WO2020233693A1 - 不间断电源ups、电源系统和电池容量测试的方法 - Google Patents

不间断电源ups、电源系统和电池容量测试的方法 Download PDF

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Publication number
WO2020233693A1
WO2020233693A1 PCT/CN2020/091688 CN2020091688W WO2020233693A1 WO 2020233693 A1 WO2020233693 A1 WO 2020233693A1 CN 2020091688 W CN2020091688 W CN 2020091688W WO 2020233693 A1 WO2020233693 A1 WO 2020233693A1
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Prior art keywords
battery pack
battery
capacity
ups
discharge
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PCT/CN2020/091688
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English (en)
French (fr)
Inventor
舒州
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to EP20808885.6A priority Critical patent/EP3955413B1/en
Publication of WO2020233693A1 publication Critical patent/WO2020233693A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G01R31/387—Determining ampere-hour charge capacity or SoC
    • G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements
    • 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
    • G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
    • 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]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/50—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • 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]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Definitions

  • This application relates to the field of electric power, and more specifically, to uninterruptible power supply UPS, power system and battery capacity testing methods.
  • UPS uninterruptible power supply
  • UPS is a system device that connects the battery to the host and converts DC power into AC power through a module circuit such as the host inverter.
  • UPS is mainly used to provide a stable and uninterrupted power supply to a single computer, computer network system or other power electronic equipment such as solenoid valves and pressure transmitters.
  • the UPS When the mains input is normal, the UPS will stabilize the mains and supply it to the load.
  • the UPS is an AC-type voltage stabilizer, and it can also charge the internal battery.
  • the UPS immediately uses the DC power of the battery to continue to supply AC power to the load through the inverter, so that the load can maintain normal operation and protect the load software and hardware from damage.
  • the system needs to measure the real-time capacity of the battery online.
  • a solution is that all battery packs are discharged at the same time, and the discharge depth is generally 100%. At this time, the implementation capacity of the battery in the system can be accurately detected.
  • the battery backup time of the UPS power supply system is basically zero, which brings potential power supply safety hazards to the system.
  • This application provides an uninterruptible power supply UPS, a power supply system composed of the UPS and battery packs, and a battery capacity test method, which can accurately detect the total battery capacity of the power system, and when the capacity test and the mains are abnormal, the power supply The system has sufficient backup time.
  • an uninterruptible power supply UPS is provided, where the UPS is connected to a load and at least two battery packs, and the UPS includes a test unit and a determination unit,
  • the test unit is configured to perform an individual capacity test on each battery pack in the at least two battery packs, to obtain the battery capacity of each battery pack, wherein the individual capacity test includes each battery pack In the case that the battery pack and the mains supply power to the load jointly, the battery capacity of each battery pack is measured, and the other battery packs except for each battery pack are not discharged and have backup power; the determination The unit is used to determine the total battery capacity of the at least two batteries according to the battery capacity of each battery pack.
  • the embodiment of the present application detects the battery capacity of each battery pack in the system when each battery pack is combined with the mains to supply power to the load, and then determines the total battery capacity of the system according to the battery capacity of each battery pack.
  • the battery packs other than the detected battery pack are not discharged and have backup power. Based on this, the embodiments of the present application can not only accurately detect the total battery capacity of the system, but also ensure that the power supply system has sufficient backup time when the capacity test and the mains are abnormal, thereby reducing the power supply risk of the system.
  • the battery capacity of the battery pack refers to the real-time capacity of the battery pack, that is, the amount of electricity actually discharged after the battery pack is fully charged in actual use.
  • the maintenance personnel grasp the real-time capacity of each battery pack, the maintenance personnel can determine whether the system backup time is sufficient, and can decide whether the battery needs to be replaced based on the calculated system backup time, so as to eliminate the lack of system backup time. risk.
  • the UPS is also connected to at least two control circuits connected in a one-to-one correspondence with each battery pack, wherein each of the at least two control circuits is connected to the UPS and the Between the battery packs corresponding to each control circuit, wherein the UPS is specifically configured to control the battery packs connected to each control circuit to charge or discharge through each control circuit.
  • the embodiment of the present application can realize independent control of charging or discharging of each battery through the control of the at least two control circuits, which provides conditions for independent capacity testing.
  • control circuit includes a DC/DC circuit.
  • the test unit is further configured to control the discharge voltage of the DC/DC circuit corresponding to each battery pack to be higher than that of the other battery packs when the individual capacity test is performed on each battery pack.
  • the discharge voltage of the DC/DC circuit is further configured to control the discharge voltage of the DC/DC circuit corresponding to each battery pack to be higher than that of the other battery packs when the individual capacity test is performed on each battery pack.
  • the discharge current of other battery packs can be made zero, which means that other battery packs do not perform Discharge.
  • the test unit is specifically configured to obtain the battery capacity of each battery pack from a DC/DC circuit corresponding to each battery pack when performing a separate capacity test on each battery pack.
  • the DC/DC circuit corresponding to each battery pack detects the voltage and discharge current of the corresponding battery pack, and calculates the battery capacity of the battery pack based on the monitored voltage and discharge current of the battery pack and sends it to UPS.
  • the test unit when the test unit performs a separate capacity test on each battery pack, it obtains the voltage and discharge current of each battery pack, and then determines according to the voltage and discharge current of each battery pack The battery capacity of each battery pack.
  • the UPS is used to detect the voltage and discharge current of each battery pack at this time, and calculate the battery capacity of each battery pack.
  • the test unit is specifically configured to: in the process of performing an individual capacity test on each battery pack, control each battery pack to discharge from a fully charged state to a battery voltage as a discharge cut-off voltage. In this way, the accurate battery capacity of each battery pack can be obtained, and then the accurate total battery capacity can be determined.
  • control unit configured to control the charging of each battery pack after obtaining the battery capacity of each battery pack.
  • a power supply system including the UPS described in the first aspect and any possible implementation manner of the first aspect and at least two battery packs connected to the UPS.
