Temperature sensor applied to monitoring electric vehicle motor

Abstract

The utility model discloses a temperature sensor applied to monitoring an electric automobile motor, and relates to the technical field of temperature sensors. The utility model discloses a temperature sensor applied to monitoring a motor of an electric vehicle. The temperature sensor comprises a metal buckle used for wrapping a thermistor; according to the utility model, the metal buckle is inserted into the copper bar through the insertion groove formed by the bending parts which are symmetrically bent on the metal buckle, so that the metal buckle can be rapidly installed on the motor without causing damage to the thermistor; besides, the metal buckle is made of metal materials and good in heat conduction performance, so that the thermistor is connected with the metal buckle, loss of the thermistor can be avoided, the temperature monitoring performance of the thermistor can be improved, the response time is effectively shortened, the copper bar can be wrapped with the maximum area due to the arrangement of the bending part, and the service life of the copper bar is prolonged. Therefore, the contact area between the metal buckle and the copper bar is increased, and the stability of the metal buckle on the copper bar is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature sensors, and in particular relates to a temperature sensor used for monitoring a motor of an electric vehicle. Background Art

[0002] An important component of new energy electric vehicles is the electric motor. The hazards of overheating of electric vehicle motors are multifaceted.

[0003] First, overheating of the motor will accelerate the aging of the motor components, thus shortening the life of the motor. This is because the high temperature environment will cause the performance of the materials inside the motor to deteriorate. For example, the insulation material of the coil may accelerate aging due to high temperature, which will cause the motor to fail.

[0004] Secondly, if the motor overheats continuously, it is easy to cause damage to the internal parts of the motor, such as bearings and magnetic steel, which may be deformed or damaged due to high temperature, and then cause the motor to fail as a whole. This will affect the driving performance of the electric vehicle and may even cause the electric vehicle to fail to operate normally.

[0005] In addition, motor overheating may also lead to more serious consequences. For example, the high temperature inside the motor may cause the insulation material to fail, resulting in safety hazards such as short circuits and fires.

[0006] In order to ensure the long life of the motor and to achieve its best performance, the temperature of the motor also needs to be continuously monitored. Therefore, it is crucial to monitor the temperature of the stator winding. This is an important means for the motor to fully utilize its full advantages and avoid the risk of overheating.

[0007] The traditional installation method of motor products is generally to bury the winding directly. If the motor design allows, the temperature sensor can be buried directly inside the motor winding. This can more accurately sense the temperature inside the motor and avoid the influence of heat transfer. The specific operation steps include selecting a suitable location, cleaning the winding surface, drilling holes to bury the sensor, etc. This buried winding installation method is prone to damage to the head of the temperature sensor. Excessive pressure during the burial process causes the NTC to crack, resulting in abnormal resistance of the temperature sensor, or other parts of the sensor are pierced, causing the temperature sensor to short-circuit, etc. For this reason, we propose a temperature sensor for monitoring electric vehicle motors. Utility Model Content

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a temperature sensor for monitoring the motor of an electric vehicle, which can overcome the above problems or at least partially solve the above problems.

[0009] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: a temperature sensor used for monitoring the motor of an electric vehicle, comprising: a metal buckle for wrapping a thermistor, the metal buckle comprising a straight plate portion and bent portions bent from both sides of the straight plate portion to be close to each other, an insertion groove is formed between the bent portion and the straight plate portion for inserting into the copper busbar; the symmetrical bent portions on the metal buckle are provided with cutting grooves, the bent portions are formed with a pressure plate through the cutting grooves, and the pressure plate is used to clamp the metal buckle on the copper busbar; the thermistor is wrapped by a plate extending from the metal buckle, so that one side of the thermistor is in close contact with one side of the straight plate portion.

[0010] Furthermore, the pressing plate is provided with a first raised portion near the opening end of the cutout groove.

[0011] Furthermore, a second tilting portion is provided on a side of the bending portion away from the first tilting portion.

[0012] Preferably, the plate is a first clamping buckle and a second clamping buckle.

[0013] Furthermore, a hook portion is provided on one of the bending portions, and the hook portion bends toward the insertion groove.

[0014] Furthermore, a first limiting portion is provided on one end of the metal buckle close to the second tilting portion, and the first limiting portion is bent toward the first holding buckle and the second holding buckle.

