Battery folding device and battery processing equipment

Abstract

The invention discloses a battery folding device and battery processing equipment; when the battery is folded, the pre-folding device performs the first bending of the bonding section of the battery in the direction close to the body, and then the battery is transferred to the fine folding station through the transfer device, and then the battery body is clamped by the clamping device to make the battery pass through the through hole. In this process, the bonding section is squeezed and bent by the hole wall of the through hole, and the folding process of the bonding section is completed; wherein, the bonding section is first bent by the pre-folding device to reduce the deformation amount of the bonding section when passing through the through hole, and then the bonding section is squeezed by the hole wall of the through hole to perform the second bending in the direction close to the battery body, so as to avoid the bonding section from rebounding due to the excessive folding angle during the final bending; at the same time, the aperture size of the through hole does not need to consider the size error when the upper and lower molds are closed, and can better fit the battery body, so that the bonding section is closer to the battery body, thereby improving the production quality of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of battery folding, and in particular to a battery folding device and battery processing equipment. Background Art

[0002] Batteries are divided into three types: aluminum shell batteries, soft-packed round button lithium batteries (referred to as "button batteries"), and cylindrical batteries. Usually, mobile phone batteries use aluminum shell batteries, Bluetooth and other digital products mostly use soft-pack batteries, and laptop batteries use a series-parallel combination of cylindrical batteries.

[0003] Among them, the soft pack of the soft pack battery provides a buffer space for the battery cell to avoid explosion, and has the characteristics of light weight, high energy density and recyclability. The commonly used soft pack battery has simple folding, and the folding process can be completed by folding the two sides 90 degrees.

[0004] However, if Figure 1 As shown, the folding edge of the button battery is very complicated, and its tab needs to be folded into two sections, namely a fitting section and an extension section, wherein the fitting section needs to be close to the circular body of the button battery.

[0005] In the prior art, manual bending is usually used to fold button batteries. Later, in order to increase production efficiency, automated equipment was used to fold button batteries.

[0006] The automated equipment in the prior art mainly folds the button battery by means of mold pressing, that is, a cavity is formed by pressing the upper and lower molds, so that the tabs of the button battery are squeezed by the mold to undergo plastic deformation, and finally the tab folding process is completed; however, since the fitting section is required to fit tightly against the circular body of the button battery, the fitting section needs to be bent at least 90 degrees by the upper and lower molds, but because the fitting section extends from the circular body of the button battery, large-angle bending is difficult, resulting in easy rebound; and due to the dimensional error between the upper and lower molds, the cavity cannot fit the battery body, so that the fitting section of the finished button battery cannot fit the battery body, thereby reducing the production quality of the button battery. Summary of the invention

[0007] The object of the present invention is to provide a battery folding device and a battery processing equipment to solve the problem that the quality of button batteries is low after the existing equipment performs a folding process on button batteries.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] A battery folding device, comprising a pre-folding device, a fine folding device and a transfer device for transferring batteries from a pre-folding station of the pre-folding device to a fine folding station of the fine folding device;

[0010] The battery comprises a battery body and a tab, wherein the tab comprises a bonding section connected to the battery body; the pre-folding device is used to perform a first fold on the bonding section in a direction close to the battery body;

[0011] The fine folding device comprises a folding die and a clamping device for clamping the battery body; the folding die is provided with a through hole;

[0012] The clamping device is also used to drive the battery body to move from one end of the through hole to the other end of the through hole; during the process of the battery body being driven to move, the bonding section is squeezed by the hole wall of the through hole and is bent a second time in the direction close to the battery body.

[0013] Optionally, the clamping device includes an upper ejector device and a lower ejector device; the folding mold is arranged between the upper ejector device and the lower ejector device;

[0014] The upper push rod device is provided with an upper push rod at a position corresponding to the through hole, and the lower push rod device is provided with a lower push rod at a position corresponding to the through hole; both the upper push rod and the lower push rod can be extended into the through hole; the facing ends of the upper push rod and the lower push rod can be driven to move closer to each other for clamping the battery body.

