Metal cover plate forming mold and method for lithium battery cell shell

Abstract

The invention belongs to the technical field of lithium battery processing, and particularly relates to a metal cover plate forming mold and method for a lithium battery cell shell, the metal cover plate forming mold comprises a supporting mechanism, a mold mechanism and a feeding mechanism, the supporting mechanism comprises a supporting frame and a driving part installed on the supporting frame; the mold mechanism comprises a mold base which is installed on the supporting frame and provided with a mold groove in the top and a forming male mold which is connected with the output end of the driving piece and corresponds to the mold groove. The forming male die has the first state that the forming male die shrinks when not conducting die punching and the second state that the forming male die stretches towards the periphery and tightly extrudes a cut metal plate on the inner wall of a die groove when conducting die punching. When the driving piece works to drive the forming male die to move downwards to conduct die punching, the feeding mechanism is automatically driven to start working; and the cut metal plate is conveyed to the position corresponding to the mold groove and the forming male mold, and the problem that in the forming process of the metal cover plate of the lithium battery cell shell, molds used for the metal cover plates of different specifications and sizes are not efficient enough is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery processing, and in particular to a metal cover plate forming die and method for a lithium battery cell shell. Background Art

[0002] Lithium-powered batteries are a new type of high-energy battery successfully developed in the 20th century. They have been widely used in military and civilian small electrical appliances due to their advantages such as high energy, high battery voltage, wide operating temperature range, and long storage life. They are mainly composed of internal battery cells and external protective shells, in which the shells include metal cover plates.

[0003] At present, the main method for processing the metal cover of the lithium battery cell shell is to cooperate with the punch of the upper die and the die groove of the lower die to punch the cut metal plate into the die groove. During the stamping process, the side wall of the die groove is used to bend the metal plate around to obtain the required metal cover.

[0004] However, since the metal cover plates of the battery cell shells of lithium batteries have different specifications, in order to obtain metal cover plates of different specifications during the production process, either different upper and lower molds are replaced, or a mold whose size can be adjusted manually is designed. Among them, the former is more costly, and although the latter does not require the corresponding mold to be replaced every time, it also requires workers to adjust the mold to the required size nearby, which is relatively time-consuming, resulting in the metal cover plate of the lithium battery battery cell shell The mold used in the molding process is not efficient enough. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] Therefore, the purpose of the present invention is to provide a metal cover plate forming mold and method for a lithium battery cell shell, which replaces the traditional mold and method for forming the metal cover plate of the lithium battery cell shell, and avoids the problem of insufficient efficiency of the molds used for metal cover plates of different specifications and sizes during the molding process of the metal cover plate of the lithium battery cell shell.

[0007] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0008] A metal cover plate forming die for a lithium battery cell shell, comprising:

[0009] A supporting mechanism, comprising a supporting frame and a driving member mounted on the supporting frame;

[0010] A mold mechanism, comprising a mold base mounted on the support frame and having a mold groove on the top, and a forming convex mold connected to the output end of the driving member and corresponding to the mold groove, wherein the forming convex mold has a first state of contraction when not punching and a second state of stretching to all sides during punching and tightly pressing the cut metal plate against the inner wall of the mold groove, wherein when the driving member starts to work and drives the forming convex mold to descend the die and punch the metal plate into the die groove, the forming convex mold automatically switches from the first state to the second state;

[0011] A feeding mechanism is installed on the die base, wherein when the driving member works to drive the forming punch to move downward for punching, the feeding mechanism is automatically driven to start working and transport the cut metal plate to a position corresponding to the die groove and the forming punch.

[0012] As a preferred solution of a metal cover plate forming mold for a lithium battery cell shell described in the present invention, the support frame includes a base with a fixing groove on the top and multiple clamping parts around the inner wall of the fixing groove, and a mounting frame installed on the side wall of the base.

[0013] As a preferred solution of a metal cover forming mold for a lithium battery cell shell described in the present invention, the forming punch includes a connecting seat connected to the output end of the driving member at the top, a base plate transmission connected to the bottom of the connecting seat, an extending member movably installed around the base plate, and a first transmission member with one end transmission connected to the connecting seat and the other end transmission connected to the extending member.

[0014] As a preferred solution of the metal cover plate forming mold for the lithium battery cell shell of the present invention, the bottom of the connecting seat is provided with a connecting cylinder with multiple limiting holes uniformly arranged on the outer wall;

[0015] The top of the bottom plate is provided with a connecting column corresponding to the connecting tube and having an elastic protrusion on the outer side wall, and the side walls around the bottom plate are provided with limiting grooves;

[0016] The extending member comprises a side plate, a first limiting sliding rod installed on one side of the side plate through a connecting rod, and a limiting rod located on the side wall of the side plate and corresponding to the limiting groove.

