阅读说明：本技术 一种二封封头结构及其使用方法 (Two-seal end socket structure and using method thereof ) 是由 杨纪荣 盖建宝 杨晴 刘亚明 彭舜 于 2021-01-15 设计创作，主要内容包括：本发明涉及的是锂电池技术领域,尤其是涉及一种二封封头机构及其使用方法。包括封头单体,所述封头单体包括封头底座,封头承接块,封头主体以及导热硅胶；所述封头底座上设有螺孔；所述封头承接块的上端与封头主体连接,下端固定在封头底座上,且封头承接块的一侧边与封头主体的一侧边成一平面；所述封头主体上设有至少一个避胶槽,且封头主体上还设置有限位块；所述导热硅胶填充到封头主体上的避胶槽中。本发明通过将设置的T型导热硅胶放入T型避胶槽内,由于T型导热硅胶有一定的弹性,从而可以确保电池二封边在T型避胶槽内的熔胶效果,确保电池的密封性能；而且本发明的结构简单,方法操作简便,有效地提高了锂电池的生产效率。(The invention relates to the technical field of lithium batteries, in particular to a double-sealing end socket mechanism and a using method thereof. The heat-conducting sealing head comprises a sealing head single body, wherein the sealing head single body comprises a sealing head base, a sealing head bearing block, a sealing head main body and heat-conducting silica gel; a screw hole is formed in the seal head base; the upper end of the end socket bearing block is connected with the end socket main body, the lower end of the end socket bearing block is fixed on the end socket base, and one side edge of the end socket bearing block and one side edge of the end socket main body form a plane; the seal head main body is provided with at least one glue avoiding groove and a limiting block; and the heat-conducting silica gel is filled in the gel avoiding groove on the end socket main body. According to the invention, the arranged T-shaped heat-conducting silica gel is placed in the T-shaped glue avoiding groove, and the T-shaped heat-conducting silica gel has certain elasticity, so that the glue melting effect of the edge sealing of the battery II in the T-shaped glue avoiding groove can be ensured, and the sealing performance of the battery is ensured; the invention has simple structure and simple and convenient operation of the method, and effectively improves the production efficiency of the lithium battery.)

1. A double-seal end socket structure is characterized by comprising an end socket single body, wherein the end socket single body comprises an end socket base, an end socket bearing block, an end socket main body and heat-conducting silica gel; screw holes are formed in the end socket base and are arranged on two side edges of the end socket bearing block in order; the upper end of the end socket bearing block is connected with the end socket main body, the lower end of the end socket bearing block is fixed in the middle of the end socket base, and one side of the end socket bearing block and one side of the end socket main body form a plane; the seal head main body is provided with at least one glue avoiding groove, and two ends of the seal head main body are also provided with raised limiting blocks; and the heat-conducting silica gel is filled in the gel avoiding groove on the end socket main body.

2. A two-seal head structure according to claim 1, wherein the shape of the heat-conducting silica gel is T-shaped, and the heat-conducting silica gel is an elastic conductive material or a material with low expansion rate.

3. A two seal head structure according to claim 1, characterized in that the screw hole is U-shaped for fixing the head unit, and the screw hole includes an upper screw hole and a lower screw hole, the upper screw hole is longer than the lower screw hole, and the upper screw hole communicates with the lower screw hole.

4. The structure of claim 1, wherein the glue avoiding grooves are T-shaped, and the distance between every two glue avoiding grooves is 90-150 mm.

5. A two-seal head structure according to claim 1, wherein the depth M of the glue avoiding groove is smaller than the height of the head main body, the depth Q of the glue avoiding groove is set to 1/5-1/4 of the depth M, and the depth M ranges from 50mm to 100 mm.

6. A two-seal end socket structure according to claim 1, wherein the width K of the glue avoiding groove is set to be 2mm to 3mm, and the width L of the glue avoiding groove is set to be 4mm to 5 mm.

7. The two-seal head structure according to claim 1, wherein the height of the limiting block is 70% -80% of the height of the double-layer aluminum-plastic film, wherein the height of the double-layer aluminum film ranges from 100um to 300 um.

8. The structure of claim 1, wherein the width W of the heat-conducting silica gel is 0.1mm to 0.2mm smaller than the width K of the glue avoiding groove, and the width V of the heat-conducting silica gel is 0.01mm to 0.1mm smaller than the width L of the glue avoiding groove.

