CN217544841U - Gas guiding device, gas guiding system and soft package battery - Google Patents
Gas guiding device, gas guiding system and soft package battery Download PDFInfo
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- CN217544841U CN217544841U CN202123106044.7U CN202123106044U CN217544841U CN 217544841 U CN217544841 U CN 217544841U CN 202123106044 U CN202123106044 U CN 202123106044U CN 217544841 U CN217544841 U CN 217544841U
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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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Abstract
The utility model relates to the field of lithium batteries, in particular to a gas leading-out device, a gas leading-out system and a soft package battery; the gas leading-out device comprises a gas guide tube and a gas one-way valve arranged at one end of the gas guide tube, the gas guide tube comprises a tube body and a heat sealing layer, and the heat sealing layer is arranged outside the tube body; the utility model discloses a design a gaseous guiding device, in time with the lithium cell in the formation process produced gas through the air duct discharge, need not to save more gas through increasing the air pocket length, can make the battery air pocket no longer bulge, make electric core main part face more level and more smooth after the hot pressing, not only effectively improved the battery encapsulation quality, still make manufacturing cost greatly reduced; moreover, on the basis of the existing process flow and production equipment, the method can be simply realized without great modification, and the production cost is further reduced.
Description
Technical Field
The utility model relates to a lithium cell field, concretely relates to gaseous eduction gear, gaseous derivation system and laminate polymer battery.
Background
According to the traditional lithium ion battery production process, generated gas is stored and formed through the air bag, the capacity of the air bag is limited under the condition that a large amount of gas is generated, the gas cannot be completely removed, and the forming clamp can be jacked up to influence the forming effect of the battery cell clamp.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a gaseous guiding device, gaseous derivation system and laminate polymer battery, it is limited to have overcome air pocket capacity among the prior art, and gaseous can't get rid of completely, can jack-up become the defect that anchor clamps influence electric core anchor clamps and become the effect.
The utility model provides a technical scheme that its technical problem adopted is: a gas leading-out device is provided for leading out gas in a battery gas bag, and the preferable scheme is as follows: the gas guiding device comprises a gas guide tube and a gas one-way valve arranged at one end of the gas guide tube, the gas guide tube comprises a tube body and a heat sealing layer, and the heat sealing layer is arranged outside the tube body.
Wherein, the preferred scheme is as follows: the heat sealing layer is a PP layer or a PE layer.
Wherein, the preferred scheme is as follows: the pipe body is a metal pipe.
Wherein, the preferred scheme is: the pipe body comprises a plurality of sections of metal pipes which are arranged at intervals, and the plurality of sections of metal pipes are all fixedly arranged inside the heat sealing layer.
Wherein, the preferred scheme is as follows: the air duct also comprises an insulating layer, and the insulating layer is arranged inside the duct body.
Wherein, the preferred scheme is: the insulating layer is a nylon layer.
Wherein, the preferred scheme is: the insulating layer is a polytetrafluoroethylene layer.
For solving the problem that prior art exists, the utility model discloses still provide a gaseous derivation system, its preferred scheme lies in: the gas leading-out system comprises the gas leading-out device, and the gas collecting device detachably connected to the gas leading-out device.
For solving the problem that prior art exists, the utility model also provides a laminate polymer battery, its preferred scheme lies in: laminate polymer battery includes as above gaseous eduction gear, laminate polymer battery still includes electric core portion and gas bag portion, electric core portion with the inside intercommunication of gas bag portion, gaseous eduction gear with gas bag portion connects, and makes gaseous check valve orientation the gas bag portion outside.
Wherein, the preferred scheme is: the electric core part is arranged below the air bag part, and the gas guiding device is connected with the upper edge of the air bag part.
The utility model has the advantages that compared with the prior art, the utility model designs a gas guiding device, which can discharge the gas generated in the formation process of the lithium battery in time through the gas guide tube, and can prevent the gas bag of the battery from bulging without increasing the length of the gas bag to store more gas, so that the main body surface of the battery core is more flat after hot pressing, thereby not only effectively improving the packaging quality of the battery, but also greatly reducing the production cost; and on the basis of the existing process flow and production equipment, the method can be simply realized without great modification, and the production cost is further reduced.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of a gas leading-out device in the present invention;
FIG. 2 is a schematic view of the structure of the airway tube of the present invention;
fig. 3 is a schematic structural diagram of a gas discharge system according to the present invention;
fig. 4 is a first schematic structural diagram of a pouch battery in the present invention;
FIG. 5 is a view of one embodiment of the present invention and the structure schematic diagram of the soft package battery II.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the present invention provides a preferred embodiment of a gas leading-out device.
