CN110544789A - Battery cell air-extracting edge-sealing method and battery cell air-extracting edge-sealing device - Google Patents
Battery cell air-extracting edge-sealing method and battery cell air-extracting edge-sealing device Download PDFInfo
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- CN110544789A CN110544789A CN201910816945.3A CN201910816945A CN110544789A CN 110544789 A CN110544789 A CN 110544789A CN 201910816945 A CN201910816945 A CN 201910816945A CN 110544789 A CN110544789 A CN 110544789A
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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
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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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- 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
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Abstract
The invention relates to the technical field of battery preparation, and discloses a battery cell air-extracting and edge-sealing method and a battery cell air-extracting and edge-sealing device, wherein a battery cell comprises a battery cell body and an air bag connected with the battery cell body, and the battery cell air-extracting and edge-sealing method comprises the following steps: step S10, placing the battery cell in a manner of inclining the battery cell to the horizontal plane, and enabling the air bag to be positioned on the upper side of the battery cell body; step S20, forming an air extraction opening on the air bag, and extracting air from the battery cell through the air extraction opening; and step S30, after air exhaust is completed, sealing the cell edge. Electric core banding device (1) of bleeding includes can be right electric core spacing body, can set up shedding mechanism (16) of extraction opening and banding mechanism (18) to electric core banding on the air-bag, spacing body has can hold electric core body and have spacing cavity (10) of entry (100) that supply electric core body got into, and the central axis of spacing cavity is inclined to the horizontal plane. The battery cell prepared by the battery cell air-extracting edge-sealing method has high liquid retention capacity and good consistency of the liquid retention capacity.
Description
Technical Field
The invention relates to the technical field of battery preparation, in particular to a battery cell air-extracting and edge-sealing method and a battery cell air-extracting and edge-sealing device.
background
the cell refers to a single electrochemical cell containing a positive electrode and a negative electrode. Taking a polymer battery cell as an example, after the battery cell is formed, air extraction and sealing operations are required, all air in the battery cell and in the air bag is extracted, then, heat sealing is performed on the edge of the air bag, then, the excessive aluminum-plastic film subjected to heat sealing is cut off, and finally, subsequent operations such as resistance measurement are performed. In the operation of sealing of bleeding now for electric core level is placed, then punctures the gasbag of electric core and bleeds the banding, and like this, the guarantor volume uniformity of electric core is poor, the effect of bleeding is poor, and the banding pulling force is little.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the air exhaust effect is poor when an electric core is subjected to air exhaust and edge sealing, the liquid retention capacity of the electric core after air exhaust and edge sealing is poor, and the edge sealing pressure is low.
In order to achieve the above object, in one aspect, the present invention provides a method for air-extracting and edge-sealing a battery cell, where the battery cell includes a battery cell body and an airbag connected to the battery cell body, and the method includes:
Step S10, placing the battery cell in a manner of inclining to a horizontal plane, and enabling the air bag to be positioned on the upper side of the battery cell body;
Step S20, forming an air extraction opening on the airbag, and extracting air from the battery cell through the air extraction opening;
And step S30, after air exhaust is completed, sealing the battery cell.
In the technical scheme, the battery cell is arranged obliquely to the horizontal plane and then is exhausted, so that the exhausting effect can be improved, less electrolyte is exhausted, the liquid retention amount of the battery cell is guaranteed, meanwhile, the edge sealing tension is large, the structure of the battery cell is more stable, and substances in the battery cell are not prone to flowing out of a seal. In addition, after the battery is assembled by the battery cells obtained by the battery cell air-extracting edge-sealing method, the electrical cycle performance is greatly improved.
Preferably, in the step S10, an included angle formed between the battery cell and the horizontal plane is 45 ° to 135 °.
Preferably, in step S20, the battery cell is placed in a sealed space, the sealed space is vacuumized, and then the air bag is provided with the air extraction opening to extract air from the battery cell through the air extraction opening.
