CN111952527A - Packaging method and packaging equipment for flexible package lithium battery - Google Patents
Packaging method and packaging equipment for flexible package lithium battery Download PDFInfo
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- CN111952527A CN111952527A CN202010810175.4A CN202010810175A CN111952527A CN 111952527 A CN111952527 A CN 111952527A CN 202010810175 A CN202010810175 A CN 202010810175A CN 111952527 A CN111952527 A CN 111952527A
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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
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The application provides a packaging method and packaging equipment for a flexible package lithium battery. The packaging method of the flexible package lithium battery comprises the steps of carrying out pole piece preparation operation to obtain a positive pole piece and a negative pole piece; carrying out tab welding treatment on the positive plate and the negative plate; cutting the positive plate and the negative plate subjected to the tab welding treatment; winding the positive plate and the negative plate to obtain a semi-finished product of the battery cell; carrying out top sealing and packaging treatment on the semi-finished product of the battery core; carrying out side sealing packaging treatment on the semi-finished product of the battery cell; performing liquid injection operation on the semi-finished product of the battery cell after the side sealing packaging treatment to obtain a finished product of the battery cell; and carrying out edge voltage test on the finished product of the battery cell. According to the packaging method of the soft package lithium battery, after the tabs are welded on the positive plate and the negative plate and before winding is carried out, the tabs are cut into the lengths of the finished tabs of the lithium battery, so that the mutual winding interference of the tabs in the winding process is effectively reduced, and further the tab smoothness of the lithium battery and the use safety of the lithium battery are improved.
Description
Technical Field
The invention relates to the technical field of lithium battery packaging, in particular to a packaging method and packaging equipment for a flexible package lithium battery.
Background
The soft package lithium battery has the advantages of good safety performance, light weight, large capacity, small internal resistance, flexible design and the like, and is widely applied to the fields of mobile terminals, electric automobiles, wind power generation systems and the like. The flexible package lithium battery adopts the aluminum-plastic packaging film as a packaging material, the aluminum-plastic packaging film wrapped outside the battery cell needs to be thermally sealed in the production process, the heat seal comprises top seal and side seal, and the battery cell pole lug needs to be sealed in the top seal process. After the heat-seal molding, the battery cell needs to be subjected to a side voltage test.
Carry out the top to the plastic-aluminum packaging film and seal as the key step of soft packet of lithium cell production technology, nevertheless welded utmost point ear takes place crooked easily when coiling formation electric core, if not in time arrange crooked utmost point ear, can appear electric core utmost point ear and glue crooked phenomenon when carrying out the top to the plastic-aluminum packaging film step, when making battery utmost point ear glue bond with the plastic-aluminum packaging film, utmost point ear glue exposes or utmost point ear adhesive bonding is inseparable, and then causes battery utmost point ear crooked, influence lithium cell appearance, cause lithium cell weeping even, the safety in utilization of lithium cell has been reduced.
Therefore, the problem that the tab is easy to be inclined when the battery core is formed by winding is urgently solved so as to improve the smoothness and the use safety of the battery.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a packaging method and packaging equipment for a flexible package lithium battery.
The purpose of the invention is realized by the following technical scheme:
a packaging method of a soft package lithium battery comprises the following steps:
carrying out the preparation operation of the pole piece to obtain a positive pole piece and a negative pole piece;
carrying out tab welding treatment on the positive plate and the negative plate;
cutting the positive plate and the negative plate subjected to tab welding treatment;
winding the positive plate and the negative plate to obtain a semi-finished product of the battery cell;
carrying out top sealing packaging treatment on the semi-finished product of the battery core;
carrying out side sealing packaging treatment on the semi-finished product of the battery core;
performing liquid injection operation on the semi-finished product of the battery cell after the side sealing packaging treatment to obtain a finished product of the battery cell; and
and carrying out edge voltage test on the finished product of the battery cell.
In one embodiment, the step of performing the pole piece preparation operation includes the following steps:
preparing the anode slurry and the cathode slurry;
coating the positive electrode slurry on a positive electrode base material, and performing first drying operation to obtain a positive electrode plate;
and coating the negative electrode slurry on a negative electrode substrate, and performing second drying operation to obtain the negative electrode sheet.
In one embodiment, after the step of performing the winding operation on the positive electrode tab and the negative electrode tab and before the step of performing the top sealing and packaging process on the cell semi-finished product, the method further includes the following steps:
and carrying out hot-pressing shaping and short-circuit testing on the semi-finished product of the battery core.
In one embodiment, after the step of performing the hot press shaping and the short circuit test on the cell semi-finished product and before the step of performing the top sealing packaging processing, the method further includes the following steps:
and carrying out third drying treatment on the semi-finished product of the battery cell.
In one embodiment, the step of performing the top sealing and packaging process on the cell semi-finished product includes the following steps:
stamping an aluminum-plastic packaging film;
and under the inert gas environment, placing the battery cell in the aluminum-plastic packaging film for hot melting top sealing.
In one embodiment, the step of performing liquid injection operation on the cell semi-finished product after the side sealing packaging process includes the following steps:
fixing the semi-finished product of the battery cell after the top sealing treatment, and pulling open the air bag edge of the semi-finished product of the battery cell;
and injecting electrolyte into the aluminum plastic packaging film under the inert gas environment.
In one embodiment, before injecting the electrolyte into the aluminum-plastic packaging film in the inert gas environment, and after the step of fixing the cell semi-finished product after the top sealing treatment and pulling open the air bag edge of the cell semi-finished product, the method further includes the following steps:
and filling dry inert gas into the aluminum-plastic packaging film.
In one embodiment, after the step of injecting the electrolyte into the aluminum-plastic packaging film in the inert gas environment and before the step of performing the edge voltage test on the finished battery cell, the method further includes the following steps:
standing the finished product of the battery cell;
and carrying out battery formation operation on the battery core finished product subjected to standing treatment.
