Dual-power-supply starting system and method for hybrid electric vehicle, vehicle and storage medium

Abstract

The invention discloses a dual-power-supply starting system and method for a hybrid electric vehicle, a vehicle and a storage medium. A 12V low-voltage storage battery is connected with a bidirectional DCDC converter; the bidirectional DCDC converter is connected with the controller; the controller is respectively connected with the high-voltage generator and the high-voltage power battery; the high-voltage generator is connected with the engine; when the high-voltage power battery cannot provide high voltage for the high-voltage generator to start the engine, the controller controls the 12V low-voltage storage battery and the bidirectional DCDC converter; 12V low voltage is converted into high voltage through the bidirectional DCDC converter to supply power to the high-voltage generator; when the electric quantity of the 12V low-voltage storage battery is insufficient, the 12V low-voltage storage battery can be supplied with power in a manual power connection mode, and then 12V low voltage is converted into high voltage through the bidirectional DCDC converter to supply power to the high-voltage generator. According to the system, the application cost of the hybrid electric vehicle can be reduced, meanwhile, stable operation of a high-voltage power supply starting mode is guaranteed, and the vehicle use scene is wider.

Description

Technical Field

[0001] The present invention belongs to the technical field of power supply for hybrid electric vehicles, and in particular relates to a dual power supply starting system, method, vehicle and storage medium for a hybrid electric vehicle. Background Art

[0002] In the prior art, there are two common ways to start the engine: Figure 1 As shown, a 12V low-voltage battery is used to power a low-voltage starter motor, which drives the engine to start. Because an independent low-voltage 12V starter motor needs to be set up, this method increases the application cost of new energy hybrid vehicles. Another method is as follows Figure 2 As shown, the new energy hybrid vehicle does not have a dedicated starter motor, and relies on the high-voltage power battery to supply power to the high-voltage generator to start the engine; however, this method can only start the engine when the vehicle is high voltage and the high-voltage power battery can supply power to the generator. If the power battery cannot supply power to the drive motor, for example: the vehicle power battery cannot be supplied with high voltage due to a malfunction, the power battery SOC is zero, etc. and cannot be discharged, the vehicle will not be able to start, and at this time the vehicle cannot be started by jumping on a 12V low-voltage battery, and the vehicle can only be towed for repair, causing great inconvenience to the owner.

[0003] A new power supply and starting system for a hybrid electric vehicle is needed to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide a dual power supply starting system for a hybrid electric vehicle, which is used to solve the technical problems of high application cost and unstable high voltage power supply starting mode of hybrid electric vehicles in the prior art.

[0005] The present invention also aims to provide a dual power supply starting method for a hybrid electric vehicle.

[0006] Another object of the present invention is to provide a vehicle.

[0007] The present invention also aims to provide a computer readable storage medium. The technical solution of the present invention to solve the technical problem is: A dual power supply starting system for a hybrid electric vehicle, comprising: The 12V low-voltage battery converts the 12V low voltage into high voltage through a bidirectional DCDC converter to power the high-voltage generator; Bidirectional DCDC converter converts 12V low voltage into high voltage; converts the high voltage of high-voltage power battery into 12V low voltage; High-voltage power battery, providing high voltage for the high-voltage generator; The high-voltage generator receives high-voltage power supply and starts the engine by starting itself; The engine starts itself through the high-voltage generator to provide power for the vehicle; The controller controls the start and stop of the high-voltage generator and the direction of the received high-voltage power supply; The 12V low-voltage battery is connected to a bidirectional DCDC converter; the bidirectional DCDC converter is connected to a controller; the controller is respectively connected to a high-voltage generator and a high-voltage power battery; the high-voltage generator is connected to an engine.

[0008] Preferably, the 12V low-voltage battery is connected to the bidirectional DCDC converter through a low-voltage wiring harness; the bidirectional DCDC converter is connected to the controller through a high-voltage wiring harness; and the controller is respectively connected to the high-voltage generator and the high-voltage power battery through high-voltage wiring harnesses.

