CN114619921A - Charging current adjusting method and device and electronic equipment - Google Patents

Charging current adjusting method and device and electronic equipment Download PDF

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Publication number
CN114619921A
CN114619921A CN202210336449.XA CN202210336449A CN114619921A CN 114619921 A CN114619921 A CN 114619921A CN 202210336449 A CN202210336449 A CN 202210336449A CN 114619921 A CN114619921 A CN 114619921A
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current
charging
vehicle
mode
difference value
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Granted
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CN202210336449.XA
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CN114619921B (en
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周斌
胡凡
刘友迪
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Hozon New Energy Automobile Co Ltd
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Hozon New Energy Automobile Co Ltd
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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]
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • 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
    • B60L2240/549—Current
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The application discloses a charging current adjusting method and device and electronic equipment, and relates to the technical field of electric vehicles. The charging current adjusting method comprises the following steps: and acquiring a difference value between the actual current currently input into the vehicle-mounted battery and the target current, judging a current interval range to which the difference value belongs, determining a current regulation mode corresponding to the current interval range, and regulating the required current requested to the charging power supply according to the current regulation mode. By the method, the overlarge difference value between the actual current and the target current can be effectively prevented, and the situations of low charging speed or overload charging can be avoided.

Description

Charging current adjusting method and device and electronic equipment
Technical Field
The present disclosure relates to the field of electric vehicles, and particularly, to a method and an apparatus for adjusting a charging current, and an electronic device.
Background
The electric vehicle is a vehicle which takes electric energy output by a battery as power and drives wheels to run by a motor, and meets various requirements of road traffic and safety regulations. With the rapid development of electric vehicles, the charging function has attracted considerable attention as an important function of electric vehicles. The charging current is used as a key index influencing the charging function, thereby not only influencing the charging efficiency of the battery, but also influencing the service life of the battery.
At the present stage, the vehicle end calculates chargeable current based on the current temperature and voltage of the vehicle-mounted battery, then sends required current to the charging pile according to the chargeable current, and the charging pile further charges the vehicle-mounted battery according to the required current. In the charging process, due to the existence of factors such as power fluctuation of the vehicle-mounted accessories or current errors output by the charging pile, the actual current input into the vehicle-mounted battery is inconsistent with the target current, wherein the target current is the current corresponding to the current chargeable capacity of the vehicle-mounted battery, and the charging speed is slow or the charging is overloaded.
Disclosure of Invention
The application discloses a charging current adjusting method, which can ensure consistency between actual current input into a vehicle-mounted battery and current maximum inputtable current of the vehicle-mounted battery, and effectively avoid the condition of low charging speed or overload charging.
In a first aspect, the present application provides a charging current adjusting method, including:
acquiring a difference value between an actual current currently input into the vehicle-mounted battery and a target current;
judging the current interval range to which the difference value belongs;
and determining a current regulation mode corresponding to the current interval range, and regulating the required current according to the current regulation mode, wherein the required current represents the current requested to the charging power supply.
By the method, the current adjusting mode for adjusting the required current is determined according to the current interval range to which the difference value between the actual current input into the vehicle-mounted battery and the target current belongs, so that the required current is adjusted, not only can frequent fluctuation of the actual current input into the vehicle-mounted battery be effectively avoided, but also the actual current input into the vehicle-mounted battery can be close to the target current, and the situations of low charging speed or overload charging can be effectively avoided.
Further, the adjusting the demand current according to the current adjusting method includes:
when the current regulation mode is a maintaining current mode, maintaining the required current;
when the current regulation mode is to increase the current, the required current is increased;
when the current regulation mode is to reduce the current, the required current is reduced.
By the method, the required current is maintained, increased or reduced, so that the actual current input into the vehicle-mounted battery is close to the target current, and the condition of low charging speed or overload charging is effectively avoided.
