CN215835162U - Battery plug-in box and energy storage system are optimized to electricity core level - Google Patents
Battery plug-in box and energy storage system are optimized to electricity core level Download PDFInfo
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Abstract
The utility model provides a battery cell-level optimized battery plug box and an energy storage system, and belongs to the field of electrochemical energy storage. The battery grade is optimized the battery subrack and is included: a plurality of electric core assemblies connected in parallel on the direct current bus; each electric core assembly comprises a bypass switch, a through switch, at least one single electric core, a main control unit and a DC/DC converter; the single battery cell is connected with a DC/DC converter, and the DC/DC converter is connected with a main control unit; the disconnection and the direct connection between the single battery cell and the direct current bus are realized through the bypass switch and the through switch or the connection through the DC/DC converter. The utility model can completely avoid the short plate effect of the energy storage system caused by the series-parallel connection of the battery cells, so that the cycle life of the energy storage system is consistent with that of the battery cells.
Description
Technical Field
The utility model belongs to the field of electrochemical energy storage, and particularly relates to a battery cell-level optimized battery plug box and an energy storage system.
Background
At present, the capacity demand of a large-scale energy storage system on an energy storage galvanic pile is increasingly large, and a large number of battery plug boxes in the galvanic pile are connected in series and in parallel to form a main means for expanding the capacity of the energy storage system. In practical projects, 1-10 batteries are generally connected in parallel to form a battery module, and then 12-24 battery modules are connected in series to form a battery plug box, wherein the battery plug box is the minimum operation unit during maintenance of a stack. Generally, a plurality of battery plug boxes are connected in series to form a battery cluster, and the voltage of the battery cluster is generally matched with the direct-current voltage range of the energy storage converter. And the direct current side of each energy storage converter is connected with a plurality of parallel battery clusters to form a galvanic pile. Fig. 1 shows a composition manner of a stack and an energy storage converter in a common energy storage system.
However, the inconsistency of each battery after series-parallel connection becomes a limiting factor of the overall performance of the electric pile. After a single battery in the electric pile reaches the cut-off voltage of charging and discharging, the whole electric pile has to stop charging and discharging, otherwise, battery failure is caused, and even accidents such as fire disasters are caused. Fig. 8 is a graph showing charge and discharge curves of a single battery cell, and it is obvious that the voltage change of the battery cell at the charge and discharge end is severe, the voltage difference of the battery cell in the whole pile is increased due to the inconsistency of the battery cell, some battery cells reach the overvoltage and undervoltage protection point, and some battery cells still have a certain available capacity.
Further, although the energy storage converter is provided with a low-current charging mode such as constant-voltage charging and floating charging, often in the later stage of a high-power constant-current charging stage, an overvoltage alarm of a single cell in the cell stack occurs, so that the whole cell stack cannot enter a constant-voltage and floating charging state, namely, the cell stack is shut down. According to engineering experience, this mode of operation will lose at least 4% of the stack charge-discharge capacity. As the stack operating time lengthens, the consistency becomes worse and the loss of charge-discharge capacity is further increased.
The current solution is to use a battery management system, which not only monitors the operating conditions of each battery, such as voltage, temperature, etc., but also adopts active equalization or passive equalization, etc., so that in a single battery box, the battery with higher voltage is less charged during charging and the battery with lower voltage is less discharged during discharging. But the equalization capability is limited, and only the equalization among the batteries in a single battery plug box can be managed, and the short plate effect of the electric pile is often generated in practical projects. Fig. 2 shows a conventional battery management system in a single battery box, including a collection and equalization circuit.
On the basis of using a battery management system, manufacturers propose to adopt a group-string type energy storage converter, namely, each battery cluster is connected with one energy storage converter, and the battery clusters are not connected in parallel. The function that the short-plate battery or the battery cluster in which the plug box is arranged can be withdrawn at any time and other battery clusters continue to charge and discharge can be realized. However, when a single battery or a battery plug box reaches the charge-discharge cut-off voltage, the whole cluster stops running, and the capacity utilization of other batteries is still limited. Fig. 3 shows a system configuration of a conventional group-series energy storage converter and a stack.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the prior art, and provides a cell-level optimized battery plug box and an energy storage system, so as to avoid a short plate effect caused by that a certain battery or a battery plug box in a stack reaches a cut-off voltage or fails.
