Energy storage system

Abstract

The utility model provides an energy storage system. The energy storage system comprises a battery device, a first bin body, a second bin body, a control module, a heat management module and a converter device. Battery devices are contained in the first bin body and the second bin body, the first bin body is located above the second bin body, and at least one of the size of the first bin body and the size of the second bin body in the height direction is smaller than the size of a standard container in the height direction. The first bin body and the second bin body contain the control module, the heat management module and the converter device. And the converter device is electrically connected with the battery device. The battery device comprises a battery monomer, the battery monomer comprises a shell and an electrode terminal, the width and height of the shell are both smaller than the length of the shell, a plurality of battery monomers are arranged along the width direction of the shell to form a battery monomer assembly, and the electrode terminal is arranged at at least one end of the shell along the length direction of the shell. The energy storage system has a high space utilization rate, and the volume energy density of the energy storage system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to an energy storage system. Background Art

[0002] With the rapid development of technology, electric energy has become an indispensable energy source in people's production and life. In order to improve the smoothness of electric energy supply and ensure the normal operation of production and life, an energy storage system is required. The energy storage system can realize the cyclic storage and release of electric energy. By charging or discharging the battery device of the energy storage system, electric energy can be stored in the energy storage system or the electric energy stored in the energy storage system can be supplied to the electrical device. The energy storage system is widely used in industrial power supply, household power supply, temporary power supply, mobile power supply, wind power generation, solar power generation, energy storage power stations and other fields.

[0003] In the development of energy storage systems, in addition to improving the performance of energy storage systems, how to improve the volumetric energy density of energy storage systems is also an issue that cannot be ignored. Therefore, how to improve the volumetric energy density of energy storage systems is a technical problem that needs continuous improvement in energy storage technology. Summary of the Utility Model

[0004] An embodiment of the present application provides an energy storage system that can improve the volumetric energy density of the energy storage system.

[0005] In a first aspect, an embodiment of the present application provides an energy storage system, including a first bin, a second bin, a control module, a thermal management module, a current conversion device, and a plurality of battery devices; a plurality of battery devices are accommodated in both the first bin and the second bin, the first bin and the second bin are stacked along the height direction, the first bin is located above the second bin, and at least one of the dimension of the first bin along the height direction and the dimension of the second bin along the height direction is less than the dimension of a standard container along the height direction; the control module is used for electrically controlling the plurality of battery devices in the first bin and the second bin; the control module is accommodated in one of the first bin and the second bin, or a part of the control module is accommodated in the first bin and another part is accommodated in the second bin; the thermal management module is used for managing the temperature of the plurality of battery devices in the first bin and the second bin; the thermal management module is accommodated in one of the first bin and the second bin, or a part of the thermal management module is accommodated in the first bin and another part is accommodated in the second bin; the current conversion device is electrically connected to the plurality of battery devices, and at least one of the first bin and the second bin accommodates the current conversion device; wherein, each battery device includes a plurality of battery cells, each battery cell includes a housing and electrode terminals, the width and height of the housing are both less than the length of the housing, the plurality of battery cells are arranged along the width direction of the housing to form a battery cell assembly, and along the length direction of the housing, the electrode terminals are arranged at at least one end of the housing.

[0006] In the above technical solution, the battery device, the control module, the thermal management module, and the power conversion device are all accommodated in the first housing and the second housing. On the one hand, it can reduce the space waste of the energy storage system. On the other hand, it can improve the integration degree of the energy storage system and enhance the stability of the energy storage system. On the other hand, when the energy storage system is transported, the energy storage system only occupies the space of the first housing and the second housing, which is convenient for the transportation of the energy storage system. The width and height of the outer shell of the battery cell are both smaller than the length of the outer shell. A plurality of battery cells are arranged along the width direction of the outer shell to form a battery cell assembly, and the electrode terminals are arranged at at least one end of the outer shell along the length direction, which can enable the plurality of electrode terminals of the battery cell assembly to occupy the space of the battery cell assembly in the battery device along the length direction of the outer shell, reduce the space waste along the width direction of the battery cell, thereby reducing the space waste in the battery device, improving the volume energy density of the battery device, and further improving the volume energy density of the energy storage system.

[0007] In some embodiments, the battery device includes two battery cell assemblies arranged along the length direction of the first housing, and each battery cell assembly includes a plurality of battery cells arranged along the width direction of the first housing. In this way, the two battery cell assemblies are arranged along the length direction of the first housing, and the length direction of the battery cells in the battery cell assembly extends along the length direction of the first housing, which can reduce the influence of the size of the battery cells on the size of the battery device in the height direction, so that the battery device can have a smaller size in the height direction, enabling the first housing and the second housing to accommodate more battery devices in the height direction and improving the volume energy density of the energy storage system.

[0008] In some embodiments, the electrode terminals of the battery cells in one battery cell assembly are arranged back-to-back with the electrode terminals of the battery cells in the other battery cell assembly. In this way, the electrode terminals of the two battery cell assemblies are arranged back-to-back, which can reduce the risk of interference between the electrode terminals of the two battery cell assemblies.

[0009] In some embodiments, the battery cell is a laminated battery cell. The battery cell includes a pressure relief mechanism and two electrode terminals with opposite polarities. The outer shell includes a first wall portion and a second wall portion oppositely arranged along the length direction. Both electrode terminals are arranged on the first wall portion, and the pressure relief mechanism is arranged on the second wall portion. In this way, the electrode terminals of the battery cell are arranged away from the pressure relief mechanism, reducing the risk of interference between the pressure relief mechanism and the electrode terminals and enhancing the stability of the battery cell.

[0010] In some embodiments, the two battery cell assemblies are connected in series, and each battery cell assembly includes 33 to 36 battery cells, and the 33 to 36 battery cells are connected in series. In this way, the battery device can have a relatively high voltage, which is beneficial to adjusting the output voltage and input voltage of the energy storage system.

[0011] In some embodiments, each battery cell assembly includes 34 battery cells, or each battery cell assembly includes 35 battery cells. When there are 34 battery cells in series in the battery cell assembly, the battery device includes 68 battery cells in series, which increases the input or output voltage of the battery device.

[0012] In some embodiments, the battery cell includes an electrode assembly, and the electrode assembly is a laminated electrode assembly. In this way, the energy density of the battery cell is relatively high, which helps to increase the volumetric energy density of the energy storage system.

[0013] In some embodiments, the dimension of the housing in the length direction of the housing is 465 mm - 525 mm; and / or, the dimension of the housing in the width direction of the housing is 49 mm - 60 mm; and / or, the dimension of the housing in the height direction of the housing is 163 mm - 184 mm. In this way, both the width and height of the battery cell are smaller than the length. When the length of a single battery cell extends along the length direction of the first compartment, it can reduce the height space occupied by a single battery cell in the battery device, and the electrode terminal is arranged at at least one end of the battery cell along the length direction, which can reduce the height of the battery device with reference to the height of the battery cell, thereby reducing the space occupied by the battery device in the height direction, improving the space utilization rate of the first compartment and the second compartment in the height direction, making the battery cells arranged along the length direction in the first compartment and the second compartment more compact, so that more battery cells can be accommodated in the first compartment and the second compartment, and the volumetric energy density of the energy storage system is increased.

[0014] In some embodiments, the electrode terminal is arranged at at least one end of the housing along the length direction of the first compartment. In this way, the electrode terminal is arranged at at least one end of the housing along the length direction of the first compartment, which can reduce the space occupied by the battery cell in the height direction of the first compartment, so that a battery device with a smaller height dimension can be set to adapt to the installation of the battery cell, which can reduce the height space occupied by the battery device in the first compartment or the second compartment, thereby facilitating the accommodation of more battery devices in the first compartment and the second compartment, and increasing the volumetric energy density of the energy storage system.

[0015] In some embodiments, the number of battery devices in the first compartment is equal to the number of battery devices in the second compartment. In this way, the total energy of the first compartment and the second compartment after accommodating the battery devices is equal, improving the compatibility of the first compartment and the second compartment.

[0016] In some embodiments, the number of battery devices in the first compartment is 36. In this way, all the battery devices in the first compartment can be arranged in rows and columns, improving the space utilization rate of the first compartment, and further increasing the volumetric energy density of the energy storage system.

[0017] In some embodiments, the number of battery devices in the second bin is 36. In this way, all the battery devices in the second bin can be arranged in rows and columns, improving the space utilization rate of the second bin and thus enhancing the volume energy density of the energy storage system.

[0018] In some embodiments, the number of battery devices in the first bin is 36, and the number of battery devices in the second bin is 36. In this way, it is convenient to arrange the battery devices in the first bin or the second bin, improving the compatibility between the first bin and the second bin.

[0019] In some embodiments, the multiple battery devices located in the first bin are arranged in 9 rows and 4 columns. Each row of battery devices is arranged along the length direction of the first bin, and each column of battery devices is arranged along the height direction of the first bin. In this way, the battery devices in the first bin are arranged more compactly, which can reduce the space waste of the first bin and enhance the volume energy density of the first bin.

[0020] In some embodiments, the multiple battery devices located in the second bin are arranged in 9 rows and 4 columns. Each row of battery devices is arranged along the length direction of the first bin, and each column of battery devices is arranged along the height direction of the first bin. In this way, the battery devices in the second bin are arranged more compactly, which can reduce the space waste of the second bin and enhance the volume energy density of the second bin.

[0021] In some embodiments, the multiple battery devices located in the first bin are arranged in 9 rows and 4 columns, and the multiple battery devices located in the second bin are arranged in 9 rows and 4 columns. Each row of battery devices is arranged along the length direction of the first bin, and each column of battery devices is arranged along the height direction of the first bin. In this way, there are 9 battery devices arranged along the height direction and 4 battery devices arranged along the length direction in both the first bin and the second bin, which can reduce the space waste in the first bin and the second bin and improve the space utilization rate of the first bin and the second bin.

[0022] In some embodiments, the dimension of the first bin along the height direction and the dimension of the second bin along the height direction are both smaller than the dimension of a standard container along the height direction. In this way, compared with a standard container, the first bin and the second bin can have a smaller volume, so that the first bin and the second bin can have a larger volume energy density after accommodating the battery devices.

[0023] In some embodiments, the number of battery devices in the first bin is 30. In this way, the battery devices in the first bin can be arranged in 10 rows and 3 columns or 6 rows and 5 columns, which can make the battery devices in the first bin arranged more compactly, reduce the space waste of the first bin, and enhance the volume energy density of the first bin.

[0024] In some embodiments, the number of battery devices in the second chamber is 30. In this way, the battery devices in the second chamber can be arranged in 10 rows and 3 columns or 6 rows and 5 columns, enabling the battery devices in the second chamber to be arranged more compactly, reducing the waste of space in the second chamber, and improving the volume energy density of the second chamber.

[0025] In some embodiments, the number of battery devices in the first chamber is 30, and the number of battery devices in the second chamber is 30. In this way, it is convenient to arrange the battery devices in the first chamber or the second chamber, and the compatibility between the first chamber and the second chamber is improved.

[0026] In some embodiments, the multiple battery devices located in the first chamber are arranged in 10 rows and 3 columns. Each row of battery devices is arranged along the length direction of the first chamber, and each column of battery devices is arranged along the height direction of the first chamber. In this way, all the battery devices in the first chamber are arranged in rows and columns, reducing the waste of space in the first chamber and improving the volume energy density of the first chamber.

[0027] In some embodiments, the multiple battery devices located in the second chamber are arranged in 10 rows and 3 columns. Each row of battery devices is arranged along the length direction of the first chamber, and each column of battery devices is arranged along the height direction of the first chamber. In this way, all the battery devices in the second chamber are arranged in rows and columns, reducing the waste of space in the second chamber and improving the volume energy density of the second chamber.

[0028] In some embodiments, the multiple battery devices located in the first chamber are arranged in 10 rows and 3 columns, and the multiple battery devices located in the second chamber are arranged in 10 rows and 3 columns. Each row of battery devices is arranged along the length direction of the first chamber, and each column of battery devices is arranged along the height direction of the first chamber. In this way, the arrangement of the battery devices in the first chamber and the second chamber is more regular, which is beneficial to the installation and maintenance of the battery devices.

[0029] In some embodiments, the multiple battery devices located in the first chamber are arranged in 12 rows and 3 columns, and the multiple battery devices located in the second chamber are arranged in 9 rows and 4 columns. Each row of battery devices is arranged along the length direction of the first chamber, and each column of battery devices is arranged along the height direction of the first chamber. In this way, the space occupied by the battery devices along the length direction of the first chamber can be reduced, which is beneficial for the first chamber to accommodate other components and improves the volume utilization rate of the first chamber.

[0030] In some embodiments, the dimension of the first chamber along the height direction is greater than the dimension of a standard container along the height direction; the dimension of the second chamber along the height direction is less than the dimension of a standard container along the height direction. In this way, the first chamber and the second chamber can adjust their heights according to the number of internal components to be accommodated, which is beneficial to improving the space utilization rate of the first chamber and the second chamber.

[0031] In some embodiments, the power conversion device includes a first power converter disposed in a first chamber. The plurality of battery devices located in the first chamber include a plurality of first battery clusters, and each first battery cluster includes a plurality of battery devices connected in series. The first power converter is electrically connected to at least one first battery cluster; and / or, the power conversion device includes a second power converter disposed in a second chamber. The plurality of battery devices located in the second chamber include a plurality of second battery clusters, and each second battery cluster includes a plurality of battery devices connected in series. The second power converter is electrically connected to at least one second battery cluster. By electrically connecting the first battery cluster with the first power converter, the first power converter can achieve the input or output of the electrical energy of the first battery cluster, enabling the plurality of first battery clusters to be respectively connected to electrical equipment or the power grid, thereby improving the performance of the first chamber. By electrically connecting the second battery cluster with the second power converter, the second power converter can achieve the input or output of the electrical energy of the second battery cluster, enabling the plurality of second battery clusters to be respectively connected to electrical equipment or the power grid, thereby improving the performance of the second chamber.

[0032] In some embodiments, the energy storage system further includes a first sub-control module. The first sub-control module includes a first control part and a second control part. Each first power converter is electrically connected to at least one first battery cluster through a first control part, and the second control part is communicatively connected to the control module and the battery monitoring unit of the battery devices located in the first chamber; and / or, the energy storage system further includes a second sub-control module. The second sub-control module includes a third control part and a fourth control part. Each second power converter is electrically connected to at least one second battery cluster through a third control part, and the fourth control part is communicatively connected to the control module and the battery monitoring unit of the battery devices located in the second chamber. In this way, the first sub-control module can control the on / off of the first power converter and the first battery cluster, reducing the control difficulty of the first battery cluster. The control module can receive the signals of the first sub-control module to monitor and manage the signals of the first sub-control module. The second sub-control module can control the on / off of the second power converter and the second battery cluster, reducing the control difficulty of the second battery cluster. The control module can receive the signals of the second sub-control module to monitor and manage the signals of the second sub-control module.

[0033] In some embodiments, the first power converter and the corresponding first control part are integrated into one body; and / or, the second power converter and the corresponding third control part are integrated into one body. In this way, the integration degree of the first sub-control module and the first power converter is improved, and the installation difficulty of the first sub-control module and the first power converter is reduced. The integration degree of the second sub-control module and the second power converter is improved, and the installation difficulty of the second sub-control module and the second power converter is reduced.

[0034] In some embodiments, a first inverter is correspondingly provided for each first battery cluster; and / or, a second inverter is correspondingly provided for each second battery cluster. In this way, the first battery clusters and the first inverters are in one-to-one correspondence, reducing the power requirement of the first inverters and enhancing the stability of the electrical energy input or output of the first battery clusters. The second battery clusters and the second inverters are in one-to-one correspondence, reducing the power requirement of the second inverters and enhancing the stability of the electrical energy input or output of the second battery clusters.

[0035] In some embodiments, each first battery cluster includes six battery devices connected in series; and / or, each second battery cluster includes six battery devices connected in series. In this way, each first current conversion device can achieve the input or output of the electrical energy of six battery devices. Multiple first inverters are respectively electrically connected to multiple first battery clusters, reducing the risk of interference between the multiple first battery clusters and improving the performance of the first storage body. Each second current conversion device can achieve the input or output of the electrical energy of six battery devices. Multiple second inverters are respectively electrically connected to multiple second battery clusters, reducing the risk of interference between the multiple second battery clusters and improving the performance of the second storage body.

[0036] In some embodiments, the maximum operating voltage of the first inverter is 1500V; and / or, the maximum operating voltage of the second inverter is 1500V. In this way, a first battery cluster is correspondingly electrically connected to a first inverter with a maximum operating voltage of 1500V, enabling a first battery cluster to be adapted to a 1500V operating voltage. A second battery cluster is correspondingly electrically connected to a second inverter with a maximum operating voltage of 1500V, enabling a second battery cluster to be adapted to a 1500V operating voltage, improving the performance of the energy storage system.

[0037] In some embodiments, the entire thermal management module is accommodated within the first storage body. In this way, the entire thermal management module is located above the second storage body, enabling the thermal management module to cover the second storage body and improving the performance of the second storage body. The thermal management module is located within the first storage body, enabling the thermal management module to have more heat dissipation space and enhancing the heat dissipation effect of the thermal management module.

