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

Abstract

The embodiment of the utility model provides a container, an energy storage device, an energy storage system and a charging network. The energy storage device comprises a container, a control module and a heat management module. The number of the containers is m, m is larger than or equal to 2, and the m containers are arranged in the first direction of the containers. In the first direction, the size of the container is smaller than that of a standard container. The container comprises a container body and a plurality of single batteries, and the plurality of single batteries are accommodated in the container body. And the control module is arranged in the box body and is used for electrically controlling the plurality of single batteries in the m containers. And the heat management module is arranged in the box body and is used for managing the temperature of the plurality of single batteries of the m containers. According to the energy storage device provided by the embodiment of the invention, the convenience in the transportation process of the container is improved, the transportation cost of the container and the energy storage device using the container is reduced, the space in the container can be fully utilized, the integration degree is high, and the assembly efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a container, an energy storage device, an energy storage system, and a charging network. Background Art

[0002] With the rapid development of technology, electric energy has become an indispensable energy source in people's production and life. In order to improve the smoothness of electric energy supply and realize the normal operation of production and life, energy storage devices are required. As a device for cyclically storing and releasing electric energy, through charging or discharging the energy storage device, electric energy can be stored in the energy storage device or the electric energy stored in the energy storage device can be supplied to the electrical device. Energy storage devices are widely used in fields such as industrial power supply, household power supply, temporary power supply, mobile power supply, wind power generation, solar power generation, and energy storage power stations.

[0003] 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 an issue that cannot be ignored. Therefore, how to reduce the use cost of energy storage devices is a technical problem that is continuously improved in energy storage technology. Summary of the Utility Model

[0004] In view of this, embodiments of the present application are expected to provide a container, an energy storage device, an energy storage system, and a charging network that can reduce the use cost of the energy storage device.

[0005] To achieve the above object, a first aspect of the embodiments of the present application provides an energy storage device, including:

[0006] Containers, there are m containers, m≥2, and the m containers are arranged along a first direction of the containers; in the first direction, the size of the container is smaller than the size of a standard container; the container includes a box body and battery cells, and there are multiple battery cells, and the multiple battery cells are accommodated in the box body;

[0007] A control module, arranged in the box body, and the control module is used for electrically controlling the multiple battery cells of the m containers;

[0008] A thermal management module, arranged in the box body, and the thermal management module is used for managing the temperature of the multiple battery cells of the m containers.

[0009] The energy storage device provided by the embodiment of the present application, by setting the dimension of the container in the first direction to be smaller than the dimension of a standard container in the first direction. On the one hand, by reducing the size of the container, the weight of the container can be made smaller than that of a standard container, so that it can match the standard spreader. That is, while meeting the requirement that the weight does not exceed the transportation and road limits, it can also match the transportation tools of existing standard containers, which is beneficial to improving the problem of overweight transportation, 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 dimension of the corresponding standard container for sea or land transportation in the first direction of the container during transportation, which is beneficial to improving the convenience during the transportation of the container. On the further hand, by setting the control module, the control module can control the electrical energy input or output of the battery cell to achieve the electrical control of the battery cell. By setting 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 yet another hand, by arranging the control module and the thermal management module in the container, the space inside the container can be fully utilized, with high integration, which is beneficial to improving the assembly efficiency and convenient for customers to use.

[0010] In some embodiments, each of the containers is provided with the control module; or, some of the containers are provided with the control module, and some of the other containers are not provided with the control module.

[0011] In some embodiments, each of the containers is provided with the thermal management module; or, some of the containers are provided with the thermal management module, and some of the other containers are not provided with the thermal management module.

[0012] In some embodiments, the first direction is the length direction, width direction or height direction of the container.

[0013] In some embodiments, the first direction is the height direction of the container, the dimension of the container in its length direction is the same as that of the standard container in the length direction, the dimension of the container in its width direction is the same as that of the standard container in the width direction, and the sum of the dimensions of m1 of the m containers in the height direction is equal to the sum of the dimensions of n standard containers in the height direction.

[0014] By setting the dimension of the container in the height direction to be smaller than that of a standard container in the height direction, the container does not exceed the height of the corresponding standard container for sea or land transportation in the height direction of the container during transportation, which is beneficial to improving the convenience during container transportation. The dimensions of the container in the length direction and the width direction of the container are both the same as those of the standard container, so that the horizontal area occupied by the container during transportation is the same as that of the standard container. The dimensions of m1 containers in the height direction are the same as those of n standard containers in the height direction, which can make the space occupied by m1 containers during stacking the same as the space occupied by n standard containers, improving the utilization rate of the space for container placement, being beneficial to making full use of the available space in the height direction during transportation, reducing the space waste during container transportation, reducing the transportation costs of the container and the energy storage device using the container, and thus reducing the usage cost of the energy storage device. Stacking the containers can also reduce the floor area and save space.

[0015] In some embodiments, m1 = 2, n = 1; or, m1 = 3, n = 1; or, m1 = 3, n = 2.

[0016] In some embodiments, 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 are arranged along the length direction of the container. A plurality of the battery cells are accommodated in the battery compartment, and the control module and / or the thermal management module are accommodated in the control compartment. The length direction intersects with the first direction.

[0017] The control module and / or the thermal management module in the control compartment can be connected to the battery compartments on both sides in the length direction of the container by shorter lines or pipelines.

[0018] It improves the utilization rate of the space for container placement, reduces the land waste of having to reserve a maintenance passage of more than 3m between each traditional container. Only a normal touch-up and maintenance passage needs to be reserved between the cross-shaped containers, which improves the land investment return of the user and increases the energy return per unit area of the user.

[0019] In some embodiments, at least part of the box body includes an isolation layer. The isolation layer divides the control compartment into a first compartment and a second compartment. The first compartment and the second compartment share the isolation layer. The first compartment is used to accommodate the thermal management module, and the second compartment is used to accommodate the control module.

[0020] The isolation layer separates the thermal management module and the control module, reducing the risk of interference between the thermal management module and the control module, thereby improving the reliability of the energy storage device.

[0021] In some embodiments, the first bin and the second bin are arranged along the width direction of the container, and the first bin is disposed in front of the second bin.

[0022] It is beneficial to the connection between the thermal management module and the heat exchange pipeline, and can also reduce the number of elbows in the heat exchange pipeline, thereby reducing flow resistance and improving the temperature control effect of the thermal management module.

[0023] In some embodiments, the second compartment has a first compartment door, and the first compartment door is disposed on a side of the second compartment facing away from the battery compartment.

[0024] It reduces the land waste of traditional containers where maintenance channels of more than 3 meters must be reserved between each container. Only normal paint repair channels need to be reserved between the grid containers, which increases the user's land investment returns and the user's energy benefits per unit area.

[0025] In some embodiments, the plurality of containers include a first container and a second container, the first container is located above the second container, the thermal management module is accommodated in the control compartment of the first container, and the control module is accommodated in the control compartment of the second container.

[0026] This can reduce the interference of the thermal management module on the control module. In addition, the thermal management module is located in the first container above, which further facilitates heat dissipation of the thermal management module, allowing the thermal management module to have more heat dissipation channels and improving the temperature control effect of the thermal management module.

[0027] 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.

[0028] The first door can be used to open or close the control compartment of the second container, and can be used to inspect and repair the control module installed in the second compartment, reducing the land waste of traditional containers where a maintenance channel of more than 3m must be reserved between each container. Only normal paint repair channels need to be reserved between the grid containers, which increases the user's land investment returns and the user's energy benefits per unit area.

[0029] In some embodiments, the box body includes 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 are provided with ventilation holes, and the ventilation holes are used for ventilation of the thermal management module.

[0030] This is beneficial to the heat dissipation of the thermal management module, so that the thermal management module can have more heat dissipation channels, thereby improving the temperature control effect of the thermal management module.

[0031] In some embodiments, a first wire passing hole is provided at the top of the control bin; and / or, a second wire passing hole is provided at the bottom of the control bin.

[0032] A second wire passing hole is provided at the bottom of the control bin. The wire harness connected to the PCS and the EMS enters the second bin through the first wire passing hole of the upper container, is connected to the control module, and then exits the container through the second wire passing hole of the upper container. Then it can enter the second bin through the first wire passing hole of the lower container, be connected to the control module, and then exit the container through the second wire passing hole of the lower container.

[0033] In some embodiments, the container further includes a sealing plate, and the sealing plate is detachably arranged at the first wire passing hole.

[0034] By providing the sealing plate, while not affecting the passing of the wire harness, it is also beneficial to improve the sealing performance of the container.

[0035] In some embodiments, the container further includes an auxiliary power wire harness, and the auxiliary power wire harness enters the control bin through the second wire passing hole and is electrically connected to the control module and / or the thermal management module.

[0036] By electrically connecting the auxiliary power wire harness to 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.

[0037] In some embodiments, a floor drain is provided at the bottom of the battery bin. It is beneficial for the condensed water to be discharged out of the battery bin through the floor drain.

[0038] In some embodiments, the size ratio of the control bin to the battery bin in the length direction is 0.03 - 0.18. It is beneficial to improve the energy density of the energy storage device and is also beneficial to the assembly of the control module and the thermal management module.

[0039] In some embodiments, the size of the control bin in the length direction is 200 mm - 1000 mm. It is beneficial to improve the energy density of the energy storage device and is also beneficial to the assembly of the control module and the thermal management module.

[0040] In some embodiments, the battery bin has a second bin door; the box body has a maintenance door, and the second bin door and the maintenance door are on the same side along the width direction of the container. By providing a maintenance door on the container, it is beneficial to maintain the main control module along the width direction, making the maintenance of the main control module more convenient.

[0041] In some embodiments, at least a part of the container includes a first connector electrically connected to the control module. Each container includes a second connector electrically connected to a battery cell. The first connector is configured to cooperate with each second connector.

[0042] By the cooperation of the first connector and each second connector, rapid connection between the control module and the battery cells can be achieved, making the connection between the control module and the battery cells more convenient.

[0043] In some embodiments, the container includes a plurality of battery devices, and each battery device includes a thermal management component and a plurality of the battery cells;

[0044] At least a part of the container includes a third connector. Each container includes a fourth connector. The third connector communicates with the thermal management module, and the fourth connector communicates with the thermal management component. The third connector is configured to cooperate with each fourth connector.

[0045] The cooperation of the third connector and the fourth connector can achieve rapid communication between the thermal management component and the thermal management module, facilitating the installation of the thermal management module.

[0046] In some embodiments, the control module includes a main control module, a power distribution module, a general control module, and a fire control module. The battery cell is electrically connected to the main control module, the main control module is electrically connected to the general control module, and the main control module, the general control module, and the fire control module are all electrically connected to the power distribution module.

[0047] The main control module is configured to control the input and output of high-voltage electric energy of the battery cells in the container. The general control module is configured to control the switching actions of the main control module in the container. The fire control module is configured to control the actions of fire-fighting components when a fire occurs due to temperature imbalance in the container. The fire-fighting components can be fire extinguishers, etc., and the fire-fighting components can be arranged in the container. The power distribution module is configured to electrically connect the main control module, the general control module, and the fire control module to facilitate the conduction of the circuits of the main control module, the general control module, and the fire control module and maintain the normal operation of the main control module, the general control module, and the fire control module.

