Single battery and electric device

Abstract

The utility model provides a single battery and an electric device, and relates to the technical field of batteries. The single battery comprises a shell with a containing cavity and an opening, a top cover assembly with a shell cover and a positive terminal, a battery cell arranged in the containing cavity, a control panel arranged in the containing cavity and electrically connected with the positive terminal, an insulating part located in the containing cavity and a connector arranged on the insulating part in a penetrating mode. The shell is provided with a limiting structure facing the containing cavity, the shell cover is connected with the shell to cover the opening, and the positive terminal penetrates through the shell cover to be insulated from the shell through the shell cover. A negative tab of the battery cell is electrically connected with the shell, the insulating part is supported at a positive tab of the battery cell, the limiting structure is supported at one side, deviating from the battery cell, of the insulating part, and the connector is electrically connected with the control panel and the positive tab of the battery cell respectively. According to the single battery provided by the invention, the shaking of the battery cell in the shell can be limited, the welding quality can be effectively improved, the deformation problem of the shell can be effectively solved, and meanwhile, the risk of short circuit of the single battery is also reduced.

Description

Technical Field

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

[0002] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art.

[0003] At present, there are two measures to prevent the battery cell from shaking in the shell of the single battery. One is to strengthen the reliability of the welding between the bottom of the battery cell and the bottom of the shell, and the other is to increase the size of the battery cell so that the battery cell and the inner wall of the shell are in closer contact. However, enhancing the welding reliability may cause the risk of over-welding and cold welding, and increasing the closeness of the contact between the battery cell and the shell may cause the shell of the single battery to deform during use. Therefore, both of the above measures will reduce the yield rate of the single battery. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a single cell battery and an electrical device, aiming to solve the technical problem that the current measures to prevent the shaking of the battery cell will reduce the yield of the single cell battery.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a single cell, comprising:

[0007] A housing having a receiving cavity and an opening, wherein the housing is provided with a limiting structure toward the receiving cavity;

[0008] A top cover assembly, comprising a shell cover and a positive terminal, wherein the shell cover is connected to the outer shell to cover the opening, and the positive terminal is arranged through the shell cover to be insulated from the outer shell through the shell cover;

[0009] A battery cell is disposed in the accommodating cavity, and a negative electrode ear of the battery cell is electrically connected to the housing;

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

[0011] An insulating member is located in the accommodating cavity and supported at the positive electrode ear of the battery cell, and the limiting structure is supported on a side of the insulating member away from the battery cell;

[0012] The connector is inserted through the insulating member and is electrically connected to the control board and the positive electrode ear of the battery cell respectively.

[0013] In one embodiment of the first aspect, the limiting structure is an annular limiting portion formed by the shell being concave inwardly toward the accommodating cavity.

[0014] In one embodiment of the first aspect, the insulating member includes a first insulator, a second insulator and a connector, the first insulator is provided with a through avoidance hole, the connector is passed through the avoidance hole and abuts against the positive ear of the battery cell, the second insulator is arranged around the first insulator, and the side of the second insulator away from the first insulator is abutted against the inner side wall of the outer shell, the annular limiting portion abuts against the side of the second insulator away from the battery cell, and the connector is connected between the first insulator and the second insulator.

[0015] In one embodiment of the first aspect, the connector includes a plurality of connectors, the plurality of connectors are spaced apart around the first insulator, and each of the connectors is connected between the first insulator and the second insulator, so that a vent hole is formed between every two adjacent connectors.

[0016] In one of the embodiments of the first aspect, the single battery further includes a conductive member, the insulating member is respectively provided with interconnected avoidance holes and limiting holes, and is sleeved on the conductive member through the limiting holes, and the outer peripheral side of the insulating member is attached to the inner side wall of the outer shell, the conductive member is electrically connected to the positive pole ear of the battery cell, the connector is passed through the avoidance hole and abuts against the conductive member, so as to realize electrical connection between the connector and the positive pole ear of the battery cell through the conductive member.

