Container energy storage device

Abstract

A container energy storage device, comprising a box body (100), a battery pack (200), a thermal management mechanism (300) and a fire protection mechanism (400). The box body (100) is provided with a first chamber (100A), with a battery rack (110) mounted in the first chamber (100A). The battery pack (200) comprises a plurality of battery modules (210), the plurality of battery modules (210) being mounted on the battery rack (110). The thermal management mechanism (300) comprises a liquid cooling assembly (310), a ventilation assembly (320) and an air conditioner (330), wherein the liquid cooling assembly (310) is connected to the battery modules (210) and is configured to perform heat exchange with the battery modules (210); the ventilation assembly (320) is mounted on the box body (100) and is configured to exhaust hot air emitted by the battery pack (200) out of the box body (100); and the air conditioner (330) is mounted on the box body (100) and is configured to blow cold air into the first chamber (100A). The fire protection mechanism (400) is mounted on the box body (100) and is configured to cool down and extinguish fire when the battery modules (210) undergo thermal runaway.

Description

Containerized energy storage devices

[0001] This application claims priority to Chinese Patent Application No. 202411745407.7, filed with the Chinese Patent Office on November 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of energy storage equipment technology, such as a containerized energy storage device. Background Technology

[0003] Containerized energy storage units are a key component of power distribution networks, used to improve power quality. The core of a containerized energy storage unit is the energy storage battery, which consists of multiple battery modules installed within a container.

[0004] During the use of containerized energy storage devices, the battery cells expand with repeated charge-discharge cycles, leading to compression between the cells. Furthermore, when a cell is overcharged or short-circuited, the internal pressure increases, causing the cell to expand and compress. This compression between cells can cause the internal temperature to rise excessively, potentially leading to thermal runaway and posing a risk of fire or explosion. Therefore, current containerized energy storage devices suffer from low safety and poor stability. Summary of the Invention

[0005] This application provides a containerized energy storage device to solve the problems of low safety and poor stability of containerized energy storage devices.

[0006] This application provides a containerized energy storage device, including:

[0007] The housing has a first chamber, in which a battery rack is installed.

[0008] A battery pack, comprising multiple battery modules mounted on a battery rack, wherein the multiple battery modules are electrically connected to each other;

[0009] A thermal management mechanism, comprising a liquid cooling component, a ventilation component, and an air conditioner, wherein the liquid cooling component is connected to the plurality of battery modules and is configured to exchange heat with the plurality of battery modules; the ventilation component is installed in the housing and is configured to exhaust hot air emitted by the battery pack in the first chamber into the housing; the air conditioner is installed in the housing and is configured to blow cold air into the first chamber; and

[0010] A fire-fighting mechanism is installed in the enclosure and is configured to cool down and extinguish the fire in the event of thermal runaway of the battery pack.

[0011] In some embodiments, each battery module includes a base plate, a housing, an inverter, and a plurality of battery cells. The housing is connected to the base plate, and a receiving cavity is provided between the housing and the base plate. The plurality of battery cells are installed in the receiving cavity, and the inverter is installed on the base plate and electrically connected to the battery cells.

[0012] In some embodiments, the liquid cooling assembly includes a cooler, a heat exchanger, a first pipe, and a second pipe. The cooler is mounted on the outer side of the housing, the heat exchanger is mounted on the battery cell, the output port of the cooler is connected to a first end of the first pipe, the input port of the heat exchanger is connected to a second end of the first pipe, the output port of the heat exchanger is connected to a first end of the second pipe, and the input port of the cooler is connected to a second end of the second pipe. The cooler, the first pipe, the second pipe, and the heat exchanger are connected to form a loop, and a cooling medium is provided in the loop.

[0013] In some embodiments, the ventilation assembly includes a ventilation element and a cooling fan. The ventilation element is mounted on the side wall of the housing and has a ventilation opening. The first chamber is connected to the external environment through the ventilation opening, and the cooling fan is mounted on the inner side wall of the first chamber corresponding to the ventilation element.

[0014] In some embodiments, the air conditioner is installed in the housing, and the air conditioner includes an air outlet and a return air outlet. Both the air outlet and the return air outlet are connected to the first chamber. The air outlet is oriented toward the inverter, and the return air outlet is located above the air outlet.

[0015] In some embodiments, the battery packs include multiple battery packs, and an air duct is provided between two adjacent battery packs. The air conditioners include multiple air conditioners, and each air conditioner is configured in a one-to-one correspondence with an air duct.

