Thermoelectric compensation resistor and current detection device thereof

Abstract

The invention discloses a thermoelectric compensation resistor and a current detection device thereof. The resistor comprises two terminal substrates, a resistor base material and two compensation elements, wherein the resistor base material is embedded between the two terminal substrates; the two compensation elements are bridged on the resistor base material; the first ends of the two compensation elements are welded on the first terminal substrate, the second ends of the two compensation elements are welded on the second terminal substrate, and the two compensation elements are not in contact with the resistor base material; and the two compensation elements are used for enabling the two terminal substrates to be in the same temperature environment so as to carry out thermoelectric compensation on the resistor base material between the two terminal substrates. According to the invention, two compensation elements connected in parallel are formed, so that the contact thermoelectric force between different terminal substrate materials can be effectively controlled, thermoelectric compensation is realized, errors caused by the contact thermoelectric force and temperature gradient are remarkably reduced, and the measurement precision is improved.

Description

Technical Field

[0001] The invention relates to the field of resistors, and in particular to a thermoelectric compensation resistor and a current detection device thereof. Background Art

[0002] Since the resistance change of a resistor is affected by temperature, it is usually linear or approximately linear, which means that under the influence of thermoelectric voltage, the resistance of the resistor may change due to changes in its own temperature. When resistors of different materials are connected in a circuit, due to temperature differences, especially when there is a temperature gradient at the contact, a contact thermoelectric potential may be formed, causing additional thermoelectric voltage to be generated in the circuit. This thermoelectric voltage will be superimposed on the actual measured voltage, resulting in inaccurate measurement results. Especially when measuring very small DC voltages (such as microvolts), the system requires high precision (such as 16 bits or 0.01% resolution), and the interference of thermoelectric voltages makes this requirement difficult to achieve.

[0003] At the same time, when the resistor is working, heat is generated, and this heat increase will further affect the temperature and resistance of the resistor. Excessive power consumption may cause the temperature of the resistor to rise, forming a negative feedback and affecting the stability of the circuit.

[0004] Therefore, the current traditional resistors are not suitable for extreme temperatures or environmental conditions. Since the thermoelectric effect generated at the contact points of different materials is not effectively compensated, they are easily affected by environmental changes, resulting in unstable measurement results and large errors, which cannot meet high-precision requirements. Summary of the invention

[0005] In view of this, the present invention provides a thermoelectric compensation resistor and a current detection device thereof to solve the problem that the existing traditional resistors do not perform thermoelectric compensation, resulting in measurement errors and cannot meet high-precision measurement requirements.

[0006] The present invention provides a thermoelectric compensation resistor, comprising two terminal substrates, a resistor matrix embedded between the two terminal substrates, and two compensation elements connected across the resistor matrix;

[0007] The first ends of the two compensation elements are both welded on the first terminal substrate, the second ends of the two compensation elements are both welded on the second terminal substrate, and the two compensation elements are not in contact with the resistor base material;

[0008] The two compensation elements are used to place the two terminal substrates in the same temperature environment, so as to perform thermoelectric compensation on the resistor matrix between the two terminal substrates.

[0009] Optionally, both of the two compensation elements include a conductive connecting plate and a voltage compensation detection circuit;

[0010] In the first compensation element, the first end of the conductive connection plate is welded on the first terminal substrate, and the second end of the conductive connection plate is welded on the second terminal substrate; the voltage compensation detection circuit is arranged near the welding point between the corresponding conductive connection plate and the first terminal substrate;

[0011] In the second compensation element, the first end of the conductive connection plate is welded on the first terminal substrate, and the second end of the conductive connection plate is welded on the second terminal substrate; the voltage compensation detection circuit is arranged near the welding point between the corresponding conductive connection plate and the second terminal substrate;

[0012] The two conductive connecting plates are not in contact with the resistor matrix, and are used to ensure that the two terminal substrates are in the same temperature environment so as to perform thermoelectric compensation on the resistor matrix between the two terminal substrates; the two voltage compensation detection circuits are respectively used to detect the voltage at the corresponding terminal substrate position after the resistor matrix has undergone thermoelectric compensation.

