CN110492190B - Battery management method, system and computer readable storage medium - Google Patents
Battery management method, system and computer readable storage medium Download PDFInfo
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- CN110492190B CN110492190B CN201910845760.5A CN201910845760A CN110492190B CN 110492190 B CN110492190 B CN 110492190B CN 201910845760 A CN201910845760 A CN 201910845760A CN 110492190 B CN110492190 B CN 110492190B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a battery management method, which comprises the following steps: acquiring current environment temperature and performance parameters of a battery, wherein the performance parameters of the battery comprise at least one of battery capacity and charging times; determining a charging strategy of the battery according to the current environment temperature and the performance parameters of the battery; and charging the battery according to the charging strategy of the battery. The invention also discloses a battery management system and a computer readable storage medium. The technical scheme of the invention can improve the utilization rate of the battery and prolong the service life of the battery.
Description
Technical Field
The present invention relates to the field of battery management technologies, and in particular, to a battery management method, a battery management system, and a computer-readable storage medium.
Background
The battery is widely used as an energy supplier in electric products, such as various electric vehicles driven by electricity. Generally, a battery management system is adopted to effectively manage and maintain a battery, for example, the battery is subjected to charging management, the battery is generally charged by adjusting charging voltage and charging current in the existing battery charging management process, but due to different environmental temperatures in the charging process, the charging process of the battery is often unreasonable, the utilization rate of the battery is low, and further the service life of the battery is influenced.
Disclosure of Invention
The invention mainly aims to provide a battery management method, a battery management system and a computer readable storage medium, aiming at improving the utilization rate of a battery and prolonging the service life of the battery.
In order to achieve the above object, the present invention provides a battery management method, including the steps of:
acquiring current environment temperature and performance parameters of a battery, wherein the performance parameters of the battery comprise at least one of battery capacity and charging times;
determining a charging strategy of the battery according to the current environment temperature and the performance parameters of the battery;
and charging the battery according to the charging strategy of the battery.
In an embodiment, when the performance parameter of the battery is a battery capacity, the step of determining the charging strategy of the battery according to the current ambient temperature and the performance parameter of the battery includes:
when the current environment temperature is lower than a preset temperature threshold, the charging strategy of the battery is a low-temperature charging mode, and a first charging voltage and a first charging current of the battery are determined according to the capacity of the battery in the low-temperature charging mode.
In one embodiment, the step of charging the battery according to the charging strategy of the battery comprises:
charging the battery at a constant current, wherein the constant current value is a first charging current of the battery;
after the charging is carried out for the preset time, converting the constant-current charging into constant-voltage current-limiting charging, wherein the constant voltage value is the first charging voltage of the battery;
when the battery charging reaches a preset threshold value of rated capacity, the constant voltage current-limiting charging is converted into constant current charging, and the constant current value is a first charging current of the battery.
In an embodiment, when the performance parameter is a battery capacity, the step of determining a charging strategy of the battery according to the current ambient temperature and the performance parameter of the battery includes:
when the current environment temperature is higher than the preset temperature threshold, the charging strategy of the battery is a high-temperature charging mode, and a second charging voltage and a second charging current of the battery are determined according to the capacity of the battery in the high-temperature charging mode.
In one embodiment, the step of charging the battery according to the charging strategy of the battery comprises:
performing constant-voltage current-limiting charging on the battery, wherein the constant voltage value is a second charging voltage of the battery;
and when the battery charging reaches a preset threshold value of rated capacity, converting the constant-voltage current-limiting charging into constant-current charging, wherein the constant-current value is a second charging current of the battery.
In an embodiment, when the performance parameter of the battery includes a battery capacity and a charging number, the step of determining the charging policy of the battery according to the current ambient temperature and the performance parameter of the battery includes:
when the current environment temperature is lower than a preset temperature threshold, determining that the charging strategy of the battery is a low-temperature charging mode, and judging whether the charging frequency of the battery is greater than or equal to the preset frequency threshold;
if so, determining a third charging voltage and a third charging current of the battery according to the battery capacity;
and if not, determining a third charging voltage and a third charging current of the battery according to the battery capacity and the charging times of the battery.
In an embodiment, when the performance parameter of the battery includes a battery capacity and a charging number, the step of determining the charging policy of the battery according to the current ambient temperature and the performance parameter of the battery includes:
when the current environment temperature is higher than a preset temperature threshold, determining that the charging strategy of the battery is a high-temperature charging mode, and judging whether the charging times of the battery are greater than or equal to a preset time threshold;
if yes, determining a fourth charging voltage and a fourth charging current of the battery according to the battery capacity;
and if not, determining a fourth charging voltage and a fourth charging current of the battery according to the battery capacity and the charging times of the battery.
