Container, energy storage apparatus, energy storage system and charging network

Abstract

Provided in the embodiments of the present disclosure are a container, an energy storage apparatus, an energy storage system and a charging network. The energy storage apparatus comprises containers, control modules and thermal management modules. There are m containers, wherein m≥2, and the m containers are arranged in a first direction of the containers. In the first direction, the size of each container is smaller than the size of a standard container. Each container comprises a container body and battery cells, wherein there are a plurality of battery cells, and the plurality of battery cells are accommodated in the container body. Each control module is arranged in the container body, and the control modules are used for performing electrical control over the plurality of battery cells of the m containers. Each thermal management module is arranged in the container body, and the thermal management modules are used for managing the temperatures of the plurality of battery cells of the m containers.

Description

Container, energy storage device, energy storage system and charging network

[0001] Cross-reference to related applications

[0002] The present disclosure is based on and claims priority to Chinese Patent Application No. 202421984591.6, filed on August 15, 2024, entitled “Container, energy storage device, energy storage system and charging network”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of batteries, and in particular to a container, an energy storage device, an energy storage system and a charging network. BACKGROUND

[0004] With the rapid development of science and technology, electric energy has become an indispensable energy in people's production and life. In order to improve the smoothness of electric energy supply and realize the normal operation of production and life, an energy storage device needs to be used. As a device for cyclically storing and releasing electric energy, the energy storage device stores electric energy in the energy storage device through charging or discharging of the energy storage device, or supplies electric energy stored in the energy storage device to an electric device. The energy storage device is widely used in industrial power supply, household power supply, temporary power supply, mobile power supply, wind power generation, solar power generation and energy storage power station fields.

[0005] In the development of energy storage devices, in addition to improving the performance of energy storage devices, how to reduce the use cost of energy storage devices is also a problem that cannot be ignored. Therefore, how to reduce the use cost of energy storage devices is a continuous improvement technical problem in energy storage technology. SUMMARY

[0006] Therefore, the embodiments of the present disclosure expect to provide a container, an energy storage device, an energy storage system and a charging network, which can reduce the use cost of the energy storage device.

[0007] To achieve the above-mentioned purpose, a first aspect of the embodiments of the present disclosure provides an energy storage device, comprising:

[0008] The container is m, m≥2, and the m containers are arranged along a first direction of the container; in the first direction, the size of the container is smaller than the size of a standard container; the container comprises a box body and a plurality of battery monomers, and the plurality of battery monomers are accommodated in the box body;

[0009] The control module is arranged in the box body, and the control module is used for electrically controlling the plurality of battery monomers of the m containers;

[0010] A thermal management module is arranged in the box body, and the thermal management module is configured to manage the temperature of the plurality of battery cells of the m containers.

[0011] The energy storage device provided by the embodiments of the present disclosure has the following advantages. On the one hand, by reducing the size of the container, the weight of the container is less than that of a standard container, so that the container can match a standard lifting device, that is, under the condition that the weight does not exceed the transportation and road limit, the container can also match the existing transportation tool of the standard container, which is beneficial to improve the transportation overweight problem, reduce the transportation cost of the container and the energy storage device using the container, and thus reduce the use cost of the energy storage device. On the other hand, the container does not exceed the size of the standard container along the first direction of the container in the process of transportation, which is beneficial to improve the convenience of the container in the process of transportation. On the other hand, by arranging the control module, the control module can control the input or output of the electric energy of the battery cell, and realize the electrical control of the battery cell. By arranging the thermal management module, the thermal management module can manage the temperature of the battery cell, and reduce the risk of temperature runaway of the battery cell. On the other hand, by arranging the control module and the thermal management module in the box body, the space in the container can be fully utilized, the integration degree is high, which is beneficial to improve the assembly efficiency and facilitate the use of customers.

[0012] In some embodiments, each container is provided with a control module; or, part of the containers is provided with a control module, and the other part of the containers is not provided with a control module.

[0013] In some embodiments, each container is provided with a thermal management module; or, part of the containers is provided with a thermal management module, and the other part of the containers is not provided with a thermal management module.

[0014] In some embodiments, the first direction is the length direction, the width direction or the height direction of the container.

[0015] In some embodiments, the first direction is the height direction of the container, the size of the container along the length direction is consistent with the size of the standard container along the length direction, the size of the container along the width direction is consistent with the size of the standard container along the width direction, and the sum of the sizes of m1 containers along the height direction in the m containers is equal to the sum of the sizes of the n standard containers along the height direction.

[0016] By setting the height dimension of the container to be smaller than that of a standard container, the container's height during transportation does not exceed that of the corresponding standard container for sea or land transport, thus improving the convenience of container transportation. The length and width dimensions of the container are identical to those of a standard container, ensuring that the horizontal area occupied during transportation is the same. The height dimension of m1 containers is equal to that of n standard containers, meaning that the space occupied by m1 containers when stacked is the same as that occupied by n standard containers. This improves the space utilization rate of container placement, fully utilizes the available vertical space during transportation, reduces space waste during container transport, and lowers the transportation costs of containers and energy storage devices using them, thereby reducing the operating costs of the energy storage devices. Container stacking also reduces the floor space required, saving space.

[0017] In some embodiments, m1 = 2, n = 1; or, m1 = 3, n = 1; or, m1 = 3, n = 2.

[0018] In some embodiments, at least part of the container has a battery compartment and a control compartment inside, which are arranged along the length of the container. Multiple battery cells are housed in the battery compartment, and a control module and / or thermal management module are housed in the control compartment. The length direction intersects with the first direction.

[0019] The control module and / or thermal management module of the control compartment can be connected to the battery compartments on both sides of the container along its length with a short line or pipe.

[0020] It improves the space utilization of container placement and reduces the land waste that traditional containers must leave more than 3 meters of maintenance passage between each container. The grid-shaped containers only need to leave normal paint touch-up and maintenance passages, which improves the user's land investment returns and energy returns per unit area.

[0021] In some embodiments, at least a portion of the enclosure includes an isolation layer that divides the control compartment into a first compartment and a second compartment. The first and second compartments share the isolation layer. The first compartment is used to house the thermal management module, and the second compartment is used to house the control module.

[0022] An isolation layer separates the thermal management module and the control module, reducing the risk of interference between the two modules and thus improving the reliability of the energy storage device.

[0023] In some embodiments, the first and second compartments are arranged along the width of the container, with the first compartment located in front of the second compartment.

[0024] The connection between the heat management module and the heat exchange pipeline is facilitated, and the number of bends of the heat exchange pipeline can be reduced, thereby reducing the flow resistance and improving the temperature control effect of the heat management module.

[0025] In some embodiments, the second compartment has a first compartment door, and the first compartment door is arranged on a side of the second compartment away from the battery compartment.

[0026] The land waste caused by the need to reserve a maintenance passage of more than 3 m between traditional containers is reduced, and the land investment income of a user and the energy income per unit area of the user are improved by reserving only a normal paint repair passage between the cross-shaped containers.

[0027] In some embodiments, the plurality of containers includes a first container and a second container, the first container is located above the second container, the heat management module is accommodated in a control compartment of the first container, and the control module is accommodated in a control compartment of the second container.

[0028] The interference of the heat management module on the control module can be reduced. In addition, the heat management module is located in the first container above, which is further conducive to heat dissipation of the heat management module, so that the heat management module can have more heat dissipation channels, and the temperature control effect of the heat management module is improved.

[0029] In some embodiments, the control compartment of the second container has a first compartment door, and the first compartment door is arranged on a side of the control compartment away from the battery compartment.

[0030] The first compartment door can be used to open or close the control compartment of the second container, and can be used for maintenance of the control module arranged in the second compartment. The land waste caused by the need to reserve a maintenance passage of more than 3 m between traditional containers is reduced, and the land investment income of a user and the energy income per unit area of the user are improved by reserving only a normal paint repair passage between the cross-shaped containers.

[0031] In some embodiments, the box body includes a first top wall and a plurality of first side walls surrounding the first top wall, and the first top wall and at least one first side wall are provided with a ventilation opening for ventilation of the heat management module.

[0032] The heat dissipation of the heat management module is facilitated, so that the heat management module can have more heat dissipation channels, and the temperature control effect of the heat management module is improved.

[0033] In some embodiments, the top of the control compartment is provided with a first wire hole, and / or the bottom of the control compartment is provided with a second wire hole.

[0034] The bottom of the control compartment is provided with a second wire passing hole, and the wire harness connected with the PCS and the EMS enters the second compartment through the first wire passing hole of the upper container, is connected with the control module, is led out of the container through the second wire passing hole of the upper container, and then can enter the second compartment through the first wire passing hole of the lower container, is connected with the control module, and is led out of the container through the second wire passing hole of the lower container.

[0035] In some embodiments, the container further comprises a sealing plate, which is detachably arranged in the first wire passing hole.

[0036] By arranging the sealing plate, the sealing property of the container is improved without affecting the wire harness passing.

[0037] In some embodiments, the container further comprises an auxiliary source wire harness, which enters the control compartment through the second wire passing hole and is electrically connected with the control module and / or the thermal management module.

[0038] By electrically connecting the auxiliary source wire harness with the control module and / or the thermal management module, the control module and / or the thermal management module can be powered separately, which is beneficial to improving the reliability of the energy storage device.

[0039] In some embodiments, the bottom of the battery compartment is provided with a floor drain, which is beneficial to discharging condensed water outside the battery compartment through the floor drain.

[0040] In some embodiments, the length direction size ratio of the control compartment to the battery compartment is 0.03-0.18, which is beneficial to improving the energy density of the energy storage device while facilitating the assembly of the control module and the thermal management module.

[0041] In some embodiments, the length direction size of the control compartment is 200mm-1000mm, which is beneficial to improving the energy density of the energy storage device while facilitating the assembly of the control module and the thermal management module.

[0042] In some embodiments, the battery compartment has a second compartment door, and the box body has an inspection door, and the second compartment door and the inspection door are located on the same side along the width direction of the container. By arranging the inspection door on the container, the main control module can be inspected along the width direction, and the main control module is more convenient to inspect.

[0043] In some embodiments, at least part of the container comprises a first connector electrically connected with the control module, each container comprises a second connector electrically connected with the battery monomer, and the first connector is used for cooperating with each second connector.

[0044] By cooperating the first connector with each second connector, the control module and the battery monomer can be quickly connected, and the connection of the control module and the battery monomer is more convenient.

[0045] In some embodiments, the container comprises a plurality of battery devices, each battery device comprising a thermal management component and a plurality of battery cells;

[0046] At least part of the container comprises a third connector, each container comprises a fourth connector, the third connector is in communication with the thermal management module, the fourth connector is in communication with the thermal management component, and the third connector is used to cooperate with each fourth connector.

[0047] The cooperation of the third connector and the fourth connector can realize the rapid communication of the thermal management component and the thermal management module, and facilitate the installation of the thermal management module.

[0048] In some embodiments, the control module comprises a master control module, a power distribution module, a general control module and a fire control module, the battery cells and the master control module are electrically connected, the master control module and the general control module are electrically connected, and the master control module, the general control module and the fire control module are electrically connected with the power distribution module.

[0049] The master control module is used to control the input and output of high-voltage electric energy of the battery cells in the container. The general control module is used to control the on-off action of the master control module in the container. The fire control module is used to control the action of the fire-fighting element when the container temperature imbalance causes a fire, and the fire-fighting element can be a fire extinguisher, etc. The fire-fighting element can be arranged in the container. The power distribution module is used to electrically connect the master control module, the general control module and the fire control module, so as to maintain the normal operation of the master control module, the general control module and the fire control module.

[0050] In some embodiments, the weight of a single battery cell is 5kg to 60kg.

