CN117139935B - Battery core protection board welding device of lithium battery - Google Patents

Abstract

The invention belongs to the technical field of battery manufacturing, and particularly relates to a battery core protection plate welding device of a lithium battery, which comprises a welding table, wherein a mounting seat is connected to the welding table, welding machines are arranged on two sides of the mounting seat, welding ends of the welding machines can transversely move, a placing and bending mechanism for placing a battery core protection plate and a battery pack is arranged on the mounting seat, and the placing and bending mechanism can bend lugs of the battery core protection plate; the placing and bending mechanism comprises a sliding seat, wherein the sliding seat is connected to the top of the mounting seat, and a moving plate is connected to the sliding seat in a sliding manner. After the lithium battery and the battery core protection plate are placed, the turning plate can be turned over to bend the tab of the battery core protection plate through the movement of the movable plate, so that the tab is tightly attached to the side wall of the battery pack, the tab bending is not required to be controlled manually, the automatic tab bending work is realized, and the operation is more convenient.

Description

Battery core protection board welding device of lithium battery

Technical Field

The invention belongs to the technical field of battery manufacturing, and particularly relates to a welding device for a battery core protection plate of a lithium battery.

Background

The battery protection board is mainly an integrated circuit board for protecting a rechargeable lithium battery. The protection required of a rechargeable lithium battery is determined by its own characteristics. Because the material of the lithium battery determines that the lithium battery cannot be overcharged, overdischarged, overcurrent, short-circuited and ultrahigh-temperature charged and discharged, the lithium battery assembly always appears along with a protective plate with a sampling resistor and a current protector.

In the installation process of the battery cell protection plate, the battery pack and the battery cell protection plate are required to be welded, when the battery cell protection plate is welded, the welding treatment is mainly performed through a semiautomatic welding machine, when the battery cell protection plate is welded, the lug of the battery cell protection plate is required to be bent to the side face of the battery pack manually, the lug and one close side of the battery pack are close to the welding end of the welding machine, and then the welding treatment is performed.

Disclosure of Invention

In order to overcome the defect that the electrode lug needs to be bent manually in the operation process in the conventional mode, the invention aims to provide the battery core protection plate welding device of the lithium battery, which can automatically bend the electrode lug of the battery core protection plate.

The technical proposal is as follows: the utility model provides a battery core protection board welding set of lithium cell, includes the welding bench, be connected with the mount pad on the welding bench, the welding machine is all installed to the mount pad both sides, but the welding end lateral shifting of welding machine, be equipped with the bending mechanism of placing that is used for placing battery core protection board and group battery on the mount pad, place bending mechanism can buckle the utmost point ear of battery core protection board; the utility model provides a place bending mechanism, including the sliding seat, the sliding seat is connected the mount pad top, sliding connection has the movable plate on the sliding seat, set up the holding tank that is used for holding electric core protection shield on the movable plate, the equal rotation in movable plate both sides lower part is connected with turns over the board, turn over the board with sliding seat sliding fit, the sliding seat both sides all are connected with the guide bar, the guide slot has been seted up on the guide bar, the guide bar with turn over board sliding connection, turn over the board in-connection has the convex ball, the convex ball with the guide slot cooperation of guide bar.

As the improvement of above-mentioned scheme, still including positioning mechanism, positioning mechanism is including pushing block, slide bar, gag lever post and swinging arms, the pushing block is connected the welding end of welding machine, the slide bar is provided with two and sliding connection respectively the slide holder both sides, the slide bar with be connected with elastic component one between the slide holder, the slide holder both sides are all sliding type and are connected with the gag lever post that is used for carrying out spacing to the movable plate, the slide holder both sides all rotate and are connected with the swinging arms, and two swinging arms are articulated with the gag lever post of both sides respectively and are connected, the swinging arms is located the removal orbit department of pushing the block.

As the improvement of above-mentioned scheme, the one side that two slide bars are close to each other all is provided with magnet, swing rod lower part be iron with magnet magnetic attraction cooperation.

