Energy storage system of liquid-cooled container

Abstract

The utility model discloses a liquid-cooled container energy storage system, which comprises a box body, a battery pack and a liquid-cooled host, the box body is provided with a battery compartment and a liquid-cooled host compartment, the battery compartment is provided with a battery rack, the battery pack is arranged on the battery rack, the box body is provided with a ventilation structure communicated with the outside in the liquid-cooled host compartment, and the liquid-cooled host is arranged in the liquid-cooled host compartment. The liquid cooling host is provided with a liquid cooling pipeline system connected with the battery pack, the liquid cooling host is provided with an air inlet duct and an air return duct 24 which extend to the battery compartment, the air inlet duct is provided with an air inlet communicated with the battery compartment, and the air return duct 24 is provided with an air return port communicated with the battery compartment. Temperature and humidity control is carried out on the space of the battery compartment through the liquid cooling host, the temperature and humidity in the space of the battery compartment are maintained, condensation generated during long-time operation of the liquid cooling battery compartment is effectively removed, and potential safety hazards are avoided. According to the liquid cooling container energy storage system, heat dissipation of the battery pack and cooling and dehumidification of the battery bin space are integrated on the liquid cooling host, the structure is simpler, and the cost is lower.

Description

Technical Field

[0001] This utility model is applicable to the field of electric energy, and in particular relates to a liquid-cooled container energy storage system. Background Technology

[0002] With the continuous expansion of the use of new energy sources, significant breakthroughs have been achieved in energy storage technology, especially megawatt-scale electrochemical energy storage technology. Megawatt-scale containerized battery energy storage systems possess numerous advantages, including high energy storage capacity, operational reliability, strong operability, and broad adaptability, leading to their increasingly widespread application in new energy distribution and storage, microgrids, mobile power stations, and shared energy storage.

[0003] Compared to air-cooled containerized energy storage systems of the same capacity currently on the market, liquid-cooled containerized energy storage systems do not require the design of battery cooling ducts, saving more than 50% of floor space. They also have higher energy density and are more suitable for large-scale energy storage power stations of hundreds of megawatts or more. In existing containerized energy storage systems, condensation can occur in the liquid-cooled battery compartment during prolonged operation, posing a safety hazard. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art and to provide a liquid-cooled container energy storage system.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A liquid-cooled containerized energy storage system includes a container body, a battery pack, and a liquid-cooled main unit. The container body has a battery compartment and a liquid-cooled main unit compartment. The battery compartment has a battery rack, and the battery pack is mounted on the battery rack. The container body has a ventilation structure in the liquid-cooled main unit compartment that communicates with the outside. The liquid-cooled main unit is located in the liquid-cooled main unit compartment. The liquid-cooled main unit has a liquid-cooled piping system connected to the battery pack. The liquid-cooled main unit has an air inlet duct and an air return duct extending to the battery compartment. The air inlet duct has an air inlet communicating with the battery compartment, and the air return duct has an air return outlet communicating with the battery compartment.

[0007] In some implementations, in conjunction with the above implementations, the air inlet extends from the liquid cooling unit to the top of the battery compartment, the air inlet connects to the battery compartment from the top, the return air duct extends from the liquid cooling unit to the bottom of the battery compartment, and the return air inlet connects to the battery compartment from the bottom.

[0008] In some implementations, the liquid-cooled main unit compartment is located at a corner of the housing, and the housing has ventilation structures on multiple sides of the liquid-cooled main unit compartment.

[0009] In some implementations, the enclosure has a door panel on the side of the battery compartment, the door panel has an explosion vent, and the explosion vent has an explosion vent plate.

[0010] In some implementations, in conjunction with the above implementations, the door panel is provided with a venting plate guide device on the outside of the vent. The venting plate guide device is provided with an inclined back plate. The top of the inclined back plate is inclined outward and connected to the door panel through the side wall plates at both ends. The inclined back plate forms a V-shaped space on the outside of the venting plate for accommodating the venting plate.

[0011] In some implementations, the enclosure is equipped with an explosion-proof air inlet fan and an explosion-proof air outlet fan that are connected to the battery compartment.