A gas guiding device is used for guiding out gas in a battery gas bag, and referring to fig. 1 and fig. 2, the gas guiding device comprises a gas guiding tube 11 and a gas one-way valve 12 arranged at one end of the gas guiding tube 11, the gas guiding tube 11 comprises a tube body 112 and a heat sealing layer 111, and the heat sealing layer 111 is arranged outside the tube body 112.
Specifically, referring to fig. 1 and fig. 2, the gas guiding device is mainly used for discharging gas generated during the formation process of the lithium battery; when the lithium battery is placed on the formation jig and is thermally pressed, gas generated inside the lithium battery due to the formation can be discharged outside through the gas guide tube 11. The gas leading-out device is also provided with a gas one-way valve 12, the gas one-way valve 12 is arranged at one end of the gas guide tube 11, and the gas one-way valve 12 is mainly applied to the occasions where the gas flow is not allowed to flow reversely, and in the embodiment, the purpose is to prevent external gas from entering the lithium battery through the gas guide tube 11.
Further, referring to fig. 1 and 2, the airway tube 11 includes a tube 112 and a heat sealing layer 111, the tube 112 mainly plays a supporting role, the heat sealing layer 111 is disposed outside the tube 112, and the heat sealing layer 111 can be heat-sealed, in this embodiment, it is intended to be fused and sealed together with the inner aluminum plastic film layer of the external battery airbag after being heated. On the one hand, external gas can be prevented from entering the lithium battery, on the other hand, internal gas of the lithium battery can be prevented from being discharged to the air, and environmental pollution and human harm are avoided.
It should be noted that the heat-sealing layer 111 is disposed outside the tube 112, and the heat-sealing layer 111 may wrap the gas check valve 12 or may not wrap the gas check valve 12, as long as it is ensured that the gas check valve 12 is airtight after being connected with the tube 112.
Further, the heat sealing layer 111 is a PP layer or a PE layer.
Specifically, the PP layer mainly refers to polypropylene, which is a polymer obtained by addition polymerization of propylene. Mainly white wax-like material, transparent and light in appearance. The polypropylene is inflammable and softened at about 155 ℃, can resist the corrosion of acid, alkali, salt solution and various organic solvents at the temperature below 80 ℃, and can be decomposed at high temperature and under the action of oxidation. The PP layer can be fused and sealed with the inner layer of the aluminum plastic film of the external battery air bag at high temperature.
The PE layer is mainly polyethylene, which is a thermoplastic resin obtained by polymerizing ethylene. In industry, copolymers of ethylene with small amounts of alpha-olefins are also included. The polyethylene is odorless, nontoxic, has wax-like hand feeling, has excellent low-temperature resistance, has the lowest use temperature of-100 to-70 ℃, has good chemical stability, and can resist the corrosion of most of acid and alkali. The PE layer can be fused and sealed with the inner layer of the aluminum plastic film of the external battery air bag at high temperature.
Further, and referring to fig. 1 and 2, the tube body 112 is a metal tube.
Specifically, the metal pipe is mainly used for supporting and providing a guide channel for gas generated in the lithium battery formation process.
Further, and referring to fig. 1 and 2, the airway tube 11 further includes an insulating layer 113, and the insulating layer 113 is disposed inside the tube 112.
Specifically, the insulating layer 113 is mainly used for fixing the tube and directly contacting with the generated gas, and may be made of a material that is not deformed by heat or bonded, specifically, may be selected according to actual conditions or cost budget, and provides two schemes in this embodiment.
Scheme one
The insulating layer 113 is a nylon layer.
Specifically, the nylon layer is of a polyamide structure, the polyamide is mainly used for synthetic fibers, the most prominent advantage is that the wear resistance is higher than that of all other fibers, and the polyamide has the characteristics of light weight, good crease resistance and good durability. Be applicable to preparation wear-resisting part or transmission structure spare, in this embodiment, can prevent effectively that air duct 11 from being heated deformation or bonding through setting up the nylon layer.
Before the formation process of the lithium battery, winding, punching and packaging are carried out according to a normal production flow; after the lithium battery is packaged, the procedures of pressing the angle, measuring hi-pot, sticking a PET film and baking for liquid injection are carried out according to the normal production process.
When the lithium battery is pre-sealed after liquid injection, the gas guide tube 11 with the gas one-way valve 12 is placed at a position 5mm away from the gas bag opening of the battery, and the distance can be set selectively according to actual conditions; and keep the check valve outside towards the battery gas bag mouth, furtherly, use the heat-seal machine to carry out the heat-seal and seal, guarantee not to have the gap and make electrolyte leak out.
When the lithium battery is pre-sealed, the lithium battery is kept stand, namely, the lithium battery is kept stand for 1 day at normal temperature and is kept stand for 1 day at the high temperature of 45 ℃.
When the lithium battery is subjected to clamp formation, the battery cell is placed on the special forming clamping plate, and the gas one-way valve 12 is kept upward to prevent the electrolyte from blocking the one-way valve.
