CN115610278B - Battery charge control method and vehicle - Google Patents
Battery charge control method and vehicle Download PDFInfo
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- CN115610278B CN115610278B CN202211385991.0A CN202211385991A CN115610278B CN 115610278 B CN115610278 B CN 115610278B CN 202211385991 A CN202211385991 A CN 202211385991A CN 115610278 B CN115610278 B CN 115610278B
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- 238000004891 communication Methods 0.000 claims description 27
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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
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/44—Control modes by parameter estimation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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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)
Abstract
The invention discloses a battery charging control method and a vehicle. Wherein the method comprises the following steps: identifying a battery and acquiring state information of the battery at the current moment, wherein the state information is used for representing the state of the battery when the battery starts to charge; determining a charging start condition of the battery based on the state information; determining a target current requested by the battery to the charging pile based on the charging initial working condition and the state information; the battery is charged at a future time based on the target current. The invention solves the technical problem of poor protection effect on battery performance.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a battery charging control method and a vehicle.
Background
In the related art, the battery of the vehicle can be charged only by the recharging, slow recharging and fast recharging methods, but it is difficult to ensure the best performance of the battery because the charging requirements of the battery are different under different charging start conditions. Therefore, there is still a technical problem in that the protective effect on the battery performance is poor.
Aiming at the technical problem of poor protection effect on battery performance in the related technology, no effective scheme is proposed at present.
Disclosure of Invention
The embodiment of the invention provides a battery charging control method and a vehicle, which are used for at least solving the technical problem of poor protection effect on battery performance.
According to an aspect of an embodiment of the present invention, there is provided a method of controlling charge of a battery. The method may include: identifying a battery and acquiring state information of the battery at the current moment, wherein the state information is used for representing the state of the battery when the battery starts to charge; determining a charging start condition of the battery based on the state information; determining a target current requested by the battery to the energy storage system based on the charging initial working condition and the state information; the battery is charged at a future time based on the target current.
Optionally, determining the charging start condition of the battery based on the state information includes: and determining the charging starting working condition of the battery based on the charging times and/or charging time in the state information, the current residual quantity and the charging mark count.
Optionally, determining the charging start condition of the battery based on the charging times and/or charging time in the state information, the current remaining power and the charging flag count includes: determining that the battery is in a first charging starting condition in response to the charging times being zero; determining that the battery is in a second charging starting condition in response to the charging times being greater than zero and the time interval exceeding a time threshold, wherein the time interval is a time period between the current time of the battery and the last charging time; determining that the battery is in a third charging starting condition in response to the time interval not exceeding the time threshold and the difference between the current remaining capacity and the discharging cut-off capacity threshold being less than or equal to the capacity threshold; determining that the battery is in a fourth charging starting condition in response to the difference between the current remaining capacity and the discharging cut-off capacity threshold being greater than the capacity threshold; and in response to the charge flag count reaching the count threshold, determining that the battery is in a fifth charge start condition.
Optionally, determining the target current of the battery to the energy storage system based on the charging start condition and the state information includes: and determining a target current based on a maximum value of the cell voltage of the battery and a first coefficient in response to the charging start condition being a first charging start condition, wherein the first coefficient is used for representing the battery characteristic of the battery and the influence degree of the battery temperature of the battery on the target current.
Optionally, determining the target current of the battery to the energy storage system based on the charging start condition and the state information includes: responding to the charging starting working condition as a second charging starting working condition, wherein the current residual electric quantity is smaller than or equal to a set limit value, and determining a target current based on the maximum value of the cell voltage of the battery and a second coefficient; and determining the target current under the second charging starting condition based on the maximum value of the monomer voltage and the third coefficient in response to the current residual electric quantity being larger than the set limit value.
Optionally, determining the target current of the battery to the energy storage system based on the charging start condition and the state information includes: responding to the charging initial condition as a third charging initial condition, and charging the battery based on a preset target current; and determining the target current based on the maximum value of the cell voltage in response to the average value of the cell voltage of the battery reaching a voltage threshold or the charging start condition being a fourth charging start condition.
Optionally, if the count of the charging mark is smaller than or equal to the count threshold, obtaining the charging power of the battery; in response to the charging power being greater than the power threshold, incrementing a charging flag count; and responding to the charging starting condition as a fifth charging starting condition, and activating a maintenance mark of the battery, wherein the maintenance mark is used for starting a battery maintenance mode of the battery.
Optionally, setting a target current upper limit for an interval of the current residual capacity based on the state information; if the current exceeds the target current upper limit, determining the target current upper limit as the target current; and in response to the maximum value of the cell voltage reaching the full-charge voltage, charging the battery based on a preset target current.
Optionally, during charging of the battery, determining that the battery is in a communication abnormal state in response to the battery or the energy storage system being in an abnormal state; if the current residual electric quantity is smaller than the timeout protection threshold value and the battery is successfully reconnected after timeout, determining that a battery timeout protection activation flag is unchanged, and determining a target current based on the maximum value of the single voltage of the battery, wherein the timeout protection activation flag is used for determining whether to start a timeout protection mode for the battery; if the current residual electric quantity is greater than or equal to the overtime protection threshold and the battery is successfully charged overtime, setting an overtime protection activation flag to be one, and starting an overtime protection mode for the battery.
According to another aspect of the embodiment of the present invention, there is also provided a charge control device for a battery, including: the battery charging device comprises an acquisition unit, a charging unit and a charging unit, wherein the acquisition unit is used for identifying a battery and acquiring state information of the battery at the current moment, wherein the state information is used for guaranteeing the state of the battery when charging is started; the first determining unit is used for determining the charging starting working condition of the battery based on the state information; the second determining unit is used for determining a target current requested by the battery to the energy storage system based on the charging starting working condition and the state information; and a charging unit for charging the battery at a future time based on the target current.
According to another aspect of an embodiment of the present invention, there is also provided a computer-readable storage medium. The computer readable storage medium includes a stored program, wherein the program when run controls a device in which the computer readable storage medium is located to execute the battery charging control method according to the embodiment of the present invention.
According to another aspect of an embodiment of the present invention, there is also provided a processor. The processor is used for running a program, wherein the program executes the battery charging control method according to the embodiment of the invention when running.
According to another aspect of an embodiment of the present invention, there is also provided a vehicle. The vehicle is used for executing the battery charging control method according to the embodiment of the invention.
In the embodiment of the invention, the battery is identified, and the state information of the battery at the current moment is obtained, wherein the state information is used for representing the state of the battery when the battery starts to charge; determining a charging start condition of the battery based on the state information; determining a target current requested by the battery to the energy storage system based on the charging initial working condition and the state information; the battery is charged at a future time based on the target current. That is, when the battery starts to be charged, the embodiment of the invention can acquire the state information stored in the battery, can determine the current charging starting working condition of the battery by processing the state information, can obtain the target current requested by the battery to the energy storage system by carrying out the related calculation on the state information under the charging starting working condition of the battery, and can charge the battery by transmitting the target current from the energy storage system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
Fig. 1 is a flowchart of a method of controlling charge of a battery according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a charge control system according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for identifying a charging start condition according to an embodiment of the present invention;
fig. 4 is a schematic view of a charge control device of a battery according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the present invention, there is provided an embodiment of a battery charge control method, it being noted that the steps shown in the flowcharts of the drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that herein.