[0038] In some embodiments, the first compartment includes a first sub-compartment and a second sub-compartment, the first compartment has a first isolation layer, the first isolation layer separates the first sub-compartment and the second sub-compartment, the first sub-compartment is located above the second sub-compartment, the thermal management module is accommodated in the first sub-compartment, and the battery device located in the first compartment is accommodated in the second sub-compartment. By providing the first isolation layer, the first isolation layer can isolate the thermal management module and the battery device, reducing the risk of interference between the thermal management module and the battery device. The thermal management module is located above the battery device. On the one hand, the thermal management module can shield the battery device from sunlight and rain, reducing the impact of sunlight and rain on the battery device; on the other hand, the thermal management module is located in the first sub-compartment, so that the thermal management module can have more heat dissipation area, thereby improving the heat dissipation effect of the thermal management module.

[0039] In some embodiments, the converter device includes a first converter disposed in a first compartment, the first converter is electrically connected to a battery device in the first compartment; the first compartment also includes a third sub-compartment, a first isolation layer separates the first sub-compartment and the third sub-compartment, the first sub-compartment is located above the third sub-compartment, the first compartment has a second isolation layer, the second isolation layer separates the second sub-compartment and the third sub-compartment, the second sub-compartment and the third sub-compartment are arranged along the length direction of the first compartment, and the first converter is accommodated in the third sub-compartment. By accommodating the first converter in the third sub-compartment, the risk of interference between the first converter and the battery device can be reduced, and the heat transferred from the first converter to the battery device can also be reduced, making the use of the battery device more stable.

[0040] In some embodiments, the dimension of the first warehouse along the height direction is 2700mm-2900mm. In this way, the dimension of the first warehouse along the height direction is not equal to the dimension of the standard container along the height direction, and the height of the first warehouse can be adjusted according to demand, thereby improving the volume energy density of the first warehouse.

[0041] In some embodiments, the first compartment includes a first sub-compartment, a second sub-compartment, and a third sub-compartment. The first compartment has a first isolation layer and a second isolation layer. The first sub-compartment is located on the side of the first isolation layer away from the second sub-compartment and the third sub-compartment. The second isolation layer separates the second sub-compartment and the third sub-compartment. The second sub-compartment and the third sub-compartment are both located below the first sub-compartment. The second sub-compartment and the third sub-compartment are arranged along the length direction of the first compartment. A portion of the thermal management module is accommodated in the first sub-compartment, and another portion is accommodated in the third sub-compartment. By separating the battery device and the thermal management module by the first isolation layer and the second isolation layer, the risk of interference between the battery device and the thermal management module can be reduced. By accommodating a portion of the thermal management module in the first sub-compartment and another portion in the third sub-compartment, the difficulty of setting the thermal management module can be reduced.

[0042] In some embodiments, the battery device includes a thermal management component. The thermal management module includes a condenser, a pumping device, a heat exchanger, a compressor, a throttling device, and a fan. The fan is used to dissipate heat from the condenser. The pumping device, the heat exchanger, and the thermal management component located in the first chamber are connected to form a first cooling circulation loop. The pumping device, the heat exchanger, and the thermal management component located in the second chamber are connected to form a second cooling circulation loop. The compressor, the condenser, the throttling device, and the heat exchanger are connected to form a refrigerant circulation loop. At least the condenser and the fan are accommodated in the first sub-chamber, and at least one of the pumping device, the compressor, the throttling device, and the heat exchanger is accommodated in the third sub-chamber. By accommodating the condenser and the fan in the first sub-chamber, the condenser and the fan are located at the top of the first chamber, which is beneficial for the fan to dissipate heat from the condenser and improve the condensation performance of the condenser.

[0043] In some embodiments, the power conversion device includes a first power converter disposed in the first chamber. The first power converter is electrically connected to the battery device located in the first chamber. The first power converter and the battery device accommodated in the first chamber are accommodated in the second sub-chamber. By arranging the first power converter and the battery device to be both accommodated in the second sub-chamber, the space of the second sub-chamber can be fully utilized, the space waste of the second sub-chamber can be reduced, and the space utilization rate of the second sub-chamber can be improved.

[0044] In some embodiments, the dimension of the first chamber in the height direction is 2600 mm - 2800 mm. The dimension of the first chamber in the height direction is smaller than that of a standard container in the height direction, which can reduce the volume of the first chamber, thereby improving the volume energy density of the first chamber.

[0045] In some embodiments, the first chamber includes a second sub-chamber and a third sub-chamber. The first chamber has a second isolation layer that separates the second sub-chamber and the third sub-chamber. The second sub-chamber and the third sub-chamber are arranged along the length direction of the first chamber. The battery device located in the first chamber is accommodated in the second sub-chamber, and the thermal management module is accommodated in the third sub-chamber. By providing the second isolation layer, the second isolation layer can reduce the risk of interference between the battery device and the thermal management module. By arranging the thermal management module in the third sub-chamber, on the one hand, the thermal management module is located above the second chamber, which is beneficial for the heat dissipation of the thermal management module and reduces the influence of the heat dissipation of the thermal management module on the battery device in the first chamber. On the other hand, the thermal management module and the battery device in the first sub-chamber are arranged along the length direction, which can reduce the height of the thermal management module and the maintenance difficulty of the thermal management module.

[0046] In some embodiments, the current conversion device includes a first current converter disposed in a first chamber, and the first current converter is electrically connected to a battery device located in the first chamber; the first current converter is accommodated in a second sub-chamber. By accommodating the first current converter in the second sub-chamber, the risk of interference between the first current converter and the thermal management module can be reduced, and the first current converter and the battery device are accommodated in the second sub-chamber, which can make full use of the space of the second sub-chamber and improve the space utilization rate of the second sub-chamber.

[0047] In some embodiments, the control module is accommodated in a second chamber. In this way, it is beneficial to the maintenance and operation of the control module located in the second chamber and reduces the maintenance difficulty of the control module.

[0048] In some embodiments, the second chamber includes a fourth sub-chamber and a fifth sub-chamber. The second chamber has a third isolation layer that separates the fourth sub-chamber and the fifth sub-chamber, and the fourth sub-chamber and the fifth sub-chamber are arranged along the length direction of the first chamber; the battery device located in the second chamber is accommodated in the fourth sub-chamber, and the control module is accommodated in the fifth sub-chamber. By setting the control module to be accommodated in the fifth sub-chamber, the risk of interference between the battery device and the control module can be reduced.

[0049] In some embodiments, the energy storage system further includes a power distribution module and a fire control module, and both the control module and the fire control module are electrically connected to the power distribution module; the control module, the power distribution module, and the fire control module are all accommodated in the fifth sub-chamber. By arranging the control module, the power distribution module, and the fire control module in the fifth sub-chamber, the heights of the control module, the power distribution module, and the fire control module are relatively low, which is convenient for the maintenance and repair of the fire control module, the power distribution module, and the fire control module.

[0050] In some embodiments, the current conversion device includes a second current converter disposed in the second chamber, and the second current converter is electrically connected to a battery device located in the second chamber, and the second current converter is accommodated in the fourth sub-chamber. In this way, the fourth sub-chamber accommodates the second current converter and the battery device, which can reduce the space waste of the fourth sub-chamber and improve the space utilization rate of the fourth sub-chamber.

[0051] In some embodiments, the fire control module is located below the power distribution module. In this way, the fire control module can have a lower position, which is beneficial to the use and maintenance of the fire control module and improves the reliability of the energy storage system.

[0052] In some embodiments, the current conversion device includes a second current converter disposed in the second chamber, and the second current converter is electrically connected to a battery device located in the second chamber, and the second current converter is accommodated in the fifth sub-chamber. In this way, the second current converter and the battery device located in the fourth sub-chamber are separated by the third isolation layer, reducing the risk of interference between the second current converter and the battery device located in the fourth sub-chamber and improving the reliability of the second chamber.

[0053] In some embodiments, both the fire control module and the second converter are located on one side of the power distribution module along the width direction of the first bin, and the fire control module is located below the second converter. In this way, the heights of the second converter, the fire control module, and the power distribution module are relatively low, facilitating the maintenance of the second converter, the fire control module, and the power distribution module. Moreover, the fire control module is located below the second converter, further facilitating the use and maintenance of the fire control module and improving the reliability of the energy storage system.

[0054] In some embodiments, the dimension of the second bin along the height direction is 2300 mm - 2500 mm. The dimension of the second bin along the height direction is smaller than that of a standard container along the height direction, which can reduce the volume of the second bin and thus increase the volume energy density of the second bin.

[0055] In some embodiments, the energy storage system further includes a fixing member configured to connect the first bin and the second bin; wherein, the fixing member includes a support member disposed between the first bin and the second bin along the height direction. In this way, by providing the fixing member, the connection between the first bin and the second bin is made more stable.

[0056] In some embodiments, the sum of the dimension of the first bin along the height direction, the dimension of the second bin along the height direction, and the dimension of the support member along the height direction is greater than or equal to the dimension of a standard container along the height direction. In this way, the energy storage system can have a relatively large dimension in the height direction, which is beneficial to increasing the space of the first bin and the second bin along the height direction, enabling more battery devices to be arranged along the height direction in the first bin and the second bin, and increasing the volume energy density of the energy storage system.

[0057] In some embodiments, the sum of the dimension of the first bin along the height direction and the dimension of the second bin along the height direction is greater than or equal to the dimension of a standard container along the height direction. In this way, the first bin and the second bin can have more space in the height direction, which is beneficial to arranging more battery devices along the height direction in the first bin and the second bin, and increasing the volume energy density of the energy storage system.

[0058] In some embodiments, the dimensions of the first bin and the second bin along their length directions are both consistent with the dimension of a standard container along the length direction, and the dimensions of the first bin and the second bin along their width directions are both consistent with the dimension of a standard container along the width direction. In this way, the floor areas of the first bin and the second bin are the same as that of a standard container, which can reduce the transportation difficulty of the first bin and the second bin and lower the transportation cost.

[0059] In some embodiments, the total energy of the energy storage system is 9 MWh - 11 MWh. In this way, the energy storage system can have a relatively high energy, improving the performance of the energy storage system.

[0060] In some embodiments, the total weight of the first bin body and the components disposed in the first bin body is less than or equal to 36 tons; and / or, the total weight of the second bin body and the components disposed in the second bin body is less than or equal to 36 tons. In this way, the weights of both the first bin body and the second bin body do not exceed 36 tons, facilitating the transportation of the first bin body and the second bin body and reducing the transportation cost.

[0061] In some embodiments, the standard container is a 20-foot standard container. In this way, the first bin body and the second bin body can have a relatively large size to accommodate the battery device, improving the practicability of the first bin body and the second bin body. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0063] Figure 1 Structural schematic diagram of an energy storage system provided by some embodiments of the present application;

[0064] Figure 2 Structural schematic diagram of a battery device provided by some embodiments of the present application;

[0065] Figure 3 Structural schematic diagram of a battery device provided by some other embodiments of the present application;

[0066] Figure 4 Structural schematic diagram of a battery cell provided by some embodiments of the present application;

[0067] Figure 5 Structural schematic diagram of an energy storage system provided by some other embodiments of the present application;

[0068] Figure 6 Structural schematic diagram of an energy storage system provided by some further embodiments of the present application;

[0069] Figure 7 Structural schematic diagram of an energy storage system provided by some other embodiments of the present application;

[0070] Figure 8 Frame schematic diagram of a control module, a first sub-control module, a second sub-control module, and a battery device in an energy storage system provided by some embodiments of the present application;

[0071] Figure 9 Frame schematic diagram of a current conversion device, a first sub-control module, a second sub-control module, and a battery device in an energy storage system provided by some embodiments of the present application;

[0072] Figure 10 Schematic structural diagram of an energy storage system provided for some embodiments of the present application (the thermal management module is housed in the first sub-compartment);

[0073] Figure 11 Schematic structural diagram of an energy storage system provided for some embodiments of the present application (the thermal management module is housed in the first sub-compartment and the third sub-compartment);

[0074] Figure 12 Schematic structural diagram of a thermal management module provided for some embodiments of the present application;

[0075] Figure 13 Schematic structural diagram of an energy storage system provided for some embodiments of the present application (the thermal management module is housed in the third sub-compartment);

[0076] Figure 14 Schematic structural diagram of an energy storage system provided for some embodiments of the present application (the control module is housed in the fifth sub-compartment);

[0077] Figure 15 Assembly drawing of the second compartment body and the control module provided for some embodiments of the present application;

[0078] Figure 16 Assembly drawing of the second compartment body and the control module provided for some other embodiments of the present application;

[0079] Figure 17 Assembly drawing of the first compartment body and the second compartment body provided for some embodiments of the present application;

[0080] Figure 18 Schematic structural diagram of a fixing member provided for some embodiments of the present application.

[0081] Icons: 10 - battery device; 1a - battery cell assembly; 1 - battery cell; 11 - housing; 111 - first wall portion; 112 - second wall portion; 12 - electrode terminal; 2 - box body; 21 - first box body; 22 - second box body; 3 - thermal management component; 4 - pressure relief mechanism;

[0082] 20 - first compartment body; 201 - first sub-compartment; 202 - second sub-compartment; 203 - third sub-compartment; 204 - first isolation layer; 205 - second isolation layer; 30 - second compartment body; 301 - fourth sub-compartment; 302 - fifth sub-compartment; 303 - third isolation layer;

[0083] 40 - control module; 401 - power distribution module; 402 - fire control module; 403 - first sub-control module; 4031 - first control part; 4032 - second control part; 404 - second sub-control module; 4041 - third control part; 4042 - fourth control part;

[0084] 50 - Thermal management module; 501 - Condenser; 502 - Pumping device; 503 - Heat exchanger; 504 - Compressor; 505 - Throttling device; 506 - Fan; 507 - First cooling circulation loop; 508 - Second cooling circulation loop; 509 - Refrigerant circulation loop;

[0085] 60 - Converter device; 601 - First converter; 602 - Second converter;

[0086] 70 - Fixing member; 701 - Support member; 7011 - Through hole; 7012 - Accommodation cavity; 702 - Locking accessory; 7021 - First locking portion; 7022 - Second locking portion; 7023 - Connecting portion; 703 - Driving arm; 100 - Energy storage system; X - Length direction; Y - Width direction; Z - Height direction. Detailed implementation manners

[0087] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0088] Unless otherwise defined, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments, and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non - exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above drawings are used to distinguish different objects, rather than to describe a specific order or primary - secondary relationship.

[0089] Referring to "embodiments" in the present application means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0090] In this application, the term "and / or" is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0091] In the embodiments of this application, the same reference numerals represent the same components. And for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components shown in the drawings in the embodiments of this application, as well as the overall thickness, length, width, etc. of the integrated device, are only illustrative and should not constitute any limitation to this application.

[0092] The term "a plurality of" as used in this application refers to two or more (including two).

[0093] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, a magnesium-ion battery cell, etc., and the embodiments of this application do not limit this. The battery cell can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, and the embodiments of this application do not limit this either.

[0094] The battery mentioned in the embodiments of this application may include one or more battery cells to provide a single physical module with a higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0095] In some embodiments, the battery can be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0096] In some embodiments, the battery can be a battery pack, and the battery pack includes a housing box and battery cells, and the battery cells or battery modules are accommodated in the housing box.

[0097] In some embodiments, the energy storage system includes an energy storage container, an energy storage cabinet, etc.

[0098] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can play a role in preventing short circuit between the positive and negative electrodes, and at the same time allow active ions to pass through.

[0099] Optionally, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0100] Optionally, the electrode assembly is a stacked structure.

[0101] Optionally, the shape of the electrode assembly may be cylindrical, flat, prismatic, or the like.

[0102] In some embodiments, the energy storage system may include a battery device and a housing, and the battery device is accommodated in the housing. The battery device includes a plurality of battery cells.

[0103] In some embodiments, the energy storage system may further include a current conversion device, which is electrically connected to the battery device to convert the DC electrical energy of the battery device into AC electrical energy for facilitating the electrical energy output of the battery device, or to convert the AC electrical energy of an external circuit into DC electrical energy for facilitating the electrical energy storage of the battery device.

[0104] In some embodiments, the energy storage system may further include a control module, which is used for electrically controlling the battery device.

[0105] In some embodiments, the energy storage system may further include a thermal management module, which is used for managing the temperature of the battery device.

[0106] The energy storage system may be an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system, or a temporary power supply system, etc. The energy storage power station can store electrical energy during low electricity consumption periods and provide electrical energy to relevant users or electrical equipment during high electricity consumption periods. After the wind energy collected by the wind turbines of the wind power generation system is converted into electrical energy, it is stored by the energy storage system. The solar power generation system can convert solar energy into electrical energy, which is then stored by the energy storage system and supplied to users at the right time. The mobile power system can supply power to relevant electrical equipment in places where the grid power supply system cannot reach, such as remote mountainous areas and remote wilderness areas. The temporary power supply system can supply power to users in case of insufficient power supply.

[0107] Power stations have increasingly higher requirements for the volume energy density of energy storage systems. Since energy storage systems usually need to be provided with a thermal management module, a control module, and a current conversion device to perform temperature control and electrical control on the battery device in the energy storage system. The thermal management module and the control module will occupy the volume of the energy storage system, restricting the installation space of the battery device. Therefore, when considering the volume of the energy storage system, the arrangement method of the battery cells becomes particularly important. An improper arrangement method of the battery cells is likely to cause waste of the space of the battery device, affecting the volume energy density of the battery device, and further affecting the volume energy density of the energy storage system. Therefore, there is a contradiction between the improvement of the volume energy density and the arrangement of the battery cells.