In one possible design, the adjusting the demand current in the current regulation manner includes:
determining a current regulation rate corresponding to the current regulation mode;
and adjusting the demand current according to the current adjustment rate.
By the method, the required current is adjusted according to the current adjusting rate corresponding to the current adjusting mode, the required current can be adjusted according to a larger rate when the difference value between the actual current input into the vehicle-mounted battery and the target current is larger, and the required current is adjusted according to a smaller rate when the difference value is smaller, so that the actual current input into the vehicle-mounted battery approaches the target current, and the situations of low charging speed or overload charging are effectively avoided.
Further, the determining a current adjustment rate corresponding to the current adjustment manner includes:
determining a corresponding subinterval of the difference value in the current interval range;
determining a speed value corresponding to the subinterval;
and taking the speed value as the current regulation speed corresponding to the current regulation mode.
By the method, the current regulation rate corresponding to the current regulation mode is determined based on the subinterval corresponding to the difference value in the current interval range, so that not only can frequent fluctuation of the actual current of the input vehicle-mounted battery be effectively avoided, but also the required current can be regulated at different rates according to different difference values, the actual current of the input vehicle-mounted battery is close to the target current, and the situations of low charging speed or overload charging are effectively avoided.
In one possible design, before the obtaining the difference between the actual current currently input to the vehicle-mounted battery and the target current, the method further includes:
calculating the corresponding consumed current of the vehicle-mounted accessory;
summing the target current and the consumption current to obtain a required current;
and detecting the actual current input into the vehicle-mounted battery in real time after the charging power supply is requested for the required current.
By the method, the power of the vehicle-mounted accessory can be effectively prevented from consuming the required current, so that the actual current input into the vehicle-mounted battery is ensured to be closer to the chargeable current of the vehicle-mounted battery, and the charging capability of the vehicle-mounted battery is fully exerted.
In a second aspect, the present application provides a charge current regulation device, the device comprising:
the acquisition module is used for acquiring a difference value between an actual current and a target current which are currently input into the vehicle-mounted battery;
the judging module is used for judging the current interval range to which the difference value belongs;
and the adjusting module is used for determining a current adjusting mode corresponding to the current interval range and adjusting the required current according to the current adjusting mode, wherein the required current represents the current requested to the charging power supply.
Further, the adjusting module is specifically configured to:
when the current regulation mode is a maintaining current mode, maintaining the required current;
when the current regulation mode is to increase the current, the required current is increased;
when the current regulation mode is to reduce the current, the required current is reduced.
In one possible design, the adjustment module includes:
the determining unit is used for determining the current adjusting rate corresponding to the current adjusting mode;
and the regulating unit is used for regulating the required current according to the current regulating rate.
Further, the determining unit is specifically configured to:
determining a corresponding subinterval of the difference value in the current interval range;
determining a speed value corresponding to the subinterval;
and taking the speed value as the current regulation speed corresponding to the current regulation mode.
In one possible design, the apparatus further includes:
the calculating module is used for calculating the consumed current corresponding to the vehicle-mounted accessory; summing the target current and the consumption current to obtain a required current;
and the detection module is used for detecting the actual current input into the vehicle-mounted battery in real time after the charging power supply requests the required current.
In a third aspect, the present application provides an electronic device, comprising:
a memory for storing a computer program;
and the processor is used for realizing the steps of the charging current regulating method when executing the computer program stored in the memory.
In a fourth aspect, the present application provides a computer readable storage medium having stored therein a computer program which, when executed by a processor, implements the above-described charging current method steps.
Based on the charging current adjusting method, the current adjusting mode for adjusting the required current is determined according to the current interval range to which the difference value between the actual current and the target current of the input vehicle-mounted battery belongs, so that the required current is adjusted, not only can frequent fluctuation of the actual current of the input vehicle-mounted battery be effectively avoided, but also the actual current of the input vehicle-mounted battery can be enabled to be close to the target current, and the situations of low charging speed or overload of charging can be effectively avoided.
