CN117368763A - Lithium battery management method, device, equipment and storage medium based on SOC algorithm - Google Patents
Lithium battery management method, device, equipment and storage medium based on SOC algorithm Download PDFInfo
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 208
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 204
- 238000007726 management method Methods 0.000 title claims abstract description 62
- 238000004422 calculation algorithm Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 6
- 230000010354 integration Effects 0.000 claims description 6
- 238000012163 sequencing technique Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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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]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
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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]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The application relates to a lithium battery management method, a device, equipment and a storage medium based on an SOC algorithm, which are applied to the field of data processing, wherein the method comprises the following steps: obtaining a main loop current of a lithium battery; calculating the residual capacity of the lithium battery by utilizing an ampere-hour integral algorithm and combining the main loop current with time; acquiring a plurality of historical discharge efficiencies from a preset historical database; calculating standard discharge efficiency according to a plurality of historical discharge efficiencies; and calculating the residual service life of the lithium battery according to the standard discharge efficiency and the residual electric quantity. The technical effect that this application had is: and the accuracy of the residual service life estimation of the lithium battery is improved.
Description
Technical Field
The present disclosure relates to the field of data processing technologies, and in particular, to a lithium battery management method, device, equipment, and storage medium based on an SOC algorithm.
Background
Lithium batteries are a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a positive/negative electrode material. The chemical characteristics of lithium metal are very active, so that the processing, storage and use of lithium metal have very high requirements on environment. With the development of science and technology, lithium batteries have become the mainstream. Lithium batteries can be broadly divided into two categories: lithium metal batteries and lithium ion batteries. Lithium ion batteries do not contain lithium in the metallic state and are rechargeable.
SOC estimation is an important function of a battery energy storage lithium battery management system, and SOC refers to a state of charge, also called a remaining capacity, used to reflect a remaining capacity of a battery, and is defined numerically as a ratio of the remaining capacity to the battery capacity. The SOC estimation has very important significance in accurately reflecting the battery state, realizing man-machine interaction with a user, prolonging the service life of the battery and the like.
When the lithium battery is applied to an automobile, a mobile phone and other devices, the data of the remaining use time of the lithium battery is important for users of the products, and the users need to use the data of the remaining use time to schedule the next charging time of the lithium battery. Although the user can know the remaining capacity of the lithium battery, along with the increase of the using time of the lithium battery, the usable time corresponding to the capacity of the lithium battery is also changed, so that the user can not accurately sense the usable time of the capacities only by knowing the remaining capacity of the lithium battery, further can not reasonably arrange the next charging time, and how to improve the accuracy of the estimation of the remaining use time of the lithium battery is one of the important concerns in the current lithium battery management research field.
Disclosure of Invention
In order to improve accuracy of residual service time estimation of a lithium battery, the lithium battery management method, device, equipment and storage medium based on the SOC algorithm are provided.
In a first aspect, the present application provides a lithium battery management method based on an SOC algorithm, which adopts the following technical scheme: the method comprises the following steps: obtaining a main loop current of a lithium battery;
calculating the residual capacity of the lithium battery by utilizing an ampere-hour integral algorithm and combining the main loop current with time;
acquiring a plurality of historical discharge efficiencies from a preset historical database;
calculating standard discharge efficiency according to a plurality of historical discharge efficiencies;
and calculating the residual service life of the lithium battery according to the standard discharge efficiency and the residual electric quantity.
Through the technical scheme, the lithium battery management system obtains the residual electric quantity of the lithium battery by combining the ampere-hour integral algorithm with the main loop current of the lithium battery, and then the lithium battery management system predicts the duration of the residual electric quantity in the lithium battery according to the discharge efficiency of the lithium battery, so that a user can know the service condition of the electric quantity of the lithium battery more clearly and reasonably arrange the next charging time of the lithium battery.
In a specific embodiment, after the calculating the remaining power of the lithium battery by using the ampere-hour integration algorithm in combination with the main loop current over time, the method further includes:
comparing the residual electric quantity with a preset residual electric quantity threshold value;
and if the residual electric quantity is smaller than the residual electric quantity threshold value, generating a charging warning prompt.
Through the technical scheme, the lithium battery management system monitors the residual electric quantity of the lithium battery to prompt a user to charge the lithium battery so as to reduce the possibility that the equipment cannot work due to insufficient electric quantity of the battery.
