CN117607516A - High-voltage distributed chemical composition testing system - Google Patents
High-voltage distributed chemical composition testing system Download PDFInfo
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- CN117607516A CN117607516A CN202311553561.XA CN202311553561A CN117607516A CN 117607516 A CN117607516 A CN 117607516A CN 202311553561 A CN202311553561 A CN 202311553561A CN 117607516 A CN117607516 A CN 117607516A
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- 238000012360 testing method Methods 0.000 title claims abstract description 66
- 239000000126 substance Substances 0.000 title claims abstract description 21
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 71
- 238000004519 manufacturing process Methods 0.000 claims abstract description 55
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 238000004146 energy storage Methods 0.000 claims description 70
- 238000010248 power generation Methods 0.000 claims description 48
- 238000009826 distribution Methods 0.000 claims description 47
- 238000003860 storage Methods 0.000 claims description 37
- 230000002457 bidirectional effect Effects 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 16
- 230000002159 abnormal effect Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 claims description 5
- 210000004027 cell Anatomy 0.000 description 50
- 230000008901 benefit Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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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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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of battery production and manufacturing, and discloses a high-voltage distributed chemical composition testing system, which comprises the following components: the system comprises an electronic system, a direct current bus and a formation component testing cabinet, wherein the formation component testing cabinet comprises a formation cabinet and a separation cabinet, each of which comprises a plurality of library positions, and each library position comprises a plurality of DC/DC power supplies and a plurality of electric cores; the input end of each DC/DC power supply is connected with the direct current bus after being connected, and the output end of each DC/DC power supply is connected with one battery cell in series to form a power supply battery cell series branch; the DC bus is used for supplying power to a plurality of DC/DC power supplies after DC conversion of the electric energy of the power supply system, and the DC/DC power supplies are used for carrying out charge and discharge tests on the battery cells. According to the invention, the DC/DC power supply independently performs charge and discharge tests for each battery cell, and the input end of each DC/DC power supply is connected with the direct current bus, so that the voltage difference between the input end and the output end of the DC/DC power supply is reduced.
Description
Technical Field
The invention relates to the technical field of battery production and manufacturing, in particular to a high-voltage distributed chemical composition testing system.
Background
The battery cell back-end component production test is a high energy consumption link in the battery cell production process, and the traditional battery cell component production test system adopts a distributed AC/DC power supply and DC/DC power supply scheme, and has the following defects:
1. when the high-voltage direct-current bus scheme is adopted, the input and output voltage difference of the DC/DC power supply is larger, the switching tube is difficult to select, the switching loss is large, and the energy conversion efficiency is low.
2. The traditional series formation component test scheme adopts a DC/DC power supply to test a plurality of series battery cells simultaneously, and the scheme can reduce the input and output voltage difference of the DC/DC power supply and improve the charge and discharge conversion efficiency of the system, but also has the problem that the charge and discharge voltage of a single battery cell is uncontrollable, so that the produced battery cells have poor consistency.
3. The traditional electricity for battery cell formation and capacity test mainly comes from a power grid, new energy power generation resources such as photovoltaic power generation and wind power generation are not fully utilized, the problems of high electricity consumption and high production cost for battery cell production exist, and the development requirements of energy conservation and emission reduction are not met.
4. The traditional scheme of the battery cell formation component test system is not added with an energy storage system, so that the residual energy on a direct current bus cannot be stored, the peak Gu Jiacha of the factory production electricity consumption can be regulated, and when the production capacity of the production line is large, the high-power charging and discharging of the system can generate certain impact on the local power grid, so that the stability of the factory load electricity consumption is affected.
DC/DC power supply parallel connection in the traditional cell formation and capacity-division production test system leads to larger input and output voltage difference of the DC/DC power supply, single cell charge and discharge voltage is uncontrollable, so that produced cells have poor consistency, internal cyclic utilization of charge and discharge energy between different cell positions in a formation and capacity-division cabinet and among cabinets cannot be realized, the charge and discharge energy conversion efficiency is low, and the electricity consumption for production is large.
Disclosure of Invention
In view of this, the present invention provides a high-voltage distributed chemical composition testing system to solve the problem of large input-output voltage difference and low charge-discharge energy conversion efficiency when a DC/DC power supply is connected in parallel to a high-voltage DC bus.
The invention provides a high-voltage distributed chemical composition testing system, which comprises: the system comprises an electronic system, a direct current bus and a formation component testing cabinet, wherein the formation component testing cabinet comprises a formation cabinet and a separation cabinet, each of which comprises a plurality of library positions, and each library position comprises a plurality of DC/DC power supplies and a plurality of electric cores;
the electronic system is connected with the direct current bus, the input end of each DC/DC power supply is connected with the direct current bus after being connected, and the output end of each DC/DC power supply is connected with one battery cell in series to form a power supply battery cell series branch;
the DC bus is used for supplying power to a plurality of DC/DC power supplies after DC conversion of the electric energy of the power supply system, and the DC/DC power supplies are used for carrying out charge and discharge tests on the battery cells.
