Temperature measurement structure for switching device, and on-board charger

Abstract

A temperature measurement structure for a switching device (2), comprising a fixing support (1) provided with a through hole (121), at least one switching device (2) electrically connected to a circuit board and arranged on one side of the fixing support (1), and at least one temperature measurement device (3) electrically connected to the circuit board and arranged on the other side of the fixing support (1), wherein a sensing end of the temperature measurement device (3) extends into the through hole (1) to be in contact with the switching device (2). By providing the temperature measurement device (3) on the fixing support (1) onto which the switching device (2) is fixed, the temperature measurement device (3) is in direct contact with the switching device (2) by means of the through hole (121) of the fixing support (1), so that the temperature measurement device (3) can acquire the temperature of the switching device (2) in real time, thereby achieving low thermal resistance and rapid heat conduction, and improving the real-time performance and accuracy of temperature measurement of the switching device (2). Therefore, by accurately monitoring the temperature of the switching device (2) in real time, when the temperature of the switching device (2) becomes excessively high, measures such as power derating or over-temperature protection are taken promptly to protect the switching device (2) and an on-board power supply. Also disclosed is an on-board charger.

Description

Switching device temperature measurement structure and on-board charger TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobiles, and more particularly relates to a switching device temperature measurement structure and an on-board charger. BACKGROUND

[0002] With the needs of energy saving and emission reduction and atmospheric pollution control, new energy vehicles are gradually commercialized in the market, and electric vehicles are the main force of new energy vehicles. Electric vehicles are divided into pure electric vehicles and hybrid vehicles, and the on-board power supply is an important part of electric vehicles, including but not limited to on-board chargers (OBC), direct current-direct current converters (DC-DC converters), products integrating on-board chargers and DC-DC converters, and switching devices are important components of on-board chargers and DC-DC converters. When the on-board power supply is working, the switching device will generate a large amount of heat, and if the heat cannot be quickly dissipated during operation, the high temperature of the switching device will adversely affect the use and service life of the on-board power supply.

[0003] The existing on-board power supply measures the temperature of the switching device through a temperature measuring device. If the temperature is too high, measures such as power reduction or over-temperature protection are taken to protect the switching device and the on-board charger. However, the temperature measuring device for measuring the temperature of the switching device in the existing on-board power supply is arranged on the circuit board, and there is a certain distance between the temperature measuring device and the switching device tube. When the switching device is working, part of the heat generated by the switching device is conducted to the temperature measuring device through the air, and the other part is conducted to the temperature measuring device through the switching device pin and the circuit board. Because the heat generated by the switching device is conducted through the air and the switching device pin and the circuit board, the thermal resistance is large, the time is long, and the temperature measuring device measures the temperature in a timely manner, and the real-time temperature monitoring is low. At the same time, the heat generating elements near the temperature measuring device in the on-board power supply also conduct heat through the air, resulting in inaccurate temperature measurement and low accuracy of the temperature measuring device.

[0004] Therefore, how to design a switching device temperature measurement structure that can accurately measure the temperature of the switching device in real time and take measures such as power reduction or over-temperature protection according to the temperature of the switching device is a technical problem that needs to be solved in the industry. SUMMARY

[0005] The purpose of the present application is to provide a switching device temperature measurement structure and an on-board charger to solve the problem that the temperature of the switching device cannot be measured accurately in real time in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is:

[0007] The application provides a temperature measuring structure of a switch device, comprising a fixing support with a through hole, at least one switch device electrically connected to a circuit board and arranged on one side of the fixing support, and at least one temperature measuring device electrically connected to the circuit board and arranged on the other side of the fixing support, and the sensing end of the temperature measuring device extends into the through hole and contacts the switch device.

[0008] Further, the fixing support comprises a side plate and an upper top plate, the side plate is provided with the through hole, the switch device and the temperature measuring device are arranged on both sides of the side plate, and the upper top plate is provided with a pin slot for fixing the pin of the switch device and a pin hole for fixing the pin of the temperature measuring device on both sides.

[0009] Further, the upper top plate comprises a first upper top plate provided with the pin slot and a second upper top plate provided with the pin hole, the first upper top plate is arranged on the top of the side plate on the side where the switch device is arranged, and the second upper top plate is arranged on the top of the side plate on the side where the temperature measuring device is arranged.

