Explosion-proof valve assembly, cover plate assembly and battery

Abstract

The invention discloses an explosion-proof valve assembly, a cover plate assembly and a battery, the explosion-proof valve assembly comprises a substrate, a first explosion-proof valve, a second explosion-proof valve, a separator and a connecting bridge, the first explosion-proof valve and the second explosion-proof valve are both arranged on the substrate; the isolation piece is arranged on the base piece, a cavity for providing blasting deformation space for the first anti-explosion valve is limited between the isolation piece and the first anti-explosion valve, and the isolation piece is used for isolating the first anti-explosion valve from immersion liquid; the connecting bridge is connected between the first anti-explosion valve and the second anti-explosion valve, and when the first anti-explosion valve explodes, the connecting bridge acts on the second anti-explosion valve to drive the second anti-explosion valve to explode in a linkage mode. According to the explosion-proof valve assembly, the situation that the explosion-proof valve cannot be normally opened due to the hydraulic action of the immersion liquid can be avoided, the opening stability of the explosion-proof valve is guaranteed, then the situation that the battery cell is disassembled due to the fact that the explosion-proof valve cannot be opened is avoided, and the use safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to an explosion-proof valve component, a cover plate assembly and a battery. Background Art

[0002] Immersion thermal management technology is a management method that directly contacts the battery cell with the coolant and uses the circulation of the coolant to efficiently remove the heat generated by the battery. Since the circulation of the coolant can form efficient heat exchange and convection, it can ensure good cooling efficiency.

[0003] However, in the prior art, for some batteries with larger sizes, the battery cells at the bottom are completely immersed in the immersion liquid, and the explosion-proof valves of the battery cells will be subjected to greater hydraulic pressure. When the battery cells thermally run away, the pressure generated inside the battery cells is not enough to open the explosion-proof valves, which will cause the battery cells to disintegrate directly, reducing the overall safety of use. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes an explosion-proof valve assembly, which can avoid the situation where the explosion-proof valve cannot be opened normally due to the hydraulic effect of the immersion liquid, ensure the stability of the opening of the explosion-proof valve, and further avoid the disintegration of the battery cell due to the failure to open the explosion-proof valve, thereby improving the safety of use.

[0006] The embodiment of the present invention further provides a cover plate assembly including the explosion-proof valve assembly.

[0007] An embodiment of the present invention further provides a battery including the explosion-proof valve assembly or the cover plate assembly.

[0008] The explosion-proof valve assembly of the embodiment of the present invention comprises:

[0009] Base parts;

[0010] a first explosion-proof valve and a second explosion-proof valve, wherein the first explosion-proof valve and the second explosion-proof valve are both arranged on the base member;

[0011] An isolation member, the isolation member is arranged on the base member, a cavity is limited between the isolation member and the first explosion-proof valve to provide an explosion-proof deformation space for the first explosion-proof valve, and the isolation member is used to isolate the first explosion-proof valve from the immersion liquid;

[0012] A connecting bridge is connected between the first explosion-proof valve and the second explosion-proof valve, and when the first explosion-proof valve explodes, the connecting bridge acts on the second explosion-proof valve to drive the second explosion-proof valve to explode in linkage.

[0013] In some embodiments, the first explosion-proof valve includes a first explosion-proof disk, the second explosion-proof valve includes a second explosion-proof disk, and the bridge is connected between the first explosion-proof disk and the second explosion-proof disk.

[0014] In some embodiments, the base member includes an outer side and an inner side arranged opposite to each other, the outer side is used to face the immersion liquid, the isolation member is arranged on the outer side of the base member, the cavity is located on the outer side of the first explosion-proof valve, and the bridge is arranged on the inner side of the base member.

[0015] In some embodiments, after explosion, the first bursting plate is bent and deformed toward the outer side, and the second bursting plate is bent and deformed toward the inner side.

[0016] In some embodiments, the bursting directions of the first bursting disc and the second bursting disc when bursting are both along the direction from the second bursting disc to the first bursting disc.

