CN114453494A

CN114453494A - Edge cutting system and edge cutting process for battery shell

Info

Publication number: CN114453494A
Application number: CN202210056918.2A
Authority: CN
Inventors: 李贵高
Original assignee: Yuanbo Intelligent Technology Co ltd
Current assignee: Yuanbo Intelligent Technology Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-05-10
Anticipated expiration: 2042-01-18
Also published as: CN114453494B

Abstract

The application relates to the technical field of battery processing, in particular to an edge cutting system and an edge cutting process for a battery shell, which comprise a rack, a first edge cutting device, a second edge cutting device and two groups of edge cutting vertical pressing devices, wherein the first edge cutting device comprises a first movable cutter, a first fixed cutter, a first lifting assembly and a first driving assembly, the first movable cutter is provided with a first limiting through cavity, and the first movable cutter is matched with the first fixed cutter to form a shearing opening; the second edge cutting device comprises a second movable knife, a second fixed knife and a second driving component, and the moving direction of the second movable knife is vertical to that of the first movable knife; the edge cutting vertical pressing device comprises a pressing assembly and a vertical driving mechanism, wherein the pressing assembly comprises a pressing base plate, a pressing piece and an elastic restoring piece; the sliding direction of the pressing piece above the first edge cutting device is parallel to the moving direction of the first movable knife, and the sliding direction of the pressing piece above the second edge cutting device is parallel to the moving direction of the second movable knife. The application can keep the good molding quality of the final battery shell.

Description

Edge cutting system and edge cutting process for battery shell

Technical Field

The application relates to the technical field of battery processing, in particular to a trimming system and a trimming process for a battery shell.

Background

The power battery is a power source capable of providing a power source for the tool, and the battery shell is an important component of the power battery and can play a role in containing and protecting internal components. Referring to fig. 1, a battery shell in the market is generally rectangular, and an opening called a mouth is formed at one end of the battery shell for placing internal components of a power battery; the other end of the battery shell can be called as the bottom and can be used for abutting and limiting internal parts of the power battery. And after the internal components are loaded, welding and fixing the internal components and an end cover, and then packaging the power battery.

The battery shell is usually obtained through a stretching process, and after stretching, an irregular edge is left at the opening part of the battery shell; in order to regulate the mouth of the battery case, it is also generally necessary to trim the mouth of the battery case. In the conventional technology, a squeezing and cutting device is usually used to squeeze and cut the edge of the mouth of the battery shell, which may cause the thinning of the mouth of the battery shell due to squeezing, and affect the molding quality of the final battery shell.

Disclosure of Invention

In order to maintain good forming quality of a battery shell finished product, the application provides an edge cutting system and an edge cutting process for the battery shell.

The application provides a side cut system and side cut technology for battery case adopts following technical scheme:

a trimming system and trimming process for a battery case, comprising:

the device comprises a frame, a positioning device and a control device, wherein the frame is provided with a workbench;

the first edge cutting device is arranged on the workbench; the first edge cutting device comprises a first movable cutter, a first fixed cutter, a first lifting assembly and a first driving assembly for driving the first movable cutter to move, the first movable cutter is provided with a first limiting through cavity for accommodating the battery shell, the lower surface of the first movable cutter is matched with the upper surface of the first fixed cutter to form a shearing opening, and the first lifting assembly is used for driving the battery shell to move upwards and separate from the first limiting through cavity;

the second edge cutting device is arranged on the workbench; the second trimming device comprises a second movable knife, a second fixed knife, a second lifting assembly and a second driving assembly for driving the second movable knife to move, and the moving direction of the second movable knife is perpendicular to the moving direction of the first movable knife;

the two groups of edge cutting vertical pressing devices are arranged above the first edge cutting device and the second edge cutting device in a one-to-one correspondence manner; the edge cutting vertical pressing device comprises a pressing component and a vertical driving mechanism for driving the pressing component to move vertically, wherein the pressing component comprises a pressing base plate connected to the driving end of the vertical driving mechanism, a pressing component connected below the pressing base plate in a sliding manner and an elastic restoring component; the sliding direction of the pressing piece above the first edge cutting device is parallel to the moving direction of the first movable knife, and the sliding direction of the pressing piece above the second edge cutting device is parallel to the moving direction of the second movable knife.

By adopting the technical scheme, the edge of the opening part of the battery shell is cut into two steps, specifically, the edge of the short side of the opening part of the battery shell can be cut firstly, and then the edge of the long side can be cut; meanwhile, in the process of actually cutting the edge, the edge is cut by the cutting openings formed between the first movable knife and the first fixed knife and between the second movable knife and the second fixed knife, and compared with extrusion cutting, the situation that the opening part of the battery shell is thinned due to extrusion of the shell wall of the battery shell can be reduced. In addition, in the process of edge shearing, the battery shell is likely to be warped due to shearing force, in the scheme, the vertical height of the battery shell can be limited by adopting the edge-cutting vertical-pressing device, and the condition of uneven shearing caused by upward movement of the battery shell under stress is reduced; in addition, in the actual shearing process, the battery shell can move along with the first movable knife or the second movable knife, and correspondingly, the pressing piece pressed against the battery shell can also move along with the first movable knife or the second movable knife, so that the position deviation of the battery shell due to horizontal friction can be reduced, and the good forming quality of the final battery shell is maintained.

Optionally, the vertical driving mechanism includes a vertical driving assembly and a pressure spring, the driving end of the vertical driving assembly is connected to a connecting plate, the connecting plate is connected to the pressure base plate through a vertical sliding column, the pressure spring is sleeved on the vertical sliding column, the upper end of the pressure spring abuts against the connecting plate, and the lower end of the pressure spring abuts against the pressure base plate.

By adopting the technical scheme, in the actual shearing process, the vertical pressure applied to the battery shell is the elastic force of the pressure applying spring, so that on one hand, the buffer effect can be achieved in the pressure applying process, and the damage caused by the rigid collision with the battery shell is reduced; on the other hand, because the applied pressure is elastic force, the pressing effect on the battery shell can be effectively realized, and the situation that the battery shell is stressed and deformed due to excessive application of force is not easy to occur.

Optionally, the first lifting assembly includes a first lifting member and a first lifting driving member for driving the lifting plate to move vertically, the first lifting member is used for the inner wall of the bottom of the battery case to press against, and the first lifting member has a lifting position and a reference position relative to the first positioning tool; when the first lifting piece is in the jacking position, the battery shell sleeved on the first lifting piece is in a state of being completely separated from the first limiting through cavity; when the first lifting piece is at the reference position, the battery shell sleeved on the first lifting piece is at the sheared height.

