CN112644332A - Electric automobile energy management system and method and automobile - Google Patents
Electric automobile energy management system and method and automobile Download PDFInfo
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- CN112644332A CN112644332A CN202011636649.4A CN202011636649A CN112644332A CN 112644332 A CN112644332 A CN 112644332A CN 202011636649 A CN202011636649 A CN 202011636649A CN 112644332 A CN112644332 A CN 112644332A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
- B60L58/13—Maintaining the SoC within a determined range
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Electric Propulsion And Braking For Vehicles (AREA)
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Abstract
The invention discloses an electric automobile energy management system, a method and an automobile, wherein the system comprises: the system comprises a fuel cell module, a first power cell module, a second power cell module and a direct current conversion control unit; the direct current conversion control unit is used for: the operating mode of real-time supervision whole car load, the output power state of fuel cell module, the electric quantity state of first power battery module and second power battery module to carry out corresponding control strategy, include: when the electric quantity of the first power battery module is monitored to be lower than that of the second power battery module and the electric quantity difference value between the second power battery module and the first power battery module is larger than a preset value: controlling the first power battery module to absorb the output power of the fuel battery module in the lowest output power state; and controlling the second power battery module to provide instantaneous power output for the load of the whole vehicle when the output power of the fuel battery module cannot meet the power output requirement of the load of the whole vehicle. The energy efficiency of the whole vehicle is improved.
Description
Technical Field
The invention relates to the technical field of fuel cell automobiles, in particular to an electric automobile energy management system and method and an automobile.
Background
The energy source of the fuel cell automobile is a fuel cell module and a power cell, and the fuel cell module requires a limit problem of minimum output power in the working process due to the particularity of the working principle of the fuel cell module, namely the output power of the fuel cell module is required to reach 5% -10% of rated output power after the fuel cell module is started, because the fuel cell module mainly ensures the stability and uniformity of gas in a flow channel, and then has a requirement of minimum gas flow, the minimum gas flow has the minimum power, namely the minimum power corresponds to the power, and if the gas flow is insufficient, the fuel cell module can be uneven and then burnt. As the automobile-used energy system, the car operating condition is complicated, especially in urban working condition, there are multiple to open and stop, if the start-stop operating mode of vehicle-mounted frequently opens and stops fuel cell module, on the one hand, because the start-stop time of fuel cell module is longer, only rely on power battery, can cause the dynamic property of whole car to receive the influence, on the other hand, frequent start-stop can cause great influence to the life of fuel cell module, consequently, under the transient stop operating mode, under the condition of not closing fuel cell module, it is in the idle state to need the fuel cell module, under this kind of operating mode, the fuel cell module has a minimum output power, this power needs whole car to consider the absorption.
At present, the fuel cell module has a soft power characteristic, and cannot run alone under working conditions such as acceleration and climbing to ensure the power performance of the whole vehicle, so that the fuel cell module and the power battery are used in parallel in the existing stage, the power battery is used for making up the defect of soft power characteristic of the fuel cell module, and meanwhile, the minimum output power of the fuel cell module is absorbed by the power battery.
In the existing single fuel cell module and single power cell power system structure, the power cell is required to be in a low electric quantity state to ensure that the single power cell can fully absorb the minimum output power of the fuel cell module, and if the electric quantity of the power cell is insufficient, the dynamic property of the vehicle in the driving process can not be ensured. Meanwhile, how to adjust the electric quantity state of the power battery through a reasonable control strategy also brings great problems to the whole vehicle control system. At present, because the fuel cell module is just in the starting stage, the fuel cell module system mainly used on the vehicle in the market takes 30kW as the main part, meanwhile, the capacity of the power battery carried by the whole vehicle is larger, so the problem is not outstanding at present, however, as fuel cell vehicles are developed into full-power fuel cell vehicles, the output power of the fuel cell modules mounted on the vehicles is increased, the carried power battery is smaller and smaller, which finally leads the power battery to generate larger contradiction in the control of electric quantity and output power, on one hand, if the electric quantity of the battery is lower, the whole vehicle can conveniently recover more energy, but the dynamic property of the whole vehicle is greatly influenced, and the working condition that the power battery needs to output high power and is insufficient in electric quantity occurs, if the electric quantity of the power battery is too high, the problem that the minimum output power of the fuel battery module cannot be fully absorbed is caused.
