An automated BMS battery testing system

Abstract

This utility model discloses an automated BMS battery testing system, comprising: a main control chip: two sets of main control chips, including main control chip U1 and main control chip U2 communicating via UART; main control chip U1 controls the current of an electronic load detection ammeter, and main control chip U2 is used for data communication, data display, and test buttons; and a load simulation module: the electronic load simulation module is used to form a current source with adjustable direction and current. This utility model can simulate various states of a battery in actual use and can adjust relevant parameters such as temperature, current, single cell voltage, total voltage, and insulation resistance during actual battery use. By comparing standard values ​​with parameters obtained from the battery management system, the measurement errors of temperature, current, single cell voltage, total voltage, and insulation resistance of the BMS, as well as the maximum, minimum, and average values ​​of the errors, can be calculated to obtain the accuracy of each parameter.

Description

Technical Field

[0001] This utility model relates to the field of battery testing module technology, specifically an automated BMS battery testing system. Background Technology

[0002] The Battery Management System (BMS) is one of the most important components of a lithium battery pack. The BMS not only monitors battery parameters such as voltage, current, and temperature in real time, but also performs functions such as leakage detection, thermal management, battery balancing management, alarm reminders, SOC calculation, and SOH status reporting during battery charging and discharging. This ensures that the battery is always in a safe and controllable charging and discharging process, greatly improving the battery's cycle life in actual use.

[0003] With the continuous advancement of battery technology, existing battery management systems (BMS) face challenges during testing. Batteries operate under varying conditions, resulting in differences in temperature, current, individual cell voltage, total voltage, and insulation resistance, all of which affect test results. Therefore, it is necessary to compare these parameters with those of the battery management system. To address this, we propose an automated BMS battery testing system. Utility Model Content

[0004] The purpose of this invention is to provide an automated BMS battery testing system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automated BMS battery testing system, comprising:

[0006] Main control chip: The main control chip is configured in two groups, including main control chip U1 and main control chip U2. The main control chip U1 and main control chip U2 communicate through UART. The main control chip U1 controls the current of the electronic load detection ammeter, and the main control chip U2 is used for data communication, data display and test buttons.

[0007] Barcode scanner: The barcode scanner is used to scan the BMS serial number;

[0008] Load simulation module: The electronic load simulation module is used to form a current source with adjustable direction and current;

[0009] Hardware module: The hardware module includes indicator lights, a buzzer, and an LCD display screen;

[0010] Communication module: The communication module is used for BMS data exchange, and the communication module includes a Bluetooth communicator;

[0011] Relay: The relay is used for the isolation and processing of input and output signals.

[0012] Furthermore, the load simulation module includes a resistor R2, a transistor Q1, an optocoupler PC1, and a switching diode D1. The base of the transistor Q1 is connected to the resistor R2, the collector of the transistor Q1 is connected to the resistor R3, a resistor R4 is provided between pins 1 and 2 of the optocoupler PC1, pin 3 of the optocoupler PC1 is connected to the switching diode D1, and pin 4 of the optocoupler PC1 is connected to the resistor R5.

[0013] The base of transistor Q2 is connected to resistor R6, and the collector of transistor Q2 is connected to switching diode D1 and buzzer U1.

[0014] Furthermore, the load simulation module also includes a socket J3, a main control chip U3, a button KEY1, a pin socket J2, a resistor R1, and a transistor Q3. Pin 3 of the socket J3 is connected to a resistor R9 and a pull-up resistor R11 and communicates adjacent to the main control chip U3. Pin 4 of the socket J3 is connected to a resistor R10 and a pull-up resistor R12 and communicates adjacent to the main control chip U3. The button KEY1 is connected to the pin socket J2.

[0015] One end of the resistor R1 is connected to pin 22 of the main control chip U2, the other end of the resistor R1 is connected to the base of the transistor Q5, the emitter of the transistor Q3 is grounded, and the collector of the transistor Q3 is connected to the light-emitting diode LED1.

[0016] Furthermore, pins 4 and 5 of the main control chip U1 are connected to an external ammeter, pins 27 and 28 of the main control chip U1 are connected to pins 27 and 28 of the main control chip U2 through resistors R11 and R12, and pins 29 and 30 of the main control chip U2 are connected to pins 29 and 30 of the main control chip U2 for connecting an electronic load.

[0017] Furthermore, pin 1 of the main control chip U2 is connected to an external button testing module, pin 2 of the main control chip U2 is connected to the reset pin of the Bluetooth communicator, pin 3 of the main control chip U2 is connected to the load simulation module, and pins 29 and 30 of the main control chip U2 are connected to pins 2 and 3 of the pin socket J8.