[0017] As a preferred solution of the metal cover plate forming mold for the lithium battery cell shell of the present invention, a thread groove is provided at the bottom of the connecting seat;

[0018] The first transmission member includes a turntable rotatably mounted on the top of the base plate and having an arc-shaped limiting sliding groove on the top, and a first threaded rod located on the top of the turntable and corresponding to the threaded groove, wherein the first limiting sliding rod extends into the arc-shaped limiting sliding groove.

[0019] As a preferred solution of a metal cover plate forming mold for a lithium battery cell shell described in the present invention, the feeding mechanism includes a fixing frame with a positioning groove on the top side and a feeding assembly installed on one side of the fixing frame and transmission connected to the connecting seat.

[0020] As a preferred solution of the metal cover plate forming mold for the lithium battery cell shell of the present invention, the inner wall of the positioning groove is provided with a through groove corresponding to the feeding assembly;

[0021] A first pulley is installed on the side wall of the mounting frame, and a driving gear is installed on the side wall of the first pulley;

[0022] The side wall of the connecting seat is provided with a sawtooth plate corresponding to the driving gear through a connecting rod;

[0023] The feeding assembly includes a plurality of rollers installed on one side of the fixed frame and having side walls connected to track wheels via a rotating shaft, and a pulley group connected to one of the track wheels and connected to the first pulley via a belt, wherein the plurality of track wheels are connected to each other via tracks.

[0024] As a preferred solution of a metal cover plate forming mold for a lithium battery cell shell described in the present invention, a cleaning roller with a cleaning brush on the outer wall is arranged in the through groove, and a second pulley connected to the pulley group through a belt is arranged on the side wall of the cleaning roller.

[0025] As a preferred solution of the metal cover plate forming mold for the lithium battery cell shell of the present invention, wherein, movable plates are provided on both sides of the inner wall of the mold groove, and a second transmission member having one end drivingly connected to the two movable plates and the other end drivingly connected to the pulley group is provided in the mold groove;

[0026] The second transmission member includes two second limiting sliding rods located on the inner wall of the mold groove, two second threaded rods located on the inner wall of the mold groove, and two bevel gear sets with one end connected to the second threaded rods through a rotating shaft and the other end having a third pulley, the two third pulleys are connected by a belt and one of the third pulleys is connected to the pulley set by a belt, one end of the movable plate is slidably sleeved on the second limiting sliding rod and the other end is threadedly sleeved on the second threaded rod.

[0027] A method for forming a metal cover plate for a lithium battery cell shell, comprising the above-mentioned metal cover plate forming mold for a lithium battery cell shell, and the specific steps are as follows:

[0028] S1. Place the cut metal sheet on the loading assembly. When stamping the metal sheet, the driving part drives the forming punch to move downward.

[0029] S2. When the forming punch moves downward, the feeding assembly is driven to convey the metal plate into the positioning groove. During this process, the impurities on the surface of the metal plate body are scraped off by the rotating cleaning roller. At the same time, the two movable plates approach each other.

[0030] S3, when the forming punch is lowered, the metal plate is pressed into the die groove by the forming punch, and as the driving member continues to work, the forming punch switches from the first state to the second state, and the extended forming punch tightly presses the bent part of the metal plate against the inner wall of the die groove until the forming punch can no longer be extended, and a metal cover plate of the lithium battery cell shell is formed in the die groove;

[0031] S4. When the driving part drives the forming punch to rise, the two movable plates in the mold groove move away from each other, and because the relative positions of the bottom plate and the connecting seat remain unchanged at the left and right lower limits of the limiting holes and the elastic protrusions, the extended forming punch still supports the four sides of the formed metal cover plate. As a result, as the forming punch rises, the metal cover plate of the battery cell shell formed in the mold groove is brought out of the mold groove, completing automatic demolding.

[0032] Compared with the prior art, the beneficial effect of the present invention is that, when the driving member drives the forming punch to descend for punching, the feeding mechanism is automatically driven to start working, and the cut metal plate is transported to the position corresponding to the die groove and the forming punch. After the forming punch squeezes the metal plate into the die groove, as the forming punch continues to descend, the forming punch switches from the first state to the second state and begins to stretch in all directions until the bent part of the metal plate is tightly squeezed and fitted to the inner wall of the die groove, thereby completing the forming of the metal cover corresponding to the die groove, replacing the traditional mold and method for forming the metal cover of the lithium battery cell shell, and avoiding the problem of inefficiency of the molds used for metal cover plates of different specifications and sizes during the forming process of the metal cover of the lithium battery cell shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in combination with the accompanying drawings and detailed embodiments. 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 creative labor. Among them:

[0034] Figure 1 It is a structural schematic diagram of a metal cover plate forming mold for a lithium battery cell shell from one perspective of the present invention;

[0035] Figure 2 It is a structural schematic diagram of another perspective of a metal cover plate forming mold for a lithium battery cell shell of the present invention;