[0012] In some implementations, the battery compartment is equipped with a hazardous gas detector, in conjunction with the above implementation methods.

[0013] In some implementations, the battery compartment is equipped with a fire extinguishing device, which includes an aerosol fire extinguishing device and a fire hose.

[0014] In some implementations, the battery compartment is equipped with a smoke temperature sensor to detect the temperature inside the battery compartment and the smoke.

[0015] In some implementations, the enclosure is equipped with a power distribution compartment, which contains a busbar communication cabinet and a control system. The explosion-proof air intake fan, explosion-proof air outlet fan, hazardous gas detector, fire extinguishing device, and smoke and temperature sensor are all connected to the control system.

[0016] One of the above technical solutions has at least one of the following advantages or beneficial effects: In the technical solution of this utility model, the liquid-cooled host is connected to the battery pack through a liquid-cooled pipeline system. Heat exchange is performed between the liquid-cooled pipeline system and the battery pack, completing the temperature control of the entire battery pack within the battery compartment. The battery pack uses liquid-cooled temperature control, which has very high heat exchange efficiency. Simultaneously, the liquid-cooled host is connected to the space inside the battery compartment through air inlet and outlet ducts, further controlling the temperature and humidity of the battery compartment space. This maintains the temperature and humidity within the battery compartment space, effectively removing condensation generated during long-term operation of the liquid-cooled battery compartment and avoiding potential safety hazards. This utility model's liquid-cooled containerized energy storage system integrates battery pack heat dissipation and battery compartment space cooling and dehumidification into the liquid-cooled host, resulting in a simpler structure and lower cost.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the internal structure of one embodiment of the present invention;

[0020] Figure 2 yes Figure 1 The diagram shown is a structural schematic of a liquid-cooled main unit in one embodiment.

[0021] Figure 3 This is a first-view structural schematic diagram of an embodiment of the present invention;

[0022] Figure 4 This is a second-view structural schematic diagram of an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of a liquid cooling pipeline system according to an embodiment of the present invention. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0026] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0027] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0028] in, Figure 1 The reference direction coordinate system of this utility model embodiment is given below, in conjunction with Figure 1 The embodiments of this utility model will be described in the directions shown.

[0029] See Figure 1 , Figure 2 , Figure 4 This utility model provides a liquid-cooled container energy storage system, including a container body 1, a battery pack 2, and a liquid-cooled host 3. The container body 1 has a battery compartment 4 and a liquid-cooled host compartment 5. The battery compartment 4 is a closed space and has a battery rack 6. The battery pack 2 serves as an energy storage unit, and multiple battery packs 2 can be connected in series to form a large-capacity system. The battery pack 2 is set on the battery rack 6. The container body 1 has a ventilation structure in the liquid-cooled host compartment 5 that communicates with the outside. The liquid-cooled host 3 is set in the liquid-cooled host compartment 5 and has a liquid-cooled piping system 8 connected to the battery pack 2. The liquid-cooled host 3 has an air inlet duct 7 and a return air duct 24 extending to the battery compartment 4. The air inlet duct 7 has an air inlet communicating with the battery compartment 4, and the return air duct 24 has a return air outlet communicating with the battery compartment 4.

[0030] See Figure 1 , Figure 2 In this invention, the liquid-cooled host 3 is connected to the battery pack 2 via a liquid-cooled piping system 8. The liquid-cooled piping system 8 facilitates heat exchange with the battery pack 2, controlling the temperature of the battery pack 2 within the entire battery compartment 4. The battery pack 2 utilizes liquid-cooled temperature control, resulting in very high heat exchange efficiency. Simultaneously, the liquid-cooled host 3 is connected to the battery compartment space via an air inlet duct 7 and an air return duct 24, further controlling the temperature and humidity of the battery compartment space. This maintains the temperature and humidity within the battery compartment 4, effectively removing condensation generated during long-term operation and preventing safety hazards. This invention's liquid-cooled containerized energy storage system integrates heat dissipation from the battery pack 2 and cooling and dehumidification of the battery compartment 4 into the liquid-cooled host 3, resulting in a simpler structure and lower cost.

