WO2023236616A1 - 调节系统及其储能系统、调节方法 - Google Patents
调节系统及其储能系统、调节方法 Download PDFInfo
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- WO2023236616A1 WO2023236616A1 PCT/CN2023/082327 CN2023082327W WO2023236616A1 WO 2023236616 A1 WO2023236616 A1 WO 2023236616A1 CN 2023082327 W CN2023082327 W CN 2023082327W WO 2023236616 A1 WO2023236616 A1 WO 2023236616A1
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- power converter
- battery cluster
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- 238000004146 energy storage Methods 0.000 title claims abstract description 34
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- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 238000012986 modification Methods 0.000 abstract description 5
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- 238000010586 diagram Methods 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 6
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- 238000007599 discharging Methods 0.000 description 4
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- 230000033228 biological regulation Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
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Classifications
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- this application provides an adjustment system, which is used to adjust a battery system.
- the battery system includes a plurality of battery clusters; the adjustment system includes a first power converter and a control unit.
- the first power converter The first end is used to be connected in series with each battery cluster, the second end of the first power converter is used to connect to the power source, the control unit is communicatively connected to the first power converter and each battery cluster respectively; the control unit is used to Disconnect the parallel connection between the target battery cluster and other battery clusters, and control the connection between the target battery cluster and the first power converter to be conductive.
- the regulating system further includes a plurality of first controllable switches and a plurality of second controllable switches; wherein the number of first controllable switches and second controllable switches is the same as the number of battery clusters;
- Each battery cluster is connected in series with a first controllable switch and then connected in parallel with other battery clusters.
- Each battery cluster is connected in series with the first power converter through a second controllable switch; the control unit is used to control the first power converter connected to the target battery cluster.
- the controllable switch is disconnected to disconnect the parallel connection between the target battery cluster and other battery clusters; and the second controllable switch between the target battery cluster and the first power converter is controlled to control the target battery cluster and the first power converter.
- the connection between the power converters is conductive.
- the target battery cluster can be switched between parallel connection with other battery clusters and series connection with the first power converter, so that when adjusting the target battery cluster, it can be realized through simple switch control. Adjust switching control to simplify circuit design and save design and device costs on the basis of realizing functions.
- the second terminal of the first power converter is connected in parallel with any one of the plurality of battery clusters, so that the battery cluster connected in parallel with the second terminal of the first power converter is used as the power source.
- a parallel battery cluster is used as a power source, thereby saving the device cost of the power source.
- this application provides an energy storage system.
- the energy storage system includes a battery system and the regulating system of any optional embodiment in the first aspect.
- the battery system includes a plurality of battery clusters and a second power converter, Multiple battery clusters are connected in parallel and connected to the second power converter.
- the first end of the first power converter is connected in series with each battery cluster.
- the second end of the first power converter is used to connect to the power source.
- the control unit is connected to The first power converter is communicatively connected to each battery cluster.
- the first power converter is designed to be connected in series with each battery cluster in the battery system
- the control unit is designed to communicate with the first power converter and each battery cluster, and then disconnect the target battery cluster.
- parallel connection with other battery clusters and controls the connection between the target battery cluster and the first power converter, so that the target battery cluster is adjusted according to the target current command through the first power converter, so that the target battery cluster
- the state of charge is close to the target state of charge, that is, close to the state of charge of other battery clusters, thereby eliminating the difference in state of charge between the target battery cluster and other battery clusters, thereby improving the constant power operation capability of the energy storage system; and this solution
- Multiple battery clusters share a first power converter, which has low device cost, low cost for heat dissipation, no need to modify the existing battery system, and low modification cost.
- the application provides an adjustment method.
- the adjustment method includes: disconnecting the parallel connection between the target battery cluster and other battery clusters, and controlling the connection between the target battery cluster and the first power converter; A power converter sends a target current command to adjust the target battery cluster according to the target current command through the first power converter.
- this solution disconnects the parallel connection between the target battery cluster and other battery clusters, and controls the connection between the target battery cluster and the first power converter to conduct, and to control the conduction of the connection between the target battery cluster and the first power converter.
- the converter sends the target current command, thereby adjusting the target battery cluster according to the target current command through the first power converter, so that the state of charge of the target battery cluster is close to the target state of charge, that is, close to the state of charge of other battery clusters, thereby eliminating the target
- the difference in state of charge between a battery cluster and other battery clusters improves the constant power operation capability of the energy storage system.
- the method before disconnecting the parallel connection between the target battery cluster and other battery clusters, the method further includes: collecting the state of charge of each battery cluster; comparing the state of charge of each battery cluster with the target charge Compare the states and determine that the battery cluster whose relationship between the state of charge and the target state of charge satisfies the preset relationship is the target battery cluster.
- determining the battery cluster whose relationship between the state of charge and the target state of charge satisfies a preset relationship as the target battery cluster includes: determining the battery cluster with the largest difference between the state of charge and the target state of charge as the target battery cluster. .
- the battery cluster with the largest absolute value of the difference between the state of charge and the target state of charge is the target battery cluster, thereby adjusting the battery cluster with the largest SOC difference among multiple battery clusters, which can effectively eliminate SOC in the battery system. differences, effectively improving the output power of the battery system.
- the method before sending the target current command to the first power converter, the method further includes: calculating the difference between the state of charge of the target battery cluster and the target state of charge, obtaining the state of charge difference; calculating the target The current current value of the battery cluster; the target adjustment current value is calculated based on the difference in state of charge and the current current value; the target current command is generated based on the target adjustment current value.
- This implementation method accurately calculates the target adjustment current value through the difference between the state of charge and the current current value of the target battery cluster, and then generates the target current command based on the target adjustment current value, thereby accurately controlling the first power converter's response to the target battery cluster. Adjustment makes the SOC adjustment of the target battery cluster more accurate.
- calculating the current current value of the target battery cluster includes: obtaining the bus voltage, the voltage of the first power converter, the battery voltage of the target battery cluster, and the impedance of the target battery cluster; calculating the bus voltage and the first power converter Calculate the difference between the voltage of the device and the battery voltage of the target battery cluster to obtain the current voltage difference; calculate the quotient of the current voltage difference and the impedance of the target battery cluster to obtain the current current value of the target battery cluster.
- the method before sending the target current command to the first power converter, the method further includes: calculating the difference between the state of charge of the target battery cluster and the target state of charge, obtaining the state of charge difference; calculating the target The current current value of the battery cluster; obtain the current working status of the battery system; determine the target adjustment current value based on the current working status, the difference in state of charge and the current current value of the target battery cluster; generate the target current instruction based on the target adjustment current value.
- determining the target adjustment current value based on the current working state, the state of charge difference and the current current value of the target battery cluster includes: determining the target adjustment coefficient based on the current working state and the state of charge difference; calculating the target adjustment The product of the coefficient and the current current value of the target battery cluster is used to obtain the target regulation current value.
- determining the target adjustment coefficient based on the difference between the current working state and the state of charge includes: when the current working state of the battery system is charging and the difference in state of charge is greater than 0, determining the target adjustment coefficient to be the first Preset coefficient; when the current working state of the battery system is charging, and the difference in state of charge is less than 0, the target adjustment coefficient is determined to be the second preset coefficient; when the current working state of the battery system is discharge, and the difference in state of charge is When the value is greater than 0, the target adjustment coefficient is determined to be the third preset coefficient; when the current working state of the battery system is discharge and the difference in state of charge is less than 0, the target adjustment coefficient is determined to be the fourth preset coefficient; where, the The first preset coefficient and the fourth preset coefficient are less than 1, and the second preset coefficient and the third preset coefficient are greater than 1.
- the method before disconnecting the parallel connection between the target battery cluster and other battery clusters, the method further includes: before multiple battery clusters are connected in parallel, obtain the battery voltage of each battery cluster; set the battery voltage to meet the preset The battery cluster with parallel connection conditions is determined to be a parallel-connectable battery cluster; multiple parallel-connectable battery clusters are controlled to be connected in parallel.
- battery clusters whose battery voltage meets the preset parallel connection conditions are determined as parallel battery clusters, thereby connecting all parallel-connectable battery clusters in parallel to avoid SOC. The circulating current caused by the parallel connection of battery clusters with excessive differences when powered on, thereby improving the reliability of the battery system.
- determining a battery cluster whose relationship between each battery voltage and the target battery voltage satisfies a preset relationship as a battery cluster that can be connected in parallel includes: setting the difference between the battery voltage and the target battery voltage to be less than a first preset voltage threshold All battery clusters are determined to be parallel-connectable battery clusters; alternative parallel-connectable battery clusters are determined among battery clusters in which the difference between the battery voltage and the target battery voltage is greater than the first preset voltage threshold and less than the second preset voltage threshold; control The first power converter performs voltage compensation on the alternative parallel-connectable battery cluster, so that the alternative parallel-connectable battery cluster becomes a parallel-connectable battery cluster.
- determining alternative parallel-connectable battery clusters in battery clusters in which the difference between the battery voltage and the target battery voltage is greater than the first preset voltage threshold and less than the second preset voltage threshold includes: if the battery voltage is equal to If the number of battery clusters where the difference between the target battery voltage is greater than the first preset voltage threshold and less than the second preset voltage threshold is 1, then the difference between the battery voltage and the target battery voltage is greater than the first preset voltage threshold and less than The battery cluster with the second preset voltage threshold is determined as the candidate parallel-connectable battery cluster; if the difference between the battery voltage and the target battery voltage is greater than the first preset voltage threshold and less than the second preset voltage threshold, the number of battery clusters is multiple , then among the multiple battery clusters whose difference between the battery voltage and the target battery voltage is greater than the first preset voltage threshold and less than the second preset voltage threshold, the battery cluster with the smallest difference between the battery voltage and the target battery voltage is determined as the backup Optional parallel battery clusters available.
- the present application provides a regulating device, which is applied to a regulating system connected to a battery system.
- the battery system includes a plurality of battery clusters and includes: a control module for disconnecting the target battery cluster from other battery clusters. in parallel, and controls the connection between the target battery cluster and the first power converter to be conductive; the sending module is used to send the target current command to the first power converter, so as to control the target battery according to the target current command through the first power converter. Clusters are adjusted.
- this solution disconnects the parallel connection between the target battery cluster and other battery clusters through the control module, controls the conduction of the connection between the target battery cluster and the first power converter, and sends the signal to the third power converter through the sending module.