9. A two-seal head structure according to claim 1, wherein the height S of the heat-conducting silica gel is 0.001mm to 0.01mm greater than the depth Q of the glue avoiding groove, and the height R of the heat-conducting silica gel is 0.001mm to 0.01mm greater than the difference of the depth Q of the glue avoiding groove.

10. An application method of the double-seal end socket structure of any one of claims 1-9, wherein each end socket comprises two single end socket bodies, the length and the width of the two single end socket bodies are consistent, the two single end socket bodies are installed in opposite directions, and the protruding limiting blocks on the end socket main bodies on the two single end socket bodies are in contact with each other when the equipment works.

Technical Field

The invention relates to the technical field of lithium batteries, in particular to a double-sealing end socket mechanism and a using method thereof.

Background

With the increasing maturity of the lithium battery industry, the transparentization of the lithium battery material price and the improvement of the manual production cost, the profit of the lithium battery is compressed step by step. Therefore, reducing the manufacturing cost of batteries is a constant theme for enterprises to operate healthier and longer. In the prior stage, in order to reduce labor cost, modes of improving the production efficiency of the battery, carrying out peak shifting power utilization and the like are mainly adopted. At present, the production efficiency of the equipment is usually changed in order to improve the production efficiency of the battery. The secondary sealing process is an important process of the lithium ion battery and a bottleneck process for improving the production efficiency, and the process has been updated by a plurality of equipment technologies from the appearance of the polymer battery to the present. The battery that can encapsulate in unit time is from 1pcs before to present 3pcs even 5pcs, and the head of battery encapsulation is from first 150mm to present 350mm even 450mm, but along with the increase of head length, the deformation volume of head will be bigger to can't guarantee the depth of parallelism of head, the encapsulation effect of battery will worsen. As the service time is prolonged, the defective ratio will further increase, thereby causing the battery to fail to ensure the corresponding packaging effect in the secondary packaging process.

Chinese patent CN210778853U discloses an automatic two-seal head of two shaping production lines of lithium cell, including the main part support, the top of main part support is installed and is driven actuating cylinder, and the flexible pipe that drives actuating cylinder passes the top and the fixed mounting of main part support downwards has a mounting panel, and vertical movement's upper cover is installed to the bottom of mounting panel, and the bottom head that corresponds with the upper cover is installed to the bottom of main part support. The utility model discloses novel structure adopts two segmentation capping structures, and adjustment depth of parallelism, plane degree when two encapsulation of being convenient for optimize product quality, are convenient for maintain.

Chinese patent CN207558974U discloses a lithium battery packaging tool structure, which includes a lower end enclosure and an upper end enclosure that are mutually matched for packaging a lithium battery; the lower end enclosure comprises a lower sealing bottom plate and a lower sealing longitudinal plate vertically connected with the lower sealing bottom plate; the two end parts of the lower sealing longitudinal plate are provided with lower sealing convex parts, a lower sealing concave part is arranged between the two lower sealing convex parts, the upper part of the lower sealing concave part is provided with two lower lug slot positions, and the two end parts of the lower sealing concave part are provided with glue avoiding slots; the upper end enclosure comprises an upper end enclosure top plate and an upper end enclosure longitudinal plate vertically connected with the upper end enclosure top plate; the two ends of the upper sealing longitudinal plate are provided with upper sealing convex pieces, an upper sealing concave piece is arranged between the two upper sealing convex pieces, and the upper sealing concave piece is provided with two upper lug slots. The depth of the glue avoiding groove is set to be 0.12 mm-0.16 mm. The depth of the glue avoiding groove is set to be 0.14 mm. The lower sealing bottom plate is provided with a plurality of lower through holes. The lower through hole comprises a first lower through hole and a second lower through hole which are communicated with each other, and the width of the first lower through hole is larger than that of the second lower through hole. The upper capping plate is provided with a plurality of upper through holes. The upper through hole comprises a first upper through hole and a second upper through hole which are communicated with each other, and the width of the first upper through hole is larger than that of the second upper through hole. Because be provided with and keep away the gluey groove, consequently this lithium cell encapsulation frock structure can avoid CPP to cross the problem of melting and fracture, and then guarantees that the product outward appearance is pleasing to the eye to make the product security performance good.