In one embodiment, the battery capacity is obtained by the following steps:
acquiring the charging times of the battery, the charging time corresponding to each charging and the discharging time of the battery;
and determining the battery capacity according to the charging times of the battery, the charging time corresponding to each charging and the discharging time of the battery.
To achieve the above object, the present invention further provides a battery management system, which includes a processor, a memory, and a battery management program stored on the memory and operable on the processor, wherein the battery management program, when executed by the processor, implements the steps of the method as described above.
To achieve the above object, the present invention also provides a computer-readable storage medium storing a battery management program, which when executed by a processor implements the steps of the battery management method as described above.
The battery management method, the system and the computer readable storage medium provided by the invention can be used for acquiring the current environment temperature and the performance parameters of the battery, wherein the performance parameters of the battery comprise at least one of the battery capacity and the charging times, determining the charging strategy of the battery according to the current environment temperature and the performance parameters of the battery, and further reasonably charging the battery according to the charging strategy of the battery, so that the battery can be charged by selecting different charging strategies according to the difference of the current environment and the performance parameters of the battery, the problem of unreasonable battery charging caused by the influence of the environment temperature in the battery charging process is effectively avoided, the utilization rate of the battery is improved, and the service life of the battery is prolonged.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of a battery management system according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a battery management method according to a first embodiment of the present invention;
FIG. 3 is a flow chart illustrating a battery management method according to a second embodiment of the present invention;
FIG. 4 is a flowchart illustrating a battery management method according to a third embodiment of the present invention;
FIG. 5 is a detailed flowchart of step S20 in FIG. 2;
fig. 6 is a schematic flow chart of another refinement of step S20 in fig. 2.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: acquiring current environment temperature and performance parameters of a battery, wherein the performance parameters of the battery comprise at least one of battery capacity and charging times; determining a charging strategy of the battery according to the current environment temperature and the performance parameters of the battery; and charging the battery according to the charging strategy of the battery.
The battery is charged by selecting different charging strategies according to different current environments and combining performance parameters of the battery, so that the problem of unreasonable battery charging caused by the influence of environmental temperature in the battery charging process is effectively solved, the utilization rate of the battery is improved, and the service life of the battery is prolonged.
As one implementation, the system may be as shown in fig. 1.
The embodiment scheme of the invention relates to a battery management system, which comprises: a processor 101, e.g. a CPU, a memory 102, a communication bus 103. Wherein a communication bus 103 is used to enable the connection communication between these organizations.
The memory 102 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). As shown in fig. 1, a battery management program may be included in a memory 102, which is a kind of computer-readable storage medium; and the processor 101 may be configured to invoke the battery management program stored in the memory 102 and perform the following operations:
acquiring current environment temperature and performance parameters of a battery, wherein the performance parameters of the battery comprise at least one of battery capacity and charging times;
determining a charging strategy of the battery according to the current environment temperature and the performance parameters of the battery;
and charging the battery according to the charging strategy of the battery.
In one embodiment, the processor 101 may be configured to invoke a battery management program stored in the memory 102 and perform the following operations:
when the current environment temperature is lower than a preset temperature threshold, the charging strategy of the battery is a low-temperature charging mode, and a first charging voltage and a first charging current of the battery are determined according to the capacity of the battery in the low-temperature charging mode.
In one embodiment, the processor 101 may be configured to invoke a battery management program stored in the memory 102 and perform the following operations:
charging the battery at a constant current, wherein the constant current value is a first charging current of the battery;
after the charging is carried out for the preset time, converting the constant-current charging into constant-voltage current-limiting charging, wherein the constant voltage value is the first charging voltage of the battery;
when the battery charging reaches a preset threshold value of rated capacity, the constant voltage current-limiting charging is converted into constant current charging, and the constant current value is a first charging current of the battery.
In one embodiment, the processor 101 may be configured to invoke a battery management program stored in the memory 102 and perform the following operations:
when the current environment temperature is higher than the preset temperature threshold, the charging strategy of the battery is a high-temperature charging mode, and a second charging voltage and a second charging current of the battery are determined according to the capacity of the battery in the high-temperature charging mode.
In one embodiment, the processor 101 may be configured to invoke a battery management program stored in the memory 102 and perform the following operations:
performing constant-voltage current-limiting charging on the battery, wherein the constant voltage value is a second charging voltage of the battery;
and when the battery charging reaches a preset threshold value of rated capacity, converting the constant-voltage current-limiting charging into constant-current charging, wherein the constant-current value is a second charging current of the battery.
