Epoxy coating type electric vehicle motor temperature monitoring sensor

Abstract

The utility model discloses an epoxy coating type sensor for monitoring the temperature of a motor of an electric automobile, and belongs to the field of sensors of electric automobiles. An epoxy coating type electric automobile motor temperature monitoring sensor comprises a shell and further comprises a fixing piece fixedly arranged on the shell, a boss is arranged on the top of the fixing piece, and limiting grooves are formed in the two sides of the boss; the bottom of the L-shaped clamping plate is connected to the shell in a clamped mode, and the top of the L-shaped clamping plate is connected with the limiting groove in the top of the fixing piece in a clamped mode. The copper bar wraps the outer wall of the fixing piece; the thermistor chip is arranged in the fixing piece, and the thermistor chip is coated with epoxy; according to the utility model, the thermistor chip can be protected after being coated with epoxy, effects of preventing moisture and preventing chip fragmentation caused by external pressure are achieved, tight contact between the temperature sensor and the surface of the motor to be measured is ensured, the temperature of the motor is accurately measured, a simple installation mode is adopted, the working hours of production line installation are reduced, and the production efficiency is improved. The working efficiency is improved.

Description

Technical Field

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

[0002] One of the key components of new energy electric vehicles is the electric motor, and the dangers of overheating electric vehicle motors are multifaceted.

[0003] First, overheating of the motor will accelerate the aging of motor components, thereby shortening the motor's lifespan. This is because high-temperature environments can cause the performance of materials inside the motor to deteriorate. For example, the insulation material of the coil may age faster due to high temperatures, which in turn can lead to motor failure.

[0004] Secondly, if the motor overheating persists, it can easily damage internal components such as bearings and magnets, which may deform or be damaged due to high temperatures, leading to overall motor failure. This will affect the electric vehicle's driving performance and may even prevent the electric vehicle from operating normally.

[0005] In addition, overheating of the motor can 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] 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.

[0007] Traditional motor products are typically 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

[0008] The purpose of this invention is to solve the problems existing in the prior art by proposing an epoxy-coated temperature sensor for monitoring electric vehicle motors.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] An epoxy-coated temperature sensor for monitoring electric vehicle motors includes a housing and further includes:

[0011] A fastener is fixedly mounted on the outer casing, the fastener having a boss on its top and limiting grooves on both sides of the boss;

[0012] The L-shaped card plate has its bottom engaged with the outer shell, and its top engaged with the limiting groove at the top of the fixing component.

[0013] Copper busbars are wrapped around the outer wall of the fasteners;

[0014] A thermistor chip is set inside a fixing component. The thermistor chip is coated with epoxy. The thermistor chip is provided with pins, and wires are provided on the pins.

[0015] Preferably, the L-shaped card plate includes a vertically arranged vertical plate and a horizontally placed horizontal plate, the vertical plate and the horizontal plate are integrally formed, and the vertical plate is provided with a through hole.

[0016] Furthermore, the outer shell is provided with a slot, and the bottom of the vertical plate is provided with a first limiting block that cooperates with the slot.

[0017] Preferably, the first limiting block is provided with an inclined section and a flat section. When the L-shaped card plate is engaged with the outer shell, the flat section abuts against the bottom outer wall of the outer shell.

[0018] Furthermore, the horizontal plate is provided with a second limiting block, which is engaged in a limiting groove on one side of the boss.

[0019] Preferably, the wire is disposed at the end of the PIN pin away from the thermistor chip, and the housing has an outlet, with the end of the wire away from the PIN pin passing through the outlet and extending outward.

[0020] Preferably, the outer casing is further provided with a guide member, and the guide member is provided with a guide groove.

[0021] Furthermore, the copper busbar is disposed between the horizontal plate and the top outer wall of the outer casing, and the copper busbar is provided with a groove.

[0022] Compared with the prior art, this utility model provides an epoxy-coated temperature sensor for monitoring electric vehicle motors, which has the following advantages:

[0023] 1. This epoxy-coated electric vehicle motor temperature sensor ensures close contact between the temperature sensor and the surface of the motor being tested, thereby accurately measuring the motor temperature; it can quickly sense temperature changes on the motor surface and convert them into electrical signals for output by engaging with the copper busbar on the upper part of the motor through a snap-fit ​​mechanism.

[0024] 2. This epoxy-coated temperature sensor for monitoring electric vehicle motors features a thermistor chip coated with epoxy. The PIN pins are soldered to the wires. The epoxy protects the chip and provides moisture protection, preventing it from cracking due to external pressure. The high-temperature resistant material shell is encapsulated in high-temperature resistant epoxy, providing excellent waterproofing, resistance to mechanical vibration, and resistance to mechanical pressure.

