CN217216029U - Battery energy storage system for finely regulating and controlling battery cluster - Google Patents
Battery energy storage system for finely regulating and controlling battery cluster Download PDFInfo
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- CN217216029U CN217216029U CN202220259831.0U CN202220259831U CN217216029U CN 217216029 U CN217216029 U CN 217216029U CN 202220259831 U CN202220259831 U CN 202220259831U CN 217216029 U CN217216029 U CN 217216029U
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Abstract
The utility model relates to a battery energy storage system for finely regulating and controlling battery clusters, which adopts at least two battery clusters, each battery cluster corresponds to a converter, the output end of each converter is respectively connected with two groups of electric control switches, a direct current regulation and control bus and a battery cluster regulator, and battery units PACK are connected through the electric control switches, thereby forming a system framework for dynamically selecting the battery units PACK and independently carrying out electric quantity equalization, and the battery cluster regulator is connected with each battery monomer of each battery unit PACK connected in series in each battery cluster through a battery monitoring communication line, and forms an electric power path for selecting and independently regulating and controlling the corresponding battery units PACK to carry out electric quantity equalization through the two groups of electric control switches, thereby realizing finely regulating and controlling the battery clusters which are cut out by monitoring, equalizing and abnormal fault groups in series aiming at the battery monomers and the battery units PACK, refining the control granularity, and overcoming the unsafe risk generated by rough control in the prior art, the overall safe and efficient operation of the battery energy storage system is guaranteed.
Description
Technical Field
The utility model belongs to the technical field of the battery energy storage, concretely relates to battery energy storage system of regulation and control that becomes more meticulous in battery cluster.
Background
The battery energy storage system is composed of a plurality of small-capacity battery monomers which are connected in series and in parallel, the inconsistency of the electrical characteristics of the battery monomers is particularly prominent due to the defect of inconsistency of the electrical characteristics of the battery monomers, particularly batteries used for a period of time and retired batteries, and the battery energy storage system is different in installation and physical position and relatively fixed in connection and placement, so that the influence of the inconsistency on the charging and discharging electric quantity of the batteries is further increased, the short plate effect that the overall efficiency is reduced is caused when the battery energy storage system is charged and discharged, and the unsafe risk that the battery is overcharged or overdischarged and even detonated due to overlarge voltage and electric quantity deviation of individual batteries is easily caused. Therefore, the problem that the inconsistency of the battery cells in the energy storage system is dynamically reduced or at least not expanded in the operation of the energy storage system needs to be solved; particularly, when the abnormal faults of the batteries or the battery units are found, the battery monomers with the abnormal faults, the corresponding battery units and the battery pack strings are cut off in the minimum range, and the operation of the abnormal fault battery monomers, the corresponding battery units and the battery pack strings is stopped, so that the occurrence of malignant accidents is avoided; on the premise of guaranteeing safe operation, the influence caused by the inconsistency of the single batteries is solved, and the availability and the operation efficiency of the energy storage system are improved.
In this regard, the industry engineers continue to develop and practice solutions, such as: the patent number of an invention patent of a battery cluster balance energy storage system and a control method thereof published by the national intellectual property office is CN113437780, the technical scheme aims at reducing the system cost, monitors the battery clusters and balances the electric quantity so as to reduce the inconsistency among the battery clusters, and the system scheme has obvious defects which are highlighted as follows:
1) the scheme aims to obtain the balance parameters of each battery cluster, judge whether the difference value between the balance parameters of each battery cluster is greater than or equal to a preset threshold value, and adjust the charging power of the battery cluster, namely: the charging power is reduced when the electric quantity or voltage of the battery cluster is higher, and the charging power is increased when the electric quantity or voltage of the battery cluster is lower, because the deviation of the electric quantity or voltage of a single battery in the battery energy storage system is not equal to the deviation of the battery cluster, the charging or discharging power is increased for the battery cluster of which the deviation of the battery cluster is not over a threshold value, the risk of the over-range operation of the single battery with large deviation can be caused, and the damage can be caused to the corresponding single battery until the fault and the risk are caused.
