Secondary battery and electric device

Abstract

The utility model provides a secondary battery and an electric device, and relates to the technical field of batteries. The secondary battery comprises a shell with a shell body and a shell cover, a positive terminal arranged on the shell cover in a penetrating manner, a control panel electrically connected with the positive terminal, a sealing element blocked between the control panel and a roll core, a conductive component arranged on the sealing element in a penetrating manner, and the roll core. The shell is provided with a containing cavity and an opening communicated with the containing cavity, the shell cover is connected with the shell to cover the opening, the positive terminal is insulated from the shell through the shell cover, the roll core, the control panel and the sealing element are arranged in the containing cavity, a positive lug of the roll core faces the positive terminal, and a negative lug of the roll core is electrically connected with the shell. And the conductive component is electrically connected with the control panel and the positive tab of the roll core respectively. According to the secondary battery provided by the invention, the use of an inner shell is omitted, and the space utilization rate of the secondary battery is improved, so that the secondary battery has higher energy density.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a secondary battery and an electrical device. Background Art

[0002] The information disclosed in this background art section is only for enhancing the understanding of the overall background art of the present disclosure, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art.

[0003] In the related art, a secondary battery has two layers of housings, namely an outer housing and an inner housing. The outer housing is used to accommodate the inner housing and a control board, and the inner housing is used to wrap and seal a wound core soaked with electrolyte to prevent the electrolyte from leaking and contaminating the control board inside the outer housing. However, the arrangement of the two layers of housings will occupy too much space, thus having a negative impact on the energy density of the secondary battery. Summary of the Utility Model

[0004] In view of this, the purpose of this application is to provide a secondary battery and an electrical device, aiming to solve the technical problem that the arrangement of two layers of housings in the related art will occupy too much space, thus having a negative impact on the energy density of the secondary battery.

[0005] To achieve the above purpose, the technical solution adopted in this application is as follows:

[0006] In a first aspect, an embodiment of this application provides a secondary battery, including:

[0007] An outer housing, including a housing body and a housing cover, the housing body has a receiving cavity and an opening communicating with the receiving cavity, and the housing cover is connected to the outer housing to cover the opening;

[0008] A positive terminal, passing through the housing cover and being insulated from the housing body through the housing cover;

[0009] A wound core, disposed in the receiving cavity, the positive tab of the wound core is arranged towards the positive terminal, and the negative tab of the wound core is electrically connected to the housing body;

[0010] A control board, disposed in the receiving cavity and electrically connected to the positive terminal;

[0011] A sealing element, located in the receiving cavity and blocking between the control board and the wound core;

[0012] A conductive component, passing through the sealing element and electrically connected to the control board and the positive tab of the wound core respectively.

[0013] In one embodiment of the first aspect, a limiting structure is provided on the housing facing the accommodating cavity, and the limiting structure is used to limit the relative movement of the sealing element relative to the outer housing in the central line direction of the core.

[0014] In one embodiment of the first aspect, the limiting structure includes a first annular limiting portion, and an annular sealing groove adapted to the outer shape of the first annular limiting portion is formed along the outer peripheral side of the sealing element, and the first annular limiting portion is supported at the annular sealing groove.

[0015] In one embodiment of the first aspect, at least a part of the lid is received in the accommodating cavity, and the part of the lid received in the accommodating cavity is supported on the control board. The limiting structure further includes a second annular limiting portion, and the second annular limiting portion is supported between the control board and the sealing element.

[0016] In one embodiment of the first aspect, a plurality of positioning posts are spaced apart on the part of the lid supported on the control board, and a plurality of first positioning holes are spaced apart along the edge of the control board. Each positioning post is disposed through one of the first positioning holes to limit the relative rotation of the control board relative to the outer housing.

[0017] In one embodiment of the first aspect, the conductive assembly includes a connector and a conductive element. The sealing element is respectively provided with a communicating avoidance hole and a first limiting hole. The conductive element is disposed at the first limiting hole and is electrically connected to the positive electrode tab of the core. One end of the connector is electrically connected to the control board, and the other end of the connector passes through the avoidance hole and abuts against the conductive element.

