Plugging assembly and battery

Abstract

The utility model discloses a plugging assembly and a battery, and the plugging assembly comprises a cover body and a plugging piece. The cover body is provided with a containing groove and a notch communicated with the containing groove, the cover body is provided with a first surface, and the notch is located in the first surface; the plugging piece comprises a plugging piece body, the plugging piece body is located in the containing groove, the plugging piece body is used for being connected with the shell in a sealed mode, the plugging piece body and the cover body jointly plug the pressure relief opening, and when the temperature of the battery reaches a set value, the plugging piece body can be melted to make contact with the plugging assembly to plug the pressure relief opening. The cover body in the embodiment is provided with the accommodating groove, and the plugging piece is positioned in the accommodating groove, so that when the plugging assembly is used for the battery, the first surface of the cover body and the shell can be sealed, the plugging piece is positioned in a closed space, the safety oxidation speed is reduced, and the safety of the battery is improved. Therefore, the long-term performance and the mechanical performance of the plugging assembly are improved, and the service life of the battery is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a plugging assembly and battery. BACKGROUND

[0002] In some technologies, a sealing device is arranged at the pressure relief port of the battery, the sealing device comprises a steel sheet and a PP layer, the PP layer is connected to the shell and blocks the pressure relief port, the steel sheet is connected to the side of the PP layer away from the shell to improve the strength of the sealing device, when the temperature inside the battery rises, the PP layer melts and contacts the pressure relief port to block the pressure relief port, thereby realizing the function of pressure relief of the battery. However, in this scheme, the PP layer is exposed to the air, and the PP is prone to oxidation after a long time, which leads to low long-term performance and mechanical performance of the sealing device, and low service life of the battery. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art. To this end, the utility model provides a plugging assembly, which can be used in a battery to improve the service life of the battery.

[0004] The utility model also provides a battery comprising the above plugging assembly.

[0005] According to the plugging assembly of the first aspect of the utility model embodiment, it comprises: a cover body and a plugging piece.

[0006] The cover body is formed with a receiving groove and a slot opening in communication with the receiving groove, the cover body has a first surface, and the slot opening is located on the first surface; the plugging piece comprises a plugging piece, which is located in the receiving groove, and is used to be sealingly connected with the shell and jointly block the pressure relief port with the cover body, and when the temperature of the battery reaches a set value, the plugging piece can melt to release the plugging of the plugging assembly to the pressure relief port.

[0007] The plugging assembly according to the utility model embodiment has at least the following beneficial effects:

[0008] In this embodiment, the plugging piece is used to be sealingly connected with the shell and jointly block the pressure relief port with the cover body, and when the temperature of the battery reaches a set value, the plugging piece melts to release the plugging of the plugging assembly to the pressure relief port, thereby realizing the pressure relief of the battery and reducing the risk of explosion of the battery, thereby improving the safety of the battery. On this basis, the cover body in this embodiment has a receiving groove, and the plugging piece is located in the receiving groove, so that when the plugging assembly of this embodiment is used in the battery, the first surface of the cover body can be sealed with the shell, so that the plugging piece is located in a sealed space, the oxidation speed is reduced, and the long-term performance and mechanical performance of the plugging assembly of this embodiment are improved, thereby improving the service life of the battery.

[0009] According to some embodiments of the present application, the plugging assembly further comprises a connecting piece, the first surface is connected to the connecting piece, the connecting piece is used for welding with the shell, the connecting piece has a avoiding hole, and the avoiding hole is communicated with the pressure relief opening.

[0010] According to some embodiments of the present application, the accommodating groove has a first inner wall arranged opposite to the slot, and a second inner wall surrounding the first inner wall.

[0011] The plugging piece is arranged spaced apart from the first inner wall; and / or,

[0012] The plugging piece is arranged spaced apart from the second inner wall.

[0013] According to some embodiments of the present application, the plugging assembly further comprises a sealing piece, the sealing piece is used for being clamped between the first surface and the shell, and the connection relationship between at least one of the first surface and the shell and the sealing piece is abutment; or,

[0014] The plugging assembly further comprises a connecting piece, the plugging piece is connected to the connecting piece, the connecting piece is used for welding with the shell, the connecting piece has an avoiding hole, the avoiding hole is used for being communicated with the pressure relief opening, the sealing piece is clamped between the first surface and the connecting piece, and the connection relationship between at least one of the first surface and the connecting piece and the sealing piece is abutment.

