CN113054713B - Method and device for gradient utilization of retired battery - Google Patents
Method and device for gradient utilization of retired battery Download PDFInfo
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- CN113054713B CN113054713B CN202110367842.0A CN202110367842A CN113054713B CN 113054713 B CN113054713 B CN 113054713B CN 202110367842 A CN202110367842 A CN 202110367842A CN 113054713 B CN113054713 B CN 113054713B
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000004146 energy storage Methods 0.000 claims abstract description 74
- 230000016507 interphase Effects 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 238000007599 discharging Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 12
- 238000004590 computer program Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000000178 monomer Substances 0.000 description 1
- 238000011022 operating instruction Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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Abstract
The invention discloses a method and a device for gradient utilization of retired batteries, wherein the method comprises the following steps: firstly, transmitting the retired battery to a designated position of an energy storage system by using automatic transmission equipment; secondly, connecting the retired battery transferred in place with an H bridge circuit of an energy storage system; and finally, carrying out SOC balance management on the retired battery after connection, so that the retired battery can charge or discharge in the energy storage system, wherein the SOC balance management comprises inter-phase balance and inter-phase balance. According to the echelon utilization method, the retired batteries are conveyed to the positions to be replaced of the batteries in the energy storage system in a pipeline mode through the automatic conveying equipment, so that intelligent replacement of the batteries can be realized, and the replacement efficiency and safety are improved; in the method, the difference between the single batteries in the energy storage system can be reduced by carrying out SOC balance management on the retired batteries, the service life of the retired batteries can be prolonged to the maximum extent, and the recycling of the retired batteries can be effectively realized.
Description
Technical Field
The invention belongs to the technical field of battery energy storage, and particularly relates to a gradient utilization method and device for retired batteries.
Background
The retired battery has the differences of parameters such as internal resistance, terminal voltage, capacity, self-discharge and the like, and the inconsistency among the single batteries is aggravated by the ventilation and heat dissipation differences among the batteries and the overcharge, overdischarge and the like of the batteries in the use process of the battery, and the inconsistency among the single batteries can be continuously increased along with the charge-discharge cycle and continuous use of the battery. When retired batteries are reused, the discharge capacity of the battery pack is reduced and the service life of the battery is shortened due to the wooden barrel effect of the battery pack. In extreme cases, battery overcharge or overdischarge may even cause safety accidents. In addition, the existing retired battery has the problems of low replacement efficiency and poor safety.
Disclosure of Invention
In view of the above, the present invention discloses a method and apparatus for gradient utilization of retired batteries to overcome or at least partially solve the above-mentioned problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention discloses a cascade utilization method of retired batteries, which comprises the following steps:
Transmitting the retired battery to a designated location of the energy storage system using an automatic transmission device;
An H-bridge circuit connecting the retired battery transferred in place with an energy storage system;
And carrying out SOC balance management on the retired battery after connection, so that the retired battery charges or discharges in the energy storage system, wherein the SOC balance management comprises inter-phase balance and inter-phase balance.
Further, the method for transferring the retired battery to the designated location of the energy storage system by using the automatic transfer device comprises the following steps:
And detecting whether the retired battery is transmitted to a position by using a position sensor of the automatic transmission equipment so as to realize point-to-point transmission of the retired battery.
Further, the H-bridge circuit connecting the retired battery and the energy storage system in place includes:
Firstly, a bypass switch of the H bridge circuit connected with an alternating current loop is closed, so that alternating current loop current of an energy storage system does not flow through the H bridge circuit any more, then the H bridge circuit is disconnected with the alternating current loop, after the retired battery is connected with the H bridge circuit, connection of the H bridge circuit with the alternating current loop is sequentially restored, and the bypass switch is disconnected.
Further, the SOC balancing management of the retired battery after connection includes:
Detecting the SOC value of the retired battery, making a difference between the SOC value of the retired battery and a preset SOC standard value, generating a deviation amount according to the obtained difference value, superposing the deviation amount on a modulated sine wave of an H-bridge circuit connected with the retired battery, and controlling the charging or discharging rate of the retired battery.
