Secondary battery and electronic equipment

Abstract

The utility model discloses a secondary battery and electronic equipment, and relates to the technical field of batteries. The secondary battery comprises a battery cell, a protection plate and a connecting piece. A top sealing part is arranged at one end, in the third direction, of the battery cell and divides the end, in the third direction, of the battery cell into a first containing space and a second containing space, and the first containing space and the second containing space are located on the two opposite sides, in the second direction, of the top sealing part correspondingly; the battery cell is provided with a tab which extends out of the top sealing part and is bent and extends into the second accommodating space; the protection plate is arranged in the first accommodating space; and the protection plate is electrically connected with the tab through the connecting piece. According to the secondary battery provided by the invention, the overall thickness of the protective plate, the connecting piece, the top sealing part and the tabs can be reduced to the greatest extent, so that the overall thickness of the secondary battery can be thinned to meet the ultrathin requirement.

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 and laptops, are powered by lithium batteries. With the development of electronic devices, users have increasingly higher demands for battery life and thinner designs, leading to a trend towards larger capacity and ultra-thinner lithium batteries. Furthermore, lithium batteries often include a battery protection board, which primarily protects the battery during charging and discharging to extend its lifespan.

[0003] In related technologies, lithium battery cells typically have a top seal at the end, which divides the cell end into a deep pit region and a shallow pit region. The electrode extends from the top seal and bends into the deep pit region. The battery protection board is located in the deep pit region and is electrically connected to the electrode via a connecting tab. However, this structure, where the battery protection board, connecting tab, and electrode are all located in the deep pit region, means that the space in the shallow pit region is not utilized, preventing further reduction in the thickness of the lithium battery's head and thus hindering the overall thinning of the lithium battery. Utility Model Content

[0004] In order to achieve the above objectives, this application aims to provide a secondary battery that solves the technical problem that in the prior art, the battery protection board, connecting piece and tab are all located in the deep pit area, which makes the space in the shallow pit area unutilized, resulting in the inability to further reduce the thickness of the head of the lithium battery, and thus the inability to achieve an ultra-thin overall thickness of the lithium battery.

[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] A battery cell, wherein a top sealing portion is provided at one end along the third direction, the top sealing portion dividing the end of the battery cell along the third direction into a first accommodating space and a second accommodating space, the first accommodating space and the second accommodating space being located on two opposite sides of the top sealing portion along the second direction, and the battery cell is provided with a tab extending out of the top sealing portion and bent into the second accommodating space;

[0008] A protective plate is disposed within the first accommodating space;

[0009] The protective plate is electrically connected to the electrode tab via the connector.

[0010] In one embodiment of the first aspect, the secondary battery further includes a connector, one end of which is disposed within the second receiving space and electrically connected to the tab, and the other end of which is bent and extends into the first receiving space and is electrically connected to the protection plate.

[0011] In one embodiment of the first aspect, the connector includes a first straight segment, a bent segment, and a second straight segment, both the first straight segment and the second straight segment extending along the third direction, the bent segment being connected to the first straight segment and the second straight segment respectively, the first straight segment being disposed within the second accommodating space and electrically connected to the tab, and the second straight segment being disposed within the first accommodating space and electrically connected to the protection plate.

[0012] In one embodiment of the first aspect, the battery cell has a first stepped portion at one end along the first direction.

[0013] In one embodiment of the first aspect, the battery cell has a second stepped portion at one end along the third direction away from the top seal.

[0014] In one embodiment of the first aspect, the protective plate has a component protruding from the side near the top seal, and the top seal has a first clearance groove adapted to the component.

[0015] In one embodiment of the first aspect, the secondary battery further includes an insulating member disposed between the tab and the top seal.

[0016] In one embodiment of the first aspect, the insulating member has a second clearance groove adapted to the component.

[0017] In one embodiment of the first aspect, the depth of the first accommodating space along the second direction is greater than the depth of the first accommodating space along the second direction.

[0018] Secondly, embodiments of this application also provide an electronic device, including the secondary battery described in any of the above embodiments.

[0019] The beneficial effects of this application are as follows: This application proposes a secondary battery and electronic device. The secondary battery includes a cell, a protection board, and a connector. One end of the cell along a third direction has a top seal. The top seal divides the end of the cell along the third direction into a first receiving space and a second receiving space located on two opposite sides of the top seal along a second direction. By extending the tabs of the cell out of the top seal and bending them into the second receiving space, and by placing the protection board, which is electrically connected to the tabs via the connector, in the first receiving space, the protection board and the tabs are respectively located in the first and second receiving spaces. This allows for a maximum reduction in the overall thickness of the protection board, connector, top seal, and tabs, thereby facilitating the ultra-thin design of the secondary battery. The secondary battery provided by this application meets the requirements for ultra-thin design. Attached Figure Description

[0020] 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.

