WO2021190196A1 - 并联电池组充放电管理方法、电子装置及电气系统 - Google Patents
并联电池组充放电管理方法、电子装置及电气系统 Download PDFInfo
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- WO2021190196A1 WO2021190196A1 PCT/CN2021/076382 CN2021076382W WO2021190196A1 WO 2021190196 A1 WO2021190196 A1 WO 2021190196A1 CN 2021076382 W CN2021076382 W CN 2021076382W WO 2021190196 A1 WO2021190196 A1 WO 2021190196A1
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- 238000007726 management method Methods 0.000 title claims abstract description 99
- 238000007599 discharging Methods 0.000 title claims abstract description 60
- 238000004146 energy storage Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 34
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000012827 research and development Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 1
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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
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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
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0025—Sequential battery discharge in systems with a plurality of batteries
-
- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- 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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/005—Detection of state of health [SOH]
-
- 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
- the solutions in the prior art have the following shortcomings: 1.
- the battery pack voltage needs to be adjusted manually, and the parallel connection of the battery packs is not smart enough, which increases the complexity and cost of installation and debugging; 2.
- the battery pack The parameter in parallel connection is single, and the charging and discharging current is not limited, resulting in the same voltage between the battery packs in parallel but the actual capacity difference is large. Circulating high current causes damage and damage.
- the reference voltage value may be obtained by the following method: when none of the multiple battery packs is connected to the power bus, the minimum value of the voltage values of the multiple battery packs is used as the reference value.
- the reference voltage value when none of the multiple battery packs is connected to the power bus, the minimum value of the voltage values of the multiple battery packs is used as the reference value. The reference voltage value.
- I discharge a ⁇ k 2 ⁇ P m ;
- the step of performing charge and discharge management on the plurality of battery packs according to the comparison result further includes: when at least one battery pack is connected to the power bus and the battery packs not connected to the power bus are in discharging In the state, it is determined whether the difference between the reference voltage value and the voltage value of the battery pack not connected to the power bus is within the third interval and the reference state of charge is compared with the charge of the battery pack not connected to the power bus.
- the difference between the electrical states is within the fourth interval; if the difference between the reference voltage value and the voltage value of the battery pack that is not connected to the power bus is within the third interval and the reference state of charge The difference between the state of charge and the state of charge of the battery pack not connected to the power bus is in the fourth interval, and the battery pack is controlled to be connected to the power bus in sequence.
- the parallel battery pack charging and discharging management method further includes: when the battery pack has a fault alarm, receiving the fault alarm information; Cut out the power bus separately.
- the electronic device further includes a plurality of switches corresponding to the plurality of battery packs one-to-one, and each of the switches is connected between the battery pack and the energy storage inverter.
- the parallel battery pack charging and discharging management method, electronic device, and electrical system obtained the voltage values and state of charge of multiple battery packs, and compare the voltage values and state of charge of the battery packs with reference The voltage value is compared with the reference state of charge, and then the charge and discharge management of the plurality of battery packs is performed according to the comparison result.
- the technical solution provided by the present application can improve the degree of automation of parallel battery packs, enhance the adaptability of the parallel system, improve the execution efficiency of the parallel, further reduce operation and maintenance costs, and improve user experience.
- FIG. 1 is a schematic diagram of a parallel system architecture of parallel battery packs according to an embodiment of the present application.
- FIG. 3 is a flowchart of a charging and discharging management method for parallel battery packs according to another embodiment of the present application.
- FIG. 4 is a flowchart of a method for charging and discharging parallel battery packs according to another embodiment of the present application.
- Fig. 6 is a flowchart of a charging and discharging management method for parallel battery packs according to another embodiment of the present application.
- Fig. 7 is a block diagram of a charging and discharging management system for parallel battery packs according to an embodiment of the present application.
- FIG. 1 is a schematic diagram of a system architecture for paralleling battery packs 10 in parallel according to an embodiment of the present application.
- the embodiment of the present application provides an electrical system, and the electrical system includes an electronic device 100 and an energy storage inverter 20.
- the electronic device 100 in the embodiment of the present application is electrically connected to the energy storage inverter 20, and the electronic device 100 may include a battery pack 10 in parallel.
- the parallel battery pack 10 may include a plurality of battery packs connected in parallel (FIG. 1 only uses three battery packs 10a, 10b, and 10c as an example for illustration, and there may be more than three or less than three).
