CN117559010A - Power control device and method of energy storage system, storage medium and energy storage system - Google Patents

Power control device and method of energy storage system, storage medium and energy storage system Download PDF

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Publication number
CN117559010A
CN117559010A CN202311533249.4A CN202311533249A CN117559010A CN 117559010 A CN117559010 A CN 117559010A CN 202311533249 A CN202311533249 A CN 202311533249A CN 117559010 A CN117559010 A CN 117559010A
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China
Prior art keywords
energy storage
storage system
power
target parameter
parameters
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CN202311533249.4A
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Chinese (zh)
Inventor
靳旭哲
赵国军
喻春华
陈静
吴锦洋
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Zhejiang Qichen Xinneng Technology Co ltd
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Zhejiang Qichen Xinneng Technology Co ltd
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Priority to CN202311533249.4A priority Critical patent/CN117559010A/en
Publication of CN117559010A publication Critical patent/CN117559010A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • 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
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The disclosure provides a power control device, a method, a storage medium and an energy storage system of an energy storage system, and relates to the field of energy management, wherein the device comprises: acquiring parameters of an energy storage system, wherein the parameters comprise voltage, temperature, internal resistance and voltage range of the energy storage system; and sequentially comparing the parameters with the parameter threshold ranges according to the priority order of the parameters, wherein if the target parameters meet the target parameter threshold ranges, the parameters and the parameter threshold ranges are in one-to-one correspondence, and the output power of the energy storage system is controlled through a target parameter power mapping relation, wherein the target parameters meet the target parameter threshold ranges for the first time in the sequential comparison process, the target parameter power mapping relation corresponds to the target parameters, and the target parameter power mapping relation is used for recording the mapping relation between the target parameters and the output power value of the energy storage system. The power output mode of the energy storage system can be determined through the priority order of the parameters, and negative effects caused by battery degradation can be effectively reduced.

Description

Power control device and method of energy storage system, storage medium and energy storage system
Technical Field
The disclosure relates to the field of energy management, and in particular relates to a power control device and method of an energy storage system, a storage medium and the energy storage system.
Background
In current energy management, power control of an energy storage system is distributed and controlled according to time, for example, at 12 points, the energy storage system outputs certain power; by point 13, the energy storage system outputs another corresponding power. However, as the usage time increases, the battery in the energy storage system may deteriorate or the parameters of the battery may be abnormal, affecting the normal output of the energy storage system.
Disclosure of Invention
The present disclosure provides a power control device, a method, a storage medium and an energy storage system of an energy storage system, so as to at least solve the above technical problems in the prior art.
According to a first aspect of the present disclosure, there is provided a power control device of an energy storage system, the device comprising:
the parameter acquisition module is used for acquiring parameters of the energy storage system, wherein the parameters comprise voltage, temperature, internal resistance and voltage range of the energy storage system;
the parameter comparison module is used for sequentially comparing the parameters with the parameter threshold ranges according to the priority order of the parameters, wherein the parameters and the parameter threshold ranges are in one-to-one correspondence;
the power control module is used for controlling the output power of the energy storage system through a target parameter power mapping relation if a target parameter meets a target parameter threshold range, wherein the target parameter is the parameter which meets the target parameter threshold range for the first time in the process of sequential comparison, the target parameter power mapping relation corresponds to the target parameter, and the target parameter power mapping relation is used for recording the mapping relation between the target parameter and the output power value of the energy storage system.
In one embodiment, the priority order of the parameters is from high to low, the temperature, the internal resistance, and the voltage are extremely poor.
In an embodiment, the parameter comparison module is further configured to sequentially compare the voltage range and the voltage range threshold, the internal resistance and the internal resistance threshold, the temperature and the temperature threshold, and the voltage threshold according to a priority order of the parameters.
In an embodiment, the power control module is further configured to cancel controlling the output power of the energy storage system according to the target parameter power mapping relationship and control the output power of the energy storage system according to a time power mapping relationship, where the time power mapping relationship is used for recording a mapping relationship between time and an output power value of the energy storage system, when the target parameter power is detected to not meet the target parameter threshold range.
In an embodiment, the power control module is further configured to control the output power of the energy storage system according to a time power mapping relationship if the target parameter does not satisfy the target parameter threshold range.
In an embodiment, the power control module is further configured to determine an output power value in the target parameter power mapping relationship according to the target parameter; and controlling the output power of the energy storage system according to the output power value.
