Temperature detection device and terminal

Abstract

The utility model discloses a temperature detection device and terminal relates to new energy automobile charging technical field, solved the problem of high cost and inaccurate temperature measurement in prior art. The utility model discloses a PCBA circuit board, the PCBA circuit board includes PCB board, thermistor and signal pin, the signal pin is welded on the PCB board, is equipped with at least one PTH hole and thermistor of signal pin electric connection on the PCB board, and thermistor measures the temperature of PCB board surface and passes signal pin and transmits thermistor signal, another provide a kind of integrally formed stamping terminal matched with PCBA circuit board, temperature measuring reed is evenly distributed and is equipped on the periphery of terminal body, the lower part of terminal body is equipped with the several pinholes of the periphery even distribution and inserts reed, the upper part of terminal body is equipped with mounting, terminal body is designed with two kinds of structures of elastic claw and no elastic claw, select the terminal with elastic claw, it can be used for the quick fixed connection between terminal and charging socket shell, improve production assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle charging technology, and in particular to a temperature detection device and terminal. Background Technology

[0002] With the rapid development of new energy vehicle charging technology and the continuous improvement of electric vehicle charging efficiency, installing temperature detection devices in car charging sockets can greatly improve the safety of charging equipment. Many manufacturers use methods such as mounting thermistors inside terminal machining holes or soldering thermistors onto circuit boards, utilizing thermally conductive rubber for heat transfer between the thermistors and terminals. However, these methods have the following drawbacks:

[0003] (1) The terminals are machined or cold-forged, which is costly.

[0004] (2) Installing springs or contact springs on the terminals requires additional parts, which increases costs.

[0005] (3) Thermally conductive rubber is used for heat transfer between the terminal and the thermistor. The thermal conductivity is low, and the temperature detected by the thermistor is significantly different from the actual temperature of the terminal. After the thermally conductive rubber ages, the temperature difference is further increased, causing thermal runaway during charging.

[0006] To address the issues of high cost and inaccurate temperature measurement, this invention provides a low-cost, stampable terminal and temperature detection solution. Utility Model Content

[0007] In view of the shortcomings in the above-mentioned background technology, this utility model proposes a temperature detection device and terminal, which solves the problems of high cost and inaccurate temperature measurement in the prior art.

[0008] The technical solution of this utility model is implemented as follows: A temperature detection device includes a PCBA circuit board, the PCBA circuit board includes a PCB board, a thermistor and a signal pin header, the signal pin header is soldered to the PCB board, the PCB board is provided with at least one PTH hole and a thermistor electrically connected to the signal pin header, the thermistor measures the temperature of the PCB board surface and transmits the thermistor signal through the signal pin header.

[0009] More preferably, the PCB board has a thermally conductive copper-clad component and a PTH hole in the middle part to cooperate with the thermistor, and the PTH hole is connected to the thermally conductive copper-clad component.

[0010] More preferably, the thermally conductive copper-clad component includes an embedded portion embedded in the PCB board and an annular contact portion flush with the end face of the PCB board. The thickness of the embedded portion is less than the thickness of the annular contact portion, and at least one thermistor is provided above the embedded portion.

[0011] A terminal includes a temperature detection device and a terminal body. The terminal body has temperature sensing springs evenly distributed around its circumference to cooperate with a PCBA circuit board. The lower part of the terminal body has a plurality of pinhole-connecting springs evenly distributed around its circumference. The upper part of the terminal body has a mounting component.

[0012] More preferably, the lower part of the terminal is provided with evenly distributed spring claws arranged circumferentially, the lower part of the spring claws is connected to the terminal body, and the spring claws are located between the temperature measuring spring and the pinhole insertion spring.

[0013] More preferably, the temperature-sensing spring is a plurality of evenly distributed arc-shaped springs, and the temperature-sensing spring and the terminal body are integrally formed.

[0014] More preferably, the mounting component is a welding part, and the lower part of the welding part is connected to the terminal body.

