Cover plate assembly, battery cell, battery device, and vehicle

Abstract

The application discloses a cover plate assembly, a battery monomer, a battery device and a vehicle, and belongs to the battery field.The cover plate assembly comprises a cover plate body and an explosion-proof valve assembly.The cover plate body forms an exhaust hole and a liquid injection hole.The explosion-proof valve assembly comprises an explosion-proof valve and a sealing pin connected with each other.The explosion-proof valve is connected with the cover plate body and seals the exhaust hole.The sealing pin seals the liquid injection hole.The orthographic projection of the exhaust hole on the cover plate body and the orthographic projection of the liquid injection hole on the cover plate body are located in the orthographic projection of the explosion-proof valve on the cover plate body.The application can reasonably utilize the space on the cover plate body, simplify the production process and improve the liquid injection efficiency.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and in particular relates to a cover plate assembly, a battery cell, a battery device, and a vehicle. Background Technology

[0002] In related technologies, the cover plate of a battery cell typically has an injection hole and an explosion-proof valve mounting hole. Before injection, the cover plate must be welded to the explosion-proof valve, and after injection, a sealing pin is inserted into the injection hole for sealing. This structural design is unreasonable and needs to be improved. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a cover plate assembly, a battery cell, a battery device, and a vehicle, which can make reasonable use of the space on the cover plate body, simplify the production process, and improve the liquid injection efficiency.

[0004] In a first aspect, this application provides a cover plate assembly, including: a cover plate body and an explosion-proof valve assembly.

[0005] The cover plate body forms an exhaust port and an injection port;

[0006] The explosion-proof valve assembly includes an explosion-proof valve and a sealing pin connected together. The explosion-proof valve is connected to the cover plate body and seals the vent hole. The sealing pin seals the injection hole. The orthographic projection of the vent hole on the cover plate body and the orthographic projection of the injection hole on the cover plate body are located within the orthographic projection of the explosion-proof valve on the cover plate body.

[0007] According to the cover plate assembly of this application, the positions of the vent hole and the injection hole on the cover plate body coincide with the position of the explosion-proof valve on the cover plate body, and the explosion-proof valve and the sealing pin are connected. After the injection is completed, the explosion-proof valve and the cover plate body can be connected by welding or other means, thereby achieving simultaneous sealing of the vent hole and the injection hole. Compared with the related technology, which requires separate sealing welding and sealing testing of the vent hole and the injection hole, this application omits the welding process of sealing the connection between the sealing pin and the injection hole and the sealing test step, simplifying the production process and improving production efficiency. At the same time, the vent hole of this application can discharge the gas inside the battery cell during injection, improving the injection efficiency.

[0008] According to one embodiment of this application, the sealing nail includes a connecting portion and a sealing portion, the connecting portion being connected to the explosion-proof valve, and the sealing portion being sleeved on the outside of the connecting portion.

[0009] According to one embodiment of this application, a first snap-fit ​​member is provided on one of the outer wall of the connecting portion and the inner wall of the sealing portion, and a second snap-fit ​​member is provided on the other of the outer wall of the connecting portion and the inner wall of the sealing portion, and the first snap-fit ​​member and the second snap-fit ​​member snap-fit ​​together.

[0010] According to one embodiment of this application, the outer diameter of the end of the sealing pin facing the cover plate body is smaller than the outer diameter of the end of the sealing pin away from the cover plate body.

[0011] According to one embodiment of this application, the cover plate body is provided with an installation groove, the bottom of the installation groove is provided with the vent hole and the liquid injection hole, and at least a portion of the explosion-proof valve is located in the installation groove and connected to the groove wall of the installation groove.

[0012] According to one embodiment of this application, the bottom of the mounting groove includes a first part and a second part. The first part is located outside the second part and surrounds the second part. The distance from the second part to the top of the mounting groove is greater than the distance from the first part to the top of the mounting groove. The explosion-proof valve is disposed in the first part and spaced apart from the second part. The second part has the vent hole and the liquid injection hole.

