Energy storage battery cluster testing device and system

Abstract

The utility model discloses an energy storage battery cluster testing device and system, and relates to the field of testing, and the device comprises a testing module and a battery management module. The test module comprises a transformer module, a first power module, a second power module and a liquid cooling module; the input end of the transformer module is connected with a power supply, and the output end of the transformer module is connected with the input end of the first power module to distribute power for the test module; the output end of the first power module is connected with the input end of the second power module, and alternating current is converted into direct current; the output end of the second power module is connected with the power supply end of the battery management module to supply power to the battery management module; the battery management module is connected with the energy storage battery cluster and collects state information of batteries. The power supply end of the liquid cooling module is connected with the output end of the transformer module to cool the battery management module. The test module and the battery management module are integrated, and the test module supplies power to the battery management module, so that integrated control is realized conveniently, and errors caused by inconvenient operation are reduced.

Description

Technical Field

[0001] The utility model relates to the field of testing, in particular to a testing device and system for energy storage battery clusters. Background Art

[0002] With the continuous development of electrochemical energy storage technology, the capacity and energy density of energy storage systems are constantly increasing, placing higher demands on safety and thermal management. Liquid-cooled energy storage, with its high efficiency, high power, and wide applicability, has become one of the mainstream thermal management technologies for energy storage systems. Currently, for products with increasingly larger capacities, there is still a lack of corresponding test platforms to simulate various operating conditions to fully verify product performance. Furthermore, conventional liquid-cooled energy storage test platforms have independent liquid cooling units and charging and discharging systems, preventing integrated control. This makes operation inconvenient and prone to large errors. Utility Model Content

[0003] The purpose of this application is to provide an energy storage battery cluster testing device and system, which integrates the test module with the battery management module. The test module supplies power to the battery management module, which facilitates integrated control and reduces errors caused by inconvenient operation.

[0004] To solve the above technical problems, the present application provides an energy storage battery cluster testing device, including a testing module and a battery management module;

[0005] The test module includes a transformer module, a first power module, a second power module and a liquid cooling module;

[0006] The input end of the transformer module is connected to a power supply, and the output end of the transformer module is connected to the input end of the first power module, for distributing power to the test module;

[0007] The output end of the first power module is connected to the input end of the second power module, and is used to convert alternating current into direct current;

[0008] The output end of the second power module is connected to the power supply end of the battery management module, and is used to step down the DC power to supply power to the battery management module;

[0009] The battery management module is connected to the energy storage battery cluster and is used to collect status information of the batteries in the energy storage battery cluster, wherein the status information includes battery voltage and battery temperature;

[0010] The power supply end of the liquid cooling module is connected to the output end of the transformer module for cooling the battery management module.

[0011] On the other hand, the transformer module includes a first transformer, a temperature and humidity controller and a first axial flow fan;

[0012] The input end of the first transformer is connected to the power supply, and the output end of the first transformer is connected to the input end of the first power module, for distributing power to the test module;

[0013] The temperature and humidity controller is connected to the control end of the first axial flow fan and is used to detect the temperature and humidity inside the transformer module so that the first axial flow fan dissipates heat for the transformer module based on the temperature and the humidity.

[0014] On the other hand, the first power module includes a second transformer, a first conversion module, an output inductor and an output capacitor;

[0015] The input end of the second transformer is connected to the output end of the transformer module, and the output end of the second transformer is connected to the input end of the first conversion module, for adjusting the frequency of the voltage output by the transformer module;

[0016] The output end of the first conversion module is connected to the first end of the output inductor, the second end of the output inductor is connected to the first end of the output capacitor, and the common end of the connections serves as the output end of the first power module. The second end of the output capacitor is grounded. The first conversion module is used to convert alternating current into direct current, and the output capacitor and the output inductor are used for filtering.

