Glass wrapping type sensor for monitoring temperature of motor of electric automobile

Abstract

The utility model discloses a glass-wrapped electric automobile motor temperature monitoring sensor, and belongs to the field of electric automobile sensors. A glass wrapping type electric automobile motor temperature monitoring sensor comprises a base and further comprises a fixing piece fixedly arranged on the base, and a clamping groove is formed in the base; the bottom of the buckling piece is clamped in the clamping groove in the base, and the top of the buckling piece is clamped to the top of the fixing piece; the heat-sensitive probe comprises a heat-sensitive chip and an electric wire connected with the heat-sensitive chip, the heat-sensitive chip is wrapped by glass, the heat-sensitive chip is arranged in the fixing piece and is sealed through epoxy resin, and one end, far away from the heat-sensitive chip, of the electric wire penetrates through the base and extends outwards; according to the utility model, rapid installation can be realized on the premise that the sensor is not damaged, the thermosensitive chip is wrapped by glass and sealed by epoxy, the waterproof performance, the mechanical vibration resistance and the mechanical pressure resistance are very strong, and the installation working hours of a production line are reduced and the efficiency is improved through a clamping installation mode.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle sensor technology, and in particular to a glass-encased sensor for monitoring the temperature of an electric vehicle motor. Background Technology

[0002] A crucial component of new energy electric vehicles is the electric motor, and the hazards of motor overheating are multifaceted. First, overheating accelerates the aging of motor components, shortening the motor's lifespan. This is because high temperatures cause a decline in the performance of internal materials; for example, the insulation material of the coils may age faster due to high temperatures, leading to motor failure. Second, if overheating persists, it can easily damage internal components such as bearings and magnets, causing them to deform or break down, ultimately leading to motor failure. This affects the electric vehicle's performance and may even prevent it from operating normally. Furthermore, motor overheating can lead to more serious consequences. For instance, high internal temperatures can cause insulation materials to fail, resulting in short circuits, fires, and other safety hazards.

[0003] To ensure the long lifespan of the motor and to achieve its optimal performance, the motor temperature needs to be continuously monitored. Therefore, monitoring the temperature of the stator windings is crucial, as it is an important means for the motor to fully utilize its advantages and avoid the risk of overheating.

[0004] Traditional motor products are usually installed by directly embedding the windings. This installation method involves binding and then applying paint, which may damage the core temperature sensing component of the temperature sensor. Therefore, the encapsulation of the thermistor, the core component of the sensor, becomes extremely important. In view of this, this utility model is proposed. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a glass-encased temperature sensor for monitoring electric vehicle motors.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A glass-encased temperature sensor for monitoring electric vehicle motors includes a base and further comprises:

[0008] A fastener is fixedly mounted on a base, and the base has a slot.

[0009] The fastener has its bottom engaged in a slot on the base and its top engaged in a top of the fixing member.

[0010] A thermal probe, comprising a thermal chip and a wire connected to the thermal chip, wherein the thermal chip is encased in glass, the thermal chip is placed in a fixing component and sealed with epoxy resin, and the end of the wire away from the thermal chip passes through the base and extends outward.

[0011] Copper busbars are wrapped around the outer wall of the fastener.

[0012] Preferably, the fastener has a through hole and a first locking block at its bottom. The first locking block has an inclined section and a flat section. When the fastener is engaged with the base, the flat section abuts against the bottom outer wall of the base.

[0013] Furthermore, the top of the fastener is provided with an extension plate perpendicular to it, and the extension plate is provided with a second locking block. A notch is provided on one side of the top of the fastener, and the second locking block is engaged in the notch.

[0014] Preferably, a guide member is integrally formed on the base, and the guide member has an arc segment.

[0015] Furthermore, the feature is that a channel is formed between the fixing member and the buckle member, one end of the copper busbar abuts against the guide member, and the other end of the copper busbar passes through the channel and extends outward.

[0016] Preferably, the thermal probe further includes interconnected connecting wires and connecting pins, the connecting wires being connected to the thermal chip, and the connecting pins being connected to electrical wires.

