Explosion-proof valve, end cover assembly, energy storage device and electric equipment

Abstract

The utility model discloses an anti-explosion valve, an end cover assembly, an energy storage device and electric equipment, and relates to the technical field of energy storage. The anti-explosion valve comprises a valve plate body provided with an opening part, and the opening part can be opened when the pressure of one side of the valve plate body is larger than the valve opening pressure; the fixing part comprises a body part and a first positioning structure arranged on the body part, and the body part is arranged on the periphery of the valve plate body in a surrounding mode and connected with the valve plate body; the first positioning structure is located on the side edge portion of the body portion, and in the extending direction of the side edge portion, the first positioning structure is eccentrically arranged or is of an asymmetric structure. In the embodiment of the invention, the eccentric first positioning structure or the asymmetric first positioning structure is arranged on the body part, so that asymmetric design of the fixing part is realized, fool-proof assembly of the explosion-proof valve is ensured, the assembly yield of the end cover assembly is ensured, and meanwhile, the assembly yield of the energy storage device is ensured.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an explosion-proof valve, an end cover assembly, an energy storage device, and electrical equipment. Background Art

[0002] Rechargeable batteries, also known as rechargeable batteries or storage batteries, are batteries that can be recharged after discharge to reactivate their active materials and continue to be used. Their recyclable nature has made them a key source of power for electrical devices. As demand for rechargeable batteries grows, so too are the demands placed on their performance, particularly their lifespan.

[0003] In related technologies, secondary batteries typically consist of an end cap assembly, an electrode assembly, and a casing. The actual production process involves separately manufacturing the end cap assembly, electrode assembly, and casing. Metal adapters are then used to weld the electrode posts and tabs of the end cap assembly to each other. The electrode assembly is then placed within the casing, and the opening of the casing is sealed with the end cap assembly before being welded together to form the basic structure of the secondary battery.

[0004] The end cap assembly includes a cover plate, an electrode column, and an explosion-proof valve. The cover plate has a pressure relief hole, through which the electrode column is inserted. The explosion-proof valve is positioned within the pressure relief hole. The explosion-proof valve is primarily designed to explode and release pressure along the pressure relief hole when the pressure in the housing exceeds the valve opening pressure. However, in related art, the explosion-proof valve is easily installed upside down or backwards on the cover plate, which reduces the assembly yield of the end cap assembly. Utility Model Content

[0005] A main purpose of the present application is to provide an explosion-proof valve, an end cover assembly, an energy storage device and an electrical equipment that can improve the assembly yield.

[0006] To achieve the above application objectives, this application adopts the following technical solutions:

[0007] According to one aspect of the present application, an explosion-proof valve is provided, comprising: a valve plate body, having an opening portion, which can be opened when the pressure on one side of the valve plate body is greater than the valve opening pressure; a fixing portion, comprising a main body portion and a first positioning structure arranged on the main body portion, the main body portion being arranged around the periphery of the valve plate body and connected to the valve plate body; wherein the first positioning structure is located on the side edge of the main body portion, and in the extension direction of the side edge portion, the first positioning structure is eccentrically arranged or is an asymmetric structure.

[0008] In the embodiment of the present application, an asymmetric design of the fixing portion is achieved by providing an eccentric first positioning structure or an asymmetric first positioning structure on the main body, thereby ensuring foolproof assembly of the explosion-proof valve, so as to ensure the assembly yield of the end cover assembly and the assembly yield of the energy storage device.

[0009] According to one embodiment of the present application, the first positioning structure is a positioning convex hull, the positioning convex hull is a non-isosceles triangle structure, and the positioning convex hull is connected to the outer edge of the main body.

[0010] In the embodiment of the present application, the first positioning structure formed by the positioning convex bump on the outer edge of the main body is used to achieve fool-proof assembly of the explosion-proof valve in the pressure relief hole, while simplifying the structure of the fixing part and the structure of the pressure relief hole on the cover plate, thereby improving the manufacturing efficiency and assembly efficiency of the explosion-proof valve and the cover plate.

[0011] According to an embodiment of the present application, the main body has a long side and a wide side, and the positioning convex bump is connected to the outer edge of the long side of the main body.

[0012] In the embodiment of the present application, the positioning convex bump is located at the outer edge of the long side of the main body, which is convenient for reducing the aspect ratio of the explosion-proof valve to achieve a miniaturized setting of the explosion-proof valve.

