scattering of electrons as they pass through different layers, leading to higher resistance. When current flows through the current sensing element, the current sensing element will generate a corresponding magnetic field due to the current. In this case, the magnetization directions of the two ferromagnetic materials in the GMR sensor will tend to align parallel due to the magnetic field. Due to the spin property of electrons, electrons parallel to the magnetization direction encounter less scattering, allowing them to move more freely and thus reducing resistance. Therefore, by detecting the resistance change in the magnetoresistive detection component 30, the change in the magnetic field generated by the current sensing element can be obtained. An external terminal can calculate the current value flowing through the current sensing element using the magnetic detection signal output from the magnetoresistive detection component 30.

[0039] As described above, the magnetoresistive detection component 30 detects the magnetic field generated by the current flowing through the shunt body 10, outputs a magnetic detection signal, and then calculates the current value flowing through the shunt body 10. Therefore, when there is interference in the magnetic field detected by the magnetoresistive detection component 30, the output magnetic detection signal will inevitably have errors, leading to inaccurate calculated current values. This "stray magnetic field" will reduce the detection accuracy of the magnetoresistive detection component.

[0040] To address the aforementioned issues and ensure the accuracy of the magnetoresistive detection component 30, holes can be drilled on one side of the copper busbars on both sides of the shunt body 10, with the hole size corresponding to the size of the magnetoresistive detection component 30. This allows the shunt body 10 itself to shield against stray magnetic fields. It is understood that the shunt body 10 typically uses a material with good conductivity to facilitate current transmission. Materials with good conductivity usually possess a certain degree of electromagnetic shielding. Therefore, the shunt body 10 can effectively shield against stray magnetic fields. However, creating holes in the shunt body 10 alters the current flow path, increasing the current density at the hole edges and leading to more concentrated heat generation. This more concentrated heat generation results in a thermoelectric potential on the copper busbars on both sides of the shunt body, which in turn reduces the accuracy of the magnetoresistive detection component 30.

[0041] It is understood that the current flowing through the shunt body 10 will generate a corresponding magnetic field in its perpendicular direction. The magnetoresistive detection component 30 can output a corresponding magnetic detection signal by detecting the magnetic field in this direction. Therefore, the shielding component 40 needs to shield the interference signal in the direction that intersects or is perpendicular to the direction of the current flowing through the shunt body 10, that is, to shield the interference signal in the first direction. The shielding component 40 can be made of materials such as nickel-iron alloy or soft magnetic ferrite, which can effectively guide and concentrate magnetic field lines and shield stray magnetic fields. In addition, in the technical solution of this application, the magnetoresistive detection component 30 is disposed on the side of the substrate 20 facing away from the shunt body, and no opening is made in the shunt body 10, which effectively avoids the influence of the thermoelectric potential of the copper busbars on both sides of the shunt body on the detection accuracy of the magnetoresistive detection component 30.

[0042] This invention proposes a shunt, comprising: a shunt body 10, a substrate 20, a magnetoresistive detection component 30, and a shielding component 40. The substrate 20 is electrically connected to the shunt body 10. The magnetoresistive detection component 30 is disposed on the substrate 20 and is used to detect the magnetic field generated by the current flowing through the shunt body 10, and output a corresponding magnetic detection signal. The shielding component 40 blocks the magnetoresistive detection component 30 in a first direction to shield interference signals in that direction. This first direction intersects with or is perpendicular to the direction of the current flowing through the shunt body 10. With this configuration, the shunt can detect the magnetic field generated by the current in the shunt body 10 through the magnetoresistive detection component 30, thereby obtaining the corresponding magnetic detection signal. Furthermore, by providing a shielding component 40 in a first direction that intersects or is perpendicular to the current direction of the shunt body 10, the magnetoresistive detection component 30 is blocked in the first direction, thereby shielding the interference signal in the first direction, effectively reducing the influence of the interference signal on the magnetoresistive detection component 30, and thus improving the accuracy of the shunt current detection.

[0043] refer to Figures 1 to 3 In one embodiment, the shunt body 10 includes a current sensing element and a first conductive element and a second conductive element disposed opposite to each other at both ends of the current sensing element, wherein the extending direction of the first conductive element and the second conductive element is the current direction of the shunt body 10; the shielding assembly 40 includes a first shielding element 41, wherein the first shielding element 41 is disposed on at least one side of the substrate 20 in a first direction.