[0036] Figure 3 This is a structural exploded view of a metal cover plate forming mold for a lithium battery cell shell of the present invention;

[0037] Figure 4 This is a disassembled view of a mold structure of a metal cover plate forming mold for a lithium battery cell shell according to the present invention;

[0038] Figure 5 It is a structural schematic diagram of a forming convex mold of a metal cover plate forming mold for a lithium battery cell shell in a first state according to the present invention;

[0039] Figure 6 It is a structural schematic diagram of a forming convex mold of a metal cover plate forming mold for a lithium battery cell shell in a second state according to the present invention;

[0040] Figure 7 This is a structural exploded view of a forming convex die of a metal cover plate forming die for a lithium battery cell shell according to the present invention;

[0041] Figure 8 The present invention is a structural schematic diagram of a forming convex die feeding mechanism of a metal cover plate forming die for a lithium battery cell shell.

[0042] In the figure: 100, support mechanism; 110, support frame; 110a, base; 110a-1, fixed groove; 110a-2, clamping member; 110b, mounting frame; 110b-1, first pulley; 110b-11, driving gear; 120, driving member; 200, mold mechanism; 210, mold base; 210a, mold groove; 210a-1, movable plate; 210a-2, second transmission member; 210a-21, second limit sliding rod; 210a-22, second threaded rod; 210a-23, bevel gear set; 210a-231, third pulley; 220, forming punch; 220a, connecting seat; 220a-1, connecting cylinder; 2 20a-2, serrated plate; 220b, bottom plate; 220b-1, limit groove; 220b-2, connecting column; 220c, extension member; 220c1, side plate; 220c2, first limit slide rod; 220c3, limit rod; 220d, first transmission member; 220d-1, turntable; 220d-11, arc-shaped limit slide groove; 220d-2, first threaded rod; 300, feeding mechanism; 310, fixing frame; 310a, positioning groove; 310a-1, through groove; 310a-2, cleaning roller; 310a-21, second pulley; 320, feeding assembly; 320a, rotating roller; 320a-1, track wheel; 320b, pulley group. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0044] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0045] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0046] The present invention provides a metal cover plate forming mold and method for a lithium battery cell shell, which replace the traditional mold and method for forming the metal cover plate of the lithium battery cell shell, avoiding the problem of insufficient efficiency of the molds used for metal cover plates of different specifications and sizes during the molding process of the metal cover plate of the lithium battery cell shell.

[0047] Figure 1-Figure 8 The structure diagram of the metal cover plate forming mold for the lithium battery cell shell of the present invention is shown in FIG. Figure 1-Figure 8A detailed introduction is given to the metal cover plate forming mold for the lithium battery cell shell.

[0048] Example 1

[0049] refer to Figure 1-Figure 8 The present invention discloses a metal cover plate forming mold for a lithium battery cell shell, the main body of which includes a supporting mechanism 100, a mold mechanism 200 and a feeding mechanism 300.

[0050] refer to Figure 1-Figure 4 The support mechanism 100 is used to support and install the mold mechanism 200 and the feeding mechanism 300. The support mechanism 100 includes a support frame 110 and a driving member 120 installed on the support frame 110. The support frame 110 is used to support and install the mold mechanism 200 and the feeding mechanism 300. The driving member 120 is used to drive the forming punch 220 to move up and down during operation;

[0051] refer to Figure 1-Figure 4 The mold mechanism 200 is used to shape the cut metal plate, so as to cooperate with the driving member 120 to obtain a formed metal cover plate. The mold mechanism 200 includes a mold base 210 installed on the support frame 110 and having a mold groove 210a on the top, and a forming convex mold 220 connected to the output end of the driving member 120 and corresponding to the mold groove 210a. The mold base 210 and the mold groove 210a are used to shape the metal plate punched into the mold groove 210a to obtain the corresponding metal cover plate of the lithium battery cell shell. The forming convex mold 220 is used to punch the metal plate into the mold groove 210a when moving downward, and then cooperate with the mold groove 210a to obtain a formed metal cover plate, wherein the forming convex mold 220 has a first state of contraction when not punching and a state of stretching to all sides during punching and tightly squeezing the cut metal plate. In the second state of the inner wall of the die groove 210a, when the driving member 120 starts to work and drives the forming punch 220 to move down to punch the die and punch the metal plate into the die groove 210a, the forming punch 220 automatically switches from the first state to the second state, so that when the driving member 120 does not drive the forming punch 220 to move downward to punch the die, the forming punch 220 is in the first state of original contraction, and when the driving member 120 works to drive the forming punch 220 to move down to punch the metal plate into the die groove 210a, as the driving member 120 continues to work, the forming punch 220 automatically switches to the second state of stretching in all directions until the bending parts of the metal plate punched into the die groove 210a are squeezed to fit tightly to the inner wall of the die groove 210a, thereby obtaining a formed metal cover plate corresponding to the die groove 210a;

