Battery, electronic product and electric equipment

Abstract

The utility model relates to the field of arc batteries, and discloses a battery, an electronic product and electric equipment. A combined battery core body is sealed in the battery shell, a laminated battery core body of the combined battery core body comprises a plurality of laminated positive plates and negative plates, positive tabs of the positive plates and negative tabs of the negative plates respectively extend out of the outer side of the laminated battery core body in a laminated manner, and a winding battery core body is formed by winding the laminated positive plates, diaphragms and negative plates; the winding battery core body is laminated on the top surface or the bottom surface of the laminated battery core body and serves as the top and / or the bottom of the combined battery core body, the surface, opposite to the laminated battery core body, of the winding battery core body is a cylindrical curved surface attached to the inner wall of the shell, and a positive pole lug of the winding battery core body and a laminated positive pole lug of the laminated battery core body are vertically aligned and welded together to form a positive pole of the battery; and the negative tab of the winding battery core body and the laminated negative tab of the laminated battery core body are aligned up and down, are welded together to form the negative electrode of the battery, and are electrically connected with the negative electrode of the shell.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing, and in particular to a battery, electronic product, and electric device. Background Technology

[0002] With the development of new energy sources, lithium-ion batteries are increasingly widely used in various electronic products and electric devices, and battery capacity is an important parameter that users are concerned about. Battery capacity is often limited by the battery compartment of electronic products or electric devices.

[0003] During the research of this invention, the inventors discovered that when one side of the battery compartment is a cylindrical curved surface, existing technologies such as cylindrical wound batteries and square stacked batteries cannot fully utilize the space of the battery compartment. Summary of the Invention

[0004] One of the objectives of this utility model is to provide batteries, electronic products, and electric devices, the application of which is beneficial to improving the space utilization rate of the battery compartment.

[0005] In a first aspect, this embodiment provides a battery comprising a casing, within which an assembled battery cell is sealed.

[0006] The combined battery cell includes:

[0007] A laminated battery cell includes a plurality of stacked positive and negative electrode plates, with a separator layer separating any two adjacent positive and negative electrode plates. The positive tabs of each positive electrode plate and the negative tabs of each negative electrode plate are stacked and extend outward from the outer side of the laminated battery cell.

[0008] A wound battery cell is formed by winding layers of positive electrode sheets, separators, and negative electrode sheets. These layers are stacked on the top or bottom surface of the laminated battery cell, serving as the top and / or bottom of the combined battery cell. The surface of the wound battery cell that faces away from the laminated battery cell is a cylindrical curved surface that adheres to the inner wall of the housing.

[0009] The positive electrode tab of the wound battery cell is aligned vertically with the stacked positive electrode tabs of the laminated battery cell, and welded together to form the positive electrode of the battery, which is electrically connected to the positive electrode of the casing.

[0010] The negative electrode tabs of the wound battery cell are aligned vertically with the stacked negative electrode tabs of the laminated battery cell and welded together to form the negative electrode of the battery, which is electrically connected to the negative electrode of the casing.

[0011] Optionally, the housing is an aluminum-plastic film housing.

[0012] Optionally, each of the positive electrode plates in the stacked battery cell is encapsulated in a separate separator bag, and each of the positive electrode tabs extends from its respective separator bag. Specifically, the stacking of the positive and negative electrode plates involves…

[0013] Each of the diaphragm bags containing the positive electrode is stacked with each of the negative electrode sheets.

[0014] Optionally, the opposing surfaces of the wound battery cell and the stacked battery cell are tightly fitted together.

[0015] Optionally, the combined battery cell includes two wound battery cells, which are respectively stacked on the top and bottom surfaces of the laminated battery cells, serving as the top and bottom of the combined battery cell.

[0016] The opposing surfaces of the two wound and stacked battery cells are cylindrical curved surfaces that are in contact with the opposite inner walls of the housing.

[0017] Optionally, the laminated cell is a lithium-ion laminated cell.

[0018] The wound battery cell is a lithium-ion wound battery cell.

[0019] Optionally, an adhesive layer is also bonded between the contact surfaces of the wound battery cell and the laminated battery cell.

[0020] Secondly, an electronic product provided by this utility model embodiment includes a battery compartment, wherein at least one side of the battery compartment is a cylindrical curved surface.

[0021] In any of the above-described batteries, the cylindrical curved surface of the battery is in contact with the cylindrical curved surface of the battery compartment.

[0022] Thirdly, the electric device provided in this embodiment of the present invention is characterized by comprising a battery compartment, wherein at least one side of the battery compartment is a cylindrical curved surface.

[0023] In any of the above-described batteries, the cylindrical curved surface of the battery is in contact with the cylindrical curved surface of the battery compartment.

