Secondary battery and electronic equipment

Abstract

The utility model discloses a secondary battery and electronic equipment, and relates to the technical field of secondary batteries. The secondary battery has a first direction, a second direction and a third direction which are vertical in pairs, and the secondary battery comprises a battery cell and a protection plate. One end of the battery cell along the third direction is constructed into a Z-shaped step part, the step part is provided with a convex part and a concave part, and the concave part is provided with a tab; and the protection plate is arranged in the concave part and is electrically connected with the tab. According to the secondary battery provided by the invention, the Z-shaped step part is constructed at one end of the battery cell along the third direction, the step part is provided with the convex part and the concave part, and the tab and the protection plate are arranged in the concave part, so that the occupied space of the protection plate in the first direction of the battery cell is reduced, and the convex part is conveniently increased to increase the volume of the battery cell; the space utilization rate of the battery cell is effectively improved, the capacity of the battery cell is improved, and the cruising ability of the electronic equipment is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a secondary battery and electronic device. Background Technology

[0002] Electronic devices, such as mobile phones or laptops, are powered by lithium batteries. These batteries also contain a battery protection board, which primarily protects the lithium battery during charging and discharging, thus extending its lifespan.

[0003] In related technologies, to improve the battery life of electronic devices, it is necessary to increase the capacity of lithium batteries, which in turn requires improving the space utilization rate of lithium batteries. However, existing battery protection boards are usually placed at the end of the battery cell, and their length direction is consistent with the width direction of the battery cell, thus occupying the entire width direction of the battery cell. This results in low space utilization of the battery cell, which affects its capacity. Utility Model Content

[0004] In order to achieve the above objectives, this application aims to provide a secondary battery that addresses the technical problem of low space utilization in existing lithium batteries, resulting in low capacity and thus affecting the battery life of electronic devices.

[0005] The technical solution adopted is as follows:

[0006] In a first aspect, embodiments of this application provide a secondary battery having a first direction, a second direction, and a third direction that are perpendicular to each other, and the secondary battery includes:

[0007] The battery cell has one end along the third direction configured as a Z-shaped stepped portion, the stepped portion having a protruding portion and a recessed portion, the recessed portion being provided with a tab;

[0008] A protective plate is disposed in the recessed portion and electrically connected to the electrode tab.

[0009] In one embodiment of the first aspect, two protrusions are provided, and the protective plate is located between the two protrusions along the first direction.

[0010] In one embodiment of the first aspect, the secondary battery further includes a first insulating adhesive layer that wraps around the protrusion.

[0011] In one embodiment of the first aspect, the secondary battery further includes a second insulating adhesive layer, which wraps around the tab and the protective plate, and wraps around the end of the cell near the tab. The second insulating adhesive layer and the first insulating adhesive layer are spaced apart along the first direction.

[0012] In one embodiment of the first aspect, the secondary battery further includes an insulating buffer member abutting between the end of the cell near the tab and the second insulating adhesive layer.

[0013] In one embodiment of the first aspect, the secondary battery further includes an insulating layer comprising a first insulating portion and a second insulating portion, the first insulating portion being connected to the second insulating portion, the first insulating portion being disposed at the end of the protrusion away from the cell, and the second insulating portion being wrapped around the tab and the protective plate.

[0014] In one embodiment of the first aspect, the first insulating part and the second insulating part are integrally injection molded from plastic material.

[0015] In one embodiment of the first aspect, the secondary battery further includes a third insulating layer, and two third insulating layers are provided, with the two third insulating layers respectively wrapping around both ends of the battery cell along the first direction.

[0016] In one embodiment of the first aspect, the secondary battery further includes a fourth insulating layer that wraps around the end of the cell away from the tab.

[0017] Secondly, embodiments of this application also provide an electronic device, including the secondary battery described in any of the above embodiments.