Disclosure of Invention
The invention aims to provide an electric automobile energy management system, method and automobile, which can realize maximization of energy utilization and improve energy efficiency of the whole automobile.
In a first aspect, the present invention provides an energy management system for an electric vehicle, including: the system comprises a fuel cell module, a first power cell module, a second power cell module and a direct current conversion control unit;
the fuel cell module, the first power cell module, the second power cell module and the whole vehicle load are respectively and electrically connected with the direct current conversion control unit;
the DC conversion control unit is used for:
monitoring the working condition of the load of the whole vehicle, the output power state of the fuel cell module and the electric quantity states of the first power cell module and the second power cell module in real time, and executing corresponding control strategies;
the control strategy comprises the following steps:
when the electric quantity of the first power battery module is monitored to be lower than the electric quantity of the second power battery module, and the electric quantity difference value between the second power battery module and the first power battery module is larger than a preset value:
controlling the first power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the second power battery module to provide instantaneous power output for the finished automobile load when the output power of the fuel battery module cannot meet the power output requirement of the finished automobile load so as to complement the power output requirement of the finished automobile load.
Optionally, the dc conversion control unit includes a controller, and a first dc converter, a second dc converter, and a third dc converter electrically connected to the controller, respectively;
the first power battery module is electrically connected with a finished automobile load through the first direct current converter, the second power battery module is electrically connected with the finished automobile load through the second direct current converter, and the fuel battery module is electrically connected with the finished automobile load through the third direct current converter;
the first dc converter and the second dc converter are electrically connected to the third dc converter, respectively.
Optionally, the control strategy further comprises:
when monitoring that the electric quantity of the first power battery module is gradually increased, the electric quantity of the second power battery module is gradually reduced, the electric quantity of the second power battery module is lower than the electric quantity of the first power battery module, and the electric quantity difference value between the second power battery module and the first power battery module is larger than the preset value:
controlling the second power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the first power battery module to provide instantaneous power output for the finished automobile load when the output power of the fuel battery module cannot meet the power output requirement of the finished automobile load so as to complement the power output requirement of the finished automobile load.
Optionally, the control strategy further comprises:
when the electric quantity of the first power battery module and the electric quantity of the second power battery module are monitored to be lower than a lowest electric quantity set value:
and controlling the fuel cell module to provide the power output of the whole vehicle load, and simultaneously controlling the fuel cell module to charge one of the first power cell module and the second power cell module until the electric quantity of the charged battery is higher than a first set value.
Optionally, the control strategy further comprises:
when monitoring that the electric quantity of the first power battery module and the electric quantity of the second power battery module are both higher than a highest electric quantity set value:
and closing the power output of the fuel cell module, and controlling the first power cell module or the second power cell module to provide the power output of the whole vehicle load until the circuit of the battery providing the power output is lower than a second set value.
In a second aspect, the present invention provides an energy management method for an electric vehicle, including:
monitoring the working condition of the load of the whole vehicle, the output power state of the fuel cell module and the electric quantity states of the first power cell module and the second power cell module in real time;
when the electric quantity of the first power battery module is monitored to be lower than the electric quantity of the second power battery module, and the electric quantity difference value between the second power battery module and the first power battery module is larger than a preset value:
controlling the first power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the second power battery module to provide instantaneous power output for the finished automobile load when the output power of the fuel battery module cannot meet the power output requirement of the finished automobile load so as to complement the power output requirement of the finished automobile load.