[0013] Optionally, in the two compensation elements, the conductive connecting plates are both specifically copper plates.

[0014] Optionally, in the two compensation elements, the voltage compensation detection circuits each include a first voltage detection terminal and a second voltage detection terminal;

[0015] In the first compensation element, the first voltage detection terminal is arranged at the welding point between the first end of the corresponding conductive connection plate and the first terminal substrate, and the second voltage detection terminal is arranged on the first terminal substrate and close to the first voltage detection terminal;

[0016] In the first compensation element, the first voltage detection terminal is electrically connected to the second voltage detection terminal, and is used to detect the voltage after thermoelectric compensation at the position of the corresponding terminal substrate when turned on;

[0017] In the second compensation element, the first voltage detection terminal is arranged at the welding point between the second end of the corresponding conductive connection plate and the second terminal substrate, and the second voltage detection terminal is arranged on the second terminal substrate and close to the second voltage detection terminal;

[0018] In the second compensation element, the first voltage detection terminal is electrically connected to the second voltage detection terminal, and is used to detect the voltage after thermoelectric compensation at the position of the corresponding terminal substrate when turned on.

[0019] Optionally, in the two compensation elements, the first voltage detection terminal and the second voltage detection terminal are both copper terminals.

[0020] Optionally, the two compensation elements further include an insulating plate;

[0021] In the first compensation element, the insulating plate is embedded between the first conductive connection plate and the first terminal substrate; the insulating plate is used to isolate the first conductive connection plate from the first terminal substrate;

[0022] In the second compensation element, the insulating plate is embedded between the second conductive connecting plate and the second terminal substrate; the insulating plate is used to isolate the second conductive connecting plate from the second terminal substrate.

[0023] Optionally, in the two compensation elements, the insulating plates are both ceramic plates.

[0024] Optionally, the thermoelectric compensation resistor further includes two external terminals symmetrically arranged on the two terminal substrates;

[0025] The two external terminals are used to connect external devices when switched on, to introduce external current, and to export internal current.

[0026] Optionally, the two external terminals are both made of manganese-copper alloy.

[0027] Optionally, the resistor base material is made of copper-manganese-nickel alloy.

[0028] Optionally, the two terminal substrates are both copper plates.

[0029] In addition, the present invention also provides a current detection device, comprising the aforementioned thermoelectric compensation resistor, and also comprising two voltage measurement components;

[0030] The two voltage measurement components are electrically connected to the two compensation elements in the thermoelectric compensation resistor in a one-to-one correspondence, and are used to respectively collect the voltages generated in the two compensation elements after thermoelectric compensation, and obtain the current of the thermoelectric compensation resistor after thermoelectric compensation based on the two collected voltages and the resistance corresponding to the resistor matrix in the thermoelectric compensation resistor.

[0031] The beneficial effects of the present invention are as follows: the resistor matrix is ​​embedded between the two terminal substrates to form an integrated resistor substrate, and the two compensation elements are based on the two terminal substrates as substrates, bridged on the resistor matrix and not in contact with the resistor matrix, and connected to the two terminal substrates to form two parallel compensation elements. The two parallel compensation elements can make the two terminal substrates in the same temperature environment to achieve isothermal detection, thereby reducing the change in resistance value caused by temperature influence, effectively reducing the temperature fluctuation of the resistor during operation, and improving the stability and reliability of the resistor; at the same time, due to isothermal control, power consumption can be reduced, and the temperature rise caused by excessive power consumption can be reduced, thereby avoiding the formation of negative feedback, improving the overall performance of the resistor and extending its service life; through the bridging of the two compensation elements, the contact thermoelectric potential between different terminal substrate materials can be effectively controlled to achieve thermoelectric compensation, significantly reduce the errors caused by contact thermoelectric potential and temperature gradient, and avoid the thermoelectric effect caused by material mismatch to the greatest extent, reduce measurement errors, improve measurement accuracy, and can be suitable for extreme temperature or environmental conditions such as precise measurement of microvolt voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings:

