A pre-charge circuit box function test tool

Abstract

The utility model relates to a kind of pre-charging circuit box function test tool in the automobile control module detection technical field, belong to a kind of pre-charging circuit box function test tool, including tool main body box, tool main body box is equipped with tool panel, the tool panel is integrated with several test sockets for connecting pre-charging circuit box, the tool main body box is integrated with several detection display modules, the detection display module is connected with test socket, the test socket is connected with module power supply, between low voltage input socket and 24V module power supply negative pole, switch 1 and switch 2 are equipped, switch 1 and switch 2 are connected to different contact respectively, the test socket further includes PTC socket, compressor socket and DCDC wire clamp.The utility model can be connected to different test loop, carry out different function test, quickly and effectively realize the multiple key function test of pre-charging circuit, provide convenient and reliable verification for production and product quality, and then can reduce the demand for manpower, improve detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive control module testing technology, and belongs to a pre-charging circuit box functional testing fixture. Background Technology

[0002] The pre-charging circuit limits the charging current by connecting a pre-charging resistor in series, ensuring that the high-voltage electricity charges the bus capacitor through the pre-charging circuit. When the difference between the bus capacitor voltage and the power battery voltage reaches a set value, the battery management system (BMS) determines that the pre-charging is complete and further controls the positive contactor to close while simultaneously opening the pre-charging contactor, thus completing the high-voltage power supply to the vehicle.

[0003] During normal use, it is necessary to determine whether the positive and negative inputs and outputs of the high-voltage line of the pre-charge circuit box are correct, whether the pre-charge resistor meets the design requirements, whether the pre-charge main relay is working properly, and whether the pre-charge low-voltage control is satisfactory. Currently, products are tested manually after production, but this requires a variety of testing tools, is cumbersome, and demands significant manpower and resources, wasting both time and manpower, and cannot meet current production needs. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a pre-charging circuit box functional testing fixture.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This application provides a pre-charging circuit box functional testing fixture, including a fixture main body box, a fixture panel inside the fixture main body box, a plurality of test sockets for connecting the pre-charging circuit box integrated on the fixture panel, a plurality of detection and display modules integrated on the fixture main body box, the detection and display modules being connected to the test sockets, and the test sockets being connected to the module power supply.

[0006] Preferably, each of the test sockets has multiple interfaces at the front end and multiple contacts at the rear end, with each contact corresponding to and connected to one of the interfaces.

[0007] Preferably, the test socket includes a low-voltage input socket and a high-voltage input socket, and the module power supply includes a 24V module power supply and a 12V module power supply. The positive and negative terminals of the 24V module power supply are connected to the low-voltage input socket through contacts, and the positive and negative terminals of the 12V module power supply are connected to the high-voltage input socket through contacts.

[0008] Preferably, a switch 1 and a switch 2 are provided between the low-voltage input socket and the negative terminal of the 24V module power supply, and the switch 1 and switch 2 are respectively connected to different contacts.

[0009] Preferably, the test socket further includes a PTC socket, a compressor socket, and a DC-DC clamp. The detection display module includes a digital voltmeter and a digital ohmmeter. The digital voltmeter is connected between the low-voltage input socket and the 24V module power supply. One end of the digital ohmmeter is connected to the positive terminal of the 12V module power supply, and the other end is connected to the corresponding positive contacts of the PTC socket, the compressor socket, and the DC-DC clamp.

[0010] Preferably, the detection display module further includes indicator lights 1, 2, and 3. One end of indicator light 1 is connected to the positive contact of the PTC socket, and the other end is connected to the negative contact of the PTC socket. One end of indicator light 2 is connected to the positive contact of the compressor socket, and the other end is connected to the negative contact of the compressor socket. One end of indicator light 3 is connected to the positive contact of the DC-DC clamp, and the other end is connected to the negative contact of the DC-DC clamp.

[0011] Preferably, a diode 1 and a switch 3 are connected between the positive and negative terminals of the indicator light 1 and the PTC socket, respectively; a diode 2 and a switch 4 are connected between the positive and negative terminals of the indicator light 2 and the compressor socket, respectively; and a diode 3 and a switch 5 are connected between the positive and negative terminals of the DC-DC clamp of the indicator light 3, respectively.

[0012] Compared with the prior art, this utility model provides a pre-charging circuit box functional testing fixture, which has the following beneficial effects: This invention can connect different test circuits to perform different functional tests, quickly and effectively realize multiple key functional tests of the pre-charge circuit, provide convenient and reliable verification for production and product quality, thereby reducing the need for manpower, saving testing time, and improving testing efficiency.

[0013] The features and advantages of this utility model will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a circuit connection diagram of the present invention; Detailed Implementation To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts of this utility model.

[0015] See Figure 1This application provides a pre-charging circuit box functional testing fixture, including a fixture main body box, a fixture panel inside the fixture main body box, a plurality of test sockets for connecting the pre-charging circuit box integrated on the fixture panel, a plurality of detection display modules integrated on the fixture main body box, the detection display modules being connected to the test sockets, and the test sockets being connected to the module power supply.

[0016] Preferably, each of the test sockets has multiple interfaces at the front end and multiple contacts at the rear end, with each contact corresponding to and connected to one of the interfaces.