  • the power supply system further includes at least two control circuits connected in a one-to-one correspondence with each of the battery packs, wherein each of the at least two control circuits is connected to the UPS and the Between the battery packs corresponding to each control circuit, wherein the UPS is specifically configured to control the battery packs connected to each control circuit to charge or discharge through each control circuit.
  • control circuit includes a DC/DC circuit.
  • a method for battery capacity testing is also provided, the method is executed by an uninterruptible power supply UPS, the UPS is connected to a load, and at least two battery packs, and the method includes:
  • the total battery capacity of the at least two battery packs is determined.
  • the UPS is also connected to at least two control circuits connected in a one-to-one correspondence with each battery pack, wherein each of the at least two control circuits is connected to the UPS and the Between the battery packs corresponding to each control circuit, wherein the UPS is specifically configured to control the battery packs connected to each control circuit to charge or discharge through each control circuit.
  • control circuit includes a DC/DC circuit.
  • control the discharge voltage of the DC/DC circuit corresponding to each battery pack to be higher than the discharge voltage of the DC/DC circuit corresponding to the other battery packs .
  • obtaining the battery capacity of each battery pack includes:
  • obtaining the battery capacity of each battery pack includes:
  • the battery capacity of each battery pack is determined.
  • control each battery pack in the process of performing an individual capacity test on each battery pack, control each battery pack to discharge from a fully charged state until the battery voltage is the discharge cut-off voltage.
  • the method further includes: after obtaining the battery capacity of each battery pack, controlling to charge each battery pack.
  • the embodiment of the present application detects the battery capacity of each battery pack in the system when each battery pack is combined with the mains to supply power to the load, and then determines the total battery capacity of the system according to the battery capacity of each battery pack.
  • the battery packs other than the detected battery pack are not discharged and have backup power. Based on this, the embodiments of the present application can not only accurately detect the total battery capacity of the system, but also ensure that the power supply system has sufficient backup time when the capacity test and the mains are abnormal, thereby reducing the power supply risk of the system.
  • Fig. 1 shows a schematic diagram of a power supply system provided by an embodiment of the present application.
  • Fig. 2 shows a schematic diagram of a UPS provided by an embodiment of the present application.
  • Fig. 3 shows a schematic diagram of a power supply system to which an embodiment of the present application is applied.
  • FIG. 4 shows a schematic diagram of a sequence of battery capacity detection provided by an embodiment of the present application.
  • Figure 5 shows an example of a different DC/DC cell discharge characteristic curve.
  • Fig. 6 shows another example of the discharge characteristic curve of a different DC/DC cell.
  • FIG. 7 shows a schematic flowchart of a method for battery capacity testing provided by an embodiment of the present application.
  • FIG. 1 shows a schematic diagram of a power supply system 100 provided by an embodiment of the present application.
  • the power supply system 100 can be applied to communication stations in the communication field, or applied to the field of civil equipment such as street lamp systems, property buildings, and car charging stations. , Used to provide a stable and uninterrupted power supply.
  • the power supply system 100 may include a UPS 110, a load 120, and at least two battery packs (for example, the battery pack 1, the battery pack 2, and the battery pack 3 shown in FIG. 1).
  • FIG. 2 shows a schematic block diagram of the UPS.
  • the UPS includes a testing unit 210 and a determining unit 220.
  • the test unit 210 is configured to perform an individual capacity test on each battery pack in the at least two battery packs to obtain the battery capacity of each battery pack, wherein the individual capacity test is included in each battery pack In the case that the battery pack and the mains supply power to the load jointly, the battery capacity of each battery pack is measured, and the other battery packs except for each battery pack are not discharged and have backup power.
  • the determining unit 220 is configured to determine the total battery capacity of the at least two batteries according to the battery capacity of each battery pack.
  • the embodiment of the present application detects the battery capacity of each battery pack in the system when each battery pack is combined with the mains to supply power to the load, and then determines the total battery capacity of the system according to the battery capacity of each battery pack.
  • the battery packs other than the detected battery pack are not discharged and have backup power. Based on this, the embodiments of the present application can not only accurately detect the total battery capacity of the system, but also ensure that the power supply system has sufficient backup time when the capacity test and the mains are abnormal, thereby reducing the power supply risk of the system.
  • the battery capacity of the battery pack refers to the real-time capacity of the battery pack, that is, the amount of electricity actually discharged after the battery pack is fully charged in actual use.
  • the maintenance personnel grasp the real-time capacity of each battery pack, the maintenance personnel can determine whether the system backup time is sufficient, and can decide whether the battery needs to be replaced based on the calculated system backup time, so as to eliminate the lack of system backup time. risk.
  • the UPS is also connected to at least two control circuits connected in a one-to-one correspondence with each battery pack, wherein each of the at least two control circuits is connected to the UPS and the Between the battery packs corresponding to each control circuit, wherein the UPS is specifically configured to control the battery packs connected to each control circuit to charge or discharge through each control circuit.
  • the embodiment of the present application can realize that the UPS controls each battery to charge or discharge independently through the control of the at least two control circuits, which provides conditions for independent capacity testing.
  • control circuit includes a DC/DC circuit.
  • test unit 210 when the test unit 210 performs a separate capacity test on each battery pack, it controls the discharge voltage of the DC/DC circuit corresponding to each battery pack to be higher than the DC/DC circuit corresponding to the other battery packs.
  • the discharge voltage of the DC circuit when the test unit 210 performs a separate capacity test on each battery pack, it controls the discharge voltage of the DC/DC circuit corresponding to each battery pack to be higher than the DC/DC circuit corresponding to the other battery packs.
  • the discharge voltage of the DC circuit when the test unit 210 performs a separate capacity test on each battery pack, it controls the discharge voltage of the DC/DC circuit corresponding to each battery pack to be higher than the DC/DC circuit corresponding to the other battery packs.
  • the discharge current of other battery packs can be made zero, which means that other battery packs do not perform Discharge.
