Energy storage device and energy storage system

Abstract

The utility model relates to the technical field of energy storage devices, and discloses an energy storage device and an energy storage system.The energy storage device comprises a cabinet body, the cabinet body comprises a plurality of beam bodies, at least two bins are defined by the beam bodies, at least one bin is constructed to be an electrical bin, at least one bin is constructed to be an energy bin, and the beam bodies are arranged in the energy bin; a heat exchange flow channel is arranged in at least part of at least one of the multiple beam bodies defining the energy bin and used for temperature adjustment of the beam bodies. Therefore, on one hand, the beam body can be cooled, so that collapse of the cabinet body can be prevented, collapse of the energy storage device with thermal runaway can be prevented from influencing surrounding energy storage devices, reliability and safety are improved, a cooling medium in the beam body can be prevented from flowing into the electrical bin, short circuit of electrical parts is prevented, and the service life of the cabinet body is prolonged. And on the other hand, the temperature of the cabinet body and the energy bin can be raised, the maintenance difficulty can be reduced, and the working performance of the energy storage device can be kept stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage devices, in particular to an energy storage device and an energy storage system. BACKGROUND

[0002] In the related art, the energy storage device has a battery cluster inside, and when thermal runaway occurs inside, the cabinet of the energy storage device is prone to collapse, which has certain safety hazards. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, one purpose of the present application is to provide an energy storage device, which has a lower probability of deformation and collapse when thermal runaway occurs, and can improve the safety and reliability of the energy storage device.

[0004] The present application further provides an energy storage system having the above energy storage device.

[0005] In a first aspect, the present application provides an energy storage device, which comprises a cabinet, and the cabinet comprises: a plurality of beam bodies, the beam bodies surround at least two compartments, and at least one compartment is configured as an electrical compartment, and at least one compartment is configured as an energy compartment, the energy compartment is used for accommodating a battery cluster, and the battery cluster comprises a plurality of battery devices; wherein at least part of at least one of the plurality of beam bodies defining the energy compartment is provided with a heat exchange channel, and is used for temperature regulation of itself.

[0006] According to the energy storage device of the embodiments of the present application, by providing the heat exchange channel in at least part of at least one of the plurality of beam bodies defining the energy compartment, on the one hand, not only can the beam body itself be cooled, the probability of softening and deformation of the beam body when the energy storage device has thermal runaway can be reduced, so that the cabinet can remain stable and reliable as a whole, thereby preventing the cabinet from collapsing, and preventing the collapse of the energy storage device with thermal runaway from affecting the surrounding energy storage devices, to improve the reliability and safety and reduce the safety hazards, but also preventing the cooling medium in the beam body from flowing into the electrical compartment to prevent short circuit of electrical components, and delaying the spread of thermal runaway, while also reducing the maintenance cost of subsequent energy storage devices, on the other hand, the cabinet and the energy compartment can also be warmed up, which not only reduces the maintenance difficulty, but also keeps the working performance of the energy storage device stable.

[0007] According to some embodiments of the present application, the beam body comprises: a first beam extending in a first direction, a second beam extending in a second direction, and a third beam extending in a third direction, and the part of the first beam defining the energy compartment, and / or the part of the second beam defining the energy compartment, and / or the part of the third beam defining the energy compartment is provided with a heat exchange channel, and the heat exchange channels in the plurality of beam bodies are communicated, and the first direction, the second direction and the third direction have an included angle with each other.

[0008] In the above technical solution, by setting heat exchange channels in at least the first beam, the second beam, or the third beam, the temperature of the beam can be regulated to avoid softening or deformation of the cabinet, thereby reducing safety hazards and improving the reliability and stability of the energy storage device. Furthermore, by selectively setting heat exchange channels based on the arrangement of the beam, the probability of the cooling medium affecting the electrical compartment can also be reduced, thereby improving the working safety and reliability of the electrical compartment.

[0009] According to some embodiments of this application, the beam further includes: a bracing beam, which extends obliquely between a first direction and a second direction and is connected to the first beam and the second beam, or extends obliquely between the second direction and a third direction and is connected to the second beam and the third beam, or extends obliquely between the first direction and a third direction and is connected to the first beam and the third beam, and a heat exchange channel is provided in the bracing beam located within the projection range of the energy chamber.

[0010] In the above technical solution, the overall structural strength of the cabinet can be further improved by setting the diagonal bracing beam, so that the support and load-bearing effect of the cabinet is better and the probability of cabinet deformation can be further reduced. Heat exchange channels can also be set inside the diagonal bracing beam, which not only reduces the difficulty of connecting the heat exchange channels in multiple beams, but also further improves the temperature regulation effect of the cabinet itself and improves the heating efficiency of the energy chamber.

[0011] According to some embodiments of this application, the energy storage device further includes: a first cabinet door, which is openably disposed in the energy chamber, and sealing portions are provided between the first cabinet door and the first beam, and between the first beam and the second beam.

[0012] In the above technical solution, a sealing part is provided between the first cabinet door and the first beam, and between the first cabinet door and the second beam. The sealing part seals with the peripheral edge of the first cabinet door and forms a sealing interface, which can achieve the separation and sealing between the energy chamber and the external environment, so as to prevent foreign objects from entering the energy chamber and improve the safety and reliability of the energy chamber.