[0052] refer to Figure 3 and Figure 8The feeding mechanism 300 is used to automatically start working and convey the cut metal plate to the position of the die when the driving member 120 works to drive the forming punch 220 to move downward for punching. The feeding mechanism 300 is installed on the die base 210. When the driving member 120 works to drive the forming punch 220 to move downward for punching, the feeding mechanism 300 is automatically driven to start working and convey the cut metal plate to the position corresponding to the die groove 210a and the forming punch 220. When the driving member 120 works to drive the forming punch 220 to move downward for punching, the feeding mechanism 300 is automatically driven to start working and convey the cut metal plate to the position corresponding to the die groove 210a and the forming punch 220. Therefore, when the driving member 120 works to drive the forming punch 220 to descend, the feeding mechanism 300 automatically starts working and conveys the cut metal plate to the position corresponding to the die groove 210a and the forming punch 220, so as to facilitate the forming punch 220 to punch the metal plate into the die groove 210a.

[0053] In this embodiment, the present invention further discloses a method for forming a metal cover plate of a lithium battery cell shell, which includes the above-mentioned metal cover plate forming mold of the lithium battery cell shell.

[0054] In this embodiment, the specific usage process is as follows: when stamping the metal cover of the lithium battery cell shell, the driving member 120 starts to work and drives the forming punch 220 to move downward. At this time, the forming punch 220 is in the first state of contraction. At the same time, the feeding mechanism 300 starts to work and transports the cut metal plate to the position corresponding to the forming punch 220 and the die groove 210a. As the forming punch 220 continues to descend, the metal plate is punched into the die groove 210a by the forming punch 220. At this time, the four sides of the metal plate are bent by the side walls of the die groove 210a. As the driving member 120 continues to work, the forming punch 220 switches to the second state of stretching to the four sides until the four side walls of the metal plate are tightly squeezed against the inner wall of the die groove 210a, and finally a formed metal cover of the lithium battery cell shell is obtained.

[0055] Example 2

[0056] Based on Example 1, Figure 3 The support frame 110 includes a base 110a with a fixing groove 110a-1 on the top and a plurality of clamping members 110a-2 around the inner wall of the fixing groove 110a-1, and a mounting frame 110b installed on the side wall of the base 110a. The fixing groove 110a-1 on the base 110a is used to facilitate the placement of the mold base 210. The plurality of clamping members 110a-2 are used to clamp and fix the mold base 210 in the fixing groove 110a-1, thereby maintaining stability during punching. The mounting frame 110b is used to facilitate the installation of the driving member 120 and the forming punch 220.

[0057] In this embodiment, reference Figure 5-Figure 7The forming convex die 220 includes a connecting seat 220a connected to the output end of the driving member 120 at the top, a bottom plate 220b connected to the bottom of the connecting seat 220a, an extension member 220c movably mounted around the bottom plate 220b, and a first transmission member 220d connected to the connecting seat 220a at one end and connected to the extension member 220c at the other end. The connecting seat 220a is used to facilitate the connection between the driving member 120 and the bottom plate 220b, and the bottom plate 220b is used to align the bottom plate 220b with the driving member 120 during the die punching process. The top surface of the cut metal plate is extruded, and the stretching member 220c is used to extrude the bent parts around the metal plate after stretching, so as to extrude it to a position that fits the inner walls around the die groove 210a. The first transmission member 220d is used when the connecting seat 220a descends and drives the bottom plate 220b to descend. As the bottom plate 220b contacts the metal plate and the bottom plate 220b remains fixed, the continuous descent of the connecting seat 220a drives the stretching member 220c to start working and stretch around.

[0058] In this embodiment, even the reference Figure 7 The bottom of the connection seat is provided with a connection tube 220a-1 with multiple limiting holes uniformly arranged on the outer wall. The connection tube 220a-1 is used to cooperate with the connection column 220b-2 to maintain the movable connection between the connection seat 220a and the bottom plate 220b. The limiting holes are used to cooperate with the elastic protrusions, so that before the bottom of the bottom plate 220b squeezes the metal bar to the bottom of the inner wall of the die groove 210a, the relative position between the bottom plate 220b and the connection seat 220a remains unchanged, and when the bottom plate 220b moves to squeeze the metal plate to contact the bottom of the inner wall of the die groove 210a, as the connection seat 220a continues to descend, the extrusion driving force received by the elastic protrusion becomes larger and then shrinks in turn to cooperate with the multiple limiting holes, so that the connection seat 220a continues to descend to drive the extension member 220c to work;