[0015] Optionally, the upper ejector device further comprises an upper ejector drive motor; the rotor of the upper ejector drive motor is fixedly connected to a first ball screw via a coupling; the first ball screw is threadedly connected to a first screw nut; the first screw nut is fixedly connected to the upper ejector;

[0016] The lower ejector device also includes a lower ejector drive motor; the rotor of the lower ejector drive motor is fixedly connected to a second ball screw via a coupling; the second ball screw is threadedly connected to a second screw nut; and the second screw nut is fixedly connected to the lower ejector.

[0017] Optionally, a guiding slope is formed on the edge of the through hole close to one end of the upper push rod.

[0018] Optionally, the tab further includes an extension section integrally formed with the fitting section;

[0019] The pre-folding device is also used to initially bend the extension section in a direction opposite to the first bending direction of the bonding section;

[0020] The pre-folding device comprises an upper die device, a lower die device and a pre-folding base;

[0021] The upper mold device comprises an upper mold and an upper mold driving device; the upper mold is slidably connected to the pre-folding base, the upper mold driving device is installed on the pre-folding base, and the movable end of the upper mold driving device is fixedly connected to the upper mold;

[0022] The lower die device comprises a pre-folding fixture, a lower die and a lower die driving device; the pre-folding fixture is fixedly connected to the pre-folding base, and a fixture cavity penetrating the pre-folding fixture is provided in the pre-folding fixture; the lower die is accommodated in the fixture cavity;

[0023] The lower die driving device is installed on the pre-folding base, and the movable end of the lower die driving device is fixedly connected to the lower die;

[0024] The upper mold and the lower mold can be driven to move closer to each other, so as to perform a first bending on the fitting section in a direction close to the battery body and to perform an initial bending on the extension section in a direction opposite to the first bending direction.

[0025] Optionally, the upper mold includes an upper mold core and an upper pole ear mold core, and both the upper mold core and the upper pole ear mold core are fixedly connected to the movable end of the upper mold driving device;

[0026] The upper tab mold core is provided with an upper tab through hole, and one end of the upper mold core passes through the upper tab through hole to fix the battery body; the upper mold core can be driven to press the battery body onto the lower mold core;

[0027] The lower mold includes a lower mold core and a lower pole ear mold core, and the lower mold core is fixedly connected to the pre-folding fixture; the lower pole ear mold core can be movably mounted outside the lower mold core, and can be pushed by the lower mold driving device in the direction close to the upper pole ear mold core, so as to press the extension section toward the upper pole ear mold core to perform initial bending on the extension section.

[0028] Optionally, during the process of the battery body being driven to move, the extension section is squeezed by the hole wall of the through hole and is bent back in the direction of the first bending;

[0029] A lever device is provided at the bottom of the folding mold, and the lever device includes a lever that can be translated;

[0030] After the battery body moves to the other end of the through hole, the lever is located at the top of the battery body; the circulation device clamps the battery body to drive the battery body to move relative to the lever, and finally bends the extension section in a direction opposite to the direction of the first bend.

[0031] Optionally, the lever device comprises a lever cylinder mounted on the folding die; the telescopic end of the lever cylinder is fixedly connected to the lever;

[0032] After the battery body moves to the other end of the through hole, the telescopic end of the lever cylinder extends out, and the lever is located at the top of the battery.

[0033] Optionally, a heating unit for heating the battery is provided in the folding mold.

[0034] A battery processing device comprises a downstream device and the battery folding device as described above; the circulation device of the battery folding device is used to transport the folded batteries to the downstream device.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The battery folding device and battery processing equipment provided by the present invention, when the battery is folded, the pre-folding device performs the first bending of the bonding section of the battery in the direction close to the body, and then the battery is transferred to the fine folding station through the transfer device, and then the battery body is clamped by the clamping device to allow the battery to pass through the through hole. In this process, the bonding section is squeezed and bent by the hole wall of the through hole, and the folding process of the bonding section is completed; wherein, the bonding section is first bent by the pre-folding device to reduce the deformation of the bonding section when passing through the through hole, and then the bonding section is squeezed by the hole wall of the through hole to perform the second bending in the direction close to the battery body, so as to avoid the bonding section from rebounding due to the excessively large folding angle during the final bending; at the same time, the aperture size of the through hole does not need to consider the dimensional error when the upper and lower molds are closed, so that the bonding section is closer to the battery body, thereby improving the production quality of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0039] Figure 1 A schematic diagram of the folded edge of a battery tab in the background art;