[0048] In some embodiments, the weight of a single battery cell is 5 kg to 60 kg.

[0049] The weight of the battery cell is appropriate so that an appropriate amount of battery cells can be placed in the container, and the energy density is moderate while meeting the transportation requirements.

[0050] In some embodiments, the weight of the container is M, where M ≤ 35 tons.

[0051] During the hoisting process of the container, it facilitates the hoisting of relevant hoisting devices and the transfer work of the container.

[0052] In some embodiments, the weight of the container is M, and the total weight of the battery cells in the container is M1, where (M1 / M)×100%≥60%.

[0053] In this way, on the one hand, it can increase the weight ratio of battery cells in the container per unit volume and improve the power of the container per unit volume; on the other hand, during the transportation of the container, what is transported more is the battery cells that contribute to the energy storage capacity and are difficult to produce at the destination, while other structures can be produced near the destination without transportation or with reduced transportation. After the container is assembled into an energy storage device, it is beneficial to reduce the transportation cost of the assembled energy storage device.

[0054] In some embodiments, (M1 / M)×100%≥80%.

[0055] In this way, it is further beneficial to reduce the transportation cost of the assembled energy storage device.

[0056] In some embodiments, the weight of the container is M, and there are multiple battery devices arranged in the container. The battery device includes a containing box and multiple battery cells, and the multiple battery cells are accommodated in the containing box. The total weight of the battery device is M2, and 70%≤(M2 / M)×100%≤90%.

[0057] When (M2 / M)×100%≥70%, it can increase the weight ratio of battery cells in the container per unit volume and improve the energy density of the container; when (M2 / M)×100%≤90%, it can maintain the structural strength of the container. Therefore, when 70%≤(M2 / M)×100%≤90%, it can balance the energy density and the structural strength of the container, and the container has stronger practicability.

[0058] In some embodiments, the volume of the container is V, and the total volume of the battery cells in the container is V1, where (V1 / V)×100%≥30%.

[0059] On the one hand, it can increase the volume ratio of battery cells in the container per unit volume and improve the power of the container per unit volume; on the other hand, during the transportation of the container, what is transported more is the battery cells that contribute to the energy storage capacity and are difficult to produce at the destination, while other functional elements of the energy storage device such as control elements can be produced near the destination without transportation or with reduced transportation. After the container is assembled into an energy storage device, it is beneficial to reduce the transportation cost of the assembled energy storage device.

[0060] In some embodiments, (V1 / V)×100% ≥ 50%.

[0061] It is further beneficial to reduce the transportation cost of the energy storage device formed by assembly.

[0062] In some embodiments, the volume of the container is V, and a plurality of battery devices are arranged in the container. The battery device includes a receiving box and a plurality of battery cells. The plurality of battery cells are received in the receiving box, and the total volume of the battery device is V2, and 50% ≤ (V2 / V)×100% ≤ 80%.

[0063] When (V2 / V)×100% ≥ 50%, the volume ratio of the battery cells in the container per unit volume can be increased, and the energy density of the container can be improved; when (V2 / V)×100% ≤ 80%, there is enough volume of structural members in the container to maintain the structural strength of the container. Therefore, when 50% ≤ (V2 / V)×100% ≤ 80%, the energy density and the structural strength of the container can be taken into account, and the practicality of the container is stronger.

[0064] In some embodiments, the energy of the container is E, the dimension of the container body along the length direction of the container is a, and the dimension of the container body along the width direction of the container is b, 250KW / m 2 ≤ E / (a×b) ≤ 700KW / m 2 .

[0065] When E / (a×b) ≥ 250KW / m 2 It can make the container have a large energy density and improve the practicality of the container; when E / (a×b) ≤ 700KW / m 2 It can reduce the risk of crushing other containers due to the large mass of the container and facilitate the transportation of the container. Therefore, when 250KW / m 2 ≤ E / (a×b) ≤ 700KW / m 2 It takes into account the energy density and the mass setting of the container, improves the practicality of the container, and also facilitates the transportation of the container.

[0066] In some embodiments, 450KW / m 2 ≤ E / (a×b) ≤ 600KW / m 2 .

[0067] It can further improve the energy density and the mass setting of the container and facilitate the transportation of the container.

[0068] In some embodiments, along the height direction of the container, two adjacent containers are welded, clamped, locked or connected by fixing members.

[0069] It is beneficial to reduce the risk of mutual displacement between two adjacent containers after stacking is completed, and thus is beneficial to improving the structural stability of the energy storage device.

[0070] In some embodiments, the multiple containers include a first container and a second container. The first container is located above the second container. A limiting pin is provided at the bottom of the first container, and a limiting hole is provided at the top of the second container. The limiting pin is engaged with the limiting hole.

[0071] The fixation of two adjacent containers is achieved by the engagement of the limiting pin with the limiting hole, and the purpose of restricting the relative displacement between two adjacent containers is achieved by a simple structure.

[0072] In some embodiments, a first limiting member is provided at the bottom of the first container. The first limiting member is provided with a limiting groove. A second limiting member is provided at the top of the second container. The second limiting member is provided with the limiting hole. Two ends of the limiting pin are respectively engaged with the limiting groove and the limiting hole.

[0073] The fixation of two adjacent containers is achieved by the two ends of the limiting pin being respectively engaged with the limiting groove and the limiting hole, and the purpose of restricting the relative displacement between two adjacent containers is achieved by a simple structure.

[0074] In some embodiments, the energy storage device further includes a connection mechanism configured to be able to connect two adjacent containers along the height direction of the container;

[0075] Wherein, the connection mechanism includes a support member disposed between two adjacent containers along the height direction; the sum of the dimensions in the height direction of m1 of the m containers is equal to the sum of the dimensions in the height direction of n standard containers, which is equal to the sum of the dimensions in the height direction of m1 - 1 support members disposed between two adjacent containers along the height direction.

[0076] Connecting the containers through the connection mechanism can make the stacking of the containers more stable. When the containers are transported, the sum of the dimensions in the height direction of m1 containers plus the sum of the dimensions in the height direction of the support members disposed between two adjacent containers among the m1 containers is equal to the sum of the heights of n standard containers, which can efficiently utilize the transportation space occupied by the containers and save transportation costs.

[0077] In some embodiments, along the height direction of the container, the heights of a part of the m containers are not equal to the heights of another part of the m containers; or the dimensions of the m containers in the height direction of the container are equal.

[0078] 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 2896 mm, 2591 mm or 2438 mm.

[0079] The sum of the dimensions of m1 containers in the first direction is 2896 mm, 2591 mm or 2438 mm, which is the height of a 20-foot standard container.

[0080] In a second aspect of the embodiments of the present application, a container is provided. The container includes a box body and battery cells. There are multiple battery cells, and the multiple battery cells are accommodated in the box body; and the container can be used to accommodate at least one of a control module and a thermal management module.

[0081] For the container provided by the embodiments of the present application, by setting the dimension of the container in the first direction to be smaller than the dimension of a standard container in the first direction, on the one hand, by reducing the size of the container, the weight of the container can be made smaller than that of a standard container, so that a standard spreader can be matched. That is, without exceeding the transportation and road limits in terms of weight, it can also match the transportation tools for existing standard containers, which is beneficial to improving the problem of overloading in transportation, 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 dimension of the corresponding standard container for sea or land transportation in the first direction of the container during transportation, which is beneficial to improving the convenience during the transportation of the container; on the other hand, by arranging the control module and the thermal management module in the box body, the space inside the container can be fully utilized, with high integration, which is beneficial to improving the assembly efficiency and facilitating the use by customers.

[0082] In a third aspect of the embodiments of the present application, an energy storage system is provided, including a power conversion device and the above-mentioned energy storage device, and the power conversion device is used for electrically connecting a power generation device and the energy storage device.

[0083] The energy storage device of the energy storage system provided by the embodiment of the present application sets the size of the container in the first direction to be smaller than that of a standard container in the first direction. On the one hand, by reducing the size of the container, the weight of the container can be made smaller than that of a standard container, so that a standard spreader can be matched. That is, while meeting the requirement that the weight does not exceed the transportation and road limits, it can also match the transportation tools for existing standard containers, which is beneficial to improving the problem of overweight transportation, reducing the transportation costs of the container and the energy storage device using the container, and thus reducing the usage cost of the energy storage device. On the other hand, the container does not exceed the size of the corresponding standard container for sea or land transportation in the first direction of the container during transportation, which is beneficial to improving the convenience during container transportation. On the further hand, by setting a control module, the control module can control the electrical energy input or output of the battery cell to achieve electrical control of the battery cell. By setting a 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 yet another hand, by arranging the control module and the thermal management module in the box body, the space inside the container can be fully utilized, with high integration, which is beneficial to improving the assembly efficiency and facilitating customer use.

[0084] The fourth aspect of the embodiment of the present application provides a charging network, including a charging pile and the above-mentioned energy storage device or the above-mentioned energy storage system, and the energy storage device is used to provide electrical energy for the charging pile.

[0085] The energy storage device of the charging network provided by the embodiment of the present application sets the size of the container in the first direction to be smaller than that of a standard container in the first direction. On the one hand, by reducing the size of the container, the weight of the container can be made smaller than that of a standard container, so that a standard spreader can be matched. That is, while meeting the requirement that the weight does not exceed the transportation and road limits, it can also match the transportation tools for existing standard containers, which is beneficial to improving the problem of overweight transportation, reducing the transportation costs of the container and the energy storage device using the container, and thus reducing the usage cost of the energy storage device. On the other hand, the container does not exceed the size of the corresponding standard container for sea or land transportation in the first direction of the container during transportation, which is beneficial to improving the convenience during container transportation. On the further hand, by setting a control module, the control module can control the electrical energy input or output of the battery cell to achieve electrical control of the battery cell. By setting a 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 yet another hand, by arranging the control module and the thermal management module in the box body, the space inside the container can be fully utilized, with high integration, which is beneficial to improving the assembly efficiency and facilitating customer use. Description of the Drawings

[0086] Figure 1Schematic diagram of the charging network provided by an embodiment of the present application;

[0087] Figure 2 Schematic diagram of the energy storage system provided by an embodiment of the present application;

[0088] Figure 3 Schematic diagram of the energy storage device provided by the first embodiment of the present application;

[0089] Figure 4 For Figure 3 Schematic diagram of the structure of the container in;

[0090] Figure 5 Layout diagram of the energy storage device provided by the first embodiment of the present application;

[0091] Figure 6 Schematic diagram of the energy storage device provided by the second embodiment of the present application, wherein the container includes a first container and a second container;

[0092] Figure 7 For Figure 6 Schematic diagram of the structure of the first container in;

[0093] Figure 8 For Figure 6 Schematic diagram of the structure of the second container from the first perspective in;

[0094] Figure 9 For Figure 6 Schematic diagram of the structure of the second container from the second perspective in;

[0095] Figure 10 Layout diagram of the energy storage device provided by the second embodiment of the present application;

[0096] Figure 11 Schematic diagram of the energy storage device provided by the third embodiment of the present application, wherein the container includes a first container and a second container;

[0097] Figure 12 Schematic diagram of the control module provided by an embodiment of the present application;

[0098] Figure 13 Schematic diagram of the structure of the cooperation between two adjacent containers of an energy storage device provided by an embodiment of the present application.