[0051] The weight of the battery cell is appropriate, so that a proper amount of battery cells can be placed in the box to meet the transportation demand, and the energy density is moderate.

[0052] In some embodiments, the weight of the container is M, and M≤35 tons.

[0053] In the process of hoisting the container, the hoisting of the related hoisting device is facilitated, and the transfer work of the container is facilitated.

[0054] In some embodiments, the weight of the container is M, the total weight of the battery cells in the box is M1, and (M1 / M)×100%≥60%.

[0055] In this way, on the one hand, the weight proportion of the battery monomer in the unit volume of the container can be improved, and the electric quantity of the unit volume of the container can be improved; on the other hand, during the transportation of the container, more battery monomers that contribute to energy storage and have high production difficulty and cannot be produced at the destination are transported, while other structures can be produced at a location close to the destination without transportation or with reduced transportation, and after the container is assembled into an energy storage device, the transportation cost of the assembled energy storage device can be reduced.

[0056] In some embodiments, (M1 / M) x 100% is greater than or equal to 80%.

[0057] In this way, the transportation cost of the assembled energy storage device can be further reduced.

[0058] In some embodiments, the weight of the container is M, the container body is provided with a plurality of battery devices, the battery device includes a containing box and a plurality of battery monomers, the plurality of battery monomers are contained in the containing box, the total weight of the battery device is M2, and 70%≤(M2 / M) x 100%≤90%.

[0059] When (M2 / M) x 100% is greater than or equal to 70%, the weight proportion of the battery monomer in the unit volume of the container can be improved, and the energy density of the container can be improved; when (M2 / M) x 100% is less than or equal to 90%, the structural strength of the container can be maintained. Therefore, when 70%≤(M2 / M) x 100%≤90%, the energy density of the container and the structural strength of the container can be considered, and the practicability of the container is stronger.

[0060] In some embodiments, the volume of the container is V, the total volume of the battery monomer in the container body is V1, and (V1 / V) x 100% is greater than or equal to 30%.

[0061] On the one hand, the volume proportion of the battery monomer in the unit volume of the container can be improved, and the electric quantity of the unit volume of the container can be improved; on the other hand, during the transportation of the container, more battery monomers that contribute to energy storage and have high production difficulty and cannot be produced at the destination are transported, while other functional elements of the energy storage device such as control elements can be produced at a location close to the destination without transportation or with reduced transportation, and after the container is assembled into an energy storage device, the transportation cost of the assembled energy storage device can be reduced.

[0062] In some embodiments, (V1 / V) x 100% is greater than or equal to 50%.

[0063] The transportation cost of the assembled energy storage device can be further reduced.

[0064] In some embodiments, the volume of the container is V, a plurality of battery devices are arranged in the container body, the battery device comprises a containing box and a plurality of battery cells, the plurality of battery cells are contained in the containing box, the total volume of the battery device is V2, and 50%≤(V2 / V)×100%≤80%.

[0065] When (V2 / V)×100%≥50%, the volume ratio of the battery cells in the unit volume of the container can be increased, and the energy density of the container can be increased. When (V2 / V)×100%≤80%, the container has sufficient volume of structural members to maintain the structural strength of the container. Therefore, when 50%≤(V2 / V)×100%≤80%, the energy density of the container and the structural strength of the container can be considered, and the practicability of the container is stronger.

[0066] In some embodiments, the energy of the container is E, the size of the container body along the length direction of the container is a, the size of the container body along the width direction of the container is b, 250KW / m 2 ≤E / (a×b)≤700KW / m 2 .

[0067] When E / (a×b)≥250KW / m 2 , the container has a large energy density, and the practicability of the container is improved. When E / (a×b)≤700KW / m 2 , the risk of the container being too heavy to crush other containers can be reduced, and the transportation of the container is facilitated. Therefore, when 250KW / m 2 ≤E / (a×b)≤700KW / m 2 , the energy density of the container and the mass setting of the container are considered, the practicability of the container is improved, and the transportation of the container is facilitated.

[0068] In some embodiments, 450KW / m 2 ≤E / (a×b)≤600KW / m 2 .

[0069] The energy density of the container and the mass setting of the container can be further improved, and the transportation of the container is facilitated.

[0070] In some embodiments, along the height direction of the container, two adjacent containers are welded, clamped, locked or connected by a fixing member.

[0071] It is beneficial to reduce the risk of mutual movement of two adjacent containers after stacking is completed, and thus it is beneficial to improve the structural stability of the energy storage device.

[0072] In some embodiments, the plurality of containers includes a first container and a second container, the first container is located above the second container, the bottom of the first container is provided with a limiting pin, and the top of the second container is provided with a limiting hole, and the limiting pin is clamped with the limiting hole.

[0073] The two adjacent containers are fixed by clamping the limiting pin with the limiting hole, and the relative movement of the two adjacent containers is limited by using a simple structure.

[0074] In some embodiments, the bottom of the first container is provided with a first limiting piece, the first limiting piece is provided with a limiting slot, the top of the second container is provided with a second limiting piece, the second limiting piece is provided with a limiting hole, and the two ends of the limiting pin are clamped with the limiting slot and the limiting hole respectively.

[0075] The two adjacent containers are fixed by clamping the two ends of the limiting pin with the limiting slot and the limiting hole respectively, and the relative movement of the two adjacent containers is limited by using a simple structure.

[0076] In some embodiments, the energy storage device further includes a connecting mechanism configured to connect two adjacent containers along the height direction of the container.

[0077] The connecting mechanism includes a support arranged between the two adjacent containers along the height direction, and the sum of the sizes of the m1 containers along the height direction and the sum of the sizes of the m1-1 supports along the height direction are equal to the sum of the sizes of the n standard containers along the height direction.

[0078] The connecting mechanism connects the containers, which can make the stacking of the containers more stable. When the containers are transported, the sum of the sizes of the m1 containers along the height direction and the sum of the sizes of the supports arranged between the two adjacent containers along the height direction are equal to the sum of the heights of the n standard containers, which can efficiently utilize the transportation space occupied by the containers and save transportation costs.

[0079] In some embodiments, the heights of a part of the m containers along the height direction of the container are not equal to the heights of another part of the containers, or the sizes of the m containers along the height direction of the container are equal.

[0080] In some embodiments, the first direction is the height direction of the container, the standard container is a 20-foot standard container, and the height of the standard container is 2896mm, 2591mm or 2438mm.

[0081] The sum of the sizes of the m1 containers along the first direction is the height 2896mm, 2591mm or 2438mm of the 20-foot standard container.

[0082] The second aspect of the embodiments of the present disclosure provides a container, the container comprising a box body and a plurality of battery cells, the plurality of battery cells being accommodated in the box body; and the container being capable of accommodating at least one of a control module and a thermal management module.

[0083] The container provided by the embodiments of the present disclosure has a size along a first direction smaller than that of a standard container, which can reduce the size of the container, so that the weight of the container is smaller than that of a standard container, thereby matching a standard lifting appliance, i.e., under the condition that the weight does not exceed the transportation and road limit, the container can also match the transportation tool of an existing standard container, which is beneficial to improve the problem of transportation overweight, reduce the transportation cost of the container and the energy storage device using the container, and thus reduce the use cost of the energy storage device; on the other hand, the container does not exceed the size of a standard container along the first direction of the container in the process of transportation, which is beneficial to improve the convenience in the process of container transportation; on the other hand, the control module and the thermal management module are arranged in the box body, so that the space in the container can be fully utilized, the integration degree is high, which is beneficial to improve the assembly efficiency and facilitate the use of customers.

[0084] The third aspect of the embodiments of the present disclosure provides an energy storage system, comprising a power conversion device and the energy storage device described above, the power conversion device being used for electrically connecting a power generation device and the energy storage device.

[0085] The energy storage device of the energy storage system provided by the embodiments of the present disclosure has a size along a first direction smaller than that of a standard container, which can reduce the size of the container, so that the weight of the container is smaller than that of a standard container, thereby matching a standard lifting appliance, i.e., under the condition that the weight does not exceed the transportation and road limit, the container can also match the transportation tool of an existing standard container, which is beneficial to improve the problem of transportation overweight, reduce the transportation cost of the container and the energy storage device using the container, and thus reduce the use cost of the energy storage device; on the other hand, the container does not exceed the size of a standard container along the first direction of the container in the process of transportation, which is beneficial to improve the convenience in the process of container transportation; on the other hand, the control module can control the input or output of the electric energy of the battery cells, so as to realize the electrical control of the battery cells. The thermal management module can manage the temperature of the battery cells, so as to reduce the risk of temperature runaway of the battery cells; on the other hand, the control module and the thermal management module are arranged in the box body, so that the space in the container can be fully utilized, the integration degree is high, which is beneficial to improve the assembly efficiency and facilitate the use of customers.

[0086] A fourth aspect of the embodiments of the present disclosure provides a charging network, comprising a charging pile and the energy storage device or the energy storage system.

[0087] The energy storage device of the charging network provided by the embodiments of the present disclosure has the advantages that, by setting the size of the container along the first direction to be smaller than the size of a standard container along the first direction, on the one hand, by reducing the size of the container, the weight of the container can be made smaller than the weight of a standard container, so as to match a standard lifting appliance, that is, under the condition that the weight does not exceed the transportation and road limit, the transportation tool of the existing standard container can also be matched, which is beneficial to improving the problem of transportation overweight, reducing the transportation cost of the container and the energy storage device using the container, and thus reducing the use cost of the energy storage device; on the other hand, the container does not exceed the size of the corresponding sea or land transportation standard container along the first direction of the container in the transportation process, which is beneficial to improving the convenience in the transportation process of the container; on the other hand, by setting the control module, the control module can control the input or output of the electric energy of the battery monomer, and realize the electrical control of the battery monomer. By setting the thermal management module, the thermal management module can manage the temperature of the battery monomer, and reduce the risk of temperature out of control of the battery monomer; on the other hand, by setting the control module and the thermal management module in the box body, the space in the container can be fully utilized, the integration degree is high, which is beneficial to improving the assembly efficiency and facilitating the use of customers. BRIEF DESCRIPTION OF DRAWINGS

[0088] FIG. 1 is a structural schematic diagram of a charging network provided by an embodiment of the present disclosure;

[0089] FIG. 2 is a structural schematic diagram of an energy storage system provided by an embodiment of the present disclosure;

[0090] FIG. 3 is a structural schematic diagram of an energy storage device provided by a first embodiment of the present disclosure;

[0091] FIG. 4 is a structural schematic diagram of a container in FIG. 3;

[0092] FIG. 5 is an arrangement diagram of the energy storage device of the first embodiment of the present disclosure;

[0093] FIG. 6 is a structural schematic diagram of an energy storage device provided by a second embodiment of the present disclosure, wherein the container comprises a first container and a second container;

[0094] FIG. 7 is a structural schematic diagram of the first container in FIG. 6;

[0095] FIG. 8 is a structural schematic diagram of the second container in FIG. 6 from a first perspective;

[0096] FIG. 9 is a structural schematic diagram of the second container in FIG. 6 from a second perspective;

[0097] Fig. 10 is a layout of an energy storage device according to a second embodiment of the present disclosure;

[0098] Fig. 11 is a structural schematic diagram of an energy storage device according to a third embodiment of the present disclosure, wherein the container comprises a first container and a second container;

[0099] Fig. 12 is a structural schematic diagram of a control module according to an embodiment of the present disclosure;

[0100] Fig. 13 is a structural schematic diagram of two adjacent containers of an energy storage device according to an embodiment of the present disclosure.

