Battery shell explosion-proof valve hole mold

Abstract

The present invention discloses a die for punching explosion-proof valve holes for a battery shell, comprising: an upper die seat; a lower die seat; a cantilever beam, which is arranged on the lower die seat; a sliding seat, which is arranged on the upper side of the cantilever beam and is arranged to slide vertically; a first reset member, which is used to reset the sliding seat upward; a lower punch, which is arranged on the upper side of the cantilever beam; and an upper die, which is arranged on the upper die seat. By adopting the above scheme, a die for punching explosion-proof valve holes for a battery shell is provided, which is used to form explosion-proof valve holes by punching.

Description

Technical Field

[0001] The invention belongs to the field of production of explosion-proof valve holes for battery shells, and in particular relates to a mold for punching explosion-proof valve holes for battery shells. Background Art

[0002] like Figure 1 As shown, the cell casing 9 is formed by folding a metal plate so that the cell casing 9 is in a flat rectangular shape with a small width, and a runway-shaped explosion-proof valve hole 91 is opened on the upper plate of the cell casing 9 for installation of the explosion-proof valve.

[0003] The conventional processing method for the explosion-proof valve hole is usually laser cutting. However, the laser uses heat to melt the upper plate of the battery cell housing and cuts the excess part along a specific path to form the explosion-proof valve hole.

[0004] However, the laser cutting method will cause carbonization at the cross section of the explosion-proof valve hole, affecting the quality of the explosion-proof valve welding process. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a die for punching an explosion-proof valve hole for a battery cell casing, which is used to form the explosion-proof valve hole by punching.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A die for punching explosion-proof valve holes in a cell shell, used for punching explosion-proof valve holes in a cell shell, comprising: an upper die seat; a lower die seat; a cantilever beam, the cantilever beam being arranged on the lower die seat; a sliding seat, the sliding seat being arranged on the upper side of the cantilever beam and being arranged in a vertical sliding manner; a first reset member, the first reset member being used for resetting the sliding seat upward; a lower punch, the lower punch being arranged on the upper side of the cantilever beam; an upper die, the upper die being arranged on the upper die seat; wherein the cell shell to be processed is The free end of the cantilever beam is sleeved on the outer periphery of the cantilever beam and covers the sliding seat and the lower punch. After the displacement is in place, the lower side of the upper plate of the battery cell shell is supported by the sliding seat to complete the loading. The upper die seat moves downward to drive the upper die to press against the upper side of the upper plate of the battery cell shell, so that the battery cell shell is clamped by the sliding seat and the upper die. The upper die and the lower punch cooperate with each other to act on the upper plate of the battery cell shell, so that the upper plate of the battery cell shell is punched to form an explosion-proof valve hole.

[0008] The present invention is further configured as follows: a material unloading component is arranged on the upper die base, and the material unloading component includes a pushing piece and a pushing cylinder; a stacking channel and a material unloading channel are arranged in the upper die base, the lower end of the stacking channel is connected with the upper end of the concave cavity of the upper concave die, the upper end of the stacking channel is connected with the material unloading channel, the material unloading channel is horizontally arranged, and a material unloading port is arranged at one horizontal end of the material unloading channel; the pushing piece is slidably arranged in the material unloading channel to push the waste sheet punched out from the battery cell casing entering the stacking channel into the material unloading channel toward the material unloading port for unloading, and the pushing cylinder is used to drive the pushing piece to move.

[0009] The present invention is further configured as follows: the peripheral wall of the concave cavity of the upper concave die is flared from bottom to top; an ejector pin and a second reset member are provided on the lower punch, the ejector pin is vertically slidably arranged so that the head of the ejector pin slides upward and extends out of the upper surface of the lower punch, and the second reset member is used to reset the ejector pin upward.

[0010] The present invention is further configured as follows: the stacking channel includes a plurality of connecting channels arranged upward in sequence, each of the connecting channels is columnar, and the horizontal cross-sectional shape of each of the connecting channels increases upward in sequence; the horizontal cross-sectional shape of the lowest connecting channel is larger than the shape at the top of the cavity of the upper die.

[0011] The present invention is further configured as follows: a first positioning piece is provided on the sliding seat or the cantilever beam, and the first positioning piece is used to abut against one end of the length of the battery cell shell sleeved on the cantilever beam to position the battery cell shell; and / or, the upper die or the upper die seat is provided with a second positioning piece below the lower punch, and the number of the second positioning pieces is two, and the two second positioning pieces are used to clamp and position the battery cell shell on both sides of the width before the upper die and the lower punch cooperate.

[0012] The present invention is further configured as follows: a support assembly is arranged on the lower mold base, and the support assembly includes a support member and a driving cylinder. The support member is slidingly arranged to be slidably placed under the free end of the cantilever beam to support the free end of the cantilever beam, and the driving cylinder is used to drive the support member to move.

