A high-efficiency stretching die for lithium battery shell

Abstract

The present invention relates to the field of mold technology, specifically to an efficient stretching mold for a lithium battery shell, comprising two plates and two cutting wires, and also comprising a calibration pressure-bearing mechanism, a shaping mechanism arranged in the calibration pressure-bearing mechanism, a continuous molding mechanism arranged in the calibration pressure-bearing mechanism, and a traction stamping mechanism arranged on the continuous molding mechanism; the continuous molding mechanism comprises an opening and closing assembly, an upper module arranged directly above the opening and closing assembly, and a lower module arranged directly below the opening and closing assembly. By setting the traditional gradually stretched multi-mold structure as an upper cover mold and a lower cover mold of an assembled structure, the plate can be delivered to the gap between the closed rear mold cover and the two modules without pre-cutting the plate, and finally, under the pressure of the two modules, the two plates can be quickly shaped and stretched, thereby improving the efficiency of continuous stretching and shaping of the plate while saving the cost of pre-cutting plate equipment.

Description

Technical Field

[0001] The invention relates to the technical field of molds, and in particular to a high-efficiency stretching mold for a lithium battery shell. Background Art

[0002] Lithium battery shells are mainly made of steel, aluminum, and aluminum-plastic films, and different materials have different protective effects on lithium batteries of different shapes. In order to adapt to the packaging of lithium batteries of different shapes, the processing of special-shaped lithium battery shells requires the use of specific stretching molds.

[0003] Since the stretching of lithium battery shells is a continuous processing process that requires the use of multiple devices in coordination, the stretching of traditional lithium battery shells requires the use of cutting equipment to cut the sheet into the shape to be stamped and stretched in advance, and the use of transfer equipment to transfer the cut sheet to the stretching die until the sheet is gradually stamped and stretched to a perfect structure. However, this process has disadvantages. When the cut sheet is stretched through the die, the edge of the sheet is subjected to the lowest force, which will cause bumps on the edge of the battery shell. At the same time, the stretching of the cut sheet is carried out in coordination with multiple devices, which will increase the difficulty of calibration and increase cost losses.

[0004] In view of this, a high-efficiency stretching die for lithium battery shells was designed to solve the above problems. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0006] To this end, the technical solution adopted in the present invention is:

[0007] A high-efficiency stretching die for a lithium battery shell, comprising two plates and two cutting wires, and also comprising a calibration pressure-bearing mechanism, a shaping mechanism arranged in the calibration pressure-bearing mechanism, a continuous molding mechanism arranged in the calibration pressure-bearing mechanism, and a traction and stamping mechanism arranged on the continuous molding mechanism; the continuous molding mechanism comprises an opening and closing assembly, an upper module arranged directly above the opening and closing assembly, and a lower module arranged directly below the opening and closing assembly, and the upper module and the lower module are used to stretch the upper shell and the lower shell of the battery for the two plates; the shaping mechanism comprises two upper cover molds for adapting to the upper module and stretching one of the plates, and two lower cover molds for adapting to the lower module and stretching the other plate; the calibration pressure-bearing mechanism comprises a pressure-resistant base supporting the opening and closing assembly, and four calibration ends are arranged in the pressure-resistant base; two adjacent calibration ends are used to guide the uniform speed delivery of the plates and cooperate with the cutting wire to provide a calibration platform for cutting the stretched shell.

[0008] In a preferred example, the present invention can be further configured as follows: the calibration pressure-bearing mechanism further includes a crossbeam, the pressure-resistant base is arranged outside the crossbeam, four bases are installed inside the pressure-resistant base, a slide groove is provided inside the base, a cover is installed on the base, and a spring is arranged in the slide groove;

[0009] A clamping seat is arranged outside the compression-resistant base, and a horizontally placed hydraulic component is arranged inside the clamping seat;

[0010] The four bases are used to provide a pressure-bearing platform for providing a stable slideway for the two upper cover molds and the two lower cover molds.