Fig. 1 is a flowchart of a method of controlling charge of a battery according to an embodiment of the present invention, as shown in fig. 1, the method may include the steps of:
Step S102, the battery is identified, and state information of the battery at the current moment is obtained, wherein the state information is used for representing the state of the battery when charging is started.
In the technical scheme provided in the step S102, when the battery starts to charge, the battery is identified, and state information stored in the battery at the current moment can be obtained, where the state information can be used to characterize the state of the battery when the battery starts to charge, and may include information such as the battery temperature, the total voltage, the current remaining capacity, the charging date and time, the charging times, and the single voltage. The battery may contain a plurality of cells inside. It should be noted that the status information herein is merely illustrative, and is not particularly limited.
For example, after each charging, the battery may store the charging date and time, the charging frequency, etc. of each charging, and when the next time the battery starts to charge, the battery may be identified by the battery status information acquisition module disposed on the battery or the energy storage system to obtain the status information of the battery, for example, the battery temperature is 25 ℃, the current remaining power is 10%, the charging frequency is 5 times, and the last charging date and time is 2022-10-10 11:30-20:00.
Step S104, based on the state information, determining the charging start condition of the battery.
In the technical scheme provided in the step S104, the state information may be processed to determine the charging start condition of the battery when charging is started, where the charging start condition may include conditions such as first charging of the battery, long-time uncharged battery, overdischarge (too low electric quantity) of the battery, normal condition of the battery, abnormal communication of the battery, and maintenance of the battery. The charge start condition is merely illustrative and not particularly limited.
In the embodiment of the invention, a plurality of charging starting conditions, such as five charging starting conditions, can be determined by processing the state information, so that the corresponding charging requirement under each charging starting condition can be determined, and the technical problem that the battery performance cannot be protected based on different charging starting conditions in the prior art is solved. It should be noted that the content and the number of the charging start conditions are only illustrative.
For example, the battery is identified by the battery state information acquisition module, so that the number of times of charging the battery at the current moment is 0, the state information is transmitted to the charging start condition identification module, and the module can determine that the charging start condition of the battery is the first charging of the battery based on the currently received state information. For example only, the process and method of determining the charging start condition of the battery based on the state information are within the scope of the embodiments of the present invention.
Step S106, determining a target current requested by the battery to the energy storage system based on the charging start working condition and the state information.
In the technical scheme provided in the step S106, under each charging start condition, the target current requested by the battery to the energy storage system can be determined based on the current state information of the battery, wherein the energy storage system can be a charging pile, a power exchange station or a charger, and the like, and the invention is not limited in particular.
Optionally, based on the charging start condition and the state information, the determining target current may pass through a charging demand calculating module, which may receive the state information and the charging start condition obtained by the battery state information collecting module and the charging start condition identifying module, calculate and determine the obtained state information and the charging start condition, and determine the target current of the battery.
For example, the initial charging condition identifying module identifies that the initial charging condition is a normal battery condition, the battery state information collecting module obtains the current single voltage of the battery, and the current single voltage of the battery are transmitted to the charging demand calculating module, the module can determine the current obtained by looking up the table as the target current required by the battery to the energy storage system through inquiring the current corresponding to the current single voltage in the voltage ammeter, and it is to be noted that the process and the step of determining the target current of the battery based on the state information are all within the protection scope of the embodiment of the present invention, which is only illustrative and not limited herein.
In the embodiment of the invention, the working conditions when the battery starts to be charged are considered to be classified to obtain a plurality of charging starting working conditions, so that the performance of the battery is protected in order to ensure the most proper target current required by the battery to be charged under each charging starting working condition, the state information under each charging starting working condition can be processed to determine the target current required by the current battery, the technical problem of poor protection effect on the performance of the battery is further solved, and the technical effect of improving the protection effect on the performance of the battery is realized.
Step S108, charging the battery at a future time based on the target current.
In the technical scheme provided in the step S108, the energy storage system may be requested to transmit the target current based on the target current obtained through the charging start condition and the state information, so as to charge the battery at a future time.
For example, when the battery starts to charge, the battery may be identified through the battery state information acquisition module, so that state information is acquired, for example, the number of times of charging is 0, the state information may be transmitted to the charging start condition identification module, the module processes the state information to obtain the charging start condition of the battery, and the charging start condition of the battery is the first time of charging the battery, and the state information and the charging start condition are transmitted to the charging demand calculation module, and the module calculates a target current.
Through the steps S102 to S108, the battery is identified, and the state information of the battery at the current moment is obtained, wherein the state information is used for representing the state of the battery when the battery starts to charge; determining a charging start condition of the battery based on the state information; determining a target current requested by the battery to the energy storage system based on the charging initial working condition and the state information; the battery is charged at a future time based on the target current. That is, when the battery starts to be charged, the embodiment of the application can acquire the state information stored in the battery, can determine the current charging starting working condition of the battery by processing the state information, can obtain the target current requested by the battery to the energy storage system by carrying out the related calculation on the state information under the charging starting working condition of the battery, and can charge the battery by transmitting the target current from the energy storage system.
The above-described method of this embodiment is further described below.
As an optional embodiment, step S104, determining the charging start condition of the battery based on the state information includes: and determining the charging starting working condition of the battery based on the charging times and/or charging time in the state information, the current residual quantity and the charging mark count.
In this embodiment, the charging start condition of the battery may be determined by processing the number of charges and/or the charging time in the state information, the current remaining capacity, and a charging flag count, wherein the charging flag count may be used to characterize the number of times the charging power of the battery during charging is greater than a power threshold.
Optionally, whether the charging initial condition is the first charging of the battery can be determined by whether the charging initial condition identification module is zero for the charging times; the time interval between the charging times and the last charging time and the charging time can be processed to determine whether the charging starting condition is that the battery is charged for a long time; by processing the time interval and the current residual electric quantity, whether the charging initial working condition is overdischarge of the battery or not can be determined; based on the charge flag count, it may be determined whether the charge-on condition is battery maintenance.
As an optional embodiment, step S104, determining the charging start condition of the battery based on the number of charging times and/or charging time in the state information, the current remaining power and the charging flag count, includes: determining that the battery is in a first charging starting condition in response to the charging times being zero; determining that the battery is in a second charging starting condition in response to the charging times being greater than zero and the time interval exceeding a time threshold, wherein the time interval is a time period between the current time of the battery and the last charging time; determining that the battery is in a third charging starting condition in response to the time interval not exceeding the time threshold and the difference between the current remaining capacity and the discharging cut-off capacity threshold being less than or equal to the capacity threshold; determining that the battery is in a fourth charging starting condition in response to the difference between the current remaining capacity and the discharging cut-off capacity threshold being greater than the capacity threshold; and in response to the charge flag count reaching the count threshold, determining that the battery is in a fifth charge start condition.