[0021] Figure 1 A perspective view of a secondary battery in some embodiments of this application is shown;

[0022] Figure 2 This application shows a perspective view of the secondary battery without an insulating adhesive layer in some embodiments;

[0023] Figure 3 It shows Figure 2 A three-dimensional schematic diagram omitting the connecting parts;

[0024] Figure 4 This application shows a perspective view of the battery cell in some embodiments;

[0025] Figure 5 This paper shows a three-dimensional schematic diagram of the battery cell from another perspective in some embodiments of this application.

[0026] Explanation of key component symbols:

[0027] 100-Secondary Battery;

[0028] 110 - Battery cell; 111 - First step section; 112 - Top seal section; 1121 - First clearance groove; 113 - First receiving space; 114 - Second receiving space; 115 - Tab;

[0029] 120 - Protection board; 121 - Components;

[0030] 130 - Connector; 131 - First straight segment; 132 - Bending segment; 133 - Second straight segment;

[0031] 140 - Insulating component; 141 - Second clearance groove;

[0032] 150 - First insulating adhesive layer;

[0033] 160 - Second insulating layer;

[0034] 170 - Third insulating layer;

[0035] X - First direction;

[0036] Y - Second direction;

[0037] Z - Third-party orientation. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] like Figures 2 to 5 As shown, an embodiment of this application provides a secondary battery 100, mainly used in electronic devices. 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 cell 110, a protection board 120, and a connector 130.

[0044] The battery cell 110 has a top sealing portion 112 at one end along the third direction Z. The top sealing portion 112 divides the battery cell 110 at one end along the third direction Z to form a first receiving space 113 and a second receiving space 114. The first receiving space 113 and the second receiving space 114 are respectively located on two opposite sides of the top sealing portion 112 along the second direction Y. The battery cell 110 is provided with a tab 115 extending out of the top sealing portion 112 and bent into the second receiving space 114. The protection plate 120 is disposed in the first receiving space 113 and is electrically connected to the tab 115 through the connector 130.

[0045] The secondary battery 100 provided in this application extends the tab 115 of the cell 110 out of the top seal 112 and bends it into the second receiving space 114. A protection plate 120, electrically connected to the tab 115 via a connector 130, is disposed within a first receiving space 113. This arrangement, with the protection plate 120 and tab 115 respectively located in the first and second receiving spaces 113 and 114, maximizes the reduction of the overall thickness of the protection plate 120, connector 130, top seal 112, and tab 115, thereby facilitating the ultra-thinning of the secondary battery 100. The secondary battery 100 provided in this application meets the requirements for ultra-thinning. It avoids the technical problem in the prior art where the battery protection plate, connector, and tab are all located in the deep pit area, resulting in unutilized space in the shallow pit area, which prevents further reduction of the lithium battery's head thickness and thus hinders the ultra-thinning of the overall lithium battery thickness.

[0046] For example, the battery cell 110 can be a laminated battery cell 110, and the protection board 120 can be a printed circuit board. The first accommodating space 113 can be a deep pit area, and the second accommodating space 114 can be a shallow pit area, that is, the depth of the first accommodating space 113 along the second direction Y is greater than the depth of the first accommodating space 113 along the second direction Y.

[0047] like Figure 2 As shown, in one embodiment of this application, the secondary battery 100 further includes a connector 130. One end of the connector 130 is disposed in the second accommodating space 114 and electrically connected to the tab 115. The other end of the connector 130 away from the tab 115 is bent and extends into the first accommodating space 113 and is electrically connected to the protection plate 120.

[0048] In this embodiment, by electrically connecting the connector 130 to the tab 115 and the protection plate 120 respectively, the protection plate 120 is electrically connected to the tab 115 through the connector 130, thereby realizing the electrical connection between the protection plate 120 and the battery cell 110.

[0049] Meanwhile, by placing one end of the connector 130 in the second receiving space 114 and bending the end of the connector 130 away from the tab 115 to extend it into the first receiving space 113, so that both ends of the connector 130 are respectively placed in the first receiving space 113 and the second receiving space 114, the overall thickness of the protection plate 120, connector 130, top seal 112 and tab 115 can be reduced to the greatest extent, which is conducive to the overall thinning of the secondary battery 100.

