Digital high-voltage pre-charging multifunctional power supply module and vehicle-mounted controller

Abstract

The invention discloses a digital high-voltage pre-charging multifunctional power supply module and a vehicle-mounted controller, and belongs to the technical field of new energy automobiles. The output end of a storage battery serves as a low-voltage side power supply end; the low-voltage side power supply end is respectively connected to the wake-up circuit, the power supply end of the power supply module and the low-voltage side of the DAB double-bridge circuit; the output end of the wake-up circuit is connected with the enabling end of the power module; the high-voltage side of the DAB double-bridge circuit serves as a high-voltage side power supply end, and the high-voltage side power supply end is connected with high-voltage electric equipment and a discharging circuit; the power supply module comprises a driving power supply and a backup power supply, the output end of the driving power supply is connected to the driving end of the DAB double-bridge circuit, and the output end of the backup power supply is connected to the ASC circuit; the output end of the control module is connected with the signal end of the DAB double-bridge circuit and the signal end of the discharging circuit. By integrating the high-voltage pre-charging function, the passive discharging function and the vehicle high-side ASC power supply function, the vehicle high-side ASC power supply has the advantages of being small in size, energy-saving, high in integration level and interactive.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a digital high-voltage pre-charge multifunctional power supply module and an on-board controller. Background Art

[0002] With the rapid development of new energy vehicles and intelligent driving technologies, the demand for electrification, modularization, and intelligence in vehicles is becoming increasingly evident. In vehicle systems, high-voltage electrical equipment typically has energy storage devices at its input ports. Therefore, during system power-up, power cannot be supplied directly to these high-voltage equipment. Otherwise, large inrush currents will flow through the high-voltage lines, causing arcing and sticking in the output cables of devices like contactors. Furthermore, large inrush currents can cause interference and even damage other system components. Therefore, a pre-charging circuit is necessary within these devices.

[0003] High-voltage electrical equipment typically has a passive discharge resistor connected in parallel across the energy storage device to discharge the charge stored in the device after the device loses power. However, when the high-voltage equipment is operating, the discharge resistor remains connected in parallel to the high-voltage energy storage device, constantly consuming energy. Given the current large number of electric vehicles, this energy consumption cannot be ignored.

[0004] As safety requirements for electric vehicles continue to rise, hardware design incorporates a backup power supply into the IGBT driver board. In the event of a serious device failure, the driver IC on the driver board automatically executes the ASC function, enhancing the safety of the electric vehicle. Therefore, the device must include a high-voltage backup power supply, which draws power from the high-voltage side and backs up the ASC circuit.

[0005] In summary, the three functions in the existing equipment are separated from each other, occupying a large volume, having low efficiency and high energy consumption. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a digital high-voltage pre-charge multifunctional power supply module and a vehicle-mounted controller that can integrate the three separate functions proposed in the background technology while reducing the device volume and operating energy consumption.

[0007] To achieve the above object, the present invention is implemented by adopting the following technical solutions: In the first aspect, the present invention provides a digital high-voltage pre-charge multi-functional power supply module, including a low-voltage power supply, a wake-up circuit, a DAB dual-bridge circuit, a control module, a power supply module and a discharge circuit; the output end of the battery is connected to the positive electrode of the diode D100, and the negative electrode of the diode D100 serves as the low-voltage side power supply end; the low-voltage side power supply end is respectively connected to the wake-up circuit and the power supply end of the power module, and the low-voltage side of the DAB dual-bridge circuit; the output end of the wake-up circuit is connected to the enable end of the power module; the high-voltage side of the DAB dual-bridge circuit serves as the high-voltage side power supply end, and the high-voltage side power supply end is connected to the high-voltage electrical equipment and the discharge circuit, and a support capacitor is connected in parallel to the high-voltage electrical equipment; the power supply module includes a driving power supply and a backup power supply, the output end of the driving power supply is connected to the driving end of the DAB dual-bridge circuit, and the output end of the backup power supply is connected to the ASC circuit; the output end of the control module is respectively connected to the signal ends of the DAB dual-bridge circuit and the discharge circuit, for controlling the power transmission direction of the DAB dual-bridge circuit and whether the discharge circuit is working.