Through adopting above-mentioned technical scheme, when carrying out the first shearing, use battery case bottom inner wall as the benchmark, inject battery case's height by first lifting piece to confirm the shearing height of battery case when being sheared by the first time, be convenient for keep the uniformity of shearing height.

Optionally, an end edge of the battery case cut by the first trimming device is referred to as a first end edge, the second fixed knife is provided with a reference surface for the first end edge to press, and when the first end edge of the battery case abuts against the reference surface, the battery case is at a cut height.

By adopting the technical scheme, the battery shell obtains the flat first end edge after being sheared for the first time, when the battery shell is sheared for the second time, the height of the battery shell can be limited by the matching of the second end edge and the reference surface on the second fixed cutter, so that the shearing height of the battery shell when the battery shell is sheared for the second time is determined, the determination of the shearing height when the battery shell is sheared for the second time is determined based on the first shearing result, and the consistency of the two shearing positions of the battery shell is maintained.

Optionally, the battery case further comprises two sets of case leveling devices connected to the frame and used for leveling the side walls of the battery case, wherein one set of case leveling device is located on one side of the first edge cutting device, which is away from the second edge cutting device, and the other set of case leveling device is located on one side of the second edge cutting device, which is away from the first edge cutting device.

By adopting the technical scheme, before the battery shell is sheared for the first time, the shell wall of the battery shell is leveled by the shell leveling device, so that the situation that the shell wall of the battery shell is deformed to cause shearing deflection can be reduced; meanwhile, after the battery shell is sheared, the shell wall of the battery shell is leveled by the shell leveling device, so that the final forming quality of the final battery shell is higher, and the follow-up detection of the size of the sheared battery shell is more accurate.

Optionally, the reciprocating feeding device is connected to the frame and used for driving the battery shell to move equidistantly along the production process, and the reciprocating feeding device comprises a clamping mechanism for clamping the battery shell and a distance driving mechanism for driving the clamping mechanism to move at a certain distance.

Through adopting above-mentioned technical scheme, among the actual process, can simply think that the processing procedure that battery case body passed through includes flattening for the first time, shearing for the second time and flattening for the second time in proper order, if carry out the distance through reciprocal material feeding unit with battery case body and carry, can correspondingly reduce the setting of power supply.

Optionally, the battery case flattening device further comprises a turnover feeding device connected to the frame, and the turnover feeding device is used for turning the battery case to a case flattening device with a mouth facing downwards and moving to one side of the first trimming device.

Through adopting above-mentioned technical scheme, in the process of shearing and flattening, battery case all is the vertical downward form of oral area, and the battery case that actually is carried and comes then is oral area level form usually, therefore can adopt upset loading attachment to overturn and the material loading with battery case.

In a second aspect, the present application provides a trimming process for a battery case in order to maintain good molding quality of the battery case finished product.

The application provides a side cut technology for battery case adopts following technical scheme:

the edge cutting process for the battery shell is applied to the edge cutting system for the battery shell, and comprises the following steps of:

s01, preparing a battery shell;

s02, placing the battery shell in a first limiting through cavity of the first movable blade, and determining a first shearing height of the battery shell by taking the inner wall of the bottom of the battery shell as a reference;

s03, performing primary shearing on the two first edges of the opening of the battery shell to obtain two flat first end edges; the two first edges are correspondingly positioned on the two opposite side walls of the opening part of the battery shell one by one;

s04, placing the battery shell in a second limiting through cavity of the second movable blade, and determining a second shearing height of the battery shell by taking the end face of the first end edge as a reference;

s05, performing secondary shearing on the two second edges of the opening part of the battery shell to obtain two flat second end edges; the two second edges are correspondingly arranged on two opposite side walls of the opening part of the battery shell one by one, and the side wall where the second edge is arranged is vertical to the side wall where the first edge is arranged;

and S06, transferring the battery shell to blanking.

By adopting the technical scheme, the determination of the shearing height during the second shearing is determined based on the first shearing result, so that the consistency of the two shearing positions of the battery shell is convenient to maintain, and the condition that the molding quality of the battery shell is reduced due to the inconsistent shearing positions is reduced.

Optionally, in step S03, the method specifically includes:

s031, applying a vertical pressure to the battery shell by using an edge cutting vertical pressure device, driving the first movable knife to drive the battery shell to move along a first direction relative to the first fixed knife so as to cut a first edge of the opening of the battery shell for the first time, and obtaining a flat first end edge;

s032, relieving the vertical pressure applied to the battery shell by the trimming vertical pressing device, and driving the first movable knife to drive the battery shell to move along a second direction relative to the first fixed knife; wherein the first direction and the second direction are parallel and opposite;

and S033, after the first end edge obtained in the step S031 is suspended, applying vertical pressure to the battery shell, and driving the first movable knife to drive the battery shell to move relative to the first fixed knife continuously along the second direction so as to perform first shearing on the other first edge of the opening part of the battery shell, so as to obtain the other flat first end edge.

By adopting the technical scheme, the pressure is applied to the battery shell in the first shearing process, so that the condition that the shearing flatness is influenced by the upward movement of the battery shell due to the shearing force can be reduced; meanwhile, after the first edge is sheared for the first time to form the first end edge, the whole battery shell is moved back after the vertical pressure is relieved, the situation that the first end edge is scratched hard on the end face can be reduced, and the positioning accuracy with the first end edge as the reference during the second shearing is maintained.

Optionally, in step S02, the first lifting member supports the inner wall of the bottom of the battery case, and a first shearing height is determined; in step S04, the first edge is supported by the reference surface of the second stationary blade, and a second shearing height is determined.

By adopting the technical scheme, the corresponding first shearing height and the second shearing height can be determined, and the determination of the shearing height during the second shearing is determined based on the first shearing result, so that the consistency of the two shearing positions of the battery shell is maintained.

In summary, the present application includes at least one of the following beneficial technical effects:

the condition of uneven shearing caused by upward movement of the battery shell under stress can be reduced, and the position deviation of the battery shell due to horizontal friction can be reduced, so that the excellent forming quality of the final battery shell is maintained;

the pressure exerted on the battery shell is elastic force, so that the battery shell can be effectively compressed, and the situation that the battery shell is stressed and deformed due to excessive force application is not easy to occur;

at the time of the second shearing, the height of the battery shell can be defined by utilizing the matching of the second end edge and the reference surface on the second fixed cutter so as to determine the shearing height of the battery shell at the time of the second shearing, and the determination of the shearing height at the time of the second shearing is determined based on the first shearing result so as to maintain the consistency of the two shearing positions of the battery shell.

