Alcohol-electric hybrid power vehicle power system
By introducing a methanol fuel detection module and an energy buffer module into hybrid electric vehicles, the problems of inaccurate methanol fuel leak detection and short power battery life have been solved, enabling flexible power mode switching and efficient energy management, thereby improving vehicle performance and energy utilization efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-04-14
AI Technical Summary
Existing hybrid electric vehicles suffer from insufficient sensitivity and complexity in detecting methanol fuel leaks, shortened battery life, and unintelligent power distribution, making it difficult to meet the needs of various driving conditions.
A methanol-electric hybrid vehicle power system was designed, which includes a methanol fuel detection module, an energy buffer module, and an intelligent electronic control system. It can monitor methanol leakage and cut off power output in time, use a supercapacitor to buffer the braking energy of the electric motor, flexibly switch power modes, and optimize power distribution.
It enables timely detection and prevention of methanol fuel leaks, extends the life of the power battery, improves vehicle power performance and energy efficiency, and meets diverse driving needs.
Smart Images
Figure CN224117109U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hybrid power, specifically to a power system for alcohol-electric hybrid vehicles. Background Technology
[0002] Currently, most mainstream hybrid vehicles rely on gasoline and diesel fuel. In contrast, while methanol, a clean fuel, holds immense potential, it faces numerous challenges in practical applications. Methanol itself has poor fluidity and strong corrosiveness, making it prone to aging and wear in critical components such as fuel pipes and piston rubber rings during long-term use. Once these components malfunction, methanol fuel poses a risk of leakage. Fuel leaks can cause irreversible corrosion damage to surrounding electronic components and metal structures, and in severe cases, threaten the normal operation of the vehicle, greatly endangering the lives of drivers and passengers. Unfortunately, current technology for detecting methanol fuel leaks is either not sensitive enough to detect leaks in their early stages, or the detection equipment is complex and expensive, making large-scale application difficult. This results in difficulties in achieving efficient and reliable monitoring of methanol fuel leaks in real-world scenarios, hindering rapid and accurate feedback to users, and making it difficult to take effective countermeasures in a timely manner.
[0003] To improve driving range, new energy hybrid vehicles commonly employ regenerative braking mechanisms. During braking and idling, the system converts and stores the vehicle's kinetic energy into electrical energy. However, in actual driving, road conditions are complex and varied, and braking behavior is highly random and frequent. Frequent regenerative braking operations subject the battery to multiple high-current charge-discharge cycles in a short period. Over time, this severely damages the internal electrode material structure of the battery, causing rapid capacity decay and significantly shortening its lifespan. Currently, while there have been some attempts in the industry, such as adjusting the power threshold for regenerative braking and optimizing the battery management system, none have fundamentally solved the problem of efficiently recovering energy while properly protecting the battery during frequent regeneration. A mature and effective technical solution remains lacking.
[0004] In the field of power distribution in hybrid powertrains, existing technologies can dynamically allocate torque between the internal combustion engine and the electric motor based on vehicle operating conditions, reducing energy conversion losses to some extent. However, different driving conditions, such as frequent start-stop cycles in congested urban traffic, the need for continuous power at high speeds, and the requirement for high torque when climbing hills, place extremely stringent demands on the powertrain's response speed and output power matching. Existing technologies still have significant shortcomings in coordinating multiple power sources to flexibly and precisely adapt to various complex driving conditions, thereby maximizing both power performance and optimizing energy efficiency. The lack of intelligent and efficient power distribution prevents the full utilization of the advantages of both the methanol engine and the electric motor, limiting further improvements in the overall performance of hybrid vehicles. Utility Model Content
[0005] The purpose of this invention is to provide a methanol-electric hybrid vehicle power system that can adjust power output according to various vehicle operating conditions to reduce energy loss, and is equipped with a methanol fuel detection module to intervene in various electrical components through the electronic control module, thereby overcoming the shortcomings of the prior art.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] This utility model provides a power system for a methanol-electric hybrid vehicle, comprising an electronic control system, a methanol engine, and a methanol fuel tank. The methanol engine is connected to a generator and a clutch via a reducer. The clutch is connected to one end of a gear train, and the other end of the gear train is connected to a drive axle. The generator is connected to a motor controller, which is connected to a motor and a high-voltage electrical box. The motor and the high-voltage electrical box are connected to a power battery. The electronic control system connects a methanol fuel detection module, the generator, the motor controller, the power battery, and the high-voltage electrical box.