[0017] On the other hand, the first power module further includes a grid-connected contactor, an AC circuit breaker, a first touch screen and a second axial flow fan;

[0018] The grid-connected contactor and the AC circuit breaker are sequentially connected between the output end of the transformer module and the input end of the second transformer, and are used to connect and disconnect the circuit;

[0019] The first touch screen is used to receive human-computer interaction information sent by a user;

[0020] The second axial flow fan is used to dissipate heat for the first power module.

[0021] On the other hand, the second power module includes a third transformer, a second conversion module, a DC chopper inductor, and a bus capacitor;

[0022] The input end of the third transformer is connected to the output end of the first power module, and the output end of the third transformer is connected to the input end of the second conversion module, so as to adjust the frequency of the voltage output by the first power module;

[0023] The output end of the second conversion module is connected to the first end of the DC chopping inductor, the second ends of the DC chopping inductors are respectively connected to the first ends of the bus capacitors, and the common end of the connections serves as the output end of the second power module, and the DC chopping inductors and the bus capacitors are used for filtering.

[0024] On the other hand, the second power module further includes a magnetic ring and a third axial flow fan;

[0025] The magnetic ring is used to adjust the magnetic field in the second power module, and the third axial flow fan is used to dissipate heat for the second power module.

[0026] On the other hand, the liquid cooling module includes internal piping, a compressor, a condenser, a circulation pump, a heat exchanger and a second touch screen;

[0027] The internal pipeline is used to provide a flow path for the coolant;

[0028] The circulating pump is used to provide power for the circulation of the coolant;

[0029] The compressor, the condenser and the heat exchanger are used to adjust the temperature of the coolant in the internal pipeline;

[0030] The second touch screen is used for human-computer interaction.

[0031] On the other hand, the coolant in the internal pipeline is used to flow into the energy storage battery cluster from the bottom and flow out from the top.

[0032] On the other hand, the energy storage battery cluster includes a high-voltage box and a battery pack, wherein the high-voltage box is arranged between the battery pack and the second power module to facilitate charging or discharging of the battery pack; the battery management module includes a battery module management layer and a battery cluster management layer;

[0033] The battery module management layer is arranged in the battery pack and is connected to the voltage sensor and the temperature sensor in the battery pack; the battery cluster management layer is arranged in the high-voltage box and is connected to each of the battery module management layers.

[0034] In order to solve the above technical problems, the present application also provides an energy storage battery cluster testing system, which includes the above energy storage battery cluster testing device and an energy storage battery cluster.

[0035] The present application provides an energy storage battery cluster testing device and system, relating to the field of testing, including a test module and a battery management module. The test module includes a transformer module, a first power module, a second power module, and a liquid cooling module. The input end of the transformer module is connected to a power supply, and the output end of the transformer module is connected to the input end of the first power module for distributing power to the test module. The output end of the first power module is connected to the input end of the second power module for converting alternating current (AC) to direct current (DC). The output end of the second power module is connected to the power supply end of the battery management module for powering the battery management module. The battery management module is connected to the energy storage battery cluster for collecting battery status information, including battery voltage and battery temperature. The power supply end of the liquid cooling module is connected to the output end of the transformer module for cooling the battery management module. By integrating the test module with the battery management module, the test module supplies power to the battery management module, facilitating integrated control and reducing errors caused by inconvenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the prior art and the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A schematic structural diagram of an energy storage battery cluster testing device provided in this application;

[0038] Figure 2 A schematic diagram of the structure of a test module provided in this application;

[0039] Figure 3 A schematic structural diagram of an energy storage battery cluster provided in this application;

[0040] Figure 4 A schematic structural diagram of another energy storage battery cluster provided in this application;

[0041] Figure 5 A schematic structural diagram of a transformer module provided in this application;

[0042] Figure 6 A schematic structural diagram of a first power module provided in this application;

[0043] Figure 7 A schematic structural diagram of a second power module provided in this application;

[0044] Figure 8 A schematic structural diagram of a liquid cooling module provided in this application;

[0045] Figure 9 This is a schematic structural diagram of another liquid cooling module provided in this application. DETAILED DESCRIPTION

[0046] The core of the utility model is to provide an energy storage battery cluster testing device and system, which integrates the testing module with the battery management module to facilitate integrated control and reduce errors caused by inconvenient operation.