The invention provides a high-voltage distributed component analysis test system, wherein a power supply system is connected with a direct current bus, the input end of each DC/DC power supply is connected with the direct current bus after being connected, and the output end of each DC/DC power supply is connected with a battery core in series to form a power supply battery core series branch; the DC bus is used for supplying power to the plurality of DC/DC power supplies after DC conversion is carried out on electric energy of the power supply system, the DC/DC power supplies are used for carrying out charge and discharge tests on the battery cores, the purpose that the DC/DC power supplies independently carry out the charge and discharge tests on each battery core is achieved, the input end of each DC/DC power supply is connected with the DC bus after being connected, the voltage difference between the input end and the output end of the DC/DC power supply is reduced, the switching loss of the DC/DC power supply is reduced, the DC/DC power supply conversion efficiency is improved, and the problems that the input and output voltage difference is large and the charge and discharge energy conversion efficiency is low when the DC/DC power supplies are connected in parallel to the high-voltage DC bus are solved.
In an alternative embodiment, the system further comprises a DC power switch connected between the DC bus and the input of the plurality of DC/DC power sources;
the DC power switch is used to open or close the connection between the DC bus and the input of the plurality of DC/DC power sources.
In an alternative embodiment, the formation and capacity separation cabinets further comprise a bank bypass switch and a channel bypass switch;
each power supply cell series branch is connected with one end of a channel bypass switch, the other end of the channel bypass switch is connected with one end of a library position bypass switch, and the other end of the library position bypass switch is connected with a direct current bus through a direct current power switch;
the channel bypass switch is used for bypassing the power supply cell serial branch circuit where the cell or the DC/DC power supply is positioned when the cell or the DC/DC power supply in the power supply cell serial branch circuit is abnormal;
the storage position bypass switch is used for disconnecting the storage position or the formation cabinet or the capacity-dividing cabinet where the storage position is located from the corresponding connected direct current switch when the storage position or the formation cabinet where the storage position is located or the capacity-dividing cabinet input side where the storage position is located has positive and negative short circuit or needs to be shut down for maintenance.
In an alternative embodiment, the formation cabinet is used for charging, discharging and storing electric quantity of the battery cells;
the capacity-dividing cabinet is used for grouping and managing the battery cells.
The high-voltage distributed formation component testing system provided by the invention is characterized in that the channel bypass switch is used for bypassing a power supply cell serial branch circuit where a cell or a DC/DC power supply is positioned when the cell or the DC/DC power supply in the power supply cell serial branch circuit is abnormal; the storage position bypass switch is used for disconnecting the storage position or the formation cabinet where the storage position is located or the capacity-dividing cabinet where the storage position is located from the direct current switch correspondingly connected when the storage position or the formation cabinet where the storage position is located or the input side of the capacity-dividing cabinet where the storage position is located is in positive-negative short connection or is required to be shut down for maintenance, and the direct current power switch, the storage position bypass switch and the channel bypass switch are matched for use, so that the normal operation of the system is maintained, and meanwhile, the safety of the system is improved.
In an alternative embodiment, the system further comprises an ac bus and a bi-directional grid inverter comprising an ac power distribution cabinet, an energy storage converter and a first dc power distribution cabinet;
the input end of the alternating current power distribution cabinet is connected with an alternating current bus, the output end of the alternating current power distribution cabinet is connected with the input end of the energy storage converter, the output end of the energy storage converter is connected with the input end of the first direct current power distribution cabinet, and the output end of the first direct current power distribution cabinet is connected with the direct current bus.
In an alternative embodiment, the energy storage converter is used for working in a direct current control network state when the power supply of the power supply system reaches a demand threshold value, and the energy storage converter feeds the unused residual electric quantity of the power supply system back to the power grid through a direct current bus under the direct current control network state;
or the energy storage converter is used for working in an alternating current control grid state when the frequency or amplitude of the power grid voltage fluctuates by a preset amplitude, and performing frequency modulation and voltage regulation control on the power grid voltage when the alternating current control grid state and the power supply of the power supply system reach a demand threshold;
or the energy storage converter is used for abnormal power failure of the power grid and works in a standby state when the power supply of the power supply system does not reach the requirement threshold.
