Energy storage device with explosion venting function and energy storage system

Abstract

An energy storage device (1) with an explosion venting function and an energy storage system (1000), the energy storage device (1) comprising a housing (20), an explosion venting plate (31), an insertion member (32), and a transmission assembly (33), wherein the housing (20) is provided with an insertion hole (102); the insertion member (32) is inserted into the insertion hole (102) thus fixing the explosion venting plate (31) to the housing (20); one end of the transmission assembly (33) is connected to the explosion venting plate (31), and the other end of the transmission assembly (33) is connected to the insertion member (32); and in the direction of insertion of the insertion member (32), the joint of the other end of the transmission assembly (33) and the insertion member (32) is located between the insertion hole (102) and the joint of one end of the transmission assembly (33) and the explosion venting plate (31). While overcoming defects such as assembly errors, part machining errors, and metal fatigue vibration, the energy storage device (1) has the advantages of easy machining and assembly, and reliability. On the basis of an explosion venting pressure, the deformation of the explosion venting plate (31) is calculated, and on the basis of the calculated amount of the deformation of the explosion venting plate (31), the length to which the insertion member (32) is inserted into the insertion hole (102) is then calculated. The explosion venting actuation pressure can be controlled simply by changing the length to which the insertion member (32) is inserted into the insertion hole (102), thereby adapting to scenarios with different explosion venting pressures.

Description

Energy storage device and energy storage system with explosion relief function

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 21, 2023, with application number 202323157290.4 and application name “Energy storage device and energy storage system with explosion relief function”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of energy storage equipment, and in particular to an energy storage device and an energy storage system with explosion relief function. Background Art

[0003] Energy storage devices offer high flexibility, reliability, and energy density, and are being increasingly used in large-scale photovoltaic and wind power generation to address intermittent power generation fluctuations. However, the battery modules in these devices carry the risk of combustion and explosion, posing significant risks to their safe use.

[0004] The explosion venting structure in the related art includes an explosion venting plate, explosion venting bolts and explosion venting gaskets. The explosion venting plate is fixed to the shell through the explosion venting bolts and explosion venting gaskets. However, the explosion venting gasket has low strength, is prone to metal fatigue and is irreversible, and is easy to cause the starting pressure of the explosion venting plate to change, resulting in poor explosion venting stability.

[0005] Application Contents

[0006] The embodiments of the present application provide an energy storage device and an energy storage system with an explosion relief function to solve the problem that the starting pressure of the explosion relief plate of the energy storage device is easily changed, thereby improving the explosion relief stability of the energy storage device.

[0007] In a first aspect, an embodiment of the present application provides an energy storage device, comprising a shell, a battery module, an explosion venting plate, a connector, and a conductive component, wherein the shell comprises a plurality of surrounding walls, the plurality of surrounding walls enclosing a receiving space, the surrounding walls being provided with an explosion venting port communicating with the receiving space, the shell being provided with a plug-in hole, the extension direction of the plug-in hole being arranged at an acute angle to the surrounding wall provided with the explosion venting port; the battery module being located in the receiving space; the explosion venting plate being located on the surrounding wall provided with the explosion venting port and being used to cover the explosion venting port; the connector being slidably inserted into the plug-in hole along the extension direction of the plug-in hole In the hole, in the direction perpendicular to the surrounding wall with the explosion vent, part of the shell is located between the plug-in component and the explosion vent plate; one end of the conductive component is connected to the explosion vent plate, and the other end of the conductive component is connected to the plug-in component, and one end and the other end of the conductive component are two opposite ends in the extension direction of the conductive component; in the extension direction of the plug hole, the other end of the conductive component is located between one end of the conductive component and the plug hole, and when the explosion vent plate is displaced relative to the shell by more than a value, the conductive component drives the plug-in component to move out of the plug hole.

[0008] In this embodiment, since the plug-in connector is slidably inserted into the plug-in connector along the extension direction of the plug-in connector, a portion of the housing is located between the plug-in connector and the explosion venting plate in a direction perpendicular to the surrounding wall provided with the explosion venting opening. Thus, the housing and the explosion venting plate can be fixed together by the plug-in connector through the engagement between the portion of the housing located between the plug-in connector and the explosion venting plate and the plug-in connector. Compared to the scheme of fixing the explosion venting plate using explosion venting bolts and explosion venting gaskets, the activation pressure of the explosion venting plate depends on the strength of the explosion venting gasket. When the explosion venting gasket is bent or broken, the explosion venting of the explosion venting plate is achieved. This scheme mainly limits the relative fixation of the explosion venting plate and the housing through the support of the explosion venting gasket. However, the strength of the explosion venting gasket should not be set too high. When subjected to an external force (less than the activation pressure), metal fatigue is likely to occur, which will easily lead to a reduction in the strength of the explosion venting gasket, resulting in a reduction in the activation pressure of the explosion venting plate, and thus the explosion venting plate cannot be properly vented. In this embodiment, however, the connector is mated with the housing, eliminating the need for an explosion-venting gasket. Given sufficient connector strength, even when subjected to significant torque, the connector will not break, thereby ensuring the strength of the connection between the explosion-venting plate and the housing. Because explosion venting in this embodiment is achieved without the connector breaking or bending, the connector can be sufficiently strong to prevent metal fatigue from multiple external forces (less than the activation pressure) affecting the connector's strength and, consequently, the activation pressure of the explosion-venting plate, thereby enhancing the explosion-venting stability of the energy storage device.

[0009] Furthermore, because this embodiment achieves explosion relief by pulling the connector out of the socket, rather than breaking or bending the connector, the connector can be reused, saving costs. Furthermore, since there is no need to control the connector's strength to a certain value, the design difficulty of the connector is greatly reduced.

[0010] In addition, in the extension direction of the plug hole, the other end of the conductive component connected to the plug connector is located between the end of the conductive component connected to the explosion venting plate and the plug hole, so that the explosion venting plate is displaced under the action of pressure, and the air pressure in the accommodating space drives the explosion venting plate to be displaced, thereby pulling the conductive component to move, and then the plug connector tension can be applied through the conductive component. Since the other end of the conductive component connected to the plug connector is located between the end of the conductive component connected to the explosion venting plate and the plug hole, the tension brought by the deformation of the explosion venting plate into the conductive component has a component force applied to the plug connector in the extension direction of the plug hole, and the component force is in the direction of pulling out the plug connector, so that the plug connector can be pulled out of the plug hole. When the plug connector is pulled out, the explosion venting plate can be detached from the shell to achieve explosion relief.

[0011] In some embodiments, the angle formed between the extension direction of the plug hole and the surrounding wall provided with the explosion vent is in the range of 0°-45°. In this embodiment, within this range, the connector and the plug hole can be more stably matched, and the connector is not easily removed from the plug hole, thereby improving the stability of the attachment of the explosion vent plate to the housing.

[0012] In some embodiments, the energy storage device further includes a first connection portion connected to the explosion venting plate, the first connection portion being provided with an assembly hole, the assembly hole and the plug-in hole being arranged along the extension direction of the plug-in hole, and the connector being inserted into the assembly hole and the plug-in hole. In this embodiment, since the connector is inserted into the assembly hole and the plug-in hole, and can be pulled out of the connector through the conductive component, the explosion venting plate is fixed and the explosion venting of the explosion venting plate is achieved through the cooperation between the connector, the assembly hole, and the plug-in hole. Specifically, the position of the connector and the explosion venting plate can be relatively fixed through the cooperation between the assembly hole and the connector, and the position of the connector and the shell can be relatively fixed through the cooperation between the plug-in hole and the connector, thereby achieving relative fixation between the explosion venting plate and the shell.

[0013] In some embodiments, the connector is clearance-fitted with the assembly hole and the plugging hole. Since the connector is clearance-fitted with the assembly hole and the plugging hole, the assembly hole and the plugging hole require low manufacturing precision, are easy to manufacture, and are convenient for production.

[0014] In some embodiments, the housing includes a second connection portion for defining the plug hole, and the first connection portion and the second connection portion are arranged in the direction in which the plug hole extends. In this embodiment, the first connection portion and the second connection portion are arranged in the direction in which the plug hole extends, thereby facilitating the arrangement of the assembly hole and the plug hole along the direction in which the plug hole extends, and facilitating the insertion of connectors into the assembly hole and the plug hole, thereby streamlining the structure of the energy storage device.

[0015] In some embodiments, the housing is provided with a fixing hole, and the energy storage device further includes a first fixing rod connected to the explosion venting plate. The first fixing rod is inserted into the fixing hole, and a portion of the first fixing rod extends out of the fixing hole along the insertion direction of the first fixing rod. The portion of the first fixing rod extending out of the fixing hole is provided with an assembly hole, and the connector is inserted into the assembly hole and the insertion hole. In this embodiment, the first fixing rod is inserted into the fixing hole to restrict relative movement of the explosion venting plate and the housing in a direction parallel to the surrounding wall provided with the explosion venting opening. The assembly hole is provided on the portion of the first fixing rod that extends beyond the fixing hole, and the connector is inserted into the assembly hole and the insertion hole along the extension direction of the insertion hole, thereby restricting movement of the first fixing rod relative to the housing in a direction other than the extension direction of the insertion hole, thereby securing the explosion venting plate to the housing. In addition, the fixing hole can be directly provided on the outer wall of the housing, such as directly on the top wall of the housing, without the need for a structure similar to the second connecting portion described above. This simplifies the housing structure, not only does it not occupy the storage space, but also reduces the difficulty of manufacturing the housing.

[0016] In some embodiments, the extension direction of the plug hole is parallel to the surrounding wall provided with the explosion vent. When the extension direction of the plug hole is parallel to the surrounding wall provided with the explosion vent, the stability of the plug-in component in fixing the explosion vent plate to the housing is the highest.

[0017] In some embodiments, in a direction perpendicular to the surrounding wall provided with the explosion vent, the projection of the end of one end of the conductive component connected to the explosion vent plate is located at the middle position of the explosion vent plate, and the projection of the end of the other end of the conductive component connected to the connector is located at the edge of the explosion vent plate. In this embodiment, since the projection of the end of the other end of the conductive component connected to the connector is located at the edge of the explosion vent plate in a direction perpendicular to the surrounding wall provided with the explosion vent, the explosion vent plate is fixed to the housing at the edge of the explosion vent plate. Therefore, when the energy storage device explodes or burns and explosion venting is required, the deformation of the middle position of the explosion vent plate is greater and more obvious than the deformation of the edge portion of the explosion vent plate. In the direction perpendicular to the surrounding wall provided with the explosion vent, the projection of the end of the conductive component connected to the explosion vent plate is located in the middle position of the explosion vent, so that the middle position where the explosion vent plate is deformed more can drive the conductive component to have a greater displacement in the direction perpendicular to the surrounding wall provided with the explosion vent, thereby enabling the connector to have a greater displacement in the extension direction of the plug hole, so that the connector can be smoothly pulled out of the plug hole when an explosion occurs.

[0018] In some embodiments, the transmission assembly includes a first connecting rod and a steering rod, one end of the first connecting rod being connected to the explosion venting plate, the other end of the first connecting rod being connected to one end of the steering rod, the other end of the steering rod being rotatably connected to the connector, such that the angle between the steering rod and the connector is adjustable, thereby enabling the connector to move relative to the connector along the extension direction of the connector hole, and the other end of the steering rod being connected to the connector is located between the end of the first connecting rod connected to the explosion venting plate and the connector hole. In this embodiment, since the connector moves in the extension direction of the connector hole when it is to be removed, the steering rod functions to convert the direction of the force applied by the explosion venting plate to the first connecting rod via the end of the first connecting rod connected to the explosion venting plate, thereby converting the direction of the force applied by the transmission assembly to the connector via the other end of the steering rod connected to the connector to the extension direction of the connector hole, thereby facilitating the connector to move relative to the connector hole along the extension direction of the connector hole for removal from the connector hole. Specifically, since the steering rod is rotatably connected to the connector, the angle between the steering rod and the connector is adjustable, so that the force applied to the steering rod can be converted into a force in the extension direction of the connector hole and applied to the connector, so that the connector is moved out of the connector hole.

[0019] In some embodiments, the steering rod includes an elongated second connecting rod and a first and second rotating shafts connected to the ends of the second connecting rod. One end of the second connecting rod is rotatably connected to the explosion venting plate via the first rotating shaft, and the other end of the second connecting rod is rotatably connected to the connector via the second rotating shaft. The first connecting rod is connected between the two ends of the second connecting rod. Because one end of the second connecting rod is rotatably connected to the explosion venting plate via the first rotating shaft, the angle of the second connecting rod relative to the explosion venting plate can dynamically change with the deformation of the explosion venting plate, thereby enabling the second connecting rod to rotate about the central axis of the second rotating shaft. Because the second end is connected to the connector via the second rotating shaft, when the second connecting rod rotates about the central axis of the first rotating shaft, the second end of the second connecting rod can also rotate relative to the central axis of the second rotating shaft, thereby changing the angle between the second connecting rod and the connector, thereby achieving dynamic change in the angle between the second connecting rod and the connector, so that the second connecting rod can apply a force to the connector in the direction of the extension of the plug hole to remove the connector from the plug hole. Since the first connecting rod is connected between the two ends of the second connecting rod, the second connecting rod can rotate around the central axis of the first rotating shaft under the action of the first connecting rod. The rotation of the second connecting rod around the central axis of the first rotating shaft can apply a force to the connector connected to the second end of the second connecting rod. Since the plug hole can limit the movement of the connector in the extension direction of the non-plug hole, and the second end of the second connecting rod is connected to the connector through the second rotating shaft, the angle between the second connecting rod and the second connector can be changed, so that the direction of the force applied to the connector by the second connecting rod is the extension direction of the plug hole, so that the connector can be moved out of the plug hole.

[0020] In some embodiments, the steering rod further includes a third link in the form of an elongated strip, a third rotating shaft connected to one end of the third link, and a fourth rotating shaft connected to one end of the first link, wherein one end of the third link is rotatably connected to the other end of the first link via the third rotating shaft, the other end of the third link is connected between the two ends of the second link, and one end of the first link is rotatably connected to the explosion venting plate via the fourth rotating shaft. In this embodiment, since one end of the third link is connected to the first link and the other end of the third link is connected between the two ends of the second link, the connection point between the first link and the third link and the connection point between the second link and the explosion venting plate are spaced apart in the extension direction of the plug-in hole. Therefore, when the explosion venting plate is deformed in the second direction, a lever structure can be formed by the third link and the second link, so that the second link can rotate normally around the central axis of the first rotating shaft. Since one end of the first connecting rod is rotatably connected to the explosion venting plate through the third rotating shaft, and the other end of the first rotating shaft is rotatably connected to the third connecting rod through the fourth rotating shaft, when the explosion venting plate is deformed in the second direction, the force applied to the first connecting rod can be transmitted to the third connecting rod along the length direction of the first connecting rod, thereby reducing the torsional force of the first connecting rod and thus reducing the probability of the first connecting rod breaking.

[0021] In some embodiments, the energy storage device further includes a first connecting portion in the form of an elongated strip and a second fixing rod in the form of an elongated strip connected to the first connecting portion, wherein the length direction of the first connecting portion is perpendicular to the surrounding wall where the explosion vent is located, the length direction of the second fixing rod is parallel to the surrounding wall where the explosion vent is located, and one end of the second connecting rod is connected to the second fixing rod via the first rotating shaft. In this embodiment, since the length direction of the second fixing rod is parallel to the surrounding wall where the explosion vent is located, and the deformation or displacement direction of the explosion vent plate is perpendicular to the surrounding wall where the explosion vent is located, when the explosion vent plate is deformed or displaced, a force can be applied to the non-length direction of the second fixing rod, and the second fixing rod is prone to micro-deformation, thereby enabling the second connecting rod to be displaced in the second direction, so that the second connecting rod can smoothly rotate around the central axis of the first rotating shaft, so as to smoothly remove the connector from the plug hole.

[0022] In some embodiments, the distance from the position where the second connecting rod is connected to the first connecting rod to the position where the second connecting rod is connected to the explosion venting plate is less than the distance from the position where the second connecting rod is connected to the first connecting rod to the position where the second connecting rod is connected to the connector. In this embodiment, because the distance from the position where the second connecting rod is connected to the first connecting rod to the position where the second connecting rod is connected to the explosion venting plate is less than the distance from the position where the second connecting rod is connected to the first connecting rod to the position where the second connecting rod is connected to the connector, the first connecting rod and the second connecting rod form a lever structure, which can amplify the deformation amount, that is, after the explosion venting plate is transmitted through the conductive component, the amount of movement of the connector from the plug-in hole is greater than the deformation amount of the explosion venting plate. Therefore, during design, the depth of the connector inserted into the plug-in hole can be appropriately increased without changing the starting pressure of the explosion venting plate, thereby improving the stability of the connector in fixing the explosion venting plate to the housing.

[0023] In some embodiments, the transmission component includes a fixed pulley and a connecting rope, the transmission component includes a fixed pulley and a connecting rope, the fixed pulley is fixed to the housing or the explosion venting plate, the arrangement direction of the fixed pulley and the plug-in component is the extension direction of the plug-in hole, one end of the connecting rope is connected to the explosion venting plate, and the other end of the connecting rope is connected to the plug-in component, the connecting rope is wound around the fixed pulley, and the end of the other end of the connecting rope connected to the plug-in component is located between the end of the connecting rope connected to the explosion venting plate and the plug-in hole. In this embodiment, since the arrangement direction of the fixed pulley and the plug-in component is the extension direction of the plug-in hole, the connecting rope is wound around the fixed pulley, so that the direction of the tension of the connecting rope can be changed by the fixed pulley. Specifically, through the connecting rope and the fixed pulley, the tension applied to the connecting rope by the explosion venting plate can be converted into tension along the extension direction of the plug-in hole, so as to pull the plug-in component out of the plug-in hole to achieve explosion venting.

[0024] In some embodiments, the length of the connector is adjustable along the extension direction of the plug hole to adjust the depth of insertion of the connector into the plug hole. In this embodiment, since the depth of insertion of the connector into the plug hole can be adjusted, if the length of the connector that can be inserted into the plug hole is too short or too long due to manufacturing tolerances or processing errors, the length of the connector can be adjusted during installation to eliminate processing and manufacturing errors, thereby ensuring the precise activation pressure required by the explosion venting panel. Since the length of the connector does not need to be controlled within a certain precise range during manufacturing, the difficulty of manufacturing the connector is greatly reduced.

[0025] In some embodiments, the connector includes a first elongated rod and a second elongated rod, the second rod being provided with an adjustment hole extending along the direction in which the plug hole extends, and at least a portion of the first rod being mounted within the adjustment hole along the direction in which the plug hole extends, for adjusting the length of the connector along the direction in which the plug hole extends. In this embodiment, when the length of the portion of the first rod located within the adjustment hole varies, the length of the connector varies. Thus, by adjusting the length of the connector along the direction in which the connector extends, the length to which the connector needs to be removed from the connector can be adjusted, thereby adjusting the activation pressure of the explosion vent plate.

[0026] In some embodiments, the first rod is provided with an external thread, the adjustment hole is provided with an internal thread, and the first rod and the second rod are threadedly connected via the external thread and the internal thread. In this embodiment, since the second rod is provided with an adjustment hole along the extension direction of the plug hole, the adjustment hole is provided with an internal thread, and the first rod is threadedly connected within the adjustment hole. The first rod and the second rod are rotated relative to each other to adjust the insertion length of the first rod in the adjustment hole, thereby adjusting the overall length of the plug-in component. Moreover, since the first rod and the second rod are threadedly connected, linear stepless adjustment of the overall length of the plug-in component in the extension direction of the plug hole can be achieved, with higher adjustment accuracy, so that the starting pressure of the explosion venting plate can be controlled within a more precise range.

[0027] In some embodiments, the shell includes a main body and an adjustment portion, the adjustment portion is adjustable relative to the main body in the extension direction of the plug hole, and the plug hole is located on the adjustment portion. In this embodiment, since the plug hole is located on the adjustment portion, and the adjustment portion is equivalent to the main body in the extension direction of the plug hole, the displacement amount required for the connector to be pulled out of the plug hole in the extension direction of the plug hole is adjustable, thereby adjusting the starting pressure of the explosion venting plate. In addition, by adjusting the position of the adjustment portion relative to the main body when installing the connector, processing and manufacturing errors can be eliminated, thereby ensuring the precise starting pressure required for the explosion venting plate. Since there is no need to control the length of the connector within a certain precise range during manufacturing, the difficulty of manufacturing the connector is greatly reduced.

[0028] In some embodiments, the adjustment portion is a round rod structure with an axial direction that is the same as the extension direction of the plug-in hole. The main body is provided with an adjustment hole extending along the extension direction of the plug-in hole. The adjustment hole is provided with an internal thread. The radial outer peripheral surface of the adjustment portion is provided with an external thread. Along the extension direction of the plug-in hole, at least a portion of the adjustment portion is located within the adjustment hole and is threadedly connected by the external thread and the internal thread. The hole provided on the axial end face of the adjustment portion away from the main body and extending in the axial direction of the adjustment portion is the plug-in hole. In this embodiment, since the adjustment portion and the adjustment hole are threadedly connected, linear stepless adjustment of the position of the adjustment portion in the extension direction of the plug-in hole can be achieved, with higher adjustment accuracy, so that the starting pressure of the explosion venting plate can be controlled within a more precise range.

[0029] In some embodiments, the energy storage device further comprises a magnet, which is disposed on the housing and is located within the plug hole or outside the plug hole in the direction in which the plug hole extends, and the plug-in component is magnetically connected to the magnet. In this embodiment, by disposing the magnet on the housing, on the one hand, the relative movement of the magnet and the plug-in component in the direction in which the plug hole extends can be restricted in the normal state of the energy storage device, through the magnetic attraction between the magnet and the plug-in component in the direction in which the plug hole extends. Moreover, when the energy storage device explodes or burns and needs to be vented, the energy storage device is in a high temperature state, and the magnet in this high temperature state can greatly reduce the magnetic attraction between the magnet and the plug-in component. Therefore, when the energy storage device needs to vent, the magnet will not restrict the plug-in component from being smoothly removed from the plug hole in the direction in which the plug hole extends. On the other hand, by disposing the magnet, the relative magnetic attraction between the magnet and the plug-in component can be used to attract the plug-in component to a specified position, thereby achieving the desired installation accuracy. Moreover, when the energy storage device collides or is accidentally touched, causing the explosion relief plate to be deformed to a certain extent (but not separated from the shell), the connector is partially pulled out of the plug hole by the conductive component (not completely pulled out). Under the action of the magnet, the connector can be adsorbed to the specified position, so that the connector is reset, and the starting pressure of the energy storage device in this embodiment will not be changed due to collision or accidental touch, thereby improving the stability of the explosion relief of the energy storage device and the safety of use.

[0030] In some embodiments, a sealant is applied to the connection between the explosion vent plate and the housing, with the sealant and the plug-in hole arranged perpendicularly to the wall surrounding the explosion vent opening. In this embodiment, the shear force exerted on the plug-in component offsets the reaction force of the sealant on the housing when the explosion vent plate is closed, thereby improving the sealing effect between the explosion vent plate and the housing and reducing the risk of water leakage.

[0031] In a second aspect, an embodiment of the present application provides an explosion relief structure, wherein the shell includes a plurality of surrounding walls, the plurality of surrounding walls enclose a receiving space, the surrounding walls are provided with an explosion relief port connected to the receiving space, the shell is provided with a plug hole, the extension direction of the plug hole is set at an acute angle to the surrounding wall provided with the explosion relief port, the explosion relief structure includes an explosion relief plate, a plug-in component and a conductive component, the explosion relief plate is located on the surrounding wall provided with the explosion relief port and is used to seal the explosion relief port; the plug-in component is slidably inserted into the plug hole along the extension direction of the plug hole, and is perpendicular to the plug hole. In the direction of the surrounding wall provided with the explosion vent, part of the shell is located between the plug-in component and the explosion vent plate; one end of the conductive component is connected to the explosion vent plate, and the other end of the conductive component is connected to the plug-in component, and one end and the other end of the conductive component are two opposite ends in the extension direction of the conductive component; in the extension direction of the plug hole, the other end of the conductive component is located between one end of the conductive component and the plug hole, and when the displacement of the explosion vent plate relative to the shell exceeds a value, the conductive component drives the plug-in component to move out of the plug hole. The explosion venting structure in this embodiment can be applied not only to energy storage devices, but also to other structures or equipment that require explosion venting.

[0032] In a third aspect, an embodiment of the present application provides an energy storage system, comprising a power converter and an energy storage device as described in any one of the first aspects above, wherein the power converter is connected to the energy storage device to perform power conversion on the current input into or output from the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0034] FIG1 is an application scenario diagram of an energy storage system provided in an embodiment of the present application;

[0035] FIG2 is a schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0036] FIG3 is a schematic structural diagram of the energy storage device in FIG2 with the door panel and an explosion relief plate hidden;

[0037] FIG4 is a schematic diagram of a portion of the structure of the energy storage device in FIG2 with the components in the receiving space and the door panel hidden;

[0038] FIG5 is a cross-sectional view of a portion of the structure of the energy storage device in the embodiment of FIG2 ;

[0039] FIG6 is a schematic cross-sectional view of the energy storage device in the embodiment of FIG5 ;

[0040] FIG7 is a partial enlarged schematic diagram of point A in FIG6;

[0041] FIG8 is a schematic diagram of the exploded structure of the connector of the energy storage device in the embodiment of FIG2 ;

[0042] FIG9 is a simplified structural diagram of the energy storage device in the embodiment of FIG2 in a normal state;

[0043] FIG10 is a schematic structural diagram of the energy storage device in FIG9 during the explosion relief process, at which time the connector is partially disengaged from the connector hole;

[0044] FIG11 is a schematic structural diagram of the energy storage device in FIG10 during an explosion process, at which time the connector has completely come out of the connector hole;

[0045] FIG12 is a schematic diagram of a partial structure of another energy storage device provided in an embodiment of the present application;

[0046] FIG13 is a schematic diagram of a partial structure of another energy storage device provided in an embodiment of the present application;

[0047] FIG14 is a partial enlarged schematic diagram of point B in FIG13;

[0048] FIG15 is a schematic diagram of a partial structure of another energy storage device provided in an embodiment of the present application.

[0049] Description of reference numerals:

[0050] X, first direction; Y, second direction; L1, central axis of the first rotating shaft; L2, central axis of the second rotating shaft; 1000, energy storage system; 1, energy storage device; 2, power converter; 10, housing; 101, receiving space; 102, plug hole; 20, housing; 21, main body; 21a, surrounding wall; 211, explosion vent; 212, top wall; 2121, fixing hole; 213, side wall; 214, adjustment hole; 215, bottom wall; 22, door panel; 23, second connecting portion; 24, adjustment portion; 30, explosion vent structure; 31, explosion vent plate; 311, assembly hole; 31 3. First connecting part; 314. Second fixing rod; 315. First fixing rod; 32. Connector; 321. First rod; 322. Second rod; 3221. Adjustment hole; 33. Conducting component; 331. First end; 332. Second end; 34. First connecting rod; 35. Steering rod; 351. Second connecting rod; 3511. Third end; 352. First rotating shaft; 353. Second rotating shaft; 354. Third connecting rod; 36. Third rotating shaft; 37. Fourth rotating shaft; 38. Magnet; 39. Sealant; 41. Fixed pulley; 42. Connecting rope; 50. Battery module. DETAILED DESCRIPTION

[0051] The following first explains some of the terms involved in the embodiments of this application.

[0052] The terms "first", "second", etc. in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0053] In this specification, the terms "perpendicular" and "parallel" are explained.

[0054] Vertical: The vertical defined in this application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and structural flatness. It allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0055] Parallel: The parallel defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, allowing for situations where the absolute parallelism is not caused by factors such as assembly tolerance, design tolerance, and the influence of structural flatness. These situations will lead to the sliding fitting part and the first door panel not being absolutely parallel, but this application also defines this situation as parallel.

[0056] FIG1 is an application scenario diagram of an energy storage system 1000 provided in an embodiment of the present application, wherein FIG1 shows that the energy storage system 1000 is applied in three scenarios: a power supply side, a power distribution side, and a user side.

[0057] 1 , the energy storage system 1000 includes an energy storage device 1 and a power converter 2 . The energy storage device 1 is connected to the power converter 2 . The energy storage device is used to store electrical energy. The power converter 2 is used to perform power conversion on the current input to the energy storage device 1 or the current output from the energy storage device 1 .

[0058] The energy storage system 1000 can be used on the power supply side, the distribution side, and the user side. For example, the energy storage system 1000 on the power supply side provides storage and output management for the electric energy output by the DC source. The energy storage system 1000 on the distribution side provides intelligent load management for the transmission and distribution side. The energy storage system 1000 on the user side provides users with peak shaving and valley filling mode and stable power quality management.

[0059] FIG2 is a schematic structural diagram of an energy storage device 1 provided in an embodiment of the present application; FIG3 is a schematic structural diagram of the energy storage device 1 in FIG2 with the door panel and an explosion relief plate hidden.

[0060] 2 and 3 , the energy storage device 1 includes a housing 10 and a battery module 50 housed in the housing 10 . The battery module 50 is used for storing and outputting electric energy. Specifically, the housing 10 encloses a housing space 101 , and the battery module 50 is located in the housing space 101 .

[0061] The present application provides an explosion relief structure 30, which can be applied to the energy storage device 1 in Figure 2. Specifically, the housing 10 includes a shell 20 and the explosion relief structure 30 provided in the present application. The explosion relief structure 30 is installed on the shell 20. When the pressure in the receiving space 101 suddenly increases (such as when an explosion or combustion occurs), the gas in the receiving space 101 can be quickly discharged through the explosion relief structure 30, thereby achieving rapid pressure reduction to prevent the shell 20 from disintegrating and injuring people.

[0062] In some embodiments, the housing 20 includes a main body 21 and a door panel 22 on the main body 21. The door panel 22 is used to open or close the receiving space 101 and is also convenient for user operation. The main body 21 is also provided with an explosion vent 211 for installing an explosion vent structure 30. The explosion vent 211 connects the receiving space 101 with the outside world. The explosion vent structure 30 is installed at the explosion vent 211 and seals the explosion vent 211. When explosion venting is required, the explosion vent structure 30 opens the explosion vent 211 to discharge the gas in the receiving space 101 to the outside world, thereby achieving directional explosion venting through the explosion vent 211 to prevent the housing 20 from disintegrating and injuring people.

[0063] In some embodiments, the main body 21 includes a plurality of surrounding walls 21 a , which enclose the receiving space 101 , and the explosion vent 211 is provided on the surrounding walls 21 a .

[0064] In some embodiments, the main body 21 is roughly rectangular in shape, and the multiple surrounding walls 21a include a top wall 212, a bottom wall 215, and multiple side walls 213 connecting the top wall 212 and the bottom wall 215. When the main body 21 is roughly rectangular in shape, the explosion vent 211 can be arranged on the top wall 212 or on the side wall 213, and the door panel 22 is arranged on the side wall 213.

[0065] In some other embodiments, the shape of the main body 21 may also be roughly cube-shaped, polygonal prism-shaped, cylindrical or truncated cone-shaped.

[0066] It is understandable that the number of explosion relief structures 30 in the energy storage device 1 in the embodiment of the present application can be one, two, or other numbers, and the present application does not make any specific limitation.

[0067] Figure 4 is a schematic diagram of the partial structure of the energy storage device 1 in Figure 2 after the components in the accommodating space 101 and the door panel 22 are hidden. Figure 4 focuses on the position and connection relationship between the explosion-relief structure 30 and the shell 20; Figure 5 is a sectional view of a partial structure of the energy storage device 1 in the embodiment of Figure 2, most of the shell 20 and part of the explosion-relief structure 30 in Figure 5 are hidden, and the connection relationship between one of the explosion-relief structures 30 and the shell 20 is highlighted; Figure 6 is a schematic cross-sectional view of the energy storage device 1 in the embodiment of Figure 5, focusing on the connection relationship between the conductive component of one of the explosion-relief structures 30 and the shell 20 and the explosion-relief plate 31; Figure 7 is a partially enlarged schematic diagram of point A in Figure 6.

[0068] 4-7 , in some embodiments, the explosion relief structure 30 includes an explosion relief plate 31, a connector 32, and a conductive component 33. The explosion relief plate 31 is installed on a surrounding wall 21a provided with an explosion relief opening 211, specifically, it is sealed on the explosion relief opening 211 of the shell 20. The connector 32 fixes the explosion relief plate 31 to the shell 20 by plugging. Specifically, the connector 32 is connected to the explosion relief plate 31 through the conductive component 33. The shell 20 is provided with a plug-in hole 102 adapted to the connector 32. The connector 32 is inserted into the plug-in hole 102 to fix the explosion relief plate 31 to the shell 20. The direction in which the connector 32 is inserted into the insertion hole 102 is referred to as the first direction X. The first direction X will not be further described below. It should be noted that, unlike a threaded connection, after the connector 32 in this embodiment is inserted into the insertion hole 102, the connector 32 and the insertion hole 102 can move relative to each other in the first direction X. For example, in some embodiments, a clearance fit is provided between the connector 32 and the insertion hole 102, thereby allowing the connector 32 to be easily removed from the insertion hole 102. For another example, in other embodiments, the friction between the connector 32 and the insertion hole 102 only prevents the connector 32 from being removed from the insertion hole 102 under its own weight, but allows the connector 32 to be removed from the insertion hole 102 when subjected to a force greater than its own weight. It is understood that the friction between the connector 32 and the insertion hole 102 can be set as needed to adjust the difficulty of removing the connector 32 from the insertion hole 102.

[0069] The insertion direction of the plug-in component 32 is also the extension direction of the plug-in hole 102. For example, when the plug-in hole 102 is a circular hole, the extension direction of the plug-in hole 102 is the axial direction of the plug-in hole 102. For another example, when the plug-in hole 102 is a rectangular long hole, the extension direction of the plug-in hole 102 is the length direction of the plug-in hole 102. It should be noted that the shape of the plug-in hole 102 in the embodiment of the present application is not limited to the "hole" in the popular sense in the field. The main function of the plug-in hole 102 in this embodiment is to limit the movement of the plug-in component 32 on the surrounding wall 21a where the vertical explosion vent 211 is located. As long as the movement of the plug-in component 32 on the surrounding wall 21a where the vertical explosion vent 211 is located can be limited, even if it does not have the shape of a "hole" in the popular sense in the field, it is still the plug-in hole 102 protected in the embodiment of the present application (such as the plug-in hole 102 in Figure 13 below).

[0070] 6 and 7 , in some embodiments, the extension direction of the plug hole 102 is arranged at an acute angle to the surrounding wall 21a provided with the explosion vent 211. In other words, the insertion direction of the connector 32 is arranged at an acute angle to the surrounding wall 21a provided with the explosion vent 211. Since the extension direction of the plug hole 102 is arranged at an acute angle to the surrounding wall 21a provided with the explosion vent 211, the connector 32 and the plug hole 102 are positioned perpendicular to the surrounding wall 21a provided with the explosion vent 211. Part of the housing 20 is located between the connector 32 and the explosion vent plate 31, thereby limiting the movement of the connector 32 relative to the plug hole 102, that is, limiting the relative movement of the housing 20 and the connector 32. The connector 32 is connected to the explosion vent plate 31 via the conductive component 33, thereby limiting the movement of the housing 20 and the explosion vent plate 31 in a direction perpendicular to the surrounding wall 21a provided with the explosion vent 211.

[0071] In this embodiment, the explosion venting plate 31 is fixed to the shell 20 by cooperating with the plug-in connector 32 and the plug-in hole 102. This means that after the plug-in connector 32 is inserted into the plug-in hole 102, the explosion venting plate 31 and the shell 20 are relatively fixed. After the plug-in connector 32 is pulled out from the plug-in hole 102, the explosion venting plate 31 and the shell 20 are no longer relatively fixed. At this time, the explosion venting plate 31 can be detached from the shell 20 to achieve explosion venting.

[0072] Compared to the solution of using explosion-venting bolts and explosion-venting gaskets to fix the explosion-venting plate 31, the starting pressure of the explosion-venting plate 31 depends on the strength of the explosion-venting gasket. When the explosion-venting gasket is bent or broken, the explosion of the explosion-venting plate 31 is realized. This solution mainly limits the relative fixation of the explosion-venting plate 31 and the housing 20 by the support of the explosion-venting gasket. However, the strength of the explosion-venting gasket is not easy to be set too high. After being subjected to external force (less than the starting pressure), metal fatigue is likely to occur, which will easily lead to a decrease in the strength of the explosion-venting gasket, resulting in a decrease in the starting pressure of the explosion-venting plate 31, resulting in the explosion-venting plate 31 not being able to vent normally. Moreover, when tightening the explosion-venting bolts, if the explosion-venting bolts are tightened too tight, the explosion-venting gasket is easily damaged or irreversibly deformed, affecting the stability of the explosion-venting. If it is too loose, sealing problems will occur.

[0073] In this embodiment, the locking restriction between the connector 32 and the plug hole 102 on the housing 20 in a direction other than the insertion direction of the connector 32 (not the first direction X) can limit the movement of the explosion vent plate 31 relative to the housing 20. If the connector 32 is sufficiently strong, the connector 32 can still be prevented from breaking even when subjected to a large torque in the direction other than the first direction X, thereby ensuring the strength of the connection between the explosion vent plate 31 and the housing 20. Because explosion venting in this embodiment is not achieved through the breaking or bending of the connector 32, the strength of the connector 32 can be set to be sufficiently high, thereby preventing metal fatigue caused by repeated external forces (less than the activation pressure) from affecting the strength of the connector 32 and thus the activation pressure of the explosion vent plate 31. Furthermore, there is no problem of overtightening the explosion vent bolts, which affects the explosion venting stability, or overtightening, which affects the sealing performance.

[0074] Furthermore, since this embodiment achieves explosion relief by pulling the connector 32 out of the insertion hole 102, rather than breaking or bending the connector 32, the connector 32 in this embodiment can be reused, thereby saving costs. Furthermore, since the strength of the connector 32 does not need to be controlled to a certain value, the design difficulty of the connector 32 is greatly reduced.

[0075] It should be noted that the activation pressure in the present embodiment refers to the pressure at which the explosion venting plate 31 will exert its explosion venting function when subjected to a pressure reaching the activation pressure. For example, when the pressure in the receiving space 101 reaches the activation pressure, the explosion venting plate 31 will at least partially separate from the housing 20, thereby achieving the explosion venting function.

[0076] In this embodiment, when the energy storage device 1 explodes, the pressure in the receiving space 101 quickly increases to a level greater than the starting pressure of the explosion venting plate 31. The explosion venting plate 31 is deformed or displaced by the pressure. Driven by the conductive component 33, the connector 32 can be subjected to the force of the conductive component 33 in the first direction X, so that the connector 32 is pulled out of the plug hole 102, thereby achieving decoupling between the explosion venting plate 31 and the shell 20, thereby completely venting the explosion.

[0077] In addition, in some embodiments, when a smaller-scale explosion occurs in the energy storage device 1 in this embodiment, the pressure in the containment space 101 increases, but does not reach the activation pressure of the explosion venting plate 31. At this time, the explosion venting plate 31 will produce a smaller deformation or displacement, which is not enough to completely remove the connector 32 from the plug hole 102 through the conductive component 33. When the pressure in the containment space 101 returns to its initial state, the connector 32 can return to its initial position, and the connector 32 will not undergo irreversible deformation, and will not affect the activation pressure of the explosion venting plate 31.

[0078] 6 and 7 , in some embodiments, for the convenience of description, the direction perpendicular to the surrounding wall 21a where the explosion vent 211 is located is set as the second direction Y, which is the same as the second direction Y below, and the second direction Y will not be described in detail below. When the energy storage device 1 needs to vent explosions, the explosion vent plate 31 will move relative to the shell 20 along the second direction Y, thereby achieving explosion venting. It is understandable that when the energy storage device 1 needs to vent explosions, the explosion vent plate 31 can move linearly along the second direction Y, or the explosion vent plate 31 can rotate relative to the shell 20, but the axis of rotation of the explosion vent plate 31 relative to the shell 20 is parallel to the surrounding wall 21a where the explosion vent 211 is located. When the displacement of the explosion vent plate 31 relative to the shell 20 exceeds a value, the explosion vent plate 31 can fully open the explosion vent 211 to achieve explosion venting.

[0079] It should be noted that the “displacement of the explosion venting plate 31 relative to the shell 20” in this embodiment includes both the displacement of the explosion venting plate 31 relative to the shell 20 due to deformation and the displacement of the explosion venting plate 31 relative to the shell 20 when the explosion venting plate 31 is not deformed.

[0080] In some embodiments, when the pressure within the containment space 101 is less than the activation pressure of the explosion venting plate 31, when the explosion venting plate 31 is displaced relative to the housing 20, only the explosion venting plate 31 is deformed. At this time, the explosion venting plate 31 does not open the explosion vent 211 and does not have the ability to relieve pressure. In other embodiments, when the pressure within the containment space 101 is less than the activation pressure of the explosion venting plate 31, when the explosion venting plate 31 is displaced relative to the housing 20, the explosion venting plate 31 and the surrounding wall 21a provided with the explosion vent 211 are no longer sealed, but a gap appears. At this time, the explosion vent 211 is connected to the outside world, and pressure relief can be achieved through the explosion vent 211, but the maximum explosion relief capacity of the explosion vent 211 cannot be achieved.

[0081] 6 and 7 , in some embodiments, the extension direction of the plug hole 102 is parallel to the surrounding wall 21a provided with the explosion venting port 211, so that when the explosion venting plate 31 is subjected to external forces such as vibration and transportation, even if the explosion venting plate 31 is subjected to an external force in the second direction Y, the component of the external force in the second direction Y applied to the explosion venting plate 31 in the first direction X is almost zero, so that it is not easy for the plug-in component 32 to detach from the plug hole 102, thereby ensuring the stability of the explosion venting plate 31 fixed relative to the housing 20.

[0082] In some embodiments, the angle formed by the extension direction of the plug hole 102 and the surrounding wall 21a provided with the explosion vent 211 can also be 0°-45°. Within this range, the plug connector 32 and the plug hole 102 can ensure the stability of the fixation of the explosion vent plate 31 to the housing 20. It is understandable that in other embodiments, the angle formed by the extension direction of the plug hole 102 and the surrounding wall 21a provided with the explosion vent 211 can also be other degrees, as long as the component of the weight of the plug connector 32 in the first direction X is less than the friction between the plug connector 32 and the plug hole 102, and the friction between the plug connector 32 and the plug hole 102 is the product of the component of the weight of the plug connector 32 in the first direction X and the friction coefficient between the plug connector 32 and the plug hole 102.

[0083] 6 and 7 , in some embodiments, one end of the conductive component 33 is connected to the explosion venting plate 31, and the other end of the conductive component 33 is connected to the connector 32. The one end and the other end of the conductive component 33 are two opposite ends of the conductive component 33 in the direction in which the conductive component 33 extends. When the energy storage device 1 explodes, the explosion venting plate 31 is deformed by pressure, thereby driving the conductive component 33 to move. The movement of the conductive component 33 in turn drives the connector 32 to move, thereby driving the connector 32 out of the plug hole 102. In this embodiment, the conductive component 33 is used to convert the deformation or displacement of the explosion venting plate 31 into the amount of connector 32 to be removed from the plug hole 102. The longer the distance the connector 32 needs to be removed from the plug hole 102, the greater the deformation or displacement of the explosion venting plate 31 is required, and the greater the activation pressure of the explosion venting plate 31. The shorter the distance the connector 32 needs to be pulled out of the insertion hole 102, the smaller the deformation or displacement of the explosion venting plate 31 is required to pull the connector 32 out of the insertion hole 102, and the lower the activation pressure of the explosion venting plate 31. Therefore, in this embodiment, by controlling the distance the connector 32 needs to be pulled out of the insertion hole 102, the magnitude of the activation pressure of the explosion venting plate 31 can be controlled. Compared to manufacturing an explosion venting gasket, in this embodiment, controlling the distance the connector 32 needs to be pulled out of the insertion hole 102 is easier to achieve, thereby reducing the difficulty of manufacturing the explosion venting structure 30.

[0084] In some embodiments, in the extension direction of the plug hole 102, the other end of the conductive component 33 is located between one end of the conductive component 33 and the plug hole 102. For the convenience of description, the end of the conductive component 33 connected to the explosion venting plate 31 is set as the first end 331, and the other end of the conductive component 33 connected to the plug connector 32 is set as the second end 332. Since the first end 331 is connected to the explosion venting plate 31 and the second end 332 is connected to the plug connector 32, the explosion venting plate 31 is deformed or displaced under the action of pressure. The deformation or displacement of the explosion venting plate 31 transmits the tensile force caused by the deformation or displacement to the conductive component 33 through the first end 331, and then transmits the force to the plug connector 32 through the second end 332. Since the second end portion 332 is located between the first end portion 331 and the plug hole 102, that is, the first end portion 331 is located on the side of the second end portion 332 away from the plug hole 102 in the first direction X, the tensile force brought by the deformation or displacement of the explosion venting plate 31 to the conductive component 33 has a component force applied to the plug connector 32 in the first direction X, and the component force is in the direction of pulling out the plug connector 32, so that the plug connector 32 can be pulled out of the plug hole 102. When the plug connector 32 is pulled out, the explosion venting plate 31 can be separated from the housing 20, thereby achieving explosion venting.

[0085] It should be noted that the first end portion 331 may be connected to the explosion relief plate 31 directly or indirectly.

[0086] In order to improve the fixing stability of the connector 32 between the explosion venting plate 31 and the shell 20, referring to Figures 4 to 7, in some embodiments, the energy storage device 1 also includes a first connecting portion 313 connected to the explosion venting plate 31, and the first connecting portion 313 is provided with an assembly hole 311. The shell 20 is provided with a plug hole 102. The assembly hole 311 extends in the same direction as the plug hole 102. The connector 32 is inserted into the assembly hole 311 and the plug hole 102 along the first direction X. At this time, the explosion venting plate 31 can be fixed to the shell 20. In this embodiment, since the plug-in component 32 is inserted into the assembly hole 311 and the plug-in hole 102, and can be pulled out through the conductive component 33, the fixation of the explosion venting plate 31 and the explosion venting of the explosion venting plate 31 are achieved through the cooperation between the plug-in component 32, the assembly hole 311 and the plug-in hole 102. Specifically, through the cooperation between the assembly hole 311 and the plug-in component 32, the plug-in component 32 inserted into the assembly hole 311 along the first direction X can limit the relative movement of the plug-in component 32 and the first connecting portion 313 in directions other than the first direction X, thereby achieving relative fixation of the position between the plug-in component 32 and the explosion venting plate 31. Similarly, through the cooperation between the plug-in hole 102 and the plug-in component 32, the position between the plug-in component 32 and the shell 20 can be relatively fixed, thereby achieving relative fixation between the explosion venting plate 31 and the shell 20.

[0087] In some embodiments, the connector 32 is clearance-fitted with the assembly hole 311 and the plug hole 102. Since the connector 32 is clearance-fitted with the assembly hole 311 and the plug hole 102, the assembly hole 311 and the plug hole 102 require low manufacturing precision, are easy to manufacture, and are convenient for production.

[0088] In some embodiments, the first connection portion 313 and the explosion venting plate 31 are integrally formed to improve the connection stability between the first connection portion 313 and the explosion venting plate 31. In other embodiments, the first connection portion 313 and the explosion venting plate 31 can also be welded, bonded or fixedly connected by fixing parts.

[0089] The shape of the first connection portion 313 is not specifically limited, and may be, for example, a rod, a plate, a cylinder, or other regular or irregular shapes.

[0090] Referring to Figures 4-7, in some embodiments, the housing 20 includes a second connecting portion 23, a first connecting portion 313 extending into the receiving space 101 and corresponding in position to the second connecting portion 23 in the first direction X, and a plug hole 102 formed on the second connecting portion 23 along the first direction X. The assembly hole 311 and the plug hole 102 correspond in position along the first direction X, thereby allowing the connector 32 to be easily inserted into the assembly hole 311 and the plug hole 102, thereby further streamlining the structure of the energy storage device 1. Specifically, the connector 32 inserted into the plug hole 102 along the first direction X can restrict relative movement between the connector 32 and the second connecting portion 23 in directions other than the first direction X. As a result, the connector 32 can restrict relative movement between the first connecting portion 313 and the second connecting portion 23 in directions other than the first direction X.

[0091] In some embodiments, each explosion venting plate 31 is connected to at least two first connection parts 313, and the two first connection parts 313 are arranged opposite to each other in the first direction X. The shell 20 also includes at least two second connection parts 23, and the two second connection parts 23 correspond to and abut against the two first connection parts 313, so that the relative movement of the first connection part 313 and the second connection part 23 can also be limited in the first direction X. Therefore, when the energy storage device 1 is in normal use, the degrees of freedom of the first connection part 313 and the second connection part 23 in all directions are restricted, so that the explosion venting plate 31 can be stably fixed to the shell 20 through the first connection part 313 and the second connection part 23.

[0092] 4 and 5 , in some embodiments, four first connection portions 313 are connected to each explosion venting plate 31, and are arranged in pairs relative to each other along a first direction X. The first direction X is determined by the direction in which the connector 32 is inserted into the assembly hole 311. Different connectors 32 may be inserted into the assembly holes 311 of different first connection portions 313 in different directions, and thus different first connection portions 313 may correspond to different first directions X. Since the first connection portions 313 are arranged in pairs relative to each other along the first direction X, the first connection portions 313 can cooperate with the second connection portions 23 in the first direction X to limit relative movement between the first connection portions 313 and the second connection portions 23 in the first direction X.

[0093] In some embodiments, the number of the first connecting portions 313 on each explosion relief plate 31 may be 6, 8, or another number.

[0094] Of course, in some embodiments, the number of the first connecting portion 313 on each explosion venting plate 31 may be only one. In this case, other limiting structures are required to limit the relative movement of the explosion venting plate 31 and the housing 20 in the first direction X.

[0095] It is understandable that each first connection portion 313 may be correspondingly provided with a conductive component 33 and a plug-in connector 32 , and each first connection portion 313 may be correspondingly provided with a second connection portion 23 .

[0096] 4-7 , in some embodiments, the explosion vent 211 is provided on the top wall 212 of the main body 21 , the second connection portion 23 is connected to the top wall 212 of the main body 21 and is located within the receiving space 101 , the second connection portion 23 is spaced from the side wall 213 of the main body 21 , and the plug-in hole 102 can be a blind hole or a through hole, depending on the length of the connector 32 that needs to be inserted into the plug-in hole 102 .

[0097] In some embodiments, the plug hole 102 is a blind hole. When the plug hole 102 is a blind hole, the plug connector 32 can be abutted against the bottom wall of the plug hole 102 to limit the depth of the plug connector 32 inserted into the plug hole 102.

[0098] For another example, in some other embodiments, the plug hole 102 is a through hole, and after the connector 32 is inserted into the plug hole 102, a portion thereof extends out of the plug hole 102 in the insertion direction. In this case, the length of the connector 32 located in the plug hole 102 and the length of the portion of the connector 32 extending out of the plug hole 102 in the insertion direction need to be calculated in the length that the connector 32 needs to be inserted into the plug hole 102. In other words, the length that the connector 32 needs to be inserted into the plug hole 102 is the same as the displacement of the connector 32 when the connector 32 needs to be removed from the plug hole 102.

[0099] It is understandable that the second connection portion 23 may also be fixedly connected to the side wall 213 of the main body 21 , or fixedly connected to both the side wall 213 and the top wall 212 of the main body 21 .

[0100] It is understandable that the second connecting portion 23 may be in the shape of a plate, a column, a rod, or other shapes. The embodiment of the present application does not specifically limit the shape of the second connecting portion.

[0101] In some other embodiments, the plug hole 102 may be directly opened on the side wall 213 of the main body 21 . In this case, the plug hole 102 is a blind hole to ensure the airtightness of the receiving space 101 .

[0102] Referring to Figure 6 , in some embodiments, the explosion relief structure 30 further includes a magnet 38 . The magnet 38 is disposed on the second connecting portion 23 and is located within the insertion hole 102 or outside the insertion hole 102 in the direction in which the insertion hole 102 extends. The magnet 38 is magnetically connected to the connector 32 . By disposing the magnet 38 on the bottom wall of the insertion hole 102 , the magnetic attraction between the magnet 38 and the connector 32 in the first direction X can restrict relative movement between the magnet 38 and the connector 32 in the first direction X when the energy storage device 1 is in a normal state. Furthermore, when the energy storage device 1 explodes or burns and explosion relief is required, the magnet 38 is in a high temperature state, which significantly reduces the magnetic attraction between the magnet 38 and the connector 32. Therefore, when the energy storage device 1 needs to vent the explosion, the magnet 38 will not restrict the connector 32 from being removed from the insertion hole 102 in the first direction X. On the other hand, by providing the magnet 38, the relative magnetic attraction between the magnet 38 and the connector 32 can be used to attract the connector 32 to the designated position, thereby achieving the desired installation accuracy. Moreover, when the energy storage device 1 is subjected to a collision, accidental contact, etc., causing the explosion relief plate 31 to undergo a certain deformation or displacement (but not detached from the housing 20), the connector 32 is partially pulled out of the plug hole 102 by the conductive component 33 (not completely pulled out). Under the action of the magnet 38, the connector 32 can be attracted to the designated position, causing the connector 32 to reset. This ensures that the starting pressure of the energy storage device 1 in this embodiment will not be changed due to collisions or accidental contact, thereby improving the stability of the explosion relief of the energy storage device 1 and the safety of use.

[0103] 5 and 6 , in some embodiments, in the second direction Y, the projection of the first end 331 on the explosion venting plate 31 is located in the middle position of the explosion venting plate 31, and the projection of the second end 332 on the explosion venting plate 31 is located at the edge position of the explosion venting plate 31. Specifically, in the second direction Y, the projection of the first end 331 on the explosion venting plate 31 is located in the middle position of the explosion venting plate 31, and the projection of the second end 332 on the explosion venting plate 31 is located at the edge position of the explosion venting plate 31. Since in the second direction Y, the projection of the second end 332 on the explosion venting plate 31 is located at the edge of the explosion venting plate 31, the explosion venting plate 31 is fixed to the shell 20 at the edge of the explosion venting plate 31. Therefore, when the energy storage device 1 explodes or burns and needs to be vented, the deformation of the middle position of the explosion venting plate 31 intersects the deformation of the edge part of the explosion venting plate 31. It is larger and more obvious. In the second direction Y, the projection of the first end 331 on the explosion venting plate 31 is located in the middle position of the explosion venting plate 31, so that the middle position of the explosion venting plate 31 with a larger deformation can drive the conductive component 33 to have a larger displacement in the second direction Y, and then enable the connector 32 to have a larger displacement in the first direction X, so that the connector 32 can be smoothly pulled out from the plug hole 102 when an explosion occurs.

[0104] In some embodiments, the conductive assembly 33 includes an elongated first connecting rod 34 and a steering rod 35 connected to the first connecting rod 34. The first end 331 is the end of the first connecting rod 34 connected to the explosion venting plate 31, and the second end 332 is the end of the steering rod 35 connected to the connector 32. The angle between the steering rod 35 and the connector 32 is adjustable to enable the connector 32 to move relative to the insertion hole 102 along the first direction X. In this embodiment, since the deformation or displacement direction of the explosion venting plate 31 is the second direction Y, the direction of movement of the connector 32 when it is removed is the first direction X. The function of the steering rod 35 is to convert the direction of the force applied by the explosion venting plate 31 to the conductive assembly 33 via the first end 331, so that the direction of the force applied by the conductive assembly 33 to the connector 32 via the second end 332 is the first direction X, thereby driving the connector 32 to move relative to the insertion hole 102 along the first direction X for removal from the insertion hole 102. Specifically, since the angle between the steering rod 35 and the connector 32 is adjustable, the force applied to the steering rod 35 can be converted into a force in the first direction X and applied to the connector 32 to move the connector 32 out of the connector hole 102.

[0105] In some embodiments, the steering rod 35 includes an elongated second connecting rod 351 and a first rotating shaft 352 and a second rotating shaft 353 connected to both ends of the second connecting rod 351. One end of the second connecting rod 351 is rotatably connected to the explosion venting plate 31 via the first rotating shaft 352. The end of the second connecting rod 351 connected to the first rotating shaft 352 is defined as the first end. Since the first end is rotatably connected to the explosion venting plate 31 via the first rotating shaft 352, the angle between the second connecting rod 351 and the explosion venting plate 31 can dynamically change with the deformation or displacement of the explosion venting plate 31, thereby enabling the second connecting rod 351 to rotate about the central axis L2 of the second rotating shaft 353. It should be noted that the central axis L1 of the first rotating shaft 352 is perpendicular to the first connecting rod 34 and the second connecting rod 351.

[0106] The other end of the second connecting rod 351 is rotatably connected to the connector 32 via the second rotating shaft 353. The other end of the second connecting rod 351 is referred to as the second end. Since the second end is connected to the connector 32 via the second rotating shaft 353, when the second connecting rod 351 rotates about the central axis L1 of the first rotating shaft 352, the second end of the second connecting rod 351 can also rotate relative to the central axis L2 of the second rotating shaft 353, thereby changing the angle between the second connecting rod 351 and the connector 32. This allows the second connecting rod 351 to apply a force in the first direction X to the connector 32 to remove the connector 32 from the insertion hole 102. It should be noted that the central axis L2 of the second rotating shaft 353 is perpendicular to the first direction X and the second direction Y, respectively.

[0107] The first link 34 is connected between the two ends of the second link 351, so that under the action of the first link 34, the second link 351 can rotate around the central axis L1 of the first rotating shaft 352. The rotation of the second link 351 around the central axis L1 of the first rotating shaft 352 can apply a force to the connector 32 connected to the second end of the second link 351. Since the plug hole 102 can limit the movement of the connector 32 in a direction other than the first direction X, and the second end of the second link 351 is connected to the connector 32 through the second rotating shaft 353, the angle between the second link 351 and the second connector 32 can be changed, so that the direction of the force applied to the connector 32 by the second link 351 is the first direction X, so that the connector 32 can be moved out of the plug hole 102.

[0108] It should be noted that although the first connecting rod 34, the second connecting rod 351, the connector 32, the explosion venting plate 31, and the housing 20 are all rigid structures, when the energy storage device 1 explodes, the first connecting rod 34, the second connecting rod 351, the connector 32, the explosion venting plate 31, and the housing 20 are susceptible to large forces. At this time, the first connecting rod 34, the second connecting rod 351, the connector 32, the explosion venting plate 31, and the housing 20 may all undergo micro-deformations that do not damage their own structures. It is precisely because the first connecting rod 34, the second connecting rod 351, the connector 32, the explosion venting plate 31, and the housing 20 can undergo micro-deformations under special circumstances such as an explosion of the energy storage device 1 that, while the connector hole 102 has a limiting effect on the connector 32 in a direction other than the first direction X, the second connecting rod 351 can still rotate about the central axis L1 of the first rotating shaft 352, thereby driving the connector 32 to move out of the connector hole 102 along the first direction X.

[0109] In some embodiments, the explosion venting plate 31 further includes a second fixed rod 314 in the form of an elongated strip, and the second fixed rod 314 is connected to the explosion venting plate 31. For example, in some embodiments, the second fixed rod 314 is connected to the first connecting portion 313. Of course, in other embodiments, the second fixed rod 314 can also be connected to the explosion venting plate 31.

[0110] The length direction of the second fixing rod 314 is set at an angle to the second direction Y. Since the length direction of the second fixing rod 314 is set at an angle to the second direction Y, and the second direction Y is the deformation or displacement direction of the explosion venting plate 31, when the explosion venting plate 31 is deformed or displaced, a force can be applied to the non-length direction of the second fixing rod 314, so that the second fixing rod 314 is prone to micro-deformation, thereby allowing the second connecting rod 351 to be displaced along the second direction Y, so that the second connecting rod 351 can smoothly rotate around the central axis L1 of the first rotating shaft 352, so as to smoothly remove the connector 32 from the plug hole 102.

[0111] For example, in some embodiments, the length direction of the second fixing rod 314 is arranged parallel to the first direction X. Under the premise that the plug hole 102 has a limiting effect on the plug connector 32 in a direction other than the first direction X, the second connecting rod 351 can still rotate around the central axis L1 of the first rotating shaft 352 and drive the plug connector 32 to move out of the plug hole 102 along the first direction X.

[0112] One end of the second connecting rod 351 is connected to the second fixing rod 314 through the first rotating shaft 352 .

[0113] In some embodiments, the steering rod 35 also includes a third link 354 in the form of an elongated strip, one end of the third link 354 is connected to the first link 34, and the other end of the third link 354 is connected between the two ends of the second link 351, so that the connection position between the first link 34 and the third link 354 and the connection position between the second link 351 and the explosion-proof plate 31 (specifically, the position connected to the second fixed rod 314) are spaced apart in the first direction X, so that when the explosion-proof plate 31 is deformed or displaced in the second direction Y, a lever structure can be formed by the third link 354 and the second link 351, so that the second link 351 can rotate normally around the central axis L1 of the first rotating shaft 352.

[0114] In some embodiments, the transmission assembly 33 further includes a third rotating shaft 36 connected to one end of the third connecting rod 354 and a fourth rotating shaft 37 connected to the first end 331 of the first connecting rod 34. The third connecting rod 354 is rotatably connected to the first connecting rod 34 via the third rotating shaft 36, and the first connecting rod 34 is rotatably connected to the explosion venting plate 31 via the fourth rotating shaft 37. The central axes of the third rotating shaft 36 and the fourth rotating shaft 37 are respectively perpendicular to the first direction X and the second direction Y. In this embodiment, because one end of the first connecting rod 34 is rotatably connected to the explosion venting plate 31 via the third rotating shaft 36, and the other end of the first rotating shaft 352 is rotatably connected to the third connecting rod 354 via the fourth rotating shaft 37, when the explosion venting plate 31 deforms or displaces in the second direction Y, the force applied to the first connecting rod 34 is transmitted to the third connecting rod 354 along the length of the first connecting rod 34, thereby reducing torsional forces on the first connecting rod 34 and the likelihood of breakage of the first connecting rod 34.

[0115] In some embodiments, the third connecting rod 354 is perpendicular to the second connecting rod 351, thereby effectively increasing the leverage effect and improving the pulling effect on the second connecting rod 351. Of course, in other embodiments, the third connecting rod 354 can also be at other angles to the second connecting rod 351.

[0116] In some embodiments, for ease of description, the end of the second connecting rod 351 used to connect to the third connecting rod 354 is set as the third end 3511, and the distance between the third end 3511 and the connection position of the second connecting rod 351 and the explosion-proof plate 31 is less than the distance between the third end 351 and the connection position of the second connecting rod 351 and the connector 32. Specifically, the distance between the third end 3511 and the center axis L1 of the first rotating shaft 352 is less than the distance between the third end 3511 and the center axis L2 of the second rotating shaft 353. In this embodiment, since the distance between the third end 3511 and the connection position of the second connecting rod 351 and the explosion venting plate 31 is smaller than the distance between the third end 3511 and the connection position of the second connecting rod 351 and the plug-in component 32, the first connecting rod 34 and the second connecting rod 351 form a lever structure of a lever, which can play a role in amplifying the deformation amount, that is, after the explosion venting plate 31 is conducted through the conduction component 33, the movement amount of the plug-in component 32 from the plug-in hole 102 is greater than the deformation or displacement of the explosion venting plate 31. Therefore, during the design, under the premise of not changing the starting pressure of the explosion venting plate 31, the depth of the plug-in component 32 inserted into the plug-in hole 102 can be appropriately increased, thereby improving the stability of the plug-in component 32 in fixing the explosion venting plate 31 on the shell 20.

[0117] It should be noted that the position of the third end 3511 can be designed according to needs. For example, in some other embodiments, when the area of ​​the explosion-proof plate 31 is large, the distance between the third end 3511 and the central axis L1 of the first rotating shaft 352 can be greater than or equal to the distance from the central axis L2 of the second rotating shaft 353.

[0118] 5 , in some embodiments, a sealant 39 is provided at the connection between the explosion venting plate 31 and the housing 20. The sealant 39 and the plug-in hole 102 are arranged in the second direction Y. In this embodiment, the shear force exerted on the plug-in connector 32 is used to offset the reaction force of the sealant 39 on the housing 20 when the explosion venting plate 31 is closed, thereby improving the sealing effect between the explosion venting plate 31 and the housing 20 and reducing the risk of water leakage.

[0119] FIG8 is a schematic diagram of the exploded structure of the connector 32 of the energy storage device 1 in the embodiment of FIG2 .

[0120] 5-8 , in some embodiments, the length of the connector 32 can be adjusted along the first direction X to adjust the depth of insertion of the connector 32 into the insertion hole 102. The depth of insertion of the connector 32 into the insertion hole 102 is equivalent to the distance the connector 32 needs to be moved to be removed from the insertion hole 102. Because the depth of insertion of the connector 32 into the insertion hole 102 can be adjusted, if the length of the connector 32 that can be inserted into the insertion hole 102 is too short or too long due to manufacturing tolerances or processing errors, the length of the connector 32 can be adjusted during installation to eliminate processing and manufacturing errors, thereby ensuring the precise activation pressure required by the explosion venting panel 31. Since the length of the connector 32 does not need to be controlled within a precise range during manufacturing, the difficulty of manufacturing the connector 32 is greatly reduced.

[0121] It should be noted that since the connector 32 is inserted into the plug hole 102 after passing through the assembly hole 311, and once the connector 32 is pulled out of the plug hole 102, the relative movement between the explosion venting plate 31 and the shell 20 cannot be restricted, and explosion venting can be achieved. Therefore, during installation, it is only necessary to consider the depth of the connector 32 inserted into the plug hole 102 to control the starting pressure of the explosion venting plate 31.

[0122] In some embodiments, the connector 32 includes an elongated first rod 321 and an elongated second rod 322. The second rod 322 has an adjustment hole 3221 on its end surface facing the first rod 321, extending along the direction of the plug hole 102. At least a portion of the first rod 321 is mounted within the adjustment hole 3221 along the direction of the plug hole 102, allowing adjustment of the length of the connector 32 along the direction of the plug hole 102, thereby adjusting the required length of the connector 32 to be removed from the plug hole 102. In this embodiment, the length of the connector 32 varies depending on the length of the portion of the first rod 321 located within the adjustment hole 3221. Thus, by adjusting the length of the connector 32 along the direction of the plug hole 102, the required length of the connector 32 to be removed from the plug hole 102 can be adjusted, thereby adjusting the activation pressure of the explosion vent plate 31.

[0123] In some embodiments, the first rod 321 is provided with external threads, and the adjustment hole 3221 is provided with internal threads. The first rod 321 is threadedly connected to the adjustment hole 3221, so that the first rod 321 and the second rod 322 are threadedly connected together via the external threads on the first rod 321 and the internal threads in the adjustment hole 3221. The first rod 321 and the second rod 322 can be rotated relative to each other to adjust the insertion length of the first rod 321 in the adjustment hole 3221, thereby adjusting the overall length of the connector 32. Moreover, because the first rod 321 and the second rod 322 are threadedly connected, the overall length of the connector 32 can be linearly and infinitely adjusted in the first direction X, resulting in higher adjustment accuracy and enabling the activation pressure of the explosion venting plate 31 to be controlled within a more precise range.

[0124] Of course, in some other embodiments, the length of the connector 32 may be adjusted in other ways. For example, the first rod 321 and the second rod 322 may be slidably connected and then fixed by a pin.

[0125] Figure 9 is a simplified structural diagram of the energy storage device 1 in the embodiment of Figure 2 when it is in a normal state; Figure 10 is a structural schematic diagram of the energy storage device 1 in Figure 9 during the explosion relief process, at which time the connector 32 is partially dislodged from the plug hole 102; Figure 11 is a structural schematic diagram of the energy storage device 1 in Figure 10 during the explosion process, at which time the connector 32 has completely dislodged from the plug hole 102.

[0126] 9-11 , when the energy storage device 1 is in a normal state, the explosion venting plate 31 is in a natural state and does not deform due to external force (as shown in FIG9 ). At this time, the connector 32 is inserted into the assembly hole 311 and the plug hole 102 along the first direction X to fix the explosion venting plate 31 to the housing 20 .

[0127] When a large amount of gas is generated in the receiving space 101 of the energy storage device 1 and needs to be vented, such as when the battery module 50 explodes, the explosion venting plate 31 is deformed along the second direction Y, especially the middle part of the explosion venting plate 31 is greatly deformed. The deformation of the explosion venting plate 31 drives the first connecting rod 34 to move outward along the second direction Y. During the outward movement of the first connecting rod 34 along the second direction Y, the first connecting rod 34 rotates relative to the explosion venting plate 31 through the fourth rotating shaft 37. At the same time, the first connecting rod 34 rotates relative to the third connecting rod 354 through the third rotating shaft 36, thereby making the angle between the first connecting rod 34 and the third connecting rod 354 become 0° (as shown in Figure 10). At this time, the force applied to the first connecting rod 34 by the deformation of the explosion venting plate 31 is transmitted to the third connecting rod 354 along the length direction of the first connecting rod 34. When the third connecting rod 354 is vertical When the second link 351 is engaged, the third link 354 applies a pulling force to the second link 351 along its length, and the direction of the pulling force is perpendicular to the second link 351, so that the pulling force applied to the second link 351 by the third link 354 can effectively drive the second link 351 to rotate around the central axis L1 of the first rotating shaft 352. Under the action of the second rotating shaft 353, the angle of the second link 351 relative to the plug-in component 32 changes, so that the second link 351 can apply a pulling force in the first direction X to the plug-in component 32 to pull the plug-in component 32 out of the plug-in hole 102 (as shown in Figures 10 and 11). At this time, the first connecting portion 313 and the second connecting portion 23 no longer restrict each other in the second direction Y and can move relative to each other, so that the explosion venting plate 31 can be detached from the shell 20, thereby completing the explosion venting.

[0128] It is understandable that after the explosion relief is completed, since the conductive component 33 and the connector 32 are not broken, they can be reused, thereby reducing the cost of use.

[0129] FIG12 is a schematic diagram of a partial structure of another energy storage device 1 provided in an embodiment of the present application.

[0130] 12 , the energy storage device 1 includes a housing 20 and an explosion venting plate 31 . The explosion venting plate 31 is connected to the housing 20 for explosion venting of the energy storage device 1 . An assembly hole 311 is provided on the explosion venting plate 31 , and a plug hole 102 is provided on the housing 20 . A connector 32 is inserted into the assembly hole 311 and the plug hole 102 along a first direction X to secure the explosion venting plate 31 to the housing 20 . The explosion venting plate 31 , the assembly hole 311 , and the plug hole 102 can all be referred to in the previous embodiment and will not be described in detail here. The difference between this embodiment and the previous embodiment is that the depth adjustment method of the connector 32 compared to the plug hole 102 is different from that of the previous embodiment.

[0131] The housing 20 includes a main body 21 and an adjustment portion 24. The position of the adjustment portion 24 relative to the main body 21 in the first direction X is adjustable. The insertion hole 102 is located on the adjustment portion 24. Since the insertion hole 102 is located on the adjustment portion 24, the adjustment portion 24 is equivalent to the main body 21 and is adjustable in the first direction X. Therefore, the displacement of the connector 32 in the first direction X required to be removed from the insertion hole 102 in the first direction X is adjustable, thereby adjusting the activation pressure of the explosion venting plate 31. In addition, by adjusting the position of the adjustment portion 24 relative to the main body 21 when installing the connector 32, processing and manufacturing errors can be eliminated, thereby ensuring the precise activation pressure required by the explosion venting plate 31. Since the length of the connector 32 does not need to be controlled within a specific range during manufacturing, the difficulty of manufacturing the connector 32 is greatly reduced.

[0132] In some embodiments, the adjustment portion 24 is a round rod structure having an axial direction that is the same as the extension direction of the insertion hole 102. The main body 21 is provided with an adjustment hole 214 extending in the extension direction of the insertion hole 102. The adjustment hole 214 is provided with an internal thread, and the radial outer peripheral surface of the adjustment portion 24 is provided with an external thread. Along the extension direction of the insertion hole 102, at least a portion of the adjustment portion 24 is located within the adjustment hole 214, and is threadedly connected by the external thread of the adjustment portion 24 and the internal thread of the adjustment hole 214. The hole extending in the axial direction of the adjustment portion 24, which is provided on the axial end surface of the adjustment portion 24 away from the main body 21, serves as the insertion hole 102. Because the adjustment portion 24 and the adjustment hole 214 are threadedly connected, the position of the adjustment portion 24 can be linearly and infinitely adjusted in the first direction X, with higher adjustment accuracy, so that the activation pressure of the explosion venting plate 31 can be controlled within a more precise range.

[0133] FIG13 is a partial structural schematic diagram of another energy storage device 1 provided in an embodiment of the present application; FIG14 is a partial enlarged schematic diagram of point B in FIG13 .

[0134] Referring to Figures 13 and 14 , the energy storage device 1 includes a housing 20, an explosion venting plate 31, a connector 32, and a conductive assembly 33. The explosion venting plate 31 is connected to the housing 20 to vent explosions from the energy storage device 1. The connector 32 and conductive assembly 33 are similar to those described in the previous embodiments and will not be described in detail here. This embodiment differs from the previous embodiments in the connection structure between the explosion venting plate 31 and the housing 20.

[0135] The shell 20 is provided with a fixing hole 2121, and the energy storage device 1 also includes a first fixing rod 315 (equivalent to the first connecting part 313 mentioned above) connected to the explosion relief plate 31. The first fixing rod 315 is in the shape of a long strip. The first fixing rod 315 is inserted into the fixing hole 2121 and a part of the first fixing rod 315 extends out of the fixing hole 2121 along the insertion direction of the first fixing rod 315. The part of the first fixing rod 315 extending out of the fixing hole 2121 is provided with an assembly hole 311, and the plug-in component 32 is inserted into the assembly hole 311 and the plug-in hole 102. In this embodiment, by inserting the first fixing rod 315 into the fixing hole 2121, the explosion venting plate 31 and the housing 20 can be restricted from relative movement in a direction parallel to the surrounding wall 21a provided with the explosion venting opening 211. The assembly hole 311 is formed on the portion of the first fixing rod 315 that extends beyond the fixing hole 2121, and the connector 32 is inserted into the assembly hole 311 and the plug hole 102 along the extension direction of the plug hole 102, thereby restricting the first fixing rod 315 from moving relative to the housing 20 in a direction other than the extension direction of the plug hole 102, thereby securing the explosion venting plate 31 to the housing 20. In addition, the fixing hole 2121 can be directly formed on the outer wall of the housing 20, such as directly on the top wall 212 of the housing 20, without the need for a structure similar to the second connecting portion 23 described above. This makes the structure of the housing 20 simpler, not only does it not occupy the receiving space 101, but also reduces the manufacturing difficulty of the housing 20.

[0136] In some embodiments, the insertion direction of the first fixing rod 315 is perpendicular to the insertion direction of the connector 32 , so as to improve the stability of the connector 32 in fixing the explosion venting plate 31 and the housing 20 .

[0137] 13 .

[0138] FIG15 is a partial structural diagram of another energy storage device 1 provided in an embodiment of the present application.

[0139] Referring to Figure 15 , the energy storage device 1 includes a housing 20, an explosion venting plate 31, a connector 32, and a conductive assembly 33. The explosion venting plate 31 is connected to the housing 20 to vent explosions from the energy storage device 1. The housing 20, explosion venting plate 31, and connector 32 can all be described in detail in the previous embodiment and will not be further described here. The difference between this embodiment and the previous embodiment lies in the different structure of the conductive assembly 33.

[0140] The conduction component 33 includes a fixed pulley 41 and a connecting rope 42. The fixed pulley 41 is fixed to the shell 20 or the explosion-proof plate 31. The arrangement direction of the fixed pulley 41 and the connector 32 is the extension direction of the plug-in hole 102. One end of the connecting rope 42 is connected to the explosion-proof plate 31, and the other end of the connecting rope 42 is connected to the connector 32. The connecting rope 42 is wound around the fixed pulley 41, and the end of the other end of the connecting rope 42 connected to the connector 32 is located between the end of the connecting rope 42 connected to the explosion-proof plate 31 and the plug-in hole 102. In this embodiment, since the arrangement direction of the fixed pulley 41 and the connector 32 is the extension direction of the plug hole 102, the connecting rope 42 is wound around the fixed pulley 41, so that the tension direction of the connecting rope 42 can be changed through the fixed pulley 41. Specifically, through the connecting rope 42 and the fixed pulley 41, the tension applied to the connecting rope 42 by the explosion relief plate 31 can be converted into tension along the extension direction of the plug hole 102, so as to pull the connector 32 out of the plug hole 102 to achieve explosion relief.

[0141] In some embodiments, the explosion relief structure 30 further includes a magnet 38, which is used to be magnetically connected to the connector 32. The magnet 38 can be described in the above embodiments and will not be described in detail here.

[0142] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An energy storage device with explosion relief function, characterized in that: The energy storage device comprises: A shell, wherein the shell comprises a plurality of surrounding walls, the plurality of surrounding walls enclose a receiving space, the surrounding walls are provided with an explosion relief opening communicating with the receiving space, the shell is provided with a plug hole, and an extending direction of the plug hole is arranged at an acute angle with the surrounding wall provided with the explosion relief opening; A battery module, wherein the battery module is located in the receiving space; An explosion venting plate, the explosion venting plate is located on the surrounding wall provided with the explosion venting opening and is used to cover the explosion venting opening; A plug-in connector, the plug-in connector being slidably inserted into the plug-in hole along an extending direction of the plug-in hole; and A conduction component, one end of the conduction component is connected to the explosion-proof plate, and the other end of the conduction component is connected to the connector, and the one end and the other end of the conduction component are two opposite ends in the extension direction of the conduction component; in the extension direction of the plug hole, the other end of the conduction component is located between one end of the conduction component and the plug hole.

2. The energy storage device according to claim 1, characterized in that: The energy storage device also includes a first connecting portion connected to the explosion relief plate, the first connecting portion is provided with an assembly hole, the assembly hole and the plug-in hole are arranged along the extension direction of the plug-in hole, and the plug-in component is inserted into the assembly hole and the plug-in hole.

3. The energy storage device according to claim 2, characterized in that: The housing includes a second connection portion for opening the plug hole, and an arrangement direction of the first connection portion and the second connection portion is an extension direction of the plug hole.

4. The energy storage device according to claim 1, characterized in that: The shell is provided with a fixing hole, and the energy storage device also includes a first fixing rod connected to the explosion-proof plate, the first fixing rod is inserted in the fixing hole and a portion of the first fixing rod extends out of the fixing hole along the insertion direction of the first fixing rod, and a portion of the first fixing rod extending out of the fixing hole is provided with an assembly hole, and the connector is inserted in the assembly hole and the insertion hole.

5. The energy storage device according to claim 1, characterized in that: The extension direction of the plug hole is arranged parallel to the surrounding wall provided with the explosion relief hole.

6. The energy storage device according to claim 1, characterized in that: The conduction component includes a first connecting rod in the shape of a long strip and a steering rod, one end of the first connecting rod is connected to the explosion-proof plate, the other end of the first connecting rod is connected to one end of the steering rod, the other end of the steering rod is rotatably connected to the connector, and the other end of the steering rod connected to the connector is located between one end of the first connecting rod connected to the explosion-proof plate and the connector hole.

7. The energy storage device according to claim 2, characterized in that: The conduction component includes a first connecting rod in the shape of a long strip and a steering rod, one end of the first connecting rod is connected to the explosion-proof plate, the other end of the first connecting rod is connected to one end of the steering rod, the other end of the steering rod is rotatably connected to the connector, and the other end of the steering rod connected to the connector is located between one end of the first connecting rod connected to the explosion-proof plate and the connector hole.

8. The energy storage device according to claim 4, characterized in that: The conduction component includes a first connecting rod in the shape of a long strip and a steering rod, one end of the first connecting rod is connected to the explosion-proof plate, the other end of the first connecting rod is connected to one end of the steering rod, the other end of the steering rod is rotatably connected to the connector, and the other end of the steering rod connected to the connector is located between one end of the first connecting rod connected to the explosion-proof plate and the connector hole.

9. The energy storage device according to claim 6, characterized in that: The steering rod includes a second connecting rod in the shape of a long strip and a first rotating shaft and a second rotating shaft connected to both ends of the second connecting rod. One end of the second connecting rod is rotatably connected to the explosion-proof plate through the first rotating shaft, and the other end of the second connecting rod is rotatably connected to the connector through the second rotating shaft. The first connecting rod is connected between the two ends of the second connecting rod.

10. The energy storage device according to claim 9, characterized in that: The steering rod also includes a third connecting rod in the shape of a long strip, a third rotating shaft connected to one end of the third connecting rod, and a fourth rotating shaft connected to one end of the first connecting rod. One end of the third connecting rod is rotatably connected to the other end of the first connecting rod through the third rotating shaft, the other end of the third connecting rod is connected between the two ends of the second connecting rod, and one end of the first connecting rod is rotatably connected to the explosion-proof plate through the fourth rotating shaft.

11. The energy storage device according to claim 10, characterized in that: The energy storage device also includes a first connecting portion in the shape of an elongated strip and a second fixing rod in the shape of an elongated strip connected to the first connecting portion. The length direction of the first connecting portion is perpendicular to the surrounding wall where the explosion vent is located, the length direction of the second fixing rod is parallel to the surrounding wall where the explosion vent is located, and one end of the second connecting rod is connected to the second fixing rod through the first rotating shaft.

12. The energy storage device according to claim 9, characterized in that: The distance from the position where the second connecting rod is connected to the first connecting rod to the position where the second connecting rod is connected to the explosion relief plate is smaller than the distance from the position where the second connecting rod is connected to the first connecting rod to the position where the second connecting rod is connected to the connector.

13. The energy storage device according to claim 1, characterized in that: The conduction component includes a fixed pulley and a connecting rope, the fixed pulley is fixed to the shell or the explosion-proof plate, the arrangement direction of the fixed pulley and the connector is the extension direction of the plug-in hole, one end of the connecting rope is connected to the explosion-proof plate, and the other end of the connecting rope is connected to the connector, the connecting rope is wound around the fixed pulley, and the end of the other end of the connecting rope connected to the connector is located between the end of one end of the connecting rope connected to the explosion-proof plate and the plug-in hole.

14. The energy storage device according to claim 1, characterized in that: The connector includes a first rod member in the shape of an elongated strip and a second rod member in the shape of an elongated strip. The second rod member is provided with an adjustment hole along the extension direction of the plug hole on the end surface facing the first rod member. At least a portion of the first rod member is installed in the adjustment hole along the extension direction of the plug hole for adjusting the length of the connector along the extension direction of the plug hole.

15. The energy storage device according to claim 1, characterized in that: The shell includes a main body and an adjusting portion in the shape of a round rod, the axial direction of the adjusting portion is the same as the extension direction of the plug-in hole, the main body is provided with an adjusting hole extending along the extension direction of the plug-in hole, the adjusting hole is provided with an internal thread, the radial outer peripheral surface of the adjusting portion is provided with an external thread, along the extension direction of the plug-in hole, at least part of the adjusting portion is located in the adjusting hole and is threadedly connected by the external thread and the internal thread, and the hole opened on the axial end face of the adjusting portion away from the main body and extending in the axial direction of the adjusting portion is the plug-in hole.

16. The energy storage device according to claim 14 or 15, characterized in that: The energy storage device further comprises a magnet, which is arranged on the shell and located inside the plug hole or outside the plug hole in the direction in which the plug hole extends, and the plug connector is magnetically connected to the magnet.

17. The energy storage device according to claim 1, characterized in that: A sealant is provided at the connection between the explosion relief plate and the shell, and the sealant and the plug hole are arranged in a direction perpendicular to the surrounding wall where the explosion relief port is located.

18. The energy storage device according to claim 1, characterized in that: When the explosion relief plate is displaced relative to the housing and exceeds a value, the conductive component drives the connector to move out of the connector hole.

19. An energy storage system, characterized in that: It comprises a power converter and an energy storage device as described in any one of claims 1 to 18, wherein the power converter is connected to the energy storage device to perform power conversion on the current input to or output from the energy storage device.

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