[0011] In a preferred example, the present invention can be further configured as follows: the traction and stamping mechanism includes a unified beam, a pull rod is provided on the unified beam, and a truss is installed at the other end of the pull rod;

[0012] A pad is installed between two adjacent trusses, and the pad is used to provide constant pressure kinetic energy for the upper module and the lower module to rise and fall at the same speed;

[0013] The unified beam is connected to an external hydraulic component and is used to provide a linkage platform for multiple groups of evenly distributed upper modules and lower modules.

[0014] In a preferred example, the present invention can be further configured as follows: the opening and closing assembly includes a pressure-bearing member, the pressure-bearing member is composed of a T-shaped end column and a rectangular sleeve, and a first sleeve and a second sleeve are arranged in the rectangular sleeve;

[0015] The length of the second sleeve is twice that of the first sleeve, and compression springs are disposed in the inner cavities of the first sleeve and the second sleeve;

[0016] A first core column is movably installed in the first sleeve, and a second core column is movably installed in the second sleeve. The first core column and the second core column are both provided with cross-shaped ends, and the two cross-shaped ends are both provided with clamping plates;

[0017] The length of the second core column is twice the length of the first core column.

[0018] In a preferred example, the present invention can be further configured as follows: the continuous molding mechanism further includes an extrusion assembly, and the extrusion assembly is used to provide a constant pressure driving force for the first core column and the second core column;

[0019] The extrusion assembly comprises a booster sleeve arranged in the backing plate, a locking nut is arranged on the threaded section of the booster sleeve, and a through hole is opened inside the booster sleeve;

[0020] The two clamps at the inner end of the booster sleeve are respectively connected with a first oblique frame and a second oblique frame, and the other end of the first oblique frame is movably mounted on one of the clamping plates, while the other end of the second oblique frame is movably mounted on the other clamping plate.

[0021] In a preferred example, the present invention can be further configured as follows: two clamps are provided on the outer wall of the rectangular sleeve in the pressure-bearing member, and a limit rod is movably installed in the two clamps, and the other end of the limit rod is adapted to penetrate into the through hole inside the booster sleeve;

[0022] A return sub-spring is arranged outside the limit rod, and the return sub-spring is used to provide a return thrust for the booster sleeve;

[0023] The length of the second oblique frame is twice the length of the first oblique frame.

[0024] In a preferred example, the present invention can be further configured as follows: the shaping mechanism further includes an end head arranged on the hydraulic sub-rod in the hydraulic component and two traction arms movably mounted on the end head, and the other end of the traction arm is movably mounted with a suspension;

[0025] The upper cover mold is arranged on the end plate at the top of the suspension, and the lower cover mold is arranged on the end plate at the bottom of the suspension.

[0026] In a preferred example, the present invention can be further configured as follows: sliders are provided at the top and bottom ends of the suspension, wherein the top slider is movably installed in a top base, and the bottom slider is movably installed in a bottom base.

[0027] In a preferred example, the present invention can be further configured as follows: the compression-resistant base, the base, the clamping base and the four calibration ends are all made of stainless steel;

[0028] Two groups of clamping plates are installed at the bottom of the clamping seat, and the hydraulic components are installed in the two groups of clamping plates.

[0029] In a preferred example, the present invention can be further configured as follows: an elliptical insertion hole is provided inside the calibration end head, and a flat transverse groove is provided in the middle of the calibration end head, and the flat transverse groove is used to guide the stable delivery of the plate;

[0030] One of the cutting wires is arranged on the top surface of a plate placed on the top, and the other cutting wire is arranged on the bottom surface of another plate placed on the bottom.

[0031] By adopting the above technical solution, the beneficial effects achieved by the present invention are:

[0032] 1. The present invention sets the traditional gradual stretching multi-mold structure as an upper cover mold and a lower cover mold of an assembled structure, and delivers the plate to the closed rear mold cover and the gap between the two modules without pre-cutting the plate. Finally, under the pressure of the two modules, the two plates can be quickly shaped and stretched, thereby improving the efficiency of continuous stretching and shaping of the plate while saving the cost of pre-cutting plate equipment.

