A battery, a battery pack, and an electrical device

Abstract

This invention relates to the field of battery technology and discloses a battery, a battery pack, and an electrical device. The battery includes a casing, a core, an elastic insulating base, an insulating element, a first terminal, and a second terminal. The second terminal includes a limiting plate, a connecting post, and a current collector connected along a first direction. The current collector is located on the side of the first terminal away from the core and is embedded in the insulating element. Furthermore, the battery has an auxiliary plane perpendicular to the first direction. The orthographic projection of the insulating element on the auxiliary plane is the first projection, and the orthographic projection of the first terminal on the auxiliary plane is the second projection. The first projection at least partially falls within the second projection. Therefore, when the current collector is subjected to force, the first terminal restricts the insulating element, thereby restricting the current collector from moving towards the casing. That is, with this structure, the second terminal of the battery is not easily moved towards the casing when subjected to force, and the battery structure has high reliability.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery, a battery pack, and an electrical device. Background Technology

[0002] Currently, some cylindrical batteries have an open end along the length of the casing, which is sealed with a rubber plug. The positive and negative terminals are both located on the side of the rubber plug facing away from the inside of the casing. The positive terminal is annular, and the negative terminal is located inside the positive terminal. The two are separated by an annular protrusion on the rubber plug to achieve insulation. In this type of cylindrical battery, because rubber has no rigidity and supporting strength, the negative terminal separated by the annular protrusion on the rubber plug needs to be designed with additional support inside the casing, which complicates the battery structure and reduces reliability. Summary of the Invention

[0003] The primary objective of this invention is to propose a battery with a simple structure and higher reliability.

[0004] To achieve the above objectives, the present invention provides a battery comprising a casing, a winding core, an elastic insulating base, an insulating element, a first terminal, and a second terminal;

[0005] The housing has an opening located at one end of the housing along a first direction;

[0006] The core is disposed inside the housing;

[0007] The outer peripheral surface of the elastic insulating seat abuts against the inner wall surface of the housing and seals the opening. The side of the elastic insulating seat facing away from the core is provided with a mounting groove and a mounting hole. The mounting hole penetrates the elastic insulating seat along the first direction. The mounting groove is annular and the mounting hole is located inside the mounting groove.

[0008] The first terminal is in the shape of an annular plate. The first terminal is disposed in the mounting groove, and the outer peripheral surface of the first terminal is in close contact with the groove side away from its center of the mounting groove. The inner peripheral surface of the first terminal is in contact with the groove side of the mounting groove near its center of the mounting groove. The first terminal is electrically connected to the winding core.

[0009] The second terminal includes a limiting plate, a connecting post, and a current collector. The limiting plate, the connecting post, and the current collector are connected along the first direction. The limiting plate is disposed inside the housing and located between the elastic insulating seat and the winding core. The side of the limiting plate facing away from the winding core is in contact with the elastic insulating seat, and the side of the limiting plate facing away from the elastic insulating seat is electrically connected to the winding core. The connecting post passes through the mounting hole, and the current collector is located on the side of the first terminal away from the winding core.

[0010] The insulating component is placed between the first terminal and the current collector to insulate the first terminal and the current collector.

[0011] The battery has an auxiliary plane perpendicular to the first direction. The orthographic projection of the insulating member onto the auxiliary plane is a first projection, and the orthographic projection of the first terminal onto the auxiliary plane is a second projection. The first projection is at least partially within the second projection.

[0012] In a specific embodiment of the present invention, the orthographic projection of the current collector on the auxiliary plane is a third projection, and the third projection at least partially falls within the second projection.

[0013] In a specific embodiment of the present invention, the insulating member is plate-shaped, and a receiving groove is provided on the side of the insulating member facing away from the first terminal. The bottom surface of the receiving groove is provided with a first clearance hole that extends through the first direction.

[0014] The collector plate is embedded in the receiving groove, and the wall surface of the first clearance hole faces the side surface of the mounting groove near its center.

[0015] In a specific embodiment of the present invention, the length of the collector plate in the first direction is greater than the depth of the receiving groove.

[0016] In a specific embodiment of the present invention, the collector plate is provided with a connecting hole that extends through the first direction, and the collector plate has an annular first connecting protrusion, the first connecting protrusion being located on the hole wall surface of the connecting hole, and the first connecting protrusion being arranged around the axis of the connecting hole;

[0017] The end of the connecting column away from the limiting plate is provided with an annular limiting groove, and the limiting groove is arranged around the axis of the connecting column;

[0018] The connecting post passes through the connecting hole, and the first connecting protrusion is engaged with the limiting groove.

[0019] In a specific embodiment of the present invention, the elastic insulating seat has a first annular slope, the first annular slope connecting the side of the elastic insulating seat facing away from the core to the wall of the mounting hole, and the first annular slope slopes outward from the core to the current collector.

[0020] In a specific embodiment of the present invention, the elastic insulating seat further has a second annular slope, the second annular slope connecting the side of the elastic insulating seat facing away from the core and the side of the mounting groove near its center, and the second annular slope slopes inward from the core to the current collector.

[0021] In a specific embodiment of the present invention, the first terminal includes a first end plate, a second end plate, and a connecting block. The outer edge of the first end plate is circular, and the second end plate has a second clearance hole that extends through the first direction. The first end plate and the second end plate are connected by the connecting block, and a cutout area is defined between the first end plate, the second end plate, and the connecting block. The outer peripheral surface of the first end plate abuts against the outer groove surface of the mounting groove, and the hole wall surface of the second clearance hole abuts against the groove side surface of the mounting groove near its center.

[0022] The hollowed-out area is arranged around the limiting plate;

[0023] When the pressure inside the battery rises to a first preset internal pressure range, the limiting plate, together with the elastic insulating seat, is lifted away from the winding core, causing the connecting block to disconnect. The elastic insulating seat breaks, and at least part of it flips out with the limiting plate to the side of the first end plate away from the winding core.

[0024] In one particular embodiment of the present invention, the insulating element shields the cut-out area.

[0025] In one specific embodiment of the present invention, the number of the connecting blocks is at least one.

[0026] In a particular embodiment of the present invention, at least a portion of the connecting block is provided with a thinning groove on the side facing the core and / or the side facing away from the core.

[0027] In a specific embodiment of the present invention, the thinning groove is connected to the hollowed-out area.