- a power converter sends a target current command, so that the first power converter adjusts the target battery cluster according to the target current command, so that the state of charge of the target battery cluster is close to the target state of charge, that is, close to the state of charge of other battery clusters, Then the difference in state of charge between the target battery cluster and other battery clusters is eliminated, thereby improving the constant power operation capability of the energy storage system.
- the present application provides an electronic device, including a memory and a processor.
- the memory stores a computer program.
- the processor executes the computer program, it executes the third aspect and any optional aspect of the third aspect. Implement the method described in Ways.
- the present application provides a computer-readable storage medium.
- a computer program is stored on the computer-readable storage medium.
- the computer program executes the third aspect or any of the optional aspects of the third aspect. Implement the method described in Ways.
- the present application provides a computer program product, which, when run on a computer, causes the computer to execute the third aspect and the method in any optional implementation of the third aspect.
- Figure 1 is a first structural schematic diagram of the adjustment system provided by this application.
- FIG. 2 is a second structural schematic diagram of the adjustment system provided by this application.
- FIG. 3 is a third structural schematic diagram of the adjustment system provided by this application.
- Figure 4 is a fourth structural schematic diagram of the adjustment system provided by this application.
- FIG. 5 is a schematic structural diagram of the energy storage system provided by this application.
- Figure 6 is a first flow chart of the adjustment method provided by this application.
- Figure 7 is a second flow chart of the adjustment method provided by this application.
- Figure 10 is a fifth flow chart of the adjustment method provided by this application.
- Figure 11 is a sixth flow chart of the adjustment method provided by this application.
- Figure 13 is a schematic structural diagram of an electronic device provided by this application.
- 1-Regulating system 10-First power converter; 20-Control unit; 2-Battery system; 21-Battery cluster; 22-Second power converter; K-First controllable switch; B-Second controllable switch Switch; C-power source; 3-energy storage system; 1200-control module; 1210-sending module; 1220-acquisition module; 1230-determination module; 1240-calculation module; 1250-generation module; 1260-acquisition module; 13- Electronic equipment; 1301-processor; 1302-memory; 1303-communication bus.
- Batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. As battery application fields continue to expand, its market demand is also expanding.
- the battery cluster with the minimum SOC value has the least power, it will be discharged first and reach the discharge cut-off voltage early, and then After exiting operation, the second power converter cannot continue to discharge at full power according to the designed time, thereby greatly reducing the constant power operation capability of the energy storage system. The same is true for the charging process.
- the current solution is to set up a first power converter in each battery cluster branch, and use the first power converter to balance the SOC between different battery clusters so that the SOC of each battery cluster is equal. , that is, the available power of different battery clusters is always consistent, thus solving the problem of parallel mismatch between different battery clusters.
- a first power converter is connected in series in each branch, which increases the device cost for the design of the energy storage system.
- the original energy storage system The heat dissipation cannot meet the demand, so it may also lead to improvements in heat dissipation design and an increase in heat dissipation costs.
- the adjustment system can sequentially convert different power converters under the control of the adjustment method through multiple battery clusters sharing a first power converter.
- the battery clusters are adjusted to save costs while solving the problem of SOC differences in different battery clusters.
- the present application provides an adjustment system, as shown in Figure 1.
- the adjustment system 1 can adjust the battery system 2.
- the battery system 2 includes multiple battery clusters 21.
- the multiple battery clusters 21 can be as follows:
- the battery cluster shown in FIG. 1 includes battery clusters A1 to battery clusters An. Multiple battery clusters 21 connected in parallel can be used to connect to the second power converter 22 to achieve power output.
- Each battery cluster 21 may include a plurality of batteries 211 connected in series.
- the second power converter 21 may be a DC/AC converter or an inverter, and its function is to convert the DC power supply of the multiple battery clusters 21 connected in parallel. Convert into AC power with stable output voltage and frequency.
- all battery clusters 21 in the battery system 2 are connected in parallel and conducted to transmit electric energy to the second power converter to achieve electric energy output.
- the control unit 20 can detect the state of charge of each battery cluster 21 , when the difference in state of charge is large, the adjustment system 1 performs adjustment.
- the specific adjustment process is: the control unit 20 first determines the target battery cluster that needs to be adjusted among the multiple battery clusters 21, and then disconnects the target battery cluster from other batteries. parallel connection between clusters, and control the connection between the target battery cluster and the first power converter 10 to conduct, so that the first power converter 10 adjusts the target battery cluster according to the target current command, thereby eliminating the target battery cluster
- the SOC difference between other battery clusters improves the power output of the battery system.
- control unit 20 can disconnect the target battery cluster from the first power converter 10 , and then connect the target battery cluster to the first power converter 10 .
- the battery cluster is connected in parallel with other parallel battery clusters to connect to the battery system.
- battery cluster A1 is connected through a first controllable switch K and then connected in parallel with other battery clusters.
- Battery cluster A1 is connected through a second controllable switch B and then connected to the first power converter 10 .
- the control unit 20 can control the first controllable switch K connected to the target battery cluster to disconnect, so that the parallel connection between the target battery cluster and other battery clusters is disconnected, and then controls the connection with the target battery cluster.
- the second controllable switch B of the cluster connection is closed, so that the connection between the target battery cluster and the first power converter 10 is conducted, so that the target battery cluster is regulated through the first power converter 10 .
- the control unit 20 can control the second controllable switch B connected to the target battery cluster to close, thereby disconnecting the target battery cluster from the first power converter 10, and then control the first controllable switch B connected to the target battery cluster.
- the controllable switch K is closed so that the target battery cluster is connected in parallel with other battery clusters.
- the first controllable switch K and the second controllable switch B may use the same controllable switch, or may use different controllable switches.
- both the first controllable switch K and the second controllable switch B can be controlled by a controllable switch such as a thyristor or a thyristor.
- the second terminal of the first power converter 10 may be connected in parallel with any one of the plurality of battery clusters, so that the battery connected in parallel with the second terminal of the first power converter 10 Cluster as power source C.
- the second terminal of the first power converter 10 is connected in parallel with the battery cluster A1 , and then the battery cluster A1 serves as the power source C.
- the control unit can communicate with each battery cluster to obtain information from each battery.
- the state of charge of the cluster in the current state is the SOC.
- the SOC of each battery cluster is compared with the target state of charge (target SOC), so that the battery cluster whose relationship between SOC and target SOC satisfies the preset relationship is determined as the target.
- target SOC target state of charge
- this solution disconnects the parallel connection between the target battery cluster and other battery clusters, controls the connection between the target battery cluster and the first power converter, and controls the conduction of the connection between the target battery cluster and the first power converter.
- Send the target current command so that the first power converter adjusts the target battery cluster according to the target current command, so that the SOC of the target battery cluster is close to the target SOC, thereby basically eliminating the SOC difference between the target battery cluster and other battery clusters, Thereby improving the constant power operation capability of the energy storage system.
- the target battery command can be generated by the target adjustment current, and the target adjustment current can adjust the SOC of the target battery cluster.
- the first power converter can adjust its own output voltage according to the target current command to thereby adjust the SOC of the target battery cluster.
- the line current connected between the first power converter and the target battery cluster is adjusted, thereby adjusting the SOC of the target battery cluster.
- this solution disconnects the parallel connection between the target battery cluster and other battery clusters, controls the connection between the target battery cluster and the first power converter, and sends the target to the first power converter. current command, thereby adjusting the target battery cluster according to the target current command through the first power converter, so that the state of charge of the target battery cluster is close to the target state of charge, that is, close to the state of charge of other battery clusters, thereby eliminating the relationship between the target battery cluster and The difference in state of charge between other battery clusters improves the constant power operation capability of the energy storage system.
- this solution can determine the target battery cluster among multiple battery clusters in the following manner:
- this solution can collect the state of charge of each battery cluster, compare the state of charge of each battery cluster with the target state of charge, and finally determine the difference between the state of charge and the target state of charge.
- the battery cluster with the largest absolute value is the target battery cluster.
- this solution can collect the state of charge of each battery cluster, compare the state of charge of each battery cluster with the target state of charge, and calculate the difference between the state of charge and the target state of charge.
- Battery clusters larger than the preset value are gathered together, and then a battery cluster is randomly selected from the set as the target battery cluster.
- the aforementioned target state of charge may be the average state of charge of all battery clusters, or may be the SOC value of the battery cluster with the smallest SOC or the largest SOC among all battery clusters.
- control unit can send a target current command to the first power converter.
- this solution can be implemented in the following manner Determine and generate the target current instructions, including:
- Step S720 Calculate the target adjustment current value based on the state of charge difference and the current current value.
- Step S730 Generate a target current command according to the target adjustment current value.
- control unit may calculate the difference between the SOC of the target battery cluster and the target SOC to obtain ⁇ SOC.
- the target SOC can be the average SOC of all battery clusters, or the maximum or minimum SOC value of all battery clusters.
- control unit may calculate a current current value of the target battery cluster, where the current current value represents a line current value after the target battery cluster is connected in series with the first power converter.
- control unit of this solution can perform the calculation operations of step S700 and step S710 at the same time, or can execute them in sequence, which is not limited by this solution.
- the current current value of the target battery cluster can be calculated in the following manner, as shown in Figure 8, including:
- Step S800 Obtain the bus voltage, the voltage of the first power converter, the battery voltage of the target battery cluster, and the impedance of the target battery cluster.
- the voltage of the first power converter is the voltage after the first power converter is connected in series with the target battery cluster.
- the battery voltage of the target battery cluster is the voltage after the target battery cluster is connected in series with the first power converter.
- the target The impedance of the battery cluster is the total impedance of the line after the target battery cluster and the first power converter are connected in series.
- the bus voltage, the voltage of the first power converter, and the battery voltage of the target battery cluster can be collected and obtained in real time through the control unit, and the impedance of the target battery cluster can be obtained through query.
- this solution can calculate in advance the relationship between each battery cluster and The total impedance after the first power converter is connected in series, and then the total impedance of each battery cluster and the corresponding battery cluster identification are stored in the control unit, and then the total impedance corresponding to the target battery cluster can be queried through the target battery cluster identification.
- this solution can calculate the target adjustment current value based on the difference in state of charge and the current current value.