[0010] Further, the pin of the temperature measuring device extends towards the second upper top plate after being bent for multiple times and passes through the pin hole.

[0011] Further, one end of the pin hole of the second upper top plate is arc-shaped in shape.

[0012] Further, the top of one end of the pin hole of the second upper top plate is provided with an isolation groove.

[0013] Further, the fixing support is provided with positioning feet at both ends for positioning when the fixing support is arranged in the shell of a vehicle-mounted charger.

[0014] The application also provides a vehicle-mounted charger, comprising the circuit board, a shell with an open end, a flow channel side wall arranged in the shell and surrounding the shell to form a cooling liquid flow channel, a pressing member, and the temperature measuring structure of the switch device as described above arranged in the shell.

[0015] The circuit board is located at the open end of the shell, and the pressing member abuts the flow channel side wall on the side of the fixing support of the temperature measuring structure of the switch device where the switch device is arranged.

[0016] Further, the pressing member comprises a pressing fixing part, a pressing abutting part, and a pressing connecting part for connecting the pressing fixing part and the pressing abutting part, the pressing fixing part is fixedly connected to the shell through a screw, the pressing abutting part comprises a first bending part bent towards the direction close to the fixing support and a second bending part bent towards the direction away from the fixing support, and the first bending part and the second bending part are abutted at the connection.

[0017] Further, an insulating member is arranged between the pressing member and the temperature measuring device, the insulating member comprises an insulating fixed part and an insulating bent part, the insulating fixed part is pressed against the fixed support through the connection of the first bent part and the second bent part, and the insulating bent part is located between the temperature measuring device and the first bent part.

[0018] The switch device temperature measuring structure and the vehicle-mounted charger provided by the application have the following beneficial effects: compared with the prior art, the temperature measuring device is arranged on the fixed support on which the switch device is fixed, the temperature measuring device directly contacts the switch device through the through hole of the fixed support, the temperature measuring device can obtain the temperature of the switch device in real time, the thermal resistance is small, the conduction is fast, the real-time performance and the accuracy of the temperature measurement of the switch device are improved, the temperature of the switch device is monitored in real time, and measures such as power reduction or over-temperature protection are taken in time to protect the switch device and the vehicle-mounted power supply when the temperature of the switch device is too high. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Fig. 1 is an exploded schematic view of the switch device temperature measuring structure provided by the embodiment of the application;

[0021] Fig. 2 is a structural schematic view of the switch device temperature measuring structure provided by the embodiment of the application;

[0022] Fig. 3 is a top view of the switch device temperature measuring structure provided by the embodiment of the application;

[0023] Fig. 4 is a cross-sectional schematic view of the switch device temperature measuring structure provided by the embodiment of the application;

[0024] Among them, the main marks of each drawing in the figure are as follows:

[0025] 1, fixed support; 11, upper top plate; 111, pin slot; 112, pin hole; 113, first upper top plate; 114, second upper top plate; 115, isolation groove; 12, side plate; 121, through hole; 13, positioning foot; 2, switch device; 3, temperature measuring device; 4, pressing member; 41, first bent part; 42, second bent part; 421, pressure regulating hole; 43, pressing connecting part; 44, pressing fixed part; 441, connecting hole; 442, positioning hole; 45, screw; 5, insulating member. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0027] The vehicle-mounted charger provided by the present application comprises a shell, a circuit board, a flow channel side wall and a switching device temperature measuring structure. As shown in FIG. 1 and FIG. 2, the switching device temperature measuring structure comprises a fixed support 1 integrated with a switching device 2 and a temperature measuring device 3.

[0028] It should be noted that the top of the shell is provided as an open end, and the circuit board is located at the open end of the shell. The flow channel side wall is arranged in the interior of the shell and forms a cooling liquid flow channel together with the shell, and the fixed support 1 is arranged in the interior of the shell and is arranged on one side of the flow channel side wall. The switching device 2 and the temperature measuring device 3 are respectively electrically connected with the circuit board. The cooling liquid flowing in the cooling liquid flow channel of the present application can be cooling water or other cooling medium, and the switching device 2 can be but is not limited to a MOS tube, and the temperature measuring device 3 can be but is not limited to an NTC resistor.