[0013] According to one embodiment of this application, the explosion-proof valve includes a valve body and a protective component. The protective component is disposed on the side of the valve body opposite to the vent hole and connected to the cover plate body. The side of the valve body opposite to the protective component is connected to the sealing pin.

[0014] Secondly, this application provides a battery cell including a housing and a cover assembly as described in any of the above embodiments, wherein the cover assembly is connected to the housing to form a receiving cavity.

[0015] According to one embodiment of this application, an insulating member is included, the insulating member being disposed inside the cover plate assembly, the insulating member having a first connecting hole and a second connecting hole formed thereon, the first connecting hole connecting the receiving cavity and the vent hole, and the second connecting hole connecting the receiving cavity and the injection hole.

[0016] Thirdly, this application provides a battery device including a battery cell from any of the above embodiments.

[0017] Fourthly, this application provides a vehicle including the battery device of any of the above embodiments.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of a single battery cell provided in an embodiment of this application;

[0021] Figure 2 This is one of the structural schematic diagrams of the cover plate assembly provided in the embodiments of this application;

[0022] Figure 3 This is a second schematic diagram of the structure of the cover plate assembly provided in the embodiments of this application;

[0023] Figure 4 This is the third structural schematic diagram of the cover plate assembly provided in the embodiments of this application;

[0024] Figure 5 yes Figure 4 A partial sectional view at point FF;

[0025] Figure 6 yes Figure 5 A magnified view of a section at point G.

[0026] Figure label:

[0027] 100 cells

[0028] Cover plate assembly 1, cover plate body 11, vent hole 111, injection hole 112, mounting groove 113, first part 1131, second part 1132, reinforcing rib 1133; explosion-proof valve assembly 12, explosion-proof valve 121, valve body 1211, protective component 1212, sealing nail 122, connecting part 1221, second snap-fit ​​component 12211, sealing part 1222, first snap-fit ​​component 12221, positive electrode post 13, negative electrode post 14.

[0029] 2. Housing; 3. Electrode assembly; 4. Insulating component. Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0031] The following is for reference. Figures 1-6 This application describes a cover plate assembly 1, a battery cell 100, a battery device, and a vehicle according to embodiments thereof.

[0032] like Figure 1 and Figure 4As shown, the cover plate assembly 1 according to an embodiment of this application includes: a cover plate body 11 and an explosion-proof valve 121 assembly 12.

[0033] The battery cell 100 includes a housing 2 and a cover assembly 1, which cooperate to form a receiving cavity for the battery cell 100. The formed receiving cavity can be used to accommodate an electrode assembly 3, an electrolyte, and other components.

[0034] The housing 2 and the top cover assembly can be independent components. An opening can be provided on the housing 2, and the top cover can be used to close the opening to form the internal environment of the battery cell 100. The cover assembly 1 is provided with a positive terminal post 13, a negative terminal post 14, an explosion-proof valve 121, and a liquid injection hole 112, etc.

[0035] like Figure 2 and Figure 3 As shown, the cover plate body 11 forms an exhaust hole 111 and an injection hole 112.

[0036] The explosion-proof valve assembly 12 includes an explosion-proof valve 121 and a sealing pin 122 connected together. The explosion-proof valve 121 is connected to the cover plate body 11, and the explosion-proof valve 121 seals the vent hole 111, and the sealing pin 122 seals the injection hole 112. The orthographic projection of the vent hole 111 on the cover plate body 11 and the orthographic projection of the injection hole 112 on the cover plate body 11 are located within the orthographic projection of the explosion-proof valve 121 on the cover plate body 11.

[0037] The explosion-proof valve 121 can protrude from the surface of the cover plate body 11 or be flush with the surface of the cover plate body 11. The specific design can be determined according to the material of the cover plate or the depth of the grooves on the surface of the cover plate to ensure the detonation pressure.

[0038] Both the vent hole 111 and the injection hole 112 are through holes. The vent hole 111 is used to connect the receiving cavity with the external environment, and the injection hole 112 is used to inject liquid into the receiving cavity.

