CN110829543B - Charging current dynamic adjustment method and device and new energy automobile - Google Patents

Charging current dynamic adjustment method and device and new energy automobile Download PDF

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Publication number
CN110829543B
CN110829543B CN201911174750.XA CN201911174750A CN110829543B CN 110829543 B CN110829543 B CN 110829543B CN 201911174750 A CN201911174750 A CN 201911174750A CN 110829543 B CN110829543 B CN 110829543B
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value
current
charging current
charging
preset
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CN110829543A (en
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陈斌
徐强
严丽
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Soundon New Energy Technology Co Ltd
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Soundon New Energy Technology 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
    • 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
    • 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
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • 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
    • Y02T90/12—Electric charging stations
    • 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)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a charging current dynamic adjustment method and device and a new energy automobile, wherein the charging current dynamic adjustment method comprises the following steps: after entering a charging state, acquiring a charging current demand value as a current request value by matching the temperature and the voltage of the battery with a pre-established charging demand table, and controlling the charging current of a charger according to the current request value; the current charging current value of the battery is obtained, the current request value is adjusted according to the current charging current value, the charging current demand value and a preset time rule, and the charging current of the charger is controlled in a closed loop mode according to the adjusted current request value. According to the dynamic adjustment method for the charging current, when the new energy automobile is charged, even if other functional components have power utilization requirements, the charging current charged into the battery can be kept to be a required value, the charging effect is not influenced, the service life of the battery is prolonged, and meanwhile, the other functional components of the new energy automobile can work normally.

Description

Charging current dynamic adjustment method and device and new energy automobile
Technical Field
The invention relates to the field of new energy automobiles, in particular to a dynamic charging current adjusting method and device, a new energy automobile and a computer storage medium.
Background
In the conventional new energy vehicle, some functional components are generally used during charging, and for example, in the case of severe cold or severe heat, the charging process can be assisted by the liquid cooling device, and the battery is heated in the case of severe cold and cooled in the case of severe heat.
However, when these functional components are used in the charging process, the power consumption of the charger is increased, which results in that the charging current of the battery is partially shunted, and the charging process of the battery cannot be performed according to the original charging current demand, thereby affecting the charging effect and the service life of the battery.
Disclosure of Invention
In view of the above problems, the present invention provides a charging current dynamic adjustment method, apparatus, new energy vehicle and computer storage medium to ensure that the charging current charged into the battery is maintained at a required value, and at the same time ensure that other functional components of the new energy vehicle can work normally.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of dynamically adjusting a charge current, comprising:
after entering a charging state, acquiring a charging current demand value as a current request value by matching the temperature and the voltage of the battery with a pre-established charging demand table, and controlling the charging current of a charger according to the current request value;
and acquiring the current charging current value of the battery, adjusting the current request value according to the current charging current value, the charging current demand value and a preset time rule, and controlling the charging current of the charger in a closed loop according to the adjusted current request value.
Preferably, in the dynamic adjustment method for charging current, the obtaining a current charging current value of the battery, adjusting a current request value according to the current charging current value, the charging current demand value and a preset time rule, and controlling the charging current of the charger in a closed loop according to the adjusted current request value includes:
judging whether the difference value of the current charging current value minus the current demand value is greater than or equal to a first preset value within a first preset time;
if the difference value of the current charging current value minus the current demand value is larger than or equal to the first preset value, the current charging current value minus the first preset value is used as a current request value;
if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than the first preset value, judging whether the difference value obtained by subtracting the current demand value from the current charging current value is smaller than or equal to a second preset value within second preset time;
if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than or equal to a second preset value, adding the second preset value by using the current charging current value as a current request value;
and if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than a first preset value and larger than a second preset value, acquiring a new charging current demand value as a current demand value by using the current temperature and voltage of the battery and the pre-established charging demand table.
