Power domain controller of electric vehicle

Abstract

The invention discloses a power domain controller of an electric vehicle. According to the power domain controller, seven controllers including a whole vehicle controller, a charging control unit, a motor controller, a main control board of a battery management unit, a vehicle-mounted charger controller, a direct current conversion controller and a vehicle pile interconnection controller are integrated. According to the invention, the seven controllers, namely, the whole vehicle controller, the charging control unit, the motor controller, the main control board of the battery management unit, the vehicle-mounted charger controller, the direct current conversion controller and the vehicle pile interconnection module, are arranged in the same power domain controller, so that the reuse rate of components is improved, the hard wire connection is reduced, the arrangement bracket of each controller is saved, and the cost is reduced. The size of the whole vehicle is reduced, and the weight is reduced, so that the space and the weight are greatly saved; communication signal interaction among original controllers is reduced, the load rate of a communication network is reduced, and it is ensured that communication of the whole vehicle is more stable and reliable.

Description

Technical Field

[0001] The present invention belongs to the field of vehicle technology, and more specifically, relates to a power domain controller for an electric vehicle. Background Art

[0002] With the rapid development of intelligent and connected automobile industry, electric vehicles are becoming more and more functional and intelligent. Currently, there are a large number of electronic control units connected by wiring harnesses on vehicles, such as Figure 1 As shown, the power domain of the vehicle currently includes seven controllers: vehicle control unit (VCU), charging control unit (CCU), motor controller (MCU), battery management unit (BMS) main control board (slave board is located in the battery pack), on-board charger controller (OBC), DC conversion controller (DCDC), and vehicle-pile interconnection controller (VCIM). Since different electronic control units carry out different functions, the software of automotive electronics has increased significantly, and a large number of new functions require the coordinated implementation of multiple electronic control units, which in turn makes the wiring harness connection and communication interaction between each electronic control unit increase exponentially. How to ensure the normal implementation of functions, timely response of data, and safe and reliable communication has become another challenge currently faced by electric vehicles.

[0003] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0004] The purpose of the present invention is to propose an electric vehicle power domain controller, which integrates seven controllers, including a vehicle controller, a charging control unit, a motor controller, a main control board of a battery management unit, an on-board charger controller, a DC conversion controller, and a vehicle-pile interconnection module, into the same power domain controller to improve the reuse rate of components and reduce the communication interaction between the original controllers. At the same time, it reduces hard-wire connections and saves the layout brackets of each controller, thereby reducing the cost of the entire vehicle, enhancing communication stability, reducing the size, and reducing weight.

[0005] To achieve the above object, the present invention proposes an electric vehicle power domain controller, comprising:

[0006] Power module, wake-up module, analog input module, digital input module, frequency input module, CAN communication module, Ethernet communication module, LIN communication module, Bluetooth communication module, high-side driver module, low-side driver module, H-bridge driver module, control module, IGBT driver module, phase current acquisition module, high-voltage signal acquisition module, resolver module, safety protection module, high-voltage signal acquisition module, insulation resistance detection module, level conversion module, isolation module, inverter, daisy chain communication module, chopper module, resonance module, high-frequency rectifier module, low-pass filter module, EMI filter module, power factor correction module, isolated DCDC module and output rectifier filter module;

[0007] The control module is respectively connected to the wake-up module, the analog input module, the digital input module, the frequency input module, the CAN communication module, the Ethernet communication module, the LIN communication module, the Bluetooth communication module, the high-side driver module, the low-side driver module, the H-bridge driver module, the IGBT driver module, the phase current acquisition module, the high-voltage signal acquisition module, the resolver module, the safety protection module, the high-voltage signal acquisition module, and the insulation resistance detection module;

[0008] The power domain controller integrates seven controllers: vehicle controller, charging control unit, motor controller, main control board of battery management unit, on-board charger controller, DC conversion controller, and vehicle-pile interconnection controller.

[0009] Optionally, in the power domain controller, the power module is used to reasonably distribute the power of each module in the power domain controller according to different power inputs of the whole vehicle system, and to control the power supply in the POWERLATCH mode when the key is powered off; the wake-up signal is received by the wake-up module, and the corresponding module in the power domain controller is activated based on the wake-up signal.

[0010] Optionally, in the power domain controller,

[0011] Collecting and processing analog signals related to the power domain controller through the analog input module, and sending the processed analog signals to the control module;

[0012] Collecting and processing digital signals related to the power domain controller through the digital input module, and sending the processed digital signals to the control module;

[0013] The frequency input module collects and processes the frequency signal related to the power domain controller, and sends the processed frequency signal to the control module.

