CN212542525U - Top seal head of soft package lithium ion battery cell - Google Patents
Top seal head of soft package lithium ion battery cell Download PDFInfo
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- CN212542525U CN212542525U CN202021713303.5U CN202021713303U CN212542525U CN 212542525 U CN212542525 U CN 212542525U CN 202021713303 U CN202021713303 U CN 202021713303U CN 212542525 U CN212542525 U CN 212542525U
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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
A top seal head of a soft package lithium ion battery cell comprises an upper seal head and a lower seal head which are in mirror symmetry, wherein the opposite sealing surfaces of the upper seal head and the lower seal head are divided into an aluminum plastic film sealing area and an auxiliary heating area through a partition groove; the aluminum-plastic film packaging area is provided with a positive pole lug groove and a negative pole lug groove, the positive pole lug groove and the negative pole lug groove are in a step shape with the length gradually reduced, the positive pole lug groove comprises an outer layer step part, a middle layer step part and an inner layer step part, the length of the inner layer step part is matched with that of the positive pole lug, and the length of the outer layer step part is matched with that of the positive pole lug glue; the negative pole lug groove comprises an outer layer step two part, a middle layer step two part and an inner layer step two part, the length of the inner layer step two part is matched with the length of a negative pole lug, and the length of the outer layer step two part is matched with the length of a negative pole lug glue; the auxiliary heating zone is provided with an inwards concave groove, one end of the groove is communicated with the partition groove, and the bottom plane is higher than the bottom planes of the positive electrode lug groove and the negative electrode lug groove; the packaging effect is improved.
Description
Technical Field
The utility model relates to a battery manufacture equipment technical field specifically is a soft packet of lithium ion battery cell's top head.
Background
The soft package battery cell is packaged at the top of a first process after the battery cell enters a mould shell in the production process, the process is to package two layers of aluminum plastic films of a lithium ion battery cell and tab glue of positive and negative electrode tabs at one time through certain temperature, time and pressure, so that the effect of isolating the battery cell from the outside is achieved, but due to the existence of the positive and negative electrode tabs, the packaging difficulty is increased, particularly, the middle positions of the positive and negative electrode tabs are easy to generate folds in an aluminum plastic film packaging area in the middle of the positive and negative electrode tabs, and therefore, certain influence is brought to the packaging effect.
Meanwhile, for a high-power lithium ion battery cell, the relationship between the power of the battery cell and the current carrying capacity of the tab is considered, so that the thicknesses of the positive and negative tabs of the high-power battery cell are generally thicker. The packaging device adopted at present is that the upper and lower seal heads only heat the packaging parts of the cell aluminum plastic film and the tab glue, the tab does not contact the seal heads, and the heat can not be directly obtained from the seal heads. When heating top sealing, the electrode lug position is easily heated unevenly due to the fact that the electrode lug is thick, the packaging effect is not good, and therefore potential safety hazards such as electric core leakage are brought.
Disclosure of Invention
An object of the utility model is to solve the not enough of above-mentioned prior art to a soft packet of lithium ion electric core's top seal capping structure is provided, improves the security performance, improves the encapsulation effect, improves the product uniformity.
The utility model provides a following technical scheme: a top seal head of a soft package lithium ion battery cell comprises an upper seal head and a lower seal head which are in mirror symmetry, wherein the opposite sealing surfaces of the upper seal head and the lower seal head are divided into an aluminum plastic film sealing area and an auxiliary heating area through a partition groove extending along the length direction of the seal heads; the aluminum-plastic film packaging area is provided with a positive electrode tab groove and a negative electrode tab groove which correspond to a positive electrode tab and a negative electrode tab of the battery cell, the positive electrode tab groove and the negative electrode tab groove are in a step shape with the lengths gradually reduced, the positive electrode tab groove comprises an outer layer step part, a middle layer step part and an inner layer step part, the length of the inner layer step part is matched with that of the positive electrode tab, and the length of the outer layer step part is matched with that of a positive electrode tab adhesive; the negative pole lug groove comprises an outer layer step two part, a middle layer step two part and an inner layer step two part, the length of the inner layer step two part is matched with the length of a negative pole lug, and the length of the outer layer step two part is matched with the length of a negative pole lug glue; the auxiliary heating zone is provided with an indent groove for containing the cell tab which is not pasted with tab glue, one end of the groove is communicated with the partition groove, and the bottom plane is higher than the bottom planes of the positive tab groove and the negative tab groove.
The other end of the groove is flush with the side edge of the seal head.