[0017] In one of the embodiments of the first aspect, the shell cover includes a cover plate and a surrounding plate, the cover plate is connected to the outer shell to cover the opening, the positive terminal is arranged through the cover plate, one end of the surrounding plate is connected to a side of the cover plate facing the battery cell, one end of the surrounding plate away from the cover plate is supported on the control board, and the limiting structure is supported between the control board and the insulating member.

[0018] In one embodiment of the first aspect, the positive terminal includes a positive cap and a plug connected to each other, the positive cap is connected to the cover plate, and a spring clip electrically connected to the cover plate is provided on the control board, and the spring clip is clamped and cooperated with the plug to achieve electrical connection between the positive cap and the control board.

[0019] In one of the embodiments of the first aspect, a positioning column is provided at one end of the enclosure supporting the control panel, a positioning hole is provided on the control panel, and the positioning column is passed through the positioning hole to limit the control panel from rotating relative to the shell cover.

[0020] In one of the embodiments of the first aspect, the outer shell and the shell cover jointly define a charging port connected to the accommodating cavity, and the control board is provided with a charging interface component electrically connected thereto, and the charging interface component is located at the charging port.

[0021] In a second aspect, an embodiment of the present application further provides an electrical device, comprising a single cell battery as described in any of the above embodiments.

[0022] The beneficial effects of this application are:

[0023] The single cell provided by the present application has an insulating member arranged in the accommodating cavity, the insulating member is supported at the positive ear of the battery cell, and at the same time, a limiting structure is arranged on the housing toward the accommodating cavity, and the limiting structure is supported on the side of the insulating member away from the battery cell, so that a supporting force is applied to the battery cell through the insulating member, which not only limits the shaking of the battery cell in the housing, but also effectively improves the welding quality and the deformation of the housing. On this basis, the insulating member also plays an insulating role of separating the connector from the housing, and at the same time, the positive terminal is insulated from the housing through the housing cover, which reduces the risk of short circuit of the single cell. As a result, the yield of the single cell is effectively improved.

[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a single cell in some embodiments of the present application is shown;

[0027] Figure 2 Shows Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0028] Figure 3 A schematic diagram of a partially exploded structure of a single cell in some embodiments of the present application from another viewing angle is shown;

[0029] Figure 4 A schematic diagram of a partially exploded structure of a single cell in some embodiments of the present application from another viewing angle is shown;

[0030] Figure 5Shows a schematic perspective structure diagram of a single battery in some other embodiments of the present application;

[0031] Figure 6 Shows Figure 5 The schematic cross-sectional structure diagram at B-B in;

[0032] Figure 7 Shows a schematic partial exploded structure diagram of another perspective of a single battery in some other embodiments of the present application.

[0033] Description of main component symbols:

[0034] 100 - Single battery; 110 - Outer shell; 111 - Accommodating cavity; 112 - Opening; 113 - Limiting structure; 114 - Charging port; 120 - Top cover assembly; 121 - Shell cover; 1211 - Cover plate; 1212 - Enclosing plate; 1213 - Positioning post; 122 - Positive terminal; 1221 - Positive electrode cap; 1222 - Plug; 130 - Battery cell; 131 - Positive electrode tab; 132 - Negative electrode tab; 140 - Control board; 141 - Spring clip; 142 - Charging interface component; 143 - Positioning hole; 150 - Insulating part; 151 - First insulator; 1511 - Avoidance hole; 1512 - Limiting hole; 152 - Second insulator; 153 - Connecting body; 1531 - Connecting part; 1532 - Ventilation hole; 160 - Connector; 170 - Conductive part. Detailed description of specific embodiments

[0035] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation of the present application.

[0036] 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 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 of the present application.

[0037] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless specifically defined otherwise.

[0038] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may 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.

[0039] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may 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", "below" and "beneath" the second feature may 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.