[0014] Optionally, in the power domain controller,

[0015] The control module performs CAN communication with the vehicle system through the CAN communication module, and the CAN communication module is provided with a protection circuit;

[0016] The control module performs Ethernet communication with the vehicle system through the Ethernet communication module;

[0017] The control module assists the CAN communication and the Ethernet communication through the LIN communication module, and performs data refresh and fault diagnosis. The LIN communication module has the protection function of short circuit to power supply and short circuit to ground;

[0018] The control module performs Bluetooth communication with the charging pile via the Bluetooth communication module;

[0019] The daisy chain communication module is used to communicate with the BMS slave board in the battery pack. The daisy chain communication module has A and B bidirectional daisy chain communication and reverse wake-up source identification functions.

[0020] Optionally, in the power domain controller,

[0021] The control module performs a wake-up drive output and a high-side control output corresponding to the PWM related to the BMS through the high-side drive module;

[0022] The control module controls fast and slow charging relays, thermal management related relays, solenoid valves and various indicator lights through the low-side driver module;

[0023] The control module controls the fast and slow charging locks through the H-bridge driving module;

[0024] The control module controls the inverter through the IGBT drive module;

[0025] The inverter converts the DC power provided by the battery pack into AC power and provides it to the motor. The inverter includes a three-phase full-bridge inverter circuit and an IGBT.

[0026] Optionally, the control module includes:

[0027] A 32-bit high-performance multi-core microcontroller and its minimum circuit, and a 16-bit microcontroller;

[0028] The multi-core single-chip microcomputer realizes the functions of the vehicle controller, charging control unit, motor controller, main control board of the battery management unit, on-board charger controller, DC conversion controller, and vehicle-pile interconnection controller;

[0029] The 16-bit single-chip microcomputer is used to monitor the input of some acquisition ports that do not have real-time requirements;

[0030] The 32-bit high-performance multi-core single-chip microcomputer communicates and interacts with the 16-bit single-chip microcomputer via SPI.

[0031] Optionally, in the power domain controller,

[0032] The control module monitors the vehicle high voltage system through the DC bus voltage, charging voltage, and three-phase voltage collected by the high voltage signal acquisition module;

[0033] The control module collects phase currents through the phase current collection module to monitor the vehicle high voltage system;

[0034] The safety protection module is used to prevent circuit overload and short circuit in the power domain controller, thereby protecting the safety of the vehicle electrical system and electrical equipment;

[0035] The insulation resistance and the positive and negative pole-to-ground voltages of the vehicle-mounted rechargeable energy storage system are detected by the insulation resistance detection module and transmitted to the control module.

[0036] Optionally, in the power domain controller,

[0037] Converting the DC power of the output voltage of the battery pack into the DC power of the first voltage by the chopper module;

[0038] The direct current of the first voltage is processed by the resonant circuit to obtain a sinusoidal alternating current, wherein the resonant circuit has electrical isolation and voltage regulation functions;

[0039] The high-frequency rectifying module rectifies the sinusoidal alternating current to obtain pulsating direct current;

[0040] The pulsating direct current is filtered by the low-pass filter module to obtain a smooth and stable direct current voltage output to power the battery.

[0041] Optionally, in the power domain controller,

[0042] The external DC power input from the external power grid is filtered through the EMI filter module to filter out the interference of the high-frequency pulses of the external power grid on the internal power supply of the electric vehicle, and at the same time reduce the electromagnetic radiation to a minimum;

[0043] The voltage of the filtered external direct current is converted into a stable second voltage through a power factor correction module;

[0044] The second voltage is boosted by an isolated DCDC module to obtain a direct current that meets the voltage level of the battery pack;

[0045] The voltage output by the isolated DCDC module is filtered through the output rectification and filtering module to obtain a stable output voltage to power the battery pack.

[0046] Optionally, in the power domain controller,

[0047] The isolation module is used to isolate the high and low voltage side communication and acquisition to achieve isolation between the high and low voltage signals in the power domain controller board;

[0048] The level conversion module is used to convert the different level signals in the power domain controller board to achieve interaction between the different level signals in the power domain controller board.

[0049] The beneficial effects of the present invention are as follows: the present invention improves the reuse rate of components by integrating seven controllers, namely, the whole vehicle controller, charging control unit, motor controller, main control board of the battery management unit, on-board charger controller, DC conversion controller, and vehicle-pile interconnection controller, into the same power domain controller, thereby reducing the size and weight of the whole vehicle, thereby greatly saving space and weight; reducing the communication signal interaction between the original controllers, greatly reducing the load rate of the communication network, ensuring that the communication of the whole vehicle is more stable and reliable, and greatly reducing the investment in vehicle development costs; reducing the corresponding hard-wired connections, saving the brackets for arranging the controllers, reducing the multi-party collection of the original controllers, reducing costs and layout space, and making the control more stable and reliable.

