Load debugging system for double-battery parallel connection device

Abstract

The utility model provides a load debugging system for a double-battery shunt, which comprises a system shell, and a system manager, two current transmitters, two relays, a circuit breaker, a load resistor, a lead-acid battery pack and a switching power supply which are arranged in the shell, the test board is provided with an LED display circuit, an MCU minimum control system, a CAN communication circuit, a relay control circuit, a 12V output circuit, a current acquisition circuit, a voltage acquisition circuit and a power supply processing circuit, and the power supply processing circuit is connected with the 12V output circuit; the two current transmitters, the two relays, the lead-acid battery pack and the switching power supply are all connected with the test board, the circuit breaker is connected with the power switch, and the load resistor is connected with the test board through the relays. According to the utility model, various functions of the double-battery parallel controller are detected by simulating a whole vehicle system, batch production and batch detection of the parallel controller are facilitated, and the production efficiency and the production quality are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection equipment, in particular to a double-battery parallel device load debugging system. 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 are very few products on the market, and there is almost no debugging tooling for dual battery parallel controller, which brings extreme inconvenience to mass production debugging. Summary of the invention

[0003] In view of this, the utility model aims to overcome the shortcomings of the above-mentioned problems in the prior art and proposes a dual-battery parallel device load debugging system, which simulates the entire vehicle system to detect various functions of the dual-battery parallel controller.

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

[0005] A dual-battery parallel load debugging system comprises a system shell, and a system manager, two current transmitters, two relays, a circuit breaker, a load resistor, a lead-acid battery pack, and a switching power supply arranged in the shell. The system manager comprises a test board, and the test board is provided with an LED display circuit, an MCU minimum control system, a CAN communication circuit, a relay control circuit, a 12V output circuit, a current acquisition circuit, a voltage acquisition circuit, and a power processing circuit. The LED display circuit, the CAN communication circuit, the relay control circuit, the 12V output circuit, the current acquisition circuit, and the voltage acquisition circuit are all connected to the MCU minimum control system, and the power processing circuit is connected to the 12V output circuit; the two current transmitters, the two relays, the lead-acid battery pack, and the switching power supply are all connected to the test board, the circuit breaker is connected to the power switch, and the load resistor is connected to the test board through a relay.

[0006] Furthermore, the MCU of the MCU minimum control system adopts STM32F105.

[0007] Furthermore, the load resistor is a simulated load, and the load capacity of the parallel connector is tested by cutting in the load resistor. The load current is fed back to the test board through the current sensor, and the test board determines whether the current size is correct.

[0008] Furthermore, the current transmitter is used to test the load current.

[0009] Furthermore, the LED display circuit performs power / voltage amplification through the MMBT5551 transistor and outputs the control indicator light color from the MCU to display the status.

[0010] Furthermore, the power processing circuit input voltage is a 60V DC switching power supply, and uses an MP9486A chip to convert 60V to 12V, an LM317DCYI chip to convert 12V to 5V, and a TLV73333PDBVT chip to convert 5V to 3.3V to power the MCU.

[0011] Furthermore, a resistance fan is provided in the housing, and the resistance fan is connected to a switching power supply.

[0012] Furthermore, the outer part of the shell is also provided with a power indicator light, a test result indicator light, a meter, and a test knob switch.

[0013] Compared with the prior art, the dual-battery parallel load debugging system described in the utility model has the following advantages:

[0014] The utility model simulates the whole vehicle system to detect various functions of the dual-battery parallel controller, which is convenient for batch production and batch detection of parallel devices, improves production efficiency and production quality, and improves the qualified rate of factory parallel devices. 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 This is a schematic diagram of the principle of a dual-battery parallel load debugging system described in the utility model;

[0017] Figure 2 This is a schematic diagram of the system manager principle of the utility model;

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

[0019] Figure 4 It is a test flow diagram of the test board of the utility model;

[0020] Figure 5 This is a plan view of the debugging system shell of the utility model.

