Curved battery shaping structure and curved soft pack battery

Abstract

The present application provides an arc-shaped battery shaping structure and an arc-shaped soft-pack battery. The above-mentioned arc-shaped battery shaping structure includes an arc-shaped battery cell and a battery cell shaping member. The arc-shaped battery cell includes a battery cell body and a first connecting portion, and the first connecting portion is arranged on the convex arc surface of the battery cell body. The battery cell shaping member includes an arc-shaped fixing plate and a second connecting portion, and the second connecting portion is arranged on the concave arc surface of the arc-shaped fixing plate, and the first connecting portion is connected to the second connecting portion. Since the concave arc surface of the arc-shaped fixing plate abuts against the convex arc surface of the battery cell body, and the arc-shaped fixing plate has good mechanical strength, it can support and solidify the battery cell body, that is, prevent the battery cell body from resetting and deforming, thereby allowing the arc-shaped battery to better maintain its own curvature during transportation and circulation.

Description

Technical Field

[0001] The present invention relates to the field of arc-shaped batteries, and in particular to an arc-shaped battery shaping structure and an arc-shaped soft-pack battery. Background Art

[0002] In order to make the arrangement of various types of electronic components inside the electronic device more compact and to more effectively utilize the space inside the electronic device, the industry has begun to use various special-shaped secondary batteries including curved batteries.

[0003] Traditional curved soft-pack batteries are directly stamped from flat soft-pack batteries after formation. The flat soft-pack batteries are deformed into a curved structure through a long stamping time. However, after the traditional curved soft-pack batteries are bent, their aluminum-plastic film packaging sleeves will produce more wrinkles, resulting in poor surface flatness of the curved soft-pack batteries. In addition, although the traditional curved soft-pack batteries have undergone a long bending time during stamping, the internal cells of the curved soft-pack batteries still inevitably have rebound stress, which causes the curved soft-pack batteries to spontaneously deform from a curved structure to a flat structure, resulting in a large change in the curvature of the curved soft-pack batteries during circulation and storage. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a curved battery shaping structure and a curved soft-pack battery in which the curvature of the battery cell is not easy to rebound, the structural stability is good, and the surface flatness of the packaging sleeve is high.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A curved battery shaping structure, comprising:

[0007] An arc-shaped battery cell, the arc-shaped battery cell comprising a battery cell body and a first connecting portion, wherein the first connecting portion is arranged on a convex arc surface of the battery cell body;

[0008] A cell shaping piece, the cell shaping piece comprises an arc-shaped fixing piece and a second connecting portion, the second connecting portion is arranged on a concave arc surface of the arc-shaped fixing piece, and the first connecting portion is connected to the second connecting portion.

[0009] In one embodiment, the arc-shaped battery shaping structure further includes an arc-shaped adhesive layer, a concave arc surface of the arc-shaped adhesive layer is bonded to the first connecting portion, and a convex arc surface of the arc-shaped adhesive layer is bonded to the second connecting portion.

[0010] In one embodiment, the arc-shaped fixing plate includes an arc-shaped steel plate and a first arc-shaped reinforcement plate, the arc-shaped steel plate includes a central portion and two edge portions, the two edge portions are respectively integrally connected to the two ends of the central portion, and the convex arc surface of the first arc-shaped reinforcement plate is welded to the concave arc surface of the central portion.

[0011] In one embodiment, the arc-shaped fixing plate further includes a second arc-shaped reinforcement plate, and a concave arc surface of the second arc-shaped reinforcement plate is welded to the convex arc surface of the central portion.

[0012] In one embodiment, the arc-shaped fixing plate further includes a metal covering member, and the metal covering member is respectively covered on the arc-shaped steel plate, the first arc-shaped reinforcement plate and the second arc-shaped reinforcement plate.

[0013] In one of the embodiments, the battery core shaping member further includes an anti-corrosion coating member, the anti-corrosion coating member is coated on the metal coating member, and the second connecting portion is disposed on the anti-corrosion coating member.

[0014] In one embodiment, the second connecting portion is provided with a corona layer.

[0015] In one embodiment, the battery cell body is a laminated battery cell or a wound battery cell.

[0016] In one embodiment, the concave arc surface of the arc-shaped fixing plate is matched with the convex arc surface of the battery cell body.

[0017] A curved soft-pack battery comprises the curved battery shaping structure described in any of the above embodiments, the curved soft-pack battery also comprises an aluminum-plastic film packaging sleeve, the aluminum-plastic film packaging sleeve is provided with arc-shaped receiving grooves and connecting holes that are interconnected, the curved battery cell also comprises a battery cell tab, the battery cell tab is connected to the battery cell body, the battery cell body and the battery cell shaping member are both arranged in the arc-shaped receiving groove, and the battery cell tab is penetrated through the connecting hole.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] 1. Since the concave surface of the arc-shaped fixing sheet abuts against the convex surface of the battery cell body, and the arc-shaped fixing sheet has good mechanical strength, it can support and solidify the battery cell body, that is, prevent the battery cell body from being reset and deformed, so that the arc-shaped battery can better maintain its own curvature during transportation and circulation.

[0020] 2. Since the battery cell body is supported and solidified by the arc-shaped fixing sheet, when stamping the battery cell body, it is only necessary to bend the battery cell body into an arc-shaped structure without considering the rebound problem of the battery cell body. Therefore, the stamping time of the battery cell body can be effectively shortened, thereby achieving the effect of improving processing efficiency.

[0021] 3. Since the battery body is supported and solidified by the arc-shaped fixing sheet, when processing the arc-shaped soft-pack battery, the arc-shaped battery and the battery fixing parts can be directly installed in the aluminum-plastic film packaging sleeve with the arc-shaped placement groove, without the need to bend the flat soft-pack battery after formation, thereby effectively avoiding the wrinkles caused by the bending operation, so that the aluminum-plastic film packaging sleeve has a better surface flatness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a cross-sectional schematic diagram of a curved battery shaping structure in one embodiment;

[0024] Figure 2 for Figure 1 A partial enlarged schematic diagram of the arc-shaped battery shaping structure shown;

[0025] Figure 3 Schematic cross-sectional view of a curved soft-pack battery in one embodiment.