The scheme is directed at a system architecture for balancing the battery cluster, monitoring, balancing and protecting the battery monomer and the battery unit are omitted, and abnormity and faults of the battery monomer and the battery unit cannot be effectively controlled in time, so that cost reduction is achieved on the basis of safety sacrifice, and safe and efficient operation of a battery energy storage system is not facilitated.
In order to overcome the defect of above-mentioned scheme and solve above-mentioned technical problem, the utility model discloses an adjustable balanced direct current generating line and dynamic selection battery PACK carry out independent balanced system architecture, and every battery PACK only increases an electric control switch, can realize to battery monomer and battery PACK control, balanced and control abnormal fault battery and the battery cluster that the group cluster was cut out become more meticulous the regulation and control, has ensured battery energy storage system whole safety, high-efficient operation.
Disclosure of Invention
The utility model particularly discloses a battery energy storage system of regulation and control that becomes more meticulous in battery cluster, a serial communication port, include: the system comprises at least two battery clusters, a converter corresponding to each battery cluster, and a controller for each converter, wherein the output end of each converter is respectively connected with two groups of electric control switches, a 1 st direct current regulation and control bus, a 2 nd direct current regulation and control bus and a battery cluster; wherein:
each battery cluster is formed by serially connecting a plurality of battery units PACK;
the first side of each converter is respectively connected with a corresponding power supply;
the second side of each converter is respectively connected with a 1 st direct current regulation and control bus and a 2 nd direct current regulation and control bus through a 1 st group of switches, and is connected with two ends of each battery unit PACK connected in series in a battery cluster through a 2 nd group of electric control switches to form a battery energy storage series branch with the corresponding battery cluster; two ends of each battery energy storage series branch are connected in parallel;
the second-side positive electrode of each converter is respectively connected with the 1 st direct-current regulation and control bus and the 2 nd direct-current regulation and control bus through the 1 st electric control switch K11 and the 2 nd electric control switch K12 of the first group of switches;
the second side cathode of each converter is respectively connected with the 1 st direct current regulation and control bus and the 2 nd direct current regulation and control bus through a 3 rd electric control switch K13 and a 4 th electric control switch K14 of the first group of switches;
the 1 st direct current regulation and control bus is respectively connected with the positive electrode of the odd battery unit PACK in the corresponding battery cluster and the negative electrode of the last battery unit PACK through the 2 nd group of switches;
the 2 nd direct current regulation and control bus is respectively connected with the anodes of the even battery units PACK in the corresponding battery clusters through the 2 nd group of switches;
the battery cluster regulator is connected with each electric control switch K, the battery cluster positive switch and protection circuit, the battery cluster negative switch and protection circuit and each battery monomer in each battery unit PACK through a battery monitoring communication line.
The battery energy storage system for finely regulating and controlling the battery cluster is characterized in that two ends of each battery energy storage series branch are connected in parallel, an energy storage power converter is connected with a battery cluster positive electrode switch and a protection circuit, a battery cluster negative electrode switch and a protection circuit, an energy storage system positive electrode direct current bus and an energy storage system negative electrode direct current bus in sequence, and an energy storage system master control device is respectively connected with the converter, a battery cluster regulator and the energy storage power converter through an energy storage system master control communication line to form an energy storage system management and control path and an energy storage system for finely regulating and controlling the battery cluster.
The battery energy storage system for finely regulating and controlling the battery cluster is characterized in that each converter comprises: and the charging and discharging input and output capacity is connected with and controlled by the battery cluster regulator.
The battery energy storage system for finely regulating and controlling the battery cluster is characterized in that each power supply comprises: the ability to store and release electrical energy via the converter.
The battery energy storage system for refined regulation and control of the battery cluster is characterized in that each series branch comprises one battery cluster and one converter, the two ends of each battery unit PACK connected in series in the battery cluster are connected through a 1 st direct current regulation and control bus, a 2 nd direct current regulation and control bus and a plurality of 2 nd electric control switches, the battery cluster regulators connected through a battery monitoring communication line select and connect corresponding battery units PACKs, and the on-off of each electric control switch K is controlled, so that a control path and a framework for carrying out independent balance and maintenance on any battery unit PACK connected in series in the battery cluster are formed.