[0015] More preferably, the welding part is a welding plate, and the welding plate and the terminal body are integrally formed.

[0016] More preferably, the mounting component is a crimping part, the lower part of which is connected to the terminal body, and the crimping part and the terminal body are integrally formed.

[0017] More preferably, the crimping part includes a first U-shaped plate and a second U-shaped plate with two side plates that can be bent inward. The length of the side plate of the second U-shaped plate is less than or equal to the length of the bottom plate of the second U-shaped plate, and the sum of the lengths of the two side plates of the second U-shaped plate is greater than the length of the bottom plate of the second U-shaped plate. The second U-shaped plate is connected to the terminal body through the first U-shaped plate to form an integral structure.

[0018] The beneficial effects of this utility model are as follows: This utility model has a simple structure. The thermistor is mounted on the PCB board to measure the temperature of the PCB board and can quickly transmit the temperature signal through the signal pin header. This device can quickly and securely connect to the charging socket housing, improving production assembly efficiency. The PCB board has a PTH hole, and the temperature-sensing spring is in close contact with the PTH hole in the PCB board. The heat from the terminal is transferred sequentially through the temperature-sensing spring, the PTH hole, and the thermally conductive copper layer to the surface of the PCB board. The thermistor soldered to the surface of the PCB board measures the surface temperature of the PCB board, thereby realizing the temperature detection of the terminal. The front end of the stamped terminal is designed with either a spring claw or no spring claw structure. Terminals with spring claws are preferred, as they can be used for quick and secure connection between the terminal and the charging socket housing, improving production assembly efficiency. The tail end of the stamped terminal is designed with either a welding part or a crimping part structure, facilitating the selection of wire connection methods. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is the front view of the present invention;

[0022] Figure 3 This is a top-view cross-sectional view of the PCBA circuit board;

[0023] Figure 4 This is a schematic diagram of the structure of a thermally conductive copper-clad component;

[0024] Figure 5 This is a schematic diagram of the terminal body.

[0025] Figure 6 This is a schematic diagram of the crimping part;

[0026] Figure 7 This is a partial schematic diagram of the terminal body.

[0027] In the diagram: 100, PCBA circuit board; 110, thermistor; 120, signal pin header; 130, PCB board; 131, thermally conductive copper-clad component; 132, PTH hole; 133, embedded part; 134, annular contact part; 200, terminal body; 210, soldering part; 220, temperature sensing spring; 230, spring claw; 240, pin-hole interlocking spring; 250, crimping part; 251, first U-shaped plate; 252, second U-shaped plate. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1-7As shown in Embodiment 1, a temperature detection device includes a PCBA circuit board 100. The PCBA circuit board 100 includes a PCB board 130, a thermistor 110, and a signal header 120. The signal header 120 is soldered onto the PCB board 130. The thermistor 110, electrically connected to the signal header 120, measures the temperature of the surface of the PCB board 130 and transmits its signal through the signal header 120. When a terminal is installed in the PTH hole 132, the thermistor measures the temperature of the terminal on the circuit board. The signal header 120, soldered onto the PCB board 130 and connected to the thermistor 110, can transmit the signal from the thermistor 110.

[0030] In this embodiment, the PCB board 130 has a thermally conductive copper-clad component 131 and a PTH hole 132 in the middle, which cooperate with the thermistor 110. The PTH hole 132 communicates with the thermally conductive copper-clad component 131. The PCB board 130 for terminal temperature detection has at least one terminal through hole, which is the PTH hole 132, and communicates with the thermally conductive copper-clad component in the PCB board 130. The thermally conductive copper-clad component is located in the middle layer of the PCB board 130. The thermally conductive copper-clad component 131 includes an embedded part 133 embedded in the PCB board 130 and an annular contact part 134 flush with the end face of the PCB board 130. The thickness of the embedded part 133 is less than the thickness of the annular contact part 134. At least one thermistor 110 is provided above the embedded part 133. Thermistor 110 is a surface mount resistor, soldered on top of thermally conductive copper-clad component 131. The thermally conductive copper-clad component 131 and thermistor 110 are insulated with FR-4 material, which has both thermal conductivity and insulation functions.