[0044] In this embodiment, the current sensing element is the area where the shunt body 10 is electrically connected to the substrate 20, and is used to acquire a voltage detection signal to calculate the current value flowing through the shunt body 10 using Ohm's law. The first conductive element and the second conductive element are respectively the current input terminal or the current output terminal. Therefore, the extension direction of the first conductive element and the second conductive element is the current direction of the shunt body 10. As can be seen from the above, the shunt body 10 will generate a corresponding magnetic field in the direction perpendicular to its current direction, that is, it will generate a corresponding magnetic field in the first direction, which is also the magnetic field that the magnetoresistive detection component 30 needs to detect. It can be understood that the shielding component 40 needs to shield the interference signal in the first direction. The shielding component 40 is disposed on the substrate 20 and on the same side as the magnetoresistive detection component 30 disposed on the substrate 20. Furthermore, the direction of the interference signal present in the shunt is different under different environments. When the interference signal only comes from one side of the magnetoresistive detection component 30, it is only necessary to provide the first shielding component 41 on the corresponding side of the substrate 20 in the first direction.

[0045] Optionally, the first shielding member 41 is provided on both sides of the substrate 20 in the first direction.

[0046] When the interference signal originates from both sides of the magnetoresistive detection component 30, the substrate 20 needs to be provided with a first shield 41 on both sides in the first direction to shield the interference signal from both sides from affecting the magnetoresistive detection component 30, effectively ensuring the detection of the magnetic field of the current sensing element by the magnetoresistive detection component 30, thereby improving the accuracy of the shunt current detection.

[0047] refer to Figures 1 to 3 In one embodiment, a second shielding member 42 is further provided on the substrate 20, and the second shielding member 42 is disposed on the side of the current sensing member facing away from the substrate 20.

[0048] In this embodiment, the second shield 42, the shunt body 10, and the substrate 20 are arranged sequentially from bottom to top, with the shunt body 10 positioned between the second shield 42 and the substrate 20. The second shield 42 can be connected to the substrate 20 by bending its two sides; alternatively, a connector can be used to connect the second shield 42 to the substrate 20. Furthermore, the width of the second shield 42 needs to be greater than the width of the shunt body 10 so that the shunt body 10 can pass between the second shield 42 and the substrate 20. It is understood that the second shield 42 and the first shield 41 can be made of the same material or different materials, but both must effectively shield against interference signals. The second shield 42 can further reduce the influence of external magnetic fields on the magnetoresistive detection component 30, ensuring the accuracy and reliability of current measurement.

[0049] Optionally, the second shielding member 42 extends along a first direction and is connected to the two first shielding members 41. The two first shielding members 41 may extend along the first direction of the substrate 20, facing the shunt body 10, such that their extension length is greater than the common length of the substrate 20, the current sensing element, and the gap between the substrate 20 and the shunt body 10 in the first direction, thereby connecting to the second shielding member 42. The two first shielding members 41 and the second shielding member 42 may be connected using a connector or a tenon-and-mortise joint structure.

[0050] Optionally, the substrate 20 has two mounting through holes spaced apart in the first direction. Two first shielding members 41 pass through the two mounting through holes one-to-one. A second shielding member 42 is integrally formed with the two first shielding members 41, i.e., a U-shaped shielding assembly 40. The spacing between the two mounting through holes is greater than the length of the current sensing member in the first direction, allowing the current sensing member to pass through the opening formed between the two first shielding members 41, the second shielding member 42, and the substrate 20. This integral configuration allows the shielding assembly 40 to be quickly and stably connected and fixed to the substrate 20, effectively shielding the magnetoresistive detection assembly 30 from interference signals.

[0051] In one embodiment of the present invention, the splitter further includes a housing, and the shielding component 40 is disposed on the housing.

[0052] In this embodiment, the housing disposed on the shunt can be made of metallic materials, such as aluminum or steel; or non-metallic materials, such as plastic or ceramic. The housing needs to have openings provided for the first conductive element, the second conductive element, and the signal output terminal, so that the input and output of current, voltage detection signals, and magnetic detection signals can be achieved through these openings. Furthermore, the shielding component 40 can be fixedly disposed inside the housing. After the current sensing element, the sampling component, and the magnetoresistive detection component 30 are connected and configured, the housing with the pre-installed shielding component 40 can be directly fitted onto the substrate 20 or the current sensing element. Additionally, materials that effectively shield interference signals from the magnetoresistive detection component 30 can be used in the housing in directions intersecting or perpendicular to the current direction flowing through the current sensing element.