[0013] According to some embodiments of this application, heat exchange channels are provided in the first beam and the second beam located on the side where the first cabinet door is located, for use as a temperature regulating sealing part.

[0014] In the above technical solution, this application specifically provides heat exchange channels inside the first beam and the second beam located on one side of the first cabinet door. This allows for the cooling of the first and second beams themselves, as well as the cooling of the sealing part. This can delay or even prevent the failure of the sealing interface. A more stable sealing interface can prevent the high-temperature and high-pressure gas flow (gas carrying particulate matter or even open flame) inside the energy chamber from being ejected outward, thus avoiding impact on adjacent energy storage devices. This further improves the safety of the energy storage device, slows down the spread of thermal runaway, and allows the sealing part to be heated when the ambient temperature is low. This enables the sealing part to maintain its plastic deformation capacity, ensuring the sealing effect and preventing structural damage to the sealing part, thereby extending its service life. It also prevents icing in the area where the sealing part is located and ensures the stable opening of the first cabinet door, reducing the difficulty of maintenance and upkeep.

[0015] According to some embodiments of this application, at least one side of the cabinet is provided with a rainproof eave, and a first spray section communicating with the heat exchange channel is provided on the rainproof eave.

[0016] In the above technical solution, a first spray section can be installed on the bottom surface of the rainproof eaves. The first spray section can form a water curtain on the outside of the cabinet and cool it down through the water curtain to prevent fire on the outside of the cabinet. It can also improve high-temperature radiation to reduce the impact of the cabinet that has thermal runaway on the surrounding cabinets and further slow down the spread of thermal runaway.

[0017] According to some embodiments of this application, there are multiple first spray units, which are spaced apart on the rainproof eaves. The first spray unit is constructed as a normally closed spray head and is configured to open when the temperature exceeds a temperature threshold or smoke is detected.

[0018] In the above technical solution, on the one hand, the setting of multiple first spray units can achieve uniform cooling of the cabinet on the outside of the cabinet. On the other hand, the first spray units can be turned on at appropriate times to cool the outside of the cabinet. Under the premise of effectively avoiding open flames on the outside of the cabinet and slowing down the spread of thermal runaway, external spray cooling is not carried out in the early stage of thermal runaway. Instead, spray cooling is carried out when the internal temperature rises significantly or smoke appears. With limited cooling medium, maximum thermal runaway suppression can be achieved, further improving safety.

[0019] According to some embodiments of this application, a medium outlet communicating with the heat exchange channel is also provided on the first beam, and / or the second beam, and / or the third beam, which has a heat exchange channel. The medium outlet is used to discharge cooling medium for external cooling of the energy storage device.

[0020] In the above technical solution, at least one of the multiple first beams, second beams and third beams of the energy chamber is provided with a heat exchange channel. The heat exchange channel is connected to the outside through a medium outlet and can output cooling medium to the outside through the medium outlet. This cooling medium can cool the outside of the cabinet, prevent fires on the outside of the cabinet, and improve high-temperature radiation. This can reduce the impact of the cabinet that has thermal runaway on the surrounding cabinets and further slow down the spread of thermal runaway.

[0021] According to some embodiments of this application, a second spray section is provided on the medium outlet, and the second spray section is adapted to spray cooling medium.

[0022] In the above technical solution, the cooling medium flowing out of the medium outlet can be sprayed to the outside of the cabinet through the second spray section, and a water curtain can be formed on the outside of the cabinet. The water curtain can cool down the cabinet to prevent fire on the outside of the cabinet, and can improve high temperature radiation to reduce the impact of the cabinet that has thermal runaway on the surrounding cabinets, and further slow down the spread of thermal runaway.

[0023] According to some embodiments of this application, there are multiple second spray sections, and at least one second spray section is provided for each energy chamber. The second spray section is constructed as a normally closed spray head and is configured to open when the temperature exceeds a temperature threshold or smoke is detected.

[0024] In the above technical solution, each of the multiple energy chambers can have at least one second spray section on its exterior, thereby achieving reliable and effective cooling of the exterior of the energy chambers, improving the temperature uniformity of the exterior of the multiple energy chambers, preventing the exterior temperature of any energy chamber from becoming too high, and further improving safety.

[0025] At the same time, the second spray unit can be turned on at the appropriate time to cool the outside of the cabinet. Under the premise of effectively avoiding open flames on the outside of the cabinet and slowing down the spread of thermal runaway, external spray cooling is not carried out in the early stage of thermal runaway. Instead, spray cooling is carried out when the internal temperature rises significantly or smoke appears. With limited cooling medium, maximum thermal runaway suppression can be achieved, further improving safety.

[0026] According to some embodiments of this application, the energy storage device further includes: a second cabinet door, which is operablely disposed in the electrical compartment, and the second cabinet door is located on one side surface defined by the third beam and the first beam.