For each of the second to fourth aspects and possible technical effects of each aspect, reference is made to the above description of the possible technical effects of the first aspect or various possible schemes of the first aspect, and repeated description is omitted here.
Drawings
Fig. 1 is a flowchart of a charging current adjusting method provided in the present application;
fig. 2 is an exemplary diagram of a charging current adjustment method provided herein;
fig. 3 is a schematic structural diagram of a charging current regulating device provided in the present application;
fig. 4 is a schematic structural diagram of an electronic device provided in the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings. The particular methods of operation in the method embodiments may also be applied in device embodiments or system embodiments. It should be noted that "a plurality" is understood as "at least two" in the description of the present application. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. A is connected with B and can represent: a and B are directly connected and A and B are connected through C. In addition, in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not intended to indicate or imply relative importance nor order to be construed.
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
At the present stage, the vehicle end calculates chargeable current based on the current temperature and voltage of the vehicle-mounted battery, then sends required current to the charging pile according to the chargeable current, and the charging pile further charges the vehicle-mounted battery according to the required current. For example, under the current conditions of the temperature and the voltage of the vehicle-mounted battery, the chargeable current of the vehicle-mounted battery is 100A, at this time, the vehicle end requests the 100A required current from the charging pile, and as long as the charging pile can achieve the capability of outputting the 100A current, the 100A current is output to charge the vehicle-mounted battery.
However, during the charging process, due to the power consumption of the vehicle-end accessories, such as the operating power of the dc converter, the air conditioner starting power, and the like, the actual current input into the vehicle-mounted battery is usually smaller than the maximum chargeable current of the vehicle-mounted battery, and the charging efficiency is affected. For example, when the current output by the charging pile is 100A, wherein 5A current is used for maintaining the operation of the dc converter, 10A current is used for maintaining the on-state of the air conditioner, the actual current actually input into the vehicle-mounted battery is only 85A, and the chargeable capacity of the battery is actually achieved (100A).
In addition, due to the existence of factors such as power variation of vehicle-end accessories and current error output by the charging pile, the actual current input into the vehicle-mounted battery is usually smaller than the maximum chargeable current of the vehicle-mounted battery, and even the actual current instantaneously exceeds the maximum chargeable current of the vehicle-mounted battery, so that charging overload is caused. For example, during the charging process, the air conditioner is started, at this time, a required current of 115A is requested from the charging pile, and the charging pile outputs current according to 115A, wherein 5A current is used for maintaining the operation of the direct current converter, 10A current is used for maintaining the starting of the air conditioner, and 100A current is used for charging the vehicle-mounted battery. In the charging process, if the vehicle-mounted air conditioner is turned off, the required current is immediately reduced, and the required current is smaller than 105A and is not 115A in the prior art by considering the error factor of the output current of the charging pile. If the driver frequently opens and closes the air conditioner in the process of quick charging to cause the rapid change of the actual current, the charging current of the vehicle-mounted battery is easy to fluctuate frequently, and the charging safety is not facilitated.
In order to solve the above problems, the present application provides a charging current adjusting method, which determines a current adjusting mode for adjusting a required current according to a current interval range to which a difference value between an actual current and a target current input to a vehicle-mounted battery belongs, so as to adjust the required current, thereby not only effectively avoiding frequent fluctuation of the actual current input to the vehicle-mounted battery, but also enabling the actual current input to the vehicle-mounted battery to approach the target current, and effectively avoiding a situation of a slow charging speed or an overload charging. The method and the device in the embodiment of the application are based on the same technical concept, and because the principles of the problems solved by the method and the device are similar, the device and the embodiment of the method can be mutually referred, and repeated parts are not repeated.