Optionally, the method further comprises:
when monitoring that the electric quantity of the first power battery module is gradually increased, the electric quantity of the second power battery module is gradually reduced, the electric quantity of the second power battery module is lower than the electric quantity of the first power battery module, and the electric quantity difference value between the second power battery module and the first power battery module is larger than the preset value:
controlling the second power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the first power battery module to provide instantaneous power output for the finished automobile load when the output power of the fuel battery module cannot meet the power output requirement of the finished automobile load so as to complement the power output requirement of the finished automobile load.
Optionally, the method further comprises:
when the electric quantity of the first power battery module and the electric quantity of the second power battery module are monitored to be lower than a lowest electric quantity set value:
and controlling the fuel cell module to provide the power output of the whole vehicle load, and simultaneously controlling the fuel cell module to charge one of the first power cell module and the second power cell module until the electric quantity of the charged battery is higher than a first set value.
Optionally, the method further comprises:
when monitoring that the electric quantity of the first power battery module and the electric quantity of the second power battery module are both higher than a highest electric quantity set value:
and closing the power output of the fuel cell module, and controlling the first power cell module or the second power cell module to provide the power output of the whole vehicle load until the circuit of the battery providing the power output is lower than a second set value.
In a third aspect, the invention further provides a vehicle comprising the fuel cell vehicle energy system of the first aspect.
The invention has the beneficial effects that:
through the structure of the double-power battery and the hydrogen fuel battery module, two power batteries are guaranteed by using a control strategy, one power battery is in a high-power state and is used for providing power supplement for the whole vehicle in the running process of the whole vehicle and guaranteeing the dynamic property of the running of the whole vehicle, the other second power battery module is in a low-power state and is used for fully absorbing the lowest output power of the fuel battery module which needs to be consumed and absorbed by the whole vehicle under the parking condition, meanwhile, the braking energy of the whole vehicle can be absorbed, and the maximization of energy utilization is guaranteed.
Further, with the change of the electric quantity of the two power batteries, the function roles of the two power batteries can be exchanged, the two power batteries alternately recover and release energy, and the power performance and the energy recovery and the reutilization of the whole vehicle are considered.
The system of the present invention has other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts.
Fig. 1 shows a schematic structural diagram of an energy management system of an electric vehicle according to an embodiment of the invention.
FIG. 2 is a step diagram illustrating a method for energy management of an electric vehicle according to an embodiment of the present invention.
Description of reference numerals:
the system comprises a fuel cell module 1, a first power cell module 2, a second power cell module 3, a whole vehicle load 4, a controller 5, a first direct current converter 6, a second direct current converter 7 and a third direct current converter 8.
Detailed Description
The proton exchange membrane fuel cell module has a limit of minimum output power in normal operation, the power is generally 5% -10% of rated power, at present, as the power of the vehicle-mounted fuel cell module is larger and larger, the required minimum output power is higher and higher, if the power cannot be recycled well, the power is a great energy waste for the whole vehicle, and the fuel cell module cannot recycle and utilize the energy. Meanwhile, if the problem cannot be well solved, due to the fact that the running working condition of the vehicle is complex, various working conditions needing 0 power output exist, frequent starting and stopping of the fuel cell module are prone to being caused, on one hand, the starting and stopping processes of the fuel cell module are long, time in several minutes is generally needed, and on the other hand, the service life of the fuel cell module can be greatly shortened due to frequent starting and stopping. Therefore, the recovery and the reutilization of the power are considered from the aspect of the whole vehicle, and the continuous operation of the fuel cell module can be ensured under the working condition that the vehicle is stopped for a short time.
The invention provides a double-battery energy management system aiming at the problem of minimum output power of a high-power vehicle-mounted fuel cell module in the normal working process and the characteristic of the current lithium battery, and when the SOC of a power battery is lower, the allowable charging power is higher, wherein one battery ensures sufficient electric quantity and can supplement power output for a whole vehicle under the working conditions of acceleration, climbing and the like in the running process of the vehicle. The other battery keeps very low electric quantity, so that the lowest output power of the fuel cell module which cannot be used by the whole vehicle can be absorbed as much as possible in the running process of the vehicle, and the braking energy of the vehicle can be recovered in the running process, and the energy efficiency of the whole vehicle is further improved.
