Power domain two-in-one controller VBU

Abstract

A power domain two-in-one controller VBU belongs to the technical field of new energy automobile electric control, the controller VBU comprises a power supply module and a microprocessor module, the power supply module is connected with the microprocessor module, and the power supply module and the microprocessor module are respectively connected with a function module. The function module comprises a CAN communication module, an LIN communication module, an isoSPI communication module, an analog signal detection module, a digital signal detection module and a high-low edge / H bridge / PWM output module. The power supply module supplies power to each functional module; the microprocessor module is used for realizing program downloading and debugging functions; the input end of the power supply interface circuit is used for being connected with a power supply module, a decoupling capacitor is connected to a power supply pin of the power supply interface circuit, noise interference on power supply lines can be filtered out, the microprocessor chip can work stably, each power supply line of the microprocessor chip is externally connected with the decoupling capacitor, and a capacitor is arranged at the voltage input end. The voltage stability is ensured; and low-frequency interference is filtered.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric control of new energy vehicles, and specifically relates to a two-in-one power domain controller VBU. Background Art

[0002] As the degree of automobile electrification and intelligence increases, the drawbacks of distributed electronic and electrical architectures, such as the large number of ECUs, complex logic control and high cost, and difficulty in rapid iteration and update, are becoming increasingly prominent. In this context, the traditional distributed architecture has gradually evolved into a domain-centralized architecture, which gave rise to the concept of domain controllers. As an emerging electronic control unit, domain controllers are gradually becoming the core components of vehicle electrification and intelligence, and are of great significance to improving the performance, efficiency and safety of automobiles.

[0003] At present, there are many types of existing electric vehicle controllers, and there are still problems such as complex electrical architecture, complex hardware structure, low integration, high cost, single function, poor scalability, poor anti-electromagnetic interference performance, easy to be interfered by external electromagnetic radiation, fewer detection channels, and low accuracy.

[0004] The integrated controller also has problems such as the hardware's own low tolerance to abnormal voltage levels, being susceptible to surge voltage and current shocks, and unstable operation; poor electromagnetic compatibility performance, being easily disturbed and affecting system stability; low analog signal acquisition accuracy, resulting in inaccurate external signal acquisition, leading to reduced safety and reliability of the entire system; insufficient redundancy of hardware resources, and the channels of some functional modules only meeting current needs, making subsequent functional expansion impossible; inadequate CAN bus interface circuit design, resulting in poor self-recovery capabilities after a bus failure; and relatively simple fault diagnosis and processing.

[0005] Therefore, it is necessary to continuously improve the performance of the controller to meet people's requirements for the performance of electric vehicles. Utility Model Content

[0006] In view of the above-mentioned problems existing in the existing electric vehicle controllers, the utility model provides a two-in-one power domain controller VBU, which integrates the vehicle controller VCU and the battery management system BMS controller in the distributed electrical architecture of traditional electric vehicles to form a two-in-one power domain controller VBU. VBU integrates the functions of the vehicle controller and the battery management system controller, and has vehicle management and control functions such as vehicle energy distribution management, torque control, safety monitoring, fault diagnosis, brake energy recovery, CAN network management, and battery management system control functions such as charging control, thermal management, safety protection, balancing control, SOC / SOH estimation, etc. VBU integrates and concentrates the algorithms and control strategies of VCU and BMS to realize the processing of key data inside the processor, avoiding the communication delay between distributed architecture controllers and the errors caused by external interference, improving the response speed, stability and safety of vehicle control, simplifying the electronic and electrical architecture of the vehicle, and helping to reduce hardware costs. Its specific technical solutions are as follows:

[0007] A two-in-one power domain controller VBU, the controller VBU comprises a power module and a microprocessor module, the power module is connected to the microprocessor module, and the power module and the microprocessor module are respectively connected to functional modules, the functional modules include a CAN communication module, a LIN communication module, an isoSPI communication module, an analog signal detection module, a digital signal detection module, and a high-low side / H-bridge / PWM output module; the power module supplies power to each functional module; the microprocessor module is used to realize program download and debugging functions.

[0008] The microprocessor module includes a microprocessor chip, which is respectively connected to a power supply interface circuit, a clock signal circuit, a JTAG interface circuit, an air pressure monitoring circuit and a reset circuit; the input end of the power supply interface circuit is used to connect to the power supply module to realize power supply, and a decoupling capacitor is connected to the power supply pin of the power supply interface circuit, which can filter out noise interference on the power supply line so that the microprocessor chip can work stably. Each power supply line of the microprocessor chip is externally connected to a decoupling capacitor, and capacitors are set at the 0.8V and 3.3V voltage input ends to ensure voltage stability and filter out low-frequency interference; the clock signal source of the clock signal circuit uses a 24M passive crystal oscillator with 2 matching capacitors, and the two output signals are directly connected to the clock pin of the microprocessor. The clock signal circuit provides a stable clock for the inside of the microprocessor chip The JTAG interface circuit is directly led out from the microprocessor chip pin to the 7-Pin JTAG contact, and is pulled up to 3.3V or pulled down to ground through a 10K resistor in series. The JTAG interface circuit is connected to an external emulator to realize the debugging and downloading functions of the program. The chip of the air pressure monitoring circuit is connected to the pin of the microprocessor chip. The air pressure monitoring circuit is used to monitor the air pressure status in real time, and make real-time adjustments for external devices under different air pressure values ​​to ensure stable operation. The reset circuit uses a watchdog chip, and the GPIO pin of the microprocessor chip is connected to the signal input pin of the watchdog chip as a dog feeding signal. When the microprocessor module has a program runaway or freeze problem, the reset circuit can be reset in time and restart work.