Preferably, in the dynamic adjustment method for charging current, the obtaining a current charging current value of the battery, adjusting a current request value according to the current charging current value, the charging current demand value and a preset time rule, and controlling the charging current of the charger in a closed loop according to the adjusted current request value further includes:
after subtracting the first preset value from the current charging current value to be the current request value or adding the second preset value from the current charging current value to be the current request value, whether the difference value of subtracting the current request value from the current charging current value is larger than or equal to the first preset value within the first preset time is judged again;
if the difference value obtained by subtracting the current demand value from the current charging current value is larger than or equal to the first preset value, returning to the step of subtracting the first preset value from the current charging current value as a current request value;
if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than the first preset value, judging whether the difference value obtained by subtracting the current demand value from the current charging current value is smaller than or equal to a second preset value within second preset time;
if the difference value obtained by subtracting the current demand value from the current charging current value is less than or equal to a fourth preset value, returning to the current charging current value and adding the second preset value as a current demand value;
and if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than the first preset value and larger than the second preset value, keeping the original current demand value.
Preferably, in the method for dynamically adjusting charging current, before returning to using the current charging current value minus the fourth preset value as the current request value, the method further includes:
judging whether the charger reaches the maximum output power;
when the charger reaches the maximum output power, the original current request value is kept;
and when the charger does not reach the maximum output power, returning to the current charging current value minus the fourth preset value as a current request value.
Preferably, in the dynamic adjustment method of charging current, the first preset time is shorter than the second preset time.
The present invention also provides a charging current dynamic adjustment apparatus, including:
the current demand calculation module is used for matching the temperature and the voltage of the battery with a pre-established charging demand table after entering a charging state, acquiring a charging current demand value as a current request value, and controlling the charging current of the charger according to the current request value;
and the current closed-loop control module is used for acquiring the current charging current value of the battery, adjusting the current request value according to the current charging current value, the charging current demand value and a preset time rule, and controlling the charging current of the charger in a closed-loop mode according to the adjusted current request value.
Preferably, in the dynamic charging current adjustment apparatus, the current closed-loop control module includes:
the first judgment unit is used for judging whether the difference value of the current charging current value minus the current demand value is greater than or equal to a first preset value within a first preset time;
the first adjusting unit is used for subtracting the first preset value from the current charging current value to serve as a current request value if the difference value obtained by subtracting the current request value from the current charging current value is larger than or equal to the first preset value;
a second judging unit, configured to, if it is determined that the difference between the current charging current value and the current demand value is smaller than the first preset value, judge whether the difference between the current charging current value and the current demand value is smaller than or equal to a second preset value within a second preset time;
the second adjusting unit is used for adding the second preset value to be the current request value by using the current charging current value if the difference value obtained by subtracting the current request value from the current charging current value is smaller than or equal to the second preset value;
and the request value acquisition unit is used for acquiring a new charging current demand value as the current request value by utilizing the current temperature and voltage of the battery and the pre-established charging request table if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than a first preset value and larger than a second preset value.
Preferably, in the dynamic charging current adjusting device, the first preset time is shorter than the second preset time.
The invention also provides a new energy automobile which comprises a memory and a processor, wherein the memory is used for storing the computer program, and the processor runs the computer program to enable the new energy automobile to execute the dynamic charging current adjusting method.
The invention also provides a computer storage medium, which stores a computer program that, when executed by a processor, implements the charging current dynamic adjustment method.
The invention provides a dynamic adjustment method for a charging current, which comprises the following steps: after entering a charging state, acquiring a charging current demand value as a current request value by matching the temperature and the voltage of the battery with a pre-established charging demand table, and controlling the charging current of a charger according to the current request value; and acquiring the current charging current value of the battery, adjusting the current request value according to the current charging current value, the charging current demand value and a preset time rule, and controlling the charging current of the charger in a closed loop according to the adjusted current request value. The dynamic adjustment method of the charging current can dynamically adjust the current request value according to the current charging current value and the charging current demand value of the battery, thereby achieving the purpose of controlling the charging current of the charger in a closed loop mode.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
Fig. 1 is a flowchart of a dynamic adjustment method of a charging current according to embodiment 1 of the present invention;
fig. 2 is a flowchart of a charging current of a closed-loop control charger according to embodiment 2 of the present invention;
fig. 3 is a flowchart of a charging current of another closed-loop control charger according to embodiment 2 of the present invention;
fig. 4 is a flowchart of adjusting a current request value according to embodiment 3 of the present invention;
fig. 5 is a flowchart of a charging current of a third closed-loop control charger according to embodiment 3 of the present invention;
fig. 6 is a schematic structural diagram of a dynamic charging current adjustment apparatus according to embodiment 4 of the present invention;
fig. 7 is a schematic structural diagram of a current closed-loop control module of a dynamic charging current adjustment apparatus according to embodiment 4 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
Fig. 1 is a flowchart of a dynamic adjustment method of a charging current according to embodiment 1 of the present invention, where the method includes the following steps:
step S11: after entering a charging state, the temperature and the voltage of the battery are matched with a pre-established charging demand table, a charging current demand value is obtained as a current request value, and the charging current of the charger is controlled according to the current request value.