According to a second aspect of the present disclosure, there is provided a power control method of an energy storage system, the method comprising:
acquiring parameters of an energy storage system, wherein the parameters comprise voltage, temperature, internal resistance and voltage range of the energy storage system;
sequentially comparing the parameters with parameter threshold ranges according to the priority order of the parameters, wherein the parameters and the parameter threshold ranges are in one-to-one correspondence;
and if the target parameter meets the target parameter threshold range, controlling the output power of the energy storage system through a target parameter power mapping relation, wherein the target parameter is the parameter which meets the target parameter threshold range for the first time in the process of sequential comparison, the target parameter power mapping relation corresponds to the target parameter, and the target parameter power mapping relation is used for recording the mapping relation between the target parameter and the output power value of the energy storage system.
In one embodiment, the priority order of the parameters is from high to low, the temperature, the internal resistance, and the voltage are extremely poor.
In one embodiment, the priority order of the parameters is from high to low, the temperature, the internal resistance, and the voltage are extremely poor.
In an embodiment, when the output power of the energy storage system is controlled by the target parameter power mapping relation and it is detected that the target parameter power does not meet the target parameter threshold range, the output power of the energy storage system is not controlled by the target parameter power mapping relation, and the output power of the energy storage system is controlled according to a time power mapping relation, wherein the time power mapping relation is used for recording a mapping relation between time and an output power value of the energy storage system.
In an embodiment, if the target parameter is not satisfied, the output power of the energy storage system is controlled according to a time power mapping relationship.
In one embodiment, determining an output power value in the target parameter power mapping relation according to the target parameter; and controlling the output power of the energy storage system according to the output power value.
According to a third aspect of the present disclosure, there is provided an energy storage device comprising:
at least one battery cluster; the method comprises the steps of,
a current transformer connected to the at least one battery cluster; the method comprises the steps of,
a power controller connected with the converter; wherein,
the power controller stores instructions that are stored for execution by the power controller to enable the energy storage system to perform the methods described in the present disclosure.
According to a fourth aspect of the present disclosure, there is provided a non-transitory computer readable storage medium storing computer instructions for causing an energy storage system to perform the method described in the present disclosure.
According to the power control device, the method, the storage medium and the energy storage system of the energy storage system, the target parameters are selected according to the priority order of the parameters by utilizing the voltage, the temperature, the internal resistance and the voltage range of the energy storage system, and the output power of the energy storage system is controlled through the power mapping relation of the target parameters corresponding to the target parameters. According to the method and the device, the power output mode of the energy storage system can be determined through the priority order of the parameters, and the power output of the energy storage system is adjusted in a mode most suitable for the energy storage system, so that negative effects caused by battery degradation can be effectively reduced.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following specification.
Drawings
The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings, in which:
in the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.
FIG. 1 illustrates a schematic diagram of an implementation model of an energy storage system provided by an embodiment of the present disclosure;
fig. 2 is a schematic implementation flow diagram of a power control method of an energy storage system according to an embodiment of the disclosure;
fig. 3 is a schematic implementation diagram of a parameter power mapping table according to an embodiment of the disclosure;
fig. 4 is a schematic implementation flow diagram of a power control method of an energy storage system according to an embodiment of the disclosure;
fig. 5 illustrates an implementation model schematic diagram of a power control device of an energy storage system according to an embodiment of the disclosure;
fig. 6 shows a schematic diagram of a composition structure of a power controller according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, features and advantages of the present disclosure more comprehensible, the technical solutions in the embodiments of the present disclosure will be clearly described in conjunction with the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. Based on the embodiments in this disclosure, all other embodiments that a person skilled in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.
FIG. 1 illustrates a schematic energy storage system diagram of a power control method of an energy storage system that may be used to implement embodiments of the present disclosure. The energy storage system comprises a battery cluster 101, a current transformer (Power Conversion System, PCS) 102 and a power controller 103.
The battery cluster 101 is a battery assembly formed by single batteries in a serial, parallel or serial-parallel manner. The battery cluster 101 is a device used by the energy storage system to store electrical energy. In some embodiments, the battery cluster 101 belongs to a lithium battery.
The current transformer 102 is a device that varies the power, voltage, frequency, charge, or other electrical characteristics of the energy storage system, and in embodiments of the present disclosure, the current transformer 102 is used to regulate the output power of the energy storage system.