[0031] The liquid cooling host 3 serves as the thermal management host for the battery pack 2 and battery compartment 4, performing thermal management of the battery pack 2 and temperature and humidity control of the battery compartment. The liquid cooling host 3 can be a heat pump unit, which includes a compressor, condenser, expansion valve, and evaporator. The compressor continuously compresses the refrigerant for a working cycle, and the cooling medium of the liquid cooling pipeline system 8 can exchange heat with the liquid cooling host 3, thereby achieving temperature control of the battery pack 2 through continuous circulation.

[0032] See Figure 5 The liquid cooling pipeline system 8 includes primary, secondary, and tertiary pipeline systems and various valves on the pipelines, enabling communication between the liquid cooling host 3 and the battery pack 2. The primary inlet and outlet coolant main pipelines are connected below the liquid cooling host 3 in the liquid cooling pipeline system 8. The secondary inlet and outlet coolant pipelines are the connection sections between each battery cluster and the primary main pipeline. The tertiary inlet and outlet pipelines are the connection sections between each battery pack 2 and the secondary pipeline. The temperature control of the cells in the entire battery compartment is completed through the tertiary pipeline system.

[0033] See Figure 2 The air inlet duct 7 and the air return duct 24 are connected to the evaporator of the liquid cooling host 3. The temperature and humidity of the space inside the battery compartment 4 are controlled by the low temperature of the evaporator and the circulation of air.

[0034] Understandably, the liquid-cooled main unit 3 can also use a semiconductor cooler.

[0035] In some embodiments, the air inlet duct 7 extends from the liquid cooling unit 3 to the top of the battery compartment 4, and the air inlet connects to the battery compartment 4 from the top. The return air duct 24 extends from the liquid cooling unit 3 to the bottom of the battery compartment 4, and the return air inlet connects to the battery compartment 4 from the bottom. In this embodiment, placing the air inlet at the top of the battery compartment 4 and the return air inlet at the bottom of the battery compartment 4 facilitates the rapid distribution of cool air within the battery compartment 4, achieving better temperature and humidity control.

[0036] In some embodiments, the liquid-cooled main unit compartment 5 is located at a corner of the housing 1, and the housing 1 has ventilation structures on multiple sides of the liquid-cooled main unit compartment 5. See also Figure 1 The battery compartment 4 is located on the left side of the housing 1, and the liquid cooling host compartment 5 is located on the right rear side of the housing 1. The rear and right sides of the liquid cooling host compartment 5 are designed with ventilation structures to fully ensure the heat exchange effect between the liquid cooling host 3 and the outside world and improve the heat exchange efficiency.

[0037] In some embodiments, see Figure 1 , Figure 3 , Figure 4The container 1 has a door panel 9 on the side facade of the battery compartment 4. The door panel 9 is a container-style locking door, which is sturdy and durable, and facilitates the installation and maintenance of the battery pack 2. The door panel 9 is equipped with a vent, and the vent is equipped with a vent plate 10. When the pressure inside the battery compartment reaches the activation pressure of the vent plate 10, the vent plate 10 will burst, thereby releasing the pressure inside the battery compartment and preventing deflagration. The vent plate 10 forms a passive protection and fire-fighting component. When a fire occurs in the battery compartment, the pressure inside the battery compartment rises sharply. When the activation pressure of the vent plate 10 is reached, the vent plate 10 on the battery compartment will automatically burst, and the flames will be discharged outward along the guide device outside the vent plate 10, preventing the container energy storage system from exploding and avoiding loss of life or property.

[0038] Further, see Figure 3 , Figure 4 The door panel 9 is equipped with a venting plate guide device 11 on the outside of the vent. The venting plate guide device 11 has an inclined back plate with its top inclined outward and is connected to the door panel 9 through the side wall panels at both ends. The inclined back plate forms a V-shaped space on the outside of the venting plate 10 to accommodate the venting plate 10. The venting plate guide device 11 is installed at the vent and is used to guide the flame after the venting plate 10 explodes, control the flame direction, and avoid loss of personnel or property.