[0027] In the above technical solution, the energy compartment and the battery compartment are opened from different directions. On the one hand, in the event of thermal runaway of the energy storage device, the energy can be accessed through the second cabinet door and the electrical components can be controlled, such as by timely power cut-off, which helps to suppress thermal runaway and is safer. On the other hand, during the cooling process of the cooling medium sprayed on the outside of the cabinet, the probability of the cooling medium entering the electrical compartment is lower, and the reliability and safety of the electrical components in the electrical compartment are higher.

[0028] Secondly, this application proposes an energy storage system, including a power conversion device and an energy storage device as described above, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0029] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0031] Figure 1 This is a schematic diagram of an energy storage device according to the first embodiment of this application;

[0032] Figure 2 This is a partially enlarged schematic diagram of the rainproof eaves according to the first embodiment of this application;

[0033] Figure 3 This is a schematic diagram of an energy storage device according to a second embodiment of this application;

[0034] Figure 4 This is another schematic diagram of an energy storage device according to the second embodiment of this application;

[0035] Figure 5 This is a schematic diagram of an energy storage system according to an embodiment of this application.

[0036] Figure label:

[0037] Energy storage device 100,

[0038] Cabinet 10, beam 11, first beam 111, second beam 112, third beam 113, heat exchange channel 14, medium inlet 141.

[0039] First cabinet door 20, sealing part 30.

[0040] Rainproof eaves 40, first sprinkler section 41,

[0041] Second spray section 50,

[0042] Energy storage system 200, power conversion equipment 300, power generation equipment 400.

[0043] Electrical warehouse A, Energy warehouse B

[0044] First direction X, second direction Y, third direction Z. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0047] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0050] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0051] In the description of this application, it should be understood that 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., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do 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, and therefore should not be construed as a limitation of this application.

[0052] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0053] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0054] In this application, "multiple" means two or more (including two).

[0055] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0056] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0057] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0058] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0059] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0060] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0061] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0062] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0063] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0064] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0065] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as the Insulation Monitoring Module (IMM), the Master Battery Management Unit (MBMU), the Ethernet (ETH) module, and the fiber optic conversion module.

[0066] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0067] As shown in Figure 5, in some embodiments, the energy storage system 200 may include one or more energy storage devices 100 and a power converter system (PCS), the power converter system 300 being connected between the power generation device 400 and the energy storage device 100. The power generation device 400 is used to generate electrical energy, and the electrical energy generated by the power generation device 400 can be stored in the energy storage device 100 through the power converter system 300.

[0068] As an example, the power generation equipment 400 can specifically be a solar panel, hydroelectric power generation equipment, thermal power generation equipment, wind power generation equipment, etc. This application does not limit the specific type of the power generation equipment 400.

[0069] In related technologies, fire protection systems can provide fire protection functions through liquid-cooled pipelines, integrate temperature control and fire protection, use water with high specific heat capacity as the fire protection medium, reduce the overall demand for fire protection medium, and make the battery cluster structure more compact, which can achieve rapid fire extinguishing and cooling functions, and effectively prevent reignition.

[0070] However, when the energy storage device 100 experiences thermal runaway, it may continue to burn, which may further cause structural changes in the beam 11 of the cabinet 10, such as softening or deformation of the beam 11. It may even lead to the collapse of the energy storage device 100, which will not only exacerbate the thermal runaway, but may also affect other energy storage devices 100 in the surrounding area, posing certain safety hazards.

[0071] In addition, in some application scenarios, the energy storage device 100 may be in extreme weather conditions (e.g., as a marine energy storage device, the ambient temperature of the ship is low, or the energy storage device 100 is set in an area with low ambient temperature). The low ambient temperature of the energy storage device 100 will lead to a low internal temperature of the energy storage device 100, and the energy density of the battery cluster in the energy compartment b will decrease significantly, reducing the working performance of the energy storage device 100. Moreover, the opening of the energy compartment b will be more difficult, which will also increase the difficulty of maintenance and repair.

[0072] Based on this, this application proposes an energy storage device 100. By setting a heat exchange channel 14 inside the beam 11, on the one hand, the cabinet 10 can maintain the stability and reliability of the beam 11 when thermal runaway occurs in the energy storage device 100, reducing the probability of deformation and softening of the beam 11 during thermal runaway, thereby reducing the probability of collapse of the energy storage device 100, thus improving the safety of the energy storage device 100 and reducing safety hazards. On the other hand, it can realize the temperature regulation of the cabinet 10. Under extreme weather conditions, it can not only reduce the difficulty of opening the energy compartment b, thereby reducing the difficulty of maintenance, but also realize the temperature regulation inside the energy compartment b, avoiding the battery cluster operating temperature from being too low, and also keeping the working performance of the energy storage device 100 stable.

[0073] The following is for reference. Figures 1-5 This application describes an energy storage device 100 and an energy storage system 200 according to embodiments thereof.

[0074] Combination Figure 1 and Figure 3 As shown, this application proposes an energy storage device 100, which includes a cabinet 10, the cabinet 10 including a plurality of beams 11, the beams 11 enclosing at least two compartments, and at least one compartment is configured as an electrical compartment a and at least one compartment is configured as an energy compartment b, the energy compartment b being used to house a battery cluster, the battery cluster including a plurality of battery devices.