Chinese patent CN211404619U discloses a head structure for soft packet of lithium battery package relates to the encapsulation field of soft packet of lithium battery, including the upper die base that has the upper cover and the die holder that has the low head, upper cover and low head are corresponding, and all have utmost point ear encapsulation groove and the suppression face that is located utmost point ear encapsulation groove both sides, it glues the encapsulation groove to be provided with the utmost point ear between suppression face and the utmost point ear encapsulation groove, set up the cambered surface between utmost point ear glue encapsulation groove and the utmost point ear encapsulation groove. By adopting the technical scheme, the end socket is provided with the grooves corresponding to the lug and lug glue packaging positions, when the packaging is carried out, the stress is uniform at each position, the problems of air leakage and bulging caused by poor sol effect due to uneven stress heating at the combined position of the lug and the non-lug are reduced, the joint of the lug and the lug glue groove is designed to be arc-shaped, the arc-shaped boundary is utilized to reduce the gap existing in the packaging of the two sides of the lug, and the poor packaging phenomenon caused by the deviation of the lug can be reduced.

The above published patent documents all relate to the technical field of lithium batteries, wherein patent CN210778853U correspondingly installs upper and lower end enclosures in upper and lower vacuum chambers, respectively, adopts a two-stage end enclosure structure, and the structure is relatively complex, and does not mention the problem of being able to solve the battery encapsulation property, which is different from the technical scheme of the present application, and the technical problems to be solved are not completely the same; patent CN207558974U and patent CN211404619U are both different from the technical solutions of the present application, and the technical problems to be solved are not completely the same. Based on the technical problems, the invention provides a double-seal end socket structure and a using method thereof, wherein T-shaped glue avoiding grooves are formed in an end socket main body and an end socket bearing block, and the T-shaped glue avoiding grooves can effectively slow down and release thermal stress generated by heating an end socket, so that the parallelism of the end socket is ensured; the arranged T-shaped heat-conducting silica gel is placed in the T-shaped glue avoiding groove, and the T-shaped heat-conducting silica gel has certain elasticity, so that the glue melting effect of the edge sealing of the battery II in the T-shaped glue avoiding groove can be ensured, and the sealing performance of the battery is ensured; the invention has simple structure and simple and convenient method operation, and effectively improves the production efficiency of the lithium battery.

Disclosure of Invention

The invention provides a double-seal end socket structure and a using method thereof, aiming at the problems in the prior art.

In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:

a double-seal end socket structure comprises an end socket single body, wherein the end socket single body comprises an end socket base, an end socket bearing block, an end socket main body and heat-conducting silica gel; screw holes are formed in the end socket base and are arranged on two side edges of the end socket bearing block in order; the upper end of the end socket bearing block is connected with the end socket main body, the lower end of the end socket bearing block is fixed in the middle of the end socket base, and one side of the end socket bearing block and one side of the end socket main body form a plane; the seal head main body is provided with at least one glue avoiding groove, and two ends of the seal head main body are also provided with raised limiting blocks; and the heat-conducting silica gel is filled in the gel avoiding groove on the end socket main body.

Further, the shape of heat conduction silica gel is T type, and heat conduction silica gel is the material that has elastic electrically conductive material or has low expansion rate.

Furthermore, the screw hole is U-shaped and used for fixing the end socket monomer, the screw hole comprises an upper screw hole and a lower screw hole, the length of the upper screw hole is larger than that of the lower screw hole, and the upper screw hole is communicated with the lower screw hole.

Furthermore, the glue avoiding grooves are T-shaped, and the uniformly distributed distances between every two glue avoiding grooves are set to be 90-150 mm.

Further, the depth M of the glue avoiding groove is smaller than the height of the seal head main body, the depth Q of the glue avoiding groove is 1/5-1/4 of the depth M, and the range of the depth M is 50-100 mm.

Further, the width K of the glue avoiding groove is set to be 2-3 mm, and the width L of the glue avoiding groove is set to be 4-5 mm.

Furthermore, the height of the limiting block is 70% -80% of the height of the double-layer aluminum-plastic film, wherein the height range of the double-layer aluminum film is 100 um-300 um.