The utility model is realized by the following technical scheme:
in a first aspect of the present invention, there is provided a cell-level optimized battery box, comprising: a plurality of electric core assemblies connected in parallel on the direct current bus;
each electric core assembly comprises a bypass switch, a through switch, at least one single electric core, a main control unit and a DC/DC converter;
the single battery cell is connected with a DC/DC converter, and the DC/DC converter is connected with a main control unit;
the disconnection and the direct connection between the single battery cell and the direct current bus are realized through the bypass switch and the through switch or the connection through the DC/DC converter.
In a further improvement of the utility model, each of the cell assemblies comprises a single cell;
the positive and negative electrodes of the single battery cell are respectively connected with the positive and negative electrodes at the head end of the DC/DC converter, and the positive and negative electrodes at the tail end of the DC/DC converter are respectively connected with the positive and negative electrodes of the direct current bus;
the positive and negative levels of the head end of the bypass switch are respectively connected with the positive and negative levels of the head end of the DC/DC converter, and the positive and negative levels of the tail end of the bypass switch are respectively connected with the positive and negative levels of the tail end of the DC/DC converter;
and a direct switch is connected in parallel on a line connected with the direct current bus at the tail end of the DC/DC converter.
The utility model is further improved in that each cell assembly comprises a plurality of single cells which are sequentially connected in series;
the positive electrode and the negative electrode of the last monomer battery cell are respectively connected with the positive electrode and the negative electrode at the head end of the DC/DC converter, and the positive electrode and the negative electrode at the tail end of the DC/DC converter are respectively connected with the positive electrode and the negative electrode of the direct current bus;
the positive and negative levels of the head end of the bypass switch are respectively connected with the positive and negative levels of the head end of the DC/DC converter, and the positive and negative levels of the tail end of the bypass switch are respectively connected with the positive and negative levels of the tail end of the DC/DC converter;
and a direct switch is connected in parallel on a line connected with the direct current bus at the tail end of the DC/DC converter.
The utility model is further improved in that each electric core assembly further comprises a high-speed communication interface, and the high-speed communication interface is connected with the main control unit.
Furthermore, each electric core component also comprises an acquisition circuit, and the acquisition circuit is connected with the main control unit.
In a second aspect of the present invention, there is provided an energy storage system comprising: the system comprises a plurality of battery clusters, a plurality of energy storage converters, a plurality of cluster management systems and a centralized control device;
the battery clusters, the energy storage converter and the cluster management system are in one-to-one correspondence;
each battery cluster comprises a plurality of the cell-level optimized battery plug boxes, and direct-current buses of the cell-level optimized battery plug boxes are sequentially connected in series and then connected to the direct-current side of the energy storage converter;
and the main control unit of each electric core assembly in the same battery cluster is communicated with a cluster management system corresponding to the battery cluster through a high-speed communication interface.
Further, the energy storage system further comprises a plurality of box battery management systems;
the subrack battery management system corresponds to the battery clusters one by one and communicates with each main control unit in the battery cluster corresponding to the subrack battery management system.
The utility model has the further improvement that all the energy storage converters are respectively connected with the centralized control device;
all the cluster management systems are respectively connected with the centralized control device;
and all the plug-in box battery management systems are respectively connected with the centralized control device.
Compared with the prior art, the utility model has the beneficial effects that: the utility model can completely avoid the short plate effect of the energy storage system caused by the series-parallel connection of the battery cells, so that the cycle life of the energy storage system is consistent with that of the battery cells.
Drawings
Fig. 1 is a primary topology diagram of a conventional dc-side system.
Fig. 2 is a diagram of a conventional battery management system balancing topology.
Fig. 3 is a primary topology diagram of a series-connected dc-side system.
Fig. 4 is a primary topology diagram of the system of the present invention.
Fig. 5 is a communication topology diagram of the system of the present invention.
Fig. 6 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 7 is a structural diagram of the second embodiment of the present invention.
Fig. 8 is a curve of the battery cell during charging and discharging.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings:
the utility model provides a cell-level optimized battery plug-in box, which comprises a plurality of cell assemblies connected in parallel on a direct current bus; each electric core assembly comprises a bypass switch, a through switch, at least one single electric core, a main control unit and a DC/DC converter; the single battery cell is connected with a DC/DC converter, and the DC/DC converter is connected with a main control unit; the disconnection and the direct connection between the single battery cell and the direct current bus are realized through the bypass switch and the through switch or the connection through the DC/DC converter.
