WO2024007455A1 - 储能系统及其控制方法、装置、电子设备及存储介质 - Google Patents

储能系统及其控制方法、装置、电子设备及存储介质 Download PDF

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Publication number
WO2024007455A1
WO2024007455A1 PCT/CN2022/120876 CN2022120876W WO2024007455A1 WO 2024007455 A1 WO2024007455 A1 WO 2024007455A1 CN 2022120876 W CN2022120876 W CN 2022120876W WO 2024007455 A1 WO2024007455 A1 WO 2024007455A1
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Prior art keywords
controllers
energy storage
controller
switch module
target
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Ceased
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PCT/CN2022/120876
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English (en)
French (fr)
Inventor
司修利
刘雄江
朱嵩华
孙丽艳
江思伟
张海燕
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Alpha Ess Co Ltd
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Alpha Ess Co Ltd
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Priority to US18/723,079 priority Critical patent/US20250158429A1/en
Priority to AU2022468688A priority patent/AU2022468688B2/en
Priority to EP22950016.0A priority patent/EP4447406A4/en
Publication of WO2024007455A1 publication Critical patent/WO2024007455A1/zh
Priority to ZA2024/05069A priority patent/ZA202405069B/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/50—Queue scheduling
    • 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
    • H02J7/40—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the exchange of charge or discharge related data
    • 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
    • H02J7/60—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements
    • H02J7/663—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements using battery or load disconnect circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • 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
    • 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
    • H02J7/50—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially
    • H02J7/52—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially for charge balancing, e.g. equalisation of charge between batteries
    • H02J7/54—Passive balancing, e.g. using resistors or parallel MOSFETs
    • 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
    • H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
    • H02J7/82—Control of state of charge [SOC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/50—Queue scheduling
    • H04L47/62—Queue scheduling characterised by scheduling criteria
    • H04L47/622—Queue service order
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/50—Queue scheduling
    • H04L47/62—Queue scheduling characterised by scheduling criteria
    • H04L47/622—Queue service order
    • H04L47/623—Weighted service order
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/90—Buffering arrangements
    • H04L49/9084—Reactions to storage capacity overflow
    • H04L49/9089—Reactions to storage capacity overflow replacing packets in a storage arrangement, e.g. pushout
    • H04L49/9094—Arrangements for simultaneous transmit and receive, e.g. simultaneous reading/writing from/to the storage element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller

Definitions

  • the present invention relates to the field of energy storage technology, and in particular, to an energy storage system and its control method, device, electronic equipment and storage medium.
  • energy storage systems usually consist of multiple battery devices connected in series.
  • more battery devices are usually installed, that is, there will be some redundancy in the number of batteries.
  • a single battery appears, Due to overvoltage, undervoltage, overtemperature, etc., a single battery device cannot operate normally, and the entire series circuit cannot work. Therefore, these battery devices need to be bypassed, and the remaining battery devices must be connected to the series circuit. ;
  • the object of the present invention is to provide an energy storage system and its control method, device, electronic equipment and storage medium.
  • one embodiment of the present invention provides an energy storage system, including: M battery devices connected in series and a communication network.
  • the battery device includes a positive electrode and a negative electrode.
  • the battery device It includes an energy storage battery, a controller, a first switch module and a second switch module.
  • M controllers can communicate with each other based on the communication network, where M is a natural number, M ⁇ 2; the positive electrode of the energy storage battery Connected to the first end of the first switch module, the positive electrode and the first end of the second switch module are both electrically connected to the second end of the first switch module, and the second end of the second switch module is electrically connected to the negative electrode of the energy storage battery. Connection; the controller can control the connection and disconnection between the first and second terminals in the first switch module, and control the connection and disconnection between the first and second terminals in the second switch module.
  • both the first and second switch modules are switching transistors.
  • the first terminal is one of the collector and the emitter, and the second terminal is the collector.
  • the other one of the electrode and the emitter; the controller is electrically connected to the base of the first switch module and is also electrically connected to the base of the second switch module.
  • An embodiment of the present invention also provides a controller control method, which includes the following steps: performing time synchronization with the remaining M-1 controllers based on the communication network; obtaining the first value of the energy storage battery corresponding to the controller; status information, and sends the first status information to the remaining M-1 controllers based on the communication network, and receives the second status information sent by the remaining M-1 controllers; based on the first preset algorithm, the first status information and M-1 second status information, select the first main controller from the M controllers, sort the M controllers to obtain the sorting queue; from the end of the queue to the head of the queue, from the sorting Select N target controllers from the sequence and generate operation instructions corresponding to the N target controllers.
  • the operation instructions corresponding to the N target controllers are all the same, where the operation instructions are used to represent the bypass operation of the energy storage battery.
  • access operation N is a natural number, N ⁇ M; when the controller is the first main controller, the operation time is generated, and the corresponding operation instructions and the operation time are sent to all N target controllers, where , the operation time is later than the current time; when the operation instruction and the operation time are received, the following operations are performed at the received operation time: when the received operation instruction represents the bypass operation, the first switch module is controlled to be in a disconnected state , controlling the second switch module to be in a connected state; when the received operation instruction represents an access operation, controlling the first switch module to be in a connected state, and controlling the second switch module to be in a disconnected state.
  • the "sending corresponding operation instructions and the operation time to all N target controllers" specifically includes: sending corresponding operation instructions and the operation time to all M controllers. , where, when the operation instructions corresponding to the N target controllers are bypass operations, the operation instructions corresponding to the remaining M-N controllers are access operations; when the operation instructions corresponding to the N target controllers are access operations, The operation instructions corresponding to the remaining M-N controllers are bypass operations.
  • both the first and second status information include the SOC value of the energy storage battery; the "based on the first preset algorithm, the first status information and M-1 second status information, "Select the first master controller from the M controllers, sort the M controllers to obtain the sorting queue" specifically includes: based on the first preset algorithm and M SOC values, select the first master controller from the M controllers. controller; when the corresponding energy storage battery is in the charging state, the M controllers are sorted in order from small to large SOC values to obtain a sorting queue; when the corresponding energy storage battery is in the discharging state, the M controllers are sorted in order from large to large SOC values.
  • Sort M controllers in a small order to obtain a sorting queue specifically includes: generating corresponding operation instructions for N target controllers bypass operation instructions.
  • both the first and second status information include the health value of the energy storage battery.
  • the better the health status of the energy storage battery, the higher the corresponding health value; the "based on the first A preset algorithm, first state information and M-1 second state information, select the first main controller from the M controllers, sort the M controllers to obtain the sorting queue" specifically includes: based on the first preset Assume the algorithm, M health values, select the first main controller from the M controllers; sort the M controllers in order from large to small health values to obtain a sorting queue; the "generate N target controls"
  • the operation instructions corresponding to the controller, the operation instructions corresponding to the N target controllers are all the same.” Specifically, it includes: generating the bypass operation instructions corresponding to the N target controllers.