[0009] The power module uses automotive power supply BUCK1 chip, BUCK2 chip, LDO1 chip, LDO2 chip and LDO3 chip. The power supply range of BUCK1 chip is 3.3V-40V, and it can output 5.76V voltage rail as the input power supply of the subsequent chip. The BUCK1 chip is connected to the LDO1 chip to generate 3.3V output. The 3.3V output is used to power each functional module on the one hand, and on the other hand, it generates 0.8V output through the BUCK2 chip to power the microprocessor module; 4 LDO2 chips are connected to the BUCK1 chip to generate 4 outputs, each of which outputs 5V voltage and 200mA current, of which 1 output is generated by the LDO3 chip The 3.3V output provides an analog reference voltage to the microprocessor module, which is the reference voltage for the analog signal detection function. The other three outputs are used to power external sensors. The input end of the BUCK1 chip is connected to the output end of the power supply filter circuit, and the input end of the power supply filter circuit is connected to the battery. The power supply filter circuit filters out the interference signal, surge voltage and current on the power supply line that affect the stability of the BUCK1 chip, and on the other hand, filters out the external electromagnetic interference signal generated by the BUCK1 chip. The BUCK1 chip is also connected to a wake-up signal input circuit, which can receive the wake-up signal source input and the error shutdown input and realize the wake-up source detection.

[0010] The power supply filter circuit connects the TVS protection diode and a 1uf capacitor in parallel to the connector port, and then connects the common-mode inductor and diode in series. Then, it connects a 680uF electrolytic capacitor, a 10uF capacitor, and a 100nF capacitor in parallel. Then, it connects a 4.7uH inductor in series, and finally connects a 4.7uF capacitor in parallel.

[0011] The CAN communication module is used for the controller VBU to receive CAN information from the external controller to ensure real-time communication between the controller VBU and the external controller; the CAN communication module has 5-way CAN communication, and all 5-way CAN communication have independent enable and disable control functions, of which 1-way CAN communication is the CAN1 bus interface circuit, which also has a wake-up function and is one of the wake-up sources of the power module; one end of the CAN communication module is connected to the CAN controller carried by the microprocessor module, and the other end of the CAN communication module is connected to 5-way CAN bus interface circuits, namely the CAN1 bus interface circuit, and the CAN2 to CAN5 bus interface circuits. The implementation method of each CAN bus interface circuit is the same, that is, common-mode chokes, bypass capacitors and balancing resistors are connected in series on the two differential signals at the output end.

[0012] The LIN communication module acts as the master node of the LIN bus to communicate with the slave node and receive the LIN signal sent by the slave node. The LIN communication module uses a LIN communication chip, namely a LIN transceiver. A diode and a 1K resistor are connected in series between the INH pin and the LIN pin of the LIN communication chip to realize the active working mode of the LIN communication module.

[0013] The analog signal detection module is used for collecting and processing sensor data. The analog signal detection module provides 17 external analog signal input detection channels and 3 5V sensor power supply internal detection channels; among the 17 external analog signal input detection channels, the circuits of the 1st to 8th external analog signal input detection channels are the same, including a filter circuit, a protection plus follower circuit and a voltage divider circuit from the input end, which can be converted into voltage-type detection or resistance-type detection according to needs, so as to facilitate different detection needs; the circuits of the 9th to 16th external analog signal input detection channels are the same, including a voltage divider circuit, a protection circuit and a filter circuit from the input end, which are voltage-type detection, and the voltage is directly collected by the microprocessor chip after being divided by a resistor; the 17th external analog signal input detection channel is used as a current sensor current detection channel; the protection plus follower circuit or the protection circuit can protect the safety of the analog signal acquisition circuit and the microprocessor chip from being damaged when there is interference from a high-voltage pulse signal, thereby improving the anti-interference of the analog signal detection module and the accuracy of analog signal detection.

[0014] The digital signal detection module is used for switch signal acquisition. The digital signal detection module provides 16 external digital signal detection circuits and 4 external frequency signal detection circuits. Each external digital signal detection circuit includes a voltage divider circuit and a filter circuit in sequence from the external digital signal input end. The external digital signal input is transmitted to the microprocessor module after voltage division and filtering. Among them, 12 external digital signal detection circuits are high-level valid, and 4 external digital signal detection circuits are configurable high or low-level valid; each external frequency signal detection circuit includes a voltage divider circuit and a filter circuit in sequence from the external frequency signal input end. The external frequency signal input is transmitted to the microprocessor module after voltage division and filtering.

