CN113138343B - Capacity calibration method for battery system, battery system and readable storage medium - Google Patents
Capacity calibration method for battery system, battery system and readable storage medium Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract
The invention discloses a capacity calibration method of a battery system, the battery system and a readable storage medium, wherein the battery system comprises at least two groups of parallel battery clusters, and the capacity calibration method of the battery system comprises the following steps: when the battery clusters with the discharging capacity exist in the battery system, acquiring the current first charge state and the first accumulated charge amount of each battery cluster; charging each of the battery clusters in the battery system; when detecting that the battery clusters with full charge exist in the battery system, acquiring a current second charge state and a second accumulated charge of each battery cluster; and generating the total battery capacity of each battery cluster according to the first charge state, the first accumulated charge amount, the second charge state and the second accumulated charge amount of each battery cluster, thereby improving the accuracy of the total battery capacity obtained by calculation.
Description
Technical Field
The present invention relates to the field of battery technologies, and in particular, to a capacity calibration method for a battery system, and a readable storage medium.
Background
As shown in fig. 1, the battery system is generally configured by connecting a plurality of battery clusters RACK in parallel, and is managed by a multi-stage BMS (Battery Management System ). Wherein, each battery PACK in the RACK is managed by a corresponding BMU (Battery Management Unit ); each RACK is managed by a corresponding CMU (Battery Cluster Management Unit ) respectively; the CMUs in the whole system are uniformly managed by one SMU (System Management Unit ), i.e., the BMS in the battery system is composed of the CMUs in the whole system and one SMU.
In the long-term running process of the battery system, due to the problems of battery aging and the like, the battery capacity is gradually attenuated, and the existing capacity calibration method is to charge the RACK from an empty state to a full charge state, and then obtain the current actual capacity of the RACK according to the actual charge amount. Due to inconsistent battery materials or originally stored electric quantity, each RACK in the battery system cannot reach a full charge/full discharge state at the same time, so that the actual full charge/full discharge amount cannot be obtained, and the accuracy of the battery capacity calculated based on the measurement is low.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a capacity calibration method of a battery system, the battery system and a readable storage medium, and aims to improve the accuracy of the total battery capacity obtained through measurement and calculation.
In order to achieve the above object, the present invention provides a capacity calibration method of a battery system, the capacity calibration method of the battery system comprising the steps of:
when the battery clusters with the discharging capacity exist in the battery system, acquiring the current first charge state and the first accumulated charge amount of each battery cluster;
charging each of the battery clusters in the battery system;
when detecting that the battery clusters with full charge exist in the battery system, acquiring a current second charge state and a second accumulated charge of each battery cluster;
generating a total battery capacity of each of the battery clusters according to the first state of charge, the first accumulated charge, the second state of charge, and the second accumulated charge of each of the battery clusters.
Optionally, the step of generating the total battery capacity of each of the battery clusters according to the first state of charge, the first accumulated charge, the second state of charge, and the second accumulated charge of each of the battery clusters includes:
Determining a state of charge change value for each of the battery clusters based on a difference between the second state of charge and the first state of charge of each of the battery clusters;
determining an actual charge amount of each of the battery clusters according to a difference between the second accumulated charge amount and the first accumulated charge amount of each of the battery clusters;
and determining the total battery capacity of each battery cluster according to the ratio between the state of charge change value and the actual charge of each battery cluster.
Optionally, the step of obtaining the current first state of charge and the first accumulated charge of each battery cluster includes:
acquiring a current first initial charge state of each battery cluster;
calibrating the first initial state of charge according to the current operation parameters of each battery cluster, and taking the calibrated state of charge as a first state of charge;
acquiring a current first accumulated charge amount of each battery cluster;
the step of obtaining the current second state of charge and the second accumulated charge of each battery cluster includes:
acquiring a current second initial charge state of each battery cluster;
calibrating the second initial state of charge according to the current operation parameters of each battery cluster, and taking the calibrated state of charge as a second state of charge;
And acquiring the current second accumulated charge of each battery cluster.
Optionally, after the step of charging each of the battery clusters in the battery system, the method further includes:
when detecting that a discharge current exists in the battery system, acquiring the current residual capacity of each battery cluster;
and judging whether the battery cluster with the zero residual capacity exists, wherein when the battery cluster with the zero residual capacity exists in the battery system, judging that the battery cluster with the full charge exists in the battery system.
Optionally, after the step of obtaining the current remaining capacity of each battery cluster, the method further includes:
when no battery cluster with zero residual capacity exists in the battery system, acquiring a second charge state of each battery cluster in an OCV_SOC calibration mode;
acquiring a second accumulated charge amount of each of the battery clusters;
generating a total battery capacity of each of the battery clusters according to the first state of charge, the first accumulated charge, the second state of charge, and the second accumulated charge of each of the battery clusters.
Optionally, the step of obtaining the current remaining capacity of each battery cluster when detecting that a discharge current exists in the battery system includes:
Acquiring the temperature of each battery cluster when the existence of discharge current in the battery system is detected;
when the battery clusters with the temperature exceeding a preset temperature interval do not exist, acquiring the current residual capacity of each battery cluster;
and outputting prompt information of calibration errors when the battery cluster with the temperature exceeding the preset temperature interval exists.