After the lithium battery is formed by the clamp, the battery is subjected to secondary sealing operation, an air bag is cut off, and subsequent capacity grading and aging processes are carried out according to a normal flow.
This solution is suitable for the case where the airway tube 11 is provided as a disposable consumable.
Scheme two
The insulating layer 113 is a teflon layer. The tube body 112 includes a plurality of metal tubes arranged at intervals, and the plurality of metal tubes are all fixedly arranged inside the heat seal layer 111.
Specifically, polytetrafluoroethylene is a high molecular polymer prepared by polymerization using tetrafluoroethylene as a monomer. The polytetrafluoroethylene is white wax, semitransparent, heat-resistant and cold-resistant, and can be used for a long time at-180-2602C. Polytetrafluoroethylene has the characteristics of acid resistance, alkali resistance and resistance to various organic solvents, and is almost insoluble in all solvents. Meanwhile, the polytetrafluoroethylene has the characteristic of high temperature resistance, the friction coefficient of the polytetrafluoroethylene is extremely low, the polytetrafluoroethylene can be used for lubrication, and becomes an ideal coating for easily cleaning the inner layer of the water pipe.
Further, the tube body 112 includes a plurality of discontinuous metal tubes for supporting, and the plurality of metal tubes all play a supporting and shaping role to ensure the opening of the catheter; the pitch of the metal pipes of the pipe body 112 is set according to specific conditions, the connecting parts are arranged among the metal pipes of the pipe body 112, and the pipe body 112 with a plurality of sections of discontinuous metal pipes is provided, so that the air guide pipe 11 has good flexibility and can be repeatedly used in a mode of cutting the connecting parts after each use.
Before the formation process of the lithium battery, winding, punching and packaging are carried out according to a normal production flow; and after the lithium battery is packaged, carrying out the working procedures of pressing an angle position, measuring hi-pot, sticking a PET film and baking and injecting liquid according to a normal production process.
When the lithium battery is pre-sealed after liquid injection, the air duct 11 with the gas one-way valve 12 is placed in a 5mm position of an air bag opening of the battery, and the distance can be set selectively according to actual conditions; and keep the check valve outside towards battery gas sack, further, use the heat-seal machine to carry out the heat-seal and seal, guarantee not to have the gap and make electrolyte leak out.
When the lithium battery is pre-sealed, the lithium battery is kept stand, namely, the lithium battery is kept stand for 1 day at normal temperature and is kept stand for 1 day at the high temperature of 45 ℃.
When the lithium battery is subjected to clamp formation, the battery cell is placed on the special forming clamping plate, and the gas one-way valve 12 is kept upward to prevent the electrolyte from blocking the one-way valve.
After the lithium battery is formed by the clamp, performing secondary sealing operation on the battery, cutting off the air bag, recovering the air duct 11, shearing the air duct 11 along the connecting part at the next section of metal pipe, and ultrasonically cleaning the remaining air duct 11 by alcohol for reuse; and subsequent volume grading and aging processes are carried out according to a normal flow.
This solution is suitable for the case where the airway tube 11 is designed to be recyclable and reusable.
In the traditional lithium ion battery production process, the generated gas is stored and formed through the air bag, but under the condition of generating a large amount of gas, the capacity of the air bag is limited, the gas cannot be completely removed, and the forming clamp can be jacked up to influence the forming effect of the battery cell clamp. If the gas capacity of the gas bag is increased by increasing the size of the gas bag, on one hand, the using amount of the aluminum plastic film material is increased, and on the other hand, the top seal length is longer, so that the packaging error rate is high, and the packaging quality of the lithium battery is influenced.
In the embodiment, the gas guiding device is adopted to timely discharge gas generated in the formation process of the lithium battery through the gas guide tube 11, so that the gas bag of the battery does not bulge any more without increasing the length of the gas bag to store more gas, and the main body surface of the battery core is smoother after hot pressing, thereby improving the deformation degree of the battery core, effectively improving the packaging quality of the battery, and greatly reducing the production cost; and on the basis of the existing process flow and production equipment, the method can be simply realized without great modification, and the production cost is further reduced.
As shown in fig. 3, the utility model also provides a gaseous derivation system.
A gas export system, referring to fig. 3, comprising a gas export apparatus 1 as described above, and further comprising a gas collection apparatus 2 detachably connected to the gas export apparatus 1.
When the lithium battery is subjected to clamp formation, the gas collecting device 2 is connected with an opening of a gas one-way valve 12 of the gas guiding device 1, a battery cell is placed on a special forming clamp plate, and the gas one-way valve 12 is kept upward to prevent electrolyte from blocking the one-way valve; further, the gas collecting device 2 is opened, and the vacuum degree is adjusted to-30 kPa, so that gas generated during formation is prevented from overflowing from the gas collecting device 2 and causing harm to people.