Preferably, the vacuum pumping is carried out, so that the pressure of the closed space is-100 KPa to-90 KPa.
Preferably, the time for vacuumizing the closed space is 30-180 s.
The invention provides a second aspect of a battery cell air-extracting and edge-sealing device, wherein a battery cell comprises a battery cell body and an air bag connected to the battery cell body, the battery cell air-extracting and edge-sealing device comprises a limiting body capable of limiting the battery cell, the limiting body is provided with a limiting cavity capable of accommodating the battery cell body, the limiting cavity is provided with an inlet for the battery cell body to enter, the central axis of the limiting cavity is inclined to the horizontal plane, the battery cell air-extracting and edge-sealing device further comprises an opening mechanism and an edge-sealing mechanism, and the opening mechanism comprises: the opening mechanism is arranged to be capable of arranging an air exhaust opening on the air bag, and the edge sealing mechanism is arranged to be capable of sealing edges of the battery cell.
In the technical scheme, the electric core can be placed in an inclined manner on the horizontal plane by arranging the limiting body and enabling the limiting body to be provided with the limiting cavity arranged in an inclined manner on the horizontal plane, so that after the air suction port is formed by utilizing the opening mechanism, the electric core can be sucked more quickly and better through the air suction port.
preferably, the stopper body includes a pair of stopper plates opposed to each other at a distance from each other, the pair of stopper plates defining the stopper chamber, and the pair of stopper plates being provided to be movable toward each other.
Preferably, electric core banding device of bleeding includes the evacuation cavity, the evacuation cavity has the evacuation chamber, the evacuation chamber has the confession the entry that electric core got into, spacing body with shedding mechanism all installs in the evacuation cavity, the via hole has been seted up on the evacuation cavity, electric core banding device of bleeding is including inserting and locating the via hole just can be connected with air exhaust equipment's exhaust tube.
Preferably, the vacuum-pumping cavity comprises a bottom cavity and a cover body covering the bottom cavity, and the bottom cavity and the cover body enclose to form the vacuum-pumping cavity.
Preferably, the edge sealing mechanism is installed in the vacuum pumping chamber, the opening mechanism and the edge sealing mechanism are both arranged above the limiting body, and the edge sealing mechanism is located between the limiting body and the opening mechanism; and/or
The vacuumizing cavity comprises a sealing piece which is arranged between the bottom cavity and the cover body and is used for sealing the joint of the bottom cavity and the cover body.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a cell air-extracting edge-sealing device according to a preferred embodiment of the present invention;
Fig. 2 is a normal distribution diagram of the liquid retention amounts of the battery cells 1 and 2;
Fig. 3 is a graph showing the electrical cycle performance test of the battery 1 and the battery 2.
description of the reference numerals
1-a cell air-extracting edge-sealing device; 10-a spacing chamber; 100-inlet; 12-a limiting plate; 13-a limiting plate cylinder; 14-vacuum pumping cavity; 140-an evacuation chamber; 142-a bottom chamber; 144-a cover; 146-a seal; 16-an opening mechanism; 160-bayonet; 162-bayonet cylinder; 18-a banding mechanism; 180-end enclosure; 182-head cylinder.
Detailed Description
In the present invention, the use of directional terms such as "upper, lower, left and right" generally means that the terms "inside and outside" refer to the inside and outside of the outline of the component in consideration of the orientation of the components in actual use and the drawings, unless otherwise specified.