[0015] The high-side and low-side / H-bridge / PWM output module is used to drive and control actuators (such as motors, solenoid valves, relays). The high-side and low-side / H-bridge / PWM output module includes high-side and low-side chips, high-side chips, 1.5W high-power transistors and H-bridge chips. The high-side and low-side chips, high-side chips, high-power transistors and H-bridge chips are connected to the microprocessor module respectively; the high-side and low-side chips provide 6 high-side switch outputs and 6 low-side switch outputs, and a single channel can support a maximum current of 0.5A; the high-side chip provides 4 high-current high-side outputs, and the maximum current of the first 2 outputs is 72A, the maximum current of the last 2 channels is 34.5A; the high-side and low-side chips and the high-side chip are controlled by an SPI bus, which can realize the switch control of any channel; the 1.5W high-power transistor provides 4 10A / 5KHz low-side outputs and 4 PWM outputs, each low-side output and each PWM output is realized by a 1.5W high-power transistor with a protection circuit, with over-current, over-temperature and clamping protection functions, and the PWM output is also compatible with the low-side output function; the H-bridge chip provides a group of 10A high-current H-bridge outputs.

[0016] The isoSPI communication module is used for data transmission between the controller VBU and the external sensor IBS (sensor IBS for collecting battery status), so that the controller VBU can monitor the working status of the battery in real time in order to execute the corresponding control logic; the isoSPI communication module is sequentially provided with an isolation interface chip, a balanced filter circuit, and an isolation transformer from the SPI signal end of the microprocessor module. The isolation interface chip converts the full-duplex SPI signal of up to 1Mbps into an isoSPI differential signal, and then connects the balanced filter circuit and the isolation transformer through a twisted pair to transmit the isoSPI differential signal.

[0017] The utility model provides a two-in-one power domain controller VBU, which has the following beneficial effects compared with the prior art:

[0018] 1. The microprocessor module is the basic circuit that allows the microprocessor to work stably and reliably. It is the core module of the VBU. Whether it works normally or not will directly affect the realization of system functions. The microprocessor of this utility model adopts a high-performance E3210 main control chip, which has rich on-chip resources, powerful computing power, and strong scalability.

[0019] 2. The two-in-one controller VBU can achieve high-stability and wide-range power supply, can withstand the impact of surge voltage and current, and ensure the stability, reliability and safety of the system operation;

[0020] 3. The two-in-one controller VBU supports multiple communication methods to meet the communication needs of various external devices and is easy to integrate into the customer system;

[0021] 4. The two-in-one controller VBU realizes high-precision external signal detection and can accurately collect various analog, digital, and frequency signals, providing a reliable data source for control strategies and improving system safety, reliability, and stability.

[0022] 5. There are many resource channels, various specifications and redundant design, which are highly compatible and can meet various application requirements;

[0023] 6. All electronic components are automotive-grade. At the same time, the PCB design of the hardware circuit uses electronic expertise and a lot of practical experience to achieve good electromagnetic compatibility, with excellent isolation measures and EMC anti-interference capabilities, which greatly improves the stability and safety of the hardware circuit.

[0024] 7. Through the integrated design of high and low side output, PWM output and H-bridge output functions, the beneficial effects of high power, low manufacturing cost and small storage volume are achieved.

[0025] 8. The power module plays a critical role in the VBU hardware circuit. Its stability is directly related to whether the entire VBU works normally. Its working environment is very harsh, the external power supply voltage range is large, and sometimes it has to face the impact of surge current on the power module. The peripheral devices of the power chip of this utility model are optimized and adjusted based on the circuit recommended in the data manual, forming a unique design, which greatly improves the working stability of this module. A battery voltage monitoring circuit is designed to monitor the battery voltage through the analog signal acquisition port of the microprocessor module to ensure that the system can understand the current voltage value in real time. A power supply filter circuit is added to the power input end to filter out the interference signal, surge voltage and current on the power supply line on the one hand, and the influence on the stability of the BUCK1 chip on the stability of the BUCK1 chip on the other hand. The external electromagnetic interference signal generated by the BUCK1 chip is filtered out. The wake-up signal input circuit is connected to the enable input pin of the chip to support multiple wake-up source inputs, 1-way error shutdown input and wake-up source detection.

[0026] 9. The CAN module of the utility model is the hardware basis for the VBU to communicate with other controllers. Only when the CAN module works normally can the VBU correctly receive CAN information and ensure real-time communication with other controllers.

[0027] 10. The high-side and low-side / H-bridge / PWM output module uses chips with multi-channel, over-current, over-voltage, under-voltage and over-temperature protection functions and high-power transistors with protection circuits. It can provide 10 high-side outputs, 10 low-side outputs, 4 PWM outputs, and one set of H-bridges.

[0028] 11. To improve system safety and data integrity, the battery pack and VBU need to be electrically isolated. Each of the common 4-wire SPI signals needs to be isolated, which means high cost, and as the transmission distance becomes longer, its transmission stability becomes worse. Therefore, the utility model uses the 2-wire isoSPI, which is a simple two-wire adaptation standard serial peripheral interface. The isoSPI interface converts the full-duplex SPI signal up to 1Mbps into a differential signal, and then transmits the differential signal through a twisted pair plus a simple, low-cost transformer. Compared with ordinary SPI communication, isoSPI requires fewer isolated signals, has better transmission effect, and has a longer transmission distance. Its transmission distance can reach 100 meters, with less transmission loss and faster speed.