- this solution can calculate the adjustable current value f ( ⁇ SOC) of the first power converter based on the output power and adjustment capability of the first power converter combined with the state of charge difference.
- Step S920 Obtain the current working status of the battery system.
- steps S900 and S910 are implemented in the same manner as the aforementioned steps S800 and S810, which will not be described again here.
- the state of charge difference ⁇ SOC and the current current value I of the target battery cluster are calculated.
- this solution can obtain the current working status of the battery system.
- the current working state of the battery system may include charging or discharging. Charging means that all battery clusters in the battery system are in a charging state, and discharging means that all battery clusters in the battery system are in a discharging state.
- the target adjustment coefficient x is determined to be the fourth preset coefficient x 4 .
- the previously described scenarios are all scenarios in which the battery clusters in the battery system are running in parallel.
- This solution also detects and compensates the battery clusters before the battery clusters in the battery system are powered on. This avoids circulating current in the battery system, as shown in Figure 10, including:
- Step S1000 Before multiple battery clusters are connected in parallel, obtain the battery voltage of each battery cluster.
- Step S1010 Determine the battery cluster whose battery voltage meets the preset parallel connection condition as a battery cluster that can be connected in parallel.
- Step S1020 Control multiple parallel-connectable battery clusters to be connected in parallel.
- this solution determines the battery clusters whose battery voltage meets the preset parallel connection conditions as parallel battery clusters based on the battery voltage of each battery cluster, thereby connecting all parallel-connectable battery clusters in parallel. This avoids the circulation current caused by parallel connection of battery clusters with too large SOC differences when powering on, thus improving the reliability of the battery system.
- Step S1100 Determine all battery clusters whose difference between the battery voltage and the target battery voltage is less than the first preset voltage threshold as parallel-connectable battery clusters.
- Step S1120 Control the first power converter to perform voltage compensation on the candidate parallel-connectable battery cluster, so that the candidate parallel-connectable battery cluster becomes a parallel-connectable battery cluster.
- this solution can configure the first preset voltage threshold UA and the second preset voltage threshold UB in advance, where the second voltage threshold UB is greater than the first voltage threshold UA, and the second voltage threshold UB can be configured according to the first voltage threshold UA.
- the voltage regulation capability of the power converter is determined.
- the battery cluster is determined to be a parallel-connectable battery cluster
- the voltage difference between the battery voltage of the battery cluster and the target battery voltage is greater than the first preset voltage threshold UA, it is determined whether the voltage difference between the battery voltage of the battery cluster and the target battery voltage is less than the second preset voltage threshold UB. If is less than the second preset voltage threshold UB, since the first power converter can only compensate one battery cluster, so that the battery voltage of the battery cluster can approach the target battery voltage, thereby participating in parallel connection.
- the battery cluster is determined to be An alternative parallel-connectable battery cluster is selected, and then the first power converter is controlled to perform voltage compensation on the alternative parallel-connectable battery cluster, so that the alternative parallel-connectable battery cluster becomes a parallel-connectable battery cluster.
- the battery cluster with the largest voltage difference between the battery voltage and the target battery voltage is used.
- the battery cluster is determined as an alternative parallel-connectable battery cluster.
- this solution can also be used when the voltage differences between multiple battery voltages and the target battery voltage are greater than the first preset voltage threshold UA. and is smaller than the second preset voltage threshold UB, a battery cluster is randomly selected as an alternative parallel-connectable battery cluster.
- the voltage difference between the battery voltage of the battery cluster and the target battery voltage is greater than the second preset voltage threshold UB, it means that the difference between the battery voltage of the battery cluster and the target battery voltage is too large, and the first power converter cannot adjust. Then the battery cluster will be included in the non-parallel queue.
- Figure 12 shows a schematic structural block diagram of an adjustment device provided by this application. It should be understood that this device corresponds to the method embodiments performed in Figures 6 to 11 and can perform the steps involved in the aforementioned method. The specific functions of this device Please refer to the above description. To avoid repetition, detailed description is appropriately omitted here.
- the device includes at least one software function module that can be stored in a memory in the form of software or firmware or solidified in an operating system (OS) of the device.
- OS operating system
- the device includes: a control module 1200, used to disconnect the parallel connection between the target battery cluster and other battery clusters, and control the connection between the target battery cluster and the first power converter; a sending module 1210, with The target current command is sent to the first power converter, so that the first power converter adjusts the target battery cluster according to the target current command.
- a control module 1200 used to disconnect the parallel connection between the target battery cluster and other battery clusters, and control the connection between the target battery cluster and the first power converter
- a sending module 1210 with The target current command is sent to the first power converter, so that the first power converter adjusts the target battery cluster according to the target current command.
- this solution disconnects the parallel connection between the target battery cluster and other battery clusters through the control module. And control the connection between the target battery cluster and the first power converter, and send the target current command to the first power converter through the sending module, thereby adjusting the target battery cluster according to the target current command through the first power converter , so that the state of charge of the target battery cluster is close to the target state of charge, that is, close to the state of charge of other battery clusters, thereby eliminating the difference in state of charge between the target battery cluster and other battery clusters, thereby improving the constant power operation of the energy storage system ability.
- the device further includes a collection module 1220 for collecting the state of charge of each battery cluster; a determination module 1230 for comparing the state of charge of each battery cluster with the target state of charge. A comparison is performed to determine that the battery cluster whose state of charge meets the preset relationship with the target state of charge is the target battery cluster.
- the determination module 1230 is specifically configured to determine the battery cluster with the largest absolute value of the difference between the state of charge and the target state of charge as the target battery cluster.
- the device also includes a calculation module 1240, used to calculate the difference between the state of charge of the target battery cluster and the target state of charge, obtain the difference in state of charge; calculate the current state of charge of the target battery cluster current value; and, calculate the target adjustment current value according to the state of charge difference and the current current value; and generate a module 1250 for generating a target current instruction according to the target adjustment current value.
- a calculation module 1240 used to calculate the difference between the state of charge of the target battery cluster and the target state of charge, obtain the difference in state of charge; calculate the current state of charge of the target battery cluster current value; and, calculate the target adjustment current value according to the state of charge difference and the current current value; and generate a module 1250 for generating a target current instruction according to the target adjustment current value.
- the calculation module 1240 is specifically used to obtain the bus voltage, the voltage of the first power converter, the battery voltage of the target battery cluster, and the impedance of the target battery cluster; calculate the bus voltage and the first power The difference between the voltage of the converter and the battery voltage of the target battery cluster is used to obtain the current voltage difference; the quotient of the current voltage difference and the impedance of the target battery cluster is calculated to obtain the current current value of the target battery cluster.
- the calculation module 1240 is also used to calculate the difference between the state of charge of the target battery cluster and the target state of charge, to obtain the difference in state of charge; and calculate the current current value of the target battery cluster.
- the device also includes an acquisition module 1260, which is used to acquire the current working status of the battery system; the determination module 1230, which is also used to determine the target adjustment current value based on the current working status, the state of charge difference and the current current value of the target battery cluster. ;
- the generation module 1240 is also used to generate a target current instruction according to the target adjustment current value.
- the determination module 1230 is specifically configured to determine the target adjustment coefficient based on the difference between the current working state and the state of charge; calculate the product of the target adjustment coefficient and the current current value of the target battery cluster to obtain the target adjustment coefficient. current value.
- the determination module 1230 is also specifically configured to determine the target adjustment coefficient as the first preset coefficient when the current working state of the battery system is charging and the state-of-charge difference is greater than 0; When the current working state of the battery system is charging and the difference in state of charge is less than 0, the target adjustment coefficient is determined to be the second preset coefficient; when the current working state of the battery system is discharging and the difference in state of charge is greater than 0 , determine the target adjustment coefficient as the third preset coefficient; when the current working state of the battery system is discharge and the difference in state of charge is less than 0, determine the target adjustment coefficient as the fourth preset coefficient; where, the first preset coefficient and the fourth preset coefficient are less than 1, and the second preset coefficient and the third preset coefficient are greater than 1.
- the acquisition module 1260 is also used to acquire the battery voltage of each battery cluster before multiple battery clusters are connected in parallel; the determination module 1230 is also used to compare each battery voltage with the target The battery cluster whose battery voltage relationship satisfies the preset relationship is determined to be a parallel-connectable battery cluster; the control module 1200 is also used to control multiple parallel-connectable battery clusters to be connected in parallel.
- the determination module 1230 is also specifically configured to determine all battery clusters whose difference between the battery voltage and the target battery voltage is less than the first preset voltage threshold as parallel-connectable battery clusters; when the battery voltage Determine an alternative parallel-connectable battery cluster among the battery clusters whose difference from the target battery voltage is greater than the first preset voltage threshold and less than the second preset voltage threshold; control the first power converter to perform voltage testing on the alternative parallel-connectable battery clusters. Compensation makes the alternative parallel-connectable battery cluster become a parallel-connectable battery cluster.
- the present application provides a computer-readable storage medium.
- a computer program is stored on the computer-readable storage medium.
- the computer program is run by a processor, the method in any of the foregoing optional implementations is executed.
- the storage medium can be implemented by any type of volatile or non-volatile storage device or their combination, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), Erasable Programmable Read Only Memory (Erasable Programmable Read Only Memory, referred to as EPROM), programmable read-only memory (Programmable Red-Only Memory, referred to as PROM), read-only Memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk.
- SRAM static random access memory
- EEPROM Electrically erasable programmable read-only memory
- EPROM Erasable Programmable Read Only Memory
- PROM programmable Read-only memory
- PROM Read-Only Memory
- magnetic memory flash memory
- flash memory magnetic disk or optical disk.
- This application provides a computer program product.