[0075] The cabinet 10 may include a beam 11 and multiple plates covering the beam 11. The beam 11 defines a hollow frame structure. Plates may be installed around the perimeter of the frame structure to separate the internal structure from the outside. The interior of the hollow cabinet 10 may be divided into multiple compartments. At least one compartment is used to house electrical components, such as a main control module and a power distribution module, forming an electrical compartment a. At least one compartment is used to house battery clusters, forming an energy compartment b. Of course, the energy compartment b may also be further equipped with a temperature control module, an internal fire suppression module, etc., to control the operating temperature of the battery clusters and to implement fire suppression functions through the internal fire suppression module in the event of thermal runaway of the battery clusters.

[0076] In this embodiment, at least a portion of at least one of the multiple beams 11 defining the energy chamber b is provided with a heat exchange channel 14 for its own temperature regulation.

[0077] Specifically, each beam 11 is constructed as a hollow structure so that heat exchange channels 14 can be further arranged inside the beam 11, or the hollow structure inside can be directly formed as heat exchange channels 14. Cooling medium can flow inside the heat exchange channels 14, and the temperature of the beam 11 can be regulated during the flow of the cooling medium.

[0078] It should be noted that the provision of a heat exchange channel 14 in at least a portion of at least one of the multiple beams 11 that define the energy chamber b means that the energy chamber b is defined by multiple beams 11, and a heat exchange channel 14 can be provided in at least one of the multiple beams 11. When the beam 11 with the heat exchange channel 14 is only used to define the energy chamber b, the heat exchange channel 14 can penetrate the beam 11 along its length. When a portion of the beam 11 with the heat exchange channel 14 is used to define the energy chamber b and another portion is used to define the electrical chamber a, the portion of the beam 11 used to define the energy chamber b is provided with the heat exchange channel 14.

[0079] When multiple beams 11 are provided with heat exchange channels 14, the multiple heat exchange channels 14 can be connected end to end to achieve series cooling, or they can each introduce cooling medium through the medium inlet 141 and flow out through the medium return port to achieve parallel cooling. Those skilled in the art can make reasonable settings according to their needs, and this application does not make specific limitations.

[0080] This application only provides heat exchange channels 14 for the portion of beam 11 corresponding to energy chamber b. On one hand, this not only cools the portion of beam 11 opposite energy chamber b, reducing the probability of softening and deformation of beam 11 and improving support stability and reliability, but also reduces the probability of deformation and collapse of cabinet 10, improving safety and reliability. Furthermore, the absence of heat exchange channels 14 in the area where electrical chamber a is located prevents the cooling medium inside beam 11 from flowing into electrical chamber a, thus avoiding short circuits and burnout of components inside electrical chamber a, further enhancing safety. This ensures safety, reduces safety hazards, and lowers the maintenance cost of the energy storage device 100 in the event of thermal runaway. On the other hand, when the energy storage device 100 is used in a low-temperature environment, the cooling medium flowing inside the beam 11 can regulate the temperature of the energy chamber b. This not only prevents the battery cluster from operating at too low a temperature, thus ensuring the stable performance of the energy storage device 100, but also ensures that the energy chamber b will not freeze in local areas. It also reduces the difficulty of opening the energy chamber b, thereby reducing the difficulty of maintenance and upkeep of the energy storage device 100.

[0081] It is understandable that there are generally multiple energy storage devices 100 arranged according to a certain pattern (such as sequential arrangement or array arrangement). The beam 11 structure of this application has higher structural stability, and the probability of deformation and collapse of the cabinet 10 in the event of thermal runaway is lower. It can also reduce the impact on the surrounding adjacent energy storage devices 100 when the energy storage device 100 experiences thermal runaway, and the safety and reliability are higher. For the energy storage device 100 itself, the cabinet 10 with higher structural stability can also provide higher safety and stability for the double-layer stacked cabinet technical solution.

[0082] It should be noted that the energy chamber b is generally constructed as an openable space to facilitate the housing of battery clusters and their daily maintenance and upkeep. However, when the ambient temperature is low, ice may form on the outside of the cabinet, making it more difficult to open the energy chamber b. Furthermore, when the operating temperature inside the energy chamber b is low, the energy density of the battery clusters will decrease, resulting in a reduction in the energy storage capacity of the energy storage device 100 and affecting its performance. The cooling medium inside the beam 11 can raise the temperature of the cabinet, which not only prevents the cabinet from freezing but also regulates the temperature of the energy chamber b to increase its operating temperature.

[0083] According to the embodiments of this application, the energy storage device 100, by providing a heat exchange channel 14 in at least a portion of at least one of the plurality of beams 11 defining the energy chamber b, can, on the one hand, not only achieve cooling of the beams 11 themselves, reducing the probability of softening and deformation of the beams 11 when thermal runaway occurs in the energy storage device 100, so that the cabinet 10 can remain stable and reliable as a whole, thereby preventing the cabinet 10 from collapsing, and preventing the collapse of the energy storage device 100 in the event of thermal runaway from affecting the surrounding energy storage devices 100, thus improving reliability and safety and reducing safety hazards, but also prevents the cooling medium in the beams 11 from flowing into the electrical chamber a, thereby preventing short circuits in electrical components and delaying the spread of thermal runaway, while also reducing the maintenance cost of the subsequent energy storage device 100. On the other hand, it can also achieve heating of the cabinet 10 and the energy chamber b, which can not only reduce the difficulty of maintenance and upkeep, but also keep the working performance of the energy storage device 100 stable.

