CN113879176A - Battery power control method and device for electric vehicle - Google Patents
Battery power control method and device for electric vehicle Download PDFInfo
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- CN113879176A CN113879176A CN202111180154.XA CN202111180154A CN113879176A CN 113879176 A CN113879176 A CN 113879176A CN 202111180154 A CN202111180154 A CN 202111180154A CN 113879176 A CN113879176 A CN 113879176A
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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]
- B60L58/14—Preventing excessive discharging
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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]
- B60L58/15—Preventing overcharging
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
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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
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/44—Control modes by parameter estimation
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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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The embodiment of the application provides a method and a device for controlling battery power of an electric vehicle, in the method for controlling battery power of an electric vehicle, the driving required power of a motor and the allowable battery discharge power of the electric vehicle in the driving process are obtained, when the electric vehicle is in a driving state, the driving required power of the motor and the allowable battery discharge power are judged, and when the driving required power of the motor is larger than the allowable battery discharge power, the maximum battery discharge power is output according to the allowable battery discharge power. The output and the recovered power are determined according to the power, the over-discharge and over-charge conditions of the battery are reduced, the battery is ensured to stably operate in a power safety area, the service life of the battery is prolonged, additional hardware equipment is not required to be added, and the cost is saved.
Description
[ technical field ] A method for producing a semiconductor device
The application relates to the technical field of electric automobiles, in particular to a method and a device for controlling battery power of an electric automobile.
[ background of the invention ]
Because of the shortage of energy and the environmental pollution caused by the traditional fuel vehicle, the electric vehicle gets more and more attention with its unique advantages, wherein, the high-voltage power battery is the most important power source of the electric vehicle, but in the case of rapid acceleration, the driving power of the motor is easy to exceed the maximum discharging power allowed by the battery, in the case of rapid deceleration, the recovered power is easy to exceed the maximum charging power allowed by the battery, both cases cause great damage to the battery, once the battery is in sound failure, the power of the vehicle is lost if light, and the vehicle is self-ignited if heavy. Therefore, the protection of the safe and reliable operation of the power battery has great significance. The prior art needs to detect that the battery has an overcharge or overdischarge problem before adjustment, and the battery has a certain damage.
Therefore, in order to protect the performance and the service life of the battery, a technical scheme for controlling the power of the battery of the electric vehicle needs to be provided urgently.
[ summary of the invention ]
The embodiment of the invention provides a method and a device for controlling the power of a battery of an electric automobile, which can reduce the over-discharge and over-charge of the battery, ensure the stable operation of the battery in a power safety area and prolong the service life of the battery, and can save the cost without adding extra hardware equipment.
In a first aspect, an embodiment of the present invention provides a method for controlling battery power of an electric vehicle, including: acquiring the driving required power of a motor and the allowable discharging power of a battery of the electric automobile in the driving process; when the electric automobile is in a driving state, judging the driving required power of the motor and the allowable discharging power of the battery; and when the driving required power of the motor is larger than the discharge power allowed by the battery, outputting according to the maximum discharge power allowed by the battery.
According to the maximum discharge power output allowed by the battery, the output power is prevented from being larger than the discharge power allowed by the battery, the performance of the battery is protected, the battery works in a power safety area, and the service life of the battery is prolonged.
In one possible implementation manner, the method further includes: and when the driving required power of the motor is less than or equal to the allowable discharge power of the battery, outputting according to the required power of the motor.
In one possible implementation manner, the method further includes: acquiring the recovery required power of a motor and the allowable charging power of a battery of the electric automobile in the deceleration process;
when the electric automobile is in a deceleration state, judging the recycling required power of the motor and the allowable charging power of the battery;
and when the recovery required power of the motor is greater than the allowable charging power of the battery, recovering according to the allowable maximum recovery power of the battery.
In one possible implementation manner, the method further includes: and when the recovery required power of the motor is less than or equal to the allowable charging power of the battery, recovering according to the recovery required power of the motor.
In one possible implementation manner, the method further includes: acquiring actual battery discharge power of the electric automobile and actual battery charging power of the electric automobile;
when the actual discharge power of the battery is detected to exceed the allowable discharge power of the battery, reducing the driving power of the driving motor by calculating the exceeding amplitude and the exceeding duration of the actual discharge power of the battery;
and when the actual charging power of the battery is detected to exceed the allowable charging power of the battery, reducing the power recovered by the driving motor by calculating the exceeding amplitude and the exceeding duration of the actual charging power of the battery.
The amplitude of the actual discharge power exceeding of the battery is the difference value between the actual discharge power of the battery and the allowable discharge power of the battery; the amplitude of the actual charging power exceeding of the battery is the difference value between the actual charging power of the battery and the allowable charging power of the battery.
