Secondary packaging production line for soft package battery

Abstract

The invention relates to a secondary packaging production line for a soft package battery. The secondary packaging production line comprises a feeding platform for placing the soft package battery to be exhausted, an exhaust device arranged on the downstream of the feeding platform along a first direction, and a feeding device, the exhaust device comprises 2n exhaust units which are symmetrically arranged with the first direction as the axis. The exhaust unit comprises an upper cavity mechanism and a lower cavity mechanism arranged under the upper cavity mechanism. The lower cavity mechanism can move from a first position under the upper cavity mechanism to a second position along a second direction; when the lower cavity mechanism moves from the first position to the second position, the feeding device moves the to-be-exhausted soft package battery on the feeding platform to the lower cavity mechanism, and then the lower cavity mechanism moves from the second position to the first position; and / or, the feeding device takes away the exhausted soft package battery located in the lower cavity mechanism, and then the lower cavity mechanism is moved to the first position from the second position. The feeding efficiency of the soft package battery can be improved, and the space occupied by equipment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of soft-pack battery production and related supporting equipment, and in particular to a soft-pack battery secondary packaging production line. Background Art

[0002] Soft-pack batteries are widely used in electric vehicles, electric bicycles, smart fixtures and other fields due to their small size, light weight, high safety and flexible design. The production process of soft-pack batteries includes multiple processes such as degassing, trimming, folding and ironing. In order to realize the automated production of secondary packaging of soft-pack batteries, a secondary packaging production line consisting of a feeding device, an exhaust device, a trimming device, a folding device, an ironing device and a feeding device has appeared on the market. In order to degas multiple soft-pack batteries at the same time, the exhaust device in the existing soft-pack battery secondary packaging production line usually includes multiple degassing units. However, the layout of the degassing units in the existing production line is mostly distributed in a straight line in one direction (such as Chinese patent number CN205406654U). When loading, the loading device needs to move the soft-pack batteries one by one to each degassing unit for degassing through the pickup mechanism. Since the degassing units are distributed in a straight line, the round-trip distance of the pickup mechanism of the loading device is long, which increases the time consumption of loading, the production efficiency is low, and a large space is required. Summary of the invention

[0003] Based on this, the object of the present invention is to provide a soft-pack battery secondary packaging production line, which can improve the loading efficiency of the soft-pack battery and reduce the space occupied by the production line by rationally arranging the exhaust unit of the exhaust device.

[0004] A soft-pack battery secondary packaging production line, comprising a loading platform for placing soft-pack batteries to be exhausted, an exhaust device arranged downstream of the loading platform along the first direction, and a loading device capable of moving the soft-pack batteries placed on the loading platform to the exhaust device; the exhaust device comprises 2n exhaust units arranged symmetrically with the first direction as an axis, wherein n≥1; the exhaust unit comprises a fixed upper cavity mechanism, and a lower cavity mechanism arranged directly below the upper cavity mechanism; the lower cavity mechanism can be moved from a first position directly below the upper cavity mechanism to a second position along a second direction, wherein the second direction is perpendicular to the first direction; when the lower cavity mechanism moves from the first position to the second position, the loading device moves the soft-pack batteries to be exhausted located on the loading platform to the lower cavity mechanism, and then the lower cavity mechanism moves from the second position to the first position; and / or, when the lower cavity mechanism moves from the first position to the second position, the loading device takes away the exhausted soft-pack batteries located in the lower cavity mechanism, and then the lower cavity mechanism moves from the second position to the first position.

[0005] The soft-pack battery secondary packaging production line of the present invention arranges multiple exhaust units in the exhaust device symmetrically in pairs, and realizes rapid loading through the cooperation of the movable lower cavity in each exhaust unit and the loading device, thereby shortening the moving distance of the loading device, realizing rapid loading, and improving production efficiency. Moreover, through reasonable layout, the overall space occupied by the secondary packaging production line can be reduced.

[0006] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a top view of the soft-pack battery before secondary packaging;

[0008] Figure 2 This is a top view of the soft-pack battery after the airbag bag is removed;

[0009] Figure 3 This is a side view of the soft-pack battery after the airbag bag is removed;

[0010] Figure 4 A three-dimensional diagram of an embodiment of a soft-pack battery secondary packaging production line of the present invention;

[0011] Figure 5 It is a position relationship diagram of the feeding platform, feeding device and exhaust device in the soft-pack battery secondary packaging production line of the present invention;

[0012] Figure 6 It is a three-dimensional diagram of the exhaust device in the secondary packaging production line of the soft-pack battery of the present invention;

[0013] Figure 7 A three-dimensional diagram of an embodiment of an exhaust device in a soft-pack battery secondary packaging production line of the present invention;

[0014] Figure 8 A three-dimensional diagram (main viewing angle) of a lower cavity mechanism in one embodiment of an exhaust device in a secondary packaging production line for soft-pack batteries of the present invention;

[0015] Fig. 9 A three-dimensional diagram (rear view) of a lower cavity mechanism in one embodiment of an exhaust device in a secondary packaging production line for soft-pack batteries of the present invention;

[0016] Fig.10 A three-dimensional diagram (main viewing angle) of an upper cavity mechanism in an embodiment of an exhaust device in a secondary packaging production line for soft-pack batteries of the present invention;

[0017] Fig.11 A three-dimensional diagram (rear view) of an upper cavity mechanism in an embodiment of an exhaust device in a soft-pack battery secondary packaging production line of the present invention;

[0018] Fig.12A three-dimensional diagram (looking from above) of an upper cavity mechanism in one embodiment of an exhaust device in a secondary packaging production line for soft-pack batteries of the present invention;

[0019] Fig.13 This is a partial enlarged view (looking up) of the upper cavity mechanism structure A in one embodiment of the exhaust device in the secondary packaging production line of the soft-pack battery of the present invention;

[0020] Fig.14 It is a structural schematic diagram of the tray assembly of the lower cavity mechanism in another embodiment of the exhaust device in the secondary packaging production line of soft-pack batteries of the present invention (from a top view);

[0021] Fig.15 This is a partial enlarged view (top view) of the waste liquid discharge port of the lower cavity structure B in another embodiment of the exhaust device in the secondary packaging production line of the soft-pack battery of the present invention;

[0022] Fig.16 It is a partial enlarged view (top view) of the drainage channel of the lower cavity structure B in another embodiment of the exhaust device in the secondary packaging production line of the soft-pack battery of the present invention;

[0023] Fig.17 A three-dimensional diagram of an embodiment of a trimming device in a soft-pack battery secondary packaging production line of the present invention;

[0024] Fig.18 A three-dimensional diagram of an embodiment of a pre-cutting mechanism in a soft-pack battery secondary packaging production line of the present invention;

[0025] Fig.19 A three-dimensional diagram (from another angle) of an embodiment of a pre-cutting mechanism in a soft-pack battery secondary packaging production line of the present invention;

[0026] Fig. 20 It is a structural schematic diagram of an embodiment of a cutting component in a soft-pack battery secondary packaging production line of the present invention;

[0027] Fig.21 A three-dimensional diagram of an embodiment of a cutting assembly installed on a cutting support frame in a soft-pack battery secondary packaging production line of the present invention;

[0028] Fig. 22 A partial enlarged view of an embodiment of a cutting assembly installed on a cutting support frame in a soft-pack battery secondary packaging production line of the present invention;

[0029] Fig.23 A cross-sectional view of a second cutter and a pressing structure of an embodiment of a cutting assembly in a soft-pack battery secondary packaging production line of the present invention;

[0030] Fig.24 A three-dimensional diagram of a carrier and a positioning structure of the carrier in a soft-pack battery secondary packaging production line of the present invention;

[0031] Fig.25 A three-dimensional diagram of an embodiment of a trimming device in a soft-pack battery secondary packaging production line of the present invention;

[0032] Fig.26 A three-dimensional diagram of a first precision cutting mechanism and a second precision cutting mechanism having mirror-image structures in a soft-pack battery secondary packaging production line of the present invention;

[0033] Fig. 27 It is a positional relationship diagram of the pre-cutting mechanism, the first fine cutting mechanism, the second fine cutting mechanism and the cutting transmission mechanism in the trimming device in the secondary packaging production line of the soft-pack battery of the present invention;

[0034] Fig.28 It is a partial enlarged view of the cutting and conveying structure in the trimming device in the soft-pack battery secondary packaging production line of the present invention;

[0035] Fig.29 It is a schematic diagram of the positions of the first folding mechanism, the first ironing mechanism and the conveying mechanism of the folding and ironing device in the secondary packaging production line of the soft-pack battery of the present invention;

[0036] Fig.30 It is a three-dimensional diagram of the first folding mechanism of the folding and ironing device in the secondary packaging production line of the soft-pack battery of the present invention;

[0037] Fig.31 A three-dimensional view (from another angle) of the first folding mechanism of the folding and ironing device in the secondary packaging production line of the soft-pack battery of the present invention;

[0038] Fig.32 A three-dimensional diagram of a first folding component of a folding and ironing device in a secondary packaging production line for soft-pack batteries of the present invention;

[0039] Fig.33 A three-dimensional diagram of a first folding fixture of a folding and ironing device in a secondary packaging production line for soft-pack batteries of the present invention;

[0040] Fig.34 It is a partial enlarged view of the first folding fixture of the folding and ironing device in the secondary packaging production line of the soft-pack battery of the present invention;

[0041] Fig.35 It is a three-dimensional diagram of the first folding plate of the folding and ironing device in the secondary packaging production line of the soft-pack battery of the present invention;

[0042] Fig.36 It is a side view of the soft-pack battery after the first folding mechanism of the folding and ironing device in the secondary packaging production line of the soft-pack battery of the present invention folds the shorter side edge of the soft-pack battery;

[0043] Fig.37It is a side view of the soft-pack battery after the first folding mechanism in the folding and ironing device in the secondary packaging production line of the soft-pack battery of the present invention folds the longer side edge of the soft-pack battery;