In this embodiment, when the number of charges is zero, it may be determined that the battery is in the first charge start condition; when the number of charging times is greater than zero and the time interval exceeds the time threshold, determining that the battery is in a second charging starting condition; when the time interval is smaller than or equal to the time threshold value and the difference between the current residual electric quantity and the discharge cut-off electric quantity threshold value is smaller than or equal to the electric quantity threshold value, the battery can be determined to be in a third charging starting working condition; if the difference between the current residual electric quantity and the discharge cut-off electric quantity threshold value is larger than the electric quantity threshold value, the battery can be determined to be in a fourth charging initial working condition; when the charging mark count is larger than or equal to the count threshold value, the battery can be determined to be in a fifth charging starting working condition, wherein the first charging starting working condition can be the first charging working condition of the battery. The time interval may be the period of time between the current time of the battery and the last charging time. The second charge start condition may be a condition in which the battery is not charged for a long time. The discharge cutoff electrical quantity threshold may be used to characterize the battery stopping discharging when the current remaining electrical quantity reaches the threshold. The third charge initiation condition may be a condition where the battery overdischarge. The fourth charge start condition may be a battery normal condition. The communication abnormal condition may be used to characterize the battery or energy storage system as being in an abnormal state. The fifth charge start condition may be a battery maintenance condition.
Optionally, the processing of the state information may be performed through a charging start condition identification module, which may receive the number of times of charging transmitted by the battery state information acquisition module, and determine whether the number of times of charging is zero, and if the number of times of charging of the battery is zero, determine that the charging start condition is the first charging of the battery; if the number of charges of the battery is not zero, it may be indicated that the battery is not charged for the first time.
Optionally, if the number of times of charging the battery is judged to be not zero, the charging start condition identification module may further judge whether the time interval between the last charging time of the battery and the current time is greater than a time threshold, and if the time interval is greater than the time threshold, it may be determined that the charging start condition is that the battery is not charged for a long time; if the time interval is less than or equal to the time threshold, it may be indicated that the battery is charged within the time threshold, where the time threshold may be a preset value or a self-set value. It should be noted that this is only an example, and the time threshold is not particularly limited.
Optionally, if the time interval of battery charging is less than or equal to the time threshold, whether the difference between the current residual electric quantity and the discharge cut-off electric quantity threshold is greater than the electric quantity threshold can be further judged, and if the difference is less than or equal to the electric quantity threshold, the charging starting condition can be determined as battery overdischarge; if the difference is greater than the electric quantity threshold, the charging start working condition can be determined to be a normal working condition, wherein the discharging cut-off electric quantity threshold can be a preset value or a self-set value. It should be noted that, this is merely an example, and the discharge cutoff amount threshold is not particularly limited.
Optionally, the charging start condition identification module may determine whether the charging flag count of the battery reaches a count threshold, and if so, determine that the charging start condition is battery maintenance, where the count threshold may be a preset value or a self-set value, and is merely illustrative, and the count threshold is not specifically limited.
It should be noted that the above method and steps for determining the different charging start conditions of the battery are only illustrative, and the determination method and process are not limited in detail, so long as the method and process for determining the charging start conditions of the battery based on the state information of the battery are within the protection scope of the embodiments of the present invention.
As an optional embodiment, step S106, determining the target current of the battery to the energy storage system based on the charging start condition and the state information, includes: and determining a target current based on the maximum value of the cell voltage of the battery and the first coefficient in response to the charging start condition being the first charging start condition.
In this embodiment, when the charge start condition is the first charge start condition, the target current may be determined by the maximum value of the cell voltage and a first coefficient, wherein the first coefficient may be used to characterize the battery characteristics of the battery and the degree of influence of the battery temperature of the battery on the target current.
Optionally, if the current charging start condition of the battery is that the battery is charged for the first time, state information such as the current remaining capacity of the battery, the voltage of the battery and the temperature of the battery can be obtained, the maximum value of all the voltage of the battery can be determined, the required value of the charging current corresponding to the maximum value of the voltage of the battery can be determined through table lookup, and the target current can be further determined through the following formula:
Iout＝IMAP*K
Wherein I out may represent the target current requested by the battery to the energy storage system; i MAP may represent a charging current demand value output according to a maximum value lookup table of the cell voltage; k may represent a first coefficient, and may be sized according to battery characteristics and battery temperature.
Optionally, if the current charging initial condition of the battery is that the battery is charged for the first time, the current remaining capacity of the battery and the initial capacity of the battery when the battery starts to be charged can be subjected to difference to obtain a difference value between the current remaining capacity of the battery and the initial capacity of the battery, and if the difference value is greater than a first threshold value, the value of the first coefficient can be determined to be 1; the magnitude relation between the maximum value of the cell voltages of the battery and the second threshold may be determined, and if the maximum value of the cell voltages is equal to or greater than the second threshold, the value of the first coefficient may be determined to be 1, and under the two conditions, the target current is equal to the output charging current demand value and may be represented by formula I out＝IMAP.
As an optional embodiment, step S106, determining the target current of the battery to the energy storage system based on the charging start condition and the state information, includes: responding to the charging starting working condition as a second charging starting working condition, wherein the current residual electric quantity is smaller than or equal to a set limit value, and determining a target current based on the maximum value of the cell voltage of the battery and a second coefficient; and determining the target current under the second charging starting condition based on the maximum value of the monomer voltage and the third coefficient in response to the current residual electric quantity being larger than the set limit value.
In this embodiment, when the charging start condition of the battery is the second charging start condition, the magnitude relation between the current remaining capacity of the battery and the set limit value may be determined, and if the current remaining capacity is less than or equal to the set limit value, the target current may be determined by the maximum value of the cell voltage of the battery and the second coefficient; if the current residual capacity is larger than the set limit value, the target current can be determined through the maximum value of the cell voltage of the battery and a third coefficient, wherein the second coefficient can be used for controlling the target current corresponding to the current residual capacity in the low section, and the second coefficient can be used for controlling the target current corresponding to the current residual capacity in the middle section. The set limit value may be a preset value or a self-set value, and is not particularly limited herein.
Optionally, if the current charging start condition of the battery is overdischarge of the battery, state information such as the current remaining capacity of the battery, the cell voltage, the battery temperature and the like can be obtained, the maximum value of all the cell voltages is determined, the required value of the charging current corresponding to the maximum value of the cell voltages can be determined through table lookup, the magnitude relation between the current remaining capacity and the set limit value is judged, and if the current remaining capacity is smaller than or equal to the set limit value, the target current can be determined through the following formula:
Iout＝IMAP*P1
Wherein, P 1 can represent a second coefficient, the value range of the second coefficient is [0.1,0.5 ], and the size can be determined according to the battery characteristics and the battery temperature.
Optionally, if the current remaining power is greater than the set limit value, the target current may be determined by the following formula:
Iout＝IMAP*P2
Wherein, P 2 can represent a third coefficient, the value range of the third coefficient is [0.5,0.8 ], and the size can be determined according to the battery characteristics and the battery temperature.
Optionally, if the current charging initial condition of the battery is overdischarge of the battery, a difference between the current remaining capacity of the battery and the initial capacity of the battery during charging can be obtained, and if the difference is greater than a first threshold value, the target current is equal to the output charging current requirement value; the magnitude relation between the maximum value of the cell voltages of the battery and the second threshold may also be determined, and if the maximum value of the cell voltages is greater than or equal to the second threshold, the target current is equal to the output charging current demand, i.e., I out＝IMAP.
As an optional embodiment, step S106, determining the target current of the battery to the energy storage system based on the charging start condition and the state information, includes: responding to the charging initial condition as a third charging initial condition, and charging the battery based on a preset target current; and determining the target current based on the maximum value of the cell voltage in response to the average value of the cell voltage of the battery reaching a voltage threshold or the charging start condition being a fourth charging start condition.