In one possible implementation manner, the method further includes: calculating the driving required power of the motor according to the current vehicle speed and the opening degree of an accelerator pedal;
calculating the allowable discharge power of the battery according to the voltage U of the battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomer;
calculating the required power recovered by the motor according to the current vehicle speed and the opening degree of a brake pedal;
calculating the allowable charging electric power of the battery according to the voltage U of the battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomers;
calculating the actual discharge power of the battery according to the voltage U of the battery bus and the current I of the battery bus;
and calculating the actual charging power of the battery according to the voltage U of the battery bus and the current I of the battery bus.
In a second aspect, an embodiment of the present invention provides an electric vehicle battery power control apparatus, where the apparatus includes:
the acquisition module is used for acquiring the driving required power of the motor and the allowable discharging power of the battery in the driving process of the electric automobile;
the comparison module is used for judging the driving required power of the motor and the allowable discharge power of the battery when the electric automobile is in a driving state;
and the output module is used for outputting according to the maximum discharge power allowed by the battery when the driving required power of the motor is greater than the discharge power allowed by the battery.
In one possible implementation manner, the obtaining module is further configured to obtain a recovered required power of the motor and an allowable charging power of the battery during a deceleration process of the electric vehicle;
the judging module is also used for judging the recycling demand power of the motor and the allowable charging power of the battery when the electric automobile is in a deceleration state;
the device further comprises:
and the recovery module is used for recovering the maximum recovery power according to the allowed battery when the recovery required power of the motor is greater than the allowed charging power of the battery.
In one possible implementation manner, the recovery module is further configured to recover the required power according to the recovered required power of the motor when the recovered required power of the motor is less than or equal to the allowable charging power of the battery.
In one possible implementation manner, the obtaining module is further configured to obtain an actual discharging power of a battery of the electric vehicle and an actual charging power of the battery of the electric vehicle;
the output module is further used for reducing the driving power of the driving motor by calculating the exceeding amplitude and the exceeding duration of the actual discharging power of the battery when the actual discharging power of the battery is detected to exceed the allowable discharging power of the battery;
the recovery module is further used for reducing the recovered power of the driving motor by calculating the exceeding amplitude and the exceeding duration of the actual charging power of the battery when the actual charging power of the battery is detected to exceed the allowable charging power of the battery.
The amplitude of the actual discharge power exceeding of the battery is the difference value between the actual discharge power of the battery and the allowable discharge power of the battery; the amplitude of the actual charging power exceeding of the battery is the difference value between the actual charging power of the battery and the allowable charging power of the battery.
In one possible implementation manner, the apparatus further includes:
the calculation module is used for calculating the driving required power of the motor according to the current vehicle speed and the opening degree of an accelerator pedal;
calculating the allowable discharge power of the battery according to the voltage U of the battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomer;
calculating the required power recovered by the motor according to the current vehicle speed and the opening degree of a brake pedal;
calculating the allowable charging electric power of the battery according to the voltage U of the battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomers;
calculating the actual discharge power of the battery according to the voltage U of the battery bus and the current I of the battery bus;
and calculating the actual charging power of the battery according to the voltage U of the battery bus and the current I of the battery bus.
In a third aspect, an embodiment of the present invention provides a vehicle-mounted terminal device, including: at least one processor; and at least one memory communicatively coupled to the processor, wherein: the memory stores program instructions executable by the processor, the processor calling the program instructions to be able to perform the method provided by the first aspect.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method provided in the first aspect.
It should be understood that the second to fourth aspects of the embodiment of the present application are consistent with the technical solution of the first aspect of the embodiment of the present invention, and the beneficial effects obtained by the aspects and the corresponding possible implementation are similar, and are not described again.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a battery power control method according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a power control apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a vehicle-mounted terminal according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions in the present specification, the following detailed description of the embodiments of the present application is provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only a few embodiments of the present specification, and not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments in the present specification without any inventive step are within the scope of the present specification.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the specification. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In the prior art, the adjustment is performed only when the battery is detected to have an overcharge or overdischarge problem, and the battery is damaged to a certain extent.
Referring to fig. 1, fig. 1 is a schematic flowchart illustrating a short message notification method applied to an electric vehicle according to an embodiment of the present invention, where the method includes:
step S11: acquiring the driving required power of a motor of the electric automobile and the allowable discharging power of a battery of the electric automobile in the driving process;
the driving demand power of the motor is calculated according to the current vehicle speed and the opening degree of an accelerator pedal;
the allowable discharge power of the battery is calculated through the voltage U of a battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomer.
