CN103273853A - Electric car power system - Google Patents

Abstract

The present invention proposes an electric vehicle power system, including a power battery, a control system, a motor, and a drive shaft. The power battery and the motor are controlled by the control system. The electric vehicle power system also includes a metal-air battery. The metal-air battery is controlled by the control system, and both the power battery and the metal-air battery can output power under the control of the control system. Using this electric vehicle power system combines the advantages of short start-up time of ordinary power batteries and high energy density of metal-air batteries, which can not only make up for the shortcoming of low energy density of power batteries, which leads to short driving range of electric vehicles, but also avoid metal-air batteries. The disadvantages of low battery power density and long start-up time.

Description

Electric Vehicle Powertrain

technical field

The invention relates to the technical field of electric vehicles, and in particular to an electric vehicle power system.

Background technique

An electric vehicle refers to a vehicle powered by a vehicle-mounted power supply, driven by a motor to drive the wheels, and conforming to the requirements of road traffic and safety regulations. Due to its smaller impact on the environment than traditional cars, its prospects are widely optimistic, but the current technology is not yet fully mature.

The power supply provides electric energy for the driving motor of the electric vehicle, and the electric motor converts the electric energy of the power supply into mechanical energy, and drives the wheels and working devices through the transmission device or directly. At present, the most widely used power source for electric vehicles is lead-acid batteries. However, with the development of electric vehicle technology, lead-acid batteries are gradually replaced by other batteries due to their low specific energy, slow charging speed, and short life. The power sources under development are mainly lithium-ion batteries.

The energy density of metal-air batteries has great advantages over lithium-ion batteries, which can well solve the shortcoming of the short driving range of existing electric vehicles. Before lithium-ion batteries made a major breakthrough in energy density, metal-air batteries were the main An ideal energy source. However, metal-air batteries have major shortcomings in power density and start-up time, and it is difficult to meet the requirements as an energy source for electric vehicles alone.

Contents of the invention

In view of the above problems, the object of the present invention is to provide a power system for electric vehicles, which combines the advantages of short start-up time of ordinary power batteries and high energy density of metal-air batteries, which can make up for the low energy density of power batteries and lead to a longer driving range of electric vehicles. The shortcoming of being short can also avoid the shortcoming of low power density and long start-up time of metal-air batteries.

An electric vehicle power system of the present invention includes a power battery, a control system, a motor, and a drive shaft, the power battery and the motor are controlled by the control system, and the electric vehicle power system also includes a metal-air battery, so The metal-air battery is controlled by the control system, and both the power battery and the metal-air battery can output power under the control of the control system.

In one embodiment of the present invention, the aforementioned power battery has a charging interface.

In one embodiment of the present invention, the aforementioned power battery is a lithium-ion battery or a nickel-metal hydride battery.

In one embodiment of the present invention, the aforementioned metal-air battery is an aluminum-air battery or a zinc-air battery.

In one embodiment of the present invention, the aforementioned control system is a vehicle controller of an automobile.

In one embodiment of the invention, the aforesaid drive shaft is the front axle or the rear axle of the automobile.

The beneficial effect of the present invention is that, by adopting the electric vehicle power system of the present invention, combining the advantages of short start-up time of ordinary power batteries and high energy density of metal-air batteries can make up for the low energy density of power batteries, resulting in short driving range of electric vehicles It can also avoid the disadvantages of low power density and long start-up time of metal-air batteries. The metal-air battery can be directly used as an energy supply component in the range-extending stage, without the need for energy conversion process, and the system efficiency is high; because the metal-air battery is the main energy output unit in the range-extending stage, there is no need to replenish fuel, and zero fuel consumption is truly achieved .

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following specific examples, and with the accompanying drawings, are described in detail as follows.

Description of drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the electric vehicle power system of the present invention.

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the electric vehicle power system proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , detailed as follows:

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the drawings. Through the description of specific implementation methods, the technical means and effects of the present invention to achieve the intended purpose can be understood more deeply and specifically, but the attached drawings are only for reference and description, and are not used to explain the present invention limit.

Referring to FIG. 1 , the power system of an electric vehicle according to a preferred embodiment of the present invention includes a power battery 1 , a metal-air battery 2 , a control system 3 , a motor 4 , and a drive shaft 5 .

The power battery 1 has a charging interface 12, which can be a lithium-ion battery or a nickel-metal hydride battery, etc., and serves as the main power output component to ensure the performance requirements of the vehicle.

The metal-air battery 2 can be an aluminum-air battery or a zinc-air battery, etc., and is used as a range-extending energy output component to solve the vehicle operation requirements when the power battery 1 is insufficient.

The control system 3 may be a vehicle controller of an automobile. The power battery 1 , the metal-air battery 2 , and the motor 4 are all controlled by the control system 3 .

Drive shaft 5 can be the front axle of automobile, also can be the rear axle of automobile.

When the electric vehicle using the electric vehicle power system of the preferred embodiment of the present invention is started, the control system 3 controls the power battery 1 to supply power to start the electric vehicle. After starting, different control strategies can be adopted, that is, the control system 3 can control the power battery 1 to stop power supply, while the metal-air battery 2 supplies power, that is, the power battery 1 supplies power in the starting state, while the metal-air battery 2 supplies power in the normal driving state The power battery 1 can also be controlled by the control system 3 to continue to supply power until the power battery 1 is insufficient (but it should be noted that the power required to start the vehicle more than one time should be reserved), and the power battery 1 is controlled by the control system 3 to stop power supply. And powered by metal-air battery 2 .

When braking, the energy generated by the motor 4 is controlled by the control system 3 and distributed to the power battery 1 to supplement the power.

In this way, the electric vehicle power system of the present invention combines the advantages of short start-up time of ordinary power batteries and high energy density of metal-air batteries, which can not only make up for the shortcoming of low energy density of power batteries, resulting in short driving range of electric vehicles, but also Avoid the disadvantages of low power density and long start-up time of metal-air batteries. The metal-air battery can be directly used as an energy supply component in the range-extending stage, without the need for energy conversion process, and the system efficiency is high; because the metal-air battery is the main energy output unit in the range-extending stage, there is no need to replenish fuel, and zero fuel consumption is truly achieved .

The above description is only an embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with the embodiment, it is not intended to limit the present invention. Without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or be modified into equivalent embodiments with equivalent changes, but if it does not deviate from the technical solution of the present invention, the technical essence of the present invention can be used for the above Any simple modifications, equivalent changes and modifications made in the embodiments still fall within the scope of the technical solution of the present invention.

Claims (6)

1. An electric vehicle power system, including a power battery (1), a control system (3), a motor (4), and a drive shaft (5), the power battery (1) and the motor (4) are controlled by the The control system (3), characterized in that the electric vehicle power system also includes a metal-air battery (2), the metal-air battery (2) is controlled by the control system (3), and the power battery ( Both 1) and the metal-air battery (2) can output power under the control of the control system (3). 2. The electric vehicle power system according to claim 1, characterized in that the power battery (1) has a charging interface (12). 3. The electric vehicle power system according to claim 2, characterized in that the power battery (1) is a lithium-ion battery or a nickel-metal hydride battery. 4. The electric vehicle power system according to claim 1, characterized in that, the metal-air battery (2) is an aluminum-air battery or a zinc-air battery. 5. The electric vehicle power system according to claim 1, characterized in that the control system (3) is a vehicle controller of the vehicle. 6. The electric vehicle power system according to claim 1, characterized in that, the drive shaft (5) is a front axle or a rear axle of the vehicle.