[0040] In a first aspect, an embodiment of this application provides a single cell, relating to the technical field of batteries, and is mainly applied to power-consuming devices such as electronic atomization devices, electric vehicles, electric ships, aircraft, etc.

[0041] As Figures 1 to 3 shown, the single cell 100 provided in this embodiment includes: a housing 110, a top cover assembly 120, a battery cell 130, a control board 140, an insulating member 150, and a connector 160.

[0042] Among them, the shell 110 has a accommodating cavity 111 and an opening 112, and the shell 110 is provided with a limiting structure 113 toward the accommodating cavity 111. The top cover assembly 120 includes a shell cover 121 and a positive terminal 122, the shell cover 121 is connected to the shell 110 to cover the opening 112, and the positive terminal 122 is arranged through the shell cover 121 to be insulated from the shell 110 by the shell cover 121. The battery cell 130 is arranged in the accommodating cavity 111, and the negative pole ear 132 of the battery cell 130 is electrically connected to the shell 110. The control board 140 is arranged in the accommodating cavity 111 and is electrically connected to the positive terminal 122. The insulating member 150 is located in the accommodating cavity 111 and is supported at the positive pole ear 131 of the battery cell 130, and the limiting structure 113 is supported on the side of the insulating member 150 away from the battery cell 130. The connector 160 is disposed through the insulating member 150 and is electrically connected to the control board 140 and the positive electrode tab 131 of the battery cell 130 , respectively.

[0043] For example, the control board 140 may be a printed circuit board (PCB) or a flexible printed circuit board (FPC). The connector 160 may be a conductive element such as a spring pin or a conductive column.

[0044] It should be noted that, by electrically connecting the negative electrode ear 132 of the battery cell 130 to the housing 110, the housing 110 becomes the negative electrode of the external circuit. By electrically connecting the positive terminal 122 to the control board 140, and electrically connecting the positive electrode ear 131 of the control board 140 and the battery cell 130 through the connector 160, the positive terminal 122 becomes the positive electrode of the external circuit.

[0045] It should be mentioned that there are currently two measures to prevent the battery cell from shaking in the shell of a single battery. One is to strengthen the reliability of the welding between the bottom of the battery cell and the bottom of the shell, and the other is to increase the size of the battery cell so that the battery cell and the inner wall of the shell are in closer contact. However, enhancing welding reliability may create the risk of over-welding and cold welding, and increasing the closeness of contact between the battery cell and the shell may cause the shell of the single battery to deform during use. Therefore, both of the above measures will reduce the yield of the single battery.

[0046] It can be understood that the single cell 100 provided in the present embodiment has an insulating member 150 disposed in the accommodating cavity 111, the insulating member 150 is supported at the positive ear 131 of the battery cell 130, and at the same time, the housing 110 is provided with a limiting structure 113 toward the accommodating cavity 111, and the limiting structure 113 is supported on the side of the insulating member 150 away from the battery cell 130, so that the insulating member 150 applies a supporting force to the battery cell 130, which not only limits the shaking of the battery cell 130 in the housing 110, but also effectively improves the welding quality and deformation of the housing 110. On this basis, the insulating member 150 also plays an insulating role in separating the connector 160 from the housing 110, and at the same time, the positive terminal 122 is insulated from the housing 110 through the housing cover 121, which reduces the risk of short circuit of the single cell 100. As a result, the yield of the single cell 100 is effectively improved.

[0047] like Figure 3 As shown, in one embodiment, the limiting structure 113 is an annular limiting portion formed by the housing 110 being concave inwardly toward the accommodating cavity 111 .

[0048] Exemplarily, a rolling process is used to make the housing 110 concave to form an annular limiting portion. Of course, an integral molding process can also be used to make the housing 110 concave to form an annular limiting portion.

