CN116826879A - Battery module controller, battery cluster and energy storage system - Google Patents
Battery module controller, battery cluster and energy storage system Download PDFInfo
- Publication number
- CN116826879A CN116826879A CN202210115605.XA CN202210115605A CN116826879A CN 116826879 A CN116826879 A CN 116826879A CN 202210115605 A CN202210115605 A CN 202210115605A CN 116826879 A CN116826879 A CN 116826879A
- Authority
- CN
- China
- Prior art keywords
- battery
- controlled switch
- battery unit
- switching
- power line
- 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.)
- Pending
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 51
- 230000007704 transition Effects 0.000 claims abstract description 37
- 238000012544 monitoring process Methods 0.000 claims description 45
- 238000004891 communication Methods 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 12
- 238000007599 discharging Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000002597 Solanum melongena Nutrition 0.000 description 1
- 244000061458 Solanum melongena Species 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
According to the battery module controller, the battery cluster and the energy storage system, the battery units are arranged and controlled to be connected with a power line, the battery unit switching buffer transition power line and the battery unit switching power line to be switched on and off, and when the energy storage system is in operation, during charging, the battery or the battery unit with excessively high voltage or electric quantity deviation is temporarily charged, and the deviation is reduced to a normal range and then put into operation; during discharging, the battery or the battery unit with excessively low voltage or electric quantity deviation is temporarily discharged, and the deviation is reduced to a normal range and then is put into; cutting out the corresponding battery or battery unit when abnormal faults of the battery or battery unit are found; particularly, a transition structure of switching the battery unit is adopted by adopting a battery unit switching buffer transition power line, so that the switching does not cause short circuit or circuit breaking, and is disconnected after bypass, the risks of energy consumption and thermal runaway are not generated, the problem that the battery unit is dynamically switched on line is effectively solved, the on-line dynamic balance and maintenance are realized, and the safety and the efficiency of a battery energy storage system are improved.
Description
Technical Field
The invention belongs to the technical field of battery energy storage, and particularly relates to a battery module controller, a battery cluster and an energy storage system.
Background
The battery energy storage system is a battery pack formed by connecting a plurality of batteries with small electric quantity in series-parallel connection, and is connected into a power grid through an energy storage converter for charging and discharging. Because of unavoidable defects of the inconsistency of the battery monomers, particularly the inconsistency of the battery used for a period of time and the retired battery is particularly prominent, and the battery of the battery energy storage system is installed and physically positioned differently and is connected and placed relatively fixedly, the influence of the inconsistency on the charge and discharge electric quantity of the battery is further increased, the short plate effect of the overall efficiency reduction caused by the charge and discharge of the battery energy storage system is caused, and the unsafe risk of overcharge or overdischarge or even explosion of the battery is caused easily due to overlarge deviation of the voltage and the electric quantity of the individual battery. Therefore, the battery pack needs to be flexibly adjusted and dynamically maintained, the consistency of the voltage and the electric quantity of the battery and the battery pack string charge and discharge is ensured to be in a controllable range, the overcharge, the overdischarge and the short-circuit effect of the battery are avoided, the safety and the utilization rate of the battery energy storage system are improved, and the investment in receiving eggplant is improved.
The non-uniformity of the battery causes the safety and the use efficiency of the battery to be greatly affected. Therefore, in the operation of the energy storage system, the battery or the battery unit with excessively high voltage or electric quantity deviation is required to be charged in a suspending way, and the deviation is reduced to a normal range and then is put into charge; when the voltage or the battery unit with too low electric quantity deviation is discharged, the battery or the battery unit is temporarily discharged, the deviation is reduced to a normal range, and then the battery or the battery unit is put into discharge, so that the on-line electric quantity balance is realized; and cutting out the corresponding battery or battery unit when the abnormal fault of the battery or battery unit is found, and carrying out dynamic maintenance.