[0047] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] Figure 1 This is a structural diagram of an energy storage battery cluster testing device provided by the present application, which includes a testing module 11 and a battery management module;

[0049] The test module 1 includes a transformer module 11, a first power module 12, a second power module 13 and a liquid cooling module 14;

[0050] The input end of the transformer module 11 is connected to the power supply, and the output end of the transformer module 11 is connected to the input end of the first power module 12, for distributing power to the test module 1;

[0051] The output end of the first power module 12 is connected to the input end of the second power module 13, and is used to convert AC power into DC power;

[0052] The output end of the second power module 13 is connected to the power supply end of the battery management module, and is used to step down the DC power to supply power to the battery management module;

[0053] The battery management module is connected to the energy storage battery cluster and is used to collect status information of the batteries in the energy storage battery cluster, including battery voltage and battery temperature;

[0054] The power supply end of the liquid cooling module 14 is connected to the output end of the transformer module 11 for cooling the battery management module.

[0055] Figure 2 A schematic diagram of the structure of a test module provided in this application;

[0056] The test module 1 includes four parts: a transformer module 11, a first power module 12, a second power module 13, and a liquid cooling module 14; the battery management module is a BMS (Battery Management System), which collects battery voltage and temperature information through collection points arranged in the battery pack, and calculates and analyzes the battery's SOC (State of Charge) and SOH (State of Health), collects various single cell information and performs summary calculation and analysis. The calculation and analysis part is the same as the existing technology and no improvement is made in this application; the primary main circuit part of the test module 1 is connected to the battery cluster through the high-voltage box output end, and the liquid cooling part is connected to the battery cluster liquid cooling plate pipeline through the main pipeline and branch pipeline.

[0057] Figure 3 A schematic structural diagram of an energy storage battery cluster provided in this application;

[0058] Figure 4 A schematic structural diagram of another energy storage battery cluster provided in this application;

[0059] Figure 2 Among them, M4-B, M3-A, M2-B and M1-A are all batteries.

[0060] The input power is 380V AC, which powers test module 1. The transformer module, first power module 12, and second power module 13 in test module 1 sequentially process the 380V AC power, ultimately stepping it down and converting it into DC power to power the energy storage battery cluster. The energy storage battery cluster consists of multiple cells in a battery pack and a high-voltage box, which controls the charging and discharging of the cells. The battery management module collects the cell voltages during the charging and discharging process to test the battery.

[0061] The present application provides an energy storage battery cluster testing device and system, relating to the field of testing, comprising a test module 1 and a battery management module. The test module 1 includes a transformer module 11, a first power module 12, a second power module 13, and a liquid cooling module 14. The input of the transformer module 11 is connected to a power source, and the output of the transformer module 11 is connected to the input of the first power module 12, for distributing power to the test module 1. The output of the first power module 12 is connected to the input of the second power module 13, for converting alternating current (AC) to direct current (DC). The output of the second power module 13 is connected to the power supply of the battery management module, for supplying power to the battery management module. The battery management module is connected to the energy storage battery cluster for collecting battery status information, including battery voltage and temperature. The power supply of the liquid cooling module 14 is connected to the output of the transformer module 11, for cooling the battery management module. By integrating the test module 1 with the battery management module, the test module 1 supplies power to the battery management module, facilitating integrated control and reducing errors caused by inconvenient operation.

[0062] Based on the above embodiment:

[0063] Figure 5 A schematic structural diagram of a transformer module provided in this application;

[0064] In some embodiments, the transformer module 11 includes a first transformer 111 , a temperature and humidity controller 112 , and a first axial flow fan 113 ;

[0065] The input end of the first transformer 111 is connected to the power supply, and the output end of the first transformer 111 is connected to the input end of the first power module 12, for distributing power to the test module 1;

[0066] The temperature and humidity controller 112 is connected to the control end of the first axial flow fan 113 and is used to detect the temperature and humidity inside the transformer module 11 so that the first axial flow fan 113 dissipates heat for the transformer module 11 based on the temperature and humidity.