- the computer program product When the computer program product is run on a computer, it causes the computer to execute the method in any optional implementation manner.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
本申请公开了一种调节系统及其储能系统、调节方法，调节系统包括第一功率变换器以及控制单元，电池系统的多个电池簇共用该第一功率变换器，控制单元分别与第一功率变换器以及每一电池簇通信连接；控制单元断开目标电池簇与其他电池簇之间的并联连接，控制目标电池簇与第一功率变换器之间的连接导通，向第一功率变换器发送目标电流指令，以对目标电池簇进行调节，从而消除目标电池簇与其他电池簇之间的荷电状态差异，从而提高电池系统的恒功率运行能力；并且本方案的多个电池簇共用一个第一功率变换器，器件成本低、散热所需成本低以及无需对现有电池系统进行改动，改装成本低。
Description
相关申请的交叉引用
本申请要求享有于2022年06月10日提交的名称为“调节系统及其储能系统、调节方法”的中国专利申请202210654627.3的优先权，该申请的全部内容通过引用并入本文中。
本申请涉及新能源汽车技术领域，具体涉及一种调节系统及其储能系统、调节方法。
传统储能系统方案架构中，多个电池簇直接并联接入功率变换器的直流侧，由于电芯个体容量、电池簇内阻等因素的差异，不同电池簇之间的SOC存在差异，从而导致整个储能系统无法满功率放电以及满功率充电，大大降低了储能系统的储能效果能力。
发明内容
鉴于上述问题，本申请提供一种调节系统及其储能系统、调节方法，解决目前储能系统因电池簇之间的SOC差异导致无法满功率放电以及满功率充电的问题。
第一方面，本申请提供了一种调节系统，该调节系统用于对电池系统进行调节，电池系统包括多个电池簇；调节系统包括第一功率变换器以及控制单元，第一功率变换器的第一端用于与每一电池簇串联，第一功率变换器的第二端用于与功率源连接，控制单元分别与第一功率变换器以及每一电池簇通信连接；控制单元，用于断开目标电池簇与其他电池簇之间的并联连接，并控制目标电池簇与第一功率变换器之间的连接导通。
本申请实施例的技术方案中，本方案设计第一功率变换器与电池系统中的每一电池簇串联，设计控制单元与第一功率变换器和每一电池簇通信，然后断开目标电池簇与其他电池簇之间的并联连接，并控制目标电池簇与第一功率变换器之间的连接导通，从而通过第一功率变换器根据目标电流指令对目标电池簇进行调节，使得目标电池簇的荷电状态接近目标荷电状态即接近其他电池簇的荷电状态，进而消除目标电池簇与其他电池簇之间的荷电状态差异，从而提高电池系统的恒功率运行能力；并且本方案的多个电池簇共用一个第一功率变换器，器件成本低、散热所需成本低以及无需对现有电池系统进行改动，改装成本低。
在第一些实施例中，调节系统还包括多个第一可控开关和多个第二可控开关；其中，第一可控开关和第二可控开关的数量与电池簇的数量相同；每一电池簇串联一第一可控开关后与其他电池簇进行并联，每一电池簇通过第二可控开关与第一功率变换器串联；控制单元，用于控制目标电池簇连接的第一可控开关断开，以断开目标电池簇与其他电池簇之间的并联连接；并控制目标电池簇与第一功率变换器之间的第二可控开关，以控制目标电池簇与第一功率变换器之间的连接导通。本实施例通过简单的可控开关设计，使得目标电池簇可与其他电池簇并联以及与第一功率变换器串联之间切换，使得在对目标电池簇进行调节时，可通过简单的开关控制实现调节切换控制，在实现功能的基础上，简化电路设计，节约设计和器件成本。
在一些实施例中，第一功率变换器的第二端与多个电池簇中的任意一条电池簇并联，以将与第一功率变换器的第二端并联的电池簇作为功率源。本申请实施例将并联的电池簇作为功率源，从而节约功率源的器件成本。
在一些实施例中，电池系统还包括功率源；第一功率变换器的第二端与功率源连接。
第二方面，本申请提供了一种储能系统，该储能系统包括电池系统和第一方面中任一可选实施方式的调节系统，电池系统包括多个电池簇和第二功率变换器，多个电池簇并联后与第二功率变换器连接，第一功率变换器的第一端与每一电池簇串联，第一功率变换器的第二端用于与功率源连接，控制单元分别与第一功率变换器以及每一电池簇通信连接。
本申请实施例的技术方案中，本方案设计第一功率变换器与电池系统中的每一电池簇串联，设计控制单元与第一功率变换器和每一电池簇通信，然后断开目标电池簇与其他电池簇之间的并联连接，并控制目标电池簇与第一功率变换器之间的连接导通，从而通过第一功率变换器根据目标电流指令对目标电池簇进行调节，使得目标电池簇的荷电状态接近目标荷电状态即接近其他电池簇的荷电状态，进而消除目标电池簇与其他电池簇之间的荷电状态差异，从而提高储能系统的恒功率运行能力；并且本方案的多个电池簇共用一个第一功率变换器，器件成本低、散热所需成本低以及无需对现有电池系统进行改动，改装成本低。
第三方面，本申请提供一种调节方法，调节方法包括：断开目标电池簇与其他电池簇之间的并联，并控制目标电池簇与第一功率变换器之间的连接导通；向第一功率变换器发送目标电流指令，以通过第一功率变换器根据目标电流指令对目标电池簇进行调节。
本申请实施例的技术方案中，本方案断开目标电池簇与其他电池簇之间的并联连接，并控制目标电池簇与第一功率变换器之间的连接导通，以及向第一功率变换器发送目标电流指令，从而通过第一功率变换器根据目标电流指令对目标电池簇进行调节，使得目标电池簇的荷电状态接近目标荷电状态即接近其他电池簇的荷电状态，进而消除目标电池簇与其他电池簇之间的荷电状态差异，从而提高储能系统的恒功率运行能力。
在一些实施例中，在断开目标电池簇与其他电池簇之间的并联之前，该方法还包括：采集每个电池簇的荷电状态；将每条电池簇的荷电状态与目标荷电状态进行比较，确定荷电状态与目标荷电状态的关系满足预设关系的电池簇为目标电池簇。
在一些实施例中，确定荷电状态与目标荷电状态的关系满足预设关系的电池簇为目标电池簇，包括：确定荷电状态与目标荷电状态差值最大的电池簇为目标电池簇。本实施例将荷电状态与目标荷电状态差值的绝对值最大的电池簇为目标电池簇，从而对多个电池簇中SOC差异最大的电池簇进行调节，可以有效消除电池系统中的SOC差异，有效提高电池系统的输出功率。
在一些实施例中，在向第一功率变换器发送目标电流指令之前，该方法还包括：计算目标电池簇的荷电状态与目标荷电状态的差值，获得荷电状态差值；计算目标电池簇的当前电流值；根据荷电状态差值和当前电流值计算目标调节电流值；根据目标调节电流值生成目标电流指令。本实施方式通过荷电状态差值和目标电池簇的当前电流值准确计算出目标调节电流值，进而基于目标调节电流值生成目标电流指令，从而可准确控制第一功率变换器对于目标电池簇的调节，使得目标电池簇的SOC调节更加精准。
在一些实施例中，计算目标电池簇的当前电流值，包括：获取母线电压、第一功率变换器的电压、目标电池簇的电池电压以及目标电池簇的阻抗；计算母线电压与第一功率变换器的电压以及目标电池簇的电池电压的差值，获得当前电压差；计算当前电压差与目标电池簇的阻抗的商，获得目标电池簇的当前电流值。
在一些实施例中，在向第一功率变换器发送目标电流指令之前，该方法还包括：计算目标电池簇的荷电状态与目标荷电状态的差值，获得荷电状态差值；计算目标电池簇的当前电流值；获取电池系统的当前工作状态；根据当前工作状态、荷电状态差值以及目标电池簇的当前电流值确定目标调节电流值；根据目标调节电流值生成目标电流指令。
在一些实施例中，根据当前工作状态、荷电状态差值以及目标电池簇的当前电流值确定目标调节电流值，包括：根据当前工作状态和荷电状态差值确定目标调节系数；计算目标调节系数与目标电池簇的当前电流值的乘积，获得目标调节电流值。
在一些实施例中，根据当前工作状态和荷电状态差值确定目标调节系数，包括：当电池系统的当前工作状态为充电，且荷电状态差值大于0时，确定目标调节系数为第一预设系数；当电池系统的当前工作状态为充电，且荷电状态差值小于0时，确定目标调节系数为第二预设系数；当电池系统的当前工作状态为放电，且荷电状态差值大于0时，确定目标调节系数为第三预设系数；当电池系统的当前工作状态为放电，且荷电状态差值小于0时，确定目标调节系数为第四预设系数；其中，第一预设系数和第四预设系数小于1，第二预设系数和第三预设系数大于1。本实施方式在电池系统是放电状态时，若目标电池簇的SOC相对其他电池簇较高，则让目标电池簇放电变快；
若目标电池簇的SOC相对其他电池簇较低，则让目标电池簇充电变慢，从而使得多个电池簇的SOC区域均衡，使得电池系统尽可能放出所有电量或充满电，从而提高储能系统的恒功率运行能力。
在一些实施例中，在断开目标电池簇与其他电池簇之间的并联之前，该方法还包括：在多个电池簇并联之前，获取每个电池簇的电池电压；将电池电压满足预设并联条件的电池簇确定为可并联电池簇；控制多个可并联电池簇进行并联。本实施方式在电池系统上电前，基于每个电池簇的电池电压，将电池电压满足预设并联条件的电池簇确定为并联电池簇，从而将所有的可并联电池簇进行并联，从而避免SOC差异过大的电池簇在上电时并联带来的环流，从而提高电池系统的可靠性。
在一些实施例中，将每一电池电压与目标电池电压的关系满足预设关系的电池簇确定为可并联电池簇，包括：将电池电压与目标电池电压的差值小于第一预设电压阈值的所有电池簇确定为可并联电池簇；在电池电压与目标电池电压的差值大于第一预设电压阈值，并且小于第二预设电压阈值的电池簇中确定备选可并联电池簇；控制第一功率变换器对备选可并联电池簇进行电压补偿，使得备选可并联电池簇成为可并联电池簇。