Optionally, before the step of acquiring the current first state of charge and the first accumulated charge of each battery cluster when the battery cluster with the empty capacity exists in the battery system, the method further includes:
judging whether the battery clusters with the discharging capacity exist in the battery system or not;
when the battery clusters with the discharging capacity do not exist in the battery system, acquiring the current first charge state of each battery cluster in an OCV_SOC calibration mode;
acquiring a current first accumulated charge amount of each battery cluster;
the step of charging each of the battery clusters in the battery system is performed.
In addition, in order to achieve the above object, the present invention also provides a capacity calibration method of a battery system, the capacity calibration method of the battery system comprising the steps of:
When the battery clusters with full charge exist in the battery system, acquiring the current first charge state and the first accumulated discharge amount of each battery cluster;
controlling discharge of each of the battery clusters in the battery system;
when the battery clusters with the discharging capacity in the battery system are detected, acquiring the current second charge state and the second accumulated discharging capacity of each battery cluster;
and generating the total battery capacity of each battery cluster according to the first charge state, the first accumulated discharge amount, the second charge state and the second accumulated discharge amount of each battery cluster.
In addition, in order to achieve the above object, the present invention also proposes a battery system including: the system comprises a memory, a processor and a capacity calibration program of the battery system stored in the memory and capable of running on the processor, wherein the capacity calibration program of the battery system realizes the steps of the capacity calibration method of the battery system when being executed by the processor.
In addition, in order to achieve the above object, the present invention also proposes a readable storage medium having stored thereon a capacity calibration program of a battery system, which when executed by a processor, implements the steps of the capacity calibration method of a battery system as described above.
The embodiment of the invention provides a capacity calibration method of a battery system, the battery system and a readable storage medium, wherein when a battery cluster with the discharging capacity exists in the battery system, the current first charge state and the first accumulated charge amount of each battery cluster are obtained; charging each of the battery clusters in the battery system; when detecting that the battery clusters with full charge exist in the battery system, acquiring a current second charge state and a second accumulated charge of each battery cluster; and generating the total battery capacity of each battery cluster according to the first charge state, the first accumulated charge amount, the second charge state and the second accumulated charge amount of each battery cluster, thereby improving the accuracy of the battery capacity obtained by calculation.
Drawings
Fig. 1 is a schematic system configuration diagram of a battery system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a hardware architecture of a battery system according to an embodiment of the present invention;
FIG. 3 is a flow chart of a first embodiment of a method for calibrating capacity of a battery system according to the present invention;
FIG. 4 is a flow chart of a second embodiment of a method for calibrating capacity of a battery system according to the present invention;
FIG. 5 is a flow chart of a third embodiment of a method for calibrating capacity of a battery system according to the present invention;
FIG. 6 is a flow chart of a fourth embodiment of a method for calibrating capacity of a battery system according to the present invention;
FIG. 7 is a flow chart of a fifth embodiment of a method for calibrating capacity of a battery system according to the present invention;
FIG. 8 is a flowchart of a sixth embodiment of a method for calibrating capacity of a battery system according to the present invention;
FIG. 9 is a flow chart of a seventh embodiment of a method for calibrating capacity of a battery system according to the present invention;
fig. 10 is a flowchart illustrating a capacity calibration method of a battery system according to an eighth embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the long-term running process of the battery system, due to the problems of battery aging and the like, the battery capacity is gradually attenuated, and the existing capacity calibration method is to charge the RACK from an empty state to a full charge state, and then obtain the current actual capacity of the RACK according to the actual charge amount. Due to inconsistent battery materials or originally stored electric quantity, each RACK in the battery system cannot reach a full charge/full discharge state at the same time, so that the actual full charge/full discharge amount cannot be obtained, and the accuracy of the battery capacity calculated based on the measurement is low.
To solve the above-mentioned drawbacks, an embodiment of the present invention provides a capacity calibration method of a battery system, a battery system and a readable storage medium, wherein the capacity calibration method of the battery system mainly includes the following steps:
when the battery clusters with the discharging capacity exist in the battery system, acquiring the current first charge state and the first accumulated charge amount of each battery cluster;
charging each of the battery clusters in the battery system;
when detecting that the battery clusters with full charge exist in the battery system, acquiring a current second charge state and a second accumulated charge of each battery cluster;
generating a total battery capacity of each of the battery clusters according to the first state of charge, the first accumulated charge, the second state of charge, and the second accumulated charge of each of the battery clusters.
According to the scheme, when at least one battery cluster with the emptying capacity exists in the battery system, the current first charge state and the first accumulated charge amount of each battery cluster are obtained, then each battery cluster is charged, when at least one battery cluster with the full charge amount exists in the battery system is detected, the current second charge state and the second accumulated charge amount of each battery cluster are obtained again, and therefore when the first charge state, the first accumulated charge amount, the second charge state and the second accumulated charge amount are not achieved at the same time, the total battery capacity of each battery cluster can be calculated based on the first charge state, the first accumulated charge amount, the second charge state and the second accumulated charge amount, namely, the total battery capacity of the battery clusters can be calculated without obtaining the actual full charge amount/full charge amount, and the accuracy of the calculated total battery capacity is improved.
