energy storage device

Abstract

The utility model relates to energy storage device technical field and disclose a kind of energy storage device, and energy storage device includes: box, exhaust component, battery module, the box wall of box is equipped with mounting hole;Exhaust component includes pressure relief plate, cover plate, exhaust piece and lifting mechanism, pressure relief plate is sealingly installed in mounting hole, pressure relief plate is equipped with pressure release, cover plate is closed in pressure release, and be configured as when the pressure in box reaches target threshold value, pressure release can be opened, exhaust piece is located in box and is directly opposite pressure release and is equipped on pressure relief plate, lifting mechanism is drivingly connected pressure relief plate, including first connecting rod, second connecting rod, bayonet piece, first connecting rod and second connecting rod are rotatably connected pressure relief plate and box wall, and are slidably equipped in bayonet piece;Battery module is equipped in box.The utility model can make the pressure relief system and ventilation system of energy storage device integrated, guide energy storage device to direct exhaust pressure relief when fire, reduce the probability that adjacent device generates secondary disaster, improve the safety reliability of energy storage device.

Description

Technical Field

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

[0002] Currently, energy storage containers typically employ a separate design for the top pressure relief panel and the bottom / side ventilation system. The pressure relief panel, as a passive pressure relief device, only opens in one direction when the internal pressure reaches a threshold. Air inlet louvers at the bottom and exhaust fans on the sides form a ventilation loop to achieve air exchange. Therefore, the pressure relief and ventilation systems in these energy storage containers only perform a single function. The large amounts of combustible smoke and flames discharged by the pressure relief panel and exhaust fans are directed in different directions, resulting in unpredictable propagation of the smoke and flames. This can easily lead to secondary disasters and affect the safety and reliability of the energy storage container group. Utility Model Content

[0003] This application provides an energy storage device in which the pressure relief system and ventilation system are integrated into one unit. This can guide the combustible smoke and flames generated by thermal runaway in a directional manner, which helps to reduce the risk of secondary disasters and improve the safety and reliability of the energy storage device.

[0004] This application provides an energy storage device, including: a housing, an exhaust assembly, and a battery module. The housing wall has mounting holes located on the top of the housing. The exhaust assembly includes a pressure relief plate, a cover plate, an exhaust component, and a lifting mechanism. The pressure relief plate is sealed and installed in the mounting holes and has a pressure relief port. The cover plate is closed within the pressure relief port and configured to open the pressure relief port when the pressure inside the housing reaches a target threshold. The exhaust component is located on the pressure relief plate, inside the housing, and directly opposite the pressure relief port. The lifting mechanism is driven and connected to the pressure relief plate and configured to drive the pressure relief plate to lift relative to the housing wall. The lifting mechanism is located on opposite sides of the pressure relief plate and includes a first connecting rod, a second connecting rod, and a locking pin. The first connecting rod and the second connecting rod are angled together, with one end rotatably connected to the pressure relief plate and the other end rotatably connected to the housing wall. Both the first connecting rod and the second connecting rod are slidably mounted on the locking pin, which is configured to lock in place when the first connecting rod and the second connecting rod move relative to each other to a target position. The battery module is located inside the housing.

[0005] According to the energy storage device of this application embodiment, by integrating ventilation and pressure relief functions into the exhaust assembly, the combustible smoke and flames generated by thermal runaway can be concentrated and guided to a specific wind direction. This reduces the probability of undirected spread of combustible smoke and flames, decreases the risk of secondary disasters, and improves the reliability of other surrounding energy storage devices. Integrating ventilation and pressure relief functions into the exhaust assembly also reduces the number of components in the energy storage device, decreases its size, and optimizes the arrangement of its various components.

[0006] In some embodiments of this application, the energy storage device includes a pressure detection element configured to control a lifting mechanism to lift a pressure relief plate relative to the tank wall and activate an exhaust fan when the pressure inside the tank reaches a target threshold. In this technical solution, when thermal runaway of the battery module causes the pressure inside the tank to rise and reach a preset target threshold, the pressure detection element can promptly detect this and send an electrical signal to the lifting mechanism. Upon receiving the signal, the lifting mechanism simultaneously controls both the lifting mechanism and the exhaust fan to open the mounting hole and activate the exhaust fan, rapidly relieving pressure. This increases the timeliness of pressure relief and improves the safety and reliability of the energy storage device.

[0007] In some embodiments of this application, the lifting mechanism and the exhaust component are mechanically linked to activate the exhaust component when the lifting mechanism drives the pressure relief plate to rise relative to the tank wall. In the above technical solution, the exhaust component can be activated not only by electrical signal control but also mechanically controlled by the mechanical linkage between the lifting mechanism and the exhaust component. This reduces the risk of the exhaust component failing to open due to electrical control failure, thereby improving the operational reliability of the exhaust component and consequently enhancing the pressure relief and exhaust reliability of the energy storage device.

[0008] In some embodiments of this application, the energy storage device includes a temperature detection element configured to control a lifting mechanism to lift a pressure relief plate relative to the box wall and activate an exhaust fan when the temperature inside the box reaches a target temperature. In the above technical solution, the temperature detection element can be installed inside the box near the battery module or in different areas inside the box to monitor temperature changes inside the box in real time. When the temperature inside the box reaches the target temperature, the temperature detection element quickly sends an electrical signal to the lifting mechanism. Upon receiving the signal, the lifting mechanism simultaneously controls the lifting mechanism and the exhaust fan to fully open the mounting hole and activate the exhaust fan for rapid pressure relief. This increases the timeliness of pressure relief and improves the safety and reliability of the energy storage device.

[0009] In some embodiments of this application, the lifting mechanism includes a drive member that drives one of a first link, a second link, and a locking pin.

[0010] In the above technical solution, the driving component drives the connecting pin, the first link or the second link, thereby actively driving the pressure relief plate to rise, which helps to increase the lifting height of the pressure relief plate, thereby increasing the height difference between the pressure relief plate and the box wall, which helps to accelerate the gas discharge and improve the exhaust pressure relief efficiency.

[0011] In some embodiments of this application, the exhaust component includes a rotating bracket and an exhaust fan. The rotating bracket is adjustablely mounted on a pressure relief plate, and the exhaust fan is mounted on the rotating bracket, with its fan axis perpendicular to the rotation axis of the rotating bracket. In the above technical solution, the adjustable angle of the rotating bracket on the pressure relief plate allows for flexible adjustment of the exhaust fan's angle relative to the tank wall, adjusting the direction of flue gas and flame exhaust towards the energy storage device. This reduces the probability of flue gas and flame contacting other adjacent devices, thereby reducing the probability of secondary disasters caused by other adjacent devices and improving the safety and reliability of the energy storage device.

[0012] In some embodiments of this application, the energy storage device includes a pressure detection element used to detect the pressure value inside the chamber. When the cover is opened to release pressure through the pressure relief port, the exhaust fan has three speed settings—a first stage, a second stage, and a third stage—that progressively increase the pressure relief amount, based on the pressure relief process being divided into a first stage, a second stage, and a third stage. The exhaust fan operates at the first speed setting in the first stage, the second speed setting in the second stage, and the third speed setting in the third stage. In this technical solution, the exhaust fan operating at the first speed setting in the first stage helps to discharge some flue gas without excessively consuming energy due to excessively high speed. Operating at the second speed setting in the second stage enhances the ventilation force and accelerates the discharge efficiency of the flue gas. Operating at the third speed setting in the third stage avoids the risk of residual flue gas and heat, thus improving the pressure relief effect and efficiency while reducing energy consumption.

[0013] In some embodiments of this application, a drainage groove is provided at each edge of the pressure relief plate. The drainage groove extends along the corresponding edge line and penetrates the pressure relief plate, and the drainage grooves at any two adjacent edge positions intersect. In the above technical solution, the drainage groove at each edge of the pressure relief plate can be used to drain rainwater and condensate in a timely manner, avoiding the risk of rainwater accumulation affecting the normal operation of the exhaust components, and also avoiding the risk of material corrosion, thereby improving the reliability of the energy storage device.

[0014] 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

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural schematic diagram of an energy storage device provided in some embodiments of this application;

[0017] Figure 2 Top view of an exhaust assembly provided in some embodiments of this application;

[0018] Figure 3 Schematic diagram of the three-dimensional structure of the exhaust assembly provided in some embodiments of this application Figure 1 ;

[0019] Figure 4 The state in which the exhaust assembly in the energy storage device provided in some embodiments of this application is in operation. Figure 1 ;

[0020] Figure 5 The state in which the exhaust assembly in the energy storage device provided in some embodiments of this application is in operation. Figure 2 ;

[0021] Figure 6 Schematic diagram of the three-dimensional structure of the exhaust assembly provided in some embodiments of this application Figure 2 ;

[0022] Figure 7 Schematic diagram of the three-dimensional structure of the exhaust assembly provided in some embodiments of this application Figure 3 ;

[0023] Figure 8 for Figure 7 A magnified view of part I;

[0024] Figure 9 The state in which the exhaust assembly in the energy storage device provided in some embodiments of this application is in operation. Figure 3 .

[0025] icon:

[0026] 100. Energy storage devices;

[0027] 10. Enclosure; 10a. Mounting holes; 11. Enclosure wall;

[0028] 20. Exhaust assembly; 21. Pressure relief plate; 21a. Pressure relief port; 21b. Drainage channel; 22. Cover plate; 23. Ventilation component; 231. Rotating bracket; 232. Exhaust fan; 24. Lifting mechanism; 241. First connecting rod; 242. Second connecting rod; 243. Locking pin; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] In this application, "multiple" means two or more (including two).

[0036] As an example, the battery module of this application consists of multiple battery cells arranged and fixed to form an independent module. As an example, the battery module can also be formed by bundling multiple battery cells together with cable ties. An energy storage device refers to a device that internally houses multiple battery modules for providing energy. An energy storage device group refers to a component composed of multiple energy storage devices.

[0037] A single battery cell includes a casing, electrode assembly, and electrolyte. The casing houses the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode plates. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, while the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the negative current collector without the negative active material layer protrudes from the one with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0038] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0039] Currently, energy storage containers typically employ a separate design for the top pressure relief panel and the bottom / side ventilation system. The pressure relief panel, as a passive pressure relief device, only opens in one direction when the internal pressure reaches a threshold. Air inlet louvers at the bottom and exhaust fans on the sides form a ventilation loop to achieve air exchange. Therefore, the pressure relief and ventilation systems in these energy storage containers only perform a single function. The large amounts of combustible smoke and flames discharged by the pressure relief panel and exhaust fans are directed in different directions, resulting in unpredictable propagation of the smoke and flames. This can easily lead to secondary disasters and affect the safety and reliability of the energy storage container group.

[0040] Based on the above considerations, in order to address the problem that the depressurization and exhaust directions of the pressure relief system and ventilation system of energy storage containers are inconsistent, which can easily cause secondary disasters when combustible smoke and flames are discharged from the energy storage containers, the applicant has designed an energy storage device, including a container body, an exhaust assembly, and a battery module. The container body has mounting holes on its walls, with the mounting holes located at the top of the container body. The exhaust assembly includes a pressure relief plate, a cover plate, an exhaust component, and a lifting mechanism. The pressure relief plate is sealed and installed in the mounting holes, and the pressure relief plate has a pressure relief port. The cover plate is closed within the pressure relief port and is configured to release pressure when the pressure inside the container reaches a target threshold. The pressure relief port is opened, and the exhaust fan is located on the pressure relief plate, inside the housing and directly opposite the pressure relief port. The lifting mechanism is connected to the pressure relief plate and is configured to lift the pressure relief plate relative to the housing wall. The lifting mechanism is located on opposite sides of the pressure relief plate and includes a first link, a second link, and a locking pin. The first link and the second link are set at an angle, with one end rotatably connected to the pressure relief plate and the other end rotatably connected to the housing wall. Both the first link and the second link are slidably mounted on the locking pin, which is configured to lock in place when the first link and the second link move relative to each other to the target position. The battery module is located inside the housing.

[0041] In this type of energy storage device, by integrating ventilation and pressure relief functions into the exhaust assembly, flammable gases and flames generated by thermal runaway can be directed to a specific wind direction. This reduces the likelihood of uncontrolled spread of flammable gases and flames, decreases the risk of secondary disasters, and improves the reliability of surrounding energy storage devices. Integrating ventilation and pressure relief functions into the exhaust assembly also reduces the number of components and the size of the energy storage device, allowing for optimized arrangement of its various parts.

[0042] The energy storage device disclosed in this application can be used, but is not limited to, in factories, shopping malls, office buildings, data centers, new energy power plants, and other devices that require a stable power supply.

[0043] Reference Figures 1 to 8This application provides an energy storage device 100, including: a housing 10, an exhaust assembly 20, and a battery module. The housing 10 has mounting holes 10a on its top wall 11. The exhaust assembly 20 includes a pressure relief plate 21, a cover plate 22, an exhaust component 23, and a lifting mechanism 24. The pressure relief plate 21 is sealed and installed in the mounting hole 10a and has a pressure relief port 21a. The cover plate 22 is closed in the pressure relief port 21a and is configured to open the pressure relief port 21a when the pressure inside the housing 10 reaches a target threshold. The exhaust component 23 is located on the pressure relief plate 21, inside the housing 10, and directly opposite the pressure relief port 21a. The lifting mechanism 24 is connected to the pressure relief plate 21 and is configured to lift the pressure relief plate 21 relative to the box wall 11. The lifting mechanism 24 is located on opposite sides of the pressure relief plate 21 and includes a first connecting rod 241, a second connecting rod 242, and a locking pin 243. The first connecting rod 241 and the second connecting rod 242 are arranged at an angle, with one end rotatably connected to the pressure relief plate 21 and the other end rotatably connected to the box wall 11. The first connecting rod 241 and the second connecting rod 242 are both slidably mounted on the locking pin 243. The locking pin 243 is configured to lock in place when the first connecting rod 241 and the second connecting rod 242 move relative to each other to the target position. The battery module is located inside the box 10.

[0044] The enclosure 10 refers to a structure used to house and protect the battery module and other internal components of the energy storage device 100. The shape of the enclosure 10 can be, but is not limited to, a cuboid, a cube, a cylinder, etc., and the material can be, but is not limited to, metal, plastic, composite materials, etc. The enclosure 10 is typically a sealed structure to prevent external dust, moisture, or other contaminants from entering. The enclosure wall 11 of the enclosure 10 is provided with mounting holes 10a, which can be located on the left, right, top, front, and rear sides of the enclosure 10. The shape of the mounting holes 10a can be, but is not limited to, circular, polygonal, and irregular shapes, etc. For example, refer to... Figure 1 The mounting hole 10a is located on the upper side of the housing 10, and the shape of the mounting hole 10a can be square.

[0045] Typically, no other devices are arranged above the energy storage device 100, or there are very few other devices arranged above it. By providing the mounting hole 10a at the top of the housing 10, when the energy storage device 100 is depressurized, the mounting hole 10a can guide the flue gas and flame to be discharged from the top of the housing 10, reducing the probability of combustible flue gas and flame coming into contact with other adjacent energy storage devices 100. For example, multiple energy storage devices 100 are usually arranged side by side to form an energy storage device group. With the above scheme, when the energy storage device 100 experiences thermal runaway, the combustible flue gas and flame are discharged upwards, which can reduce the impact on other surrounding energy storage devices 100, reduce the probability of secondary disasters occurring in other adjacent devices, improve the reliability of the energy storage device 100, and reduce subsequent maintenance costs. At the same time, guiding the high-temperature flue gas and flame to be discharged upwards can accelerate the flue gas discharge rate and reduce the probability of flue gas remaining inside the housing 10.

[0046] The exhaust assembly 20 refers to a component used to release internal pressure and allow air circulation within the energy storage device 100, ensuring the safety and stability of the internal environment of the housing 10. In the above technical solution, the exhaust assembly 20 includes a pressure relief plate 21, a cover plate 22, and an exhaust component 23. The pressure relief plate 21 has a pressure relief port 21a, and the cover plate 22 is closed within the pressure relief port 21a. The cover plate 22 is configured to open the pressure relief port 21a when the pressure inside the housing 10 reaches a target threshold, thereby allowing timely pressure relief inside the housing 10 to reduce the risk of the housing 10 bursting. A sealing strip may be provided between the pressure relief plate 21 and the mounting hole 10a assembly to improve the sealing performance of the housing 10. The exhaust component 23 refers to a component capable of exhausting air, such as a fan. Simultaneously with the opening of the pressure relief port 21a to release pressure, the exhaust component 23 can also be activated to accelerate the discharge of combustible smoke or flames from the housing 10.

[0047] refer to Figures 4 to 7 The lifting mechanism 24 can be, but is not limited to, a linkage mechanism, an electric push rod, a cylinder, or a hydraulic cylinder, etc., used to lift the pressure relief plate 21 relative to the box wall 11. Optionally, the lifting mechanism 24 is configured to drive the pressure relief plate 21 to lift slowly relative to the box wall 11, or to drive the pressure relief plate 21 to lift rapidly relative to the box wall 11. The lifting mechanism 24 driving the pressure relief plate 21 relative to the box wall 11 opens the mounting hole 10a, providing more channels for the discharge of combustible smoke and flames, facilitating the rapid discharge of smoke and flames, reducing the risk of subsequent fire spread, and improving the efficiency of pressure relief. (Reference) Figure 7 and Figure 8The first link 241 and the second link 242 can rotate around their connection point with the tank wall 11, causing the pressure relief plate 21 to rise. When the first link 241 and the second link 242 move relative to each other to the target position, the locking pin 243 can form a locking engagement with the first link 241 and the second link 242 to stabilize the current state of the pressure relief plate 21, reduce the probability that the pressure relief plate 21 will close or block the mounting hole 10a during operation, and improve the reliability of the pressure relief plate 21. At the same time, the lifting mechanism 24 composed of the first link 241, the second link 242, and the locking pin 243 has a simple structure, which can improve the durability of the lifting mechanism 24 and further improve the reliability of the energy storage device 100. In the above technical solution, the bottom of the housing 10 can be provided with an air inlet. The air inlet, pressure relief port 21a, exhaust component 23, and other components work together to serve as the ventilation system of the energy storage device 100, enabling air circulation within the housing 10 and reducing the temperature generated by the energy storage device 100 during operation. The pressure relief plate 21 and other components serve as the pressure relief system of the energy storage device 100. When the battery module catches fire, it can release the combustible smoke and flames inside the housing 10. Simultaneously, the exhaust component 23, located on the pressure relief plate 21, can quickly expel the smoke and flames inside the housing 10, improving the efficiency of the pressure relief system. When the pressure relief rate decreases and no new pressure accumulates for 30 seconds, the control unit instructs the exhaust system to stop operating.

[0048] Understandably, since the exhaust assembly 20 integrates pressure relief and venting functions, the combustible smoke and flames discharged are all directed in the same direction while achieving pressure relief and venting. This reduces the risk of secondary disasters caused by the undirected discharge of combustible smoke and flames, and guides the combustible smoke and flames away from surrounding electrical components or other energy storage devices that have not experienced thermal runaway. Secondly, the integrated pressure relief and venting functions of the exhaust assembly 20 also reduce the number of components, which is beneficial for reducing the volume of the outer casing 10 and for facilitating the side-by-side arrangement of multiple energy storage devices 100.

[0049] According to the embodiments of this application, the energy storage device 100 integrates ventilation and pressure relief functions into the exhaust assembly 20, which can concentrate and guide the combustible smoke and flames generated by thermal runaway to a specific wind direction. This reduces the probability of the combustible smoke and flames spreading unpredictably, decreases the risk of secondary disasters, and improves the safety and reliability of other surrounding energy storage devices. Integrating ventilation and pressure relief functions into the exhaust assembly 20 also reduces the number of components in the energy storage device 100, decreases its size, and optimizes the arrangement of its components.

[0050] In some embodiments of this application, the energy storage device 100 includes a pressure detection element configured to control a lifting mechanism 24 to lift a pressure relief plate 21 relative to the tank wall 11 and activate an exhaust fan 23 when the pressure inside the housing 10 is detected to reach a target threshold. Exemplarily, the pressure detection element can be, but is not limited to, a strain gauge pressure sensor, a piezoresistive pressure sensor, a capacitive pressure sensor, etc. The pressure detection element can be embedded in the top inner side of the housing 10.

[0051] The lifting mechanism 24 and the exhaust component 23 can work together through, but are not limited to, mechanical linkage, electrical signal control, or program control. For example, the target threshold of the pressure detection component can be 120 kPa. When the pressure reaches 120 kPa, the control unit of the energy storage device 100 can send a signal to open the cover 22, slowly raise the pressure relief plate 21, and activate the exhaust component 23 to exhaust air. The control unit mentioned here can be a controller or a control host, etc.

[0052] In the above technical solution, when the battery module experiences thermal runaway, causing the pressure inside the housing 10 to rise and reach the preset target threshold, the pressure detection device can detect it in time and send an electrical signal to the lifting mechanism 24. After receiving the signal, the lifting mechanism 24 simultaneously controls the lifting mechanism 24 and the exhaust device 23 to work, thereby opening the mounting hole 10a and controlling the exhaust device 23 to start, quickly performing pressure relief work, which can increase the timeliness of pressure relief and exhaust, and improve the safety and reliability of the energy storage device 100.

[0053] In some embodiments of this application, the number of pressure detection elements is at least three. For example, the number of pressure detection elements can be, but is not limited to, three, four, five, six, seven, eight, etc. In the above technical solution, the number of pressure detection elements is at least three, which can reduce the risk of misjudgment caused by local pressure changes and improve the reliability of the energy storage device 100.

[0054] In some embodiments of this application, reference is made to Figures 4 to 7 The lifting mechanism 24 and the exhaust component 23 are mechanically linked to open the exhaust component 23 when the lifting mechanism 24 drives the pressure relief plate 21 to lift relative to the box wall 11.

[0055] Understandably, when the control circuit or system of the control unit fails, the mechanical linkage mechanism automatically takes over to ensure that the exhaust component 23 can still respond after the pressure relief occurs.

[0056] In the above technical solution, the exhaust component 23 can not only be started by electrical signal control, but also mechanically controlled to open by the mechanical linkage between the lifting mechanism 24 and the exhaust component 23. This reduces the risk that the exhaust component 23 cannot be opened due to electrical control failure, thereby improving the working reliability of the exhaust component 23 and thus improving the depressurization and exhaust reliability of the energy storage device 100.

[0057] In some embodiments of this application, the energy storage device 100 includes a temperature detection element configured to control the lifting mechanism 24 to lift the pressure relief plate 21 relative to the box wall 11 and activate the exhaust fan 23 when the temperature inside the box 10 is detected to have reached a target temperature. The temperature detection element may be, but is not limited to, a thermocouple sensor, a resistance temperature detector (RTD) sensor, an infrared temperature sensor, etc.

[0058] In the above technical solution, the temperature detection device can be installed inside the housing 10 near the battery module or in different areas inside the housing 10 to monitor the temperature change inside the housing 10 in real time. When the temperature inside the housing 10 reaches the target temperature, the temperature detection device will quickly send an electrical signal to the lifting mechanism 24. After receiving the signal, the lifting mechanism 24 will simultaneously control the lifting mechanism 24 and the exhaust device 23 to work, fully open the mounting hole 10a, and control the exhaust device 23 to start, quickly perform pressure relief work, which can increase the timeliness of pressure relief and exhaust, and improve the reliability of the energy storage device 100.

[0059] In some embodiments of this application, reference is made to Figure 7 and Figure 8 The lifting mechanism 24 includes a driving component, which drives one of the first connecting rod 241, the second connecting rod 242, and the locking pin 243.

[0060] The driving component can be a motor, a cylinder, or a hydraulic cylinder, etc. For example, the driving component can provide linear motion, thereby driving one of the first connecting rod 241, the second connecting rod 242, and the locking pin 243 to move along the third direction Z, thus causing the pressure relief plate 21 to rise relative to the box wall 11. For example, if the driving component is a cylinder, the extension rod of the cylinder is connected to the locking pin 243. By driving the locking pin 243 to move along the third direction Z, the first connecting rod 241 and the second connecting rod 242 can move up and down along the third direction Z in sliding engagement with the locking pin 243. As another example, if the driving component is a cylinder, one end of the cylinder is rotatably connected to the box wall 11, and the other end is rotatably connected to the first connecting rod 241 or the second connecting rod 242, and is set at an angle, the swinging motion of the first connecting rod 241 or the second connecting rod 242 can also drive the pressure relief plate 21 to rise relative to the box wall 11. For example, the driving component may also include an electric unlocking component and a spring. One end of the spring is connected to the box wall 11, and the other end is connected to the locking pin 243. When the pressure relief plate 21 closes the mounting hole 10a, it is in a compressed state. When the electric unlocking component releases the spring, the spring can drive the pressure relief plate 21 to quickly eject and rise relative to the box wall 11 under its own elasticity.

[0061] In the above technical solution, the driving component drives the connecting pin 243, the first connecting rod 241 or the second connecting rod 242, thereby actively driving the pressure relief plate 21 to rise, which is beneficial to increase the lifting height of the pressure relief plate 21, thereby increasing the height difference between the pressure relief plate 21 and the box wall 11, which is beneficial to accelerate gas discharge and improve exhaust pressure relief efficiency.

[0062] In some embodiments of this application, reference is made to Figure 9 The exhaust component 23 includes a rotating bracket 231 and an exhaust fan 232. The rotating bracket 231 is adjustablely mounted on the pressure relief plate 21, and the exhaust fan 232 is mounted on the rotating bracket 231, with the fan axis of the exhaust fan 232 perpendicular to the rotation axis of the rotating bracket 231.

[0063] The exhaust fan 232 can be driven by a variable frequency motor. The rotating bracket 231 can refer to a bracket with electric drive function. The rotating shaft of the rotating bracket 231 is rotatably connected to the pressure relief plate 21, and the rotation angle is controlled by a motor or servo motor.

[0064] In the above technical solution, the rotating bracket 231 is adjustable on the pressure relief plate 21, which can flexibly adjust the angle of the exhaust fan 232 relative to the box wall 11, adjust the direction of the flue gas and flame discharged above the energy storage device 100, reduce the probability of the flue gas and flame contacting other adjacent devices, thereby reducing the probability of secondary disasters caused by other adjacent devices and improving the safety and reliability of the energy storage device 100.

[0065] In some embodiments of this application, the energy storage device 100 includes a pressure detection element for detecting the pressure value inside the housing 10. When the cover 22 opens the pressure relief port 21a to release pressure, the exhaust fan 232 has a first gear, a second gear, and a third gear with sequentially decreasing speed, according to dividing the pressure relief process into a first stage, a second stage, and a third stage with increasing pressure relief. The exhaust fan 232 operates at the first gear in the first stage, at the second gear in the second stage, and at the third gear in the third stage.

[0066] For example, the first stage can refer to a pressure relief of less than or equal to 30% inside the enclosure 10, the second stage can refer to a pressure relief of 30% to 70% inside the enclosure 10, and the third stage can refer to a pressure relief of greater than or equal to 70% inside the enclosure 10. The speed of the first gear can be 50% of the maximum speed of the exhaust fan 232, the speed of the second gear can be 80% of the maximum speed of the exhaust fan 232, and the speed of the third gear can be the maximum speed of the exhaust fan 232.

[0067] In the above technical solution, the exhaust fan 232 operates at the first gear in the first stage, which can help exhaust some of the flue gas without consuming too much energy due to excessive speed. In the second stage, it operates at the second gear to enhance the exhaust force and accelerate the exhaust efficiency of the flue gas. In the third stage, it operates at the third gear to avoid the risk of residual flue gas and heat, thereby improving the pressure relief effect and efficiency while helping to reduce energy consumption.

[0068] In some embodiments of this application, reference is made to Figures 1 to 9 Each edge of the pressure relief plate 21 is provided with a drainage groove 21b, which extends along the corresponding edge line and penetrates the pressure relief plate 21. The drainage grooves 21b at any two adjacent edge positions intersect. Optionally, the bottom slope of the drainage groove 21b is greater than or equal to 3°, and the width of the drainage groove 21b is 3cm to 5cm.

[0069] In the above technical solution, each edge of the pressure relief plate 21 is provided with a drainage groove 21b, which can be used to drain rainwater and condensate in a timely manner, avoiding the risk of rainwater accumulation affecting the normal operation of the exhaust component 20, and also avoiding the risk of material corrosion, thereby improving the reliability of the energy storage device 100.

[0070] The following describes two specific embodiments of the energy storage device 100 of this application.

[0071] Example 1

[0072] Reference Figures 1 to 7 The energy storage device 100 of this application embodiment includes: a housing 10, an exhaust assembly 20, a battery module, and a pressure detection device.

[0073] The top of the housing 10 is provided with mounting holes 10a.

[0074] The exhaust assembly 20 includes a pressure relief plate 21, a cover plate 22, an exhaust fan 23, and a lifting mechanism 24. The pressure relief plate 21 is sealed and installed in the mounting hole 10a, and the pressure relief plate 21 has a pressure relief port 21a. The cover plate 22 closes the pressure relief port 21a and is configured to open the pressure relief port 21a when the pressure inside the housing 10 reaches a target threshold. The exhaust fan 23 includes a rotating bracket 231 and an exhaust fan 232. The rotating bracket 231 is adjustablely mounted on the pressure relief plate 21, and the exhaust fan 232 is mounted on the rotating bracket 231, with the fan axis of the exhaust fan 232 perpendicular to the rotation axis of the rotating bracket 231.

[0075] The lifting mechanism 24 includes a first connecting rod 241, a second connecting rod 242, a locking pin 243, and a driving member. The first connecting rod 241 and the second connecting rod 242 are arranged at an included angle, with one end rotatably connected to the pressure relief plate 21 and the other end rotatably connected to the box wall 11. Both the first connecting rod 241 and the second connecting rod 242 are slidably mounted on the locking pin 243. The locking pin 243 is configured to lock into place when the first connecting rod 241 and the second connecting rod 242 move relative to each other to a target position. The driving member drives one of the first connecting rod 241, the second connecting rod 242, and the locking pin 243. The lifting mechanism 24 and the exhaust fan 23 are mechanically linked so that the exhaust fan 23 is activated when the lifting mechanism 24 drives the pressure relief plate 21 to lift relative to the box wall 11.

[0076] The battery module is located inside the housing 10. The pressure detection component is a pressure sensor.

[0077] In the above embodiment, the pressure relief plate 21 is fixed to the top of the housing 10 with bolts, and sealing strips are provided around its edges to ensure airtightness. A drainage channel is provided around the pressure relief plate 21 to drain condensate and rainwater. The exhaust fan 23 is a motor-driven exhaust fan 232. The motor of the exhaust fan 23 is mechanically connected to the lifting mechanism 24, ensuring that the exhaust fan 232 responds immediately after the pressure relief plate 21 deforms. The exhaust fan 232 has an adjustable angle structure, and the airflow direction can be adjusted by the control unit to allow high-temperature flue gas to be discharged upwards. A pressure sensor collects real-time pressure changes inside the housing. When the pressure reaches 120 kPa, the control unit sends a signal to open the cover, slowly raise the pressure relief plate 21, and start the fan for exhaust. In the event of a control system failure, the mechanical linkage mechanism automatically takes over, ensuring that the exhaust fan continues to respond after pressure relief occurs.

