CN116365605B - Control system and method based on distributed energy supply requirements - Google Patents
Control system and method based on distributed energy supply requirements Download PDFInfo
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- CN116365605B CN116365605B CN202310638660.1A CN202310638660A CN116365605B CN 116365605 B CN116365605 B CN 116365605B CN 202310638660 A CN202310638660 A CN 202310638660A CN 116365605 B CN116365605 B CN 116365605B
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- 238000007600 charging Methods 0.000 claims description 36
- 230000007613 environmental effect Effects 0.000 claims description 31
- 238000010277 constant-current charging Methods 0.000 claims description 18
- 238000010280 constant potential charging Methods 0.000 claims description 15
- 238000013507 mapping Methods 0.000 claims description 13
- 239000003792 electrolyte Substances 0.000 claims description 10
- 230000005059 dormancy Effects 0.000 claims description 6
- 239000007772 electrode material Substances 0.000 claims description 6
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- 238000003860 storage Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052799 carbon Inorganic materials 0.000 abstract description 10
- 238000004134 energy conservation Methods 0.000 abstract description 8
- 208000028659 discharge Diseases 0.000 description 89
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- 230000009286 beneficial effect Effects 0.000 description 8
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- 238000012545 processing Methods 0.000 description 3
- 239000007784 solid electrolyte Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a control system and a control method based on distributed energy supply requirements, wherein the system comprises a first determining module, a second determining module, a starting module, a monitoring module, a judging module and an adjusting module: starting a plurality of working power supply modules from a plurality of power supply modules included in the formation/capacity-division equipment according to a process flow to be executed and the initial number of the power supply modules to be started, which is determined based on the process flow, so as to perform cell formation/capacity division; in the process of forming/capacity-dividing the battery core, judging whether the power supply module needs to be adjusted according to the monitored working electric parameters of all the working power supply modules, and if so, adjusting the power supply module. Compared with the existing power supply mode of the power supply module, the method has the advantages that the initial quantity of the starting power supply modules is intelligently determined, the working quantity of the power supply modules is adaptively adjusted in the formation/capacity-division process, the energy supply efficiency of formation/capacity-division equipment is improved, the electric energy loss is reduced, and energy conservation and carbon reduction are realized.
Description
Technical Field
The invention relates to the technical field of automatic production lines of power batteries, in particular to a control system and method based on distributed energy supply requirements in a formation/capacity-division process.
Background
Along with the application of the automatic power battery production line, the formation and capacity division of the battery core become large heads of energy consumption, and how to improve the formation and capacity division efficiency is also more and more important. In practical application, the battery cell of the lithium battery must be charged and activated after the assembly is completed, and the first charging process of the battery cell is called formation, and is used for activating the active material in the battery cell to generate an SEI film (i.e. SolidElectrolyte Interface, solid electrolyte interface film). The battery cells are subjected to formation and then subjected to ¬ capacity division, and the capacity division is to charge and discharge the formed battery cells so as to detect the performance of the battery cells, and then the battery cells are conveniently graded and assembled according to the capacity.
Currently, formation/capacity division is generally implemented by integrally controlling a power module (e.g., integrally turning on/off the power module) according to a predetermined process step file, and charging and discharging a plurality of series-connected battery cells until the whole process step file is completed. However, through practice, the current of the battery cell charging/discharging fluctuates in a certain interval, for example, in a 0.1-2C interval, so that corresponding adjustment is performed according to different step requirements, but the output power of the started power supply module is usually far higher than the normal use power, and the problem that the output power is not matched with the normal use power is caused, so that the corresponding energy supply efficiency cannot reach the optimal efficiency; in addition, in the working process of formation/capacity division, the existing energy supply mode cannot provide the optimal working quantity of the power supply modules according to actual requirements.
In a word, the existing energy supply mode cannot adaptively start and regulate the initial number and the working number of the power supply modules, so that the overall energy supply efficiency is low, and the energy supply efficiency of the formation/capacity-division equipment is not improved. Therefore, it is important to provide a control system and method based on the distributed energy supply requirement in the formation/capacity-division process.
Disclosure of Invention
Compared with the existing power supply mode of the power supply module, the control system and the control method based on the distributed energy supply requirement can intelligently determine the initial number of the starting power supply modules, adaptively adjust the working number of the power supply modules in the formation/capacity-division process, improve the energy supply efficiency of formation/capacity-division equipment, reduce the electric energy loss and realize energy conservation and carbon reduction.
To solve the above technical problem, a first aspect of the present invention discloses a control method based on distributed energy supply requirements, the method comprising:
determining a process flow to be executed by the formation/capacity-division equipment according to a preset process file, and determining the initial number of power modules to be started according to the process flow;
Starting a plurality of working power supply modules matched with the initial number from a plurality of power supply modules included in the formation/capacity-dividing equipment according to the process flow and the initial number, so that the formation/capacity-dividing equipment executes electric core formation/capacity-dividing operation according to the process flow;
monitoring the working electric parameters of each working power supply module in the process of executing the cell formation/capacity division operation, and judging whether the power supply module adjustment operation is required to be executed according to the working electric parameters of all the working power supply modules; the power supply module adjusting operation is used for adjusting the working quantity of the power supply modules needing to work;
and when the judgment result is yes, executing the power module adjusting operation.
As an optional implementation manner, in the first aspect of the present invention, the process to be performed includes a process corresponding to a constant-current charging/discharging stage, or includes a process corresponding to a constant-voltage charging/discharging stage;
wherein, according to the process flow, determining the initial number of the power modules to be started includes:
determining a limiting electrical parameter of each of the power modules; the limiting electrical parameter comprises a maximum output current parameter;
When the process flow to be executed comprises a process flow corresponding to the constant-current charging/discharging stage, determining charging/discharging current demand parameters aiming at the constant-current charging/discharging stage, and determining the initial number of power modules to be started according to the maximum output current parameters of each power module and the charging/discharging current demand parameters;
when the process flow to be executed includes a process flow corresponding to the constant voltage charging/discharging stage, determining charging/discharging voltage demand parameters for the constant voltage charging/discharging stage, and determining the initial number of power modules to be started according to the maximum output current parameter of each power module and the charging/discharging voltage demand parameters.
As an optional implementation manner, in the first aspect of the present invention, the determining, according to the maximum output current parameter of each power module and the charge/discharge voltage requirement parameter, an initial number of power modules that need to be started includes:
acquiring tab voltage parameters of a target battery cell needing formation/capacity division;
determining a voltage difference between the tab voltage parameter and the charge/discharge voltage demand parameter according to the tab voltage parameter and the charge/discharge voltage demand parameter;
Determining starting current parameters required by the formation/capacity-division equipment from a preset differential pressure current mapping table according to the differential pressure current mapping table and the voltage difference value;
and determining the initial number of the power modules to be started according to the maximum output current parameter and the starting current parameter of each power module.
As an optional implementation manner, in the first aspect of the present invention, the operation electrical parameter of each operation power module includes an operation current parameter and an operation voltage parameter of the operation power module;
wherein, according to all the working power supply module working electric parameters, judging whether the power supply module adjustment operation needs to be executed, including:
acquiring a preset efficiency curve of the formation/capacity-division equipment and energy efficiency demand parameters of the formation/capacity-division equipment, and determining a target efficiency range corresponding to the formation/capacity-division equipment from the efficiency curve according to the efficiency curve and the energy efficiency demand parameters; the efficiency curve of the formation/capacity-division equipment represents the corresponding relation between the load rate and the efficiency of the formation/capacity-division equipment;
calculating the sum of the working power parameters of all the working power modules according to the working current parameters and the corresponding working voltage parameters of each working power module;
Determining the sum of the maximum output power parameters of all the working power supply modules, and determining the work load rates corresponding to all the working power supply modules according to the ratio between the sum of the working power parameters and the sum of the maximum output power parameters;
judging whether the workload rate is within the target efficiency range;
and when the judging result is negative, determining that the power module adjusting operation needs to be executed.