- Each battery pack 10a, 10b, 10c includes a positive electrode B+ and a negative electrode B-.
- the positive electrode B+ of each battery pack 10a-10c is connected together to form the positive electrode of the parallel battery pack 10, and the negative electrode B- of each battery pack 10a-10c Connected together to form the negative electrode of the parallel battery pack 10.
- the output of the parallel battery pack 10 is converged to the DC input side of the energy storage inverter 20.
- the negative pole B- of each battery pack 10a, 10b, 10c is electrically connected to the power bus P- of the energy storage inverter 20, and the positive pole B+ of each battery pack 10a, 10b, 10c is electrically connected through the switch K. Connected to the power bus P+ of the energy storage inverter 20.
- the number of the switches is the same as the number of the battery packs and corresponds to one-to-one. That is, the power lines of each battery pack can be connected in parallel to the power buses P+ and P- through the corresponding switch K.
- each battery pack 10a, 10b, 10c further includes an internal bus interface and an external bus interface.
- the internal bus interface can realize the internal bus communication function
- the external bus interface can realize the external bus communication function. It is understandable that the internal bus communication function can be used to realize the internal communication between each battery pack 10a-10c, and the external bus communication function can be used to realize the communication between the host and the energy storage inverter 20.
- the internal bus and the external bus may be a CAN communication bus or an RS485 communication bus.
- one of the battery packs in the parallel battery pack 10 may be a master, and the remaining battery packs may be slaves.
- each battery pack may be provided with a battery management unit, and each battery pack is managed by a corresponding battery management unit. That is, in the embodiment of the present application, the switch states of the plurality of switches K can be controlled by the corresponding battery management unit, respectively.
- the battery pack 10a is a master, and the battery packs 10b and 10c are slaves.
- the battery pack 10a is provided with a battery management unit BMU1, and the battery packs 10b and 10c are respectively provided with battery management units BMU2 and BMU3.
- the battery management unit in the slave machine sends the data information and status of the corresponding battery pack to the battery management unit in the master through the internal bus. Therefore, the battery management unit in the host can summarize and analyze the data information and status of each battery management unit (including the battery management unit of the host), and calculate the corresponding control parameters, and then manage each battery separately through the internal bus The unit is controlled, and at the same time, data interaction and operation scheduling can be performed with the energy storage inverter 20 through an external bus.
- FIG. 2 is a flow chart of the steps of a charging and discharging management method for parallel battery packs according to an embodiment of the present application.
- the charging and discharging management method of parallel battery packs may include the following steps.
- Step S21 Obtain the voltage values and state of charge of multiple battery packs.
- the battery management unit of each slave sends the data information and status of the corresponding battery pack to the battery management unit of the master via the internal bus.
- the battery management unit BMU1 in the battery pack 10a may obtain the voltage values and the state of charge of the battery packs 10b and 10c through the battery management units BMU2 and BMU3.
- SOC State of Charge
- Step S22 Compare the voltage value and the state of charge of the battery pack with the reference voltage value and the reference state of charge, respectively.
- the total voltage value of each battery pack needs to be compared with the reference voltage value, and the state of charge of each battery pack needs to be compared with the reference state of charge.
- the reference voltage value and the reference state of charge of the power dynamic parallel machine are both calculated by the battery management unit of the host.
- the reference voltage value can be obtained by the following method: if none of the plurality of battery packs 10a-10c is connected to the power bus, the voltage values of the plurality of battery packs 10a-10c The minimum value in can be used as the reference voltage value.
- the reference voltage value can also be obtained by the following method: if there is already power cut into the power bus in the plurality of battery packs 10a-10c, that is, all the power buses that have been connected to the power bus are used. The minimum value among the voltage values of the battery pack is used as the reference voltage value.
- the reference state of charge can also be obtained by the following method: if there is already power cut into the power bus in the multiple battery packs 10a-10c, that is, the power bus is connected to the power bus. The minimum value of the state of charge of the battery pack is used as the reference state of charge.
- Step S23 Perform charge and discharge management on the multiple battery packs according to the comparison result.
- the battery management unit of the host compares the voltage value and the state of charge of the battery pack with the reference voltage value and the reference state, respectively.
- the electrical status is compared, and the charge and discharge management of the plurality of battery packs can be performed according to the comparison result.