[0008] Optionally, the low-voltage power supply is a battery.

[0009] Optionally, the wake-up circuit uses a CAN transceiver, the power supply terminal BAT of the CAN transceiver is connected to the low-voltage side power supply terminal via an LDO step-down module, the inhibition output terminal INH of the CAN transceiver is connected to the enable terminal of the power module, and the signal terminal CANH / CANL of the CAN transceiver is connected to an external CAN bus.

[0010] Optionally, the signal transmitting end TXD and the signal receiving end RXD of the CAN transceiver are also connected to the signal end of the control module respectively.

[0011] Optionally, the DAB dual-bridge circuit includes a low-voltage side full-bridge circuit, a high-voltage side full-bridge circuit, an inductor LS and a high-frequency transformer T1; the magnetic network composed of the inductor LS and the high-frequency transformer T1 connects the AC ports of the low-voltage side full-bridge circuit and the high-voltage side full-bridge circuit; the low-voltage side full-bridge circuit and the high-voltage side full-bridge circuit are also respectively connected to filter capacitors.

[0012] Optionally, the signal end of the low-voltage side full-bridge circuit is connected to the output end of the control module, and the signal end of the high-voltage side full-bridge circuit is connected to the output end of the control module through a signal isolation circuit, and the signal isolation circuit includes an IGBT drive optocoupler and a signal amplification circuit for signal isolation and amplification.

[0013] Optionally, the control module adopts a programmable chip.

[0014] Optionally, the power supply module includes a flyback converter and a DC / DC module; the flyback converter includes a high-frequency transformer T2, one end of the primary side of the high-frequency transformer T2 is connected to the low-voltage side power supply end, and the other end is grounded through the source and drain of the switch tube Q600; the PWM output end VG of the DC / DC module is connected to the gate of the switch tube Q600, and the power supply end VIN and the enable end EN of the DC / DC module are respectively connected to the low-voltage side power supply end and the output end of the wake-up circuit; the secondary side of the high-frequency transformer T2 includes a high-voltage side power supply secondary side and a low-voltage side power supply secondary side corresponding to the driving power supply, and a backup power supply secondary side corresponding to the backup power supply.

[0015] Optionally, the discharge circuit includes an optocoupler, a transistor Q501, a switch tube Q502, a Schottky diode Z501, a resistor R505, a resistor R507 and a resistor chain; the first input end of the optocoupler is connected to the output end of the control module through a signal isolation circuit, and the second input end is grounded; the first output end of the optocoupler is connected to the adaptive power supply, and the second output end is connected to the base of the transistor Q501 through the resistor R507, the collector of the transistor Q501 is connected to the gate of the switch tube Q502, the source of the switch tube Q502 is connected to the high-voltage side power supply end through the resistor chain, and the drain of the switch tube Q502 is grounded; the resistor R505 and the Schottky diode Z501 are respectively connected between the gate of the switch tube Q502 and its source and drain.

[0016] In a second aspect, the present invention provides an on-board controller for a new energy vehicle, comprising the digital high-voltage pre-charge multi-functional power supply module as described above.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a digital high-voltage pre-charge multifunctional power supply module and an on-board controller, which integrates the high-voltage pre-charge function, the passive discharge function and the vehicle high-side ASC power supply function to form a digital high-voltage pre-charge multifunctional power supply module. The pre-charge resistor, pre-charge relay, high-voltage backup power supply and passive discharge resistor in the current on-board controller are eliminated. The multifunctional module of the present application has the advantages of small size, energy saving, high integration, intelligence and interactivity. It solves the pain points of large size, high cost and low mechanical contact life in the on-board pre-charge (charging resistor + relay) solution, while integrating the functions of high-voltage backup power supply and passive discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 1 is a topological diagram of a conventional pre-charging circuit A provided in an embodiment of the present invention; Figure 2 1 is a topological diagram of a conventional pre-charging circuit B provided in an embodiment of the present invention; Figure 3 1 is a topological diagram of a digital high-voltage pre-charge multifunctional power supply module provided in an embodiment of the present invention; Figure 4 1 is a topological diagram of a wake-up circuit provided in an embodiment of the present invention; Figure 5 1 is a topological diagram of a DAB dual-bridge circuit provided by an embodiment of the present invention; Figure 6 is a topological diagram of a power module provided in an embodiment of the present invention; Figure 7 is a topological diagram of a discharge circuit provided by an embodiment of the present invention; Figure 8 This is a flow chart of an operating mode of a digital high-voltage pre-charge multi-functional power supply module provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0020] Example 1:

[0021] like Figure 1 The above is a traditional pre-charge circuit A, which consists of a resistor Rcharge and a switch K2. It is characterized by a simple structure, low cost, high reliability, and only uses a simple RC charging principle. With the trend of integration, its shortcomings are becoming increasingly obvious, such as poor adaptability. Due to the fixed charging time, it cannot be directly used for different needs and requires matching resistors. There is energy loss, and approximately 50% of the energy consumed in the charging process is consumed by the resistor. It is impossible to implement protection: it relies on external fuses and detection methods, and the resistor is easily burned when a short circuit occurs in the subsequent stage.

[0022] like Figure 2 The above-described conventional pre-charge circuit B is different from conventional pre-charge circuit A in that the pre-charge circuit, consisting of resistor Rcharge and switch K2, is replaced by a buck module circuit. When the buck module receives a pre-charge command from the CAN bus, the control chip within the buck module activates, controlling the buck circuit to reduce the voltage. For example, if the bus voltage is 800V, the buck circuit charges the downstream energy storage device (support capacitor) to 780V. A pre-charge completion message is then sent via the CAN bus. Upon receiving this message, the main control unit controls K1 to close, completing the power-on operation. Conventional pre-charge circuit B achieves controllable time, controllable current, high efficiency, and the ability to detect downstream short circuits. However, this device, which features communication and programmable functions, is useless after power-on, resulting in low device utilization.

[0023] like Figure 3 As shown, based on the traditional pre-charging circuit A and the traditional pre-charging circuit B, an embodiment of the present invention provides a digital high-voltage pre-charging multi-functional power supply module, including a low-voltage power supply, a wake-up circuit, a DAB dual-bridge circuit, a control module, a power supply module and a discharge circuit; the output end of the battery is connected to the positive electrode of the diode D100, and the negative electrode of the diode D100 serves as the low-voltage side power supply end POW_LV; the low-voltage side power supply end is respectively connected to the wake-up circuit and the power supply end of the power module, and the low-voltage side of the DAB dual-bridge circuit; the output end of the wake-up circuit is connected to the enable end of the power module; the high-voltage side of the DAB dual-bridge circuit serves as the high-voltage side power supply end POW_HV, and the high-voltage side power supply end is connected to the high-voltage electrical equipment and the discharge circuit, and a support capacitor is connected in parallel on the high-voltage electrical equipment; the power supply module includes a driving power supply and a backup power supply, the output end of the driving power supply is connected to the driving end of the DAB dual-bridge circuit, and the output end of the backup power supply is connected to the ASC circuit; the output end of the control module is respectively connected to the signal ends of the DAB dual-bridge circuit and the discharge circuit, for controlling the power transmission direction of the DAB dual-bridge circuit and whether the discharge circuit is working.

[0024] Specifically in this embodiment, the low-voltage power supply is a battery, such as a low-voltage battery on a vehicle.

[0025] Specifically in this embodiment, Figure 4 As shown in the figure, the wake-up circuit uses a CAN transceiver. The CAN transceiver's power supply terminal BAT is connected to the low-voltage side power supply terminal via an LDO step-down module. The CAN transceiver's inhibit output terminal INH is connected to the enable terminal of the power module. The CAN transceiver's signal terminals CANH / CANL are connected to the external CAN bus. The CAN transceiver's signal transmitting terminal TXD and signal receiving terminal RXD are also connected to the signal terminal of the control module.

[0026] In sleep mode, the CAN transceiver outputs a wake-up signal (enable signal POW_EN) upon receiving a programmed message via the CAN bus. This signal awakens the power module. After powering on the control module, the CAN transceiver is reset to normal mode, allowing data to be sent and received via the CAN transceiver. When the system is not operating, this circuit enters sleep mode to reduce power consumption. Before operation, the CAN transceiver's power supply, BAT, is drawn from the low-voltage side power supply. Because the CAN transceiver is in sleep mode, power consumption is extremely low.