[0033] 2. The present invention sets two upper cover molds and two lower cover molds that can stretch freely. After the two plates are stretched as mentioned above until they are continuously shaped, as the external delivery equipment transports the two plates at a uniform speed, the parts of the plates that are stretched into shells can be quickly cut off by two cutting lines. At this time, the battery upper shell and battery lower shell formed by stretching the two plates can ensure the neatness of the ports, thereby avoiding the disadvantage of uneven ports caused by traditional cutting and stretching of plates.

[0034] 3. The present invention utilizes the mold mechanism to replace the continuous operation of traditional multiple devices, and increases the number of molds according to production needs. At this time, the array-arranged molds do not require the tedious calibration and maintenance of traditional multiple devices, and can stretch the lithium battery shell with the minimum footprint and minimum cost, thereby effectively saving cost losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the principle of battery shell delivery of the present invention;

[0036] Figure 2 It is a three-dimensional schematic diagram of the present invention;

[0037] Figure 3 A schematic diagram of a pressure-bearing mechanism for calibration of the present invention;

[0038] Figure 4 For the present invention Figure 3 The enlarged schematic diagram of point A in the middle;

[0039] Figure 5 It is an exploded schematic diagram of the shaping mechanism of the present invention;

[0040] Figure 6 It is a schematic diagram of the traction punching mechanism of the present invention;

[0041] Figure 7 For the present invention Figure 6 The enlarged schematic diagram of point B in the middle;

[0042] Figure 8 It is a cross-sectional schematic diagram of two modules of the present invention;

[0043] Fig. 9 It is an exploded schematic diagram of the opening and closing assembly and the extrusion assembly of the present invention.

[0044] Reference numerals:

[0045] 100. Plates;

[0046] 200, traction and stamping mechanism; 210, integrated beam; 220, tie rod; 230, truss; 240, pad;

[0047] 300, continuous molding mechanism; 310, upper module; 320, lower module; 330, opening and closing assembly; 331, pressure-bearing member; 332, first sleeve; 333, second sleeve; 334, compression spring; 335, first core column; 336, second core column; 337, clamp; 340, extrusion assembly; 341, clamp; 342, limit rod; 343, reset subspring; 344, booster sleeve; 345, first oblique frame; 346, second oblique frame;

[0048] 400, shaping mechanism; 410, end; 420, traction arm; 430, suspension; 440, slider; 450, upper cover mold; 460, lower cover mold;

[0049] 500, calibration pressure-bearing mechanism; 510, pressure-resistant base; 520, crossbeam; 530, base; 540, cover; 550, spring; 560, clamping seat; 570, hydraulic component; 580, calibration end;

[0050] 600, cutting wire. DETAILED DESCRIPTION

[0051] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0052] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0053] A high-efficiency stretching die for a lithium battery shell provided by some embodiments of the present invention is described below in conjunction with the accompanying drawings.

[0054] Embodiment 1:

[0055] Combination Figure 1-Figure 9 As shown, the present invention provides a high-efficiency stretching die for a lithium battery shell, comprising two plates 100 and two cutting wires 600, and also comprising a calibration pressure-bearing mechanism 500, a shaping mechanism 400 arranged in the calibration pressure-bearing mechanism 500, a continuous molding mechanism 300 arranged in the calibration pressure-bearing mechanism 500, and a traction and stamping mechanism 200 arranged on the continuous molding mechanism 300, wherein the traction and stamping mechanism 200 is used to provide driving kinetic energy for multiple groups of evenly distributed continuous molding mechanisms 300, and the calibration pressure-bearing mechanism 500 is used to provide a stable platform for the shaping mechanism 400 and continuously stretch and shape the two plates 100.