[0013] According to an embodiment of the present application, the main body has a long side and a wide side, and the positioning convex bump is connected to the outer edge of the wide side of the main body.

[0014] According to one embodiment of the present application, the positioning bulge has a tip facing away from the main body; the distance between the tip and the outer edge of a wide side of the main body is greater than or equal to 1 / 6 of the length of the main body, and less than or equal to 1 / 2 of the length of the main body.

[0015] According to an embodiment of the present application, the distance between the tip and the outer edge of one wide side of the main body is equal to 1 / 4 of the length of the main body.

[0016] According to one embodiment of the present application, the first positioning structure is a positioning protrusion located on a side surface of the main body; the positioning protrusion is eccentrically arranged in an extension direction of the side edge of the main body.

[0017] In the embodiment of the present application, the positioning protrusion on the main body facilitates fool-proof assembly of the explosion-proof valve while improving the stability of the explosion-proof valve in the pressure relief hole.

[0018] According to one embodiment of the present application, the fixing portion further includes a second positioning structure; the second positioning structure is located on the side of the main body, and the minimum distances from the second positioning structure and the first positioning structure to the inner edge of the main body are different.

[0019] In the embodiment of the present application, the second positioning structure cooperates with the first positioning structure to further improve the foolproof effect during assembly of the explosion-proof valve and the stability of the explosion-proof valve assembly.

[0020] According to one embodiment of the present application, the valve plate body includes an annular portion and an opening portion; the opening portion is connected to the inner side of the annular portion, and the annular portion connects the fixed portion and the opening portion, the annular portion includes a connecting section and a bursting section, and the bursting section can be disconnected when the pressure on one side of the valve plate body is greater than the valve opening pressure.

[0021] In the embodiment of the present application, the setting of the connecting section can avoid the situation where the opening part flies around when the blasting section is broken, thereby improving the safety of the explosion-proof valve; in addition, an annular part including the connecting section and the blasting section is provided to simplify the structure of the valve plate body and improve the manufacturing efficiency of the valve plate body.

[0022] According to an embodiment of the present application, the main body includes a positioning segment connected to the connecting segment, and the first positioning structure is connected to the positioning segment.

[0023] According to one aspect of the present application, an end cover assembly is provided, comprising: a cover plate, the cover plate having a pressure relief hole, the hole wall of the pressure relief hole having a first positioning groove; the explosion-proof valve described in the above aspect, the explosion-proof valve is limited in the pressure relief hole, and the first positioning structure is limited in the first positioning groove.

[0024] In the embodiment of the present application, a matching limit is set between the first positioning structure on the explosion-proof valve and the first positioning groove on the pressure relief hole, thereby realizing fool-proof assembly of the explosion-proof valve in the pressure relief hole, thereby improving the assembly yield of the end cover assembly and the assembly yield of the energy storage device.

[0025] According to one aspect of the present application, an energy storage device is provided, comprising: a shell including a housing having an opening; an electrode assembly accommodated in the housing cavity; and the end cap assembly described in the above aspect, wherein the end cap assembly seals the opening of the housing cavity.

[0026] According to one aspect of the present application, an electric device is provided, wherein the electric device includes the energy storage device described in the above aspect, and the energy storage device supplies power to the electric device.

[0027] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other features and advantages of the present application will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

[0029] Figure 1 is a schematic diagram showing an energy storage system according to an exemplary embodiment.

[0030] Figure 2 is a schematic top view of the structure of an energy storage device according to an exemplary embodiment.

[0031] Figure 3 yes Figure 2 The schematic cross-sectional structure diagram of the energy storage device shown is along the section line AA'.

[0032] Figure 4 It is a schematic diagram of an exploded structure of an end cover assembly from an axonometric top view according to the relevant technology.

[0033] Figure 5 It is a schematic diagram of an exploded structure of an end cover assembly viewed from above, as viewed from an axonometric perspective, according to the relevant technology.

[0034] Figure 6 The figure is a schematic diagram of an exploded structure of an end cover assembly in an axonometric top view according to an exemplary embodiment.

[0035] Figure 7 The figure is a schematic diagram of an exploded structure of an end cover assembly viewed from above, shown in an axonometric perspective, according to an exemplary embodiment.

[0036] Figure 8 It is a schematic diagram of an axonometric top view of an explosion-proof valve according to an exemplary embodiment.

[0037] Figure 9 FIG1 is a schematic top view of the structure of an explosion-proof valve according to an exemplary embodiment.

