CN114619921B - Charging current adjusting method and device and electronic equipment - Google Patents
Charging current adjusting method and device and electronic equipment Download PDFInfo
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- CN114619921B CN114619921B CN202210336449.XA CN202210336449A CN114619921B CN 114619921 B CN114619921 B CN 114619921B CN 202210336449 A CN202210336449 A CN 202210336449A CN 114619921 B CN114619921 B CN 114619921B
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- 230000033228 biological regulation Effects 0.000 claims abstract description 57
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- 238000004590 computer program Methods 0.000 claims description 13
- 238000012423 maintenance Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 10
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Classifications
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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
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- 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
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- 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
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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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- 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
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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
- 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, a charging current adjusting device and electronic equipment, and relates to the technical field of electric vehicles. The charging current adjusting method comprises the following steps: and obtaining a difference value between the actual current and the target current of the currently input vehicle-mounted battery, 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 required by the charging power supply according to the current regulation mode. By the method, the situation that the difference between the actual current and the target current is too large and the charging speed is low or the charging is overloaded is avoided.
Description
Technical Field
The application relates to the technical field of electric vehicles, in particular to a charging current adjusting method, a charging current adjusting device and electronic equipment.
Background
The electric vehicle is a vehicle which uses electric energy output by a battery as power and uses a motor to drive wheels to run and meets various requirements of road traffic and safety regulations. With the rapid development of electric vehicles, a charging function has been attracting attention as an important function of electric vehicles. The charging current is used as a key index for influencing the charging function, so that the charging efficiency of the battery is influenced, and the service life of the battery is also influenced.
At present, the vehicle end calculates chargeable current based on the temperature and the voltage of the current vehicle-mounted battery, then the chargeable current is sent to the charging pile, and the charging pile charges the vehicle-mounted battery according to the chargeable current. In the charging process, due to factors such as power fluctuation of the vehicle-mounted accessory or current error 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 low or the charging overload condition is caused.
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 input current of the vehicle-mounted battery, and effectively avoid the condition of low charging speed or charging overload.
In a first aspect, the present application provides a charging current adjustment method, including:
acquiring a difference value between an actual current and a target current of a currently input vehicle-mounted battery;
judging the current interval range of the difference value;
and determining a current regulation mode corresponding to the current interval range, and regulating a required current according to the current regulation mode, wherein the required current represents a current requested to a charging power supply.
According to the method, the current regulation mode for regulating the required current is determined according to the current interval range of the difference value between the actual current and the target current of the input vehicle-mounted battery, so that the required current is regulated, frequent fluctuation of the actual current of the input vehicle-mounted battery can be effectively avoided, the actual current of the input vehicle-mounted battery is close to the target current, and the conditions of low charging speed or charging overload are effectively avoided.
Further, the adjusting the required current according to the current adjustment mode includes:
when the current regulation mode is a maintenance current mode, maintaining the required current;
when the current regulation mode is to increase current, increasing the required current;
and when the current regulation mode is to reduce the current, reducing the required current.
By the method, the required current is maintained, increased or reduced, so that the actual current input into the vehicle-mounted battery approaches to the target current, and the condition of low charging speed or overload charging is effectively avoided.
In one possible design, the adjusting the required current according to the current adjustment mode includes:
determining a current regulation rate corresponding to the current regulation mode;
and adjusting the required current according to the current adjustment rate.
By the method, the required current is regulated according to the current regulation rate corresponding to the current regulation mode, so that the required current is regulated according to the larger rate when the difference between the actual current and the target current of the input vehicle-mounted battery is larger, and the required current is regulated according to the smaller rate when the difference is smaller, thereby enabling the actual current of the input vehicle-mounted battery to approach the target current, and effectively avoiding the situations of slow charging speed or overload charging.
Further, the determining the current regulation rate corresponding to the current regulation mode includes:
determining a sub-interval corresponding to the difference value in the current interval range;
determining a rate value corresponding to the subinterval;
and taking the speed value as a current regulation speed corresponding to the current regulation mode.
According to 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 frequent fluctuation of the actual current of the input vehicle-mounted battery can be effectively avoided, the required current can be regulated by adopting different rates according to the difference value, the actual current of the input vehicle-mounted battery is ensured to be close to the target current, and the conditions of slow charging speed or overload charging are effectively avoided.
