Energy storage system, its control method, control device and electronic device

Abstract

The present application discloses an energy storage system, comprising: at least two battery clusters of different types, each battery cluster is respectively connected to a management unit, and is respectively connected to an electricity consumption end through a power unit, and the power unit is used to receive an electricity consumption request sent by a monitoring unit of the electricity consumption end; the management unit is used to respond to the electricity consumption request, obtain the status information of each battery cluster, and report the status information to the monitoring unit via the power unit; the monitoring unit confirms the target battery cluster participating in electricity consumption according to the status information and electricity consumption demand, and sends an electricity consumption participation instruction to the management unit of the target battery cluster via the power unit of the target battery cluster; the management unit of the target battery cluster controls the target battery cluster to access the power unit so as to access the electricity consumption end to respond to the electricity consumption request. The energy storage system architecture in the present application can support the mixed use of battery clusters. It improves the production and manufacturing availability of the energy storage system, effectively reduces the cost of the energy storage system, and can extend the service life.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and more specifically, to an energy storage system, a control method for an energy storage system, a control device for an energy storage system, an electronic device, and a computer-readable storage medium. Background Art

[0002] With the rapid development of new energy technologies, energy storage devices have become one of the more important research directions in the new energy field. Currently, single batteries can no longer meet the charging and discharging requirements. Therefore, energy storage systems containing multiple battery clusters have emerged. Among them, multiple battery monomers are first connected to form a battery cluster, and multiple battery clusters are then connected to form the energy storage part in the energy storage system. Usually, in an energy storage system, battery monomers of a single material and health state are used. However, in this way, the production and manufacturing availability of the energy storage system is poor and the cost is high. Summary of the Invention

[0003] In view of the above problems, the present application provides an energy storage system, a control method for an energy storage system, a control device for an energy storage system, an electronic device, and a computer-readable storage medium.

[0004] The present application provides an energy storage system, including: at least two battery clusters of different types, each of the battery clusters is respectively connected to a management unit and is respectively connected to an electricity consumption end through a power unit, the materials and / or health conditions of each of the battery clusters are the same or different, and the charge and discharge rates and charge and discharge cycle numbers of the at least two battery clusters of different types are different, wherein,

[0005] The power unit is configured to receive an electricity consumption request sent by a monitoring unit of the electricity consumption end;

[0006] The management unit is configured to respond to the electricity consumption request, obtain the status information of each of the battery clusters, and report the status information to the monitoring unit via the power unit;

[0007] The monitoring unit determines a target battery cluster participating in electricity consumption according to the status information and electricity consumption demand, and sends an electricity consumption participation instruction to the management unit of the target battery cluster via the power unit of the target battery cluster;

[0008] The management unit of the target battery cluster controls the target battery cluster to access the power unit so as to access the electricity consumption end to respond to the electricity consumption request according to the electricity consumption participation instruction.

[0009] In the energy storage system of the present application, an energy storage system architecture is provided, enabling the energy storage system to support the mixed use of different battery clusters classified based on charge-discharge rate and charge-discharge cycle times, and the materials and / or health states adopted by each battery cluster can also be mixed. This can improve the production and manufacturing availability of the energy storage system. After battery monomers of different material types and health levels are manufactured, they can be mixed, effectively reducing the cost of the energy storage system. During power consumption, according to the self-states of each battery cluster in the energy storage system and the requirements of the power consumption end, the target battery cluster is connected to the power consumption end through the power unit and the management unit to respond to the requirements of the power consumption end, which can effectively improve the safety of the energy storage system and extend its service life.

[0010] In some embodiments, each of the battery clusters is connected to the corresponding power unit through a switching unit, and the management unit of the target battery cluster controls the opening and closing of the switching unit according to the power consumption participation instruction to connect the target battery cluster to the power unit and thus to the power consumption end to respond to the power consumption request.

[0011] In this way, each battery cluster is independently controllable, and the management unit controls the battery cluster corresponding to the target battery cluster to be connected to the power consumption end according to the power consumption participation instruction to meet the requirements of the power consumption end.

[0012] In some embodiments, the management unit is configured to respond to the power consumption request, collect the current parameters of each of the battery clusters, and determine the state information of each of the battery clusters according to the current parameters, where the state information includes the charge-discharge capacity of the battery cluster and the battery cluster state description information.

[0013] In this way, the management unit collects the current parameters of their respective battery clusters according to the power consumption request of the power consumption end, thereby determining the charge-discharge capacity and the battery cluster state description information of each battery cluster, providing data support for determining the target battery cluster participating in power consumption.

[0014] In some embodiments, the monitoring unit confirms the target battery cluster participating in power consumption according to the state information, the output power requirement, and the response time requirement, and sends a power consumption participation instruction to the management unit of the target battery cluster via the power unit of the target battery cluster.

[0015] In this way, the monitoring unit of the power consumption end can determine the target battery cluster participating in power consumption according to the output power, the response time, and the charge-discharge capacity and the state description information of each battery cluster reported by the power unit, and send the power consumption participation instruction to the management unit corresponding to the target battery cluster, so that the management unit connects the target battery cluster to the power consumption end to respond to the requirements of the power consumption end.

[0016] In some embodiments, when the monitoring unit confirms, based on the status information, that the energy storage system can meet the output power demand and the response time demand, the target battery clusters participating in power consumption are confirmed.

[0017] In this way, the monitoring unit first confirms whether the energy storage system can meet the demand of the power consumption side based on the status information. If it can meet the demand, the target battery clusters participating in power consumption are then confirmed.

[0018] In some embodiments, when the monitoring unit confirms, based on the status information, that the energy storage system can meet the output power demand and the response time demand, and all battery clusters are required to participate in power consumption, all the battery clusters in the energy storage system are confirmed as the target battery clusters.