As the improvement of above-mentioned scheme, still including control mechanism, control mechanism is including connecting rod, support and clamping lever, the connecting rod is equipped with two and connects respectively in sliding seat top both sides, rotate on the connecting rod and be connected with the leading wheel, the support is provided with two and connects respectively the movable plate both sides, be provided with the fixture block of taking the draw-in groove on the support, the breach is offered to support front side outside, the fixture block with the breach agrees with, the fixture block with be connected with between the support and connect the rope, the leading wheel is used for right connect the rope and lead, the clamping lever is connected the removal end of welding machine, the clamping lever is used for with the fixture block is fixed.

As the improvement of above-mentioned scheme, the one end that the welding machine was kept away from to the kelly is provided with elasticity buckle structure, so that the kelly can block into breach department, elasticity buckle structure comprises two slope setting and the cardboard that has elasticity, and the cardboard end is provided with the arch, and the protruding department of cardboard can block into breach position.

As the improvement of above-mentioned scheme, control mechanism still includes extrusion frame and sloping block, cardboard position is connected with sloping block, extrusion frame is provided with two and connects respectively in sliding seat top both sides, the draw-in lever passes extrusion frame, extrusion frame is used for the extrusion sloping block.

As the improvement of above-mentioned scheme, still including jack-up mechanism, jack-up mechanism is including the connecting block and be used for pushing up the push pedal of lithium cell group, the connecting block is connected movable plate bottom intermediate position, the connecting block with sliding seat sliding connection, the connecting block both sides all are connected with the extrusion rod, the push pedal is provided with two and sliding connection respectively in the sliding seat both sides, the push pedal bottom is connected with the lift plate.

As an improvement of the scheme, one side, close to the extrusion rod, of the lifting plate is obliquely arranged, so that the extrusion rod can be extruded by an oblique position to lift when moving.

As the improvement of above-mentioned scheme, still including the direction spacing, the sliding seat both sides all are connected with and are used for carrying out spacing direction spacing to the battery.

As an improvement of the scheme, the welding bench further comprises a storage platform, wherein the top of the welding bench is connected with the storage platform, and the top of the storage platform is connected with the top of the sliding seat.

1. After the lithium battery and the battery core protection plate are placed, the turning plate can be turned over to bend the tab of the battery core protection plate through the movement of the movable plate, so that the tab is tightly attached to the side wall of the battery pack, the tab bending is not required to be controlled manually, the automatic tab bending work is realized, and the operation is more convenient.

2. According to the invention, before welding, the first welding point can be limited through the setting of the limiting rod so as to assist in welding, meanwhile, after the first welding point is welded, the pull rope can be pulled through the setting of the clamping rod and the clamping block to drive the moving plate to move, so that the second welding point moves to be aligned with the welding machine, and then welding is carried out, and therefore, positioning operation can be assisted on the battery cell protection plate and the battery pack during welding, the welding position is more accurate, and the operation requirement on workers is lower.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic structural view of the bending mechanism and the mounting base according to the present invention.

Fig. 3 is a schematic structural view of the sliding seat and the moving plate of the present invention.

Fig. 4 is a schematic structural view of the bending mechanism according to the present invention.

Fig. 5 is a schematic structural view of the turning plate and the guide rod of the present invention.

Fig. 6 is a schematic structural view of the flap and the convex ball of the present invention.

Fig. 7 is a schematic structural view of the positioning mechanism of the present invention.

Fig. 8 is a cross-sectional view of the sliding seat of the present invention.

Fig. 9 is a schematic structural view of the stop lever and the swing lever of the present invention.

Fig. 10 is a schematic view of the structure of the sliding rod and the elastic member of the present invention.

Fig. 11 is a schematic view of a first construction of the control mechanism of the present invention.

Fig. 12 is a schematic view of a second construction of the control mechanism of the present invention.

Fig. 13 is a schematic view showing the structure of the bracket, the latch and the connecting rope according to the present invention.

Fig. 14 is an enlarged view of section a of fig. 11 in accordance with the present invention.

Fig. 15 is a schematic structural view of the clamping rod, the inclined block and the extrusion frame of the present invention.

Fig. 16 is a schematic structural view of the jack-up mechanism of the present invention.

Fig. 17 is a schematic diagram of the positional relationship between the guide limiting frame and the storage platform according to the present invention.