[0059] refer to Figure 7 The top of the bottom plate 220b is provided with a connecting column 220b-2 corresponding to the connecting cylinder 220a-1 and having an elastic protrusion on the outer wall, which is used to connect with the connecting cylinder 220a-1. The side walls around the bottom plate 220b are provided with a limiting groove 220b-1 for cooperating with the limiting rod 220c3, so that when the rotating disk 220d-1 rotates, the driving side plate 220c1 and the limiting rod 220c3 move linearly along the limiting groove 220b-1;

[0060] refer to Figure 7The extending member 220c includes a side plate 220c1, a first limiting slide bar 220c2 installed on one side of the side plate 220c1 through a connecting rod, and a limiting rod 220c3 located on the side wall of the side plate 220c1 and corresponding to the limiting groove 220b-1. The side plate 220c1 is used to bend and extrude the metal plate in the mold groove 210a on all sides after extension, the limiting rod 220c3 is used to cooperate with the limiting groove 220b-1, and the first limiting slide bar 220c2 is used to cooperate with the arc-shaped limiting slide groove 220d-11.

[0061] In this embodiment, a thread groove (not shown) is provided at the bottom of the connecting seat 220a for cooperating with the first threaded rod 220d-2, so that when the connecting seat 220a moves up and down, when the first threaded rod 220d-2 extends to the thread groove, the rotating disk 220d-1 is driven to rotate;

[0062] refer to Figure 7 The first transmission member 220d includes a turntable 220d-1 rotatably mounted on the top of the bottom plate 220b and having an arc-shaped limiting sliding groove 220d-11 on the top, and a first threaded rod 220d-2 located on the top of the turntable 220d-1 and corresponding to the threaded groove, wherein the first limiting sliding rod 220c2 extends into the arc-shaped limiting sliding groove 220d-11, and the turntable 220d-1 is used to drive the side plate 220c1 in the limiting groove 220b when rotating. -1 and the limiting rod 220c3, the arc-shaped limiting groove 220d-11 and the first limiting slide rod 220c2, it moves linearly along the direction of the limiting rod 220c3 and the limiting groove 220b-1, the arc-shaped limiting groove 220d-11 is used to cooperate with the first limiting slide rod 220c2, and the first threaded rod 220d-2 is used to cooperate with the thread groove, thereby driving the thread groove to rotate when the connecting seat 220a moves up and down.

[0063] In this embodiment, the specific working process is as follows: when the driving member 120 is working and drives the connecting seat 220a to descend, the bottom plate 220b starts to move downward while the relative position with the connecting seat 220a remains unchanged under the connection between the limiting hole of the connecting cylinder 220a-1 and the elastic protrusion of the connecting column 220b-2, until the bottom plate 220b squeezes the surface of the metal plate to contact the bottom of the inner wall of the die groove 210a. At this time, the bottom plate 220b can no longer descend. As the driving member 120 continues to drive the connecting seat 220a to descend, the first thread Rod 220d-2 contacts the threaded groove, thereby driving the turntable 220d-1 to start rotating. After the turntable 220d-1 rotates, under the limiting action of the first limiting slide bar 220c2 and the arc-shaped limiting slide groove 220d-11, the limiting groove 220b-1 and the limiting rod 220c3, the side plate 220c1 extends in all directions, squeezing and expanding the bending parts of the metal plate in all directions until the side plates 220c1 of the metal plate are tightly fitted around the inner walls of the mold groove 210a, thereby completing the forming of the metal cover plate of corresponding specifications and dimensions.

[0064] Example 3

[0065] Based on Example 2, Figure 1-Figure 8 The feeding mechanism 300 includes a fixing frame 310 having a positioning groove 310a on one side of the top and a feeding assembly 320 installed on one side of the fixing frame 310 and transmission-connected to the connecting seat 220a. The fixing frame 310 is used to facilitate the installation of the feeding assembly 320, and the positioning groove 310a is used to position the cut metal plate to be punched, so as to maintain the accuracy of the position during punching.

[0066] In this embodiment, reference Figure 8 The inner wall of the positioning groove 310a is provided with a through groove 310a-1 corresponding to the feeding assembly 320, which is used to transport the cut metal sheet along the through groove 310a-1 to the positioning groove 310a when the multiple rollers 320a rotate;

[0067] refer to Figure 8 The side wall of the mounting frame 110b is provided with a first pulley 110b-1, which is used to drive the pulley set 320b to rotate when rotating, and the side wall of the first pulley 110b-1 is provided with a driving gear 110b-11, which is used to drive the first pulley 110b-1 to rotate when rotating;

[0068] refer to Figure 5 The side wall of the connecting seat 220a is provided with a sawtooth plate 220a-2 corresponding to the driving gear 110b-11 through a connecting rod, which is used to drive the driving gear 110b-11 to rotate when moving up and down;

[0069] refer to Figure 8The loading assembly 320 includes a plurality of rollers 320a installed on one side of the fixed frame 310 and the side walls of which are connected to track wheels 320a-1 through a rotating shaft, and a pulley group 320b connected to one of the track wheels 320a-1 and connected to the first pulley 110b-1 through a belt, wherein the plurality of track wheels 320a-1 are connected through tracks, and the plurality of rollers 320a are used to drive the cut metal plates located on the top thereof to move into the positioning groove 310a when rotating, and the pulley group 320b is used to rotate the pulleys when rotating, thereby driving the plurality of rollers 320a to rotate.