In one possible design, before the obtaining the difference between the actual current of the currently input vehicle-mounted battery and the target current, the method further includes:
calculating the consumption current corresponding to the vehicle-mounted accessory;
summing the target current and the consumption current to obtain a required current;
and after the required current is requested to the charging power supply, detecting the actual current input into the vehicle-mounted battery in real time.
By the method, the consumption of the power of the vehicle-mounted accessory to the required current can be effectively avoided, 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 charging current adjustment device, the device comprising:
the acquisition module is used for acquiring the difference value between the actual current and the target current of the currently input vehicle-mounted battery;
the judging module is used for judging the current interval range of the difference value;
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 maintenance current mode, maintaining the required current;
when the current regulation mode is to increase current, increasing the required current;
and when the current regulation mode is to reduce the current, reducing the required current.
In one possible design, the adjustment module comprises:
the determining unit is used for determining a current regulation rate corresponding to the current regulation mode;
and the adjusting unit is used for adjusting the required current according to the current adjusting rate.
Further, the determining unit is specifically configured to:
determining a sub-interval corresponding to the difference value in the current interval range;
determining a rate value corresponding to the subinterval;
and taking the speed value as a current regulation speed corresponding to the current regulation mode.
In one possible design, the apparatus further comprises:
the calculation module is used for calculating the consumption 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 required current is requested to the charging power supply.
In a third aspect, the present application provides an electronic device, including:
a memory for storing a computer program;
and the processor is used for realizing the steps of the charging current adjusting method when executing the computer program stored in the memory.
In a fourth aspect, the present application provides a computer readable storage medium having a computer program stored therein, 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 of the difference value between the actual current and the target current of the input vehicle-mounted battery, so that the required current is adjusted, frequent fluctuation of the actual current of the input vehicle-mounted battery can be effectively avoided, the actual current of the input 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.
The technical effects of each of the second to fourth aspects and the technical effects that may be achieved by each aspect are described above with reference to the first aspect or the technical effects that may be achieved by each possible aspect in the first aspect, and the description is not repeated here.
Drawings
Fig. 1 is a flowchart of a charging current adjustment method provided in the present application;
FIG. 2 is an exemplary diagram of a charge current adjustment method provided herein;
fig. 3 is a schematic structural diagram of a charging current adjusting device provided in the present application;
fig. 4 is a schematic structural diagram of an electronic device provided in the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings. The specific method of operation in the method embodiment may also be applied to the device embodiment or the system embodiment. It should be noted that "a plurality of" is understood as "at least two" in the description of the present application. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. A is connected with B, and can be represented as follows: both cases of direct connection of A and B and connection of A and B through C. In addition, in the description of the present application, the words "first," "second," and the like are used merely for distinguishing between the descriptions and not be construed as indicating or implying a relative importance or order.
Embodiments of the present application are described in detail below with reference to the accompanying drawings.
At present, the vehicle end calculates chargeable current based on the temperature and the voltage of the current vehicle-mounted battery, then the chargeable current is sent to the charging pile, and the charging pile charges the vehicle-mounted battery according to the chargeable current. For example, under the current temperature and voltage conditions of the vehicle-mounted battery, the chargeable current of the vehicle-mounted battery is 100A, and at this time, the vehicle end requests the charging pile for the required current of 100A, and as long as the charging pile can achieve the capability of outputting the current of 100A, the charging pile outputs the current of 100A to charge the vehicle-mounted battery.
However, during charging, the actual current input to the vehicle battery is generally smaller than the maximum chargeable current of the vehicle battery due to power consumption of the vehicle-end accessory, such as the operating power of the dc converter, the air conditioner on-power, and the like, thereby affecting the charging efficiency. For example, when the current output by the charging pile is 100A, 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 the actual current actually input into the vehicle-mounted battery is only 85A, so that the battery can be charged (100A).
In addition, due to factors such as power variation of the vehicle-end accessory, current error of the charging pile output 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, even the actual current instantaneously exceeds the maximum chargeable current of the vehicle-mounted battery, and charging overload is caused. For example, the air conditioner is turned on during the charging process, at this time, a demand current of 115A is requested to the charging pile, and the charging pile outputs a current according to 115A, 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, 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 should be immediately reduced, and the error factor of the output current of the charging pile is considered, so that the required current should be less than 105A instead of 115A. If the air conditioner is frequently turned on and off by a driver in the quick charging process, the actual current is changed rapidly, so that the charging current of the vehicle-mounted battery is easy to frequently fluctuate, and the charging safety is not facilitated.
