CN209833375U

CN209833375U - Hybrid power tractor

Info

Publication number: CN209833375U
Application number: CN201821697251.XU
Authority: CN
Inventors: 宋庆国; 王锐; 徐森林; 徐鹏
Original assignee: FJ Dynamics Technology Co Ltd
Current assignee: FJ Dynamics Technology Co Ltd
Priority date: 2018-10-18
Filing date: 2018-10-18
Publication date: 2019-12-24
Anticipated expiration: 2028-10-18

Abstract

The utility model discloses a hybrid tractor, wherein the hybrid tractor comprises a main body; a power system, wherein said power system comprises a battery pack and a fuel cell stack, wherein said fuel cell stack is electrically connected to said battery pack and adapted to charge said battery pack, and said fuel cell stack is capable of charging said battery pack during travel; and an electric motor, said storage battery and said fuel cell stack electrically connecting said fuel cell stack in parallel, said electric motor having a plurality of power modes, different power modes in which said fuel cell stack charges said storage battery differently; and a tractor control system disposed on the main body, the tractor control system being controllably connected to the power system, and the tractor control system controlling the fuel cell stack to charge the battery pack.

Description

Hybrid power tractor

Technical Field

The utility model relates to the field of agricultural machinery, especially, relate to a hybrid tractor, be suitable for and provide power for this hybrid tractor.

Background

Currently, the agricultural field tends to be mechanized, especially in large-area plains and other areas, and multiple tractors are usually operated simultaneously to harvest or sow crops. However, the demands of agricultural machinery on environment and resources are increasing day by day, most of the agricultural machinery adopts a traditional power system, namely diesel oil or gasoline and the like, and the research on novel energy-saving agricultural machinery in China is relatively lagged.

Hybrid power has been used relatively widely in the field of household automobiles, hybrid gasoline-electric and pure electric vehicles are widely used in the market, but the application in the field of agricultural machinery is still insufficient. Besides, the hybrid electric vehicle mainly enables the engine to achieve the optimal use working condition through braking energy recovery and reutilization and through a control strategy, so that energy conservation and emission reduction are achieved, and the same control strategy is not suitable for agricultural machinery. Agricultural machines, such as tractors, are generally braked little during operation and are usually stopped after a single start until operation is complete

Moreover, the application of the current hybrid power is limited to the power superposition of a simple electric device and a traditional power device, the operation intensity can not be adjusted according to different working conditions, and the hybrid power is always driven by the traditional power.

It should be noted that what is important for hybrid power is how to charge and how to charge during traveling, and hybrid power is generally charged when the vehicle is stopped at present, but the charge supplement during traveling is difficult to realize.

Therefore, the utility model provides a charging device and charging method's of multiple hybrid tractor solution.

Disclosure of Invention

An object of the utility model is to provide a hybrid tractor, this charging device are suitable for the incessant charging in this hybrid tractor marchs.

An object of the utility model is to provide a hybrid tractor, the battery capacity of a storage battery is less than a predetermined electric quantity threshold value, and this charging device charges for this storage battery through a fuel cell group.

An object of the utility model is to provide a hybrid tractor, when this fuel cell group charges for this storage battery, this fuel cell group is continuously for this hybrid tractor energy supply.

An object of the utility model is to provide a hybrid tractor, this fuel container of this fuel cell group is less than a predetermined capacity threshold value, and this charging device suggestion operator replenishes the fuel of this fuel container.

An object of the utility model is to provide a hybrid tractor, this charging device provide a control module, and this fuel cell group of this control module control is when to this storage battery charging.

An object of the utility model is to provide a hybrid tractor, this charging device provide a charge switch, and this charge switch carries out this fuel cell group and charges to this storage battery.

An object of the utility model is to provide a hybrid tractor, this charging device provide a battery power detection module, and this battery power detection module detects this storage battery's battery capacity.

An object of the utility model is to provide a hybrid tractor, this charging device provide a fuel container capacity detection module, and this fuel container capacity detection module detects this fuel container's fuel capacity.

According to an aspect of the utility model, the utility model provides a hybrid tractor, include:

a main body;

a power system disposed on the main body, wherein the power system comprises:

a battery pack disposed on the main body;

a fuel cell stack disposed on said main body, wherein said fuel cell stack is electrically connected to said battery pack and adapted to charge said battery pack, and said fuel cell stack is capable of charging said battery pack during driving; and

an electric motor, said battery pack and said fuel cell stack being electrically connected in parallel to said fuel cell stack, said electric motor having a plurality of energization modes, different energization modes in which said fuel cell stack charges said battery pack differently; and

a tractor control system disposed on said main body, said tractor control system being controllably connected to said power system, and said tractor control system controlling said fuel cell stack to charge said battery pack.

