WO2024109401A1 - 储能系统和黑启动装置 - Google Patents

储能系统和黑启动装置 Download PDF

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Publication number
WO2024109401A1
WO2024109401A1 PCT/CN2023/125157 CN2023125157W WO2024109401A1 WO 2024109401 A1 WO2024109401 A1 WO 2024109401A1 CN 2023125157 W CN2023125157 W CN 2023125157W WO 2024109401 A1 WO2024109401 A1 WO 2024109401A1
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WO
WIPO (PCT)
Prior art keywords
battery
energy storage
target
power supply
black start
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/125157
Other languages
English (en)
French (fr)
Inventor
李建山
袁通
张涛
余士江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Digital Power Technologies Co Ltd
Original Assignee
Huawei Digital Power Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Digital Power Technologies Co Ltd filed Critical Huawei Digital Power Technologies Co Ltd
Priority to EP23893493.9A priority Critical patent/EP4607752A4/en
Publication of WO2024109401A1 publication Critical patent/WO2024109401A1/zh
Priority to US19/216,576 priority patent/US20250286403A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/28—Arrangements for balancing of the load in networks by storage of energy
    • H02J3/32—Arrangements for balancing of the load in networks by storage of energy using batteries or super capacitors with converting means
    • 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
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/96—Regulation of charging or discharging current or voltage in response to battery voltage
    • 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
    • H02J2207/00—Details of circuit arrangements for charging or discharging batteries or supplying loads from batteries
    • H02J2207/10—Control circuit supply, e.g. means for supplying power to the control circuit
    • 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
    • H02J2207/00—Details of circuit arrangements for charging or discharging batteries or supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • 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
    • H02J9/061—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 DC powered loads

Definitions

  • the present application relates to the field of electronic power, and in particular to an energy storage system and a black start device.
  • Black start means that after the entire system stops operating due to a fault, it does not rely on the help of other networks. Through the start-up of the units with self-starting capability in the system, the units without self-starting capability are driven to gradually expand the recovery range of the system and finally realize the recovery of the entire system.
  • Black start is widely used in various energy storage systems. When the energy storage system is disconnected from the grid due to a fault, the energy storage system is in off-grid mode. The black start is used to trigger the battery module in the energy storage system to restore the connection between the off-grid system and the power equipment of the grid. Generally, the black start is achieved by an uninterrupted power supply (UPS) or by using the power of the battery cluster itself in the energy storage system.
  • UPS uninterrupted power supply
  • the black start solution powered by UPS requires the UPS device to provide a larger power supply, resulting in a higher black start cost.
  • the cluster-level battery bus in the energy storage system cannot be powered before starting, and the power of the battery cluster itself in the energy storage system cannot be used to achieve black start.
  • the embodiments of the present application provide an energy storage system and a black start device, which can solve the problem of achieving black start when a battery pack has a built-in battery optimizer, avoid the problems of poor starting experience, high cost, and low reliability caused by the need to install black start controls on all battery packs in a battery cluster, and reduce the power supply of the UPS when a black start is performed through the UPS, thereby significantly reducing the black start cost.
  • the present application provides an energy storage system, which includes a battery cluster and a black start busbar, wherein the battery cluster is coupled to an AC power grid, wherein the battery cluster includes a plurality of battery packs connected in series, wherein the battery pack includes an energy storage battery, a controller, and an auxiliary power supply connected in parallel with the energy storage battery, and wherein the auxiliary power supply is coupled to the black start busbar.
  • the plurality of battery packs include a target battery pack associated with a black start control, wherein the black start control is arranged between a target energy storage battery and a target auxiliary power supply in the target battery pack, wherein the black start control is used to conduct an electrical connection between a target energy storage battery in the target battery pack and a target auxiliary power supply when triggered, wherein the target auxiliary power supply is used to power a target controller in the target battery pack and the black start busbar based on the electric energy provided by the target energy storage battery, so as to trigger the black start busbar to power the auxiliary power supplies of other battery packs in the plurality of battery packs except the target battery pack.
  • the auxiliary power supply of each battery pack in the other battery packs is used to conduct an electrical connection with each energy storage battery of each battery pack based on the electric energy provided by the black start busbar, and to power the controller of each battery pack based on the electric energy provided by each energy storage battery.
  • the target battery pack among multiple battery packs conducts the electrical connection between the target energy storage battery in the target battery pack and the target auxiliary power supply through the black start control it carries, so that the target auxiliary power supply supplies power to the target controller and the black start bus in the target battery pack based on the electric energy provided by the target energy storage battery, so as to trigger the black start bus to supply power to the auxiliary power supplies of other battery packs in the multiple battery packs except the target battery pack.
  • the auxiliary power supply of each battery pack in the other battery packs is used to conduct the electrical connection with each energy storage battery of each battery pack based on the electric energy provided by the black start bus, and to supply power to the controller of each battery pack based on the electric energy provided by the energy storage battery.
  • the energy storage system triggers the black start control in a single target battery pack, so that the target battery pack draws power from the energy storage battery in the battery pack and supplies power to the black start bus, and supplies power to the auxiliary power supplies of other battery packs through the black start bus (to conduct the electrical connection between the auxiliary power supplies of other battery packs and the energy storage battery), thereby avoiding the problems of poor starting experience, high cost and low reliability caused by the need to install black start controls on all battery packs in the battery cluster.
  • the UPS power required for black start is very small (UPS only needs to power the process of conducting the electrical connection between the auxiliary power supply and the energy storage battery). When UPS is equipped, the capacity of UPS is reduced, achieving a significant reduction in black start costs.
  • the battery pack further includes an isolated power supply circuit, and the auxiliary power supply is connected in parallel to the black start bus through the isolated power supply circuit.
  • the isolated power supply circuit is used to transmit the electric energy from the black start bus to the auxiliary power supply in an electrically isolated manner.
  • the above-mentioned isolation power supply circuit includes a first isolation optocoupler, the input end of the above-mentioned first isolation optocoupler is coupled to the above-mentioned black start bus, and the above-mentioned energy storage battery is connected to the black start bus through the output end of the above-mentioned first isolation optocoupler. Connected to the start port of the auxiliary power supply.
  • the first isolation optocoupler is used to transmit the electric energy at the input end of the first isolation optocoupler to the output end of the first isolation optocoupler to conduct the electrical connection between the energy storage battery and the start port of the auxiliary power supply.
  • the light emitting diode in the first isolation optocoupler converts the input electric energy into an optical signal and transmits it to the photosensitive tube and converts it into electric energy output, so that the black start bus and the battery pack can transmit electric energy under electrical isolation, thereby preventing interference caused by the electrical connection between the black start bus and the battery pack.
  • the output end of the first isolation optocoupler in the target battery pack is connected in parallel with the black start control between the target energy storage battery in the target battery pack and the start port of the target auxiliary power supply
  • the target isolation power supply circuit in the target battery pack also includes an isolation winding
  • the power supply port of the target auxiliary power supply is connected to the black start bus through the isolation winding.
  • the target auxiliary power supply is used to draw power from the target energy storage battery and supply power to the black start bus through the isolation winding.
  • the energy storage system triggers the black start control in a single target battery pack so that the target battery pack draws power from the energy storage battery in the battery pack and supplies power to the black start bus, and supplies power to the auxiliary power supplies of other battery packs through the black start bus (to conduct the electrical connection between the auxiliary power supplies of other battery packs and the energy storage batteries), thereby avoiding the problems of poor starting experience, high cost and low reliability caused by the need to install black start controls on all battery packs in the battery cluster.
  • the target isolated power supply circuit further includes a voltage adjustment unit, and the primary winding of the isolation winding is connected to the target auxiliary power supply through the voltage adjustment unit.
  • the target controller in the target battery pack is used to control the voltage adjustment unit to perform voltage conversion on the output voltage of the target auxiliary power supply, so as to output the target voltage to the black start bus through the isolation winding.
  • the voltage adjustment unit performs voltage conversion on the output voltage of the power supply port of the auxiliary power supply, so that the isolation winding further converts the voltage output by the voltage adjustment unit and performs corresponding on-off control, and the secondary winding of the isolation winding outputs the target voltage to the black start bus.
  • the black start bus can transmit a black start signal to other battery packs in the battery cluster based on the isolated power supply of the auxiliary power supply through the isolation winding, so that the auxiliary power supplies in other battery packs except the target battery pack are started.
  • the target isolation power supply circuit further includes a voltage adjustment unit and a second isolation optocoupler, and the secondary winding of the isolation winding is connected to the black start bus through the voltage adjustment unit.
  • the input end of the second isolation optocoupler is connected to the target controller in the target battery pack, and the output end of the second isolation optocoupler is connected to the voltage adjustment unit.
  • the target controller in the target battery pack is used to send a control instruction to the voltage adjustment unit through the second isolation optocoupler, and the control instruction is used to control the voltage adjustment unit to perform voltage conversion on the secondary winding voltage of the isolation winding, so as to output the target voltage to the black start bus through the isolation winding.
  • the light-emitting diode in the second isolation optocoupler converts the input electrical energy into an optical signal and transmits it to the photosensitive tube and converts it into electrical energy output, so that electrical energy is transmitted between the black start bus and the battery pack without direct electrical connection, thereby preventing interference caused by electrical connection between the black start bus and the battery pack, and achieving good electrical energy transmission effect.