[0018] It also includes isolator U4, pin 1 of which is connected to filter capacitor C8, pins 2 and 3 of which are connected to resistors R17 and R18 respectively and are connected to pins 14 and 15 of main control chip U1 for 4G connection, and pins 6 and 7 of isolator U4 are connected to pins 3 and 4 of pin socket J5 through resistors R19 and R20.

[0019] Furthermore, it also includes isolation power supplies U5, U6, U7, U8, and U9. Pin 1 of isolation power supply U5 is connected to filter capacitor C10. Pins 2 and 3 of isolation power supply U5 are connected to resistors R21 and R22 respectively, and are also connected to pins 4 and 5 of the main control chip U1 for connection to the ammeter. Pins 6 and 7 of isolation power supply U5 are connected to pins 3 and 4 of ammeter terminal CON1 through resistors R23 and R24. Pin 2 of isolation power supply U6 is connected to capacitors C14 and C15. Pin 3 of isolation power supply U6 is connected to resistor R26. Pins 4 and 6 of isolation power supply U6 are connected to pins 1 and 3 of isolation transformer T1 to provide input voltage. Schottky diodes D5 and D6 are provided at the output position of isolation transformer T1.

[0020] Pin 1 of the isolation power supply U7 is connected to the filter capacitor C16. Pins 2 and 3 of the isolation power supply U7 are connected to pins 29 and 30 of the main control chip U1 through resistors R27 and R28, respectively. Pins 6 and 7 of the isolation power supply U7 are connected to pins 2 and 3 of the pin socket J6 through resistors R29 and R30.

[0021] Pin 2 of the isolation power supply U8 is connected to capacitors C20 and C21, and pin 3 of the isolation power supply U8 is connected to resistor R32.

[0022] Pin 1 of the isolation power supply U9 is connected to the filter capacitor C22. Pins 2 and 3 of the isolation power supply U9 are connected to pins 8 and 7 of the switch SWITCH. Pins 6 and 7 of the isolation power supply U9 are connected to pins 3 and 4 of the barcode scanner terminal CON2 through resistors R35 and R36.

[0023] Furthermore, it also includes relays REL1 and REL3, resistors R37 and R39. Pin 1 of relay REL1 is connected to pin 2 of relay REL1 via switching diode D9 and connected to a 5V power supply. One end of resistor R37 is connected to pin 25 of the main control chip U2, and the other end of resistor R37 is connected to the base of transistor Q3. The collector of transistor Q3 is connected to switching diode D9. Pins 3 and 4 of relay REL1 are connected to pins 1 and 2 of pin socket J7. Pin 2 of relay REL3 is connected to pin 3 of relay REL1 via switching diode D10 and connected to a 5V power supply. One end of resistor R39 is connected to pin 17 of the main control chip U2, and the other end of resistor R39 is connected to the base of transistor Q4. The collector of transistor Q4 is connected to switching diode D10.

[0024] Furthermore, it also includes chips U10, U11, U14, and U16. The 3rd input pin of chip U10 is connected to capacitors C26 and C27. Chip U10 is also connected to capacitors C24 and C25. Chip U10 is connected to a light-emitting diode DQ2. The 2nd pin of chip U11 is connected to capacitors C14 and C15. The 3rd pin of chip U11 is connected to resistor R43. The 4th and 6th pins of chip U11 are connected to the 1st and 3rd pins of isolation transformer T1, respectively.

[0025] The 1st pin of chip U14 is connected to capacitor C44. The 2nd and 3rd pins of chip U14 are connected to the 8th and 9th pins of main control chip U2 through resistors R57 and R58. The 6th and 7th pins of chip U14 are connected to the 1st and 4th pins of chip U15, respectively. The 6th and 7th pins of chip U15 are connected to resistors R63, R64 and R65 and are also connected to the 8th and 9th pins of BMS communication interface CON3.

[0026] Pins 1 and 3 of chip U16 are connected to capacitors C51 and C52. Pin 2 of chip U16 is grounded through filter capacitor C50. Pins 4 and 5 of chip U16 are connected through capacitor C53. Pins 11 and 12 of chip U16 are connected to pins 5 and 6 of BMS communication interface CON3 through resistors R66 and R67. Pins 13 and 14 of chip U16 are connected to pins 3 and 4 of BMS communication interface CON3 through resistors R68 and R69.

