NTC (Negative Temperature Coefficient) temperature sensor for new energy automobile thermal management system

Abstract

The invention relates to the technical field of temperature sensors, and discloses an NTC (Negative Temperature Coefficient) temperature sensor for a new energy automobile thermal management system, which comprises a temperature sensing probe body penetrating through a cooling box and extending into the cooling box, and the threaded column is in threaded connection with the interior of the cooling box, and the end part of the threaded column is coaxially fixed with the end part of the temperature sensing probe body. The NTC temperature sensor for the new energy automobile thermal management system can effectively solve the technical problems that in the prior art, when a cooling liquid temperature sensor is installed, a screwdriver and other tools are usually adopted to tighten the sensor, a sealing piece is used for sealing the sensor, and vibration is continuously generated in the automobile using process, so that the temperature of the cooling liquid temperature sensor cannot be influenced. However, long-time vibration may cause abrasion or deformation of a sealing element, so that the sealing performance of the sealing element is reduced, vibration may also cause loosening of connection between the sensor and a cooling system or other parts, and both may cause the problem that cooling liquid leaks to the outside of the sensor.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature sensors, and particularly to an NTC temperature sensor for a new energy vehicle thermal management system. Background Art

[0002] NTC temperature sensors are widely used in the automotive industry, including coolant temperature sensors, intake air temperature sensors, ambient temperature sensors, etc. Automotive coolant temperature sensors usually use NTC thermistors as temperature-sensing elements. Therefore, it can be considered that automotive coolant temperature sensors are a specific application of NTC temperature sensors in the automotive field.

[0003] The main components of an automotive coolant temperature sensor mainly include: a temperature-sensing element responsible for sensing the temperature of the coolant, a housing for protecting the temperature-sensing element from mechanical damage and environmental pollution, a seal (such as an O-ring or a sealing gasket) for ensuring the sealing between the sensor and the cooling system, a connector for electrically connecting the sensor to the engine control unit (ECU) or other electronic components, and a wire for transmitting the electrical signal generated by the temperature-sensing element to the ECU. When installing the coolant temperature sensor, tools such as a screwdriver are usually used to tighten the sensor (do not apply excessive force to avoid damaging the threads or the sealing surface), and a seal is used to seal it. Due to continuous vibrations during vehicle use, however, long-term vibrations may cause the seal to wear or deform, thus reducing its sealing performance. Vibrations may also cause the connection between the sensor and the cooling system or other components to become loose. Both of these can cause coolant to leak outside the sensor, resulting in electrical components getting damp or corroded, and thus affecting the accuracy and reliability of the sensor. Summary of the Invention

[0004] In view of the above-mentioned drawbacks of the prior art, the present invention provides an NTC temperature sensor for a new energy vehicle thermal management system, which can effectively solve the problems in the prior art that when installing a coolant temperature sensor, tools such as a screwdriver are usually used to tighten the sensor, and a seal is used to seal it. Due to continuous vibrations during vehicle use, long-term vibrations may cause the seal to wear or deform, thus reducing its sealing performance. Vibrations may also cause the connection between the sensor and the cooling system or other components to become loose, and both of these can cause coolant to leak outside the sensor.

[0005] To achieve the above object, the present invention is realized through the following technical solutions:

[0006] The present invention provides an NTC temperature sensor for a new energy vehicle thermal management system, including:

[0007] A temperature-sensing probe body that penetrates through the cooling tank and extends into the cooling tank;

[0008] A threaded post that is threadedly connected to the inside of the cooling box. The end of the threaded post is coaxially fixed to the end of the temperature sensing probe body. A connector connected to the engine control unit is fixedly connected to the end of the threaded post away from the temperature sensing probe body;

[0009] Wherein, a hexagonal head that is hermetically fitted to the outside of the cooling box is fixedly connected to the circumferential outer surface of the threaded post;

[0010] Wherein, an inner seal member that is hermetically fitted to the inside of the cooling box is sleeved on the circumferential outer surface of the temperature sensing probe body. The connector is threadedly connected with a locking device that can be used to adjust the position of the inner seal member through a threaded hole opened in its interior, and the threaded rotation direction of this locking device is opposite to the threaded rotation direction of the threaded post.