[0031] like Figures 1-4 As shown in Embodiment 2, a terminal includes a temperature detection device and a terminal body 200. The terminal body 200 has temperature-sensing springs 220 evenly distributed circumferentially to mate with a PCBA circuit board 100. The lower part of the terminal body 200 has a plurality of circumferentially evenly distributed pinhole-connecting springs 240, and the upper part of the terminal body 200 has a mounting component. The terminal body has a simple structure. The temperature-sensing springs 220 are interference-fitted with the PTH holes 132 on the PCBA circuit board, enabling quick and easy connection with the charging socket housing, improving production assembly efficiency. The temperature-sensing springs 220 are used to install on the PCBA circuit board 100 to measure the terminal temperature.

[0032] In this embodiment, the lower part of the terminal is further provided with evenly distributed circumferentially arranged spring claws 230. The lower part of the spring claws 230 is connected to the terminal body 200, and the spring claws 230 are located between the temperature sensing spring 220 and the pinhole insertion spring 240. The temperature sensing spring 220 is a plurality of evenly distributed arc-shaped springs, and the temperature sensing spring 220 and the terminal body 200 are integrally formed. The front end of the stamped terminal is designed with two structures: one with spring claws 230 and the other without spring claws 230. It is preferable to use the terminal with spring claws 230, which can be used for quick fixed connection between the terminal and the charging socket housing, improving production assembly efficiency.

[0033] All other structures are the same as in Example 1.

[0034] like Figure 5 and 6 As shown in Embodiment 3, a terminal is provided. The mounting component is a welding part 210, the lower part of which is connected to the terminal body 200. The welding part 210 is a welding plate, and the welding plate and the terminal body 200 are integrally formed. The mounting component is a crimping part 250, the lower part of which is connected to the terminal body 200, and the crimping part 250 and the terminal body 200 are integrally formed. The crimping part 250 includes a first U-shaped plate 251 and a second U-shaped plate 252 with two side plates that can be bent inward. The length of the side plate of the second U-shaped plate 252 is less than or equal to the length of the bottom plate of the second U-shaped plate 252, and the sum of the lengths of the two side plates of the second U-shaped plate 252 is greater than the length of the bottom plate of the second U-shaped plate 252. The second U-shaped plate 252 is connected to the terminal body 200 as an integral structure through the first U-shaped plate 251. The stamped terminal tail end is designed with both a welding part 210 and a crimping part 250, which facilitates the selection of wire connection methods.

[0035] The specific structure is as follows: a PTH hole 132 is provided on the PCB board 130, and the temperature sensing spring 220 is in close contact with the PTH hole 132 in the PCB board 130. The heat of the terminal is transferred to the PTH hole 132 in the PCB board 130 through the temperature sensing spring 220. The PTH hole 132 is connected to the thermally conductive copper-clad component 131 in the PCB board 130. The heat of the terminal is transferred to the thermally conductive copper-clad component 131 through the PTH hole 132, and then to the surface of the PCB board 130. The thermistor 110 soldered on the surface of the PCB board 130 measures the surface temperature of the PCB board 130, thereby realizing the temperature detection of the terminal. A stamped terminal for use with a temperature detection device includes a terminal body 200 with temperature sensing springs 220 evenly distributed circumferentially, a number of pinhole-connecting springs 240 evenly distributed circumferentially at the lower part of the terminal body 200, and a mounting component at the upper part of the terminal body 200. The terminal body 200 is designed with two structures: one with spring claws and one without spring claws. Preferably, the terminal with spring claws 240 is selected, which can be used for quick fixed connection between the terminal and the charging socket housing, thereby improving production and assembly efficiency.

