Battery mixed use system, control method and control device thereof, and storage medium

Abstract

The invention discloses a battery mixed use system, a control method and a control device thereof and a storage medium, the battery mixed use system comprises N battery clusters, the N battery clusters are connected in parallel, N is an integer greater than 1, and the method comprises the following steps: when an electric energy exchange demand sent by an external electric energy exchange end is received, obtaining the electric energy exchange capability of the N battery clusters; determining a target battery cluster from the N battery clusters according to the electric energy exchange demand and the electric energy exchange capability of the N battery clusters; and establishing electric connection between the target battery cluster and an external electric energy exchange end so as to perform electric energy exchange with the external electric energy exchange end.

Description

Battery mixing system, control method, control device and storage medium thereof Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery mixing system and a control method, a control device, and a storage medium thereof. Background Art

[0002] For economic, energy, and environmental reasons, battery clusters of different brands and models, as well as new and old battery clusters, are sometimes mixed and used. Due to the varying internal resistances of different battery clusters, current bias occurs during charging and discharging. For example, a high-capacity battery cluster under the influence of lower-capacity batteries cannot function at full capacity and can damage the batteries, making it uneconomical to use. In particular, the uncontrollable current levels can lead to extremely poor safety, potentially resulting in serious safety incidents such as explosions, bulging, and leakage.

[0003] Moreover, due to limitations in the material system and manufacturing process, it is difficult for batteries to achieve both long life and high-rate charge and discharge performance, especially in the field of large numbers of battery clusters connected in series and parallel. Therefore, the entire system often uses a single long-life or a single high-rate charge and discharge battery, resulting in a waste of resources.

[0004] Summary of the Invention

[0005] The present disclosure aims to at least partially address one of the technical issues in the related art. To this end, the present disclosure aims to provide a battery mixing system and its control method, control device, and storage medium, so as to significantly improve the production, manufacturing, and design availability of the battery mixing system by mixing different types of batteries, and to enhance the service life and safety of the battery mixing system.

[0006] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present disclosure proposes a control method for a battery mixing system, wherein the battery mixing system includes N battery clusters, and the N battery clusters are connected in parallel, where N is an integer greater than 1. The method includes: upon receiving an energy exchange requirement sent by an external energy exchange end, obtaining the energy exchange capabilities of the N battery clusters; determining a target battery cluster from the N battery clusters based on the energy exchange requirement and the energy exchange capabilities of the N battery clusters; and establishing an electrical connection between the target battery cluster and the external energy exchange end to exchange energy with the external energy exchange end.

[0007] In addition, the control method of the battery hybrid system of the above embodiment of the present disclosure may also have the following additional technical features:

[0008] According to one embodiment of the present disclosure, determining a target battery cluster from the N battery clusters based on the power exchange demand and the power exchange capability of each battery cluster includes: judging whether the N battery clusters meet the power exchange demand based on the power exchange capabilities of the N battery clusters; if not, determining that the N battery clusters are all the target battery clusters; if so, selecting all or part of the battery clusters from the N battery clusters as the target battery cluster based on the power exchange demand and the power exchange capability of the N battery clusters.

[0009] According to one embodiment of the present disclosure, the electric energy exchange requirement includes a first electric energy exchange power and a first electric energy exchange duration, and the electric energy exchange capability includes a second electric energy exchange power and a second electric energy exchange duration. Judging whether the N battery clusters meet the electric energy exchange requirement based on the electric energy exchange capabilities of the N battery clusters includes: calculating the product of the second electric energy exchange power and the second electric energy exchange duration of the N battery clusters to obtain N first products, and calculating the sum of the N first products; calculating the product of the first electric energy exchange power and the first electric energy exchange duration to obtain a second product, and calculating the difference between the sum and the second product; if the difference is greater than or equal to a first preset value, determining that the N battery clusters meet the electric energy exchange requirement, wherein the first preset value is a positive value; if the difference is less than the first preset value, determining that the N battery clusters do not meet the electric energy exchange requirement.

[0010] According to an embodiment of the present disclosure, when N battery clusters meet the power exchange requirement, the sum of the first products corresponding to all target battery clusters is greater than the second product.

[0011] According to one embodiment of the present disclosure, establishing the electrical connection between the target battery cluster and the external power exchange end includes: determining the start time and end time of the electrical connection between each target battery cluster and the external power exchange end; and establishing the electrical connection between the corresponding target battery cluster and the external power exchange end according to each start time and end time.