  • the energy storage system further includes an uninterruptible power supply UPS
  • the UPS is coupled to the black start bus
  • the UPS is used to power the black start bus, triggering the black start bus to power the auxiliary power supply in the multiple battery packs.
  • the black start method of powering the black start bus by UPS eliminates the process of triggering the black start control (such as pressing a button), and the UPS only needs to power the process of conducting the electrical connection between the auxiliary power supply and the energy storage battery (equivalent to powering the diode of the first isolation optocoupler in each battery pack), and its power supply current only needs a few milliamperes.
  • the power of the UPS is only at the level of tens or hundreds of watts, which is far lower than the solution of UPS directly powering the single board in each battery pack, reducing the power capacity of the UPS and achieving a significant reduction in the black start cost.
  • each of the multiple battery packs further includes a first switch tube and a second switch tube, the first switch tube is connected in series with the energy storage battery of each battery pack, the second switch tube is connected in parallel with the energy storage battery of each battery pack, and the controller of each battery pack is used to control the first switch tube of each battery pack to be turned on and the second switch tube to be turned off, so as to connect the energy storage batteries in each battery pack in series to the battery cluster bus.
  • the energy storage system uses the power supply of the black start bus to achieve black start, which solves the problem that the battery cluster bus is out of power and cannot be started from the cluster level when the battery optimizer (which may include the first switch tube and the second switch tube) is built into the battery pack, and has strong applicability.
  • the battery optimizer which may include the first switch tube and the second switch tube
  • the present application provides a black start device, which is used in an energy storage system.
  • the energy storage system includes a battery cluster and a black start bus.
  • the battery cluster includes multiple battery packs connected in series.
  • the battery pack includes energy storage batteries, a controller, and an auxiliary power supply connected in parallel with the energy storage batteries.
  • the auxiliary power supply is coupled to the black start bus.
  • the black start device includes a black start control. The black start control is used to conduct the electrical connection between the target energy storage battery of the target battery pack in the multiple battery packs and the target auxiliary power supply when triggered.
  • the target auxiliary power supply is used to power the target controller in the target battery pack and the black start bus based on the electric energy provided by the target energy storage battery, so as to trigger the black start bus to power the auxiliary power supplies of other battery packs in the multiple battery packs except the target battery pack.
  • the black start device is used to conduct the electrical connection with each energy storage battery of each battery pack based on the electric energy provided by the black start bus through the auxiliary power supply of each battery pack in the other battery packs, and to power the controller of each battery pack based on the electric energy provided by the energy storage battery.
  • the target battery pack among multiple battery packs conducts the electrical connection between the target energy storage battery in the target battery pack and the target auxiliary power supply through the black start control it carries, so that the target auxiliary power supply supplies power to the target controller and the black start bus in the target battery pack based on the electric energy provided by the target energy storage battery, so as to trigger the black start bus to supply power to the auxiliary power supplies of other battery packs in the multiple battery packs except the target battery pack.
  • the auxiliary power supply of each battery pack in the other battery packs is used to conduct the electrical connection with each energy storage battery of each battery pack based on the electric energy provided by the black start bus, and to supply power to the controller of each battery pack based on the electric energy provided by the energy storage battery.
  • the energy storage system triggers the black start control in a single target battery pack, so that the target battery pack draws power from the energy storage battery in the battery pack and supplies power to the black start bus, and supplies power to the auxiliary power supplies of other battery packs through the black start bus (to conduct the electrical connection between the auxiliary power supplies of other battery packs and the energy storage battery), thereby avoiding the problems of poor starting experience, high cost and low reliability caused by the need to install black start controls on all battery packs in the battery cluster.
  • the UPS power required for black start is very small (UPS only needs to power the process of conducting the electrical connection between the auxiliary power supply and the energy storage battery). When UPS is equipped, the capacity of UPS is reduced, achieving a significant reduction in black start costs.
  • the black start device further includes an isolated power supply circuit, and the auxiliary power supply is connected in parallel to the black start bus through the isolated power supply circuit.
  • the isolated power supply circuit includes a first isolated optocoupler, the input end of the first isolated optocoupler is coupled to the black start bus, the energy storage battery is connected to the start port of the auxiliary power supply through the output end of the first isolated optocoupler, and the first isolated optocoupler is used to transmit the electrical energy at the input end of the first isolated optocoupler to the output end of the first isolated optocoupler to conduct the electrical connection between the energy storage battery and the start port of the auxiliary power supply.
  • the light emitting diode in the first isolated optocoupler converts the input electrical energy into an optical signal and transmits it to the photosensitive tube and converts it into electrical energy output, so that the black start bus and the battery pack can transmit electrical energy under electrical isolation, thereby preventing interference caused by the electrical connection between the black start bus and the battery pack.
  • FIG1 is a schematic diagram of an application scenario of an energy storage system provided in the present application.
  • FIG2 is a schematic diagram of a structure of an energy storage system provided by the present application.
  • FIG3 is a schematic diagram of a structure of a battery pack provided by the present application.
  • FIG4 is another schematic diagram of the structure of the battery pack provided by the present application.
  • FIG. 5 is another schematic diagram of the structure of the energy storage system provided in the present application.
  • the energy storage system provided by the present application may include a battery cluster and a black start bus, and the battery cluster may include multiple battery packs connected in series (for example, battery pack 1, battery pack 2, ..., battery pack n, etc. connected in series), and the multiple battery packs connected in series are connected to the battery cluster bus, and the battery cluster is coupled to the DC end of the DC/AC converter through a cluster-level DC/DC converter, and the AC end of the DC/AC converter is coupled to the AC power grid.
  • the cluster-level DC/DC converter can perform voltage conversion (which can be boost, buck, etc.) on the DC power output by the battery cluster in the energy storage system (which can be the DC power output by each battery pack), and the DC/AC converter can perform inversion conversion on the DC power output by the cluster-level DC/DC converter, and output the AC power obtained after the inversion conversion to the AC power grid to power the battery, communication base station or household appliances in the AC power grid.
  • voltage conversion which can be boost, buck, etc.
  • the DC/AC converter can perform inversion conversion on the DC power output by the cluster-level DC/DC converter, and output the AC power obtained after the inversion conversion to the AC power grid to power the battery, communication base station or household appliances in the AC power grid.
  • the battery cluster in FIG1 can be directly coupled to the DC end of the DC/AC converter, and the AC end of the DC/AC converter is coupled to the AC grid.
  • the DC/AC converter can invert the DC power output by the battery cluster in the energy storage system, and output the AC power obtained after the inversion to the AC grid to power the battery, communication base station or household appliances in the AC grid.
  • a black start method can be used to restore the connection between the energy storage system and the electrical equipment of the grid, and the battery cluster in the energy storage system can be used to power the AC grid.
  • the current black start is to support the control process of the energy storage system reconnecting to the AC grid by supplying power through an uninterrupted power supply (UPS) when the energy storage system is disconnected from the grid due to a fault, or to achieve black start by using the power of the battery cluster itself in the energy storage system.
  • UPS uninterrupted power supply
  • the black start solution using UPS power supply requires the UPS device to provide a large power supply.
  • the UPS supplies power to each single board in the battery pack to connect each battery pack to the AC grid.
  • the UPS power required to power a black start process of an energy storage system will be very large, and the UPS power requirement is high, resulting in a high black start cost.
  • the cluster-level battery bus in the energy storage system may not be able to supply power before starting.
  • the battery pack is equipped with a battery optimizer.
  • the function of the battery optimizer is to control the switch tube in the battery pack to control the switching in and out of the energy storage battery to achieve the balance of the battery pack when the voltage of the energy storage battery in the battery pack is unbalanced.
  • Each switch tube needs to be powered to realize the conduction and shutdown of the switch tube, and the switch tube in the battery pack is turned off by default, so the cluster-level battery bus in the energy storage system is powered on before starting. If the system cannot supply power before starting, the battery cluster itself cannot be used to achieve black start when equipped with a battery optimizer, which has low applicability.
  • the battery pack in the energy storage system includes an energy storage battery and a switch tube, and the battery pack also includes a controller and an auxiliary power supply connected in parallel with the energy storage battery.
  • the above-mentioned auxiliary power supply is coupled to the black start bus
  • the multiple battery packs include a target battery pack carrying a black start control (for the convenience of description, it can be referred to as a target battery pack), and the target battery pack conducts the electrical connection between the target energy storage battery in the target battery pack and the target auxiliary power supply through the black start control it carries, so that the target auxiliary power supply supplies power to the black start bus based on the electric energy provided by the target energy storage battery, so as to trigger the black start bus to supply power to the auxiliary power supplies of other battery packs in the multiple battery packs except the target battery pack.
  • the auxiliary power supply of each battery pack in the other battery packs can conduct the electrical connection with the energy storage battery based on the electric energy provided by the black start bus, and power the controller based on the electric energy provided by the energy storage battery.
  • the controller can control the switch tube in each battery pack to turn on or off, so as to connect the energy storage batteries in each battery pack in series to the battery cluster bus.
  • the cluster-level DC/DC converter and DC/AC converter can be started based on the DC power provided by the battery pack in the battery cluster to supply power to the AC grid.
  • the energy storage system uses the power supply of the black start bus to achieve black start, which solves the problem that the battery cluster bus is out of power and cannot be started from the cluster level when the battery pack has a built-in battery optimizer.