[0070] In this embodiment, the specific working process is as follows: when the driving member 120 works to drive the connecting seat 220a to descend, the movement of the serrated plate 220a-2 drives the transmission gear to rotate, and when the transmission gear rotates, it drives the first pulley 110b-1 to rotate, and when the first pulley 110b-1 rotates, it drives the pulley group 320b to rotate, and when the pulley group 320b rotates, it drives multiple track wheels 320a-1 to rotate, thereby driving multiple rollers 320a to rotate, and then the cut metal plates placed on the multiple rollers 320a are transmitted to the positioning groove 310a through the through groove 310a-1, so as to be used for subsequent stamping and forming.

[0071] Example 4

[0072] On the basis of Example 3, in order to prevent metal debris from remaining on the surface of the cut metal plate, so that during stamping, the debris is embedded in the surface of the metal plate after stamping and affects the quality of the metal cover plate, reference is made to Figure 8 A cleaning roller 310a-2 with a cleaning brush on the outer wall is provided in the through groove 310a-1, which is used to scrape off impurities on the surface of the metal plate that enters the positioning groove 310a through the through groove 310a-1 when rotating. A second pulley 310a-21 connected to the pulley group 320b through a belt is provided on the side wall of the cleaning roller 310a-2, which is used to drive the cleaning roller 310a-2 to rotate when rotating.

[0073] In this embodiment, the specific working process is as follows: when the feeding mechanism 300 is working, the rotation of the pulley group 320b drives the second pulley 310a-21 to rotate, and the rotation of the second pulley 310a-21 drives the cleaning roller 310a-2 to rotate. During the rotation of the cleaning roller 310a-2, metal debris and other impurities on the surface of the metal plate that enters the positioning groove 310a through the through groove 310a-1 are scraped off.

[0074] Example 5

[0075] On the basis of Example 4, in order to facilitate the automatic demoulding of the metal cover plate formed in the die groove 210a after the die is punched, Figure 1-Figure 4, movable plates 210a-1 are provided on both sides of the inner wall of the die groove 210a, which are used to limit the bending of the two sides of the metal cover plate to be formed during the die punching process. A second transmission member 210a-2 is provided in the die groove 210a, one end of which is transmission-connected to the two movable plates 210a-1 and the other end of which is transmission-connected to the pulley group 320b, and is used to drive the two movable plates 210a-1 to move closer to or away from each other when the pulley group 320b rotates;

[0076] refer to Figure 4 The second transmission member 210a-2 includes two second limiting slide bars 210a-21 located on the inner wall of the mold groove 210a, two second threaded rods 210a-22 located on the inner wall of the mold groove 210a, and two bevel gear sets 210a-23 connected to the second threaded rod 210a-22 through a rotating shaft at one end and having a third pulley 210a-231 at the other end. The second limiting slide bar 210a-21 is used to limit the movable plate 210a-1, so as to prevent the second threaded rod 210a-22 from driving the movable plate 210a-1 to rotate synchronously when the second threaded rod 210a-22 rotates. The two second threaded rods 210a-22 are used to drive the two movable plates 210a-1 to rotate. Under the limiting action of the two limit slide rods 210a-21, they move closer to or farther away from each other along the second threaded rod 210a-22. The bevel gear set 210a-23 is used to drive the second threaded rod 210a-22 to rotate when it rotates. The third pulley 210a-231 is used to drive the bevel gear set 210a-23 to rotate when it rotates. The two third pulleys 210a-231 are connected by belts and one of the third pulleys 210a-231 is connected to the pulley set 320b by a belt. One end of the movable plate 210a-1 is slidably sleeved on the second limit slide rod 210a-21 and the other end is threadedly sleeved on the second threaded rod 210a-22.