[0044] Fig.38 It is a three-dimensional diagram of the first edge-heating mechanism of the edge-folding and edge-heating device in the secondary packaging production line of the soft-pack battery of the present invention;

[0045] Fig.39 A three-dimensional diagram of a conveying mechanism of an edge folding and ironing device in a secondary packaging production line for soft-pack batteries of the present invention;

[0046] Fig.40 It is a three-dimensional diagram of the second folding mechanism of the folding and ironing device in the secondary packaging production line of the soft-pack battery of the present invention;

[0047] Fig.41 It is a partial enlarged view of the second folding mechanism of the folding and ironing device in the secondary packaging production line of the soft-pack battery of the present invention;

[0048] Fig.42 It is a three-dimensional diagram of the second folding fixture of the folding and ironing device in the secondary packaging production line of the soft-pack battery of the present invention;

[0049] Fig.43 It is a structural schematic diagram of the second edge-curing mechanism of the edge-folding and edge-curing device in the soft-pack battery secondary packaging production line of the present invention. DETAILED DESCRIPTION

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0051] Figure 1-3 The specific structures of soft-pack batteries after different process treatments are shown respectively. Figure 1-3 As shown in the figure, the soft pack battery 10 after forming generally includes three parts: the battery body 10a, the air bag 10b and the tab 10c. In order to discharge the gas generated after forming, the soft pack battery 10 needs to be vented. After venting, the air bag 10b of the soft pack battery 10 is removed by the trimming process. After the trimming process is completed, the battery body 10a has two sides along its width direction. Figure 2-3 The side edges 10d shown in the figure need to be folded and ironed to make the side edges 10d close to the battery body 10a to obtain a finished soft-pack battery.

[0052] Figure 4-5 The figure shows an exemplary structure of a soft-pack battery secondary packaging production line of the present invention. The soft-pack battery secondary packaging production line includes a loading platform 1, an exhaust device 3 arranged downstream of the loading platform 1 along a first direction D1, and a loading device 2 for moving the soft-pack battery 10 placed on the loading platform 1 to the exhaust device 3.

[0053] Specifically, Figure 5-6 As shown, the exhaust device 3 includes an exhaust bracket 33, four exhaust units 30 arranged on the exhaust bracket 33, and a lower cavity driving assembly 35 corresponding to the exhaust units 30. The four exhaust units 30 are respectively a first exhaust unit 301, a second exhaust unit 302, a third exhaust unit 303 and a fourth exhaust unit 304, and the four exhaust units 30 are symmetrically arranged in pairs with the first direction D1 as the axis. The first exhaust unit 301 and the second exhaust unit 302 are arranged opposite to each other along the second direction D2 downstream of the loading platform 1, and the third exhaust unit 303 and the fourth exhaust unit 304 are arranged opposite to each other along the second direction D2 downstream of the first exhaust unit 301 and the second exhaust unit 302, wherein the third exhaust unit 303 is adjacent to the first exhaust unit 301, and the fourth exhaust unit 304 is adjacent to the second exhaust unit 302.

[0054] Figure 7 FIG. 1 shows an exemplary structure of an exhaust device in a soft-pack battery secondary packaging production line of the present invention. Figure 5-6 As shown, the exhaust unit 30 includes an upper cavity mechanism 31 fixed on an exhaust bracket 33, and a lower cavity mechanism 32 arranged directly below the upper cavity mechanism 31. The upper cavity mechanism 31 can move up and down in the vertical direction, and when the upper cavity mechanism 31 moves downward, it can cover the top of the lower cavity mechanism 32.

[0055] Specifically, Figure 8-9As shown, the lower cavity mechanism 32 includes a lower cavity base 320 and a tray assembly 322 arranged on the top of the lower cavity base 320. The lower cavity base 320 is specifically square or rectangular, and its top is provided with an annular sealing groove 320a extending in the circumferential direction for placing a sealing ring. The tray assembly 322 consists of a rectangular battery body tray 3220 and a rectangular air bag tray 3222. A long strip of lower head 324 is provided between the battery body tray 3220 and the air bag tray 3222. The lower head 324 is made of metal and is connected to a heating block. A base sliding assembly (not shown) is provided at the bottom of the lower cavity base 320. The base sliding assembly includes at least one slide rail (not shown) parallel to the second direction D2 and a slider (not shown) that slides with the slide rail. The slider is slidably connected to the slide rail, and the lower cavity base 320 is fixedly connected to the slider. The lower cavity base 320 can move back and forth along the second direction D2 through the base sliding assembly (not shown).

[0056] Each lower cavity driving assembly 35 is arranged on one side of the corresponding exhaust unit 30, and is used to drive the corresponding lower cavity base 320 to move back and forth along the second direction D2. The lower cavity driving assembly 35 includes two transmission wheels (not shown) distributed along the second direction D2, a transmission belt (not shown) sleeved on the outer peripheral side of the two transmission wheels (not shown) and driving in cooperation with the transmission wheels, a clamping block (not shown) clamping the transmission belt and fixedly connected to the lower cavity base 320, and a base driving motor 350 rotating with one of the transmission wheels. The base driving motor 350 has an output shaft, which is fixedly connected to the axis of the transmission wheel to drive the transmission wheel (not shown) to rotate, and then drive the transmission belt to rotate. Under the cooperative transmission of the transmission belt and the clamping block on the transmission belt, the lower cavity base 320 is driven from a first position located directly below the upper cavity mechanism 31 along the second direction D2 to a second position located at the symmetry axis of the two exhaust units 30, that is, the lower cavity bases 320 of the two symmetrically arranged exhaust units 30 move to the same position.

[0057] The loading device 2 includes a loading bracket 20, a first transfer robot 221 and a second transfer robot 222 slidably arranged on the loading bracket 20, and a first transfer linear motor and a second transfer linear motor driving the first transfer robot 221 and the second transfer robot 222 to move back and forth along the first direction D1. The first transfer robot 221 is close to the loading platform 1, and the second transfer robot 222 is away from the loading platform 1. The first transfer robot 221 and the second transfer robot 222 both have a transfer adsorption assembly (not shown) that can adsorb the soft-pack battery 10, and the transfer adsorption assembly includes a plurality of suction cups (not shown) with adsorption ports facing downward, and these suction cups are connected to a vacuum pump (not shown) to generate adsorption force on the soft-pack battery 10. The first transfer robot 221 can be moved to the top of the loading platform 1, and move the soft-pack batteries 10 to be exhausted on the loading platform 1 to the lower cavity base 320 of each exhaust unit 30, while the second transfer robot 22 unloads or moves the exhausted soft-pack batteries 10 on each lower cavity base 320 to the next functional device of the production line for other process processing. The following takes the first exhaust unit 301 and the second exhaust unit 302 as an example to illustrate the working process of the loading device 2 and the exhaust device 3 cooperating in loading:

[0058] When loading, the soft-pack battery 10 to be exhausted is first placed on the loading platform 1, and then the lower cavity driving assembly 35 corresponding to the first exhaust unit 301 drives the lower cavity base 320 to move from the first position to the second position. At this time, the first transfer robot 221 absorbs the soft-pack battery 10 from directly above the loading platform 1, and then moves to the upper part of the lower cavity base 320 located at the second position, and places the soft-pack battery 10 to be exhausted on the tray assembly 322 of the lower cavity base 320. Then, the lower cavity base 320 is driven by the lower cavity driving assembly 35 and moves back to the first position, and the soft-pack battery 10 is exhausted with the cooperation of the upper cavity mechanism 31 and the lower cavity mechanism 32. After placing the soft-pack battery 10 on the lower cavity base 320, the first transfer robot 221 also moves back to the upper part of the loading platform 1 to re-take the material. When the lower cavity base 320 of the first exhaust unit 301 moves to the first position, the lower cavity base 320 of the second exhaust unit 302 symmetrically arranged therewith moves from the first position to the second position. At the same time, the first transfer robot 221 takes material from the loading platform 1 again, and then moves to the top of the lower cavity base 320 of the second exhaust unit 302 located at the second position, and places the soft-pack battery 10 to be exhausted on the lower cavity base 320. Then, the lower cavity base 320 is moved to the first position again to exhaust the soft-pack battery 10.

[0059] In the above-mentioned loading process, the lower cavity base 320 of the first exhaust unit 301 and the lower cavity base 320 of the second exhaust unit 302 move between the corresponding first position and the second position alternately, that is, when the lower cavity base 320 of the first exhaust unit 301 moves from the second position to the first position, the lower cavity base 320 of the second exhaust unit 302 moves from the first position to the second position, and vice versa. In this way, by alternately moving between the lower cavity bases 320 of the two exhaust units 30 to achieve alternate loading, the loading speed can be increased, and at the same time, the two lower cavity bases 320 are prevented from moving to the second position at the same time to cause a collision. Similarly, the symmetrically arranged third exhaust unit 303 and fourth exhaust unit 304 also move their two lower cavity bases 320 between the first position and the second position alternately.

[0060] After the soft-pack battery 10 is exhausted by the first exhaust unit 301, the lower cavity base 320 of the first exhaust unit 301 moves the soft-pack battery 10 from the first position to the second position. At this time, the second transfer robot 222 moves to the upper part of the lower cavity base 320 of the first exhaust unit 301 and takes away the soft-pack battery 10, unloads or moves it to the next functional device to continue other process processing, and then the lower cavity base 320 of the first exhaust unit 301 waits for the first transfer robot 221 to reload at the second position. Of course, only one transfer robot can be set on the transfer bracket, that is, one transfer robot performs loading and unloading at the same time, but in comparison, the collaborative work of two transfer robots is more conducive to improving the efficiency of loading.