[0028] In a specific embodiment of the present invention, the housing is cylindrical and made of conductive material. The portion of the housing located at the open edge is folded towards the center to form an annular folded edge. The side of the folded edge facing inward is pressed and adhered to the side of the elastic insulating seat facing away from the core. The folded edge is conductively connected to the first terminal, and the first terminal is conductively connected to the core through the housing.

[0029] In a particular embodiment of the present invention, the first terminal has a second connecting protrusion located on the side of the first terminal facing away from the core, and the folded edge is located between the side of the second connecting protrusion facing away from the core and the side of the first terminal facing the core.

[0030] In a specific embodiment of the present invention, the outer edge of the side of the first terminal facing away from the core is provided with an annular first clearance groove, the first clearance groove is arranged around the center of the first terminal, the folded edge extends into the first clearance groove, and the end of the folded edge facing the center side of the housing is at least partially welded to the first terminal.

[0031] In a particular embodiment of the present invention, the side of the first terminal facing the winding core is recessed to form a groove, so that the side of the first terminal facing away from the winding core protrudes to form the second connecting protrusion.

[0032] In a specific embodiment of the present invention, the outer peripheral surface of the housing is bent inward near the opening and a first annular groove around its axis is formed on the outer peripheral surface of the housing, and a third connecting protrusion corresponding to the first annular groove is formed on the inner peripheral surface of the housing. The third connecting protrusion is annular and compresses the outer peripheral surface of the elastic insulating seat, so that the outer peripheral surface of the elastic insulating seat forms a second annular groove around its axis.

[0033] In a specific embodiment of the present invention, the elastic insulating base has a fourth connecting protrusion located on the bottom surface of the mounting groove and embedded in the groove body.

[0034] In a particular embodiment of the present invention, the first terminal has a third clearance hole extending through the first direction;

[0035] The elastic insulating base also has a fifth connecting protrusion, which is located on the bottom surface of the mounting groove and passes through the third clearance hole. The side of the fifth connecting protrusion facing away from the core is provided with an injection hole, which extends from the side of the fifth connecting protrusion facing away from the core to the side of the elastic insulating base facing the core.

[0036] The battery also includes a sealing pin, which is press-fitted against the wall of the injection hole for sealing.

[0037] In a specific embodiment of the present invention, the elastic insulating seat has a sixth connecting protrusion, the sixth connecting protrusion being annular, the sixth connecting protrusion being disposed on the side of the mounting groove away from its center, and being arranged around the axis of the elastic insulating seat;

[0038] The first terminal has a seventh connecting protrusion, which is annular and is disposed on the outer peripheral surface of the first terminal and arranged around its axis.

[0039] The sixth connecting protrusion abuts against the folded edge on the side facing away from the bottom of the mounting groove, and the sixth connecting protrusion abuts against the side of the seventh connecting protrusion facing away from the core. The outer peripheral surface of the first terminal is tightly abutted against the side of the mounting groove away from its center through the seventh connecting protrusion.

[0040] In a particular embodiment of the present invention, the housing further has an explosion-proof structure, which is located on the outer end face of the other end of the housing relative to the opening;

[0041] The battery is depressurized through the explosion-proof structure when it is within the second preset internal pressure range.

[0042] In a specific embodiment of the present invention, the explosion-proof structure includes an explosion-proof groove and an explosion-proof line, wherein the explosion-proof groove is located on the outer wall surface of the housing, and the explosion-proof line is located on the bottom surface of the explosion-proof groove.

[0043] In one specific embodiment of the present invention, the number of explosion-proof structures is at least two, and all the explosion-proof structures are evenly arranged around the center of the housing.

[0044] The present invention also proposes a battery pack, including a housing and a battery as described above, wherein the battery is disposed within the housing.

[0045] The present invention also proposes an electrical device comprising a battery as described above, or a battery pack as described above.

[0046] The present invention provides a battery, a battery pack, and an electrical device, which, compared with the prior art, have the following advantages:

[0047] In the battery of the present invention, the outer peripheral surface of the elastic insulating base is tightly fitted to the inner peripheral surface of the casing and the opening is sealed, resulting in high connection stability between the elastic insulating base and the casing. The outer peripheral surface of the first terminal is tightly fitted to the side of the mounting groove away from its center, resulting in high fixing stability of the first terminal. Therefore, the first terminal is not easily moved toward the casing when subjected to pressure. The current collector of the second terminal is located on the side of the first terminal away from the winding core. Moreover, the first projection of the insulating member on the auxiliary plane at least partially falls within the second projection of the first terminal on the auxiliary plane. Therefore, when the current collector is subjected to pressure, the first terminal will restrict the insulating member, thereby restricting the current collector from moving toward the casing. That is, in this type of battery structure, neither the first terminal nor the second terminal is easily moved toward the casing when subjected to force, resulting in high structural reliability of the battery. Attached Figure Description

[0048] Figure 1 This is a perspective view of the battery according to an embodiment of the present invention;

[0049] Figure 2 This is a perspective view of the battery from another angle according to an embodiment of the present invention;

[0050] Figure 3 This is a perspective view of the housing according to an embodiment of the present invention;

[0051] Figure 4 This is a cross-sectional view of the battery according to an embodiment of the present invention;

[0052] Figure 5 This is an embodiment of the present invention. Figure 4 Enlarged diagram of A in the middle;

[0053] Figure 6 This is an embodiment of the present invention. Figure 5 Enlarged diagram of B in the middle;

[0054] Figure 7 This is an embodiment of the present invention. Figure 5 Enlarged diagram of C in the middle;

[0055] Figure 8 This is a schematic diagram showing the relationship between the first projection and the second projection in an embodiment of the present invention;

[0056] Figure 9 This is a schematic diagram showing the relationship between the second and third projections in an embodiment of the present invention;

[0057] Figure 10 This is a perspective view of the first terminal in an embodiment of the present invention;

[0058] Figure 11 This is a perspective view of the first terminal from another angle in an embodiment of the present invention;

[0059] Figure 12 This is a perspective view of the second terminal in an embodiment of the present invention;

[0060] Figure 13 This is a perspective view of the insulating component according to an embodiment of the present invention;

[0061] Figure 14 This is a perspective view of the elastic insulating base according to an embodiment of the present invention.