[0012] According to one embodiment of the present disclosure, when N of the battery clusters meet the electric energy exchange requirement, the difference between the first start time and the last end time is equal to the first electric energy exchange duration, and at each moment between the first start time and the last end time, the total electric energy exchange power of the electrically connected target battery cluster is equal to the first electric energy exchange power; when N of the battery clusters do not meet the electric energy exchange power, the difference between the first start time and the last end time is equal to the first electric energy exchange duration, and in the first period between the first start time and the last end time, the total electric energy exchange power of the electrically connected target battery cluster is equal to the first electric energy exchange power, and the total electric energy exchange power of the electrically connected target battery cluster in the latter period is less than the first electric energy exchange power; when N of the battery clusters do not meet the first electric energy exchange duration, the difference between the first start time and the last end time is less than the first electric energy exchange duration, and at each moment between the first start time and the last end time, the total electric energy exchange power of the target battery cluster is equal to the first electric energy exchange power.

[0013] According to one embodiment of the present disclosure, the configuration of the N battery clusters includes at least one of a battery cell, a module, an electrical box, an electrical cabinet, and a container; the type of the N battery clusters includes at least one of a power battery, an energy battery, a lithium iron phosphate battery, a nickel cobalt manganese battery, a lithium titanate battery, a lithium manganese oxide battery, a fresh battery, and an aged battery; the N battery clusters are all connected in series, all connected in parallel, or partially connected in series and partially connected in parallel.

[0014] According to one embodiment of the present disclosure, the N battery clusters include at least one energy-type battery cluster and at least one power-type battery cluster. When the N battery clusters do not meet the power exchange requirements, the power-type battery cluster is given priority to exchange power with the external power exchange end.

[0015] According to one embodiment of the present disclosure, when the N battery clusters do not meet the power exchange requirements, the method further includes: sending a request to enter a quick response mode to the external power exchange end; and upon receiving a confirmation reply to the request sent by the external power exchange end, executing the step of determining that the N battery clusters are all the target battery clusters.

[0016] According to an embodiment of the present disclosure, when the electric energy exchange demand includes electricity demand, the electric energy exchange capability includes discharge capability; when the electric energy exchange demand includes charging demand, the electric energy exchange capability includes charging capability.

[0017] To achieve the above-mentioned purpose, the second aspect of the present disclosure proposes a battery mixing system, which includes: N battery clusters, where N is an integer greater than 1; N battery managers, which correspond one-to-one to the N battery clusters; N switch units, which correspond one-to-one to the N battery clusters; and a power conversion unit, which is respectively communicated with the N battery managers and is used to obtain the power exchange capability of the corresponding battery cluster from the N battery managers when receiving the power exchange requirement sent by the external power exchange end, and determine the target battery cluster from the N battery clusters based on the power exchange requirement and the power exchange capability of the N battery clusters, and control the switch unit corresponding to the target battery cluster to be closed through the corresponding battery manager to establish an electrical connection between the target battery cluster and the power terminal so as to exchange power with the external power exchange end.

[0018] In addition, the battery mixing system of the above embodiment of the present disclosure may also have the following additional technical features:

[0019] According to one embodiment of the present disclosure, the power conversion unit is specifically used to: determine whether the N battery clusters meet the power exchange requirements based on the power exchange capabilities of the N batteries; if not, determine that the N battery clusters are all target battery clusters; if so, select all or part of the battery clusters from the N battery clusters as the target battery clusters based on the power exchange requirements and the power exchange capabilities of the N battery clusters.

[0020] According to one embodiment of the present disclosure, the N battery clusters include at least one energy-type battery cluster and at least one power-type battery cluster, and the power conversion unit is specifically used to: when the N battery clusters do not meet the power exchange requirements, preferentially establish an electrical connection between the power-type battery cluster and the external power exchange end through the battery manager corresponding to the power-type battery cluster.

[0021] According to one embodiment of the present disclosure, the power conversion unit is further specifically used to: when the N battery clusters do not meet the power exchange requirements, send a request to enter the fast response mode to the external power exchange end, and after receiving a confirmation reply sent by the external power exchange end, determine that the N battery clusters are all the target battery clusters.