[0061] In this way, by symmetrically arranging the 2n (n≥1) exhaust units 30 in the exhaust device 3 along the conveying direction of the soft-pack battery 10, the moving distance of the transfer robot of the loading device 2 when loading or unloading can be reduced, thereby reducing the time consumption of loading and unloading. Taking the above embodiment as an example, when the loading device 2 performs loading on the exhaust unit 30 with the farthest distance, the first transfer robot 221 only needs to move 2 stations (one lower cavity base 320 is one station) along the first direction D1 to achieve loading, and after completing the loading, it only needs to move 2 stations to return to the top of the loading platform 1 to re-take the material. If the four exhaust units 30 are arranged in a straight line along the first direction D1, when the loading device 2 performs loading on the exhaust unit 30 that is farthest away, the first transfer robot 221 needs to move 4 stations along the first direction D1 to realize loading. Similarly, after loading is completed, 4 stations need to be moved to retrieve the material again. This greatly increases the loading time. In addition, the multiple exhaust units 30 are arranged in a straight line, which means that a longer factory space is required to assemble the complete production line, which occupies a large space.

[0062] After the lower cavity base 320 of the exhaust unit 30 moves the soft-pack battery 10 to be exhausted to the first position, the lower cavity mechanism 32 cooperates with the upper cavity mechanism 31 to exhaust the airbag bag 10b of the soft-pack battery 10. Figure 10-16 As shown, the upper cavity mechanism 31 of the exhaust unit 30 includes an upper cavity fixing plate 312 fixed on the exhaust bracket 33, an exhaust lifting cylinder 314 installed on the upper cavity fixing plate 312, and an upper cavity cover 310 fixedly connected to the output end of the exhaust lifting cylinder 314. Here, the output end of the exhaust lifting cylinder 314 can be directly connected to the top of the upper cavity cover 310, or it can be indirectly connected through other components. In this embodiment, the output end of the exhaust lifting cylinder 314 is vertically downward in the vertical direction and is indirectly connected to the upper cavity cover 310 through a connecting frame 316. The connecting frame 316 specifically includes an upper cavity movable plate 3160, an upper cavity mounting plate 3164 located below the upper cavity movable plate 3160, and an upper cavity side plate 3162 located between the upper cavity movable plate 3160 and the upper cavity mounting plate 3164 and fixedly connected to the upper cavity movable plate 3160 and the upper cavity mounting plate 3164 respectively. Among them, the upper cavity mounting plate 3164 is fixed on the top of the upper cavity cover 310, and the output end of the exhaust lifting cylinder 314 is fixedly connected to the upper cavity movable plate 3160. When the exhaust lifting cylinder 314 is working, it drives the upper cavity cover 310 to move up and down by driving the connecting frame 316.

[0063] The upper cavity cover 310 is a square or rectangular body that matches the shape of the lower cavity base 320, and has a accommodating cavity 310a with an opening facing downward. When the exhaust lifting cylinder 314 drives the upper cavity cover 310 to move downward, the upper cavity cover 310 covers the lower cavity base 320, so that the accommodating cavity 310a forms a sealed chamber. In order to ensure that the upper cavity cover 310 accurately covers the lower cavity base 320, it can be as follows Fig.11As shown, four exhaust guide shafts 318 extending in the vertical direction are arranged at the four corners of the upper cavity fixing plate 312, and the lower ends of the exhaust guide shafts 318 are fixedly connected to the top of the upper cavity cover 310, and guide sleeves 317 slidingly cooperating with the exhaust guide shafts 318 are arranged on the upper cavity fixing plate 312 to ensure that there is no displacement when the exhaust lifting cylinder 314 drives the upper cavity movable plate 3160 to move downward. The sealed chamber is connected to a vacuum pumping mechanism (not shown) to vacuum the sealed chamber, and the sealed chamber is also connected to a vent valve 326. When vacuuming, the vent valve 326 is in a closed state to form a sealed chamber; when the exhaust is completed, the vent valve 326 is opened to introduce air or other gas into the sealed chamber to facilitate the separation of the upper cavity cover 310 from the lower cavity base 320. The accommodating cavity 310a is provided with an upper sealing head 3104 corresponding to the lower sealing head 324 and a bayonet 3100 located just above the airbag bag tray 3222. The number of the bayonet 3100 can be one or more. Figure 12-14 As shown, multiple bayonets 3100 are provided. In this embodiment, the number of bayonets 3100 is 9 and they are arranged in a row along the length direction of the upper sealing head 3104. Compared with the traditional puncture needle, the bayonet 3100 of this embodiment has a larger cross-sectional area, which can form a larger puncture hole on the airbag bag 10b, which is conducive to the rapid discharge of gas. Specifically, the cross-sectional area of ​​the bayonet 3100 is polygonal. The long upper sealing head 3104 is made of metal and is connected to a heating block.

[0064] When the upper cavity mechanism 31 moves downward and forms a sealed chamber with the lower cavity mechanism 32 , the vacuum mechanism (not shown) is started to evacuate the sealed chamber, and the bayonet 3100 pierces the airbag bag 10 b to exhaust the air in the soft-pack battery 10 .

[0065] However, due to the limited force of vacuuming, in order to ensure that all the air in the soft-pack battery 10 is exhausted, the vacuuming time needs to be extended. In order to speed up the exhaust speed of the soft-pack battery 10, an extrusion piece 3102 that can move up and down in the vertical direction is also provided in the accommodating cavity 310a. The extrusion piece 3102 is a square or rectangular plate-like structure, which is directly opposite to the battery body tray 3220. In order to realize the up and down movement of the extrusion piece 3102 in the vertical direction, the upper cavity mechanism 31 includes an extrusion piece driving cylinder 3103 arranged above the upper cavity cover 310, and the output end of the extrusion piece driving cylinder 3103 passes downward through the top of the upper cavity cover 310 and is fixedly connected to the extrusion piece 3102 to drive the extrusion piece 3102 to move up and down.

[0066] Before the exhaust unit 30 works, the soft-pack battery 10 is placed on the tray assembly 322 of the lower cavity base 320 through the loading device 2, wherein the battery body 10a of the soft-pack battery 10 is located above the battery body tray 3220, and the airbag bag 10b spans the lower head 324 and is located above the airbag bag tray 3222, and then the upper head 3104 and the lower head 324 are preheated by the heating block. When the exhaust unit 30 works, the upper cavity cover 310 is driven by the exhaust lifting cylinder 314 to move downward to cover the top of the lower cavity base 320, so that the accommodating cavity 310a of the upper cavity cover 310 forms a sealed chamber. Then, the sealed chamber is evacuated by a vacuum pumping mechanism (not shown). The bayonet 3100 punctures the airbag bag 10b during the downward movement of the upper cavity cover 310 to form a puncture hole; then, the extrusion member drives the cylinder 3103 to drive the extrusion member 3102 to squeeze the battery body 10a, so that the gas in the battery body 10a is quickly discharged from the puncture hole, and the exhausted air is sucked away by the vacuum pumping mechanism (not shown). After all the gas in the battery body 10a is exhausted, the upper head 3104 and the lower head 324 cooperate to form a linear isolation seal between the puncture hole and the battery body 10b. In this way, the extrusion of the battery body 10a by the extrusion member 3102 accelerates the exhaust of gas, shortens the exhaust time, and improves production efficiency. After the exhaust is completed, air or other gas is introduced into the sealed chamber through the vent valve 326, and the upper cavity cover 310 can be separated from the lower cavity base 320, ready for the exhaust treatment of the next soft pack battery 10.

[0067] Furthermore, if Fig.13 As shown, each bayonet 3100 is arranged at a position adjacent to the extrusion piece 3102, so that the distance between the puncture hole formed by the bayonet 3100 in the airbag bag 10b and the battery body 10a can be shortened, thereby accelerating the speed of gas discharge.

[0068] When the bayonet 3100 punctures the airbag bag 10b, part of the electrolyte will flow out from the puncture hole. To ensure that the upper cavity cover 310 completely covers the lower cavity base 320, the bayonet 3100 punctures the airbag bag 10b again to prevent the electrolyte from overflowing everywhere, the upper cavity mechanism 31 of the exhaust device 3 also includes a bayonet driving cylinder 3101 arranged on the upper cavity mounting plate 3164, and each bayonet 3100 linearly arranged in the accommodating cavity 310a is fixed at the bottom of a connecting block (not shown in the figure), and the output end of the bayonet driving cylinder 3101 passes through the top of the upper cavity cover 310 and is fixedly connected to the connecting block (not shown in the figure) to drive each bayonet 3100 to move downward at the same time. When the upper cavity cover 310 is covered on the lower cavity base 320 to form a closed chamber, the bayonet driving cylinder 3101 drives each bayonet 3100 to move downward at the same time to pierce the airbag bag 10b; then, the extrusion member driving cylinder 3103 drives the extrusion member 3102 to the battery body 10a to accelerate the gas discharge speed. In this way, it can be ensured that the electrolyte will not overflow from the sealed chamber. Here, the vacuuming mechanism (not shown) can start to vacuum the closed chamber after the bayonet 3100 pierces the airbag bag 10b, or it can vacuum the closed chamber before the bayonet 3100 pierces the airbag bag 10b. In this embodiment, vacuuming is first performed, and then a puncture is formed in the airbag bag 10b.

[0069] Preferably, the accommodating cavity 310a of the upper cavity cover 310 is also horizontally provided with an airbag bag pressing plate 3106. The airbag bag pressing plate 3106 is rectangular and is located directly below the bayonet 3100. The airbag bag pressing plate 3106 is provided with a bayonet through hole 3106a corresponding to the bayonet 3100, which can allow the bayonet 3100 to pass in and out. When the upper cavity cover 310 and the lower cavity base 320 form a sealed chamber, the airbag bag pressing plate 3106 abuts against the airbag bag 10b, and the bayonet driving cylinder 3101 drives the bayonet 3100 to pass through the bayonet through hole 3106a to pierce the airbag bag 10b. After completion, the bayonet 3100 is driven to move upward and retreat into the bayonet through hole 3106a. In this way, the bayonet 3100 can smoothly pierce the airbag 10b by the airbag pressing plate 3106 pressing against the airbag 10. Preferably, both ends of the airbag pressing plate 3106 along the length direction are elastically connected to the top wall of the accommodating cavity 310a through springs, so that the airbag pressing plate 3106 has a certain buffer elasticity in the vertical direction to adapt to airbags 10b of different volumes.

