CN115047352A - Method and device for calculating remaining battery charging time and vehicle - Google Patents
Method and device for calculating remaining battery charging time and vehicle Download PDFInfo
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- CN115047352A CN115047352A CN202210849736.0A CN202210849736A CN115047352A CN 115047352 A CN115047352 A CN 115047352A CN 202210849736 A CN202210849736 A CN 202210849736A CN 115047352 A CN115047352 A CN 115047352A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Abstract
The embodiment of the application provides a method and a device for calculating the remaining battery charging time and a vehicle, wherein the method comprises the following steps: under the condition that the battery is in a charging state, acquiring the current charging current of the battery; determining a current charging stage of the battery, wherein the charging stage of the battery is divided into N charging stages in advance, and N is a positive integer greater than 1; determining M required currents and M battery capacities corresponding to the battery in M charging stages, wherein the M charging stages comprise the current charging stage and the residual charging stage after the current charging stage; and calculating the remaining charging time of the battery according to the current charging current, the M required currents and the M battery capacities. Because the charging current of the battery is in a changing state in the charging process, the remaining charging time of the battery is calculated according to the current charging current, the current charging stage, the required current in the remaining charging stage after the current charging stage and the battery capacity, and the accuracy of calculating the remaining charging time can be improved.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a method and a device for calculating remaining battery charging time and a vehicle.
Background
The power battery is used as an important assembly part of the electric vehicle, and needs to be charged under the condition of insufficient electric power so as to meet the requirements of users. In the charging process, the calculation of the residual charging time of the battery can provide guidance for a user to use the vehicle, and the user can reasonably arrange the vehicle according to the self condition, so that unnecessary waiting time is reduced.
Currently, the remaining battery charging time is estimated by dividing the charging capacity by the actual charging current, and the calculation of the remaining battery charging time is not accurate enough.
Disclosure of Invention
The embodiment of the application provides a method and a device for calculating the remaining charging time of a battery and a vehicle, and can solve the problem that the calculation of the remaining charging time is not accurate enough by adopting the existing remaining charging time calculation method.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a method for calculating a remaining battery charging time, including:
under the condition that a battery is in a charging state, acquiring the current charging current of the battery;
determining a current charging stage of the battery, wherein the charging stage of the battery is divided into N charging stages in advance, and N is a positive integer greater than 1;
determining M required currents and M battery capacities of the battery corresponding to M charging phases, wherein the M charging phases comprise the current charging phase and a residual charging phase after the current charging phase;
and calculating the remaining charging time of the battery according to the current charging current, the M required currents and the M battery capacities.
In a second aspect, an embodiment of the present application provides a device for calculating a remaining battery charging time, including:
the device comprises an acquisition module, a charging module and a control module, wherein the acquisition module is used for acquiring the current charging current of a battery under the condition that the battery is in a charging state;
the first determination module is used for determining the current charging stage of the battery, wherein the charging stage of the battery is divided into N charging stages in advance, and N is a positive integer greater than 1;
a second determining module, configured to determine M required currents and M battery capacities of the battery in M charging phases, where the M charging phases include the current charging phase and a remaining charging phase after the current charging phase;
and the calculation module is used for calculating the residual charging time of the battery according to the current charging current, the M required currents and the M battery capacities.
In a third aspect, embodiments of the present application further provide a vehicle, including a processor, a memory, and a program or instructions stored on the memory and executable on the processor, where the program or instructions, when executed by the processor, implement the steps of the method for calculating the remaining battery charging time as described above.
In the embodiment of the application, the current charging current of the battery is acquired under the condition that the battery is in a charging state; determining a current charging stage of the battery, wherein the charging stage of the battery is divided into N charging stages in advance, and N is a positive integer greater than 1; determining M required currents and M battery capacities of the battery corresponding to M charging stages, wherein the M charging stages comprise a current charging stage and a residual charging stage after the current charging stage; and calculating the residual charging time according to the current charging current, the M required currents and the M battery capacities. Because the charging current of the battery is in a changing state in the charging process, the remaining charging time of the battery is calculated according to the current charging current, the current charging stage, the required current in the remaining charging stage after the current charging stage and the battery capacity, and the accuracy of calculating the remaining charging time can be improved.