According to the high-voltage distributed component analysis test system provided by the invention, the energy storage converter in the bidirectional grid-structured inverter is used for working in a direct current control grid-structured state when the power supply of the power supply system reaches a required threshold value, and the energy storage converter feeds the unused residual electric quantity of the power supply system back to the power grid through the direct current bus in the direct current control grid-structured state, so that peak-shifting power utilization is realized while alternating current load power utilization is reduced, and the income sources are increased in modes of peak-shifting power utilization, power selling and the like, thereby improving the economic benefit. Or the energy storage converter is used for working in an alternating current control network state when the frequency or amplitude of the power grid voltage fluctuates by a preset amplitude, modulating and regulating the voltage of the power grid when the alternating current control network state and the power supply of the power supply system reach a demand threshold value, modulating and regulating the voltage of the power grid by the energy storage converter, stabilizing the power consumption of alternating current loads of a factory, and increasing the income sources by participating in the power grid modulating and regulating scheduling and the like. Or the energy storage converter is used for abnormal power failure of the power grid, works in a standby state when the power supply of the power supply system does not reach a demand threshold, reduces the power consumption of the bidirectional grid-structured inverter, ensures that the partial-division cabinet and the partial-capacity cabinet production line continue to normally operate, and achieves the purpose that the partial production line can normally produce under abnormal conditions.
In an alternative embodiment, the system further comprises an energy storage subsystem, wherein the energy storage subsystem is connected with the power supply system in parallel, the energy storage subsystem comprises an energy storage container, a first DC/DC converter and a second DC power distribution cabinet, and the energy storage container, the first DC/DC converter and the second DC power distribution cabinet are connected with the DC bus after being connected in sequence;
the energy storage subsystem is used for recovering unused residual electric quantity stored on the direct current bus and participating in peak clipping and valley filling work in a set peak-valley electricity price period.
The high-voltage distributed chemical composition testing system provided by the invention has the advantages that the energy storage subsystem not only can recover the residual energy stored on the direct-current bus, but also can realize peak shifting and power utilization of the power load for factory production by setting the peak-valley power price period, and the power consumption cost for production is reduced.
In an alternative embodiment, the system further comprises a production logistics management subsystem, the production logistics management subsystem being communicatively connected to the formation and capacity-dividing cabinets, respectively;
the production logistics management subsystem is used for predicting the production test electricity demand of each bin in the formation cabinet and the capacity-division cabinet in real time, and controlling the charging and discharging of a plurality of bins in the formation cabinet and the capacity-division cabinet to be carried out simultaneously by adjusting the warehousing time interval of the bins, so that the formation cabinet and the capacity-division cabinet realize internal energy circulation.
The high-voltage distributed formation component testing system provided by the invention is used for predicting the production test electricity demand of each storage position in the formation cabinet and the separation cabinet in real time, and controlling the charging and discharging of a plurality of storage positions in the formation cabinet and the separation cabinet by adjusting the storage time interval of the storage positions, so that the formation cabinet and the separation cabinet realize internal energy circulation, and the optimal circulation control of energy among the charging and discharging storage positions, the formation cabinet and the separation cabinet is realized, and the purposes of energy saving and efficiency improvement are realized.
In an alternative embodiment, the system further comprises an energy efficiency management subsystem, which is in communication connection with the production logistics management subsystem, the bi-directional grid inverter, the energy storage subsystem and the power supply subsystem, respectively;
the energy efficiency management subsystem is used for predicting the generated energy of the power supply system, and carrying out energy efficiency management and scheduling on the power consumption of the bidirectional grid-built inverter, the energy storage subsystem and the power generation of the power supply system according to the predicted generated energy result and the production test power demand result of each bin output by the production logistics management subsystem.
The high-voltage distributed chemical composition testing system provided by the invention has the advantages that the energy efficiency management subsystem is used for predicting the generated energy of the power supply system, the energy efficiency management scheduling is carried out on the power consumption of the bidirectional grid inverter, the energy storage subsystem and the power generation of the power supply system according to the generated energy prediction result and the production test power demand result of each bin output by the production logistics management subsystem, the running state of each device of the system can be monitored in real time, and the aim of always keeping the optimal real-time energy efficiency running of the system is realized through the energy efficiency management scheduling of the subsystem.
In an alternative embodiment, the power supply system includes a power generation module, an AC/DC converter, a second DC/DC converter, and a third DC power distribution cabinet;
the power generation module, the AC/DC converter and the third direct current power distribution cabinet are sequentially connected and then connected with the direct current bus; the AC/DC converter converts alternating current of the power generation module into direct current and supplies power to the direct current bus through a third direct current power distribution cabinet;
and/or the number of the groups of groups,
the power generation module, the second DC/DC converter and the third DC power distribution cabinet are sequentially connected and then connected with the DC bus; the second DC/DC converter performs direct current conversion on the electric energy of the power generation module and supplies power to the direct current bus through the third direct current power distribution cabinet.
The invention provides a high-voltage distributed chemical composition testing system, which is characterized in that a power generation module, an AC/DC converter and a third DC power distribution cabinet are sequentially connected and then connected with a DC bus; the AC/DC converter converts alternating current of the power generation module into direct current and supplies power to the direct current bus through the third direct current power distribution cabinet, or the power generation module, the second DC/DC converter and the third direct current power distribution cabinet are connected in sequence and then connected with the direct current bus; the second DC/DC converter performs direct current conversion on the electric energy of the power generation module, and then supplies power to the direct current bus through the third direct current power distribution cabinet, so that the electric energy consumption for producing the battery cell is reduced to the maximum extent, and the purpose of construction of a zero-carbon factory is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a high voltage distributed chemical composition testing system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another high voltage distributed chemical composition testing system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a further high voltage distributed chemical composition testing system according to an embodiment of the present invention;
FIG. 4 is a diagram of a connection of a formation enclosure, a capacity-dividing enclosure, and a multi-stage bypass switch to a DC bus according to an embodiment of the invention;
FIG. 5 is a flowchart of the operation of a high voltage distributed chemical composition testing system according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. 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.
