Range-extending power supply system for new energy automobile

Abstract

The invention discloses a range extending power supply system for a new energy automobile, and belongs to the field of automobile driving systems. The system comprises a frame, front and rear wheels, rechargeable storage batteries I and II, a driving motor and a range extending power supply assembly. An inverter I is arranged between the storage batteries I and II and the driving motor; an inverter II is arranged between the storage batteries I and II and the range extending power supply assembly; a direct-current power supply module and an alternating-current power supply module are arranged in the range extending power supply assembly, the alternating-current power supply module is connected with a charging controller through a transformer, and the charging controller is connected with the two storage batteries. The first storage battery and the second storage battery are lithium iron phosphate storage batteries, and the charging controller is provided with a charging socket. The range extending system has the advantages that firstly, the cruising ability can be enhanced through multi-power-supply cooperation and intelligent switching; secondly, a self-charging function and an external charging function are achieved; the stability of the power system is improved through the double-storage-battery redundancy design; the inverter optimizes electric energy conversion, and the energy utilization efficiency can be improved by utilizing the solar panel; and finally, the battery is high in safety and long in service life.

Description

Technical Field

[0001] The present invention belongs to the field of automobile drive systems, and more specifically, relates to a new energy automobile range-extending power supply system. Background Art

[0002] With the enhancement of environmental awareness and the adjustment of energy structure, new energy vehicles have received extensive attention and rapid development as a clean and efficient means of transportation. In the field of new energy vehicles, new energy vehicles driven by four-wheel independent hub motors have the advantages of controllable driving torque and easy measurement of torque and speed. They can achieve multiple functions such as anti-skid, anti-rollover, differential power steering, etc., which greatly improves the handling stability and driving safety of the vehicle, and are considered to be a technical direction with great development potential.

[0003] However, a key problem facing new energy vehicles is their relatively low range. The limited range brings mileage anxiety to users, limiting the further popularization and application of new energy vehicles. In actual use, users often frequently look for charging facilities due to concerns about insufficient power, which brings great inconvenience to travel.

[0004] In addition, the existing new energy vehicle power supply system also has some areas that need to be improved in terms of energy utilization efficiency, charging convenience, power system stability, battery safety and life. For example, some vehicles have a single charging method and are overly dependent on external charging facilities; the power system may face the risk of power interruption when the battery fails; the loss of electric energy during conversion and transmission affects the energy utilization efficiency; the safety and life of the battery also increase the user's cost and potential risks. Therefore, it is of great practical significance to develop a power supply system that can effectively solve the above problems and improve the endurance and comprehensive performance of new energy vehicles. Summary of the invention

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the present invention provides a new energy vehicle range-extending power supply system, comprising a frame, a front wheel arranged on the front side of the frame, and a rear wheel arranged on the rear side of the frame; and further comprising a rechargeable battery 1, a rechargeable battery 2, a driving motor for driving the rear wheel, and a range-extending power supply assembly for extending the range of the vehicle; An inverter 1 is provided between the battery 1 and the rear drive motor, and the battery 1 is electrically connected to the drive motor through the inverter 1; An inverter 2 is provided between the battery 1 and the extended-range power supply assembly, and the battery 1 is electrically connected to the extended-range power supply assembly through the inverter 2; The extended-range power supply assembly is internally provided with a DC power supply module, and the DC power supply module is electrically connected to the inverter 1, and the extended-range power supply assembly is electrically connected to the drive motor through the inverter 1; The extended-range power supply assembly is internally provided with an AC power supply module, and the AC power supply module is externally connected to a transformer, and the output end of the transformer is electrically connected to a charging controller arranged on the vehicle frame; The charging controller is electrically connected to the first battery and the second battery.

[0006] Preferably, the second storage battery is also electrically connected to the drive motor through the first inverter.

[0007] Preferably, the second battery is also connected to the range-extended power supply assembly through the second inverter.

[0008] Preferably, an extended-range generator module is provided inside the extended-range power supply assembly, the extended-range generator module is electrically connected to an inverter 2 provided outside, and the output end of the extended-range generator module is respectively connected to a DC power supply module and an AC power supply module.

[0009] Preferably, the rechargeable battery 1 and battery 2 are both lithium iron phosphate batteries.

[0010] Preferably, the charging controller is also provided with a charging socket connected to an external power source.