In one embodiment, the processor 101 may be configured to invoke a battery management program stored in the memory 102 and perform the following operations:
when the current environment temperature is lower than a preset temperature threshold, determining that the charging strategy of the battery is a low-temperature charging mode, and judging whether the charging frequency of the battery is greater than or equal to the preset frequency threshold;
if so, determining a third charging voltage and a third charging current of the battery according to the battery capacity;
and if not, determining a third charging voltage and a third charging current of the battery according to the battery capacity and the charging times of the battery.
In one embodiment, the processor 101 may be configured to invoke a battery management program stored in the memory 102 and perform the following operations:
when the current environment temperature is higher than a preset temperature threshold, determining that the charging strategy of the battery is a high-temperature charging mode, and judging whether the charging times of the battery are greater than or equal to a preset time threshold;
if yes, determining a fourth charging voltage and a fourth charging current of the battery according to the battery capacity;
and if not, determining a fourth charging voltage and a fourth charging current of the battery according to the battery capacity and the charging times of the battery.
In one embodiment, the processor 101 may be configured to invoke a battery management program stored in the memory 102 and perform the following operations:
acquiring the charging times of the battery, the charging time corresponding to each charging and the discharging time of the battery;
and determining the battery capacity according to the charging times of the battery, the charging time corresponding to each charging and the discharging time of the battery.
According to the scheme, the current environment temperature and the performance parameters of the battery are obtained, wherein the performance parameters of the battery comprise at least one of the battery capacity and the charging times, the charging strategy of the battery is determined according to the current environment temperature and the performance parameters of the battery, and then the battery is reasonably charged according to the charging strategy of the battery, so that different charging strategies can be selected to charge the battery according to the difference of the current environment and the performance parameters of the battery, the problem that the battery is unreasonably charged due to the influence of the environment temperature in the charging process of the battery is effectively avoided, the utilization rate of the battery is improved, and the service life of the battery is prolonged.
Based on the hardware architecture of the battery management system, the embodiment of the method of the invention is provided.
Referring to fig. 2, fig. 2 is a first embodiment of a battery management method of the present invention, which includes the steps of:
step S10, obtaining the current environmental temperature and performance parameters of the battery, wherein the performance parameters of the battery include at least one of battery capacity, charging times and discharging depth.
The execution main body is a battery management system, the number of the batteries may be one or more, and the battery management system is configured to detect and store the current ambient temperature and the performance parameters of the batteries, and specifically, when the batteries are charged, the battery management system monitors and stores the current ambient temperature and the performance parameters of the batteries. The current ambient temperature is obtained by monitoring through a temperature sensor, and can be a plurality of ambient temperature values within a period of time (such as 24 hours), and then the average value of the plurality of ambient temperature values is taken as the current ambient temperature, so that the current ambient temperature obtained by monitoring can be ensured to be more accurate. The performance parameter of the battery includes at least one of a battery capacity and a charging number, where the battery capacity may represent an electric quantity that can be released after the battery is fully charged under a certain condition (e.g., a preset discharge rate, a preset temperature, a preset end voltage, or the like), and generally, the battery has a battery rated capacity and a battery actual capacity, and the battery rated capacity is also referred to as a battery nominal capacity and may represent an electric quantity that can be released by the battery under an ideal condition specified by a design; and the actual capacity of the battery can represent the amount of electricity that the battery can release under actual conditions, and generally, the actual capacity of the battery of a new battery is the same as the rated capacity of the battery. As the battery is used and aged, the actual capacity of the battery gradually decreases relative to the rated capacity of the battery. Therefore, the actual capacity of the battery can be used as a measure of the battery performance, which reflects the health (or aging) of the battery. It should be noted that the battery capacity in the present invention is the actual battery capacity. The number of battery charges, also referred to as the number of battery charge/discharge cycles or the number of battery charge/discharge cycles, means that the battery completes charging and discharging 100% of the battery capacity once, and the number of battery charges is updated every time the battery is charged.
And step S20, determining a charging strategy of the battery according to the current environment temperature and the performance parameters of the battery.
After acquiring the current environment temperature and the performance parameters of the battery, the battery management system can comprehensively obtain a corresponding battery charging strategy according to the current environment and the performance parameters of the battery, wherein the battery charging strategy mainly refers to the voltage and the current adopted by the battery, and a constant-current charging mode and a constant-voltage current-limiting charging mode can be adopted when the battery is charged.
And step S30, charging the battery according to the charging strategy of the battery.
