A driving charging and discharging power supply system with a wide range

Abstract

A kind of driving and charging power supply system with a wide range, it includes initialization setting module, control module, drive module and conversion module.The conversion module includes input unit, voltage reduction unit, voltage increase unit and output unit.The input unit is used to provide input voltage.The voltage reduction unit is used to reduce input voltage.The voltage increase unit is used to increase input voltage.The output unit is used to output the voltage reduced by the voltage reduction unit or the voltage increased by the voltage increase unit.The voltage reduction unit includes parallel IGBTQ1 / / IGBTQ2, inductance L1 and IGBTQ5 / / IGBTQ7.The voltage increase unit includes parallel IGBTQ3 / / IGBTQ4 and IGBTQ6 / / IGBTQ8, and the inductance L1 is connected in series between IGBTQ3 / / IGBTQ4 and IGBTQ6 / / IGBTQ8.The four groups of IGBT groups, i.e., switching tubes, in the present power supply system control duty cycle, so that the voltage reduction range and the voltage increase range can be designed very large.

Description

Technical Field

[0001] This utility model relates to the field of speaker driver circuit technology, and in particular to a vehicle charging and discharging power supply system with a large range. Background Technology

[0002] With the widespread adoption of electric vehicles, charging has become a daily necessity. However, electric vehicles cannot always be charged at charging stations. At certain times, such as in the countryside, it may be necessary to charge the electric vehicle using a battery. Different batteries have different output voltages, ranging from 3 volts to 75 volts, thus requiring a power system that adapts the output voltage to the electric vehicle's battery.

[0003] In addition, sometimes electric vehicles need to power some devices, such as mobile phones, refrigerators, or even induction cookers. In this case, the electric vehicle's battery needs to output power to various electrical devices. Since these electrical devices require different voltages, a power system is needed to adapt the battery's output voltage to the voltage of different electrical devices. Summary of the Invention

[0004] In view of this, the present invention provides a vehicle charging and discharging power supply system with a large range, which can adapt the output voltage of different batteries to the batteries of electric vehicles, and can also adapt the output voltage of electric vehicle batteries to different electrical devices.

[0005] A long-range vehicle charging and discharging power supply system includes an initialization setting module, a control module electrically connected to the initialization setting module, a drive module controlled by the control module, and a conversion module driven by the drive module. The conversion module includes an input unit, a buck unit, a boost unit, and an output unit. The input unit provides an input voltage. The buck unit reduces the input voltage. The boost unit increases the input voltage. The output unit outputs either the voltage reduced by the buck unit or the voltage increased by the boost unit. The buck unit includes IGBTs Q1 and Q2 connected in parallel, an inductor L1 connected in series with IGBTs Q1 and Q2, and IGBTs Q5 and Q7 connected in series with inductor L1, wherein the IGBTs Q5 and Q7 are connected in parallel. The boost unit includes IGBT Q3 / / IGBT Q4 connected in parallel, and an IGBT Q6 / / IGBT Q8, which are also connected in parallel. The voltage inductor L1 is connected in series between the IGBT Q3 / / IGBT Q4 and the IGBT Q6 / / IGBT Q8.

[0006] Furthermore, the initialization setting module is used to receive user instructions, which are either boost instructions or buck instructions.

[0007] Furthermore, the initialization device module includes a microprocessor.

[0008] Furthermore, the control module controls the operation of the drive module according to the user instructions.

[0009] Furthermore, the control module includes a microcontroller.

[0010] Furthermore, the input unit is electrically connected to an input power source, and the input power source provides the input voltage.

[0011] Furthermore, the input power source is a storage battery or a car battery.

[0012] Furthermore, in IGBT Q1, the gate G is connected to the drive signal terminal, the collector D is connected to the input terminal, and the emitter S is connected to the inductor L1. In IGBT Q2, the gate G is connected to the drive signal terminal, the collector D is connected to the input terminal, and the emitter S is connected to the inductor L1. In IGBT Q5, the gate G is connected to the drive signal terminal, the collector D is connected to the output terminal, and the emitter S is connected to the inductor L1. In IGBT Q7, the gate G is connected to the drive signal terminal, the collector D is connected to the output terminal, and the emitter S is connected to the inductor L1.