Step S12: when the electric automobile is in a driving state, judging the driving required power of the motor and the allowable discharging power of the battery;
and step S13, when the driving required power of the motor is larger than the allowable discharging power of the battery, outputting according to the allowable maximum discharging power of the battery.
And at the moment, the battery is allowed to output the maximum discharge power so as to prevent the output power from being larger than the discharge power allowed by the battery and damaging the battery.
And when the driving required power of the motor is less than or equal to the allowable discharge power of the battery, outputting according to the required power of the motor.
And at the moment, according to the required power output of the motor, the output power is ensured to be within the range of the allowable discharge power of the battery, so that the battery is protected from being damaged.
The driving required power of the motor and the allowable discharging power of the battery of the electric automobile in the driving process are calculated, the power of the electric automobile in different states is compared, the output power is determined according to the power, and the overdischarge condition of the battery is reduced. The embodiment of the invention controls the output power before the over-discharge of the battery occurs, ensures that the battery stably runs in a power safety area, prolongs the service life of the battery, does not need to add extra hardware equipment and saves the cost.
The embodiment of the invention limits the output power of the battery to achieve the effect of protecting the battery, and also limits the recovery power of the battery when the battery recovers energy, and the energy recovery principle is that in the braking or decelerating process, under the condition of ensuring the braking performance of the vehicle, the kinetic energy of the vehicle is converted into electric energy to be stored in the battery by driving the motor to generate electricity, so as to realize energy recovery.
Optionally, the recovered required power of the motor and the allowable charging power of the battery of the electric vehicle in the deceleration process are obtained.
The recovery required power of the motor is calculated through the current vehicle speed and the opening degree of a brake pedal;
the allowable charging power of the battery is calculated through the voltage U of a battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomer.
When the electric automobile is in a deceleration state, judging the recycling required power of the motor and the allowable charging power of the battery;
when the recovery required power of the motor is larger than the allowable charging power of the battery, recovering according to the allowable maximum recovery power of the battery;
and when the recovery required power of the motor is less than or equal to the allowable charging power of the battery, recovering according to the recovery required power of the motor.
When the recovery required power of the motor is greater than the allowable charging power of the battery, the motor is recovered according to the maximum recovery power allowed by the battery, so that the damage to the battery caused by the fact that the recovered power is greater than the allowable charging power of the battery can be prevented; when the recovery required power of the motor is less than or equal to the allowable charging power of the battery, recovering according to the recovery required power of the motor, and ensuring that the recovered power is within the range of the allowable charging power of the battery. According to the embodiment of the invention, the recovered power is limited before the battery is overcharged, so that the battery can stably run in a safety area, and the service life of the battery and the safety of a vehicle are ensured.
The embodiment of the present invention further provides a technical solution to solve the above situation when the actual discharging power of the battery exceeds the allowable discharging power of the battery or when the actual charging power of the battery exceeds the allowable charging power of the battery.
Optionally, acquiring an actual battery discharging function of the electric vehicle and an actual battery charging power of the electric vehicle;
when the actual discharge power of the battery is detected to exceed the allowable discharge power of the battery, reducing the driving power of a driving motor by calculating the exceeding amplitude and the exceeding duration of the actual discharge power of the battery;
and when the actual charging power of the battery is detected to exceed the allowable charging power of the battery, reducing the recovered power of the driving motor by calculating the exceeding amplitude and the exceeding duration of the actual charging power of the battery.
The actual discharge power of the battery is calculated through a battery bus voltage U and a battery bus current I;
and the actual charging power of the battery is calculated through the voltage U of the battery bus and the current I of the battery bus.
The amplitude of the actual discharge power of the battery exceeding is the difference value between the actual discharge power of the battery and the allowable discharge power of the battery; the amplitude of the actual charging power exceeding of the battery is the difference value between the actual charging power of the battery and the allowable charging power of the battery.
By adopting the solution, even if the actual discharge power of the battery exceeds the allowable discharge power of the battery or the actual charge power of the battery exceeds the allowable charge power of the battery, the problem can be solved by reducing the driving power of the driving motor or the recovery power of the driving motor, and the battery is further ensured not to work in an overcharged or overdischarged state.
Fig. 2 shows an embodiment of the present invention, which further provides a device for implementing the technical solution of the above-mentioned method embodiment, in the embodiment of the present invention, the power control device 100 includes a calculating module 101, an obtaining module 102, a determining module 103, an outputting module 104, and a recovering module 105; the acquisition module is used for acquiring the driving required power of a motor and the allowable discharging power of a battery in the driving process of the electric automobile; the judging module is used for judging the driving required power of the motor and the allowable discharging power of the battery when the electric automobile is in a driving state; and the output module is used for outputting according to the maximum discharge power allowed by the battery when the driving required power of the motor is greater than the discharge power allowed by the battery.