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Fig. 1 shows a schematic structural diagram of an energy management system of an electric vehicle according to an embodiment of the invention.
As shown in fig. 1, an energy management system for an electric vehicle includes: the system comprises a fuel cell module, a first power cell module, a second power cell module and a direct current conversion control unit;
the fuel cell module, the first power cell module, the second power cell module and the whole vehicle load are respectively and electrically connected with the direct current conversion control unit;
the direct current conversion control unit is used for:
monitoring the working condition of the load of the whole vehicle, the output power state of the fuel cell module and the electric quantity states of the first power cell module and the second power cell module in real time, and executing a corresponding control strategy;
the control strategy comprises the following steps:
the control strategy one is as follows: when the electric quantity of the first power battery module is monitored to be lower than that of the second power battery module and the electric quantity difference value between the second power battery module and the first power battery module is larger than a preset value:
controlling the first power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the second power battery module to provide instantaneous power output for the load of the whole vehicle when the output power of the fuel battery module cannot meet the power output requirement of the load of the whole vehicle so as to complement the power output requirement of the load of the whole vehicle.
In a specific application scenario, the system working process is divided into several working conditions:
the working condition I is as follows:
firstly, setting the first power battery module to be in a low-power state, such as 30%, setting the second power battery module to be in a high-power state, such as 70%, outputting power along with the power requirement of the whole vehicle by the fuel battery module after the vehicle is started, and when the whole vehicle is in a temporary parking state, such as working conditions of waiting for a red light, traffic jam and the like, setting the fuel battery module to be in a state of lowest output power at the moment. And at the moment, the controller executes the first control strategy to ensure that the lowest output power of the fuel cell module is absorbed by the first power cell module. Since the first power battery module is in a low state of charge, it can absorb the lowest output power as much as possible. When the vehicle runs and experiences acceleration or climbing working conditions, the instantaneous required power is large, so that the fuel cell module is not enough to meet the required power of the whole vehicle, and at the moment, in order to meet the required power of the whole vehicle, the second power cell module instantaneously provides large power output to complement the required power of the whole vehicle and ensure the dynamic property of the whole vehicle.
It should be noted that the preset value of the electric quantity difference between the second power battery module and the first power battery module may be set according to actual requirements, for example, the difference between the two may be 20% or 30%.
Referring to fig. 1, in the present embodiment, the dc conversion control unit is implemented as follows:
the direct current conversion control unit comprises a controller, and a first direct current converter, a second direct current converter and a third direct current converter which are electrically connected with the controller respectively;
the first power battery module is electrically connected with the whole vehicle load through a first direct current converter, the second power battery module is electrically connected with the whole vehicle load through a second direct current converter, and the fuel battery module is electrically connected with the whole vehicle load through a third direct current converter;
the first and second dc converters are electrically connected to the third dc converter, respectively. Preferably, the first dc converter and the second dc converter are bidirectional DCDC converters, and the third dc converter is a unidirectional DCDC converter. Wherein, the load of the whole vehicle mainly comprises a driving motor.
In this embodiment, the control policy further includes a second control policy:
when monitoring the electric quantity of first power battery module and increasing gradually, the electric quantity of second power battery module reduces gradually, and the electric quantity of second power battery module is less than the electric quantity of first power battery module, and when the electric quantity difference between second power battery module and the first power battery module is greater than the default:
controlling the second power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the first power battery module to provide instantaneous power output for the finished automobile load when the output power of the fuel battery module cannot meet the power output requirement of the finished automobile load so as to complement the power output requirement of the finished automobile load.