[0108] In view of this, an embodiment of the present application provides an energy storage system, including a first bin, a second bin, a control module, a thermal management module, a current conversion device, and a plurality of battery devices; a plurality of battery devices are accommodated in both the first bin and the second bin, the first bin and the second bin are stacked in the height direction, the first bin is located above the second bin, and at least one of the dimension of the first bin in the height direction and the dimension of the second bin in the height direction is smaller than the dimension of a standard container in the height direction; the control module is used for electrically controlling the plurality of battery devices in the first bin and the second bin; the control module is accommodated in one of the first bin and the second bin, or a part of the control module is accommodated in the first bin and another part is accommodated in the second bin; the thermal management module is used for managing the temperature of the plurality of battery devices in the first bin and the second bin; the thermal management module is accommodated in one of the first bin and the second bin, or a part of the thermal management module is accommodated in the first bin and another part is accommodated in the second bin; the current conversion device is electrically connected to the plurality of battery devices, and at least one of the first bin and the second bin accommodates the current conversion device; wherein, each battery device includes a plurality of battery cells, the plurality of battery cells include a housing and electrode terminals, both the width and the height of the housing are smaller than the length of the housing, the plurality of battery cells are arranged in the width direction of the housing to form a battery cell assembly, and along the length direction of the housing, the electrode terminals are arranged at at least one end of the housing.

[0109] In such an energy storage system, the battery devices, the control module, the thermal management module, and the current conversion device are all accommodated in the first bin and the second bin. On the one hand, it can reduce the space waste of the energy storage system. On the other hand, it can improve the integration degree of the energy storage system and enhance the stability of the energy storage system. On the third hand, when the energy storage system is transported, the energy storage system only occupies the space of the first bin and the second bin, which is convenient for the transportation of the energy storage system. The width and height of the housing of the battery cell are both smaller than the length of the housing, the plurality of battery cells are arranged in the width direction of the housing to form a battery cell assembly, and the electrode terminals are arranged at at least one end of the housing along the length direction, which can enable the plurality of electrode terminals of the battery cell assembly to occupy the space of the battery cell assembly in the energy storage device along the length direction of the housing, reduce the space waste along the width direction of the battery cell, thereby reducing the space waste in the battery device, improving the volume energy density of the battery device, and further improving the volume energy density of the energy storage system.

[0110] The energy storage system will be described below with reference to the accompanying drawings.

[0111] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of an energy storage system 100 provided by some embodiments of the present application; Figure 2 is a schematic structural diagram of a battery device 10 provided by some embodiments of the present application; Figure 3Schematic diagram of the structure of the battery device 10 provided by some other embodiments of the present application. An energy storage system 100 provided by an embodiment of the present application includes a first bin 20, a second bin 30, a control module 40, a thermal management module 50, a current conversion device 60, and a plurality of battery devices 10. A plurality of battery devices 10 are accommodated in both the first bin 20 and the second bin 30. The first bin 20 and the second bin 30 are stacked along the height direction Z, the first bin 20 is located above the second bin 30, and at least one of the dimension of the first bin 20 along the height direction Z and the dimension of the second bin 30 along the height direction Z is smaller than the dimension of a standard container along the height direction Z. The control module 40 is configured to perform electrical control on the plurality of battery devices 10 in the first bin 20 and the second bin 30. The control module 40 is accommodated in one of the first bin 20 and the second bin 30, or a part of the control module 40 is accommodated in the first bin 20 and another part is accommodated in the second bin 30. The thermal management module 50 is configured to manage the temperature of the plurality of battery devices 10 in the first bin 20 and the second bin 30. The thermal management module 50 is accommodated in one of the first bin 20 and the second bin 30, or a part of the thermal management module 50 is accommodated in the first bin 20 and another part is accommodated in the second bin 30. The current conversion device 60 is electrically connected to the plurality of battery devices 10, and the current conversion device 60 is accommodated in at least one of the first bin 20 and the second bin 30. Wherein, each battery device 10 includes a plurality of battery cells 1, the plurality of battery cells 1 include a housing 11 and electrode terminals 12, both the width and the height of the housing 11 are smaller than the length of the housing 11, and the plurality of battery cells 1 are arranged along the width direction of the housing 11 to form a battery cell assembly 1a, and along the length direction of the housing 11, the electrode terminals 12 are provided at at least one end of the housing 11.

[0112] The battery device 10 may include a box body 2 and battery cells 1, and the box body 2 is used to accommodate the battery cells 1. Wherein, a sealed space for accommodating the battery cells 1 is formed inside the box body 2. The box body 2 may adopt various structures. In some embodiments, the box body 2 may include a first box body 21 and a second box body 22, and the first box body 21 and the second box body 22 are buckled with each other. The first box body 21 and the second box body 22 may be of various shapes, for example, a cuboid. The first box body 21 may be a hollow structure with one side open, and the second box body 22 may also be a hollow structure with one side open. The open side of the second box body 22 and the open side of the first box body 21 are buckled with each other, then a box body 2 with a closed space is formed. It may also be that the first box body 21 is a hollow structure with one side open, and the second box body 22 is a plate-like structure, and the second box body 22 is buckled on the open side of the first box body 21, then a box body 2 with an accommodation space is formed.

[0113] In the battery device 10, there are multiple battery cells 1. The multiple battery cells 1 can be connected in series, in parallel, or in a combined series-parallel connection. A combined series-parallel connection means that among the multiple battery cells 1, there are both series and parallel connections. It can be that multiple battery cells 1 are first connected in series, in parallel, or in a combined series-parallel connection to form a battery cell assembly 1a, and then multiple battery cell assemblies 1a are connected in series, in parallel, or in a combined series-parallel connection to form an entirety, which is accommodated in the box body 2. It can also be that all the battery cells 1 are directly connected in series, in parallel, or in a combined series-parallel connection together, and then the entirety formed by all the battery cells 1 is accommodated in the box body 2. Multiple battery devices 10 are accommodated in the first compartment 20. Multiple battery devices 10 are accommodated in the second compartment 30. The number of battery devices 10 in the first compartment 20 and the number of battery devices 10 in the second compartment 30 can be the same or different.

[0114] The first compartment 20 and the second compartment 30 are stacked along the height direction Z, and the first compartment 20 is located above the second compartment 30 to enable the second compartment 30 to support the first compartment 20. The length direction X, width direction Y, and height direction Z of the first compartment 20 are respectively consistent with the length direction X, width direction Y, and height direction Z of the second compartment 30.

[0115] The dimension of the first compartment 20 along the height direction Z and the dimension of a standard container along the height direction Z can be equal; it can also be that the dimension of the first compartment 20 along the height direction Z is smaller than the dimension of the standard container along the height direction Z; it can also be that the dimension of the first compartment 20 along the height direction Z is larger than the dimension of the standard container along the height direction Z. The dimension of the second compartment 30 along the height direction Z and the dimension of the standard container along the height direction Z can be equal; it can also be that the dimension of the second compartment 30 along the height direction Z is smaller than the dimension of the standard container along the height direction Z; it can also be that the dimension of the second compartment 30 along the height direction Z is larger than the dimension of the standard container along the height direction Z. Among them, taking a 20-foot standard container as an example, the dimension of the standard container along the height direction Z can be 2896 mm, and the dimension of at least one of the first compartment 20 and the second compartment 30 along the height direction Z is smaller than 2896 mm.

[0116] The dimensions of the first compartment 20 along the length direction X and along the width direction Y and the dimensions of the standard container along the length direction X and along the width direction Y can be equal or not equal. The dimensions of the second compartment 30 along the length direction X and along the width direction Y and the dimensions of the standard container along the length direction X and along the width direction Y can be equal or not equal.

[0117] Optionally, for containers of various sizes, the dimensions within ±5% of their sizes can be regarded as dimensions within the tolerance range. It can be understood that the first compartment 20 and the second compartment 30 can also be referred to as containers.

[0118] The standard container can be the size of the standard container (GB / T 1413-2023) during transportation, such as 20-foot, 30-foot, 40-foot or 45-foot, which meets the corresponding standards, and its length, width and height have corresponding dimensions respectively.

[0119] The 20-foot container can include: the dimension in the length direction X is 6058mm, with a tolerance of 0mm - 6mm; the dimension in the width direction Y is 2438mm, with a tolerance of 0mm - 5mm; and the dimension in the height direction Z is 2896mm, 2591mm or not greater than 2438mm; the tolerance is 0mm - 5mm.

[0120] The 30-foot container can include: the dimension in the length direction X is 9125mm, with a tolerance of 0mm - 10mm; the dimension in the second direction is 2438mm, with a tolerance of 0mm - 5mm; and the dimension in the height direction Z is 2896mm, 2591mm or not greater than 2438mm; the tolerance is 0mm - 5mm.

[0121] The 40-foot container can include: the dimension in the length direction X is 12192mm, with a tolerance of 0mm - 10mm; the dimension in the width direction Y is 2438mm, with a tolerance of 0mm - 5mm; and the dimension in the height direction Z is 2896mm, 2591mm or not greater than 2438mm; the tolerance is 0mm - 5mm.

[0122] The 45-foot container can include: the dimension in the length direction X is 13716mm, with a tolerance of 0mm - 10mm; the dimension in the width direction Y is 2438mm, with a tolerance of 0mm - 5mm; and the dimension in the height direction Z is 2591mm or 2896mm; the tolerance is 0mm - 5mm.

[0123] It is possible that the entire control module 40 is accommodated within the first housing 20; it is also possible that the entire control module 40 is accommodated within the second housing 30; it is also possible that the control module 40 includes multiple control units, and a part of the multiple control units is accommodated within the first housing 20, and the other part is accommodated within the second housing 30, and the multiple control units jointly perform electrical control on the battery devices 10 within the first housing 20 and the second housing 30. Electrical control refers to low-voltage communication control. For example, the first housing 20 is provided with a first sub-control module 403, and the first sub-control module 403 can be used to control the on / off of the electrical connection between the current conversion device 60 and the battery device 10 located within the first housing 20. The second housing 30 is provided with a second sub-control module 404, and the second sub-control module 404 can be used to control the on / off of the electrical connection between the current conversion device 60 and the battery device 10 located within the second housing 30. The first sub-control module 403 and the second sub-control module 404 are both communicatively connected to the control module 40 to achieve the electrical control of the multiple battery devices 10 within the first housing 20 and the second housing 30 by the control module 40.

[0124] The thermal management module 50 can manage the temperatures of all the battery devices 10 within the first housing 20 and the second housing 30, reducing the risk of temperature runaway of the battery devices 10. It is possible that the entire thermal management module 50 is accommodated within the first housing 20; it is also possible that the entire thermal management module 50 is accommodated within the second housing 30; it is also possible that a part of the thermal management module 50 is accommodated within the first housing 20, and the other part is accommodated within the second housing 30. For example, the thermal management module 50 includes multiple thermal management units. It is possible that all the thermal management units are accommodated within the first housing 20; it is also possible that all the thermal management units are accommodated within the second housing 30; it is also possible that a part of the multiple thermal management units is accommodated within the first housing 20, and the other part is accommodated within the second housing 30, and the multiple thermal management units jointly manage the temperatures of the multiple battery devices 10 within the first housing 20 and the second housing 30.

[0125] As an example, the thermal management module 50 can be a liquid cooling unit. The liquid cooling unit includes multiple thermal management units such as a pumping device 502 and a heat exchanger 503. The multiple thermal management units can be connected through pipelines, and the liquid cooling unit transports a cooling medium to the thermal management components 3 of each battery device 10 through the pipelines.

[0126] The current conversion device 60 is a device connecting an external device and the battery device 10. The external device can be a power grid, an electrical device, etc.

[0127] When the energy storage system 100 is in the charging state, the power conversion device 60 acts as a rectifier to convert the alternating current on the AC side into direct current and store it in the battery device 10. When the energy storage system 100 is in the discharging state, the power conversion device 60 acts as an inverter to convert the electrical energy stored in the battery device 10 from direct current on the DC side into alternating current and deliver it to external devices.

[0128] In the energy storage system 100, the power conversion device 60 may include a plurality of converters. Each converter may be correspondingly provided with one battery device 10, or may be correspondingly provided with a plurality of battery devices 10. In an embodiment where one converter corresponds to a plurality of battery devices 10, the number of battery devices 10 may be two, three, four, five, six, seven, eight, nine or more. The plurality of converters may all be accommodated in the first housing 20; may also all be accommodated in the second housing 30; or a part may be accommodated in the first housing 20 and another part may be accommodated in the second housing 30.

[0129] The battery cell 1 includes a housing 11 and electrode terminals 12. Both the width and height of the housing 11 are smaller than the length of the housing 11, so that the housing 11 is in the shape of a cuboid. Along the length direction of the housing 11, the housing 11 has a first wall portion 111 and a second wall portion 112 which are oppositely arranged. The electrode terminals 12 are two with opposite polarities. It is possible that both the two electrode terminals 12 are arranged on the first wall portion 111; or the two electrode terminals 12 are respectively arranged on the first wall portion 111 and the second wall portion 112. Among them, the battery cell 1 may be a short blade battery cell 1.

[0130] It is possible that the multiple battery cells 1 of the battery device 10 only form one battery cell assembly 1a, and all the battery cells 1 of the battery device 10 are arranged along the width direction of the housing 11. It is also possible that the multiple battery cells 1 of the battery device 10 form multiple battery cell assemblies 1a, and the multiple battery cells 1 of each battery cell assembly 1a are arranged along the width direction of the housing 11. In an embodiment where the battery device 10 includes multiple battery cell assemblies 1a, the multiple battery cell assemblies 1a may be arranged along the length direction X of the first housing 20; may also be arranged along the height direction Z of the first housing 20; or may be arranged in the width direction Y of the first housing 20.

[0131] The multiple battery cells 1 are arranged along the width direction of the housing 11 to form a battery cell assembly 1a. The electrode terminals 12 are arranged at at least one end of the housing 11, so that the electrode terminals 12 are not arranged between two adjacent housings 11 in the battery cell assembly 1a, thereby making the arrangement of the housings 11 of the battery cell assembly 1a more compact along the width direction Y. The electrode terminals 12 are arranged at at least one end of the housing 11 along the length direction X, so that the multiple electrode terminals 12 can jointly occupy the space on one side of the multiple housings 11 of the battery cell assembly 1a along the length direction X, reducing the waste of the internal space of the battery device 10.

[0132] The height of at least one of the first housing 20 and the second housing 30 is less than that of a standard container, which can reduce the height of the first housing 20 and the second housing 30, thereby reducing the volume of the first housing 20 and the second housing 30, and being beneficial to improving the volume energy density of the first housing 20 and the second housing 30.

[0133] In the embodiment of the present application, the battery device 10, the control module 40, the thermal management module 50 and the power conversion device 60 are all accommodated in the first housing 20 and the second housing 30. On the one hand, it can reduce the space waste of the energy storage system 100. On the other hand, it can improve the integration degree of the energy storage system 100 and enhance the stability of the energy storage system 100. On the other hand, when the energy storage system 100 is transported, the energy storage system 100 only occupies the space of the first housing 20 and the second housing 30, which is convenient for the transportation of the energy storage system 100. The width and height of the outer shell 11 of the battery cell 1 are both smaller than the length of the outer shell 11. A plurality of battery cells 1 are arranged along the width direction of the outer shell 11 to form a battery cell assembly 1a, and the electrode terminals 12 are arranged at at least one end of the outer shell 11 along the length direction X, which can enable the plurality of electrode terminals 12 of the battery cell assembly 1a to occupy the space of the battery cell assembly 1a in the battery device 10 along the length direction X of the outer shell 11, reduce the space waste of the battery cell 1 along the width direction Y, thereby reducing the space waste in the battery device 10, improving the volume energy density of the battery device 10, and further improving the volume energy density of the energy storage system 100.

[0134] In some embodiments, when the battery device 10 is accommodated in the first housing 20 and the second housing 30, the length direction of the battery cells 1 in the battery device 10 may be consistent with the length direction X of the first housing 20; the height direction Z of the battery cells 1 in the battery device 10 may be consistent with the height direction Z of the first housing 20; the width direction of the battery cells 1 in the battery device 10 may be consistent with the width direction Y of the first housing 20.

[0135] In some embodiments, please continue to refer to Figure 3 . The battery device 10 includes two battery cell assemblies 1a arranged along the length direction X of the first housing 20, and each battery cell assembly 1a includes a plurality of battery cells 1 arranged along the width direction Y of the first housing 20.

[0136] The two battery cell assemblies 1a can be connected in series or in parallel. The number of battery cells 1 in the two battery cell assemblies 1a can be equal or unequal.

[0137] In this embodiment, two battery cell assemblies 1a are arranged along the length direction X of the first housing 20, and the length direction of the battery cells 1 in the battery cell assembly 1a extends along the length direction X of the first housing 20, which can reduce the influence of the size of the battery cells 1 in the height direction Z on the size of the battery device 10, so that the battery device 10 can have a smaller size in the height direction Z, enabling the first housing 20 and the second housing 30 to accommodate more battery devices 10 in the height direction Z and improving the volumetric energy density of the energy storage system 100.

[0138] In some embodiments, the electrode terminals 12 of the battery cells 1 in one battery cell assembly 1a are arranged facing away from the electrode terminals 12 of the battery cells 1 in the other battery cell assembly 1a.

[0139] The first wall portions 111 of the outer shells 11 of one battery cell assembly 1a and the first wall portions 111 of the outer shells 11 of the other battery cell assembly 1a are arranged facing away from each other, and the electrode terminals 12 of each battery cell 1 are arranged on the first wall portions 111 of the outer shell 11 of the battery cell 1 to achieve the arrangement of the electrode terminals 12 of the two battery cell assemblies 1a facing away from each other.

