CN214203814U - Liquid leakage prevention tab of soft package lithium ion battery cell - Google Patents
Liquid leakage prevention tab of soft package lithium ion battery cell Download PDFInfo
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- CN214203814U CN214203814U CN202023218894.1U CN202023218894U CN214203814U CN 214203814 U CN214203814 U CN 214203814U CN 202023218894 U CN202023218894 U CN 202023218894U CN 214203814 U CN214203814 U CN 214203814U
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- glue groove
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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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Abstract
The utility model discloses a soft package lithium ion battery cell leakage-proof tab, which comprises an upper tab, wherein a tab glue groove is arranged at two ends of one side of the upper tab, a lower tab is arranged at one side of the tab glue groove far away from the upper tab, a tab colloid is arranged on the tab glue groove, the left side of the tab glue groove extends into the left part of the tab glue groove, the right side of the tab glue groove extends into the right part of the tab glue groove, the tab colloid comprises an outer film layer, a glue core layer and an inner film layer, the lower side of the outer film layer is bonded with the glue core layer, the lower side of the glue core layer is bonded with the inner film layer, the length of the upper tab is larger than that of the lower tab, the vertical distance of the right side of the tab colloid protruding out of the right part of the tab glue groove is 1.5 mm-3.5 m, the vertical distance of the left side of the tab colloid protruding out of the tab glue groove is 1.5 mm-3.5 m, the device can improve the leakage-proof effect of the battery cell in the subsequent use process, meanwhile, multiple effective packaging can be realized, and the functionality is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of soft package lithium ion battery, specifically be a soft package lithium ion battery cell leak protection liquid utmost point ear.
Background
In the manufacturing process of the existing soft package lithium ion battery, the battery cell packaging has a great influence on the quality of a finished product of the battery cell, particularly, the top edge of the soft package battery cell is subjected to heat sealing, namely top sealing, an outer tab (with tab glue) needs to be melted and sealed with a pp layer of an outer packaging aluminum-plastic film in a heat sealing mode, so that the inside of the battery cell is isolated from the outside, and external air and moisture are prevented from entering the battery cell; meanwhile, electrolyte is prevented from leaking to the outside of the battery core.
However, because the outer tab generally adopts a structure combining a strip-shaped metal conducting strip and tab glue, when the square groove heat sealing head is used for heat sealing, glue overflows from the steps at the two ends of the tab in the heat sealing area to form a weak packaging part, the weak packaging part becomes a high-risk liquid leakage area in the subsequent use process of the battery cell, and meanwhile, if a defective packaging product appears in the packaging process, the produced defective product can only be scrapped, so that the production effect is greatly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: in order to solve the problem, a liquid leakage prevention tab of a soft package lithium ion battery cell is provided.
The utility model adopts the technical scheme as follows: the utility model provides a soft packet of lithium ion cell leakage prevention liquid utmost point ear, includes utmost point ear, one side both ends of going up utmost point ear are provided with utmost point ear glue groove, the utmost point ear glue groove is kept away from one side of going up utmost point ear and is provided with down utmost point ear, be provided with utmost point ear colloid on the utmost point ear glue groove, the left side in utmost point ear glue groove extends to become utmost point ear glue groove left part, the right side in utmost point ear glue groove extends to become utmost point ear glue groove right part, utmost point ear colloid includes outer rete, glued sandwich layer and interior rete, the downside of outer rete bonds and is provided with glued sandwich layer, the downside of glued sandwich layer bonds and is provided with interior rete, the length of going up utmost point ear is greater than the length of utmost point ear down.
In a preferred embodiment, the vertical distance of the right side of the tab colloid protruding out of the tab glue groove is 1.5mm to 3.5m, and the vertical distance of the left side of the tab colloid protruding out of the tab glue groove is 1.5mm to 3.5 m.
In a preferred embodiment, the material of the outer film layer is an acid-modified epoxy resin material, the thickness of the outer film layer is about 45 μm to 75 μm, and the melting point of the outer film layer is 100 ℃ to 140 ℃.
