CN112072152A - Vertical air-extracting packaging machine for soft package battery and vertical air-extracting sealing method for soft package battery - Google Patents
Vertical air-extracting packaging machine for soft package battery and vertical air-extracting sealing method for soft package battery Download PDFInfo
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- CN112072152A CN112072152A CN201910497802.0A CN201910497802A CN112072152A CN 112072152 A CN112072152 A CN 112072152A CN 201910497802 A CN201910497802 A CN 201910497802A CN 112072152 A CN112072152 A CN 112072152A
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- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/005—Devices for making primary cells
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Abstract
A vertical air-extracting packaging machine for a soft package battery and a vertical air-extracting sealing method for the soft package battery aim at solving the technical problem that in the prior art, the liquid retention amount of a battery core is low due to more electrolyte extracted by the air-extracting sealing mode of the soft package battery. The invention comprises an upper cover plate and a lower cover plate which can be movably butted to form a sealed cavity, wherein a fixing piece is connected to the lower cover plate and used for vertically clamping a soft package battery, clamping pieces for fixing the soft package battery are arranged on two sides of the fixing piece, a packaging piece for secondarily packaging the soft package battery is arranged above the fixing piece, and a puncturing piece capable of puncturing an air bag to further realize gas-liquid separation is arranged near the air bag connected with the upper end of the soft package battery. According to the invention, the vertical air-extracting sealing method is adopted to carry out secondary packaging on the soft package battery, so that the liquid retention capacity of the battery cell can be improved, and the relevant performances such as the capacity and the circulation of the battery cell can be further improved; in addition, the same device is used for carrying out air extraction operation and secondary packaging operation on the soft package battery, the process is compact, the working hours can be greatly shortened, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of automation of battery production and manufacturing machinery, in particular to a vertical type soft-package battery air-extracting packaging machine and a vertical type soft-package battery air-extracting sealing method.
Background
Among three important configurations of the soft package battery, the square laminated type (commonly called as 'soft package') has the advantages of good heat dissipation performance, excellent current density distribution uniformity on the polar plate, light weight and the like compared with the cylindrical winding type and the square winding type, so that the application range is wider. In the production process of the soft package battery, electrolyte needs to be injected into the battery cell air bag, and after the electrolyte is injected, a sealing head is carried out on the opening of the battery cell air bag (pre-sealing process); in the second sealing process, the battery cell air bag is horizontally placed manually for vacuumizing operation, and at the moment, a part of electrolyte in the battery cell air bag is extracted along with the battery cell air bag, so that the quality of the finished battery is directly influenced, and the problem of production yield is caused. Moreover, since the electrolyte remains in the package position of the secondary package, a package failure is liable to occur. The existing commonly used rotating disc type air-extracting sealing machine and automatic air-extracting sealing machine are used for horizontally laying an electric core for air-extracting sealing, and in the air-extracting sealing process, the amount of electrolyte extracted by a battery is very large, so that the liquid retaining amount of the electric core is small; the liquid retention of the battery cell is small, and further poor performances such as poor circulation, low capacity, large internal resistance and the like of the battery cell are caused. In the actual production process, the quantity of the battery cells with smaller liquid retention amount is larger and larger, the rejection rate of the battery cells is increased, the enterprise cost is increased, and the further development of enterprises is seriously restricted.