[0067] The first transformer 111 in the transformer module 11 is used to distribute power to the entire test module 1, and transmits the 380V AC power to the first power module 12 after preliminary conversion. The temperature and humidity controller 112 is used to monitor the temperature and humidity inside the transformer module 11. The axial flow fan is used to dissipate heat from the transformer. The temperature and humidity controller 112 transmits the temperature signal to the first axial flow fan to control the start and stop of the fan.

[0068] The heat exchange and ventilation mode of the transformer module 11 adopts the bottom-in and top-out mode, with air entering from the bottom and air exiting from the top, and the cable entry and exit mode is bottom entry.

[0069] Figure 6 A schematic structural diagram of a first power module provided in this application;

[0070] In some embodiments, the first power module 12 includes a second transformer 121 , a first conversion module 122 , an output inductor 123 , and an output capacitor 124 ;

[0071] The input end of the second transformer 121 is connected to the output end of the transformer module 11, and the output end of the second transformer 121 is connected to the input end of the first conversion module 122, for adjusting the frequency of the voltage output by the transformer module 11;

[0072] The output end of the first conversion module 122 is connected to the first end of the output inductor 123, the second end of the output inductor 123 is connected to the first end of the output capacitor 124, and the common end of the connections serves as the output end of the first power module 12. The second end of the output capacitor 124 is grounded. The first conversion module 122 is used to convert AC power into DC power, and the output capacitor 124 and the output inductor 123 are used for filtering.

[0073] The first power module 12 is essentially an AC / DC (Alternating Current / Direct Current) module, which is used to perform AC / DC conversion, converting AC power into DC power for testing. The output inductor 123 and the output capacitor 124 form an LC filter for stabilizing the DC voltage and outputting it.

[0074] In some embodiments, the first power module 12 further includes a grid-connected contactor 125 , an AC circuit breaker 126 , a first touch screen 127 , and a second axial fan 128 ;

[0075] The grid-connected contactor 125 and the AC circuit breaker 126 are sequentially connected between the output end of the transformer module 11 and the input end of the second transformer 121 to connect and disconnect the circuit.

[0076] The first touch screen 127 is used to receive human-computer interaction information sent by the user;

[0077] The second axial fan 128 is used to dissipate heat for the first power module 12 .

[0078] The second axial fan 128 is used for heat dissipation, the grid-connected contactor 125 and the AC circuit breaker 126 are used to connect and disconnect the main circuit to ensure equipment safety, and the first touch screen 127 is used for human-computer interaction. It can display various information of the inverter, including power generation, working mode, etc., and can be set by touch operation.

[0079] Figure 7 A schematic structural diagram of a second power module provided in this application;

[0080] In some embodiments, the second power module 13 includes a third transformer 131 , a second conversion module 132 , a DC chopper inductor 133 , and a bus capacitor 134 ;

[0081] The input end of the third transformer 131 is connected to the output end of the first power module 12, and the output end of the third transformer 131 is connected to the input end of the second conversion module 132, for frequency adjustment of the voltage output by the first power module 12;

[0082] The output end of the second conversion module 132 is connected to the first end of the DC chopping inductor 133, and the second end of the DC chopping inductor 133 is respectively connected to the first end of the bus capacitor 134, and the common end of the connections serves as the output end of the second power module 13. The DC chopping inductor 133 and the bus capacitor 134 are used for filtering.

[0083] The first power module 12 is essentially a DC / DC (Direct Current / Direct Current) module, which is used to convert a fixed DC voltage into a variable DC voltage. It is equipped with a DC chopper inductor 133 and a bus capacitor 134 to smooth the bus voltage.