In a preferred embodiment, the thickness of the upper tab is 0.6mm to 1.5mm, the thickness of the lower tab is 0.4 mm to 1.2mm, the overall thickness of the tab glue groove is 0.2mm to 0.6mm, and the widths of the upper tab and the lower tab are the same.
In a preferred embodiment, the thickness of the glue core layer is 40-70 μm, the melting point of the glue core layer is 140-160 ℃, and the glue core layer can be a polyethylene layer, a polyhydroxyethylenediamine layer, a polyvinyl methyl ether layer, a polymethyl methacrylate layer or a poly-3-phenyl-1-butylene layer.
In a preferred embodiment, the thickness of the inner film layer is 35 to 65 μm, the melting point of the inner film layer is 160 to 200 ℃, and the inner film layer may be a polyvinylidene fluoride layer, a poly-2, 2-dibenzoylethylenediamine layer, a poly-3-m-methylphenyl propylene layer, a poly-5-methyl-1-hexene layer, or a polytrifluoroethylene layer.
In a preferred embodiment, the right side line of the right part of the tab glue groove and the left side line of the left part of the tab glue groove are in smooth transition with the corresponding upper and lower edges, and the upper tab, the lower tab and the tab glue groove are all metal conducting plates.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses in, smooth transition between the limit about the right sideline of utmost point ear glue groove right part and the left sideline of utmost point ear glue groove left part and corresponding, the purpose is in order to prevent structurally to appear the closed angle and lead to stress concentration, has improved the protective effect to utmost point ear colloid, and utmost point ear glue groove left part can improve the atress distribution when receiving external force and dragging in the follow-up use simultaneously for heat-sealed region can tolerate bigger destructive power, has improved the antiseep effect.
2. The utility model discloses in, at the in-process of encapsulation, the rete is sour modified epoxy material, and the melting point is 100 ~ 140 ℃, can reduce the encapsulation temperature that utmost point ear glued, has realized the low temperature encapsulation.
3. The utility model discloses in, when the effect of encapsulation is not good, then the melting back of seal district will be sealed on the top to the same temperature when available and encapsulation utmost point ear, and the outer rete that utmost point ear was glued is peeled off, nevertheless glues the core layer and still has complete structure, can ensure flexible package lithium ion battery's the leakproofness of encapsulating once more, and interior rete can also be used for the third time to encapsulate simultaneously, and the practicality improves greatly.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the right-side view structure of the present invention;
FIG. 3 is a schematic diagram of a side view structure of the present invention;
fig. 4 is a schematic diagram of the sectional structure of the tab colloid of the present invention.
The labels in the figure are: 1-upper pole lug, 2-pole lug colloid, 201-inner film layer, 202-outer film layer, 203-glue core layer, 3-lower pole lug, 4-left pole lug glue groove, 5-right pole lug glue groove and 6-pole lug glue groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1-4, a soft package lithium ion battery cell leakage-proof tab comprises an upper tab 1, wherein two ends of one side of the upper tab 1 are provided with tab glue grooves 6, one side of the tab glue groove 6 away from the upper tab 1 is provided with a lower tab 3, tab glue 2 is arranged on the tab glue groove 6, the left side of the tab glue groove 6 extends to form a tab glue groove left part 4, the right side of the tab glue groove 6 extends to form a tab glue groove right part 5, the tab glue groove right part 5 and the tab glue groove left part 4 can improve the stress distribution when external force is drawn in the subsequent use process, so that a heat-sealed area can bear larger destructive force, the leakage-proof effect is improved, the tab glue 2 comprises an outer film layer 202, a glue core layer 203 and an inner film layer 201, the glue core layer 203 is bonded on the lower side of the outer film layer 202, the inner film layer 201 is bonded on the lower side of the glue core layer 203, and the length of the upper tab 1 is larger than that of the lower tab 3, the packaging temperature of the common tab colloid 2 is more than 140 ℃, the common tab colloid is not suitable for low-temperature packaging, in the packaging process of the device, the outer film layer 202 is made of an acid modified epoxy resin material, the melting point is 100-140 ℃, the packaging temperature of the tab colloid can be reduced, and meanwhile, the tab colloid 2 is formed by bonding three layers, so that the packaging effect at different temperatures can be realized.
