阅读说明：本技术 并联式燃料电池和超级电容的能量管理方法及系统 (Energy management method and system for parallel fuel cell and super capacitor ) 是由 李正辉 郝义国 李昌泉 于 2020-12-17 设计创作，主要内容包括：本发明涉及新能源汽车技术领域,提供一种并联式燃料电池和超级电容的能量管理方法,包括步骤：S1：车辆启动；S2：整车控制器实时监测超级电容SOC值、加速踏板状态和制动踏板状态；S3：根据所述加速踏板状态和所述制动踏板状态,获得电机需求功率P-M-req；S4：根据所述电机需求功率P-M-req和所述超级电容SOC值,调整燃料电池输出功率和超级电容功率；S5：若车辆保持启动状态则返回步骤S2,否则结束流程。本发明实现系统功率的分配、制动能量的回收以及超级电容的充电等功能,更有利于功率分配模块整车空间的分配,同时保证整车能量的管理更加合理有序。(The invention relates to the technical field of new energy automobiles, and provides an energy management method for a parallel fuel cell and a super capacitor, which comprises the following steps: s1: starting the vehicle; s2: the vehicle control unit monitors the SOC value of the super capacitor, the state of an accelerator pedal and the state of a brake pedal in real time; s3: obtaining the required power P _ M _ req of the motor according to the state of the accelerator pedal and the state of the brake pedal; s4: adjusting the output power of a fuel cell and the power of a super capacitor according to the required power P _ M _ req of the motor and the SOC value of the super capacitor; s5: if the vehicle is kept in the start state, the process returns to step S2, otherwise, the process ends. The invention realizes the functions of system power distribution, braking energy recovery, super capacitor charging and the like, is more favorable for the distribution of the whole vehicle space of the power distribution module, and simultaneously ensures that the management of the whole vehicle energy is more reasonable and ordered.)

1. A method for managing the energy of a parallel fuel cell and a super capacitor is characterized by comprising the following steps:

s1: starting the vehicle;

s2: the vehicle control unit monitors the SOC value of the super capacitor, the state of an accelerator pedal and the state of a brake pedal in real time;

s3: obtaining the required power P _ M _ req of the motor according to the state of the accelerator pedal and the state of the brake pedal;

s4: adjusting the output power of a fuel cell and the power of a super capacitor according to the required power P _ M _ req of the motor and the SOC value of the super capacitor;

s5: if the vehicle is kept in the start state, the process returns to step S2, otherwise, the process ends.

2. A parallel fuel cell and supercapacitor energy management method according to claim 1, wherein step S3 specifically comprises:

if the accelerator pedal is trodden on; the motor required power P _ M _ req is a positive value, and the absolute value of the motor required power P _ M _ req is in direct proportion to the treading depth of the accelerator pedal;

if the brake pedal is trodden; the motor required power P _ M _ req is a negative value, and the absolute value of the motor required power P _ M _ req is in direct proportion to the treading depth of the brake pedal;

if the accelerator pedal is not trodden, the brake pedal is not trodden; the motor required power P _ M _ req is zero.

3. A parallel fuel cell and supercapacitor energy management method according to claim 1, wherein if the supercapacitor power is positive, it indicates that the supercapacitor is discharging; and if the power of the super capacitor is a negative value, indicating that the super capacitor is charged.

4. A parallel fuel cell and supercapacitor energy management method according to claim 1, wherein step S4 specifically comprises:

s41: judging the value of the required power P _ M _ req of the motor;

s42: if the required power P _ M _ req of the motor is zero, entering a first judgment process;

s43: if the required power P _ M _ req of the motor is a negative value, entering a second judgment process;

s44: and entering a third judgment process if the required power P _ M _ req of the motor is a positive value.

5. A parallel fuel cell and supercapacitor energy management method according to claim 4, wherein the first determining process specifically comprises:

judging the size of the SOC value of the super capacitor;

if the SOC value of the super capacitor is larger than or equal to the SOC preset maximum value SOC _ max; the output power of the fuel cell is adjusted to 0, and the power of the super capacitor is adjusted to 0;

if the SOC value of the super capacitor is smaller than the SOC preset maximum value SOC _ max; the fuel cell output power is adjusted to a super capacitor maximum charging power P _ sc _ maxcarge and the super capacitor power is adjusted to-P _ sc _ maxcarge.

