CN114453494B

CN114453494B - Trimming system and trimming process for battery shell

Info

Publication number: CN114453494B
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: 2024-02-27
Anticipated expiration: 2042-01-18
Also published as: CN114453494A

Abstract

The application relates to the technical field of battery processing, in particular to a trimming system and a trimming process for a battery shell, wherein the trimming system comprises a frame, a first trimming device, a second trimming device and two groups of trimming vertical pressing devices, the first trimming 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 shear opening; the second edge cutting device comprises a second movable cutter, a second fixed cutter and a second driving component, and the second movable cutter is perpendicular to the moving direction of the first movable cutter; the trimming 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 return piece; the sliding direction of the pressing piece above the first trimming device is parallel to the moving direction of the first movable knife, and the sliding direction of the pressing piece above the second trimming device is parallel to the moving direction of the second movable knife. The present application can maintain good molding quality of the final battery case.

Description

Trimming system and trimming 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 housing is an important component of the power battery and can serve to contain and protect internal components. Referring to fig. 1, a battery case in the market is generally rectangular in shape, and one end of the battery case is provided with an opening called a mouth 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 supporting and limiting the internal components of the power battery. And after the internal components are loaded, the internal components are welded and fixed with one end cover, and the packaging of the power battery can be completed.

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

Disclosure of Invention

In a first aspect, the present application provides a trimming system and 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 system and side cut technology for battery case adopts following technical scheme:

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

the machine frame is provided with a workbench;

the first cutting device is arranged on the workbench; the first cutting device comprises a first movable cutter, a first fixed cutter, a first lifting component and a first driving component 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 cutting opening, and the first lifting component is used for driving the battery shell to move upwards from the first limiting through cavity to be separated;

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

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

By adopting the technical scheme, the edge cutting of the opening of the battery shell is divided 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 the edge of the long side can be cut firstly and then the edge of the short side can be cut; meanwhile, in the process of actually cutting off the edge, the edge is sheared by a shearing opening formed between the first movable cutter and the first fixed cutter and between the second movable cutter and the second fixed cutter, and compared with extrusion cutting, the situation that the opening part 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 situation that the battery shell possibly warps up due to shearing force is avoided, in the scheme, the vertical height of the battery shell can be limited by adopting the trimming vertical pressing device, and the situation that shearing unevenness occurs due to the fact that the battery shell is stressed to move upwards is reduced; in addition, in the actual shearing process, the battery shell moves along with the first movable knife or the second movable knife, and correspondingly, the pressing piece which is pressed against the battery shell also can move along with the battery shell, so that the position deviation of the battery shell due to horizontal friction force can be reduced, and the good forming quality of the final battery shell is maintained.

Optionally, the vertical actuating mechanism includes vertical drive assembly and pressure spring, vertical drive assembly drive end is connected with the connecting plate, the connecting plate is connected through vertical traveller with the base plate that applies pressure, the spring cover that applies pressure is located on the vertical traveller, just the upper end and the connecting plate of pressure spring offset, the lower extreme offsets with the base plate that applies pressure.

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

Optionally, the first lifting assembly comprises a first lifting element and a first lifting driving element for driving the lifting plate to move vertically, the first lifting element is used for being abutted against the inner wall of the bottom of the battery shell, and the first lifting element has a lifting position and a reference position relative to the first positioning cutter; when the first lifting piece is in the lifting 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 in the reference position, the battery shell sleeved on the first lifting piece is at a sheared height.

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

Optionally, the end edge of the battery shell cut by the first cutting device is called a first end edge, the second stationary knife is provided with a reference surface for the first end edge to press against, and the battery shell is at a cut height when the first end edge of the battery shell is pressed against the reference surface.

Through adopting above-mentioned technical scheme, after the battery casing is sheared for the first time, obtain smooth first end edge, when shearing for the second time, utilize the cooperation of second end edge and the reference surface on the second stationary knife to highly prescribe a limit to the battery casing to confirm the shearing height of battery casing when shearing for the second time, and the determination of shearing height is based on the first shearing result and confirms, is convenient for keep the uniformity of battery casing twice shearing position.

Optionally, the battery case further comprises two sets of case leveling devices connected to the frame and used for leveling side walls of the battery case, wherein one set of case leveling devices is located at one side of the first trimming device, which is away from the second trimming device, and the other set of case leveling devices is located at one side of the second trimming device, which is away from the first trimming 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; simultaneously, after the battery shell is sheared, the shell wall of the battery shell is leveled by utilizing the shell leveling device, so that the final forming quality of the final battery shell is higher, and the subsequent more accurate detection of the size of the sheared battery shell is facilitated.