[0017] Furthermore, both the base and the fixing member are provided with placement grooves, the thermal chip is encapsulated in the placement grooves by epoxy resin, the base is provided with an outlet, and the end of the wire away from the connecting pin passes through the outlet and extends outward.

[0018] Compared with the prior art, this utility model provides a glass-encased temperature sensor for monitoring electric vehicle motors, which has the following advantages:

[0019] 1. This glass-encased temperature sensor for monitoring electric vehicle motors features a thermistor chip on its thermal probe encased in glass and then sealed with epoxy resin, providing excellent waterproofing, resistance to mechanical vibration, and resistance to mechanical pressure.

[0020] 2. This glass-encased temperature sensor for monitoring electric vehicle motors has a connecting wire and a connecting pin between the thermistor chip on the thermistor probe and the wire. The connection is made by resistance welding. The small welding point reduces the cross-connection between welding points and avoids short circuits in the product.

[0021] 3. This glass-enclosed temperature sensor for monitoring electric vehicle motors has a first locking block that engages with the bottom outer wall of the base, and a second locking block that engages with the top notch of the fixing component. The locking component and the extension plate form an L-shaped positioning. Through interference fit, the base and the locking component are fixed together, thereby achieving the positioning of the copper busbar. This simple installation method reduces the installation time on the production line and improves work efficiency. Attached Figure Description

[0022] Figure 1 This invention presents a schematic diagram of the structure of a glass-encased temperature sensor for monitoring electric vehicle motors. Figure 1 ;

[0023] Figure 2 This invention presents a schematic diagram of the structure of a glass-encased temperature sensor for monitoring electric vehicle motors. Figure 2 ;

[0024] Figure 3 This invention provides a schematic diagram of the bottom structure of a glass-encased temperature sensor for monitoring electric vehicle motors. Figure 1 ;

[0025] Figure 4 This invention provides a schematic diagram of the bottom structure of a glass-encased temperature sensor for monitoring electric vehicle motors. Figure 2 ;

[0026] Figure 5 This is a schematic diagram of the placement groove in a glass-enclosed temperature sensor for monitoring electric vehicle motors, as proposed in this utility model.

[0027] Figure 6 This is a schematic diagram of a glass-enclosed temperature sensor for monitoring electric vehicle motors, which does not contain fasteners or copper busbars, as proposed in this utility model.

[0028] Figure 7 This is a schematic diagram of the fastener structure in a glass-enclosed temperature sensor for monitoring electric vehicle motors proposed in this utility model;

[0029] Figure 8 This is a schematic diagram of the structure of a thermistor probe in a glass-enclosed temperature sensor for monitoring electric vehicle motors, as proposed in this utility model.

[0030] In the diagram: 1. Base; 101. Slot; 102. Outlet; 103. Guide; 104. Arc segment; 105. Fixing component; 106. Notch; 107. Placement slot; 2. Buckling component; 201. Through hole; 202. First locking block; 203. Sloping section; 204. Flat section; 205. Extension plate; 206. Second locking block; 3. Thermal chip; 301. Connecting wire; 302. Connecting pin; 303. Wire; 4. Copper busbar. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0032] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Example 1:

[0034] Reference Figures 1-8 A glass-encased temperature sensor for monitoring electric vehicle motors includes a base 1, a fixing member 105, a snap fastener 2, and a thermal probe, all fixedly mounted on the base 1. The base 1 has a slot 101; the bottom of the snap fastener 2 engages with the slot 101 on the base 1, and the top of the snap fastener 2 engages with the top of the fixing member 105. The thermal probe includes a thermal chip 3 and a wire 303 connected to the thermal chip 3. The thermal chip 3 is encased in glass and placed within the fixing member 105, sealed with epoxy resin. One end of the wire 303, away from the thermal chip 3, passes through the base 1 and extends outward. A copper busbar 4 is wrapped around the fixing member 105.