In a specific embodiment, the generating of the historical discharge efficiency specifically includes:
collecting the residual electric quantity of the lithium battery according to a preset collection frequency;
sequencing the residual electric quantity according to the acquisition time to obtain a residual electric quantity sequence;
traversing the residual electric quantity sequence, and sequentially acquiring two adjacent residual electric quantities;
respectively calculating the electric quantity difference between the two obtained residual electric quantities and the time interval between the acquisition times corresponding to the residual electric quantities;
recording the ratio of the electric quantity difference value to the time interval as historical discharge efficiency;
and storing the historical discharge efficiency into a preset historical database.
Through the technical scheme, the lithium battery management system counts the discharge electric quantity of the lithium battery in a period of time, and further evaluates the discharge efficiency of the lithium battery, so that the accuracy of the subsequent evaluation of the residual use time corresponding to the current residual electric quantity of the lithium battery is improved.
In a specific embodiment, after said recording the ratio of said difference in charge to said time interval as a historical discharge efficiency, further comprising:
judging whether the historical discharge efficiency is in a preset standard discharge range or not;
if the lithium battery is not located, determining temperature data of the current environment of the lithium battery, and recording the temperature data as first temperature data;
judging whether the lithium battery is currently in a high-cold environment or not according to the first temperature data;
and if so, attaching a special mark to the historical discharge efficiency.
Through the technical scheme, since the actual service time of the electric quantity of the lithium battery can be influenced by the environment where the lithium battery is located, the lithium battery management system can also consider the actual situation of the current environment where the lithium battery is located when evaluating the discharge efficiency of the lithium battery, and the estimated discharge efficiency when some lithium batteries are located in special environments is marked, so that the subsequent lithium battery management system can calculate the residual service time of the electric quantity of the lithium battery based on the proper discharge efficiency data, and further the accuracy of the subsequent residual service time evaluation corresponding to the current residual electric quantity of the lithium battery is improved.
In a specific embodiment, the obtaining a plurality of historical discharge efficiencies from a preset historical database specifically includes:
determining temperature data of the environment where the lithium battery is located at the moment, and recording the temperature data as second temperature data;
judging whether the lithium battery is in a high-cold environment at the moment according to the second temperature data;
if so, acquiring a plurality of historical discharge efficiencies with special identifications.
Through the technical scheme, when the running environment of the lithium battery is a special environment, the lithium battery management system adopts the history discharge efficiency with the special mark when the residual use time of the electric quantity of the lithium battery is estimated, so that the influence of environmental factors on the use time of the lithium battery is fully considered, and the estimated residual use time is more consistent with the current actual running condition of the lithium battery.
In a specific embodiment, said calculating a standard discharge efficiency from a number of said historical discharge efficiencies specifically comprises:
calculating the average value of a plurality of historical discharge efficiencies;
the average value was recorded as a standard discharge efficiency.
According to the technical scheme, the lithium battery management system utilizes the average value of the historical discharge efficiencies to participate in calculation of the remaining use time of the lithium battery, so that the standard discharge efficiency which participates in calculation of the remaining use time of the lithium battery can reflect the discharge state of the lithium battery as much as possible.
In a specific embodiment, after calculating the remaining service time of the lithium battery according to the standard discharge efficiency and the remaining power, the method further includes:
comparing the residual using time with a preset residual time threshold value;
and if the residual using time is smaller than the residual time threshold value, generating a charging prompt signal.
Through the technical scheme, once the residual use duration of the lithium battery is shorter and is lower than the set residual time threshold, the lithium battery management system can generate a prompt signal to remind a user of charging as soon as possible, and the damage of the lithium battery is further reduced.
In a second aspect, the present application provides a lithium battery management device based on an SOC algorithm, which adopts the following technical scheme: the device comprises:
the main loop current acquisition module is used for acquiring the main loop current of the lithium battery;
the residual electric quantity calculation module is used for calculating the residual electric quantity of the lithium battery by combining the ampere-hour integral algorithm with the main loop current and the time;
the historical discharge efficiency acquisition module is used for acquiring a plurality of historical discharge efficiencies from a preset historical database;
the standard discharge efficiency determining module is used for calculating standard discharge efficiency according to a plurality of historical discharge efficiencies;
and the residual use time estimation module is used for calculating the residual use time of the lithium battery according to the standard discharge efficiency and the residual electric quantity.