According to an embodiment of the present invention, the tractor control system comprises:

the transmission system is connected with the power system to transmit power;

the driving system is arranged at the lower part of the main body, and the transmission system is connected with the driving system to transmit power so as to be suitable for driving the hybrid tractor to run; and

an operating system disposed on the upper portion of the main body, the operating system being controllably connected to the power system, the transmission system, and the drive system, and the operating system controlling the fuel cell stack to charge the battery pack.

According to an embodiment of the present invention, the operating system includes a charging device, the charging device communicatively connects the storage battery pack and the fuel cell stack, and the fuel cell stack can be controlled by the charging device to charge the storage battery pack.

According to an embodiment of the present invention, the fuel cell stack includes:

a fuel passage;

an oxidant channel;

a reaction chamber, wherein the fuel channel and the oxidant channel are in communication with the reaction chamber such that the reaction chamber is capable of receiving a fuel and an oxidant; and

a fuel container, wherein the fuel container stores a certain amount of the fuel, and the fuel container is communicated with the reaction chamber through the fuel passage.

According to the utility model discloses an embodiment, charging device further includes:

a storage battery electric quantity detection module;

a fuel container capacity detection module; and

a control module, wherein said control module is communicatively coupled to said battery pack charge detection module and said fuel container capacity detection module, and wherein said control module receives and processes signals detected by said battery pack charge detection module and said fuel container capacity detection module.

According to the utility model discloses an embodiment, charging device further includes a battery level sensor, battery level detection module communicatingly connects the battery level sensor, and the battery level sensor is set up in the storage battery, and generate a quantity signal, the battery level sensor will the quantity signal transmission arrives battery level detection module and then transmit to control module.

According to an embodiment of the present invention, the charging device further comprises a capacity sensor, the fuel container capacity detection module is communicatively connected to the capacity sensor, and the capacity sensor is disposed in the fuel container and generates a capacity signal, the capacity sensor transmits the capacity signal to the fuel container capacity detection module and then to the control module.

According to an embodiment of the present invention, the charging device further comprises a console and a charging switch, the console controllably connects the charging switch, the charging switch is disposed on the battery pack and the charging circuit of the fuel cell pack, wherein the console communicatively connects the control module.

According to the utility model discloses an embodiment, storage battery has a predetermined electric quantity threshold value, works as storage battery's electric quantity is less than or equal to predetermined electric quantity threshold value, at this moment, the electric quantity sensor generates the electric quantity signal passes through battery electric quantity detection module transmits control module, and handle and generate a control signal in the control module, and then pass through the control cabinet will control signal transmits the charge switch, the charge operation of switch-on is carried out to the charge switch, makes fuel cell group can to storage battery charges.

According to an embodiment of the present invention, when the storage battery pack is in a charged state, the power supply circuit between the storage battery pack and the motor is cut off.

According to the utility model discloses an embodiment storage battery with be provided with an on-off switch on the supply circuit between the motor, wherein the control cabinet is controllable to be connected on-off switch makes the control cabinet is in control when the charging operation of switch-on is carried out to the charging switch, control on-off switch carries out the operation of cutting off.

According to an embodiment of the present invention, the fuel container of the fuel cell stack has a predetermined capacity threshold, when the capacity of the fuel container is greater than the predetermined capacity threshold, at this time, the capacity signal generated by the capacity sensor is transmitted to the control module through the fuel container detection module, and the control module receives and processes the capacity signal, and allows the fuel cell stack to perform the charging operation through the console.

According to an embodiment of the present invention, the fuel cell stack further comprises a booster controllably connected to the reaction chamber, so that the booster can control the magnitude of the voltage generated by the reaction of the reaction chamber, and is adapted to supply power to the motor and charge the battery pack.

According to the utility model discloses an embodiment, fuel cell group still includes a power coupling device, the motor electricity is connected power coupling device, power coupling device connects with coupling transmission system, and then converts electric energy into power transmission to transmission system.

According to an embodiment of the present invention, the fuel cell stack further comprises a negative pressure generating device, the negative pressure generating device is disposed in the reaction chamber, so that the reaction chamber generates a negative pressure, thereby guiding the fuel and the oxidant to enter the reaction chamber.

According to an embodiment of the present invention, the charging device further comprises an information prompting unit, wherein the control module is communicatively connected to the information prompting unit, so that the battery capacity detection module and the signal detected by the fuel container capacity detection module are displayed by the control module to receive the detected signal to the information prompting unit.

According to another aspect of the present invention, the present invention further provides a charging method, wherein the charging method comprises the following steps:

(a) receiving a capacity signal, judging whether the capacity signal is larger than the preset capacity threshold value, if so, entering the next step, and if not, restarting the step (a);

(b) receiving an electric quantity signal, judging the electric quantity signal, and if the electric quantity signal is less than or equal to the preset electric quantity threshold value, controlling the charging switch to be communicated with the fuel cell set and a charging circuit of the storage battery set by the control module so that the fuel cell set charges the storage battery set; if the power is larger than the preset power threshold, returning to the step (a); and

(c) and receiving an electric quantity signal, judging the electric quantity signal, and if the electric quantity signal is equal to the total electric quantity of the storage battery pack, controlling the charging switch to cut off the fuel battery pack and a charging circuit of the storage battery pack by the control module so that the fuel battery pack stops charging the storage battery pack.