[0099] Description of reference numerals

[0100] 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 member; 311, Limiting groove; 4, Second container; 41, Second limiting member; 411, Limiting hole; 42, Limiting pin; 43, Support member; 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, Vent; 16, Maintenance door; 17, First wire passing hole; 18, Second wire passing hole; 19, Floor drain; 20, Thermal management module; 30, Control module; 301, Main control module; 302, Power distribution module; 303, Total control module; 304, Fire control module; 200, Charging pile; 300, Power conversion device; 3000, Power generation device. Detailed implementation manners

[0101] If there is no special instruction, all implementation manners and optional implementation manners of this application can be combined with each other to form a new technical solution.

[0102] If there is no special instruction, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0103] With the development of clean energy, more and more devices use electric energy as the driving energy. As a result, power batteries that can store a large amount of electric energy and can be charged and discharged repeatedly have developed rapidly, such as lithium-ion batteries. Among them, power batteries are not only applied to energy storage power systems such as hydraulic, thermal, wind, and solar power stations, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as many fields such as aerospace.

[0104] In the embodiments of this application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0105] 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-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc. The embodiments of this application do not limit this.

[0106] A 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 charge and discharge process of the battery cell, active ions (such as lithium ions) are inserted into and extracted from between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent short circuit between the positive and negative electrodes and allow active ions to pass through.

[0107] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0108] As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is disposed on either or both of the two opposite surfaces of the positive electrode current collector.

[0109] As an example, the positive electrode current collector may be made of a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as the metal foil, pure metals, alloys, and metals with surface treatment can be used, including but not limited to stainless steel, copper, aluminum, nickel, nickel, titanium, or silver, etc. The composite current collector may include a polymer material substrate layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as substrates of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0110] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials can also be used.

[0111] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0112] As an example, the negative electrode current collector may be made of a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as the metal foil, pure metals, alloys, and metals with surface treatment can be used, including but not limited to stainless steel, copper, aluminum, nickel, nickel, titanium, or silver, etc. The composite current collector may include a polymer material substrate layer and a metal layer. The composite current collector can be formed by forming a metal material (such as copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as substrates of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0113] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0114] In some embodiments, the material of the positive current collector may be aluminum, and the material of the negative current collector may be copper.

[0115] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0116] In some embodiments, the separator is a separator membrane. The present application does not particularly limit the type of the separator membrane, and any well-known porous structure separator membrane with good chemical stability and mechanical stability can be selected.

[0117] As an example, the main material of the separator membrane may be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics. The separator membrane may be a single-layer film or a multi-layer composite film, without particular limitation. When the separator membrane is a multi-layer composite film, the materials of each layer may be the same or different, without particular limitation. The separator may be a single component located between the positive and negative electrodes, or may be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating may also be coated on the surface of the separator membrane.

[0118] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously functions to transport ions and isolate the positive and negative electrodes.

[0119] In some embodiments, the battery cell further includes an electrolyte, which functions to conduct ions between the positive and negative electrodes. The present application does not specifically limit the type of the electrolyte, and it can be selected according to requirements. The electrolyte may be liquid, gel-like, or solid.

[0120] The electrode assembly may be a wound structure, a stacked structure, or a hybrid structure of winding and stacking.

[0121] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0122] In some embodiments, the electrode assembly is a stacked structure.

[0123] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be respectively provided, and the plurality of positive electrode sheets and the plurality of negative electrode sheets are alternately stacked.

[0124] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet is folded to form a plurality of stacked folding segments, and a positive electrode sheet is clamped between adjacent folding segments.

[0125] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folding segments.

[0126] As an example, a plurality of separators may be provided, which are respectively disposed between any adjacent positive electrode plates or negative electrode plates.

[0127] As an example, the separators may be continuously provided and disposed between any adjacent positive electrode plates or negative electrode plates by folding or winding.

[0128] In some embodiments, the shape of the electrode assembly may be cylindrical, flat, prismatic, or the like.

[0129] In some embodiments, the electrode assembly is provided with tabs, and the tabs can conduct current out of the electrode assembly. The tabs include positive tabs and negative tabs.

[0130] In some embodiments, the battery cell may include a housing. The housing may 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 may 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 a sealed bag is further included between the housing and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag may be a bag-shaped insulating member or an aluminum plastic film. When the housing is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0131] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc., and there is no particular limitation in this application.

[0132] In some embodiments, the housing includes an end cap and a housing body. The housing body is provided with an opening, and the end cap covers the opening. The housing body may be provided with one or more openings. One or more end caps may also be provided.

[0133] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal may be directly connected to the tab or indirectly connected to the tab through a current collector member. The electrode terminal may be provided on the end cap or on the housing body.

[0134] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0135] Power stations have increasingly higher requirements for the areal energy density of energy storage containers. Therefore, in order to increase the power, the weight of the container will also increase accordingly. And the container needs to be transported from the production site to the use site by land transportation and / or sea transportation. Usually, there are weight limits for land transportation and sea transportation. Therefore, there is a contradiction between the improvement of the energy density and the weight of the energy storage container.

[0136] In view of this, an embodiment of the present application proposes a new technical solution. The technical solution described in the embodiment of the present application is applicable to containers and energy storage devices including containers.

[0137] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, 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 low electricity consumption periods and provide electrical energy to relevant users or electrical equipment during high electricity consumption periods. The energy storage system provided by the embodiment of the present application can be any power system that requires an energy storage device.

[0138] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a charging network provided by an embodiment of the present application. An embodiment of the present application provides a charging network 1000. The charging network 1000 includes a charging pile 200, and the charging pile 200 is used to charge electrical equipment. The charging network 1000 may further include an energy storage device 100 or an energy storage system 2000. The energy storage device 100 is electrically connected to the charging pile 200, and the energy storage device 100 is used to provide electrical energy to the charging pile 200.

[0139] It should be noted that the charging pile 200 is electrically connected to the battery cell 2 in the energy storage device 100 through a cable, and the battery cell 2 can provide the electrical energy stored in itself to the charging pile 200. The charging pile 200 has one or more connectors, and the connectors are used to connect to electrical equipment (such as a vehicle), so as to replenish energy to the electrical equipment. The application of the energy storage device 100 in the charging network 1000 can effectively improve the reliability of the charging network 1000 and also help to improve the flexibility of the charging network 1000 during deployment.

[0140] The energy storage device 100 can be located inside the charging pile 200 (such as an integrated charging and energy storage machine) or outside the charging pile 200.

[0141] In a charging network 1000, there can be one charging pile 200, and the energy storage device 100 provides electrical energy for one charging pile 200; there can also be multiple charging piles 200, and the energy storage device 100 provides electrical energy for multiple charging piles 200.

[0142] The energy storage device 100 may include a container 10. The container 10 includes a box body 1 and battery cells 2. The battery cells 2 are electrically connected to the charging pile 200 so that the battery cells 2 can provide electrical energy to the charging pile 200.

[0143] As an example, such as Figure 1As shown, the charging network 1000 includes an energy storage device 100 and two charging piles 200. One energy storage device 100 supplies electric energy to the two charging piles 200.

[0144] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of an energy storage system provided by an embodiment of the present application. An embodiment of the present application provides an energy storage system 2000. The energy storage system 2000 includes a power conversion device 300. The power conversion device 300 can be electrically connected to a power generation device 3000 and an energy storage device 100 to convert the electric power provided by the power generation device 3000. The power conversion device 300 stores the electric energy provided by the power generation device 3000 into the energy storage device 100 after power conversion.

[0145] The power conversion device is used to be connected between the power generation device 3000 and the energy storage device 100. The power generation device 3000 is used to generate electric energy, and the power generation device 3000 is used to store the electric energy generated by it into the energy storage device 100 through the power conversion device. The energy storage system 2000 applying the energy storage device 100 can effectively improve the operation reliability of the energy storage system 2000. In specific implementation, the power generation equipment can specifically be a solar panel, a hydraulic power generation equipment, a thermal power generation equipment, etc. Among them, the specific type of the power generation equipment is not limited in the present application.

[0146] As an example, as Figure 2 shown, the energy storage system 2000 includes an energy storage device 100 and a power conversion device 300. Two power generation devices 3000 respectively transmit the generated electric energy to the power conversion device 300, and the electric energy is introduced into the energy storage device 100 through the power conversion device 300 for storage.

[0147] Please refer to Figures 3 to 12 , some embodiments of the present application provide an energy storage device. The energy storage device 100 includes a container 10, a control module 30, and a thermal management module 20. There are m containers 10, m≥2, and the m containers 10 are arranged along the first direction of the container 10. In the first direction, the size of the container 10 is smaller than that of a standard container 10. The container 10 includes a box body 1 and battery cells 2. There are multiple battery cells 2, and the multiple battery cells 2 are accommodated in the box body 1. The control module 30 is arranged in the box body 1, and the control module 30 is used to perform electrical control on the multiple battery cells 2 of the m containers 10. The thermal management module 20 is arranged in the box body 1, and the thermal management module 20 is used to manage the temperature of the multiple battery cells 2 of the m containers 10.

[0148] The standard container 10 can be the size of a standard container 10 during transportation, such as 20-foot, 30-foot, 40-foot or 45-foot, which meets the corresponding standards, and its length, width and height respectively have corresponding sizes.

[0149] The 20-foot container may include: the dimension in the length direction is 6058 mm, with a tolerance of 0 mm - 6 mm; the dimension in the width direction is 2438 mm, with a tolerance of 0 mm - 5 mm; and the dimension in the height direction is 2896 mm, 2591 mm or not greater than 2438 mm; the tolerance is 0 mm - 5 mm.

[0150] The 30-foot container may include: the dimension in the length direction is 9125 mm, with a tolerance of 0 mm - 10 mm; the dimension in the width direction is 2438 mm, with a tolerance of 0 mm - 5 mm; and the dimension in the height direction is 2896 mm, 2591 mm or not greater than 2438 mm; the tolerance is 0 mm - 5 mm.

[0151] The 40-foot container may include: the dimension in the length direction is 12192 mm, with a tolerance of 0 mm - 10 mm; the dimension in the width direction is 2438 mm, with a tolerance of 0 mm - 5 mm; and the dimension in the height direction is 2896 mm, 2591 mm or not greater than 2438 mm; the tolerance is 0 mm - 5 mm.

[0152] The 45-foot container may include: the dimension in the length direction is 13716 mm, with a tolerance of 0 mm - 10 mm; the dimension in the width direction is 2438 mm, with a tolerance of 350 mm - 5 mm; and the dimension in the height direction is 2591 mm or 2896 mm; the tolerance is 0 mm - 5 mm.

[0153] Optionally, for the container 10 of various sizes, the sizes within the range of ±1%, ±2%, ±3%, ±4%, ±5% of its size can be regarded as the sizes within the tolerance range.

[0154] The container 10 is generally of a cuboid structure. The length direction and the width direction of the container 10 are both 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 Figure 3 and Figure 6 shown, 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.

[0155] Exemplarily, the first direction is the length direction, the width direction or the height direction of the container 10. In the embodiments of the present application, the first direction is taken as the height direction for description.