The embodiment of the battery cell-level optimized battery plug-in box of the utility model is as follows:
[ EXAMPLES one ]
Fig. 6 shows an embodiment of the cell-level optimized battery box of the present invention, which includes a plurality of cell assemblies, each cell assembly includes a single cell, a main control unit, and a high-speed communication interface, a DC/DC converter is connected to each single cell, and the DC/DC converter and the high-speed communication interface are respectively connected to the main control unit. The main control unit is used for receiving an instruction issued by the cluster management system and uploading the state data of the battery cell to the cluster management system. Furthermore, a collecting circuit is connected to the main control unit, and the main control unit collects the state data of the battery cell through the collecting circuit. The functions of the acquisition circuit and the plug box battery management system are the same, the plug box battery management system can be used as a redundant configuration, the plug box battery management system can be removed, and only the acquisition circuit is adopted.
Specifically, as shown in fig. 6, the positive electrode and the negative electrode of the single battery cell are connected to the positive electrode and the negative electrode of the head end of the DC/DC converter, and the positive electrode and the negative electrode of the tail end of the DC/DC converter are respectively connected to the positive electrode and the negative electrode of the direct current bus. Furthermore, each DC/DC converter is connected with a bypass switch, the positive and negative levels of the head end of the bypass switch are respectively connected with the positive and negative levels of the head end of the DC/DC converter, and the positive and negative levels of the tail end of the bypass switch are respectively connected with the positive and negative levels of the tail end of the DC/DC converter. When the bypass switch is closed, the battery cell is directly connected with the direct-current bus, and when the bypass switch is disconnected, the battery cell is connected with the direct-current bus through the DC/DC converter. Furthermore, a direct-current switch is connected in parallel on a circuit connected with the direct-current bus at the tail end of the DC/DC converter, when the direct-current switch is closed, the positive electrode and the negative electrode of the direct-current bus at the electric core assembly are directly communicated, the function of cutting off the single electric core in the electric core assembly is realized, and the operation of other electric core assemblies cannot be influenced after the single electric core is cut off.
In this way, the DC/DC converters in multiple cell assemblies within one cell-level optimized battery plug box are connected in parallel on the DC bus. For each cluster of batteries, the direct-current buses of the battery cell level optimization battery plug boxes are connected in series in sequence and then connected to the direct-current side of the energy storage converter.
[ example two ]
Fig. 7 shows another embodiment of the cell-level optimized battery box of the present invention, which includes a plurality of cell assemblies, each cell assembly includes a plurality of single cells connected in series in sequence, a main control unit, and a high-speed communication interface, in each cell assembly, a DC/DC converter is connected to the last single cell, and the DC/DC converter and the high-speed communication interface are respectively connected to the main control unit. Furthermore, a collecting circuit is connected to the main control unit, and the main control unit collects the state data of the single battery cell through the collecting circuit. The functions of the acquisition circuit and the plug box battery management system are the same, the plug box battery management system can be used as a redundant configuration, the plug box battery management system can be removed, and only the acquisition circuit is adopted.
Specifically, as shown in fig. 7, the positive electrode and the negative electrode of the last individual electric core in each electric core assembly are connected with the positive electrode and the negative electrode of the head end of the DC/DC converter, and the positive electrode and the negative electrode of the tail end of the DC/DC converter are respectively connected with the positive electrode and the negative electrode of the direct current bus. Furthermore, each DC/DC converter is connected with a bypass switch, the positive and negative levels of the head end of the bypass switch are respectively connected with the positive and negative levels of the head end of the DC/DC converter, and the positive and negative levels of the tail end of the bypass switch are respectively connected with the positive and negative levels of the tail end of the DC/DC converter. When the bypass switch is closed, the battery cell is directly connected with the direct-current bus, and when the bypass switch is disconnected, the battery cell is connected with the direct-current bus through the DC/DC converter. Furthermore, a direct-current switch is connected in parallel on a circuit connected with the direct-current bus at the tail end of the DC/DC converter, when the direct-current switch is closed, the positive electrode and the negative electrode of the direct-current bus at the electric core assembly are directly communicated, the function of cutting off all the serially connected single electric cores in the electric core assembly is realized, and the operation of other electric core assemblies cannot be influenced after all the single electric cores in the electric core assembly are cut off.