[0056] The traction punching mechanism 200 includes a unified beam 210, a pull rod 220 is provided on the unified beam 210, and a truss 230 is installed at the other end of the pull rod 220;

[0057] A pad 240 is installed between two adjacent trusses 230, and the pad 240 is used to provide constant pressure kinetic energy for the upper module 310 and the lower module 320 to rise and fall at the same speed;

[0058] The integrated beam 210 is connected to an external hydraulic component and is used to provide a linkage platform for multiple groups of evenly distributed upper modules 310 and lower modules 320;

[0059] The continuous molding mechanism 300 includes an opening and closing assembly 330, an upper module 310 disposed directly above the opening and closing assembly 330, and a lower module 320 disposed directly below the opening and closing assembly 330, and the upper module 310 and the lower module 320 are used to stretch the upper shell and the lower shell of the battery for the two plates 100;

[0060] The shaping mechanism 400 includes two upper cover molds 450 for adapting to the upper mold block 310 and stretching one of the plates 100 and two lower cover molds 460 for adapting to the lower mold block 320 and stretching another plate 100;

[0061] The calibration pressure bearing mechanism 500 includes a crossbeam 520 and a pressure-resistant base 510 for supporting the opening and closing assembly 330. Four calibration terminals 580 are arranged in the pressure-resistant base 510.

[0062] The two adjacent calibration ends 580 are used to guide the uniform delivery of the plate 100 and cooperate with the cutting wire 600 to provide a calibration platform for cutting the stretched shell;

[0063] The pressure-resistant base 510 is arranged outside the crossbeam 520, and four bases 530 are installed inside the pressure-resistant base 510. A slide groove is opened inside the base 530, and a cover 540 is installed on the base 530, and a spring 550 is arranged in the slide groove;

[0064] A clamping seat 560 is disposed outside the compression-resistant base 510 , and a horizontally placed hydraulic component 570 is disposed inside the clamping seat 560 ;

[0065] The four bases 530 are used to provide a pressure-bearing platform for the two upper cover molds 450 and the two lower cover molds 460 to stabilize the slideways.

[0066] Since the stretching preparation of traditional lithium battery shells requires the use of multiple devices, the cycle from plate to shell is relatively long. This process is time-consuming and will increase the production cost of the battery shell. At the same time, this processing method requires the plate to be cut according to specifications in advance. At this time, the plate cut to the specified size needs to be delivered to the stretching mold by transfer equipment. At the same time, the stretching of this battery shell requires the coordinated use of multiple molds, so this process has many disadvantages.

[0067] The device replaces the traditional multi-device with the smallest volume. When the two plates 100 are uniformly delivered to the two sets of calibration ends 580 by the external delivery device, the two plates 100 in uniform delivery can pass through the gaps between the upper module 310, the two upper cover molds 450 and the lower module 320, the two lower cover molds 460 respectively. When the unified beam 210 is pulled by the external hydraulic parts, the multiple pull rods 220 evenly distributed on the unified beam 210 can cooperate with the multiple trusses 230 to pull the multiple pads 240 evenly distributed. At this time, the multiple sets of molds evenly distributed according to the processing requirements can be applied with constant thrust by the multiple pads 240. At this time, the multiple upper modules 310 and the multiple lower modules 320 evenly distributed can cooperate with the multiple sets of upper cover molds 450 and the multiple sets of lower cover molds 460 to continuously stamp, stretch and shape the two plates 100. At this time, the parts of the two plates 100 that are stretched and form the shell can be accurately cut by the two cutting wires 600.

[0068] At this time, the device can continuously stretch and shape the two plates 100 that do not need to be cut without complicated calibration, and the stretched shell can ensure the flatness of its port after cutting, while avoiding the wear of the traditional mold on the shell.

[0069] Embodiment 2:

[0070] Combination Figure 2-Figure 9 As shown, based on the embodiment 1, the continuous molding mechanism 300 further includes an extrusion assembly 340, and the extrusion assembly 340 is used to provide a constant pressure driving force for the first core column 335 and the second core column 336;

[0071] The opening and closing assembly 330 includes a pressure-bearing member 331 , which is composed of a T-shaped end column and a rectangular sleeve, and a first sleeve 332 and a second sleeve 333 are arranged in the rectangular sleeve.