[0022] To achieve the above-mentioned objectives, the third embodiment of the present disclosure proposes a control device for a battery mixing system, comprising a memory, a processor, and a computer program stored on the memory. When the processor executes the computer program, the control method for the battery mixing system is implemented.

[0023] To achieve the above-mentioned objectives, the fourth embodiment of the present disclosure proposes a non-temporary computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the control method of the battery mixing system is implemented.

[0024] The battery mixing system and its control method, control device and storage medium of the embodiments of the present disclosure mix different types of batteries, greatly improving the production, manufacturing and design availability of the battery mixing system, cooperating with the deployment control strategy of the power conversion unit, exploring the use potential of the battery mixing system, reducing system costs, developing usage scenarios of the battery mixing system, and improving the service life and safety of the battery mixing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a flow chart of a control method for a battery mixing system according to a first embodiment of the present disclosure;

[0026] FIG2 is a flow chart of a control method for a battery mixing system according to a second embodiment of the present disclosure;

[0027] 3 is a flow chart of a control method for a battery mixing system according to a third embodiment of the present disclosure;

[0028] FIG4 is a flow chart of a control method for a battery mixing system according to a fourth embodiment of the present disclosure;

[0029] FIG5 is a structural diagram of a battery mixing system according to an embodiment of the present disclosure;

[0030] FIG6 is a structural diagram of a battery mixing system according to another embodiment of the present disclosure;

[0031] FIG7 is a schematic diagram of a mixed use mode of battery clusters according to an embodiment of the present disclosure;

[0032] FIG8 is a structural block diagram of a control device for a battery mixing system according to an embodiment of the present disclosure;

[0033] FIG9 is a structural block diagram of a non-transitory computer-readable storage medium according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0035] The following describes a battery mixing system and a control method, a control device, and a storage medium thereof according to embodiments of the present disclosure with reference to the accompanying drawings.

[0036] FIG1 is a flow chart of a control method for a battery mixing system according to an embodiment of the present disclosure.

[0037] In this embodiment, the battery hybrid system includes N battery clusters connected in parallel, where N is an integer greater than 1. The control method of the battery hybrid system can be executed by the power conversion unit. Referring to FIG1 , the control method of the battery hybrid system includes:

[0038] S1, after receiving the power exchange demand sent by the external power exchange terminal, obtain the power exchange capabilities of N battery clusters.

[0039] Among them, when the electric energy exchange demand includes electricity demand, the electric energy exchange capacity includes discharge capacity; when the electric energy exchange demand includes charging demand, the electric energy exchange capacity includes charging capacity.

[0040] Specifically, power exchange requirements can include power consumption requirements, which can be from the grid or load. These requirements can be transmitted from the grid or load monitoring unit to the power conversion unit. Power exchange requirements can also include charging requirements, which can be transmitted from the power conversion unit to the grid monitoring unit, allowing the grid to charge the battery cluster. A battery manager can be assigned to each battery cluster, and the charge and discharge capabilities can be derived from battery status information (such as state of charge (SOC) and state of health (SOH)) obtained by the power conversion unit from each battery manager.

[0041] As an example, a correspondence between SOC, SOH and discharge capacity can be established in advance for each battery cluster, and the correspondence can be stored in the power conversion unit. Then, when the power conversion unit obtains the SOC and SOH of the battery cluster, it can look up the correspondence corresponding to the battery cluster to obtain the discharge capacity of the battery cluster.

[0042] S2 , determining a target battery cluster from the N battery clusters according to the power exchange requirement and the power exchange capabilities of the N battery clusters.

[0043] Specifically, the power exchange demand may include charging, power consumption and / or charging, power consumption time, and the power exchange capability may include charging, discharging power and / or charging, discharging time. For example, the power exchange demand includes power consumption, and the power exchange capability includes discharge power. The battery clusters can be arranged and combined according to the power consumption and each discharge power to determine the battery cluster (i.e., the target discharge battery cluster) used to power the grid or load. For another example, the power exchange demand includes power consumption time, and the power exchange capability includes discharge time. The battery clusters can be arranged and combined according to the power consumption time and each discharge time to determine the battery cluster (i.e., the target battery cluster) used to power the grid or load. For another example, the power exchange demand includes charging power, and the power exchange capability includes charging power. The grid power and time can be determined based on the charging power required by each battery cluster.

