CN112421721B - Electric vehicle power management method, device, equipment and storage medium - Google Patents

Electric vehicle power management method, device, equipment and storage medium Download PDF

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Publication number
CN112421721B
CN112421721B CN202011260714.8A CN202011260714A CN112421721B CN 112421721 B CN112421721 B CN 112421721B CN 202011260714 A CN202011260714 A CN 202011260714A CN 112421721 B CN112421721 B CN 112421721B
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electric quantity
battery
storage battery
value
real
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CN112421721A (en
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莫金伟
周大为
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Changzhou Yiertong Electronics Co ltd
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Changzhou Yiertong Electronics Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
    • 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
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/22—Balancing the charge of battery modules
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/005—Detection of state of health [SOH]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Abstract

The application relates to a power management method, a device, equipment and a storage medium for an electric vehicle, wherein the method comprises the following steps: starting timing and storing formed timing information in a database while charging the storage battery; respectively detecting and acquiring the voltage and the current of each single battery in the storage battery when the storage battery is charged; calculating and obtaining the real-time electric quantity of each single battery according to the timing information in the database and the acquired voltage and current of each single battery; and discharging partial single batteries according to the current real-time electric quantity condition of each single battery until the electric quantities among the single batteries are basically consistent. The application has the technical effects that: the electric quantity difference among the single batteries is small in the charging process of the storage battery, the overall balance of the battery pack is improved, and therefore the service life of the lead-acid storage battery is prolonged.

Description

Electric vehicle power management method, device, equipment and storage medium
Technical Field
The present disclosure relates to the field of power management technologies for electric vehicles, and in particular, to a method, an apparatus, a device and a storage medium for power management of an electric vehicle.
Background
The battery of the electric vehicle is a power source on the electric vehicle, most of the electric vehicles are provided with lead-acid storage batteries, and the lead-acid storage batteries have low cost and high cost performance. Since this battery can be charged and used repeatedly, it is called a "lead-acid battery".
Lead acid battery comprises a plurality of battery cells, when charging lead acid battery, because the performance between the different battery cells can have certain difference unavoidably for charging amount also is different between the different battery cells in the same time, thereby makes lead acid battery when charging the equilibrium of whole group battery relatively poor, and then leads to lead acid battery's life to be shorter.
Disclosure of Invention
In order to solve the problem that the service life of a lead-acid storage battery is short, the application provides a power management method, a device, equipment and a storage medium for an electric vehicle.
In a first aspect, the present application provides an electric vehicle power management method, which adopts the following technical scheme: the method comprises the following steps: starting timing and storing formed timing information in a database while charging the storage battery;
respectively detecting and acquiring the voltage and the current of each single battery in the storage battery when the storage battery is charged;
calculating and obtaining the real-time electric quantity of each single battery according to the timing information in the database and the acquired voltage and current of each single battery;
and discharging partial single batteries according to the current real-time electric quantity condition of each single battery until the electric quantity among the single batteries is approximately kept in a consistent state.
Through the technical scheme, the electric quantity of each single battery is detected in real time in the process of charging the storage battery, the discharging operation is carried out on part of the single batteries with higher electric quantity, the charging efficiency of the part of the single batteries is reduced, so that the single batteries can obtain basically the same electric quantity in unit time, the overall balance of the battery pack is improved, and the service life of the lead-acid storage battery is prolonged.
Preferably, the discharging part of the single batteries according to the current electric quantity condition of each single battery comprises:
carrying out average calculation on the real-time electric quantity of each single battery and obtaining standard electric quantity;
and respectively judging whether the current electric quantity of each single battery is greater than the standard electric quantity, if so, executing discharging operation on the single batteries until the electric quantity of the single batteries reaches the standard electric quantity.