[0027] Furthermore, it also includes chips U17 and U19. Pins 1 and 2 of chip U17 are connected through capacitor C57. Pins 3, 4, and 5 of chip U17 are connected to resistors R70, R71, and R72 and are also connected to pins 6, 5, and 4 of the main control chip U2. Pins 12, 13, and 14 of chip U17 are connected to pins 2, 4, and 1 of chip U18 through resistors R73, R74, and R75. Pins 6 and 7 of chip U18 are connected to pins 1 and 2 of the BMS communication interface CON3 through resistors R76, R77, and R78.

[0028] Pin 12 of chip U19 is connected to pin 2 of main control chip U2 through switching diode D13. Pins 17 and 18 of chip U19 are connected to pins 14 and 15 of main control chip U2 through resistors R52 and R53. Pin 23 of chip U19 is connected to switching diode D14 through resistors R50 and R51.

[0029] Furthermore, it also includes a pin socket J9, with pin 1 of the pin socket J9 connected to a 3.3V voltage, and pins 2 and 3 of the pin socket J9 connected to pins 6 and 5 of the switch via resistors R7 and R15. Resistors R7 and R15 are connected to Zener diodes D15 and D16.

[0030] Compared with the prior art, the present invention has the following beneficial effects: The present invention can simulate various states of the battery in actual use, and can adjust relevant parameters such as temperature, current, single cell voltage, total voltage, and insulation resistance in the actual use of the battery. By comparing the standard values ​​with the parameters obtained by the battery management system, the measurement errors of temperature, current, single cell voltage, total voltage, and insulation resistance of the BMS, as well as the maximum, minimum, and average values ​​of the errors, can be calculated to obtain the accuracy of each parameter.

[0031] The main control chip U1 and main control chip U2 communicate with each other via UART. Main control chip U1 is primarily responsible for controlling the current of the electronic load detection ammeter and communicating with an external server via a 4G module. Main control chip U2 mainly includes a Bluetooth communicator, display screen, test buttons, buzzer, indicator lights, barcode scanner, RS485 / CAN / UART / RS232 interfaces for communication with the BMS, and a load simulation module. Main control chip U2 connects to the slave Bluetooth module of the BMS via the Bluetooth communicator to test the Bluetooth function of the BMS under test. The display screen shows the current test progress and displays the corresponding error code if an error occurs. The buzzer will provide different sound prompts for completion or test failure, and the indicator light will flash in different states to indicate whether the current test was successful or not. After the barcode scanner scans the BMS serial number, the serial number is written to the BMS under test through the main control chip U2. After writing, the serial number is read back and compared with the written serial number. Since different BMSs under test have different communication methods, the main communication methods are RS485 / CAN / UART / RS232. The lithium battery intelligent testing system includes all of the above communication methods, and the corresponding communication can be freely selected according to the communication method of the BMS under test. The load simulation is responsible for generating load signals to provide load detection for the BMS under test. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the system principle of this utility model;

[0033] Figure 2 This is a schematic diagram of the optocoupler PC1 circuit structure of this utility model;

[0034] Figure 3 This is a schematic diagram of the J3 circuit structure of the socket of this utility model;

[0035] Figure 4 This is a schematic diagram of the circuit structure of the key KEY1 of this utility model;

[0036] Figure 5 This is a schematic diagram of the circuit structure of the main control chip U3 of this utility model;

[0037] Figure 6 This is a schematic diagram of the J9 circuit structure of the pin holder of this utility model;

[0038] Figure 7 This is a schematic diagram of the circuit structure of the light-emitting diode LED1 of this utility model;

[0039] Figure 8 This is a schematic diagram of the circuit structure of the isolator U4 of this utility model;

[0040] Figure 9 This is a schematic diagram of the circuit structure of the isolation power supply U5 and isolation power supply U7 of this utility model;

[0041] Figure 10 This is a schematic diagram of the isolation power supply U9 circuit structure of this utility model;

[0042] Figure 11 This is a schematic diagram of the circuit structure of chips U17, U18 and U19 of this utility model;

[0043] Figure 12 This is a schematic diagram of the circuit structure of chip U10 of this utility model;

[0044] Figure 13 This is a schematic diagram of the circuit structure of the main control chip U1 of this utility model;

[0045] Figure 14 This is a schematic diagram of the circuit structure of the main control chip U2 of this utility model;

[0046] Figure 15 This is a schematic diagram of the circuit structure of chip U14 and chip U15 of this utility model;

[0047] Figure 16 This is a schematic diagram of the circuit structure of the chip U16 of this utility model. Detailed Implementation

[0048] 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.

[0049] Please see Figures 1-16 This utility model provides a technical solution: an automated BMS battery testing system, comprising:

[0050] Main control chip: The main control chip is configured in two groups, including main control chip U1 and main control chip U2. The main control chip U1 and main control chip U2 communicate through UART. The main control chip U1 controls the current of the electronic load detection ammeter, and the main control chip U2 is used for data communication, data display and test buttons, realizing multiple communication methods and human-computer interaction.