[0015] According to some embodiments of the present application, the plugging piece has a second surface and a third surface opposite to each other, the second surface is used for being connected with the shell, the third surface is connected to the inner wall of the accommodating cavity, and the sealing piece is a flexible structure.

[0016] According to some embodiments of the present application, along the normal direction of the first surface, the size of the plugging piece is L1, the size of the sealing piece is L2, the linear expansion coefficient of the plugging piece is a1, the linear expansion coefficient of the sealing piece is a2, and L1 / L2=a2 / a1.

[0017] According to some embodiments of the present application, the plugging piece has a second surface and a third surface opposite to each other, the second surface is used for being connected with the shell, the third surface is connected to the inner wall of the accommodating cavity, and the direction from the second surface to the third surface is a first direction.

[0018] The sealing piece is connected to the plugging piece, the plugging assembly further comprises a protection piece, the protection piece is connected to the sealing piece and protrudes from the sealing piece along the first direction, the protection piece is arranged spaced apart from the plugging piece to form a protection groove, and the first surface is located in the protection groove.

[0019] The battery according to the second aspect of the utility model, including: shell and the plugging assembly that first aspect embodiment is described, the shell has accommodating cavity and with accommodating cavity communication pressure relief port, the plugging assembly is connected in the shell, and the pressure relief port is covered, and the first surface is sealed between the shell.

[0020] The battery according to the utility model embodiment has at least the following beneficial effects:

[0021] The plugging assembly of the first aspect embodiment is sealed to the shell, and the cover body is used to jointly block the pressure relief port, and when the temperature of the battery reaches the set value, the plugging member is melted to remove the plugging of the plugging assembly to the pressure relief port, thereby realizing the pressure relief of the battery, reducing the risk of explosion of the battery, and improving the safety of the battery. On this basis, the cover body in the embodiment has a receiving groove, and the plugging member is located in the receiving groove, and the first surface of the cover body is sealed with the shell, so that the plugging member is located in the closed space, thereby reducing the oxidation speed of the safety, to improve the long-term performance and mechanical performance of the plugging assembly of the embodiment, and further improve the service life of the battery.

[0022] According to some embodiments of the utility model, the battery further includes an electric core, the electric core is located in the accommodating cavity, and the pressure relief port is also used to inject electrolyte into the accommodating cavity, so that the electric core is soaked in the electrolyte.

[0023] According to some embodiments of the utility model, the plugging assembly further includes a connecting piece, the first surface is connected to the connecting piece, the connecting piece has an avoiding hole, and the connecting piece is located in the pressure relief port and is welded to the shell.

[0024] Additional aspects and advantages of the utility model will be partially given in the following description, some will become apparent from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0025] The utility model will be further described in combination with the drawings and embodiments, wherein:

[0026] Figure 1 It is the explosion view of the first plugging assembly of the first aspect embodiment of the utility model;

[0027] Figure 2 It is the sectional view of the first plugging assembly of the first aspect embodiment of the utility model;

[0028] Figure 3 It is the sectional view of the second plugging assembly of the first aspect embodiment of the utility model;

[0029] Figure 4The cross-sectional view of the third plugging assembly of the first aspect embodiment of the utility model;

[0030] Figure 5 The cross-sectional view of the fourth plugging assembly of the first aspect embodiment of the utility model;

[0031] Figure 6 For Figure 5 The enlarged view of the A area in the middle;

[0032] Figure 7 The cross-sectional view of the fifth plugging assembly of the first aspect embodiment of the utility model;

[0033] Figure 8 The partial cross-sectional view of the battery of the second aspect embodiment of the utility model.

[0034] Reference signs:

[0035] Cover body 100, containing groove 110, first inner wall 111, second inner wall 112, slot 120, first surface 130;

[0036] Plugging piece 200, through hole 210;Second surface 220, third surface 230;

[0037] Connecting piece 300, avoiding hole 310;

[0038] Sealing piece 400, protection piece 500, protection groove 600;

[0039] Shell 700, containing cavity 710, pressure relief port 720, liquid injection port 730;

[0040] Battery cell 800. Specific implementation

[0041] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0042] In the description of the utility model, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as limiting the utility model.