6. A parallel fuel cell and supercapacitor energy management method according to claim 4, wherein the second decision flow is specifically:

judging the size of the SOC value of the super capacitor;

if the SOC value of the super capacitor is larger than or equal to the SOC preset maximum value SOC _ max; the output power of the fuel cell is adjusted to 0, and the power of the super capacitor is adjusted to 0;

if the SOC value of the super capacitor is smaller than the preset maximum SOC _ max of the super capacitor, judging whether the absolute value of the required power P _ M _ req of the motor is larger than or equal to the maximum charging power P _ sc _ maxcarge of the super capacitor; if yes, adjusting the output power of the fuel cell to be 0, and adjusting the power of the super capacitor to be-P _ sc _ maxcarge; if not, the output power of the fuel cell is adjusted to be 0, and the power of the super capacitor is adjusted to be-P _ M _ req.

7. A parallel fuel cell and supercapacitor energy management method according to claim 4, wherein the third determination process specifically comprises:

judging the magnitude of the required power P _ M _ req of the motor;

if the required power P _ M _ req of the motor is larger than the maximum value P _ fc _ max of the output power of the fuel cell, judging whether the SOC value of the super capacitor is smaller than or equal to the preset SOC minimum value SOC _ min of the super capacitor; if yes, adjusting the output power of the fuel cell to be the maximum value P _ fc _ max of the output power of the fuel cell, and adjusting the power of the super capacitor to be 0; if not, adjusting the output power of the fuel cell to the maximum value P _ fc _ max of the output power of the fuel cell, and adjusting the power of the super capacitor to the required power P _ M _ req of the motor-output power P _ fc of the fuel cell;

if the motor required power P _ M _ req is less than or equal to the maximum fuel cell output power value P _ fc _ max, the fourth determination process is entered.

8. A parallel fuel cell and supercapacitor energy management method according to claim 7, wherein the fourth determination process specifically comprises:

s441: judging the value of the required power P _ M _ req of the motor; if the required power P _ M _ req of the motor is greater than the minimum value P _ fc _ min of the output power of the fuel cell and is less than or equal to the maximum value P _ fc _ max of the output power of the fuel cell, the process proceeds to step S442; otherwise, go to step S444;

s442: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is larger than or equal to the maximum SOC value SOC _ max preset by the super capacitor, adjusting the output power of the fuel cell to be the minimum output power P _ fc _ min of the fuel cell, and adjusting the power of the super capacitor to be the required power P _ M _ req of the motor-output power P _ fc of the fuel cell; otherwise, go to step S443;

s443: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is larger than or equal to the SOC minimum value SOC _ min preset by the super capacitor, adjusting the output power of the fuel cell to be a first high-efficiency point P _ fc _ eff1 of the output power of the fuel cell, and adjusting the power of the super capacitor to be the required power P _ M _ req-output power P _ fc of the fuel cell; otherwise, the fuel cell output power is adjusted to a second high efficiency point P _ fc _ eff2 of the fuel cell output power, and the super capacitor power is adjusted to the motor required power P _ M _ req + the fuel cell output power P _ fc;

s444: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is greater than or equal to the preset SOC minimum value SOC _ min of the super capacitor, the step S445 is executed; otherwise, the output power of the fuel cell is adjusted to be the maximum charging power P _ sc _ maxcharge of the super capacitor and the required power P _ M _ req of the motor, and the power of the super capacitor is adjusted to be-P _ sc _ maxcharge;

s445: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is smaller than or equal to the maximum SOC value SOC _ max preset by the super capacitor, adjusting the output power of the fuel cell to be the required power P _ M _ req +10KW of the motor, and adjusting the power of the super capacitor to be-10 KW; otherwise, the output power of the fuel cell is adjusted to be 0, and the power of the super capacitor is adjusted to be the required power P _ M _ req of the motor.