[0040] Figure 2 Schematic diagram of the overall structure of the pre-folding device of the first embodiment of the present invention;

[0041] Figure 3 It is a schematic diagram of a 1 / 4 cross-sectional structure of a pre-folding device according to Embodiment 1 of the present invention;

[0042] Figure 4 Schematic diagram of the overall structure of the fine folding device of the first embodiment of the present invention;

[0043] Figure 5 for Figure 4 A schematic diagram of the local enlarged structure at A;

[0044] Figure 6 It is a partial structural schematic diagram of the fine folding device of the first embodiment of the present invention;

[0045] Figure 7 This is a schematic diagram of the folding process of the battery in the first embodiment of the present invention;

[0046] Figure 8 Schematic diagram of changes in the bonding section of the battery in the first embodiment of the present invention;

[0047] Fig. 9 It is a schematic diagram of the bent extension section of the lever in the first embodiment of the present invention.

[0048] Illustrations: 1. Pre-folding device; 11. Upper die device; 111. Upper die; 1111. Upper die core; 1112. Upper ear die core; 112. Upper die driving device;

[0049] 12. Lower die device; 121. Pre-folding fixture; 122. Lower die; 1221. Lower die core; 1222. Lower ear die core; 1223. Lower top block; 1224. Return spring; 123. Lower die driving device;

[0050] 13. Pre-folded base;

[0051] 2. Fine folding device; 21. Folding die; 211. Through hole; 212. Guide slope;

[0052] 22. Clamping device; 221. Upper ejector device; 2211. Upper ejector; 222. Lower ejector device; 2221. Lower ejector;

[0053] 23. lever device; 231. lever; 232. lever cylinder;

[0054] 3. Battery; 31. Battery body; 32. Laminating section; 33. Extension section. DETAILED DESCRIPTION

[0055] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] In the description of the present invention, it should be understood that the terms "upper", "lower", "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 a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0057] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0058] Please refer to Figures 1 to 9 , Figure 1 Schematic diagram of the folding edge of the battery tab in the background technology, Figure 2 Schematic diagram of the overall structure of the pre-folding device of the first embodiment of the present invention, Figure 3 1 / 4 cross-sectional structural diagram of the pre-folding device of the first embodiment of the present invention, Figure 4 Schematic diagram of the overall structure of the fine folding device of the first embodiment of the present invention, Figure 5 for Figure 4 A local enlarged structural diagram at A. Figure 6 Schematic diagram of the partial structure of the fine folding device of the first embodiment of the present invention, Figure 7 Schematic diagram of the folding process of the battery in the first embodiment of the present invention, Figure 8 Schematic diagram of the changes of the bonding section of the battery in the first embodiment of the present invention, Fig. 9 It is a schematic diagram of the bent extension section of the lever in the first embodiment of the present invention.

[0059] Embodiment 1

[0060] The battery folding device provided in the embodiment of the present invention is mainly used in the scenario of folding button batteries (i.e., "soft-packaged round button lithium batteries"), and the production quality of button batteries is improved by performing secondary folding on the tabs of the button batteries.

[0061] The battery folding device provided in this embodiment includes a pre-folding device 1, a fine folding device 2 and a transfer device for transferring the battery from the pre-folding station of the pre-folding device 1 to the fine folding station of the fine folding device 2.

[0062] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the battery 3 includes a battery body 31 and a tab, and the tab includes a bonding section 32 connected to the battery body 31 ; the pre-folding device 1 is used to perform a first bend on the bonding section 32 in a direction close to the battery body 31 .

[0063] The fine folding device 2 comprises a folding die 21 and a clamping device 22 for clamping the battery body 31 ; a through hole 211 is formed in the folding die 21 .