[0009] Preferably, the high-voltage power battery further includes: converting the high voltage into a 12V low voltage through a bidirectional DCDC converter to power the vehicle-mounted low-voltage system.

[0010] A dual power supply starting method using a dual power supply starting system of a hybrid vehicle comprises the following steps: S1: The controller reads the state of the high-voltage power battery and determines whether the high-voltage power battery is in a power supply condition. If so, the high-voltage power battery receives the power supply instruction issued by the controller and executes the power supply instruction to supply power to the high-voltage generator; if not, execute step S2; S2: The controller reads the battery status of the 12V low-voltage battery and determines whether the 12V low-voltage battery is ready for power supply. If so, the 12V low-voltage battery receives the power supply instruction from the controller and executes the power supply instruction. The 12V low voltage is converted into high voltage through a bidirectional DCDC converter to power the high-voltage generator. If not, the 12V low-voltage battery is powered by artificial jumpering and step S2 is executed.

[0011] Preferably, it also includes: S3: During the driving process of the vehicle, the controller reads the power supply status of the low-voltage system of the vehicle and determines whether the power supply of the low-voltage system is stable. If so, the current status is maintained and step S3 is executed again after a set time; if not, step S4 is executed; S4: The controller controls the high voltage power supply of the high voltage power supply battery to flow into the bidirectional DCDC converter, and converts the high voltage into a 12V low voltage through the bidirectional DCDC converter to power the vehicle-mounted low voltage system.

[0012] A vehicle adopts a dual power supply starting system of a hybrid electric vehicle.

[0013] A computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the device where the computer-readable storage medium is located executes a dual-power supply starting method for a hybrid electric vehicle.

[0014] The beneficial effects of the present invention are as follows: by setting a 12V low-voltage battery and a bidirectional DCDC converter, the 12V low-voltage battery is connected to the bidirectional DCDC converter; the bidirectional DCDC converter is connected to the controller; the controller is respectively connected to the high-voltage generator and the high-voltage power battery; the high-voltage generator is connected to the engine; when the high-voltage power battery cannot provide high voltage for the high-voltage generator to start the engine, the controller controls the 12V low-voltage battery and the bidirectional DCDC converter; the 12V low voltage is converted into high voltage through the bidirectional DCDC converter to supply power to the high-voltage generator; when the 12V low-voltage battery is insufficient in power, the 12V low-voltage battery can also be powered by artificial jumpering, and then the 12V low voltage is converted into high voltage through the bidirectional DCDC converter to supply power to the high-voltage generator. The system can reduce the application cost of hybrid vehicles while ensuring the stability of the high-voltage power supply starting method, making the vehicle use scenario more extensive and improving user experience and satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of a hybrid vehicle using an independent low-voltage starter motor power supply starting system in the prior art; Figure 2 It is a schematic diagram of the structure of a hybrid vehicle using a high-voltage power battery powered starting system in the prior art; Figure 3 It is a structural schematic diagram of a dual power supply starting system of a hybrid vehicle of the present invention; Figure 4 is a flow chart of a dual power supply starting method for a hybrid electric vehicle of the present invention; DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0017] Embodiment 1: like Figure 3 As shown, the present invention discloses a dual power supply starting system for a hybrid electric vehicle, comprising: The 12V low-voltage battery converts the 12V low voltage into high voltage through a bidirectional DCDC converter to power the high-voltage generator; Bidirectional DCDC converter converts 12V low voltage into high voltage; converts the high voltage of high-voltage power battery into 12V low voltage; The high-voltage power battery provides high voltage for the high-voltage generator; the high voltage is converted into 12V low voltage through a bidirectional DCDC converter to power the on-board low-voltage system.

[0018] The high-voltage generator receives high-voltage power supply and starts the engine by starting itself; The engine starts itself through the high-voltage generator to provide power for the vehicle; The controller controls the start and stop of the high-voltage generator and the direction of the received high-voltage power supply; The 12V low-voltage battery is connected to the bidirectional DCDC converter through a low-voltage wiring harness; the bidirectional DCDC converter is connected to the controller through a high-voltage wiring harness; and the controller is respectively connected to the high-voltage generator and the high-voltage power battery through high-voltage wiring harnesses.