[0013] The present invention is further configured as follows: the sliding direction of the support member is horizontally arranged and perpendicular to the length direction of the cantilever beam; a support bottom extending toward the free end of the cantilever beam is arranged at the lower side of the fixed end of the cantilever beam, the support bottom is arranged on the lower mold base, and a suspended area is arranged between the support bottom and the free end of the cantilever beam, and the support member slides into the suspended area to be clamped between the free end of the cantilever beam and the support bottom.

[0014] The present invention is further configured as follows: a positioning through hole is vertically provided on the sliding seat, and the inner peripheral shape of the positioning through hole is adapted to the outer peripheral shape of the lower punch, so that the lower punch is inserted into the positioning through hole.

[0015] The present invention is further configured as follows: the sliding seat is in the shape of an elongated strip, and vertically extending sliding guide rods are respectively provided at both ends of the length of the sliding seat, and the cantilever beams are respectively provided with sliding through holes for sliding cooperation of each of the sliding guide rods, and the inner peripheral shape of the sliding through hole is adapted to the outer peripheral shape of the sliding guide rod so that the sliding guide rod can be inserted into the sliding through hole, and the first reset member adopts a compression spring, and the number of the first reset members is two, and each of the first reset members is respectively sleeved on different sliding guide rods.

[0016] The present invention is further configured as follows: a plurality of first connection components are arranged between the upper die base and the lower die base, the first connection components include an upper alignment column fixedly arranged on the upper die base and a lower alignment column fixedly arranged on the lower die base, the upper alignment column and the lower alignment column are arranged in vertical alignment to realize the support of the lower die base on the upper die base and the downward limit of the upper die base when the upper alignment column and the lower alignment column are abutted against each other, a guide sleeve is fixedly arranged at the lower end of the upper alignment column, a guide through hole is arranged in the lower alignment column, the inner peripheral shape of the guide through hole is adapted to the outer peripheral shape of the guide sleeve, so that the guide sleeve is inserted into the guide through hole; the upper die base Multiple groups of second connecting components are arranged between the upper die seat and the lower die seat, the second connecting components include an upper alignment seat fixedly arranged on the upper die seat and a lower alignment seat fixedly arranged on the lower die seat, the upper alignment seat and the lower alignment seat are vertically aligned, a mounting guide rod is fixedly arranged at the lower end of the upper alignment seat, a mounting through hole is arranged in the lower alignment column, the inner circumference shape of the mounting through hole is matched with the outer circumference shape of the mounting guide rod, so that the mounting guide rod can be inserted into the mounting through hole, a third reset member is sleeved on the outer circumference of the mounting guide rod, the third reset member adopts a compression spring, and the upper and lower ends of the third reset member respectively abut against the upper alignment seat and the lower alignment seat.

[0017] The beneficial effects achieved by adopting the above technical solution are as follows:

[0018] 1. The battery cell shell to be processed is directed to the left from the free end of the cantilever beam and is sleeved on the outer periphery of the cantilever beam. After being sleeved in place, the sliding seat and the lower punch are both located in the battery cell shell, so that the lower side of the upper plate of the battery cell shell is supported by the upper surface of the sliding seat to complete the loading. After that, the upper die seat can be moved downward toward the lower die seat, so that the upper die is against the upper side of the upper plate of the battery cell shell, and the battery cell shell is clamped by the sliding seat and the upper die. After that, the upper die seat continues to move downward, so that the upper die is close to the lower punch, so that the lower punch extends into the upper die, and the upper plate of the battery cell shell is punched out to form an explosion-proof valve hole, so that the explosion-proof valve hole is formed by punching, and the punched section will not be carbonized, so that the connection strength after subsequent explosion-proof valve welding is better to ensure the processing quality.

[0019] 2. During the punching process, the lower die seat installed on the punching machine is in a fixed state, and the upper die seat needs to be driven by the punching machine to move downward, so that the battery cell shell after loading remains fixed before being clamped by the upper die, so that the static battery cell shell will not deviate in the front, back, left and right directions. Although the battery cell shell needs to move downward with the sliding seat and the upper die, the battery cell shell is clamped and remains stable in this state, and will not deviate in the front, back, left and right directions. Therefore, the upper die and the lower punch cooperate to punch out a high-precision explosion-proof valve hole on the battery cell shell.

[0020] 3. Compared with the conventional punching die with the concave die at the bottom and the convex die at the top, the waste sheets formed by punching in this embodiment face upward and escape from the battery cell casing during punching because the concave die is at the top and the convex die is at the bottom, preventing the waste sheets from entering the battery cell casing due to downward punching, causing inconvenience in unloading the waste sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 work.