  • the test unit 210 is specifically configured to obtain the battery capacity of each battery pack from the DC/DC circuit corresponding to each battery pack when performing a separate capacity test on each battery pack.
  • the DC/DC circuit corresponding to each battery pack detects the voltage and discharge current of the corresponding battery pack, and calculates the battery capacity of the battery pack based on the monitored voltage and discharge current of the battery pack and sends it to UPS.
  • test unit 210 when the test unit 210 performs a separate capacity test on each battery pack, obtains the voltage and discharge current of each battery pack, and then according to the voltage and discharge current of each battery pack, Determine the battery capacity of each battery pack.
  • the UPS is used to detect the voltage and discharge current of each battery pack at this time, and calculate the battery capacity of each battery pack.
  • the test unit 210 is specifically configured to control the discharge of each battery pack from a fully charged state to the battery voltage as the discharge cut-off voltage during the individual capacity test of each battery pack. In this way, the accurate battery capacity of each battery pack can be obtained, and then the accurate total battery capacity can be determined.
  • the UPS 110 further includes a control unit, configured to control the charging of each battery pack after obtaining the battery capacity of each battery pack.
  • Fig. 3 shows a schematic diagram of a power supply system to which an embodiment of the present application is applied.
  • the power supply system may include UPS, loads, and multiple battery packs.
  • the battery pack includes, for example, battery pack 1 to battery pack N, where N is an integer greater than one.
  • the mains input is normal, the mains provides energy to make the UPS output to the load, and the UPS can charge the battery pack.
  • the UPS controls the battery pack to discharge, and the battery pack provides energy to make the UPS output the load, and the battery pack is in a discharge state.
  • the UPS can also control the utility power and the battery pack to jointly supply power to the load, that is, part of the energy supply of the load comes from the utility power and part of the energy supply comes from the battery pack.
  • the system load can be borne by the mains and the battery pack at the same time, which provides a precondition for the discharge of a single battery pack (or two battery packs, multiple battery packs, etc.).
  • the power supply system may further include a direct current to direct current (DC/DC) unit, and each battery pack is respectively connected to the UPS through the DC/DC unit.
  • DC/DC direct current to direct current
  • each battery pack is respectively connected to the UPS through the DC/DC unit.
  • the battery pack 1 and UPS are connected through a DC/DC unit 1
  • the battery pack N and UPS are connected through a DC/DC unit N.
  • the DC/DC unit may be an example of the above control circuit.
  • the DC/DC unit may also be referred to as a DC/DC circuit.
  • the DC/DC unit can be connected to the UPS through a communication bus, which can transmit instructions or data.
  • the DC/DC unit serves as a control module connected to the battery pack, and can control each battery pack to charge or discharge under the control of the UPS. Therefore, in the embodiment of the present application, by providing a DC/DC unit on each battery pack, the UPS can realize independent control of each battery pack to discharge or charge through the DC/DC unit of each battery pack.
  • each battery pack is connected to the UPS through a DC/DC unit, it is possible to realize independent control of the charging or discharging state of each battery pack, which can achieve a single battery pack (or two sets of batteries). Groups, multiple battery packs, etc.) provide preconditions for discharging.
  • the discharge current and discharge voltage of each battery pack can be independently controlled.
  • the battery pack 1 can be discharged while the battery pack 2 is in a non-charged and non-discharged state.
  • the discharge current and voltage of the discharged battery pack may be determined separately when the battery pack is jointly powered by the mains. Then according to the discharge current and voltage of the discharged battery pack, the battery capacity of the discharged battery pack is determined.
  • the discharge current may be the discharge current required for battery capacity detection preset by the system.
  • the DC/DC unit can detect the voltage information and current information of the battery pack, or the UPS can detect the voltage information and current information of the battery pack, which is not limited in this application.
  • the DC/DC unit and the UPS may be taken as examples of the controller 110 in FIG. 1.
  • each battery pack may also be charged.
  • battery pack 1 under the condition of normal power supply from the mains, battery pack 1, battery pack 2,..., battery pack N performs battery discharge and capacity detection in order. After a battery pack completes battery discharge and capacity detection, the battery pack can be fully charged, and then discharge and capacity detection of the next battery pack are performed. After the entire sequence operation is completed, the real-time battery capacity of all battery packs can be calculated.
  • FIG. 4 shows a schematic diagram of a sequence of battery capacity detection provided by an embodiment of the present application.
  • all battery packs are in a charging or standing state.
  • all battery packs are in a fully charged state to ensure that the battery pack 1 is fully charged before the battery pack 1 is discharged for capacity testing during the T2 time period, and the system's backup time can be ensured to be sufficient .
  • Perform discharge and capacity detection on battery pack 1 during the T2 time period and calculate the real-time battery capacity of battery pack 1. At this time, other battery packs do not supply power to the UPS.
  • all the battery packs are in a charging or standing state.
  • all the battery packs are in a fully charged state to ensure that the battery pack 2 is discharged before the capacity test is performed during the T4 time period.
  • the full state can ensure that the backup power time of the system is sufficient.
  • discharge and capacity detection of battery pack 2 are performed, and the real-time battery capacity of battery pack 2 is calculated. At this time, other battery packs do not supply power to the UPS. And so on.
  • the battery capacity detection sequence may be stored in the UPS and/or DC/DC unit.
  • the time sequence is stored in the UPS, there may be data communication between the UPS and each DC/DC unit, which is used to coordinate the charging and discharging sequence of the system during battery capacity detection.
  • FIG. 5 shows examples of the discharge characteristic curves of different DC/DC cells when the battery pack performs discharge and capacity detection.
  • the droop algorithm is used in the control. The larger the output current, the lower the output DC/DC port voltage.
  • the output DC/DC port voltage is higher than the highest output of the discharge characteristic curve of the battery pack under non-capacity detection Voltage. That is, the dotted line representing the DC/DC port voltage does not intersect the discharge characteristic curve of the battery pack in non-capacity detection, so the discharge current of the battery pack in non-capacity detection is zero.
