Single-board test tool for double-battery parallel controller

Abstract

The utility model provides a single-board test tool for a double-battery parallel controller, which comprises a needle bed main body, keys, a switching power supply and a test board are arranged in the needle bed main body, a plurality of test needles are arranged in the middle of the outside of the needle bed main body, and a test result indicating lamp is arranged above the outside of the needle bed main body. A power indicator and a power button are arranged on the side of the needle bed body; the test board is provided with an MCU minimum system, a power supply processing circuit, a speed detection circuit, an ACC switching detection circuit, an MOS driving signal acquisition detection circuit, a CAN communication detection circuit, a UART communication detection circuit and a test result display circuit. The power supply processing circuit, the speed detection circuit, the ACC switching detection circuit, the MOS driving signal acquisition detection circuit, the CAN communication detection circuit, the UART communication detection circuit and the test result display circuit are all connected with the MCU minimum system. The device is easy to operate, objective in test result and high in reliability.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection equipment, in particular to a single-board testing tool for a dual-battery parallel controller. Background Art

[0002] At present, pure electric vehicles mostly use dual battery pack mode to increase driving range and facilitate charging and carrying. Dual battery parallel controller is a new product in the past two years. There is almost no single-board test tooling for dual battery parallel controller, which brings great inconvenience to mass production and debugging. Summary of the invention

[0003] In view of this, the utility model aims to overcome the shortcomings of the above problems in the prior art, and proposes a single-board test fixture for a dual-battery parallel controller, which simulates the peripheral environment of the vehicle system at a non-high-power level to detect various functions of the dual-battery parallel controller at the board level, such as: single-board power supply, drive signal, CAN communication, UART communication, AD sampling, speed pulse, IO port, etc. It is convenient for batch production and batch testing of parallel devices, and improves production efficiency and production quality.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A single-board test fixture for a dual-battery parallel controller comprises a needle bed body, wherein a button, a switch power supply, and a test board are arranged inside the needle bed body, a plurality of test needles are arranged at the middle position outside the needle bed body, a test result indicator light is arranged above the outside of the needle bed body, and a power indicator light and a power button are arranged on the side of the needle bed body; an MCU minimum system, a power processing circuit, a speed detection circuit, an ACC switching detection circuit, a MOS drive signal acquisition detection circuit, a CAN communication detection circuit, a UART communication detection circuit, and a test result display circuit are arranged on the test board, and the power processing circuit, the speed detection circuit, the ACC switching detection circuit, the MOS drive signal acquisition detection circuit, the CAN communication detection circuit, the UART communication detection circuit, and the test result display circuit are all connected to the MCU minimum system.

[0006] Furthermore, the switching power supply is a 60V switching AC / DC power supply.

[0007] Furthermore, it also includes a manual presser for fixing the dual-battery parallel device board to be tested.

[0008] Furthermore, the MCU minimum system adopts a single-chip microcomputer STM32FEBKC6T6.

[0009] Furthermore, the test result display circuit is decoded by a decoder and then powered by a triode to display the result.

[0010] Furthermore, the CAN transceiver used by the CAN communication detection circuit is TJA1042T / 3.

[0011] Furthermore, in the speed detection circuit, the SN74LVC1T45 chip is used for level conversion and shaping.

[0012] Furthermore, in the UART communication detection circuit, the sending / output data line adopts a level conversion circuit between 5V and 3.3V constructed by transistors.

[0013] Compared with the prior art, the single-board test fixture of a dual-battery parallel controller described in the utility model has the following advantages:

[0014] The utility model provides a simulation of the peripheral environment of the whole vehicle system at a non-high-power level to detect various functions of the dual-battery parallel controller at the board level, including single-board power supply, drive signal, CAN communication, UART communication, AD sampling, speed pulse, IO port and other functions; it is convenient for batch production and batch testing of parallel devices, improves production efficiency and production quality, is easy to operate, has objective test results and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0016] Figure 1 It is a structural schematic diagram of a single-board test fixture of a dual-battery parallel controller of the utility model;

[0017] Figure 2 This is a schematic diagram of the electrical principle of a single-board test fixture for a dual-battery parallel controller of the utility model;

[0018] Figure 3 It is a schematic diagram of a speed detection circuit of the utility model;

[0019] Figure 4 It is a schematic diagram of the UART communication detection circuit of the utility model;

[0020] Figure 5 This is a schematic diagram of the principle of the test board of the utility model;

[0021] Figure 6 It is a schematic diagram of the working process of the test board of the utility model.