Drawings
Fig. 1 is a flowchart illustrating a method for calculating a remaining battery charging time according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a device for calculating remaining battery charging time according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. As used in this application, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
The method for calculating the remaining battery charging time according to the embodiments of the present application is described in detail below with reference to the accompanying drawings.
The embodiment of the application is suitable for the power battery of the new energy automobile. The power battery charging method comprises a conventional charging mode and a quick charging mode. In specific implementation, the conventional charging methods include a constant current charging method, a constant voltage charging method, a step charging method, and the like. The conventional charging mode is used for charging the electric vehicle with lower charging current, and the charging time is generally longer and can reach 10-20 hours; the conventional charging mode has lower installation cost of the charger, and the household charging facilities (vehicle-mounted charger) and the vehicle charging station of the electric vehicle mostly adopt the charging mode. The charging period can fully utilize the electric power off-peak period to charge, thereby reducing the charging cost, improving the charging efficiency and prolonging the service life of the battery. The quick charging mode comprises a pulse type charging method, a variable current intermittent charging method, a variable voltage intermittent charging method and the like, the quick charging mode charges the storage battery by using higher charging current in a short time, the charging time is short and can be completed within 10-30min, and the charger of the quick charging mode has relatively higher installation cost, lower charging efficiency and certain influence on the service life of the storage battery.
Taking a constant voltage charging method as an example, in the charging process of the power battery, the power battery is charged with a constant first current, and as the voltage continuously rises, when the voltage reaches a certain value, the power battery is continuously charged with the constant first voltage, at this time, the charging current drops until the power battery is fully charged, and the charging process is finished.
Referring to fig. 1, fig. 1 is a flowchart illustrating a remaining battery charging time according to an embodiment of the present disclosure, wherein the remaining battery charging time calculating method includes the following steps:
The current charging current of the battery may be obtained through third-party software, or may be obtained through testing with tools such as a multimeter and a power meter, which is not limited in this embodiment.
As an example, in the case that the power battery is charged through the charging pile, a testing tool may be connected in series between the power battery and the charging pile, and the current charging current may be obtained through the testing tool.
In specific implementation, after a plurality of sets of tests are performed on the battery, the whole charging process of the battery can be divided into a plurality of charging stages according to at least one parameter of battery temperature, battery voltage, battery capacity and charging current. The charging current can be the maximum allowable charging current confirmed at different temperatures according to the specification of the battery cell; the battery voltage and the battery capacity can be obtained by adjusting the available capacity of the battery pack to 0ah after the 1C monomer discharges to the monomer cut-off voltage at normal temperature, charging to the cut-off voltage with constant charging current after the battery pack is adjusted to the corresponding temperature, and recording a charging curve.
In an optional embodiment, as the charging continues, the battery voltage gradually increases, and the current charging stage of the battery may be finally determined to be a certain charging stage of the N charging stages by comparing the current charging voltage of the battery with the battery voltages in the N pre-divided charging stages.
103, determining M required currents and M battery capacities corresponding to the battery in M charging stages, wherein the M charging stages comprise a current charging stage and a residual charging stage after the current charging stage;
after the charging phase of the battery is determined through step 102, since the required current and the battery capacity of the battery in different charging phases are different in different charging phases, in addition, the required current and the battery capacity of the battery are continuously changed as the remaining charging time is continuously shortened.
In specific implementation, when the battery is charged in the first charging stage, the required current and the battery capacity corresponding to the battery in the first charging stage are respectively I 1 And C 1 When the charging voltage of the battery reaches V 1 Then, the battery enters into the second charging stage, and the required current and the battery capacity corresponding to the battery in the second charging stage are I 2 And C 2 And analogizing in sequence, the battery enters the Nth charging stage, and the required current and the battery capacity corresponding to the battery in the Nth charging stage are I N And C N 。
And step 104, calculating the remaining charging time of the battery according to the current charging current, the M required currents and the M battery capacities.