[0033] Figure 1 A top view of a thermoelectric compensation resistor in the first embodiment of the present invention is shown;

[0034] Figure 2 A main structural diagram of a thermoelectric compensation resistor in the first embodiment of the present invention is shown;

[0035] Figure 3 A top view of a current detection device in a second embodiment of the present invention is shown;

[0036] Figure 4 A front view structural diagram of a current detection device in the second embodiment of the present invention is shown.

[0037] Description of reference numerals:

[0038] 1. Terminal substrate, 2. Resistor base material, 3. Compensation element, 4. External terminal, 5. Voltage measurement component, 31. Conductive connecting plate, 32. Voltage compensation detection circuit, 33. Insulating plate, 321. First voltage detection terminal, 322. Second voltage detection terminal. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0040] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0042] In the embodiments of the present invention, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0043] Embodiment 1

[0044] A thermoelectric compensation resistor, such as Figure 1 and Figure 2 As shown, it comprises two terminal substrates 1, a resistor matrix 2 embedded between the two terminal substrates 1, and two compensation elements 3 connected across the resistor matrix 2;

[0045] The first ends of the two compensation elements 3 are both welded on the first terminal substrate 1, the second ends of the two compensation elements 3 are both welded on the second terminal substrate 1, and the two compensation elements 3 are not in contact with the resistor base material 2;

[0046] The two compensation elements 3 are used to make the two terminal substrates 1 be in the same temperature environment, so as to perform thermoelectric compensation on the resistor matrix 2 between the two terminal substrates 1 .

[0047] In this embodiment, the resistor matrix is ​​embedded between the two terminal substrates to form an integrated resistor substrate, and the two compensation elements are connected to the two terminal substrates, which are connected to the resistor matrix without contacting the resistor matrix. The two parallel compensation elements can make the two terminal substrates in the same temperature environment to achieve isothermal detection, thereby reducing the change in resistance value caused by temperature, effectively reducing the temperature fluctuation of the resistor during operation, and improving the stability and reliability of the resistor; at the same time, due to isothermal control, power consumption can be reduced, and the temperature rise caused by excessive power consumption can be reduced, thereby avoiding the formation of negative feedback, improving the overall performance of the resistor and extending its service life; through the bridging of the two compensation elements, the contact thermoelectric potential between different terminal substrate materials can be effectively controlled to achieve thermoelectric compensation, significantly reduce the errors caused by contact thermoelectric potential and temperature gradient, and avoid the thermoelectric effect caused by material mismatch to the greatest extent, reduce measurement errors, improve measurement accuracy, and can be applied to extreme temperature or environmental conditions such as precise measurement of microvolt voltage.

[0048] Specifically, the resistor base material 2 is made of copper-manganese-nickel alloy.

[0049] Copper-manganese-nickel alloy is used as the resistor base material, which has low impedance and can effectively improve the conductivity of the material. At the same time, it can further reduce the power consumption of the entire resistor device, reduce the temperature rise caused by excessive power consumption, avoid the formation of negative feedback, improve the overall performance and extend the service life.

[0050] Specifically, the two terminal substrates 1 are both copper plates.

[0051] Using copper plate as the terminal substrate can better serve as the resistance substrate of the compensation element, and can provide better electrical conductivity, thermal conductivity, mechanical properties and corrosion resistance, ensuring the thermoelectric compensation effect of the compensation element.