[0019] In this way, if it is determined that all battery clusters are required to participate in power consumption to meet the demand of the power consumption side, all the battery clusters are confirmed as the target battery clusters.

[0020] In some embodiments, when the monitoring unit confirms, based on the status information, that the energy storage system can meet the output power demand and the response time demand, and not all battery clusters are required to participate in power consumption, the target battery clusters are confirmed according to the health degree of the battery clusters from high to low.

[0021] In this way, if not all battery clusters are required to participate to meet the demand of the power consumption side, then the target battery clusters are confirmed according to the health degree of the battery clusters from high to low. When the demand of the power consumption side is met, the target battery clusters with better health degrees are preferentially selected, so as to improve the overall service life of the energy storage system.

[0022] In some embodiments, when the monitoring unit confirms, based on the status information, that the energy storage system cannot meet the output power demand and / or the response time demand, all the battery clusters in the energy storage system are confirmed as the target battery clusters.

[0023] In this way, if the current energy storage system cannot meet the demand of the power consumption side, all the battery clusters are determined as the target battery clusters, so as to try to meet the demand of the power consumption side.

[0024] The present application provides a control method based on the above energy storage system. The control method includes:

[0025] In response to a power consumption request sent by the power consumption side connected to the energy storage system, obtaining the status information of each battery cluster in the energy storage system;

[0026] Reporting the status information to the power consumption side;

[0027] In response to the received power consumption participation instruction sent by the power consumption end, control the target battery cluster to access the power consumption end to respond to the power consumption request, where the power consumption end determines the target battery cluster participating in power consumption according to the status information and power consumption demand, so as to generate the power consumption participation instruction.

[0028] In this way, based on the provided energy storage system architecture in this application, the energy storage system can support the mixed use of different battery clusters classified based on charge-discharge rate and charge-discharge cycle times, and the materials and / or health states adopted by each battery cluster can also be mixed. It can improve the production and manufacturing availability of the energy storage system. Battery monomers of different material types and health levels can be mixed after being manufactured, effectively reducing the cost of the energy storage system. During power consumption, according to the self-states of each battery cluster in the energy storage system and the demand of the power consumption end, the target battery cluster is accessed to the power consumption end through the power unit and the management unit to respond to the demand of the power consumption end, which can effectively improve the safety of the energy storage system and extend its service life.

[0029] In some embodiments, the obtaining the status information of each battery cluster in the energy storage system in response to the power consumption request sent by the power consumption end accessed by the energy storage system includes:

[0030] Collect the current parameters of each battery cluster;

[0031] Determine the status information of each battery cluster according to the current parameters, where the status information includes the charge-discharge capacity of the battery cluster and the battery cluster status description information.

[0032] In this way, according to the power consumption request of the power consumption end, the current parameters of each battery cluster are collected, so as to determine the charge-discharge capacity and the battery cluster status description information of each battery cluster, providing data support for determining the target battery cluster participating in power consumption.

[0033] In some embodiments, the controlling the target battery cluster to access the power consumption end to respond to the power consumption request in response to the received power consumption participation instruction sent by the power consumption end includes:

[0034] In response to the received power consumption participation instruction generated by the power consumption end confirming the target battery cluster participating in power consumption according to the output power demand, response time demand and the status information, control the target battery cluster to access the power consumption end to respond to the power consumption request.

[0035] In this way, the power consumption end can determine the target battery cluster participating in power consumption according to the output power, response time and the reported charge-discharge capacity and status description information of each battery cluster, and issue the power consumption participation instruction, so as to connect the target battery cluster to the power consumption end to respond to the demand of the power consumption end.

[0036] In some embodiments, controlling the target battery cluster to connect to the power consumption end to respond to the power consumption request in response to the received power consumption participation instruction generated by the target battery cluster for power consumption confirmed by the power consumption end according to the output power demand, response time demand, and the status information includes:

[0037] In response to the received first power consumption participation instruction sent by the power consumption end, controlling all battery clusters to connect to the power consumption end to respond to the power consumption request, where the power consumption end, when confirming according to the status information that the energy storage system can meet the output power demand and the response time demand and all battery clusters are required to participate in power consumption, confirms all battery clusters in the energy storage system as the target battery clusters, thereby generating the first power consumption participation instruction.

[0038] Thus, if it is determined that all battery clusters are required to participate in power consumption to meet the power consumption end's demand, all battery clusters are confirmed as the target battery clusters.

[0039] In some embodiments, controlling the target battery cluster to connect to the power consumption end to respond to the power consumption request in response to the received power consumption participation instruction generated by the target battery cluster for power consumption confirmed by the power consumption end according to the output power demand, response time demand, and the status information includes:

[0040] In response to the received second power consumption participation instruction sent by the power consumption end, controlling the target battery cluster to connect to the power consumption end to respond to the power consumption request, where the power consumption end, when confirming according to the status information that the energy storage system can meet the output power demand and the response time demand and all battery clusters are not required to participate in power consumption, confirms the target battery clusters according to the health degree of the battery clusters from high to low, thereby generating the second power consumption participation instruction.

[0041] Thus, if the power consumption end's demand can be met without all battery clusters participating, then the target battery clusters are confirmed according to the health degree of the battery clusters from high to low. In the case of meeting the power consumption end's demand, the target battery clusters with better health degrees are preferentially selected, thereby improving the overall service life of the energy storage system.

[0042] In some embodiments, controlling the target battery cluster to connect to the power consumption end to respond to the power consumption request in response to the received power consumption participation instruction generated by the target battery cluster for power consumption confirmed by the power consumption end according to the output power demand, response time demand, and the status information includes:

[0043] In response to the third power consumption participation instruction sent by the power consumption end, control all battery clusters to connect to the power consumption end to respond to the power consumption request, where, when the power consumption end confirms that the energy storage system cannot meet the output power demand and / or the response time demand according to the status information, confirm all battery clusters in the energy storage system as the target battery clusters, thereby generating the third power consumption participation instruction.