[0015] Furthermore, a second limiting portion is provided on one end of the metal buckle close to the first tilting portion, and the second limiting portion is bent toward the pressure plate.

[0016] Preferably, the thermistor is encapsulated in a Teflon filler.

[0017] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model inserts the metal buckle into the copper busbar through the insertion groove formed by the symmetrically bent portion on the metal buckle, so that the metal buckle can be quickly installed on the motor without causing damage to the thermistor; in addition, since the metal buckle is made of metal material with good thermal conductivity, the thermistor is connected to the metal buckle, which can avoid the loss of the thermistor while improving the temperature monitoring performance of the thermistor and effectively shorten the response time, and the setting of the bent portion can wrap the copper busbar with the maximum area, increase the contact area between the metal buckle and the copper busbar, and thus effectively improve the stability of the metal buckle on the copper busbar.

[0018] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the attached picture:

[0020] Figure 1 This is a schematic diagram of the structure of a temperature sensor for monitoring electric vehicle motors proposed by the utility model;

[0021] Figure 2 This is a schematic structural diagram of a hook portion of a temperature sensor for monitoring a motor of an electric vehicle proposed in the utility model;

[0022] Figure 3 This is a schematic structural diagram of a first limiter portion of a temperature sensor for monitoring a motor of an electric vehicle proposed in the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of an insertion slot for a temperature sensor used to monitor a motor of an electric vehicle proposed by the utility model;

[0024] Figure 5 The utility model is a schematic diagram of the structure of a second limiter of a temperature sensor for monitoring a motor of an electric vehicle.

[0025] In the figure: 100, metal buckle; 1, straight plate portion; 10, insertion slot; 11, bending portion; 12, cutting slot; 13, pressing plate; 14, first tilting portion; 15, second tilting portion; 16, hook portion; 17, first holding buckle; 18, second holding buckle; 19, first limiting portion; 191, second limiting portion; 2, thermistor; 21, wire; 3, copper busbar. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0027] Example: Refer to Figure 1-Figure 5 A temperature sensor for monitoring electric vehicle motors includes: a metal buckle 100 for wrapping a thermistor 2, the metal buckle 100 includes a straight plate portion 1 and bent portions 11 bent from both sides of the straight plate portion 1 to be close to each other, an insertion groove 10 is formed between the bent portion 11 and the straight plate portion 1, and is used to be inserted into a copper bar 3; the symmetrical bent portions 11 on the metal buckle 100 are all provided with a cutout groove 12, and the bent portion 11 is formed with a pressing plate 13 through the cutout groove 12, and the pressing plate 13 is used to clamp the metal buckle 100 on the copper bar 3, which is a component in the motor; the thermistor 2 is wrapped by a plate extending from the metal buckle 100, so that one side of the thermistor 2 is in close contact with one side of the straight plate portion 1;

[0028] When in use, the metal buckle 100 is inserted into the copper bus 3 through the insertion slot 10 formed by the symmetrically bent portion 11 on the metal buckle 100, so that the metal buckle 100 can be quickly installed on the motor without causing damage to the thermistor 2;

[0029] In addition, since the metal buckle 100 is made of metal and has good thermal conductivity, the thermistor 2 is connected to the metal buckle 100, which can avoid the loss of the thermistor 2 and improve the temperature monitoring performance of the thermistor 2, effectively shortening the response time. The setting of the bending portion 11 can wrap the copper bus 3 with the maximum area, increasing the contact area between the metal buckle 100 and the copper bus 3, thereby effectively improving the stability of the metal buckle 100 on the copper bus 3.

[0030] In addition, the arrangement of the pressing plate 13 enables the metal clip 100 to further clamp the copper busbar 3 .

[0031] The thermistor 2 is encapsulated in Teflon filler, wherein the wire 21 connected to the thermistor 2 is also encapsulated in Teflon filler; the plate is a first holding buckle 17 and a second holding buckle 18;

[0032] The first holding buckle 17 and the second holding buckle 18 can tightly wrap the thermistor 2 encapsulated in the Teflon filler, and can effectively prevent the thermistor 2 from loosening on the metal buckle 100.