In this embodiment, when the charging start condition of the battery is the third charging start condition, the relationship between the average value of all the monomer voltages and the voltage threshold value may be determined, and if the average value is smaller than the voltage threshold value, the preset target current may be determined as the target current, so as to charge the battery; if the average value is greater than or equal to the voltage threshold, determining a target current based on a maximum value of the cell voltage; when the charging start condition of the battery is the fourth charging start condition, the target current may be determined based on the maximum value of the cell voltage, where the voltage threshold may be a preset value or a self-set value, and no specific limitation is made herein.
Optionally, when the current charge starting condition of the battery is overdischarge of electric quantity, the relationship between the average value of the single voltage and the voltage threshold value can be judged, if the average value is smaller than the voltage threshold value, the current electric quantity of the battery can be indicated to be too low. It should be noted that, the magnitude of the preset target current is not specifically limited, so long as the process and the method for charging the battery by using the preset target current are within the protection scope of the embodiment of the present invention under the condition that the battery power is too low.
Optionally, the relationship between the average value of the single voltage and the voltage threshold is determined, if the average value is greater than or equal to the voltage threshold, it can be stated that the electric quantity of the battery is no longer in an excessively low state at this time, it can be determined that the battery is in a normal working condition at this time, the maximum value of the current single voltage of the battery can be obtained, the corresponding required value of the charging current can be determined according to a maximum value table lookup, and the target current at this time can be raised to the required value of the charging current at a certain rate from the preset target current, so as to charge the battery.
In the embodiment of the invention, in the process of charging the battery based on the steps, the voltage of a certain single battery continuously rises, if the battery is charged according to the required value of the charging current, the charging efficiency may be reduced, so that the target current needs to be updated in real time, the corresponding required value of the charging current can be determined by looking up a table based on the maximum value of the real-time single voltage, and the required value of the real-time charging electric quantity is determined as the target current of the battery until the battery electric quantity is full, thereby realizing the technical effect of improving the protection effect on the battery performance.
As an optional embodiment, step S106, if the count of the charging flag is less than or equal to the count threshold, obtaining the charging power of the battery; in response to the charging power being greater than the power threshold, incrementing a charging flag count; and responding to the charging starting condition as a fifth charging starting condition, and activating a maintenance mark of the battery, wherein the maintenance mark is used for starting a battery maintenance mode of the battery.
In this embodiment, the charging flag count in the state information of the battery is obtained, the magnitude relation between the charging flag count and the count threshold may be determined, if the charging flag count is less than or equal to the count threshold, the charging power of the battery at this time may be obtained, and the magnitude relation between the charging power of the battery and the power threshold may be further determined, if the charging power is greater than the power threshold, one may be added to the original charging flag count, and when the charging flag count reaches the count threshold, that is, the charging start condition is the fifth start condition, the maintenance flag of the battery may be activated, where the maintenance flag may be used to characterize whether to turn on the battery maintenance mode of the battery.
Optionally, after the battery is in charging connection with the energy storage system, the charging mark count stored in the battery can be obtained, and the relationship between the charging mark count and the counting threshold is judged, if the charging mark count is smaller than or equal to the counting threshold, the charging power of the battery can be calculated in real time in the charging process of the battery, and when the charging power is larger than the power threshold, the charging mark count can be increased by one, and it is required to be noted that the charging mark count can be recorded only once in one charging cycle, and the charging mark count is stored in the battery after the charging is finished.
Optionally, if the charging flag count is greater than the count threshold, that is, the charging start condition of the battery is battery maintenance, the battery maintenance may be started.
For example, if the vehicle is a non-replacement vehicle, when the battery maintenance sign is activated, text information of "battery maintenance mode" may be pushed to the graphical user interface, or may be broadcasted by voice to prompt the user that the battery needs to be maintained, and the user may select a proper time to maintain the battery according to the self time.
For another example, if the vehicle is a battery replacement vehicle, the battery is charged on an energy storage system within the battery replacement station, and if the maintenance flag is activated at this time, the battery maintenance mode may be immediately turned on.
As an alternative embodiment, step S106, setting a target current upper limit for a section of the current residual capacity based on the state information; if the current exceeds the target current upper limit, determining the target current upper limit as the target current; and in response to the maximum value of the cell voltage reaching the full-charge voltage, charging the battery based on a preset target current.
In this embodiment, when the charging start condition is in the fifth start condition, the current remaining capacity of the battery may be divided into intervals based on the acquired state information, and a target current upper limit may be set in each interval, so that the magnitude relation between the current for charging the battery and the target current upper limit may be further determined, and if the current exceeds the target current upper limit, the target current upper limit may be determined as the target current, and the battery may be charged; the magnitude relation between the maximum value of the single voltage of the battery and the full-charge voltage can be judged, and if the maximum value of the single voltage reaches the full-charge voltage, the preset target current can be determined as the target current, and the battery is charged.
Optionally, when the battery maintenance flag is activated, it may be determined that the charging start condition of the current battery is battery maintenance, and if it is determined that the current of the battery is less than or equal to the target current upper limit, charging the battery may be continued with the current as the target current.
Optionally, in the process of charging the battery based on the steps, the cell voltage of the battery can be obtained in real time, the magnitude relation between the maximum value of the cell voltage and the voltage threshold is judged, if the maximum value of the cell voltage is greater than or equal to the voltage threshold, and if the battery is continuously charged by adopting the required value of the charging current corresponding to the maximum value, the performance of the battery can be possibly damaged, and the battery can be charged by adopting a constant-voltage or constant-current mode.
Optionally, in the process of charging the battery based on the steps, the voltage of the battery is continuously increased, when the maximum value of the voltage of the battery reaches the full voltage, if the battery is continuously charged by the current target current, the battery can be damaged due to overlarge current, so in the embodiment of the invention, a small-current constant-current method can be adopted, and in the subsequent charging process, the battery requests the preset target current to the energy storage system to charge the battery, thereby solving the technical problem of poor protection effect of the battery performance. It should be noted that the magnitude of the preset target current is not particularly limited herein.
Optionally, when the battery is fully charged under the charging start condition of the battery maintenance, the charging maintenance flag may be cleared, or the charging flag count may be cleared, stored, and waiting for the next charging cycle, and recounting may be started.
As an optional embodiment, step S106, during the process of charging the battery, determines that the battery is in a communication abnormal state in response to the battery or the energy storage system being in an abnormal state; if the current residual electric quantity is smaller than the overtime protection threshold value and the battery overtime protection is connected again, determining that the overtime protection activation mark of the battery is unchanged, and determining a target current based on the maximum value of the single voltage of the battery; if the current residual electric quantity is greater than or equal to the overtime protection threshold and the battery is successfully reconnected overtime, the overtime protection activation flag is set to be one, and the overtime protection mode is started for the battery.
In this embodiment, during the battery charging process, if the battery or the energy storage system is abnormal, it may be determined that the battery is in a communication abnormal state, and if the timeout reconnection is successful, it may be determined that the current remaining capacity of the battery is related to the timeout protection threshold, if the current remaining capacity is less than the timeout protection threshold, the timeout protection threshold may be determined as zero, the target current may be determined by a maximum value of all the cell voltages of the battery, if the current remaining capacity is greater than or equal to the timeout protection threshold, the timeout protection threshold may be determined as one, and a timeout protection mode may be started for the battery, where the timeout protection activation flag may be used to determine whether to start the timeout protection mode for the battery. The timeout protection threshold may be a preset value or a self-set value. It should be noted that, this is merely an example, and the timeout protection threshold is not particularly limited.