[0044] Thus, if the current energy storage system cannot meet the demand of the power consumption end, all battery clusters are determined as the target battery clusters, so as to try to meet the demand of the power consumption end.

[0045] The present application further provides a control device for an energy storage system, and the control device includes:

[0046] An acquisition module, configured to respond to a power consumption request sent by a power consumption end to which the energy storage system is connected, and acquire status information of each battery cluster in the energy storage system;

[0047] A communication module, configured to report the status information to the power consumption end;

[0048] A control module, configured to respond to a power consumption participation instruction sent by the power consumption end, and control the target battery clusters to connect to the power consumption end to respond to the power consumption request, where the power consumption end determines the target battery clusters participating in power consumption according to the status information and the power consumption demand, thereby generating the power consumption participation instruction.

[0049] The present application further provides an electronic device, the electronic device includes a processor and a memory, and a computer program is stored in the memory, and when the computer program is executed by the processor, the above control method is implemented.

[0050] The present application further provides a computer-readable storage medium, and the computer-readable storage medium stores a computer program, and when the computer program is executed by one or more processors, the above control method is implemented.

[0051] Additional aspects and advantages of the embodiments of the present application will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the embodiments of the present application. Description of the Drawings

[0052] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0053] Figure 1 is a schematic structural diagram of an energy storage system according to some embodiments of the present application;

[0054] Figure 2It is a schematic flowchart of the control method according to some embodiments of the present application;

[0055] Figure 3 It is a schematic flowchart of the control method according to some embodiments of the present application;

[0056] Figure 4 It is a schematic flowchart of the control method according to some embodiments of the present application;

[0057] Figure 5 It is a schematic diagram of the modules of the control device according to some embodiments of the present application;

[0058] Figure 6 It is a schematic diagram of the connection state of the computer-readable storage medium and the processor according to some embodiments of the present application. Detailed Embodiments

[0059] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0061] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality" means more than two unless otherwise specifically defined.

[0062] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appears at various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0063] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, both A and B exist simultaneously, and B exists alone. Additionally, in this article, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0064] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0065] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "linkage", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0066] With the continuous increase in power demand, renewable energy sources such as solar energy and wind energy will become the main energy sources. However, wind power and solar power generation have the characteristics of intermittency, volatility, and uncontrollability. Large-scale integration into the power consumption side will cause a serious impact on the safe and stable operation of the power consumption side. Applying an energy storage system to the power transmission and distribution field to participate in voltage support, frequency modulation, peak shaving, rapid output regulation of new energy, etc. can effectively alleviate a series of problems brought about by the grid connection of new energy, and realize the sustainability, stability, safety, and controllability of new energy power generation, which is of great significance for improving the flexibility of the power system and promoting the consumption and application of renewable energy.

[0067] With the rapid development of new energy technology, the energy storage system has become one of the more important research directions in the new energy field. The current energy storage system usually includes multiple parallel-connected battery clusters, and each battery cluster is composed of multiple series-connected batteries. However, the applicant's research found that currently, in an energy storage system, batteries of a single material and health state are usually used, and the mixing of batteries of different materials and different health states is not supported. The production, manufacturing, and design availability of the energy storage system are poor, and the cost is high. In such an energy storage system, due to the parallel connection of battery clusters, the available capacity of the battery clusters on the parallel link can only reach the capacity of the weakest battery cluster, resulting in parallel capacity mismatch and low battery utilization rate. At the same time, the bias current problem caused by the parallel connection of battery clusters exacerbates battery aging and shortens the battery service life. And the series connection of batteries within the battery cluster causes the available capacity of the batteries on the series link to only reach the capacity of the weakest battery, resulting in series capacity mismatch and the barrel effect, further reducing the battery utilization rate.

[0068] Based on this, after in-depth research, the applicant has designed an architecture of an energy storage system, in which the mixing of different battery clusters classified based on charge-discharge rate and charge-discharge cycle times can be supported, and the batteries in each battery cluster can be mixed in terms of materials and / or state of health. This can improve the production, manufacturing and design availability of the energy storage system. Battery cells of different material types and health levels can be mixed after being manufactured, effectively reducing the cost of the energy storage system. During power consumption, according to the self-states of each battery cluster in the energy storage system and the requirements of the power consumption end, a target battery cluster is selected to be connected to the power consumption end to respond to the requirements of the power consumption end, so that the battery cluster can be utilized under certain circumstances, effectively improving the safety of the energy storage system and extending its service life.

[0069] The energy storage system disclosed in the embodiments of the present application can be applied to energy storage devices such as hydroelectric power plants, thermal power plants, wind power plants and solar power plants, and is also widely applied to electric transportation means such as electric bicycles, electric motorcycles and electric vehicles, as well as multiple fields such as military equipment and aerospace.

[0070] Please refer to Figure 1 , the present application provides an energy storage system 1000. The energy storage system 1000 includes at least two battery clusters 100 of different types. Among them, the battery cluster 100 is formed by connecting a plurality of batteries. For example, it can be formed by connecting multiple batteries in series. In the present application, the different types of the battery cluster 100 refer to different charge-discharge rates and charge-discharge cycle times of the battery cluster 100. For example, it includes at least one battery cluster 100 with a higher charge-discharge rate but a lower charge-discharge cycle time, such as a charge-discharge rate of 5C and a charge-discharge cycle time of 10,000 cycles, and a battery cluster 100 with a lower charge-discharge rate but a higher charge-discharge cycle time, such as a charge-discharge rate of 1C and a charge-discharge cycle time of 20,000 cycles. That is, generally speaking, a power-type battery cluster and an energy-type battery cluster. The power-type battery cluster is formed by electrically connecting power-type batteries, and the energy-type battery cluster is formed by electrically connecting energy-type batteries.