In one embodiment, after the step of performing the battery formation operation on the battery cell finished product after the standing treatment, and before the step of performing the side voltage test on the battery cell finished product, the method further includes the following steps:
and carrying out air exhaust packaging operation on the finished product of the battery cell in a dry environment.
The utility model provides a soft packet of lithium cell encapsulation equipment, adopt above-mentioned any embodiment soft packet of lithium cell encapsulation method right soft packet of lithium cell encapsulates, soft packet of lithium cell encapsulation equipment includes:
the sheet making mechanism is used for preparing the positive plate and the negative plate;
the tab welding mechanism is used for welding tabs of the positive plate and the negative plate;
the tab cutting mechanism is used for cutting tabs of the positive plate and the negative plate;
the rotary table mechanism comprises a base, a rotary table which is rotatably connected with the base and at least N clamps which are arranged on the rotary table, wherein the N clamps are used for positioning and clamping the battery cell, the base comprises a base body, and a short circuit test table, a top sealing table, a side sealing table, an air exhaust packaging table and a side voltage test table which are sequentially arranged on the same surface of the base body and are distributed at intervals along the circumferential direction of the rotary table, and the N clamps are respectively in one-to-one correspondence with the short circuit test table, the top sealing table, the side sealing table, the air exhaust packaging table and the side voltage test table; and
and the liquid injection mechanism is arranged between the top sealing platform and the side sealing platform and used for injecting liquid into the battery core.
Compared with the prior art, the invention has at least the following advantages:
according to the packaging method of the soft package lithium battery, after the tabs are welded on the positive plate and the negative plate and before winding is carried out, the tabs are cut into the lengths of the tabs of the finished lithium battery, so that the mutual winding interference of the tabs in the winding process is effectively reduced, the tabs are further skewed, and the tab smoothness of the lithium battery and the use safety of the lithium battery are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flowchart illustrating steps of a method for packaging a soft-packed lithium battery according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a turntable mechanism of a soft package lithium battery packaging device according to an embodiment of the present invention;
FIG. 3 is a schematic view of the clamp of the turntable mechanism shown in FIG. 2;
fig. 4 is a schematic structural diagram of an automatic opening mechanism of a soft package lithium battery packaging device according to an embodiment of the present invention;
FIG. 5 is a partial schematic view of the automatic opening mechanism of FIG. 4;
fig. 6 is a partially enlarged view of the automatic opening mechanism shown in fig. 4 at a.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The application provides a soft package lithium battery packaging method, which comprises the following steps: carrying out the preparation operation of the pole piece to obtain a positive pole piece and a negative pole piece; carrying out tab welding treatment on the positive plate and the negative plate; cutting the positive plate and the negative plate subjected to the tab welding treatment; winding the positive plate and the negative plate to obtain a semi-finished product of the battery cell; carrying out top sealing and packaging treatment on the semi-finished product of the battery core; carrying out side sealing packaging treatment on the semi-finished product of the battery cell; performing liquid injection operation on the semi-finished product of the battery cell after the side sealing packaging treatment to obtain a finished product of the battery cell; and carrying out edge voltage test on the finished product of the battery cell.
According to the packaging method of the soft package lithium battery, after the tabs are welded on the positive plate and the negative plate and before winding is carried out, the tabs are cut into the lengths of the finished tabs of the lithium battery, so that the mutual winding interference of the tabs in the winding process is effectively reduced, the phenomenon that the tabs are inclined is further caused, and the tab smoothness of the lithium battery and the use safety of the lithium battery are improved.
In order to better understand the method for encapsulating a lithium battery pack according to the present application, the method for encapsulating a lithium battery pack according to the present application is further described and explained below, referring to fig. 1, and the method for encapsulating a lithium battery pack according to the present application includes the following steps:
and S100, carrying out the preparation operation of the pole piece to obtain a positive pole piece and a negative pole piece. The positive plate comprises a positive base material and a positive active coating coated on the surface of the positive base material, and the positive active coating is compacted and dried after being coated on the surface of the positive base material to obtain the fully-dried positive plate with the preset compaction density. The negative pole piece comprises a negative pole base material and a negative pole active material coated on the surface of the negative pole base material, the negative pole active material is coated on the surface of the negative pole base material and then needs to be compacted and dried to obtain a fully dried negative pole piece with a preset compaction density, and the positive pole piece and the negative pole piece which are compacted to the preset compaction density and fully dried have higher energy density and better charge-discharge cycle performance.
And S200, carrying out tab welding treatment on the positive plate and the negative plate. And carrying out tab welding operation on the positive plate and the negative plate obtained by the pole piece preparation operation, and respectively welding tabs on the positive substrate and the negative substrate, wherein tab welding needs to be carried out before the positive plate and the negative plate are wound, otherwise, tab welding is difficult to realize.
And S300, cutting the electrode lug of the positive plate and the negative plate subjected to the electrode lug welding treatment. It can be understood that, in the conventional lithium battery packaging process, the tab needs to be cut after the top sealing of the lithium battery, so as to obtain a battery core with a length suitable for the tab. If before coiling, cut the utmost point ear earlier, can cause positive pole ear and negative pole ear after coiling to expose the length of arranging outside the electricity core and have the deviation for positive pole ear and negative pole ear length inconsistent after coiling, need the secondary to cut. In this embodiment, the purpose of cutting the utmost point ear operation at first is that reduce the intertwine between anodal ear and the negative pole ear and disturb, causes anodal ear or negative pole ear crooked for utmost point ear glues crooked condition, has avoided the encapsulation back electric core leakproofness variation and the encapsulation back electric core outward appearance to receive the influence.
S400, winding the positive plate and the negative plate to obtain a semi-finished product of the battery cell. The traditional soft package lithium battery packaging method is characterized in that cutting operation is carried out after a finished battery cell product, and the lengths of a positive tab and a negative tab after winding are inconsistent, so that at least two times of cutting operation is required when the cutting operation is carried out.