[0025] 3. This epoxy-coated electric vehicle motor temperature sensor has a housing that is fixedly installed on a copper busbar. The first limiting block is engaged with the bottom of the housing, and the second limiting block is engaged with the top of the fixing part on the housing. By using an interference fit, the housing is fixed on the copper busbar in a simple installation method, which reduces the installation time on the production line and improves work efficiency. Attached Figure Description

[0026] Figure 1 This invention presents a schematic diagram of the structure of an epoxy-coated temperature sensor for monitoring electric vehicle motors. Figure 1 ;

[0027] Figure 2 This invention presents a schematic diagram of the structure of an epoxy-coated temperature sensor for monitoring electric vehicle motors. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the bottom structure of an epoxy-coated electric vehicle motor temperature monitoring sensor proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of an epoxy-coated electric vehicle motor temperature monitoring sensor without copper busbars proposed in this utility model;

[0030] Figure 5 This is a schematic diagram of the housing structure of an epoxy-coated electric vehicle motor temperature monitoring sensor proposed in this utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the L-shaped card plate in the epoxy-coated electric vehicle motor temperature monitoring sensor proposed in this utility model;

[0032] Figure 7 This is a schematic diagram of the thermistor chip, PIN pin, and wire in an epoxy-coated electric vehicle motor temperature monitoring sensor proposed in this utility model.

[0033] In the diagram: 1. Outer shell; 101. Fixing component; 102. Boss; 103. Limiting groove; 104. Guide component; 105. Guide groove; 106. Slot; 107. Outlet; 2. Vertical plate; 201. Through hole; 202. First limiting block; 203. Inclined section; 204. Flat section; 205. Horizontal plate; 206. Second limiting block; 3. Copper busbar; 301. Groove; 4. Thermistor chip; 401. Wire; 402. PIN pin. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] Example 1: Refer to Figures 1-7 An epoxy-coated temperature sensor for monitoring electric vehicle motors includes a housing 1 and a fixing member 101 fixedly mounted on the housing 1. The fixing member 101 has a boss 102 on its top and limiting grooves 103 on both sides of the boss 102. It also has an L-shaped clamping plate, the bottom of which is clamped to the housing 1, and the top of the L-shaped clamping plate is clamped to the limiting grooves 103 on the top of the fixing member 101. A copper busbar 3 is wrapped around the outer wall of the fixing member 101. A thermistor chip 4 is disposed inside the fixing member 101. The thermistor chip 4 is epoxy-coated and has PIN pins 402 on it. Wires 401 are disposed on the PIN pins 402.

[0037] In this embodiment, to avoid damage to the temperature sensor during installation, a common practice is to install the temperature sensor in a close fit. This installation method ensures close contact between the temperature sensor and the surface of the motor being measured, thereby accurately measuring the motor temperature. The copper busbar 3 on the upper part of the motor is fixed between the outer shell 1 and the L-shaped clip by matching the dimensions and using a clip. The copper busbar 3 is also attached to the surface of the fixing part 101, and the thermistor chip 4 is set inside the fixing part 101, fixing the temperature sensor head in the middle of the copper busbar 3. This makes the temperature measurement more accurate and can quickly sense the temperature change on the motor surface and convert it into an electrical signal output. Moreover, this type of sensor is usually made of a material with good thermal conductivity to ensure the accuracy of temperature measurement and fast response. It can also achieve quick installation without damaging the temperature sensor.

[0038] Secondly, after the thermistor chip 4 is coated with epoxy, the PIN pin 402 and the wire 401 are soldered together. The epoxy resin can protect the chip, which can prevent moisture and avoid the chip from being broken by external pressure. In addition, the outer shell 1 is made of high temperature resistant material and is sealed with high temperature resistant epoxy, which has the advantages of strong waterproofness, resistance to mechanical vibration and mechanical pressure.

[0039] Example 2: Refer to Figures 1-6 An epoxy-coated temperature sensor for monitoring electric vehicle motors includes a housing 1 and a fixing member 101 fixedly mounted on the housing 1. The fixing member 101 has a boss 102 on its top and limiting grooves 103 on both sides of the boss 102. It also has an L-shaped clamping plate, the bottom of which is clamped to the housing 1, and the top of the L-shaped clamping plate is clamped to the limiting grooves 103 on the top of the fixing member 101. A copper busbar 3 is wrapped around the outer wall of the fixing member 101. A thermistor chip 4 is disposed inside the fixing member 101. The thermistor chip 4 is epoxy-coated and has PIN pins 402 on it. Wires 401 are disposed on the PIN pins 402.

[0040] The L-shaped card plate includes a vertically arranged vertical plate 2 and a horizontally placed horizontal plate 205. The vertical plate 2 and the horizontal plate 205 are integrally formed, and the vertical plate 2 is provided with a through hole 201.

[0041] Specifically, the L-shaped card in this application is composed of two mutually perpendicular vertical plates 2 and horizontal plates 205. In use, the vertical plates 2 are snapped onto the outer casing 1, and the horizontal plates 205 abut against the top of the copper busbar 3, thereby fixing the copper busbar 3.

[0042] The outer shell 1 is provided with a slot 106, and the bottom of the vertical plate 2 is provided with a first limiting block 202 that cooperates with the slot 106.

[0043] The first limiting block 202 is provided with an inclined section 203 and a flat section 204. When the L-shaped card plate is engaged with the outer shell 1, the flat section 204 abuts against the bottom outer wall of the outer shell 1.