In the above specific application scenario, the system conditions further include condition two:
in the whole process of the first working condition, the controller can monitor the electric quantity states of the first power battery module and the second power battery module in real time, when the electric quantity of the first power battery module is too high, at the moment, due to repeated consumption, the second power battery module is also in a state with lower electric quantity, the functions of the first power battery module and the second power battery module are interchanged, at the moment, the controller executes the control strategy II, the first power battery module supplements the output power of the whole vehicle under the working conditions of acceleration and climbing, and the second power battery module absorbs the lowest output power of the fuel battery module.
In this embodiment, the control policy further includes a third control policy:
when the electric quantity of the first power battery module and the electric quantity of the second power battery module are monitored to be lower than the lowest electric quantity set value, for example, the electric quantities are both lower than 30 percent:
and controlling the fuel cell module to provide the power output of the load of the whole vehicle, and simultaneously controlling the fuel cell module to charge one of the first power battery module and the second power battery module until the electric quantity of the charged battery is higher than a first set value, such as higher than 80%.
In the above specific application scenario, the system conditions further include a third condition:
in the whole vehicle running process, if the electric quantity of the first power battery module and the electric quantity of the second power battery module are in a low state (for example, the running process is less in starting and stopping times, but climbing is more, so that the power battery with high electric quantity consumes more, and the power battery with low electric quantity charges less), the controller executes the control strategy three, the whole vehicle is forced to sacrifice certain dynamic property, the fuel battery module is responsible for providing the power of the whole vehicle, and meanwhile, the fuel battery module charges the first power battery module or the second power battery module, so that the whole system is restored to the initial high electric quantity state of one power battery and the low electric quantity state of one power battery.
In this embodiment, the control policy further includes a fourth control policy:
when monitoring that the electric quantity of first power battery module and the electric quantity of second power battery module all are higher than the highest electric quantity set value, all are higher than 90% electric quantity for example:
and closing the power output of the fuel cell module, and controlling the first power cell module or the second power cell module to provide the power output of the load of the whole vehicle until the circuit of the battery providing the power output is lower than a second set value, such as lower than 20%.
In the above specific application scenario, the system conditions further include condition four:
in the whole vehicle running process, if the electric quantity of the first power battery module and the electric quantity of the second power battery module are both in an overhigh state (for example, the running process is more in starting and stopping times, but the climbing is less, so that the power battery with high electric quantity consumes less, and the power battery with low electric quantity charges more), the controller executes the control strategy four, the whole vehicle closes the fuel battery module, one of the power batteries provides power output of the whole vehicle, and when the electric quantity states of the two power batteries are recovered to the initial state with high electric quantity and low electric quantity, the fuel battery module is started again.
It should be noted that the maximum electric quantity set value and the minimum electric quantity set value of the electric quantity of the second power battery module and the first power battery module, the preset value of the difference between the maximum electric quantity set value and the minimum electric quantity set value, the first set value and the second set value in the present invention are not limited in scope, and those skilled in the art can perform specific setting according to actual situations, and details are not described herein.
As shown in fig. 2, an embodiment of the present invention further provides an energy management method for an electric vehicle, including:
s101, monitoring the working condition of the load of the whole vehicle, the output power state of the fuel cell module and the electric quantity states of the first power cell module and the second power cell module in real time;
in a specific application scenario, the first power battery module is set to be in a low-power state, the second power battery module is set to be in a high-power state, and after a vehicle is started, the fuel battery module outputs power along with the power requirement of the whole vehicle. And in the running process of the whole vehicle, the working condition of the load of the whole vehicle, the output power state of the fuel cell module and the electric quantity states of the first power cell module and the second power cell module are monitored in real time.
S102, when the situation that the electric quantity of the first power battery module is lower than that of the second power battery module and the electric quantity difference value between the second power battery module and the first power battery module is larger than a preset value is monitored:
controlling the first power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the second power battery module to provide instantaneous power output for the load of the whole vehicle when the output power of the fuel battery module cannot meet the power output requirement of the load of the whole vehicle so as to complement the power output requirement of the load of the whole vehicle.