[0024] As can be seen from the above, the battery made by the technical solution of this embodiment is particularly suitable for battery compartments with a cylindrical curved surface on one side, and its application can make full use of the space inside the battery compartment to increase the battery capacity. Attached Figure Description

[0025] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, do not constitute an undue limitation of the present invention.

[0026] Figure 1 A three-dimensional structural diagram of the battery cell assembly provided in an embodiment of this utility model;

[0027] Figure 2 A schematic diagram of the front end structure of the battery cell assembly provided in this embodiment of the present invention;

[0028] Figure 3 A side view of the combined battery cell provided in an embodiment of this utility model;

[0029] Figure 4 A top view of the combined battery cell structure provided in an embodiment of this utility model;

[0030] Figure 5 A three-dimensional structural diagram of the battery provided in an embodiment of this utility model;

[0031] Figure 6 This is a side view of another combined battery cell provided in an embodiment of the present invention.

[0032] 1: Shell;

[0033] 2: Composite cell body; 21: Laminated cell body; 22: Winded cell body;

[0034] 31: Positive electrode cluster; 32: Negative electrode cluster;

[0035] 41: Positive terminal of the battery; 42: Negative terminal of the battery. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0037] Examples of embodiments of the present invention described in detail below 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.

[0038] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, but should not be construed as limiting the invention. In the description of the invention, it should be understood that terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the invention 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 limiting the invention.

[0039] Furthermore, the terms "" 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 with "" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this invention, unless otherwise explicitly 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 invention according to the specific circumstances. Example

[0041] See Figure 1-6 .

[0042] This embodiment provides a battery, which may be, but is not limited to, a lithium-ion battery. The battery includes a housing 1, and a combined battery cell 2 sealed inside the housing 1. In this embodiment, the combined battery cell 2 includes a stack of battery cells 21 and at least one wound battery cell 22 (this embodiment illustrates a wound battery cell 22).

[0043] The laminated battery cell 21 includes a plurality of stacked positive and negative electrode sheets. A separator layer is spaced between any two adjacent positive and negative electrode sheets. The positive tabs of each positive electrode sheet extend outward from the outer side of the laminated battery cell 21, stacked vertically and facing each other, forming a positive tab cluster 31. The negative tabs of each negative electrode sheet also extend outward from the outer side of the laminated battery cell 21, stacked vertically and facing each other, forming a negative tab cluster 32. This embodiment illustrates that the positive tab cluster 31 and the negative tab cluster 32 extend from the same width end of the laminated battery cell 21, but it is not limited to this. For example, one of them can extend from one width end of the laminated battery cell 21, and the other can extend from the other width end of the laminated battery cell 21.

[0044] The wound cell body 22 is formed by winding stacked positive electrode sheets, separators, and negative electrode sheets from the inside out using a winding needle. In this embodiment, the wound cell body 22 is flattened so that its bottom surface is in contact with the top surface (or bottom surface, hereinafter referred to as the top surface) of the stacked cell body 21. The top surface serves as the top surface of the combined cell, and the top surface of the combined cell is a curved surface of the original cylindrical shape.

[0045] As an illustration of this embodiment, adhesive can be pre-applied to the top surface of the stacked cell body 21, and then the wound cell body 22 can be flattened on its top surface by cold pressing, so that the bottom surface of the wound cell body 22 is pressed into a flat shape and fully adheres to and contacts the top surface of the stacked cell body 21. The adhesive solidifies and firmly fixes the wound cell body 22 to the top surface of the stacked cell body 21, serving as the top of the assembled cell.

[0046] In this embodiment, the surface dimensions for the contact between the wound cell 22 and the stacked cell 21 can be designed according to the shape of the cylindrical curved surface of the battery compartment. For example, but not limited to, the dimensions and shapes of the flattened bottom surface of the wound cell 22 and the top surface of the stacked cell 21 can be made completely consistent. Alternatively, but not limited to, the flattened bottom surface of the wound cell 22 can be narrower than the top surface of the stacked cell 21, and vice versa. No limitation is made here.

[0047] At this time, the positive electrode tab of the wound cell 22 is aligned vertically with the positive electrode tab cluster 31 of the stacked cell 21 and welded together to form the positive electrode 41 of the battery, or led out to the outer casing through an external electrode tab to form the positive electrode 41 of the battery; the negative electrode tab of the wound cell 22 is aligned vertically with the negative electrode tab cluster 32 of the stacked cell 21 and welded together to form the negative electrode 42 of the battery, or led out to the outer casing through an external electrode tab to form the negative electrode 42 of the battery.