Drawings

FIG. 1 is an overall schematic view of a trimming system in an embodiment of the present application;

FIG. 2 is a schematic elevation view of a trimming system in an embodiment of the present application;

FIG. 3 is a general schematic view of a housing flattening apparatus in an embodiment of the subject application;

FIG. 4 is a schematic overall view of a first slitting device according to an embodiment of the present application;

FIG. 5 is a cross-sectional view of a first slitting device according to an embodiment of the present application;

FIG. 6 is a general schematic view of the trimming vertical pressing device in the embodiment of the present application;

FIG. 7 is a schematic view of the pressure applying assembly and the vertical drive link in an embodiment of the present application;

FIG. 8 is a schematic view of a second trimming apparatus in an embodiment of the present application;

FIG. 9 is a cross-sectional view of a second moving blade and a second stationary blade in an embodiment of the present application;

FIG. 10 is a schematic view of a reciprocating feed apparatus in an embodiment of the present application;

FIG. 11 is an enlarged schematic view of portion A of FIG. 10;

FIG. 12 is a schematic view of a linkage assembly and a servo motor according to an embodiment of the present application;

FIG. 13 is a schematic illustration of a power assembly in an embodiment of the present application;

FIG. 14 is a schematic illustration of a linkage assembly in an embodiment of the present application;

fig. 15 is an enlarged schematic view of a portion B in fig. 10.

Description of reference numerals: 1. a frame; 11. a feeding conveyer belt; 12. blanking a conveying belt; 13. a work table; 2. turning over the feeding device; 3. a housing leveling device; 31. leveling the groove seat; 32. leveling the side plates; 4. a first trimming device; 41. a first moving blade; 411. a first limiting through cavity; 42. a first stationary knife; 421. a first support plate; 43. a first lift assembly; 431. a first lifting member; 432. a first lifting lever; 44. a first drive assembly; 441. a first seat body; 442. a first motor; 443. a first eccentric disc; 444. a first swing link; 5. a second trimming device; 51. a second moving blade; 511. a second limiting through cavity; 52. a second stationary knife; 53. a second drive assembly; 6. trimming and vertically pressing device; 61. a pressure applying assembly; 611. a pressure applying substrate; 6111. a return seat; 612. applying a pressing piece; 6121. a U-shaped block; 613. an elastic restoring member; 62. a vertical drive assembly; 621. a vertical screw rod module; 622. a vertical transmission rod; 6221. a connecting plate; 623. a vertical drive motor; 63. a pressure applying spring; 7. a reciprocating feeding device; 71. a main sliding frame; 711. a slide bar; 7111. a guide wheel; 712. a sliding member; 72. a clamping member; 73. a clamping drive mechanism; 731. a power assembly; 7311. swinging arms; 7312. a connecting rod; 732. a linkage assembly; 7321. a linkage arm; 73211. a movable groove; 7322. an adjusting arm; 73221. a movable block; 7323. a linkage rod; 733. a servo motor; 74. a reciprocating drive mechanism; 741. a linear screw rod module; 742. driving the main board; 7421. a guide block; 75. a mounting seat; 8. and a flaring device.

Detailed Description

The present application is described in further detail below with reference to figures 1-15.

The embodiment of the application discloses an edge cutting system for a battery shell. Referring to fig. 1 and 2, the trimming system for the battery case includes a frame 1, an overturning and feeding device 2, a case leveling device 3, a first trimming device 4, a second trimming device 5, a trimming vertical pressing device 6, and a reciprocating feeding device 7. Wherein, frame 1 is rectangular form, and fixed mounting has horizontal workstation 13 on the frame 1, and workstation 13 is rectangular plate-like, and the length direction of workstation 13 is unanimous with the length direction of frame 1.

In this embodiment, one end of the frame 1 is provided with a feeding conveyer belt 11, and the other end is provided with a discharging conveyer belt 12; correspondingly, one end of the workbench 13 close to the feeding conveyor belt 11 is a feeding end, and the other end is a discharging end. And, workstation 13 is provided with material loading station, first flattening station, first side cut station, second side cut station, flaring station and second flattening station from material loading end to unloading end in proper order and equidistance.

Correspondingly, the shell leveling devices 3 are divided into two groups, wherein one group of shell leveling devices 3 is positioned at the first leveling station and used for leveling the shell wall of the battery shell before edge cutting; another set of case flattening devices 3 is located at a second flattening station for flattening the trimmed cell case walls. Meanwhile, the first trimming device 4 is installed at a first trimming station and used for trimming the battery shell for the first time; and the second edge cutting device 5 is arranged at the second edge cutting station and is used for performing secondary edge cutting on the battery shell.

In this embodiment, the edges of the two short sides of the battery case can be cut at the first trimming station, and the edges of the two long sides of the battery case can be cut at the second trimming station correspondingly; in another embodiment, the edges of the two long sides of the battery shell can be cut at the first trimming station, and the edges of the two short sides of the battery shell can be cut at the second trimming station correspondingly.

Meanwhile, the edge cutting vertical pressing devices 6 are two groups, and the two groups of edge cutting vertical pressing devices 6 are connected to the rack 1 and are located right above the first edge cutting device 4 and the second edge cutting device 5 in a one-to-one correspondence manner. The edge of the battery can be actually cut, the edge cutting vertical pressure device 6 can be used for applying vertical pressure to the battery shell, and the situation that the shearing flatness is influenced by the position deviation of the battery shell due to the shearing force can be reduced.

The overturning and feeding device 2 is arranged at one end of the frame 1 close to the feeding conveyer belt 11 and is used for picking up, overturning and transferring the battery shell on the feeding conveyer belt 11 to a feeding station; specifically, the battery shell can be positioned at a feeding station after being picked and turned over. In this embodiment, the turning and feeding device 2 may include a picking assembly and a turning assembly, wherein the picking assembly may employ a pneumatic chuck, and the turning assembly may employ a motor to drive; the corresponding structures are all conventional applications in automation equipment, and are not described herein again.

A flaring device 8 is arranged at the flaring station, and the flaring device 8 is used for expanding the opening part of the battery shell; in this embodiment, the flaring device 8 includes a flaring plate capable of extending into the battery case, a pressing plate for pressing against the battery case, and a driving plate for driving the pressing plate to move vertically; the bottom of the flaring plate is formed into an inclined flaring block for flaring the mouth of the battery shell, and the inclined flaring block is used for flaring the mouth of the battery shell under the pressure of the pressing plate, so that the flaring purpose is achieved.

In addition, the feeding station, the first leveling station, the first trimming station, the second trimming station, the flaring station and the second leveling station are all arranged at equal intervals; correspondingly, jacking structures are installed on the first leveling station, the first trimming station, the second trimming station, the flaring station and the second leveling station, and the battery shell is jacked to a height equal to the height of the loading station by the aid of the jacking structures. Meanwhile, the reciprocating feeding device 7 is used for driving the battery shell to move equidistantly along the station arrangement direction and is adapted to the arrangement distance between two adjacent processing stations; and the clamping height of the reciprocating feeding device 7 is adapted to the height of the feeding station.