For this reason, industry engineers continue to develop and practice, and several solutions are proposed, such as: the invention patent number of patent CN113193628 of a battery unit, an energy storage system and a battery unit fault protection method published by the national intellectual property office, the technical scheme claims, the specification and the battery unit, the energy storage system and the battery unit fault protection method published and proposed by the attached figures 2-7 of the specification, the system and the system structure diagram designed by the published technical scheme, as the corresponding contents of claim 1, claim 2, claim 13, claim 14 and the specification of the scheme, can be seen by combining with the attached figures 1-4, the invention is characterized in that the abnormal fault battery unit passes through a bypass power line and a switch, and a switch for isolating and cutting out the fault battery unit from the battery unit string is arranged at the corresponding battery unit connecting end of the battery unit string, and the core is that the bypass power line is used for short-circuiting to replace the battery unit generating fault; the 40 th to 45 th sections of the specification give the relation and function of the design conception and the system components of the technical scheme and the corresponding control rules and methods; it is easy to see that the technical scheme has obvious defects:
first, the system architecture and the control method of the scheme are designed as the content corresponding to claim 1, claim 2 and claim 13, claim 14 and the description of the scheme, and are combined with fig. 1 to fig. 4 and fig. 6 and fig. 7. A kind of electronic device with a high-pressure air-conditioning system. Claim 13, claim 14. The substantial protection content thereof has serious defects, and the scheme is described in claim 1 that when the battery unit is detected to be faulty: triggering a first controllable switch in the battery unit to be disconnected, so that a circuit formed by connecting the battery unit and other battery units in series is opened; and triggering a second controllable switch in the battery unit to be closed, wherein the battery unit group string formed by connecting the failed battery unit and other battery units in series is opened, and the battery unit group string is disconnected with a direct current bus of the power conversion equipment, so that the power interruption of the power conversion equipment caused by the open circuit of the battery unit group string generates direct current side faults, and the power conversion equipment is stopped due to the faults.
Secondly, because the system architecture of the technical scheme adopts the system architecture that the battery unit is directly closed through the second controllable switch to conduct bypass conduction, the second controllable switch of the bypass can be closed only after the first controllable switch is opened, otherwise, the battery unit is enabled to form instant short circuit, and the serious accident of explosion of the battery caused by the short circuit is caused. Therefore, the technical scheme of the scheme right requires that' when the battery unit is detected to have faults: triggering a first controllable switch in the battery unit to be disconnected, so that a circuit formed by connecting the battery unit and other battery units in series is opened; and triggering a second controllable switch within the cell to close, thereby bypassing the cell; therefore, the scheme can not perform online switching on the battery units with large inconsistent deviation on line and can not realize online dynamic balancing and maintenance operation.
Disclosure of Invention
In order to overcome the defects of the prior art, the technical difficulties and problems are effectively solved. The invention provides a battery module controller, a battery cluster and an energy storage system, which are characterized in that the battery module controller comprises: the battery monitoring and switching control circuit, a battery unit connection power line, a 1 st battery unit switching buffer transition power line, a 1 st battery unit switching bypass power line, a 2 nd battery unit switching buffer transition power line, a 2 nd battery unit switching bypass power line, a communication and switching control line, a battery monitoring communication line, a 1 st battery unit connection terminal, a 1 st bypass connection terminal, a 2 nd battery unit connection terminal, a 2 nd bypass connection terminal, a 1 st communication interface and a 2 nd communication interface; wherein: the battery unit is connected with a power line, a 1 st battery unit switching bypass power line and a 2 nd battery unit switching bypass power line, and is respectively provided with a 1 st controlled switch K1, a 3 rd controlled switch K3, a 5 th controlled switch K5, a 1 st battery unit switching buffer transition power line and a 2 nd battery unit switching buffer transition power line, and is respectively provided with a 2 nd controlled switch K2 connected with a series matching resistor R1 and a 4 th controlled switch K4 connected with the series matching resistor R2;
the battery unit connection power line is characterized in that two ends of the battery unit connection power line are respectively connected with a 1 st battery unit connection terminal and a 2 nd battery unit connection terminal; the 1 st battery unit switching buffer transition power line is connected with the 1 st battery unit switching bypass power line in parallel, and the two ends of the 1 st battery unit switching buffer transition power line are respectively connected with the 1 st battery unit connecting terminal and the 2 nd bypass connecting terminal; the 2 nd battery unit switching buffer transition power line is connected with the 2 nd battery unit switching bypass power line in parallel, and two ends of the 2 nd battery unit switching buffer transition power line are respectively connected with the 1 st bypass connecting terminal and the 2 nd battery unit connecting terminal; the battery monitoring and switching control circuit is provided with a 1 st communication interface and is connected with a 1 st controlled switch K1, a 2 nd controlled switch K2, a 3 rd controlled switch K3, a 4 th controlled switch K4, a 5 th controlled switch K5 and a 2 nd communication interface through communication and switch control lines; thus, a battery module controller is constituted.