[0039] In some embodiments, see Figure 3 , Figure 4 The enclosure 1 is equipped with an explosion-proof air intake fan 12 and an explosion-proof air exhaust fan 13 that are connected to the battery compartment 4. The explosion-proof air intake fan 12 and the explosion-proof air exhaust fan 13 form an active early warning and fire protection system. When the battery experiences thermal runaway and causes flammable gas leakage, the explosion-proof air intake and exhaust devices respond promptly to exhaust and ventilate, limiting the flammable gas to below 25% of the minimum explosion limit.

[0040] In order to detect the leakage of flammable gas caused by thermal runaway of the battery, the battery compartment 4 is equipped with a hazardous gas detector 14. The hazardous gas detector 14 detects the content of hazardous gases such as CO in the battery compartment, provides a signal to start the explosion-proof fan, and links with the explosion-proof exhaust fan 13 to ventilate the container.

[0041] In some embodiments, the battery compartment 4 is equipped with a fire extinguishing device 15. The fire extinguishing device 15 may be an aerosol fire extinguishing device, which will activate the fire extinguishing action when a fire occurs, to extinguish and cool the fire-fighting space and isolate oxygen.

[0042] The battery compartment 4 is equipped with smoke and temperature sensors 16 to detect the temperature and smoke inside the battery compartment 4. In the event of a fire, the smoke and temperature sensors detect the fire, outputting audible and visual alarms, and activating the fire-fighting system after a certain delay. This embodiment of the invention includes both active early warning fire protection and passive protection fire protection, making fire early warning and protection more reliable.

[0043] The top of the battery compartment 4 is equipped with a fire water pipe 17, which includes pipes, fire pipe interfaces, and nozzles. It is used to connect emergency water for fire extinguishing and cooling in case of fire. When the fire spreads or reignites, the emergency fire water pipe 17 can be connected for emergency treatment to prevent serious consequences such as deflagration and fire.

[0044] In some embodiments, see Figure 1 , Figure 4 The enclosure 1 contains a power distribution compartment 18, located on the front right side of the enclosure 1. The power distribution compartment 18 houses a combiner communication cabinet 19 and a control system 20. The control system 20 includes an industrial control host for controlling the energy storage system. An explosion-proof air intake fan 12, an explosion-proof air outlet fan 13, a hazardous gas detector 14, a fire extinguishing device 15, and a smoke and temperature sensor 16 are all connected to the control system 20. An air conditioner 22 is installed on the enclosure 1 to dissipate heat from the power distribution compartment 18.

[0045] See Figure 1 , Figure 3 , Figure 4A liquid-cooled containerized energy storage system is mainly divided into a battery compartment 4, a power distribution compartment 18, and a liquid-cooled main unit compartment 5. The battery compartment 4 and the power distribution compartment 18 are enclosed spaces, and the three compartments are spatially independent. The battery compartment 4 contains multiple battery racks 6, with battery packs 2 installed on top and a high-voltage box 21 installed below. The high-voltage box 21 realizes the power collection and control of the liquid-cooled battery packs 2. The battery racks 6 are used to install the battery packs 2 and the high-voltage box 21, and are equipped with a fixed structure for liquid-cooled pipelines and wiring harnesses to form a battery cluster system. The top of the compartment is equipped with fire water pipes 17, hazardous gas detectors 14, smoke and temperature sensors 16, fire extinguishing devices 15, and space heat dissipation and dehumidification ducts. The bottom of the compartment is equipped with power distribution cable trays and liquid-cooled main pipelines for the battery packs. The power distribution cable trays are used for various cable wiring in the energy storage system, with the liquid-cooled pipelines for the battery packs 2 located on the outside and the power distribution cable trays located on the inside. The cable trays, liquid-cooled pipelines, air ducts, and other structures inside the compartment are connected to the power distribution compartment 18 and the liquid-cooled compartment. The power distribution compartment 18 houses a combiner communication cabinet 19, a fire protection system controller, and air conditioning equipment. The combiner communication cabinet 19, installed in the power distribution compartment 18, combines the DC power from each battery cluster in the battery compartment 4 for external output. It also integrates a control system 20 to control the entire energy storage system. The lower part of the combiner communication cabinet 19 carries high-voltage power, while the DC power from the multiple battery clusters in the battery compartment 4 is connected via a cable tray, then through a DC main switch and into the external system via the bottom inlet / outlet area. The upper part of the combiner communication cabinet 19 carries low-voltage power, housing the energy storage EMS control system 20 and the fire protection system controller for controlling the entire energy storage system. The air conditioner 22 is externally mounted on the power distribution compartment 18 and can be detached for transport. The liquid-cooled main unit compartment 5 houses a liquid-cooled main unit 3. The liquid-cooled piping and air ducts on the liquid-cooled main unit 3 are connected to the piping and air-cooling systems in the battery compartment 4, enabling temperature control of the battery cells in the battery pack 2 and temperature and humidity control within the battery compartment 4. The explosion-proof lighting 23 inside the container is installed on the top of the container 1. It automatically illuminates when the door is opened, providing lighting inside the container. The entire system adopts standard container dimensions, has a high degree of integration, a compact structure, and is easy to transport and install. It makes full use of the design space, resulting in a compact product structure and innovative product layout and design. The overall protection level of the system can reach IP54 or higher, with the battery compartment 4 reaching IP67, making it very suitable for harsh outdoor environments.