[0064] The clamping device 22 is also used to drive the battery body 31 to move from one end of the through hole 211 to the other end of the through hole 211; when the battery body 31 is driven to move, the fitting section 32 is squeezed by the hole wall of the through hole 211 and is bent a second time in the direction close to the battery body 31. The circulation device may be a multi-axis manipulator with a battery clamp installed at the end of the manipulator, or a turntable driven by a motor with battery clamps with multiple degrees of freedom installed at the edge of the turntable.

[0065] Specifically, when the battery 3 is subjected to the folding process, the pre-folding device 1 performs the first folding of the bonding section 32 of the battery 3 in the direction close to the battery body 31, and then the battery 3 is transferred to the fine folding station through the transfer device, and then the battery body 31 is clamped by the clamping device 22 to allow the battery 3 to pass through the through hole 211. In this process, the bonding section 32 is squeezed and bent by the hole wall of the through hole 211, and the folding process of the bonding section 32 is completed; wherein, the bonding section 32 is first bent by the pre-folding device 1, reducing the bonding section 3 2 when passing through the through hole 211, and then the fitting section 32 is squeezed by the hole wall of the through hole 211 to be bent for the second time in the direction close to the battery body 31, so as to avoid the springback phenomenon of the fitting section 32 due to the excessive folding angle during the final bending; at the same time, the aperture size of the through hole 211 does not need to consider the size error when the upper and lower molds are closed, so that the fitting section 32 is closer to the battery body 31, and the production quality of the battery 3 is improved; at the same time, there is no need to manually fold the edges, which improves the safety factor, ensures the production efficiency, and reduces the labor cost.

[0066] Furthermore, if Figure 4 As shown, the clamping device 22 includes an upper ejector device 221 and a lower ejector device 222; the folding mold 21 is arranged between the upper ejector device 221 and the lower ejector device 222;

[0067] An upper push rod 2211 is provided at a position of the upper push rod device 221 corresponding to the through hole 211, and a lower push rod 2221 is provided at a position of the lower push rod device 222 corresponding to the through hole 211; both the upper push rod 2211 and the lower push rod 2221 can be extended into the through hole 211; the facing ends of the upper push rod 2211 and the lower push rod 2221 can be driven to move closer to each other for clamping the battery body 31.

[0068] For example, Figure 8 As shown, the fine folding device 2 can bend the bonding section 32 in the direction close to the battery body 31; when the battery 3 is finely folded, the transfer device clamps the battery 3 from the pre-folding station to the fine folding station, that is, Figure 5 As shown, the battery is placed above the through hole 211, and the end of the lower push rod 2221 is located in the through hole 211 to support the battery body 31; then, the upper push rod 2211 is pressed down, and the upper push rod 2211 cooperates with the lower push rod 2221 to press the battery body 31; then, the upper push rod 2211 and the lower push rod 2221 are synchronously lowered, so that the battery 3 passes through the through hole 211, so that the fitting section 32 is pressed straight by the hole wall of the through hole 211, and the fitting section 32 has completed the folding; it should be supplemented that if the fitting section 32 is provided with an extension section 33 extending in a direction away from the battery body 31, the extension section is processed by the circulation device and the lever device 23.

[0069] Specifically, when the battery body 31 is driven to move, the extension section 33 is squeezed by the hole wall of the through hole 211 and is bent back to the direction of the first bending.

[0070] A lever device 23 is provided at the bottom of the folding mold 21 , and the lever device 23 includes a lever 231 that can be translated.

[0071] After the battery body 31 moves to the other end of the through hole 211, the lever 231 is located at the top of the battery body 31; the circulation device clamps the battery body 31 to drive the battery body 31 to move relative to the lever 231, and finally bends the extension section 33 in the direction opposite to the first bending direction.

[0072] For example, Fig. 9 As shown, the circulation device clamps the battery body 31, the upper push rod 2211 is reset, the lever 231 extends to the top of the battery, and the circulation device drives the battery body 31 to move relative to the lever 231, so that the extension section 33 is flattened again. The deformation process of the tab is as shown in FIG. Figure 7 As shown, a qualified battery is finally obtained.