In the specific implementation, the current charging current and the minimum value of the current required by the battery in each charging stage after the current charging stage can be obtained, the value is the charging current of the battery in each charging stage in the charging process of the battery, in addition, the battery capacity of the battery in the current charging stage and the battery capacities of all charging stages after the current charging stage are obtained, and the ratio of the battery capacity of the battery in each charging stage to the charging current corresponding to each charging stage is added, so that the remaining charging time of the battery is obtained. The accuracy of the calculation of the remaining charge time can be improved compared to directly determining the ratio of the battery capacity and the charge current as the battery charge time.
In the embodiment of the application, the current charging current of the battery is acquired under the condition that the battery is in a charging state; determining a current charging phase of the battery; determining M required currents and M battery capacities of the battery corresponding to M charging stages, wherein the M charging stages comprise a current charging stage and a residual charging stage after the current charging stage; and calculating the residual charging time according to the current charging current, the M required currents and the M battery capacities. Because the charging current of the battery is in a changing state in the charging process, the remaining charging time of the battery is calculated according to the current charging current, the current charging stage, the required current in the remaining charging stage after the current charging stage and the battery capacity, and the accuracy of calculating the remaining charging time can be improved.
In some optional embodiments, step 102, determining the current charging phase of the battery comprises:
acquiring the current voltage and the current temperature of the battery;
and determining charging stages of the battery corresponding to the current voltage and the current temperature as the current charging stage according to a pre-created multi-step charging voltmeter, wherein the multi-step charging voltmeter comprises voltages respectively corresponding to the N charging stages at P battery temperatures, and P is a positive integer greater than 1.
The current voltage of the battery can be acquired through third-party software, and can also be acquired through testing by tools such as a multimeter and a power meter, the current temperature of the battery can be acquired through the third-party software, and can also be acquired through temperature detection equipment, and the method is not limited in this embodiment.
In specific implementation, the pre-created multi-step charging voltage table comprises charging voltages which are acquired through a plurality of groups of battery tests and respectively correspond to each charging stage at different battery temperatures. In this embodiment, the current charging stage of the battery at the current voltage and the current temperature is determined to be a certain charging stage corresponding to the multi-step charging voltmeter by comparing the acquired current voltage and the acquired current temperature of the battery with the battery temperature and the battery voltage in the multi-step charging voltmeter.
In some alternative embodiments, the battery may be a lithium ion battery, specifically, the following is a multi-step charging voltmeter:
wherein, because lithium ion battery operating temperature: the temperature of P batteries in the multi-step charging voltmeter can be any value from-20 ℃ to 55 ℃, but generally the performance of the lithium ion battery is reduced when the temperature is lower than 0 ℃, and the discharging capability is correspondingly reduced, so the working temperature of the lithium ion battery with complete performance is usually 0-40 ℃. The activity of the battery cell can be influenced by overhigh and overlow temperature, irreversible damage can be caused, and the service life of the battery cell can be influenced. In a specific implementation, when charging the electric vehicle, if the battery temperature is lower than 0 ℃, the battery needs to be preheated before charging, which may increase the charging process and be not beneficial to the maintenance of the battery. Certainly, the temperatures of the lithium ion batteries required in some special environments are different, and some lithium ion batteries can normally operate even in an environment of hundreds of degrees celsius, which is not limited in this embodiment.
In this embodiment, the acquired current voltage and current temperature of the battery are compared with the charging voltage and battery temperature in the pre-created multi-step charging voltmeter, and the charging stage corresponding to the current voltage and current temperature is determined as the current charging stage.
Optionally, the battery includes a plurality of single battery cells, the current voltage is a maximum voltage value of the plurality of single battery cells, and the current temperature is a highest battery temperature of the plurality of single battery cells.
In specific implementation, due to the requirement of the capacity of the battery, the battery can be a power supply formed by connecting a plurality of single battery cells in series and parallel through conductive connecting pieces, and is fixed at a design position through a process and a structure, so that the function of charging, discharging and storing electric energy is cooperatively exerted.
In some optional embodiments, the determining M required currents and M battery capacities of the battery in M charging phases includes:
determining M required currents and M battery capacities corresponding to the battery in M charging stages according to a multi-step charging current table and a multi-step charging capacity table which are created in advance;
wherein the multi-step charging current meter includes a required current corresponding to the N charging phases at the P battery temperatures, and the multi-step charging capacity meter includes a battery capacity corresponding to the N charging phases at the P battery temperatures.