Chinese patent No. CN 106784971B discloses a pouch cell air-extracting packaging machine, which comprises a base, a vacuum-extracting packaging device, a secondary packaging device, an aluminum-plastic film cutting device, and a cell transfer device connected between the secondary packaging device and the aluminum-plastic film cutting device, wherein the vacuum-extracting packaging device, the secondary packaging device, the aluminum-plastic film cutting device and the cell transfer device are arranged on the base in sequence; the vacuum packaging apparatus includes: the device comprises a horizontal reciprocating transfer part, a vertical reciprocating lifting part, an upper cavity, a lower cavity, a battery puncture part, a vacuum pumping part and a primary packaging part; the horizontal reciprocating transfer part drives the lower cavity to reciprocate along the horizontal direction, the vertical reciprocating lifting part drives the upper cavity to reciprocate along the vertical direction, the vacuum pumping part is installed on the lower cavity, and the battery puncturing part and the primary packaging part are installed on the upper cavity; the battery piercing part includes: the battery puncture device comprises a battery puncture left driving part, a battery puncture knife arranged at the telescopic end of the battery puncture left driving part, a battery puncture right driving part and a battery knife board arranged at the telescopic end of the battery puncture right driving part, wherein the battery puncture left driving part drives the battery puncture knife to move back and forth along the horizontal direction to be close to or far away from the battery knife board, the battery puncture right driving part drives the battery knife board to move back and forth along the horizontal direction to be close to or far away from the battery puncture knife, and the battery knife board is provided with a battery knife slot matched with the battery puncture knife; the primary packaging portion includes: the left heat sealing device comprises a left packaging driving part, a right packaging driving part, a left heat sealing head arranged at the telescopic end of the left packaging driving part and a right heat sealing head arranged at the telescopic end of the right packaging driving part, wherein the left packaging driving part drives the left heat sealing head to reciprocate in the horizontal direction to be close to or far from the right heat sealing head, and the right packaging driving part drives the right heat sealing head to reciprocate in the horizontal direction to be close to or far from the left heat sealing head; the secondary packaging device includes: encapsulation support frame, top encapsulation lift portion, bottom encapsulation lift portion, locate the flexible end of top encapsulation lift portion last heat-seal, locate the flexible end of bottom encapsulation lift portion lower heat-seal, top encapsulation lift portion reaches bottom encapsulation lift portion all install in on the encapsulation support frame, top encapsulation lift portion drive go up the heat-seal and go up the vertical direction lift and be close to or keep away from lower heat-seal, bottom encapsulation lift portion drive down the heat-seal goes up and down to go up along vertical direction and is close to or keep away from go up the heat-seal.
Above-mentioned patent provides a laminate polymer battery encapsulation machine of bleeding carries out the encapsulation of vertical type bleeding to big laminate polymer battery, prevents that the electrolyte in the plastic-aluminum membrane from appearing and leading to revealing the accident. However, the vacuumizing operation and the secondary packaging operation in the above patent need to be performed in two different devices, in order to prevent the vacuumized gas from entering the soft package battery again, the bottom of the air bag needs to be pre-sealed after vacuumizing, secondary edge sealing is performed on the soft package battery in the secondary packaging device, on one hand, the process and the device structure are complex, the processing time in actual processing is long, the production cost is high, on the other hand, the performance of the aluminum-plastic film material at the edge sealing position of the soft package battery can be influenced by the pre-sealing after vacuumizing, and then the packaging precision of the secondary packaging operation can possibly be reduced, so that the electrolyte leakage rate of the soft package battery is increased.
Chinese patent application No. CN 201610463805.9 discloses a vertical packaging machine for soft-package batteries, which comprises a loading and unloading mechanism for vertically clamping and conveying the soft-package batteries subjected to the pre-sealing process, a packaging mechanism arranged above the loading and unloading mechanism for secondarily packaging the soft-package batteries, a gas-liquid separation system communicated with the packaging mechanism, and an electric control device for controlling the mechanism and the system to realize the packaging process; the loading and unloading mechanism comprises a bottom frame, a feeding and discharging workbench arranged on the bottom frame and a clamping translation device arranged on the feeding and discharging workbench; centre gripping translation device is including establishing the translation guide rail subassembly on the business turn over material workstation, establish the slip table on translation guide rail subassembly, establish lower cavity, splint subassembly, centre gripping cylinder group, feeding cylinder, slip table guide pillar subassembly and lead screw motor on the slip table, feeding cylinder establishes drive connection slip table on the business turn over material workstation, the cavity is established at the top face of slip table down, and lower cavity is equipped with orientation lower accent up and supplies the space of splint subassembly installation, the splint subassembly is established in the cavity down, including two parallel symmetries corresponding in the ground be the splint that vertical angle set up, the cylinder group symmetry of centre gripping is established in the both sides of cavity down, drive connection splint, the vertical bottom face of establishing at the slip table of slip table guide pillar subassembly, lead screw motor establishes the cavity under the lead screw drive connection in the one end of slip table guide pillar subassembly.