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

Through adopting above-mentioned technical scheme, in the actual process, can simply consider the processing procedure that the battery casing passed to include first flattening, first shearing, second shearing and second flattening in proper order, if carry out the distance through reciprocal material feeding unit with the battery casing and carry, can correspondingly reduce the setting of power supply.

Optionally, the battery shell comprises a first cutting device and a second cutting device, wherein the first cutting device is used for cutting the battery shell into a first cut-off device, and the second cutting device is used for cutting the battery shell into a second cut-off device.

Through adopting above-mentioned technical scheme, in shearing and the process of flattening, battery case all is the vertical form down of oral area, and the battery case who is carried in practice then is the oral area level form generally, therefore can adopt upset loading attachment to overturn battery case and material loading.

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

The trimming process for the battery shell adopts the following technical scheme:

the trimming process for the battery shell is applied to the trimming 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 a first movable cutter, 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, cutting two first edges of the opening of the battery shell for the first time to obtain two flat first end edges; wherein, two first edges are correspondingly positioned on two opposite side walls of the opening of the battery shell one by one;

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

s05, shearing the two second edges of the opening of the battery shell for the second time to obtain two flat second end edges; the two second edges are positioned on two opposite side walls of the opening of the battery shell in a one-to-one correspondence manner, and the side wall where the second edge is positioned is perpendicular to the side wall where the first edge is positioned;

s06, transferring and discharging the battery shell.

By adopting the technical scheme, the determination of the shearing height in 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 conveniently maintained, and the conditions that the forming quality of the battery shell is reduced due to inconsistent shearing positions are reduced.

Optionally, in step S03, specifically includes:

s031, applying vertical pressure to the battery shell by using a trimming vertical pressing device, and driving a first movable cutter to drive the battery shell to move along a first direction relative to a first fixed cutter so as to shear a first edge of the opening of the battery shell for the first time to obtain a flat first end edge;

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

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 cutter to drive the battery shell to continuously move along the second direction relative to the first fixed cutter so as to cut the other first edge of the opening of the battery shell for the first time, thereby obtaining the other flat first end edge.

By adopting the technical scheme, the battery shell is pressed in the process of shearing for the first time, so that the situation that the shearing flatness is affected due to upward movement of the battery shell when the battery shell is subjected to shearing force can be reduced; meanwhile, after the first edge of the first strip is sheared for the first time to form a first end edge, the vertical pressure is relieved, and then the whole battery shell is moved back, so that the situation that the first end edge is scratched hard can be reduced, and the positioning accuracy of the first end edge serving as a reference in the second shearing process is kept.

Optionally, in step S02, the first lifting element supports the inner wall of the bottom of the cell housing, and a first shear height is determined; in step S04, the first end edge is supported by the reference surface of the second stationary blade, and the second shearing height is determined.

Through adopting above-mentioned technical scheme, can confirm corresponding first shearing height and second shearing height, and the determination of shearing height is based on first shearing result and confirms when shearing for the second time, is convenient for keep the uniformity of battery case twice shearing position.

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

the occurrence of uneven shearing caused by the upward movement of the battery shell can be reduced, and the position deviation of the battery shell caused by horizontal friction force can be reduced, so that the good forming quality of the final battery shell is maintained;

The pressure applied to the battery shell is elastic, so that the compression effect on the battery shell can be effectively achieved, and the situation that the battery shell is stressed and deformed due to excessive force application is not easy to occur;

during the second shearing, the height of the battery shell can be limited by utilizing the cooperation of the second end edge and the datum plane on the second fixed cutter 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 be convenient for keeping the consistency of the two shearing positions of the battery shell.

Drawings

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

FIG. 2 is a schematic front view of a trimming system according to embodiments of the present application;

FIG. 3 is an overall schematic of a shell flattening device in an embodiment of the present application;

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

FIG. 5 is a cross-sectional view of a first cutting device in an embodiment of the present application;

FIG. 6 is an overall schematic of a trimming vertical compression device in an embodiment of the present application;

FIG. 7 is a schematic view of a pressing assembly and a vertical drive rod according to an embodiment of the present application;

FIG. 8 is a schematic view of a second edge slitting device according to an embodiment of the application;

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

FIG. 10 is a schematic view of a reciprocating feed device 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 diagram of a linkage assembly and a servo motor in 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 view 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.