The power controller 103 is configured to control an output power of the energy storage system, the parameter including at least one of a voltage, a temperature, and an internal resistance. In some embodiments, the power controller performs parameter operations and power allocation. Illustratively, the power controller 103 calculates the voltage range of the battery cluster 101 from the voltage; the power controller 103 matches the output power of the energy storage system according to voltage, temperature, internal resistance, and voltage pole. In some embodiments, the power controller 103 sequentially compares the parameters to the parameter threshold ranges according to the priority order of the parameters. In the process of sequential comparison, the power controller 103 determines a target parameter that satisfies the target parameter threshold range for the first time, determines an output power value of the energy storage system according to a target parameter power mapping relationship corresponding to the target parameter, and provides the output power value to the converter 102. The converter 102 adjusts the output power of the overall energy storage system according to the power output value provided by the power controller 103.
In the present disclosure, the energy storage system has a time power control mode, a voltage power control mode, a temperature power control mode, an internal resistance power control mode, and a voltage range power control mode. Wherein,
(1) In the time power control mode, the output power value of the energy storage system is determined according to a time power mapping relationship, and the time power mapping relationship is used for recording the mapping relationship between time and the output power value of the energy storage system.
(2) In the voltage power control mode, the output power value of the energy storage system is determined according to a voltage power mapping relation, and the voltage power mapping relation is used for recording the mapping relation between the voltage of the battery cluster and the output power value of the energy storage system.
(3) In the temperature power control mode, the output power value of the energy storage system is determined according to a temperature power mapping relation, and the temperature power mapping relation is used for recording the mapping relation between the temperature of the battery cluster and the output power value of the energy storage system.
(4) In the temperature power control mode, the output power value of the energy storage system is determined according to a temperature power mapping relation, and the temperature power mapping relation is used for recording the mapping relation between the temperature of the battery cluster and the output power value of the energy storage system.
(5) In the voltage range power control mode, the output power value of the energy storage system is determined according to a voltage range power mapping relationship, and the voltage range power mapping relationship is used for recording the mapping relationship between the voltage range of the battery cluster and the output power value of the energy storage system.
In summary, the present disclosure may be applied to energy management of an energy storage system, and even if a battery cluster is degraded, the degradation degree of a battery may be effectively reduced by converting a power output policy in time, so that the output power of the energy storage system may be effectively controlled.
Fig. 2 is a schematic implementation flow diagram of a power control method of an energy storage system according to an embodiment of the disclosure. The method may be applied to an energy storage system as described in fig. 1, the method comprising:
step S201: parameters of the energy storage system are obtained, wherein the parameters comprise voltage, temperature, internal resistance and voltage range of the energy storage system.
In some embodiments, the voltage of the energy storage system may be obtained by a voltage acquisition device. The temperature of the energy storage system may be obtained by a temperature sensor.
In some embodiments, the internal resistance of the energy storage device may be obtained by calculating a ratio of voltage and current across the energy storage system.
In some embodiments, the voltage range of the energy storage system is calculated from the voltage of the energy storage system. The voltage margin is used to represent the maximum difference between the individual cells in the energy storage system. The voltage range is used to evaluate the performance of the battery cluster, and is related to the operational stability and the service life of the battery pack.
Step S202: and sequentially comparing the parameters with the parameter threshold ranges according to the priority order of the parameters, wherein the parameters and the parameter threshold ranges are in one-to-one correspondence.
In some embodiments, the parameter threshold range includes a parameter upper value and a parameter lower value. The upper parameter limit value and the lower parameter limit value can be adjusted according to actual requirements.
In some embodiments, where the battery cluster in the energy storage system is a lithium battery, the output power of the lithium battery is related to voltage, temperature, internal resistance, and voltage range, wherein the priority order of the parameters is determined according to the importance of the parameters to the battery cluster. Optionally, the priority order of the parameters is from big to small, namely voltage, temperature, internal resistance and extremely poor voltage. It should be noted that the priority order may be adjusted according to actual requirements. For example, the priority order may be from high to low, such as voltage, voltage range, internal resistance, temperature, or internal resistance, voltage, temperature, voltage range, and the like, which will not be described herein.