Through the technical scheme, the single batteries with the electric quantity higher than the standard electric quantity are subjected to discharging operation, so that the electric quantity of each single battery can be basically maintained near the average value; the average value is used as the standard electric quantity, so that the discharge capacity of each single battery can be maintained in a reasonable range, the possibility that the charging efficiency of the storage battery is influenced by excessive discharge of part of the single batteries is reduced, and the overall charging efficiency of the storage battery is improved.
Preferably, the calculating the average value of the real-time electric quantities of the single batteries and obtaining the standard electric quantity includes:
calculating the average value of the real-time electric quantity of the plurality of single batteries according to the real-time electric quantity of each single battery;
comparing the real-time electric quantity of each single battery to obtain a real-time electric quantity value with the minimum value;
and carrying out average calculation on the average value of the real-time electric quantity and the electric quantity value with the minimum value to obtain standard electric quantity.
Through above-mentioned technical scheme, the electric quantity value of standard electric quantity more approaches to the setting of minimum electric quantity, has reduced the battery charging in-process, and the difference between minimum electric quantity in the battery cell and the average electric quantity is great, leads to the group battery to be difficult to reach the possibility of reasonable equilibrium standard to the regulating effect of group battery electric quantity equilibrium has further been promoted.
Preferably, the method further comprises:
respectively carrying out numerical comparison on the electric quantity of the plurality of single batteries when the charging of the storage battery is finished to obtain a minimum electric quantity value;
setting an initial electric quantity value of the storage battery according to the minimum electric quantity value;
acquiring the current speed of the electric vehicle and the real-time electric quantity value of the single battery corresponding to the initial electric quantity value in real time in the running process of the electric vehicle;
calculating a remaining mileage coefficient according to the speed of the electric vehicle and the power consumption condition of the storage battery; the remaining mileage coefficient is the mileage traveled by the electric vehicle during the electric quantity consumption of the preset percentage of the initial electric quantity value;
obtaining the current remaining mileage data of the electric vehicle according to the remaining mileage coefficient;
and sending the current remaining mileage data to a display device on the electric vehicle so that the display device can display the remaining mileage data of the electric vehicle.
Through the technical scheme, the display equipment on the electric vehicle can display the remaining mileage data that the electric vehicle can continue to travel in real time according to the electric quantity condition of the electric vehicle storage battery, so that a user can adjust the stroke at any time or charge the storage battery of the electric vehicle in time according to the displayed remaining mileage data, and the user experience degree is improved.
Preferably, the calculating the remaining mileage coefficient according to the speed of the electric vehicle and the power consumption of the battery includes:
accumulating the acquired speed of the current electric vehicle;
judging whether the electric quantity consumption value of the single battery corresponding to the initial electric quantity value reaches a preset percentage of the initial electric quantity value; if so, carrying out integral calculation on the acquired speed of the electric vehicle to obtain the traveling mileage of the electric vehicle;
and dividing the traveling mileage of the electric vehicle by the current electric quantity consumption value to obtain a remaining mileage coefficient.
By the technical scheme, the remaining mileage coefficient is obtained by measuring the speed of the electric vehicle in real time and taking the integral, the degree of association between the remaining mileage coefficient and the current unit speed is improved, and the accuracy of the remaining mileage data is further improved.
Preferably, the initial electric quantity value of the storage battery is set according to the minimum electric quantity value; the method comprises the following steps:
acquiring current temperature data of the storage battery;
searching a correction coefficient corresponding to the current temperature data in a preset temperature correction coefficient table according to the acquired temperature data;
and correcting the minimum electric quantity value according to the correction coefficient and setting the corrected result as the initial electric quantity value of the storage battery.
Through the technical scheme, the initial electric quantity value of the storage battery is corrected according to the detected current temperature, so that the influence of the temperature on the calculation process of the remaining mileage data is reduced, and the accuracy of the remaining mileage data is further improved.