According to an embodiment of the present invention, the step (b) further comprises the steps of:

(b.1) providing a storage battery electric quantity detection module and receiving an electric quantity signal generated by an electric quantity sensor;

(b.2) transmitting the electric quantity signal to a control module, wherein the control module judges whether the electric quantity signal is greater than a preset electric quantity threshold value;

(b.3) if yes, generating a charging instruction, transmitting the charging instruction to a console through the control module, controlling a charging switch to execute the charging instruction and completing the operation of connecting a fuel cell pack and a charging circuit of a storage battery pack; and

(b.4) if not, returning to the step (a).

According to an embodiment of the present invention, the volume signal of step (a) is generated by a volume sensor and received by a fuel container volume detection module.

According to the utility model discloses an embodiment, in step (c), an on-off switch is provided, on-off switch is set up in the supply circuit of storage battery to a motor to through a control module control on-off switch carries out and cuts off storage battery arrives the operation of the supply circuit of motor.

Drawings

Fig. 1 is an overall schematic view of the hybrid tractor of the present invention.

Fig. 2 is a schematic diagram of a power system of the hybrid tractor of the present invention.

Fig. 3 is a schematic diagram of the charging device and the power system of the hybrid tractor according to the present invention.

Fig. 4 is a schematic flow chart of a charging method of the hybrid tractor according to the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purpose of limitation.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

As shown in fig. 1, the utility model provides a whole schematic diagram of a hybrid tractor, wherein the hybrid tractor 10 adopts different working modes to deal with in the face of different working conditions. Generally, the hybrid tractor 10 is subject to several operating conditions:

first, in a steady driving state, when the hybrid tractor 10 is driving on a level road or in a relatively level field, the hybrid tractor 10 only needs to overcome the resistance of the road surface, and the required power is required to maintain the driving of the hybrid tractor 10.

Secondly, in the working state, the hybrid tractor 10 is required to travel through the field and simultaneously perform operations such as cultivation or harvesting, and in this case, the hybrid tractor 10 is required to overcome the resistance of the ground, which is often uneven, and simultaneously perform operations such as cultivation or harvesting, and the required power is much greater than that in the steady running state.

And in the second operating condition, the hybrid tractor 10 may be further subdivided into a strong operating state and a weak operating state. To better operate the hybrid tractor 10, the hybrid tractor 10 has the following modes of operation, according to the several operating conditions described above: 1. an unloaded mode; 2. a strong operation mode; 3. in the weak operation mode, an operator can perform manual switching at any time, and automatic switching can be completed through an automatic induction system of the hybrid tractor 10.

In this embodiment of the present invention, the hybrid tractor 10 includes a main body 11, a power system 12, a driving system 14, a transmission system 13 and an operating system 15, wherein the power system 12 is disposed in the main body 11, and the main body 11 is an integral frame of the hybrid tractor 10. The driving system 14 is disposed under the main body 11 to drive the main body 11 to move.

The power system 12 is controllably connected to the transmission system 13 such that the power system 12 provides a source of power for the transmission system 13. Further, the transmission system 13 is mechanically connected to the driving system 14, so that the transmission system 13 drives the driving system 14, and the driving system 14 drives the hybrid tractor 10. Moreover, the transmission system 13 is mechanically connected to the operating system 15, so that the transmission system 13 drives the operating system 15, and the operating system 15 performs corresponding operations of the hybrid tractor 10.

In this embodiment of the present invention, more specifically, the driving system 14 is provided at the lower portion of the main body 11 to perform a traveling function; the power system 12 and the driving system 14 are disposed at an upper portion of the main body 11, and may be disposed adjacently; the operating system 15 is electrically connected to the power system 12 on one hand, so that the power system 12 provides power to the operating system 15, and the operating system 15 is controllably connected to the power system 12, so that the operating system 15 controls the power system to implement power change; on the other hand, through the mechanical connection between the transmission system 13 and the operating system 15, the operating system 15 can complete corresponding operations through the power provided by the transmission system 13; the transmission system 13 is also mechanically connected to the drive system 14 and makes the drive system 14 obtain power for driving.

Since tractors are generally used in agricultural fields, the main body 11 includes a main stand 111, a cockpit 112 and a work bay 113, wherein the cockpit 112 is disposed inside the main body stand 111 and is adapted to be driven by an operator of the hybrid tractor 10; the work bay 113 is provided in the main body frame 111, wherein a part of the operating system 15 is provided in the work bay 113, adapted to perform work operations of the hybrid tractor 10, and another part of the operating system 15 is provided in the cab 112, adapted to be driven by an operator and to manipulate and switch work modes.