As shown in fig. 1, a flowchart of a charging current adjusting method provided in the present application specifically includes the following steps:
s11, acquiring the difference value between the actual current and the target current of the current input vehicle-mounted battery;
in the embodiment of the application, the vehicle end calculates the required current, the required current is sent to the charging power supply, such as a charging pile, and then the charging power supply charges the vehicle-mounted battery according to the required current sent by the vehicle end. In the charging process, the optimal charging state of the vehicle-mounted battery is charging according to the current maximum chargeable current, so that the charging efficiency can be ensured, and the charging safety of the vehicle-mounted battery cannot be influenced. Obviously, when conditions such as the usage state and usage environment of the vehicle-mounted battery change, the target current is also adjusted accordingly.
In the above process, the calculation of the required current will directly affect the actual current entering the vehicle power supply, and in the embodiment of the present application, the method for calculating the required current includes:
and calculating the corresponding consumption current of the vehicle-mounted accessory, and summing the target current and the consumption current to obtain the required current. The consumed current is current consumed when the vehicle-mounted accessory operates, such as current consumption caused by air conditioner starting, direct current converter operation and the like. The target current may be calculated from the current temperature and voltage of the on-board battery.
Further, the required current is sent to the charging power supply, and then the actual current input to the on-vehicle battery is detected in real time.
By the method, the influence of the vehicle-mounted accessories is considered when the required current is calculated, the fact that the actual current input into the vehicle-mounted battery is adaptive to the chargeable capacity of the vehicle-mounted battery can be guaranteed, the chargeable capacity of the vehicle-mounted battery is fully exerted, and the charging efficiency is improved under the condition that the charging safety of the vehicle-mounted battery is guaranteed.
After the required current is calculated, when the charging power supply charges the vehicle-mounted battery according to the required current, an error may exist between the output current of the charging power supply and the required current, so that a difference exists between the actual current entering the vehicle-mounted battery and the target current, and the charging speed is slow or the charging overload is caused.
In order to solve the above problem, in the embodiment of the present application, the vehicle end first calculates a difference between an actual current currently input to the vehicle-mounted battery and a target current, and then adjusts a required current requested to the charging power supply according to the difference.
S12, judging the current interval range to which the difference value belongs;
in the embodiment of the present application, after obtaining the difference, further, a current interval range to which the difference belongs is determined, where the current interval range mainly includes 3 current interval ranges, and the end points of the 3 current interval ranges are composed of 4 different preset thresholds, specifically, a first current interval range is formed between a first preset threshold and a second preset threshold, a second current interval range is formed between the second preset threshold and a third preset threshold, and a third current interval range is formed between the third preset threshold and a fourth preset threshold.
And S13, determining a current regulation mode corresponding to the current interval range, and regulating the required current according to the current regulation mode.
In the embodiment of the present application, each current interval range corresponds to a current adjustment mode, wherein the current adjustment mode includes maintaining current, increasing current and decreasing current, specifically:
when the difference value is within the first interval range, the difference value is between a first preset threshold value and a second preset threshold value, at the moment, the actual current input into the vehicle-mounted battery is smaller than the target current, the difference between the actual current and the target current is large, the current adjusting mode is to increase the current, and then the vehicle end increases the required current according to the current adjusting mode.
For example, when the target current I1100A, actual current I2In the range (0A, 98A), I2And I1The difference between them is in the range of (-100A, -2A). At this time, the current adjustment method corresponding to the first interval range is to increase the current, so the required current requested to the charging power supply is increased according to the current adjustment method until the difference value enters the second current interval range.
In the embodiment of the present application, when the difference value belongs to the second current interval range, it indicates that the difference value is between the second preset threshold value and the third preset threshold value, and at this time, the actual current input to the vehicle-mounted battery is considered to be in a steady state and to be close to the target current. For example, when the target current I1100A, actual current I2The current interval range is [98A, 101A ]]When, I2And I1The current range interval of the difference value is [ -2A, 1A]. At this time, the current regulation mode corresponding to the second current interval range is the maintaining current, so as to maintain the current required by the charging power supply.