[0072] Preferably, the length of the inner cavity of the tensioning and closing assembly 330 is also twice the length of the inner cavity of the first sleeve 332. When the first core column 335 and the second core column 336 are subjected to constant pressure thrust and stretch in the opposite direction, the upper module 310 arranged on the top of the first core column 335 and the second core column 336 arranged at the bottom of the second core column 336 can provide stamping and stretching kinetic energy to the two plates 100. At this time, the upper shell and the lower shell for lithium battery packaging can be continuously and quickly stretched and prepared.

[0073] The length of the second sleeve 333 is twice that of the first sleeve 332 , and compression springs 334 are disposed in the inner cavities of the first sleeve 332 and the second sleeve 333 ;

[0074] A first stem 335 is movably mounted in the first sleeve 332, and a second stem 336 is movably mounted in the second sleeve 333. Both the first stem 335 and the second stem 336 are provided with cross-shaped ends, and both cross-shaped ends are provided with clamping plates 337.

[0075] The length of the second core column 336 is twice the length of the first core column 335 .

[0076] Preferably, the two compression springs 334 arranged in the inner cavities of the first sleeve 332 and the second sleeve 333 will provide sufficiently strong restoring kinetic energy for the first core column 335 and the second core column 336. When the two plates 100 are stamped and stretched, the first core column 335 and the second core column 336, which have lost their force, can shrink rapidly under the action of the two compression springs 334 that have accumulated elastic potential energy. At this time, the two uniformly delivered plates 100 can be continuously stamped and stretched with minimal loss.

[0077] The extrusion assembly 340 includes a booster sleeve 344 disposed in the backing plate 240, a locking nut is disposed on the threaded section of the booster sleeve 344, and a through hole is opened inside the booster sleeve 344;

[0078] The two clamps at the inner end of the booster sleeve 344 are respectively connected to a first oblique frame 345 and a second oblique frame 346, and the other end of the first oblique frame 345 is movably mounted on one of the clamping plates 337, while the other end of the second oblique frame 346 is movably mounted on the other clamping plate 337;

[0079] Two clamps 341 are arranged on the outer wall of the rectangular sleeve in the pressure bearing member 331, and a limiting rod 342 is movably installed in the two clamps 341, and the other end of the limiting rod 342 is adapted to penetrate into the through hole in the booster sleeve 344;

[0080] A return sub-spring 343 is disposed outside the limiting rod 342, and the return sub-spring 343 is used to provide a return thrust for the booster sleeve 344;

[0081] The length of the second oblique frame 346 is twice the length of the first oblique frame 345 .

[0082] Preferably, the two clamps 341 are fixed on the outer wall of the rectangular sleeve by bolts. At this time, the limit rod 342 clamped by the two clamps 341 can provide an effective path for the lateral extension and contraction of the boost sleeve 344, and the first inclined frame 345 and the second inclined frame 346 movably installed on the two clamps at the inner end of the boost sleeve 344 can push the first core column 335 and the second core column 336 respectively. At this time, the two plates 100 to be stretched into different shell depths can be cooperated with the two upper cover molds 450 and the two lower cover molds 460 for selective stamping.

[0083] Embodiment 3:

[0084] Combination Figure 1-Figure 6 As shown, on the basis of embodiment 1, the shaping mechanism 400 further includes an end head 410 disposed on the hydraulic sub-rod in the hydraulic component 570 and two traction arms 420 movably mounted on the end head 410, and a suspension 430 is movably mounted on the other end of the traction arm 420;

[0085] The upper cover mold 450 is disposed on an end plate at the top of the suspension 430 , and the lower cover mold 460 is disposed on an end plate at the bottom of the suspension 430 .

[0086] Preferably, the end head 410 is a traction platform for two traction arms 420, and the traction method of the end head 410 can be selected according to actual usage requirements. When the two sliders 440 are constrained by the four bases 530, the two upper cover molds 450 and the two lower cover molds 460 of the assembled structure can cooperate with the upper module 310 and the lower module 320 to provide a low-wear stretching platform for the two plates 100, and the stretched and formed shell can be quickly evacuated from the separated two upper cover molds 450 and the two lower cover molds 460, and will eventually be quickly cut by two cutting wires 600, at which time the cut shell port can be kept flat.