It should be noted that, in another different embodiment, the main body 11 has a main support 111, which supports and protects all the structures. In another embodiment, the main body 11A includes a main support 111 and a cabin space 113; in another embodiment, the main body 11B includes a main support 111 and a cockpit 112.

In the present embodiment, the power system 12 is provided at the rear of the main stand 111, and the work bay 113 is provided at the front of the main stand 111. The driving system 14 is provided at a lower portion of the main stand 111. The transmission system 13 is disposed in the main stand 111. At this time, the hybrid tractor 10 is in a rear drive.

It will be appreciated that the power system 12 is disposed at the front of the main frame 111 and at the side of the working bay 113, with the hybrid tractor 10 being front-drive.

As shown in fig. 2, the hybrid power of the hybrid tractor 10 of the present invention is not the oil-electric hybrid power of most existing vehicles, but the hybrid power of a fuel cell and a battery. The hybrid power of the fuel cell and the battery has advantages in that it is not necessary to consume fuel energy and avoid harmful gas generated, and the working efficiency is improved.

The power system 12 includes a battery pack 121, a fuel cell stack 122, a motor 123, and a power coupling device 124, wherein the battery pack 121 and the fuel cell stack 122 are electrically connected in series with the motor 123 such that the motor 123 provides power through the battery pack 121 and the fuel cell stack 122.

In this process, the motor 123 has three power modes:

first, only the accumulator group 121 is required to provide power to the motor 123;

second, only the fuel cell stack 122 is required to provide power to the motor 123;

third, the battery pack 121 and the fuel cell stack 122 are required to provide power. The above three power supply modes can be switched by the control of the operating system 15.

Specifically, the motor 123 is mechanically connected to the power coupling device 124, so that the power of the motor 124 ensures normal power output through the power coupling device 124. The power coupling device 124 is capable of adjusting the power source it receives in different power modes, and the power coupling device 124 mixes the power outputs of the battery pack 121 and the fuel cell stack 122 in a third power mode.

It should be noted that the current required by the electric motor 123 is ac, and the electricity generated by the battery pack 121 and the fuel cell stack 122 is dc, so that a current control system 1230 is provided in the electric motor 123, and the dc power from the fuel cell stack 122 and the battery pack 121 is received by the current control system 1230, and is converted into ac power.

The storage battery pack 121 and the fuel cell pack 122 are disposed in the main body frame 111, the storage battery pack 121 has an external power interface 1210, and the external power interface 1210 is electrically connected to an external power source P to charge the storage battery pack 121 by connecting to the external power source P. The fuel cell stack 122 has a fuel channel 21 and an oxidant channel 22 and a reaction chamber 23, wherein the fuel inlet 21 is connected to fuel, the oxidant inlet 22 is connected to oxidant, and the fuel channel 21 and the oxidant channel 22 are connected to the reaction chamber 23 so that the oxidant and the fuel react in the reaction chamber 23 to generate electric current, so as to supply the fuel cell stack 122 with electric power.

Also, the fuel cell stack 122 has a booster 25, the booster 25 being electrically connected to the reaction chamber 23, so that the voltage generated by the reaction of the reaction chamber 23 of the fuel cell stack 122 is boosted by the booster 25 to be suitable for energizing the motor 123. Note that the secondary battery pack 121 does not need to be boosted by the booster.

It is worth mentioning that the mass and volume of the battery pack 121 itself are such that the relative requirement occupies a certain volume and needs to be directly provided on the main frame 111 of the hybrid tractor 10, and the fuel cell stack 122 further includes a fuel container 24, and since the oxidant of the fuel cell stack 122 is directly available through the outside air, there is no need to additionally occupy the volume of the hybrid tractor 10 to provide an oxidant container, but a certain volume required for the fuel container 24 is also provided in the hybrid tractor 10.

At this time, the battery pack 121 and the fuel cell stack 122 may be variously arranged such that the structure of the entire tractor is balanced and the operation is convenient.

The utility model provides a hybrid of this hybrid tractor 10 derives from the combination of this fuel cell group 122 and this storage battery 121, and wherein the efficiency that this fuel cell group 122 changed is high to the power of output is big, can replace the power that original power provided in most of the time. The fuel cell stack 122 has a disadvantage in that it cannot store electric energy well; on the other hand, the fuel cell stack 122 generates a large amount of heat in a long-term operation.

Therefore, the fuel cell stack 122 and the battery pack 121 together complete the power supply for the motor 123, and the battery pack 121 can store part of the electric energy and provide a power source for the hybrid tractor 10 when the fuel in the fuel container 24 of the fuel cell stack 122 is consumed to a certain extent; on the other hand, the fuel cell stack 122 may also charge the battery pack 121 so that the power of the hybrid tractor 10 is always supplied.

The fuel required by the fuel cell stack 122 is sourced from the fuel container 24, the oxidant of the fuel cell stack 122 is sourced directly from the ambient air, and the heat generated by the fuel cell stack 122 is directly rejected to the external environment.