[0017] In some embodiments, the first explosion-proof piece and the second explosion-proof piece are both angular structures, the angular structures include vertices, the vertices of the first explosion-proof piece and the vertices of the second explosion-proof piece are oriented in the same direction, and the bridge is connected between the vertices of the first explosion-proof piece and the vertices of the second explosion-proof piece.

[0018] In some embodiments, two first grooves are provided on the inner side of the base member, the first explosion-proof valve and the second explosion-proof valve are respectively embedded in the two first grooves, and a second groove is provided on the outer side of the base member, and the isolation member is embedded in the second groove.

[0019] In some embodiments, the isolation member includes a convex portion, the convex portion protrudes toward the outside of the base member and forms a concave cavity inside the isolation member, and the concave cavity forms part of the cavity;

[0020] and / or, comprising an anti-fouling sheet, the anti-fouling sheet being arranged on the outer side of the base member and being arranged opposite to the second explosion-proof valve;

[0021] And / or, the explosion value of the first explosion-proof valve is smaller than the explosion value of the second explosion-proof valve.

[0022] The cover plate assembly of the embodiment of the present invention comprises:

[0023] An explosion-proof valve assembly, wherein the explosion-proof valve assembly is an explosion-proof valve assembly as described in any of the above embodiments;

[0024] A plate body, the plate body constituting the base member, the explosion-proof valve assembly being arranged on the plate body;

[0025] A pole is arranged on the plate body.

[0026] The battery according to the embodiment of the present invention includes the explosion-proof valve assembly as described in any of the above embodiments, or includes the cover plate assembly as described in any of the above embodiments.

[0027] Beneficial effects: The explosion-proof valve assembly, cover plate assembly and battery of the embodiments of the present invention can prevent the explosion-proof valve from being unable to open normally due to the hydraulic effect of the immersion liquid, ensure the stability of the opening of the explosion-proof valve, and further avoid the disintegration of the battery cell due to the failure to open the explosion-proof valve, thereby improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of a half-section structure of an explosion-proof valve assembly according to an embodiment of the present invention.

[0029] Figure 2 1 is a bottom view schematic diagram of an explosion-proof valve assembly according to an embodiment of the present invention.

[0030] Figure 3 yes Figure 1 A local enlarged schematic diagram of point A in the middle.

[0031] Figure 4 4 is a three-dimensional schematic diagram of a cover plate assembly according to an embodiment of the present invention.

[0032] Figure 5 4 is a three-dimensional schematic diagram of a battery according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] 10- Explosion-proof valve assembly;

[0035] 1-base member; 11-first groove; 12-second groove; 2-first explosion-proof valve; 21-first explosion-proof disk; 211-first vertex; 3-second explosion-proof valve; 31-second explosion-proof disk; 311-second vertex; 4-isolator; 41-convex portion; 411-concave cavity; 5-bridge; 6-cavity;

[0036] 20-plate body; 30-pole; 40-liquid injection hole; 50-QR code;

[0037] 100-cover assembly; 200-housing. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0039] like Figure 1 As shown, the explosion-proof valve assembly 10 according to the embodiment of the present invention includes a base member 1 , a first explosion-proof valve 2 , a second explosion-proof valve 3 , an isolation member 4 and a connecting bridge 5 .

[0040] The base member 1 may be a plate-like structure, and specifically may be a shell wall, a cover plate, or other components of a battery. The base member 1 may provide an installation foundation for the installation of the first explosion-proof valve 2, the second explosion-proof valve 3, and other components.

[0041] The first explosion-proof valve 2 and the second explosion-proof valve 3 are both arranged on the base member 1. Figure 1 As shown, the first explosion-proof valve 2 and the second explosion-proof valve 3 can both be sheet-like structures. At the first explosion-proof valve 2 and the second explosion-proof valve 3, the overall structural strength of the base member 1 is relatively low. Therefore, when the pressure on one side of the base member 1 increases, the first explosion-proof valve 2 and the second explosion-proof valve 3 can be opened under the action of the changing pressure, thereby achieving pressure relief on the side of the base member 1 with a higher pressure.

[0042] The isolation member 4 is arranged on the base member 1 , and a cavity 6 is defined between the isolation member 4 and the first explosion-proof valve 2 to provide an explosion and deformation space for the first explosion-proof valve 2 , and the isolation member 4 is used to isolate the first explosion-proof valve 2 from the immersion liquid.

