Explosion-proof valve assembly, cover assembly and battery

Abstract

This invention discloses an explosion-proof valve assembly, a cover plate assembly, and a battery, including a base component, a first explosion-proof valve, a second explosion-proof valve, an isolator, and a connecting bridge. Both the first and second explosion-proof valves are disposed on the base component. The isolator is disposed on the base component, and a cavity is defined between the isolator and the first explosion-proof valve to provide burst deformation space for the first explosion-proof valve. The isolator also isolates the first explosion-proof valve from the immersion liquid. The connecting bridge connects the first and second explosion-proof valves, and when the first explosion-proof valve bursts, the connecting bridge acts on the second explosion-proof valve to drive it to burst simultaneously. The explosion-proof valve assembly of this invention can prevent the explosion-proof valve from failing to open normally due to the hydraulic pressure of the immersion liquid, ensuring the stability of the explosion-proof valve's opening, thereby preventing the battery cell from disintegrating due to the explosion-proof valve's inability to open, and improving safety in use.

Description

Technical Field

[0001] This invention relates to the field of battery technology, specifically to an explosion-proof valve assembly, a cover plate assembly, and a battery. Background Technology

[0002] Immersion thermal management technology is a method that involves direct contact between the battery cell and the coolant, utilizing the circulation of the coolant to efficiently remove the heat generated by the battery. Because the circulating flow of the coolant creates efficient heat exchange and convection, it ensures good cooling efficiency.

[0003] However, in the existing technology, for some larger batteries, the bottom cells are completely submerged in the immersion liquid. The explosion-proof valve of the cell is subjected to a large hydraulic force. When the cell experiences thermal runaway, the pressure generated inside the cell is insufficient to open the explosion-proof valve, which will cause the cell to disintegrate directly, reducing the overall safety of use. Summary of the Invention

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

[0005] To address this, this invention provides an explosion-proof valve assembly that prevents the valve from failing to open due to the hydraulic pressure of the immersion fluid, ensuring the stability of the valve's opening and thus preventing the battery cell from disintegrating due to the valve's inability to open, thereby improving safety in use.

[0006] This invention also proposes a cover plate assembly including the above-described explosion-proof valve component.

[0007] This invention also proposes a battery including the above-described explosion-proof valve assembly or cover plate assembly.

[0008] The explosion-proof valve assembly of this invention includes:

[0009] Base components;

[0010] A first explosion-proof valve and a second explosion-proof valve, both of which are disposed on the base component;

[0011] An isolator is disposed on the base member, and a cavity is defined between the isolator and the first explosion-proof valve to provide a space for the first explosion-proof valve to burst and deform, and the isolator is used to isolate the first explosion-proof valve from the immersion liquid;

[0012] A connecting bridge is provided between the first explosion-proof valve and the second explosion-proof valve. 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 conjunction.

[0013] In some embodiments, the first explosion-proof valve includes a first explosion-proof disc, the second explosion-proof valve includes a second explosion-proof disc, and the bridge connects the first explosion-proof disc and the second explosion-proof disc.

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

[0015] In some embodiments, after blasting, the first explosion-proof sheet bends and deforms outward, and the second explosion-proof sheet bends and deforms inward.

[0016] In some embodiments, the breaking direction of the first explosion-proof sheet and the second explosion-proof sheet when they explode is along the direction from the second explosion-proof sheet to the first explosion-proof sheet.

[0017] In some embodiments, both the first explosion-proof sheet and the second explosion-proof sheet are angular structures, each angular structure including a vertex. The vertices of the first explosion-proof sheet and the second explosion-proof sheet have the same orientation, and the bridge connects the vertices of the first explosion-proof sheet and the second explosion-proof sheet.

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

[0019] In some embodiments, the spacer includes a protrusion that protrudes outward from the base and forms a cavity on the inner side of the spacer, the cavity forming a portion of the cavity;

[0020] And / or, including a dirt-proof sheet, said dirt-proof sheet being disposed on the outside of the base and arranged opposite to the second explosion-proof valve;

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

[0022] The cover plate assembly of this invention includes:

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

[0024] The plate body constitutes the base component, and the explosion-proof valve assembly is disposed on the plate body;

[0025] The electrode post is disposed on the plate.