  • the "time synchronization with the remaining M-1 controllers based on the communication network” specifically includes: using the second preset algorithm to synchronize time from the remaining M-1 controllers Select the second main controller; the controller sends a first message to the second main controller through the communication network, and the first message contains the first timestamp T1 when the first message leaves the controller ; Receive the second message sent back by the second main controller.
  • the second message includes the second timestamp T2 when the first message arrives at the second main controller, and when the second message leaves the second main controller.
  • the configuration voltage of the energy storage system is V; when the operation instructions corresponding to the N target controllers are bypass operations, the voltages of the energy storage batteries corresponding to the remaining M-N controllers The sum is Sum1,
  • An embodiment of the present invention also provides a control device for a controller, including the following modules: a time synchronization module for time synchronization with the remaining M-1 controllers based on the communication network; a selection module for obtaining The first status information of the energy storage battery corresponding to this controller is sent to the remaining M-1 controllers based on the communication network, and the second status information is received from the remaining M-1 controllers.
  • Information based on the first preset algorithm, first state information and M-1 second state information, select the first master controller from M controllers, sort the M controllers to obtain the sorting queue; slave queue With the tail toward the head of the queue, N target controllers are selected from the sorting sequence, and operation instructions corresponding to the N target controllers are generated.
  • the operation instructions corresponding to the N target controllers are all the same, where the operation instructions Used to represent the bypass operation or access operation of the energy storage battery, N is a natural number, N ⁇ M; the instruction sending module is used to generate the operation time when the controller is the first main controller, and send it to N Each target controller sends corresponding operation instructions and the operation time, wherein the operation time is later than the current time; the instruction execution module is used to execute the following at the received operation time when receiving the operation instruction and operation time.
  • An embodiment of the present invention also provides an electronic device, including: a memory for storing executable instructions; and a processor for implementing the above control method when executing the executable instructions stored in the memory.
  • Embodiments of the present invention also provide a storage medium that stores executable instructions for causing the processor to implement the above control method when executed.
  • the energy storage system includes: a plurality of battery devices connected in series and Communication network.
  • the battery device includes a positive electrode and a negative electrode.
  • the battery device includes an energy storage battery, a controller, a first switch module and a second switch module.
  • controllers can communicate with each other based on the communication network; the positive electrode of the energy storage battery Electrically connected to the first end of the first switch module, the positive electrode and the first end of the second switch module are both electrically connected to the second end of the first switch module, and the second end of the second switch module is connected to the negative electrode of the energy storage battery Electrical connection; the controller can control the connection and disconnection between the first and second terminals in the first switch module, and control the connection and disconnection between the first and second terminals in the second switch module.
  • the plurality of battery devices can be disconnected and connected simultaneously.
  • Figure 1 is a schematic structural diagram of an energy storage system in an embodiment of the present invention
  • Figure 2 is a schematic flowchart of a control method in an embodiment of the present invention.
  • Embodiment 1 provides an energy storage system, as shown in Figure 1, including:
  • the battery device 1 includes a positive electrode 1A and a negative electrode 1B.
  • the battery device 1 includes an energy storage battery 11, a controller 12, a first switch module S1 and In the second switch module S2, M controllers 12 can communicate with each other based on the communication network 2, where M is a natural number, M ⁇ 2; here, the energy storage battery 11 may contain multiple cells, and these cells
  • the energy storage battery 11 is formed by connecting in series or parallel.
  • the energy storage battery 11 can be a nickel metal hydride battery, a nickel cadmium battery, a lithium battery, etc.
  • the controller 12 can be a single chip microcomputer, etc.
  • the communication network 2 can be an Ethernet or an optical fiber network.
  • CAN Controller Area Network, Controller Area Network
  • each battery device 1 includes a controller 12, that is, each battery device 1 can independently control the energy storage battery 11 therein, that is, the energy storage system is a distributed control system that can It is understood that in the energy storage system, when a certain battery device 1 is damaged, the battery device 1 only needs to be bypassed, and the energy storage system can still work normally.
  • each controller 12 has a unique identifier (this identifier can also be considered as the identification of the battery device 1 symbol).
  • a communication module is provided in each controller 12 .
  • the positive electrode of the energy storage battery 11 is electrically connected to the first end of the first switch module S1.
  • the positive electrode 1A and the first end of the second switch module S2 are both electrically connected to the second end of the first switch module S1.
  • the second end of the switch module S2 is electrically connected to the negative electrode of the energy storage battery 11;
  • the controller 12 can control the connection and disconnection between the first and second terminals in the first switch module S1, and control the connection and disconnection between the first and second terminals in the second switch module S2. .
  • the battery device 1 in a battery device 1, when the first switch module S1 is in the connected state and the second switch module S2 is in the disconnected state, the battery device 1 is connected to the energy storage system; when When the first switch module S1 is in the disconnected state and the second switch module S2 is in the connected state, the battery device 1 is in the bypass state, that is, it is not connected to the energy storage system.
  • M battery devices 1 connected in series are connected in series with each other. That is, for two adjacent battery devices 1 , the positive electrode 1A of one battery device 1 is connected to the positive electrode 1A of the other battery device 1 .
  • the negative electrode 1B of the device 1 is electrically connected.
  • the battery system is also provided with a positive output port 3A and a negative output port 3B.
  • the first and second switch modules are switching transistors.
  • the first terminal is one of the collector and the emitter
  • the second terminal is one of the collector and the emitter.
  • the controller 12 is electrically connected to the base of the first switch module S1 and is also electrically connected to the base of the second switch module S2.
  • the controller 2 can control the connection and disconnection between the collector and emitter of the first and second switch modules by controlling the voltages of the bases of the first and second switch modules.
  • Embodiment 2 of the present invention provides a control method for the controller 12 in Embodiment 1.
  • the controller 12 can execute the control method every preset time. For example, every 60S, etc.; in addition, the controller 12 will monitor the status value (for example, voltage, temperature, SOC, highest cell voltage, lowest cell voltage and current, etc.) of its corresponding energy storage battery 11 in real time, When the status value is not within the preset range, execution commands can be sent to all controllers 12, so each controller 12 will execute the control method; in the energy storage system, there are M controllers 12, each Each controller 12 can execute this control method; as shown in Figure 2, it includes the following steps:
  • Step 201 Based on the communication network 2, perform time synchronization with the remaining M-1 controllers 12; in this energy storage system, the M controllers 12 have their own independent system clocks. In order to eliminate the The time error between them requires time synchronization of the M controllers 12.
  • Step 202 Obtain the first status information of the energy storage battery 11 corresponding to this controller, send the first status information to the remaining M-1 controllers 12 based on the communication network 2, and receive the remaining M-1 controls.
  • the second status information sent by the controller 12 based on the first preset algorithm, the first status information and M-1 second status information, select the first main controller from the M controllers 12, and control the M controllers 12.
  • the controller 12 performs sorting to obtain a sorting queue; from the end of the queue toward the head of the queue, select N target controllers from the sorting sequence, generate operation instructions corresponding to the N target controllers, and generate operations corresponding to the N target controllers.