[0026] Figure 4 for Figure 3 Flow chart of the processing method of the curved soft-pack battery shown. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] like Figure 1 and Figure 2 As shown, an arc-shaped battery shaping structure 10 of an embodiment includes an arc-shaped battery cell 100 and a battery cell shaping member 200. The arc-shaped battery cell 100 includes a battery cell body 110 and a first connecting portion 111, and the first connecting portion 111 is arranged on the convex arc surface of the battery cell body 110. The battery cell shaping member 200 includes an arc-shaped fixing plate 210 and a second connecting portion 211, and the second connecting portion 211 is arranged on the concave arc surface of the arc-shaped fixing plate 210, and the first connecting portion 111 is connected to the second connecting portion 211.

[0031] In this embodiment, the arc-shaped battery shaping structure 10 includes an arc-shaped battery cell 100 and a battery cell shaping piece 200. The arc-shaped battery cell 100 includes a battery cell body 110. The battery cell body 110 is an arc-shaped structure. Specifically, after a traditional battery cell is punched by a punching machine, the flat battery cell can be quickly bent into an arc-shaped structure. The convex arc surface of the arc-shaped battery cell body 110 is provided with a first connecting portion 111, and the first connecting portion 111 is used for connecting to the battery cell shaping piece 200. The battery cell shaping member 200 includes an arc-shaped fixing sheet 210, which is a thin sheet with an arc-shaped structure. The arc-shaped fixing sheet 210 has high mechanical strength and can provide a good supporting and solidifying effect. The arc-shaped fixing sheet 210 itself is relatively light and thin, which helps to reduce the bulkiness of the arc-shaped battery. The concave arc surface of the arc-shaped fixing sheet 210 is provided with a second connecting portion 211, and the second connecting portion 211 is connected to the first connecting portion 111, so that the concave arc surface of the arc-shaped fixing sheet 210 abuts against the convex arc surface of the battery cell body 110.

[0032] After the traditional flat battery cell is quickly bent, although it has an arc structure, there is still a large rebound stress inside. The two ends of the battery cell body 110 will be reset and deformed toward its convex arc surface. After the first connecting part 111 is connected to the second connecting part 211, the concave arc surface of the arc-shaped fixing sheet 210 abuts against the convex arc surface of the battery cell body 110, and the arc-shaped fixing sheet 210 has good mechanical strength, which can support and solidify the battery cell body 110, that is, prevent the reset deformation of the battery cell body 110, so that the arc-shaped battery can better maintain its own curvature during transportation and circulation. At the same time, since the battery cell body 110 is supported and solidified by the arc-shaped fixing sheet 210, when the battery cell body 110 is stamped, it is only necessary to achieve the effect of bending the battery cell body 110 to the arc structure, without considering the rebound problem of the battery cell body 110, so the stamping time of the battery cell body 110 can be effectively shortened, thereby achieving the effect of improving processing efficiency. In addition, since the battery cell body 110 is supported and solidified by the arc-shaped fixing sheet 210, that is, the arc-shaped soft-pack battery does not need to be solidly supported by the aluminum-plastic film packaging sleeve for the battery cell body 110, when processing the arc-shaped soft-pack battery, the arc-shaped battery cell 100 and the battery cell fixing parts can be directly installed in the aluminum-plastic film packaging sleeve with an arc-shaped placement groove, without the need to bend the flat soft-pack battery after formation, thereby effectively avoiding wrinkles caused by the bending operation, so that the aluminum-plastic film packaging sleeve has better surface flatness.

[0033] like Figure 1 and Figure 2 As shown, in one embodiment, the arc-shaped battery shaping structure 10 further includes an arc-shaped adhesive layer 300, the concave arc surface of the arc-shaped adhesive layer 300 is bonded to the first connection part 111, and the convex arc surface of the arc-shaped adhesive layer 300 is bonded to the second connection part 211. In this embodiment, the connection method of the battery body 110 and the arc-shaped fixing sheet 210 is bonding by adhesive glue, by applying adhesive glue on the first connection part 111 of the battery body 110, and laminating the second connection part 211 of the arc-shaped fixing sheet 210 with the adhesive glue, and after the adhesive glue is cured, the arc-shaped adhesive layer 300 is formed, and the battery body 110 and the arc-shaped fixing sheet 210 are bonded and fixed to each other. Connecting the cell body 110 and the arc-shaped fixing plate 210 by bonding can greatly reduce the space occupied by the cell body 110 and the arc-shaped fixing plate 210 in the aluminum-plastic film packaging sleeve, thereby helping to improve the lightness and thinness of the arc-shaped soft-pack battery.

[0034] like Figure 1 and Figure 2As shown, in one embodiment, the arc-shaped fixing plate 210 includes an arc-shaped steel sheet 212 and a first arc-shaped reinforcement sheet 213, the arc-shaped steel sheet 212 includes a central portion and two edge portions, the two edge portions are respectively integrally connected to the two ends of the central portion, and the convex arc surface of the first arc-shaped reinforcement sheet 213 is welded to the concave arc surface of the central portion. The battery cell body 110 is formed into an arc structure after stamping, and there is rebound stress inside the battery cell body 110. Since the deformation degree of the central part of the battery cell body 110 is greater than that of the two ends, the rebound stress of the central part is relatively large. In this embodiment, the arc-shaped fixing plate 210 includes an arc-shaped steel sheet 212, and the central part of the arc-shaped steel sheet 212 is welded to the first arc-shaped reinforcing sheet 213, so that the thickness of the center of the arc-shaped fixing plate 210 is greater than the thickness of the two ends of the arc-shaped fixing plate 210. In this way, the center of the arc-shaped fixing plate 210 has a stronger supporting strength, which can support and fix the central part of the battery cell body 110 with a larger rebound stress, thereby achieving the effect of preventing the battery cell body 110 and the arc-shaped fixing plate 210 from deforming.

[0035] like Figure 1 and Figure 2 As shown, in one embodiment, the arc-shaped fixing sheet 210 further includes a second arc-shaped reinforcing sheet 214, and the concave arc surface of the second arc-shaped reinforcing sheet 214 is welded to the convex arc surface of the center portion. In this embodiment, the arc-shaped fixing sheet 210 further includes a second arc-shaped reinforcing sheet 214, and the first arc-shaped reinforcing sheet 213 and the second arc-shaped reinforcing sheet 214 are respectively welded to the concave arc surface and the convex arc surface of the center portion, which can further enhance the supporting strength of the arc-shaped fixing sheet 210, thereby preventing the battery body 110 from being reset and deformed, and preventing the arc-shaped fixing sheet 210 from supporting failure.