[0021] Description of Reference Numerals

[0022] 1- Power indicator light; 2- Instrument; 3- Test result indicator light; 4- Test knob switch. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0027] like Figure 1-2 As shown, the utility model provides a dual-battery parallel load debugging system, including a system housing, and a system manager, 2 current transmitters, 2 relays, a circuit breaker, a load resistor, a lead-acid battery pack, and a switching power supply arranged in the housing, the system manager including a test board, the test board is provided with an LED display circuit, an MCU minimum control system, a CAN communication circuit, a relay control circuit, a 12V output circuit, a current acquisition circuit, a voltage acquisition circuit, and a power processing circuit, the LED display circuit, the CAN communication circuit, the relay control circuit, the 12V output circuit, the current acquisition circuit, and the voltage acquisition circuit are all connected to the MCU minimum control system, and the power processing circuit is connected to the 12V output circuit; the 2 current transmitters, the 2 relays, the lead-acid battery pack, and the switching power supply are all connected to the test board, the circuit breaker is connected to the power switch, and the load resistor is connected to the test board through a relay. Figure 1 The target board in the figure is the dual parallel controller to be tested.

[0028] Specifically, a resistance fan is also provided in the housing, and the resistance fan is connected to a switching power supply.

[0029] Specifically, the outer portion of the housing is also provided with a power indicator light, a test result indicator light 3, a meter 2, and a power switch knob 4.

[0030] Specifically, the test version is the brain of the debugging tooling. The MCU integrated on it is STM32F105, which is the core component that controls the entire tooling and simulates the communication environment of the whole vehicle. The CAN communication circuit is NXP's TJA1042T / 3. There are two CAN channels in total. One CAN simulates the BMS communication in battery pack 1 with a communication rate of 500K, and the other simulates battery pack 2. The test sequence is determined by the instantaneous battery voltage and SOC in the simulated communication message.

[0031] Specifically, the load resistor is a simulated load. By cutting in the load resistor, the load capacity of the parallel connector can be tested, up to 12A. The load current is fed back to the test board through the current sensor, and the test board determines whether the current size is correct.

[0032] Specifically, the switching power supply is a 60VDC power supply, which supplies power to the entire device and simulates a battery pack to provide power voltage to the load.

[0033] Specifically, the lead-acid battery pack is a 12V 6-cell group connected in series to provide a boost voltage for the target board MOS drive circuit.

[0034] Specifically, the current transmitter is used to test the load current as a basis for test judgment.

[0035] Specifically, the LED display circuit performs power / voltage amplification through the MMBT5551 transistor and outputs the control detection result indicator light 3 from the MCU to display the status.

[0036] Specifically, the input voltage of the power processing circuit is a 60V DC switching power supply. The MP9486A chip is used for 60V to 12V voltage conversion, the LM317DCYI chip of TI is used for 12V to 5V conversion, and the TLV73333PDBVT chip of TI is used for 5V to 3.3V to power the MCU. The power processing circuit is mainly used to power the components on the test board. It should be emphasized that the instrument power supply 12V circuit also outputs 12V power from the power processing circuit through the MCU control. The specific processing circuit is as follows Figure 3 As shown, the microcontroller controls the transistor Q13 through the pin ACC_INST. When the transistor output effectively controls Q14 to turn on, a 12V power supply is output for the instrument. This method ensures that the instrument and the test board are powered on at the same time, communicate without time difference, and completely restore the vehicle operation environment.

[0037] Specifically, the instrument is powered by 12V and detects the communication and transmission speed PWM signal functions.

[0038] The whole structure principle is as follows. After S1 is powered on, the test board outputs 12V to provide power supply voltage to the instrument. The target board is powered on, communicates normally with the test board, and waits for the next test. Press the test button K2, the load resistor is connected, and the test board simulates the battery pack CAN communication and exchanges information with the target board. First, test battery pack 1 to run a 10A load alone, then test battery pack 2 to run a 10A load alone, and finally test battery packs 1 and 2 to run a 5A load in parallel. If the target board is damaged at this time, the problem of the board can be determined by the load current.

