CN211150708U - Top sealing device of soft package lithium battery - Google Patents
Top sealing device of soft package lithium battery Download PDFInfo
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- CN211150708U CN211150708U CN202020033055.3U CN202020033055U CN211150708U CN 211150708 U CN211150708 U CN 211150708U CN 202020033055 U CN202020033055 U CN 202020033055U CN 211150708 U CN211150708 U CN 211150708U
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- heating piece
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- lug
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- point ear
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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
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Abstract
The utility model provides a top sealing device of a soft package lithium battery, which comprises 2 head sealing mechanisms with the same structure and a flattening piece, wherein the head sealing mechanisms are arranged oppositely, and the flattening piece is positioned at one side of the head sealing mechanisms; head mechanism include heat-generating body, head, utmost point ear auxiliary heating piece, heating piece install spring, heating piece guide post additional, the head be fixed in one side of heat-generating body, utmost point ear auxiliary heating piece pass through heating piece guide post with the heat-generating body link to each other, the heating piece install the spring housing additional in the outside of heating piece guide post to be located between heat-generating body and the utmost point ear auxiliary heating piece, head and utmost point ear auxiliary heating piece all be located the homonymy of heat-generating body, the head be located flattening and utmost point ear auxiliary heating piece between. Soft packet of lithium cell's top sealing device be provided with the utmost point ear auxiliary heating piece that adds the heating piece guide post and install the spring additional.
Description
Technical Field
The utility model belongs to the laminate polymer battery field especially relates to a top sealing device of laminate polymer lithium cell.
Background
Due to flexibility in shape and size, the soft package lithium ion battery can meet the requirement of higher energy density so as to adapt to the development of the lithium ion battery towards the directions of thinner, smaller and high energy density. But also puts higher requirements on the packaging process of the soft package lithium ion battery, the performance of the packaging material and the structural design of the end enclosure. The packaging of the pouch battery is generally classified into a top seal, a side seal and a final vacuum package. The top sealing packaging process is very complex, because the positive electrode lug and the negative electrode lug are led out of the battery from the inside of the battery during top sealing, the bonding and good sealing of the PP layer of the aluminum plastic film at the lug position and the PP layer of the lug glue are ensured, the bonding and good sealing of the PP layers of the two aluminum plastic films at the glue dissolving position are also ensured, and meanwhile, the aluminum plastic films and the lug glue cannot be over-melted. The seal head structure is designed, two corresponding grooves are milled at the positions corresponding to the battery tabs on the upper and lower top seal heads with fixed width according to the width and the thickness of the tabs, and therefore the influence on the packaging effect due to different tab thicknesses is avoided. In addition, the thickness limit is added at the two ends of the upper end socket and the lower end socket so as to achieve the optimal packaging thickness and avoid the excessive pressure of the seal. However, when the battery is sealed and packaged, the positive electrode tab (Al tab) and the negative electrode tab (Ni tab) absorb a large amount of heat, which easily causes poor sol at the tab position. In order to achieve a better packaging effect, most of the existing designs of the top seal heads can design a tab auxiliary heating block at the tab positions of the upper and lower seal heads so as to compensate the heat taken away by the tabs. The structural design that present utmost point ear auxiliary heating piece and upper and lower head are as an organic whole, and the apical sealing process has the pressure to hinder utmost point ear risk, distinguishes the aluminium-plastic film zone of heating and the respective double-end-socket design of upper and lower head of utmost point ear auxiliary heating of correspondence of the utmost point ear zone of heating, is difficult to guarantee utmost point ear auxiliary heating to the validity of the heat compensation of aluminium-plastic film encapsulation to can not effectively reach the thermal purpose of compensation utmost point ear, and the head structural design is complicated moreover. The simple transverse lug auxiliary heating block cannot meet the heat compensation during the top sealing of the long-lug battery. And the limit design of the metal band without the electrode lugs on the auxiliary heating block can not avoid the phenomenon of poor exposed size of the electrode lug glue caused by factors such as air pressure fluctuation in the top sealing process. The top seal head is a fixed width head and easily causes top seal leakage at the tab sol position, and the risk of damaging the aluminum plastic film by the tab is also generated during battery transportation. In addition, fixed electric core frock generally only carries on spacingly to electric core body and gasbag, does not have the flattening device at the top of the sealing process plastic-aluminum membrane top banding, leads to sealing connectivity fold of top easily.