  • the battery pack that was in the capacity detection state returns to the normal discharge state.
  • the DC/DC discharge reference voltage corresponding to the battery pack in the capacity detection state can be adjusted, and all the batteries share the load in a balanced manner.
  • Fig. 6 shows an example of the discharge characteristic curves of different DC/DC units when the utility power is abnormal during the time period during which the battery is discharged and the capacity is detected.
  • the discharge characteristic curve of the battery pack under capacity detection coincides with the discharge characteristic curve of the battery pack under non-capacity detection.
  • the embodiment of the present application detects the battery capacity of each battery pack in the system when each battery pack is combined with the mains to supply power to the load, and then determines the total battery capacity of the system according to the battery capacity of each battery pack.
  • the battery packs other than the detected battery pack are not discharged and have backup power. Based on this, the embodiments of the present application can not only accurately detect the total battery capacity of the system, but also ensure that the power supply system has sufficient backup time when the capacity test and the mains are abnormal, thereby reducing the power supply risk of the system.
  • the embodiment of the present application also provides a power supply system, including any UPS described above and at least two battery packs connected to the UPS.
  • the UPS includes the control circuit described above.
  • FIG. 7 shows a schematic flowchart of a battery capacity test method provided by an embodiment of the present application.
  • the method should be executed by a UPS.
  • the UPS is connected to a load and at least two battery packs.
  • the method include:
  • the UPS is also connected to at least two control circuits connected in a one-to-one correspondence with each battery pack, wherein each of the at least two control circuits is connected to the UPS and the Between the battery packs corresponding to each control circuit, wherein the UPS is specifically configured to control the battery packs connected to each control circuit to charge or discharge through each control circuit.
  • control circuit includes a DC/DC circuit.
  • control the discharge voltage of the DC/DC circuit corresponding to each battery pack to be higher than the discharge voltage of the DC/DC circuit corresponding to the other battery packs .
  • obtaining the battery capacity of each battery pack includes:
  • obtaining the battery capacity of each battery pack includes:
  • the battery capacity of each battery pack is determined.
  • control each battery pack in the process of performing an individual capacity test on each battery pack, control each battery pack to discharge from a fully charged state until the battery voltage is the discharge cut-off voltage.