[0022] Figure 1 is a schematic diagram of a battery cell casing;

[0023] Figure 2 It is an assembly diagram of the first embodiment of the present invention;

[0024] Figure 3 is a cross-sectional view of the first embodiment of the present invention;

[0025] Figure 4 is a cross-sectional view of the first embodiment of the present invention;

[0026] Figure 5This is an assembly diagram of the lower die base in the first embodiment of the present invention;

[0027] Figure 6 It is an assembly diagram of an unpunched battery cell housing assembled on a lower die base in Embodiment 1 of the present invention;

[0028] Figure 7 It is an assembly diagram of a punched cell housing assembled on a lower die base in Embodiment 1 of the present invention;

[0029] Figure 8 It is an assembly diagram of the upper die base in the first embodiment of the present invention;

[0030] Fig. 9 for Figure 3 A partial enlarged view of

[0031] Fig.10 for Figure 4 A partial enlarged view of .

[0032] Description of reference numerals:

[0033] 1. Upper die seat; 11. Upper die; 12. Stacking channel; 13. Unloading channel; 14. Unloading hopper; 111. Second positioning member; 121. Connecting channel; 131. Unloading port; 2. Lower die seat; 21. Lower punch; 22. Ejector pin; 23. Second reset member; 3. Cantilever beam; 31. Support bottom; 32. Suspended area; 33. Sliding perforation; 4. Sliding seat; 41. First reset member; 42. First positioning member; 43. Alignment perforation; 44. Sliding guide rod ; 5. Material unloading assembly; 51. Pushing member; 52. Pushing cylinder; 6. Support assembly; 61. Support member; 62. Driving cylinder; 7. First connecting assembly; 71. Upper alignment column; 72. Lower alignment column; 711. Guide sleeve; 721. Guide through hole; 8. Second connecting assembly; 81. Upper alignment seat; 82. Lower alignment seat; 83. Third resetting member; 811. Installation guide rod; 821. Installation through hole; 9. Battery cell housing; 91. Explosion-proof valve hole; 92. Waste sheet. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the present invention, and thus to more clearly define the scope of the present invention, the present invention is described in detail with respect to some specific embodiments of the present invention. It should be noted that the following are only some specific implementation methods of the present invention, which are only part of the embodiments of the present invention, wherein the specific and direct description of the relevant structure is only for the convenience of understanding the present invention, and each specific feature does not naturally and directly limit the scope of implementation of the present invention. The conventional selection and replacement made by those skilled in the art under the guidance of the present invention should be regarded as within the scope of the present invention.

[0035] Embodiment 1:

[0036] like Figure 1 As shown, the present invention discloses a mold for punching explosion-proof valve holes in a battery cell shell, which is used for punching explosion-proof valve holes 91 on a battery cell shell 9, wherein the battery cell shell 9 is formed by folding and welding metal plates, so that the battery cell shell 9 is in a flat rectangular shape with a small width, and a runway-shaped explosion-proof valve hole 91 is punched out on the upper plate of the battery cell shell 9 for installation of the explosion-proof valve, and a waste sheet 92 is punched out.

[0037] Specific structure such as Figure 2-Figure 10 As shown, it includes an upper die base 1, a lower die base 2, a cantilever beam 3, a sliding base 4, a first reset member 41, a lower punch 21, and an upper die 11.

[0038] The cantilever beam 3 is arranged on the upper side of the lower die base 2, wherein the length direction of the cantilever beam 3 is along the left-right direction, and the left end of the cantilever beam 3 is fixed, while the right end is suspended as a free end; the sliding seat 4 is arranged on the upper side of the cantilever beam 3, and is arranged to slide vertically; the first reset member 41 is arranged between the cantilever beam 3 and the sliding seat 4, and the sliding seat 4 is reset upward by a reset force; the lower punch 21 is fixedly arranged on the upper side of the cantilever beam 3 by means of bolts; the upper die 11 is fixedly arranged on the lower side of the upper die base 1 by means of bolts.

[0039] like Figure 3 As shown, in the present embodiment, a stacking channel 12 extending vertically and a material discharge channel 13 extending left and right are arranged in the upper die base 1, the lower end of the stacking channel 12 is communicated with the upper end of the cavity of the upper concave die 11, the upper end of the stacking channel 12 is communicated with the middle part of the material discharge channel 13, and in addition, a material discharge port 131 is arranged at the right end of the material discharge channel 13; correspondingly, a material discharge assembly 5 is arranged on the upper die base 1, and the material discharge assembly 5 includes a push piece 51 and a push cylinder 52, wherein the push piece 51 enters the material discharge channel 13 from the left side of the material discharge channel 13, and is slidably arranged in the material discharge channel 13 along the left and right directions, and the push cylinder 52 is fixed by bolts or the like. It is fixedly installed on the left side of the upper die base 1, and the output shaft of the pushing cylinder 52 is connected to the pushing member 51 to drive the pushing member 51 to move left and right, so that the waste sheet 92 punched out by the concave-convex fit of the upper die 11 and the lower punch 21 is stacked in the stacking channel 12 and enters the unloading channel 13. The pushing cylinder 52 works and drives the pushing member 51 to slide to the right to push the waste sheet 92 entering the unloading channel 13 to the right through the unloading port 131 to realize automatic unloading. In addition, since the waste sheet 92 is unloaded on the upper side of the upper die 11, the discharge of the waste sheet 92 will not interfere with the concave-convex fit of the upper die 11 and the lower punch 21.