[0016] In some embodiments, the fire-fighting mechanism includes an extinguishing agent storage tank, an extinguishing agent nozzle, a third pipeline, and a control valve. The extinguishing agent storage tank is installed in the housing, the extinguishing agent nozzle is installed on the inner wall of the first chamber, the extinguishing agent nozzle is connected to the extinguishing agent storage tank through the third pipeline, and the control valve is located in the third pipeline.

[0017] The fire protection system also includes a fire water interface, which is installed in the housing and connected to the first chamber. The fire water interface is configured to connect to an external fire pipe.

[0018] In some embodiments, the battery pack includes a first heat insulation plate, a second heat insulation plate, and a third heat insulation plate. The first heat insulation plate is mounted on the side of the battery rack and disposed between adjacent battery packs. The second heat insulation plate is mounted on the battery rack and disposed between adjacent battery modules. The third heat insulation plate is mounted inside each battery module and disposed on the side of the housing facing the battery cell.

[0019] In some embodiments, the battery rack includes multiple racks, each battery pack is placed in a corresponding rack, each battery rack has multiple placement positions, each placement position has a pulley system on both sides, and each battery module is movably disposed in the placement position via the pulley system.

[0020] In some embodiments, the containerized energy storage device further includes a controller, and the thermal management mechanism, the fire protection mechanism, and the plurality of battery modules are all electrically connected to the controller. Attached Figure Description

[0021] Figure 1 is a structural schematic diagram of a container energy storage device according to an embodiment of this application;

[0022] Figure 2 is a top view of the container energy storage device according to an embodiment of this application;

[0023] Figure 3 is a schematic diagram of the battery module of the container energy storage device according to an embodiment of this application;

[0024] Figure 4 is a schematic diagram of the structure of the third heat insulation plate of the container energy storage device according to an embodiment of this application;

[0025] Figure 5 is a schematic diagram of the internal structure of the battery module of the container energy storage device according to an embodiment of this application;

[0026] Figure 6 is a schematic diagram of a portion of the structure of the container energy storage device according to an embodiment of this application;

[0027] Figure 7 is a schematic diagram of the structure of the liquid cooling component in some embodiments of this application;

[0028] Figure 8 is a structural schematic diagram of the ventilation component of the container energy storage device according to an embodiment of this application.

[0029] Reference numerals: 100, Housing; 100A, First Chamber; 100B, Second Chamber; 110, Battery Rack; 111, Pulley Block; 120, Firewall; 200, Battery Pack; 210, Battery Module; 211, Battery Cell; 212, Base Plate; 213, Housing; 214, Converter; 215, Support Block; 216, Receiving Cavity; 220, Third Insulation Plate; 230, Second Insulation Plate; 240, First Insulation Plate; 300, Thermal Management Mechanism; 310, Liquid Cooling Component; 311, Refrigerator; 312, Heat Exchanger; 313, First Pipe; 314, Second Pipe; 320, Ventilation Component; 3210, Ventilation Opening; 321, Ventilation Component; 322, Cooling Fan; 330, Air Conditioner; 331, Air Outlet; 332, Air Return Opening; 400. Firefighting equipment; 410. Extinguishing agent nozzle; 420. Third pipeline; 430. Control valve; 500. Controller. Detailed Implementation

[0030] The specific embodiments of this application are described below with reference to the accompanying drawings. Many details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application.

[0031] In the description of this application, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise expressly defined.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., shall be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral part; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the meaning of the above terms in this application as appropriate.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or that the first feature is at a lower horizontal level than the second feature.

[0035] If an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] Referring to Figures 1 and 2, a structural schematic diagram of a containerized energy storage device according to an embodiment of this application is shown. The containerized energy storage device includes a container body 100, a battery pack 200, a thermal management mechanism 300, and a fire-fighting mechanism 400. The main body of the container body 100 is a cubic frame structure, and the surface of the frame structure is covered with a shell plate. The container body 100 has high strength, corrosion resistance, and good sealing performance.

[0037] The container 100 has a first chamber 100A and a second chamber 100B. The first chamber 100A is located on one side of the second chamber 100B. A battery rack 110 is installed in the first chamber 100A. The battery rack 110 has good shock resistance and heat dissipation design to ensure the stability and safety of the containerized energy storage device during operation. Personnel can perform operations such as starting, stopping, cooling, and fire extinguishing on the containerized energy storage device in the second chamber 100B.

