Energy storage device and energy storage system

Abstract

The application provides an energy storage device and an energy storage system. The energy storage device comprises: a battery device; a box body having a cavity, the battery device being accommodated in the cavity, the box body comprising a wall plate participating in defining the cavity; a protection part arranged outside the box body, the protection part comprising a receiving mechanism and a shielding mechanism, the receiving mechanism being arranged on the wall plate, at least part of the shielding mechanism being arranged in the receiving mechanism, the shielding mechanism being configured to protrude from the receiving mechanism and cover at least part of the wall plate when the temperature is greater than or equal to a first threshold value, covering at least part of the wall plate by the shielding mechanism can block at least part of the flame in the box body from escaping to the outside, reduce the influence of the on-fire energy storage device on other energy storage devices, enhance the fireproof capability of the energy storage device, and / or covering at least part of the wall plate by the shielding mechanism can block at least part of the flame outside the box body from directly burning the box body, reduce the damage of the external flame to the energy storage device, enhance the fireproof capability of the energy storage device, and improve the reliability of the energy storage system.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to an energy storage device and an energy storage system. Background Technology

[0002] Containerized energy storage systems are complete energy storage devices that highly integrate battery cells, battery management systems, energy storage converters, temperature control systems, fire protection systems, and electrical equipment into a standard container.

[0003] The design of containerized energy storage systems should fully consider their safety protection capabilities under harsh conditions such as fire and ignition. Currently, the fire resistance of containerized energy storage systems still needs to be improved. Utility Model Content

[0004] In view of the above problems, this application provides an energy storage device and an energy storage system that can improve the fire resistance of the energy storage device and enhance the reliability of the energy storage system.

[0005] In a first aspect, this application provides an energy storage device, comprising: a battery device; a housing having a chamber in which the battery device is housed, the housing including a wall panel defining the chamber; and a protective portion disposed on the outside of the housing, the protective portion including a housing mechanism and a shielding mechanism, the housing mechanism being disposed on the wall panel, at least a portion of the shielding mechanism being disposed within the housing mechanism, the shielding mechanism being configured to extend out of the housing mechanism and cover at least a portion of the wall panel when the temperature is greater than or equal to a first threshold.

[0006] In the embodiments of this application, the energy storage device includes a battery device, a housing, and a protective section. The housing has a chamber for accommodating the battery device and includes a wall panel that helps define the chamber. The protective section is disposed on the outside of the housing to reduce the difficulty of installing and controlling the protective section. The protective section includes a storage mechanism and a shielding mechanism. At least a portion of the shielding mechanism is disposed within the storage mechanism to reduce the size of the protective section, reduce the difficulty of storing and transporting the protective section, and reduce the impact of the shielding section on the normal operation of the housing. The shielding mechanism is configured to extend out of the storage mechanism and cover at least a portion of the wall panel when the temperature is greater than or equal to a first threshold. By covering at least a portion of the wall panel with the shielding mechanism, at least a portion of the flame inside the housing can be prevented from escaping to the outside, thereby reducing the impact of the burning energy storage device on other energy storage devices and enhancing the fire resistance of the energy storage device. And / or by covering at least a portion of the wall panel with the shielding mechanism, at least a portion of the flame outside the housing can be prevented from directly burning the housing, thereby reducing the damage of external flames to the energy storage device, enhancing the fire resistance of the energy storage device, and improving the reliability of the energy storage system.

[0007] In some embodiments, the protective part further includes a fixing mechanism, the fixing mechanism and the storage mechanism being spaced apart, and the shielding mechanism being configured to extend out of the storage mechanism and connect to the fixing mechanism when the temperature is greater than or equal to a first threshold.

[0008] In the embodiment of this application, the shielding mechanism can be connected to the fixing mechanism after extending out of the storage mechanism. On the one hand, the fixing mechanism enhances the stability of the shielding mechanism, and on the other hand, it can reduce the risk of flames passing through the shielding mechanism away from the storage mechanism, which helps to improve the fire resistance of the energy storage device.

[0009] In some embodiments, the wall panel includes a top wall, a bottom wall, and a side wall, the top wall and the bottom wall being disposed opposite each other in the direction of gravity, the side wall being connected between the top wall and the bottom wall, and the shielding mechanism being configured to extend out of the storage mechanism and cover at least a portion of the side wall when the temperature is greater than or equal to a first threshold.

[0010] In the embodiment of this application, the shielding mechanism is configured to extend out of the receiving mechanism and cover at least part of the sidewall when the temperature is greater than or equal to a first threshold, so as to reliably reduce the impact of the flame on adjacent energy storage devices and improve the reliability of the energy storage system.

[0011] In some embodiments, the housing further includes functional components connected to and participating in the formation of a chamber, and the shielding mechanism is configured to extend out of the storage mechanism and cover at least a portion of the functional components and at least a portion of the sidewalls when the temperature is greater than or equal to a first threshold.

[0012] In the embodiment of this application, the enclosure also includes functional components connected to the sidewalls and participating in the formation of the chamber. The shielding mechanism can cover at least part of the functional components and at least part of the sidewalls to reduce the risk of flames passing through the connection gaps between the functional components and the sidewalls, which helps to enhance the fire resistance of the energy storage device and improve the reliability of the energy storage system.

[0013] In some embodiments, the sidewall includes four wall portions disposed opposite each other along the length direction of the housing and opposite each other along the width direction of the housing. The four wall portions include at least one first wall portion and at least one second wall portion. The first wall portion is equipped with a functional component, and the second wall portion is connected to the first wall portion. The shielding mechanism is configured to extend out of the storage mechanism when the temperature is greater than or equal to a first threshold and cover the first wall portion and at least one second wall portion adjacent to the first wall portion.

[0014] In the embodiment of this application, the shielding mechanism can cover the first wall portion to reduce the risk of internal flames escaping through the connection gap between the functional component and the side wall, and the risk of external flames directly burning the connection gap between the functional component and the side wall. The shielding mechanism also covers at least one second wall portion adjacent to the first wall portion to further reduce the risk of flames passing through the shielding mechanism in the gap between the side walls and enhance the fire resistance of the energy storage device.

[0015] In some embodiments, the functional component includes a pressure relief mechanism, and the shielding mechanism is configured to extend out of the housing mechanism and cover the pressure relief mechanism when the temperature is greater than or equal to a first threshold, and a gap is formed between the sidewall and the shielding mechanism. The housing mechanism is provided with a pressure relief channel that connects the gap and the external environment. Alternatively, the protective part also includes a fixing mechanism, and at least one of the housing mechanism and the fixing mechanism is provided with a pressure relief channel that connects the gap and the external environment.