[0043] In the description of the utility model, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number.If there is a description to the first, the second is only used for distinguishing the purpose of technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0044] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection should be understood in a broad sense, and the person skilled in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0045] In some technologies, a sealing device is arranged at the pressure relief port of the battery, the sealing device includes a steel sheet and a PP layer, the PP layer is connected to the shell and blocks the pressure relief port, and the steel sheet is connected to the side of the PP layer away from the shell to improve the strength of the sealing device.When the internal temperature of the battery rises, the PP layer melts and contacts the pressure relief port, thereby realizing the function of battery pressure relief.However, in this scheme, the PP layer is exposed to the air, and the PP is prone to oxidation after a long time, resulting in low long-term performance and mechanical performance of the sealing device, and low battery life.

[0046] In view of the above background, the present embodiment proposes a plugging assembly which can be used in a battery to improve the life of the battery. Figures 1 to 3 , Figure 1 It is an explosion view of the first plugging assembly of the first aspect embodiment of the utility model, Figure 2 It is a sectional view of the first plugging assembly of the first aspect embodiment of the utility model, Figure 3 It is a sectional view of the second plugging assembly of the first aspect embodiment of the utility model; the plugging assembly of the present embodiment comprises: a cover body 100 and a plugging piece 200.

[0047] Specifically, the cover body 100 is made of high-strength structure such as steel or aluminum material, so as to improve the strength of the plugging assembly and the impact resistance of the battery, the cover body 100 is formed with a containing groove 110 and a slot 120 communicating with the containing groove 110, the cover body 100 has a first surface 130, and the slot 120 is located on the first surface 130.The plugging piece 200 is made of materials such as polypropylene (PP) or polyethylene terephthalate (PET), the plugging piece 200 comprises a plugging piece 200, the plugging piece 200 is located in the containing groove 110, and the plugging piece 200 is used for sealing connection with the shell 700, so that the plugging assembly blocks the pressure relief port 720.For example, the plugging piece 200 is a flat plate structure (such as Figure 1As shown), the sealing member 200 is connected to the housing 700 and seals the pressure relief port 720. Alternatively, in some embodiments, the sealing member 200 has a second surface 220 and a third surface 230 disposed opposite to each other, and a through hole 210 connecting the second surface 220 and the third surface 230 (e.g., ...). Figure 3 As shown, the third surface 230 is sealed to the inner wall of the receiving groove 110 (specifically, the first inner wall 111 in the embodiment below). Thus, when the second surface 220 of the sealing member 200 is sealed to the outer casing 700, the sealing member 200 and the cover 100 jointly seal the pressure relief port 720. When the battery temperature reaches a set value, the sealing member 200 can melt to contact the sealing assembly and seal the pressure relief port 720.

[0048] For example, the sealing member 200 is made of PP. Since the melting point of PP is 164°C, this value is set to 164°C. When the battery temperature reaches 164°C, the sealing member 200 melts, allowing the sealing assembly of this embodiment to release the seal on the pressure relief port 720, thereby releasing battery pressure, reducing the risk of battery explosion, and improving battery safety. Furthermore, the cover 100 in this embodiment has a receiving groove 110, and the sealing member 200 is located within the receiving groove 110. Therefore, when the sealing assembly of this embodiment is used in a battery, the first surface 130 of the cover 100 can be sealed to the outer casing 700, thus placing the sealing member 200 within a sealed space, reducing the rate of oxidation, thereby improving the long-term performance and mechanical properties of the sealing assembly of this embodiment, and ultimately extending the battery's lifespan.