9. A parallel fuel cell and supercapacitor energy management system, comprising: the system comprises a fuel cell system, a unidirectional DC, a bidirectional DC, a motor, a super capacitor and a vehicle control unit;

the vehicle control unit is electrically connected with the fuel cell system and the super capacitor;

the fuel cell system is electrically connected with the unidirectional DC; the super capacitor is electrically connected with the bidirectional DC; the unidirectional DC is electrically connected with the bidirectional DC and the motor.

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to an energy management method and system for a parallel fuel cell and a super capacitor.

Background

With the development of new energy automobile technology, a hybrid power system of a fuel cell and a super capacitor is generally adopted as a power source of the new energy automobile technology, and the technical problems of unreasonable energy distribution, excessive loss in the energy distribution process and disordered energy management of the capacity management method of the fuel cell and the super capacitor in the prior art exist.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention mainly aims to solve the technical problems of unreasonable energy distribution, excessive loss in the energy distribution process and disordered energy management in the capacity management method for adding the super capacitor to the fuel cell in the prior art.

In order to achieve the above object, the present invention provides an energy management method for a parallel fuel cell and a super capacitor, comprising the steps of:

s1: starting the vehicle;

s2: the vehicle control unit monitors the SOC value of the super capacitor, the state of an accelerator pedal and the state of a brake pedal in real time;

s3: obtaining the required power P _ M _ req of the motor according to the state of the accelerator pedal and the state of the brake pedal;

s4: adjusting the output power of a fuel cell and the power of a super capacitor according to the required power P _ M _ req of the motor and the SOC value of the super capacitor;

s5: if the vehicle is kept in the start state, the process returns to step S2, otherwise, the process ends.

Preferably, step S3 is specifically:

if the accelerator pedal is trodden on; the motor required power P _ M _ req is a positive value, and the absolute value of the motor required power P _ M _ req is in direct proportion to the treading depth of the accelerator pedal;

if the brake pedal is trodden; the motor required power P _ M _ req is a negative value, and the absolute value of the motor required power P _ M _ req is in direct proportion to the treading depth of the brake pedal;

if the accelerator pedal is not trodden, the brake pedal is not trodden; the motor required power P _ M _ req is zero.

Preferably, if the power of the super capacitor is a positive value, the super capacitor is indicated to be discharged; and if the power of the super capacitor is a negative value, indicating that the super capacitor is charged.

Preferably, step S4 is specifically:

s41: judging the value of the required power P _ M _ req of the motor;

s42: if the required power P _ M _ req of the motor is zero, entering a first judgment process;

s43: if the required power P _ M _ req of the motor is a negative value, entering a second judgment process;

s44: and entering a third judgment process if the required power P _ M _ req of the motor is a positive value.

Preferably, the first determination process specifically includes:

judging the size of the SOC value of the super capacitor;

if the SOC value of the super capacitor is larger than or equal to the SOC preset maximum value SOC _ max; the output power of the fuel cell is adjusted to 0, and the power of the super capacitor is adjusted to 0;

if the SOC value of the super capacitor is smaller than the SOC preset maximum value SOC _ max; the fuel cell output power is adjusted to a super capacitor maximum charging power P _ sc _ maxcarge and the super capacitor power is adjusted to-P _ sc _ maxcarge.

Preferably, the second judgment flow specifically is:

judging the size of the SOC value of the super capacitor;

if the SOC value of the super capacitor is larger than or equal to the SOC preset maximum value SOC _ max; the output power of the fuel cell is adjusted to 0, and the power of the super capacitor is adjusted to 0;

if the SOC value of the super capacitor is smaller than the preset maximum SOC _ max of the super capacitor, judging whether the absolute value of the required power P _ M _ req of the motor is larger than or equal to the maximum charging power P _ sc _ maxcarge of the super capacitor; if yes, adjusting the output power of the fuel cell to be 0, and adjusting the power of the super capacitor to be-P _ sc _ maxcarge; if not, the output power of the fuel cell is adjusted to be 0, and the power of the super capacitor is adjusted to be-P _ M _ req.