The conventional auxiliary heating block for the lug of the top sealing head is designed by integrating an aluminum plastic film heating zone and an auxiliary heating zone for the lug on an upper sealing head and a lower sealing head, the lug compensation heat and the heat sealing temperature cannot be independently controlled, the thickness stability of sealing sol is difficult to guarantee, the lug heating block is designed by being immovable and limiting a metal belt of the lug, and the lug is crushed in the top sealing process, so that the risk of poor exposure of the lug glue of the top sealing head is caused; the top sealing head lug auxiliary heating block is a mode that an aluminum plastic film heating area and a lug auxiliary heating area are respectively designed into an upper sealing head and a lower sealing head, so that the effectiveness of the auxiliary lug heating on the packaging heat compensation of the aluminum plastic film heating is difficult to ensure, a good packaging effect is difficult to achieve, and the structural design of the sealing head is complex; the auxiliary heating block for the lug of the top sealing end socket is a simple transverse heating block, and sufficient heat compensation is difficult to meet when the battery with a long lug is sealed, so that good packaging effect of the lug position is difficult to ensure; the fixed battery core tool only limits the battery core body and the air bag, and the top edge sealing of the aluminum plastic film is not provided with a flattening device in the top sealing process, so that penetrating wrinkles of the top sealing seal are easily caused; the top seal head is a fixed-width head, and the battery top seal with a direct-welding structure aiming at the lugs at two ends has the risk of causing leakage of the top seal and damage to the aluminum-plastic film due to the deflection of the corner position of the lug in the battery transferring process.
Disclosure of Invention
In view of this, the utility model aims at providing a soft packet of lithium cell's top sealing device has satisfied the heat compensation requirement that long utmost point ear battery top sealed, has guaranteed the encapsulation effect of utmost point ear position.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the top sealing device of the soft package lithium battery comprises 2 head sealing mechanisms and flattening pieces, wherein the head sealing mechanisms are identical in structure, the head sealing mechanisms are arranged oppositely, and the flattening pieces are positioned on one side of the head sealing mechanisms;
head mechanism include heat-generating body, head, utmost point ear auxiliary heating piece, heating piece install spring, heating piece guide post additional, the head be fixed in one side of heat-generating body, utmost point ear auxiliary heating piece pass through heating piece guide post with the heat-generating body link to each other, the heating piece install the spring housing additional in the outside of heating piece guide post to be located between heat-generating body and the utmost point ear auxiliary heating piece, head and utmost point ear auxiliary heating piece all be located the homonymy of heat-generating body, the head be located flattening and utmost point ear auxiliary heating piece between.
Furthermore, utmost point ear auxiliary heating piece be L type structure, the straight portion's of utmost point ear auxiliary heating piece top with heating piece guide post swing joint, the bottom overhang of utmost point ear auxiliary heating piece be located with the head relative one side.
Further, the head transversely set up, the top of head with the heat-generating body link to each other, the bottom is provided with utmost point ear position encapsulation recess, 2 utmost point ear sol position encapsulation lugs, utmost point ear position encapsulation recess be located utmost point ear sol position encapsulation lug between.
Furthermore, the lug position packaging grooves of the 2 head sealing mechanisms correspond to each other.
Furthermore, the end socket is provided with a limit groove with the width the same as that of the lug position packaging groove, the surface of the limit groove is adjacent to the surface of the lug position packaging groove, and the limit groove is communicated with the lug position packaging groove.
Furthermore, the flattening piece is of a T-shaped structure. The flattening piece is connected with one end of the fixed battery tool in a movable folding and disassembling mode.
Furthermore, a metal belt limiting groove is formed in the auxiliary lug heating block.
Compared with the prior art, soft packet of lithium cell's top sealing device have following advantage:
(1) soft packet of lithium cell's top sealing device with utmost point ear auxiliary heating piece and the components of a whole that can function independently of top sealing head, design side by side, guarantee the simultaneity of the two action and temperature control's independence, guarantee good utmost point ear position top and seal the encapsulation effect, be convenient for popularize and apply in large-scale production.