[0022] Description of Reference Numerals

[0023] 1-Wire harness; 2-Dual battery parallel device to be tested; 3-Test light; 4-Power display light; 5-Power button; 6-Manual presser. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0028] The utility model mainly detects the stability of the welded components and the effectiveness of various components at the board level after the welding of the dual battery parallel device is completed. The test needle is used to test the stability of the welded components and the effectiveness of various components at the board level. Since the test needle is directly pressed on the soldering point of the board to be tested, the cumbersome wiring and the concern of wire falling off are eliminated, and the test board and the bed of needles are connected, which improves the test efficiency and stability. The main detection functions are as follows:

[0029] 1. Check the stability of the 12V, 5V, 3.3V, and 5VCAN isolated power supplies on the dual battery parallel device PCB.

[0030] 2. Check the welding and function of each device on the two CAN and one UART communication circuits on the dual battery parallel PCB;

[0031] 3. Check the function of the PWM speed signal receiving circuit on the dual battery parallel device PCB;

[0032] 4. Check the components and functions of the MOS drive signal circuit on the dual battery parallel device PCB;

[0033] 5. Check the power-on circuit and power-on collection circuit components and functions on the dual battery parallel device PCB.

[0034] In order to realize the above detection function, the utility model provides a single-board test tool for a dual-battery parallel controller, such as Figure 1-2 As shown, it includes a needle bed body, a button, a switch power supply, and a test board are arranged inside the needle bed body, a plurality of test needles are arranged in the middle position outside the needle bed body, a test result indicator light is arranged above the outside of the needle bed body, and a power indicator light and a power button are arranged on the side of the needle bed body; an MCU minimum system, a power processing circuit, a speed detection circuit, an ACC switching detection circuit, a MOS drive signal acquisition detection circuit, a CAN communication detection circuit, a UART communication detection circuit, and a test result display circuit are arranged on the test board, and the power processing circuit, the speed detection circuit, the ACC switching detection circuit, the MOS drive signal acquisition detection circuit, the CAN communication detection circuit, the UART communication detection circuit, and the test result display circuit are all connected to the MCU minimum system.

[0035] The principle of this equipment is to press the main switch K1 to power on the test needle bed equipment, press the ACC button, then the test light on the equipment will light up, and the test board will proceed to the detection program. The test board will first detect 12V, 5V, 3.3V, 5VCAN through point-to-point AD sampling of the test needle, detect ACC, and voltage detection of important points on the MOS drive circuit. The second step is to detect CAN and UART communication through a pre-established communication protocol. The third step is to simulate the instrument sending a PWM wave to detect whether the speed signal acquisition circuit of the dual-battery parallel board is easy to use. After the detection is completed, the test light will go out and the test results will begin to be displayed.

[0036] The principle schematic diagram of the test board of the utility model is as follows Figure 5 As shown in the figure, the MCU minimum system uses STM32FEBKC6T6 as the microcontroller, and the power supply part is mainly used to supply power to various devices on the test board.

[0037] Specifically, the power processing circuit divides and adjusts the collected voltages such as 12V and 5V through resistor voltage division to meet the MCU pin AD voltage collection range for collection and analysis.

[0038] Specifically, the test result display circuit is decoded by a decoder and then powered by a triode to display the result.

[0039] Specifically, the CAN transceiver used in the CAN communication detection circuit is TJA1042T / 3. In order to ensure the stability and reliability of the detection communication, a 5V isolated power supply is used.

[0040] Specifically, the ACC switching detection circuit and the MOS drive signal acquisition detection circuit use a resistor voltage division method for acquisition, and then perform voltage conditioning through a first-order low-pass filter.

