Novel vehicle-mounted high-voltage power distribution unit driving circuit

Abstract

The utility model discloses a novel vehicle-mounted high-voltage power distribution unit driving circuit, which comprises a power battery, an air conditioner, a heater 1, a heater 2 and an MCU (Microprogrammed Control Unit) micro-processing controller, mOS tubes are electrically connected in parallel between the air conditioner compressor, the heater 1 and the power battery voltage ground and between the heater 2 and the power battery voltage ground, the source electrodes of the MOS tubes are electrically connected with the battery voltage ground, resistors are connected in parallel between the grid electrodes of the MOS tubes and the battery voltage ground, and the MCU micro-processing controller is electrically connected with the grid electrodes of the MOS tubes in a control mode. The power semiconductor is adopted for driving control, driving control is simple, driving power consumption is small, and occupied space is small.

Description

Technical Field

[0001] The utility model relates to a high-voltage power distribution unit, in particular to a novel vehicle-mounted high-voltage power distribution unit drive circuit used in a high-voltage power distribution system of a new energy vehicle. Background Art

[0002] The on-board high-voltage power distribution unit (PDU) is a core component in the high-voltage power distribution system of new energy vehicles, used to manage and distribute high-voltage power. The PDU connects high-voltage components together through busbars and wiring harnesses, and provides functions such as charge and discharge control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, and low-voltage control for the high-voltage system of new energy vehicles to ensure the safe operation and monitoring of the high-voltage system. The output voltage sampling circuit drive control commonly used in existing on-board high-voltage power distribution units (PDUs) uses the opening and closing of relays to determine its operation and shutdown, as shown in Figure 2 As shown: the vehicle power battery 400V (10) supplies power to the air conditioner 20, heater 1 (30), and heater 2 (40), and their operation and shutdown are determined by the opening and closing of relays S1, S2, and S3 (model: EVR50CI-12V). However, such a drive control circuit has the defects of high drive power consumption and large space size.

[0003] The authorized patent number ZL 202322028368.6, which was announced on February 6, 2024, discloses a high-voltage power distribution unit on a new energy vehicle, which relates to the field of new energy vehicle technology, including a PCB board, on which copper bars TP1, TP2, and TP3 are arranged. The PCB board is electrically connected with air conditioning components, DCDC components, PTC components, defrost components, three-in-one contactors, main pre-charge contactors, oil pump components, and air pump components based on copper bars TP1, TP2, and TP3. The high-voltage power distribution unit on the new energy vehicle has fewer PDU wires, is simple to install, and is not prone to errors; the PCB design cycle is short, and the corresponding time is short for different models of power distribution requirements, and it can be quickly batched; the power distribution current is mainly connected to the relay, insurance, and distribution socket through the copper bar, not through the PCB, to avoid the disadvantage that the PCB copper is easily burned by short-circuit current; the sampling signal is reduced by a voltage divider resistor, and becomes a low-voltage signal when connected to the HVB board, which is safe and reliable. However, this technical solution also has the defects of high driving power consumption and large space size. Utility Model Content

[0004] The utility model provides a novel on-board high-voltage power distribution unit drive circuit with simple drive control, low drive power consumption and small space occupation in order to solve the problems of existing on-board high-voltage power distribution units (PDUs) such as large drive power consumption and large occupied space.

[0005] The specific technical solution adopted by the utility model to solve the above technical problems is: a new type of vehicle-mounted high-voltage power distribution unit drive circuit, including a power battery, an air conditioner, a heater 1 and a heater 2, the power battery voltage is respectively used to power the air conditioner compressor, the heater 1 and the heater 2, and the characteristics are: it also includes an MCU microprocessor controller, MOS tubes are respectively connected in parallel between the air conditioner compressor, the heater 1 and the heater 2 and the power battery voltage ground, and the source of the MOS tube is electrically connected to the battery voltage ground, and the gate of the MOS tube is connected to the battery voltage ground in parallel with a resistor, and the MCU microprocessor controller is respectively electrically connected to the gate control of each MOS tube. Power semiconductors are used for drive control, the drive control is simple, the drive power consumption is small, the space occupied is small, and the circuit cost is low.

[0006] Preferably, the heating power supply control terminal of the air conditioner compressor is electrically connected to the drain of the 5th MOS tube, the source of the 5th MOS tube is electrically connected to the battery voltage ground, the gate of the 5th MOS tube is electrically connected to the control terminal of the MCU microprocessor controller, and the 31st resistor is connected in parallel between the gate of the 5th MOS tube and the battery voltage ground; the heating power supply control terminal of the heater 1 is electrically connected to the drain of the 6th MOS tube, the source of the 6th MOS tube is electrically connected to the battery voltage ground, the gate of the 6th MOS tube is electrically connected to the control terminal of the MCU microprocessor controller, and the 32nd resistor is connected in parallel between the gate of the 6th MOS tube and the battery voltage ground; the heating power supply control terminal of the heater 2 is electrically connected to the drain of the 7th MOS tube, the source of the 7th MOS tube is electrically connected to the battery voltage ground, the gate of the 7th MOS tube is electrically connected to the control terminal of the MCU microprocessor controller, and the 33rd resistor is connected in parallel between the gate of the 7th MOS tube and the battery voltage ground. The use of power semiconductors for drive control has simple drive control, low drive power consumption, and small space occupation.

[0007] Preferably, the MCU microprocessor controller adopts a chip model of GD32F303VGT7. Power semiconductors are used for drive control, which is simple in drive control, low in drive power consumption, and small in space occupation.

[0008] Preferably, the MOS tube is of model OSG65R028HF. The drive control is carried out by using power semiconductors, which is simple in drive control, has low drive power consumption and small space occupation.