[0038] For example, the main body of the battery rack 110 is a frame structure, and the battery rack 110 has multiple placement positions along the vertical direction.

[0039] The battery pack 200 includes multiple battery modules 210, which are mounted on the battery rack 110. The battery modules 210 and the battery rack 110 are arranged in a one-to-one correspondence, and the battery modules 210 are electrically connected to each other.

[0040] The thermal management mechanism 300 is configured to maintain the normal operating temperature of the equipment inside the energy storage container. The thermal management mechanism 300 includes a liquid cooling component 310, a ventilation component 320, and an air conditioner 330. The liquid cooling component 310 is connected to the battery module 210 and is configured to exchange heat with the battery module 210.

[0041] Ventilation assembly 320 is installed in housing 100 and is configured to exhaust hot air emitted by battery pack 200 in first chamber 100A outside housing 100.

[0042] Air conditioner 330 is installed in the housing 100 and is configured to blow cold air into the first chamber 100A.

[0043] The fire-fighting mechanism 400 is installed in the enclosure 100. The fire-fighting mechanism 400 is configured to cool down and extinguish the fire when the battery module 210 experiences thermal runaway.

[0044] The container energy storage device described in this application embodiment includes a battery rack 110 installed in the first chamber 100A of the container 100. The battery pack 200 includes multiple battery modules 210, which are installed on the battery rack 110. The battery modules 210 are connected to each other by at least one connection method, namely series and parallel, to form a battery pack 200 that meets the required voltage and capacity. The containerized energy storage unit is also equipped with a thermal management system 300, which includes a liquid cooling component 310, a ventilation component 320, and an air conditioning unit 330. The liquid cooling component 310 can directly exchange heat with the battery module 210 through a liquid cooling medium. The ventilation component 320 can be used to exhaust hot air from the first chamber 100A to the outside of the container 100. The air conditioning unit 330 can be used to blow cold air into the first chamber 100A to cool the internal environment of the first chamber 100A. The combined effect of the thermal management system 300 reduces the temperature of the battery module 210, preventing thermal runaway of the battery module 210 that could lead to serious accidents such as fire or explosion, and achieving effective heat dissipation management of the battery module 210. The containerized energy storage unit is also equipped with a fire-fighting system 400 to ensure effective cooling and fire suppression of the containerized energy storage unit in the event of thermal runaway and fire in the battery module 210.

[0045] The container energy storage device described in this application embodiment uses a liquid cooling component 310 in the thermal management mechanism 300 to exchange heat with the battery module 210, a ventilation component 320 to exhaust hot air from the first chamber 100A outside the container 100, and an air conditioner 330 to blow cold air into the first chamber 100A. The thermal management mechanism 300 works together to effectively manage the heat of the battery module 210. In addition, a fire-fighting mechanism 400 is set up to extinguish fires in the battery pack 200 that has experienced thermal runaway. This makes the operation of the container energy storage system safer and gives it the characteristics of good safety and high stability.

[0046] In an optional embodiment, as shown in FIG1, the shell plate of the enclosure 100 is a firewall 120, which can prevent the fire inside the first chamber 100A from spreading to other devices. Exemplarily, the firewall 120 can be made of weathering steel or aluminum alloy, which, in addition to being fireproof, can also resist the harsh outdoor natural environment, such as wind, rain, sand, dust, salt spray, etc., to ensure the normal operation of the internal equipment.

[0047] The common sizes of the 100-ton enclosure are 20 feet and 40 feet, among other standard specifications. Custom sizes are also available to meet the requirements of different energy storage capacities and application scenarios.

[0048] Referring to Figures 3 to 5, a structural schematic diagram of a container energy storage device according to an embodiment of this application is shown. In some embodiments, the battery module 210 includes a base plate 212, a housing 213, a converter 214, and a plurality of battery cells 211. The housing 213 is connected to the base plate 212, and a receiving cavity 216 is provided between the housing 213 and the base plate 212. The plurality of battery cells 211 are installed in the receiving cavity 216. The converter 214 is installed on the base plate 212 and is arranged on one side of the battery cells 211. The converter 214 is electrically connected to the battery cells 211.