Further, the method further comprises:
comparing the SOC value of the retired battery with a preset SOC limit value, and replacing the retired battery if the SOC value of the retired battery is lower than the SOC limit value.
Further, the phase equalization is specifically:
Calculating the capacity difference delta C ij of each retired battery in each phase according to the following formula;
wherein, C ij is the capacity of the retired battery, N is the quantity of the retired battery in each phase, and i and j are the phase number and the stage number respectively;
And multiplying the capacity difference delta C ij of each retired battery with the modulated sine wave of the H bridge circuit connected with each retired battery to obtain the modulated wave with the capacity information of the retired battery.
Further, the inter-phase equalization specifically includes:
The zero sequence voltage is calculated by the following formula Sum capacity zero voltage vector magnitude/>
Wherein K 2 is an equalization coefficient, deltaC is the difference between the capacity of each phase submodule and the average capacity of each phase, deltaSOC is the amplitude of the difference between the SOC i of each phase and the average SOC of each phase,Is zero voltage initial phase, ωt is grid voltage phase,/>Equalizing the zero vector initial phase angle for the superimposed capacity;
Voltage of zero sequence Sum capacity zero voltage vector magnitude/>Superimposed on the total voltage modulation wave of each phase to obtain the modulation voltage/>, of each phase
Wherein,The wave is modulated for the total voltage of each phase.
Further, the method further comprises:
And when the retired battery is charged or discharged to a preset state, detaching the retired battery from the energy storage system, and conveying the retired battery away from the appointed position through the automatic conveying equipment.
In another aspect, the invention discloses a cascade utilization apparatus for retired batteries, the apparatus comprising:
The automatic transmission equipment is used for transmitting the retired battery to a designated position of the energy storage system;
The connection controller is used for connecting the retired battery transferred in place with an H-bridge circuit of the energy storage system;
and the SOC equalizer is used for carrying out SOC equalization management on the retired battery after connection, so that the retired battery charges or discharges in the energy storage system, and the SOC equalization management comprises inter-phase equalization and inter-phase equalization.
Further, the automatic transmission device is provided with a position sensor, and the automatic transmission device detects whether the retired battery is transmitted to a position or not by using the position sensor so as to realize point-to-point transmission of the retired battery.
The invention has the advantages and beneficial effects that:
According to the echelon utilization method, the retired batteries are conveyed to the positions to be replaced of the batteries in the energy storage system in a pipeline mode through the automatic conveying equipment, so that intelligent replacement of the batteries can be realized, and the replacement efficiency and safety are improved; in the method, the difference between small single batteries in the energy storage system can be reduced by carrying out SOC balance management on the retired battery, the service life of the retired battery can be prolonged to the maximum extent, and the recycling of the retired battery can be effectively realized.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a diagram showing steps in a method for gradient utilization of retired batteries in one embodiment of the invention;
FIG. 2 is a schematic diagram of a cascade utilization method implementation of retired batteries in one embodiment of the invention;
FIG. 3 is a connection block diagram of an H-bridge circuit in one embodiment of the invention;
FIG. 4 is a schematic diagram of SOC balance management of retired batteries according to one embodiment of the invention;
FIG. 5 is a schematic diagram of in-phase equalization of an energy storage system in accordance with an embodiment of the present invention;
FIG. 6 is a schematic diagram of phase-to-phase equalization of an energy storage system in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view of a step utilization apparatus for retired batteries according to one embodiment of the present invention;
FIG. 8 is a schematic view of a step utilization apparatus for retired batteries in accordance with one embodiment of the present invention;
Fig. 9 is a schematic structural view of a cascade utilization apparatus for retired batteries in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the 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.
The following describes in detail the technical solutions provided by the embodiments of the present invention with reference to the accompanying drawings.
In one embodiment of the present invention, a method for gradient utilization of retired batteries is disclosed, as shown in fig. 1, comprising the steps of:
Step 1, as shown in fig. 2, using an automatic transmission device to transmit retired batteries to a designated position of an energy storage system; for example: when one or more batteries in the energy storage system need to be replaced, the retired batteries are transported in batches to the positions in the energy storage system, which need to be replaced, in a pipelining manner through a conveyor belt and a conveyor disk. The retired battery can be in an empty state or a full state.