[0009] The utility model has the beneficial effects of: using power semiconductors for drive control, simple drive control, low drive power consumption, small occupied space, and low circuit cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The utility model is a structural schematic diagram of a novel vehicle-mounted high-voltage power distribution unit drive circuit.

[0011] Figure 2It is a structural schematic diagram of a vehicle-mounted high-voltage power distribution unit in the prior art. DETAILED DESCRIPTION

[0012] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0013] Figure 1 In the embodiment shown, a novel vehicle-mounted high-voltage power distribution unit drive circuit includes a power battery 10, an air conditioner 20, heaters 1-30 and heaters 2-40. The power battery voltage is used to power the air conditioner compressor, heater 1 and heater 2 respectively, and also includes an MCU microprocessor controller. MOS tubes are electrically connected in parallel between the air conditioner compressor, heater 1 and heater 2 and the power battery voltage ground, and the source of the MOS tube is electrically connected to the battery voltage ground. Resistors are connected in parallel between the gate of the MOS tube and the battery voltage ground, and the MCU microprocessor controller is electrically connected to the gate control of each MOS tube respectively.

[0014] Specifically, the heating power supply control terminal of the air conditioner 20 compressor is electrically connected to the drain of the 5th MOS tube Q5, the source of the 5th MOS tube Q5 is electrically connected to the battery voltage ground, the gate of the 5th MOS tube Q5 is electrically connected to the control terminal of the MCU microprocessor controller, and the 31st resistor R31 is connected in parallel between the gate of the 5th MOS tube and the battery voltage ground; the heating power supply control terminal of the heater 1-30 is electrically connected to the drain of the 6th MOS tube Q6, the source of the 6th MOS tube Q6 is electrically connected to the battery voltage ground, the gate of the 6th MOS tube Q6 is electrically connected to the control terminal of the MCU microprocessor controller, and the 32nd resistor 32 is connected in parallel between the gate of the 6th MOS tube and the battery voltage ground; the heating power supply control terminal of the heater 2-40 is electrically connected to the drain of the 7th MOS tube Q7, the source of the 7th MOS tube is electrically connected to the battery voltage ground, the gate of the 7th MOS tube Q7 is electrically connected to the control terminal of the MCU microprocessor controller, and the 33rd resistor 33 is connected in parallel between the gate of the 7th MOS tube Q7 and the battery voltage ground. The chip model of the MCU microprocessor controller is GD32F303VGT7. The MOS tube model is OSG65R028HF. The 32nd, 33rd and 34th functional pins of the GD32F303VGT7 chip are used for the GDS pin electrical control connection of the MOS tube, and the 31st resistor R31, the 32nd resistor R32 and the 31st resistor R33 are 20K, 00625W resistors.

[0015] The working principle is as follows: The power battery voltage of 400V supplies power to the air-conditioning compressor, heater 1 and heater 2 respectively. The power supply on and off is determined by the microprocessor controlling the on and off of the 5th MOS tube Q5, the 6th MOS tube Q6 and the 7th MOS tube Q7. When the whole vehicle needs the air conditioner and heater 1 and heater 2 to work, the MCU sends a high level to turn on the 5th MOS tube Q5, the 6th MOS tube Q6 and the 7th MOS tube Q7. When the whole vehicle does not need the air conditioner and heater 1 and heater 2 to work, the MCU sends a low level (0 level) to turn off the 5th MOS tube Q5, the 6th MOS tube Q6 and the 7th MOS tube Q7.

[0016] The above content and structure describe the basic principle, main features and advantages of the utility model product, which should be understood by technicians in this industry. The above examples and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which are within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A novel vehicle-mounted high-voltage power distribution unit drive circuit, including a power battery, an air conditioner, a heater 1 and a heater 2, wherein the power battery voltage is respectively connected to the air conditioner compressor, the heater 1 and the heater 2 for power supply, characterized in that: It also includes an MCU microprocessor controller. MOS tubes are electrically connected in parallel between the air-conditioning compressor, heater 1 and heater 2 and the power battery voltage ground, and the source of the MOS tube is electrically connected to the battery voltage ground. Resistors are connected in parallel between the gate of the MOS tube and the battery voltage ground. The MCU microprocessor controller is electrically controlled and connected to the gate of each MOS tube.

2. The novel vehicle-mounted high-voltage power distribution unit drive circuit according to claim 1 is characterized in that: The heating power supply control terminal of the air conditioner compressor is electrically connected to the drain of the 5th MOS tube, the source of the 5th MOS tube is electrically connected to the battery voltage ground, the gate of the 5th MOS tube is electrically connected to the control terminal of the MCU microprocessor controller, and the 31st resistor is connected in parallel between the gate of the 5th MOS tube and the battery voltage ground; the heating power supply control terminal of the heater 1 is electrically connected to the drain of the 6th MOS tube, the source of the 6th MOS tube is electrically connected to the battery voltage ground, the gate of the 6th MOS tube is electrically connected to the control terminal of the MCU microprocessor controller, and the 32nd resistor is connected in parallel between the gate of the 6th MOS tube and the battery voltage ground; the heating power supply control terminal of the heater 2 is electrically connected to the drain of the 7th MOS tube, the source of the 7th MOS tube is electrically connected to the battery voltage ground, the gate of the 7th MOS tube is electrically connected to the control terminal of the MCU microprocessor controller, and the 33rd resistor is connected in parallel between the gate of the 7th MOS tube and the battery voltage ground.

3. The novel vehicle-mounted high-voltage power distribution unit drive circuit according to claim 1 is characterized in that: The MCU microprocessor controller adopts a chip model of GD32F303VGT7.

4. The novel vehicle-mounted high-voltage power distribution unit drive circuit according to claim 1 is characterized in that: The MOS tube adopts model OSG65R028HF.

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