[0036] like Figure 1 and Figure 2As shown, in one embodiment, the arc-shaped fixing plate 210 further includes a metal covering member 215 , and the metal covering member 215 is respectively covered on the arc-shaped steel plate 212 , the first arc-shaped reinforcement plate 213 and the second arc-shaped reinforcement plate 214 . In this embodiment, after the first arc-shaped reinforcement sheet 213 and the second arc-shaped reinforcement sheet 214 are welded to the arc-shaped steel sheet 212, electroplating is performed on the assembly of the three. Specifically, electroplating is performed on the assembly of the first arc-shaped reinforcement sheet 213, the second arc-shaped reinforcement sheet 214 and the arc-shaped steel sheet 212, so that a metal aluminum coating is attached to the surface of the assembly. The metal aluminum coating is the metal cladding 215 coated on the arc-shaped steel sheet 212, the first arc-shaped reinforcement sheet 213 and the second arc-shaped reinforcement sheet 214. The metal cladding 215 can increase the structural integrity of the arc-shaped fixing sheet 210, so that the appearance of the arc-shaped fixing sheet 210 is smoother. At the same time, the metal aluminum coating will quickly oxidize in the air to form a dense oxide film, which can prevent the internal structure of the metal cladding 215 from oxidation and corrosion, thereby achieving the effect of extending the service life of the arc-shaped fixing sheet 210.

[0037] like Figure 1 and Figure 2 As shown, in one embodiment, the battery core shaping member 200 further includes an anti-corrosion coating member 220 , the anti-corrosion coating member 220 is coated on the metal coating member 215 , and the second connecting portion 211 is disposed on the anti-corrosion coating member 220 . Since the cell shaping member 200 is arranged together with the cell body 110 in the aluminum-plastic film packaging sleeve, the cell shaping member 200 is in contact with the electrolyte at all times, so the cell shaping member 200 is required to have good chemical stability to prevent the corrosion of the electrolyte. In the present embodiment, the metal cladding 215 is coated with an anti-corrosion coating 220, and the anti-corrosion coating 220 is used to coat the metal cladding 215 so that the arc-shaped fixing sheet 210 has good chemical stability. Specifically, by coating the metal cladding 215 with Teflon coating, the Teflon material has good corrosion resistance. When the Teflon coating is cured, the anti-corrosion coating 220 is formed. The anti-corrosion coating 220 can effectively block the electrolyte from the arc-shaped fixing sheet 210 to prevent the electrolyte from contacting the arc-shaped fixing sheet 210, thereby making the cell shaping member 200 have good chemical stability and can support the cell body 110 for a long time and stably in the aluminum-plastic film packaging sleeve.

[0038] like Figure 1 and Figure 2As shown, in one embodiment, the second connection part 211 is provided with a corona layer. In this embodiment, the second connection part 211 is provided with a corona layer, and the second connection part 211 is used to bond with the first connection part 111 of the battery cell body 110. After the second connection part 211 is subjected to a corona operation, a corona layer can be formed on the second connection part 211. The surface of the corona layer has a large number of microporous structures, and the large number of microporous structures can effectively increase the surface area of ​​the second connection part 211. The increase in the surface area can increase the bonding strength between the second connection part 211 and the bonding glue, so that the bonding between the battery cell body 110 and the arc-shaped fixing sheet 210 is more firmly, and the arc-shaped fixing sheet 210 can better support the battery cell body 110 in a solid state.

[0039] like Figure 1 and Figure 2 As shown, in one embodiment, the battery body 110 is a laminated battery or a wound battery. In this embodiment, the battery body 110 can be a laminated battery after a bending operation, or a wound battery after a bending operation, which helps to increase the variety and wide application of arc-shaped soft-pack batteries.

[0040] like Figure 1 and Figure 2 As shown, in one embodiment, the concave arc surface of the arc-shaped fixing sheet 210 is matched with the convex arc surface of the battery cell body 110. In this embodiment, the shape of the concave arc surface of the arc-shaped fixing sheet 210 is matched with the convex arc surface of the battery cell body 110, so that after the arc-shaped fixing sheet 210 and the battery cell body 110 are connected, the contact connection area between the two is large, so that the rebound stress of the battery cell body 110 can act evenly on the overall structure of the arc-shaped fixing sheet 210, which helps to improve the supporting capacity of the arc-shaped fixing sheet 210, and then improve the structural stability of the battery cell body 110.

[0041] like Figure 3 As shown, the present application also provides an arc-shaped soft-pack battery, including the arc-shaped battery shaping structure 10 described in any of the above embodiments, the arc-shaped soft-pack battery also includes an aluminum-plastic film packaging sleeve 400, the aluminum-plastic film packaging sleeve 400 is provided with arc-shaped receiving grooves and connecting holes that are interconnected, the arc-shaped battery cell 100 also includes a battery cell pole ear 120, the battery cell pole ear 120 is connected to the battery cell body 110, the battery cell body 110 and the battery cell shaping member 200 are both arranged in the arc-shaped receiving groove, and the battery cell pole ear 120 is penetrated through the connecting hole.

[0042] like Figure 1 and Figure 2As shown, in one embodiment, the arc-shaped battery shaping structure 10 includes an arc-shaped battery cell 100 and a battery cell shaping piece 200. The arc-shaped battery cell 100 includes a battery cell body 110. The battery cell body 110 is an arc-shaped structure. Specifically, after a conventional battery cell is punched by a punching machine, the flat battery cell can be quickly bent into an arc-shaped structure. The convex arc surface of the arc-shaped battery cell body 110 is provided with a first connecting portion 111, and the first connecting portion 111 is used for connecting to the battery cell shaping piece 200. The battery cell shaping member 200 includes an arc-shaped fixing sheet 210, which is a thin sheet with an arc-shaped structure. The arc-shaped fixing sheet 210 has high mechanical strength and can provide a good supporting and solidifying effect. The arc-shaped fixing sheet 210 itself is relatively light and thin, which helps to reduce the bulkiness of the arc-shaped battery. The concave arc surface of the arc-shaped fixing sheet 210 is provided with a second connecting portion 211, and the second connecting portion 211 is connected to the first connecting portion 111, so that the concave arc surface of the arc-shaped fixing sheet 210 abuts against the convex arc surface of the battery cell body 110.