[0040] Preferably, the lower surface of the material discharge channel 13 on the right side of the stacking channel 12 in this embodiment is inclined downward, so that after the pushing member 51 pushes the waste sheet 92 to the right, the material discharge can be guided more smoothly through the inclined lower surface.

[0041] In addition, the upper mold base 1 in this embodiment is provided with a discharge hopper 14 at the discharge port 131, so that the waste pieces 92 leaving the discharge port 131 are discharged forward under the action of the discharge hopper 14, and the discharged waste pieces 92 are kept away from the free end of the cantilever beam 3 to prevent the discharge and loading of the battery cell casing 9 from being affected.

[0042] Preferably, Fig. 9 As shown, the peripheral wall of the cavity of the upper die 11 in this embodiment is expanded from bottom to top, so that after the waste piece 92 that matches the shape of the lower end of the cavity of the upper die 11 is punched into the cavity of the upper die 11, the waste piece 92 is placed in the cavity of the upper die 11 with a clearance fit due to the expansion of the cavity of the upper die 11, and the waste piece 92 is supported on the inner wall of the cavity of the upper die 11 under the action of gravity and remains stable, and in the next punching, the lower punch 21 only needs to overcome the gravity of the stacked waste pieces 92, so that the punching resistance is smaller.

[0043] Preferably, the stacking channel 12 in this embodiment includes a plurality of connecting channels 121 arranged upward in sequence, each connecting channel 121 is columnar, and the horizontal cross-sectional shape of each connecting channel 121 increases successively upward; the horizontal cross-sectional shape of the lowest connecting channel 121 is larger than the shape at the top of the cavity of the upper die 11, so that the stacking provides sufficient space to ensure that there is a gap around the waste sheet 92 through further expansion.

[0044] It should be noted that the waste sheet 92 becomes hot due to cutting, so that the waste sheet 92 will expand and become larger to a certain extent, so that the expanded cavity of the upper die 11 and the gradually enlarged connecting channels 121 can better adapt to this phenomenon and prevent the waste sheet 92 from being stuck in the cavity of the upper die 11 or the stacking channel 12.

[0045] In addition, if Figure 5 , Fig. 9 As shown, in this embodiment, an ejector pin 22 and a second reset member 23 are provided on the lower punch 21, and the ejector pin 22 is vertically slidably arranged so that the head of the ejector pin 22 slides upward and extends out of the upper surface of the lower punch 21, and the second reset member 23 is arranged between the cantilever beam 3 and the ejector pin 22 so that the second reset member 23 resets the ejector pin 22 upward.

[0046] Therefore, after the upper die 11 and the lower punch 21 are matched, the ejector pin 22 pushes the punched waste sheet 92 upward through the second reset member 23, so as to better separate the waste sheet 92 from the lower punch 21 when the upper die 11 and the lower punch 21 are separated, and prevent the waste sheet 92 from remaining in the lower punch 21 and affecting subsequent processing.

[0047] In addition, if Figure 3 , Figure 5-Figure 7 , Fig. 9 As shown, a first positioning member 42 is fixedly installed on the upper left side of the sliding seat 4 in this embodiment by means of bolts, so that the leftward travel of the battery cell housing 9 during the installation process is limited by the first positioning member 42, so that rapid positioning is performed by abutting against the first positioning member 42, making loading more convenient and the positioning accuracy high.

[0048] In other implementations, the first positioning member 42 may also be disposed on the cantilever beam 3 .

[0049] In addition, if Figure 4 , Figure 8 , Fig.10 As shown, the upper die 11 in this embodiment is located below the lower punch 21 and is provided with a second positioning member 111. There are two second positioning members 111, which are arranged at a front-to-back spacing, and the spacing between the two second positioning members 111 is adapted to the width of the battery cell housing 9, so that in the process of the upper die base 1 moving toward the lower die base 2, the width sides of the battery cell housing 9 are first clamped and positioned by the two second positioning members 111 to achieve high-precision left and right positioning, and the second positioning members 111 also limit the left and right side panels of the battery cell housing 9 when the upper die 11 and the lower punch 21 are matched, so as to prevent the deformation at the explosion-proof valve hole 91 from causing the side panels of the battery cell housing 9 to deform, thereby affecting the production quality.

[0050] The width of the sliding seat 4 is adapted to the width of the inner cavity of the battery housing 9 , so that the side panels of the battery housing 9 are not deformed during the punching process under the inner and outer clamping of the second positioning member 111 and the sliding seat 4 .