And S500, carrying out top sealing packaging treatment on the battery cell semi-finished product. And (3) carrying out top sealing packaging on the obtained battery cell, so that the tab glue is bonded with the aluminum-plastic packaging film, and the aluminum-plastic packaging film is bonded with each other.
S600, side sealing and packaging are carried out on the battery cell semi-finished product. Still need carry out the side seal of plastic-aluminum encapsulation membrane after the encapsulation of top seal, electrolyte takes place to reveal when avoiding annotating the liquid.
S700, performing liquid injection operation on the battery cell semi-finished product subjected to the side sealing packaging treatment to obtain a battery cell finished product. It can be understood that, the plastic-aluminum packaging film after the top seal still remains one side and is not completely sealed, this side is the gasbag limit, then form the opening on the gasbag limit, be used for pouring into the plastic-aluminum packaging film with electrolyte, but the opening on the gasbag limit of the plastic-aluminum packaging film after the top seal can laminate each other, need open the opening on the gasbag limit when annotating the liquid, just can pour into the plastic-aluminum packaging film with electrolyte, consequently, in order to open the opening of plastic-aluminum packaging film on this side, in one of them embodiment, use automatic opening mechanism splint to open the opening of plastic-aluminum packaging film.
And S800, performing side voltage test on the finished product of the battery cell. After the side sealing packaging treatment, whether the inside and the outside of the battery core are short-circuited or not needs to be detected, so that the defective products of the lithium battery are effectively screened out, and the product quality of the lithium battery is improved.
According to the packaging method of the soft package lithium battery, after the tabs are welded on the positive plate and the negative plate and before winding is carried out, the tabs are cut into the lengths of the finished tabs of the lithium battery, so that the mutual winding interference of the tabs in the winding process is effectively reduced, the phenomenon that the tabs are inclined is further caused, and the tab smoothness of the lithium battery and the use safety of the lithium battery are improved.
In one embodiment, the pole piece preparation operation comprises the following steps: the preparation operations of the positive electrode slurry and the negative electrode slurry are respectively carried out. In this embodiment, the positive electrode slurry includes a positive electrode active material, a conductive material, and a binder. Further, the positive active material is a mixture of nickel cobalt manganese ternary, lithium manganate and lithium cobaltate. Further, the binder is polyvinylidene fluoride. Further, the conductive material is carbon nanotubes. Specifically, the operation of respectively preparing the cathode slurry and the anode slurry specifically comprises the following steps: carrying out preparation operation of the anode slurry; and (5) carrying out preparation operation of the cathode slurry. Further, the performing of the preparation operation of the positive electrode slurry includes: fully and uniformly mixing the positive active material and the conductive material; adding the binder by an equivalent progressive method to fully and uniformly mix the binder, the active material and the conductive material; adding solvent to fully wet the adhesive, the active material and the conductive material. It can be understood that the uniformity of the cathode slurry affects various performances of the lithium battery, and the mixing uniformity of the cathode slurry is improved through the preparation operation of the cathode slurry. The negative electrode slurry includes a negative electrode active material, a conductive material, and a binder, and the negative electrode active material includes lithium carbonate and graphite. The conductive material is conductive carbon black. The adhesive is at least one of sodium alginate and chitosan. Further, the performing of the preparation operation of the anode slurry includes: fully and uniformly mixing the negative active material and the conductive material; adding the binder by an equivalent progressive method to fully and uniformly mix the binder, the active material and the conductive material; adding solvent to fully wet the adhesive, the active material and the conductive agent. It can be understood that the uniformity of the negative electrode slurry affects various performances of the lithium battery, and the mixing uniformity of the negative electrode slurry is improved through the preparation operation of the negative electrode slurry.
Further, the method also comprises the following steps after the preparation operation of the positive electrode slurry is carried out: and coating the positive electrode slurry on a positive electrode base material, and performing first drying operation to obtain a positive electrode plate. It can be understood that the first drying operation is to remove moisture from the positive electrode sheet and to perform multi-stage temperature step-by-step drying on the positive electrode sheet, wherein the temperature stages are 70-80 ℃, 95-100 ℃, 85-90 ℃ and 100-105 ℃ respectively. The moisture contained in the positive electrode sheet can be sufficiently removed by the first drying operation.
Further, the method also comprises the following steps after the preparation operation of the anode slurry is carried out: and coating the negative electrode slurry on a negative electrode substrate, and performing a second drying operation to obtain a negative electrode sheet. It can be understood that the second drying operation is to remove moisture from the negative electrode sheet and to perform multi-stage temperature step-by-step drying of the negative electrode sheet, the temperature stages being 70 to 80 ℃, 95 to 100 ℃, 85 to 90 ℃ and 100 to 105 ℃ respectively. The moisture contained in the negative electrode sheet can be sufficiently removed by the second drying operation described above.
In one embodiment, after the step of performing the winding operation on the positive electrode sheet and the negative electrode sheet and before the step of performing the top sealing packaging treatment on the cell semi-finished product, the method further includes the following steps: and carrying out hot-pressing shaping and short-circuit testing on the semi-finished product of the battery cell. It can be understood that the purpose of hot-pressing shaping is to improve the flatness of the lithium battery, make the thickness of the semi-finished product of the battery cell have higher consistency, make the diaphragm closely fit with the positive plate and the negative plate, expel the air in the semi-finished product of the battery cell, shorten the diffusion distance of lithium ions and reduce the internal resistance of the lithium battery. The purpose of the short circuit test is to detect whether micro short circuit exists in the semi-finished product of the battery cell, select unqualified products in time, find problems in time, adjust corresponding parameters of hot-pressing shaping, and reduce the unqualified rate of the lithium battery.