Preferably, the method further comprises:
acquiring the current temperature of the storage battery and the current capacity of the storage battery in real time;
calculating and obtaining the reduction proportion of the battery capacity according to the initial capacity value of the storage battery corresponding to the current temperature and the current capacity value of the storage battery;
obtaining the residual service life of the storage battery according to the reduction ratio of the capacity of the storage battery and the standard service life of the storage battery;
and sending the residual service life of the storage battery to display equipment so that the display equipment can display the residual service life data of the storage battery.
Through the technical scheme, the setting that shows is carried out the battery remaining life in real time makes the user can know the remaining life condition of battery at any time to in time change the battery that reaches life for the user, reduced the ageing possibility that leads to the electric motor car damage of battery, promoted the security of electric motor car.
In a second aspect, the present application provides an electric vehicle power management device, which adopts the following technical solution: the device comprises:
the charging timing module is used for starting timing and storing formed timing information in a database while charging the storage battery;
the data detection module is used for respectively detecting and acquiring the voltage and the current of each single battery in the storage battery when the storage battery is charged;
the electric quantity calculation module is used for calculating and obtaining the real-time electric quantity of each single battery according to the timing information in the database and the acquired voltage and current of each single battery;
and the battery discharging module is used for discharging partial single batteries according to the current real-time electric quantity condition of each single battery until the electric quantities among the single batteries are basically consistent.
Through the technical scheme, the electric quantity of each single battery is detected in real time in the process of charging the storage battery, the discharging operation is carried out on part of the single batteries with higher electric quantity, the charging efficiency of the part of the single batteries is reduced, so that the single batteries can obtain basically the same electric quantity in unit time, the overall balance of the battery pack is improved, and the service life of the lead-acid storage battery is prolonged.
In a third aspect, the present application provides a computer device, which adopts the following technical solution: comprising a memory and a processor, the memory having stored thereon a computer program that can be loaded by the processor and executed in any of the above-described methods of electric vehicle power management.
Through the technical scheme, the electric quantity of each single battery is detected in real time in the process of charging the storage battery, the discharging operation is carried out on part of the single batteries with higher electric quantity, the charging efficiency of the part of the single batteries is reduced, so that the single batteries can obtain basically the same electric quantity in unit time, the overall balance of the battery pack is improved, and the service life of the lead-acid storage battery is prolonged.
In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solutions: a computer program is stored which can be loaded by a processor and which implements any of the above-described methods of electric vehicle power management.
Through the technical scheme, the electric quantity of each single battery is detected in real time in the process of charging the storage battery, the discharging operation is carried out on part of the single batteries with higher electric quantity, the charging efficiency of the part of the single batteries is reduced, so that the single batteries can obtain basically the same electric quantity in unit time, the overall balance of the battery pack is improved, and the service life of the lead-acid storage battery is prolonged.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the method has the advantages that the discharging operation is synchronously performed on partial single batteries in the process of charging the storage battery, so that the electric quantity among the single batteries can be basically kept consistent, the overall balance of the battery pack is improved, and the service life of the lead-acid storage battery is prolonged;
2. the battery management method can display the remaining mileage data and the remaining service life of the storage battery of the electric vehicle, and improves the user experience.
Drawings
FIG. 1 is a flowchart of an electric vehicle power management method according to an embodiment of the present application.
Fig. 2 is a flowchart illustrating the sub-step of S40 in the embodiment of the present application.
Fig. 3 is a flowchart illustrating sub-steps of S50 in an embodiment of the present application.
Fig. 4 is a flowchart illustrating sub-steps of S60 in an embodiment of the present application.
Fig. 5 is a block diagram of the structure of the electric vehicle power management device in the embodiment of the present application.
Reference numerals: 300. a charging timing module; 301. a data detection module; 302. an electric quantity calculating module; 303. a temperature correction module; 304. a battery discharge module; 305. a mileage calculation module; 306. and a life calculating module.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses a power management method for an electric vehicle.
As shown in fig. 1, the method comprises the steps of:
s10, generating and storing the timing information.
Specifically, the timing is started at the same time when the battery of the electric vehicle starts to perform a charging operation, and the formed timing information is synchronously stored in a database for calling.