[0087] Slide blocks 440 are disposed at the top and bottom of the suspension 430 , wherein the top slide block 440 is movably mounted in a top base 530 , and the bottom slide block 440 is movably mounted in a bottom base 530 .

[0088] Preferably, the spring 550 is used to provide slip protection for the slider 440, and the spring 550 arranged inside the base 530 is used to provide an elastic thrust for the slider 440 to reset. When the portion of the sheet 100 stretched into a shell is evacuated from the two upper cover molds 450 and the two lower cover molds 460, the spring 550 in a compressed state can quickly push the upper cover mold 450 and the lower cover mold 460 to reset and close, so as to facilitate the subsequent provision of a stretching mold for the sheet 100.

[0089] Embodiment 4:

[0090] Combination Figure 1-Figure 4 As shown, in the above embodiment, the compression-resistant base 510, the base 530, the clamping base 560 and the four calibration ends 580 are all made of stainless steel;

[0091] Two sets of clamping plates are installed at the bottom of the clamping seat 560, and the hydraulic component 570 is installed in the two sets of clamping plates;

[0092] An elliptical insertion hole is provided inside the calibration end 580 , and a flat transverse groove is provided in the middle of the calibration end 580 , and the flat transverse groove is used to guide the stable delivery of the plate 100 .

[0093] Preferably, the lengths of the crossbeam 520 and the mounting beam 210 can be selected according to production requirements, and an external hydraulic component is provided on the outside of the mounting beam 210. When a plurality of pressure-resistant bases 510 are evenly distributed on the crossbeam 520 of a selected length, the selected evenly distributed plurality of pressure-resistant bases 510 can cooperate with a plurality of sets of calibration ends 580 to provide a rapid stamping and stretching mold for the delivered plurality of plates 100. This device can replace the traditional coordinated operation of multiple devices while reducing cost losses and improving the preparation efficiency of battery shells.

[0094] One of the cutting wires 600 is disposed on the top surface of a plate 100 placed on the top, and the other cutting wire 600 is disposed on the bottom surface of another plate 100 placed on the bottom.

[0095] Preferably, when the two cutting wires 600 are in high frequency and reciprocating vibration, the two plates 100 passing through the two sets of calibration ends 580 can be quickly cut flat by the two cutting wires 600. At this time, the parts of the two plates 100 stretched into the upper shell and the lower shell can keep the incision flat after rapid cutting.

[0096] The working principle and use process of the present invention: At present, lithium battery shells mainly use special stretching dies to perform multi-step stamping and multi-step gradual stamping and stretching on the cut plates until the plates form a qualified shell structure. However, this process takes a long time for the cutting of the plates and the multi-step stamping and stretching. At the same time, the equipment used for the complete stretching of the plates from transportation is large in size, so the area occupied in the factory is also increased accordingly, and the cost of this continuous processing equipment will also increase accordingly.

[0097] Therefore, in order to reduce the cost and various losses of the above-mentioned continuous processing equipment, the two plates 100 with specified sizes are delivered at a uniform speed by using external conveying equipment, and then a plurality of pressure-resistant bases 510 are evenly installed on the outside of the beam 520 according to processing requirements, and the plurality of pressure-resistant bases 510 are set at a certain interval. At this time, the two plates 100 will extend into the horizontal grooves on the inner sides of the two sets of calibration ends 580. At this time, the two plates 100 can achieve continuous stamping and stretching without cutting.