[0039] The explosion-proof valve 121 and the cover plate body 11 can be fixedly connected by welding, gluing or mechanical connection.

[0040] For example, the explosion-proof valve 121 and the cover plate body 11 can be connected by welding methods such as laser welding, electron beam welding, and resistance welding.

[0041] For example, the explosion-proof valve 121 and the cover plate body 11 can be connected by adhesive bonding methods such as structural adhesive bonding or anaerobic adhesive bonding.

[0042] For example, the explosion-proof valve 121 and the cover plate body 11 can be connected by means of riveting or threaded connection.

[0043] The explosion-proof valve 121 is sealed to the vent 111. When the internal pressure of the battery cell 100 exceeds the set value, the explosion-proof valve 121 will rupture first, thereby connecting the vent 111 to the external environment to achieve rapid pressure relief.

[0044] For example, the explosion-proof valve 121 can seal the vent 111 by covering the vent 111 and sealing it with the cover plate body 11.

[0045] The sealing nail 122 is sealed to the injection hole 112. After the battery cell 100 is injected with liquid, the explosion-proof valve assembly 12 is connected to the cover body 11 to achieve simultaneous sealing of the vent hole 111 and the injection hole 112 by the cover body 11. There is no need to seal the vent hole 111 and the injection hole 112 separately, which reduces the processing steps.

[0046] For example, the explosion-proof valve 121 and the sealing nail 122 can be connected by means of integral molding, welding or gluing.

[0047] Among them, such as Figure 4 As shown, the orthographic projection of the vent hole 111 on the cover plate body 11 and the orthographic projection of the injection hole 112 on the cover plate body 11 are located within the orthographic projection of the explosion-proof valve 121 on the cover plate body 11. That is, the explosion-proof valve 121 can cover the vent hole 111 and the injection hole 112. When the cover plate body 11 and the explosion-proof valve 121 are sealed together, the vent hole 111 and the injection hole 112 are both located within the sealed space formed by the explosion-proof valve 121 and the cover plate body 11.

[0048] In related technologies, regarding structural design, traditional dual-electrode battery cells typically have an injection hole and an explosion-proof valve mounting hole at the top of the cover plate. The different positions of these two holes occupy valuable space within the cover plate. Regarding the operational mechanism, traditional battery cells require welding the explosion-proof valve to the cover plate before injection, ensuring no air leakage. After injection, a rubber nail is inserted into the injection hole, and then the rubber nail is welded to the cover plate and its airtightness is tested. This process involves two welding steps and two sealing tests, making it complex and inefficient. If the injection hole is located at the bottom of the explosion-proof valve without a vent, in the event of thermal runaway, the pressure is primarily located at the injection hole rather than the explosion-proof valve, preventing it from reaching its burst strength and thus posing a safety risk.

[0049] According to the cover plate assembly 1 provided in the embodiments of this application, the positions of the vent hole 111 and the liquid injection hole 112 on the cover plate body 11 coincide with the position of the explosion-proof valve 121 on the cover plate body 11, and the explosion-proof valve 121 and the sealing nail 122 are connected. After the liquid injection is completed, the explosion-proof valve 121 and the cover plate body 11 can be connected by welding or other means, thereby achieving simultaneous sealing of the vent hole 111 and the liquid injection hole 112. Compared with the related technology, which requires separate sealing welding and sealing testing of the vent hole 111 and the liquid injection hole 112, this application omits the welding process and sealing test step of sealing the sealing nail 122 and the liquid injection hole 112, simplifying the production process and improving production efficiency. At the same time, the vent hole 111 of this application can discharge the gas inside the battery cell 100 during liquid injection, improving the liquid injection efficiency.

[0050] In some embodiments, such as Figure 3 and Figure 6 As shown, the sealing nail 122 includes a connecting part 1221 and a sealing part 1222. The connecting part 1221 is connected to the explosion-proof valve 121, and the sealing part 1222 is sleeved on the outside of the connecting part 1221.