For example, during the battery charging process, the communication abnormal charging protection module may monitor the conditions of the battery and the energy storage system in real time, and may determine whether the battery and the energy storage system are in an abnormal state, and if the battery and/or the energy storage system are in an abnormal state, may determine that the battery is in a communication abnormal state. It should be noted that, the device for monitoring whether the battery and the energy storage device are abnormal is merely illustrative, and not particularly limited.
Optionally, if the battery is in an abnormal communication state of the battery, it can be stated that the battery or the energy storage device is abnormal, at this time, a time-out reconnection stage can be entered, if the time-out reconnection is successful, state information such as a single voltage of the battery and a current residual electric quantity can be obtained in real time, a magnitude relation between the current residual electric quantity of the battery and a time-out protection threshold value is judged, if the current residual electric quantity is smaller than the set time-out protection threshold value, a time-out protection activation flag of the battery can be set to 0, a table look-up can be performed on a maximum value of the single voltage of the battery, a corresponding required value of the charging electric quantity can be determined, and the required value can be determined as a target current to charge the battery.
Optionally, if the timeout reconnection is successful and it is determined that the current remaining capacity is greater than or equal to the set timeout protection threshold, the timeout protection activation flag of the battery may be set to 1, and then the timeout protection mode of the battery may be started. The battery can stop charging due to overlarge target current, so that the battery reaches full charge and cut-off voltage in a very short time, and therefore, in order to avoid the problems, the single voltage of the battery can be obtained in real time, the corresponding required value of the charging electric quantity is determined based on table lookup, the real-time required value is determined to be the target current, and the battery is charged, so that the technical problem of poor protection effect on the battery performance is solved.
Optionally, if the timeout reconnection fails, it may be indicated that the battery or the energy storage device is abnormal, so that charging cannot be continued, and the charging process may be exited, if the timeout protection activation flag of the battery is not zero at this time, zero clearing may be performed, and the maximum value of the monomer voltage stored in the battery may be replaced with the maximum value of the monomer voltage collected in real time at the current time.
In the embodiment of the invention, the battery is identified, and the state information of the battery at the current moment is obtained, wherein the state information is used for representing the state of the battery when the battery starts to charge; determining a charging start condition of the battery based on the state information; determining a target current requested by the battery to the energy storage system based on the charging initial working condition and the state information; the battery is charged at a future time based on the target current. That is, when the battery starts to be charged, the embodiment of the invention can acquire the state information stored in the battery, can determine the current charging starting working condition of the battery by processing the state information, can obtain the target current requested by the battery to the energy storage system by carrying out the related calculation on the state information under the charging starting working condition of the battery, and can charge the battery by transmitting the target current from the energy storage system.
Example 2
The technical solution of the embodiment of the present invention will be illustrated in the following with reference to a preferred embodiment.
At present, with the advocacy of energy conservation and emission reduction in various countries, electric vehicles become the development direction of the current vehicle world. The problem of charging the battery in the electric vehicle is solved, so that better user experience can be provided, and the performance of the battery can be better protected.
In the related art, the battery charging method includes recharging, slow recharging and fast recharging, and when the fast recharging is needed or the charging time is short, the fast recharging mode is selected; and under the conditions of less use frequency and longer free time of users at night and the like, a slow charging mode is selected.
In a related art, an intelligent charge control method of an electric vehicle, a storage medium, and an electric vehicle are provided, wherein a charge connection state includes a slow charge connection state, a fast charge connection state, and a hybrid charge connection state; determining the vehicle utilization time of a user, acquiring power battery information of the vehicle, and calculating the slow battery charging time according to the charging connection state and the power battery information: and carrying out intelligent charging on the power battery according to the relation between the user using time and the battery full-charge time. The method can determine a reasonable electric vehicle charging method according to the vehicle using time of a user and the charging connection state of the vehicle, reduce the damage to the cycle life of the power battery while ensuring that the power battery reaches the full charge state, and improve the vehicle using experience of the user.
In another related art, an intelligent charging control method for an electric vehicle, the electric vehicle and a device are provided. The electric automobile comprises at least two charging modes, and the intelligent charging control method of the electric automobile comprises the following steps: an acquisition step of acquiring an instruction of selecting a charging mode or a default charging mode; and a charging control step, namely charging the power battery of the electric automobile by adopting one charging mode corresponding to the instruction of selecting the charging mode or one charging mode corresponding to the instruction of default charging mode.
However, the above method does not consider different target current requirements of the battery under various charging initial conditions, so the technical problem of poor protection effect on the battery performance still exists.
However, the present invention proposes a battery charge control method. According to the method, the battery state and the battery operation working conditions are monitored, intelligent control of battery charging is realized under different working conditions, the battery performance is protected while the charging speed is improved, the service life of the battery is prolonged as far as possible, the battery charging initial working conditions are identified, whether the battery is in the initial working conditions of normal operation working conditions, battery first charging, battery standing for a long time, battery overdischarge and the like is judged at the initial charging stage, corresponding charging control strategies are formulated aiming at different charging initial working conditions of the battery, and damage to the battery caused by overlarge charging initial current is avoided; setting a corresponding battery protection strategy in the abnormal communication condition, solving the problem that the battery is stopped to be charged when the full charge cut-off voltage is reached in a very short time due to overlarge request current in the process of overtime reconnection of the battery charging end, improving the battery charging quantity as much as possible and prolonging the battery driving mileage; the battery charging strategy can be intelligently adjusted according to the charging habit of the user, so that the problem of capacity attenuation of the battery under the quick charging working condition for a long time is solved; and can compatible trading electric vehicle and non-trading electric vehicle, carry out intelligent propelling movement and maintenance according to the different operation scene of battery to solved the technical problem that the protection effect to battery performance is poor, realized improving the technical effect to the protection effect of battery performance.
The method for controlling the charge of the battery according to the embodiment of the present invention is further described below.
Fig. 2 is a schematic diagram of a charging control system according to an embodiment of the present invention, and as shown in fig. 2, the charging control system 200 may include: the battery state information acquisition module 201, the charging start condition identification module 202, the communication abnormal charging protection module 203, the charging demand calculation module 204 and the energy storage system 205, wherein the charging demand calculation module 204 may include a normal charging mode 2041, a communication abnormal mode 2042 and a battery maintenance mode 2043.
Optionally, the battery state information acquisition module may identify the battery, acquire state information of the battery, and transmit the state information to the charging start condition identification module, the communication abnormal charging protection module and the battery maintenance intelligent identification module, where the state information of the battery may include, but is not limited to: the cell voltage of the battery, the current remaining capacity of the battery, the battery temperature, the total battery voltage, the battery capacity, the battery temperature, and the like.
Optionally, the charging start condition identification module may process the received state information to determine a charging start condition, and in particular, fig. 3 is a flowchart of a method for identifying a charging start condition according to an embodiment of the present invention, as shown in fig. 3, where the method may include the following steps:
Step S301, reads the state information of the battery.
In the technical scheme provided in the step S301 of the present invention, the state information of the battery may be collected by the battery state information collection module and transmitted to the charging start condition identification module, and the module reads the received state information, so that the step S302 may be executed.
Step S302, judging whether the charge mark count reaches a count threshold.