It should be noted that the vertical distance of the right part 5 of the tab colloid 2 protruding out of the tab glue groove is 1.5mm to 3.5m, and the vertical distance of the left part 4 of the tab colloid 2 protruding out of the tab glue groove is 1.5mm to 3.5 m.
The material of the outer film layer 202 is an acid-modified epoxy resin material, the thickness of the outer film layer 202 is about 45 μm to 75 μm, and the melting point of the outer film layer 202 is 100 to 140 ℃.
The thickness of the upper tab 1 is 0.6mm to 1.5mm, the thickness of the lower tab 3 is 0.4 mm to 1.2mm, the overall thickness of the tab glue groove 6 is 0.2mm to 0.6mm, and the widths of the upper tab 1 and the lower tab 3 are the same.
The thickness of the rubber core layer 203 is 40-70 μm, the melting point of the rubber core layer 203 is 140-160 ℃, and the rubber core layer 203 can be a polyethylene layer, a polyhydroxyethylenediamine layer, a polyvinyl methyl ether layer, a polymethyl methacrylate layer or a poly-3-phenyl-1-butylene layer.
It should be noted that the thickness of the inner film layer 201 is 35-65 μm, the melting point of the inner film layer 201 is 160-200 ℃, the inner film layer 201 can be a polyvinylidene fluoride layer, a poly 2, 2-dibenzoyl ethylenediamine layer poly 3-m-methyl phenyl propylene layer, a poly 5-methyl-1-hexene layer or a polytrifluoroethylene layer, when the packaging effect is not good, the top sealing packaging area can be melted at the same temperature as that of the tab packaging, the packaging film and the winding core are rapidly separated, the outer film layer 202 of the tab colloid 2 is peeled off, but the rubber core layer 203 still has a complete structure, the sealing performance of the secondary packaging of the soft packaging lithium ion battery can be ensured, meanwhile, the inner film layer 201 can also be used for the third packaging, and the practicability is greatly improved.
It should be noted that, the right side line of the tab glue groove right portion 5 and the left side line of the tab glue groove left portion 4 are in smooth transition with the corresponding upper and lower edges, the upper tab 1, the lower tab 3 and the tab glue groove 6 are all metal conducting strips, and the right side line of the tab glue groove right portion 5 and the left side line of the tab glue groove left portion 4 are in smooth transition with the corresponding upper and lower edges, so that the protection effect of the tab glue is improved.
The working principle is as follows: this device is when using, and smooth transition between the right sideline of utmost point ear glue groove right part 5 and the left sideline of utmost point ear glue groove left part 4 and the upper and lower level of correspondence has improved the protection effect to utmost point ear colloid, and utmost point ear glue groove right part 5 and utmost point ear glue groove left part 4 can improve the atress distribution when receiving external force and dragging in the follow-up use simultaneously for the hot-seal region can tolerate bigger destructive power, has improved the antiseep effect.
Meanwhile, in the packaging process, the packaging temperature of a general tab colloid 2 is more than 140 ℃, the tab colloid is not suitable for low-temperature packaging, in the packaging process of the device, the outer film layer 202 is made of an acid modified epoxy resin material, the melting point is 100-140 ℃, the packaging temperature of the tab colloid can be reduced, meanwhile, the tab colloid 2 is formed by bonding three layers, the packaging effect at different temperatures can be realized, meanwhile, when the packaging effect is not good, the top sealing packaging area can be melted by using the same temperature as that used for packaging the tab, the packaging film is rapidly separated from a winding core, the outer film layer 202 of the tab colloid 2 is peeled off, but the glue core layer 203 still has a complete structure, the secondary packaging tightness of the flexible packaging lithium ion battery can be ensured, meanwhile, the inner film layer 201 can also be used for third packaging, and the practicability is greatly improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides a soft packet of lithium ion cell leak protection liquid utmost point ear, includes utmost point ear (1), its characterized in that: go up one side both ends of utmost point ear (1) and be provided with utmost point ear glue groove (6), utmost point ear glue groove (6) are kept away from one side of utmost point ear (1) and are provided with down utmost point ear (3), be provided with utmost point ear colloid (2) on utmost point ear glue groove (6), the left side in utmost point ear glue groove (6) is extended and is become utmost point ear glue groove left part (4), the right side in utmost point ear glue groove (6) is extended and is become utmost point ear glue groove right part (5), utmost point ear colloid (2) are including outer rete (202), glue rete (203) and interior rete (201), the downside bonding of outer rete (202) is provided with glued sandwich layer (203), the downside bonding of glued sandwich layer (203) is provided with interior rete (201), the length of going up utmost point ear (1) is greater than the length of utmost point ear (3) down.