The invention provides a cell air-extracting and edge-sealing method, wherein a cell comprises a cell body and an air bag connected with the cell body, and the cell body is communicated with the air bag, and the cell air-extracting and edge-sealing method comprises the following steps: step S10, placing the battery cell such as an aged battery cell in a manner of inclining to a horizontal plane, and positioning the airbag on the upper side of the battery cell body, where it can be understood that the battery cell is rectangular as a whole, and when the battery cell is placed in a manner of inclining to a horizontal plane, a preset included angle is formed between the whole battery cell and the horizontal plane, where the airbag is positioned on the upper side of the battery cell body, that is, above the airbag, and below the airbag; the cell air-extracting edge-sealing method further comprises the following steps: step S20, forming an air extraction opening on the airbag, and extracting air from the electrical core through the air extraction opening, where it is understood that, after the electrical core is placed in an inclined manner on a horizontal plane, the airbag may be formed with an air extraction opening by using a relevant tool, and for better air extraction, the airbag may be formed with a plurality of air extraction openings, so that the electrical core may be extracted through the air extraction opening, and in addition, in order to reduce the influence on the substances in the electrical core, the electrical core may be placed in a vacuum atmosphere to form the air extraction opening; and step S30, after air suction is finished, sealing edges of the battery cell, and sealing edges of the battery cell by using a heat sealing head to prevent substances in the battery cell from flowing out. Through will electric core incline to place in the horizontal plane after right electric core bleeds to can improve the effect of bleeding, and take less electrolyte out, guaranteed from this the guarantor's of electric core liquid retention volume, the banding pulling force is great simultaneously, makes the structure of electric core is more firm, the difficult follow of sealing of material in the electric core flows. In addition, after the battery is assembled by the battery cells obtained by the battery cell air-extracting edge-sealing method, the electrical cycle performance is greatly improved. It should be noted that gases are generated in the cell during both formation and aging processes, and therefore, the gases need to be extracted.
in order to better evacuate the battery cell, in step S10, an included angle formed by the battery cell and a horizontal plane may be 45 ° to 135 °, so that a liquid retention amount of the battery cell may be increased, preferably, an included angle formed by the battery cell and the horizontal plane may be 60 ° to 120 °, further preferably, an included angle formed by the battery cell and the horizontal plane may be 80 ° to 105 °, and more preferably, the battery cell may be placed perpendicular to the horizontal plane.
In addition, in the step S20, the battery cell is placed in a sealed space, the sealed space is vacuumized, and then the air bag is provided with the air extraction opening to extract air from the battery cell through the air extraction opening, it should be noted that before the battery cell is extracted through the air extraction opening, the battery cell may be placed in the sealed space, and then the sealed space is vacuumized to make the battery cell in a vacuum atmosphere, and then the air bag is provided with the air extraction opening, so that the gas in the battery cell can be extracted through the air extraction opening because the sealed space is continuously vacuumized.
in order to better and more quickly extract the gas in the battery cell, the pressure in the closed space can be maintained between-90 KPa and-100 KPa through vacuumizing, so that the gas in the battery cell can flow into the closed space more quickly, and meanwhile, the electrolyte in the battery cell can be maintained in the battery cell as much as possible, and the liquid retention capacity of the battery cell is improved.
In addition, the time for vacuumizing the closed space is 30-180 s, preferably 50-150 s, more preferably 70-120 s, and even more preferably 90-100 s. It should be noted that the time for evacuating refers to the total time for evacuating the enclosed space.