As shown in fig. 4 and 5, the utility model also provides a laminate polymer battery.
The utility model provides a laminate polymer battery, refer to fig. 4, laminate polymer battery includes gaseous eduction gear 1 as above, laminate polymer battery still includes electric core portion 31 and gas bag portion 32, electric core portion 31 with the inside intercommunication of gas bag portion 32, gaseous eduction gear with gas bag portion 32 is connected, and makes gaseous check valve 12 orientation the gas bag portion 32 outside.
Specifically, the gas bag portion 32 is mainly used for storing gas generated in the formation process of the battery, so as to prevent the cell from deforming due to the influence of pressure on the formation fixture. The gas discharge means is connected to a side of the bag portion 32 such that the gas check valve 12 faces the outside of the bag portion 32 to discharge the gas in the bag portion 32. By communicating the inside of the air bag portion 32 with the inside of the battery core portion 31, the generated gas can enter the inside of the air bag portion 32 from the inside of the battery core portion 31 and be stored during the formation process of the lithium battery. Through with gaseous guiding device with gas bag portion 32 is connected, can derive through gaseous guiding device after gaseous income gas bag portion 32, so, realized the gaseous timely discharge in electric core portion 31, it is right the capacity demand of gas bag portion 32 also will reduce, so also can corresponding reduction to the demand of air bag length, not only save the plastic-aluminum membrane material, still make the top seal length reduce to reduce encapsulation dislocation probability, effectively improved the encapsulation quality of lithium cell.
Further, and referring to fig. 5, the electric core portion 31 is disposed below the air pocket portion 32, and the gas lead-out means is connected to an upper edge of the air pocket portion 32.
Specifically, referring to fig. 5, by disposing the electric core portion 31 below the air bag portion 32 and connecting the gas leading-out device 1 to the upper edge of the air bag portion 32, the gas leading-out device 1 is disposed on the side of the air bag portion 32 away from the electric core portion 31, so that the electrolyte in the electric core portion 31 can be effectively prevented from flowing into the gas leading-out device 1, the electrolyte can be effectively prevented from blocking the gas check valve 12, and the stability of gas leading-out can be improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, which is intended to cover all equivalent changes and modifications made within the scope of the present invention.
Claims (10)
1. A gas guiding device is used for guiding out gas in a battery gas bag, and is characterized in that: the gas guiding device comprises a gas guide tube and a gas one-way valve arranged at one end of the gas guide tube, the gas guide tube comprises a tube body and a heat sealing layer, and the heat sealing layer is arranged outside the tube body.
2. The gas leading-out device according to claim 1, wherein: the heat sealing layer is a PP layer or a PE layer.
3. The gas leading-out device according to claim 1, wherein: the pipe body is a metal pipe.
4. The gas leading-out device according to claim 1, wherein: the pipe body comprises a plurality of sections of metal pipes which are arranged at intervals, and the plurality of sections of metal pipes are all fixedly arranged inside the heat sealing layer.
5. The gas leading-out device according to claim 1, wherein: the air duct also comprises an insulating layer, and the insulating layer is arranged inside the duct body.
6. The gas leading-out device according to claim 5, wherein: the insulating layer is a nylon layer.
7. The gas leading-out device according to claim 5, wherein: the insulating layer is a polytetrafluoroethylene layer.
8. A gas export system, characterized by: the gas export system comprises a gas export apparatus as claimed in any of claims 1 to 7, and further comprises a gas collection apparatus removably connected to the gas export apparatus.
9. The utility model provides a laminate polymer battery which characterized in that: the soft package battery comprises the gas leading-out device as claimed in any one of claims 1 to 7, and further comprises a battery core part and a gas bag part, wherein the battery core part is communicated with the inside of the gas bag part, and the gas leading-out device is connected with the gas bag part and enables the gas one-way valve to face to the outside of the gas bag part.
10. The pouch cell according to claim 9, wherein: the electric core part is arranged below the air bag part, and the gas guiding device is connected with the upper edge of the air bag part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123106044.7U CN217544841U (en) | 2021-12-07 | 2021-12-07 | Gas guiding device, gas guiding system and soft package battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123106044.7U CN217544841U (en) | 2021-12-07 | 2021-12-07 | Gas guiding device, gas guiding system and soft package battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217544841U true CN217544841U (en) | 2022-10-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123106044.7U Active CN217544841U (en) | 2021-12-07 | 2021-12-07 | Gas guiding device, gas guiding system and soft package battery |
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|---|---|
| CN (1) | CN217544841U (en) |
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2021
- 2021-12-07 CN CN202123106044.7U patent/CN217544841U/en active Active
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