[0071] The power consumption end 2000 can include a power grid or a load.

[0072] The materials and / or health conditions of the batteries in each battery cluster 100 can be the same or different. For example, the materials of the batteries can be ternary lithium batteries (NCM), lithium iron phosphate (LFP), etc. The health condition of the batteries can be divided according to the capacity of the batteries of different materials after leaving the factory. For example, for NCM batteries, it is BOL (Beginning of Life) at the time of leaving the factory. When the battery capacity decays to less than 80% of BOL, it is EOL (End of Life), and the degree in between is MOL (Middle of Life). Another example is that for LFP batteries, it is BOL (Beginning of Life) at the time of leaving the factory. When the battery capacity decays to less than 70% of BOL, it is EOL (End of Life), and the degree in between is MOL (Middle of Life). In this application, for the same type of battery cluster, the batteries therein can be mixed with different materials and / or different health conditions. For example, for an energy-type battery cluster, it can be a mixture of LFP batteries and NCM batteries. It can be a mixture of BOL and MOL batteries of the same material. It can also be a mixture of BOL and MOL batteries of LFP and BOL and MOL batteries of NCM, which is not limited herein. The battery cluster based on the mixture of power-type and energy-type in this application can be applied to different packaging levels of the battery. For example, it can be composed of battery clusters in different packaging forms such as battery cells, battery modules, electrical boxes, electrical cabinets, containers, etc.

[0073] Each battery cluster 100 is respectively connected to a management unit 110. The management unit 110 can be a Battery Management System (BMS) unit. Each battery cluster 100 and the corresponding management unit 110 can be electrically connected or communicatively connected. The management unit 110 can be used to obtain the status information of the corresponding battery cluster 100 to manage the battery cluster 100. Among them, the status information can include the State of Charge (SOC), State of Health (SOH), State of Power (SOP), State of Energy (SOE), etc. of the battery cluster.

[0074] At the same time, each battery cluster 100 is connected to the power consumption end 2000 through a power supply 120. The power unit 120 is a unit device for power conversion connected between the battery cluster and the power consumption end. For example, it can be a Power Conversion System (PCS). The power unit 120 is a key device between the energy storage system 1000 and the power consumption end 2000, used to control the charging and power consumption processes of the battery cluster and perform AC / DC conversion. The power unit can be composed of an AC / DC bidirectional converter, a control unit, etc.

[0075] The basic framework of the energy storage system 1000 of the present application is described above. By adopting this framework, the energy storage system 1000 can support the mixed use of different battery clusters 100 classified based on the charge-discharge rate and the number of charge-discharge cycles, and the materials and / or health states adopted by each battery cluster 100 can also be mixed. It can improve the production and manufacturing availability of the energy storage system 1000. After battery monomers of different material types and health levels are manufactured, they can be mixed, effectively reducing the cost of the energy storage system.

[0076] The power consumption demand includes charging the energy storage system 1000 and requesting the energy storage system 1000 to discharge. Taking the discharge demand as an example, during the actual power consumption process, when the self-generation capacity of the power grid is insufficient and there is a power demand, some or all of the battery clusters 100 in the energy storage system 1000 need to be connected to the power grid. In the present application, relevant control strategies are provided, which cooperate with the management unit 110 and the power unit 120 to connect the corresponding battery cluster 100 to the power consumption end 2000 according to the power consumption demand.

[0077] Specifically, the power consumption end 2000 further includes a monitoring unit 210, and the monitoring unit 210 is the capacity scheduling unit of the power consumption end 2000. It can send a power consumption request to the function unit 120 according to the demand of the power consumption end 2000.

[0078] After receiving the power consumption request sent by the monitoring unit 210 of the power consumption end 2000, the power unit 120 forwards it to the management unit 110. The management unit 110 responds to the power consumption request, obtains the status information of each battery cluster 100, and reports the obtained status information to the power unit 120, and then the power unit 120 reports it to the monitoring unit 210. The monitoring unit 210 confirms the target battery cluster participating in the power consumption according to the reported status information and the power consumption demand of the power consumption end 2000. After confirmation, the power consumption participation instruction is sent to the power unit 120 corresponding to the target battery cluster. The power unit 120 forwards the power consumption participation instruction to the corresponding management unit 110, and the management unit 110 connects the target battery cluster to the power consumption end 2000, thereby responding to the demand of the power consumption end 2000. Thus, during the power consumption process, according to the self-status of each battery cluster 100 in the energy storage system 1000 and the demand of the power consumption end 2000, the target battery cluster is connected to the power consumption end 2000 through the power unit 110 and the management unit 120 to respond to the demand of the power consumption end 2000. While meeting the demand of the power consumption end 2000, it can form an orderly scheduling of the use of different battery clusters 100, and the overall energy storage system 1000 maintains a good battery health state, effectively improving the safety of the energy storage system 1000 and extending its service life.

[0079] In summary, based on the provided energy storage system architecture in this application, the energy storage system 1000 can support the mixed use of different battery clusters classified based on charge-discharge rate and charge-discharge cycle times, and the materials and / or health states adopted by each battery cluster 100 can also be mixed. This can improve the production and manufacturing availability of the energy storage system 1000. Battery cells of different material types and health levels can be mixed after being manufactured, effectively reducing the cost of the energy storage system 1000. During power consumption, according to the self-states of each battery cluster 100 in the energy storage system 1000 and the demands of the power consumption end 2000, the target battery cluster is connected to the power consumption end through the power unit 120 and the management unit 110 to respond to the demands of the power consumption end 2000, which can effectively improve the safety of the energy storage system 1000 and extend its service life.