And S20, detecting and acquiring the voltage and current of each single battery in the storage battery.
Specifically, during the process of charging the storage battery, the voltage and current of each single battery are detected and recorded.
And S30, calculating the real-time electric quantity of each single battery.
Specifically, according to the timing information in the database and the detected voltage and current of the single battery, the charging time, the voltage and the current corresponding to each single battery are multiplied respectively to obtain the real-time electric quantity of each single voltage; i.e. the current value of the electric charge inside the battery cell.
And S40, adjusting the balance degree of the storage battery pack.
With reference to fig. 2, step S40 includes the following sub-steps:
s401, calculating the real-time electric quantity average value of a plurality of single batteries.
Specifically, according to the calculated current electric quantity of the plurality of single batteries, the electric quantity values of the plurality of single batteries are subjected to average value calculation to obtain the average value of the real-time electric quantity of the plurality of single batteries.
And S402, comparing to obtain the real-time electric quantity value with the minimum value.
Specifically, the real-time electric quantity values of the plurality of single batteries are subjected to relatively large and small operations, so that the real-time electric quantity value with the minimum numerical value is obtained, and if the real-time electric quantity value with the minimum numerical value is a plurality of real-time electric quantity values, one of the real-time electric quantity values is selected.
And S403, calculating to obtain the standard electric quantity.
Specifically, the average value of the real-time electricity amount and the average value of the real-time electricity amount value having the smallest value are calculated, and the average value is set as the standard electricity amount.
S404, respectively judging whether the current electric quantity of each single battery is larger than the standard electric quantity.
Specifically, the real-time electric quantity value of each single battery is compared with the standard electric quantity, if the real-time electric quantity value of a certain single battery is larger than the standard electric quantity value according to the judgment result, the single battery is discharged by using a discharge circuit until the real-time electric quantity value of the single battery reaches the standard electric quantity value; otherwise, no action is taken; the discharge setting is carried out on part of the single batteries, so that the real-time electric quantity values of the plurality of single batteries can be basically maintained near the standard electric quantity value, the overall balance of the battery pack is improved, and the service life of the lead-acid storage battery is prolonged; meanwhile, the value of the standard electric quantity is closer to the setting of the minimum real-time electric quantity value, the discharging range of the single battery is improved, and therefore the flexibility of the battery pack in the discharging process is further improved.
And S50, outputting the remaining mileage data of the electric vehicle.
With reference to fig. 3, step S50 includes the following sub-steps:
and S501, comparing to obtain a minimum electric quantity value after charging is finished.
Specifically, after the storage battery is charged, the electric quantities of the single batteries are respectively detected, the minimum electric quantity value in the electric quantities of the single batteries is obtained through comparison, and if the minimum electric quantity value is multiple, one of the minimum electric quantity values is selected.
And S502, acquiring a temperature correction coefficient.
Specifically, the current temperature data of the storage battery is detected and acquired, and a correction coefficient corresponding to the current temperature data is correspondingly inquired in a preset temperature correction coefficient table according to the detected temperature value; the temperature correction coefficient table is composed of historical records of influence degree data of a large number of temperatures on the electric quantity of the storage battery; for example, the correction coefficient is 0.95 at a temperature of 26 ℃ or 24 ℃.
S503, an initial electric quantity value is set.
Specifically, the minimum electric quantity value is multiplied by the correction coefficient, and the result of the multiplication is set as the initial electric quantity value.
And S504, acquiring a residual mileage coefficient.
Specifically, the speed of the current electric vehicle is detected and acquired in real time, and the speed values are accumulated; simultaneously detecting the real-time electric quantity value of the single battery corresponding to the initial electric quantity value in real time; when the electric quantity value consumed by the single battery reaches a preset percentage of the initial electric quantity value, performing integral calculation on the acquired speed of the electric vehicle to obtain the traveling mileage of the electric vehicle, and then dividing the traveling mileage of the electric vehicle by the current electric quantity consumption value to obtain a remaining mileage coefficient; for example, if the preset percentage is set to be 1%, the remaining mileage coefficient is the mileage traveled by the electric vehicle during the consumption of the electric quantity of 1% of the initial electric quantity value, and the unit is km/Ah.