[0101] Legend 1000, charging network; 2000, energy storage system; 100, energy storage device; 10, container; 1, box body; 2, battery cell; 3, first container; 31, first limiting piece; 311, limiting groove; 4, second container; 41, second limiting piece; 411, limiting hole; 42, limiting pin; 43, supporting piece; 5, sealing plate; 6, first connector; 7, second connector; 8, third connector; 9, fourth connector; 11, battery compartment; 111, second compartment door; 12, control compartment; 121, first compartment; 122, second compartment; 123, isolation layer; 124, first compartment door; 13, first top wall; 14, first side wall; 15, ventilation opening; 16, access door; 17, first wire passage hole; 18, second wire passage hole; 19, floor drain; 20, thermal management module; 30, control module; 301, main control module; 302, power distribution module; 303, master control module; 304, fire control module; 200, charging pile; 300, power conversion device; 3000, power generation device. DETAILED DESCRIPTION

[0102] All embodiments and optional embodiments of the present disclosure can be combined with each other to form new technical solutions if not specifically stated.

[0103] All technical features and optional technical features of the present disclosure can be combined with each other to form new technical solutions if not specifically stated.

[0104] With the development of clean energy, more and more equipment uses electric energy as driving energy, and power batteries that can store more electric energy and can be charged and discharged repeatedly are rapidly developed, such as lithium ion batteries. Among them, power batteries are not only applied to energy storage power supply systems of hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields.

[0105] In the embodiments of the present disclosure, the battery cell can be a secondary battery, which refers to a battery cell that can be used continuously by activating the active material through charging after the battery cell is discharged.

[0106] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present disclosure are not limited thereto.

[0107] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator disposed between the negative electrode and the positive electrode. During the charging and discharging of the battery cell, active ions (e.g., lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator disposed between the positive electrode and the negative electrode can prevent the positive and negative electrodes from short-circuiting while allowing the active ions to pass through.

[0108] In some embodiments, the positive electrode can be a positive electrode sheet, which can include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0109] As an example, the positive electrode current collector has two opposite surfaces in the thickness direction thereof, and the positive electrode active material is disposed on either one or both of the two opposite surfaces of the positive electrode current collector.

[0110] As an example, the positive electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, surface-treated metals, including but not limited to stainless steel, copper, aluminum, nickel, nickel, titanium, or silver, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0111] As an example, the positive electrode active material can include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present disclosure is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials can also be used.

[0112] In some embodiments, the negative electrode can be a negative electrode sheet, which can include a negative electrode current collector.

[0113] As an example, the negative current collector can employ a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, nickel, titanium, or silver, etc. can be employed. The composite current collector can include a high molecular material base layer and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a high molecular material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0114] As an example, the negative electrode sheet can include a negative current collector and a negative active material disposed on at least one surface of the negative current collector.

[0115] In some embodiments, the material of the positive current collector can be aluminum, and the material of the negative current collector can be copper.

[0116] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0117] In some embodiments, the separator is a separator film. The present disclosure does not have a particular limitation on the type of separator film, and any publicly known porous structure separator film having good chemical stability and mechanical stability can be selected.

[0118] As an example, the main material of the separator film can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride, and ceramic. The separator film can be a single layer film or a multi-layer composite film, and is not particularly limited. When the separator film is a multi-layer composite film, the materials of the respective layers can be the same or different, and are not particularly limited. The separator can be a separate component located between the positive and negative electrodes, or can be attached to the surface of the positive and negative electrodes. An inorganic particle coating layer, an organic particle coating layer, or an organic / inorganic composite coating layer can also be applied to the surface of the separator film.

[0119] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously functions to transport ions and separate the positive and negative electrodes.

[0120] In some embodiments, the battery cell further includes an electrolyte that functions to conduct ions between the positive and negative electrodes. The present disclosure does not have a particular limitation on the type of electrolyte, and can be selected as needed. The electrolyte can be in a liquid state, a gel state, or a solid state.

[0121] The electrode assembly can have a wound structure, a stacked structure, or a hybrid structure of the wound and stacked structures.

[0122] In some embodiments, the electrode assembly is in a wound structure. The positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0123] In some embodiments, the electrode assembly is in a stacked structure.

[0124] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets can be provided, and the plurality of positive electrode sheets and the plurality of negative electrode sheets are alternately stacked.

[0125] As an example, a plurality of positive electrode sheets can be provided, and the negative electrode sheet is folded to form a plurality of folded segments which are stacked, and one positive electrode sheet is clamped between adjacent folded segments.

[0126] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded segments which are stacked.

[0127] As an example, a plurality of separators can be provided, and each of the plurality of separators is provided between any adjacent positive electrode sheet or negative electrode sheet.

[0128] As an example, the separators can be continuously provided, and the separators are provided between any adjacent positive electrode sheet or negative electrode sheet by folding or winding.

[0129] In some embodiments, the electrode assembly can have a cylindrical shape, a flat shape, or a multi-prism shape, etc.

[0130] In some embodiments, the electrode assembly is provided with a tab, and the tab can guide current out of the electrode assembly. The tab includes a positive tab and a negative tab.

[0131] In some embodiments, the battery cell can include a housing. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc. In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing serves to protect the electrode assembly, and the housing and the electrode assembly further include a sealing bag for encapsulating the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, the housing is used to encapsulate the electrode assembly and the electrolyte, etc.

[0132] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes, and the prismatic battery cell includes a square battery cell, a blade battery cell, a multi-prismatic battery cell, such as a hexagonal prismatic battery cell, etc., without specific limitation in the present disclosure.

[0133] In some embodiments, the housing includes an end cap and a shell, and the shell is provided with an opening, and the end cap is provided on the opening. The shell can be provided with one or more openings. The end cap can also be provided with one or more openings.

[0134] In some embodiments, at least one electrode terminal is arranged on the shell, and the electrode terminal is electrically connected with the tab. The electrode terminal can be directly connected with the tab or indirectly connected with the tab through the current collecting member. The electrode terminal can be arranged on the end cover or the shell.

[0135] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, or the like.

[0136] The power station has higher and higher requirements for the area energy density of the energy storage container, so in order to improve the power, the weight of the container will also increase accordingly. The container needs to be transported from the production place to the use place by land and / or sea, and there is a weight limit for transportation by land and sea, so there is a contradiction between the improvement of the energy density and the weight of the energy storage container.

[0137] Therefore, the embodiments of the present disclosure propose a new technical solution, and the technical solution described in the embodiments of the present disclosure is applicable to the container and the energy storage device including the container.

[0138] The energy storage device can be used in an energy storage power station, a wind power system, a solar power system, a mobile power system, or a temporary power supply system, etc. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during the off-peak period of electricity consumption, and provide electrical energy for related users or electrical equipment during the peak period of electricity consumption. The energy storage system provided by the embodiments of the present disclosure can be any power system that needs to use an energy storage device.

[0139] Please refer to FIG. 1, which is a structural schematic diagram of a charging network provided by an embodiment of the present disclosure. The embodiment of the present disclosure provides a charging network 1000, which includes a charging pile 200 for charging an electrical equipment. The charging network 1000 can also include an energy storage device 100 or an energy storage system 2000, the energy storage device 100 is electrically connected with the charging pile 200, and the energy storage device 100 is used to provide electrical energy for the charging pile 200.

[0140] It should be noted that the charging pile 200 and the battery cell 2 in the energy storage device 100 are electrically connected through a cable, and the battery cell 2 can provide the electrical energy stored by itself to the charging pile 200. The charging pile 200 has one or more connectors for connecting with the electrical equipment (such as a vehicle), so as to charge the electrical equipment. The charging network 1000 applies the energy storage device 100, which can effectively improve the reliability of the charging network 1000, and also helps to improve the flexibility of the charging network 1000 when deployed.

[0141] The energy storage device 100 can be located inside the charging pile 200 (for example, a charging and storage integrated machine), or outside the charging pile 200.

[0142] In one charging network 1000, the charging pile 200 can be one, and the energy storage device 100 provides power for the charging pile 200. The charging pile 200 can also be multiple, and the energy storage device 100 provides power for multiple charging piles 200.

[0143] The energy storage device 100 can include a container 10, the container 10 includes a box body 1 and a battery monomer 2, and the battery monomer 2 is electrically connected with the charging pile 200, so as to provide power for the charging pile 200 by the battery monomer 2.

[0144] As an example, as shown in FIG. 1, the charging network 1000 includes one energy storage device 100 and two charging piles 200, and the energy storage device 100 provides power for the two charging piles 200.

[0145] Please refer to FIG. 2, which is a structural schematic diagram of an energy storage system provided by an embodiment of the present disclosure. The embodiment of the present disclosure provides an energy storage system 2000. The energy storage system 2000 includes a power conversion device 300, which can be electrically connected with a power generation device 3000 and an energy storage device 100 to convert the power provided by the power generation device 3000. The power conversion device 300 guides the power provided by the power generation device 3000 into the energy storage device 100 after power conversion for storage.

[0146] The power conversion device is used to connect between the power generation device 3000 and the energy storage device 100. The power generation device 3000 is used to generate power, and the power generation device 3000 is used to store the power generated by the power generation device 3000 into the energy storage device 100 through the power conversion device. The energy storage system 2000 applies the energy storage device 100, which can effectively improve the operation reliability of the energy storage system 2000. In specific implementation, the power generation equipment can be a solar panel, a water power generation equipment, a fire power generation equipment, etc. The specific type of the power generation equipment is not limited in the present disclosure.

[0147] As an example, as shown in FIG. 2, the energy storage system 2000 includes an energy storage device 100 and a power conversion device 300, and two power generation devices 3000 respectively transmit the generated power to the power conversion device 300, and the power conversion device 300 guides the power into the energy storage device 100 for storage.

[0148] Referring to FIGS. 3-12, some embodiments of the present disclosure provide an energy storage device, which includes m containers 10, a control module 30, and a thermal management module 20. The m containers 10 are arranged along a first direction of the containers 10. In the first direction, the size of the containers 10 is smaller than that of a standard container 10. The container 10 includes a box 1 and a plurality of battery cells 2, which are accommodated in the box 1. The control module 30 is disposed in the box 1 and is configured to electrically control the plurality of battery cells 2 of the m containers 10. The thermal management module 20 is disposed in the box 1 and is configured to manage the temperature of the plurality of battery cells 2 of the m containers 10.

[0149] The standard container 10 can be a standard container 10 in a transportation process, such as 20 feet, 30 feet, 40 feet, or 45 feet, which meets the corresponding standards, and has a corresponding size in length, width, and height.

[0150] The 20 feet container can include a length of 6058 mm with a tolerance of 0-6 mm, a width of 2438 mm with a tolerance of 0-5 mm, and a height of 2896 mm, 2591 mm, or not more than 2438 mm with a tolerance of 0-5 mm.

[0151] The 30 feet container can include a length of 9125 mm with a tolerance of 0-10 mm, a width of 2438 mm with a tolerance of 0-5 mm, and a height of 2896 mm, 2591 mm, or not more than 2438 mm with a tolerance of 0-5 mm.

[0152] The 40 feet container can include a length of 12192 mm with a tolerance of 0-10 mm, a width of 2438 mm with a tolerance of 0-5 mm, and a height of 2896 mm, 2591 mm, or not more than 2438 mm with a tolerance of 0-5 mm.

[0153] The 45 feet container can include a length of 13716 mm with a tolerance of 0-10 mm, a width of 2438 mm with a tolerance of 0-5 mm, and a height of 2591 mm or 2896 mm with a tolerance of 0-5 mm.

[0154] Optionally, for containers 10 of various sizes, sizes within ±1%, ±2%, ±3%, ±4%, or ±5% of the size can be considered as sizes within the tolerance range.