The battery energy storage system for finely regulating and controlling the battery clusters is characterized in that the energy storage system master control device monitors the operation parameters of each single battery of each battery unit PACK connected in series in each battery cluster in real time through a battery cluster regulator; when charging, the corresponding battery unit PACK where the battery monomer with higher electric quantity or voltage and exceeding the set threshold is located is connected with the converter through the selective control electric control switch, and the excess electric quantity is transmitted to the power supply; or, during discharging, the corresponding battery unit PACK where the battery monomer with low electric quantity or voltage exceeding the set threshold is located is connected with the converter through the selective control electric control switch, and the electric energy which is lack of the battery monomer is supplemented to the converter through the power supply, so that a regulation and control path for fine regulation and control of the battery cluster and quick balance of the electric quantity is formed.
The battery energy storage system for finely regulating and controlling the battery clusters is characterized in that the battery cluster regulator monitors the operation parameters of each single battery of each battery unit PACK connected in series in each battery cluster in real time, and when an abnormal fault single battery is monitored, the battery cluster regulator directly controls a positive switch of the battery cluster to be disconnected with a protection circuit and a negative switch of the battery cluster to be disconnected with the protection circuit through a battery monitoring communication line, so that a rapid protection control path for abnormal faults of the single batteries is formed.
The battery energy storage system for finely regulating and controlling the battery cluster is characterized in that when the converter is an ACDC converter, the AC side of the converter is used as the first side, and the connected power supply is an AC source; or, when the converter is a DCDC converter, the power source connected thereto is a direct current source.
The battery energy storage system for finely regulating and controlling the battery cluster is characterized by comprising at least one energy storage power converter, wherein two ends of each battery energy storage series branch are connected to the direct current side of the energy storage power converter in parallel.
The utility model relates to a battery energy storage system of regulation and control that becomes more meticulous in battery cluster, adopt adjustable balanced direct current generating line and the independent balanced system architecture of battery PACK dynamic selection, every battery PACK only increases an automatically controlled switch, each battery PACK of series connection each battery PACK in the battery cluster of regulator real-time supervision of battery cluster, and control two sets of automatically controlled switches, based on free health and safety monitoring of battery, accurate selection carries out the electric quantity with the corresponding battery PACK of independent regulation and control and balance, can realize carrying out to battery monomer and battery PACK control, the battery cluster that balanced and unusual trouble group cluster cut out becomes more meticulous in regulation and control, on the basis that the cost is equivalent, refine the quantity and control granularity, overcome the unsafe risk that the coarse control of prior art produced, battery energy storage system whole safety has been ensured, high-efficient operation.
Drawings
Fig. 1 is a schematic block diagram of a battery energy storage system with finely regulated battery clusters.
Fig. 2 is a schematic diagram of the same battery cluster and battery energy storage series branch, where fig. 2(a) is a schematic diagram of the battery cluster and fig. 2(b) is a schematic diagram of the battery energy storage series branch.
Detailed Description
As an embodiment, a battery energy storage system with refined regulation and control of a battery cluster is described with reference to the drawings, however, the described embodiment is a part of the embodiment, but not all of the embodiment, of the present invention applied to a battery energy storage system with refined regulation and control of a battery cluster. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention; the technology and the scheme of the utility model are not limited to the content given in this embodiment.