  • UPS power required for black start is very small (UPS only needs to power the process of conducting the electrical connection between the auxiliary power supply and the energy storage battery), which reduces the power requirements of UPS and significantly reduces the cost of black start.
  • the energy storage system shown in Figure 2 includes a battery cluster and a black start bus.
  • the battery cluster may include multiple battery packs connected in series (for example, battery pack 1, battery pack 2, ..., battery pack n, etc. connected in series).
  • the multiple battery packs connected in series are connected to the battery cluster bus, and the battery cluster is coupled to the DC end of the DC/AC converter through a cluster-level DC/DC converter, and the AC end of the DC/AC converter is coupled to the AC power grid.
  • the cluster-level DC/DC converter can perform voltage conversion (which can be boost, buck, etc.) on the DC power output by the battery cluster in the energy storage system (which can be the DC power output by each battery pack), and the DC/AC converter can perform inversion conversion on the DC power output by the cluster-level DC/DC converter, and output the AC power obtained after the inversion conversion to the AC power grid to power the AC power grid.
  • voltage conversion which can be boost, buck, etc.
  • the DC/AC converter can perform inversion conversion on the DC power output by the cluster-level DC/DC converter, and output the AC power obtained after the inversion conversion to the AC power grid to power the AC power grid.
  • the battery cluster in FIG2 can be directly coupled to the DC end of the DC/AC converter, and the AC end of the DC/AC converter is coupled to the AC grid.
  • the DC/AC converter can invert the DC power output by the battery cluster in the energy storage system, and output the AC power obtained after the inversion conversion to the AC grid to power the battery, communication base station or household appliances in the AC grid.
  • each battery pack in the battery cluster may include an energy storage battery, a first switch tube connected in series with the energy storage battery, and a second switch tube connected in parallel with the energy storage battery.
  • battery pack 1 may include an energy storage battery, a first switch tube (for convenience of description, it may be represented as switch tube S1) and a second switch tube (for convenience of description, it may be represented as switch tube S2), the switch tube S1 is connected in series with the energy storage battery, and the switch tube S2 is connected in parallel with the energy storage battery.
  • the energy storage battery is connected in series to the battery cluster bus to access the AC power grid (it may be connected to the battery cluster bus and then coupled to the AC power grid through a cluster-level DC/DC converter and a DC/AC converter), and when the switch tube S1 is turned off and the switch tube S2 is turned on, the energy storage battery is cut out of the battery cluster bus.
  • the battery pack 1 may also include a controller (not shown in FIG. 2 ), an auxiliary power supply connected in parallel with the energy storage battery, and an isolated power supply circuit.
  • the auxiliary power supply is coupled to the black start busbar through the isolated power supply circuit.
  • the black start busbar can supply power to the battery pack 1.
  • the electric energy provided by the black start busbar is transmitted to the auxiliary power supply in the battery pack 1 in an electrically isolated form through the isolated power supply circuit.
  • the auxiliary power supply can be electrically connected to the energy storage battery based on the electric energy provided by the black start busbar, thereby supplying power to the controller in the battery pack 1 based on the electric energy provided by the energy storage battery.
  • the controller can control the switch tube S1 to be turned on to connect the energy storage battery in the battery pack 1 in series to the battery cluster busbar. It can be understood that the composition of other battery packs and the process of connecting to the battery cluster busbar can refer to the above description of the battery pack 1, and will not be repeated here.
  • the cluster-level DC/DC converter and the DC/AC converter can be started based on the direct current provided by the battery pack in the battery cluster (the direct current provided by the energy storage battery in the battery pack) to supply power to the AC grid.
  • the energy storage system uses the power supply of the black start busbar to achieve black start, which solves the problem that the battery cluster busbar is out of power and cannot be started from the cluster level when the battery pack has a built-in battery optimizer (which may include a first switch tube and a second switch tube), and has strong applicability.
  • the electric energy provided by the black start bus can come from the battery pack in the battery cluster.
  • the target battery pack in the battery cluster (which can be one or more of a plurality of battery packs connected in series.
  • the present application takes the target battery pack as one of a plurality of battery packs connected in series as an example for illustration, which will not be repeated in the following text) to supply power to the black start bus, and trigger the black start bus to supply power to the auxiliary power supply of other battery packs except the target battery pack as an example.
  • Figure 3 is a structural schematic diagram of the battery pack provided by the present application.
  • the battery pack in Figure 3 can be the target battery pack among the plurality of battery packs connected in series in the battery cluster.
  • the battery pack can include a first isolation optocoupler, the input end of the first isolation optocoupler is coupled to the black start bus, and the energy storage battery is connected to the start port of the auxiliary power supply through the output end of the first isolation optocoupler.
  • the black start bus supplies power to the auxiliary power supply in the battery pack
  • the first isolation optocoupler can transmit the electric energy from the input end of the isolation optocoupler to the output end, so as to transmit the electric energy in an electrically isolated manner.
  • the battery pack in Figure 3 also includes a controllable switch, and the auxiliary power supply can power the controller based on the power provided by the energy storage battery.
  • the controller can control the controllable switch to be turned on, thereby turning on the electrical connection between the energy storage battery and the auxiliary power supply, so that the auxiliary power supply can still maintain an electrical connection with the energy storage battery when the black start bus no longer provides power.
  • the light-emitting diode in the first isolation optocoupler converts the input electrical energy into an optical signal and transmits it to the photosensitive tube and converts it into electrical energy output, so that electrical energy is transmitted between the black start bus and the battery pack without a direct electrical connection, thereby preventing interference caused by the electrical connection between the black start bus and the battery pack, and the power supply effect is good.
  • the target battery pack in FIG. 3 includes a switch tube S1 connected in series with the energy storage battery and a switch tube S2 connected in parallel with the energy storage battery.
  • the switch tubes S1 and S2 are turned off by default and can be turned on or off by a controller.
  • the controller requires external power supply to control each switch tube.
  • the target battery pack in FIG. 3 may also include a black start control and an isolation winding.
  • the black start control may be a button.
  • the output end of the first isolation optocoupler in the target battery pack is connected in parallel with the black start control between the energy storage battery (for the convenience of description, it may be the target energy storage battery) and the start port of the auxiliary power supply (for the convenience of description, it may be the target auxiliary power supply) in the target battery pack.
  • the power supply port of the target auxiliary power supply is connected to the black start bus through the isolation winding.
  • the black start control can conduct the electrical connection between the target energy storage battery and the target auxiliary power supply when it is triggered (for example, a button is pressed and held for a period of time).
  • the target auxiliary power supply can power the target controller in the target battery pack based on the electric energy provided by the target energy storage battery, and supply power to the black start bus in isolation through the isolation winding, thereby triggering the black start bus to supply power to the auxiliary power supplies of other battery packs in the plurality of battery packs except the target battery pack, so that the auxiliary power supply of each battery pack conducts the electrical connection with each energy storage battery of each battery pack based on the electric energy provided by the black start bus (it can be the first isolation optocoupler in other battery packs that transmits the electric energy from the input end to the output end, so as to transmit the electric energy to the auxiliary power supply in an electrically isolated form).
  • FIG. 2 again.
  • the battery pack 1 can be the target battery pack, that is, the battery pack 1 includes a black start control (which can be a button) and an isolation winding.
  • a black start control which can be a button
  • the auxiliary power supply in the battery pack 1 can supply power to the black start bus in isolation through the isolation winding based on the electric energy provided by the energy storage battery.
  • the power supply power required by the black start bus is very small, generally in the milliwatt level.
  • Battery packs 2 to n in the battery cluster are not equipped with black start controls, and electric energy can be transmitted to battery packs 2 to n through the black start bus, so that the auxiliary power supplies in the above battery packs 2 to n are electrically connected to the energy storage battery based on the electric energy provided by the black start bus (it can be the first isolation optocoupler in other battery packs that transmits the electric energy from the input end to the output end, so as to transmit the electric energy to the auxiliary power supply in an electrically isolated form).
  • the auxiliary power supply in each battery pack can power the controller based on the electric energy provided by the energy storage battery, and the controller can control the first switch tube in each battery pack (for example, the switch tube S1 in the battery pack of Figure 2 or Figure 3) to be turned on to connect the energy storage battery in series to the battery cluster bus.
  • the energy storage system triggers the black start control in a single target battery pack, so that the target battery pack draws power from the energy storage battery in the battery pack and supplies power to the black start bus, and supplies power to the auxiliary power supply of other battery packs through the black start bus (to conduct the electrical connection between the auxiliary power supply of other battery packs and the energy storage battery), avoiding the problem of poor starting experience, high cost and low reliability caused by the need to install black start controls on all battery packs in the battery cluster.
  • the energy storage system uses auxiliary power to draw power from the energy storage battery to achieve black start, which solves the problem that the battery cluster bus is out of power and cannot be powered by cluster-level bus power supply when the battery pack has a built-in battery optimizer (which may include a first switch tube and a second switch tube), and has strong applicability.
  • a built-in battery optimizer which may include a first switch tube and a second switch tube
  • the battery pack may further include a voltage adjustment unit and a second isolation optocoupler.
  • the battery pack shown in FIG. 3 includes a first isolation optocoupler and a second isolation optocoupler.
  • the secondary winding of the isolation winding in the battery pack may be connected to the black start bus through the voltage adjustment unit.
  • the input end of the second isolation optocoupler is connected to the controller, and the output end of the second isolation optocoupler is connected to the voltage adjustment unit.