[0041] Specifically, in order to ensure stability and control costs to the maximum extent, the UART communication detection circuit adopts a very simple structure, such as Figure 4 As shown, the transmission / output data line adopts a 5V and 3.3V level conversion circuit built with transistors, which is simple in design and highly reliable.

[0042] Specifically, the speed detection circuit is as follows: Figure 3 As shown, the MCU outputs the PWM signal to simulate the speed value, and uses the SN74LVC1T45 chip to perform level conversion and shaping to ensure the validity of the signal.

[0043] like Figure 6 The figure shows the specific working process of the test board. First, after power-on, the program enters the initialization phase, including the initialization of functional modules such as IO port, UART, timer TIM, AD, CAN, etc.; then wait for ACC to power on, that is, the simulated key door sampling signal. If the power is on, the test light is enabled and it is always on, and the 12V, 5V, 3.3V, and 5VCAN isolated power supply are sampled and tested. Then, the voltage of the ACC switching signal and the drive signal issued by the MCU and the drive signal issued by the MOS driver chip are collected and tested. At the same time, CAN and UART communication detection are performed in the TIM timer interrupt, and the UART communication detection protocol includes the speed signal and the detection results of UART communication. After the detection is completed, the corresponding test results are displayed through a 4-bit code. After the ACC is turned off, all variables are cleared and the next board is waited for detection.

[0044] The entire test operation process of the utility model is as follows:

[0045] 1. Use a manual presser 6 to fix the bare board of the dual battery parallel device 2 to be tested, so that the test pins and the test solder points on the parallel device correspond one to one.

[0046] 2. Connect the power supply, press the power button 5, the power indicator light 4 lights up, press the ACC button to simulate the key door of the vehicle;

[0047] 3. At this time, the test light 3 is always on, and the test phase begins. After waiting for a few seconds, the test light goes out and the test is completed;

[0048] 4. The test light starts to flash 3 times, showing the test results. If everything is normal, all lights will stay on. If there is a problem, the corresponding lights will go out. You can record the test results at this time.

[0049] 5. Turn off the ACC button, but do not turn off the power button 5. Replace the next board and repeat steps 1 to 5.

[0050] It can be seen from the test steps that the test is simple and the bare board can be easily tested without investing a lot of manpower.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A single-board test fixture for a dual-battery parallel controller, characterized in that: It includes a needle bed body, which is internally provided with a button, a switch power supply, and a test board, a plurality of test needles are provided in the middle position outside the needle bed body, a test result indicator light is provided above the outside of the needle bed body, and a power indicator light and a power button are provided on the side of the needle bed body; an MCU minimum system, a power processing circuit, a speed detection circuit, an ACC switching detection circuit, a MOS drive signal acquisition detection circuit, a CAN communication detection circuit, a UART communication detection circuit, and a test result display circuit are provided on the test board, and the power processing circuit, the speed detection circuit, the ACC switching detection circuit, the MOS drive signal acquisition detection circuit, the CAN communication detection circuit, the UART communication detection circuit, and the test result display circuit are all connected to the MCU minimum system.

2. The single-board test fixture for a dual-battery parallel controller according to claim 1, characterized in that: The switching power supply is a 60V switching AC / DC power supply.

3. The single-board test fixture for a dual-battery parallel controller according to claim 1, characterized in that: It also includes a manual presser for fixing the double battery parallel device board to be tested.

4. The single-board test fixture for a dual-battery parallel controller according to claim 1, characterized in that: The MCU minimum system adopts the single-chip microcomputer STM32FEBKC6T6.

5. The single-board test fixture for a dual-battery parallel controller according to claim 1, characterized in that: The test result display circuit is decoded by a decoder and then driven by a triode to display the result.

6. The single-board test fixture for a dual-battery parallel controller according to claim 1, characterized in that: The CAN transceiver used in the CAN communication detection circuit is TJA1042T / 3.

7. The single-board test fixture for a dual-battery parallel controller according to claim 1, characterized in that: In the speed detection circuit, the SN74LVC1T45 chip is used for level conversion and shaping.

8. The single-board test fixture for a dual-battery parallel controller according to claim 1, characterized in that: In the UART communication detection circuit, the transmission / output data line adopts a level conversion circuit between 5V and 3.3V built by transistors.

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