Battery, battery pack and electric equipment

Abstract

The invention relates to the technical field of batteries, and discloses a battery, a battery pack and electric equipment.The battery comprises a shell, a roll core, an elastic insulating base, an insulating part, a first terminal and a second terminal, the second terminal comprises a limiting plate, a connecting column and a collector plate which are connected in the first direction, and the collector plate is located on the side, away from the roll core, of the first terminal; the collector plate is embedded in the insulating part; the battery is provided with an auxiliary plane perpendicular to the first direction, the orthographic projection of the insulating part on the auxiliary plane is a first projection, the orthographic projection of the first terminal on the auxiliary plane is a second projection, and at least part of the first projection falls into the second projection, so that when the collector plate is stressed, the first terminal limits the insulating part, and the insulating part is prevented from being damaged. Therefore, the collector plate is limited to move towards the inside of the shell, namely, the second terminal of the battery with the structure is not easy to move towards the inside of the shell when being stressed, and the structural reliability of the battery is relatively high.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery, a battery pack and an electrical device. Background Art

[0002] At present, some cylindrical batteries have an open end in the length direction of the shell, and the open end is sealed with a rubber plug, wherein the positive terminal and the negative terminal are both arranged on the side of the rubber plug facing away from the shell, and the positive terminal is annular, and the negative terminal is located on the inner side of the positive terminal, and the two are separated by the annular protrusion of the rubber plug to achieve insulation. For cylindrical batteries with this structure, since rubber has no rigidity and supporting strength, the negative terminal separated in the middle by the annular protrusion of the rubber plug needs to be designed with additional support inside the shell, which complicates the structure of the battery and reduces reliability. Summary of the invention

[0003] The primary purpose of the present invention is to provide a battery with a simple structure and higher reliability.

[0004] In order to achieve the above object, the present invention provides a battery, including a housing, a winding core, an elastic insulating seat, an insulating member, a first terminal and a second terminal;

[0005] The shell has an opening, and the opening is located at one end of the shell along the first direction;

[0006] The winding core is arranged in the shell;

[0007] The outer peripheral surface of the elastic insulating seat is tightly attached to the inner wall surface of the shell and seals the opening. The elastic insulating seat is provided with a mounting groove and a mounting hole on a side facing away from the winding core. The mounting hole penetrates the elastic insulating seat along the first direction. The mounting groove is annular, and the mounting hole is located on the inner side of the mounting groove.

[0008] The first terminal is in the shape of an annular plate, and is disposed in the mounting groove, and the outer peripheral surface of the first terminal is tightly fitted with the groove side surface of the mounting groove away from the center thereof, and the inner peripheral surface of the first terminal is fitted with the groove side surface of the mounting groove close to the center thereof, and the first terminal is conductively connected to the winding core;

[0009] The second terminal comprises a limit plate, a connecting column and a current collecting plate, wherein the limit plate, the connecting column and the current collecting plate are connected along the first direction, the limit plate is arranged in the shell and is located between the elastic insulating seat and the winding core, a side of the limit plate facing away from the winding core is in contact with the elastic insulating seat, a side of the limit plate facing away from the elastic insulating seat is conductively connected to the winding core, the connecting column passes through the mounting hole, and the current collecting plate is located on a side of the first terminal away from the winding core;

[0010] The insulating member is disposed between the first terminal and the current collecting plate to insulate the first terminal from the current collecting plate;

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

[0012] In a specific embodiment of the present invention, the orthographic projection of the current collecting plate 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, a surface of the insulating member facing away from the first terminal is provided with a receiving groove, and a bottom surface of the receiving groove is provided with a first avoidance hole penetrating along the first direction;

[0014] Wherein, the current collecting plate is embedded in the accommodating groove, and the hole wall surface of the first avoidance hole faces the groove side surface of the installation groove close to the center thereof.

[0015] In a specific embodiment of the present invention, the length dimension of the current collecting plate in the first direction is greater than the depth dimension of the accommodating groove.

[0016] In a specific embodiment of the present invention, the current collecting plate is provided with a connecting hole penetrating along the first direction, the current collecting plate has a first annular connecting protrusion, the first connecting protrusion is located on the hole wall surface of the connecting hole, and the first connecting protrusion is arranged around the axis of the connecting hole;

[0017] An annular limiting groove is provided at one end of the connecting column away from the limiting plate, and the limiting groove is arranged around the axis of the connecting column;

[0018] Wherein, the connecting column passes through the connecting hole, and the first connecting protrusion is clamped in the limiting groove.

[0019] In a specific embodiment of the present invention, the elastic insulating seat has a first annular slope, which connects the side of the elastic insulating seat facing away from the winding core and the hole wall of the mounting hole, and the first annular slope is inclined outward from the winding core to the collecting plate.

[0020] In a specific embodiment of the present invention, the elastic insulating seat also has a second annular slope, which connects the side of the elastic insulating seat facing away from the winding core and the side surface of the mounting groove close to its center, and the second annular slope is inclined inward from the winding core to the collecting plate.

[0021] In a specific embodiment of the present invention, the first terminal comprises a first end plate, a second end plate and a connecting block, the outer edge of the first end plate is circular, the second end plate has a second avoidance hole penetrating along the first direction, the first end plate and the second end plate are connected by the connecting block, and a hollow 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 is tightly fitted with the outer groove surface of the mounting groove, and the hole wall surface of the second avoidance hole is fitted with the groove side surface of the mounting groove close to the center thereof;

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

[0023] When the pressure in the battery rises to a first preset internal pressure range, the limit plate together with the elastic insulating seat is lifted up toward the winding core and disconnects the connecting block, and the elastic insulating seat ruptures, and at least part of it and the limit plate are flipped out to the side of the first end plate away from the winding core.