[0084] like Figure 1 and Figure 3 As shown, according to some embodiments of this application, the beam 11 includes: a first beam 111 extending along a first direction, a second beam 112 extending along a second direction, and a third beam 113 extending along a third direction. The first beam 111 defines a portion of the energy chamber b, and / or the second beam 112 defines a portion of the energy chamber b, and / or the third beam 113 defines a portion of the energy chamber b. Heat exchange channels 14 are provided in the portion of the energy chamber b, and the heat exchange channels 14 in the plurality of beams 11 are connected. The first direction, the second direction, and the third direction have an angle with each other.

[0085] It should be noted that, in the embodiments of this application, the first direction can be the length direction of the cabinet 10, the second direction can be the height direction of the cabinet 10, and the third direction can be the width direction of the cabinet.

[0086] Specifically, the cabinet is defined by at least the first beam 111, the second beam 112 and the third beam 113, and the electrical compartment a and the energy compartment b are divided by further plates. At least one of the first beam 111, the second beam 112 and the third beam 113 can be provided with a heat exchange channel 14, and the heat exchange channel 14 can be constructed to pass through the beam 11 or pass through part of the beam 11.

[0087] For example, the cabinet 10 includes an electrical compartment a and a plurality of energy compartments b arranged sequentially in a first direction. The portion of the first beam 111 opposite to the electrical compartment a, as well as the second beam 112 and the third beam 113 that define the electrical compartment a, are not provided with heat exchange channels 14. However, the portions of the first beam 111, the second beam 112, and the third beam 113 opposite to the energy compartments b may be provided with heat exchange channels 14.

[0088] In this way, by setting heat exchange channels 14 in at least the first beam 111, the second beam 112 or the third beam 113, the temperature of the beam body 11 can be regulated to avoid softening and deformation of the cabinet, thereby reducing safety hazards and improving the reliability and stability of the energy storage device 100. Furthermore, by selectively setting heat exchange channels 14 based on the arrangement of the beam body 11, the probability of the cooling medium affecting the electrical compartment a can also be reduced, thereby improving the working safety and reliability of the electrical compartment a.

[0089] According to some embodiments of this application, the beam 11 further includes: a bracing beam, which extends obliquely between a first direction and a second direction and is connected to the first beam 111 and the second beam 112, or extends obliquely between the second direction and a third direction and is connected to the second beam 112 and the third beam 113, or extends obliquely between the first direction and a third direction and is connected to the first beam 111 and the third beam 113, and a heat exchange channel 14 is provided in the bracing beam located within the projection range of the energy chamber b.

[0090] Specifically, the diagonal bracing beam can be set between the first beam 111 and the second beam 112 and extend obliquely, or set between the second beam 112 and the third beam 113 and extend obliquely, or set between the first beam 111 and the third beam 113 and extend obliquely.

[0091] Therefore, by setting the diagonal bracing beam, the overall structural strength of the cabinet 10 can be further improved, making the support and load-bearing effect of the cabinet 10 better, and further reducing the probability of deformation of the cabinet 10. Heat exchange channels 14 can also be set inside the diagonal bracing beam, which not only reduces the difficulty of connecting the heat exchange channels 14 in multiple beams 11, but also further improves the temperature regulation effect of the cabinet 10 itself, and improves the heating efficiency of the energy chamber b.

[0092] According to some embodiments of this application, the energy storage device 100 further includes: a first cabinet door 20, which is operably disposed in the energy chamber b, and a sealing part 30 is provided between the first cabinet door 20 and the first beam 111 and between the first beam 112.

[0093] In this application, a sealing part 30 is provided between the first cabinet door 20 and the first beam 111, and between the first cabinet door 20 and the second beam 112. The sealing part 30 seals with the peripheral edge of the first cabinet door 20 and forms a sealing interface, which can achieve the separation and sealing between the energy chamber b and the external environment, so as to prevent foreign objects from entering the energy chamber b and improve the safety and reliability of the energy chamber b.

[0094] like Figure 4 As shown, according to some embodiments of this application, heat exchange channels 14 are provided in the first beam 111 and the second beam 112 located on the side where the first cabinet door 20 is located, for use in the temperature regulating sealing part 30.

[0095] It should be noted that in the existing technology, when thermal runaway and thermal diffusion occur inside the cabinet 10, existing fire-fighting methods such as aerosols and perfluorohexanone fire extinguishers cannot extinguish the fire after thermal diffusion. If water fire-fighting is used, it may further cause insulation failure inside the energy storage cabinet, resulting in high-voltage arcing, which may break down battery modules and battery cells, leading to further diffusion. After the battery cells and battery modules inside the cabinet 10 further diffuse, the high temperature will cause the sealing interface to fail, and the smoke will continue to be ejected outward. The lack of discharge of high-temperature and high-pressure gas and fire flow may cause fire to start outside the cabinet 10 and spread to adjacent energy storage devices 100. Adjacent energy storage devices 100 also face the risk of spreading and igniting.