Reference numerals illustrate: 1. a frame; 11. a feeding conveyer belt; 12. a blanking 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 cutting device; 41. a first movable knife; 411. the first limiting through cavity; 42. a first stationary knife; 421. a first support plate; 43. a first lifting assembly; 431. a first lifting member; 432. a first lifting lever; 44. a first drive assembly; 441. a first base; 442. a first motor; 443. a first eccentric disc; 444. a first swing rod; 5. a second trimming device; 51. a second movable knife; 511. the second limiting through cavity; 52. a second stationary knife; 53. a second drive assembly; 6. trimming vertical pressing device; 61. a pressing assembly; 611. a pressing substrate; 6111. a return seat; 612. a pressurizing member; 6121. a U-shaped block; 613. an elastic return member; 62. a vertical drive assembly; 621. a vertical screw rod module; 622. a vertical transmission rod; 6221. a connecting plate; 623. a vertical driving motor; 63. a pressing 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 driving mechanism; 731. a power assembly; 7311. swing 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 a main board; 7421. a guide block; 75. a mounting base; 8. and a flaring device.

Detailed Description

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

The embodiment of the application discloses a trimming system for a battery shell. Referring to fig. 1 and 2, the trimming system for the battery case includes a frame 1, a turnover feeding device 2, a case flattening 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 platy, and the length direction of workstation 13 is unanimous with the length direction of frame 1.

In the 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 trimming station, second trimming station, flaring station and second flattening station from the material loading end to the unloading end in proper order and equidistance.

Correspondingly, the shell leveling devices 3 are provided with two groups, wherein one group of shell leveling devices 3 is positioned at the first leveling station and is used for leveling the shell wall of the battery shell before trimming; another set of casing flattening devices 3 is at the second flattening station for flattening the battery casing walls after trimming. Meanwhile, the first trimming device 4 is arranged at a first trimming station and is used for trimming the battery shell for the first time; the second trimming device 5 is installed at the second trimming station for performing a second trimming on the battery case.

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

Meanwhile, two groups of trimming vertical pressing devices 6 are arranged, and the two groups of trimming vertical pressing devices 6 are connected to the frame 1 and are positioned right above the first trimming device 4 and the second trimming device 5 in a one-to-one correspondence manner. The edge that can actually cut the battery can all can utilize side cut to erect pressure device 6 to apply vertical pressure to battery case, reducible battery case appears the position offset and influences the condition of shearing the roughness because of receiving the shearing force.

The overturning feeding device 2 is arranged at one end of the frame 1, which is close to the feeding conveyor belt 11, and is used for picking up, overturning and transferring the battery shell on the feeding conveyor belt 11 to a feeding station; specifically, the battery shell can be picked up and turned over and then can be positioned at the feeding station. In this embodiment, the overturning loading device 2 may include a pickup assembly and an overturning assembly, where the pickup assembly may use a pneumatic chuck, and the overturning assembly may use a motor to drive; the corresponding structures are all conventional applications in automation devices and will not be described in detail herein.

A flaring device 8 is arranged at the flaring station, and the flaring device 8 is used for expanding the opening of the battery shell; in this embodiment, the flaring device 8 comprises a flaring plate capable of extending into the battery shell, a pressing plate for pressing against the battery shell and a pressing plate for driving the pressing plate to move vertically; the bottom of the flaring plate is molded to form an inclined flaring block for supporting the opening of the Zhang Dianchi shell, and the inclined flaring block is enabled to support and stretch the opening of the battery shell under the pressure of the pressing plate, so that the purpose of flaring 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 equidistantly arranged; correspondingly, the jacking structure is arranged at 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 the same height as the feeding station by utilizing the arrangement of the jacking structure. Meanwhile, the reciprocating feeding device 7 is used for driving the battery shells to move at equal intervals along the arrangement direction of the stations 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 preparation 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 a single side opening, and irregular edges exist at the opening part of the battery shell. Accordingly, the edge cutting system is required to cut the edge of the opening of the battery case.

Specifically, in the whole trimming work flow, the battery shell is firstly placed on the feeding conveyor belt 11, and is conveyed to a preset feeding position by the feeding conveyor belt 11; then, the battery case in the loading position is held by the flip-up loading device 2 and flipped into a mouth-down device, and then the mouth-down battery case is loaded 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 to the first cutting device 4, and the edge of the short side of the opening of the battery shell is sheared and removed by the first cutting device 4; after the edge of the short side of the opening of the battery shell is sheared and removed, the battery shell is transferred to the second trimming device 5, and the edge of the long side of the opening of the battery shell is sheared and removed by the second trimming device 5.