In an optional manner, the output module is further configured to output the required power of the motor when the required driving power of the motor is less than or equal to the allowable discharge power of the battery.
In an optional mode, the obtaining module is further used for obtaining the recovered required power of the motor and the allowable charging power of the battery of the electric vehicle during the deceleration process;
the judging module is also used for judging the recycling demand power of the motor and the allowable charging power of the battery when the electric automobile is in a deceleration state;
the device further comprises:
and the recovery module is used for recovering the maximum recovery power according to the allowed battery when the recovery required power of the motor is greater than the allowed charging power of the battery.
In an optional manner, the recovery module is further configured to recover the required power according to the recovery of the motor when the recovery required power of the motor is less than or equal to the allowable charging power of the battery.
In an optional mode, the obtaining module is further configured to obtain an actual battery discharge power of the electric vehicle and an actual battery charge power of the electric vehicle;
the output module is further used for reducing the driving power of the driving motor by calculating the exceeding amplitude and the exceeding duration of the actual discharging power of the battery when the actual discharging power of the battery is detected to exceed the allowable discharging power of the battery;
the recovery module is also used for reducing the recovery power of the driving motor by calculating the exceeding amplitude and the exceeding duration of the actual charging power of the battery when the actual charging power of the battery is detected to exceed the allowable charging power of the battery.
The amplitude of the actual discharge power exceeding of the battery is the difference value between the actual discharge power of the battery and the allowable discharge power of the battery; the amplitude of the actual charging power exceeding of the battery is the difference value between the actual charging power of the battery and the allowable charging power of the battery.
In an optional manner, the apparatus further comprises:
the calculation module is used for calculating the driving required power of the motor according to the current vehicle speed and the opening degree of an accelerator pedal;
calculating the allowable discharge power of the battery according to the voltage U of the battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomer;
calculating the required power recovered by the motor according to the current vehicle speed and the opening degree of a brake pedal;
calculating the allowable charging electric power of the battery according to the voltage U of the battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomers;
calculating the actual discharge power of the battery according to the voltage U of the battery bus and the current I of the battery bus;
and calculating the actual charging power of the battery according to the voltage U of the battery bus and the current I of the battery bus.
The apparatus provided in the embodiment shown in fig. 2 may be used to implement the technical solution of the method embodiment shown above, and further reference may be made to the related description in the method embodiment for realizing the principle and the technical effect, which are not described herein again.
Fig. 3 is a schematic structural diagram of a vehicle-mounted terminal according to an embodiment of the present invention, where the vehicle-mounted terminal 200 includes a processor 201, a memory 202, and a computer program that is stored in the memory 202 and can be run on the processor 201, and when the processor 201 executes the program, the steps in the foregoing method embodiment are implemented, and the vehicle-mounted terminal according to the embodiment can be used to implement the technical solution according to the foregoing method embodiment, and the implementation principle and technical effect of the vehicle-mounted terminal may further refer to the description in the method embodiment, and are not described herein again.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
In the description of the specification, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present description in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present description.
In the several embodiments provided in the present specification, it should be understood that the disclosed apparatus, device and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
In addition, functional units in the embodiments of the present description may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The above description is only a preferred embodiment of the present disclosure, and should not be taken as limiting the present disclosure, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (14)
1. A battery power control method for an electric vehicle is characterized by being applied to the electric vehicle and comprising the following steps:
acquiring the driving required power of a motor and the allowable discharging power of a battery of the electric automobile in the driving process;
when the electric automobile is in a driving state, judging the required power of the motor and the allowable discharge power of the battery;
and when the driving required power of the motor is larger than the discharge power allowed by the battery, outputting according to the maximum discharge power allowed by the battery.
2. The method of claim 1, further comprising:
and when the driving required power of the motor is less than or equal to the allowable discharge power of the battery, outputting according to the required power of the motor.
3. The method of claim 1, further comprising:
acquiring the recovery required power of a motor and the allowable charging power of a battery of the electric automobile in the deceleration process;
when the electric automobile is in a deceleration state, judging the recycling required power of the motor and the allowable charging power of the battery;
and when the recovery required power of the motor is greater than the allowable charging power of the battery, recovering according to the allowable maximum recovery power of the battery.
4. The method of claim 3, further comprising:
and when the recovery required power of the motor is less than or equal to the allowable charging power of the battery, recovering according to the recovery required power of the motor.