[0051] The barcode scanner is used to scan the BMS serial number and write the serial number into the BMS under test, ensuring the uniqueness of the code of each BMS board;

[0052] Load simulation module: The electronic load simulation module is used to form a current source with adjustable direction and current to simulate battery charging and discharging, and to test the performance of BMS under different working conditions;

[0053] Hardware module: The hardware module includes indicator lights, a buzzer, and an LCD display screen;

[0054] Communication module: The communication module is used for BMS data exchange, and the communication module includes a Bluetooth communicator;

[0055] Relay: The relay is used for the isolation and processing of input and output signals, enhancing the electrical adaptability and safety of the system.

[0056] Please see Figures 1-16 The load simulation module includes a resistor R2, a transistor Q1, an optocoupler PC1, a switching diode D1, and a transistor Q2. The resistor R2 is connected to the base of the transistor Q1, and the collector of the transistor Q1 is connected to a resistor R3. A resistor R4 is provided between pin 1 and pin 2 of the optocoupler PC1. Pin 3 of the optocoupler PC1 is connected to the switching diode D1, and pin 4 of the optocoupler PC1 is connected to a resistor R5.

[0057] In this circuit, pin 4 of optocoupler PC1 is connected to resistor R5 to control PA1 of main control chip U1, which causes transistor Q1 to function. At this time, optocoupler PC1 is turned on, and P- generates a signal that is connected to resistor B+. At this time, the load analog signal is generated, and BMS detects the load connection.

[0058] The base of transistor Q2 is connected to resistor R6, and the collector of transistor Q2 is connected to switching diode D1 and buzzer U1. When PC6 is controlled to turn on Q2, the negative terminal of the buzzer is grounded, and the buzzer starts to work.

[0059] Please see Figures 1-16 The load simulation module also includes a socket J3, a main control chip U3, a button KEY1, a pin socket J2, a resistor R1, and a transistor Q3. Pin 3 of the socket J3 is connected to a resistor R9 and a pull-up resistor R11 and communicates with the main control chip U3. Pin 4 of the socket J3 is connected to a resistor R10 and a pull-up resistor R12 and communicates with the main control chip U3.

[0060] The socket J3 uses capacitor C1 to filter and obtain a clean power supply voltage. The test process and results are displayed on the screen. If the test fails, the corresponding error code is displayed, facilitating quick problem identification by testers. The button KEY1 is connected to the pin header J2. When the button is pressed, PA5 receives a high level through R8. The MCU recognizes the high level as indicating that the button is pressed; when the button is not pressed, PA5 is at a low level. The button press status is identified by the difference in voltage levels.

[0061] One end of the resistor R1 is connected to pin 22 of the main control chip U2, the other end of the resistor R1 is connected to the base of the transistor Q5, the emitter of the transistor Q3 is grounded, and the collector of the transistor Q3 is connected to the light-emitting diode LED1.

[0062] When transistor Q5 is turned on, the negative terminal of the indicator light is grounded, and the indicator light starts working. When the test is successful, the indicator light stays on, and when the test fails, the indicator light flashes to alert the tester.

[0063] Please see Figures 1-16 Pins 4 and 5 of the main control chip U1 are connected to an external ammeter to detect the operating and sleep currents of the BMS under test. Pins 14 and 15 of the main control chip U1 are connected to a 4G module. After the test is completed, the test data is automatically uploaded to the server for archiving and backup. Pins 27 and 28 of the main control chip U1 are connected to pins 27 and 28 of the main control chip U2 through resistors R11 and R12 to realize the communication function. Pins 29 and 30 of the main control chip U2 are connected to pins 29 and 30 of the main control chip U2 to connect to the electronic load.

[0064] Among them, pins 38, 40, 41 and 42 of the main control chip U2 are filtered by capacitors C2, C3, C4 and C5. Pin 45 of the main control chip U2 is connected to resistor R13 and light-emitting diode DQ1. Pin 48 of the main control chip U2 is connected to capacitor C6 and resistor R14 to form an RC filter circuit.

[0065] Please see Figures 1-16 Pin 1 of the main control chip U2 is connected to an external button testing module. Pin 2 of the main control chip U2 is connected to the reset pin of the Bluetooth communicator. When the main Bluetooth communicator encounters a running error, this pin is forcibly reset so that Bluetooth can run normally. Pin 3 of the main control chip U2 is connected to a load simulation module. Pins 29 and 30 of the main control chip U2 are connected to pins 2 and 3 of the pin socket J8 for UART communication.