[0013] Furthermore, the gate G of IGBT Q3 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded. The gate G of IGBT Q4 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded. The gate G of IGBT Q6 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded. The gate G of IGBT Q8 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded.

[0014] Compared with existing technologies, the vehicle charging and discharging power supply system provided by this utility model, by setting up the buck unit and the boost unit, and driven by the drive module, activates the boost unit when boosting is needed and the buck unit when bucking is needed. The buck and boost units are each controlled by four sets of IGBTs (interconnected transistors) connected in series, allowing for a wide range of buck and boost voltages. For example, the input voltage can be set from 12V to 75V, and the output voltage from 3V to 75V. Furthermore, because the input and output units have electrolytic capacitors and ceramic capacitors respectively, low-frequency and high-frequency resonant voltages can be filtered out, resulting in a smooth and stable output voltage. Attached Figure Description

[0015] Figure 1 The present invention provides a circuit diagram of a vehicle charging and discharging power supply system with a large range.

[0016] Figure 2 for Figure 1 A schematic diagram of the control module of a high-range vehicle charging and discharging power supply system.

[0017] Figure 3 for Figure 1 A schematic diagram of the drive module of a high-range vehicle charging and discharging power supply system.

[0018] Figure 4 for Figure 1 A schematic diagram of the conversion circuit of a high-range vehicle charging and discharging power supply system. Detailed Implementation

[0019] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0020] like Figure 1 The diagram shown is a circuit schematic of a long-range vehicle charging and discharging power supply system provided by this utility model. The long-range vehicle charging and discharging power supply system includes an initialization setting module 10, a control module 20 electrically connected to the initialization setting module 10, a drive module 30 controlled by the control module 20, and a conversion module 40 driven by the drive module 30. It is understood that the vehicle charging and discharging power supply system also includes other functional modules, such as a protection circuit unit, a heat dissipation unit, and a display module, which are technologies well known to those skilled in the art and will not be described in detail here.

[0021] The initialization setting module 10 is used to receive user commands. For example, when a storage battery is used to charge a car battery, the initialization setting module 10 switches the car battery to charging mode, and the input voltage of the car battery is the charging voltage. Similarly, when the electric vehicle supplies power to an electrical device, the initialization setting module 10 sets the output voltage of the car battery to the input voltage of the electrical device, such as 220 volts, which can power a rice cooker. The control commands of the initialization setting module 10 are executed by a microprocessor. Its computer program and program settings should be existing technology; that is, anyone understanding the concept of this invention can develop the corresponding program. The microprocessor can share a hardware chip with the drive module 30.

[0022] like Figure 2As shown, the control module 20 can be a microcontroller. Since the vehicle charging and discharging power supply system also includes other functional modules, such as a display screen, alarm unit, switch unit, mode selection, etc., the microcontroller is needed to coordinate the operation of these various functional modules. In this invention, the control module 20 is used to edit the instructions from the initialization setting module 10 into program instructions and transmit them to the drive module 30 so that the drive module 30 can drive the conversion unit 40 to operate.

[0023] As mentioned above, such as Figure 3 As shown, the drive module 30 is also a microprocessor. Similarly, the drive module 30 is executed by a computer program. When the drive module 30 receives program instructions from the control module 20, it will output instructions to control the conversion unit 40 to work, such as PWM switching signals. Therefore, it will be described in detail below in conjunction with the conversion unit 40.

[0024] like Figure 4 As shown, the conversion module 40 is a pure circuit composed of various electronic components, such as capacitors, inductors, resistors, etc. The conversion module 40 includes an input unit 41, a buck unit 42, a boost unit 43, and an output unit 44.