In the technical solution provided in the above step S302 of the present invention, through analysis of the communication anomaly information, it is determined that the battery is not in a communication anomaly state, and the magnitude relation between the received charge flag count and the count threshold may be further determined, if the charge flag count is greater than or equal to the count threshold, step S303 may be executed, and if the charge flag count is less than the count threshold, step S304 may be executed, where the count threshold may be preset data or self-setting data, and this is only illustrative and not specific limitation.
In step S303, the charging start condition is a fifth charging start condition.
In the technical scheme provided in the step S303, the charging mark count is obtained by determining the magnitude relation between the charging mark count and the counting threshold value, and the charging start condition of the battery is determined to be a fifth charging start condition, wherein the fifth charging start condition can be battery maintenance.
Step S304, determine whether the number of charging is 0.
In the technical solution provided in the above step S304 of the present invention, by determining the magnitude relation between the charge flag count and the count threshold, it is obtained that the charge flag count is smaller than the count threshold, and it is further determined whether the read number of charges is zero, if the number of charges is zero, it is indicated that the battery is charged for the first time, step S305 may be performed, and if the number of charges is not zero, it is indicated that the battery is not charged for the first time, and step S306 may be performed.
In step S305, the charging start condition is the first charging start condition.
In the technical scheme provided in the step S305, if the number of charging times is zero through the judgment of the step, the charging start condition of the battery can be determined to be the first charging start condition, wherein the first charging start condition can be the first charging of the battery.
In step S306, it is determined whether the charging time interval is greater than the time threshold.
In the technical scheme provided in the step S306, if the number of charging times is not zero, it may be further determined whether the time interval between the last charging time of the battery and the current time is greater than a time threshold, if the time interval is greater than the time threshold, it may be determined that the charging start condition is that the battery is not charged for a long time, and step S307 may be performed; if the time interval is less than or equal to the time threshold, it may be indicated that the battery is charged within the time threshold, and step S308 may be performed, where the time threshold may be a preset value or a self-set value. It should be noted that this is only an example, and the time threshold is not particularly limited.
In step S307, the charging start condition is the second charging start condition.
In the technical scheme provided in the step S307 of the present invention, if the time interval is greater than the time threshold after the time interval is determined with the time threshold, the charging start condition of the battery may be determined to be a second charging start condition, where the second charging start condition may be that the battery is not charged for a long time.
In step S308, whether the current remaining power difference is smaller than the power threshold.
In the technical solution provided in the above step S308 of the present invention, if the time interval is less than or equal to the time threshold after the time interval is determined with the time threshold, whether the difference between the current remaining capacity and the discharge cut-off capacity threshold is greater than the capacity threshold may be further determined, and if the difference is less than or equal to the capacity threshold, step S309 may be executed; if the difference is greater than the power threshold, step S310 may be performed, where the discharge cutoff power threshold may be a preset value or a self-set value. It should be noted that, this is merely an example, and the discharge cutoff amount threshold is not particularly limited.
In step S309, the charging start condition is a third charging start condition.
In the technical solution provided in the above step S309, if the difference between the current remaining power and the discharge cutoff power threshold is less than or equal to the power threshold after the judgment, the charge start condition of the battery may be determined to be a third charge start condition, where the third charge start condition may be overdischarge of the battery.
In step S310, the charging start condition is a fourth charging start condition.
In the technical scheme provided in the step S310, if the difference between the current remaining power and the discharge cut-off power threshold is greater than or equal to the power threshold after the judgment, it may be determined that the charge start condition of the battery is a normal condition.
It should be noted that the above method and steps for determining the different charging start conditions of the battery are only illustrative, and the determination method and process are not limited in detail, so long as the method and process for determining the charging start conditions of the battery based on the state information of the battery are within the protection scope of the embodiments of the present invention.
In the embodiment of the invention, the communication abnormal charge protection module can detect the conditions of the battery and the energy storage system in real time in the battery charging process, can judge whether the battery and the energy storage system are in an abnormal state, and can determine that the battery is in a communication abnormal state if the battery and/or the energy storage system are in the abnormal state.
Optionally, the charging demand calculation module may be divided into three parts, a normal charging mode, a communication abnormal mode and a battery maintenance mode, where the normal charging mode may be used to calculate the target current requested by the battery to the energy storage system under the first charging start condition to the fourth charging start condition. The communication abnormal mode can be used for calculating the target current of the battery requested by the energy storage system if the battery is in the abnormal battery communication state in the charging process. The battery maintenance mode may be used to calculate a target current requested by the battery to the energy storage system under a fifth charge initiation condition.
Optionally, when the charging start condition is the first charging start condition, the normal charging mode may obtain state information such as a current remaining capacity of the battery, a cell voltage, a battery temperature, etc., determine a maximum value of all cell voltages, determine a required value of a charging current corresponding to the maximum value of the cell voltage by looking up a table, and further determine a target current by the following formula:
Iout＝IMAP*K
Wherein I out may represent the target current requested by the battery to the energy storage system; i MAP may represent a charging current demand value output according to a maximum value lookup table of the cell voltage; k may represent a first coefficient, and may be sized according to battery characteristics and battery temperature.
Optionally, if the current charging start condition of the battery is that the battery is charged for the first time, the current remaining capacity of the battery and the initial capacity of the battery when the battery starts to be charged can be differentiated to obtain a difference value between the current remaining capacity of the battery and the initial capacity of the battery, and the relationship between the maximum value in the single voltage of the battery and the second threshold value can be judged, if the following two conditions exist, the target current is equal to the output charging current requirement value, which can be represented by the formula I out＝IMAP: if the difference is greater than the first threshold; the maximum value of the monomer voltage is greater than or equal to the second threshold value.
Optionally, when the charging start condition is the second charging start condition, the normal charging mode may acquire state information such as a current remaining capacity of the battery, a single voltage, a battery temperature, and the like, determine a maximum value among all the single voltages, determine a required value of a charging current corresponding to the maximum value of the single voltage by looking up a table, determine a magnitude relation between the current remaining capacity and a set limit value, and if the current remaining capacity is less than or equal to the set limit value, determine a target current by the following formula:
Iout＝IMAP*P1
Wherein, P 1 can represent a second coefficient, the value range of the second coefficient is [0.1,0.5 ], and the size can be determined according to the battery characteristics and the battery temperature.
Optionally, if the current remaining power is greater than the set limit value after the normal charging mode is determined, the target current may be determined according to the following formula:
Iout＝IMAP*P2
Wherein, P 2 can represent a third coefficient, the value range of the third coefficient is [0.5,0.8 ], and the size can be determined according to the battery characteristics and the battery temperature.
Optionally, the normal charging mode may perform a difference between the current remaining capacity of the battery and the initial capacity of the battery during charging to obtain a difference therebetween, or determine a magnitude relation between a maximum value in the cell voltage of the battery and the second threshold, where if the following two cases exist, the target current is equal to the output charging current requirement value, which may be represented by the formula I out＝IMAP: the difference is greater than a first threshold; the maximum value of the monomer voltage is greater than or equal to the second threshold value.
Optionally, when the charging start condition is the third charging start condition, the normal charging mode may determine a magnitude relation between an average value of the monomer voltage and the voltage threshold, and if the average value is smaller than the voltage threshold, it may indicate that the current electric quantity of the battery is too low, in the embodiment of the present invention, under the condition of overdischarge of the electric quantity, in order to avoid damage to the battery caused by excessive target current, a small-current constant-current method can be adopted, and the battery requests the preset target current to the energy storage system for charging in the whole process that the average value is smaller than the voltage threshold value, so that the technical effect of improving the protection effect on the battery performance is realized. It should be noted that, the magnitude of the preset target current is not specifically limited, so long as the process and the method for charging the battery by using the preset target current are within the protection scope of the embodiment of the present invention under the condition that the battery power is too low.