在一些实施例中，在电池电压与目标电池电压的差值大于第一预设电压阈值，并且小于第二预设电压阈值的电池簇中确定备选可并联电池簇，包括：若电池电压与目标电池电压的差值大于第一预设电压阈值并且小于第二预设电压阈值的电池簇数量为1个，则将电池电压与目标电池电压的差值大于第一预设电压阈值，并且小于第二预设电压阈值的电池簇确定为备选可并联电池簇；若电池电压与目标电池电压的差值大于第一预设电压阈值并且小于第二预设电压阈值的电池簇数量为多个，则将电池电压与目标电池电压的差值大于第一预设电压阈值并且小于第二预设电压阈值的多个电池簇中，电池电压与目标电池电压的差值最小的电池簇确定为备选可并联电池簇。
第四方面，本申请提供一种调节装置，调节装置应用于与电池系统连接的调节系统，电池系统包括多个电池簇包括：控制模块，用于断开目标电池簇与其他电池簇之间的并联，并控制目标电池簇与第一功率变换器之间的连接导通；发送模块，用于向第一功率变换器发送目标电流指令，以通过第一功率变换器根据目标电流指令对目标电池簇进行调节。
上述设计的调节装置，本方案通过控制模块断开目标电池簇与其他电池簇之间的并联连接，并控制目标电池簇与第一功率变换器之间的连接导通，以及通过发送模块向第一功率变换器发送目标电流指令，从而通过第一功率变换器根据目标电流指令对目标电池簇进行调节，使得目标电池簇的荷电状态接近目标荷电状态即接近其他电池簇的荷电状态，进而消除目标电池簇与其他电池簇之间的荷电状态差异，从而提高储能系统的恒功率运行能力。
第五方面，本申请提供一种电子设备，包括存储器和处理器，所述存储器存储有计算机程序，所述处理器执行所述计算机程序时执行第三方面、第三方面中任一可选的实现方式中的所述方法。
第六方面，本申请提供一种计算机可读存储介质，该计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时执行第三方面、第三方面中任一可选的实现方式中的所述方法。
第七方面，本申请提供了一种计算机程序产品，所述计算机程序产品在计算机上运行时，使得计算机执行第三方面、第三方面中任一可选的实现方式中的所述方法。
上述说明仅是本实用新型实施例技术方案的概述，为了能够更清楚了解本实用新型实施例的技术手段，而可依照说明书的内容予以实施，并且为了让本实用新型实施例的上述和其它目的、特征和优点能够更明显易懂，以下特举本实用新型的具体实施方式。
通过阅读对下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在全部附图中，用相同的附图标号表示相同的部件。在附图中：
图1为本申请提供的调节系统的第一结构示意图；
图2为本申请提供的调节系统的第二结构示意图；
图3为本申请提供的调节系统的第三结构示意图；
图4为本申请提供的调节系统的第四结构示意图；
图5为本申请提供的储能系统结构示意图；
图6为本申请提供的调节方法的第一流程图；
图7为本申请提供的调节方法的第二流程图；
图8为本申请提供的调节方法的第三流程图；
图9为本申请提供的调节方法的第四流程图；
图10为本申请提供的调节方法的第五流程图；
图11为本申请提供的调节方法的第六流程图；
图12为本申请提供的调节装置结构示意图；
图13为本申请提供的电子设备的结构示意图。
具体实施方式中的附图标号如下：
1-调节系统；10-第一功率变换器；20-控制单元；2-电池系统；21-电池簇；22-第二功率变换器；K-第一可控开关；B-第二可控开关；C-功率源；3-储能系统；1200-控制模块；1210-发送模块；1220-采集模块；1230-确定模块；1240-计算模块；1250-生成模块；1260-获取模块；13-电子设备；1301-处理器；1302-存储器；1303-通信总线。
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：存在A，同时存在A和B，存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简
化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
目前，从市场形势的发展来看，电池的应用越加广泛。电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
传统储能系统方案架构中，多个电池簇直接并联接入第二功率变换器的直流侧，由于电芯个体容量、电池簇内阻等因素的差异，加上各电池簇实际工作环境温度无法保证完全一致，导致不同电池簇之间出现不可避免的荷电状态(State of Charge，SOC)差异。例如，某一电池簇的SOC为n个电池簇中SOC值的最小值，在放电过程中，由于该SOC最小值的电池簇电量最少，导致其将最先放空，提前达到放电截止电压，进而退出运行，第二功率变换器无法按设计时间持续满功率放电，从而大大降低了储能系统的恒功率运行能力，充电过程同样如此。
本发明人注意到，目前的方案是在每个电池簇支路中设置一个第一功率变换器，通过第一功率变换器来均衡不同电池簇之间的SOC，使得各个电池簇的SOC均相等，即不同电池簇的可用电量始终保持一致，解决从而不同电池簇之间并联失配的问题。但该方案中由于采用在每个支路中串联一个第一功率变换器，这样对于储能系统的设计带来器件成本的增加，并且由于增加了很多个第一功率变换器，原本储能系统的散热不能满足需求，因此，可能也会带来散热设计的改进以及散热成本的增加。
对于上述问题，发明人经过深入研究，设计了一种调节系统及其储能系统、调节方法，该调节系统通过多个电池簇共用一个第一功率变换器在调节方法的控制下可依次对不同电池簇进行调节，从而在节约成本的同时，解决不同电池簇SOC差异性的问题。
本申请提供一种调节系统，如图1所示，该调节系统1可对电池系统2进行调节，请参照图1，该电池系统2包括多个电池簇21，多个电池簇21具体可如图1所示的包含电池簇A1到电池簇An，多个电池簇21并联后可用于与第二功率变换器22连接，从而实现功率输出。其中，每个电池簇21可包括多个依次串联的电池211，该第二功率变换器21可为DC/AC变换器或逆变器等，作用是将并联的多个电池簇21的直流电源转换成输出电压和频率稳定的交流电源。
该调节系统1包括第一功率变换器10和控制单元20，该控制单元20可与第一功率变换器10通信连接。
调节系统1在对电池系统2进行调节时，调节系统1与电池系统2的连接方式可图1所示，第一功率变换器10的第一端与每一电池簇21串联，第一功率变换器10的第二端用于与功率源C连接，控制单元20可与每一电池簇21通信。其中，第一功率变换器10可为DC/DC变换器，也可称为开关电源或开关调整器，其作用是转变输入电压并有效输出固定电压；控制单元20可为具有处理能力的计算设备，包括但不限于芯片、计算机、服务器等，也可以为电池管理系统BMS或储能系统管理服务器等。
常规情况下，电池系统2中的所有电池簇21并联并导通从而向第二功率变换器传输电能实现电能输出，在常规工作过程中，控制单元20可检测每个电池簇21的荷电状态，在荷电状态差异较大时，调节系统1则进行调节，具体调节过程为：控制单元20首先在多个电池簇21中确定需要调节的目标电池簇，然后断开目标电池簇与其他电池簇之间的并联连接，并控制目标电池簇与第一功率变换器10之间的连接导通，从而使得第一功率变换器10根据目标电流指令对目标电池簇进行调节，从而消除目标电池簇与其他电池簇之间的SOC差异，提高电池系统的功率输出。例如，电池簇A1到电池簇An均并联与第二功率变换器22连接，控制单元20确定出电池簇A1为目标电
池簇，那么控制单元则断开电池簇A1与其他电池簇的并联连接，然后将电池簇A1与第一功率变换器10连接导通，进而通过第一功率变换器10根据目标电流指令对目标电池簇进行调节，使得电池簇A1的荷电状态接近目标荷电状态即接近其他电池簇的荷电状态。
其中，目标电池簇可为荷电状态与目标荷电状态的关系满足预设关系的电池簇，具体可为荷电状态与目标荷电状态的差值绝对值最大的电池簇，也可以是荷电状态与目标荷电状态的差值大于预设值的多个电池簇中的任意一个电池簇。该目标荷电状态可为多个电池簇的荷电状态平均值，也可以为多个电池簇中的荷电状态最大值或最小值。
这里需要说明的是，在目标电池簇的荷电状态与目标荷电状态的关系满足预设关系后，控制单元20可将目标电池簇与第一功率变换器10的连接断开，然后将目标电池簇与其他并联的电池簇并联，从而接入电池系统。
上述设计的调节系统，本方案设计第一功率变换器与电池系统中的每一电池簇串联，设计控制单元与第一功率变换器和每一电池簇通信，然后断开目标电池簇与其他电池簇之间的并联连接，并控制目标电池簇与第一功率变换器之间的连接导通，从而通过第一功率变换器根据目标电流指令对目标电池簇进行调节，使得目标电池簇的荷电状态接近目标荷电状态即接近其他电池簇的荷电状态，进而消除目标电池簇与其他电池簇之间的荷电状态差异，从而提高储能系统的恒功率运行能力；并且本方案的多个电池簇共用一个第一功率变换器，器件成本低、散热所需成本低以及无需对现有电池系统进行改动，改装成本低。
在本实施例的一些实施例中，如图2所示，该调节系统还包括多个第一可控开关K和多个第二可控开关B，其中，多个第一可控开关K和第二可控开关B的数量与多个电池簇21的数量相等，每个电池簇21通过一个第一可控开关K连接后与其他电池簇并联，每个电池簇21与一个第二可控开关B连接后与第一功率变换器10连接。
请参照图2，例如，电池簇A1通过第一可控开关K连接后与其他电池簇并联，电池簇A1与第二可控开关B连接后与第一功率变换器10连接。
在图2所示的电路结构基础上，控制单元20可控制与目标电池簇连接的第一可控开关K断开，使得目标电池簇与其他电池簇的并联连接断开，然后控制与目标电池簇连接的第二可控开关B闭合，使得目标电池簇与第一功率变换器10的连接导通，从而通过第一功率变换器10对目标电池簇进行调节。在调节完毕后，控制单元20可控制与目标电池簇连接的第二可控开关B闭合，从而断开目标电池簇与第一功率变换器10的连接，然后控制与目标电池簇连接的第一可控开关K闭合，使得目标电池簇与其他电池簇并联。
其中，第一可控开关K和第二可控开关B可采用相同的可控开关，也可采用不同的可控开关。作为一种具体的示例，若采用相同的可控开关，第一可控开关K和第二可控开关B均可采用晶闸管或可控硅等可控开关实现控制。