[0024] In a specific embodiment of the present invention, the insulating member shields the hollowed-out area.

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

[0026] In a specific embodiment of the present invention, at least a portion of the connection blocks are provided with thinning grooves on a side facing the winding core and / or a side facing away from the winding 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 shell is cylindrical and made of conductive material. The portion of the shell located at the open edge is folded toward the center to form an annular folded edge. The side of the folded edge facing the inside of the shell is pressed tightly against the side of the elastic insulating seat facing away from the winding core, and the folded edge is conductively connected to the first terminal. The first terminal is conductively connected to the winding core through the shell.

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

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

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

[0032] In a specific embodiment of the present invention, the outer circumferential surface of the shell is deflected toward the inside of the shell near the opening, and a first annular groove around its axis is formed on the outer circumferential surface of the shell, and a third connecting protrusion corresponding to the first annular groove is formed on the inner circumferential surface of the shell, and the third connecting protrusion is annular, and the third connecting protrusion compresses the outer circumferential surface of the elastic insulating seat, so that the outer circumferential surface of the elastic insulating seat forms a second annular groove arranged around its axis.

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

[0034] In a specific embodiment of the present invention, the first terminal has a third avoidance hole penetrating along the first direction;

[0035] The elastic insulating seat further has a fifth connecting protrusion, the fifth connecting protrusion is located on the bottom surface of the mounting groove, and the fifth connecting protrusion is penetrated by the third avoidance hole, and a liquid injection hole is provided on a side of the fifth connecting protrusion facing away from the winding core, and the liquid injection hole penetrates from the side of the fifth connecting protrusion facing away from the winding core to the side of the elastic insulating seat facing the winding core;

[0036] The battery further comprises a sealing nail, and the sealing nail is interference-fitted and sealed with the wall surface of the injection hole.

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

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

[0039] Among them, the side of the sixth connecting protrusion facing away from the bottom surface of the installation groove is pressed against the folded edge, the side of the sixth connecting protrusion facing the bottom surface of the installation groove is pressed against the side of the seventh connecting protrusion facing away from the winding core, and the outer peripheral surface of the first terminal is pressed against the side surface of the installation groove away from its center through the seventh connecting protrusion.

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

[0041] When the battery is within a second preset internal pressure range, the battery is depressurized through the explosion-proof structure.

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

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

[0044] The present invention further provides a battery pack, comprising a box and the battery as described above, wherein the battery is arranged in the box.

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

[0046] Compared with the prior art, the battery, battery pack and electrical equipment of the embodiment of the present invention have the following beneficial effects:

[0047] In the battery of the present invention, the outer circumferential surface of the elastic insulating seat is tightly fitted with the inner circumferential surface of the shell and the sealing opening is high, the connection stability between the elastic insulating seat and the shell is relatively high, and the outer circumferential surface of the first terminal is tightly fitted with the groove side away from the center of the mounting groove, and the fixing stability of the first terminal is relatively high. Therefore, the first terminal is not easy to move toward the inside of the shell when under pressure, and the collecting plate of the second terminal is located on the side of the first terminal away from the winding core, and the first projection of the insulating member on the auxiliary plane at least partially falls into the second projection of the first terminal on the auxiliary plane. Therefore, when the collecting plate is under pressure, the first terminal will limit the insulating member, and then limit the movement of the collecting plate toward the inside of the shell. That is, in a battery with this structure, the first terminal and the second terminal are not easy to move toward the inside of the shell when subjected to force, and the structural reliability of the battery is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a three-dimensional diagram of a battery according to an embodiment of the present invention;

[0049] Figure 2 is a three-dimensional diagram of a battery according to an embodiment of the present invention from another angle;

[0050] Figure 3 is a three-dimensional diagram of a housing according to an embodiment of the present invention;

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

[0052] Figure 5 Embodiment of the present invention Figure 4 A is an enlarged schematic diagram;

[0053] Figure 6 Embodiment of the present invention Figure 5 A magnified schematic diagram of B;

[0054] Figure 7 Embodiment of the present invention Figure 5 A magnified schematic diagram of middle C;

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

[0056] Fig. 9 is a schematic diagram of the relationship between the second projection and the third projection of an embodiment of the present invention;

[0057] Fig.10 is a three-dimensional diagram of a first terminal according to an embodiment of the present invention;

[0058] Fig.11 is a three-dimensional diagram of the first terminal of the embodiment of the present invention from another angle;

[0059] Fig.12 is a three-dimensional diagram of a second terminal according to an embodiment of the present invention;

[0060] Fig.13 is a three-dimensional diagram of an insulating member according to an embodiment of the present invention;

[0061] Fig.14 It is a three-dimensional diagram of the elastic insulating seat according to an embodiment of the present invention.

[0062] In the figure, 1, shell; 101, open; 102, first annular groove; 11, folded edge; 12, third connecting protrusion; 2, winding core; 3, elastic insulating seat; 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, injection hole; 33, sixth connecting protrusion; 4, insulating member; 401, accommodating groove; 402, first avoidance hole; 41, shielding part; 5, first terminal; 501, hollowing area; 502, first avoidance groove; 5 03. trough body; 504. third avoidance hole; 51. first end plate; 52. second end plate; 5201. second avoidance hole; 53. connecting block; 5301. thinning groove; 54. second connecting protrusion; 55. seventh connecting protrusion; 6. second terminal; 61. limit plate; 62. connecting column; 6201. limit groove; 63. collecting 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 DESCRIPTION

[0063] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0064] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0065] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0066] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

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

[0068] In addition, the present application also proposes a battery pack, which includes a case and the following batteries, and the battery pack can be applied to the above-mentioned electrical equipment.