[0053] refer to Figure 4 In one embodiment of the present invention, an output interface 50 is provided on the substrate 20, the shunt body 10 is connected to the output interface 50 via the substrate 20, and the magnetoresistive detection component 30 is connected to the output interface 50.

[0054] In this embodiment, the output interface 50 can be electrically connected to an external terminal or main control circuit, so that the voltage detection signal and magnetic detection signal obtained by the shunt are output to the external terminal or main control circuit via the output interface 50. Optionally, the shunt body and the substrate 20 can be electrically connected via sampling lines, so that the voltage detection signal output by the current sensing element in the shunt body can be directly output through the output interface 50 on the substrate; the magnetoresistive detection component 30 can directly connect its output terminal to the output interface 50 on the substrate, or its output terminal can be processed by a signal processing circuit (e.g., a filtering circuit, a signal amplification circuit) and then electrically connected to the output interface 50 on the substrate, so that the magnetic detection signal is output through the output interface 50. Optionally, a corresponding sampling module can also be provided on the substrate. By electrically connecting the input terminal of the sampling module to the current sensing element in the shunt body and the output terminal of the sampling module to the output interface 50, the current sensing element is sampled, and the obtained voltage detection signal is output to the output interface 50, which then outputs to the external terminal or main control circuit, thereby achieving stable signal output.

[0055] This utility model also proposes a new energy vehicle, including a splitter as described in any of the above claims. It is worth noting that since the new energy vehicle of this utility model is based on the aforementioned splitter, the embodiments of the new energy vehicle of this utility model include all the technical solutions of all the aforementioned splitter embodiments, and the achieved technical effects are completely identical, and will not be repeated here.

[0056] This utility model also proposes an energy storage device, including a shunt as described in any of the above claims. It is worth noting that since the energy storage device of this utility model is based on the aforementioned shunt, the embodiments of the energy storage device of this utility model include all the technical solutions of all the aforementioned shunt embodiments, and the achieved technical effects are completely identical, and will not be repeated here.

[0057] 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, The splitter includes: Shunt body; The substrate is electrically connected to the shunt body; A magnetoresistive detection component is disposed on the substrate. The magnetoresistive detection component is used to detect the magnetic field generated by the current flowing through the shunt body and output a corresponding magnetic detection signal. A shielding component is provided, which blocks the magnetoresistive detection component in a first direction to shield interference signals in the first direction, which is either intersecting with or perpendicular to the direction of the current flowing through the shunt body.

2. The shunt as described in claim 1, characterized in that, The shunt body includes a current sensing element and a first conductive element and a second conductive element disposed opposite to each other at both ends of the current sensing element, wherein the extending direction of the first conductive element and the second conductive element is the current direction of the shunt body; the shielding assembly includes a first shielding element, wherein the first shielding element is disposed on at least one side of the substrate in a first direction.

3. The shunt as described in claim 2, characterized in that, The first shielding element is provided on both sides of the substrate in the second direction.

4. The shunt as described in claim 3, characterized in that, A second shielding member is also provided on the substrate, and the second shielding member is positioned on the side of the shunt body facing away from the substrate.

5. The shunt as described in claim 4, characterized in that, The second shielding member extends along the second direction and is connected to the two first shielding members.

6. The shunt as described in claim 5, characterized in that, The substrate has two mounting through holes spaced apart in the first direction. Two first shielding members pass through the two mounting through holes one to one. The second shielding member is integrally formed with the two first shielding members.

7. The shunt as claimed in claim 1, characterized in that, The splitter also includes a housing, and the shielding assembly is disposed on the housing.

8. The shunt as claimed in claim 1, characterized in that, The substrate is provided with an output interface, the shunt body is connected to the output interface via the substrate, and the magnetoresistive detection component is connected to the output interface.

9. A new energy vehicle, characterized in that, Includes the shunt as described in any one of claims 1 to 8.

10. An energy storage device, characterized in that, Includes the shunt as described in any one of claims 1 to 8.

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