[0011] Further, a sliding hole and a sealing cavity are respectively opened inside the threaded post, and the sealing cavity is located in the middle of the sliding hole and is connected to it. An internal groove that is connected to the inside of the sliding hole is opened inside the temperature sensing probe body. An internal hole that is connected to the inside of the sliding hole is opened inside the connector. The central axes of the sliding hole, the sealing cavity, the internal hole, and the threaded hole coincide.

[0012] Further, the inner seal member includes an annular block that slides on the circumferential outer surface of the temperature sensing probe body. A lining block that slides on the inner wall of the internal groove is fixedly connected to the inner side of the annular block. An annular baffle with the same diameter as the threaded post is fixedly connected to the side of the annular block away from the hexagonal head. A sealing ring block that fits against the side surface of the annular baffle is sleeved on the circumferential outer surface of the annular block. A circular groove is opened on the side of the annular block away from the annular baffle, and a strong spring connected to the outer end of the threaded post is provided on the inner wall of this circular groove.

[0013] Further, the locking device includes a sliding rod that slides on the inner wall of the sliding hole. One end of the sliding rod close to the temperature sensing probe body is fixedly connected to the inside of the lining block. A piston plate that seals and slides on the inner wall of the sealing cavity is fixedly connected to the circumferential outer surface of the sliding rod. A locking rod that is threadedly connected to the threaded hole is rotatably connected to the end of the sliding rod away from the lining block, and the threaded rotation direction of this locking rod is opposite to the threaded rotation direction of the threaded post.

[0014] Further, an elastic ring plate is nested and installed inside the sealing ring block. A pulling plate that is rotatably installed on the inner side of the elastic ring plate is slidably connected inside the annular block. A magnetic plate is fixedly connected to the side of the pulling plate away from the elastic ring plate, and a micro spring connected to the inside of the annular block is provided on the side of this magnetic plate close to the pulling plate.

[0015] Further, a magnetic block magnetically connected to the magnetic plate is provided on the circumferential outer surface of the temperature sensing probe body. In the initial state, the magnetic plate and the magnetic block are in a magnetically attracted state with each other, and the diameter of the space enclosed by the sealing ring block is smaller than the diameter of the annular baffle.

[0016] Further, a T-shaped plate engaged with the inside of the sealing ring block is fixedly connected to the side of the elastic ring plate away from the pulling plate, and the elastic ring plate and the T-shaped plate are integrally formed.

[0017] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0018] The present invention is provided with an inner seal and a locking device. By rotating the hexagonal head clockwise with a screwdriver (a sealing washer is installed on the side of the hexagonal head close to the cooling box), the temperature sensing probe body extends into the interior of the cooling box, and the hexagonal head is continuously rotated until the hexagonal head drives the threaded column to be hermetically locked with the threaded mounting hole of the cooling box, completing the outer sealing and locking of the NTC temperature sensor of the present invention. Fix the hexagonal head with one screwdriver, and rotate the locking rod on the locking device counterclockwise with another screwdriver, driving the piston plate, the sliding rod, the inner lining block, the annular baffle, etc. to move synchronously towards the connector side. The annular block slides along the circumferential outer surface of the temperature sensing probe body, driving the magnetic plate to disengage from the magnetic block, and the pulling plate and the magnetic plate quickly reset, and jointly act with the elastic force of the elastic ring plate and the sealing ring block to realize the quick reset of the elastic ring plate and the sealing ring block. With the further rotation of the locking rod, the piston plate is hermetically locked inside the sealing cavity. At the same time, the annular baffle drives the sealing ring block to closely fit on the threaded mounting hole on the inner side of the cooling box, realizing the inner sealing and locking of the NTC temperature sensor. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0020] Figure 1 It is a three-dimensional combined structure schematic diagram of the coolant temperature sensor and the cooling box in the embodiment of the present invention;

[0021] Figure 2 It is a three-dimensional structure schematic diagram of the coolant temperature sensor in the embodiment of the present invention;

[0022] Figure 3 It is a three-dimensional partial sectional structure schematic diagram of the temperature sensing probe body, the threaded column and the connector in the embodiment of the present invention;

[0023] Figure 4 Schematic structural diagram of a three-dimensional partial section of a threaded post and a connector according to an embodiment of the present invention;

[0024] Figure 5 Schematic structural diagram of a three-dimensional partial section of a sliding rod and a temperature sensing probe body according to an embodiment of the present invention;

[0025] Figure 6 Schematic front view structural diagram of an inner seal according to an embodiment of the present invention;

[0026] Figure 7 Schematic structural diagram of the three-dimensional state transformation of a sealing ring block according to an embodiment of the present invention;

[0027] Figure 8 Schematic structural diagram of a three-dimensional partial section of an annular block according to an embodiment of the present invention;

[0028] Figure 9 Schematic three-dimensional structural diagram of a pulling plate, a magnetic plate, a micro spring, an elastic ring plate, and a T-shaped plate according to an embodiment of the present invention;

[0029] Figure 10 According to an embodiment of the present invention Figure 8 Schematic enlarged partial structure diagram at location A in the figure.

