CN201845828U - Fuel cell stroke lengthening unit system - Google Patents

Abstract

The utility model relates to a fuel cell range extender system, which includes a fuel cell module, a DC/DC module and a general controller module, the fuel cell module and the DC/DC module are connected by wires, both of which are provided with a controller, The controller communicates with the general controller module; it also includes a DC/AC module, which is connected to the fuel cell module and the DC/DC module through wires, and also has a controller that communicates with the general controller module. The fuel cell converts the chemical energy of hydrogen and oxygen into electrical energy as energy input; the DC/DC module controls the fuel cell output voltage within a wide range within the range required by the power bus; the DC/AC module converts the fuel cell output direct current Can be converted into 220V AC. Therefore, the utility model can be used as a fuel cell range extender that can be plugged quickly to improve the driving range of the electric vehicle, and can also be used as an independent vehicle-mounted civil 220V AC power supply and connected to the civil power grid when the vehicle is idle.

Description

Fuel Cell Range Extender System

technical field

The utility model relates to the field of electric vehicles, in particular to a fuel cell range extender system for electric vehicles.

Background technique

The existing fuel cell power systems are all fixed, with fuel cells and batteries fixed on the frame, but the cost of fuel cells is relatively high, and with the continuous development of battery technology, the mileage that batteries alone can provide It can already meet the requirements of the medium distance, so the fuel cell seems a bit wasteful in this type of situation, so it is necessary to design a system to solve the above problems.

Utility model content

The purpose of the utility model is to provide a fuel cell range extender system, which is an independent, fast plug-in modular system, compact in structure and easy to use.

For achieving above object, the solution of the present utility model is:

The utility model adopts an independent, pluggable and modular system structure, and combines the fuel cell system, the hydrogen storage and delivery system and the DC/DC converter into a modular whole, realizing the flexibility and practicality of the system sex. A new type of vehicle power system is formed. At the same time, the system also has the characteristics of multi-purpose and multi-function. When the vehicle is idle, the module can be connected to the civil power network through the inverter to realize the concept of smart grid. In addition, the system can also be used alone as an emergency power supply.

A fuel cell range extender system, which includes a fuel cell module, a DC/DC module and a general controller module, the fuel cell module and the DC/DC module are connected by wires, both of which are provided with a controller, and through the control The controller communicates with the general controller module. Therefore, it can be used as a quickly pluggable fuel cell range extender to improve the driving range of electric vehicles.

It also includes a DC/AC module, which is respectively connected to the fuel cell module and the DC/DC module through wires, and which also has a controller communicating with the general controller module. Furthermore, it can be used as an independent 220V AC power supply for civilian vehicles and connected to the civil power grid when the vehicle is idle, supplemented by the power battery of the electric vehicle itself, to supply power to the power network, so as to alleviate the impact of peak power consumption on the power network system during working hours during the day , to realize the concept of vehicle-smart grid (Vehicle to Grid).

The fuel cell includes a hydrogen storage and delivery system, a fuel cell stack, which converts the chemical energy of hydrogen and oxygen into electrical energy as an energy input.

The DC/DC module controls the wide output voltage of the fuel cell within the range required by the power bus, its input voltage range should include the range of fluctuations in the output voltage of the fuel cell, and the rated power should be greater than or equal to the output of the fuel cell Power, whose output voltage is determined by the voltage of the power bus on the electric vehicle.

The general controller module also communicates with external objects, which obtains the expected output power of the system from the outside through the CAN bus, notifies the vehicle controller of the current maximum output power of the system, fault diagnosis and the transmission of each module data to the vehicle controller upload.

The DC/AC module converts the direct current energy output by the fuel cell into 220V alternating current.

Due to the adoption of the above technical solutions, the utility model has the following beneficial effects:

1. Compact structure, independently become an energy source;

2. High power and energy density;

3. The modular lightweight design can be quickly plugged and installed;

4. It has multiple functions and multiple uses.

Description of drawings

Fig. 1 is the structural representation of the utility model system.

Detailed ways

Below in conjunction with the embodiment shown in the accompanying drawings the utility model is further described.

The utility model separates the power system composed of the fuel cell module and the DC/DC module from the fuel cell hybrid power system to form an independent, fast plug-in modular system. At the same time, the module also has multi-purpose characteristics, such as As an emergency power supply, it can provide vehicle power supply, or be connected to the civil power grid and so on.