[0008] Furthermore, an energy buffer module is installed inside the high-voltage electrical box. The energy buffer module is electrically connected to the motor controller and the power battery inside the high-voltage electrical box. The energy buffer module includes multiple buffer branches connected in parallel, and a split inductor is provided at the input end of each buffer branch.
[0009] Furthermore, the buffer branch is a supercapacitor and a resistor connected in series.
[0010] Furthermore, the control switches for the energy buffer module are both output relays and input relays.
[0011] Furthermore, the electric motor is a three-phase AC motor that converts electrical energy into mechanical energy to power the vehicle.
[0012] Furthermore, the motor controller is equipped with an inverter for converting three-phase AC power into DC power.
[0013] Furthermore, the high-voltage electrical box contains an inverter for converting direct current into three-phase alternating current.
[0014] Furthermore, the methanol engine is connected to the generator via a reducer, the electric motor is connected to the gear system, and the engine is connected to the gear system.
[0015] Furthermore, the motor is electrically connected to the motor controller, and the motor controller is electrically connected to the high-voltage electrical box.
[0016] Furthermore, the power battery is connected to an external charging port.
[0017] Compared with the prior art, the present invention has the following beneficial technical effects:
[0018] This invention provides a methanol-electric hybrid vehicle power system that integrates a methanol engine and an electric motor, improving vehicle power performance and energy efficiency. The methanol engine is connected to a generator via a reducer, converting its mechanical energy into electrical energy for subsequent use. Simultaneously, the methanol engine also transmits power to the drive axle via a gear train through a reducer and clutch, directly providing power for vehicle movement. The electric motor, connected to the gear train, also provides power to the vehicle. This allows the vehicle to flexibly switch between pure methanol, pure electric, or hybrid modes depending on different driving conditions, meeting diverse driving needs, and adjusting power output according to various vehicle operating states to reduce energy loss.
[0019] This utility model discloses a high-voltage electrical box with an internal energy buffer module. The energy buffer module includes multiple buffer branches connected in parallel, each with a split inductor at its input terminal. Each buffer branch contains a supercapacitor and a resistor. During vehicle braking, the electric motor operates in a generator state, and the high-power braking energy generated can be rapidly absorbed by the supercapacitor. Due to the high power density and long cycle life of the supercapacitor, it can effectively cope with short-term high-power energy surges. The split inductors at the input terminals of each branch reduce current surges and protect circuit components. When the buffer branch has completed energy storage, the input relay disconnects and the output relay closes, transferring the stored energy to the power battery, achieving braking energy recovery, reducing energy waste, and preventing overcharging of the power battery, thus extending its service life. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the power system of an alcohol-electric hybrid vehicle according to an embodiment of the present invention.
[0021] Figure 2 This is a schematic diagram of the connection structure of the buffer module inside the high-voltage electrical box in an embodiment of this utility model. Detailed Implementation
[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0024] Reference Figure 1 and Figure 2This utility model provides a power system for a methanol-electric hybrid vehicle, including an electronic control system and a methanol fuel detection module. The methanol fuel detection module is connected to the methanol engine and the methanol fuel tank. The module is specifically designed to monitor the methanol sealing of the fuel tank and the methanol engine. Upon detecting a methanol leak, it immediately issues an alarm and provides feedback to the driver regarding the leak location and condition, allowing the driver to take timely countermeasures. Simultaneously, the electronic control system, connected to the methanol fuel detection module, can promptly cut off power output or prevent vehicle start-up, avoiding risky driving in the event of a methanol leak. The methanol engine is connected to a generator and a clutch via a reducer. The clutch is connected to one end of a gear train, and the other end of the gear train is connected to a drive axle. The generator is connected to a motor controller, which is connected to a motor and a high-voltage electrical box. The motor is connected to the high-voltage electrical box, which is connected to a power battery. The generator uses a three-phase AC motor to convert electrical energy into mechanical energy to power the vehicle. During vehicle start-up, low-speed driving, and when rapid power response is required, the motor can quickly output torque, enabling smooth vehicle start-up and acceleration. The motor is connected to the gear train, transmitting its generated mechanical energy to the gear train, ultimately driving the vehicle. Furthermore, during vehicle braking, the electric motor can switch to generator mode, converting the vehicle's kinetic energy into electrical energy, which is then stored in the power battery via an energy buffer module, achieving energy recovery. The electronic control system connects to a methanol fuel detection module, generator, motor controller, power battery, and high-voltage electrical box; the power battery is connected to an external charging port.