As shown in fig. 1-2, a battery energy storage system with finely controlled battery cluster is characterized by comprising: the system comprises at least two battery clusters (14), one converter (10) corresponding to each battery cluster, and a 1 st direct current regulation and control bus (11), a 2 nd direct current regulation and control bus (12), two groups of electric control switches and a battery cluster regulator (20) which are respectively connected with the output end of each converter (10); wherein:
each of the battery clusters (14) is formed by serially connecting a plurality of battery cells PACK (P), and as an embodiment example, as shown in fig. 2(a), the battery cluster (14) is formed by serially connecting the 1 st battery cell PACK (P1), the 2 nd battery cell PACK (2), the m-th battery cell PACK (pm), and the n-th battery cell PACK (pn);
the first side of each converter (10) is connected with a corresponding power supply (13);
the second sides of the converters (10) are respectively connected with a 1 st direct current regulation and control bus (11) and a 2 nd direct current regulation and control bus (12), and are connected with the two ends of each battery unit PACK (P) connected in series in a battery cluster (14) through a plurality of electric control switches, so that a battery energy storage series branch (40) is formed by the battery energy storage series branch and the corresponding battery cluster (14); two ends of each battery energy storage series branch (40) are connected in parallel;
the second side positive electrode of each converter (10) is respectively connected with a 1 st direct current regulation and control bus (11) and a 2 nd direct current regulation and control bus (12) through a 1 st electric control switch K11 and a 2 nd electric control switch K12 of a first group of switches;
the second side negative electrode of each converter (10) is respectively connected with a 1 st direct current regulation and control bus (11) and a 2 nd direct current regulation and control bus (12) through a 3 rd electric control switch K13 and a 4 th electric control switch K14 of a first group of switches;
the 1 st direct current regulation and control bus (11) is respectively connected with the positive electrodes of odd battery units PACK (P) in the corresponding battery clusters (14) and the negative electrodes of the last battery units PACK (P) through a plurality of switches;
the 2 nd direct current regulation and control bus (12) is respectively connected with the anodes of even battery units PACK (P) in the corresponding battery clusters (14) through a plurality of switches;
the battery cluster regulator (20) is connected with each electric control switch K, a battery cluster positive switch and protection circuit (22) and a battery cluster negative switch and protection circuit (23) through a battery monitoring communication line (21), and is connected with each battery monomer in each battery unit PACK (P); as an implementation example, as shown in fig. 1 and fig. 2(b), the cluster regulator (20) connects the 1 st cell PACK (P1), the 2 nd cell PACK (P2), the m-th cell PACK (pm), the n-th cell PACK (pn), the 1 st electrical control switch K11 of the first group of switches, the 2 nd electrical control switch K12 of the first group of switches, the 3 rd electrical control switch K13 of the first group of switches, the 4 th electrical control switch K14 of the first group of switches, the 1 st electrical control switch K21 of the 2 nd group, the 2 nd electrical control switch K22 of the 2 nd group, the m-th electrical control switch K2m of the 2 nd group, the n-th electrical control switch K2n of the 2 nd group, the (n +1) electrical control switch K2(n +1) of the 2 nd group, and the cluster positive switch and protection circuit (22) and the cluster negative switch and protection circuit (23) through the battery monitoring communication line (21), respectively.
As an implementation example, as shown in fig. 2(b), the second-side positive electrode of each inverter (10) is connected to the 1 st dc regulation bus (11) and the 2 nd dc regulation bus (12) through the 1 st electrically controlled switch K11 of the first group of switches and the 2 nd electrically controlled switch K12 of the first group of switches, respectively; the negative electrode of the second side of each converter (10) is respectively connected with a 1 st direct current regulation and control bus (11) and a 2 nd direct current regulation and control bus (12) through a 3 rd electric control switch K13 of the first group of switches and a 4 th electric control switch K14 of the first group of switches; the two ends of the 1 st electric control switch K21 of the 2 nd group and the m-th electric control switch K2m of the 2 nd group are respectively connected with the positive electrodes of the 1 st battery unit PACK (P1) and the m-th battery unit PACK (Pm) and the 1 st direct current regulation bus (11), and the two ends of the 2 nd electric control switch K22 of the 2 nd group and the n-th electric control switch K2n of the 2 nd group, wherein one end is respectively connected with the positive electrodes of the 2 nd battery unit PACK (P2) and the n-th battery unit PACK (Pn), and the other end is connected with the 2 nd direct current regulation bus (12), and the two ends of the (n +1) th electric control switch K2(n +1) of the 2 nd group are respectively connected with the negative electrode of the n-th battery unit PACK (Pn) and the 2 nd direct current regulation bus (12).