As an optional implementation manner, in the first aspect of the present invention, the performing the power module adjustment operation includes:
when the work load rate is smaller than the minimum load rate in the target efficiency range, determining the first power module demand quantity of the formation/capacity-division equipment, and closing or dormancy work power modules matched with the first difference parameter in all the work power modules according to the first difference parameter between the initial quantity and the first power module demand quantity;
and when the work load rate is larger than the maximum load rate in the target efficiency range, determining the required number of second power modules of the formation/capacity-division equipment, and starting the power modules matched with the second difference parameters from all the power modules except all the work power modules according to the second difference parameters between the required number of the second power modules and the initial number.
As an optional implementation manner, in the first aspect of the present invention, before the determining, according to the preset step file, a step flow to be executed by the forming/capacity-dividing device, the method further includes:
acquiring cell parameters of a target cell which needs formation/capacity division; the battery cell parameters of the target battery cell comprise at least one of electrolyte type parameters, electrode material type parameters, battery cell packaging type parameters, diaphragm type parameters, battery cell liquid injection port state parameters and test requirement parameters of the target battery cell;
determining a charging/discharging demand parameter corresponding to the target battery cell according to the battery cell parameter of the target battery cell; the charge/discharge demand parameters corresponding to the target battery cells comprise charge/discharge demand modes corresponding to the target battery cells and target demand parameters aiming at the charge/discharge demand modes, the charge/discharge demand modes comprise constant-current charge/discharge modes and/or constant-voltage charge/discharge modes, and the target demand parameters comprise at least one of charge/discharge time demand parameters, charge/discharge circuit demand parameters, charge/discharge protection demand parameters, shelf time demand parameters and circulation demand parameters;
And generating a step file of the formation/capacity-division equipment according to the charge/discharge demand parameters corresponding to the target battery cell.
As an optional implementation manner, in the first aspect of the present invention, before the determining, according to the cell parameter of the target cell, a charge/discharge requirement parameter corresponding to the target cell, the method further includes:
acquiring environmental parameters of a formation/capacity-division environment in which the target battery cell is positioned; the environmental parameters include at least one of humidity environmental parameters, temperature environmental parameters, and pressure environmental parameters;
determining the formation/capacity-division influence condition of the formation/capacity-division environment on the target battery cell according to the environment parameter and the battery cell parameter; the formation/capacity-division influence condition comprises at least one of electrolyte interface stability influence condition, cell tightness influence condition and cell deformation influence condition;
determining the formation/capacity-division influence degree of the formation/capacity-division environment on the target cell according to the formation/capacity-division influence condition, and judging whether the formation/capacity-division influence degree is greater than or equal to a preset influence degree threshold;
and when the judgment result is yes, determining the charge/discharge demand parameters corresponding to the target battery cell according to the environment parameters and the battery cell parameters.
In a second aspect, the invention discloses a control system based on distributed energy supply requirements, the system comprising:
the first determining module is used for determining a process flow to be executed by the formation/capacity-division equipment according to a preset process file;
the second determining module is used for determining the initial number of the power modules to be started according to the process steps;
the starting module is used for starting a plurality of working power supply modules matched with the initial quantity from a plurality of power supply modules included in the formation/capacity-dividing equipment according to the process flow and the initial quantity, so that the formation/capacity-dividing equipment can execute cell formation/capacity-dividing operation according to the process flow;
the monitoring module is used for monitoring the working electric parameters of each working power supply module in the process of executing the cell formation/capacity division operation;
the judging module is used for judging whether the power supply module adjusting operation is required to be executed according to the working electric parameters of all the working power supply modules; the power supply module adjusting operation is used for adjusting the working quantity of the power supply modules needing to work;
and the adjusting module is used for executing the power supply module adjusting operation when the judging result of the judging module is yes.
As an optional implementation manner, in the second aspect of the present invention, the process to be performed includes a process corresponding to a constant-current charging/discharging stage, or includes a process corresponding to a constant-voltage charging/discharging stage;
the second determining module determines, according to the process step flow, the initial number of power modules to be started specifically as follows:
determining a limiting electrical parameter of each of the power modules; the limiting electrical parameter comprises a maximum output current parameter;
when the process flow to be executed comprises a process flow corresponding to the constant-current charging/discharging stage, determining charging/discharging current demand parameters aiming at the constant-current charging/discharging stage, and determining the initial number of power modules to be started according to the maximum output current parameters of each power module and the charging/discharging current demand parameters;
when the process flow to be executed includes a process flow corresponding to the constant voltage charging/discharging stage, determining charging/discharging voltage demand parameters for the constant voltage charging/discharging stage, and determining the initial number of power modules to be started according to the maximum output current parameter of each power module and the charging/discharging voltage demand parameters.
In a second aspect of the present invention, the second determining module determines, according to the maximum output current parameter of each power module and the charge/discharge voltage requirement parameter, the initial number of power modules to be started specifically by:
acquiring tab voltage parameters of a target battery cell needing formation/capacity division;
determining a voltage difference between the tab voltage parameter and the charge/discharge voltage demand parameter according to the tab voltage parameter and the charge/discharge voltage demand parameter;
determining starting current parameters required by the formation/capacity-division equipment from a preset differential pressure current mapping table according to the differential pressure current mapping table and the voltage difference value;
and determining the initial number of the power modules to be started according to the maximum output current parameter and the starting current parameter of each power module.
As an optional implementation manner, in the second aspect of the present invention, the operation electrical parameter of each operation power module includes an operation current parameter and an operation voltage parameter of the operation power module;
the judging module judges whether the power supply module adjusting operation needs to be executed according to all the working electric parameters of the working power supply module, and the mode specifically comprises the following steps:
Acquiring a preset efficiency curve of the formation/capacity-division equipment and energy efficiency demand parameters of the formation/capacity-division equipment, and determining a target efficiency range corresponding to the formation/capacity-division equipment from the efficiency curve according to the efficiency curve and the energy efficiency demand parameters; the efficiency curve of the formation/capacity-division equipment represents the corresponding relation between the load rate and the efficiency of the formation/capacity-division equipment;
calculating the sum of the working power parameters of all the working power modules according to the working current parameters and the corresponding working voltage parameters of each working power module;
determining the sum of the maximum output power parameters of all the working power supply modules, and determining the work load rates corresponding to all the working power supply modules according to the ratio between the sum of the working power parameters and the sum of the maximum output power parameters;
judging whether the workload rate is within the target efficiency range;
and when the judging result is negative, determining that the power module adjusting operation needs to be executed.
As an optional implementation manner, in the second aspect of the present invention, the manner in which the adjustment module performs the adjustment operation of the power module is specifically:
When the work load rate is smaller than the minimum load rate in the target efficiency range, determining the first power module demand quantity of the formation/capacity-division equipment, and closing or dormancy work power modules matched with the first difference parameter in all the work power modules according to the first difference parameter between the initial quantity and the first power module demand quantity;
and when the work load rate is larger than the maximum load rate in the target efficiency range, determining the required number of second power modules of the formation/capacity-division equipment, and starting the power modules matched with the second difference parameters from all the power modules except all the work power modules according to the second difference parameters between the required number of the second power modules and the initial number.