As shown in fig. 2, fig. 2 is a schematic diagram of a hardware architecture of a battery system according to an embodiment of the present invention.
The battery system may be a device for storing electric energy, such as an energy storage system.
As shown in fig. 2, the battery system may include: a processor 1001, such as a CPU, a user interface 1003, a network interface 1004, a battery pack 1005, a memory 1006, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display (Display), an input unit such as a keyboard, etc., and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1006 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1006 may also optionally be a storage device separate from the processor 1001 described above.
Those skilled in the art will appreciate that the hardware architecture of the battery system shown in fig. 2 does not constitute a limitation of the battery system, and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 2, an operating system, a network communication module, a user interface module, and a capacity calibration program of the battery system may be included in the memory 1006, which is a type of computer storage medium.
In the battery system shown in fig. 2, the network interface 1004 is mainly used for connecting to a background server and performing data communication with the background server; the processor 1001 may be configured to call a capacity calibration program of the battery system stored in the memory 1006 and perform the following operations:
when the battery clusters with the discharging capacity exist in the battery system, acquiring the current first charge state and the first accumulated charge amount of each battery cluster;
charging each of the battery clusters in the battery system;
when detecting that the battery clusters with full charge exist in the battery system, acquiring a current second charge state and a second accumulated charge of each battery cluster;
generating a total battery capacity of each of the battery clusters according to the first state of charge, the first accumulated charge, the second state of charge, and the second accumulated charge of each of the battery clusters.
Further, the processor 1001 may be configured to invoke a capacity calibration program of the battery system stored in the memory 1006, and further perform the following operations:
Determining a state of charge change value for each of the battery clusters based on a difference between the second state of charge and the first state of charge of each of the battery clusters;
determining an actual charge amount of each of the battery clusters according to a difference between the second accumulated charge amount and the first accumulated charge amount of each of the battery clusters;
and determining the total battery capacity of each battery cluster according to the ratio between the state of charge change value and the actual charge of each battery cluster.
Further, the processor 1001 may be configured to invoke a capacity calibration program of the battery system stored in the memory 1006, and further perform the following operations:
acquiring a current first initial charge state of each battery cluster;
calibrating the first initial state of charge according to the current operation parameters of each battery cluster, and taking the calibrated state of charge as a first state of charge;
acquiring a current first accumulated charge amount of each battery cluster;
the step of obtaining the current second state of charge and the second accumulated charge of each battery cluster includes:
acquiring a current second initial charge state of each battery cluster;
Calibrating the second initial state of charge according to the current operation parameters of each battery cluster, and taking the calibrated state of charge as a second state of charge;
and acquiring the current second accumulated charge of each battery cluster.
Further, the processor 1001 may be configured to invoke a capacity calibration program of the battery system stored in the memory 1006, and further perform the following operations:
when detecting that a discharge current exists in the battery system, acquiring the current residual capacity of each battery cluster;
and judging whether the battery cluster with the zero residual capacity exists, wherein when the battery cluster with the zero residual capacity exists in the battery system, judging that the battery cluster with the full charge exists in the battery system.
Further, the processor 1001 may be configured to invoke a capacity calibration program of the battery system stored in the memory 1006, and further perform the following operations:
when no battery cluster with zero residual capacity exists in the battery system, acquiring a second charge state of each battery cluster in an OCV_SOC calibration mode;
acquiring a second accumulated charge amount of each of the battery clusters;
generating a total battery capacity of each of the battery clusters according to the first state of charge, the first accumulated charge, the second state of charge, and the second accumulated charge of each of the battery clusters.
Further, the processor 1001 may be configured to invoke a capacity calibration program of the battery system stored in the memory 1006, and further perform the following operations:
acquiring the temperature of each battery cluster when the existence of discharge current in the battery system is detected;
when the battery clusters with the temperature exceeding a preset temperature interval do not exist, acquiring the current residual capacity of each battery cluster;
and outputting prompt information of calibration errors when the battery cluster with the temperature exceeding the preset temperature interval exists.
Further, the processor 1001 may be configured to invoke a capacity calibration program of the battery system stored in the memory 1006, and further perform the following operations:
judging whether the battery clusters with the discharging capacity exist in the battery system or not;
when the battery clusters with the discharging capacity do not exist in the battery system, acquiring the current first charge state of each battery cluster in an OCV_SOC calibration mode;
acquiring a current first accumulated charge amount of each battery cluster;
the step of charging each of the battery clusters in the battery system is performed.
Further, the processor 1001 may be configured to invoke a capacity calibration program of the battery system stored in the memory 1006, and further perform the following operations:
When the battery clusters with full charge exist in the battery system, acquiring the current first charge state and the first accumulated discharge amount of each battery cluster;
controlling discharge of each of the battery clusters in the battery system;
when the battery clusters with the discharging capacity in the battery system are detected, acquiring the current second charge state and the second accumulated discharging capacity of each battery cluster;
and generating the total battery capacity of each battery cluster according to the first charge state, the first accumulated discharge amount, the second charge state and the second accumulated discharge amount of each battery cluster.