[0038] Figure 10 It is a schematic diagram showing the arrangement structure of an explosion-proof valve according to an exemplary embodiment.

[0039] Figure 11 The figure is a schematic diagram of an exploded structure of another end cover assembly shown in an axonometric top view according to an exemplary embodiment.

[0040] Figure 12 The figure is a schematic diagram of an exploded structure of another end cover assembly viewed from above according to an exemplary embodiment.

[0041] Figure 13 It is a schematic structural diagram of an electric device according to an exemplary embodiment.

[0042] The description of the accompanying drawings is as follows:

[0043] 100, energy storage device; 200, electric energy conversion device; 300, user load; 400, electrical equipment;

[0044] 10. Shell; 20. Electrode assembly; 30. End cap assembly;

[0045] 11. Accommodating cavity;

[0046] 31. Cover plate; 32. Electrode terminal; 33. Explosion-proof valve; 34. Insulation;

[0047] 311, pressure relief hole; 312, first positioning groove; 313, first positioning hole; 314, second positioning hole;

[0048] 331, valve plate body; 332, fixing portion; X, width direction; Y, length direction;

[0049] 3311, annular portion; 3312, opening portion; 3313, connecting section; 3314, blasting section;

[0050] 3321. First positioning structure; 3322. Main body; 3323. Positioning convex bump; 3324. Tip; 3325. Positioning protrusion; 3326. Second positioning structure; 3327. Positioning segment. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0052] Since the energy people need is highly temporal and spatial, in order to make rational use of energy and improve utilization rate, it is necessary to use a medium or equipment to store one form of energy in the same energy form, or convert it into another form of energy, and then release it in a specific energy form based on future applications.

[0053] At present, green energy mainly includes solar energy, wind energy, etc., which generally have the problems of strong intermittency and large volatility, which will cause the voltage of the green power grid to be unstable (not enough electricity during peak hours and too much electricity during low hours). Unstable voltage will cause damage to electricity. Therefore, it may cause the problem of "wind and solar power abandonment" due to insufficient electricity demand or insufficient grid acceptance capacity.

[0054] To address the issue of insufficient electricity demand or insufficient grid capacity, energy storage devices are essential. These devices convert electrical energy into other forms of energy through physical or chemical means, storing it. When needed, the stored energy is converted back into electricity and released. Simply put, an energy storage device acts like a large "power bank," storing electricity when there's sufficient solar or wind energy and releasing it when needed.

[0055] Currently, energy storage (i.e., energy storage) has a wide range of application scenarios, including power generation-side energy storage, grid-side energy storage, renewable energy grid-connected energy storage, and user-side energy storage. The corresponding types of energy storage devices include:

[0056] (1) Large energy storage containers used in grid-side energy storage scenarios can serve as high-quality active and reactive power regulation power sources in the grid, achieving load matching of electricity in time and space, enhancing the ability to absorb renewable energy, and are of great significance in grid system backup, alleviating peak load power supply pressure, and peak and frequency regulation;

[0057] (2) The main operating mode of small and medium-sized energy storage cabinets used in industrial and commercial energy storage scenarios (banks, shopping malls, etc.) on the user side and small household energy storage boxes used in home energy storage scenarios on the user side is "peak shaving and valley filling". Since there is a large price difference in electricity prices at peak and valley locations according to electricity demand, after users have energy storage equipment, in order to reduce costs, they usually charge the energy storage device (energy storage cabinet / box) during the low electricity price period; during the peak electricity price period, the electricity in the energy storage device is discharged for use to achieve the purpose of saving electricity bills. In addition, in remote areas and areas with high incidence of natural disasters such as earthquakes and hurricanes, the existence of household energy storage devices is equivalent to users providing themselves and the power grid with backup power, eliminating the inconvenience caused by frequent power outages due to disasters or other reasons.

[0058] An embodiment of the present application provides an energy storage system, which includes an energy storage device to store or supply electric energy through the energy storage device.

[0059] Taking the household energy storage scenario in user-side energy storage as an example, Figure 1The schematic diagram of an energy storage system provided by an embodiment of the present application is shown. The energy storage system includes an energy storage device 100 and an electric energy conversion device 200 (such as a photovoltaic panel), and a user load 300 (such as a street lamp, household appliance, etc.). The electric energy conversion device 200 is electrically connected to the energy storage device 100, and the energy storage device 100 is electrically connected to the user load 300. The energy storage device 100 is a small energy storage box that can be mounted on an outdoor wall by wall-mounting. Specifically, the electric energy conversion device 200 can convert solar energy into electrical energy and store it through the energy storage device 100, and then supply the user load 300 for use when the electricity price is peak, or supply the user load 300 for use when the power grid is outage / power outage.

