Temperature measuring structure of power terminal

Abstract

This utility model discloses a temperature measurement structure for power terminal equipment, including a wiring bracket, wiring terminals, a main circuit board, a temperature measuring plate, and a heat-conducting component. The wiring terminals are mounted on the wiring bracket, and the main circuit board is electrically connected to the wiring terminals. The temperature measuring plate has a temperature measuring circuit and is mounted on the wiring bracket and electrically connected to the main circuit board. The heat-conducting component is installed between the wiring terminals and the temperature measuring plate. By setting the temperature measuring plate independently of the main circuit board and fixing it with the wiring bracket, the temperature measurement structure of the power terminal equipment completely avoids layout changes and EMC degradation caused by adding components to the main circuit board. The heat is quickly and directionally transferred from the wiring terminals to the temperature measuring plate through the heat-conducting component, realizing real-time detection of the wiring terminal temperature. Furthermore, the modular design allows the same temperature measuring plate to be used in different models of power terminal equipment, reducing development and material preparation costs.

Description

Technical Field

[0001] This utility model relates to the field of temperature measurement technology for power terminal equipment, and in particular to a temperature measurement structure for power terminal equipment. Background Technology

[0002] Existing power terminal equipment such as electricity meters and smart converged terminals have extremely limited internal PCB space. Adding temperature sensing circuits directly to these devices would require additional components, forcing adjustments to the PCB layout and, in severe cases, making board placement impossible. Furthermore, the introduction of temperature sensing circuits can negatively impact the original EMC performance of the power terminal equipment, reducing overall reliability and user experience. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a temperature measurement structure for power terminal equipment that can realize real-time monitoring of the terminal temperature of power terminal equipment without changing the original circuit board layout of the power terminal equipment and without affecting the EMC performance.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a temperature measuring structure for power terminal equipment, including...

[0005] Wiring bracket;

[0006] Terminal blocks are mounted on the terminal bracket;

[0007] The main circuit board is electrically connected to the aforementioned wiring terminals;

[0008] A temperature measuring plate, having a temperature measuring circuit, is mounted on the wiring bracket and electrically connected to the main circuit board;

[0009] A heat-conducting component is installed between the wiring terminal and the temperature measuring plate.

[0010] Furthermore, the thermally conductive component is thermally conductive silicone.

[0011] Furthermore, the temperature measuring plate is provided with a power socket, the main circuit board is provided with an electrical connection wire, and the end of the electrical connection wire away from the main circuit board is provided with a power pin, which is inserted into the power socket.

[0012] Furthermore, the temperature measuring plate can be detachably installed on the wiring bracket.

[0013] Furthermore, the temperature measuring plate is mounted to the wiring bracket by screws.

[0014] Furthermore, the temperature measuring plate has a positioning hole, and the wiring bracket has a positioning protrusion that cooperates with the positioning hole.

[0015] Furthermore, the number of positioning holes is multiple, and the number of positioning protrusions is equal to the number of positioning holes.

[0016] Furthermore, the wiring bracket is made of plastic.

[0017] Furthermore, the terminal block is provided with a receiving groove, and the heat-conducting component is installed in the receiving groove.

[0018] The beneficial effects of this utility model are as follows: The temperature measuring structure of the power terminal equipment provided by this utility model completely avoids the layout changes and EMC degradation caused by adding components to the main circuit board by setting the temperature measuring plate independently from the main circuit board and fixing it with the wiring bracket; the heat of the wiring terminal is quickly and directionally transferred to the temperature measuring plate through the heat-conducting component, realizing real-time detection of the temperature of the wiring terminal; and the modular design allows the same temperature measuring plate to be used in power terminal equipment of different models of energy meters and smart converged terminals, reducing development and material preparation costs. Attached Figure Description

[0019] Figure 1 This is an assembly diagram of the temperature measuring structure of the power terminal equipment according to Embodiment 1 of this utility model;

[0020] Figure 2 This is an exploded view of the temperature measurement structure of the power terminal equipment according to Embodiment 1 of this utility model;

[0021] Figure 3 This is a cross-sectional schematic diagram of the temperature measuring structure of the power terminal equipment according to Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of the temperature measuring circuit according to Embodiment 1 of this utility model.