[0140] In this embodiment, the electrode terminals 12 of the two battery cell assemblies 1a are arranged facing away from each other, which can reduce the risk of interference between the electrode terminals 12 of the two battery cell assemblies 1a.

[0141] In some embodiments, please continue to refer to Figure 4 . The battery cell 1 includes a pressure relief mechanism 4 and two electrode terminals 12 with opposite polarities. The outer shell 11 includes a first wall portion 111 and a second wall portion 112 arranged opposite to each other along the length direction X. Both electrode terminals 12 are arranged on the first wall portion 111, and the pressure relief mechanism 4 is arranged on the second wall portion 112.

[0142] The pressure relief mechanism 4 refers to an element or component that actuates to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 1 reaches a predetermined threshold. This threshold design varies according to different design requirements. The threshold may depend on one or several materials among the positive electrode plate, negative electrode plate, electrolyte, and separator in the battery cell 1. The pressure relief mechanism 4 can adopt forms such as an explosion-proof valve, explosion-proof sheet, gas valve, pressure relief valve, or safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery cell 1 reaches a predetermined threshold, the pressure relief mechanism 4 performs an action or a weak structure provided in the pressure relief mechanism 4 is damaged, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0143] As used in this application, "actuation" refers to the movement or activation of the pressure relief mechanism 4 to a certain state, so that the internal pressure and temperature of the battery cell 1 can be released. The movement generated by the pressure relief mechanism 4 may include, but is not limited to: at least a part of the pressure relief mechanism 4 rupturing, breaking, being torn or opened, etc. When the pressure relief mechanism 4 is actuated, the high-temperature and high-pressure substances inside the battery cell 1 will be discharged outward from the actuated part as emissions. In this way, the battery cell 1 can be depressurized and cooled under controlled pressure or temperature, thus avoiding potential more serious accidents.

[0144] In this embodiment, the electrode terminal 12 of the battery cell 1 is arranged away from the pressure relief mechanism 4, reducing the risk of interference between the pressure relief mechanism 4 and the electrode terminal 12 and improving the stability of the battery cell 1.

[0145] In some embodiments, the pressure relief mechanisms 4 of the first battery cell assembly 1a are arranged opposite to the pressure relief mechanisms 4 of another battery cell assembly 1a. The two battery cell assemblies 1a of the battery device 10 are spaced apart along the length direction X to form an exhaust passage between the two battery cell assemblies 1a, which is beneficial to the pressure relief and exhaust of the pressure relief mechanism 4.

[0146] In some embodiments, the two battery cell assemblies 1a are connected in series, and each battery cell assembly 1a includes 33 to 36 battery cells 1, and the 33 to 36 battery cells 1 are connected in series.

[0147] The two battery cell assemblies 1a are connected in series so that the number of battery cells 1 connected in series in the battery device 10 is 66 to 72.

[0148] The number of battery cells 1 connected in series in each battery cell assembly 1a can be 33, 34, 35 or 36.

[0149] In this embodiment, the battery device 10 can have a relatively high voltage, which is beneficial to adjusting the output voltage and input voltage of the energy storage system 100.

[0150] In some embodiments, each battery cell assembly 1a includes 34 battery cells 1, or each battery cell assembly 1a includes 35 battery cells 1.

[0151] When each battery cell assembly 1a includes 34 battery cells 1, the number of battery cells 1 connected in series in the battery device 10 is 68. Taking the battery cell 1 as a lithium iron phosphate battery cell 1 and the maximum voltage of the battery cell 1 being 3.61V as an example, the maximum voltage of the battery device 10 is 245.48V.

[0152] When each battery cell assembly 1a includes 35 battery cells 1, the number of battery cells 1 connected in series within the battery device 10 is 70. Taking the battery cell 1 as a lithium iron phosphate battery cell 1 and the maximum voltage of the battery cell 1 being 3.61V as an example, the maximum voltage of the battery device 10 is 252.7V.

[0153] In this embodiment, when 34 or 35 battery cells 1 in the battery cell assembly 1a are connected in series, the battery device 10 includes 68 battery cells 1 connected in series, thereby increasing the input or output voltage of the battery device 10.

[0154] In some embodiments, please continue to refer to Figure 4 , Figure 4 which is a schematic structural diagram of the battery cell 1 provided in some embodiments of the present application. The dimension of the outer shell 11 along the length direction X of the first cavity 20 is 465mm - 525mm.

[0155] The dimension L of the outer shell 11 along the length direction X of the first cavity 20 can be any value among 465mm, 466mm, 467mm, 468mm, 469mm, 470mm, 471mm, 472mm, 473mm, 474mm, 475mm, 476mm, 477mm, 478mm, 479mm, 480mm, 481mm, 482mm, 483mm, 484mm, 485mm, 486mm, 487mm, 488mm, 489mm, 490mm, 491mm, 492mm, 493mm, 494mm, 495mm, 496mm, 497mm, 498mm, 499mm, 500mm, 501mm, 502mm, 503mm, 504mm, 505mm, 506mm, 507mm, 508mm, 509mm, 510mm, 511mm, 512mm, 513mm, 514mm, 515mm, 516mm, 517mm, 518mm, 519mm, 520mm, 521mm, 522mm, 523mm, 524mm, 525mm or any value between any two of them.

[0156] In some embodiments, the dimension along the width direction Y of the first cavity 20 is 49mm - 60mm.

[0157] The dimension K of the housing 11 in the width direction Y of the first bin 20 can be a point value of any one of 49mm, 49.5mm, 50mm, 50.5mm, 51mm, 51.5mm, 52mm, 52.5mm, 53mm, 53.5mm, 54mm, 54.4mm, 54.5mm, 55mm, 55.5mm, 56mm, 56.5mm, 57mm, 57.5mm, 58mm, 58.5mm, 59mm, 59.5mm, 60mm or a point value between any two of them.

[0158] In some embodiments, the dimension in the height direction Z of the first bin 20 is 163mm - 184mm.

[0159] The dimension H of the housing 11 in the height direction Z of the first bin 20 can be a point value of any one of 163mm, 164mm, 165mm, 166mm, 167mm, 168mm, 169mm, 170mm, 171mm, 172mm, 173mm, 173.5mm, 174mm, 175mm, 176mm, 177mm, 178mm, 179mm, 180mm, 181mm, 182mm, 183mm, 184mm or a point value between any two of them.

[0160] Exemplarily, the dimension of the housing 11 in the length direction X is 500mm, the dimension in the width direction Y is 54.4mm, and the dimension in the height direction Z is 173.5mm.

[0161] In this embodiment, both the width and height of the battery cell 1 are smaller than the length. When the length of a single battery cell 1 extends in the length direction X of the first bin 20, the height space occupied by a single battery cell 1 in the battery device 10 can be reduced. And the electrode terminal 12 is arranged at at least one end of the battery cell 1 in the length direction X, which can reduce the height of the battery device 10 with reference to the height of the battery cell 1, thereby reducing the space occupied by the battery device 10 in the height direction Z, improving the space utilization rate of the first bin 20 and the second bin 30 in the height direction Z, making the battery cells 1 arranged in the length direction X in the first bin 20 and the second bin 30 more compact, so that more battery cells 1 can be accommodated in the first bin 20 and the second bin 30, and the volume energy density of the energy storage system 100 is improved.

[0162] In some embodiments, the electrode terminal 12 is arranged at at least one end of the housing 11 in the length direction X of the first bin 20.

[0163] Along the length direction X of the first cell body 20, the electrode terminals 12 can be arranged at the same end of the housing 11, or the electrode terminals 12 can be arranged at opposite ends of the housing 11. The length direction of the battery cell 1 can extend along the length direction X of the first cell body 20, and it is not required that the length of the battery cell 1 is exactly parallel to the length direction X of the first cell body 20, and it can be approximately parallel.

[0164] By arranging the length directions of all the battery cells 1 in the first cell body 20 and the second cell body 30 to extend along the length direction X of the first cell body 20. Compared with arranging the length direction X of the housing 11 parallel to the height direction Z of the first cell body 20, arranging the height direction Z of the housing 11 parallel to the height direction Z of the first cell body 20 can enable the battery cell 1 to occupy a smaller height space in the first cell body 20 or the second cell body 30, so that a battery device 10 with a smaller height can be arranged in the first cell body 20 or the second cell body 30, so that more battery devices 10 can be accommodated in the first cell body 20 and the second cell body 30. Since the electrode terminals 12 usually need to be provided with a busbar component to realize the electrical connection between adjacent battery cells 1, the busbar component and the electrode terminals 12 occupy a fixed size inside the battery device 10. When this fixed size is the size in the height direction Z (the electrode terminals 12 are arranged at at least one end of the housing 11 along the height direction Z), the space volume occupied by the busbar component and the electrode terminals 12 is the product of the size in the length direction X and the size in the width direction Y of the battery device 10 multiplied by the above fixed size. When this fixed size is the size in the length direction X (the electrode terminals 12 are arranged at at least one end of the housing 11 along the length direction X), the space volume occupied by the busbar component and the electrode terminals 12 is the product of the size in the height direction Z and the size in the width direction Y of the battery device 10 multiplied by the above fixed size; in this way, since the size in the length direction X of the battery device 10 is greater than the size in the height direction Z of the battery device 10, arranging the electrode terminals 12 at at least one end of the housing 11 along the length direction X can reduce the space waste of the battery device 10.

[0165] Both the first cell body 20 and the second cell body 30 are cabinet structures with a height and width smaller than the length. Compared with arranging components in the height direction Z of the first cell body 20 and the second cell body 30, it is relatively easier to arrange components in the length direction X of the first cell body 20 and the second cell body 30. Therefore, reducing the space occupied by the battery device 10 in the height direction Z can make the internal space of the first cell body 20 and the second cell body 30 more compact, and can accommodate more battery devices 10, improving the volume energy density of the energy storage system 100.

[0166] In some embodiments, the number of battery devices 10 in the first cell body 20 is equal to the number of battery devices 10 in the second cell body 30.

[0167] The arrangement of the battery devices 10 in the first housing 20 may be the same as or different from the arrangement of the battery devices 10 in the second housing 30.

[0168] In this embodiment, the number of the battery devices 10 in the first housing 20 is equal to the number of the battery devices 10 in the second housing 30, and the total energy of the first housing 20 and the second housing 30 after accommodating the battery devices 10 is equal, improving the compatibility between the first housing 20 and the second housing 30.

[0169] In some embodiments, the number of the battery devices 10 in the first housing 20 is 36. The battery devices 10 in the first housing 20 may be arranged in 6 rows and 6 columns, or in 9 rows and 4 columns, or in 12 rows and 3 columns.

[0170] In some embodiments, the number of the battery devices 10 in the second housing 30 is 36.

[0171] The battery devices 10 in the second housing 30 may be arranged in 6 rows and 6 columns, or in 9 rows and 4 columns, or in 12 rows and 3 columns.

[0172] In some embodiments, the number of the battery devices 10 in both the first housing 20 and the second housing 30 is 36.

[0173] The number of the battery devices 10 in the first housing 20 and the number of the battery devices 10 in the second housing 30 are both 36. The arrangement of the battery devices 10 in the first housing 20 and the arrangement of the battery devices 10 in the second housing 30 may be the same or different.

[0174] In this embodiment, it is convenient for the arrangement of the battery devices 10 in the first housing 20 or the second housing 30, improving the compatibility between the first housing 20 and the second housing 30.

[0175] In some embodiments, please refer to Figure 5 , Figure 5 which is a schematic structural diagram of the energy storage system 100 provided in some other embodiments of the present application. A plurality of battery devices 10 located in the first housing 20 are arranged in 9 rows and 4 columns, and a plurality of battery devices 10 located in the second housing 30 are arranged in 9 rows and 4 columns. Each row of battery devices 10 is arranged along the length direction X of the first housing 20, and each column of battery devices 10 is arranged along the height direction Z of the first housing 20.

[0176] The battery devices 10 in the first housing 20 are arranged in 9 rows and 4 columns, with a total of 36 battery devices 10. The number of the battery devices 10 in the second housing 30 is equal to the number of the battery devices 10 in the first housing 20, and the battery devices 10 in the second housing 30 are arranged in 9 rows and 4 columns.

[0177] In this embodiment, nine battery devices 10 are arranged along the height direction Z in both the first housing 20 and the second housing 30, and four battery devices 10 are arranged along the length direction X in both the first housing 20 and the second housing 30, which can reduce the waste of space in the first housing 20 and the second housing 30 and improve the space utilization rate of the first housing 20 and the second housing 30.

[0178] In some embodiments, the dimension of the first housing 20 along the height direction Z and the dimension of the second housing 30 along the height direction Z are both smaller than the dimension of a standard container along the height direction Z.

[0179] The dimension of the first housing 20 along the height direction Z is H1, and the dimension of the second housing 30 along the height direction Z is H2. Both H1 and H2 are smaller than 2896 mm.

[0180] The dimension of the first housing 20 along the height direction Z is smaller than the dimension of a standard container along the height direction Z, and the dimension of the second housing 30 along the height direction Z is smaller than the dimension of a standard container along the height direction Z. Taking a 20-foot standard container as an example, the height of the first housing 20 and the height of the second housing 30 are both smaller than 2896 mm.

[0181] In this embodiment, compared with a standard container, the first housing 20 and the second housing 30 can have a smaller volume, so that the first housing 20 and the second housing 30 can have a larger volume energy density after accommodating the battery devices 10.

[0182] In some embodiments, please refer to Figure 6 , Figure 6 which is a schematic structural diagram of the energy storage system 100 provided in still other embodiments of the present application. A plurality of battery devices 10 located in the first housing 20 are arranged in 12 rows and 3 columns, and a plurality of battery devices 10 located in the second housing 30 are arranged in 9 rows and 4 columns. Each row of battery devices 10 is arranged along the length direction X of the first housing 20, and each column of battery devices 10 is arranged along the height direction Z of the first housing 20.

[0183] In this embodiment, it is possible to reduce the space occupied by the battery devices 10 along the length direction X of the first housing 20, which is beneficial for the first housing 20 to accommodate other components and improve the volume utilization rate of the first housing 20.

[0184] In some embodiments, the dimension of the first housing 20 along the height direction Z is greater than the dimension of a standard container along the height direction Z. The dimension of the second housing 30 along the height direction Z is smaller than the dimension of a standard container along the height direction Z.

[0185] The dimension of the first housing 20 along the height direction Z is H1, and the dimension of the second housing 30 along the height direction Z is H2. H1 is greater than 2896 mm, and H2 is smaller than 2896 mm.

[0186] The dimension of the first bin 20 in the height direction Z is greater than that of a standard container in the height direction Z, and the dimension of the second bin 30 in the height direction Z is less than that of a standard container in the height direction Z. Taking a 20-foot standard container as an example, the height of the first bin 20 is greater than 2896 mm, and the height of the second bin 30 is less than 2896 mm.

[0187] In this embodiment, the first bin 20 and the second bin 30 can adjust their heights according to the number of internal accommodating components, which is beneficial to improving the space utilization rate of the first bin 20 and the second bin 30.

[0188] In some embodiments, the number of battery devices 10 in the second bin 30 is 30.

[0189] The battery devices 10 in the first bin 20 can be arranged in 5 rows and 6 columns, or in 6 rows and 5 columns, or in 10 rows and 3 columns.

[0190] The battery devices 10 in the second bin 30 can be arranged in 5 rows and 6 columns, or in 6 rows and 5 columns, or in 10 rows and 3 columns.

[0191] In some embodiments, the number of battery devices 10 in the first bin 20 and the number of battery devices 10 in the second bin 30 are both 30.

[0192] The arrangement mode of the battery devices 10 in the first bin 20 and the arrangement mode of the battery devices 10 in the second bin 30 can be the same or different.

[0193] In some embodiments, please refer to Figure 7 , Figure 7 which is a schematic structural diagram of the energy storage system 100 provided in some other embodiments of the present application. The multiple battery devices 10 located in the first bin 20 are arranged in 10 rows and 3 columns, and the multiple battery devices 10 located in the second bin 30 are arranged in 10 rows and 3 columns. Each row of battery devices 10 is arranged along the length direction X of the first bin 20, and each column of battery devices 10 is arranged along the height direction Z of the first bin 20.

[0194] The battery devices 10 in the first bin 20 are arranged in 10 rows and 3 columns, with a total of 30 battery devices 10. The number of battery devices 10 in the second bin 30 is equal to the number of battery devices 10 in the first bin 20, and the battery devices 10 in the second bin 30 are arranged in 10 rows and 3 columns.

[0195] In this embodiment, the arrangement of the battery devices 10 in the first bin 20 and the second bin 30 is more regular, which is beneficial to the installation and maintenance of the battery devices 10.

[0196] In some embodiments, the power conversion device 60 includes a first converter 601 disposed in the first housing 20. The multiple battery devices 10 located in the first housing 20 include multiple first battery clusters. Each first battery cluster includes multiple battery devices 10 connected in series, and the first converter 601 is electrically connected to at least one first battery cluster.

[0197] The number of battery devices 10 connected in series in each first battery cluster is equal. The first converter 601 is electrically connected to at least one first battery cluster. It may be that the first converter 601 is electrically connected to one first battery cluster; or it may be that the first converter 601 is electrically connected to multiple first battery clusters, and the number of first battery clusters electrically connected to the first converter 601 may be two, three, four, five, six, etc.