The multistep charging current meter and the multistep charging capacity meter and the multistep charging voltmeter are all related battery data obtained after a plurality of groups of tests are carried out on the battery. Specifically, the multi-step charging current meter includes the required current corresponding to each battery charging stage at different battery temperature points, and the multi-step charging capacity meter includes the battery capacity corresponding to each battery charging stage at different battery temperature points.
Specifically, the following is a multi-step charge capacity table:
specifically, the following is a multi-step charging ammeter:
in this embodiment, battery parameters such as required current and battery capacity of the battery at different charging stages can be directly obtained through the pre-created multi-step charging capacity table and the multi-step charging current table, so that the calculation accuracy of the remaining charging time is improved.
In some optional embodiments, step 104 includes:
when the current charging stage is the ith charging stage before the Nth charging stage, calculating the remaining charging time of the battery according to the following formula:
T＝C i /min(Ir i ,Ic)+C i+1 /min(Ir i+1 ,Ic)+C i+2 /min(Ir i+2 ,Ic)+…+C N /min(Ir N ,Ic)；
when the current charging stage is the Nth charging stage, calculating the remaining charging time of the battery according to the following formula:
T＝C N /min(Ir N ,Ic)；
wherein T is the remaining charging time, Ci is the charging capacity of the battery in the ith charging stage, Ir i And the required current of the battery in the ith charging phase is Ic, the current charging current is Ic, and N is a positive integer greater than 1.
In this embodiment, the whole charging phase of the battery is divided into N charging phases, specifically, the charging time of the battery in the ith charging phase is the battery capacity of the battery in the ith charging phase, the current charging current Ic and the required current Ir in the ith charging phase i The ratio of the minimum value of (a) to (b) can be inferred, and after determining the current charging phase of the battery, the remaining charging time of the battery in the current charging phase is the sum of the charging time of the current charging phase and the charging time of all charging phases after the current charging phase.
In a specific implementation, the nth stage is the last charging stage of the battery, and the ith charging stage may be any charging stage before the nth charging stage, or may be the nth charging stage, i is a positive integer less than or equal to N.
In the case that I is a positive integer less than N, namely the current charging stage of the battery is any charging stage from the first charging stage to the N-1 charging stage, the multi-battery capacities of the battery in the ith charging stage and all charging stages after the ith charging stage are obtained according to the multi-step charging capacity table and the multi-step charging current table, and a plurality of required currents corresponding to the battery in the ith charging stage and all charging stages after the ith charging stage, wherein the charging time of each charging stage is the ratio of the battery capacity of each charging stage to the required current corresponding to each charging stage, since the charging of the battery is a continuous process, the current charging current is compared with the current demand of the battery in each charging stage, and the minimum value between the two is taken as the charging current, so that the accuracy of calculating the residual charging time of the battery can be improved.
Under the condition that I is equal to a positive integer of N, namely the current charging stage of the battery is the last charging stage, the battery capacity of the battery in the Nth charging stage and the required current of the battery in the Nth charging stage are obtained according to the multi-step charging capacity table and the multi-step charging current table, wherein the charging time of the last charging stage can be the ratio of the battery capacity of the last charging stage to the required current corresponding to the last charging stage, and because the battery charging is a continuous and uninterrupted process, the current charging current and the required current of the battery in the last charging stage are compared, and the minimum value between the current charging current and the required current is taken as the charging current, so that the accuracy of calculating the residual charging time of the battery can be improved.
In some optional embodiments, the step 101 of obtaining the current charging current of the battery with the battery in the charging state may include:
and under the condition that the battery is in a charging state and the charging time of the battery is greater than or equal to a first time threshold value, acquiring the current charging current of the battery.
The first time threshold is a preset time value, the charging current of the battery is judged to be in a relatively stable state under the condition that the charging time of the battery is greater than or equal to the first time threshold, and the charging current obtained through a related detection tool or third-party detection software is the current charging current. For example: the first time threshold is 1 min.