[0030] The reference numerals in the figure respectively represent: 1, temperature sensing probe body; 11, built-in groove; 12, magnetic block; 2, threaded post; 20, hexagonal head; 21, sliding hole; 22, sealing cavity; 3, connector; 31, built-in hole; 4, inner seal; 41, annular block; 411, circular groove; 412, strong spring; 413, pulling plate; 414, magnetic plate; 415, micro spring; 42, lining block; 43, annular baffle; 44, sealing ring block; 441, elastic ring plate; 442, T-shaped plate; 5, lock; 51, sliding rod; 52, piston plate; 53, locking rod. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] The present invention will be further described below with reference to the embodiments.

[0033] Embodiment:

[0034] Please refer to Figures 1 - 10, the present invention provides a technical solution: an NTC temperature sensor for a new energy vehicle thermal management system, comprising:

[0035] a temperature sensing probe body 1 penetrating through the cooling box and extending into the cooling box;

[0036] a threaded post 2 threadedly connected to the inside of the cooling box, the end of the threaded post 2 is coaxially fixed to the end of the temperature sensing probe body 1, and a connector 3 connected to the engine control unit is fixedly connected to one end of the threaded post 2 away from the temperature sensing probe body 1;

[0037] wherein, a hexagonal head 20 is fixedly connected to the outer circumferential surface of the threaded post 2 and is sealingly fitted to the outside of the cooling box;

[0038] wherein, an inner sealing member 4 is sleeved on the outer circumferential surface of the temperature sensing probe body 1 and is sealingly fitted to the inside of the cooling box, the connector 3 is threadedly connected with a locking device 5 through a threaded hole opened in it, and the threaded rotation direction of the locking device 5 is opposite to the threaded rotation direction of the threaded post 2.

[0039] A sliding hole 21 and a sealing cavity 22 are respectively opened in the threaded post 2, and the sealing cavity 22 is located in the middle of the sliding hole 21 and is communicated with it. An internal groove 11 communicated with the inside of the sliding hole 21 is opened in the temperature sensing probe body 1, an internal hole 31 communicated with the inside of the sliding hole 21 is opened in the connector 3, and the central axes of the sliding hole 21, the sealing cavity 22, the internal hole 31 and the threaded hole coincide.

[0040] The inner sealing member 4 includes an annular block 41 slidable on the outer circumferential surface of the temperature sensing probe body 1. An inner lining block 42 slidable on the inner wall of the internal groove 11 is fixedly connected to the inner side of the annular block 41. An annular baffle 43 having the same diameter as the threaded post 2 is fixedly connected to one side of the annular block 41 away from the hexagonal head 20. A sealing ring block 44 is sleeved on the outer circumferential surface of the annular block 41 and is fitted to the side surface of the annular baffle 43. A circular groove 411 is opened on one side of the annular block 41 away from the annular baffle 43, and a strong spring 412 connected to the outer end of the threaded post 2 is provided on the inner wall of the circular groove 411.

[0041] The locking device 5 includes a sliding rod 51 slidable on the inner wall of the sliding hole 21. One end of the sliding rod 51 close to the temperature sensing probe body 1 is fixedly connected to the inside of the inner lining block 42. A piston plate 52 sealingly slidable on the inner wall of the sealing cavity 22 is fixedly connected to the outer circumferential surface of the sliding rod 51. One end of the sliding rod 51 away from the inner lining block 42 is rotatably connected to a locking rod 53 threadedly connected to the threaded hole, and the threaded rotation direction of the locking rod 53 is opposite to the threaded rotation direction of the threaded post 2.

