CN113054713A - Echelon utilization method and device for retired battery - Google Patents
Echelon utilization method and device for retired battery Download PDFInfo
- Publication number
- CN113054713A CN113054713A CN202110367842.0A CN202110367842A CN113054713A CN 113054713 A CN113054713 A CN 113054713A CN 202110367842 A CN202110367842 A CN 202110367842A CN 113054713 A CN113054713 A CN 113054713A
- Authority
- CN
- China
- Prior art keywords
- battery
- retired
- retired battery
- phase
- soc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000004146 energy storage Methods 0.000 claims abstract description 74
- 230000016507 interphase Effects 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims description 12
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 18
- 238000004590 computer program Methods 0.000 description 11
- 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
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 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
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011022 operating instruction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 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
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a echelon utilization method and a echelon utilization device for retired batteries, wherein the method comprises the following steps of: firstly, an automatic transmission device is used for transmitting a retired battery to a designated position of an energy storage system; secondly, connecting the ex-service battery which is transmitted in place with an H-bridge circuit of the energy storage system; and finally, carrying out 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 in-phase balance and interphase balance. In the echelon utilization method, the retired battery is conveyed to the position to be replaced of the battery in the energy storage system in a flow line mode through the automatic conveying equipment, so that the intelligent replacement of the battery can be realized, and the replacement efficiency and the replacement safety are improved; in addition, in the method, the difference among the 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 retired battery can be recycled effectively.
Description
Technical Field
The invention belongs to the technical field of battery energy storage, and particularly relates to a echelon utilization method and device for a retired battery.
Background
The variability of parameters such as internal resistance, terminal voltage, capacity and self-discharge of the retired battery exists, and the inconsistency among the single batteries is aggravated by the ventilation and heat dissipation difference among the batteries and the overcharge and overdischarge of the batteries in the use process of the batteries, and the inconsistency among the single batteries is continuously increased along with the charge-discharge cycle and the continuous use of the batteries. When the retired battery is reused, the discharge capacity of the battery pack is reduced and the service life of the battery pack is shortened due to the barrel effect of the battery pack. In extreme cases, the battery is overcharged or overdischarged, which may even cause a safety accident. 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 echelon utilization of retired batteries to overcome or at least partially solve the above problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a echelon utilization method of a retired battery on one hand, which comprises the following steps:
the automatic transmission equipment is used for transmitting the retired battery to a designated position of the energy storage system;
the H-bridge circuit is used for connecting the ex-service battery which is transmitted in place with the energy storage system;
and carrying out 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 in-phase balance and inter-phase balance.
Further, the transferring the retired battery to a designated position of the energy storage system by using the automatic transfer equipment comprises:
and detecting whether the retired battery is transferred in place by using a position sensor of the automatic transfer equipment so as to realize point-to-point transfer of the retired battery.
Further, the H-bridge circuit connecting the ex-service battery transferred in place with an energy storage system includes:
firstly, a bypass switch of the H-bridge circuit connected with the alternating current loop is closed, so that alternating current loop current of the energy storage system does not flow through the H-bridge circuit, then the H-bridge circuit is disconnected with the alternating current loop, and after the decommissioned battery is connected with the H-bridge circuit, the connection between the H-bridge circuit and the alternating current loop and the disconnection between the bypass switch are sequentially recovered.
Further, the performing SOC balance management on the connected retired battery 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 according to the obtained difference, superposing the deviation 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:
and comparing the SOC value of the retired battery with a preset SOC limit value, and if the SOC value of the retired battery is lower than the SOC limit value, replacing the retired battery.
Further, the intra-phase equalization specifically includes:
calculating the capacity difference value delta C of each retired battery in each phase by the following formulaij；
Wherein, CijFor batteries out of serviceCapacity, N is the number of the retired batteries in each phase, and i and j are the number of phases and the number of stages respectively;
making the capacity difference Delta C of each retired batteryijAnd multiplying the modulated sine waves of the H-bridge circuits connected with the retired batteries to obtain a modulated wave with capacity information of the retired batteries.