[0027] Specifically in this embodiment, Figure 5As shown, the DAB dual-bridge circuit includes a low-voltage side full-bridge circuit, a high-voltage side full-bridge circuit, an inductor LS and a high-frequency transformer T1; the low-voltage side full-bridge circuit includes two low-voltage side half-bridge structures, specifically including: switch tube S1, switch tube S2, switch tube S3 and switch tube S4; the high-voltage side full-bridge circuit includes two high-voltage side half-bridge structures, specifically including: switch tube S5, switch tube S6, switch tube S7 and switch tube S8; the magnetic network composed of the inductor LS and the high-frequency transformer T1 connects the AC ports of the low-voltage side full-bridge circuit and the high-voltage side full-bridge circuit; the low-voltage side full-bridge circuit and the high-voltage side full-bridge circuit are also connected to filter capacitors C701 and C702 respectively.

[0028] The signal end of the low-voltage side full-bridge circuit is connected to the output end of the control module, and the signal end of the high-voltage side full-bridge circuit is connected to the output end of the control module through a signal isolation circuit. The signal isolation circuit includes an IGBT drive optocoupler and a signal amplification circuit for signal isolation and amplification.

[0029] The control module adjusts the phase difference φ between the output voltage square waves of the low-voltage and high-voltage full-bridge circuits to create a voltage difference across high-frequency transformer T1. This voltage difference drives current through inductor Ls, achieving bidirectional energy transfer. When φ > 0, energy is transferred from the low-voltage side to the high-voltage side; when φ < 0, energy is transferred from the high-voltage side to the low-voltage side. When φ = 0, no energy is transferred. Triple phase shift control (TPS) enables soft switching (ZVS) operation of the switches across the full load range, improving equipment efficiency. The control module also implements dual-loop control by collecting current and voltage signals. Segmented current limiting is used to charge the support capacitors of high-voltage power equipment. For example, charging can be set to 10A before reaching 50% of the target voltage, 5A before reaching 80%, and 2A before reaching the set voltage. This reduces current inrush on the low-voltage battery and prevents output voltage overshoot. When charging is completed, the control module transmits the pre-charge completion message to the control device through the CAN bus. The control device attracts the main relay of the system and sends the status message of the main contactor attraction to this module. At this time, the power-on pre-charge action is completed. When the controllable module receives the main contactor attraction message on the CAN bus, the control module starts to adjust the phase angle of the output drive waveform through PWM, so that the energy transmission is changed from the high-voltage side to the low-voltage side, and controls the output voltage to be slightly higher than the low-voltage battery voltage, so that Figure 3 The diode D100 is in the cut-off state. At this time, the power of the low-voltage battery is no longer needed, and the high-voltage side power supply end replaces the low-voltage battery to supply power to the low-voltage side power supply end.

[0030] During the operation of the DAB dual-bridge circuit, the control module can also collect the current of each bridge arm through resistors (R701, R702, R703, R704), and convert it into a voltage signal through a differential receiving circuit, as well as collect the input and output voltage and current. According to these voltage and current signals, the PWM is adjusted to complete closed-loop control. At the same time, according to these signals, faults such as overcurrent, overvoltage, and output short circuit of the equipment can be detected, and the fault information can be reported to the vehicle controller unit to achieve the purpose of protection and fault diagnosis.

[0031] Specifically, in this embodiment, the control module utilizes a programmable chip with programmable control capabilities. This chip can be a device with programmable logic input and output, such as an ARM, DSP, or FPGA. The programmable chip has CAN communication capabilities and communicates with the system via the CAN bus. It uses PWM to control the DAB dual-bridge circuit to perform pre-charge functions and provide backup power to the high-side ASC functional circuit.

