Thermoelectric compensation resistor and current detection device thereof

Abstract

The application discloses a thermoelectric compensation resistor and a current detection device thereof. The resistor comprises two terminal substrates, a resistance base material embedded between the two terminal substrates, and two compensation elements across the resistance 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 resistance base material. The two compensation elements are used to make the two terminal substrates in the same temperature environment, so as to thermoelectrically compensate the resistance base material between the two terminal substrates. The application forms two parallel compensation elements, can effectively control the contact thermoelectric potential between different terminal substrate materials, realizes thermoelectric compensation, significantly reduces the error caused by the contact thermoelectric potential and the temperature gradient, and improves the measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of resistors, and more specifically to a thermoelectrically compensated resistor and its current detection device. Background Technology

[0002] Because the resistance of a resistor changes with temperature, typically in a linear or near-linear relationship, this means that under the influence of thermoelectric voltage, the resistance of a resistor may change due to variations in its own temperature. When resistors made of different materials are connected in a circuit, temperature differences, especially temperature gradients at the contact points, may create a contact thermoelectric potential, generating an additional thermoelectric voltage in the circuit. This thermoelectric voltage will be superimposed on the actual measured voltage, leading to inaccurate measurement results. This is particularly problematic when measuring very small DC voltages (e.g., microvolts), where high precision (e.g., 16-bit or 0.01% resolution) is required, as thermoelectric voltage interference makes this requirement difficult to achieve.

[0003] Meanwhile, resistors generate heat during operation, and this increased heat further affects the resistor's temperature and resistance. Excessive power consumption can cause the resistor temperature to rise, creating a negative feedback loop that impacts circuit stability.

[0004] Therefore, traditional resistors are not suitable for extreme temperatures or environmental conditions. Because 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, large errors, and failure to meet high precision requirements. Summary of the Invention

[0005] In view of this, the present invention provides a thermoelectrically compensated resistor and its current detection device to solve the problem that the measurement results of existing traditional resistors are not thermoelectrically compensated, resulting in errors and failing to meet the requirements of high-precision measurement.

[0006] This invention provides a thermoelectric compensation resistor, comprising two terminal substrates, a resistor base material embedded between the two terminal substrates, and two compensation elements connected across the resistor base material;

[0007] The first ends of both compensation elements are welded to the first terminal substrate, and the second ends of both compensation elements are welded to the second terminal substrate, and neither compensation element is in contact with the resistive substrate.

[0008] The two compensation elements are used to ensure that the two terminal substrates are in the same temperature environment to provide thermoelectric compensation for the resistive substrate between the two terminal substrates.

[0009] Optionally, both 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 connecting plate is welded to the first terminal substrate, and the second end of the conductive connecting plate is welded to the second terminal substrate; the voltage compensation detection circuit is disposed near the corresponding welding point between the conductive connecting plate and the first terminal substrate.

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

[0012] Neither of the two conductive connecting plates is in contact with the resistive substrate, so that the two terminal substrates are in the same temperature environment to perform thermoelectric compensation on the resistive substrate between the two terminal substrates; the two voltage compensation detection circuits are respectively used to detect the voltage at the corresponding terminal substrate location after the resistive substrate has undergone thermoelectric compensation.

[0013] Optionally, in both of the compensation elements, the conductive connecting plate is specifically a copper plate.

[0014] Optionally, in both compensation elements, the voltage compensation detection circuit includes a first voltage detection terminal and a second voltage detection terminal.

[0015] In the first compensation element, the first voltage detection terminal is disposed 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 disposed on the first terminal substrate and is disposed 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 at the corresponding terminal substrate location after thermoelectric compensation when the circuit is turned on.

[0017] In the second compensation element, the first voltage detection terminal is disposed 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 disposed on the second terminal substrate and is disposed 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 at the corresponding terminal substrate location after thermoelectric compensation when the circuit is turned on.