the invention also provides a battery core air-extracting and edge-sealing device, wherein a battery core comprises a battery core body and an air bag connected with the battery core body, as can be understood, the battery core body is communicated with the air bag, the battery core air-extracting and edge-sealing device 1 comprises a limiting body capable of limiting the battery core, the limiting body is provided with a limiting cavity 10 capable of accommodating the battery core body, the limiting cavity 10 is provided with an inlet 100 for the battery core body to enter, the air bag is preferably exposed outside the limiting cavity 10, the central axis of the limiting cavity 10 is inclined to the horizontal plane, and the limiting cavity 10 is inclined to the horizontal plane, so that the battery core placed in the limiting cavity 10 forms an included angle with the horizontal plane, the battery core air-extracting and edge-sealing device 1 further comprises an opening mechanism 16 and an edge: the opening mechanism 16 is set to be capable of opening an air exhaust port on the airbag, and the edge sealing mechanism 18 is set to be capable of sealing edges of the battery cell. Through setting up the spacing body and making the spacing body have the spacing cavity 10 that the slope set up in the horizontal plane to can make electric core slope place in the horizontal plane, utilize opening mechanism 16 to set up the extraction opening from this, carry out faster better bleeding through the extraction opening to electric core. It should be noted that the airbag may be exposed outside the limiting chamber 10, and the size of the exposed portion is not particularly limited as long as the opening mechanism 16 can open an air suction opening on the airbag, and the edge sealing mechanism 18 can seal the battery cell. That is, the exposed portion of the airbag may be subjected to the opening operation by the opening mechanism 16 and the sealing operation by the sealing mechanism 18. In addition, it should be noted that the opening mechanism 16 and the edge sealing mechanism 18 may be disposed above the confinement chamber 10, and the edge sealing mechanism 18 may be disposed between the opening mechanism 16 and the confinement chamber 10.
As shown in fig. 1, the stopper body may include a pair of stopper plates 12 spaced apart from each other and facing each other, the pair of stopper plates 12 may define a stopper chamber 10, it is understood that a gap is formed between the pair of stopper plates 12, the gap is formed as the stopper chamber 10, the pair of stopper plates 12 may be disposed to be movable toward each other, for example, a stopper plate cylinder 13 connected to the stopper plates 12 may be provided, and the stopper plates 12 may be driven to move by the driving of the stopper plate cylinder 13 to support and stop the stopper plates 12.
In order to maintain the electrolyte in the battery core as much as possible when the battery core is pumped, the battery core pumping edge sealing device 1 may include a vacuum pumping cavity 14, the vacuum pumping cavity 14 has a vacuum pumping chamber 140, and the vacuum pumping chamber 140 may be considered as a closed space, as shown in fig. 1, the vacuum pumping chamber 140 has an inlet for the battery core to enter, the position limiting body and the opening mechanism 16 may both be installed in the vacuum pumping cavity 14, in addition, a through hole may be formed in the vacuum pumping cavity 14, and the battery core edge sealing device 1 may include a pumping tube inserted into the through hole and capable of being connected to a pumping device, so that the vacuum pumping chamber 140 is pumped by the pumping device, i.e., a vacuum pump, thereby the gas in the battery core may be pumped through the pumping port and the electrolyte may not be easily pumped, the liquid retention capacity of the battery cell is improved. The length of the evacuation chamber 140 can be set according to actual requirements, so that a plurality of battery cells can be placed side by side.
as shown in FIG. 1, the vacuum pumping chamber body 14 may include a bottom cavity 142 and a cover body 144 covering the bottom cavity 142, and the bottom cavity 142 and the cover body 144 may enclose to form the vacuum pumping chamber 140. In this way, after the battery core is placed in the limiting cavity 10, the cover body 144 is covered on the bottom cavity 142, and then the evacuation chamber 140 can be evacuated through the evacuation tube. Wherein the top opening of the bottom cavity 142 is formed as an entrance for the cell. It should be noted that the limiting body may be disposed on the bottom wall of the bottom cavity 142, and the via hole may be disposed on the bottom cavity 142 or the cover body 144.
the edge sealing mechanism 18 may be installed within the evacuation chamber 140, both the opening mechanism 16 and the edge sealing mechanism 18 may be disposed above the stop body, and the edge sealing mechanism 18 may be located between the stop body and the opening mechanism 16. It can be understood that, after the battery cell is placed in the limiting chamber 10 and the evacuation chamber 140 is evacuated, the opening mechanism 16 can be used to open the evacuation port on the airbag, and the gas in the battery cell can be evacuated through the evacuation port under the continuous evacuation action. After the air exhaust is completed, the cell can be subjected to edge sealing by using an edge sealing mechanism 18. The opening mechanism 16 may include a pair of spaced apart bayonet knives 160, each bayonet knife 160 is connected to a bayonet cylinder 162, and when the air suction opening needs to be opened in the airbag, the bayonet knives 160 are driven by the corresponding bayonet cylinders 162 to move toward the airbag to puncture the airbag, thereby opening the air suction opening in the airbag. In addition, the edge sealing mechanism 18 may include a pair of end sockets 180 disposed at an interval, the pair of end sockets 180 may be opposite to each other, each end socket 180 is connected with an end socket cylinder 182, and when the cell is to be edge sealed, the end sockets 180 move toward the airbag under the driving action of the corresponding end socket cylinders 182 to perform the edge sealing operation.