[0051] The connecting part 1221 and the sealing part 1222 can be connected by means of sleeve, snap-fit ​​or adhesive.

[0052] The sealing part 1222 can be an elastic element so that the sealing part and the injection hole 112 form an interference fit sealing connection.

[0053] For example, the elastic element can be a rubber element or a silicone element.

[0054] When the sealing pin 122 is located at the injection hole 112, the sealing part 1222 is located between the connecting part 1221 and the injection hole 112.

[0055] The sealing part 1222 and the explosion-proof valve 121 can be made of the same material to increase the stability of the connection between the sealing part 1222 and the explosion-proof valve 121.

[0056] For example, both the connecting part 1221 and the explosion-proof valve 121 are metal parts, so that the connecting part 1221 and the explosion-proof valve 121 can be connected by welding or integral molding.

[0057] For example, the sealing part 1222 and the explosion-proof valve 121 can be plastic parts, and the sealing part 1222 and the explosion-proof valve 121 can be integrally molded by injection molding or the like.

[0058] In some embodiments, such as Figure 6As shown, a first snap-fit ​​member 12221 is provided on one of the outer wall of the connecting part 1221 and the inner wall of the sealing part 1222, and a second snap-fit ​​member 12211 is provided on the other of the outer wall of the connecting part 1221 and the inner wall of the sealing part 1222. The first snap-fit ​​member 12221 and the second snap-fit ​​member 12211 snap-fit ​​together.

[0059] The connecting part 1221 and the sealing part 1222 are connected by the first snap-fit ​​member 12221 and the second snap-fit ​​member 12211, which makes assembly convenient.

[0060] For example, one of the first latching member 12221 and the second latching member 12211 is a protrusion, and the other of the first latching member 12221 and the second latching member 12211 is a slot that engages with the protrusion.

[0061] In some embodiments, such as Figure 6 As shown, the connecting part 1221 includes a guide section and a connecting section. The outer diameter of the guide section gradually decreases in the direction away from the connecting section and closer to the connecting section, thereby facilitating the assembly of the connecting part 1221 and the sealing part 1222.

[0062] In some embodiments, such as Figure 6 As shown, the outer diameter of the connecting section is smaller than the outer diameter of the guide section facing the connecting section, so that a protrusion is formed at the end of the guide section facing the connecting section, and a groove is formed on the inner wall of the seal to cooperate with the protrusion, which increases the stability of the connection between the connecting part 1221 and the sealing part 1222 and reduces the risk of the sealing part 1222 falling off.

[0063] In some embodiments, such as Figure 6 As shown, the outer diameter of the end of the sealing pin 122 facing the cover plate body 11 is smaller than the outer diameter of the end of the sealing pin 122 away from the cover plate body 11.

[0064] In this embodiment, the end of the sealing pin 122 away from the explosion-proof valve 121 forms a guide surface, and the end of the sealing pin 122 away from the explosion-proof valve 121 is tapered, thereby facilitating the assembly of the sealing pin 122 with the injection hole 112.

[0065] In some embodiments, such as Figure 2 As shown, the cover plate body 11 is provided with an installation groove 113. The bottom of the installation groove 113 is provided with an exhaust hole 111 and an injection hole 112. At least a part of the explosion-proof valve 121 is located in the installation groove 113 and is connected to the groove wall of the installation groove 113.

[0066] The mounting groove 113 is contoured to the explosion-proof valve 121, and the cover plate body 11 is connected to the explosion-proof valve 121 with a concave-convex fit, which increases the connection area between the explosion-proof valve 121 and the mounting groove 113 and increases the sealing performance.

[0067] In some embodiments, such as Figure 2As shown, the bottom of the mounting groove 113 includes a first part 1131 and a second part 1132. The first part 1131 is located outside the second part 1132 and is arranged around the second part 1132. The distance from the second part 1132 to the top of the mounting groove 113 is greater than the distance from the first part 1131 to the top of the mounting groove 113. The explosion-proof valve 121 is arranged in the first part 1131 and spaced apart from the second part 1132. The second part 1132 has an exhaust hole 111 and an injection hole 112.