[0052] Preferably, if Figure 1 and Figure 2 As shown, the two compensation elements 3 each include a conductive connecting plate 31 and a voltage compensation detection circuit 32;

[0053] In the first compensation element 3, the first end of the conductive connecting plate 31 is welded on the first terminal substrate 1, and the second end of the conductive connecting plate 31 is welded on the second terminal substrate 1; the voltage compensation detection circuit 32 is arranged near the welding point between the corresponding conductive connecting plate 31 and the first terminal substrate 1;

[0054] In the second compensation element 3, the first end of the conductive connecting plate 31 is welded on the first terminal substrate 1, and the second end of the conductive connecting plate 31 is welded on the second terminal substrate 1; the voltage compensation detection circuit 32 is arranged near the welding point between the corresponding conductive connecting plate 31 and the second terminal substrate 1;

[0055] The two conductive connecting plates 31 are not in contact with the resistor matrix 2, and are used to ensure that the two terminal substrates 1 are in the same temperature environment so as to perform thermoelectric compensation on the resistor matrix 2 between the two terminal substrates 1; the two voltage compensation detection circuits 32 are respectively used to detect the voltage at the corresponding position of the terminal substrate 1 after the resistor matrix 2 has undergone thermoelectric compensation.

[0056] In the two compensation elements, the first ends of the two conductive connecting plates are welded to the first terminal substrate, and the second ends are welded to the second terminal substrate, and neither of them contacts the middle resistor mother material, so they can better bridge between the resistor mother materials, serving as a "bridge" between the two terminal substrates on both sides of the resistor mother material. Based on the "bridge", the two terminal substrates on both sides of the resistor mother material can be placed in the same temperature environment, significantly reducing the temperature gradient, thereby avoiding the contact thermoelectric potential formed by the temperature gradient, and no additional thermoelectric voltage is generated, truly realizing the thermoelectric compensation effect, avoiding the influence of the contact thermoelectric potential on the resistance value of the resistor, and ensuring the stability and reliability of the resistance value of the resistor. In the two compensation elements, the first voltage compensation detection circuit is arranged near the welding point between the first conductive substrate and the first terminal substrate, and the second voltage compensation detection circuit is arranged near the welding point between the second conductive substrate and the second terminal substrate. The two conductive substrates can be combined to form two parallel structures on the resistor mother material, and then after the resistor mother material is thermoelectrically compensated, the voltage detection at the positions of the terminal substrates on both sides is realized respectively; wherein the detected voltages all represent the voltage of the resistor mother material after thermoelectric compensation, and have high accuracy and reliability, and are extremely suitable for microvolt voltage detection, reaching the high-precision requirements of 16 bits or 0.01% resolution. Based on this reliable voltage, the thermoelectric compensation resistor of the present invention can also be used for current detection with high-precision requirements.

[0057] In addition, the "bridge" design of the above-mentioned parallel structure can also make the entire thermoelectric compensation resistor easier to operate and maintain in practical applications. The two parallel structures do not affect each other, the design can be flexibly adjusted, and various tests and calibrations are convenient, and the environmental adaptability is stronger.

[0058] Specifically, in the two compensation elements 3 , the conductive connecting plates 31 are both copper plates.

[0059] The conductive connecting plate made of copper can better serve as a "bridge" between the two terminal substrates on both sides of the resistor base material, thereby better reducing the temperature difference between different materials and achieving the optimal thermoelectric compensation effect.

[0060] Preferably, if Figure 1 and Figure 2 As shown, in the two compensation elements 3, the voltage compensation detection circuit 32 includes a first voltage detection terminal 321 and a second voltage detection terminal 322;

[0061] In the first compensation element 3, the first voltage detection terminal 321 is arranged at the welding point between the first end of the corresponding conductive connection plate 31 and the first terminal substrate 1, and the second voltage detection terminal 322 is arranged on the first terminal substrate 1 and close to the first voltage detection terminal 321;

[0062] In the first compensation element 3, the first voltage detection terminal 321 is electrically connected to the second voltage detection terminal 322, and is used to detect the voltage after thermoelectric compensation at the position of the corresponding terminal substrate 1 when connected;

[0063] In the second compensation element 3, the first voltage detection terminal 321 is arranged at the welding point between the second end of the corresponding conductive connection plate 31 and the second terminal substrate 1, and the second voltage detection terminal 322 is arranged on the second terminal substrate 1 and close to the second voltage detection terminal 321;

[0064] In the second compensation element 3 , the first voltage detection terminal 321 is electrically connected to the second voltage detection terminal 322 , and is used to detect the voltage after thermoelectric compensation at the location of the corresponding terminal substrate 1 when connected.

