Battery shell processing device, battery shell processing method, battery shell and battery

Abstract

The invention relates to the field of battery production devices, in particular to a battery shell processing device, a battery shell processing method, a battery shell and a battery. The battery shell processing device comprises a first pit punching mechanism, a second pit punching mechanism and a shaping mechanism; the first pit punching mechanism comprises a first male die and a first female die, the first male die is of a square structure, the bottom of the first male die is provided with a first R angle, and the first female die is provided with a first forming groove matched with the first male die. The second pit punching mechanism comprises a second male die and a second female die, the second male die is of a square structure, the bottom of the second male die is provided with a second R angle, the second female die is provided with a second forming groove matched with the second male die, the depth of the first forming groove is equal to that of the second forming groove, and the width of the first male die is larger than that of the second male die. The radius of the first R angle is greater than that of the second R angle; the shaping mechanism further comprises a first clamp and a second clamp, the first clamp is provided with a first shaping face, and the second clamp is provided with a second shaping face. Compared with the prior art, the width of the battery shell can be reduced, and the energy density of the battery can be improved.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a battery shell processing device, a battery shell processing method, a battery shell and a battery. Background Art

[0002] As battery products have higher and higher requirements for the energy density of lithium-ion batteries, how to make the best use of limited product space to improve the energy density of products is becoming more and more critical. The size of soft-package lithium-ion batteries is composed of thickness, width and length. When the material system is fixed, making full use of these three dimensions is the most effective way to improve energy density. The most commonly used measure in the thickness direction is to reduce the thickness of the substrate (copper foil, aluminum foil, diaphragm, adhesive tape, tabs and aluminum-plastic film).

[0003] like Figure 7 As shown, the existing soft-pack battery includes an upper and lower sub-shell, each of which is provided with a receiving groove, and the structures and sizes of the receiving grooves on the two sub-shells are the same. The outer edges of the upper and lower sub-shells are hot-fused and then folded to finally form a battery shell. The two folded edges in the width direction of the battery protrude from the main part of the battery shell respectively, and the folded edges are located on the intersection of the two receiving grooves. The width A of the folded edge protruding from the main part of the battery shell determines the overall width of the soft-pack battery.

[0004] The existing battery casing is relatively wide, which affects the energy density of the battery. Summary of the invention

[0005] The embodiments of the present invention provide a battery case processing device, a battery case processing method, a battery case and a battery, so as to solve the problem that the existing battery case is too wide and affects the energy density of the battery.

[0006] On the one hand, an embodiment of the present invention provides a battery casing processing device, including a first punching mechanism, a second punching mechanism and a shaping mechanism; The first punching mechanism comprises a first convex mold and a first concave mold, the bottom of the first convex mold has a first R angle, and the first convex mold can move along a first direction and enter the first concave mold, so that a first accommodating groove is punched out on the first aluminum-plastic film between the first convex mold and the first concave mold; The second punching mechanism comprises a second convex mold and a second concave mold, the bottom of the second convex mold has a second R angle, and the second convex mold can move along the first direction and enter the second concave mold, so that a second accommodating groove is punched out on the second aluminum-plastic film between the first convex mold and the first concave mold; The size of the first convex mold in the second direction is larger than the size of the second convex mold in the second direction, and the radius of the first R angle is larger than the radius of the second R angle; wherein the first direction is perpendicular to the second direction; The shaping mechanism is used to shape the first aluminum-plastic film and the second aluminum-plastic film after heat sealing. The shaping mechanism includes a first clamp and a second clamp. The first clamp has a first shaping surface, and the second clamp has a second shaping surface. The first shaping surface is used to shape the end of the first aluminum-plastic film close to the side seal after the first aluminum-plastic film and the second aluminum-plastic film are hot-fused, and the second shaping surface is used to shape the end of the second aluminum-plastic film close to the side seal after the first aluminum-plastic film and the second aluminum-plastic film are hot-fused, so that the side seal formed by the first aluminum-plastic film and the second aluminum-plastic film after hot-fusion deviates from the intersection surface of the first accommodating groove and the second accommodating groove.

[0007] Optionally, the width of the first convex mold in the second direction is greater than the width of the second convex mold in the second direction, and the difference between the width of the first convex mold in the second direction and the width of the second convex mold in the second direction is 0.5-1.5 mm; The radius range of the first R angle is ; The radius range of the second R angle is ; Where a is the thickness of the battery core.