[0043] For example, Figure 1 As shown, the isolating member 4 can be a cap-shaped structure as a whole. In some other embodiments, the isolating member 4 can also be a sheet-shaped, disc-shaped structure. The isolating member 4 and the first explosion-proof valve 2 can be arranged at intervals in the thickness direction of the base member 1, wherein the thickness direction can be specifically Figure 1 In the up and down direction, the isolation piece 4 as a whole can be located directly above the first explosion-proof valve 2.

[0044] It should be noted that, in actual use, the upper side of the base member 1 can face the immersion liquid used to immerse the battery for fire protection, and the lower side of the base member 1 can be the inner side of the battery. The setting of the isolation member 4 can isolate the first explosion-proof valve 2 from the immersion liquid, so that the hydraulic pressure of the immersion liquid only acts on the isolation member 4, avoiding the situation where the immersion liquid directly acts on the first explosion-proof valve 2, thereby avoiding the situation where the first explosion-proof valve 2 cannot be opened normally due to the hydraulic pressure of the immersion liquid, and eliminating the influence of the hydraulic pressure on the first explosion-proof valve 2.

[0045] Secondly, the interval between the isolation piece 4 and the first explosion-proof valve 2 can form a sealed cavity 6. When the first explosion-proof valve 2 explodes under the action of changing pressure, the cavity 6 can be used for the deformed first explosion-proof valve 2 to extend into, thereby also providing a deformation space for the deformation of the first explosion-proof valve 2.

[0046] The connecting bridge 5 is connected between the first explosion-proof valve 2 and the second explosion-proof valve 3 , and when the first explosion-proof valve 2 explodes, the connecting bridge 5 acts on the second explosion-proof valve 3 to drive the second explosion-proof valve 3 to explode in conjunction.

[0047] For example, Figure 1 and Figure 2As shown, the connecting bridge 5 can be a plate-shaped or strip-shaped structure, and the first explosion-proof valve 2 and the second explosion-proof valve 3 can be arranged at intervals in the left-right direction, wherein the first explosion-proof valve 2 can be located on the left side of the second explosion-proof valve 3, and the connecting bridge 5 can generally extend along the left-right direction, wherein the left end of the connecting bridge 5 can be connected to the first explosion-proof valve 2, and the right end of the connecting bridge 5 can be connected to the second explosion-proof valve 3.

[0048] Since the first explosion-proof valve 2 is provided with an isolation member 4, the first explosion-proof valve 2 can be normally exploded open under the action of changing pressure. At this time, the deformation of the first explosion-proof valve 2 will pull the second explosion-proof valve 3 through the connecting bridge 5, thereby realizing the traction-linked explosion of the first explosion-proof valve 2 and the second explosion-proof valve 3.

[0049] It should be noted that, since the isolation piece 4 is provided at the first explosion-proof valve 2, when the first explosion-proof valve 2 explodes, pressure relief cannot be achieved from the first explosion-proof valve 2 because the isolation piece 4 still exists. Only after the second explosion-proof valve 3 is linked to the explosion and opened, the changing pressure on one side of the base member 1 can be relieved from the second explosion-proof valve 3.

[0050] The explosion-proof valve assembly 10 of the embodiment of the present invention can avoid the situation where the explosion-proof valve cannot be opened normally due to the hydraulic effect of the immersion liquid, ensure the stability of the opening of the explosion-proof valve, and further avoid the disintegration of the battery cell due to the failure of the explosion-proof valve to open, thereby improving the safety of use.

[0051] In some embodiments, the first explosion-proof valve 2 includes a first explosion-proof disc 21 , the second explosion-proof valve 3 includes a second explosion-proof disc 31 , and the bridge 5 is connected between the first explosion-proof disc 21 and the second explosion-proof disc 31 .