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

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

[0021] In the first compensation element, the insulating plate is embedded between the first conductive connecting plate and the first terminal substrate; the insulating plate is used to isolate the first conductive connecting 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 both of the compensation elements, the insulating plate is specifically a ceramic plate.

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

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

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

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

[0028] Optionally, both of the terminal substrates are made of copper.

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

[0030] The two voltage measurement components are electrically connected one-to-one with the two compensation elements in the thermoelectric compensation resistor, and are used to collect the voltage generated by the two compensation elements after thermoelectric compensation. Based on the two collected voltages and the resistance corresponding to the resistance base material in the thermoelectric compensation resistor, the current of the thermoelectric compensation resistor after thermoelectric compensation is obtained.

[0031] The beneficial effects of this invention are as follows: The resistor base material is embedded between two terminal substrates to form an integrated resistor substrate. The two compensation elements are connected to the two terminal substrates, bridging the resistor base material without contacting it, forming two parallel compensation elements. These two parallel compensation elements ensure that the two terminal substrates are in the same temperature environment, achieving isothermal detection. This reduces resistance value changes caused by temperature, effectively reducing temperature fluctuations during resistor operation and improving the stability and reliability of the resistor. Simultaneously, isothermal control reduces power consumption and temperature rise caused by excessive power consumption, thus avoiding negative feedback, improving the overall performance of the resistor, and extending its service life. The bridging of the two compensation elements effectively controls the contact thermoelectric potential between different terminal substrate materials, achieving thermoelectric compensation. This significantly reduces errors caused by contact thermoelectric potential and temperature gradients, minimizing thermoelectric effects caused by material mismatch, reducing measurement errors, and improving measurement accuracy. It is suitable for extreme temperature or environmental conditions such as precision measurement of microvolt-level voltages. Attached Figure Description

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

[0033] Figure 1 This figure shows a top view of a thermoelectric compensation resistor according to Embodiment 1 of the present invention;

[0034] Figure 2 This shows a front view structural diagram of a thermoelectric compensation resistor according to Embodiment 1 of the present invention;

[0035] Figure 3 This figure shows a top view of a current detection device according to Embodiment 2 of the present invention;

[0036] Figure 4 The diagram shows a front view of a current detection device according to Embodiment 2 of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Terminal base plate, 2. Resistor base material, 3. Compensation element, 4. External terminal, 5. Voltage measurement assembly, 31. Conductive connection plate, 32. Voltage compensation detection circuit, 33. Insulating plate, 321. First voltage detection terminal, 322. Second voltage detection terminal. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In this embodiment of the invention, the term "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

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

[0042] In this embodiment of the invention, the term "multiple" refers to two or more, and other quantifiers are similar.

[0043] Example 1

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

[0045] The first ends of both compensation elements 3 are welded to the first terminal substrate 1, and the second ends of both compensation elements 3 are welded to the second terminal substrate 1, and neither of the two compensation elements 3 is in contact with the resistor base material 2.

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

[0047] In this embodiment, the resistor base material is embedded between two terminal substrates to form an integrated resistor substrate. Two compensation elements, using the two terminal substrates as substrates, are connected across the resistor base material without contacting it, forming two parallel compensation elements. These two parallel compensation elements ensure that the two terminal substrates are in the same temperature environment, achieving isothermal detection. This reduces resistance value changes caused by temperature, effectively reducing temperature fluctuations during resistor operation and improving resistor stability and reliability. Simultaneously, isothermal control reduces power consumption and temperature rise caused by excessive power consumption, thus avoiding negative feedback, improving overall resistor performance, and extending its lifespan. The connection of the two compensation elements effectively controls the contact thermoelectric potential between different terminal substrate materials, achieving thermoelectric compensation. This significantly reduces errors caused by contact thermoelectric potential and temperature gradients, minimizing thermoelectric effects caused by material mismatch, reducing measurement errors, and improving measurement accuracy. It is suitable for extreme temperature or environmental conditions such as precise measurement of microvolt-level voltages.