[0008] Optionally, the first shaping surface is an arc surface, and the radius of the first shaping surface is greater than and is smaller than the radius of the first R angle; The second shaping surface is an arc surface, and the radius of the second shaping surface is greater than and is smaller than the radius of the second R angle; the vertical distance between one end of the first shaping surface close to the side edge seal and one end away from the side edge seal along the first direction is d1, and the vertical distance between one end of the second shaping surface close to the side edge seal and one end away from the side edge seal along the first direction is d2, d1>d2; wherein a is the thickness of the battery core.

[0009] Optionally, the radius of the first shaping surface is , the radius of the second shaping surface is to ; Where a is the thickness of the battery core.

[0010] On the other hand, an embodiment of the present invention further provides a battery casing processing method, which is applied to the above-mentioned battery casing processing device, comprising: Punching out the first receiving groove on the first aluminum-plastic film, and punching out the second receiving groove on the second aluminum-plastic film; The first aluminum-plastic film and the second aluminum-plastic film are stacked in the first direction, and the first receiving groove is connected to the second receiving groove; Hot-melting the outer edge of the first aluminum-plastic film and the outer edge of the second aluminum-plastic film to form a side edge seal; shaping one end of the first aluminum-plastic film close to the side edge seal and one end of the second aluminum-plastic film close to the side edge seal so that the side edge seal deviates from a reference surface along the first direction; wherein the reference surface is the intersection surface of the first receiving groove and the second receiving groove; The side seal is bent in the first direction toward the first aluminum-plastic film.

[0011] Optionally, punching out the first receiving groove on the first aluminum-plastic film and punching out the second receiving groove on the second aluminum-plastic film comprises: The first aluminum-plastic film is placed between the first male mold and the first female mold; The first convex mold moves toward the first concave mold and gradually enters the first concave mold to punch out the first aluminum-plastic film; The second aluminum-plastic film is placed between the second male mold and the second female mold; The second convex mold moves toward the second concave mold and gradually enters the second concave mold to punch out the second aluminum-plastic film.

[0012] Optionally, the step of hot-melting the outer edges of the first aluminum-plastic film and the second aluminum-plastic film to form the side edge seal comprises: The side edges of the first aluminum-plastic film are aligned and attached to the side edges of the second aluminum-plastic film one by one; The side edge of the first aluminum-plastic film and the side edge of the second aluminum-plastic film that have been aligned and bonded are hot-fused to form the side edge seal.

[0013] Optionally, the side edges of the first aluminum-plastic film are aligned and attached to the side edges of the second aluminum-plastic film one by one, including: Aligning and laminating the first side edge of the first aluminum-plastic film and the first side edge of the second aluminum-plastic film; The second side edge of the second aluminum-plastic film is aligned and attached to the second side edge of the second aluminum-plastic film.

[0014] Optionally, the step of hot-melting the aligned and bonded side edges of the first aluminum-plastic film and the second aluminum-plastic film to form the side edge seal comprises: Hot-melt the first side edge of the first aluminum-plastic film and the first side edge of the second aluminum-plastic film after lamination to form a first side edge seal; The second side edge of the second aluminum-plastic film and the second side edge of the second aluminum-plastic film after lamination are hot-fused to form a second side sealed edge.

[0015] Optionally, the step of hot-melting the aligned and bonded side edges of the first aluminum-plastic film and the second aluminum-plastic film to form the side edge seal further comprises: Applying curing glue to the outer edge of the first side seal and the outer edge of the second side seal respectively; After the curing adhesive is cured, hot melt adhesive is applied to a surface of the first side edge seal close to the first aluminum-plastic film and a surface of the second side edge seal close to the first aluminum-plastic film respectively; bend the first side edge seal in a first direction toward the first aluminum-plastic film; The second side seal is bent in a first direction toward the first aluminum-plastic film.

[0016] Optionally, shaping one end of the first aluminum-plastic film close to the side edge seal and one end of the second aluminum-plastic film close to the side edge seal so that the side edge seal deviates from the reference surface along the first direction includes: Placing the first aluminum-plastic film and the second aluminum-plastic film between the first clamp and the second clamp provided on the battery casing processing device; The first clamp and the second clamp are clamped, the first shaping surface of the first clamp presses one end of the first aluminum-plastic film close to the side seal, and the second shaping surface of the second clamp presses one end of the second aluminum-plastic film close to the side seal.