[0023] Label Explanation:

[0024] 1. Wiring bracket; 11. Positioning protrusion; 2. Wiring terminal; 3. Temperature measuring plate; 31. Power socket; 32. Positioning hole; 4. Heat-conducting component; 5. Main circuit board. Detailed Implementation

[0025] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0026] Please refer to Figures 1 to 4 A temperature measurement structure for a power terminal device, comprising:

[0027] Wiring bracket 1;

[0028] Terminal 2 is installed on the terminal bracket 1;

[0029] The main circuit board 5 is electrically connected to the terminal block 2;

[0030] Temperature measuring plate 3 has a temperature measuring circuit. The temperature measuring plate 3 is mounted on the wiring bracket 1 and electrically connected to the main circuit board 5.

[0031] The heat-conducting component 4 is installed between the wiring terminal 2 and the temperature measuring plate 3.

[0032] As can be seen from the above description, the beneficial effects of this utility model are as follows: by setting the temperature measuring plate 3 independently from the main circuit board 5 and fixing it with the wiring bracket 1, the layout changes and EMC degradation caused by adding components to the main circuit board 5 are completely avoided; the heat of the wiring terminal 2 is quickly and directionally transferred to the temperature measuring plate 3 through the heat-conducting component 4, realizing real-time detection of the temperature of the wiring terminal 2; and the modular design allows the same temperature measuring plate 3 to be used in different models of electricity meters, smart converged terminals and other power terminal equipment, reducing development and material preparation costs.

[0033] Furthermore, the heat-conducting component 4 is thermally conductive silicone.

[0034] As described above, thermally conductive silicone can fill the surrounding gaps and significantly reduce contact thermal resistance, while also possessing electrical insulation properties to prevent the high voltage of the terminal 2 from breaking down the temperature measuring plate 3. Furthermore, the elasticity of the silicone can absorb the difference in thermal expansion and contraction between the terminal 2 and the temperature measuring plate 3, thereby improving long-term reliability.

[0035] Furthermore, the temperature measuring plate 3 is provided with a power socket 31, the main circuit board 5 is provided with an electrical connection wire, and the end of the electrical connection wire away from the main circuit board 5 is provided with a power pin, which is inserted into the power socket 31.

[0036] As described above, the plug-in connection between the power socket 31 and the power plug enables a solderless and quick connection between the temperature measuring board 3 and the main circuit board 5, facilitating production assembly and subsequent maintenance and replacement.

[0037] Furthermore, the temperature measuring plate 3 can be detachably installed on the wiring bracket 1.

[0038] As described above, the temperature measuring plate 3 can be disassembled independently. When a fault is found on site, it can be replaced separately without disassembling the whole machine, which significantly shortens the maintenance time, facilitates the separate testing and aging of the parts in the production process, and reduces the scrap rate of the whole meter.

[0039] Furthermore, the temperature measuring plate 3 is mounted to the wiring bracket 1 by screws.

[0040] As can be seen from the above description, the screw fixing structure is simple and low in cost, and can provide a continuous and stable clamping force to ensure long-term effective contact of the heat-conducting component 4. The temperature measuring plate 3 and the wiring bracket 1 are connected by threads, which facilitates automated locking and improves the assembly cycle.

[0041] Furthermore, the temperature measuring plate 3 has a positioning hole 32, and the wiring bracket 1 has a positioning protrusion 11 that cooperates with the positioning hole 32.

[0042] As can be seen from the above description, the positioning hole 32 and the positioning protrusion 11 can ensure that the pre-positioning is completed before the screw is tightened, reducing assembly tooling and improving product yield.

[0043] Furthermore, there are multiple positioning holes 32, and the number of positioning protrusions 11 is equal to the number of positioning holes 32.

[0044] As described above, multi-point positioning can completely constrain the rotational and translational degrees of freedom of the temperature measuring plate 3, prevent displacement caused by transportation vibration or thermal cycling, and also disperse stress, reducing the risk of cracking caused by single-point positioning.

[0045] Furthermore, the wiring bracket 1 is made of plastic.

[0046] As described above, the plastic terminal bracket 1 can be integrally injection molded, which is lightweight, low in cost, and has electrical insulation properties, thus avoiding the short circuit hazards caused by metal brackets.

[0047] Furthermore, the terminal block 2 is provided with a receiving groove, and the heat-conducting component 4 is installed in the receiving groove.

[0048] As can be seen from the above description, the receiving groove can provide mechanical restraint for the heat-conducting component 4 and prevent the heat-conducting component 4 from shifting.