[0070] Furthermore, the upper cavity mechanism 31 of the exhaust device 3 further includes an upper head drive cylinder 3105 disposed on the upper cavity mounting plate 3164. The output end of the upper head drive cylinder 3105 passes through the top of the upper cavity cover 310 and is fixedly connected to the upper head 3104 to drive the upper head 3104 to move downward. When the gas in the battery body 10b is completely exhausted, the upper head drive cylinder 3105 drives the upper head 3104 to move downward, pressing the airbag bag 10b against the lower head 324, and forming an isolation seal on the airbag bag 10b.

[0071] During the operation of the exhaust device 3, due to the squeezing of the squeezing member 3102, part of the electrolyte will overflow from the punctured hole of the airbag bag 10b. In order to collect the overflowed electrolyte, the exhaust device further includes a liquid storage tank 34 connected to the lower cavity mechanism 32. Figure 14-16 As shown, the air bag tray 3222 is divided into two layers, the upper layer is provided with a waste liquid collection port 3222a that can engage the bayonet 3100 at the position opposite to the bayonet 3100, the lower layer is provided with a waste liquid collection cavity 3222b connected to each waste liquid collection port 3222a, and the lower cavity base 320 is provided with a waste liquid discharge port 320b connected to the waste liquid collection cavity 3222b, and a waste liquid collection channel is formed in the lower cavity mechanism 32 through the interconnected waste liquid collection port 3222a, waste liquid collection cavity 3222b and waste liquid discharge port 320b. The liquid inlet of the liquid storage tank 34 is connected to the waste liquid discharge port 320b through a pipeline, and the air extraction port of the liquid storage tank 34 is connected to the vacuum extraction mechanism (not shown). In this way, when the bayonet 3100 moves downward to pierce the upper and lower surfaces of the airbag bag 10b, under the suction action of the vacuum mechanism (not shown) and the action of gravity, the gas and electrolyte in the airbag bag 10b are discharged from the lower surface of the airbag bag 10b, and are collected in the liquid storage tank 34 through the waste liquid collection channel.

[0072] Furthermore, an annular drainage groove 3222c connected to the waste liquid collection port 3222a is also provided on the top of the airbag bag tray 3222 to collect the electrolyte that flows to the periphery of the airbag bag tray 3222 during the process of puncturing the airbag bag.

[0073] In order to trim the exhausted soft-pack battery 10a, the soft-pack battery secondary packaging production line further includes a trimming device 4 disposed downstream of the exhaust device 3 along the first direction D1. Fig.17 FIG. 1 shows an exemplary structure of a trimming device in a soft-pack battery secondary packaging production line of the present invention. Fig.17As shown, the trimming device 4 includes a pre-cutting mechanism 40, a fine-cutting mechanism 41, and a first conveying mechanism 46. Among them, there are two fine-cutting mechanisms 41, namely a first fine-cutting mechanism 42 and a second fine-cutting mechanism 44. The first fine-cutting mechanism 42 and the second fine-cutting mechanism 44 are sequentially arranged downstream of the pre-cutting mechanism 40 along the first direction D1. The first fine-cutting mechanism 42 and the second fine-cutting mechanism 44 are mirror structures with the first direction D1 as the symmetry axis, so as to further fine-cut the two side edges 10c of the soft-pack battery 10 with the airbag bag 10b cut off along the first direction D1. The first conveying mechanism 46 is used to transfer the soft-pack battery 10 of the pre-cutting mechanism 40 to the carrier 4000 of the first fine-cutting mechanism 42 for the first fine-cutting; after completion, the first conveying mechanism 46 transfers the soft-pack battery 10 placed on the carrier 4000 of the first fine-cutting mechanism 42 to the carrier 4000 of the second fine-cutting mechanism 44 for the second fine-cutting; after completion, the first conveying mechanism 46 transfers the soft-pack battery 10 to the next functional device.

[0074] Figure 18-24 FIG. 1 shows an exemplary structure of a pre-cutting mechanism in a soft-pack battery secondary packaging production line of the present invention. Figure 18-19 As shown, the pre-cutting mechanism 40 includes a supporting base plate 401, a carrier 4000 and a cutting support frame 402 arranged on the supporting base plate 401, and a cutting assembly 400 installed on the cutting support frame 402, wherein the carrier 4000 is located on one side of the cutting support frame 402 along the second direction D2.

[0075] like Figure 21-22 As shown, the cutting assembly 400 includes a first cutter 4001 and a second cutter 4002 that are arranged opposite to each other, and a second cutter driving structure connected to the second cutter 4002 and used for driving the second cutter 4002 to move downward toward the first cutter 4001.

[0076] Specifically, the first cutter 4001 has a loading surface 4001a that can abut against the workpiece and a cutting surface 4001b that is perpendicular to the loading surface 4001a. The second cutter driving structure includes a second cutter driving cylinder 40040, and the movable rod of the second cutter driving cylinder 40040 is vertically downward and connected to the second cutter 4002. When cutting, the workpiece is placed on the loading surface 4001a and extends between the second cutter 4002 and the first cutter 4001. The second cutter driving cylinder 40040 drives the second cutter 4002 to move along the working surface P parallel to the cutting surface 4001b toward the first cutter 4001, and the part of the workpiece placed on the loading surface 4001a that protrudes from the cutting surface 4001b is cut off.

[0077] Since the area of ​​the loading surface 4001a of the first cutter 4001 is limited, the soft-pack battery 10 placed on the loading surface 4001a is easy to shake. Therefore, in order to fix the position of the soft-pack battery 10 before cutting to ensure accurate cutting, the cutting assembly 400 also includes a clamping structure 4006 arranged on the second cutter 4002. The clamping structure 4006 specifically includes a cutting pressure plate 40060, which is located on the side of the second cutter 4002 close to the first cutter 4001 in a direction parallel to the loading surface 4001a, and can slide up and down relative to the second cutter 4002. The cutting pressure plate 40060 protrudes from the second cutter 4002 in the direction in which the second cutter 4002 moves toward the first cutter 4001. The bottom surface of the cutting pressure plate 40060 is a pressing surface 40060a parallel to the loading surface 4001a of the first cutter 4001. When the second cutter 4002 moves toward the first cutter 4001 along the working surface P, the pressing surface 40060a of the cutting plate 40060 first contacts the loading surface 4001a of the first cutter 4001. In this way, when the airbag bag 10b of the soft-pack battery 10 to be cut is placed on the loading surface 4001a, the cutting plate 40060 contacts the workpiece before the second cutter 4002, and cooperates with the loading surface 4001a of the first cutter 4001 to clamp the workpiece, and then the second cutter 4002 continues to move toward the first cutter 4001 along the working surface P relative to the cutting plate 40060, and cooperates with the cutting surface 4001b of the first cutter 4001 to cut off the part of the workpiece protruding from the cutting surface 4001b.

[0078] In practical applications, the cutting assembly 400 can be installed in Fig.21 The cutting support frame 402 shown in the figure, specifically, the cutting support frame 402 can be installed on the supporting bottom plate 401, and the cutting support frame 402 includes a lower support plate 4021, an upper support plate 4022 located above the lower support plate 4021, and a vertical support plate 4024 respectively connecting the lower support plate 4021 and the upper support plate 4022. The first cutter 4001 is installed on the lower support plate 4021, and the cylinder body of the second cutter driving cylinder 40040 is installed on the upper support plate 4022, and its movable rod is vertically downward and fixedly connected with the second cutter 4002 to drive the second cutter 4002 to cooperate with the first cutter 4001 to cut the workpiece. Preferably, a waste discharge bucket 406 can be provided on the side of the first cutter 4001 close to its cutting surface 4001b to collect the cut waste.

[0079] During the cutting process of the airbag bag 10b, the cutting accuracy often affects the quality of the final product. The cutting accuracy is often affected by the gap between the second cutter 4002 and the first cutter 4001 at the moment of cutting. The smaller the gap, the higher the cutting accuracy; conversely, the lower the cutting accuracy. To reduce the gap between the second cutter 4002 and the first cutter 4001, it is necessary to ensure that the second cutter 4002 does not deviate in position when moving toward the first cutter 4001. In order to reduce or even eliminate the position deviation of the second cutter 4002 during the movement, Fig.21 The second cutter driving structure shown also includes a cutting movable plate 40042 horizontally arranged and fixed at the front end of the movable rod of the second cutter driving cylinder 40040, a cutting guide post 40044 arranged in the vertical direction and penetrating the cutting movable plate 40042, a guide post (not shown) sleeved on the outer peripheral side of the cutting guide post 40044 and capable of sliding up and down relative to the cutting guide post 40044 along the axial direction of the cutting guide post 40044, and a guide sleeve 40048 used in conjunction with the guide post (not shown) and capable of sliding up and down relative to the guide post (not shown) along the axial direction of the cutting guide post 40044. The axial direction of the cutting guide post 40044 is parallel to the direction in which the second cutter 4002 moves toward the first cutter 4001. The guide sleeve 40048 is fixedly connected to the cutting movable plate 40042, the second cutter 4002 is vertically fixed on the cutting movable plate 40042, and the movable rod of the second cutter driving cylinder 40040 is fixedly connected to the cutting movable plate 40042 to drive the cutting movable plate 40042 to move up and down. The friction and clearance between the cutting guide column 40044 and the guide column (not shown) and the guide sleeve 40048 ensure that the second cutter 4002 will not shift during the downward movement. In this way, the gap between the second cutter 4002 and the first cutter 4001 at the moment of cutting can be reduced as much as possible, thereby ensuring the accuracy of cutting, which is beneficial to improving the quality of battery products. Preferably, as Fig.18 and 21 As shown, a guide post limit spring 40049 is also sleeved on the outer peripheral side of the lower part of the cutting guide post 40044 to limit the downward sliding stroke of the guide post (not shown) and prevent the guide post (not shown) from detaching from the guide sleeve 40048 during the downward movement.