It can be understood that the purpose of hot-pressing shaping is to improve the flatness of the lithium battery, make the thickness of the semi-finished product of the battery cell have higher consistency, make the diaphragm closely fit with the positive plate and the negative plate, expel the air in the semi-finished product of the battery cell, shorten the diffusion distance of lithium ions and reduce the internal resistance of the lithium battery. Therefore, hot-pressing shaping is an essential process for lithium battery preparation, in the actual hot-pressing shaping process, if the position of the lug of the lithium battery cannot be identified, an included angle is formed between the plane where the lug is located and the plane where the template of the hot-pressing shaping mechanism is located, so that the plane where the lug of the semi-finished battery cell is located after hot-pressing shaping is not parallel to the plane where the template of the hot-pressing shaping mechanism is located, and further the lug is crumpled in the top sealing process, and the lug glue cannot be tightly bonded with an aluminum plastic packaging film, so that leakage of the semi-finished battery cell is caused.
In order to maintain the flatness of the two tabs of the lithium battery, reduce the leakage of the semi-finished battery cell and improve the safety performance of the lithium battery, in one embodiment, before the hot press shaping, the packaging method further comprises the following steps:
placing the semi-finished product of the battery cell on a template of a hot-pressing shaping mechanism;
clamping one end of the semi-finished product of the battery cell, which is far away from the positive electrode lug and the negative electrode lug;
rotating the semi-finished product of the battery cell;
measuring the distances between two points on one side surface of the template of the hot-pressing shaping mechanism adjacent to the at least one lug and the plane of the template of the hot-pressing shaping mechanism in real time, namely measuring the distance between one point on one side surface of the template of the hot-pressing shaping mechanism adjacent to the at least one lug and the plane of the template of the hot-pressing shaping mechanism as a first distance, and measuring the distance between the other point on one side surface of the template of the hot-pressing shaping mechanism adjacent to the at least one lug and the plane of the template of the hot-pressing shaping mechanism as a second distance;
judging whether the first distance is equal to the second distance or not, if so, knowing that the plane of the positive electrode lug or the negative electrode lug is parallel to the plane of the template of the hot-pressing shaping mechanism, and stopping the rotation of the semi-finished product of the battery cell; otherwise, the plane of the positive electrode lug or the negative electrode lug is not parallel to the plane of the template of the hot-pressing shaping mechanism, so that the semi-finished product of the battery cell is continuously rotated.
In this embodiment, before performing hot press shaping, the battery cell semi-finished product is adjusted, two infrared sensors are additionally installed on a hot press shaped template, and a distance between sensing points of the two infrared sensors is smaller than a width of a positive electrode tab or a negative electrode tab.
In one embodiment, after the step of performing the hot press shaping and the short circuit test on the cell semi-finished product and before the step of performing the top sealing packaging processing, the method further includes the following steps: and carrying out third drying treatment on the semi-finished product of the battery cell. It can be understood that, in the hot-press shaping and short-circuit testing processes, the inside of the half-finished battery cell product can absorb moisture, and in order to ensure various performances of the lithium battery, the lithium battery needs to be subjected to a third drying treatment to remove moisture in the half-finished battery cell product. The third drying process comprises the following steps: and drying the semi-finished product of the battery cell step by step at a plurality of temperatures, wherein the temperatures are respectively 70-80 ℃, 95-100 ℃, 85-90 ℃ and 100-105 ℃. The moisture in the cell semi-finished product can be sufficiently removed through the third drying operation.
In one embodiment, the step of performing top sealing packaging processing on the cell semi-finished product includes the following steps: and stamping the aluminum-plastic packaging film. When the top seal is packaged, a flat aluminum-plastic packaging film needs to be punched to form a groove. The groove is used for placing the semi-finished product of the battery cell.
Further, under the inert gas environment, the semi-finished product of the battery cell is placed in an aluminum-plastic packaging film for hot melting top sealing. The hot melting capping process is carried out in an inert gas environment, so that the phenomenon that substances inside the semi-finished product of the battery cell react due to high temperature is avoided, and the air content in the aluminum-plastic packaging film is reduced. It should be noted that, in the embodiment, the inert gas is a heating inert gas, which can reduce moisture brought into the cell semi-finished product.
In one embodiment, the step of performing liquid injection operation on the cell semi-finished product subjected to the side sealing packaging treatment includes the following steps: fixing the semi-finished product of the battery cell after the top sealing treatment, and pulling open the air bag edge of the semi-finished product of the battery cell. The automatic opening mechanism is used for fixing and pulling open the air bag edge of the semi-finished battery cell, so that the pulling speed of the air bag edge of the semi-finished battery cell is improved, and the liquid injection efficiency of the lithium battery is further improved.
Further, under the inert gas environment, electrolyte is injected into the aluminum-plastic packaging film. It can be understood that the electrolyte is easy to be oxidized and reduced, so the electrolyte needs to be injected into the aluminum-plastic packaging film under the inert gas environment, and the problem of reducing the content of effective substances of the electrolyte is avoided.
In one embodiment, before injecting the electrolyte into the aluminum-plastic packaging film in the inert gas environment, and after the step of fixing the top-sealed cell semi-finished product and pulling open the air bag edge of the cell semi-finished product, the method further comprises the following steps: and filling dry inert gas into the aluminum-plastic packaging film. The purpose of filling dry inert gas into the aluminum-plastic packaging film is to expel air in the aluminum-plastic packaging film, so that the problem of reducing the content of active substances of the electrolyte is avoided, and the stability of the lithium battery is improved.
In one embodiment, after the step of injecting the electrolyte into the aluminum-plastic packaging film in the inert gas environment and before the step of performing the edge voltage test on the finished battery cell product, the method further includes the following steps: standing the finished product of the battery cell; and carrying out battery formation operation on the battery core finished product subjected to standing treatment. Through the standing treatment and the battery formation operation, the electrolyte fully infiltrates the finished product of the battery core, and the charge-discharge cycle performance of the lithium battery is improved.