  • the instructions are all the same, where the operation instructions are used to represent the bypass operation or access operation of the energy storage battery 11, N is a natural number, N ⁇ M;
  • the controller is the "this controller".
  • the first and second status information may include: the voltage of the energy storage battery 11, the voltage of the energy storage battery 11 current and the temperature of the energy storage battery 11, etc.
  • sort the M controllers 12 to obtain the sorting queue can be understood as: based on the first preset algorithm, sort each control
  • the status information of the controller 12 is processed to obtain M scores corresponding to the M controllers 12 one-to-one, and then the scores are sorted in order from small to large, or from large to small to obtain a sorting queue, and then N are selected Perform operations.
  • each energy storage battery 11 can be scored according to the quality of the energy storage battery 11 (the better the quality, the higher the score), and the M energy storage batteries 11 are ranked from the highest score. Arrange them in order of lowest score, then select N for bypass operation, and the remaining M-N for access operation; in addition, during charging, based on the first and second status information, the remaining energy storage battery 11 can be The power is used to score each energy storage battery 11 (the more remaining power, the higher the score), the M energy storage batteries 11 are arranged in order from high score to low score, and then N are selected for access.
  • each energy storage battery 11 can be scored according to the remaining power of the energy storage battery 11 (the more remaining power, the higher the score. The higher the value), the M energy storage batteries 11 are arranged in order from low score to high score, and then N are selected for access operation, and the remaining M-N are for bypass operation.
  • Step 203 When the current controller is the first main controller, generate an operation time, and send corresponding operation instructions and the operation time to all N target controllers, where the operation time is later than the current time; here, The operation time of each controller is the same. It can be understood that when this controller is the first main controller, corresponding operation instructions and the operation time are also sent to this controller.
  • a check code can be added to the data packet, for example, CRC (Cyclic Redundancy Check, cyclic redundancy check) code, etc.
  • Step 204 When receiving the operation instruction and operation time, perform the following operations at the received operation time: when the received operation instruction represents the bypass operation, control the first switch module S1 to be in the off state, control the second The switch module S2 is in the connected state; when the received operation instruction represents the access operation, the first switch module S1 is controlled to be in the connected state, and the second switch module S2 is controlled to be in the disconnected state.
  • the received operation instruction represents the bypass operation
  • the first switch module S1 when the access operation, the first switch module S1 is controlled to be in the connected state, and the second switch module S2 is controlled to be in the disconnected state.
  • each controller can execute the operation instruction at the same time, thereby enabling the bypass operation and the access operation to be synchronized, thereby effectively preventing the voltage mutation at the output end of the energy storage system. , reducing the possibility of system downtime.
  • the first switch module S1 when the first switch module S1 is in the off state, if you need to "control the first switch module S1 to be in the off state", you do not need to take any action; when the first switch module S1 is in the off state, if you need to "control the first switch module S1 to be in the off state" "One switch module S1 is in the connected state", then the first switch module S1 needs to be switched to the connected state.
  • sending corresponding operation instructions and the operation time to all N target controllers specifically includes: sending corresponding operation instructions and the operation time to all M controllers, where, when N When the operation instructions corresponding to the target controllers are bypass operations, the operation instructions corresponding to the remaining M-N controllers are access operations; when the operation instructions corresponding to the N target controllers are access operations, the remaining M-N control The operation command corresponding to the controller is bypass operation.
  • N target controllers and the remaining M-N controllers usually need to perform reverse operations.
  • both the first and second status information include the SOC (State Of Charge) value of the energy storage battery 11;
  • first status information and M-1 second status information select the first main controller from the M controllers 12, sort the M controllers 12 to obtain the sorting queue
  • it includes: based on the first preset algorithm and M SOC values, selecting the first main controller from the M controllers 12; when the corresponding energy storage battery 11 is in the charging state, the SOC value is selected in order from small to large. Sort the M controllers 12 to obtain a sorting queue; when the corresponding energy storage battery 11 is in a discharge state, sort the M controllers 12 in order from large to small in SOC value to obtain a sorting queue;
  • the M controllers 12 are sorted in order from small to large SOC values to obtain a sorting queue, so that the energy storage battery 11 with a higher SOC value can be bypassed; conversely, when discharging, The energy storage battery 11 with a lower SOC value needs to be bypassed.
  • a detector can be provided to determine whether the current flows from the positive electrode 1A to the negative electrode 1B? Or does it flow from negative electrode 1B to positive electrode 1A? Then determine whether the energy storage battery 11 is in a charging state? Or is the energy storage battery 11 in a charging state?
  • the "generating operation instructions corresponding to N target controllers, and the operation instructions corresponding to the N target controllers are all the same" specifically includes: generating bypass operation instructions corresponding to N target controllers.
  • both the first and second status information include the health value of the energy storage battery 11.
  • first status information and M-1 second status information select the first main controller from the M controllers 12, sort the M controllers 12 to obtain the sorting queue" Specifically, it includes: selecting the first main controller from the M controllers 12 based on the first preset algorithm and M health values; sorting the M controllers 12 in descending order of health values to obtain a sorting queue. ;
  • the "generating operation instructions corresponding to N target controllers, and the operation instructions corresponding to the N target controllers are all the same" specifically includes: generating bypass operation instructions corresponding to N target controllers.
  • the energy storage battery 11 with a lower health value needs to be bypassed.
  • attribute value indicates that the energy storage battery 11 is healthier
  • the score corresponding to the attribute value will be The higher the value, otherwise the lower; then, summing these attribute values gives you the health value.
  • the weight corresponding to each attribute value can be different; the maximum value of the winning score for different attribute values is the same, and the corresponding minimum value is also equal, that is, different attribute values have the same score interval.
  • Step 1 Select the second main controller from the remaining M-1 controllers 12 through the second preset algorithm; here, the second preset algorithm can be set according to actual needs, for example, these M controllers Send its own status information to the communication network 2, so that each controller 12 can obtain the status information of all M controllers 12, and then execute the same second preset algorithm to obtain the controller; in addition, It is also possible to write directly to the second master controller at each controller 12.
  • Step 2 The controller sends the first message to the second main controller through the communication network 2.
  • the first message contains the first timestamp T1 when the first message leaves the controller;
  • Step 3 Receive the second message sent back by the second main controller.
  • the second message includes the second timestamp T2 when the first message arrives at the second main controller, and the second message leaves the second main controller.
  • the third timestamp of the controller is T3, and the fourth timestamp of the second message received by the controller is T4;
  • sending the first and second messages between the controller and the second master controller also takes time T
  • T2-T1 includes both the time T and the time difference.
  • a check code such as a CRC (Cyclic Redundancy Check) code, etc.