[0066] Specifically, pins 4, 5, and 6 of the main control chip U2 are used for RS485 communication; pins 8 and 9 are used for CAN communication; pins 12 and 13 of the main control chip U2 communicate with the display screen via SCL and SDA; pins 14 and 15 of the main control chip U2 communicate with the Bluetooth communicator via UART4_RX and UART4_TX; and pins 27 and 28 of the main control chip U2 are connected to pins 27 and 28 of the main control chip U1 to achieve single-chip implementation. For inter-machine communication, pins 38, 40, 41, and 42 of the main control chip U2 are filtered by capacitors C2, C3, C4, and C5. Pin 44 of the main control chip U2 is used to control PWR. Pin 45 of the main control chip U2 is connected to resistor R55 and LED DQ3. Pins 46 and 47 of the main control chip U2 are used for MCU program writing and barcode scanner signal capture. Pin 48 of the main control chip U2 is connected to capacitor C43 and resistor R56 to form an RC filter circuit.

[0067] Please see Figures 1-16 It also includes an isolator U4, pin 1 of which is connected to a filter capacitor C8. Pins 2 and 3 of the isolator U4 are connected to resistors R17 and R18 respectively, and are also connected to pins 14 and 15 of the main control chip U1 for 4G module connection. Pins 4 and 5 of the isolator U4 are grounded. Pins 6 and 7 of the isolator U4 are connected to pins 3 and 4 of the pin socket J5 through resistors R19 and R20. Pin 8 of the isolator U4 obtains a clean voltage through a filter capacitor C9.

[0068] Please see Figures 1-16 It also includes isolation power supplies U5, U6, U7, U8, and U9. Pin 1 of isolation power supply U5 is connected to filter capacitor C10. Pins 2 and 3 of isolation power supply U5 are connected to resistors R21 and R22 respectively, and to pins 4 and 5 of the main control chip U1 for connecting the ammeter. Pins 4 and 5 of isolation power supply U5 are grounded. Pins 6 and 7 of isolation power supply U5 are connected to pins 3 and 4 of the ammeter terminal CON1 via resistors R23 and R24. Pin 2 of isolation power supply U6 is connected to capacitors C14 and C15. Pin 3 of isolation power supply U6 is connected to resistor R26. Pins 4 and 6 of isolation power supply U6 are connected to pins 1 and 3 of isolation transformer T1 to provide input voltage. Schottky diodes D5 and D6 are located at the output of isolation transformer T1.

[0069] Specifically, pin 8 of the isolation power supply U5 obtains a pure voltage through the filter capacitor C11. Under the action of Schottky diodes D5 and D6, the output position of the isolation transformer T1 combines the two 5V channels into one to improve the output current capability. Pins 5 and 6 of the isolation transformer T1 are filtered by RC to obtain a pure output voltage.

[0070] Please see Figures 1-16 Pin 1 of the isolation power supply U7 is connected to the filter capacitor C16. Pins 2 and 3 of the isolation power supply U7 are connected to pins 29 and 30 of the main control chip U1 through resistors R27 and R28, respectively, for connecting the electronic load. Pins 4 and 5 of the isolation power supply U7 are grounded. Pins 6 and 7 of the isolation power supply U7 are connected to pins 2 and 3 of the pin socket J6 through resistors R29 and R30. Pin 8 of the isolation power supply U7 obtains a clean voltage through the filter capacitor C17. Pin 2 of the isolation power supply U8 is connected to capacitors C20 and C21. Pin 3 of the isolation power supply U8 is connected to resistor R32.

[0071] Among them, pins 4 and 6 of the isolation power supply U8 are connected to pins 1 and 3 of the isolation transformer T1 to provide input voltage. The output voltage is combined into one 5V by Schottky diodes D7 and D8 to improve the output current capability. Pins 5 and 6 of the isolation transformer T1 are filtered by RC to obtain a clean output voltage. Pin 1 of the isolation power supply U9 is connected to the filter capacitor C22.

[0072] Since UART3 is multiplexed with the MCU programming port, pins 2 and 3 of the isolation power supply U9 are connected to pins 8 and 7 of the switch SWITCH. When using a barcode scanner, the communication port is switched to the barcode scanner, and the barcode scanner is activated. When programming, the communication port is switched to the programming pin, and the MCU program can be programmed. Pins 4 and 5 of the isolation power supply U9 are grounded. Pins 6 and 7 of the isolation power supply U9 are connected to pins 3 and 4 of the barcode scanner terminal CON2 through resistors R35 and R36. Pin 8 of the isolation power supply U9 obtains a clean voltage through the filter capacitor C23.