[0062] In the diagram, 1. Shell; 101. Opening; 102. First annular groove; 11. Folded edge; 12. Third connecting protrusion; 2. Core; 3. Elastic insulating base; 301. Mounting groove; 302. Mounting hole; 303. First annular slope; 304. Second annular slope; 305. Second annular groove; 31. Fourth connecting protrusion; 32. Fifth connecting protrusion; 3201. Liquid injection hole; 33. Sixth connecting protrusion; 4. Insulating component; 401. Receiving groove; 402. First clearance hole; 41. Covering part; 5. First terminal; 501. Cutout area; 502. First clearance groove; 5 03. Groove; 504. Third clearance hole; 51. First end plate; 52. Second end plate; 5201. Second clearance hole; 53. Connecting block; 5301. Thinning groove; 54. Second connecting protrusion; 55. Seventh connecting protrusion; 6. Second terminal; 61. Limiting plate; 62. Connecting post; 6201. Limiting groove; 63. Collector plate; 6301. Connecting hole; 631. First connecting protrusion; 7. Sealing nail; 8. Explosion-proof structure; 81. Explosion-proof groove; 82. Explosion-proof line; 100. Auxiliary plane; 200. First projection; 300. Second projection; 400. Third projection. Detailed Implementation

[0063] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0064] 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," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships 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. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0065] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] This application proposes an electrical device, including a battery pack or a battery described below, wherein the battery pack and the battery are used to supply power to the electrical device, and the electrical device may include, but is not limited to, a backup power supply, an electric vehicle, an electric bicycle, an electric motorcycle, etc.

[0068] In addition, this application also proposes a battery pack, which includes a housing and the battery described above, and the battery pack can be used in the aforementioned electrical equipment.

[0069] like Figures 1 to 14As shown, a preferred embodiment of the present invention provides a battery comprising a casing 1, a core 2, an elastic insulating seat 3, an insulating element 4, a first terminal 5, and a second terminal 6. The casing 1 is cylindrical, with its axial direction being a first direction X. The casing 1 has an opening 101 located at one end along its length. The core 2 is disposed within the casing 1. The outer peripheral surface of the elastic insulating seat 3 is tightly connected to the inner wall of the casing 1, sealing the opening 101. The side of the elastic insulating seat 3 facing away from the core 2 has a mounting groove 301 and a mounting hole 302. The mounting hole 302 penetrates the elastic insulating seat 3 along the first direction X. The mounting groove 301 is annular, and the mounting hole 302 is located inside the mounting groove 301. The first terminal 5 is annular and plate-shaped. The first terminal 5 is disposed in the mounting groove 301, and the outer peripheral surface of the first terminal 5 is tightly fitted against the groove side of the mounting groove 301 away from its center. The inner peripheral surface of the first terminal 5 is fitted against the groove side of the mounting groove 301 near its center. The first terminal 5 and the core... 2. Conductive connection; the second terminal 6 includes a limiting plate 61, a connecting post 62, and a current collector 63. The limiting plate 61, the connecting post 62, and the current collector 63 are connected along the first direction X. The limiting plate 61 is disposed inside the housing 1 and is located between the elastic insulating seat 3 and the core 2. The side of the limiting plate 61 facing away from the core 2 is in contact with the elastic insulating seat 3, and the side of the limiting plate 61 facing away from the elastic insulating seat 3 is conductively connected to the core 2. The connecting post 62 passes through the mounting hole 302 and is interference-fitted with the hole wall of the mounting hole 302. The current collector 63 is located on the side of the first terminal 5 away from the core 2; the insulating member 4 is placed between the first terminal 5 and the current collector 63 to insulate the first terminal 5 and the current collector 63; wherein, the battery has an auxiliary plane 100 perpendicular to the first direction X, the orthographic projection of the insulating member 4 on the auxiliary plane 100 is the first projection 200, the orthographic projection of the first terminal 5 on the auxiliary plane 100 is the second projection 300, and the first projection 200 at least partially falls within the second projection 300.

[0070] In the battery of this application, the outer peripheral surface of the elastic insulating base 3 is tightly fitted to the inner peripheral surface of the housing 1 and the opening 101 is sealed. The connection stability between the elastic insulating base 3 and the housing 1 is relatively high. The outer peripheral surface of the first terminal 5 is tightly fitted to the side of the mounting groove 301 away from its center. The fixing stability of the first terminal 5 is relatively high. Therefore, the first terminal 5 is not easy to move towards the housing 1 when subjected to force. The current collector 63 of the second terminal 6 is located on the side of the first terminal 5 away from the core 2. Moreover, the first projection 200 of the insulating member 4 on the auxiliary plane 100 at least partially falls into the second projection 300 of the first terminal 5 on the auxiliary plane 100. Therefore, when the current collector 63 is subjected to force, the first terminal 5 will restrict the insulating member 4, thereby restricting the current collector 63 from moving towards the housing 1. That is, in this battery structure, the first terminal 5 and the second terminal 6 are not easy to move towards the housing 1 when subjected to force, and the battery structure has high reliability.

[0071] In this application, the first terminal 5 is electrically connected to the positive electrode of the core 2, and the second terminal 6 is electrically connected to the negative electrode of the core 2. Both the first terminal 5 and the second terminal 6 are made of conductive materials. Specifically, the side of the limiting plate 61 facing away from the elastic insulating seat 3 is electrically connected to the core 2 through the first current collector, which is disposed inside the housing 1.

[0072] In this application, the orthographic projection of the current collector 63 onto the auxiliary plane 100 is a third projection 400, and the third projection 400 at least partially falls within the second projection 300; for example, as shown... Figure 12 As shown, the manifold 63 is a circular plate. This type of manifold 63 is easy to process, and the outer diameter of the manifold 63 is larger than the inner diameter of the first terminal 5. Figure 9 As shown, the outer edge of the third projection 400 falls within the second projection 300. As a preferred embodiment of this application, the strength of the current collector 63 is higher than that of the insulating member 4. Therefore, when the current collector 63 is subjected to force, the main force transmitted to the insulating member 4 is pressure rather than shear force. Since the strength of the insulating member 4 is relatively lower than that of the current collector 63, the insulating member 4 can withstand the force applied to the current collector 63 more effectively. The first terminal 5 can better restrict the current collector 63 from moving toward the housing 1, which can further improve the structural reliability of the battery.