As an alternative embodiment, in the second aspect of the present invention, the system further includes:
the acquisition module is used for acquiring the cell parameters of the target cell needing formation/capacity division before the first determination module determines the process flow to be executed by the formation/capacity division equipment according to the preset process file; the battery cell parameters of the target battery cell comprise at least one of electrolyte type parameters, electrode material type parameters, battery cell packaging type parameters, diaphragm type parameters, battery cell liquid injection port state parameters and test requirement parameters of the target battery cell;
The first determining module is further configured to determine a charge/discharge demand parameter corresponding to the target battery cell according to a battery cell parameter of the target battery cell; the charge/discharge demand parameters corresponding to the target battery cells comprise charge/discharge demand modes corresponding to the target battery cells and target demand parameters aiming at the charge/discharge demand modes, the charge/discharge demand modes comprise constant-current charge/discharge modes and/or constant-voltage charge/discharge modes, and the target demand parameters comprise at least one of charge/discharge time demand parameters, charge/discharge circuit demand parameters, charge/discharge protection demand parameters, shelf time demand parameters and circulation demand parameters;
and the generating module is used for generating a step file of the formation/capacity-division equipment according to the charge/discharge demand parameters corresponding to the target battery cell.
As an optional implementation manner, in the second aspect of the present invention, the obtaining module is further configured to:
acquiring environmental parameters of a formation/capacity-division environment in which the target battery cell is positioned before the first determination module determines the charge/discharge demand parameters corresponding to the target battery cell according to the battery cell parameters of the target battery cell; the environmental parameters include at least one of humidity environmental parameters, temperature environmental parameters, and pressure environmental parameters;
The first determining module is further configured to determine a formation/capacity-division influence condition of the formation/capacity-division environment on the target battery cell according to the environmental parameter and the battery cell parameter; the formation/capacity-division influence condition comprises at least one of electrolyte interface stability influence condition, cell tightness influence condition and cell deformation influence condition; determining the influence degree of the formation/capacity division environment on the target cell according to the influence condition of the formation/capacity division;
the judging module is further used for judging whether the formation/capacity-division influence degree is greater than or equal to a preset influence degree threshold value;
and the first determining module is further configured to determine a charge/discharge demand parameter corresponding to the target battery cell according to the environmental parameter and the battery cell parameter when the judging result of the judging module is yes.
A third aspect of the invention discloses a control system based on distributed energy supply demand, the system comprising:
a memory storing executable program code;
a processor coupled to the memory;
the processor invokes the executable program code stored in the memory to execute the control method based on distributed energy supply requirements disclosed in the first aspect of the present invention.
A fourth aspect of the present invention discloses a computer storage medium storing computer instructions which, when invoked, are adapted to carry out the control method based on distributed energy supply requirements disclosed in the first aspect of the present invention.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the initial number of the power modules to be started is determined according to the determined process flow to be executed of the formation/capacity-division equipment; starting a plurality of working power supply modules from a plurality of power supply modules included in the formation/capacity-dividing equipment according to the process flow and the initial quantity, so that the formation/capacity-dividing equipment executes the cell formation/capacity-dividing operation according to the process flow; in the process of executing the cell formation/capacity division operation, judging whether the power supply module needs to be adjusted according to the monitored working electric parameters of all the working power supply modules, and if so, adjusting the power supply module. Compared with the existing power supply mode of the power supply module, the method not only can intelligently determine the initial quantity of the starting power supply modules, but also can adaptively adjust the working quantity of the power supply modules in the formation/capacity-division process, so that the output power of the power supply in the formation/capacity-division equipment is always in a high-efficiency interval with the matching efficiency, the energy supply efficiency of the formation/capacity-division equipment is improved, the electric energy loss is reduced, and the energy conservation and the carbon reduction are realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a control method based on distributed energy supply requirements according to an embodiment of the present invention;
FIG. 2 is a flow chart of another control method based on distributed energy supply demand according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an adjusting flow of a working power module of a formation/capacity-division apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an efficiency curve of a forming/capacity-dividing apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a control system based on distributed energy supply requirements according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another distributed energy supply demand-based control system according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of a control system based on distributed energy supply requirements according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Compared with the existing power supply mode of the power supply module, the control system and the control method based on the distributed energy supply demand can intelligently determine the initial number of the starting power supply modules, adaptively adjust the working number of the power supply modules in the formation/capacity division process, improve the energy supply efficiency of formation/capacity division equipment, reduce the electric energy loss and realize energy conservation and carbon reduction.
Example 1
Referring to fig. 1, fig. 1 is a flow chart of a control method based on distributed energy supply requirements according to an embodiment of the invention. The control method based on the distributed energy supply requirement described in fig. 1 may be applied to a formation/capacity-dividing device (such as a formation/capacity-dividing integrated machine) in an automatic power battery production line, where the formation/capacity-dividing device includes a core controller (a central processor) and a plurality of power modules, and is configured to perform formation/capacity division on the battery cells through the corresponding power modules. Optionally, the method may be implemented by a control system, where the control system may be integrated in a formation/capacity-dividing device, or may be a local server or a cloud server for processing an energy supply adjustment procedure in a formation/capacity-dividing process, and the embodiment of the present invention is not limited. As shown in fig. 1, the control method based on the distributed energy supply demand may include the following operations:
101. And determining a process flow to be executed by the formation/capacity-division equipment according to a preset process file, and determining the initial number of power modules to be started according to the process flow.
In the embodiment of the invention, before the execution of the cell formation/capacity division operation, the initial number of power modules capable of normally starting the formation/capacity division operation of the formation/capacity division equipment is determined according to the requirement of the process flow to be executed on the electrical parameters, wherein the formation/capacity division equipment comprises a core controller (a central processing unit) and a plurality of power modules.
Optionally, the process flow to be executed includes a process flow corresponding to a constant-current charging/discharging stage, or includes a process flow corresponding to a constant-voltage charging/discharging stage.
Further, as an alternative embodiment, determining the initial number of power modules to be started according to the process steps includes:
according to the process steps, determining the charge/discharge requirement parameters required by the formation/capacity-dividing equipment for starting the battery cell formation/capacity-dividing operation;
and determining the initial number of the power modules to be started according to the charge/discharge demand parameters.
In this alternative embodiment, the charge/discharge demand parameters include charge/discharge current demand parameters for constant-current charge/discharge phases, or include charge/discharge voltage demand parameters for constant-voltage charge/discharge phases.
102. And starting a plurality of working power supply modules matched with the initial quantity from a plurality of power supply modules included in the formation/capacity-dividing equipment according to the process flow and the initial quantity, so that the formation/capacity-dividing equipment executes the cell formation/capacity-dividing operation according to the process flow.
In the embodiment of the invention, the formation/capacity-dividing equipment performs formation/capacity-dividing operation on the battery core needing formation/capacity-dividing through the determined working power supply module according to the process flow, wherein the power supply module which is not started is in a closed or dormant state.
103. In the process of executing the cell formation/capacity division operation, the working electric parameters of each working power supply module are monitored, and whether the power supply module adjustment operation is required to be executed is judged according to the working electric parameters of all the working power supply modules.
In the embodiment of the invention, namely in the process of executing the cell formation/capacity division operation, the working electric parameters of the started power supply modules are monitored, and the number of the started power supply modules is regulated and controlled in real time. Specifically, the power module adjusting operation is used for adjusting the number of power modules required to work, i.e. increasing the number of power modules required to work (such as starting the power module required to participate in the cell formation/capacity division operation from the power modules which are not started), or decreasing the number of power modules required to work (such as closing the power module not required to continue to participate in the cell formation/capacity division operation from the power modules which are started, or dormancy).