The battery management system respectively formulates corresponding charging strategies according to the current environment temperature and different health conditions of the battery. For example, when the current ambient temperature is low, the battery is charged in the low-temperature charging mode, whereas, at the current ambient temperature, the battery is charged in the high-temperature charging mode. For a battery with good health, the charging voltage and the charging current may be a rated charging voltage and a rated charging current; for batteries with reduced health, the charging voltage and charging current may be lower than the nominal charging voltage and nominal charging current; for batteries with a significantly reduced health condition, the charging voltage and charging current may be further reduced. Therefore, different charging strategies can be selected to charge the battery according to different current environments and in combination with performance parameters of the battery, the problem that the battery is unreasonably charged due to the influence of the environmental temperature in the charging process of the battery is effectively solved, and the service life of the battery is prolonged.
It should be noted that the performance parameters of the battery may also include discharge parameters of the battery, and the charging strategy of the battery is determined according to the discharge condition of the battery and the current ambient temperature, specifically, when the current ambient temperature is monitored to be low and the power failure condition of the battery is severe in the discharge process of the battery, it is indicated that the health condition of the battery is poor, that is, the aging degree is high, and at this time, in the charging process of the battery, a low-voltage charging may be adopted to ensure that the charging process is performed more slowly, so that the utilization rate of the battery may be effectively improved, and the service life of the battery may be prolonged; on the contrary, when the power failure condition is serious in the battery discharging process, the charging voltage can be increased to improve the charging speed. When the environment temperature is monitored to be high and the power failure condition of the battery in the discharging process is monitored to be serious, the low-voltage charging is also adopted to ensure the slow charging process, so that the service life of the battery is prolonged; on the contrary, when the power failure condition is serious in the battery discharging process, the charging can be carried out by adopting larger voltage so as to effectively improve the charging speed.
In the technical scheme provided by this embodiment, the current environment temperature and the performance parameters of the battery are obtained, wherein the performance parameters of the battery include at least one of the battery capacity and the charging frequency, the charging strategy of the battery is determined according to the current environment temperature and the performance parameters of the battery, and then the battery is reasonably charged according to the charging strategy of the battery, so that different charging strategies are selected to charge the battery according to the difference of the current environment and the performance parameters of the battery, the problem of unreasonable battery charging caused by the influence of the environment temperature in the battery charging process is effectively avoided, the utilization rate of the battery is improved, and the service life of the battery is prolonged.
Referring to fig. 3, fig. 3 is a second embodiment of the battery management method of the present invention, and based on the first embodiment, when the performance parameter of the battery is the battery capacity, step S20 includes:
and S21, when the current environment temperature is lower than the preset temperature threshold, the charging strategy of the battery is a low-temperature charging mode, and a first charging voltage and a first charging current of the battery are determined according to the battery capacity in the low-temperature charging mode.
The data of the charging strategy of the present invention may vary according to the actual situation (such as charging environment or battery type), and the charging strategy may be increased or decreased. Different charging modes are selected according to different current environment temperatures, the first charging voltage and the first charging current of the battery are determined according to different health conditions of the battery in the corresponding charging modes, different charging strategies are adopted to charge the battery, the service life of the battery can be prolonged, and aging of the battery is delayed. Specifically, when adopting the low temperature charge mode to charge the battery, because the low temperature, the charging capacity of battery is less strong, can adopt little charging voltage little charging current to charge earlier, in order to carry out the activation of slowly charging to the battery, after charging a period, can increase charging voltage and rechargeable battery, carry out quick charge to the battery, when being full of the electricity soon, for example charge to 90% of rated capacity time, reduce charging voltage and rechargeable battery again slightly, in order to guarantee that the battery is slowly full of, can improve the utilization ratio of battery like this, the life of extension battery.
In this embodiment, the preset temperature threshold may be in a range from 15 ℃ to 30 ℃, and may specifically be determined according to an actual situation, and the determined preset temperature threshold is stored in the battery management system, the battery management system monitors the current ambient temperature at any time, when the monitored current ambient temperature is lower than the preset temperature threshold, the corresponding battery charging policy is a low-temperature charging mode, and the first charging voltage and the first charging current of the battery are determined according to the battery capacity in the low-temperature charging mode. Here, the battery capacity may reflect the health condition of the battery, and there is a mapping correspondence relationship between the battery capacity and the charging voltage and the charging current of the battery, and the mapping correspondence relationship is recorded in a mapping table and stored in the battery management system. It should be noted that the determination of the first charging voltage and the first charging current of the battery according to the battery capacity described in the present embodiment includes the determination of the first charging voltage and the first charging current of the battery according to the battery capacity only, and does not involve other factors; situations where the charging voltage and charging current of the battery are determined based on the battery capacity and other performance parameters are also included.