[0198] When the first battery cluster is in the charging state, the first converter 601 acts as a rectifier to convert electrical energy from external alternating current into direct current and store it in the first battery cluster. When the first battery cluster is in the discharging state, the first converter 601 acts as an inverter to convert the electrical energy stored in the first battery cluster from direct current into alternating current and deliver it to the electrical equipment.

[0199] In some embodiments, the power conversion device 60 includes a second converter 602 disposed in the second housing 30. The multiple battery devices 10 include multiple second battery clusters. Each second battery cluster includes multiple battery devices 10 connected in series, and the second converter 602 is electrically connected to at least one second battery cluster.

[0200] The number of battery devices 10 connected in series in each second battery cluster is equal.

[0201] The second converter 602 is electrically connected to at least one second battery cluster. It may be that the second converter 602 is electrically connected to one second battery cluster; or it may be that the second converter 602 is electrically connected to multiple second battery clusters, and the number of second battery clusters electrically connected to the second converter 602 may be two, three, four, five, six, etc.

[0202] When the second battery cluster is in the charging state, the second converter 602 acts as a rectifier to convert electrical energy from external alternating current into direct current and store it in the second battery cluster. When the second battery cluster is in the discharging state, the second converter 602 acts as an inverter to convert the electrical energy stored in the second battery cluster from direct current into alternating current and deliver it to the electrical equipment.

[0203] In some embodiments, the power conversion device 60 includes a first power converter 601 disposed in the first housing 20. The plurality of battery devices 10 located in the first housing 20 includes a plurality of first battery clusters. Each first battery cluster includes a plurality of battery devices 10 connected in series. The first power converter 601 is electrically connected to at least one first battery cluster. The power conversion device 60 includes a second power converter 602 disposed in the second housing 30. The plurality of battery devices 10 includes a plurality of second battery clusters. Each second battery cluster includes a plurality of battery devices 10 connected in series. The second power converter 602 is electrically connected to at least one second battery cluster.

[0204] The first power converter 601 and the second power converter 602 are independent of each other, and the first battery cluster and the second battery cluster are also independent of each other.

[0205] In this embodiment, by electrically connecting the first battery cluster through the first power converter 601, the first power converter 601 can realize the input or output of the electric energy of the first battery cluster, so that the plurality of first battery clusters can be respectively connected to the electrical equipment or the power grid, improving the performance of the first housing 20. By electrically connecting the second battery cluster through the second power converter 602, the second power converter 602 can realize the input or output of the electric energy of the second battery cluster, so that the plurality of second battery clusters can be respectively connected to the electrical equipment or the power grid, improving the performance of the second housing 30.

[0206] In some embodiments, one first power converter 601 is correspondingly arranged for each first battery cluster.

[0207] In some embodiments, one second power converter 602 is correspondingly arranged for each second battery cluster.

[0208] In some embodiments, one first power converter 601 is correspondingly arranged for each first battery cluster. One second power converter 602 is correspondingly arranged for each second battery cluster.

[0209] In this embodiment, the first battery clusters and the first power converters 601 are in one-to-one correspondence, reducing the power requirement of the first power converter 601 and improving the stability of the input or output of the electric energy of the first battery clusters. The second battery clusters and the second power converters 602 are in one-to-one correspondence, reducing the power requirement of the second power converter 602 and improving the stability of the input or output of the electric energy of the second battery clusters.

[0210] In some embodiments, please refer to Figure 8 and Figure 9 , Figure 8 is a schematic framework diagram of the control module 40, the first sub-control module 403, the second sub-control module 404 and the battery device 10 in the energy storage system 100 provided by some embodiments of the present application; Figure 9In the energy storage system 100 provided by some embodiments of the present application, it is a schematic framework diagram of the power conversion device 60, the first sub-control module 403, the second sub-control module 404, and the battery device 10. The energy storage system 100 further includes a first sub-control module 403. The first sub-control module 403 includes a first control part 4031 and a second control part 4032. Each first inverter 601 is electrically connected to at least one first battery cluster through a first control part 4031. The second control part 4032 is communicatively connected to the control module 40 and the battery monitoring unit of the battery device 10 located in the first housing 20.

[0211] The battery monitoring unit of the battery device 10 located in the first housing 20 can be used to monitor the voltage, temperature, etc. of the battery cells 1 located in the first housing 20.

[0212] The first control part 4031 is a high-voltage part, and the power transmission between the first inverter 601 and the first battery cluster is through the first control part 4031. The second control part 4032 is a low-voltage part. Communication data is transmitted between the second control part 4032 and the control module 40, which can realize the monitoring and control of the battery device 10 located in the second housing 30 by the control module 40.

[0213] The first inverter 601 and at least one first battery cluster are electrically connected through the first control part 4031. The first control part 4031 can control the on-off of the first inverter 601 and the first battery cluster to control the input, output, or output of the electrical energy of the first battery cluster. It can be that the first inverter 601 corresponds to the first battery cluster one by one, or the first inverter 601 corresponds to multiple first battery clusters. The second control part 4032 is communicatively connected to the control module 40 to transmit the control signal of the first sub-control module 403 to the control module 40, or transmit the instruction of the control module 40 to the first sub-control module 403 for execution, so as to realize the communication connection between the first sub-control module 403 and the control module 40. The first sub-control module 403 can be one, and one first sub-control module 403 is communicatively connected to the control module 40; the first sub-control module 403 can also be multiple, and multiple first sub-control modules 403 are all communicatively connected to the same control module 40.

[0214] In some embodiments, the energy storage system 100 further includes a second sub-control module 404. The second sub-control module 404 includes a third control part 4041 and a fourth control part 4042. Each second inverter 602 is electrically connected to at least one second battery cluster through a third control part 4041. The fourth control part 4042 is communicatively connected to the control module 40 and the battery monitoring unit of the battery device 10 located in the second housing 30.

[0215] The battery monitoring unit of the battery device 10 located in the second housing 30 can be used to monitor the voltage, temperature, etc. of the battery cells 1 located in the second housing 30.

[0216] The third control part 4041 is a high-voltage part, and the power transmission between the second converter 602 and the second battery cluster is through the third control part 4041. The fourth control part 4042 is a low-voltage part. Communication data is transmitted between the fourth control part 4042 and the control module 40, so that the control module 40 can monitor and control the battery device 10 located in the second housing 30.

[0217] The second converter 602 and at least one second battery cluster are electrically connected through the third control part 4041. The third control part 4041 can control the on-off of the second converter 602 and the second battery cluster to control the input, output or output of the electric energy of the second battery cluster. The second converter 602 can correspond to the second battery cluster one by one, or the second converter 602 can correspond to multiple second battery clusters. The fourth control part 4042 is communicatively connected to the control module 40 to transmit the control signal of the second sub-control module 404 to the control module 40, or transmit the instruction of the control module 40 to the second sub-control module 404 for execution, so as to realize the communication connection between the second sub-control module 404 and the control module 40. The second sub-control module 404 can be one, and one second sub-control module 404 is communicatively connected to the control module 40; the second sub-control module 404 can also be multiple, and multiple second sub-control modules 404 are all communicatively connected to the same control module 40.

[0218] In this embodiment, the first sub-control module 403 can control the on-off of the first converter 601 and the first battery cluster, reducing the control difficulty of the first battery cluster. The control module 40 can receive the signal of the first sub-control module 403 to realize the signal transmission of the first sub-control module 403. The second sub-control module 404 can control the on-off of the second converter 602 and the second battery cluster, reducing the control difficulty of the second battery cluster. The control module 40 can receive the signal of the second sub-control module 404 to realize the signal transmission of the second sub-control module 404.

[0219] In some embodiments, the energy storage system 100 includes a first battery monitoring circuit and a second battery monitoring circuit. The first battery monitoring circuit is used to collect the first data of the battery device 10 located in the first housing 20, and the second battery monitoring circuit is used to collect the second data of the battery device 10 located in the second housing 30; the control module 40 is used to determine the working state data of the energy storage system 100. The working state data of the energy storage system 100 is associated with the first data and the second data.

[0220] In some embodiments, the second control section 4032 is communicatively connected between the first battery monitoring circuit and the control module 40, and the fourth control section 4042 is communicatively connected between the second battery monitoring circuit and the control module 40.

[0221] In some embodiments, the second control section 4032 is communicatively connected between the first battery monitoring circuit and the control module 40. The second control section 4032 is configured to forward the first data. The fourth control section 4042 is communicatively connected between the second battery monitoring circuit and the control module 40. The fourth control section 4042 is configured to forward the second data.

[0222] In some embodiments, the second control section 4032 is communicatively connected between the first battery monitoring circuit and the control module 40. The second control section 4032 is configured to acquire and process the first data and transfer the processed data to the control module 40. The fourth control section 4042 is communicatively connected between the second battery monitoring circuit and the control module 40. The fourth control section 4042 is configured to acquire and process the second data and transfer the processed data to the control module 40.

[0223] In some embodiments, the first battery monitoring circuit is directly communicatively connected to the control module 40, and the second battery monitoring circuit is directly communicatively connected to the control module 40. The control module 40 processes the first data and the second data to determine the operating state data of the energy storage system 100.

[0224] In some embodiments, the control module 40 may be a module in the energy storage system 100 for monitoring and managing the battery device 10, and it may serve as a management unit for the battery device 10 in the energy storage system 100. The control module 40 may be communicatively connected to the first battery monitoring circuit and the second battery monitoring circuit. It can receive the information from the first battery monitoring circuit and the second battery monitoring circuit and process it to determine the operating state data of the energy storage system 100 by using the information from the first battery monitoring circuit and the second battery monitoring circuit. The control module 40 may monitor information such as the current, voltage, power, state of charge or temperature of the battery cell 1 of the battery device 10 to determine the operating state data of the energy storage system 100. As an example, the control module 40 includes an insulation monitoring module IMM (Insulation Monitoring Module), a main battery management unit MBMU (Master Battery Management Unit), an Ethernet ETH (EtherNet), and a fiber optic conversion module and other modules. In some embodiments, the insulation monitoring module IMM, the main battery management unit MBMU, the Ethernet ETH, and the fiber optic conversion module are all control units.

[0225] In some embodiments, the energy storage system 100 further includes a second control section 4032 and a fourth control section 4042. The second control section 4032 is communicatively connected between the first battery monitoring circuit and the control module 40, and the fourth control section 4042 is communicatively connected between the first battery monitoring circuit and the control module 40.

[0226] The fourth control section 4042 may be a module connected between the second battery monitoring circuit and the control module 40 and configured to forward information such as current, voltage, power, state of charge, or temperature of the battery cell 1 of the battery device 10 located in the second compartment 30 to the control module 40 or forward it to the control module 40 after processing.

[0227] The second control section 4032 is communicatively connected between the first battery monitoring circuit and the control module 40, enabling the second control section 4032 to forward information such as current, voltage, power, state of charge, or temperature of the battery cell 1 of the battery device 10 located in the first compartment 20 to the control module 40 or forward it to the control module 40 after processing. The fourth control section 4042 is communicatively connected between the second battery monitoring circuit and the control module 40, enabling the fourth control section 4042 to forward information such as current, voltage, power, state of charge, or temperature of the battery cell 1 of the battery device 10 located in the second compartment 30 to the control module 40 or forward it to the control module 40 after processing.

[0228] By providing the second control section 4032 between the first battery monitoring circuit and the control module 40 and the fourth control section 4042 between the second battery monitoring circuit and the control module 40, the control system of the energy storage system 100 has a three - level framework, reducing the length and complexity of the communication harness, reducing sampling errors, being beneficial to improving the reliability of the system, and also reducing the requirements for processors and communication buses, which is beneficial to reducing the overall cost of the system.

[0229] In some embodiments, the first inverter 601 and the corresponding first control section 4031 are integrated into one body.

[0230] The first inverter 601 and the first control section 4031 are integrated into one body so that the first inverter 601 is integrated with the high - voltage part of the first sub - control module 403, which helps with the electrical connection between the first inverter 601 and the first control section 4031.

[0231] In this embodiment, by integrating the first inverter 601 and the corresponding first control section 4031 into one body, the integration degree of the first control section 4031 and the first inverter 601 is improved, and the installation difficulty of the first control section 4031 and the first inverter 601 is reduced.

[0232] In some embodiments, the second converter 602 and the corresponding third control part 4041 are integrated together.

[0233] The second converter 602 and the third control part 4041 are integrated together so that the second converter 602 is integrated with the high-voltage part of the second sub-control module 404, which helps with the electrical connection between the second converter 602 and the third control part 4041.

[0234] In this embodiment, integrating the second converter 602 and the corresponding third control part 4041 together improves the integration degree of the third control part 4041 and the second converter 602, and reduces the difficulty of setting up the third control part 4041 and the second converter 602.

[0235] In some embodiments, the energy storage system 100 further includes a current conversion device 60. The current conversion device 60 can be a device for electrically connecting the first busbar terminal and the second busbar terminal to a power generation device. The electric energy generated by the power generation device can be input to the battery devices 10 located in the first housing 20 and the battery devices 10 located in the second housing 30 via the first busbar terminal and the second busbar terminal after passing through the current conversion device 60.

[0236] In some embodiments, each first battery cluster includes six battery devices 10 connected in series.

[0237] Taking the first housing 20 including 36 battery devices 10 as an example, every 6 out of the 36 battery devices 10 are connected in series to form a first battery cluster. The 6 first battery clusters are independent of each other, and each first battery cluster is connected to a first converter 601.

[0238] In some embodiments, each second battery cluster includes six battery devices 10 connected in series.

[0239] Taking the second housing 30 including 36 battery devices 10 as an example, every 6 out of the 36 battery devices 10 are connected in series to form a second battery cluster. The 6 second battery clusters are independent of each other, and each second battery cluster is connected to a second converter 602.

[0240] In some embodiments, each first battery cluster includes six battery devices 10 connected in series; each second battery cluster includes six battery devices 10 connected in series.

[0241] In the embodiment where both the first housing 20 and the second housing 30 accommodate 36 battery devices 10, the 6 first converters 601 correspond to the 6 first battery clusters in the first housing 20, and the 6 second converters 602 correspond to the 6 second battery clusters in the second housing 30.

[0242] In this embodiment, each first power conversion device 60 can achieve the input or output of electrical energy of six battery devices 10. A plurality of first inverters 601 are respectively electrically connected to a plurality of first battery clusters, reducing the risk of interference between the plurality of first battery clusters and improving the performance of the first housing 20. Each second power conversion device 60 can achieve the input or output of electrical energy of six battery devices 10. A plurality of second inverters 602 are respectively electrically connected to a plurality of second battery clusters, reducing the risk of interference between the plurality of second battery clusters and improving the performance of the second housing 30.

[0243] In some embodiments, the maximum operating voltage of the first inverter 601 is 1500V. In some embodiments, the maximum operating voltage of the second inverter 602 is 1500V.

[0244] In some embodiments, the maximum operating voltage of the first inverter 601 is 1500V; the maximum operating voltage of the second inverter 602 is 1500V.

[0245] Taking the lithium iron phosphate battery cell 1 as an example of the battery cell 1, the maximum operating voltage of the battery cell 1 is 3.65V. Each battery device 10 includes 68 series-connected battery cells 1, and the maximum operating voltage of each battery device 10 is 248.2V. Each first battery cluster includes 6 series-connected battery devices 10, and each second battery cluster includes 6 series-connected battery devices 10. Therefore, the maximum operating voltage of the first battery cluster is 1489.2V, and the maximum operating voltage of the first inverter 601 is 1500V, so that the first inverter 601 can be adapted to the first battery cluster. The maximum operating voltage of the second battery cluster is 1489.2V, and the maximum operating voltage of the second inverter 602 is 1500V, so that the second inverter 602 can be adapted to the second battery cluster.

[0246] In this embodiment, one first battery cluster is correspondingly electrically connected to one first inverter 601 with a maximum operating voltage of 1500V, so that one first battery cluster can be adapted to a working voltage of 1500V. One second battery cluster is correspondingly electrically connected to one second inverter 602 with a maximum operating voltage of 1500V, so that one second battery cluster can be adapted to a working voltage of 1500V, improving the performance of the energy storage system 100.

[0247] In some embodiments, at least a part of the thermal management module 50 is accommodated in the first housing 20. It can be that the entire thermal management module 50 is accommodated in the first housing 20; or a part of the thermal management module 50 is accommodated in the first housing 20 and the other part is accommodated in the second housing 30. In this embodiment, at least a part of the thermal management module 50 is located above the second housing 30, and the thermal management component 3 can shield the second housing 30, thereby reducing the influence of rain or exposure to the sun on the second housing 30 and improving the service performance of the energy storage system 100.

[0248] In some embodiments, please refer to Figure 10 , Figure 10 which is a schematic structural diagram of the energy storage system 100 provided in some embodiments of the present application (the thermal management module 50 is accommodated in the first sub-housing 201). The entire thermal management module 50 is accommodated in the first housing 20.

[0249] The entire thermal management module 50 is accommodated in the first housing 20. It can be that the thermal management module 50 is located on the top of the multiple battery devices 10 in the first housing 20; or the thermal management module 50 is located on one side of the multiple battery devices 10 in the first housing 20 along the length direction X; or the thermal management module 50 is located on one side of the multiple battery devices 10 in the first housing 20 along the width direction Y.

[0250] In this embodiment, the entire thermal management module 50 is located above the second housing 30, so that the thermal management module 50 can cover the second housing 30 and improve the service performance of the second housing 30. The thermal management module 50 is located in the first housing 20, so that the thermal management module 50 can have more heat dissipation space and improve the heat dissipation effect of the thermal management module 50.