[0032] Specifically in this embodiment, Figure 6 As shown, the power supply module includes a flyback converter and a DC / DC module; the flyback converter includes a high-frequency transformer T2, one end of the primary side of the high-frequency transformer T2 is connected to the low-voltage side power supply end, and the other end is grounded through the source and drain of the switch tube Q600; the PWM output end VG of the DC / DC module is connected to the gate of the switch tube Q600, and the power supply end VIN and the enable end EN of the DC / DC module are respectively connected to the low-voltage side power supply end and the output end of the wake-up circuit; the secondary side of the high-frequency transformer T2 includes a high-voltage side power supply secondary side and a low-voltage side power supply secondary side corresponding to the driving power supply, and a backup power supply secondary side corresponding to the backup power supply.

[0033] The power module generates the various power supplies required by this digital high-voltage pre-charge multifunctional power supply module. For example, the high-voltage output backup power supply P01 powers the ASC circuit; high-side power supplies P02, P03, and P04 power switches S5, S7, S6, and S8, respectively; and low-voltage power supply P05 powers switches S1, S2, S3, and S4. It also serves as feedback voltage for the DC / DC module's voltage feedback terminal FB. This module utilizes a typical flyback converter topology. The control chip used is a power supply chip (DC / DC module) with dual-loop voltage and current control and an enable pin. When U601 (DC / DC module) receives the power enable signal POW-EN from the CAN transceiver, the control chip begins operating, utilizing the low-voltage battery to generate the module's various power supplies. A power supply line also provides backup power to the ASC logic circuit in the controller's inverter unit. This power supply is essential in systems with high safety requirements. The diodes D601-D605, capacitors C601-C605, capacitor C600, resistor R600, and diode D600 in the figure are peripheral circuits and will not be discussed separately. The backup power supply's function is to ensure that, in the event of an extreme fault during control system operation, the IGBT driver chip remains powered and the high-side ASC function is enabled, shorting the motor's three-phase windings, ultimately stopping the motor or reducing the induced EMF.

[0034] Specifically in this embodiment, Figure 7 As shown, the discharge circuit includes an optocoupler, a transistor Q501, a switch Q502, a Schottky diode Z501, a resistor R505, a resistor R507, and a resistor chain. The first input terminal of the optocoupler is connected to the output terminal of the control module through a signal isolation circuit, and the second input terminal is grounded. The first output terminal of the optocoupler is connected to the adapter power supply, and the second output terminal is connected to the base of the transistor Q501 through resistor R507. The collector of the transistor Q501 is connected to the gate of the switch Q502. The source of the switch Q502 is connected to the high-voltage side power supply terminal through the resistor chain, and the drain of the switch Q502 is grounded. The resistor R505 and the Schottky diode Z501 are respectively connected between the gate and the source and drain of the switch Q502. The resistor chain includes resistors R501, R502, R503, and R504 connected in series.

[0035] When power is lost to the device, the charge in the energy storage device of the high-voltage power consumer needs to be discharged through either active or passive discharge. If the control device is damaged and active discharge is impossible, a passive discharge circuit provides a last resort. The traditional approach involves connecting a passive discharge resistor in parallel across the energy storage device. However, this creates a resistor with a loss of approximately 5W, which continuously releases heat and consumes energy from the high-voltage battery. For an electric vehicle, this waste of energy is only a few kilowatt-hours over its lifetime, but as the number of electric vehicles increases, this loss accumulates to a significant amount. To address this issue, a controllable passive discharge circuit is added to this module. When VCC is depleted, the optocoupler is non-conductive, and transistor Q501 is in the off state. If the high-voltage energy storage device is charged, a voltage is generated on the gate of NMOS transistor Q502 due to the resistor chain (R501-R505). This voltage is clamped to approximately 15V by Z501, turning Q502 on. The charge in the high-voltage energy storage device is discharged through the resistor chain. When this module is in operation, the low-voltage power supply turns on the optocoupler, and the 15V voltage on the high-side passes through the optocoupler, turning on transistor Q501. This causes the gate voltage of NMOS transistor Q502 to drop below the turn-on threshold, causing NMOS transistor Q502 to stop conducting. The resistance of Q505 is an order of magnitude larger than the other resistors in the passive discharge resistor chain, significantly reducing the losses when NMOS transistor Q502 is turned off. When the module's operating power supply is not operating, the passive discharge circuit operates normally, discharging the energy storage devices on the system's high-voltage electrical equipment. When the operating power supply starts operating, the passive discharge circuit is interrupted, achieving energy savings.