Further, the interphase balance specifically includes:
the zero sequence voltage is calculated by the following formula
Sum capacity zero voltage vector magnitude
Wherein, K2For the balance coefficient, Δ C is the difference between the sub-module capacity of each phase and the average inter-phase capacity, and Δ SOC is the SOC of each phaseiThe magnitude of the difference from the mean SOC between the phases,
zero voltage initial phase, ω t grid voltage phase,
balancing zero vector initial phase angles for the superposed capacities;
zero sequence voltage
Sum capacity zero voltage vector magnitude
Is superimposed on each otherObtaining the modulation voltage of each phase on the total phase voltage modulation wave
Wherein,
the wave is modulated for each phase total voltage.
Further, the method 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 the automatic conveying equipment.
In another aspect, the present invention discloses a device for echelon utilization of retired batteries, the device 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 ex-service battery which is transmitted in place with an H-bridge circuit of the energy storage system;
and the SOC equalizer is used for carrying out SOC balance management on the connected retired battery so that the retired battery works in charging or discharging in the energy storage system, and the SOC balance management comprises in-phase balance and inter-phase balance.
Furthermore, the automatic conveying equipment is provided with a position sensor, and the automatic conveying equipment detects whether the retired battery is conveyed in place by using the position sensor so as to realize point-to-point conveying of the retired battery.
The invention has the advantages and beneficial effects that:
in the echelon utilization method, the retired battery is conveyed to the position to be replaced of the battery in the energy storage system in a flow line mode through the automatic conveying equipment, so that the intelligent replacement of the battery can be realized, and the replacement efficiency and the replacement safety are improved; in addition, in the method, the SOC balance management is carried out on the retired battery, so that the difference among small single batteries in the energy storage system can be reduced, the service life of the retired battery can be prolonged to the maximum extent, and the recycle of the retired battery is 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 refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a diagram illustrating steps performed in a method for cascading retired batteries according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of an implementation of a method for echelon utilization of retired batteries in accordance with an embodiment of the present invention;
FIG. 3 is a diagram of a connection structure of an H-bridge circuit in an embodiment of the invention;
FIG. 4 is a schematic diagram of SOC balancing management for a retired battery according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the in-phase equalization of an energy storage system in one embodiment of the present invention;
FIG. 6 is a schematic diagram of phase-to-phase equalization of an energy storage system in an embodiment of the present invention;
FIG. 7 is a schematic diagram of an apparatus for echelon utilization of retired batteries in accordance with an embodiment of the present invention;
FIG. 8 is a schematic diagram of an apparatus for echelon utilization of retired batteries in accordance with an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a device for echelon utilization of retired batteries according to 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 described in detail and fully with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
One embodiment of the present invention discloses a method for echelon utilization of retired batteries, as shown in fig. 1, the method includes the following steps:
Step 2, connecting the ex-service battery which is transmitted in place with an H-bridge circuit of the energy storage system; after the retired battery is conveyed to the designated position, the retired battery is connected to an H-bridge circuit of the energy storage system, and the connection process can be achieved 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 the energy storage system, wherein the SOC balance management comprises in-phase balance and interphase balance.
In conclusion, in the echelon utilization method of the embodiment, the retired battery is conveyed to the position to be replaced of the battery in the energy storage system in a pipeline mode through the automatic conveying equipment, so that the intelligent replacement of the battery can be realized, and the battery replacement efficiency and safety are improved; in addition, in the method, the difference among the 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 retired battery can be recycled effectively.
In one embodiment, transferring the retired battery to a designated location of the energy storage system using an automated transfer device includes:
utilize automatic transfer apparatus's position sensor, detect whether retired battery conveys to target in place to realize the point-to-point conveying of retired battery, and then improve retired battery's transfer efficiency, the retired battery of being convenient for carries out intelligent change. The position sensor can be directly arranged on the automatic conveying equipment or on an H-bridge circuit of 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 for connecting a retired battery in place with an energy storage system, comprises:
firstly, the H-bridge circuit is connected with a bypass switch k of an alternating current loop1Closing the H-bridge circuit to make the AC loop current of the energy storage system not flow through the H-bridge circuit any more, and completely disconnecting the H-bridge circuit from the AC loop, i.e. opening the switch k2(ii) a After the decommissioned 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, namely the switch k is firstly closed2Then switch k is turned off1And the retired battery is connected to an alternating current loop of the energy storage system through the H-bridge circuit, so that the retired battery is charged or discharged.