In this way, the DC/DC converters in multiple cell assemblies within one cell-level optimized battery plug box are connected in parallel on the DC bus. For each cluster of batteries, the direct-current buses of the battery cell level optimization battery plug boxes are connected in series in sequence and then connected to the direct-current side of the energy storage converter.
The energy storage system of the utility model is composed of a combiner cabinet (the combiner cabinet is a combiner on an alternating current side, is a multi-inlet single outlet and is an existing product, and is not described herein again), an energy storage converter and a cell-level optimized battery plug box, wherein a plurality of cell-level optimized battery plug boxes are connected in series in sequence and then connected with one energy storage converter, and a plurality of energy storage converters are connected with the combiner cabinet respectively.
The embodiment of the energy storage system of the utility model is as follows:
[ EXAMPLE III ]
The structure of the energy storage system of the utility model is shown in fig. 5, and comprises a centralized control device, a plurality of energy storage converters, a plurality of cluster management systems and a plurality of battery clusters. Further, the energy storage system may further include a plurality of box battery management systems. The battery clusters, the subrack battery management systems, the energy storage converters and the cluster management systems are in one-to-one correspondence, namely, each battery cluster is provided with one subrack battery management system, one energy storage converter and one cluster management system. Each battery cluster comprises a plurality of cell-level optimized battery plug boxes, and the plurality of cell-level optimized battery plug boxes are connected in series and then are connected with the energy storage converter. The subrack battery management systems of all the battery clusters are respectively connected with the centralized control device, the energy storage converters of all the battery clusters are respectively connected with the centralized control device, and the cluster management systems of all the battery clusters are respectively connected with the centralized control device. The master control unit in each electric core assembly in the same battery cluster is communicated with the cluster management system of the cluster through a high-speed communication interface, meanwhile, each plug-in box battery management system is communicated with the master control unit of each electric core assembly in the corresponding battery cluster, and the acquired data are sent to the master control unit.
The cluster management system is used for managing a main control unit in the cell-level optimized battery plug box, controlling switching between the DC/DC converter and the bypass and uploading data to the centralized control system. The cluster management system may adopt an existing PLC, a communication manager, and the like, which is not described herein again.
The plug-in box battery management system is an existing product and can acquire data of voltage, temperature and current of a battery core. If the structure shown in fig. 6 is adopted, the subrack battery management system collects data of all the single battery cells and uploads the data to the main control unit, and the main control unit uploads the data to the cluster management system. If the structure of fig. 7 is adopted, the subrack battery management system collects data, current, voltage and temperature of each single battery cell, and uploads the total voltage, average temperature and current of a plurality of battery cells connected in series to the main control unit, and the main control unit uploads the data to the cluster management system.
The centralized control device is a master control unit in the whole electric pile and is responsible for controlling the charge and discharge power of the energy storage converter, the coordination of the chargeable and dischargeable power of each cluster and the switching between the PQ and VF sources of the energy storage converter. The centralized control device coordinates power coordination control of each energy storage converter and the cluster management system and can output the overall state of the whole energy storage system outwards. These control methods and coordination methods are mature technologies and are not described herein again.
Specifically, in the structure shown in fig. 6, the main control unit in each cell assembly collects the current, voltage and temperature of the individual cells in the cell assembly, and in the structure shown in fig. 7, the main control unit in each cell assembly collects the total voltage, average temperature and average current of the N cells connected in series in the cell assembly (i.e., the total voltage is obtained by adding the voltages of all the N individual cells connected in series in the cell assembly, and the average value is obtained for the temperature and current of each individual cell), and then uploads all the data to the cluster management system. The cluster management system judges according to data uploaded by each main control unit in each cell-level optimized battery plug box, then respectively sends instructions to each main control unit, and enables the cell assemblies to operate in a through state, a bypass state or a voltage reduction state by controlling the opening or closing of bypass switches and through switches in the cell assemblies. In this way, the cluster management system enables individual control of the bypass switch, the pass-through switch, of each electrical core assembly. Meanwhile, the cluster management system uploads data such as states of the cell-level optimized battery plug box, battery voltage and the like, chargeable and dischargeable power of the running state of the equipment and the like to the centralized control device.