In some embodiments, the voltage range and the voltage range threshold, the internal resistance and the internal resistance threshold, the temperature and temperature threshold, and the voltage and voltage threshold are compared sequentially according to a priority order of the parameters. For example, the voltage range and the voltage range threshold are preferentially compared, if the voltage range accords with the voltage range threshold, step S203 is directly performed, and if the voltage range does not accord with the voltage range threshold, the internal resistance and the internal resistance threshold range are started to be compared; if the internal resistance accords with the internal resistance threshold range, step S203 is directly performed, and if the internal resistance does not accord with the temperature threshold range, the comparison of the temperature and the temperature threshold range is started, and then the following steps are performed in a similar manner, and the details are not repeated here.
Step S203: if the target parameter meets the target parameter threshold range, controlling the output power of the energy storage system through a target parameter power mapping relation, wherein the target parameter is a parameter which meets the target parameter threshold range for the first time in the sequential comparison process, the target parameter power mapping relation corresponds to the target parameter, and the target parameter power mapping relation is used for recording the mapping relation between the target parameter and the output power value of the energy storage system.
In some embodiments, the target parameter is one of the aforementioned parameters, the target parameter threshold range corresponds to the target parameter, and the target parameter threshold range includes a target parameter upper limit value and a target parameter lower limit value. If the target parameter is greater than the target parameter lower limit value and the target parameter is less than the target parameter upper limit value, determining that the target parameter meets the target parameter threshold range. And if the target parameter is smaller than the target parameter lower limit value or the target parameter is larger than the target parameter upper limit value, determining that the target parameter does not meet the target parameter threshold range.
In some embodiments, the target parameter power mapping is one of the parameter power mappings. The parameter power mapping relation comprises a voltage power mapping relation, a temperature power mapping relation, an internal resistance power mapping relation and a voltage range power mapping relation.
Optionally, the parameter power mapping relationship further includes a time power mapping relationship, where the time power mapping relationship is used to record a mapping relationship between time and an output power value of the energy storage system. In some embodiments, the temporal power map is a basic power output form of the energy storage system, which will be used to control the output power in case no parameter meets the corresponding parameter threshold range, on the one hand, and in case the target parameter no longer meets the corresponding target parameter threshold range, on the other hand.
In some embodiments, in the event that the output power of the energy storage system is controlled by the target parameter power mapping relationship and it is detected that the target parameter power does not meet the target parameter threshold range, the control of the output power of the energy storage system by the target parameter power mapping relationship is canceled, and the control of the output power of the energy storage system is controlled according to the time power mapping relationship.
In some embodiments, the target parameter power mapping relationship includes a target parameter power mapping table and a target parameter power mapping curve. The target parameter power mapping table is used for recording the mapping relation between the discrete form target parameter and the output power value of the energy storage system. The target parameter power mapping curve is used for recording the mapping relation between the continuous form target parameter and the output power value of the energy storage system.
In some embodiments, in the case where the target parameter power mapping relationship employs a target parameter power mapping table, since the target parameter in the target parameter power mapping table is in a discrete form, there may be a case where the target parameter does not have a corresponding value in the target parameter power mapping table, but the target parameter satisfies the target parameter threshold range. Optionally, determining an associated parameter closest to the target parameter in the target parameter power mapping table; determining an output power value in a target parameter power mapping relation according to the association parameter; and controlling the output power of the energy storage system according to the output power value. For example, the target parameter is a voltage of 10.7V, the target parameter power map includes parameters of 10V and 11V, and then 11V closest to 10.7V is selected as the associated parameter.
In some embodiments, the output power value is determined in a target parameter power mapping relationship according to the target parameter; and controlling the output power of the energy storage system according to the output power value.
For example, please refer to fig. 3, fig. 3 shows a schematic diagram of a parameter power mapping relationship provided in an embodiment of the disclosure. It should be noted that, in the present disclosure, each parameter has a corresponding parameter power mapping relationship, so the parameter power mapping relationship includes a voltage power mapping relationship, a temperature power mapping relationship, an internal resistance and a voltage range power mapping relationship. Fig. 3 shows an alternative parameter power mapping relationship, where information is recorded in the form of a mapping table, for example, a target parameter 1 corresponds to a power output value 1, and a target parameter 2 corresponds to a power output value 2.