[0016] In the embodiment of this application, the shielding mechanism can cover at least part of the pressure relief mechanism provided on the side wall to reduce the risk of flames inside the box escaping from the pressure relief mechanism and external flames entering the chamber from the pressure relief mechanism; at least one of the storage mechanism and the fixing mechanism is provided with a pressure relief channel, which connects the gap and the external environment, and the pressure inside the chamber can be released smoothly through the pressure relief channel and the pressure relief mechanism.

[0017] In some embodiments, the energy storage device includes two stacked boxes, the two boxes being a first box and a second box, the direction from the first box to the second box being the direction of gravity, a storage mechanism disposed in the first box, and a shielding mechanism configured to extend out of the storage mechanism when the temperature is greater than or equal to a first threshold and cover at least a portion of the wall panels of the first box and at least a portion of the wall panels of the second box.

[0018] In the embodiment of this application, the energy storage device includes two stacked boxes. A storage mechanism is disposed in the first box, and a shielding mechanism can cover at least a portion of the wall panels of the first box and at least a portion of the wall panels of the second box. A protective part can provide protection for the two boxes, which helps to reduce the installation difficulty and setting cost of the protective part.

[0019] In some embodiments, the housing mechanism includes a housing and a stop. The housing includes a receiving cavity for housing the shielding mechanism, at least one end of which is provided with an opening. The stop connects the housing and the shielding mechanism to stop the shielding mechanism. The stop is configured to disengage from the shielding mechanism when the temperature is greater than or equal to a first threshold, so that the shielding mechanism extends out of the opening.

[0020] In the embodiment of this application, the storage mechanism includes a housing and a stop. The shielding mechanism is located in the receiving cavity of the housing. The housing is used to provide storage and protection for the shielding mechanism. The stop is disposed at the opening of the receiving cavity. The stop is configured to disengage from the shielding mechanism when the temperature is greater than or equal to a first threshold, so that the shielding mechanism extends out of the opening and covers the wall panel to enhance the fire resistance of the energy storage device.

[0021] In some embodiments, the storage mechanism further includes a sensor for acquiring first temperature information, wherein the stop is configured to disengage from the shielding mechanism to release the shielding mechanism when the first temperature information is greater than or equal to a first threshold, and / or the stop is configured to melt to release the shielding mechanism when the temperature is greater than or equal to the first threshold.

[0022] In the embodiment of this application, the storage mechanism further includes a sensor, and the stop is configured to disengage from the shielding mechanism based on the first temperature information obtained by the sensor to release the shielding mechanism. On the one hand, the shielding mechanism can reliably extend when the temperature is greater than or equal to the first threshold, thereby enhancing the reliability of the protective part, and on the other hand, reducing the cost of setting up the protective part; and / or, the stop is configured to melt when the temperature is greater than or equal to the first threshold to release the shielding mechanism, so that the shielding mechanism can reliably extend when the temperature is greater than or equal to the first threshold, thereby enhancing the reliability of the protective part.

[0023] In some embodiments, the protective part further includes a fire-retardant coating disposed on at least a portion of the outer surface of the shielding mechanism.

[0024] In the embodiments of this application, at least a portion of the outer surface of the shielding mechanism is provided with a fire-retardant coating to enhance the fire resistance of the shielding mechanism.

[0025] Secondly, embodiments of this application provide an energy storage system, including the energy storage device of any of the embodiments of the first aspect described above. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 This is a schematic diagram of the battery device provided in the embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the battery module provided in the application embodiment;

[0029] Figure 3 This is a schematic diagram of the energy storage device provided in the embodiments of this application;

[0030] Figure 4 This is a schematic diagram of the extended shielding mechanism of the energy storage device provided in the embodiments of this application;

[0031] Figure 5 This is a schematic diagram of the extended portion of the shielding mechanism of an energy storage device provided in another embodiment of this application;

[0032] Figure 6 yes Figure 4 Partial sectional view at point AA;

[0033] Figure 7 This is a schematic diagram of the structure of an energy storage device provided in another embodiment of this application;

[0034] Figure 8 This is a schematic diagram of the extended shielding mechanism of an energy storage device according to another embodiment of this application;

[0035] Figure 9 This is a schematic diagram of the structure of an energy storage device provided in another embodiment of this application;

[0036] Figure 10 This is a schematic diagram of the extended shielding mechanism of an energy storage device according to another embodiment of this application;

[0037] Figure 11 This is a schematic diagram of the protective section of the energy storage device provided in the embodiments of this application;

[0038] Figure 12 This is a partial structural schematic diagram of the energy storage device provided in the embodiments of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Energy storage device;

[0041] 2. Battery assembly; 201. Battery module; 202. Housing; 2021. First housing section; 2022. Second housing section;

[0042] 3. Enclosure; 31. Wall panel; 311. Top wall; 312. Side wall; 32. Functional components; 321. Pressure relief mechanism; 313. First wall section; 314. Second wall section;

[0043] 4. Protective component; 41. Storage mechanism; 42. Shielding mechanism; 43. Fixing mechanism; 44. Pressure relief channel; 411. Outer shell; 412. Stopper; 413. Receiving cavity; 414. Sensor; 45. Fireproof coating;

[0044] 51. First box; 52. Second box. Detailed Implementation

[0045] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0047] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0048] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0049] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0050] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0051] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0052] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0053] 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.

[0054] 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.

[0055] In the embodiments of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 85°-95°, the two directions can be considered perpendicular; if the angle between two directions is 0°-5°, the two directions can be considered parallel.

[0056] In this application, "multiple" means two or more (including two).

[0057] This application provides an energy storage device including one or more battery devices to increase the voltage and capacity of the energy storage device. When the energy storage device includes multiple battery devices, the multiple battery devices are connected in parallel to increase the capacity of the energy storage device. Each battery device may include multiple individual battery cells, which are connected in series or in parallel.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0062] In some embodiments, the energy storage device may include a housing and one or more battery devices housed within the housing.

[0063] In some embodiments, the energy storage device may include modules such as thermal management components, main control module, central control module, power distribution module, and fire protection components.

[0064] As an example, the thermal management component may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0065] 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.

[0066] 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 an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0067] 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.

[0068] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0069] Containerized energy storage systems are complete energy storage devices that highly integrate individual battery cells, battery management systems, energy storage converters, temperature control systems, fire protection systems, and electrical equipment within a standard shipping container. The design of containerized energy storage systems must fully consider their safety protection capabilities under harsh conditions such as fires and ignition. Currently, the fire resistance of containerized energy storage systems still needs improvement.

[0070] In related technologies, the fire protection design of energy storage containers relies solely on their own structural support. In the event of a fire inside the energy storage container, the flames can easily spread to adjacent containers. In the event of a fire outside the container, the flames can directly burn the container and easily damage the battery devices inside.