[0011] Beneficial effects: Compared with the prior art, the advantages and positive effects of the present invention are: 1. Enhance battery life Multi-power supply coordinated power supply During the driving process of the car, battery 1 and battery 2 can supply power to the drive motor in turn, and the extended-range power supply assembly also participates in the power supply after the vehicle is started. This mode of multi-power coordinated work greatly increases the vehicle's power reserve, effectively extends the vehicle's cruising range, enables the vehicle to travel farther, reduces the trouble of frequent charging due to insufficient power, and improves the user's convenience.

[0012] Smart switching ensures battery life When the power of battery 1 drops below 60%, it automatically switches to battery 2 for power supply, ensuring the continuity of power supply. This intelligent switching mechanism can reasonably utilize battery resources at different power levels, further optimize the endurance of the entire power supply system, and ensure that the vehicle will not stop running due to the exhaustion of a single battery during driving.

[0013] 2. Optimize the charging mechanism Self-charging function The electric energy generated by the range-extending generator is transmitted to the charging controller through the AC power supply module and the transformer, and can charge the battery. This self-charging function during driving fully utilizes the electric energy generated by the range-extending generator, reduces dependence on external charging facilities, improves the energy self-sufficiency rate of the vehicle, and further improves the vehicle's endurance and efficiency.

[0014] External charging convenience The charging controller is equipped with a charging interface connected to an external power source, which is convenient for the vehicle to be connected to an external power source for charging when needed. Whether it is a home charging pile, a public charging pile or other charging facilities, the battery can be easily charged, providing users with a variety of charging options and increasing the convenience of charging.

[0015] 3. Improve the stability of the power system Dual battery redundancy design Both battery 1 and battery 2 can supply power to the drive motor through inverter 1. The redundant design of the dual batteries provides a reliable power supply guarantee for the drive motor. Even if one of the batteries fails, the other battery can continue to provide power to the drive motor to maintain the normal driving of the vehicle, greatly reducing the risk of the vehicle losing power due to battery failure and improving the stability and reliability of the entire power system.

[0016] 4. Improve energy efficiency Inverters optimize power conversion The multiple inverters in the system can accurately and efficiently convert the direct current of the battery into the alternating current required for the drive motor, reducing the loss of electricity during the conversion process. At the same time, the reasonable connection and power transmission design between the modules in the extended-range power supply assembly ensure the efficient flow and utilization of electricity in the system, which significantly improves the energy utilization efficiency of the entire power supply system. In addition, the solar panels can also make full use of solar energy to convert it into electricity and store it in the battery to power the electric vehicle.

[0017] 5. Ensure battery safety and life High quality lithium iron phosphate battery Both battery 1 and battery 2 use lithium iron phosphate batteries, which have the characteristics of high energy density and can store more electricity in the same volume and weight, which is conducive to improving the vehicle's endurance. At the same time, lithium iron phosphate batteries have good safety and can effectively reduce the risk of safety accidents such as fire and explosion during battery use, providing users with a safer use environment. In addition, its long life reduces the frequency of battery replacement and reduces the user's use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram showing the overall structure of a new energy vehicle range-extended power supply system provided in this embodiment. DETAILED DESCRIPTION

[0020] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0021] Example In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0023] Embodiment, as can be seen from the drawings of the specification, this solution provides a new energy vehicle range-extending power supply system, including a frame 1, a front wheel 2 arranged on the front side of the frame 1, and a rear wheel 3 arranged on the rear side of the frame; it also includes a rechargeable battery 1 4, a rechargeable battery 2 5, a drive motor 6 for driving the rear wheel, and an extended-range power supply assembly 7 for extending the range of the new energy vehicle; An inverter 8 is provided between the battery 4 and the drive motor 6, and the battery 4 is electrically connected to the drive motor 6 through the inverter 8; An inverter 2 9 is provided between the battery 1 4 and the extended-range power supply assembly 7, and the battery 1 4 is electrically connected to the extended-range power supply assembly 7 through the inverter 2 9; The extended-range power supply assembly 7 is internally provided with a DC power supply module 71, and the DC power supply module 71 is electrically connected to an inverter 1 8, and the extended-range power supply assembly 7 is electrically connected to a drive motor 6 via an inverter 1 8; The extended-range power supply assembly 7 is internally provided with an AC power supply module 72, and the AC power supply module 72 is externally connected to a transformer 10, and the output end of the transformer 10 is electrically connected to a charging controller 11 provided on the vehicle frame 1; The charging controller 11 is electrically connected to the storage battery 1 4 and the storage battery 2 5 .