Step 2, connecting the retired battery transferred in place with an H bridge circuit of an energy storage system; when the retired battery is transmitted to a designated position, the retired battery is connected to an H-bridge circuit of an energy storage system, and the connection process can be realized through mechanical automation.
And 3, after the retired battery is connected to the H bridge circuit, performing SOC balance management on the retired battery, performing balance control on the electric quantity of each retired battery in a targeted manner, reducing the difference among the single batteries, and enabling the retired battery to charge or discharge in an energy storage system, wherein the SOC balance management comprises inter-phase balance and inter-phase balance.
In summary, in the echelon utilization method of the embodiment, the retired battery is conveyed to the battery to be replaced position in the energy storage system in a pipeline manner through the automatic conveying equipment, so that intelligent replacement of the battery can be realized, and the battery replacement efficiency and safety are improved; in the method, the difference between the single batteries in the energy storage system can be reduced by carrying out SOC balance management on the retired batteries, the service life of the retired batteries can be prolonged to the maximum extent, and the recycling of the retired batteries can be effectively realized.
In one embodiment, transferring retired batteries to a designated location of an energy storage system using an automated transfer device includes:
Position sensor of automatic conveying equipment is utilized to detect whether the retired battery is conveyed in place, so that point-to-point conveying of the retired battery is realized, conveying efficiency of the retired battery is improved, and intelligent replacement of the retired battery is facilitated. The position sensor can be directly arranged on the automatic conveying equipment or arranged at the H-bridge circuit on the energy storage system, and the position sensor can be an infrared position sensor.
In one embodiment, as shown in FIG. 3, an H-bridge circuit connecting a retired battery delivered to a site with an energy storage system, comprises:
Firstly, closing a bypass switch k 1 of an H-bridge circuit connected with an alternating current loop, so that the alternating current loop current of an energy storage system does not flow through the H-bridge circuit any more, and then completely disconnecting the H-bridge circuit from the alternating current loop, namely, disconnecting the switch k 2; after the retired battery is connected with the H bridge circuit, the connection of the H bridge circuit and the alternating current loop is sequentially restored, and the bypass switch is disconnected, namely, the switch k 2 is closed firstly, and then the switch k 1 is opened, so that the retired battery is connected into the alternating current loop of the energy storage system through the H bridge circuit, and further charging or discharging of the retired battery is realized.
In one embodiment, SOC balancing management of the retired battery after connection includes:
As shown in fig. 4, the SOC value of the retired battery is detected, the SOC value of the retired battery is differentiated from a preset SOC standard value, a deviation amount is generated according to the obtained difference value, the deviation amount is superimposed on a modulated sine wave of an H-bridge circuit connected with the retired battery, and the charge or discharge rate of the retired battery is controlled. Through carrying out SOC equilibrium management to each retired battery on the energy storage system, can carry out balanced adjustment to the electric quantity of every retired battery, overcome the difference between each monomer battery, realize each retired battery and be full of simultaneously and charge or the discharge, guaranteed the uniformity of retired battery charge-discharge.
Further, the cascade utilization method of the retired battery further comprises the following steps:
In order to prevent the battery with poor energy storage capability from influencing the operation of the energy storage system, the SOC value of the retired battery is compared with a preset SOC limit value, and if the SOC value of the retired battery is lower than the SOC limit value, the retired battery is replaced.
In one embodiment, as shown in fig. 5, the phase equalization is specifically:
the capacity difference deltac ij of each retired battery in each phase was calculated by the following formula.
Wherein, C ij is the capacity of the retired battery, N is the quantity of the retired battery in each phase, and i and j are the number of phases and the number of stages respectively.
And multiplying the capacity difference delta C ij of each retired battery by the modulated sine wave of the H bridge circuit connected with each retired battery to obtain the modulated wave with the capacity information of the retired battery.