[0071] Based on the above-mentioned problems, embodiments of this application provide an energy storage device, which includes a battery device, a housing, and a protective section. The housing has a chamber for accommodating the battery device and includes a wall panel that helps define the chamber. The protective section is disposed on the outside of the housing to reduce the difficulty of installing and controlling the protective section. The protective section includes a storage mechanism and a shielding mechanism. At least a portion of the shielding mechanism is disposed within the storage mechanism to reduce the size of the protective section, reduce the difficulty of storing and transporting the protective section, and reduce the impact of the shielding section on the normal operation of the housing. The shielding mechanism is configured to extend out of the storage mechanism and cover at least a portion of the wall panel when the temperature is greater than or equal to a first threshold. By covering at least a portion of the wall panel with the shielding mechanism, at least a portion of the flame inside the housing can be prevented from escaping to the outside, thereby reducing the impact of the burning energy storage device on other energy storage devices and enhancing the fire resistance of the energy storage device. And / or by covering at least a portion of the wall panel with the shielding mechanism, at least a portion of the flame outside the housing can be prevented from directly burning the housing, thereby reducing the damage of external flames to the energy storage device, enhancing the fire resistance of the energy storage device, and improving the reliability of the energy storage system.

[0072] Figure 1 A schematic diagram of the structure of a battery device 2 according to an embodiment of this application is shown.

[0073] The battery device 2 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, which are connected in series, parallel, or mixed connections via a busbar.

[0074] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0075] As an example, the battery cell assembly can be a battery module 201, which is formed by arranging and fixing multiple battery cells into an independent module. As an example, the battery module 201 can be formed by bundling multiple battery cells together with cable ties.

[0076] In some embodiments, the battery device 2 may be a battery pack, which includes a housing 202 and one or more battery cell assemblies, the battery cell assemblies being housed in the housing 202.

[0077] As an example, the battery cell assembly can be a battery module 201, which can be housed in the housing 202 by fixing the battery module 201 in the housing 202.

[0078] As an example, the battery cell assembly can also be housed in the housing 202 by directly fixing multiple battery cells to the housing 202.

[0079] As an example, the housing 202 may include a first housing portion 2021 and a second housing portion 2022. The first housing portion 2021 and the second housing portion 2022 are fastened together, forming a closed space inside the housing 202 to accommodate the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing portion 2021 may be an end cap or a bottom plate.

[0080] As an example, housing 202 may include end caps, a frame, and a base plate. The end caps and the base plate are respectively connected to the frame, so that the interior of housing 202 forms an enclosed space to accommodate the battery cell assembly.

[0081] In some embodiments, the housing 202 may be part of the vehicle's chassis structure. For example, a portion of the housing 202 may be at least a portion of the vehicle's floor, or a portion of the housing 202 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0082] Figure 2 A schematic diagram of the structure of a battery module 201 according to an embodiment of this application is shown.

[0083] In some embodiments, such as Figure 1 and Figure 2 As shown, there are multiple battery cells, which are first connected in series, parallel, or mixed to form a battery module 201. The multiple battery modules 201 are then connected in series, parallel, or mixed to form a whole, which is housed in the casing 202.

[0084] Multiple battery cells in the battery module 201 can be electrically connected through a busbar component to achieve parallel, series, or mixed connection of multiple battery cells in the battery module 201.

[0085] Please see Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the energy storage device provided in the embodiments of this application; Figure 4 This is a schematic diagram of the extended shielding mechanism of the energy storage device provided in the embodiments of this application.

[0086] Firstly, such as Figure 1 , Figure 3 and Figure 4 As shown, this application provides an energy storage device 1, which includes a battery device 2, a housing 3, and a protective part 4. The housing 3 has a chamber in which the battery device 2 is housed. The housing 3 includes a wall panel 31 that defines the chamber. The protective part 4 is disposed on the outside of the housing 3 and includes a storage mechanism 41 and a shielding mechanism 42. The storage mechanism 41 is disposed on the wall panel 31, and at least a portion of the shielding mechanism 42 is disposed within the storage mechanism 41. The shielding mechanism 42 is configured to extend out of the storage mechanism 41 and cover at least a portion of the wall panel 31 when the temperature is greater than or equal to a first threshold.

[0087] In the embodiment of this application, the energy storage device 1 includes a battery device 2, a housing 3, and a protective part 4. The housing 3 has a chamber for accommodating the battery device 2 and includes a wall panel 31 that defines the chamber. The protective part 4 is disposed on the outside of the housing 3 to reduce the difficulty of installation and control. The protective part 4 includes a storage mechanism 41 and a shielding mechanism 42. At least a portion of the shielding mechanism 42 is disposed within the storage mechanism 41 to reduce the size of the protective part 4, reduce the difficulty of storage and transportation of the protective part 4, and reduce the impact of the shielding part on the normal operation of the housing 3. The shielding mechanism 42 is configured to operate within a temperature range. When the intensity is greater than or equal to the first threshold, it extends out of the storage mechanism 41 and covers at least part of the wall panel 31. The shielding mechanism 42 can cover at least part of the wall panel 31 to prevent at least part of the flame inside the box 3 from escaping to the outside, thereby reducing the impact of the burning energy storage device 1 on other energy storage devices 1, enhancing the fire resistance of the energy storage device 1, and / or the shielding mechanism 42 can cover at least part of the wall panel 31 to prevent at least part of the flame outside the box 3 from directly burning the box 3, thereby reducing the damage of the external flame to the energy storage device 1, enhancing the fire resistance of the energy storage device 1, and improving the reliability of the energy storage system.

[0088] Optionally, one or more battery devices 2 may be installed in the chamber of a single housing 3. For example, the chamber may contain 1, 16, 32, 64, 100, 500, or 1000 battery devices 2.

[0089] Optionally, the protective part 4 is located on the outside of the housing 3, which means that the protective part 4 is installed on the side of the wall panel 31 away from the chamber. On the one hand, the protective part 4 will not occupy the space inside the chamber, which helps to improve the energy density of the energy storage device 1. On the other hand, the protective part 4 located on the outside is also convenient to be activated when there is a fire source inside or outside the housing 3, and reduces the difficulty of its maintenance and replacement.

[0090] Optionally, the storage mechanism 41 is fixedly connected to the wall panel 31 to enhance the reliability of the connection between the storage mechanism 41 and the wall. For example, the storage mechanism 41 and the wall panel 31 are integrally formed, or the storage mechanism 41 and the wall panel 31 are welded together, etc.

[0091] Optionally, the storage mechanism 41 can be detachably connected to the wall panel 31 to facilitate maintenance and replacement of the storage unit. For example, the storage mechanism 41 can be snap-fitted to the wall panel 31 or bolted to it.