[0017] Optionally, also include: Bending the heat-melted side seal toward the first aluminum-plastic film in a first direction; Measuring a first dimension of the side edge seal in the second direction, and resetting the side edge seal; Bending the shaped side seal edge toward the first aluminum-plastic film in the first direction; Measuring a second dimension of the side edge seal in the second direction, and resetting the side edge seal; A difference between the first size and the second size is calculated, and the difference is compared with a preset difference.

[0018] In another aspect, an embodiment of the present invention further provides a battery shell, wherein the battery shell system is a battery shell manufactured by using the above-mentioned battery shell processing device and according to the above-mentioned battery shell processing method. On the other hand, an embodiment of the present invention further provides a battery, wherein the battery uses the battery casing as described above.

[0019] The embodiments of the present invention provide a battery case processing device, a battery case processing method, a battery case and a battery. The first receiving groove and the second receiving groove punched out by the battery case processing device of the present application have different sizes. When the first aluminum-plastic film and the second aluminum-plastic film are hot-melted to form the battery case, after the hot-melt, the R angles and side walls of the first aluminum-plastic film and the second aluminum-plastic film are shaped by a shaping tool so that the side sealing edge deviates from the intersection of the first receiving groove and the second receiving groove, thereby reducing the overall width of the battery case compared with the prior art and improving the energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0021] Figure 1 is a stamping schematic diagram of a battery housing processing device in one embodiment of the present invention; Figure 2 is a schematic diagram of a battery casing processing device according to an embodiment of the present invention; Figure 3 Schematic diagram of a battery shell before shaping by a battery shell processing device in one embodiment of the present invention; Figure 4 is a schematic diagram of a finished product of a processing method for a battery housing according to an embodiment of the present invention; Figure 5 Schematic diagram of applying curing adhesive and hot melt adhesive in a method for processing a battery shell according to an embodiment of the present invention; Figure 6 Schematic diagram of the position of applying curing glue in a method for processing a battery shell in one embodiment of the present invention; Figure 7 It is a schematic diagram of a battery in the prior art.

[0022] Description of the drawings: 100, first aluminum-plastic film; 101, first receiving groove; 200, second aluminum-plastic film; 201, second receiving groove; 300, interface; 400, pole core; 500, first shell R angle; 600, second shell R angle; 700, first side edge sealing; 800, second side edge sealing; 11. First punch; 111. First R angle; 12. First die; 121. First molding groove; 21. Second punch; 211. Second R angle; 22. Second die; 221. Second molding groove; 31. First fixture; 311. First shaping surface; 32. Second fixture; 321. Second shaping surface; 41. Curing adhesive; 42. Hot melt adhesive. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figure 1-Figure 6 As shown, an embodiment of the present invention provides a battery shell processing device, including a first punching mechanism, a second punching mechanism and a shaping mechanism; specifically refer to Figure 1 The first punching mechanism includes a first punch 11 and a first die 12. The first punch 11 is a square structure. The bottom of the first punch 11 has a first R angle 111. The first die 12 is provided with a first forming groove 121 adapted to the first punch 11. Before punching, the first aluminum-plastic film 100 is placed between the first punch 11 and the first die 12. The first punch 11 can move toward the first die 12, and the first receiving groove 101 is punched out in the middle of the first aluminum-plastic film 100. The second punching mechanism includes a second punch 21 and a second die 22. The second punch 21 is a square structure. The bottom of the second punch 21 has a second R angle 211. The second die 22 is provided with a second forming groove 221 adapted to the second punch 21. Before punching, the second aluminum-plastic film 200 is placed between the second punch 21 and the second die 22. The second punch 21 can move toward the second die 22, and the second receiving groove 201 is punched out in the middle of the second aluminum-plastic film 200. The depth of the first molding groove 121 is equal to the depth of the second molding groove 221, the depth direction of the first molding groove is parallel to the first direction, the width of the first punch 11 is greater than the width of the second punch 21, the width direction of the first punch 11 is parallel to the width direction of the punched first accommodating groove 101, the width direction of the second punch 21 is parallel to the width direction of the punched second accommodating groove 201, the width direction of the first punch 11 is parallel to the second direction, the radius of the first R angle 111 is greater than the radius of the second R angle 211; the first direction is perpendicular to the second direction.