In a third aspect, the present application provides a computer device, which adopts the following technical scheme: comprising a memory and a processor, the memory having stored thereon a computer program capable of being loaded by the processor and executing any of the SOC-algorithm based lithium battery management methods described above.
In a fourth aspect, the present application provides a computer readable storage medium, which adopts the following technical solutions: a computer program capable of being loaded by a processor and executing any one of the above-described SOC algorithm-based lithium battery management methods is stored.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the lithium battery management system utilizes an ampere-hour integration algorithm to combine the main loop current of the lithium battery to obtain the residual electric quantity of the lithium battery, and then the lithium battery management system predicts the duration of the discharge state of the lithium battery according to the discharge efficiency of the lithium battery, so that a user can know the service condition of the electric quantity of the lithium battery more clearly, and the next charging time of the lithium battery is reasonably arranged;
2. because the actual service time of the lithium battery electric quantity can be influenced by the environment where the lithium battery is located, when the lithium battery management system evaluates the discharge efficiency of the lithium battery, the actual situation of the current environment where the lithium battery is located can be considered, and the discharge efficiency evaluated when some lithium batteries are located in special environments is marked, so that the subsequent lithium battery management system can calculate the residual service time of the lithium battery electric quantity based on proper discharge efficiency data, and further the accuracy of the subsequent residual service time evaluation corresponding to the current residual electric quantity of the lithium battery is improved.
Drawings
Fig. 1 is a flowchart of a lithium battery management method based on an SOC algorithm in an embodiment of the present application.
Fig. 2 is a block diagram of a lithium battery management device based on an SOC algorithm in an embodiment of the present application.
Reference numerals: 301. a main loop current acquisition module; 302. a residual electric quantity calculation module; 303. a history discharge efficiency acquisition module; 304. a standard discharge efficiency determination module; 305. the remaining usage time estimation module.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-2.
The embodiment of the application discloses a lithium battery management method based on an SOC algorithm. The method is applied to the lithium battery management system, and the program codes corresponding to the method are prestored in a control center of the lithium battery management system.
As shown in fig. 1, the method comprises the steps of:
s10, obtaining the main loop current of the lithium battery.
Specifically, the lithium battery management system acquires voltage data of the lithium battery at the moment, and then calculates main loop current of the lithium battery by using a current calculation formula according to the internal resistance of the lithium battery.
And S20, calculating the residual electric quantity of the lithium battery by utilizing an ampere-hour integral algorithm and combining the main loop current with time.
Specifically, the formula of the ampere-hour integration algorithm is:
wherein,is the main loop current of the lithium battery,for the rated capacity of a lithium battery,in practical processes, the charge and discharge efficiency of lithium batteries is usually set to a fixed value, for example, 1 or 0.999,an initial electrical quantity value representing the state of charge of the lithium battery,refers to the time spent in the current discharging process of the lithium battery.
In this application, the remaining capacity of a lithium battery is expressed by a relative value, and the calculated remaining capacity of the battery is a ratio with respect to the total battery capacity of the lithium battery, in other words, the essence of the remaining capacity is a ratio.
After the current residual capacity of the lithium battery is calculated, the lithium battery management system compares the current residual capacity with a preset residual capacity threshold, if the current residual capacity of the lithium battery is lower than the residual capacity threshold, the fact that the available electric quantity of the lithium battery is extremely small at the moment is indicated, the lithium battery management system needs to be charged immediately, a charging warning prompt is generated immediately by the lithium battery management system, a user is reminded of charging the lithium battery in a short time, and the equipment cannot work normally due to the fact that the electric quantity of the battery is insufficient.
S30, acquiring a plurality of historical discharge efficiencies from a preset historical database.
The preset historical database stores a large amount of historical discharge efficiency, the historical discharge efficiency is used for measuring the capability of the lithium battery for discharging charges in unit time, the lithium battery management system obtains the latest historical discharge efficiency from the historical discharge efficiency, for example, the lithium battery management system only obtains the historical discharge efficiency of the last 30 days in the historical database, and the longer the service time of the lithium battery is, the charge quantity which can be stored is reduced along with the charging and discharging performance of the lithium battery, namely the discharge efficiency of the lithium battery is accelerated.