The utility model also provides a method for applying the energy storage system, which comprises the following steps: the cluster management system judges according to data uploaded by each main control unit in each cell-level optimized battery plug box, then respectively sends instructions to each main control unit, and enables the cell assemblies to operate in a through state, a bypass state or a voltage reduction state by controlling the opening or closing of bypass switches and through switches in the cell assemblies.
An example of the method is as follows:
[ EXAMPLE IV ]
The method specifically comprises the following steps:
when the monomer electric core in the electric core subassembly is in charge-discharge platform period (whether the data that the management system of clustering uploaded according to the main control unit judges to be in charge-discharge platform period, concrete judgement method adopt current method can, no longer give details here), it is better to explain the uniformity of whole cluster battery, does not need the adjustment, then the management system of clustering issues the instruction and gives the main control unit of electric core subassembly, and this instruction is: the bypass switch is closed, the through switch is disconnected, the DC/DC converter does not participate in operation after the bypass switch is closed and the through switch is disconnected, and the cell assembly operates in a through state, namely, a single cell is directly connected into the battery cluster without the current transformation of the DC/DC converter (namely, the single cell is directly connected with the direct current bus), so that the system loss can be reduced;
when the monomer electric core in the electric core subassembly is in charge-discharge terminal stage (whether the data that the management system of clustering uploaded according to the master control unit judge is in charge-discharge terminal stage, concrete judgement method adopt current method can, no longer give consideration to here), voltage can sharp change this moment, is close to the over/under-voltage alarm value, then the management system of clustering issues the master control unit of order for the electric core subassembly, and this instruction is: the bypass switch and the through switch are disconnected, after the bypass switch and the through switch are disconnected, the DC/DC converter is put into operation (namely, the single battery cell is connected with the direct-current bus through the DC/DC converter), the battery cell assembly operates in a voltage reduction state, and the charging and discharging power of the battery cell assembly is reduced by reducing the voltage of the DC/DC converter, so that the battery in the battery plug box can achieve the effects of constant voltage, floating charge and the like, and further, the phenomenon that the large current is directly charged to overvoltage alarm shutdown is avoided;
when the single electric core of electric core subassembly breaks down (whether the data that management system of clustering uploaded according to the main control unit judges to break down, concrete judgement method adopt current method can, no longer give details here), then management system of clustering issues the instruction and gives the main control unit, and this instruction is: closed through switch (bypass switch keeps unchanged, and is closed or break off all can), through switch closed back electric core subassembly is in the bypass state, and the monomer electric core in this electric core subassembly breaks away from with direct current bus-bar promptly, has also directly just broken away from monomer electric core and battery cluster, has guaranteed that other battery subrack still can normally charge and discharge in the battery cluster simultaneously.
The centralized control device is communicated with all cluster management systems in the electric pile to collect the information of all batteries. The cluster management system judges whether the respective operation states of the battery cells need to be reduced or not, and even bypasses the battery cells. When more battery plug boxes in the cluster operate in a voltage reduction state, the centralized control device coordinates the energy storage converter to reduce the whole charging current or power. When a large number of battery plug boxes are separated from the cluster (for example, the number of the separated battery plug boxes reaches a preset threshold value), the operating direct-current voltage value required by the energy storage converter may not be reached, and at this time, the centralized control device controls the energy storage converter to stop charging and discharging.
In the utility model, each single battery cell is provided with one DC/DC converter. In a battery plug-in box, each battery core is connected in parallel through a DC/DC converter. For each cluster of batteries, a plurality of battery plug boxes are connected in series and then connected to the direct current side of the energy storage converter. In addition, the utility model sets a cluster management system for each cluster, and is used for carrying out centralized cooperative control on the cell level optimized battery plug box, the battery management system and the energy storage converter in the cluster. In addition, each battery core assembly is provided with one main control unit, and the charge and discharge of the single battery cores in the battery core assembly can be controlled through the main control unit, so that the short plate effect caused by series connection in the traditional system is completely eliminated.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Finally, it should be noted that the above-mentioned technical solution is only one embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be easily made based on the application method and principle of the present invention disclosed, and the method is not limited to the above-mentioned specific embodiment of the present invention, so that the above-mentioned embodiment is only preferred, and not restrictive.