  • CRC Cyclic Redundancy Check
  • the configuration voltage of the energy storage system is V; when the operation instructions corresponding to the N target controllers are bypass operations, the sum of the voltages of the energy storage batteries 11 corresponding to the remaining M-N controllers is Sum1,
  • the energy storage system has a configured voltage. After some energy storage batteries 11 are bypassed, the voltage of the remaining energy storage batteries 11 should meet the requirements of the configured voltage, that is, the difference from the configured voltage is Within a small range [-1*error threshold, error threshold].
  • Embodiment 3 of the present invention provides a control device for the controller in Embodiment 1, including the following modules:
  • a time synchronization module used to perform time synchronization with the remaining M-1 controllers 12 based on the communication network 2;
  • the selection module is used to obtain the first status information of the energy storage battery 11 corresponding to this controller, send the first status information to the remaining M-1 controllers 12 based on the communication network 2, and receive the remaining M-1 Second status information sent by controllers 12; based on the first preset algorithm, first status information and M-1 second status information, select the first main controller from M controllers 12, and The controllers 12 are sorted to obtain a sorting queue; from the end of the queue toward the head of the queue, N target controllers are selected from the sorting sequence, and operation instructions corresponding to the N target controllers are generated, and the operation instructions corresponding to the N target controllers are generated.
  • the operation instructions are the same, wherein the operation instructions are used to represent the bypass operation or access operation of the energy storage battery 11, N is a natural number, N ⁇ M;
  • An instruction sending module configured to generate an operation time when the current controller is the first main controller, and send corresponding operation instructions and the operation time to all N target controllers, where the operation time is later than the current time.
  • the instruction execution module is configured to perform the following operations at the received operation time when receiving the operation instruction and the operation time: when the received operation instruction represents the bypass operation, control the first switch module S1 to be in the off state, The second switch module S2 is controlled to be in the connected state; when the received operation instruction represents an access operation, the first switch module S1 is controlled to be in the connected state, and the second switch module S2 is controlled to be in the disconnected state.
  • Embodiment 3 of the present invention provides an electronic device, including: a memory for storing executable instructions; and a processor for implementing the control method in Embodiment 1 when executing the executable instructions stored in the memory.
  • Embodiment 3 of the present invention provides a storage medium that stores executable instructions for causing a processor to implement the control method in Embodiment 1 when executed.

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Abstract