[0018] In one embodiment of the first aspect, the first limiting hole includes a first hole body and a second hole body. The first hole body communicates between the avoidance hole and the second hole body. The conductive element includes a first conductive portion and a second conductive portion connected to each other. The first hole body and the second hole body jointly define a stepped shape. The sealing element is sleeved on the first conductive portion through the first hole body and is sleeved on the second conductive portion through the second hole body to limit the relative movement of the conductive element relative to the sealing element in the central line direction of the core. The second conductive portion is electrically connected to the positive electrode tab of the core, and the connector abuts against the first conductive portion.

[0019] In one embodiment of the first aspect, the connector has a clearance fit with the avoidance hole.

[0020] In one embodiment of the first aspect, the positive terminal includes a positive electrode cap, a clamping member, and a plug. The clamping member and the plug are respectively connected to the positive electrode cap. Second limiting holes and second positioning holes communicating with the accommodating cavity are respectively formed in the shell cover. A spring clip electrically connected to the control board is arranged on the control board. The clamping member is clamped at the second limiting hole, and the plug passes through the second positioning hole and is clamped and cooperated with the spring clip.

[0021] In a second aspect, an embodiment of the present application further provides an electrical device, including the secondary battery in any of the above embodiments.

[0022] The beneficial effects of the present application are as follows:

[0023] For the secondary battery provided by the present application, since the wound core is directly infiltrated by the electrolyte in the outer shell, the negative tab of the wound core is electrically connected to the housing, the positive tab of the wound core is electrically connected to the control board through a conductive component, and the control board is electrically connected to the positive terminal, thereby realizing the electrical connection between the positive tab of the wound core and the positive terminal. On this basis, a sealing element is blocked at the accommodating cavity between the control board and the wound core to achieve a sealing effect, thereby restricting the leakage of the electrolyte from one side of the wound core to the control board side. In this way, the use of the inner shell is omitted, the space utilization rate of the secondary battery is improved, and the secondary battery has a higher energy density. At the same time, the positive terminal is insulated from the housing through the shell cover, and the sealing element separates the conductive component and the inner side wall of the housing to play an insulating role, thereby reducing the risk of short circuit of the secondary battery. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0025] Figure 1 Shows a schematic structural view of a perspective of a secondary battery in some embodiments of the present application;

[0026] Figure 2 Shows Figure 1 The cross-sectional structural view at A-A in;

[0027] Figure 3 Shows a partial exploded structural view of another perspective of a secondary battery in some embodiments of the present application;

[0028] Figure 4 Shows a partial exploded structural view of yet another perspective of a secondary battery in some embodiments of the present application.

[0029] Description of Main Component Symbols:

[0030] 100 - Secondary battery; 110 - Outer shell; 111 - Housing; 1111 - Accommodating cavity; 1112 - Opening; 1113 - Charging port; 112 - Shell cover; 1121 - Positioning post; 1122 - Second limiting hole; 1123 - Second positioning hole; 113 - Limiting structure; 1131 - First annular limiting part; 1132 - Second annular limiting part; 120 - Positive terminal; 121 - Positive electrode cap; 122 - Clamping part; 123 - Plug; 130 - Winding core; 131 - Positive electrode tab; 132 - Negative electrode tab; 140 - Control board; 141 - Spring clip; 142 - Charging interface part; 143 - First positioning hole; 150 - Sealing element; 151 - Annular sealing groove; 152 - Avoidance hole; 153 - First limiting hole; 1531 - First hole body; 1532 - Second hole body; 160 - Conductive component; 161 - Connector; 162 - Conductive element; 1621 - First conductive part; 1622 - Second conductive part. Detailed Embodiment

[0031] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present application and should not be construed as a limitation to the present application.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0034] In this application, unless otherwise clearly specified or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0036] As Figure 1 shown, in a first aspect, an embodiment of the present application provides a secondary battery 100, which relates to the technical field of batteries and is mainly applied to power-consuming devices such as electronic atomization devices, electric vehicles, electric ships, and aircraft.

[0037] Combined Figures 2 to 4 shown, the secondary battery 100 provided in this embodiment includes: a housing 110, a positive terminal 120, a wound core 130, a control board 140, a sealing element 150, and a conductive component 160.