[0036] The specific temperature measurement principle is as follows: a low-cost stamped terminal, which includes a pinhole spring 240 and a temperature-sensing spring 220; the pinhole spring 240 is connected to the charging gun pin for current transmission; the temperature-sensing spring 220 in the stamped terminal is in close contact with the PTH hole 132 in the PCB board 130, and the terminal heat is transferred to the PTH hole 132 in the PCB board 130 through the structure of the temperature-sensing spring 220. The PTH hole 132 is connected to the thermally conductive copper-clad component in the PCB board 130, and the terminal heat is transferred to the thermally conductive copper-clad component through the PTH hole 132, and then to the surface of the PCB board 130. The thermistor 110 soldered on the surface of the PCB board 130 measures the surface temperature of the PCB board 130, thereby realizing the temperature detection of the terminal.

[0037] All other structures are the same as in Example 2.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A temperature detection device, comprising a PCBA circuit board (100), wherein the PCBA circuit board (100) includes a PCB board (130), a thermistor (110), and signal headers (120), characterized in that: The signal pin (120) is soldered onto the PCB board (130). The PCB board (130) has at least one PTH hole (132) and a thermistor (110) electrically connected to the signal pin (120). The thermistor (110) measures the temperature of the PCB board (130) and transmits the signal of the thermistor (110) through the signal pin (120).

2. The temperature detection device according to claim 1, characterized in that: The PCB board (130) has a thermally conductive copper-clad part (131) and a PTH hole (132) in the middle, which cooperate with the thermistor (110). The PTH hole (132) is connected to the thermally conductive copper-clad part (131).

3. The temperature detection device according to claim 2, characterized in that: The thermally conductive copper-clad component (131) includes an embedded part (133) embedded in the PCB board (130) and an annular contact part (134) flush with the end face of the PCB board (130). The thickness of the embedded part (133) is less than the thickness of the annular contact part (134). At least one thermistor (110) is provided above the embedded part (133).

4. A terminal, characterized in that: The temperature detection device includes any one of the following: a terminal body (200), wherein temperature sensing springs (220) that cooperate with PCBA circuit board (100) are evenly distributed around the terminal body (200), a plurality of pinhole interlocking springs (240) evenly distributed around the lower part of the terminal body (200) are provided, and a mounting component is provided on the upper part of the terminal body (200).

5. The terminal according to claim 4, characterized in that: The lower part of the terminal is also provided with evenly distributed spring claws (230) arranged in a circumferential direction. The lower part of the spring claws (230) is connected to the terminal body (200). The spring claws (230) are located between the temperature measuring spring (220) and the pinhole insertion spring (240).

6. The terminal according to claim 4 or 5, characterized in that: The temperature measuring spring (220) consists of several evenly distributed arc-shaped springs, and the temperature measuring spring (220) and the terminal body (200) are integrally formed.

7. The terminal according to claim 6, characterized in that: The mounting component is a welding part (210), and the lower part of the welding part (210) is connected to the terminal body (200).

8. The terminal according to claim 7, characterized in that: The welding part (210) is a welding plate, and the welding plate and the terminal body (200) are integrally formed.

9. The terminal according to claim 6, characterized in that: The mounting component is a crimping part (250), the lower part of which is connected to the terminal body (200), and the crimping part (250) and the terminal body (200) are integrally formed.

10. The terminal according to claim 9, characterized in that: The crimping part (250) includes a first U-shaped plate (251) and a second U-shaped plate (252) with two side plates that can be bent inward. The length of the side plate of the second U-shaped plate (252) is less than or equal to the length of the bottom plate of the second U-shaped plate (252), and the sum of the lengths of the two side plates of the second U-shaped plate (252) is greater than the length of the bottom plate of the second U-shaped plate (252). The second U-shaped plate (252) is connected to the terminal body (200) as an integral structure through the first U-shaped plate (251).

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