[0018] The beneficial effects of this application are as follows: This application proposes a secondary battery, which includes a battery cell and a protection board. One end of the battery cell along a third direction is constructed into a Z-shaped stepped portion, with a protruding portion and a recessed portion. The recessed portion is provided with a tab, and the protection board is disposed in the recessed portion and electrically connected to the tab. By constructing one end of the battery cell along a third direction into a Z-shaped stepped portion with a protruding portion and a recessed portion, and by placing both the tab and the protection board in the recessed portion, the space occupied by the protection board in the first direction of the battery cell is reduced. This facilitates the addition of a protruding portion to increase the volume of the battery cell, effectively improving the space utilization rate of the battery cell, increasing the capacity of the battery cell, and thus improving the battery life of electronic devices. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A perspective view of a secondary battery mounted on an electronic device is shown in some embodiments of this application. Figure 1 ;

[0021] Figure 2 A three-dimensional schematic diagram of a secondary battery in some embodiments of this application is shown. Figure 1 ;

[0022] Figure 3 It shows Figure 2 A three-dimensional schematic diagram omitting the first and second insulating layers;

[0023] Figure 4 A perspective view of a secondary battery mounted on an electronic device is shown in some embodiments of this application. Figure 2 ;

[0024] Figure 5 A three-dimensional schematic diagram of a secondary battery in some embodiments of this application is shown. Figure 2 ;

[0025] Figure 6 It shows Figure 5 A three-dimensional schematic diagram with the insulation layer removed.

[0026] Explanation of key component symbols:

[0027] 100-Secondary Battery;

[0028] 120 - Battery cell; 121 - Stepped portion; 1211 - Protruding portion; 1212 - Recessed portion; 12121 - Tab;

[0029] 130 - Protection board;

[0030] 140 - First insulating adhesive layer;

[0031] 150 - Second insulating layer;

[0032] 160 - Insulating buffer;

[0033] 170 - Insulating layer; 171 - First insulating part; 172 - Second insulating part;

[0034] 180 - Third insulating layer;

[0035] 190 - Fourth insulating layer;

[0036] X - First direction;

[0037] Y - Second direction;

[0038] Z-Third-party direction;

[0039] 1000 - Electronic devices. Detailed Implementation

[0040] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0041] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of this application provides a secondary battery 100, mainly used in an electronic device 1000. The secondary battery 100 has a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other. The secondary battery 100 includes a battery cell 120 and a protection board 130.

[0046] The battery cell 120 is configured as a Z-shaped stepped portion 121 at one end along the third direction Z. The stepped portion 121 has a protruding portion 1211 and a recessed portion 1212. The recessed portion 1212 is provided with a tab 12121. The protective plate 130 is disposed in the recessed portion 1212 and is electrically connected to the tab 12121.

[0047] The secondary battery 100 provided in the embodiments of this application includes a cell 120 and a protection plate 130. One end of the cell 120 along the third direction Z is configured as a Z-shaped stepped portion 121. The stepped portion 121 has a protruding portion 1211 and a recessed portion 1212. The recessed portion 1212 is provided with a tab 12121. The protection plate 130 is disposed in the recessed portion 1212 and is electrically connected to the tab 12121. By constructing a Z-shaped stepped portion 121 at one end of the battery cell 120 along the third direction Z, the stepped portion 121 has a protruding portion 1211 and a recessed portion 1212. Both the tab 12121 and the protection plate 130 are disposed in the recessed portion 1212, thereby reducing the space occupied by the protection plate 130 in the first direction X of the battery cell 120. This facilitates the increase of the protruding portion 1211 to increase the volume of the battery cell 120, effectively improving the space utilization rate and capacity of the battery cell 120, and thus enhancing the battery life of the electronic device 1000. This avoids the technical problem in the prior art where the low space utilization rate of lithium batteries leads to low capacity, which in turn affects the battery life of electronic devices.

[0048] For example, the battery cell 120 can be a laminated battery cell, and the protection board 130 can be a printed circuit board.