[0068] For example, the explosion-proof valve 121 and the first part 1131 can be connected by means of stacking, abutting or gluing.

[0069] In this embodiment, the explosion-proof valve 121 is spaced apart from the second part 1132, forming an air chamber between them. Multiple exhaust holes 111 are connected to the air chamber, allowing the gas discharged from the exhaust holes 111 to collect within the air chamber and pressurize the explosion-proof valve 121. Compared to the solution where multiple exhaust holes 111 pressurize the explosion-proof valve 121 separately, causing excessive local pressure and resulting in local deformation and warping of the explosion-proof valve 121, this embodiment can apply uniform pressure to the explosion-proof valve 121. When the pressure on the battery cell 100 is too high, the explosion-proof valve 121 will deform and release pressure as a whole, reducing the risk of excessively fast local airflow and lowering safety risks.

[0070] In some embodiments, such as Figure 3 and Figure 5 As shown, the sealing nail 122 protrudes from the side of the explosion-proof valve 121 facing the cover plate body 11, and the sealing nail 122 is located inside the injection hole 112 to improve the sealing effect between the sealing nail 122 and the injection hole 112.

[0071] In some embodiments, such as Figure 2 As shown, there are multiple vent holes 111, which are spaced apart around the axis of the injection hole 112.

[0072] Multiple vent holes 111 are spaced apart from the injection holes 112. The multiple vent holes 111 are spaced apart to form a reinforcing structure at the bottom of the mounting groove 113, which can enhance the structural strength of the bottom of the mounting groove 113.

[0073] In some embodiments, the bottom of the mounting groove 113 forms a structure of multiple intersecting reinforcing ribs 1133, and the intersection of the multiple reinforcing ribs 1133 is provided with an injection hole 112, and the spaced portions of the reinforcing ribs 1133 form an exhaust hole 111.

[0074] Among them, the reinforcing rib 1133 structure may include two intersecting ribs distributed at 90°.

[0075] In this embodiment, by setting multiple reinforcing ribs 1133, the structural strength of the bottom of the mounting groove 113 can be enhanced.

[0076] In some embodiments, the wall of the injection hole 112 is spaced apart from the outer wall of the reinforcing rib 1133 so that the injection hole 112 is sealed to the sealing pin 122.

[0077] Because the injection hole 112 needs to be provided, the width of the reinforcing rib 1133 has been widened compared with the reinforcing ribs in related technologies. In order to improve the stability of venting, the area of ​​the mounting groove 113 needs to be increased, thereby increasing the venting area and improving the reliability of the battery cell 100.

[0078] According to the cover assembly 1 provided in this application embodiment, after the battery cell 100 undergoes the assembly process, it is transferred to the liquid injection station for liquid injection. The vent 111 can discharge the gas inside the battery cell 100 during liquid injection, improving the liquid injection efficiency. After liquid injection, the explosion-proof valve 121 and the cover plate can be joined by only one welding. If the battery cell 100 experiences thermal runaway, the generated gas can be discharged and collected through the vent 111, thereby causing the surface pressure of the explosion-proof valve 121 to reach the burst pressure and burst smoothly. This prevents the gas from being unable to be discharged in time due to rubber nails, thus improving battery safety.

[0079] In some embodiments, such as Figure 2 and Figure 3 As shown, the explosion-proof valve 121 includes a valve body 1211 and a protective element 1212. The protective element 1212 is disposed on the side of the valve body 1211 away from the exhaust port 111 and is connected to the cover plate body 11. The side of the valve body 1211 away from the protective element 1212 is connected to the sealing nail 122.

[0080] The valve body 1211 includes an outer ring and a valve plate movably connected to the outer ring. The valve plate can move relative to the outer ring to open or close the vent 111. When the pressure inside the battery cell 100 is normal, the valve plate and the outer ring are located on the same plane to close the vent 111. When the pressure inside the battery cell 100 is too high, the valve plate warps to open the vent 111 to release pressure.