[0060] Among them, the energy storage device 100 can be but is not limited to a single cell (secondary battery), and a battery module, battery pack, battery system, etc. composed of single cells. The battery cell can be a lithium-ion battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the battery cell can be cylindrical, flat, rectangular, etc., and the embodiment of the present application does not limit this. Specifically, the battery cell can utilize the chemical reaction or change of the energy storage medium (chemical element) to realize the charging and discharging process. Simply put, the electric energy generated by light energy and wind energy is stored in the battery cell through the chemical reaction or change of the energy storage medium. When the use of external electric energy reaches a peak, the electric energy stored in the battery cell is released for use through the chemical reaction or change of the energy storage medium, or transferred for use.

[0061] In some embodiments, as Figure 2 and Figure 3 As shown, the energy storage device 100 includes: a shell 10, an electrode assembly 20 and an end cover assembly 30. The shell 10 has an open accommodating cavity 11, the electrode assembly 20 is accommodated in the accommodating cavity 11, and the end cover assembly 30 seals the opening of the accommodating cavity 11.

[0062] The shell 10 may be a cylindrical structure with one end open, in which case the energy storage device 100 includes an end cover assembly 30 to seal one opening of the shell 10 . Of course, the shell 10 may also be a cylindrical structure with both ends open, in which case the energy storage device 100 includes an end cover assembly 30 and a cover plate 31 , or includes two end cover assemblies 30 , in which case the two openings of the shell 10 are sealed respectively by one end cover assembly 30 and a cover plate 31 , or two end cover assemblies 30 .

[0063] Among them, such as Figure 3As shown, the end cap assembly 30 includes a cover plate 31, an insulating member 34 (i.e., lower plastic) and an electrode terminal 32. The insulating member 34 is located on the side of the cover plate 31 facing the electrode assembly 20. The electrode terminal 32 is provided on the insulating member 34 and the cover plate 31, and one end is connected to the electrode assembly 20, and the other end is exposed to the outside to serve as an output end of the energy storage device 100; an explosion-proof valve 33 is provided on the cover plate 31. The explosion-proof valve 33 is used to explode when the pressure in the accommodating chamber 11 is greater than the valve opening pressure, and to discharge the gas in the accommodating chamber to improve the safety of the energy storage device 100. In addition, an injection hole can also be provided on the cover plate 31 to inject electrolyte into the accommodating chamber 11 through the injection hole to achieve infiltration of the electrode assembly 20.

[0064] The electrode assembly 20 includes a stacked positive electrode sheet, a negative electrode sheet, and a separator, with the separator located between the positive and negative electrode sheets. The ends of the electrode assembly 20 have positive and negative tabs, which can be located at the same end of the electrode assembly 20 or at different ends of the electrode assembly 20. Taking the example of the positive and negative tabs being located at both ends of the electrode assembly 20, one of the positive and negative tabs is connected to the electrode terminal 32 included in the end cap assembly 30, and the other is connected to the bottom of the housing 10 or the electrode terminal 32 included in the other end cap assembly 30, so that electrical energy from the electrode assembly 20 is output through the electrode terminal 32 of the end cap assembly 30 and the bottom of the housing 10, or through the electrode terminals 32 of both end cap assemblies 30.

[0065] It should be noted that the energy storage device 100 also includes a metal adapter to connect the tab of the electrode assembly 20 with the electrode terminal 32 on the end cover assembly 30 through the metal adapter, thereby ensuring the current carrying capacity between the electrode terminal 32 and the electrode assembly 20.

[0066] In the related art, the end cover assembly 30 includes a cover plate 31 and an explosion-proof valve 33, such as Figure 4 and Figure 5 As shown, the explosion-proof valve 33 has an oblong structure, and the cover plate 31 has a matching oblong pressure relief hole 311. The explosion-proof valve 33 is assembled in the pressure relief hole 311 on the cover plate 31, so that when the pressure in the accommodating cavity 11 of the housing 10 exceeds the opening pressure of the explosion-proof valve 33, it will explode and release pressure along the pressure relief hole 311. However, when the explosion-proof valve 33 is assembled in the pressure relief hole 311, it is easy for the explosion-proof valve 33 to be assembled in the pressure relief hole 311 even if it is installed upside down or turned upside down, thereby reducing the assembly yield of the energy storage device 100.