In this embodiment, the charging parameters of the battery are described by taking the health condition of the battery divided into 3 stages as an example, where the charging parameters are the first charging voltage and the first charging current of the battery. When the health condition of the battery is divided into 3 stages, namely stage 1, stage 2 and stage 3. Specifically, in phase 1, the first charging voltage and the first charging current may be equal to the nominal charging voltage and the nominal charging current; in phase 2, the first charging voltage may be reduced by 25mV from the nominal charging voltage, and the first charging current may be reduced by 15% from the nominal charging current; in phase 3, the first charging voltage may be reduced by 50mV from the nominal charging voltage and the first charging current may be reduced by 30% from the nominal charging current. It should be noted that the amount of reduction of the first charging voltage and the first charging current may be determined according to a test condition of the battery, and a test standard or a test method known in the art may be adopted for the test of the battery, which is not described herein again.
The battery capacity and the charging parameters of the battery have a one-to-one correspondence relationship and are recorded in the table 1, the corresponding mapping table is stored in the battery management system in advance, and after the battery capacity is obtained, the corresponding charging parameters can be obtained from the mapping table. Specifically, the battery capacity threshold may be 90% and 75% of the rated battery capacity, and for convenience of description, the rated battery capacity is omitted below, and the battery capacity threshold is directly represented by 90% and 75%. Generally, the larger the proportion of the battery capacity relative to the rated capacity of the battery, the better the health condition of the battery, and when the battery capacity is greater than 90%, the battery management system selects the stage 1 as the charging parameter of the battery to charge the battery; when the battery capacity is more than 75% and less than or equal to 90%, the battery management system selects the stage 2 as a corresponding charging parameter to charge the battery; and when the battery capacity is less than or equal to 75%, the battery management system selects the stage 3 as a corresponding charging parameter to charge the battery. Table 1 lists the corresponding mapping of battery capacity C to charging parameters.
TABLE 1 mapping relationship table of battery capacity and charging parameter
| Capacity of battery | Stage sequence number | Charging voltage | Charging current |
| 90％＜C≤100％ | 1 | Is not changed | Is not changed |
| 75％＜C≤90％ | 2 | Decrease by 25mV | Reduce by 15 percent |
| C≤75％ | 3 | Decrease by 50mV | Reduce by 30 percent |
It is understood that, when the monitored current ambient temperature is lower than the preset temperature threshold, the charging strategy of the battery is a low-temperature charging mode, and the charging parameters of the battery, i.e. the first charging voltage and the first charging current of the battery, are determined according to the battery capacity in the low-temperature charging mode.
Further, step S30 includes:
s31, performing constant current charging on the battery, wherein the constant current value is a first charging current of the battery;
s32, after the charging is carried out for the preset time, the constant current charging is converted into constant voltage current limiting charging, and the constant voltage value is the charging voltage of the first battery;
and S33, when the battery charging reaches a preset threshold value of rated capacity, converting the constant voltage current-limiting charging into constant current charging, wherein the constant current value is the first charging current of the battery.
Specifically, the battery is first charged with a constant current, where the constant current is a first charging current of the battery, and the first charging current is determined by the battery capacity, as shown in table 1. Generally, after charging for 2-3 hours, the constant current charging is converted into constant voltage current-limiting charging, the constant voltage value is the first charging voltage of the battery, and the first charging voltage is determined according to the capacity of the battery. Here, the preset threshold value of the rated capacity is generally 80% -90% of the rated capacity, that is, when the battery is charged to 85% of the rated capacity, the constant voltage current limiting charging is converted into the constant current charging again. It can be understood that when the current environmental temperature is lower, the battery charging conversion capability is not strong, and the battery can be activated for a period of time by using a small current before the large-current quick charging is carried out, so that the utilization rate of the battery can be effectively improved, and the service life of the battery is prolonged.
Referring to fig. 4, fig. 4 is a diagram illustrating a third embodiment of a battery management method according to the present invention, where based on the first embodiment, when the performance parameter of the battery is a battery capacity and the performance parameter of the battery is a battery capacity, step S20 includes:
and S22, when the current environment temperature is higher than the preset temperature threshold, the charging strategy of the battery is a high-temperature charging mode, and a second charging voltage and a second charging current of the battery are determined according to the battery capacity in the high-temperature charging mode.
The battery management system monitors a current ambient temperature at any time, when the monitored current ambient temperature is higher than a preset temperature threshold, the corresponding battery charging strategy is a high-temperature charging mode, and a second charging voltage and a second charging current of the battery are determined according to the battery capacity in the high-temperature charging mode. Specifically, when adopting high temperature charging mode to charge the battery, because the high temperature, the charge capacity of battery is stronger, can directly adopt great charging voltage and great charging current to charge to carry out quick charge to the battery, when being full of the electricity soon, for example charge to when 90% of rated capacity, reduce charging voltage and charging current again slightly, in order to guarantee that the battery is slowly full of, can improve the utilization ratio of battery like this, prolong the life of battery.