[0069] like Figures 1 to 14As shown, a battery according to a preferred embodiment of the present invention comprises a shell 1, a winding core 2, an elastic insulating seat 3, an insulating member 4, a first terminal 5 and a second terminal 6; the shell 1 is cylindrical, the axial direction of the shell 1 is a first direction X, the shell 1 has an opening 101, and the opening 101 is located at one end of the shell 1 along its length direction; the winding core 2 is arranged in the shell 1; the outer peripheral surface of the elastic insulating seat 3 is tightly connected with the inner wall surface of the shell 1 and seals the opening 101, and the side of the elastic insulating seat 3 facing away from the winding core 2 is provided with a mounting groove 301 and a mounting hole 302, the mounting hole 302 passes through the elastic insulating seat 3 along the first direction X, the mounting groove 301 is annular, and the mounting hole 302 is located on the inner side of the mounting groove 301; the first terminal 5 is annular plate-shaped, the first terminal 5 is arranged in the mounting groove 301, and the outer peripheral surface of the first terminal 5 is tightly fitted with the groove side of the mounting groove 301 away from the center, the inner peripheral surface of the first terminal 5 is fitted with the groove side of the mounting groove 301 close to the center, and the first terminal 5 is connected to the winding core. 2 conductive connection; the second terminal 6 includes a limit plate 61, a connecting column 62 and a current collecting plate 63, the limit plate 61, the connecting column 62 and the current collecting plate 63 are connected along the first direction X, the limit plate 61 is arranged in the housing 1 and is located between the elastic insulating seat 3 and the winding core 2, the side of the limit plate 61 facing away from the winding core 2 is in contact with the elastic insulating seat 3, the side of the limit plate 61 facing away from the elastic insulating seat 3 is conductively connected to the winding core 2, the connecting column 62 passes through the mounting hole 302 and has an interference fit with the hole wall of the mounting hole 302 The battery is fitted with the current collecting plate 63 on the side of the first terminal 5 away from the winding core 2; the insulating member 4 is placed between the first terminal 5 and the current collecting plate 63 to insulate the first terminal 5 and the current collecting plate 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 into the second projection 300.

[0070] In the battery of the present application, the outer circumferential surface of the elastic insulating seat 3 is tightly fitted with the inner circumferential surface of the shell 1 and the sealing opening 101, the connection stability of the elastic insulating seat 3 and the shell 1 is relatively high, and the outer circumferential surface of the first terminal 5 is tightly fitted with the groove side of the mounting groove 301 away from the center thereof, and the fixing stability of the first terminal 5 is relatively high. Therefore, the first terminal 5 is not easy to move toward the shell 1 when subjected to force, and the current collecting plate 63 of the second terminal 6 is located on the side of the first terminal 5 away from the winding core 2, and 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 collecting plate 63 is subjected to force, the first terminal 5 will limit the insulating member 4, and then limit the current collecting plate 63 from moving toward the shell 1. That is, in a battery with this structure, the first terminal 5 and the second terminal 6 are not easy to move toward the shell 1 when subjected to force, and the structural reliability of the battery is relatively high.

[0071] In the present application, the above-mentioned first terminal 5 is conductively connected to the positive pole of the winding core 2, and the second terminal 6 is conductively connected to the negative pole of the winding core 2, wherein the first terminal 5 and the second terminal 6 are both made of conductive materials; typically, the side of the limit plate 61 facing away from the elastic insulating seat 3 is conductively connected to the winding core 2 through the first collecting disk, and the first collecting disk is arranged in the shell 1.

[0072] In the present application, the orthographic projection of the current collecting plate 63 on the auxiliary plane 100 is a third projection 400, and the third projection 400 at least partially falls within the second projection 300; illustratively, as Fig.12 As shown, the current collecting plate 63 is in the shape of a circular plate. The current collecting plate 63 of this structure is easy to process, and the outer diameter of the current collecting plate 63 is larger than the inner diameter of the first terminal 5. Fig. 9 As shown, the outer edge of the third projection 400 falls into the second projection 300. As a preferred embodiment of the present application, the strength of the current collecting plate 63 is higher than that of the insulating member 4. Therefore, when the current collecting plate 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 lower than that of the current collecting plate 63, the insulating member 4 can be more tolerant of the force applied to the current collecting plate 63. The first terminal 5 can better limit the movement of the current collecting plate 63 toward the shell 1, which can further improve the structural reliability of the battery.

[0073] like Fig.13 As shown, the insulating member 4 is plate-shaped, and a receiving groove 401 is provided on a side of the insulating member 4 facing away from the first terminal 5, and a first avoidance hole 402 penetrating along the first direction X is provided on the bottom surface of the receiving groove 401; Figure 5 As shown, the current collecting plate 63 is embedded in the accommodating groove 401, and the hole wall surface of the first avoidance hole 402 faces the groove side surface of the installation groove 301 close to its center, wherein the current collecting plate 63 is embedded in the accommodating groove 401 means that the current collecting plate 63 is arranged in the accommodating groove 401, and the side of the current collecting plate 63 facing the winding core 2 is in contact with the groove bottom surface of the accommodating groove 401, and the outer peripheral surface of the current collecting plate 63 is in contact with the groove side surface of the accommodating groove 401. At this time, the insulating member 4 at least covers the end of the current collecting plate 63 facing the winding core 2. The insulating member 4 with this structure is used to achieve insulation between the current collecting plate 63 and the first terminal 5. The insulating member 4 can well isolate the current collecting plate 63 and the first terminal 5, and the insulation effect is good.