[0049] In this embodiment, the insulating member 150 is supported by an annular limiting portion, which can provide a more uniform supporting force for the side of the insulating member 150 away from the battery cell 130, so that the insulating member 150 can stably support the battery cell 130 to limit the shaking of the battery cell 130 in the housing 110.

[0050] like Figure 3 As shown, further, the insulating member 150 includes a first insulator 151, a second insulator 152 and a connector 153. The first insulator 151 is provided with a through avoidance hole 1511. The connector 160 is passed through the avoidance hole 1511 and abuts against the positive pole ear 131 of the battery cell 130. The second insulator 152 is arranged around the first insulator 151, and the side of the second insulator 152 away from the first insulator 151 is attached to the inner wall of the shell 110. The annular limiting portion abuts against the side of the second insulator 152 away from the battery cell 130. The connector 153 is connected between the first insulator 151 and the second insulator 152.

[0051] It should be noted that the insulating member 150 is applicable to the case where the single cell 100 has an inner shell, that is, the battery core 130 includes a wound core and an inner shell. The inner shell is disposed in the accommodation cavity 111 of the outer shell 110, and the inner shell is filled with an electrolyte for infiltrating the wound core. The wound core is disposed in the inner shell and is sealed and wrapped by the inner shell together with the electrolyte and the wound core to prevent the electrolyte from entering the accommodation cavity 111 and leaking to the side of the control board 140 through the avoidance hole 1511.

[0052] In this embodiment, through the setting of the avoidance hole 1511, it is convenient for the connector 160 to pass through the insulating member 150 and be directly electrically connected to the positive electrode tab 131 of the battery core 130. In addition, through the setting of the first insulator 151 and the second insulator 152, the connector 160 can be insulated from the outer shell 110 to reduce the risk of short circuit of the single cell 100.

[0053] As Figure 3 and Figure 4 shown, further, the connecting body 153 includes a plurality of connecting portions 1531. The plurality of connecting portions 1531 are arranged at intervals around the first insulator 151, and each connecting portion 1531 is connected between the first insulator 151 and the second insulator 152, so that a ventilation hole 1532 is formed between every two adjacent connecting portions 1531.

[0054] In this embodiment, since a ventilation hole 1532 is formed between every two adjacent connecting portions 1531, the ventilation hole 1532 can dissipate the heat generated by the battery core 130, thereby reducing the risk of thermal runaway of the single cell 100 due to overheating of the battery core 130.

[0055] As Figures 5 to 7 shown, in another embodiment, the single cell 100 further includes a conductive member 170. The insulating member 150 is respectively provided with a communicating avoidance hole 1511 and a limiting hole 1512, and is sleeved on the conductive member 170 through the limiting hole 1512. The outer peripheral side of the insulating member 150 is attached to the inner side wall of the outer shell 110. The conductive member 170 is electrically connected to the positive electrode tab 131 of the battery core 130. The connector 160 is disposed through the avoidance hole 1511 and abuts against the conductive member 170, so as to realize that the connector 160 is electrically connected to the positive electrode tab 131 of the battery core 130 through the conductive member 170.

[0056] Exemplarily, the connector 160 is in clearance fit with the avoidance hole 1511, that is, there is a gap between the connector 160 and the hole wall of the avoidance hole 1511. Of course, the connector 160 can also be in transition fit with the avoidance hole 1511.

[0057] It should be noted that the insulating member 150 is applicable to the case where the single battery 100 does not have an inner shell, that is, the battery core 130 is a wound core. The accommodating cavity 111 area of the outer shell 110 where the side of the insulating member 150 facing away from the control board 140 is filled with electrolyte. At this time, the insulating member 150 not only has the functions of insulation and restricting the shaking of the battery core 130, but also has a sealing function to restrict the leakage of the electrolyte into the accommodating cavity 111 area where the control board 140 is located.