As an implementation example, as shown in fig. 1 and fig. 2(b), when the battery cluster regulator (20) selects the 1 st battery cell PACK (P1) for equalization and regulation, the battery cluster regulator (20) controls the 1 st electronic control switch K11 of the first group switch, the 4 th electronic control switch K14 of the first group switch, the 1 st electronic control switch K21 of the 2 nd group switch, and the 2 nd electronic control switch K22 of the 2 nd group switch to be closed, and controls the 2 nd electronic control switch K12 of the first group switch, the 3 rd electronic control switch K13 of the first group switch, the m-th electronic control switch K2m of the 2 nd group switch, the n-th electronic control switch K2n of the 2 nd group switch, and the (n +1) th electronic control switch K2(n +1) of the 2 nd group switch to be opened; when the battery cluster regulator (20) selects the 2 nd battery unit PACK (P2) for balancing and regulation, the battery cluster regulator (20) controls the 2 nd electric control switch K12 of the first group of switches, the 3 rd electric control switch K13 of the first group of switches, the 2 nd electric control switch K22 of the 2 nd group of switches, and the m-th electric control switch K2m of the 2 nd group of switches to be closed, and controls the 1 st electric control switch K11 of the first group of switches, the 4 th electric control switch K14 of the first group of switches, the 1 st electric control switch K21 of the 2 nd group of switches, the n-th electric control switch K2n of the 2 nd group of switches, and the (n +1) th electric control switch K2(n +1) of the 2 nd group of switches to be opened; when the battery cluster regulator (20) selects the mth battery unit pack (pm) for balancing and regulation, the battery cluster regulator (20) controls the electric control switches of the 1 st electric control switch K11, the 4 th electric control switch K14, the 2 nd m electric control switch K2m and the 2 nd electric control switch K2n of the first group of switches to be closed, and controls the electric control switches of the 2 nd electric control switch K12 of the first group of switches, the 3 rd electric control switch K13 of the first group of switches, the 1 st electric control switch K21 of the 2 nd group, the 2 nd electric control switch K22 of the 2 nd group and the (n +1) th electric control switch K2(n +1) of the 2 nd group of switches to be opened; when the battery cluster regulator (20) selects the nth battery unit pack (pn) for balancing and regulation, the battery cluster regulator (20) controls the 2 nd electric control switch K12 of the first group of switches, the 3 rd electric control switch K13 of the first group of switches, the nth electric control switch K2n of the 2 nd group of switches, and the (n +1) th electric control switch K2(n +1) of the 2 nd group of switches to be closed, and controls the 1 st electric control switch K11 of the first group of switches, the 4 th electric control switch K14 of the first group of switches, the 1 st electric control switch K21 of the 2 nd group of switches, the 2 nd electric control switch K22 of the 2 nd group of switches, and the m-th electric control switch K2m of the 2 nd group of switches to be opened.
The battery energy storage system for the refined regulation and control of the battery cluster is characterized in that two ends of each battery energy storage series branch (40) are connected in parallel, an energy storage power converter (50) is connected with a protection circuit (22) through a battery cluster positive electrode switch, a battery cluster negative electrode switch, a protection circuit (23), an energy storage system positive electrode direct current bus (51) and an energy storage system negative electrode direct current bus (52) in sequence, and an energy storage system master control device (30) is connected with the converter (10), a battery cluster regulator (20) and the energy storage power converter (50) through an energy storage system master control communication line (31) respectively to form an energy storage system control path and the energy storage system for the refined regulation and control of the battery cluster.
The battery energy storage system for finely regulating and controlling the battery cluster is characterized in that each converter (10) comprises: and the charging and discharging input and output capacity is connected with and controlled by a battery cluster regulator (20).
The battery energy storage system for finely regulating and controlling the battery cluster is characterized in that each power supply (13) comprises: the ability to store and release electrical energy via the converter (10) is controlled.
The battery energy storage system for finely regulating and controlling the battery clusters is characterized in that each series branch comprises one battery cluster and one converter, the converters are connected with two ends of each battery unit PACK (P) connected in series in the battery clusters (14) through a 1 st direct current regulation and control bus (11), a 2 nd direct current regulation and control bus (12) and a plurality of electric control switches, and a battery cluster regulator (20) connected through a battery monitoring communication line (21) is used for controlling the on-off of each electric control switch K and selecting and connecting corresponding battery units PACK (P) to form a control path and a framework for independently balancing and maintaining any battery unit PACK (P) connected in series in the battery clusters (14).