[0074] Optional, such as Figure 5As shown, the length dimension of the current collecting plate 63 in the first direction X is greater than the depth dimension of the accommodating groove 401, that is, the end of the current collecting plate 63 away from the winding core 2 is at least partially exposed from the notch of the accommodating groove 401, thereby facilitating the connection of the current collecting plate 63 with an external conductive part. For example, when the battery is applied to a battery pack, the first terminal 5 of the battery and the current collecting plate 63 both need to be connected to the corresponding bus. At this time, the current collecting plate 63 is at least partially exposed from the notch of the accommodating groove 401, which is conducive to the staff welding the bus to the current collecting plate 63 and convenient processing.

[0075] In this application, if Figure 5 and Figure 6 As shown, the current collecting plate 63 is provided with a connecting hole 6301 penetrating along the first direction X, and the current collecting plate 63 has an annular first connecting protrusion 631, the first connecting protrusion 631 is located on the hole wall surface of the connecting hole 6301, and the first connecting protrusion 631 is arranged around the axis of the connecting hole 6301; the end of the connecting column 62 away from the limiting plate 61 is provided with an annular limiting groove 6201, and the limiting groove 6201 is arranged around the axis of the connecting column 62; wherein the connecting column 62 penetrates the connecting hole 6301, and the first connecting protrusion 631 is clamped in the limiting groove 6201; specifically, the connecting column 62 and the current collecting plate 63 are connected by riveting, wherein the connecting column 62 is connected to the current collecting plate 63 before riveting. 2 includes a first column section and a second column section, the first column section is connected to the limiting plate 61, the outer diameter of the first column section is larger than the outer diameter of the second column section, when the connecting column 62 and the current collecting plate 63 are prepared for riveting, the second column section penetrates the inner side of the connecting hole 6301 and the first connecting protrusion 631, after the connecting column 62 and the current collecting plate 63 are riveted, the second column section is compressed and deformed, and the outer diameter of the part of it that penetrates the connecting hole 6301 becomes larger, and the above-mentioned limiting groove 6201 is formed between the part and the first column section, and the first connecting protrusion 631 is clamped in the limiting groove 6201, and the connection between the current collecting plate 63 and the connecting column 62 is realized in this way, which is convenient to process and has high connection stability between the two, which is conducive to improving the structural reliability of the battery. At the same time, after riveting, the connecting column 62 and the current collecting plate 63 will be welded at the joint away from the winding core, further ensuring that the connecting column 62 and the current collecting plate 63 have better connection conductivity.

[0076] Optional, such as Figure 6 and Fig.14As shown, the elastic insulating seat 3 has a first annular slope 303, and the first annular slope 303 connects the side of the elastic insulating seat 3 facing away from the winding core 2 and the hole wall of the mounting hole 302, and the first annular slope 303 is inclined outward from the winding core 2 to the current collecting plate 63. Specifically, as mentioned above, the connecting column 62 and the current collecting plate 63 are connected by riveting, and before riveting and during the assembly of the connecting column 62 and the current collecting plate 63, the existence of the first annular slope 303 can avoid clamping part of the elastic insulating seat 3 between the first column section and the first connecting protrusion 631, thereby avoiding the riveting process. The riveting connection strength and conductivity are deteriorated, and the welding process after riveting is avoided. Fire is avoided, thereby improving the processing quality of the battery.

[0077] Further, such as Fig.14 As shown, the elastic insulating seat 3 also has a second annular slope 304, and the second annular slope 304 connects the side of the elastic insulating seat 3 facing away from the winding core 2 and the groove side of the mounting groove 301 near its center, and the second annular slope 304 is inclined inward from the winding core 2 to the collecting plate 63. Since the groove side of the mounting groove 301 near its center is in contact with the inner circumferential surface of the first terminal 5, the groove side of the mounting groove 301 near its center is annular, and the outer diameter of the part in contact with the first terminal 5 is the first outer diameter, and the first outer diameter is close 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, when the first terminal 5 is assembled to the mounting groove 301, the second annular slope 304 plays a guiding and avoiding role, and the first terminal 5 is easy to assemble with the elastic insulating seat 3.

[0078] In actual applications, when the battery is short-circuited, overcharged, continuously heated to thermal runaway, etc., a violent reaction will occur inside the battery, generating a large amount of gas. Especially when the battery has thermal runaway, it will produce gas violently in a short period of time, and the internal pressure will soar instantly. At this time, the gas in the battery needs to be discharged in time to release the pressure to avoid battery explosion.

[0079] In this application, if Figure 1 , Fig.10 and Fig.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, the second end plate 52 has a second avoidance hole 5201 penetrating 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 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 tightly fitted with the outer groove surface of the mounting groove 301, and the second avoidance hole 5201 is formed in the first direction X. The hole wall surface of the hole 5201 is fitted with the groove side surface of the installation groove 301 near its center, that is, the first end plate 51 has a through hole penetrating along the first direction X, the second end plate 52 is located in the through hole, the connecting block 53 connects the outer peripheral surface of the second end plate 52 and the hole wall surface of the through hole, the outer peripheral surface of the first end plate 51 constitutes the outer peripheral surface of the first terminal 5, the hole wall surface of the second avoidance hole 5201 constitutes the inner peripheral surface of the first terminal 5, the outer peripheral surface of the second end plate 52, the hole wall surface of the through hole and the connecting block 53 are connected to each other. The side of the block 53 defines the above-mentioned hollow area 501; wherein, the hollow area 501 is arranged around the limiting plate 61; when the pressure in the battery rises to the first preset internal pressure range, the limiting plate 61 together with the elastic insulating seat 3 is lifted up against the winding 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 is broken, and at least part of it and the limiting plate 61 are turned out to the side of the first end plate 51 away from the winding core 2. In a battery of this structure, the elastic insulating seat 3 is soft, and the setting of the hollow area 501 reduces the connection strength between the first end plate 51 and the second end plate 52. The advantage is that when the pressure in the battery rises to the first preset air pressure, under the action of the air pressure, the elastic insulating seat 3 will be torn by the limiting plate 61, thereby, the range of the mounting hole 302 will be expanded, and the gas in the battery can be quickly discharged from the torn area, so as 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 first preset air pressure is designated as the explosion-proof pressure relief pressure of the battery, which depends on the actual application and will not be elaborated in this application.