In addition, as shown in FIG. 1, the vacuum pumping chamber body 14 may include a seal 146 disposed between the bottom cavity 142 and the cover body 144, wherein the seal 146 is used to seal the junction of the bottom cavity 142 and the cover body 144, thereby making the vacuum pumping chamber 140 more hermetically sealed.
It should be further noted that, after the edge sealing is completed, the evacuation chamber 140 is depressurized, the battery cell is taken out, and then the edge cutting is performed.
The effects of the present invention will be further described with reference to examples and comparative examples.
Examples
Preparing a battery cell, wherein the battery cell comprises a battery cell body and an air bag connected to the battery cell body, and when air extraction and edge sealing operation is performed on the battery cell, namely the aged battery cell, the battery cell body is subjected to limiting air extraction and edge sealing by using a battery cell air extraction and edge sealing device;
Wherein, electric core air extraction banding device 1 is as shown in figure 1: the vacuum pumping cavity comprises a bottom cavity 142 and a cover body 144 covering the bottom cavity 142, the bottom cavity 142 and the cover body 144 can be enclosed to form a vacuum pumping cavity 140, the limiting body, the opening mechanism 16 and the edge sealing mechanism 18 are all installed in the vacuum pumping cavity 14, the limiting body comprises a pair of limiting plates 12 which are mutually spaced and oppositely arranged, the limiting plates 12 are vertically installed on the bottom wall of the bottom cavity 142, the limiting chambers 10 are limited by the pair of limiting plates 12, the pair of limiting plates 12 can move towards each other, the edge sealing mechanism 18 is installed in the vacuum pumping cavity 140, the opening mechanism 16 and the edge sealing mechanism 18 are both arranged above the limiting body, the edge sealing mechanism 18 is located between the limiting body and the opening mechanism 16, a through hole is formed in the bottom cavity 142, and an exhaust pipe which can be connected with a; the opening mechanism 16 may include a pair of bayonet knives 160 spaced apart from each other, each bayonet knife 160 having a bayonet cylinder 162 connected thereto for driving the bayonet knife 160 toward the airbag; the sealing mechanism 18 may include a pair of sealing heads 180 spaced apart from each other, and each sealing head 180 is connected to a sealing head cylinder 182 capable of driving the sealing head 180 to move toward the airbag;
when the air exhaust and edge sealing operation is carried out:
Step S10, placing the battery cell in a limiting chamber 10, wherein the battery cell body is placed in the limiting chamber 10, the airbag is located on the upper side of the battery cell body, the distance between the pair of limiting plates 12 is adjusted to limit the battery cell, then, the cover body 144 is covered on the bottom cavity 142, and then, the vacuum pumping chamber 140 is vacuumized through the air pumping pipe, so that the pressure in the vacuum pumping chamber 140 is-100 KPa to-90 KPa;
step S20, driving the bayonet 160 to move towards the airbag under the driving action of the bayonet cylinder 162 to pierce the airbag, so as to form an air suction opening on the airbag, and sucking air from the battery cell through the air suction opening under the action of continuous vacuum pumping, wherein the air suction time is 100S;
Step S30, after the air suction is completed, under the driving action of the end socket air cylinder 182, the end socket 180 moves toward the air bag to seal the edge of the battery cell, thereby preparing the battery cell 1.