[0046] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A liquid-cooled containerized energy storage system, characterized in that, The device includes a housing, a battery pack, and a liquid-cooled main unit. The housing has a battery compartment and a liquid-cooled main unit compartment. The battery compartment has a battery rack, and the battery pack is mounted on the battery rack. The housing has a ventilation structure in the liquid-cooled main unit compartment that communicates with the outside. The liquid-cooled main unit is located in the liquid-cooled main unit compartment and has a liquid-cooled piping system connected to the battery pack. The liquid-cooled main unit has an air inlet duct and an air return duct extending to the battery compartment. The air inlet duct has an air inlet communicating with the battery compartment, and the air return duct has an air return outlet communicating with the battery compartment.

2. The liquid-cooled container energy storage system according to claim 1, characterized in that, The air inlet extends from the liquid cooling unit to the top of the battery compartment, and the air inlet connects to the battery compartment from the top. The return air duct extends from the liquid cooling unit to the bottom of the battery compartment, and the return air inlet connects to the battery compartment from the bottom.

3. The liquid-cooled container energy storage system according to claim 1, characterized in that, The liquid-cooled main unit compartment is located at the corner of the enclosure, and the enclosure has ventilation structures on multiple sides of the liquid-cooled main unit compartment.

4. The liquid-cooled container energy storage system according to claim 1, characterized in that, The enclosure has a door panel on the side of the battery compartment, and the door panel has an explosion vent, which is equipped with an explosion vent plate.

5. The liquid-cooled container energy storage system according to claim 4, characterized in that, The door panel is provided with a venting plate guide device on the outside of the vent. The venting plate guide device is provided with an inclined back plate. The top of the inclined back plate is inclined outward and is connected to the door panel through the side wall plates at both ends. The inclined back plate forms a V-shaped space on the outside of the venting plate for accommodating the venting plate.

6. The liquid-cooled container energy storage system according to claim 1, characterized in that, The enclosure is equipped with an explosion-proof air inlet fan and an explosion-proof air outlet fan that are connected to the battery compartment.

7. The liquid-cooled container energy storage system according to claim 6, characterized in that, The battery compartment is equipped with a hazardous gas detector.

8. The liquid-cooled container energy storage system according to claim 6, characterized in that, The battery compartment is equipped with a fire extinguishing device, which includes an aerosol fire extinguishing device and a fire hose.

9. The liquid-cooled container energy storage system according to claim 8, characterized in that, The battery compartment is equipped with a smoke temperature sensor to detect the temperature inside the battery compartment and smoke.

10. The liquid-cooled container energy storage system according to claim 9, characterized in that, The enclosure is equipped with a power distribution compartment, which contains a junction communication cabinet and a control system. The explosion-proof air intake fan, explosion-proof air outlet fan, hazardous gas detector, fire extinguishing device, and smoke and temperature sensor are all connected to the control system.

Images