[0052] For example, Figure 2 As shown, the first explosion-proof disc 21 may be a sheet-like structure and constitute a part of the first explosion-proof valve 2. Some edge positions of the first explosion-proof disc 21 may be provided with weak structural features such as notches and indentations. Under the action of these weak structural features, on the one hand, the structural strength of the outer peripheral contour of the first explosion-proof disc 21 can be weakened, thereby facilitating the explosion deformation and opening of the first explosion-proof disc 21 under the action of changing pressure. On the other hand, it can also play an effect of guiding the explosion and cracking path of the first explosion-proof disc 21.

[0053] In some embodiments, the base 1 includes an outer side and an inner side arranged relatively to each other, the outer side is used to face the immersion liquid, the isolation member 4 is arranged on the outer side of the base 1, the cavity 6 is located on the outer side of the first explosion-proof valve 2, and the bridge 5 is arranged on the inner side of the base 1.

[0054] For example, Figure 1As shown, the outer side can be the upper side of the base member 1, the inner side can be the lower side of the base member 1, the outer side of the base member 1 can directly face the immersion liquid and contact with the immersion liquid, the above-mentioned isolation member 4 can be sealed and installed on the upper side of the base member 1, and the above-mentioned cavity 6 can be located on the upper side of the first explosion-proof valve 2, and the bridge 5 can be assembled on the lower side of the base member 1.

[0055] Thereby, the connecting bridge 5 can be shielded and hidden, thereby preventing the connecting bridge 5 from being exposed, and further preventing the connecting bridge 5 from being accidentally touched, thereby preventing the first explosion-proof valve 2 or the second explosion-proof valve 3 from being opened, thereby ensuring the overall structural stability.

[0056] In some embodiments, after the explosion, the first explosion-proof piece 21 bends and deforms outward, and the second explosion-proof piece 31 bends and deforms inward. For example, since the connecting bridge 5 is arranged on the inner side of the base member 1, when the pressure below the base member 1 increases, the first explosion-proof piece 21 can be blasted and bent upward under the pressure below. At this time, the connecting bridge 5 will move to the left under the deformation of the first explosion-proof piece 21, and the connecting bridge 5 will have the effect of pulling the second explosion-proof piece 31 downward, so that the second explosion-proof piece 31 can be pulled downward to open.

[0057] Thus, the overall structural arrangement can be simplified while satisfying the requirement of controlling the linkage of the first explosion-proof disk 21 and the second explosion-proof disk 31 through the connecting bridge 5. Secondly, the pulling action of the connecting bridge 5 can be consistent with the blasting action, thereby ensuring the linkage blasting effect.

[0058] In some embodiments, the bursting directions of the first bursting disc 21 and the second bursting disc 31 when they burst are both along the direction from the second bursting disc 31 to the first bursting disc 21 .

[0059] For example, Figure 2 As shown, the breaking direction of the first explosion-proof plate 21 and the second explosion-proof plate 31 can be from right to left, that is, during explosion, the right side of the first explosion-proof plate 21 and the second explosion-proof plate 31 will first crack, and then the first explosion-proof plate 21 and the second explosion-proof plate 31 will bend and deform to the left. After the first explosion-proof plate 21 and the second explosion-proof plate 31 explode, the left side of the first explosion-proof plate 21 and the left side of the second explosion-proof plate 31 are still connected to the base member 1.

[0060] Thus, the rupture directions of the first explosion-proof disc 21 and the second explosion-proof disc 31 can be kept consistent with the displacement direction of the connecting bridge 5, thereby ensuring the stability of the first explosion-proof disc 21 and the second explosion-proof disc 31 when being blasted open.

[0061] In some embodiments, the first explosion-proof piece 21 and the second explosion-proof piece 31 are both angular structures, the angular structures include vertices, the vertices of the first explosion-proof piece 21 and the vertices of the second explosion-proof piece 31 are oriented in the same direction, and the bridge 5 is connected between the vertices of the first explosion-proof piece 21 and the second explosion-proof piece 31.

[0062] For example, Figure 2 As shown, the first explosion-proof disc 21 and the second explosion-proof disc 31 can be substantially triangular, and the width of the first explosion-proof disc 21 and the second explosion-proof disc 31 in the front-to-back direction gradually increases from right to left. The vertex of the first explosion-proof disc 21 can be located at the right end of the first explosion-proof disc 21, and the vertex is hereinafter referred to as the first vertex 211, and the vertex of the second explosion-proof disc 31 can be located at the right end of the second explosion-proof disc 31, and the vertex is hereinafter referred to as the second vertex 311.