[0029] 12. A special power supply filter circuit is designed. After connecting a TVS protection diode and a 1uf capacitor in parallel to the connector port, a common-mode inductor and a diode are connected in series, followed by a 680uF electrolytic capacitor, a 10uF capacitor, and a 100nF capacitor in parallel, followed by a 4.7uH inductor in series, and finally a 4.7uF capacitor in parallel. This circuit design can achieve a very good filtering effect, and can completely filter out the interference signals, surge voltages and currents on the power supply line that affect the stability of the BUCK1 chip, and can filter out the external electromagnetic interference signals generated by the BUCK1 chip, making the controller work very stably and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the hardware architecture of a two-in-one power domain controller VBU of the utility model:

[0031] Figure 2 It is a schematic diagram of the architecture of a microprocessor module of a two-in-one power domain controller VBU and the connection between the microprocessor module and the power module of the utility model;

[0032] Figure 3 It is a power supply interface circuit in a microprocessor module of a power domain two-in-one controller VBU of the utility model, and a connection circuit diagram of the power supply interface circuit and a microprocessor chip (partial interface);

[0033] Figure 4 It is a clock signal circuit in a microprocessor module of a two-in-one power domain controller VBU of the utility model, and a connection circuit diagram of the clock signal circuit and a microprocessor chip (partial interface);

[0034] Figure 5 It is a JTAG interface circuit in a microprocessor module of a power domain two-in-one controller VBU of the utility model, and a connection circuit diagram of the JTAG interface circuit and a microprocessor chip (partial interface);

[0035] Figure 6It is a circuit diagram of the air pressure monitoring circuit in the microprocessor module of the power domain two-in-one controller VBU of the utility model, and the connection circuit between the air pressure monitoring circuit and the microprocessor chip (partial interface);

[0036] Figure 7 This is a reset circuit in a microprocessor module of a two-in-one power domain controller VBU of the utility model, and a connection circuit diagram of the reset circuit and a microprocessor chip (partial interface);

[0037] Figure 8 This is a schematic diagram of the power module architecture of a two-in-one power domain controller VBU of the utility model;

[0038] Fig. 9 This is a power supply filter circuit diagram of a power module of a two-in-one power domain controller VBU of the utility model;

[0039] Fig.10 It is a schematic diagram of the architecture of a CAN communication module of a two-in-one power domain controller VBU of the utility model, and the connection between the CAN communication module, the microprocessor module and the power module;

[0040] Fig.11 It is a CAN1 bus interface circuit in a CAN communication module of a power domain two-in-one controller VBU of the utility model;

[0041] Fig.12 It is a CAN2 bus interface circuit, a CAN3 bus interface circuit, a CAN4 bus interface circuit or a CAN5 bus interface circuit in a CAN communication module of a power domain two-in-one controller VBU of the utility model;

[0042] Fig.13 It is a schematic diagram of the architecture of a LIN communication module of a two-in-one power domain controller VBU and the connection between the LIN communication module, the microprocessor module and the power module of the utility model;

[0043] Fig.14 This is a circuit diagram of a LIN communication module of a two-in-one power domain controller VBU of the utility model;

[0044] Fig.15 It is a schematic diagram of the architecture of an analog signal detection module of a two-in-one power domain controller VBU and the connection between the analog signal detection module, the microprocessor module and the power module of the utility model;

[0045] Fig.16 It is a circuit diagram of an external analog signal input detection channel of any one of the 1st to 8th channels in an analog signal detection module of a power domain two-in-one controller VBU of the utility model;

[0046] Fig.17It is a circuit diagram of an external analog signal input detection channel of any one of the 9th to 16th channels in an analog signal detection module of a power domain two-in-one controller VBU of the utility model;

[0047] Fig.18 This is a circuit diagram of the 17th external analog signal input detection channel in an analog signal detection module of a power domain two-in-one controller VBU of the utility model;

[0048] Fig.19 It is a circuit diagram of any one of the internal detection circuits of the three-way 5V sensor power supply in the analog signal detection module of the power domain two-in-one controller VBU of the utility model;

[0049] Fig. 20 It is a schematic diagram of the digital signal detection module of a two-in-one power domain controller VBU of the utility model, and the architecture of the connection between the digital signal detection module and the microprocessor module;

[0050] Fig.21 This is a high-level effective external digital signal detection circuit diagram in a digital signal detection module of a power domain two-in-one controller VBU of the utility model;

[0051] Fig. 22 This is a digital signal detection module of a power domain two-in-one controller VBU of the utility model, which can be configured with a high or low level effective external digital signal detection circuit diagram;

[0052] Fig.23 This is a circuit diagram of an external frequency signal detection in a digital signal detection module of a two-in-one power domain controller VBU of the utility model;

[0053] Fig.24 It is a schematic diagram of the architecture of the high-low side / H-bridge / PWM output module of a two-in-one power domain controller VBU of the utility model, and the connection between the high-low side / H-bridge / PWM output module and the microprocessor module;