[0073] Please see Figures 1-16It also includes relays REL1 and REL3, resistors R37 and R39. Pin 1 of relay REL1 is connected to pin 2 of relay REL1 via switching diode D9 and connected to a 5V power supply. One end of resistor R37 is connected to pin 25 of the main control chip U2, and the other end of resistor R37 is connected to the base of transistor Q3. The emitter of transistor Q3 is grounded, and the collector of transistor Q3 is connected to switching diode D9. Pins 3 and 4 of relay REL1 are connected to pins 1 and 2 of pin socket J7. Pin 2 of relay REL3 is connected to pin 3 of relay REL1 via switching diode D10 and connected to a 5V power supply. One end of resistor R39 is connected to pin 17 of the main control chip U2, and the other end of resistor R39 is connected to the base of transistor Q4. The emitter of transistor Q4 is grounded, and the collector of transistor Q4 is connected to switching diode D10.

[0074] The pins of relays REL2 and REL3 are connected accordingly. When transistor Q3 is turned on, pins 1 and 2 of relay REL1 are enabled, which in turn controls pins 3 and 4 of relay REL1 to conduct. At this time, current can flow through the pin holder J7 for current control calibration. When transistor Q4 is turned on, pins 2 and 3 of relays REL2 and REL3 are enabled, which in turn controls pins 1 and 4 of relays REL2 and REL3 to conduct. At this time, current can flow through the pin holder J8 for current control calibration.

[0075] Please see Figures 1-16 It also includes chips U10, U11, U14, and U16. Chip U10's three input pins are connected to capacitors C26 and C27 for filtering to obtain a clean 5V voltage. Chip U10 is also connected to capacitors C24 and C25, which filter to obtain a clean 3.3V voltage. Furthermore, chip U10 is connected to an LED DQ2; the on / off state of LED DQ2 determines whether there is a 3.3V output, thus achieving a 5V to 3.3V conversion. Pin 2 of chip U11 is connected to capacitors C14 and C15, pin 3 of chip U11 is connected to resistor R43, and pins 4 and 6 of chip U11 are connected to pins 1 and 3 of isolation transformer T1 to provide input voltage. Under the action of Schottky diodes D11 and D12, the input voltage generates an isolated power supply through transformer T1 and then achieves 5V output through diode bus. Pins 5 and 6 of isolation transformer T1 are filtered by RC to obtain a clean output voltage.

[0076] Pin 1 of chip U14 is connected to capacitor C44 for filtering. Pins 2 and 3 of chip U14 are connected to pins 8 and 9 of main control chip U2 through resistors R57 and R58 for CAN communication. Pins 4 and 5 of chip U14 are grounded. Pins 6 and 7 of chip U14 are connected to pins 1 and 4 of chip U15, respectively. Pin 8 of chip U14 is filtered by capacitor C45. Pins 6 and 7 of chip U15 are connected to resistors R63, R64, and R65 and are also connected to pins 8 and 9 of BMS communication interface CON3 for CAN communication with BMS.

[0077] Please see Figures 1-16 Pins 1 and 3 of chip U16 are connected to capacitors C51 and C52. Pin 2 of chip U16 is grounded through filter capacitor C50. Pins 4 and 5 of chip U16 are connected through capacitor C53. Pin 6 of chip U16 is grounded through filter capacitor C54. Pins 11 and 12 of chip U16 are connected to pins 5 and 6 of BMS communication interface CON3 through resistors R66 and R67 for BMS communication. Pins 13 and 14 of chip U16 are connected to pins 3 and 4 of BMS communication interface CON3 through resistors R68 and R69 for RS232 conversion. Pins 15 and 16 of chip U16 are grounded through filter capacitor C55.

[0078] Please see Figures 1-16 It also includes chips U17 and U19. Pins 1 and 2 of chip U17 are connected to capacitor C57 to filter power supply noise. Pins 3, 4, and 5 of chip U17 are connected to resistors R70, R71, and R72 and to pins 6, 5, and 4 of main control chip U2 for RS485 transmission and reception. Pins 8 and 9 of chip U17 are grounded. Pins 12, 13, and 14 of chip U17 are connected to pins 2, 4, and 1 of chip U18 through resistors R73, R74, and R75 to achieve communication with RS485 conversion chip. Pins 15 and 16 of chip U17 are connected to filter capacitor C58. Pins 6 and 7 of chip U18 are connected to pins 1 and 2 of BMS communication interface CON3 through resistors R76, R77, and R78 for RS485 communication with BMS.