[0035] In this embodiment, to avoid damage to the temperature sensor during installation, a close-fitting installation of the temperature sensor is a common practice. In this application, the bottom and top of the clip 2 are first snapped together with the base 1 and the fixing member 105 respectively to fix the copper busbar 4. This installation method ensures close contact between the temperature sensor and the surface of the motor being measured, thereby accurately measuring the temperature of the motor. The clip 2 on the upper part of the motor is connected by a dimensional fit and a snap-fit, which can quickly sense the temperature change on the surface of the motor and convert it into an electrical signal output. This sensor is made of a material with good thermal conductivity to ensure the accuracy and fast response of temperature measurement, and can also achieve quick installation without damaging the temperature sensor.

[0036] Specifically, the thermal chip 3 of the thermal probe is encased in glass and then sealed with epoxy, which has the advantages of strong waterproofness, resistance to mechanical vibration and mechanical pressure. The simple snap-on installation method can reduce the installation time on the production line and improve work efficiency.

[0037] Example 2: Refer to Figures 1-7 A glass-encased temperature sensor for monitoring electric vehicle motors includes a base 1, a fixing member 105, a snap fastener 2, and a thermal probe, all fixedly mounted on the base 1. The base 1 has a slot 101; the bottom of the snap fastener 2 engages with the slot 101 on the base 1, and the top of the snap fastener 2 engages with the top of the fixing member 105. The thermal probe includes a thermal chip 3 and a wire 303 connected to the thermal chip 3. The thermal chip 3 is encased in glass and placed within the fixing member 105, sealed with epoxy resin. One end of the wire 303, away from the thermal chip 3, passes through the base 1 and extends outwards.

[0038] The fastener 2 has a through hole 201 and a first locking block 202 at the bottom. The first locking block 202 has an inclined section 203 and a flat section 204. When the fastener 2 is engaged with the base 1, the flat section 204 abuts against the bottom outer wall of the base 1.

[0039] In this embodiment, during installation, the inclined section 203 at the bottom of the first locking block 202 first contacts the outer wall of the base 1, causing the plastic first locking block 202 to deform. The buckle 2 continues to press down, causing the first locking block 202 to move downward continuously. When the first locking block 202 moves to the bottom of the base 1, the deformed first locking block 202 automatically resets, so that the flat section 204 on the first locking block 202 abuts against the bottom outer wall of the base 1, thereby completing the locking between the first locking block 202 and the base 1.

[0040] The top of the buckle 2 is provided with an extension plate 205 perpendicular to it, and a second locking block 206 is provided on the extension plate 205. A notch 106 is provided on one side of the top of the fastener 105, and the second locking block 206 is engaged in the notch 106.

[0041] After the first locking block 202 completes the locking, the second locking block 206 on the top of the fastener 2 will lock into the notch 106, thereby completing the locking of the top of the fastener 2. The base 1 and the fastener 2 are fixed by interference fit. The simple installation method reduces the installation time on the production line and improves work efficiency.

[0042] Example 3: Refer to Figures 1-8A glass-encased temperature sensor for monitoring electric vehicle motors includes a base 1, a fixing member 105, a snap fastener 2, and a thermal probe, all fixedly mounted on the base 1. The base 1 has a slot 101; the bottom of the snap fastener 2 engages with the slot 101 on the base 1, and the top of the snap fastener 2 engages with the top of the fixing member 105. The thermal probe includes a thermal chip 3 and a wire 303 connected to the thermal chip 3. The thermal chip 3 is encased in glass and placed within the fixing member 105, sealed with epoxy resin. One end of the wire 303, away from the thermal chip 3, passes through the base 1 and extends outwards.

[0043] A guide 103 is integrally formed on the base 1, and an arc segment 104 is provided on the guide 103.

[0044] A channel is formed between the fastener 105 and the snap fastener 2. A copper busbar 4 is wrapped around the fastener 105. One end of the copper busbar 4 abuts against the guide 103, and the other end of the copper busbar 4 passes through the channel and extends outward.

[0045] In this embodiment, the guide 103 can limit the copper busbar 4 and make the copper busbar 4 easy to install. During installation, the arc segment 104 can not only play a guiding role, but also, compared with right angles or sharp edges, can guide the copper busbar 4 to the sensor into the predetermined position more smoothly, reduce friction and resistance during the insertion process, avoid damage to the sensor or the installation structure due to hard collision, make the installation process more convenient, and improve assembly efficiency.