[0026] The battery of this invention includes the explosion-proof valve assembly as described in any of the above embodiments, or 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 present invention can prevent the explosion-proof valve from failing to open normally due to the hydraulic action of the immersion liquid, ensuring the stability of the explosion-proof valve opening, thereby avoiding the situation where the battery cell disintegrates due to the explosion-proof valve failing to open, and improving the safety of use. Attached Figure Description

[0028] Figure 1 This is a half-sectional structural diagram of the explosion-proof valve assembly according to an embodiment of the present invention.

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

[0030] Figure 3 yes Figure 1 A magnified view of a portion of point A in the middle.

[0031] Figure 4 This is a perspective view of the cover plate assembly according to an embodiment of the present invention.

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

[0033] Figure label:

[0034] 10-Explosion-proof valve assembly;

[0035] 1-Base component; 11-First groove; 12-Second groove; 2-First explosion-proof valve; 21-First explosion-proof plate; 211-First apex; 3-Second explosion-proof valve; 31-Second explosion-proof plate; 311-Second apex; 4-Isolation component; 41-Protrusion; 411-Cavity; 5-Connecting bridge; 6-Cavity;

[0036] 20 - Plate; 30 - Polar column; 40 - Injection port; 50 - QR code;

[0037] 100 - Cover assembly; 200 - Housing. Detailed Implementation

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

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

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

[0041] Both the first explosion-proof valve 2 and the second explosion-proof valve 3 are located on the base component 1. For example, as... Figure 1 As shown, both the first explosion-proof valve 2 and the second explosion-proof valve 3 can be plate-shaped structures. At the first explosion-proof valve 2 and the second explosion-proof valve 3, the overall structural strength of the base component 1 is low. Therefore, when the pressure on one side of the base component 1 increases, the first explosion-proof valve 2 and the second explosion-proof valve 3 can open under the action of the changing pressure, thereby realizing the pressure relief on the side of the base component 1 with higher pressure.

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

[0043] For example, such as Figure 1 As shown, the isolating element 4 can be a cap-shaped structure. In other embodiments, the isolating element 4 can also be a sheet-like or disc-like structure. The isolating element 4 and the first explosion-proof valve 2 can be arranged at intervals in the thickness direction of the base element 1, wherein the thickness direction can specifically be... Figure 1 The isolation element 4 is positioned vertically and 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 component 1 can face the immersion liquid used to submerge the battery for fire fighting, while the lower side of the base component 1 can face the inner side of the battery. The isolation component 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 component 4, avoiding the situation where the immersion liquid directly acts on the first explosion-proof valve 2. This avoids the situation where the hydraulic pressure of the immersion liquid causes the first explosion-proof valve 2 to fail to open normally, thus eliminating the influence of hydraulic pressure on the first explosion-proof valve 2.

[0045] Secondly, the gap between the isolation element 4 and the first explosion-proof valve 2 can form a sealed cavity 6. When the first explosion-proof valve 2 bursts under changing pressure, the cavity 6 can be used to allow the deformed first explosion-proof valve 2 to extend into, thus providing 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. 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, such as Figure 1 and Figure 2As shown, the connecting bridge 5 can be a plate-shaped or strip-shaped structure. The first explosion-proof valve 2 and the second explosion-proof valve 3 can be arranged at intervals in the left and right directions. The first explosion-proof valve 2 can be located to the left of the second explosion-proof valve 3. The connecting bridge 5 can generally extend in the left and right directions. 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] Because the first explosion-proof valve 2 is equipped with an isolating component 4, the first explosion-proof valve 2 can be opened normally 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 linkage explosion of the first explosion-proof valve 2 and the second explosion-proof valve 3.

[0049] It should be noted that, since the first explosion-proof valve 2 is equipped with an isolating element 4, when the first explosion-proof valve 2 bursts, the pressure cannot be relieved from the first explosion-proof valve 2 because the isolating element 4 is still present. Only after the second explosion-proof valve 3 is opened in conjunction with the explosion can the pressure change on one side of the base 1 be relieved from the second explosion-proof valve 3.