As shown in fig. 3, in a first embodiment of the capacity calibration method of the battery system of the present invention, the capacity calibration method of the battery system includes the steps of:
step S1010, when there is a battery cluster with a discharged electric quantity in the battery system, acquiring a current first state of charge and a first accumulated charge of each battery cluster;
the state of charge (SOC) refers to the ratio of the remaining capacity of a battery cluster after being used for a period of time or being left unused for a long period of time to the capacity of the fully charged state of the battery cluster, and is expressed as a common percentage. The value range is 0-1, when soc=0, the battery cluster is completely discharged, namely the electric quantity is discharged, and when soc=1, the battery cluster is completely filled, namely the full charge.
The accumulated charge amount is the accumulated charge amount of the battery cluster from the start of use to the moment.
Step S1020, charging each of the battery clusters in the battery system;
step S1030, when detecting that the battery clusters with full charge exist in the battery system, acquiring a current second state of charge and a second accumulated charge of each battery cluster;
step S1040, generating a total battery capacity of each of the battery clusters according to the first state of charge, the first accumulated charge, the second state of charge, and the second accumulated charge of each of the battery clusters.
In this embodiment, the processor may specifically refer to a BMS, when receiving the request information for capacity calibration, determine whether there is a battery cluster with a empty charge in the battery system, for example, may obtain the charge of all battery clusters in the battery system through the CMU, and determine, when there is a battery cluster with a zero charge, whether there is a battery cluster with a empty charge in the battery system.
When the processor judges that a battery cluster with the empty electric quantity exists in the battery system, the processor acquires the current first charge state of the battery cluster, and then acquires the accumulated charge quantity of the battery cluster at the moment as the first accumulated charge quantity. And then controlling the whole battery system to charge, specifically, all battery clusters in the battery system, and then acquiring the current second charge state and the second accumulated charge amount of the battery clusters when the battery clusters with full charge are detected in the battery system. Finally, the processor calculates the total battery capacity of each battery cluster according to the acquired first charge state, the first accumulated charge amount, the second charge state and the second accumulated charge amount of each battery cluster.
In the technical scheme disclosed in this embodiment, when at least one battery cluster with an empty capacity is detected in the battery system, a current first charge state and a first accumulated charge amount of each battery cluster are obtained, then each battery cluster is charged, and when at least one battery cluster with a full charge amount is detected in the battery system, a current second charge state and a second accumulated charge amount of each battery cluster are obtained again, so that when each battery cluster does not reach the full charge state at the same time, the total battery capacity of each battery cluster can be calculated based on the first charge state, the first accumulated charge amount, the second charge state and the second accumulated charge amount, namely, the total battery capacity of each battery cluster can be calculated without obtaining an actual full charge amount/full charge amount, and the accuracy of the calculated total battery capacity is improved.
Optionally, as shown in fig. 4, based on the first embodiment, in a second embodiment of the capacity calibration method of the battery system of the present invention, the step S1040 further includes:
step S1041, determining a state of charge change value of each battery cluster according to a difference value between the second state of charge and the first state of charge of each battery cluster;
Step S1042 of determining an actual charge amount of each of the battery clusters according to a difference between the second accumulated charge amount and the first accumulated charge amount of each of the battery clusters;
step S1043, determining a total battery capacity of each battery cluster according to a ratio between the state of charge change value and the actual charge amount of each battery cluster.
In this embodiment, the processor sequentially obtains a difference value between the second state of charge and the first state of charge of each battery cluster, that is, a state of charge change value of each battery cluster, then sequentially obtains a difference value between the second accumulated charge and the first accumulated charge of each battery cluster, that is, an actual charge of each battery cluster, and finally sequentially obtains a ratio between the state of charge change value and the actual charge of each battery cluster, that is, a total battery capacity of each battery cluster.
In the technical scheme disclosed in the embodiment, the total battery capacity of each battery cluster is calculated through the first charge state, the first accumulated charge amount, the second charge state and the second accumulated charge amount, and the total battery capacity of the battery cluster is calculated under the condition that the actual full charge/full discharge amount is not needed, so that the accuracy of the calculated total battery capacity is improved.
Optionally, as shown in fig. 5, based on the first embodiment, in a third embodiment of the capacity calibration method of the battery system of the present invention, the step S1010 further includes:
step S1011, obtaining a current first initial charge state of each battery cluster;
step S1012, calibrating the first initial state of charge according to the current operation parameter of each battery cluster, and taking the calibrated state of charge as a first state of charge;
step S1013, obtaining the current first accumulated charge of each battery cluster;
step S1030 further includes:
step S1031, obtaining a current second initial state of charge of each battery cluster;
step S1032, calibrating the second initial state of charge according to the current operation parameter of each battery cluster, and taking the calibrated state of charge as a second state of charge;
step S1033, obtaining a current second accumulated charge of each battery cluster.