[0054] Fig.25 This is a high-side output circuit diagram and part of the low-side output circuit in the high-low side / H-bridge / PWM output module of a power domain two-in-one controller VBU of the utility model;

[0055] Fig.26 This is a low-side output circuit diagram of a high-low side / H-bridge / PWM output module of a power domain two-in-one controller VBU of the utility model;

[0056] Fig. 27 This is a PWM output circuit diagram in a high-low side / H-bridge / PWM output module of a power domain two-in-one controller VBU of the utility model;

[0057] Fig.28 This is an H-bridge output circuit diagram in a high-low side / H-bridge / PWM output module of a power domain two-in-one controller VBU of the utility model;

[0058] Fig.29 It is a schematic diagram of an isoSPI communication module of a two-in-one power domain controller VBU and an architecture of the connection between the isoSPI communication module and a microprocessor module of the utility model;

[0059] Fig.30 This is a circuit diagram of an isoSPI communication module of a two-in-one power domain controller VBU of the utility model. DETAILED DESCRIPTION

[0060] The following is a combination of specific implementation cases and attached Figure 1-Figure 30 The present invention is further described below, but the present invention is not limited to these embodiments.

[0061] Example 1

[0062] A two-in-one power domain controller VBU, such as Figure 1 As shown, the controller VBU includes a power module and a microprocessor module. The power module is connected to the microprocessor module, and the power module and the microprocessor module are respectively connected to functional modules. The functional modules include a CAN communication module, a LIN communication module, an isoSPI communication module, an analog signal detection module, a digital signal detection module, and a high-low side / H-bridge / PWM output module; the power module supplies power to each functional module; and the microprocessor module is used to realize the download and debugging functions of the program.

[0063] like Figure 2 As shown, the microprocessor module includes a microprocessor chip, and the microprocessor chip is respectively connected to a power supply interface circuit, a clock signal circuit, a JTAG interface circuit, an air pressure monitoring circuit and a reset circuit; the input end of the power supply interface circuit is used to connect to the power supply module to realize power supply, and a decoupling capacitor is connected to the power supply pin of the power supply interface circuit, which can filter out noise interference on the power supply line so that the microprocessor chip can work stably. Each power supply line of the microprocessor chip is externally connected to a decoupling capacitor, and capacitors are set at the 0.8V and 3.3V voltage input ends to ensure voltage stability and filter out low-frequency interference. Figure 3 As shown; the clock signal source of the clock signal circuit uses a 24M passive crystal oscillator, with two matching capacitors, and the two output signals are directly connected to the clock pin of the microprocessor. The clock signal circuit provides a stable time reference for the inside of the microprocessor chip, allowing the microprocessor chip to work in a coordinated manner, such as Figure 4As shown in the figure, the JTAG interface circuit is directly led out from the microprocessor chip pin to the 7-Pin JTAG contact, and a 10K resistor is connected in series to pull it up to 3.3V or pull it down to ground. The JTAG interface circuit is connected to an external emulator to realize the debugging and downloading functions of the program, such as Figure 5 As shown; the chip of the air pressure monitoring circuit is connected to the pin of the microprocessor chip. The air pressure monitoring circuit is used to monitor the air pressure status in real time and make real-time adjustments for external devices under different air pressure values ​​to ensure stable operation. Figure 6 As shown in the figure, the reset circuit uses a watchdog chip. The GPIO pin of the microprocessor chip is connected to the signal input pin of the watchdog chip as a watchdog feeding signal. When the microprocessor module has a program runaway or crash problem, the reset circuit can be reset in time and restart work. Figure 7 shown.

[0064] like Figure 8 As shown, the power module uses automotive power supply BUCK1 chip, BUCK2 chip, LDO1 chip, LDO2 chip and LDO3 chip. The power supply range of BUCK1 chip is 3.3V-40V, and it can output 5.76V voltage rail as the input power supply of the subsequent chip. The BUCK1 chip is connected to the LDO1 chip to generate 3.3V output. The 3.3V output is used to power each functional module on the one hand, and on the other hand, it generates 0.8V output through the BUCK2 chip to power the microprocessor module; 4 LDO2 chips are connected to the BUCK1 chip to generate 4 outputs, each of which outputs 5V voltage and 200mA current, of which 1 output is connected to the LDO3 chip Generate 3.3V output to provide analog reference voltage to the microprocessor module, which is the reference voltage for analog signal detection function. The other 3 outputs are used to power external sensors. The input end of the BUCK1 chip is connected to the output end of the power supply filter circuit. The input end of the power supply filter circuit is connected to the battery. The power supply filter circuit filters out the interference signal, surge voltage and current on the power supply line that affect the stability of the BUCK1 chip. On the other hand, it filters out the external electromagnetic interference signal generated by the BUCK1 chip. The BUCK1 chip is also connected to a wake-up signal input circuit. The wake-up signal input circuit can receive the wake-up signal source input and the error shutdown input and realize the wake-up source detection.