  • control to charge each battery pack after obtaining the battery capacity of each battery pack, control to charge each battery pack.
  • each step shown in FIG. 7 can be referred to the description of each corresponding device module above, for the sake of brevity, it will not be repeated here.
  • the embodiment of the present application detects the battery capacity of each battery pack in the system when each battery pack is combined with the mains to supply power to the load, and then determines the total battery capacity of the system according to the battery capacity of each battery pack.
  • the battery packs other than the detected battery pack are not discharged and have backup power. Based on this, the embodiments of the present application can not only accurately detect the total battery capacity of the system, but also ensure that the power supply system has sufficient backup time during capacity testing and when the mains power is abnormal, thereby reducing the power supply risk of the system.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

本申请提供了不间断电源UPS、电源系统和电池容量测试的方法，能够准确检测出系统的电池总容量，并在容量测试以及市电异常时，供电系统备电时间充足。该UPS与负载以及至少两个电池组分别连接，所述UPS包括测试单元，用于对所述至少两个电池组中的每个电池组进行单独容量测试，获取所述每个电池组的电池容量，其中，测量所述每个电池组的电池容量时，除所述每个电池组之外的其他电池组不放电且具有备电；还包括确定单元，用于根据所述每个电池组的电池容量，确定所述至少两个电池的总电池容量。

Description

不间断电源UPS、电源系统和电池容量测试的方法
本申请要求于2019年5月23日提交中国专利局、申请号为201910435165.4、申请名称为“不间断电源UPS、电源系统和电池容量测试的方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电力领域，并且更具体的，涉及不间断电源UPS、电源系统和电池容量测试的方法。
背景技术
不间断电源(uninterruptible power supply,UPS)系统是将电池与主机相连接，通过主机逆变器等模块电路将直流电转换成交流电的系统设备。UPS主要用于给单台计算机、计算机网络系统或其它电力电子设备如电磁阀、压力变送器等提供稳定、不间断的电力供应。当市电输入正常时，UPS将市电稳压后供应给负载使用，此时的UPS就是一台交流式电稳压器，同时它还可以向机内电池充电。当市电中断(事故停电)时，UPS立即将电池的直流电能，通过逆变器向负载继续供应交流电，使负载维持正常工作并保护负载软、硬件不受损坏。
由于系统的供电可靠性与电池的可靠性密切相关，因此系统需要在线测量电池的实时容量。在对储电池进行核对性容量测试时，一种方案，所有的电池组同时放电，放电深度一般为100％，此时可以准确检测出系统中电池的实施容量。但是，该方案在电池核对性容量测试结束后，UPS供电系统的电池备电时间基本为零，给系统带来供电安全隐患。
发明内容
本申请提供了不间断电源UPS、由所述UPS以及电池组组成的电源系统，以及电池容量测试的方法，能够准确检测出电源系统的电池总容量，并在容量测试以及市电异常时，电源系统备电时间充足。
第一方面，提供了一种不间断电源UPS，所述UPS与负载，以及至少两个电池组分别连接，所述UPS包括包括测试单元和确定单元，
所述测试单元用于对所述至少两个电池组中的每个电池组进行单独容量测试，获取所述每个电池组的电池容量，其中，所述单独容量测试包括在所述每个电池组与市电联合向所述负载进行供电的情况下，测量所述每个电池组的电池容量，同时除所述每个电池组之外的其他电池组不放电且具有备电；所述确定单元用于根据所述每个电池组的电池容量，确定所述至少两个电池的总电池容量。
因此，本申请实施例通过在每个电池组分别与市电联合对负载进行供电时，检测系统中每个电池组的电池容量，然后根据每个电池组的电池容量确定系统的电池总容量，并且 本申请实施例在检测每个电池组的电池容量时，除该被检测的电池组之外的其他电池组不进行放电且具有备电。基于此，本申请实施例既能够准确检测出系统的电池总容量，还能够保证在容量测试以及市电异常时，供电系统备电时间充足，降低系统的供电风险。
需要说明的是，本申请实施例中，电池组的电池容量，指的是电池组的实时容量，即在实际使用状态下，电池组完全充满电后实际放出的电量。
当维护人员掌握了各电池组的实时容量后，维护人员可以确定系统备电时间是否充足，并可以基于计算的系统备电时间决策是否需要对电池进行更换，消除系统备电时间不足带来的风险。
可选的，所述UPS还与所述每个电池组一一对应连接的至少两个控制电路连接，其中，所述至少两个控制电路中的每个控制电路连接于所述UPS与所述每个控制电路对应的电池组之间，其中，所述UPS具体用于通过所述每个控制电路控制与所述每个控制电路连接的电池组进行充电或放电。这样，本申请实施例能够实现通过该至少两个控制电路控制独立控制每个电池进行充电或放电，为单独容量测试提供了条件。
可选的，所述控制电路包括DC/DC电路。
可选的，所述测试单元还用于：在对所述每个电池组进行单独容量测试时，控制所述每个电池组对应的DC/DC电路的放电电压高于所述其他电池组对应的DC/DC电路的放电电压。
因此，通过控制每个电池组对应的DC/DC电路的放电电压高于其他电池组对应的DC/DC电路的放电电压，能够使得其他电池组的放电电流为0，即实现其他电池组不进行放电。
可选的，所述测试单元具体用于：在对所述每个电池组进行单独容量测试时，从所述每个电池组对应的DC/DC电路获取所述每个电池组的电池容量。也就是说，此时每个电池组对应的DC/DC电路检测对应的电池组的电压和放电电流，根据监测到的电池组的电压和放电电流，计算出该电池组的电池容量并发送给UPS。