  • the controller may send a control instruction to the voltage adjustment unit through the second isolation optocoupler to control the voltage adjustment unit to perform voltage conversion on the secondary winding voltage of the isolation winding to output a target voltage to the black start bus (which may be a safe voltage lower than 60V, such as 48V, 36V, 24V, 15V, 12V, etc.).
  • the secondary winding voltage of the isolation winding may be a DC voltage obtained by voltage conversion of the output voltage of the isolation winding to the power supply port of the auxiliary power supply (which may be an output voltage obtained based on the power supply of the energy storage battery).
  • the controller can also send a control instruction to the voltage adjustment unit through the second isolation optocoupler to stop supplying power to the black start bus, so as to prevent the battery power of the energy storage battery from being consumed by continuous power supply when the black start is not needed.
  • the light emitting diode in the second isolation optocoupler converts the input electric energy into an optical signal and transmits it to the photosensitive tube and converts it into electric energy output, so that the black start bus and the battery pack can transmit electric energy without direct electrical connection, thus preventing interference caused by electrical connection between the black start bus and the battery pack, and achieving good electric energy transmission effect.
  • the primary winding of the isolated winding in the battery pack can be connected to the auxiliary power supply through the voltage adjustment unit.
  • Figure 4 is another structural schematic diagram of the battery pack provided by the present application. As shown in Figure 4, the primary winding of the isolated winding in the battery pack can be connected to the auxiliary power supply through the voltage adjustment unit. The controller in the battery pack is directly connected to the voltage adjustment unit.
  • the controller can send a control instruction to the above-mentioned voltage adjustment unit to control the above-mentioned voltage adjustment unit to perform voltage conversion on the output voltage of the power supply port of the auxiliary power supply, so that the isolation winding further converts the voltage output by the above-mentioned voltage adjustment unit, and the secondary winding of the isolation winding outputs the target voltage to the above-mentioned black start bus.
  • the secondary winding of the isolation winding can be connected to the black start bus through a transformer circuit, and the transformer circuit performs voltage conversion on the output voltage of the secondary winding of the isolation winding to output the target voltage to the black start bus.
  • the controller can also send a control instruction to the voltage adjustment unit to stop supplying power to the black start bus, so as to prevent continuous power supply when a black start is not needed, thereby consuming the battery power of the energy storage battery.
  • the energy storage system may further include an uninterruptible power supply UPS, which is coupled to the black start bus.
  • the UPS can supply power to the black start bus, so that the black start bus supplies power to the auxiliary power supply in the multiple battery packs connected in series to conduct the electrical connection between the auxiliary power supply and the energy storage battery (it may be the first isolation optocoupler in the battery pack that transmits the electrical energy at the input end to the output end, so as to transmit the electrical energy to the auxiliary power supply in the form of electrical isolation).
  • Figure 5 is another structural schematic diagram of the energy storage system provided by the present application.
  • the energy storage system may include a black start bus 1 and a black start bus 2, which are respectively connected to the battery cluster 1 and the battery cluster 2, and the UPS in the energy storage system is coupled to the black start bus 1 and the black start bus 2 through a voltage converter.
  • the voltage converter may be a voltage converter with DC voltage conversion (for example, when the UPS can provide DC voltage), and the voltage converter may also be a DC voltage converter with rectification and DC voltage conversion (for example, when the UPS can provide AC voltage), which can be determined according to the specific device type and is not limited here.
  • the UPS can supply power to the voltage converter, and the voltage converter performs voltage conversion to output the target voltage for the black start bus 1 and the black start bus 2, so that the black start bus 1 supplies power to the battery packs 1 to m connected in series in the battery cluster 1, and the black start bus 2 supplies power to the battery packs 1 to n connected in series in the battery cluster 2.
  • the first isolation optocoupler in each battery pack can transmit the electric energy at the input end to the output end to transmit the electric energy to the auxiliary power supply contained therein, thereby conducting the electrical connection between the auxiliary power supply and the energy storage battery.
  • the UPS only needs to supply power to the black start bus for the process of conducting the electrical connection between the auxiliary power supply and the energy storage battery (equivalent to supplying power to the diode of the first isolation optocoupler in each battery pack), and its supply current only needs a few milliamperes. Therefore, even if there are hundreds of battery packs in the energy storage system, the power of the UPS is only at the level of tens or hundreds of watts, which is far lower than the solution of the UPS directly supplying power to the single board in each battery pack, reducing the power capacity of the UPS and achieving a significant reduction in the black start cost.
  • the energy storage system may further include a remote centralized controller and a local start controller.
  • the remote centralized controller may communicate with the UPS and control the UPS to supply power to the voltage converter (which may be AC power supply or DC power supply).
  • the remote centralized controller may send a black start instruction to the local start controller, so that the local start controller communicates with the voltage converter and controls the voltage converter to output a target voltage to the black start bus (black start bus 1 and black start bus 2) coupled thereto so that the black start bus 1 supplies power to the battery packs 1 to m connected in series in the battery cluster 1, and the black start bus 2 supplies power to the battery packs 1 to n connected in series in the battery cluster 2.
  • the first isolation optocoupler in each battery pack may transmit the electric energy at the input end to the output end, so as to transmit the electric energy to the auxiliary power supply contained therein.
  • the auxiliary power supply supplies power to the controller in each battery pack, and the controller may control the first switch tube (e.g., the switch tube S1 in the battery pack of FIG. 2 or FIG. 3) in each battery pack to be turned on so as to connect the energy storage battery in series to the battery cluster bus.
  • the black start method of supplying power to the black start bus through the UPS eliminates the process of triggering the black start control (such as pressing a button), and the UPS only needs to supply power for the process of conducting the electrical connection between the auxiliary power supply and the energy storage battery (equivalent to supplying power to the diode of the first isolation optocoupler in each battery pack).
  • the power supply current only needs a few milliamperes. Therefore, even if there are hundreds of battery packs in the energy storage system, the power of the UPS is only tens or hundreds of watts, which is far lower than the solution of the UPS directly supplying power to the single board in each battery pack, thereby reducing the power capacity of the UPS and significantly reducing the black start cost.
  • the target battery pack among multiple battery packs conducts the electrical connection between the target energy storage battery in the target battery pack and the target auxiliary power supply through the black start control it carries, so that the target auxiliary power supply supplies power to the target controller and the black start bus in the target battery pack based on the electric energy provided by the target energy storage battery, so as to trigger the black start bus to supply power to the auxiliary power supplies of other battery packs in the multiple battery packs except the target battery pack.
  • the auxiliary power supply of each battery pack in the other battery packs is used to conduct the electrical connection with each energy storage battery of each battery pack based on the electric energy provided by the black start bus, and to power the controller of each battery pack based on the electric energy provided by each energy storage battery.
  • the energy storage system triggers the black start control in a single target battery pack, so that the target battery pack draws power from the energy storage battery in the battery pack and supplies power to the black start bus, and supplies power to the auxiliary power supplies of other battery packs through the black start bus (to conduct the electrical connection between the auxiliary power supplies of other battery packs and the energy storage battery), thereby avoiding the problems of poor starting experience, high cost and low reliability caused by the need to install black start controls on all battery packs in the battery cluster.
  • the energy storage system can also power the black start busbar through the UPS, so that the black start busbar supplies power to the auxiliary power supplies in the multiple battery packs connected in series, so that the auxiliary power supplies of each battery pack are electrically connected to each energy storage battery in each battery pack based on the power provided by the black start busbar (it can be the first isolation optocoupler in the battery pack that transmits the power at the input end to the output end, so as to transmit the power to the auxiliary power supply in an electrically isolated form).
  • the UPS only needs to power the black start busbar for the process of conducting the electrical connection between the auxiliary power supply and the energy storage battery (equivalent to powering the diode of the first isolation optocoupler in each battery pack), and its power supply current only needs a few milliamperes. Therefore, even if there are hundreds of battery packs in the energy storage system, the power of the UPS is only at the level of tens or hundreds of watts, which is far lower than the solution of the UPS directly powering the single board in each battery pack, reducing the power capacity of the UPS and achieving a significant reduction in black start costs.