[0156] Please refer to Figure 8 and Figure 9, the dimension a of the container 10 in the length direction is the distance between the two ends of the container 10 in the length direction; the dimension b of the container 10 in the width direction is the distance between the two ends of the container 10 in the width direction; the dimension h of the container 10 in the height direction is the distance between the two ends of the container 10 in the height direction. The above dimensions a, b, and h are the maximum dimensions of the outer contour of the container 10 in the corresponding directions. The box body 1 of the container 10 may 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, and the eight corner fittings protrude from the box walls of the box body 1 respectively. The total span of the two corner fittings arranged in the height direction is the height of the container 10, the total span of the two corner fittings arranged in the length direction is the length of the container 10, and the total span of the two corner fittings arranged in the width direction is the width of the container 10. When calculating the dimensions of the container 10, the pipelines and cables connected to the container 10 and located outside the container 10 are not counted as the dimensions of the container 10.

[0157] The number of containers 10 in the energy storage device 100 can be any number more than two. For example, the energy storage device 100 includes two containers 10, and the two containers 10 are stacked in the height direction; for another example, the energy storage device 100 includes three containers 10, and the three containers 10 are stacked in the height direction. It can be understood that when the number of containers 10 in the energy storage device 100 is too large, it is easy to cause damage to the box body 1 at the bottom. The sum of the heights of all the containers 10 stacked in the height direction is less than or equal to the sum of the heights of eight standard containers 10 stacked.

[0158] It can be understood that m is a positive integer.

[0159] Here, the control module 30 is arranged in the box body 1 means that part of the box body 1 may be provided with the control module 30, and the other part of the box body 1 may not be provided with the control module 30. It may also be that all of the box bodies 1 are provided with the control module 30, or the same control module 30 is arranged in multiple box bodies 1.

[0160] Similarly, the thermal management module 20 is arranged in the box body 1 means that part of the box body 1 may be provided with the thermal management module 20, and the other part of the box body 1 may not be provided with the thermal management module 20. It may also be that all of the box bodies 1 are provided with the thermal management module 20.

[0161] The battery cells 2 can be placed in the box body 1. It can be that multiple battery cells 2 are directly placed in the box body 1 after being connected in series, parallel or in a hybrid connection; it can also be that multiple battery cells 2 are connected in series, parallel or in a hybrid connection and then placed in a containment box to form a battery device and then placed in the box body 1.

[0162] Here, by setting the dimension of the container 10 in the first direction to be smaller than that of a standard container 10 in the first direction, the container 10 does not exceed the height of the corresponding standard container 10 for sea or land transportation in the height direction of the container 10 during transportation, which is beneficial to improving the convenience during the transportation of the container 10 and reducing the transportation costs of the container 10 and the energy storage device 100 using the container 10.

[0163] For the energy storage device provided by the embodiment of the present application, by setting the dimension of the container 10 in the first direction to be smaller than that of a standard container 10 in the first direction. On the one hand, by reducing the dimension of the container 10, the weight of the container 10 can be made smaller than that of a standard container 10, so that a standard spreader can be matched. That is, under the condition of meeting the weight not exceeding the transportation and road limits, it can also match the transportation tools of the existing standard container 10, which is beneficial to improving the problem of overweight transportation and reducing the transportation costs of the container 10 and the energy storage device 100 using the container 10, thereby reducing the usage cost of the energy storage device 100. On the other hand, the container 10 does not exceed the dimension of the corresponding standard container 10 for sea or land transportation in the first direction of the container 10 during transportation, which is beneficial to improving the convenience during the transportation of the container 10. On the further hand, by setting the control module 30, the control module 30 can control the electrical energy input or output of the battery cell 2 to achieve the electrical control of the battery cell 2. By setting the thermal management module 20, the thermal management module 20 can manage the temperature of the battery cell 2 and reduce the risk of temperature runaway of the battery cell 2. On yet another hand, by arranging the control module 30 and the thermal management module 20 in the box body 1, the space inside the container 10 can be fully utilized, with high integration, which is beneficial to improving the assembly efficiency and facilitating the use by customers.

[0164] In addition, due to the dimension problem of the battery cell 2, there is an area at the edge of the box body 1 that cannot be filled with the battery cell 2, and by arranging the control module 30 and the thermal management module 20 in the box body 1, the space inside the box body 1 can be fully utilized, further improving the space utilization rate of the box body 1.

[0165] In some embodiments, please refer to Figure 3 and Figure 5 , the first direction is the height direction of the container 10. The dimension of the container 10 in its length direction is the same as that of the standard container 10 in the length direction, and the dimension of the container 10 in its width direction is the same as that of the standard container 10 in the width direction. The sum of the dimensions of m1 containers 10 in the height direction among m containers 10 is equal to the sum of the dimensions of n standard containers 10 in the height direction.

[0166] m1 of the m containers 10 refer to any m1 of the m containers 10. For example, an energy storage device 100 has three containers 10, namely a first container 3, a second container 4, and a third container. If m1 = 2, these 2 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.

[0167] It can be that m1 is less than m, and the sum of the dimensions of some of the m containers 10 in the height direction is equal to the sum of the dimensions of n standard containers 10 in the height direction. For example, m = 8, m1 = 5, n = 3; among them, the 5 containers 10 can be any 5 of the 8 containers 10.

[0168] It can also be that m1 = m, and the sum of the dimensions of the m containers 10 in the height direction is equal to the sum of the dimensions of n standard containers 10 in the height direction. For example, m = 2, and the sum of the heights of the two containers 10 is equal to the height of one standard container 10.

[0169] It can be understood that m, m1, and n are all positive integers.

[0170] Here, the dimensions of the containers 10 in the height direction can be the same, and can be one m1 -th of the dimensions of n standard containers 10. That is, the sum of the dimensions of m1 containers 10 in the height direction is equal to the sum of the dimensions of n standard containers 10 in the height direction. In this way, when n = 1, m1 containers 10 can form the dimensions of 1 standard container 10, which is convenient for assembling into the dimensions of 1 standard container 10 for land transportation and sea transportation; when n is an integer greater than 1, m1 containers 10 can form the dimensions of n standard containers 10, and it is also convenient to transport in the dimensions of standard containers 10. When transporting in the dimensions of standard containers 10, the transportation cost can be greatly reduced.

[0171] Optionally, it can also be that the dimensions of the m containers 10 in the height direction are different, but at least the sum of the dimensions of m1 of the containers 10 in the height direction needs to be set to the sum of the dimensions of n standard containers 10 in the height direction. In this way, m1 of the containers 10 with different dimensions can also be assembled into the dimensions of 1 or more standard containers 10, which greatly facilitates transportation and reduces transportation costs.

[0172] In the embodiment of the present application, the sum of the dimensions of the m1 containers 10 in the height direction is equal to the sum of the dimensions of the n standard containers 10 in the height direction, which means that the sum of the dimensions of the m1 containers 10 in the height direction is approximately equal to the sum of the dimensions of the n standard containers 10 in the height direction. When the difference between the sum of the dimensions of the m1 containers 10 in the height direction and the sum of the dimensions of the n standard containers 10 in the height direction is within the above-mentioned tolerance range, the dimensions can be considered to be approximately equal.

[0173] Optionally, the approximately equal difference is W, where W ≤ m1×35mm-30mm. For example, if m1=2, the approximately equal difference W can be up to 40mm. When the difference between the sum of the heights of the two containers 10 and the size of one standard container 10 is within 40mm, the sum of the height dimensions of the two containers 10 is equal to the height dimension of one standard container 10. For another example, if m1=3, the approximately equal difference W can be up to 75mm. When the difference between the sum of the heights of the three containers 10 and the size of one standard container 10 is within 75mm, the sum of the height dimensions of the three containers 10 is equal to the height dimension of one standard container 10; or when the difference between the sum of the heights of the three containers 10 and the size of two standard containers 10 is within 75mm, the sum of the height dimensions of the three containers 10 is equal to the sum of the height dimensions of two standard containers 10.

[0174] Optionally, due to manufacturing errors, the sum of the dimensions of the m1 containers 10 may have m1 manufacturing errors W1, where W1 ≤ 5 mm. That is, the sum of the dimensions of the m1 containers 10 along the height direction is equal to the sum of the dimensions of the n standard containers 10 along the height direction. Alternatively, the sum of the dimensions of the m1 containers 10 along the height direction plus m1 W1 equals the sum of the dimensions of the n standard containers 10 along the height direction. As an example, m1 = 2, n = 1, the height h of each container 10 is 1293 mm, and the corresponding height H of the standard container 10 is 2591 mm. n × H - m1 × h = 5 mm, and 5 mm < m1 × W1 = 10 mm; therefore, the sum of the dimensions of the m1 containers 10 along the height direction is equal to the sum of the dimensions of the n standard containers 10 along the height direction.

[0175] In some embodiments, see Figures 1 to 8 ,as well as Figure 11, the energy storage device 100 further includes a connection mechanism (not shown in the figure), and the connection mechanism is configured to be able to connect two adjacent containers 10 in the height direction of the container 10. Among them, the connection mechanism includes a support member 43, and the support member 43 is arranged between two adjacent containers 10 in the height direction. The sum of the dimensions of m1 containers 10 in the height direction among the m containers 10 and the sum of the dimensions of m1 - 1 support members 43 in the height direction are equal to the sum of the dimensions of n standard containers 10 in the height direction.

[0176] Optionally, between the containers 10 assembled and transported in the height direction, they are connected and fixed by the support member 43. Then, the dimensions of m1 containers 10 forming n standard containers 10 also include the height dimensions of the support members 43 between them. That is to say, when the support member 43 is set, the dimensions of some of the m1 containers 10 in the height direction can be the sum of its own height and the height of the support member 43 connected to it. Because the support member 43 connecting the containers 10 in the height direction also occupies a certain height dimension of the container 10 to some extent.

[0177] Exemplarily, when all m1 containers 10 are assembled, fixed, and transported through the support member 43, the sum of the dimensions of m1 containers 10 in the height direction and the sum of the dimensions of m1 - 1 support members 43 in the height direction are equal to the sum of the dimensions of n standard containers 10 in the height direction. Optionally, the number of support members 43 between m1 containers 10 can be less than m1 - 1. Then, when these containers 10 are assembled into the dimensions of a standard container 10, it includes the sum of the dimensions of m1 containers 10 and the actual dimensions of the support members 43.

[0178] Connecting the containers 10 through the connection mechanism can make the stacking of the containers 10 more stable. When the containers 10 are transported, the sum of the dimensions of m1 containers 10 in the height direction plus the sum of the dimensions of the support members 43 in the height direction arranged between two adjacent containers 10 among the m1 containers 10 is equal to the sum of the heights of n standard containers 10, which can efficiently utilize the transportation space occupied by the containers 10 and save transportation costs.

[0179] Exemplarily, among them, the dimension of the support member 43 is W2, and W2 ≤ 30 mm. As an example, m1 = 3, n = 2, the height h of the container 10 is 845 mm, the height H of the corresponding standard container 10 is 2591 mm, n×H - m1×h = 56 mm, 56 mm < m1×W1 + (m1 - 1)×W2 = 75 mm; Therefore, the sum of the dimensions of m1 20 containers 10 in the height direction is equal to the sum of the dimensions of n standard containers 10 in the height direction. Among them, W = m1×W1 + (m1 - 1)×W2.