本发明提供一种储能系统及其控制方法、装置、电子设备及存储介质，该储能系统包括：多个相互串联的电池装置和通信网络，电池装置包含有正电极和负电极，电池装置包含有储能电池、控制器、第一和第二开关，多个控制器基于通信网络能够通信；储能电池的正极电连接到第一开关的第一端，正电极和第二开关的第一端均与第一开关的第二端电连接，第二开关的第二端与储能电池的负极电连接；控制器能够控制第一开关中的第一、第二端之间的连接和断开，以及控制第二开关中的第一、第二端之间的连接和断开。该多个电池装置能够同时进行断开和接入操作。

Description

储能系统及其控制方法、装置、电子设备及存储介质
本申请要求了申请日为2022年07月08日，申请号为202210806591.6，发明名称为“储能系统及其控制方法、装置、电子设备及存储介质”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
本发明涉及储能技术领域，尤其涉及一种储能系统及其控制方法、装置、电子设备及存储介质。
背景技术
随着新能源汽车的普及，以及“碳中和”，“碳达峰”等目标的提出，整个社会的能源结构在向电能转变，其中，新能源汽车中需要设置有储能系统，在光伏发电、风力发电中，也会需要设置有储能系统。
在实际中，储能系统通常都是有多个相互串联的电池装置组成，为了提高储能系统的稳定性，通常会多设置一些电池装置，即电池数量会有一些冗余，在出现单个电池装置因过压、欠压、过温等原因导致单个电池装置无法正常工作，从而整个串联回路都不能工作，从而需要将这些电池装置给旁路掉，剩余的电池装置给接入该串联回路中；此外，在充电、放电过程，也有可能需要旁路掉某些电池装置，剩余的电池装置给接入到串联回路中。可以理解的是，如果在使用过程中，这些旁路和接入的操作需要同步进行，否则，会出现该储能系统的输出端的电压突变，从而导致系统宕机，无法工作。
发明内容
本发明的目的在于提供一种储能系统及其控制方法、装置、电子设备及存储介质。
为了实现上述发明目的之一，本发明一实施方式提供了一种储能系统，包括：M个相互串联的电池装置和通信网络，所述电池装置包含有正电极和负电极，所述电池装置包含有储能电池、控制器、第一开关模块和第二开关模块，M个控制器基于所述通信网络能够相互通信，其中，M为自然数，M≥2；所述储能电池的正极电连接到第一开关模块的第一端，正电极和第二开关模块的第一端均与第一开关模块的第二端电连接，第二开关模块的第二端与储能电池的负极电连接；所述控制器能够控制第一开关模块中的第一、第二端之间的连接和断开，以及控制第二开关模块中的第一、第二端之间的连接和断开。
作为本发明一实施方式的进一步改进，第一、第二开关模块均为开关三极管，在第一、第二 开关模块中，第一端为集电极和发射极中的一个，第二端为集电极和发射极中的另外一个；所述控制器与第一开关模块的基极电连接，还与第二开关模块的基极电连接。
本发明实施例还提供了一种控制器的控制方法，包括以下步骤：基于所述通信网络，与其余的M-1个控制器进行时间同步；获取本控制器对应的储能电池的第一状态信息，并基于所述通信网络向其余M-1个控制器都发送第一状态信息，并接收其余M-1个控制器所发送的第二状态信息；基于第一预设算法、第一状态信息和M-1个第二状态信息，从M个控制器中选出第一主控制器，对M个控制器进行排序得到排序队列；从队尾朝向队头的方向，从所述排序序列中选择出N个目标控制器，生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同，其中，所述操作指令用于表征对储能电池进行旁路操作或接入操作，N为自然数，N≤M；当本控制器为所述第一主控制器时，生成操作时间，向N个目标控制器都发送对应的操作指令以及所述操作时间，其中，操作时间晚于当前时间；当接收到操作指令以及操作时间时，在所接收到的操作时间执行以下操作：当所接收到的操作指令表征旁路操作时，控制第一开关模块处于断开状态，控制第二开关模块处于连接状态；当所接收到的操作指令表征接入操作时，控制第一开关模块处于连接状态，控制第二开关模块处于断开状态。
作为本发明一实施方式的进一步改进，所述“向N个目标控制器都发送对应的操作指令以及所述操作时间”具体包括：向M个控制器都发送对应的操作指令以及所述操作时间，其中，当N个目标控制器对应的操作指令为旁路操作时，剩余的M-N个控制器对应的操作指令为接入操作；当N个目标控制器对应的操作指令为接入操作时，剩余的M-N个控制器对应的操作指令为旁路操作。
作为本发明一实施方式的进一步改进，第一、第二状态信息均包括储能电池的SOC值；所述“基于第一预设算法、第一状态信息和M-1个第二状态信息，对M个控制器选出第一主控制器，对M个控制器进行排序得到排序队列”具体包括：基于第一预设算法、M个SOC值，从M个控制器中选出第一主控制器；当所对应的储能电池处于充电状态时，按照SOC值从小到大的顺序对M个控制器进行排序得到排序队列；当所对应的储能电池处于放电状态时，按照SOC值从大到小的顺序对M个控制器进行排序得到排序队列；所述“生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同”具体包括：生成N个目标控制器对应的旁路操作指令。
作为本发明一实施方式的进一步改进，第一、第二状态信息均包括储能电池的健康值，所述储能电池的健康状况越优，所对应的健康值越高；所述“基于第一预设算法、第一状态信息和M-1个第二状态信息，对M个控制器选出第一主控制器，对M个控制器进行排序得到排序队列”具体包括：基于第一预设算法、M个健康值，从M个控制器中选出第一主控制器；按照健康值从 大到小的顺序对M个控制器进行排序得到排序队列；所述“生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同”具体包括：生成N个目标控制器对应的旁路操作指令。
作为本发明一实施方式的进一步改进，所述“基于所述通信网络，与其余的M-1个控制器进行时间同步”具体包括：通过第二预设算法从其余的M-1个控制器中选择出第二主控制器；本控制器通过所述通信网络向第二主控制器发送第一报文，第一报文包含有第一报文离开本控制器时的第一时间戳T1；接收第二主控制器发回的第二报文，第二报文包括第一报文到达第二主控制器时的第二时间戳T2、以及第二报文离开第二主控制器时的第三时间戳T3，本控制器接收到第二报文的第四时间戳为T4；本控制器相对于第二主控制器之间的时间差＝((T2-T1)+(T3-T4))/2，基于所述时间差对本控制器的时间进行校正。
作为本发明一实施方式的进一步改进，所述储能系统的配置电压为V；当N个目标控制器对应的操作指令为旁路操作时，剩余的M-N个控制器对应的储能电池的电压总和为Sum1，|Sum1-V|≤误差阈值；当N个目标控制器对应的操作指令为接入操作时，N个目标控制器对应的储能电池的电压总和为Sum2，|Sum2-V|≤误差阈值；其中，误差阈值>0。
本发明实施例还提供了一种控制器的控制装置，包括以下模块：时间同步模块，用于基于所述通信网络，与其余的M-1个控制器进行时间同步；选择模块，用于获取本控制器对应的储能电池的第一状态信息，并基于所述通信网络向其余M-1个控制器都发送第一状态信息，并接收其余M-1个控制器所发送的第二状态信息；基于第一预设算法、第一状态信息和M-1个第二状态信息，从M个控制器中选出第一主控制器，对M个控制器进行排序得到排序队列；从队尾朝向队头的方向，从所述排序序列中选择出N个目标控制器，生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同，其中，所述操作指令用于表征对储能电池进行旁路操作或接入操作，N为自然数，N≤M；指令发送模块，用于当本控制器为所述第一主控制器时，生成操作时间，向N个目标控制器都发送对应的操作指令以及所述操作时间，其中，操作时间晚于当前时间；指令执行模块，用于当接收到操作指令以及操作时间时，在所接收到的操作时间执行以下操作：当所接收到的操作指令表征旁路操作时，控制第一开关模块处于断开状态，控制第二开关模块处于连接状态；当所接收到的操作指令表征接入操作时，控制第一开关模块处于连接状态，控制第二开关模块处于断开状态。
本发明实施例还提供了一种电子设备，包括：存储器，用于存储可执行指令；处理器，用于执行所述存储器中存储的可执行指令时，实现上述的控制方法。