Reference numerals in the figures: 1. welding table, 2, mount pad, 3, welding machine, 41, sliding seat, 42, movable plate, 43, turning plate, 431, convex ball, 44, guide bar, 51, pushing block, 52, sliding bar, 53, elastic piece one, 54, limit bar, 55, swinging bar, 61, connecting bar, 62, guide wheel, 63, bracket, 64, fixture block, 65, clamping bar, 651, oblique block, 66, extrusion frame, 67, connecting rope, 81, connecting block, 82, extrusion bar, 83, push plate, 84, lifting plate, 9, guide limit frame, 10, and storage platform.

Detailed Description

The above-described aspects are further described below in conjunction with specific embodiments. It should be understood that these examples are illustrative of the present application and are not limiting the scope of the present application. The implementation conditions used in the examples may be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are generally those in routine experiments.

The utility model provides a lithium cell's electric core protection shield welding set, is shown as fig. 1-6, including welding bench 1, mount pad 2, welding machine 3 and placing bending mechanism, welding bench 1 top front side is connected with mount pad 2, welding machine 3 is all installed to mount pad 2 left and right sides, but the welding end lateral shifting of welding machine 3 to carry out welding work, be equipped with the placing bending mechanism that is used for placing electric core protection shield and group battery on the mount pad 2, place bending mechanism can buckle the utmost point ear of electric core protection shield.

As shown in fig. 2-6, the bending mechanism includes a sliding seat 41, a moving plate 42, a turning plate 43, a convex ball 431 and a guide rod 44, the top of the mounting seat 2 is connected with the sliding seat 41, the moving plate 41 is connected with the moving plate 42 capable of sliding back and forth, the moving plate 42 is provided with a containing groove for containing the battery protection plate, the lower parts of the left side and the right side of the moving plate 42 are respectively and rotatably connected with the turning plate 43, the turning plate 43 can slide back and forth on the sliding seat 41, the left side and the right side of the sliding seat 41 are respectively connected with the guide rod 44, the guide rod 44 is connected with the turning plate 43 in a sliding manner, the convex ball 431 is connected with the turning plate 43, and the convex ball 431 is located at the position of the guide groove of the guide rod 44, so that the convex ball 431 on the turning plate 43 can be extruded and moved by the guide groove, and the turning plate 43 is driven to rotate.

When the battery core protection plate needs to be welded, the device can be used, when the device is used, the battery core protection plate is firstly placed on the movable plate 42, the lugs on two sides of the battery core protection plate are respectively located above the two side turning plates 43, then the movable plate 42 can be controlled to move along the sliding seat 41, the movable plate 42 can drive the turning plates 43 to move together when moving, the turning plates 43 can drive the convex balls 431 to slide along the guide grooves on the guide rods 44 when moving, the convex balls 431 can drive the turning plates 43 to rotate ninety degrees along the guide grooves when sliding, the turning plates 43 can squeeze lugs of a battery when rotating ninety degrees, so that the lugs of the battery core protection plate are turned over, the lugs are enabled to be attached to two sides of the battery, then the movable plate 42 is continuously pulled to move, when the lugs and the welding spots of the battery are moved to be opposite to the welding spots of the welding machine 3, the welding machine 3 can be controlled to weld the lugs and the battery, and when welding is required to be continuously pulled to move the movable plate 42 to move to the rear side of the battery to the guide grooves when welding spots, the welding efficiency of the battery core protection plate can be further improved, and the manual welding process can be carried out when the lug is achieved, and the manual welding process is improved.

As shown in fig. 7-10, the positioning mechanism further comprises a pushing block 51, a sliding rod 52, an elastic member one 53, a limiting rod 54 and a swinging rod 55, the lower part of the welding end of the welding machine 3 is connected with the pushing block 51, the left side and the right side of the sliding seat 41 are both connected with the sliding rod 52 in a sliding manner, the elastic member one 53 is an elastic rope, the sides, close to each other, of the two sliding rods 52 are both provided with magnets, the two sides of the sliding seat 41 are both connected with the limiting rod 54 in a sliding manner, the sides, close to each other, of the two limiting rods 54 are provided with inclined planes, the inclined planes extend into the moving track of the moving plate 42, so that the limiting rod 54 can block the moving plate 42, the left side and the right side of the sliding seat 41 are both rotationally connected with the swinging rod 55, the two swinging rods 55 are respectively hinged with the limiting rods 54 on the two sides, the swinging rod 55 is located at the moving track of the pushing block 51, and the lower part of the swinging rod 55 is in a magnetic attraction fit with the magnets.