Preferably, the third determination process specifically includes:

judging the magnitude of the required power P _ M _ req of the motor;

if the required power P _ M _ req of the motor is larger than the maximum value P _ fc _ max of the output power of the fuel cell, judging whether the SOC value of the super capacitor is smaller than or equal to the preset SOC minimum value SOC _ min of the super capacitor; if yes, adjusting the output power of the fuel cell to be the maximum value P _ fc _ max of the output power of the fuel cell, and adjusting the power of the super capacitor to be 0; if not, adjusting the output power of the fuel cell to the maximum value P _ fc _ max of the output power of the fuel cell, and adjusting the power of the super capacitor to the required power P _ M _ req of the motor-output power P _ fc of the fuel cell;

if the motor required power P _ M _ req is less than or equal to the maximum fuel cell output power value P _ fc _ max, the fourth determination process is entered.

Preferably, the fourth determination process specifically includes:

s441: judging the value of the required power P _ M _ req of the motor; if the required power P _ M _ req of the motor is greater than the minimum value P _ fc _ min of the output power of the fuel cell and is less than or equal to the maximum value P _ fc _ max of the output power of the fuel cell, the process proceeds to step S442; otherwise, go to step S444;

s442: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is larger than or equal to the maximum SOC value SOC _ max preset by the super capacitor, adjusting the output power of the fuel cell to be the minimum output power P _ fc _ min of the fuel cell, and adjusting the power of the super capacitor to be the required power P _ M _ req of the motor-output power P _ fc of the fuel cell; otherwise, go to step S443;

s443: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is larger than or equal to the SOC minimum value SOC _ min preset by the super capacitor, adjusting the output power of the fuel cell to be a first high-efficiency point P _ fc _ eff1 of the output power of the fuel cell, and adjusting the power of the super capacitor to be the required power P _ M _ req-output power P _ fc of the fuel cell; otherwise, the fuel cell output power is adjusted to a second high efficiency point P _ fc _ eff2 of the fuel cell output power, and the super capacitor power is adjusted to the motor required power P _ M _ req + the fuel cell output power P _ fc;

s444: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is greater than or equal to the preset SOC minimum value SOC _ min of the super capacitor, the step S445 is executed; otherwise, the output power of the fuel cell is adjusted to be the maximum charging power P _ sc _ maxcharge of the super capacitor and the required power P _ M _ req of the motor, and the power of the super capacitor is adjusted to be-P _ sc _ maxcharge;

s445: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is smaller than or equal to the maximum SOC value SOC _ max preset by the super capacitor, adjusting the output power of the fuel cell to be the required power P _ M _ req +10KW of the motor, and adjusting the power of the super capacitor to be-10 KW; otherwise, the output power of the fuel cell is adjusted to be 0, and the power of the super capacitor is adjusted to be the required power P _ M _ req of the motor.

A parallel fuel cell and supercapacitor energy management system comprising: the system comprises a fuel cell system, a unidirectional DC, a bidirectional DC, a motor, a super capacitor and a vehicle control unit;

the vehicle control unit is electrically connected with the fuel cell system and the super capacitor;

the fuel cell system is electrically connected with the unidirectional DC; the super capacitor is electrically connected with the bidirectional DC; the unidirectional DC is electrically connected with the bidirectional DC and the motor.

The invention has the following beneficial effects: the invention realizes the functions of system power distribution, braking energy recovery, super capacitor charging and the like, is more favorable for the distribution of the whole vehicle space of the power distribution module, and simultaneously ensures that the management of the whole vehicle energy is more reasonable and ordered.

Drawings

FIG. 1 is a schematic flow chart of a method for managing energy of a parallel fuel cell and a super capacitor according to the present invention;

FIG. 2 is a block diagram of the energy management system of the parallel fuel cell and supercapacitor of the present invention;