Comparative example
Comparative example 1
The method is the same as that in the embodiment 1, the cell is prepared, wherein the cell air-extracting and edge-sealing device 1 provided by the invention is not adopted, the cell is horizontally placed, then the opening is tied on the air bag, then the opening is directly connected with a vacuum pump through a pipe for air extraction, and the rest processes are unchanged, so that the cell 2 is prepared.
Test examples
Test example 1 test of the liquid retention amount of cell
Weighing the battery cell before air exhaust and edge sealing by using an electronic scale (with the precision of 0.1g), and weighing the battery cell after air exhaust and edge sealing (cutting off a battery cell airbag before weighing); the weight of the air bags is obtained by collecting the average value of the weight of the air bags of 100 electric cores as the weight of the air bag of each electric core;
Calculating the liquid retention of the battery cell by the following calculation formula: the liquid retention amount is the liquid injection amount (the weight of the battery cell before air extraction and edge sealing, the weight of the battery cell after air extraction and edge sealing and the weight of the airbag bag), wherein the liquid injection amount refers to the amount of the electrolyte injected into the battery cell;
The liquid retention capacity test is respectively carried out on the plurality of battery cells 1 and the plurality of battery cells 2 by adopting the test method, normal distribution diagrams of the liquid retention capacities of the battery cells 1 and the battery cells 2 are respectively drawn according to a plurality of groups of liquid retention capacity test results, the normal distribution diagrams of the liquid retention capacities of the battery cells 1 and the battery cells 2 are shown in fig. 2, the standard deviation of the liquid retention capacity of the battery cell 1 is 0.6577, the standard deviation of the liquid retention capacity of the battery cell 2 is 2.713, and therefore, the liquid retention capacity consistency of the battery cell 1 is good.
Test example 2 testing edge banding tension of cell
Measuring the edge seal of a cell with the width of 15mm and the length of 60mm by using a caliper and cutting the edge seal of the cell section to be used as a tensile test sample; and then, applying tension on the tension test sample by using a tension meter until the sample is completely pulled open or broken (the sample can be stopped after the tension is more than 160N), and recording the reading of the tension meter when the sample is pulled open or broken as the edge sealing tension.
the edge sealing tension test is respectively performed on the plurality of battery cells 1 and the plurality of battery cells 2 by the above method, and the test results are shown in table 1 below.
TABLE 1
As can be seen from the test results in table 1, the edge sealing tension of the cell 1 is greater than the edge sealing tension of the cell 2.
test example 3 electrical cycle performance test
assemble into battery 1 with electric core 1, assemble into battery 2 with electric core 2, carry out the electrical cycle performance test to battery 1 and battery 2 respectively:
1) testing the battery by using a battery testing system under the environment of room temperature (25 +/-2 ℃), relative humidity of 15-90% RH and atmospheric pressure of 86-106 kPa;
2) Discharging the battery to 2.75V at the rate of 1C;
3) Then, the battery is placed aside for 40 min;
4) then, constant-current charging is carried out at a current of 25A until the voltage reaches 4.15V, and the charging is stopped when the charging current is reduced to 0.05C;
5) Then, the battery is placed aside for 30 min;
6) the cell was discharged to 2.75V at 100A while recording the discharge capacity;
Continuously cycling for 1000 times according to the steps 3) to 6), and terminating the experiment if the discharge capacity is less than 80% of the initial capacity; in addition, the number of cycles may characterize the cycle life.
The results of the electrical cycle performance tests of batteries 1 and 2 are shown in fig. 3, and it can be seen from fig. 3 that the cycle number of battery 1 is 1121, the cycle number of battery 2 is 841, and the cycle number of battery 1 is 33.3% higher than that of battery 2, and thus, the electrical cycle performance of battery 1 is better.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (10)
1. The cell air-extracting and edge-sealing method is characterized in that a cell comprises a cell body and an air bag connected to the cell body, and the cell air-extracting and edge-sealing method comprises the following steps:
step S10, placing the battery cell in a manner of inclining to a horizontal plane, and enabling the air bag to be positioned on the upper side of the battery cell body;
Step S20, forming an air extraction opening on the airbag, and extracting air from the battery cell through the air extraction opening;
and step S30, after air exhaust is completed, sealing the battery cell.