[0027] In other words, the first direction is the direction in which the first convex mold 11 enters the first concave mold 12, so that the depth direction of the first receiving groove 101 is also the first direction. After the edge of the first aluminum-plastic film 100 and the edge of the second aluminum-plastic film 200 are hot-fused, they can be regarded as a battery shell. The first direction is the thickness direction of the pole core 400 in the battery shell, that is, the thickness direction of the battery shell. The thickness direction of the battery shell is parallel to the depth direction of the first receiving groove 101. The second direction is the direction in which the second seal and the side seal of the first aluminum-plastic film 100 are located. The third direction is the direction in which the top seal of the battery shell formed by the first aluminum-plastic film 100 and the second aluminum-plastic film 200 after hot-fusion is located.

[0028] Specific reference Figure 1 and Figure 2 The shaping mechanism is used to shape the first aluminum-plastic film and the second aluminum-plastic film after heat sealing. The shaping mechanism includes a first clamp 31 and a second clamp 32. The first clamp 31 has a first shaping surface 311, and the second clamp 32 has a second shaping surface 321. The first shaping surface 311 is used to shape the end of the first aluminum-plastic film close to the side sealing edge after the first aluminum-plastic film and the second aluminum-plastic film are hot-fused. The second shaping surface 321 is used to shape the end of the second aluminum-plastic film close to the side sealing edge after the first aluminum-plastic film and the second aluminum-plastic film are hot-fused, so that the side sealing edge formed by the first aluminum-plastic film and the second aluminum-plastic film after hot-fusion deviates from the intersection surface of the first receiving groove and the second receiving groove.

[0029] Before the first aluminum-plastic film and the second aluminum-plastic film are punched out of the first accommodating groove and the second accommodating groove respectively, the first die 12 and the second die 22 in this embodiment are integrally formed, and the opening directions of the first molding groove 121 and the second molding groove 221 are the same, so that when punching, the first punch 11 and the second punch 21 simultaneously enter the molding groove from one side of the whole formed by the first groove and the second die 22.

[0030] Therefore, in this embodiment, the first aluminum-plastic film 100 and the second aluminum-plastic film 200 are also integrally formed. In other words, in this embodiment, the first aluminum-plastic film 100 and the second aluminum-plastic film 200 are the same aluminum-plastic film. A piece of aluminum-plastic film is placed on the whole formed by the first concave mold 12 and the second concave mold 22, and the first convex mold 11 and the second convex mold 21 simultaneously punch out the first receiving groove 101 and the second receiving groove 201 from the piece of aluminum-plastic film. After punching, the piece of aluminum-plastic film is folded in half, and the fold line divides the piece of aluminum-plastic film into the first aluminum-plastic film 100 and the second aluminum-plastic film 200.

[0031] Reference Figure 7 , the size and structure of the first receiving groove 101 on the existing aluminum-plastic film are the same as the size and structure of the second receiving groove 201. And the thickness value of the pole core 400 of the existing battery is a, and the radius of all the R angles of the shell of the corresponding existing battery is the same, and the radius of the R angle of the battery shell is half of the thickness value of the pole core 400 of the battery, that is, the radius of the R angle of the battery shell is a / 2. At this time, it means that the size and structure of the two molding grooves on the existing concave mold are the same. Therefore, there is no need for a shaping mechanism in the prior art.

[0032] Reference Figure 2 and Figure 3 However, the first receiving groove 101 and the second receiving groove 201 punched out by the battery shell processing device of the present application have different sizes. When the first aluminum-plastic film 100 and the second aluminum-plastic film 200 are hot-melted to form a battery shell, the first aluminum-plastic film 100 and the second aluminum-plastic film 200 need to be shaped so that the side sealing edge deviates from the intersection surface 300 of the first receiving groove 101 and the second receiving groove 201.