The battery module controller is respectively connected with a 1 st battery or a battery unit PACK and a 2 nd battery or a battery unit PACK, and the battery monitoring and switching control circuit is respectively connected with each single battery in the 1 st battery or the battery unit PACK and the 2 nd battery or the battery unit PACK through a 2 nd communication interface and a battery monitoring communication line to form a battery module for controlled switching and balanced protection;
the battery module is characterized in that the battery module with controlled switching and balanced protection is characterized in that a 1 st battery or battery cell PACK positive electrode or negative electrode is connected through a 1 st battery cell connecting terminal of a battery module controller, a 1 st battery or battery cell PACK negative electrode or positive electrode is connected through a 1 st bypass connecting terminal of the battery module controller, a 2 nd battery or battery cell PACK negative electrode or positive electrode is connected through a 2 nd battery cell connecting terminal of the battery module controller, a 2 nd battery or battery cell PACK positive electrode or negative electrode is connected through a 2 nd bypass connecting terminal of the battery module controller, and each single battery in the 1 st battery or battery cell PACK and the 2 nd battery or battery cell PACK is respectively connected through a battery monitoring communication line through a 2 nd communication interface.
The battery module controller, the battery cluster and the energy storage system are characterized in that the battery module with controlled switching and balanced protection is characterized in that a battery monitoring and switching control circuit controls a 1 st controlled switch K1 to be closed and conducted, and controls a 2 nd controlled switch K2, a 3 rd controlled switch K3, a 4 th controlled switch K4 and a 5 th controlled switch K5 to be disconnected, so that a 1 st battery or battery unit PACK and a 2 nd battery or battery unit PACK series power path are formed;
the battery monitoring and switching control circuit controls the 1 st controlled switch K1, the 2 nd controlled switch K2 and the 4 th controlled switch K4 to be disconnected, controls the 3 rd controlled switch K3 and the 5 th controlled switch K5 to be closed and conducted, and forms a parallel power path of the 1 st battery or battery unit PACK and the 2 nd battery or battery unit PACK, so as to form a redundant hot backup system structure of the battery unit;
the battery monitoring and switching control circuit controls the 5 th controlled switch K5 to be closed and turned on, controls the 1 st controlled switch K1, the 2 nd controlled switch K2, the 3 rd controlled switch K3 and the 4 th controlled switch K4 to be opened, and forms a 1 st battery or battery unit PACK bypass and a 2 nd battery or battery unit PACK series power path;
the battery monitoring and switching control circuit controls the 3 rd controlled switch K3 to be closed and turned on, controls the 1 st controlled switch K1, the 2 nd controlled switch K2, the 4 th controlled switch K4 and the 5 th controlled switch K5 to be opened, and forms a 2 nd battery or battery unit PACK bypass and a 1 st battery or battery unit PACK series power path.
The battery module controller, the battery cluster and the energy storage system are characterized in that in the normal operation process of the controlled switching and balanced protection of the 1 st battery or the battery unit PACK and the 2 nd battery or the battery unit PACK, a battery monitoring and switching control circuit sequentially controls the 4 th controlled switch K4 to be closed and conducted, controls the 1 st controlled switch K1 to be opened, controls the 5 th controlled switch K5 to be closed and conducted and controls the 4 th controlled switch K4 to be opened, so that a bypass switched-out power path for balancing and protecting the 1 st battery or the battery unit PACK is formed;
in the normal operation process of serial connection of the 1 st battery or battery unit PACK and the 2 nd battery or battery unit PACK, the battery monitoring and switching control circuit sequentially controls the 2 nd controlled switch K2 to be closed and conducted, controls the 1 st controlled switch K1 to be opened, controls the 3 rd controlled switch K3 to be closed and conducted and controls the 2 nd controlled switch K2 to be opened, so that a power path cut by a bypass of equalization and protection of the 2 nd battery or battery unit PACK is formed;
in the bypass operation process of balancing and protecting the 1 st battery or battery unit PACK, the battery monitoring and switching control circuit sequentially controls the 4 th controlled switch K4 to be closed and conducted, the 5 th controlled switch K5 to be opened, the 1 st controlled switch K1 to be closed and conducted and the 4 th controlled switch K4 to be opened to form a power path input after balancing and protecting the 1 st battery or battery unit PACK;
in the battery module for controlled switching and balanced protection, in the bypass operation process of balancing and protecting the 2 nd battery or battery unit PACK, a battery monitoring and switching control circuit sequentially controls the 2 nd controlled switch K2 to be closed and conducted, controls the 3 rd controlled switch K3 to be opened, controls the 1 st controlled switch K1 to be closed and conducted and controls the 2 nd controlled switch K2 to be opened, so that a power path input after balancing and protecting the 2 nd battery or battery unit PACK is formed.
The battery module controller, the battery cluster and the energy storage system are characterized in that at least 1 or more battery modules with controlled switching and balanced protection are connected with the cathodes of adjacent battery modules one by one, and the battery module cluster is formed by connecting the anodes of the battery modules of any 2 or more battery modules with controlled switching and balanced protection one by one.