[0073] like Figure 13 As shown, the insulating member 4 is plate-shaped, and a receiving groove 401 is provided on the side of the insulating member 4 facing away from the first terminal 5. The bottom surface of the receiving groove 401 is provided with a first clearance hole 402 penetrating along the first direction X; wherein, as Figure 5 As shown, the current collector 63 is embedded in the receiving groove 401, and the wall surface of the first clearance hole 402 faces the side surface of the mounting groove 301 near its center. The current collector 63 is embedded in the receiving groove 401, meaning that the current collector 63 is located in the receiving groove 401, and the side of the current collector 63 facing the core 2 is in contact with the bottom surface of the receiving groove 401. The outer peripheral surface of the current collector 63 is in contact with the side surface of the receiving groove 401. At this time, the insulating member 4 covers at least one end of the current collector 63 facing the core 2. The insulating member 4 with this structure achieves insulation between the current collector 63 and the first terminal 5. The insulating member 4 can effectively isolate the current collector 63 and the first terminal 5, and the insulation effect is good.

[0074] Optional, such as Figure 5As shown, the length of the current collector 63 in the first direction X is greater than the depth of the receiving groove 401. That is, at least part of the end of the current collector 63 away from the core 2 is exposed from the opening of the receiving groove 401. This facilitates the connection of the current collector 63 with external conductive components. For example, when the battery is used in a battery pack, both the first terminal 5 of the battery and the current collector 63 need to be connected to the corresponding busbar. In this case, at least part of the current collector 63 is exposed from the opening of the receiving groove 401, which makes it easier for workers to weld the busbar onto the current collector 63, and the processing is convenient.

[0075] In this application, as Figure 5 and Figure 6 As shown, the collector plate 63 has a connecting hole 6301 extending along the first direction X. The collector plate 63 has an annular first connecting protrusion 631, which is located on the wall of the connecting hole 6301 and is arranged around the axis of the connecting hole 6301. The end of the connecting post 62 away from the limiting plate 61 has an annular limiting groove 6201, which is arranged around the axis of the connecting post 62. The connecting post 62 passes through the connecting hole 6301, and the first connecting protrusion 631 is engaged with the limiting groove 6201. Specifically, the connecting post 62 and the collector plate 63 are connected by riveting. Before riveting the connecting post 62 to the collector plate 63, the connecting post 62 has a certain opening. The battery consists of a first column segment and a second column segment. The first column segment is connected to the limiting plate 61, and its outer diameter is larger than that of the second column segment. When the connecting column 62 and the current collector plate 63 are ready to be riveted, the second column segment passes through the connecting hole 6301 and the inner side of the first connecting protrusion 631. After the connecting column 62 and the current collector plate 63 are riveted, the second column segment is deformed under pressure, and the outer diameter of the part that extends beyond the connecting hole 6301 becomes larger. This part forms the limiting groove 6201 with the first column segment, and the first connecting protrusion 631 is engaged with the limiting groove 6201. This method achieves the connection between the current collector plate 63 and the connecting column 62, which is convenient to process and has high connection stability, thus improving the structural reliability of the battery. After riveting, the connecting column 62 and the current collector plate 63 are welded at the junction away from the winding core, further ensuring better conductivity between them.

[0076] Optional, such as Figure 6 and Figure 14As shown, the elastic insulating seat 3 has a first annular slope 303. The first annular slope 303 connects the side of the elastic insulating seat 3 facing away from the core 2 and the wall of the mounting hole 302. The first annular slope 303 slopes outward from the core 2 to the current collector plate 63. Specifically, as mentioned above, the connecting post 62 and the current collector plate 63 are connected by riveting. Before riveting and during the assembly of the connecting post 62 and the current collector plate 63, the presence of the first annular slope 303 can prevent part of the elastic insulating seat 3 from being clamped between the first post segment and the first connecting protrusion 631. This avoids the deterioration of the riveting connection strength and conductivity caused by part of the elastic insulating seat 3 being clamped during the riveting process, and also avoids sparking during the welding process after riveting, thus improving the processing quality of the battery.

[0077] Furthermore, such as Figure 14 As shown, the elastic insulating base 3 also has a second annular slope 304. The second annular slope 304 connects the side of the elastic insulating base 3 facing away from the core 2 and the side of the mounting groove 301 near its center. The second annular slope 304 slopes inward from the core 2 to the current collector 63. Since the side of the mounting groove 301 near its center is in contact with the inner circumferential surface of the first terminal 5, the side of the mounting groove 301 near its center is annular. The outer diameter of the part that contacts the first terminal 5 is the first outer diameter. The first outer diameter is similar to the inner diameter of the first terminal 5. That is, the outer diameter of the second annular slope 304 gradually decreases from bottom to top. Based on this, the second annular slope 304 plays a guiding and avoidance role during the assembly of the first terminal 5 into the mounting groove 301, making it convenient to assemble the first terminal 5 with the elastic insulating base 3.

[0078] In practical applications, batteries will undergo violent internal reactions under conditions such as short circuit, overcharge, or continuous heating leading to thermal runaway, which will generate a large amount of gas. Especially when the battery experiences thermal runaway, it will generate gas rapidly in a short period of time, and the internal pressure will surge instantly. At this time, it is necessary to release the gas inside the battery in time to relieve pressure and thus prevent the battery from exploding.

[0079] In this application, as Figure 1 , Figure 10 and Figure 11As shown, the first terminal 5 includes a first end plate 51, a second end plate 52, and a connecting block 53. The outer edge of the first end plate 51 is circular, and the second end plate 52 has a second clearance hole 5201 extending along the first direction X. The first end plate 51 and the second end plate 52 are connected by the connecting block 53, and a cutout area 501 is defined between the first end plate 51, the second end plate 52, and the connecting block 53. The outer peripheral surface of the first end plate 51 abuts against the outer groove surface of the mounting groove 301. The hole wall of hole 5201 is fitted to the side of mounting groove 301 near its center. Specifically, the first end plate 51 has a through hole extending along the first direction X, the second end plate 52 is located within the through hole, and the connecting block 53 connects the outer peripheral surface of the second end plate 52 and the hole wall of the through hole. The outer peripheral surface of the first end plate 51 forms the outer peripheral surface of the first terminal 5, and the hole wall of the second clearance hole 5201 forms the inner peripheral surface of the first terminal 5. The outer peripheral surface of the second end plate 52, the hole wall of the through hole, and the connecting block 53... The side of block 53 defines the aforementioned cutout area 501; wherein, the cutout area 501 is arranged around the limiting plate 61; when the pressure inside the battery rises to the first preset internal pressure range, the limiting plate 61, together with the elastic insulating seat 3, is lifted away from the core 2 and at least part of the connecting block 53 is disconnected, the second end plate 52 is at least partially separated from the first end plate 51, the elastic insulating seat 3 breaks, and at least part of it flips out with the limiting plate 61 to the side of the first end plate 51 away from the core 2. In this type of battery structure, the elastic insulating seat 3 is flexible, and the setting of the cutout area 501 reduces the connection strength between the first end plate 51 and the second end plate 52. Its advantage is that when the pressure inside the battery rises to the first preset air pressure, the elastic insulating seat 3 will be torn by the limiting plate 61 under the action of air pressure. As a result, the range of the mounting hole 302 will be expanded, and the gas inside the battery can be quickly discharged from the torn area to achieve the purpose of rapid pressure relief. Based on this, the battery will not be cracked, and the battery explosion and fire can be avoided.