It should be noted that the electric motor 123 and the power coupling device 124 of the power system 12 of the hybrid tractor 10 are disposed in the main frame in cooperation with the battery pack 121 and the fuel cell pack 122, so that the electric motor 123 is disposed on the main frame 111, and is electrically connected to the electric motor 123 at both the battery pack 121 and the fuel cell pack 122.

In the embodiment of the present invention, the battery pack 121 can be configured as a lithium battery pack, which is externally connected to an external power source P, and can be directly charged, or adapted to the lithium battery pack through an adaptive charger. In embodiments of the present invention, the fuel cell stack 122 may be configured as an oxy-hydrogen fuel cell and the fuel container 24 may be configured as a hydrogen tank. It will be understood by those skilled in the art that the battery pack 121 may also be configured as a lead battery pack or the like having a battery pack for storing electric energy; the fuel cell stack 122 may also be a stack configured to generate electricity by fuel driving, such as a methanol fuel cell stack.

According to the above embodiment of the present invention, the fuel cell stack 122 and the battery stack 121 cooperatively operate as the power supply of the hybrid tractor 10.

Therefore, as shown in fig. 3, in the embodiment of the present invention, a charging device 30 is provided, the charging device 30 electrically connects the electric storage device 121 and the fuel cell stack 122, so that the fuel cell stack 122 can charge the battery pack 121, and the charging device 30 can directly connect the battery pack 121 and the external power source P.

The charging device 30 comprises a battery capacity detection module 31 and a fuel container capacity detection module 32, wherein the battery capacity detection module 31 is communicatively connected to the battery pack 121 for detecting the battery capacity of the battery pack 121; the fuel container capacity detection module 32 is communicatively coupled to the fuel cell stack 122 for detecting the cell capacity of the fuel cell stack 122.

In the embodiment of the present invention, the charging device 30 further includes a control module 33 and a console 330, wherein the control module 33 is communicatively connected to the console 330, when the electric quantity of the battery pack 121 is less than or equal to the predetermined electric quantity threshold, at this time, the electric quantity signal generated by the electric quantity sensor 310 is transmitted to the control module 33 through the battery electric quantity detection module 31, and is processed and generated in the control module 33 to generate a control signal, and then the control signal is transmitted to the charging switch 340 through the console 330, and the charging switch 340 executes the turned-on charging operation, so that the fuel cell pack 122 can be charged to the battery pack 121.

When the battery pack 121 is being charged, the power supply circuit between the battery pack 121 and the motor 123 is cut off. Therefore, an on-off switch 331 is provided on a power supply circuit between the secondary battery pack 121 and the motor 123, wherein the console 330 is controllably connected to the on-off switch 331, so that the console 330 controls the on-off switch 331 to perform an off operation while controlling the charging switch 340 to perform an on charging operation.

It should be noted that the fuel container 24 of the fuel cell stack 122 has a predetermined capacity threshold, when the capacity of the fuel container 24 is greater than the predetermined capacity threshold, the capacity signal generated by the capacity sensor 320 is transmitted to the control module 33 through the fuel container detection module 32, and the control module 33 receives and processes the capacity signal and allows the fuel cell stack 122 to perform the charging operation through the console 330.

The power system 12 is drivingly connected to the transmission system 13, and the transmission system 13 is mechanically connected to the drive system 14 and the operating system 15, respectively. In the operating state, the power system 12 needs to be in the state of power supply all the time, that is, the fuel cell stack 122 and the battery pack 121 of the hybrid tractor 10 need to be in the state of power supply all the time.

Specifically, the fuel for the fuel cell stack 122 is from the fuel container 24 and the oxidant is from the outside environment. In general, the fuel cell stack 122 does not need to consider the power failure, and the capacity of the fuel container 24 is considered.

Therefore, the fuel container capacity detecting module 32 detects the remaining capacity of the fuel container 24, receives a data message, and transmits the data message to the control module 33, the control module 33 includes a message prompting unit 331, when the fuel container capacity detecting module 32 detects that the fuel container 24 is smaller than a predetermined capacity threshold, the fuel container capacity detecting module 32 sends a data message to the control module 33, the control module 33 further processes the data message, and generates a prompting instruction, and sends the prompting instruction to the message prompting unit 331 to prompt the operator to return or timely replace the fuel container 24, and complete the overall replacement of the fuel container 24 or the fuel replacement thereof, and then the operation can be continued.

As shown in fig. 4, the fuel cell stack 122 needs to supply power to the transmission system 13 on one hand, and the fuel cell stack 122 needs to supply power to the battery pack 121 on the other hand, so as to avoid power failure of the battery pack 121 during driving.