In the embodiment of the invention, after the new energy automobile enters the charging state, an initial current request value is obtained through a battery management system of the automobile and is reported to the charger through a control bus of the new energy automobile, so that the charger inputs corresponding charging current for the battery according to the current request value. The new energy automobile is characterized in that a vehicle-mounted charging demand matrix table is stored in advance, and the vehicle-mounted charging demand matrix table stores voltage and a charging current demand value corresponding to the temperature of a battery, namely the current of the battery is kept at the charging current demand value when the battery is charged, so that the damage to the battery can be avoided, and the service life of the battery can be prolonged.
Wherein, as shown in the following table, the following is one of the vehicle charging demand matrix tables:
Figure BDA0002289681050000071
in the table, Phase is a charging Phase, and data in the table only represents a current demand value, a voltage value and a corresponding temperature of one new energy automobile battery, and batteries of different types, models and different new energy automobiles are different, so that the data in the table are not limited. The charging voltage required value of the battery is obtained after table lookup and is transmitted to the charger, and other functional components in the new energy automobile are connected in parallel, so that the influence of the other functional components on the charging voltage is not large when the new energy automobile works, and therefore the charging current is mainly considered to be adjusted in the application.
In the embodiment of the invention, the temperature of the battery of the new energy automobile can be obtained by using the temperature sensors, for example, the battery is provided with a plurality of temperature sensors, the temperature of each part of the battery is obtained by the temperature sensors and then is transmitted to the automobile controller through the control bus, and the average value is the final temperature of the battery. The battery management system is provided with a vehicle-mounted charging demand matrix table matching algorithm or an application program, for example, after the temperature and the voltage of the battery are obtained, the temperature and the voltage of the battery can be input into the vehicle-mounted charging demand matrix table matching application program, so that a corresponding charging current demand value is obtained. The temperature and the voltage of the battery may be obtained from a state of charge (SOC) of the new energy vehicle, which is not limited herein.
In the embodiment of the invention, after the charging current demand value is obtained, the charging current demand value is used as an initial current request value and is transmitted to the charger through the control bus, and the charger starts to input the charging current according to the initial current request value. The charger is a power conversion device arranged in the new energy automobile, and can convert household electricity into electric power required by automobile charging.
Step S12: and acquiring the current charging current value of the battery, adjusting the current request value according to the current charging current value, the charging current demand value and a preset time rule, and controlling the charging current of the charger in a closed loop according to the adjusted current request value.
In the embodiment of the invention, in order to adjust the charging current of the charger, a new charging request value is required to be continuously reported to the charger, and the new charging request value is adjusted through the current charging current value, the charging current request value and a preset time rule. The current charging current value of the battery is continuously acquired to adjust the charging request value, and the adjusted charging request value influences the current charging current value, so that the adjustment process is a closed-loop control process, the adjustment process can be completed by utilizing a closed-loop control algorithm or an application program, for example, a closed-loop control application program can be arranged in a battery management system, the closed-loop control application program can acquire the charging current value of the battery in real time, and adjust the current request value according to the charging current demand value and a preset time rule to obtain a new current request value which is transmitted to the charger, so that the effect of closed-loop control of the charging current of the charger is achieved.