[0092] Optionally, the shielding mechanism 42 is disposed within the storage mechanism 41 in a stacked or rolled manner. When the temperature is greater than or equal to a first threshold, the shielding mechanism 42 extends out of the storage mechanism 41 and covers at least a portion of the outer surface of the wall panel 31. For example, the shielding mechanism 42 is a fireproof roller shutter. For example, the shielding mechanism 42 and the storage mechanism 41 are detachably connected to reduce the maintenance cost of the protective section 4.

[0093] Optionally, when the temperature is below the first threshold, i.e., when the shielding mechanism 42 is in a non-operating state, at least a portion of the shielding mechanism 42 is located within the housing mechanism 41 to reduce the volume of the protective part 4 and decrease the impact of the protective part 4 on the energy storage device 1. For example, when the temperature is below the first threshold, the entire shielding mechanism 42 is located within the housing mechanism 41.

[0094] Optionally, the specific value of the first threshold can be designed according to actual conditions. For example, the storage mechanism 41 further includes a temperature sensor, and the first threshold is the ambient temperature collected by the temperature sensor. When the ambient temperature collected by the temperature sensor is greater than or equal to the first threshold, the shielding mechanism 42 extends out of the storage mechanism 41. Alternatively, the storage mechanism 41 includes a stop member, which is used to stop at least part of the shielding mechanism 42 within the storage mechanism 41 when the temperature is less than the first threshold. When the surface temperature of the stop member is greater than or equal to the first threshold, the stop member moves or melts to allow the shielding mechanism 42 to extend out of the storage mechanism 41.

[0095] Optionally, when the temperature is greater than or equal to a first threshold, the shielding mechanism 42 extends out of the storage mechanism 41 to cover at least a portion of the wall panel 31.

[0096] For example, in the event of a fire inside the housing 3, the temperature of the housing 3 gradually increases and conducts the high temperature to the protective part 4. When the temperature is greater than or equal to the first threshold, the shielding mechanism 42 extends out of the storage mechanism 41 and covers the wall panel 31 to prevent the flames inside the housing 3 from escaping and burning other energy storage devices 1.

[0097] For example, in the event of a fire outside the energy storage device 1, when the temperature of the external fire source heating protection part 4 is greater than or equal to a first threshold, the shielding mechanism 42 extends out of the storage mechanism 41 and covers the wall panel 31 to prevent the external flames of the housing 3 from directly burning the energy storage device 1.

[0098] For example, the shielding mechanism 42 extends out of the storage mechanism 41 and covers the entire outer surface of the wall panel 31 to enhance the protection of the energy storage device 1.

[0099] For example, the shielding mechanism 42 extends out of the storage mechanism 41 under the action of gravity, which has a simple structure and high reliability; or the storage mechanism 41 is provided with an elastic element, and the shielding mechanism 42 extends out of the storage mechanism 41 under the action of elastic force, which helps to improve the extension speed of the shielding mechanism 42.

[0100] Optionally, the energy storage device 1 includes one or more protective parts 4. For example, the number of protective parts 4 can be 1, 2, 3, 4, 5, etc.

[0101] Optionally, the melting point of the shielding mechanism 42 can be designed according to the actual situation, and the melting point of the shielding mechanism 42 should be greater than the first threshold.

[0102] In some embodiments, such as Figure 3 and Figure 4 As shown, the protective part 4 also includes a fixing mechanism 43, which is spaced apart from the storage mechanism 41. The shielding mechanism 42 is configured to extend out of the storage mechanism 41 and connect to the fixing mechanism 43 when the temperature is greater than or equal to a first threshold.

[0103] In these embodiments, the shielding mechanism 42 can be connected to the fixing mechanism 43 after extending out of the storage mechanism 41. On the one hand, the fixing mechanism 43 enhances the stability of the shielding mechanism 42, and on the other hand, it can reduce the risk of flames passing through the shielding mechanism 42 away from the storage mechanism 41, which helps to improve the fire resistance of the energy storage device 1.

[0104] Optionally, one of the fixing mechanism 43 and the shielding mechanism 42 is provided with a locking block, and the other of the fixing mechanism 43 and the shielding mechanism 42 is provided with a locking slot, and the locking block and the locking slot are connected by a locking mechanism.

[0105] Optionally, one of the fixing mechanism 43 and the shielding mechanism 42 is provided with a first magnetic element, and the other of the fixing mechanism 43 and the shielding mechanism 42 is provided with a second magnetic element, and the first magnetic element and the second magnetic element are magnetically connected.

[0106] Optionally, the fixing mechanism 43 extends continuously in the extending direction of the receiving mechanism 41 so that the shielding mechanism 42 and the fixing mechanism 43 can form a continuous connection interface after being combined, reducing the risk of flames escaping from the gap between the fixing mechanism 43 and the shielding mechanism 42.

[0107] Optionally, the connection between the fixing mechanism 43 and the wall panel 31 can be by snap-fit, welding or threaded connection, etc.

[0108] In some embodiments, such as Figure 3 and Figure 4 As shown, the wall panel 31 includes a top wall 311, a bottom wall (not shown) and a side wall 312. The top wall 311 and the bottom wall are arranged opposite each other along the direction of gravity. The side wall 312 is connected between the top wall 311 and the bottom wall. The shielding mechanism 42 is configured to extend out of the storage mechanism 41 and cover at least part of the side wall 312 when the temperature is greater than or equal to a first threshold.

[0109] In these embodiments, the shielding mechanism 42 is configured to extend out of the receiving mechanism 41 and cover at least a portion of the sidewall 312 when the temperature is greater than or equal to a first threshold, so as to reliably reduce the impact of the flame on the adjacent energy storage device 1 and improve the reliability of the energy storage system.

[0110] An energy storage system typically includes multiple energy storage devices 1 arranged in a distributed manner, with each energy storage device 1 arranged adjacent to each other in the circumferential direction. Therefore, in this embodiment, the shielding mechanism 42 can cover at least a portion of the sidewall 312 when the temperature is greater than or equal to a first threshold. That is, when the temperature is greater than or equal to the first threshold, the shielding mechanism 42 extends between two adjacent energy storage devices 1 to prevent the flame from directly burning other adjacent energy storage devices 1.

[0111] For example, in the event of a fire inside the housing 3 of the target energy storage device 1, the shielding mechanism 42 of the target energy storage device 1 extends and covers the side wall 312 to prevent flames from escaping from the target energy storage device 1; and the shielding mechanism 42 of the adjacent energy storage device 1 can also extend and cover the side wall 312 under high temperature, further reducing the risk of damage to the adjacent energy storage device 1.

[0112] Optionally, the storage mechanism 41 and the fixing mechanism 43 are respectively disposed at the two ends of the side wall 312 along the direction of gravity, so that the shielding mechanism 42 can shield a larger area of ​​the side wall 312. For example, the direction in which the storage mechanism 41 points toward the fixing mechanism 43 is parallel to the direction of gravity, so as to facilitate the smooth extension of the shielding mechanism 42.