5. The method according to any one of claims 1-4, further comprising:
acquiring actual battery discharge power of the electric automobile and actual battery charging power of the electric automobile;
when the actual discharge power of the battery is detected to exceed the allowable discharge power of the battery, reducing the driving power of a driving motor by calculating the exceeding amplitude and the exceeding duration of the actual discharge power of the battery;
when the actual charging power of the battery is detected to exceed the allowable charging power of the battery, reducing the power recovered by a driving motor by calculating the exceeding amplitude and the exceeding duration of the actual charging power of the battery;
the amplitude of the actual discharge power exceeding of the battery is the difference value between the actual discharge power of the battery and the allowable discharge power of the battery; the amplitude of the actual charging power exceeding of the battery is the difference value between the actual charging power of the battery and the allowable charging power of the battery.
6. The method of claim 5, further comprising:
calculating the driving required power of the motor according to the current vehicle speed and the opening degree of an accelerator pedal;
calculating the allowable discharge power of the battery according to the voltage U of the battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomer;
calculating the required power recovered by the motor according to the current vehicle speed and the opening degree of a brake pedal;
calculating the allowable charging electric power of the battery according to the voltage U of the battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomers;
calculating the actual discharge power of the battery according to the voltage U of the battery bus and the current I of the battery bus;
and calculating the actual charging power of the battery according to the voltage U of the battery bus and the current I of the battery bus.
7. The utility model provides an electric automobile battery power control device which characterized in that, is applied to electric automobile, includes:
the acquisition module is used for acquiring the driving required power of a motor and the allowable discharging power of a battery in the driving process of the electric automobile;
the judging module is used for judging the driving required power of the motor and the allowable discharging power of the battery when the electric automobile is in a driving state;
and the output module is used for outputting according to the maximum discharge power allowed by the battery when the driving required power of the motor is greater than the discharge power allowed by the battery.
8. The apparatus according to claim 7, wherein the output module is further configured to output the electric power as required by the motor when the driving required power of the electric motor is equal to or less than the discharge allowable power of the battery.
9. The device of claim 7, wherein the obtaining module is further configured to obtain a recovered required power of the motor and an allowable charging power of the battery during deceleration of the electric vehicle;
the judging module is also used for judging the recycling demand power of the motor and the allowable charging power of the battery when the electric automobile is in a deceleration state;
the device further comprises:
and the recovery module is used for recovering the maximum recovery power according to the allowed battery when the recovery required power of the motor is greater than the allowed charging power of the battery.
10. The apparatus of claim 9, wherein the recovery module is further configured to recover the required power according to the recovered required power of the motor when the recovered required power of the motor is less than or equal to the allowable charging power of the battery.
11. The device according to any one of claims 7 to 10, wherein the obtaining module is further configured to obtain an actual battery discharge power of the electric vehicle and an actual battery charge power of the electric vehicle;
the output module is further used for reducing the driving power of the driving motor by calculating the exceeding amplitude and the exceeding duration of the actual discharging power of the battery when the actual discharging power of the battery is detected to exceed the allowable discharging power of the battery;
the recovery module is further used for reducing the recovered power of the driving motor by calculating the exceeding amplitude and the exceeding duration of the actual charging power of the battery when the actual charging power of the battery is detected to exceed the allowable charging power of the battery;
the amplitude of the actual discharge power exceeding of the battery is the difference value between the actual discharge power of the battery and the allowable discharge power of the battery; the amplitude of the actual charging power exceeding of the battery is the difference value between the actual charging power of the battery and the allowable charging power of the battery.
12. The apparatus of claim 11, further comprising:
the calculation module is used for calculating the driving required power of the motor according to the current vehicle speed and the opening degree of an accelerator pedal;
calculating the allowable discharge power of the battery according to the voltage U of the battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomer;
calculating the required power recovered by the motor according to the current vehicle speed and the opening degree of a brake pedal;
calculating the allowable charging electric power of the battery according to the voltage U of the battery bus, the current I of the battery bus, the temperature of the battery, the SOC value of the battery and the maximum voltage difference of the battery monomers;
calculating the actual discharge power of the battery according to the voltage U of the battery bus and the current I of the battery bus;
and calculating the actual charging power of the battery according to the voltage U of the battery bus and the current I of the battery bus.
13. A vehicle-mounted terminal characterized by comprising:
a processor and at least one memory communicatively coupled to the processor, wherein the memory stores program instructions executable by the processor, and wherein the processor is capable of performing the method of any of claims 1 to 6 when invoked by the processor.
14. A non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the method of any of claims 1-6.
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| CN202111180154.XA CN113879176A (en) | 2021-10-11 | 2021-10-11 | Battery power control method and device for electric vehicle |
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