[0051] In addition, if Figure 2 , Figure 5-Figure 7 As shown, a support assembly 6 is provided on the lower die base 2 in this embodiment, and the support assembly 6 includes a support member 61 and a driving cylinder 62. The support member 61 cooperates with the slide rail to achieve sliding setting along the front-rear direction, and the support member 61 moves to the lower end of the cantilever beam 3 by sliding, and the driving cylinder 62 is fixedly installed on the lower die base 2 by means of bolts or the like, and the support member 61 is driven to slide by connecting the output shaft of the driving cylinder 62 and the support member 61.

[0052] Therefore, after the battery cell casing 9 is loaded, the support member 61 is driven by the driving cylinder 62 to the bottom of the free end of the cantilever beam 3 to support the free end of the cantilever beam 3, so that when the upper die 11 and the lower punch 21 are in the concave-convex matching process, both ends of the length of the cantilever beam 3 are in a supported state, thereby preventing the position of the explosion-proof valve hole 91 from being offset due to the bending of the free end of the cantilever beam 3, thereby affecting the processing accuracy.

[0053] In addition, a support bottom 31 extending to the right is integrally formed on the lower side of the fixed end of the cantilever beam 3. The support bottom 31 is arranged on the lower mold base 2 and is fixedly installed with the lower mold base 2 by bolts, and a suspended area 32 is arranged between the support bottom 31 and the free end of the cantilever beam 3. The support member 61 slides into the suspended area 32 to be clamped between the free end of the cantilever beam 3 and the support bottom 31.

[0054] Therefore, the cantilever beam 3 is installed on the lower die base 2 and does not affect the vertical height of the suspended area 32. Therefore, it is only necessary to use a support member 61 that is adapted to the vertical height of the suspended area 32 and adjust the position to effectively support the free end of the cantilever beam 3, thereby preventing a large gap between the support member 61 of the cantilever beam 3 and the free end of the cantilever beam 3 due to assembly errors, which causes the cantilever beam 3 to bend when the upper die 11 and the lower punch 21 are matched, affecting the processing accuracy. In addition, the height of the support member 61 is adapted to the height of the suspended area 32, so that the force acting on the free end of the cantilever beam 3 is transmitted to the support bottom 31 through the support member 61, so as to prevent the support member 61 from being damaged due to excessive force.

[0055] Preferably, Figure 5 As shown, the sliding seat 4 in this embodiment is vertically penetrated by a positioning perforation 43, and the inner peripheral shape of the positioning perforation 43 is adapted to the outer peripheral shape of the lower punch 21, so that the lower punch 21 is penetrated in the positioning perforation 43, so that the sliding seat 4 has a guiding sliding effect under the cooperation of the positioning perforation 43 and the lower punch 21. In addition, when the upper die 11 and the lower punch 21 cooperate with each other, the inner periphery of the formed explosion-proof valve hole 91 is filled with the lower punch 21, and the upper and lower sides of the formed explosion-proof valve hole 91 are covered by the sliding seat 4 and the upper die 11, so that there is no gap, so that the periphery of the explosion-proof valve hole 91 is deformed during the punching process to ensure the production quality of the explosion-proof valve hole 91.

[0056] Preferably, Figure 3 , Fig. 9As shown, the sliding seat 4 in this embodiment is in the shape of an elongated strip, and vertically extending sliding guide rods 44 are respectively arranged on the lower sides of the two ends of the length of the sliding seat 4, and the cantilever beam 3 is respectively provided with sliding through holes 33 for sliding cooperation of each sliding guide rod 44, and the inner peripheral shape of the sliding through hole 33 is adapted to the outer peripheral shape of the sliding guide rod 44, so that the sliding guide rod 44 is penetrated into the sliding through hole 33, and the first reset member 41 adopts a compression spring, and the number of the first reset members 41 is two, and each first reset member 41 is respectively sleeved on a different sliding guide rod 44.

[0057] Therefore, the two sets of sliding guide rods 44 and sliding through holes 33 cooperate at both ends of the sliding seat 4 in the length direction to guide the sliding seat 4 to slide, so that the sliding of the sliding seat 4 is smoother. In addition, a compression spring is used as the first reset member 41 and is sleeved on the sliding guide rod 44 to provide a stable reset force.

[0058] Specifically, the sliding guide rod 44 adopts a screw rod, so that the sliding guide rod 44 is fixedly installed on the sliding seat 4 by a threaded connection, and the head of the sliding guide rod 44 is located below the sliding through hole 33 to limit the sliding guide rod 44 from escaping from the sliding through hole 33 upward, so as to limit the upward travel of the sliding seat 4.