The vertical distance between the bottom plane of the groove and the bottom planes of the positive electrode lug groove and the negative electrode lug groove is the total thickness of the electrode lug glue on one side of the battery cell and the aluminum plastic film.
The total depth of the positive pole lug groove is 40% -60% of the sum of the thicknesses of the positive pole lug, the positive pole lug glue and the aluminum plastic film on the two sides of the positive pole lug, the depth of the middle step is 40% -60% of the sum of the thicknesses of the positive pole lug glue and the aluminum plastic film on the two sides of the positive pole lug, and the depth of the outer step is 20% -30% of the sum of the thicknesses of the positive pole lug glue and the aluminum plastic film on the two sides of the positive pole lug.
The length of one part of the middle step is 70-80% of the length of the anode tab glue.
The total depth of the grooves of the negative pole lugs is 40-60% of the sum of the thicknesses of the negative pole lugs and the aluminum plastic films on the two sides of the negative pole lugs, the depth of the second middle-layer step is 40-60% of the sum of the thicknesses of the negative pole lugs and the aluminum plastic films on the two sides of the negative pole lugs, and the depth of the second outer-layer step is 20-30% of the sum of the thicknesses of the negative pole lugs and the aluminum plastic films on the two sides of the negative pole lugs.
The length of the second part of the middle step is 70-80% of the length of the anode tab glue.
The plastic-aluminum membrane encapsulation district is equipped with two overflow and glues the groove along head width direction extension, and two overflow glue groove one end link up with cutting off the groove, and the other end is parallel and level with the head side.
Two outer side edges of the aluminum plastic film packaging edge of the battery cell are respectively positioned in the two glue overflowing grooves, and the top end of the aluminum plastic film packaging edge of the battery cell is positioned in the partition groove.
The upper sealing head and the lower sealing head are provided with a plurality of screw holes and are arranged on an upper base and a lower base of the packaging machine which are internally provided with heating blocks through a plurality of bolts; the upper end enclosure and the lower end enclosure are made of hard copper materials
The utility model has the advantages that: firstly, the utility model carries out auxiliary heating on the positive and negative electrode tabs, reduces the heat loss of the tab packaging area of the aluminum-plastic film, and can ensure that the tab packaging area is uniformly heated even if the tab thickness of the high-power soft-packaged battery cell is larger, thereby reducing the phenomenon of unstable packaging; secondly, the depth and the length of different positions of the stepped groove can be controlled according to the thickness and the length of different positions of the lug and lug glue by the stepped groove corresponding to the mirror images of the lug packaging area of the aluminum plastic film of the upper end socket and the lower end socket, the direction position of sol during packaging is controlled, adverse effects on packaging caused by the thickness of the lug, the excessive sol and other factors are avoided, the packaging consistency is increased, the packaging reliability of top sealing of the battery cell is improved, the packaging defects of the top sealing of the battery cell are reduced, and the perfect packaging effect is achieved.
Drawings
FIG. 1 is a schematic view of the structure of the upper head of the present invention;
fig. 2 is a bottom view of the upper head of the utility model;
FIG. 3 is a schematic view of the structure of the lower head of the present invention;
fig. 4 is a top view of the lower head of the present invention;
fig. 5 is a schematic view of the lower head according to the present invention;
in the figure: 1. an upper end enclosure; 2. a lower end enclosure; 3. an upper partition groove; 4. an aluminum plastic film packaging area is arranged; 5. an upper auxiliary heating zone; 6. a lower partition groove; 7. a lower aluminum plastic film packaging area; 8. a lower auxiliary heating zone; 9. an upper positive electrode tab groove; 10. an upper negative electrode tab groove; 11. a lower positive electrode tab groove; 12. a lower negative electrode tab groove; 13. an overflow glue groove; 14. an overflow glue groove; 15. underflow rubber grooves; 16. underflow rubber grooves; 17. and a screw hole.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The utility model comprises an upper seal head 1 and a lower seal head 2 which are mirror-symmetrical up and down; the upper end enclosure 1 and the lower end enclosure 2 are provided with a plurality of screw holes 17 and are arranged on an upper base and a lower base of the packaging machine which are internally provided with heating blocks through a plurality of bolts; the upper end enclosure 1 and the lower end enclosure 2 are made of hard copper materials, soft-sealing packaging forms such as silica gel strips are avoided, and phenomena such as uneven heat conduction and poor sealing caused by the silica gel strips are avoided.