[0155] The container 10 is generally a cuboid structure, the length direction and the width direction of the container 10 are parallel to the horizontal plane, and the length direction of the container 10 is parallel to the longest side of the cuboid structure of the container 10. The height direction of the container 10 is perpendicular to the ground. Exemplarily, as shown in FIG. 3 and FIG. 6, the length direction of the container 10 is represented by X, the width direction of the container 10 is represented by Y, and the height direction of the container 10 is represented by Z.

[0156] Exemplarily, the first direction is the length direction, the width direction or the height direction of the container 10. The embodiments of the present disclosure are described by taking the height direction as the first direction.

[0157] Referring to FIG. 8 and FIG. 9, the size a of the container 10 along the length direction is the distance between the two ends of the container 10 along the length direction; the size b of the container 10 along the width direction is the distance between the two ends of the container 10 along the width direction; and the size h of the container 10 along the height direction is the distance between the two ends of the container 10 along the height direction. The above-mentioned size a, size b and size h are the maximum sizes of the outer contour of the container 10 in the corresponding direction. The box body 1 of the container 10 can include eight corner fittings and six box walls, the eight corner fittings are located at the eight corners of the cuboid structure of the container 10, the eight corner fittings respectively protrude from the box walls of the box body 1, the total span of the two corner fittings arranged along the height direction is the height of the container 10, the total span of the two corner fittings arranged along the length direction is the length of the container 10, and the total span of the two corner fittings arranged along the width direction is the width of the container 10. When calculating the size of the container 10, the pipelines and cables connected to the container 10 and located outside the container 10 are not included in the size of the container 10.

[0158] The number of the containers 10 in the energy storage device 100 can be any number greater than two, for example, the energy storage device 100 includes two containers 10, and the two containers 10 are stacked along the height direction; or for example, the energy storage device 100 includes three containers 10, and the three containers 10 are stacked along the height direction. It can be understood that when the number of the containers 10 in the energy storage device 100 is too large, the bottommost box body 1 is prone to be damaged. The sum of the heights of all the containers 10 stacked along the height direction is less than or equal to the sum of the heights of eight standard containers 10 stacked.

[0159] It can be understood that m is a positive integer.

[0160] Here, the control module 30 arranged in the box body 1 means that the control module 30 can be arranged in part of the box body 1, and the control module 30 can not be arranged in another part of the box body 1, or the control module 30 can be arranged in all the box bodies 1, or the same control module 30 can be arranged in multiple box bodies 1.

[0161] Similarly, the heat management module 20 arranged in the box body 1 means that the heat management module 20 can be arranged in part of the box body 1, and the heat management module 20 can not be arranged in another part of the box body 1, or the heat management module 20 can be arranged in the entire box body 1.

[0162] The battery monomer 2 is placed in the box body 1, and the plurality of battery monomers 2 can be directly placed in the box body 1 in series, in parallel, or in a hybrid manner; or the plurality of battery monomers 2 can be placed in the container to form a battery device and then placed in the box body 1.

[0163] Here, by arranging the container 10 along the first direction smaller than the size of a standard container 10 along the first direction, the container 10 does not exceed the height of the corresponding sea or land transportation standard container 10 along the height direction of the container 10 during transportation, which is conducive to improving the convenience of the container 10 during transportation and reducing the transportation cost of the container 10 and the energy storage device 100 using the container 10.

[0164] The energy storage device provided by the embodiment of the present disclosure has the following advantages. By arranging the container 10 along the first direction smaller than the size of a standard container 10 along the first direction, on the one hand, by reducing the size of the container 10, the weight of the container 10 can be smaller than the weight of a standard container 10, so as to match the standard lifting appliance, that is, under the condition that the weight does not exceed the transportation and road limit, the existing transportation tool of the standard container 10 can be matched, which is conducive to improving the problem of transportation overweight and reducing the transportation cost of the container 10 and the energy storage device 100 using the container 10, thereby reducing the use cost of the energy storage device 100; on the other hand, the container 10 does not exceed the size of the corresponding sea or land transportation standard container 10 along the first direction of the container 10 during transportation, which is conducive to improving the convenience of the container 10 during transportation; on the other hand, by arranging the control module 30, the control module 30 can control the input or output of the electric energy of the battery monomer 2, and realize the electrical control of the battery monomer 2. By arranging the heat management module 20, the heat management module 20 can manage the temperature of the battery monomer 2, and reduce the risk of temperature runaway of the battery monomer 2; on the other hand, by arranging the control module 30 and the heat management module 20 in the box body 1, the space in the container 10 can be fully utilized, and the integration degree is high, which is conducive to improving the assembly efficiency and facilitating the use of customers.

[0165] In addition, due to the size problem of the battery monomer 2, the edge area of the box body 1 cannot be filled with the battery monomer 2, and by arranging the control module 30 and the heat management module 20 in the box body 1, the space utilization of the box body 1 can be further improved.

[0166] In some embodiments, referring to FIG. 3 and FIG. 5, the first direction is the height direction of the container 10. The size of the container 10 along its length direction is consistent with the size of a standard container 10 along its length direction, and the size of the container 10 along its width direction is consistent with the size of a standard container 10 along its width direction. The sum of the sizes of the m1 containers 10 along the height direction in the m containers 10 is equal to the sum of the sizes of the n standard containers 10 along the height direction.

[0167] The m1 containers 10 in the m containers 10 refer to any m1 containers 10 in the m containers 10. For example, the energy storage device 100 has three containers 10, which are the first container 3, the second container 4, and the third container. If m1=2, the two containers 10 can be the first container 3 and the third container, or the first container 3 and the second container 4, or the second container 4 and the third container.

[0168] It can be that m1 is less than m, and the sum of the sizes of the part of the containers 10 along the height direction in the m containers 10 is equal to the sum of the sizes of the n standard containers 10 along the height direction. For example, m=8, m1=5, and n=3; wherein the five containers 10 can be any five containers 10 in the eight containers 10.

[0169] It can also be that m1=m, and the sum of the sizes of the m containers 10 along the height direction is equal to the sum of the sizes of the n standard containers 10 along the height direction. For example, m=2, and the sum of the heights of the two containers 10 is equal to the height of a standard container 10.

[0170] It can be understood that m, m1, and n are positive integers.

[0171] Here, the size of the container 10 along the height direction can be the same, and the size of the n standard containers 10 can be m1 times. That is, the size of the m1 containers 10 along the height direction is the size of the n standard containers 10 along the height direction. In this way, when n is 1, the m1 containers 10 can form the size of a standard container 10, which is convenient for assembling into a standard container 10 for land transportation and sea transportation; when n is an integer greater than 1, the m1 containers 10 can form the size of n standard containers 10, which can also be convenient for transportation in the size of a standard container 10. When the size of a standard container 10 is transported, the transportation cost can be greatly reduced.

[0172] Optionally, the m containers 10 can also have different sizes in the height direction, but at least the sum of the sizes of m1 containers 10 in the height direction is equal to the sum of the sizes of n standard containers 10 in the height direction. In this way, the m1 containers 10 with different sizes can be assembled into one or more standard containers 10, which greatly facilitates transportation and reduces transportation costs.

[0173] In the embodiments of the present disclosure, the sum of the sizes of m1 containers 10 in the height direction is equal to the sum of the sizes of n standard containers 10 in the height direction, which means that the sum of the sizes of m1 containers 10 in the height direction is approximately equal to the sum of the sizes of n standard containers 10 in the height direction. When the size difference between the sum of the sizes of m1 containers 10 in the height direction and the sum of the sizes of n standard containers 10 in the height direction is within the above-mentioned tolerance range, it can be considered that the sizes are approximately equal.

[0174] Optionally, the approximate difference is W, and W≤m1×35mm-30mm. For example, m1=2, and the approximate difference W can be up to 40mm. When the sum of the heights of the two containers 10 is within 40mm of the size of one standard container 10, that is, the sum of the sizes of the two containers 10 in the height direction is equal to the size of one standard container 10 in the height direction. For another example, m1=3, and the approximate difference W can be up to 75mm. When the sum of the heights of the three containers 10 is within 75mm of the size of one standard container 10, that is, the sum of the sizes of the three containers 10 in the height direction is equal to the size of one standard container 10 in the height direction; or when the sum of the heights of the three containers 10 is within 75mm of the size of two standard containers 10, that is, the sum of the sizes of the three containers 10 in the height direction is equal to the sum of the sizes of two standard containers 10 in the height direction.

[0175] Optionally, due to manufacturing errors, the sum of the sizes of m1 containers 10 can have m1 manufacturing errors W1, W1≤5mm, that is, the sum of the sizes of m1 containers 10 in the height direction is equal to the sum of the sizes of n standard containers 10 in the height direction, or the sum of the sizes of m1 containers 10 in the height direction plus m1 W1 is equal to the sum of the sizes of n standard containers 10 in the height direction. As an example, m1=2, n=1, the height h of the container 10 is 1293mm, and the height H of the corresponding standard container 10 is 2591mm, n×H-m1×h=5mm, 5mm

[0176] In some embodiments, referring to FIGS. 1-8 and 11, the energy storage device 100 further comprises a connecting mechanism (not shown in the figures) configured to connect two adjacent containers 10 along the height direction of the containers 10. The connecting mechanism comprises a support 43 arranged between the two adjacent containers 10 along the height direction. The sum of the sizes of the m1 containers 10 along the height direction and the sum of the sizes of the m1-1 supports 43 along the height direction is equal to the sum of the sizes of the n standard containers 10 along the height direction.

[0177] Optionally, the containers 10 are connected and fixed by the supports 43 along the height direction, and the sizes of the m1 containers 10 to form the n standard containers 10 further include the height of the supports 43. That is, when the supports 43 are arranged, the size of some of the m1 containers 10 along the height direction can be the sum of the height of the container itself and the height of the support 43 connected thereto. Because the supports 43 connecting the containers 10 along the height direction also occupy the height of the containers 10 to some extent.

[0178] For example, when the m1 containers 10 are connected and fixed by the supports 43, the sum of the sizes of the m1 containers 10 along the height direction and the sum of the sizes of the m1-1 supports 43 along the height direction is equal to the sum of the sizes of the n standard containers 10 along the height direction. Optionally, the number of supports 43 between the m1 containers 10 can be less than m1-1, and when the containers 10 are assembled to form the standard containers 10, the sizes of the m1 containers 10 and the actual sizes of the supports 43 are included.

[0179] The containers 10 are connected by the connecting mechanism, which can make the stacking of the containers 10 more stable. When the containers 10 are transported, the sum of the sizes of the m1 containers 10 along the height direction and the sum of the sizes of the supports 43 arranged between the two adjacent containers 10 among the m1 containers 10 along the height direction is equal to the sum of the heights of the n standard containers 10, which can efficiently utilize the transportation space occupied by the containers 10 and save transportation costs.

[0180] For example, the size of the support 43 is W2, and W2≤30mm. For example, m1=3, n=2, the height h of the container 10 is 845mm, the height H of the corresponding standard container 10 is 2591mm, n×H-m1×h=56mm, 56mm W=m1×W1+(m1-1)×W2.

[0181] Therefore, when the support 43 is used during transportation, the sum of the sizes of the m1 containers 10 along the height direction is equal to the sum of the sizes of the n standard containers 10 along the height direction, and it should be understood that the height of the support 43 used is included. That is, the sum of the sizes of the m1 containers 10 along the height direction is equal to the sum of the sizes of the n standard containers 10 along the height direction minus the sum of the heights of the supports 43 used. Such a case also belongs to the case of the present embodiment.