The phase equalization is specifically: the charge and discharge power of each retired battery is controlled by reasonably controlling the current of each retired battery in the phase, namely, the charge and discharge speed of each retired battery is controlled. In the SOC balance control, a given current value of each retired battery is calculated according to the difference of the SOCs, so that the charge and discharge currents of the retired batteries can be controlled, further, the SOC balance control among the retired batteries in the phase in the charge and discharge process is realized, the retired batteries can reach a full or empty state at the same time, and the purpose of improving the battery utilization rate in an energy storage system is realized.
In one embodiment, as shown in fig. 6, inter-phase equalization is specifically:
The zero sequence voltage is calculated by the following formula Sum capacity zero voltage vector magnitude/>
Wherein K 2 is an equalization coefficient, deltaC is the difference between the capacity of each phase submodule and the average capacity of each phase, deltaSOC is the amplitude of the difference between the SOC i of each phase and the average SOC of each phase,Is zero voltage initial phase, ωt is grid voltage phase,/>The zero vector initial phase angles are equalized for the superimposed capacity.
Voltage of zero sequenceSum capacity zero voltage vector magnitude/>Superimposed on the total voltage modulation wave of each phase to obtain the modulation voltage/>, of each phase
Wherein,The wave is modulated for the total voltage of each phase.
The phase-to-phase equalization is specifically: in-phase SOC balance control is adopted in the energy storage system, SOC balance can be realized among the retired batteries in each phase, and the average SOCs of the retired batteries among the three phases still possibly have a gap. Therefore, it is necessary to equalize the SOC of each of the retired batteries at the interphase while performing the interphase SOC equalization control. Zero sequence voltage is injected into the output voltage of the energy storage system, so that the total active power of the energy storage system is not changed on the premise of unbalanced three-phase power of the battery side, the three-phase power balance state of the power grid side is maintained, and the power quality of the power grid side is not affected. Therefore, the inter-phase SOC balance control can be performed by controlling the total power of the three-phase respective batteries in a zero-sequence voltage injection mode, a reasonable zero-sequence voltage is calculated according to the SOC difference, so that one phase with smaller average SOC has larger charging power in the charging process of the energy storage system, and one phase with larger average SOC has smaller charging power; the opposite is true during discharge.
In a preferred embodiment, the cascade utilization method of the retired battery further comprises:
And when the retired battery is charged or discharged to a preset state, the retired battery is detached from the energy storage system and is conveyed away from the designated position through automatic conveying equipment.
Specifically, when the electric energy in the power grid is excessive, the retired battery on the energy storage system cannot accommodate the excessive electric energy, the retired battery charged to a preset state can be detached from the energy storage system and is transported away from the energy storage system through automatic transmission equipment, and then the retired battery with empty electricity is transported to a battery vacancy position on the energy storage system, so that the retired battery is connected with the H bridge circuit, and the charge of the retired battery is realized. When the electric energy in the power grid is insufficient, the retired battery on the energy storage system cannot supplement insufficient electric energy, the retired battery discharged to a preset state can be detached from the energy storage system and is transported away from the energy storage system through automatic transmission equipment, and then the full-electric retired battery is transported to a battery vacancy position on the energy storage system, so that the retired battery is connected with an H-bridge circuit, and the retired battery is discharged. The capacity expansion of the energy storage system can be realized only by replacing the retired battery on the energy storage system.
In one embodiment of the present invention, a cascade utilization apparatus 700 for retired batteries is disclosed, and as shown in fig. 7, the cascade utilization apparatus 700 includes:
an automatic transfer device 710 for transferring the retired battery to a designated location of the energy storage system.
And a connection controller 720 for connecting the retired battery transferred in place to the H-bridge circuit of the energy storage system.
And the SOC equalizer 730 is configured to perform SOC equalization management on the connected retired battery, so that the retired battery charges or discharges in the energy storage system, where the SOC equalization management includes inter-phase equalization and inter-phase equalization.
Preferably, the automatic transfer device 710 is provided with a position sensor, which is used by the automatic transfer device to detect whether the retired battery is transferred in place, to achieve point-to-point transfer of retired battery.