In this embodiment, the processor obtains a current state of charge of each battery cluster as a first initial state of charge, obtains current operation parameters of each battery cluster, then calibrates the first initial state of charge according to the operation parameters of each battery cluster, uses the calibrated state of charge as the first state of charge, and then obtains a current first accumulated charge of each battery cluster; correspondingly, the processor acquires the current state of charge of each battery cluster as a second initial state of charge, acquires current operating parameters of each battery cluster, calibrates the second initial state of charge according to the operating parameters of each battery cluster, takes the calibrated state of charge as the second state of charge, and acquires the current second accumulated charge of each battery cluster.
Specifically, when the processor determines that a battery cluster with a discharged electric quantity exists in the battery system, the CMU acquires parameter information of the processor, wherein the parameter information comprises a current extreme voltage and an SOC of the battery cluster, the SOC is a current state of charge of the battery cluster, namely an initial state of charge before SOC calibration, the parameter information is then sent to the SMU, when the SMU receives the parameter information, a calibration instruction is generated according to the parameter information and is sent to the CMU, the CMU executes the calibration instruction to acquire the calibrated SOC, the SOC is taken as the current SOC of the battery cluster, namely the current first state of charge of the battery cluster, and then the accumulated charge of the battery cluster at the moment is acquired as the first accumulated charge.
When the processor determines that the battery cluster with the full charge exists in the battery system, the current second state of charge and the second accumulated charge of the battery cluster are obtained in the foregoing manner, which is not described herein.
In the technical scheme disclosed in the embodiment, the total capacity of the battery with higher accuracy is obtained by calibrating the charge state of the battery cluster, so that the accuracy of the total battery capacity obtained by measurement and calculation is improved.
Optionally, as shown in fig. 6, in a fourth embodiment of the capacity calibration method of the battery system according to the present invention, after the step S1020, the method further includes:
Step S1050, when detecting that a discharge current exists in the battery system, acquiring the current residual capacity of each battery cluster;
step S1060, determining whether there is a battery cluster with zero remaining capacity, wherein when there is a battery cluster with zero remaining capacity in the battery system, it is determined that there is a battery cluster with full charge in the battery system.
In this embodiment, the processor detects the discharging situation in the battery system in real time after charging all the battery clusters in the battery system, and obtains the remaining capacity of all the battery clusters in the battery system through the CMU when detecting that the discharging current exists in the battery system, and determines that the battery clusters with full charge exist in the battery system when the remaining capacity is zero, specifically, the present solution does not limit the process of determining whether the battery clusters with full charge exist.
In the technical scheme disclosed in the embodiment, whether a fully charged battery cluster exists in the battery clusters is judged through the residual capacity, so that a mode of acquiring the charge state of the battery clusters later is determined.
Optionally, as shown in fig. 7, in a fifth embodiment of the capacity calibration method of a battery system according to the present invention, after the step S1060, the method further includes:
Step S1070, when there is no battery cluster with zero remaining capacity in the battery system, acquiring a second state of charge of each battery cluster by an ocv_soc calibration method;
step S1080, obtaining a second accumulated charge of each battery cluster;
step S1090 generates a total battery capacity of each of the battery clusters according to the first state of charge, the first accumulated charge, the second state of charge, and the second accumulated charge of each of the battery clusters.
In this embodiment, the ocv_soc calibration method is a process of obtaining a state of charge corresponding to a voltage of a battery cluster through an ocv_soc curve, where the battery cluster model (i.e., related composition parameters) is different, and the ocv_soc curve is also different.
When no battery cluster with zero residual capacity exists, the processor acquires the second charge state of each battery cluster through the OCV_SOC calibration curve corresponding to each battery cluster, and then executes the process of acquiring the second accumulated charge and calculating the total capacity of the battery, which is not described herein.
In the technical scheme disclosed in this embodiment, due to the characteristics of the battery cluster, the situation of possible charge interruption may be caused, so as to affect the judgment of the charging process of the battery cluster and the full charge judgment of the battery cluster, and by acquiring the mapping model between the extreme voltage and the state of charge, the situation that the state of charge of the battery cluster cannot be acquired due to the foregoing reasons is avoided.
As shown in fig. 8, in a sixth embodiment of the capacity calibration method of a battery system according to the present invention, based on the fourth embodiment, the step S1050 further includes:
step S1051, when detecting that a discharge current exists in the battery system, acquiring the temperature of each battery cluster;
step S1052, when the battery clusters with the temperature exceeding a preset temperature interval do not exist, acquiring the current residual capacity of each battery cluster;
the preset temperature interval is the temperature of the battery cluster in the normal discharging/charging process, and when the temperature of the battery cluster exceeds the preset temperature interval, abnormal discharging/abnormal charging of the battery cluster may be caused.
Step S1053, outputting a warning message of calibration error when the battery cluster with the temperature exceeding the preset temperature interval exists.
In this embodiment, when the processor detects that a discharge current exists in the battery system, the processor first obtains the temperature of each battery cluster, determines that the battery cluster is normally charged when the temperature of the battery cluster is within a preset temperature interval, then obtains the current remaining capacity of each battery cluster, and then executes the process of obtaining the total capacity of the battery clusters, which is not described herein again.
When the temperature of the battery cluster exceeds a preset temperature interval, the battery cluster is judged to have abnormal charging, the capacity calibration process of the battery cluster is influenced, and prompt information of the capacity calibration error of the battery cluster is directly output.