[0065] In the first compensation element, the first voltage detection terminal is arranged at the welding point between the first conductive connecting plate and the first terminal substrate, and the second voltage detection terminal is arranged on the terminal substrate and close to the first voltage detection terminal. Under the premise of thermoelectric compensation, the voltage at the location of the first terminal substrate can be accurately detected by connecting the two voltage detection terminals, and the measurement result is accurate; the two voltage detection terminals on the second compensation element are the same, and will not be repeated here.

[0066] Specifically, in the two compensation elements 3 , the first voltage detection terminal 321 and the second voltage detection terminal 322 are both copper terminals.

[0067] Through the two voltage detection terminals made of highly conductive copper, the voltage at the terminal substrates on both sides of the resistor base material can be detected more accurately, ensuring the accuracy and reliability of the voltage after thermoelectric compensation.

[0068] Preferably, the two compensation elements 3 also include an insulating plate 33;

[0069] In the first compensation element 3, the insulating plate 33 is embedded between the first conductive connecting plate 31 and the first terminal substrate 1; the insulating plate 33 is used to isolate the first conductive connecting plate 31 from the first terminal substrate 1;

[0070] In the second compensation element 3 , the insulating plate 33 is embedded between the second conductive connecting plate 31 and the second terminal substrate 1 ; the insulating plate 33 is used to isolate the second conductive connecting plate 31 from the second terminal substrate 1 .

[0071] In the two compensation elements, the corresponding conductive connecting plate is isolated from the corresponding terminal substrate by an insulating plate respectively, which can ensure that the two compensation elements are a true parallel structure, no current will flow between them, and they will not affect each other, effectively ensuring the thermoelectric compensation effect, making the resistance value of the resistor and the subsequent voltage detection and current detection more reliable, and can also effectively improve the flexibility and environmental adaptability of the entire resistor device.

[0072] Specifically, in the two compensation elements 3 , the insulating plates 33 are both ceramic plates.

[0073] The ceramic plate has good insulation properties and can more effectively isolate the two compensation elements, effectively ensuring that no current flows between them. At the same time, the ceramic plate also has high mechanical strength and hardness, can withstand a certain amount of mechanical pressure, and protect the resistor device from physical damage.

[0074] In other embodiments, the first insulating plate may also be a plastic plate, a silicone plate, or a mixed material plate made of at least two of ceramic, plastic, and silicone.

[0075] Preferably, if Figure 1 and Figure 2 As shown, the thermoelectric compensation resistor further includes two external terminals 4 symmetrically arranged on the two terminal substrates 1;

[0076] The two external terminals 4 are used to connect external devices when switched on, to introduce external current, and to conduct internal current.

[0077] By symmetrically setting two external terminals on the two terminal substrates, it is convenient to connect the entire resistor with external devices, ensuring that the entire resistor can work normally, thereby ensuring its functionality.

[0078] Specifically, the two external terminals 4 are both made of manganese-copper alloy.

[0079] The external terminals made of copper-manganese alloy can ensure the stable transmission of current between the resistor and external devices, reducing energy loss and signal interference; at the same time, the terminals generate less heat, which helps to further avoid the influence of temperature on measurement and improve the overall performance and stability of the entire resistor; the external terminals of this material also have good mechanical strength, wear resistance and corrosion resistance, which can protect the resistor from damage and extend the service life of the terminals; in addition, the external terminals of this material also have good machinability and are easy to process and connect.