And S505, displaying the remaining mileage of the electric vehicle.
Particularly, the remaining mileage coefficient is the mileage that can be exercised by consuming the electric quantity of the initial electric quantity value preset percentage under the current speed of a motor vehicle, so the remaining mileage coefficient is multiplied by the percentage of the electric quantity value of the current electric vehicle to obtain the mileage data of the current remaining practical electric vehicle, the obtained remaining mileage data of the electric vehicle is sent to the display screen of the electric vehicle, the display screen can display the remaining mileage data of the electric vehicle to a user in real time according to the received data, the user can know the mileage of the electric vehicle which can continue to be driven at any time, and the experience of the user is improved.
And S60, outputting the residual service life data of the storage battery.
With reference to fig. 4, S60 specifically includes the following sub-steps:
s601, the reduction ratio of the battery capacity is calculated.
Specifically, the current temperature of the storage battery and the current capacity of the storage battery are obtained in real time, and the reduction proportion of the current capacity of the storage battery is calculated according to the initial capacity of the storage battery corresponding to the current temperature; for example, when the capacity of the battery measured at 25 ℃ is 21.6AH and the standard capacity of the battery at that temperature is 24AH, the rate of decrease in the capacity of the battery is 10%.
And S602, displaying the residual service life of the storage battery.
Specifically, when the battery capacity of the storage battery is reduced to 80% of the initial capacity, the residual life of the storage battery is generally judged to be over, and the residual life of the storage battery can be obtained according to the reduction proportion of the current storage battery and the standard life of the storage battery; for example, the reduction rate of the battery capacity is 10%, the standard life of the battery is 6 years, and the known end of life is the reduction of 20% of the battery capacity, the remaining life of the current battery is 3 years; the data transmission that will reachd the battery surplus life is to the display screen of electric motor car on to the display screen can show the surplus life-span of battery to the user in real time according to the battery surplus life data that receive, so that the user can in time know the surplus life-span condition of electric motor car battery, and in time change the battery of life-span end, thereby further promoted user's experience degree.
The implementation principle of the embodiment of the application is as follows: in the process of charging the storage battery of the electric vehicle, the electric quantity of the plurality of single batteries can be basically maintained near the standard electric quantity in a discharging mode of the single batteries with the electric quantity higher than the standard electric quantity, so that the overall balance of the battery pack is improved, and the service life of the lead-acid storage battery is prolonged; meanwhile, in the running process of the electric vehicle, the remaining mileage of the electric vehicle and the remaining life of the storage battery can be calculated in real time by using the power management method, and the remaining mileage of the electric vehicle and the remaining life of the storage battery are displayed in real time by using the display device on the electric vehicle, so that a user can know the service life and the remaining electric quantity condition of the battery of the electric vehicle at any time, and the experience degree of the user is improved.
Based on the method, the embodiment of the application also discloses a power management device of the electric vehicle.
As shown in fig. 5, the apparatus includes the following modules:
a charging timing module 300 for starting timing and storing the formed timing information in a database while charging the storage battery;
the data detection module 301 is configured to detect and obtain a voltage and a current of each single battery in the storage battery when the storage battery is charged;
the electric quantity calculation module 302 is configured to calculate and obtain a real-time electric quantity of each single battery according to the timing information in the database and the acquired voltage and current of each single battery;
the temperature correction module 303 is configured to correct the detected electric quantity value of the storage battery according to a correction coefficient corresponding to the current temperature;
the battery discharging module 304 is configured to discharge a part of the single batteries according to the current real-time electric quantity condition of each single battery until the electric quantities of the single batteries are substantially consistent;
and the mileage calculating module 305 is configured to calculate a remaining mileage coefficient, obtain remaining mileage data of the current electric vehicle according to the remaining mileage coefficient, and send the remaining mileage data to the electric vehicle display device for display.