[0113] Optionally, the storage mechanism 41 is located on the side wall 312, which helps to reduce the size of the energy storage device 1 in the direction of gravity and does not affect the stacking arrangement of the housing 3; and / or the storage mechanism 41 is located on the top wall 311 to obtain a larger installation area and reduce the difficulty of installation.

[0114] Optionally, the shielding mechanism 42 is configured to extend out of the storage mechanism 41 and cover the entire sidewall 312 when the temperature is greater than or equal to a first threshold.

[0115] In some embodiments, such as Figure 3 and Figure 4 As shown, the housing 3 also includes a functional component 32, which is connected to the side wall 312 and participates in forming a chamber. The shielding mechanism 42 is configured to extend out of the storage mechanism 41 and cover at least part of the functional component 32 and at least part of the side wall 312 when the temperature is greater than or equal to a first threshold.

[0116] In these embodiments, the housing 3 also includes a functional component 32 connected to the side wall 312 and participating in the formation of the chamber. The shielding mechanism 42 can cover at least part of the functional component 32 and at least part of the side wall 312 to reduce the risk of flames passing through the connection gap between the functional component 32 and the side wall 312, which helps to enhance the fire resistance of the energy storage device 1 and improve the reliability of the energy storage system.

[0117] Functional component 32 and side wall 312 are connected and together form a chamber. There is a connection interface between functional component 32 and side wall 312. Flames inside the housing 3 can easily escape through this connection interface, or flames outside the housing 3 can easily enter through this connection interface. Therefore, in this embodiment, the shielding mechanism 42 can cover at least part of the functional component 32 and at least part of the side wall 312, that is, the shielding mechanism 42 can cover at least part of the connection interface, so as to reduce the risk of flames passing through the connection interface and improve the fire resistance of the energy storage device 1.

[0118] Optionally, the functional component 32 can be a pressure relief mechanism 321 or a door panel, etc.

[0119] Optionally, the shielding mechanism 42 can cover the entire connection interface between the functional component 32 and the side wall 312.

[0120] Please see Figure 5 , Figure 5 This is a schematic diagram of the extended portion of the shielding mechanism of an energy storage device provided in another embodiment of this application.

[0121] In some embodiments, such as Figures 3 to 5As shown, the side wall 312 includes two wall portions arranged opposite each other along the length direction of the box body 3 and two wall portions arranged opposite each other along the width direction of the box body 3. The four wall portions include at least one first wall portion 313 and at least one second wall portion 314. The first wall portion 313 is equipped with a functional component 32, and the second wall portion 314 is connected to the first wall portion 313. The shielding mechanism 42 is configured to extend out of the storage mechanism 41 when the temperature is greater than or equal to a first threshold and cover the first wall portion 313 and at least one second wall portion 314 adjacent to the first wall portion 313.

[0122] In these embodiments, the shielding mechanism 42 can cover the first wall portion 313 to reduce the risk of internal flames escaping through the connection gap between the functional component 32 and the side wall 312, and the risk of external flames directly burning the connection gap between the functional component 32 and the side wall 312. The shielding mechanism 42 also covers at least one second wall portion 314 adjacent to the first wall portion 313 to further reduce the risk of flames passing through the shielding mechanism 42 in the gap of the side wall 312, thereby enhancing the fire resistance of the energy storage device 1.

[0123] For example, the side wall 312 includes a first sub-wall portion and a second sub-wall portion disposed opposite to each other along the length direction of the housing 3, and also includes a third sub-wall portion and a fourth sub-wall portion disposed opposite to each other along the width direction of the housing 3. The functional component 32 is disposed on the first sub-wall portion, in which case the first sub-wall portion is the first wall portion 313, and the second, third, and fourth sub-wall portions are all second wall portions 314. In this case, the shielding mechanism 42 can cover the first sub-wall portion and at least one of the third and fourth sub-wall portions. Alternatively, if the functional component 32 is disposed on the first and second sub-wall portions, then the first and second sub-wall portions are all first wall portions 313, and the third and fourth sub-wall portions are all second wall portions 314. In this case, the shielding mechanism 42 can cover the first and second sub-wall portions and at least one of the third and fourth sub-wall portions. Alternatively, if the functional component 32 is disposed on the first sub-wall portion and the third sub-wall portion, then the first sub-wall portion and the third sub-wall portion are both first wall portions 313, and the second sub-wall portion and the fourth sub-wall portion are both second wall portions 314, then the shielding mechanism 42 can cover at least one of the first sub-wall portion and the third sub-wall portion, as well as the second sub-wall portion and the fourth sub-wall portion.

[0124] Optionally, shielding mechanisms 42 located on two adjacent walls extend beyond the receiving mechanism 41, with the two shielding mechanisms 42 fitting together to reduce the risk of flames escaping or entering through the connection gap between the two shielding mechanisms 42. Exemplarily, the outer surface of the extended shielding mechanism 42 includes a first surface, a second surface, and a ramp. The first and second surfaces are disposed opposite each other along the thickness direction of the shielding mechanism 42, with the second surface located between the first surface and the side wall 312. The width of the second surface is smaller than the width of the first surface. One end of the ramp connects to the edge of the second surface in its width direction, and the other end extends obliquely along the thickness direction to the edge of the first surface in its width direction. The shielding mechanisms 42 located on two adjacent walls extend beyond the receiving mechanism 41, with the ramps of the two shielding mechanisms 42 fitting together.

[0125] Please see Figure 6 , Figure 6 yes Figure 4 Partial sectional view at point AA.

[0126] In some embodiments, such as Figure 3 , Figure 4 and Figure 6 As shown, the functional component 32 includes a pressure relief mechanism 321. The shielding mechanism 42 is configured to extend out of the housing mechanism 41 and cover the pressure relief mechanism 321 when the temperature is greater than or equal to a first threshold. A gap is formed between the side wall 312 and the shielding mechanism 42. The housing mechanism 41 is provided with a pressure relief channel 44, which connects the gap and the external environment. Alternatively, the protective part 4 also includes a fixing mechanism 43. At least one of the housing mechanism 41 and the fixing mechanism 43 is provided with a pressure relief channel 44, which connects the gap and the external environment.

[0127] In these embodiments, the shielding mechanism 42 can cover at least part of the pressure relief mechanism 321 disposed on the side wall 312 to reduce the risk of flames inside the housing 3 escaping from the pressure relief mechanism 321 and external flames entering the chamber from the pressure relief mechanism 321; at least one of the storage mechanism 41 and the fixing mechanism 43 is provided with a pressure relief channel 44, which connects the gap and the external environment, and the pressure inside the chamber can be smoothly released through the pressure relief channel 44 and the pressure relief mechanism 321.