[0038] Among them, the housing 110 includes a housing body 111 and a housing cover 112. The housing body 111 has a receiving cavity 1111 and an opening 1112 communicating with the receiving cavity 1111. The housing cover 112 is connected to the housing 110 to cover the opening 1112. The positive terminal 120 is disposed through the housing cover 112 to be insulated from the housing 110 through the housing cover 112. The wound core 130 is disposed in the receiving cavity 1111. The positive tab 131 of the wound core 130 is disposed facing the positive terminal 120, and the negative tab 132 of the wound core 130 is electrically connected to the housing body 111. The control board 140 is disposed in the receiving cavity 1111 and is electrically connected to the positive terminal 120. The sealing element 150 is located in the receiving cavity 1111 and is blocked between the control board 140 and the wound core 130. The conductive component 160 is disposed through the sealing element 150 and is electrically connected to the control board 140 and the positive tab 131 of the wound core 130 respectively.

[0039] It should be noted that the core 130 is made by a winding process. Specifically, it is a structure formed by winding the positive electrode sheet, the negative electrode sheet and the separator together by the winding needle of a winding machine. The negative electrode tab 132 of the core 130 is electrically connected to the housing 111, making the housing 111 the negative electrode of the external circuit. The conductive component 160 is electrically connected to the control board 140 and the positive electrode tab 131 of the core 130 respectively, and is electrically connected to the positive terminal 120 through the control board 140, making the positive terminal 120 the positive electrode of the external circuit.

[0040] Exemplarily, the sealing element 150 can be an element with an elastic sealing effect such as sealing silica gel or sealing rubber. The control board 140 can be a printed circuit board (PCB) or a flexible printed circuit board (FPC). There is no specific limitation on the types of the sealing element 150 and the control board 140 here.

[0041] It should be mentioned that in the related art, the secondary battery has two layers of housings, namely an outer housing and an inner housing. The outer housing is used to accommodate the inner housing and the control board, and the inner housing is used to wrap and seal the core infiltrated with the electrolyte to prevent the electrolyte from leaking and polluting the control board inside the outer housing. However, the setting of the two layers of housings will occupy too much space, thus having a negative impact on the energy density of the secondary battery.

[0042] It can be understood that for the secondary battery 100 provided in this embodiment, since the core 130 is directly infiltrated with the electrolyte in the outer housing 110, the negative electrode tab 132 of the core 130 is electrically connected to the housing 111, and the positive electrode tab 131 of the core 130 is electrically connected to the control board 140 through the conductive component 160, while the control board 140 is electrically connected to the positive terminal 120, so as to realize the electrical connection between the positive electrode tab 131 of the core 130 and the positive terminal 120. On this basis, a sealing element 150 is blocked at the accommodation cavity 1111 between the control board 140 and the core 130 to achieve a sealing effect, thereby restricting the electrolyte from leaking from the core 130 side to the control board 140 side. In this way, the use of the inner housing is omitted, the space utilization rate of the secondary battery 100 is improved, and the secondary battery 100 has a higher energy density. At the same time, the positive terminal 120 is insulated from the housing 111 through the housing cover 112, and the sealing element 150 separates the conductive component 160 from the inner side wall of the housing 111 to play an insulating role, thereby reducing the risk of short circuit of the secondary battery 100.

[0043] As Figure 1 shown, in one embodiment, the housing 111 is provided with a limiting structure 113 facing the accommodation cavity 1111, and the limiting structure 113 is used to limit the relative movement of the sealing element 150 in the center line direction of the core 130 with respect to the outer housing 110.

[0044] In this embodiment, since the housing 111 is provided with a limiting structure 113 facing the accommodating cavity 1111, the limiting structure 113 can limit the relative movement of the sealing element 150 with respect to the outer shell 110 in the central line direction of the core 130, so as to apply a supporting force to the core 130 through the sealing element 150, thereby limiting the shaking of the core 130 relative to the outer shell 110 in the accommodating cavity 1111, and improving the stability of the core 130. At the same time, the stability of the sealing element 150 is improved, thereby reducing the risk of electrolyte contamination of the control board 140 caused by seal failure.