In some optional embodiments, step 101, obtaining a current charging current of the battery when the battery is in a charging state, may further include:
when a battery is in a charging state, and an absolute difference value between a first charging current and a second charging current of the battery is smaller than a first threshold, acquiring a current charging current of the battery, wherein the first charging current is an average current in a first time period, the second charging current is an average current in a second time period, and the first time period and the second time period are two time periods in the first time threshold.
The first threshold is a preset current value. When the battery is in a charging state and the charging time for starting charging the battery is less than a first time threshold, comparing the difference between the charging currents in two adjacent or nonadjacent time periods in the first time threshold with a preset first threshold, and when the difference between the charging currents in the two adjacent or nonadjacent time periods is less than the first threshold, judging that the current charging current is stable, wherein the charging current obtained by a related detection tool or third-party detection software is the current charging current. For example: the first threshold is 1A.
Optionally, when the battery is in a charging state and the charging time for starting charging the battery is less than the first time threshold, the current charging current may be compared with the required current in the multi-step charging current meter, and when the current charging current is greater than a certain percentage of the required current, it is determined that the current is stable, and the current charging current is obtained. Wherein the percentage may be eighty percent.
Optionally, after step 104, the method further includes:
under the condition that the calculated residual charging time is not equal to the currently displayed first residual charging time, correcting the first residual charging time according to the relation between the calculated residual charging time and the currently displayed first residual charging time to obtain second residual charging time;
changing the currently displayed first remaining time to the second remaining charging time.
The first remaining charging time can be displayed on an instrument display screen in the vehicle, or can be displayed on a conventional applicable display screen such as a mobile phone display screen connected with the vehicle in advance, and details are not repeated herein.
And correcting the first residual charging time according to the relationship between the calculated residual charging time of the battery and the currently displayed first residual charging time to obtain second residual charging time, wherein the second residual charging time is the residual charging time closer to the current moment, and displaying the second residual charging time.
In a theoretical case, it is considered that the calculated remaining charging time is displayed on the display screen in real time, that is, the calculated remaining charging time is equal to the currently displayed first remaining charging time, the remaining charging time gradually becomes shorter as the charging process continues, and the first remaining charging time and the remaining charging time displayed on the display screen decrease at the same speed. For example: when the remaining charge time is decreased at a rate equal to 1, at this time, the first remaining charge time is decreased at the same rate of 1.
In an actual situation, the calculated remaining charging time may not be equal to the currently displayed first remaining charging time due to display aging, unstable charging current, and the like.
Specifically, in the case where the calculated remaining charging time is less than the first remaining charging time, the first remaining charging time is corrected at a first decreasing rate.
Wherein the first rate of decrease may be calculated according to the following equation:
R1＝T1/T；
and correcting the first remaining charge time at a first rising rate when the calculated remaining charge time is greater than the first remaining charge time.
Wherein the second rate of decrease may be calculated according to the following equation:
R2＝(T1-T+T*0.6)/T*0.6；
wherein, R1 is the first falling rate, R2 is the second falling rate, T1 is the first remaining charging time, and T is the remaining charging time.
In addition, in a specific implementation, the first remaining charging time T1 may be subjected to range limitation, such as: the first remaining charging time is 0-400 min.
In addition, in the case where the battery is fully charged, both the remaining charge time and the first remaining charge time are 0.
Referring to fig. 2, an embodiment of the present invention further provides a device for calculating remaining battery charging time, including:
the device comprises an acquisition module, a charging module and a control module, wherein the acquisition module is used for acquiring the current charging current of a battery under the condition that the battery is in a charging state;
the first determination module is used for determining the current charging stage of the battery, wherein the charging stage of the battery is divided into N charging stages in advance, and N is a positive integer greater than 1;
a second determining module, configured to determine M required currents and M battery capacities of the battery in M charging phases, where the M charging phases include the current charging phase and a remaining charging phase after the current charging phase;
and the calculation module is used for calculating the residual charging time of the battery according to the current charging current, the M required currents and the M battery capacities.