[0029] As shown in FIG. 1 and FIG. 2, the fixed support 1 is provided with a through hole 121, the switching device 2 is arranged on one side of the fixed support 1, and the temperature measuring device 3 is arranged on the other side of the fixed support 1, and at the same time, the sensing end of the temperature measuring device 3 extends into the through hole 121 and contacts the switching device 2.

[0030] The present application is provided with the fixed support 1 integrated with the switching device 2 and the temperature measuring device 3, the temperature measuring device 3 directly contacts the switching device 2 through the through hole 121 of the fixed support 1, the temperature measuring device 3 can obtain the temperature of the switching device 2 in real time, the thermal resistance is small, the conduction is fast, the real-time performance and accuracy of the temperature measurement of the switching device 2 are improved, and thus the temperature of the switching device 2 is monitored in real time, and measures such as power reduction or over-temperature protection are taken in time to protect the switching device 2 and the vehicle-mounted power supply when the temperature of the switching device 2 is too high.

[0031] In the preferred embodiment, as shown in FIG. 1 and FIG. 2, the fixed support 1 comprises a side plate 12 and an upper top plate 11. The side plate 12 is provided with a through hole 121, the switching device 2 and the temperature measuring device 3 are installed on both sides of the side plate 12, the upper top plate 11 is perpendicularly connected with the side plate 12, and the upper top plate 11 is respectively provided with a pin groove 111 for fixing the switching device 2 and a pin hole 112 for fixing the temperature measuring device 3 on both sides.

[0032] The upper top plate 11 comprises a first upper top plate 113 provided with a pin slot 111 and a second upper top plate 114 provided with a pin hole 112. The first upper top plate 113 is arranged at the top of one side of the side plate 12 where the switch device 2 is arranged. The second upper top plate 114 is arranged at the top of the other side of the side plate 12 where the temperature measuring device 3 is arranged. The pin of the switch device 2 passes through the pin slot 111 of the first upper top plate 113 to be electrically connected to the circuit board. The pin of the temperature measuring device 3 passes through the pin hole 112 of the second upper top plate 114 to be electrically connected to the circuit board.

[0033] The pin slot 111 of the first upper top plate 113 is used to place the pin of the switch device 2, so that the switch device 2 can be positioned when the pin is welded on the circuit board. The pin hole 112 of the second upper top plate 114 is used to place the pin of the temperature measuring device 3, so that the temperature measuring device 3 can be positioned when the pin is welded on the circuit board.

[0034] In order to position the fixing support 1, the bottom of the side plate 12 is provided with a positioning foot 13 for positioning the fixing support 1 when placed in the shell. The number of positioning feet 13 can be two, and the two positioning feet 13 are arranged at both ends of the bottom of the side plate 12.

[0035] In the preferred embodiment, as shown in FIGS. 1 and 2, the fixing support 1 is pressed against the side wall of the flow channel by the pressing member 4. The pressing member 4 comprises a pressing fixing part 44, a pressing abutting part, and a pressing connecting part 43 for connecting the pressing fixing part 44 and the pressing abutting part. The pressing fixing part 44 is fixedly connected to the shell by a screw 45. The pressing abutting part comprises a first bending part 41 bent towards the direction close to the fixing support 1 and a second bending part 42 bent towards the direction away from the fixing support 1. The connection between the first bending part 41 and the second bending part 42 abuts against the fixing support 1, so that the side of the fixing support 1 provided with the switch device 2 is tightly pressed against the side wall of the flow channel, thereby making the switch device 2 adhere to the side wall of the flow channel and improving the heat dissipation effect of the switch device 2. Of course, in other embodiments, the fixing support 1 can be fixed to the side wall of the flow channel by adhesive connection, so that the pressing member 4 can be omitted.

[0036] The pressing fixing part 44, the pressing abutting part, and the pressing connecting part 43 of the pressing member 4 are integrally formed, i.e., the first bending part 41, the second bending part 42, the pressing connecting part 43, and the pressing fixing part 44 are integrally formed. The material of the pressing member 4 is selected to be elastic material, so that the switch device 2 and the fixing support 1 are pressed against the side wall of the flow channel by the elastic force of the pressing member 4. The material of the fixing support 1 is selected to be insulating material such as plastic, so as to insulate the switch device 2 and the pressing member 4. Meanwhile, the fixing support 1 can also protect the switch device 2, so as to avoid the direct contact between the pressing member 4 and the switch device 2 and prevent the pressing member 4 from damaging the switch device 2.