[0128] Optionally, the pressure relief mechanism 321 is configured to be actuated to release the pressure in the chamber when the pressure in the chamber reaches a threshold. For example, the pressure relief mechanism 321 may be a burst plate or a pressure relief valve, etc.

[0129] With the shielding mechanism 42 extending and covering the side wall 312, the shielding mechanism 42 is spaced apart from the side wall 312 and the pressure relief mechanism 321 to form a gap. When the pressure relief mechanism 321 releases pressure, the high-temperature and high-pressure gas in the chamber enters the gap through the pressure relief mechanism 321. If at least one of the receiving mechanism 41 and the fixing mechanism 43 is provided with a pressure relief channel 44, the high-temperature and high-pressure gas entering the gap can be discharged to the external environment through the pressure relief channel 44.

[0130] Optionally, the storage mechanism 41 includes a housing 411 for housing the shielding mechanism 42, with a pressure relief channel 44 penetrating through the housing 411 to connect the gap to the external environment; or the storage mechanism 41 includes a conduit connected to the housing 411, which serves as the pressure relief channel 44 to connect the gap to the external environment.

[0131] Optionally, the sidewall 312 includes a first end and a second end arranged along the direction of gravity. A housing mechanism 41 is disposed at the first end, and a pressure relief channel 44 is disposed at the housing mechanism 41. This is intended to release high-temperature, high-pressure gas in the direction toward the top wall 311, reducing the risk that the high-temperature, high-pressure gas may directly burn adjacent energy storage devices 1 and cause damage to them. For example, the opening of the pressure relief channel 44 is disposed on the side of the housing mechanism 41 away from the second end, further reducing the risk that the high-temperature, high-pressure gas may affect adjacent energy storage devices 1.

[0132] Optionally, the fixing mechanism 43 is provided at the second end so that when the high-temperature and high-pressure gas is depressurized through the depressurization channel 44 provided in the fixing mechanism 43, the risk of the high-temperature and high-pressure gas directly burning the adjacent energy storage device 1 and causing damage to the energy storage device 1 is reduced.

[0133] Please see Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of the structure of an energy storage device provided in another embodiment of this application; Figure 8 This is a schematic diagram of the shielding mechanism extending from another embodiment of the energy storage device provided in this application.

[0134] In some embodiments, such as Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, the energy storage device 1 includes two stacked boxes 3, namely a first box 51 and a second box 52. The direction from the first box 51 to the second box 52 is the direction of gravity. Both the first box 51 and the second box 52 are provided with protective parts 4. A shielding mechanism 42 disposed on the first box 51 is configured to extend out of the receiving mechanism 41 when the temperature is greater than or equal to a first threshold, and cover at least a portion of the wall panel 31 of the first box 51. Similarly, a shielding mechanism 42 disposed on the second box 52 is configured to extend out of the receiving mechanism 41 when the temperature is greater than or equal to the first threshold, and cover at least a portion of the wall panel 31 of the second box 52. This reduces the processing difficulty of the protective parts 4 and, by shortening the size of the shielding mechanism 42, helps to improve the response speed of the protective parts 4 and enhance the fire resistance of the energy storage device 1.

[0135] Optionally, the protective part 4 includes a storage mechanism 41 and a fixing mechanism 43. For the protective part 4 located in the first housing 51, the pressure relief channel 44 is provided with the storage mechanism 41. For the protective part 4 located in the second housing 52, the pressure relief channel 44 is provided with the fixing mechanism 43, so as to reduce the risk of high temperature and high pressure gas directly burning the adjacent energy storage device 1 and causing damage to the energy storage device 1.

[0136] Please see Figure 9 and Figure 10 , Figure 9 This is a schematic diagram of the structure of an energy storage device provided in another embodiment of this application; Figure 10 This is a schematic diagram of the shielding mechanism extending from another embodiment of the energy storage device provided in this application.

[0137] In some embodiments, such as Figure 3 , Figure 4 , Figure 9 and Figure 10 As shown, the energy storage device 1 includes two stacked boxes 3, which are a first box 51 and a second box 52, respectively. The direction from the first box 51 to the second box 52 is the direction of gravity. A storage mechanism 41 is disposed on the first box 51. A shielding mechanism 42 is configured to extend out of the storage mechanism 41 when the temperature is greater than or equal to a first threshold and cover at least a portion of the wall panel 31 of the first box 51 and at least a portion of the wall panel 31 of the second box 52.

[0138] In these embodiments, the energy storage device 1 includes two stacked boxes 3, a storage mechanism 41 is disposed on the first box 51, and a shielding mechanism 42 is capable of covering at least a portion of the wall panels 31 of the first box 51 and at least a portion of the wall panels 31 of the second box 52. The two boxes 3 can be protected by a protective part 4, which helps to reduce the installation difficulty and setting cost of the protective part 4.

[0139] Optionally, the shielding mechanism 42 is configured to extend out of the storage mechanism 41 when the temperature is greater than or equal to a first threshold, and cover at least a portion of the sidewall 312 of the first housing 51 and at least a portion of the sidewall 312 of the second housing 52. Exemplarily, the shielding mechanism 42 is configured to extend out of the storage mechanism 41 when the temperature is greater than or equal to the first threshold, and cover the entire sidewall 312 of the first housing 51 and the second housing 52.

[0140] Optionally, the storage mechanism 41 is disposed at one end of the first box 51 away from the second box 52, and the fixing mechanism 43 is disposed at one end of the second box 52 away from the first box 51, so that the shielding mechanism 42 can fully cover the side walls 312 of the first box 51 and the second box 52.

[0141] Optionally, the pressure relief channel 44 is provided in the receiving mechanism 41 to reduce the risk of high-temperature and high-pressure gas directly burning the adjacent energy storage device 1, causing damage to the energy storage device 1.

[0142] Please see Figure 11 , Figure 11 This is a schematic diagram of the protective section of the energy storage device provided in the embodiments of this application.

[0143] In some embodiments, such as Figure 3 , Figure 4 and Figure 11 As shown, the storage mechanism 41 includes a housing 411 and a stop 412. The housing 411 includes a receiving cavity 413 for receiving the shielding mechanism 42. At least one end of the receiving cavity 413 is provided with an opening. The stop 412 connects the housing 411 and the shielding mechanism 42 to stop the shielding mechanism 42. The stop 412 is configured to disengage from the shielding mechanism 42 when the temperature is greater than or equal to a first threshold, so that the shielding mechanism 42 extends out of the opening.

[0144] In these embodiments, the housing mechanism 41 includes a housing 411 and a stop 412. The shielding mechanism 42 is located within the receiving cavity 413 of the housing 411. The housing 411 provides housing and protection for the shielding mechanism 42. The stop 412 is disposed at the opening of the receiving cavity 413. The stop 412 is configured to disengage from the shielding mechanism 42 when the temperature is greater than or equal to a first threshold, so that the shielding mechanism 42 extends out of the opening and covers the wall panel 31 to enhance the fire resistance of the energy storage device 1.