[0080] Embodiment 2

[0081] A current detection device, such as Figure 3 and Figure 4 As shown, it includes the thermoelectric compensation resistor in the first embodiment and also includes two voltage measurement components 5;

[0082] The two voltage measuring components 5 are electrically connected to the two compensation elements 3 in the thermoelectric compensation resistor in a one-to-one correspondence, and are used to respectively collect the voltages generated in the two compensation elements 3 after thermoelectric compensation, and obtain the current of the thermoelectric compensation resistor after thermoelectric compensation based on the two collected voltages and the resistance corresponding to the resistor matrix 2 in the thermoelectric compensation resistor.

[0083] In this embodiment, the two voltage measurement components are electrically connected to the two compensation elements respectively. Combined with the thermoelectric compensation effect of the two compensation elements, the voltage detection generated in the two compensation elements after thermoelectric compensation can be realized. Based on the thermoelectric compensation effect of the compensation elements, the two detected voltages can represent the voltage in the resistor matrix, thereby realizing accurate voltage detection; combined with the resistance of the resistor matrix (usually known), accurate current detection can be further realized, which is extremely suitable for microvolt-level precision voltage detection and current detection.

[0084] Specifically, since the two detected voltages can both represent the voltage of the resistor, when the current in the entire resistor is obtained based on the resistance and the two voltages, the average value of the two voltages can be taken as the final resistor voltage, which can further improve the accuracy of voltage detection. Finally, the final current I (i.e., the current of the thermoelectric compensation resistor after thermoelectric compensation) is calculated using the average value of the two voltages and the current calculation formula (i.e., I=U / R, where U is the average value of the two voltages and R is the resistance).

[0085] Specifically, the two voltage measurement components can be two voltage sensors, which are electrically connected to the two compensation elements respectively, and can respectively detect the voltages generated in the two compensation elements after thermoelectric compensation; more specifically, one end of the two voltage sensors is electrically connected to the first voltage detection terminal in the two compensation elements respectively, and the other end of the two voltage sensors is electrically connected to the second voltage detection terminal in the two compensation elements respectively.

[0086] Specifically, the two voltage measurement components can also be based on two voltage sensors, and both of them add modules such as signal conditioning circuit, analog-to-digital converter, controller and power supply. In each voltage measurement component, the power supply is used to provide working voltage for the controller, voltage sensor, signal conditioning circuit, and analog-to-digital converter, the controller is used to send control instructions to control the operation of the voltage sensor, signal conditioning circuit, and analog-to-digital converter, the signal conditioning circuit is used to process the voltage signal detected by the voltage sensor (such as amplification, filtering, etc.), and the analog-to-digital converter is used to convert the processed voltage signal to facilitate digital processing and transmission of the voltage signal.

[0087] The above-mentioned voltage sensor, signal conditioning circuit, analog-to-digital converter, controller, power supply and other modules can all adopt conventional designs, and the specific details are not repeated here.

[0088] The structure of the thermoelectric compensation resistor in the current detection device described in this embodiment is the same as that of the thermoelectric compensation resistor described in Example 1. Therefore, for details not provided in this embodiment, please refer to Example 1 and Example 2. Figure 1 to Figure 2 The detailed description will not be repeated here.

[0089] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A thermoelectric compensation resistor, characterized in that: It comprises two terminal substrates, a resistor matrix embedded between the two terminal substrates, and two compensation elements connected across the resistor matrix; The first ends of the two compensation elements are both welded on the first terminal substrate, the second ends of the two compensation elements are both welded on the second terminal substrate, and the two compensation elements are not in contact with the resistor base material; The two compensation elements are used to place the two terminal substrates in the same temperature environment, so as to perform thermoelectric compensation on the resistor matrix between the two terminal substrates.