[0180] Thus, for the energy storage device 100 according to the embodiments of the present application, when the support member 43 is used during transportation, and when there is no need for the support member 43 between the containers 10 that make up the energy storage device 100, "the sum of the dimensions of the m1 containers 10 in the height direction is equal to the sum of the dimensions of the n standard containers 10 in the height direction" should be understood to include the height of the support member 43 used. That is to say, the sum of the dimensions of the m1 containers 10 in the height direction is equal to the sum of the dimensions of the n standard containers 10 in the height direction minus the sum of the heights of the support members 43 used. Such a situation also belongs to the situation of the embodiments of the present application.

[0181] In this embodiment, by setting the dimension of the container 10 in the height direction to be smaller than the dimension of a standard container in the height direction, the container 10 does not exceed the height of the corresponding standard container 10 in the height direction of the container 10 during transportation, which is beneficial to improving the convenience during the transportation of the container 10. The dimension of the container 10 in the length direction and the dimension of the container 10 in the width direction are both the same as those of the standard container 10, so that the horizontal area occupied by the container 10 during transportation is the same as that of the standard container 10. The sum of the dimensions of the m1 containers 10 in the height direction is the same as the sum of the dimensions of the n standard containers 10 in the height direction, which can make the space occupied by the m1 containers 10 when stacked the same as the space occupied by the n standard containers 10, improving the utilization rate of the space for placing the containers 10, being beneficial to making full use of the available space in the height direction during transportation, reducing the space waste during the transportation of the container 10, reducing the transportation cost of the container 10 and the energy storage device 100 using the container 10, and thus reducing the use cost of the energy storage device 100. Stacking the containers 10 can also reduce the floor area and save space.

[0182] In some embodiments, please refer to Figure 11 and Figure 12 , the control module 30 includes a main control module 301, a power distribution module 302, a general control module 303, and a fire control module 304. The battery cell 2 is electrically connected to the main control module 301. The main control module 301 is electrically connected to the general control module 303. The main control module 301, the general control module 303, and the fire control module 304 are all electrically connected to the power distribution module 302.

[0183] The main control module 301 is used to control the input and output of the high-voltage electric energy of the battery cells 2 in the container 10. The general control module 303 is used to control the switching action of the main control module 301 in the container 10. The fire control module 304 is used to control the action of the fire-fighting components when a fire occurs due to temperature imbalance in the container 10. The fire-fighting components can be fire extinguishers, etc., and the fire-fighting components can be arranged in the container 10. The power distribution module 302 is used to electrically connect the main control module 301, the general control module 303, and the fire control module 304, so as to facilitate the conduction of the circuits of the main control module 301, the general control module 303, and the fire control module 304, and maintain the normal operation of the main control module 301, the general control module 303, and the fire control module 304.

[0184] Exemplarily, please refer to Figures 3 to 5 , each container 10 is provided with a control module 30. That is to say, the control module 30 corresponds to the container 10 one by one. One control module 30 corresponds to controlling the input and output of the electric energy of the battery cells 2 in one container 10. In this way, it is beneficial to realize the electrical control of the control module 30 over the battery cells 2.

[0185] Exemplarily, please refer to Figures 6 to 10 , some containers 10 are provided with a control module 30, and some other containers 10 are not provided with a control module 30. That is to say, one control module 30 corresponds to controlling the input or output of the electric energy of the battery cells 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. This control module 30 corresponds to controlling the input or output of the electric energy of the battery cells 2 in the two containers 10.

[0186] Of course, it is also possible that one container 10 has multiple control modules 30. One container 10 can have multiple battery cells 2. Multiple battery cells 2 are connected in series to form a battery cluster, and multiple battery clusters are connected in parallel. One control module 30 can correspond to controlling one or more battery clusters.

[0187] The thermal management module 20 includes a heat exchange unit. The heat exchange unit is, for example, a water-cooled unit. The thermal management module 20 can exchange heat with the battery cells 2 through a heat exchange pipeline (such as a water-cooled pipeline), so as to realize the management of the temperature of the battery cells 2 and reduce the risk of temperature runaway of the battery cells 2.

[0188] Exemplarily, please refer to Figures 3 to 5 , each container 10 is provided with a thermal management module 20. That is to say, the thermal management module 20 corresponds to the container 10 one by one. One thermal management module 20 corresponds to managing the temperature of the battery cells 2 in one container 10.

[0189] Exemplarily, please refer to Figures 6 to 10 , some of the containers 10 are provided with a thermal management module 20, and some of the containers 10 are not provided with a thermal management module 20. That is to say, one thermal management module 20 corresponds to managing the temperatures of the battery cells 2 in multiple containers 10. For example, when the number of containers 10 is two, one of the containers 10 is provided with a thermal management module 20, and the other container 10 is not provided with a thermal management module 20. The thermal management module 20 can exchange heat with the battery cells 2 in the two containers 10 through a heat exchange pipeline (such as a water-cooling pipeline), that is, the thermal management module 20 can correspond to managing the temperatures of the battery cells 2 in the two containers 10.

[0190] Please refer to Figures 3 to 10 , an embodiment of the present application provides a container 10, which includes a box body 1 and battery cells 2. There are multiple battery cells 2, and the multiple battery cells 2 are accommodated in the box body 1. And the container 10 can be used to accommodate at least one of a control module 30 and a thermal management module 20.

[0191] In some embodiments, m1 = 2 and n = 1.

[0192] It may be that the energy storage device 100 includes more than two containers 10. For example, the number of containers 10 in the energy storage device 100 is 3, 5, or 8. It may also be that there are only two containers 10 in the energy storage device 100.

[0193] By setting the height of two containers 10 to be the height of one standard container 10, when transporting multiple containers 10 in the energy storage device 100, two adjacent containers 10 can be stacked along 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 placement of the containers 10 and facilitating the reduction of the transportation cost of the containers 10.

[0194] In some embodiments, m1 = 3 and n = 1.

[0195] By setting the height of three containers 10 to be the height of one standard container 10, when transporting multiple containers 10 in the energy storage device 100, three adjacent containers 10 can be stacked along 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 placement of the containers 10 and facilitating the reduction of the transportation cost of the containers 10.

[0196] In some embodiments, m1 = 3 and n = 2.

[0197] By setting the height of three containers 10 to be the height of two standard containers 10, when transporting multiple containers 10 in the energy storage device 100, three adjacent 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, improving the space utilization rate of the placement of the containers 10 and facilitating the reduction of the transportation cost of the containers 10.

[0198] In some embodiments, refer to Figures 3 to 10 , at least part of the interior of the box body 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 accommodated in the battery compartment 11, and the control module 30 and / or the thermal management module 20 are accommodated in the control compartment 12, and the length direction intersects with the first direction.

[0199] Exemplarily, the first direction can be the height direction, and the length direction intersects with the first direction.

[0200] There are various ways to arrange the battery compartment 11 and the control compartment 12 along the length direction of the container 10.

[0201] 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 to say, the battery compartments 11 are arranged on both sides of the control compartment 12 along the length direction of the container 10, that is, the control compartment 12 can be arranged between the two battery compartments 11. In this way, the control module 30 and / or the thermal management module 20 in the control compartment 12 can be connected to the battery compartments 11 on both sides of the container 10 in the length direction through shorter lines or pipelines.

[0202] Exemplarily, a partition member (not shown in the figure) is arranged between the battery compartment 11 and the control compartment 12. The partition member is beneficial to improving the structural strength of the box body 1, and is also beneficial to improving the sealing performance and heat preservation performance of the battery compartment 11.

[0203] The heat exchange pipeline and the connection wire harness are hermetically penetrated through the partition member. 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 (such as a water cooling pipeline), and the control module 30 in the control compartment 12 can perform electrical control on the battery cells 2 in the battery compartment 11 through the connection wire harness.

[0204] Exemplarily, refer to Figures 3 to 10 , the battery compartment 11 and the control compartment 12 are arranged in sequence along the length direction of the container 10. That is to say, the control compartment 12 can be arranged at the end of the container 10. In this way, while improving the space utilization rate of the container 10, it is also beneficial to repair the control components arranged in the control compartment 12 from the end of the container 10. In addition, if the container 10 is symmetrically arranged at the same time, it can be placed in a grid pattern (such asFigure 5 and Figure 10 As shown, it improves the utilization rate of the space for placing the container 10, reduces the land waste of the traditional container 10 that must reserve a maintenance passage of more than 3 m between each container 10. Only a normal paint repair passage needs to be reserved between the cross-shaped containers 10, which improves the user's land investment income and the energy income per unit area of the user.

[0205] Here, the control module 30 and / or the thermal management module 20 being accommodated in the control bin 12 means that it can be the control module 30 being accommodated in the control bin 12, or the thermal management module 20 being accommodated in the control bin 12, or both the control module 30 and the thermal management module 20 being accommodated in the control bin 12.

[0206] In this embodiment, by arranging the battery bin 11 and the control bin 12 along the length direction of the container 10, the control module 30 and / or the thermal management module 20 in the control bin 12 can be connected to the battery bins 11 on both sides of the length direction of the container 10 with shorter lines or pipelines; while improving the space utilization rate of the container 10, it is also beneficial to repair the control components arranged in the control bin 12 from the end of the container 10. In addition, if the container 10 is symmetrically arranged at the same time, it can be placed in a cross shape, which improves the utilization rate of the space for placing the container 10, reduces the land waste of the traditional container 10 that must reserve a maintenance passage of more than 3 m between each container 10. Only a normal paint repair passage needs to be reserved between the cross-shaped containers 10, which improves the user's land investment income and the energy income per unit area of the user.

[0207] In some embodiments, please refer to Figures 3 to 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. The first top wall 13 and at least one first side wall 14 are provided with ventilation openings 15 for ventilation of the thermal management module 20.

[0208] It can be the entire surface of the first top wall 13 being open to form a ventilation opening 15, or it can be a partial opening of the first top wall 13 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 a part of the first top wall 13 forms a ventilation opening 15.

[0209] It can be that all the first side walls 14 are provided with ventilation openings 15, or only a part of the first side walls 14 are provided with ventilation openings 15.

[0210] In this embodiment, the ventilation openings 15 are located on the first top and the first side walls 14 of the bin body, which is beneficial to the heat dissipation of the thermal management module 20, enabling the thermal management module 20 to have more heat dissipation channels and improving the temperature control effect of the thermal management module 20.

[0211] In some embodiments, referring to Figures 3 to 5 , at least part of the box body 1 includes an isolation layer 123, and the isolation layer 123 divides the control bin 12 into a first bin 121 and a second bin 122. 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.

[0212] Exemplarily, the first bin 121 and the second bin 122 may be stacked 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. It may be that the first bin 121 and the second bin 122 share the first side wall 14, and a ventilation opening 15 is provided on the first side wall 14 at the location of the first bin 121.

[0213] The first bin 121 being located at the top of the control bin 12 allows the thermal management module 20 to be located at the top of the control bin 12, with no obstruction above the thermal management module 20, which is beneficial to the heat dissipation of the thermal management module 20. The first bin 121 is separated from the second bin 122 by the isolation layer 123, and the isolation layer 123 can separate the thermal management module 20 and the control module 30, which can reduce the interference of the thermal management module 20 on the control module 30, that is, it can reduce the electromagnetic interference of high-voltage lines on low-voltage ones, and can also reduce the influence of external rainfall or sunlight exposure on the control module 30.