[0037] The bending radius of the first bending part 41 and the second bending part 42 can be reasonably designed according to the actual pressing force requirement. In addition, the first bending part 41 and / or the second bending part 42 is provided with a pressure regulating hole 421, which is used to control the pressing force of the pressing part 4 pressing against the fixed support 1. The shape of the adjusting hole can be circular, oval, rectangular or triangular. As an example, as shown in FIG. 1, the first bending part 41 is provided with an oval pressure regulating hole 421, and the second bending part 42 is provided with a reverse triangular pressure regulating hole 421. By providing the first bending part 41 and the second bending part 42 with the pressure regulating hole 421, the pressing force of the pressing part 4 pressing against the fixed support 1 can be controlled, so that the fixed support 1 can tightly adhere to the runner side wall without being pressed to break the fixed support 1 due to excessive pressing force.

[0038] The pressing and fixing part 44 is provided with a connecting hole 441 and a positioning hole 442. The connecting hole 441 is used for the screw 45 to pass through, so that the pressing part 4 is fixedly connected with the shell through the screw 45, and then the pressing part 4 is installed in the shell. The positioning hole 442 is used for the positioning pin arranged in the shell to pass through, so that the pressing part 4 is positioned when it is arranged in the shell.

[0039] The number of pressing abutting parts can be set to be multiple, and the multiple pressing abutting parts are arranged at intervals, so as to improve the elastic deformation capacity of the pressing part 4, and also adapt to the case that the surface of the fixed support 1 is uneven.

[0040] Correspondingly, one side of the fixed support 1 is provided with multiple elastic bearing positions corresponding to the multiple pressing abutting parts. When the elastic bearing position is pressed by the corresponding pressing abutting part, it deforms, so that the pressing abutting part is tightly combined with the fixed support 1, and the switch device 2 and the fixed support 1 are better pressed against the runner side wall. In addition, the elastic bearing position is provided with a heat dissipation grid to improve the heat dissipation performance. Multiple process holes are arranged at the edge of one side of the fixed support 1 close to the bottom.

[0041] As an example, as shown in FIG. 1 and FIG. 2, the pressing part 4 includes one pressing and fixing part 44, four pressing abutting parts, and one pressing connecting part 43 for connecting the four pressing abutting parts and the one pressing and fixing part 44. The pressing and fixing part 44 is provided with three connecting holes 441 arranged at intervals and two positioning holes 442 arranged at intervals.

[0042] In the preferred embodiment, as shown in FIG. 1 and FIG. 2, the pressing part 4 and the temperature measuring device 3 are provided with an insulating part 5. The insulating part 5 includes an insulating fixing part and an insulating bending part connected to the insulating fixing part. The insulating fixing part is pressed against the fixed support 1 through the connecting position of the first bending part 41 and the second bending part 42, and the insulating bending part is located between the temperature measuring device 3 and the first bending part 41.

[0043] It can be understood that the distance between the temperature measuring device 3 and the pressing piece 4 needs to be greater than 3.2 mm according to the safety regulations, but the pressing piece 4 needs to be fixed in the middle position of the fixed support 1 to better fix the switching device 2, and in order to measure the temperature of the switching device 2, the temperature measuring device 3 needs to be partially overlapped with the heat generating part (for example, the wafer position) of the switching device 2, so the distance between the temperature measuring device 3 and the pressing piece 4 is only 1.83 mm. In order not to interfere with the normal work of the temperature measuring device 3, an insulating piece 5 is arranged between the temperature measuring device 3 and the pressing piece 4, the insulating fixed part of the insulating piece 5 is fixed by the connecting part of the first bending part 41 and the second bending part 42 of the pressing piece 4, and the insulating bending part of the insulating piece 5 is bent away from the fixed support 1, which plays a role of isolating the pressing piece 4 and the temperature measuring device 3.

[0044] The vehicle-mounted charger provided by the application further comprises a control unit, which monitors the temperature of the switching device 2 by bonding the temperature measuring device 3 with the switching device 2, and the temperature comparison is timely and accurate, so that the temperature of the switching device 2 is monitored in real time, and the control unit takes measures such as power reduction or over-temperature protection to protect the switching device 2 and the vehicle-mounted power supply when the temperature of the switching device 2 is too high.