[0081] In this embodiment, after the liquid injection is completed, the valve body 1211 and the sealing nail 122 assembly are placed into the mounting groove 113, and then the protective plate is placed into the mounting groove 113 and welded to the groove wall of the mounting groove 113.

[0082] This application also provides a battery cell 100, including a housing 2 and a cover assembly 1 of any of the above embodiments, wherein the cover assembly 1 is connected to the housing 2 to form a receiving cavity.

[0083] According to the battery cell 100 provided in this application embodiment, the positions of the vent hole 111 and the liquid injection hole 112 on the cover plate body 11 coincide with the position of the explosion-proof valve 121 on the cover plate body 11, and the explosion-proof valve 121 and the sealing pin 122 are connected. After liquid injection, the explosion-proof valve 121 and the cover plate body 11 can be connected by welding or other means, thereby achieving simultaneous sealing of the vent hole 111 and the liquid injection hole 112. Compared with the related technology, which requires separate sealing welding and sealing testing of the vent hole 111 and the liquid injection hole 112, this application omits the welding process of sealing the connection between the sealing pin 122 and the liquid injection hole 112 and the sealing test step, simplifying the production process and improving production efficiency. At the same time, the vent hole 111 of this application can discharge the gas inside the battery cell 100 during liquid injection, improving the liquid injection efficiency.

[0084] The battery cell 100 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 100 can be flat, cuboid, or other shapes.

[0085] A battery cell 100 refers to the smallest unit that makes up a battery device. A battery cell 100 includes a casing, a battery cell, and an electrolyte. The casing is used to house the battery cell and the electrolyte. The casing includes a top cover assembly and a housing 2. The top cover assembly is a component that closes onto the opening of the housing 2 to separate the internal environment of the battery cell 100 from the external environment.

[0086] The housing 2 can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 2 can be determined according to the specific shape and size of the battery cell. The material of the housing 2 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this.

[0087] In some embodiments, the battery cell 100 further includes an insulating member 4 disposed inside the cover assembly 1. The insulating member 4 has a first connecting hole and a second connecting hole formed on it. The first connecting hole connects the receiving cavity and the vent hole 111, and the second connecting hole connects the receiving cavity and the liquid injection hole 112.

[0088] This application also provides a battery device, including the battery cell 100 of any of the above embodiments.

[0089] According to the battery device provided in this application embodiment, the positions of the vent hole 111 and the injection hole 112 on the cover plate body 11 coincide with the position of the explosion-proof valve 121 on the cover plate body 11, and the explosion-proof valve 121 and the sealing pin 122 are connected. After the injection is completed, the explosion-proof valve 121 and the cover plate body 11 can be connected by welding or other means, thereby achieving simultaneous sealing of the vent hole 111 and the injection hole 112. Compared with the related technology, which requires separate sealing welding and sealing testing of the vent hole 111 and the injection hole 112, this application omits the welding process and sealing test step of sealing the sealing pin 122 and the injection hole 112, simplifying the production process and improving production efficiency. At the same time, the vent hole 111 of this application can discharge the gas inside the battery cell 100 during injection, improving the injection efficiency.

[0090] This application also provides an electrical device, including the battery device of any of the above embodiments.

[0091] According to the electrical device provided in this application embodiment, the positions of the vent hole 111 and the injection hole 112 on the cover plate body 11 coincide with the position of the explosion-proof valve 121 on the cover plate body 11, and the explosion-proof valve 121 and the sealing pin 122 are connected. After the injection is completed, the explosion-proof valve 121 and the cover plate body 11 can be connected by welding or other means, thereby achieving simultaneous sealing of the vent hole 111 and the injection hole 112. Compared with the related technology, which requires separate sealing welding and sealing testing of the vent hole 111 and the injection hole 112, this application omits the welding process and sealing test steps for sealing the sealing pin 122 and the injection hole 112, simplifying the production process and improving production efficiency. At the same time, the vent hole 111 of this application can discharge the gas inside the battery cell 100 during injection, improving the injection efficiency.