In the actual manufacturing process of the battery shell, the battery shell is formed through a stretching process, the formed battery shell is in a rectangular shell shape with an opening on one side, and an irregular edge exists at the opening part of the battery shell. Accordingly, the edge cutting system is required to cut off the edge of the opening of the battery shell.

Specifically, in the whole trimming working process, the battery shell is firstly placed on the feeding conveyer belt 11 and is conveyed to a preset feeding position by the feeding conveyer belt 11; then, the battery case at the charging position is clamped by the turnover charging device 2 and turned into a device with a downward opening, and then the battery case with the downward opening is charged into the case leveling device 3 of the first leveling station.

After the shell wall of the battery shell is leveled by the shell leveling device 3, the battery shell is transferred into the first edge cutting device 4, and the edge of the short edge of the opening part of the battery shell is cut and removed by the first edge cutting device 4; after the edge of the short edge of the opening of the battery shell is cut off, the battery shell is transferred to a second edge cutting device 5, and the edge of the long edge of the opening of the battery shell is cut off by the second edge cutting device 5.

After the edges of the long edges of the opening of the battery shell are cut off, transferring the battery shell to a shell leveling device 3 of a second leveling station for leveling; the cut size of the battery shell can be detected, the battery shell with qualified size is transferred to the blanking conveyer belt 12, and the blanking conveyer belt 12 conveys the qualified battery shell to be blanked.

Referring to fig. 3, the casing leveling device 3 is used for pressing and leveling the casing wall of the battery casing, and the battery casing is in a state that the mouth part faces downwards; accordingly, the battery case has a total of five case walls, specifically, one bottom end case, two long-side cases, and two short-side cases. Specifically, the casing leveling device 3 includes a leveling slot seat 31 capable of accommodating the battery casing, a leveling side plate 32 disposed in the leveling slot seat 31, a leveling driving assembly for driving the leveling side plate 32 to move, and a vertical pressing leveling assembly for vertically pressing the bottom end shell.

In one embodiment, there are only two leveling side plates 32, and the two leveling side plates 32 are used to press the two long side shells facing away from the battery case respectively; accordingly, the screed drive assembly is adapted to drive the two screed side plates 32 toward or away from each other.

In another embodiment, there are four leveling side plates 32 in the leveling slot seat 31, wherein two leveling side plates 32 are used for pressing two long side shells facing away from the battery shell, and the other two leveling side plates 32 are used for pressing two short side shells facing away from the battery shell; correspondingly, the flattening drive assembly has two sets ofly, and one of them group flattening drive assembly is used for ordering about wherein two flattening curb plates 32 to support the pressure flattening to the long edge side shell of battery case, and another group flattening drive assembly is used for ordering about two other flattening curb plates 32 to support the pressure flattening to the short edge side shell of battery case.

Meanwhile, the leveling driving assembly may adopt a combination of a motor, an eccentric wheel and a connecting rod 7312, or may also adopt an existing linear driving module such as an air cylinder, a hydraulic cylinder or a linear electric cylinder, and is not specifically limited herein. The vertical pressing and leveling assembly is used for pressing the bottom end shell of the battery shell, in this embodiment, a vertical pressing plate can be combined with a vertical cylinder, and the combination is not limited specifically here.

Referring to fig. 4 and 5, the first edge cutting device 4 is used for cutting the irregular edge at the short side of the mouth part of the battery case; specifically, the first edge cutting device 4 includes a first movable blade 41, a first fixed blade 42, a first lifting assembly 43, and a first driving assembly 44 for driving the first movable blade 41 to move.

Wherein, first move sword 41 and be provided with the first spacing chamber 411 that leads to that can the holding battery case, the upper end and the lower extreme in first spacing chamber 411 all are uncovered form. Correspondingly, a first support plate 421 capable of extending into the first limit through cavity 411 is arranged on the first fixed knife 42; when the battery case is accommodated in the first limiting through cavity 411 of the first movable blade 41, the first support plate 421 can extend into the battery case, so as to reduce the occurrence of excessive deformation of the battery case due to stress during the trimming process.

Specifically, a table surface is formed on the outer wall of the first fixed knife 42, and the lower end surface of the first movable knife 41 is matched with the table surface of the first fixed knife 42 to form a shearing opening; meanwhile, a horizontal gap is formed between the inner side wall of the first movable knife 41 and the extension of the table top of the first fixed knife 42, so that the irregular edge at the short edge of the opening of the battery shell can extend into the horizontal gap.

The first lifting assembly 43 is used for driving the battery shell to be separated from the first limiting through cavity 411 and move upwards to a height matched with the feeding station, in this embodiment, the first lifting assembly 43 is a lifting structure used for lifting the battery shell to a specified height at the first trimming station; meanwhile, when the battery housing is located in the first limiting through cavity 411, the first lifting assembly 43 is used for supporting the inner low wall of the battery housing, and the vertical height of the battery housing can be determined.

Specifically, in the present embodiment, the first lifting assembly 43 includes a first lifting member 431, a first lifting rod 432, and a first lifting cylinder; the first lifting member 431 is in a horizontal plate shape, and the first lifting member 431 is used for pressing against the inner lower wall of the battery shell. The first lifting rod 432 vertically penetrates through the first fixed knife 42 and the first paperboard, and the upper end of the first lifting rod 432 is fixedly connected with the first lifting piece 431; correspondingly, a first lifting cylinder is installed below the first fixed knife 42, and a piston rod of the first lifting cylinder is connected with the first lifting rod 432.

In actual use, the first lifting member 431 can move vertically under the driving action of the first lifting cylinder, and in this embodiment, the first lifting member 431 has a lifting position and a reference position relative to the first fixed knife 42; when the first lifting piece 431 is in the lifting position, the battery shell sleeved on the first lifting piece 431 can be completely separated from the first limiting through cavity 411 and is at a height suitable for the feeding station. When the second lifting member is at the reference position, the battery case sleeved on the first lifting member 431 is accommodated in the first limiting through cavity 411, and the battery case is at the cut height.