The utility model includes: a fuel cell module, a DC/DC module, a DC/AC module and a controller module; the fuel cell module includes a hydrogen storage and delivery system and the fuel cell stack itself. The fuel cell module, the DC/DC module and the DC/AC module are connected by direct current wires. The role of the fuel cell is to convert the electrochemical energy of hydrogen and oxygen into electrical energy, which is the energy source of the entire system. The function of the DC/DC module is to control the wide output voltage of the fuel cell within the range required by the power bus to ensure the normal operation of the vehicle power system. The function of the DC/AC module is to convert the direct current energy output by the fuel cell into the 220V alternating current used by the daily power grid. The whole system adopts distributed control, each module has its own controller, and the general controller of the system is responsible for the coordination of the work among the modules, fault diagnosis and communication with the outside, and the communication between the controllers and the outside A high-speed time-triggered bus (TTCAN) with a baud rate of 500K is adopted. The individual controller of each module is equipped with the module itself, but it is required to have a CAN bus interface, and the general controller needs to be assembled by itself, and the following functions need to be achieved: obtain the expected output power of the system from the outside through the CAN bus, and inform the vehicle control The maximum output power of the current system of the controller, fault diagnosis and upload of each module data to the vehicle controller, etc. In order to achieve a modular design that can be plugged quickly, the whole system is divided into three parts. These three parts are divided according to the volume, weight and installation arrangement of the components. The first part is hydrogen storage and The transmission system, the second part is the fuel cell stack and its controller, and the third part is mainly DCDC and the interface with the vehicle power system. The three parts are installed on the vehicle one by one, and finally form a whole quick plug-in range extender system, which meets the requirement that one person can complete the loading and unloading tasks of the system, greatly improving the convenience of system use.

The utility model needs to determine the rated output power of the fuel cell according to the specific requirements of the electric vehicle power system and considering the system efficiency. The input voltage range of the DC/DC module should include the fluctuation range of the output voltage of the fuel cell, and the rated power must be greater than or equal to the fuel cell The output power of the battery. The output voltage of the DC/DC module is determined by the voltage of the power bus on the electric vehicle. Since the system is a flexible and pluggable design, the selection of all components is based on the minimum volume and weight under the premise of meeting the performance requirements.

The system of the utility model can be used as a fast plug-in fuel cell range extender to improve the driving range of the electric vehicle. It can also be used as an independent vehicle-mounted civil 220V AC power supply and connected to the civil power grid when the vehicle is idle, supplemented by the power battery of the electric vehicle itself, to supply power to the power network, so as to alleviate the impact on the power network system caused by the peak power consumption during working hours during the day Impact, to realize the concept of vehicle-smart grid (Vehicle to Grid). The fuel cell range extender system can also be used as an emergency power supply to supply 220V AC to the outside when the vehicle travels to an area without grid power supply, and supplies power for some instruments and emergency facilities.

The system of the utility model uses a proton exchange fuel cell as a power source, and has many advantages such as high energy conversion efficiency, no electrolyte leakage, open electrochemical structure and uninterrupted continuous power supply as long as there is enough hydrogen supply, and is considered It is one of the ideal power sources for electric vehicles. It overcomes the limitations of the efficiency of traditional internal combustion engines due to the Carnot cycle, serious pollution, and the gradual depletion of fossil energy. It also makes up for the current power batteries for electric vehicles, such as lithium-ion secondary batteries, nickel-hydrogen batteries and lead-acid The charging time of the battery is long, there are many disadvantages such as the hidden danger of disposal and the small number of mileage provided, so this system is a new system with great development prospects.

The above description of the embodiments is for those of ordinary skill in the technical field to understand and apply the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative efforts. Therefore, the utility model is not limited to the embodiments here, and the improvements and modifications made by those skilled in the art according to the disclosure of the utility model should be within the protection scope of the utility model.

Claims (6)

1. fuel cell distance increasing unit system, it is characterized in that: it comprises fuel cell module, DC/DC module and master controller module, be connected by lead between fuel cell module and the DC/DC module, both are equipped with controller, by this controller and master controller module communication.

2. fuel cell distance increasing unit as claimed in claim 1 system, it is characterized in that: it also comprises the DC/AC module, and it is connected by lead respectively with the DC/DC module with fuel cell module, and it also has the controller with the master controller module communication.

3. fuel cell distance increasing unit as claimed in claim 1 system is characterized in that: described fuel cell module comprises hydrogen storage and conveying system, fuel cell pile, and its chemical energy with hydrogen and oxygen is converted into electric energy and imports as the energy.

4. fuel cell distance increasing unit as claimed in claim 1 system, it is characterized in that: the input voltage range of described DC/DC module comprises the scope of fuel cell output voltage fluctuation, and rated power is greater than the power output that equals fuel cell, and its output voltage is determined by the voltage of the power bus in the electric motor car.

5. fuel cell distance increasing unit as claimed in claim 1 system is characterized in that: described master controller module is obtained the power output of system, peak power output, failure diagnosis and each module data uploading to entire car controller of the current system of notice entire car controller by the CAN bus from the outside.

6. fuel cell distance increasing unit as claimed in claim 2 system is characterized in that: described DC/AC module is converted into the direct current energy of fuel cell output the alternating current of 220V.

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