[0214] Here, the isolation layer 123 may be a metal plate.

[0215] In this embodiment, the isolation layer 123 separates the thermal management module 20 and the control module 30, reducing the risk of interference between the thermal management module 20 and the control module 30, thereby improving the reliability of the energy storage device 100.

[0216] In some embodiments, referring to Figures 3 to 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 on the front side of the second bin 122.

[0217] It may be that the first bin 121 and the second bin 122 share the first side wall 14 and the first top wall 13, and ventilation openings 15 are provided on the first side wall 14 and the first top wall 13 at the location of the first bin 121.

[0218] The first bin 121 is arranged on the front side of the second bin 122, with no obstruction above and on the side of the thermal management module 20, which is beneficial to the heat dissipation of the thermal management module 20.

[0219] In this embodiment, the first compartment 121 is disposed on the front side of the second compartment 122, that is, the first compartment 121 is disposed on the side of the box body 1 close to the battery compartment 11 door, and the inlet and outlet of the heat exchange pipeline are also disposed on the side of the box body 1 close to the battery compartment 11 door. In this way, it is beneficial to the connection between the thermal management module 20 and the heat exchange pipeline, and can also reduce the number of elbows of the heat exchange pipeline, thereby reducing the flow resistance and improving the temperature control effect of the thermal management module 20.

[0220] In some embodiments, please refer to Figure 3 and Figure 4 , the second compartment 122 has a first compartment door 124, and the first compartment door 124 is disposed on the side of the second compartment 122 facing away from the battery compartment 11.

[0221] The first compartment door 124 is disposed on the side of the second compartment 122 facing away from the battery compartment 11, that is, the first compartment door 124 may be a part of the first side wall 14.

[0222] In this embodiment, the first compartment door 124 can be used to open or close the second compartment 122, and can be used to repair the control module 30 disposed in the second compartment 122, reducing the land waste of the traditional container 10 that must reserve a maintenance passage of more than 3 m between each container 10. Only a normal paint repair passage needs to be reserved between the grid containers 10, which improves the land investment income of the user and the energy income per unit area of the user.

[0223] In some embodiments, please refer to Figures 6 to 10 , a plurality of containers 10 include a first container 3 and a second container 4. The first container 3 is located above the second container 4, and the thermal management module 20 is accommodated in the control compartment 12 of the first container 3, and the control module 30 is accommodated in the control compartment 12 of the second container 4.

[0224] The first container 3 and the second container 4 are stacked along the height direction, and the first container 3 is located above the second container 4.

[0225] The first container 3 being located above the second container 4 can make the thermal management module 20 located at the top of the energy storage device 100, and there is no obstruction above the thermal management module 20, which is further beneficial to the heat dissipation of the thermal management module 20. And the thermal management module 20 and the control module 30 can be further separated, which can reduce the interference of the thermal management module 20 to the control module 30.

[0226] In this embodiment, by accommodating 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. In addition, the thermal management module 20 is located in the upper first container 3, which further facilitates the heat dissipation of the thermal management module 20, enabling the thermal management module 20 to have more heat dissipation channels and improving the temperature control effect of the thermal management module 20.

[0227] In some embodiments, referring to Figures 6 to 10 , the control compartment 12 of the second container 4 has a first hatch 124, and the first hatch 124 is provided on the side of the control compartment 12 facing away from the battery compartment 11.

[0228] The first hatch 124 is provided on the side of the control compartment 12 of the second container 4 facing away from the battery compartment 11, that is, the first hatch 124 can be a part of the first side wall 14.

[0229] In this embodiment, the first hatch 124 can be used to open or close the control compartment 12 of the second container 4 and can be used for maintenance of the control module 30 arranged in the second compartment 122, reducing the waste of land for traditional containers 10 that must reserve a maintenance passage of more than 3 m between each container 10. Only a normal touch-up and maintenance passage needs to be reserved between the Tian-character grid containers 10, which improves the user's land investment return and the user's energy return per unit area.

[0230] In some embodiments, referring to Figure 8 , a first wire passing hole 17 is provided at the top of the control compartment 12.

[0231] Exemplarily, referring to Figure 9 , a second wire passing hole 18 is provided at the bottom of the control compartment 12.

[0232] To facilitate the rapid installation at the customer site, the control module 30 and the thermal management module 20 are integrated inside the container 10. After the containers 10 are stacked on site, they can be connected to the PCS and EMS, which is beneficial to reducing the workload of on-site assembly, improving the assembly efficiency, and facilitating the customer's use.

[0233] The PCS (Power Conversion System) can control the charging and discharging processes of the battery, perform AC / DC conversion, and directly supply power to AC loads in the absence of a power grid. The PCS consists of a DC / AC bidirectional converter, a control unit, etc. The PCS controller receives the background control instructions through communication, and controls the converter to charge or discharge the battery according to the sign and magnitude of the power instruction, realizing the regulation of the active power and reactive power of the power grid. The PCS controller communicates with the BMS through the CAN interface, obtains the state information of the battery pack, and can realize the protective charging and discharging of the battery.

[0234] The EMS (Energy Management System) is a collection of software and hardware used to monitor, control, analyze, and optimize energy systems. It realizes the efficient management and optimal allocation of energy through real-time monitoring and intelligent control of all links in energy production, distribution, and consumption.

[0235] In this embodiment, a second wire passing hole 18 is provided at the bottom of the control bin 12. The wire harnesses connected to the PCS and the EMS enter the second bin 122 through the first wire passing hole 17 of the upper container 10, are connected to the control module 30, and then are led out of the container 10 through the second wire passing hole 18 of the upper container 10. Then, they can enter the second bin 122 through the first wire passing hole 17 of the lower container 10, be connected to the control module 30, and then be led out of the container 10 through the second wire passing hole 18 of the lower container 10.

[0236] In some embodiments, please refer to Figures 1 to 8 , the container 10 further includes a sealing plate 5 (not shown in the figure), and the sealing plate 5 is detachably arranged at the first wire passing hole 17.

[0237] The sealing plate 5 is detachably arranged at the first wire passing hole 17 for selectively opening or closing the first wire passing hole 17.

[0238] The first wire passing hole 17 of the container 10 is provided with a detachable sealing plate 5, and the sealing plate 5 is hermetically connected to the container 10. When the container 10 is placed at the bottom layer, the upper sealing plate 5 needs to be removed in advance, and when placed at the top layer, the sealing plate 5 does not need to be removed.

[0239] In this embodiment, by providing the sealing plate 5, while not affecting the passing of the wire harness, it is also beneficial to improve the sealing performance of the container 10.

[0240] In some embodiments, please refer to Figures 6 to 10 , the container 10 further includes an auxiliary power wire harness, and the auxiliary power wire harness enters the control bin 12 through the second wire passing hole 18 and is electrically connected to the control module 30 and / or the thermal management module 20.

[0241] Here, the auxiliary power harness being electrically connected to the control module 30 and / or the thermal management module 20 means that the auxiliary power harness can be electrically connected to the control module 30, or to the thermal management module 20, or to both the control module 30 and the thermal management module 20.

[0242] In this embodiment, by electrically connecting the auxiliary power harness to 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.

[0243] In some embodiments, refer to Figure 9 , a floor drain 19 is provided at the bottom of the battery compartment 11.

[0244] In this embodiment, by providing the floor drain 19 at the bottom of the battery compartment 11, it is beneficial for the condensed water to be discharged out of the battery compartment 11 through the floor drain 19.

[0245] In some embodiments, the dimensional ratio of the control compartment 12 to the battery compartment 11 in the length direction is 0.03 - 0.18.

[0246] For example, it is 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.

[0247] Here, the control compartment 12 and the battery compartment 11 are arranged along the length direction of the container 10. Thus, the smaller the dimensional ratio of the control compartment 12 to the battery compartment 11 in the length direction, the larger the size of the battery compartment 11, which is beneficial to improving the energy density of the energy storage device 100; the larger the dimensional ratio of the control compartment 12 to the battery compartment 11 in the length direction, the larger the size of the control compartment 12, which is convenient for the assembly of the control module 30 and the thermal management module 20.

[0248] In this embodiment, by setting the dimensional ratio of the control compartment 12 to the battery compartment 11 in the length direction to 0.03 - 0.18, it is beneficial to improve the energy density of the energy storage device 100 while also facilitating the assembly of the control module 30 and the thermal management module 20.

[0249] In some embodiments, the dimension of the control compartment 12 in the length direction is 200 mm - 1000 mm.

[0250] For example, it is 200mm, 250mm, 280mm, 300mm, 330mm, 350mm, 380mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, 700mm, 750mm, 780mm, 800mm, 850mm, 900mm, 950mm, 1000mm, and so on.

[0251] In this embodiment, by setting the dimension of the control bin 12 in the length direction to be 200mm - 1000mm, it is beneficial to improve the energy density of the energy storage device 100 while also facilitating the assembly of the control module 30 and the thermal management module 20.

[0252] In some embodiments, please refer to Figures 8 to 10 , the battery bin 11 has a second bin door 111. The box body 1 has an inspection door 16, and the second bin door 111 and the inspection door 16 are located on the same side along the width direction of the container 10.

[0253] One of the wall parts provided on both sides of the container 10 along the width direction is the wall part where the second bin door 111 and the inspection door 16 are opened. By opening the second bin door 111, battery cells 2 can be filled into or taken out of the container 10 when the second bin door 111 is opened. When the second bin door 111 is closed, the second bin door 111 can separate the battery cells 2 from the outside world, reducing the risk of the outside environment interfering with the battery cells 2. The inspection door 16 is opened on the same side as the second bin door 111. By opening the inspection door 16, it is convenient to perform maintenance on the main control module 301 located in the control bin 12.

[0254] By providing the inspection door 16 on the container 10, it is beneficial to perform maintenance on the main control module 301 along the width direction, making the maintenance of the main control module 301 more convenient.

[0255] In some embodiments, please refer to Figure 11 , at least part of the container 10 includes a first connector 6. The first connector 6 is electrically connected to the control module 30. Each container 10 includes a second connector 7. The second connector 7 is electrically connected to the battery cell 2. The first connector 6 is used to cooperate with each second connector 7.

[0256] That at least part of the container 10 includes a first connector 6 means that it can be that some of the containers 10 include a first connector 6 and some do not, or it can also be that all of the containers 10 include a first connector 6.

[0257] The first connector 6 and the second connector 7 can be directly connected to achieve the matching of the first connector 6 and the second connector 7. For example, the first connector 6 can be plugged into and matched 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 housing 1; the first connector 6 can be movably arranged on the control compartment 12, and the second connector 7 can be fixed on the housing 1; or the first connector 6 and the second connector 7 can be movably arranged on the control compartment 12 and the housing 1, respectively. The first connector 6 can include multiple connecting parts, and the connecting parts correspond to and are connected to the second connectors 7 one by one to achieve the connection between the first connector 6 and multiple second connectors 7.

[0258] Exemplarily, the first connector 6 is provided on a partition of the control compartment 12 .