[0045] As Figure 2 and Figure 3 shown, further, the limiting structure 113 includes a first annular limiting portion 1131, and an annular sealing groove 151 adapted to the outer shape of the first annular limiting portion 1131 is formed on the outer peripheral side of the sealing element 150, and the first annular limiting portion 1131 is supported at the annular sealing groove 151.

[0046] In this embodiment, by forming the annular sealing groove 151 on the outer peripheral side of the sealing element 150 and supporting the first annular limiting portion 1131 at the annular sealing groove 151, not only can a better limiting effect on the sealing element 150 be achieved, but also the gap between the sealing element 150 and the inner side wall of the housing 111 can be more effectively sealed, thereby reducing the risk of electrolyte leakage and contamination of the control board 140.

[0047] As Figure 2 shown, furthermore, at least a part of the cover 112 is received in the accommodating cavity 1111, and the part of the cover 112 received in the accommodating cavity 1111 is supported on the control board 140. The limiting structure 113 further includes a second annular limiting portion 1132, and the second annular limiting portion 1132 is supported between the control board 140 and the sealing element 150.

[0048] In this embodiment, since the part of the cover 112 received in the accommodating cavity 1111 is supported on the control board 140, and the second annular limiting portion 1132 is supported between the control board 140 and the sealing element 150, on the one hand, the relative movement of the control board 140 with respect to the outer shell 110 in the central line direction of the core 130 can be limited, reducing the failure rate of the secondary battery 100. On the other hand, the sealing element 150 can be further supported, so that the sealing element 150 can more stably support the core 130 and achieve a better sealing effect.

[0049] It should be noted that a rolling process or an integral forming process can be adopted to make the housing 111 concave towards the accommodating cavity 1111 to form the above-mentioned first annular limiting portion 1131 and second annular limiting portion 1132. The forming methods of the first annular limiting portion 1131 and the second annular limiting portion 1132 are not specifically limited herein.

[0050] As Figure 4 shown, further, a plurality of positioning posts 1121 are spacedly arranged on the part of the housing cover 112 that supports on the control board 140, and a plurality of first positioning holes 143 are spacedly opened along the edge of the control board 140. Each positioning post 1121 is arranged to pass through a first positioning hole 143 to limit the relative rotation of the control board 140 with respect to the outer shell 110.

[0051] Exemplarily, the positioning posts 1121 and the positioning holes can be provided with two, three, four, five, etc. respectively, and no specific limitation is made herein.

[0052] In this embodiment, since a plurality of positioning posts 1121 are spacedly arranged on the part of the housing cover 112 that supports on the control board 140, and a plurality of first positioning holes 143 are spacedly opened along the edge of the control board 140, and each positioning post 1121 is arranged to pass through a first positioning hole 143. This can limit the relative rotation of the control board 140 with respect to the outer shell 110 and reduce the failure rate of the secondary battery 100.

[0053] Of course, for the above embodiment, a plurality of positioning posts 1121 can also be spacedly arranged on the edge of the control board 140, and a plurality of first positioning holes 143 can be spacedly arranged on the part of the housing cover 112 that supports on the control board 140. In this way, the relative rotation of the control board 140 with respect to the outer shell 110 can also be limited.

[0054] As Figures 2 to 4 shown, in one embodiment, the conductive component 160 includes a connector 161 and a conductive element 162. The sealing element 150 is respectively provided with a communicating avoidance hole 152 and a first limiting hole 153. The conductive element 162 is arranged at the first limiting hole 153 and is electrically connected to the positive electrode tab 131 of the winding core 130. One end of the connector 161 is electrically connected to the control board 140, and the other end of the connector 161 passes through the avoidance hole 152 and abuts against the conductive element 162.

[0055] Exemplarily, the connector 161 can be an electrically conductive element such as a spring pin or a conductive post.

[0056] In this embodiment, since the conductive element 162 is disposed at the first limiting hole 153 and electrically connected to the positive electrode tab 131 of the core 130, one end of the connector 161 is electrically connected to the control board 140, and the other end of the connector 161 passes through the avoidance hole 152 and abuts against the conductive element 162. In this way, the positive terminal 120 is electrically connected to the positive electrode tab 131 of the core 130, making the positive terminal 120 the positive electrode of the external circuit. At the same time, the sealing element 150 provides a sealing effect, reducing the risk of electrolyte leaking along the first limiting hole 153 and the avoidance hole 152 to the side of the control board 140.