104. And when the judgment result is yes, executing the power module adjusting operation.
In the embodiment of the invention, when the power module adjustment operation is judged to be executed and the number of the power modules needing to be operated is required to be increased, the power module needing to participate in the cell formation/capacity division operation is newly started from the power modules which are not started, or when the power module adjustment operation is judged to be executed and the number of the power modules needing to be operated is required to be reduced, the power modules which do not need to continuously participate in the cell formation/capacity division operation are closed or dormant from all the working power modules.
Further, when it is determined that the power module adjustment operation is not required to be performed, the cell formation/capacity division operation is performed by the original plurality of working power modules based on the process flow.
Compared with the existing power supply mode (such as integrally opening/closing the power supply module), the embodiment of the invention can perform targeted opening control on the power supply module of the formation/capacity-dividing equipment based on the step file, and perform self-adaptive adjustment on the working quantity of the power supply module required to work in real time based on the working electric parameters of the working power supply module, thereby being beneficial to ensuring that the output power of the power supply in the formation/capacity-dividing equipment is always in a high-efficiency interval with the matching efficiency thereof, optimizing the power supply mode of the formation/capacity-dividing equipment, further improving the energy supply efficiency of the formation/capacity-dividing equipment, reducing the electric energy loss and realizing energy conservation and carbon reduction.
In an alternative embodiment, before determining the process flow to be executed by the forming/capacity-dividing apparatus according to the preset process file in the step 101, the method further includes:
acquiring cell parameters of a target cell which needs formation/capacity division;
determining a charging/discharging demand parameter corresponding to the target battery cell according to the battery cell parameter of the target battery cell;
and generating a step file of the formation/capacity-division equipment according to the charge/discharge demand parameters corresponding to the target battery cell.
In this optional embodiment, optionally, the cell parameters of the target cell include at least one of an electrolyte type parameter, an electrode material type parameter, a cell package type parameter, a membrane type parameter, a cell liquid inlet state parameter, and a test requirement parameter of the target cell, such as the target cell adopts a liquid electrolyte, a lithium iron phosphate electrode material, and the cell liquid inlet state is an open state, and so on.
Further optionally, the charge/discharge requirement parameters corresponding to the target battery cell include a charge/discharge requirement mode corresponding to the target battery cell and a target requirement parameter corresponding to the charge/discharge requirement mode, where the charge/discharge requirement mode includes a constant-current charge/discharge mode and/or a constant-voltage charge/discharge mode, and the target requirement parameter includes at least one of a charge/discharge time requirement parameter, a charge/discharge circuit requirement parameter, a charge/discharge protection requirement parameter, a shelf time requirement parameter, and a cycle requirement parameter, for example, the target battery cell needs to be charged at 0.3C for 1 hour in the constant-current charge/discharge mode, then is shelf for 30s and then is discharged at 0.3C for 1 hour, and the above steps are cycled for 50 times.
Therefore, the optional embodiment can intelligently determine the corresponding charging/discharging requirement parameters based on the cell parameters of the target cell, so that the process step file required by the formation/capacity-dividing equipment is generated, the formation/capacity-dividing equipment can reliably and accurately execute the cell formation/capacity-dividing operation based on the process step file, the formation/capacity-dividing equipment and the target cell can be effectively protected in the cell formation/capacity-dividing process, and the accurate formed/capacity-divided cell can be obtained, so that the normal use of the subsequent cell is facilitated.
In another optional embodiment, before determining the charge/discharge requirement parameter corresponding to the target cell according to the cell parameter of the target cell in the step above, the method further includes:
acquiring environmental parameters of formation/capacity-division environments of the target battery cell;
determining the formation/capacity-division influence condition of the formation/capacity-division environment on the target battery cell according to the environment parameters and the battery cell parameters;
determining the formation/capacity-division influence degree of the formation/capacity-division environment on the target cell according to the formation/capacity-division influence condition, and judging whether the formation/capacity-division influence degree is greater than or equal to a preset influence degree threshold;
And when the judgment result is yes, determining the charge/discharge demand parameters corresponding to the target battery cell according to the environment parameters and the battery cell parameters.
In this alternative embodiment, it is predicted whether the formation/capacity-division environment where the target cell is located will cause an excessive influence in the formation/capacity-division process, if so, the environmental parameters of the formation/capacity-division environment where the target cell is located need to be further combined to determine the charging/discharging requirement parameters corresponding to the target cell, so as to protect the target cell and the formation/capacity-division equipment, and accurately obtain the formed/capacity-divided cell.
Optionally, the environmental parameter includes at least one of a humidity environmental parameter, a temperature environmental parameter, and a pressure environmental parameter. Further optionally, the formation/volume-fraction influencing condition includes at least one of an electrolyte interface stability influencing condition, a cell sealability influencing condition, and a cell deformation influencing condition. Specifically, the formation capacity influence degree may be an absolute value corresponding to a negative influence degree of a negative influence condition in the formation/capacity influence condition.
Further, the method further comprises: and when the formation/capacity-division influence degree is judged to be smaller than the preset influence degree threshold, determining the charge/discharge demand parameters corresponding to the target battery cell according to the battery cell parameters. That is, the charging/discharging requirement parameters corresponding to the target battery cells are determined without further combining the environment parameters of the formation/capacity-division environment.
Therefore, the optional embodiment can intelligently analyze the formation/capacity-dividing environment of the target battery core, influence conditions caused in the formation/capacity-dividing process of the formation/capacity-dividing environment are further combined with environment parameters of the formation/capacity-dividing environment, and the charge/discharge requirement parameters corresponding to the target battery core are determined, so that the relevant influence conditions of the formation/capacity-dividing process of the target battery core can be comprehensively analyzed, the charge/discharge requirement parameters corresponding to the target battery core can be reliably and accurately determined based on the relevant influence conditions, and the follow-up generation of a step file required by the formation/capacity-dividing equipment based on the charge/discharge requirement parameters corresponding to the target battery core is facilitated.
Example two
Referring to fig. 2, fig. 2 is a flow chart of a control method based on distributed energy supply requirements according to an embodiment of the invention. The control method based on the distributed energy supply requirement described in fig. 2 may be applied to a formation/capacity-dividing device (such as a formation/capacity-dividing integrated machine) in a power battery automation line, where the formation/capacity-dividing device includes a core controller (a central processor) and a plurality of power modules, and is configured to perform formation/capacity division on the battery cells through the corresponding power modules. Optionally, the method may be implemented by a control system, where the control system may be integrated in a formation/capacity-dividing device, or may be a local server or a cloud server for processing an energy supply adjustment procedure in a formation/capacity-dividing process, and the embodiment of the present invention is not limited. As shown in fig. 2, the control method based on the distributed energy supply demand may include the following operations:
201. And determining a process flow to be executed by the formation/capacity-division equipment according to a preset process file.
202. Limiting electrical parameters of each power module are determined.
In an embodiment of the invention, wherein the limiting electrical parameter comprises a maximum output current parameter.
203. When the process flow to be executed comprises a process flow corresponding to the constant-current charging/discharging stage, determining charging/discharging current demand parameters aiming at the constant-current charging/discharging stage, and determining the initial number of the power modules to be started according to the maximum output current parameters and the charging/discharging current demand parameters of each power module.
In the embodiment of the present invention, for example, if it is determined that the charging/discharging current demand parameter for the constant current charging/discharging phase is 36A and the maximum output current parameter of each power module is 3A, it may be determined that the initial number of power modules to be started is at least 12.
204. When the process flow to be executed comprises a process flow corresponding to the constant-voltage charge/discharge stage, determining charge/discharge voltage demand parameters for the constant-voltage charge/discharge stage, and determining the initial number of power modules to be started according to the maximum output current parameter and the charge/discharge voltage demand parameters of each power module.