In one embodiment, after the step of performing the battery formation operation on the battery cell finished product after the standing treatment, and before the step of performing the side voltage test on the battery cell finished product, the method further includes the following steps: and carrying out air exhaust packaging operation on the finished product of the battery cell in a dry environment. . After the lithium battery is formed, gas generated in the finished product of the battery core needs to be pumped out, and then the finished product of the battery core is packaged again, so that the stability of the lithium battery is improved.
Hereinafter, the cell semi-finished product and the cell finished product are collectively referred to as a cell.
The application also provides a soft package lithium battery packaging device, and the soft package lithium battery is packaged by adopting the soft package lithium battery packaging method of any one of the embodiments. In order to better understand the lithium-ion battery soft package packaging device of the present application, the following further explains and explains the lithium-ion battery soft package packaging device of the present application, referring to fig. 2 and 3, an embodiment of the lithium-ion battery soft package packaging device includes a sheet making mechanism, a tab welding mechanism, a tab cutting mechanism, a turntable 120, a mechanism 100, and a liquid injection mechanism. The sheet making mechanism is used for preparing the positive plate and the negative plate. The tab welding mechanism is used for welding tabs of the positive plate and the negative plate. The tab cutting mechanism is used for cutting tabs of the positive plate and the negative plate. Turntable 120 mechanism 100 includes base 110, the turntable 120 of being connected rotates with base 110 and sets up N at least anchor clamps 130 on turntable 120, N anchor clamps 130 all are used for the tight electric core of location clamp, base 110 includes base body 111 and locates base body 111 in proper order and on the same face and along the short circuit testboard 112 of the circumference interval distribution of turntable 120, top seal platform 113, side seal platform 114, bleed encapsulation platform 115 and limit voltage testboard 116, N anchor clamps 130 respectively with short circuit testboard 112, top seal platform 113, side seal platform 114, bleed encapsulation platform 115 and limit voltage testboard 116 one-to-one. The liquid injection mechanism is arranged between the top sealing platform 113 and the side sealing platform 114, and the liquid injection mechanism is used for injecting liquid into the battery core.
Foretell soft packet of lithium battery packaging equipment has adjusted film-making mechanism, utmost point ear welding mechanism, has cut utmost point ear mechanism, carousel mechanism 100 and has annotated the connection of liquid mechanism for after anodal piece and negative pole piece welding utmost point ear, cut utmost point ear promptly, when making the electric core that anodal piece and negative pole piece coiling formed carry out the top seal in carousel mechanism 100, annotate liquid and side seal, the utmost point ear of electric core all has higher planarization, has ensured the outward appearance and the safety in utilization of lithium cell.
It should be noted that the film making mechanism, the tab welding mechanism, the tab cutting mechanism and the liquid injection mechanism in the soft package lithium battery packaging equipment are original equipment, and only the connection relation is correspondingly adjusted or parts are correspondingly added. If not described in detail, the equipment is the original equipment. Referring to fig. 3, in one embodiment, each of the clamps 130 includes a base plate 131, a first connecting post 132, a second connecting post 133, a rotating shaft 134, a connecting rod 135, a pulling member 136 and a clamp body 137. The substrate 131 is connected to the turntable. The substrate 131 is provided with a positioning groove 1311, and the positioning groove 1311 is used for placing a battery cell. The first connecting column 132 and the second connecting column 133 are disposed on the substrate 131, and the second connecting column 133 and the first connecting column 132 are disposed side by side. Both ends of the rotating shaft 134 are rotatably connected to the first connecting post 132 and the second connecting post 133, respectively. The connecting rod 135 is connected to the rotating shaft 134. The pulling member 136 is connected to the connecting rod 135, and the extending direction of the pulling member 136 forms an angle with the extending direction of the connecting rod 135. The clamp body 137 is connected to the connecting rod 135, the clamp body 137 is used for clamping the battery cell on the substrate 131, and the clamp 130 corresponds to the positioning slot 1311.
Because the both ends of axis of rotation 134 rotate respectively with first spliced pole 132 and second spliced pole 133 and be connected, connecting rod 135 is connected with axis of rotation 134, trip piece 136 is connected with connecting rod 135, make trip piece 136 be connected with axis of rotation 134 through connecting rod 135, again because anchor clamps body 137 connects in connecting rod 135, so that the user opens anchor clamps body 137 through trip piece 136 fast, improved the speed that anchor clamps body 137 pressed from both sides tight location electricity core, improved anchor clamps 130's convenient to use nature. Because the positioning groove 1311 is formed in the substrate 131, the battery cell is located in the positioning groove 1311, and thus the battery cell is reliably positioned. In this embodiment, the substrates 131 of the N clamps 130 respectively correspond to the short circuit test station, the top seal station, the side seal station, the pumping package station, and the side voltage test station one to one, so that the N clamps 130 respectively correspond to the short circuit test station 112, the top seal station 113, the side seal station 114, the pumping package station 115, and the side voltage test station 116 one to one.
Referring to fig. 3, in one embodiment, two positioning protrusions 138 are disposed in the positioning groove 1311, both the positioning protrusions 138 are connected to the substrate 131, and the two positioning protrusions 138 correspond to the positive electrode tab and the negative electrode tab of the battery cell, respectively. The two positioning protrusions 138 are used for positioning the positive electrode lug and the negative electrode lug of the battery cell, so that the positioning accuracy of the positive electrode lug and the negative electrode lug of the lithium battery is improved. In the present embodiment, the two positioning protrusions 138 are insulating positioning protrusions 138. The short circuit test and the side circuit test are prevented from being influenced when the positive electrode tab and the negative electrode tab are in contact with the positioning projection 138.
In one embodiment, the soft-packed lithium battery packaging device further includes a driving mechanism disposed on the base body 111. The power output end of the driving mechanism is connected with the turntable 120, and the driving mechanism drives the turntable 120 to rotate relative to the base 110, so that different battery cells can rotate to different positions along with the turntable 120, and the battery cells are subjected to short circuit testing, top sealing, side sealing, air exhaust packaging, side circuit testing and other procedures.