[0057] As Figure 2 shown, further, the first limiting hole 153 includes a first hole body 1531 and a second hole body 1532. The first hole body 1531 communicates between the avoidance hole 152 and the second hole body 1532. The conductive element 162 includes a connected first conductive part 1621 and a second conductive part 1622. The first hole body 1531 and the second hole body 1532 jointly define a stepped shape. The sealing element 150 is sleeved on the first conductive part 1621 through the first hole body 1531 and is sleeved on the second conductive part 1622 through the second hole body 1532 to limit the relative movement of the conductive element 162 with respect to the sealing element 150 in the central axis direction of the core 130. The second conductive part 1622 is electrically connected to the positive electrode tab 131 of the core 130, and the connector 161 abuts against the first conductive part 1621.

[0058] In this embodiment, since the first hole body 1531 and the second hole body 1532 jointly define a stepped shape, and the sealing element 150 is sleeved on the first conductive part 1621 through the first hole body 1531 and is sleeved on the second conductive part 1622 through the second hole body 1532, this can limit the relative movement of the conductive element 162 with respect to the sealing element 150 in the central axis direction of the core 130, reducing the risk of sealing failure caused by the relative movement of the conductive element 162 with respect to the sealing element 150.

[0059] As Figure 2 shown, even further, the connector 161 has a clearance fit with the avoidance hole 152, that is, there is a gap between the connector 161 and the hole wall of the avoidance hole 152. This can reduce the influence of the sealing element 150 on the connector 161, enabling the connector 161 to more stably abut against the conductive element 162, thereby making the electrical connection between the positive terminal 120 and the positive electrode tab 131 of the core 130 more stable.

[0060] Of course, for the above embodiment, the connector 161 and the avoidance hole 152 can also be in an interference fit or an interference fit. No specific limitation is made on the fitting method between the two here.

[0061] As Figures 2 to 4As shown, in one embodiment, the positive terminal 120 includes a positive electrode cap 121, a clamping member 122, and a plug 123. The clamping member 122 and the plug 123 are respectively connected to the positive electrode cap 121. Second limiting holes 1122 and second positioning holes 1123 communicating with the accommodating cavity 1111 are respectively formed in the housing cover 112. A spring clip 141 electrically connected thereto is arranged on the control board 140. The clamping member 122 is clamped at the second limiting hole 1122, and the plug 123 passes through the second positioning hole 1123 and is clamped and matched with the spring clip 141, so as to realize that the positive terminal 120 is detachably arranged through the housing cover 112.

[0062] Exemplarily, when assembling the positive terminal 120, first align the plug 123 with the second positioning hole 1123, and then pass the plug 123 through the second positioning hole 1123 until the plug 123 is clamped by the spring clip 141, and at this time, the clamping member 122 is just clamped at the second limiting hole 1122.

[0063] In this embodiment, the electrical connection between the positive terminal 120 and the control board 140 is realized through the clamping cooperation between the plug 123 and the spring clip 141. And when the plug 123 and the spring clip 141 are clamped and matched, the clamping member 122 is just clamped at the second limiting hole 1122, which is convenient for installing and disassembling the positive terminal 120.

[0064] Of course, in the above embodiment, the spring clip 141 can also be arranged on the positive electrode cap 121, and the plug 123 can be arranged on the control board 140, and the electrical connection between the positive terminal 120 and the positive electrode tab 131 of the winding core 130 can also be realized. Similarly, a second limiting hole 1122 can also be formed in the positive electrode cap 121, and the clamping member 122 can be arranged on the housing cover 112, and the clamping of the positive terminal 120 and the housing cover 112 can also be realized.

[0065] As Figure 1 and Figure 2 shown, in one embodiment, the housing 111 and the housing cover 112 jointly define a charging port 1113 communicating with the accommodating cavity 1111. A charging interface member 142 electrically connected thereto is arranged on the control board 140, and the charging interface member 142 is located at the charging port 1113.