[0049] Please refer to Figures 1 to 4 Embodiment 1 of this utility model is: a temperature measuring structure for a power terminal device, including a wiring bracket 1, a wiring terminal 2, a main circuit board 5, a temperature measuring plate 3, and a heat-conducting component 4; the wiring terminal 2 is installed on the wiring bracket 1, the main circuit board 5 is electrically connected to the wiring terminal 2, the temperature measuring plate 3 has a temperature measuring circuit, the temperature measuring plate 3 is installed on the wiring bracket 1 and electrically connected to the main circuit board 5; the heat-conducting component 4 is installed between the wiring terminal 2 and the temperature measuring plate 3; by setting the temperature measuring plate 3 independently of the main circuit board 5 and fixing it with the wiring bracket 1, the layout change and EMC degradation caused by adding components to the main circuit board 5 are completely avoided; the heat of the wiring terminal 2 is quickly and directionally transferred to the temperature measuring plate 3 through the heat-conducting component 4, realizing real-time detection of the temperature of the wiring terminal 2, and the modular design allows the same temperature measuring plate 3 to be used in different models of electricity meters, smart converged terminals and other power terminal devices, reducing development and material preparation costs.

[0050] Optionally, the thermally conductive component 4 can be thermally conductive silicone, thermally conductive grease, thermally conductive insulating pad, high thermal conductivity ceramic sheet, thermally conductive phase change material, thermally conductive epoxy resin, etc. Specifically, in this embodiment, the thermally conductive component 4 is thermally conductive silicone. Thermally conductive silicone can fill the surrounding gaps, significantly reduce contact thermal resistance, and also has electrical insulation properties to prevent the high voltage of the terminal 2 from breaking down the temperature measuring plate 3. In addition, the elasticity of silicone can absorb the difference in thermal expansion and contraction between the terminal 2 and the temperature measuring plate 3, improving long-term reliability. Furthermore, the thermally conductive silicone is directly adhered to the terminal 2. In addition, a receiving groove (not shown) can be opened on the terminal 2, and the thermally conductive component 4 is installed in the receiving groove. The receiving groove can provide mechanical restraint for the thermally conductive component 4 to prevent the thermally conductive component 4 from shifting.

[0051] Optionally, the terminal bracket 1 can be made of flame-retardant reinforced plastic, thermosetting plastic, ceramic matrix insulator, composite insulating material, or metal parts with an insulating coating on the surface. In this embodiment, the terminal bracket 1 is made of plastic. The plastic terminal bracket 1 can be integrally injection molded, which is lightweight, low-cost, and has electrical insulation properties, thus avoiding the short-circuit hazards caused by metal brackets.

[0052] In this embodiment, the temperature measuring plate 3 is provided with a power socket 31, and the main circuit board 5 is provided with an electrical connection wire. The end of the electrical connection wire away from the main circuit board 5 is provided with a power pin. The power pin is inserted into the power socket 31. The insertion of the power socket 31 and the power pin realizes a solderless and quick connection between the temperature measuring plate 3 and the main circuit board 5, which facilitates production assembly and subsequent maintenance and replacement. Specifically, the temperature measuring plate 3 can be detachably installed on the wiring bracket 1. The temperature measuring plate 3 can be disassembled independently. When a fault is found on site, it can be replaced separately without disassembling the whole machine, which significantly shortens the maintenance time, is beneficial for separate testing and separate aging in the production process, and reduces the scrap rate of the whole meter.

[0053] Optionally, the detachable connection between the temperature measuring plate 3 and the wiring bracket 1 includes, but is not limited to, screw connection, snap-fit ​​connection, and adhesive connection. Specifically, in this embodiment, the temperature measuring plate 3 is installed on the wiring bracket 1 by screws. The screw fixing structure is simple, low-cost, and can provide continuous and stable clamping force to ensure long-term effective contact of the heat-conducting component 4. The temperature measuring plate 3 and the wiring bracket 1 are threaded together, which facilitates automated fastening and improves the assembly cycle. Furthermore, the temperature measuring plate 3 has positioning holes 32, and the wiring bracket 1 has positioning protrusions 11 that cooperate with the positioning holes 32. The cooperation between the positioning holes 32 and the positioning protrusions 11 can ensure that the pre-positioning is completed before the screws are tightened, reducing assembly tooling and improving product yield. Furthermore, there are multiple positioning holes 32, and the number of positioning protrusions 11 is equal to the number of positioning holes 32. Multi-point positioning can completely constrain the rotation and translational freedom of the temperature measuring plate 3, prevent displacement caused by transportation vibration or thermal cycling, and also disperse stress, reducing the risk of cracking caused by single-point positioning.