In above-mentioned specific application scenario, when whole car is in temporary parking state, if wait operating mode such as red light, traffic congestion, the fuel cell module is in minimum output's state this moment, and this power is absorbed by first power battery module. Since the first power battery module is in a low state of charge, it can absorb the lowest output power as much as possible. When the vehicle runs and experiences acceleration or climbing working conditions, the instantaneous required power is large, so that the fuel cell module is not enough to meet the required power of the whole vehicle, and at the moment, in order to meet the required power of the whole vehicle, the second power cell module instantaneously provides large power output to complement the required power of the whole vehicle and ensure the dynamic property of the whole vehicle.
S103, when the electric quantity of the first power battery module is monitored to be gradually increased, the electric quantity of the second power battery module is gradually reduced, the electric quantity of the second power battery module is lower than that of the first power battery module, and the electric quantity difference value between the second power battery module and the first power battery module is larger than a preset value:
controlling the second power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the first power battery module to provide instantaneous power output for the finished automobile load when the output power of the fuel battery module cannot meet the power output requirement of the finished automobile load so as to complement the power output requirement of the finished automobile load.
In the above-mentioned specific application scenario, in the whole process, the controller can monitor the electric quantity state of the first power battery module and the second power battery module in real time, when the electric quantity of the first power battery module is too high, at this moment, because of multiple consumption, the second power battery module is also in the state that the electric quantity is lower, the functions of the first power battery module and the second power battery module are exchanged, at this moment, the output power of the whole vehicle under the acceleration and climbing working conditions is complemented by the first power battery module, and the lowest output power of the above fuel battery module is absorbed by the second power battery module.
S104, when the electric quantity of the first power battery module and the electric quantity of the second power battery module are monitored to be lower than the lowest electric quantity set value:
and controlling the fuel cell module to provide the power output of the load of the whole vehicle, and simultaneously controlling the fuel cell module to charge one of the first power battery module and the second power battery module until the electric quantity of the charged battery is higher than a first set value.
In the above-mentioned specific application scenario, in the whole vehicle operation process, if the electric quantity of the first power battery module and the electric quantity of the second power battery module are both in a low state, at this moment, the whole vehicle is forced to sacrifice a certain dynamic property, the fuel battery module is responsible for providing the power of the whole vehicle, and simultaneously, the fuel battery module charges the first power battery module or the second power battery module, so that the whole system is restored to the initial high electric quantity state of one power battery and the low electric quantity state of one power battery.
S105, when the electric quantity of the first power battery module and the electric quantity of the second power battery module are monitored to be higher than the highest electric quantity set value:
and closing the power output of the fuel cell module, and controlling the first power cell module or the second power cell module to provide the power output of the load of the whole vehicle until the circuit of the battery providing the power output is lower than a second set value.
In the above-mentioned specific application scenario, in the whole vehicle running process, if the electric quantity of the first power battery module and the electric quantity of the second power battery module are both too high, at the moment, the whole vehicle closes the fuel battery module, one of the power batteries provides the power output of the whole vehicle, and when the electric quantity states of the two power batteries are recovered to the initial state with high electric quantity and low electric quantity, the fuel battery module is started again.
The embodiment of the invention also provides an automobile, which comprises the fuel cell automobile energy system of the embodiment.
The automobile using the fuel cell automobile energy system of the embodiment can realize the recovery of the minimum output power of the fuel cell module and the braking energy of the automobile in the running process of the automobile, ensure the dynamic property of the automobile in the running process and improve the energy use efficiency of the whole automobile.
