BMS protection board detection system

Abstract

The utility model provides a BMS protection board detection system, and relates to the BMS protection technology field, the detection system comprises a controller, the controller realizes general control of each module, the detection system comprises a power supply module, the power supply module can provide 5V and 3.3 V voltages, the detection system is characterized by comprising a plurality of temperature detection modules and an electric quantity acquisition module, the temperature detection module and the electric quantity acquisition module are in communication connection with the controller, the problems that the whole process needs manual guarding, manual adjustment is often needed, and the whole process is long and is easily interfered by human factors are solved, and the overcurrent of the BMS can be automatically adjusted, so that automatic operation is achieved, and the working efficiency is improved. The maximum over-current capability of the protection plate is accurately obtained, the test specifications are unified, and the artificial participation process is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of BMS protection, and in particular to a BMS protection board detection system. Background Art

[0002] There is an important indicator in the parameters of the BMS protection board: the overcurrent protection parameter. In addition to the charging and discharging capabilities of the battery cells, the overcurrent protection parameter also needs to be determined based on the hardware overcurrent capability of the protection board itself.

[0003] Normally, when testing the maximum overcurrent capacity of the protection board, the protection board needs to be placed in a high-temperature aging box, and then the current through the BMS protection is manually adjusted according to the temperature of the two ends of the MOS tube. The aging process continues until the temperature reaches a stable state. If the temperature is too high, the current needs to be reduced. If the temperature is too low, the current needs to be increased. The entire process requires human supervision and frequent manual adjustments. The entire process is long and easily interfered by human factors. Utility Model Content

[0004] The present invention proposes a BMS protection board detection system, which automatically adjusts the overcurrent size of the BMS, thereby achieving automated operation, accurately obtaining the maximum overcurrent capacity of the protection board, unifying the test specifications, and reducing the process of manual participation.

[0005] The technical solution of the present invention is as follows:

[0006] A BMS protection board detection system includes a controller, which realizes overall control of each module. The detection system consists of a power supply module, which can provide 5V and 3.3V voltages. It is characterized in that it includes multiple temperature detection modules and power collection modules, and the temperature detection module and the power collection module are communicatively connected to the controller.

[0007] As a further optimization of this solution, it also includes a download reset module, which is connected to the asynchronous reset pin of the controller. The standard port and clock port of the download reset module are communicatively connected to the controller to realize downloading and writing of information.

[0008] As a further optimization of this solution, a constant current power supply isolation communication module is also included, which includes a power supply chip U10 and a digital isolator U11. The digital isolator U11 is communicatively connected to the controller, and the VDD1 pin of the digital isolator U11 is directly powered by a 5V voltage source. The VDD2 pin of the digital isolator U11 is powered by the power supply chip U10. The power supply chip U10 is powered by a 5V voltage source, and the digital isolator U11 provides power supply support for the outside.

[0009] As a further optimization of the present solution, a touch communication module is further included. The touch communication module includes a connecting wire FPC1. One end of the connecting wire FPC1 is connected to the controller for communication, and the other end of the touch communication module is used for an external display unit.

[0010] As a further optimization of this solution, the number of the temperature detection modules is two, and the circuit principle is the same. The temperature detection module includes a thermocouple amplifier U4, which is communicatively connected to the controller. The thermocouple amplifier U4 is powered by a 5V voltage source through a voltage regulator tube. The other end of the thermocouple amplifier U4 is connected to an interface CN1, and the interface CN1 is used for an external temperature sensor.

[0011] As a further optimization of this solution, the power collection module includes a DC power supply monitor U8, which is communicatively connected to the controller. The VBUS input of the DC power supply monitor U8 is connected to an interface CN2, and the interface CN2 is used to detect the voltage value at both ends of an external MOS tube. The VIN- pin and VIN+ pin of the DC power supply monitor U8 are connected to an interface CN4 after a voltage divider circuit, and the interface CN4 is used for external current detection.