After the edges of the long edges of the opening parts of the battery shells are sheared and removed, transferring the battery shells into a shell leveling device 3 of a second leveling station for leveling; thereafter, the cut size of the battery case can be detected, and the battery case device with qualified size is transferred to the blanking conveyer belt 12, and the qualified battery case is conveyed to be blanked by the blanking conveyer belt 12.

Referring to fig. 3, the casing flattening device 3 is used for flattening the casing wall of the battery casing, and the posture of the battery casing is in a mouth-down shape; correspondingly, the battery case has five case walls in total, specifically including one bottom end case, two long-side case and two short-side case. Specifically, the housing leveling device 3 includes a leveling socket 31 capable of accommodating a battery housing therein, a leveling side plate 32 provided in the leveling socket 31, a leveling drive assembly for driving the leveling side plate 32 to move, and a vertical pressing leveling assembly for vertically pressing a bottom end case.

In one embodiment, there are only two leveling side plates 32, and the two leveling side plates 32 are respectively used for abutting against two long side shells of the piezoelectric Chi Ke body away from each other; accordingly, the leveling drive assembly is used to drive the two leveling side plates 32 toward and away from each other.

In another embodiment, four leveling side plates 32 are arranged in the leveling groove seat 31, wherein two leveling side plates 32 are used for abutting against two long side shells facing away from the piezoelectric Chi Ke body, and the other two leveling side plates 32 are used for abutting against two short side shells facing away from the piezoelectric Chi Ke body; accordingly, there are two sets of leveling drive assemblies, one of which is used for driving two leveling side plates 32 to press and level the long side shell of the battery case, and the other set of leveling drive assemblies is used for driving the other two leveling side plates 32 to press and level the short side shell of the battery case.

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

Referring to fig. 4 and 5, the first cutting means 4 is for cutting irregular edges at the short sides of the opening of the battery case; specifically, the first trimming device 4 includes a first movable blade 41, a first stationary blade 42, a first lifting assembly 43, and a first driving assembly 44 for driving the first movable blade 41 to move.

The first movable knife 41 is provided with a first limiting through cavity 411 capable of accommodating the battery shell, and the upper end and the lower end of the first limiting through cavity 411 are both open. Correspondingly, a first support plate 421 which can extend into the first limiting through cavity 411 is arranged on the first fixed knife 42; when the battery shell is accommodated in the first limiting through cavity 411 of the first movable cutter 41, the first support plate 421 can extend into the battery shell, so that the situation that the battery shell is excessively deformed due to stress in the trimming process is reduced.

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

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

Specifically, in the present embodiment, the first lift assembly 43 includes a first lift 431, a first lift rod 432, and a first lift cylinder; the first lifting member 431 is in a horizontal plate shape, and the first lifting member 431 is used for pressing the inner low wall of the battery case. 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 mounted below the first stationary knife 42, and a piston rod of the first lifting cylinder is connected with a 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 stationary knife 42; when the first lifting member 431 is in the lifting position, the battery case sleeved on the first lifting member 431 is 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 housing sleeved on the first lifting member 431 is accommodated in the first limiting through cavity 411, and the battery housing is at the sheared height.

The first driving assembly 44 is configured to drive the first movable blade 41 to reciprocate relative to the first fixed blade 42, and 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, where 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 swing rod 444 drives the first power to move linearly. In this embodiment, the first motor 422 drives the first eccentric disc 443 to rotate so that the first moving blade 41 reciprocates, and if the first moving blade 41 moves forward to shear the edge on one side of the battery case, the first moving blade 41 moves backward to shear the edge on the other side of the battery case.

Referring to fig. 6, the trimming vertical compression device 6 may vertically compress the battery case located in the first limiting through cavity 411, and in particular, the trimming vertical compression device 6 includes a compression assembly 61 and a vertical driving assembly 62 for driving the compression assembly 61 to vertically move. The vertical driving assembly 62 comprises a vertical screw rod module 621, a vertical transmission rod 622 and a vertical driving motor 623; wherein, vertical lead screw module 621 is connected with frame 1, and in this embodiment, vertical lead screw module 621 includes pedestal, the lead screw of vertical setting and the slider of cover on the lead screw and slipping with the pedestal and being connected that is connected with frame 1.