As shown in fig. 10-15, the welding machine further comprises a control mechanism, the control mechanism comprises a connecting rod 61, guide wheels 62, a support 63, clamping blocks 64, clamping rods 65 and connecting ropes 67, the left side and the right side of the top of the sliding seat 41 are connected with the connecting rod 61, the rear end of the connecting rod 61 is rotationally connected with the guide wheels 62, the left side and the right side of the moving plate 42 are connected with the support 63, the front side of the support 63 is provided with the clamping blocks 64 with clamping grooves, the front side of the support 63 is externally provided with a notch, the clamping blocks 64 are matched with the notch, the connecting ropes 67 are connected between the clamping blocks 64 and the support 63, the guide wheels 62 are used for guiding the connecting ropes 67, the moving end of the welding machine 3 is connected with the clamping rods 65, and the clamping rods 65 can be inserted into the clamping grooves of the clamping blocks 64 so as to fix the clamping blocks 64.

As shown in fig. 15, an elastic fastening structure is disposed at one end of the fastening rod 65 away from the welding machine 3, so that the fastening rod 65 can be fastened at the notch, the elastic fastening structure is composed of two obliquely disposed fastening boards, protrusions are disposed at the tail ends of the fastening boards, the protrusions of the fastening boards can be fastened at the notch, the fastening boards are elastic, and when the fastening boards are extruded, the fastening boards can be made to approach each other, so that the protrusions of the fastening boards are not fastened at the notch.

As shown in fig. 15, the control mechanism further includes an extrusion frame 66 and a diagonal block 651, the diagonal block 651 is connected to the upper and lower sides of the card board, the extrusion frame 66 is connected to the left and right sides of the top of the sliding seat 41, the card rod 65 passes through the extrusion frame 66, and the extrusion frame 66 can extrude the diagonal block 651, so that the card board is retracted.

Initially, the first elastic member 53 is in a stretching state, during the moving process of the moving plate 42, the first welding point of the battery and the tab is contacted with the limiting rod 54 and blocked by the limiting rod 54, at this time, the first welding point of the battery and the tab is also moved to a position opposite to the welding position of the welding machine 3, meanwhile, the clamping block 64 is also moved to a position opposite to the clamping rod 65, then the welding machine 3 can be controlled to move for welding treatment, when the welding machine 3 moves, the pushing block 51 and the clamping rod 65 can be driven to move together, the pushing block 51 no longer blocks the sliding rod 52 after moving, at this time, the sliding rod 52 moves towards the sliding seat 41 under the action of the first elastic member 53, along with the continuing movement of the pushing block 51, the swinging rod 55 can be contacted with the swinging rod 55 and is pressed to swing the swinging rod 55, the limiting rod 54 is pulled out of the moving plate 42 during swinging, the upper iron position of the swinging rod and the magnet of the sliding rod 52 are mutually magnetically attracted after swinging, so that the swinging rod 55 is fixed, the clamping rod 65 can be inserted into the clamping block 64 and clamp the clamping block 64 when moving, then after the first welding is finished, the welding machine 3 is reset, the welding machine 3 can drive the clamping rod 65 and the pushing block 51 to reset when resetting, the clamping rod 65 can pull the clamping block 64 to move when resetting, the clamping block 64 can pull the connecting rope 67 when moving, the connecting rope 67 bypasses the guide wheel 62, the connecting rope 67 is guided by the guide wheel 62, the bracket 63 can be driven to move when the connecting rope 67 moves, the moving plate 42 is pulled to move again until the inclined block 651 of the clamping rod 65 moves to be in contact with the extrusion frame 66 and is extruded by the extrusion frame 66, the clamping block 64 is not clamped by the two clamping plates after the two clamping plates are retracted, at the moment, the second welding point of the battery and the electrode lug also moves to the welding position aligned with the welding machine 3, and then the welding can be performed again, so that when the battery and the electrode lug are welded, the battery and the tab are automatically moved, so that the welding positions of the battery and the tab are positioned, the welding positions are prevented from being deviated, after welding is finished, the movable plate 42 is manually pulled to reset, and the movable plate 42 can be pulled to reset by the clamping block 64 through the connecting rope 67 during resetting.