To sum up, the working mode of the power system of the double-power battery + hydrogen fuel cell module designed by the invention is that one of the two batteries is used for absorbing the lowest output power of the fuel cell module, the other power battery is used for meeting the power performance of the whole vehicle, the functions and roles of the two power batteries can be interchanged in the use process, the power system comprises a controller and a corresponding control strategy aiming at the capacity system, different control strategies are designed aiming at the different electric quantities of the two power batteries in the running process of the vehicle, and the control strategies of four working conditions are designed aiming at the different electric quantities; the charging characteristic of the power battery is fully considered, the energy system is constructed by two batteries with different electric quantities, and the recovery and utilization of energy are fully considered on the basis of keeping the dynamic property of the vehicle. Particularly, in a full-power fuel cell vehicle, since the output power of the fuel cell module mounted on the vehicle is large and the minimum output power is also large, the best effect of recovering and reusing the minimum output power can be achieved.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. An electric vehicle energy management system, comprising: the system comprises a fuel cell module, a first power cell module, a second power cell module and a direct current conversion control unit;
the fuel cell module, the first power cell module, the second power cell module and the whole vehicle load are respectively and electrically connected with the direct current conversion control unit;
the DC conversion control unit is used for:
monitoring the working condition of the load of the whole vehicle, the output power state of the fuel cell module and the electric quantity states of the first power cell module and the second power cell module in real time, and executing corresponding control strategies;
the control strategy comprises the following steps:
when the electric quantity of the first power battery module is monitored to be lower than the electric quantity of the second power battery module, and the electric quantity difference value between the second power battery module and the first power battery module is larger than a preset value:
controlling the first power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the second power battery module to provide instantaneous power output for the finished automobile load when the output power of the fuel battery module cannot meet the power output requirement of the finished automobile load so as to complement the power output requirement of the finished automobile load.
2. The fuel cell vehicle energy system according to claim 1, wherein the dc conversion control unit includes a controller, and a first dc converter, a second dc converter, and a third dc converter electrically connected to the controller, respectively;
the first power battery module is electrically connected with a finished automobile load through the first direct current converter, the second power battery module is electrically connected with the finished automobile load through the second direct current converter, and the fuel battery module is electrically connected with the finished automobile load through the third direct current converter;
the first dc converter and the second dc converter are electrically connected to the third dc converter, respectively.
3. The fuel cell automotive power system of claim 1, wherein the control strategy further comprises:
when monitoring that the electric quantity of the first power battery module is gradually increased, the electric quantity of the second power battery module is gradually reduced, the electric quantity of the second power battery module is lower than the electric quantity of the first power battery module, and the electric quantity difference value between the second power battery module and the first power battery module is larger than the preset value:
controlling the second power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the first power battery module to provide instantaneous power output for the finished automobile load when the output power of the fuel battery module cannot meet the power output requirement of the finished automobile load so as to complement the power output requirement of the finished automobile load.
4. The fuel cell automotive power system of claim 1, wherein the control strategy further comprises:
when the electric quantity of the first power battery module and the electric quantity of the second power battery module are monitored to be lower than a lowest electric quantity set value:
and controlling the fuel cell module to provide the power output of the whole vehicle load, and simultaneously controlling the fuel cell module to charge one of the first power cell module and the second power cell module until the electric quantity of the charged battery is higher than a first set value.
5. The fuel cell automotive power system of claim 1, wherein the control strategy further comprises:
when monitoring that the electric quantity of the first power battery module and the electric quantity of the second power battery module are both higher than a highest electric quantity set value:
and closing the power output of the fuel cell module, and controlling the first power cell module or the second power cell module to provide the power output of the whole vehicle load until the circuit of the battery providing the power output is lower than a second set value.
6. An electric vehicle energy management method is characterized by comprising the following steps:
monitoring the working condition of the load of the whole vehicle, the output power state of the fuel cell module and the electric quantity states of the first power cell module and the second power cell module in real time;
when the electric quantity of the first power battery module is monitored to be lower than the electric quantity of the second power battery module, and the electric quantity difference value between the second power battery module and the first power battery module is larger than a preset value:
controlling the first power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the second power battery module to provide instantaneous power output for the finished automobile load when the output power of the fuel battery module cannot meet the power output requirement of the finished automobile load so as to complement the power output requirement of the finished automobile load.