It can be understood, soft packet of lithium cell is through the top back of sealing, the aluminium-plastic packaging film is still remained one side and is not totally enclosed, then form the opening on this side, be used for pouring into the aluminium-plastic packaging film with electrolyte, this side is the gasbag limit, the opening of this side is the opening on the gasbag edge, the opening on gasbag limit is used for pouring into the aluminium-plastic packaging film with electrolyte, but the aluminium-plastic packaging film after the side seals can laminate each other, lead to the opening closure on the gasbag edge, need open the opening on gasbag edge when annotating liquid, just can pour into the aluminium-plastic packaging film with electrolyte into, the open mode of the opening on general gasbag edge is opened for the manual work, and the opening on the gasbag edge is less, it is more difficult to open, it is lower to cause soft packet of lithium cell. Therefore, in order to improve the production efficiency of the soft package lithium battery and solve the problem that the opening on the edge of the air bag is difficult to open, in one embodiment, the packaging equipment of the soft package lithium battery further comprises an automatic opening mechanism 200, the opening mechanism is connected with a liquid injection mechanism, and the automatic opening mechanism 200 is used for realizing the quick opening of the opening on the edge of the air bag.
For a better understanding of the automatic opening mechanism 200, the automatic opening mechanism 200 is further explained and illustrated below:
referring to fig. 4-6, an embodiment of an automatic opening mechanism 200 includes a clamp cylinder 210, a first clamp plate 220, a second clamp plate 230, and a suction pump (not shown). The clamping cylinder 210 includes a cylinder body 211, a first collet 212 and a second collet 213 connected to a power output end of the cylinder body, and the cylinder body 211 drives the first collet 212 and the second collet 213 to approach or separate from each other. The first splint 220 includes a first splint body 221 and a first air-absorbing member 222, the first air-absorbing member 222 is disposed on the side surface of the first splint body 221, the first splint body 221 is connected with the first clip 212, and the first air-absorbing member 222 is used for absorbing the aluminum plastic packaging film. The second clamping plate 230 comprises a second clamping plate body 231 and a second air suction piece 232, the second clamping plate body 231 is arranged corresponding to the first clamping plate body 221, the second clamping plate body 231 is connected with the second clamping head 213, the second air suction piece 232 is arranged on the side face, close to the first clamping plate body 221, of the second clamping plate body 231, the second air suction piece 232 is arranged between the first air suction piece 222 and the second clamping plate body 231, and the second air suction piece 232 is used for sucking the aluminum-plastic packaging film. The active end of the suction pump is respectively communicated with the air holes of the first suction piece 222 and the air holes of the second suction piece 232.
In the automatic opening mechanism 200, the first clamp body 221 is connected to the first chuck 212 of the clamping cylinder 210, the second clamp body 231 is connected to the second chuck 213 of the clamping cylinder 210, and the clamping cylinder 210 drives the first clamp body 221 and the second clamp body 231 to move relatively, so as to clamp and release the first clamp body 221 and the second clamp body 231, and the first air-absorbing member 222 and the second air-absorbing member 232 are correspondingly disposed, so that when the first clamp body 221 and the second clamp body 231 are clamped and released, the first air-absorbing member 222 and the second air-absorbing member 232 are driven to clamp and release, when the air bag opening needs to be opened, the air bag is clamped between the first clamp body 221 and the second clamp body 231, then the first clamp body 221 and the second clamp body 231 are released, and at this time, the air pump respectively pumps air inside the first air-absorbing member 222 and the second air-absorbing member 232, the first splint body 221 and the second splint body 231 loosen and drive the first air suction piece 222 and the second air suction piece 232 to loosen the aluminum-plastic packaging film at the edge of the air bag, and when the first air suction piece 222 and the second air suction piece 232 loosen the aluminum-plastic packaging film at the edge of the air bag, the first air suction piece 222 and the second air suction piece 232 suck the aluminum-plastic packaging film at the edge of the air bag, so that the opening at the edge of the air bag is driven to be opened.
Referring to fig. 5, in one embodiment, the first air suction member 222 is provided with a first nozzle 2221 and a first air suction cavity, the air holes of the first air suction member 222 are provided in the first nozzle 2221, the first nozzle 2221 opens toward the second air suction member 232, the first air suction cavity is communicated with the first nozzle 2221, and the first air suction cavity is communicated with the air suction pump. It can be understood that the first suction nozzle 2221 and the first suction cavity of the first suction member 222 are connected to the suction pump, so that a negative pressure is formed in the first suction cavity, and then the aluminum-plastic packaging film at the edge of the air bag is sucked by the first suction nozzle 2221, so that the quick opening of the edge opening of the air bag is realized, and the liquid injection efficiency of the lithium battery is further improved.
In one embodiment, a first filter is provided at the first nozzle 2221 to prevent a problem in which larger substances in the air are sucked into the first suction member 222, resulting in clogging of the first suction chamber.
In one embodiment, the second air suction member 232 is provided with a second suction nozzle and a second air suction cavity, the air hole of the second air suction member 232 is opened in the second suction nozzle, the second suction nozzle opens toward the second air suction member 232, the second air suction cavity is communicated with the second suction nozzle, and the second air suction cavity is communicated with the air suction pump. It can be understood that the second suction nozzle and the second suction cavity of the second suction part 232 are connected with the air pump, so that negative pressure is formed in the second suction cavity, the aluminum-plastic packaging film at the edge of the air bag is sucked by the second suction nozzle, the quick opening of the opening at the edge of the air bag is realized, and the liquid injection efficiency of the lithium battery is further improved.
In one embodiment, a second filter is provided at the second suction nozzle to prevent the problem of larger substances in the air being sucked into the second suction member 232, which would cause clogging of the second suction chamber.
In one embodiment, the suction pump includes a first suction pump disposed in the first suction chamber and a second suction pump disposed in the second suction chamber. The first air pump and the second air pump are micro air pumps, and the first air pump and the second air pump are respectively used for enabling negative pressure to be formed in the first air suction cavity and the second air suction cavity, so that the first air suction piece 222 and the second air suction piece 232 can stably suck the aluminum-plastic packaging film at the edge of the air bag.