[0050] The system of the present invention has other characteristics and advantages, which will be apparent from the drawings incorporated herein and the following detailed description, or will be described in detail in the drawings incorporated herein and the following detailed description, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, in which like reference numerals generally represent like components.

[0052] Figure 1 A schematic diagram of a power domain of an electric vehicle according to the prior art of the present invention is shown.

[0053] Figure 2 A schematic diagram of an electric vehicle power domain controller according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0054] The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0055] An electric vehicle power domain controller according to the present invention comprises:

[0056] Power module, wake-up module, analog input module, digital input module, frequency input module, CAN communication module, Ethernet communication module, LIN communication module, Bluetooth communication module, high-side driver module, low-side driver module, H-bridge driver module, control module, IGBT driver module, phase current acquisition module, high-voltage signal acquisition module, resolver module, safety protection module, high-voltage signal acquisition module, insulation resistance detection module, level conversion module, isolation module, inverter, daisy chain communication module, chopper module, resonance module, high-frequency rectifier module, low-pass filter module, EMI filter module, power factor correction module, isolated DCDC module and output rectifier filter module;

[0057] The control module is respectively connected with the wake-up module, the analog input module, the digital input module, the frequency input module, the CAN communication module, the Ethernet communication module, the LIN communication module, the Bluetooth communication module, the high-side drive module, the low-side drive module, the H-bridge drive module, the IGBT drive module, the phase current acquisition module, the high-voltage signal acquisition module, the resolver module, the safety protection module, the high-voltage signal acquisition module, and the insulation resistance detection module;

[0058] The power domain controller integrates seven controllers: vehicle controller, charging control unit, motor controller, main control board of battery management unit, on-board charger controller, DC conversion controller, and vehicle-pile interconnection controller.

[0059] Specifically, the present invention integrates seven controllers, namely, a vehicle control unit (VCU), a charging control unit (CCU), a motor controller (MCU), a main control board of a battery management unit (BMS) (the slave board is located in the battery pack), an on-board charger controller (OBC), a DC conversion controller (DCDC), and a vehicle-pile interconnection controller (VCIM), into a power domain controller, and realizes the functions of the seven controllers through the power domain controller; the power domain controller is composed of a power module, a wake-up module, an analog input module, a digital input module, a frequency input module, a CAN communication module, an Ethernet communication module, a LIN communication module, a Bluetooth communication module, a high-side drive module, a low-side drive module, an H-bridge drive module, a control module, an IGBT drive module, a phase current acquisition module, a high-voltage signal acquisition module, a resolver module, a safety protection module, a high-voltage signal acquisition module, an insulation resistance detection module, a level conversion module, an isolation module, an inverter, a daisy chain communication module, a chopper module, a resonance module, a high-frequency rectifier module, a low-pass filter module, an EMI filter module, a power factor correction module, an isolation DCDC module, and an output rectifier filter module;

[0060] The control module is connected and communicated with the wake-up module, analog input module, digital input module, frequency input module, CAN communication module, Ethernet communication module, LIN communication module, Bluetooth communication module, high-side drive module, low-side drive module, H-bridge drive module, IGBT drive module, phase current acquisition module, high-voltage signal acquisition module, resolver module, safety protection module, high-voltage signal acquisition module, and insulation resistance detection module through the board bus; the IGBT drive module is connected and communicated with the inverter through the board bus, and the inverter is electrically connected to the motor; the daisy chain communication module communicates with the slave board of the battery panel The battery pack, the chopper module, the resonance module, the high-frequency rectifier module, the low-pass filter module and the storage battery are electrically connected in sequence, wherein the chopper module, the resonance module, the high-frequency rectifier module and the low-pass filter module are connected through an intra-board bus, and the battery pack provides power to the storage battery; the external power supply, the EMI filter module, the power factor correction module, the isolation DCDC module, the output rectifier filter module and the battery pack are electrically connected in sequence, wherein the EMI filter module, the power factor correction module, the isolation DCDC module and the output rectifier filter module are connected through an intra-board bus, and the external power supply provides power to the battery pack for charging;

[0061] The present invention integrates seven controllers, namely, the whole vehicle controller, charging control unit, motor controller, main control board of the battery management unit, on-board charger controller, DC conversion controller, and vehicle-pile interconnection controller, into the same power domain controller, thereby improving the reuse rate of components and reducing the communication interaction between the original controllers, making the whole vehicle smaller and lighter, thereby greatly saving space and weight; reducing the communication signal interaction between the original controllers, greatly reducing the load rate of the communication network, ensuring that the communication of the whole vehicle is more stable and reliable; greatly reducing the investment in vehicle development costs; reducing the corresponding hard-wired connections, saving the layout brackets of each controller, reducing the multi-party collection of the original controllers, reducing costs and layout space, and making the control more stable and reliable.