[0033] The pressing plate 13 is provided with a first raised portion 14 near the opening end of the cutout groove 12;

[0034] A second tilting portion 15 is disposed on one side of the bending portion 11 away from the first tilting portion 14 . The arrangement of the first tilting portion 14 and the second tilting portion 15 can facilitate the insertion and removal of the metal clip 100 on the copper busbar 3 .

[0035] A hook portion 16 is provided on one of the bending portions 11, and the hook portion 16 bends toward the insertion slot 10, which can further clamp the copper busbar 3, effectively preventing it from loosening during operation, and at the same time enables the metal clip 100 to fit tightly against the copper busbar 3, so that the temperature in the motor can be transferred to the thermistor 2 more quickly.

[0036] A first limiting portion 19 is provided at one end of the metal buckle 100 close to the second tilting portion 15, and the first limiting portion 19 is bent toward the first holding buckle 17 and the second holding buckle 18;

[0037] The provision of the first limiting portion 19 can facilitate the limiting of the thermistor 2 .

[0038] A second limiting portion 191 is disposed on one end of the metal buckle 100 close to the first tilting portion 14 , and the second limiting portion 191 is bent toward the pressing plate 13 ;

[0039] The second limiting portion 191 can be provided to facilitate limiting the position of the metal clip 100 when it is inserted into the copper busbar 3 .

[0040] The utility model inserts the metal buckle 100 into the copper bus 3 through the insertion groove 10 formed by the symmetrically bent bending portion 11 on the metal buckle 100, so that the metal buckle 100 can be quickly installed on the motor without causing damage to the thermistor 2; in addition, since the metal buckle 100 is made of metal material with good thermal conductivity, the thermistor 2 is connected to the metal buckle 100, which can avoid the loss of the thermistor 2 while improving the temperature monitoring performance of the thermistor 2 and effectively shorten the response time. The setting of the bending portion 11 can wrap the copper bus 3 with the maximum area, increase the contact area between the metal buckle 100 and the copper bus 3, and thus effectively improve the stability of the metal buckle 100 on the copper bus 3.

[0041] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the present invention can make some changes or modifications to equivalent embodiments of equivalent changes using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A temperature sensor for monitoring electric vehicle motors, characterized in that: include: A metal clip (100) for wrapping a thermistor (2), the metal clip (100) comprising a straight plate portion (1) and bent portions (11) bent from two sides of the straight plate portion (1) to be close to each other, an insertion groove (10) being formed between the bent portion (11) and the straight plate portion (1) for being inserted into a copper busbar (3); The symmetrical bending parts (11) on the metal buckle (100) are each provided with a cutting groove (12), and the bending part (11) is formed with a pressing plate (13) through the cutting groove (12), and the pressing plate (13) is used to clamp the metal buckle (100) on the copper busbar (3); The thermistor (2) is wrapped by a plate extending from the metal buckle (100), so that one side of the thermistor (2) is in close contact with one side of the straight plate portion (1).

2. A temperature sensor for monitoring electric vehicle motors according to claim 1, characterized in that: The pressing plate (13) is provided with a first raised portion (14) near the opening end of the cutout groove (12).

3. A temperature sensor for monitoring electric vehicle motors according to claim 2, characterized in that: A second tilting portion (15) is provided on a side of the bending portion (11) away from the first tilting portion (14).

4. The temperature sensor for monitoring the motor of an electric vehicle according to claim 1, characterized in that: The plate components are a first holding buckle (17) and a second holding buckle (18).

5. A temperature sensor for monitoring electric vehicle motors according to claim 4, characterized in that: A hook portion (16) is provided on one of the bent portions (11), and the hook portion (16) bends toward the insertion groove (10).

6. A temperature sensor for monitoring electric vehicle motors according to claim 5, characterized in that: A first limiting portion (19) is provided on one end of the metal buckle (100) close to the second tilting portion (15), and the first limiting portion (19) is bent toward the first holding buckle (17) and the second holding buckle (18).

7. A temperature sensor for monitoring electric vehicle motors according to claim 6, characterized in that: A second limiting portion (191) is provided on one end of the metal buckle (100) close to the first tilting portion (14), and the second limiting portion (191) is bent toward the pressing plate (13).

8. The temperature sensor for monitoring the motor of an electric vehicle according to claim 7, characterized in that: The thermistor (2) is encapsulated in a Teflon filler.

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