In this embodiment, a high-voltage distributed chemical composition testing system is provided, and fig. 1 is a schematic structural diagram of a high-voltage distributed chemical composition testing system according to an embodiment of the present invention, as shown in fig. 1, the system includes: the system comprises an electronic system, a direct current bus and a formation component testing cabinet, wherein the formation component testing cabinet comprises a formation cabinet and a separation cabinet, each of which comprises a plurality of library positions, and each library position comprises a plurality of DC/DC power supplies and a plurality of electric cores; the electronic system is connected with the direct current bus, the input end of each DC/DC power supply is connected with the direct current bus after being connected, and the output end of each DC/DC power supply is connected with one battery cell in series to form a power supply battery cell series branch; the DC bus is used for supplying power to a plurality of DC/DC power supplies after DC conversion of the electric energy of the power supply system, and the DC/DC power supplies are used for carrying out charge and discharge tests on the battery cells.
Specifically, the high-voltage input sides of the DC/DC power supplies corresponding to each channel (each channel corresponds to a power supply cell serial branch) in the formation cabinet and the storage position of the capacity-division cabinet are electrically connected in series, so that the voltage of the input end of each DC/DC power supply is 1/N of the voltage of the direct-current bus, wherein N is the number of the DC/DC power supplies in each storage position. For example, the voltage of the direct current bus is 700V, the number of the DC/DC power supplies in each bin is 24, and then the input voltage of each DC/DC power supply is about 29V, compared with the prior art, when each DC/DC power supply is directly connected with the direct current bus in parallel, the input voltage of the DC/DC power supply is about 700V, the switching voltage drop of the input end and the output end of the DC/DC power supply is greatly reduced, the switching loss of the power supply is reduced, and the charge-discharge conversion efficiency of the charge-discharge test of the DC/DC power supply in the formation cabinet and the capacity-division cabinet for the battery cell is improved.
As shown in fig. 2 and 4, the high-voltage distributed chemical component testing system provided in this embodiment further includes a DC power switch, where the DC power switch is connected between the DC bus and the input terminals of the DC/DC power sources; the DC power switch is used to open or close the connection between the DC bus and the input of the plurality of DC/DC power sources. As shown in fig. 4, the formation cabinet and the capacity-division cabinet further include a bank bypass switch and a channel bypass switch; each power supply cell series branch is connected with one end of a channel bypass switch, the other end of the channel bypass switch is connected with one end of a library position bypass switch, and the other end of the library position bypass switch is connected with a direct current bus through a direct current power switch; the channel bypass switch is used for bypassing the power supply cell serial branch circuit where the cell or the DC/DC power supply is positioned when the cell or the DC/DC power supply in the power supply cell serial branch circuit is abnormal; the storage position bypass switch is used for disconnecting the storage position or the formation cabinet or the capacity-dividing cabinet where the storage position is located from the corresponding connected direct current switch when the storage position or the formation cabinet where the storage position is located or the capacity-dividing cabinet input side where the storage position is located has positive and negative short circuit or needs to be shut down for maintenance.
Specifically, the channel bypass switch is normally in an open state, when an abnormality of the single-channel battery cell or the DC/DC power supply is detected, the channel bypass switch of the corresponding channel is closed, and the corresponding power supply battery cell serial branch in the channel is bypassed, so that the battery cells in other channels of the library can continue to normally test and operate. The direct current power switch connected with the direct current bus is normally in a closed state, and when the positive and negative short circuit occurs on the input side of the library position or the formation cabinet or the separation cabinet or the shutdown maintenance is needed, the library position bypass switch corresponding to the library position or the formation cabinet or the direct current switch connected with the direct current bus is rapidly disconnected, so that the normal operation of other cabinets and the library positions of the system is maintained, and the safety of the system is improved. The formation cabinet is used for charging, discharging and storing electric quantity of the battery core; the capacity-dividing cabinet is used for grouping and managing the battery cells.
As shown in fig. 3, the high-voltage distributed chemical composition testing system provided in this embodiment further includes an ac bus and a bidirectional network inverter, where the bidirectional network inverter includes an ac power distribution cabinet, an energy storage converter (Power Conversion System, PCS) and a first dc power distribution cabinet; the input end of the alternating current power distribution cabinet is connected with an alternating current bus, the output end of the alternating current power distribution cabinet is connected with the input end of the energy storage converter, the output end of the energy storage converter is connected with the input end of the first direct current power distribution cabinet, and the output end of the first direct current power distribution cabinet is connected with the direct current bus. The alternating current power distribution cabinet and the energy storage converters (Power Conversion System, PCS) are multiple, and one alternating current power distribution cabinet corresponds to one energy storage converter. The bidirectional network inverter can be realized by adopting a centralized high-power bidirectional network inverter.