[0096] In addition, the sealing part 30 is used to isolate the energy chamber b from the external environment. When the external temperature is low, the sealing part 30 will have a reduced plastic deformation capacity, the sealing effect will easily decrease, and it may suffer irreversible structural damage.

[0097] Based on this, this application specifically provides heat exchange channels 14 inside the first beam 111 and the second beam 112 located on one side of the first cabinet door 20. This allows the first beam 111 and the second beam 112 to cool themselves while also regulating the temperature of the sealing part 30. This can delay or even prevent the failure of the sealing interface. A more stable sealing interface can prevent the high-temperature and high-pressure gas flow (gas carrying particulate matter or even open flame) inside the energy chamber b from being ejected outward, thus avoiding impact on the adjacent energy storage device 100. This further improves the safety of the energy storage device 100 and slows down the spread of thermal runaway. At the same time, when the ambient temperature is low, the sealing part 30 can be heated so that it can maintain its plastic deformation ability to ensure the sealing effect and prevent structural damage to the sealing part 30, thereby extending its service life. It can also prevent icing in the area where the sealing part 30 is located and ensure the stable opening of the first cabinet door 20, thereby reducing the difficulty of maintenance and upkeep.

[0098] like Figure 1 and Figure 2 As shown, according to some embodiments of this application, at least one side of the cabinet 10 is provided with a rainproof eave 40, and the rainproof eave 40 is provided with a first spray section 41 that communicates with the heat exchange channel 14.

[0099] For example, a rainproof eaves 40 is provided on the second beam 112 located above the first cabinet door 20, and a first spray section 41 is provided on the side of the rainproof eaves 40 facing the first cabinet door 20. The heat exchange channel 14 in the second beam 112 is connected to the spray hole.

[0100] In the second direction, a rainproof eave 40 is provided on the second beam 112 above the first cabinet door 20. The rainproof eave 40 extends along the first direction and can be fixedly connected to the second beam 112. The top surface of the rainproof eave 40 can be constructed as a slope to guide rainwater under normal use conditions, prevent rainwater from falling directly onto the surface of the first cabinet door 20, reduce the erosion of the sealing part 30 by rain and snow, and further improve the reliability and stability of the sealing interface.

[0101] Furthermore, a first spray section 41 can be installed on the bottom surface of the rainproof eaves 40. The first spray section 41 can form a water curtain on the outside of the cabinet 10 and cool down through the water curtain to prevent fire on the outside of the cabinet 10. It can also improve high-temperature radiation to reduce the impact of the cabinet 10 that has thermal runaway on the surrounding cabinets 10 and further slow down the spread of thermal runaway.

[0102] It should be noted that there are multiple first spray units 41 installed on the rainproof eaves 40, and no first spray units 41 are installed in the area corresponding to the electrical compartment a, so as to achieve uniform cooling of the cabinet 10 on the outside of the cabinet 10 and reduce the impact on the electrical compartment a.

[0103] According to some embodiments of this application, a medium outlet communicating with the heat exchange channel 14 is also provided on the first beam 111, and / or the second beam 112, and / or the third beam 113 having the heat exchange channel 14. The medium outlet is used to discharge the cooling medium for external cooling of the energy storage device 100.

[0104] It should be noted that the medium outlet should be distinguished from the medium return port mentioned above. The medium return port is used for the circulation of the cooling medium, while the medium outlet is used to discharge the cooling medium.

[0105] Among them, at least one of the multiple first beams 111, second beams 112 and third beams 113 of the energy chamber b is provided with a heat exchange channel 14. The heat exchange channel 14 is connected to the outside through a medium outlet and can output a cooling medium to the outside through the medium outlet to cool the outside of the cabinet 10. It can also prevent fire on the outside of the cabinet 10 and improve high temperature radiation, so as to reduce the impact of the cabinet 10 that has thermal runaway on the surrounding cabinets 10 and further slow down the spread of thermal runaway.

[0106] like Figure 3 As shown, according to some embodiments of this application, a second spray section 50 is provided on the medium outlet, and the second spray section 50 is adapted to spray cooling medium.

[0107] Specifically, the cooling medium flowing out of the medium outlet can be sprayed onto the outside of the cabinet 10 through the second spray section 50, and a water curtain can be formed on the outside of the cabinet 10. The water curtain can cool down the outside of the cabinet 10 to prevent fire from starting on the outside of the cabinet 10. It can also improve high-temperature radiation to reduce the impact of the cabinet 10 that has thermal runaway on the surrounding cabinets 10, and further slow down the spread of thermal runaway.

[0108] Combination Figure 3 and Figure 4 According to some embodiments of this application, there are multiple second spray sections 50, and at least one second spray section 50 is provided for each energy chamber b.

[0109] Therefore, each of the multiple energy chambers b can have at least one second spray section 50 on its exterior, thereby achieving reliable and effective cooling of the exterior of the energy chambers b, improving the temperature uniformity of the exterior of the multiple energy chambers b, preventing the exterior temperature of any energy chamber b from becoming too high, and further improving safety.