[0058] In this embodiment, since the insulating member 150 is arranged to fit the inner side wall of the outer shell 110 and is sleeved on the conductive member 170 through the limiting hole 1512, an effective sealing effect can be achieved to restrict the leakage of the electrolyte from the avoiding hole 1511 or the gap between the insulating member 150 and the outer shell 110 to the side of the control board 140.

[0059] As Figure 1 、 Figure 2 and Figure 4 shown, in one embodiment, the shell cover 121 includes a cover plate 1211 and a surrounding plate 1212. The cover plate 1211 is connected to the outer shell 110 to cover the opening 112. The positive terminal 122 is arranged to penetrate through the cover plate 1211. One end of the surrounding plate 1212 is connected to the side of the cover plate 1211 facing the battery core 130. The end of the surrounding plate 1212 away from the cover plate 1211 is supported on the control board 140, and the limiting structure 113 is supported between the control board 140 and the insulating member 150.

[0060] In this embodiment, since the cover plate 1211 is connected to the outer shell 110, one end of the surrounding plate 1212 is connected to the side of the cover plate 1211 facing the battery core 130, and the end of the surrounding plate 1212 away from the cover plate 1211 is supported on the control board 140. At the same time, the limiting structure 113 is supported between the control board 140 and the insulating member 150. In this way, the relative movement of the control board 140 with respect to the outer shell 110 in the center line direction of the battery core 130 can be effectively restricted, and the yield rate of the single battery 100 can be improved.

[0061] As Figure 3 and Figure 4 shown, further, the positive terminal 122 includes a positive electrode cap 1221 and a plug 1222 connected to each other. The positive electrode cap 1221 is connected to the cover plate 1211. A spring clip 141 electrically connected thereto is arranged on the control board 140. The spring clip 141 and the plug 1222 are clamped and matched to realize the electrical connection between the positive electrode cap 1221 and the control board 140.

[0062] In this embodiment, the positive electrode cap 1221 is electrically connected to the control board 140 by the clamping cooperation between the elastic piece clip 141 and the pin 1222, so that the positive electrode cap 1221 becomes the positive electrode of the external circuit. This method makes the installation of the positive terminal 122 more convenient and fast, and improves the assembly efficiency of the single cell 100.

[0063] Of course, for the above embodiment, the elastic piece clip 141 can also be arranged on the positive electrode cap 1221, and the pin 1222 can be arranged on the control board 140, which is also convenient to realize the electrical connection between the positive terminal 122 and the control board 140.

[0064] As Figure 4 shown, further, a positioning post 1213 is provided at one end of the surrounding plate 1212 supported on the control board 140, a positioning hole 143 is formed on the control board 140, and the positioning post 1213 is arranged through the positioning hole 143 to limit the relative rotation of the control board 140 with respect to the shell cover 121.

[0065] Exemplarily, the positioning post 1213 and the positioning hole 143 can both be set to one, two, three, four, etc., and no specific limitation is made here.

[0066] In this embodiment, by arranging the positioning post 1213 through the positioning hole 143, the relative rotation of the control board 140 with respect to the shell cover 121 can be restricted, and the yield rate of the single cell 100 is improved.

[0067] Of course, for the above embodiment, a positioning hole 143 can also be provided at one end of the surrounding plate 1212 supported on the control board 140, and a positioning post 1213 can be provided on the control board 140. The positioning post 1213 is arranged through the positioning hole 143, which can also restrict the relative rotation of the control board 140 with respect to the shell cover 121.

[0068] As Figure 1 and Figure 2 shown, in one embodiment, the outer shell 110 and the shell cover 121 jointly define a charging port 114 communicating with the accommodation cavity 111. A charging interface component 142 electrically connected thereto is arranged on the control board 140, and the charging interface component 142 is located at the charging port 114.

[0069] Exemplarily, the charging interface component 142 can be selected from a Type-C interface component, a USB interface component, a Lightning interface component, etc., and no specific limitation is made here.