[0182] In this embodiment, by setting the size of the container 10 along the height direction to be smaller than the size of a standard container 10 along the height direction, the container 10 does not exceed the height of the standard container 10 along the height direction during transportation, which is beneficial to improve the convenience of the container 10 during transportation. The size of the container 10 along the length direction and the size of the container 10 along the width direction are consistent with the standard container 10, so that the horizontal area occupied by the container 10 during transportation is consistent with the standard container 10, and the size of the m1 containers 10 along the height direction is the size of the n standard containers 10 along the height direction, which can make the space occupied by the m1 containers 10 during stacking the same as the space occupied by the n standard containers 10, improve the utilization rate of the space for placing the container 10, and be beneficial to fully utilize the space available along the height direction during transportation, reduce the space waste during transportation of the container 10, and reduce the transportation cost of the container 10 and the energy storage device 100 using the container 10, thereby reducing the use cost of the energy storage device 100. The stacking of the container 10 can also reduce the occupied area and save space.

[0183] In some embodiments, referring to FIGS. 11 and 12, the control module 30 includes a main control module 301, a power distribution module 302, a master control module 303, and a fire control module 304. The battery cell 2 and the main control module 301 are electrically connected. The main control module 301 and the master control module 303 are electrically connected. The main control module 301, the master control module 303, and the fire control module 304 are electrically connected to the power distribution module 302.

[0184] The master control module 301 is configured to control the input and output of high-voltage electric energy of the battery monomer 2 in the container 10. The general control module 303 is configured to control the on-off action of the master control module 301 in the container 10. The fire control module 304 is configured to control the action of the fire-fighting element when the temperature imbalance of the container 10 causes a fire, and the fire-fighting element can be a fire extinguisher or the like. The fire-fighting element can be arranged in the container 10. The power distribution module 302 is configured to electrically connect the master control module 301, the general control module 303, and the fire control module 304, so as to maintain the normal operation of the master control module 301, the general control module 303, and the fire control module 304.

[0185] Exemplarily, referring to FIGS. 3-5, each container 10 is provided with a control module 30, that is, the control module 30 corresponds to the container 10 one by one, and one control module 30 corresponds to control the input and output of electric energy of the battery monomer 2 in one container 10, so as to facilitate the electrical control of the battery monomer 2 by the control module 30.

[0186] Exemplarily, referring to FIGS. 6-10, some containers 10 are provided with control modules 30, and some containers 10 are not provided with control modules 30, that is, one control module 30 corresponds to control the input or output of electric energy of the battery monomer 2 in multiple containers 10. For example, when the number of containers 10 is two, one of the containers 10 is provided with a control module 30, and the other container 10 is not provided with a control module 30, and the control module 30 corresponds to control the input or output of electric energy of the battery monomer 2 in the two containers 10.

[0187] Of course, one container 10 can have multiple control modules 30, and one container 10 can have multiple battery monomers 2, multiple battery monomers 2 are connected in series to form a battery cluster, multiple battery clusters are connected in parallel, and one control module 30 can correspond to control one or more battery clusters.

[0188] The thermal management module 20 includes a heat exchange unit, for example, a water cooling unit, and the thermal management module 20 can exchange heat with the battery monomer 2 through a heat exchange pipeline (for example, a water cooling pipeline), so as to realize the temperature management of the battery monomer 2 and reduce the risk of temperature runaway of the battery monomer 2.

[0189] Exemplarily, referring to FIGS. 3-5, each container 10 is provided with a thermal management module 20, that is, the thermal management module 20 corresponds to the container 10 one by one, and one thermal management module 20 corresponds to manage the temperature of the battery monomer 2 in one container 10.

[0190] Exemplarily, please refer to FIGS. 6-10, part of the containers 10 is provided with the thermal management module 20, and another part of the containers 10 is not provided with the thermal management module 20, that is, one thermal management module 20 corresponds to manage the temperature of the battery monomers 2 in multiple containers 10. For example, when the number of containers 10 is two, one of the containers 10 is provided with the thermal management module 20, and the other container 10 is not provided with the thermal management module 20. The thermal management module 20 can exchange heat with the battery monomers 2 in the two containers 10 through the heat exchange pipeline (for example, a water cooling pipeline), that is, the thermal management module 20 can correspond to manage the temperature of the battery monomers 2 in the two containers 10.

[0191] Please refer to FIGS. 3-10, the embodiment of the present disclosure provides a container 10, which includes a box body 1 and battery monomers 2. The battery monomers 2 are multiple, and the multiple battery monomers 2 are contained in the box body 1. And the container 10 can be used to contain at least one of the control module 30 and the thermal management module 20.

[0192] In some embodiments, m1 = 2, n = 1.

[0193] The number of containers 10 in the energy storage device 100 can be more than two, for example, the number of containers 10 in the energy storage device 100 is 3, 5, or 8. There can also be only two containers 10 in the energy storage device 100.

[0194] By setting the height of the two containers 10 as the height of one standard container 10, when transporting multiple containers 10 in the energy storage device 100, the adjacent two containers 10 can be stacked in the height direction, so that the two containers 10 can just occupy the space required by one standard container 10, improving the space utilization rate of the container 10 placement, which is conducive to reducing the transportation cost of the container 10.

[0195] In some embodiments, m1 = 3, n = 1.

[0196] By setting the height of the three containers 10 as the height of one standard container 10, when transporting multiple containers 10 in the energy storage device 100, the adjacent three containers 10 can be stacked in the height direction, so that the three containers 10 can just occupy the space required by one standard container 10, improving the space utilization rate of the container 10 placement, which is conducive to reducing the transportation cost of the container 10.

[0197] In some embodiments, m1 = 3, n = 2.

[0198] By setting the height of the three containers 10 as the height of two standard containers 10, when transporting the plurality of containers 10 in the energy storage device 100, the adjacent three containers 10 can be stacked in the height direction, so that the three containers 10 can just occupy the space required by two standard containers 10, thereby improving the space utilization rate of the containers 10 and reducing the transportation cost of the containers 10.

[0199] In some embodiments, referring to FIGS. 3-10, at least part of the box 1 has a battery compartment 11 and a control compartment 12. The battery compartment 11 and the control compartment 12 are arranged along the length direction of the container 10. A plurality of battery cells 2 are contained in the battery compartment 11, and a control module 30 and / or a thermal management module 20 are contained in the control compartment 12. The length direction intersects the first direction.

[0200] Exemplarily, the first direction can be the height direction, and the length direction intersects the first direction.

[0201] There are various ways to arrange the battery compartment 11 and the control compartment 12 along the length direction of the container 10.

[0202] Exemplarily, the battery compartment 11, the control compartment 12, and the battery compartment 11 are arranged in sequence along the length direction of the container 10, that is, the control compartment 12 is provided with the battery compartment 11 on both sides along the length direction of the container 10, that is, the control compartment 12 can be arranged between the two battery compartments 11, so that the control module 30 and / or the thermal management module 20 of the control compartment 12 can be connected to the battery compartments 11 on both sides along the length direction of the container 10 with shorter lines or pipelines.

[0203] Exemplarily, a partition (not shown in the figure) is arranged between the battery compartment 11 and the control compartment 12, which is beneficial to improve the structural strength of the box 1 and also beneficial to improve the sealing performance and thermal insulation performance of the battery compartment 11.

[0204] The heat exchange pipeline and the connection wire harness are sealed through the partition. The thermal management module 20 in the control compartment 12 can exchange heat with the battery cells 2 in the battery compartment 11 through the heat exchange pipeline (for example, a water cooling pipeline), and the control module 30 in the control compartment 12 can electrically control the battery cells 2 in the battery compartment 11 through the connection wire harness.

[0205] Exemplarily, referring to FIG. 3 to FIG. 10, the battery compartment 11 and the control compartment 12 are arranged along the length direction of the container 10, that is, the control compartment 12 can be arranged at the end of the container 10, so that the space utilization of the container 10 is improved, and the control components arranged in the control compartment 12 are convenient to maintain from the end of the container 10. In addition, if the containers 10 are arranged symmetrically, the containers 10 can be arranged in a cross pattern (as shown in FIG. 5 and FIG. 10), so that the space utilization of the arranged containers 10 is improved, the land waste caused by the maintenance passage of more than 3m reserved between the traditional containers 10 is reduced, and the normal paint repair passage is reserved between the containers 10 arranged in the cross pattern, so that the land investment income of the user is improved, and the energy income per unit area of the user is improved.

[0206] Here, the control module 30 and / or the thermal management module 20 accommodated in the control compartment 12 means that the control module 30 can be accommodated in the control compartment 12. The thermal management module 20 can also be accommodated in the control compartment 12, and the control module 30 and the thermal management module 20 can also be accommodated in the control compartment 12.

[0207] In this embodiment, by arranging the battery compartment 11 and the control compartment 12 along the length direction of the container 10, the control module 30 and / or the thermal management module 20 of the control compartment 12 can be connected to the battery compartment 11 on both sides of the length direction of the container 10 through a shorter line or pipeline; the space utilization of the container 10 is improved, and the control components arranged in the control compartment 12 are convenient to maintain from the end of the container 10. In addition, if the containers 10 are arranged symmetrically, the containers 10 can be arranged in a cross pattern, so that the space utilization of the arranged containers 10 is improved, the land waste caused by the maintenance passage of more than 3m reserved between the traditional containers 10 is reduced, and the normal paint repair passage is reserved between the containers 10 arranged in the cross pattern, so that the land investment income of the user is improved, and the energy income per unit area of the user is improved.

[0208] In some embodiments, referring to FIG. 3 to FIG. 7, the box body 1 includes a first top wall 13 and a plurality of first side walls 14 surrounding the first top wall 13, and the first top wall 13 and at least one first side wall 14 are provided with a ventilation opening 15 for ventilation of the thermal management module 20.

[0209] The first top wall 13 can be entirely opened to form a ventilation opening 15. The first top wall 13 can also be partially opened to form a ventilation opening 15; for example, one side of the first top wall 13 along the length direction is provided with an opening, so that part of the first top wall 13 forms a ventilation opening 15.

[0210] All the first side walls 14 can be provided with the ventilation openings 15, or only a part of the first side walls 14 can be provided with the ventilation openings 15.

[0211] In this embodiment, the ventilation openings 15 are located at the first top and the first side walls 14 of the bin body, which is beneficial to heat dissipation of the thermal management module 20, so that the thermal management module 20 can have more heat dissipation channels, and the temperature control effect of the thermal management module 20 is improved.

[0212] In some embodiments, referring to FIGS. 3-5, at least part of the bin 1 comprises an isolation layer 123, the isolation layer 123 separates the control bin 12 into a first bin 121 and a second bin 122, and the first bin 121 and the second bin 122 share the isolation layer 123. The first bin 121 is used to accommodate the thermal management module 20, and the second bin 122 is used to accommodate the control module 30.

[0213] For example, the first bin 121 and the second bin 122 can be arranged in a stacked manner along the height direction, and the first bin 121 is located above the second bin 122. The first top wall 13 is located at the top of the first bin 121. The first bin 121 and the second bin 122 can share the first side wall 14, and the first side wall 14 located at the first bin 121 is provided with the ventilation opening 15.

[0214] The first bin 121 is located at the top of the control bin 12, which can make the thermal management module 20 located at the top of the control bin 12, and there is no shelter above the thermal management module 20, which is beneficial to heat dissipation of the thermal management module 20. The first bin 121 is separated from the second bin 122 by the isolation layer 123, which can separate the thermal management module 20 and the control module 30, and can reduce the interference of the thermal management module 20 on the control module 30, that is, can reduce the electromagnetic interference of the high-voltage line on the low-voltage line, and can also reduce the influence of external rainfall or sunlight on the control module 30.

[0215] Here, the isolation layer 123 can be a metal plate.

[0216] In this embodiment, the isolation layer 123 separates the thermal management module 20 and the control module 30, reduces the risk of interference between the thermal management module 20 and the control module 30, and thus improves the reliability of the energy storage device 100.