可选的，所述测试单元在对所述每个电池组进行单独容量测试时，获取所述每个电池组的电压和放电电流，然后根据所述每个电池组的电压和放电电流，确定所述每个电池组的电池容量。也就是说，此时UPS用于检测每个电池组的电压和放电电流，并计算每个电池组的电池容量。
可选的，所述测试单元具体用于：在对所述每个电池组进行单独容量测试过程中，控制每个电池组由满电状态放电到电池电压为放电截止电压。这样，可以获得每个电池组的准确的电池容量，进而确定出准确的电池总容量。
可选的，还包括控制单元，用于在获取所述每个电池组的电池容量后，控制对所述每个电池组进行充电。
本申请实施例中，通过在对每个电池组的进行单独容量测试之后，对每个电池组进行充电，能够保证在对下一个电池组进行单独容量测试时，其他电池组是有电状态。保证在容量测试的过程中，供电系统的备电时间充足，降低系统的供电风险。
第二方面，提供了一种电源系统，包括第一方面以及第一方面任一种可能的实现方式中所述的UPS以及与所述UPS相连的至少两个电池组。
可选的，该电源系统还包括与所述每个电池组一一对应连接的至少两个控制电路，其 中，所述至少两个控制电路中的每个控制电路连接于所述UPS与所述每个控制电路对应的电池组之间，其中，所述UPS具体用于通过所述每个控制电路控制与所述每个控制电路连接的电池组进行充电或放电。
可选的，所述控制电路包括DC/DC电路。
第三方面，还提供了一种电池容量测试的方法，所述方法由不间断电源UPS执行，所述UPS与负载，以及至少两个电池组分别连接，所述方法包括：
对所述至少两个电池组中的每个电池组进行单独容量测试，获取所述每个电池组的电池容量，其中，所述单独容量测试包括在所述每个电池组与市电联合向所述负载进行供电的情况下，测量所述每个电池组的电池容量，同时除所述每个电池组之外的其他电池组不放电且具有备电；
根据所述每个电池组的电池容量，确定所述至少两个电池组的总电池容量。
可选的，所述UPS还与所述每个电池组一一对应连接的至少两个控制电路连接，其中，所述至少两个控制电路中的每个控制电路连接于所述UPS与所述每个控制电路对应的电池组之间，其中，所述UPS具体用于通过所述每个控制电路控制与所述每个控制电路连接的电池组进行充电或放电。
可选的，所述控制电路包括DC/DC电路。
可选的，在对所述每个电池组进行单独容量测试时，控制所述每个电池组对应的DC/DC电路的放电电压高于所述其他电池组对应的DC/DC电路的放电电压。
可选的，获取所述每个电池组的电池容量，包括：
从所述每个电池组对应的DC/DC电路获取所述每个电池组的电池容量。
可选的，获取所述每个电池组的电池容量，包括：
获取所述每个电池组的电压和放电电流；
根据所述每个电池组的电压和放电电流，确定所述每个电池组的电池容量。
可选的，在对所述每个电池组进行单独容量测试过程中，控制所述每个电池组由满电状态放电到电池电压为放电截止电压。
可选的，还包括：在获取所述每个电池组的电池容量后，控制对所述每个电池组进行充电。
因此，本申请实施例通过在每个电池组分别与市电联合对负载进行供电时，检测系统中每个电池组的电池容量，然后根据每个电池组的电池容量确定系统的电池总容量，并且本申请实施例在检测每个电池组的电池容量时，除该被检测的电池组之外的其他电池组不进行放电且具有备电。基于此，本申请实施例既能够准确检测出系统的电池总容量，还能够保证在容量测试以及市电异常时，供电系统备电时间充足，降低系统的供电风险。
附图说明
图1示出了本申请实施例提供的一种电源系统的示意图。
图2示出了本申请实施例提供的一种UPS的示意图。
图3示出了应用本申请实施例的一个供电系统的示意图。
图4示出了本申请实施例提供的一种电池容量检测的时序的示意图。
图5示出了一种不同的DC/DC单元的放电特性曲线的示例。
图6示出了另一种不同的DC/DC单元的放电特性曲线的示例。
图7示出了本申请实施例提供的一种电池容量测试的方法的示意性流程图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
图1示出了本申请实施例提供的一种电源系统100的示意图，该电源系统100可以应用于通信领域中的通信站点，或者应用到路灯系统、物业大厦、汽车充电站等民用设备领域中，用于提供稳定、不间断的电力供应。如图1所示，该电源系统100可以包括UPS110、负载120和至少两个电池组(例如图1中所示的电池组1、电池组2、电池组3)。
图2示出了UPS的一个示意性框图。如图2所示，该UPS包括测试单元210和确定单元220。
测试单元210，用于对所述至少两个电池组中的每个电池组进行单独容量测试，获取所述每个电池组的电池容量，其中，所述单独容量测试包括在所述每个电池组与市电联合向所述负载进行供电的情况下，测量所述每个电池组的电池容量，同时除所述每个电池组之外的其他电池组不放电且具有备电。
确定单元220，用于根据所述每个电池组的电池容量，确定所述至少两个电池的总电池容量。
因此，本申请实施例通过在每个电池组分别与市电联合对负载进行供电时，检测系统中每个电池组的电池容量，然后根据每个电池组的电池容量确定系统的电池总容量，并且本申请实施例在检测每个电池组的电池容量时，除该被检测的电池组之外的其他电池组不进行放电且具有备电。基于此，本申请实施例既能够准确检测出系统的电池总容量，还能够保证在容量测试以及市电异常时，供电系统备电时间充足，降低系统的供电风险。
需要说明的是，本申请实施例中，电池组的电池容量，指的是电池组的实时容量，即在实际使用状态下，电池组完全充满电后实际放出的电量。
当维护人员掌握了各电池组的实时容量后，维护人员可以确定系统备电时间是否充足，并可以基于计算的系统备电时间决策是否需要对电池进行更换，消除系统备电时间不足带来的风险。
可选的，所述UPS还与所述每个电池组一一对应连接的至少两个控制电路连接，其中，所述至少两个控制电路中的每个控制电路连接于所述UPS与所述每个控制电路对应的电池组之间，其中，所述UPS具体用于通过所述每个控制电路控制与所述每个控制电路连接的电池组进行充电或放电。
这样，本申请实施例能够实现UPS通过该至少两个控制电路控制独立控制每个电池进行充电或放电，为单独容量测试提供了条件。
可选的，所述控制电路包括DC/DC电路。
可选的，所述测试单元210在对所述每个电池组进行单独容量测试时，控制所述每个电池组对应的DC/DC电路的放电电压高于所述其他电池组对应的DC/DC电路的放电电压。
因此，通过控制每个电池组对应的DC/DC电路的放电电压高于其他电池组对应的DC/DC电路的放电电压，能够使得其他电池组的放电电流为0，即实现其他电池组不进行 放电。
可选的，所述测试单元210具体用于在对所述每个电池组进行单独容量测试时，从所述每个电池组对应的DC/DC电路获取所述每个电池组的电池容量。也就是说，此时每个电池组对应的DC/DC电路检测对应的电池组的电压和放电电流，根据监测到的电池组的电压和放电电流，计算出该电池组的电池容量并发送给UPS。