[0080] In some embodiments, each battery cluster 100 is connected to the corresponding power unit 120 through a switch unit 130. The management unit 110 of the target battery cluster controls the opening and closing of the switch unit 130 according to the power consumption participation instruction to connect the target battery cluster to the power unit 120, thereby connecting to the power consumption end 2000 to respond to the power consumption request.

[0081] Specifically, the switch unit 130 can be devices such as a relay, MOS transistor, IGBT, SIC-MOSFET, etc., and is arranged between the battery cluster 100 and the corresponding power unit 120. The switch unit 130 can be driven and controlled by the management unit 120 to open and close, thereby determining whether to connect the battery cluster 100 to the corresponding power unit 120. The setting of the switch unit 130 enables each battery cluster 100 to be independently controllable, and the corresponding battery cluster 100 can be selectively connected to the power consumption end 2000 according to requirements. When a certain battery cluster 100 is determined as the target battery cluster, the management unit 110 controls the switch unit 130 to close to connect the battery cluster 100 to the corresponding power unit 120, and then connect to the power consumption end 2000 to meet the demands of the power consumption end.

[0082] In this way, each battery cluster 100 is independently controllable, and the management unit 110 controls the battery cluster corresponding to the target battery cluster to connect to the power consumption end 2000 according to the power consumption participation instruction to meet the demands of the power consumption end 2000.

[0083] In some embodiments, the management unit 110 is used to respond to the power consumption request, collect the current parameters of each battery cluster 100, and determine the status information of each battery cluster 100 according to the current parameters. The status information includes the charge-discharge capacity of the battery cluster 100 and the battery cluster status description information.

[0084] Specifically, the monitoring unit 210 sends the power consumption request of the power consumption end 2000 to the power unit 120. The power unit 120 forwards the power consumption request to each management unit 110. Each management unit 110 collects the current parameters of the corresponding battery cluster 100. The current parameters may include the temperature, voltage, etc. of the battery, and the state information of the battery cluster 100 can be determined according to the current parameters. Among them, the state information includes the charge and discharge capacity and the battery cluster state description information. The charge and discharge capacity includes, for example, the current capacity, power consumption rate, etc. of the battery cluster 100. The state information includes the state of charge (SOC), state of health (SOH), state of power (SOP), state of energy (SOE), etc. of the battery cluster. The management unit 110 reports this information to the power unit 120, and further reported by the power unit 120 to the monitoring unit 210 for the monitoring unit 210 to make a decision on participating in power consumption according to the state information of the energy storage system 1000.

[0085] In this way, according to the power consumption request of the power consumption end, the management unit collects the current parameters of its own battery cluster, so as to determine the charge and discharge capacity of each battery cluster and the battery cluster state description information, providing data support for determining the target battery cluster participating in power consumption.

[0086] In some embodiments, the monitoring unit 210 confirms the target battery cluster participating in power consumption according to the state information, output power requirement and response time requirement, and sends a power consumption participation instruction to the management unit 110 of the target battery cluster via the power unit 120 of the target battery cluster.

[0087] Specifically, the output power P out is the power that the power consumption end 2000 determines that the energy storage system 1000 needs to output or provide according to the load demand in the power consumption end and the current capacity of the power consumption end. The response time is the response speed requirement for the energy storage system 1000 to participate in the frequency modulation of the power consumption end. The monitoring unit 210 determines the control strategy for the battery clusters 100 in the energy storage system 1000 according to the output power, response time requirement and the state information of each battery cluster 100 reported by the power unit 120, that is, determines the target battery cluster participating in power consumption, and sends a power consumption participation instruction to the power unit 120 of the target battery cluster. Further, it is forwarded by the power unit 120 to the corresponding management unit 110, and the management unit 110 controls the switch unit 130 to close, connecting the target battery cluster to the power consumption end 2000 to meet the requirements of the power consumption end 2000.

[0088] In this way, the monitoring unit at the power consumption end can determine the target battery clusters participating in power consumption based on the output power, response time, and the charge and discharge capabilities and status description information of each battery cluster reported by the power unit, and send a power consumption participation instruction to the management unit corresponding to the target battery clusters, so that the management unit can connect the target battery clusters to the power consumption end to respond to the requirements of the power consumption end.

[0089] In some embodiments, when the monitoring unit 210 confirms according to the status information that the energy storage system 1000 can meet the output power requirement and response time requirement, the target battery clusters participating in power consumption are confirmed.

[0090] Specifically, in the process of determining the control strategy of the energy storage system 1000, it is first confirmed whether the energy storage system 1000 can meet the power and response time requirements of the power consumption end 2000. Being able to meet means that some or all of the battery clusters 100 in the energy storage system 1000 participate in power consumption and can simultaneously meet the requirements of the power consumption end 2000 for output power and response time. Under the condition of meeting the requirements of the power consumption end 2000, the battery clusters 100 participating in power consumption are the target battery clusters. When it is confirmed that the energy storage system 1000 can meet the requirements of the power consumption end 2000, the target battery clusters participating in power consumption will be confirmed according to a predetermined strategy. The predetermined strategy is also the criterion or principle for selecting the target battery clusters. For example, it is considered to preferentially select the battery clusters with better health status as the target battery clusters, etc.

[0091] In this way, the monitoring unit 210 first confirms whether the energy storage system 1000 can meet the requirements of the power consumption end 2000 according to the status information. If it can meet the requirements, the target battery clusters participating in power consumption are then confirmed.

[0092] In some embodiments, when the monitoring unit 210 confirms according to the status information that the energy storage system 1000 can meet the output power requirement and response time requirement, and all the battery clusters 100 need to participate in power consumption, all the battery clusters 100 in the energy storage system 100 are confirmed as the target battery clusters.