[0062] In one example, in a power domain controller, the power module is used to reasonably distribute the power of each module in the power domain controller according to the different power inputs of the entire vehicle system, and to control the power supply in the POWERLATCH mode when the key is powered off; the wake-up signal is received by the wake-up module, and the corresponding module in the power domain controller is activated based on the wake-up signal.

[0063] Specifically, the power module of the present invention includes: an SBC system (electronic induction brake control system) circuit, and a power conditioning circuit for each chip / circuit in the board; the power supply of the domain controller can be reasonably distributed according to the different power inputs of the whole vehicle system, such as the positive pole of the battery, the ignition key power-on signal, and the rear-end voltage of the main relay, and finally the power required by the single-chip processing system, communication system, actuator, sensor and each circuit in the entire domain controller required by the domain controller is generated. At the same time, the power supply in the POWERLATCH mode when the key is powered off is controlled. The POWERLATCH mode generally refers to a power management or protection mechanism, which is mainly used to ensure the safe operation of electronic equipment under specific conditions; the wake-up module is mainly used to realize the wake-up of the ignition key power-on signal required by the whole vehicle, the door opening wake-up and the CC, CP, CC2, A+ and other signals required by the national standard charging, and simultaneously it is necessary to collect and detect each wake-up signal to realize the circuit protection function for the charging input.

[0064] In one example, in a power domain controller,

[0065] Collect and process analog signals related to the power domain controller through an analog input module, and send the processed analog signals to a control module;

[0066] Collect and process digital signals related to the power domain controller through a digital input module, and send the processed digital signals to a control module;

[0067] The frequency input module collects and processes the frequency signal related to the power domain controller, and sends the processed frequency signal to the control module.

[0068] Specifically, the analog input module can realize the acquisition and processing of accelerator pedal sensors, brake signal sensors, thermal management related temperature sensors, atmospheric pressure sensors, and other reserved resources, and supports the acquisition of various types of signals such as 5V, 12V, NTC resistance signals, and Hall signals; the digital input module is used to realize the acquisition and processing of gear switch signals, mode selection switch signals, high-voltage interlock signals, charging wake-up signals, air conditioning switch signals, PTC switch signals and other reserved signals, and supports high and low level signal acquisition; the frequency input module is used to realize the acquisition and processing of vehicle speed signals, collision signals, charging control signals and other reserved signals, supports 5V and 12V signal acquisition, and can identify frequency / duty cycle.

[0069] In one example, in a power domain controller,

[0070] The control module communicates with the vehicle system via the CAN communication module, and the CAN communication module has a protection circuit;

[0071] The control module communicates with the vehicle system through the Ethernet communication module;

[0072] The control module assists CAN communication and Ethernet communication through the LIN communication module, as well as performs data refresh and fault diagnosis. The LIN communication module has the protection function of short circuit to power supply and short circuit to ground;

[0073] The control module communicates with the charging pile via Bluetooth via the Bluetooth communication module;

[0074] Communicates with the BMS slave board in the battery pack through a daisy chain communication module. The daisy chain communication module has A and B bidirectional daisy chain communication and reverse wake-up source recognition functions.

[0075] Specifically, the communication function of the CAN communication module is used to realize communication interaction with the whole vehicle, and it also has a protection circuit; the Ethernet communication module is used to realize Ethernet communication between the power domain controller and the whole vehicle system, and supports a communication rate of 100Mbit / s; the LIN communication circuit is based on the serial communication protocol, supports 20kbps communication rate, supports master / secondary node communication protocol, supports remote wake-up, mainly provides data refresh and fault diagnosis functions, and has short-circuit to power supply and short-circuit to ground protection functions; the Bluetooth communication module is used to realize Bluetooth communication interaction between the whole vehicle and the charging pile, and then provide a communication loop for the corresponding convenient functions between the vehicle and the charging pile; the daisy chain communication module is used to realize A and B bidirectional daisy chain communication and reverse wake-up source identification, and realize communication interaction between the BMS master and slave boards.

[0076] In one example, in a power domain controller,

[0077] The control module uses the high-side driver module to perform wake-up drive output and high-side control output corresponding to the BMS-related PWM;

[0078] The control module controls fast and slow charging relays, thermal management related relays, solenoid valves and various indicator lights through the low-side driver module;

[0079] The control module controls the fast and slow charging locks through the H-bridge driver module;

[0080] The control module controls the inverter through the IGBT drive module;

[0081] The DC power provided by the battery pack is converted into AC power and provided to the motor through an inverter. The inverter includes a three-phase full-bridge inverter circuit and IGBT.