In a possible application scenario, when the difference value belongs to a third current interval range, the difference value is between a third preset threshold and a fourth preset threshold, at this time, the actual current input into the vehicle-mounted battery is considered to be larger than the target current, the difference between the actual current and the target current is larger, the current regulation mode is to reduce the current, and then the vehicle end reduces the required current according to the current regulation mode.
For example, when the target current I1100A, actual current I2In the range (120A, 101A), I2And I1The current range interval in which the difference between them is (1A, 20A). At this time, the current regulation mode corresponding to the first interval range is to increase the current, so the required current requested to the charging power supply is reduced according to the current regulation mode until the difference value enters the second current intervalThe range [ -2A, 1A ]]。
By means of the method, the required current is increased, maintained or reduced, so that the actual current input into the vehicle-mounted battery is close to the target current, and the situation that the charging speed is low or the charging is overloaded is effectively avoided.
In one possible design, when the current adjustment mode is determined and the required current requested to the charging power supply is adjusted according to the current adjustment mode, the required current may be adjusted at different current adjustment rates according to different differences, where the specific adjustment method includes:
determining a current regulation rate corresponding to the current regulation mode, wherein the specific determination method of the current regulation rate may be: and determining a subinterval corresponding to the current difference value in the range of the current interval, determining a speed value corresponding to the subinterval, taking the speed value as a current regulation rate corresponding to a current regulation mode, and finally regulating the required current according to the current regulation rate.
Specifically, when the current difference value belongs to the first current interval range, the demand current requested from the charging power supply should be increased, and the specific increase rate is different because the difference value corresponds to a different sub-interval within the current interval range to which the current difference value belongs. If the current difference value belongs to a first subinterval in the first current interval range, the difference value between the actual current and the target current of the current input vehicle-mounted battery needs to be rapidly reduced until the difference value enters a second interval current range; if the current difference value belongs to a second subinterval within the first current interval range, the difference value between the actual current input into the vehicle-mounted battery and the target current needs to be slowly reduced until the difference value enters a second interval current range.
For example, the first current interval is (-100A, -2A), the first sub-interval is (-100A, -5A), and the second interval is (-5A, -2A), the demand current is increased at a current regulation rate of 0.5A/s when the difference is in the first sub-interval, and the demand current is increased at a current regulation rate of 0.1A/s when the difference is in the second sub-interval.
When the current difference value belongs to the second current interval range, the corresponding current regulation rate is zero.
When the current difference value falls within the third current interval range, the demand current requested from the charging power supply should be reduced, and the specific reduction rate is different because the difference value is different for different subintervals within the current interval range to which the current difference value falls. If the current difference value belongs to a third subinterval within a third current interval range, the difference value between the actual current currently input into the vehicle-mounted battery and the target current needs to be slowly reduced until the difference value enters a second interval current range; and if the current difference value belongs to a fourth subinterval in the third current interval range, the difference value between the actual current currently input into the vehicle-mounted battery and the target current needs to be quickly reduced until the difference value enters the second interval current range.
For example, the first current interval is (1A, 20A), the first sub-interval is (1A, 3A), and the second interval is (3A, 20A), and when the difference is in the first sub-interval, the demand current is decreased at the current adjustment rate of 0.5A/s, and when the difference is in the second sub-interval, the demand current is decreased at the current adjustment rate of 0.1A/s.
In the process, the required current is adjusted according to the current adjusting rate corresponding to the current adjusting mode, the required current can be adjusted according to a larger rate when the difference value between the actual current input into the vehicle-mounted battery and the target current is larger, and the required current is adjusted according to a smaller rate when the difference value is smaller, so that the actual current input into the vehicle-mounted battery approaches to the target current, and the condition that the charging speed is low or the charging is overloaded is effectively avoided.