[0145] Optionally, when the temperature is below a first threshold, the stop 412 stops the shielding mechanism 42 to reduce the impact of the protective part 4 on the energy storage device 1. For example, the stop 412 can enclose at least part of the shielding mechanism 42 within the storage mechanism 41 to reduce the risk of the shielding mechanism 42 interfering with the door panel of the housing 3.

[0146] Optionally, the connection between the stop 412 and the shielding mechanism 42 can be by snap-fit, bolt connection, abutment, wire harness winding, sleeve connection, etc.

[0147] Optionally, by placing the stop 412 within the receiving cavity 413 to stop the shielding mechanism 42, the housing 411 provides protection for the stop 412, which helps to extend the service life of the stop 412. For example, the stop 412 can be a snap-fit ​​component or a wire harness, etc., disposed within the receiving cavity 413.

[0148] Optionally, by placing the stop 412 in the opening to block the shielding mechanism 42 within the receiving cavity 413, a larger operating space is provided at the opening, which helps to reduce the difficulty of setting the stop 412. For example, the stop 412 may be plate-shaped to close the opening; or the stop 412 may be composed of a plurality of spaced-apart stop blocks.

[0149] Optionally, the stop 412 and the shielding mechanism 42 may be disengaged by the stop 412 being translated or rotated to another position to disengage from the shielding mechanism 42, or by the stop 412 being disengaged from the housing 411 to release the shielding mechanism 42, or by the stop 412 being melted to release the shielding mechanism 42.

[0150] Optionally, the protective part 4 also includes a fixing mechanism 43, and the receiving cavity 413 is provided with an opening at one end facing the fixing mechanism 43 to facilitate the connection between the shielding mechanism 42 extending out of the receiving cavity 413 and the fixing mechanism 43.

[0151] Optionally, the housing 411 includes a first opening and a second opening that are connected. The shielding mechanism 42 extends out of the receiving cavity 413 through the first opening. The second opening is connected to the receiving cavity 413 and the external environment. The second opening is connected to the gap through the first opening and the receiving cavity 413. The first opening, the second opening and the receiving cavity 413 form a pressure relief channel 44.

[0152] In some embodiments, such as Figure 3 , Figure 4 and Figure 11 As shown, the storage mechanism 41 also includes a sensor 414, which is used to acquire first temperature information. The stop member 412 is configured to disengage from the shielding mechanism 42 to release the shielding mechanism 42 when the first temperature information is greater than or equal to a first threshold. On the one hand, the shielding mechanism 42 can reliably extend when the temperature is greater than or equal to the first threshold, enhancing the reliability of the protective part 4. On the other hand, it reduces the cost of setting up the protective part 4.

[0153] For example, sensor 414 is disposed on the outer surface of housing 411 to facilitate sensor 414 in acquiring ambient temperature. For example, sensor 414 is an infrared temperature sensor 414.

[0154] Optionally, the stop 412 is movably connected to the housing 411 and disposed at the opening. When the first temperature information is greater than or equal to the first threshold, the stop 412 moves relative to the housing 411 to open the opening, allowing the shielding mechanism 42 to extend. For example, the stop 412 and the housing 411 are pivotally connected, and the stop 412 rotates relative to the housing 411 to open the opening when the first temperature information is greater than or equal to the first threshold; or the stop 412 and the housing 411 are connected via a sliding block, and the stop 412 translates relative to the housing 411 to open the opening when the first temperature information is greater than or equal to the first threshold.

[0155] Optionally, the stop 412 is disposed within the receiving cavity 413. One of the stop 412 and the shielding mechanism 42 is provided with a first connecting member, and the other is provided with a second connecting member. When the first temperature information is greater than or equal to a first threshold, the first and second connecting members disengage to release the shielding mechanism 42. For example, the first and second connecting members are respectively a snap-fit ​​and a slot; or the first and second connecting members are respectively a threaded sleeve and a threaded post; or the first and second connecting members are respectively a wire harness sleeve and a limiting rod.

[0156] Optionally, the storage mechanism 41 also includes a drive unit, which is electrically connected to the sensor 414 and the stop 412. The drive unit moves the stop 412 based on the first temperature information to release the shielding mechanism 42.

[0157] In some embodiments, such as Figure 3 , Figure 4 and Figure 11 As shown, the stop 412 is configured to melt when the temperature is greater than or equal to a first threshold to release the shielding mechanism 42. This allows the shielding mechanism 42 to reliably extend when the temperature is greater than or equal to the first threshold, enhancing the reliability of the protective part 4.

[0158] Optionally, when the stop 412 is provided in an opening, the stop 412 melts entirely to open the opening when the temperature is greater than or equal to a first threshold; or the stop 412 includes a first part and a second part, the first part being movably connected to the housing 411, and the second part being connected to the first part and the housing 411, the second part melting when the temperature is greater than or equal to the first threshold, so that the first part can move relative to the housing 411 to open the opening.

[0159] Optionally, if the stop 412 is disposed within the receiving cavity 413, the stop 412 melts to release the shielding mechanism 42 when the temperature is greater than or equal to the first threshold.

[0160] For example, the material of the stop 412 may include zinc alloy, aluminum alloy or magnesium alloy.

[0161] Please see Figure 12 , Figure 12 This is a partial structural schematic diagram of the energy storage device provided in the embodiments of this application.

[0162] In some embodiments, such as Figure 3 , Figure 4 and Figure 12 As shown, the protective part 4 also includes a fire-retardant coating 45, which is disposed on at least a portion of the outer surface of the shielding mechanism 42. By providing the fire-retardant coating 45 on at least a portion of the outer surface of the shielding mechanism 42, the fire resistance of the shielding mechanism 42 is enhanced.

[0163] Optionally, the shielding mechanism 42 is provided with a fire-retardant coating 45 on both sides of its thickness to enhance the fire resistance of the shielding mechanism 42. For example, the fire-retardant coating 45 can be an aerogel heat-insulating coating, a thick-film epoxy fire-retardant coating layer, a polysiloxane topcoat layer, etc.

[0164] Optionally, the fire-retardant coating 45 can be a fire-retardant insulating layer, so that the shielding structure has both fire-retardant and insulating functions. For example, the fire-retardant insulating layer can be a ceramicized silicone rubber layer, a ceramicized silicone resin layer, a modified organosilicon resin, etc.

[0165] Secondly, embodiments of this application provide an energy storage system, including the energy storage device of any of the embodiments of the first aspect described above.