In one embodiment, an H-bridge circuit for connecting an out-of-service battery delivered in place to an energy storage system, coupled to controller 720, comprises:
Firstly, a bypass switch of the H bridge circuit connected with an alternating current loop is closed, so that the alternating current loop current of the energy storage system does not flow through the H bridge circuit any more, then the H bridge circuit is completely disconnected with the alternating current loop, and after the retired battery is connected with the H bridge circuit, the connection between the H bridge circuit and the alternating current loop and the disconnection of the bypass switch are sequentially recovered.
In one embodiment, the SOC equalizer 730 is configured to detect an SOC value of the retired battery, make a difference between the SOC value of the retired battery and a preset SOC standard value, generate a deviation according to the obtained difference, superimpose the deviation on a modulated sine wave of an H-bridge circuit connected to the retired battery, and control a charging or discharging rate of the retired battery.
In one embodiment, as shown in fig. 8, the cascade utilization apparatus 700 of the retired battery further includes:
And the comparison controller 740 is configured to compare the SOC value of the retired battery with a preset SOC limit value, and replace the retired battery if the SOC value of the retired battery is lower than the SOC limit value.
Further, the phase internal equalization is specifically:
the capacity difference deltac ij of each retired battery in each phase was calculated by the following formula.
Wherein, C ij is the capacity of the retired battery, N is the quantity of the retired battery in each phase, and i and j are the number of phases and the number of stages respectively.
And multiplying the capacity difference delta C ij of each retired battery by the modulated sine wave of the H bridge circuit connected with each retired battery to obtain the modulated wave with the capacity information of the retired battery.
Further, inter-phase equalization is specifically:
The zero sequence voltage is calculated by the following formula Sum capacity zero voltage vector magnitude/>
Wherein K 2 is an equalization coefficient, deltaC is the difference between the capacity of each phase submodule and the average capacity of each phase, deltaSOC is the amplitude of the difference between the SOC i of each phase and the average SOC of each phase,Is zero voltage initial phase, ωt is grid voltage phase,/>The zero vector initial phase angles are equalized for the superimposed capacity.
Voltage of zero sequenceSum capacity zero voltage vector magnitude/>Superimposed on the total voltage modulation wave of each phase to obtain the modulation voltage/>, of each phase
Wherein,The wave is modulated for the total voltage of each phase.
In one embodiment, the automatic transfer device is configured to detach the retired battery from the energy storage system and to transport the retired battery away from the designated location via the automatic transfer device when the retired battery is charged or discharged to a preset state.
One embodiment of the invention discloses a cascade utilization device of retired batteries, which comprises: a processor; and a memory arranged to store computer executable instructions that, when executed, cause the processor to perform a method of ladder utilization of any of the retired batteries described above.
Fig. 9 is a schematic view showing a configuration of a cascade utilization apparatus for retired batteries according to an embodiment of the present application. Referring to fig. 9, at the hardware level, the cascade utilization apparatus of the retired battery includes a processor, and optionally an internal bus, a network interface, and a memory. The Memory may include a Memory, such as a Random-Access Memory (RAM), and may further include a non-volatile Memory (non-volatile Memory), such as at least 1 disk Memory. Of course, the off-service battery cascade utilization device may also include hardware required by other services.
The processor, network interface, and memory may be interconnected by an internal bus, which may be an ISA (Industry Standard Architecture ) bus, a PCI (PERIPHERAL COMPONENT INTERCONNECT, peripheral component interconnect standard) bus, or EISA (Extended Industry StandardArchitecture ) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in fig. 9, but not only one bus or one type of bus.
And the memory is used for storing programs. In particular, the program may include program code including computer-operating instructions. The memory may include memory and non-volatile storage and provide instructions and data to the processor.
The processor reads the corresponding computer program from the nonvolatile memory into the memory and then runs, and the object detection device is formed on the logic level. The processor is used for executing the programs stored in the memory and is specifically used for executing the following operations:
And transmitting the retired battery to a designated position of the energy storage system by using an automatic transmission device.
And connecting the retired battery transferred in place with an H-bridge circuit of the energy storage system.
And carrying out SOC balance management on the connected retired battery, so that the retired battery can charge or discharge in the energy storage system, wherein the SOC balance management comprises inter-phase balance and inter-phase balance.
The method for gradient utilization of retired batteries disclosed in the embodiment of fig. 1 of the present application may be applied to or implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but may also be a digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATEARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.