In one embodiment, the SOC equalization management of the connected retired battery 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 is generated according to the obtained difference, and the deviation is superimposed on a modulated sine wave of an H-bridge circuit connected to the retired battery to control the charging or discharging rate of the retired battery. By carrying out SOC balance management on each retired battery on the energy storage system, the electric quantity of each retired battery can be balanced and adjusted, the difference among the single batteries is overcome, the retired batteries are charged or discharged synchronously, and the charging and discharging consistency of the retired batteries is ensured.
Further, the echelon utilization method of the retired battery further comprises the following steps:
in order to prevent the batteries with poor energy storage capacity in the retired batteries from influencing the operation of an energy storage system, the SOC value of the retired batteries is compared with a preset SOC limit value, and if the SOC value of the retired batteries is lower than the SOC limit value, the retired batteries are replaced.
In one embodiment, as shown in fig. 5, the intra-phase equalization is specifically:
calculating the capacity difference value delta C of each retired battery in each phase by the following formulaij。
Wherein, CijFor the capacity of the retired battery, N is the number of retired batteries in each phase, and i and j are the number of phases and the number of stages, respectively.
Make the capacity difference Delta C of each retired batteryijAnd multiplying the modulated sine waves of the H-bridge circuit connected with each retired battery to obtain a modulated wave with retired battery capacity information.
The in-phase equalization is specifically: the control of the charging and discharging power of each retired battery, namely the control of the charging and discharging speed of each retired battery is realized by reasonably controlling the current of each retired battery in a phase. In the SOC balance control, the given current value of each retired battery is calculated according to the difference of the SOC, the control of the charging and discharging current of the retired batteries can be realized, further the SOC balance control among the retired batteries in the charging and discharging process is realized, the retired batteries are enabled to reach a full-charge or emptying state simultaneously, and the purpose of improving the utilization rate of the batteries in the energy storage system is realized.
In one embodiment, as shown in fig. 6, the interphase equalization specifically includes:
the zero sequence voltage is calculated by the following formula
Sum capacity zero voltage vector magnitude
Wherein, K2For the balance coefficient, Δ C is the difference between the sub-module capacity of each phase and the average inter-phase capacity, and Δ SOC is the SOC of each phaseiThe magnitude of the difference from the mean SOC between the phases,
zero voltage initial phase, ω t grid voltage phase,
the zero vector initial phase angle is equalized for the superimposed capacity.
Zero sequence voltage
Sum capacity zero voltage vector magnitude
Superposed on the total voltage modulation wave of each phase to obtain the modulation voltage of each phase
Wherein,
the wave is modulated for each phase total voltage.
The interphase balance is specifically as follows: the energy storage system adopts the in-phase SOC balance control, which can only ensure that the SOC balance among the retired batteries in each phase is realized, and the average SOC of the retired batteries among three phases still has possible difference. Therefore, it is necessary to balance the SOC of each of the retired batteries between phases while performing the SOC balance control between phases. The 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, the three-phase power balance state of the power grid side is kept and the electric energy quality of the power grid side is not influenced on the premise of unbalanced three-phase power of the battery side. Therefore, the total power of the batteries of the three phases can be controlled by adopting a zero sequence voltage injection mode to carry out interphase SOC balance control, and a reasonable zero sequence voltage is calculated according to the SOC difference, so that one phase with smaller average SOC has larger charging power, and one phase with larger average SOC has smaller charging power in the charging process of the energy storage system; the opposite is true during discharge.
In a preferred embodiment, the method for echelon utilization of retired batteries further comprises:
and when the batteries to be retired are charged or discharged to a preset state, the batteries to be retired are dismounted from the energy storage system and are 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 contain the excessive electric energy, the retired battery charged to a preset state can be detached from the energy storage system, the retired battery is transported away from the energy storage system through automatic conveying equipment, and then the retired battery with the empty electricity is transferred 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 charged. When the electric energy in the power grid is insufficient, the retired battery on the energy storage system cannot supplement the insufficient electric energy, the retired battery which is discharged to the preset state can be detached from the energy storage system, the retired battery is conveyed away from the energy storage system through automatic conveying equipment, then the fully-charged retired battery is conveyed to the vacant position of the battery on the energy storage system, the retired battery is connected with the H-bridge circuit, and discharging of the retired battery is achieved. 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 device 700 for echelon utilization of retired batteries is disclosed, as shown in fig. 7, the device 700 comprising:
and the automatic conveying equipment 710 is used for conveying the retired battery to a specified position of the energy storage system.