本发明实施例还提供了一种存储介质，存储有可执行指令，用于引起处理器执行时，实现上述的控制方法。
相对于现有技术，本发明的技术效果在于：本发明实施例提供一种储能系统及其控制方法、装置、电子设备及存储介质，该储能系统包括：多个相互串联的电池装置和通信网络，电池装置包含有正电极和负电极，电池装置包含有储能电池、控制器、第一开关模块和第二开关模块，多个控制器基于通信网络能够相互通信；储能电池的正极电连接到第一开关模块的第一端，正电极和第二开关模块的第一端均与第一开关模块的第二端电连接，第二开关模块的第二端与储能电池的负极电连接；控制器能够控制第一开关模块中的第一、第二端之间的连接和断开，以及控制第二开关模块中的第一、第二端之间的连接和断开。该多个电池装置能够同时进行断开和接入操作。
附图说明
图1是本发明实施例中的储能系统的结构示意图；
图2是本发明实施例中的控制方法的流程示意图。
具体实施方式
以下将结合附图所示的各实施方式对本发明进行详细描述。但这些实施方式并不限制本发明，本领域的普通技术人员根据这些实施方式所做出的结构、方法、或功能上的变换均包含在本发明的保护范围内。
本文使用的例如“上”、“上方”、“下”、“下方”等表示空间相对位置的术语是出于便于说明的目的来描述如附图中所示的一个单元或特征相对于另一个单元或特征的关系。空间相对位置的术语可以旨在包括设备在使用或工作中除了图中所示方位以外的不同方位。例如，如果将图中的设备翻转，则被描述为位于其他单元或特征“下方”或“之下”的单元将位于其他单元或特征“上方”。因此，示例性术语“下方”可以囊括上方和下方这两种方位。设备可以以其他方式被定向(旋转90度或其他朝向)，并相应地解释本文使用的与空间相关的描述语。
本实施例一提供了一种储能系统，如图1所示，包括：
M个相互串联的电池装置1和通信网络2，所述电池装置1包含有正电极1A和负电极1B，所述电池装置1包含有储能电池11、控制器12、第一开关模块S1和第二开关模块S2，M个控制器12基于所述通信网络2能够相互通信，其中，M为自然数，M≥2；这里，该储能电池11中可以包含有多个电芯，这些电芯串联或并联从而构成了该储能电池11，该储能电池11可以为镍氢电池、镍镉电池和锂电池等，该控制器12可以单片机等，该通信网络2可以为以太网，光纤网络，CAN(Controller Area Network，控制器域网)等。可以理解的是，在该储能系统中，电池装置1的数量是可以根据实际需要进行增减的。
这里，每个电池装置1中都包含有一个控制器12，即每个电池装置1都可以对其中的储能 电池11进行独立的控制，即该储能系统是一个分布式的控制系统，可以理解的是，在该储能系统中，当某个电池装置1发生损坏时，只需要将该电池装置1给旁路出去，该储能系统依然能够正常的工作。
这里，为了便于区分和处理不同的控制器12，可以给不同的控制器12赋予不同的名称，即每个控制器12都具有唯一的标识符(该标识符也可以认为是电池装置1的标识符)。此外，每个控制器12中都设置有一个通信模块。
所述储能电池11的正极电连接到第一开关模块S1的第一端，正电极1A和第二开关模块S2的第一端均与第一开关模块S1的第二端电连接，第二开关模块S2的第二端与储能电池11的负极电连接；
所述控制器12能够控制第一开关模块S1中的第一、第二端之间的连接和断开，以及控制第二开关模块S2中的第一、第二端之间的连接和断开。
这里，如图1所示，在一个电池装置1中，当第一开关模块S1处于连接状态，且第二开关模块S2处于断开状态时，电池装置1接入到该储能系统中；当第一开关模块S1处于断开状态，且第二开关模块S2处于连接状态时，电池装置1处于旁路状态，即没有接入到该储能系统中。
这里，如图1所示，M个相互串联的电池装置1相互之间是串联的，即对于相邻的两个电池装置1而言，其中的一个电池装置1的正电极1A与另一个电池装置1的负电极1B电连接。此外，该电池系统中，还设置有正极输出端口3A和负极输出端口3B。
本实施例中，第一、第二开关模块均为开关三极管，在第一、第二开关模块中，第一端为集电极和发射极中的一个，第二端为集电极和发射极中的另外一个；所述控制器12与第一开关模块S1的基极电连接，还与第二开关模块S2的基极电连接。这里，控制器2可以通过控制第一、第二开关模块的基极的电压，从而控制第一、第二开关模块的集电极和发射极之间的连接和断开。
本发明实施例二提供了一种实施例一中的控制器12的控制方法，这里，控制器12可以每隔一个预设的时间就执行一次该控制方法。例如，每隔60S等；此外，该控制器12会实时的监测其对应的储能电池11的状态值(例如，电压，温度，SOC、最高单体电压、最低单体电压和电流等)，当该状态值不在预设范围内时，就可以向所有的控制器12发送执行命令，于是每个控制器12就会执行该控制方法；在储能系统中，共有M个控制器12，每个控制器12都能够执行该控制方法；如图2所示，包括以下步骤：
步骤201：基于所述通信网络2，与其余的M-1个控制器12进行时间同步；在该储能系统中，M个控制器12都有自己独立的系统时钟，为了消除各个控制器12之间的时间误差，需要对M个控制器12进行时间同步。
步骤202：获取本控制器对应的储能电池11的第一状态信息，并基于所述通信网络2向其余M-1个控制器12都发送第一状态信息，并接收其余M-1个控制器12所发送的第二状态信息；基于第一预设算法、第一状态信息和M-1个第二状态信息，从M个控制器12中选出第一主控制器，对M个控制器12进行排序得到排序队列；从队尾朝向队头的方向，从所述排序序列中选择出N个目标控制器，生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同，其中，所述操作指令用于表征对储能电池11进行旁路操作或接入操作，N为自然数，N≤M；
这里，在实际中，当某个控制器执行该控制方法时，则该控制器即为“本控制器”，第一、第二状态信息可以包括：储能电池11的电压、储能电池11的电流和储能电池11的温度等。这里，“基于第一预设算法、第一状态信息和M-1个第二状态信息，对M个控制器12进行排序得到排序队列”可以理解为：基于第一预设算法对每个控制器12的状态信息进行处理，从而得到M个控制器12一一对应的M个打分，然后按照分值从小到大、或从大到小的顺序进行排序得到排序队列，然后，再选N个进行操作。例如：基于第一、第二状态信息，可以按照储能电池11的质量对每个储能电池11进行打分(质量越好，分值越高)，将M个储能电池11以从高分到低分的次序进行排列，然后，选择出N个进行旁路操作，其余M-N个进行接入操作；此外，在充电时，基于第一、第二状态信息，可以按照储能电池11的剩余电量对每个储能电池11进行打分(剩余电量越多，分值越高)，将M个储能电池11以从高分到低分的次序进行排列，然后，选择出N个进行接入操作，其余M-N个进行旁路操作；此外，在放电时，基于第一、第二状态信息，可以按照储能电池11的剩余电量对每个储能电池11进行打分(剩余电量越多，分值越高)，将M个储能电池11以从低分到高分的次序进行排列，然后，选择出N个进行接入操作，其余M-N个进行旁路操作。
步骤203：当本控制器为所述第一主控制器时，生成操作时间，向N个目标控制器都发送对应的操作指令以及所述操作时间，其中，操作时间晚于当前时间；这里，每个控制器的操作时间都是相同的，可以理解的是，当本控制器为第一主控制器时，也向本控制器发送对应的操作指令以及所述操作时间。在实际中，基于该通信网络2，在向N个目标控制器都发送对应的操作指令以及所述操作时间时，为了防止数据出错，可以在数据包中增加校验码，例如，CRC(Cyclic Redundancy Check，循环冗余校验)码等。
步骤204：当接收到操作指令以及操作时间时，在所接收到的操作时间执行以下操作：当所接收到的操作指令表征旁路操作时，控制第一开关模块S1处于断开状态，控制第二开关模块S2处于连接状态；当所接收到的操作指令表征接入操作时，控制第一开关模块S1处于连接状态，控制第二开关模块S2处于断开状态。这里，在实际中，可以设置一个定时器，该定时器在该操 作时间时超时，然后，就可以立即执行“以下操作”了。