[0073] Specifically, the upper ejector device 221 also includes an upper ejector drive motor; the rotor of the upper ejector drive motor is fixedly connected to a first ball screw through a coupling; the first ball screw is threadedly connected to a first screw nut; the first screw nut is fixedly connected to the upper ejector 2211;

[0074] The lower ejector rod device 222 also includes a lower ejector rod driving motor; the rotor of the lower ejector rod driving motor is fixedly connected to a second ball screw through a coupling; the second ball screw is threadedly connected to a second screw nut; the second screw nut is fixedly connected to the lower ejector rod 2221. It should be added that both the upper ejector rod 2211 and the lower ejector rod 2221 are connected to pressure sensors, which can control the pressure of clamping the battery body 31 to prevent the battery 5 from being crushed during the folding process and ensure the yield rate; both the upper ejector rod device 221 and the lower ejector rod device 222 are provided with guide rods, which can ensure the position accuracy between the upper ejector rod 2211 and the through hole 211 and the position accuracy between the lower ejector rod 2221 and the through hole, thereby improving the overall accuracy.

[0075] Furthermore, a guiding inclined surface 212 is formed on the edge of the through hole 211 close to one end of the upper push rod 2211 .

[0076] Specifically, the pre-folding device 1 is also used to initially bend the extension section 33 in a direction opposite to the first bending direction of the bonding section 32;

[0077] The pre-folding device 1 comprises an upper die device 11, a lower die device 12 and a pre-folding base 13;

[0078] The upper mold device 11 includes an upper mold 111 and an upper mold driving device 112; the upper mold 111 is slidably connected to the pre-folding base 13, the upper mold driving device 112 is installed on the pre-folding base 13, and the movable end of the upper mold driving device 112 is fixedly connected to the upper mold 111;

[0079] The lower die device 12 includes a pre-folding fixture 121, a lower die 122 and a lower die driving device 123; the pre-folding fixture 121 is fixedly connected to the pre-folding base 13, and a fixture cavity penetrating the pre-folding fixture 121 is provided in the pre-folding fixture 121; the lower die 122 is accommodated in the fixture cavity;

[0080] The lower die driving device 123 is installed on the pre-folding base 13, and the movable end of the lower die driving device 123 is fixedly connected to the lower die 122;

[0081] The upper mold 111 and the lower mold 122 can be driven to move closer to each other, so as to perform a first bending on the fitting section 32 toward the direction close to the battery body 31 and to perform an initial bending on the extension section 33 in a direction opposite to the first bending direction.

[0082] Exemplarily, when pre-folding the battery 3, the circulation device places the battery 3 into the fixture cavity, and the battery body 31 is supported on the lower mold 122; then the upper mold 111 is pressed down to cooperate with the lower mold 122 to fix the battery body 31, and then the lower mold 122 is closed on the part corresponding to the pole ear, so that the fitting section 32 and the extension section 33 are plastically deformed relative to the battery body 31, that is, the pole ear is pre-folded.

[0083] Furthermore, if Figure 2 and Figure 3 As shown, the upper mold 111 includes an upper mold core 1111 and an upper pole ear mold core 1112 , and the upper mold core 1111 and the upper pole ear mold core 1112 are both fixedly connected to the movable end of the upper mold driving device 112 .

[0084] The upper tab mold core 1112 is provided with an upper tab through hole, and one end of the upper mold core 1111 passes through the upper tab through hole to fix the battery body 31 ; the upper mold core 1111 can be driven to press the battery body 31 onto the lower mold core 1221 .

[0085] The lower mold 122 includes a lower mold core 1221 and a lower pole ear mold core 1222. The lower mold core 1221 is fixedly connected to the pre-folding fixture 121; the lower pole ear mold core 1222 can be movably mounted outside the lower mold core 1221, and can be pushed by the lower mold driving device 123 in the direction close to the upper pole ear mold core 1112, so as to press the extension section 33 toward the upper pole ear mold core 1112 to perform initial bending on the extension section 33.

[0086] When the upper mold driving device 112 drives the upper mold 111 to press downward, the upper mold core 1111 and the lower mold core 1221 are used to fix the battery body 31 .

[0087] When the lower mold driving device 123 drives the lower tab mold core 1222 to close, the lower tab mold core 1222 moves toward the upper tab mold core 1112 , so that the tab is pre-bent.