The above patent is more reasonable in control principle, structural configuration and operation mode, has high automation degree, solves the problems of electrolyte waste and incomplete air exhaust caused by the fact that an air bag of the battery cell cannot be effectively punctured in the prior art, and is beneficial to ensuring the quality of the battery cell; during operation, the electrolyte mixed in the extracted gas can be separated and recovered, and the corrosion condition caused by the electrolyte entering the vacuum generating device is avoided. However, in the invention, the handling mechanism is directly introduced after the pre-packaging process to vertically clamp and convey the soft package battery subjected to the pre-packaging process, so that the pre-packaging process and the secondary packaging process are continuously performed, the standing, formation and clamp shaping processes of the soft package battery are omitted, the stable SEI film cannot be formed on the surface of the electrode, the electrolyte cannot fully react with the electrode, the maximum gas quantity discharged by puncturing gas discharged from the gas bag in the exhaust process in the secondary packaging process is not formed on the surface of the electrode, when the finished soft package battery is used for the first time in hands of a user, the electrolyte continuously reacts with the electrode, the bag expansion quantity of the soft package battery is greatly increased due to the generated gas, and the product yield of the soft package battery is reduced.
Disclosure of Invention
The invention provides a vertical type soft package battery air-extracting packaging machine and a vertical type soft package battery air-extracting sealing method, aiming at overcoming the technical problem that the liquid retention amount of a battery cell is low due to the fact that a large amount of electrolyte is extracted in the air-extracting sealing mode of a soft package battery in the prior art, and the liquid retention amount of the battery cell can be improved by the vertical type soft package battery air-extracting packaging machine and the vertical type soft package battery air-extracting sealing method, so that the capacity, the circulation and other related performances of the battery cell can be improved.
In order to achieve the above object, the present invention adopts the following technical solutions.
The utility model provides a vertical laminate polymer battery packaging machine that bleeds, its characterized in that, including upper cover plate and the lower apron that mobile butt joint formed the sealed chamber, the mounting is connected and is used for erectting clamping laminate polymer battery on the apron down, the both sides of mounting are equipped with the clamping piece that carries out the fixing to laminate polymer battery, the top of mounting is equipped with the packaging piece that carries out secondary packaging to laminate polymer battery, near the air pocket that is connected with the laminate polymer battery upper end is equipped with and punctures the air pocket and then realize gas-liquid separation's puncture piece.
In the formation and standing process of the primary liquid injection packaged soft package battery, an electrolyte and an electrode of the soft package battery react to form an SEI film, a large amount of gas is generated in the process, after the electrolyte and the electrode fully react to form a stable SEI film, the SEI is attached to the surface of an electric electrode to physically isolate the electrolyte and the electrode, and the gas is not generated any more; the secondary packaging of the soft package battery is carried out after the static formation, and the purpose is to discharge gas generated in the static formation, so that the bag expansion rate of the finished soft package battery is reduced. In the traditional processing process, the secondary packaging of the soft package battery usually adopts a horizontal packaging method, and based on the fluidity of the electrolyte, part of the electrolyte is often pumped out in the air pumping process, so that the liquid retention capacity of the soft package battery is reduced. The invention provides a vertical air-extracting packaging machine for a soft package battery, wherein an upper cover plate and a lower cover plate can form a sealed cavity after being butted, air extraction operation is carried out in the sealed cavity, electrolyte is difficult to extract under the action of self weight due to the vertical placement of the soft package battery, the extracted electrolyte is reduced in the air extraction process, the liquid retention capacity of the soft package battery is improved, and further the relevant performances of the capacity, the circulation and the like of a battery cell are improved. The mounting on the apron presss from both sides tight location to laminate polymer battery down, and the clamping piece of mounting both sides stabilizes laminate polymer battery, prevents effectively that it from taking place to heel, and the packaging part of mounting top can carry out secondary package to laminate polymer battery after the operation of bleeding is accomplished, punctures the air pocket that the piece can be connected with laminate polymer battery upper end and punctures, with the cavity through connection of air pocket and sealed chamber. According to the invention, the air bag, the soft-package battery, the packaging part, the puncturing part, the fixing part and the clamping part are all positioned in the sealed cavity formed by butting the upper cover plate and the lower cover plate, when the air extraction operation is carried out on the soft-package battery, the air bag is firstly punctured, then the air extraction operation is carried out on the sealed cavity, the broken opening of the air bag does not need to be correspondingly connected with the vacuumizing device in the process, and the air extraction operation is very simple; in addition, the packaging part positioned in the sealing cavity can perform secondary packaging on the soft package battery immediately after the air extraction operation is finished, so that on one hand, the residual gas amount in the soft package battery can be maintained at a lower level, on the other hand, the air extraction operation and the packaging operation have good connectivity, and the processing efficiency is higher.