[0050] For example, the connector 130 can be a nickel sheet, and the connector 130 can be electrically connected to the tab 115 and the protective plate 120 by welding. In addition, the connector 130 can also be made of other soft, easily shaped metals or metal composite materials to form a U-shaped structure to achieve a conductive connection from the first receiving space 113 to the second receiving space 114.

[0051] like Figure 2 As shown in the above embodiments of this application, the connector 130 includes a first straight segment 131, a bent segment 132, and a second straight segment 133. Both the first straight segment 131 and the second straight segment 133 extend along the third direction Z. The bent segment 132 is connected to both the first straight segment 131 and the second straight segment 133. The first straight segment 131 is disposed within the second receiving space 114 and electrically connected to the tab 115. The second straight segment 133 is disposed within the first receiving space 113 and electrically connected to the protective plate 120. Thus, the connector 130 is constructed in a U-shape, achieving a conductive connection from the first receiving space 113 to the second receiving space 114.

[0052] For example, the first straight segment 131, the bent segment 132, and the second straight segment 133 can be integrally formed by stamping or sheet metal bending.

[0053] like Figure 4 As shown, in one embodiment of this application, the battery cell 110 has a first step portion 111 at one end along the first direction X.

[0054] In this embodiment, by providing a first step portion 111 at one end of the battery cell 110 along the first direction X, the battery compartment space of the electronic device is fully utilized, effectively increasing the volume of the battery cell 110, thereby improving the capacity of the secondary battery 100. Thus, the secondary battery 100 can not only meet the requirements for ultra-thin design but also the requirements for high-capacity battery life.

[0055] In one embodiment of this application, the battery cell 110 has a second stepped portion at one end away from the top seal portion 112 along the third direction Z.

[0056] In this embodiment, by providing a second stepped portion at the end of the cell 110 furthest from the top seal 112 along the third direction Z, the battery compartment space of the electronic device is fully utilized, effectively increasing the volume of the cell 110, thereby improving the capacity of the secondary battery 100. Thus, the secondary battery 100 can not only meet the requirements for ultra-thin design but also the requirements for high-capacity battery life.

[0057] It should be noted that in order to construct the stepped portion of the battery cell body to form an irregular shape, and thus fully utilize the irregular space during assembly with the battery compartment of electronic devices to increase battery capacity, a lamination process can be used to manufacture the battery cell. Based on the aforementioned objective, electrode sheets of different sizes can be selected and grouped and stacked according to the location and distribution of the stepped portion. Specifically, the battery cell in this application is a lamination cell. This lamination cell has two electrode sizes. During manufacturing, the larger electrode sheets are first stacked into groups, and then the smaller electrode sheets are stacked onto the larger electrode sheet groups, thereby enabling the electrode layer groups to form the aforementioned stepped portion. Finally, it is encapsulated using an aluminum-plastic film.

[0058] like Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of this application, the protective plate 120 has a component 121 protruding from the side near the top sealing portion 112, and the top sealing portion 112 has a first clearance groove 1121 adapted to the component 121.

[0059] In this embodiment, a component 121 is protruding from the side of the protective plate 120 near the top seal 112. By opening a first clearance groove 1121 on the top seal 112 that is compatible with the component 121, the component 121 is cleared, so that the component 121 can be placed in the first clearance groove 1121 or placed in the second receiving space 114 through the first clearance groove 1121. This further reduces the overall thickness of the protective plate 120, the top seal 112 and the tab 115, and further facilitates the overall thinning of the secondary battery 100.

[0060] like Figure 2 and Figure 3 As shown in the above embodiments of this application, the secondary battery 100 further includes an insulating member 140, which is disposed between the tab 115 and the top seal 112.

[0061] In this embodiment, by providing an insulating member 140 between the tab 115 and the top seal 112, the technical problem of preventing the tab 115 from contacting other components and causing a short circuit is avoided by the insulating isolation effect of the insulating member 140.

[0062] like Figure 2 and Figure 3 As shown, in the above embodiments of this application, the insulating member 140 is provided with a second clearance groove 141 that is adapted to the component 121.

[0063] In this embodiment, by opening a second clearance groove 141 on the insulating member 140 that is compatible with the component 121, the component 121 is provided to avoid the component 121. This allows the component 121 to be disposed in the first clearance groove 1121, the second clearance groove 141, or to pass through the first clearance groove 1121 and the second clearance groove 141 and be disposed in the second receiving space 114. This further reduces the overall thickness of the protective plate 120, the top seal 112, and the tab 115, thereby further facilitating the ultra-thinning of the overall thickness of the secondary battery 100.