- Power dynamic paralleling requires the cooperation of the energy storage inverter, that is, during the dynamic paralleling of the battery pack, the energy storage inverter needs to be charged or discharged according to the current limit value calculated by the battery management unit of the host.
- the battery management unit of the host computer calculates the charging current limit value and the discharge current limit value, which can be specifically carried out through the following steps:
- Step S31 Obtain the number of the battery packs connected to the power bus.
- the battery management unit of the host obtains the number of the battery packs that have been cut into the power bus.
- Step S32 Determine the charging current limit value and the discharging current limit value of the energy storage inverter.
- the charging current limit value of the energy storage inverter is denoted as I charge
- the discharge current limit value is denoted as I discharge .
- the charging current limit value I charge satisfies the following formula:
- I charge a ⁇ k 1 ⁇ P m (1)
- a is the 1C current of the battery pack
- k 1 is the charging current limit coefficient
- P m is the number of the battery packs that have been cut into the power bus.
- discharge current limit value I discharge satisfies the following formula:
- I discharge a ⁇ k 2 ⁇ P m (2)
- a is the 1C current of the battery pack
- k 2 is the discharge current limiting coefficient
- P m is the number of the battery packs connected to the power bus.
- the battery management unit determines the plurality of battery packs according to the comparison result of the voltage value and the state of charge of the battery pack with the reference voltage value and the reference state of charge
- the charging and discharging management method can specifically adopt the following method steps:
- Step S41 It is determined that none of the multiple battery packs is connected to the power bus.
- the battery management unit of the master can determine whether the multiple battery packs are not connected to the power bus according to the data information and status of the battery pack fed back by the battery management unit of each slave machine.
- the battery management unit BMU 1 of the battery pack 10a will The charge current limit value I charge and the discharge current limit value I discharge are both 0 sent to the energy storage inverter through the external bus.
- the reference voltage value of the power dynamic parallel operation will be determined as the minimum value among the voltage values of the multiple battery packs, and the reference state of charge of the power dynamic parallel operation will be determined as the voltage value of the multiple battery packs. The minimum value in the state of charge.
- Step S42 Determine whether the difference between the voltage values of the plurality of battery packs 10a-10c and the reference voltage value is less than a first threshold and the state of charge of the plurality of battery packs 10a-10c and the reference state of charge Whether the difference between is less than the second threshold. If yes, go to step S43.
- the battery management unit BMU1 of the battery pack 10a compares the collected total voltage of each battery pack with a reference voltage value, and also collects the state of charge of each battery pack with the reference state of charge compared to.
- the battery management unit BMU1 of the battery pack 10a will determine whether the difference between the voltage values of the plurality of battery packs and the reference voltage value is less than a first threshold, and the state of charge of the plurality of battery packs Whether the difference from the reference state of charge is smaller than the second threshold.
- Step S43 Control the battery pack to sequentially connect to the power bus.
- the battery management unit BMU1 of the battery pack 10a will set the power of each battery pack and cut into the command, and then the battery management units BMU1, BMU2, and BMU3 will also Close the switch K, the multiple battery packs 10a-10c will be connected to the power bus in sequence, and the power of each battery pack will be switched into the power bus in parallel, and the power parallel completion flag will be set.
- the battery management unit determines the plurality of batteries according to the comparison result of the voltage value and the state of charge of the battery pack with the reference voltage value and the reference state of charge
- the charging and discharging management method of the group can also adopt the following method steps:
- Step S51 It is determined that at least one battery pack has been connected to the power bus and the battery pack is in a charging state.
- the battery management unit of the host will send the charge current limit value I charge and discharge to the energy storage inverter 20 through the external bus.
- the current limit value I discharge Therefore, the energy storage inverter 20 will output the charge and discharge current according to the corresponding charge current limit value and discharge current limit value.
- Step S52 Determine whether the difference between the voltage value of the battery pack that is not connected to the power bus and the reference voltage value is within the first interval, and whether the difference between the state of charge and the reference state of charge is within the second interval. If yes, go to step S53.