The battery energy storage system for finely regulating and controlling the battery clusters is characterized in that the energy storage system master control device (30) monitors the operation parameters of each battery cell PACK (P) of each battery unit connected in series in each battery cluster (14) in real time through the battery cluster regulator (20); when charging, the corresponding battery unit PACK (P) where the battery monomer with higher electric quantity or voltage and exceeding the set threshold is located is connected with the converter (10) through the selection control electric control switch, and the excess electric quantity is transmitted to the power supply (13); or when discharging, connecting the corresponding battery unit PACK (P) where the battery monomer with low electric quantity or voltage exceeding the set threshold is located with the converter (10) through the selective control electric control switch, and supplementing the lacking electric quantity with the power supply (13), thereby forming a regulation and control path for fine regulation and control of the battery cluster and quick balance of the electric quantity.
The battery energy storage system for finely regulating and controlling the battery cluster is characterized in that the battery cluster regulator (20) monitors the operation parameters of each battery cell PACK (P) of each battery unit connected in series in each battery cluster (14) in real time, and when abnormal fault battery cells are monitored, the battery cluster regulator (20) directly controls the disconnection of a battery cluster positive switch and a protection circuit (22) and a battery cluster negative switch and a protection circuit (23) through a battery monitoring communication line (21), so that a battery cell abnormal rapid protection control path is formed.
The battery energy storage system for finely regulating and controlling the battery cluster is characterized in that when the converter (10) is an ACDC converter, the AC side of the converter is taken as the first side, and the connected power supply is an AC source; or, when the converter (10) is a DCDC converter, the power source connected thereto is a direct current source.
The battery energy storage system for finely regulating and controlling the battery cluster is characterized by comprising at least one energy storage power converter (50), wherein two ends of each battery energy storage series branch (40) are connected to the direct current side of the energy storage power converter (50) in parallel.
The utility model relates to a battery energy storage system of regulation and control that becomes more meticulous in battery cluster, adopt adjustable balanced direct current generating line and the independent balanced system architecture of battery PACK dynamic selection, every battery PACK only increases an automatically controlled switch, each battery PACK (P) of establishing ties in battery cluster (14) of battery regulator (20) real-time supervision each battery PACK (14) each free operational parameter of battery, and control two sets of automatically controlled switches, accurate selection carries out the electric quantity with the corresponding battery PACK of independent regulation and control and balance, can realize to battery monomer and battery PACK control, the battery cluster that balanced and unusual trouble group cluster cut out becomes more meticulous in the cluster, on the basis that the cost is equivalent, refine the volume control granularity, overcome the unsafe risk that the coarse control of prior art produced, battery energy storage system whole safety has been ensured, high-efficient operation.
The specific embodiments are given above, but the present invention is not limited to the described embodiments. To those skilled in the art, according to the technical solution of the present invention, the configuration, formula, and parameters of various modifications are designed without the creative labor, and the changes, modifications, replacements, and modifications to the embodiments without departing from the principles and design framework of the present invention still fall within the protection scope of the present invention.
Claims (9)
1. A battery energy storage system for finely regulating and controlling a battery cluster is characterized by comprising: the system comprises at least two battery clusters, a converter corresponding to each battery cluster, and a controller for each converter, wherein the output end of each converter is respectively connected with two groups of electric control switches, a 1 st direct current regulation and control bus, a 2 nd direct current regulation and control bus and a battery cluster; wherein:
each battery cluster is formed by serially connecting a plurality of battery units PACK;
the first side of each converter is connected with a corresponding power supply;
the second side of each converter is respectively connected with a 1 st direct current regulation and control bus and a 2 nd direct current regulation and control bus through a 1 st group of switches, and is connected with two ends of each battery unit PACK connected in series in a battery cluster through a 2 nd group of electric control switches to form a battery energy storage series branch with the corresponding battery cluster; two ends of each battery energy storage series branch are connected in parallel;
the second-side positive electrode of each converter is respectively connected with the 1 st direct-current regulation and control bus and the 2 nd direct-current regulation and control bus through the 1 st electric control switch K11 and the 2 nd electric control switch K12 of the first group of switches;
the second side cathode of each converter is respectively connected with the 1 st direct current regulation and control bus and the 2 nd direct current regulation and control bus through a 3 rd electric control switch K13 and a 4 th electric control switch K14 of the first group of switches;
the 1 st direct current regulation and control bus is respectively connected with the positive electrode of the odd battery unit PACK in the corresponding battery cluster and the negative electrode of the last battery unit PACK through the 2 nd group of switches;
the 2 nd direct current regulating bus is respectively connected with the anodes of the even battery units PACK in the corresponding battery clusters through the 2 nd group of switches;
the battery cluster regulator is connected with each electric control switch K, the battery cluster positive switch and protection circuit, the battery cluster negative switch and protection circuit and each battery monomer in each battery unit PACK through a battery monitoring communication line.