[0092] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0093] This application also provides a vehicle that includes the battery device of any of the above embodiments.

[0094] Battery devices can serve not only as the operating power source for vehicles, but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power for vehicles.

[0095] The vehicle provided according to the embodiments of this application, having the battery device of any of the above embodiments, can achieve the effects that the battery device of any of the above embodiments can achieve.

[0096] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0097] In the description of this application, 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", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0098] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0099] In the description of this application, "multiple" means two or more.

[0100] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0101] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0102] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. 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.

[0103] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A cover plate assembly, characterized in that, include: The cover plate body forms an exhaust port and a liquid injection port; An explosion-proof valve assembly includes a connected explosion-proof valve and a sealing pin. The explosion-proof valve is connected to the cover plate body and seals the vent hole. The sealing pin seals the injection hole. The orthographic projections of the vent hole and the injection hole on the cover plate body are both located within the orthographic projection of the explosion-proof valve on the cover plate body.

2. The cover plate assembly according to claim 1, characterized in that, The sealing nail includes a connecting part and a sealing part. The connecting part is connected to the explosion-proof valve, and the sealing part is sleeved on the outside of the connecting part.

3. The cover plate assembly according to claim 2, characterized in that, The sealing part is an elastic element, and the connecting part is a metal element.

4. The cover plate assembly according to claim 2 or 3, characterized in that, One of the outer wall of the connecting part and the inner wall of the sealing part is provided with a first snap-fit ​​member, and the other of the outer wall of the connecting part and the inner wall of the sealing part is provided with a second snap-fit ​​member, and the first snap-fit ​​member and the second snap-fit ​​member snap-fit ​​together.

5. The cover plate assembly according to any one of claims 1-4, characterized in that, The outer diameter of the end of the sealing pin facing the cover plate body is smaller than the outer diameter of the end of the sealing pin away from the cover plate body.

6. The cover plate assembly according to any one of claims 1-5, characterized in that, The cover plate body is provided with an installation groove, and the bottom of the installation groove is provided with the vent hole and the liquid injection hole. At least part of the explosion-proof valve is located in the installation groove and is connected to the groove wall.

7. The cover plate assembly according to claim 6, characterized in that, The bottom of the mounting groove includes a first part and a second part. The first part is located outside the second part and surrounds the second part. The distance from the second part to the top of the mounting groove is greater than the distance from the first part to the top of the mounting groove. The explosion-proof valve is disposed in the first part and spaced apart from the second part. The second part has the vent hole and the liquid injection hole.

8. The cover plate assembly according to claim 6 or 7, characterized in that, The explosion-proof valve includes a valve body and a protective component. The protective component is disposed on the side of the valve body opposite to the vent hole and is connected to the cover plate body. The side of the valve body opposite to the protective component is connected to the sealing nail.

9. The cover plate assembly according to any one of claims 6-8, characterized in that, The bottom of the mounting groove has multiple intersecting reinforcing ribs, the intersection of the multiple reinforcing ribs is provided with the injection hole, and the interval of the reinforcing ribs forms the vent hole; The vent holes include multiple vent holes, which are spaced apart around the axis of the injection hole.

10. A single battery cell, characterized in that, The device includes a housing and a cover assembly according to any one of claims 1-9, the cover assembly being connected to the housing to form a receiving cavity.

11. The battery cell according to claim 10, characterized in that, The device includes an insulating component disposed on the inner side of the cover plate assembly. The insulating component has a first connecting hole and a second connecting hole formed thereon. The first connecting hole connects the receiving cavity and the vent hole, and the second connecting hole connects the receiving cavity and the injection hole.

12. A battery device, characterized in that, Includes the battery cell described in claim 10 or 11.

13. A vehicle, characterized in that, Includes the battery device as described in claim 12.

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