In the technical scheme disclosed in the embodiment, by acquiring the temperature of the battery cluster, whether the battery cluster is normally discharged or not is judged, and under the condition that abnormal charging is avoided, the error battery cluster capacity is used as the calibrated capacity, so that the accuracy of measuring and calculating the battery cluster capacity is improved.
Optionally, as shown in fig. 9, in a seventh embodiment of the capacity calibration method of a battery system according to the present invention, before the step S1010, the method further includes:
step S1100, judging whether the battery clusters with the discharged electric quantity exist in the battery system or not;
step 1110, when there is no battery cluster with empty power in the battery system, acquiring a current first charge state of each battery cluster in an ocv_soc calibration mode;
step S1120, acquiring a current first accumulated charge of each battery cluster;
step S1020 is performed.
In this embodiment, when receiving the request information for capacity calibration, the processor determines whether a battery cluster with a dead charge exists in the battery system, and when a battery cluster with a dead charge does not exist in the battery system, the processor may acquire the first state of charge of each battery cluster through the ocv_soc calibration curve corresponding to each battery cluster, and then execute the foregoing process of charging each battery cluster in the battery system until the total capacity of the battery is calculated, which is not described herein again.
In the technical scheme disclosed in the embodiment, the current state of charge of the battery cluster is obtained by obtaining the mapping model between the extreme voltage and the state of charge, so that the situation that capacity calibration cannot be performed due to the fact that the battery cluster with no emptying electric quantity exists in the battery system is avoided, and the applicability of measuring and calculating the total battery capacity of the battery cluster is improved.
As shown in fig. 10, in an eighth embodiment of the capacity calibration method of the battery system of the present invention, the capacity calibration method of the battery system includes the steps of:
step S2010, when there is a fully charged battery cluster in the battery system, acquiring a current first state of charge and a first accumulated discharge amount of each battery cluster;
step S2020, controlling discharge of each of the battery clusters in the battery system;
step S2030, when detecting that the battery clusters with the discharge capacity exist in the battery system, acquiring a current second state of charge and a second accumulated discharge capacity of each battery cluster;
step S2040, generating a total battery capacity of each of the battery clusters according to the first state of charge, the first accumulated discharge amount, the second state of charge, and the second accumulated discharge amount of each of the battery clusters.
In this embodiment, the processor may specifically refer to a BMS, when receiving the request information for capacity calibration, determine whether a fully charged battery cluster exists in the battery system, for example, may obtain electric quantities of all battery clusters in the battery system through the CMU, and determine that a fully charged battery cluster exists in the battery system when a battery cluster with zero remaining capacity exists.
When the processor judges that a full charge battery cluster exists in a battery system, the CMU acquires parameter information of the processor, wherein the parameter information comprises extreme value single voltage and SOC of the battery cluster, then the parameter information is sent to the SMU, when the SMU receives the parameter information, a calibration instruction is generated according to the parameter information and is sent to the CMU, the CMU executes the calibration instruction to acquire the calibrated SOC, the SOC is taken as the current SOC of the battery cluster, namely the current first charge state of the battery cluster is acquired, and then the accumulated discharge capacity of the battery cluster at the moment is acquired as the first accumulated discharge capacity. Then controlling the whole battery system to discharge, namely controlling all battery clusters in the battery system to discharge, and then monitoring whether the battery clusters with the empty electric quantity exist in the battery system, for example, when the charging current exists in the battery system, the electric quantity of all battery clusters in the battery system can be obtained through the CMU, when the battery clusters with the electric quantity of zero exist in the battery system, the battery clusters with the empty electric quantity are judged to exist in the battery system, and specifically, the process of determining whether the battery clusters with the empty electric quantity exist is not limited by the scheme.
Optionally, when detecting that a charging current exists in the battery system, the processor firstly acquires the temperature of each battery cluster, when the temperature of the battery cluster is in a preset temperature interval, judges that the battery cluster is normally discharged, and then executes the process of acquiring the current electric quantity of each battery cluster; when the temperature of the battery cluster exceeds a preset temperature interval, the battery cluster is judged to have abnormal discharge, the capacity calibration process of the battery cluster is influenced, and prompt information of the capacity calibration error of the battery cluster is directly output.
When the processor determines that the battery cluster with the empty electric quantity exists in the battery system, the current second charge state and the second accumulated electric quantity of the battery cluster are obtained through the method, and the details are not repeated. And finally, the processor calculates the total battery capacity of each battery cluster according to the acquired first charge state, the first accumulated discharge amount, the second charge state and the second accumulated discharge amount of each battery cluster.
In the technical scheme disclosed in this embodiment, when at least one battery cluster with full discharge capacity is detected in the battery system, the current first charge state and the first accumulated discharge capacity of each battery cluster are obtained, then each battery cluster is discharged, and when at least one battery cluster with full discharge capacity is detected in the battery system, the current second charge state and the second accumulated discharge capacity of each battery cluster are obtained again, so that when each battery cluster does not reach the full discharge state at the same time, the total battery capacity of each battery cluster can be calculated based on the first charge state, the first accumulated discharge capacity, the second charge state and the second accumulated discharge capacity, namely, the total battery capacity of each battery cluster can be calculated without obtaining the actual full charge/full discharge capacity, and the accuracy of the total battery capacity obtained by calculation is improved.