[0251] In some embodiments, please continue to refer to Figure 10 . The first housing 20 includes a first sub-housing 201 and a second sub-housing 202. The first housing 20 has a first isolation layer 204. The first isolation layer 204 separates the first sub-housing 201 and the second sub-housing 202. The first sub-housing 201 is located above the second sub-housing 202. The thermal management module 50 is accommodated in the first sub-housing 201, and the battery device 10 located in the first housing 20 is accommodated in the second sub-housing 202.

[0252] The first heat insulation layer separates the first sub-housing 201 and the second sub-housing 202 to make the first sub-housing 201 and the second sub-housing 202 independent of each other. The first sub-housing 201 is located above the second sub-housing 202. The thermal management module 50 is accommodated in the first sub-housing 201 and the battery device 10 is accommodated in the second sub-housing 202. The first isolation layer 204 can insulate the thermal management module 50 and the battery device 10 located in the first housing 20. The thermal management module 50 is located above the battery device 10 so that the thermal management module 50 can block sunlight.

[0253] In this embodiment, by providing the first isolation layer 204, the first isolation layer 204 can isolate the thermal management module 50 and the battery device 10, reducing the risk of interference between the thermal management module 50 and the battery device 10. The thermal management module 50 is located above the battery device 10. On the one hand, the thermal management module 50 can shield the battery device 10 from sunlight and rain, reducing the impact of sunlight and rain on the battery device 10; on the other hand, the thermal management module 50 is located in the first sub-compartment 201, enabling the thermal management module 50 to have a larger heat dissipation area and improving the heat dissipation effect of the thermal management module 50.

[0254] In some embodiments, please continue to refer to Figure 10 . The current conversion device 60 includes a first current converter 601 disposed in the first housing 20, and the first current converter 601 is electrically connected to the battery device 10 located in the first housing 20. The first housing 20 further includes a third sub-compartment 203. The first isolation layer 204 separates the first sub-compartment 201 and the third sub-compartment 203. The first sub-compartment 201 is located above the third sub-compartment 203. The first housing 20 has a second isolation layer 205, and the second isolation layer 205 separates the second sub-compartment 202 and the third sub-compartment 203. The second sub-compartment 202 and the third sub-compartment 203 are arranged along the length direction X of the first housing 20, and the first current converter 601 is accommodated in the third sub-compartment 203.

[0255] Both the second sub-compartment 202 and the third sub-compartment 203 are located below the first sub-compartment 201. The thermal management component 3 located in the first sub-compartment 201 can cover the battery device 10 located in the second sub-compartment 202 and the first current converter 601 located in the third sub-compartment 203. The first current converter 601 and the battery device 10 are arranged along the length direction X, and the second isolation layer 205 can isolate the first current converter 601 and the battery device 10.

[0256] The first current converter 601 corresponds to the first battery cluster one by one, and a plurality of first current converters 601 are all disposed in the third sub-compartment 203.

[0257] In this embodiment, by accommodating the first current converter 601 in the third sub-compartment 203, the risk of interference between the first current converter 601 and the battery device 10 can be reduced, and the heat transferred from the first current converter 601 to the battery device 10 can also be reduced, making the use of the battery device 10 more stable.

[0258] In some embodiments, the current conversion device 60 further includes a first main control module (not shown in the figure). The first main control module corresponds to the first current converter 601 one by one. Each first main control module is integrated into a first current converter 601, and the first main control module is used to control the on-off of the electrical connection between the first battery cluster and the first current converter 601. The control module 40 is electrically connected to the first main control module to control the state of the first main control module.

[0259] In some embodiments, the dimension of the first housing 20 in the height direction Z is 2700 mm - 2900 mm.

[0260] The dimension of the first housing 20 in the height direction Z can be a point value of any one of 2700 mm, 2710 mm, 2720 mm, 2730 mm, 2740 mm, 2750 mm, 2760 mm, 2770 mm, 2780 mm, 2790 mm, 2800 mm, 2810 mm, 2820 mm, 2830 mm, 2840 mm, 2850 mm, 2860 mm, 2870 mm, 2880 mm, 2890 mm, 2900 mm or a point value between any two of them.

[0261] Exemplarily, the dimension of the first housing 20 in the height direction Z is 2800 mm.

[0262] In this embodiment, the dimension of the first housing 20 in the height direction Z is not equal to the dimension of the standard container in the height direction Z, and the height of the first housing 20 can be adjusted according to requirements, thereby improving the volume energy density of the first housing 20.

[0263] In some embodiments, please refer to Figure 11 , Figure 11 FIG. 18 is a schematic structural diagram of the energy storage system 100 provided by some embodiments of the present application (the thermal management module 50 is accommodated in the first sub-housing 201 and the third sub-housing 203). The first housing 20 includes a first sub-housing 201, a second sub-housing 202, and a third sub-housing 203. The first housing 20 has a first isolation layer 204 and a second isolation layer 205. The first sub-housing 201 is located on a side of the first isolation layer 204 away from the second sub-housing 202 and the third sub-housing 203. The second isolation layer 205 separates the second sub-housing 202 and the third sub-housing 203. The second sub-housing 202 and the third sub-housing 203 are both located below the first sub-housing 201, and the second sub-housing 202 and the third sub-housing 203 are arranged along the length direction X of the first housing 20. A part of the thermal management module 50 is accommodated in the first sub-housing 201, and another part is accommodated in the third sub-housing 203.

[0264] Inside the first housing 20, the first isolation layer 204 and the second isolation layer 205 divide the first housing 20 into a first sub-housing 201, a second sub-housing 202, and a third sub-housing 203. The first sub-housing 201 is located above the second sub-housing 202 and the third sub-housing 203, and the second sub-housing 202 and the third sub-housing 203 are arranged along the length direction X.

[0265] In this embodiment, the battery device 10 and the thermal management module 50 are separated by the first isolation layer 204 and the second isolation layer 205, which can reduce the risk of interference between the battery device 10 and the thermal management module 50. By accommodating a part of the thermal management module 50 in the first sub-compartment 201 and another part in the third sub-compartment 203, the difficulty of setting up the thermal management module 50 can be reduced.

[0266] In some embodiments, please refer to Figure 12 , Figure 12 which is a schematic structural diagram of the thermal management module 50 provided by some embodiments of the present application. The battery device 10 includes a thermal management component 3. The thermal management module 50 includes a condenser 501, a pumping device 502, a heat exchanger 503, a compressor 504, a throttling device 505, and a fan 506. The fan 506 is used to dissipate heat from the condenser 501. The pumping device 502, the heat exchanger 503, and the thermal management component 3 located in the first housing 20 are connected to form a first cooling circulation loop 507. The pumping device 502, the heat exchanger 503, and the thermal management component 3 located in the second housing 30 are connected to form a second cooling circulation loop 508. The compressor 504, the condenser 501, the throttling device 505, and the heat exchanger 503 are connected to form a refrigerant circulation loop 509. At least the condenser 501 and the fan 506 are accommodated in the first sub-compartment 201, and at least one of the pumping device 502, the compressor 504, the throttling device 505, and the heat exchanger 503 is accommodated in the third sub-compartment 203.

[0267] The pumping device 502, the heat exchanger 503, and the thermal management component 3 located in the first housing 20 are connected to form a first cooling circulation loop 507. The pumping device 502, the heat exchanger 503, and the thermal management component 3 located in the second housing 30 are connected to form a second cooling circulation loop 508. The first cooling circulation loop 507 and the second cooling circulation loop 508 are used to cool the battery cells 1. The compressor 504, the condenser 501, the throttling device 505, and the heat exchanger 503 are connected to form a refrigerant circulation loop 509. The refrigerant circulation loop 509 is used to cool the coolant passing through the heat exchanger 503.

[0268] The pumping device 502, the heat exchanger 503, the thermal management component 3, and the pumping device 502 are connected to form a cooling circulation loop.

[0269] In some embodiments, the pumping device 502, the heat exchanger 503, and the thermal management component 3 located in the first housing 20 are sequentially connected to form a first cooling circulation loop 507. The pumping device 502, the heat exchanger 503, and the thermal management component 3 located in the second housing 30 are connected to form a second cooling circulation loop 508. The compressor 504, the condenser 501, the throttling device 505, and the heat exchanger 503 are sequentially connected to form a refrigerant circulation loop 509.

[0270] It should be noted that the pumping device 502 (which can also be referred to as a water pump) is a component used to transport the coolant. The heat exchanger 503 is a component used to conduct heat exchange with the coolant flowing through it. The heat exchanger 503 can be, but is not limited to, a plate heat exchanger 503, a shell-and-tube heat exchanger 503, an air cooler, a spiral plate heat exchanger 503, a heat exchange tube bundle, etc. The coolant can be, but is not limited to, a mixture of ethylene glycol and water, etc.

[0271] Under the transportation action of the pumping device 502, the coolant can circulate in the cooling circuit and circulate through the pumping device 502, the heat exchanger 503, the thermal management component 3, and the pumping device 502. The above connections can be direct connections or indirect connections via pipelines.

[0272] By adopting the above solution, the coolant can circulate through the thermal management component 3 to directly exchange heat with the battery cell 1, thereby cooling the battery cell 1; the coolant after heat exchange with the battery cell 1 can also circulate through the heat exchanger 503 and exchange heat with the heat exchanger 503, so as to transfer the heat exchanged from the battery cell 1 to the heat exchanger 503, causing the coolant to cool down.

[0273] The compressor 504, the condenser 501, the throttling device 505, the heat exchanger 503, and the compressor 504 are connected to form a refrigerant circulation loop 509.

[0274] It should be noted that the above connections can be direct connections or indirect connections via pipelines. The compressor 504 is a component that provides power for the refrigerant circulation and can cool the refrigerant. The throttling device 505 is a component used for temperature reduction and pressure reduction. The throttling device 505 can be, but is not limited to, a throttle valve, an expansion valve, etc. The condenser 501 is a component used to conduct heat exchange with the refrigerant flowing through it. The condenser 501 can be, but is not limited to, a plate heat exchanger 503, a shell-and-tube heat exchanger 503, an air cooler, a spiral plate heat exchanger 503, a heat exchange tube bundle, etc. The refrigerant has a low boiling point and evaporation heat, can evaporate and condense at a relatively low temperature, and can achieve the refrigeration effect by absorbing and releasing heat. The refrigerant can be, but is not limited to, Freon, ammonia, carbon dioxide, R134A (1,1,1,2-tetrafluoroethane), R410A (Freon R-410A refrigerant), etc.

[0275] Among them, the heat exchanger 503 is provided in both the cooling circulation loop and the first refrigerant circulation loop 509. The interior of the heat exchanger 503 is provided with a coolant flow channel and a refrigerant flow channel. The coolant flow channel participates in forming the cooling circulation loop and is used for the coolant to flow therein. The refrigerant flow channel participates in forming the first refrigerant circulation loop 509 and is used for the refrigerant to flow therein. The coolant flow channel and the refrigerant flow channel are not connected to each other so that the coolant and the refrigerant do not mix. In the heat exchanger 503, the coolant and the refrigerant can perform heat exchange. In particular, the heat of the coolant can be exchanged to the refrigerant so that the heat exchanger 503 can cool the coolant flowing through it.

[0276] It may be that only the condenser 501 and the fan 506 are accommodated in the first sub-compartment 201, and the pumping device 502, the compressor 504, the throttling device 505 and the heat exchanger 503 are all accommodated in the third sub-compartment 203; it may also be that the condenser 501, the fan 506 and the heat exchanger 503 are accommodated in the first sub-compartment 201, and the compressor 504, the throttling device 505 and the pumping device 502 are all accommodated in the third sub-compartment 203; it may also be that the condenser 501, the fan 506, the heat exchanger 503, the pumping device 502 and the compressor 504 are accommodated in the first sub-compartment 201, and the throttling device 505 is accommodated in the third sub-compartment 203; it may also be that the condenser 501, the fan 506, the heat exchanger 503, the pumping device 502 and the throttling device 505 are accommodated in the first sub-compartment 201, and the compressor 504 is accommodated in the third sub-compartment 203; it may also be that the condenser 501, the fan 506, the heat exchanger 503, the throttling device 505 and the compressor 504 are accommodated in the first sub-compartment 201, and the pumping device 502 is accommodated in the third sub-compartment 203; it may also be that the condenser 501, the fan 506, the heat exchanger 503 and the throttling device 505 are accommodated in the first sub-compartment 201, and the compressor 504 and the pumping device 502 are accommodated in the third sub-compartment 203; it may also be that the condenser 501, the fan 506, the heat exchanger 503 and the compressor 504 are accommodated in the first sub-compartment 201, and the throttling device 505 and the pumping device 502 are accommodated in the third sub-compartment 203.

[0277] In this embodiment, by accommodating the condenser 501 and the fan 506 in the first sub-compartment 201, the condenser 501 and the fan 506 are located at the top of the first housing 20, which is beneficial to the fan 506 dissipating heat from the condenser 501 and improving the condensation performance of the condenser 501. The fan 506 is placed in the first sub-compartment 201 so that the fan 506 is located at the top of the first housing 20. A ventilation opening may be provided at the top of the first sub-compartment 201 to facilitate ventilation of the fan 506 with the external environment and realize heat exchange between the condenser 501 and the outside. It can be understood that the ventilation opening can also be provided on the side wall of the first sub-compartment 201 to increase the heat dissipation area of the thermal management module 50.

[0278] In some embodiments, the condenser 501, the pumping device 502, the heat exchanger 503, the compressor 504, the throttling device 505, and the fan 506 are all thermal management units.

[0279] In some embodiments, please continue to refer to Figure 11 . The variable current device 60 includes a first converter 601 disposed in the first housing 20, and the first converter 601 is electrically connected to the battery device 10 located in the first housing 20. The first converter 601 is accommodated in the second sub-compartment 202.

[0280] The first housing 20 includes a plurality of first battery clusters, and each first battery cluster is correspondingly electrically connected to a first converter 601. The first converter 601 and the battery device 10 accommodated in the first housing 20 are both accommodated in the second sub-compartment 202. It may be that the first converter 601 is located on top of the battery device 10 accommodated in the first housing 20; it may also be that the first converter 601 is located at the bottom of the battery device 10 accommodated in the first housing 20; it may also be that the first converter 601 and the battery device 10 accommodated in the first housing 20 are arranged along the length direction X.

[0281] In this embodiment, by arranging the first converter 601 and the battery device 10 to be both accommodated in the second sub-compartment 202, the space of the second sub-compartment 202 can be fully utilized, the space waste of the second sub-compartment 202 can be reduced, and the space utilization rate of the second sub-compartment 202 can be improved.

[0282] In some embodiments, the dimension of the first housing 20 along the height direction Z is 2600 mm - 2800 mm.

[0283] The dimension of the first housing 20 along the height direction Z can be any point value among 2600 mm, 2610 mm, 2620 mm, 2630 mm, 2640 mm, 2650 mm, 2660 mm, 2670 mm, 2680 mm, 2690 mm, 2700 mm, 2710 mm, 2720 mm, 2730 mm, 2740 mm, 2750 mm, 2760 mm, 2770 mm, 2780 mm, 2790 mm, 2800 mm or the point value between any two of them.

[0284] In this embodiment, the dimension of the first housing 20 along the height direction Z is smaller than the dimension of the standard container along the height direction Z, which can reduce the volume of the first housing 20, thereby improving the volume energy density of the first housing 20.

[0285] In some embodiments, please refer to Figure 13 , Figure 13Schematic structural diagram of the energy storage system 100 provided by some embodiments of the present application (the thermal management module 50 is housed in the third sub-compartment 203). The first housing 20 includes a second sub-compartment 202 and a third sub-compartment 203. The first housing 20 has a second isolation layer 205, and the second isolation layer 205 separates the second sub-compartment 202 and the third sub-compartment 203. The second sub-compartment 202 and the third sub-compartment 203 are arranged along the length direction X of the first housing 20. The battery device 10 located within the first housing 20 is housed in the second sub-compartment 202, and the thermal management module 50 is housed in the third sub-compartment 203.

[0286] The entire thermal management module 50 is housed in the third sub-compartment 203, and the thermal management module 50 and the battery device 10 located within the first housing 20 are arranged along the first direction.

[0287] In this embodiment, by providing the second isolation layer 205, the second isolation layer 205 can reduce the risk of interference between the battery device 10 and the thermal management module 50. By arranging the thermal management module 50 in the third sub-compartment 203, on the one hand, the thermal management module 50 is located above the second housing 30, which is beneficial to the heat dissipation of the thermal management module 50 and reduces the impact of the heat dissipation of the thermal management module 50 on the battery device 10 within the first housing 20; on the other hand, the thermal management module 50 and the battery device 10 in the first sub-compartment 201 are arranged along the length direction X, which can reduce the height of the thermal management module 50 and the maintenance difficulty of the thermal management module 50.

[0288] In some embodiments, the power conversion device 60 includes a first power converter 601 disposed within the first housing 20, and the first power converter 601 is electrically connected to the battery device 10 located within the first housing 20; the first power converter 601 is housed in the second sub-compartment 202.

[0289] The first housing 20 includes a plurality of first battery clusters, and each first battery cluster is correspondingly electrically connected to a first power converter 601. The first power converter 601 and the battery device 10 housed in the first housing 20 are both housed in the second sub-compartment 202. It may be that the first power converter 601 is located at the top of the battery device 10 housed in the first housing 20; it may also be that the first power converter 601 is located at the bottom of the battery device 10 housed in the first housing 20; it may also be that the first power converter 601 and the battery device 10 housed in the first housing 20 are arranged along the length direction X. Exemplarily, there are six first power converters 601, and the six first power converters 601 are all located at the bottom of the battery device 10 housed in the first housing 20. The six first power converters 601 are arranged in 2 rows and 3 columns. Each row of first power converters 601 is arranged along the length direction X, and each column of first power converters 601 is arranged along the width direction Y.