[0082] Specifically, the high-side driver module is used for the wake-up drive output of the power domain controller, the high-side control output corresponding to the BMS-related PWM, etc., and adopts integrated driver chip control to reduce the increase in controller size caused by the layout; the low-side driver circuit module is used for the control of fast and slow charging relays, thermal management related relays, solenoid valves and various indicator lights, etc., and supports ON / OFF and PWM output; the H-bridge driver module is mainly used for the control of fast and slow charging locks; the IGBT driver module includes a fault and diagnostic circuit, as well as a driver board circuit, which is used to realize the control of the inverter; the inverter is mainly a three-phase full-bridge inverter circuit (including IGBT (insulated gate bipolar transistor)), which converts the DC power provided by the battery pack into AC power through the inverter and provides it to the motor.

[0083] In one example, the control module includes:

[0084] A 32-bit high-performance multi-core microcontroller and its minimum circuit, and a 16-bit microcontroller;

[0085] The functions of the vehicle controller, charging control unit, motor controller, main control board of the battery management unit, on-board charger controller, DC conversion controller, and vehicle-pile interconnection controller are realized through a multi-core single-chip microcomputer;

[0086] Use 16-bit single-chip microcomputer to monitor the input of some acquisition ports that do not have real-time requirements;

[0087] The 32-bit high-performance multi-core microcontroller communicates and interacts with the 16-bit microcontroller via SPI.

[0088] Specifically, the control module includes a 32-bit high-performance multi-core microcontroller and its minimum circuit, and a low-performance 16-bit microcontroller. The 32-bit multi-core microcontroller mainly realizes the control of various input signal acquisition, actuator drive control, CAN / LIN / Ethernet communication, and motor, DCDC (DC-DC converter), OBC (on-board charger) and other logic. The low-performance 16-bit microcontroller integrates a Bluetooth communication module, and at the same time performs input monitoring for some acquisition ports with low real-time requirements, and exchanges information with the 32-bit multi-core microcontroller through SPI (serial peripheral interface).

[0089] In one example, in a power domain controller,

[0090] The control module monitors the vehicle high voltage system through the DC bus voltage, charging voltage, and three-phase voltage collected by the high voltage signal acquisition module;

[0091] The control module collects phase currents through the phase current collection module to monitor the vehicle high voltage system;

[0092] The safety protection module prevents circuit overload and short circuit in the power domain controller, protecting the safety of the vehicle's electrical system and electrical equipment;

[0093] The insulation resistance and the positive and negative pole-to-ground voltages of the on-board rechargeable energy storage system are detected by the insulation resistance detection module and transmitted to the control module.

[0094] Specifically, the high-voltage signal acquisition module is used for DC bus voltage acquisition, charging voltage acquisition, three-phase voltage acquisition and monitoring, etc., to realize the monitoring of high-voltage system related signals; the phase current acquisition module is used to collect phase current to realize the monitoring of vehicle high-voltage system related signals; the safety protection module is mainly composed of a single-chip microcomputer, a monitoring chip (SBC), redundant acquisition of key signals, signal safety threshold judgment, actuator / output emergency shutdown processing circuit, etc., which is used to improve the control stability of the power domain controller; the insulation resistance detection module is designed according to the insulation resistance detection method in the vehicle-mounted rechargeable energy storage system, and can accurately report the positive and negative poles to the ground voltage.

[0095] In one example, in a power domain controller,

[0096] Converting the DC power of the output voltage of the battery pack into the DC power of the first voltage by means of a chopper module;

[0097] The direct current of the first voltage is processed by a resonant circuit to obtain a sinusoidal alternating current, wherein the resonant circuit has electrical isolation and voltage regulation functions;

[0098] The sinusoidal alternating current is rectified by a high-frequency rectifier module to obtain pulsating direct current;

[0099] The pulsating direct current is filtered through a low-pass filter module to obtain a smooth and stable direct current voltage output to power the battery.

[0100] Specifically, the chopper module adopts a full-bridge inverter design, through which the battery pack output voltage is converted into the required output voltage; the resonance module adopts a transformer design, which can not only achieve electrical isolation but also play a voltage regulation role, and performs secondary voltage reduction processing on the voltage generated by the chopper module to obtain sinusoidal alternating current; the high-frequency rectifier module adopts a full-bridge rectifier design, and rectifies the sinusoidal alternating current generated by the resonance module into pulsating direct current; the low-pass filter module is implemented with an R, C, L combination circuit, which is used to filter the pulsating direct current generated by the resonance module to obtain a smooth and stable direct current voltage output to power the battery.