The embodiment of the present application also proposes a computer-readable storage medium storing one or more programs, the one or more programs including instructions that, when executed by a cascade utilization apparatus of a retired battery including a plurality of application programs, enable the cascade utilization apparatus of the retired battery to execute a cascade utilization method of the retired battery in the embodiment shown in fig. 1, and specifically configured to execute:
And transmitting the retired battery to a designated position of the energy storage system by using an automatic transmission device.
And connecting the retired battery transferred in place with an H-bridge circuit of the energy storage system.
And carrying out SOC balance management on the connected retired battery, so that the retired battery can charge or discharge in the energy storage system, wherein the SOC balance management comprises inter-phase balance and inter-phase balance.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transitorymedia), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The foregoing is merely an embodiment of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (9)
1. A method for gradient utilization of retired batteries, the method comprising the steps of:
Transmitting the retired battery to a designated location of the energy storage system using an automatic transmission device;
An H-bridge circuit connecting the retired battery transferred in place with an energy storage system;
Performing SOC balance management on the connected retired battery to enable the retired battery to charge or discharge in the energy storage system, wherein the SOC balance management comprises inter-phase balance and inter-phase balance;
The phase internal equalization is specifically:
Calculating the capacity difference delta C ij of each retired battery in each phase according to the following formula;
wherein, C ij is the capacity of the retired battery, N is the quantity of the retired battery in each phase, and i and j are the phase number and the stage number respectively;
And multiplying the capacity difference delta C ij of each retired battery with the modulated sine wave of the H bridge circuit connected with each retired battery to obtain the modulated wave with the capacity information of the retired battery.
2. The method of claim 1, wherein the transferring the retired battery to the designated location of the energy storage system using the automated transfer equipment comprises:
And detecting whether the retired battery is transmitted to a position by using a position sensor of the automatic transmission equipment so as to realize point-to-point transmission of the retired battery.
3. The method of claim 1, wherein the connecting the retired battery in place with the H-bridge circuit of the energy storage system comprises:
Firstly, a bypass switch of the H bridge circuit connected with an alternating current loop is closed, so that alternating current loop current of an energy storage system does not flow through the H bridge circuit any more, then the H bridge circuit is disconnected with the alternating current loop, after the retired battery is connected with the H bridge circuit, connection of the H bridge circuit with the alternating current loop is sequentially restored, and the bypass switch is disconnected.
4. The cascade utilization method according to claim 1, wherein the SOC equalization management of the retired battery after connection includes:
Detecting the SOC value of the retired battery, making a difference between the SOC value of the retired battery and a preset SOC standard value, generating a deviation amount according to the obtained difference value, superposing the deviation amount on a modulated sine wave of an H-bridge circuit connected with the retired battery, and controlling the charging or discharging rate of the retired battery.
5. The method of claim 4, further comprising:
comparing the SOC value of the retired battery with a preset SOC limit value, and replacing the retired battery if the SOC value of the retired battery is lower than the SOC limit value.
6. The cascade utilization method according to claim 1, characterized in that the inter-phase equalization is in particular:
The zero sequence voltage is calculated by the following formula Sum capacity zero voltage vector magnitude/>
Wherein K 2 is an equalization coefficient, deltaC is the difference between the capacity of each phase submodule and the average capacity of each phase, deltaSOC is the amplitude of the difference between the SOC i of each phase and the average SOC of each phase,Is zero voltage initial phase, ωt is grid voltage phase,/>Equalizing the zero vector initial phase angle for the superimposed capacity;
Voltage of zero sequence Sum capacity zero voltage vector magnitude/>Superimposed on the total voltage modulation wave of each phase to obtain the modulation voltage/>, of each phase
Wherein,The wave is modulated for the total voltage of each phase.
7. The method of claim 1-6, further comprising:
And when the retired battery is charged or discharged to a preset state, detaching the retired battery from the energy storage system, and conveying the retired battery away from the appointed position through the automatic conveying equipment.