[0080] To achieve the sliding of the cutting plate 40060 relative to the second cutting knife 4002, Fig. 22As shown, at both ends of the second cutter 4002 along its length direction, there are fixedly connected limiting plates 40062 with an "L"-shaped cross section, and both ends of the second cutter 4002 and the cutting plate 40060 are accommodated in the recessed positions of the two "L"-shaped limiting plates 40062, wherein the second cutter 4002 is fixed to the cutting movable plate 40042, and the cutting plate 40060 is located between the second cutter 4002 and the limiting plates 40062, and slides up and down in the vertical direction. In this embodiment, the friction between the cutting plate 40060 and the second cutter 4002 and the limiting plates 40062 respectively prevents the cutting plate 40060 from falling due to its own action. Fig.21 In addition to the method shown, a slide rail extending up and down in the vertical direction can also be set on the second cutter 4002 (or the cutting plate 40060), and a slider compatible with the slide rail can be set on the cutting plate 40060 (or the second cutter 4002). In this way, the cutting plate 40060 can also slide up and down relative to the second cutter 4002, which is not a sole limitation here.

[0081] In order to better fix the relative position of the cutting plate 40060 and the second cutting knife 4002, and to reset the cutting plate 40060 after cutting the workpiece, the clamping structure 4006 also includes a plate reset elastic member 40064. Fig. 22As shown, a side portion of the second cutter 4002 close to the cutting plate 40060 is provided with a receiving groove 4002a, and a position of the cutting plate 40060 opposite to the receiving groove 4002a is provided with a receiving hole 40060a, and the receiving groove 4002a and the receiving hole 40060a form a receiving cavity for receiving the plate reset elastic member 40064. The plate reset elastic member 40064 in the receiving cavity extends vertically, and its upper end is fixedly connected to the second cutter 4002 and abuts against the cutting plate 40060, and its lower end abuts against the second cutter 4002 and the cutting plate 40060, respectively. In this way, by the pressure plate reset elastic member 40064 being fixedly connected to the second cutter 4002 and abutting against the cutting pressure plate 40060, the position of the cutting pressure plate 40060 in the vertical direction can be limited to prevent the cutting pressure plate 40060 from falling; in addition, by the abutment of the pressure plate reset elastic member 40064 with the second cutter 4002 and the cutting pressure plate 40060, the second cutter 4002 can continue to move downward relative to the cutting pressure plate 40060 when the cutting pressure plate 40060 is pressed against the airbag bag 10b placed on the loading surface 4001a of the first cutter 4001, so as to cut the workpiece. In this process, the pressure plate reset elastic member 40064 is compressed; after the cutting is completed, the second cutter 4002 moves upward in the vertical direction, and the cutting pressure plate 40060 is reset under the elastic action of the pressure plate reset elastic member 40064 for the next cutting. Of course, in order to increase the contact area between the upper and lower ends of the pressing plate reset elastic member 40064 and the second cutter 4002 and the cutting pressing plate 40060, the upper and lower ends of the pressing plate reset elastic member 40064 can be respectively provided with Fig. 22 The elastic member abutment block 40066 shown enables both ends of the pressure plate reset elastic member 40064 to better receive / apply force.

[0082] The carrier 4000 is a rectangular body, which is located on the other side of the first cutter 4001 parallel to its loading surface 4001a relative to the second cutter 4002. A positioning structure is provided on the carrier 4000 for positioning the soft pack battery 10 placed on the carrier 4000. The positioning structure includes a first side positioning component and a second side positioning component. Specifically, Fig.24The first side positioning assembly includes two first side positioning blocks 40081, which are respectively arranged on the two opposite sides of the platform 4000 along the second direction D2, and the distance between the two first side positioning blocks 40081 is adjustable. In order to achieve the adjustable distance between the two first side positioning blocks 40081, at least one first side positioning block 40081 can move back and forth along the second direction D2, specifically: the first side positioning assembly also includes a first side positioning cylinder (not shown), a first positioning rail (not shown) arranged at the lower part of the platform 4000 and extending along the second direction D2, and a first positioning slider (not shown) sliding in cooperation with the first positioning rail. The first side positioning block 40081 is fixed on the first positioning slide rail, and the movable rod of the first side positioning cylinder is fixedly connected to the first side positioning block 40081 to drive the first side positioning block 40081 to move back and forth along the second direction D2. In this way, the position of the workpiece placed on the carrier 4000 along the first direction D1 can be limited by the cooperation of the two first side positioning blocks 40081; similarly, in order to achieve the adjustable distance between the two second side positioning blocks 40082, at least one second side positioning block 40082 can move back and forth along the first direction D1. Movement, the second side positioning assembly includes two second side positioning blocks 40082, and the two second side positioning blocks 40082 are respectively arranged on the opposite side sides of the platform 4000 along the first direction D1, wherein at least one second side positioning block 40082 can move back and forth along the first direction D1, specifically: the second side positioning assembly also includes a second side positioning cylinder (not shown), a second positioning slide rail (not shown) arranged at the lower part of the platform 4000 and extending along the first direction D1, and a positioning slider (not shown) sliding in cooperation with the second positioning slide rail. The second side positioning block 40082 is fixed on the second positioning rail, and the movable rod of the second side positioning cylinder is fixedly connected to the second side positioning block 40082 to drive the second side positioning block 40082 to move back and forth along the second direction D2. In this way, through the cooperation of the two second side positioning blocks 40082, the position of the soft-pack battery 10 placed on the carrier 4000 along the second direction D2 can be limited, and finally the soft-pack battery 10 can be accurately positioned to ensure the accuracy of cutting. Among them, the second direction D2 is perpendicular to the first direction D1.

[0083] When in use, the battery body 10a of the soft-pack battery 10 is first placed on the carrier 4000, and then the airbag bag 10b to be cut is placed between the second cutter 4002 and the first cutter 4001, and abuts against the object-carrying surface 4001a of the first cutter 4001. The second cutter driving structure drives the second cutter 4002 to move downward, and cooperates with the first cutter 4001 to cut the airbag bag 10b. Since some electrolyte may still remain in the airbag bag 10b, in order to prevent the electrolyte from dripping onto the supporting bottom plate 401 and flowing everywhere when the airbag bag 10b is cut, a liquid receiving box 408 can also be provided on the supporting bottom plate 401 to collect the dripping electrolyte.

[0084] Furthermore, in order to adapt to soft-pack batteries 10 of different sizes and facilitate the transfer of soft-pack batteries 10 between the pre-cutting mechanism 40 and its upstream exhaust device 3 and the downstream first fine-cutting mechanism 42. The above-mentioned pre-cutting mechanism 40 also includes a stage moving assembly, which is used to drive the stage 4000 to move back and forth along the second direction D2. The stage moving assembly specifically includes two parallel stage slide rails 4040 arranged on the supporting base plate 401 and a stage slider 4042 that slides with the stage slide rails 4040, respectively arranged at both ends of the stage slide rails 4040 along the second direction D2, and a stage transmission belt 4046 that is sleeved on the outer peripheral side of the two stage transmission wheels 4044 and cooperates with the stage transmission wheels 4044 for transmission, a stage drive clamping block 4049 that clamps the stage transmission belt 4046, and a stage drive motor 4048. The stage driving motor 4048 has an output shaft, which is fixedly connected to the axis of one of the stage transmission wheels 4044 to drive the stage transmission wheel 4044 to rotate. The stage 4000 is fixed on the stage slider 4042 and fixedly connected to the stage driving clamping block 4049.

[0085] The platform 4000 will pass through three stations when moving along the second direction D2, namely, the loading station, the cutting station and the unloading station. When in use, the soft-pack battery 10 to be cut is placed on the platform 4000 at the loading station, and then the platform drive motor 4048 is started. The platform drive motor 4048 drives the platform transmission wheel 4044 and the platform transmission belt 4046 to rotate, driving the platform drive clamping block 4049 to move along the second direction D2, and then drives the platform 4000 to move along the second direction D2 to the position of the first cutter 4001 and the second cutter 4002, until the soft-pack battery 10 is transferred to the preset cutting station, the platform 4000 stops conveying, and then the airbag bag 10b is cut off by the cutting component 400, and the cut airbag bag 10b is collected in the waste discharge barrel 406. Then, the carrier 4000 moves the cut soft-pack battery 10 to the unloading station along the second direction D2, and then moves the soft-pack battery 10 to the first fine-cutting mechanism 42 through the first conveying mechanism 46 .

[0086] Furthermore, since the platform 4000 moves along the second direction D2, the soft-pack battery 10 placed on the platform 4000 is prone to shaking or even shifting. In order to prevent the soft-pack battery 10 placed on the platform 4000 from shifting, the platform 4000 is also provided with an adsorption structure (not shown). The adsorption structure (not shown) is specifically a plurality of adsorption through holes provided on the top surface of the platform 4000 and a vacuum device connected to the adsorption through holes. The vacuum device is used to evacuate the adsorption through holes to generate negative pressure, and an adsorption force is generated on the soft-pack battery 10 to fix the position of the soft-pack battery 10 on the platform 4000.