And the connection controller 720 is used for connecting the ex-service battery which is transmitted in place with the H-bridge circuit of the energy storage system.
And the SOC equalizer 730 is used for performing SOC equalization management on the connected retired battery to enable the retired battery to charge or discharge in the energy storage system, and the SOC equalization management includes intra-phase equalization and inter-phase equalization.
Preferably, the automatic transfer device 710 is provided with a position sensor, and the automatic transfer device detects whether the retired battery is transferred in place by using the position sensor, so as to realize the point-to-point transfer of the retired battery.
In one embodiment, a connection controller 720 for connecting ex-service batteries in place with an H-bridge circuit of an energy storage system includes:
the method comprises the steps of firstly closing a bypass switch of an H-bridge circuit connected with an alternating current loop to enable alternating current loop current of an energy storage system not to flow through the H-bridge circuit, then completely disconnecting the H-bridge circuit from the alternating current loop, and after connecting a decommissioned battery with the H-bridge circuit, sequentially restoring connection between the H-bridge circuit and the alternating current loop and disconnection of the bypass switch.
In one embodiment, the SOC equalizer 730 is configured to detect the SOC value of the retired battery, differentiate the SOC value of the retired battery from 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 the charging or discharging rate of the retired battery.
In one embodiment, as shown in fig. 8, the apparatus 700 for echelon utilization of retired batteries further comprises:
and the comparison controller 740 is configured to compare the SOC value of the retired battery with a preset SOC limit value, and if the SOC value of the retired battery is lower than the SOC limit value, replace the retired battery.
Further, the intra-phase equalization specifically includes:
calculating the capacity difference value delta C of each retired battery in each phase by the following formulaij。
Wherein, CijFor the capacity of the retired battery, N is the number of retired batteries in each phase, and i and j are the number of phases and the number of stages, respectively.
Make the capacity difference Delta C of each retired batteryijAnd multiplying the modulated sine waves of the H-bridge circuit connected with each retired battery to obtain a modulated wave with retired battery capacity information.
Further, the interphase balance specifically is:
the zero sequence voltage is calculated by the following formula
Sum capacity zero voltage vector magnitude
Wherein, K2For the balance coefficient, Δ C is the difference between the sub-module capacity of each phase and the average inter-phase capacity, and Δ SOC is the SOC of each phaseiThe magnitude of the difference from the mean SOC between the phases,
zero voltage initial phase, ω t grid voltage phase,
the zero vector initial phase angle is equalized for the superimposed capacity.
Zero sequence voltage
Sum capacity zero voltage vector magnitude
Superposed on the total voltage modulation wave of each phase to obtain the modulation voltage of each phase
Wherein,
the wave is modulated for each phase total voltage.
In one embodiment, the automatic conveying equipment is used for detaching the retired battery from the energy storage system when the battery to be retired is charged or discharged to a preset state, and conveying the battery to be retired away from a specified position through the automatic conveying equipment.
One embodiment of the invention discloses a echelon utilization device of a retired battery, which comprises: a processor; and a memory arranged to store computer executable instructions that, when executed, cause the processor to perform any of the above described methods of echelon utilization of retired batteries.
Fig. 9 is a schematic structural diagram of a device for echelon utilization of retired batteries according to an embodiment of the present application. Referring to fig. 9, at the hardware level, the apparatus for echelon utilization of 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, such as at least 1 disk Memory. Of course, the retired battery echelon utilization device may also include hardware needed for other services.
The processor, the network interface, and the memory may be connected to each other via an internal bus, which may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 9, but this does not indicate 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 both memory and non-volatile storage and provides instructions and data to the processor.
The processor reads the corresponding computer program from the nonvolatile memory into the memory and then runs the computer program to form the target detection device on a logic level. The processor is used for executing the program stored in the memory and is specifically used for executing the following operations:
and conveying the retired battery to a designated position of the energy storage system by using automatic conveying equipment.