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Abstract

本申请提供了一种储能系统和黑启动装置，储能系统中包括电池簇和黑启动母线，电池簇中包括串联的多个电池包。多个电池包中的目标电池包携带黑启动控件，黑启动控件用于在被触发时导通目标储能电池与目标辅助电源的电连接，目标辅助电源用于基于目标储能电池提供的电能为目标控制器和黑启动母线供电，以触发黑启动母线向其他电池包的辅助电源供电。其他电池包中的辅助电源用于基于黑启动母线提供的电能导通与储能电池的电连接，并基于各储能电池提供的电能为控制器供电。采用本申请，可避免所有电池包都需要安装黑启动控件导致的启动体验差、成本高、可靠性低的问题，以及在通过UPS进行黑启动时降低UPS供电功率，实现黑启动成本的显著降低。

Description

储能系统和黑启动装置
本申请要求在2022年11月23日提交中国国家知识产权局、申请号为202211476597.8的中国专利申请的优先权，发明名称为“储能系统和黑启动装置”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
本申请涉及电子电力领域，尤其涉及一种储能系统和黑启动装置。
背景技术
黑启动是指整个系统因故障停运后，不依赖别的网络的帮助，通过系统中具有自启动能力的机组的启动，带动无自启动能力的机组，逐步扩大系统的恢复范围，最终实现整个系统的恢复。黑启动广泛应用于各类储能系统，在储能系统因故障断开与电网的连接时，该储能系统处于离网模式，采用黑启动触发储能系统中电池模组，恢复离网系统与电网的用电设备的连接。一般通过不间断电源(Uninterrupted Power Supply，UPS)供电，或者利用储能系统中电池簇本身的电量实现黑启动。然而，对于大容量的储能系统(比包含几百个电池包的情况)，采用UPS供电的黑启动方案需要UPS设备提供较大的供电功率，导致黑启动成本较高。此外，当储能系统中的电池包不是持续接入母线的情况下，储能系统中的簇级电池母线在启动之前无法供电，则同样不能利用储能系统中电池簇本身的电量实现黑启动。
发明内容
本申请实施例提供一种储能系统和黑启动装置，可解决电池包内置电池优化器的情况下实现黑启动，避免了电池簇内所有电池包都需要安装黑启动控件导致的启动体验差、成本高、可靠性低的问题，以及在通过UPS进行黑启动时降低UPS的供电功率，实现黑启动成本的显著降低。
第一方面，本申请提供了一种储能系统，该储能系统中包括电池簇和黑启动母线，上述电池簇与交流电网耦合，上述电池簇中包括串联的多个电池包，上述电池包中包括储能电池、控制器以及与上述储能电池并联的辅助电源，上述辅助电源与上述黑启动母线耦合。上述多个电池包中包括关联黑启动控件的目标电池包，黑启动控件设置在目标电池包中的目标储能电池和目标辅助电源之间，上述黑启动控件用于在被触发时导通上述目标电池包中的目标储能电池与目标辅助电源的电连接，上述目标辅助电源用于基于上述目标储能电池提供的电能为上述目标电池包中的目标控制器和上述黑启动母线供电，以触发上述黑启动母线向上述多个电池包中除上述目标电池包的其他电池包的辅助电源供电。上述其他电池包中各电池包的辅助电源用于基于上述黑启动母线提供的电能导通与上述各电池包的各储能电池的电连接，并基于上述各储能电池提供的电能为上述各电池包的控制器供电。
在本申请中，多个电池包中的目标电池包通过其携带的黑启动控件导通目标电池包中的目标储能电池与目标辅助电源的电连接，使得目标辅助电源基于上述目标储能电池提供的电能为上述目标电池包中的目标控制器和上述黑启动母线供电，以触发上述黑启动母线向上述多个电池包中除上述目标电池包的其他电池包的辅助电源供电。上述其他电池包中各电池包的辅助电源用于基于上述黑启动母线提供的电能导通与上述各电池包的各储能电池的电连接，并基于上述各储能电池提供的电能为上述各电池包的控制器供电。储能系统通过触发单个目标电池包中的黑启动控件，使得目标电池包从该电池包中的储能电池取电并向黑启动母线供电，通过黑启动母线为其他电池包的辅助电源供电(以导通其他电池包的辅助电源和储能电池的电连接)，避免了电池簇内所有电池包都需要安装黑启动控件导致的启动体验差、成本高、可靠性低的问题。此外，通过UPS进行黑启动时需要的UPS功率很小(UPS只需对导通辅助电源与储能电池的电连接的过程进行供电)，在配备UPS的情况下降低了UPS的容量，实现黑启动成本的显著降低。
结合第一方面，在第一种可能的实施方式中，上述电池包中还包括隔离供电电路，上述辅助电源通过上述隔离供电电路并联至上述黑启动母线。上述隔离供电电路用于将来自上述黑启动母线的电能以电气隔离的方式传送至上述辅助电源。黑启动母线与电池簇(包)之间采用电气隔离形式能够有效避免电池包扩充带来的黑启动母线电压难以适配问题。
结合第一方面第一种可能的实施方式，在第二种可能的实施方式中，上述隔离供电电路包括第一隔离光耦，上述第一隔离光耦的输入端与上述黑启动母线耦合，上述储能电池通过上述第一隔离光耦的输出端 与上述辅助电源的启动端口连接。上述第一隔离光耦用于将上述第一隔离光耦的输入端的电能传送到上述第一隔离光耦的输出端，以导通上述储能电池与上述辅助电源的启动端口的电连接。这里，第一隔离光耦中的发光二极管把输入的电能转换为光信号传给光敏管并转换为电能输出，使得黑启动母线与电池包之间在电气隔离的情况下能够进行电能传输，防止因黑启动母线与电池包之间有电连接而引起的干扰。
结合第一方面第二种可能的实施方式，在第三种可能的实施方式中，上述目标电池包中的第一隔离光耦的输出端与上述黑启动控件并联连接在上述目标电池包中的目标储能电池与目标辅助电源的启动端口之间，上述目标电池包中的目标隔离供电电路还包括隔离绕组，上述目标辅助电源的供电端口通过上述隔离绕组与上述黑启动母线连接。上述目标辅助电源用于从上述目标储能电池取电，并通过上述隔离绕组向上述黑启动母线供电。储能系统通过触发单个目标电池包中的黑启动控件，使得目标电池包从该电池包中的储能电池取电并向黑启动母线供电，通过黑启动母线为其他电池包的辅助电源供电(以导通其他电池包的辅助电源和储能电池的电连接)，避免了电池簇内所有电池包都需要安装黑启动控件导致的启动体验差、成本高、可靠性低的问题。
结合第一方面第三种可能的实施方式，在第四种可能的实施方式中，上述目标隔离供电电路还包括电压调整单元，上述隔离绕组的原边绕组通过上述电压调整单元连接上述目标辅助电源。上述目标电池包中的目标控制器用于控制上述电压调整单元对上述目标辅助电源的输出电压进行电压变换，以通过上述隔离绕组向上述黑启动母线输出目标电压。这里，上述电压调整单元对辅助电源的供电端口的输出电压进行电压变换，使得隔离绕组对上述电压调整单元输出的电压进一步电压变换并进行相应的开通关断控制，隔离绕组的副边绕组向上述黑启动母线输出目标电压，黑启动母线可以基于辅助电源通过隔离绕组的隔离供电向电池簇中的其他电池包传送黑启动信号，使得除目标电池包之外的其他电池包中的辅助电源启动。
结合第一方面第四种可能的实施方式，在第五种可能的实施方式中，上述目标隔离供电电路还包括电压调整单元和第二隔离光耦，上述隔离绕组的副边绕组通过上述电压调整单元连接上述黑启动母线。上述第二隔离光耦的输入端连接上述目标电池包中的目标控制器，上述第二隔离光耦的输出端连接上述电压调整单元。上述目标电池包中的目标控制器用于通过上述第二隔离光耦向上述电压调整单元发送控制指令，上述控制指令用于控制上述电压调整单元对上述隔离绕组的副边绕组电压进行电压变换，以通过上述隔离绕组向上述黑启动母线输出目标电压。上述第二隔离光耦中的发光二极管把输入的电能转换为光信号传给光敏管并转换为电能输出，使得黑启动母线与电池包之间在没有直接的电气连接的情况下进行电能传输，防止因黑启动母线与电池包之间有电连接而引起的干扰，电能传输效果好。
结合第一方面至第一方面第五种可能的实施方式中任一种，在第六种可能的实施方式中，上述储能系统中还包括不间断电源UPS，上述UPS与上述黑启动母线耦合，上述UPS用于为上述黑启动母线供电，触发上述黑启动母线向上述多个电池包中的辅助电源供电。这里，通过UPS对黑启动母线供电的黑启动方式免去了触发黑启动控件的过程(比如按下按钮)，且UPS仅需为导通辅助电源与储能电池的电连接的过程供电(相当于为各电池包中的第一隔离光耦的二极管供电)，其供电电流只需要数毫安，因此即使储能系统中有几百个电池包，UPS的功率也仅仅是几十或几百瓦的水平，远远低于UPS直接为各电池包中的单板供电的方案，降低了UPS的功率容量，实现黑启动成本的显著降低。