In order to solve the problems, the application provides a charging current adjusting method, which is used for determining a current adjusting mode for adjusting a required current according to a current interval range of a difference value between an actual current and a target current of an input vehicle-mounted battery, so that the required current is adjusted, frequent fluctuation of the actual current of the input vehicle-mounted battery can be effectively avoided, the actual current of the input vehicle-mounted battery is close to the target current, and the situation that the charging speed is slow or the charging is overloaded is effectively avoided. The method and the device according to the embodiments of the present 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 embodiments of the device and the method can be referred to each other, and the repetition is 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, obtaining a difference value between the actual current of the currently input vehicle-mounted battery and the target current;
in the embodiment of the application, the vehicle end calculates the required current, then sends the required current to the charging power source, such as a charging pile, and then the charging power source charges the vehicle-mounted battery according to the required current sent by the vehicle end. In the charging process, the optimal state of the charging of the vehicle-mounted battery is to charge according to the current maximum chargeable current, so that the charging efficiency can be ensured, the charging safety of the vehicle-mounted battery can not be affected, the maximum chargeable current is taken as the target current of the vehicle-mounted battery, and the target current can be adjusted according to actual conditions, namely, the target current corresponds to the current chargeable capacity of the vehicle-mounted battery. Obviously, when conditions such as the use state and the use environment of the vehicle-mounted battery change, the target current is adjusted accordingly.
In the above process, the calculation of the required current will directly affect the actual current entering the vehicle-mounted power supply, and in the embodiment of the present application, the method for calculating the required current includes:
and calculating the consumption current corresponding to the vehicle-mounted accessory, and then summing the target current and the consumption current to obtain the required current. The consumed current is the current consumed when the vehicle-mounted accessory operates, such as the current consumed caused by the starting of an air conditioner, the operation of a direct current converter and the like. The target current may be calculated based on the temperature and voltage of the current vehicle battery.
Further, the required current is sent to the charging power supply, and then the actual current input to the vehicle-mounted battery is detected in real time.
By the method, the influence of the vehicle-mounted accessory is considered when the required current is calculated, so that the actual current input into the vehicle-mounted battery is matched with the chargeable capacity of the vehicle-mounted battery, 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 ensured.
After the required current is calculated, because the output current of the charging power supply may have an error with the required current when the charging power supply charges the vehicle-mounted battery according to the required current, 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 condition occurs.
In order to solve the above-described 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 demand current requested to the charging power source according to the difference.
S12, judging a current interval range to which the difference value belongs;
in this embodiment of the present application, after the difference value is obtained, a current interval range to which the difference value belongs is further determined, where the current interval ranges mainly include 3, endpoints 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.
S13, determining a current regulation mode corresponding to the current interval range, and regulating the required current according to the current regulation mode.
In this embodiment, each current interval corresponds to a current adjustment mode, where the current adjustment mode includes maintaining current, increasing current, and decreasing current, specifically:
when the difference value is in the first interval range, the difference value is indicated to be 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 I 1 =100deg.A, actual current I 2 In the range (0A, 98A), I 2 And I 1 The current range interval in which the difference between them is located is (-100A, -2A). At this time, since the current adjustment method corresponding to the first section range is to increase the current, the current demand requested from the charging power supply is increased according to the current adjustment method until the difference value enters the second current section range.
In this embodiment of the present application, when the difference value falls within the second current interval range, it is indicated 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 inSteady state and close to the target current. For example, when the target current I 1 =100deg.A, actual current I 2 The current range is [98A,101A ]]When I 2 And I 1 The difference between them is located in the current range interval [ -2A,1A]. At this time, the current adjustment mode corresponding to the second current interval range is a maintaining current, so as to maintain the current required by the charging power supply.
In one possible application scenario, when the difference value belongs to the third current interval range, it indicates that the difference value is between the third preset threshold value and the fourth preset threshold value, at this time, the actual current input into the vehicle-mounted battery is considered to be greater than the target current, the difference between the two is greater, the current adjustment mode is to reduce the current, and then the vehicle end reduces the required current according to the current adjustment mode.