In the embodiment of the invention, even if other functional parts of the automobile have electricity demand during charging, the shunt electricity of the other functional parts can be accurately complemented by controlling the charging current input by the charger in a closed loop, so that the battery can obtain correct charging current, the battery is prevented from being damaged, the service life of the battery is prolonged, and other functional parts of the new energy automobile can also normally work. Wherein, this functional unit can heat the battery including the liquid cooling part of battery through this liquid cooling part, guarantees that the battery can normally charge and work in cold areas to and can cool off the battery through the liquid cooling part, guarantee that the battery can normally charge and work in hot areas.
Example 2
Fig. 2 is a flowchart of a charging current of a closed-loop control charger according to embodiment 2 of the present invention, including the following steps:
step S21: and judging whether the difference value of the current charging current value minus the current demand value is greater than or equal to a first preset value within a first preset time.
Step S22: and if the difference value of the current charging current value minus the current demand value is larger than or equal to the first preset value, using the current charging current value minus the first preset value as the current demand value.
Step S23: and if the difference value of the current charging current value minus the current demand value is smaller than the first preset value, judging whether the difference value of the current charging current value minus the current demand value is smaller than or equal to a second preset value within a second preset time.
Step S24: and if the difference value obtained by subtracting the current demand value from the current charging current value is less than or equal to a second preset value, adding the second preset value to the current charging current value to obtain a current request value.
Step S25: and if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than a first preset value and larger than a second preset value, acquiring a new charging current demand value as a current demand value by using the current temperature and voltage of the battery and the pre-established charging demand table.
In the embodiment of the present invention, when it is determined that the battery is in the abnormal charging state according to the current charging current value and the current demand value, a new charging current demand value is obtained as the current request value by using the current temperature and voltage of the battery and the pre-established charging demand table. After the charger starts inputting the corresponding charging current according to the initial current request value, it may be determined whether the current battery is in a normal charging state, specifically, the current temperature, voltage and current charging current value of the battery may be used for determining, for example, a charging state determination application program may be provided in the battery management system, the charging state determination application program may determine whether the battery is in a normal charging state according to the current temperature, voltage and current charging current value of the battery, and when the battery is in an abnormal charging state, the current temperature, voltage and a pre-established charging demand table are used again to obtain a new charging current request value as the current request value, and the new current request value is sent to the charger.
In the embodiment of the present invention, it may be determined whether the battery is in an abnormal charging state by using a current charging current value of the battery, specifically, it may be determined whether a difference between the current charging current value and the current demand value within a first preset time is smaller than a first preset value, and when the difference is smaller than the first preset value, it is determined whether a difference between the current charging current value and the current demand value within a second preset time is greater than a second preset value, and when the difference is smaller than the first preset value and greater than the second preset value, it is determined that the battery is in the abnormal charging state. The first preset time may be 2s, the first preset time may be 2A, the second preset time may be 5s, and the second preset time may be-3A, which is not limited herein.
Fig. 3 is a flowchart of another charging current of a closed-loop control charger according to embodiment 2 of the present invention, which further includes the following steps:
step S26: and after subtracting the first preset value from the current charging current value to obtain a current request value or adding the second preset value from the current charging current value to obtain a current request value, whether the difference value of subtracting the current request value from the current charging current value is greater than or equal to the first preset value within the first preset time is judged again.
Step S27: and if the difference value obtained by subtracting the current demand value from the current charging current value is greater than or equal to the first preset value, returning to the step of subtracting the first preset value from the current charging current value as the current demand value.
Step S28: and if the difference value of the current charging current value minus the current demand value is smaller than the first preset value, judging whether the difference value of the current charging current value minus the current demand value is smaller than or equal to a second preset value within a second preset time.
Step S29: and if the difference value obtained by subtracting the current demand value from the current charging current value is less than or equal to a fourth preset value, returning to the current charging current value and adding the second preset value as the current demand value.
Step S30: and if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than the first preset value and larger than the second preset value, keeping the original current demand value.