[0079] Pin 12 of chip U19 is connected to pin 2 of main control chip U2 via switching diode D13. Pin 10 of chip U19 is filtered by capacitor C38. Pins 17 and 18 of chip U19 are connected to pins 14 and 15 of main control chip U2 via resistors R52 and R53 for Bluetooth communication. Pin 23 of chip U19 is connected to switching diode D14 via resistors R50 and R51 to control the main Bluetooth power enable.

[0080] Please see Figures 1-16 It also includes a pin header J9, with pin 1 of the pin header J9 connected to a 3.3V voltage. Pins 2 and 3 of the pin header J9 are connected to pins 6 and 5 of the SWITCH switch via resistors R7 and R15. Resistors R7 and R15 are connected to Zener diodes D15 and D16 to protect the programming port from damage due to voltage fluctuations. Pins 4 and 5 of the pin header J9 are filtered by capacitor C56.

[0081] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated BMS battery test system characterized by: include: Main control chip: The main control chip is configured in two groups, including main control chip U1 and main control chip U2. The main control chip U1 and main control chip U2 communicate through UART. The main control chip U1 controls the current of the electronic load detection ammeter, and the main control chip U2 is used for data communication, data display and test buttons. Barcode scanner: The barcode scanner is used to scan the BMS serial number; Load simulation module: The electronic load simulation module is used to form a current source with adjustable direction and current; Hardware module: The hardware module includes indicator lights, a buzzer, and an LCD display screen; Communication module: The communication module is used for BMS data exchange, and the communication module includes a Bluetooth communicator; Relay: The relay is used for the isolation and processing of input and output signals.

2. An automated BMS battery test system according to claim 1, wherein: The load simulation module includes a resistor R2, a transistor Q1, an optocoupler PC1, a switching diode D1, and a transistor Q2. The resistor R2 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to a resistor R3, a resistor R4 is provided between pin 1 and pin 2 of the optocoupler PC1, pin 3 of the optocoupler PC1 is connected to the switching diode D1, and pin 4 of the optocoupler PC1 is connected to a resistor R5. The base of transistor Q2 is connected to resistor R6, and the collector of transistor Q2 is connected to switching diode D1 and buzzer U1.

3. An automated BMS battery test system according to claim 2, wherein: The load simulation module also includes a socket J3, a main control chip U3, a button KEY1, a pin socket J2, a resistor R1, and a transistor Q3. Pin 3 of the socket J3 is connected to a resistor R9 and a pull-up resistor R11 and communicates adjacent to the main control chip U3. Pin 4 of the socket J3 is connected to a resistor R10 and a pull-up resistor R12 and communicates adjacent to the main control chip U3. The button KEY1 is connected to the pin socket J2. One end of the resistor R1 is connected to pin 22 of the main control chip U2, the other end of the resistor R1 is connected to the base of the transistor Q5, the emitter of the transistor Q3 is grounded, and the collector of the transistor Q3 is connected to the light-emitting diode LED1.

4. An automated BMS battery test system according to claim 3, wherein: Pins 4 and 5 of the main control chip U1 are connected to an external ammeter. Pins 27 and 28 of the main control chip U1 are connected to pins 27 and 28 of the main control chip U2 through resistors R11 and R12. Pins 29 and 30 of the main control chip U2 are connected to pins 29 and 30 of the main control chip U2 for connecting an electronic load.

5. An automated BMS battery test system according to claim 4, wherein: Pin 1 of the main control chip U2 is connected to an external button test module, pin 2 of the main control chip U2 is connected to the reset pin of the Bluetooth communicator, pin 3 of the main control chip U2 is connected to the load simulation module, and pins 29 and 30 of the main control chip U2 are connected to pins 2 and 3 of the pin socket J8. It also includes isolator U4, pin 1 of which is connected to filter capacitor C8, pins 2 and 3 of which are connected to resistors R17 and R18 respectively and are connected to pins 14 and 15 of main control chip U1 for 4G connection, and pins 6 and 7 of isolator U4 are connected to pins 3 and 4 of pin socket J5 through resistors R19 and R20.