For example, when the target current I 1 =100deg.A, actual current I 2 In the range (120A, 101A), I 2 And I 1 The current range interval in which the difference between them is located is (1 a,20 a). At this time, since the current regulation method corresponding to the first current range is to increase the current, the current regulation method is used to decrease the required current to be requested to the charging power supply until the difference value enters the second current range [ -2A, 1A)]。
By 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 condition of low charging speed or overload charging is effectively avoided.
In one possible design, when determining the current adjustment mode and adjusting the required current requested from the charging power source according to the current adjustment mode, the required current may be adjusted by adopting different current adjustment rates according to different differences, and the specific adjustment method includes:
the current regulation rate corresponding to the current regulation mode is determined, wherein the specific determination method of the current regulation rate can be as follows: determining a subinterval corresponding to the current difference value in the current interval range, determining a rate value corresponding to the subinterval, taking the rate value as a current regulation rate corresponding to a current regulation mode, and finally regulating the required current according to the current regulation rate.
In particular, when the current difference value belongs to the first current interval range, then the demand current requested to the charging source should be increased, and the specific rate of increase is different because the difference value is different in the corresponding sub-interval in the current interval range to which the current value belongs. If the current difference value belongs to a first subinterval in the first current interval range, indicating that the difference value between the actual current and the target current of the current input vehicle-mounted battery needs to be quickly reduced until the difference value enters a second interval current range; if the current difference value belongs to a second 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 is required to be slowly reduced until the difference value enters the second interval current range.
For example, the first current interval range is (-100A, -2A), the first subinterval is (-100A, -5A), and the second interval range is (-5A, -2A), the required current is increased at a current adjustment rate of 0.5A/s when the difference is in the first subinterval, and the required current is increased at a current adjustment rate of 0.1A/s when the difference is in the second subinterval.
When the current difference value belongs to the second current interval range, the corresponding current regulation rate is zero.
When the current difference value belongs to the third current interval range, then the demand current requested to the charging source should be reduced, the specific reduction rate being different because the difference value differs from the corresponding sub-interval in the current interval range to which the current value belongs. If the current difference value belongs to a third subinterval in a third current interval range, indicating that the difference value between the actual current and the target current of the current input vehicle-mounted battery needs to be slowly reduced until the difference value enters a second interval current range; if the current difference value belongs to a fourth subinterval in the third current interval range, the current difference value needs to be quickly reduced between the actual current and the target current of the current input vehicle-mounted battery until the current difference value enters the second interval current range.
For example, the first current interval range is (1A, 20 a), the first sub-interval is (1A, 3 a), the second interval range is (3 a,20 a), the required current is reduced at a current adjustment rate of 0.5A/s when the difference value is in the first sub-interval, and the required current is reduced at a current adjustment rate of 0.1A/s when the difference value is in the second sub-interval.
In the process, the required current is regulated according to the current regulation rate corresponding to the current regulation mode, so that the required current can be regulated according to the larger rate when the difference between the actual current and the target current of the input vehicle-mounted battery is larger, and the required current can be regulated according to the smaller rate when the difference is smaller, thereby enabling the actual current of the input vehicle-mounted battery to approach the target current, and effectively avoiding the situations of slow charging speed or overload charging.
Based on the charging current adjusting method, the current adjusting mode for adjusting the required current is determined according to the current interval range of the difference value between the actual current and the target current of the input vehicle-mounted battery, so that the required current is adjusted, frequent fluctuation of the actual current of the input vehicle-mounted battery can be effectively avoided, the actual current of the input 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 order to describe in detail a charging current adjusting method in the embodiments of the present application, a detailed description of the method provided in the present application is provided below through a specific application scenario. As shown in fig. 2, the fast charging current request process in the fast charging process of the electric automobile mainly includes 6 processes:
(1) Target required current calculation: after quick charge is started, calculating a target current I corresponding to the chargeable capacity of the battery according to the temperature of the current battery and the minimum/maximum voltage of the single body 1 The method comprises the steps of carrying out a first treatment on the surface of the Meanwhile, the vehicle-mounted accessory power is considered, and the required current for requesting the pile is obtained according to the battery chargeable capacity and the accessory power.
(2) Fast charge request current steady state: after the required current is calculated, a request is sent to the charging pile, and meanwhile, the actual current I entering the battery is obtained in real time 2 When I 1 And I 2 Within a preset range, e.g. I 1 ＝100A，I 2 I is reduced 1 When the current value is smaller than 1A and larger than-2A, the request is continuously sent to the charging pile according to the current value of the current demand, at the moment, the accessory at the vehicle end works normally, and the charging capacity of the battery is fully exerted.