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Abstract
Description
Claims (14)
- 一种并联电池组充放电管理方法,其特征在于,所述并联电池组充放电管理方法包括:获取多个电池组的电压值及荷电状态;将所述电池组的电压值及荷电状态分别与参考电压值及参考荷电状态进行比较;及根据比较结果对所述多个电池组进行充放电管理。
- 根据权利要求1所述的并联电池组充放电管理方法,其特征在于,所述参考电压值可通过以下方法获取:当所述多个电池组均未接入功率总线时,以所述多个电池组的电压值中的最小值为所述参考电压值。
- 根据权利要求1所述的并联电池组充放电管理方法,其特征在于,所述参考荷电状态可通过以下方法获取:当所述多个电池组均未接入功率总线时,以所述多个电池组的荷电状态中的最小值为所述参考荷电状态。
- 根据权利要求1所述的并联电池组充放电管理方法,其特征在于,所述参考电压值还可通过以下方法获取:当所述电池组已接入功率总线时,以已接入功率总线的所述电池组的电压值中的最小值为所述参考电压值。
- 根据权利要求1所述的并联电池组充放电管理方法,其特征在于,所述参考荷电状态还可通过以下方法获取:当所述电池组已接入功率总线时,以已接入功率总线的所述电池组的荷电状态中的最小值为所述参考荷电状态。
- 根据权利要求1所述的并联电池组充放电管理方法,其特征在于,所述并联电池组充放电管理方法还包括:获取已接入功率总线的所述电池组的数量;及确定储能逆变器的充电限流值I charge及放电限流值I discharge。
- 根据权利要求6所述的并联电池组充放电管理方法,其特征在于,所述充电限流值I charge满足以下公式:I charge=a×k 1×P m;其中,a为电池组的1C电流,k 1为充电限流系数,P m为已接入功率总线的所述电池组的数量。
- 根据权利要求6所述的并联电池组充放电管理方法,其特征在于,所述放电限流值I discharge满足以下公式:I discharge=a×k 2×P m;其中,a为电池组的1C电流,k 2为放电限流系数,P m为已接入功率总线的所述电池组的数量。
- 根据权利要求1所述的并联电池组充放电管理方法,其特征在于,所述根据比较结果对所述多个电池组进行充放电管理的步骤还包括:当所述多个电池组均未接入功率总线时,判断所述多个电池组的电压值与参考电压值的差值是否均小于第一阈值且所述多个电池组的荷电状态与所述参考荷电状态的差值是否均小于第二阈值;及若所述多个电池组的电压值与参考电压值的差值均小于第一阈值且所述多个电池组的荷电状态与所述参考荷电状态的差值均小于第二阈值,控制电池组依次接入功率总线。
- 根据权利要求9所述的并联电池组充放电管理方法,其特征在于,所述根据比较结果对所述多个电池组进行充放电管理的步骤还包括:当至少一个电池组已接入功率总线且电池组处于充电状态时,判断未接入功率总线的电池组的电压值与参考电压值之间的差值是否在第一区间内且未接入功率总线的电池组的荷电状态与所述参考荷电状态之间的差值是否在第二区间内;若未接入功率总线的电池组的电压值与参考电压值之间的差值均在第一区间内且未接入功率总线的电池组的荷电状态与所述参考荷电状态之间的差值均在第二区间内,控制电池组依次接入功率总线。
- 根据权利要求10所述的并联电池组充放电管理方法,其特征在于,所述根据比较结果对所述多个电池组进行充放电管理的步骤还包括:当至少一个电池组均接入功率总线且未接入功率总线的电池组处于放电状态时,判断所述参考电压值与未接入功率总线的电池组的电压值之间的差值是否在第三区间内且所述参考荷电状态与未接入功率总线的电池组的荷电状态之间的差值是否在第四区间内;若所述参考电压值与未接入功率总线的电池组的电压值之间的差值均在第三区间内且所述参考荷电状态与未接入功率总线的电池组的荷电状态之间的差值均在第四区间内,控制电池组依次接入功率总线。
- 根据权利要求11所述的并联电池组充放电管理方法,其特征在于,所述并联电池组充放电管理方法还包括:当电池组出现故障告警时,接收到所述故障告警信息;及控制所有电池组切出功率总线或将故障的电池组单独切出功率总线。
- 一种电子装置,其特征在于,所述电子装置包括:多个电池组;电池管理单元,用于执行如权利要求1-12中任意一项所述的充放电管理方法。
- 一种电气系统,其特征在于,所述电气系统包括储能逆变器及如权利要求13所述的电子装置,所述电子装置还包括与所述多个电池组一一对应的多个开关,每一所述开关连接于电池组与所述储能逆变器之间。
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