[0080] The aforementioned first preset pressure is the explosion-proof pressure relief pressure of the battery, which is determined according to the actual application, and will not be elaborated upon in this application.

[0081] Furthermore, such as Figure 10 and Figure 11 As shown, there are two connecting blocks 53, which are located on opposite sides of the second clearance hole 5201. The first end plate 51 and the second end plate 52 are connected by the two connecting blocks 53, which can improve the overall strength of the first terminal 5 and ensure the structural reliability of the battery. Of course, the number of connecting blocks 53 can be one, three or more, and this application does not limit this. When there are multiple connecting blocks 53, there are also multiple hollow areas 501. Multiple hollow areas 501 are arranged around the second clearance hole 5201. The first terminal 5 with this structure can also ensure that the limiting plate 61 can be flipped out to the side of the first end plate 51 away from the core 2 when the first preset air pressure is applied.

[0082] Optional, such as Figure 10 As shown, the side of the connecting block 53 facing away from the core 2 is provided with a thinning groove 5301. Preferably, the thinning groove 5301 is connected to the hollow area 501. The setting of the thinning groove 5301 reduces the thickness of the connecting block 53. As a result, when the battery is under the first preset air pressure, the connecting block 53 is more likely to break under the air pressure, so that the second end plate 52 can be flipped up under the first preset air pressure.

[0083] In other embodiments, the thinning groove 5301 is provided only on the side of the connecting block 53 facing the core 2, or the thinning groove 5301 is provided on both the side of the connecting block 53 facing the core 2 and the side facing away from the core 2. This also enables the connecting block 53 to have the characteristic of being easy to break under air pressure.

[0084] In this application, as Figure 1 , Figure 3 and Figure 5 As shown, the casing 1 is made of conductive material. The portion of the casing 1 located at the edge of the opening 101 is folded towards the center to form an annular folded edge 11. The side of the folded edge 11 facing inwards from the casing 1 is pressed tightly against the side of the elastic insulating seat 3 facing away from the core 2. The folded edge 11 is conductively connected to the first terminal 5. The first terminal 5 is conductively connected to the core 2 through the casing 1. The folded edge 11 is connected to the first end plate 51 of the first terminal 5 by welding. This allows the first terminal 5 to be more stably positioned on the elastic insulating seat 3. As a result, the first terminal 5 is less likely to move towards the inside of the casing 1 when subjected to force. This better restricts the movement of the current collector 63 towards the inside of the casing 1 when subjected to force. Based on this, the battery has higher structural reliability. Specifically, the casing 1 and the core 2 are conductively connected through a second current collector, which is located inside the casing 1.

[0085] As mentioned above, when the battery is used in a battery pack, the first terminal 5 needs to be connected to the corresponding busbar. Typically, the busbar is welded to the side of the first terminal 5 facing away from the core 2. However, in this application, the housing 1 is connected to the first terminal 5 via a folded edge 11. During battery production, it is difficult to ensure that the folded edge 11 is flush with the side of the first terminal 5 facing away from the core 2. Therefore, if the busbar is welded to the side of the first terminal 5 facing away from the core 2, the folded edge 11 may easily lift the busbar, leading to poor contact between the first terminal 5 and the busbar, resulting in poor welding and low battery electrical connection reliability. Therefore, in this application, if... Figure 1 and Figure 10As shown, the first terminal 5 has a second connecting protrusion 54, which is located on the side of the first terminal 5 facing away from the core 2. The folded edge 11 is located between the side of the second connecting protrusion 54 facing away from the core 2 and the side of the first terminal 5 facing the core 2. The side of the second connecting protrusion 54 facing away from the core 2 is used for welding to the busbar. Since the folded edge 11 is located between the side of the second connecting protrusion 54 facing away from the core 2 and the side of the first terminal 5 facing the core 2, the side of the folded edge 11 facing away from the core 2 is not higher than the side of the second connecting protrusion 54 facing away from the core 2. Therefore, after the busbar is welded to the second connecting protrusion 54, the folded edge 11 will not push up the busbar. The welding reliability between the second connecting protrusion 54 and the busbar is high, and there will be no welding defects. Thus, when the battery is used in a battery pack, its electrical connection reliability is high.

[0086] Optional, such as Figure 5 and Figure 10 As shown, the outer edge of the side of the first terminal 5 facing away from the winding core 2 is provided with an annular first clearance groove 502. The first clearance groove 502 is arranged around the center of the first terminal 5. The folded edge 11 extends into the first clearance groove 502. As a result, the distance between the side of the folded edge 11 facing away from the winding core 2 and the side of the second connecting protrusion 54 facing away from the winding core 2 is larger, which can better prevent the folded edge 11 from pushing up the busbar and further ensure the reliability of the electrical connection between the battery and the busbar. In addition, when the housing 1 is folded to form the folded edge 11, the first clearance groove 502 provides a certain clearance space, so that the folded edge 11 has sufficient bending degree, so that the folded edge 11 can be folded to the state of being connected to the first terminal 5.

[0087] In this application, as Figure 5 , Figure 7 and Figure 11 As shown, the first terminal 5 is recessed on the side facing the winding core 2 to form a groove 503, so that the side of the first terminal 5 facing away from the winding core 2 protrudes to form a second connecting protrusion 54. That is, the first terminal 5 and the second connecting protrusion 54 are an integral structure. In practical applications, the first terminal 5 is stamped to form the second connecting protrusion 54, thereby forming the groove 503. Specifically, the first terminal 5 and the second connecting protrusion 54 are formed by stamping. The process is simple, convenient and low cost. The battery has the characteristics of low processing difficulty and low processing cost.