[0045] The number of the switching device 2 and the temperature measuring device 3 is not limited in the application, and can be reasonably selected according to the actual application requirements. Now several specific examples are provided as examples:

[0046] In one example, only one switching device 2 is arranged on one side of the fixed support 1, only one temperature measuring device 3 is arranged on the other side of the fixed support 1, and the switching device 2 directly contacts the temperature measuring device 3 through the through hole 121 of the fixed support 1. The temperature of the switching device 2 is monitored in real time and accurately by the temperature measuring device 3, and measures such as power reduction or over-temperature protection are taken in time to protect the switching device 2 and the vehicle-mounted power supply when the temperature of the switching device 2 is too high.

[0047] In another example, six switching devices 2 are arranged side by side on one side of the fixed support 1, six temperature measuring devices 3 are arranged side by side on the other side of the fixed support 1, the six switching devices 2 correspond to the six temperature measuring devices 3 one by one, and each switching device 2 directly contacts the corresponding temperature measuring device 3 through the through hole 121 of the fixed support 1. The temperature of the corresponding switching device 2 is monitored in real time and accurately by the temperature measuring device 3, and measures such as power reduction or over-temperature protection are taken in time to protect the six switching devices 2 and the vehicle-mounted power supply when the temperature of any one of the switching devices 2 is too high.

[0048] In another example, six switching devices 2 are arranged side by side on one side of the fixing support 1, and only one temperature measuring device 3 is arranged on the other side of the fixing support 1. The temperature measuring device 3 is in direct contact with one of the six switching devices 2 through the through hole 121 of the fixing support 1. It should be understood that the six switching devices 2 work synchronously, and the temperatures of the six switching devices 2 are close to each other. By measuring the temperature of one of the switching devices 2, power reduction or over-temperature protection measures can be taken in time when the temperature of the switching device 2 is too high to protect the six switching devices 2 and the vehicle-mounted power supply.

[0049] For ease of understanding, the following will be described by taking the fixing support 1 provided with one switching device 2 and one temperature measuring device 3 as an example:

[0050] As shown in FIGS. 1 and 4, the side plate 12 is provided with a through hole 121 penetrating through itself. One side surface of the side plate 12 is tightly attached to one side surface of the switching device 2. The length of the through hole 121 is less than the length of the sensing end of the temperature measuring device 3, so that a part of the sensing end of the temperature measuring device 3 extends into the through hole 121, and the other part is exposed outside. The installation of the temperature measuring device 3 is more convenient.

[0051] In addition, the through hole 121 is provided with heat-conducting glue. The heat-conducting glue fills the gap part in the through hole 121 except the body of the temperature measuring device 3, so that the switching device 2 and the sensing end of the temperature measuring device 3 are attached and connected through the heat-conducting glue. The material of the heat-conducting glue can be epoxy resin material.

[0052] As shown in FIG. 1, the pin of the temperature measuring device 3 is arranged in a multiple bending manner. After being bent multiple times, the pin of the temperature measuring device 3 extends towards the second upper top plate 114 and penetrates through the pin hole 112. It can be understood that, in order to ensure the electrical safety distance between the pin of the temperature measuring device 3 and the pin of the temperature measuring device 3, and at the same time ensure that the pin hole 112 machined on the second upper top plate 114 has a certain strength, it is required that the distance between the pin hole 112 and the edge of the second upper top plate 114 is greater than 3 mm. However, if the second upper top plate 114 is to be extended, it will affect the fixing screw 45. Therefore, as shown in FIG. 1, the pin of the temperature measuring device 3 is bent three times, and the pin of the temperature measuring device 3 is integrally formed.

[0053] As shown in FIGS. 1 and 3, the end of the second upper top plate 114 provided with the pin hole 112 is provided with an isolation groove 115 at the top. The groove depth of the isolation groove 115 is greater than or equal to 0.5 mm. The isolation groove 115 is arranged to have a gap between the second upper top plate 114 and the circuit board, which is easy to dissipate heat. At the same time, the distance between the pin hole 112 and the edge of the second upper top plate 114 is greater than 3 mm, which ensures a certain strength and is also beneficial to the machining of the pin hole 112. The pin groove 111 of the first upper top plate 113 can also have a gap between the first upper top plate 113 and the circuit board, which is easy to dissipate heat.