[0049] For example, common types of battery cells 211 include lithium-ion cells, lead-acid cells, and flow cells. The shape of the battery cell 211 can be cylindrical, square, etc., and multiple battery cells 211 are arranged in a matrix within the accommodating cavity 216.

[0050] By placing the battery cell 211 within the accommodating cavity 216 formed by the base plate 212 and the housing 213, the entire battery module 210 can be easily assembled and disassembled on the battery rack 110. Furthermore, the housing 213 protects the internal battery cell 211 from impact if it falls, thus preventing safety accidents such as combustion or explosion caused by impact. The inverter 214 is electrically connected to the battery cell 211. The inverter 214 can efficiently and flexibly convert and control the DC power output from the battery module 210, connecting the battery module 210 to the DC bus or other DC loads to achieve stable power transmission and precise control.

[0051] In an exemplary embodiment, the converter 214 is a flexible DC-DC converter, which can flexibly control the charging and discharging process of the battery module 210. According to different application scenarios and requirements, the charging and discharging strategy can be adjusted to extend battery life and improve the overall performance of the battery energy storage system.

[0052] In an optional embodiment, as shown in Figures 1 and 2, the liquid cooling assembly 310 includes a cooler 311, a heat exchanger 312, a first pipe 313, and a second pipe 314. The cooler 311 is installed on the outer side of the housing 100, and the heat exchanger 312 is installed on the battery cell 211. The output port of the cooler 311 is connected to the first end of the first pipe 313, the input port of the heat exchanger 312 is connected to the second end of the first pipe 313, the output port of the heat exchanger 312 is connected to the first end of the second pipe 314, and the input port of the cooler 311 is connected to the second end of the second pipe 314. The cooler 311, the first pipe 313, the second pipe 314, and the heat exchanger 312 are connected to form a loop, and a cooling medium is provided in the loop.

[0053] In some embodiments, as shown in FIG6, the structure of the first pipe 313 and the second pipe 314 of the container energy storage device described in this application embodiment is illustrated. As shown in FIG7, the connection relationship between the various components of the liquid cooling assembly 310, namely the cooler 311, the heat exchanger 312, the first pipe 313, and the second pipe 314 is clearly shown.

[0054] To cool the battery cell 211, a heat exchanger 312 is connected to the battery cell 211, and a cooler 311 is installed outside the housing 100. Both the heat exchanger 312 and the cooler 311 are connected to a first pipe 313 and a second pipe 314 to form a circulation loop. The cooler 311 cools the cooling medium in the circulation loop and then transports it to the heat exchanger 312 through the first pipe 313. The cooling medium exchanges heat with the battery cell 211 through the heat exchanger 312 and then returns to the cooler 311 through the second pipe 314 to continue exchanging heat. This allows the heat from the battery cell 211 to be discharged into the external environment, achieving efficient heat dissipation of the battery cell 211. This method features good heat dissipation and improved safety.

[0055] In an optional embodiment, as shown in Figures 1 and 2, the ventilation assembly 320 includes a ventilation element 321 and a cooling fan 322. The ventilation element 321 is installed on the side wall of the housing 100 and has a ventilation opening 3210. The first chamber 100A is connected to the external environment through the ventilation opening 3210. The cooling fan 322 is installed on the inner side wall of the first chamber 100A corresponding to the ventilation element 321. By installing the ventilation element 321 on the side wall of the housing 100, the ventilation opening 3210 of the ventilation element 321 connects the first chamber 100A with the external environment. Then, the cooling fan 322 is set at the position corresponding to the ventilation opening 3210. The cooling fan 322 exhausts the hot air in the first chamber 100A to the external environment through the ventilation opening 3210, thereby reducing the ambient temperature inside the first chamber 100A and preventing heat accumulation in the first chamber 100A caused by the battery module 210 overheating, thus reducing the safety problems caused by the overheating of the battery module 210.

[0056] In some embodiments, as shown in FIG8, which illustrates a structural form of the ventilation component 320 of the container energy storage device in this application embodiment, the hot air in the first chamber 100A can be efficiently discharged outside the container 100, which helps to improve the efficiency of ventilation and heat dissipation.

[0057] In an exemplary embodiment, as shown in FIG1, the number of ventilation components 321 may be one or two, and the ventilation component 321 is provided with at least one of a rain shield and a dustproof net. By providing a rain shield and a dustproof net, the ventilation component 321 can not only ventilate, but also have rainproof and dustproof functions, preventing external rainwater and dust from entering the housing 100 and ensuring stable operation of the equipment.