[0044] S3: Establishing an electrical connection between the target battery cluster and the external power exchange terminal to exchange power with the external power exchange terminal.

[0045] Specifically, a controllable switch is connected between each battery cluster and the power grid or load. After determining the target battery cluster, when the target battery cluster needs to supply power, the power conversion unit can control the controllable switch corresponding to the target battery cluster to close through the battery manager corresponding to the target battery cluster, and discharge to the power grid or load to meet the power requirements. When the target battery cluster needs to be charged, the battery manager corresponding to the target battery cluster can control the controllable switch corresponding to the target battery cluster to close and connect to the power grid to meet the charging requirements.

[0046] The control method of the battery mixing system of the embodiment of the present disclosure can mix different types of batteries to power the power consumption end, greatly improving the production, manufacturing and design availability of the battery mixing system, and enhancing the service life and safety of the battery mixing system.

[0047] In some embodiments, as shown in FIG2 , determining a target discharge battery cluster from N battery clusters based on the power exchange requirements and the power exchange capabilities of each battery cluster includes:

[0048] S21 , judging whether the N battery clusters meet the power exchange requirements based on the power exchange capabilities of the N battery clusters.

[0049] S22: If not satisfied, determine that all N battery clusters are target discharge battery clusters.

[0050] It should be noted that N battery clusters meeting the power exchange requirement means that the power exchange capacity of the N battery clusters exceeds the power exchange requirement. For example, the discharge capacity of the N battery clusters exceeds the power demand, or the rechargeable capacity of the N battery clusters exceeds the charging demand provided by the external power exchange terminal.

[0051] S23 , if the conditions are met, then selecting all or part of the battery clusters from the N battery clusters as target battery clusters based on the power exchange requirements and the power exchange capabilities of the N battery clusters.

[0052] In some embodiments, as shown in FIG3 , the power exchange requirement includes a first power exchange power and a first power exchange duration, and the power exchange capability includes a second power exchange power and a second power exchange duration. Determining whether the N battery clusters meet the power exchange requirement based on the power exchange capabilities of the N battery clusters includes:

[0053] S31 , calculating the product of the second electric energy exchange power and the second electric energy exchange duration of the N battery clusters to obtain N first products, and calculating the sum of the N first products.

[0054] S32: Calculate the product of the first electric energy exchange power and the first electric energy exchange duration to obtain a second product, and calculate the difference between the sum and the second product.

[0055] S33 , if the difference is greater than or equal to a first preset value, it is determined that the N battery clusters meet the power exchange requirement, wherein the first preset value is a positive value.

[0056] S34: If the difference is less than the first preset value, it is determined that the N battery clusters do not meet the power exchange requirement.

[0057] In some embodiments, when N battery clusters meet the power exchange requirement, the sum of the first products corresponding to all target battery clusters is greater than the second product.

[0058] In some embodiments, as shown in FIG4 , establishing an electrical connection between the target battery cluster and the external power exchange terminal includes:

[0059] S41 , determining the start time and the end time of the electrical connection between each target battery cluster and the external power exchange terminal.

[0060] S42: establishing electrical connections between the corresponding target battery cluster and the external power exchange terminal according to the start time and the end time.

[0061] In some embodiments, when N battery clusters meet the energy exchange requirements, the difference between the first start time and the last end time is equal to the first energy exchange duration, and at each moment between the first start time and the last end time, the total energy exchange power of the electrically connected target battery cluster is equal to the first energy exchange power; when N battery clusters do not meet the energy exchange power, the difference between the first start time and the last end time is equal to the first energy exchange duration, and in the first period between the first start time and the last end time, the total energy exchange power of the electrically connected target battery cluster is equal to the first energy exchange power, and the total energy exchange power of the electrically connected target battery cluster in the latter period is less than the first energy exchange power; when N battery clusters do not meet the first energy exchange duration, the difference between the first start time and the last end time is less than the first energy exchange duration, and at each moment between the first start time and the last end time, the total energy exchange power of the target battery cluster is equal to the first energy exchange power.

[0062] In some embodiments, the configuration of the N battery clusters includes at least one of a battery cell, a module, an electrical box, an electrical cabinet, and a container; the type of the N battery clusters includes at least one of a power battery, an energy battery, a lithium iron phosphate battery, a nickel cobalt manganese battery, a lithium titanate battery, a lithium manganese oxide battery, a fresh battery, and an aged battery; and the N battery clusters are all connected in series, all connected in parallel, or partially connected in series and partially connected in parallel.