As shown in fig. 16, the lithium battery lifting device further comprises a lifting mechanism, the lifting mechanism comprises a connecting block 81, a squeezing rod 82, a pushing plate 83 and a lifting plate 84, the connecting block 81 is connected to the middle position of the bottom of the moving plate 42, the connecting block 81 is slidably connected with the sliding seat 41, the squeezing rods 82 are connected to the front side and the rear side of the connecting block 81, the pushing plate 83 capable of pushing up the lithium battery by upward movement is slidably connected to the front side and the rear side of the sliding seat 41, the lifting plate 84 is connected to the bottom of the pushing plate 83, and one side of the lifting plate 84, which is close to the squeezing rod 82, is obliquely arranged, so that the squeezing rod 82 can squeeze the lifting plate 84 to rise through an oblique position when moving, and the pushing plate 83 rises.

In the process of moving the moving plate 42, the connecting block 81 and the extruding rod 82 can be driven to move together, the extruding rod 82 can jack up the pushing plate 83 through the inclined position of the pushing plate 83 in the moving process, the lifting plate 84 can be driven to move upwards when the pushing plate 83 is jacked up, so that the battery and the battery protection plate are lifted, the front side of the battery is propped against the accommodating groove on the front side of the moving plate 42, the moving plate 42 can continuously drive the battery and the battery protection plate to move afterwards, and when the moving plate 42 resets, the battery and the battery protection plate cannot be driven to move, so that the battery and the battery protection plate are dismounted, and when the battery and the battery protection plate are subsequently added for welding, the welded battery and the battery protection plate can be pushed to move.

As shown in fig. 17, the battery welding device further comprises a guiding and limiting frame 9, wherein the guiding and limiting frames 9 are connected to the left side and the right side of the sliding seat 41, and the guiding and limiting frames 9 are used for limiting the battery so as to prevent the battery from shifting in position during welding.

As shown in fig. 17, the battery welding device further comprises a storage platform 10, wherein the rear side of the top of the welding table 1 is connected with the storage platform 10, and the top of the storage platform 10 is connected with the top of the sliding seat 41, so that the welded battery can be conveyed to the storage platform 10 for storage.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.

Claims (8)

1. The utility model provides a battery core protection board welding set of lithium cell, includes welding bench (1), be connected with mount pad (2) on welding bench (1), welding machine (3) are all installed to mount pad (2) both sides, characterized by, but the welding end lateral shifting of welding machine (3), two be equipped with on mount pad (2) between welding machine (3) be used for placing battery core protection board and lithium cell group place bending mechanism, place bending mechanism can be to battery core protection board's tab bending; the placing and bending mechanism comprises a sliding seat (41), the sliding seat (41) is connected to the top of the mounting seat (2), a moving plate (42) is vertically and slidably connected to the sliding seat (41), a containing groove for containing a battery core protection plate is formed in the moving plate (42), turning plates (43) are rotatably connected to the lower parts of two sides of the moving plate (42), when the battery core protection plate is contained in the containing groove, lugs on two sides of the battery core protection plate are respectively located above the turning plates (43) on two sides of the moving plate (42), the turning plates (43) are in sliding fit with the sliding seat (41), guide rods (44) are connected to two sides of the sliding seat (41), guide grooves are formed in the guide rods (44), the guide rods (44) are in sliding connection with the turning plates (43), convex balls (431) are matched with the guide grooves of the guide rods (44), and the moving plates (42) move along the sliding seat (41) so that the convex balls (431) drive the turning plates (43) to be pushed by the guide grooves of the turning plates (43) to rotate, and then the turning plates (43) are rotated; the welding machine is characterized by further comprising a positioning mechanism, wherein the positioning mechanism comprises pushing blocks (51), sliding rods (52), limiting rods (54) and swinging rods (55), the two pushing blocks (51) are respectively connected to the welding ends of the welding machines (3) on two sides, the sliding rods (52) are provided with two sliding rods and are respectively and transversely connected inside the two sides of the sliding seat (41), the sliding rods (52) comprise long vertical rods, short vertical rods and transverse rods, the short vertical rods are arranged on the upper surfaces of the transverse rods, the long vertical rods are positioned at one ends of the transverse rods, an elastic piece I (53) is respectively connected between the short vertical rods of the sliding rods (52) and the end parts on two sides of the sliding seat (41), the transverse rods of the sliding rods (52) are transversely arranged in the sliding seat (41) in a sliding mode, and initially, the elastic piece I (53) is in a stretching state, and the pushing blocks (51) are used for blocking the long vertical rods of the sliding rods (52). The two sides of the sliding seat (41) are internally and transversely connected with limiting rods (54) for limiting the moving plate, swinging rods (55) are arranged between the sliding rods (52) and the limiting rods (54), the swinging rods (55) are hinged with one ends, close to the swinging rods (55), of the limiting rods (54), magnets are arranged on one sides, close to the swinging rods (55), of the two sliding rods (52), and the lower parts of the swinging rods (55) are made of iron and can be in magnetic attraction fit with the magnets; the two swinging rods (55) are vertically arranged inside two sides of the sliding seat (41) respectively, the tops of the swinging rods (55) protrude out of the surface of the sliding seat (41), the sliding seat (41) is rotationally connected with the swinging rods (55), and the swinging rods (55) are located at the moving track of the pushing block (51).