In the embodiment of the invention, specifically, based on a preset differential pressure current mapping table, starting current parameters corresponding to the charging/discharging voltage demand parameters can be matched from the differential pressure current mapping table, and then the initial number of the power modules to be started is determined according to the maximum output current parameters and the starting current parameters of each power module.
205. And starting a plurality of working power supply modules matched with the initial quantity from a plurality of power supply modules included in the formation/capacity-dividing equipment according to the process flow and the initial quantity, so that the formation/capacity-dividing equipment executes the cell formation/capacity-dividing operation according to the process flow.
206. In the process of executing the cell formation/capacity division operation, the working electric parameters of each working power supply module are monitored, and whether the power supply module adjustment operation is required to be executed is judged according to the working electric parameters of all the working power supply modules.
In an embodiment of the present invention, the operating electrical parameter of each operating power module includes an operating current parameter and an operating voltage parameter of the operating power module.
207. And when the judgment result is yes, executing the power module adjusting operation.
In the embodiment of the present invention, for other descriptions of step 201 and step 205-step 207, please refer to the detailed descriptions of step 101-step 104 in the first embodiment, and the description of the embodiment of the present invention is omitted.
Compared with the existing power supply mode of the power supply module, the embodiment of the invention can determine the initial number of the power supply modules to be started in a targeted manner based on the corresponding process steps of the specific charging/discharging stage, so that the initial number of the power supply modules can be reliably and accurately determined, further the formation/capacity-dividing equipment can reliably and accurately execute formation/capacity-dividing starting operation, and the energy utilization efficiency of the formation/capacity-dividing equipment can be optimized under the condition of ensuring normal formation/capacity-dividing starting.
In an alternative embodiment, determining the initial number of power modules to be started according to the maximum output current parameter and the charge/discharge voltage requirement parameter of each power module in step 204 includes:
acquiring tab voltage parameters of a target battery cell needing formation/capacity division;
determining a voltage difference between the tab voltage parameter and the charge/discharge voltage demand parameter according to the tab voltage parameter and the charge/discharge voltage demand parameter;
determining starting current parameters required by formation/capacity-division equipment from a pressure difference current mapping table according to a preset pressure difference current mapping table and a voltage difference value;
And determining the initial number of the power modules to be started according to the maximum output current parameter and the starting current parameter of each power module.
In this alternative embodiment, for example, when the voltage difference between the tab voltage parameter of the target battery cell and the charging/discharging voltage demand parameter is calculated to be 0.5V, at this time, the starting current parameter corresponding to the voltage difference of 0.5V may be determined to be 36A from the preset differential current mapping table, so that the initial number of power modules to be started is determined to be at least 12 according to the maximum output current parameter 3A and the starting current parameter 36A of each power module.
Therefore, in the constant voltage charging/discharging stage, the optional embodiment can determine the starting current parameter required by the formation/capacity-dividing device, which is matched with the voltage difference, based on the voltage difference between the tab voltage parameter of the target cell and the corresponding charging/discharging voltage demand parameter, so as to determine the initial number of power modules required to be started by the formation/capacity-dividing device. Compared with the existing power supply mode of the power supply module, the method can improve the reliability and the accuracy of formation/capacity-division starting operation of formation/capacity-division equipment, further reduce the occurrence of resource waste caused by starting too many power supply modules, and optimize the energy utilization efficiency of the formation/capacity-division equipment during starting.
In another alternative embodiment, the determining, in step 206, whether the power module adjustment operation needs to be performed according to the operating electrical parameters of all the operating power modules includes:
acquiring a preset efficiency curve of the formation/capacity-division equipment and energy efficiency demand parameters of the formation/capacity-division equipment, and determining a target efficiency range corresponding to the formation/capacity-division equipment from the efficiency curve according to the efficiency curve and the energy efficiency demand parameters;
calculating the sum of the working power parameters of all the working power modules according to the working current parameters and the corresponding working voltage parameters of each working power module;
determining the sum of the maximum output power parameters of all the working power supply modules, and determining the work load rate corresponding to all the working power supply modules according to the ratio between the sum of the working power parameters and the sum of the maximum output power parameters;
judging whether the workload rate is within a target efficiency range;
and when the judging result is negative, determining that the power module adjusting operation needs to be executed.
In this alternative embodiment, as shown in fig. 4, fig. 4 is a schematic diagram of an efficiency curve of a formation/capacity-division apparatus according to an embodiment of the present invention, where the efficiency curve of the formation/capacity-division apparatus represents a correspondence between a load rate and efficiency of the formation/capacity-division apparatus.
Specifically, based on fig. 3 (fig. 3 is a schematic diagram of an adjusting flow of a working power module of a formation/capacity-dividing device according to an embodiment of the present invention) and fig. 4, a process for determining whether to execute an adjusting operation of the power module may be exemplified as follows: firstly, obtaining an efficiency curve of the formation/capacity-division equipment shown in fig. 4, and dividing an inefficient area range (such as a shaded square area range in fig. 4) and a high-efficient area range (such as an unshaded square area range in fig. 4) from the efficiency curve according to energy efficiency demand parameters of the formation/capacity-division equipment, wherein the high-efficient area range is a target efficiency range corresponding to the formation/capacity-division equipment; then in the process of performing the second charge/discharge phase 0.3c=36a (as shown in fig. 3, and currents corresponding to full power of six modules of the formation/capacity-division device are 150A, currents corresponding to a single module are 150/6=25a), according to the calculated ratio between the sum of the working power parameters of the current six working power modules and the sum of the corresponding maximum output power parameters, it may be determined that the working load ratio corresponding to the six working power modules is 24% (the calculation process is 36/(25×6) ×100% =24%), at this time, it may be determined that the working load ratio is not within the high-efficiency area range, and further based on the determination result, the six working power modules may be adjusted to two or three working power modules, so that the original 24% working load ratio of the power modules is improved, and thus the power modules of the formation/capacity-division device may be operated from the "low-efficiency area" to the "high-efficiency area" as shown in fig. 4, so as to achieve energy efficiency optimization.
In summary, the workload rates for the various modules in FIG. 3 are calculated as follows:
the current corresponding to the full power of the six modules is 150A, and the current corresponding to the single module is 150/6=25A;
at 0.1C, the single module operating load rate=12/25=48%;
at 0.3C, the load rate of the two-module operation=36/(25×2) ×100% =72%; load rate of three module operation=36/(25×3) ×100% =48%;
at 0.7C, the load factor of five module operation=84/(25×5) ×100% =67.2%; load rate for six module operation = 84/(25 x 6) x100% = 56%;
at 1C, the load factor of six-module operation=120/(25×6) ×100% =80%.
It can be seen that, this alternative embodiment can determine the work load rate of the work power module based on the work electric parameter of the work power module monitored in real time, and then determine whether the work load rate is in the high-efficiency area range, so as to determine the adjustment operation of the power module. Compared with the existing power supply mode of the power supply module, the intelligent power supply module can intelligently judge whether the number of the power supply modules needing to work needs to be adjusted based on the work load rate of the work power supply modules, and further the number of the power supply modules needing to work can be reliably, accurately and effectively adjusted, so that the output power of the power supply of the formation/capacity-division equipment is always in a high-efficiency area range with the matching efficiency, the energy supply efficiency is improved, the electric energy loss is reduced, and the energy and the carbon are saved.
In yet another alternative embodiment, the performing the power module adjustment operation in step 207 includes:
when the work load rate is smaller than the minimum load rate in the target efficiency range, determining the required quantity of the first power supply modules of the formation/capacity-division equipment, and closing or dormancy work power supply modules matched with the first difference value parameters in all the work power supply modules according to the first difference value parameters between the initial quantity and the required quantity of the first power supply modules;
when the work load rate is larger than the maximum load rate in the target efficiency range, determining the required number of the second power modules of the formation/capacity-division equipment, and starting the power modules matched with the second difference parameters from all the power modules except all the work power modules according to the second difference parameters between the required number of the second power modules and the initial number.