In addition, the embodiment of the invention also provides a battery system, which comprises a memory, a processor and a capacity calibration program of the battery system, wherein the capacity calibration program of the battery system is stored in the memory and can be run on the processor, and the capacity calibration program of the battery system realizes the steps of the capacity calibration method of the battery system in each embodiment when being executed by the processor.
In addition, the embodiment of the invention also provides a readable storage medium, wherein the readable storage medium stores a capacity calibration program of a battery system, and the capacity calibration program of the battery system realizes the steps of the capacity calibration method of the battery system according to the above embodiments when being executed by a processor.
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 one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a battery system (which may be a PC or the like) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (9)
1. A method for calibrating the capacity of a battery system, wherein the battery system comprises at least two groups of parallel battery clusters, the method comprising the steps of:
When the battery clusters with the discharging capacity exist in the battery system, acquiring the current first charge state and the first accumulated charge amount of each battery cluster;
charging each of the battery clusters in the battery system;
when detecting that the battery clusters with full charge exist in the battery system, acquiring a current second charge state and a second accumulated charge of each battery cluster;
generating a total battery capacity of each of the battery clusters according to the first state of charge, the first accumulated charge, the second state of charge, and the second accumulated charge of each of the battery clusters;
the step of generating a total battery capacity of each of the battery clusters from the first state of charge, the first accumulated charge, the second state of charge, and the second accumulated charge of each of the battery clusters includes:
determining a state of charge change value for each of the battery clusters based on a difference between the second state of charge and the first state of charge of each of the battery clusters;
determining an actual charge amount of each of the battery clusters according to a difference between the second accumulated charge amount and the first accumulated charge amount of each of the battery clusters;
And determining the total battery capacity of each battery cluster according to the ratio between the state of charge change value and the actual charge of each battery cluster.
2. The capacity calibration method of claim 1, wherein the step of obtaining the current first state of charge and the first accumulated charge of each of the battery clusters includes:
acquiring a current first initial charge state of each battery cluster;
calibrating the first initial state of charge according to the current operation parameters of each battery cluster, and taking the calibrated state of charge as a first state of charge;
acquiring a current first accumulated charge amount of each battery cluster;
the step of obtaining the current second state of charge and the second accumulated charge of each battery cluster includes:
acquiring a current second initial charge state of each battery cluster;
calibrating the second initial state of charge according to the current operation parameters of each battery cluster, and taking the calibrated state of charge as a second state of charge;
acquiring a current second accumulated charge amount of each battery cluster;
the current operation parameters comprise the current extreme single voltage of the battery cluster.
3. The method of calibrating capacity of a battery system according to claim 1, wherein the step of charging each of the battery clusters in the battery system further comprises, after:
when detecting that a discharge current exists in the battery system, acquiring the current residual capacity of each battery cluster;
and judging whether the battery cluster with the zero residual capacity exists, wherein when the battery cluster with the zero residual capacity exists in the battery system, judging that the battery cluster with the full charge exists in the battery system.
4. The method for calibrating the capacity of a battery system according to claim 3, wherein after the step of obtaining the current remaining capacity of each of the battery clusters, further comprising:
when no battery cluster with zero residual capacity exists in the battery system, acquiring a second charge state of each battery cluster in an OCV_SOC calibration mode;
acquiring a second accumulated charge amount of each of the battery clusters;
generating a total battery capacity of each of the battery clusters according to the first state of charge, the first accumulated charge, the second state of charge, and the second accumulated charge of each of the battery clusters.
5. The capacity calibration method of a battery system as set forth in claim 3, wherein the step of acquiring the current remaining capacity of each of the battery clusters upon detecting the presence of a discharge current in the battery system comprises:
acquiring the temperature of each battery cluster when the existence of discharge current in the battery system is detected;
when the battery clusters with the temperature exceeding a preset temperature interval do not exist, acquiring the current residual capacity of each battery cluster;
and outputting prompt information of calibration errors when the battery cluster with the temperature exceeding the preset temperature interval exists.
6. The method of calibrating capacity of a battery system according to claim 1, wherein the step of acquiring a current first state of charge and a first accumulated charge of each of the battery clusters when the battery clusters of a discharged amount exist in the battery system, further comprises:
judging whether the battery clusters with the discharging capacity exist in the battery system or not;
when the battery clusters with the discharging capacity do not exist in the battery system, acquiring the current first charge state of each battery cluster in an OCV_SOC calibration mode;
acquiring a current first accumulated charge amount of each battery cluster;
The step of charging each of the battery clusters in the battery system is performed.