[0101] In one example, in a power domain controller,

[0102] The external DC power input from the external power grid is filtered through the EMI filter module to filter out the interference of the high-frequency pulses of the external power grid on the internal power supply of the electric vehicle, and at the same time reduce the electromagnetic radiation to a minimum;

[0103] The voltage of the filtered external direct current is converted into a stable second voltage through a power factor correction module;

[0104] The second voltage is boosted by an isolated DCDC module to obtain a direct current that meets the voltage level of the battery pack;

[0105] The output voltage of the isolated DCDC module is filtered through the output rectifier and filter module to obtain a stable output voltage to power the battery pack.

[0106] Specifically, the EMI filter module adopts a two-level EMI (electromagnetic interference) filter circuit to filter out the interference of high-frequency pulses of the external power grid on the internal power supply of the electric vehicle, while reducing electromagnetic radiation to a minimum; the power factor correction module adopts an active PFC (power factor correction) design, and through full-bridge rectification and highly integrated chips, the voltage obtained from the external power grid is filtered through the EMI filter module and converted into a highly stable output voltage; the isolated DCDC module adopts a BOOST-type DC / DC converter to boost the stable voltage generated by the power factor correction module to reach the battery voltage level of the electric vehicle; the output filter module is implemented using an R, C, L combination circuit, and the voltage generated by the isolated DCDC module is filtered again to obtain a smooth and stable output voltage to power the battery pack.

[0107] In one example, in a power domain controller,

[0108] The isolation module is used to isolate the high and low voltage side communication and acquisition to achieve isolation between the high and low voltage signals in the power domain controller board;

[0109] The level conversion module is used to convert the different level signals in the power domain controller board to achieve the interaction between the different level signals in the power domain controller board.

[0110] Specifically, the isolation module is used for high and low voltage side communication isolation (through digital isolation chip) and acquisition isolation (through isolated DC / DC step-up and step-down), mainly to achieve isolation between high and low voltage signals within the board; the level conversion module adopts an integrated chip design with multiple level conversion channels, each channel has a separate enable pin, to achieve interaction between different level signals within the power domain controller board.

[0111] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but is not intended to be limiting of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention may be combined with each other without conflict.

[0112] Example:

[0113] like Figure 2 As shown, this embodiment provides an electric vehicle power domain controller, including:

[0114] Power module, wake-up module, analog input module, digital input module, frequency input module, CAN communication module, Ethernet communication module, LIN communication module, Bluetooth communication module, high-side driver module, low-side driver module, H-bridge driver module, control module ( Figure 2 uC module in), IGBT drive module, phase current acquisition module, high-voltage signal acquisition module, resolver module, safety protection module, high-voltage signal acquisition module, insulation resistance detection module, level conversion module, isolation module, inverter, daisy chain communication module, chopper module, resonance module, high-frequency rectifier module, low-pass filter module, EMI filter module, power factor correction module, isolation DCDC module and output rectifier filter module ( Figure 2 Output rectification and filtering in );

[0115] The control module is respectively connected with the wake-up module, the analog input module, the digital input module, the frequency input module, the CAN communication module, the Ethernet communication module, the LIN communication module, the Bluetooth communication module, the high-side drive module, the low-side drive module, the H-bridge drive module, the IGBT drive module, the phase current acquisition module, the high-voltage signal acquisition module, the resolver module, the safety protection module, the high-voltage signal acquisition module, and the insulation resistance detection module;

[0116] The power domain controller integrates seven controllers: vehicle controller, charging control unit, motor controller, main control board of battery management unit, on-board charger controller, DC conversion controller, and vehicle-pile interconnection controller.

[0117] In the power domain controller, the power module is used to reasonably distribute the power of each module in the power domain controller according to the different power inputs of the whole vehicle system, and to control the power supply in the POWERLATCH mode when the key is powered off; the wake-up signal received by the wake-up module is used to activate the corresponding module in the power domain controller based on the wake-up signal.

[0118] In the power domain controller, analog signals related to the power domain controller are collected and processed through the analog input module, and the processed analog signals are sent to the control module; digital signals related to the power domain controller are collected and processed through the digital input module, and the processed digital signals are sent to the control module; frequency signals related to the power domain controller are collected and processed through the frequency input module, and the processed frequency signals are sent to the control module.

[0119] In the power domain controller, the control module performs CAN communication with the vehicle system through the CAN communication module, and the CAN communication module is equipped with a protection circuit; the control module performs Ethernet communication with the vehicle system through the Ethernet communication module; the control module provides communication assistance for CAN communication and Ethernet communication, as well as data refresh and fault diagnosis through the LIN communication module, and the LIN communication module has the protection functions of short circuit to power supply and short circuit to ground; the control module performs Bluetooth communication with the charging pile through the Bluetooth communication module; the control module communicates with the BMS slave board in the battery pack through the daisy chain communication module, and the daisy chain communication module has A and B bidirectional daisy chain communication and reverse wake-up source recognition functions.