Therefore, the battery level detecting module 31 detects the remaining level of the battery pack 121, receives a level signal, and transmits the data message to the control module 33, when the battery level detecting module 31 detects that the battery pack 121 is smaller than a predetermined level threshold, the battery level detecting module 31 sends a data message to the control module 33, and the control module 33 further processes the data message, generates a prompt instruction, and sends the prompt instruction to the information prompting unit 331, so as to prompt an operator to charge the battery pack 121.

Further, as shown in fig. 3, the charging device 30 further provides a charging switch 340, the charging switch 340 is electrically connected to the battery pack 121 and the fuel cell pack 122, and the control module 33 is controllably connected to the charging switch 340, so that the fuel cell pack 122 connects the battery pack 121 and provides electric energy for the battery pack 121 when the prompt command is sent to the information prompt unit 331.

In a specific embodiment of the present invention, the battery capacity detecting module 31 and the fuel container capacity detecting module 32 are both configured as a sensor, the information prompting unit 331 is configured as a display screen interface, and the signal detected by the sensor is transmitted to the display screen interface and displayed.

Preferably, when the remaining capacity of the battery pack 121 is detected by the battery capacity detection module 31 and the predetermined capacity threshold is 10% of the capacity of the battery pack 121 as a whole, the battery capacity detection module 31 sends a data message to the control module 33, the control module 33 further processes the data message and generates a charging command, and the charging switch 340 executes the charging command, so that the fuel cell pack 122 charges the battery pack 121.

It is understood that the predetermined threshold value of the electric quantity may be set by an operator according to practical situations, and is not limited to 10%, and may also be 15%, 20%, 25%, and the like.

The electric motor 123 cooperates with the above-described charging method in three power modes, wherein in the first power mode the electric motor 123 is powered only by the battery pack 121. That is, the fuel cell stack 122 charges only the battery pack 121 at this time, the above-described charging method of the battery pack 121 is applied, and the charging method of the battery pack 121 is started when the battery capacity of the battery pack 121 is consumed to the predetermined electric quantity threshold. So that the battery pack 121 receives charging input from the fuel cell stack 122 on the one hand, and the battery pack 121 outputs current to power the motor 123 on the other hand.

In the second power mode, the motor 123 is powered only by the fuel cell stack 122, and in this case, by applying the charging method of the fuel cell stack 122, the fuel stored in the fuel container 24 of the fuel cell stack 122 is generally sufficient for one full operation of the hybrid tractor 10.

In a third power mode, the electric motor 123 is supplied by the fuel cell stack 122 and the battery pack 121, and the hybrid tractor 10 is continuously operating at high power. In this case, the above-described charging methods of the secondary battery 121 and the fuel cell stack 122 are applied simultaneously.

It is worth mentioning that in the first power mode, i.e. the battery pack 121 alone powers the electric motor 123. At this time, the required conditions are: the charge of the battery pack 121 is greater than the predetermined charge threshold. The first energy supply mode is generally suitable for the situation that the electric energy consumption is small, such as flat ground or no load.

In the second power mode, that is, the fuel cell stack 122 alone powers the motor 123. At this time, the required conditions are: the capacity of the fuel container 24 of the fuel cell stack 122 is greater than the predetermined capacity threshold. This power mode is generally suitable for smooth work conditions such as sowing and harvesting in a smooth condition.

In a third power mode, that is, the fuel cell stack 122 and the battery pack 121 combine to power the motor 123. At this time, the required conditions are: the charge of the battery pack 121 is greater than the predetermined charge threshold, while the capacity of the fuel container 24 of the fuel cell stack 122 is greater than the predetermined capacity threshold. Such an energizing mode is generally suitable for starting and accelerating situations, such as during uphill grades or on ground with high resistance.

It is worth mentioning that the fuel cell stack 122 can charge the battery pack 121, and also can supply power to the motor 123. The secondary battery 121 only allows one choice between charging and discharging, that is, in the case where the fuel cell stack 122 charges the secondary battery 121, the secondary battery 121 cannot complete the power supply to the motor 123.

Therefore, the control module 33 receives the power signals detected by the battery power detection module 31 and the fuel container capacity detection module 32, and determines whether the power signal is greater than the predetermined power threshold and is full, wherein when the power signal detected by the battery pack 121 is detected to be less than or equal to the predetermined power threshold, the control module 33 receives the power signal at this time, and then controls the charge switch 340 to turn on the charge circuits of the fuel cell pack 122 and the storage battery pack 121, thereby completing the charging of the battery pack 121.

Further, when the detected electric quantity signal of the storage battery pack 121 is determined by the control module 33 to be equal to the full electric quantity, that is, is detected to be full, the control module 33 receives the electric quantity signal at this time, and then controls the charging switch 340 to cut off the charging circuits of the fuel cell pack 122 and the storage battery pack 121, so as to disconnect the charging of the storage battery pack 121.

It should be noted that the battery level detection module 31 detects the level of the battery pack 121 between the predetermined threshold level and the full level, and there are two cases, one is that the battery pack 121 is in a charged state, and the other is that the battery pack 121 is in an uncharged state.