可选的，所述测试单元210在对所述每个电池组进行单独容量测试时，获取所述每个电池组的电压和放电电流，然后根据所述每个电池组的电压和放电电流，确定所述每个电池组的电池容量。也就是说，此时UPS用于检测每个电池组的电压和放电电流，并计算每个电池组的电池容量。
可选的，所述测试单元210具体用于在对所述每个电池组进行单独容量测试过程中，控制所述每个电池组由满电状态放电到电池电压为放电截止电压。这样，可以获得每个电池组的准确的电池容量，进而确定出准确的电池总容量。
可选的，UPS 110还包括控制单元，用于在获取所述每个电池组的电池容量后，控制对所述每个电池组进行充电。
本申请实施例中，通过在对每个电池组的进行单独容量测试之后，对每个电池组进行充电，能够保证在对下一个电池组进行单独容量测试时，其他电池组是有电状态。保证在容量测试的过程中，供电系统的备电时间充足，降低系统的供电风险。
图3示出了应用本申请实施例的一个供电系统的示意图。如图3所示，供电系统可以包括UPS、负载和多组电池组。电池组例如包括电池组1至电池组N，N为大于1的整数。当市电输入正常时，由市电提供能量使得UPS输出至负载，并且UPS能够给电池组充电。当市电异常时，UPS控制电池组放电，由电池组提供能量使得UPS输出负载，电池组处于放电状态。
本申请实施例中，UPS还能够控制市电和电池组联合对负载进行供电，即负载的一部分能量提供来自市电，一部分能量提供来自电池组。这样，系统负载可以由市电和电池组同时承担，为单组电池组(或者两组电池组，多组电池组等)放电提供了前提条件。
可选的，供电系统还可以包括直流转换器(direct current to direct current，DC/DC)单元，每个电池组分别通过DC/DC单元与UPS连接。例如，电池组1与UPS通过DC/DC单元1连接，电池组N与UPS通过DC/DC单元N连接。
具体的，DC/DC单元可以为上文中控制电路的一个示例。DC/DC单元也可以称为DC/DC电路。
一种可能的设计，DC/DC单元可以通过通讯总线与UPS连接，通讯总线可以传输指令或数据。其中，DC/DC单元作为与电池组连接的控制模块，可以在UPS的管控下，控制所述每个电池组进行充电或放电。因此，本申请实施例通过在每个电池组上设置DC/DC单元，UPS能够实现通过所述每个电池组的DC/DC单元独立控制每个电池组进行放电或充电。
需要说明的是，由于每个电池组分别通过DC/DC单元与UPS连接，因此可以实现对每个电池组的充电或放电状态进行独立控制，这样能够为实现单组电池组(或者两组电池组，多组电池组等)放电提供前提条件。具体而言，通过DC/DC单元，可以独立控制每组电池组的放电电流和放电电压。比如，可以实现电池组1放电，同时电池组2处于非充 电非放电的状态。
可选的，一些实施例中，在所述电池组与市电联合供电时，可以分别确定放电电池组的放电电流和电压。然后根据放电电池组的放电电流和电压，确定该放电电池组的电池容量。作为示例，放电电流可以为系统预先设定的电池容量检测所需的放电电流。
一些可能的实现方式中，DC/DC单元可以检测电池组的电压信息和电流信息，或者UPS可以检测电池组的电压信息和电流信息，本申请实对此不作限定。这里，DC/DC单元以及UPS可以作为图1中的控制器110的示例。
可选的，本申请实施例中，在获取所述每个电池组的电池容量之后，还可以对所述每个电池组进行充电。
一种可能的情况，在市电正常供电的情况下，电池组1、电池组2……电池组N按照次序进行电池放电和容量检测。当一组电池组完成电池放电和容量检测后可以对该组电池组充满电，然后进行下一组电池组的放电和容量检测。整个时序运行完成后，则能够计算所有电池组组的实时电池容量。
图4示出了本申请实施例提供的一种电池容量检测的时序的示意图。如图4所示，在T1时间段，所有电池组均处于充电或静置状态。T1时间段结束时所有电池组均处于充满的状态，以确保在T2时间段对电池组1进行放电做容量检测前，电池组1是充满的状态，同时可保证系统的备电时间是充足的。在T2时间段对电池组1做放电和容量检测，并计算电池组1的实时电池容量，此时其他电池组不对UPS供电。在T3时间段，所有电池组均处于充电或静置状态，T3时间段结束时所有电池组均处于充满的状态，以确保在T4时间段对电池组2进行放电做容量检测前电池组2是充满的状态，同时可保证系统的备电时间是充足的。在T4时间段对电池组2做放电和容量检测，并计算电池组2的实时电池容量，此时其他电池组不对UPS供电。依次类推。
一些可能的示例，UPS和/或DC/DC单元中可以存储有该电池容量检测的时序。当UPS中存储有该时序时，UPS与各个DC/DC单元之间可以具有数据通讯，用于协调系统在做电池容量检测时的充电和放电时序。
可选的，当市电在电池自检的时间段发生异常时，所有电池组都会转电池放电状态，保障系统供电的不间断。
一种可能的方式，在某组电池组进行放电和容量检测时，其他电池组也可以设置为处于放电状态。但是，此时进行放电和容量检测的电池组的DC/DC单元的放电电压设定值高于其他电池组的DC/DC单元的放电电压设定值。这样，则其他电池组的DC/DC单元所在电路的输出电流会为0，仅有处于电池放电和容量检测的DC/DC单元有实际的给UPS供电的电流，即实现了只有该组电池组可以放电的目的。
图5示出了电池组进行放电和容量检测时不同的DC/DC单元的放电特性曲线的示例。如图5所示，在控制上采用下垂算法，输出电流越大则输出DC/DC端口电压越低。如图5所示，处于容量检测的电池组的放电特性曲线中，在放电电流为电池容量检测电流时，输出DC/DC端口电压高于处于非容量检测的电池组的放电特性曲线的最高输出电压。也就是说，表示DC/DC端口电压的虚线与处于非容量检测的电池组的放电特性曲线没有交点，因此处于非容量检测的电池组的放电电流为0。
当市电在电池进行放电和容量检测的时间段发生异常时，需要所有电池组都转变为电 池供电状态时，原来处于容量检测状态的电池组恢复到正常放电状态。作为示例，可以调整处于容量检测状态的电池组对应的DC/DC放电参考电压，所有电池都均衡分担负载。
图6示出了当市电在电池进行放电和容量检测的时间段发生异常时，不同的DC/DC单元的放电特性曲线的示例。如图6所示，处于容量检测的电池组的放电特性曲线与处于非容量检测的电池组的放电特性曲线重合。
因此，本申请实施例通过在每个电池组分别与市电联合对负载进行供电时，检测系统中每个电池组的电池容量，然后根据每个电池组的电池容量确定系统的电池总容量，并且本申请实施例在检测每个电池组的电池容量时，除该被检测的电池组之外的其他电池组不进行放电且具有备电。基于此，本申请实施例既能够准确检测出系统的电池总容量，还能够保证在容量测试以及市电异常时，供电系统备电时间充足，降低系统的供电风险。
本申请实施例还提供了一种电源系统，包括上文中所述的任一种UPS以及与所述UPS相连的至少两个电池组。可选的，该UPS包括上文中所述的控制电路。
图7示出了本申请实施例还提供了一种电池容量测试的方法的示意性流程图，该方法应由UPS执行，所述UPS与负载，以及至少两个电池组分别连接，所述方法包括：
710，对所述至少两个电池组中的每个电池组进行单独容量测试，获取所述每个电池组的电池容量，其中，所述单独容量测试包括在所述每个电池组与市电联合向所述负载进行供电的情况下，测量所述每个电池组的电池容量，同时除所述每个电池组之外的其他电池组不放电且具有备电。