[0036] In summary, the digital high-voltage pre-charge multifunctional power supply module provided by the embodiment of the present invention uses the electric energy of the low-voltage battery to pre-charge the support capacitor on the high-voltage electrical equipment, so that the voltage of the support capacitor reaches the target voltage value. When the wake-up circuit receives the control instruction, it outputs the wake-up signal to the power module, and the power module supplies power to the control module. The control module controls the DAB dual-bridge circuit through the drive signal so that its power transmission direction is from the low-voltage side power supply end to the high-voltage side power supply end, and uses the electric energy of the low-voltage battery to charge the support capacitor. When the voltage on the support capacitor reaches the target voltage, this module sends a pre-charge completion message to the main control unit through the CAN bus. After the main control unit receives this pre-charge completion message, it controls K1 to be energized, and the power-on action is completed. At this time, the main control unit sends a message to this module that the K1 relay is energized. At this time, the control module controls the DAB dual full-bridge circuit through the PWM signal, and starts to take power from the high-voltage side to the low-voltage side to transmit power.

[0037] The module's low-voltage flyback converter generates an isolated power supply, which is supplied to the high-side IGBT driver in the vehicle inverter, providing backup power for the ASC function. Simultaneously, the module's low-voltage power supply disconnects the passive discharge resistor circuit via an isolating optocoupler system, thereby achieving energy savings. This eliminates the need for a pre-charge relay and resistor in the high-voltage battery, eliminates a high-to-low voltage backup power supply, and disconnects the passive discharge resistor circuit via the low-voltage power supply. This reuse of hardware circuitry enables the module to serve multiple purposes.

[0038] In order to facilitate those skilled in the art to better understand the working process provided by the present disclosure, the module is described below with a complete embodiment.

[0039] In step S80, the programmable chip initializes the internal firmware and reads the parameter settings for the device operation.

[0040] In step S81, the programmable chip starts self-checking the system to see if there is an erroneous feedback signal. If so, it reports the fault and ends the operation.

[0041] In step S82, the program waits for a pre-charge instruction from the control unit.

[0042] In step S84, the program determines whether the system meets the conditions for high-voltage pre-charging. If not, a fault is reported and the operation ends. If the conditions for high-voltage pre-charging are met, the program enters step S85.

[0043] In step S85, the controller charges the device via the DAB full bridge. In this step, the voltage is fed back to control the charging current to ensure the charging time without voltage overshoot.

[0044] In step S86, the controller determines whether the components in the DAB full bridge have overcurrent, short circuit or overheating faults. At the same time, the controller detects the charging voltage fed back to determine whether the high-voltage electrical equipment has a short circuit fault.

[0045] In step S88, if the voltage has not reached the pre-charge set value within the set time, a fault is reported and the operation is exited.

[0046] In step S89, when the charging voltage is reached, the module sends a message indicating that the pre-charging is complete to the CAN bus, and waits for a message indicating whether the main relay is closed.

[0047] In step S811, upon receiving the message indicating that the main contactor is closed, the programmable chip controls the DAB full bridge to enter the backup power supply mode. During this period, it determines whether there is a hardware failure and continues to operate in this mode until a power-off command is received.

[0048] Example 2:

[0049] In a second aspect, the present invention provides an on-board controller for a new energy vehicle, comprising the digital high-voltage pre-charge multi-functional power supply module as described above.

[0050] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0051] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0052] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0053] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A digital high-voltage pre-charge multifunctional power supply module, characterized in that: It includes a low-voltage power supply, a wake-up circuit, a DAB double-bridge circuit, a control module, a power module and a discharge circuit; the output end of the battery is connected to the positive electrode of the diode D100, and the negative electrode of the diode D100 serves as the low-voltage side power supply end; the low-voltage side power supply end is respectively connected to the wake-up circuit and the power supply end of the power module, and the low-voltage side of the DAB double-bridge circuit; the output end of the wake-up circuit is connected to the enable end of the power module; the high-voltage side of the DAB double-bridge circuit serves as the high-voltage side power supply end, and the high-voltage side power supply end is connected to the high-voltage electrical equipment and the discharge circuit, and a support capacitor is connected in parallel to the high-voltage electrical equipment; the power module includes a driving power supply and a backup power supply, the output end of the driving power supply is connected to the driving end of the DAB double-bridge circuit, and the output end of the backup power supply is connected to the ASC circuit; the output end of the control module is respectively connected to the signal ends of the DAB double-bridge circuit and the discharge circuit, for controlling the power transmission direction of the DAB double-bridge circuit and whether the discharge circuit is working.