Further, step 30 comprises:
s34, performing constant voltage current-limiting charging on the battery, wherein the constant voltage value is the second charging voltage of the battery;
and S35, when the battery charging reaches a preset threshold value of rated capacity, converting the constant voltage current-limiting charging into constant current charging, wherein the constant current value is a second charging current of the battery.
When the charging strategy of the battery is determined to be a high-temperature charging mode, the battery is charged in a constant-voltage current-limiting mode, wherein the second charging voltage of the battery is selected as the constant-voltage value, and the second charging voltage is determined according to the capacity of the battery. Here, the preset threshold value of the rated capacity is generally 80% -90% of the rated capacity, that is, when the battery is charged to 85% of the rated capacity, the constant voltage current limiting charging is converted into the constant current charging again. It can be understood that when the current ambient temperature is higher, the battery charging conversion capability is stronger, the activation of small current is not needed, and the battery is charged by adopting generally larger current, so that the utilization rate of the battery can be improved, and the service life of the battery is prolonged.
Referring to fig. 5, fig. 5 is a diagram illustrating a fourth embodiment of the battery management method according to the present invention, wherein based on the first embodiment, when the performance parameter of the battery is the battery capacity and the charging frequency, step S20 includes:
s23, when the current environment temperature is lower than the preset temperature threshold, determining that the charging strategy of the battery is a low-temperature charging mode, and judging whether the charging times of the battery is greater than or equal to the preset time threshold;
s24, if yes, determining a third charging voltage and a third charging current of the battery according to the battery capacity;
and S25, if not, determining a third charging voltage and a third charging current of the battery according to the battery capacity and the charging times of the battery.
In this embodiment, the performance parameters of the battery include battery capacity and charging times, a charging policy of the battery is determined according to a current environment temperature, when the current environment temperature is lower than a preset temperature threshold, the charging policy of the battery is in a low-temperature charging mode, and then the charging times of the battery are compared with the preset time threshold, where the preset threshold may be determined according to an actual situation, for example, 20 times, 30 times, or 50 times, and is not limited herein. It can be understood that when the number of charging times is greater than or equal to the preset threshold, the battery management system obtains enough battery charging cut-off capacity data, and since the battery capacity is determined by the charging information obtained by multiple times of full charging, the accuracy and reliability of obtaining the battery capacity data can be improved, at this time, only the third charging voltage and the third charging current of the battery need to be determined according to the battery capacity, and specifically, refer to the above embodiment table 1. When the charging frequency is less than the preset threshold value, the battery management system can reliably monitor the health condition of the battery according to the battery capacity and the battery charging frequency, and determine corresponding charging parameters according to the health condition of the battery, so that voltage reduction and current limitation of different degrees are carried out on the battery charging at proper time, the service life of the battery is prolonged, and the aging speed of the battery is delayed.
It should be noted that, during the service life of the battery, the number of battery charges may have a specific range, such as 300-; conversely, the greater the number of battery charges, the worse the health of the battery, and the higher the degree of aging, so the battery management system may determine the charging parameters according to the number of battery charges. Specifically, the battery management system sets a group of battery charging time thresholds, the battery charging time thresholds may be determined according to the test result of the battery, and the test result of the battery may be obtained by using the existing test standard or method, which is not described herein again. The threshold value of the charging times of the battery can be 300 times and 500 times, and when the charging times of the battery is less than or equal to 300 times, the battery management system selects the stage 1 as a corresponding charging parameter to charge the battery; when the battery capacity is more than 300 times and less than or equal to 500 times, the battery management system selects the stage 2 as a corresponding charging parameter to charge the battery; when the battery capacity is more than 500 times, the battery management system selects the phase 3 as the corresponding charging parameter to charge the battery. Table 2 lists the mapping relationship between the battery charging times T and the charging policy.
TABLE 2 mapping relationship table of battery capacity and charging parameter
| Capacity of battery | Stage sequence number | Charging voltage | Charging current |
| T≤300 | 1 | Is not changed | Is not changed |
| 300＜T≤500 | 2 | Decrease by 25mV | Reduce by 15 percent |
| T＞500 | 3 | Decrease by 50mV | Reduce by 30 percent |
It is understood that, when the performance parameter of the battery includes the battery capacity and the number of times of charging, the charging parameter of the battery, i.e., the third charging voltage and the third charging current of the battery, is obtained by integrating the battery capacity and the number of times of charging.