[0087] Fig.25 The specific structure of an embodiment of the first precision cutting mechanism in the secondary packaging production line of the soft-pack battery of the present invention is shown. The difference between the first precision cutting mechanism 42 and the pre-cutting mechanism 40 is that the first precision cutting mechanism 42 does not have a carrier moving component, and the carrier 4000 of the first precision cutting mechanism 42 is not provided with an adsorption structure. Therefore, the carrier 4000 of the precision cutting mechanism 41 cannot move along the first direction D1. Since the carrier 4000 cannot move and the airbag bag 10b with a larger area has been cut off, there is no need to set an adsorption structure for fixing the soft-pack battery 10 on the carrier 4000 (not shown). Since the working principle of the first precision cutting mechanism 42 for cutting the soft-pack battery 10 is the same as that of the pre-cutting mechanism 40, it will not be repeated here; and the second precision cutting mechanism 44 and the first precision cutting mechanism 42 are mirror-symmetrical structures, and its working principle is also the same as that of the first precision cutting mechanism 42, so it will not be repeated here.

[0088] like Fig.28 As shown, the first conveying mechanism 46 specifically includes a first conveying bracket 460 arranged on one side of the pre-cutting mechanism 40, the first fine-cutting mechanism 42 and the second fine-cutting mechanism 44 along the second direction D2, and a first conveying robot 462 slidably connected to the first conveying bracket 460. The first conveying robot 462 can move back and forth along the first direction D1 under the drive of the first conveying drive motor 466. The first conveying robot 462 has a suction cup assembly 4620 with a suction port facing downward and a vacuum device (not shown) connected to the suction cup assembly 4620. The vacuum device (not shown) is used to draw a vacuum so that the suction cup assembly 4620 generates an adsorption force on the soft-pack battery 10 to achieve the picking and placing of the soft-pack battery 10.

[0089] Furthermore, the first conveying robot 462 is also provided with a lifting cylinder (not shown) that can drive the suction cup assembly 4620 to move up and down in the vertical direction, so as to realize the back and forth movement of the first conveying robot 462 between different functional mechanisms without causing motion interference.

[0090] Since side edges 10d are left on both sides of the battery body 10a after the airbag bag 10b is cut off, the electrolyte in the soft-pack battery 10 will leak out from the side edges 10d, so the side edges 10d need to be folded and hot-stamped. In order to fold and hot-stamp the soft-pack battery 10 after the edge cutting, the soft-pack battery secondary packaging production line further includes a folding and hot-stamping device 5 arranged downstream of the edge cutting device 4.

[0091] like Figure 29-35 As shown, the first folding mechanism 51 includes a first folding fixture 510 and a first folding assembly 512 arranged on opposite sides of the first folding fixture 510 along the second direction D2. The first folding fixture 510 is rectangular as a whole, and has folding surfaces 510a extending outward from its two side walls along the second direction D2, and an outer side wall of the first folding fixture 510 located below the folding surface 510a is provided with a folding groove 510b extending along the first direction D1, wherein the angle between the side wall of the folding groove 510b close to the folding surface 510a and the folding surface 510a is an acute angle. Each set of first hemming components 512 includes a first hemming bracket 5120, a first hemming driving cylinder 5121 disposed on the first hemming bracket 5120, a hemming mounting plate 5127 fixedly connected to the movable rod of the first hemming driving cylinder 5121, a hemming pressing plate 5123 elastically connected to the hemming mounting plate 5127, a second hemming driving cylinder 5122 disposed on the hemming mounting plate 5127, and a first hemming pressing plate 5124 fixedly connected to the movable rod of the second hemming driving cylinder 5122. The movable rod of the first hemming driving cylinder 5121 is vertically downward to drive the hemming pressing plate 5123 to move up and down in the vertical direction. The folding clamping plate 5123 is rectangular in shape as a whole and is located directly above the folding surface 510a. The top of the folding clamping plate 5123 is elastically connected to the folding mounting plate 5127 through a spring (not shown). When the first folding drive cylinder 5121 drives the folding clamping plate 5123 to move downward, the folding clamping plate 5123 can press the side edge 10d of the soft-pack battery on the folding surface 510a. The first folding clamping plate 5124 is "L"-shaped as a whole, and the end thereof in contact with the side edge 10d of the soft-pack battery is a push end, which can be engaged with the folding groove 510b of the first folding fixture 510. The movable rod of the second folding drive cylinder 5122 is parallel to the second direction D2 to drive the first folding clamping plate 5124 to move back and forth along the second direction D2.

[0092] When folding, Figure 2-3The soft-pack battery 10 shown is placed horizontally on the first folding fixture 510, and the side edge 10d of the soft-pack battery is placed on the folding surface 510a of the first folding fixture 510. The first folding drive cylinder 5121 drives the folding clamping plate 5123 to move downward in the vertical direction. When the folding clamping plate 5123 moves to abut against the side edge 10d of the soft-pack battery on the folding surface 510a, the side edge 10d can be pressed. Subsequently, the pushing end of the first folding clamping plate 5124 that continues to move downward pushes the part of the side edge 10d of the soft-pack battery protruding from the folding surface 510a downward, so that it bends downward 90° and is parallel to the outer wall of the first folding fixture 510. Next, the second folding driving cylinder 5122 drives the first folding pressing plate 5124 to move toward the first folding fixture 510 along the first direction D1 to push the portion of the side edge 10d of the soft-pack battery parallel to the outer wall of the first folding fixture 510, so that it fits the inner wall of the folding groove 510b to form a folded structure. In this way, the side edge 10d of the soft-pack battery has a Fig.36 Since the angle between the side wall of the hem groove 510b close to the hem carrying surface 510a and the hem carrying surface 510a is an acute angle, the first hem angle α1 formed is also an acute angle (ie 0<α1<90°).

[0093] The more bending structures there are on the side 10 of the soft-pack battery, the greater the obstruction to the flow of the electrolyte and the better the sealing effect. Therefore, when the side 10d of the soft-pack battery is longer, the part of the side 10d protruding from the folding surface 510a is bent 90° and completely covers the folding groove 510b. In order to increase the number of bending structures formed after the soft-pack battery 10 is folded, the cross-section of the folding groove 510b perpendicular to the first direction D1 is triangular, and the vertex angle of the triangle is <α1+90°. In this way, after folding, the following can be formed: Fig.37 The bending structure shown in FIG. 1 has a first bending angle α1 and a second bending angle α2, wherein 0<α1<90°, 0<α2<α1+90°. In addition, the cross section of the hem groove 510b perpendicular to the first direction D1 may also be as follows: Fig.38 The trapezoidal shape shown in the figure has a minimum angle between the side wall of the trapezoidal hem groove 510b away from the hem carrying surface 510a and a plane parallel to the hem carrying surface 510a, which is an acute angle (ie 0<α1<90°).

[0094] Furthermore, in order to prevent the hemming mounting plate 5127 from deflecting during the downward movement, the first hemming mechanism 51 further includes a first hemming guide rail 5125 provided on the first hemming bracket 5120 and a first hemming slider 5126 used in conjunction with the first hemming guide rail 5125. Specifically, the first hemming guide rail 5125 extends in the vertical direction, the first hemming slider 5126 is slidably connected to the first hemming guide rail 5125, and the hemming clamping plate 5123 is fixedly connected to the first hemming guide rail 5125. In this way, the first hemming guide rail 5125 and the first hemming slider 5126 cooperate to guide the movement of the hemming clamping plate 5123, thereby ensuring that the hemming clamping plate 5123 will not deflect during the movement.

[0095] like Fig.38 As shown, the first edge ironing mechanism 52 includes a first edge ironing fixture 520, and first edge ironing components 522 arranged on opposite sides of the first edge ironing fixture 520 along the second direction D2. The first edge ironing fixture 520 is rectangular as a whole, and is provided with positioning blocks 520a for positioning the battery body 10a on both sides along the first direction D1. Each group of first edge ironing components 522 includes a first edge ironing bracket 5220, a first edge ironing driving cylinder 5221 arranged on the first edge ironing bracket 5220, a first edge ironing heating block 5222 fixedly connected to the movable rod of the first edge ironing driving cylinder 5221, and a second edge ironing heating block 5223 arranged directly below the first edge ironing heating block 5222 and located on the outside of the first edge ironing fixture 520. The first edge ironing heating block 5222 and the second edge ironing heating block 5223 are both connected to a heating source (such as a heating tube, a heating wire or a heating plate) to generate heat by heating.

[0096] When performing edge ironing, the soft-pack battery 10 is placed on the first edge ironing fixture 520, and the bent side 10d is placed on the top surface of the second edge ironing heating block 5223. The first edge ironing driving cylinder 5221 drives the first edge ironing heating block 5222 to move toward the second edge ironing heating block 5223 in the vertical direction, and the bent side 10d is flattened into a "one" shape by the first edge ironing heating block 5222 and the second edge ironing heating block 5223. At the same time, the first edge ironing heating block 5222 and the second edge ironing heating block 5223 generate heat to seal the side 10d of the soft-pack battery.

[0097] The first folding mechanism 51 is used to increase the bending of the side edge 10d of the soft-pack battery to more than 90°, so that the side edge 10d of the soft-pack battery has a first folding angle that is an acute angle, and then the side edge 10d of the soft-pack battery is folded by the first ironing mechanism 52 (equivalent to folding the side edge 10d 180°). In this way, the flow path of the electrolyte in the soft-pack battery 10 is cut off, the sealing effect is improved, and leakage is reduced.

[0098] In order to convey the soft-pack battery 10 to the first ironing mechanism 52 located downstream of the first folding mechanism 51 along the first direction D1 and ensure that the bending structure of the side 10d of the soft-pack battery is not damaged, the above-mentioned folding and ironing device 5 also includes a first conveying mechanism 46, which is used to move the soft-pack battery 10 located on the first folding fixture 510 to the first ironing fixture 520; after completion, the first conveying mechanism 46 transfers the soft-pack battery 10 to the next functional mechanism.