[0217] In some embodiments, referring to FIGS. 3-5, the first bin 121 and the second bin 122 are arranged along the width direction of the container 10, and the first bin 121 is arranged at the front side of the second bin 122.

[0218] The first bin 121 and the second bin 122 can share the first side wall 14 and the first top wall 13, and the first side wall 14 and the first top wall 13 located at the first bin 121 are provided with the ventilation opening 15.

[0219] The first compartment 121 is located in front of the second compartment 122. There are no obstructions above or on the sides of the thermal management module 20, which is conducive to the heat dissipation of the thermal management module 20.

[0220] In this embodiment, the first compartment 121 is located in front of the second compartment 122, that is, the first compartment 121 is located on the side of the housing 1 near the door of the battery compartment 11, and the inlet and outlet of the heat exchange pipeline are also located on the side of the housing 1 near the door of the battery compartment 11. This facilitates the connection between the thermal management module 20 and the heat exchange pipeline, and can also reduce the number of bends in the heat exchange pipeline, thereby reducing flow resistance and improving the temperature control effect of the thermal management module 20.

[0221] In some embodiments, please refer to Figures 3 and 4, the second compartment 122 has a first compartment door 124, which is located on the side of the second compartment 122 away from the battery compartment 11.

[0222] The first compartment door 124 is located on the side of the second compartment 122 away from the battery compartment 11, that is, the first compartment door 124 can be part of the first side wall 14.

[0223] In this embodiment, the first door 124 can be used to open or close the second compartment 122 and to inspect the control module 30 located in the second compartment 122. This reduces the land waste that traditional containers 10 must have reserved a maintenance passage of more than 3m between each container 10. The grid-shaped containers 10 only need to reserve a normal paint touch-up maintenance passage, which can improve the user's land investment returns and increase the user's energy returns per unit area.

[0224] In some embodiments, as shown in Figures 6 to 10, the plurality of containers 10 include a first container 3 and a second container 4, the first container 3 being located above the second container 4, the thermal management module 20 being housed in the control compartment 12 of the first container 3, and the control module 30 being housed in the control compartment 12 of the second container 4.

[0225] The first container 3 and the second container 4 are stacked along the height direction, with the first container 3 located above the second container 4.

[0226] The first container 3 is located above the second container 4, which allows the thermal management module 20 to be positioned on top of the energy storage device 100. The absence of obstructions above the thermal management module 20 further facilitates its heat dissipation. Furthermore, it further separates the thermal management module 20 from the control module 30, reducing interference from the thermal management module 20 to the control module 30.

[0227] In this embodiment, by housing the thermal management module 20 in the control compartment 12 of the upper first container 3 and the control module 30 in the control compartment 12 of the lower second container 4, the interference of the thermal management module 20 on the control module 30 can be reduced. Furthermore, the location of the thermal management module 20 in the upper first container 3 further facilitates heat dissipation for the thermal management module 20, allowing it to have more heat dissipation channels and improving its temperature control performance.

[0228] In some embodiments, please refer to Figures 6 to 10, the control compartment 12 of the second container 4 has a first door 124, which is located on the side of the control compartment 12 away from the battery compartment 11.

[0229] The first door 124 is located on the side of the control compartment 12 of the second container 4 away from the battery compartment 11, that is, the first door 124 can be part of the first side wall 14.

[0230] In this embodiment, the first door 124 can be used to open or close the control compartment 12 of the second container 4, and can be used to inspect the control module 30 set in the second compartment 122. This reduces the land waste that traditional containers 10 must reserve more than 3m of maintenance passage between each container 10. The grid-shaped containers 10 only need to reserve normal paint touch-up maintenance passage, which can improve the user's land investment returns and increase the user's energy returns per unit area.

[0231] In some embodiments, please refer to FIG8, a first wire hole 17 is provided on the top of the control compartment 12.

[0232] For example, please refer to Figure 9. The bottom of the control compartment 12 is provided with a second wire hole 18.

[0233] To facilitate rapid on-site installation for customers, the control module 30 and thermal management module 20 are integrated inside the container 10. After the container 10 is stacked on-site, it can be connected to the PCS and EMS, which helps reduce the workload of on-site assembly, improves assembly efficiency, and makes it convenient for customers to use.

[0234] A PCS (Power Conversion System) controls the charging and discharging process of a battery, performing AC-DC conversion and directly supplying power to AC loads in the absence of a power grid. A PCS consists of a DC / AC bidirectional converter, a control unit, etc. The PCS controller receives control commands from the backend via communication and controls the converter to charge or discharge the battery according to the sign and magnitude of the power command, thereby regulating the active and reactive power of the power grid. The PCS controller communicates with the BMS (Battery Management System) via a CAN interface to obtain battery status information, enabling protective charging and discharging of the battery.

[0235] EMS (Energy Management System) is a collection of software and hardware for monitoring, controlling, analyzing and optimizing energy systems. It realizes efficient management and optimal allocation of energy by real-time monitoring and intelligent control of various links of energy production, distribution and consumption.

[0236] In this embodiment, the bottom of the control compartment 12 is provided with a second wire passing hole 18. The wire harness connected with the PCS and the EMS enters the second compartment 122 through the first wire passing hole 17 of the upper container 10, is connected with the control module 30, is led out of the container 10 through the second wire passing hole 18 of the upper container 10, then enters the second compartment 122 through the first wire passing hole 17 of the lower container 10, is connected with the control module 30 again, and is led out of the container 10 through the second wire passing hole 18 of the lower container 10.

[0237] In some embodiments, referring to FIGS. 1-8, the container 10 further comprises a sealing plate 5 (not shown in the figure) which is detachably arranged at the first wire passing hole 17.

[0238] The sealing plate 5 is detachably arranged at the first wire passing hole 17 and is used for selectively opening or closing the first wire passing hole 17.

[0239] The first wire passing hole 17 of the container 10 is provided with a detachable sealing plate 5 which is sealingly connected between the container 10. When the container 10 is placed at the bottom, the sealing plate 5 of the upper layer needs to be removed in advance, and when the container 10 is placed at the top, the sealing plate 5 does not need to be removed.

[0240] In this embodiment, by arranging the sealing plate 5, the sealing property of the container 10 is improved without affecting the wire harness passing.

[0241] In some embodiments, referring to FIGS. 6-10, the container 10 further comprises an auxiliary source wire harness which enters the control compartment 12 through the second wire passing hole 18 and is electrically connected with the control module 30 and / or the thermal management module 20.

[0242] Here, the electrical connection between the auxiliary source wire harness and the control module 30 and / or the thermal management module 20 means that the auxiliary source wire harness can be electrically connected with the control module 30, can be electrically connected with the thermal management module 20, or can be electrically connected with both the control module 30 and the thermal management module 20.

[0243] In this embodiment, by electrically connecting the auxiliary source wire harness with the control module 30 and / or the thermal management module 20, the control module 30 and / or the thermal management module 20 can be powered separately, which is beneficial to improving the reliability of the energy storage device 100.

[0244] In some embodiments, referring to FIG. 9, the bottom of the battery compartment 11 is provided with a floor drain 19.

[0245] In this embodiment, by providing the bottom of the battery compartment 11 with a floor drain 19, it is beneficial to drain the condensed water out of the battery compartment 11 through the floor drain 19.

[0246] In some embodiments, the length ratio of the control compartment 12 to the battery compartment 11 is 0.03-0.18.

[0247] For example, 0.03, 0.05, 0.06, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18.

[0248] Here, the control compartment 12 and the battery compartment 11 are arranged along the length direction of the container 10, and thus, the smaller the length ratio of the control compartment 12 to the battery compartment 11, the larger the size of the battery compartment 11, which is beneficial to improve the energy density of the energy storage device 100; the larger the length ratio of the control compartment 12 to the battery compartment 11, the larger the size of the control compartment 12, which is convenient for assembling the control module 30 and the thermal management module 20.

[0249] In this embodiment, by setting the length ratio of the control compartment 12 to the battery compartment 11 to 0.03-0.18, it is beneficial to improve the energy density of the energy storage device 100 while facilitating the assembly of the control module 30 and the thermal management module 20.

[0250] In some embodiments, the length of the control compartment 12 is 200mm-1000mm.

[0251] For example, 200mm, 250mm, 280mm, 300mm, 330mm, 350mm, 380mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, 700mm, 750mm, 780mm, 800mm, 850mm, 900mm, 950mm, 1000mm, etc.

[0252] In this embodiment, by setting the length of the control compartment 12 to 200mm-1000mm, it is beneficial to improve the energy density of the energy storage device 100 while facilitating the assembly of the control module 30 and the thermal management module 20.

[0253] In some embodiments, referring to FIGS. 8-10, the battery compartment 11 has a second compartment door 111. The box body 1 has an inspection door 16, and the second compartment door 111 and the inspection door 16 are located on the same side along the width direction of the container 10.

[0254] One of the wall portions provided on both sides of the container 10 along the width direction is a wall portion in which the second door 111 and the maintenance door 16 are provided. By providing the second door 111, the battery monomers 2 can be filled into or taken out of the container 10 when the second door 111 is opened. When the second door 111 is closed, the second door 111 can separate the battery monomers 2 from the outside, thereby reducing the risk of the outside environment interfering with the battery monomers 2. The maintenance door 16 is provided on the same side of the second door 111. By opening the maintenance door 16, the maintenance of the master control module 301 located in the control compartment 12 can be facilitated.

[0255] By providing the maintenance door 16 on the container 10, the master control module 301 can be maintained along the width direction, thereby facilitating the maintenance of the master control module 301.

[0256] In some embodiments, referring to FIG. 11, at least part of the containers 10 include the first connector 6 electrically connected with the control module 30, and each container 10 includes the second connector 7 electrically connected with the battery monomer 2, and the first connector 6 is configured to cooperate with each second connector 7.

[0257] At least part of the containers 10 including the first connector 6 means that part of the containers 10 include the first connector 6, and the other part of the containers 10 do not include the first connector 6, or all of the containers 10 include the first connector 6.

[0258] The first connector 6 can be directly connected with the second connector 7 to realize the cooperation of the first connector 6 and the second connector 7, for example, the first connector 6 is insertedly connected with each second connector 7. The first connector 6 can be fixed to the control compartment 12, and the second connector 7 can be movably arranged on the box body 1. The first connector 6 can be movably arranged on the control compartment 12, and the second connector 7 can be fixedly arranged on the box body 1. The first connector 6 and the second connector 7 can be movably arranged on the control compartment 12 and the box body 1, respectively. The first connector 6 can include a plurality of connecting portions corresponding to and connected with the second connector 7, so as to realize the connection of the first connector 6 and the plurality of second connectors 7.

[0259] For example, the first connector 6 is arranged on the partition of the control compartment 12.

[0260] The first connector 6 can be connected with the second connector 7 through a connecting member, and the connecting member can be a cable. The first connector 6 and the second connector 7 can be fixed on the box body 1, respectively. The first connector 6 can be fixed on the box body 1, and the second connector 7 can be movably arranged on the box body 1. The first connector 6 can be movably arranged on the box body 1, and the second connector 7 can be fixedly arranged on the box body 1. The first connector 6 and the second connector 7 can be movably arranged on the box body 1, respectively.

[0261] As an example, the first connector 6 is fixedly arranged on the control compartment 12, and the two second connectors 7 are respectively fixedly arranged on the two box bodies 1. The first connector 6 and the second connector 7 are connected through a cable. The cable can be a quick plug cable, and both ends of the cable are provided with quick connectors, and the two quick connectors are respectively connected with the first connector 6 and the second connector 7.

[0262] In the embodiment in which the first connector 6 and the second connector 7 are connected through the cable, the cable can be at least partially arranged in the interior of the container 10, or part of the cable can be arranged outside the container 10. The interface of the first connector 6 can be arranged outside the control compartment 12, and the cable can be arranged outside the control compartment 12. The interface of the second connector 7 can be arranged outside the box body 1, and the cable can be arranged outside the box body 1.