In order to ensure that the historical discharge efficiency stored in the historical database matches the current discharge performance of the lithium battery, the lithium battery management system may periodically eliminate some of the historical discharge efficiency in the historical database, e.g., the lithium battery management system only stores the historical discharge efficiency of the lithium battery for the last two years. In the present application, the generation process of the history discharge efficiency is specifically as follows: the lithium battery management system firstly creates a temporary database for temporarily storing operation parameter data related to the lithium battery, then collects the residual capacity of the lithium battery according to a preset collection frequency, for example, determines the current residual capacity of the lithium battery every 10 minutes, stores the latest residual capacity obtained into the temporary database, sorts the residual capacities in the temporary database according to the sequence of corresponding collection time to obtain a residual capacity sequence, each residual capacity in the residual capacity sequence corresponds to a serial number, traverses the residual capacity sequence in the temporary database to sequentially obtain two adjacent residual capacities, then calculates the difference between the two obtained residual capacities, marks the difference as a capacity difference, calculates the difference between the collection time corresponding to the residual capacities and marks the difference as a time interval, because the lithium battery management system determines the residual capacity of the lithium battery according to a certain collection frequency, the time interval between two adjacent residual capacities is constant, the lithium battery management system can not calculate any more after calculating the time interval, then takes the ratio of the calculated electric quantity difference value to the time interval as the historical discharge efficiency, stores the historical discharge efficiency into a preset historical database, meanwhile, eliminates the residual capacity with smaller serial number value in the two adjacent residual capacities corresponding to the historical discharge efficiency from the temporary database, updates the serial number value of the residual capacity, generally, once the two residual capacities exist in the temporary database, the lithium battery management system can start to calculate the historical discharge efficiency corresponding to the two residual capacities, and after the historical discharge efficiency calculation is completed, the lithium battery management system can reject the residual electric quantity with smaller serial number value, at the moment, only one residual electric quantity exists in the temporary database, and the lithium battery management system waits for the next residual electric quantity, and the steps are repeated continuously.
Considering that the charging and discharging states of the lithium battery are easily changed due to the influence of the environment, the following steps may be further performed after the ratio of the difference of the electric quantity to the time interval is recorded as the historical discharging efficiency:
after the lithium battery management system obtains a historical discharge efficiency, the historical discharge efficiency is compared with an endpoint value of a preset standard discharge range, whether the historical discharge efficiency is located in the preset standard discharge range is judged, if the historical discharge efficiency is located outside the preset standard discharge range, the lithium battery management system can acquire temperature data for determining the current environment of the lithium battery, and records the temperature data as first temperature data, because the computer is fast in operation related to digital operation, even if the actual position of the lithium battery is continuously changed, the change amount of the actual position of the lithium battery is small in the period of time for calculating the historical discharge efficiency according to the acquired residual electric quantity, and then the temperature condition of the environment of the lithium battery is not changed, if the first temperature data is smaller than the preset temperature threshold, the lithium battery management system can judge that the current environment of the lithium battery is in the high-cold environment, namely, if the current environment of the lithium battery is in the high-cold environment is distinguished from the ordinary environment, the lithium battery management system is judged to be in the high-cold environment, and if the current environment is in the high-cold environment is judged, and the current environment is suitable for the lithium battery is distinguished from the ordinary environment.
In order to make the residual service time estimated by the lithium battery management system according to the current residual electric quantity of the lithium battery more accurate, a plurality of historical discharge efficiencies are obtained from a preset historical database, and the method specifically comprises the following steps:
the method comprises the steps of monitoring the surrounding environment by using a temperature sensor, determining the temperature data of the environment where the lithium battery is located, recording the temperature data as second temperature data, comparing the acquired second temperature data with a temperature threshold value, if the second temperature data is smaller than the temperature threshold value, indicating that the lithium battery is in a high-cold environment at the moment, acquiring the history discharge efficiency with a special mark from a history database by a lithium battery management system, wherein the history discharge efficiency acquired by the lithium battery management system is the history discharge efficiency of the lithium battery in the last 30 days, but the number of the history discharge efficiencies marked with the special mark in the history discharge efficiency in the last 30 days is possibly small, counting the number of the acquired history discharge efficiencies after the history discharge efficiency with the special mark is acquired from the history database, comparing the number of the acquired history discharge efficiencies with the discharge efficiency number threshold value, and acquiring the history discharge efficiency with the special mark in the last 60 days by the lithium battery management system when the number of the history discharge efficiencies does not reach the discharge efficiency number threshold value.