[0044] When engaging the bottom of the L-shaped card plate, the vertical plate 2 is inserted along the slot 106. The inclined section 203 on the first limiting block 202 will first contact the top outer wall of the outer shell 1. Due to the presence of the through hole 201 and the fact that the vertical plate 2 is made of plastic, the bottom sides of the vertical plate 2 are relatively narrow. Therefore, during insertion, the bottom of the vertical plate 2 will deform, causing the vertical plate 2 to move the first limiting block 202 downward. When the first limiting block 202 moves to the bottom outer wall of the outer shell 1, the deformed first limiting block 202 will automatically reset, thereby causing the flat section 204 to abut against the bottom outer wall of the outer shell 1, thus forming a fixation.

[0045] A second limiting block 206 is provided on the horizontal plate 205, and the second limiting block 206 is engaged in the limiting groove 103 on one side of the boss 102.

[0046] After the bottom of the L-shaped card is engaged, the second limiting block 206 on the horizontal plate 205 will move into the limiting groove 103 on one side of the boss 102, thereby engaging the second limiting block 206 with the fixing member 101 to fix the L-shaped card, thus fixing the position of the copper busbar 3 and making the temperature measurement more accurate.

[0047] Example 3: Refer to Figures 1-7 An epoxy-coated temperature sensor for monitoring electric vehicle motors is basically the same as in Embodiment 2, but with a further improvement: the wire 401 is located at the end of the PIN pin 402 away from the thermistor chip 4, and the housing 1 has an outlet 107. The end of the wire 401 away from the PIN pin 402 passes through the outlet 107 and extends outward; the thermistor chip 4 is epoxy-coated inside the fixing member 101, and the PIN pin 402 and the wire 401 are welded together. The epoxy resin structure can protect the thermistor chip 4, achieving the effect of moisture protection and preventing the chip from breaking due to external pressure.

[0048] The housing 1 is also provided with a guide 104, and the guide 104 is provided with a guide groove 105; the guide 104 can guide the temperature sensor to be installed accurately, reduce installation resistance and wear, and improve installation efficiency; the guide groove 105 is set in a chamfer shape, which can facilitate the insertion of the temperature sensor and reduce the obstruction during insertion.

[0049] The copper busbar 3 is located between the horizontal plate 205 and the top outer wall of the outer casing 1. The copper busbar 3 has a groove 301, which can optimize the heat transfer and temperature sensing of the copper busbar 3, and facilitate assembly and maintenance.

[0050] 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. An epoxy-coated monitoring electric vehicle motor temperature sensor comprising a housing (1), characterized in that, Also includes: A fixing member (101) is fixedly installed on the outer shell (1). The top of the fixing member (101) is provided with a boss (102), and both sides of the boss (102) are provided with limiting grooves (103). L-shaped card plate, the bottom of the L-shaped card plate is snapped onto the outer shell (1), and the top of the L-shaped card plate is snapped onto the limiting groove (103) at the top of the fixing member (101). A copper busbar (3) is wrapped around a fastener (101); A thermistor chip (4) is disposed in a fixture (101). The thermistor chip (4) is coated with epoxy. The thermistor chip (4) is provided with a PIN pin (402), and the PIN pin (402) is provided with a wire (401).

2. The epoxy-coated temperature sensor for monitoring the temperature of an electric motor of an electric vehicle according to claim 1, wherein The L-shaped card plate includes a vertically arranged vertical plate (2) and a horizontally placed horizontal plate (205). The vertical plate (2) and the horizontal plate (205) are integrally formed, and the vertical plate (2) is provided with a through hole (201).

3. The epoxy-coated electric vehicle motor temperature monitoring sensor according to claim 2, characterized in that, The outer shell (1) is provided with a slot (106), and the bottom of the vertical plate (2) is provided with a first limiting block (202) that cooperates with the slot (106).

4. The epoxy-coated electric vehicle motor temperature monitoring sensor according to claim 3, characterized in that, The first limiting block (202) is provided with an inclined section (203) and a flat section (204). When the L-shaped card plate is engaged with the outer shell (1), the flat section (204) abuts against the bottom outer wall of the outer shell (1).

5. The epoxy-coated electric vehicle motor temperature monitoring sensor according to claim 3, characterized in that, The horizontal plate (205) is provided with a second limiting block (206), which is engaged in the limiting groove (103) on one side of the boss (102).

6. The epoxy-coated electric vehicle motor temperature monitoring sensor according to claim 1, characterized in that, The wire (401) is located at the end of the PIN pin (402) away from the thermistor chip (4). The housing (1) is provided with an outlet (107). The end of the wire (401) away from the PIN pin (402) passes through the outlet (107) and extends outward.

7. The epoxy-coated electric vehicle motor temperature monitoring sensor according to claim 1, characterized in that, The outer shell (1) is also provided with a guide (104), and the guide (104) is provided with a guide groove (105).

8. The epoxy-coated electric vehicle motor temperature monitoring sensor according to claim 2, characterized in that, The copper busbar (3) is disposed between the horizontal plate (205) and the top outer wall of the outer shell (1), and the copper busbar (3) is provided with a groove (301).

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