Optionally, the normal charging mode may determine a relationship between an average value of the single voltage and a voltage threshold, if the average value is greater than or equal to the voltage threshold, it may be indicated that the electric quantity of the battery is no longer in an excessively low state at this time, it may be determined that the battery is in a normal working condition at this time, a maximum value of the current single voltage of the battery may be obtained, a corresponding required value of the charging current may be determined according to a table look-up of the maximum value, and the target current at this time may be raised from a preset target current to the required value of the charging current at a certain rate, so as to charge the battery.
Optionally, in the process of charging the battery based on the steps, the voltage of a certain single battery continuously rises, if the battery is charged according to the required value of the charging current, the charging efficiency may be reduced, so that the target current needs to be updated in real time, the normal charging mode can be based on the maximum value of the real-time single voltage, the required value of the corresponding charging current can be determined by looking up a table, the required value of the real-time charging electric quantity is determined as the target current of the battery until the battery electric quantity is full, and the technical effect of improving the protection effect on the battery performance is achieved.
Optionally, when the charging start condition is the fifth charging start condition, the battery maintenance mode divides the current residual capacity of the battery into interval sections based on the acquired state information, and sets a target current upper limit for each interval section, so that the magnitude relation between the current for charging the battery and the target current upper limit can be further determined.
Optionally, if the present current exceeds the target current upper limit, the battery maintenance mode may determine the target current upper limit as the target current and charge the battery; the magnitude relation between the maximum value of the single voltage of the battery and the full-charge voltage can be judged, and if the maximum value of the single voltage reaches the full-charge voltage, the preset target current can be determined as the target current, and the battery is charged.
Optionally, when the battery maintenance flag is activated, it may be determined that the charging start condition of the current battery is battery maintenance, and if it is determined that the current of the battery is less than or equal to the target current upper limit, the battery maintenance mode may continue to charge the battery with the current as the target current.
Optionally, in the process of charging the battery based on the steps, the battery maintenance mode may acquire the single voltage of the battery in real time, determine the magnitude relation between the maximum value of the single voltage and the voltage threshold, and if the maximum value of the single voltage is greater than or equal to the voltage threshold, charge the battery in a constant voltage or constant current manner, look up the voltage threshold, determine the required value of the charging current corresponding to the voltage threshold as the target current, and charge the battery.
Optionally, in the process of charging the battery based on the steps, the cell voltage of the battery is continuously increased, when the maximum value of the cell voltage reaches the full-charge voltage, the battery maintenance mode may adopt a small-current constant-current method, and in the subsequent charging process, the battery requests a preset target current to the energy storage system to charge the battery.
In the embodiment of the invention, if the battery is in the abnormal communication state of the battery, the abnormal communication mode can be used for indicating that the battery or the energy storage device is abnormal, and the abnormal communication mode can be used for carrying out overtime reconnection, if the overtime reconnection is successful, state information such as the single voltage of the battery and the current residual electric quantity can be obtained in real time, the size relation between the current residual electric quantity of the battery and the overtime protection threshold value is judged, if the current residual electric quantity is smaller than the set overtime protection threshold value, the overtime protection activation flag can be set to 0, the maximum value of the single voltage of the battery can be checked, the corresponding required value of the charging electric quantity can be determined, the required value can be determined as the target current, and the battery is charged.
Optionally, if the timeout is repeated to be successful and the communication abnormal mode judges that the current residual electric quantity is greater than or equal to the set timeout protection threshold, the timeout protection activation flag can be set to 1, and then the timeout protection mode can be started.
Optionally, if the timeout reconnection fails, it may be indicated that the battery or the energy storage device is abnormal, so that charging cannot be continued, and then the communication abnormal mode may exit the charging flow, if the timeout protection activation flag is not zero at this time, zero clearing may be performed, and the maximum value of the monomer voltage stored in the battery is replaced with the maximum value of the monomer voltage collected in real time at the current time.
When the battery starts to be charged, the embodiment of the invention can acquire the state information stored in the battery, can determine the current charging starting condition of the battery by processing the state information, can obtain the target current requested by the battery to the energy storage system by carrying out relevant calculation on the state information under the charging starting condition of the battery, and can charge the battery by transmitting the target current from the energy storage system.
Example 3
According to the embodiment of the invention, a battery charging control device is also provided. The battery charge control device may be used to execute the battery charge control method in embodiment 1.
Fig. 4 is a schematic view of a charge control device of a battery according to an embodiment of the present invention. As shown in fig. 4, the charge control device 400 may include: an acquisition unit 402, a first determination unit 404, a second determination unit 406, and a charging unit 408.
And an obtaining unit 402, configured to identify the battery, and obtain state information of the battery at a current time, where the state information is used to ensure a state of the battery when charging is started.
The first determining unit 404 is configured to determine a charging start condition of the battery based on the state information.
The second determining unit 406 is configured to determine a target current requested by the battery to the energy storage system based on the charging start condition and the state information.
And a charging unit 408 for charging the battery at a future time based on the target current.
Alternatively, the first determining unit 404 may include: the first determining module is used for determining the charging starting working condition of the battery based on the charging times and/or charging time in the state information, the current residual electric quantity and the charging mark count.
Optionally, the first determining module may include: the first determining submodule is used for determining that the battery is in a first charging starting working condition in response to the charging times being zero; the second determining submodule is used for determining that the battery is in a second charging starting working condition in response to the charging times being greater than zero and the time interval exceeding a time threshold, wherein the time interval is a time period between the current time of the battery and the last charging time; the third determining submodule is used for determining that the battery is in a third charging starting working condition in response to the fact that the time interval does not exceed the time threshold value and the difference between the current residual electric quantity and the discharging cut-off electric quantity threshold value is smaller than or equal to the electric quantity threshold value; a fourth determining submodule, configured to determine that the battery is in a fourth charging start condition in response to a difference between the current remaining capacity and a discharge cutoff capacity threshold being greater than the capacity threshold; and a fifth determination submodule for determining that the battery is in a fifth charging start condition in response to the charging flag count reaching the count threshold.
Alternatively, the second determining unit 406 may include: and the second determining module is used for determining a target current based on the maximum value of the cell voltage of the battery and a first coefficient in response to the charging starting condition being a first charging starting condition, wherein the first coefficient is used for representing the battery characteristic of the battery and the influence degree of the battery temperature of the battery on the target current.
Alternatively, the second determining unit 406 may include: the third determining module is used for determining a target current based on the maximum value of the single voltage of the battery and a second coefficient in response to the charging starting condition being a second charging starting condition, and the current residual electric quantity being smaller than or equal to a set limit value; and the fourth determining module is used for determining the target current under the second charging starting working condition based on the maximum value of the monomer voltage and the third coefficient in response to the fact that the current residual electric quantity is larger than the set limit value.
Alternatively, the second determining unit 406 may include: the first processing module is used for responding to the charging initial working condition as a third charging initial working condition and charging the battery based on a preset target current; and a fifth determining module, configured to determine the target current based on a maximum value of the cell voltage in response to the average value of the cell voltages of the battery reaching a voltage threshold or the charging start condition being a fourth charging start condition.