S40, calculating standard discharge efficiency according to the historical discharge efficiencies.
Specifically, the lithium battery management system calculates an average value corresponding to the obtained plurality of historical discharge efficiencies, and marks the average value as a standard discharge efficiency, and since the value of the historical discharge efficiency of the lithium battery is difficult to be constant, the average value is used as the standard discharge efficiency for estimating the remaining service time of the lithium battery, so that the average value can be attached to the daily discharge state of the lithium battery as much as possible.
And S50, calculating the residual service life of the lithium battery according to the standard discharge efficiency and the residual electric quantity.
Specifically, the standard discharge efficiency refers to average decreasing magnitude of the remaining power of the lithium battery in a predetermined time interval, and the lithium battery management system divides the current remaining power of the lithium battery by the standard discharge efficiency, and multiplies the obtained value by the time interval to obtain a remaining usage time corresponding to the current remaining power of the lithium battery, where the time interval is a time interval corresponding to a frequency determined by the remaining power of the lithium battery.
After the lithium battery management system predicts the residual service time of the lithium battery, the lithium battery management system compares the obtained residual service time with a preset residual time threshold value, and once the residual service time of the lithium battery is smaller than the residual time threshold value, the lithium battery management system immediately generates a charging prompt signal to remind a user of quick charging.
Fig. 1 is a flowchart of a lithium battery management method based on an SOC algorithm in an embodiment. It should be understood that, although the steps in the flowchart of fig. 1 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows; the steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders; and at least some of the steps in fig. 1 may include a plurality of sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor does the order in which the sub-steps or stages are performed necessarily occur in sequence, but may be performed alternately or alternately with at least some of the other steps or sub-steps of other steps.
Based on the method, the embodiment of the application also discloses a lithium battery management device based on the SOC algorithm.
As shown in fig. 2, the apparatus comprises the following modules:
the main loop current acquisition module 301 is configured to acquire a main loop current of the lithium battery;
the remaining power calculation module 302 is configured to calculate the remaining power of the lithium battery according to time by combining the ampere-hour integration algorithm with the main loop current;
a historical discharge efficiency obtaining module 303, configured to obtain a plurality of historical discharge efficiencies from a preset historical database;
a standard discharge efficiency determining module 304, configured to calculate a standard discharge efficiency according to a plurality of historical discharge efficiencies;
the remaining usage time estimation module 305 is configured to calculate a remaining usage time of the lithium battery according to the standard discharge efficiency and the remaining power.
In one embodiment, the remaining power calculation module 302 is further configured to compare the remaining power with a preset remaining power threshold;
and if the residual electric quantity is smaller than the residual electric quantity threshold value, generating a charging warning prompt.
In one embodiment, the historical discharge efficiency obtaining module 303 is further configured to collect a remaining power of the lithium battery according to a preset collection frequency;
sequencing the residual electric quantity according to the acquisition time to obtain a residual electric quantity sequence;
traversing the residual electric quantity sequence, and sequentially acquiring two adjacent residual electric quantities;
respectively calculating the electric quantity difference between the two obtained residual electric quantities and the time interval between the acquisition times corresponding to the residual electric quantities;
recording the ratio of the electric quantity difference value to the time interval as the historical discharge efficiency;
and storing the historical discharge efficiency into a preset historical database.
In one embodiment, the historical discharge efficiency obtaining module 303 is further configured to determine whether the historical discharge efficiency is within a preset standard discharge range;
if the lithium battery is not located, determining temperature data of the current environment of the lithium battery, and recording the temperature data as first temperature data;
judging whether the lithium battery is currently in a high-cold environment or not according to the first temperature data;
if so, the history discharge efficiency is attached with a special mark.
In one embodiment, the historical discharge efficiency obtaining module 303 is further configured to determine temperature data of an environment where the lithium battery is located at the time, and record the temperature data as second temperature data;
judging whether the lithium battery is in a high-cold environment at the moment according to the second temperature data;
if so, acquiring a plurality of historical discharge efficiencies with special identifications.
In one embodiment, the standard discharge efficiency determination module 304 is further configured to calculate an average value of a plurality of historical discharge efficiencies;
the average value was recorded as the standard discharge efficiency.
In one embodiment, the remaining usage time estimation module 305 is further configured to compare the remaining usage time with a preset remaining time threshold;
and if the remaining use time is smaller than the remaining time threshold value, generating a charging prompt signal.