[0110] It should be noted that in the first embodiment of this application, the outer side of the cabinet 10 is cooled by setting a rainproof eave 40 and a first spray section 41 on the rainproof eave 40. In the second embodiment of this application, the outer side of the cabinet 10 is cooled by directly setting a second spray section 50 on the beam 11. Of course, the same technical effect can also be achieved by setting a rainproof eave 40 on only one side of the cabinet 10 and setting a first spray section 41 on the rainproof eave 40, while setting a second spray section 50 on the other sides of the cabinet 10.

[0111] Furthermore, in this embodiment of the application, the first spray section 41 is configured as a normally closed spray head and is configured to open when the temperature exceeds a temperature threshold or smoke is detected; the second spray section 50 is configured as a normally closed spray head and is configured to open when the temperature exceeds a temperature threshold or smoke is detected.

[0112] Therefore, when thermal runaway occurs inside the energy storage device 100, the internal fire protection module or temperature control module can be used to detect temperature and smoke alarms and control the heat exchange channel 14 inside the beam 11 to circulate the cooling medium. The cooling medium circulates through the heat exchange channel 14 to cool and reduce the temperature of the beam 11 and the sealing interface. Then, when the first spray section 41 and / or the second spray section 50 exceed the temperature threshold, and / or the sealing interface starts to emit smoke (smoke is detected), the first spray section 41 and / or the second spray section 50 are activated to spray the cooling medium to cool the outer surface of the cabinet 10 and the sealing interface.

[0113] It is understood that the energy storage device in this application embodiment may include an internal fire suppression module and an external fire suppression module. The internal fire suppression module is used to suppress thermal runaway of the battery cluster. The external fire suppression module includes: a heat exchange channel 14 inside the beam 11, a cooling medium circulation supply unit, and a first spray section 41 and / or a second spray section 50. The external fire suppression module can cool the beam 11, the sealing interface, and the outside of the cabinet 10. Of course, if the requirements of thermal runaway suppression and thermal propagation delay can be met by only setting the external fire suppression module, the internal fire suppression module may not be set.

[0114] For example, the fire protection system of this application embodiment includes an internal fire protection module and an external fire protection module. The working process of the fire protection system is as follows: when thermal runaway occurs inside the cabinet 10, the temperature and smoke detectors of the internal fire protection module are alarmed, and both the internal and external fire protection modules are activated. The internal fire protection module controls the thermal runaway fire inside the cabinet 10, and the cooling medium cools down the beam 11 and the sealing interface, which can reduce the waste of cooling medium in the early stage of thermal runaway and thermal diffusion. Then, when the internal fire protection system cannot prevent the thermal runaway of the battery cells and battery modules from spreading, as the thermal runaway temperature inside the cabinet 10 rises, the first spray section 41 and / or the second spray section 50 are activated when they reach the temperature threshold / smoke begins to emerge from the sealing interface, and the external surface of the cabinet 10 and the sealing interface are cooled by spraying cooling medium.

[0115] Therefore, the first spray section 41 and / or the second spray section 50 can be opened at the appropriate time to cool the outside of the cabinet 10. Under the premise of effectively avoiding open flames on the outside of the cabinet 10 and slowing down the spread of thermal runaway, external spray cooling is not carried out in the early stage of thermal runaway. Instead, spray cooling is carried out when the internal temperature rises significantly or smoke appears. With limited cooling medium, maximum thermal runaway suppression can be achieved, further improving safety.

[0116] Of course, the external fire protection module can also regulate the temperature of energy chamber b, which will not be elaborated here.

[0117] According to some embodiments of this application, the energy storage device 100 further includes: a second cabinet door, which is operably disposed in the electrical compartment a, and the second cabinet door is located on one side surface defined by the third beam 113 and the first beam 111.

[0118] This allows the energy compartment b and the battery compartment to open from different directions. On the one hand, in the event of thermal runaway in the energy storage device 100, the energy can enter through the second cabinet door and control the electrical components, such as by cutting off power in time, which helps to suppress thermal runaway and is safer. On the other hand, during the cooling process of the cooling medium sprayed on the outside of the cabinet 10, the probability of the cooling medium entering the electrical compartment a is lower, and the reliability and safety of the electrical components in the electrical compartment a are higher.

[0119] The energy storage device 100 of the present application embodiment will now be described in detail with reference to the accompanying drawings.

[0120] like Figure 1 and Figure 3As shown, the energy storage device 100 includes a cabinet 10, which is defined by a plurality of first beams 111, second beams 112 and third beams 113. Of course, diagonal bracing beams can also be provided. At least the second beams 112 and the first beams 111 are provided with heat exchange channels 14, and the plurality of heat exchange channels 14 are connected. The third beams 113 and the diagonal bracing beams can also be provided with heat exchange channels 14. At least one side surface of the cabinet 10 is provided with a second spray section 50, or at least one side surface is provided with a rainproof eave 40. The rainproof eave 40 is provided with a first spray section 41. The first spray section 41 and the second spray section 50 are preferably arranged on the side where the first cabinet door 20 is located.