这里，由于事先进行了时间同步，从而每个控制器能够在同一时间执行该操作指令，从而能够让旁路操作和接入操作同步进行，进而能够有效的防止该储能系统的输出端的电压突变，降低了系统宕机的可能性。
这里，当第一开关模块S1处于断开状态，如果需要“控制第一开关模块S1处于断开状态”，则无需进行任何动作；当第一开关模块S1处于断开状态，如果需要“控制第一开关模块S1处于连接状态”，则需要将第一开关模块S1切换为连接状态。当第一开关模块S1处于连接状态，如果需要“控制第一开关模块S1处于连接状态”，则无需进行任何动作；当第一开关模块S1处于连接状态，如果需要“控制第一开关模块S1处于断开状态”，则需要将第一开关模块S1切换为断开状态。同理，本领域技术人员可以想象得出第二开关模块S2的情形。
在发明人的长期实验中，发现利用该控制方法时，不同控制器在执行接入操作或旁路操作时，时间的误差在0.1ms～10ms内，从而能够有效的防止该储能系统的输出端的电压突变，降低了系统宕机的可能性。
本实施例中，所述“向N个目标控制器都发送对应的操作指令以及所述操作时间”具体包括：向M个控制器都发送对应的操作指令以及所述操作时间，其中，当N个目标控制器对应的操作指令为旁路操作时，剩余的M-N个控制器对应的操作指令为接入操作；当N个目标控制器对应的操作指令为接入操作时，剩余的M-N个控制器对应的操作指令为旁路操作。这里，在实际中，N个目标控制器和剩余的M-N个控制器通常需要进行反向操作。
本实施例中，第一、第二状态信息均包括储能电池11的SOC(State Of Charge，荷电状态)值；
所述“基于第一预设算法、第一状态信息和M-1个第二状态信息，对M个控制器12选出第一主控制器，对M个控制器12进行排序得到排序队列”具体包括：基于第一预设算法、M个SOC值，从M个控制器12中选出第一主控制器；当所对应的储能电池11处于充电状态时，按照SOC值从小到大的顺序对M个控制器12进行排序得到排序队列；当所对应的储能电池11处于放电状态时，按照SOC值从大到小的顺序对M个控制器12进行排序得到排序队列；
这里，当充电时，按照SOC值从小到大的顺序对M个控制器12进行排序得到排序队列，从而就可以让SOC值较高的储能电池11给旁路掉；反之，当放电时，需要让SOC值较低的储能电池11给旁路掉。如图1所示，当电流从正电极1A流向负电极1B，该储能系统处于充电状态，则该储能电池11处于“充电”状态(虽然该储能电池11有可能处于旁路状态，但也可以认为处于充电状态)；反之，当电流从负电极1B流向正电极1A，该储能系统处于放电状态，则该储能 电池11处于“放电”状态(虽然该储能电池11有可能处于旁路状态，但也可以认为处于充电状态)。综上所述，在每个电池装置1中，可以设置有一个探测器，来判断电流是从正电极1A流向负电极1B？还是从负电极1B流向正电极1A？进而判断储能电池11是处于充电状态？还是处于储能电池11处于充电状态？
所述“生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同”具体包括：生成N个目标控制器对应的旁路操作指令。
本实施例中，第一、第二状态信息均包括储能电池11的健康值，所述储能电池11的健康状况越优，所对应的健康值越高；
所述“基于第一预设算法、第一状态信息和M-1个第二状态信息，对M个控制器12选出第一主控制器，对M个控制器12进行排序得到排序队列”具体包括：基于第一预设算法、M个健康值，从M个控制器12中选出第一主控制器；按照健康值从大到小的顺序对M个控制器12进行排序得到排序队列；
所述“生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同”具体包括：生成N个目标控制器对应的旁路操作指令。
这里，在实际使用过程中，需要将健康值较低的储能电池11给旁路掉。可以先获取储能电池11的多个属性值(例如，电压、温度等)，然后，对每个属性值进行评分，当该属性值表示储能电池11越健康时，该属性值对应的分值就越高，否则，就越低；然后，将这些属性值求和，就得到了健康值。可选的，每个属性值对应的权重可以不一样；不同属性值赌赢的分值的最大值相等，对应的最小值也相等，即不同的属性值具有相同的分值区间。
本实施例中，所述“基于所述通信网络2，与其余的M-1个控制器12进行时间同步”：
步骤1：通过第二预设算法从其余的M-1个控制器12中选择出第二主控制器；这里，可以根据实际需要来设置第二预设算法，例如，这M个控制器都向该通信网络2中发送自己的状态信息，于是，每个控制器12都能够获取到所有M个控制器12的状态信息，然后执行相同的第二预设算法来得到该控制器；此外，还可以在每个控制器12直接写入第二主控制器。
步骤2：本控制器通过所述通信网络2向第二主控制器发送第一报文，第一报文包含有第一报文离开本控制器时的第一时间戳T1；
步骤3：接收第二主控制器发回的第二报文，第二报文包括第一报文到达第二主控制器时的第二时间戳T2、以及第二报文离开第二主控制器时的第三时间戳T3，本控制器接收到第二报文的第四时间戳为T4；
步骤4：本控制器相对于第二主控制器之间的时间差＝((T2-T1)+(T3-T4))/2，基于所述时间 差对本控制器的时间进行校正。
这里，可以理解的是，在本控制器和第二主控制器之间发送第一、第二报文也是需要耗费时间T，与T2-T1既包含了耗费时间T也包含时间差，同样T3-T4既包含了耗费时间(为-1*T)也包含时间差，因此，时间差＝((T2-T1)+(T3-T4))/2。
可选的，为了提高第一、第二报文的完整性，可以在第一、第二报文中增加校验码，例如，CRC(Cyclic Redundancy Check，循环冗余校验)码等。
本实施例中，所述储能系统的配置电压为V；当N个目标控制器对应的操作指令为旁路操作时，剩余的M-N个控制器对应的储能电池11的电压总和为Sum1，|Sum1-V|≤误差阈值；当N个目标控制器对应的操作指令为接入操作时，N个目标控制器对应的储能电池11的电压总和为Sum2，|Sum2-V|≤误差阈值；其中，误差阈值>0。这里，在实际中，储能系统是有配置电压的，当旁路掉一些储能电池11之后，剩余的储能电池11的电压之后应该符合配置电压的要求，即与配置电压的差值在一个很小的范围[-1*误差阈值,误差阈值]内。
本发明实施例三提供了一种实施例一中的控制器的控制装置，包括以下模块：
时间同步模块，用于基于所述通信网络2，与其余的M-1个控制器12进行时间同步；
选择模块，用于获取本控制器对应的储能电池11的第一状态信息，并基于所述通信网络2向其余M-1个控制器12都发送第一状态信息，并接收其余M-1个控制器12所发送的第二状态信息；基于第一预设算法、第一状态信息和M-1个第二状态信息，从M个控制器12中选出第一主控制器，对M个控制器12进行排序得到排序队列；从队尾朝向队头的方向，从所述排序序列中选择出N个目标控制器，生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同，其中，所述操作指令用于表征对储能电池11进行旁路操作或接入操作，N为自然数，N≤M；
指令发送模块，用于当本控制器为所述第一主控制器时，生成操作时间，向N个目标控制器都发送对应的操作指令以及所述操作时间，其中，操作时间晚于当前时间；
指令执行模块，用于当接收到操作指令以及操作时间时，在所接收到的操作时间执行以下操作：当所接收到的操作指令表征旁路操作时，控制第一开关模块S1处于断开状态，控制第二开关模块S2处于连接状态；当所接收到的操作指令表征接入操作时，控制第一开关模块S1处于连接状态，控制第二开关模块S2处于断开状态。
本发明实施例三提供了一种电子设备，包括：存储器，用于存储可执行指令；处理器，用于执行所述存储器中存储的可执行指令时，实现实施例一中的控制方法。
本发明实施例三提供了一种存储介质，存储有可执行指令，用于引起处理器执行时，实现实 施例一中的控制方法。
应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，各实施方式中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方式。