[0067] The embodiment of the present application provides an end cap assembly 30, such as Figure 6 and Figure 7As shown, the end cap assembly 30 includes a cover plate 31 and an explosion-proof valve 33. The cover plate 31 has a pressure relief hole 311, and the wall of the pressure relief hole 311 has a first positioning groove 312. The explosion-proof valve 33 has a first positioning structure 3321. The explosion-proof valve 33 is restrained within the pressure relief hole 311, and the first positioning structure 3321 is restrained within the first positioning groove 312. This ensures foolproof assembly of the explosion-proof valve 33 within the pressure relief hole 311, thereby improving the assembly yield of the end cap assembly 30. This facilitates improving the assembly yield of the energy storage device 100 including the end cap assembly 30.

[0068] In some embodiments, as Figure 8 or Figure 9 As shown, the explosion-proof valve 33 includes: a valve body 331, having an opening portion 3312, and the opening portion 3312 can be opened when the pressure on one side of the valve body 331 is greater than the valve opening pressure; a fixing portion 332, including a main body 3322 and a first positioning structure 3321 arranged on the main body 3322, and the main body 3322 is arranged around the periphery of the valve body 331 and is connected to the valve body 331; wherein, the first positioning structure 3321 is located on the side of the main body 3322, and in the extension direction of the side, the first positioning structure 3321 is eccentrically arranged, or is an asymmetric structure.

[0069] In the embodiment of the present application, an eccentric first positioning structure 3321 or an asymmetric first positioning structure 3321 is provided on the main body 3322 to achieve an asymmetric design of the fixing portion 332, thereby ensuring the left and right fool-proof assembly and the forward and reverse fool-proof assembly of the explosion-proof valve 33, so as to ensure the assembly yield of the end cover assembly 30.

[0070] Among them, the main body 3322 is a circular ring structure, or an elliptical ring structure. In this case, the entire annular part of the main body 3322 is the side portion, and the extension direction of the side portion is the circumference of the main body 3322; or the main body 3322 is an annular structure including at least one straight side, such as a triangular ring structure, a rectangular ring structure, an elongated ring structure, etc. Taking the rectangular ring structure or the elongated ring structure as an example, the main body 3322 has a long side in the length direction and a wide side in the width direction. In this case, the side portion of the main body 3322 can be a long side or a wide side, and accordingly, the extension direction of the side portion is the length direction or the width direction of the main body 3322. In addition, the first positioning structure 3321 is eccentrically arranged, that is, the first positioning structure 3321 is located on one side of the median perpendicular line of the side portion. For example, the first positioning structure 3321 is a protrusion located on one side of the median perpendicular line of the side portion; the first positioning structure 3321 is an asymmetric structure, that is, the first positioning structure 3321 is asymmetric about the median perpendicular line of the side portion. For example, the first positioning structure 3321 is an asymmetric convex hull located on the outer edge of the side portion.

[0071] In combination with the explosion-proof valve 33 described above, the hole wall of the pressure relief hole 311 on the cover plate 31 has a first positioning groove 312, the fixing part 332 is limited in the pressure relief hole 311, and the first positioning structure 3321 included in the fixing part 332 is limited in the first positioning groove 312 to realize the assembly of the explosion-proof valve 33 in the pressure relief hole 311.

[0072] In some embodiments, as Figure 8 or Figure 9 As shown, the valve plate body 331 includes an annular portion 3311 and an opening portion 3312; the opening portion 3312 is connected to the inner side of the annular portion 3311, and the annular portion 3311 connects the fixed portion 332 and the opening portion 3312, the annular portion 3311 includes a connecting section 3313 and a bursting section 3314, and the bursting section 3314 can be disconnected when the pressure on one side of the valve plate body 331 is greater than the valve opening pressure.

[0073] In this way, by setting the connecting section 3313, the opening part 3312 is prevented from flying around when the blasting section 3314 is disconnected, thereby improving the safety of the explosion-proof valve 33; in addition, the annular part 3311 including the connecting section 3313 and the blasting section 3314 is set to simplify the structure of the valve plate body 331 and improve the manufacturing efficiency of the valve plate body 331.