[0084] In some embodiments, the second power module 13 further includes a magnetic ring 135 and a third axial fan 136;

[0085] The magnetic ring 135 is used to adjust the magnetic field in the second power module 13 , and the third axial flow fan 136 is used to dissipate heat for the second power module 13 .

[0086] The magnetic ring 135 is used to adjust and control the magnetic field, and the third axial flow fan 136 is used to dissipate heat for the second power module 13 .

[0087] Figure 8 A schematic structural diagram of a liquid cooling module provided in this application;

[0088] In some embodiments, the liquid cooling module 14 includes an internal pipe 141 , a compressor 142 , a condenser 143 , a circulation pump 144 , a heat exchanger 145 , and a second touch screen;

[0089] The internal pipe 141 is used to provide a flow path for the coolant;

[0090] The circulating pump 144 is used to provide power for the circulation of the coolant;

[0091] The compressor 142 , the condenser 143 and the heat exchanger 145 are used to adjust the temperature of the coolant in the internal pipe 141 ;

[0092] The second touch screen is used for human-computer interaction.

[0093] The circulating pump 144 provided at the bottom can drive the flow of the coolant. The temperature of the coolant is determined by the compressor 142, the condenser 143 and the heat exchanger 145. The temperature of the coolant can be adjusted to reach the target temperature. A second touch screen can also be provided to receive commands sent by the user.

[0094] Figure 9 A schematic structural diagram of another liquid cooling module 14 provided in this application;

[0095] In some embodiments, the coolant in the internal pipe 141 is configured to flow into the energy storage battery cluster from the bottom and out from the top.

[0096] The liquid cooling module 14 has a cooling capacity of 30kW and a heating capacity of 9kW. It can be operated and set through the touch screen, and the refrigerant used is 50% ethylene glycol aqueous solution.

[0097] The coolant is input from the coolant inlet at the bottom, passes through the primary main line, the secondary main line and the branch line in sequence to reach the heat dissipation position, and then passes through the branch line, the secondary main line and the primary main line from the heat dissipation position to reach the coolant outlet at the top.

[0098] In some embodiments, the energy storage battery cluster includes a high-voltage box and a battery pack. The high-voltage box is disposed between the battery pack and the second power module 13 to facilitate charging or discharging of the battery pack. The battery management module includes a battery module management layer 21 and a battery cluster management layer 22.

[0099] The battery module management layer 21 is provided in the battery pack and is connected to the voltage sensor and the temperature sensor in the battery pack; the battery cluster management layer 22 is provided in the high-voltage box and is connected to each battery module management layer 21 .

[0100] The battery module management layer (BMU) is located within each battery pack and connects to sensors via a data acquisition harness to obtain battery information within the pack. The sensor layout within the battery pack mirrors the cell layout within the pack, with monitoring points located at the cell terminals. The battery cluster management layer (BCMU) is located within the high-voltage box and aggregates real-time battery data provided by the BMU via the CAN interface. After processing, it manages and controls the charging and discharging of the battery cluster.

[0101] The present application also provides an energy storage battery cluster testing system, comprising the above-mentioned energy storage battery cluster testing device and an energy storage battery cluster.

[0102] For an introduction to the energy storage battery cluster testing system provided in this application, please refer to the above embodiments and will not be described in detail here.

[0103] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, article, or apparatus comprising the element.

[0104] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0105] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A storage battery cluster testing device, characterized in that: Including test module and battery management module; The test module includes a transformer module, a first power module, a second power module and a liquid cooling module; The input end of the transformer module is connected to the power supply, and the output end of the transformer module is connected to the input end of the first power module for voltage reduction; The output end of the first power module is connected to the input end of the second power module, and is used to convert alternating current into direct current; The output end of the second power module is connected to the power supply end of the battery management module, and is used to step down the DC power to supply power to the battery management module; The battery management module is connected to the energy storage battery cluster and is used to collect status information of the batteries in the energy storage battery cluster, wherein the status information includes battery voltage and battery temperature; The power supply end of the liquid cooling module is connected to the output end of the transformer module for cooling the battery management module.