Preferably, the cross section of the lower cover plate is U-shaped, the cross section of the upper cover plate is inverted U-shaped, the shape and the size of the lower port of the upper cover plate are consistent with those of the upper port of the lower cover plate, and the upper cover plate can slide up and down along the height direction of the upper cover plate.
The cross section of the lower cover plate is U-shaped, the cross section of the upper cover plate is inverted U-shaped, the shape and the size of the lower port of the upper cover plate are consistent with those of the upper port of the lower cover plate, a sealing cavity for processing can be formed after the upper cover plate is attached to the lower cover plate, a sealing ring can be additionally arranged at the butt joint end of the upper cover plate and the lower cover plate for ensuring good sealing performance, the sealing performance of the sealing cavity is positioned through the compression deformation of the sealing ring, and therefore the efficiency of air exhaust operation is improved.
As preferred, along laminate polymer battery's length direction, the mounting clamping is at the middle part of laminate polymer battery lower extreme, and the mounting includes vertical section and slope section, and the one end of vertical section is connected with the interior bottom surface of apron down, and the one end of slope section is connected to the other end of vertical section, and laminate polymer battery's side is kept away from to the other end of slope section, and the side plane of vertical section can laminate mutually with laminate polymer battery's side plane.
Vertical section is connected to the one end of slope section, and laminate polymer battery's side is kept away from to the other end of slope section, and at polymer battery's clamping process, the slope section leads polymer battery, and the side plane of vertical section can laminate mutually with polymer battery's side plane, carries out the centre gripping to polymer battery.
Preferably, the fixing part comprises a first fixing part and a second fixing part, and the gap distance between the vertical section of the first fixing part and the vertical section of the second fixing part is consistent with the thickness of the soft package battery.
The clearance distance between the vertical section of first mounting and the vertical section of second mounting is unanimous with laminate polymer battery's thickness, and at laminate polymer battery's centre gripping in-process, laminate polymer battery is injectd in the clearance between the vertical section of first mounting and the vertical section of second mounting to effectively prevent laminate polymer battery from taking place to remove along its thickness direction.
Preferably, the clamping piece and the interior bottom surface swing joint of apron down, the clamping piece include first clamp plate and second clamp plate, and first clamp plate and second clamp plate are established respectively in the both sides of mounting along laminate polymer battery's thickness direction, and first clamp plate and second clamp plate can be followed laminate polymer battery's thickness direction and slided and press close to laminate polymer battery's side.
When needs bleed to laminate polymer battery and seal the operation, first clamp plate and second clamp plate slide along laminate polymer battery's thickness direction and paste the side of tight laminate polymer battery, can carry on spacingly to laminate polymer battery on the one hand, prevent that laminate polymer battery from taking place to remove along its length direction, and on the other hand can support laminate polymer battery's side plane, extrudees laminate polymer battery's side plane to in with gaseous row's of going into the gas bag, effectively prevent that the gaseous emergence in the gas bag from flowing backward.
Preferably, the packaging part is movably connected with the inner side wall of the lower cover plate, the packaging part comprises a first packaging part and a second packaging part, the first packaging part and the second packaging part are respectively arranged on two sides of the fixing part along the thickness direction of the soft package battery, the first packaging part and the second packaging part can slide and attach along the thickness direction of the soft package battery, the attachment surfaces of the first packaging part and the second packaging part are overlapped with the bisection surface of the thickness direction of the soft package battery, and the two ends of the first packaging part and the two ends of the second packaging part are respectively protruded out of the two ends of the soft package battery along the length direction of the soft package battery.
The two ends of the first packaging part and the second packaging part are respectively protruded out of the two ends of the soft package battery along the length direction of the soft package battery, and the packaging parts can be completely attached to the edge sealing of the soft package battery during packaging operation, so that the edge sealing quality is ensured, and the phenomenon of missing sealing or incomplete packaging is prevented; the thickness direction that first packaging part and second packaging part can follow laminate in a sliding way of laminate polymer battery's thickness direction, and the binding face of first packaging part and second packaging part coincides with laminate polymer battery's bisection face of thickness direction, can guarantee at the encapsulation in-process, and the banding of laminate polymer battery both sides all fully laminates with the packaging part, and the highly uniform of both sides banding effectively reduces the probability that dislocation encapsulation appears.