In this alternative embodiment, when the work load rate is smaller than the minimum load rate in the target efficiency range, the work power module that does not need to continue to work is dormant/turned off, and when the work load rate is greater than the maximum load rate in the target efficiency range, the power module that needs to participate in the cell formation/capacity division work is newly started from the power modules that are not started.
It will be seen that this alternative embodiment enables targeted adjustments to be made to the power supply modules that are required to operate based on a comparison of the operating power supply module's operating load rate to a load rate threshold in a target efficiency range. Compared with the existing power supply mode of the power supply module, the power supply module which needs to work can be adaptively adjusted in real time, so that the energy supply efficiency of the formation/capacity-division equipment is improved, the electric energy loss of the formation/capacity-division equipment is reduced, and energy conservation and carbon reduction are achieved.
Example III
Referring to fig. 5, fig. 5 is a schematic structural diagram of a control system based on distributed energy supply requirements according to an embodiment of the present invention. As shown in fig. 5, the distributed energy supply demand-based control system may include:
a first determining module 301, configured to determine a process flow to be executed by the formation/capacity-dividing apparatus according to a preset process file;
a second determining module 302, configured to determine, according to a process step, an initial number of power modules that need to be started;
a starting module 303, configured to start a plurality of working power modules matched with the initial number from a plurality of power modules included in the formation/capacity-dividing apparatus according to the process flow and the initial number, so that the formation/capacity-dividing apparatus performs a core formation/capacity-dividing operation according to the process flow;
The monitoring module 304 is configured to monitor an operating electrical parameter of each operating power module during a process of performing a coring/capacity-separation operation;
a judging module 305, configured to judge whether to execute a power module adjustment operation according to the working electrical parameters of all the working power modules;
the adjusting module 306 is configured to execute the power module adjusting operation when the judging module 305 judges that the result is yes.
In the embodiment of the invention, the power module adjusting operation is used for adjusting the working quantity of the power module needing to work.
Compared with the existing power supply mode (such as integrally turning on/off the power supply modules), the control system based on the distributed energy supply requirement described in fig. 5 can perform targeted on control on the power supply modules of the formation/capacity-division equipment based on the step file, and perform adaptive adjustment on the number of the power supply modules required to work in real time based on the working electric parameters of the working power supply modules, so that the efficiency of matching the output power of the power supply in the formation/capacity-division equipment with the output power is always in a high efficiency interval, the power supply mode of the formation/capacity-division equipment is optimized, the energy supply efficiency of the formation/capacity-division equipment is further improved, and accordingly, the electric energy loss is reduced, and the energy conservation and the carbon reduction are realized.
In an alternative embodiment, the second determining module 302 determines, according to the process step, the initial number of power modules that need to be started specifically as follows:
determining a limiting electrical parameter of each power module; the limiting electrical parameter includes a maximum output current parameter;
when the process flow to be executed comprises a process flow corresponding to a constant-current charging/discharging stage, determining charging/discharging current demand parameters aiming at the constant-current charging/discharging stage, and determining the initial number of power modules to be started according to the maximum output current parameters and the charging/discharging current demand parameters of each power module;
when the process flow to be executed comprises a process flow corresponding to the constant-voltage charge/discharge stage, determining charge/discharge voltage demand parameters for the constant-voltage charge/discharge stage, and determining the initial number of power modules to be started according to the maximum output current parameter and the charge/discharge voltage demand parameters of each power module.
In this alternative embodiment, the process to be performed includes a process corresponding to a constant-current charge/discharge phase, or includes a process corresponding to a constant-voltage charge/discharge phase.
Therefore, compared with the existing power supply mode of the power supply module, the control system based on the distributed energy supply requirement described in fig. 5 can determine the initial number of the power supply modules to be started in a targeted manner based on the process steps corresponding to the specific charging/discharging stage, so that the initial number of the power supply modules can be reliably and accurately determined, and further the formation/capacity-dividing equipment can reliably and accurately perform formation/capacity-dividing starting operation, thereby being beneficial to optimizing the energy utilization efficiency of the formation/capacity-dividing equipment under the condition of ensuring normal formation/capacity-dividing starting.
In another alternative embodiment, the second determining module 302 determines the initial number of power modules to be started according to the maximum output current parameter and the charge/discharge voltage requirement parameter of each power module specifically as follows:
acquiring tab voltage parameters of a target battery cell needing formation/capacity division;
determining a voltage difference between the tab voltage parameter and the charge/discharge voltage demand parameter according to the tab voltage parameter and the charge/discharge voltage demand parameter;
determining starting current parameters required by formation/capacity-division equipment from a pressure difference current mapping table according to a preset pressure difference current mapping table and a voltage difference value;
and determining the initial number of the power modules to be started according to the maximum output current parameter and the starting current parameter of each power module.
Therefore, the control system based on the distributed energy supply requirement described in fig. 5 can determine the starting current parameters required by the formation/capacity-dividing device and matched with the voltage difference based on the tab voltage parameter of the target cell and the voltage difference between the corresponding charging/discharging voltage requirement parameters in the constant voltage charging/discharging stage, so as to determine the initial number of power modules required to be started by the formation/capacity-dividing device. Compared with the existing power supply mode of the power supply module, the method can improve the reliability and the accuracy of formation/capacity-division starting operation of formation/capacity-division equipment, further reduce the occurrence of resource waste caused by starting too many power supply modules, and optimize the energy utilization efficiency of the formation/capacity-division equipment during starting.
In yet another alternative embodiment, the determining module 305 determines, according to the operating electrical parameters of all the operating power modules, whether the power module adjustment operation needs to be performed specifically:
acquiring a preset efficiency curve of the formation/capacity-division equipment and energy efficiency demand parameters of the formation/capacity-division equipment, and determining a target efficiency range corresponding to the formation/capacity-division equipment from the efficiency curve according to the efficiency curve and the energy efficiency demand parameters;
calculating the sum of the working power parameters of all the working power modules according to the working current parameters and the corresponding working voltage parameters of each working power module;
determining the sum of the maximum output power parameters of all the working power supply modules, and determining the work load rate corresponding to all the working power supply modules according to the ratio between the sum of the working power parameters and the sum of the maximum output power parameters;
judging whether the workload rate is within a target efficiency range;
and when the judging result is negative, determining that the power module adjusting operation needs to be executed.
In this alternative embodiment, the operating electrical parameters of each operating power module include an operating current parameter and an operating voltage parameter of the operating power module; the efficiency curve of the formation/capacity-division apparatus represents a correspondence relationship between the load rate and the efficiency of the formation/capacity-division apparatus.
It can be seen that implementing the control system based on distributed energy supply requirements described in fig. 5 can determine the workload rate of the working power supply module based on the working electrical parameters of the working power supply module monitored in real time, and further determine whether the workload rate is within the efficient area range, so as to determine the adjustment operation of the power supply module. Compared with the existing power supply mode of the power supply module, the intelligent power supply module can intelligently judge whether the number of the power supply modules needing to work needs to be adjusted based on the work load rate of the work power supply modules, and further the number of the power supply modules needing to work can be reliably, accurately and effectively adjusted, so that the output power of the power supply of the formation/capacity-division equipment is always in a high-efficiency area range with the matching efficiency, the energy supply efficiency is improved, the electric energy loss is reduced, and the energy and the carbon are saved.