[0063] like Figure 2 As shown, the first vertex 211 and the second vertex 311 are both arranged toward the right side, and during explosion, the bridge 5 will generally move to the left, so that the gradual change design of the width dimensions of the first explosion-proof disc 21 and the second explosion-proof disc 31 facilitates the blasting cracking of the first explosion-proof disc 21 and the second explosion-proof disc 31 and improves the stability of the cracking.

[0064] In some embodiments, two first grooves 11 are provided on the inner side of the base member 1, and the first explosion-proof valve 2 and the second explosion-proof valve 3 are respectively embedded in the two first grooves 11; a second groove 12 is provided on the outer side of the base member 1, and the isolation member 4 is embedded in the second groove 12.

[0065] For example, Figure 3 As shown, the base member 1 may be provided with a stepped hole, the first groove 11 may be located at the lower side of the stepped hole and may be a stepped groove as a whole, and the second groove 12 may be located at the upper side of the step and may be a stepped groove as a whole. The first explosion-proof valve 2 and the second explosion-proof valve 3 may be respectively assembled in the corresponding first groove 11, and the isolation member 4 may be assembled in the corresponding second groove 12 as a whole.

[0066] Therefore, on the one hand, the assembly positioning effect of the first explosion-proof valve 2, the second explosion-proof valve 3, and the isolation member 4 can be enhanced, thereby improving the structural stability of the assembly; on the other hand, the flatness of the lower surface of the first explosion-proof valve 2, the lower surface of the second explosion-proof valve 3, and the lower surface of the base member 1 can be improved, thereby avoiding the situation where the internal space of the battery is easily occupied, avoiding interference with the installation of components inside the battery, and is also beneficial to improving the overall energy density of the battery.

[0067] In some embodiments, the isolation member 4 includes a convex portion 41 , which protrudes toward the outside of the base member 1 and forms a concave cavity 411 on the inner side of the isolation member 4 , and the concave cavity 411 forms a portion of the cavity 6 .

[0068] For example, Figure 1As shown, the isolating member 4 as a whole can be a cap-shaped structure, the convex portion 41 can be integrally formed on the isolating member 4, and the convex portion 41 as a whole can protrude upward, the concave cavity 411 can be formed in the convex portion 41 and located below the convex portion 41, and the concave cavity 411 can constitute a part of the above-mentioned cavity 6, thereby increasing the volume of the cavity 6 and providing sufficient deformation space for the opening of the first explosion-proof valve 2. Secondly, the setting of the convex portion 41 can also enhance the structural strength of the isolating member 4, thereby fully ensuring the pressure-bearing effect of the isolating member 4.

[0069] In some embodiments, the explosion-proof valve assembly 10 includes an anti-fouling sheet, which is arranged on the outside of the base member 1 and opposite to the second explosion-proof valve 3. Figure 1 As shown, two second grooves 12 can be provided on the outer side of the base member 1, the above-mentioned isolation member 4 can be embedded in one second groove 12, and the anti-fouling sheet can be embedded in another second groove 12, so as to isolate and protect the second explosion-proof valve 3 and avoid the influence of stains on the second explosion-proof valve 3.

[0070] In some embodiments, the bursting value of the first explosion-proof valve 2 is less than the bursting value of the second explosion-proof valve 3. That is, under the action of the same pressure, it is ensured that the first explosion-proof valve 2 can be burst before the second explosion-proof valve 3. Therefore, on the one hand, the order of the bursting of the first explosion-proof valve 2 and the second explosion-proof valve 3 is limited, ensuring the stable progress of the linkage bursting, and on the other hand, the bursting value of the second explosion-proof valve 3 can be increased, thereby avoiding the situation where the hydraulic action of the immersion liquid causes the second explosion-proof valve 3 to be burst in a normal state, ensuring the structural stability of the second explosion-proof valve 3 in a normal state.

[0071] The cover plate assembly 100 according to the embodiment of the present invention is described below.