[0058] In an optional embodiment, as shown in Figure 1, an air conditioner 330 is installed in the housing 100. The air conditioner 330 includes an air outlet 331 and a return air outlet 332, both of which are connected to the first chamber 100A. The air outlet 331 is positioned towards the inverter 214, and the return air outlet 332 is located above the air outlet 331. By configuring the air conditioner 330 to supply cool air into the first chamber 100A, the cool air cools the inverter 214, thereby reducing heat accumulation and mitigating safety issues caused by overheating of the battery module 210. Furthermore, by positioning the air outlet 331 of the air conditioner 330 at the bottom, the cool air can directly sink and remain in the first chamber 100A, while the rising hot air in the first chamber 100A is drawn into the air conditioner 330 by the return air outlet 332, forming a natural convection circulation and making the temperature stratification of the first chamber 100A more reasonable.

[0059] In some embodiments, the battery pack 200 includes multiple units, and an air duct is provided between two adjacent battery packs 200. The air conditioner 330 includes multiple units, and the air conditioner 330 is provided in a one-to-one correspondence with the air duct. By providing the air duct, the cold air from the air conditioner 330 is transferred to the rear of the battery pack 200 through the air duct, thereby reducing the overall temperature of the battery pack 200.

[0060] In some embodiments, the battery rack 110 may include multiple racks, with each battery pack 200 correspondingly placed in one rack 110. Each placement position is provided with a pulley assembly 111 on both sides, and the battery module 210 is movably disposed in the placement position via the pulley assembly 111. The battery module 210 is detachably mounted on the battery rack 110 via the pulley assembly 111, making the battery module 210 easy to install and remove.

[0061] In an optional embodiment, as shown in FIG2, the fire-fighting mechanism 400 includes a fire extinguishing agent storage container, a fire extinguishing agent nozzle 410, a third conduit 420, and a control valve 430. The fire extinguishing agent storage container is installed in the housing 100, the fire extinguishing agent nozzle 410 is installed on the inner wall of the first chamber 100A, the fire extinguishing agent nozzle 410 is connected to the fire extinguishing agent storage container through the third conduit 420, and the control valve 430 is located in the third conduit 420. Exemplarily, multiple fire extinguishing agent nozzles 410 are provided, and each fire extinguishing agent nozzle 410 corresponds to a battery pack 200. By setting the fire extinguishing agent nozzles 410, when a fire is detected in the battery module 210, the independently controlled fire extinguishing agent nozzle 410 above the corresponding battery pack 200 is activated, causing it to spray fire extinguishing agent to suppress explosion and extinguish fire in the battery pack 200. For example, the extinguishing agents are liquid nitrogen and carbon dioxide. Liquid nitrogen and carbon dioxide have good insulation and cooling properties, which can extinguish battery fires and electrical equipment fires and prevent reignition. In controlled use, liquid nitrogen can be used for extinguishing the fire, followed by carbon dioxide, to achieve the function of suppressing explosion and extinguishing fire, which has the characteristic of improving the safety of container energy storage devices.

[0062] In some embodiments, the extinguishing agent storage tank stores a specific extinguishing agent, such as dry powder, carbon dioxide, or liquid nitrogen, so that it can be quickly released for fire extinguishing operations in the event of a fire. In some embodiments, the extinguishing agent storage tank can be installed in a corner of the top of the housing 100. When a fire occurs, the high potential allows the extinguishing agent to flow more smoothly along the third pipe 420 to the extinguishing agent nozzle 410 under the influence of gravity, achieving efficient fire extinguishing. Moreover, the top corner location is relatively independent and less susceptible to interference from the operation and maintenance of other equipment, reducing the risk of damage to the storage tank. Furthermore, top installation facilitates external inspection and maintenance by personnel, allowing them to view the appearance and pressure indicators of the extinguishing agent storage tank without entering the interior, reducing maintenance difficulty and safety hazards.

[0063] In some embodiments, the fire-fighting mechanism 400 further includes a fire water interface installed in the housing 100 and connected to the first chamber 100A. The fire water interface is configured to connect to a fire-fighting pipeline. By providing the fire water interface, after using liquid nitrogen and carbon dioxide for fire extinguishing, if the battery temperature is detected to have not yet dropped to a predetermined temperature and may pose a danger, the fire water interface can be quickly and reliably connected to the fire water pipeline joint. This ensures that fire water can be quickly injected into the first chamber 100A of the housing 100 through the fire water interface, so that the battery pack 200 is partially submerged or sprayed with fire water, achieving a cooling effect, providing time for rescue, ensuring the safety of the battery pack 200 in the event of thermal runaway, and improving the safety of the device.