[0074] The effective length of the bursting section 3314 can be ¾ of the effective length of the annular portion 3311. This ensures that when the bursting section 3314 is disconnected, the opening portion 3312 is integrally turned outward along the connecting section 3313, thereby ensuring a larger flow passage after the opening portion 3312 is opened, thereby improving pressure relief efficiency. Of course, the effective length of the bursting section 3314 can also be slightly greater than or slightly less than ¾ of the effective length of the annular portion 3311, as long as the overall outward turn of the opening portion 3312 is ensured while maintaining the stability of the connection between the opening portion 3312 and the fixing portion 332.

[0075] Alternatively, as Figure 8 or Figure 9 As shown, the main body 3322 includes a positioning section 3327 connected to the connecting section 3313, and the first positioning structure 3321 is connected to the positioning section 3327. This can increase the structural strength of the positioning section 3327 on the main body 3322, thereby ensuring the stability of the connection between the opening portion 3312 and the main body 3322, and prevent the connection between the fixing portion 332 and the cover plate 31 from loosening when the opening portion 3312 is opened, or even cause the fixing portion 332 to fall off the cover plate 31, thereby improving the safety of the explosion-proof valve 33.

[0076] As for the assembly of the explosion-proof valve 33 in the pressure relief hole 311, Figure 6 and Figure 8As shown, the connecting section 3313 and the positioning section 3327 of the electrode terminal 32 may be on the same side. In this way, when the blasting section 3314 is disconnected, the opening portion 3312 opens in a direction away from the electrode terminal 32, thereby avoiding contact between the opening portion 3312 and the electrode terminal 32, thereby avoiding a short circuit between the cover plate 31 and the electrode terminal 32, and improving the safety of the energy storage device 100.

[0077] In some embodiments, as Figure 8 or Figure 9 As shown, the first positioning structure 3321 is a positioning convex hump 3323 , the positioning convex hump 3323 is a non-isosceles triangle structure, and the positioning convex hump 3323 is connected to the outer edge of the main body 3322 .

[0078] The positioning bump 3323 can be a non-isosceles triangle or a non-isosceles trapezoid, as long as the positioning bump 3323 is asymmetrical. Accordingly, the first positioning groove 312 in the wall of the pressure relief hole 311 can be a non-isosceles triangle or a non-isosceles trapezoid, so as to ensure that the positioning bump 3323 is positioned within the first positioning groove 312.

[0079] Correspondingly, a first positioning groove 312 is provided on the wall of the pressure relief hole 311 on the cover plate 31. The contour of the first positioning groove 312 matches the contour of the positioning bump 3323, so that the positioning bump 3323 is retained within the first positioning groove 312. Specifically, a step may be formed on the wall of the pressure relief hole 311 (the tread of the step may face the electrode assembly 20), and the riser of the step may have a notch forming the first positioning groove 312. In this case, the main body 3322 of the explosion-proof valve 33 abuts against the tread of the step, and the positioning bump 3323 is retained within the first positioning groove 312 of the riser.

[0080] In this way, the first positioning structure 3321 formed by the positioning protrusion 3323 connected to the outer edge of the main body 3322 realizes the fool-proof assembly of the explosion-proof valve 33 in the pressure relief hole 311, while simplifying the structure of the fixing part 332 and the structure of the pressure relief hole 311 on the cover plate 31, thereby improving the manufacturing efficiency and assembly efficiency of the explosion-proof valve 33 and the cover plate 31.

[0081] In addition, for the positioning convex 3323 on the outer edge of the main body 3322, taking the main body 3322 having a long side and a wide side as an example, it can be as follows Figure 8 or Figure 9As shown, the positioning convex bump 3323 can be connected to the outer edge of the long side of the main body 3322, or the positioning convex bump 3323 can be connected to the outer edge of the wide side of the main body 3322. Furthermore, for the positioning convex bump 3323 connected to the long side or wide side of the main body 3322, when cutting the explosion-proof valve 33 on the template, the positioning convex bumps 3323 of two adjacent explosion-proof valves 33 can be closely adjacent and staggered, thereby reducing consumables and lowering the production cost of the explosion-proof valve 33. For example, Figure 10 As shown, the positioning convex bumps 3323 on the explosion-proof valve 33 are connected to the outer edge of the long side of the main body 3322, so that the positioning convex bumps 3323 of two adjacent explosion-proof valves 33 arranged in the width direction X of the main body 3322 are adjacent and staggered.

[0082] When the positioning protrusion 3323 is connected to the outer edge of the long side of the main body 3322 , it is convenient to reduce the size ratio of the explosion-proof valve 33 in the width direction X and the length direction Y, so as to realize the miniaturization of the explosion-proof valve 33 .