720，根据所述每个电池组的电池容量，确定所述至少两个电池组的总电池容量。
可选的，所述UPS还与所述每个电池组一一对应连接的至少两个控制电路连接，其中，所述至少两个控制电路中的每个控制电路连接于所述UPS与所述每个控制电路对应的电池组之间，其中，所述UPS具体用于通过所述每个控制电路控制与所述每个控制电路连接的电池组进行充电或放电。
可选的，所述控制电路包括DC/DC电路。
可选的，在对所述每个电池组进行单独容量测试时，控制所述每个电池组对应的DC/DC电路的放电电压高于所述其他电池组对应的DC/DC电路的放电电压。
可选的，获取所述每个电池组的电池容量，包括：
从所述每个电池组对应的DC/DC电路获取所述每个电池组的电池容量。
可选的，获取所述每个电池组的电池容量，包括：
获取所述每个电池组的电压和放电电流；
根据所述每个电池组的电压和放电电流，确定所述每个电池组的电池容量。
可选的，在对所述每个电池组进行单独容量测试过程中，控制所述每个电池组由满电状态放电到电池电压为放电截止电压。
可选的，在获取所述每个电池组的电池容量后，控制对所述每个电池组进行充电。
具体的，图7中所示的各个步骤可以参见上文对应的各个装置模块的描述，为了简洁，这里不再赘述。
因此，本申请实施例通过在每个电池组分别与市电联合对负载进行供电时，检测系统中每个电池组的电池容量，然后根据每个电池组的电池容量确定系统的电池总容量，并且本申请实施例在检测每个电池组的电池容量时，除该被检测的电池组之外的其他电池组不 进行放电且具有备电。基于此，本申请实施例既能够准确检测出系统的电池总容量，还能够保证在容量测试以及市电异常时，供电系统备电时间充足，降低系统的供电风险。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (19)

  1. 一种不间断电源UPS，其特征在于，所述UPS与负载，以及至少两个电池组分别连接，所述UPS包括测试单元和确定单元，
    所述测试单元用于对所述至少两个电池组中的每个电池组进行单独容量测试，获取所述每个电池组的电池容量，其中，所述单独容量测试包括在所述每个电池组与市电联合向所述负载进行供电的情况下，测量所述每个电池组的电池容量，同时除所述每个电池组之外的其他电池组不放电且具有备电；
    所述确定单元用于根据所述每个电池组的电池容量，确定所述至少两个电池组的总电池容量。
  2. 根据权利要求1所述的UPS，其特征在于，所述UPS还与所述每个电池组一一对应连接的至少两个控制电路连接，其中，所述至少两个控制电路中的每个控制电路连接于所述UPS与所述每个控制电路对应的电池组之间，其中，所述UPS具体用于通过所述每个控制电路控制与所述每个控制电路连接的电池组进行充电或放电。
  3. 根据权利要求2所述的UPS，其特征在于，所述控制电路包括DC/DC电路。
  4. 根据权利要求3所述的UPS，其特征在于，所述测试单元还用于：
    在对所述每个电池组进行单独容量测试时，控制所述每个电池组对应的DC/DC电路的放电电压高于所述其他电池组对应的DC/DC电路的放电电压。
  5. 根据权利要求3所述的UPS，其特征在于，所述测试单元具体用于：
    在对所述每个电池组进行单独容量测试时，从所述每个电池组对应的DC/DC电路获取所述每个电池组的电池容量。
  6. 根据权利要求1-4任一项所述的UPS，其特征在于，所述测试单元具体用于：
    在对所述每个电池组进行单独容量测试时，获取所述每个电池组的电压和放电电流；
    根据所述每个电池组的电压和放电电流，确定所述每个电池组的电池容量。
  7. 根据权利要求5或6所述的UPS，其特征在于，所述测试单元具体用于：
    在对所述每个电池组进行单独容量测试过程中，控制所述每个电池组由满电状态放电到电池电压为放电截止电压。
  8. 根据权利要求1-7任一项所述的UPS，其特征在于，还包括控制单元，用于：
    在获取所述每个电池组的电池容量后，控制对所述每个电池组进行充电。
  9. 一种电源系统，其特征在于，包括如权利要求1-8任一项所述的UPS以及与所述UPS相连的至少两个电池组。
  10. 根据权利要求9所述的电源系统，其特征在于，还包括与所述每个电池组一一对应连接的至少两个控制电路，其中，所述至少两个控制电路中的每个控制电路连接于所述UPS与所述每个控制电路对应的电池组之间，其中，所述UPS具体用于通过所述每个控制电路控制与所述每个控制电路连接的电池组进行充电或放电。
  11. 根据权利要求10所述的电源系统，其特征在于，所述控制电路包括DC/DC电路。
  12. 一种电池容量测试的方法，其特征在于，所述方法由不间断电源UPS执行，所述UPS与负载，以及至少两个电池组分别连接，所述方法包括：
    对所述至少两个电池组中的每个电池组进行单独容量测试，获取所述每个电池组的电池容量，其中，所述单独容量测试包括在所述每个电池组与市电联合向所述负载进行供电的情况下，测量所述每个电池组的电池容量，同时除所述每个电池组之外的其他电池组不放电且具有备电；
    根据所述每个电池组的电池容量，确定所述至少两个电池组的总电池容量。
  13. 根据权利要求12所述的方法，其特征在于，所述UPS还与所述每个电池组一一对应连接的至少两个控制电路连接，其中，所述至少两个控制电路中的每个控制电路连接于所述UPS与所述每个控制电路对应的电池组之间，其中，所述UPS具体用于通过所述每个控制电路控制与所述每个控制电路连接的电池组进行充电或放电。
  14. 根据权利要求13所述的方法，其特征在于，所述控制电路包括DC/DC电路。
  15. 根据权利要求14所述的方法，其特征在于，
    在对所述每个电池组进行单独容量测试时，控制所述每个电池组对应的DC/DC电路的放电电压高于所述其他电池组对应的DC/DC电路的放电电压。
  16. 根据权利要求14所述的方法，其特征在于，获取所述每个电池组的电池容量，包括：
    从所述每个电池组对应的DC/DC电路获取所述每个电池组的电池容量。
  17. 根据权利要求12-16任一项所述的方法，其特征在于，获取所述每个电池组的电池容量，包括：
    获取所述每个电池组的电压和放电电流；
    根据所述每个电池组的电压和放电电流，确定所述每个电池组的电池容量。
  18. 根据权利要求16或17所述的方法，其特征在于，在对所述每个电池组进行单独容量测试过程中，控制所述每个电池组由满电状态放电到电池电压为放电截止电压。
  19. 根据权利要求12-18任一项所述的方法，其特征在于，还包括：
    在获取所述每个电池组的电池容量后，控制对所述每个电池组进行充电。
PCT/CN2020/091688 2019-05-23 2020-05-22 不间断电源ups、电源系统和电池容量测试的方法 Ceased WO2020233693A1 (zh)

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