[0064] In some embodiments, the location of the fire water inlet can be set according to actual needs. For example, the fire water inlet can be located on the side wall near the door of the enclosure 100, a location that allows staff to quickly locate and connect to external fire pipes. In other embodiments, the fire water inlet can also be located at a position corresponding to a key fire-fighting area or at the bottom edge of the enclosure 100.

[0065] In an optional embodiment, as shown in FIG4, the battery pack 200 includes a first heat insulation plate 240, a second heat insulation plate 230, and a third heat insulation plate 220. The first heat insulation plate 240 is installed on the side of the battery rack 110 and is disposed between adjacent battery packs 200. The second heat insulation plate 230 is installed on the battery rack 110 and is disposed between adjacent battery modules 210. The third heat insulation plate 220 is installed inside the battery module 210 and is disposed on the side of the housing 213 facing the cell 211, that is, the third heat insulation plate 220 is disposed between the housing 213 and the cell 211. Moreover, a support block 215 is provided between the third heat insulation plate 220 and the cell 211, and the support block 215 is configured to support the third heat insulation plate 220. For example, the first heat insulation plate 240, the second heat insulation plate 230, and the third heat insulation plate 220 are all nano-heat insulation plates, which have good heat insulation and fire resistance performance. By setting the first heat insulation plate 240, the second heat insulation plate 230, and the third heat insulation plate 220, effective heat insulation treatment is achieved between adjacent battery packs 200, between adjacent battery modules 210, and inside the battery module 210. The good heat insulation performance helps to delay the spread of heat when the battery module 210 experiences faults such as thermal runaway, and can, to a certain extent, prevent the rapid diffusion of heat and gas, reduce the risk of safety accidents such as fires, and buy time for taking safety measures.

[0066] In an optional embodiment, the containerized energy storage device further includes a controller 500, a thermal management mechanism 300, a fire suppression mechanism 400, and each battery module 210 electrically connected to the controller 500. Exemplarily, the controller 500 is located within the second chamber 100B, allowing personnel to operate it from within the chamber to perform operations such as starting, stopping, cooling, or extinguishing fires on the containerized energy storage device. By connecting the controller 500 to each battery module 210, the status of the battery modules 210 can be detected. When an abnormal temperature value is detected in a battery module 210, the thermal management mechanism 300 adaptively adjusts the cooling intensity of the battery module 210, for example, by lowering the temperature of the air conditioner 330, lowering the temperature of the liquid cooling medium, and increasing the speed of the cooling fan 322, thus adaptively adjusting the temperature of the battery cells 211 to cool them to a target temperature within a predetermined time. If the temperature of the battery module 210 exceeds the threshold and thermal runaway occurs, the fire-fighting mechanism 400 can be automatically controlled to extinguish and cool the battery module 210, preventing the situation from deteriorating further and ensuring the safe and reliable operation of the container energy storage device.

[0067] The containerized energy storage device described in this application has the following beneficial effects:

[0068] 1. The thermal management mechanism 300 sets up a liquid cooling component 310 to exchange heat with the battery module 210. The ventilation component 320 exhausts the hot air in the first chamber 100A outside the container 100. The air conditioner 330 blows cold air into the first chamber 100A. The thermal management mechanism 300 works together to effectively manage the heat of the battery module 210. In addition, a fire-fighting mechanism 400 is set up to extinguish the fire in the battery pack 200 that has thermal runaway. This makes the operation of the container energy storage system safer and has the characteristics of good safety and high stability.

[0069] 2. The converter 214 can efficiently and flexibly convert and control the DC power output by the battery module 210, and is used to connect the battery module 210 to the DC bus or other DC loads to achieve stable power transmission and precise control.