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 is operated, 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 connection plate 6221 is mounted to a lower end bolt of the vertical transmission rod 622, and a compression assembly 61 is mounted to a lower end of the connection plate 6221 to vertically move under the driving of a vertical driving motor 623. Specifically, the pressing assembly 61 includes a pressing substrate 611, a pressing member 612 slidably coupled to a lower portion of the pressing substrate 611, and an elastic restoring member 613. In this embodiment, the pressing base plate 611 and the connecting plate 6221 are connected by vertical sliding columns in a sliding manner, and the pressing springs 63 are sleeved on the vertical sliding columns, the upper ends of the pressing springs 63 are abutted against the connecting plate 6221, and the lower ends of the pressing springs 63 are abutted against the pressing base plate 611. So that the vertical pressure applied by the pressing assembly 61 to the battery case is an elastic force, the deformation of the battery case due to hard collision can be reduced.

Meanwhile, the pressing piece 612 is rectangular plate-shaped, a sliding seat is mounted on the upper surface of the pressing piece 612, correspondingly, a sliding rail matched with the sliding seat is mounted on the lower surface of the pressing substrate 611, and sliding connection between the pressing piece 612 and the pressing substrate 611 is achieved through sliding connection between the sliding rail and the sliding seat. In addition, a return seat 6111 is installed on one side of the pressing substrate 611, the spring return 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 away from each other; correspondingly, a U-shaped block 6121 is fixed on the pressure applying 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 moves horizontally relative to the pressing substrate 611 due to the external force, one of the nitrogen springs is compressed by the U-shaped block 6121, and after the external force applied to the pressing member 612 is removed, the compressed nitrogen spring gives the U-shaped block 6121 a spring restoring force, so that the position of the pressing member 612 can return reversely.

Referring to fig. 8 and 9, the second trimming device 5 is for shearing irregular edges at the long sides of the opening of the battery case, and in particular, the second trimming 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 structure of the second edge cutting device 5 and the first edge cutting device 4 are similar to the shearing principle, specifically, the second movable knife 51 is provided with a second limiting through cavity 511 capable of accommodating the battery case, 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 the shearing opening; accordingly, a horizontal gap is provided between the inner side wall of the second movable blade 51 and the extension at the table top of the second stationary blade 52 so that the irregular edge at the long side of the battery case mouth can protrude into the horizontal gap.

The upper surface of the second movable knife 51 is also provided with a reference surface, and the edge of the short side of the opening of the battery shell can be sheared and trimmed to obtain a flat short side end edge; correspondingly, the reference surface of the upper surface of the second movable knife 51 is used for abutting against the short side edge of the battery case, so as to define the vertical position of the battery case 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 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 and transporting the battery shells at fixed intervals; specifically, the reciprocating feed device 7 includes a main carriage 71, a clamping assembly, a clamping drive mechanism 73, and a reciprocating drive mechanism 74. The main sliding frame 71 includes two sets of sliding bars 711 arranged in parallel and a sliding member 712 installed below the sliding bars 711, the length direction of the two sets of sliding bars 711 is consistent with the arrangement direction of the processing procedure, and the arrangement direction of the two sets of sliding bars 711 is perpendicular to the length direction thereof. The sliding rod 711 is slidingly connected with the sliding piece 712, the sliding direction is parallel to the length direction of the sliding rod 711, and meanwhile, the sliding piece 712 is slidingly connected with the workbench 13, and the sliding direction is perpendicular to the length direction of the sliding rod 711; even if the two sets of slide bars 711 can move in the longitudinal direction of the table 13, they can move closer to or further away from each other along with the movement of the slider 712.

Correspondingly, the clamping assemblies are provided with a plurality of groups, each group of clamping assemblies comprises two matched clamping pieces 72, 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 piece 712 to drive the two groups of sliding bars 711 to be close to or far away from each other, so that the clamping assembly can clamp or unclamp the battery shell. In addition, the reciprocating driving mechanism 74 is used for driving the two groups of sliding bars 711 to move along the length direction of the sliding bars, so as to achieve the purpose of clamping the battery shell for 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 positions of the two mounting seats 75 correspond to positions of the two sliding members 712 of the sliding rod 711 one by one. Meanwhile, two sliding members 712 corresponding to the positions on the two groups of sliding rods 711 are connected to the upper side of the mounting seat 75; in this embodiment, the sliding member 712 is a rectangular plate.