[0017] Preferably, the test socket includes a low-voltage input socket and a high-voltage input socket, and the module power supply includes a 24V module power supply and a 12V module power supply. The positive and negative terminals of the 24V module power supply are connected to the low-voltage input socket through contacts, and the positive and negative terminals of the 12V module power supply are connected to the high-voltage input socket through contacts.

[0018] Preferably, a switch 1 and a switch 2 are provided between the low-voltage input socket and the negative terminal of the 24V module power supply, and the switch 1 and switch 2 are respectively connected to different contacts.

[0019] Preferably, the test socket further includes a PTC socket, a compressor socket, and a DC-DC clamp. The detection display module includes a digital voltmeter and a digital ohmmeter. The digital voltmeter is connected between the low-voltage input socket and the 24V module power supply. One end of the digital ohmmeter is connected to the positive terminal of the 12V module power supply, and the other end is connected to the corresponding positive contacts of the PTC socket, the compressor socket, and the DC-DC clamp.

[0020] Preferably, the detection display module further includes indicator lights 1, 2, and 3. One end of indicator light 1 is connected to the positive contact of the PTC socket, and the other end is connected to the negative contact of the PTC socket. One end of indicator light 2 is connected to the positive contact of the compressor socket, and the other end is connected to the negative contact of the compressor socket. One end of indicator light 3 is connected to the positive contact of the DC-DC clamp, and the other end is connected to the negative contact of the DC-DC clamp.

[0021] The main testing contents that can be achieved by this utility model are: 1. High voltage positive and negative terminals (correct input and output sides) Principle: The positive and negative terminals of the input and output on the pre-charge high-voltage side are corresponding, that is, the high-voltage input is positive and the high-voltage output is also positive, and the negative terminal is the same. Operation: Turn on switches 1, 3, 4, and 5. At this time, all electronic components in the circuit are connected, and indicator lights 1, 2, and 3 will light up, indicating that the high voltage input and output are correct. (The fixture has three diodes connected in the circuit on the three high voltage output sides. The specific model can be LL4148. If the positive and negative terminals on the output side are reversed, the indicator lights in the circuit will not light up, indicating that the product is unqualified.) 2. Pre-charge resistance 10KΩ rapid measurement The input and output resistance values ​​of the main relay need to meet the design requirement of 10KΩ. Operation: Turn on switch 2, connect a digital ohmmeter between the relay input and output. If the display shows a resistance value of 10KΩ, it means that the requirements are met.

[0022] 3. The main relay is working normally. Principle: The main relay will make a sound when it is closed, which indicates that the relay is functioning normally.

[0023] Operation: Turn on switch 1. At this time, the circuit is in the following order: the main relay starts to close and makes a closing sound, then the main relay is working normally.

[0024] 4. Feedback voltage 12V Principle: Feedback signal circuit acquisition design: The voltage feedback method is adopted. When the relay is not engaged, the feedback signal is about 12V. When the relay is engaged, the feedback signal is 0V (conducted to ground).

[0025] Method: When switch 1 is closed, the main relay is not engaged, and the feedback voltmeter displays 12V. When switch 1 is opened, the feedback voltmeter displays 0V, indicating that the feedback voltage is working normally.

[0026] The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pre-charge circuit box functional testing fixture, characterized in that: The device includes a main fixture box, which contains a fixture panel. The fixture panel integrates several test sockets for connecting to a pre-charging circuit box. The main fixture box also integrates several detection and display modules. The detection and display modules are connected to the test sockets, and the test sockets are connected to the module power supply. Each test socket has multiple interfaces at its front end and multiple contacts at its rear end, with each contact corresponding to and connected to one of the interfaces. The test socket includes a low-voltage input socket and a high-voltage input socket; The modular power supply includes a 24V modular power supply and a 12V modular power supply. The positive and negative terminals of the 24V modular power supply are connected to a low-voltage input socket via contacts, and the positive and negative terminals of the 12V modular power supply are connected to a high-voltage input socket via contacts. Switch 1 and switch 2 are provided between the low-voltage input socket and the negative terminal of the 24V modular power supply, and switches 1 and 2 are respectively connected to different contacts. The test socket also includes a PTC socket, a compressor socket, and a DC-DC cable clamp; The detection and display module includes a digital voltmeter and a digital ohmmeter. The digital voltmeter is connected between the low-voltage input socket and the 24V module power supply. One end of the digital ohmmeter is connected to the positive terminal of the 12V module power supply, and the other end is connected to the positive terminals of the PTC socket, the compressor socket, and the DC-DC clamp. The detection and display module further includes indicator lights 1, 2, and 3. One end of indicator light 1 is connected to the positive contact of the PTC socket, and the other end is connected to the negative contact of the PTC socket. One end of indicator light 2 is connected to the positive contact of the compressor socket, and the other end is connected to the negative contact of the compressor socket. One end of indicator light 3 is connected to the positive contact of the DC-DC clamp, and the other end is connected to the negative contact of the DC-DC clamp. A diode 1 and a switch 3 are connected between indicator light 1 and the positive and negative terminals of the PTC socket, respectively. A diode 2 and a switch 4 are connected between indicator light 2 and the positive and negative terminals of the compressor socket, respectively. A diode 3 and a switch 5 are connected between indicator light 3 and the positive and negative terminals of the DC-DC clamp, respectively.

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