[0049] Reference Figure 1 In some embodiments, the sealing assembly further includes a connector 300, with the first surface 130 connected to the connector 300. The connector 300 is used for welding to the housing 700, and the connector 300 has a clearance hole 310 communicating with a pressure relief port 720. Specifically, it is understood that the battery contains electrolyte, and during the filling process, electrolyte may remain on the surface of the housing 700, resulting in a weak connection between the sealing component 200 and the housing 700. Therefore, this embodiment also includes a connector 300, which is made of weldable materials such as aluminum, steel, or stainless steel. When the sealing assembly of this embodiment is used in a battery, the sealing component 200 is first connected to the connector 300, and then the connector 300 is welded to the housing 700, thereby improving the connection strength between the sealing assembly and the housing 700 and thus improving the battery life.

[0050] Reference Figure 4 , Figure 4In some embodiments, the accommodating groove 110 has a first inner wall 111 oppositely arranged with the slot 120, and a second inner wall 112 surrounding the first inner wall 111, and the plugging member 200 is arranged in a spaced manner with the first inner wall 111. Specifically, it can be understood that when an object is heated, the atomic motion in the object will change with temperature, resulting in an increase in vibration amplitude, so that the object expands. Therefore, during normal use of the battery, as the temperature rises, the plugging member 200 will expand to a certain extent. In order to avoid the plugging member 200 from lifting the cover body 100 and thus reducing or failing the sealing effect between the cover body 100 and the shell 700, in the embodiment, the plugging member 200 is arranged in a spaced manner with the first inner wall 111, so that the plugging member 200 has a certain expansion space, thereby improving the sealing property between the cover body 100 and the shell 700 during normal use, reducing the oxidation speed of the plugging member 200, and thus improving the service life of the battery. Similarly, in some embodiments, the plugging member 200 is arranged in a spaced manner with the second inner wall 112, thereby avoiding the cover body 100 from being extruded and deformed due to the expansion of the plugging member 200, so as to improve the sealing property between the cover body 100 and the shell 700 during normal use.

[0051] With reference to Figure 5 and Figure 6 , Figure 5 In the fourth kind of plugging assembly of the first aspect of the embodiment of the utility model, Figure 6 As Figure 5 In some embodiments, the plugging assembly further comprises a sealing member 400, the sealing member 400 is used for being clamped between the first surface 130 and the shell 700, and the connection relationship between at least one of the first surface 130 and the shell 700 and the sealing member 400 is abutment. Specifically, it can be understood that when the battery is in thermal runaway, the plugging assembly will be blown open by the internal high-temperature gas to realize the pressure relief function. Therefore, when the plugging assembly of the embodiment is used for the battery, the connection relationship between at least one of the first surface 130 and the shell 700 and the sealing member 400 is abutment. For example, the sealing member 400 is in abutment with the cover body 100 and the shell 700, thereby when the cover body 100 is subjected to pressure due to thermal runaway of the battery, the cover body 100 can be more easily blown open, thereby improving the safety of the battery. Similarly, as in the above-mentioned embodiments, the plugging assembly further comprises a connecting member 300, the plugging member 200 is connected to the connecting member 300, the connecting member 300 is used for being welded with the shell 700, the connecting member 300 has an avoiding hole 310 for being communicated with the pressure relief port 720, the sealing member 400 is clamped between the first surface 130 and the connecting member 300, and the connection relationship between at least one of the first surface 130 and the connecting member 300 and the sealing member 400 is abutment.

[0052] With reference to Figure 5and Figure 6 In some embodiments, the blocking member 200 has a second surface 220 and a third surface 230 opposite to each other, the second surface 220 is used to connect with the shell 700, for example, the second surface 220 is connected to the connecting member 300 and indirectly connected to the shell 700 through the connecting member 300, or the second surface 220 is directly connected to the shell 700, and the third surface 230 is connected to the inner wall of the accommodating cavity 710, and the sealing member 400 is a flexible structure. Specifically, the sealing member 400 is formed in the form of filling glue, that is, when the blocking assembly of the present embodiment is used in a battery, the flexible sealing member 400 is formed by filling glue between the cover body 100 and the shell 700. Or the sealing member 400 of a certain thickness is prepared in advance, and the sealing member 400 is clamped between the cover body 100 and the shell 700 during assembly. Since the sealing member 400 is a flexible structure, the sealing member 400 can deform with the thermal expansion or cold shrinkage of the blocking member 200 to ensure the sealing effect between the cover body 100 and the shell 700, without the need to set a gap between the blocking member 200 and the cover body 100 as in the above-mentioned embodiments to reduce the size of the battery and improve the energy density of the battery.