Claims

1. A containerized energy storage device, comprising: The housing (100) has a first chamber (100A) and a battery rack (110) is installed in the first chamber (100A); A battery pack (200) includes a plurality of battery modules (210), which are mounted on the battery rack (110) and are electrically connected to each other. A thermal management mechanism (300) includes a liquid cooling component (310), a ventilation component (320), and an air conditioner (330). The liquid cooling component (310) is connected to the plurality of battery modules (210) and is configured to exchange heat with the plurality of battery modules (210). The ventilation component (320) is installed in the housing (100) and is configured to exhaust hot air emitted by the battery pack (200) in the first chamber (100A) into the housing (100). The air conditioner (330) is installed in the housing (100) and is configured to blow cold air into the first chamber (100A). as well as A fire-fighting mechanism (400) is installed in the housing (100) and is configured to cool down and extinguish the fire when the battery pack (200) experiences thermal runaway.

2. The containerized energy storage device according to claim 1, wherein: Each of the battery modules (210) includes a base plate (212), a housing (213), a converter (214), and a plurality of battery cells (211). The housing (213) is connected to the base plate (212). A receiving cavity (216) is provided between the housing (213) and the base plate (212). The plurality of battery cells (211) are installed in the receiving cavity (216). The converter (214) is installed on the base plate (212) and is electrically connected to the battery cells (211).

3. The containerized energy storage device according to claim 2, wherein: The liquid cooling assembly (310) includes a cooler (311), a heat exchanger (312), a first pipe (313), and a second pipe (314). The cooler (311) is installed on the outer side of the housing (100), and the heat exchanger (312) is installed on the battery cell (211). The output port of the cooler (311) is connected to the first end of the first pipe (313), the input port of the heat exchanger (312) is connected to the second end of the first pipe (313), the output port of the heat exchanger (312) is connected to the first end of the second pipe (314), and the input port of the cooler (311) is connected to the second end of the second pipe (314). The cooler (311), the first pipe (313), the second pipe (314), and the heat exchanger (312) are connected to form a loop, and a cooling medium is provided in the loop.

4. The containerized energy storage device according to claim 1, wherein: The ventilation assembly (320) includes a ventilation component (321) and a cooling fan (322). The ventilation component (321) is installed on the side wall of the housing (100) and has a ventilation opening (3210). The first chamber (100A) is connected to the external environment through the ventilation opening (3210). The cooling fan (322) is installed on the inner side wall of the first chamber (100A) corresponding to the ventilation component (321).

5. The containerized energy storage device according to claim 2, wherein: The air conditioner (330) includes an air outlet (331) and a return air outlet (332), both of which are connected to the first chamber (100A), and the air outlet (331) is positioned toward the inverter (214).

6. The containerized energy storage device according to claim 5, wherein: The battery pack (200) includes multiple units, and an air duct is provided between two adjacent battery packs (200). The air conditioner (330) includes multiple units, and the air conditioner (330) is provided in a one-to-one correspondence with the air duct.

7. The containerized energy storage device according to claim 1, wherein: The fire-fighting mechanism (400) includes an extinguishing agent storage tank, an extinguishing agent nozzle (410), a third pipe (420), and a control valve (430). The extinguishing agent storage tank is installed in the housing (100). The extinguishing agent nozzle (410) is installed on the inner wall of the first chamber (100A). The extinguishing agent nozzle (410) is connected to the extinguishing agent storage tank through the third pipe (420). The control valve (430) is located in the third pipe (420). The fire protection mechanism (400) also includes a fire water interface, which is installed in the housing (100) and connected to the first chamber (100A). The fire water interface is configured to connect to an external fire pipe.

8. The containerized energy storage device according to claim 2, wherein: The battery pack (200) includes a first heat insulation plate (240), a second heat insulation plate (230), and a third heat insulation plate (220). The first heat insulation plate (240) is installed on the side of the battery rack (110) and is disposed between adjacent battery packs (200). The second heat insulation plate (230) is installed on the battery rack (110) and is disposed between adjacent battery modules (210). The third heat insulation plate (220) is installed inside each battery module (210) and is disposed on the side of the housing (213) facing the cell (211).

9. The containerized energy storage device according to claim 6, wherein: The battery rack (110) includes multiple racks, and each battery pack (200) is placed in a corresponding rack (110). Each battery rack (110) has multiple placement positions, and each placement position has a pulley group (111) on both sides. Each battery module (210) is movably set in the placement position through the pulley group (111).

10. The container energy storage device according to claim 1 further includes a controller (500), wherein the thermal management mechanism (300), the fire protection mechanism (400) and the plurality of battery modules (210) are all electrically connected to the controller (500).

Images