[0025] The input unit 41 can be connected to a storage battery or an electric vehicle battery. Specifically, when charging the electric vehicle battery, the input unit 41 is connected to the storage battery; when providing power to an external device, the input unit 41 is connected to the external device. The input unit 41 includes two sets of parallel capacitor banks. One set, located above the circuit board, has three parallel electrolytic capacitors C1 to C3. The other set, located below the circuit board, includes eight parallel ceramic capacitors C9 to C16. It is conceivable that placing electronic components above and below the circuit board saves space, reduces the overall size of the charging and discharging power supply system, and is suitable for vehicle use. The electrolytic capacitors are used for low-frequency filtering and energy storage, while the ceramic capacitors are used for high-frequency resonant filtering. The input terminal VIN of the input unit 41 is electrically connected to one end of the electrolytic capacitor, and the other end of the electrolytic capacitor is electrically connected to one end of the ceramic capacitor. The other end Q3-D of the ceramic capacitor is electrically connected to the step-down unit 42.

[0026] The step-down unit 42 can be a BUCK circuit, comprising two IGBTs Q1 / / IGBTQ2 connected in parallel, an inductor L1 connected in series with IGBTs Q1 / / IGBTQ2, and IGBTs Q5 / / IGBTQ7 connected in series with inductor L1. IGBTs Q5 / / IGBTQ7 are also connected in parallel. Specifically, the gate G of IGBT Q1 is connected to the drive signal terminal, the collector D is connected to the input terminal, and the emitter S is connected to the inductor L1. The gate G of IGBT Q2 is connected to the drive signal terminal, the collector D is connected to the input terminal, and the emitter S is connected to the inductor L1. The gate G of IGBT Q5 is connected to the drive signal terminal, the collector D is connected to the output terminal, and the emitter S is connected to the inductor L1. The gate G of IGBT Q7 is connected to the drive signal terminal, the collector D is connected to the output terminal, and the emitter S is connected to the inductor L1.

[0027] The boost unit 43 can be a BOOST circuit, a switching DC-DC boost circuit that allows the output voltage to be higher than the input voltage. The boost unit 43 includes two parallel IGBTQ3 / / IGBTQ4, an inductor L1 connected in series with the IGBTQ3 / / IGBTQ4, and an IGBTQ6 / / IGBTQ8 connected in series with the IGBTQ1. The IGBTQ6 / / IGBTQ8 are also connected in parallel. The gate G of the IGBTQ3 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded. The gate G of the IGBTQ4 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded. The gate G of the IGBTQ6 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded. The gate G of the IGBTQ8 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded.

[0028] Since the buck unit 42 and the boost unit 43 share an inductor L1, their operating principles will be explained together here. The working principle of the BUCK circuit is a prior art technology; it is a buck-type DC-DC converter circuit that achieves voltage conversion through the periodic switching of IGBT Q1 / / IGBT Q2 and IGBT Q5 / / IGBT Q7. Its core structure consists of switching transistors, inductors, and filter capacitors, utilizing the energy storage and release principle of the inductor to achieve the buck function. The working process is divided into two stages: conduction (power supply and energy storage) and turn-off (inductor energy release). In steady-state operation, it follows the volt-second balance law, and the output voltage is determined by the duty cycle of the switching transistors. IGBT Q1 and IGBT Q2 are connected in parallel. When a voltage reduction is required, the initialization setting module 10 sets the output voltage, such as 6 volts. Then, the drive module 30 controls the complementary duty cycle of IGBT Q1 / / IGBT Q2 to be fixed at ON, while IGBT Q3 / / IGBT Q4 is OFF. At this time, IGBT Q5 / / IGBT Q7 is fixed at ON, and IGBT Q6 / / IGBT Q8 is fixed at OFF. The voltage is then reduced through the energy storage and release of the inductor L1.

[0029] The BOOST circuit itself is also a prior art technology. When IGBT Q1 / / IGBT Q2 is off, IGBT Q3 / / IGBT Q4 will be on, while IGBT Q5 / / IGBT Q7 is off and IGBT Q6 / / IGBT Q8 is on. This forms a boost circuit. The input is connected to a car battery, and the output is connected to an external electrical device, supplying power to that device. The boost principle is that when the switches of IGBT Q5 / / IGBT Q7 and IGBT Q6 / / IGBT Q8 enable boost mode, they operate in a complementary manner. In this case, IGBT Q1 / / IGBT Q2 is fixed to OFF, IGBT Q3 / / IGBT Q4 is fixed to ON, IGBT Q5 / / IGBT Q7 is fixed to OFF, and IGBT Q6 / / IGBT Q8 is fixed to ON.