[0024] Furthermore, the battery 2 5 is also electrically connected to the drive motor 6 through the inverter 1 8 .

[0025] Furthermore, the battery 2 5 is also connected to the extended-range power supply assembly 7 through the inverter 2 9 .

[0026] Furthermore, the extended-range power supply assembly 7 is internally provided with an extended-range generator module 73, the extended-range generator module 73 is electrically connected to an inverter 2 9 arranged outside, and the output end of the extended-range generator module is respectively connected to a DC power supply module and an AC power supply module.

[0027] Furthermore, the rechargeable battery 1 4 and the rechargeable battery 2 5 are both lithium iron phosphate batteries.

[0028] Furthermore, the charging controller 11 is also provided with a charging socket connected to an external power source.

[0029] Furthermore, a solar panel is provided on the top of the rack, and the solar panel is connected to a charging controller, and the solar panel transmits electric energy to battery 1 and battery 2 through the charging controller.

[0030] Working principle, In the above embodiment, when the electric vehicle is started, the battery provides power to the drive motor through the inverter, and the drive motor drives the rear wheels to rotate, and the new energy vehicle starts; After the new energy vehicle is started, the battery 1 supplies power to the range extender generator through the inverter 2. After the range extender generator generates power, the DC power supply module transmits the power to the drive motor through the inverter. At this time, the battery 1 and the range extender power supply assembly supply power to the drive motor at the same time. When the power of battery one drops below 60%, battery one stops discharging through the controller (here, a power monitoring device is provided in the system to continuously monitor the power status of battery one. When the power value is detected to be lower than the set 60% threshold, the monitoring device transmits a signal to the controller. The controller disconnects the discharge circuit of battery one through the control circuit according to the received signal, thereby preventing battery one from continuing to discharge. This can avoid excessive discharge of battery one and protect the battery, while triggering the intelligent switching mechanism to ensure the endurance continuity of the entire power supply system); battery two supplies power, and battery two supplies power to the range extender generator through inverter two. After the range extender generator generates power, the DC power supply module transmits electric energy to the drive motor through the inverter to drive the rear wheels. At this time, battery two and the range extender power supply assembly simultaneously supply power to the drive motor; at the same time, the AC power supply module transmits the electric energy generated by the range extender motor to the charging controller through the transformer to charge battery one.

[0031] When the power level of Battery 2 drops below 60%, Battery 2 stops discharging through the controller (here, a power monitoring device is provided in the system to continuously monitor the power status of Battery 2. When the power value is detected to be lower than the set 60% threshold, the monitoring device transmits a signal to the controller. Based on the received signal, the controller disconnects the discharge circuit of Battery 2 through the control circuit, thereby preventing Battery 2 from continuing to discharge. This can avoid excessive discharge of Battery 2 and protect Battery 2, while triggering the intelligent switching mechanism to ensure the endurance continuity of the entire power supply system). At this time, Battery 1 supplies power, and Battery 1 supplies power to the range extender generator through Inverter 2. After the range extender generator generates power, the DC power supply module transmits the electric energy to the drive motor through the inverter to drive the rear wheels. At this time, Battery 1 and the range extender power supply assembly simultaneously supply power to the drive motor; at the same time, the AC power supply module transmits the electric energy generated by the range extender motor to the charging controller through the transformer to charge Battery 2.

[0032] When the vehicle is parked in the sun, the solar panels installed on the top of the vehicle body convert solar energy into electrical energy, and at the same time use the electrical energy to replenish battery 1 and battery 2 through the charging controller.

[0033] The above embodiments and working principles have the following advantages: 1. Enhance battery life Multi-power supply coordinated power supply During the driving process of the new energy vehicle, Battery 1 and Battery 2 can successively supply power to the drive motor, and the extended-range power supply assembly also participates in the power supply after the vehicle is started. This mode of multi-power coordinated operation greatly increases the vehicle's power reserve, effectively extends the range of new energy vehicles, and enables the vehicle to travel a longer distance. In addition, the solar panels installed on the top of the vehicle body convert solar energy into electrical energy, and at the same time use the electrical energy to supplement Battery 1 and Battery 2 through the charging controller, reducing the trouble of frequent charging due to insufficient power and improving the user's convenience.