[0120] In the power domain controller, the control module uses the high-side driver module to perform wake-up drive output and high-side control output corresponding to the BMS-related PWM; the control module uses the low-side driver module to control fast and slow charging relays, thermal management-related relays, solenoid valves and various indicator lights; the control module uses the H-bridge driver module to control the fast and slow charging locks; the control module controls the inverter through the IGBT driver module; the DC power provided by the battery pack is converted into AC power through the inverter and provided to the motor. The inverter includes a three-phase full-bridge inverter circuit and IGBT.

[0121] The control module includes: a 32-bit high-performance multi-core microcontroller and its minimum circuit, and a 16-bit microcontroller; the multi-core microcontroller is used to realize the functions of the vehicle controller, charging control unit, motor controller, battery management unit main control board, on-board charger controller, DC conversion controller, and vehicle-pile interconnection controller; the 16-bit microcontroller is used to monitor the input of some acquisition ports that have no real-time requirements; the 32-bit high-performance multi-core microcontroller communicates and interacts with the 16-bit microcontroller through SPI.

[0122] In the power domain controller, the control module monitors the vehicle's high-voltage system through the DC bus voltage, charging voltage, and three-phase voltage collected by the high-voltage signal acquisition module; the phase current acquisition module collects the phase current to monitor the vehicle's high-voltage system; the safety protection module prevents circuit overload and short circuit in the power domain controller to protect the safety of the vehicle's electrical system and electrical equipment; the insulation resistance of the on-board rechargeable energy storage system and the positive and negative pole-to-ground voltages are detected through the insulation resistance detection module and transmitted to the control module.

[0123] In the power domain controller, the DC power of the output voltage of the battery pack is converted into DC power of a first voltage through a chopper module; the DC power of the first voltage is processed through a resonant circuit to obtain sinusoidal AC power, and the resonant circuit has electrical isolation and voltage regulation functions; the sinusoidal AC power is rectified through a high-frequency rectifier module to obtain pulsating DC power; the pulsating DC power is filtered through a low-pass filter module to obtain a smooth and stable DC voltage output to power the battery.

[0124] In the power domain controller, the external DC power input from the external power grid is filtered through the EMI filtering module to filter out the interference of the high-frequency pulses of the external power grid on the internal power supply of the electric vehicle, while reducing the electromagnetic radiation to a minimum; the voltage of the filtered external DC power is converted into a stable second voltage through the power factor correction module; the second voltage is boosted through the isolated DCDC module to obtain DC power that meets the voltage level of the battery pack; the voltage output by the isolated DCDC module is filtered through the output rectifier filter module to obtain a stable output voltage to power the battery pack.

[0125] In the power domain controller, the isolation module is used to isolate the high and low voltage side communication and acquisition to achieve isolation between the high and low voltage signals in the power domain controller board; the level conversion module is used to convert the different level signals in the power domain controller board to achieve interaction between the different level signals in the power domain controller board.

[0126] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An electric vehicle power domain controller, characterized in that: include: Power module, wake-up module, analog input module, digital input module, frequency input module, CAN communication module, Ethernet communication module, LIN communication module, Bluetooth communication module, high-side driver module, low-side driver module, H-bridge driver module, control module, IGBT driver module, phase current acquisition module, high-voltage signal acquisition module, resolver module, safety protection module, high-voltage signal acquisition module, insulation resistance detection module, level conversion module, isolation module, inverter, daisy chain communication module, chopper module, resonance module, high-frequency rectifier module, low-pass filter module, EMI filter module, power factor correction module, isolated DCDC module and output rectifier filter module; The control module is respectively connected to the wake-up module, the analog input module, the digital input module, the frequency input module, the CAN communication module, the Ethernet communication module, the LIN communication module, the Bluetooth communication module, the high-side driver module, the low-side driver module, the H-bridge driver module, the IGBT driver module, the phase current acquisition module, the high-voltage signal acquisition module, the resolver module, the safety protection module, the high-voltage signal acquisition module, and the insulation resistance detection module; The power domain controller integrates seven controllers: vehicle controller, charging control unit, motor controller, main control board of battery management unit, on-board charger controller, DC conversion controller, and vehicle-pile interconnection controller.