[0033] However, unlike the prior art, the width of the first punch in the second direction is greater than the width of the second punch in the second direction, and the difference between the width of the first punch in the second direction and the width of the second punch in the second direction is 0.5-1.5 mm; that is, in this embodiment, the width of the first punch 11 is 0.5-1.5 mm greater than the width of the second punch 21, and correspondingly, the width of the first molding groove 121 is 0.5-1.5 mm greater than the width of the second molding groove 221, so that after the aluminum-plastic film is punched, the width of the first receiving groove 101 on the first aluminum-plastic film 100 is 0.5-1.5 mm greater than the width of the second receiving groove 201 on the second aluminum-plastic film 200. In this embodiment, the radius range of the first R angle 111 is The radius range of the second R angle 211 is ; Where a is the thickness of the battery core.

[0034] Reference Figure 2 The R angle of the first receiving groove 101 on the first aluminum-plastic film 100 is referred to as a first shell R angle 500; the radius of the first shell R angle 500 in this embodiment is 0.5-1.5 mm greater than the radius of the R angle of the battery shell in the prior art, and the R angle of the second receiving groove 201 on the second aluminum-plastic film 200 is referred to as a second shell R angle 600. The radius of the second shell R angle 600 in this embodiment is 0.5-1.5 mm less than the radius of the R angle of the battery shell in the prior art.

[0035] After hot melting, the R angles and side walls of the first aluminum-plastic film 100 and the second aluminum-plastic film 200 are shaped by a shaping tool so that the side sealing edge deviates from the interface 300 of the first receiving groove 101 and the second receiving groove 201 .

[0036] As an example, the first shaping surface 311 is an arc surface, and the first shaping surface 311 is used to extrude the R angle of one end of the first aluminum-plastic film 100. Specifically, the first shaping surface 311 is used to extrude the R angle of one end of the first aluminum-plastic film and the side wall between the R angle and the side seal. The radius of the first shaping surface 311 is greater than a / 2 and less than the radius of the first R angle 111; the second shaping surface 321 is an arc surface, and the second shaping surface 312 is used to extrude the R angle of one end of the second aluminum-plastic film and the side wall between the R angle and the side seal. The radius of the second shaping surface is greater than a / 2 and less than the radius of the second R angle 211; the thickness of the first shaping surface 311 along the first direction is greater than the thickness of the second shaping surface 312 along the first direction. For ease of understanding, the vertical distance between the end of the first fixture of the first shaping surface close to the side edge seal and the end away from the side edge seal along the first direction is d1, and the vertical distance between the end of the second shaping surface close to the side edge seal and the end away from the side edge seal along the first direction is d2, d1>d2 and d1+d2=a.

[0037] Specifically, the radius of the first shaping surface 311 is , the radius of the second shaping surface is ; Where a is the thickness of the battery core.

[0038] In this embodiment, the first clamp 31 and the second clamp 32 are both made of rubber and have a certain deformation amount. When the first aluminum-plastic film 100 and the second aluminum-plastic film 200 are squeezed, the first clamp 31 can be reduced from scratching the first aluminum-plastic film 100 and the second clamp 32 can be reduced from scratching the second aluminum-plastic film 200. In addition, the pressure applied by the first clamp 31 and the second clamp 32 made of rubber is more uniform.

[0039] Refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 In one embodiment, the embodiment of the present invention provides a processing method for a battery shell, which is applied to the battery shell processing device of the claim, comprising: punching out a first receiving groove 101 on a first aluminum-plastic film 100, and punching out a second receiving groove 201 on a second aluminum-plastic film 200; stacking the first aluminum-plastic film 100 and the second aluminum-plastic film 200 in a first direction, with the first receiving groove 101 communicating with the second receiving groove 201; hot-melting the outer edge of the first aluminum-plastic film 100 and the outer edge of the second aluminum-plastic film 200 to form a side seal; shaping one end of the first aluminum-plastic film 100 close to the side seal and one end of the second aluminum-plastic film 200 close to the side seal so that the side seal deviates from a reference surface along the first direction; wherein the reference surface is the intersection 300 of the first receiving groove 101 and the second receiving groove 201; bending the side seal along the first direction.

[0040] In this embodiment, the first aluminum-plastic film 100 and the second aluminum-plastic film 200 are connected by hot melting after stamping. After connection, the first aluminum-plastic film 100 and the second aluminum-plastic film 200 are shaped by the first clamp 31 and the second clamp 32 of the shaping mechanism. When the first aluminum-plastic film 100 is shaped, its R angle and side wall that are wider than the second aluminum-plastic film 200 are gradually bent toward the first direction, so that the first aluminum-plastic film 100 protrudes from the intersection 300 of the first receiving groove 101 and the second receiving groove 201 toward the bottom wall direction of the second aluminum-plastic film 200, and the margin in the width direction of the first aluminum-plastic film 100 is converted into the first direction by shaping. Finally, the edge of the first aluminum-plastic film 100 and the edge of the second aluminum-plastic film 200 deviate from the intersection 300 of the first receiving groove 101 and the second receiving groove 201.