[0048] In this embodiment, the housing 1 can be a rigid housing 1 or a soft-pack aluminum-plastic film housing 1. In this embodiment, the aluminum-plastic film housing 1 with good plasticity is used as an example. The inner wall of the aluminum-plastic film housing 1 is in close contact with the outer shape of the combined battery cell 2.

[0049] As can be seen from the above, the battery made by the technical solution of this embodiment is particularly suitable for battery compartments with a cylindrical curved surface on one side, and its application can make full use of the space inside the battery compartment to increase the battery capacity.

[0050] When the battery in this embodiment is preferably a lithium-ion battery, its stacked cell 21 is a lithium-ion stacked cell 21, and its wound cell 22 is a lithium-ion wound cell 22. The positive active material of the positive active material layer of the stacked cell 21 and the wound cell 22 is the same, and the negative active material of the negative electrode is the same.

[0051] When both opposite sides of the battery compartment are cylindrical curved surfaces, see Figure 6 As shown, when the top and bottom surfaces of the stacked cell body 21 are both cylindrical curved surfaces, the combined cell body 2 in this embodiment includes a stacked cell body 21 and two wound cell bodies 22, with the two wound cell bodies 22 respectively tightly attached to the top and bottom surfaces of the stacked cell body 21. At this time, the top and bottom surfaces of the battery casing 1 are cylindrical curved surfaces that are in contact with the top and bottom surfaces of the combined cell body.

[0052] As an illustration of this embodiment, the positive electrode in the stacked cell 21 of this embodiment adopts the positive electrode bagging process. Specifically, the positive electrode is placed between two separator layers, and its tabs extend from the edges of the two separator layers. The edges of the two separator layers are heat-sealed to form a separator bag, which confines the positive electrode between the two separator layers, and the tabs extend from the separator bag.

[0053] During the stacking process, the separator bags containing the positive electrode plates are sequentially stacked with the negative electrode plates to obtain the stacked battery cell body 21.

[0054] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.

Claims

1. A battery characterized by, The battery comprises a shell, a combined cell body sealed in the shell, The combined cell body comprises: A laminated cell body comprising a plurality of laminated positive electrode sheets, negative electrode sheets, and diaphragm layers spaced between any two adjacent positive electrode sheets and negative electrode sheets, and positive electrode tabs of each positive electrode sheet and negative electrode tabs of each negative electrode sheet are respectively laminated and protrude outside the laminated cell body, A wound cell body formed by winding the laminated positive electrode sheets, diaphragm, and negative electrode sheets, laminated on the top surface or bottom surface of the laminated cell body as the top and / or bottom of the combined cell body, and the surface of the wound cell body opposite to the laminated cell body is a cylindrical curved surface attached to the inner wall of the shell, The positive electrode tabs of the wound cell body are aligned with the laminated positive electrode tabs of the laminated cell body and welded together to form the positive electrode of the battery and electrically connected to the positive electrode of the shell, The negative electrode tabs of the wound cell body are aligned with the laminated negative electrode tabs of the laminated cell body and welded together to form the negative electrode of the battery and electrically connected to the negative electrode of the shell.

2. The battery according to claim 1, wherein The shell is an aluminum plastic film shell.

3. The battery according to claim 1, wherein Each of the positive electrode sheets in the laminated cell body is respectively packaged in each diaphragm bag, and each of the positive electrode tabs respectively protrudes from the diaphragm bag where it is located, and the laminated positive electrode sheets and negative electrode sheets are, Each of the diaphragm bags packaged with the positive electrode sheets is respectively laminated with each of the negative electrode sheets.

4. The battery according to claim 1, wherein The opposite surfaces between the wound cell body and the laminated cell body are closely attached.

5. The battery according to claim 1, wherein The combined cell body comprises two wound cell bodies respectively laminated on the top surface and the bottom surface of the laminated cell body as the top and the bottom of the combined cell body, The opposite surfaces of the two wound cell bodies opposite to the laminated cell body are respectively cylindrical curved surfaces attached to the opposite inner walls of the shell.

6. The battery according to claim 1, wherein The laminated cell body is a lithium ion laminated cell body, The wound cell body is a lithium ion wound cell body.

7. The battery according to claim 1, wherein A glue layer is further combined between the attached surfaces of the wound cell body and the laminated cell body.

8. An electronic product, characterized by The battery comprises a battery compartment, at least one side of the battery compartment is a cylindrical curved surface, The battery according to any one of claims 1 to 7, the cylindrical curved surface of the battery is attached to the cylindrical curved surface of the battery compartment.

9. An electrically powered device, characterised in that, The battery comprises a battery compartment, at least one side of the battery compartment is a cylindrical curved surface, The battery according to any one of claims 1 to 7, the cylindrical curved surface of the battery is attached to the cylindrical curved surface of the battery compartment.

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