[0263] In this embodiment, the first connector 6 and each second connector 7 are matched to realize the quick connection between the control module 30 and the battery monomer 2, so that the connection between the control module 30 and the battery monomer 2 is more convenient.

[0264] In some embodiments, referring to FIG. 11, the container 10 includes a plurality of battery devices, and each battery device includes a thermal management component and a plurality of battery monomers 2. At least part of the container 10 includes a third connector 8, and each container 10 includes a fourth connector 9. The third connector 8 is in communication with the thermal management module 20, and the fourth connector 9 is in communication with the thermal management component. The third connector 8 is used to cooperate with each fourth connector 9.

[0265] The fact that at least part of the container 10 includes the third connector 8 means that part of the container 10 includes the third connector 8, and the other part of the container 10 does not include the third connector 8. Alternatively, all of the containers 10 include the third connector 8.

[0266] In some embodiments, the plurality of battery monomers 2 are arranged to form a battery monomer assembly.

[0267] As an example, the battery monomer assembly can be a battery module. The battery module is formed by arranging and fixing a plurality of battery monomers 2 to form an independent module. As an example, the battery module can be formed by binding a plurality of battery monomers 2 with a cable tie.

[0268] The third connector 8 can be in direct communication with the fourth connector 9 to realize the cooperation of the third connector 8 and the fourth connector 9, for example, the third connector 8 is in plug-in cooperation with each fourth connector 9. Among them, the third connector 8 can be fixed to the control bin 12, and the fourth connector 9 is movably arranged in the box body 1; or the third connector 8 is movably arranged in the control bin 12, and the fourth connector 9 is fixedly arranged in the box body 1; or the third connector 8 and the fourth connector 9 are movably arranged in the control bin 12 and the box body 1 respectively. The third connector 8 can include a plurality of connecting parts, which correspond to and connect with the fourth connector 9 one by one, so as to realize the communication between the third connector 8 and the plurality of fourth connectors 9.

[0269] Exemplarily, the third connector 8 is arranged on the partition of the control bin 12, for example.

[0270] The third connector 8 can also be in communication with the fourth connector 9 through a connecting piece, which can be a pipeline. Among them, the third connector 8 and the fourth connector 9 can be fixed to the control bin 12 and the box body 1 respectively; or the third connector 8 is fixed to the control bin 12, and the fourth connector 9 is movably arranged in the box body 1; or the third connector 8 is movably arranged in the control bin 12, and the fourth connector 9 is fixedly arranged in the box body 1; or the third connector 8 and the fourth connector 9 are movably arranged in the control bin 12 and the box body 1 respectively.

[0271] As an example, the thermal management module 20 is provided with the third connector 8, each container 10 is provided with the fourth connector 9, and the third connector 8 and the fourth connector 9 are in communication through a pipeline. The pipeline can be a quick plug pipeline, both ends of the pipeline are provided with quick connectors, the first connector 6 and the second connector 7 are also quick connectors, and the two quick connectors at both ends of the pipeline are connected with the first connector 6 and the second connector 7 respectively.

[0272] In this embodiment, the cooperation of the third connector 8 and the fourth connector 9 can realize the quick communication of the thermal management component and the thermal management module 20, and facilitate the installation of the thermal management module 20.

[0273] In some embodiments, the weight of a single battery monomer 2 is 5kg to 60kg.

[0274] The weight of a single battery monomer 2 can be any one of 5kg, 10kg, 15kg, 20kg, 25kg, 30kg, 35kg, 40kg, 45kg, 50kg, 55kg, 60kg or any point value between any two of them. As an example, the mass of a single battery monomer 2 is 30kg.

[0275] The weight of the battery monomer 2 is appropriate, so that a proper amount of battery monomers 2 can be placed in the box body 1, and the energy density is moderate under the condition of meeting the transportation demand.

[0276] In some embodiments, the weight of the container 10 is M, and M≤35 tons.

[0277] For example, the weight of the container 10 can be any one of 10 tons, 15 tons, 20 tons, 25 tons, 30 tons, 35 tons, or any value between any two of them.

[0278] During the hoisting of the container 10, it is convenient for the hoisting of the relevant hoisting device, and the transfer work of the container 10 is facilitated.

[0279] In some embodiments, the weight of the container 10 is M, the total weight of the battery monomer 2 in the box body 1 is M1, and (M1 / M)×100%≥60%.

[0280] For example, (M1 / M)×100% can be 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 90%, etc.

[0281] In this way, on the one hand, the weight ratio of the battery monomer 2 in the container 10 per unit volume can be improved, and the power of the container 10 per unit volume can be improved; on the other hand, during the transportation of the container 10, more battery monomers 2 that contribute to energy storage and have higher production difficulty and cannot be produced at the destination are transported, while other structures can be produced at a location close to the destination without transportation or with reduced transportation, and after the container 10 is assembled into the energy storage device 100, the transportation cost of the assembled energy storage device 100 is reduced.

[0282] In some embodiments, (M1 / M)×100%≥80%.

[0283] For example, (M1 / M)×100% can be 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, or 90%, etc.

[0284] In this way, the transportation cost of the assembled energy storage device 100 is further reduced.

[0285] In some embodiments, the weight of the container 10 is M, the box body 1 is provided with a plurality of battery devices, the battery device includes a containing box and a plurality of battery monomers 2, the plurality of battery monomers 2 are contained in the containing box, the total weight of the battery device is M2, and 70%≤(M2 / M)×100%≤90%.

[0286] The accommodating box can include two parts, such as an upper cover and a bottom plate, which are mutually covered, and the upper cover and the lower box body 1, which together form an accommodating space for accommodating the battery monomer 2. The heat management component can be part of the accommodating box or the heat management component is located in the accommodating space.

[0287] (M2 / M)×100% can be any one of 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90% or a point value between any two of them.

[0288] When (M2 / M)×100%≥70%, the weight ratio of the battery monomer 2 in the container 10 per unit volume can be increased, and the energy density of the container 10 can be increased; when (M2 / M)×100%≤90%, the structural strength of the container 10 can be maintained. Therefore, when 70%≤(M2 / M)×100%≤90%, the energy density of the container 10 and the structural strength of the container 10 can be considered, and the practicability of the container 10 is stronger.

[0289] In some embodiments, the volume of the container 10 is V, the total volume of the battery monomer 2 in the box body 1 is V1, and (V1 / V)×100%≥30%.

[0290] The battery monomer 2 includes a shell, and the volume of the battery monomer 2 is the volume of the shell. For example, the battery monomer 2 is a square shell battery monomer 2, and the product of the length, width and height of the square shell battery monomer 2 is the product of the length, width and height of the shell.

[0291] In embodiments in which the battery monomer 2 also includes an electrode terminal, the electrode terminal is disposed on the shell and partially protrudes from the shell, the electrode terminal is electrically connected to the electrode assembly, and the part of the electrode terminal protruding from the shell is not included in the volume of the battery monomer 2.

[0292] (V1 / V)×100% can be 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 55%, 60%, 65% or 70% and the like.

[0293] On one hand, the volume proportion of the battery monomer 2 in the container 10 per unit volume can be increased, and the electric quantity of the container 10 per unit volume can be increased; on the other hand, during the transportation of the container 10, more battery monomers 2 that contribute to the storage energy and have a higher production difficulty and cannot be produced at the destination are transported, and other functional elements such as control elements of the storage device 100 can be produced at a place close to the destination and do not need to be transported or the transportation is reduced, which is beneficial to reduce the transportation cost of the storage device 100 assembled from the container 10.

[0294] In some embodiments, (V1 / V) x 100% ≥ 50%.

[0295] (V1 / V) x 100% can be 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 75%, 80%, 85%, or 90%, etc.

[0296] Further, the transportation cost of the storage device 100 assembled from the container 10 can be reduced.

[0297] In some embodiments, the volume of the container 10 is V, the container 10 is provided with a plurality of battery devices, each battery device includes a containing box and a plurality of battery monomers 2, the plurality of battery monomers 2 are contained in the containing box, the total volume of the battery device is V2, and 50% ≤ (V2 / V) x 100% ≤ 80%.

[0298] The volume of the battery monomer 2 is the volume of the containing box. For example, the containing box has a cuboid structure, and the volume of the battery monomer 2 is equal to the product of the length, width, and height of the containing box.

[0299] (V2 / V) x 100% can be 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 75%, 80%, or any point value between any two of them.

[0300] When (V2 / V) x 100% ≥ 50%, the volume proportion of the battery monomer 2 in the container 10 per unit volume can be increased, and the energy density of the container 10 can be increased; when (V2 / V) x 100% ≤ 80%, the container 10 has sufficient structural members to maintain the structural strength of the container 10. Therefore, when 50% ≤ (V2 / V) x 100% ≤ 80%, the energy density of the container 10 and the structural strength of the container 10 can be considered, and the practicability of the container 10 is stronger.

[0301] In some embodiments, the energy of the container 10 is E, the size of the box 1 along the length direction of the container 10 is a, the size of the box 1 along the width direction of the container 10 is b, 250KW / m 2 ≤E / (a×b)≤700KW / m 2 .

[0302] E / (a×b) can be any one of the point values of 250KW / m 2 , 300KW / m 2 , 350KW / m 2 , 400KW / m 2 , 450KW / m 2 , 460KW / m 2 , 470KW / m 2 , 480KW / m 2 , 485KW / m 2 , 490KW / m 2 , 495KW / m 2 , 500KW / m 2 , 510KW / m 2 , 550KW / m 2 , 600KW / m 2 , 650KW / m 2 , 700KW / m 2 or any point value between any two of them.

[0303] The energy E can be obtained from the container 10 nameplate.

[0304] When E / (a×b)≥250KW / m 2 , the container 10 can have a large energy density, improving the practicability of the container 10; when E / (a×b)≤700KW / m 2 , the risk of the container 10 being too heavy to crush other containers 10 can be reduced, facilitating the transportation of the container 10. Therefore, when 250KW / m 2 ≤E / (a×b)≤700KW / m 2 , the energy density of the container 10 and the mass of the container 10 are considered, improving the practicability of the container 10 and facilitating the transportation of the container 10.

[0305] In some embodiments, 450KW / m 2 ≤E / (a×b)≤600KW / m 2 .

[0306] E / (a×b) can be any one of the point values of 450KW / m 2 , 455KW / m 2, 460 KW / m 2 , 465 KW / m 2 , 470 KW / m 2 , 475 KW / m 2 , 480 KW / m 2 , 485 KW / m 2 , 490 KW / m 2 , 495 KW / m 2 , 500 KW / m 2 , 505 KW / m 2 , 510 KW / m 2 , 515 KW / m 2 , 520 KW / m 2 , 530 KW / m 2 , 540 KW / m 2 , 550 KW / m 2 , 600 KW / m 2 a point value of any one of the above or a point value between any two of the above.

[0307] As an example, E / (a x b) = 490 KW / m 2 The energy density of the container 10 and the mass of the container 10 can be further improved, facilitating transportation of the container 10.

[0308] In some embodiments, two adjacent containers 10 are connected by welding, clamping, locking, or through a fixing member along the height direction of the container 10.

[0309] The fixing member can be at least one of a bolt and nut, a pin, a screw, or a rivet. Of course, the fixing member can also include a fixing plate or the like to fixedly connect two adjacent containers 10 along the height direction.

[0310] By connecting two adjacent containers 10 along the height direction through a fixing member, the fixing member can be used to limit the two adjacent containers 10 along the height direction, which is beneficial to reduce the risk of mutual movement of the two adjacent containers 10 after stacking is completed, thereby improving the structural stability of the energy storage device 100.