The first driving assembly 44 is configured to drive the first movable blade 41 to reciprocate relative to the first fixed blade 42, specifically, the first driving assembly 44 includes a first base 441, a first motor 442 fixedly connected to the first base 441, a first eccentric disc 443 eccentrically sleeved on an output shaft of the first motor 442, and a first swing rod 444 rotatably sleeved on the first eccentric disc 443, and the other end of the first swing rod 444 is hinged to a side wall of the first movable blade 41. In the process of actually driving the first moving blade 41 to move, the first motor 442 drives the first eccentric disc 443 to rotate, and the first oscillating bar 444 drives the first power to move linearly. In the present embodiment, the first motor 422 drives the first eccentric disc 443 to rotate, so that the first movable blade 41 can move back and forth, and if the first movable blade 41 moves forward to cut the edge of one side of the battery case, the first movable blade 41 moves backward to cut the edge of the other side of the battery case.

Referring to fig. 6, the trimming vertical pressing device 6 can vertically press the battery housing in the first limiting through cavity 411, and specifically, the trimming vertical pressing device 6 includes a pressing assembly 61 and a vertical driving assembly 62 for driving the pressing assembly 61 to vertically move. The vertical driving assembly 62 comprises a vertical lead screw module 621, a vertical transmission rod 622 and a vertical driving motor 623; in this embodiment, the vertical screw module 621 includes a base connected to the frame 1, a vertically disposed screw, and a slider sleeved on the screw and connected to the base in a sliding manner.

Correspondingly, the vertical transmission rod 622 is vertically connected to the seat body of the vertical screw rod module 621 in a sliding manner, and the upper end of the vertical transmission rod 622 is fixedly connected with the sliding block of the vertical screw rod module 621; the vertical driving motor 623 is mounted at the upper end of the vertical screw rod module 621, and an output shaft of the vertical driving motor 623 is coaxially fixed with a screw rod in the vertical screw rod module 621. When the vertical driving motor 623 operates, the sliding block in the screw rod can be driven to drive the vertical transmission rod 622 to vertically move.

Referring to fig. 6 and 7, a lower end of the vertical driving rod 622 is bolt-mounted with a connection plate 6221, and a pressing assembly 61 is mounted to a lower end of the connection plate 6221 to be vertically moved by the driving of a vertical driving motor 623. Specifically, the pressing assembly 61 includes a pressing substrate 611, a pressing member 612 slidably connected below the pressing substrate 611, and a resilient restoring member 613. In this embodiment, the pressing base plate 611 and the connecting plate 6221 are connected to each other by a vertical sliding column in a vertically sliding manner, and the pressing spring 63 is sleeved on the vertical sliding column, the upper end of the pressing spring 63 abuts against the connecting plate 6221, and the lower end of the pressing spring abuts against the pressing base plate 611. So that the vertical pressure applied to the battery shell by the pressing assembly 61 is elastic force, and the deformation of the battery shell caused by hard collision can be reduced.

Meanwhile, the pressing member 612 is rectangular plate-shaped, the upper surface of the pressing member 612 is provided with a slide carriage, correspondingly, the lower surface of the pressing substrate 611 is provided with a slide rail matched with the slide carriage, and the sliding connection between the pressing member 612 and the pressing substrate 611 is realized through the sliding connection between the slide rail and the slide carriage. In addition, a return seat 6111 is installed on one side of the pressing substrate 611, the spring restoring piece is two nitrogen springs arranged along the sliding direction of the pressing piece 612, and the two nitrogen springs are respectively installed on two side walls of the return seat 6111 which are deviated from each other; correspondingly, a U-shaped block 6121 is fixed on the pressing member 612, and two vertical parts of the U-shaped block 6121 are used for matching with two nitrogen springs. After the pressing member 612 is horizontally displaced relative to the pressing base plate 611 due to the action of the external force, the U-shaped block 6121 compresses one of the nitrogen springs, and after the external force applied to the pressing member 612 is removed, the compressed nitrogen spring provides a spring restoring force to the U-shaped block 6121, so that the position of the pressing member 612 can be reversely returned.

Referring to fig. 8 and 9, the second edge cutting device 5 is used for cutting the irregular edge at the long edge of the opening of the battery case, and specifically, the second edge cutting device 5 includes a second movable blade 51, a second fixed blade 52, a second lifting assembly, and a second driving assembly 53 for driving the second movable blade 51 to move.

In this embodiment, the second edge cutting device 5 and the first edge cutting device 4 have a structure similar to a shearing principle, specifically, the second movable knife 51 is provided with a second limiting through cavity 511 capable of accommodating a battery shell, the outer wall of the second fixed knife 52 is formed with a table top, and the lower end surface of the second movable knife 51 is matched with the table top of the second fixed knife 52 to communicate with a shearing opening; correspondingly, a horizontal gap is formed between the inner side wall of the second movable knife 51 and the extension of the table top of the second fixed knife 52, so that the irregular edge at the long edge of the opening of the battery shell can extend into the horizontal gap.

In addition, the upper surface of the second moving blade 51 is also provided with a reference surface, and the edge of the short edge of the opening part of the battery shell can be sheared and trimmed to obtain a flat short edge end edge; correspondingly, the reference surface of the upper surface of the second movable blade 51 is used for the short-side end edges of the battery shell to abut against, so as to limit the vertical position of the battery shell in the second limiting through cavity 511. When the reference surface of the upper surface of the second movable blade 51 abuts against the short-side end edge of the battery case, the battery case is at a sheared height.

Referring to fig. 10, the reciprocating feeding device 7 is used for clamping the battery shell and conveying the battery shell at a fixed distance; specifically, the reciprocating feeding device 7 includes a main sliding frame 71, a clamping assembly, a clamping driving mechanism 73 and a reciprocating driving mechanism 74. The main sliding frame 71 comprises two sets of sliding rods 711 arranged in parallel and sliding pieces 712 arranged below the sliding rods 711, the length direction of the two sets of sliding rods 711 is consistent with the arrangement direction of the treatment process, and the arrangement direction of the two sets of sliding rods 711 is perpendicular to the length direction of the main sliding frame. The sliding rod 711 is connected with the sliding piece 712 in a sliding manner, the sliding direction is parallel to the length direction of the sliding rod 711, and meanwhile, the sliding piece 712 is connected with the workbench 13 in a sliding manner, and the sliding direction is perpendicular to the length direction of the sliding rod 711; the two sets of sliding bars 711 can move along the length direction of the working platform 13, and can move close to or away from each other along with the movement of the sliding piece 712.

Correspondingly, the clamping assemblies are provided with a plurality of groups, each group of clamping assemblies comprises two clamping pieces 72 which are matched with each other, and the two clamping pieces 72 are connected to the two groups of sliding rods 711 in a one-to-one correspondence manner; meanwhile, the clamping driving mechanism 73 is used for driving the sliding part 712 to drive the two sets of sliding rods 711 to move close to or away from each other, so as to achieve the effect of clamping or loosening the battery shell by the clamping assembly. In addition, the reciprocating driving mechanism 74 is used to drive the two sets of sliding rods 711 to move along the length direction thereof, so as to clamp the battery housing for fixed-distance movement.