2. The energy storage battery cluster testing device according to claim 1, characterized in that: The transformer module includes a first transformer, a temperature and humidity controller and a first axial flow fan; The input end of the first transformer is connected to the power supply, and the output end of the first transformer is connected to the input end of the first power module, for distributing power to the test module; The temperature and humidity controller is connected to the control end of the first axial flow fan and is used to detect the temperature and humidity inside the transformer module so that the first axial flow fan dissipates heat for the transformer module based on the temperature and the humidity.

3. The energy storage battery cluster testing device according to claim 1, wherein: The first power module includes a second transformer, a first conversion module, an output inductor and an output capacitor; The input end of the second transformer is connected to the output end of the transformer module, and the output end of the second transformer is connected to the input end of the first conversion module, for adjusting the frequency of the voltage output by the transformer module; The output end of the first conversion module is connected to the first end of the output inductor, the second end of the output inductor is connected to the first end of the output capacitor, and the common end of the connections serves as the output end of the first power module. The second end of the output capacitor is grounded. The first conversion module is used to convert alternating current into direct current, and the output capacitor and the output inductor are used for filtering.

4. The energy storage battery cluster testing device according to claim 3, characterized in that: The first power module further includes a grid-connected contactor, an AC circuit breaker, a first touch screen and a second axial flow fan; The grid-connected contactor and the AC circuit breaker are sequentially connected between the output end of the transformer module and the input end of the second transformer, and are used to connect and disconnect the circuit; The first touch screen is used to receive human-computer interaction information sent by a user; The second axial flow fan is used to dissipate heat for the first power module.

5. The energy storage battery cluster testing device according to claim 1, wherein: The second power module includes a third transformer, a second conversion module, a DC chopper inductor, and a bus capacitor; The input end of the third transformer is connected to the output end of the first power module, and the output end of the third transformer is connected to the input end of the second conversion module, so as to adjust the frequency of the voltage output by the first power module; The output end of the second conversion module is connected to the first end of the DC chopping inductor, the second ends of the DC chopping inductors are respectively connected to the first ends of the bus capacitors, and the common end of the connections serves as the output end of the second power module, and the DC chopping inductors and the bus capacitors are used for filtering.

6. The energy storage battery cluster testing device according to claim 5, characterized in that: The second power module further includes a magnetic ring and a third axial flow fan; The magnetic ring is used to adjust the magnetic field in the second power module, and the third axial flow fan is used to dissipate heat for the second power module.

7. The energy storage battery cluster testing device according to claim 1, wherein: The liquid cooling module includes internal pipes, a compressor, a condenser, a circulation pump, a heat exchanger and a second touch screen; The internal pipeline is used to provide a flow path for the coolant; The circulating pump is used to provide power for the circulation of the coolant; The compressor, the condenser and the heat exchanger are used to adjust the temperature of the coolant in the internal pipeline; The second touch screen is used for human-computer interaction.

8. The energy storage battery cluster testing device according to claim 7, characterized in that: The coolant in the internal pipeline is used to flow in from the lower part of the energy storage battery cluster and flow out from the upper part.

9. The energy storage battery cluster testing device according to any one of claims 1 to 8, characterized in that: The energy storage battery cluster includes a high-voltage box and a battery pack, wherein the high-voltage box is arranged between the battery pack and the second power module to facilitate charging or discharging of the battery pack; the battery management module includes a battery module management layer and a battery cluster management layer; The battery module management layer is arranged in the battery pack and is connected to the voltage sensor and the temperature sensor in the battery pack; the battery cluster management layer is arranged in the high-voltage box and is connected to each of the battery module management layers.

10. An energy storage battery cluster testing system, characterized in that: The energy storage battery cluster testing device comprises the energy storage battery cluster as claimed in any one of claims 1 to 9, and further comprises an energy storage battery cluster.

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