结合第一方面至第一方面第六种可能的实施方式中任一种，在第七种可能的实施方式中，上述多个电池包中各电池包还包括第一开关管和第二开关管，上述第一开关管与上述各电池包的储能电池串联，上述第二开关管与上述各电池包的储能电池并联，上述各电池包的控制器用于控制上述各电池包的第一开关管导通以及第二开关管关断，以将上述各电池包中的储能电池串联接入电池簇母线。这里，储能系统利用黑启动母线的供电实现黑启动，解决了在电池包内置电池优化器(可以包括第一开关管和第二开关管)的情况下电池簇母线没电而不能从簇级启动的问题，适用性强。
第二方面，本申请提供了一种黑启动装置，上述黑启动装置用于储能系统，上述储能系统中包括电池簇和黑启动母线，上述电池簇中包括串联的多个电池包，上述电池包中包括储能电池、控制器以及与上述储能电池并联的辅助电源，上述辅助电源与上述黑启动母线耦合。上述黑启动装置包括黑启动控件，上述黑启动控件用于在被触发时导通上述多个电池包中的目标电池包的目标储能电池与目标辅助电源的电连接，上述目标辅助电源用于基于上述目标储能电池提供的电能为上述目标电池包中的目标控制器和上述黑启动母线供电，以触发上述黑启动母线向上述多个电池包中除上述目标电池包的其他电池包的辅助电源供电。上述黑启动装置用于通过上述其他电池包中各电池包的辅助电源用于基于上述黑启动母线提供的电能导通与上述各电池包的各储能电池的电连接，并基于上述各储能电池提供的电能为上述各电池包的控制器供电。
在本申请中，多个电池包中的目标电池包通过其携带的黑启动控件导通目标电池包中的目标储能电池与目标辅助电源的电连接，使得目标辅助电源基于上述目标储能电池提供的电能为上述目标电池包中的目标控制器和上述黑启动母线供电，以触发上述黑启动母线向上述多个电池包中除上述目标电池包的其他电池包的辅助电源供电。上述其他电池包中各电池包的辅助电源用于基于上述黑启动母线提供的电能导通与上述各电池包的各储能电池的电连接，并基于上述各储能电池提供的电能为上述各电池包的控制器供电。储能系统通过触发单个目标电池包中的黑启动控件，使得目标电池包从该电池包中的储能电池取电并向黑启动母线供电，通过黑启动母线为其他电池包的辅助电源供电(以导通其他电池包的辅助电源和储能电池的电连接)，避免了电池簇内所有电池包都需要安装黑启动控件导致的启动体验差、成本高、可靠性低的问题。此外，通过UPS进行黑启动时需要的UPS功率很小(UPS只需对导通辅助电源与储能电池的电连接的过程进行供电)，在配备UPS的情况下降低了UPS的容量，实现黑启动成本的显著降低。
结合第二方面，在第一种可能的实施方式中，上述黑启动装置中还包括隔离供电电路，上述辅助电源通过上述隔离供电电路并联至上述黑启动母线。上述隔离供电电路包括第一隔离光耦，上述第一隔离光耦的输入端与上述黑启动母线耦合，上述储能电池通过上述第一隔离光耦的输出端与上述辅助电源的启动端口连接，上述第一隔离光耦用于将上述第一隔离光耦的输入端的电能传送到上述第一隔离光耦的输出端，以导通上述储能电池与上述辅助电源的启动端口的电连接。这里，第一隔离光耦中的发光二极管把输入的电能转换为光信号传给光敏管并转换为电能输出，使得黑启动母线与电池包之间在电气隔离的情况下能够进行电能传输，防止因黑启动母线与电池包之间有电连接而引起的干扰。
附图说明
图1是本申请提供的储能系统的应用场景示意图；
图2是本申请提供的储能系统的一结构示意图；
图3是本申请提供的电池包的一结构示意图；
图4是本申请提供的电池包的另一结构示意图；
图5是本申请提供的储能系统的另一结构示意图。
具体实施方式
参见图1，图1是本申请提供的储能系统的应用场景示意图。在本申请提供的储能系统中可包括电池簇和黑启动母线，电池簇可以包括多个串联的电池包(例如串联的电池包1、电池包2、……、电池包n等)，上述多个串联的电池包接入电池簇母线，且上述电池簇通过簇级直流DC/DC变换器与直流DC/交流AC变换器的直流端耦合，DC/AC变换器的交流端与交流电网耦合。上述簇级DC/DC变换器可以对储能系统中电池簇输出的直流电(可以是各电池包输出的直流电)进行电压变换(可以是升压、降压等)，直流DC/交流AC变换器可以对簇级DC/DC变换器输出的直流电进行逆变转换，并将逆变转换后得到的交流电输出至交流电网以对交流电网中的蓄电池、通信基站或者家用设备等用电设备供电。
在一些可行的实施方式中，上述图1中的电池簇可以直接与DC/AC变换器的直流端耦合，DC/AC变换器的交流端与交流电网耦合。DC/AC变换器可以对储能系统中电池簇输出的直流电进行逆变转换，并将逆变转换后得到的交流电输出至交流电网以对交流电网中的蓄电池、通信基站或者家用设备等用电设备供电。
在一些可行的实施方式中，上述储能系统因故障断开与电网的连接时，该储能系统处于离网模式，可以采用黑启动的方式恢复储能系统与电网的用电设备的连接，并通过储能系统中的电池簇为交流电网供电。目前的黑启动是通过在储能系统因故障断开与电网的连接时，通过不间断电源(Uninterrupted Power Supply，UPS)供电，以支持储能系统重新接入交流电网的控制过程，或者利用储能系统中电池簇本身的电量实现黑启动。然而，对于大容量、大功率的储能系统(比如电池簇中包含几百、几千个电池包)，采用UPS供电的黑启动方案需要UPS设备提供较大的供电功率。比如，UPS给电池包内每个单板供电以将各电池包接入交流电网，当每个单板需要供电的时候(包含电池包内风扇)，给一个储能系统黑启动过程供电的功率就会非常大，UPS功率要求高，导致黑启动成本较高。在利用储能系统中电池簇本身的电量实现黑启动的方式中，当储能系统中的电池包不是持续接入母线的情况下，储能系统中的簇级电池母线在启动之前可能无法供电。比如，电池包中有配备电池优化器，电池优化器的作用是当电池包中储能电池电压不均衡的时候通过控制电池包中的开关管，以控制储能电池的切入、切出实现电池包的均衡，各开关管需要供电以实现开关管的导通、关断，而电池包内的开关管默认是关断的，所以储能系统中的簇级电池母线在启 动之前无法供电，则在配备电池优化器的情况下不能利用电池簇本身的电量实现黑启动，适用性低。
本申请提供的储能系统中，储能系统中的电池包包括储能电池和开关管，电池包中还包括控制器以及与储能电池并联的辅助电源。上述辅助电源与黑启动母线耦合，多个电池包中包括携带黑启动控件的目标电池包(为方便描述，可以称作目标电池包)，目标电池包通过其携带的黑启动控件导通目标电池包中的目标储能电池与目标辅助电源的电连接，使得目标辅助电源基于所述目标储能电池提供的电能为黑启动母线供电，以触发所述黑启动母线向所述多个电池包中除所述目标电池包的其他电池包的辅助电源供电。所述其他电池包中各电池包的辅助电源可以基于所述黑启动母线提供的电能导通与储能电池的电连接，并基于储能电池提供的电能为控制器供电。控制器可以控制各电池包中的开关管导通或者关断，以将各电池包中的储能电池串联接入电池簇母线，簇级DC/DC变换器与DC/AC变换器可以基于电池簇中电池包提供的直流电进行启动以为交流电网供电，储能系统利用黑启动母线的供电实现黑启动，解决了在电池包内置电池优化器的情况下电池簇母线没电而不能从簇级启动的问题，适用性强，同时避免了电池簇内所有电池包都需要安装黑启动控件导致的启动体验差、成本高、可靠性低的问题。此外，在配备UPS的情况下，通过UPS进行黑启动时需要的UPS功率很小(UPS只需对导通辅助电源与储能电池的电连接的过程进行供电)，降低了UPS的功率要求，实现黑启动成本的显著降低。
参见图2，图2是本申请提供的储能系统的一结构示意图。在图2所示的储能系统中包括电池簇和黑启动母线，电池簇可以包括多个串联的电池包(例如串联的电池包1、电池包2、……、电池包n等)，上述多个串联的电池包接入电池簇母线，且上述电池簇通过簇级直流DC/DC变换器与直流DC/交流AC变换器的直流端耦合，DC/AC变换器的交流端与交流电网耦合。上述簇级DC/DC变换器可以对储能系统中电池簇输出的直流电(可以是各电池包输出的直流电)进行电压变换(可以是升压、降压等)，直流DC/交流AC变换器可以对簇级DC/DC变换器输出的直流电进行逆变转换，并将逆变转换后得到的交流电输出至交流电网以对交流电网供电。
在一些可行的实施方式中，上述图2中的电池簇可以直接与DC/AC变换器的直流端耦合，DC/AC变换器的交流端与交流电网耦合。DC/AC变换器可以对储能系统中电池簇输出的直流电进行逆变转换，并将逆变转换后得到的交流电输出至交流电网以对交流电网中的蓄电池、通信基站或者家用设备等用电设备供电。