In the embodiment of the invention, the main principle of the closed-loop control is to dynamically increase or decrease the current request value according to the current charging current value of the battery, so that the current charging current value is close to the charging current request value and is kept stable, and damage caused by instability of the charging current during charging of the battery is reduced.
As shown in fig. 4, before returning to the step of adding the second preset value to the current charging current value as the current request value, the method further includes:
step S41: and judging whether the charger reaches the maximum output power.
Step S42: and when the charger reaches the maximum output power, keeping the original current request value.
Step S43: and when the charger does not reach the maximum output power, returning to the current charging current value minus the second preset value as a current request value.
In an embodiment of the invention, the first preset time is shorter than the second preset time. For example, the first preset time may be 2s, the first preset time may be 2A, the second preset time may be 5s, and the second preset time may be-3A, and in combination with the above embodiment, the first preset time may be 2s, the first preset time may be 2A, the second preset time may be 5s, and the second preset time may be-3A, a flowchart of a dynamic adjustment method of a charging current as shown in fig. 5 may be obtained, which is not limited herein.
Example 3
Fig. 6 is a schematic structural diagram of a dynamic charging current adjustment apparatus according to embodiment 4 of the present invention.
The charging current dynamic adjustment apparatus 600 includes:
the current demand calculation module 610 is configured to, after entering a charging state, match a charging demand table established in advance with the temperature and voltage of the battery to obtain a charging current demand value as a current request value, and control the charging current of the charger according to the current request value;
and a current closed-loop control module 620, configured to obtain a current charging current value of the battery, adjust the current request value according to the current charging current value, the charging current demand value, and a preset time rule, and control the charging current of the charger in a closed-loop manner according to the adjusted current request value.
As shown in fig. 7, the current closed-loop control module 620 includes:
a first determining unit 621, configured to determine whether a difference between the current charging current value and the current demand value is greater than or equal to a first preset value within a first preset time;
a first adjusting unit 622, configured to subtract the first preset value from the current charging current value to obtain a current request value if it is determined that the difference between the current charging current value and the current request value is greater than or equal to the first preset value;
a second determining unit 623, configured to determine whether a difference between the current charging current value and the current demand value is smaller than or equal to a second preset value within a second preset time if it is determined that the difference between the current charging current value and the current demand value is smaller than the first preset value;
a second adjusting unit 624, configured to add the second preset value to the current request value by using the current charging current value if it is determined that the difference between the current charging current value and the current request value is smaller than or equal to the second preset value;
a request value obtaining unit 625, configured to, if it is determined that a difference between the current charging current value and the current request value is smaller than a first preset value and larger than a second preset value, obtain a new charging current request value as the current request value by using the current temperature and voltage of the battery and the pre-established charging request table.
Wherein the first preset time is less than the second preset time.
In the embodiment of the present invention, for more detailed functional description of each module and each unit, reference may be made to contents of corresponding parts in the foregoing embodiment, which are not described herein again.
In addition, the invention also provides a new energy automobile, which comprises a memory and a processor, wherein the memory can be used for storing a computer program, and the processor enables the new energy automobile to execute the functions of each module in the method or the charging current dynamic adjustment device by running the computer program.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phone book, etc.) created according to the use of the new energy vehicle, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The embodiment also provides a computer storage medium for storing the computer program used in the new energy automobile.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in each embodiment of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part of the technical solution that contributes to the prior art in essence can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A method for dynamically adjusting a charging current, comprising:
after entering a charging state, acquiring a charging current demand value as a current request value by matching the temperature and the voltage of the battery with a pre-established charging demand table, and controlling the charging current of a charger according to the current request value;
acquiring the current charging current value of the battery, adjusting the current request value according to the current charging current value, the charging current demand value and a preset time rule, and controlling the charging current of the charger in a closed loop according to the adjusted current request value;
the step of obtaining the current charging current value of the battery, adjusting the current request value according to the current charging current value, the charging current demand value and a preset time rule, and controlling the charging current of the charger in a closed loop according to the adjusted current request value comprises the following steps:
judging whether the difference value of the current charging current value minus the current demand value is greater than or equal to a first preset value within a first preset time;
if the difference value of the current charging current value minus the current demand value is larger than or equal to the first preset value, the current charging current value minus the first preset value is used as a current request value;
if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than the first preset value, judging whether the difference value obtained by subtracting the current demand value from the current charging current value is smaller than or equal to a second preset value within second preset time;
if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than or equal to a second preset value, adding the second preset value by using the current charging current value as a current request value;
and if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than a first preset value and larger than a second preset value, acquiring a new charging current demand value as a current request value by using the current temperature and voltage of the battery and the pre-established charging demand table.