Optionally, the first determining module includes:
the first acquisition unit is used for acquiring the current voltage and the current temperature of the battery;
the first determining unit is used for determining charging stages of the battery corresponding to the current voltage and the current temperature as a current charging stage according to a pre-created multi-step charging voltage table, wherein the multi-step charging voltage table comprises voltages respectively corresponding to the N charging stages at P battery temperatures, and P is a positive integer greater than 1.
Optionally, the battery includes a plurality of single battery cells, the current voltage is a maximum voltage value of the plurality of single battery cells, and the current temperature is a maximum battery temperature of the plurality of single battery cells.
Optionally, the second determining module includes:
the second determining unit is used for determining M required currents and M battery capacities corresponding to the battery in M charging stages according to a multi-step charging current table and a multi-step charging capacity table which are created in advance;
wherein the multi-step charging current meter includes a required current corresponding to the N charging phases at the P battery temperatures, and the multi-step charging capacity meter includes a battery capacity corresponding to the N charging phases at the P battery temperatures.
Optionally, the calculation module includes:
when the current charging stage is the ith charging stage before the Nth charging stage, calculating the remaining charging time of the battery according to the following formula:
T＝C i /min(Ir i ,Ic)+C i+1 /min(Ir i+1 ,Ic)+C i+2 /min(Ir i+2 ,Ic)+…+C N /min(Ir N ,Ic)；
when the current charging stage is the Nth charging stage, calculating the remaining charging time of the battery according to the following formula:
T＝C N /min(Ir N ,Ic)；
wherein T is the remaining charging time, Ci is the charging capacity of the battery in the ith charging stage, Ir i And the required current of the battery in the ith charging phase is Ic, the current charging current is Ic, and N is a positive integer greater than 1.
Optionally, the obtaining module includes any one of:
the second acquisition unit is used for acquiring the current charging current of the battery under the condition that the battery is in a charging state and the charging time of the battery is greater than or equal to a first time threshold value;
the third obtaining unit is configured to obtain a present charging current of the battery when the battery is in a charging state and an absolute difference between a first charging current and a second charging current of the battery is smaller than a first threshold, where the first charging current is an average current in a first time period, the second charging current is an average current in a second time period, and the first time period and the second time period are two time periods within the first time threshold.
Optionally, the method further includes:
the correction module is used for correcting the first residual charging time according to the relation between the calculated residual charging time and the currently displayed first residual charging time under the condition that the calculated residual charging time is not equal to the currently displayed first residual charging time, so that second residual charging time is obtained;
a display module for changing the currently displayed first remaining time to the second remaining charging time.
Optionally, the modification module includes:
a first correction unit configured to correct the first remaining charging time at a first decreasing rate when the calculated remaining charging time is less than the first remaining charging time;
a second correcting unit, configured to correct the first remaining charging time at a first rising rate when the calculated remaining charging time is greater than the first remaining charging time.
It should be noted that the device corresponds to the method for calculating the remaining battery charging time shown in fig. 1, and all the embodiments of the method for calculating the remaining battery charging time shown in fig. 1 are applicable to the embodiment of the device, and can achieve the same technical effects.
The embodiment of the present application further provides a vehicle, which includes a processor, a memory, and a program or an instruction stored in the memory and executable on the processor, wherein the program or the instruction, when executed by the processor, implements the steps of the vehicle pedal adjustment method as described above, and can achieve the same technical effects, and the steps are not repeated herein in order to avoid repetition.
While the present embodiments have been described with reference to the accompanying drawings, the present embodiments are not limited to the above-described embodiments, which are merely illustrative and not restrictive, and it will be apparent to those of ordinary skill in the art that many more modifications and variations can be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for calculating a remaining battery charging time, comprising:
under the condition that a battery is in a charging state, acquiring the current charging current of the battery;
determining a current charging stage of the battery, wherein the charging stage of the battery is divided into N charging stages in advance, and N is a positive integer greater than 1;
determining M required currents and M battery capacities of the battery corresponding to M charging phases, wherein the M charging phases comprise the current charging phase and a residual charging phase after the current charging phase;
and calculating the remaining charging time of the battery according to the current charging current, the M required currents and the M battery capacities.