The embodiment of the application also discloses a computer device.
Specifically, the computer device includes a memory and a processor, and the memory stores a computer program that can be loaded by the processor and execute the lithium battery management method based on the SOC algorithm.
The embodiment of the application also discloses a computer readable storage medium.
Specifically, the computer-readable storage medium stores a computer program capable of being loaded by a processor and executing the lithium battery management method based on the SOC algorithm as described above, for example, the computer-readable storage medium includes: a U-disk, a removable hard disk, a Read-only memory (ROM), a random access memory (RandomAccessMemory, RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Claims (10)
1. A lithium battery management method based on an SOC algorithm, the method comprising:
obtaining a main loop current of a lithium battery;
calculating the residual capacity of the lithium battery by utilizing an ampere-hour integral algorithm and combining the main loop current with time;
acquiring a plurality of historical discharge efficiencies from a preset historical database;
calculating standard discharge efficiency according to a plurality of historical discharge efficiencies;
and calculating the residual service life of the lithium battery according to the standard discharge efficiency and the residual electric quantity.
2. The method of claim 1, further comprising, after said calculating a remaining charge of the lithium battery over time using an ampere-hour integration algorithm in combination with said main loop current:
comparing the residual electric quantity with a preset residual electric quantity threshold value;
and if the residual electric quantity is smaller than the residual electric quantity threshold value, generating a charging warning prompt.
3. The method according to claim 1, wherein the generation of the historical discharge efficiency comprises:
collecting the residual electric quantity of the lithium battery according to a preset collection frequency;
sequencing the residual electric quantity according to the acquisition time to obtain a residual electric quantity sequence;
traversing the residual electric quantity sequence, and sequentially acquiring two adjacent residual electric quantities;
respectively calculating the electric quantity difference between the two obtained residual electric quantities and the time interval between the acquisition times corresponding to the residual electric quantities;
recording the ratio of the electric quantity difference value to the time interval as historical discharge efficiency;
and storing the historical discharge efficiency into a preset historical database.
4. A method according to claim 3, further comprising, after said recording the ratio of said difference in charge to said time interval as a historical discharge efficiency:
judging whether the historical discharge efficiency is in a preset standard discharge range or not;
if the lithium battery is not located, determining temperature data of the current environment of the lithium battery, and recording the temperature data as first temperature data;
judging whether the lithium battery is currently in a high-cold environment or not according to the first temperature data;
and if so, attaching a special mark to the historical discharge efficiency.
5. The method according to claim 1, wherein the obtaining a plurality of historical discharge efficiencies from a preset historical database specifically includes:
determining temperature data of the environment where the lithium battery is located at the moment, and recording the temperature data as second temperature data;
judging whether the lithium battery is in a high-cold environment at the moment according to the second temperature data;
if so, acquiring a plurality of historical discharge efficiencies with special identifications.
6. The method according to claim 1, wherein said calculating a standard discharge efficiency from a number of said historical discharge efficiencies, in particular comprises:
calculating the average value of a plurality of historical discharge efficiencies;
the average value was recorded as a standard discharge efficiency.
7. The method according to claim 1, further comprising, after said calculating a remaining usage time of the lithium battery from the standard discharge efficiency and the remaining power, the steps of:
comparing the residual using time with a preset residual time threshold value;
and if the residual using time is smaller than the residual time threshold value, generating a charging prompt signal.
8. A lithium battery management device based on an SOC algorithm, the device comprising:
the main loop current acquisition module (301) is used for acquiring the main loop current of the lithium battery;
the residual electric quantity calculation module (302) is used for calculating the residual electric quantity of the lithium battery by utilizing an ampere-hour integration algorithm and combining the main loop current with time;
a historical discharge efficiency obtaining module (303) for obtaining a plurality of historical discharge efficiencies from a preset historical database;
a standard discharge efficiency determination module (304) for calculating a standard discharge efficiency from a number of said historical discharge efficiencies;
and the residual use time estimation module (305) is used for calculating the residual use time of the lithium battery according to the standard discharge efficiency and the residual electric quantity.
9. A computer device comprising a memory and a processor, the memory having stored thereon a computer program capable of being loaded by the processor and performing the method according to any of claims 1 to 7.
10. A computer readable storage medium, characterized in that a computer program is stored which can be loaded by a processor and which performs the method according to any one of claims 1 to 7.
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