[0290] In this embodiment, by accommodating the first converter 601 in the second sub-compartment 202, the risk of interference between the first converter 601 and the thermal management module 50 can be reduced. Moreover, since the first converter 601 and the battery device 10 are accommodated in the second sub-compartment 202, the space of the second sub-compartment 202 can be fully utilized, improving the space utilization rate of the second sub-compartment 202.

[0291] In some embodiments, please refer to Figure 14 , Figure 14 which is a schematic structural diagram of the energy storage system 100 provided by some embodiments of the present application (the control module 40 is accommodated in the fifth sub-compartment 302). The entire control module 40 is accommodated within the second housing 30.

[0292] In this embodiment, accommodating the entire control module 40 within the second housing 30 is beneficial for the maintenance and operation of the control module 40 located within the second housing 30, reducing the maintenance difficulty of the control module 40.

[0293] In some embodiments, the second housing 30 includes a fourth sub-compartment 301 and a fifth sub-compartment 302. The second housing 30 has a third isolation layer 303 that separates the fourth sub-compartment 301 and the fifth sub-compartment 302. The fourth sub-compartment 301 and the fifth sub-compartment 302 are arranged along the length direction X of the first housing 20. The battery device 10 located in the second housing 30 is accommodated in the fourth sub-compartment 301, and the control module 40 is accommodated in the fifth sub-compartment 302.

[0294] The control module 40 and the battery device 10 located in the second housing 30 are arranged along the length direction X. The control module 40 is located at the end of the second housing 30 along the length direction X.

[0295] In this embodiment, by arranging the control module 40 to be accommodated in the fifth sub-compartment 302, the risk of interference between the battery device 10 and the control module 40 can be reduced.

[0296] In some embodiments, the energy storage system 100 further includes a power distribution module 401 and a fire control module 402. Both the control module 40 and the fire control module 402 are electrically connected to the power distribution module 401. The control module 40, the power distribution module 401, and the fire control module 402 are all accommodated in the fifth sub-compartment 302.

[0297] In this embodiment, by arranging the control module 40, the power distribution module 401, and the fire control module 402 in the fifth sub-compartment 302, the heights of the control module 40, the power distribution module 401, and the fire control module are relatively low, facilitating the maintenance and repair of the fire control module 402, the power distribution module 401, and the fire control module 402.

[0298] In some embodiments, please continue to refer to Figure 14. The power conversion device 60 includes a second converter 602 disposed in the second housing 30. The second converter 602 is electrically connected to the battery device 10 located in the second housing 30, and the second converter 602 is accommodated in the fourth sub - housing 301.

[0299] The second housing 30 includes a plurality of second battery clusters, and each second battery cluster is correspondingly electrically connected to a second converter 602. Both the second converter 602 and the battery device 10 accommodated in the second housing 30 are accommodated in the fourth sub - housing 301. It is possible that the second converter 602 is located on top of the battery device 10 accommodated in the second housing 30; it is also possible that the second converter 602 is located at the bottom of the battery device 10 accommodated in the second housing 30; it is also possible that the second converter 602 and the battery device 10 accommodated in the second housing 30 are arranged along the length direction X.

[0300] In this embodiment, the fourth sub - housing 301 accommodates the second converter 602 and the battery device 10, which can reduce the space waste of the fourth sub - housing 301 and improve the space utilization rate of the fourth sub - housing 301.

[0301] In some embodiments, please refer to Figure 15 , Figure 15 , which is an assembly drawing of the second housing 30 and the control module 40 provided by some embodiments of the present application. The fire control module 402 is located below the power distribution module 401.

[0302] The fire control module 402 and the power distribution module 401 are arranged along the height direction Z. The fire control module 402 is located at the bottom of the fifth sub - housing 302 to facilitate the maintenance and use of the fire control module 402.

[0303] It is possible that both the control module 40 and the power distribution module 401 are located above the fire control module 402; it is also possible that both the control module 40 and the fire control module 402 are located below the power distribution module 401.

[0304] In this embodiment, the fire control module 402 can be at a relatively low position, which is beneficial to the use and maintenance of the fire control module 402 and improves the reliability of the energy storage system 100.

[0305] In some embodiments, please refer to Figure 16 , Figure 16 , which is an assembly drawing of the second housing 30 and the control module 40 provided by some other embodiments of the present application. The power conversion device 60 includes a second converter 602 disposed in the second housing 30. The second converter 602 is electrically connected to the battery device 10 located in the second housing 30, and the second converter 602 is accommodated in the fifth sub - housing 302.

[0306] The second converter 602, the fire control module 402 and the second converter 602 are all located in the fifth sub - housing 302.

[0307] In this embodiment, the second converter 602 and the battery device 10 located in the fourth sub-compartment 301 are separated by a third isolation layer 303, reducing the risk of interference between the second converter 602 and the battery device 10 located in the fourth sub-compartment 301, and improving the reliability of the second compartment 30.

[0308] In some embodiments, both the fire control module 402 and the second converter 602 are located on one side of the power distribution module 401 along the width direction Y, and the fire control module 402 is located below the second converter 602.

[0309] Both the fire control module 402 and the power distribution module 401 are disposed at the bottom of the fifth sub-compartment 302, the second converter 602 is disposed above the fire control module 402, and is arranged with the power distribution module 401 along the width direction Y. It is possible that the control module 40 is located above the power distribution module 401; it is also possible that the control module 40 is located below the power distribution module 401; it is also possible that the control module 40 and the power distribution module 401 are arranged along the width direction Y.

[0310] In this embodiment, the second converter 602, the fire control module 402, and the power distribution module 401 have a relatively low height, which facilitates the maintenance of the second converter 602, the fire control module 402, and the power distribution module 401. Moreover, the fire control module 402 is located below the second converter 602, further facilitating the use and maintenance of the fire control module 402, and improving the reliability of the energy storage system 100.

[0311] In some embodiments, the dimension of the second compartment 30 along the height direction Z is 2300 mm - 2500 mm.

[0312] The dimension of the second compartment 30 along the height direction Z can be any point value among 2300 mm, 2310 mm, 2320 mm, 2330 mm, 2340 mm, 2350 mm, 2360 mm, 2370 mm, 2380 mm, 2390 mm, 2400 mm, 2410 mm, 2420 mm, 2430 mm, 2440 mm, 2450 mm, 2460 mm, 2470 mm, 2480 mm, 2490 mm, 2500 mm or any point value between any two of them.

[0313] Exemplarily, the dimension of the second compartment 30 along the height direction Z is 2400 mm.

[0314] In this embodiment, the dimension of the second compartment 30 along the height direction Z is smaller than the dimension of the standard container along the height direction Z, which can reduce the volume of the second compartment 30, thereby improving the volume energy density of the second compartment 30.

[0315] In some embodiments, please refer to Figure 17 and Figure 18 , Figure 17 which is an assembly drawing of the first bin body 20 and the second bin body 30 provided in some embodiments of the present application; Figure 18 which is a schematic structural diagram of the fixing member 70 provided in some embodiments of the present application. The energy storage system 100 further includes a fixing member 70, and the fixing member 70 is configured to connect the first bin body 20 and the second bin body 30; wherein, the fixing member 70 includes a support member 701, and the support member 701 is disposed between the first bin body 20 and the second bin body 30 along the height direction Z.

[0316] The fixing member 70 may be detachably connected to the first bin body 20 and the second bin body 30, for example, by snap connection; or the fixing member 70 may be fixedly connected to the first bin body 20 and the second bin body 30, for example, by welding.

[0317] In this embodiment, by providing the fixing member 70, the connection between the first bin body 20 and the second bin body 30 is made more stable.

[0318] In some embodiments, the fixing member 70 further includes a locking attachment 702, and the support member 701 is disposed between the first bin body 20 and the second bin body 30 along the height direction Z. The locking attachment 702 is rotatably disposed on the support member 701 about an axis extending along the height direction Z, and the locking attachment 702 is used to lock the first bin body 20 and the second bin body 30.

[0319] The locking attachment 702 may lock the first bin body 20 and the second bin body 30 by snap connection; or the locking attachment 702 may lock the first bin body 20 and the second bin body 30 by bolting. For example, the locking attachment 702 is a locking rod, and opposite-handed threads are provided on both sides of the locking rod along its length. Threaded holes are provided on both the first bin body 20 and the second bin body 30, and the locking rod rotates to engage or disengage the threads with the threaded holes to lock or unlock the first bin body 20 and the second bin body 30.

[0320] By disposing the support member 701 between the first bin body 20 and the second bin body 30 adjacent in the height direction Z, the connection between the first bin body 20 and the second bin body 30 can be realized, and the cooperation between the first bin body 20 and the second bin body 30 can also be buffered. By locking the first bin body 20 and the second bin body 30 with the locking attachment 702, the stacking of the first bin body 20 and the second bin body 30 is made more stable.

[0321] In some embodiments, the bottom of the first bin body 20 adjacent in the height direction Z has a first locking hole (not shown in the figure), and the top of the second bin body 30 has a second locking hole (not shown in the figure). The first locking hole and the second locking hole are oppositely arranged in the height direction Z. The locking member 702 further includes a first locking portion 7021, a second locking portion 7022, and a connecting portion 7023. The connecting portion 7023 is rotatably arranged on the support member 701 around an axis extending in the height direction Z. The connecting portion 7023 connects the first locking portion 7021 and the second locking portion 7022. The first locking portion 7021 and the second locking portion 7022 are respectively located on both sides of the support member 701. The connecting portion 7023 has a first position and a second position. When the connecting portion 7023 is in the first position, the first locking portion 7021 and the second locking portion 7022 can respectively insert into or withdraw from the first locking hole and the second locking hole. When the connecting portion 7023 is in the second position, the first locking portion 7021 and the second locking portion 7022 can cooperate to lock and attach the adjacent first bin body 20 and second bin body 30.

[0322] The first locking portion 7021, the second locking portion 7022, and the connecting portion 7023 can be integrally formed, or the first locking portion 7021, the second locking portion 7022, and the connecting portion 7023 can also be formed by welding.

[0323] It is possible that both the first locking hole and the second locking hole are waist-shaped holes with the same size. The length of the waist-shaped hole is greater than the width. Both the first locking portion 7021 and the second locking portion 7022 are T-shaped blocks. The length and width of the T-shaped part of the first locking portion 7021 are both smaller than the length and width of the waist-shaped hole, and the length of the T-shaped part is greater than the width of the waist-shaped hole. The sizes of the first locking portion 7021 and the second locking portion 7022 are the same. Both the first locking portion 7021 and the second locking portion 7022 can be inserted into the corresponding first locking hole and second locking hole. By rotating the connecting portion 7023, the first locking portion 7021 and the second locking portion 7022 can be respectively clamped in the first locking hole and the second locking hole to realize the locking and attachment of the adjacent first bin body 20 and second bin body 30.

[0324] By switching the connecting portion 7023 between the first position and the second position, the locking member 702 can lock or unlock the first bin body 20 and the second bin body 30, which is convenient for the disassembly and assembly of the adjacent first bin body 20 and second bin body 30.

[0325] In some embodiments, the support member 701 is provided with a through hole 7011 that penetrates the support member 701 in the height direction Z. The locking attachment 702 is rotatably inserted into the through hole 7011 around an axis extending in the height direction Z. The fixing member 70 further includes a driving arm 703. The driving arm 703 is connected to the locking attachment 702. The support member 701 is provided with a receiving cavity 7012 that communicates with the through hole 7011. The receiving cavity 7012 penetrates at least one end of the support member 701 in a direction perpendicular to the height direction Z. The driving arm 703 is swingably disposed in the receiving cavity 7012.

[0326] The driving arm 703 can be welded, clamped or bolted to the locking attachment 702.

[0327] The receiving cavity can penetrate both ends of the support member 701 in a direction perpendicular to the height direction Z, or can penetrate only one end of the support member 701 in a direction perpendicular to the height direction Z. The driving arm 703 can be entirely located in the receiving cavity 7012, and the driving arm 703 is swung by reaching into the receiving cavity 7012 with a hand or a connecting member; the driving arm 703 can also be partially located outside the receiving cavity 7012 to facilitate swinging the driving arm 703 to move.

[0328] By swinging the driving arm 703 in the receiving cavity 7012, the connection portion 7023 is switched between the first position and the second position, facilitating quick locking or unlocking between the adjacent first bin 20 and the second bin 30.

[0329] In some embodiments, the sum of the dimension of the first bin 20 in the height direction Z, the dimension of the second bin 30 in the height direction Z, and the dimension of the support member 701 in the height direction Z is greater than or equal to the dimension of a standard container in the height direction Z. In this embodiment, the energy storage system 100 can have a relatively large dimension in the height direction Z, which is beneficial to increasing the space of the first bin 20 and the second bin 30 in the height direction Z, so that more battery devices 10 can be arranged in the first bin 20 and the second bin 30 in the height direction Z, improving the volumetric energy density of the energy storage system 100.

[0330] In some embodiments, the sum of the dimension of the first bin 20 in the height direction Z and the dimension of the second bin 30 in the height direction Z is greater than or equal to the dimension of a standard container in the height direction Z.

[0331] Exemplarily, the standard container is a 20-foot standard container, the height of the standard container is 2896 mm, and the sum of the dimension of the first bin 20 in the height direction Z and the dimension of the second bin 30 in the height direction Z is greater than or equal to 2896 mm.

[0332] In this embodiment, the first housing 20 and the second housing 30 can have more space in the height direction Z, which is beneficial to arranging more battery devices 10 in the first housing 20 and the second housing 30 along the height direction Z, and improving the volumetric energy density of the energy storage system 100.

[0333] In some embodiments, the dimensions of the first housing 20 and the second housing 30 along their length direction X are both the same as the dimensions of the length direction X of a standard container, and the dimensions of the first housing 20 and the second housing 30 along their width direction Y are both the same as the dimensions of the width direction Y of a standard container.

[0334] The first housing 20 is a box structure with the same length and width as a standard container. The second housing 30 is a box structure with the same length and width as a standard container.

[0335] In this embodiment, the floor areas of the first housing 20 and the second housing 30 are the same as that of a standard container, which can reduce the transportation difficulty of the first housing 20 and the second housing 30 and lower the transportation cost.

[0336] In some embodiments, the total energy of the energy storage system 100 is 9 MWh - 11 MWh.

[0337] The areal energy density of the energy storage system 100 can be a point value of any one of 9 MWh, 9.1 MWh, 9.2 MWh, 9.3 MWh, 9.4 MWh, 9.5 MWh, 9.6 MWh, 9.7 MWh, 9.8 MWh, 9.9 MWh, 10 MWh, 10.1 MWh, 10.2 MWh, 10.3 MWh, 10.4 MWh, 10.5 MWh, 10.6 MWh, 10.7 MWh, 10.8 MWh, 10.9 MWh, 11 MWh or a point value between any two of them.

[0338] In this embodiment, the energy storage system 100 can have a high energy, improving the performance of the energy storage system 100.

[0339] In some embodiments, the total weight of the first housing 20 and the components disposed in the first housing 20 is less than or equal to 36 tons.

[0340] In some embodiments, the total weight of the second housing 30 and the components disposed in the second housing 30 is less than or equal to 36 tons.

[0341] In some embodiments, the total weight of the first housing 20 and the components disposed in the first housing 20 is less than or equal to 36 tons; the total weight of the second housing 30 and the components disposed in the second housing 30 is less than or equal to 36 tons.

[0342] The total weight of the first bin 20 and the components disposed within the first bin 20 may be 20 tons, 20.5 tons, 21 tons, 21.5 tons, 22 tons, 22.5 tons, 23 tons, 23.5 tons, 24 tons, 24.5 tons, 25 tons, 25.5 tons, 26 tons, 26.5 tons, 27 tons, 27.5 tons, 28 tons, 28.5 tons, 29 tons, 29.5 tons, 30 tons, 30.5 tons, 31 tons, 31.5 tons, 32 tons, 32.5 tons, 33 tons, 33.5 tons, 34 tons, 34.5 tons, 35 tons, 35.5 tons, 36 tons, etc.

[0343] In this embodiment, the weights of the first bin 20 and the second bin 30 are both not higher than 36 tons, facilitating the transportation of the first bin 20 and the second bin 30 and reducing the transportation cost.

[0344] In some embodiments, the standard container is a 20-foot standard container. In this way, the first bin 20 and the second bin 30 can have a relatively large size to accommodate the battery device 10, improving the practicability of the first bin 20 and the second bin 30.