[0081] Further, such as Fig.10 and Fig.11 As shown, there are two connecting blocks 53, which are respectively located on the opposite sides of the second avoidance hole 5201. The first end plate 51 and the second end plate 52 are connected by the two connecting blocks 53, so as to improve the overall strength of the first terminal 5 to ensure the structural reliability of the battery; of course, the number of connecting blocks 53 can be one, three or more, and the present application does not impose any restrictions on this; when the number of connecting blocks 53 is multiple, the number of hollow areas 501 is also multiple, and the multiple hollow areas 501 are arranged around the second avoidance hole 5201. The first terminal 5 of this structure can also ensure that the limit plate 61 can be flipped out to the side of the first end plate 51 away from the winding core 2 at the first preset air pressure.

[0082] Optional, such as Fig.10 As shown, a thinning groove 5301 is provided on a side of the connecting block 53 facing away from the winding core 2. Preferably, the thinning groove 5301 is connected to the hollowed-out area 501. The setting of the thinning groove 5301 thins the thickness of the connecting block 53. Thus, when the battery is at a first preset air pressure, the connecting block 53 is more easily broken under the action of the air pressure, so that the second end plate 52 can be flipped up at the first preset air pressure.

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

[0084] In this application, if Figure 1 , Figure 3 and Figure 5 As shown, the shell 1 is made of conductive material, and the portion of the shell 1 located at the edge of the opening 101 is folded toward the center to form an annular folded edge 11, and the side of the folded edge 11 facing the inside of the shell 1 is pressed tightly against the side of the elastic insulating seat 3 facing away from the winding core 2, and the folded edge 11 is conductively connected to the first terminal 5, and the first terminal 5 is conductively connected to the winding core 2 through the shell 1, wherein the folded edge 11 is connected to the first end plate 51 of the first terminal 5 by welding, which can make the first terminal 5 more stably arranged on the elastic insulating seat 3, thereby, the first terminal 5 is less likely to move toward the shell 1 when subjected to force, thereby better limiting the movement of the current collecting plate 63 toward the shell 1 when the current collecting plate 63 is subjected to force, based on this, the battery has higher structural reliability; specifically, the shell 1 and the winding core 2 are conductively connected through the second collecting disk, and the second collecting disk is arranged in the shell 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. Generally speaking, the busbar is welded to the side of the first terminal 5 facing away from the winding core 2. However, in the present application, the shell 1 is connected to the first terminal 5 through the folded edge 11. In 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 winding core 2. Therefore, if the busbar is welded to the side of the first terminal 5 facing away from the winding core 2, it is easy for the folded edge 11 to lift up the busbar, which results in poor contact between the first terminal 5 and the busbar, which in turn causes poor welding and low reliability of battery electrical connection. Based on this, in the present application, Figure 1 and Fig.10As shown, the first terminal 5 has a second connecting protrusion 54, and the second connecting protrusion 54 is located on the side of the first terminal 5 facing away from the winding core 2, and the folded edge 11 is located between the side of the second connecting protrusion 54 facing away from the winding core 2 and the side of the first terminal 5 facing the winding core 2, wherein the side of the second connecting protrusion 54 facing away from the winding core 2 is used for welding with the bus. Since the folded edge 11 is located between the side of the second connecting protrusion 54 facing away from the winding core 2 and the side of the first terminal 5 facing the winding core 2, the side of the folded edge 11 facing away from the winding core 2 is not higher than the side of the second connecting protrusion 54 facing away from the winding core 2. Therefore, after the bus is welded to the second connecting protrusion 54, the folded edge 11 will not lift up the bus, and the welding reliability between the second connecting protrusion 54 and the bus is high, and there will be no poor welding. Therefore, the battery is used in a battery pack, and its electrical connection reliability is high.

[0086] Optional, such as Figure 5 and Fig.10 As shown, an outer edge of a side of the first terminal 5 facing away from the winding core 2 is provided with an annular first avoidance groove 502, and the first avoidance groove 502 is arranged around the center of the first terminal 5, and the folded edge 11 extends into the first avoidance groove 502, thereby, 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 lifting the above-mentioned bus, and further ensure the reliability of the electrical connection between the battery and the bus; in addition, when the shell 1 is folded to form the folded edge 11, the first avoidance groove 502 provides a certain avoidance space, so that the folded edge 11 has sufficient bending degree, so that the folded edge 11 can be folded to a state connected with the first terminal 5.