[0072] like Figure 4 As shown, the cover plate assembly 100 of the embodiment of the present invention includes an explosion-proof valve assembly 10, a plate body 20 and a pole 30, wherein the explosion-proof valve assembly 10 can be the explosion-proof valve assembly 10 described in any of the above embodiments. The plate body 20 can be a plain aluminum plate, which can be a rectangular plate, and the plate body 20 constitutes the base member 1, and the above-mentioned explosion-proof valve assembly 10 is arranged on the plate body 20.

[0073] The pole 30 is disposed on the plate 20. For example, Figure 4 As shown, there can be two poles 30, and the two poles 30 can be arranged at intervals in the left and right directions, and the explosion-proof valve assembly 10 can be arranged between the two poles 30. Each pole 30 is equipped with a base, which can be assembled on the inner side of the plate body 20 and connected and fixed to the pole 30.

[0074] In some embodiments, Figure 4As shown, a liquid injection hole 40 may be further provided on the plate body 20 . The liquid injection hole 40 may be between the explosion-proof valve assembly 10 and the pole 30 on the right side. Electrolyte etc. may be injected into the battery through the liquid injection hole 40 .

[0075] In some embodiments, Figure 4 As shown, a QR code 50 may also be provided on the plate body 20. The QR code 50 may be provided in the middle of the outer side of the plate body 20. By scanning the QR code 50, the user may obtain production information of the cover assembly 100, etc., thereby facilitating traceability inquiries.

[0076] Next, a battery according to an embodiment of the present invention will be described.

[0077] The battery of the embodiment of the present invention includes an explosion-proof valve assembly, which may be the explosion-proof valve assembly 10 as described in any of the above embodiments. In other embodiments, the battery may also include a cover assembly, which may be the cover assembly 100 as described in any of the above embodiments.

[0078] The battery can be a lithium battery, such as Figure 5 As shown, the battery may further include a shell 200 , etc. The shell 200 may be generally square-shell-shaped, and the top of the shell 200 may be open. The cover assembly 100 may be installed on the top of the shell 200 and seal the opening on the top of the shell 200 .

[0079] A specific example of a battery according to an embodiment of the present invention is described below.

[0080] The battery of the embodiment of the present invention comprises a cover plate assembly 100 and a housing 200. The cover plate assembly 100 is mounted on the top of the housing 200. The cover plate assembly 100 comprises a plate body 20 and an explosion-proof valve assembly 10. The battery of the embodiment of the present invention is a single cell and is mounted in a large box. The box can be filled with an immersion liquid, which can be ethanol or the like.

[0081] The explosion-proof valve assembly 10 includes two explosion-proof valves, which are connected via an explosion-proof valve bridge 5 , one of which is a first explosion-proof valve 2 , and the other is a second explosion-proof valve 3 .

[0082] A sealed cavity 6 is provided on the first explosion-proof valve 2 as the first explosion-proof valve 2 cavity 6, so as to prevent the pressure formed by the external immersion liquid from directly acting on the first explosion-proof valve 2. The second explosion-proof valve 3 is consistent with the conventional explosion-proof valve and can be connected to the inside and outside of the battery for pressure relief after opening the valve, and the bursting value of the second explosion-proof valve 3 needs to take into account the pressure of the immersion liquid to increase appropriately to prevent the pressure of the immersion liquid from causing the explosion-proof valve to be exploded under normal conditions, while the bursting value of the first explosion-proof valve 2 is consistent with the conventional explosion-proof valve.

[0083] When the battery is in thermal runaway, the high temperature and gas generated in the shell will increase the internal pressure of the battery. At this time, the first explosion-proof valve 2 will explode first, and the explosion-proof disk on the first explosion-proof valve 2 will turn outward away from the second explosion-proof valve 3. The explosion-proof valve bridge 5 connected to the explosion-proof disk of the first explosion-proof valve 2 will pull the explosion-proof disk of the second explosion-proof valve 3 to turn inward toward the inside of the battery, so that the second explosion-proof valve 3 can be smoothly opened to release pressure.