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

[0049] Using copper-manganese-nickel alloy as the base material for the resistor results in lower impedance, which effectively improves the conductivity of the material. At the same time, it can further reduce the power consumption in the entire resistor device, reduce the temperature rise caused by excessive power consumption, avoid the formation of negative feedback, improve overall performance, and extend service life.

[0050] Specifically, both of the terminal substrates 1 are made of copper.

[0051] Using copper plate as the terminal substrate can better serve as the resistor substrate for compensation elements, providing better conductivity, thermal conductivity, mechanical properties and corrosion resistance, thus ensuring the thermoelectric compensation effect of the compensation elements.

[0052] Preferably, such as Figure 1 and Figure 2 As shown, both compensation elements 3 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 to the first terminal substrate 1, and the second end of the conductive connecting plate 31 is welded to the second terminal substrate 1; the voltage compensation detection circuit 32 is disposed near the corresponding welding point between the 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 to the first terminal substrate 1, and the second end of the conductive connecting plate 31 is welded to the second terminal substrate 1; the voltage compensation detection circuit 32 is disposed near the welding point between the corresponding conductive connecting plate 31 and the second terminal substrate 1.

[0055] Neither of the two conductive connecting plates 31 is in contact with the resistive substrate 2, so that the two terminal substrates 1 are in the same temperature environment, so as to perform thermoelectric compensation on the resistive substrate 2 between the two terminal substrates 1; the two voltage compensation detection circuits 32 are respectively used to detect the voltage at the corresponding terminal substrate 1 after the resistive substrate 2 has undergone thermoelectric compensation.

[0056] In the two compensation elements, the first end of each of the two conductive connecting plates is welded to the first terminal substrate, and the second end is welded to the second terminal substrate. Neither of them contacts the intermediate resistor base material, which allows them to better bridge the resistor base material. As a "bridge" between the two terminal substrates on both sides of the resistor base material, the two terminal substrates on both sides of the resistor base material are kept in the same temperature environment, significantly reducing the temperature gradient. This avoids the contact thermoelectric potential formed by the temperature gradient, and no additional thermoelectric voltage is generated. This truly achieves the thermoelectric compensation effect, avoids the influence of contact thermoelectric potential on the resistance value of the resistor, and ensures the stability and reliability of the resistance value of the resistor. In the two compensation elements, the first voltage compensation detection circuit is located near the welding point between the first conductive substrate and the first terminal substrate, and the second voltage compensation detection circuit is located near the welding point between the second conductive substrate and the second terminal substrate. These two conductive substrates can be combined to form two parallel structures on the resistor base material. After thermoelectric compensation, voltage detection is achieved at the locations of the terminal substrates on both sides of the resistor base material. The detected voltages represent the voltage of the resistor base material after thermoelectric compensation, exhibiting high accuracy and reliability. This makes it highly suitable for microvolt-level voltage detection, achieving high precision requirements of 16 bits or 0.01% resolution. Based on this reliable voltage, the thermoelectrically compensated resistor of this invention can also be used for high-precision current detection.

[0057] Furthermore, the "bridge" design of the parallel structure mentioned above makes the entire thermoelectric compensation resistor easier to operate and maintain in practical applications. The two parallel structures do not affect each other, allowing for flexible design adjustments, facilitating various tests and calibrations, and providing stronger environmental adaptability.

[0058] Specifically, in both of the compensation elements 3, the conductive connecting plate 31 is specifically a copper plate.

[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 best thermoelectric compensation effect.

[0060] Preferably, such as Figure 1 and Figure 2 As shown, in both 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 disposed 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 disposed on the first terminal substrate 1 and is disposed 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 at the corresponding terminal substrate 1 after thermoelectric compensation when it is turned on.

[0063] In the second compensation element 3, the first voltage detection terminal 321 is disposed at the welding point between the second end of the corresponding conductive connecting plate 31 and the second terminal substrate 1, and the second voltage detection terminal 322 is disposed on the second terminal substrate 1 and is disposed 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 at the corresponding terminal substrate 1 after thermoelectric compensation when it is turned on.