The sliding seat is fixedly connected below the sliding piece 712, and correspondingly, a sliding rail matched with the sliding seat is fixedly arranged on the upper side of the mounting seat 75 so as to realize sliding connection of the sliding piece 712 and the mounting seat 75 through sliding matching of the sliding rail and the sliding seat. In addition, the upper side of the sliding piece 712 is fixedly provided with a sliding seat; correspondingly, the lower surface of the sliding rod 711 is fixedly provided with a guide rail matched with the sliding seat, so that sliding connection between the sliding piece 712 and the sliding rod 711 is realized.

Referring to fig. 10, the clamping assembly is used for adapting the external structure of the battery case to clamp the workpiece, and in this embodiment, two clamping pieces 72 in the clamping assembly cooperate to tightly press two side walls of the battery case facing away from each other; specifically, the clamping member 72 is in an L-shaped block shape and is fixedly connected with the slide bar 711 by a bolt; meanwhile, the end part of the clamping piece 72, which is abutted against the side wall of the battery shell, can be provided with a corresponding elastic silica gel block so as to reduce the rigid collision to the battery shell in the clamping process.

Referring to fig. 12 and 13, the clamping driving mechanism 73 is configured to drive the sliding member 712 to drive the two sets of sliding bars 711 to approach or separate from each other, and specifically, the clamping driving mechanism 73 includes two power components 731, a linkage component 732 installed between the two power components 731 and configured to transmit power, and a servo motor 733 configured to output power.

Referring to fig. 10 and 13, two power assemblies 731 are connected to two mounting seats 75 in a one-to-one correspondence, for converting power of the servo motor 733 into movement of the slider 712; specifically, the power assembly 731 includes a swing arm 7311 and two connecting rods 7312, where the swing arm 7311 is rotationally connected to the mounting base 75 through a vertical shaft, so as to implement rotational connection between the swing arm 7311 and the workbench 13. Meanwhile, two connecting rods 7312 are respectively located at two sides of the rotating shaft, one end, close to the rotating shaft, of each connecting rod 7312 is hinged with the corresponding swing arm 7311, two hinge points are in a central symmetry shape through the rotating shaft, and the end portions, deviating from each connecting rod 7312, of each connecting rod 7312 are hinged with two sliding pieces 712 in sliding connection with the mounting seat 75 in a one-to-one correspondence mode.

Referring to fig. 12 and 14, a linkage assembly 732 is used to transfer the power of one swing arm 7311 to the other swing arm 7311, and specifically, the linkage assembly 732 includes a linkage arm 7321, an adjustment arm 7322, and a linkage lever 7323. The linkage arms 7321 are two and parallel to each other, wherein an end of one linkage arm 7321 is fixedly connected with a rotating shaft of one swing arm 7311, and an end of the other linkage arm 7321 is fixedly connected with a 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; specifically, one end of the adjusting arm 7322 is slidably connected with the workbench 13 through the combination of the sliding block and the guide rail, the sliding direction of the end part of the adjusting arm 7322 is the same as the arrangement direction of the treatment procedure, and the other end of the adjusting arm 7322 is rotatably connected with the movable block 73221; correspondingly, the linkage arm 7321 is provided with a movable groove 73211 along its length direction for the movable block 73221 to be inserted and slid. In addition, the linkage rod 7323 has 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; the output shaft of the servo motor 733 is fixedly connected to a rotation shaft to which one of the swing arms 7311 is connected.

When one of the swing arms 7311 is directly driven to rotate by the servo motor 733, the torque of the swing arm 7311 can be stably transmitted to the swing arms 7311 of all the power components 731 by the linkage component 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 piece 712 to move.

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

Meanwhile, referring to fig. 15, the end of the slide bar 711 is slidably coupled to the driving main plate 742 and the sliding direction of the end of the slide bar 711 is perpendicular to the length direction of the slide bar 711. Specifically, the end of the sliding rod 711 near the driving main board 742 is provided with two guiding wheels 7111, and the two guiding wheels 7111 are arranged at intervals along the length direction of the sliding rod 711; correspondingly, a guide block 7421 is formed on the driving main board 742, the length direction of the guide block 7421 is perpendicular to the length direction of the slide bar 711, and the guide block 7421 can be embedded into the gap between the two guide wheels 7111. The sliding connection between the end of the slide bar 711 and the drive main board 742 can be realized by the cooperation between the two guide wheels 7111 and the guide block 7421.

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

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

In the process of edge shearing, the situation that the battery shell possibly warps up due to shearing force is avoided, and in the scheme, the vertical height of the battery shell can be limited by adopting the trimming vertical pressing device 6, so that the situation that shearing unevenness occurs due to the fact that the battery shell is stressed to move upwards is reduced; in addition, in the actual shearing process, the battery shell moves along with the first moving blade 41 or the second moving blade 51, and correspondingly, the pressing piece 612 pressed against the battery shell also moves along with the movement of the first moving blade or the second moving blade, so that the position deviation of the battery shell caused by horizontal friction force can be reduced, and the good forming quality of the final battery shell can be maintained.