2. The welding device for the battery core protection plate of the lithium battery according to claim 1, further comprising a control mechanism, wherein the control mechanism comprises a connecting rod (61), a support (63) and clamping rods (65), the connecting rod (61) is provided with two connecting rods and is respectively connected to two sides of the top of the sliding seat (41), the connecting rod (61) is rotationally connected with guide wheels (62), the support (63) is provided with two connecting rods and is respectively connected to two sides of the movable plate (42), clamping blocks (64) with clamping grooves are arranged on the support (63), a notch is formed in the front side of the support (63), the clamping blocks (64) are matched with the notch, a connecting rope (67) is connected between the clamping blocks (64) and the support (63), the guide wheels (62) are used for guiding the connecting rope (67), the clamping rods (65) are connected to the movable ends of the welding machine (3), and the clamping rods (65) are used for fixing the clamping blocks (64).

3. The welding device for the battery cell protection plate of the lithium battery according to claim 2, wherein an elastic buckling structure is arranged at one end, far away from the welding machine (3), of the clamping rod (65), so that the clamping rod (65) can be buckled into the notch, the elastic buckling structure is composed of two clamping plates which are obliquely arranged and provided with elasticity, protrusions are arranged at the tail ends of the clamping plates, and the protrusions of the clamping plates can be buckled into the notch.

4. A welding device for a battery cell protection plate of a lithium battery as claimed in claim 3, wherein the control mechanism further comprises an extrusion frame (66) and an inclined block (651), the inclined block (651) is connected to the clamping plate, the extrusion frame (66) is provided with two clamping rods and is respectively connected to the tops of two sides of the sliding seat (41), the clamping rods (65) penetrate through the extrusion frame (66), and the extrusion frame (66) is used for extruding the inclined block (651).

5. The welding device for the battery cell protection plate of the lithium battery according to claim 1, further comprising a jacking mechanism, wherein the jacking mechanism comprises a connecting block (81) and a pushing plate (83) for pushing up the lithium battery pack, the connecting block (81) is connected to the middle position of the bottom of the movable plate (42), the connecting block (81) is slidably connected with the sliding seat (41), two sides of the connecting block (81) are respectively connected with extrusion rods (82), the pushing plate (83) is provided with two pushing plates and is slidably connected with two sides of the sliding seat (41), and the bottom of the pushing plate (83) is connected with lifting plates (84).

6. The welding device for the battery cell protection plate of the lithium battery according to claim 5, wherein one side of the lifting plate (84) close to the extrusion rod (82) is obliquely arranged, so that the extrusion rod (82) can push the lifting plate (84) to lift through an oblique position when moving, and the push plate (83) can lift.

7. The welding device for the battery core protection plate of the lithium battery according to claim 1, further comprising a guiding and limiting frame (9), wherein both sides of the sliding seat (41) are connected with the guiding and limiting frame (9) for limiting the lithium battery pack.

8. The welding device for the battery cell protection plate of the lithium battery according to claim 1, further comprising a storage platform (10), wherein the top of the welding platform (1) is connected with the storage platform (10), and the top of the storage platform (10) is connected with the top of the sliding seat (41).