And the H-bridge circuit is used for connecting the ex-service battery which is transmitted in place with the energy storage system.
And carrying out 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 in-phase balance and interphase balance.
The above-described method for echelon utilization of retired batteries according to the embodiment shown in 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 instructions in the form of software. The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The various methods, steps, and logic blocks disclosed 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 directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.
Embodiments of the present application also provide a computer-readable storage medium storing one or more programs, where the one or more programs include instructions, which when executed by a retired battery ladder utilization device including multiple application programs, enable the retired battery ladder utilization device to perform the retired battery ladder utilization method in the embodiment shown in fig. 1, and are specifically configured to perform:
and conveying the retired battery to a designated position of the energy storage system by using automatic conveying equipment.
And the H-bridge circuit is used for connecting the ex-service battery which is transmitted in place with the energy storage system.
And carrying out 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 in-phase balance and interphase balance.
As will be appreciated by one skilled in the art, 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
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 computer storage media 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 that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include transitory computer readable media (transmyedia) 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, 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 above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (10)
1. A echelon utilization method of retired batteries is characterized by comprising the following steps:
the automatic transmission equipment is used for transmitting the retired battery to a designated position of the energy storage system;
the H-bridge circuit is used for connecting the ex-service battery which is transmitted in place with the energy storage system;
and carrying out 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 in-phase balance and inter-phase balance.
2. The method for echelon utilization of claim 1, wherein the utilizing automated transfer equipment to transfer the retired battery to a designated location of the energy storage system comprises:
and detecting whether the retired battery is transferred in place by using a position sensor of the automatic transfer equipment so as to realize point-to-point transfer of the retired battery.
3. The echelon utilization method of claim 1, wherein the H-bridge circuit connecting the ex-service battery transferred in place with an energy storage system comprises:
firstly, a bypass switch of the H-bridge circuit connected with the alternating current loop is closed, so that alternating current loop current of the energy storage system does not flow through the H-bridge circuit, then the H-bridge circuit is disconnected with the alternating current loop, and after the decommissioned battery is connected with the H-bridge circuit, the connection between the H-bridge circuit and the alternating current loop and the disconnection between the bypass switch are sequentially recovered.
4. The echelon utilization method of claim 1, wherein the performing SOC balance management on the retired battery after connection comprises:
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 according to the obtained difference, superposing the deviation 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 echelon utilization method of claim 4, further comprising:
and comparing the SOC value of the retired battery with a preset SOC limit value, and if the SOC value of the retired battery is lower than the SOC limit value, replacing the retired battery.
6. The echelon utilization method of claim 1, wherein the intra-phase equalization is specifically:
calculating the capacity difference value delta C of each retired battery in each phase by the following formulaij；
Wherein, CijThe capacity of the retired battery is N, the number of the retired batteries in each phase is N, and i and j are the number of phases and the number of stages respectively;
making the capacity difference Delta C of each retired batteryijAnd multiplying the modulated sine waves of the H-bridge circuits connected with the retired batteries to obtain a modulated wave with capacity information of the retired batteries.
7. The echelon utilization method according to claim 1, wherein the inter-phase equalization is specifically:
the zero sequence voltage is calculated by the following formula
Sum capacity zero voltage vector magnitude
Wherein, K2For the balance coefficient, Δ C is the difference between the sub-module capacity of each phase and the average inter-phase capacity, and Δ SOC is the SOC of each phaseiThe magnitude of the difference from the mean SOC between the phases,
zero voltage initial phase, ω t grid voltage phase,
balancing zero vector initial phase angles for the superposed capacities;
zero sequence voltage
Sum capacity zero voltage vector magnitude
Superposed on the total voltage modulation wave of each phase to obtain the modulation voltage of each phase
Wherein,
the wave is modulated for each phase total voltage.
8. The echelon utilization method of any one of claims 1-7, further comprising:
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 the automatic conveying equipment.
9. An apparatus for echelon utilization of ex-service 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 ex-service battery which is transmitted in place with an H-bridge circuit of the energy storage system;
and the SOC equalizer is used for carrying out SOC balance management on the connected retired battery so that the retired battery works in charging or discharging in the energy storage system, and the SOC balance management comprises in-phase balance and inter-phase balance.