[0083] In addition, taking the positioning convex 3323 as a non-isosceles triangle structure as an example, the positioning convex 3323 has a tip 3324 facing away from the main body 3322. When the positioning convex 3323 is connected to the outer edge of the long side of the main body 3322, as shown in FIG. Figure 9 As shown, in the length direction Y, the distance L between the tip 3324 of the positioning protrusion 3323 and the outer edge of one wide side of the main body 3322 is greater than or equal to 1 / 6 of the length of the main body 3322 and less than or equal to 1 / 2 of the length of the main body 3322. For example, in the length direction Y, the distance between the tip 3324 and the outer edge of one wide side of the main body 3322 is 1 / 6, 1 / 5, 1 / 4, 1 / 3, 1 / 2, etc., of the length of the main body 3322.

[0084] When the positioning projection 3323 is connected to the outer edge of the wide side of the main body 3322, the distance between the tip 3324 of the positioning projection 3323 and the outer edge of one long side of the main body 3322 in the width direction X is greater than or equal to 1 / 5 of the width of the main body 3322 and less than or equal to 1 / 2 of the width of the main body 3322. For example, in the width direction X, the distance between the tip 3324 and the outer edge of one long side of the main body 3322 is 1 / 5, 1 / 4, 1 / 3, 1 / 2, etc., of the width of the main body 3322.

[0085] In other embodiments, Figure 11 and Figure 12 As shown, the first positioning structure 3321 is a positioning protrusion 3325 located on one side surface of the main body 3322 ; the positioning protrusion 3325 is eccentrically arranged in the extension direction of the side portion of the main body 3322 .

[0086] Correspondingly, the hole wall of the pressure relief hole 311 on the cover plate 31 has a step (the tread of the step can face the electrode assembly 20), and the tread of the step has a first positioning hole 313 corresponding to the positioning protrusion 3325. At this time, one side surface of the main body 3322 abuts against the tread of the step, and through the cooperation of the positioning protrusion 3325 and the first positioning hole 313, the fool-proof assembly of the explosion-proof valve 33 in the pressure relief hole 311 is realized.

[0087] In this way, by providing the positioning protrusion 3325 on the main body 3322 , it is convenient to realize fool-proof assembly of the explosion-proof valve 33 while improving the stability of the assembly of the explosion-proof valve 33 in the pressure relief hole 311 .

[0088] The positioning protrusion 3325 can be a convex prism or a convex pyramid. When the positioning protrusion 3325 is a convex pyramid, it is convenient to improve the assembly efficiency of the explosion-proof valve 33 in the pressure relief hole 311.

[0089] In some embodiments, as Figure 11 or Figure 12 As shown, in addition to the first positioning structure 3321, the fixing portion 332 may also include a second positioning structure 3326. The second positioning structure 3326 is located on the side of the main body 3322, and the minimum distances from the second positioning structure 3326 and the first positioning structure 3321 to the inner edge of the main body 3322 are different.

[0090] In this way, by setting the second positioning structure 3326 on the fixing portion 332 and setting the asymmetry of the first positioning structure 3321 and the second positioning structure 3326, the foolproof assembly of the explosion-proof valve 33 on the cover plate 31 is ensured, and the stability of the assembly of the explosion-proof valve 33 is further ensured.

[0091] Among them, the second positioning structure 3326 can specifically refer to the first positioning structure 3321 described above, and taking the second positioning structure 3326 as the positioning protrusion 3325 as an example, the hole wall of the pressure relief hole 311 on the cover plate 31 has a step, and the tread of the step has a second positioning hole 314 corresponding to the second positioning structure 3326. At this time, one side surface of the main body 3322 abuts on the tread of the step, and through the cooperation of the second positioning structure 3326 and the second positioning hole 314, the fool-proof assembly of the explosion-proof valve 33 in the pressure relief hole 311 is realized.

[0092] It should be noted that, for the second positioning structure 3326 provided on the main body 3322, combined with the above-mentioned main body 3322 being a rectangular ring structure or an elongated circular ring structure, the first positioning structure 3321 and the second positioning structure 3326 can be located on the same side portion of the main body 3322 (the side portion of the long side or the wide side), or can be located on different side portions of the main body 3322 (for example, one is located on the side portion of the long side, and the other is located on the side portion of the wide side).