[0012] As a further optimization of this solution, the power supply module includes a +5V voltage regulator, a -5V voltage regulator and a 3.3V voltage regulator. The input of the ±5V voltage regulator is connected to the interface U2, the output of the +5V voltage regulator is used as a 5V power supply, the output of the +5V voltage regulator is also connected to the input of the 3.3V voltage regulator, the output of the 3.3V voltage regulator is used as a 3.3V voltage source, and the output of the -5V voltage regulator is used as a -5V potential.

[0013] The working principle and beneficial effects of the present invention are:

[0014] This solution adjusts and modifies parameters through touch buttons, and displays the modified parameters, real-time data and test results on the LCD screen.

[0015] The thermocouple measurement circuit is mainly used to detect the temperature of the BMS protection board under test. The current detection and voltage detection circuits can detect the current of the BMS protection board under test and the voltage drop at both ends.

[0016] The test device controls the BUCK constant current circuit to apply current to the tested BMS protection board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a principle block diagram of this application;

[0019] Figure 2 This is a circuit diagram of the controller connection in this application;

[0020] Figure 3 This is a circuit diagram of the power module in this application;

[0021] Figure 4 This is the circuit schematic diagram of the temperature detection module in this application;

[0022] Figure 5 This is the circuit schematic diagram of the power collection module in this application;

[0023] Figure 6 Download the circuit schematic of the reset module in this application;

[0024] Figure 7 This is the circuit schematic diagram of the constant current power supply isolation communication module in this application;

[0025] Figure 8 This is a circuit diagram of the touch communication module in this application. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] As the instruction manual Figure 1 As shown, a BMS protection board detection system includes a controller, which realizes overall control of each module. The detection system consists of a power supply module, which can provide 5V and 3.3V voltages, including multiple temperature detection modules and power collection modules, and the temperature detection module and the power collection module are communicatively connected to the controller. The present application can simultaneously detect the temperature of the protection board to be tested, and can also determine the status of devices such as MOS tubes by detecting current values ​​and voltage values.

[0028] As the instruction manual Figure 6 As shown, it also includes a download reset module, which is connected to the asynchronous reset pin of the controller, and the standard port and clock port of the download reset module are connected to the controller for communication to realize the download and writing of information. The download reset module is used to write the download program and input commands into the controller.

[0029] As the instruction manual Figure 7As shown, it also includes a constant current power supply isolation communication module, which includes a power supply chip U10 and a digital isolator U11. The digital isolator U11 is connected to the controller for communication. The VDD1 pin of the digital isolator U11 is directly powered by a 5V voltage source, and the VDD2 pin of the digital isolator U11 is powered by the power supply chip U10. The power supply chip U10 is powered by a 5V voltage source, and the digital isolator U11 provides power supply support for the outside. The new power supply U10 plays the role of first-level isolation and provides more stable power supply support for the interface. The digital isolator U11 is directly connected to the interface.

[0030] As the instruction manual Figure 8 As shown, it also includes a touch communication module, the touch communication module includes a connecting wire FPC1, one end of the connecting wire FPC1 is connected to the controller for communication, and the other end of the touch communication module is used for an external display unit. Figure 8 and Figure 2 The touch communication module can be connected to human-computer interaction devices such as touch panels to display the content of the controller or microcontroller and receive commands.

[0031] As the instruction manual Figure 4 As shown, the number of the temperature detection modules is two, and the circuit principle is the same. The temperature detection module includes a thermocouple amplifier U4, which is connected to the controller for communication. The thermocouple amplifier U4 is powered by a 5V voltage source through a voltage regulator tube. The other end of the thermocouple amplifier U4 is connected to an interface CN1, and the interface CN1 is used for an external temperature sensor. The two-way temperature sensors are used to be placed at different positions of the protection board, and the temperature information can be monitored at multiple points. The thermocouple amplifier can amplify the sensor data obtained by the interface CN1 and input it to the controller for easy reading by the controller.