[0041] In this embodiment, the depths of the first accommodating groove 101 and the second accommodating groove 201 do not change, and only the side edges of the first aluminum-plastic film 100 and the side edges of the second aluminum-plastic film 200 are deformed.

[0042] As an example, punching out the first receiving groove 101 on the first aluminum-plastic film 100 and punching out the second receiving groove 201 on the second aluminum-plastic film 200 includes: The first aluminum-plastic film 100 is placed between the first male mold 11 and the first female mold 12; The first male die 11 moves toward the first female die 12 and gradually enters the first molding groove 121 to punch the first aluminum-plastic film 100; The second aluminum-plastic film 200 is placed between the second male mold 21 and the second female mold 22; The second convex mold 21 moves toward the second concave mold 22 and gradually enters the second molding groove 221 to punch the second aluminum-plastic film 200 .

[0043] As an example, the outer edge of the first aluminum-plastic film 100 and the outer edge of the second aluminum-plastic film 200 are hot-melted to form a side edge seal, which includes: The side edges of the first aluminum-plastic film 100 and the side edges of the second aluminum-plastic film 200 are aligned and attached one by one; The side edges of the aligned and bonded first aluminum-plastic film 100 and the side edges of the second aluminum-plastic film 200 are hot-fused to form side sealing edges.

[0044] Before side sealing, the first aluminum-plastic film 100 and the second aluminum-plastic film 200 need to form a battery shell.

[0045] Reference Figure 2 As an example, the step of shaping one end of the first aluminum-plastic film 100 close to the side edge seal and one end of the second aluminum-plastic film 200 close to the side edge seal so that the side edge seal deviates from the reference surface along the first direction includes: The first aluminum-plastic film 100 and the second aluminum-plastic film 200 are placed between a first clamp 31 and a second clamp 32 provided on the battery case processing device; The first clamp 31 and the second clamp 32 are clamped, the first shaping surface 311 of the first clamp 31 presses one end of the first aluminum-plastic film 100 close to the side sealing edge, and the second shaping surface 321 of the second clamp 32 presses one end of the second aluminum-plastic film 200 close to the side sealing edge.

[0046] As an example, the side edges of the first aluminum-plastic film 100 are aligned and attached to the side edges of the second aluminum-plastic film 200 one by one, including: Align and bond the first side edge of the first aluminum-plastic film 100 and the first side edge of the second aluminum-plastic film 200; The second side edge of the second aluminum-plastic film 200 is aligned and attached to the second side edge of the second aluminum-plastic film 200 .

[0047] As an example, the side edges of the aligned and bonded first aluminum-plastic film 100 and the side edges of the second aluminum-plastic film 200 are hot-fused to form side sealing edges; The first side edge of the first aluminum-plastic film 100 and the first side edge of the second aluminum-plastic film 200 are hot-melted to form a first side sealing edge 700; The second side edge of the laminated second aluminum-plastic film 200 and the second side edge of the second aluminum-plastic film 200 are hot-fused to form a second side sealing edge 800 .

[0048] Reference Figure 3 , Figure 5 and Figure 6 As an example, the side edge sealing includes applying curing glue 41 to the outer edge of the first side edge sealing 700 and the outer edge of the second side edge sealing 800 respectively; After the curing adhesive 41 is cured, hot melt adhesive 42 is applied to the surface of the first side edge seal 700 close to the first aluminum-plastic film 100 and the surface of the second side edge seal 800 close to the first aluminum-plastic film 100 respectively; The first side edge seal 700 is bent along the first direction along one end close to the first aluminum-plastic film 100; The second side edge seal 800 is bent along the first direction along one end close to the first aluminum-plastic film 100 , and the second side edge seal 800 is also bent along the first direction, so that the first side edge seal 700 and the second side edge seal 800 are bent toward the same side.