[0039] like Figure 4 The figure shows the test process of the test board, which determines the conditions for detecting battery 1, battery 2 and parallel connection through the voltage and SOC in the CAN communication protocol.

[0040] like Figure 5 The figure shows the plan view of the debugging system housing. Among the test result indicator lights 3, a is the parallel test result indicator light, b is the test completion indicator light, c is the battery 2 channel test result display indicator light, and d is the battery 1 channel test result indicator light. The entire test operation process is as follows:

[0041] 1. After connecting the power supply, turn the main power switch 1, and the power indicator light turns green;

[0042] 2. At this time, connect the paralleler, resistor, and battery compartment, and connect the cooling fan plug on the resistor box to the 220V AC. After the connection is completed, you can hear the sound of the fan turning;

[0043] 3. Turn the test knob switch 4, the LCD screen of instrument 2 lights up, and the parallel board is powered on for testing. Battery 1 path is tested for 4s, and battery 2 path is tested for 4s. At this time, the current clamp can be used to observe the current on the battery 1 and battery 2 lines;

[0044] 4. Wait for a while for the test to complete. The test completion indicator lights up green. If the battery 2 and battery 1 channels are normal, the green lights will light up. If there is a problem, the red light will light up.

[0045] 5. After the test, turn off the test rotary switch 4 in time to avoid the battery consuming too fast. At this time, there is no voltage at both ends of the parallel connector. Then replace the parallel connector and repeat 3. (No need to turn off the main power switch)

[0046] The above are the entire test steps, which can be repeated.

[0047] 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 dual battery parallel load debugging system, Features: The invention comprises a system shell, and a system manager, two current transducers, two relays, a circuit breaker, a load resistor, a lead-acid battery pack, and a switching power supply arranged in the shell. The system manager comprises a test board, and the test board is provided with an LED display circuit, an MCU minimum control system, a CAN communication circuit, a relay control circuit, a 12V output circuit, a current acquisition circuit, a voltage acquisition circuit, and a power processing circuit. The LED display circuit, the CAN communication circuit, the relay control circuit, the 12V output circuit, the current acquisition circuit, and the voltage acquisition circuit are all connected to the MCU minimum control system, and the power processing circuit is connected to the 12V output circuit; the two current transducers, the two relays, the lead-acid battery pack, and the switching power supply are all connected to the test board, the circuit breaker is connected to the power switch, and the load resistor is connected to the test board through a relay.

2. A dual battery parallel load debugging system according to claim 1, Features: The MCU of the MCU minimum control system adopts STM32F105.

3. A dual battery parallel load debugging system according to claim 1, Features: The load resistor is a simulated load, and the load capacity of the parallel connector is tested by cutting in the load resistor. The load current is fed back to the test board through the current sensor, and the test board determines whether the current size is correct.

4. A dual battery parallel load debugging system according to claim 1, Features: The current transmitter is used to test the load current.

5. A dual battery parallel load debugging system according to claim 1, Features: The LED display circuit performs power / voltage amplification through the MMBT5551 transistor and outputs the control indicator light color from the MCU to display the status.

6. A dual battery parallel load debugging system according to claim 1, Features: The power processing circuit input voltage is a 60V DC switching power supply. The MP9486A chip is used for 60V to 12V voltage conversion, the LM317DCYI chip is used for 12V to 5V conversion, and the TLV73333PDBVT chip is used for 5V to 3.3V to power the MCU.

7. A dual battery parallel load debugging system according to claim 1, Features: A resistance fan is also arranged in the shell, and the resistance fan is connected to a switching power supply.

8. A dual battery parallel load debugging system according to claim 1, Features: The outer part of the shell is also provided with a power indicator light, a test result indicator light, a meter, and a test knob switch.

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