[0025] Preferably, the motor controller is equipped with an inverter, which converts the three-phase AC power output from the generator into DC power for storage in the power battery; on the other hand, when the motor needs to be driven, it converts the DC power output from the power battery back into three-phase AC power and precisely controls the motor through UVW three-phase control.
[0026] Preferably, the methanol engine is connected to the generator via a reducer, the electric motor is connected to the gear system, and the engine is connected to the gear system.
[0027] Preferably, the motor is electrically connected to the motor controller, and the motor controller is electrically connected to the high-voltage electrical box.
[0028] Preferably, the high-voltage electrical box contains an energy buffer module, which is electrically connected to the motor controller and the power battery. The energy buffer module comprises a distributed absorption and buffer network consisting of multiple buffer branches connected in parallel. This network plays a buffering role during high-frequency charging and discharging processes such as regenerative braking, quickly absorbing the high-power braking energy generated by the motor during braking. Each buffer branch input has a split inductor. Each buffer branch consists of a supercapacitor and a resistor connected in series. The high-voltage electrical box also contains an inverter to convert DC power to three-phase AC power. The supercapacitor has high power density, can quickly absorb short-term high-power braking energy, and has an extremely long cycle life. Multiple split inductors are present at the input of each branch. As shown in the figure, each absorption branch input has a split inductor to reduce current surges. Each buffer branch consists of a supercapacitor and a resistor. When the generator supplies power, the input relay closes, the output relay opens, and each buffer branch begins energy storage. When the energy is fully charged, the input relay opens, and the output relay closes to charge the power battery.
[0029] The technical solution of this utility model is as follows: the electronic control system connects the methanol fuel detection module, generator, motor controller, power battery and high voltage electrical box, and the electronic control system can intervene and control each important circuit component according to the monitoring results of the methanol fuel detection module.
[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A power system for an alcohol-electric hybrid vehicle, characterized in that, The system includes an electronic control system, a methanol engine, and a methanol fuel tank. The methanol engine is connected to a generator and a clutch via a reducer. The clutch is connected to one end of a gear train, and the other end of the gear train is connected to a drive axle. The generator is connected to a motor controller, which is connected to a motor and a high-voltage electrical box. The motor is connected to the high-voltage electrical box, and the high-voltage electrical box is connected to a power battery. The electronic control system connects the generator, the motor controller, the power battery, and the high-voltage electrical box.
2. The alcohol-electric hybrid vehicle power system according to claim 1, characterized in that, The high-voltage electrical box is equipped with an energy buffer module, which is electrically connected to the motor controller and the power battery inside the high-voltage electrical box. The energy buffer module includes multiple buffer branches connected in parallel, and a split inductor is provided at the input end of each buffer branch.
3. The alcohol-electric hybrid vehicle power system according to claim 2, characterized in that, The buffer branch consists of a supercapacitor and a resistor connected in series.
4. The alcohol-electric hybrid vehicle power system according to claim 2, characterized in that, The control switches for the energy buffer module are both output relays and input relays.
5. The alcohol-electric hybrid vehicle power system according to claim 1, characterized in that, The electric motor is a three-phase AC motor.
6. The alcohol-electric hybrid vehicle power system according to claim 5, characterized in that, The motor controller is equipped with an inverter for converting three-phase AC power into DC power.
7. The alcohol-electric hybrid vehicle power system according to claim 5, characterized in that, The high-voltage electrical box contains an inverter used to convert direct current into three-phase alternating current.
8. The alcohol-electric hybrid vehicle power system according to claim 1, characterized in that, The methanol engine is connected to the generator via a reducer, the electric motor is connected to the gear system, and the engine is connected to the gear system.
9. The alcohol-electric hybrid vehicle power system according to claim 1, characterized in that, The motor is electrically connected to the motor controller, and the motor controller is electrically connected to the high-voltage electrical box.
10. The alcohol-electric hybrid vehicle power system according to claim 1, characterized in that, The power battery is connected to an external charging port.