[0053] Referring to Figure 5 and Figure 6 In some embodiments, along the normal direction of the first surface 130, the size of the blocking member 200 is L1, that is, the thickness of the blocking member 200 is L1, the size of the sealing member 400 is L2, that is, the size of the sealing member 400 is L2, the linear expansion coefficient of the blocking member 200 is a1, and the linear expansion coefficient of the sealing member 400 is a2, L1 / L2=a2 / a1. Specifically, the thermal expansion formula of an object is: ΔL=αL0ΔT, where L represents the linear expansion amount of the material, that is, the change amount of the length of the material after the temperature changes. Alpha represents the linear expansion coefficient, which is a inherent property of the material, representing the change amount of the unit length under the unit temperature change. L0 represents the initial length of the material. ΔT represents the change amount of the temperature, that is, the temperature difference before and after the material is heated. Therefore, under the same temperature change, the thickness change amount of the blocking member 200 is ΔL1=a1L1ΔT, and the thickness change amount of the sealing member 400 is ΔL2=a2L2ΔT, and in the present embodiment, L1 / L2=a2 / a1, that is, a1L1=a2L2, therefore ΔL1=ΔL2, so under the same temperature change, the expansion amount of the blocking member 200 is equal to the expansion amount of the sealing member 400. Therefore, when the blocking assembly of the present embodiment is used in a battery, the sealing member 400 and the blocking member 200 stretch and contract synchronously during the working process, thereby avoiding the gap between the cover body 100 and the sealing member 400, and further reducing the risk of oxidation of the blocking member 200 to improve the service life of the battery.

[0054] Referring to Figure 7 , Figure 7In some embodiments, the plugging assembly includes the plugging piece 200, the sealing piece 400, and the protection piece 500, the sealing piece 400 is connected to the outer peripheral wall of the plugging piece 200, the protection piece 500 is connected to the side of the sealing piece 400 away from the plugging piece 200, the sealing piece 400 and the plugging piece 200 and the protection piece 500 jointly form the protection groove 600, and the plugging piece 200, the sealing piece 400 and the protection piece 500 are an integral structure, and the sidewall of the cover body 100 is inserted into the protection groove 600, so as to improve the sealing property of the cover body 100 and reduce the risk of oxidation of the plugging piece 200.

[0055] In some embodiments, the plugging assembly includes the plugging piece 200, the sealing piece 400, and the protection piece 500, the sealing piece 400 is connected to the outer peripheral wall of the plugging piece 200, the protection piece 500 is connected to the side of the sealing piece 400 away from the plugging piece 200, the sealing piece 400 and the plugging piece 200 and the protection piece 500 jointly form the protection groove 600, and the plugging piece 200, the sealing piece 400 and the protection piece 500 are an integral structure, and the sidewall of the cover body 100 is inserted into the protection groove 600, so as to improve the sealing property of the cover body 100 and reduce the risk of oxidation of the plugging piece 200.

[0056] Further, in some embodiments, in the first direction, the size of the protection piece 500 does not exceed the size of the cover body 100, so as to avoid the protection piece 500 protruding from the cover body 100, thereby reducing the size of the battery and improving the energy density of the battery.

[0057] Referring to Figure 8 , Figure 8The battery of the second aspect embodiment is a partial sectional view of the battery, the battery is for example a steel shell battery or an aluminum shell battery or the like shell battery, and the battery comprises: an outer shell 700 and the blocking assembly of the first aspect embodiment.

[0058] It should be noted that the embodiment adopts all the technical features of the first aspect embodiment, and therefore has all the beneficial effects brought by the first aspect embodiment, which will not be described herein.

[0059] Referring to Figure 8 In some embodiments, the battery further comprises an electric core 800, the electric core 800 is located in the accommodating cavity 710, and the pressure relief port 720 is further used for injecting electrolyte into the accommodating cavity 710, so that the electric core 800 is soaked in the electrolyte, that is, the pressure relief port 720 and the liquid injection port 730 of the battery in the embodiment are the same opening on the outer shell 700, and the blocking assembly serves as both the sealing nail for blocking the liquid injection port 730 and the explosion-proof valve for the pressure relief port 720, so that the structure of the battery is simpler and the cost of the battery is reduced.