[0166] In some embodiments, such as Figures 1 to 11As shown, the energy storage device 1 includes a battery device 2, a housing 3, and a protective part 4. The housing 3 has a chamber in which the battery device 2 is housed. The housing 3 includes a wall panel 31 that defines the chamber. The wall panel 31 includes a top wall 311, a bottom wall, and a side wall 312. The top wall 311 and the bottom wall are arranged opposite each other along the direction of gravity, and the side wall 312 connects the top wall 311 and the bottom wall. The protective part 4 is located on the outside of the housing 3. The protective part 4 includes a storage mechanism 41, a shielding mechanism 42, a fixing mechanism 43, and a fire-retardant coating 45. The storage mechanism 41 is located on the wall panel 31. The fixing mechanism 43 and the storage mechanism 41 are spaced apart. At least a portion of the shielding mechanism 42 is located inside the storage mechanism 41, and the fire-retardant coating 45 is located outside the shielding mechanism 42. On the surface, the shielding mechanism 42 is configured to extend from the receiving mechanism 41 covering the sidewall 312 when the temperature is greater than or equal to a first threshold and to be connected to the fixing mechanism 43. The receiving mechanism 41 includes a housing 411, a stop 412 and a sensor 414. The housing 411 includes a receiving cavity 413 for receiving the shielding mechanism 42. At least one end of the receiving cavity 413 is provided with an opening. The stop 412 connects the housing 411 and the shielding mechanism 42 to stop the shielding mechanism 42. The stop 412 is configured to disengage from the shielding mechanism 42 to release the shielding mechanism 42 when the first temperature information is greater than or equal to the first threshold, and / or the stop 412 is configured to melt to release the shielding mechanism 42 when the temperature is greater than or equal to the first threshold.

[0167] In these embodiments, the energy storage device 1 includes a battery device 2, a housing 3, and a protective section 4. The housing 3 has a chamber for accommodating the battery device 2 and includes a wall panel 31 that defines the chamber. The protective section 4 is disposed on the outside of the housing 3 to reduce the difficulty of installation and control. The protective section 4 includes a storage mechanism 41 and a shielding mechanism 42. At least a portion of the shielding mechanism 42 is disposed within the storage mechanism 41 to reduce the size of the protective section 4, reduce the difficulty of storage and transportation of the protective section 4, and reduce the impact of the shielding section on the normal operation of the housing 3. The shielding mechanism 42 is configured to withstand high temperatures. When the value is equal to or greater than the first threshold, the shielding mechanism 42 extends out of the storage mechanism 41 and covers at least part of the wall panel 31. Covering at least part of the wall panel 31 with the shielding mechanism 42 can prevent at least part of the flame inside the box 3 from escaping to the outside, thereby reducing the impact of the burning energy storage device 1 on other energy storage devices 1, enhancing the fire resistance of the energy storage device 1, and / or covering at least part of the wall panel 31 with the shielding mechanism 42 can prevent at least part of the flame outside the box 3 from directly burning the box 3, thereby reducing the damage of the external flame to the energy storage device 1, enhancing the fire resistance of the energy storage device 1, and improving the reliability of the energy storage system.

[0168] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: Battery device; A housing having a chamber in which the battery device is housed, the housing including a wall panel that helps define the chamber; A protective section is disposed on the outside of the housing. The protective section includes a storage mechanism and a shielding mechanism. The storage mechanism is disposed on the wall panel. At least a portion of the shielding mechanism is disposed within the storage mechanism. The shielding mechanism is configured to extend out of the storage mechanism and cover at least a portion of the wall panel when the temperature is greater than or equal to a first threshold.

2. The energy storage device according to claim 1, characterized in that, The protective part further includes a fixing mechanism, which is spaced apart from the storage mechanism. The shielding mechanism is configured to extend out of the storage mechanism and connect to the fixing mechanism when the temperature is greater than or equal to a first threshold.

3. The energy storage device according to claim 1, characterized in that, The wall panel includes a top wall, a bottom wall, and side walls. The top wall and the bottom wall are arranged opposite each other along the direction of gravity, and the side walls are connected between the top wall and the bottom wall. The shielding mechanism is configured to extend out of the storage mechanism and cover at least a portion of the sidewall when the temperature is greater than or equal to a first threshold.

4. The energy storage device according to claim 3, characterized in that, The enclosure also includes functional components connected to the sidewalls and forming the chamber. The shielding mechanism is configured to extend from the storage mechanism and cover at least a portion of the functional components and at least a portion of the sidewalls when the temperature is greater than or equal to a first threshold.

5. The energy storage device according to claim 4, characterized in that, The sidewall includes four wall portions arranged opposite each other along the length direction of the box and opposite each other along the width direction of the box. The four wall portions include at least one first wall portion and at least one second wall portion. The functional component is installed on the first wall portion, and the second wall portion is connected to the first wall portion. The shielding mechanism is configured to extend out of the storage mechanism when the temperature is greater than or equal to a first threshold and cover the first wall portion and at least one second wall portion adjacent to the first wall portion.

6. The energy storage device according to claim 4, characterized in that, The functional component includes a pressure relief mechanism, and the shielding mechanism is configured to extend from the receiving mechanism and cover the pressure relief mechanism when the temperature is greater than or equal to a first threshold, with a gap formed between the sidewall and the shielding mechanism. The storage mechanism is provided with a pressure relief channel, which connects the gap to the external environment. Alternatively, the protective part may also include a fixing mechanism, and at least one of the storage mechanism and the fixing mechanism is provided with a pressure relief channel, which connects the gap to the external environment.

7. The energy storage device according to any one of claims 1-6, characterized in that, The energy storage device includes two stacked boxes, namely a first box and a second box, with the direction from the first box to the second box being the direction of gravity. The storage mechanism is disposed in the first box, and the shielding mechanism is configured to extend out of the storage mechanism when the temperature is greater than or equal to a first threshold, and cover at least a portion of the wall panels of the first box and at least a portion of the wall panels of the second box.

8. The energy storage device according to claim 1, characterized in that, The housing mechanism includes a housing and a stop. The housing includes a receiving cavity for receiving the shielding mechanism, and at least one end of the receiving cavity has an opening. The stop connects the housing and the shielding mechanism to stop the shielding mechanism. The stop is configured to disengage from the shielding mechanism when the temperature is greater than or equal to a first threshold, so that the shielding mechanism extends out of the opening.

9. The energy storage device according to claim 8, characterized in that, The storage mechanism also includes a sensor for acquiring first temperature information. The stop is configured to disengage from the shielding mechanism to release the shielding mechanism when the first temperature information is greater than or equal to a first threshold. And / or, the stop is configured to melt when the temperature is greater than or equal to a first threshold to release the shielding mechanism.

10. The energy storage device according to claim 1, characterized in that, The protective part further includes a fire-retardant coating, which is disposed on at least a portion of the outer surface of the shielding mechanism.

11. An energy storage system, characterized in that, Includes the energy storage device described in any one of claims 1-10.

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