In addition, when the first shearing is performed, the height of the battery shell is limited by the first lifting piece 431 by taking the inner wall of the bottom of the battery shell as a reference, so that the shearing height of the battery shell when the battery shell is sheared for the first time is determined; the battery shell is sheared for the first time to obtain a flat first end edge, and the height of the battery shell can be limited by utilizing the cooperation 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 be convenient for keeping the consistency of the two shearing positions of the battery shell.

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

s01, preparing a battery shell.

Wherein the battery housing is formed by a stretching process and is circulated from the stretching device into the feeding conveyor belt 11 by manual pick-up or guiding action of an inclined guide plate. Meanwhile, the battery shell formed through the stretching process is in a rectangular shell shape with an opening at one side, and irregular edges exist at the short side of the long side 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 the present embodiment, all the case walls of the battery case are flattened by pressing.

S02, placing the battery shell in the first limiting through cavity 411 of the first movable cutter 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.

Wherein, the first limiting 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 shell is arranged in the first limiting through groove in a state that the opening part faces. Correspondingly, the upper end opening of the first limiting through cavity 411 is used for placing the power supply shell, and the lower end opening of the first limiting through cavity 411 is used for enabling the edge of the opening of the battery shell to be located at a shearing position between the first movable cutter 41 and the first fixed cutter 42.

Meanwhile, the first limiting through cavity 411 of the first movable cutter 41 is matched with the external dimension 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 first shearing height is determined by supporting the bottom inner wall of the battery case by the first lifting member 431 based on the bottom inner wall of the battery case.

S03, cutting two first edges of the opening of the battery shell for the first time to obtain two flat first end edges.

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

Specifically, in step S03, the following steps are included:

s031, a trimming vertical pressing device 6 is used for applying vertical pressure to the battery shell, so that the first movable cutter 41 is driven to drive the battery shell to move along a first direction relative to the first fixed cutter 42, and a first edge of the opening of the battery shell is sheared for the first time, so that a flat first end edge is obtained.

The part of the trimming vertical pressing device 6 directly pressing the battery case is a 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 movable blade 41 and the upper surface of the first stationary blade 42 are matched to form two shear cuts, and the two shear cuts are separated on two sides of the first stationary blade 42. Meanwhile, a horizontal shearing gap is formed between the first power of the shearing opening and the first fixed cutter 42; in this embodiment, the edges at both short sides of the battery case mouth of the first limiting through cavity 411 are in the shearing gap.

When the first movable knife 41 drives the battery shell to move along the first direction, the first movable knife 41 and the first fixed knife 42 at one cutting opening can cut the edge of one short side of the opening of the battery shell, so that a whole first end edge is obtained.

S032, releasing the vertical pressure applied to the battery shell by the trimming vertical pressing device 6, and driving the first movable cutter 41 to drive the battery shell to move along the second direction relative to the first fixed cutter 42.

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

S033, after the first edge obtained in the step S031 is suspended, vertical pressure is applied to the battery shell, and the first movable cutter 41 is driven to drive the battery shell to continuously move along the second direction relative to the first fixed cutter 42, so that the other first edge of the opening of the battery shell is sheared for the first time, and the other flat first edge is obtained.

After the step S031 is completed to shear a first edge for the first time and form a first end edge, an end surface of the first end edge contacts with an upper end surface of the first stationary knife 42; correspondingly, the first end edge is suspended and means that the first end edge end face is separated from the upper end face of the first fixed cutter 42.

And S04, placing the battery shell in a second limiting through cavity 511 of the second movable cutter 51, and determining a second shearing height of the battery shell by taking the end face 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 are both in an open shape; and the battery shell is arranged in the second limiting through groove in a state that the opening part faces. Correspondingly, the upper end opening of the second limiting through cavity 511 is used for placing the power supply shell, and the lower end opening of the second limiting through cavity 511 is used for enabling the edge of the opening of the battery shell to be located at a 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 knife 51 is matched with the external dimension 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 upper surface of the second fixed blade 52 is provided with a reference surface, and in the process of determining the second shearing height, specifically, the end surfaces of the two first end edges obtained by the first shearing in step S03 are used as references, and the reference surface of the upper surface of the second fixed blade 52 is used for bearing the end surfaces of the first end edges, so that the second shearing height is determined.