[0050] The explosion-proof valve assembly 10 of this embodiment of the invention can avoid the situation where the explosion-proof valve cannot be opened normally due to the hydraulic action of the immersion liquid, ensuring the stability of the explosion-proof valve opening, thereby avoiding the situation where the battery cell disintegrates due to the explosion-proof valve failing to open, and 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 connecting bridge 5 connects the first explosion-proof disc 21 and the second explosion-proof disc 31.

[0052] For example, such as Figure 2 As shown, the first explosion-proof disc 21 can be a sheet-like structure and constitute part of the first explosion-proof valve 2. Some edge positions of the first explosion-proof disc 21 can be provided with weak structural features such as scratches and indentations. Under the action of these weak structural features, on the one hand, the structural strength of the outer periphery 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 guide the path of the explosion cracking of the first explosion-proof disc 21.

[0053] In some embodiments, the base 1 includes an outer side and an inner side arranged opposite to each other, the outer side being for facing the immersion liquid, the isolation member 4 being disposed on the outer side of the base 1, the cavity 6 being located on the outer side of the first explosion-proof valve 2, and the connecting bridge 5 being disposed on the inner side of the base 1.

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

[0055] Therefore, it can conceal the connecting bridge 5, preventing it from being exposed and thus preventing the first explosion-proof valve 2 or the second explosion-proof valve 3 from being opened due to accidental contact with the connecting bridge 5, thus ensuring the overall structural stability.

[0056] In some embodiments, after the explosion, the first explosion-proof plate 21 bends and deforms outward, and the second explosion-proof plate 31 bends and deforms inward. For example, since the connecting bridge 5 is arranged inside the base 1, when the pressure below the base 1 increases, the first explosion-proof plate 21 can bend and deform upward under the action of the pressure below. At this time, the connecting bridge 5 will move to the left under the deformation of the first explosion-proof plate 21, and the connecting bridge 5 will have the effect of pulling the second explosion-proof plate 31 downward, thereby pulling the second explosion-proof plate 31 downward to open it.

[0057] Therefore, while satisfying the requirement of linking and controlling the first explosion-proof disc 21 and the second explosion-proof disc 31 via the connecting bridge 5, the overall structural layout can be simplified. Secondly, it also ensures that the traction action of the connecting bridge 5 is compatible with the blasting action, thus guaranteeing the linked blasting effect.

[0058] In some embodiments, the breaking direction of the first explosion-proof disc 21 and the second explosion-proof disc 31 when they explode is along the direction from the second explosion-proof disc 31 to the first explosion-proof disc 21.

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

[0060] Therefore, the breaking direction of the first explosion-proof plate 21 and the second explosion-proof plate 31 can be kept consistent with the displacement direction of the connecting bridge 5, thereby ensuring the stability of the explosion opening of the first explosion-proof plate 21 and the second explosion-proof plate 31.

[0061] In some embodiments, the first explosion-proof plate 21 and the second explosion-proof plate 31 are both angular structures, each angular structure having a vertex. The vertices of the first explosion-proof plate 21 and the second explosion-proof plate 31 have the same orientation, and the bridge 5 connects the vertices of the first explosion-proof plate 21 and the second explosion-proof plate 31.

[0062] For example, such as Figure 2 As shown, both the first explosion-proof plate 21 and the second explosion-proof plate 31 are generally triangular, and their widths in the front-to-back direction gradually increase from right to left. The vertex of the first explosion-proof plate 21 can be located at its right end, and this vertex will be referred to as the first vertex 211 below. Similarly, the vertex of the second explosion-proof plate 31 can be located at its right end, and this vertex will be referred to as the second vertex 311 below.

[0063] like Figure 2 As shown, the first vertex 211 and the second vertex 311 are both arranged facing the right. In addition, during the explosion, the connecting bridge 5 will move to the left. This makes the gradual change in the width of the first explosion-proof plate 21 and the second explosion-proof plate 31 more convenient for the explosion cracking of the first explosion-proof plate 21 and the second explosion-proof plate 31, and improves the stability of the cracking.