[0030] The output unit 44 also includes two sets of capacitor banks. One set of capacitor banks consists of multiple ceramic capacitors connected in parallel and electrically connected to the step-down unit 42 and the step-up unit 43. The other set of capacitor banks consists of multiple electrolytic capacitors connected in parallel and connected in series with multiple parallel ceramic capacitors.

[0031] Compared with existing technologies, the vehicle charging and discharging power supply system provided by this utility model, by setting up the buck unit 42 and the boost unit 43, and driven by the drive module 30, allows the boost unit 43 to start working when voltage boost is needed, and the buck unit 42 to work when voltage buck is needed. The buck unit 42 and the boost unit 43 are each controlled by four sets of IGBTs (interconnected transistors) in series to control their duty cycles, thus allowing for a wide buck and boost range. For example, the input voltage can be set from 12V to 75V, and the output voltage can be set from 3V to 75V. Furthermore, since the input unit 41 and the output unit 44 have electrolytic capacitors and ceramic capacitors respectively, low-frequency voltages and high-frequency resonant voltages can be filtered out, resulting in a smooth and stable output voltage.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A long-range vehicle charging and discharging power supply system, characterized in that: The long-range vehicle charging and discharging power supply system includes an initialization setting module, a control module electrically connected to the initialization setting module, a drive module controlled by the control module, and a conversion module driven by the drive module. The conversion module includes an input unit, a buck unit, a boost unit, and an output unit. The input unit provides an input voltage, the buck unit reduces the input voltage, the boost unit increases the input voltage, and the output unit outputs either the voltage reduced by the buck unit or the voltage increased by the boost unit. The step-down unit includes IGBTs Q1 and Q2 connected in parallel, an inductor L1 connected in series with IGBTs Q1 and Q2, and IGBTs Q5 and Q7 connected in series with inductor L1. The IGBTs Q5 and Q7 are connected in parallel. The boost unit includes IGBTs Q3 and Q4 connected in parallel, and an IGBT Q6 and Q8 connected in parallel. The IGBTs Q6 and Q8 are also connected in parallel. The voltage inductor L1 is connected in series between the IGBTs Q3 and Q4 and the IGBTs Q6 and Q8.

2. The long-range vehicle charging and discharging power supply system as described in claim 1, characterized in that: The initialization setting module is used to receive user commands, which can be either boost or buck commands.

3. The long-range vehicle charging and discharging power supply system as described in claim 2, characterized in that: The initialization settings module includes a microprocessor.

4. The long-range vehicle charging and discharging power supply system as described in claim 2, characterized in that: The control module controls the drive module to work according to the user instructions.

5. The long-range vehicle charging and discharging power supply system as described in claim 4, characterized in that: The control module includes a microcontroller.

6. The long-range vehicle charging and discharging power supply system as described in claim 1, characterized in that: The input unit is electrically connected to an input power source, which provides the input voltage.

7. The long-range vehicle charging and discharging power supply system as described in claim 1, characterized in that: The input unit is a storage battery or a car battery.

8. The long-range vehicle charging and discharging power supply system as described in claim 1, characterized in that: The gate G of IGBT Q1 is connected to the drive signal terminal, the collector D is connected to the input terminal, and the emitter S is connected to the inductor L1. The gate G of IGBT Q2 is connected to the drive signal terminal, the collector D is connected to the input terminal, and the emitter S is connected to the inductor L1. The gate G of IGBT Q5 is connected to the drive signal terminal, the collector D is connected to the output terminal, and the emitter S is connected to the inductor L1. The gate G of IGBT Q7 is connected to the drive signal terminal, the collector D is connected to the output terminal, and the emitter S is connected to the inductor L1.

9. The long-range vehicle charging and discharging power supply system as described in claim 1, characterized in that: The gate G of IGBT Q3 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded. The gate G of IGBT Q4 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded. The gate G of IGBT Q6 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded. The gate G of IGBT Q8 is connected to the drive signal terminal, the collector D is connected to the inductor L1, and the emitter S is grounded.

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