8. A cascade utilization apparatus for retired batteries, the apparatus comprising:
The automatic transmission equipment is used for transmitting the retired battery to a designated position of the energy storage system;
The connection controller is used for connecting the retired battery transferred in place with an H-bridge circuit of the energy storage system;
The SOC equalizer is used for carrying out SOC equalization management on the retired battery after connection, so that the retired battery charges or discharges in the energy storage system, and the SOC equalization management comprises inter-phase equalization and inter-phase equalization;
The phase internal equalization is specifically:
Calculating the capacity difference delta C ij of each retired battery in each phase according to the following formula;
wherein, C ij is the capacity of the retired battery, N is the quantity of the retired battery in each phase, and i and j are the phase number and the stage number respectively;
And multiplying the capacity difference delta C ij of each retired battery with the modulated sine wave of the H bridge circuit connected with each retired battery to obtain the modulated wave with the capacity information of the retired battery.
9. The apparatus of claim 8, wherein the automatic transfer device is provided with a position sensor, and wherein the automatic transfer device detects whether the retired battery is transferred in place using the position sensor to effect point-to-point transfer of the retired battery.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296722A (en) * | 2013-05-30 | 2013-09-11 | 中国南方电网有限责任公司调峰调频发电公司 | In-phase SOC (state of charge) balance control method applying to H bridge cascaded battery energy storage system |
| CN105337297A (en) * | 2015-12-09 | 2016-02-17 | 北京能源投资（集团）有限公司 | Balancing method and the device for state of charge (SOC) of energy storage system |
| CN106058339A (en) * | 2016-07-28 | 2016-10-26 | 东南大学 | Balance control method of SOC (State of Charge) of energy storage system with auxiliary power loop |
| CN108454451A (en) * | 2018-05-11 | 2018-08-28 | 宁波利维能储能***有限公司 | Electric vehicle changes electricity and energy storage station |
| CN108879735A (en) * | 2018-05-28 | 2018-11-23 | 中国科学院电工研究所 | Energy storage SOC balance control method is pressed in one kind |
| CN109617164A (en) * | 2018-12-20 | 2019-04-12 | 广东电网有限责任公司 | A kind of echelon utilizes battery SOC balance control method |
| CN109742782A (en) * | 2019-02-12 | 2019-05-10 | 广州智光储能科技有限公司 | A kind of device and method utilized suitable for retired power battery echelon |
| CN111884241A (en) * | 2020-07-17 | 2020-11-03 | 北京金茂绿建科技有限公司 | System and method for peak regulation, electricity storage and electricity changing |
-
2021
- 2021-04-06 CN CN202110367842.0A patent/CN113054713B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296722A (en) * | 2013-05-30 | 2013-09-11 | 中国南方电网有限责任公司调峰调频发电公司 | In-phase SOC (state of charge) balance control method applying to H bridge cascaded battery energy storage system |
| CN105337297A (en) * | 2015-12-09 | 2016-02-17 | 北京能源投资（集团）有限公司 | Balancing method and the device for state of charge (SOC) of energy storage system |
| CN106058339A (en) * | 2016-07-28 | 2016-10-26 | 东南大学 | Balance control method of SOC (State of Charge) of energy storage system with auxiliary power loop |
| CN108454451A (en) * | 2018-05-11 | 2018-08-28 | 宁波利维能储能***有限公司 | Electric vehicle changes electricity and energy storage station |
| CN108879735A (en) * | 2018-05-28 | 2018-11-23 | 中国科学院电工研究所 | Energy storage SOC balance control method is pressed in one kind |
| CN109617164A (en) * | 2018-12-20 | 2019-04-12 | 广东电网有限责任公司 | A kind of echelon utilizes battery SOC balance control method |
| CN109742782A (en) * | 2019-02-12 | 2019-05-10 | 广州智光储能科技有限公司 | A kind of device and method utilized suitable for retired power battery echelon |
| CN111884241A (en) * | 2020-07-17 | 2020-11-03 | 北京金茂绿建科技有限公司 | System and method for peak regulation, electricity storage and electricity changing |
Non-Patent Citations (1)
| Title |
|---|
| H桥级联型储能***模块化独立控制研究;李凯;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20190115;第12-15、37-49页 * |
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