In summary, the present disclosure uses the voltage, the temperature, the internal resistance and the voltage range of the energy storage system to select the target parameters according to the priority order of the foregoing parameters, and controls the output power of the energy storage system according to the target parameter power mapping relationship corresponding to the target parameters. According to the method and the device, the power output mode of the energy storage system can be determined through the priority order of the parameters, and the power output of the energy storage system is adjusted in a mode most suitable for the energy storage system, so that negative effects caused by battery degradation can be effectively reduced.
Fig. 4 is a schematic implementation flow diagram of a power control method of an energy storage system according to an embodiment of the disclosure. The method may be applied to an energy storage system as described in fig. 1, the method comprising:
step S401: and controlling the output power through the time power mapping relation.
In some embodiments, the time power map is used to record a map between time and an output power value of the energy storage system. When the output power is controlled by the time power map, the energy storage system is in a time power control mode.
Step S402: the priority order of the parameters is determined.
In some embodiments, the priority order of the parameters is from big to small voltage, temperature, internal resistance, voltage very bad. The priority order of the parameters can be adjusted according to actual demands, and the disclosure describes a battery cluster in an energy storage system by using lithium batteries.
Step S403: whether the voltage range satisfies a voltage range threshold is detected.
If the voltage range satisfies the voltage range threshold, step S404 is executed;
if the voltage range does not satisfy the voltage range threshold, step S405 is performed.
In some embodiments, the range of voltage range thresholds includes an upper voltage range limit and a lower voltage range limit. If the voltage range is larger than the lower limit value of the voltage range and the voltage range is smaller than the upper limit value of the voltage range, determining that the voltage range meets the threshold range of the voltage range. If the voltage range is smaller than the lower limit value of the voltage range or the voltage range is larger than the upper limit value of the voltage range, determining that the voltage range does not meet the threshold range of the voltage range.
Step S404: and determining an output power value in the voltage range power mapping relation.
In some embodiments, the determination of the output power value is continued in the voltage range power map until the voltage range does not satisfy the voltage range threshold range, and step S412 is performed.
Step S405: and detecting whether the internal resistance meets the internal resistance threshold range.
If the internal resistance meets the internal resistance threshold range, executing step S406;
if the internal resistance does not satisfy the internal resistance threshold range, step S407 is performed.
In some embodiments, the internal resistance threshold range includes an internal resistance upper limit and an internal resistance lower limit. If the internal resistance is greater than the internal resistance lower limit value and the internal resistance is less than the internal resistance upper limit value, determining that the internal resistance meets the internal resistance threshold range. If the internal resistance is smaller than the internal resistance lower limit value or the internal resistance is larger than the internal resistance upper limit value, determining that the internal resistance does not meet the internal resistance threshold range.
Step S406: and determining an output power value in the internal resistance power mapping relation.
In some embodiments, the determination of the output power value is continued in the internal resistance power map until the internal resistance does not satisfy the internal resistance threshold range, and step S412 is performed.
Step S407: whether the temperature satisfies a temperature threshold range is detected.
If the temperature satisfies the temperature threshold range, executing step S408;
if the temperature does not satisfy the temperature threshold range, step S409 is performed.
In some embodiments, the temperature threshold range includes an upper temperature limit and a lower temperature limit. If the temperature is greater than the lower temperature limit and the temperature is less than the upper temperature limit, determining that the temperature meets the temperature threshold range. If the temperature is less than the lower temperature limit or the temperature is greater than the upper temperature limit, it is determined that the temperature does not satisfy the temperature threshold range.
Step S408: the output power value is determined in the temperature power map.
In some embodiments, the determination of the output power value is continued in the temperature power map until the temperature does not meet the temperature threshold range, step S412 is performed.
Step S409: whether the voltage satisfies a voltage threshold range is detected.
If the voltage meets the voltage threshold range, step S410 is performed;
if the voltage does not meet the voltage threshold range, step S412 is performed.
In some embodiments, the voltage threshold range includes an upper voltage limit and a lower voltage limit. If the voltage is greater than the voltage lower limit and the voltage is less than the voltage upper limit, determining that the voltage meets the voltage threshold range. If the voltage is less than the lower voltage limit or the voltage is greater than the upper voltage limit, determining that the voltage does not meet the voltage threshold range.
Step S410: the output power value is determined in a voltage power map.
In some embodiments, the determination of the output power value is continued in the voltage power map until the voltage does not meet the voltage threshold range, step S412 is performed.
Step S411: and sending the output power value to the converter, so that the converter adjusts the power output of the energy storage system according to the output power value.
