Testing device for current-withstanding circulation test of connection joint for conductive charging of electric vehicle

Abstract

The utility model discloses a current-withstanding circulation test device for a connector for conductive charging of an electric automobile, which comprises a power supply and a test box, and a plurality of groups of test assemblies connected in series are arranged in the test box. Each group of test assemblies comprises a first tool used for connecting and fixing the first connecting terminal and a second tool used for connecting and fixing the second connecting terminal, one of the first connecting terminal and the second connecting terminal installed on each group of test assemblies is a tested sample, and the other connecting terminal is a test part; the first tool comprises a fixing clip and a first quick connector used for electrically connecting the first connecting terminal with a wire at one end of a test assembly, and the second tool comprises a second quick connector used for electrically connecting the second connecting terminal with a wire at the other end of the test assembly. And the fixing clip, the first quick connector and the second quick connector are connected with corresponding resistance measuring probes. According to the utility model, the test efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to a current cycle resistance test device for a connection joint used for conductive charging of an electric vehicle. Background Art

[0002] GB / T 20234.1-2023 "Connection devices for conductive charging of electric vehicles Part 1: General requirements" has made relevant provisions on the durability of vehicle interfaces. According to the regulations, the charging connector must undergo a current cycle test. The quality of the key components of the electric vehicle charging interface, the terminal ends, wires, and contacts, seriously affects the durability of the connection.

[0003] Currently, there are two main methods for current cycle resistance testing of electric vehicle charging interfaces.

[0004] The first method involves customizing various test fixtures in the lab to accommodate samples of varying types and specifications. The test samples are then tested using fixed charging connectors and pre-embedded test ports. The second method involves manually setting up the test environment in the lab and periodically recording the required data using a handheld device.

[0005] The first method involves large tolerances in the tooling prepared for the sample, which can lead to poor contact and affect the accuracy of the test data. The maintenance cost of multi-specification tooling is high, and in actual operation, manual operation of the equipment is required to collect and verify the data, which limits the improvement in test efficiency. The second method can eliminate test data inaccuracies caused by tooling tolerances, but the test operation requires more precautions, is inconvenient and labor-intensive, and is time-consuming and labor-intensive. Experimental data is prone to recording errors or omissions due to human factors, resulting in low precision and accuracy in data collection, and it is impossible to intuitively determine whether the test data meets the standard requirements.

[0006] Both of the above methods have the problems of inconvenient and inefficient operation, difficult data traceability, poor repeatability, and low test efficiency. Utility Model Content

[0007] The purpose of the utility model is to provide a current cycle resistance test device for a connection connector for conductive charging of an electric vehicle, so as to improve the test efficiency and the accuracy of the test results.

[0008] The technical solution of the utility model is as follows:

[0009] A current cycling test device for conductive charging connectors for electric vehicles includes a power supply and an entirely insulated, enclosed test chamber. Multiple test assemblies connected to the power supply are disposed within the test chamber. Each test assembly includes a first fixture for connecting and fixing a first connection terminal and a second fixture for connecting and fixing a second connection terminal. The first and second connection terminals form a pair of charging connectors with concave-convex mating configurations. The first connection terminal is a concave connection terminal, and the second connection terminal is a convex connection terminal. One of the first and second connection terminals installed on each test assembly is a test sample, and the other is a test component. The first fixture includes a fixing clip for fixing the first connection terminal and a first quick connector for electrically connecting the first connection terminal to a wire at one end of the test assembly. The second fixture includes a second quick connector for electrically connecting the second connection terminal to a wire at the other end of the test assembly. The fixing clip, the first quick connector, and the second quick connector are each connected to a corresponding resistance measuring probe. Each resistance measuring probe is connected to a multi-channel ohmmeter data recorder, which is connected to a host computer for configuring test parameters.

[0010] The present invention adopts a first quick connector and a second quick connector to realize the electrical connection between the connection terminal and the power supply to build a test circuit. The fixing clip is an adjustable clamp that can clamp and fix terminal ends of different specifications. The first quick connector, the fixing clip and the second quick connector of the present invention are all connected with corresponding resistance measuring probes, which are used to test the resistance at the connection between the connection terminal and the wire, as well as the contact resistance at the connection between the two connection terminals. The measurement data is recorded by a data recorder and uploaded to the host computer for storage, so as to intuitively judge whether the test data meets the standard requirements and save the original test data for traceability. The first connection terminal and the second connection terminal of the present invention can be directly connected and fixed inside the test device to realize resistance testing, eliminate wiring, make the test operation more convenient and quick, and improve the test efficiency.