上述实施方式，本方案通过简单的可控开关设计，使得目标电池簇可在与其他电池簇并联以及与第一功率变换器串联之间进行切换，使得在对目标电池簇进行调节时，可通过简单的开关控制实现调节切换控制，在实现功能的基础上，简化电路设计，节约设计和器件成本。
在本实施例的一些实施例中，第一功率变换器10的第二端可与多个电池簇中的任意一个电池簇并联，从而将与第一功率变换器10的第二端并联的电池簇作为功率源C。例如，请参照图3所示，第一功率变换器10的第二端与电池簇A1并联，那么电池簇A1则作为功率源C。
在本实施例的一些实施例中，如图4所示，该调节系统1还可包括功率源C，第一功率变换器10的第二端与功率源C连接，其中，该功率源C包括但不限于独立电池、超级电容、直流母线等。
在本实施例的一些实施例中，该第一功率变换器10可以是非隔离型DC/DC变换器，也可以是隔离型DC/DC变换器；第一功率变换器10在与电池簇进行串联时，可以与电池簇两端(正极或负极)中的任意一端串联，也可以与电池簇中的某一位置串联。
本申请提供一种储能系统，如图5所示，该储能系统3包括前述的任一实施方式描述的调
节系统1以及前述的电池系统2，调节系统1与电池系统2的连接方式前文已进行了描述，在这里不再赘述。
本申请提供一种调节方法，该调节方法可应用于前述的调节系统中，该调节方法可由前述调节系统中的控制单元执行，如图6所示，该调节方法可通过如下方式实现：
步骤S600：断开目标电池簇与其他电池簇之间的并联，并控制目标电池簇与第一功率变换器之间的连接导通。
步骤S610：向第一功率变换器发送目标电流指令，以通过第一功率变换器根据目标电流指令对目标电池簇进行调节。
上述实施方式，前面描述到电池系统2在常规情况下多个电池簇并联与第二功率变换器传输电能实现电能输出，在此基础上，控制单元可与每一电池簇通信，获得每一电池簇在当前状态下的荷电状态即SOC，然后将每一电池簇的SOC与目标荷电状态(目标SOC)进行比较，从而将SOC与目标SOC的关系满足预设关系的电池簇确定为目标电池簇。其中，这里需要说明的是，本方案在执行一次调节过程中仅可确定一个电池簇为目标电池簇进行调节。
在确定出目标电池簇后，本方案断开目标电池簇与其他电池簇之间的并联连接，并控制目标电池簇与第一功率变换器之间的连接导通，以及向第一功率变换器发送目标电流指令，使得第一功率变换器根据目标电流指令对目标电池簇进行调节，从而使得目标电池簇的SOC与目标SOC接近，从而基本消除目标电池簇与其他电池簇之间的SOC差异，从而提高储能系统的恒功率运行能力。
这里需要说明的是，目标电池指令可通过目标调节电流生成，该目标调节电流可对目标电池簇的SOC进行调节，具体的，第一功率变换器可根据目标电流指令调节自身输出的电压从而将第一功率变换器与目标电池簇连接的线路电流进行调节，从而对目标电池簇的SOC进行调节。
上述设计的调节方法，本方案断开目标电池簇与其他电池簇之间的并联连接，并控制目标电池簇与第一功率变换器之间的连接导通，以及向第一功率变换器发送目标电流指令，从而通过第一功率变换器根据目标电流指令对目标电池簇进行调节，使得目标电池簇的荷电状态接近目标荷电状态即接近其他电池簇的荷电状态，进而消除目标电池簇与其他电池簇之间的荷电状态差异，从而提高储能系统的恒功率运行能力。
在本实施例的一些实施方式中，本方案可通过如下方式在多个电池簇中确定目标电池簇：
作为一种可能的实施方式，本方案可采集每个电池簇的荷电状态，将每个电池簇的荷电状态与目标荷电状态进行比较，最终确定荷电状态与目标荷电状态差值的绝对值最大的电池簇为目标电池簇。
上述设计的实施方式，本方案将荷电状态与目标荷电状态差值的绝对值最大的电池簇为目标电池簇，从而对多个电池簇中SOC差异最大的电池簇进行调节，可以有效消除电池系统中的SOC差异，有效提高电池系统的输出功率。
作为另一种可能的实施方式，本方案可采集每个电池簇的荷电状态，将每个电池簇的荷电状态与目标荷电状态进行比较，将荷电状态与目标荷电状态差值大于预设值的电池簇集合在一起，然后在集合中随机抽选一个电池簇作为目标电池簇。其中，前述的目标荷电状态可为所有电池簇的荷电状态的平均值，也可以为所有电池簇中SOC最小或SOC最大的电池簇的SOC值。
在本实施例的一些实施方式中，前面描述到控制单元可向第一功率变换器发送目标电流指令，对此，作为一种可能的实施方式，如图7所示，本方案可通过如下方式确定并生成该目标电流指令，包括：
步骤S700：计算目标电池簇的荷电状态与目标荷电状态的差值，获得荷电状态差值。
步骤S710：计算目标电池簇的当前电流值。
步骤S720：根据荷电状态差值和当前电流值计算目标调节电流值。
步骤S730：根据目标调节电流值生成目标电流指令。
在上述实施方式中，控制单元可计算目标电池簇的SOC与目标SOC的差值，获得ΔSOC。其中，该目标SOC前面描述到可为所有电池簇的SOC平均值，也可以为所有电池簇中的SOC最大值或最小值。
并且，控制单元可计算目标电池簇的当前电流值，其中，该当前电流值表示目标电池簇与第一功率变换器串联之后的线路电流值。其中，本方案的控制单元可同时执行步骤S700以及步骤S710的计算操作，也可以分先后执行，本方案对此不做限定。
作为一种可能的实施方式，目标电池簇的当前电流值可通过如下方式计算，如图8所示，包括：
步骤S800：获取母线电压、第一功率变换器的电压、目标电池簇的电池电压以及目标电池簇的阻抗。
步骤S810：计算母线电压与第一功率变换器的电压以及目标电池簇的电池电压的差值，获得当前电压差。
步骤S820：计算当前电压差与目标电池簇的阻抗的商，获得目标电池簇的当前电流值。
在上述实施方式中，第一功率变换器的电压为第一功率变换器与目标电池簇串联后的电压，目标电池簇的电池电压为目标电池簇与第一功率变换器串联后的电压，目标电池簇的阻抗为目标电池簇与第一功率变换器串联后线路的总阻抗。其中，母线电压、第一功率变换器的电压、目标电池簇的电池电压可通过控制单元实时采集获得，目标电池簇的阻抗可通过查询获得，具体的，本方案可提前计算每一电池簇与第一功率变换器串联后的总阻抗，然后将每一电池簇的总阻抗与对应电池簇标识存储在控制单元中，进而通过目标电池簇标识即可查询获得目标电池簇对应的总阻抗。
对于上述实施方式，本方案可通过如下公式对上述计算过程进行表示：
I目＝(U母-UDC-Ubat)/R总；
I目＝(U母-UDC-Ubat)/R总；
其中，U母表示母线电压；UDC为第一功率变换器的电压；Ubat为目标电池簇的电池电压；R总为目标电池簇的阻抗。
通过上述方式计算出目标电池簇的当前电流值后，本方案可根据荷电状态差值和当前电流值计算目标调节电流值。作为一种具体的实施方式，本方案可依据第一功率变换器的输出功率和调节能力结合荷电状态差值计算出第一功率变换器的可调节电流值f(ΔSOC)，具体的，可调节电流值f(ΔSOC)可通过如下方式计算获得：
f(ΔSOC)＝K*[(1+ΔSOC)n-1]，ΔSOC>0；
f(ΔSOC)＝-K*[(1+ΔSOC)n-1]，ΔSOC<0；
f(ΔSOC)＝K*[(1+ΔSOC)n-1]，ΔSOC>0；
f(ΔSOC)＝-K*[(1+ΔSOC)n-1]，ΔSOC<0；
其中，K为线性系数，n为幂指数，K和n的取值可根据第一功率变换器的具体参数进行适应性变化，例如，第一功率变换器的输出功率和调节能力越强，那么K和n则随之增大。
通过上述方式计算出可调节电流值f(ΔSOC)后，本方案可根据当前电流值和可调节电流值计算出目标调节电流值，具体的，目标调节电流值I2可通过如下方式计算获得：
I2＝I目+f(ΔSOC)；
I2＝I目+f(ΔSOC)；
在计算出目标调节电流值I2后，可根据目标调节电流值I2生成对应的目标电流指令发送给第一功率变换器，使得第一功率变换器根据该目标调节电流值I2调节自身电压，从而达到调节目标电池簇所在线路的电流的效果。
作为另一种可能的实施方式，除了前述计算目标调节电流值的方式以外，本方案还提供另一种计算目标调节电流值的方式，如图9所示，包括：
步骤S900：计算目标电池簇的荷电状态与目标荷电状态的差值，获得荷电状态差值。
步骤S910：计算目标电池簇的当前电流值。
步骤S920：获取电池系统的当前工作状态。
步骤S930：根据当前工作状态、荷电状态差值以及目标电池簇的当前电流值确定目标调节电流值。
步骤S940：根据目标调节电流值生成目标电流指令。
在上述实施方式中，步骤S900和步骤S910与前述的步骤S800和步骤S810实现方式一致，在这里不再赘述，本实施方式在计算出荷电状态差值ΔSOC以及目标电池簇的当前电流值I目后，本方案可获取电池系统的当前工作状态。其中，电池系统的当前工作状态可包含充电或放电，充电表示电池系统中的电池簇均处于充电状态，放电表示电池系统中的电池簇均处于放电状态。
在上述基础上，本方案可根据当前工作状态和荷电状态差值首先确定目标调节系数x，然后将确定的目标调节系数x与当前电流值I目相乘，从而获得目标调节电流值I2。即，I2＝xI目。
具体的，本方案可通过如下方式确定目标调节系数x：
当电池系统的当前工作状态为充电，且荷电状态差值大于0时，确定目标调节系数x为第一预设系数x1。
当电池系统的当前工作状态为充电，且荷电状态差值小于0时，确定目标调节系数x为第二预设系数x2。
当电池系统的当前工作状态为放电，且所述荷电状态差值大于0时，确定目标调节系数x为第三预设系数x3。
当电池系统的当前工作状态为放电，且荷电状态差值小于0时，确定目标调节系数x为第四预设系数x4。
其中，第一预设系数x1和第四预设系数x4小于1，第二预设系数x2和第三预设系数x3大于1；第一预设系数x1和第四预设系数x4可相同例如均为0.95，也可以不相同例如x1为0.95，x4为0.9，；第二预设系数x2和第三预设系数x3可相同，例如均为1.05；也可以不相同，例如x2为1.05，x4为1.1。这里需要说明的是，目标调节系数的数值只是为了便于理解进行的举例说明，本方案设计的目标调节系数的数值可根据实际场景进行适应性增大或减小调整。
上述实施方式原理是，在电池系统是充电状态时，若目标电池簇的SOC相对其他电池簇较高，则让目标电池簇充电变慢；若目标电池簇的SOC相对其他电池簇较低，则让目标电池簇充电变快。