[0259] Alternatively, the first connector 6 and the second connector 7 may be connected via a connector, which may be a cable. Alternatively, the first connector 6 and the second connector 7 may be fixed to the housing 1, respectively; the first connector 6 may be fixed to the housing 1, and the second connector 7 may be movably mounted on the housing 1; the first connector 6 may be movably mounted on the housing 1, and the second connector 7 may be fixed to the housing 1; or the first connector 6 and the second connector 7 may be movably mounted on the housing 1.

[0260] As an example, the first connector 6 is fixed to the control compartment 12, and the two second connectors 7 are fixed to the two boxes 1 respectively. The first connector 6 and the second connector 7 are connected by a cable. The cable can be a quick-connect cable with quick-connect connectors at both ends of the cable, and the two quick-connect connectors are connected to the first connector 6 and the second connector 7 respectively.

[0261] In the embodiment in which the first connector 6 and the second connector 7 are connected by a cable, the cable may be at least partially passed through the interior of the container 10, or part of the cable may be passed through to the outside of the container 10; the interface of the first connector 6 may be located outside the control compartment 12, and all the cables may be located outside the control compartment 12; or the interface of the second connector 7 may be located outside the box 1, and all the cables may be located outside the box 1.

[0262] In this embodiment, the first connector 6 cooperates with each second connector 7 to achieve a quick connection between the control module 30 and the battery cell 2 , making the connection between the control module 30 and the battery cell 2 more convenient.

[0263] In some embodiments, see Figure 11, the container 10 includes a plurality of battery devices, and each battery device includes a thermal management component and a plurality of battery cells 2. At least a part of the container 10 includes a third connector 8, and each container 10 includes a fourth connector 9. The third connector 8 communicates with the thermal management module 20, and the fourth connector 9 communicates with the thermal management component. The third connector 8 is used to cooperate with each fourth connector 9.

[0264] The statement that at least a part of the container 10 includes a third connector 8 means that it can be that some of the containers 10 include a third connector 8 while the other part of the containers 10 do not include a third connector 8, or it can also be that all of the containers 10 include a third connector 8.

[0265] In some embodiments, the plurality of battery cells 2 are arranged to form a battery cell assembly.

[0266] As an example, the battery cell assembly can be a battery module. The battery module is formed by arranging and fixing a plurality of battery cells 2 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 2 with cable ties.

[0267] It can be that the third connector 8 directly communicates with the fourth connector 9 to achieve the cooperation between the third connector 8 and the fourth connector 9. For example, the third connector 8 is inserted and mated with each fourth connector 9. Among them, it can be that the third connector 8 is fixed to the control compartment 12 and the fourth connector 9 is movably arranged on the box body 1; it can also be that the third connector 8 is movably arranged on the control compartment 12 and the fourth connector 9 is fixedly arranged on the box body 1; it can also be that the third connector 8 and the fourth connector 9 are respectively movably arranged on the control compartment 12 and the box body 1. The third connector 8 can include a plurality of connecting parts, and the connecting parts correspond to and are connected to the fourth connector 9 one by one to achieve the communication between the third connector 8 and the plurality of fourth connectors 9.

[0268] Exemplarily, the third connector 8 is, for example, arranged on the partition of the control compartment 12.

[0269] It can also be that the third connector 8 and the fourth connector 9 are communicated through a connecting piece, and the connecting piece can be a pipeline. Among them, it can be that the third connector 8 and the fourth connector 9 are respectively fixed to the control compartment 12 and the box body 1; it can also be that the third connector 8 is fixed to the control compartment 12 and the fourth connector 9 is movably arranged on the box body 1; it can also be that the third connector 8 is movably arranged on the control compartment 12 and the fourth connector 9 is fixedly arranged on the box body 1; it can also be that the third connector 8 and the fourth connector 9 are respectively movably arranged on the control compartment 12 and the box body 1.

[0270] As an example, the third connector 8 is installed on the thermal management module 20, and the fourth connector 9 is installed on each container 10. The third connector 8 and the fourth connector 9 are connected through a pipeline. The pipeline can be a quick-connect pipeline, and both ends of the pipeline have quick-connect joints. The first connector 6 and the second connector 7 are also quick-connect joints respectively. The two quick-connect joints at both ends of the pipeline are respectively connected to the first connector 6 and the second connector 7.

[0271] In this embodiment, the cooperation of the third connector 8 and the fourth connector 9 can achieve the quick connection of the thermal management component and the thermal management module 20, which is convenient for the installation of the thermal management module 20.

[0272] In some embodiments, the weight of a single battery cell 2 is 5 kg to 60 kg.

[0273] The weight of a single battery cell 2 can be a point value of any one of 5 kg, 10 kg, 15 kg, 20 kg, 25 kg, 30 kg, 35 kg, 40 kg, 45 kg, 50 kg, 55 kg, 60 kg or a point value between any two of them. As an example, the mass of a single battery cell 2 is 30 kg.

[0274] The weight of the battery cell 2 is appropriate so that an appropriate amount of battery cells 2 can be placed in the box body 1, and the energy density is moderate under the condition of meeting the transportation requirements.

[0275] In some embodiments, the weight of the container 10 is M, and M ≤ 35 tons.

[0276] Exemplarily, the weight of the container 10 can be a point value of any one of 10 tons, 15 tons, 20 tons, 25 tons, 30 tons, 35 tons or a point value between any two of them.

[0277] During the hoisting process of the container 10, it is convenient for the relevant hoisting devices to hoist and facilitate the transfer work of the container 10.

[0278] In some embodiments, the weight of the container 10 is M, and the total weight of the battery cells 2 in the box body 1 is M1, and (M1 / M)×100% ≥ 60%.

[0279] Exemplarily, (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.

[0280] Thus, on the one hand, the weight ratio of the battery cells 2 in the container 10 per unit volume can be increased, 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 of the transported battery cells 2 contribute to the energy storage capacity and are difficult to produce at the destination, while other structures can be produced near the destination without transportation or with reduced transportation. After the container 10 is assembled into the energy storage device 100, it is beneficial to reduce the transportation cost of the assembled energy storage device 100.

[0281] In some embodiments, (M1 / M)×100% ≥ 80%.

[0282] Exemplarily, (M1 / M)×100% can be 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89% or 90%, etc.

[0283] Thus, it is further beneficial to reduce the transportation cost of the assembled energy storage device 100.

[0284] In some embodiments, the weight of the container 10 is M, and a plurality of battery devices are arranged in the box body 1. The battery device includes a containing box and a plurality of battery cells 2, and the plurality of battery cells 2 are accommodated in the containing box. The total weight of the battery device is M2, and 70% ≤ (M2 / M)×100% ≤ 90%.

[0285] The containing box may include two parts that are covered with each other, such as an upper cover and a bottom plate, the upper cover and the lower box body 1, and the two parts together form a containing space for accommodating the battery cells 2. The thermal management component may be a part of the containing box or the thermal management component is located in the containing space.

[0286] (M2 / M)×100% can be any point value of 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90% or any point value between any two of them.

[0287] When (M2 / M)×100% ≥ 70%, the weight ratio of the battery cells 2 in the container 10 per unit volume can be increased, and the energy density of the container 10 can be improved; 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 and the structural strength of the container 10 can be taken into account, and the container 10 has stronger practicability.

[0288] In some embodiments, the volume of the container 10 is V, the total volume of the battery cells 2 in the box body 1 is V1, and (V1 / V)×100%≥30%.

[0289] The battery cell 2 includes a housing, and the volume of the battery cell 2 is the volume of the housing. For example, the battery cell 2 is a square shell battery cell 2, and the product of the length, width and height of the square shell battery cell 2 is the product of the length, width and height of the housing.

[0290] In an embodiment where the battery cell 2 further includes electrode terminals, the electrode terminals are arranged on the housing and partially protrude from the housing. The electrode terminals are electrically connected to the electrode assembly, and the part of the electrode terminals protruding from the housing is not counted as the volume of the battery cell 2.

[0291] (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%, etc.

[0292] On the one hand, the proportion of the volume of the battery cell 2 in the container 10 per unit volume can be increased, and the power of the container 10 per unit volume can be increased; on the other hand, during the transportation of the container 10, more of the battery cells 2 that contribute to the energy storage capacity and are difficult to produce at the destination are transported, while other functional elements of the energy storage device 100 such as control elements can be produced near the destination without transportation or with reduced transportation. After the container 10 is assembled into the energy storage device 100, it is beneficial to reduce the transportation cost of the assembled energy storage device 100.

[0293] In some embodiments, (V1 / V)×100%≥50%.

[0294] (V1 / V)×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.

[0295] It is further beneficial to reduce the transportation cost of the assembled energy storage device 100.

[0296] In some embodiments, the volume of the container 10 is V, and a plurality of battery devices are arranged in the box body 1. The battery device includes a receiving box and a plurality of battery cells 2. The plurality of battery cells 2 are received in the receiving box. The total volume of the battery device is V2, and 50%≤(V2 / V)×100%≤80%.

[0297] The volume of the battery cell 2 is the volume of the accommodation box. For example, the accommodation box has a cuboid structure, and the volume of the battery cell 2 is equal to the product of the length, width, and height of the accommodation box.

[0298] (V2 / V)×100% can be a point value of any one of 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 75%, 80% or a point value between any two of them.

[0299] When (V2 / V)×100%≥50%, the volume ratio of the battery cell 2 in the container 10 per unit volume can be increased, and the energy density of the container 10 can be improved; when (V2 / V)×100%≤80%, there can be a sufficient volume of structural members in the container 10 to maintain the structural strength of the container 10. Therefore, when 50%≤(V2 / V)×100%≤80%, the energy density and structural strength of the container 10 can be taken into account, and the practicability of the container 10 is stronger.

[0300] In some embodiments, the energy of the container 10 is E, the dimension of the box body 1 along the length direction of the container 10 is a, the dimension of the box body 1 along the width direction of the container 10 is b, 250KW / m 2 ≤E / (a×b)≤700KW / m 2 .

[0301] E / (a×b) can be 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 a point value of any one of them or a point value between any two of them.

[0302] The energy E can be obtained from the nameplate of the container 10.

[0303] When E / (a×b)≥250 KW / m 2 it is possible to make the container 10 have a relatively large energy density and improve the practicality of the container 10; when E / (a×b)≤700 KW / m 2 it is possible to reduce the risk that the large mass of the container 10 crushes other containers 10 and facilitate the transportation of the container 10. Therefore, when 250 KW / m 2 ≤E / (a×b)≤700 KW / m 2 it takes into account the energy density of the container 10 and the mass setting of the container 10, improves the practicality of the container 10, and also facilitates the transportation of the container 10.

[0304] In some embodiments, 450 KW / m 2 ≤E / (a×b)≤600 KW / m 2 .

[0305] E / (a×b) can be 450 KW / m 2 , 455 KW / 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 or the point value between any two of them.

[0306] As an example, E / (a×b) = 490 KW / m 2 . It can further improve the energy density of the container 10 and the mass setting of the container 10 and facilitate the transportation of the container 10.

[0307] In some embodiments, along the height direction of the container 10, two adjacent containers 10 are welded, snapped, locked or connected by fixing members.

[0308] The fixing member can be at least one of a bolt and nut, a pin, a screw, a rivet, etc. Of course, the fixing member can also include a fixing plate, etc., to fixedly connect two adjacent containers 10 in the height direction.