[0011] The utility model also has the following preferred designs:

[0012] The test box of the present invention is also provided with a temperature sensor to record ambient temperature data as needed.

[0013] The fixing clip, the first quick connector and the second quick connector of the present invention are all provided with a resistance probe measurement position, so as to facilitate the embedded installation of the resistance measuring probe.

[0014] The utility model also includes a contact resistance measuring probe for testing the resistance at the connection between the first connection terminal and the second connection terminal, and measures the resistance data at the connection between the connection terminals in a variety of ways.

[0015] The voltage output range of the power supply of the present invention is 0-1500V, and the current output range is 0-2000A. The power supply is connected to the host computer through network communication.

[0016] The working power supply of the temperature sensor of the present invention is 3.0-5.5V / DC, the temperature measurement range is -55°C-+125°C, and the inherent temperature measurement error is ±1°C.

[0017] The power supply and the host computer are both arranged outside the test box.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The utility model adopts a first quick connector and a second quick connector to realize the electrical connection between the connection terminal and the power supply to build a test circuit. The fixing clip is an adjustable fixture that can clamp and fix terminal ends of different specifications, and has a wide range of applications.

[0020] 2. The first quick connector, the fixing clip, and the second quick connector of the utility model are all connected with corresponding resistance measuring probes, which are used to test the resistance at the connection between the connection terminal and the wire, as well as the contact resistance at the connection between the two connection terminals. The measured data is recorded by a data recorder and uploaded to the host computer for storage. The ambient temperature in the device, the test current setting value, the resistance at the connection between the terminal end and the wire, and the contact resistance of the contact are recorded by the host computer according to the configuration cycle. Automatic control of current on and off is achieved, and the ambient temperature data is recorded according to the test requirements, the resistance at the terminal end connection is processed, and the test data is automatically exported. It can speed up the progress of the current cycle test, improve the safety and accuracy of the test process, and facilitate the continuous testing of long-term projects.

[0021] 3. The first and second connection terminals of the present invention can be directly connected and fixed inside the test box to achieve resistance testing, eliminating wiring, making the test operation more convenient and quick, and improving test efficiency. During the test process, except for the initial installation of the tested connection terminals, the test device cover needs to be opened. Test data can be collected without opening the device during the test. The disturbance to the test environment is small, the test accuracy is high, and no manual measurement is required, reducing the risk during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a working principle diagram of a current cycle resistance test device for a conductive charging connection connector for electric vehicles provided by the utility model.

[0023] Figure 2 This is a diagram of the test box frame and internal structure of the utility model;

[0024] Figure 3 for Figure 2 A top view of

[0025] Figure 4 is a perspective view of the first quick connector in the embodiment;

[0026] Figure 5 This is a three-dimensional diagram of the first tooling and the connecting terminal being connected and fixed in the embodiment;

[0027] Figure 6 Schematic diagram of the connection between the first connecting terminal and the second connecting terminal in the embodiment;

[0028] Figure 7 for Figure 6 A three-dimensional diagram of the connection between the first connecting terminal and the second connecting terminal.

[0029] Description of reference numerals:

[0030] 1-Power supply; 2-Test box; 3-Temperature sensor; 4-First tooling; 4a-Fixing clip; 4b-First quick connector; 5-Second tooling; 5a-Second quick connector; 6-Resistance measuring probe; 7-Data recorder; 8-Upper computer; 8a-First mounting plate; 9-Contact resistance measuring probe; 9a-Second mounting plate; 10-First connecting terminal; 11-Second connecting terminal; 12-Resistance probe measuring position. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more apparent, the following exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described in this utility model, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present utility model.

[0032] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0033] It should be understood that the present invention can be implemented in different forms and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and will fully convey the scope of the present invention to those skilled in the art.

[0034] The purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present invention. When used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0035] In order to fully understand the present invention, a detailed structure will be provided in the following description to illustrate the technical solution proposed by the present invention. The optional embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may also have other implementation methods.