S05, cutting the two second edges of the opening of the battery shell for the second time to obtain two flat second end edges.

The two second edges are positioned on two opposite side walls of the opening of the battery shell in a one-to-one correspondence manner, and the side wall where the second edge is positioned is perpendicular to the side wall where the first edge is positioned; in this embodiment, the second edge of the second shear may be an irregular edge at the long side of the cell case mouth.

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 will not be described here again.

S055, leveling the shell wall of the cut battery shell, and measuring the relevant size 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 ranging determination.

S06, transferring and discharging the battery shell.

If the size measured 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 foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

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

the machine comprises a frame (1), wherein the frame (1) is provided with a workbench (13);

the first cutting device (4) is arranged on the workbench (13); the first cutting device (4) comprises a first movable cutter (41), a first fixed cutter (42), a first lifting component (43) and a first driving component (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 the 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 cutting opening, and the first lifting component (43) is used for driving the battery shell to move upwards from the first limiting through cavity (411) to be separated;

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

The two groups of trimming vertical pressing devices (6) are arranged above the first trimming device (4) and the second trimming 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 manner and an elastic return piece (613); the sliding direction of the pressing piece (612) above the first trimming 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 trimming 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 pressing 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 pressing base plate (611) through a vertical sliding column, the pressing spring (63) is sleeved on the vertical sliding column, the upper end of the pressing spring (63) is propped against the connecting plate (6221), and the lower end of the pressing spring is propped against the pressing 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 vertically move, the first lifting piece (431) is used for pressing the inner wall of the bottom of the power supply shell, and the first lifting piece (431) is provided with 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 in the reference position, the battery shell sleeved on the first lifting piece (431) is at a sheared height.

4. A trimming system for battery cases according to claim 3, wherein: the end edge of the battery shell cut by the first cutting device (4) is called a first end edge, the second fixed knife (52) is provided with a reference surface for the first end edge to press against, and the battery shell is in a cut height when the first end edge of the battery shell is pressed against the reference surface.

5. The trimming system for battery cases according to claim 1, wherein: the battery shell comprises a frame (1), a first trimming device (4) and a second trimming device (5), and is characterized by further comprising two groups of shell leveling devices (3) which are connected to the frame (1) and used for leveling all side walls of the battery shell, wherein one group of shell leveling devices (3) is positioned on one side of the first trimming device (4) deviating from the second trimming device (5), and the other group of shell leveling devices (3) is positioned on one side of the second trimming device (5) deviating from the first trimming device (4).

6. The trimming system for battery cases according to claim 5, wherein: the battery shell automatic feeding device is characterized by further comprising a reciprocating feeding device (7) which is connected to the frame (1) and used for driving the battery shells to move equidistantly along the production procedure, wherein the reciprocating feeding device (7) comprises a clamping mechanism used for clamping the battery shells and a distance driving mechanism used for driving the clamping mechanism to move at fixed distances.

7. The trimming system for battery cases according to claim 5, wherein: the battery shell overturning and feeding device is characterized by further comprising an overturning and feeding device (2) connected to the frame (1), wherein the overturning and feeding device (2) is used for overturning the battery shell to a shell leveling device (3) with a downward opening and moving to one side of the first cutting device (4).

8. A trimming process for battery cases, characterized by being applied to the trimming system for battery cases 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 cutter (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 cutter (51), and determining a second shearing height of the battery shell by taking the end face of the first end edge as a reference;

s06, transferring and discharging the battery shell.

9. The trimming process for battery cases according to claim 8, characterized in that in step S03, it specifically comprises:

s031, applying vertical pressure to the battery shell by using a trimming vertical pressing device (6), and driving a first movable cutter (41) to drive the battery shell to move along a first direction relative to a first fixed cutter (42) so as to shear a first edge of the opening of the battery shell for the first time to obtain a flat first end edge;

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

S033, after the first edge obtained in the step S031 is suspended, vertical pressure is applied to the battery shell, and the first movable cutter (41) is driven to drive the battery shell to continuously move along the second direction relative to the first fixed cutter (42), so that the other first edge of the opening of the battery shell is sheared for the first time, and the other flat first edge is obtained.

10. The trimming process for battery cases according to claim 8, wherein: in step S02, the inner wall of the bottom of the battery shell is supported by a first lifting piece (431), and a first shearing height is determined; in step S04, the first end edge is supported by the reference surface of the second stationary knife (52), and a second shearing height is determined.