[0049] Refer to Figure 7 and Figure 4 , as an example, also includes Bend the heat-melted side edge seal toward the first aluminum-plastic film 100 in a first direction; Measuring a first dimension A of the side edge seal in the second direction, and resetting the side edge seal; Bending the shaped side seal edge toward the first aluminum-plastic film 100 in the first direction; Measuring a second dimension B of the side edge seal in the second direction, and resetting the side edge seal; A difference between the first size and the second size is calculated, and the difference is compared with a preset difference.

[0050] Specifically, the side edge is bent before shaping, and after measuring the first dimension A of the side edge, the side edge is reset; After shaping, bend the side sealing edge, measure the second dimension B and reset the side sealing edge; Compare the difference between AB. If the difference is less than 0.2mm, continue the plastic surgery. If the difference is greater than 0.2 mm, side sealing is performed.

[0051] In this embodiment, both the first side edge seal 700 and the second side edge seal 800 need to be compared and judged respectively.

[0052] In this embodiment, compared with the prior art, the energy density of the battery is increased by 0.56%.

[0053] In one embodiment, the present invention further provides a battery shell, wherein the battery shell system is manufactured using the battery shell processing device described above and according to the battery shell processing method described above in claim 1. In one embodiment, the present invention further provides a battery, wherein the battery uses the battery casing as described above.

[0054] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A battery casing processing device, characterized in that: It includes a first flushing mechanism, a second flushing mechanism and a shaping mechanism; The first punching mechanism comprises a first convex mold and a first concave mold, the bottom of the first convex mold has a first R angle, and the first convex mold can move along a first direction and enter the first concave mold, so that a first accommodating groove is punched out on the first aluminum-plastic film between the first convex mold and the first concave mold; The second punching mechanism comprises a second convex mold and a second concave mold, the bottom of the second convex mold has a second R angle, and the second convex mold can move along the first direction and enter the second concave mold, so that a second accommodating groove is punched out on the second aluminum-plastic film between the first convex mold and the first concave mold; The size of the first convex mold in the second direction is larger than the size of the second convex mold in the second direction, and the radius of the first R angle is larger than the radius of the second R angle; wherein the first direction is perpendicular to the second direction; The shaping mechanism is used to shape the first aluminum-plastic film and the second aluminum-plastic film after heat sealing. The shaping mechanism includes a first clamp and a second clamp. The first clamp has a first shaping surface, and the second clamp has a second shaping surface. The first shaping surface is used to shape the end of the first aluminum-plastic film close to the side seal after the first aluminum-plastic film and the second aluminum-plastic film are hot-fused, and the second shaping surface is used to shape the end of the second aluminum-plastic film close to the side seal after the first aluminum-plastic film and the second aluminum-plastic film are hot-fused, so that the side seal formed by the first aluminum-plastic film and the second aluminum-plastic film after hot-fusion deviates from the intersection surface of the first accommodating groove and the second accommodating groove.

2. The battery case processing device according to claim 1, characterized in that: The width of the first convex mold in the second direction is greater than the width of the second convex mold in the second direction, and the difference between the width of the first convex mold in the second direction and the width of the second convex mold in the second direction is 0.5-1.5 mm; The radius range of the first R angle is ; The radius range of the second R angle is ; Where a is the thickness of the battery core.

3. The battery case processing device according to claim 1, characterized in that: The first shaping surface is an arc surface, and the radius of the first shaping surface is greater than and is smaller than the radius of the first R angle; The second shaping surface is an arc surface, and the radius of the second shaping surface is greater than and is smaller than the radius of the second R angle; the vertical distance between one end of the first shaping surface close to the side edge seal and one end away from the side edge seal along the first direction is d1, the vertical distance between one end of the second shaping surface close to the side edge seal and one end away from the side edge seal along the first direction is d2, d1>d2 and d1+d2=a; wherein a is the thickness of the battery core.

4. The battery case processing device according to claim 1, characterized in that: The radius of the first shaping surface is , the radius of the second shaping surface is to ; Where a is the thickness of the battery core.