[0087] In this application, if Figure 5 , Figure 7 and Fig.11 As shown, one side of the first terminal 5 facing the winding core 2 is partially recessed to form a groove body 503, so that the side of the first terminal 5 facing away from the winding core 2 is raised to form a second connecting protrusion 54, that is, the first terminal 5 and the second connecting protrusion 54 are an integrated structure. In practical applications, the first terminal 5 is stamped to form the above-mentioned second connecting protrusion 54, thereby forming the groove body 503. Specifically, the first terminal 5 and the second connecting protrusion 54 are formed by a stamping process. The process is simple, the processing is convenient and the cost is low, and 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 circumference of the shell 1 is bent toward the inside of the shell 1 near the opening 101, and a first annular groove 102 around its axis is formed on the outer circumference of the shell 1, and a third connecting protrusion 12 corresponding to the first annular groove 102 is formed on the inner circumference of the shell 1, and the third connecting protrusion 12 is annular. The third connecting protrusion 12 compresses the outer circumference of the elastic insulating seat 3, so that the outer circumference of the elastic insulating seat 3 forms a second annular groove 305 arranged around its axis; specifically, the shell 1 is processed by a roller groove process to form the first annular groove 102, and the inner circumference of the shell 1 is convex and forms the third connecting protrusion 12 while the first annular groove 102 is formed, and the outer circumference of the elastic insulating seat 3 is concave and forms the second annular groove 305 while the third connecting protrusion 12 is formed. In this way, the elastic insulating seat 3 is fixed in the shell 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 circumference of the elastic insulating seat 3 and the inner wall of the shell 1, and there is a strong sealing between the two to meet the sealing requirements of normal use of the battery.

[0089] Preferably, in the axial direction of the shell 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, so that the first terminal 5 can be well fixed and the stability is very high. Therefore, the first terminal 5 is less likely to move toward the shell 1 when subjected to force, so that the current collecting plate 63 can be better restricted from moving toward the shell 1 when the current collecting plate 63 is subjected to force. Based on this, the first terminal 5 and the second terminal 6 are not easy to move toward the shell 1 when subjected to force, and the battery has higher structural reliability.

[0090] In addition, when the battery is processed, the elastic insulating seat 3 is first arranged in the shell 1, and then the shell 1 is processed with the first annular groove 102 and the folded edge 11 successively or simultaneously. The first annular groove 102 and the folded edge 11 will squeeze the elastic insulating seat 3 during the molding process. Since the elastic insulating seat 3 is elastic, the elastic insulating seat 3 will have a tendency to elastically recover after being deformed under pressure. Based on this tendency, the side of the elastic insulating seat 3 facing away from the winding core 2 will be close to the folded edge 11, and the outer peripheral surface of the insulating seat will be close to the inner peripheral surface of the shell 1. Based on this, the battery has the characteristic of good sealing effect.

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

[0092] In this application, if Fig.10 and Fig.11 As shown, the first terminal 5 has a third avoidance hole 504 penetrating along the first direction X; Fig.14 As shown, the elastic insulating seat 3 also has a fifth connecting protrusion 32, which is located on the bottom surface of the mounting groove 301, and a liquid injection hole 3201 is provided on a side of the fifth connecting protrusion 32 facing away from the winding core 2, and the liquid injection hole 3201 runs through from the side of the fifth connecting protrusion 32 facing away from the winding core 2 to the side of the elastic insulating seat 3 facing the winding core 2; Figure 5 As shown, the fifth connection protrusion 32 is penetrated by a third avoidance hole 504; the battery further includes a sealing nail 7, which is sealed by interference fit with the hole wall of the injection hole 3201; in actual application, the injection hole 3201 is used to inject electrolyte into the housing 1, and the function of the sealing nail 7 is to seal the injection hole 3201 after the battery is filled with electrolyte. Since the elastic insulating seat 3 is elastic, the sealing nail 7 can be sealed and connected to the injection hole 3201 by interference fit, which is convenient to assemble and has a good sealing effect.

[0093] Preferably, the insulating member 4 shields the hollow area 501. Exemplarily, the insulating member 4 has a shielding portion 41, and the shielding portion 41 shields the hollow area 501. This structure can prevent the electrolyte from entering the hollow area 501 when the battery is filled with liquid, thereby preventing the battery from being contaminated. In other embodiments, the insulating member 4 does not have the shielding portion 41. In this case, the insulating member 4 is in the shape of 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 hollow area 501.

[0094] like Fig.14 As shown, the elastic insulating seat 3 has a sixth connecting protrusion 33, which is annular and disposed on the side of the mounting groove 301 away from the center thereof, and is disposed around the axis of the elastic insulating seat 3; Fig.10 As shown, the first terminal 5 has a seventh connection protrusion 55, the seventh connection protrusion 55 is annular, and the seventh connection protrusion 55 is arranged on the outer peripheral surface of the first terminal 5 and around its axis; wherein, as Figure 7As shown, the side of the sixth connecting protrusion 33 facing away from the bottom of the mounting groove 301 is pressed against the folded edge 11, and the side of the sixth connecting protrusion 33 facing the bottom of the mounting groove 301 is pressed against the side of the seventh connecting protrusion 55 facing away from the winding core 2. The outer peripheral surface of the first terminal 5 is pressed against the side surface 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 against the seventh connecting protrusion 55, and the third connecting protrusion 12 can also play a role in supporting the first terminal 5. The folded edge 11 and the third connecting protrusion 12 cooperate to make the first terminal 5 more stably arranged on the elastic insulating seat 3, thereby making the structure of the battery more reliable. In addition, since the first terminal 5 is stably arranged on the elastic insulating seat 3, the first terminal 5 basically will not move toward the shell 1 when subjected to force. Therefore, when the current collecting plate 63 is subjected to force, the first terminal 5 will limit the movement of the current collecting plate 63 toward the shell 1, and the structural reliability of the battery is higher.