[0065] In the first compensation element, the first voltage detection terminal is located at the welding point between the first conductive connecting plate and the first terminal substrate, and the second voltage detection terminal is located 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 similar, and will not be described in detail 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] By using two voltage detection terminals made of highly conductive copper, the voltage at the locations of the terminal substrates on both sides of the resistor matrix can be detected more accurately, ensuring the accuracy and reliability of the voltage after thermoelectric compensation.

[0068] Preferably, both of the compensation elements 3 further 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 each of the two compensation elements, an insulating plate separates the corresponding conductive connection plate from the corresponding terminal substrate, ensuring that the two compensation elements are truly connected in parallel, with no current flowing between them and no mutual interference. This effectively ensures the thermoelectric compensation effect, making the resistance value of the resistor and subsequent voltage and current detection more reliable, and also effectively improving the flexibility and environmental adaptability of the entire resistor device.

[0072] Specifically, in both of the compensation elements 3, the insulating plate 33 is specifically a ceramic plate.

[0073] The ceramic plate has good insulation properties, which can more effectively isolate the two compensation elements and ensure that no current flows between them; at the same time, the ceramic plate also has high mechanical strength and hardness, which can withstand a certain mechanical pressure and protect the resistive 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, such as Figure 1 and Figure 2 As shown, the thermoelectric compensation resistor also 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, introduce external current, and export internal current when the circuit is turned on.

[0077] By using two external terminals symmetrically arranged on two terminal blocks, the entire resistor can be easily connected to external devices, ensuring that the entire resistor can work properly and thus ensuring its functionality.

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

[0079] The external terminals, made of copper-manganese alloy, ensure stable current transmission between the resistor and external devices, reducing energy loss and signal interference. Simultaneously, these terminals generate less heat, further minimizing the impact of temperature on measurements and improving the overall performance and stability of the resistor. Furthermore, these external terminals possess excellent mechanical strength, wear resistance, and corrosion resistance, protecting the resistor from damage and extending terminal lifespan. In addition, they exhibit good machinability, facilitating processing and connection.

[0080] Example 2

[0081] A current detection device, such as Figure 3 and Figure 4 As shown, it includes the thermoelectric compensation resistor in Embodiment 1, and also includes two voltage measurement components 5;

[0082] The two voltage measuring components 5 are electrically connected one-to-one with the two compensation elements 3 in the thermoelectric compensation resistor, and are used to collect the voltage generated by the two compensation elements 3 after thermoelectric compensation. Based on the two collected voltages and the resistance corresponding to the resistance base material 2 in the thermoelectric compensation resistor, the current of the thermoelectric compensation resistor after thermoelectric compensation is obtained.

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

[0084] Specifically, since both detected voltages can represent the resistor voltage, when obtaining the current in the entire resistor 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 detect the voltage 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 of the two compensation elements respectively, and the other end of the two voltage sensors is electrically connected to the second voltage detection terminal of the two compensation elements respectively.

[0086] Specifically, the two voltage measurement components can also be based on two voltage sensors, each with added modules such as signal conditioning circuits, analog-to-digital converters, controllers, and power supplies. In each voltage measurement component, the power supply provides operating voltage to the controller, voltage sensor, signal conditioning circuit, and analog-to-digital converter. The controller sends control commands to control the operation of the voltage sensor, signal conditioning circuit, and analog-to-digital converter. The signal conditioning circuit processes the voltage signal detected by the voltage sensor (e.g., amplification, filtering), and the analog-to-digital converter converts the processed voltage signal for digital processing and transmission.

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

[0088] The thermoelectric compensation resistor in the current detection device described in this embodiment has the same structure as the thermoelectric compensation resistor described in Embodiment 1. Therefore, for details not covered in this embodiment, please refer to Embodiment 1 and... Figures 1 to 2 The specific details will not be elaborated here.