在一些可行的实施方式中，在图2所示的储能系统中，上述电池簇中各电池包可以包括储能电池、与储能电池串联的第一开关管和与储能电池并联的第二开关管。以电池包1为例，电池包1中可以包括储能电池、第一开关管(为方便描述，可以表示为开关管S1)以及第二开关管(为方便描述，可以表示为开关管S2)，开关管S1与储能电池串联，开关管S2与储能电池并联，这里，当开关管S1导通、开关管S2关断时储能电池串联接入电池簇母线以接入交流电网(可以接入电池簇母线后通过簇级DC/DC变换器与DC/AC变换器与交流电网耦合)，当开关管S1关断、开关管S2导通时储能电池切出电池簇母线。电池包1中还可以包括控制器(图2未示出)、与上述储能电池并联的辅助电源以及隔离供电电路，上述辅助电源通过隔离供电电路与黑启动母线耦合，黑启动母线可以向电池包1供电，黑启动母线提供的电能通过上述隔离供电电路以电气隔离的形式传送至电池包1中的辅助电源，辅助电源可以基于黑启动母线提供的电能导通与储能电池的电连接，从而基于储能电池提供的电能为电池包1中的控制器供电。控制器可以控制开关管S1导通，以将电池包1中的储能电池串联接入电池簇母线。可以理解的，其他电池包的组成以及接入电池簇母线的过程可以参照上述对电池包1的描述，此处不再赘述，簇级DC/DC变换器与DC/AC变换器可以基于电池簇中电池包提供的直流电(电池包中储能电池提供的直流电)进行启动以为交流电网供电。这里，储能系统利用黑启动母线的供电实现黑启动，解决了在电池包内置电池优化器(可以包括第一开关管和第二开关管)的情况下电池簇母线没电而不能从簇级启动的问题，适用性强。此外，若通过UPS对上述导通辅助电源与储能电池的电连接的过程进行供电，通过UPS进行黑启动时需要的UPS功率很小，在配备UPS的情况下降低了UPS的容量，实现黑启动成本的显著降低。
下面将结合图2至图5对本申请实施例提供的储能系统进行示例说明。在一些可行的实施方式中，上述黑启动母线提供的电能可以来自电池簇中的电池包。以电池簇中的目标电池包(可以是多个串联的电池包中的一个或者多个，本申请以目标电池包为多个串联的电池包中的一个为例进行说明，后文不再赘述)向黑启动母线供电，触发黑启动母线向除目标电池包的其他电池包的辅助电源供电为例进行说明，请一并参见图3，图3是本申请提供的电池包的一结构示意图，如图3所示，图3中的电池包可以是上述电池簇中串联的多个电池包中的目标电池包，该电池包可以包括第一隔离光耦，第一隔离光耦的输入端与黑启动母线耦合，储能电池通过第一隔离光耦的输出端与辅助电源的启动端口连接。当黑启动母线向电池包中的辅助电源供电时，上述第一隔离光耦可以将该隔离光耦的输入端的电能传送到输出端，以将电能以电气隔 离的形式传送给辅助电源，从而辅助电源基于黑启动母线提供的电能导通与储能电池的电连接。可选的，图3中的电池包中还包括可控开关，辅助电源可以基于储能电池提供的电能为控制器供电，控制器可以控制上述可控开关导通，从而导通储能电池与辅助电源的电连接，使得上述辅助电源在黑启动母线不再提供电能时依然可以保持与储能电池的电连接。第一隔离光耦中的发光二极管把输入的电能转换为光信号传给光敏管并转换为电能输出，使得黑启动母线与电池包之间在没有直接的电气连接的情况下进行电能传输，防止因黑启动母线与电池包之间有电连接而引起的干扰，供电效果好。
在一些可行的实施方式中，上述图3中的目标电池包包括与储能电池串联的开关管S1以及与储能电池并联的开关管S2，上述开关管S1以及开关管S2默认情况下为关断，且可以由控制器控制导通或者关断，上述控制器需要外部供电以实现对各开关管的控制。进一步地，上述图3中的目标电池包还可以包括黑启动控件和隔离绕组，上述黑启动控件可以是按钮，目标电池包中的第一隔离光耦的输出端与上述黑启动控件并联连接在目标电池包中的储能电池(为方便描述，可以是目标储能电池)与辅助电源(为方便描述，可以是目标辅助电源)的启动端口之间，目标辅助电源的供电端口通过上述隔离绕组与黑启动母线连接。上述黑启动控件可以在被触发时(比如，按钮按下并持续一段时间)导通上述目标储能电池与目标辅助电源的电连接，目标辅助电源可以基于上述目标储能电池提供的电能为目标电池包中的目标控制器供电，并通过上述隔离绕组向上述黑启动母线隔离供电，从而触发黑启动母线向多个电池包中除目标电池包的其他电池包的辅助电源供电，使得各电池包的辅助电源基于黑启动母线提供的电能导通与各电池包的各储能电池的电连接(可以是其他电池包中的第一隔离光耦将输入端的电能传送到输出端，以将电能以电气隔离的形式传送给辅助电源)。举例来说，请再次参见图2，图2中的电池包1可以是目标电池包，即电池包1中包括黑启动控件(可以是按钮)和隔离绕组，当电池包1中的按钮按下并持续一段时间后，可以导通该电池包中的辅助电源和储能电池的电连接，电池包1中的辅助电源可以基于储能电池提供的电能通过上述隔离绕组向黑启动母线隔离供电。这里，由于其实质上是给导通辅助电源与储能电池的电连接的过程供电，而不是给辅助电源供电，因此黑启动母线需要的供电功率很小，一般是毫瓦级。电池簇中的电池包2至电池包n不配置黑启动控件，通过黑启动母线就可以向电池包2至电池包n传送电能，使得上述电池包2至电池包n中的辅助电源基于黑启动母线提供的电能导通与储能电池的电连接(可以是其他电池包中的第一隔离光耦将输入端的电能传送到输出端，以将电能以电气隔离的形式传送给辅助电源)。各电池包中的辅助电源可以基于储能电池提供的电能为控制器供电，控制器可以控制各电池包中的第一开关管(例如图2或者图3电池包中的开关管S1)导通以将储能电池串联接入电池簇母线。储能系统通过触发单个目标电池包中的黑启动控件，使得目标电池包从该电池包中的储能电池取电并向黑启动母线供电，通过黑启动母线为其他电池包的辅助电源供电(以导通其他电池包的辅助电源和储能电池的电连接)，避免了电池簇内所有电池包都需要安装黑启动控件导致的启动体验差、成本高、可靠性低的问题。此外，储能系统利用辅助电源从储能电池取电实现黑启动，解决了在电池包内置电池优化器(可以包括第一开关管和第二开关管)的情况下电池簇母线没电而不能基于簇级母线供电实现黑启动的问题，适用性强。
在一些可行的实施方式中，电池包还可以包括电压调整单元和第二隔离光耦，请再次参见图3，图3所示的电池包中包括第一隔离光耦和第二隔离光耦，电池包中隔离绕组的副边绕组可以通过电压调整单元连接黑启动母线，第二隔离光耦的输入端连接控制器，第二隔离光耦的输出端连接上述电压调整单元。上述控制器可以通过上述第二隔离光耦向上述电压调整单元发送控制指令，以控制上述电压调整单元对上述隔离绕组的副边绕组电压进行电压变换以向上述黑启动母线输出目标电压(可以是低于60V的安全电压，比如48V，36V，24V，15V，12V等)，这里，上述隔离绕组的副边绕组电压可以是隔离绕组对上述辅助电源的供电端口的输出电压(可以是基于储能电池的供电得到的输出电压)经过电压变换得到的直流电压。在黑启动结束时，上述控制器还可以通过上述第二隔离光耦向上述电压调整单元发送控制指令以停止对黑启动母线供电，防止在不需要黑启动的情况下持续供电而耗费储能电池的电池电量。上述第二隔离光耦中的发光二极管把输入的电能转换为光信号传给光敏管并转换为电能输出，使得黑启动母线与电池包之间在没有直接的电气连接的情况下进行电能传输，防止因黑启动母线与电池包之间有电连接而引起的干扰，电能传输效果好。
在一些可行的实施方式中，电池包中隔离绕组的原边绕组可以通过电压调整单元连接辅助电源，请一并参见图4，图4是本申请提供的电池包的另一结构示意图，如图4所示，电池包中隔离绕组的原边绕组可以通过电压调整单元连接辅助电源，电池包中控制器直接与电压调整单元连接，控制器可以向上述电压调整单元发送控制指令，以控制上述电压调整单元对辅助电源的供电端口的输出电压进行电压变换，使得隔离绕组对上述电压调整单元输出的电压进一步电压变换，隔离绕组的副边绕组向上述黑启动母线输出目 标电压(可以是低于60V的安全电压，比如48V，36V，24V，15V，12V等)。上述隔离绕组的副边绕组可以通过变压电路与黑启动母线连接，该变压电路对隔离绕组的副边绕组输出电压进行电压变换，以向上述黑启动母线输出目标电压。在黑启动结束时，上述控制器还可以向上述电压调整单元发送控制指令以停止对黑启动母线供电，防止在不需要黑启动的情况下持续供电而耗费储能电池的电池电量。
在一些可行的实施方式中，储能系统中还可以包括不间断电源UPS，UPS与黑启动母线耦合，UPS可以为上述黑启动母线供电，使得上述黑启动母线向上述多个串联的电池包中的辅助电源供电以导通辅助电源与储能电池的电连接(可以是电池包中的第一隔离光耦将输入端的电能传送到输出端，以将电能以电气隔离的形式传送给辅助电源)。请一并参见图5，图5是本申请提供的储能系统的另一结构示意图，如图5所示，储能系统中可以包括黑启动母线1和黑启动母线2，黑启动母线1和黑启动母线2分别与电池簇1和电池簇2连接，储能系统中的UPS通过电压变换器与上述黑启动母线1和黑启动母线2耦合。这里，上述电压变换器可以是具备直流电压变换的电压变换器(比如当UPS可以提供直流电压时)，上述电压变换器也可以是具备整流和直流电压变换的直流电压变换器(比如当UPS可以提供交流电压时)，可根据具体器件类型确定，在此不做限制。在黑启动过程中，上述UPS可以为电压变换器供电，通过电压变换器进行电压变换以为上述黑启动母线1和黑启动母线2输出目标电压，使得黑启动母线1向电池簇1中串联的电池包1至电池包m供电，黑启动母线2向电池簇2中串联的电池包1至电池包n供电，各电池包中的第一隔离光耦可以将输入端的电能传送到输出端，以将电能传送给其包含的辅助电源，从而导通辅助电源与储能电池的电连接。可以理解的，UPS对黑启动母线仅需为导通辅助电源与储能电池的电连接的过程供电(相当于为各电池包中的第一隔离光耦的二极管供电)，其供电电流只需要数毫安，因此即使储能系统中有几百个电池包，UPS的功率也仅仅是几十或几百瓦的水平，远远低于UPS直接为各电池包中的单板供电的方案，降低了UPS的功率容量，实现黑启动成本的显著降低。