2. The method of claim 1, wherein the determining the current charge phase of the battery comprises:
acquiring the current voltage and the current temperature of the battery;
and determining the charging stages of the battery corresponding to the current voltage and the current temperature as the current charging stage according to a pre-created multi-step charging voltmeter, wherein the multi-step charging voltmeter comprises voltages respectively corresponding to the N charging stages at P battery temperatures, and P is a positive integer greater than 1.
3. The method of claim 2, wherein the battery comprises a plurality of cell cells, wherein the current voltage is a maximum voltage value of the plurality of cell cells, and wherein the current temperature is a maximum battery temperature of the plurality of cell cells.
4. The method of claim 2, wherein said determining M required currents and M battery capacities of said battery over M charging phases comprises:
determining M required currents and M battery capacities corresponding to the battery in M charging stages according to a multi-step charging current table and a multi-step charging capacity table which are created in advance;
wherein the multi-step charging current meter includes a required current corresponding to the N charging phases at the P battery temperatures, and the multi-step charging capacity meter includes a battery capacity corresponding to the N charging phases at the P battery temperatures.
5. The method of claim 1, wherein said calculating a remaining charge time of said battery based on said present charge current, said M demand currents, and said M battery capacities comprises:
when the current charging stage is the ith charging stage before the Nth charging stage, calculating the remaining charging time of the battery according to the following formula:
T＝C i /min(Ir i ,Ic)+C i+1 /min(Ir i+1 ,Ic)+C i+2 /min(Ir i+2 ,Ic)+…+C N /min(Ir N ,Ic)；
when the current charging stage is the Nth charging stage, calculating the remaining charging time of the battery according to the following formula:
T＝C N /min(Ir N ,Ic)；
wherein T is the remaining charging time, Ci is the charging capacity of the battery in the ith charging stage, Ir i And the required current of the battery in the ith charging phase is Ic, the current charging current is Ic, and N is a positive integer greater than 1.
6. The method according to claim 1, wherein the obtaining the current charging current of the battery with the battery in the charging state comprises any one of the following steps:
under the condition that a battery is in a charging state and the charging time of the battery is greater than or equal to a first time threshold value, acquiring the current charging current of the battery;
when a battery is in a charging state, and an absolute difference value between a first charging current and a second charging current of the battery is smaller than a first threshold, acquiring a current charging current of the battery, wherein the first charging current is an average current in a first time period, the second charging current is an average current in a second time period, and the first time period and the second time period are two time periods in the first time threshold.
7. The method of claim 1, wherein after said calculating a remaining charge time of said battery from said present charge current, said M demand currents and said M battery capacities, said method further comprises:
under the condition that the calculated residual charging time is not equal to the currently displayed first residual charging time, correcting the first residual charging time according to the relation between the calculated residual charging time and the currently displayed first residual charging time to obtain second residual charging time;
changing the currently displayed first remaining time to the second remaining charging time.
8. The method according to claim 7, wherein in the case that the calculated remaining charging time is not equal to the currently displayed first remaining charging time, the modifying the first remaining charging time according to the relationship between the calculated remaining charging time and the currently displayed first remaining charging time to obtain a second remaining charging time comprises:
under the condition that the calculated remaining charging time is less than the first remaining charging time, correcting the first remaining charging time at a first decreasing rate;
and under the condition that the calculated residual charging time is greater than the first residual charging time, correcting the first residual charging time at a first rising rate.
9. A device for calculating a remaining charging time of a battery, comprising:
the device comprises an acquisition module, a charging module and a control module, wherein the acquisition module is used for acquiring the current charging current of a battery under the condition that the battery is in a charging state;
the first determination module is used for determining the current charging stage of the battery, wherein the charging stage of the battery is divided into N charging stages in advance, and N is a positive integer greater than 1;
a second determining module, configured to determine M required currents and M battery capacities of the battery in M charging phases, where the M charging phases include the current charging phase and a remaining charging phase after the current charging phase;
and the calculation module is used for calculating the residual charging time of the battery according to the current charging current, the M required currents and the M battery capacities.
10. A vehicle comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the battery remaining charge time calculation method according to any one of claims 1 to 8.
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