[0088] like Figure 1 , Figure 2 and Figure 5As shown, the outer peripheral surface of the housing 1 is curved inward near the opening 101, forming a first annular groove 102 around its axis on the outer peripheral surface of the housing 1. A third connecting protrusion 12 corresponding to the first annular groove 102 is formed on the inner peripheral surface of the housing 1. The third connecting protrusion 12 is annular and compresses the outer peripheral surface of the elastic insulating seat 3, so that the outer peripheral surface of the elastic insulating seat 3 forms a second annular groove 305 around its axis. Specifically, the housing 1 is processed by a roller groove process to form the first annular groove 102. At the same time as the first annular groove 102 is formed, the inner peripheral surface of the housing 1 protrudes to form the third connecting protrusion 12. At the same time as the third connecting protrusion 12 is formed, the outer peripheral surface of the elastic insulating seat 3 is concave to form the second annular groove 305. This method fixes the elastic insulating seat 3 inside the housing 1. The structure is simple, the processing is convenient, the elastic insulating seat 3 is stably arranged, and a sealing part is formed between the outer peripheral surface of the elastic insulating seat 3 and the inner wall surface of the housing 1. The two have strong sealing performance to meet the sealing requirements for normal use of the battery.

[0089] Preferably, in the axial direction of the housing 1, the third connecting protrusion 12 is located on the side of the first terminal 5 away from the folded edge 11. At this time, the third connecting protrusion 12 and the folded edge 11 will press and fix the first terminal 5 together. Thus, the first terminal 5 can be well fixed and has very high stability. Therefore, the first terminal 5 is less likely to move into the housing 1 when subjected to force, thereby better restricting the current collector 63 from moving into the housing 1 when subjected to force. Based on this, the first terminal 5 and the second terminal 6 are not easy to move into the housing 1 when subjected to force, and the battery has higher structural reliability.

[0090] In addition, during battery processing, the elastic insulating seat 3 is first placed inside the housing 1, and then the housing 1 is processed sequentially or simultaneously to form the first annular groove 102 and the folded edge 11. During the forming process, the first annular groove 102 and the folded edge 11 will squeeze the elastic insulating seat 3. Since the elastic insulating seat 3 is elastic, it will have a tendency to elastically recover after being deformed by pressure. Based on this tendency, the side of the elastic insulating seat 3 facing away from the core 2 will be tightly attached to the folded edge 11, and the outer peripheral surface of the insulating seat will be tightly attached to the inner peripheral surface of the housing 1. Based on this, the battery has the characteristic of good sealing effect.

[0091] However, since the groove 503 is provided on the side of the first terminal 5 facing the core 2, during the molding process of the first annular groove 102, the elastic insulating seat 3 is squeezed and part of it deforms and is squeezed into the groove 503. This causes the outer wall surface of the elastic insulating seat 3 to not fit well against the inner wall surface of the housing 1, which will affect the sealing performance of the battery. Based on this, in this application, as Figure 5 , Figure 7 and Figure 14As shown, the elastic insulating seat 3 has a fourth connecting protrusion 31, which is located on the bottom surface of the mounting groove 301. The fourth connecting protrusion 31 is embedded in the groove 503, that is, the fourth connecting protrusion 31 fills the groove 503. Therefore, during the grooving process of the housing 1, when the elastic insulating seat 3 is subjected to pressure, the deformation of the part of the elastic insulating seat 3 corresponding to the groove 503 is relatively small, and the outer peripheral surface of the elastic insulating seat 3 can fit well against the inner wall surface of the housing 1. Based on this, the battery has the characteristic of good sealing performance.

[0092] In this application, as Figure 10 and Figure 11 As shown, the first terminal 5 has a third clearance hole 504 extending through the first direction X; as Figure 14 As shown, the elastic insulating base 3 also has a fifth connecting protrusion 32, which is located on the bottom surface of the mounting groove 301. The side of the fifth connecting protrusion 32 facing away from the core 2 has an injection hole 3201, which extends from the side of the fifth connecting protrusion 32 facing away from the core 2 to the side of the elastic insulating base 3 facing the core 2. Figure 5 As shown, the fifth connecting protrusion 32 passes through the third clearance hole 504; the battery also includes a sealing pin 7, which is press-fitted to the wall of the injection hole 3201 for sealing; in practical applications, the injection hole 3201 is used to inject electrolyte into the housing 1, and the function of the sealing pin 7 is to seal the injection hole 3201 after the battery has been filled with electrolyte. Since the elastic insulating seat 3 is elastic, the sealing pin 7 can be press-fitted to the injection hole 3201, which is convenient to assemble and provides a good sealing effect.

[0093] Preferably, the insulating member 4 shields the hollowed-out area 501. For example, the insulating member 4 has a shielding portion 41 that shields the hollowed-out area 501. This structure prevents electrolyte from entering the hollowed-out area 501 during battery filling, thereby preventing battery contamination. In other embodiments, the insulating member 4 does not have a shielding portion 41. In this case, the insulating member 4 is a plate with a receiving groove 401, and the side of the insulating member 4 that is in contact with the first terminal 5 directly shields the hollowed-out area 501.

[0094] like Figure 14 As shown, the elastic insulating base 3 has a sixth connecting protrusion 33, which is annular and located on the side of the mounting groove 301 away from its center, and is arranged around the axis of the elastic insulating base 3; as Figure 10 As shown, the first terminal 5 has a seventh connecting protrusion 55, which is annular and disposed on the outer peripheral surface of the first terminal 5 and arranged around its axis; wherein, as Figure 7As shown, the side of the sixth connecting protrusion 33 facing away from the bottom surface of the mounting groove 301 abuts against the folded edge 11, and the side of the sixth connecting protrusion 33 facing the bottom surface of the mounting groove 301 abuts against the side of the seventh connecting protrusion 55 facing away from the core 2. The outer peripheral surface of the first terminal 5 is tightly abutted against the side of the mounting groove 301 away from its center through the seventh connecting protrusion 55. Specifically, the folded edge 11 presses the sixth connecting protrusion 33 onto the seventh connecting protrusion 55, while the third connecting protrusion 12 can also play the role of supporting the first terminal 5. The cooperation of the folded edge 11 and the third connecting protrusion 12 can make the first terminal 5 more stably arranged on the elastic insulating base 3, thereby making the battery structure more reliable. In addition, since the first terminal 5 is stably arranged on the elastic insulating base 3, the first terminal 5 will not move towards the inside of the housing 1 when subjected to force. Therefore, when the current collector 63 is subjected to force, the first terminal 5 will restrict the current collector 63 from moving towards the inside of the housing 1, and the battery structure has higher reliability.