在电池系统是放电状态时，若目标电池簇的SOC相对其他电池簇较高，则让目标电池簇放电变快；若目标电池簇的SOC相对其他电池簇较低，则让目标电池簇充电变慢，从而使得多个电池簇的SOC区域均衡，使得电池系统尽可能放出所有电量或充满电，从而提高储能系统的恒功率运行能力。
在本实施例的一些实施例中，前面描述的场景均是电池系统中的电池簇已经并联运行状态下的场景，本方案还在电池系统的电池簇上电前对电池簇进行检测并补偿，从而避免电池系统出现环流，如图10所示，包括：
步骤S1000：在多个电池簇并联之前，获取每个电池簇的电池电压。
步骤S1010：将电池电压满足预设并联条件的电池簇确定为可并联电池簇。
步骤S1020：控制多个可并联电池簇进行并联。
在上述实施方式中，在电池系统上电前，每个电池簇可能具有一定的电池电压，例如，在
上次断电时，电池簇内的电池存储有一定的电能但未消耗完，在此基础上，控制单元可获取每个电池簇的电池电压，然后基于每个电池簇的电池电压，将电池电压满足预设并联条件的电池簇确定为可并联电池簇，然后控制多个可并联电池簇进行并联。
上述实施方式，本方案在电池系统上电前，基于每个电池簇的电池电压，将电池电压满足预设并联条件的电池簇确定为并联电池簇，从而将所有的可并联电池簇进行并联，从而避免SOC差异过大的电池簇在上电时并联带来的环流，从而提高电池系统的可靠性。
在本实施例的一些实施方式中，如图11所示，本方案可通过如下方式确定可并联电池簇，包括：
步骤S1100：将电池电压与目标电池电压的差值小于第一预设电压阈值的所有电池簇确定为可并联电池簇。
步骤S1110：在电池电压与目标电池电压的差值大于第一预设电压阈值，并且小于第二预设电压阈值的电池簇中确定备选可并联电池簇。
步骤S1120：控制第一功率变换器对备选可并联电池簇进行电压补偿，使得备选可并联电池簇成为可并联电池簇。
在上述实施方式中，本方案可提前配置第一预设电压阈值UA和第二预设电压阈值UB，其中，第二电压阈值UB大于第一电压阈值UA，第二电压阈值UB可根据第一功率变换器的调压能力确定。
本方案可在获取每一电池簇的电池电压后，计算出每一电池电压与目标电池电压的电压差值，然后将电压差值与第一预设电压阈值UA和第二预设电压阈值UB进行比较。
若电池簇的电池电压与目标电池电压的电压差值小于第一预设电压阈值UA，则将该电池簇确定为可并联电池簇；
若电池簇的电池电压与目标电池电压的电压差值大于第一预设电压阈值UA，则判断该电池簇的电池电压与目标电池电压的电压差值是否小于第二预设电压阈值UB，若小于第二预设电压阈值UB，由于第一功率变换器只能对一个电池簇进行补偿，使该电池簇的电池电压能够逼近目标电池电压，从而参与并联。在此基础上，本方案若是只存在一个电池电压与目标电池电压的电压差值大于第一预设电压阈值UA并小于第二预设电压阈值UB的电池簇，那么则将该电池簇确定为备选可并联电池簇，进而控制第一功率变换器对该备选可并联电池簇进行电压补偿，使得备选可并联电池簇成为可并联电池簇。
若是存在多个电池电压与目标电池电压的电压差值大于第一预设电压阈值UA并小于第二预设电压阈值UB的电池簇，那么则将电池电压与目标电池电压的电压差值最大的电池簇确定为备选可并联电池簇。当然，除了将电池电压与目标电池电压的电压差值最大的电池簇作为备选电池簇以外，本方案还可在多个电池电压与目标电池电压的电压差值大于第一预设电压阈值UA并小于第二预设电压阈值UB的电池簇中随机选择一个电池簇作为备选可并联电池簇。
若该电池簇的电池电压与目标电池电压的电压差值大于第二预设电压阈值UB，则说明该电池簇的电池电压与目标电池电压的差距过大，第一功率变换器无法进行调节，则将该电池簇列入不并联行列。
图12出示了本申请提供一种调节装置的示意性结构框图，应理解，该装置与图6至图11中执行的方法实施例对应，能够执行前述的方法涉及的步骤，该装置具体的功能可以参见上文中的描述，为避免重复，此处适当省略详细描述。该装置包括至少一个能以软件或固件(firmware)的形式存储于存储器中或固化在装置的操作系统(operating system，OS)中的软件功能模块。具体地，该装置包括：控制模块1200，用于断开目标电池簇与其他电池簇之间的并联，并控制目标电池簇与第一功率变换器之间的连接导通；发送模块1210，用于向第一功率变换器发送目标电流指令，以通过第一功率变换器根据目标电流指令对目标电池簇进行调节。
上述设计的调节装置，本方案通过控制模块断开目标电池簇与其他电池簇之间的并联连接，
并控制目标电池簇与第一功率变换器之间的连接导通，以及通过发送模块向第一功率变换器发送目标电流指令，从而通过第一功率变换器根据目标电流指令对目标电池簇进行调节，使得目标电池簇的荷电状态接近目标荷电状态即接近其他电池簇的荷电状态，进而消除目标电池簇与其他电池簇之间的荷电状态差异，从而提高储能系统的恒功率运行能力。
在本实施例的一些实施方式中，该装置还包括采集模块1220，用于采集每个电池簇的荷电状态；确定模块1230，用于将每个电池簇的荷电状态与目标荷电状态进行比较，确定荷电状态与目标荷电状态的关系满足预设关系的电池簇为目标电池簇。
在本实施例的一些实施方式中，该确定模块1230，具体用于确定荷电状态与目标荷电状态差值的绝对值最大的电池簇为目标电池簇。
在本实施例的一些实施方式中，该装置还包括计算模块1240，用于计算目标电池簇的荷电状态与目标荷电状态的差值，获得荷电状态差值；计算目标电池簇的当前电流值；以及，根据荷电状态差值和当前电流值计算目标调节电流值；生成模块1250，用于根据目标调节电流值生成目标电流指令。
在本实施例的一些实施方式中，该计算模块1240，具体用于获取母线电压、第一功率变换器的电压、目标电池簇的电池电压以及目标电池簇的阻抗；计算母线电压与第一功率变换器的电压以及目标电池簇的电池电压的差值，获得当前电压差；计算当前电压差与目标电池簇的阻抗的商，获得目标电池簇的当前电流值。
在本实施例的一些实施方式中，该计算模块1240，还用于计算目标电池簇的荷电状态与目标荷电状态的差值，获得荷电状态差值；计算目标电池簇的当前电流值；该装置还包括获取模块1260，用于获取电池系统的当前工作状态；该确定模块1230，还用于根据当前工作状态、荷电状态差值以及目标电池簇的当前电流值确定目标调节电流值；该生成模块1240，还用于根据目标调节电流值生成目标电流指令。
在本实施例的一些实施方式中，该确定模块1230具体用于根据当前工作状态和荷电状态差值确定目标调节系数；计算目标调节系数与目标电池簇的当前电流值的乘积，获得目标调节电流值。
在本实施例的一些实施方式中，该确定模块1230，还具体用于当电池系统的当前工作状态为充电，且荷电状态差值大于0时，确定目标调节系数为第一预设系数；当电池系统的当前工作状态为充电，且荷电状态差值小于0时，确定目标调节系数为第二预设系数；当电池系统的当前工作状态为放电，且荷电状态差值大于0时，确定目标调节系数为第三预设系数；当电池系统的当前工作状态为放电，且荷电状态差值小于0时，确定目标调节系数为第四预设系数；其中，第一预设系数和第四预设系数小于1，第二预设系数和第三预设系数大于1。
在本实施例的一些实施方式中，该获取模块1260，还用于在多个电池簇并联之前，获取每个电池簇的电池电压；该确定模块1230，还用于将每一电池电压与目标电池电压的关系满足预设关系的电池簇确定为可并联电池簇；该控制模块1200，还用于控制多个可并联电池簇进行并联。
在本实施例的一些实施方式中，该确定模块1230，还具体用于将电池电压与目标电池电压的差值小于第一预设电压阈值的所有电池簇确定为可并联电池簇；在电池电压与目标电池电压的差值大于第一预设电压阈值，并且小于第二预设电压阈值的电池簇中确定备选可并联电池簇；控制第一功率变换器对备选可并联电池簇进行电压补偿，使得备选可并联电池簇成为可并联电池簇。
在本实施例的一些实施方式中，该确定模块1230，还具体用于若电池电压与目标电池电压的差值大于第一预设电压阈值并且小于第二预设电压阈值的电池簇数量为1个，则将电池电压与目标电池电压的差值大于第一预设电压阈值，并且小于第二预设电压阈值的电池簇确定为备选可并联电池簇；若电池电压与目标电池电压的差值大于第一预设电压阈值并且小于第二预设电压阈值的电池簇数量为多个，则将电池电压与目标电池电压的差值大于第一预设电压阈值并且小于第二预设电压阈值的多个电池簇中，电池电压与目标电池电压的差值最小的电池簇确定为备选可并联电池簇。
根据本申请的一些实施例，如图13所示，本申请提供一种电子设备13，包括：处理器
1301和存储器1302，处理器1301和存储器1302通过通信总线1303和/或其他形式的连接机构(未标出)互连并相互通讯，存储器1302存储有处理器1301可执行的计算机程序，当计算设备运行时，处理器1301执行该计算机程序，以执行时执行任一可选的实现方式中外端机执行的方法，例如步骤S600至步骤S610：断开目标电池簇与其他电池簇之间的并联，并控制目标电池簇与第一功率变换器之间的连接导通；向第一功率变换器发送目标电流指令，以通过第一功率变换器根据目标电流指令对目标电池簇进行调节。
本申请提供一种计算机可读存储介质，该计算机可读存储介质上存储有计算机程序，该计算机程序被处理器运行时执行前述任一可选的实现方式中的方法。
其中，存储介质可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，如静态随机存取存储器(Static Random Access Memory,简称SRAM)，电可擦除可编程只读存储器(Electrically Erasable Programmable Read-Only Memory,简称EEPROM)，可擦除可编程只读存储器(Erasable Programmable Read Only Memory,简称EPROM)，可编程只读存储器(Programmable Red-Only Memory,简称PROM)，只读存储器(Read-Only Memory,简称ROM)，磁存储器，快闪存储器，磁盘或光盘。