[0065] like Fig. 9 As shown, the power supply filter circuit is connected in parallel with a TVS protection diode and a 1uf capacitor at the connector port, and then connected in series with a common mode inductor and a diode, and then connected in parallel with a 680uF electrolytic capacitor, a 10uF capacitor, and a 100nF capacitor, and then connected in series with a 4.7uH inductor, and finally connected in parallel with a 4.7uF capacitor. The circuits of the BUCK1 chip, BUCK2 chip, LDO1 chip, LDO2 chip, and LDO3 chip are conventional circuits of the prior art, and the wake-up signal input circuit is a conventional circuit of the prior art.

[0066] like Fig.10 As shown, the CAN communication module is used for the controller VBU to receive CAN information from the external controller to ensure real-time communication between the controller VBU and the external controller; the CAN communication module is a 5-way CAN communication, and the 5-way CAN communication has independent enable and disable control functions, of which 1-way CAN communication is the CAN1 bus interface circuit, which also has a wake-up function and is one of the wake-up sources of the power module; one end of the CAN communication module is connected to the CAN controller carried by the microprocessor module, and the other end of the CAN communication module is connected to 5-way CAN bus interface circuits, namely the CAN1 bus interface circuit, CAN2 to CAN5 bus interface circuits, and the implementation method of each CAN bus interface circuit is the same, which is to connect a common-mode choke, a bypass capacitor and a balancing resistor in series on the two differential signals at the output end. Among them, the CAN1 bus interface circuit is as follows Fig.11 As shown, the CAN2 to CAN5 bus interface circuits are the same. Any one of the CAN2 to CAN5 bus interface circuits is as follows Fig.12 shown.

[0067] like Fig.13 As shown in the figure, the LIN communication module acts as the master node of the LIN bus to communicate with the slave node and receive the LIN signal sent by the slave node. The LIN communication module uses a LIN communication chip, namely a LIN transceiver. A diode and a 1K resistor are connected in series between the INH pin and the LIN pin of the LIN communication chip to realize the active working mode of the LIN communication module. The circuit of the LIN communication module is shown in the figure Fig.14 shown.

[0068] like Fig.15 As shown, the analog signal detection module is used for the collection and processing of sensor data. The analog signal detection module provides 17 external analog signal input detection channels and 3 5V sensor power supply internal detection channels; among the 17 external analog signal input detection channels, the circuits of the 1st to 8th external analog signal input detection channels are the same, and they include a filter circuit, a protection and follower circuit and a voltage divider circuit in sequence from the input end, which can be converted into voltage-type detection or resistance-type detection according to the needs, so as to facilitate different detection needs; the circuits of the 9th to 16th external analog signal input detection channels are the same, and they include a voltage divider circuit, a protection circuit and a filter circuit in sequence from the input end, which are voltage-type detection, and the voltage is directly collected by the microprocessor chip after the voltage is divided by the resistor; the 17th external analog signal input detection channel is used as the current sensor current detection channel; the protection and follower circuit or the protection circuit can protect the safety of the analog signal acquisition circuit when there is interference from a high-voltage pulse signal, protect the microprocessor chip from damage, and improve the anti-interference of the analog signal detection module and the accuracy of analog signal detection; wherein, the circuit diagram of the 1st to 8th external analog signal input detection channels is as shown in FIG. Fig.16 As shown in the figure, the circuit diagram of the 9th to 16th external analog signal input detection channels is as follows Fig.17 As shown in the figure, the circuit diagram of the 17th external analog signal input detection channel is as follows Fig.18 As shown in the figure, the circuit diagram of the internal detection of the 5V sensor power supply is as follows Fig.19 shown.

[0069] like Fig. 20 As shown, the digital signal detection module is used for switch signal acquisition. The digital signal detection module provides 16 external digital signal detection circuits and 4 external frequency signal detection circuits. Each external digital signal detection circuit includes a voltage divider circuit and a filter circuit in sequence from the external digital signal input end. The external digital signal input is transmitted to the microprocessor module after voltage division and filtering. Among them, 12 external digital signal detection circuits are high-level effective, and 4 external digital signal detection circuits are configurable high or low-level effective; each external frequency signal detection circuit includes a voltage divider circuit and a filter circuit in sequence from the external frequency signal input end. The external frequency signal input is transmitted to the microprocessor module after voltage division and filtering; among them, the high-level effective external digital signal detection circuit is as shown in Fig.21 As shown, the external digital signal detection circuit can be configured as high or low level active. Fig. 22 As shown, the external frequency signal detection circuit is as follows Fig.23 shown.

[0070] like Fig.24 As shown, the high-side and low-side / H-bridge / PWM output module is used to drive and control actuators (such as motors, solenoid valves, and relays). The high-side and low-side / H-bridge / PWM output module includes high-side and low-side chips, high-side chips, 1.5W high-power transistors, and H-bridge chips. The high-side and low-side chips, high-side chips, high-power transistors, and H-bridge chips are connected to the microprocessor module respectively; the high-side and low-side chips provide 6 high-side switch outputs and 6 low-side switch outputs, and a single channel can support a maximum current of 0.5A; the high-side chip provides 4 high-current high-side outputs, and the maximum current of the first 2 outputs is 72A , the maximum current of the last two channels is 34.5A; the high-low side chip and the high side chip are controlled by an SPI bus, which can realize the switch control of any channel; the 1.5W high-power transistor provides 4 10A / 5KHz low-side outputs and 4 PWM outputs. Each low-side output and each PWM output adopts a 1.5W high-power transistor with a protection circuit, which has over-current, over-temperature and clamping protection functions. The PWM output can also be compatible with the low-side output function; the H-bridge chip provides a group of 10A high-current H-bridge outputs; among them, the high-side output circuit is as follows Fig.25 As shown, the low-side output circuit is as follows Fig.26 As shown, the PWM output circuit is as follows Fig. 27 As shown, the H-bridge output circuit is as follows Fig.28 shown.