2. The battery energy storage system for finely regulating and controlling the battery cluster according to claim 1, wherein two ends of each battery energy storage series branch are connected in parallel, and are connected with the energy storage power converter through the battery cluster positive switch and the protection circuit, the battery cluster negative switch and the protection circuit, and the energy storage system positive direct current bus and the energy storage system negative direct current bus in sequence, and the energy storage system master control device is respectively connected with the converter, the battery cluster regulator and the energy storage power converter through the energy storage system master control communication line, so as to form an energy storage system control path and a finely regulated and controlled battery cluster energy storage system.
3. The battery energy storage system of claim 1, wherein each of the converters comprises: and the charging and discharging input and output capacity is connected with and controlled by the battery cluster regulator.
4. The battery energy storage system according to claim 1, wherein each of the power sources comprises: the ability to store and release electrical energy via the converter.
5. The battery energy storage system according to claim 1, wherein each of the series branches comprises one of the battery clusters and one of the inverters, and the inverters connect two ends of each of the battery PACKs connected in series in the battery cluster through a 1 st dc regulation bus, a 2 nd dc regulation bus and a 2 nd set of a plurality of electronic control switches, and a battery cluster regulator connected through a battery monitoring communication line selects and connects a corresponding battery PACK to control on and off of each of the electronic control switches K, thereby forming a control path and a configuration for individually balancing and maintaining any battery PACK connected in series in the battery cluster.
6. The battery energy storage system for finely regulating and controlling the battery clusters according to claim 1, wherein the energy storage system master control device monitors the operation parameters of each battery cell of each battery unit PACK connected in series in each battery cluster in real time through a battery cluster regulator; when charging, the corresponding battery unit PACK where the battery monomer with higher electric quantity or voltage and exceeding the set threshold is located is connected with the converter through the selective control electric control switch, and the excess electric quantity is transmitted to the power supply; or when discharging, the corresponding battery unit PACK where the battery monomer with low electric quantity or voltage exceeding the set threshold is located is connected with the converter through the selective control electric control switch, and the electric energy which is lacked is supplemented to the converter by the power supply, so that a regulation and control path for fine regulation and control of the battery cluster and quick balance of the electric quantity is formed.
7. The battery energy storage system for battery cluster fine control according to claim 1, wherein the battery cluster controller monitors the operating parameters of each battery cell PACK connected in series in each battery cluster in real time, and when an abnormally faulty battery cell is monitored, the battery cluster controller directly controls the disconnection between the battery cluster positive switch and the protection circuit and between the battery cluster negative switch and the protection circuit through the battery monitoring communication line, so as to form a battery cell abnormal fault rapid protection control path.
8. The battery energy storage system for finely regulating the battery cluster according to claim 1, wherein when the converter is an ACDC converter, an ac side thereof is used as the first side, and the connected power source is an ac source; or, when the converter is a DCDC converter, the power source connected thereto is a direct current source.
9. The battery energy storage system for battery cluster fine control according to claim 2, wherein there is at least one energy storage power converter, and both ends of each battery energy storage series branch are connected in parallel to the dc side of the energy storage power converter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115360798A (en) * | 2022-10-19 | 2022-11-18 | 中安芯界控股集团有限公司 | Online balancing method for battery clusters in battery energy storage system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115360798A (en) * | 2022-10-19 | 2022-11-18 | 中安芯界控股集团有限公司 | Online balancing method for battery clusters in battery energy storage system |
| CN115360798B (en) * | 2022-10-19 | 2023-02-28 | 中安芯界控股集团有限公司 | Online balancing method for battery clusters in battery energy storage system |
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