[0019] In actual application, the dual power supply starting system can achieve the following functions: 1. Under normal circumstances, according to the vehicle control strategy, the controller can use bidirectional DCDC to convert the low voltage 12V of the electric vehicle into high voltage to power the high voltage generator to start the engine; or after the vehicle is high voltage, the controller can use the high voltage power battery to power the high voltage generator to start the engine.

[0020] 2. When the high-voltage power battery is not at high voltage, it can be divided into the following situations: ① When the power of the high-voltage power battery is zero, the controller can control the bidirectional DCDC converter to convert the 12V low voltage of the hybrid vehicle into high voltage to power the high-voltage generator to drive the engine to start the vehicle. At this time, the vehicle can be used normally in fuel mode, and the high-voltage power battery can be charged by the engine.

[0021] ② When the high-voltage power battery is too low to discharge, the controller can control the bidirectional DCDC converter to convert the hybrid vehicle's 12V low voltage into high voltage to power the high-voltage generator to drive the engine to start the vehicle. At this time, the vehicle can be used normally in fuel mode, and the power battery can be heated by the heat generated by the engine so that the high-voltage power battery can be used for power during subsequent vehicle driving.

[0022] ③ When the high-voltage power battery is at a low temperature and the temperature is too low to allow high voltage, the controller can control the bidirectional DCDC converter to convert the 12V low voltage of the hybrid vehicle into high voltage to power the high-voltage generator to drive the engine to start the vehicle. At this time, the vehicle can be used normally in fuel mode, and the heat generated by the engine is used to heat the high-voltage power battery. After the battery heats up, high voltage can be used in hybrid or electric mode.

[0023] ④ When the high-voltage system fails and cannot be supplied with high voltage, the controller can control the bidirectional DCDC converter to convert the hybrid vehicle's 12V low voltage into high voltage to power the high-voltage generator to drive the engine to start the vehicle. At this time, since the vehicle cannot be supplied with high voltage, it can be driven in fuel mode to nearby repairs without the need for a tow truck.

[0024] ⑤ When the vehicle is idle for a long time and the 12V low-voltage battery and the high-voltage power battery are depleted and the vehicle cannot be started, the low-voltage 12V battery can be manually jump-charged, and then the bidirectional DCDC converter is controlled by the controller to convert the hybrid vehicle's 12V low voltage into high voltage to power the high-voltage generator to drive the engine to start the vehicle, so that the vehicle can be used normally in fuel mode, and the high-voltage power battery can be charged by the engine, without the need for special treatment such as towing for repairs.

[0025] In addition, when the vehicle is driving, the controller controls the high-voltage power supply of the high-voltage power battery to flow into the bidirectional DCDC converter, and converts the high voltage into 12V low voltage through the bidirectional DCDC converter to power the on-board low-voltage system.

[0026] The system can reduce the application cost of hybrid vehicles while ensuring the stability of the high-voltage power supply starting method, making the vehicle usage scenarios more extensive and improving user experience and satisfaction.

[0027] Embodiment 2: like Figure 4 As shown: A dual power supply starting method using a dual power supply starting system of a hybrid vehicle, comprising the following steps: S1: The controller reads the state of the high-voltage power battery and determines whether the high-voltage power battery is in a power supply condition. If so, the high-voltage power battery receives the power supply instruction issued by the controller and executes the power supply instruction to supply power to the high-voltage generator; if not, execute step S2; S2: The controller reads the battery status of the 12V low-voltage battery and determines whether the 12V low-voltage battery is ready for power supply. If so, the 12V low-voltage battery receives the power supply instruction from the controller and executes the power supply instruction. The 12V low voltage is converted into high voltage through a bidirectional DCDC converter to power the high-voltage generator. If not, the 12V low-voltage battery is powered by artificial jumpering and step S2 is executed.