Specifically, referring to fig. 10 and 11, there are two sliding members 712 connected below the single sliding rod 711, and correspondingly, the reciprocating feeding device 7 further includes two mounting seats 75 for fixedly connecting with the workbench 13, and the positions of the two mounting seats 75 correspond to the positions of the two sliding members 712 of the sliding rod 711 one by one. Meanwhile, two sliding pieces 712 corresponding to the two sets of sliding rods 711 are connected to the upper side of the mounting base 75; in this embodiment, the sliding member 712 is a rectangular plate.

A sliding seat is fixedly connected below the sliding part 712, correspondingly, a sliding rail matched with the sliding seat is fixedly installed on the upper side of the mounting seat 75, so that the sliding connection between the sliding part 712 and the mounting seat 75 is realized through the sliding fit between the sliding rail and the sliding seat. In addition, a sliding seat is also fixedly mounted on the upper side of the sliding piece 712; correspondingly, the lower surface of the sliding rod 711 is fixedly provided with a guide rail matched with the sliding seat, so that the sliding connection between the sliding part 712 and the sliding rod 711 is realized.

Referring to fig. 10, the clamping assembly is adapted to the external configuration of the battery housing to clamp the workpiece, in this embodiment, two clamping members 72 in the clamping assembly cooperate to tightly abut two side walls of the battery housing that face away from each other; specifically, the clamping member 72 is in an L-shaped block shape and is fixedly connected with the sliding rod 711 through a bolt; meanwhile, the end of the clamping piece 72, which abuts against the side wall of the battery shell, can be correspondingly provided with an elastic silica gel block, so that the rigid collision to the battery shell in the clamping process is reduced.

Referring to fig. 12 and 13, the clamping driving mechanism 73 is used for driving the sliding member 712 to drive the two sets of sliding rods 711 to move toward or away from each other, and specifically, the clamping driving mechanism 73 includes two power assemblies 731, a linkage assembly 732 installed between the two power assemblies 731 for transmitting power, and a servo motor 733 for outputting power.

Referring to fig. 10 and 13, two power assemblies 731 are connected to the two mounting seats 75 in a one-to-one correspondence, and are used for converting the power of the servo motor 733 into the movement of the sliding member 712; specifically, the power assembly 731 includes a swing arm 7311 and two connecting rods 7312, and the swing arm 7311 is rotatably connected to the mounting base 75 through a vertical rotating shaft, so as to realize the rotatable connection between the swing arm 7311 and the workbench 13. Meanwhile, the two connecting rods 7312 are respectively located at two sides of the rotating shaft, one end of the two connecting rods 7312 close to the rotating shaft is hinged to the swing arm 7311, the two hinge points are in central symmetry with the rotating shaft, and the end parts of the two connecting rods 7312 departing from each other are correspondingly hinged to the two sliding pieces 712 connected to the mounting base 75 in a sliding manner.

Referring to fig. 12 and 14, the linkage assembly 732 is used to transmit power of one of the swing arms 7311 to the other swing arm 7311, and in particular, the linkage assembly 732 includes a linkage arm 7321, an adjusting arm 7322, and a linkage rod 7323. The linkage arms 7321 are parallel to each other, wherein the end of one linkage arm 7321 is fixedly connected with the rotating shaft of one swing arm 7311, and the end of the other linkage arm 7321 is fixedly connected with the rotating shaft of the other swing arm 7311.

The two adjusting arms 7322 are parallel to each other, and the two adjusting arms 7322 are connected to the two linkage arms 7321 in a one-to-one correspondence manner; specifically, one end of the adjusting arm 7322 is connected to the worktable 13 by sliding the slider and the guide rail, the sliding direction of the end of the adjusting arm 7322 is the same as the arrangement direction of the treatment processes, and the other end of the adjusting arm 7322 is rotatably connected to the movable block 73221; correspondingly, the linkage arm 7321 is provided with a movable groove 73211 along the length direction thereof, in which the movable block 73221 is inserted and slides. In addition, the linkage rod 7323 is in a long bar shape, and one end of the linkage rod 7323 is fixedly connected to one adjusting arm 7322, and the other end is fixedly connected to the other adjusting arm 7322; an output shaft of the servo motor 733 is fixedly connected to a rotating shaft to which one of the swing arms 7311 is connected.

When one of the swing arms 7311 is directly driven by the servo motor 733 to rotate, the torque of the swing arm 7311 can be stably transmitted to the swing arms 7311 of all the power assemblies 731 by the linkage assembly 732, so as to drive all the swing arms 7311 to synchronously and stably rotate, thereby achieving the purpose of synchronously and stably driving the sliding member 712 to move.

Referring to fig. 10, the reciprocating driving mechanism 74 is configured to drive the two sets of sliding rods 711 to move reciprocally along the length direction of the sliding rods 711, and specifically, the reciprocating driving mechanism 74 includes a linear screw rod module 741 and a driving main board 742. The linear screw module 741 is fixedly mounted on the worktable 13, and the driving main board 742 is connected to a slider of the linear screw module 741, so as to realize the sliding connection between the driving main board 742 and the worktable 13.

Meanwhile, referring to fig. 15, the end of the sliding bar 711 is slidably connected to the main driving plate 742, and the sliding direction of the end of the sliding bar 711 is perpendicular to the length direction of the sliding bar 711. Specifically, two guide wheels 7111 are arranged at the end part of the sliding rod 711 close to the driving main plate 742, and the two guide wheels 7111 are arranged at intervals along the length direction of the sliding rod 711; accordingly, a guide block 7421 is formed on the driving main plate 742, the length direction of the guide block 7421 is perpendicular to the length direction of the sliding rod 711, and the guide block 7421 can be inserted into the gap between the two guide wheels 7111. The sliding connection between the end of the sliding rod 711 and the driving main plate 742 can be realized by the cooperation between the two guiding wheels 7111 and the guiding block 7421.

The implementation principle of the trimming system for the battery shell in the embodiment of the application is as follows:

the edge of the opening of the battery shell is cut into two steps, specifically, the edge of the short side of the opening of the battery shell can be cut firstly, and then the edge of the long side can be cut, and then the edge of the short side can be cut; meanwhile, in the process of actually cutting the edge, the edge is cut by the cutting openings formed between the first movable knife 41 and the first fixed knife 42, and between the second movable knife 51 and the second fixed knife 52, so that the situation that the opening part of the battery shell is thinned due to extrusion of the shell wall of the battery shell can be reduced compared with extrusion cutting.