2. The cell air-extraction edge sealing method of claim 1, wherein in the step S10, the included angle between the cell and the horizontal plane is 45 ° to 135 °.
3. The cell air-extracting edge-sealing method of claim 1, wherein in step S20, the cell is placed in a sealed space, the sealed space is evacuated, and then the air bag is provided with the air-extracting opening to extract air from the cell through the air-extracting opening.
4. the cell air-extracting edge-sealing method of claim 3, wherein the pressure of the closed space is between-100 KPa and-90 KPa by vacuumizing.
5. The cell air-extraction edge-sealing method according to claim 4, wherein the time for vacuumizing the closed space is 30-180 s.
6. The utility model provides an electricity core banding device of bleeding, its characterized in that, electricity core include the electricity core body with connect in the gasbag of electricity core body, electricity core banding device of bleeding (1) is including can be right the spacing body of electricity core, spacing body has can hold spacing cavity (10) of electricity core body, spacing cavity (10) have the confession entry (100) that electricity core body got into, the central axis of spacing cavity (10) is inclined to the horizontal plane, electricity core banding device of bleeding (1) still includes shedding mechanism (16) and banding mechanism (18), wherein: the opening mechanism (16) is arranged to be capable of forming an air exhaust opening on the airbag, and the edge sealing mechanism (18) is arranged to be capable of sealing edges of the battery cell.
7. The cell extraction edge sealing device according to claim 6, wherein the limiting body comprises a pair of limiting plates (12) which are spaced apart from each other and opposite to each other, the pair of limiting plates (12) defines the limiting chamber (10), and the pair of limiting plates (12) is arranged to be movable towards each other.
8. The cell air-extracting edge-sealing device of claim 6, wherein the cell air-extracting edge-sealing device (1) comprises an air-extracting cavity (14), the air-extracting cavity (14) is provided with an air-extracting chamber (140), the air-extracting chamber (140) is provided with an inlet for the cell to enter, the limiting body and the opening mechanism (16) are both installed in the air-extracting cavity (14), a via hole is formed in the air-extracting cavity (14), and the cell air-extracting edge-sealing device (1) comprises an air-extracting pipe which is inserted into the via hole and can be connected with air-extracting equipment.
9. the cell air-extracting edge-sealing device of claim 8, wherein the evacuated cavity (14) comprises a bottom cavity (142) and a cover body (144) covering the bottom cavity (142), and the bottom cavity (142) and the cover body (144) enclose to form the evacuated cavity (140).
10. The cell extraction edge sealing device according to claim 9, wherein the edge sealing mechanism (18) is installed in the evacuation chamber (140), the opening mechanism (16) and the edge sealing mechanism (18) are both disposed above the position limiting body, and the edge sealing mechanism (18) is located between the position limiting body and the opening mechanism (16); and/or
The evacuated cavity (14) includes a seal (146) disposed between the bottom cavity (142) and the cover (144) for sealing the junction of the bottom cavity (142) and the cover (144).
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| CN106602122A (en) * | 2016-12-21 | 2017-04-26 | 惠州金源精密自动化设备有限公司 | Vertical type air exhaust packaging device for soft package battery |
| CN106784971A (en) * | 2016-12-21 | 2017-05-31 | 惠州金源精密自动化设备有限公司 | A kind of soft-package battery is evacuated packaging machine |
| CN208240805U (en) * | 2018-04-02 | 2018-12-14 | 深圳市海目星激光智能装备股份有限公司 | A kind of pumping sealing machine of soft-package battery |
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