[0071] like Fig.29 As shown in FIG. 1 , the isoSPI communication module is used for data transmission between the controller VBU and the external sensor IBS (the sensor IBS for collecting the battery status), so that the controller VBU can monitor the working status of the battery in real time, so as to execute the corresponding control logic; the isoSPI communication module is sequentially provided with an isolation interface chip, a balanced filter circuit, and an isolation transformer from the SPI signal end of the microprocessor module. The isolation interface chip converts the full-duplex SPI signal of up to 1Mbps into an isoSPI differential signal, and then connects the balanced filter circuit and the isolation transformer through a twisted pair to transmit the isoSPI differential signal; the isoSPI communication module circuit is shown in FIG. Fig.30 shown.

Claims

1. A two-in-one power domain controller VBU, characterized in that: The controller VBU includes a power module and a microprocessor module. The power module is connected to the microprocessor module, and the power module and the microprocessor module are respectively connected to the functional modules. The functional modules include a CAN communication module, a LIN communication module, an isoSPI communication module, an analog signal detection module, a digital signal detection module, and a high-low side / H-bridge / PWM output module. The power module supplies power to each functional module. The microprocessor module is used to realize the download and debugging functions of the program. The microprocessor module includes a microprocessor chip, which is respectively connected to a power supply interface circuit, a clock signal circuit, a JTAG interface circuit, an air pressure monitoring circuit and a reset circuit; the input end of the power supply interface circuit is used to connect to the power supply module to realize power supply, and a decoupling capacitor is connected to the power supply pin of the power supply interface circuit, which can filter out noise interference on the power supply line so that the microprocessor chip can work stably. Each power supply line of the microprocessor chip is externally connected to a decoupling capacitor, and capacitors are set at the 0.8V and 3.3V voltage input ends to ensure voltage stability and filter out low-frequency interference.

2. A power domain two-in-one controller VBU according to claim 1, characterized in that: The clock signal source of the clock signal circuit uses a 24M passive crystal oscillator, with two matching capacitors, and the two output signals are directly connected to the clock pin of the microprocessor. The clock signal circuit provides a stable time reference for the inside of the microprocessor chip, so that the microprocessor chip can work in a coordinated manner; the JTAG interface circuit is directly led out from the microprocessor chip pin to the 7-Pin JTAG contact, and a 10K resistor is connected in series to pull it up to 3.3V or pull it down to ground. The JTAG interface circuit is connected to an external emulator to realize the debugging and downloading functions of the program; the chip of the air pressure monitoring circuit is connected to the pin of the microprocessor chip. The air pressure monitoring circuit is used to monitor the air pressure status in real time, and make real-time adjustments for external devices under different air pressure values ​​to ensure stable operation; the reset circuit uses a watchdog chip, and the GPIO pin of the microprocessor chip is connected to the signal input pin of the watchdog chip as a dog feeding signal. When the microprocessor module has a program runaway or crash problem, the reset circuit can be reset in time and restart work.

3. A power domain two-in-one controller VBU according to claim 1, characterized in that: The power module adopts the automotive power supply BUCK1 chip, BUCK2 chip, LDO1 chip, LDO2 chip and LDO3 chip. The power supply range of the BUCK1 chip is 3.3V-40V, and it can output a 5.76V voltage rail as the input power supply of the subsequent chip. The BUCK1 chip is connected to the LDO1 chip to generate a 3.3V output. The 3.3V output is used to power each functional module on the one hand, and on the other hand, it generates a 0.8V output through the BUCK2 chip to power the microprocessor module; the BUCK1 chip is connected to four LDO2 chips to generate four outputs, each of which outputs 5V voltage and 200mA current, and one output is generated by the LDO3 chip. The 3.3V output provides an analog reference voltage to the microprocessor module, which is the reference voltage for the analog signal detection function. The other three outputs are used to power external sensors. The input end of the BUCK1 chip is connected to the output end of the power supply filter circuit, and the input end of the power supply filter circuit is connected to the battery. The power supply filter circuit filters out the interference signal, surge voltage and current on the power supply line that affect the stability of the BUCK1 chip, and on the other hand, it filters out the external electromagnetic interference signal generated by the BUCK1 chip. The BUCK1 chip is also connected to a wake-up signal input circuit, which can receive the wake-up signal source input and the error shutdown input and realize the wake-up source detection.