上文所列出的一系列的详细说明仅仅是针对本发明的可行性实施方式的具体说明，它们并非用以限制本发明的保护范围，凡未脱离本发明技艺精神所作的等效实施方式或变更均应包含在本发明的保护范围之内。

Claims (11)

  1. 一种储能系统，其特征在于，包括：
    M个相互串联的电池装置(1)和通信网络(2)，所述电池装置(1)包含有正电极(1A)和负电极(1B)，所述电池装置(1)包含有储能电池(11)、控制器(12)、第一开关模块(S1)和第二开关模块(S2)，M个控制器(12)基于所述通信网络(2)能够相互通信，其中，M为自然数，M≥2；
    所述储能电池(11)的正极电连接到第一开关模块(S1)的第一端，正电极(1A)和第二开关模块(S2)的第一端均与第一开关模块(S1)的第二端电连接，第二开关模块(S2)的第二端与储能电池(11)的负极电连接；
    所述控制器(12)能够控制第一开关模块(S1)中的第一、第二端之间的连接和断开，以及控制第二开关模块(S2)中的第一、第二端之间的连接和断开。
  2. 根据权利要求1所述的储能系统，其特征在于：
    第一、第二开关模块均为开关三极管，在第一、第二开关模块中，第一端为集电极和发射极中的一个，第二端为集电极和发射极中的另外一个；
    所述控制器(12)与第一开关模块(S1)的基极电连接，还与第二开关模块(S2)的基极电连接。
  3. 一种权利要求1或2中的控制器的控制方法，其特征在于，包括以下步骤：
    基于所述通信网络(2)，与其余的M-1个控制器(12)进行时间同步；
    获取本控制器对应的储能电池(11)的第一状态信息，并基于所述通信网络(2)向其余M-1个控制器(12)都发送第一状态信息，并接收其余M-1个控制器(12)所发送的第二状态信息；基于第一预设算法、第一状态信息和M-1个第二状态信息，从M个控制器(12)中选出第一主控制器，对M个控制器(12)进行排序得到排序队列；从队尾朝向队头的方向，从所述排序序列中选择出N个目标控制器，生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同，其中，所述操作指令用于表征对储能电池(11)进行旁路操作或接入操作，N为自然数，N≤M；
    当本控制器为所述第一主控制器时，生成操作时间，向N个目标控制器都发送对应的操作指令以及所述操作时间，其中，操作时间晚于当前时间；
    当接收到操作指令以及操作时间时，在所接收到的操作时间执行以下操作：当所接收到的操作指令表征旁路操作时，控制第一开关模块(S1)处于断开状态，控制第二开关模块(S2)处于 连接状态；当所接收到的操作指令表征接入操作时，控制第一开关模块(S1)处于连接状态，控制第二开关模块(S2)处于断开状态。
  4. 根据权利要求3所述的控制方法，其特征在于，所述“向N个目标控制器都发送对应的操作指令以及所述操作时间”具体包括：
    向M个控制器都发送对应的操作指令以及所述操作时间，其中，当N个目标控制器对应的操作指令为旁路操作时，剩余的M-N个控制器对应的操作指令为接入操作；当N个目标控制器对应的操作指令为接入操作时，剩余的M-N个控制器对应的操作指令为旁路操作。
  5. 根据权利要求3所述的控制方法，其特征在于，
    第一、第二状态信息均包括储能电池(11)的SOC值；
    所述“基于第一预设算法、第一状态信息和M-1个第二状态信息，对M个控制器(12)选出第一主控制器，对M个控制器(12)进行排序得到排序队列”具体包括：基于第一预设算法、M个SOC值，从M个控制器(12)中选出第一主控制器；当所对应的储能电池(11)处于充电状态时，按照SOC值从小到大的顺序对M个控制器(12)进行排序得到排序队列；当所对应的储能电池(11)处于放电状态时，按照SOC值从大到小的顺序对M个控制器(12)进行排序得到排序队列；
    所述“生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同”具体包括：生成N个目标控制器对应的旁路操作指令。
  6. 根据权利要求3所述的控制方法，其特征在于，
    第一、第二状态信息均包括储能电池(11)的健康值，所述储能电池(11)的健康状况越优，所对应的健康值越高；
    所述“基于第一预设算法、第一状态信息和M-1个第二状态信息，对M个控制器(12)选出第一主控制器，对M个控制器(12)进行排序得到排序队列”具体包括：基于第一预设算法、M个健康值，从M个控制器(12)中选出第一主控制器；按照健康值从大到小的顺序对M个控制器(12)进行排序得到排序队列；
    所述“生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同”具体包括：生成N个目标控制器对应的旁路操作指令。
  7. 根据权利要求3所述的控制方法，其特征在于，所述“基于所述通信网络(2)，与其余的M-1个控制器(12)进行时间同步”具体包括：
    通过第二预设算法从其余的M-1个控制器(12)中选择出第二主控制器；
    本控制器通过所述通信网络(2)向第二主控制器发送第一报文，第一报文包含有第一报文 离开本控制器时的第一时间戳T1；
    接收第二主控制器发回的第二报文，第二报文包括第一报文到达第二主控制器时的第二时间戳T2、以及第二报文离开第二主控制器时的第三时间戳T3，本控制器接收到第二报文的第四时间戳为T4；
    本控制器相对于第二主控制器之间的时间差＝((T2-T1)+(T3-T4))/2，基于所述时间差对本控制器的时间进行校正。
  8. 根据权利要求4所述的控制方法，其特征在于：
    所述储能系统的配置电压为V；
    当N个目标控制器对应的操作指令为旁路操作时，剩余的M-N个控制器对应的储能电池(11)的电压总和为Sum1，|Sum1-V|≤误差阈值；当N个目标控制器对应的操作指令为接入操作时，N个目标控制器对应的储能电池(11)的电压总和为Sum2，|Sum2-V|≤误差阈值；其中，误差阈值>0。
  9. 一种权利要求1或2中的控制器的控制装置，其特征在于，包括以下模块：
    时间同步模块，用于基于所述通信网络(2)，与其余的M-1个控制器(12)进行时间同步；
    选择模块，用于获取本控制器对应的储能电池(11)的第一状态信息，并基于所述通信网络(2)向其余M-1个控制器(12)都发送第一状态信息，并接收其余M-1个控制器(12)所发送的第二状态信息；基于第一预设算法、第一状态信息和M-1个第二状态信息，从M个控制器(12)中选出第一主控制器，对M个控制器(12)进行排序得到排序队列；从队尾朝向队头的方向，从所述排序序列中选择出N个目标控制器，生成N个目标控制器对应的操作指令，N个目标控制器对应的操作指令均相同，其中，所述操作指令用于表征对储能电池(11)进行旁路操作或接入操作，N为自然数，N≤M；
    指令发送模块，用于当本控制器为所述第一主控制器时，生成操作时间，向N个目标控制器都发送对应的操作指令以及所述操作时间，其中，操作时间晚于当前时间；
    指令执行模块，用于当接收到操作指令以及操作时间时，在所接收到的操作时间执行以下操作：当所接收到的操作指令表征旁路操作时，控制第一开关模块(S1)处于断开状态，控制第二开关模块(S2)处于连接状态；当所接收到的操作指令表征接入操作时，控制第一开关模块(S1)处于连接状态，控制第二开关模块(S2)处于断开状态。
  10. 一种电子设备，其特征在于，包括：
    存储器，用于存储可执行指令；
    处理器，用于执行所述存储器中存储的可执行指令时，实现权利要求3至8任一项所述的控 制方法。
  11. 一种存储介质，其特征在于，存储有可执行指令，用于引起处理器执行时，实现权利要求3至8任一项所述的控制方法。
PCT/CN2022/120876 2022-07-08 2022-09-23 储能系统及其控制方法、装置、电子设备及存储介质 Ceased WO2024007455A1 (zh)

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