In fig. 1 and 2, an upper partition groove 3 is arranged on an upper end enclosure 1, and the upper partition groove 3 divides the upper end enclosure into two regions, namely an upper aluminum-plastic film packaging region 4 and an upper auxiliary heating region 5; an upper positive pole lug groove 9 and an upper negative pole lug groove 10 are arranged in the upper aluminum plastic film packaging area 4, the upper positive pole lug groove 9 and the upper negative pole lug groove 10 are in a step shape with the length gradually reduced, the upper positive pole lug groove 9 comprises an outer layer step part, a middle layer step part and an inner layer step part, the total length of the outer layer step part is generally about the length of positive pole lug glue, the length of the middle layer step part is generally about 70-80% of the length of the positive pole lug glue, and the length of the inner layer step part is generally about the length of the positive pole lug; the total depth of the upper positive pole lug groove 9 is about 40% -60% of the sum of the thicknesses of the positive pole lug, the positive pole lug glue and the aluminum plastic film on two sides of the positive pole lug, the depth of the middle step part is about 40% -60% of the sum of the thicknesses of the positive pole lug glue and the aluminum plastic film on two sides of the positive pole lug, and the depth of the outer step part is about 20% -30% of the sum of the thicknesses of the positive pole lug glue and the aluminum plastic film on two sides of the positive pole lug. Go up negative pole utmost point ear recess 10 and include two portions of outer step, two portions of middle level step and two portions of inlayer step, the total length of two portions of outer step generally is about the length that negative pole utmost point ear glued, and the length of two portions of middle level step generally is about 70% -80% of negative pole utmost point ear glued length, and the length of two portions of inlayer step generally is about the length of negative pole utmost point ear. The total depth of the upper negative pole lug groove 10 is about 40-60% of the sum of the thicknesses of the negative pole lug glue and the aluminum plastic film on the two sides of the negative pole lug, the depth of the middle layer step two part is 40-60% of the sum of the thicknesses of the negative pole lug glue and the aluminum plastic film on the two sides of the negative pole lug, and the depth of the outer layer step two part is 20-30% of the sum of the thicknesses of the negative pole lug glue and the aluminum plastic film on the two sides of the negative pole lug. The last plastic-aluminum membrane encapsulation district 4 at last head 1 is equipped with and overflows gluey groove 13, the last groove 14 that overflows that extends along head width direction, two overflow gluey groove one end and last wall groove 3 link up, the other end and head side parallel and level, and two outside limits on the plastic-aluminum membrane encapsulation limit of electric core are located two respectively and overflow gluey grooves, and the top on the plastic-aluminum membrane encapsulation limit of electric core is located and cuts off among the groove. The upper auxiliary heating zone 5 is provided with a concave groove for containing the battery cell tab which is not pasted with tab glue, one end of the groove is communicated with the partition groove, and the other end of the groove is flush with the side edge of the sealing head; the bottom plane of the groove is higher than the bottom planes of the positive pole lug groove and the negative pole lug groove.
In fig. 3, 4 and 5, a lower partition groove 6 is arranged on the lower end enclosure 2, the positions of the upper partition groove 3 and the lower partition groove 6 are relatively kept consistent, and the lower end enclosure is divided into two areas by the lower partition groove 6, namely a lower aluminum-plastic film packaging area 7 and a lower auxiliary heating area 8; the lower aluminum-plastic film packaging area 7 is provided with a lower positive electrode tab groove 11 and a lower negative electrode tab groove 12, and the lower positive electrode tab groove 11 and the upper positive electrode tab groove 9 have the same structure and are opposite up and down; the lower negative pole tab groove 12 is the same as the upper negative pole tab groove 10 in structure and is opposite to the upper negative pole tab groove; the lower plastic-aluminum film packaging area 7 is provided with a lower glue flowing groove 15 and a lower glue flowing groove 16, the positions of the upper glue flowing groove 13 and the upper glue flowing groove 15 are consistent, and the openings are opposite. The lower auxiliary heating area 8 is provided with grooves which are symmetrical with the grooves on the upper auxiliary heating area 5; the groove of the auxiliary heating area can enable the lug to be in a horizontal state in the aluminum plastic film packaging area and the auxiliary heating area during top sealing, is not influenced by external force, avoids poor packaging caused by uneven lug position, and reduces collision scratch and the like to the lug during packaging.
