High-power high-temperature-resistant NTC thermosensitive resistor
By designing rectangular grooves and arc grooves on the metal layer of the thermistor, the thermistor body is avoided when welding the leads, the damage caused by lead welding is solved and the durability and reliability of the thermistor is improved.
Patent Information
- Application Number
- CN202422289304.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-19
AI Technical Summary
In the prior art, thermistors are prone to damage the surface of the tablet during welding the leads and metal layers, resulting in a degradation in performance and affecting the normal operation of the equipment.
Metal layers are provided on both sides of the thermistor body, and rectangular grooves and arc grooves are opened on the metal layer. The mounting sections and connection sections of the leads are welded in the arc grooves. They are protected by the insulating protective layer and packaging layer to avoid welding damage to the surface of the thermistor body.
It improves the durability and reliability of the thermistor, avoids damage to the thermistor body during welding, and enhances the stability of the equipment.
Smart Images
Figure CN223140484U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of thermistors, and particularly relates to an NTC thermistor with high power and high temperature resistance. Background Art
[0002] A thermistor is a resistor whose resistance value is extremely sensitive to temperature, also called a semiconductor thermistor. By plating a metal layer on the surface of a tablet, welding leads on the metal layer, and wrapping an encapsulation layer outside the leads, a thermistor can be assembled. However, during the welding process of the leads and the metal layer, since the metal layer is plated on the outer surface of the tablet as a very thin layer, it is easy to cause damage to the surface of the tablet, resulting in a decline in the performance of the thermistor. Once the thermistor fails, it will affect the normal operation of the equipment. Content of the Utility Model
[0003] Purpose of the utility model: To provide an NTC thermistor with high power and high temperature resistance, which solves the above problems existing in the prior art.
[0004] Technical solution: An NTC thermistor with high power and high temperature resistance includes a thermistor body. Metal layers are provided on both sides of the thermistor body, and leads are installed on each of the metal layers. An insulating protective layer is wrapped outside the thermistor body, and the insulating protective layer is in surface contact with the edge of the metal layer. An encapsulation layer is provided on the outer wall of the insulating protective layer, and a filling layer is injected between the encapsulation layer and the metal layer. Among them, the lead includes an installation section installed on the metal layer. A connection section is installed near the edge of the metal layer of the installation section, and the connection section extends outside the encapsulation layer. An installation block is installed at the end of the connection section away from the encapsulation layer, and the installation block is perpendicularly connected to the connection section. A hole is provided in the installation block for connecting with an external device.
[0005] Preferably, the metal layer includes a metal sheet, a rectangular groove is provided on the metal sheet, the rectangular groove extends inward along the edge of the metal layer, and an arc-shaped groove that turns outwards along the edge of the rectangular groove is provided at the top of the rectangular groove. The connection section of the lead is installed in the rectangular groove.
[0006] Preferably, the insulating protective layer includes two groups of rings, the rings are arranged outside the metal layer to form a wrap around the metal layer, and annular columns are installed at the edges of the rings. The two ends of the annular columns are respectively connected to the rings to form an annular column to wrap the thermistor body.
[0007] Preferably, the filling layer includes a filling ring, the filling ring is located on the outer wall of the ring, a covering circular plate is installed on the outer wall of the metal layer, and the covering circular plate is integrally formed with the filling ring.
[0008] Preferably, the insulating protective layer is made of glass material.
[0009] Preferably, the filling layer is made of a polymer material.
[0010] Preferably, the encapsulation layer is made of a silicone resin material.
[0011] Beneficial effects: The utility model relates to an NTC thermistor with high power and high temperature resistance. Metal layers are installed on both sides of the thermistor body. By opening rectangular grooves and arc grooves on the metal layers, the lead wires are placed in the rectangular grooves. Through the cooperation of the arc grooves and the lead wires, the welding position of the connection between the metal layer and the lead wire is located in the arc groove, so as to avoid damaging the outer surface of the thermistor body during the welding process, and improve the durability and reliability of the thermistor. Description of the Drawings
[0012] Figure 1 is a schematic diagram of the overall structure of the utility model;
[0013] Figure 2 is an exploded view of the utility model;
[0014] Figure 3 is a sectional view of the whole of the utility model;
[0015] Figure 4 is a schematic diagram of the lead structure of the utility model.