[0054] For details, please refer to... Figure 4 The temperature measuring circuit includes:

[0055] Transistor Q1;

[0056] Temperature sensing chip 7534SQNR;

[0057] Resistors R1, R2, R3, R4, R5, R6;

[0058] Capacitors C1 and C2.

[0059] The base of transistor Q1 is connected to the DP3 pin of the temperature sensing chip 7534SQNR via resistor R1, and the emitter is connected to the DN pin of the temperature sensing chip 7534SQNR via resistor R2. The collector is shorted to the base. Capacitor C1 is connected in parallel between the right ends of resistors R1 and R2. The THERM, THERM2, SDA, and SCL pins of the temperature sensing chip 7534SQNR are connected to the power supply via resistors R3, R4, R5, and R6, respectively, and grounded via capacitor C2. Additionally, a connection interface is included, which connects the SDA and SCL pins of the temperature sensing chip 7534SQNR to the main control MCU of an energy meter or smart fusion terminal via an IIC bus to achieve real-time temperature data reading.

[0060] Specifically, a specific model of transistor is selected and operated in its amplification region. When heat from the terminals is transferred to transistor Q1 through the thermal silicone, according to the transistor's temperature characteristic curve, the transistor's gain will increase as the ambient temperature rises. This causes a change in the current flowing through R1, resulting in a corresponding change in the voltage across capacitor C1. The 7534SQNR temperature sensing chip detects this voltage change across C1, converts it into temperature data, and stores it in its internal register. The main control MCU of the energy meter or smart fusion terminal can read this temperature data in real time via IIC, achieving the desired temperature measurement effect.

[0061] In summary, the temperature measurement structure of the power terminal equipment provided by this utility model completely avoids layout changes and EMC degradation caused by adding components to the main circuit board by setting the temperature measuring plate independently from the main circuit board and fixing it with the wiring bracket; the heat of the wiring terminal is quickly and directionally transferred to the temperature measuring plate through the heat-conducting component, realizing real-time detection of the temperature of the wiring terminal; and the modular design allows the same temperature measuring plate to be used in different models of electricity meters, smart converged terminals and other power terminal equipment, reducing development and material preparation costs.

[0062] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A temperature measurement structure for a power terminal device, characterized in that, include Wiring bracket; A terminal block is installed on the terminal bracket, and a receiving groove is provided on the terminal block; The main circuit board is electrically connected to the aforementioned wiring terminals; A temperature measuring board with a temperature measuring circuit is mounted on the wiring bracket and electrically connected to the main circuit board. The temperature measuring circuit includes: a transistor Q1; a temperature measuring chip 7534SQNR; resistors R1, R2, R3, R4, R5, and R6; and capacitors C1 and C2. The base of the transistor Q1 is connected to the DP3 pin of the temperature measuring chip 7534SQNR through resistor R1, the emitter is connected to the DN pin of the temperature measuring chip 7534SQNR through resistor R2, and the collector is shorted to the base. A heat-conducting component is installed in the receiving groove and located between the wiring terminal and the temperature measuring plate.

2. The temperature measurement structure of the power terminal equipment according to claim 1, characterized in that, The thermally conductive component is thermally conductive silicone.

3. The temperature measurement structure of the power terminal equipment according to claim 1, characterized in that, The temperature measuring plate is provided with a power socket, the main circuit board is provided with an electrical connection wire, and the end of the electrical connection wire away from the main circuit board is provided with a power pin, which is inserted into the power socket.

4. The temperature measurement structure of the power terminal equipment according to claim 1, characterized in that, The temperature measuring plate can be detachably installed on the wiring bracket.

5. The temperature measurement structure of the power terminal equipment according to claim 4, characterized in that, The temperature measuring plate is mounted to the wiring bracket by screws.

6. The temperature measurement structure of the power terminal equipment according to claim 4 or 5, characterized in that, The temperature measuring plate has a positioning hole, and the wiring bracket has a positioning protrusion that cooperates with the positioning hole.

7. The temperature measurement structure of the power terminal equipment according to claim 6, characterized in that, The number of positioning holes is multiple, and the number of positioning protrusions is equal to the number of positioning holes.

8. The temperature measurement structure of the power terminal equipment according to claim 1, characterized in that, The wiring bracket is made of plastic.

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