5. A battery shell processing method, applied to the battery shell processing device according to any one of claims 1 to 4, characterized in that: include: Punching out the first receiving groove on the first aluminum-plastic film, and punching out the second receiving groove on the second aluminum-plastic film; The first aluminum-plastic film and the second aluminum-plastic film are stacked in the first direction, and the first receiving groove is connected to the second receiving groove; Hot-melting the outer edge of the first aluminum-plastic film and the outer edge of the second aluminum-plastic film to form a side edge seal; shaping one end of the first aluminum-plastic film close to the side edge seal and one end of the second aluminum-plastic film close to the side edge seal so that the side edge seal deviates from a reference surface along the first direction; wherein the reference surface is the intersection surface of the first receiving groove and the second receiving groove; The side seal is bent in the first direction toward the first aluminum-plastic film.

6. The battery casing processing method according to claim 5, characterized in that: Punching out the first receiving groove on the first aluminum-plastic film and punching out the second receiving groove on the second aluminum-plastic film comprises: The first aluminum-plastic film is placed between the first male mold and the first female mold; The first convex mold moves toward the first concave mold and gradually enters the first concave mold to punch out the first aluminum-plastic film; The second aluminum-plastic film is placed between the second male mold and the second female mold; The second convex mold moves toward the second concave mold and gradually enters the second concave mold to punch out the second aluminum-plastic film.

7. The method for processing a battery casing according to claim 5, characterized in that: The step of hot-melting the outer edge of the first aluminum-plastic film and the outer edge of the second aluminum-plastic film to form a side edge seal comprises: The side edges of the first aluminum-plastic film are aligned and attached to the side edges of the second aluminum-plastic film one by one; The side edge of the first aluminum-plastic film and the side edge of the second aluminum-plastic film that have been aligned and bonded are hot-fused to form the side edge seal.

8. The method for processing a battery casing according to claim 7, characterized in that: The side edges of the first aluminum-plastic film are aligned and attached to the side edges of the second aluminum-plastic film one by one, including: Aligning and laminating the first side edge of the first aluminum-plastic film and the first side edge of the second aluminum-plastic film; The second side edge of the second aluminum-plastic film is aligned and attached to the second side edge of the second aluminum-plastic film.

9. The method for processing a battery casing according to claim 8, characterized in that: The step of hot-melting the aligned and bonded side edges of the first aluminum-plastic film and the second aluminum-plastic film to form the side edge seal comprises: Hot-melt the first side edge of the first aluminum-plastic film and the first side edge of the second aluminum-plastic film after lamination to form a first side edge seal; The second side edge of the second aluminum-plastic film and the second side edge of the second aluminum-plastic film after bonding are hot-fused to form a second side sealed edge.

10. The battery casing processing method according to claim 9, characterized in that: The step of hot-melting the aligned and bonded side edges of the first aluminum-plastic film and the second aluminum-plastic film to form the side edge seal further comprises: Applying curing glue to the outer edge of the first side seal and the outer edge of the second side seal respectively; After the curing adhesive is cured, hot melt adhesive is applied to a surface of the first side edge seal close to the first aluminum-plastic film and a surface of the second side edge seal close to the first aluminum-plastic film respectively; bend the first side edge seal in a first direction toward the first aluminum-plastic film; The second side seal is bent in a first direction toward the first aluminum-plastic film.

11. The battery casing processing method according to claim 5, characterized in that: The step of shaping one end of the first aluminum-plastic film close to the side edge seal and one end of the second aluminum-plastic film close to the side edge seal so that the side edge seal deviates from the reference surface along the first direction comprises: Placing the first aluminum-plastic film and the second aluminum-plastic film between the first clamp and the second clamp provided on the battery casing processing device; The first clamp and the second clamp are clamped, the first shaping surface of the first clamp presses one end of the first aluminum-plastic film close to the side seal, and the second shaping surface of the second clamp presses one end of the second aluminum-plastic film close to the side seal.

12. The battery casing processing method according to claim 5, characterized in that: Also includes: Bending the heat-melted side edge seal toward the first aluminum-plastic film in a first direction; Measuring a first dimension of the side edge seal in the second direction, and resetting the side edge seal; Bending the shaped side seal edge toward the first aluminum-plastic film in the first direction; Measuring a second dimension of the side edge seal in the second direction, and resetting the side edge seal; A difference between the first size and the second size is calculated, and the difference is compared with a preset difference.

13. A battery casing, characterized in that: The battery shell system is a battery shell made by using the battery shell processing device described in any one of claims 1 to 4 and the battery shell processing method described in any one of claims 5 to 12.

14. A battery, characterized in that: The battery uses the battery case according to claim 13.

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