[0032] As the instruction manual Figure 5 As shown, the power acquisition module includes a DC power monitor U8, which is connected to the controller in communication, and the VBUS input of the DC power monitor U8 is connected to an interface CN2, which is used to detect the voltage value at both ends of an external MOS tube, and the VIN-pin and VIN+pin of the DC power monitor U8 are connected to an interface CN4 after a voltage divider circuit, and the interface CN4 is used for external current detection. The model of the core chip DC power monitor U8 of this module is INA226AIDGSR, in which CN2 is used to detect the voltage at both ends of the MOS, and the interface CN4 is used to detect the current of the MOS.

[0033] As the instruction manual Figure 3As shown, the power supply module includes a +5V regulator, a -5V regulator and a 3.3V regulator. The input of the ±5V regulator is connected to an interface U2. The output of the +5V regulator is used as a 5V power supply. The output of the +5V regulator is also connected to the input of the 3.3V regulator. The output of the 3.3V regulator is used as a 3.3V voltage source, and the output of the -5V regulator is used as a -5V potential. The module is powered by an external voltage, wherein the interface U2 is used for an external power supply. This module can achieve 5V point output through a 5V regulator U5, the model of this embodiment is L7805CV, wherein the 3.3V regulator U7 achieves 3.3V potential output. Two point outputs required by this system can be provided.

[0034] The above are only preferred embodiments of the present invention and are 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 BMS protection board detection system, the detection system includes a controller, the controller controls each module, the detection system includes a power supply module, the power supply module can provide 5V and 3.3V voltage, characterized in that: It includes a plurality of temperature detection modules and a power collection module, wherein the temperature detection module and the power collection module are communicatively connected to the controller.

2. A BMS protection board detection system according to claim 1, characterized in that: It also includes a download reset module, which is connected to the asynchronous reset pin of the controller. The standard port and the clock port of the download reset module are connected to the controller for communication, so as to realize the download and writing of information.

3. A BMS protection board detection system according to claim 1, characterized in that: It also includes a constant current power supply isolation communication module, which includes a power supply chip U10 and a digital isolator U11. The digital isolator U11 is communicatively connected to the controller. The VDD1 pin of the digital isolator U11 is directly powered by a 5V voltage source, and the VDD2 pin of the digital isolator U11 is powered by the power supply chip U10. The power supply chip U10 is powered by a 5V voltage source, and the digital isolator U11 provides power supply support for the outside.

4. A BMS protection board detection system according to claim 1, characterized in that: It also includes a touch communication module, which includes a connecting wire FPC1. One end of the connecting wire FPC1 is connected to the controller for communication, and the other end of the touch communication module is used for an external display unit.

5. A BMS protection board detection system according to claim 1, characterized in that: There are two temperature detection modules with the same circuit principle. The temperature detection module includes a thermocouple amplifier U4, which is communicatively connected to the controller. The thermocouple amplifier U4 is powered by a 5V voltage source through a voltage regulator tube. The other end of the thermocouple amplifier U4 is connected to an interface CN1, which is used for an external temperature sensor.

6. A BMS protection board detection system according to claim 1, characterized in that: The power collection module includes a DC power supply monitor U8, which is communicatively connected to the controller. The VBUS input of the DC power supply monitor U8 is connected to an interface CN2, and the interface CN2 is used to detect the voltage value at both ends of an external MOS tube. The VIN- pin and VIN+ pin of the DC power supply monitor U8 are connected to an interface CN4 after a voltage divider circuit, and the interface CN4 is used for external current detection.

7. A BMS protection board detection system according to claim 1, characterized in that: The power supply module includes a +5V regulator, a -5V regulator and a 3.3V regulator. The input of the ±5V regulator is connected to the interface U2, the output of the +5V regulator serves as a 5V power supply, the output of the +5V regulator is also connected to the input of the 3.3V regulator, the output of the 3.3V regulator serves as a 3.3V voltage source, and the output of the -5V regulator serves as a -5V potential.

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