The battery module controller, the battery cluster and the energy storage system are characterized in that at least 1 positive electrode and at least more than 1 negative electrode of the battery module cluster are connected in parallel with corresponding positive electrode direct current buses and corresponding negative electrode direct current buses respectively, the positive electrode direct current buses and the negative electrode direct current buses are connected into a power converter or a direct current power device, meanwhile, the energy storage system control device is connected with a 1 st communication interface arranged in a battery monitoring and switching control circuit in each battery module respectively through an energy storage system control communication line, and the battery module control path and the battery energy storage system are formed by connecting the power converter or the direct current power device.
According to the battery module controller, the battery cluster and the energy storage system, the battery units are arranged and controlled to be connected with a power line, the battery unit switching buffer transition power line and the battery unit switching power line to be switched on and off, when the energy storage system is in operation, during charging, the battery or the battery unit with excessively high voltage or electric quantity deviation is switched off to be charged temporarily, other battery units continue to be charged, and when the deviation is reduced to a normal range, the battery or the battery unit is put into operation again; during discharging, a battery or a battery unit with excessively low voltage or electric quantity deviation is cut out to suspend discharging, other battery units continue to operate discharging, and when the deviation is reduced to a normal range, the battery or the battery unit is put into operation; when abnormal faults of the battery or the battery unit are found, the corresponding battery or the battery unit is cut out, and maintenance is timely carried out and fault expansion is avoided; particularly, the connection and transition structure of the battery unit switching is carried out by adopting the battery unit switching buffer transition power line, so that the switching does not cause short circuit or circuit break, the battery unit switching buffer transition power line is disconnected after bypass, the risks of energy consumption and thermal runaway brought by the battery unit switching buffer transition power line are avoided, the dynamic switching of the battery unit on line is effectively solved, the dynamic balancing and maintenance on line are realized, and the safety and the efficiency of a battery energy storage system are improved.
Drawings
Fig. 1 is a schematic block diagram of the same battery module controller.
Fig. 2 is a schematic block diagram of the same controlled switching and equalization protected battery module.
Fig. 3 is a schematic block diagram of the same battery module group string cluster.
FIG. 4 is a schematic block diagram of a battery module controller, battery cluster, and energy storage system
Detailed Description
As an example, a battery module controller, a battery cluster, and an energy storage system are described with reference to the accompanying drawings, but the described embodiments are embodiments in which the present invention is applied to a part, but not all, of the battery module controller, the battery cluster, and the energy storage system. All other embodiments, based on the embodiments of the invention, which a person of ordinary skill in the art would obtain without inventive faculty, are within the scope of the invention; the technique and scheme of the present invention are not limited to those given in the present embodiment example.
As shown in fig. 1, a battery module controller, a battery cluster, and an energy storage system, wherein the battery module controller (100) includes: the battery monitoring and switching control circuit (10), the battery unit connecting power line (11), the 1 st battery unit switching buffer transition power line (12), the 1 st battery unit switching bypass power line (13), the 2 nd battery unit switching buffer transition power line (14), the 2 nd battery unit switching bypass power line (15), the communication and switching control line (17), the battery monitoring communication line (20), and the 1 st battery unit connecting terminal (F1), the 1 st bypass connecting terminal (Z1), the 2 nd battery unit connecting terminal (F2), the 2 nd bypass connecting terminal (Z2), the 1 st communication interface (T1) and the 2 nd communication interface (T2); wherein: the battery unit is connected with a power line (11), a 1 st battery unit switching bypass power line (13) and a 2 nd battery unit switching bypass power line (15), and a 1 st controlled switch K1, a 3 rd controlled switch K3, a 5 th controlled switch K5, a 1 st battery unit switching buffer transition power line (12) and a 2 nd battery unit switching buffer transition power line (14) are respectively arranged and connected with a 2 nd controlled switch K2 of a series matching resistor R1 and a 4 th controlled switch K4 of the series matching resistor R2;
the battery unit connection power line is characterized in that two ends of the battery unit connection power line (11) are respectively connected with a 1 st battery unit connection terminal (F1) and a 2 nd battery unit connection terminal (F2); a 1 st battery unit switching buffer transition power line (12) is connected with a 1 st battery unit switching bypass power line (13) in parallel, and two ends of the 1 st battery unit switching buffer transition power line are respectively connected with a 1 st battery unit connecting terminal (F1) and a 2 nd bypass connecting terminal (Z2); a 2 nd battery unit switching buffer transition power line (14) is connected with a 2 nd battery unit switching bypass power line (15) in parallel, and two ends of the 2 nd battery unit switching buffer transition power line are respectively connected with a 1 st bypass connecting terminal (Z1) and a 2 nd battery unit connecting terminal (F2); the battery monitoring and switching control circuit (10) is provided with a 1 st communication interface (T1) and is connected with a 1 st controlled switch K1, a 2 nd controlled switch K2, a 3 rd controlled switch K3, a 4 th controlled switch K4, a 5 th controlled switch K5 and a 2 nd communication interface (T2) through a communication and switch control line (17); the battery module controller (100) is constructed as described above.