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, the present invention provides an energy management method for a parallel fuel cell and a super capacitor, which can firstly meet the power requirement of a vehicle in normal driving and reasonably control power distribution and energy flow direction, i.e. the power balance problem, and the energy management method for a parallel fuel cell and a super capacitor of the present invention is an energy control process based on a power following strategy;

the total efficiency of the system is improved according to a power following strategy, on the premise of ensuring the dynamic property of the whole vehicle, the effects of quick charging and quick discharging of the super capacitor and good dynamic property are fully exerted, the impact on the fuel cell system is reduced, the mechanical device in the fuel cell system can have enough adjusting time, the condition that the working life of the fuel cell system is influenced by local overheating or drying and the like in the cell is avoided, the defect of the dynamic property of the fuel cell system is made up, the service life of the cell is prolonged, the charging and discharging efficiency is improved, and the fuel economy of the whole vehicle is improved by recovering the braking energy to the maximum extent;

the method specifically comprises the following steps:

s1: starting the vehicle;

s2: the vehicle control unit monitors the SOC value of the super capacitor, the state of an accelerator pedal and the state of a brake pedal in real time;

s3: obtaining the required power P _ M _ req of the motor according to the state of the accelerator pedal and the state of the brake pedal;

s4: adjusting the output power of a fuel cell and the power of a super capacitor according to the required power P _ M _ req of the motor and the SOC value of the super capacitor;

s5: if the vehicle is kept in the start state, the process returns to step S2, otherwise, the process ends.

Further, step S3 is specifically:

if the accelerator pedal is trodden on; the motor required power P _ M _ req is a positive value, and the absolute value of the motor required power P _ M _ req is in direct proportion to the treading depth of the accelerator pedal; in a specific implementation, a proportional value of the absolute value of the required power P _ M _ req of the motor and the stepping depth of the accelerator pedal can be obtained by a real vehicle test.

If the brake pedal is trodden; the motor required power P _ M _ req is a negative value, and the absolute value of the motor required power P _ M _ req is in direct proportion to the treading depth of the brake pedal; in specific implementation, a proportional value of the absolute value of the required power P _ M _ req of the motor and the stepping depth of the brake pedal can be obtained by real vehicle testing.

If the accelerator pedal is not trodden, the brake pedal is not trodden; the motor required power P _ M _ req is zero.

Further, if the power of the super capacitor is a positive value, the super capacitor is indicated to discharge; and if the power of the super capacitor is a negative value, indicating that the super capacitor is charged.

Further, step S4 is specifically:

s41: judging the value of the required power P _ M _ req of the motor;

s42: if the required power P _ M _ req of the motor is zero, entering a first judgment process;

s43: if the required power P _ M _ req of the motor is a negative value, entering a second judgment process;

s44: and entering a third judgment process if the required power P _ M _ req of the motor is a positive value.

Further, the first determining process in step S42 specifically includes:

judging the size of the SOC value of the super capacitor;

if the SOC value of the super capacitor is larger than or equal to the SOC preset maximum value SOC _ max; the output power of the fuel cell is adjusted to 0, and the power of the super capacitor is adjusted to 0;

if the SOC value of the super capacitor is smaller than the SOC preset maximum value SOC _ max; the fuel cell output power is adjusted to a super capacitor maximum charging power P _ sc _ maxcarge and the super capacitor power is adjusted to-P _ sc _ maxcarge.

Further, the second determination flow in step S43 specifically is:

judging the size of the SOC value of the super capacitor;

if the SOC value of the super capacitor is larger than or equal to the SOC preset maximum value SOC _ max; the output power of the fuel cell is adjusted to 0, and the power of the super capacitor is adjusted to 0;

if the SOC value of the super capacitor is smaller than the preset maximum SOC _ max of the super capacitor, judging whether the absolute value of the required power P _ M _ req of the motor is larger than or equal to the maximum charging power P _ sc _ maxcarge of the super capacitor; if yes, adjusting the output power of the fuel cell to be 0, and adjusting the power of the super capacitor to be-P _ sc _ maxcarge; if not, the output power of the fuel cell is adjusted to be 0, and the power of the super capacitor is adjusted to be-P _ M _ req.

Further, the third determination process in step S44 specifically includes:

judging the magnitude of the required power P _ M _ req of the motor;

if the required power P _ M _ req of the motor is larger than the maximum value P _ fc _ max of the output power of the fuel cell, judging whether the SOC value of the super capacitor is smaller than or equal to the preset SOC minimum value SOC _ min of the super capacitor; if yes, adjusting the output power of the fuel cell to be the maximum value P _ fc _ max of the output power of the fuel cell, and adjusting the power of the super capacitor to be 0; if not, adjusting the output power of the fuel cell to the maximum value P _ fc _ max of the output power of the fuel cell, and adjusting the power of the super capacitor to the required power P _ M _ req of the motor-output power P _ fc of the fuel cell;

if the motor required power P _ M _ req is less than or equal to the maximum fuel cell output power value P _ fc _ max, the fourth determination process is entered.