2. The thermoelectric compensation resistor according to claim 1, characterized in that: Both of the compensation elements include a conductive connecting plate and a voltage compensation detection circuit; In the first compensation element, the first end of the conductive connection plate is welded on the first terminal substrate, and the second end of the conductive connection plate is welded on the second terminal substrate; the voltage compensation detection circuit is arranged near the welding point between the corresponding conductive connection plate and the first terminal substrate; In the second compensation element, the first end of the conductive connection plate is welded on the first terminal substrate, and the second end of the conductive connection plate is welded on the second terminal substrate; the voltage compensation detection circuit is arranged near the welding point between the corresponding conductive connection plate and the second terminal substrate; The two conductive connecting plates are not in contact with the resistor matrix, and are used to ensure that the two terminal substrates are in the same temperature environment so as to perform thermoelectric compensation on the resistor matrix between the two terminal substrates; the two voltage compensation detection circuits are respectively used to detect the voltage at the corresponding terminal substrate position after the resistor matrix has undergone thermoelectric compensation.

3. The thermoelectric compensation resistor according to claim 2, characterized in that: In the two compensation elements, the conductive connecting plates are both specifically copper plates.

4. The thermoelectric compensation resistor according to claim 2, characterized in that: In both of the compensation elements, the voltage compensation detection circuit includes a first voltage detection terminal and a second voltage detection terminal; In the first compensation element, the first voltage detection terminal is arranged at the welding point between the first end of the corresponding conductive connection plate and the first terminal substrate, and the second voltage detection terminal is arranged on the first terminal substrate and close to the first voltage detection terminal; In the first compensation element, the first voltage detection terminal is electrically connected to the second voltage detection terminal, and is used to detect the voltage after thermoelectric compensation at the position of the corresponding terminal substrate when turned on; In the second compensation element, the first voltage detection terminal is arranged at the welding point between the second end of the corresponding conductive connection plate and the second terminal substrate, and the second voltage detection terminal is arranged on the second terminal substrate and close to the second voltage detection terminal; In the second compensation element, the first voltage detection terminal is electrically connected to the second voltage detection terminal, and is used to detect the voltage after thermoelectric compensation at the position of the corresponding terminal substrate when turned on.

5. The thermoelectric compensation resistor according to claim 4, characterized in that: In the two compensation elements, the first voltage detection terminal and the second voltage detection terminal are both copper terminals.

6. The thermoelectric compensation resistor according to claim 4, characterized in that: Both of the compensating elements further include an insulating plate; In the first compensation element, the insulating plate is embedded between the first conductive connection plate and the first terminal substrate; the insulating plate is used to isolate the first conductive connection plate from the first terminal substrate; In the second compensation element, the insulating plate is embedded between the second conductive connecting plate and the second terminal substrate; the insulating plate is used to isolate the second conductive connecting plate from the second terminal substrate.

7. The thermoelectric compensation resistor according to claim 6, characterized in that: In the two compensation elements, the insulating plates are both specifically ceramic plates.

8. The thermoelectric compensation resistor according to claim 1, characterized in that: The thermoelectric compensation resistor further includes two external terminals symmetrically arranged on the two terminal substrates; The two external terminals are used to connect external devices when switched on, to introduce external current, and to export internal current.

9. The thermoelectric compensation resistor according to claim 8, characterized in that: The two external terminals are both made of manganese-copper alloy.

10. The thermoelectric compensation resistor according to any one of claims 1 to 9, characterized in that: The resistor base material is specifically made of copper-manganese-nickel alloy.

11. The thermoelectric compensation resistor according to any one of claims 1 to 9, characterized in that: The two terminal substrates are both copper plates.

12. A current detection device, characterized in that: comprising the thermoelectric compensation resistor as claimed in any one of claims 1 to 11, further comprising two voltage measurement components; The two voltage measurement components are electrically connected to the two compensation elements in the thermoelectric compensation resistor in a one-to-one correspondence, and are used to respectively collect the voltages generated in the two compensation elements after thermoelectric compensation, and obtain the current of the thermoelectric compensation resistor after thermoelectric compensation based on the two collected voltages and the resistance corresponding to the resistor matrix in the thermoelectric compensation resistor.

Images