It should be noted that when the electric quantity of the battery pack 121 detected by the battery electric quantity detection module 31 is between the predetermined electric quantity threshold and the full electric quantity, if the hybrid tractor 10 needs to be in the third power supply mode, that is, the battery pack 121 and the fuel cell pack 122 are supplied with power in a linkage manner. At this time, if the secondary battery pack 121 is still in a charged state, the control module 33 controls the charge switch 340 to cut off the charge circuit of the fuel cell stack 122 and the secondary battery pack 121, and the secondary battery pack 121 supplies power to the motor 123.

Correspondingly, when the charge of the battery pack 121 is less than or equal to the predetermined charge threshold, the battery pack 121 cannot supply power to enable the hybrid tractor 10 to be in the third power supply mode.

According to the above-mentioned power supplying process of the fuel cell stack 122 and the battery pack 121, the present invention further provides a charging method during the driving process of the hybrid tractor 10.

As shown in fig. 4, according to the method in the different energy supply modes, the present invention further provides a charging method, which includes the following steps:

step a: receiving a capacity signal, and judging whether the capacity signal is greater than the preset capacity threshold value, if so, entering the next step, otherwise, restarting the step a;

step b: receiving an electric quantity signal, and determining the electric quantity signal, if the electric quantity signal is less than or equal to the predetermined electric quantity threshold, the control module 33 controls the charging switch 340 to connect the fuel cell set 122 and the charging circuit of the storage battery set 121, so that the fuel cell set 122 charges the storage battery set 121; if the preset electric quantity is larger than the preset electric quantity threshold value, returning to the step a;

step c: receiving an electric quantity signal, determining the electric quantity signal, and if the electric quantity signal is equal to the total electric quantity of the storage battery pack 121, the control module 33 controls the charging switch 340 to cut off the charging circuits of the fuel cell pack 122 and the storage battery pack 121, so that the fuel cell pack 122 stops charging the storage battery pack 121.

In the above charging method, the step b further includes the steps of:

step b1, providing a battery capacity detection module 31, and receiving a capacity signal generated by a capacity sensor 310;

step b2, transmitting the electric quantity signal to a control module 33, wherein the control module 33 determines whether the electric quantity signal is greater than a predetermined electric quantity threshold;

b3, if yes, generating a charging command, transmitting the charging command to a console 330 through the control module 33, controlling a charging switch 340 to execute the charging command and completing the operation of connecting the charging circuit of a fuel cell set 122 and a storage battery set 121; and

and b4, if not, returning to the step a.

In conjunction with the above-described structure of the hybrid tractor 10, the volume signal in step a is generated by a volume sensor 320 and received by a fuel container volume detection module 32. And in step c, an on-off switch 331 is provided, the on-off switch 331 is provided in the power supply circuit of the secondary battery pack 121 to a motor 123, and the on-off switch 331 is controlled by a control module 33 to perform an operation of cutting off the power supply circuit of the secondary battery pack 121 to the motor 123.

Further, when the hybrid tractor 10 needs to change its driving mode, its corresponding power supply mode is also changed accordingly. Specifically, it is understood that the control module 33 receives a control signal, and the control module 33 determines whether the control signal belongs to the driving mode corresponding to the first, second, and third power supply modes, and controllably connects the power supply circuit of the battery pack 121 and the motor 123, while disconnecting the charging circuit of the fuel cell stack 122 and the battery pack 121. It should be noted that the above operation may be between step b and step c, or may be after step d.

The method as described above, wherein in step a, the volume signal is obtained by the fuel container detection module 32 detecting the fuel container 24.

In step d, the control signal is generated by the control module 33. Specifically, the control module 33 controllably connects the fuel cell stack 122 and the battery pack 121 to the power supply circuit of the motor 123, wherein the control module 33 is capable of controlling the power supply modes of the fuel cell stack 122 and the battery pack 121.

That is, in the first power mode, the control module 33 receives and processes a first control signal and switches off the power supply circuit to the fuel cell stack 122 and the motor 123 and switches on the power supply circuit to the battery pack 121 and the motor 123, so that the motor 123 can only be powered by the battery pack 121. In a second power mode, the control module 33 receives and processes a second control signal and switches off the power supply circuit to the battery pack 121 and the motor 123 and switches on the power supply circuit to the fuel cell stack 122 and the motor 123 so that the motor 123 can only be powered by the fuel cell stack 122. In a third power mode, the control module 33 generates a third control signal and turns on the power supply circuits of the fuel cell stack 122 and the battery pack 121 and the motor 123, so that the fuel cell stack 122 and the battery pack 121 are powered jointly.

In the present invention, the fuel cell stack 122 and the battery stack 121 have a certain ratio, and in the third energy supply mode, the condition of the combined power supply is also included.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments, and any variations or modifications may be made without departing from the principles of the present invention.