Further, the fourth determination process specifically includes:

s441: judging the value of the required power P _ M _ req of the motor; if the required power P _ M _ req of the motor is greater than the minimum value P _ fc _ min of the output power of the fuel cell and is less than or equal to the maximum value P _ fc _ max of the output power of the fuel cell, the process proceeds to step S442; otherwise, go to step S444;

s442: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is larger than or equal to the maximum SOC value SOC _ max preset by the super capacitor, adjusting the output power of the fuel cell to be the minimum output power P _ fc _ min of the fuel cell, and adjusting the power of the super capacitor to be the required power P _ M _ req of the motor-output power P _ fc of the fuel cell; otherwise, go to step S443;

s443: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is larger than or equal to the SOC minimum value SOC _ min preset by the super capacitor, adjusting the output power of the fuel cell to be a first high-efficiency point P _ fc _ eff1 of the output power of the fuel cell, and adjusting the power of the super capacitor to be the required power P _ M _ req-output power P _ fc of the fuel cell; otherwise, the fuel cell output power is adjusted to a second high efficiency point P _ fc _ eff2 of the fuel cell output power, and the super capacitor power is adjusted to the motor required power P _ M _ req + the fuel cell output power P _ fc;

s444: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is greater than or equal to the preset SOC minimum value SOC _ min of the super capacitor, the step S445 is executed; otherwise, the output power of the fuel cell is adjusted to be the maximum charging power P _ sc _ maxcharge of the super capacitor and the required power P _ M _ req of the motor, and the power of the super capacitor is adjusted to be-P _ sc _ maxcharge;

s445: judging the size of the SOC value of the super capacitor; if the SOC value of the super capacitor is smaller than or equal to the maximum SOC value SOC _ max preset by the super capacitor, adjusting the output power of the fuel cell to be the required power P _ M _ req +10KW of the motor, and adjusting the power of the super capacitor to be-10 KW; otherwise, the output power of the fuel cell is adjusted to be 0, and the power of the super capacitor is adjusted to be the required power P _ M _ req of the motor.

In a specific implementation, the following steps:

presetting a maximum SOC value SOC _ max by the super capacitor;

presetting a SOC minimum value SOC _ min by the super capacitor;

the maximum charging power P _ sc _ maxcarge of the super capacitor;

the maximum value of the fuel cell output power P _ fc _ max;

the minimum value of the output power of the fuel cell P _ fc _ min;

a first high efficiency point P _ fc _ eff1 of the fuel cell output power;

the specific value of the second high efficiency point P _ fc _ eff2 of the fuel cell output power can be designed according to the model, the requirement and the actual vehicle test.

Referring to fig. 2, the energy management method of the parallel fuel cell and the super capacitor is implemented on an energy management system of the parallel fuel cell and the super capacitor, and the energy management system of the parallel fuel cell and the super capacitor comprises: the system comprises a fuel cell system, a unidirectional DC, a bidirectional DC, a motor, a super capacitor and a vehicle control unit;

the vehicle control unit is electrically connected with the fuel cell system and the super capacitor;

the fuel cell system is electrically connected with the unidirectional DC; the super capacitor is electrically connected with the bidirectional DC; the unidirectional DC is electrically connected with the bidirectional DC and the motor.

The super capacitor is used as an auxiliary energy source for low-temperature starting preheating of the fuel cell system and is used as an auxiliary power supply in the starting process of the fuel cell system, and the super capacitor and the auxiliary power supply are connected in parallel and used for supplying power for electric equipment of the whole vehicle; the DC converter at the fuel cell system end is unidirectional, the DC converter of the super capacitor is bidirectional, and when the required power P _ M _ req of the motor of the whole vehicle or the motor is large and the output power of the fuel cell system is insufficient, the super capacitor makes up the energy required by the whole vehicle or the motor.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third and the like do not denote any order, but rather the words first, second and the like may be interpreted as indicating any order.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.