[0063] In some embodiments, the N battery clusters include at least one energy battery cluster and at least one power battery cluster. When the N battery clusters do not meet the power exchange requirements, the power battery cluster is given priority to exchange power with the external power exchange terminal.

[0064] In this embodiment, when N battery clusters do not meet the power exchange requirements, the method may further include: sending a request to enter a fast response mode to an external power exchange terminal; and upon receiving a confirmation reply to the request sent by the external power exchange terminal, executing a step of determining that all N battery clusters are target battery clusters.

[0065] Specifically, taking electricity demand as an example, the electricity user can be powered by multiple power stations, each of which is equipped with N battery clusters and a power conversion unit. For example, the number of power stations is 2, and the two power stations are respectively recorded as Station A and Station B. The electricity user first sends the electricity demand to the power conversion unit of Station A. If the power conversion unit of Station A determines that the N battery clusters of Station A cannot meet the electricity demand, the power conversion unit of Station A can send a request to the electricity user to enter the fast response mode. After receiving the request, the electricity user can send the electricity demand to the power conversion unit of Station B. If the battery cluster of Station B can meet the electricity demand of the electricity user, the electricity user may not confirm the request sent by Station A, and Station A will not supply power at this time. If the battery cluster of Station B cannot meet the electricity demand of the electricity user, the electricity user can confirm the request sent by Station A, and Station A will provide power.

[0066] In summary, the control method of the battery mixing system of the embodiment of the present disclosure mixes different types of batteries, greatly improves the production, manufacturing and design availability of the battery mixing system, and enhances the service life and safety of the battery mixing system.

[0067] FIG5 is a structural diagram of a battery mixing system according to an embodiment of the present disclosure.

[0068] The battery mixing system 500 includes: N battery clusters 501 , N battery managers 502 , N switch units 503 , and a power conversion unit 504 .

[0069] Among them, N battery clusters 501 are connected in parallel, N battery managers 502 correspond to the N battery clusters 501 one-to-one, and N switch units 503 correspond to the N battery clusters 501 one-to-one; the power conversion unit 504 is respectively communicated with the N battery managers 502, and is used to obtain the power exchange capability of the corresponding battery cluster from the N battery managers 502 when receiving the power exchange demand sent by the external power exchange end, and determine the target battery cluster from the N battery clusters 501 according to the power exchange demand and the power exchange capability of the N battery clusters 501, and control the switch unit 503 corresponding to the target battery cluster to be closed through the corresponding battery manager 502, so as to establish an electrical connection between the target battery cluster and the power terminal, so as to exchange power with the external power exchange end.

[0070] Specifically, a connection relationship of the battery mixing system 500 is shown in Figure 6. Each battery cluster (i.e., battery cluster 501) is controlled by a separate BMS (i.e., battery manager 502). Switching devices K1 to Kn (i.e., switching unit 503) are required between each battery cluster and the power conversion unit (i.e., power conversion unit 504). The switching devices can be formed by series and parallel connections of devices such as relays, MOS tubes (Metal-Oxide-Semiconductor Field-Effect Transistor), IGBTs (Insulated Gate Bipolar Transistor), and SIC-MOS (SiC MOSFET). K1 to Kn are driven and controlled by the BMS or power unit to determine whether the battery cluster is connected to the power conversion unit for adjustment and control.

[0071] The battery mixing system of the disclosed embodiment mixes different types of batteries, significantly improving the production, manufacturing, and design availability of the battery mixing system. It cooperates with the deployment and control strategy of the power conversion unit to explore the potential of the battery mixing system, reduce system costs, develop usage scenarios for the battery mixing system, and improve the service life and safety of the battery mixing system.

[0072] In some embodiments, different battery clusters 501 are mixed and used as shown in FIG7 :

[0073] Combination 1: Battery cluster 1 is a power-type battery, and battery cluster 2 is an energy-type battery. The battery cluster includes: battery cells, modules, electrical boxes, electrical cabinets, containers, etc. Battery clusters 1 and 2 in combination 1 are only examples. There can be N battery clusters, and the series and parallel connection modes of battery clusters 1 and 2 are not limited. N battery clusters connected in series and parallel constitute a battery cluster system.