[0095] In the present application, the battery realizes explosion-proof pressure relief by tearing the elastic insulating seat 3 through the limit plate 61. Although this method can realize rapid pressure relief, if the battery produces gas violently under extreme conditions, since the battery has a certain length, it takes time for the gas at the bottom of the battery to be discharged from the above-mentioned tearing area at the top. This time difference will cause the shell 1 to be at risk of being torn by the gas, which in turn causes the battery to explode and catch fire. Therefore, in the battery of the present application, the shell 1 also has an explosion-proof structure 8, and the explosion-proof structure 8 is located on the outer end surface of the other end of the shell 1 relative to the opening 101; the battery is under the second preset internal pressure range, and the battery is explosion-proof. The explosion-proof structure 8 is used for pressure relief, wherein the first preset internal pressure range and the second preset internal pressure range have no limited size relationship. In the first preset internal pressure range, the gas will cause the limit plate 61 to tear the elastic insulating seat 3 and be discharged from the tearing area. In the second preset internal pressure range, the battery is depressurized through the explosion-proof structure 8. Exemplarily, the first preset internal pressure range is greater than the second preset internal pressure range. Thus, when the battery produces gas violently and reaches the first preset internal pressure, the gas inside it will cause the limit plate 61 to tear the elastic insulating seat 3 and be discharged from the tearing area. If the gas pressure inside the battery reaches the second preset internal pressure range, the gas inside it will further break through the explosion-proof structure 8, that is, Figure 1 As shown in the perspective, when the battery produces gas violently, the gas in the battery can be quickly discharged in two directions from the top tear area and the bottom explosion-proof structure 8. The battery can quickly release pressure to ensure that the battery will not be cracked by gas, and the battery safety is good.

[0096] Optionally, the explosion-proof structure 8 and the housing 1 are an integrated 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 explosion-proof groove 81. The explosion-proof structure 8 of this structure is simple in structure and convenient 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 encloses an explosion-proof area. The explosion-proof structure of this structure has a shell size with high molding uniformity.

[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, thereby further improving the uniformity of the housing size and improving the gas discharge efficiency of the battery. The exemplary number of explosion-proof structures 8 is three.

[0098] In the present invention, the material of the elastic insulating seat 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 above rubbers, and the present invention is not limited to this.

[0099] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A battery, characterized in that: It comprises a housing (1), a winding core (2), an elastic insulating seat (3), an insulating member (4), a first terminal (5) and a second terminal (6); The housing (1) has an opening (101), and the opening (101) is located at one end of the housing (1) along a first direction (X); The winding core (2) is arranged in the shell (1); The outer peripheral surface of the elastic insulating seat (3) is in close contact with the inner wall surface of the shell (1) and seals the opening (101); a mounting groove (301) and a mounting hole (302) are provided on a side of the elastic insulating seat (3) facing away from the winding core (2); the mounting hole (302) passes through the elastic insulating seat (3) along the first direction (X); the mounting groove (301) is annular, and the mounting hole (302) is located on the inner side of the mounting groove (301); The first terminal (5) is in the shape of an annular plate. The first terminal (5) is arranged in the mounting groove (301), and the outer peripheral surface of the first terminal (5) is tightly fitted with the groove side surface of the mounting groove (301) away from the center thereof, and the inner peripheral surface of the first terminal (5) is fitted with the groove side surface of the mounting groove (301) close to the center thereof. The first terminal (5) is conductively connected to the winding core (2); The second terminal (6) comprises a limit plate (61), a connecting column (62) and a current collecting plate (63); the limit plate (61), the connecting column (62) and the current collecting plate (63) are connected along the first direction (X); the limit plate (61) is arranged in the shell (1) and is located between the elastic insulating seat (3) and the winding core (2); the side of the limit plate (61) facing away from the winding core (2) is in contact with the elastic insulating seat (3); the side of the limit plate (61) facing away from the elastic insulating seat (3) is conductively connected to the winding core (2); the connecting column (62) is provided with the mounting hole (302); and the current collecting plate (63) is located on a side of the first terminal (5) away from the winding core (2); The insulating member (4) is placed between the first terminal (5) and the current collecting plate (63) to insulate the first terminal (5) and the current collecting plate (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), the orthographic projection of the first terminal (5) on the auxiliary plane (100) is a second projection (300), and the first projection (200) at least partially falls within the second projection (300).

2. The battery according to claim 1, characterized in that The orthographic projection of the current collecting plate (63) on the auxiliary plane (100) is a third projection (400), and the third projection (400) at least partially falls within the second projection (300).

3. The battery according to claim 1, characterized in that The insulating member (4) is plate-shaped, and a receiving groove (401) is provided on a side of the insulating member (4) facing away from the first terminal (5), and a first avoidance hole (402) penetrating along the first direction (X) is provided on the bottom surface of the receiving groove (401); The current collecting plate (63) is embedded in the accommodating groove (401), and the hole wall surface of the first avoidance hole (402) faces the groove side surface of the installation groove (301) close to the center thereof.

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

5. The battery according to claim 1, characterized in that The current collecting plate (63) is provided with a connection hole (6301) penetrating along the first direction (X), and the current collecting plate (63) has a first annular connection protrusion (631), the first connection protrusion (631) is located on the hole wall surface of the connection hole (6301), and the first connection protrusion (631) is arranged around the axis of the connection hole (6301); An annular limiting groove (6201) is provided at one end of the connecting column (62) away from the limiting plate (61), and the limiting groove (6201) is arranged around the axis of the connecting column (62); Wherein, the connecting column (62) is provided with the connecting hole (6301), and the first connecting protrusion (631) is snap-fitted into the limiting groove (6201).