[0043] After the traditional flat battery cell is quickly bent, although it has an arc structure, there is still a large rebound stress inside. The two ends of the battery cell body 110 will be reset and deformed toward its convex arc surface. After the first connecting part 111 is connected to the second connecting part 211, the concave arc surface of the arc-shaped fixing sheet 210 abuts against the convex arc surface of the battery cell body 110, and the arc-shaped fixing sheet 210 has good mechanical strength, which can support and solidify the battery cell body 110, that is, prevent the reset deformation of the battery cell body 110, so that the arc-shaped battery can better maintain its own curvature during transportation and circulation. At the same time, since the battery cell body 110 is supported and solidified by the arc-shaped fixing sheet 210, when the battery cell body 110 is stamped, it is only necessary to achieve the effect of bending the battery cell body 110 to the arc structure, without considering the rebound problem of the battery cell body 110, so the stamping time of the battery cell body 110 can be effectively shortened, thereby achieving the effect of improving processing efficiency. In addition, since the battery cell body 110 is supported and solidified by the arc-shaped fixing sheet 210, that is, the arc-shaped soft-pack battery does not need to be solidly supported by the aluminum-plastic film packaging sleeve 400, when processing the arc-shaped soft-pack battery, the arc-shaped battery cell 100 and the battery cell fixing parts can be directly installed in the aluminum-plastic film packaging sleeve 400 with an arc-shaped receiving groove, without the need to bend the flat soft-pack battery after formation, thereby effectively avoiding wrinkles caused by the bending operation, so that the aluminum-plastic film packaging sleeve 400 has better surface flatness.

[0044] like Figure 4As shown, in one embodiment, the arc-shaped soft-pack battery is obtained by processing the arc-shaped soft-pack battery, and the processing method of the arc-shaped soft-pack battery includes the following steps: pre-pressing the battery cell to form the battery cell into an arc-shaped battery cell. Providing a battery cell shaping piece. Connecting the battery cell shaping piece to the arc-shaped battery cell. Punching the aluminum-plastic film sheet so that an arc-shaped placement groove adapted to the arc-shaped battery cell is provided on the aluminum-plastic film sheet. The battery cell shaping piece and the arc-shaped battery cell connected to each other are placed in the arc-shaped placement groove. Bend the aluminum-plastic film sheet so that the aluminum-plastic film sheet forms an arc-shaped packaging sleeve covering the battery cell shaping piece and the arc-shaped battery cell. Partially seal the arc-shaped packaging sleeve so that the arc-shaped packaging sleeve is provided with a liquid injection port.

[0045] In order to better understand the processing method of the arc-shaped soft-pack battery of the present invention, the processing method of the arc-shaped soft-pack battery of the present invention is further explained below. The processing method of the arc-shaped soft-pack battery comprises the following steps:

[0046] S100: Pre-press the battery cell to form an arc-shaped battery cell. In this embodiment, the battery cell is a laminated battery cell or a wound battery cell. When the battery cell is a laminated battery cell, the battery cell can be directly pre-pressed because the laminated battery cell is a flat structure; when the battery cell is a wound battery cell, the wound battery cell needs to be flattened to make the wound battery cell have a flat structure. Placing the flat battery cell in a stamping die and stamping the battery cell can quickly press the flat battery cell into an arc-shaped structure to obtain an arc-shaped battery cell.

[0047] S200: Provide a cell shaping piece. After the pre-stressing operation, the cell can be quickly deformed from a flat structure to an arc-shaped structure. However, due to the short pre-stressing time, the arc-shaped cell still has a large rebound stress inside. This rebound stress will cause the arc-shaped cell to have a large recovery tendency, that is, the arc-shaped cell will spontaneously deform from an arc-shaped structure to a flat structure. Therefore, it is necessary to fix the arc-shaped cell by a cell shaping piece so that the arc-shaped cell maintains the arc-shaped structure after the pre-stressing operation. This step is to provide a cell shaping piece, which is used to connect to the arc-shaped cell. The cell shaping piece has good strength and can support the arc-shaped battery so that the arc-shaped battery maintains its arc-shaped structure. At the same time, the cell shaping piece is small in size, making the arc-shaped battery thinner.

[0048] S300: Connect the battery cell shaping piece with the arc-shaped battery cell. In this step, the battery cell shaping piece is connected with the arc-shaped battery cell so that the arc-shaped battery cell is fixedly connected to the battery cell shaping piece. There are many ways to connect the arc to the battery cell shaping piece, which can be bonding or connection through a connector. After the battery cell shaping piece is connected with the arc-shaped battery cell, the battery cell shaping piece will support the arc-shaped battery cell, and the rebound stress of the arc-shaped battery cell will act on the battery cell shaping piece. Since the battery cell shaping piece has a high mechanical strength, the battery cell shaping piece can maintain its own structural stability when it is subjected to the rebound stress of the arc-shaped battery, thereby preventing the deformation of the arc-shaped battery cell and allowing the arc-shaped battery cell to maintain its own arc structure.

[0049] S400: stamping the aluminum-plastic film sheet so that an arc-shaped receiving groove that matches the arc-shaped battery cell is formed on the aluminum-plastic film sheet. The aluminum-plastic film sheet has good insulation, stampability, puncture resistance and electrolyte stability, and is a commonly used packaging material for soft-pack batteries. In this step, the aluminum-plastic film sheet is stamped, and the stamping mold is adapted to the shape of the arc-shaped battery cell. After stamping, the aluminum-plastic film will form an arc-shaped receiving groove that matches the arc-shaped battery, and the arc-shaped receiving groove is used to accommodate the arc-shaped battery.

[0050] S500: placing the interconnected battery cell shaping parts and the arc-shaped battery cell in the arc-shaped receiving groove. In the previous step, the aluminum-plastic film body is punched out with an arc-shaped receiving groove that matches the arc-shaped battery cell. In this step, the interconnected battery cell shaping parts and the arc-shaped battery cell are placed in the arc-shaped receiving groove. The arc-shaped receiving groove can limit the battery cell shaping parts and the arc-shaped battery cell placed therein, so that the battery cell shaping parts and the arc-shaped battery cell are relatively stably arranged in the arc-shaped receiving groove for the convenience of subsequent operations.

[0051] S600: The aluminum-plastic film sheet is bent to form an arc-shaped packaging sleeve covering the battery cell shaping piece and the arc-shaped battery cell. Since the aluminum-plastic film sheet is provided with an arc-shaped placement groove, and the arc-shaped battery cell and the battery cell shaping piece are already placed in the arc-shaped placement groove, in this step, by bending the aluminum-plastic film sheet, the portions of the arc-shaped battery cell and the battery cell shaping piece that are not covered by the aluminum-plastic film sheet can be covered, and the bent aluminum-plastic film sheet forms an arc-shaped packaging sleeve, and the arc-shaped battery cell and the battery cell shaping piece are completely covered in the arc-shaped packaging sleeve.