[0074] Combination 2: Battery cluster 1 is LFP (LiFePO4, lithium iron phosphate) battery, and battery cluster 2 is NCM (nickel cobalt manganese) battery. Here, the battery cluster includes: battery cells, modules, electrical boxes, electrical cabinets, containers, etc. Battery clusters 1 and 2 in combination 2 are only examples. There can be N battery clusters, and the series and parallel connection mode of battery clusters 1 and 2 is not limited. The N battery clusters can include battery types such as LFP, NCM, lithium titanate, lithium manganate, etc. N battery clusters are connected in series and parallel to form a battery cluster system.

[0075] Combination 3: Battery cluster 1 is a BOL battery (battery in a fresh state), battery cluster 2 is a MOL battery (battery attenuated to a certain state, SOH (state of health) is usually greater than 70%), and battery cluster numbered N can also be an MOL battery. Here, battery clusters include: battery cells, modules, electrical boxes, electrical cabinets, containers, etc. Battery clusters 1 and 2 in combination 1 are only examples. There can be N battery clusters, and the series and parallel connection mode of battery clusters 1 and 2 is not limited. N battery clusters connected in series and parallel constitute a battery cluster system.

[0076] The mixed use of the battery clusters 501 shown in FIG7 is merely an example and should not limit the functions and scope of use of the embodiments of the present disclosure.

[0077] In some embodiments, the power conversion unit 504 is specifically used to: determine whether the N battery clusters 501 meet the power exchange requirements based on the power exchange capabilities of the N batteries; if not, determine that the N battery clusters 501 are all target battery clusters; if so, select all or part of the battery clusters from the N battery clusters 501 as target battery clusters based on the power exchange requirements and the power exchange capabilities of the N battery clusters 501.

[0078] Specifically, the load or grid requests the power consumption P_out and power consumption time T_out from the power conversion unit 504 according to its own needs. The power conversion unit 504 requires each battery manager 502 to report the current battery status of the corresponding battery cluster 501, clarify the current discharge capacity of the N battery clusters 501 (which can be the discharge power within a certain period of time), and report it to the power conversion unit 504. The power conversion unit 504 determines whether the current status of the N battery clusters 501 can meet the requirements P_out and T_out. After determining that both P_out and T_out are met, the power conversion unit 504 again determines whether all battery clusters 501 need to participate in the discharge. After determining that all battery clusters 501 need to participate in the discharge, the power conversion unit 504 issues an instruction, and each battery manager 502 drives all switch units 503 to close, so that all battery clusters 501 participate in the discharge and respond to the needs of the load or grid. If not all battery clusters 501 do not need to participate in the discharge, the power conversion unit 504 issues an instruction to allow some battery clusters 501 to participate in the discharge. Each battery manager 502 responds by closing the corresponding switch unit 503 to participate in the discharge.

[0079] In some embodiments, the N battery clusters 501 include at least one energy-type battery cluster 501 and at least one power-type battery cluster 501, and the power conversion unit 504 is specifically used to: when the N battery clusters 501 do not meet the power exchange requirements, preferentially establish an electrical connection between the power-type battery cluster and the external power exchange end through the battery manager 502 corresponding to the power-type battery cluster 501.

[0080] In some embodiments, the power conversion unit 504 is further specifically used to: when the N battery clusters 501 do not meet the power exchange requirements, send a request to the external power exchange end to enter the fast response mode, and after receiving the confirmation reply sent by the external power exchange end, determine that the N battery clusters 501 are all target battery clusters.

[0081] Specifically, after the power conversion unit 504 determines that the current states of the N battery clusters 501 cannot simultaneously meet P_out and T_out, the power conversion unit 504 feeds back the above information to the load or the power grid, and applies to enter the fast response mode. After obtaining a confirmation reply, the power conversion unit 504 drives the corresponding switch unit 503 of the power-type battery cluster 501 to close, and outputs a full and fast response, and then turns on the output of the energy-type battery cluster 501 according to demand.

[0082] To sum up, the battery mixing system of the embodiment of the present disclosure mixes different types of batteries, greatly improving the production, manufacturing and design availability of the battery mixing system, cooperating with the deployment control strategy of the power conversion unit, exploring the use potential of the battery mixing system, reducing system costs, developing usage scenarios of the battery mixing system, and improving the service life and safety of the battery mixing system.

[0083] FIG8 is a structural block diagram of a control device for a battery mixing system according to an embodiment of the present disclosure.