[0049] In one embodiment of this application, two protrusions 1211 are provided, and the protective plate 130 is located between the two protrusions 1211 along the first direction X.

[0050] In this embodiment, by setting the number of protrusions 1211 to two and placing the protection plate 130 between the two protrusions 1211 along the first direction X, the volume of the battery cell 120 is further increased, the space utilization of the battery cell 120 is further improved, and the capacity of the battery cell 120 is further improved, thereby further improving the battery life of the electronic device 1000.

[0051] like Figure 2 As shown, in one embodiment of this application, the secondary battery 100 further includes a first insulating adhesive layer 140, which wraps around the protrusion 1211.

[0052] In this embodiment, by providing a first insulating adhesive layer 140 that wraps around the protrusion 1211, the protrusion 1211 is provided with insulation protection, thus avoiding the technical problem of short circuit caused by the protrusion 1211 coming into contact with other components.

[0053] For example, the first insulating adhesive layer 140 may be insulating adhesive paper.

[0054] like Figure 2 As shown in the above embodiments of this application, the secondary battery 100 further includes a second insulating adhesive layer 150. The second insulating adhesive layer 150 wraps around the tab 12121 and the protective plate 130, and wraps around the end of the cell 120 near the tab 12121. The second insulating adhesive layer 150 and the first insulating adhesive layer 140 are spaced apart along the first direction X.

[0055] In this embodiment, a second insulating layer 150 is provided to wrap around the tab 12121, the protective plate 130, and the end of the battery cell 120 near the tab 12121, thereby providing insulation protection for the tab 12121, the protective plate 130, and the end of the battery cell 120 near the tab 12121, and preventing short circuits caused by contact between the tab 12121, the protective plate 130, and the end of the battery cell 120 near the tab 12121 and other components.

[0056] For example, the second insulating adhesive layer 150 may be insulating adhesive paper.

[0057] like Figure 2 As shown in the above embodiments of this application, the secondary battery 100 further includes an insulating buffer 160, which abuts against the end of the cell 120 near the tab 12121 and the second insulating adhesive layer 150.

[0058] In this embodiment, by providing an insulating buffer 160 that abuts against the end of the battery cell 120 near the tab 12121 and the second insulating adhesive layer 150, the insulating buffer 160 can provide insulation protection for the end of the battery cell 120 near the tab 12121. On the other hand, the insulating buffer 160 can also reduce the impact force between the protection plate 130 and the battery cell 120, thereby extending the service life of the protection plate 130 and the battery cell 120.

[0059] For example, the insulating buffer 160 may be made of silicone or rubber.

[0060] like Figure 4 , Figure 5 and Figure 6 As shown, in one embodiment of this application, the secondary battery 100 further includes an insulating layer 170, the insulating layer 170 including a first insulating portion 171 and a second insulating portion 172, the first insulating portion 171 being connected to the second insulating portion 172, the first insulating portion 171 being disposed at one end of the protrusion 1211 away from the cell 120, and the second insulating portion 172 being wrapped around the tab 12121 and the protective plate 130.

[0061] In this embodiment, a first insulating portion 171 is provided at the end of the protrusion 1211 away from the battery cell 120 to provide insulation protection for that end, preventing short circuits caused by contact between the protrusion 1211 and other components. Simultaneously, a second insulating portion 172 is provided covering the tab 12121 and the protective plate 130 to provide insulation protection for them, preventing short circuits caused by contact between the tab 12121 and the protective plate 130.

[0062] For example, the first insulating part 171 and the second insulating part 172 are integrally injection molded from plastic material.

[0063] like Figure 2 As shown, in any of the above embodiments of this application, the secondary battery 100 further includes a third insulating adhesive layer 180. Two third insulating adhesive layers 180 are provided, and the two third insulating adhesive layers 180 are respectively wrapped around the two ends of the battery cell 120 along the first direction X.