10. The apparatus of claim 9, wherein the automatic transfer device is provided with a position sensor, and the automatic transfer device detects whether the retired battery is transferred in place by using the position sensor so as to realize point-to-point transfer of the retired battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110367842.0A CN113054713B (en) | 2021-04-06 | 2021-04-06 | Method and device for gradient utilization of retired battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110367842.0A CN113054713B (en) | 2021-04-06 | 2021-04-06 | Method and device for gradient utilization of retired battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113054713A true CN113054713A (en) | 2021-06-29 |
| CN113054713B CN113054713B (en) | 2024-05-10 |
Family
ID=76517590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110367842.0A Active CN113054713B (en) | 2021-04-06 | 2021-04-06 | Method and device for gradient utilization of retired battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113054713B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964400A (en) * | 2021-09-09 | 2022-01-21 | 珠海朗尔电气有限公司 | Retired battery pretreatment discharging method and system |
| CN114629195A (en) * | 2022-01-17 | 2022-06-14 | 国网吉林省电力有限公司经济技术研究院 | Partial power flexible grouping system for gradient battery utilization |
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 |
|---|
| 李凯: "H桥级联型储能***模块化独立控制研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》, 15 January 2019 (2019-01-15), pages 12 - 15 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113964400A (en) * | 2021-09-09 | 2022-01-21 | 珠海朗尔电气有限公司 | Retired battery pretreatment discharging method and system |
| CN113964400B (en) * | 2021-09-09 | 2024-05-28 | 珠海朗尔电气有限公司 | Retired battery pretreatment discharging method and system |
| CN114629195A (en) * | 2022-01-17 | 2022-06-14 | 国网吉林省电力有限公司经济技术研究院 | Partial power flexible grouping system for gradient battery utilization |
| CN114629195B (en) * | 2022-01-17 | 2024-02-09 | 国网吉林省电力有限公司经济技术研究院 | Partial power flexible grouping system for gradient utilization battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113054713B (en) | 2024-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11616375B2 (en) | Rechargeable battery systems and rechargeable battery system operational methods | |
| CN113054713B (en) | Method and device for gradient utilization of retired battery | |
| WO2016123969A1 (en) | Storage battery device, and charging-discharging monitoring method, device and system thereof | |
| US8773068B2 (en) | Rechargeable battery systems and rechargeable battery system operational methods | |
| US9007025B2 (en) | Systems and methods for configuring and charging hybrid battery systems | |
| RU2546978C2 (en) | Battery and battery control system | |
| US8922167B2 (en) | Rechargeable battery systems and rechargeable battery system operational methods | |
| US20120200260A1 (en) | System for electric grid balancing and method of using and providing the same | |
| CN101657782B (en) | Multi-battery charging system and method | |
| EP2919346B1 (en) | Device and method for managing battery, including malfunction prevention algorithm | |
| JP2021506207A (en) | Communication system and method between BMS | |
| CN115603351B (en) | Energy storage system processing method and device, processor and electronic equipment | |
| CN115332653B (en) | Self-adaptive random series-parallel battery system | |
| WO2012171197A1 (en) | Apparatus and method for equalizing controlling lithium battery | |
| CN107785967A (en) | Accumulation power supply system capacity balance control method, control device and equalizing system | |
| EP4229737A1 (en) | Multi-bay charger with power monitoring for optimized charging | |
| CN108233474A (en) | A kind of batteries in parallel connection group Current limited Control system and control method | |
| CN113602134A (en) | Charging pile identification method and device, terminal equipment and storage medium | |
| CN112666477A (en) | Method for determining short circuit in battery, electronic device, and storage medium | |
| WO2023065574A1 (en) | Lithium battery system, control method and apparatus, and storage medium and processor | |
| JPH05111171A (en) | Hybrid charger | |
| CN106233568A (en) | A kind of charger is from ring detection method and device | |
| CN113581011B (en) | Battery charge and discharge control system, method and device | |
| CN114744719A (en) | Protection method, device and system for energy storage management system | |
| WO2023211381A1 (en) | A charger for charging multiple battery packs and methods for operating the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |