Arc-shaped battery and electronic product

Abstract

The utility model relates to the field of arc-shaped batteries, and discloses an arc-shaped battery which is not easy to deform and convenient to use, and an electronic product. The battery comprises an aluminum-plastic film lithium ion battery which is arc-shaped along the length direction, two electrodes respectively extend out of the width end part of the aluminum-plastic film lithium ion battery, the thickness of the aluminum-plastic film lithium ion battery is equal to the distance between an inner arc and an outer arc, and a rigid shell which is provided with an inner cavity which is arc-shaped along the length direction, the width end part of the rigid shell is provided with electrode extending holes, one side of the rigid shell in the length direction is provided with a lateral opening, the aluminum-plastic film lithium ion battery enters the inner cavity from the lateral opening and is accommodated in the inner cavity, the tail ends of the two electrodes respectively extend out of the width end part of the rigid shell from the electrode extending holes, and the width end part of the rigid shell is provided with the electrode extending holes. And the rigid shell cover is packaged at the lateral opening. The arc-shaped battery is not easy to deform and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing, and in particular to an arc-shaped battery and electronic product. Background Technology

[0002] As smart wearable products become more widely used, the demand for rechargeable batteries is also increasing. The requirements for battery shape and size are becoming more stringent.

[0003] During the research process of this invention, the inventors discovered that the curvature of a soft-pack arc-shaped battery changes when it encounters external force, which causes problems for the application of the battery. Summary of the Invention

[0004] One of the objectives of this utility model embodiment is to provide an arc-shaped battery and electronic product that is not easily deformed and is easy to use, and whose preparation is easy and installation is convenient.

[0005] In a first aspect, this embodiment provides an arc-shaped battery, comprising,

[0006] The aluminum-plastic film lithium-ion battery is arc-shaped along its length, with two electrodes extending from the wide end of the battery. The thickness of the aluminum-plastic film lithium-ion battery is the distance between the inner and outer arcs.

[0007] A rigid housing has an inner cavity that is arc-shaped along its length, and an electrode protrusion hole is provided at the wide end of the rigid housing.

[0008] One side of the rigid shell along its length is a lateral opening. The two length edges of the lateral opening are two arc-shaped length edges located on the same plane of the rigid shell, one of which is an inner arc edge and the other is an outer arc edge. The two width edges are the two height edges of the rigid shell.

[0009] The aluminum-plastic film lithium-ion battery enters the inner cavity through the side opening and is housed within the inner cavity. The ends of the two electrodes extend from the electrode extension holes to the width ends of the rigid casing.

[0010] A rigid shell cover is encapsulated at the lateral opening. The shell cover is a flat plate, one of the two length edges of the flat plate being an inner arc edge and the other being an outer arc edge. The inner arc edge and the outer arc edge of the flat plate are respectively connected to the inner arc edge and the outer arc edge of the lateral opening. The two width edges of the flat plate are respectively connected to the two width edges of the lateral opening.

[0011] Optionally, a charge / discharge protection circuit module is electrically connected between the electrodes of the cell body of the aluminum-plastic film lithium-ion battery and the two electrodes extending from the wide end, and the charge / discharge protection circuit module is encapsulated in the aluminum-plastic film shell of the aluminum-plastic film lithium-ion battery.

[0012] Optionally, two independent chambers are formed within the aluminum-plastic film housing, with the laminated battery cell and electrolyte sealed in one chamber and the charge / discharge protection circuit module sealed in the other chamber.

[0013] Optionally, the electrode protrusion hole is further filled with a waterproof colloid, and the two electrodes are spaced apart by the waterproof colloid, which seals the electrode protrusion hole.

[0014] Optionally, the rigid housing and the housing cover are made of plastic; or,

[0015] The rigid housing and the cover are metal parts.

[0016] Optionally, the aluminum-plastic film lithium-ion battery includes,

[0017] Laminated battery cell body and aluminum-plastic film, wherein the laminated battery cell body

[0018] A recess matching the shape of the arc-shaped battery is formed on the aluminum-plastic film. The bottom surface of the recess is arc-shaped along its length, and the two arc-shaped long edges of the open end of the recess are parallel to the bottom surface of the recess. The stacked battery cell is confined within the recess.