[0036] like Figures 1 to 7 As shown, a current cycle resistance test device for a conductive charging connection connector of an electric vehicle includes a power supply 1 and an integrally insulated and enclosed test box 2. A plurality of test components connected in series to the power supply 1 are arranged in the test box 2. Each test component includes a first fixture 4 for connecting and fixing a first connection terminal 10 and a second fixture 5 for connecting and fixing a second connection terminal 11. The first connection terminal 10 and the second connection terminal 11 are a pair of charging connection connectors with concave and convex matching. The first connection terminal 10 is a concave connection terminal and the second connection terminal 11 is a convex connection terminal. One of the first connection terminal 10 and the second connection terminal 11 installed on each test component is a test sample, and the other connection terminal is a test sample. The sub-assembly is a test component. The first tooling 4 includes a fixing clip 4a for fixing the first connecting terminal 10, and a first quick connector 4b for electrically connecting the first connecting terminal 10 to the wire at one end of the test assembly. The second tooling 5 includes a second quick connector 5a for electrically connecting the second connecting terminal 11 to the wire at the other end of the test assembly. The fixing clip 4a, the first quick connector 4b and the second quick connector 5a are all connected to corresponding resistance measuring probes 6. Each resistance measuring probe 6 is connected to a multi-channel ohmmeter data recorder 7. The data recorder 7 is connected to a host computer 8 for configuring test parameters. Among them, the first quick connector 4b and the second quick connector 5a can adopt the same structure to achieve electrical connection between the connecting terminal and the wire.

[0037] It should be noted that the figures of this embodiment only illustrate the frame structure and partial internal structure of test box 2. Test box 2 can be a closed box with an upper cover and require overall insulation. In the figure, first mounting plate 8a is used to set up the network of host computer 8 and install the data busbar.

[0038] In one embodiment, a temperature sensor 3 is further provided in the test box 2 to record ambient temperature data as needed.

[0039] In one embodiment, resistance probe measurement positions 12 are reserved on the fixing clip 4a, the first quick connector 4b and the second quick connector 5a to facilitate embedded installation of the resistance measuring probe, thereby achieving resistance measurement without wiring.

[0040] In one embodiment, a contact resistance measuring probe 9 is further included for testing the resistance at the connection between the first connection terminal 10 and the second connection terminal 11. The resistance data at the connection between the connection terminals is measured in a variety of ways. The second mounting plate 9a is used to mount the contact resistance measuring probe 9.

[0041] In one embodiment, the voltage output range of the power supply 1 is 0-1500V, and the current output range is 0-2000A. The power supply 1 is connected to the host computer 8 via network communication.

[0042] In one embodiment, the operating power supply of the temperature sensor 3 is 3.0 to 5.5 V / DC, the temperature measurement range is -55°C to +125°C, and the inherent temperature measurement error is ±1°C.

[0043] In one embodiment, the power supply 1 and the host computer 8 are both arranged outside the test box.

[0044] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A test device for current cycle resistance test of a conductive charging connector for an electric vehicle, comprising a power supply, characterized in that: The device also includes an entirely insulated, enclosed test chamber, wherein a plurality of test assemblies connected in series to the power supply are disposed within the test chamber. Each test assembly group includes a first fixture for connecting and fixing a first connection terminal and a second fixture for connecting and fixing a second connection terminal. The first connection terminal and the second connection terminal are a pair of concave-convex charging connectors, wherein the first connection terminal is a concave connection terminal and the second connection terminal is a convex connection terminal. One of the first and second connection terminals installed on each test assembly group is a test sample, and the other connection terminal is a test component. The first fixture includes a fixing clip for fixing the first connection terminal and a first quick connector for electrically connecting the first connection terminal to a wire at one end of the test assembly. The second fixture includes a second quick connector for electrically connecting the second connection terminal to a wire at the other end of the test assembly. The fixing clip, the first quick connector, and the second quick connector are all connected to corresponding resistance measuring probes. Each resistance measuring probe is connected to a multi-channel ohmmeter data recorder, which is connected to a host computer for configuring test parameters.

2. The current cycle resistance test device for the conductive charging connector of an electric vehicle according to claim 1, characterized in that: A temperature sensor is also provided in the test box.

3. The current cycle resistance test device for the conductive charging connector of an electric vehicle according to claim 1, characterized in that: Resistance probe measurement positions are reserved on the fixing clip, the first quick connector, and the second quick connector.

4. The current cycle resistance test device for the conductive charging connector of an electric vehicle according to claim 1, characterized in that: It also includes a contact resistance measuring probe for testing the resistance at the connection between the first connection terminal and the second connection terminal.

5. The current cycle resistance test device for the conductive charging connector of an electric vehicle according to claim 1, characterized in that: The voltage output range of the power supply is 0-1500V, and the current output range is 0-2000A. The power supply is connected to the host computer via network communication.

6. The current cycle resistance test device for the conductive charging connector of an electric vehicle according to claim 2, characterized in that: The working power supply of the temperature sensor is 3.0~5.5V / DC, the temperature measurement range is -55℃~+125℃, and the inherent temperature measurement error is ±1℃.

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