In yet another alternative embodiment, the adjustment module 306 performs the power module adjustment operation in a manner that is specifically:
when the work load rate is smaller than the minimum load rate in the target efficiency range, determining the required quantity of the first power supply modules of the formation/capacity-division equipment, and closing or dormancy work power supply modules matched with the first difference value parameters in all the work power supply modules according to the first difference value parameters between the initial quantity and the required quantity of the first power supply modules;
When the work load rate is larger than the maximum load rate in the target efficiency range, determining the required number of the second power modules of the formation/capacity-division equipment, and starting the power modules matched with the second difference parameters from all the power modules except all the work power modules according to the second difference parameters between the required number of the second power modules and the initial number.
It can be seen that implementing the distributed energy supply demand based control system described in fig. 5 enables targeted adjustments of the power supply modules that need to operate based on a comparison between the operating power supply module's workload rate and the load rate threshold in the target efficiency range. Compared with the existing power supply mode of the power supply module, the power supply module which needs to work can be adaptively adjusted in real time, so that the energy supply efficiency of the formation/capacity-division equipment is improved, the electric energy loss of the formation/capacity-division equipment is reduced, and energy conservation and carbon reduction are achieved.
In yet another alternative embodiment, the system further comprises:
an obtaining module 307, configured to obtain a cell parameter of a target cell that needs formation/capacity division before the first determining module 301 determines, according to a preset process step file, a process step flow to be executed by the formation/capacity division apparatus;
The first determining module 301 is further configured to determine a charge/discharge demand parameter corresponding to the target battery cell according to a battery cell parameter of the target battery cell;
the generating module 308 is configured to generate a step file of the formation/capacity-division device according to the charge/discharge requirement parameter corresponding to the target cell.
In this alternative embodiment, the cell parameters of the target cell include at least one of an electrolyte type parameter, an electrode material type parameter, a cell package type parameter, a diaphragm type parameter, a cell fill port status parameter, and a test requirement parameter of the target cell; the charge/discharge demand parameters corresponding to the target battery cells include a charge/discharge demand mode corresponding to the target battery cells and target demand parameters corresponding to the charge/discharge demand mode, wherein the charge/discharge demand mode includes a constant-current charge/discharge mode and/or a constant-voltage charge/discharge mode, and the target demand parameters include at least one of a charge/discharge time demand parameter, a charge/discharge circuit demand parameter, a charge/discharge protection demand parameter, a shelf time demand parameter and a cycle demand parameter.
Therefore, the control system based on the distributed energy supply requirement described in fig. 6 can intelligently determine the corresponding charging/discharging requirement parameters based on the cell parameters of the target cell, so as to generate the process step file required by the formation/capacity-dividing device, thus being beneficial to reliably and accurately executing the cell formation/capacity-dividing operation based on the process step file by the formation/capacity-dividing device, further being beneficial to effectively protecting the formation/capacity-dividing device and the target cell in the cell formation/capacity-dividing process, and being beneficial to obtaining the accurate formed/capacity-divided cell, thereby being beneficial to the normal use of the subsequent cell.
In yet another alternative embodiment, the obtaining module 307 is further configured to:
before the first determining module 301 determines the charge/discharge requirement parameter corresponding to the target battery cell according to the battery cell parameter of the target battery cell, acquiring the environment parameter of the formation/capacity-division environment where the target battery cell is located;
the first determining module 301 is further configured to determine a formation/capacity-division influence condition of the formation/capacity-division environment on the target battery cell according to the environmental parameter and the battery cell parameter;
the judging module 305 is further configured to judge whether the formation/capacity-division influence degree is greater than or equal to a preset influence degree threshold;
the first determining module 301 is further configured to determine, when the determination result of the determining module 305 is yes, a charge/discharge requirement parameter corresponding to the target cell according to the environmental parameter and the cell parameter.
In this alternative embodiment, the environmental parameter includes at least one of a humidity environmental parameter, a temperature environmental parameter, and a pressure environmental parameter; the formation/capacity-division influencing conditions comprise at least one of electrolyte interface stability influencing conditions, cell tightness influencing conditions and cell deformation influencing conditions; and determining the influence degree of the formation/capacity division environment on the formation/capacity division of the target cell according to the influence condition of the formation/capacity division.
Therefore, the control system based on the distributed energy supply requirement described in fig. 6 can intelligently analyze the formation/capacity-dividing environment of the target battery cell, influence conditions caused in the formation/capacity-dividing process of the formation/capacity-dividing environment are further combined with environment parameters of the formation/capacity-dividing environment, and the charge/discharge requirement parameters corresponding to the target battery cell are determined, so that the relevant influence conditions of the formation/capacity-dividing process of the target battery cell can be comprehensively analyzed, and the charge/discharge requirement parameters corresponding to the target battery cell can be reliably and accurately determined based on the relevant influence conditions, thereby being beneficial to reliably and accurately generating the step files required by the formation/capacity-dividing equipment based on the charge/discharge requirement parameters corresponding to the target battery cell.
Example IV
Referring to fig. 7, fig. 7 is a schematic structural diagram of a control system based on distributed energy supply requirements according to an embodiment of the present invention. As shown in fig. 7, the distributed energy supply demand-based control system may include:
a memory 401 storing executable program codes;
a processor 402 coupled with the memory 401;
the processor 402 invokes executable program codes stored in the memory 401 to perform the steps in the control method based on the distributed energy supply requirement described in the first or second embodiment of the present invention.
Example five
The embodiment of the invention discloses a computer storage medium which stores computer instructions for executing the steps in the control method based on distributed energy supply requirement described in the first or second embodiment of the invention when the computer instructions are called.
Example six
An embodiment of the present invention discloses a computer program product comprising a non-transitory computer readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform the steps of the distributed energy supply demand-based control method described in the first or second embodiment.
The system embodiments described above are merely illustrative, in which the modules illustrated as separate components may or may not be physically separate, and the components shown as modules may or may not be physical, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above detailed description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course by means of hardware. Based on such understanding, the foregoing technical solutions may be embodied essentially or in part in the form of a software product that may be stored in a computer-readable storage medium including Read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), one-time programmable Read-Only Memory (OTPROM), electrically erasable programmable Read-Only Memory (EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM) or other optical disc Memory, magnetic disc Memory, tape Memory, or any other medium that can be used for computer-readable carrying or storing data.
Finally, it should be noted that: the embodiment of the invention discloses a control system and a control method based on distributed energy supply requirements, which are disclosed by the embodiment of the invention only as a preferred embodiment of the invention, and are only used for illustrating the technical scheme of the invention, but not limiting the technical scheme; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme recorded in the various embodiments can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (9)
1. A control system based on distributed energy supply demand, the system comprising:
the first determining module is used for determining a process flow to be executed by the formation/capacity-division equipment according to a preset process file; the process flow to be executed comprises a process flow corresponding to a constant-current charging/discharging stage, or comprises a process flow corresponding to a constant-voltage charging/discharging stage;
the second determining module is used for determining the initial number of the power modules to be started according to the process steps;
The starting module is used for starting a plurality of working power supply modules matched with the initial quantity from a plurality of power supply modules included in the formation/capacity-dividing equipment according to the process flow and the initial quantity, so that the formation/capacity-dividing equipment can execute cell formation/capacity-dividing operation according to the process flow;
the monitoring module is used for monitoring the working electric parameters of each working power supply module in the process of executing the cell formation/capacity division operation;
the judging module is used for judging whether the power supply module adjusting operation is required to be executed according to the working electric parameters of all the working power supply modules; the power supply module adjusting operation is used for adjusting the working quantity of the power supply modules needing to work;
the adjusting module is used for executing the power supply module adjusting operation when the judging result of the judging module is yes;
the second determining module determines, according to the process step flow, the initial number of power modules to be started specifically as follows:
determining a limiting electrical parameter of each of the power modules; the limiting electrical parameter comprises a maximum output current parameter;
when the process flow to be executed comprises a process flow corresponding to the constant-current charging/discharging stage, determining charging/discharging current demand parameters aiming at the constant-current charging/discharging stage, and determining the initial number of power modules to be started according to the maximum output current parameters of each power module and the charging/discharging current demand parameters;
When the process flow to be executed includes a process flow corresponding to the constant voltage charging/discharging stage, determining charging/discharging voltage demand parameters for the constant voltage charging/discharging stage, and determining the initial number of power modules to be started according to the maximum output current parameter of each power module and the charging/discharging voltage demand parameters.