[0345] Please continue to refer to Figure 10 and Figure 12, an embodiment of the present application provides an energy storage system 100, which includes a plurality of battery devices 10, a first housing 20, a second housing 30, a control module 40, a thermal management module 50, and a current conversion device 60. Thirty-six battery devices 10 are accommodated in both the first housing 20 and the second housing 30. The thirty-six battery devices 10 in the first housing 20 are arranged in 9 rows and 4 columns, and the thirty-six battery devices 10 in the second housing 30 are arranged in 9 rows and 4 columns. Every six battery devices 10 in the first housing 20 form a first battery cluster, and every six battery devices 10 in the second housing 30 form a second battery cluster. The first housing 20 and the second housing 30 are stacked along the height direction Z, the first housing 20 is located above the second housing 30, and at least one of the dimension of the first housing 20 along the height direction Z and the dimension of the second housing 30 along the height direction Z is smaller than the dimension of a standard container along the height direction Z. The dimensions of the first housing 20 and the second housing 30 along their length direction X are both consistent with the dimension of the standard container along the length direction X, and the dimensions of the first housing 20 and the second housing 30 along their width direction Y are both consistent with the dimension of the standard container along the width direction Y. The control module 40 is used to perform electrical control on the plurality of battery devices 10 in the first housing 20 and the second housing 30, and the second housing 30 accommodates the control module 40. The thermal management module 50 is used to manage the temperature of the plurality of battery devices 10 in the first housing 20 and the second housing 30, and the first housing 20 accommodates the thermal management module 50. The current conversion device 60 is electrically connected to the battery device 10. The energy storage system 100 includes a first current converter 601 and a second current converter 602. The first housing 20 accommodates the first current converter 601, and each first current converter 601 is correspondingly connected to a first battery cluster. The second housing 30 accommodates the second current converter 602, and each second current converter 602 is correspondingly connected to a second battery cluster. Wherein, the battery device 10 includes a battery cell 1, and the battery cell 1 includes a housing 11 and electrode terminals 12. Both the width and the height of the housing 11 are smaller than the length of the housing 11. The length direction X of the housing 11 is parallel to the length direction X of the first housing 20. Along the length direction X of the first housing 20, the electrode terminals 12 are arranged at one end of the housing 11. The dimension of the housing 11 along the length direction X is 465 mm - 525 mm, the dimension along the width direction Y is 49 mm - 60 mm, and the dimension along the height direction Z is 163 mm - 184 mm. Each battery device 10 includes two battery cell assemblies 1a arranged along the length direction X, and the two battery cell assemblies 1a are arranged in series. Each battery cell assembly 1a includes 34 battery cells 1 arranged in series, and the 34 battery cells 1 are arranged along the width direction Y.

[0346] In this embodiment, the battery device 10, the control module 40, the thermal management module 50, and the power conversion device 60 are all accommodated in the first housing 20 and the second housing 30. On the one hand, it can reduce the space waste of the energy storage system 100. On the other hand, it can improve the integration of the energy storage system 100 and enhance the stability of the energy storage system 100. On the other hand, when the energy storage system 100 is transported, the energy storage system 100 only occupies the space of the first housing 20 and the second housing 30, which is convenient for the transportation of the energy storage system 100. The width and height of the outer shell 11 of the battery cell 1 are both smaller than the length of the outer shell 11, and the length direction X of the outer shell 11 is parallel to the length direction X of the first housing 20, so that the length direction of the battery cells 1 in the battery device 10 is consistent with the length direction X of the first housing 20, which can reduce the space occupied by the battery cells 1 in the height direction Z. The electrode terminals 12 are arranged at at least one end of the outer shell 11, thereby further reducing the space occupied by the battery cells 1 in the height direction Z, and then reducing the space occupied by the battery device 10 in the first housing 20 or the second housing 30 in the height direction Z, reducing the space waste of the first housing 20 and the second housing 30 in the height direction Z, and improving the space utilization rate of the first housing 20 and the second housing 30 in the length direction X. Without changing the volume of the first housing 20 and the second housing 30, more battery cells 1 can be accommodated in both the first housing 20 and the second housing 30, enhancing the volumetric energy density of the energy storage system 100. The width and height of the battery cell 1 are both smaller than the length, so that when the length of a single battery cell 1 extends along the length direction X of the first housing 20, the height space occupied by a single battery cell 1 in the battery device 10 can be reduced, and the electrode terminals 12 are arranged at at least one end of the battery cell 1 along the length direction X, which can reduce the height of the battery device 10 with reference to the height of the battery cell 1, thereby reducing the space occupied by the battery device 10 in the height direction Z, improving the space utilization rate of the first housing 20 and the second housing 30 in the height direction Z, making the battery cells 1 arranged along the length direction X in the first housing 20 and the second housing 30 more compact, and thus more battery cells 1 can be accommodated in the first housing 20 and the second housing 30, improving the volumetric energy density of the energy storage system 100. Taking the battery cell 1 as a lithium iron phosphate battery cell 1 as an example, the maximum operating voltage of the battery cell 1 is 3.65V. Each battery device 10 includes 68 series-connected battery cells 1, and the maximum operating voltage of each battery device 10 is 248.2V. Each first battery cluster includes 6 series-connected battery devices 10, and each second battery cluster includes 6 series-connected battery devices 10. Therefore, the maximum operating voltage of the first battery cluster is 1489.2V, and the maximum operating voltage of the first inverter 601 is 1500V, so that the first inverter 601 can be adapted to the first battery cluster.The maximum operating voltage of the second battery cluster is 1489.2V, and the maximum operating voltage of the second converter 602 is 1500V, so that the second converter 602 can be adapted to the second battery cluster.

[0347] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0348] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An energy storage system, characterized in that, Comprising: Multiple battery devices; A first bin and a second bin, wherein multiple of the battery devices are accommodated in both the first bin and the second bin, the first bin and the second bin are stacked in the height direction, the first bin is located above the second bin, and at least one of the dimension of the first bin in the height direction and the dimension of the second bin in the height direction is less than the dimension of a standard container in the height direction; A control module for electrically controlling the multiple battery devices in the first bin and the second bin; the control module is accommodated in one of the first bin and the second bin, or a part of the control module is accommodated in the first bin and another part is accommodated in the second bin; A thermal management module for managing the temperature of the multiple battery devices in the first bin and the second bin; the thermal management module is accommodated in one of the first bin and the second bin, or a part of the thermal management module is accommodated in the first bin and another part is accommodated in the second bin; A current conversion device electrically connected to the multiple battery devices, and at least one of the first bin and the second bin accommodates the current conversion device; Wherein each battery device includes multiple battery cells, each battery cell includes a housing and electrode terminals, both the width and the height of the housing are less than the length of the housing, and the multiple battery cells are arranged in the width direction of the housing to form a battery cell assembly, and along the length direction of the housing, the electrode terminals are arranged at at least one end of the housing.

2. The energy storage system according to claim 1, wherein The battery device includes two battery cell assemblies arranged along the length direction of the first bin, and each battery cell assembly includes multiple battery cells arranged along the width direction of the first bin.

3. The energy storage system according to claim 2, wherein The electrode terminals of the battery cells in one battery cell assembly are arranged back to back with the electrode terminals of the battery cells in another battery cell assembly.

4. The energy storage system according to claim 3, wherein, The battery cell is a laminated battery cell, the battery cell includes a pressure relief mechanism and two electrode terminals with opposite polarities, the housing includes a first wall portion and a second wall portion oppositely arranged along the length direction, both electrode terminals are arranged on the first wall portion, and the pressure relief mechanism is arranged on the second wall portion.

5. The energy storage system according to claim 2, characterized in that The two battery cell assemblies are connected in series, each battery cell assembly includes 33 to 36 battery cells, and 33 to 36 battery cells are connected in series.

6. The energy storage system according to claim 5, characterized in that, Each battery cell assembly includes 34 battery cells, or each battery cell assembly includes 35 battery cells.

7. The energy storage system according to claim 1, wherein, The battery cell includes an electrode assembly, and the electrode assembly is a laminated electrode assembly.

8. The energy storage system according to claim 1, wherein The dimension of the housing along the length direction of the housing is 465 mm - 525 mm; and / or, the dimension of the housing along the width direction of the housing is 49 mm - 60 mm; and / or, the dimension of the housing along the height direction of the housing is 163 mm - 184 mm.

9. The energy storage system according to claim 1, characterized in that, The electrode terminals are arranged at at least one end of the housing along the length direction of the first bin.

10. The energy storage system according to any one of claims 1-9, characterized in that, The number of the battery devices in the first chamber is equal to the number of the battery devices in the second chamber.

11. The energy storage system according to any one of claims 1-9, characterized in that, The number of the battery devices in the first chamber is 36; and / or, the number of the battery devices in the second chamber is 36.

12. The energy storage system according to any one of claims 1-9, characterized in that, A plurality of the battery devices located in the first chamber are arranged in 9 rows and 4 columns; and / or, a plurality of the battery devices located in the second chamber are arranged in 9 rows and 4 columns, each row of the battery devices is arranged along the length direction of the first chamber, and each column of the battery devices is arranged along the height direction of the first chamber.

13. The energy storage system according to claim 12, wherein The dimension of the first chamber along the height direction and the dimension of the second chamber along the height direction are both smaller than the dimension of the standard container along the height direction.

14. The energy storage system according to any one of claims 1-9, characterized in that, The number of the battery devices in the first chamber is 30; and / or, the number of the battery devices in the second chamber is 30.

15. The energy storage system according to claim 14, wherein A plurality of the battery devices located in the first chamber are arranged in 10 rows and 3 columns; and / or, a plurality of the battery devices located in the second chamber are arranged in 10 rows and 3 columns, each row of the battery devices is arranged along the length direction of the first chamber, and each column of the battery devices is arranged along the height direction of the first chamber.

16. The energy storage system according to any one of claims 1-9, characterized in that, A plurality of the battery devices located in the first chamber are arranged in 12 rows and 3 columns, and a plurality of the battery devices located in the second chamber are arranged in 9 rows and 4 columns, each row of the battery devices is arranged along the length direction of the first chamber, and each column of the battery devices is arranged along the height direction of the first chamber.

17. The energy storage system according to claim 16, wherein, The dimension of the first chamber along the height direction is greater than the dimension of the standard container along the height direction; the dimension of the second chamber along the height direction is smaller than the dimension of the standard container along the height direction.

18. The energy storage system according to any one of claims 1-9, characterized in that, The current conversion device includes a first current converter disposed in the first chamber. A plurality of the battery devices located in the first chamber include a plurality of first battery clusters, each of the first battery clusters includes a plurality of the battery devices connected in series, and the first current converter is electrically connected to at least one of the first battery clusters; and / or, the current conversion device includes a second current converter disposed in the second chamber. A plurality of the battery devices located in the second chamber include a plurality of second battery clusters, each of the second battery clusters includes a plurality of the battery devices connected in series, and the second current converter is electrically connected to at least one of the second battery clusters.

19. The energy storage system according to claim 18, wherein, The energy storage system also includes a first sub-control module, the first sub-control module includes a first control part and a second control part, the first inverter is electrically connected to at least one of the first battery clusters through the first control part, and the second control part is communicatively connected to the control module and the battery monitoring unit of the battery device located in the first compartment; and / or, the energy storage system also includes a second sub-control module, the second sub-control module includes a third control part and a fourth control part, the second inverter is electrically connected to at least one of the second battery clusters through the third control part, and the fourth control part is communicatively connected to the control module and the battery monitoring unit of the battery device located in the second compartment.

20. The energy storage system according to claim 19, wherein The first converter is integrated with the corresponding first control part; and / or the second converter is integrated with the corresponding third control part.

21. The energy storage system according to claim 18, characterized in that, Each of the first battery clusters is correspondingly provided with one of the first converters; and / or each of the second battery clusters is correspondingly provided with one of the second converters.

22. The energy storage system according to claim 18, wherein, Each of the first battery clusters includes six of the battery devices connected in series; and / or each of the second battery clusters includes six of the battery devices connected in series.

23. The energy storage system according to claim 22, characterized in that, The maximum operating voltage of the first converter is 1500V; and / or the maximum operating voltage of the second converter is 1500V.

24. The energy storage system according to any one of claims 1-9, characterized in that, The thermal management module is entirely contained within the first housing.

25. The energy storage system according to claim 24, wherein The first compartment body includes a first sub-compartment and a second sub-compartment, the first compartment body has a first isolation layer, the first isolation layer separates the first sub-compartment and the second sub-compartment, the first sub-compartment is located above the second sub-compartment, the thermal management module is accommodated in the first sub-compartment, and the battery device located in the first compartment body is accommodated in the second sub-compartment.

26. The energy storage system according to claim 25, wherein, The current conversion device includes a first current converter disposed in the first compartment, and the first current converter is electrically connected to the battery device located in the first compartment; The first bin body also includes a third sub-bin, the first isolation layer separates the first sub-bin and the third sub-bin, the first sub-bin is located above the third sub-bin, the first bin body has a second isolation layer, the second isolation layer separates the second sub-bin and the third sub-bin, the second sub-bin and the third sub-bin are arranged along the length direction of the first bin body, and the first inverter is accommodated in the third sub-bin.

27. The energy storage system according to claim 24, wherein The dimension of the first warehouse body along the height direction is 2700mm-2900mm.

28. The energy storage system according to claim 24, wherein The first warehouse body includes a first sub-compartment, a second sub-compartment and a third sub-compartment, the first warehouse body has a first isolation layer and a second isolation layer, the first sub-compartment is located on the side of the first isolation layer away from the second sub-compartment and the third sub-compartment, the second isolation layer separates the second sub-compartment and the third sub-compartment, the second sub-compartment and the third sub-compartment are both located below the first sub-compartment, and the second sub-compartment and the third sub-compartment are arranged along the length direction of the first warehouse body, a part of the thermal management module is accommodated in the first sub-compartment, and the other part is accommodated in the third sub-compartment.

29. The energy storage system according to claim 28, wherein The battery device includes a thermal management component. The thermal management module includes a condenser, a pumping device, a heat exchanger, a compressor, a throttling device, and a fan. The fan is used to dissipate heat from the condenser. The pumping device, the heat exchanger, and the thermal management component located in the first chamber are connected to form a first coolant circulation loop. The pumping device, the heat exchanger, and the thermal management component located in the second chamber are connected to form a second coolant circulation loop. The compressor, the condenser, the throttling device, and the heat exchanger are connected to form a refrigerant circulation loop; At least the condenser and the fan are accommodated in the first sub-chamber, and at least one of the pumping device, the compressor, the throttling device, and the heat exchanger is accommodated in the third sub-chamber.

30. The energy storage system according to claim 28, wherein, The power conversion device includes a first converter disposed in the first chamber, and the first converter is electrically connected to the battery device located in the first chamber; The first converter and the battery device accommodated in the first chamber are accommodated in the second sub-chamber.

31. The energy storage system according to claim 28, wherein, The dimension of the first chamber along the height direction is 2600mm - 2800mm.

32. The energy storage system according to claim 24, wherein, The first chamber includes a second sub-chamber and a third sub-chamber. The first chamber has a second isolation layer that separates the second sub-chamber and the third sub-chamber. The second sub-chamber and the third sub-chamber are arranged along the length direction of the first chamber. The battery device located in the first chamber is accommodated in the second sub-chamber, and the thermal management module is accommodated in the third sub-chamber.

33. The energy storage system according to claim 32, characterized in that, The power conversion device includes a first converter disposed in the first chamber, and the first converter is electrically connected to the battery device located in the first chamber; The first converter is accommodated in the second sub-chamber.

34. The energy storage system according to any one of claims 1-9, characterized in that, The control module is accommodated in the second chamber.

35. The energy storage system according to claim 34, wherein The second chamber includes a fourth sub-chamber and a fifth sub-chamber. The second chamber has a third isolation layer that separates the fourth sub-chamber and the fifth sub-chamber. The fourth sub-chamber and the fifth sub-chamber are arranged along the length direction of the first chamber; The battery device located in the second chamber is accommodated in the fourth sub-chamber, and the control module is accommodated in the fifth sub-chamber.

36. The energy storage system according to claim 35, wherein The energy storage system further includes a power distribution module and a fire control module. Both the control module and the fire control module are electrically connected to the power distribution module; the power distribution module and the fire control module are both accommodated in the fifth sub-chamber.

37. The energy storage system according to claim 36, wherein, The power conversion device includes a second converter disposed in the second chamber. The second converter is electrically connected to the battery device located in the second chamber, and the second converter is accommodated in the fourth sub-chamber.

38. The energy storage system according to claim 37, wherein, The fire control module is located below the power distribution module.

39. The energy storage system according to claim 36, characterized in that, The power conversion device includes a second converter disposed in the second chamber. The second converter is electrically connected to the battery device located in the second chamber, and the second converter is accommodated in the fifth sub-chamber.

40. The energy storage system according to claim 39, wherein, Both the fire control module and the second converter are located on one side of the power distribution module along the width direction of the first chamber, and the fire control module is located below the second converter.

41. The energy storage system according to any one of claims 1-9, characterized in that, The dimension of the second housing along the height direction is 2300mm - 2500mm.

42. The energy storage system according to any one of claims 1-9, characterized in that, The energy storage system further includes a fixing member configured to connect the first housing and the second housing; wherein the fixing member includes a support member disposed between the first housing and the second housing along the height direction.

43. The energy storage system according to any one of claims 1-9, characterized in that, The sum of the dimension of the first housing along the height direction and the dimension of the second housing along the height direction is greater than or equal to the dimension of a standard container along the height direction.

44. The energy storage system according to any one of claims 1-9, characterized in that, The dimensions of the first housing and the second housing along their length directions are both consistent with the dimension of the standard container along the length direction, and the dimensions of the first housing and the second housing along their width directions are both consistent with the dimension of the standard container along the width direction.

45. The energy storage system according to any one of claims 1-9, characterized in that, Along the height direction, the total energy of the energy storage system is 9MWh - 11MWh.

46. The energy storage system according to any one of claims 1-9, characterized in that, The total weight of the first housing and the components disposed in the first housing is less than or equal to 36 tons; and / or, the total weight of the second housing and the components disposed in the second housing is less than or equal to 36 tons.

47. The energy storage system according to any one of claims 1-9, characterized in that, The standard container is a 20-foot standard container.

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