[0028] Preferably, it also includes: S3: During the driving process of the vehicle, the controller reads the power supply status of the low-voltage system of the vehicle and determines whether the power supply of the low-voltage system is stable. If so, the current status is maintained and step S3 is executed again after a set time; if not, step S4 is executed; S4: The controller controls the high voltage power supply of the high voltage power supply battery to flow into the bidirectional DCDC converter, and converts the high voltage into a 12V low voltage through the bidirectional DCDC converter to power the vehicle-mounted low voltage system.

[0029] Embodiment 3: A vehicle adopts a dual power supply starting system of a hybrid electric vehicle.

[0030] Embodiment 4: A computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the device where the computer-readable storage medium is located executes a dual-power supply starting method for a hybrid electric vehicle.

[0031] All other embodiments of the present invention obtained by ordinary technicians in the field without making any creative work based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A dual power supply starting system for a hybrid vehicle, characterized in that: include: The 12V low-voltage battery converts the 12V low voltage into high voltage through a bidirectional DCDC converter to power the high-voltage generator; Bidirectional DCDC converter converts 12V low voltage into high voltage; converts the high voltage of high-voltage power battery into 12V low voltage; High-voltage power battery, providing high voltage for the high-voltage generator; The high-voltage generator receives high-voltage power supply and starts the engine by starting itself; The engine starts itself through the high-voltage generator to provide power for the vehicle; The controller controls the start and stop of the high-voltage generator and the direction of the received high-voltage power supply; The 12V low-voltage battery is connected to a bidirectional DCDC converter; the bidirectional DCDC converter is connected to a controller; the controller is respectively connected to a high-voltage generator and a high-voltage power battery; the high-voltage generator is connected to an engine.

2. The dual power supply starting system for a hybrid vehicle according to claim 1, characterized in that: The 12V low-voltage battery is connected to the bidirectional DCDC converter through a low-voltage wiring harness; the bidirectional DCDC converter is connected to the controller through a high-voltage wiring harness; and the controller is respectively connected to the high-voltage generator and the high-voltage power battery through high-voltage wiring harnesses.

3. The dual power supply starting system for a hybrid vehicle according to claim 1, characterized in that: The high-voltage power battery also includes: converting the high voltage into a 12V low voltage through a bidirectional DCDC converter to power the vehicle-mounted low-voltage system.

4. A dual power supply starting method using the dual power supply starting system of a hybrid vehicle according to claim 1, characterized in that: The following steps are involved: S1: The controller reads the state of the high-voltage power battery and determines whether the high-voltage power battery is in a power supply condition. If so, the high-voltage power battery receives the power supply instruction issued by the controller and executes the power supply instruction to supply power to the high-voltage generator; if not, execute step S2; S2: The controller reads the battery status of the 12V low-voltage battery and determines whether the 12V low-voltage battery is ready for power supply. If so, the 12V low-voltage battery receives the power supply instruction from the controller and executes the power supply instruction. The 12V low voltage is converted into high voltage through a bidirectional DCDC converter to power the high-voltage generator. If not, the 12V low-voltage battery is powered by artificial jumpering and step S2 is executed.

5. The dual power supply starting method for a hybrid vehicle according to claim 4, characterized in that: Also includes: S3: During the driving process of the vehicle, the controller reads the power supply status of the low-voltage system of the vehicle and determines whether the power supply of the low-voltage system is stable. If so, the current status is maintained and step S3 is executed again after a set time; if not, step S4 is executed; S4: The controller controls the high voltage power supply of the high voltage power supply battery to flow into the bidirectional DCDC converter, and converts the high voltage into a 12V low voltage through the bidirectional DCDC converter to power the vehicle-mounted low voltage system.

6. A vehicle, characterized in that: A dual power supply starting system for a hybrid electric vehicle adopts the dual power supply starting system described in any one of claims 1 to 3.

7. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the device where the computer-readable storage medium is located executes the method described in claims 4-5.

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