[0088] Furthermore, if Figure 3 As shown, a lower pressure block 1223 is fixedly connected to the bottom of the lower pole ear mold core 1222; a return spring 1224 is arranged between the lower pressure block 1223 and the pre-folding base 13; one end of the return spring 1224 abuts against the lower pressure block 1223, and the other end of the return spring 1224 abuts against the pre-folding base 13.

[0089] Specifically, the upper mold driving device 112 includes an upper mold driving motor; the rotor of the upper mold driving motor is fixedly connected to a first ball screw through a coupling; the first ball screw is threadedly connected to a first screw nut; and the first screw nut is fixedly connected to the upper mold 111.

[0090] The lower die driving device 123 includes a lower die driving cylinder; a push rod for pushing the lower die 122 is fixedly connected to the telescopic section of the lower die driving cylinder.

[0091] Specifically, Figure 6 As shown, the lever device 23 includes a lever cylinder 232 installed on the folding mold 21; the telescopic end of the lever cylinder 232 is fixedly connected to the lever 231;

[0092] After the battery body 31 moves to the other end of the through hole 211 , the telescopic end of the lever cylinder 232 extends out, and the lever 231 is located at the top of the battery 3 .

[0093] Furthermore, a heating unit for heating the battery 3 is provided in the folding mold 21; when the battery 3 passes through the through hole 211, the heating unit heats the tab to improve the folding effect.

[0094] To sum up, the battery folding device provided in this embodiment performs secondary folding on the battery tabs so that the battery tabs after the folding process are more closely attached to the circular body of the button battery, thereby improving the production quality of the button battery and having the characteristics of high efficiency, high precision, high safety factor and low cost.

[0095] Embodiment 2

[0096] This embodiment provides a battery processing device, including downstream equipment and a battery folding device as in the first embodiment; the circulation device of the battery folding device is used to transport the folded batteries to the downstream equipment. The first embodiment describes the specific structure and technical effects of the battery folding device, and this embodiment refers to the battery folding device and also has its technical effects.

[0097] To sum up, the battery processing equipment provided in this embodiment performs secondary folding on the battery tabs so that the battery tabs after the folding process are more closely attached to the circular body of the button battery, thereby improving the production quality of the button battery and having the characteristics of high efficiency, high precision, high safety factor and low cost.

[0098] As described above, the above embodiments 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 thereof may be replaced by equivalents. However, these 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.

Claims

1. A battery folding device, characterized in that: It comprises a pre-folding device (1), a fine folding device (2), and a transfer device for transferring batteries (3) from the pre-folding station of the pre-folding device (1) to the fine folding station of the fine folding device (2); The battery (3) comprises a battery body (31) and a tab, wherein the tab comprises a bonding section (32) connected to the battery body (31); the pre-folding device (1) is used to perform a first fold on the bonding section (32) in a direction close to the battery body (31); The fine folding device (2) comprises a folding die (21) and a clamping device (22) for clamping the battery body (31); a through hole (211) is provided on the folding die (21); The clamping device (22) is also used to drive the battery body (31) to move from one end of the through hole (211) to the other end of the through hole (211); when the battery body (31) is driven to move, the fitting section (32) is squeezed by the hole wall of the through hole (211) and is bent a second time in a direction close to the battery body (31); The pole ear also includes an extension section (33) integrally formed with the bonding section (32); the pre-folding device (1) is also used to perform an initial bending on the extension section (33) in a direction opposite to the first bending direction of the bonding section (32); the pre-folding device (1) includes an upper mold device (11), a lower mold device (12) and a pre-folding base (13); the upper mold device (11) includes an upper mold (111) and an upper mold driving device (112); the upper mold (111) is slidably connected to the pre-folding base (13), the upper mold driving device (112) is installed on the pre-folding base (13), and the movable end of the upper mold driving device (112) is fixedly connected to the upper mold (111); the lower mold device (12) includes a pre-folding clamp (121), a lower mold The invention relates to a mold (122) and a lower mold driving device (123); the pre-folding clamp (121) is fixedly connected to the pre-folding base (13), and a clamp cavity penetrating the pre-folding clamp (121) is provided in the pre-folding clamp (121); the lower mold (122) is accommodated in the clamp cavity; the lower mold driving device (123) is installed on the pre-folding base (13), and the movable end of the lower mold driving device (123) is fixedly connected to the lower mold (122); the upper mold (111) and the lower mold (122) can be driven to move closer to each other, so as to perform a first bending on the bonding section (32) in a direction close to the battery body (31) and to perform an initial bending on the extension section (33) in a direction opposite to the direction of the first bending; The upper mold (111) comprises an upper mold core (1111) and an upper pole ear mold core (1112), and the upper mold core (1111) and the upper pole ear mold core (1112) are both fixedly connected to the movable end of the upper mold driving device (112); the upper pole ear mold core (1112) is provided with an upper pole ear through hole, and one end of the upper mold core (1111) passes through the upper pole ear through hole to fix the battery body (31); The lower mold (122) comprises a lower mold core (1221) and a lower pole ear mold core (1222), and the lower mold core (1221) is fixedly connected to the pre-folding fixture (121); the lower pole ear mold core (1222) can be movably sleeved outside the lower mold core (1221), and can be pushed by the lower mold driving device (123) in a direction close to the upper pole ear mold core (1112), so as to press the extension section (33) toward the upper pole ear mold core (1112) to perform initial bending on the extension section (33); The upper mold core (1111) can be driven to press the battery body (31) onto the lower mold core (1221).