6. An automated BMS battery test system according to claim 5, wherein: It also includes isolation power supplies U5, U6, U7, U8, and U9. Pin 1 of isolation power supply U5 is connected to filter capacitor C10. Pins 2 and 3 of isolation power supply U5 are connected to resistors R21 and R22 respectively, and are also connected to pins 4 and 5 of the main control chip U1 for connection to the ammeter. Pins 6 and 7 of isolation power supply U5 are connected to pins 3 and 4 of ammeter terminal CON1 through resistors R23 and R24. Pin 2 of isolation power supply U6 is connected to capacitors C14 and C15. Pin 3 of isolation power supply U6 is connected to resistor R26. Pins 4 and 6 of isolation power supply U6 are connected to pins 1 and 3 of isolation transformer T1 to provide input voltage. Schottky diodes D5 and D6 are provided at the output position of isolation transformer T1. Pin 1 of the isolation power supply U7 is connected to the filter capacitor C16. Pins 2 and 3 of the isolation power supply U7 are connected to pins 29 and 30 of the main control chip U1 through resistors R27 and R28, respectively. Pins 6 and 7 of the isolation power supply U7 are connected to pins 2 and 3 of the pin socket J6 through resistors R29 and R30. Pin 2 of the isolation power supply U8 is connected to capacitors C20 and C21, and pin 3 of the isolation power supply U8 is connected to resistor R32. Pin 1 of the isolation power supply U9 is connected to the filter capacitor C22. Pins 2 and 3 of the isolation power supply U9 are connected to pins 8 and 7 of the switch SWITCH. Pins 6 and 7 of the isolation power supply U9 are connected to pins 3 and 4 of the barcode scanner terminal CON2 through resistors R35 and R36.

7. An automated BMS battery test system as claimed in claim 6, wherein: It also includes relays REL1 and REL3, resistors R37 and R39. Pin 1 of relay REL1 is connected to pin 2 of relay REL1 via switching diode D9 and connected to a 5V power supply. One end of resistor R37 is connected to pin 25 of the main control chip U2, and the other end of resistor R37 is connected to the base of transistor Q3. The collector of transistor Q3 is connected to switching diode D9. Pins 3 and 4 of relay REL1 are connected to pins 1 and 2 of pin socket J7. Pin 2 of relay REL3 is connected to pin 3 of relay REL1 via switching diode D10 and connected to a 5V power supply. One end of resistor R39 is connected to pin 17 of the main control chip U2, and the other end of resistor R39 is connected to the base of transistor Q4. The collector of transistor Q4 is connected to switching diode D10.

8. An automated BMS battery test system according to claim 7, wherein: It also includes chips U10, U11, U14, and U16. The 3rd input pin of chip U10 is connected to capacitors C26 and C27. Chip U10 is connected to capacitors C24 and C25. Chip U10 is connected to a light-emitting diode DQ2. The 2nd pin of chip U11 is connected to capacitors C14 and C15. The 3rd pin of chip U11 is connected to resistor R43. The 4th and 6th pins of chip U11 are connected to the 1st and 3rd pins of isolation transformer T1. The 1st pin of chip U14 is connected to capacitor C44. The 2nd and 3rd pins of chip U14 are connected to the 8th and 9th pins of main control chip U2 through resistors R57 and R58. The 6th and 7th pins of chip U14 are connected to the 1st and 4th pins of chip U15, respectively. The 6th and 7th pins of chip U15 are connected to resistors R63, R64 and R65 and are also connected to the 8th and 9th pins of BMS communication interface CON3. Pins 1 and 3 of chip U16 are connected to capacitors C51 and C52. Pin 2 of chip U16 is grounded through filter capacitor C50. Pins 4 and 5 of chip U16 are connected through capacitor C53. Pins 11 and 12 of chip U16 are connected to pins 5 and 6 of BMS communication interface CON3 through resistors R66 and R67. Pins 13 and 14 of chip U16 are connected to pins 3 and 4 of BMS communication interface CON3 through resistors R68 and R69.

9. An automated BMS battery test system according to claim 8, wherein: It also includes chips U17 and U19. Pins 1 and 2 of chip U17 are connected through capacitor C57. Pins 3, 4 and 5 of chip U17 are connected to resistors R70, R71 and R72 and are connected to pins 6, 5 and 4 of main control chip U2. Pins 12, 13 and 14 of chip U17 are connected to pins 2, 4 and 1 of chip U18 through resistors R73, R74 and R75. Pins 6 and 7 of chip U18 are connected to pins 1 and 2 of BMS communication interface CON3 through resistors R76, R77 and R78. Pin 12 of chip U19 is connected to pin 2 of main control chip U2 through switching diode D13. Pins 17 and 18 of chip U19 are connected to pins 14 and 15 of main control chip U2 through resistors R52 and R53. Pin 23 of chip U19 is connected to switching diode D14 through resistors R50 and R51.

10. The automated BMS battery test system of claim 9, wherein: It also includes a pin socket J9, pin 1 of which is connected to a 3.3V voltage, and pins 2 and 3 of the pin socket J9 are connected to pins 6 and 5 of the switch via resistors R7 and R15. Resistors R7 and R15 are connected to Zener diodes D15 and D16.

Images