Step S412: returning to the time power control mode.
In summary, the present disclosure uses the voltage, the temperature, the internal resistance and the voltage range of the energy storage system to select the target parameters according to the priority order of the foregoing parameters, and controls the output power of the energy storage system according to the target parameter power mapping relationship corresponding to the target parameters. According to the method and the device, the power output mode of the energy storage system can be determined through the priority order of the parameters, and the power output of the energy storage system is adjusted in a mode most suitable for the energy storage system, so that negative effects caused by battery degradation can be effectively reduced.
Fig. 5 illustrates an implementation model schematic diagram of a power control device of an energy storage system according to an embodiment of the disclosure. The device comprises:
a parameter obtaining module 501, configured to obtain parameters of the energy storage system, where the parameters include voltage, temperature, internal resistance, and voltage range of the energy storage system;
a parameter comparison module 502, configured to sequentially compare the parameter with a parameter threshold range according to a priority order of the parameter, where the parameter corresponds to the parameter threshold range one by one;
the power control module 503 is configured to control, if there is a target parameter that satisfies a target parameter threshold range, an output power of the energy storage system according to a target parameter power mapping relationship, where the target parameter is the parameter that satisfies the target parameter threshold range for the first time in a sequential comparison process, the target parameter power mapping relationship corresponds to the target parameter, and the target parameter power mapping relationship is used to record a mapping relationship between the target parameter and an output power value of the energy storage system.
In one embodiment, the priority order of the parameters is from high to low, the temperature, the internal resistance, and the voltage are extremely poor.
In an embodiment, the parameter comparison module 502 is further configured to sequentially compare the voltage range and the voltage range threshold, the internal resistance and the internal resistance threshold range, the temperature and the temperature threshold range, and the voltage threshold range according to a priority order of the parameters.
In an embodiment, the power control module 503 is further configured to cancel controlling the output power of the energy storage system according to the target parameter power mapping relationship and control the output power of the energy storage system according to a time power mapping relationship, where the time power mapping relationship is used for recording a mapping relationship between time and an output power value of the energy storage system, when the target parameter power does not meet the target parameter threshold range.
In an embodiment, the power control module 503 is further configured to control the output power of the energy storage system according to a time power mapping relationship if the target parameter does not satisfy the target parameter threshold range.
In an embodiment, the power control module 503 is further configured to determine an output power value in the target parameter power mapping relationship according to the target parameter; and controlling the output power of the energy storage system according to the output power value.
In summary, the present disclosure uses the voltage, the temperature, the internal resistance and the voltage range of the energy storage system to select the target parameters according to the priority order of the foregoing parameters, and controls the output power of the energy storage system according to the target parameter power mapping relationship corresponding to the target parameters. According to the method and the device, the power output mode of the energy storage system can be determined through the priority order of the parameters, and the power output of the energy storage system is adjusted in a mode most suitable for the energy storage system, so that negative effects caused by battery degradation can be effectively reduced.
According to embodiments of the present disclosure, the present disclosure also provides a power controller and a readable storage medium.
Fig. 6 shows a schematic block diagram of an example power controller 600 that may be used to implement embodiments of the present disclosure. The power controller is intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The power controller may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the disclosure described and/or claimed herein.
As shown in fig. 6, the apparatus 600 includes a computing unit 601 that can perform various appropriate actions and processes according to a computer program stored in a Read Only Memory (ROM) 602 or a computer program loaded from a storage unit 608 into a Random Access Memory (RAM) 603. In the RAM 603, various programs and data required for the operation of the device 600 may also be stored. The computing unit 601, ROM 602, and RAM 603 are connected to each other by a bus 604. An input/output (I/O) interface 605 is also connected to bus 604.
Various components in the device 600 are connected to the I/O interface 605, including: an input unit 606 such as a keyboard, mouse, etc.; an output unit 607 such as various types of displays, speakers, and the like; a storage unit 608, such as a magnetic disk, optical disk, or the like; and a communication unit 609 such as a network card, modem, wireless communication transceiver, etc. The communication unit 609 allows the device 600 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The computing unit 601 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of computing unit 601 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various computing units running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 601 performs the various methods and processes described above, such as the power control method of the energy storage system. For example, in some embodiments, the power control method of the energy storage system may be implemented as a computer software program tangibly embodied on a machine-readable medium, such as the storage unit 608. In some embodiments, part or all of the computer program may be loaded and/or installed onto the device 600 via the ROM 602 and/or the communication unit 609. When the computer program is loaded into RAM 603 and executed by the computing unit 601, one or more steps of the power control method of the energy storage system described above may be performed. Alternatively, in other embodiments, the computing unit 601 may be configured to perform the power control method of the energy storage system in any other suitable way (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus such that the program code, when executed by the processor or controller, causes the functions/operations specified in the flowchart and/or block diagram to be implemented. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and pointing device (e.g., a mouse or trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), and the internet.