[0099] Specifically, Fig.39 As shown, the first conveying mechanism 46 includes a second conveying robot 464 slidably connected to the first conveying bracket 460. The second conveying robot 464 can move back and forth along the first direction D1 under the drive of the second conveying drive motor 466. The second conveying robot 464 has a horizontally arranged adsorption plate 4640, and the adsorption plate 4640 is provided with a first conveying limit block 4640a on the upstream side of the first direction D1, and a suction through hole (not shown) connected to the vacuum device is provided at the bottom thereof, and the vacuum device (not shown) is used to draw a vacuum to generate an adsorption force on the soft-pack battery 10 through the adsorption through hole, so as to realize the picking and placing of the soft-pack battery 10.

[0100] When the first conveying mechanism 46 is working, the adsorption plate 4640 of the second conveying robot 464 adsorbs the battery body 10a through the adsorption through hole (not shown), and at the same time, the first conveying limit block 4640a abuts against one side of the battery body 10a along the first direction D1, and then drives the soft-pack battery 10 to move in the horizontal direction until the soft-pack battery 10 is completely separated from the first folding clamp 510.

[0101] In order to cooperate with the second conveying robot 464 to directly move the soft-pack battery 10 horizontally to the first edge-folding fixture 520 and ensure that its bent side edge 10d can be placed on the top surface of the second edge-folding heating block 5223, the first edge-folding mechanism 51 also includes a first edge-folding lifting component 514. Fig.33 As shown, the first folding lifting assembly 514 includes a first folding lifting cylinder 5140 arranged below the first folding clamp 510. The movable rod of the first folding lifting cylinder 5140 is vertically upward and fixedly connected to the bottom of the first folding clamp 510 to drive the first folding clamp 510 to move in the vertical direction.

[0102] After the first folding is completed, the first folding lifting cylinder 5140 drives the first folding fixture 510 to rise, so that the height position of the first folding fixture 510 is higher than the height position of the second ironing heating block 5223. In this way, when the second conveying robot 464 translates the soft-pack battery 10 to the first ironing mechanism 52, the bent side 10d of the soft-pack battery 10 can be placed on the top surface of the second ironing heating block 5223, so as to facilitate ironing the side 10d. Preferably, the first folding lifting assembly 514 also includes a first folding guide shaft 5141 and a first folding guide cylinder 5142 used in conjunction with the first folding guide shaft 5141. The first folding guide shaft 5141 is parallel to the movable rod of the first folding lifting cylinder 5140, and the first folding guide shaft 5141 is fixedly connected to the first folding fixture 510 and is sleeved on the outside of the first folding guide shaft 5141. The first folding guide shaft 5141 and the first folding guide cylinder 5142 cooperate to guide the first folding clamp 510, ensuring that the first folding clamp 510 will not deviate during the lifting and lowering process.

[0103] During folding and ironing, the corners of the side edges are prone to stress concentration and are prone to damage. Once damaged, the electrolyte inside the battery is prone to leak out from the corners. In order to reinforce the corners of the side edge 10d, as an optional method, the folding and ironing device 5 further includes a corner sealing mechanism 50 disposed upstream of the first folding mechanism 51. Since corner sealing is a prior art, the specific structure and working principle of the corner sealing mechanism will not be described in detail here.

[0104] Specifically, Figure 40-42 As shown, the second folding mechanism 53 includes a second folding fixture 530, and two groups of second folding components 532 arranged on opposite sides of the second folding fixture 530 along the second direction D2. The second folding fixture 530 is rectangular as a whole, and is provided with positioning blocks 530a for limiting the position of the battery body 10a on opposite sides along the first direction D1. Each group of second folding components 532 includes a second folding bracket 5320, a third folding drive cylinder 5321 arranged on the second folding bracket 5320, and a second folding pressure plate 5322 fixedly connected to the third folding drive cylinder 5321. The side of the second folding pressure plate 5322 close to the second folding fixture 530 forms a push surface 5322a inclined from the inside to the outside.

[0105] When in use, the soft-pack battery 10 is placed on the second folding fixture 530 so that the two sides of the soft-pack battery 10 face the two second folding plates 5322. When the second folding is performed, the third folding drive cylinders 5321 on both sides drive the second folding plates 5322 to move toward the second folding fixture 530, and the push surface 5322a of the second folding plate 5322 abuts against the side 10d of the soft-pack battery, and drives the side to bend downward until it fits with the push surface 5322a of the second folding plate 5322, so that there is an acute angle between the side 10d of the soft-pack battery and the battery body 10a.

[0106] Furthermore, the second folding assembly 532 also includes a folding heating block 5323 disposed on opposite sides of the second folding fixture 30 along the second direction D2 and directly below the second folding plate 5322. The folding heating block 5323 has a protruding portion 5323a extending upward, and the side of the protruding portion 5323a facing the second folding plate 5322 is an inclined surface 5323a matching the pushing surface 5322a. The pushing surface 5322a of the second folding plate 5322 pushes the side 10d of the soft-pack battery to bend downward to the protruding portion 5323a of the folding heating block 5323, and the folding heating block 5323 heats and seals the bend formed by the first folding by heating.

[0107] like Fig.43 As shown, the second edge ironing mechanism 54 includes a second edge ironing fixture 540, and two groups of second edge ironing components 542 arranged on opposite sides of the second edge ironing fixture 540 along the second direction D2. The second edge ironing fixture 540 is also rectangular as a whole, and is provided with positioning blocks 540a for limiting the position of the battery body 10a on opposite sides along the first direction D1. Each group of second edge ironing components 542 includes a second edge ironing bracket 5420, a second edge ironing driving cylinder 5421 arranged on the second edge ironing bracket 5420, and a third edge ironing heating block 5422 fixedly connected to the second edge ironing driving cylinder 5421. The movable rod of the second edge ironing driving cylinder 5421 is parallel to the second direction D2, and can drive the third edge ironing heating block 5422 to move back and forth along the second direction D2. The third edge ironing heating block 5422 is connected to a heating source (such as a heating wire, a heating tube or a heating plate), and its side facing the second edge ironing fixture 540 is a heating surface.

[0108] When in use, the soft-pack battery 10 is placed on the second edge-heating fixture 540, so that the two side edges 10d of the soft-pack battery 10 face the heating surfaces of the two third edge-heating heating blocks 5422. During edge-heating, the second edge-heating driving cylinder 5421 drives the third edge-heating heating block 5422 to move toward the second edge-heating fixture 540, and after the heating surface of the third edge-heating heating block 5422 abuts against the bent side edge of the soft-pack battery 10, it continues to push it to the side parallel to the battery body 10a.

[0109] In this way, by performing the second folding and second ironing on the soft-pack battery 10 , the bending part of the side is increased to further improve the sealing effect, and at the same time, the protruding side 10d of the soft-pack battery 10 is eliminated, so that the outer surface of the soft-pack battery 10 is smoother.

[0110] Furthermore, in order to move the soft-pack battery located at the second folding mechanism 53 to the second ironing mechanism 54 and ensure that the bending structure of the side edge 10d of the soft-pack battery is not damaged, the folding and ironing device 5 further includes a second conveying mechanism 56, which is used to move the soft-pack battery 10 located on the second folding fixture 530 to the second ironing fixture 540; after completion, the second conveying mechanism 56 transfers the soft-pack battery 10 to the next functional device. The structure and working principle of the second conveying mechanism 56 are the same as those of the first conveying mechanism 46, so they are not repeated here.

[0111] Like the first folding mechanism 51, the second conveying mechanism 56 can directly move the soft-pack battery 10 horizontally from the second folding fixture 530 to the second ironing fixture 540. The second folding mechanism 53 also includes a second folding lifting assembly 534. Fig.43 As shown, the second hemming lifting assembly 534 includes a second hemming lifting cylinder 5340 disposed below the second hemming fixture 530, and the movable rod of the second hemming lifting cylinder 5340 is vertically upward and fixedly connected to the bottom of the second hemming fixture 530 to drive the second hemming fixture 530 to move in the vertical direction. Further, in order to prevent the second hemming fixture 530 from shifting during the lifting process, the second hemming lifting assembly 534 also includes a second hemming guide shaft 5341 and a second hemming guide cylinder 5342 used in conjunction with the second hemming guide shaft 5341. The connection relationship and working principle between the second hemming guide shaft 5341 and the second hemming guide cylinder 5342 are the same as the connection relationship and working principle between the first hemming guide shaft 5141 and the first hemming guide cylinder 5142, so they are not repeated here.

[0112] After the second folding is completed, the second folding lifting cylinder 5340 drives the second folding fixture 530 to rise, so that the height of the second folding fixture 530 is higher than the height of the second ironing fixture 540. In this way, when the first conveying robot 462 translates the soft-pack battery 10 to the first ironing mechanism 52, the battery body 10 can be placed on the top surface of the second ironing heating block 5223, and the side 10d is directly facing the third ironing heating block 5422, so as to heat and seal the side 10d. Here, the second conveying mechanism 56 and the first conveying mechanism 46 can be the same functional mechanism, or they can be as follows Figure 4 Two different functional mechanisms are shown.

[0113] In the actual production process, after the second folding and the second ironing, the side edge 10d is often prone to rebound and warp. To avoid this, the folding and ironing device 5 further includes a glue dispensing mechanism 55. The glue dispensing mechanism 55 is arranged between the first ironing mechanism 52 and the second folding mechanism 53, and is used to dispense glue between the side edge 10d of the soft-pack battery and the battery body 10a before the second folding. Since the glue dispensing mechanism is a prior art, its specific structure and working principle will not be described in detail here.