[0016] Figures 1 to 4 In the figures, the reference numerals are: 100, thermistor body; 200, metal layer; 300, lead wire; 400, insulating protective layer; 500, encapsulation layer; 600, filling layer;
[0017] 201, metal sheet; 202, rectangular groove; 203, arc groove;
[0018] 301, installation section; 302, connection section; 303, installation block; 304, hole;
[0019] 401, ring; 402, annular column;
[0020] 601, filling ring; 602, covering circular plate. Detailed Embodiments
[0021] As Figures 1 to 4As shown, the present utility model provides a technical solution: a high-power high-temperature-resistant NTC thermistor, including a thermistor body 100, a metal layer 200, and a lead 300. The metal layer 200 is disposed on both sides of the thermistor body 100. The metal layer 200 includes a metal sheet 201. A rectangular groove 202 is formed in the metal sheet 201. The rectangular groove 202 extends inward along the edge of the metal layer 200. An arc groove 203 that turns outward along the edge of the rectangular groove 202 is formed at the top of the rectangular groove 202. As Figure 2 shown, the lead 300 includes a mounting section 301, a connecting section 302, and a mounting block 303. The mounting section 301 of the lead 300 is mounted in the rectangular groove 202. When the mounting section 301 is mounted by welding, the welding joint is located in the arc groove 203, which can avoid damaging the outer surface of the thermistor body 100 during the welding process, improving the durability and reliability of the thermistor. An insulating protective layer 400 is wrapped outside the thermistor body 100. The insulating protective layer 400 is in surface contact with the edge of the metal layer 200, that is, the insulating protective layer 400 is located between the lead 300 and the thermistor body 100. An encapsulation layer 500 is provided on the outer wall of the insulating protective layer 400. The encapsulation layer 500 is made of silicone resin material. A filling layer 600 is injected between the encapsulation layer 500 and the metal layer 200. The connecting section 302 extends outside the encapsulation layer 500. A mounting block 303 is mounted at the end of the connecting section 302 away from the encapsulation layer 500. The mounting block 303 is perpendicularly connected to the connecting section 302. A hole 304 is formed in the mounting block 303. Through the hole 304 formed in the mounting block 303, the NTC thermistor can be quickly connected to an external device.
[0022] In a further embodiment, the insulating protective layer 400 includes two sets of circular rings 401. The circular rings 401 are disposed outside the metal layer 200 to form a wrap around the metal layer 200. An annular column 402 is mounted at the edge of the circular ring 401. Both ends of the annular column 402 are connected to the circular ring 401 to form the annular column 402, which wraps around the thermistor body 100. Among them, the circular ring 401 and the annular column 402 are integrally formed and wrapped outside the thermistor body 100. Among them, both the circular ring 401 and the annular column 402 are made of glass material.
[0023] In a further embodiment, the filling layer 600 includes a filling ring 601. The filling ring 601 is located on the outer wall of the circular ring 401. A covering circular plate 602 is mounted on the outer wall of the metal layer 200. The covering circular plate 602 is integrally formed with the filling ring 601. The filling layer 600 is made of a polymer material.
[0024] The preferred embodiments of the present utility model have been described in detail above. However, the present utility model is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present utility model, various equivalent transformations can be made to the technical solutions of the present utility model, and these equivalent transformations all fall within the protection scope of the present utility model.
Claims
1. A high-power NTC thermistor resistant to high temperatures, characterized in that, It includes a thermistor body (100). Metal layers (200) are provided on both sides of the thermistor body (100). Leads (300) are installed on each of the metal layers (200). An insulating protective layer (400) is wrapped outside the thermistor body (100). The insulating protective layer (400) is in surface contact with the edge of the metal layer (200). An encapsulation layer (500) is provided on the outer wall of the insulating protective layer (400). A filling layer (600) is injected between the encapsulation layer (500) and the metal layer (200). Among them, the lead (300) includes an installation section (301). The installation section (301) is installed on the metal layer (200). A connection section (302) is installed at the edge of the installation section (301) close to the metal layer (200). The connection section (302) extends outside the encapsulation layer (500). An installation block (303) is installed at the end of the connection section (302) away from the encapsulation layer (500). The installation block (303) is perpendicularly connected to the connection section (302). A hole (304) is provided in the installation block (303). The hole (304) is used for connection with external devices.
2. The high-power and high-temperature-resistant NTC thermistor according to claim 1, wherein The metal layer (200) includes a metal sheet (201). A rectangular groove (202) is provided on the metal sheet (201). The rectangular groove (202) extends inward along the edge of the metal layer (200). An arc groove (203) that turns outward along the edge of the rectangular groove (202) is provided at the top of the rectangular groove (202). The connection section (302) of the lead (300) is installed in the rectangular groove (202).
3. The high-power high-temperature resistant NTC thermistor according to claim 1, characterized in that, The insulating protective layer (400) includes two groups of rings (401). The rings (401) are provided outside the metal layer (200) to wrap the metal layer (200). An annular column (402) is installed at the edge of the ring (401). Both ends of the annular column (402) are respectively connected to the ring (401) to form the annular column (402) to wrap the thermistor body (100).
4. The high-power and high-temperature-resistant NTC thermistor according to claim 3, characterized in that, The filling layer (600) includes a filling ring (601). The filling ring (601) is located on the outer wall of the ring (401). A covering circular plate (602) is installed on the outer wall of the metal layer (200). The covering circular plate (602) is integrally formed with the filling ring (601).
5. The high-power and high-temperature resistant NTC thermistor according to claim 4, wherein The insulating protective layer (400) is made of glass material.
6. The high-power and high-temperature resistant NTC thermistor according to claim 4, wherein, The filling layer (600) is made of polymer material.
7. The high-power and high-temperature-resistant NTC thermistor according to claim 4, wherein, The encapsulation layer (500) is made of silicone resin material.