Claims

1. A hybrid tractor, comprising:

a main body;

a power system disposed on the main body, wherein the power system comprises:

a battery pack disposed on the main body;

2. The hybrid tractor of claim 1, wherein the tractor control system comprises:

the transmission system is connected with the power system to transmit power;

3. The hybrid tractor as defined by claim 2 wherein the operating system includes a charging device communicatively connecting the battery pack and the fuel cell stack and by which the fuel cell stack can be controlled to charge the battery pack.

4. The hybrid tractor of claim 1, wherein the fuel cell stack comprises:

a fuel passage;

an oxidant channel;

5. The hybrid tractor according to claim 3, wherein the charging device further comprises:

a storage battery electric quantity detection module;

a fuel container capacity detection module; and

a control module, wherein said control module is communicatively coupled to said battery pack charge detection module and said fuel container capacity detection module, and said control module receives and processes signals detected by said battery pack charge detection module and said fuel container capacity detection module.

6. The hybrid tractor as defined by claim 5 wherein the charging device further includes a charge sensor, the battery charge detection module is communicatively coupled to the charge sensor and the charge sensor is disposed in the battery pack and generates a charge signal, the charge sensor transmits the charge signal to the battery charge detection module and to the control module.

7. The hybrid tractor as defined by claim 6 wherein the charging device further includes a capacity sensor, the fuel container capacity detection module is communicatively coupled to the capacity sensor and the capacity sensor is disposed in the fuel container and generates a capacity signal, the capacity sensor transmitting the capacity signal to the fuel container capacity detection module and to the control module.

8. The hybrid tractor as defined by claim 7 wherein the charging device further comprises a console and a charge switch, the console being controllably connected to the charge switch, the charge switch being disposed in a charging circuit of the battery pack and the fuel cell pack, wherein the console is communicatively connected to the control module.

9. The hybrid tractor as defined by claim 8 wherein the battery pack has a predetermined charge threshold, and when the charge of the battery pack is less than or equal to the predetermined charge threshold, the charge signal generated by the charge sensor is transmitted to the control module via the battery charge detection module, processed in the control module and generated as a control signal, which is transmitted to the charge switch via the console, the charge switch performing an on-state charging operation so that the fuel cell stack can charge the battery pack.

10. The hybrid tractor of claim 9, wherein a power circuit between the battery pack and the motor is cut off when the battery pack is in a charged condition.

11. The hybrid tractor as defined by claim 10 wherein an on-off switch is provided on a power supply circuit between the battery pack and the motor, wherein the console is controllably connected to the on-off switch such that the console controls the on-off switch to perform an off operation while controlling the charging switch to perform an on charging operation.

12. The hybrid tractor as defined by claim 11 wherein the fuel container of the fuel cell stack has a predetermined capacity threshold, and when the capacity of the fuel container is greater than the predetermined capacity threshold, the capacity signal generated by the capacity sensor is transmitted to the control module by the fuel container detection module, and the control module receives and processes the capacity signal and allows the fuel cell stack to perform a charging operation via the console.

13. A hybrid tractor according to any one of claims 1 to 3, wherein the fuel cell stack includes a reaction chamber and a booster, the booster being controllably connected to the reaction chamber so that the booster can control the amount of voltage generated by the reaction chamber, and is adapted to supply power to the electric motor and charge the battery pack.

14. The hybrid tractor as defined by claim 4 wherein the fuel cell stack further includes a booster controllably connected to the reaction chamber such that the booster controls the amount of voltage generated by the reaction chamber and is adapted to power the electric motor and charge the battery pack.

15. A hybrid tractor according to any one of claims 5 to 12, wherein the fuel cell stack includes a reaction chamber and a booster, the booster being controllably connected to the reaction chamber so that the booster can control the amount of voltage generated by reaction of the reaction chamber, and is adapted to supply power to the electric motor and to charge the battery pack.

16. A hybrid tractor according to claim 2 or 3, wherein the fuel cell stack further comprises a power coupling device, the electric motor being electrically connected to the power coupling device, the power coupling device being coupled to the drive train to convert the electrical energy into power for transmission to the drive train.

17. A hybrid tractor according to any one of claims 4 to 12, wherein the fuel cell stack further comprises a power coupling device, wherein the tractor control system comprises a drive train connected to the drive train for transmitting power, wherein the electric motor is electrically connected to the power coupling device, and the power coupling device is coupled to the drive train for converting electrical energy into power for transmission to the drive train.

18. The hybrid tractor as defined by claim 4 wherein the fuel cell stack further includes a negative pressure generating device disposed in the reaction chamber to create a negative pressure in the reaction chamber to direct the fuel and the oxidant into the reaction chamber.

19. The hybrid tractor according to any one of claims 5 to 12, wherein the charging device further comprises an information presentation unit, wherein the control module is communicatively connected to the information presentation unit so that the signals detected by the battery charge amount detection module and the fuel pack capacity detection module are received and displayed on the information presentation unit by the control module.