[0084] As shown in Figure 8, control device 800 includes a processor 801 and a memory 803. Processor 801 and memory 803 are connected, for example, via a bus 802. Optionally, controller 800 may also include a transceiver 804. It should be noted that in practical applications, there is not limited to one transceiver 804, and the structure of controller 800 does not constitute a limitation on the embodiments of the present disclosure.

[0085] The processor 801 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the present disclosure. The processor 801 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0086] Bus 802 may include a path for transmitting information between the aforementioned components. Bus 802 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, for example. Bus 802 may be divided into an address bus, a data bus, a control bus, and so on. For ease of illustration, FIG8 shows only one thick line, but this does not indicate that there is only one bus or only one type of bus.

[0087] The memory 803 is used to store a computer program corresponding to the control method of the battery hybrid system according to the above embodiment of the present disclosure, and the computer program is controlled and executed by the processor 801. The processor 801 is used to execute the computer program stored in the memory 803 to implement the content of the above method embodiment.

[0088] The control device 800 includes, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), and in-vehicle terminals (e.g., in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. The control device 800 shown in FIG8 is merely an example and should not limit the functionality or scope of use of the embodiments of the present disclosure.

[0089] FIG9 is a structural block diagram of a non-transitory computer-readable storage medium according to an embodiment of the present disclosure.

[0090] As shown in FIG9 , the storage medium 800 stores a computer program, and when the computer program is executed by the processor 801 , the control method of the battery mixing system described above is implemented.

[0091] The non-temporary computer-readable storage medium of the disclosed embodiment, by implementing a control method for a battery mixing system, mixes different types of batteries, thereby significantly improving the production, manufacturing, and design availability of the battery mixing system. In conjunction with the deployment control strategy of the power conversion unit, the potential for use of the battery mixing system is explored, system costs are reduced, usage scenarios for the battery mixing system are developed, and the service life and safety of the battery mixing system are improved.

[0092] It should be noted that the logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device), or in conjunction with such instruction execution system, apparatus, or device. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, apparatus, or device, or in conjunction with such instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection portion having one or more wires (electronic device), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0093] It should be understood that various parts of the present disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0094] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0095] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0096] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0097] In this disclosure, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0098] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0099] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A control method for a battery mixing system, characterized in that: The battery mixing system includes N battery clusters, where N is an integer greater than 1. The method includes: After receiving the power exchange demand sent by the external power exchange terminal, obtaining the power exchange capabilities of the N battery clusters; determining a target battery cluster from the N battery clusters according to the power exchange requirement and the power exchange capabilities of the N battery clusters; An electrical connection is established between the target battery cluster and the external power exchange terminal to exchange power with the external power exchange terminal.

2. The method according to claim 1, characterized in that The step of determining a target battery cluster from the N battery clusters according to the power exchange requirement and the power exchange capability of each battery cluster includes: determining, based on the power exchange capabilities of the N battery clusters, whether the N battery clusters meet the power exchange requirements; If not, determining that the N battery clusters are all the target battery clusters; If the conditions are met, all or part of the battery clusters are selected from the N battery clusters as the target battery clusters according to the power exchange requirements and the power exchange capabilities of the N battery clusters.

3. The method according to claim 2, characterized in that The electric energy exchange requirement includes a first electric energy exchange power and a first electric energy exchange duration, the electric energy exchange capability includes a second electric energy exchange power and a second electric energy exchange duration, and determining whether the N battery clusters meet the electric energy exchange requirement based on the electric energy exchange capabilities of the N battery clusters includes: Calculating the product of the second electric energy exchange power and the second electric energy exchange duration of the N battery clusters to obtain N first products, and calculating the sum of the N first products; Calculating the product of the first electric energy exchange power and the first electric energy exchange duration to obtain a second product, and calculating the difference between the sum and the second product; If the difference is greater than or equal to a first preset value, it is determined that the N battery clusters meet the power exchange requirement, wherein the first preset value is a positive value; If the difference is smaller than the first preset value, it is determined that the N battery clusters do not meet the power exchange requirement.

4. The method according to claim 3, characterized in that When N of the battery clusters meet the power exchange requirement, the sum of the first products corresponding to all target battery clusters is greater than the second product.