In the process of edge shearing, the battery shell is likely to be warped due to shearing force, in the scheme, the vertical height of the battery shell can be limited by adopting the edge-cutting vertical-pressing device 6, and the condition of uneven shearing caused by upward movement of the battery shell under stress is reduced; in addition, in the actual shearing process, the battery shell moves along with the first movable blade 41 or the second movable blade 51, and accordingly, the pressing member 612 pressing against the battery shell can also move along with the movement, so that the position deviation of the battery shell due to horizontal friction can be reduced, and the good forming quality of the final battery shell is maintained.

In addition, when the first cutting is performed, the height of the battery case is defined by the first elevation 431 with reference to the inner wall of the bottom of the battery case so as to determine the cutting height of the battery case when the first cutting is performed; after the battery shell is sheared for the first time, a flat first end edge is obtained, the height of the battery shell can be limited by the matching of the second end edge and the reference surface on the second fixed cutter 52 during the second shearing so as to determine the shearing height of the battery shell during the second shearing, and the determination of the shearing height during the second shearing is determined based on the first shearing result so as to maintain the consistency of the two shearing positions of the battery shell.

The embodiment of the application also discloses an edge cutting process for the battery shell, which is applied to the edge cutting system for the battery shell and comprises the following steps:

and S01, preparing the battery shell.

The battery housing is formed by a drawing process and flows from the drawing device into the feeding conveyor belt 11 by means of manual picking or the guiding action of an inclined guide plate. Meanwhile, the battery shell formed by the stretching process is in a rectangular shell shape with an opening on one side, and irregular edges are arranged at the short sides of the long sides of the opening of the battery shell.

And S015, leveling the shell wall of the battery shell.

The shell walls of the battery shell comprise four side shell walls and a bottom shell wall of the battery shell; that is, in this embodiment, all the walls of the battery case are pressed and flattened.

S02, placing the battery shell in the first limiting through cavity 411 of the first movable blade 41, and determining the first shearing height of the battery shell by taking the bottom inner wall of the battery shell as a reference.

Wherein, the first limit through cavity 411 is in a vertical through cavity shape, and the upper end and the lower end are both in an open shape; and the battery case is placed in the first limit through groove in a posture in which the mouth portion faces. Correspondingly, the upper end opening of the first limiting through cavity 411 is used for placing a battery shell, and the lower end opening of the first limiting through cavity 411 is used for enabling the edge of the opening part of the battery shell to be located at the shearing position between the first movable knife 41 and the first fixed knife 42.

Meanwhile, the first limiting through cavity 411 of the first movable blade 41 is matched with the external size of the battery shell, so that the battery shell can be limited; and when the first movable blade 41 moves, the battery case can be driven to move together.

In addition, the process of determining the first shearing height is to use the first lifting member 431 to support the inner wall of the bottom of the battery case, which is taken as a reference, so as to determine the first shearing height.

And S03, performing first shearing on the two first edges of the opening part of the battery shell to obtain two flat first end edges.

The two first edges are correspondingly positioned on the two opposite side walls of the opening part of the battery shell one by one; in this embodiment, the first edge of the first cut may be an irregular edge at the short side of the mouth of the battery case.

Specifically, the step S03 includes the following steps:

s031, apply a vertical pressure to the battery case by using the trimming vertical pressing device 6, and drive the first movable knife 41 to drive the battery case to move along the first direction relative to the first fixed knife 42, so as to perform a first shearing on a first edge of the opening of the battery case, thereby obtaining a flat first end edge.

The part of the trimming vertical pressing device 6 that directly presses the battery case in contact is the pressing member 612, and when the first moving blade 41 drives the battery case to move, the pressing member 612 can move horizontally along with the battery case.

The lower surface of the first moving blade 41 is matched with the upper surface of the first fixed blade 42 to form two shearing openings, and the two shearing openings are arranged on two sides of the first fixed blade 42. Meanwhile, a horizontal shearing gap is formed between the first power of the shearing opening and the first fixed knife 42; in this embodiment, the edges at the two short sides of the battery case mouth of the first limiting through cavity 411 are both in the shear gap.

When the first movable blade 41 drives the battery shell to move along the first direction, the first movable blade 41 and the first fixed blade 42 at one shearing opening perform shearing action, that is, the edge at one of the short edges of the opening of the battery shell can be sheared, so that an integral first end edge is obtained.

S032, removing the vertical pressure applied to the battery case by the trimming vertical pressing device 6, and driving the first moving blade 41 to drive the battery case to move along the second direction relative to the first fixed blade 42.

The first direction and the second direction are both parallel to the moving direction of the first moving blade 41, and the first direction and the second direction are opposite.

And S033, after the first end edge obtained in the step S031 is suspended, applying vertical pressure to the battery shell, and driving the first movable knife 41 to drive the battery shell to move relative to the first fixed knife 42 continuously along the second direction so as to perform first shearing on the other first edge of the opening part of the battery shell, so as to obtain the other flat first end edge.

After the first cutting of the first edge is completed and the first end edge is formed in step S031, the end surface of the first end edge will contact with the upper end surface of the first fixed blade 42; correspondingly, the first end edge is suspended, which means that the first end edge is separated from the upper end surface of the first fixed blade 42 along the end surface.

And S04, placing the battery shell in the second limiting through cavity 511 of the second movable blade 51, and determining a second shearing height of the battery shell by taking the end surface of the first end edge as a reference.

The second limiting through cavity 511 is in a vertical through cavity shape, and the upper end and the lower end of the second limiting through cavity are both in an open shape; and the battery case is placed in the second limit through groove in a posture in which the mouth portion faces. Correspondingly, the upper end of the second limiting through cavity 511 is open for the battery shell to be put in, and the lower end of the second limiting through cavity 511 is open for the edge of the opening of the battery shell to be positioned at the shearing position between the second movable knife 51 and the second fixed knife 52.

Meanwhile, the first limiting through cavity 411 of the second movable blade 51 is matched with the external size of the battery shell, so that the battery shell can be limited; and when the second movable blade 51 moves, the battery case can be driven to move together.

In addition, the second fixed blade 52 has a reference surface on the upper surface thereof, and in the process of determining the second shearing height, specifically, the second shearing height is determined by supporting the end surfaces of the first end edges with reference to the end surfaces of the two first end edges obtained by the first shearing in step S03 from the reference surface of the upper surface of the second fixed blade 52.

And S05, performing secondary shearing on the two second edges of the opening part of the battery shell to obtain two flat second end edges.

The two second edges are correspondingly arranged on two opposite side walls of the opening part of the battery shell one by one, and the side wall where the second edge is arranged is vertical to the side wall where the first edge is arranged; in this embodiment, the second edge of the second shearing may be an irregular edge at the long edge of the opening of the battery case.