2. The distributed energy supply demand-based control system according to claim 1, wherein the second determining module determines the initial number of power modules to be started according to the maximum output current parameter of each power module and the charge/discharge voltage demand parameter by:
acquiring tab voltage parameters of a target battery cell needing formation/capacity division;
determining a voltage difference between the tab voltage parameter and the charge/discharge voltage demand parameter according to the tab voltage parameter and the charge/discharge voltage demand parameter;
determining starting current parameters required by the formation/capacity-division equipment from a preset differential pressure current mapping table according to the differential pressure current mapping table and the voltage difference value;
and determining the initial number of the power modules to be started according to the maximum output current parameter and the starting current parameter of each power module.
3. The distributed energy supply demand-based control system of claim 1 or 2, wherein the operating electrical parameters of each operating power module include an operating current parameter and an operating voltage parameter of the operating power module;
the judging module judges whether the power supply module adjusting operation needs to be executed according to all the working electric parameters of the working power supply module, and the mode specifically comprises the following steps:
acquiring a preset efficiency curve of the formation/capacity-division equipment and energy efficiency demand parameters of the formation/capacity-division equipment, and determining a target efficiency range corresponding to the formation/capacity-division equipment from the efficiency curve according to the efficiency curve and the energy efficiency demand parameters; the efficiency curve of the formation/capacity-division equipment represents the corresponding relation between the load rate and the efficiency of the formation/capacity-division equipment;
calculating the sum of the working power parameters of all the working power modules according to the working current parameters and the corresponding working voltage parameters of each working power module;
determining the sum of the maximum output power parameters of all the working power supply modules, and determining the work load rates corresponding to all the working power supply modules according to the ratio between the sum of the working power parameters and the sum of the maximum output power parameters;
Judging whether the workload rate is within the target efficiency range;
and when the judging result is negative, determining that the power module adjusting operation needs to be executed.
4. The distributed energy supply demand-based control system of claim 3, wherein the adjustment module performs the power module adjustment operation in a manner that:
when the work load rate is smaller than the minimum load rate in the target efficiency range, determining the first power module demand quantity of the formation/capacity-division equipment, and closing or dormancy work power modules matched with the first difference parameter in all the work power modules according to the first difference parameter between the initial quantity and the first power module demand quantity;
and when the work load rate is larger than the maximum load rate in the target efficiency range, determining the required number of second power modules of the formation/capacity-division equipment, and starting the power modules matched with the second difference parameters from all the power modules except all the work power modules according to the second difference parameters between the required number of the second power modules and the initial number.
5. The distributed energy supply demand-based control system of claim 1, further comprising:
the acquisition module is used for acquiring the cell parameters of the target cell needing formation/capacity division before the first determination module determines the process flow to be executed by the formation/capacity division equipment according to the preset process file; the battery cell parameters of the target battery cell comprise at least one of electrolyte type parameters, electrode material type parameters, battery cell packaging type parameters, diaphragm type parameters, battery cell liquid injection port state parameters and test requirement parameters of the target battery cell;
the first determining module is further configured to determine a charge/discharge demand parameter corresponding to the target battery cell according to a battery cell parameter of the target battery cell; the charge/discharge demand parameters corresponding to the target battery cells comprise charge/discharge demand modes corresponding to the target battery cells and target demand parameters aiming at the charge/discharge demand modes, the charge/discharge demand modes comprise constant-current charge/discharge modes and/or constant-voltage charge/discharge modes, and the target demand parameters comprise at least one of charge/discharge time demand parameters, charge/discharge circuit demand parameters, charge/discharge protection demand parameters, shelf time demand parameters and circulation demand parameters;
And the generating module is used for generating a step file of the formation/capacity-division equipment according to the charge/discharge demand parameters corresponding to the target battery cell.
6. The distributed energy supply demand-based control system of claim 5, wherein the acquisition module is further configured to:
acquiring environmental parameters of a formation/capacity-division environment in which the target battery cell is positioned before the first determination module determines the charge/discharge demand parameters corresponding to the target battery cell according to the battery cell parameters of the target battery cell; the environmental parameters include at least one of humidity environmental parameters, temperature environmental parameters, and pressure environmental parameters;
the first determining module is further configured to determine a formation/capacity-division influence condition of the formation/capacity-division environment on the target battery cell according to the environmental parameter and the battery cell parameter; the formation/capacity-division influence condition comprises at least one of electrolyte interface stability influence condition, cell tightness influence condition and cell deformation influence condition; determining the influence degree of the formation/capacity division environment on the target cell according to the influence condition of the formation/capacity division;
The judging module is further used for judging whether the formation/capacity-division influence degree is greater than or equal to a preset influence degree threshold value;
and the first determining module is further configured to determine a charge/discharge demand parameter corresponding to the target battery cell according to the environmental parameter and the battery cell parameter when the judging result of the judging module is yes.
7. A control method based on distributed energy supply demand, the method comprising:
determining a process flow to be executed by the formation/capacity-division equipment according to a preset process file, and determining the initial number of power modules to be started according to the process flow; the process flow to be executed comprises a process flow corresponding to a constant-current charging/discharging stage, or comprises a process flow corresponding to a constant-voltage charging/discharging stage;
starting a plurality of working power supply modules matched with the initial number from a plurality of power supply modules included in the formation/capacity-dividing equipment according to the process flow and the initial number, so that the formation/capacity-dividing equipment executes electric core formation/capacity-dividing operation according to the process flow;
monitoring the working electric parameters of each working power supply module in the process of executing the cell formation/capacity division operation, and judging whether the power supply module adjustment operation is required to be executed according to the working electric parameters of all the working power supply modules; the power supply module adjusting operation is used for adjusting the working quantity of the power supply modules needing to work;
When the judgment result is yes, executing the power module adjusting operation;
wherein, according to the process flow, determining the initial number of the power modules to be started includes:
determining a limiting electrical parameter of each of the power modules; the limiting electrical parameter comprises a maximum output current parameter;
when the process flow to be executed comprises a process flow corresponding to the constant-current charging/discharging stage, determining charging/discharging current demand parameters aiming at the constant-current charging/discharging stage, and determining the initial number of power modules to be started according to the maximum output current parameters of each power module and the charging/discharging current demand parameters;
when the process flow to be executed includes a process flow corresponding to the constant voltage charging/discharging stage, determining charging/discharging voltage demand parameters for the constant voltage charging/discharging stage, and determining the initial number of power modules to be started according to the maximum output current parameter of each power module and the charging/discharging voltage demand parameters.
8. A control system based on distributed energy supply demand, the system comprising:
A memory storing executable program code;
a processor coupled to the memory;
the processor invokes the executable program code stored in the memory to perform the distributed energy supply demand-based control method of claim 7.
9. A computer storage medium storing computer instructions which, when invoked, are operable to perform the distributed energy supply demand-based control method of claim 7.
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| CN117317422B (en) * | 2023-11-29 | 2024-03-15 | 深圳和润达科技有限公司 | Energy regulation and control method and device for lithium battery cell formation |
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