[0042] An elastic ring plate 441 is nested and installed inside the sealing ring block 44. A pulling plate 413 that is rotatably installed on the inner side of the elastic ring plate 441 is slidably connected inside the annular block 41. A magnetic plate 414 is fixedly connected to the side of the pulling plate 413 away from the elastic ring plate 441, and a micro spring 415 connected to the inside of the annular block 41 is arranged on the side of the magnetic plate 414 close to the pulling plate 413.

[0043] A magnetic block 12 magnetically connected to the magnetic plate 414 is arranged on the circumferential outer surface of the temperature sensing probe body 1. In the initial state, the magnetic plate 414 and the magnetic block 12 are in a state of magnetic attraction with each other, and the diameter of the space enclosed by the sealing ring block 44 is smaller than the diameter of the annular baffle 43.

[0044] A T-shaped plate 442 that is engaged with the inside of the sealing ring block 44 is fixedly connected to the side of the elastic ring plate 441 away from the pulling plate 413. The elastic ring plate 441 and the T-shaped plate 442 are integrally formed.

[0045] Reference Figures 1 - 10 , during the use of the vehicle, vibrations are continuously generated. However, long-term vibrations may cause wear or deformation of the seal, thereby reducing its sealing performance. Vibrations may also cause the connection between the sensor and the cooling system or other components to become loose. Both will cause the coolant to leak outside the sensor, resulting in the electrical components being affected by moisture or corrosion, and further affecting the accuracy and reliability of the sensor;

[0046] To overcome the above-mentioned defects, the present invention designs an NTC temperature sensor for a new energy vehicle thermal management system.

[0047] Conventional installation method:

[0048] Ensure that the vehicle is in the off state and the engine has cooled down; then align the temperature sensing probe body 1 with the internal threaded installation hole in the cooling tank. Subsequently, rotate the hexagon head 20 clockwise with a screwdriver (a sealing washer is installed on the side of the hexagon head 20 close to the cooling tank), the temperature sensing probe body 1 extends into the inside of the cooling tank, and continuously rotate the hexagon head 20 (do not apply excessive force to avoid damaging the thread or the sealing surface) until the hexagon head 20 drives the threaded post 2 to be tightly sealed with the threaded installation hole in the cooling tank, completing the outer sealing and locking of the NTC temperature sensor of the present invention.

[0049] Two-way sealing method:

[0050] In order to further improve the sealing performance of the NTC temperature sensor of the present invention, the present invention is also provided with an inner seal 4 and a locking device 5. It should be emphasized that in the initial state, under the elastic force of the strong spring 412, the annular block 41 on the inner seal 4 drives the inner lining block 42 to slide along the inner wall of the built-in groove 11 to the farthest position (at this time, the distance between the annular baffle 43 and the outer end of the threaded post 2 is maximized). At the same time, the magnetic plate 414 slides to the corresponding position of the magnetic block 12. Under the magnetic force of the magnetic block 12, the magnetic plate 414 drives the pulling plate 413 to slide a short distance along the inside of the annular block 41 towards the central axis direction of the sliding rod 51 (the micro spring 415 is compressed and elastically deformed) until the magnetic plate 414 and the magnetic block 12 are attached together. In the present invention, there are a total of six groups of magnetic plates 414, and the six groups slide a short distance synchronously towards the central axis direction of the sliding rod 51. Under the uniform pulling force, the elastic ring plate 441 undergoes elastic deformation as a whole, driving the sealing ring block 44 to undergo elastic deformation. As a result, the space enclosed by the sealing ring block 44 becomes smaller (the "space diameter" enclosed by the sealing ring block 44 is smaller than the diameter of the annular baffle 43), avoiding interference between the sealing ring block 44 and the internal threaded mounting hole of the cooling box when the NTC temperature sensor is normally installed and affecting the rapid insertion of the sealing ring block 44.