[0052] S700: Partially seal the arc-shaped packaging sleeve so that the arc-shaped packaging sleeve has a liquid injection port. In the previous step, the curved aluminum-plastic film sheet forms an arc-shaped packaging sleeve that completely covers the arc-shaped battery cell and the battery cell forming member, but the arc-shaped packaging sleeve is not sealed and cannot contain electrolyte. In this step, the arc-shaped packaging sleeve is partially sealed so that the bottom edge and both sides of the arc-shaped packaging sleeve are in a sealed state, and only the liquid injection port is retained on the top edge of the arc-shaped packaging sleeve to facilitate subsequent liquid injection operations.

[0053] In this embodiment, the battery cell is first pre-stressed, which can quickly bend the flat battery cell into an arc-shaped structure. Since the pre-stressing bending time is short, the arc-shaped battery cell has a greater rebound tendency. For this reason, a battery cell shaping piece is introduced, and the battery cell shaping piece with higher structural strength is connected to the arc-shaped battery cell so that the battery cell shaping piece supports the arc-shaped battery cell to prevent the arc-shaped battery cell from rebounding. Finally, the interconnected battery cell shaping piece and the arc-shaped battery cell are placed in an aluminum-plastic film sheet body with a pre-opened arc-shaped placement groove, and the aluminum-plastic film sheet body is bent and partially sealed to form an arc-shaped packaging sleeve.

[0054] Through a pre-pressing operation with a shorter effect, a flat battery cell can be quickly bent into an arc-shaped structure, which helps to reduce the bending and pressing processing time of the arc-shaped battery, and further improves the processing efficiency of the arc-shaped battery; by fixing and supporting the arc-shaped battery cell through the battery cell shaping piece, the arc-shaped battery cell can be prevented from rebounding, so that the arc-shaped battery cell can better maintain its own curvature during transportation and circulation; by pre-punching an arc-shaped placement groove compatible with the arc-shaped battery cell in the aluminum-plastic film, and placing the battery cell shaping piece and the arc-shaped battery cell in the arc-shaped placement groove, compared with traditional arc-shaped batteries, since there is no need to perform a bending operation on the aluminum-plastic film after packaging, wrinkles caused by the bending operation can be effectively avoided, so that the arc-shaped packaging sleeve has better surface flatness.

[0055] In one of the embodiments, the steps of connecting the battery cell shaping piece with the arc-shaped battery cell are specifically as follows: applying adhesive glue on the battery cell shaping piece; bonding the battery cell shaping piece with the arc-shaped battery cell. In this embodiment, the battery cell shaping piece and the arc-shaped battery cell are connected by bonding with adhesive glue, by applying adhesive glue on the battery cell shaping piece, and fitting the side of the battery cell shaping piece coated with adhesive glue with the arc-shaped battery cell, and after the adhesive glue is cured, the battery cell shaping piece is bonded and fixed to the arc-shaped battery cell. Fixing the battery cell shaping piece with the arc-shaped battery cell by bonding can greatly reduce the space occupied by the battery cell shaping piece and the arc-shaped battery connection structure, which helps to increase the lightness and thinness of the arc-shaped battery.

[0056] In one embodiment, the step of bonding the battery cell shaping piece to the arc-shaped battery cell is specifically as follows: laminating the side of the battery cell shaping piece coated with the adhesive glue to the arc-shaped battery; and low-temperature baking the battery cell shaping piece, the adhesive glue and the arc-shaped battery cell, wherein the temperature of the low-temperature baking is 45°C to 60°C. In this embodiment, after laminating the side of the battery cell shaping piece coated with the adhesive glue to the arc-shaped battery, the adhesive glue is low-temperature baked at 45°C to 60°C to accelerate the curing speed of the adhesive glue. First, it can save time and improve processing efficiency. Second, because the supporting effect of the battery cell shaping piece is weak before the adhesive glue is cured, the arc-shaped battery cell is prone to large deformation during this period. Low-temperature baking can enable the battery cell shaping piece to support the arc-shaped battery cell faster, thereby improving the quality of the arc-shaped battery. Third, when the baking temperature is high, the molecular activity increases, the deformation speed of the curved battery cell will increase, and the strength of the battery cell shaped parts will also decrease. Low-temperature baking at 45°C to 60°C can reduce the adverse effects of baking on the curved battery cell and battery cell shaped parts while increasing the curing speed of the adhesive glue, thereby improving the molding quality of the curved battery.

[0057] In one embodiment, the step of providing the battery cell shaping member is specifically as follows: providing an arc-shaped steel sheet; coating the arc-shaped steel sheet with an anti-corrosion coating so that the surface of the arc-shaped steel sheet is covered with an anti-corrosion protective layer. The battery cell shaping member is used to support and fix the arc-shaped battery cell, so the battery cell shaping member itself needs to have a high strength. In addition, since the battery cell shaping member and the arc-shaped battery cell are arranged together in the aluminum-plastic film packaging sleeve, the battery cell shaping member is always in contact with the electrolyte, so the battery cell shaping member needs to have good chemical stability to prevent the corrosion of the electrolyte. In this embodiment, the battery cell shaping member is an arc-shaped steel sheet with an anti-corrosion protective layer on the surface. The main material of the arc-shaped steel sheet is steel, which has high mechanical strength. By covering the anti-corrosion protective layer on the outer surface of the arc-shaped steel sheet, the arc-shaped steel sheet can have good corrosion resistance to resist the corrosion of the electrolyte. The curvature of the arc-shaped steel sheet is consistent with the curvature of the arc-shaped battery cell after pre-stressing. The arc-shaped surface of the battery cell forming part with the arc-shaped steel sheet is bonded to the arc-shaped surface of the arc-shaped battery. The rebound stress of the arc-shaped battery cell will act on the battery cell forming part. Since the arc-shaped steel sheet has high mechanical strength, it can support the arc-shaped battery cell and prevent the arc-shaped battery cell from deforming, thereby achieving the effect of stabilizing the shape of the arc-shaped battery cell.