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

Claims

1. A thermoelectric compensation resistor, characterized in that, It includes two terminal substrates, a resistor base material embedded between the two terminal substrates, and two compensation elements connected across the resistor base material; The first ends of both compensation elements are welded to the first terminal substrate, and the second ends of both compensation elements are welded to the second terminal substrate, and neither compensation element is in contact with the resistive substrate. The two compensation elements are used to ensure that the two terminal substrates are in the same temperature environment, so as to perform thermoelectric compensation on the resistive substrate between the two terminal substrates; Both of the aforementioned compensation elements include a conductive connecting plate and a voltage compensation detection circuit; In the first compensation element, the first end of the conductive connecting plate is welded to the first terminal substrate, and the second end of the conductive connecting plate is welded to the second terminal substrate; the voltage compensation detection circuit is disposed near the corresponding welding point between the conductive connecting plate and the first terminal substrate. In the second compensation element, the first end of the conductive connecting plate is welded to the first terminal substrate, and the second end of the conductive connecting plate is welded to the second terminal substrate; the voltage compensation detection circuit is disposed near the corresponding welding point between the conductive connecting plate and the second terminal substrate. Neither of the two conductive connecting plates is in contact with the resistive substrate, so that the two terminal substrates are in the same temperature environment to perform thermoelectric compensation on the resistive substrate between the two terminal substrates; the two voltage compensation detection circuits are respectively used to detect the voltage at the corresponding terminal substrate location after the resistive substrate has undergone thermoelectric compensation.

2. The thermoelectric compensation resistor according to claim 1, characterized in that, In both of the compensation elements, the conductive connecting plate is specifically a copper plate.

3. The thermoelectric compensation resistor according to claim 1, 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 disposed 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 disposed on the first terminal substrate and is disposed 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 at the corresponding terminal substrate location after thermoelectric compensation when the circuit is turned on. In the second compensation element, the first voltage detection terminal is disposed 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 disposed on the second terminal substrate and is disposed 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 at the corresponding terminal substrate location after thermoelectric compensation when the circuit is turned on.

4. The thermoelectric compensation resistor according to claim 3, characterized in that, In both of the compensation elements, the first voltage detection terminal and the second voltage detection terminal are specifically copper terminals.

5. The thermoelectric compensation resistor according to claim 3, characterized in that, Both of the aforementioned compensation elements also include an insulating plate; In the first compensation element, the insulating plate is embedded between the first conductive connecting plate and the first terminal substrate; the insulating plate is used to isolate the first conductive connecting 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.

6. The thermoelectric compensation resistor according to claim 5, characterized in that, In both of the compensation elements, the insulating plate is specifically a ceramic plate.

7. The thermoelectric compensation resistor according to claim 1, characterized in that, The thermoelectric compensation resistor also includes two external terminals symmetrically arranged on the two terminal substrates; The two external terminals are used to connect external devices, introduce external current, and drain internal current when the circuit is switched on.

8. The thermoelectric compensation resistor according to claim 7, characterized in that, Both of the external terminals are specifically made of manganese-copper alloy.

9. The thermoelectric compensation resistor according to any one of claims 1 to 8, characterized in that, The resistor base material is specifically made of a copper-manganese-nickel alloy.

10. The thermoelectric compensation resistor according to any one of claims 1 to 8, characterized in that, Both of the terminal substrates are made of copper.

11. A current detection device, characterized in that, Includes the thermoelectric compensation resistor as described in any one of claims 1 to 10, and further includes two voltage measuring components; The two voltage measurement components are electrically connected one-to-one with the two compensation elements in the thermoelectric compensation resistor, and are used to collect the voltage generated by the two compensation elements after thermoelectric compensation. Based on the two collected voltages and the resistance corresponding to the resistance base material in the thermoelectric compensation resistor, the current of the thermoelectric compensation resistor after thermoelectric compensation is obtained.

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