As shown in fig. 3, the high-voltage distributed chemical composition testing system provided in this embodiment further includes an energy storage subsystem, the energy storage subsystem is connected in parallel with the power supply system, the energy storage subsystem includes an energy storage container, a first DC/DC converter and a second DC power distribution cabinet, and the energy storage container, the first DC/DC converter and the second DC power distribution cabinet are connected in sequence and then connected with the DC bus; the energy storage subsystem is used for recovering unused residual electric quantity stored on the direct current bus and participating in peak clipping and valley filling work in a set peak-valley electricity price period. The energy storage subsystem not only can recycle and store the residual energy on the direct current bus, but also can realize the peak-shifting power utilization of the power utilization load for the production of the battery cells in the factory by setting the peak-valley power price time period, and reduce the power utilization cost for the production.
As shown in fig. 3, the power supply system includes a power generation module, an AC/DC converter, a second DC/DC converter, and a third direct current power distribution cabinet; the power generation module, the AC/DC converter and the third direct current power distribution cabinet are sequentially connected and then connected with the direct current bus; the AC/DC converter converts alternating current of the power generation module into direct current and supplies power to the direct current bus through the third direct current power distribution cabinet.
When the power generation module adopts a photovoltaic power generation module, the second DC/DC converter and the third DC power distribution cabinet are connected in sequence and then connected with the DC bus; and the second DC/DC converter performs direct current conversion on the electric energy of the photovoltaic power generation module and supplies power to the direct current bus through a third direct current power distribution cabinet.
When the power generation module adopts new energy power generation subsystems such as wind power generation and the like, the new energy power generation subsystem, the second DC/DC converter and the third DC power distribution cabinet are connected in sequence and then connected with the DC bus; the second DC/DC converter performs direct current conversion on the electric energy of the new energy power generation subsystem and supplies power to the direct current bus through the third direct current power distribution cabinet.
The energy storage converter is used for working in a direct current control network configuration state when the power supply of the power supply system reaches a demand threshold value, and feeding unused residual electric quantity of the power supply system back to the power grid through a direct current bus under the direct current control network configuration state; specifically, when the power supply system adopts a new energy power generation subsystem (the new energy power generation subsystem comprises but is not limited to a novel clean energy power generation device such as wind power generation and photovoltaic power generation) to generate power and the energy supply of the energy storage subsystem is sufficient, namely, the power supply quantity reaches the power consumption requirement, the energy storage converter can feed the residual energy on the direct current bus to a factory power grid (the factory power grid refers to the power grid where the factory where the electric core is produced) when the power supply system adopts a new energy power generation subsystem (the new energy power generation subsystem comprises but is not limited to a novel clean energy power generation device such as wind power generation and photovoltaic power generation) in a direct current network mode (the factory power grid refers to the power grid where the factory where the electric core is produced), so that the power consumption of the factory alternating load is reduced, and meanwhile, the profit sources can be increased through modes such as peak-staggering power consumption and electricity selling, and the economic benefit is improved.
The energy storage converter is used for working in an alternating current network control state when the frequency or amplitude of the power grid voltage fluctuates by a preset amplitude, and performing frequency modulation and voltage regulation control on the power grid voltage when the alternating current network control state and the power supply of the power supply system reach a required threshold; specifically, when the power supply system adopts a new energy power generation subsystem to generate power and the energy storage subsystem supplies energy sufficiently, the energy storage converter can adaptively adjust and output the active power and the reactive power according to the detected power grid voltage frequency and amplitude and the difference between the rated power grid voltage frequency and amplitude, thereby realizing frequency modulation and voltage regulation control of the power grid voltage, stabilizing the power consumption of the alternating load in a factory, increasing the income source in a mode of participating in power grid frequency modulation and voltage regulation scheduling and the like.
The energy storage converter is used for abnormal power failure of the power grid and works in a standby state when the power supply of the power supply system does not reach a demand threshold. Specifically, when the power supply system adopts the new energy power generation subsystem to generate power and the energy storage subsystem is insufficient in energy supply (the insufficient supply refers to that the power supply quantity cannot reach the power consumption required by electricity), the energy storage converter works in a standby state, the power consumption of the bidirectional grid-constructed inverter is reduced, meanwhile, the purpose that the partial-division cabinet and the partial-capacity cabinet cell production line continue to normally operate is ensured, and the purpose that part of the production line can normally produce under abnormal conditions is realized.