[0034] Smart switching ensures battery life When the power of battery 1 drops below 60%, it automatically switches to battery 2 for power supply, ensuring the continuity of power supply. This intelligent switching mechanism can reasonably utilize battery resources at different power levels, further optimize the endurance of the entire power supply system, and ensure that the vehicle will not stop running due to the exhaustion of a single battery during driving.

[0035] 2. Optimize the charging mechanism Self-charging function The electric energy generated by the range-extending generator is transmitted to the charging controller through the AC power supply module and the transformer, and can charge the battery. This self-charging function during driving fully utilizes the electric energy generated by the range-extending generator and the electric energy generated by the solar panels, reduces the dependence on external charging facilities, improves the energy self-sufficiency rate of the vehicle, and further improves the vehicle's endurance and efficiency.

[0036] External charging convenience The charging controller is equipped with a charging interface connected to an external power source, which is convenient for the vehicle to be connected to an external power source for charging when needed. Whether it is a home charging pile, a public charging pile or other charging facilities, the battery can be easily charged, providing users with a variety of charging options and increasing the convenience of charging.

[0037] 3. Improve the stability of the power system Dual battery redundancy design Both battery 1 and battery 2 can supply power to the drive motor through inverter 1. The redundant design of the dual batteries provides a reliable power supply guarantee for the drive motor. Even if one of the batteries fails, the other battery can continue to provide power to the drive motor to maintain the normal driving of the vehicle, greatly reducing the risk of the vehicle losing power due to battery failure and improving the stability and reliability of the entire power system.

[0038] 4. Improve energy efficiency Inverters optimize power conversion The multiple inverters in the system can accurately and efficiently convert the direct current of the battery into the alternating current required for the drive motor, reducing the loss of electricity during the conversion process. At the same time, the reasonable connection and power transmission design between the modules in the extended-range power supply assembly ensure the efficient flow and utilization of electricity in the system, which significantly improves the energy utilization efficiency of the entire power supply system. In addition, the solar panels can also make full use of solar energy to convert it into electricity and store it in the battery to power the electric vehicle.

[0039] 5. Ensure battery safety and life High quality lithium iron phosphate battery Both battery 1 and battery 2 use lithium iron phosphate batteries, which have the characteristics of high energy density and can store more electricity in the same volume and weight, which is conducive to improving the vehicle's endurance. At the same time, lithium iron phosphate batteries have good safety and can effectively reduce the risk of safety accidents such as fire and explosion during battery use, providing users with a safer use environment. In addition, its long life reduces the frequency of battery replacement and reduces the user's use cost.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A new energy vehicle range-extending power supply system, comprising a frame, a front wheel arranged on the front side of the frame, and a rear wheel arranged on the rear side of the frame; characterized in that: It also includes a rechargeable battery 1, a rechargeable battery 2, a drive motor for driving rear wheels, and a range-extending power supply assembly for extending the range of the vehicle; An inverter 1 is provided between the battery 1 and the rear drive motor, and the battery 1 is electrically connected to the drive motor through the inverter 1; An inverter 2 is provided between the battery 1 and the extended-range power supply assembly, and the battery 1 is electrically connected to the extended-range power supply assembly through the inverter 2; The extended-range power supply assembly is internally provided with a DC power supply module, and the DC power supply module is electrically connected to the inverter 1, and the extended-range power supply assembly is electrically connected to the drive motor through the inverter 1; The extended-range power supply assembly is internally provided with an AC power supply module, and the AC power supply module is externally connected to a transformer, and the output end of the transformer is electrically connected to a charging controller arranged on the vehicle frame; The charging controller is electrically connected to the first battery and the second battery.

2. A new energy vehicle range-extending power supply system according to claim 1, characterized in that: The second storage battery is also electrically connected to the drive motor through the first inverter.

3. A new energy vehicle range-extending power supply system according to claim 1, characterized in that: The second storage battery is also connected to the range-extending power supply assembly through the second inverter.

4. A new energy vehicle range-extending power supply system according to claim 1, characterized in that: The extended-range power supply assembly is internally provided with an extended-range generator module, the extended-range generator module is electrically connected to an inverter 2 arranged outside, and the output end of the extended-range generator module is respectively connected to a DC power supply module and an AC power supply module.

5. A new energy vehicle range-extending power supply system according to claim 1, characterized in that: The rechargeable battery 1 and battery 2 are both lithium iron phosphate batteries.

6. A new energy vehicle range-extending power supply system according to claim 1, characterized in that: The charging controller is also provided with a charging socket connected to an external power source.

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