Preferably, the puncturing piece comprises a connecting section and a puncturing section, the connecting section is movably connected with the inner bottom surface of the upper cover plate and can slide up and down along the height direction of the upper cover plate, the other end of the connecting section is connected with one end of the puncturing section, the puncturing section is arranged below the connecting section, and the puncturing section is obliquely close to the air bag.
Because the lower end of the air bag is connected with the soft package battery, and the gas in the air bag is discharged from the soft package battery, the lower part of the air bag has more gas and is full in shape, and the upper part of the air bag has less gas and is shrunken in shape; the puncturing piece comprises a connecting section and a puncturing section, the connecting section is movably connected with the inner bottom surface of the upper cover plate and can slide up and down along the height direction of the upper cover plate, the other end of the connecting section is connected with one end of the puncturing section, the puncturing section is arranged below the connecting section, and the puncturing section is obliquely close to the air bag; when the air bag needs to be punctured, the connecting section slides downwards along the height direction of the upper cover plate, the puncturing section gradually clings to the air bag and then punctures the air bag, the puncturing position is usually close to the middle lower part of the air bag, and due to the fact that the air quantity is large and the dead weight of the air is based on, the air in the air bag can be exhausted quickly in the air exhaust process.
Preferably, when only one puncture piece exists, the puncture piece is located in the middle of the air bag along the length direction of the soft package battery, and when the number of the puncture pieces is more than one, the puncture pieces are arranged at equal intervals along the length direction of the soft package battery.
When the size of the soft package battery is small, only one piercing part is needed, and the piercing part is aligned to the middle part of the air bag along the length direction of the soft package battery; when the size of the soft package battery is large, in order to improve the exhaust efficiency, more than one piercing part is arranged at equal intervals along the length direction of the soft package battery
A vertical air-extracting sealing method for a soft package battery comprises the following steps:
(1) the manipulator clamps a soft package battery to be pumped and sealed and places the soft package battery in the lower cover plate, the soft package battery slides downwards along the inclined section of the fixing piece, the side plane of the vertical section of the fixing piece is attached to the side face of the soft package battery, and the first fixing piece and the second fixing piece are matched to clamp the soft package battery tightly;
(2) the first pressing plate and the second pressing plate slide along the thickness direction of the soft package battery to be close to the soft package battery, and the side planes of the first pressing plate and the second pressing plate are attached to the side plane of the soft package battery and fix the soft package battery;
(3) the connecting section of the puncturing piece slides downwards along the height direction of the upper cover plate, the puncturing section of the puncturing piece is contacted with the air bag and punctures the air bag, and the air in the air bag is discharged through the puncturing opening;
(4) the upper cover plate moves downwards and is attached to the lower cover plate to form a sealed cavity, external air extraction equipment is used for extracting air from the sealed cavity, and air in the sealed cavity and air in the air bag are extracted together;
(5) heating the packaging parts, when the gas in the sealed cavity and the gas bag is completely pumped out, enabling the first packaging part and the second packaging part to be attached in a sliding mode along the thickness direction of the soft package battery, enabling the attaching surfaces of the first packaging part and the second packaging part to be overlapped with the bisecting surface of the soft package battery in the thickness direction, and carrying out heat sealing on the sealed edge of the soft package battery;
(6) after finishing sealing, the first pressing plate and the second pressing plate both slide along the thickness direction of the soft package battery to be far away from the soft package battery, and the manipulator clamps the soft package battery to take out the soft package battery from the fixing piece.
In conclusion, the invention has the following beneficial effects: (1) the vertical air-extracting sealing method is adopted to carry out secondary packaging on the soft package battery, so that the liquid retention capacity of the battery cell can be improved, and further, the capacity, the circulation and other related performances of the battery cell are improved (2) the air-extracting operation and the secondary packaging operation are carried out on the soft package battery by using the same device, the process is compact, the working time can be greatly shortened, and the working efficiency is improved; (3) the secondary sealing is carried out on the soft package battery in the sealing cavity, the residual gas amount in the soft package battery is maintained at a lower level, and the bag expansion rate of the finished soft package battery is effectively reduced.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 shows different references to the same view as fig. 1.
Fig. 3 is a side view of the present invention.