6. The battery according to claim 1, characterized in that The elastic insulating seat (3) has a first annular slope (303), the first annular slope (303) connecting a side of the elastic insulating seat (3) facing away from the winding core (2) and a hole wall surface of the mounting hole (302), and the first annular slope (303) is inclined outwards in a direction from the winding core (2) to the current collecting plate (63).

7. The battery according to claim 1, characterized in that The elastic insulating seat (3) further comprises a second annular slope (304), the second annular slope (304) connecting a side of the elastic insulating seat (3) facing away from the winding core (2) and a groove side surface of the mounting groove (301) close to its center, and the second annular slope (304) is inclined inwardly in a direction from the winding core (2) to the current collecting plate (63).

8. The battery according to claim 1, characterized in that The first terminal (5) comprises 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 avoidance hole (5201) penetrating along the first direction (X); the first end plate (51) and the second end plate (52) are connected via the connecting block (53); a hollowing 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 tightly fitted with the outer groove surface of the mounting groove (301); and the hole wall surface of the second avoidance hole (5201) is fitted with the groove side surface of the mounting groove (301) close to the center thereof; Wherein, the hollowed-out area (501) is arranged around the limiting plate (61); When the pressure in the battery rises to a first preset internal pressure range, the limit plate (61) together with the elastic insulating seat (3) is lifted up away from the winding core (2) and the connecting block (53) is disconnected, and the elastic insulating seat (3) is broken, and at least part of it and the limit plate (61) are turned out to the side of the first end plate (51) away from the winding core (2).

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

10. The battery according to claim 8, characterized in that The number of the connecting block (53) is at least one.

11. The battery according to claim 10, characterized in that At least part of the connecting block (53) is provided with a thinning groove (5301) on a side facing the winding core (2) and / or a side facing away from the winding core (2).

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

13. The battery according to claim 1, characterized in that The shell (1) is cylindrical and made of a conductive material. The portion of the shell (1) located at the edge of the opening (101) is folded toward the center to form an annular folded edge (11). The side of the folded edge (11) facing the inside of the shell (1) is pressed tightly against the side of the elastic insulating seat (3) facing away from the winding core (2), and the folded edge (11) is conductively connected to the first terminal (5). The first terminal (5) is conductively connected to the winding core (2) through the shell (1).

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

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

16. The battery according to claim 14, characterized in that A portion of the first terminal (5) facing the winding core (2) is recessed to form a groove (503), so that a portion of the first terminal (5) facing away from the winding core (2) is raised to form the second connecting protrusion (54).

17. The battery according to claim 16, characterized in that The outer circumferential surface of the shell (1) is bent inwardly of the shell (1) at a position close to the opening (101), and a first annular groove (102) is formed on the outer circumferential surface of the shell (1) around its axis, and a third connecting protrusion (12) corresponding to the first annular groove (102) is formed on the inner circumferential surface of the shell (1), the third connecting protrusion (12) being annular, and the third connecting protrusion (12) compresses the outer circumferential surface of the elastic insulating seat (3), so that the outer circumferential surface of the elastic insulating seat (3) forms a second annular groove (305) arranged around its axis.

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

19. The battery according to claim 1, characterized in that The first terminal (5) has a third avoidance hole (504) penetrating along the first direction (X); The elastic insulating seat (3) further comprises a fifth connecting protrusion (32), the fifth connecting protrusion (32) being located on the bottom surface of the mounting groove (301), and the fifth connecting protrusion (32) being provided with the third avoidance hole (504), and a liquid injection hole (3201) being provided on a side of the fifth connecting protrusion (32) facing away from the winding core (2), and the liquid injection hole (3201) being passed through from a side of the fifth connecting protrusion (32) facing away from the winding core (2) to a side of the elastic insulating seat (3) facing the winding core (2); The battery further comprises a sealing nail (7), wherein the sealing nail (7) is in interference fit with the wall surface of the injection hole (3201) to form a seal.

20. The battery according to claim 13, characterized in that The elastic insulating seat (3) has a sixth connecting protrusion (33), the sixth connecting protrusion (33) is annular, and the sixth connecting protrusion (33) is arranged on the groove side of the installation groove (301) away from the center thereof, and is arranged around the axis of the elastic insulating seat (3); The first terminal (5) has a seventh connection protrusion (55), the seventh connection protrusion (55) is annular, and the seventh connection protrusion (55) is arranged on the outer peripheral surface of the first terminal (5) and around the axis thereof; The side of the sixth connecting protrusion (33) facing away from the bottom surface of the mounting groove (301) is pressed against the folded edge (11), and the side of the sixth connecting protrusion (33) facing the bottom surface of the mounting groove (301) is pressed against the side of the seventh connecting protrusion (55) facing away from the winding core (2), and the outer peripheral surface of the first terminal (5) is pressed against the side surface of the mounting groove (301) away from its center through the seventh connecting protrusion (55).

21. The battery according to claim 1, characterized in that The shell (1) further comprises an explosion-proof structure (8), wherein the explosion-proof structure (8) is located on the outer end surface of the other end of the shell (1) relative to the opening (101); When the pressure inside the battery rises to a second preset internal pressure range, the battery releases pressure through the explosion-proof structure (8).

22. The battery according to claim 21, characterized in that The explosion-proof structure (8) comprises 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 explosion-proof groove (81).

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

24. A battery pack, characterized in that: It comprises a box body and a battery as described in any one of claims 1 to 23, wherein the battery is arranged in the box body.

25. An electrical device, characterized in that: Comprising a battery as described in any one of claims 1-23, or a battery pack as described in claim 24.

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