4. A power domain two-in-one controller VBU according to claim 3, characterized in that: The power supply filter circuit connects a TVS protection diode and a 1uf capacitor in parallel to the connector port, and then connects a common-mode inductor and a diode in series, and then connects a 680uF electrolytic capacitor, a 10uF capacitor, and a 100nF capacitor in parallel, and then connects a 4.7uH inductor in series, and finally connects a 4.7uF capacitor in parallel.

5. The power domain two-in-one controller VBU according to claim 1, characterized in that: The CAN communication module is used for the controller VBU to receive CAN information from the external controller to ensure that the controller VBU communicates with the external controller in real time; the CAN communication module is a 5-way CAN communication, and the 5-way CAN communication has independent enable and disable control functions, among which 1-way CAN communication is a CAN1 bus interface circuit, which also has a wake-up function and is one of the wake-up sources of the power module; one end of the CAN communication module is connected to the CAN controller carried by the microprocessor module, and the other end of the CAN communication module is connected to 5-way CAN bus interface circuits, namely the CAN1 bus interface circuit, and the CAN2 to CAN5 bus interface circuits. The implementation method of each CAN bus interface circuit is the same, and a common-mode choke, a bypass capacitor and a balancing resistor are connected in series on the two differential signals at the output end.

6. A power domain two-in-one controller VBU according to claim 1, characterized in that: The LIN communication module acts as the master node of the LIN bus to communicate with the slave node and receive the LIN signal sent by the slave node. The LIN communication module adopts a LIN communication chip, namely a LIN transceiver. A diode and a 1K resistor are connected in series between the INH pin and the LIN pin of the LIN communication chip to realize the active working mode of the LIN communication module.

7. The power domain two-in-one controller VBU according to claim 1, characterized in that: The analog signal detection module is used for collecting and processing sensor data. The analog signal detection module provides 17 external analog signal input detection channels and 3 5V sensor power supply internal detection channels; among the 17 external analog signal input detection channels, the circuits of the 1st to 8th external analog signal input detection channels are the same, and include a filter circuit, a protection and follower circuit and a voltage divider circuit in sequence from the input end, which can be converted into voltage-type detection or resistance-type detection according to needs, so as to facilitate different detection needs; the circuits of the 9th to 16th external analog signal input detection channels are the same, and include a voltage divider circuit, a protection circuit and a filter circuit in sequence from the input end, which are voltage-type detection, and the voltage is directly collected by the microprocessor chip after being divided by a resistor; the 17th external analog signal input detection channel serves as a current sensor current detection channel; the protection and follower circuit or the protection circuit can protect the safety of the analog signal acquisition circuit and protect the microprocessor chip from damage when there is interference from a high-voltage pulse signal, thereby improving the anti-interference of the analog signal detection module and the accuracy of analog signal detection.

8. The power domain two-in-one controller VBU according to claim 1, characterized in that: The digital signal detection module is used for switch signal acquisition. The digital signal detection module provides 16 external digital signal detection circuits and 4 external frequency signal detection circuits. Each external digital signal detection circuit includes a voltage divider circuit and a filter circuit in sequence from the external digital signal input end. The external digital signal input is transmitted to the microprocessor module after voltage division and filtering. Among them, 12 external digital signal detection circuits are high-level effective, and 4 external digital signal detection circuits are configurable high or low-level effective; each external frequency signal detection circuit includes a voltage divider circuit and a filter circuit in sequence from the external frequency signal input end. The external frequency signal input is transmitted to the microprocessor module after voltage division and filtering.

9. The power domain two-in-one controller VBU according to claim 1, characterized in that: The high-low side / H-bridge / PWM output module is used to drive and control the actuator. The high-low side / H-bridge / PWM output module includes a high-low side chip, a high side chip, a 1.5W high-power transistor and an H-bridge chip. The high-low side chip, the high side chip, the high-power transistor and the H-bridge chip are respectively connected to the microprocessor module; the high-low side chip provides 6 high-side switch outputs and 6 low-side switch outputs, and a single channel can support a maximum current of 0.5A; the high-side chip provides 4 high-current high-side outputs, the maximum current of the first 2 outputs is 72A, and the maximum current of the last 2 outputs is 34.5A; the high-low side chip and the high side chip are controlled by an SPI bus, and the switch control of any channel can be realized; The 1.5W high-power transistor provides 4 10A / 5KHz low-side outputs and 4 PWM outputs. Each low-side output and each PWM output is implemented using a 1.5W high-power transistor in conjunction with a protection circuit. It has over-current, over-temperature and clamping protection functions, and the PWM output is also compatible with the low-side output function. The H-bridge chip provides a set of 10A high-current H-bridge outputs.

10. The power domain two-in-one controller VBU according to claim 1, characterized in that: The isoSPI communication module is used for data transmission between the controller VBU and the external sensor IBS, so that the controller VBU can monitor the working status of the battery in real time so as to execute the corresponding control logic; the isoSPI communication module is sequentially provided with an isolation interface chip, a balanced filter circuit, and an isolation transformer from the SPI signal end of the microprocessor module. The isolation interface chip converts the full-duplex SPI signal of up to 1Mbps into an isoSPI differential signal, and then connects the balanced filter circuit and the isolation transformer through a twisted pair to transmit the isoSPI differential signal.

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