[0054] As shown in Fig. 3, one end edge of the second upper top plate 114 is arc-shaped, which is designed to avoid the installation path of the screw 45 to prevent the screw 45 from being blocked. According to the design specification, the outer cap diameter of the screw 45 is 8 mm, and the avoidance range is 12 mm in diameter.

[0055] The application sets a temperature measuring device on a fixing support fixed with a switching device, the temperature measuring device directly contacts the switching device through a through hole of the fixing support, and the temperature measuring device is connected with the switching device through a heat-conducting adhesive, so that the temperature measuring device can obtain the temperature of the switching device in real time, the thermal resistance is small, the conduction is fast, and the real-time performance and accuracy of measurement are improved, thereby, when the temperature of the switching device is too high, power reduction or over-temperature protection measures are taken in time to protect the switching device and the vehicle-mounted power supply.

[0056] The application comprehensively considers the design of the temperature measuring device body (i.e. the sensing end) positioning structure and the pin positioning structure, the design of the pin bending structure, the design of fixing the temperature measuring device body in the fixing support, the design of the insulating part, the assembly design of the temperature measuring device, the positioning of the fixing support in the vehicle-mounted charger, and the fixation of the fixing support. Among them, the design of the temperature measuring device body positioning structure and the pin positioning structure solves the positioning problem of the temperature measuring device on the fixing support; the design of the pin bending structure and the design of the insulating part ensure the safe and standard distance between electrical devices in a relatively limited space, and also avoid the assembly of the screw used to fix the compression part, ensuring that there is enough assembly distance when installing the screw; the design of fixing the temperature measuring device body in the fixing support uses an epoxy resin material consistent with the material of the temperature measuring device body, which stably adheres the body to the surface of the switching device and effectively increases the contact area between the temperature measuring device body and the switching device, enhancing heat conduction; the assembly design of the temperature measuring device makes the installation of the temperature measuring device simple and convenient, and the body is directly adhered to the surface of the switching device to directly monitor the temperature of the switching device, which is more accurate than the existing indirect temperature measuring scheme. The positioning of the fixing support is combined with the positioning structure of the vehicle-mounted charger through two positioning feet and a positioning surface to limit itself beside the temperature measuring area, which makes the switching device heat conduction area effectively adhere to the temperature measuring area, the temperature measuring device directly contacts the switching device to obtain the temperature of the switching device in real time; the fixation of the fixing support is realized through the compression part and the screw. By designing the structure of the compression part and the positioning structure on the shell, the compression part can effectively fix the fixing support after the screw is locked, and the compression force is neither too large to crush the switching device nor too small to cause the switching device to loosen under external vibration and impact.

[0057] The above only describes the preferred embodiments of the application and is not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A temperature measuring structure for a switching device, characterized by The application relates to a switch-temperature measuring structure, which comprises a fixed support (1) provided with a through hole (121), at least one switch device (2) electrically connected to a circuit board and arranged on one side of the fixed support (1), and at least one temperature measuring device (3) electrically connected to the circuit board and arranged on the other side of the fixed support (1), wherein the sensing end of the temperature measuring device (3) extends into the through hole (121) and is in contact with the switch device (2). The fixed support (1) comprises a side plate (12) and an upper top plate (11), the side plate (12) is provided with the through hole (121), the switch device (2) and the temperature measuring device (3) are arranged on the two sides of the side plate (12), and the two sides of the upper top plate (11) are respectively provided with a pin slot (111) for fixing the switch device (2) and a pin hole (112) for fixing the temperature measuring device (3).

2. The temperature measuring structure for a switching device according to claim 1, wherein The upper top plate (11) comprises a first upper top plate (113) provided with the pin slot (111) and a second upper top plate (114) provided with the pin hole (112), the first upper top plate (113) is arranged on the top of the side plate (12) on the side where the switch device (2) is arranged, and the second upper top plate (114) is arranged on the top of the side plate (12) on the side where the temperature measuring device (3) is arranged.

3. The temperature measuring structure for a switching device according to claim 2, wherein The pin of the temperature measuring device (3) extends towards the second upper top plate (114) after being bent for multiple times and passes through the pin hole (112).