2. The battery folding device according to claim 1, characterized in that: The clamping device (22) comprises an upper push rod device (221) and a lower push rod device (222); the folding mold (21) is arranged between the upper push rod device (221) and the lower push rod device (222); The upper push rod device (221) is provided with an upper push rod (2211) at a position corresponding to the through hole (211), and the lower push rod device (222) is provided with a lower push rod (2221) at a position corresponding to the through hole (211); both the upper push rod (2211) and the lower push rod (2221) can extend into the through hole (211); and the facing ends of the upper push rod (2211) and the lower push rod (2221) can be driven to move closer to each other, so as to clamp the battery body (31).

3. The battery folding device according to claim 2, characterized in that: The upper ejector rod device (221) further comprises an upper ejector rod driving motor; the rotor of the upper ejector rod driving motor is fixedly connected to a first ball screw via a coupling; the first ball screw is threadedly connected to a first screw nut; the first screw nut is fixedly connected to the upper ejector rod (2211); The lower push rod device (222) also includes a lower push rod driving motor; the rotor of the lower push rod driving motor is fixedly connected to a second ball screw via a coupling; the second ball screw is threadedly connected to a second screw nut; the second screw nut is fixedly connected to the lower push rod (2221).

4. The battery folding device according to claim 2, characterized in that: A guiding inclined surface (212) is formed on the edge of the through hole (211) close to one end of the upper push rod (2211).

5. The battery folding device according to claim 1, characterized in that: When the battery body (31) is driven to move, the extension section (33) is squeezed by the hole wall of the through hole (211) and is bent back in the direction of the first bending; A lever device (23) is provided at the bottom of the folding mold (21), and the lever device (23) comprises a lever (231) capable of translation; After the battery body (31) moves to the other end of the through hole (211), the lever (231) is located at the top of the battery body (31); the circulation device clamps the battery body (31) and is used to drive the battery body (31) to move relative to the lever (231) to perform a final bend on the extension section (33) in a direction opposite to the direction of the first bend.

6. The battery folding device according to claim 5, characterized in that: The lever device (23) comprises a lever cylinder (232) mounted on the folding die (21); the telescopic end of the lever cylinder (232) is fixedly connected to the lever (231); After the battery body (31) moves to the other end of the through hole (211), the telescopic end of the lever cylinder (232) extends out, and the lever (231) is located at the top of the battery (3).

7. The battery folding device according to claim 1, characterized in that: A heating unit for heating the battery (3) is arranged inside the folding mold (21).

8. A battery processing device, characterized in that: It comprises downstream equipment and a battery folding device as described in any one of claims 1 to 7; the circulation device of the battery folding device is used to transport the folded batteries to the downstream equipment.

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