Referring to fig. 6, fig. 6 is a fifth embodiment of the battery management method according to the present invention, wherein based on the first embodiment, when the performance parameter of the battery is the battery capacity and the charging frequency, step S20 includes:
s26, when the current environment temperature is higher than the preset temperature threshold, determining that the charging strategy of the battery is a high-temperature charging mode, and judging whether the charging frequency of the battery is larger than or equal to the preset frequency threshold;
s27, if yes, determining a fourth charging voltage and a fourth charging current of the battery according to the battery capacity;
and S28, if not, determining a fourth charging voltage and a fourth charging current of the battery according to the battery capacity and the charging times of the battery.
Here, the charging strategy of the battery is determined according to the current environment temperature, when the current environment temperature is higher than a preset temperature threshold, the charging strategy of the battery is a high-temperature charging mode, and then the charging number of the battery is compared with a preset number threshold in the high-temperature charging mode, where the preset threshold may be determined according to actual conditions, for example, 20 times, 30 times, or 50 times, and the like, and is not limited herein. It can be understood that when the number of charging times is greater than or equal to the preset threshold, the battery management system obtains enough battery charging cut-off capacity data, and since the battery capacity is determined by the charging information obtained by multiple times of full charging, the accuracy and reliability of obtaining the battery capacity data can be improved, at this time, only the fourth charging voltage and the fourth charging current of the battery need to be determined according to the battery capacity, and specifically, refer to the above embodiment table 1. When the charging frequency is less than the preset threshold value, the battery management system can reliably monitor the health condition of the battery according to the battery capacity and the battery charging frequency, and determine corresponding charging parameters according to the health condition of the battery, so that voltage reduction and current limitation of different degrees are carried out on the battery charging at proper time, the service life of the battery is prolonged, and the aging speed of the battery is delayed. Specifically, the charging parameters of the battery are determined according to the battery capacity and the battery charging frequency, and reference may be made to table 1 and table 2 in the above embodiments, which are not described herein again.
Alternatively, in step S10, the battery capacity is obtained by:
acquiring the charging times of the battery, the charging time corresponding to each charging and the discharging time of the battery;
and determining the battery capacity according to the charging times of the battery, the charging time corresponding to each charging and the discharging time of the battery.
In the present embodiment, as the usage time of the battery increases, the battery capacity will be attenuated, so the charging time of the battery should be reduced accordingly.
And the charging and discharging times of the battery can be used for representing the service life of the battery. The battery management system can calculate the first attenuation amount of the battery capacity corresponding to each charging time length, calculate the second total attenuation amount of the battery capacity corresponding to each discharging time length and the third attenuation amount of the battery capacity corresponding to the current charging time length, and finally obtain the total attenuation amount according to the three, thereby determining the current capacity of the battery.
In addition, the charging time or the discharging time corresponding to different charging times has different influences on the battery capacity, and the larger the charging times is, the larger the influence of the corresponding charging time or the discharging time on the battery capacity is. For example, at the time of the first charging, the attenuation influence factor of the charging time period on the battery capacity is 0.8, that is, the attenuation amount of the battery capacity corresponding to the first charging time period is 0.8 × a1, and a1 is determined according to the numerical value of the charging time period; and during the second charging, the fading influence factor of the charging time period on the battery capacity is 0.85, that is, the fading quantity of the battery capacity corresponding to the second charging time period is 0.85 × a 2. The battery management system can determine the total attenuation amount of the battery capacity through the attenuation influence factor so as to determine the battery capacity.
To achieve the above object, the present invention further provides a battery management system, which includes a processor, a memory, and a battery management program stored in the memory and operable on the processor, wherein the battery management program, when executed by the processor, implements the steps of the battery management method according to the above embodiment.
To achieve the above object, the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a battery management program, and the battery management program, when executed by a processor, implements the steps of the battery management method according to the above embodiment.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a computer-readable storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above, and includes several instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A battery management method, characterized in that the battery management method comprises the steps of:
acquiring current environment temperature and performance parameters of a battery, wherein the performance parameters of the battery comprise at least one of battery capacity and charging times;
determining a charging strategy of the battery according to the current environment temperature and the performance parameters of the battery;
charging the battery according to the charging strategy of the battery;
when the performance parameter of the battery is the battery capacity, the step of determining the charging strategy of the battery according to the current environment temperature and the performance parameter of the battery comprises the following steps:
when the current environment temperature is lower than a preset temperature threshold, the charging strategy of the battery is a low-temperature charging mode, and a first charging voltage and a first charging current of the battery are determined according to the capacity of the battery in the low-temperature charging mode;
when the performance parameter is the battery capacity, the step of determining the charging strategy of the battery according to the current environment temperature and the performance parameter of the battery comprises the following steps:
when the current environment temperature is higher than the preset temperature threshold, the charging strategy of the battery is a high-temperature charging mode, and a second charging voltage and a second charging current of the battery are determined according to the capacity of the battery in the high-temperature charging mode.