(2) The utility model discloses a soft packet of lithium cell's top sealing device be provided with the utmost point ear auxiliary heating piece of heating piece guide post and additional spring, can with utmost point ear moderate degree contact in the packaging process, both avoided utmost point ear crushing, the in close contact with of heating piece and utmost point ear has been guaranteed again, the heat that the positive negative pole ear of effective compensation packaging process was taken away, L type utmost point ear auxiliary heating piece, the heat compensation requirement of long utmost point ear battery top seal encapsulation has been satisfied, the encapsulation effect of utmost point ear position has been guaranteed, utmost point ear auxiliary heating piece sets up utmost point strap spacing groove, reduce utmost point ear glue and expose the size bad risk, gradient width top seal head structure increases sol position seal width, reduce the top seal weeping risk, the T type piece that flattens is used for flattening aluminium-plastic membrane top banding when the top seal, prevent top seal fold.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic view of a top sealing device of a soft package lithium battery according to an embodiment of the present invention;
fig. 2 is a schematic view of the sealing head according to the embodiment of the present invention.
Description of reference numerals:
1-a heating element; 2-sealing the end; 3-auxiliary heating block of pole ear; 4-the heating block is provided with a spring; 5-heating block guide post; 6-a metal band limiting groove; 7-encapsulating the lug by using the lug sol position; 8-packaging the lug position in a groove; 9-flattening piece; 10-a head sealing mechanism; 11-a limit groove.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-2, a top sealing device 2 of a soft package lithium battery comprises 2 end enclosure 2 mechanisms with the same structure and a flattening piece 9, wherein the end enclosure 2 mechanisms are arranged oppositely, and the flattening piece 9 is positioned on one side of the end enclosure 2 mechanism;
The heating body 1 is used as a heating source of the end socket 2 and the lug auxiliary heating block 3. The lug auxiliary heating block 3 is used for compensating heat taken away by the positive and negative lugs in the top sealing and packaging process, and particularly, the lug auxiliary heating block 3 meets the requirement of heat compensation of battery long lug packaging so as to ensure the sol effect of the lug position. The power that adds the bullet is the power that utmost point ear auxiliary heating piece 3 acts on utmost point ear promptly to add the power of loading, has avoided the encapsulation in-process to press wounded utmost point ear, thereby perhaps adds the heat that the positive and negative pole ear was taken away can not effectively compensated with utmost point ear contact well to the heating piece, causes the risk that utmost point ear position sol effect is poor. The heating block guide post 5 is used for guiding the tab heating block up and down in the packaging process of the tab auxiliary heating block 3, so that the misdirection of the heating block is avoided. The metal belt limiting groove 6 is formed in the lug auxiliary heating block 3, and unqualified exposed sizes of lug glue in the packaging process are avoided.
The auxiliary heating block 3 for the lug is of an L-type structure, the top of the vertical part of the auxiliary heating block 3 for the lug is movably connected with the heating block guide post 5, the protruding end of the bottom of the auxiliary heating block 3 for the lug is positioned on one side opposite to the seal head 2, the top of the vertical part of the auxiliary heating block 3 for the lug is provided with a deep groove matched with the heating block guide post 5, the heating block guide post 5 is stressed in the using process, one end of the heating block guide post is deeply inserted into the deep groove, the length of the heating block guide post 5 exposed outside is reduced, and the spring is compressed and stressed.
The end socket 2 is transversely arranged, the top of the end socket 2 is connected with the heating body 1, the bottom of the end socket is provided with a lug position packaging groove 8 and 2 lug sol position packaging lugs 7, and the lug position packaging groove 8 is positioned between the lug sol position packaging lugs 7. The pole ear position packaging grooves 8 of the 2 sealing head 2 mechanisms correspond to each other. The gradient width top seal head 2 formed by the lug colloidal sol position encapsulation lug 7 and the lug position encapsulation groove 8 ensures the encapsulation effect of the top seal lug colloidal sol position so as to reduce the risk of leakage of the top seal and damage of the lugs to the aluminum plastic film in the battery transfer process. The end socket 2 on be equipped with the spacing groove 11 that width and utmost point ear position encapsulation recess 8 are the same, the place face of spacing groove 11 adjacent with utmost point ear position encapsulation recess 8 place face, spacing groove 11 with utmost point ear position encapsulation recess 8 be linked together. The limiting groove 11 is used for compensating the problem of different thicknesses caused by the anode and cathode lugs, and the sol effect of the top-sealed lug position and the non-anode lug position can be ensured.