[0064] like Figure 1 As shown, in any of the above embodiments of this application, the secondary battery 100 further includes a first insulating adhesive layer 150, which wraps around the protective plate 120 and the tab 115.

[0065] In this embodiment, by providing a first insulating adhesive layer 150 wrapped around the protective plate 120 and the tab 115, the protective plate 120 and the tab 115 are provided with insulation protection, thus avoiding the technical problem of short circuit caused by the protective plate 120 and the tab 115 coming into contact with other components.

[0066] For example, the first insulating adhesive layer 150 may be insulating adhesive paper.

[0067] like Figure 1 As shown, in any of the above embodiments of this application, the secondary battery 100 further includes a second insulating adhesive layer 160, which wraps around the first stepped portion 111.

[0068] In this embodiment, by providing a second insulating adhesive layer 160 wrapped around the first step portion 111, the step portion 111 is provided with insulation protection, thus avoiding the technical problem of short circuit caused by the first step portion 111 coming into contact with other components.

[0069] For example, the second insulating adhesive layer 160 may be insulating adhesive paper.

[0070] like Figure 1 As shown, in any of the above embodiments of this application, the secondary battery 100 further includes a third insulating adhesive layer 170, which wraps around the end of the cell 110 away from the first step portion 111 along the first direction X.

[0071] In this embodiment, by providing a third insulating layer 170 that wraps around the end of the battery cell 110 away from the first step portion 111 along the first direction X, the end of the battery cell 110 away from the first step portion 111 along the first direction X is provided with insulation protection, thus avoiding the technical problem of short circuit caused by the end of the battery cell 110 away from the first step portion 111 along the first direction X coming into contact with other components.

[0072] For example, the third insulating layer 170 may be insulating adhesive paper.

[0073] Embodiments of this application also provide an electronic device, including the secondary battery 100 in any of the above embodiments.

[0074] The electronic device 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.

[0075] For example, electronic devices can be mobile phones, tablets, laptops, and other electronic products.

[0076] 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.

[0077] 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, said secondary battery (100) having a first direction (X), a second direction (Y), and a third direction (Z) that are perpendicular to each other, characterized in that, The secondary battery (100) includes: A battery cell (110) has a top sealing portion (112) at one end along the third direction (Z). The top sealing portion (112) divides the end of the battery cell (110) along the third direction (Z) to form a first receiving space (113) and a second receiving space (114). The first receiving space (113) and the second receiving space (114) are respectively located on two opposite sides of the top sealing portion (112) along the second direction (Y). The battery cell (110) is provided with a tab (115) extending out of the top sealing portion (112) and bent to extend into the second receiving space (114). A protective plate (120) is disposed within the first accommodating space (113); The connector (130) is used to electrically connect the protection plate (120) to the electrode (115).

2. The secondary battery according to claim 1, characterized by One end of the connector (130) is disposed in the second accommodating space (114) and electrically connected to the tab (115). The end of the connector (130) away from the tab (115) is bent and extended into the first accommodating space (113) and electrically connected to the protective plate (120).

3. The secondary battery according to claim 2, characterized by The connector (130) includes a first straight section (131), a bent section (132), and a second straight section (133). The first straight section (131) and the second straight section (133) both extend along the third direction (Z). The bent section (132) is connected to the first straight section (131) and the second straight section (133) respectively. The first straight section (131) is disposed in the second accommodating space (114) and electrically connected to the tab (115). The second straight section (133) is disposed in the first accommodating space (113) and electrically connected to the protective plate (120).

4. The secondary battery according to claim 1, characterized by The battery cell (110) has a first stepped portion (111) at one end along the first direction (X).

5. The secondary battery according to claim 1, characterized by The battery cell (110) has a second stepped portion at one end along the third direction (Z) away from the top seal portion (112).

6. The secondary battery according to claim 1, characterized by The protective plate (120) has a component (121) protruding from the side near the top sealing part (112), and the top sealing part (112) has a first clearance groove (1121) adapted to the component (121).

7. The secondary battery according to claim 6, characterized by The secondary battery (100) also includes an insulating member (140), which is disposed between the tab (115) and the top seal (112).

8. The secondary battery according to claim 7, characterized by The insulating component (140) has a second clearance groove (141) adapted to the component (121).

9. The secondary battery according to claim 1, characterized by The depth of the first accommodating space (113) along the second direction (Y) is greater than the depth of the first accommodating space (113) along the second direction (Y).

10. An electronic device, characterized in that, The secondary battery (100) includes any one of claims 1 to 9.

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