And the service life calculating module 306 is used for calculating the reduction ratio of the capacity of the storage battery, calculating the remaining service life of the current storage battery according to the reduction ratio, and sending the remaining service life data to the display equipment of the electric vehicle for displaying.
The embodiment of the application also discloses computer equipment.
Specifically, the computer device comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and executes the electric vehicle power management method.
The embodiment of the application also discloses a computer readable storage medium.
Specifically, the computer-readable storage medium, which stores a computer program that can be loaded by a processor and executes the above-described electric vehicle power management method, includes, for example: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (8)

1. An electric vehicle power management method, characterized in that the method comprises:
starting timing and storing formed timing information in a database while charging the storage battery;
respectively detecting and acquiring the voltage and the current of each single battery in the storage battery when the storage battery is charged;
calculating and obtaining the real-time electric quantity of each single battery according to the timing information in the database and the acquired voltage and current of each single battery;
discharging partial single batteries according to the current real-time electric quantity condition of each single battery until the electric quantity among the single batteries approaches to a consistent state;
the discharging part of the single batteries according to the current electric quantity condition of each single battery comprises the following steps:
carrying out average calculation on the real-time electric quantity of each single battery and obtaining standard electric quantity;
respectively judging whether the current electric quantity of each single battery is greater than the standard electric quantity, if so, executing discharging operation on the single batteries until the electric quantity of the single batteries reaches the standard electric quantity;
the calculating the average value of the real-time electric quantity of each single battery and obtaining the standard electric quantity comprises the following steps:
calculating the average value of the real-time electric quantity of the plurality of single batteries according to the real-time electric quantity of each single battery;
comparing the real-time electric quantity of each single battery to obtain a real-time electric quantity value with the minimum value;
and carrying out average calculation on the average value of the real-time electric quantity and the electric quantity value with the minimum value to obtain standard electric quantity.
2. The electric vehicle power management method of claim 1, further comprising:
respectively carrying out numerical comparison on the electric quantity of the plurality of single batteries when the charging of the storage battery is finished to obtain a minimum electric quantity value;
setting an initial electric quantity value of the storage battery according to the minimum electric quantity value;
acquiring the current speed of the electric vehicle and the real-time electric quantity value of the single battery corresponding to the initial electric quantity value in real time in the running process of the electric vehicle;
calculating a remaining mileage coefficient according to the speed of the electric vehicle and the power consumption condition of the storage battery; the remaining mileage coefficient is the mileage traveled by the electric vehicle during the electric quantity consumption of the preset percentage of the initial electric quantity value;
obtaining the current remaining mileage data of the electric vehicle according to the remaining mileage coefficient;
and sending the current remaining mileage data to a display device on the electric vehicle so that the display device can display the remaining mileage data of the electric vehicle.
3. The electric vehicle power management method according to claim 2,
the step of calculating the remaining mileage coefficient according to the speed of the electric vehicle and the power consumption condition of the storage battery comprises the following steps:
accumulating the acquired speed of the current electric vehicle;
judging whether the electric quantity consumption value of the single battery corresponding to the initial electric quantity value reaches a preset percentage of the initial electric quantity value; if so, carrying out integral calculation on the acquired speed of the electric vehicle to obtain the traveling mileage of the electric vehicle;
and dividing the traveling mileage of the electric vehicle by the current electric quantity consumption value to obtain a remaining mileage coefficient.
4. The electric vehicle power management method according to claim 2, wherein the setting of the initial charge value of the storage battery is performed according to the minimum charge value; the method comprises the following steps:
acquiring current temperature data of the storage battery;
searching a correction coefficient corresponding to the current temperature data in a preset temperature correction coefficient table according to the acquired temperature data;
and correcting the minimum electric quantity value according to the correction coefficient and setting the corrected result as the initial electric quantity value of the storage battery.