[0059] Among them, Figure 2-Figure 8 As shown, a plurality of first connection components 7 are arranged between the upper die base 1 and the lower die base 2. The first connection components 7 include an upper alignment column 71 fixedly arranged on the upper die base 1 and a lower alignment column 72 fixedly arranged on the lower die base 2. The upper alignment column 71 and the lower alignment column 72 are arranged in a vertical alignment to achieve the support of the lower die base 2 on the upper die base 1 and the downward limit of the upper die base 1 when the upper alignment column 71 and the lower alignment column 72 are against each other. In addition, a guide sleeve 711 is fixedly arranged at the lower end of the upper alignment column 71, and a guide sleeve 711 is arranged inside the lower alignment column 72. A guide through hole 721 is provided, and the inner circumference shape of the guide through hole 721 is adapted to the outer circumference shape of the guide sleeve 711, so that the guide sleeve 711 is inserted into the guide through hole 721; the guide sleeve 711 and the guide through hole 721 enable the guided sliding of the upper die base 1 and the lower die base 2, so that the alignment accuracy of the upper die 11 and the lower punch 21 is higher. In addition, the upper die base 1 is limited downward by the upper alignment column 71 and the lower alignment column 72, and can be effectively supported when the upper die base 1 is placed on the lower die base 2.

[0060] Specifically, bolts are passed through the inner circumference of the guide sleeve 711 , and the guide sleeve 711 is fixed to the lower alignment post 72 by threading the bolts and the upper alignment post 71 .

[0061] Among them, Figure 2-Figure 8As shown, a plurality of second connecting components 8 are arranged between the upper die base 1 and the lower die base 2. The second connecting components 8 include an upper alignment seat 81 fixedly arranged on the upper die base 1 and a lower alignment seat 82 fixedly arranged on the lower die base 2. The upper alignment seat 81 and the lower alignment seat 82 are arranged in vertical alignment. A mounting guide rod 811 is fixedly arranged at the lower end of the upper alignment seat 81. A mounting through hole 821 is arranged in the lower alignment column 72. The inner peripheral shape of the mounting through hole 821 is similar to the outer peripheral shape of the mounting guide rod 811. It is adapted so that the installation guide rod 811 can be inserted into the installation through-hole 821. In addition, a third reset member 83 is sleeved on the outer periphery of the installation guide rod 811. The third reset member 83 adopts a compression spring, and the upper and lower ends of the third reset member 83 respectively abut against the upper alignment seat 81 and the lower alignment seat 82, so that a guiding role is played through the cooperation of the installation guide rod 811 and the installation through-hole 821, and the upper mold base 1 is better reset upwards through the third reset member 83 sleeved on the outer periphery of the installation guide rod 811.

[0062] Specifically, the installation guide rod 811 can be fixed to the upper alignment seat 81 by interference fit, threaded connection, welding, etc.

[0063] Embodiment 2:

[0064] The present invention discloses a production process for an explosion-proof valve hole of a battery cell shell, and uses the battery cell shell explosion-proof valve hole punching mold described in the first embodiment to process the explosion-proof valve hole 91 of the battery cell shell 9.

[0065] The steps include:

[0066] S1, the battery cell housing 9 to be processed is installed on the cantilever beam 3 to complete the loading;

[0067] Step S1 includes:

[0068] S11, one end of the battery cell housing 9 to be processed in the length direction is sleeved from the free end of the cantilever beam 3 to the outer periphery of the cantilever beam 3, and continuously displaced along the length direction of the cantilever beam 3;

[0069] S12, when the battery cell housing 9 continues to move along the length direction of the cantilever beam 3, the battery cell housing 9 covers the sliding seat 4 and the lower punch 21;

[0070] S13, when the cell housing 9 continues to move along the length direction of the cantilever beam 3, one end of the cell housing 9 in the length direction abuts against the first positioning member 42 to stop the displacement, and the cell housing 9 is completely sleeved on the cantilever beam 3, and the lower side of the upper plate is also supported by the sliding seat 4, thereby completing the loading;

[0071] S2, the driving cylinder 62 drives the support member 61 to move to the suspended area 32 to support the free end of the cantilever beam 3, and the support member 61 prevents the battery cell housing 9 from escaping from the cantilever beam 3;

[0072] S3, closing the mold, the upper concave mold 11 and the lower convex mold 21 cooperate with each other to punch out the explosion-proof valve hole 91 on the battery cell housing 9;

[0073] Step S3 includes:

[0074] S31, the upper mold base 1 moves downward so that the two second positioning members 111 are on both sides of the width of the battery cell housing 9 to clamp and position the battery cell housing 9;

[0075] S32, the upper die seat 1 continues to move downward so that the bottom surface of the upper die 11 abuts against the upper side of the upper plate of the cell housing 9, so that the upper plate of the cell housing 9 is clamped up and down by the upper die seat 1 and the sliding seat 4;

[0076] S33, the upper die seat 1 continues to move downward to make the cell housing 9, the sliding seat 4 and the upper die 11 move downward synchronously, and the lower side of the upper plate of the cell housing 9 abuts against the head of the ejector pin 22 to drive the ejector pin 22 to move downward, so that the lower side of the upper plate of the cell housing 9 abuts against the upper surface of the lower punch 21;