[0070] In this embodiment, through the arrangement of the charging port 114 and the charging interface component 142, it is convenient to charge the single cell 100 through the charging interface component 142 at the charging port 114.

[0071] In a second aspect, an embodiment of the present application provides an electrical device, including the single cell 100 mentioned in any of the above embodiments.

[0072] It can be understood that since the electrical device provided in this embodiment has the single cell 100 in any of the above embodiments, it has all the beneficial effects of the single cell 100, and will not be listed one by one here.

[0073] In the description of this specification, the description with reference to terms such as "one 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.

[0074] 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 single cell battery, characterized in that: include: A housing having a receiving cavity and an opening, wherein the housing is provided with a limiting structure toward the receiving cavity; A top cover assembly, comprising a shell cover and a positive terminal, wherein the shell cover is connected to the outer shell to cover the opening, and the positive terminal is arranged through the shell cover to be insulated from the outer shell through the shell cover; A battery cell is disposed in the accommodating cavity, and a negative electrode ear of the battery cell is electrically connected to the housing; A control board, disposed in the accommodating cavity and electrically connected to the positive terminal; An insulating member is located in the accommodating cavity and supported at the positive electrode ear of the battery cell, and the limiting structure is supported on a side of the insulating member away from the battery cell; The connector is inserted through the insulating member and is electrically connected to the control board and the positive electrode ear of the battery cell respectively.

2. The single cell according to claim 1, characterized in that: The limiting structure is an annular limiting portion formed by the shell being concave inwardly toward the accommodating cavity.

3. The single cell according to claim 2, characterized in that: The insulating member includes a first insulator, a second insulator and a connector. The first insulator is provided with a through avoidance hole. The connector is passed through the avoidance hole and abuts against the positive ear of the battery cell. The second insulator is arranged around the first insulator, and a side of the second insulator away from the first insulator is abutted against the inner side wall of the shell. The annular limiting portion abuts against a side of the second insulator away from the battery cell. The connector is connected between the first insulator and the second insulator.

4. The single cell according to claim 3, characterized in that: The connector includes a plurality of connecting parts, which are arranged at intervals around the first insulator, and each of the connecting parts is connected between the first insulator and the second insulator, so that a vent hole is formed between every two adjacent connecting parts.

5. The single cell according to claim 1, characterized in that: The single battery also includes a conductive part, the insulating part is respectively provided with interconnected avoidance holes and limiting holes, and is sleeved on the conductive part through the limiting holes, and the outer peripheral side of the insulating part is attached to the inner side wall of the shell, the conductive part is electrically connected to the positive pole ear of the battery cell, the connector is passed through the avoidance hole and abuts against the conductive part, so that the connector is electrically connected to the positive pole ear of the battery cell through the conductive part.

6. The single cell according to any one of claims 1 to 5, characterized in that: The shell cover includes a cover plate and a surrounding plate, the cover plate is connected to the shell to cover the opening, the positive terminal is arranged through the cover plate, one end of the surrounding plate is connected to a side of the cover plate facing the battery cell, one end of the surrounding plate away from the cover plate is supported on the control board, and the limiting structure is supported between the control board and the insulating member.

7. The single cell according to claim 6, characterized in that: The positive terminal includes a positive cap and a plug connected to each other. The positive cap is connected to the cover plate. The control board is provided with a spring clip electrically connected to the cover plate. The spring clip is clamped and cooperated with the plug to realize electrical connection between the positive cap and the control board.

8. The single cell according to claim 7, characterized in that: The enclosure is supported on one end of the control panel and is provided with a positioning column. The control panel is provided with a positioning hole. The positioning column is passed through the positioning hole to limit the control panel from rotating relative to the shell cover.

9. The single cell according to any one of claims 1 to 5, characterized in that: The shell and the shell cover together define a charging port communicated with the accommodating cavity, and the control board is provided with a charging interface component electrically connected thereto, and the charging interface component is located at the charging port.

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

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