7. A method for calibrating the capacity of a battery system, wherein the battery system comprises at least two groups of parallel battery clusters, the method comprising the steps of:
when the battery clusters with full charge exist in the battery system, acquiring the current first charge state and the first accumulated discharge amount of each battery cluster;
controlling discharge of each of the battery clusters in the battery system;
when the battery clusters with the discharging capacity in the battery system are detected, acquiring the current second charge state and the second accumulated discharging capacity of each battery cluster;
generating a total battery capacity of each battery cluster according to the first charge state, the first accumulated discharge amount, the second charge state and the second accumulated discharge amount of each battery cluster;
the step of generating a total battery capacity of each of the battery clusters from the first state of charge, the first accumulated amount of discharge, the second state of charge, and the second accumulated amount of discharge of each of the battery clusters includes:
Determining a state of charge change value for each of the battery clusters based on a difference between the second state of charge and the first state of charge of each of the battery clusters;
determining the actual discharge amount of each battery cluster according to the difference value between the second accumulated discharge amount and the first accumulated discharge amount of each battery cluster;
and determining the total battery capacity of each battery cluster according to the ratio between the state of charge change value and the actual discharge amount of each battery cluster.
8. A battery system, the battery system comprising: at least two battery clusters, a memory, a processor and a capacity calibration program of a battery system stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the capacity calibration method of a battery system according to any one of claims 1 to 7.
9. A readable storage medium, characterized in that the readable storage medium has stored thereon a capacity calibration program of a battery system, which when executed by a processor, implements the steps of the capacity calibration method of a battery system according to any one of claims 1 to 7.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004031012A (en) * | 2002-06-24 | 2004-01-29 | Nissan Motor Co Ltd | Capacity adjusting device and method for battery pack |
| WO2013008397A1 (en) * | 2011-07-08 | 2013-01-17 | Ｎｅｃエナジーデバイス株式会社 | Battery pack, charging control system and charging method |
| CN103364736A (en) * | 2013-07-17 | 2013-10-23 | 王凯敏 | Method for calculating RAC (residual available capacity) of lithium ion battery pack |
| CN103942133A (en) * | 2014-03-20 | 2014-07-23 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN107748336A (en) * | 2017-11-06 | 2018-03-02 | 清华大学 | The state-of-charge On-line Estimation method and system of lithium ion battery |
| CN109633476A (en) * | 2018-12-25 | 2019-04-16 | 上海电气分布式能源科技有限公司 | The appraisal procedure and system of the health degree of battery energy storage system |
| CN110133535A (en) * | 2019-06-21 | 2019-08-16 | 阳光电源股份有限公司 | The SOH value of battery system determines method and device |
| CN110954833A (en) * | 2018-09-25 | 2020-04-03 | 比亚迪股份有限公司 | Method and device for acquiring battery capacity and vehicle |
| CN112083336A (en) * | 2020-10-19 | 2020-12-15 | 哈尔滨工业大学（威海） | Lithium ion battery pack electrochemical model parameter acquisition method |
| CN112147524A (en) * | 2019-06-28 | 2020-12-29 | 比亚迪股份有限公司 | Battery capacity calibration method and device, storage medium and electronic equipment |
| CN112305432A (en) * | 2020-09-18 | 2021-02-02 | 傲普(上海)新能源有限公司 | SOC calibration method for large energy storage system battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3743704B2 (en) * | 2000-09-25 | 2006-02-08 | Ｎｅｃトーキン栃木株式会社 | Battery pack |
-
2021
- 2021-04-09 CN CN202110387033.6A patent/CN113138343B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004031012A (en) * | 2002-06-24 | 2004-01-29 | Nissan Motor Co Ltd | Capacity adjusting device and method for battery pack |
| WO2013008397A1 (en) * | 2011-07-08 | 2013-01-17 | Ｎｅｃエナジーデバイス株式会社 | Battery pack, charging control system and charging method |
| CN103364736A (en) * | 2013-07-17 | 2013-10-23 | 王凯敏 | Method for calculating RAC (residual available capacity) of lithium ion battery pack |
| CN103942133A (en) * | 2014-03-20 | 2014-07-23 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN107748336A (en) * | 2017-11-06 | 2018-03-02 | 清华大学 | The state-of-charge On-line Estimation method and system of lithium ion battery |
| CN110954833A (en) * | 2018-09-25 | 2020-04-03 | 比亚迪股份有限公司 | Method and device for acquiring battery capacity and vehicle |
| CN109633476A (en) * | 2018-12-25 | 2019-04-16 | 上海电气分布式能源科技有限公司 | The appraisal procedure and system of the health degree of battery energy storage system |
| CN110133535A (en) * | 2019-06-21 | 2019-08-16 | 阳光电源股份有限公司 | The SOH value of battery system determines method and device |
| CN112147524A (en) * | 2019-06-28 | 2020-12-29 | 比亚迪股份有限公司 | Battery capacity calibration method and device, storage medium and electronic equipment |
| CN112305432A (en) * | 2020-09-18 | 2021-02-02 | 傲普(上海)新能源有限公司 | SOC calibration method for large energy storage system battery |
| CN112083336A (en) * | 2020-10-19 | 2020-12-15 | 哈尔滨工业大学（威海） | Lithium ion battery pack electrochemical model parameter acquisition method |
Non-Patent Citations (2)
| Title |
|---|
| 吴佳祥 ; .基于安时法的磷酸铁锂电池荷电状态校正.山东交通学院学报.2015,(第03期),正文. * |
| 基于安时法的磷酸铁锂电池荷电状态校正;吴佳祥;;山东交通学院学报(第03期);正文 * |
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