在一些可行的实施方式中，上述储能系统中还可以包括远程集中控制器和本地启动控制器，在黑启动过程中，上述远程集中控制器可以与UPS通信，并控制UPS向上述电压变换器供电(可以是交流供电或者直流供电)，上述远程集中控制器可以发送黑启动指令至本地启动控制器，使得本地启动控制器与电压变换器通信，控制电压变换器向其耦合的黑启动母线(黑启动母线1和黑启动母线2)输出目标电压使得黑启动母线1向电池簇1中串联的电池包1至电池包m供电，黑启动母线2向电池簇2中串联的电池包1至电池包n供电，各电池包中的第一隔离光耦可以将输入端的电能传送到输出端，以将电能传送给其包含的辅助电源。各电池包中的辅助电源启动后，辅助电源为各电池包中的控制器供电，控制器可以控制各电池包中的第一开关管(例如图2或者图3电池包中的开关管S1)导通以将储能电池串联接入电池簇母线。这里，通过UPS对黑启动母线供电的黑启动方式免去了触发黑启动控件的过程(比如按下按钮)，且UPS仅需为导通辅助电源与储能电池的电连接的过程供电(相当于为各电池包中的第一隔离光耦的二极管供电)，其供电电流只需要数毫安，因此即使储能系统中有几百个电池包，UPS的功率也仅仅是几十或几百瓦的水平，远远低于UPS直接为各电池包中的单板供电的方案，降低了UPS的功率容量，实现黑启动成本的显著降低。
在本申请中，多个电池包中的目标电池包通过其携带的黑启动控件导通目标电池包中的目标储能电池与目标辅助电源的电连接，使得目标辅助电源基于所述目标储能电池提供的电能为所述目标电池包中的目标控制器和所述黑启动母线供电，以触发所述黑启动母线向所述多个电池包中除所述目标电池包的其他电池包的辅助电源供电。所述其他电池包中各电池包的辅助电源用于基于所述黑启动母线提供的电能导通与所述各电池包的各储能电池的电连接，并基于所述各储能电池提供的电能为所述各电池包的控制器供电。储能系统通过触发单个目标电池包中的黑启动控件，使得目标电池包从该电池包中的储能电池取电并向黑启动母线供电，通过黑启动母线为其他电池包的辅助电源供电(以导通其他电池包的辅助电源和储能电池的电连接)，避免了电池簇内所有电池包都需要安装黑启动控件导致的启动体验差、成本高、可靠性低的问题。此外，储能系统还可以通过UPS为上述黑启动母线供电，使得上述黑启动母线向上述多个串联的电池包中的辅助电源供电，使得各电池包的辅助电源基于黑启动母线提供的电能导通与各电池包的各储能电池的电连接(可以是电池包中的第一隔离光耦将输入端的电能传送到输出端，以将电能以电气隔离的形式传送给辅助电源)。UPS对黑启动母线仅需为导通辅助电源与储能电池的电连接的过程供电(相当于为各电池包中的第一隔离光耦的二极管供电)，其供电电流只需要数毫安，因此即使储能系统中有几百个电池包，UPS的功率也仅仅是几十或几百瓦的水平，远远低于UPS直接为各电池包中的单板供电的方案，降低了UPS的功率容量，实现黑启动成本的显著降低。

Claims (10)

  1. 一种储能系统，其特征在于，所述储能系统中包括电池簇和黑启动母线，所述电池簇与交流电网耦合，所述电池簇中包括串联的多个电池包，所述电池包中包括储能电池、控制器以及与所述储能电池并联的辅助电源，所述辅助电源与所述黑启动母线耦合；
    所述多个电池包中包括关联黑启动控件的目标电池包，所述黑启动控件设置在所述目标电池包中的目标储能电池和目标辅助电源之间，所述黑启动控件用于在被触发时导通所述目标储能电池与所述目标辅助电源的电连接，所述目标辅助电源用于基于所述目标储能电池提供的电能为所述目标电池包中的目标控制器和所述黑启动母线供电，以触发所述黑启动母线向所述多个电池包中除所述目标电池包的其他电池包的辅助电源供电；
    所述其他电池包中各电池包的辅助电源用于基于所述黑启动母线提供的电能导通与所述各电池包的各储能电池的电连接，并基于所述各储能电池提供的电能为所述各电池包的控制器供电。
  2. 根据权利要求1所述的储能系统，其特征在于，所述电池包中还包括隔离供电电路，所述辅助电源通过所述隔离供电电路并联至所述黑启动母线；
    所述隔离供电电路用于将来自所述黑启动母线的电能以电气隔离的方式传送至所述辅助电源。
  3. 根据权利要求2所述的储能系统，其特征在于，所述隔离供电电路包括第一隔离光耦，所述第一隔离光耦的输入端与所述黑启动母线耦合，所述储能电池通过所述第一隔离光耦的输出端与所述辅助电源的启动端口连接；
    所述第一隔离光耦用于将所述第一隔离光耦的输入端的电能传送到所述第一隔离光耦的输出端，以导通所述储能电池与所述辅助电源的启动端口的电连接。
  4. 根据权利要求3所述的储能系统，其特征在于，所述目标电池包中的第一隔离光耦的输出端与所述黑启动控件并联连接在所述目标电池包中的目标储能电池与目标辅助电源的启动端口之间，所述目标电池包中的目标隔离供电电路还包括隔离绕组，所述目标辅助电源的供电端口通过所述隔离绕组与所述黑启动母线连接；
    所述目标辅助电源用于从所述目标储能电池取电，并通过所述隔离绕组向所述黑启动母线供电。
  5. 根据权利要求4所述的储能系统，其特征在于，所述目标隔离供电电路还包括电压调整单元，所述隔离绕组的原边绕组通过所述电压调整单元连接所述目标辅助电源；
    所述目标电池包中的目标控制器用于控制所述电压调整单元对所述目标辅助电源的输出电压进行电压变换，以通过所述隔离绕组向所述黑启动母线输出目标电压。
  6. 根据权利要求4所述的储能系统，其特征在于，所述目标隔离供电电路还包括电压调整单元和第二隔离光耦，所述隔离绕组的副边绕组通过所述电压调整单元连接所述黑启动母线；所述第二隔离光耦的输入端连接所述目标电池包中的目标控制器，所述第二隔离光耦的输出端连接所述电压调整单元；
    所述目标电池包中的目标控制器用于通过所述第二隔离光耦向所述电压调整单元发送控制指令，所述控制指令用于控制所述电压调整单元对所述隔离绕组的副边绕组电压进行电压变换，以通过所述隔离绕组向所述黑启动母线输出目标电压。
  7. 根据权利要求1-6任一项所述的储能系统，其特征在于，所述储能系统中还包括不间断电源UPS，所述UPS与所述黑启动母线耦合，所述UPS用于为所述黑启动母线供电，触发所述黑启动母线向所述多个电池包中的辅助电源供电。
  8. 根据权利要求1-7任一项所述的储能系统，其特征在于，所述多个电池包中各电池包还包括第一开关管和第二开关管，所述第一开关管与所述各电池包的储能电池串联，所述第二开关管与所述各电池包的储能电池并联，所述各电池包的控制器用于控制所述各电池包的第一开关管导通以及第二开关管关断，以将所述各电池包中的储能电池串联接入电池簇母线。
  9. 一种黑启动装置，其特征在于，所述黑启动装置用于储能系统，所述储能系统中包括电池簇和黑启动母线，所述电池簇中包括串联的多个电池包，所述电池包中包括储能电池、控制器以及与所述储能电池并联的辅助电源，所述辅助电源与所述黑启动母线耦合；
    所述黑启动装置包括黑启动控件，所述黑启动控件用于在被触发时导通所述多个电池包中的目标电池包的目标储能电池与目标辅助电源的电连接，所述目标辅助电源用于基于所述目标储能电池提供的电能为所述目标电池包中的目标控制器和所述黑启动母线供电，以触发所述黑启动母线向所述多个电池包中除所述目标电池包的其他电池包的辅助电源供电；
    所述黑启动装置用于通过所述其他电池包中各电池包的辅助电源用于基于所述黑启动母线提供的电能导通与所述各电池包的各储能电池的电连接，并基于所述各储能电池提供的电能为所述各电池包的控制器供电。
  10. 根据权利要求9所述的黑启动装置，其特征在于，所述黑启动装置中还包括隔离供电电路，所述辅助电源通过所述隔离供电电路并联至所述黑启动母线；
    所述隔离供电电路包括第一隔离光耦，所述第一隔离光耦的输入端与所述黑启动母线耦合，所述储能电池通过所述第一隔离光耦的输出端与所述辅助电源的启动端口连接，所述第一隔离光耦用于将所述第一隔离光耦的输入端的电能传送到所述第一隔离光耦的输出端，以导通所述储能电池与所述辅助电源的启动端口的电连接。
PCT/CN2023/125157 2022-11-23 2023-10-18 储能系统和黑启动装置 Ceased WO2024109401A1 (zh)

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