[0093] Specifically, this embodiment is the first sub-case when the monitoring unit 210 confirms that the energy storage system 1000 can meet the requirements of the power consumption end 2000 for output power and response time, that is, all the battery clusters 100 need to participate in power consumption to meet the requirements of the power consumption end 2000. In this case, the monitoring unit 210 confirms that all the battery clusters 100 are the target battery clusters. The monitoring unit 210 sends a power consumption participation instruction to the power unit 120 of each battery cluster, and further forwards it to the corresponding management unit 110 by the power unit 120. The management unit 110 controls the switch unit 130 of each battery cluster 100 to close, connects all the battery clusters 100 to the power consumption end 2000, and meets the requirements of the power consumption end 2000.

[0094] Thus, if it is determined that all battery clusters need to participate in power consumption to meet the power consumption demand of the power consumption end, all battery clusters are identified as target battery clusters.

[0095] In some embodiments, when the monitoring unit 210 confirms according to the status information that the energy storage system 1000 can meet the output power demand and the response time demand, and does not require all battery clusters 100 to participate in power consumption, the target battery clusters are identified according to the health degree of the battery clusters 100 from high to low.

[0096] Specifically, this embodiment is the second sub-case when the monitoring unit 210 confirms that the energy storage system 1000 can meet the power consumption end 2000's demands for output power and response time, that is, the power consumption end 2000's demands can be met without all battery clusters 100 participating in power consumption. In this case, on the premise of meeting the power consumption end's demands, the monitoring unit 210 determines the target battery clusters according to the health degree of each battery cluster 100 in the energy storage system 1000. For example, the target battery clusters can be identified according to the health degree of each battery cluster 100 from high to low. That is, battery clusters 100 with better health degrees are preferentially selected to participate in power consumption. For example, battery clusters 100 with a health degree of BOL in the energy storage system 1000 can be preferentially selected. If the battery clusters 100 with a health degree of BOL are not sufficient to meet the power consumption end's demands, then battery clusters 100 with a health degree of MOL can be selected. Proceeding in this way, finally, battery clusters 100 with a health degree of EOL are selected. In this way, when the demands of the power consumption end can be met with the participation of some battery clusters, it can always be ensured that battery clusters with better health degrees participate in power consumption first, thereby improving the overall service life of the energy storage system 100.

[0097] The monitoring unit 210 sends a power consumption participation instruction to the power unit 120 of the target battery cluster, and further forwards it to the corresponding management unit 110 by the power unit 120. The management unit 110 controls the switch unit 130 of the target battery cluster to close, connecting the target battery cluster to the power consumption end to meet the demands of the power consumption end 2000.

[0098] Thus, if the power consumption end's demands can be met without all battery clusters participating, then the target battery clusters are identified according to the health degree of the battery clusters 100 from high to low. Under the condition of meeting the power consumption end's demands, target battery clusters with better health degrees are preferentially selected, thereby improving the overall service life of the energy storage system.

[0099] In some embodiments, when the monitoring unit 210 confirms according to the status information that the energy storage system 1000 cannot meet the output power demand and / or the response time demand, all battery clusters 100 in the energy storage system 1000 are identified as target battery clusters.

[0100] Specifically, when the monitoring unit 210 confirms that the energy storage system 1000 cannot meet the requirements of the power consumption end 2000 for output power and response time, for example, it cannot meet the requirements for output power and response time simultaneously, all battery clusters 100 need to participate in power consumption to try to meet the requirements of the power consumption end 2000. For example, it can separately meet the requirement of output power or response time. In this case, the monitoring unit 210 confirms that all battery clusters 100 are target battery clusters. The monitoring unit 210 sends a power consumption participation instruction to the power unit 120 of each battery cluster, and further forwards it to the corresponding management unit 110 by the power unit 120. The management unit 110 controls the switch unit 130 of each battery cluster 100 to close, and connects all battery clusters to the power consumption end to try to meet the requirements of the power consumption end 2000.

[0101] Thus, if the current energy storage system cannot meet the requirements of the power consumption end, all battery clusters are determined as target battery clusters to try to meet the requirements of the power consumption end.

[0102] Based on the same inventive concept, the present application also provides a control method based on the above-mentioned energy storage system 1000. The implementation solution for solving the problem provided by this control method is similar to the implementation solution described in the above method. Therefore, the specific limitations in one or more control method embodiments provided below can refer to the limitations on the energy storage system 1000 in the above text, and will not be elaborated here.

[0103] Please refer to Figure 2 , the present application also provides a control method based on the above-mentioned energy storage system 1000. The control method includes the following steps:

[0104] 01: In response to a power consumption request sent by the power consumption end to which the energy storage system is connected, obtain the status information of each battery cluster in the energy storage system;

[0105] 02: Report the status information to the power consumption end;

[0106] 03: In response to the received power consumption participation instruction sent by the power consumption end, control the target battery cluster to access the power consumption end to respond to the power consumption request. Among them, the power consumption end determines the target battery cluster participating in power consumption according to the status information and power consumption requirements, and thus generates a power consumption participation instruction.

[0107] Thus, based on the provided energy storage system architecture in this application, the energy storage system can support the mixed use of different battery clusters classified based on charge-discharge rate and charge-discharge cycle times, and the materials and / or health states adopted by each battery cluster can also be mixed. This can improve the production and manufacturing availability of the energy storage system. After battery monomers of different material types and health levels are manufactured, they can be mixed, effectively reducing the cost of the energy storage system. During power consumption, according to the self-states of each battery cluster in the energy storage system and the requirements of the power consumption end, through the power unit and the management unit, the target battery cluster is connected to the power consumption end to respond to the requirements of the power consumption end, which can effectively improve the safety of the energy storage system and extend its service life.