4. The temperature measuring structure for a switching device according to claim 3, wherein One end of the second upper top plate (114) provided with the pin hole (112) is arc-shaped in shape.

5. The temperature measuring structure for a switching device according to claim 3, wherein The top of one end of the second upper top plate (114) provided with the pin hole (112) is provided with a separation groove (115).

6. The temperature measuring structure for a switching device according to claim 3, wherein The fixed support (1) is provided with positioning feet (13) at both ends for positioning when the fixed support (1) is arranged in the shell of a vehicle-mounted charging machine.

7. The temperature measurement structure for a switching device according to claim 1, wherein The application relates to a switch-temperature measuring structure, which comprises a fixed support (1) provided with a through hole (121), at least one switch device (2) electrically connected to a circuit board and arranged on one side of the fixed support (1), and at least one temperature measuring device (3) electrically connected to the circuit board and arranged on the other side of the fixed support (1), wherein the sensing end of the temperature measuring device (3) extends into the through hole (121) and is in contact with the switch device (2).

8. An on-board charger, characterized by, The fixed support (1) comprises a side plate (12) and an upper top plate (11), the side plate (12) is provided with the through hole (121), the switch device (2) and the temperature measuring device (3) are arranged on the two sides of the side plate (12), and the two sides of the upper top plate (11) are respectively provided with a pin slot (111) for fixing the switch device (2) and a pin hole (112) for fixing the temperature measuring device (3). The upper top plate (11) comprises a first upper top plate (113) provided with the pin slot (111) and a second upper top plate (114) provided with the pin hole (112), the first upper top plate (113) is arranged on the top of the side plate (12) on the side where the switch device (2) is arranged, and the second upper top plate (114) is arranged on the top of the side plate (12) on the side where the temperature measuring device (3) is arranged. The pin of the temperature measuring device (3) extends towards the second upper top plate (114) after being bent for multiple times and passes through the pin hole (112).

9. The vehicle charger of claim 8, wherein, One end of the second upper top plate (114) provided with the pin hole (112) is arc-shaped in shape. The top of one end of the second upper top plate (114) provided with the pin hole (112) is provided with a separation groove (115). The fixed support (1) is provided with positioning feet (13) at both ends for positioning when the fixed support (1) is arranged in the shell of a vehicle-mounted charging machine. The application relates to a switch-temperature measuring structure, which comprises a fixed support (1) provided with a through hole (121), at least one switch device (2) electrically connected to a circuit board and arranged on one side of the fixed support (1), and at least one temperature measuring device (3) electrically connected to the circuit board and arranged on the other side of the fixed support (1), wherein the sensing end of the temperature measuring device (3) extends into the through hole (121) and is in contact with the switch device (2). The fixed support (1) comprises a side plate (12) and an upper top plate (11), the side plate (12) is provided with the through hole (121), the switch device (2) and the temperature measuring device (3) are arranged on the two sides of the side plate (12), and the two sides of the upper top plate (11) are respectively provided with a pin slot (111) for fixing the switch device (2) and a pin hole (112) for fixing the temperature measuring device (3). The upper top plate (11) comprises a first upper top plate (113) provided with the pin slot (111) and a second upper top plate (114) provided with the pin hole (112), the first upper top plate (113) is arranged on the top of the side plate (12) on the side where the switch device (2) is arranged, and the second upper top plate (114) is arranged on the top of the side plate (12) on the side where the temperature measuring device (3) is arranged. The pin of the temperature measuring device (3) extends towards the second upper top plate (114) after being bent for multiple times and passes through the pin hole (112). One end of the second upper top plate (114) provided with the pin hole (112) is arc-shaped in shape. The top of one end of the second upper top plate (114) provided with the pin hole (112) is provided with a separation groove (115). The fixed support (1) is provided with positioning feet (13) at both ends for positioning when the fixed support (1) is arranged in the shell of a vehicle-mounted charging machine.

10. The vehicle charger of claim 9, wherein, An insulating piece (5) is arranged between the pressing piece (4) and the temperature measuring device (3), the insulating piece (5) comprises an insulating fixed part and an insulating bent part, the insulating fixed part is pressed against the fixed support (1) through the connection between the first bent part (41) and the second bent part (42), and the insulating bent part is located between the temperature measuring device (3) and the first bent part (41).

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