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

[0065] For example, such as Figure 3 As shown, the base component 1 may be provided with stepped holes. The first groove 11 may be located on the lower side of the stepped hole and can be a stepped groove as a whole. The second groove 12 may be located on the upper side of the step and can 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 component 4 may be assembled in the corresponding second groove 12 as a whole.

[0066] Therefore, on the one hand, it can enhance the assembly and positioning effect of the first explosion-proof valve 2, the second explosion-proof valve 3, and the isolation component 4, and improve the structural stability of the assembly. On the other hand, it can also improve 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 component 1, avoiding the situation of easily occupying the internal space of the battery, avoiding interference with the installation of internal components of the battery, and also helping to improve the overall energy density of the battery.

[0067] In some embodiments, the spacer 4 includes a protrusion 41 that protrudes outward from the base 1 and forms a cavity 411 on the inner side of the spacer 4, the cavity 411 forming a partial cavity 6.

[0068] For example, such as Figure 1As shown, the isolator 4 can be a cap-shaped structure. The protrusion 41 can be integrally formed on the isolator 4, and the protrusion 41 can protrude upwards. The cavity 411 can be formed inside the protrusion 41 and located below the protrusion 41. The cavity 411 can form part of the 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 protrusion 41 can also enhance the structural strength of the isolator 4, thereby fully ensuring the pressure-bearing effect of the isolator 4.

[0069] In some embodiments, the explosion-proof valve assembly 10 includes a contaminant plate disposed on the outside of the base 1 and arranged opposite to the second explosion-proof valve 3. For example, as Figure 1 As shown, the outer side of the base 1 can be provided with two second grooves 12. The aforementioned isolation member 4 can be embedded in one of the second grooves 12, and the anti-fouling sheet can be embedded in the other second groove 12, thereby achieving the effect of isolating and protecting the second explosion-proof valve 3 and avoiding the influence of dirt on the second explosion-proof valve 3.

[0070] In some embodiments, the burst value of the first explosion-proof valve 2 is less than that of the second explosion-proof valve 3. That is, under the same pressure, the first explosion-proof valve 2 can burst before the second explosion-proof valve 3. This limits the bursting order of the first and second explosion-proof valves 2 and 3, ensuring stable linkage during bursting. Furthermore, it allows for a higher burst value of the second explosion-proof valve 3, preventing it from bursting under normal conditions due to the hydraulic pressure of the immersion fluid, thus ensuring the structural stability of the second explosion-proof valve 3 under normal conditions.

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

[0072] like Figure 4 As shown, the cover plate assembly 100 of this embodiment includes an explosion-proof valve assembly 10, a plate body 20, and a pole post 30. 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 specifically be a plain aluminum plate, and the plate body 20 can be generally a rectangular plate. The plate body 20 constitutes the base member 1, and the explosion-proof valve assembly 10 is disposed on the plate body 20.

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

[0074] In some embodiments, such as Figure 4As shown, the plate 20 can also be provided with a liquid injection hole 40. The liquid injection hole 40 can be located between the explosion-proof valve assembly 10 and the right pole post 30. Electrolyte can be injected into the battery through the liquid injection hole 40.

[0075] In some embodiments, such as Figure 4 As shown, a QR code 50 can also be set on the plate 20. The QR code 50 can be set in the middle of the outer side of the plate 20. Users can obtain production information such as the cover plate assembly 100 by scanning the QR code 50, which facilitates traceability.

[0076] The battery of an embodiment of the present invention is described below.

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

[0078] Specifically, the battery can be a lithium battery, such as... Figure 5 As shown, the battery may also include a housing 200, which may be generally square-shaped and have an open top. The cover assembly 100 may be installed on the top of the housing 200 and seal the opening at the top of the housing 200.

[0079] The following describes a specific example of a battery according to an embodiment of the present invention.

[0080] The battery of this embodiment includes a cover assembly 100 and a housing 200. The cover assembly 100 is mounted on top of the housing 200 and includes a plate 20 and an explosion-proof valve assembly 10. The battery of this embodiment is a single cell installed in a generally enclosed box, which can be filled with an immersion liquid, such as ethanol.