The flattening piece 9 is of a T-shaped structure. The protruding ends are used for flattening the top sealing edges of the aluminum plastic films at the pole lug positions, and the concave parts at the two sides are used for flattening the top sealing edges of the aluminum plastic films at the two sides of the pole lug positions.
When the top seal is packaged, the L type lug auxiliary heating block 3 and the end enclosure 2 are heated and simultaneously act to compensate the heat taken away by the positive and negative lugs during the top seal, the L type lug auxiliary heating block 3 moves up and down through the guide post, the force of the heating block additionally provided with the spring 4 is the force applied to the lug by the lug auxiliary heating block 3, so that the lug auxiliary heating block 3 is in close contact with the positive and negative lugs, the lug is prevented from being crushed, the sol effect of the lug position of the top seal is ensured, the metal belt limiting groove 6 is used for limiting the lug metal belt during the top seal, and the bad exposed size of the lug glue is reduced.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a soft packet of lithium cell's top sealing device which characterized in that: the end socket mechanism comprises 2 end socket mechanisms with the same structure and a flattening piece, wherein the end socket mechanisms are arranged oppositely, and the flattening piece is positioned on one side of the end socket mechanisms;
head mechanism include heat-generating body, head, utmost point ear auxiliary heating piece, heating piece install spring, heating piece guide post additional, the head be fixed in one side of heat-generating body, utmost point ear auxiliary heating piece pass through heating piece guide post with the heat-generating body link to each other, the heating piece install the spring housing additional in the outside of heating piece guide post to be located between heat-generating body and the utmost point ear auxiliary heating piece, head and utmost point ear auxiliary heating piece all be located the homonymy of heat-generating body, the head be located flattening and utmost point ear auxiliary heating piece between.
2. The top sealing device of the soft-package lithium battery as claimed in claim 1, wherein the tab auxiliary heating block is in L type structure, the top of the vertical part of the tab auxiliary heating block is movably connected with the heating block guide post, and the bottom protruding end of the tab auxiliary heating block is located at the side opposite to the end enclosure.
3. The capping device of the lithium-ion battery pack as claimed in claim 1, wherein: the end socket is transversely arranged, the top of the end socket is connected with the heating body, a lug position packaging groove and 2 lug sol position packaging lugs are arranged at the bottom of the end socket, and the lug position packaging groove is located between the lug sol position packaging lugs.
4. The capping device of the lithium-ion battery pack as claimed in claim 3, wherein: the polar ear position packaging grooves of the 2 head sealing mechanisms correspond to each other.
5. The capping device of the lithium-ion battery pack as claimed in claim 3, wherein: the end socket is provided with a limit groove with the same width as the lug position packaging groove, the surface of the limit groove is adjacent to the surface of the lug position packaging groove, and the limit groove is communicated with the lug position packaging groove.
6. The capping device of the lithium-ion battery pack as claimed in claim 1, wherein: the flattening piece is of a T-shaped structure.
7. The capping device of the lithium-ion battery pack as claimed in claim 1, wherein: and a metal belt limiting groove is formed in the auxiliary lug heating block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020033055.3U CN211150708U (en) | 2020-01-08 | 2020-01-08 | Top sealing device of soft package lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020033055.3U CN211150708U (en) | 2020-01-08 | 2020-01-08 | Top sealing device of soft package lithium battery |
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| Publication Number | Publication Date |
|---|---|
| CN211150708U true CN211150708U (en) | 2020-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020033055.3U Active CN211150708U (en) | 2020-01-08 | 2020-01-08 | Top sealing device of soft package lithium battery |
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| CN (1) | CN211150708U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112222596A (en) * | 2020-10-20 | 2021-01-15 | 天津市捷威动力工业有限公司 | Ultrasonic welding method for soft package lithium battery tab |
| CN112864439A (en) * | 2020-12-21 | 2021-05-28 | 湖南久森新能源有限公司 | Multi-temperature heat sealing machine for lithium battery |
-
2020
- 2020-01-08 CN CN202020033055.3U patent/CN211150708U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112222596A (en) * | 2020-10-20 | 2021-01-15 | 天津市捷威动力工业有限公司 | Ultrasonic welding method for soft package lithium battery tab |
| CN112864439A (en) * | 2020-12-21 | 2021-05-28 | 湖南久森新能源有限公司 | Multi-temperature heat sealing machine for lithium battery |
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