2. The digital high-voltage pre-charge multifunctional power supply module according to claim 1, characterized in that: The low-voltage power supply adopts a battery.

3. The digital high-voltage pre-charge multifunctional power supply module according to claim 1, characterized in that: The wake-up circuit adopts a CAN transceiver, the power supply terminal BAT of the CAN transceiver is connected to the low-voltage side power supply terminal through an LDO step-down module, the inhibition output terminal INH of the CAN transceiver is connected to the enable terminal of the power module, and the signal terminal CANH / CANL of the CAN transceiver is connected to the external CAN bus.

4. The digital high-voltage pre-charge multifunctional power supply module according to claim 3, characterized in that: The signal transmitting terminal TXD and the signal receiving terminal RXD of the CAN transceiver are also connected to the signal terminal of the control module respectively.

5. The digital high-voltage pre-charge multifunctional power supply module according to claim 1, characterized in that: The DAB dual-bridge circuit includes a low-voltage side full-bridge circuit, a high-voltage side full-bridge circuit, an inductor LS and a high-frequency transformer T1; the magnetic network composed of the inductor LS and the high-frequency transformer T1 connects the AC ports of the low-voltage side full-bridge circuit and the high-voltage side full-bridge circuit; the low-voltage side full-bridge circuit and the high-voltage side full-bridge circuit are also respectively connected to filter capacitors.

6. The digital high-voltage pre-charge multifunctional power supply module according to claim 5, characterized in that: The signal end of the low-voltage side full-bridge circuit is connected to the output end of the control module, and the signal end of the high-voltage side full-bridge circuit is connected to the output end of the control module through a signal isolation circuit. The signal isolation circuit includes an IGBT drive optocoupler and a signal amplification circuit for signal isolation and amplification.

7. The digital high-voltage pre-charge multifunctional power supply module according to claim 1, characterized in that: The control module adopts a programmable chip.

8. The digital high-voltage pre-charge multifunctional power supply module according to claim 1, characterized in that: The power module includes a flyback converter and a DC / DC module; the flyback converter includes a high-frequency transformer T2, one primary end of the high-frequency transformer T2 is connected to the low-voltage side power supply terminal, and the other end is grounded through the source and drain of the switch tube Q600; the PWM output terminal VG of the DC / DC module is connected to the gate of the switch tube Q600, and the power supply terminal VIN and enable terminal EN of the DC / DC module are respectively connected to the low-voltage side power supply terminal and the output terminal of the wake-up circuit; The secondary side of the high-frequency transformer T2 includes a high-voltage side power supply secondary side and a low-voltage side power supply secondary side corresponding to the driving power supply, and a backup power supply secondary side corresponding to the backup power supply.

9. The digital high-voltage pre-charge multifunctional power supply module according to claim 1, characterized in that: The discharge circuit includes an optocoupler, a transistor Q501, a switch tube Q502, a Schottky diode Z501, a resistor R505, a resistor R507 and a resistor chain; the first input end of the optocoupler is connected to the output end of the control module through a signal isolation circuit, and the second input end is grounded; the first output end of the optocoupler is connected to the adaptive power supply, and the second output end is connected to the base of the transistor Q501 through the resistor R507, the collector of the transistor Q501 is connected to the gate of the switch tube Q502, the source of the switch tube Q502 is connected to the high-voltage side power supply end through the resistor chain, and the drain of the switch tube Q502 is grounded; the resistor R505 and the Schottky diode Z501 are respectively connected between the gate and the source and drain of the switch tube Q502.

10. A vehicle-mounted controller for a new energy vehicle, characterized in that: It comprises a digital high-voltage pre-charge multifunctional power supply module as described in any one of claims 1-8.

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