As shown in fig. 1-2, the battery module controller (100) is connected with a 1 st battery or a battery unit PACK (P1) and a 2 nd battery or a battery unit PACK (P2), and the battery monitoring and switching control circuit (10) is connected with each single battery in the 1 st battery or the battery unit PACK (P1) and the 2 nd battery or the battery unit PACK (P2) through a 2 nd communication interface (T2) and a battery monitoring communication line (20) respectively to form a battery module (200) for controlled switching and balanced protection;
the battery module (200) is characterized in that the 1 st battery or battery cell connecting terminal (F1) of the battery module controller (100) is connected with the positive electrode or the negative electrode of the 1 st battery or battery cell PACK (P1), the 1 st bypass connecting terminal (Z1) of the battery module controller (100) is connected with the negative electrode or the positive electrode of the 1 st battery or battery cell PACK (P1), the 2 nd battery cell connecting terminal (F2) of the battery module controller (100) is connected with the negative electrode or the positive electrode of the 2 nd battery or battery cell PACK (P2), the 2 nd bypass connecting terminal (Z2) of the battery module controller (100) is connected with the positive electrode or the negative electrode of the 2 nd battery cell PACK (P2), and the 2 nd communication interface (T2) is respectively connected with the 1 st battery or battery cell PACK (P1) and each single battery in the 2 nd battery or battery cell PACK (P2) through a battery monitoring communication line (20).
1-2, the battery module controller, the battery cluster and the energy storage system are characterized in that the battery module (200) with controlled switching and balanced protection is controlled by a battery monitoring and switching control circuit (10) to switch on a 1 st controlled switch K1 and switch off a 2 nd controlled switch K2, a 3 rd controlled switch K3, a 4 th controlled switch K4 and a 5 th controlled switch K5, so as to form a serial power path of the 1 st battery or battery unit PACK (P1) and the 2 nd battery or battery unit PACK (P2);
the 1 st controlled switch K1, the 2 nd controlled switch K2 and the 4 th controlled switch K4 are controlled to be opened by a battery monitoring and switching control circuit (10), the 3 rd controlled switch K3 and the 5 th controlled switch K5 are controlled to be closed and conducted, a 1 st battery or battery unit PACK (P1) and a 2 nd battery or battery unit PACK (P2) are formed into a parallel power path, and a battery unit redundant hot backup system structure is formed;
the battery monitoring and switching control circuit (10) controls the 5 th controlled switch K5 to be closed and turned on, controls the 1 st controlled switch K1, the 2 nd controlled switch K2, the 3 rd controlled switch K3 and the 4 th controlled switch K4 to be opened, and forms a bypass of the 1 st battery or battery unit PACK (P1) and a serial power path of the 2 nd battery or battery unit PACK (P2);
the battery monitoring and switching control circuit (10) controls the 3 rd controlled switch K3 to be closed and turned on, and controls the 1 st controlled switch K1, the 2 nd controlled switch K2, the 4 th controlled switch K4 and the 5 th controlled switch K5 to be opened, so that a bypass of the 2 nd battery or battery unit PACK (P2) and a serial power path of the 1 st battery or battery unit PACK (P1) are formed.
As shown in fig. 1-2, the battery module controller, the battery cluster and the energy storage system are characterized in that, in the normal operation process of connecting the 1 st battery or the battery unit PACK (P1) and the 2 nd battery or the battery unit PACK (P2) in series, the battery monitoring and switching control circuit (10) sequentially controls the 4 th controlled switch K4 to be closed and turned on, controls the 1 st controlled switch K1 to be opened, controls the 5 th controlled switch K5 to be closed and turned on, and controls the 4 th controlled switch K4 to be opened, so as to form a power path of bypass cut of equalization and protection of the 1 st battery or the battery unit PACK (P1);
the battery module (200) for controlled switching and balanced protection sequentially controls the 2 nd controlled switch K2 to be closed and conducted, controls the 1 st controlled switch K1 to be opened, controls the 3 rd controlled switch K3 to be closed and conducted and controls the 2 nd controlled switch K2 to be opened by the battery monitoring and switching control circuit (10) in the normal operation process of connecting the 1 st battery or battery unit PACK (P1) and the 2 nd battery or battery unit PACK (P2) in series, so as to form a bypass-cut power path for balancing and protecting the 2 nd battery or battery unit PACK (P2);
in the bypass operation process of equalization and protection of the 1 st battery or battery unit PACK (P1), the battery monitoring and switching control circuit (10) sequentially controls the 4 th controlled switch K4 to be closed and conducted, the 5 th controlled switch K5 to be opened, the 1 st controlled switch K1 to be closed and conducted and the 4 th controlled switch K4 to be opened, so that an electric power path input after equalization and protection of the 1 st battery or battery unit PACK (P1) is formed;
in the bypass operation process of equalization and protection of the battery or the battery unit PACK (P2), the battery monitoring and switching control circuit (10) sequentially controls the closing and the conducting of the 2 nd controlled switch K2, the opening of the 3 rd controlled switch K3, the closing and the conducting of the 1 st controlled switch K1 and the opening of the 2 nd controlled switch K2, so that a power path input after equalization and protection of the 2 nd battery or the battery unit PACK (P2) is formed.