[0019] The aluminum-plastic film extending beyond the first arc-shaped length edge of the opening in the recess is folded along the first arc-shaped length edge, completely covering the opening of the recess, and adhering to the aluminum-plastic film extending beyond the second arc-shaped length edge and both width edges of the opening in the recess, forming heat-sealing areas at the two width edges and the second arc-shaped length edge of the opening in the recess, respectively.

[0020] In each of the heat-sealing areas, the surfaces of the two aluminum-plastic films that are in contact are heat-sealed together. The ends of the electrodes of the stacked battery cell extend from the heat-sealing area at the wide end. The electrodes are sealed together with the heat-sealing area. The stacked battery cell is sealed inside the aluminum-plastic film housing.

[0021] The two electrodes of the laminated battery cell extend from the width portion of the aluminum-plastic film housing.

[0022] Secondly, an electronic product provided in this embodiment of the utility model includes,

[0023] Any of the above-mentioned arc-shaped batteries,

[0024] The driving circuit is electrically connected to the two electrodes of the arc-shaped battery.

[0025] As can be seen from the above, by adopting the technical solution of this embodiment, the soft-pack aluminum-plastic film lithium-ion battery is inserted into the inner cavity of the rigid shell through the lateral opening of the rigid shell which is arc-shaped along the length direction. The end section of the electrode extends out of the electrode through hole at the wide end of the rigid shell. Then, the lateral opening is sealed with a shell cover, and the soft-pack aluminum-plastic film lithium-ion battery is encapsulated in the arc-shaped rigid shell whose shape matches the soft-pack aluminum-plastic film lithium-ion battery. This increases the rigidity of the arc-shaped battery and avoids the problem that the lithium-ion battery is easily deformed during operation or use, which would cause its shape to be mismatched with the shape of the assembly space reserved on the electronic product and affect its application. Attached Figure Description

[0026] 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.

[0027] Figure 1 , 2 These are exploded structural diagrams of an arc-shaped battery provided in Embodiment 1 of this utility model;

[0028] Figure 3 , 4 They are respectively Figure 1 , 2 A three-dimensional structural diagram of the arc-shaped battery shown.

[0029] Figure 5 This is an exploded structural diagram of another arc-shaped battery provided in Embodiment 1 of this utility model;

[0030] Figure 6 for Figure 5 A three-dimensional structural diagram of the arc-shaped battery shown.

[0031] Figures 7-8 These are three-dimensional structural schematic diagrams of an arc-shaped battery provided in Embodiment 2 of this utility model;

[0032] Figure 9 , 10 This is a three-dimensional structural diagram of another arc-shaped battery provided in Embodiment 2 of this utility model;

[0033] Figure 11 , 12 This is a three-dimensional structural diagram of another arc-shaped battery provided in Embodiment 2 of this utility model;

[0034] Figure 13 , 14 This is a three-dimensional structural diagram of another arc-shaped battery provided in Embodiment 2 of this utility model.

[0035] 1: Electrode; 2: Recess;

[0036] 3: Aluminum-plastic film lithium-ion battery; 31: Aluminum-plastic film casing;

[0037] 4: Rigid housing; 41: Lateral opening; 42: Electrode protrusion hole.

[0038] 5: Shell cover; 6: Charge / discharge protection circuit module. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[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 invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] 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

[0044] See Figures 1-6 As shown,

[0045] This embodiment provides an arc-shaped battery, which mainly includes an aluminum-plastic film lithium-ion battery 3, a rigid casing 4, and a casing cover 5.

[0046] The aluminum-plastic film lithium-ion battery 3 is a soft-pack lithium-ion battery. The inner wall of the soft-pack lithium-ion battery protects the stacked battery cells and the electrolyte or electrolyte solution immersed between the stacked battery cells. During stacking, the cells are stacked on an arc-shaped mold, allowing the sides of each electrode to naturally droop, forming an arc-shaped stacked battery cell. This naturally formed arc-shaped stacked battery cell is then encapsulated with an aluminum-plastic film, so that the end of electrode 1 extends from between the aluminum-plastic film layers. Adhesive tape is attached to both surfaces of electrode 1, and the tape is heat-sealed to the adhesive layer on the aluminum-plastic film surface on both sides. The end of electrode 1 extends outside the aluminum-plastic film shell 31. The resulting soft-pack lithium-ion battery is arc-shaped along its length, with two opposite surfaces connecting the two ends of the battery's thickness being curved surfaces. The intersection line between the two curved surfaces formed by the height and length of the soft-pack battery is an arc line.

[0047] The rigid housing 4 has an inner cavity whose shape matches the outer shape of the aluminum-plastic film lithium-ion battery 3. The inner cavity has a lateral opening 31 on one side of the rigid housing 4 along its length. The width of the lateral opening 31 corresponds to the thickness of the aluminum-plastic film lithium-ion battery 3. The two long edges of the lateral opening 31 are arc-shaped, one of which is an inner arc and the other is an outer arc.

[0048] An electrode protrusion hole 42 is provided at the wide end of the rigid housing 4. During assembly, the side of the aluminum-plastic film lithium-ion battery 3 is aligned with the side opening 31, and the wide end with the protruding electrode 1 is inserted into the inner cavity through the side opening 31 of the rigid housing 4, so that the protruding electrode 1 extends out of the wide end of the rigid housing 4 through the electrode protrusion hole 42. The aluminum-plastic film lithium-ion battery 3 is completely accommodated in the inner cavity from the side opening 31. A rigid housing cover 5 is sealed at the side opening 31 to encapsulate the aluminum-plastic film lithium-ion battery 3 inside the rigid housing 4.

[0049] As can be seen from the above, by adopting the technical solution of this embodiment, the soft-pack aluminum-plastic film lithium-ion battery 3 is inserted into the inner cavity of the rigid housing 4 through the side opening 31 of the rigid housing 4 which is arc-shaped along the length direction. The end section of the electrode 1 extends out of the through hole at the wide end of the rigid housing 4 and extends outside the wide end of the rigid housing 4. Then, the side opening 31 is sealed with the shell cover 5, and the soft-pack aluminum-plastic film lithium-ion battery 3 is encapsulated in the arc-shaped rigid housing 4 whose shape matches the soft-pack aluminum-plastic film lithium-ion battery 3. This increases the rigidity of the arc-shaped battery and avoids the problem that the lithium-ion battery is easily deformed during operation or use, which would cause its shape to be mismatched with the shape of the assembly space reserved on the electronic product and affect its application.

[0050] See Figures 1-3As shown in the illustration of this embodiment, the lateral opening 31 is located on a planar side of the rigid shell 4, specifically on the side formed by the length edge and the height edge. Two opposite edges of the lateral opening 31 are opposite width ends, and the other two opposite edges are arc-shaped, one being an outer arc and the other an inner arc. Correspondingly, the shell cover 5 is a flat plate, with one of its two length edges being an inner arc edge and the other an outer arc edge. The inner and outer arc edges of the flat plate are connected to the inner and outer arc edges of the lateral opening 31, respectively. The two width edges of the flat plate are connected to the two width edges of the lateral opening 31, respectively. The lateral opening 31 for inserting the soft-pack aluminum-plastic film lithium-ion battery 3 is located on the side formed by the thickness and length edges. The shape of the lateral opening 31 is consistent with the shape of the aluminum-plastic film lithium-ion battery 3, making it more convenient to insert the aluminum-plastic film lithium-ion battery 3. Furthermore, the lateral opening 31 and the corresponding shell cover 5 are both planar, making the fabrication of the shell and shell cover 5 easy and convenient to install.

[0051] See Figure 5 As shown in the illustration, in this embodiment, the curved surface containing the inner arc or the curved surface containing the outer arc of the rigid shell 4 is used as the lateral opening 31. The two length edges of the lateral opening 31 are the two arc-shaped length edges located on the same curved surface of the rigid shell 4, and the two width edges of the lateral opening 31 are the two width edges of the rigid shell 4. Correspondingly, the corresponding shell cover 5 is a curved panel corresponding to the lateral opening 31. The two length edges of the curved panel are arc-shaped. During encapsulation, the two arc-shaped edges of the curved panel are connected to the two arc-shaped length edges of the lateral opening 31, and the two width edges of the curved panel are connected to the two width edges of the lateral opening 31. The curved shell cover 5 is encapsulated on the rigid shell 4, forming a curved surface parallel to the curved surface of the shell bottom of the rigid shell 4. For example, when the shell bottom is located on the inner arc side, the shell cover 5 is located on the outer arc side; conversely, a symmetrical relationship is also formed.

[0052] As an illustration of this embodiment, the shell wall of the shell is uniform in all places, and the thickness of the shell cover 5 is uniform.

[0053] As an illustration of this embodiment, on the aluminum-plastic film lithium-ion battery 3, both electrodes 1 extend from the same width end. Correspondingly, a wider electrode protrusion hole 42 is provided at one width end of the rigid housing 4, through which both electrodes 1 extend outside the rigid housing 4 for external connection for charging and discharging applications.

[0054] See Figure 2As shown in the illustration, in this embodiment, a charge / discharge protection circuit module 6 can be further encapsulated within the aluminum-plastic film housing 31. This module is electrically connected between the electrode 1 of the battery cell and the electrode 1 extending from the rigid housing 4, and is located between the two. In its fabrication, after the battery cell is stacked, the charge / discharge protection circuit module 6 is electrically connected to the electrode 1 end of the battery cell. An electrode 1 is further led out from the charge / discharge protection circuit module 6 side to extend beyond the rigid housing 4 for external connection. This led-out electrode 1 can be a copper sheet or a wire.

[0055] During the encapsulation of the aluminum-plastic film shell 31, two recesses are formed on the aluminum-plastic film shell. One recess is used to accommodate the stacked battery cell, and the other recess is used to accommodate the charge-discharge protection circuit module 6. The aluminum-plastic film encapsulation and electrolyte injection of the stacked battery cell are performed, as is the aluminum-plastic film encapsulation of the charge-discharge protection circuit module 6. Two independent sealed spaces are formed on the aluminum-plastic film shell 31, with the electrolyte sealed within the cavity containing the stacked battery cell. During the encapsulation of the rigid shell 4, the aluminum-plastic film lithium-ion battery 3, which encapsulates the charge-discharge protection circuit module 6 and the stacked battery cell, is placed entirely into the rigid shell 4, and the shell cover 5 is then sealed. The technical solution of this embodiment further improves the charge-discharge protection of the lithium-ion battery, enhancing battery safety. Furthermore, encapsulating the charge-discharge protection circuit module within the soft-pack aluminum-plastic film shell improves the structural integrity of the curved lithium-ion battery, further facilitating installation in curved electronic products and enhancing usability.

[0056] As an illustration of this embodiment, after the two electrodes 1 pass through the electrode protrusion hole 42, waterproof adhesive is further applied inside the electrode protrusion hole 42. The waterproof adhesive solidifies and forms a bond between the two electrodes 1, sealing the electrode protrusion hole 42. On the one hand, it serves to position the electrodes 1 and prevent them from becoming loose due to the connection of the electrodes 1. On the other hand, it improves the sealing performance of the lithium-ion battery.

[0057] As an illustration of this embodiment, the rigid housing 4 is formed by stamping a metal sheet or plate with a stamping die that has the same shape as the housing. The corresponding cover 5 is a metal cover. The housing and the cover 5 can be connected by laser welding for sealing, but are not limited to this. Alternatively, a matching snap-fit ​​part can be provided between the side opening 31 and the cover 5, and the two can be connected by snap-fit ​​sealing.

[0058] As an illustration of this embodiment, the rigid housing 4 can be formed by plastic injection molding, but is not limited to this method, and the corresponding cover 5 is a plastic sheet. The two can be connected by ultrasonic welding, but is not limited to this method, or they can be connected by snap-fit ​​as described above.

[0059] The arc-shaped battery of this embodiment can be applied to arc-shaped or ring-shaped electronic products. Any arc-shaped segment on the electronic product serves as a power supply compartment. Both ends of the power supply compartment are equipped with power input terminals that are electrically connected (e.g., welded) to the positive electrode 1 and negative electrode 1 of the arc-shaped battery of this embodiment. These two power input terminals are electrically connected to the positive and negative terminals of the electronic product's drive circuit. The arc-shaped battery supplies power to the drive circuit to drive the electronic product. Because the arc-shaped battery has a rigid casing 4, it is not easily deformed during operation and application or when subjected to external forces, thus maintaining a shape consistent with the pre-set power supply compartment on the electronic product, facilitating installation. Example

[0060] See Figure 7-14 .

[0061] This embodiment provides an arc-shaped aluminum-plastic film lithium-ion battery that can be sealed within the rigid casing described in Embodiment 1. The battery is arc-shaped along its length and is particularly suitable as a power supply battery for ring-shaped or arc-shaped electronic products such as rings or bracelets.

[0062] The aluminum-plastic film arc battery includes a stacked cell body (not shown in the figure) and an aluminum-plastic film for encapsulating the stacked cell body.

[0063] A laminated battery cell consists of sheet-like positive electrode plates, separator layers, and negative electrode plates stacked together. After stacking, the middle of the laminated battery cell along its length is initially fixed to prevent it from spreading out. In its natural state, the laminated battery cell is placed in a support mold of different shapes. Under the action of gravity, the electrode plates and separator layers of the laminated battery cell adhere tightly to the top surface of the support mold, and the laminated battery cell takes on a shape consistent with the current support mold.

[0064] For example, when the top surface of the support mold is a raised arc along the length direction, the two wide ends of the stacked battery cell placed on it naturally droop under the action of gravity. The stacked battery cell on the support mold is naturally arc-shaped along the length direction, with the middle part of the arc protruding and the two ends drooping. The inner arc of the side of the stacked battery cell is close to the support mold, and the outer arc is located on the top surface of the aluminum-plastic film arc battery.

[0065] When the supporting mold is a concave arc shape along the length direction, the stacked battery cell on it is an arc shape that can only be concave in the middle and rise at both ends. The outer arc of the side of the stacked battery cell is in close contact with the supporting mold, and the inner arc is located on the top surface of the aluminum-plastic film arc battery.

[0066] The electrode 1 of the stacked cell extends from its wide end. This embodiment provides a suitable aluminum-plastic film arc battery for extremely narrow applications, for example, the aluminum-plastic film arc battery has a width of approximately 4 mm and a thickness of approximately 2 mm. The positive electrode of the stacked cell extends from one wide end of the stacked cell, and the negative electrode extends from the other wide end of the stacked cell. Adhesive films are attached to both sides of the positive and negative electrodes near the root of the stacked cell, so that during heat sealing, the adhesive films on both surfaces of the electrode 1 are thermally melted and sealed together with the adhesive on the surfaces of the aluminum-plastic film on both sides, thus achieving a seal between the electrode 1 and the aluminum-plastic film on both sides. The exposed metal end of the electrode 1 extends from both wide ends of the aluminum-plastic film arc battery.

[0067] A recess 2 matching the shape of the laminated battery cell is pre-stamped on the aluminum-plastic film. The inner surface of the bottom surface of the recess 2 is an arc-shaped surface along the length direction. The recess 2 is a support mold for the laminated battery cell. The shape of the inner surface of the bottom surface of the recess 2 determines the shape of the laminated battery cell placed in the recess 2.

[0068] In this embodiment, the two length edges of the opening of the recess 2 are arcs parallel to its bottom surface, and the two width edges of the opening of the recess 2 can be straight lines respectively.

[0069] For illustration, the thickness of the aluminum-plastic film used is approximately 0.076 mm.

[0070] As an illustration of this embodiment, the recess 2 formed in the aluminum-plastic film can be symmetrical about, but not limited to, the line connecting the midpoints of the two length edges.

[0071] As an illustration of this embodiment, after the laminated battery cell is placed into the recess 2 of the aluminum-plastic film and shaped into an arc shape in the length direction, the laminated battery cell can be further hot-pressed, but not limited to, to fix the arc shape of the laminated battery cell.

[0072] An integral aluminum-plastic film extends from all four sides of the opening in the recess 2 of the aluminum-plastic film. The extension width of the aluminum-plastic film extending beyond the two width edges and the first arc-shaped length edge of the opening in the recess 2 is approximately the width of the heat-sealing area, for heat sealing. The extension width of the aluminum-plastic film extending beyond the second arc-shaped length edge of the opening in the recess 2 is the sum of the width of the recess 2 and the heat-sealing width of the heat-sealing area. After the stacked battery cell is inserted, the aluminum-plastic film is folded along the second arc-shaped length edge of the opening in the recess 2, so that the folded aluminum-plastic film completely covers the opening in the recess 2 and is in face-to-face contact with the aluminum-plastic film extending beyond the two width edges and the first arc-shaped length edge of the opening in the recess 2.

[0073] Electrolyte filling and aluminum-plastic film encapsulation are performed. Specifically, aluminum-plastic film encapsulation involves using an aluminum-plastic film heat-sealing device to heat-seal two opposing aluminum-plastic film layers located at the two width ends of the opening in recess 2 and outside the second arc-shaped length edge. The surface of the heat-pressing head acting on the surface of the aluminum-plastic film is parallel to the bottom surface of the aluminum-plastic film, forming arc-shaped heat-sealing areas of a certain width at the two width ends of the opening in recess 2 and outside the second arc-shaped length edge. In each heat-sealing area, the surface materials of the two adjacent aluminum-plastic film layers are heat-fused and sealed together. The adhesive tape on the electrode 1 of the laminated battery cell is heat-fused and sealed together with the surface materials of the two adjacent aluminum-plastic film layers, thus sealing the electrode segment in the heat-sealed area with the two aluminum-plastic film layers. The laminated battery cell is sealed inside the aluminum-plastic film shell, and the exposed metal end of the electrode 1 extends from the heat-sealed area for external connection.

[0074] As an illustration of this embodiment, the heat sealing width of each heat sealing zone may be, but is not limited to, approximately 1.0 mm.

[0075] As an illustration of this embodiment, electrolyte injection can be performed first, or it can be performed after heat sealing of any one or two sides of the aluminum-plastic film, in order to avoid electrolyte contamination of the surface of the aluminum-plastic film and affecting the heat sealing effect.

[0076] Electrolyte filling and aluminum-plastic film heat sealing processes can be, but are not limited to, those described in existing technologies.

[0077] As can be seen from the above, the aluminum-plastic film arc-shaped battery of this embodiment is particularly suitable for arc-shaped or ring-shaped electronic products (such as ring-shaped or bracelet-shaped electronic products for wear by users). Compared with the prior art, which has aluminum-plastic film heat-sealing areas on both length edges, the aluminum-plastic film arc-shaped battery of this embodiment is heat-sealed only on one arc-shaped length side, while the other arc-shaped length side is a completely sealed integral structure without heat sealing. The airtightness of the structure of this embodiment is better guaranteed, and the space occupied by the heat-sealing area in the aluminum-plastic film arc-shaped battery is reduced, which is conducive to fully improving the utilization space of the stacked cell.

[0078] In addition, in this embodiment, the two length edges of the recess 2 opening of the aluminum-plastic film arc battery are both arc-shaped length edges, and the heat-sealing area on the arc-shaped length side is an arc-shaped heat-sealing area. The two arc-shaped curved surfaces of the battery are parallel, which can better adapt to the power supply position of ring or semi-ring electronic products and make full use of the power supply position space.

[0079] To further illustrate the solution of this embodiment, the shape of the recess 2 on the aluminum-plastic film will be used as an example for explanation below.

[0080] A stamping die is used to stamp the surface of the aluminum-plastic film to form a recess 2.

[0081] For example, see Figures 7-10As shown, the inner surface of the closed bottom of recess 2 is arc-shaped along its length, with the middle part of the arc protruding towards the opening of recess 2. Correspondingly, the outer surface of the bottom of recess 2 (i.e., the outer surface of the aluminum-plastic film arc battery at this location) is concave, and the two long edges of the opening of recess 2 are arc-shaped parallel to the bottom surface of recess 2, meaning the middle parts of the two long edges of the arc protrude upwards respectively. After inserting the stacked battery cells, the aluminum-plastic film is folded, electrolyte is injected, and the aluminum-plastic film is heat-sealed to obtain the aluminum-plastic film arc battery. On the aluminum-plastic film arc battery, the aluminum-plastic film covering the opening of recess 2 is convex, parallel to the bottom surface of recess 2. Viewed from the side, the bottom surface of the recess 2 of the aluminum-plastic film is the inner arc of the aluminum-plastic film arc battery, and the aluminum-plastic film covering the opening of the recess 2 is the outer arc of the aluminum-plastic film arc battery. The electrode 1 is located at the two width ends of the outer arc. The outer arc and the inner arc are parallel, and the distance between the inner arc and the outer arc is the thickness of the battery.

[0082] For example, see Figures 11-14 As shown, the inner surface of the closed bottom of the recess 2 formed on the aluminum-plastic film is arc-shaped along its length, with the middle part of the arc concave towards the bottom. Correspondingly, the outer surface of the bottom of the recess 2 (i.e., the outer surface of the aluminum-plastic film arc battery at this location) is convex, and the two long edges of the opening of the recess 2 are arc-shaped parallel to the bottom surface of the recess 2, that is, the middle parts of the two arc-shaped long edges are concave towards the bottom. After inserting the stacked battery cells, the aluminum-plastic film is folded, electrolyte is injected, and the aluminum-plastic film is heat-sealed to obtain the aluminum-plastic film arc battery. On the aluminum-plastic film arc battery, the aluminum-plastic film covering the opening of the recess 2 is concave and parallel to the bottom surface of the recess 2. Viewed from the side, the bottom surface of the recess 2 of the aluminum-plastic film is the outer arc of the aluminum-plastic film arc battery, and the aluminum-plastic film covering the opening of the recess 2 is the inner arc of the aluminum-plastic film arc battery. The electrode 1 is located at the two opposite ends of the inner arc. The outer arc and the inner arc are parallel, and the distance between the inner arc and the outer arc is the thickness of the battery.

[0083] As an illustration of this embodiment, the heat-sealing areas at the two wide ends of the aluminum-plastic film arc battery can be non-folded to avoid bending of the electrode 1. The heat-sealing areas at the two wide ends extend in an arc shape at the two ends of the aluminum-plastic film covering the opening of the recess 2. As the outer edges of the two wide ends of the aluminum-plastic film encapsulating the opening of the recess 2, the two electrodes 1 extend out of the two wide ends of the aluminum-plastic film arc battery.

[0084] As an illustration of this embodiment, the heat-sealing width of the heat-sealing area extending beyond the second arc-shaped length edge of the opening in the recess 2 can be widened, making it greater than the heat-sealing width of the heat-sealing areas at both width ends, thereby improving the reliability of the heat-sealing of the aluminum-plastic film arc-shaped battery. Preferably, but not limited to, the heat-sealing width of the heat-sealing area located outside the second arc-shaped length edge of the opening in the recess 2 is greater than the heat-sealing width of the heat-sealing areas at both width ends, and is equal to or slightly less than the thickness of the aluminum-plastic film arc-shaped battery. For example, if the thickness of the aluminum-plastic film arc-shaped battery (i.e., the height of the side of the recess 2) is 2mm, and the heat-sealing width of the arc-shaped heat-sealing area at both width ends is 1.0mm, then the heat-sealing width of the heat-sealing area located outside the second arc-shaped length edge of the opening in the recess 2 is greater than 1.0mm and less than or equal to 3mm, such as 1.5mm or 2mm. After heat sealing, the heat-sealed area is folded outwards along the second arc-shaped length edge of the opening of the recess 2, so that the widened heat-sealed area is tightly attached to the outside of the side of the recess 2, and does not exceed the arc-shaped intersection edge between the side and bottom of the recess 2, resulting in a compact structure for the aluminum-plastic film arc battery. As an illustration of this embodiment, adhesive is also coated on the outer surface of the side of the recess. The adhesive firmly bonds the heat-sealed area folded to the outer surface of the side of the recess to the side of the aluminum-plastic film arc battery, preventing it from loosening and affecting the appearance consistency of the aluminum-plastic film arc battery, improving the structural compactness of the aluminum-plastic film casing, reducing the space occupied by the aluminum-plastic film casing, and increasing the effective space of the stacked cell body. Specifically, but not limited to, the adhesive can be cured by hot-pressing the side of the aluminum-plastic film arc battery to tightly bond the heat-sealed area to the side of the aluminum-plastic film arc battery.

[0085] As an illustration of this embodiment, the width of the heat-sealing area outside the second arc-shaped length edge of the opening in recess 2 can be further widened to further enhance the airtight reliability of the aluminum-plastic film arc battery. It is possible, but not limited to, making the heat-sealing width of the heat-sealing area outside the second arc-shaped length edge of the opening in recess 2 greater than the thickness of the aluminum-plastic film arc battery and less than or equal to the sum of the width and thickness of the aluminum-plastic film arc battery. For example, assuming the width of the aluminum-plastic film arc battery is 4mm and the thickness is 1.5mm, and the heat-sealing width of the heat-sealing area at both ends of the width is 1mm, then the heat-sealing width of the heat-sealing area outside the second arc-shaped length of the opening in recess 2 is greater than 1.5mm and equal to or less than 5.5mm, for example, 2mm or 5.5mm. After heat sealing, the heat-sealed area is folded once along the second arc-shaped length edge of the opening of the recess 2 towards the outer side of the recess 2, so that the heat-sealed area is tightly attached to the outer surface of the side of the recess 2. Then, the heat-sealed area is further folded beyond the arc-shaped intersection edge between the side of the recess 2 and the bottom surface of the recess 2, so that it is tightly attached to the bottom surface of the recess 2 and does not exceed the first arc-shaped length edge of the bottom surface of the recess 2. The aluminum-plastic film arc battery has a compact structure.

[0086] As an illustration of this embodiment, adhesive is also applied to the outer surface of the bottom of the recess. The adhesive firmly bonds the heat-sealed area folded onto the outer surface of the bottom of the recess to the side of the aluminum-plastic film curved battery, preventing it from loosening and affecting the appearance consistency of the aluminum-plastic film curved battery. This also helps improve the compactness of the aluminum-plastic film casing, reduces the space occupied by the aluminum-plastic film casing, and increases the effective space of the stacked battery cells. Specifically, but not limited to, using a hot-pressing method on the bottom surface of the recess of the aluminum-plastic film curved battery can cure the adhesive and tightly bond the heat-sealed area to the bottom surface of the recess of the aluminum-plastic film curved battery.

[0087] 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. An arc-shaped battery, characterized in that, include, The aluminum-plastic film lithium-ion battery is arc-shaped along its length, with two electrodes extending from the wide end of the battery. The thickness of the aluminum-plastic film lithium-ion battery is the distance between the inner and outer arcs. A rigid housing has an inner cavity that is arc-shaped along its length, and an electrode protrusion hole is provided at the wide end of the rigid housing. One side of the rigid shell along its length is a lateral opening. The two length edges of the lateral opening are two arc-shaped length edges located on the same plane of the rigid shell, one of which is an inner arc edge and the other is an outer arc edge. The two width edges are the two height edges of the rigid shell. The aluminum-plastic film lithium-ion battery enters the inner cavity through the side opening and is housed within the inner cavity. The ends of the two electrodes extend from the electrode extension holes at the wide ends of the rigid casing. A rigid cover is sealed at the lateral opening. The cover is a flat plate, one of which is an inner arc edge and the other is an outer arc edge. The inner arc edge and the outer arc edge of the flat plate are respectively connected to the inner arc edge and the outer arc edge of the lateral opening. The two width edges of the flat plate are respectively connected to the two width edges of the lateral opening.

2. The arc-shaped battery according to claim 1, characterized in that, A charge / discharge protection circuit module is also electrically connected between the electrodes of the cell body of the aluminum-plastic film lithium-ion battery and the two electrodes extending from the wide end. The charge / discharge protection circuit module is encapsulated within the aluminum-plastic film casing of the aluminum-plastic film lithium-ion battery.

3. The arc-shaped battery according to claim 2, characterized in that, Two independent chambers are formed inside the aluminum-plastic film shell. The stacked battery cell and electrolyte are sealed in one chamber, and the charge-discharge protection circuit module is sealed in the other chamber.

4. The arc-shaped battery according to claim 1, characterized in that, The electrode protrusion hole is also filled with waterproof colloid, and the two electrodes are spaced apart by the waterproof colloid, which seals the electrode protrusion hole.

5. The arc-shaped battery according to claim 1, characterized in that, The rigid housing and the housing cover are made of plastic; or... The rigid housing and the cover are metal parts.

6. The arc-shaped battery according to claim 1, characterized in that, The aluminum-plastic film lithium-ion battery includes, Laminated battery cell body and aluminum-plastic film, wherein the laminated battery cell body A recess matching the shape of the arc-shaped battery is formed on the aluminum-plastic film. The bottom surface of the recess is arc-shaped along its length, and the two arc-shaped long edges of the open end of the recess are parallel to the bottom surface of the recess. The stacked battery cell is confined within the recess. The aluminum-plastic film extending beyond the first arc-shaped length edge of the opening in the recess is folded along the first arc-shaped length edge, completely covering the opening of the recess, and adhering to the aluminum-plastic film extending beyond the second arc-shaped length edge and both width edges of the opening in the recess, forming heat-sealing areas at the two width edges and the second arc-shaped length edge of the opening in the recess, respectively. In each of the heat-sealing areas, the surfaces of the two aluminum-plastic films that are in contact are heat-sealed together. The ends of the electrodes of the stacked battery cell extend from the heat-sealing area at the wide end. The electrodes are sealed together with the heat-sealing area. The stacked battery cell is sealed inside the aluminum-plastic film housing. The two electrodes of the laminated battery cell extend from the width portion of the aluminum-plastic film housing.

7. An electronic product characterized by, include, The arc-shaped battery according to any one of claims 1 to 6, The driving circuit is electrically connected to the two electrodes of the arc-shaped battery.

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