[0098] When in use, when the hydraulic component 570 is running, as the internal hydraulic sub-rod extends toward the outside of the hydraulic mother pipe, the end head 410 installed on the outer end of the hydraulic sub-rod can drive the two traction arms 420 to contract. At this time, the two suspensions 430 can drive the two evenly distributed upper cover molds 450 and the two lower cover molds 460 to close. At this time, the two upper cover molds 450 and the two lower cover molds 460 forming the mold structure can cooperate with the upper module 310 and the lower module 320 to provide a molding and stretching platform for the two passing plates 100. After the above-mentioned multiple pressure-resistant bases 510 are evenly distributed according to needs, by connecting the unified beam 210 with another hydraulic component, as the unified beam 210 drives multiple groups of pull rods 220 to extend outward, The two adjacent tie rods 220 will cooperate with the two trusses 230 to drive the pad 240 toward the pressure-bearing part 331. At this time, the booster sleeve 344 will push the first inclined frame 345 and the second inclined frame 346 to expand outward, and the two clamping plates 337 connected to the outer ends of the first inclined frame 345 and the second inclined frame 346 will push the first core column 335 and the second core column 336 to expand in the opposite direction. Since the length of the second core column 336 is twice the length of the first core column 335, and the length of the second inclined frame 346 is twice the length of the first inclined frame 345, the upper module 310 and the lower module 320 extending in the vertical direction can squeeze and stretch the two plates 100 toward the inner cavities of the two upper cover molds 450 and the two lower cover molds 460 after closing;

[0099] When the above-mentioned sheet 100 is partially stretched and forms the upper cover and the lower cover of the battery shell, the hydraulic sub-rod in the subsequent hydraulic part 570 contracts, and the two traction arms 420 and the two suspensions 430 that are pressurized by the two end heads 410 can extend outward. At this time, the two upper cover molds 450 and the two lower cover molds 460 can expand to a sufficiently large gap. As the two sheets 100 continue to be delivered, the stretched and shaped parts will approach the two cutting wires 600 until the two cutting wires 600 attached to the surface of the two sheets 100 cut the two shaped shells, thereby realizing continuous stamping and stretching operations on sheets that do not need to be cut at the lowest cost. While effectively reducing the wear of the mold cavity on the shell, it can also reduce the disadvantages of traditional multi-equipment transportation and stamping of battery shells, and improve the efficiency of actual stamping and stretching of battery shells.