[0058] In one embodiment, after the step of coating the arc-shaped steel sheet with anti-corrosion coating and before the step of connecting the battery core shaping piece with the arc-shaped battery core, the following step is also included: performing a corona operation on the anti-corrosion protective layer. In this embodiment, the anti-corrosion protective layer covering the surface of the arc-shaped steel sheet is subjected to a corona operation. After the corona treatment, the anti-corrosion protective layer will form a large number of microporous structures on the side bonded to the arc-shaped battery core. The large number of microporous structures can effectively increase the surface area of ​​the anti-corrosion protective layer. After the adhesive glue is bonded to the anti-corrosion protective layer after the corona treatment, the bonding strength between the battery core shaping piece and the arc-shaped battery core can be increased, so that the battery core shaping piece and the arc-shaped battery core are more integrated, and the rebound stress of the arc-shaped battery core can be better transferred to the battery core shaping piece, so as to achieve a better supporting solidification effect.

[0059] In one embodiment, the anti-corrosion protective layer is a Teflon coating. In this embodiment, the anti-corrosion protective layer is a Teflon coating. The Teflon material has good corrosion resistance. By coating the outer surface of the arc-shaped steel sheet with the Teflon coating, the electrolyte can be effectively blocked to prevent the electrolyte from contacting the arc-shaped steel sheet and causing corrosion of the arc-shaped steel sheet, thereby making the battery core forming part have good chemical stability and can provide long-term and stable support for the arc-shaped battery core in the aluminum-plastic film packaging sleeve.

[0060] In one embodiment, the arc-shaped steel sheet includes a central portion and two edge portions, the two edge portions are respectively connected to the two ends of the central portion, and the thickness of the central portion is greater than the thickness of the edge portions. After pre-pressing, the battery cell forms an arc-shaped battery cell, and the interior of the arc-shaped battery cell has a rebound stress. Compared with the two ends of the arc-shaped battery cell, the central portion of the arc-shaped battery cell is subjected to a greater degree of bending pressure, so that the rebound stress of the central portion is greater. In this embodiment, the thickness of the central portion of the arc-shaped steel sheet is greater than that of the edge portion. The increase in thickness can improve the structural strength, that is, the central portion of the arc-shaped steel sheet has a stronger strength. In this way, the central portion of the arc-shaped battery cell with a larger rebound stress can be better supported and fixed, thereby preventing the arc-shaped battery cell and the battery cell forming member from deforming.

[0061] In one embodiment, the thickness of the central portion is 10% to 15% of the thickness of the arc-shaped battery cell. The thickness of the arc-shaped steel sheet is proportional to its supporting strength. When the thickness of the arc-shaped steel sheet is too small, the battery cell shaping member will not be able to support and fix the arc-shaped battery cell well. When the thickness of the arc-shaped steel sheet is too large, the arc-shaped battery will become bloated. In this embodiment, the thickness of the central portion of the arc-shaped steel sheet is 10% to 15% of the thickness of the arc-shaped battery cell. The central portion of the arc-shaped steel sheet is the part with the largest thickness of the arc-shaped steel sheet. The thickness of the edge portion of the arc-shaped steel sheet does not exceed this thickness range. The arc-shaped steel sheet of this thickness has a good supporting strength and can better play a supporting and fixing role for the arc-shaped battery cell. At the same time, the thickness of the arc-shaped steel sheet is relatively moderate, which can make the arc-shaped battery have a good lightness and thinness.

[0062] In one embodiment, the step of performing a stamping operation on the aluminum-plastic film sheet is specifically as follows: performing a stamping operation on the aluminum-plastic film sheet so that the aluminum-plastic film sheet is provided with a first arc-shaped groove; performing a stamping operation on the aluminum-plastic film sheet again so that the aluminum-plastic film sheet is provided with a second arc-shaped groove, and the second arc-shaped groove is adapted to the first arc-shaped groove. In this embodiment, the aluminum-plastic film sheet is subjected to two stamping operations, that is, a first arc-shaped groove and a second arc-shaped groove that are adapted to each other are respectively stamped out on the aluminum-plastic film sheet. Compared with a single stamping, a single stamping requires a groove that is adapted to the thickness of the battery cell to be stamped out at one time. Therefore, the stamping thickness of a single stamping is larger, which makes the thickness of the aluminum-plastic film sheet thinner, causing the aluminum-plastic film packaging sleeve to be more easily damaged. The two stamping operations can evenly divide the stamping thickness, so that the thickness of the aluminum-plastic film packaging sleeve is larger, which helps to improve the protective effect of the aluminum-plastic film packaging sleeve.

[0063] However, the internal springback stress of the arc-shaped battery cell obtained by rapid stamping is relatively large, and the arc-shaped battery cell will be greatly deformed before being connected to the battery cell shaping piece, which makes it inconvenient to connect to the battery cell shaping piece. Therefore, in one embodiment, the steps of pre-pressing the battery cell are specifically as follows: stamping the battery cell to form the battery cell into an arc-shaped battery cell; placing the arc-shaped battery cell on an arc-shaped surface workbench; and reciprocatingly rolling the side of the arc-shaped battery cell away from the arc-shaped surface workbench. In this embodiment, a flat battery cell is first placed in a stamping die for stamping, and the battery cell is quickly pressed into an arc-shaped structure. Subsequently, the arc-shaped battery cell is placed on an arc-shaped workbench, and the working surface of the arc-shaped workbench is a concave arc surface. After the convex arc surface of the arc-shaped battery cell is placed on the concave arc surface of the arc-shaped workbench, the concave arc surface of the arc-shaped battery cell is reciprocated by a rolling shaft. During the reciprocating rolling process, the interior of the arc-shaped battery cell continuously switches between a compressed and rebounded state. In this process, the rebound stress of the arc-shaped battery cell can be quickly released. After reciprocating rolling, the internal structure of the arc-shaped battery cell will tend to a relatively stable state, and the rebound trend will be relatively mild, which can avoid large deformation before connection with the battery cell forming piece. At the same time, after connection with the battery cell forming piece, the stress applied to the battery cell forming piece can also be reduced, thereby improving the support stability of the battery cell forming piece on the arc-shaped battery cell.