[0064] In this embodiment, by providing two third insulating adhesive layers 180 respectively wrapped around the two ends of the battery cell 120 along the first direction X, the two ends of the battery cell 120 along the first direction X are provided with insulation protection, thus avoiding the technical problem of short circuit caused by the two ends of the battery cell 120 along the first direction X coming into contact with other components.

[0065] For example, the third insulating layer 180 may be insulating adhesive paper.

[0066] like Figure 2 As shown, in any of the above embodiments of this application, the secondary battery 100 further includes a fourth insulating adhesive layer 190, which wraps around the end of the cell 120 away from the tab 12121.

[0067] In this embodiment, by providing a fourth insulating layer 190 wrapped around the end of the battery cell 120 away from the tab 12121, the end of the battery cell 120 away from the tab 12121 is provided with insulation protection, thus avoiding the technical problem of short circuit caused by the end of the battery cell 120 away from the tab 12121 coming into contact with other components.

[0068] For example, the fourth insulating layer 190 may be insulating adhesive paper.

[0069] Embodiments of this application also provide an electronic device 1000, including the secondary battery 100 in any of the above embodiments.

[0070] The electronic device 1000 has the secondary battery 100 in any of the above embodiments, and therefore has all the beneficial effects of the secondary battery 100, which will not be described in detail here.

[0071] For example, electronic device 1000 can be an electronic product such as a mobile phone, tablet computer, or laptop computer.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A secondary battery, the secondary battery (100) having a first direction (X), a second direction (Y), and a third direction (Z) perpendicular to each other two by two, characterized in that, The secondary battery (100) comprises: an electric core (120) configured as a Z-shaped stepped portion (121) at one end thereof along the third direction (Z), the stepped portion (121) having a convex portion (1211) and a concave portion (1212) provided with a tab (12121); a protection plate (130) arranged on the concave portion (1212) and electrically connected with the tab (12121).

2. The secondary battery according to claim 1, characterized by The convex portion (1211) is provided with two, and the protection plate (130) is located between the two convex portions (1211) along the first direction (X).

3. The secondary battery according to claim 1, characterized by The secondary battery (100) further comprises a first insulating adhesive layer (140) wrapped outside the convex portion (1211).

4. The secondary battery according to claim 3, characterized by The secondary battery (100) further comprises a second insulating adhesive layer (150) wrapped outside the tab (12121) and the protection plate (130), and wrapped outside one end of the electric core (120) close to the tab (12121), the second insulating adhesive layer (150) being arranged apart from the first insulating adhesive layer (140) along the first direction (X).

5. The secondary battery according to claim 4, characterized by The secondary battery (100) further comprises an insulating buffer (160) abutting between one end of the electric core (120) close to the tab (12121) and the second insulating adhesive layer (150).

6. The secondary battery according to claim 1, characterized by The secondary battery (100) further comprises an insulating layer (170) comprising a first insulating portion (171) and a second insulating portion (172), the first insulating portion (171) being connected with the second insulating portion (172), the first insulating portion (171) being arranged at one end of the convex portion (1211) away from the electric core (120), and the second insulating portion (172) being wrapped outside the tab (12121) and the protection plate (130).

7. The secondary battery according to claim 6, characterized by The first insulating portion (171) and the second insulating portion (172) are integrally injection molded by a plastic material.

8. The secondary battery according to any one of claims 1 to 7, characterized by, The secondary battery (100) further comprises a third insulating adhesive layer (180) provided with two, the two third insulating adhesive layers (180) being wrapped outside two ends of the electric core (120) along the first direction (X) respectively.

9. The secondary battery according to any one of claims 1 to 7, characterized by, The secondary battery (100) further comprises a fourth insulating adhesive layer (190) wrapped outside one end of the electric core (120) away from the tab (12121).

10. An electronic device, comprising: The secondary battery (100) comprises the secondary battery (100) according to any one of claims 1 to 9.

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