Referring to fig. 4 and 6, in one embodiment, the automatic opening mechanism 200 further includes a fixing clamp 250, and the fixing clamp 250 is disposed corresponding to the first clamping plate 220 and the second clamping plate 230, respectively. It can be understood that mounting fixture 250 is used for fixed plastic-aluminum packaging film, and mounting fixture 250 corresponds the setting with first splint 220 and second splint 230 respectively, has improved the stability of placing of plastic-aluminum packaging film, is favorable to first splint and second splint to press from both sides tightly in electric core reliably simultaneously.
Referring to fig. 6, further, the fixing clamp 250 includes a fixing clamp body 251, a first fixing clamp plate 252 and a second fixing clamp plate 253, the fixing clamp body 251 is connected to the first fixing clamp plate 252 and the second fixing clamp plate 253 respectively, the first fixing clamp plate 252 and the second fixing clamp plate 253 are disposed at two edges of the fixing clamp body 251, the first fixing clamp plate 252 is disposed corresponding to the first clamp plate 220, and the second fixing clamp plate 253 is disposed corresponding to the second clamp plate 230. The mounting fixture body 251 is used for fixed first solid fixed splint 252 and the solid fixed splint 253 of second, first solid fixed splint 252 and the solid fixed splint 253 of second are used for pressing from both sides tight plastic-aluminum packaging film, first solid fixed splint 252 corresponds the setting with first splint 220, the solid fixed splint 253 of second corresponds the setting with second splint 230, when first solid fixed splint 252 and the solid fixed splint 253 of second press from both sides the tight plastic-aluminum packaging film, the gasbag limit is towards first splint 220 and second splint 230, mounting fixture 250, first splint 220 and the cooperation of second splint 230 are used, the stability of placing of plastic-aluminum packaging film when the gasbag limit opening is opened has been improved.
In one embodiment, the first fixing clip 252 includes a first soft rubber clamping portion 2521 and a first hollow portion 2522, the first hollow portion 2522 is connected to the fixing clip body 251 and the first soft rubber clamping portion 2521, respectively, and the first hollow portion 2522 is located between the fixing clip body 251 and the first soft rubber clamping portion 2521. The second fixing splint 253 includes a second soft rubber clamping portion 2531 and a second hollow portion 2532, the second hollow portion 2532 is connected to the fixing clamp body 251 and the second soft rubber clamping portion 2531, and the second hollow portion 2532 is located between the fixing clamp body 251 and the second soft rubber clamping portion 2531. First flexible glue clamping part 2521 and second flexible glue clamping part 2531 have soft elasticity, have avoided the problem that the plastic-aluminum packaging film received the damage when first fixed splint 252 and second fixed splint 253 press from both sides tight plastic-aluminum packaging film. The first hollow portion 2522 reduces the contact area of the first fixing clamp plate 520 and the aluminum-plastic packaging film, and the second hollow portion 2532 reduces the contact area of the second fixing clamp plate 253 and the aluminum-plastic packaging film, thereby further avoiding the problem that the aluminum-plastic packaging film is damaged when the first fixing clamp plate 252 and the second fixing clamp plate 253 clamp the aluminum-plastic packaging film. In the embodiment, the first hollow portion 2522 is a first aluminum hollow portion, and the second hollow portion 2532 is a second aluminum hollow portion, so that the contact area between the first fixing clip 252 and the aluminum-plastic packaging film and the contact area between the second fixing clip 253 and the aluminum-plastic packaging film are reduced, and the structural strength of the first fixing clip 252 and the second fixing clip 253 are improved.
In one embodiment, the first hollow portion 2522 is formed with a plurality of first hollow holes 2523, and the plurality of first hollow holes 2523 are arranged in the first hollow portion 2522 in an array. Set up a plurality of first fretwork holes 2523 at first fretwork portion 2522, reduced the area of contact of first solid fixed splint 252 with the plastic-aluminum packaging film, when having avoided first solid fixed splint 252 and second solid fixed splint 253 to press from both sides tight plastic-aluminum packaging film, the plastic-aluminum packaging film receives the problem of damage.
In one embodiment, the second hollow portion 2532 is formed with a plurality of second hollow holes 2533, and the plurality of second hollow holes 2533 are arranged in the second hollow portion 2532 in an array. Set up a plurality of second fretwork holes 2533 on second fretwork portion 2532, reduced the area of contact of second fixed splint 253 with the plastic-aluminum packaging film, when having avoided first fixed splint 252 and second fixed splint 253 to press from both sides tight plastic-aluminum packaging film, the plastic-aluminum packaging film receives the problem of damage.
The application also provides a liquid injection device of a soft package lithium battery, which comprises the automatic opening mechanism 200 in any embodiment. The automatic opening mechanism 200 includes a clamping cylinder 210, a first clamping plate 220, a second clamping plate 230, and a suction pump. The first clamp plate 220 includes a first clamp plate body 221 and a first air suction member 222, the first air suction member 222 is disposed on a side surface of the first clamp plate body 221, and the first clamp plate body 221 is connected with a power output end of the clamp cylinder 210. The second clamping plate 230 comprises a second clamping plate body 231 and a second air suction piece 232, the second clamping plate body 231 is arranged corresponding to the first clamping plate body 221, the second clamping plate body 231 is connected with the power output end of the clamping cylinder 210, the second air suction piece 232 is arranged on the side face, close to the first clamping plate body 221, of the second clamping plate 230, and the second air suction piece 232 is arranged between the first air suction piece 222 and the second clamping plate body 231. The suction pump is connected to the first suction member 222 and the second suction member 232, respectively.