7. The electric vehicle energy management method of claim 1, further comprising:
when monitoring that the electric quantity of the first power battery module is gradually increased, the electric quantity of the second power battery module is gradually reduced, the electric quantity of the second power battery module is lower than the electric quantity of the first power battery module, and the electric quantity difference value between the second power battery module and the first power battery module is larger than the preset value:
controlling the second power battery module to absorb the output power of the fuel battery module in the lowest output power state;
and controlling the first power battery module to provide instantaneous power output for the finished automobile load when the output power of the fuel battery module cannot meet the power output requirement of the finished automobile load so as to complement the power output requirement of the finished automobile load.
8. The electric vehicle energy management method of claim 1, further comprising:
when the electric quantity of the first power battery module and the electric quantity of the second power battery module are monitored to be lower than a lowest electric quantity set value:
and controlling the fuel cell module to provide the power output of the whole vehicle load, and simultaneously controlling the fuel cell module to charge one of the first power cell module and the second power cell module until the electric quantity of the charged battery is higher than a first set value.
9. The electric vehicle energy management method of claim 1, further comprising:
when monitoring that the electric quantity of the first power battery module and the electric quantity of the second power battery module are both higher than a highest electric quantity set value:
and closing the power output of the fuel cell module, and controlling the first power cell module or the second power cell module to provide the power output of the whole vehicle load until the circuit of the battery providing the power output is lower than a second set value.
10. An automobile comprising the fuel cell automobile energy system of any one of claims 1 to 5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113799652A (en) * | 2021-07-16 | 2021-12-17 | 河南科技大学 | Energy management method for double-battery-pack combined electric tractor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205395796U (en) * | 2016-03-07 | 2016-07-27 | 蒙建伟 | Automatic switched systems of electric automobile double cell |
| CN105904978A (en) * | 2016-05-31 | 2016-08-31 | 重庆理工大学 | Range extension type electric vehicle with double power battery packs |
| CN106183855A (en) * | 2016-07-25 | 2016-12-07 | 北京新能源汽车股份有限公司 | Electric automobile power battery system and control method |
| CN108621812A (en) * | 2017-03-21 | 2018-10-09 | 郑州宇通客车股份有限公司 | A kind of fuel cell hybrid system operation control method |
| WO2020135722A1 (en) * | 2018-12-29 | 2020-07-02 | 清华大学 | Power system control method of fuel cell vehicle, computer device, and storage medium |
| CN211829045U (en) * | 2020-04-02 | 2020-10-30 | 风氢扬科技(杭州)有限公司 | New energy automobile and driving system |
-
2020
- 2020-12-31 CN CN202011636649.4A patent/CN112644332A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205395796U (en) * | 2016-03-07 | 2016-07-27 | 蒙建伟 | Automatic switched systems of electric automobile double cell |
| CN105904978A (en) * | 2016-05-31 | 2016-08-31 | 重庆理工大学 | Range extension type electric vehicle with double power battery packs |
| CN106183855A (en) * | 2016-07-25 | 2016-12-07 | 北京新能源汽车股份有限公司 | Electric automobile power battery system and control method |
| CN108621812A (en) * | 2017-03-21 | 2018-10-09 | 郑州宇通客车股份有限公司 | A kind of fuel cell hybrid system operation control method |
| WO2020135722A1 (en) * | 2018-12-29 | 2020-07-02 | 清华大学 | Power system control method of fuel cell vehicle, computer device, and storage medium |
| CN211829045U (en) * | 2020-04-02 | 2020-10-30 | 风氢扬科技(杭州)有限公司 | New energy automobile and driving system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113799652A (en) * | 2021-07-16 | 2021-12-17 | 河南科技大学 | Energy management method for double-battery-pack combined electric tractor |
| CN113799652B (en) * | 2021-07-16 | 2023-05-30 | 河南科技大学 | Dual-battery-pack combined type electric tractor energy management method |
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