[0046] The thermal probe also includes a connecting wire 301 and a connecting pin 302 that are connected to each other. The connecting wire 301 is connected to the thermal chip 3, and the connecting pin 302 is connected to the wire 303.

[0047] Both the base 1 and the fixing member 105 are provided with placement grooves 107. The thermal chip 3 is encapsulated in the placement grooves 107 by epoxy resin. The base 1 is provided with an outlet 102. The end of the wire 303 away from the connection pin 302 passes through the outlet 102 and extends outward.

[0048] In this application, the thermistor chip 3 is encapsulated in glass. After the thermistor chip 3 is inserted into the placement slot 107, it is encapsulated in epoxy resin, which has the advantages of strong waterproofness, resistance to mechanical vibration and mechanical pressure, and can better sense temperature changes and convert the temperature signal into a change in resistance value. The connecting line 301 and the connecting pin 302 play the role of transmitting electrical signals, ensuring that the temperature signal sensed by the thermistor chip 3 can be smoothly transmitted to the wire 303 and then read by the external device. The wire 303 is used to transmit the resistance value change signal sensed by the temperature sensing chip to the external measurement and control circuit. It is connected by resistance welding. The small welding point can reduce the cross connection between the welding points and avoid short circuits in the product.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A glass encapsulated monitoring electric vehicle motor temperature sensor comprising a base (1), characterized in that, Also include: The fixed part (105) is fixedly arranged on the base (1), and the base (1) is provided with a clamping groove (101); The buckle part (2) is clamped at the top of the fixed part (105); The heat sensitive probe comprises a heat sensitive chip (3) and a wire (303) connected with the heat sensitive chip (3), the heat sensitive chip (3) is wrapped with glass, the heat sensitive chip (3) is placed in the fixed part (105) and sealed by epoxy resin, and the wire (303) is away from the heat sensitive chip (3) and extends outward through the base (1); The copper bar (4) is wrapped outside the fixed part (105).

2. The glass encapsulated monitoring electric vehicle motor temperature sensor according to claim 1, wherein, The buckle part (2) is provided with a through hole (201), the bottom of the buckle part (2) is provided with a first clamping block (202), the first clamping block (202) is provided with an inclined section (203) and a flat section (204), and when the buckle part (2) is clamped with the base (1), the flat section (204) is in abutment with the bottom outer wall of the base (1).

3. A glass encapsulated monitoring electric vehicle motor temperature sensor according to claim 2, wherein, The top of the buckle part (2) is provided with an elongated plate (205) perpendicular thereto, the elongated plate (205) is provided with a second clamping block (206), one side of the top of the fixed part (105) is provided with a missing slot (106), and the second clamping block (206) is clamped in the missing slot (106).

4. The temperature sensor for monitoring the temperature of an electric motor of an electric vehicle according to claim 1, wherein The base (1) is integrally formed with a guide part (103), and the guide part (103) is provided with a circular arc section (104).

5. The temperature sensor for monitoring the temperature of an electric motor of an electric vehicle according to claim 4, wherein The fixed part (105) and the buckle part (2) form a channel, one end of the copper bar (4) abuts against the guide part (103), and the other end of the copper bar (4) passes through the channel and extends outward.

6. The temperature sensor for monitoring the electric motor of an electric vehicle according to claim 1, wherein The heat sensitive probe further comprises a connecting wire (301) and a connecting pin (302) connected with each other, the connecting wire (301) is connected with the heat sensitive chip (3), and the connecting pin (302) is connected with the wire (303).

7. A glass encapsulated monitoring electric vehicle motor temperature sensor according to claim 6, wherein, The base (1) and the fixed part (105) are provided with a placing groove (107), the heat sensitive chip (3) is packaged in the placing groove (107) by epoxy resin, the base (1) is provided with an outlet (102), and the wire (303) away from the connecting pin (302) passes through the outlet (102) and extends outward.

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