The automatic opening mechanism 200 utilizes the clamping cylinder 210 to drive the first clamping plate 220 and the second clamping plate 230 to move relatively, so that the first clamping plate 220 and the second clamping plate 230 can clamp and loosen the aluminum-plastic packaging film at the edge of the air bag, the first air suction piece 222 and the second air suction piece 232 are both connected with the air pump, the first air suction piece 222 and the second air suction piece 232 are used for respectively sucking the aluminum-plastic packaging film at the edge of the air bag, when the first splint 220 and the second splint 230 are fitted to each other to release the aluminum plastic packaging film at the edge of the air bag, the first and second air-absorbing members 222 and 232 open the opening of the side of the air bag, enabling the opening of the side of the air bag to be opened rapidly, and then soft packet of lithium cell priming device, and foretell soft packet of lithium cell priming device has utilized automatic opening mechanism 200, has realized that the limit open-ended of gasbag is opened fast, has improved lithium cell and has annotated liquid efficiency, and then has improved soft packet of lithium cell's production efficiency.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for packaging a soft package lithium battery is characterized by comprising the following steps:
carrying out the preparation operation of the pole piece to obtain a positive pole piece and a negative pole piece;
carrying out tab welding treatment on the positive plate and the negative plate;
cutting the positive plate and the negative plate subjected to tab welding treatment;
winding the positive plate and the negative plate to obtain a semi-finished product of the battery cell;
carrying out top sealing packaging treatment on the semi-finished product of the battery core;
carrying out side sealing packaging treatment on the semi-finished product of the battery core;
performing liquid injection operation on the semi-finished product of the battery cell after the side sealing packaging treatment to obtain a finished product of the battery cell; and
and carrying out edge voltage test on the finished product of the battery cell.
2. The packaging method for the soft-package lithium battery as claimed in claim 1, wherein the step of performing the preparation operation of the pole piece comprises the following steps:
preparing the anode slurry and the cathode slurry;
coating the positive electrode slurry on a positive electrode base material, and performing first drying operation to obtain a positive electrode plate;
and coating the negative electrode slurry on a negative electrode substrate, and performing second drying operation to obtain the negative electrode sheet.
3. The method for packaging the soft-package lithium battery as claimed in claim 1, further comprising the following steps after the step of performing the winding operation on the positive electrode sheet and the negative electrode sheet and before the step of performing the top-sealing packaging treatment on the semi-finished battery cell product:
and carrying out hot-pressing shaping and short-circuit testing on the semi-finished product of the battery core.
4. The packaging method of the lithium battery pack as claimed in claim 3, wherein after the step of performing the hot press shaping and the short circuit test on the semi-finished battery core product and before the step of performing the top seal packaging, the method further comprises the following steps:
and carrying out third drying treatment on the semi-finished product of the battery cell.
5. The packaging method of the soft package lithium battery of claim 1, wherein the step of performing the top sealing packaging process on the semi-finished battery core product comprises the following steps:
stamping an aluminum-plastic packaging film;
and under the inert gas environment, placing the battery cell in the aluminum-plastic packaging film for hot melting top sealing.
6. The packaging method of the lithium battery pack as claimed in claim 5, wherein the step of performing liquid injection operation on the semi-finished battery cell product subjected to the side sealing packaging treatment comprises the following steps:
fixing the semi-finished product of the battery cell after the top sealing treatment, and pulling open the air bag edge of the semi-finished product of the battery cell;
and injecting electrolyte into the aluminum plastic packaging film under the inert gas environment.
7. The packaging method of the soft package lithium battery of claim 6, wherein before the electrolyte is injected into the aluminum-plastic packaging film in an inert gas environment, and after the steps of fixing the top-sealed semi-finished battery cell and pulling open the air bag edge of the semi-finished battery cell, the packaging method further comprises the following steps:
and filling dry inert gas into the aluminum-plastic packaging film.
8. The packaging method of the soft package lithium battery of claim 6, wherein after the step of injecting the electrolyte into the aluminum-plastic packaging film in the inert gas environment and before the step of performing the edge voltage test on the finished battery cell, the method further comprises the following steps:
standing the finished product of the battery cell;
and carrying out battery formation operation on the battery core finished product subjected to standing treatment.
9. The method for packaging the lithium battery pack according to claim 8, wherein after the step of performing the battery formation operation on the battery cell finished product after the standing treatment and before the step of performing the side voltage test on the battery cell finished product, the method further comprises the following steps:
and carrying out air exhaust packaging operation on the finished product of the battery cell in a dry environment.
10. The utility model provides a soft packet of lithium cell encapsulation equipment, characterized in that adopts any claim 1 ~ 9 soft packet of lithium cell encapsulation method right soft packet of lithium cell encapsulates, soft packet of lithium cell encapsulation equipment includes:
the sheet making mechanism is used for preparing the positive plate and the negative plate;
the tab welding mechanism is used for welding tabs of the positive plate and the negative plate;
the tab cutting mechanism is used for cutting tabs of the positive plate and the negative plate;
the rotary table mechanism comprises a base, a rotary table which is rotatably connected with the base and at least N clamps which are arranged on the rotary table, wherein the N clamps are used for positioning and clamping the battery cell, the base comprises a base body, and a short circuit test table, a top sealing table, a side sealing table, an air exhaust packaging table and a side voltage test table which are sequentially arranged on the same surface of the base body and are distributed at intervals along the circumferential direction of the rotary table, and the N clamps are respectively in one-to-one correspondence with the short circuit test table, the top sealing table, the side sealing table, the air exhaust packaging table and the side voltage test table; and
and the liquid injection mechanism is arranged between the top sealing platform and the side sealing platform and used for injecting liquid into the battery core.
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Denomination of invention: Packaging method and equipment for flexible packaging lithium batteries Effective date of registration: 20230721 Granted publication date: 20221227 Pledgee: Meixian Sub branch of Postal Savings Bank of China Co.,Ltd. Pledgor: MEIZHOU LIANGNENG NEW ENERGY TECHNOLOGY CO.,LTD. Registration number: Y2023980049324 |
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