2. The dynamic charging current adjustment method according to claim 1, wherein the obtaining the current charging current value of the battery, adjusting the current request value according to the current charging current value, the charging current demand value and a preset time rule, and controlling the charging current of the charger in a closed loop according to the adjusted current request value further comprises:
after subtracting the first preset value from the current charging current value to be the current request value or adding the second preset value from the current charging current value to be the current request value, whether the difference value of subtracting the current request value from the current charging current value is larger than or equal to the first preset value within the first preset time is judged again;
if the difference value obtained by subtracting the current demand value from the current charging current value is larger than or equal to the first preset value, returning to the step of subtracting the first preset value from the current charging current value as a current request value;
if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than the first preset value, judging whether the difference value obtained by subtracting the current demand value from the current charging current value is smaller than or equal to a second preset value within second preset time;
if the difference value obtained by subtracting the current demand value from the current charging current value is less than or equal to a fourth preset value, returning to the current charging current value and adding the second preset value as a current demand value;
and if the difference value obtained by subtracting the current demand value from the current charging current value is smaller than the first preset value and larger than the second preset value, keeping the original current demand value.
3. The dynamic charging current adjustment method according to claim 2, further comprising, before returning to use the current charging current value minus the fourth preset value as the current request value:
judging whether the charger reaches the maximum output power;
when the charger reaches the maximum output power, the original current request value is kept;
and when the charger does not reach the maximum output power, returning to the current charging current value minus the fourth preset value as a current request value.
4. The method for dynamically adjusting a charging current according to claim 1, wherein the first predetermined time is less than the second predetermined time.
5. A charging current dynamic adjustment apparatus, comprising:
the current demand calculation module is used for matching the temperature and the voltage of the battery with a pre-established charging demand table after entering a charging state, acquiring a charging current demand value as a current request value, and controlling the charging current of the charger according to the current request value;
the current closed-loop control module is used for acquiring the current charging current value of the battery, adjusting the current request value according to the current charging current value, the charging current demand value and a preset time rule, and controlling the charging current of the charger in a closed-loop mode according to the adjusted current request value;
the current closed-loop control module comprises:
the first judgment unit is used for judging whether the difference value of the current charging current value minus the current demand value is greater than or equal to a first preset value within a first preset time;
the first adjusting unit is used for subtracting the first preset value from the current charging current value to serve as a current request value if the difference value obtained by subtracting the current request value from the current charging current value is larger than or equal to the first preset value;
a second judging unit, configured to, if it is determined that the difference between the current charging current value and the current demand value is smaller than the first preset value, judge whether the difference between the current charging current value and the current demand value is smaller than or equal to a second preset value within a second preset time;
the second adjusting unit is used for adding the second preset value to be the current request value by using the current charging current value if the difference value obtained by subtracting the current request value from the current charging current value is smaller than or equal to the second preset value;
and the request value acquisition unit is used for acquiring a new charging current request value as the current request value by utilizing the current temperature and voltage of the battery and the pre-established charging request table if the difference value obtained by subtracting the current request value from the current charging current value is smaller than a first preset value and larger than a second preset value.
6. The dynamic charging current adjustment device of claim 5, wherein the first predetermined time is less than the second predetermined time.
7. A new energy automobile, characterized by comprising a memory for storing a computer program and a processor for executing the computer program to cause the new energy automobile to execute the charging current dynamic adjustment method according to any one of claims 1 to 4.
8. A computer storage medium, characterized in that it stores a computer program which, when executed by a processor, implements the charging current dynamic adjustment method of any one of claims 1 to 4.
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