[0077] In this embodiment, the specific steps are as follows: when the driving member 120 works to drive the forming punch 220 to descend for punching, as the pulley group 320b rotates, the third pulley 210a-231 is driven to rotate, thereby driving the bevel gear group 210a-23 to rotate and then driving the two second threaded rods 210a-22 to rotate, and the two movable plates 210a-1 approach each other until they move to the point where the threaded portion of the movable plate 210a-1 and the second threaded rod 210a-22 are separated and stop. At this time, the two movable plates 210a-1 are used to limit the bending part of the side wall of the metal plate squeezed by the extended side plate 220c1, so that the corresponding metal cover plate is obtained after it is formed. After the punching is completed, the driving member 120 works to drive the entire forming punch 22 0 rises. At this time, due to the limiting effect of the elastic protrusion and the limiting hole, the relative position between the bottom plate 220b and the connecting seat 220a remains unchanged, so that the extending member 220c still remains in the extended state at this time. As the serrated plate 220a-2 rises, the pulley group 320b, the third pulley 210a-231 and the bevel gear group 210a-23 flip over, and the second threaded rod 210a-22 reverses and drives the two movable rods away from each other, so that the outer sides of the two side walls of the formed metal cover plate are loosened, and the inner walls are supported by the unfolded side plates 220c1. As the forming punch 220 rises, the formed metal cover plate is clamped out of the die groove 210a, so that the formed metal cover plate is automatically separated from the die groove 210a to complete demoulding.

[0078] A method for forming a metal cover plate for a lithium battery cell shell, comprising the above metal cover plate forming mold for a lithium battery cell shell, and the specific steps are as follows:

[0079] S1. Place the cut metal sheet on the loading assembly 320. When stamping the metal sheet, the driving member 120 drives the forming punch 220 to move downward.

[0080] S2, when the forming punch 220 moves downward, the feeding assembly 320 is driven to work and convey the metal plate into the positioning groove 310a. During this process, the impurities on the surface of the metal plate body are scraped off by the rotating cleaning roller 310a-2. At the same time, the two movable plates 210a-1 approach each other;

[0081] S3, when the forming punch 220 is in the process of descending, the metal plate is pressed into the die groove 210a by the forming punch 220, and as the driving member 120 continues to work, the forming punch 220 switches from the first state to the second state, and the extended forming punch 220 tightly presses the bent part of the metal plate against the inner wall of the die groove 210a, until the forming punch 220 can no longer be extended, and the metal cover plate of the lithium battery cell shell is formed in the die groove 210a;

[0082] S4. When the driving member 120 drives the forming punch 220 to rise, the two movable plates 210a-1 in the mold groove 210a move away from each other, and since the relative positions of the bottom plate 220b and the connecting seat 220a remain unchanged at the left and right lower limits of the limiting holes and the elastic protrusions, the extended forming punch 220 still supports the four sides of the formed metal cover plate, so that as the forming punch 220 rises, the metal cover plate of the battery cell shell formed in the mold groove 210a is brought out of the mold groove 210a, completing automatic demolding.

[0083] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A metal cover plate forming die for a lithium battery cell shell, characterized in that: include: A support mechanism (100) comprising a support frame (110) and a driving member (120) mounted on the support frame (110); A mold mechanism (200), comprising a mold base (210) mounted on the support frame (110) and having a mold groove (210a) on the top thereof, and a forming convex mold (220) connected to the output end of the driving member (120) and corresponding to the mold groove (210a), wherein the forming convex mold (220) has a first state in which it is contracted when not punching the mold, and a second state in which it is extended in all directions during punching and the cut metal plate is tightly pressed against the inner wall of the mold groove (210a), wherein when the driving member (120) starts to work and drives the forming convex mold (220) to descend the mold and punch the metal plate into the mold groove (210a), the forming convex mold (220) automatically switches from the first state to the second state; A feeding mechanism (300) is installed on the die base (210), wherein when the driving member (120) works to drive the forming punch (220) to move downward for punching, the feeding mechanism (300) is automatically driven to start working and transport the cut metal plate to a position corresponding to the die groove (210a) and the forming punch (220).

2. A metal cover plate forming die for a lithium battery cell shell according to claim 1, characterized in that: The support frame (110) comprises a base (110a) having a fixing groove (110a-1) at the top and a plurality of clamping members (110a-2) around the inner wall of the fixing groove (110a-1), and a mounting frame (110b) mounted on the side wall of the base (110a).

3. A metal cover plate forming die for a lithium battery cell shell according to claim 2, characterized in that: The forming convex die (220) comprises a connecting seat (220a) having a top connected to the output end of the driving member (120), a bottom plate (220b) drivingly connected to the bottom of the connecting seat (220a), an extension member (220c) movably mounted around the bottom plate (220b), and a first transmission member (220d) having one end drivingly connected to the connecting seat (220a) and the other end drivingly connected to the extension member (220c).

4. A metal cover plate forming die for a lithium battery cell shell according to claim 3, characterized in that: The bottom of the connecting seat (220a) is provided with a connecting tube (220a-1) whose outer wall is uniformly provided with a plurality of limiting holes; The top of the bottom plate (220b) is provided with a connecting column (220b-2) corresponding to the connecting tube (220a-1) and having an outer wall with an elastic protrusion, and the side walls around the bottom plate (220b) are provided with limiting grooves (220b-1); The extending member (220c) comprises a side plate (220c1), a first limiting sliding rod (220c2) installed on one side of the side plate (220c1) via a connecting rod, and a limiting rod (220c3) located on the side wall of the side plate (220c1) and corresponding to the limiting groove (220b-1).