[0095] In this application, the battery achieves explosion-proof pressure relief by tearing the elastic insulating seat 3 through the aforementioned limiting plate 61. Although this method can achieve rapid pressure relief, if the battery generates gas violently in extreme situations, due to the battery's certain length, it takes time for the gas at the bottom of the battery to travel to the aforementioned torn area at the top for discharge. This time difference can cause the casing 1 to be ruptured by the gas, leading to an explosion and fire. Therefore, in this application, the battery casing 1 also has an explosion-proof structure 8, which is located on the outer end face of the other end of the casing 1 relative to the opening 101. Under the second preset internal pressure range, the battery is protected against explosion. The explosion-proof structure 8 releases pressure, wherein the first preset internal pressure range and the second preset internal pressure range are not limited in magnitude. Within the first preset internal pressure range, gas will cause the limiting plate 61 to tear the elastic insulating seat 3 and exit from the tear area. Within the second preset internal pressure range, the battery is depressurized through the explosion-proof structure 8. For example, the first preset internal pressure range is greater than the second preset internal pressure range. Therefore, when the battery violently generates gas and reaches the first preset internal pressure, the gas inside will cause the limiting plate 61 to tear the elastic insulating seat 3 and exit from the tear area. If the gas pressure inside the battery reaches the second preset internal pressure range, the gas inside will further break through the explosion-proof structure 8, i.e., if... Figure 1 As shown in the diagram, when the battery generates gas violently, the gas inside the battery can be quickly discharged in both directions from the top tear area and the bottom explosion-proof structure at point 8. The battery can be depressurized quickly, ensuring that the battery will not be cracked by the gas, thus ensuring good battery safety.

[0096] Optionally, the explosion-proof structure 8 and the housing 1 are an integral structure, such as... Figure 2As shown, the explosion-proof structure 8 includes an explosion-proof groove 81 and an explosion-proof line 82. The explosion-proof groove 81 is located on the outer wall surface of the shell 1, and the explosion-proof line 82 is located on the bottom surface of the groove 81. This type of explosion-proof structure 8 has a simple structure and is easy to process. For example, the explosion-proof groove 81 is elliptical, and the explosion-proof line 82 is also elliptical. The explosion-proof line 82 forms an explosion-proof area. This type of explosion-proof structure has high uniformity in shell dimensions.

[0097] Furthermore, the number of explosion-proof structures 8 is at least two, and all explosion-proof structures 8 are evenly arranged around the center of the housing 1. This helps to further improve the uniformity of the housing dimensions and improve the battery's venting efficiency. An exemplary example has three explosion-proof structures 8.

[0098] In this invention, the material of the elastic insulating base 3 can be one of fluororubber, ethylene propylene rubber, butyl rubber, nitrile rubber, polypropylene modified rubber, chlorinated nitrile rubber, chloroprene rubber and isoprene rubber, or a composite containing the rubbers. This invention does not limit the material.

[0099] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A battery, characterized in that, Includes housing (1), core (2), elastic insulating base (3), insulating component (4), first terminal (5), and second terminal (6); The housing (1) has an opening (101) located at one end of the housing (1) along a first direction (X); The core (2) is disposed inside the housing (1); The outer peripheral surface of the elastic insulating seat (3) abuts against the inner wall of the housing (1) and seals the opening (101). The side of the elastic insulating seat (3) facing away from the core (2) is provided with a mounting groove (301) and a mounting hole (302). The mounting hole (302) penetrates the elastic insulating seat (3) along the first direction (X). The mounting groove (301) is annular, and the mounting hole (302) is located inside the mounting groove (301). Both the first terminal (5) and the second terminal (6) are made of conductive material. The first terminal (5) is in the shape of an annular plate. The first terminal (5) is disposed in the mounting groove (301), and the outer peripheral surface of the first terminal (5) is in close contact with the side of the mounting groove (301) away from its center. The inner peripheral surface of the first terminal (5) is in contact with the side of the mounting groove (301) near its center. The first terminal (5) is electrically connected to the winding core (2). The second terminal (6) includes a limiting plate (61), a connecting post (62), and a current collector (63). The limiting plate (61), the connecting post (62), and the current collector (63) are connected along the first direction (X). The limiting plate (61) is disposed inside the housing (1) and located between the elastic insulating seat (3) and the core (2). The side of the limiting plate (61) facing away from the core (2) is in contact with the elastic insulating seat (3). The side of the limiting plate (61) facing away from the elastic insulating seat (3) is electrically connected to the core (2). The connecting post (62) passes through the mounting hole (302). The current collector (63) is located on the side of the first terminal (5) away from the core (2). The insulating element (4) is placed between the first terminal (5) and the current collector (63) to insulate the first terminal (5) and the current collector (63); The battery has an auxiliary plane (100) perpendicular to the first direction (X). The orthographic projection of the insulating member (4) on the auxiliary plane (100) is a first projection (200), and the orthographic projection of the first terminal (5) on the auxiliary plane (100) is a second projection (300). The first projection (200) is at least partially within the second projection (300). The orthographic projection of the current collector (63) on the auxiliary plane (100) is a third projection (400), and the third projection (400) is at least partially within the second projection (300).

2. The battery according to claim 1, characterized in that, The insulating member (4) is plate-shaped, and a receiving groove (401) is provided on the side of the insulating member (4) facing away from the first terminal (5). The bottom surface of the receiving groove (401) is provided with a first clearance hole (402) that passes through the first direction (X). The collector plate (63) is embedded in the receiving groove (401), and the hole wall of the first clearance hole (402) faces the side of the mounting groove (301) near its center.

3. The battery according to claim 2, characterized in that, The length dimension of the collector plate (63) in the first direction (X) is greater than the depth dimension of the receiving groove (401).

4. The battery according to claim 1, characterized in that, The collector plate (63) is provided with a connecting hole (6301) that extends through the first direction (X). The collector plate (63) has an annular first connecting protrusion (631). The first connecting protrusion (631) is located on the hole wall of the connecting hole (6301), and the first connecting protrusion (631) is arranged around the axis of the connecting hole (6301). The connecting column (62) has an annular limiting groove (6201) at one end away from the limiting plate (61), and the limiting groove (6201) is arranged around the axis of the connecting column (62). The connecting post (62) passes through the connecting hole (6301), and the first connecting protrusion (631) is engaged with the limiting groove (6201).