[0108] Please refer to Figure 3 , in some embodiments, step 01 includes:

[0109] 010: Collect the current parameters of each battery cluster;

[0110] 011: Determine the status information of each battery cluster according to the current parameters, where the status information includes the charge-discharge capacity of the battery cluster and the battery cluster status description information.

[0111] Thus, according to the power consumption request of the power consumption end, the current parameters of each battery cluster are collected, so as to determine the charge-discharge capacity of each battery cluster and the battery cluster status description information, providing data support for determining the target battery cluster participating in power consumption.

[0112] Please refer to Figure 4 , in some embodiments, step 03 includes:

[0113] 030: In response to the power consumption participation instruction generated by the target battery cluster participating in power consumption confirmed by the power consumption end according to the output power demand, response time demand, and status information, control the target battery cluster to access the power consumption end to respond to the power consumption request.

[0114] Thus, the power consumption end can determine the target battery cluster participating in power consumption according to the output power, response time, and the reported charge-discharge capacity and status description information of each battery cluster, and issue the power consumption participation instruction, so as to connect the target battery cluster to the power consumption end to respond to the requirements of the power consumption end.

[0115] Please refer to Figure 4 , in some embodiments, step 030 includes:

[0116] 0300: In response to the first power consumption participation instruction sent by the power consumption end, control all battery clusters to connect to the power consumption end to respond to the power consumption request. Among them, when the power consumption end confirms according to the status information that the energy storage system can meet the output power demand and response time demand, and all battery clusters are required to participate in power consumption, all battery clusters in the energy storage system are confirmed as target battery clusters, thereby generating the first power consumption participation instruction.

[0117] Thus, if it is determined that all battery clusters need to participate in power consumption to meet the power consumption end's demand, all battery clusters are confirmed as target battery clusters.

[0118] Please refer to Figure 4 , in some embodiments, step 030 includes:

[0119] 0301: In response to the second power consumption participation instruction sent by the power consumption end, control the target battery clusters to connect to the power consumption end to respond to the power consumption request. Among them, when the power consumption end confirms according to the status information that the energy storage system can meet the output power demand and response time demand, and all battery clusters are not required to participate in power consumption, the target battery clusters are confirmed from the highest to the lowest health level of the battery clusters, thereby generating the second power consumption participation instruction.

[0120] Thus, if the power consumption end's demand can be met without all battery clusters participating, then the target battery clusters are confirmed from the highest to the lowest health level of the battery clusters. When the power consumption end's demand is met, target battery clusters with better health levels are preferentially selected, thereby improving the overall service life of the energy storage system.

[0121] Please refer to Figure 4 , in some embodiments, step 030 includes:

[0122] 0302: In response to the third power consumption participation instruction sent by the power consumption end, control all battery clusters to connect to the power consumption end to respond to the power consumption request. Among them, when the power consumption end confirms according to the status information that the energy storage system cannot meet the output power demand and / or response time demand, all battery clusters in the energy storage system are confirmed as the target battery clusters, thereby generating the third power consumption participation instruction.

[0123] Thus, if the current energy storage system cannot meet the power consumption end's demand, then all battery clusters are determined as target battery clusters, thereby trying to meet the power consumption end's demand as much as possible.

[0124] Please refer to Figure 5, the present application also provides a control device 300 for an energy storage system. The control device 300 includes: an acquisition module 310, a communication module 320, and a control module 330. Among them, the acquisition module 310 is configured to respond to a power consumption request sent by a power consumption end to which the energy storage system is connected, and acquire the status information of each battery cluster in the energy storage system. The communication module 320 is configured to report the status information to the power consumption end. The control module 330 is configured to respond to a power consumption participation instruction sent by the received power consumption end, and control the target battery cluster to be connected to the power consumption end to respond to the power consumption request. Among them, the power consumption end determines the target battery cluster participating in power consumption according to the status information and the power consumption demand, so as to generate a power consumption participation instruction.

[0125] Each module in the control device 300 can be implemented in whole or in part by software, hardware, and their combination. The above-mentioned modules can be embedded in the processor in the computer device in hardware form or independent of it, or stored in the memory in the computer device in software form, so that the processor can call and execute the operations corresponding to the above-mentioned modules.

[0126] For the provided control device 300, its implementation principle and technical effects are similar to those of the above method embodiment, and will not be elaborated here.

[0127] Please refer to Figure 6 , the present application also provides a computer-readable storage medium 400 containing a computer program 401. When the computer program 401 is executed by one or more processors 500, one or more processors 500 are caused to execute the control method of any of the above embodiments.

[0128] For the provided computer-readable storage medium, its implementation principle and technical effects are similar to those of the above method embodiment, and will not be elaborated here.

[0129] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., without limitation.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage system, characterized in that, Including: At least two battery clusters of different types, each of the battery clusters is respectively connected to a management unit and is respectively connected to an electricity-consuming end through a power unit. The materials and / or health conditions of each of the battery clusters are the same or different, and the charge-discharge rates and charge-discharge cycle numbers of the at least two battery clusters of different types are different, wherein, The power unit is used for receiving an electricity consumption request sent by a monitoring unit of the electricity-consuming end; The management unit is used for responding to the electricity consumption request, acquiring the status information of each of the battery clusters, and reporting the status information to the monitoring unit via the power unit; The monitoring unit confirms target battery clusters participating in electricity consumption according to the status information and electricity consumption requirements, and sends an electricity consumption participation instruction to the management unit of the target battery clusters via the power units of the target battery clusters; The management unit of the target battery clusters controls the target battery clusters to be connected to the power unit so as to be connected to the electricity-consuming end to respond to the electricity consumption request according to the electricity consumption participation instruction.