Based on the charging current adjusting method, the current adjusting mode for adjusting the required current is determined according to the current interval range to which the difference value between the actual current and the target current of the input vehicle-mounted battery belongs, so that the required current is adjusted, not only can frequent fluctuation of the actual current of the input vehicle-mounted battery be effectively avoided, but also the actual current of the input vehicle-mounted battery can be enabled to be close to the target current, and the situations of low charging speed or overload of charging can be effectively avoided.
In order to explain a charging current adjusting method in the embodiment of the present application in detail, the method provided in the present application is described in detail below through a specific application scenario. As shown in fig. 2, the process of requesting a fast charging current in the fast charging process of an electric vehicle mainly includes 6 processes:
(1) calculating the target required current: after the quick charging is started, the target current I corresponding to the chargeable capacity of the battery is calculated according to the current temperature of the battery and the lowest/highest voltage of the single body1(ii) a And meanwhile, considering the power of the vehicle-mounted accessory, and obtaining the required current requested by the pile according to the rechargeable capacity of the battery and the power of the accessory.
(2) Fast charge request current steady state: after the required current is obtained through calculation, a request is sent to a charging pile, and meanwhile the actual current I entering the battery is obtained in real time2When I is1And I2Within a predetermined range, e.g. I1＝100A，I2Decrease of I1When the current value is smaller than 1A and larger than-2A, a request is continuously sent to the charging pile according to the current required current value, at the moment, the vehicle end accessory normally works, and the charging capacity of the battery is fully exerted.
(3) The fast charge request current slowly increases the state: when the actual current input into the battery is found to be smaller than the target current of the current battery, and the difference value exceeds the slow increase threshold value HZBut the difference is less than the fast increase threshold KZAt this time, the required current is slowly increased so that the actual current entering the battery returns to a steady state. For example, I1＝100A，95A＜I2If < 98A, the required current value is increased in smaller steps, for example 0.1A/s, until I1Between 98 and 101A.
(4) A rapid charging request current rapid increasing state: when the actual current entering the battery is found to be the target current of the current battery, and the difference is larger than or equal to the rapid increase threshold KZThe demand current is rapidly increased so that the actual current into the battery returns to steady state. For example, I1＝100A，I2< 95A, the demanded current is increased in larger steps, for example 0.5A/s, up to I2Between 98 and 101A.
(5) Fast charging currentSlow decrease state: when the actual current entering the battery is found to be larger than the target current of the current battery, and the difference value exceeds the slow reduction threshold value HJBut less than the fast-decrease threshold KJIn this case, the required current is slowly reduced, so that the actual current entering the battery returns to a steady state. For example, I1＝100A，103A＞I2At > 101A, the required current is reduced in smaller steps, for example 0.1A/s, until I2Between 98 and 101A.
(6) Fast charge current fast reduction state: when the actual current entering the battery is found to be larger than the target current of the current battery, and the difference is larger than or equal to the rapid reduction threshold KJIn time, the demand current is rapidly increased, so that the actual current entering the battery returns to a steady state. For example, I1＝100A，I2At > 103A, the required current is reduced in larger steps, e.g. 0.5A/s, up to I2Between 98 and 101A.
In the quick charging process, the actual current entering the battery can be accurately charged according to the current target current of the battery through the calculation and adjustment of the states, and the charging capacity of the battery is fully exerted. Simultaneously through setting up two kinds of states of quick adjustment and slow adjustment, demand current and actual current fluctuation that can effectually avoid causing because of the power fluctuation of on-vehicle annex and fill electric pile output current error etc. reason. The charging capacity of the battery can be exerted, the charging safety of the battery is also considered, and the charging overload condition is prevented from occurring in the charging and adjusting process.