5. The battery according to claim 1, characterized in that, The elastic insulating seat (3) has a first annular slope (303), which connects the side of the elastic insulating seat (3) facing away from the core (2) to the wall of the mounting hole (302), and the first annular slope (303) is inclined outward from the core (2) to the collector plate (63).

6. The battery according to claim 1, characterized in that, The elastic insulating seat (3) also has a second annular slope (304), which connects the side of the elastic insulating seat (3) facing away from the core (2) to the side of the mounting groove (301) near its center, and the second annular slope (304) is inclined inward from the core (2) to the collector plate (63).

7. The battery according to claim 1, characterized in that, The first terminal (5) includes a first end plate (51), a second end plate (52) and a connecting block (53). The outer edge of the first end plate (51) is circular. The second end plate (52) has a second clearance hole (5201) that passes through the first direction (X). The first end plate (51) and the second end plate (52) are connected by the connecting block (53). A hollow area (501) is defined between the first end plate (51), the second end plate (52) and the connecting block (53). The outer peripheral surface of the first end plate (51) is in close contact with the outer groove surface of the mounting groove (301). The hole wall surface of the second clearance hole (5201) is in close contact with the groove side surface of the mounting groove (301) near its center. The hollowed-out area (501) is arranged around the limiting plate (61); When the pressure inside the battery rises to the first preset internal pressure range, the limiting plate (61) together with the elastic insulating seat (3) is pushed up against the core (2) and the connecting block (53) is disconnected. The elastic insulating seat (3) breaks and at least part of it flips out with the limiting plate (61) to the side of the first end plate (51) away from the core (2).

8. The battery according to claim 7, characterized in that, The insulating element (4) shields the hollowed-out area (501).

9. The battery according to claim 7, characterized in that, The number of the connecting blocks (53) is at least one.

10. The battery according to claim 9, characterized in that, At least a portion of the connecting block (53) has a thinning groove (5301) on the side facing the core (2) and / or the side facing away from the core (2).

11. The battery according to claim 10, characterized in that, The thinning groove (5301) is connected to the hollowed-out area (501).

12. The battery according to claim 1, characterized in that, The housing (1) is cylindrical and made of conductive material. The portion of the housing (1) located at the edge of the opening (101) is folded towards the center to form an annular folded edge (11). The side of the folded edge (11) facing the inside of the housing (1) is pressed and adhered to the side of the elastic insulating seat (3) facing away from the core (2). The folded edge (11) is electrically connected to the first terminal (5). The first terminal (5) is electrically connected to the core (2) through the housing (1).

13. The battery according to claim 12, characterized in that, The first terminal (5) has a second connecting protrusion (54) located on the side of the first terminal (5) facing away from the core (2), and the folded edge (11) is located between the side of the second connecting protrusion (54) facing away from the core (2) and the side of the first terminal (5) facing the core (2).

14. The battery according to claim 13, characterized in that, The outer edge of the side of the first terminal (5) facing away from the core (2) is provided with an annular first clearance groove (502). The first clearance groove (502) is arranged around the center of the first terminal (5). The folded edge (11) extends into the first clearance groove (502). The end of the folded edge (11) facing the center side of the housing (1) is at least partially welded to the first terminal (5).

15. The battery according to claim 13, characterized in that, The first terminal (5) is recessed on the side facing the core (2) to form a groove (503), so that the side of the first terminal (5) facing away from the core (2) protrudes to form the second connecting protrusion (54).

16. The battery according to claim 15, characterized in that, The outer peripheral surface of the housing (1) is bent inward near the opening (101) and a first annular groove (102) is formed around its axis on the outer peripheral surface of the housing (1). A third connecting protrusion (12) corresponding to the first annular groove (102) is formed on the inner peripheral surface of the housing (1). The third connecting protrusion (12) is annular and compresses the outer peripheral surface of the elastic insulating seat (3), so that the outer peripheral surface of the elastic insulating seat (3) forms a second annular groove (305) around its axis.

17. The battery according to claim 16, characterized in that, The elastic insulating base (3) has a fourth connecting protrusion (31), which is located on the bottom surface of the mounting groove (301) and is embedded in the groove body (503).

18. The battery according to claim 1, characterized in that, The first terminal (5) has a third clearance hole (504) extending through the first direction (X). The elastic insulating base (3) also has a fifth connecting protrusion (32), which is located on the bottom surface of the mounting groove (301) and passes through the third clearance hole (504). The side of the fifth connecting protrusion (32) facing away from the core (2) is provided with an injection hole (3201), which extends from the side of the fifth connecting protrusion (32) facing away from the core (2) to the side of the elastic insulating base (3) facing the core (2). The battery also includes a sealing pin (7), which is press-fitted against the wall of the injection hole (3201) for sealing.

19. The battery according to claim 12, characterized in that, The elastic insulating seat (3) has a sixth connecting protrusion (33), which is annular and located on the side of the mounting groove (301) away from its center, and is arranged around the axis of the elastic insulating seat (3). The first terminal (5) has a seventh connecting protrusion (55), which is annular and is disposed on the outer peripheral surface of the first terminal (5) and arranged around its axis. The sixth connecting protrusion (33) abuts against the folded edge (11) on the side facing away from the bottom surface of the mounting groove (301), and the sixth connecting protrusion (33) abuts against the side of the seventh connecting protrusion (55) facing away from the core (2) on the side facing towards the bottom surface of the mounting groove (301). The outer peripheral surface of the first terminal (5) is abutted against the side of the mounting groove (301) away from its center through the seventh connecting protrusion (55).

20. The battery according to claim 1, characterized in that, The housing (1) also has an explosion-proof structure (8), which is located on the outer end face of the housing (1) at the other end relative to the opening (101); When the pressure inside the battery rises to the second preset internal pressure range, the battery is depressurized through the explosion-proof structure (8).

21. The battery according to claim 20, characterized in that, The explosion-proof structure (8) includes an explosion-proof groove (81) and an explosion-proof line (82). The explosion-proof groove (81) is located on the outer wall surface of the housing (1), and the explosion-proof line (82) is located on the bottom surface of the explosion-proof groove (81).

22. The battery according to claim 21, characterized in that, The number of explosion-proof structures (8) is at least two, and all the explosion-proof structures (8) are evenly arranged around the center of the housing (1).

23. A battery pack, characterized in that, It includes a housing and a battery as described in any one of claims 1-22, wherein the battery is disposed within the housing.

24. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1-22, or the battery pack as described in claim 23.

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