[0081] The explosion-proof valve assembly 10 includes two explosion-proof valves connected by an explosion-proof valve bridge 5. One of the explosion-proof valves is the first explosion-proof valve 2, and the other explosion-proof valve is the 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, thereby preventing 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 the same as a conventional explosion-proof valve. After opening, it can connect the inside and outside of the battery for pressure relief. The burst value of the second explosion-proof valve 3 needs to be appropriately increased to take into account the pressure of the immersion liquid to prevent the explosion-proof valve from bursting under normal conditions. The burst value of the first explosion-proof valve 2 is consistent with that of a conventional explosion-proof valve.

[0083] When the battery experiences thermal runaway, the high temperature and gas generated inside the casing will increase the internal pressure of the battery. At this time, the first explosion-proof valve 2 will burst first, and the explosion-proof plate on the first explosion-proof valve 2 will flip outward away from the second explosion-proof valve 3. The explosion-proof valve bridge 5 connected to the explosion-proof plate of the first explosion-proof valve 2 will pull the explosion-proof plate of the second explosion-proof valve 3 inward towards the inside of the battery, so that the second explosion-proof valve 3 can be opened smoothly to release pressure.

[0084] Beneficial effects: The battery of this embodiment of the invention, by setting two explosion-proof valves on the plate (battery cover) and 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, thus realizing the linkage opening of the two explosion-proof valves.

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

[0086] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0088] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0089] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0090] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0091] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. An explosion-proof valve assembly, characterized in that, include: Base components; A first explosion-proof valve and a second explosion-proof valve, both of which are disposed on the base component; An isolator is disposed on the base member, and a cavity is defined between the isolator and the first explosion-proof valve to provide a space for the first explosion-proof valve to burst and deform, and the isolator is used to isolate the first explosion-proof valve from the immersion liquid; A connecting bridge is provided between the first explosion-proof valve and the second explosion-proof valve. 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 conjunction. The base includes an outer side and an inner side arranged opposite to each other, the outer side being for facing the immersion liquid, the isolation member being disposed on the outer side of the base, and the connecting bridge being disposed on the inner side of the base; The burst value of the first explosion-proof valve is less than that of the second explosion-proof valve.

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 bridge connects 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 includes an outer side and an inner side arranged opposite to each other. The outer side is for facing the immersion liquid. The isolation member is disposed on the outer side of the base. The cavity is located on the outer side of the first explosion-proof valve. The connecting bridge is disposed on the inner side of the base.

4. The explosion-proof valve assembly according to claim 3, characterized in that, After the explosion, the first explosion-proof sheet bends and deforms outward, and the second explosion-proof sheet bends and deforms inward.

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

6. The explosion-proof valve assembly according to claim 5, characterized in that, Both the first explosion-proof sheet and the second explosion-proof sheet are angular structures, each angular structure including a vertex. The vertices of the first explosion-proof sheet and the second explosion-proof sheet have the same orientation, and the connecting bridge connects the vertices of the first explosion-proof sheet and the second explosion-proof sheet.

7. The explosion-proof valve assembly according to claim 3, characterized in that, The base component has two first grooves on its inner side, and the first explosion-proof valve and the second explosion-proof valve are respectively embedded in the two first grooves. The base component has a second groove on its outer side, and the isolation component is embedded in the second groove.

8. The explosion-proof valve assembly according to any one of claims 1-7, characterized in that, The spacer includes a protrusion that protrudes outward from the base and forms a cavity on the inner side of the spacer, the cavity forming part of the cavity; And / or, including a dirt-proof sheet, said dirt-proof sheet being disposed on the outside of the base and arranged opposite to 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 the explosion-proof valve assembly as described in any one of claims 1-8 above; The plate body constitutes the base component, and the explosion-proof valve assembly is disposed on the plate body; The electrode post is disposed on the plate.

10. A battery, characterized in that, It includes the explosion-proof valve assembly as described in any one of claims 1-8, or the cover plate assembly as described in claim 9.

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