[0121] Therefore, when thermal runaway occurs in the energy storage device 100, the circulation of cooling medium inside the beam 11 can cool down the beam 11, ensure the structural strength of the beam 11, prevent the cabinet 10 from collapsing, and at the same time cool down the sealing interface, delay the failure of the seal, and prevent the smoke from being ejected through the sealing interface and spreading to the adjacent energy storage device 100.

[0122] Furthermore, when the first spray section 41 and the second spray section 50 can be actively (manually activated, a trigger button can be installed on the side of the electrical compartment a) / passively activated, the outer surface of the cabinet 10 and the sealing interface are cooled by a covering water curtain. At the same time, the external air humidity is increased, reducing the risk of external fire spread. This not only reduces the waste of cooling medium, but also extends the protection time of the external fire protection system.

[0123] Of course, the heat exchange channel 14 in this embodiment can also regulate the temperature of at least part of the beam 11 itself and the energy chamber b. It can work with the temperature control module to make the working temperature of the battery cluster in the energy chamber b more suitable, which can improve the working performance of the energy storage device 100. At the same time, it can regulate the temperature of the sealing part 30, avoid structural damage to the sealing part 30, and improve the sealing effect of the sealing part 30.

[0124] like Figure 5 As shown, this application proposes an energy storage system 200, including a power conversion device and an energy storage device 100 in the above embodiment. The power conversion device is used to electrically connect the power generation device and the energy storage device 100.

[0125] The energy storage system 200 according to the embodiments of this application, by using the above-described energy storage device 100, can improve the safety and reliability of the energy storage system 200.

[0126] Other configurations and operations of the energy storage device 100 and energy storage system 200 according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0127] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., 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 this application. In this specification, the 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.

[0128] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An energy storage device, characterized in that, include: The cabinet (10) includes: a plurality of beams (11) that enclose at least two compartments, and at least one compartment is configured as an electrical compartment (a) and at least one compartment is configured as an energy compartment (b). The energy compartment (b) is used to house a battery cluster, the battery cluster including a plurality of battery devices. At least a portion of at least one of the plurality of beams (11) defining the energy compartment (b) is provided with a heat exchange channel (14) for its own temperature regulation.

2. The energy storage device according to claim 1, characterized in that, The beam body (11) includes: a first beam (111) extending along a first direction, a second beam (112) extending along a second direction, and a third beam (113) extending along a third direction. The first beam (111) defines a portion of the energy chamber (b), and / or the second beam (112) defines a portion of the energy chamber (b), and / or the third beam (113) defines a portion of the energy chamber (b) in which the heat exchange channel (14) is provided. The heat exchange channels (14) in the plurality of beam bodies (11) are connected, and the first direction, the second direction, and the third direction have an angle with each other.

3. The energy storage device according to claim 2, characterized in that, The beam body (11) further includes: a diagonal bracing beam, which extends obliquely between the first direction and the second direction and is connected to the first beam (111) and the second beam (112), or extends obliquely between the second direction and the third direction and is connected to the second beam (112) and the third beam (113), or extends obliquely between the first direction and the third direction and is connected to the first beam (111) and the third beam (113), and the heat exchange channel (14) is provided in the diagonal bracing beam located within the projection range of the energy chamber (b).

4. The energy storage device according to claim 2, characterized in that, The energy storage device further includes: a first cabinet door (20), which is operably disposed in the energy chamber (b), and a sealing part (30) is provided between the first cabinet door (20) and the first beam (111) and between the second beam (112).

5. The energy storage device according to claim 4, characterized in that, The heat exchange channel (14) is provided in the first beam (111) and the second beam (112) located on the side of the first cabinet door (20) for temperature regulation of the sealing part (30).

6. The energy storage device according to claim 5, characterized in that, At least one side of the cabinet (10) is provided with a rainproof eave (40), and the rainproof eave (40) is provided with a first spray section (41) that communicates with the heat exchange channel (14).

7. The energy storage device according to claim 6, characterized in that, There are multiple first spray units (41) and they are spaced apart on the rainproof eaves (40). The first spray unit (41) is constructed as a normally closed spray head and is configured to open when the temperature exceeds the temperature threshold or smoke is detected.

8. The energy storage device according to claim 2, characterized in that, The first beam (111), and / or the second beam (112), and / or the third beam (113) having the heat exchange channel (14) are also provided with a medium outlet communicating with the heat exchange channel (14), the medium outlet being used to discharge cooling medium for external cooling of the energy storage device.

9. The energy storage device according to claim 8, characterized in that, A second spray section (50) is provided on the medium outlet, and the second spray section (50) is adapted to spray cooling medium.

10. The energy storage device according to claim 9, characterized in that, There are multiple second spray sections (50), and each energy chamber (b) is provided with at least one second spray section (50). The second spray section (50) is constructed as a normally closed spray head and is configured to open when the temperature exceeds the temperature threshold or smoke is detected.

11. The energy storage device according to claim 4, characterized in that, The energy storage device further includes a second cabinet door, which is openably disposed in the electrical compartment (a) and is located on one side surface defined by the third beam (113) and the first beam (111).

12. An energy storage system, characterized in that, It includes a power conversion device and an energy storage device as described in any one of claims 1-11, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

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