2. The liquid leakage preventing tab of the soft package lithium ion battery cell of claim 1, wherein: the vertical distance of the right side of the tab colloid (2) protruding out of the tab glue groove right part (5) is 1.5 mm-3.5 m, and the vertical distance of the left side of the tab colloid (2) protruding out of the tab glue groove left part (4) is 1.5 mm-3.5 m.
3. The liquid leakage preventing tab of the soft package lithium ion battery cell of claim 1, wherein: the material of the outer film layer (202) is an acid-modified epoxy resin material, the thickness of the outer film layer (202) is about 45-75 μm, and the melting point of the outer film layer (202) is 100-140 ℃.
4. The liquid leakage preventing tab of the soft package lithium ion battery cell of claim 1, wherein: the thickness of the upper tab (1) is 0.6-1.5 mm, the thickness of the lower tab (3) is 0.4-1.2 mm, the overall thickness of the tab glue groove (6) is 0.2-0.6 mm, and the widths of the upper tab (1) and the lower tab (3) are the same.
5. The liquid leakage preventing tab of the soft package lithium ion battery cell of claim 1, wherein: the thickness of the rubber core layer (203) is 40-70 mu m, the melting point of the rubber core layer (203) is 140-160 ℃, and the rubber core layer (203) can be a polyethylene layer, a polyhydroxyethylenediamine layer, a polyvinyl methyl ether layer, a polymethyl methacrylate layer or a poly-3-phenyl-1-butylene layer.
6. The liquid leakage preventing tab of the soft package lithium ion battery cell of claim 1, wherein: the thickness of the inner film layer (201) is 35-65 mu m, the melting point of the inner film layer (201) is 160-200 ℃, and the inner film layer (201) can be a polyvinylidene fluoride layer, a poly 2, 2-dibenzoyl ethylenediamine layer, a poly 3-m-methylphenyl propylene layer, a poly 5-methyl-1-hexene layer or a polytrifluoroethylene layer.
7. The liquid leakage preventing tab of the soft package lithium ion battery cell of claim 1, wherein: the right side line of the right part (5) of the tab glue groove and the left side line of the left part (4) of the tab glue groove are in smooth transition with the corresponding upper and lower edges, and the upper tab (1), the lower tab (3) and the tab glue groove (6) are all metal conducting plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023218894.1U CN214203814U (en) | 2020-12-28 | 2020-12-28 | Liquid leakage prevention tab of soft package lithium ion battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023218894.1U CN214203814U (en) | 2020-12-28 | 2020-12-28 | Liquid leakage prevention tab of soft package lithium ion battery cell |
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| Publication Number | Publication Date |
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| CN214203814U true CN214203814U (en) | 2021-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023218894.1U Active CN214203814U (en) | 2020-12-28 | 2020-12-28 | Liquid leakage prevention tab of soft package lithium ion battery cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114497913A (en) * | 2022-01-28 | 2022-05-13 | 珠海冠宇动力电池有限公司 | Utmost point ear and battery |
| CN114497910A (en) * | 2022-01-10 | 2022-05-13 | 珠海冠宇电池股份有限公司 | Tab and battery comprising same |
-
2020
- 2020-12-28 CN CN202023218894.1U patent/CN214203814U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114497910A (en) * | 2022-01-10 | 2022-05-13 | 珠海冠宇电池股份有限公司 | Tab and battery comprising same |
| CN114497910B (en) * | 2022-01-10 | 2024-05-17 | 珠海冠宇电池股份有限公司 | Tab and battery comprising same |
| CN114497913A (en) * | 2022-01-28 | 2022-05-13 | 珠海冠宇动力电池有限公司 | Utmost point ear and battery |
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