[0311] In some embodiments, referring to FIGS. 3-10 and 13, the plurality of containers 10 includes a first container 3 and a second container 4, the first container 3 is located above the second container 4, the bottom of the first container 3 is provided with a limiting pin 42, the top of the second container 4 has a limiting hole 411, and the limiting pin 42 is clamped with the limiting hole 411.

[0312] The container 10 comprises the first container 3 and the second container 4, and the same container 10 is the first container 3 relative to the container 10 below and is the second container 4 relative to the container 10 above, that is, the container 10 can be both the first container 3 and the second container 4. In other words, the limiting pin 42 can be arranged at the bottom of the container 10, and the limiting hole 411 can be arranged at the top of the container 10.

[0313] In this way, the two adjacent containers 10 in the height direction are limited from moving relative to each other by the cooperation of the limiting pin 42 and the limiting hole 411 through a simple structure.

[0314] The limiting hole 411 at the top of the second container 4 can be an opening for hoisting the container 10, so that the container 10 is hoisted through the opening during the hoisting stage of the container 10, and after the hoisting of the container 10 is completed, the opening at the top of the container 1 cooperates with the limiting pin 42 at the bottom of the adjacent container 10 above to limit the two adjacent containers 10, so as to facilitate the simplification of the structure of the container 10.

[0315] In some embodiments, and as shown in FIG. 13, the bottom of the first container 3 is provided with a first limiting piece 31, the first limiting piece 31 is provided with a limiting slot 311, the top of the second container 4 is provided with a second limiting piece 41, the second limiting piece 41 is provided with a limiting hole 411, and the two ends of the limiting pin 42 are respectively clamped with the limiting slot 311 and the limiting hole 411.

[0316] The second limiting piece 41 can be the hoisting part as described above, and the limiting hole 411 can be the opening as described above. The limiting hole 411 can also be a hole arranged on the container 1 of the container 10.

[0317] In this embodiment, during the stacking of the containers 10 in the height direction, the limiting pin 42 cooperates with the limiting slot 311 of the container 10 above among the two adjacent containers 10 and cooperates with the limiting hole 411 of the container 10 below among the two adjacent containers 10, so that the relative movement of the two adjacent containers 10 is limited through a simple structure.

[0318] In some embodiments, the heights of a part of the containers 10 among the m containers 10 in the height direction of the container 10 are not equal to the heights of another part of the containers 10.

[0319] In this way, the flexibility of the capacity of the container 10 is improved, and different requirements are matched.

[0320] In some embodiments, the sizes of the m containers 10 in the height direction of the container 10 are equal.

[0321] Thus, the manufacturing process is simplified and the cost is reduced.

[0322] In some embodiments, the first direction is a height direction of the container 10, and the standard container 10 is a 20-foot standard container 10, and the height of the standard container 10 is 2896 mm, 2591 mm or 2438 mm.

[0323] The sum of the sizes of the m1 containers 10 in the height direction is 2896 mm, 2591 mm or 2438 mm, which is the height of the 20-foot standard container 10.

[0324] The above is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Those skilled in the art can make various modifications and changes to the present disclosure. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present disclosure is included in the protection scope of the present disclosure.

Claims

1. An energy storage device, comprising: a plurality of m containers, m≥2, the plurality of m containers being arranged along a first direction of the containers; in the first direction, the containers have a size smaller than that of a standard container; the containers comprise a box body and a plurality of battery cells, the plurality of battery cells being accommodated in the box body; a control module arranged in the box body, the control module being configured to electrically control the plurality of battery cells of the plurality of m containers; a thermal management module arranged in the box body, the thermal management module being configured to manage the temperature of the plurality of battery cells of the plurality of m containers.

2. The energy storage device of claim 1, wherein, Each of the containers is provided with the control module; or, part of the containers is provided with the control module, and the other part of the containers is not provided with the control module.

3. The energy storage device of claim 1 or 2, wherein, Each of the containers is provided with the thermal management module; or, part of the containers is provided with the thermal management module, and the other part of the containers is not provided with the thermal management module.

4. The energy storage device of any one of claims 1-3, wherein, The first direction is a length direction, a width direction or a height direction of the container.

5. The energy storage device of any one of claims 1-3, wherein, The first direction is a height direction of the container, the container has a length direction size consistent with that of a standard container, and has a width direction size consistent with that of the standard container, and the sum of the height direction sizes of m1 containers in the plurality of m containers is equal to the sum of the height direction sizes of n standard containers.

6. The energy storage device of claim 5, wherein, m1=2, n=1; or, m1=3, n=1; or, m1=3, n=2.

7. The energy storage device of any one of claims 1 to 6, wherein, At least part of the interior of the box body has a battery compartment and a control compartment, the battery compartment and the control compartment being arranged along a length direction of the container, the plurality of battery cells being accommodated in the battery compartment, and the control module and / or the thermal management module being accommodated in the control compartment, the length direction intersecting the first direction.

8. The energy storage device of claim 7, wherein, At least part of the box body comprises an isolation layer, the isolation layer separating the control compartment into a first compartment and a second compartment, the first compartment and the second compartment sharing the isolation layer, the first compartment being configured to accommodate the thermal management module, and the second compartment being configured to accommodate the control module.

9. The energy storage device of claim 8, wherein, The first compartment and the second compartment are arranged along a width direction of the container, and the first compartment is arranged at a front side of the second compartment.

10. The energy storage device of claim 8 or 9, wherein, The second compartment has a first compartment door arranged at a side of the second compartment away from the battery compartment.

11. The energy storage device of any one of claims 7-10, wherein, The plurality of containers comprises a first container and a second container, the first container being arranged above the second container, the thermal management module being accommodated in the control compartment of the first container, and the control module being accommodated in the control compartment of the second container.

12. The energy storage device of claim 11, wherein, The control compartment of the second container has a first compartment door arranged at a side of the control compartment away from the battery compartment.

13. The energy storage device of any one of claims 7-12, wherein, The box body comprises a first top wall and a plurality of first side walls surrounding the first top wall, the first top wall and at least one of the first side walls being provided with a ventilation opening for ventilation of the thermal management module.

14. The energy storage device of any one of claims 7-13, wherein, The top of the control bin is provided with a first wire passing hole; and / or, the bottom of the control bin is provided with a second wire passing hole.

15. The energy storage device of claim 14, wherein, The container further comprises a sealing plate which is detachably arranged in the first wire passing hole.

16. The energy storage device of claim 14 or 15, wherein, The container further comprises an auxiliary source wire harness which enters the control bin through the second wire passing hole and is electrically connected with the control module and / or the thermal management module.

17. The energy storage device of any one of claims 7-16, wherein, The bottom of the battery bin is provided with a floor drain.

18. The energy storage device of any one of claims 7-17, wherein, The size ratio of the control bin and the battery bin in the length direction is 0.03-0.

18.

19. The energy storage device of any one of claims 7-18, wherein, The size of the control bin in the length direction is 200mm-1000mm.

20. The energy storage device of any one of claims 7-19, wherein, The battery bin is provided with a second bin door; the box body is provided with an inspection door, and the second bin door and the inspection door are located on the same side along the width direction of the container.

21. The energy storage device of any one of claims 1-20, wherein, At least part of the container comprises a first connector which is electrically connected with the control module, and each container comprises a second connector which is electrically connected with a battery monomer, and the first connector is used for cooperating with each second connector.

22. The energy storage device of any one of claims 1-21, wherein, The container comprises a plurality of battery devices, and each battery device comprises a thermal management component and a plurality of battery monomers. At least part of the container comprises a third connector which is in communication with the thermal management module, and each container comprises a fourth connector which is in communication with the thermal management component, and the third connector is used for cooperating with each fourth connector.

23. The energy storage device of any one of claims 1-22, wherein, The control module comprises a main control module, a power distribution module, a master control module and a fire control module, the battery monomer is electrically connected with the main control module, the main control module is electrically connected with the master control module, and the main control module, the master control module and the fire control module are all electrically connected with the power distribution module.

24. The energy storage device of any one of claims 1-23, wherein, The weight of a single battery monomer is 5kg to 60kg.

25. The energy storage device of any one of claims 1-24, wherein, The weight of the container is M, and M≤35 tons.

26. The energy storage device of any one of claims 1-25, wherein, The weight of the container is M, the total weight of the battery monomers in the box body is M1, and (M1 / M)×100%≥60%.

27. The energy storage device of claim 26, wherein, (M1 / M)×100%≥80%.

28. The energy storage device of any one of claims 1-27, wherein, The weight of the container is M, the box body is provided with a plurality of battery devices, the battery device comprises a containing box and a plurality of battery monomers, the plurality of battery monomers are contained in the containing box, the total weight of the battery device is M2, and 70%≤(M2 / M)×100%≤90%.

29. The energy storage device of any one of claims 1-28, wherein, The volume of the container is V, the total volume of the battery monomers in the box body is V1, and (V1 / V)×100%≥30%.

30. The energy storage device of claim 29, wherein, (V1 / V)×100%≥50%.

31. The energy storage device of any one of claims 1-30, wherein, The volume of the container is V, the box body is provided with a plurality of battery devices, the battery device comprises a containing box and a plurality of battery monomers, the plurality of battery monomers are contained in the containing box, the total volume of the battery device is V2, and 50%≤(V2 / V)×100%≤80%.

32. The energy storage device of any one of claims 1-31, wherein, The energy of the container is E, the size of the box along the length direction of the container is a, the size of the box along the width direction of the container is b, 250KW / m 2 ≤E / (a×b)≤700KW / m 2 .

33. The energy storage device of claim 32, wherein, 450 KW / m 2 ≤ E / (a x b) ≤ 600 KW / m 2 .

34. The energy storage device of any one of claims 1-33, wherein, Along the height direction of the container, two adjacent containers are connected by welding, clamping, locking or fixing.

35. The energy storage device of any one of claims 1-34, wherein, The plurality of containers comprises a first container and a second container, the first container is located above the second container, the bottom of the first container is provided with a limiting pin, the top of the second container is provided with a limiting hole, and the limiting pin is clamped with the limiting hole.

36. The energy storage device of claim 35, wherein, The bottom of the first container is provided with a first limiting piece, the first limiting piece is provided with a limiting slot, the top of the second container is provided with a second limiting piece, the second limiting piece is provided with the limiting hole, and the two ends of the limiting pin are clamped with the limiting slot and the limiting hole respectively.

37. The energy storage device of any one of claims 1-34, wherein, The energy storage device further comprises a connecting mechanism configured to connect two adjacent containers in the height direction of the container. The connecting mechanism comprises a support arranged between two adjacent containers in the height direction; the sum of the sizes of m1 containers in the height direction and the sum of the sizes of m1-1 supports in the height direction is equal to the sum of the sizes of n standard containers in the height direction.

38. The energy storage device of any one of claims 1-3, wherein, In the height direction of the container, the height of a part of the m containers is not equal to the height of another part of the m containers; or the size of the m containers in the height direction of the container is equal.

39. The energy storage device of any one of claims 1-3, wherein, The first direction is the height direction of the container, the standard container is a 20-foot standard container, and the height of the standard container is 2896mm, 2591mm or 2438mm.

40. A container comprising a box and a plurality of battery cells, the plurality of battery cells being housed in the box, and the container being configured to house at least one of a control module and a thermal management module.

41. An energy storage system comprising a power conversion device and an energy storage device according to any one of claims 1-39, the power conversion device being configured to electrically connect a power generation device and the energy storage device.

42. A charging network comprising a charging post and an energy storage device according to any one of claims 1-39 or an energy storage system according to claim 41, the energy storage device being configured to provide electrical energy to the charging post.

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