[0066] Exemplarily, the charging interface member 142 can be selected from a Type-C interface member, a USB interface member, a Lightning interface member, etc., and no specific limitation is made here.

[0067] In this embodiment, through the arrangement of the charging port 1113 and the charging interface member 142, it is convenient for the user to charge the secondary battery 100 through the charging interface member 142 at the charging port 1113.

[0068] Second aspect, an embodiment of the present application provides an electrical device, including the secondary battery 100 mentioned in any of the above embodiments.

[0069] It can be understood that since the electrical device provided in this embodiment has the secondary battery 100 in any of the above embodiments, it has all the beneficial effects of the secondary battery 100, which will not be listed one by one here.

[0070] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0071] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A secondary battery, characterized in that: include: The housing comprises a shell and a shell cover, wherein the shell has a receiving cavity and an opening communicating with the receiving cavity, and the shell cover is connected to the shell to cover the opening; A positive terminal is arranged through the shell cover to be insulated from the shell through the shell cover; A winding core is arranged in the accommodating cavity, the positive electrode ear of the winding core is arranged toward the positive electrode terminal, and the negative electrode ear of the winding core is electrically connected to the shell; A control board, disposed in the accommodating cavity and electrically connected to the positive terminal; A sealing element is located in the accommodating cavity and seals between the control board and the winding core; The conductive component is arranged through the sealing element and is electrically connected to the control board and the positive electrode ear of the winding core respectively.

2. The secondary battery according to claim 1, characterized in that: The shell body is provided with a limiting structure toward the accommodating cavity, and the limiting structure is used to limit the movement of the sealing element relative to the outer shell in the direction of the center line of the winding core.

3. The secondary battery according to claim 2, characterized in that: The limiting structure comprises a first annular limiting portion, an annular sealing groove adapted to the shape of the first annular limiting portion is opened along the outer circumference of the sealing element, and the first annular limiting portion is supported at the annular sealing groove.

4. The secondary battery according to claim 3, characterized in that: At least part of the shell cover is accommodated in the accommodating cavity, and the part of the shell cover accommodated in the accommodating cavity is supported on the control board, and the limiting structure also includes a second annular limiting portion, which is supported between the control board and the sealing element.

5. The secondary battery according to claim 4, characterized in that: The portion of the shell cover that supports the control board is provided with a plurality of positioning posts at intervals, a plurality of first positioning holes are provided at intervals along the edge of the control board, and each of the positioning posts is passed through one of the first positioning holes to limit the control board from rotating relative to the shell.

6. The secondary battery according to any one of claims 1 to 5, characterized in that: The conductive component includes a connector and a conductive element. The sealing element is respectively provided with a connected avoidance hole and a first limiting hole. The conductive element is arranged at the first limiting hole and is electrically connected to the positive electrode ear of the winding core. One end of the connector is electrically connected to the control board, and the other end of the connector is passed through the avoidance hole and abuts against the conductive element.

7. The secondary battery according to claim 6, characterized in that: The first limiting hole includes a first hole body and a second hole body, the first hole body is connected between the avoidance hole and the second hole body, the conductive element includes a first conductive part and a second conductive part connected to each other, the first hole body and the second hole body jointly define a step shape, the sealing element is sleeved on the first conductive part through the first hole body, and is sleeved on the second conductive part through the second hole body to limit the conductive element from moving relative to the sealing element in the center line direction of the winding core, the second conductive part is electrically connected to the positive electrode ear of the winding core, and the connector abuts against the first conductive part.

8. The secondary battery according to claim 6, characterized in that: The connector is clearance-matched with the avoidance hole.

9. The secondary battery according to any one of claims 1 to 5, characterized in that: The positive terminal includes a positive cap, a clamping piece and a latch, the clamping piece and the latch are respectively connected to the positive cap, the shell cover is respectively provided with a second limiting hole and a second positioning hole connected to the accommodating cavity, a spring clip electrically connected to the control board is provided, the clamping piece is clamped at the second limiting hole, the latch is passed through the second positioning hole and is clamped and cooperated with the spring clip.

10. An electrical device, characterized in that: A secondary battery comprising the secondary battery according to any one of claims 1 to 9.

Images