During the encapsulation, put into soft packet of lithium ion electric core's front end the utility model discloses an between upper cover 1 and the low head 2. The top sealing area of the soft package lithium ion battery cell is arranged on the lower aluminum-plastic film packaging area 7, the positive electrode tab and the negative electrode tab are arranged in the lower electrode tab auxiliary heating area 8, the positive electrode tab glue and the negative electrode tab glue which are attached to the positive electrode tab and the negative electrode tab are respectively positioned at the lower positive electrode tab groove 11 and the lower negative electrode tab groove 12 of the lower sealing head 2, and the packaging edge edges at the two sides of the aluminum-plastic film are respectively positioned at the lower glue flowing groove 15 and the lower glue flowing groove 16 of the lower sealing head. The upper sealing head 1 is pushed to move towards the lower sealing head 2, and the aluminum-plastic film is tightly combined with the lug glue inside under the heating and pressing of the aluminum-plastic film packaging area, so that a good packaging effect is achieved. The lug can obtain heat through the upper lug auxiliary heating area 5 and the lower lug auxiliary heating area 8, and even if the thickness of the lug is larger, the effect of uniform heating can be achieved. Simultaneously, utmost point ear and utmost point ear glue are located just of the relative echelonment of upper and lower head, in the negative pole ear recess, even utmost point ear and utmost point ear glue thickness of high-power soft-packaged electrical core is great, also can guarantee utmost point ear central point and put and the aluminium-plastic membrane height is unanimous basically in the horizontal direction, and just of upper and lower head, negative pole ear recess degree of depth is unanimous, be favorable to the encapsulation back utmost point ear position between two parties, reduce the upper and lower skew of encapsulation back utmost point ear position, can effectively control electric core encapsulation thickness, improve the quality of electric core top seal, reduce the appearance of flaw, avoid appearing phenomenons such as encapsulation harmfully and excessively encapsulating, avoid the potential safety. Because the upper partition groove 3 and the lower partition groove 6 are in partition action, the heating of the aluminum plastic film packaging area and the heating of the lug are not interfered with each other, the control of top sealing glue overflow of the battery core is facilitated, the pollution of glue overflow of the aluminum plastic film and the lug to the end socket during packaging can be avoided, the packaging quality is further influenced, and meanwhile, the edge glue overflow pollution of the aluminum plastic film during packaging can be avoided by the upper glue overflow grooves (13 and 14) and the lower glue overflow grooves (15 and 16), so that the production efficiency and the battery core packaging quality are improved.
The utility model has the advantages that the auxiliary heating zone of the tab and the aluminum plastic film packaging zone are of an integrated structure, and can be integrally arranged on the base with the heating device, so that the temperature of the auxiliary heating zone of the tab and the aluminum plastic film packaging zone is consistent, and the temperature error is reduced; meanwhile, other fixed mounting structures are avoided, the mounting and dismounting process is simple and convenient, and the problem that the packaging consistency is influenced due to the fact that mounting parts such as screws are loosened possibly caused by multiple times of packaging can be avoided.
The stepped groove is adopted to control the sol moving direction position during packaging, the depths and the lengths of different positions of the stepped groove can be controlled according to the thicknesses and the lengths of different positions of the lug and the lug glue, adverse effects on packaging caused by the thickness of the lug, excessive sol and other factors are avoided, and the packaging consistency is increased.
The utility model discloses do not require the recess size of positive negative pole ear unanimous, it can set up the size of notch cuttype recess according to the positive negative pole ear size that electric core actually adopted, and the degree of depth and length etc. of recess all can change. The positive and negative electrode lug grooves can be changed according to the actual conditions of the battery cell, and the influence of groove depth increase on the aluminum plastic film seal can be reduced through the stepped structure.
The above description is only for the specific embodiments of the present invention, and it should be noted that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention.
Claims (10)
1. The utility model provides a soft packet of lithium ion cell's top seal head which characterized in that: the sealing structure comprises an upper sealing head (1) and a lower sealing head (2) which are in mirror symmetry, wherein the opposite sealing surfaces of the upper sealing head (1) and the lower sealing head (2) are divided into an aluminum-plastic film sealing area and an auxiliary heating area through partition grooves extending along the length direction of the sealing heads; the aluminum-plastic film packaging area is provided with a positive electrode tab groove and a negative electrode tab groove which correspond to a positive electrode tab and a negative electrode tab of the battery cell, the positive electrode tab groove and the negative electrode tab groove are in a step shape with the lengths gradually reduced, the positive electrode tab groove comprises an outer layer step part, a middle layer step part and an inner layer step part, the length of the inner layer step part is matched with that of the positive electrode tab, and the length of the outer layer step part is matched with that of a positive electrode tab adhesive; the negative pole lug groove comprises an outer layer step two part, a middle layer step two part and an inner layer step two part, the length of the inner layer step two part is matched with the length of a negative pole lug, and the length of the outer layer step two part is matched with the length of a negative pole lug glue; the auxiliary heating zone is provided with an indent groove for containing the cell tab which is not pasted with tab glue, one end of the groove is communicated with the partition groove, and the bottom plane is higher than the bottom planes of the positive tab groove and the negative tab groove.