In the figure:
1. the flexible package battery comprises an upper cover plate, a lower cover plate, a sealing cavity, a fixing part, a vertical section, a slope section, a first fixing part, a second fixing part, a soft package battery, a clamping part 61, a first pressing plate, a second pressing plate, a sealing part 7, a sealing part 71, a first sealing part 72, a second sealing part 8, an air bag 9, a puncture part 9a, a connecting section 9b and a puncture section.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in fig. 1 to 3, a vertical air-extracting packaging machine for a soft package battery comprises an upper cover plate 1 and a lower cover plate 2 which are movably butted to form a sealed cavity 3, a fixing member 4 is connected to the lower cover plate for vertically clamping the soft package battery, clamping members 6 for fixing the soft package battery 5 are arranged on two sides of the fixing member, a packaging member 7 for secondarily packaging the soft package battery is arranged above the fixing member, and a piercing member 9 capable of piercing an air bag is arranged near the air bag 8 connected to the upper end of the soft package battery to further realize gas-liquid separation; the cross section of the lower cover plate is U-shaped, the cross section of the upper cover plate is inverted U-shaped, the shape and the size of the lower port of the upper cover plate are consistent with those of the upper port of the lower cover plate, and the upper cover plate can slide up and down along the height direction of the upper cover plate; the fixing piece is clamped in the middle of the lower end of the soft package battery along the length direction of the soft package battery and comprises a vertical section 4a and an inclined section 4b, one end of the vertical section is connected with the inner bottom surface of the lower cover plate, the other end of the vertical section is connected with one end of the inclined section, the other end of the inclined section is far away from the side surface of the soft package battery, and the side plane of the vertical section can be attached to the side plane of the soft package battery; the fixing piece comprises a first fixing piece 41 and a second fixing piece 42, and the gap distance between the vertical section of the first fixing piece and the vertical section of the second fixing piece is consistent with the thickness of the soft package battery; the clamping piece is movably connected with the inner bottom surface of the lower cover plate and comprises a first pressing plate 61 and a second pressing plate 62, the first pressing plate and the second pressing plate are respectively arranged on two sides of the fixing piece along the thickness direction of the soft package battery, and the first pressing plate and the second pressing plate can slide along the thickness direction of the soft package battery and are close to the side surface of the soft package battery; the packaging part is movably connected with the inner side wall of the lower cover plate and comprises a first packaging part 71 and a second packaging part 72, the first packaging part and the second packaging part are respectively arranged on two sides of the fixing part along the thickness direction of the soft package battery, the first packaging part and the second packaging part can be attached to each other in a sliding mode along the thickness direction of the soft package battery, the attaching surfaces of the first packaging part and the second packaging part are overlapped with the bisecting surface of the soft package battery in the thickness direction, and the two ends of the first packaging part and the two ends of the second packaging part protrude out of the two ends of the soft package battery along the length direction of the soft package battery; the puncturing piece comprises a connecting section 9a and a puncturing section 9b, the connecting section is movably connected with the inner bottom surface of the upper cover plate and can slide up and down along the height direction of the upper cover plate, the other end of the connecting section is connected with one end of the puncturing section, the puncturing section is arranged below the connecting section, and the puncturing section is obliquely close to the air bag; when only one puncture piece is arranged, the puncture piece is located in the middle of the air bag along the length direction of the soft package battery, and when the number of the puncture pieces is more than one, the puncture pieces are arranged at equal intervals along the length direction of the soft package battery.
A vertical air-extracting sealing method for a soft package battery comprises the following steps:
(1) the manipulator clamps a soft package battery to be pumped and sealed and places the soft package battery in the lower cover plate, the soft package battery slides downwards along the inclined section of the fixing piece, the side plane of the vertical section of the fixing piece is attached to the side face of the soft package battery, and the first fixing piece and the second fixing piece are matched to clamp the soft package battery tightly;
(2) the first pressing plate and the second pressing plate slide along the thickness direction of the soft package battery to be close to the soft package battery, and the side planes of the first pressing plate and the second pressing plate are attached to the side plane of the soft package battery and fix the soft package battery;
(3) the connecting section of the puncturing piece slides downwards along the height direction of the upper cover plate, the puncturing section of the puncturing piece is contacted with the air bag and punctures the air bag, and the air in the air bag is discharged through the puncturing opening;
(4) the upper cover plate moves downwards and is attached to the lower cover plate to form a sealed cavity, external air extraction equipment is used for extracting air from the sealed cavity, and air in the sealed cavity and air in the air bag are extracted together;
(5) heating the packaging parts, when the gas in the sealed cavity and the gas bag is completely pumped out, enabling the first packaging part and the second packaging part to be attached in a sliding mode along the thickness direction of the soft package battery, enabling the attaching surfaces of the first packaging part and the second packaging part to be overlapped with the bisecting surface of the soft package battery in the thickness direction, and carrying out heat sealing on the sealed edge of the soft package battery;
(6) after finishing sealing, the first pressing plate and the second pressing plate both slide along the thickness direction of the soft package battery to be far away from the soft package battery, and the manipulator clamps the soft package battery to take out the soft package battery from the fixing piece.