As shown in fig. 3, the battery module controller, the battery cluster and the energy storage system are characterized in that at least 1 or more battery modules (200) with controlled switching and balanced protection are connected one by one, and the positive electrodes (P11) of the battery modules (200) with the controlled switching and balanced protection and the negative electrodes (P22) of the adjacent battery modules are connected one by one to form a battery module group cluster (300).
As shown in fig. 4, the battery module controller, the battery cluster and the energy storage system are characterized in that at least 1 or more positive poles and negative poles of the battery module cluster (300) are connected in parallel to corresponding positive pole direct current buses (340) and negative pole direct current buses (350), the positive pole direct current buses (340) and the negative pole direct current buses (350) are connected to a power converter or a direct current power device (310), and meanwhile, the energy storage system control device (320) controls a communication line (330) through the energy storage system, and is connected with a 1 st communication interface (T1) arranged by a battery monitoring and switching control circuit (10) in each battery module (200) and is connected with the power converter or the direct current power device (310) respectively to form a battery energy storage control path and a battery energy storage system.
According to the battery module controller, the battery cluster and the energy storage system, the battery units are arranged and controlled to be connected with a power line, the battery unit switching buffer transition power line and the battery unit switching power line to be switched on and off, when the energy storage system is in operation, during charging, the battery or the battery unit with excessively high voltage or electric quantity deviation is switched off to be charged temporarily, other battery units continue to be charged, and when the deviation is reduced to a normal range, the battery or the battery unit is put into operation again; during discharging, a battery or a battery unit with excessively low voltage or electric quantity deviation is cut out to suspend discharging, other battery units continue to operate discharging, and when the deviation is reduced to a normal range, the battery or the battery unit is put into operation; when abnormal faults of the battery or the battery unit are found, the corresponding battery or the battery unit is cut out, and maintenance is timely carried out and fault expansion is avoided; particularly, the connection and transition structure of the battery unit switching is carried out by adopting the battery unit switching buffer transition power line, so that the switching does not cause short circuit or circuit break, the battery unit switching buffer transition power line is disconnected after bypass, the risks of energy consumption and thermal runaway brought by the battery unit switching buffer transition power line are avoided, the dynamic switching of the battery unit on line is effectively solved, the dynamic balancing and maintenance on line are realized, and the safety and the efficiency of a battery energy storage system are improved.
Specific embodiments are given above, but the invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various modifications, formulas, and parameters can be devised in accordance with the principles and concepts of the invention without the need for inventive faculty, and variations, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and concepts of the invention.
Claims (6)
1. A battery module controller, a battery cluster, and an energy storage system, wherein the battery module controller comprises: the battery monitoring and switching control circuit, a battery unit connection power line, a 1 st battery unit switching buffer transition power line, a 1 st battery unit switching bypass power line, a 2 nd battery unit switching buffer transition power line, a 2 nd battery unit switching bypass power line, a communication and switching control line, a battery monitoring communication line, a 1 st battery unit connection terminal, a 1 st bypass connection terminal, a 2 nd battery unit connection terminal, a 2 nd bypass connection terminal, a 1 st communication interface and a 2 nd communication interface; wherein: the battery unit is connected with a power line, a 1 st battery unit switching bypass power line and a 2 nd battery unit switching bypass power line, and is respectively provided with a 1 st controlled switch K1, a 3 rd controlled switch K3, a 5 th controlled switch K5, a 1 st battery unit switching buffer transition power line and a 2 nd battery unit switching buffer transition power line, and is respectively provided with a 2 nd controlled switch K2 connected with a series matching resistor R1 and a 4 th controlled switch K4 connected with the series matching resistor R2;
the battery unit connection power line is characterized in that two ends of the battery unit connection power line are respectively connected with a 1 st battery unit connection terminal and a 2 nd battery unit connection terminal; the 1 st battery unit switching buffer transition power line is connected with the 1 st battery unit switching bypass power line in parallel, and the two ends of the 1 st battery unit switching buffer transition power line are respectively connected with the 1 st battery unit connecting terminal and the 2 nd bypass connecting terminal; the 2 nd battery unit switching buffer transition power line is connected with the 2 nd battery unit switching bypass power line in parallel, and two ends of the 2 nd battery unit switching buffer transition power line are respectively connected with the 1 st bypass connecting terminal and the 2 nd battery unit connecting terminal; the battery monitoring and switching control circuit is provided with a 1 st communication interface and is connected with a 1 st controlled switch K1, a 2 nd controlled switch K2, a 3 rd controlled switch K3, a 4 th controlled switch K4, a 5 th controlled switch K5 and a 2 nd communication interface through communication and switch control lines; thus, a battery module controller is constituted.