5. A metal cover plate forming die for a lithium battery cell shell according to claim 4, characterized in that: A threaded groove is formed at the bottom of the connecting seat (220a); The first transmission member (220d) comprises a turntable (220d-1) rotatably mounted on the top of the base plate (220b) and having an arc-shaped limiting sliding groove (220d-11) on the top, and a first threaded rod (220d-2) located on the top of the turntable (220d-1) and corresponding to the threaded groove, wherein the first limiting sliding rod (220c2) extends into the arc-shaped limiting sliding groove (220d-11).

6. The metal cover plate forming die for a lithium battery cell shell according to claim 3, characterized in that: The feeding mechanism (300) comprises a fixing frame (310) having a positioning groove (310a) on one side of the top, and a feeding assembly (320) installed on one side of the fixing frame (310) and drivingly connected to the connecting seat (220a).

7. A metal cover plate forming die for a lithium battery cell shell according to claim 6, characterized in that: The inner wall of the positioning groove (310a) is provided with a through groove (310a-1) corresponding to the loading assembly (320); A first belt pulley (110b-1) is installed on the side wall of the mounting frame (110b), and a driving gear (110b-11) is installed on the side wall of the first belt pulley (110b-1); The side wall of the connecting seat (220a) is provided with a sawtooth plate (220a-2) corresponding to the driving gear (110b-11) via a connecting rod; The loading assembly (320) comprises a plurality of rotating rollers (320a) mounted on one side of the fixing frame (310) and having side walls connected to track wheels (320a-1) via rotating shafts, and a pulley group (320b) connected to one of the track wheels (320a-1) and connected to the first pulley (110b-1) via a belt, wherein the plurality of track wheels (320a-1) are connected to each other via tracks.

8. The metal cover plate forming die for a lithium battery cell shell according to claim 7, characterized in that: A cleaning roller (310a-2) having an outer wall with a cleaning brush is arranged in the through groove (310a-1), and a second pulley (310a-21) connected to the pulley group (320b) via a belt is arranged on the side wall of the cleaning roller (310a-2).

9. The metal cover plate forming die for a lithium battery cell shell according to claim 7, characterized in that: Both sides of the inner wall of the mold groove (210a) are provided with movable plates (210a-1), and a second transmission member (210a-2) is provided in the mold groove (210a), one end of which is transmission-connected to the two movable plates (210a-1) and the other end of which is transmission-connected to the pulley group (320b); The second transmission member (210a-2) comprises two second limiting sliding rods (210a-21) located on the inner wall of the mold groove (210a), two second threaded rods (210a-22) located on the inner wall of the mold groove (210a), and two bevel gear sets (210a-23) connected to the second threaded rods (210a-22) at one end through a rotating shaft and having a third pulley (210a-231) at the other end, the two third pulleys (210a-231) are connected by a belt and one of the third pulleys (210a-231) is connected to the pulley set (320b) by a belt, one end of the movable plate (210a-1) is slidably sleeved on the second limiting sliding rod (210a-21) and the other end is threadedly sleeved on the second threaded rod (210a-22).

10. A method for forming a metal cover plate for a lithium battery cell shell, comprising the metal cover plate forming mold for a lithium battery cell shell according to claims 1 to 9, and the specific steps are as follows: S1, placing the cut metal plate on the loading assembly (320), and when stamping the metal plate, the driving member (120) drives the forming punch (220) to move downward; S2, when the forming punch (220) moves downward, the feeding assembly (320) is driven to work and convey the metal plate into the positioning groove (310a). During this process, impurities on the surface of the metal plate body are scraped away by the rotating cleaning roller (310a-2). At the same time, the two movable plates (210a-1) approach each other; S3, when the forming convex die (220) is in the process of descending, the metal plate is pressed into the die groove (210a) by the forming convex die (220), and as the driving member (120) continues to work, the forming convex die (220) switches from the first state to the second state, and the extended forming convex die (220) tightly presses the bent part of the metal plate against the inner wall of the die groove (210a), until the forming convex die (220) can no longer be extended, and a metal cover plate of the lithium battery cell shell is formed in the die groove (210a); S4. When the driving member (120) drives the forming convex mold (220) to rise, the two movable plates (210a-1) in the die groove (210a) move away from each other, and because the relative positions of the bottom plate (220b) and the connecting seat (220a) remain unchanged at the left and right lower limits of the limiting holes and the elastic protrusions, the extended forming convex mold (220) still supports the surroundings of the formed metal cover plate, so that as the forming convex mold (220) rises, the metal cover plate of the battery cell shell formed in the die groove (210a) is brought out of the die groove (210a), completing automatic demoulding.

Images