5. The electric vehicle power management method according to claim 1,
the method further comprises the following steps:
acquiring the current temperature of the storage battery and the current capacity of the storage battery in real time;
calculating and obtaining the reduction proportion of the battery capacity according to the initial capacity value of the storage battery corresponding to the current temperature and the current capacity value of the storage battery;
obtaining the residual service life of the storage battery according to the reduction ratio of the capacity of the storage battery and the standard service life of the storage battery;
and sending the residual service life of the storage battery to display equipment so that the display equipment can display the residual service life data of the storage battery.
6. An electric vehicle power management apparatus, comprising:
the charging timing module (300) is used for starting timing and storing formed timing information in a database while charging the storage battery;
the data detection module (301) is used for respectively detecting and acquiring the voltage and the current of each single battery in the storage battery when the storage battery is charged;
the electric quantity calculating module (302) is used for calculating and obtaining the real-time electric quantity of each single battery according to the timing information in the database and the acquired voltage and current of each single battery;
the battery discharging module (304) is used for calculating the average value of the real-time electric quantity of the plurality of single batteries according to the real-time electric quantity of each single battery; comparing the real-time electric quantity of each single battery to obtain a real-time electric quantity value with the minimum value; calculating the average value of the real-time electric quantity and the electric quantity value with the minimum value to obtain standard electric quantity; and respectively judging whether the current electric quantity of each single battery is greater than the standard electric quantity, if so, executing discharging operation on the single batteries until the electric quantity of the single batteries reaches the standard electric quantity.
7. A computer device comprising a memory and a processor, the memory having stored thereon a computer program that can be loaded by the processor and that executes the method according to any of claims 1 to 5.
8. A computer-readable storage medium, in which a computer program is stored which can be loaded by a processor and which executes the method of any one of claims 1 to 5.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102053228A (en) * 2010-11-26 2011-05-11 东莞洲亮通讯科技有限公司 Battery electric quantity management system and monitoring method
CN103308864A (en) * 2013-07-09 2013-09-18 中国人民解放军国防科学技术大学 Method for estimating secondary cell SOH value and testing residual service life
CN108544925A (en) * 2018-04-02 2018-09-18 北京理工大学 Battery management system
CN109217399A (en) * 2017-07-05 2019-01-15 周锡卫 A kind of two-way active equalization battery management system and control method based on multiple-unit sorting
CN110531277A (en) * 2019-08-18 2019-12-03 浙江万马新能源有限公司 A kind of battery management system of band estimation electric automobile power battery service life function
CN111077806A (en) * 2019-11-25 2020-04-28 广西科技师范学院 Electric quantity management system for mobile robot

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8115446B2 (en) * 2008-11-12 2012-02-14 Ford Global Technologies, Llc Automotive vehicle power system
CN103606998A (en) * 2013-11-04 2014-02-26 江苏嘉钰新能源技术有限公司 Cell voltage equalizing control method using dynamic reference

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102053228A (en) * 2010-11-26 2011-05-11 东莞洲亮通讯科技有限公司 Battery electric quantity management system and monitoring method
CN103308864A (en) * 2013-07-09 2013-09-18 中国人民解放军国防科学技术大学 Method for estimating secondary cell SOH value and testing residual service life
CN109217399A (en) * 2017-07-05 2019-01-15 周锡卫 A kind of two-way active equalization battery management system and control method based on multiple-unit sorting
CN108544925A (en) * 2018-04-02 2018-09-18 北京理工大学 Battery management system
CN110531277A (en) * 2019-08-18 2019-12-03 浙江万马新能源有限公司 A kind of battery management system of band estimation electric automobile power battery service life function
CN111077806A (en) * 2019-11-25 2020-04-28 广西科技师范学院 Electric quantity management system for mobile robot

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