[0077] S34, the upper die holder 1 continues to move downward so that the upper die 11 and the lower die 21 cooperate with each other to punch out the explosion-proof valve hole 91 on the upper plate of the battery cell housing 9, and the punched waste sheets 92 are stacked into the stacking channel 12;

[0078] S4, mold opening, the upper concave mold 11 and the lower convex mold 21 are separated;

[0079] Step S4 includes:

[0080] S41, the upper die holder 1 moves upward to gradually separate the upper die 11 and the lower punch 21, and the ejector pin 22 is simultaneously reset upward under the action of the second reset member 23 to separate the waste sheet 92 from the lower punch 21, and the second positioning member 111 is released upward from the clamping position of the battery cell housing 9;

[0081] S42, the sliding seat 4 is reset upward under the action of the first reset member 41;

[0082] S5, the driving cylinder 62 drives the support member 61 to move and leave the suspended area 32 to release the support for the free end of the cantilever beam 3 and release the restriction on the battery cell housing 9 to escape from the cantilever beam 3;

[0083] S6, removing the punched battery cell casing 9 from the cantilever beam 3 to complete the blanking of the battery cell casing 9.

[0084] In addition, it also includes step S7, the pushing cylinder 52 drives the pushing member 51 to move and push the waste pieces 92 stacked in the discharge channel 13 out of the discharge port 131 to realize the discharge of the waste pieces 92, wherein step S7 can be located before or after any step of step S1-S6, and optimally, step S7 is arranged between step S3 and step S4. At this time, due to the concave-convex cooperation between the upper die 11 and the lower punch 21, the waste pieces 92 are lifted to the highest position under the action of the lower punch 21, so that the number of waste pieces 92 entering the discharge channel 13 is the largest and the waste pieces 92 are most efficiently pushed and discharged.

[0085] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A die for punching explosion-proof valve holes in a battery cell housing, used for punching explosion-proof valve holes (91) in a battery cell housing (9), characterized in that: include: Upper die base (1); Lower die base (2); A cantilever crossbeam (3), wherein the cantilever crossbeam (3) is arranged on the lower die base (2); A sliding seat (4), the sliding seat (4) being arranged on the upper side of the cantilever beam (3) and being arranged to slide vertically; A first restoring member (41), the first restoring member (41) being used to restore the sliding seat (4) upward; A lower punch (21), the lower punch (21) being arranged on the upper side of the cantilever beam (3); An upper concave die (11), wherein the upper concave die (11) is arranged on the upper die base (1); The cell casing (9) to be processed is sleeved on the outer periphery of the cantilever beam (3) from the free end of the cantilever beam (3) and covers the sliding seat (4) and the lower punch (21), and after being moved into place, the lower side of the upper plate of the cell casing (9) is supported by the sliding seat (4) to complete the loading; The upper die seat (1) moves downward to drive the upper die (11) to abut against the upper side of the upper plate of the cell housing (9), so that the cell housing (9) is clamped by the sliding seat (4) and the upper die (11); the upper die (11) and the lower die (21) cooperate with each other in a concave-convex manner to act on the upper plate of the cell housing (9), so that the upper plate of the cell housing (9) is punched to form an explosion-proof valve hole (91); A blanking assembly (5) is provided on the upper die base (1), and the blanking assembly (5) comprises a pushing member (51) and a pushing cylinder (52); A stacking channel (12) and a material discharge channel (13) are provided in the upper die seat (1); the lower end of the stacking channel (12) is connected to the upper end of the cavity of the upper die (11); the upper end of the stacking channel (12) is connected to the material discharge channel (13); the material discharge channel (13) is arranged horizontally, and a material discharge port (131) is provided at one horizontal end of the material discharge channel (13); The pushing member (51) is slidably disposed in the material discharge channel (13) to push the waste sheet (92) punched out from the battery cell casing (9) entering the material discharge channel (13) from the stacking channel (12) toward the material discharge port (131) for material discharge, and the pushing cylinder (52) is used to drive the pushing member (51) to move.

2. The mold for punching explosion-proof valve holes for battery cell shells according to claim 1, characterized in that: The peripheral wall of the concave cavity of the upper concave die (11) is arranged to expand from bottom to top; The lower punch (21) is provided with an ejector pin (22) and a second reset member (23); the ejector pin (22) is arranged to slide vertically so that the head of the ejector pin (22) slides upward and extends out of the upper surface of the lower punch (21); the second reset member (23) is used to reset the ejector pin (22) upward.

3. The mold for punching explosion-proof valve holes for battery cell shells according to claim 2, characterized in that: The stacking channel (12) comprises a plurality of connecting channels (121) arranged in sequence upward, each connecting channel (121) is columnar, and the horizontal cross-sectional shape of each connecting channel (121) increases in sequence upward; The horizontal cross-sectional shape of the lowest connecting channel (121) is larger than the shape of the top of the cavity of the upper die (11).