[0084] Beneficial effect: The battery of the embodiment of the present invention, by arranging double explosion-proof valves on the plate body (battery cover), and then mechanically connecting them through the explosion-proof valve bridge, can simultaneously pull the second explosion-proof valve to open when the first explosion-proof valve is opened, thereby realizing the linkage opening of the two explosion-proof valves.

[0085] Secondly, the explosion value of the first explosion-proof valve is consistent with that of the conventional explosion-proof valve, and the first explosion-proof valve is equipped with an anti-immersion liquid cavity, which ensures that the first explosion-proof valve can be opened and exploded normally, so that the explosion-proof valve assembly can be adapted to existing conventional battery types, ensuring the compatibility of the explosion-proof valve assembly with existing batteries.

[0086] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0087] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0088] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0090] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. An explosion-proof valve assembly, characterized in that: include: Base parts; a first explosion-proof valve and a second explosion-proof valve, wherein the first explosion-proof valve and the second explosion-proof valve are both arranged on the base member; An isolation member, the isolation member is arranged on the base member, a cavity is limited between the isolation member and the first explosion-proof valve to provide an explosion-proof deformation space for the first explosion-proof valve, and the isolation member is used to isolate the first explosion-proof valve from the immersion liquid; A connecting bridge is connected between the first explosion-proof valve and the second explosion-proof valve, and when the first explosion-proof valve explodes, the connecting bridge acts on the second explosion-proof valve to drive the second explosion-proof valve to explode in linkage.

2. The explosion-proof valve assembly according to claim 1, characterized in that: The first explosion-proof valve includes a first explosion-proof disc, the second explosion-proof valve includes a second explosion-proof disc, and the connecting bridge is connected between the first explosion-proof disc and the second explosion-proof disc.

3. The explosion-proof valve assembly according to claim 2, characterized in that: The base member includes an outer side and an inner side which are arranged opposite to each other, the outer side is used to face the immersion liquid, the isolation member is arranged on the outer side of the base member, the cavity is located on the outer side of the first explosion-proof valve, and the bridge is arranged on the inner side of the base member.

4. The explosion-proof valve assembly according to claim 3, characterized in that: After the explosion, the first explosion-proof sheet is bent and deformed toward the outer side, and the second explosion-proof sheet is bent and deformed toward the inner side.

5. The explosion-proof valve assembly according to claim 3, characterized in that: The bursting directions of the first bursting disc and the second bursting disc when bursting are both along the direction from the second bursting disc to the first bursting disc.

6. The explosion-proof valve assembly according to claim 5, characterized in that: The first explosion-proof sheet and the second explosion-proof sheet are both angular structures, the angular structures include vertices, the vertices of the first explosion-proof sheet and the vertices of the second explosion-proof sheet are oriented in the same direction, and the bridge is connected between the vertices of the first explosion-proof sheet and the vertices of the second explosion-proof sheet.

7. The explosion-proof valve assembly according to claim 3, characterized in that: Two first grooves are arranged on the inner side of the base member, and the first explosion-proof valve and the second explosion-proof valve are respectively embedded in the two first grooves. A second groove is arranged on the outer side of the base member, and the isolation member is embedded in the second groove.

8. The explosion-proof valve assembly according to any one of claims 1 to 7, characterized in that: The isolating member includes a convex portion, the convex portion protrudes toward the outside of the base member and forms a concave cavity inside the isolating member, and the concave cavity forms part of the cavity; and / or, comprising an anti-fouling sheet, the anti-fouling sheet being arranged on the outer side of the base member and arranged opposite to the second explosion-proof valve; And / or, the explosion value of the first explosion-proof valve is smaller than the explosion value of the second explosion-proof valve.

9. A cover plate assembly, characterized in that: include: An explosion-proof valve assembly, wherein the explosion-proof valve assembly is an explosion-proof valve assembly as described in any one of claims 1 to 8; A plate body, the plate body constituting the base member, the explosion-proof valve assembly being arranged on the plate body; A pole is arranged on the plate body.

10. A battery, characterized in that: The invention comprises an explosion-proof valve assembly as described in any one of claims 1 to 8, or comprises a cover plate assembly as described in claim 9.

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