As shown in fig. 3, the high-voltage distributed formation component testing system provided in this embodiment further includes a production logistics management subsystem, where the production logistics management subsystem is respectively in communication connection with the formation cabinet and the separation cabinet; the production logistics management subsystem is used for predicting the production test electricity demand of each bin in the formation cabinet and the capacity-division cabinet in real time, and controlling the charging and discharging of a plurality of bins in the formation cabinet and the capacity-division cabinet to be carried out simultaneously by adjusting the warehousing time interval of the bins, so that the formation cabinet and the capacity-division cabinet realize internal energy circulation.
The production logistics management subsystem predicts the production test electricity demand of each bin in the formation cabinet and the capacity-division cabinet in real time, when part of the bins in the formation cabinet and the capacity-division cabinet need to charge the DC/DC power supply, the part of bins are put into operation, so that the power supply system generates power and the energy storage subsystem discharges to charge the DC/DC power supply in the part of bins, when the charging is finished, the DC/DC power supply in the part of bins can be discharged, the rest of bins in the formation cabinet and the capacity-division cabinet can be put into operation, the electric quantity generated when the DC/DC power supply is discharged charges the DC/DC power supply in the rest of bins, and the charging and the discharging of a plurality of bins in the formation cabinet and the capacity-division cabinet are controlled to be simultaneously carried out through the bins at different time intervals, so that the formation cabinet and the capacity-division cabinet realize internal energy circulation.
As shown in fig. 3, the high-voltage distributed chemical composition testing system provided in this embodiment further includes an energy efficiency management subsystem, where the energy efficiency management subsystem is respectively in communication connection with the production logistics management subsystem, the bidirectional network inverter, the energy storage subsystem and the power supply system; the energy efficiency management subsystem is used for predicting the generated energy of the power supply system, and carrying out energy efficiency management and scheduling on the power consumption of the bidirectional grid-built inverter, the energy storage subsystem and the power generation of the power supply system according to the predicted generated energy result and the production test power demand result of each bin output by the production logistics management subsystem.
Specifically, the energy efficiency management subsystem predicts the generated energy of the power supply system, and according to the predicted result of the generated energy and the power consumption requirement of the bidirectional grid-constructed inverter combined with the power consumption requirement of the production test of each storage position, different storage positions in the formation cabinet and the capacity-dividing cabinet are put into use at different time intervals, so that the energy storage electric quantity of the energy storage subsystem and the generated energy of the power supply system are balanced with the power consumption of the formation cabinet and the capacity-dividing cabinet and the power consumption of the bidirectional grid-constructed inverter, and the aim of always keeping the optimal real-time energy efficiency operation of the system can be achieved. In fig. 3, a broken line represents a communication line, and a solid line represents a power line.
The working flow chart of the formation cabinet, the capacity-division cabinet, the bidirectional network inverter, the power supply subsystem, the energy storage subsystem, the production logistics management subsystem and the energy efficiency management subsystem is shown in fig. 5, and the flow is realized by the following steps:
step S101, the centralized high-power bidirectional grid inverter switches among a direct current control grid configuration state, an alternating current control grid configuration state and a standby state according to the state of the power grid through comprehensive judgment, a power supply system (realized by adopting a new energy power generation subsystem) state and an energy storage subsystem state.
Step S102, after a DC micro-grid formed by a centralized high-power bidirectional grid inverter, a power supply subsystem (realized by a new energy power generation subsystem) and an energy storage subsystem is built to run stably, a formation cabinet and a DC/DC power supply and a battery cell which are connected in series in the formation cabinet and the formation cabinet are formed in the formation test cabinet, and electric energy required by a battery cell charge and discharge test is obtained from a DC bus.
Step S103, the production logistics management subsystem predicts the production test electricity demand of each bin in the formation cabinet and the capacity-division cabinet in real time, and controls the charging and discharging of a plurality of bins in the formation cabinet and the capacity-division cabinet to be carried out simultaneously by adjusting the warehousing time interval of the bins, so that the formation cabinet and the capacity-division cabinet realize internal energy circulation.
Step S104, the running states of all subsystems in the system are monitored in real time through the energy efficiency management subsystem, the generated energy of the power supply subsystem is predicted, and energy efficiency management and scheduling are carried out on power consumption of the bidirectional grid-built inverter, energy storage of the energy storage subsystem and power generation of the power supply subsystem according to the predicted generated energy result and the production test power demand result of each bin output by the production logistics management subsystem.