Respectively applying a traditional horizontal air extraction sealing mode and the vertical air extraction sealing mode to carry out air extraction sealing on the soft package battery, and comparing related experimental data, wherein the liquid injection amount is the weight of the electrolyte actually injected into the soft package battery; the liquid loss amount is the weight of the soft-package battery before air extraction and sealing, and the weight of the soft-package battery after air extraction and sealing; the liquid retention amount is the liquid injection amount-liquid loss amount.
Table 1: lying type air-pumping sealing mode related experimental data (unit g)
| Amount of liquid injected | Weight of soft-package battery before air extraction and sealing | Weight of soft-package battery after air exhaust and sealing | Fluid loss | Liquid retention amount |
| 46 | 239.8 | 238.4 | 1.4 | 44.6 |
| 46 | 240.3 | 239.0 | 1.3 | 44.7 |
| 46 | 240.7 | 238.6 | 2.1 | 43.9 |
| 46 | 239.3 | 238.0 | 1.3 | 44.7 |
| 46 | 240.5 | 238.6 | 1.9 | 44.1 |
| 46 | 239.7 | 238.2 | 1.5 | 44.5 |
The average of the liquid retention amounts of the six sets of experimental data was 44.42g, and the average of the liquid loss amounts was about 1.58 g.
Table 2: vertical air extraction sealing mode related experimental data (unit g)
| Amount of liquid injected | Weight of soft-package battery before air extraction and sealing | Weight of soft-package battery after air exhaust and sealing | Fluid loss | Liquid retention amount |
| 46 | 238.8 | 238.7 | 0.1 | 45.9 |
| 46 | 240.1 | 240.0 | 0.1 | 45.9 |
| 46 | 239.5 | 239.3 | 0.2 | 45.8 |
| 46 | 238.8 | 238.6 | 0.2 | 45.8 |
| 46 | 240.6 | 240.4 | 0.2 | 45.8 |
| 46 | 240.7 | 240.7 | 0.0 | 46.0 |
The average of the liquid retention amounts of the six sets of experimental data was 45.87g, and the average of the liquid loss amounts was about 0.13 g.
The internal resistance of the soft package battery decreases with the increase of the amount of the electrolyte, the capacity increases with the increase of the amount of the electrolyte, and when the amount of the electrolyte is too small, the internal resistance of the battery is large and the capacity is low. Compared with experimental data, the vertical air-extracting sealing machine for the soft package battery and the vertical air-extracting sealing method for the soft package battery can greatly reduce the liquid loss amount, and the liquid retention effect of the vertical air-extracting sealing method is obviously superior to that of the traditional horizontal air-extracting sealing method.
Claims (9)
1. The utility model provides a vertical laminate polymer battery packaging machine that bleeds, its characterized in that, including upper cover plate and the lower apron that mobile butt joint formed the sealed chamber, the mounting is connected and is used for erectting clamping laminate polymer battery on the apron down, the both sides of mounting are equipped with the clamping piece that carries out the fixing to laminate polymer battery, the top of mounting is equipped with the packaging piece that carries out secondary packaging to laminate polymer battery, near the air pocket that is connected with the laminate polymer battery upper end is equipped with and punctures the air pocket and then realize gas-liquid separation's puncture piece.
2. The vertical pouch battery air-extracting packaging machine according to claim 1, wherein the cross section of the lower end cover is U-shaped, the cross section of the upper end cover is inverted U-shaped, the upper end opening of the upper end cover is in accordance with the shape and size of the lower end opening of the lower end cover, and the upper end cover can slide up and down along the height direction of the upper end cover.