[0078] Example 2

[0079] The structure of the energy storage device 100 in Embodiment 2 of this application is generally the same as that of the energy storage device 100 in Embodiment 1. The difference is that the energy storage device 100 in this embodiment also includes a temperature detection element, which is a temperature sensor. The pressure detection element can detect the pressure value inside the housing 10. When the cover plate 22 opens the pressure relief port 21a to release pressure, according to dividing the pressure relief process into a first stage, a second stage, and a third stage with increasing pressure relief, the exhaust fan 232 has a first gear, a second gear, and a third gear with decreasing speed in sequence. The exhaust fan 232 operates at the first gear in the first stage, the second gear in the second stage, and the third gear in the third stage.

[0080] In the above embodiment, the exhaust fan 232 is driven by a variable frequency motor. The control unit dynamically adjusts the exhaust fan speed according to the pressure relief amount. In the first stage (pressure relief ≤ 30%), the exhaust fan 232 performs low-speed exhaust (50% speed) in the first gear; in the second stage (pressure relief 30%-70%), the exhaust fan 232 performs medium-speed exhaust (80% speed) in the second gear to accelerate the exhaust of flue gas; in the third stage (pressure relief ≥ 70%), the exhaust fan 232 performs high-speed exhaust (100% speed) in the third gear. The control unit can also have built-in redundant circuitry. When the main control fails, the exhaust fan can still be triggered by a mechanical switch after the cover 22 bursts open on the pressure relief plate 21.

[0081] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The above are merely preferred embodiments of this application and are not intended to limit the application. For those skilled in the art, unless otherwise specified, all implementation methods and optional implementation methods of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An energy storage device, characterized in that, include: The box body has mounting holes on its walls, and the mounting holes are located on the top of the box body; An exhaust assembly includes a pressure relief plate, a cover plate, an exhaust component, and a lifting mechanism. The pressure relief plate is sealed and installed in the mounting hole and has a pressure relief port. The cover plate is closed in the pressure relief port and configured to open the pressure relief port when the pressure inside the chamber reaches a target threshold. The exhaust component is located on the pressure relief plate, inside the chamber, and directly opposite the pressure relief port. The lifting mechanism is driven and connected to the pressure relief plate and configured to drive the pressure relief plate to lift relative to the chamber wall. The lifting mechanism is located on opposite sides of the pressure relief plate and includes a first connecting rod, a second connecting rod, and a locking pin. The first connecting rod and the second connecting rod are arranged at an angle, with one end rotatably connected to the pressure relief plate and the other end rotatably connected to the chamber wall. Both the first connecting rod and the second connecting rod are slidably disposed on the locking pin, which is configured to lock in engagement when the first connecting rod and the second connecting rod move relative to each other to a target position. A battery module, wherein the battery module is disposed within the housing.

2. The energy storage device according to claim 1, characterized in that, The energy storage device includes a pressure detection element configured to control the lifting mechanism to lift the pressure relief plate relative to the box wall and activate the exhaust fan when the pressure inside the box reaches the target threshold.

3. The energy storage device according to claim 1 or 2, characterized in that, The lifting mechanism and the exhaust component are mechanically linked to activate the exhaust component when the lifting mechanism drives the pressure relief plate to lift relative to the box wall.

4. The energy storage device according to claim 1 or 2, characterized in that, The energy storage device includes a temperature detection element, which is configured to control the lifting mechanism to lift the pressure relief plate relative to the box wall and activate the exhaust fan when the temperature inside the box is detected to have reached a target temperature.

5. The energy storage device according to claim 1, characterized in that, The lifting mechanism includes a driving component that drives one of the first connecting rod, the second connecting rod, and the locking pin.

6. The energy storage device according to claim 1, characterized in that, The exhaust component includes a rotating bracket and an exhaust fan. The rotating bracket is adjustablely mounted on the pressure relief plate, and the exhaust fan is mounted on the rotating bracket, with the fan axis of the exhaust fan perpendicular to the rotation axis of the rotating bracket.

7. The energy storage device according to claim 6, characterized in that, The energy storage device includes a pressure detection element for detecting the pressure value inside the tank. When the cover is opened to release pressure through the pressure relief port, the pressure relief process is divided into a first stage, a second stage, and a third stage with increasing pressure relief. The exhaust fan has a first gear, a second gear, and a third gear with sequentially decreasing speed. The exhaust fan operates at the first gear in the first stage, at the second gear in the second stage, and at the third gear in the third stage.

8. The energy storage device according to any one of claims 1, 2, and 5, characterized in that, The pressure relief plate is provided with a drainage groove at each edge position. The drainage groove extends along the corresponding edge line and penetrates the pressure relief plate. The drainage grooves at any two adjacent edge positions intersect.

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