2. The battery module controller, the battery cluster and the energy storage system according to claim 1, wherein the battery module controller is respectively connected with a 1 st battery or a battery unit PACK and a 2 nd battery or a battery unit PACK, and the battery monitoring and switching control circuit is respectively connected with each single battery in the 1 st battery or the battery unit PACK and the 2 nd battery or the battery unit PACK through a 2 nd communication interface and a battery monitoring communication line to form a battery module for controlled switching and balanced protection;
the battery module is characterized in that the battery module with controlled switching and balanced protection is characterized in that a 1 st battery or battery cell PACK positive electrode or negative electrode is connected through a 1 st battery cell connecting terminal of a battery module controller, a 1 st battery or battery cell PACK negative electrode or positive electrode is connected through a 1 st bypass connecting terminal of the battery module controller, a 2 nd battery or battery cell PACK negative electrode or positive electrode is connected through a 2 nd battery cell connecting terminal of the battery module controller, a 2 nd battery or battery cell PACK positive electrode or negative electrode is connected through a 2 nd bypass connecting terminal of the battery module controller, and each single battery in the 1 st battery or battery cell PACK and the 2 nd battery or battery cell PACK is respectively connected through a battery monitoring communication line through a 2 nd communication interface.
3. The battery module controller, the battery cluster and the energy storage system according to claims 1-2, wherein the battery module with controlled switching and balanced protection is characterized in that a battery monitoring and switching control circuit controls a 1 st controlled switch K1 to be closed and turned on, controls a 2 nd controlled switch K2, a 3 rd controlled switch K3, a 4 th controlled switch K4 and a 5 th controlled switch K5 to be opened, and forms a serial power path of a 1 st battery or battery unit PACK and a 2 nd battery or battery unit PACK;
the battery monitoring and switching control circuit controls the 1 st controlled switch K1, the 2 nd controlled switch K2 and the 4 th controlled switch K4 to be disconnected, controls the 3 rd controlled switch K3 and the 5 th controlled switch K5 to be closed and conducted, and forms a parallel power path of the 1 st battery or battery unit PACK and the 2 nd battery or battery unit PACK, so as to form a redundant hot backup system structure of the battery unit;
the battery monitoring and switching control circuit controls the 5 th controlled switch K5 to be closed and turned on, controls the 1 st controlled switch K1, the 2 nd controlled switch K2, the 3 rd controlled switch K3 and the 4 th controlled switch K4 to be opened, and forms a 1 st battery or battery unit PACK bypass and a 2 nd battery or battery unit PACK series power path;
the battery monitoring and switching control circuit controls the 3 rd controlled switch K3 to be closed and turned on, controls the 1 st controlled switch K1, the 2 nd controlled switch K2, the 4 th controlled switch K4 and the 5 th controlled switch K5 to be opened, and forms a 2 nd battery or battery unit PACK bypass and a 1 st battery or battery unit PACK series power path.