Based on the same inventive concept, an embodiment of the present application further provides a charging current adjusting device, as shown in fig. 3, which is a schematic structural diagram of the charging current adjusting device in the present application, and the device includes:
the acquiring module 31 is configured to acquire a difference between an actual current currently input to the vehicle-mounted battery and a target current, where the target current represents a current chargeable capability of the vehicle-mounted battery and corresponds to the current chargeable capability;
the judging module 32 is configured to judge a current interval range to which the difference value belongs;
and an adjusting module 33, configured to determine a current adjusting manner corresponding to the current interval range, and adjust a required current according to the current adjusting manner, where the required current represents a current requested by the charging power supply.
Further, the adjusting module 33 is specifically configured to:
when the current regulation mode is a maintaining current mode, maintaining the required current;
when the current regulation mode is to increase the current, the required current is increased;
when the current regulation mode is to reduce the current, the required current is reduced.
In one possible design, the adjustment module 33 includes:
the determining unit is used for determining the current adjusting rate corresponding to the current adjusting mode;
and the regulating unit is used for regulating the required current according to the current regulating rate.
Further, the determining unit is specifically configured to:
determining a corresponding subinterval of the difference value in the current interval range;
determining a speed value corresponding to the subinterval;
and taking the speed value as the current regulation speed corresponding to the current regulation mode.
In one possible design, the apparatus further includes:
the calculating module is used for calculating the consumed current corresponding to the vehicle-mounted accessory; summing the target current and the consumption current to obtain a required current;
and the detection module is used for detecting the actual current input into the vehicle-mounted battery in real time after the charging power supply requests the required current.
Based on above-mentioned charging current adjusting device, according to the electric current interval scope that the difference belongs to between the actual current of input on-vehicle battery and the target current, confirm the current regulation mode who is used for adjusting the demand current, and then realize adjusting the demand current, not only can effectively avoid the frequent fluctuation of the actual current of input on-vehicle battery, can also make the actual current of input on-vehicle battery approach the target current, effectively avoid the slow or overload's that charges condition takes place of charging speed.
Based on the same inventive concept, an embodiment of the present application further provides an electronic device, where the electronic device can implement the functions of the foregoing charging current adjusting method and apparatus, and with reference to fig. 4, the electronic device includes:
at least one processor 41, and a memory 42 connected to the at least one processor 41, in this embodiment, a specific connection medium between the processor 41 and the memory 42 is not limited, and fig. 4 illustrates an example where the processor 41 and the memory 42 are connected through a bus 40. The bus 40 is shown in fig. 4 by a thick line, and the connection manner between other components is merely illustrative and not limited thereto. The bus 40 may be divided into an address bus, a data bus, a control bus, etc., and is shown with only one thick line in fig. 4 for ease of illustration, but does not represent only one bus or type of bus. Alternatively, processor 41 may also be referred to as a controller, without limitation to name a few.
In the embodiment of the present application, the memory 42 stores instructions executable by the at least one processor 41, and the at least one processor 41 may execute the charging current adjusting method discussed above by executing the instructions stored in the memory 42. The processor 41 may implement the functions of the various modules in the apparatus shown in fig. 3.
The processor 41 is a control center of the apparatus, and may connect various parts of the entire control device by using various interfaces and lines, and perform various functions of the apparatus and process data by operating or executing instructions stored in the memory 42 and calling up data stored in the memory 42, thereby performing overall monitoring of the apparatus.
In one possible design, processor 41 may include one or more processing units, and processor 41 may integrate an application processor, which primarily handles operating systems, user interfaces, application programs, and the like, and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 41. In some embodiments, processor 41 and memory 42 may be implemented on the same chip, or in some embodiments, they may be implemented separately on separate chips.
The processor 41 may be a general-purpose processor, such as a Central Processing Unit (CPU), digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like, that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the charging current adjusting method disclosed in the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.
Memory 42, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The Memory 42 may include at least one type of storage medium, and may include, for example, a flash Memory, a hard disk, a multimedia card, a card-type Memory, a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Programmable Read Only Memory (PROM), a Read Only Memory (ROM), a charge Erasable Programmable Read Only Memory (EEPROM), a magnetic Memory, a magnetic disk, an optical disk, and the like. The memory 42 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. The memory 42 in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.