(3) A fast charge request current slow increase state: when the actual current of the input battery is found to be smaller than the target current of the present battery, and the difference exceeds the slowly increasing threshold H Z But the difference is smaller than the rapid increase threshold K Z When the current demand is increased slowly, the actual current entering the battery returns to a steady state. For example, I 1 ＝100A，95A＜I 2 < 98A, the required current value is increased by a smaller step, for example, 0.1A/s, until I 1 Between 98 and 101A.
(4) Fast charge request current fast increase state: when the actual current entering the battery is found to be greater than or equal to the rapid increase threshold K Z The demand current is rapidly increased so that the actual current into the battery returns to a steady state. For example, I 1 ＝100A，I 2 < 95A, the required current is increased by larger steps, e.g. 0.5A/s, until I 2 Between 98 and 101A.
(5) State of slow decrease of fast charge current: when the actual current into the battery is found to be greater than the target current of the present battery and the difference exceeds the slow reduction threshold H J But less than the rapid decrease threshold K J When the current demand is reduced slowly, the actual current entering the battery returns to a steady state. For example, I 1 ＝100A，103A＞I 2 At > 101A, the required current is reduced in smaller steps, e.g., 0.1A/s, until I 2 Between 98 and 101A.
(6) Fast charge current fast decrease state: when the actual current into the battery is found to be greater than the target current of the present battery and the difference is greater than or equal to the rapid decrease threshold K J When the current demand is increased rapidly, the actual current flowing into the battery returns to a steady state. For example, I 1 ＝100A，I 2 At > 103A, the required current is reduced by a larger step, e.g., 0.5A/s, until I 2 Between 98 and 101A.
In the quick charge process, through calculation and adjustment of the states, the actual current entering the battery can be accurately charged according to the target current of the current battery, and the charging capability of the battery is fully exerted. Meanwhile, through setting the two states of fast adjustment and slow adjustment, the fluctuation of the required current and the actual current caused by the power fluctuation of the vehicle-mounted accessory, the output current error of the charging pile and other reasons can be effectively avoided. The charging capacity of the battery can be exerted, the charging safety of the battery is considered, and the charging overload condition in the charging and adjusting process is prevented.
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, where the device includes:
an obtaining module 31, configured to obtain a difference between an actual current currently input into the vehicle-mounted battery and a target current, where the target current represents that a current chargeable capability of the vehicle-mounted battery corresponds;
a judging module 32, configured to judge a current interval range to which the difference value belongs;
and the adjusting module 33 is 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 to the charging power supply.
Further, the adjusting module 33 is specifically configured to:
when the current regulation mode is a maintenance current mode, maintaining the required current;
when the current regulation mode is to increase current, increasing the required current;
and when the current regulation mode is to reduce the current, reducing the required current.
In one possible design, the adjustment module 33 includes:
the determining unit is used for determining a current regulation rate corresponding to the current regulation mode;
and the adjusting unit is used for adjusting the required current according to the current adjusting rate.
Further, the determining unit is specifically configured to:
determining a sub-interval corresponding to the difference value in the current interval range;
determining a rate value corresponding to the subinterval;
and taking the speed value as a current regulation speed corresponding to the current regulation mode.
In one possible design, the apparatus further comprises:
the calculation module is used for calculating the consumption 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 required current is requested to the charging power supply.
Based on the charging current adjusting device, the current adjusting mode for adjusting the required current is determined according to the current interval range of the difference value between the actual current and the target current of the input vehicle-mounted battery, so that the required current is adjusted, frequent fluctuation of the actual current of the input vehicle-mounted battery can be effectively avoided, the actual current of the input 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.
Based on the same inventive concept, the embodiment of the present application further provides an electronic device, where the electronic device may implement the function of the foregoing charging current adjustment method apparatus, and referring to fig. 4, the electronic device includes:
the embodiment of the present application does not limit the specific connection medium between the processor 41 and the memory 42, but the connection between the processor 41 and the memory 42 through the bus 40 is exemplified in fig. 4. The connection between the other components of bus 40 is shown in bold lines in fig. 4, and is merely illustrative and not limiting. The bus 40 may be divided into an address bus, a data bus, a control bus, etc., and is represented by only one thick line in fig. 4 for convenience of illustration, but does not represent only one bus or one type of bus. Alternatively, the processor 41 may be referred to as a controller, and the names are not limited.