Meanwhile, the specific cutting step of the second edge in step S05 is similar to the specific cutting step of the first edge in step S03, and is not described herein again.

And S055, flattening the wall of the battery shell after the edge cutting, and measuring the relevant dimension of the battery shell.

Meanwhile, the size of the battery case mainly includes the height from the mouth to the bottom; specifically, a photoelectric sensor may be used for distance measurement determination.

And S06, transferring the battery shell to blanking.

If the size determined in the step S055 meets the preset value, transferring the battery shell to a qualified product area; if the size measured in step S055 does not meet the preset value, the battery case is transferred to the reject area.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A trimming system for a battery case, comprising:

the device comprises a rack (1), wherein the rack (1) is provided with a workbench (13);

the first edge cutting device (4) is arranged on the workbench (13); the first trimming device (4) comprises a first movable cutter (41), a first fixed cutter (42), a first lifting assembly (43) and a first driving assembly (44) for driving the first movable cutter (41) to move, the first movable cutter (41) is provided with a first limiting through cavity (411) for accommodating a battery shell, the lower surface of the first movable cutter (41) is matched with the upper surface of the first fixed cutter (42) to form a shearing opening, and the first lifting assembly (43) is used for driving the battery shell to move upwards and separate from the first limiting through cavity (411);

the second edge cutting device (5) is arranged on the workbench (13); the second trimming device (5) comprises a second movable knife (51), a second fixed knife (52), a second lifting assembly and a second driving assembly (53) for driving the second movable knife (51) to move, and the moving direction of the second movable knife (51) is vertical to the moving direction of the first movable knife (41);

the two groups of edge cutting vertical pressing devices (6) are arranged above the first edge cutting device (4) and the second edge cutting device (5) in a one-to-one correspondence manner; the trimming vertical pressing device (6) comprises a pressing assembly (61) and a vertical driving mechanism for driving the pressing assembly (61) to move vertically, wherein the pressing assembly (61) comprises a pressing base plate (611) connected to the driving end of the vertical driving mechanism, a pressing piece (612) connected below the pressing base plate (611) in a sliding mode and an elastic restoring piece (613); the sliding direction of the pressing piece (612) above the first edge cutting device (4) is parallel to the moving direction of the first movable knife (41), and the sliding direction of the pressing piece (612) above the second edge cutting device (5) is parallel to the moving direction of the second movable knife (51).

2. The trimming system for battery cases according to claim 1, wherein: the vertical driving mechanism comprises a vertical driving assembly (62) and a pressure applying spring (63), the driving end of the vertical driving assembly (62) is connected with a connecting plate (6221), the connecting plate (6221) is connected with a pressure applying base plate (611) through a vertical sliding column, the pressure applying spring (63) is sleeved on the vertical sliding column, the upper end of the pressure applying spring (63) abuts against the connecting plate (6221), and the lower end of the pressure applying spring abuts against the pressure applying base plate (611).

3. The trimming system for battery cases according to claim 1, wherein: the first lifting assembly (43) comprises a first lifting piece (431) and a first lifting driving piece for driving the lifting plate to move vertically, the first lifting piece (431) is used for pressing the inner wall of the bottom of the battery shell, and the first lifting piece (431) has a lifting position and a reference position relative to the first fixed knife (42); when the first lifting piece (431) is in a lifting position, the battery shell sleeved on the first lifting piece (431) is in a state of being completely separated from the first limiting through cavity (411); when the first lifting piece (431) is at the standard position, the battery shell sleeved on the first lifting piece (431) is at the sheared height.

4. The trimming system for battery cases according to claim 3, wherein: the end edge of the battery shell after being cut by the first edge cutting device (4) is called as a first end edge, the second fixed knife (52) is provided with a datum plane for the first end edge to press, and when the first end edge of the battery shell is pressed against the datum plane, the battery shell is at the cut height.

5. The trimming system for battery cases according to claim 1, wherein: the battery shell trimming device comprises a frame (1), a first trimming device (4), a second trimming device (5) and two groups of shell trimming devices (3) which are connected to the frame (1) and used for trimming each side wall of a battery shell, wherein one group of the shell trimming devices (3) are located on one side, deviating from the second trimming device (5), of the first trimming device, and the other group of the shell trimming devices (3) are located on one side, deviating from the first trimming device (4), of the second trimming device (5).

6. The trimming system for battery cases of claim 5, wherein: the battery case reciprocating feeding device is characterized by further comprising a reciprocating feeding device (7) which is connected to the rack (1) and used for driving the battery case to move equidistantly along the production process, wherein the reciprocating feeding device (7) comprises a clamping mechanism used for clamping the battery case and a distance driving mechanism used for driving the clamping mechanism to move at a certain distance.

7. The trimming system for battery cases of claim 5, wherein: the battery shell turnover device is characterized by further comprising a turnover feeding device (2) connected to the rack (1), wherein the turnover feeding device (2) is used for turning over the battery shell to a shell leveling device (3) with an opening facing downwards and moving to one side of the first trimming device (4).

8. A trimming process for a battery case, applied to the trimming system for a battery case according to any one of claims 1 to 7, comprising the steps of:

s01, preparing a battery shell;

s02, placing the battery shell in a first limiting through cavity (411) of a first movable blade (41), and determining a first shearing height of the battery shell by taking the inner wall of the bottom of the battery shell as a reference;

s04, placing the battery shell in a second limiting through cavity (511) of a second movable knife (51), and determining a second shearing height of the battery shell by taking the end surface of the first end edge as a reference;

and S06, transferring the battery shell to blanking.

9. The edge slitting process for battery cases according to claim 8, characterized by comprising, in particular, in step S03:

s031, applying a vertical pressure to the battery shell by using an edge cutting vertical pressing device (6), driving a first movable knife (41) to drive the battery shell to move along a first direction relative to a first fixed knife (42) so as to cut a first edge of the opening part of the battery shell for the first time, and obtaining a flat first end edge;

s032, relieving the vertical pressure applied to the battery shell by the trimming vertical pressing device (6), and driving the first movable knife (41) to drive the battery shell to move along a second direction relative to the first fixed knife (42); wherein the first direction and the second direction are parallel and opposite;

and S033, after the first end edge obtained in the step S031 is suspended, applying vertical pressure to the battery shell, and driving the first movable knife (41) to drive the battery shell to move relative to the first fixed knife (42) continuously along the second direction so as to cut the other first edge of the opening part of the battery shell for the first time to obtain the other flat first end edge.

10. The edge slitting process for a battery case according to claim 8, wherein: in step S02, a first lifting member (431) supports the inner wall of the bottom of the battery case to determine a first shearing height; in step S04, a second shearing height is determined by supporting the first end edge by the reference surface of the second stationary blade (52).