The processor 41 is programmed to solidify the code corresponding to the charging current adjusting method described in the foregoing embodiment into the chip, so that the chip can execute the steps of the charging current adjusting method of the embodiment shown in fig. 1 when running. How to program the processor 41 is well known to those skilled in the art and will not be described in detail here.
Based on the same inventive concept, the present application also provides a storage medium storing computer instructions, which when executed on a computer, cause the computer to perform the charging current adjusting method discussed above.
In some possible embodiments, the various aspects of the charging current adjustment method provided herein may also be implemented in the form of a program product comprising program code for causing a control device to perform the steps of the charging current adjustment method according to various exemplary embodiments of the present application described above in this specification, when the program product is run on an apparatus.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (12)

1. A method of regulating a charging current, the method comprising:
acquiring a difference value between an actual current currently input into the vehicle-mounted battery and a target current;
judging the current interval range to which the difference value belongs;
and determining a current regulation mode corresponding to the current interval range, and regulating the required current according to the current regulation mode, wherein the required current represents the current requested to the charging power supply.
2. The method of claim 1, wherein said regulating the demand current in said current regulation manner comprises:
when the current regulation mode is a maintaining current mode, maintaining the required current;
when the current regulation mode is to increase the current, the required current is increased;
when the current regulation mode is to reduce the current, the required current is reduced.
3. The method of claim 1, wherein said regulating said demand current in said current regulation manner comprises:
determining a current regulation rate corresponding to the current regulation mode;
and adjusting the demand current according to the current adjustment rate.
4. The method of claim 3, wherein the determining a current adjustment rate for the current adjustment mode comprises:
determining a corresponding subinterval of the difference value in the current interval range;
determining a speed value corresponding to the subinterval;
and taking the speed value as the current regulation speed corresponding to the current regulation mode.
5. The method of claim 1, wherein prior to said obtaining a difference between an actual current currently input to the on-board battery and a target current, further comprising:
calculating the corresponding consumed current of the vehicle-mounted accessory;
summing the target current and the consumption current to obtain a required current;
and detecting the actual current input into the vehicle-mounted battery in real time after the demand current is requested to the charging power supply.
6. A charging current regulating device, comprising:
the acquisition module is used for acquiring a difference value between an actual current and a target current which are currently input into the vehicle-mounted battery;
the judging module is used for judging the current interval range to which the difference value belongs;
and the adjusting module is used for determining a current adjusting mode corresponding to the current interval range and adjusting the required current according to the current adjusting mode, wherein the required current represents the current requested to the charging power supply.
7. The apparatus of claim 6, wherein the adjustment module is specifically configured to:
when the current regulation mode is a maintaining current mode, maintaining the required current;
when the current regulation mode is to increase the current, the required current is increased;
when the current regulation mode is to reduce the current, the required current is reduced.
8. The apparatus of claim 6, wherein the adjustment module comprises:
the determining unit is used for determining the current adjusting rate corresponding to the current adjusting mode;
and the regulating unit is used for regulating the required current according to the current regulating rate.
9. The apparatus as claimed in claim 8, wherein said determining unit is specifically configured to:
determining a corresponding subinterval of the difference value in the current interval range;
determining a speed value corresponding to the subinterval;
and taking the speed value as the current regulation speed corresponding to the current regulation mode.
10. The apparatus of claim 6, wherein the apparatus further comprises:
the calculating module is used for calculating the consumed current corresponding to the vehicle-mounted accessory; summing the target current and the consumption current to obtain a required current;
and the detection module is used for detecting the actual current input into the vehicle-mounted battery in real time after the charging power supply requests the required current.
11. An electronic device, comprising:
a memory for storing a computer program;
a processor for implementing the method steps of any one of claims 1-5 when executing the computer program stored on the memory.
12. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method steps of any one of claims 1-5.
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