[0064] It can be understood that during the reciprocating rolling of the arc-shaped battery cell, the rolling shaft continuously squeezes and rolls on the concave surface of the arc-shaped battery cell, and the concave surface of the arc-shaped battery cell is easily damaged during the rolling process. To this end, in one embodiment, the step of placing the arc-shaped battery cell on the arc-shaped surface workbench is specifically as follows: providing a soft-package protective cover; placing the arc-shaped battery cell in the soft-package protective cover; placing the soft-package protective cover and the arc-shaped battery cell on the arc-shaped surface workbench; and the step of reciprocatingly rolling the side of the arc-shaped battery cell away from the arc-shaped surface workbench is specifically as follows: reciprocatingly rolling the side of the soft-package protective cover away from the arc-shaped surface workbench. In the present embodiment, before the concave surface of the arc-shaped battery cell is reciprocatingly rolled, the arc-shaped battery cell is placed in a soft-pack protective cover. During the reciprocating rolling, the side of the soft-pack protective cover corresponding to the concave surface of the arc-shaped battery cell is rolled. Since the soft-pack protective cover is a soft plastic cover, the force of the rolling shaft can still be applied to the inside of the arc-shaped battery cell. At the same time, since the concave surface of the arc-shaped battery cell is covered by the soft-pack protective cover, the rolling shaft can avoid directly squeezing the arc-shaped battery cell, thereby avoiding the concave surface of the arc-shaped battery cell from being damaged during the rolling process, thereby achieving the effect of protecting the arc-shaped battery cell.

[0065] It can be understood that although the soft-pack protective cover can isolate the concave surface of the arc-shaped battery cell from the rolling axis and has a certain protective effect, relative movement may occur between the soft-pack protective cover and the concave surface of the arc-shaped battery cell during the reciprocating rolling process. During the relative movement, the inner wall of the soft-pack protective cover will apply friction to the concave surface of the arc-shaped battery, which will cause slight damage to the concave surface of the arc-shaped battery. For this reason, in one embodiment, the step of setting the arc-shaped battery cell in the soft-pack protective cover is specifically as follows: vacuuming the soft-pack protective cover so that the arc surface of the arc-shaped battery cell fits with the inner wall of the soft-pack protective cover. In this embodiment, after placing the arc-shaped battery into the soft-pack protective cover, the soft-pack protective cover is vacuumed. After vacuuming, the inner wall of the soft-pack protective cover will fit closely with the concave surface of the arc-shaped battery cell. When rolling, the soft-pack protective cover and the arc-shaped battery cell can be prevented from sliding relative to each other, thereby avoiding damage to the surface of the arc-shaped battery cell.

[0066] In one of the embodiments, after the step of placing the arc-shaped battery cell in the soft-package protective cover and before the step of placing the soft-package protective cover and the arc-shaped battery cell on the arc-shaped surface workbench, the step further includes: preheating the soft-package protective cover and the arc-shaped battery cell; and reciprocatingly rolling the side of the soft-package protective cover away from the arc-shaped surface workbench. Specifically, the step includes: reciprocatingly rolling the side of the soft-package protective cover away from the arc-shaped surface workbench, and heating the soft-package protective cover and the arc-shaped battery cell at the same time. In this embodiment, before the soft-pack protective cover and the arc-shaped battery cell are rolled, the soft-pack protective cover and the arc-shaped battery cell are preheated to increase the temperature of the arc-shaped battery cell, and the soft-pack protective cover and the arc-shaped battery cell are heated during the reciprocating rolling process to maintain the temperature state of the arc-shaped battery cell. The heated arc-shaped battery cell has good softness and resilience. During the reciprocating rolling process, the rates of compressive deformation and rebound deformation of the heated arc-shaped battery cell will increase, which can more quickly reduce the rebound potential energy accumulated in the arc-shaped battery cell during rapid stamping, thereby quickly stabilizing the structure of the arc-shaped battery cell.

[0067] It can be understood that since the arc-shaped battery cell is heated during the reciprocating rolling process, the air in the soft-pack protective cover expands, and the arc-shaped battery cell will squeeze out the air during the reciprocating rolling process, which increases the amount of air in the soft-pack protective cover, and further causes the soft-pack protective cover to no longer fit the surface of the arc-shaped battery cell, resulting in a decrease in the protective effect of the soft-pack protective cover on the arc-shaped battery cell. To this end, in one embodiment, the step of reciprocatingly rolling the side of the soft-pack protective cover away from the arc-shaped surface workbench and heating the soft-pack protective cover and the arc-shaped battery cell is specifically as follows: reciprocatingly rolling the side of the soft-pack protective cover away from the arc-shaped surface workbench, heating the soft-pack protective cover and the arc-shaped battery cell, and continuously evacuating the soft-pack protective cover. In this embodiment, by continuously evacuating the soft-pack protective cover, the newly added air in the soft-pack protective cover can be removed in time, so that the inner wall of the soft-pack protective cover can continuously maintain a state of being in contact with the surface of the curved battery cell, thereby improving the stability of the protective effect of the soft-pack protective cover on the surface of the curved battery cell.

[0068] It can be understood that when the battery cell shaping piece is bonded to the curved battery cell, since the adhesive glue is not solidified, the squeezed adhesive glue may overflow from the bonding surface of the curved battery cell and flow to the adjacent surface. The adhesive glue flowing to the adjacent surface of the bonding surface will penetrate into the battery cell, resulting in the cycle performance of the battery cell being affected. To this end, in one embodiment, after the step of applying the adhesive glue on the battery cell shaping piece, before the step of bonding the side of the battery cell shaping piece coated with the adhesive glue with the curved battery cell, it also includes the steps of: providing a protective film; bonding the protective film to the adjacent surface of the bonding surface of the curved battery cell. In this embodiment, before bonding the battery cell shaping piece to the curved battery cell, the protective film is first pasted on the adjacent surface of the bonding surface of the curved battery cell. When the glue flows to the adjacent surface of the bonding surface, the protective film can block the adhesive glue and prevent the adhesive glue from penetrating into the battery cell, thereby preventing the cycle performance of the battery cell from being affected.

[0069] It can be understood that when the arc-shaped battery cell is bonded to the battery cell shaping piece, the bonding glue has not yet solidified and cannot provide sufficient bonding force, and the arc-shaped battery cell may still have a tendency to rebound, so the arc-shaped battery cell will be deformed, resulting in poor bonding effect between the arc-shaped battery cell and the battery cell shaping piece, and poor support and solidification effect of the battery cell shaping piece on the arc-shaped battery cell. In one embodiment, after the step of bonding the side of the battery cell shaping piece coated with the bonding glue to the arc-shaped battery, and before the step of low-temperature baking the battery cell shaping piece, the bonding glue and the arc-shaped battery cell, the following step is also included: fixing the battery cell shaping piece and the arc-shaped battery cell by a fixing piece so that the battery cell shaping piece and the arc-shaped battery cell are in contact with each other. In the present embodiment, after the cell shaping piece is fitted onto the arc-shaped cell, the cell shaping piece and the arc-shaped cell are fixed by a fixing piece. Specifically, the fixing piece includes a first fixing block and a second fixing block. After the cell shaping piece is fitted onto the arc-shaped cell, the first fixing block abuts against the concave arc surface of the arc-shaped cell, and the second fixing block abuts against a side of the cell shaping piece away from the convex arc surface of the arc-shaped cell. Through the joint abutment of the first fixing block and the second fixing block, the convex arc surface of the arc-shaped cell can be tightly fitted with the cell shaping piece until the bonding glue is completely cured. In this way, it can be ensured that the arc-shaped cell and the cell shaping piece have a good bonding effect, thereby achieving a better supporting and solidifying effect on the arc-shaped cell.