[0309] It is provided that two adjacent containers 10 in the height direction are connected by a fixing member, and the fixing member can be used to limit the two adjacent containers 10 in the height direction, which is beneficial to reducing the risk of mutual displacement of the two adjacent containers 10 after stacking is completed, and thus is beneficial to improving the structural stability of the energy storage device 100.

[0310] In some embodiments, please refer to Figures 3 to 10 and Figure 13 , a plurality of containers 10 include a first container 3 and a second container 4. The first container 3 is located above the second container 4. A limiting pin 42 is provided at the bottom of the first container 3, and a limiting hole 411 is provided at the top of the second container 4. The limiting pin 42 is engaged with the limiting hole 411.

[0311] If the container 10 includes a first container 3 and a second container 4, then the same container 10 is the first container 3 relative to the container 10 below it, and is the second container 4 relative to the container 10 above it. That is, a container 10 can be both the first container 3 and the second container 4. In other words, a limiting pin 42 can be provided at the bottom of a container 10, and a limiting hole 411 can be provided at its top.

[0312] In this way, two adjacent containers 10 in the height direction are matched by the limiting pin 42 and the limiting hole 411, and a simple structure is used to achieve the purpose of restricting the relative displacement of the two adjacent containers 10.

[0313] The limiting hole 411 at the top of the second container 4 can be an opening for hoisting the container 10. In this way, during the hoisting stage of the container 10, the container 10 is hoisted by using the opening, and after the hoisting of the container 10 is completed, the opening at the top of the box body 1 is matched with the limiting pin 42 at the bottom of the adjacent upper container 10 to realize the limiting of the two adjacent containers 10. In this way, it is beneficial to simplify the structure of the container 10.

[0314] In some embodiments, and Figure 13 , a first limiting member 31 is provided at the bottom of the first container 3. The first limiting member 31 is provided with a limiting groove 311. A second limiting member 41 is provided at the top of the second container 4. The second limiting member 41 is provided with a limiting hole 411. Two ends of the limiting pin 42 are respectively engaged with the limiting groove 311 and the limiting hole 411.

[0315] The second limiting member 41 may be the aforementioned hoisting portion, and the limiting hole 411 may be the aforementioned opening. The limiting hole 411 may also be a hole provided in the box body 1 of the container 10.

[0316] In this embodiment, during the stacking process of the containers 10 in the height direction, the limiting pin 42 cooperates with the limiting groove 311 of the upper container 10 among two adjacent containers 10, and cooperates with the limiting hole 411 of the lower container 10 among two adjacent containers 10. Thus, with a simple structure, the purpose of restricting the relative movement of two adjacent containers 10 is achieved.

[0317] In some embodiments, along the height direction of the container 10, the heights of some of the m containers 10 are not equal to the heights of some other containers 10.

[0318] Thus, it is convenient to improve the flexibility of the capacity of the container 10 to match different requirements.

[0319] In some embodiments, the dimensions of the m containers 10 along the height direction of the container 10 are equal.

[0320] Thus, it is convenient to simplify the manufacturing process and reduce costs.

[0321] In some embodiments, the first direction is the height direction of the container 10, 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.

[0322] The sum of the dimensions of m1 containers 10 along the height direction is 2896 mm, 2591 mm or 2438 mm, which is the height of the 20-foot standard container 10.

[0323] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. An energy storage device, characterized in that, include: Containers, wherein there are m containers, 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 that of a standard container; the container includes a box body and a battery cell, wherein the battery cell is multiple and the multiple battery cells are accommodated in the box body; a control module, disposed in the box, for electrically controlling the plurality of battery cells in the m containers; A thermal management module is disposed in the box, and is used to manage the temperatures of the multiple battery cells in the m containers.

2. The energy storage device according to claim 1, characterized in that, Each of the containers is provided with the control module; or, some of the containers are provided with the control module, while the other part of the containers are not provided with the control module.

3. The energy storage device according to claim 1, characterized in that, Each of the containers is provided with the thermal management module; or, some of the containers are provided with the thermal management module, while the other containers are not provided with the thermal management module.

4. The energy storage device according to claim 1, characterized in that The first direction is the length direction, width direction or height direction of the container.

5. The energy storage device according to claim 1, characterized in that, The first direction is the height direction of the container, the size of the container along its length direction is consistent with the size of the standard container along its width direction, and the size of the container along its width direction is consistent with the size of the standard container. The sum of the sizes of m1 of the m containers along the height direction is equal to the sum of the sizes of n standard containers in the height direction.

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

7. The energy storage device according to claim 1, characterized in that, At least part of the interior of the box body has a battery compartment and a control compartment, and the battery compartment and the control compartment are arranged along the length direction of the container. Multiple battery cells are accommodated in the battery compartment, and the control module and / or the thermal management module are accommodated in the control compartment. The length direction intersects with the first direction.

8. The energy storage device according to claim 7, wherein At least part of the box includes an isolation layer, which separates the control compartment into a first compartment and a second compartment. The first compartment and the second compartment share the isolation layer. The first compartment is used to accommodate the thermal management module, and the second compartment is used to accommodate the control module.

9. The energy storage device according to claim 8, characterized in that, The first warehouse and the second warehouse are arranged along the width direction of the container, and the first warehouse is arranged in front of the second warehouse.

10. The energy storage device according to claim 8, wherein 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.

11. The energy storage device according to claim 7, characterized in that, The multiple containers include a first container and a second container, the first container is located above the second container, the thermal management module is accommodated in the control compartment of the first container, and the control module is accommodated in the control compartment of the second container.

12. The energy storage device according to claim 11, wherein 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.

13. The energy storage device according to claim 7, characterized in that, The box body includes a first top wall and a plurality of first side walls arranged around the first top wall. The first top wall and at least one of the first side walls are provided with ventilation holes, and the ventilation holes are used for ventilation of the thermal management module.

14. The energy storage device according to claim 7, characterized in that, A first wire passing hole is provided at the top of the control bin; and / or, a second wire passing hole is provided at the bottom of the control bin.

15. The energy storage device according to claim 14, wherein, The container further includes a sealing plate, and the sealing plate is detachably arranged at the first wire passing hole.

16. The energy storage device according to claim 14, characterized in that, The container further includes an auxiliary power harness, and the auxiliary power harness enters the control bin through the second wire passing hole and is electrically connected to the control module and / or the thermal management module.

17. The energy storage device according to claim 7, characterized in that, A floor drain is provided at the bottom of the battery bin.

18. The energy storage device according to claim 7, characterized in that, The size ratio of the control bin to the battery bin in the length direction is 0.03 - 0.

18.

19. The energy storage device according to claim 7, characterized in that, The size of the control bin in the length direction is 200 mm - 1000 mm.

20. The energy storage device according to claim 7, wherein The battery bin has a second hatch; the box body has a maintenance door, and the second hatch and the maintenance door are on the same side along the width direction of the container.

21. The energy storage device according to claim 1, wherein, At least part of the container includes a first connector, the first connector is electrically connected to the control module, each container includes a second connector, the second connector is electrically connected to a battery cell, and the first connector is used to cooperate with each second connector.

22. The energy storage device according to claim 1, wherein, The container includes a plurality of battery devices, and each battery device includes a thermal management component and a plurality of the battery cells; At least part of the container includes a third connector, each container includes a fourth connector, the third connector communicates with the thermal management module, the fourth connector communicates with the thermal management component, and the third connector is used to cooperate with each fourth connector.

23. The energy storage device according to claim 1, characterized in that, The control module includes a main control module, a power distribution module, a general control module and a fire control module. The battery cell is electrically connected to the main control module, the main control module is electrically connected to the general control module, and the main control module, the general control module and the fire control module are all electrically connected to the power distribution module.

24. The energy storage device according to any one of claims 1-23, characterized in that, The weight of a single battery cell is 5 kg to 60 kg.

25. The energy storage device according to any one of claims 1-23, characterized in that, The weight of the container is M, and M ≤ 35 tons.

26. The energy storage device according to any one of claims 1-23, characterized in that, The weight of the container is M, and the total weight of the battery cells in the box body is M1, and (M1 / M)×100% ≥ 60%.

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

28. The energy storage device according to any one of claims 1-23, characterized in that, The weight of the container is M, and a plurality of battery devices are arranged in the box body. The battery device includes a containing box and a plurality of the battery cells. The plurality of battery cells are accommodated in the containing box. The total weight of the battery device is M2, and 70% ≤ (M2 / M)×100% ≤ 90%.

29. The energy storage device according to any one of claims 1-23, characterized in that, The volume of the container is V, and the total volume of the battery cells in the box body is V1, and (V1 / V)×100% ≥ 30%.

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

31. The energy storage device according to any one of claims 1-23, characterized in that, The volume of the container is V, and a plurality of battery devices are arranged in the box body. The battery device includes a containing box and a plurality of battery cells. The plurality of battery cells are accommodated in the containing box. The total volume of the battery device is V2, and 50% ≤ (V2 / V)×100% ≤ 80%.

32. The energy storage device according to any one of claims 1-23, characterized in that, The energy of the container is E, the dimension of the box body along the length direction of the container is a, and the dimension of the box body along the width direction of the container is b, 250 KW / m 2 ≤ E / (a × b) ≤ 700 KW / m 2 .

33. The energy storage device according to claim 32, wherein, 450KW / m 2 ≤E / (a×b)≤600KW / m 2 。 34. The energy storage device according to any one of claims 1-23, characterized in that Along the height direction of the container, two adjacent containers are welded, clamped, locked or connected by fixing parts.

35. The energy storage device according to claim 1, wherein, A plurality of the containers include a first container and a second container. The first container is located above the second container. A limit pin is provided at the bottom of the first container, and a limit hole is provided at the top of the second container. The limit pin is snap-fitted with the limit hole.

36. The energy storage device according to claim 35, wherein A first limit member is provided at the bottom of the first container. The first limit member is provided with a limit groove. A second limit member is provided at the top of the second container. The second limit member is provided with the limit hole. Two ends of the limit pin are respectively snap-fitted with the limit groove and the limit hole.

37. The energy storage device according to claim 1, wherein, The energy storage device further includes a connection mechanism configured to be capable of connecting two adjacent containers along the height direction of the container. Wherein, the connection mechanism includes a support member disposed between two adjacent containers along the height direction. The sum of the dimensions of m1 containers among the m containers along the height direction and the sum of the dimensions of m1 - 1 support members along the height direction is equal to the sum of the dimensions of n standard containers in the height direction.

38. The energy storage device according to claim 1, wherein, Along the height direction of the container, the heights of some of the m containers are not equal to the heights of the other part of the m containers; or the dimensions of the m containers along the height direction of the container are equal.

39. The energy storage device according to claim 1, 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, characterized in that, The container includes a box body and battery cells. There are a plurality of the battery cells, and the plurality of battery cells are accommodated in the box body; and the container can be used to accommodate at least one of a control module and a thermal management module.

41. An energy storage system includes a power conversion device and the energy storage device according to any one of claims 1 - 39. The power conversion device is used for electrically connecting a power generation device and the energy storage device.

42. A charging network includes a charging pile and the energy storage device according to any one of claims 1 - 39 or the energy storage system according to claim 41. The energy storage device is used to provide electric energy for the charging pile.

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