[0051] As can be seen from the above, when the inner seal 4 follows the temperature sensing probe body 1 into the inside of the cooling box, the outer seal and locking of the NTC temperature sensor of the present invention can be achieved by rotating the hexagonal head 20. Then, fix the hexagonal head 20 with one screwdriver, and use another screwdriver to rotate the locking rod 53 on the locking device 5 counterclockwise, driving the piston plate 52, the sliding rod 51, the inner lining block 42, the annular baffle 43, etc. to move synchronously towards the connector 3 side. The annular block 41 slides along the circumferential outer surface of the temperature sensing probe body 1, driving the magnetic plate 414 to disengage from the magnetic block 12. Under the elastic force of the micro spring 415, the pulling plate 413 and the magnetic plate 414 are quickly reset. With the combined action of the elastic force of the elastic ring plate 441 and the sealing ring block 44, the elastic ring plate 441 and the sealing ring block 44 are quickly reset. The diameter of the circular space enclosed by the reset sealing ring block 44 is larger than the diameter of the annular baffle 43. As the locking rod 53 is further rotated, the piston plate 52 is sealed and locked inside the sealing cavity 22. At the same time, the annular baffle 43 drives the sealing ring block 44 to closely fit on the internal threaded mounting hole on the inner side of the cooling box, achieving the inner seal and locking of the NTC temperature sensor. In summary, through the clockwise rotation of the hexagonal head 20 and the counterclockwise rotation of the locking rod 53, the two-way seal of the NTC temperature sensor can be achieved through their combined action.

[0052] The present invention is provided with an inner seal 4 and a locking device 5, and the cooperation between the two has the following advantages:

[0053] Advantage 1: First, the hexagonal head 20 rotates clockwise to drive the threaded column 2 to be tightly sealed and locked with the threaded mounting hole of the cooling box. Then, by rotating the locking rod 53 counterclockwise (the locking rod 53 rotates around the outer end of the sliding rod 51), an outward lateral pulling force is generated on the sliding rod 51 and acts on the annular baffle 43. After reset, the sealing ring block 44 fits tightly on the threaded mounting hole inside the cooling box. The combined action of the two can achieve the double-sided sealing of the NTC temperature sensor.

[0054] Advantage 2: Since the thread rotation direction of the locking rod 53 is opposite to that of the threaded column 2, after the double-sided sealed installation of the NTC temperature sensor, under the action of the sealing ring block 44, the connector 3 and the locking rod 53 are combined into a whole (the two are locked by a long thread). When external vibration force is transmitted to components such as the connector 3 and the hexagonal head 20, the connector 3 has a reverse rotation tendency, and drives the locking rod 53 to also have a reverse rotation tendency. Since the locking rod 53 has been sealed and locked with the sealing ring block 44 when it is initially locked, the locking rod 53 cannot rotate further counterclockwise, thus overcoming the reverse loosening of the connector 3. Similarly, the locking rod 53 cannot achieve clockwise loosening either.

[0055] Advantage 3: Through the cooperation of the magnetic plate 414 and the magnetic block 12, the present invention realizes the scaling change of the space range enclosed by the sealing ring block 44. Specifically, during the initial installation, in order to facilitate the rapid passing of the sealing ring block 44 through the internal threaded mounting hole of the cooling box, the sealing ring block 44 is in a uniformly contracted state as a whole. When the sealing ring block 44 needs to seal the inner threaded mounting hole of the cooling box (- if the inner side is not sealed, the sealing ring block 44 will remain in the contracted state, which is convenient for subsequent replacement and disassembly), the sealing ring block 44 as a whole starts to reset, and the "enlarged sealing ring block 44" fits tightly with the outer end of the inner threaded mounting hole of the cooling box.

[0056] Advantage 4: The elastic ring plate 441 is nested and installed inside the sealing ring block 44, and the central axis of the elastic ring plate 441 after reset coincides with the central axis of the sealing ring block 44. When the annular baffle 43 acts on the sealing ring block 44 to closely fit the inner threaded mounting hole of the cooling box, the sealing ring block 44 is prone to elastic deformation, affecting the overall sealing performance of the sealing ring block 44 (First, the space enclosed by the sealing ring block 44 after reset is larger than the space enclosed by the annular baffle 43. Second, for the sealing ring block 44 overflowing outside the annular baffle 43, the elastic ring plate 441 cannot provide a stable acting force). In response to this, the present invention also provides a T-shaped plate 442, and the elastic ring plate 441 and the T-shaped plate 442 are integrally formed. The T-shaped plate 442 is vertically distributed on the circumferential outer surface of the elastic ring plate 441. First, when the elastic ring plate 441 undergoes elastic deformation, the T-shaped plates 442 do not interfere with the elastic deformation of the elastic ring plate 441. Second, the T-shaped plate 442 is parallel to the force direction of the sealing ring block 44 and can provide sufficient supporting force to maintain the stability of the sealing ring block 44 and prevent the outer periphery of the sealing ring block 44 from being compressed and deformed, affecting the sealing performance inside the threaded mounting hole.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An NTC temperature sensor for a new energy vehicle thermal management system, characterized in that: include: A temperature sensing probe body (1) that penetrates the cooling box and extends into the cooling box; A threaded column (2) connected to the inner thread of the cooling box, the end of the threaded column (2) being coaxially fixed to the end of the temperature sensing probe body (1), and the end of the threaded column (2) away from the temperature sensing probe body (1) being fixedly connected to a connector (3) connected to the engine control unit; Wherein, the outer circumferential surface of the threaded column (2) is fixedly connected with a hexagonal head (20) which is sealed and fitted with the outer side of the cooling box; The outer circumferential surface of the temperature sensing probe body (1) is sleeved with an inner seal (4) which is sealed with the inner side of the cooling box, and the connector (3) is threadedly connected to a locker (5) which can be used to adjust the position of the inner seal (4) through a threaded hole provided inside the connector (3), and the thread rotation direction of the locker (5) is opposite to the thread rotation direction of the threaded column (2).