According to the high-voltage distributed chemical composition testing system provided by the embodiment, a plurality of distributed DC/DC power supplies are adopted to independently perform charge and discharge tests on each battery cell, so that the control precision of charge and discharge voltage and current of a single battery cell is improved, and the stability of the battery cell production process and the consistency of a factory battery cell are improved; the DC/DC power supply is connected with the DC bus after being connected in series, so that the optional matching range of the DC bus voltage is wider, the high-voltage DC bus reduces the transmission current on a cable, the wire slot heats and the line loss is obviously reduced, the voltage difference between the input end and the output end of the DC/DC power supply is reduced, the switching loss of the DC/DC power supply is reduced, and the DC/DC power supply conversion efficiency is improved. By the energy efficiency management subsystem, optimal energy efficiency scheduling among all power generation, power utilization and energy storage subsystems in the system is realized, electric energy consumption for cell formation component production test is reduced, and the purposes of energy conservation, emission reduction, cost reduction and efficiency improvement are realized.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (10)
1. A high voltage distributed chemical composition testing system, the system comprising: the system comprises an electronic system, a direct current bus and a formation component testing cabinet, wherein the formation component testing cabinet comprises a formation cabinet and a separation cabinet, each of which comprises a plurality of library positions, and each library position comprises a plurality of DC/DC power supplies and a plurality of electric cores;
the power supply system is connected with the direct current buses, the input end of each DC/DC power supply is connected with the direct current buses after being connected, and the output end of each DC/DC power supply is connected with one battery core in series to form a power supply battery core serial branch;
the DC bus is used for supplying power to the plurality of DC/DC power supplies after DC conversion of the electric energy of the power supply system, and the DC/DC power supplies are used for carrying out charge and discharge tests on the battery cells.
2. The system of claim 1, further comprising a DC power switch connected between the DC bus and the input of the plurality of DC/DC power sources;
the DC power switch is used to open or close the connection between the DC bus and the input of the plurality of DC/DC power sources.
3. The system of claim 2, wherein the formation and capacity racks further comprise a bank bypass switch and a channel bypass switch;
each power supply cell series branch is connected with one end of a channel bypass switch, the other end of the channel bypass switch is connected with one end of a library bit bypass switch, and the other end of the library bit bypass switch is connected with a direct current bus through a direct current power switch;
the channel bypass switch is used for bypassing the power supply cell serial branch circuit where the cell or the DC/DC power supply is positioned when the cell or the DC/DC power supply in the power supply cell serial branch circuit is abnormal;
the storage position bypass switch is used for disconnecting the storage position or the formation cabinet where the storage position is located or the capacity-dividing cabinet where the storage position is located from the corresponding connected direct current switch when the storage position or the formation cabinet where the storage position is located or the capacity-dividing cabinet input side where the storage position is located has positive and negative short circuit or is required to be shut down for maintenance.
4. The system of claim 1, wherein the formation enclosure is configured to charge, discharge, and store electrical power to the electrical cells;
the capacity-dividing cabinet is used for grouping and managing the battery cells.
5. The system of claim 1, further comprising an ac bus and a bi-directional grid inverter, the bi-directional grid inverter comprising an ac power distribution cabinet, an energy storage converter, and a first dc power distribution cabinet;
the input end of the alternating current power distribution cabinet is connected with an alternating current bus, the output end of the alternating current power distribution cabinet is connected with the input end of the energy storage converter, the output end of the energy storage converter is connected with the input end of the first direct current power distribution cabinet, and the output end of the first direct current power distribution cabinet is connected with the direct current bus.
6. The system of claim 5, wherein the energy storage converter is configured to operate in a dc-controlled grid configuration when the power supply of the power supply system reaches a demand threshold, and wherein the energy storage converter feeds back a remaining amount of power not used by the power supply system to the power grid through a dc bus;
or the energy storage converter is used for working in an alternating current control network structure state when the frequency or amplitude of the power grid voltage fluctuates by a preset amplitude, and the energy storage converter carries out frequency modulation and voltage regulation control on the power grid voltage when the alternating current control network structure state and the power supply of the power supply system reaches a demand threshold;
or the energy storage converter is used for abnormal power failure of the power grid and works in a standby state when the power supply of the power supply system does not reach the demand threshold.
7. The system of claim 5, further comprising an energy storage subsystem connected in parallel with the power supply subsystem, the energy storage subsystem comprising an energy storage container, a first DC/DC converter, and a second DC power distribution cabinet, the energy storage container, the first DC/DC converter, and the second DC power distribution cabinet being connected in sequence and then connected to a DC bus;
the energy storage subsystem is used for recovering unused residual electric quantity stored on the direct current bus and participating in peak clipping and valley filling work in a set peak-valley electricity price period.
8. The system of claim 7, further comprising a production logistics management subsystem communicatively coupled to the formation and capacity racks, respectively;
the production logistics management subsystem is used for predicting the production test electricity demand of each bin in the formation cabinet and the capacity-division cabinet in real time, and controlling the charging and discharging of a plurality of bins in the formation cabinet and the capacity-division cabinet to be carried out simultaneously by adjusting the warehousing time interval of the bins, so that the formation cabinet and the capacity-division cabinet realize internal energy circulation.
9. The system of claim 8, further comprising an energy efficiency management subsystem communicatively coupled to the production logistics management subsystem, the bi-directional grid inverter, the energy storage subsystem, and the power supply subsystem, respectively;
the energy efficiency management subsystem is used for predicting the generated energy of the power supply system, and carrying out energy efficiency management scheduling on the power consumption of the bidirectional grid-built inverter, the energy storage subsystem and the power generation of the power supply system according to the generated energy prediction result and the production test power demand result of each storage position output by the production logistics management subsystem.