[0070] Since the central part of the arc-shaped battery cell is deformed to a greater extent, the rebound stress of the central part of the arc-shaped battery cell is greater, and the central part of the arc-shaped battery cell is supported by the central part of the arc-shaped steel sheet, which also requires the central part of the arc-shaped steel sheet to have a higher strength. To this end, in one embodiment, after the step of providing the arc-shaped steel sheet and before the step of coating the anti-corrosion coating on the arc-shaped steel sheet, it also includes the step of providing two arc-shaped reinforcement sheets that match the arc-shaped steel sheet; and welding the two arc-shaped reinforcement sheets to the center positions of the two arc surfaces of the arc-shaped steel sheet respectively. In this embodiment, the two arc-shaped reinforcement sheets are welded to both sides of the arc-shaped steel sheet respectively, so that the two arc-shaped reinforcement sheets are fixed on both sides of the center position of the arc-shaped steel sheet, so that the thickness of the central part of the arc-shaped steel sheet is increased, so that the strength of the central part of the arc-shaped steel sheet is increased, and the arc-shaped battery cell can be better supported.

[0071] In one embodiment, after the step of welding the two arc-shaped reinforcing sheets to the center positions of the two arc surfaces of the arc-shaped steel sheet respectively, and before the step of coating the anti-corrosion coating on the arc-shaped steel sheet, the step further includes: electroplating the arc-shaped steel sheet and the two arc-shaped reinforcing sheets, so that the surfaces of the arc-shaped steel sheet and the two arc-shaped reinforcing sheets are covered with a metal aluminum coating. In this embodiment, the assembly obtained by connecting the arc-shaped steel sheet and the two arc-shaped reinforcing sheets is electroplated, so that the surface of the assembly is attached with a metal aluminum coating, and the metal aluminum coating can completely cover the arc-shaped steel sheet and the two arc-shaped reinforcing sheets, so that the appearance of the arc-shaped fixing sheet is relatively flat, and at the same time, the metal aluminum coating will quickly oxidize in the air to form a dense oxide film, which can prevent the internal structure of the metal cladding from oxidation and corrosion, thereby achieving the effect of extending the service life of the arc-shaped fixing sheet.

[0072] Since the surface roughness of the metal aluminum coating after electroplating is relatively large, when the anti-corrosion coating is applied on the metal aluminum coating, the coating uniformity of the anti-corrosion coating is relatively low. For this reason, in one embodiment, after the step of electroplating the arc-shaped steel sheet and the two arc-shaped reinforcement sheets, and before the step of applying the anti-corrosion coating on the arc-shaped steel sheet, the step of grinding the metal aluminum coating is also included. In this embodiment, by grinding the metal aluminum coating, the surface roughness of the metal aluminum coating can be reduced, and the flatness of its surface can be increased, making it easier to apply Teflon coating on the surface of the metal aluminum coating, thereby helping to improve the coating uniformity of the anti-corrosion coating.

[0073] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A curved battery shaping structure, characterized in that: include: An arc-shaped battery cell, the arc-shaped battery cell comprising a battery cell body and a first connecting portion, wherein the first connecting portion is arranged on a convex arc surface of the battery cell body; A cell shaping piece, the cell shaping piece comprising an arc-shaped fixing piece and a second connecting portion, the second connecting portion being arranged on a concave arc surface of the arc-shaped fixing piece, and the first connecting portion being connected to the second connecting portion; The arc-shaped battery shaping structure further includes an arc-shaped adhesive layer, the concave arc surface of the arc-shaped adhesive layer is bonded to the first connecting portion, and the convex arc surface of the arc-shaped adhesive layer is bonded to the second connecting portion; The arc-shaped fixing sheet includes an arc-shaped steel sheet and a first arc-shaped reinforcement sheet, the arc-shaped steel sheet includes a central portion and two edge portions, the two edge portions are respectively connected to two ends of the central portion in one piece, and the convex arc surface of the first arc-shaped reinforcement sheet is welded to the concave arc surface of the central portion; The arc-shaped fixing plate further comprises a second arc-shaped reinforcing plate, the concave arc surface of the second arc-shaped reinforcing plate being welded to the convex arc surface of the central portion; The arc-shaped fixing sheet further comprises a metal covering member, and the metal covering member covers the arc-shaped steel sheet, the first arc-shaped reinforcement sheet and the second arc-shaped reinforcement sheet respectively; The battery core shaping member further comprises an anti-corrosion coating member, the anti-corrosion coating member is coated on the metal coating member, and the second connecting portion is arranged on the anti-corrosion coating member; Wherein, the thickness of the central portion is greater than the thickness of the edge portion; The thickness of the central portion is 10% to 15% of the thickness of the arc-shaped battery core.

2. The arc-shaped battery shaping structure according to claim 1, characterized in that: The second connecting portion is provided with a corona layer.

3. The arc-shaped battery shaping structure according to claim 1, characterized in that: The battery cell body is a laminated battery cell or a wound battery cell.

4. The arc-shaped battery shaping structure according to claim 1, characterized in that: The concave arc surface of the arc-shaped fixing plate is matched with the convex arc surface of the battery core body.

5. A curved soft-pack battery, characterized in that: The arc-shaped battery shaping structure comprises the arc-shaped soft-pack battery further comprising an aluminum-plastic film packaging sleeve, the aluminum-plastic film packaging sleeve is provided with arc-shaped receiving grooves and connecting holes interconnected with each other, the arc-shaped battery cell further comprises a battery cell tab, the battery cell tab is connected to the battery cell body, the battery cell body and the battery cell shaping member are both arranged in the arc-shaped receiving groove, and the battery cell tab is penetrated through the connecting hole.

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