[0114] Since the hemming and folding device 5 includes multiple functional mechanisms, if these functional mechanisms are arranged in a straight line, they will occupy a large space. In order to reduce the space occupied by the production line and make the layout more reasonable, Figure 4 As shown, the corner sealing mechanism 50, the first folding mechanism 51 and the first ironing mechanism 52 in the above-mentioned folding and ironing device 5 are respectively arranged symmetrically with the second ironing mechanism 54, the second folding mechanism 53 and the glue dispensing mechanism 55 with the first direction D1 as the axis, so that the direction in which the soft-pack battery 10 moves from the corner sealing mechanism 50 to the first folding mechanism 51 and then to the first ironing mechanism 52 is opposite to the direction in which it moves from the glue dispensing mechanism 55 to the second folding mechanism 53 and then to the second ironing mechanism 54. In this way, the overall length of the production line can be shortened.

[0115] Further, if Figure 4 As shown, in order to transfer the soft-pack battery 10 from the first edge ironing mechanism 52 to the glue dispensing mechanism 55, the soft-pack battery secondary packaging production line further includes a transfer device 6 disposed between the first edge ironing mechanism 52 and the glue dispensing mechanism 55. The transfer device 6 includes a transfer sliding assembly (not shown), a transfer platform (not shown) slidably disposed on the transfer sliding assembly, and a transfer driving assembly (not shown) for driving the transfer platform to move back and forth along the second direction D2.

[0116] The transfer sliding assembly (not shown) includes two transfer rails parallel to the second direction D2 and transfer sliding blocks that slide in cooperation with the two rails, and the bottom of the transfer platform is fixedly connected to the two transfer sliding blocks. The transfer driving assembly (not shown) is fixedly connected to the transfer platform to drive the transfer platform to move back and forth along the transfer rails. Here, the transfer driving assembly (not shown) can be any structure that drives the transfer platform to move linearly, such as a linear motor, or a transmission wheel included in the lower cavity driving assembly 35 of the aforementioned exhaust device 3, a transmission belt that cooperates with the transmission belt for transmission, and a servo motor, as long as it can achieve driving the transfer platform to move along the second direction D2.

[0117] After the first edge-ironing mechanism 53 completes the first edge-ironing of the soft-pack battery 10, the transfer platform moves to the downstream position of the first edge-ironing fixture 520 along the first direction D1, and the first conveying robot 462 moves the soft-pack battery 10 from the first edge-ironing fixture 520 to the transfer platform. The transfer platform moves toward the dispensing mechanism 55 along the second direction D2 until it is aligned with the dispensing fixture 550 of the dispensing mechanism 55. The second transfer robot moves to the top of the transfer platform and moves the soft-pack battery 10 to the dispensing fixture.

[0118] In order to prevent the soft-pack battery 10 on the transfer platform from moving during the movement of the transfer platform, the transfer platform is also provided with an adsorption hole (not shown in the figure), which is connected to a vacuum pumping device to generate negative pressure through vacuum pumping to adsorb the soft-pack battery 10 placed on the transfer platform.

[0119] Furthermore, the soft-pack battery production line further includes a weighing and scanning device 7 and a material unloading device 8 which are sequentially arranged downstream of the second edge ironing mechanism 54. The weighing and scanning device 7 weighs and scans the soft-pack battery 10, and the material unloading device 8 sorts and unqualified products according to the weighing result.

[0120] Compared with the prior art, the soft-pack battery secondary packaging production line of the present invention arranges multiple exhaust units in the exhaust device symmetrically in pairs, and realizes rapid loading through the cooperation of the movable lower cavity in each exhaust unit and the loading device, thereby shortening the moving distance of the loading device, realizing rapid loading, and improving production efficiency. Moreover, through reasonable layout, the overall space occupied by the secondary packaging production line can be reduced; further, by sequentially arranging a trimming device, a folding and ironing device, a transfer device, a weighing and scanning device, and a unloading device downstream of the exhaust device, the automated production of soft-pack batteries can be realized.

[0121] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and the present invention is also intended to include these modifications and modifications.

Claims

1. A soft pack battery secondary packaging production line, characterized by: The invention comprises a loading platform (1) for placing soft-pack batteries to be exhausted, an exhaust device (3) arranged downstream of the loading platform (1) in a first direction, and a loading device (2) capable of moving the soft-pack batteries (10) placed on the loading platform (1) to the exhaust device (3); The exhaust device (3) comprises 2n exhaust units (30) arranged symmetrically with the first direction as an axis, wherein n≥1; The exhaust unit (30) comprises a fixed upper cavity mechanism (31), and a lower cavity mechanism (32) arranged directly below the upper cavity mechanism (31); The lower cavity mechanism (32) can be moved from a first position located directly below the upper cavity mechanism (31) to a second position along a second direction, wherein the second direction is perpendicular to the first direction; When the lower cavity mechanism (32) moves from the first position to the second position, the loading device (2) moves the to-be-exhausted soft-pack battery (10) located on the loading platform (1) to the lower cavity mechanism (32), and then the lower cavity mechanism (32) moves from the second position to the first position; And / or, when the lower cavity mechanism (32) moves from the first position to the second position, the loading device (2) removes the exhausted soft-pack battery (10) located in the lower cavity mechanism (32), and then the lower cavity mechanism (32) moves from the second position to the first position.

2. The soft pack battery secondary packaging production line according to claim 1, characterized in that: It comprises four exhaust units (30), and the four exhaust units (30) are symmetrically arranged in pairs along the first direction.

3. The soft pack battery secondary packaging production line according to claim 2, characterized in that: The lower cavity mechanisms (32) of the two symmetrically arranged exhaust units (30) move alternately, so that when one of the lower cavity mechanisms (32) moves from the first position to the second position, the other lower cavity mechanism (32) moves from the second position to the first position.

4. The soft pack battery secondary packaging production line according to claim 1, characterized in that: The exhaust device (3) further comprises a lower cavity driving assembly corresponding one to one with the exhaust unit (30), the lower cavity driving assembly being located on one side of the corresponding exhaust unit (30) and being used for driving the lower cavity mechanism (32) to move back and forth between the first position and the second position; The lower cavity driving assembly includes two transmission wheels distributed along the second direction, a transmission belt sleeved on the outer peripheral sides of the two transmission wheels and cooperated with the transmission wheels for transmission, a clamping block that clamps the transmission belt and is fixedly connected to the lower cavity base, and a base driving motor connected to one of the transmission wheels and drives the transmission wheel to rotate.

5. The soft pack battery secondary packaging production line according to claim 1, characterized in that: The upper cavity mechanism (31) comprises an upper cavity cover (310) that can move up and down in a vertical direction, the upper cavity cover (310) having a accommodating cavity (310a) with an opening facing downward, and a bayonet (3100) is arranged in the accommodating cavity (310a); The upper cavity cover (310) moves downward to cover the top of the lower cavity mechanism (32), so that the accommodating cavity (310a) forms a sealed cavity, and the bayonet pierces the airbag bag of the soft-pack battery; The sealed chamber is connected to a vacuum pumping mechanism.

6. The soft pack battery secondary packaging production line according to claim 1, characterized in that: The loading device (2) comprises a loading bracket (33) extending along the first direction, and a transfer robot slidably arranged on the loading bracket; The transfer robot comprises a transfer adsorption component. After the loading adsorption component adsorbs the soft-pack battery, it moves along the first direction to just above the lower cavity mechanism (32) located at the second position, and places the soft-pack battery (10) in the lower cavity mechanism (32).

7. The soft pack battery secondary packaging production line according to claim 5, characterized in that: The loading device (2) comprises two transfer manipulators, namely a first transfer manipulator and a second transfer manipulator; When the lower cavity mechanism moves from the first position to the second position, the first transfer robot moves the soft-pack battery (10) to be exhausted located on the loading platform (1) to the lower cavity mechanism; When the lower cavity mechanism moves from the first position to the second position, the second transfer robot takes away the exhausted soft-pack battery (10) located in the lower cavity mechanism (32).

8. The soft pack battery secondary packaging production line according to claim 1, characterized in that: It also includes a trimming device (4) arranged downstream of the exhaust device (3) along the first direction, the trimming device (4) including a pre-cutting mechanism (40) and two fine-cutting mechanisms (41), and a first conveying mechanism (46); The pre-cutting mechanism (40) is used to cut off the airbag bag (10b) of the soft-pack battery (10); The two fine-cutting mechanisms (41) are respectively a first fine-cutting mechanism (42) and a second fine-cutting mechanism (44); the first fine-cutting mechanism (42) and the second fine-cutting mechanism (44) are mirror-symmetrical structures; the first fine-cutting mechanism (42) and the second fine-cutting mechanism (44) are sequentially arranged downstream of the pre-cutting mechanism (40) along the first direction to respectively cut the two side edges (10d) of the soft-pack battery (10) along the second direction; The first conveying mechanism (46) is used to sequentially move the soft-pack battery (10) from the pre-cutting mechanism (40) to the first fine-cutting mechanism (42), and then to the second fine-cutting mechanism (44).

9. The soft pack battery secondary packaging production line according to claim 8, characterized in that: The invention comprises a folding and ironing device (5) arranged downstream of the trimming device (4), wherein the folding and ironing device (5) comprises a first folding mechanism (51) and a first ironing mechanism (52) arranged in sequence downstream of the trimming device (4) along the first direction, and a second folding mechanism (53) and a second ironing mechanism (54) arranged in sequence downstream of the first ironing mechanism (52) along the first direction; After the first folding mechanism (51) and the first ironing mechanism (52) have completed the first folding and the first ironing of the two side edges (10d), the soft-pack battery (10) is moved to the second folding mechanism (53) and the second ironing mechanism (54) in sequence to perform the second folding and the second ironing on the two side edges in sequence.

10. The soft pack battery secondary packaging production line according to claim 9, characterized in that: The direction in which the soft-pack battery (10) moves from the first folding mechanism (51) to the first ironing mechanism (52) is opposite to the direction in which it moves from the second folding mechanism (53) to the second ironing mechanism (54); The folding and ironing device (5) further comprises a second conveying mechanism, which is arranged between the first ironing mechanism and the second folding mechanism and is used to move the soft-pack battery from the first ironing mechanism to the second folding mechanism.

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