Alternatively, the second determining unit 406 may include: the acquisition module is used for acquiring the charging power of the battery if the charging mark count is smaller than or equal to the count threshold value; a calculation module for incrementing a charge flag count in response to the charge power being greater than a power threshold; and the activation module is used for responding to the charging starting working condition as a fifth charging starting working condition and activating a maintenance mark of the battery, wherein the maintenance mark is used for starting a battery maintenance mode of the battery.
Alternatively, the activation module may include: a setting sub-module, configured to set a target current upper limit for a section of the current residual electric quantity based on the state information; a seventh determining sub-module, configured to determine the target current upper limit as the target current if the present current exceeds the target current upper limit; and the switching sub-module is used for charging the battery based on a preset target current in response to the maximum value of the single voltage reaching the full-charge voltage.
Optionally, the charging control device 400 may further include: a third determining unit, configured to determine that the battery is in a communication abnormal state in response to the battery or the energy storage system being in an abnormal state during charging of the battery; the first processing unit is used for determining that the overtime protection activation mark of the battery is unchanged if the current residual electric quantity is smaller than the overtime protection threshold value and the battery is successfully reconnected overtime, and determining the target current based on the maximum value of the single voltage of the battery, wherein the overtime protection activation mark is used for determining whether to start an overtime protection mode for the battery; and the second processing unit is used for setting the overtime protection activation flag to be one and starting the overtime protection mode for the battery if the current residual electric quantity is greater than or equal to the overtime protection threshold and the battery is successfully reconnected overtime.
According to the embodiment of the invention, the battery is identified through the acquisition unit, and the state information of the battery at the current moment is acquired, wherein the state information is used for representing the state of the battery when the battery starts to charge; determining a charging start condition of the battery based on the state information through a first determining unit; determining a charging start condition of the battery based on the state information through a second determining unit; determining a target current requested by the battery to the energy storage system based on the charging initial working condition and the state information; the battery is charged at the future time based on the target current through the charging unit, so that the technical problem of poor protection effect on the battery performance is solved, and the technical effect of improving the protection effect on the battery performance is realized.
Example 4
According to an embodiment of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program executes the battery charge control method described in embodiment 1.
Example 5
According to an embodiment of the present invention, there is also provided a processor for running a program, wherein the program executes the battery charge control method described in embodiment 1.
Example 6
According to an embodiment of the present invention, there is also provided a vehicle for performing the charge control method of the battery of the embodiment of the present invention.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (7)
1. A method of controlling charge of a battery, the method comprising:
Identifying a battery and acquiring state information of the battery at the current moment, wherein the state information is used for representing the state of the battery when the battery starts to charge;
Determining a charging start condition of the battery based on the state information;
Determining a target current requested by the battery to an energy storage system based on the charging start condition and the state information;
Charging the battery at a future time based on the target current;
The state information includes a charging frequency, a charging time, a current remaining capacity and a charging sign count, wherein determining a charging start condition of the battery based on the state information includes: determining that the battery is in a first charging starting condition in response to the charging times being zero; determining that the battery is in a second charging starting condition in response to the charging times being greater than zero and a time interval exceeding a time threshold, wherein the time interval is a time period between the current time of the battery and the last charging time; determining that the battery is in a third charging start condition in response to the time interval not exceeding the time threshold and the difference between the current remaining capacity and a discharging cut-off capacity threshold being less than or equal to a capacity threshold; determining that the battery is in a fourth charging start condition in response to the difference between the current remaining capacity and a discharging cut-off capacity threshold being greater than a capacity threshold; determining that the battery is in a fifth charging start condition in response to the charging flag count reaching a count threshold;
Determining a target current requested by the battery to an energy storage system based on the charging start condition and the state information, including: responding to the charging starting working condition as a second charging starting working condition, wherein the current residual electric quantity in the state information is smaller than or equal to a set limit value, and determining the target current based on the maximum value of the cell voltage of the battery and a second coefficient; and determining the target current under the second charging starting condition based on a maximum value of the single voltage and a third coefficient in response to the current residual electric quantity being larger than the set limit value, wherein the second coefficient and the third coefficient are determined based on the battery temperature of the battery.
2. The method of claim 1, wherein determining the target current of the battery to an energy storage system based on the charge start condition and the state information comprises:
And determining the target current based on a maximum value of the cell voltage of the battery and a first coefficient in response to the charging start condition being the first charging start condition, wherein the first coefficient is used for representing battery characteristics of the battery and the influence degree of the battery temperature of the battery on the target current.
3. The method of claim 1, wherein determining the target current of the battery to an energy storage system based on the charge start condition and the state information comprises:
responding to the charging starting condition as the third charging starting condition, and charging the battery based on a preset target current;
And determining the target current based on the maximum value of the single voltage in response to the average value of the single voltage of the battery reaching a voltage threshold or the charging start condition being the fourth charging start condition.
4. The method according to claim 1, wherein the method further comprises:
If the charging mark count is smaller than or equal to the count threshold, acquiring the charging power of the battery;
In response to the charging power being greater than a power threshold, incrementing the charging flag count;
And responding to the charging starting working condition as the fifth charging starting working condition, and activating a maintenance mark of the battery, wherein the maintenance mark is used for starting a battery maintenance mode of the battery.
5. The method according to claim 4, wherein the method further comprises:
Setting a target current upper limit for the interval section of the current residual electric quantity based on the state information;
If the current exceeds the target current upper limit, determining the target current upper limit as the target current;
Determining the target current based on a voltage threshold in response to a maximum value of a cell voltage reaching the voltage threshold;
and charging the battery based on a preset target current in response to the maximum value of the cell voltage reaching a full-charge voltage.
6. The method according to claim 1, wherein the method further comprises:
In the process of charging the battery, responding to the abnormal state of the battery or the energy storage system, and determining that the battery is in a communication abnormal state;
If the current residual electric quantity is smaller than a timeout protection threshold value and the battery is successfully reconnected in a timeout, determining that a timeout protection activation flag of the battery is unchanged, and determining the target current based on the maximum value of the single voltage of the battery, wherein the timeout protection activation flag is used for determining whether to start a timeout protection mode for the battery;
And if the current residual electric quantity is greater than or equal to the overtime protection threshold and the battery is successfully reconnected overtime, setting the overtime protection activation flag to be one, and starting the overtime protection mode for the battery.
7. A vehicle, characterized by being adapted to perform the method of any one of claims 1 to 6.
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| KR101867225B1 (en) * | 2017-03-31 | 2018-06-12 | 지엠 글로벌 테크놀러지 오퍼레이션스 엘엘씨 | Lithium-ion battery quick charging method |
| WO2019144274A1 (en) * | 2018-01-23 | 2019-08-01 | 深圳易马达科技有限公司 | Method, device and system for controlling charging of battery |
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| CN111428893A (en) * | 2020-03-24 | 2020-07-17 | 中国第一汽车股份有限公司 | Battery management method, device, server and storage medium |
| CN111551868B (en) * | 2020-05-08 | 2022-04-12 | 浙江吉利控股集团有限公司 | Consistency analysis method for lithium iron phosphate battery system |
| KR102681017B1 (en) * | 2021-01-28 | 2024-07-03 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | Charging method and power conversion device |
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