本申请提供一种计算机程序产品，该计算机程序产品在计算机上运行时，使得计算机执行任一可选的实现方式中的方法。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。
Claims (19)
- 一种调节系统，其特征在于，所述调节系统用于对电池系统进行调节，所述电池系统包括多个电池簇；所述调节系统包括第一功率变换器以及控制单元，所述第一功率变换器的第一端用于与每一所述电池簇串联，所述第一功率变换器的第二端用于与功率源连接，所述控制单元分别与所述第一功率变换器以及每一电池簇通信连接；所述控制单元，用于断开目标电池簇与其他电池簇之间的并联连接，并控制所述目标电池簇与所述第一功率变换器之间的连接导通。
- 根据权利要求1所述的调节系统，其特征在于，所述调节系统还包括多个第一可控开关和多个第二可控开关；其中，所述第一可控开关和第二可控开关的数量与所述电池簇的数量相同；每一所述电池簇串联一第一可控开关后与其他电池簇进行并联，每一电池簇通过第二可控开关与所述第一功率变换器串联；所述控制单元，用于控制所述目标电池簇连接的第一可控开关断开，以断开所述目标电池簇与其他电池簇之间的并联连接；并控制所述目标电池簇与所述第一功率变换器之间的第二可控开关，以控制所述目标电池簇与所述第一功率变换器之间的连接导通。
- 根据权利要求1或2所述的调节系统，其特征在于，所述第一功率变换器的第二端与所述多个电池簇中的任意一条电池簇并联，以将与所述第一功率变换器的第二端并联的电池簇作为所述功率源。
- 根据权利要求1或2中任一项所述的调节系统，其特征在于，所述调节系统还包括功率源；所述第一功率变换器的第二端与所述功率源连接。
- 一种储能系统，其特征在于，所述储能系统包括电池系统和权利要求1-4中任一项所述的调节系统，所述电池系统包括多个电池簇和第二功率变换器，所述多个电池簇并联后与所述第二功率变换器连接，所述第一功率变换器的第一端与每一所述电池簇串联，所述第一功率变换器的第二端用于与功率源连接，所述控制单元分别与所述第一功率变换器以及每一电池簇通信连接。
- 一种调节方法，其特征在于，所述调节方法包括：断开目标电池簇与其他电池簇之间的并联，并控制所述目标电池簇与第一功率变换器之间的连接导通；向所述第一功率变换器发送目标电流指令，以通过所述第一功率变换器根据所述目标电流指令对所述目标电池簇进行调节。
- 根据权利要求6所述的方法，其特征在于，在所述断开所述目标电池簇与其他电池簇之间的并联之前，所述方法还包括：采集每个电池簇的荷电状态；将每个电池簇的荷电状态与目标荷电状态进行比较，确定荷电状态与目标荷电状态的关系满足预设关系的电池簇为所述目标电池簇。
- 根据权利要求6或7所述的方法，其特征在于，所述方法还包括：确定荷电状态与目标荷电状态差值的绝对值最大的电池簇为所述目标电池簇。
- 根据权利要求6-8中任一项所述的方法，其特征在于，在所述向所述第一功率变换器发送目标电流指令之前，所述方法还包括：计算所述目标电池簇的荷电状态与所述目标荷电状态的差值，获得荷电状态差值；获取所述目标电池簇的当前电流值；根据所述荷电状态差值和当前电流值计算目标调节电流值；根据所述目标调节电流值生成所述目标电流指令。
- 根据权利要求9所述的方法，其特征在于，所述计算所述目标电池簇的当前电流值，包括：获取母线电压、第一功率变换器的电压、目标电池簇的电池电压以及目标电池簇的阻抗；计算所述母线电压与第一功率变换器的电压以及目标电池簇的电池电压的差值，获得当前电压差；计算所述当前电压差与所述目标电池簇的阻抗的商，获得所述目标电池簇的当前电流值。
- 根据权利要求6-8中任一项所述的方法，其特征在于，在所述向所述第一功率变换器发送目标电流指令之前，所述方法还包括：计算所述目标电池簇的荷电状态与所述目标荷电状态的差值，获得荷电状态差值；获取所述目标电池簇的当前电流值；获取所述电池系统的当前工作状态；根据所述当前工作状态、所述荷电状态差值以及所述目标电池簇的当前电流值确定目标调节电流值；根据所述目标调节电流值生成所述目标电流指令。
- 根据权利要求11所述的方法，其特征在于，所述根据所述当前工作状态、所述荷电状态差值以及所述目标电池簇的当前电流值确定目标调节电流值，包括：根据所述当前工作状态和所述荷电状态差值确定目标调节系数；计算所述目标调节系数与所述目标电池簇的当前电流值的乘积，获得所述目标调节电流值。
- 根据权利要求12所述的方法，其特征在于，所述根据所述当前工作状态和所述荷电状态差值确定目标调节系数，包括：当所述电池系统的当前工作状态为充电，且所述荷电状态差值大于0时，确定所述目标调节系数为第一预设系数；当所述电池系统的当前工作状态为充电，且所述荷电状态差值小于0时，确定所述目标调节系数为第二预设系数；当所述电池系统的当前工作状态为放电，且所述荷电状态差值大于0时，确定所述目标调节系数为第三预设系数；当所述电池系统的当前工作状态为放电，且所述荷电状态差值小于0时，确定所述目标调节系数为第四预设系数；其中，所述第一预设系数和第四预设系数小于1，所述第二预设系数和第三预设系数大于1。
- 根据权利要求6-8中任一项所述的方法，其特征在于，在所述断开所述目标电池簇与其他电池簇之间的并联之前，所述方法还包括：在所述多个电池簇并联之前，获取每个电池簇的电池电压；将电池电压满足预设并联条件的电池簇确定为可并联电池簇；控制多个可并联电池簇进行并联。
- 根据权利要求14所述的方法，其特征在于，所述将电池电压满足预设并联条件的电池簇确定为可并联电池簇，包括：将电池电压与目标电池电压的差值小于第一预设电压阈值的所有电池簇确定为可并联电池簇；在电池电压与目标电池电压的差值大于第一预设电压阈值，并且小于第二预设电压阈值的电池簇中确定备选可并联电池簇；控制所述第一功率变换器对所述备选可并联电池簇进行电压补偿，使得所述备选可并联电池簇成为可并联电池簇。
- 根据权利要求15所述的方法，其特征在于，所述在电池电压与目标电池电压的差值大于第一预设电压阈值，并且小于第二预设电压阈值的电池簇中确定备选可并联电池簇，包括：若所述电池电压与目标电池电压的差值大于第一预设电压阈值并且小于第二预设电压阈值的电池簇数量为1个，则将所述电池电压与目标电池电压的差值大于第一预设电压阈值，并且小于第二预设电压阈值的电池簇确定为备选可并联电池簇；若电池电压与目标电池电压的差值大于第一预设电压阈值并且小于第二预设电压阈值的电池簇数量为多个，则将电池电压与目标电池电压的差值大于第一预设电压阈值并且小于第二预设电压阈值的多个电池簇中，电池电压与目标电池电压的差值最小的电池簇确定为备选可并联电池簇。
- 一种调节装置，其特征在于，所述调节装置应用于与电池系统连接的调节系统，所述电池系统包括多个电池簇，包括：控制模块，用于断开所述目标电池簇与其他电池簇之间的并联，并控制所述目标电池簇与第一功率变换器之间的连接导通；发送模块，用于向所述第一功率变换器发送目标电流指令，以通过所述第一功率变换器根据所述目标电流指令对所述目标电池簇进行调节。
- 一种电子设备，包括存储器和处理器，所述存储器存储有计算机程序，其特征在于，所述处理器执行所述计算机程序时实现权利要求6至16中任一项所述的方法。
- 一种计算机可读存储介质，其上存储有计算机程序，其特征在于，所述计算机程序被处理器执行时实现权利要求6至16中任一项所述的方法。
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| CN113949111B (zh) * | 2020-07-15 | 2024-01-30 | 华为数字能源技术有限公司 | 储能系统 |
| CN112467839B (zh) * | 2020-11-23 | 2023-09-29 | 阳光电源股份有限公司 | 一种电池簇管理装置及电池储能系统 |
| CN113517747B (zh) * | 2021-08-30 | 2024-02-23 | 阳光储能技术有限公司 | 一种电池簇均衡储能系统及其控制方法 |
| CN114583807B (zh) * | 2022-05-09 | 2022-10-14 | 宁德时代新能源科技股份有限公司 | 储能系统的控制方法、装置、设备、存储介质和程序产品 |
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| CN113437780A (zh) * | 2021-07-30 | 2021-09-24 | 阳光电源股份有限公司 | 一种电池簇均衡储能系统及其控制方法 |
| CN215870854U (zh) * | 2021-08-30 | 2022-02-18 | 阳光储能技术有限公司 | 一种电池簇均衡储能系统 |
| CN114362288A (zh) * | 2021-12-08 | 2022-04-15 | 深圳市科陆电子科技股份有限公司 | 电池簇间均衡调节方法、系统及存储介质 |
| CN115800414A (zh) * | 2022-06-10 | 2023-03-14 | 宁德时代新能源科技股份有限公司 | 调节系统及其储能系统、调节方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117411152A (zh) * | 2023-12-15 | 2024-01-16 | 宁德时代新能源科技股份有限公司 | 储能系统的控制方法、控制装置和计算机可读存储介质 |
| CN117411152B (zh) * | 2023-12-15 | 2024-04-12 | 宁德时代新能源科技股份有限公司 | 储能系统的控制方法、控制装置和计算机可读存储介质 |
| CN117698508A (zh) * | 2024-01-23 | 2024-03-15 | 吉林大学 | 可变压的电动汽车电池包、电池控制系统及其反向供电方法 |
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