2. The energy storage system according to claim 1, characterized in that Each of the battery clusters is connected to the corresponding power unit through a switching unit, and the management unit of the target battery clusters controls the opening and closing of the switching unit according to the electricity consumption participation instruction to connect the target battery clusters to the power unit so as to be connected to the electricity-consuming end to respond to the electricity consumption request.

3. The energy storage system according to claim 1, characterized in that, The management unit is used for responding to the electricity consumption request, collecting the current parameters of each of the battery clusters, and determining the status information of each of the battery clusters according to the current parameters. The status information includes the charge-discharge capacity of the battery clusters and battery cluster status description information.

4. The energy storage system according to claim 1, wherein, The monitoring unit confirms target battery clusters participating in electricity consumption according to the status information, output power requirements and response time requirements, and sends an electricity consumption participation instruction to the management unit of the target battery clusters via the power units of the target battery clusters.

5. The energy storage system according to claim 4, characterized in that In the case that the monitoring unit confirms that the energy storage system can meet the output power requirements and the response time requirements according to the status information, confirm the target battery clusters participating in electricity consumption.

6. The energy storage system according to claim 5, wherein In the case that the monitoring unit confirms that the energy storage system can meet the output power requirements and the response time requirements according to the status information and all battery clusters are required to participate in electricity consumption, confirm all the battery clusters in the energy storage system as the target battery clusters.

7. The energy storage system according to claim 5, wherein In the case that the monitoring unit confirms that the energy storage system can meet the output power requirements and the response time requirements according to the status information and not all battery clusters are required to participate in electricity consumption, confirm the target battery clusters according to the health conditions of the battery clusters from high to low.

8. The energy storage system according to claim 4, characterized in that, In the case that the monitoring unit confirms that the energy storage system cannot meet the output power requirements and / or the response time requirements according to the status information, confirm all the battery clusters in the energy storage system as the target battery clusters.

9. A control method, based on the energy storage system according to any one of claims 1-8, characterized in that, The control method includes: In response to an electricity consumption request sent by the electricity-consuming end to which the energy storage system is connected, acquire the status information of each battery cluster in the energy storage system; Report the status information to the electricity-consuming end; In response to the power consumption participation instruction sent by the power consumption end, control the target battery cluster to access the power consumption end to respond to the power consumption request, where the power consumption end determines the target battery cluster participating in power consumption according to the status information and power consumption demand, and thus generates the power consumption participation instruction.

10. The control method according to claim 9, wherein In response to the power consumption request sent by the power consumption end accessing the energy storage system, obtain the status information of each battery cluster in the energy storage system, including: Collect the current parameters of each battery cluster; Determine the status information of each battery cluster according to the current parameters, where the status information includes the charge and discharge capacity of the battery cluster and the battery cluster status description information.

11. The control method according to claim 9, wherein In response to the power consumption participation instruction sent by the power consumption end, control the target battery cluster to access the power consumption end to respond to the power consumption request, including: In response to the power consumption participation instruction generated by the power consumption end according to the output power demand, response time demand, and the status information to confirm the target battery cluster participating in power consumption, control the target battery cluster to access the power consumption end to respond to the power consumption request.

12. The control method according to claim 11, wherein In response to the power consumption participation instruction generated by the power consumption end according to the output power demand, response time demand, and the status information to confirm the target battery cluster participating in power consumption, control the target battery cluster to access the power consumption end to respond to the power consumption request, including: In response to the first power consumption participation instruction sent by the power consumption end, control all battery clusters to access the power consumption end to respond to the power consumption request, where the power consumption end, when confirming according to the status information that the energy storage system can meet the output power demand and the response time demand, and all battery clusters are required to participate in power consumption, confirms all battery clusters in the energy storage system as the target battery clusters, and thus generates the first power consumption participation instruction.

13. The control method according to claim 11, characterized in that, In response to the power consumption participation instruction generated by the power consumption end according to the output power demand, response time demand, and the status information to confirm the target battery cluster participating in power consumption, control the target battery cluster to access the power consumption end to respond to the power consumption request, including: In response to the second power consumption participation instruction sent by the power consumption end, control the target battery cluster to access the power consumption end to respond to the power consumption request, where the power consumption end, when confirming according to the status information that the energy storage system can meet the output power demand and the response time demand, and all battery clusters are not required to participate in power consumption, confirms the target battery clusters according to the health degree of the battery clusters from high to low, and thus generates the second power consumption participation instruction.

14. The control method according to claim 11, characterized in that, In response to the power consumption participation instruction generated by the power consumption end according to the output power demand, response time demand, and the status information to confirm the target battery cluster participating in power consumption, control the target battery cluster to access the power consumption end to respond to the power consumption request, including: In response to the third power consumption participation instruction sent by the power consumption end, control all battery clusters to connect to the power consumption end to respond to the power consumption request, where the power consumption end determines all battery clusters in the energy storage system as the target battery clusters when it is confirmed according to the status information that the energy storage system cannot meet the output power demand and / or the response time demand, so as to generate the third power consumption participation instruction.

15. A control device for an energy storage system, characterized in that, The control device includes: An acquisition module, configured to acquire the status information of each battery cluster in the energy storage system in response to a power consumption request sent by a power consumption end to which the energy storage system is connected; A communication module, configured to report the status information to the power consumption end; A control module, configured to control the target battery clusters to connect to the power consumption end to respond to the power consumption request in response to the received power consumption participation instruction sent by the power consumption end, where the power consumption end determines the target battery clusters participating in power consumption according to the status information and the power consumption demand, so as to generate the power consumption participation instruction.

16. An electronic device, characterized in that, The electronic device includes a processor and a memory, and a computer program is stored in the memory. When the computer program is executed by the processor, the control method according to any one of claims 9-14 is implemented.

17. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and when the computer program is executed by one or more processors, the control method according to any one of claims 9-14 is implemented.

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