Claims (8)
1. The utility model provides a battery subrack is optimized to electricity core level which characterized in that: the battery grade is optimized the battery subrack and is included: a plurality of electric core assemblies connected in parallel on the direct current bus;
each electric core assembly comprises a bypass switch, a through switch, at least one single electric core, a main control unit and a DC/DC converter;
the single battery cell is connected with a DC/DC converter, and the DC/DC converter is connected with a main control unit;
the disconnection and the direct connection between the single battery cell and the direct current bus are realized through the bypass switch and the through switch or the connection through the DC/DC converter.
2. The cell-level optimized battery subrack of claim 1, wherein: each battery cell assembly comprises a single battery cell;
the positive and negative electrodes of the single battery cell are respectively connected with the positive and negative electrodes at the head end of the DC/DC converter, and the positive and negative electrodes at the tail end of the DC/DC converter are respectively connected with the positive and negative electrodes of the direct current bus;
the positive and negative levels of the head end of the bypass switch are respectively connected with the positive and negative levels of the head end of the DC/DC converter, and the positive and negative levels of the tail end of the bypass switch are respectively connected with the positive and negative levels of the tail end of the DC/DC converter;
and a direct switch is connected in parallel on a line connected with the direct current bus at the tail end of the DC/DC converter.
3. The cell-level optimized battery subrack of claim 1, wherein: each battery cell assembly comprises a plurality of single battery cells which are sequentially connected in series;
the positive electrode and the negative electrode of the last monomer battery cell are respectively connected with the positive electrode and the negative electrode at the head end of the DC/DC converter, and the positive electrode and the negative electrode at the tail end of the DC/DC converter are respectively connected with the positive electrode and the negative electrode of the direct current bus;
the positive and negative levels of the head end of the bypass switch are respectively connected with the positive and negative levels of the head end of the DC/DC converter, and the positive and negative levels of the tail end of the bypass switch are respectively connected with the positive and negative levels of the tail end of the DC/DC converter;
and a direct switch is connected in parallel on a line connected with the direct current bus at the tail end of the DC/DC converter.
4. The cell-level optimized battery subrack of claim 2 or 3, wherein: each electric core component also comprises a high-speed communication interface, and the high-speed communication interface is connected with the main control unit.
5. The cell-level optimized battery subrack of claim 2 or 3, wherein: every electricity core subassembly still includes acquisition circuit, acquisition circuit is connected with the main control unit.
6. An energy storage system, characterized by: the energy storage system includes: the system comprises a plurality of battery clusters, a plurality of energy storage converters, a plurality of cluster management systems and a centralized control device;
the battery clusters, the energy storage converter and the cluster management system are in one-to-one correspondence;
each battery cluster comprises a plurality of cell-level optimized battery plug-in boxes according to any one of claims 1 to 5, and direct-current buses of the plurality of cell-level optimized battery plug-in boxes are sequentially connected in series and then connected to the direct-current side of the energy storage converter;
and the main control unit of each electric core assembly in the same battery cluster is communicated with a cluster management system corresponding to the battery cluster through a high-speed communication interface.
7. The energy storage system of claim 6, wherein: the energy storage system further comprises a plurality of subrack battery management systems;
the subrack battery management system corresponds to the battery clusters one by one and communicates with each main control unit in the battery cluster corresponding to the subrack battery management system.
8. The energy storage system of claim 7, wherein: all the energy storage converters are respectively connected with the centralized control device;
all the cluster management systems are respectively connected with the centralized control device;
and all the plug-in box battery management systems are respectively connected with the centralized control device.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113629800A (en) * | 2021-07-14 | 2021-11-09 | 北京合汇创赢新能源合伙企业(有限合伙) | Battery cell level optimized battery plug box, energy storage system and application of battery cell level optimized battery plug box |
| CN117318228A (en) * | 2023-09-25 | 2023-12-29 | 江苏天合储能有限公司 | Battery core protection device, energy storage system and battery core protection method |
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2021
- 2021-07-14 CN CN202121608785.2U patent/CN215835162U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113629800A (en) * | 2021-07-14 | 2021-11-09 | 北京合汇创赢新能源合伙企业(有限合伙) | Battery cell level optimized battery plug box, energy storage system and application of battery cell level optimized battery plug box |
| CN113629800B (en) * | 2021-07-14 | 2025-08-15 | 北京合汇创赢新能源合伙企业(有限合伙) | Battery cell level optimized battery plug box, energy storage system and application thereof |
| CN117318228A (en) * | 2023-09-25 | 2023-12-29 | 江苏天合储能有限公司 | Battery core protection device, energy storage system and battery core protection method |
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