The computer system may include a client and a server. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server may be a cloud server, a server of a distributed system, or a server incorporating a blockchain.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps recited in the present disclosure may be performed in parallel or sequentially or in a different order, provided that the desired results of the technical solutions of the present disclosure are achieved, and are not limited herein.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it is intended to cover the scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (10)

1. A power control device for an energy storage system, the device comprising:
the parameter acquisition module is used for acquiring parameters of the energy storage system, wherein the parameters comprise voltage, temperature, internal resistance and voltage range of the energy storage system;
the parameter comparison module is used for sequentially comparing the parameters with the parameter threshold ranges according to the priority order of the parameters, wherein the parameters and the parameter threshold ranges are in one-to-one correspondence;
the power control module is used for controlling the output power of the energy storage system through a target parameter power mapping relation if a target parameter meets a target parameter threshold range, wherein the target parameter is the parameter which meets the target parameter threshold range for the first time in the process of sequential comparison, the target parameter power mapping relation corresponds to the target parameter, and the target parameter power mapping relation is used for recording the mapping relation between the target parameter and the output power value of the energy storage system.
2. The apparatus of claim 1, wherein the priority order of the parameters is from large to small, the voltage, the temperature, the internal resistance, and the voltage are very poor.
3. The apparatus of claim 2, wherein the device comprises a plurality of sensors,
the parameter comparison module is further used for sequentially comparing the voltage range with the voltage range threshold, the internal resistance and the internal resistance threshold, the temperature and the temperature threshold and the voltage threshold according to the priority order of the parameters.
4. A device according to any one of claims 1 to 3,
the power control module is further configured to cancel control of the output power of the energy storage system by the target parameter power mapping relationship and control the output power of the energy storage system according to a time power mapping relationship, where the time power mapping relationship is used for recording a mapping relationship between time and an output power value of the energy storage system, when the target parameter power is detected not to meet the target parameter threshold range.
5. A method according to any one of claim 1 to 3, wherein,
and the power control module is further used for controlling the output power of the energy storage system according to the time power mapping relation if the target parameter is not satisfied and the target parameter threshold range is not satisfied.
6. A device according to any one of claims 1 to 3,
the power control module is further configured to determine an output power value in the target parameter power mapping relationship according to the target parameter;
the power control module is further configured to control output power of the energy storage system according to the output power value.
7. A method of power control of an energy storage system, the method comprising:
acquiring parameters of an energy storage system, wherein the parameters comprise voltage, temperature, internal resistance and voltage range of the energy storage system;
sequentially comparing the parameters with parameter threshold ranges according to the priority order of the parameters, wherein the parameters and the parameter threshold ranges are in one-to-one correspondence;
and if the target parameter meets the target parameter threshold range, controlling the output power of the energy storage system through a target parameter power mapping relation, wherein the target parameter is the parameter which meets the target parameter threshold range for the first time in the process of sequential comparison, the target parameter power mapping relation corresponds to the target parameter, and the target parameter power mapping relation is used for recording the mapping relation between the target parameter and the output power value of the energy storage system.
8. The method of claim 7, wherein the priority order of the parameters is from large to small, the voltage, the temperature, the internal resistance, and the voltage are extremely poor.
9. An energy storage system, comprising:
at least one battery cluster; the method comprises the steps of,
a current transformer connected to the at least one battery cluster; the method comprises the steps of,
a power controller connected with the converter; wherein,
the power controller stores instructions for execution by the power controller to enable the energy storage system to perform the method of any one of claims 1-6.
10. A computer readable storage medium storing computer instructions for causing an energy storage system to perform the method of any one of claims 7 or 8.
CN202311533249.4A 2023-11-16 2023-11-16 Power control device and method of energy storage system, storage medium and energy storage system Pending CN117559010A (en)

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