2. The electric vehicle power domain controller according to claim 1, characterized in that: In the power domain controller, the power module is used to reasonably distribute the power of each module in the power domain controller according to the different power inputs of the whole vehicle system, and to control the power supply in the POWERLATCH mode when the key is powered off; the wake-up signal is received by the wake-up module, and the corresponding module in the power domain controller is activated based on the wake-up signal.

3. The electric vehicle power domain controller according to claim 1, characterized in that: In the power domain controller, Collecting and processing analog signals related to the power domain controller through the analog input module, and sending the processed analog signals to the control module; Collecting and processing digital signals related to the power domain controller through the digital input module, and sending the processed digital signals to the control module; The frequency input module collects and processes the frequency signal related to the power domain controller, and sends the processed frequency signal to the control module.

4. The electric vehicle power domain controller according to claim 1, characterized in that: In the power domain controller, The control module performs CAN communication with the vehicle system through the CAN communication module, and the CAN communication module is provided with a protection circuit; The control module performs Ethernet communication with the vehicle system through the Ethernet communication module; The control module assists the CAN communication and the Ethernet communication through the LIN communication module, and performs data refresh and fault diagnosis. The LIN communication module has the protection function of short circuit to power supply and short circuit to ground; The control module performs Bluetooth communication with the charging pile via the Bluetooth communication module; The daisy chain communication module is used to communicate with the BMS slave board in the battery pack. The daisy chain communication module has A and B bidirectional daisy chain communication and reverse wake-up source identification functions.

5. The electric vehicle power domain controller according to claim 1, characterized in that: In the power domain controller, The control module performs a wake-up drive output and a high-side control output corresponding to the PWM related to the BMS through the high-side drive module; The control module controls fast and slow charging relays, thermal management related relays, solenoid valves and various indicator lights through the low-side driver module; The control module controls the fast and slow charging locks through the H-bridge driving module; The control module controls the inverter through the IGBT drive module; The inverter converts the DC power provided by the battery pack into AC power and provides it to the motor. The inverter includes a three-phase full-bridge inverter circuit and an IGBT.

6. The electric vehicle power domain controller according to claim 1, characterized in that: The control module comprises: A 32-bit high-performance multi-core microcontroller and its minimum circuit, and a 16-bit microcontroller; The multi-core single-chip microcomputer realizes the functions of the vehicle controller, charging control unit, motor controller, main control board of the battery management unit, on-board charger controller, DC conversion controller, and vehicle-pile interconnection controller; The 16-bit single-chip microcomputer is used to monitor the input of some acquisition ports that do not have real-time requirements; The 32-bit high-performance multi-core single-chip microcomputer communicates and interacts with the 16-bit single-chip microcomputer via SPI.

7. The electric vehicle power domain controller according to claim 1, characterized in that: In the power domain controller, The control module monitors the vehicle high voltage system through the DC bus voltage, charging voltage, and three-phase voltage collected by the high voltage signal acquisition module; The control module collects phase currents through the phase current collection module to monitor the vehicle high voltage system; The safety protection module is used to prevent circuit overload and short circuit in the power domain controller, thereby protecting the safety of the vehicle electrical system and electrical equipment; The insulation resistance and the positive and negative pole-to-ground voltages of the vehicle-mounted rechargeable energy storage system are detected by the insulation resistance detection module and transmitted to the control module.

8. The electric vehicle power domain controller according to claim 1, characterized in that: In the power domain controller, Converting the DC power of the output voltage of the battery pack into the DC power of the first voltage by the chopper module; The direct current of the first voltage is processed by the resonant circuit to obtain a sinusoidal alternating current, wherein the resonant circuit has electrical isolation and voltage regulation functions; The high-frequency rectifying module rectifies the sinusoidal alternating current to obtain pulsating direct current; The pulsating direct current is filtered by the low-pass filter module to obtain a smooth and stable direct current voltage output to power the battery.

9. The electric vehicle power domain controller according to claim 1, characterized in that: In the power domain controller, The external DC power input from the external power grid is filtered through the EMI filter module to filter out the interference of the high-frequency pulses of the external power grid on the internal power supply of the electric vehicle, and at the same time reduce the electromagnetic radiation to a minimum; The voltage of the filtered external direct current is converted into a stable second voltage through a power factor correction module; The second voltage is boosted by an isolated DCDC module to obtain a direct current that meets the voltage level of the battery pack; The voltage output by the isolated DCDC module is filtered through the output rectification and filtering module to obtain a stable output voltage to power the battery pack.

10. The electric vehicle power domain controller according to claim 1, characterized in that: In the power domain controller, The isolation module is used to isolate the high and low voltage side communication and acquisition to achieve isolation between the high and low voltage signals in the power domain controller board; The level conversion module is used to convert the different level signals in the power domain controller board to achieve interaction between the different level signals in the power domain controller board.

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