10. The system of claim 1, wherein the power supply system comprises a power generation module, an AC/DC converter, a second DC/DC converter, and a third direct current power distribution cabinet;
the power generation module, the AC/DC converter and the third direct current power distribution cabinet are sequentially connected and then connected with the direct current bus; the AC/DC converter converts alternating current of the power generation module into direct current and supplies power to the direct current bus through a third direct current power distribution cabinet;
and/or the number of the groups of groups,
the power generation module, the second DC/DC converter and the third DC power distribution cabinet are sequentially connected and then connected with the DC bus; and the second DC/DC converter performs direct current conversion on the electric energy of the power generation module and supplies power to the direct current bus through a third direct current power distribution cabinet.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118263495A (en) * | 2024-04-02 | 2024-06-28 | 广州擎天实业有限公司 | DC bus-based serial formation component production detection system |
| CN118399365A (en) * | 2024-06-28 | 2024-07-26 | 合肥召洋电子科技有限公司 | Energy feedback type direct current micro-grid energy storage system for battery detection |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294201A (en) * | 2017-06-02 | 2017-10-24 | 北京科诺伟业科技股份有限公司 | A kind of synchronous generator and energy accumulation current converter analog platform in parallel |
| CN110474118A (en) * | 2019-07-09 | 2019-11-19 | 福建星云电子股份有限公司 | A kind of energy feedback type battery core series connection chemical conversion, partial volume test macro and method |
| CN110943483A (en) * | 2019-12-18 | 2020-03-31 | 国网智能科技股份有限公司 | Micro-grid system and control method |
| CN111381172A (en) * | 2018-12-28 | 2020-07-07 | 天津银隆新能源有限公司 | Micro-grid-based battery testing and formation-capacitance-grading coupling system and control method |
| CN113933726A (en) * | 2021-09-09 | 2022-01-14 | 广州擎天实业有限公司 | Lithium power battery formation and capacity grading series connection detection system |
| CN115360773A (en) * | 2022-07-29 | 2022-11-18 | 厦门科华数能科技有限公司 | Non-communication parallel operation method of energy storage system, coordination controller and storage medium |
| CN116609681A (en) * | 2023-04-28 | 2023-08-18 | 广东恒翼能科技股份有限公司 | Chemical composition testing and warehousing method and chemical composition testing micro-grid energy-saving control system |
| CN116819355A (en) * | 2023-04-28 | 2023-09-29 | 广东恒翼能科技股份有限公司 | Energy-saving test system for direct-current bus of micro-grid at rear section of battery cell |
-
2023
- 2023-11-20 CN CN202311553561.XA patent/CN117607516A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294201A (en) * | 2017-06-02 | 2017-10-24 | 北京科诺伟业科技股份有限公司 | A kind of synchronous generator and energy accumulation current converter analog platform in parallel |
| CN111381172A (en) * | 2018-12-28 | 2020-07-07 | 天津银隆新能源有限公司 | Micro-grid-based battery testing and formation-capacitance-grading coupling system and control method |
| CN110474118A (en) * | 2019-07-09 | 2019-11-19 | 福建星云电子股份有限公司 | A kind of energy feedback type battery core series connection chemical conversion, partial volume test macro and method |
| CN110943483A (en) * | 2019-12-18 | 2020-03-31 | 国网智能科技股份有限公司 | Micro-grid system and control method |
| CN113933726A (en) * | 2021-09-09 | 2022-01-14 | 广州擎天实业有限公司 | Lithium power battery formation and capacity grading series connection detection system |
| WO2023035392A1 (en) * | 2021-09-09 | 2023-03-16 | 广州擎天实业有限公司 | Series detection system for formation and capacity grading of lithium power battery |
| CN115360773A (en) * | 2022-07-29 | 2022-11-18 | 厦门科华数能科技有限公司 | Non-communication parallel operation method of energy storage system, coordination controller and storage medium |
| CN116609681A (en) * | 2023-04-28 | 2023-08-18 | 广东恒翼能科技股份有限公司 | Chemical composition testing and warehousing method and chemical composition testing micro-grid energy-saving control system |
| CN116819355A (en) * | 2023-04-28 | 2023-09-29 | 广东恒翼能科技股份有限公司 | Energy-saving test system for direct-current bus of micro-grid at rear section of battery cell |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118263495A (en) * | 2024-04-02 | 2024-06-28 | 广州擎天实业有限公司 | DC bus-based serial formation component production detection system |
| CN118399365A (en) * | 2024-06-28 | 2024-07-26 | 合肥召洋电子科技有限公司 | Energy feedback type direct current micro-grid energy storage system for battery detection |
| CN118399365B (en) * | 2024-06-28 | 2024-09-17 | 合肥召洋电子科技有限公司 | Energy feedback type direct current micro-grid energy storage system for battery detection |
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