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 can perform the charging current adjusting method described above by executing the instructions stored in the memory 42. The processor 41 may implement the functions of the respective modules in the apparatus shown in fig. 3.
The processor 41 is a control center of the apparatus, and various interfaces and lines can be used to connect various parts of the entire control device, and by executing or executing instructions stored in the memory 42 and invoking data stored in the memory 42, various functions of the apparatus and processing data, 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 and a modem processor, wherein the application processor primarily processes operating systems, user interfaces, application programs, and the like, and the modem processor primarily processes 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, and 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 device, discrete hardware components, which may implement or perform the methods, steps and logic blocks disclosed in the embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the charging current adjustment method disclosed in connection with the embodiments of the present application may be directly embodied in a hardware processor for execution, or may be executed by a combination of hardware and software modules in the processor.
The memory 42 is used as a non-volatile computer readable storage medium for storing 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, flash Memory, hard disk, multimedia card, card Memory, random access Memory (Random Access Memory, RAM), static random access Memory (Static Random Access Memory, SRAM), programmable Read-Only Memory (Programmable Read Only Memory, PROM), read-Only Memory (ROM), charged erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), magnetic Memory, magnetic disk, optical disk, and the like. 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 to such. The memory 42 in the present embodiment may also be circuitry or any other device capable of implementing a memory function for storing program instructions and/or data.
By programming the processor 41, the code corresponding to the charge current adjustment method described in the foregoing embodiment can be solidified into a chip, so that the chip can execute the steps of the charge current adjustment method of the embodiment shown in fig. 1 at the time of operation. How to design and program the processor 41 is a technique well known to those skilled in the art, and will not be described in detail herein.
Based on the same inventive concept, the embodiments of the present application also provide a storage medium storing computer instructions that, when run on a computer, cause the computer to perform the charging current adjustment method as discussed above.
In some possible embodiments, 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 the control apparatus to carry out the steps of the charging current adjustment method according to the various exemplary embodiments of the present application as described herein above, when the program product is run on a device.
It will be appreciated by those skilled in the art that 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 modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (6)
1. A method of charging current regulation, the method comprising:
obtaining a difference value between the actual current and the target current of the currently input vehicle-mounted battery and a consumption current corresponding to the vehicle-mounted accessory;
judging the current interval range of the difference value;
determining a current regulation mode corresponding to the current interval range, determining a subinterval corresponding to the difference value in the current interval range, determining a speed value corresponding to the subinterval, taking the speed value as a current regulation speed corresponding to the current regulation mode, and regulating a required current according to the current regulation speed, wherein the required current represents a current requested to a charging power supply, and the required current is obtained by summing the target current and the consumption current.
2. The method of claim 1, wherein said adjusting the demand current in accordance with said current adjustment comprises:
when the current regulation mode is a maintenance current, maintaining the required current;
when the current regulation mode is to increase current, increasing the required current;
and when the current regulation mode is to reduce the current, reducing the required current.
3. A charging current regulating device, the device comprising:
the acquisition module is used for acquiring the difference value between the actual current and the target current of the currently input vehicle-mounted battery and the consumption current corresponding to the vehicle-mounted accessory;
the judging module is used for judging the current interval range of the difference value;
the adjusting module is used for determining a current adjusting mode corresponding to the current interval range, determining a subinterval corresponding to the difference value in the current interval range, determining a speed value corresponding to the subinterval, taking the speed value as a current adjusting speed corresponding to the current adjusting mode, and adjusting a required current according to the current adjusting speed, wherein the required current represents a current requested to a charging power supply, and the required current is obtained by summing the target current and the consumption current.
4. A device according to claim 3, wherein the adjustment module is specifically configured to:
when the current regulation mode is a maintenance current, maintaining the required current;
when the current regulation mode is to increase current, increasing the required current;
and when the current regulation mode is to reduce the current, reducing the required current.
5. An electronic device, comprising:
a memory for storing a computer program;
a processor for carrying out the method steps of any one of claims 1-2 when executing a computer program stored on said memory.
6. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein a computer program which, when executed by a processor, implements the method steps of any of claims 1-2.
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