3. The vertical laminate polymer battery air-extracting packaging machine is characterized in that along the length direction of the laminate polymer battery, the fixing part is clamped in the middle of the lower end of the laminate polymer battery and comprises a vertical section and an inclined section, one end of the vertical section is connected with the inner bottom surface of the lower end cover, the other end of the vertical section is connected with one end of the inclined section, the other end of the inclined section is far away from the side surface of the laminate polymer battery, and the side plane of the vertical section is attached to the side plane of the laminate polymer battery.
4. The vertical pouch battery air-extracting and packaging machine according to claim 3, wherein the fixing member comprises a first fixing member and a second fixing member, and the gap distance between the vertical section of the first fixing member and the vertical section of the second fixing member is consistent with the thickness of the pouch battery.
5. The vertical laminate polymer battery air-extracting packaging machine of claim 1, characterized in that the clamping member is movably connected with the inner bottom surface of the lower end cover, the clamping member comprises a first pressing plate and a second pressing plate, the first pressing plate and the second pressing plate are respectively arranged at two sides of the fixing member along the thickness direction of the laminate polymer battery, and the first pressing plate and the second pressing plate can slide along the thickness direction of the laminate polymer battery and are close to the side surface of the laminate polymer battery.
6. The vertical type air-extracting packaging machine for the soft package battery is characterized in that the packaging part is movably connected with the inner side wall of the lower end cover and comprises a first packaging part and a second packaging part, the first packaging part and the second packaging part are respectively arranged on two sides of the fixing part along the thickness direction of the soft package battery, the first packaging part and the second packaging part can be attached in a sliding mode along the thickness direction of the soft package battery, the attaching surfaces of the first packaging part and the second packaging part are overlapped with the bisecting surface of the thickness direction of the soft package battery, and two ends of the first packaging part and two ends of the second packaging part protrude out of two ends of the soft package battery along the length direction of the soft package battery.
7. The vertical type soft package battery air extracting and packaging machine according to claim 1, wherein the puncturing piece comprises a connecting section and a puncturing section, the connecting section is movably connected with the inner bottom surface of the upper end cover and can slide up and down along the height direction of the upper end cover, the other end of the connecting section is connected with one end of the puncturing section, the puncturing section is arranged below the connecting section, and the puncturing section is obliquely close to the air bag.
8. The vertical pouch battery air-extracting and packaging machine according to claim 7, wherein when there is only one puncturing member, the puncturing member is located in the middle of the air bag along the length direction of the pouch battery, and when the number of the puncturing members is more than one, the puncturing members are arranged at equal intervals along the length direction of the pouch battery.
9. A pouch cell vertical pump-sealing method using the vertical pouch cell pump-sealing machine according to claim 1, 2, 3, 5, 6 or 7, which is characterized by comprising the following steps:
(1) the manipulator clamps a soft-package battery to be pumped and sealed and places the soft-package battery in the lower end cover, the soft-package battery slides downwards along the inclined section of the fixing piece, the side plane of the vertical section of the fixing piece is attached to the side face of the soft-package battery, and the first fixing piece and the second fixing piece are matched to clamp the soft-package battery tightly;
(2) the first pressing plate and the second pressing plate slide along the thickness direction of the soft package battery to be close to the soft package battery, and the side planes of the first pressing plate and the second pressing plate are attached to the side plane of the soft package battery and fix the soft package battery;
(3) the connecting section of the puncturing piece slides downwards along the height direction of the upper end cover, the puncturing section of the puncturing piece is contacted with the air bag and punctures the air bag, and the gas in the air bag is discharged through the puncturing opening;
(4) the upper end cover moves downwards and is attached to the lower end cover to form a sealed cavity, external air extraction equipment is used for extracting air from the sealed cavity, and air in the sealed cavity and air in the air bag are extracted together;
(5) heating the packaging parts, when the gas in the sealed cavity and the gas bag is completely pumped out, enabling the first packaging part and the second packaging part to be attached in a sliding mode along the thickness direction of the soft package battery, enabling the attaching surfaces of the first packaging part and the second packaging part to be overlapped with the bisecting surface of the soft package battery in the thickness direction, and carrying out heat sealing on the sealed edge of the soft package battery;
(6) after finishing sealing, the first pressing plate and the second pressing plate both slide along the thickness direction of the soft package battery to be far away from the soft package battery, and the manipulator clamps the soft package battery to take out the soft package battery from the fixing piece.
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| CN113193222A (en) * | 2021-04-19 | 2021-07-30 | 东莞市超业精密设备有限公司 | Vertical type air-exhaust packaging equipment for soft package battery |
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