[0093] The embodiment of the present application also provides an electric device 400, which can be a user energy storage cabinet, an energy storage container, etc. Figure 13 As shown, the electrical device 400 includes the energy storage device 100 described in the above embodiment, and the energy storage device 100 supplies power to the electrical device 400. Thus, combined with the above, the electrical device 400 of the present application can ensure the stability and safety of the electrical device 400 during use.

[0094] In the embodiments of the present application, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0095] In the description of the embodiments of the present application, it should be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the embodiments of the present application.

[0096] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the implementation methods of this application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0097] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An explosion-proof valve, characterized in that: include: The valve plate body (331) has an opening portion (3312), and the opening portion (3312) can be opened when the pressure on one side of the valve plate body (331) is greater than the valve opening pressure; The fixing portion (332) includes a main body portion (3322) and a first positioning structure (3321) provided on the main body portion (3322), wherein the main body portion (3322) is arranged around the periphery of the valve plate body (331) and is connected to the valve plate body (331); Wherein, the first positioning structure (3321) is located on the side portion of the main body (3322), and in the extension direction of the side portion, the first positioning structure (3321) is eccentrically arranged or is an asymmetric structure.

2. The explosion-proof valve according to claim 1, characterized in that: The first positioning structure (3321) is a positioning convex hull (3323), the positioning convex hull (3323) is a non-isosceles triangle structure, and the positioning convex hull (3323) is connected to the outer edge of the main body (3322).

3. The explosion-proof valve according to claim 2, characterized in that: The main body (3322) has a long side and a wide side, and the positioning protrusion (3323) is connected to the outer edge of the long side of the main body (3322).

4. The explosion-proof valve according to claim 2, characterized in that: The main body (3322) has a long side and a wide side, and the positioning protrusion (3323) is connected to the outer edge of the wide side of the main body (3322).

5. The explosion-proof valve according to claim 3, characterized in that: The positioning convex bump (3323) has a tip (3324) facing away from the main body (3322); The distance between the tip (3324) and the outer edge of a wide side of the main body (3322) is greater than or equal to 1 / 6 of the length of the main body (3322) and less than or equal to 1 / 2 of the length of the main body (3322).

6. The explosion-proof valve according to claim 5, characterized in that: The distance between the tip (3324) and the outer edge of a wide side of the main body (3322) is equal to 1 / 4 of the length of the main body (3322).

7. The explosion-proof valve according to claim 1, wherein: The first positioning structure (3321) is a positioning protrusion (3325) located on a side surface of the main body (3322); The positioning protrusion (3325) is eccentrically arranged in the extension direction of the side portion of the main body (3322).

8. The explosion-proof valve according to any one of claims 1 to 7, characterized in that: The fixing portion (332) further includes a second positioning structure (3326); The second positioning structure (3326) is located on the side of the main body (3322), and the minimum distances between the second positioning structure (3326) and the first positioning structure (3321) and the inner edge of the main body (3322) are different.

9. The explosion-proof valve according to any one of claims 1 to 7, characterized in that: The valve plate body (331) includes an annular portion (3311) and an opening portion (3312); The opening portion (3312) is connected to the inner side of the annular portion (3311), and the annular portion (3311) connects the fixed portion (332) and the opening portion (3312). The annular portion (3311) includes a connecting section (3313) and a bursting section (3314). The bursting section (3314) can be disconnected when the pressure on one side of the valve plate body (331) is greater than the valve opening pressure.

10. The explosion-proof valve according to claim 9, characterized in that: The main body (3322) includes a positioning segment (3327) connected to the connecting segment (3313), and the first positioning structure (3321) is connected to the positioning segment (3327).

11. An end cap assembly, characterized in that: include: A cover plate (31), the cover plate (31) having a pressure relief hole (311), and a hole wall of the pressure relief hole (311) having a first positioning groove (312); The explosion-proof valve (33) described in any one of claims 1 to 10, wherein the explosion-proof valve (33) is limited in the pressure relief hole (311), and the first positioning structure (3321) is limited in the first positioning groove (312).

12. An energy storage device, characterized in that: include: A housing (10) comprising a receiving cavity (11) having an opening; An electrode assembly (20) is accommodated in the accommodating cavity (11); The end cover assembly (30) according to claim 11, wherein the end cover assembly (30) seals the opening of the accommodating cavity (11).

13. An electrical device, characterized in that: The electrical device (400) comprises the energy storage device according to claim 12, and the energy storage device supplies power to the electrical device.

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