4. A battery module controller, a battery cluster and an energy storage system according to claims 1-3, wherein, in the normal operation process of the battery module with controlled switching and balanced protection, the battery monitoring and switching control circuit sequentially controls the 4 th controlled switch K4 to be closed and conducted, the 1 st controlled switch K1 to be opened, the 5 th controlled switch K5 to be closed and conducted and the 4 th controlled switch K4 to be opened, so as to form a power path of bypass cut of balancing and protection of the 1 st battery or battery unit PACK;
in the normal operation process of serial connection of the 1 st battery or battery unit PACK and the 2 nd battery or battery unit PACK, the battery monitoring and switching control circuit sequentially controls the 2 nd controlled switch K2 to be closed and conducted, controls the 1 st controlled switch K1 to be opened, controls the 3 rd controlled switch K3 to be closed and conducted and controls the 2 nd controlled switch K2 to be opened, so that a power path cut by a bypass of equalization and protection of the 2 nd battery or battery unit PACK is formed;
in the bypass operation process of balancing and protecting the 1 st battery or battery unit PACK, the battery monitoring and switching control circuit sequentially controls the 4 th controlled switch K4 to be closed and conducted, the 5 th controlled switch K5 to be opened, the 1 st controlled switch K1 to be closed and conducted and the 4 th controlled switch K4 to be opened to form a power path input after balancing and protecting the 1 st battery or battery unit PACK;
in the battery module for controlled switching and balanced protection, in the bypass operation process of balancing and protecting the 2 nd battery or battery unit PACK, a battery monitoring and switching control circuit sequentially controls the 2 nd controlled switch K2 to be closed and conducted, controls the 3 rd controlled switch K3 to be opened, controls the 1 st controlled switch K1 to be closed and conducted and controls the 2 nd controlled switch K2 to be opened, so that a power path input after balancing and protecting the 2 nd battery or battery unit PACK is formed.
5. The battery module controller, battery cluster and energy storage system according to claims 1-4, wherein at least 1 or more battery modules are controlled to be switched and balanced and protected, and the positive poles of the battery modules of any 2 or more battery modules are connected with the negative poles of the adjacent battery modules one by one to form a battery module group cluster.
6. The battery module controller, the battery cluster and the energy storage system according to claims 1-5, wherein at least 1 or more positive poles and negative poles of the battery module cluster are connected in parallel to corresponding positive DC buses and negative DC buses respectively, the positive DC buses and the negative DC buses are connected to a power converter or a DC power device, and the energy storage system control device is connected with a 1 st communication interface arranged in a battery monitoring and switching control circuit in each battery module respectively through an energy storage system control communication line and is connected with the power converter or the DC power device to form a battery energy storage control path and a battery energy storage system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210115605.XA CN116826879A (en) | 2022-02-08 | 2022-02-08 | Battery module controller, battery cluster and energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210115605.XA CN116826879A (en) | 2022-02-08 | 2022-02-08 | Battery module controller, battery cluster and energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116826879A true CN116826879A (en) | 2023-09-29 |
Family
ID=88113179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210115605.XA Pending CN116826879A (en) | 2022-02-08 | 2022-02-08 | Battery module controller, battery cluster and energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116826879A (en) |
-
2022
- 2022-02-08 CN CN202210115605.XA patent/CN116826879A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202474990U (en) | Non-circulating-current battery pack device | |
| CN106494254B (en) | Power battery charging protection control system, method and device | |
| CN105162215B (en) | One kind is used for lead-acid batteries distributed battery management system and method in a balanced way | |
| CN214850576U (en) | BMS battery management system | |
| CN109917302B (en) | Novel storage battery pack nuclear capacity testing equipment and testing method thereof | |
| CN110768330A (en) | Charging and discharging control method and device and UPS system | |
| CN111245060A (en) | Battery pack parallel operation charging and discharging control system and method based on controllable one-way conduction circuit | |
| CN112865261B (en) | Energy storage battery, application device thereof and charge and discharge control method | |
| CN109450047A (en) | A kind of series connection energy density battery cyclic charge-discharge circuit and control method | |
| CN217427736U (en) | Energy storage system of controlled reconfiguration of voltage regulation battery unit | |
| CN207689521U (en) | The uninterrupted switching device of accumulator cell charging and discharging | |
| CN117081191A (en) | Reconfigurable battery system | |
| CN216436841U (en) | Battery energy storage system of reconfigurable battery pack | |
| CN217216029U (en) | Battery energy storage system for finely regulating and controlling battery cluster | |
| CN217427695U (en) | Digital energy storage system of reconfigurable direct current module group string | |
| CN115589060A (en) | Standby device of direct current system for station | |
| CN115940112A (en) | Method for preventing bus voltage loss by utilizing natural load nuclear capacity | |
| CN116826879A (en) | Battery module controller, battery cluster and energy storage system | |
| CN102262217B (en) | Test method and device for verifying short-circuit withstanding time of lead-acid battery | |
| CN218161832U (en) | Battery unit dynamic balancing and protection control system of energy storage system | |
| CN209803309U (en) | novel storage battery pack nuclear capacity testing device | |
| CN211296275U (en) | Energy storage system capable of automatically removing faults | |
| CN218586899U (en) | Battery module controller, battery cluster and energy storage system | |
| CN220358825U (en) | Dynamic safety protection energy storage system | |
| CN116599168A (en) | Battery unit dynamic equalization and protection control system of energy storage system |
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 |