4. The mold for punching explosion-proof valve holes for battery cell shells according to claim 1, characterized in that: The sliding seat (4) or the cantilever beam (3) is provided with a first positioning member (42), the first positioning member (42) being used to abut against one end of the length of the battery cell housing (9) sleeved on the cantilever beam (3) to position the battery cell housing (9); and / or, The upper die (11) or the upper die seat (1) is provided with a second positioning member (111) located below the lower convex die (21), and the number of the second positioning members (111) is two. The two second positioning members (111) are used to clamp and position both sides of the width of the battery cell casing (9) before the upper die (11) and the lower convex die (21) are matched.

5. The mold for punching explosion-proof valve holes for battery cell shells according to claim 1, characterized in that: A support assembly (6) is provided on the lower die base (2), and the support assembly (6) comprises a support member (61) and a driving cylinder (62). The support member (61) is slidably arranged to be slidably disposed below the free end of the cantilever beam (3) to support the free end of the cantilever beam (3), and the driving cylinder (62) is used to drive the support member (61) to move.

6. The mold for punching explosion-proof valve holes for battery cell shells according to claim 5, characterized in that: The sliding direction of the support member (61) is arranged horizontally and is perpendicular to the length direction of the cantilever beam (3); A supporting bottom (31) extending toward the free end of the cantilever beam (3) is provided at the lower side of the fixed end of the cantilever beam (3); the supporting bottom (31) is provided on the lower die base (2); a suspended area (32) is provided between the supporting bottom (31) and the free end of the cantilever beam (3); the supporting member (61) slides into the suspended area (32) to be clamped between the free end of the cantilever beam (3) and the supporting bottom (31).

7. The mold for punching explosion-proof valve holes for battery cell shells according to claim 1, characterized in that: The sliding seat (4) is provided with an alignment through hole (43) penetrating vertically, and the inner peripheral shape of the alignment through hole (43) is matched with the outer peripheral shape of the lower punch (21), so that the lower punch (21) is inserted into the alignment through hole (43).

8. The mold for punching explosion-proof valve holes for battery cell shells according to claim 1 or 7, characterized in that: The sliding seat (4) is in the shape of an elongated strip. Both ends of the length of the sliding seat (4) are respectively provided with sliding guide rods (44) extending vertically. The cantilever cross beam (3) is respectively provided with sliding through holes (33) for sliding cooperation of each of the sliding guide rods (44). The inner peripheral shape of the sliding through hole (33) is adapted to the outer peripheral shape of the sliding guide rod (44) so ​​that the sliding guide rod (44) is inserted into the sliding through hole (33). The first reset member (41) adopts a compression spring. The number of the first reset members (41) is two, and each of the first reset members (41) is respectively sleeved on a different sliding guide rod (44).

9. The mold for punching explosion-proof valve holes for battery cell shells according to claim 1, characterized in that: A plurality of first connection components (7) are arranged between the upper die base (1) and the lower die base (2), wherein the first connection components (7) include an upper alignment column (71) fixedly arranged on the upper die base (1) and a lower alignment column (72) fixedly arranged on the lower die base (2), wherein the upper alignment column (71) and the lower alignment column (72) are arranged in a vertical alignment so as to realize the support of the lower die base (2) on the upper die base (1) and the downward limit of the upper die base (1) when the upper alignment column (71) and the lower alignment column (72) are abutted against each other, wherein a guide sleeve (711) is fixedly arranged at the lower end of the upper alignment column (71), and a guide through hole (721) is arranged in the lower alignment column (72), wherein the inner peripheral shape of the guide through hole (721) is matched with the outer peripheral shape of the guide sleeve (711), so that the guide sleeve (711) is inserted into the guide through hole (721); A plurality of second connection components (8) are arranged between the upper die seat (1) and the lower die seat (2), the second connection components (8) comprising an upper alignment seat (81) fixedly arranged on the upper die seat (1) and a lower alignment seat (82) fixedly arranged on the lower die seat (2), the upper alignment seat (81) and the lower alignment seat (82) being arranged in a vertical alignment, a mounting guide rod (811) being fixedly arranged at the lower end of the upper alignment seat (81), and a mounting guide rod (811) being arranged inside the lower alignment column (72). A mounting through hole (821) is provided, the inner circumference shape of the mounting through hole (821) is matched with the outer circumference shape of the mounting guide rod (811), so that the mounting guide rod (811) is inserted into the mounting through hole (821), and a third reset member (83) is sleeved on the outer circumference of the mounting guide rod (811), the third reset member (83) adopts a compression spring, and the upper and lower ends of the third reset member (83) respectively abut against the upper alignment seat (81) and the lower alignment seat (82).

Images