[0060] Referring to Figure 8 In some embodiments, the blocking assembly, like in the first aspect embodiment, further comprises a connecting piece 300, the first surface 130 is connected to the connecting piece 300, the connecting piece 300 is located in the pressure relief port 720 and is welded to the outer shell 700, so that no space is occupied on the outside of the outer shell 700, and the energy density of the battery is improved.

[0061] The utility model embodiment has been explained in detail above in combination with the drawings, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range of the ordinary skill of the art that possesses within the premise of not departing from the utility model's tenet. In addition, in the description of the utility model, the description of reference term "an embodiment", "some embodiments", "schematic embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the schematic representation of the above-mentioned term does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable way.

Claims

1. Occlusion assembly, characterized in that A relief valve sealing assembly for sealing a relief valve of a battery, comprising: a cover body having a receiving groove and a slot opening in communication with the receiving groove, the cover body having a first surface, the slot opening being located on the first surface, the first surface being configured to be sealingly arranged between an outer shell of the battery; a sealing member located in the receiving groove, the sealing member being configured to be sealingly connected with the outer shell, such that the sealing assembly seals the relief valve, and the sealing member being capable of melting when a temperature of the battery reaches a set value, so as to release the sealing of the relief valve by the sealing assembly.

2. The occlusion assembly of claim 1, wherein, The sealing assembly further comprises a connecting member, the sealing member being connected with the connecting member, the connecting member being configured to be welded with the outer shell, the connecting member having an avoiding hole in communication with the relief valve.

3. The occlusion assembly of claim 1, wherein, The receiving groove has a first inner wall facing the slot opening, and a second inner wall surrounding the first inner wall; the sealing member is spaced apart from the first inner wall; and / or the sealing member is spaced apart from the second inner wall.

4. The occlusion assembly of claim 1, wherein, The sealing assembly further comprises a sealing member, the sealing member being configured to be clamped between the first surface and the outer shell, and at least one of the first surface and the outer shell being in abutting connection with the sealing member; or The sealing assembly further comprises a connecting member, the sealing member being connected with the connecting member, the connecting member being configured to be welded with the outer shell, the connecting member having an avoiding hole in communication with the relief valve, the sealing member being clamped between the first surface and the connecting member, and at least one of the first surface and the connecting member being in abutting connection with the sealing member. The sealing member has a second surface and a third surface facing away from each other, the second surface being configured to be connected with the outer shell, and the third surface being connected with an inner wall of the receiving groove, the sealing member being a flexible structure.

5. The occlusion assembly of claim 4, wherein, Along a normal direction of the first surface, a size of the sealing member is L2, a linear expansion coefficient of the sealing member is a2, and L1 / L2=a2 / a1.

6. The occlusion assembly of claim 4, wherein, The sealing member has a second surface and a third surface facing away from each other, the second surface being configured to be connected with the outer shell, and the third surface being connected with an inner wall of the receiving groove, a direction from the second surface to the third surface being a first direction; 7. Occlusion assembly according to claim 4 or 6, characterized in that The sealing member is connected with the sealing member, the sealing assembly further comprises a protective member, the protective member being connected with the sealing member and protruding from the sealing member along the first direction, the protective member being spaced apart from the sealing member to form a protective groove, and the first surface being located in the protective groove. A battery, comprising:

8. A battery characterized by an outer shell having a receiving cavity and a relief valve in communication with the receiving cavity; a sealing assembly according to any one of claims 1 to 7, the sealing assembly being connected with the outer shell and covering the relief valve, and the first surface being sealingly arranged between the outer shell. The battery further comprises an electrode located in the receiving cavity, and the relief valve is further configured to inject an electrolyte into the receiving cavity, so that the electrode is soaked in the electrolyte.

9. The battery of claim 8, wherein, ​ 10. The battery of claim 8, wherein, The sealing assembly further comprises a connecting piece, the first surface is connected to the connecting piece, the connecting piece has an avoiding hole, the connecting piece is located in the pressure relief port and is welded to the shell.

Images