2. The NTC temperature sensor for a new energy vehicle thermal management system according to claim 1, characterized in that: The threaded column (2) is provided with a sliding hole (21) and a sealing cavity (22) in its interior, and the sealing cavity (22) is located in the middle of the sliding hole (21) and is in communication with the sliding hole. The temperature sensing probe body (1) is provided with a built-in groove (11) in its interior and is in communication with the sliding hole (21). The connector (3) is provided with a built-in hole (31) in its interior and is in communication with the sliding hole (21). The central axes of the sliding hole (21), the sealing cavity (22), the built-in hole (31) and the threaded hole coincide with each other.

3. The NTC temperature sensor for a new energy vehicle thermal management system according to claim 2, characterized in that: The inner seal (4) comprises an annular block (41) which slides with the circumferential outer surface of the temperature sensing probe body (1); the inner side of the annular block (41) is fixedly connected with an inner lining block (42) which slides with the inner wall of the built-in groove (11); the side of the annular block (41) away from the hexagonal head (20) is fixedly connected with an annular baffle (43) having the same diameter as the threaded column (2); the circumferential outer surface of the annular block (41) is sleeved with a sealing ring block (44) which fits with the side of the annular baffle (43); the side of the annular block (41) away from the annular baffle (43) is provided with a circular groove (411), and the inner wall of the circular groove (411) is provided with a strong spring (412) connected to the outer end of the threaded column (2).

4. The NTC temperature sensor for a new energy vehicle thermal management system according to claim 3, characterized in that: The locking device (5) includes a sliding rod (51) that slides with the inner wall of the sliding hole (21); the sliding rod (51) is fixedly connected to the inside of the inner liner block (42) at one end close to the temperature sensing probe body (1); the circumferential outer surface of the sliding rod (51) is fixedly connected to a piston plate (52) that slides in a sealing manner with the inner wall of the sealing cavity (22); the sliding rod (51) is rotatably connected to a locking rod (53) that is threadedly connected to the threaded hole at one end away from the inner liner block (42); and the thread rotation direction of the locking rod (53) is opposite to the thread rotation direction of the threaded column (2).

5. The NTC temperature sensor for a new energy vehicle thermal management system according to claim 3, characterized in that: An elastic ring plate (441) is nested inside the sealing ring block (44), and a pulling plate (413) is slidably connected inside the annular block (41) and is rotatably installed on the inner side of the elastic ring plate (441). A magnetic plate (414) is fixedly connected to the pulling plate (413) on the side away from the elastic ring plate (441), and a micro spring (415) connected to the inside of the annular block (41) is arranged on the side of the magnetic plate (414) close to the pulling plate (413).

6. The NTC temperature sensor for a thermal management system of a new energy vehicle according to claim 5, characterized in that: The circumferential outer surface of the temperature sensing probe body (1) is provided with a magnetic block (12) magnetically connected to the magnetic plate (414); in an initial state, the magnetic plate (414) and the magnetic block (12) are in a state of mutual magnetic attraction, and the diameter of the space enclosed by the sealing ring block (44) is smaller than the diameter of the annular baffle (43).

7. The NTC temperature sensor for a new energy vehicle thermal management system according to claim 5, characterized in that: A T-shaped plate (442) that engages with the inside of the sealing ring block (44) is fixedly connected to the side of the elastic ring plate (441) away from the pulling plate (413), and the elastic ring plate (441) and the T-shaped plate (442) are designed as an integral molding.

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