2. The capping head of the soft package lithium ion battery cell of claim 1, characterized in that: the other end of the groove is flush with the side edge of the seal head.
3. The capping head of the soft package lithium ion battery cell of claim 1 or 2, characterized in that: the vertical distance between the bottom plane of the groove and the bottom planes of the positive electrode lug groove and the negative electrode lug groove is the total thickness of the electrode lug glue on one side of the battery cell and the aluminum plastic film.
4. The capping head of the soft package lithium ion battery cell of claim 1, characterized in that: the total depth of the positive pole lug groove is 40% -60% of the sum of the thicknesses of the positive pole lug, the positive pole lug glue and the aluminum plastic film on the two sides of the positive pole lug, the depth of the middle step is 40% -60% of the sum of the thicknesses of the positive pole lug glue and the aluminum plastic film on the two sides of the positive pole lug, and the depth of the outer step is 20% -30% of the sum of the thicknesses of the positive pole lug glue and the aluminum plastic film on the two sides of the positive pole lug.
5. The capping head of the soft package lithium ion battery cell of claim 4, characterized in that: the length of one part of the middle step is 70-80% of the length of the anode tab glue.
6. The capping head of the soft package lithium ion battery cell of claim 1 or 4, characterized in that: the total depth of the grooves of the negative pole lugs is 40-60% of the sum of the thicknesses of the negative pole lugs and the aluminum plastic films on the two sides of the negative pole lugs, the depth of the second middle-layer step is 40-60% of the sum of the thicknesses of the negative pole lugs and the aluminum plastic films on the two sides of the negative pole lugs, and the depth of the second outer-layer step is 20-30% of the sum of the thicknesses of the negative pole lugs and the aluminum plastic films on the two sides of the negative pole lugs.
7. The capping head of the soft package lithium ion battery cell of claim 6, characterized in that: the length of the second part of the middle step is 70-80% of the length of the anode tab glue.
8. The capping head of the soft package lithium ion battery cell of claim 1, characterized in that: the plastic-aluminum membrane encapsulation district is equipped with two overflow and glues the groove along head width direction extension, and two overflow glue groove one end link up with cutting off the groove, and the other end is parallel and level with the head side.
9. The capping head of the soft package lithium ion battery cell of claim 8, characterized in that: two outer side edges of the aluminum plastic film packaging edge of the battery cell are respectively positioned in the two glue overflowing grooves, and the top end of the aluminum plastic film packaging edge of the battery cell is positioned in the partition groove.
10. The capping head of the soft package lithium ion battery cell of claim 1, characterized in that: the upper sealing head (1) and the lower sealing head (2) are provided with a plurality of screw holes and are arranged on an upper base and a lower base of the packaging machine which are internally provided with heating blocks through a plurality of bolts; the upper seal head (1) and the lower seal head (2) are made of hard copper materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021713303.5U CN212542525U (en) | 2020-08-17 | 2020-08-17 | Top seal head of soft package lithium ion battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021713303.5U CN212542525U (en) | 2020-08-17 | 2020-08-17 | Top seal head of soft package lithium ion battery cell |
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| Publication Number | Publication Date |
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| CN212542525U true CN212542525U (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021713303.5U Active CN212542525U (en) | 2020-08-17 | 2020-08-17 | Top seal head of soft package lithium ion battery cell |
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| CN (1) | CN212542525U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113241466A (en) * | 2021-05-11 | 2021-08-10 | 宜春清陶能源科技有限公司 | Packaging process of battery |
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2020
- 2020-08-17 CN CN202021713303.5U patent/CN212542525U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113241466A (en) * | 2021-05-11 | 2021-08-10 | 宜春清陶能源科技有限公司 | Packaging process of battery |
| CN113241466B (en) * | 2021-05-11 | 2022-07-26 | 宜春清陶能源科技有限公司 | Packaging process of battery |
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Effective date of registration: 20210924 Address after: 441000 No.18 Wuxi Road, high tech Zone, Xiangyang City, Hubei Province Patentee after: CAMEL GROUP NEW ENERGY CELL Co.,Ltd. Address before: Floor g6-1001, Wuhan New Energy Research Institute building, 999 Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430000 Patentee before: Camel Group Wuhan New Energy Technology Co.,Ltd. |