5. The method according to claim 3, characterized in that The establishing of an electrical connection between the target battery cluster and the external power exchange terminal includes: Determine the start time and end time of the electrical connection between each target battery cluster and the external power exchange terminal; An electrical connection is established between the corresponding target battery cluster and the external power exchange end according to each of the start time and the end time.

6. The method according to claim 4, characterized in that When the N battery clusters meet the power exchange requirement, the difference between the first start time and the last end time is equal to the first power exchange duration, and at each moment between the first start time and the last end time, the total power exchanged by the electrically connected target battery cluster is equal to the first power exchange power; When the N battery clusters do not meet the electric energy exchange power, the difference between the first start time and the last end time is equal to the first electric energy exchange duration, and in the first period between the first start time and the last end time, the total electric energy exchange power of the electrically connected target battery cluster is equal to the first electric energy exchange power, and in the second period, the total electric energy exchange power of the electrically connected target battery cluster is less than the first electric energy exchange power; When the N battery clusters do not meet the first power exchange duration, the difference between the first start time and the last end time is less than the first power exchange duration, and at each moment between the first start time and the last end time, the total power exchange power of the target battery cluster is equal to the first power exchange power.

7. The method according to claim 2, characterized in that The configuration of the N battery clusters includes at least one of a battery cell, a module, an electrical box, an electrical cabinet, and a container. The types of the N battery clusters include at least one of a power battery, an energy battery, a lithium iron phosphate battery, a nickel cobalt manganese battery, a lithium titanate battery, a lithium manganese oxide battery, a fresh battery, and an aged battery. The N battery clusters are all connected in series, all connected in parallel, or partially connected in series and partially connected in parallel.

8. The method according to claim 7, characterized in that The N battery clusters include at least one energy-type battery cluster and at least one power-type battery cluster. When the N battery clusters do not meet the power exchange requirement, the power-type battery cluster is given priority to exchange power with the external power exchange end.

9. The method according to claim 1, characterized in that When the N battery clusters do not meet the power exchange requirement, the method further includes: Sending a request to the external power exchange terminal to enter a fast response mode; After receiving a confirmation reply to the request sent by the external power exchange terminal, the step of determining that all the N battery clusters are the target battery clusters is performed.

10. The method according to claim 1, characterized in that When the electric energy exchange demand includes electricity demand, the electric energy exchange capability includes discharge capability; When the power exchange demand includes a charging demand, the power exchange capability includes a charging capability.

11. A battery mixing system, characterized in that: The system comprises: N battery clusters, where N is an integer greater than 1; N battery managers, each of the N battery managers corresponding to each of the N battery clusters; N switch units, wherein the N switch units correspond one-to-one to the N battery clusters; The power conversion unit is respectively communicated with the N battery managers, and is used to obtain the power exchange capabilities of the corresponding battery clusters from the N battery managers when receiving the power exchange requirements sent by the external power exchange end, and determine the target battery cluster from the N battery clusters based on the power exchange requirements and the power exchange capabilities of the N battery clusters, and control the switching unit corresponding to the target battery cluster to be closed through the corresponding battery manager, so as to establish an electrical connection between the target battery cluster and the power terminal, so as to exchange power with the external power exchange end.

12. The system according to claim 11, wherein: The power conversion unit is specifically used for: determining, based on the power exchange capabilities of the N batteries, whether the N battery clusters meet the power exchange requirements; If not, determining that the N battery clusters are all the target battery clusters; If the conditions are met, all or part of the battery clusters are selected from the N battery clusters as the target battery clusters according to the power exchange requirements and the power exchange capabilities of the N battery clusters.

13. The system according to claim 12, wherein: The N battery clusters include at least one energy-type battery cluster and at least one power-type battery cluster, and the power conversion unit is further configured to: When the N battery clusters do not meet the power exchange requirement, the battery manager corresponding to the power battery cluster is preferentially used to establish an electrical connection between the power battery cluster and the external power exchange end.

14. The system according to claim 13, wherein: The power conversion unit is further configured to: When the N battery clusters do not meet the power exchange requirement, a request to enter a fast response mode is sent to the external power exchange end, and after receiving a confirmation reply sent by the external power exchange end, it is determined that the N battery clusters are all the target battery clusters.

15. A control device for a battery mixing system, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory, wherein when the processor executes the computer program, the method according to any one of claims 1 to 10 is implemented.

16. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 10 is implemented.

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