[0100] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lithium battery shell high-efficiency stretching die, comprising two plates (100) and two cutting wires (600), characterized in that: It also includes a calibration pressure-bearing mechanism (500), a shaping mechanism (400) disposed in the calibration pressure-bearing mechanism (500), a continuous molding mechanism (300) disposed in the calibration pressure-bearing mechanism (500), and a traction stamping mechanism (200) disposed on the continuous molding mechanism (300); The continuous molding mechanism (300) comprises an opening and closing assembly (330), an upper module (310) arranged directly above the opening and closing assembly (330), and a lower module (320) arranged directly below the opening and closing assembly (330), wherein the upper module (310) and the lower module (320) are used to stretch the upper shell and the lower shell of the battery for the two plates (100); The shaping mechanism (400) comprises two upper cover molds (450) for adapting to the upper mold block (310) and stretching one of the plates (100), and two lower cover molds (460) for adapting to the lower mold block (320) and stretching the other plate (100); The calibration pressure-bearing mechanism (500) comprises a pressure-resistant base (510) supporting the opening and closing assembly (330), and four calibration terminals (580) are arranged in the pressure-resistant base (510); Two adjacent calibration ends (580) are used to guide the uniform delivery of the plate (100) and cooperate with the cutting wire (600) to provide a calibration platform for cutting the stretched shell; The calibration pressure-bearing mechanism (500) further comprises a crossbeam (520), the pressure-resistant base (510) being arranged outside the crossbeam (520), four bases (530) being installed inside the pressure-resistant base (510), a slide groove being provided inside the base (530), a cover (540) being installed on the base (530), and a spring (550) being arranged inside the slide groove; A clamping seat (560) is arranged outside the compression-resistant base (510), and a horizontally placed hydraulic component (570) is arranged inside the clamping seat (560); The four bases (530) are used to provide a pressure-bearing platform for a stable slideway for the two upper cover molds (450) and the two lower cover molds (460); The traction punching mechanism (200) comprises a unified mounting beam (210), a pull rod (220) is arranged on the unified mounting beam (210), and a truss (230) is installed at the other end of the pull rod (220); A pad (240) is installed between two adjacent trusses (230), and the pad (240) is used to provide constant pressure kinetic energy for the upper module (310) and the lower module (320) to rise and fall at the same speed; The unified beam (210) is connected to an external hydraulic component and is used to provide a linkage platform for multiple groups of evenly distributed upper modules (310) and lower modules (320); The opening and closing assembly (330) comprises a pressure-bearing member (331), wherein the pressure-bearing member (331) is composed of a T-shaped end column and a rectangular sleeve, and a first sleeve (332) and a second sleeve (333) are arranged inside the rectangular sleeve; The length of the second sleeve (333) is twice the length of the first sleeve (332), and compression springs (334) are provided in the inner cavities of the first sleeve (332) and the second sleeve (333); A first core column (335) is movably mounted in the first sleeve (332), and a second core column (336) is movably mounted in the second sleeve (333); both the first core column (335) and the second core column (336) are provided with cross-shaped ends, and both cross-shaped ends are provided with clamping plates (337); The length of the second core column (336) is twice the length of the first core column (335); The continuous molding mechanism (300) further comprises an extrusion assembly (340), and the extrusion assembly (340) is used to provide a constant pressure driving force for the first core column (335) and the second core column (336); The extrusion assembly (340) comprises a booster sleeve (344) arranged in the backing plate (240), a locking nut being arranged on the threaded section of the booster sleeve (344), and a through hole being opened inside the booster sleeve (344); The two clamps at the inner end of the booster sleeve (344) are respectively connected to a first oblique frame (345) and a second oblique frame (346), and the other end of the first oblique frame (345) is movably mounted on one of the clamping plates (337), while the other end of the second oblique frame (346) is movably mounted on the other clamping plate (337).

2. The lithium battery shell high-efficiency stretching die according to claim 1, characterized in that: Two clamps (341) are arranged on the outer wall of the rectangular sleeve inside the pressure-bearing member (331); a limiting rod (342) is movably mounted inside the two clamps (341); and the other end of the limiting rod (342) is adapted to penetrate into a through hole inside the booster sleeve (344); A return sub-spring (343) is arranged outside the limiting rod (342), and the return sub-spring (343) is used to provide a return thrust for the booster sleeve (344); The length of the second oblique frame (346) is twice the length of the first oblique frame (345); The shaping mechanism (400) further comprises an end head (410) arranged on a hydraulic sub-rod in the hydraulic component (570) and two traction arms (420) movably mounted on the end head (410), and a suspension (430) is movably mounted on the other end of the traction arm (420); The upper cover mold (450) is arranged on an end plate at the top of the suspension (430), and the lower cover mold (460) is arranged on an end plate at the bottom of the suspension (430).

3. The lithium battery shell high-efficiency stretching die according to claim 2, characterized in that: The top and bottom ends of the suspension (430) are both provided with sliders (440), wherein a slider (440) located at the top is movably mounted in a base (530) located at the top, and another slider (440) located at the bottom is movably mounted in a base (530) located at the bottom.

4. The lithium battery shell high-efficiency stretching die according to claim 1, characterized in that: The compression-resistant base (510), the base (530), the clamping base (560) and the four calibration ends (580) are all made of stainless steel; Two groups of clamping plates are installed at the bottom of the clamping seat (560), and the hydraulic components (570) are installed in the two groups of clamping plates.

5. The lithium battery shell high-efficiency stretching die according to claim 1, characterized in that: An elliptical insertion hole is provided inside the calibration end head (580), and a flat transverse groove is provided in the middle of the calibration end head (580), and the flat transverse groove is used to guide the stable delivery of the plate (100); One of the cutting wires (600) is arranged on the top surface of a plate (100) placed on the top, and the other cutting wire (600) is arranged on the bottom surface of another plate (100) placed on the bottom.

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