2. The battery management method of claim 1, wherein the step of charging the battery according to the charging policy of the battery comprises:
charging the battery at a constant current, wherein the constant current value is a first charging current of the battery;
after the charging is carried out for the preset time, converting the constant-current charging into constant-voltage current-limiting charging, wherein the constant voltage value is the first charging voltage of the battery;
when the battery charging reaches a preset threshold value of rated capacity, the constant voltage current-limiting charging is converted into constant current charging, and the constant current value is the first charging current of the battery.
3. The battery management method of claim 1, wherein the step of charging the battery according to the charging policy of the battery comprises:
performing constant-voltage current-limiting charging on the battery, wherein the constant voltage value is a second charging voltage of the battery;
and when the battery charging reaches a preset threshold value of rated capacity, converting the constant-voltage current-limiting charging into constant-current charging, wherein the constant-current value is a second charging current of the battery.
4. The battery management method according to claim 1, wherein when the performance parameters of the battery include a battery capacity and a number of times of charging, the step of determining the charging policy of the battery according to the current ambient temperature and the performance parameters of the battery comprises:
when the current environment temperature is lower than a preset temperature threshold, determining that the charging strategy of the battery is a low-temperature charging mode, and judging whether the charging frequency of the battery is greater than or equal to the preset frequency threshold;
if so, determining a third charging voltage and a third charging current of the battery according to the battery capacity;
and if not, determining a third charging voltage and a third charging current of the battery according to the battery capacity and the charging times of the battery.
5. The battery management method according to claim 1, wherein when the performance parameters of the battery include a battery capacity and a number of times of charging, the step of determining the charging policy of the battery according to the current ambient temperature and the performance parameters of the battery comprises:
when the current environment temperature is higher than a preset temperature threshold, determining that the charging strategy of the battery is a high-temperature charging mode, and judging whether the charging times of the battery are greater than or equal to a preset time threshold;
if yes, determining a fourth charging voltage and a fourth charging current of the battery according to the battery capacity;
and if not, determining a fourth charging voltage and a fourth charging current of the battery according to the battery capacity and the charging times of the battery.
6. The battery management method according to any one of claims 1 to 5, wherein the battery capacity is obtained by:
acquiring the charging times of the battery, the charging time corresponding to each charging and the discharging time of the battery;
and determining the battery capacity according to the charging times of the battery, the charging time corresponding to each charging and the discharging time of the battery.
7. A battery management system comprising a processor, a memory, and a battery management program stored on the memory and executable on the processor, the battery management program when executed by the processor implementing the steps of the battery management method of any of claims 1-6.
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| CN111106400B (en) * | 2019-12-27 | 2021-10-22 | 联想(北京)有限公司 | Battery control method and battery management equipment |
| CN113287220A (en) * | 2020-01-13 | 2021-08-20 | 深圳市大疆创新科技有限公司 | Battery protection method, system, movable platform, battery and storage medium |
| CN112789758A (en) * | 2020-01-13 | 2021-05-11 | 深圳市大疆创新科技有限公司 | Battery control method, movable platform, system and computer readable storage medium |
| CN112956103A (en) * | 2020-01-13 | 2021-06-11 | 深圳市大疆创新科技有限公司 | Battery control method, apparatus and storage medium |
| CN111736860A (en) * | 2020-05-21 | 2020-10-02 | 华人运通(江苏)技术有限公司 | Vehicle battery management software updating method, device and equipment |
| CN111769338B (en) * | 2020-07-10 | 2023-06-20 | 陕西航空电气有限责任公司 | Method for charging storage battery by aviation distribution product charger |
| CN111993953B (en) * | 2020-08-27 | 2021-10-29 | 安徽江淮汽车集团股份有限公司 | Battery control method, power automobile and readable storage medium |
| CN113131020B (en) * | 2021-05-08 | 2022-02-22 | 深圳市驰普科达科技有限公司 | Big health management system of industrial battery pack |
| CN113394468A (en) * | 2021-06-10 | 2021-09-14 | 苏州阳光动力电子科技有限公司 | Battery management method and related components thereof |
| CN115395613B (en) * | 2022-09-13 | 2023-06-13 | 协鑫电港云科技(海南)有限公司 | Battery charging management method and device, electronic equipment and storage medium |
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