Further, the width W of the heat-conducting silica gel is 0.1-0.2 mm smaller than the width K of the glue avoiding groove, and the width V of the heat-conducting silica gel is 0.01-0.1 mm smaller than the width L of the glue avoiding groove.

Further, the height S of the heat-conducting silica gel is 0.001-0.01 mm larger than the depth Q of the glue avoiding groove, and the height R of the heat-conducting silica gel is 0.001-0.01 mm larger than the difference value of the depth Q of the glue avoiding groove.

Furthermore, each seal head comprises two seal head monomers, the length and the width of the two seal head monomers are consistent, the two seal head monomers are installed in opposite directions, and the protruding limiting blocks on the seal head main bodies on the two seal head monomers are in mutual contact when the equipment works.

Compared with the prior art, the invention has the following beneficial effects:

(1) according to the invention, the T-shaped glue avoiding grooves are formed in the end socket main body and the end socket bearing block, and can effectively slow down and release thermal stress generated by heating the end socket, so that the parallelism of the end socket is ensured;

(2) according to the invention, the arranged T-shaped heat-conducting silica gel is placed in the T-shaped glue avoiding groove, and the T-shaped heat-conducting silica gel has certain elasticity, so that the glue melting effect of the edge sealing of the battery II in the T-shaped glue avoiding groove can be ensured, and the sealing performance of the battery is ensured;

(3) the invention has simple structure and simple and convenient method operation, and effectively improves the production efficiency of the lithium battery.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the head unit of the present invention;

FIG. 3 is a left side view of the head unit of the present invention;

FIG. 4 is a top view of a head cell of the present invention;

fig. 5 is a schematic structural view of the T-shaped thermal conductive silica gel in this embodiment;

FIG. 6 is a partial schematic view of the glue avoiding groove in the present embodiment;

the reference numbers are as follows: 1. a seal head monomer; 11. a seal head base; 111. a screw hole; 12. a seal head bearing block; 13. a seal head main body; 131. a glue avoiding groove; 132. a limiting block; 14. thermally conductive silicone.

Detailed Description

In order to make the purpose and technical solution of the present invention clearer, the following will clearly and completely describe the technical solution of the present invention with reference to the embodiments.

Example 1

The two-seal end socket structure shown in fig. 1-6 comprises an end socket single body 1, wherein the end socket single body 1 comprises an end socket base 11, an end socket bearing block 12, an end socket main body 13 and heat-conducting silica gel 14; a screw hole 111 is formed in the end socket base 11; the upper end of the end socket bearing block 12 is connected with the end socket main body 13, the lower end is fixed on the end socket base 11, the end socket bearing block 12 is a key part for bearing the end socket base 11 and the end socket main body 13, and in order to control the size of a non-sealed area of a battery, one side of the end socket bearing block 12 must be connected with one side of the end socket main body 13 to form a plane; the end socket main body 13 is provided with at least one glue avoiding groove 131 for releasing the stress of the end socket, the glue avoiding groove 131 can effectively slow down and release the thermal stress generated by heating the end socket so as to ensure the parallelism of the end socket, and the end socket main body 13 is also provided with a limiting block 132; the heat-conducting silica gel 14 is filled in the glue avoiding groove 131 of the end socket main body 13, and the heat-conducting silica gel 14 has certain elasticity, so that the glue melting effect of the edge sealing of the battery II in the glue avoiding groove 131 can be ensured, and the sealing performance of the battery can be ensured.

The shape of the heat conductive silica gel 14 is T-shaped, and the heat conductive silica gel 14 is made of an elastic conductive material or a material with a low expansion rate. The shape of screw 111 is the U type for fixed head monomer 1, and screw 111 includes screw and lower screw, and the length of going up the screw is greater than the length of screw down, goes up screw and screw intercommunication down. The glue avoiding grooves 131 are T-shaped, and the distance between every two glue avoiding grooves 131 is 90-150 mm. The depth M of the glue avoiding groove 131 is smaller than the height of the seal head main body 13, the depth Q of the glue avoiding groove 131 is 1/5-1/4 of the depth M, and the range of the depth M is 50-100 mm. The width K of the glue avoiding groove 131 is set to be 2 mm-3 mm, and the width L of the glue avoiding groove 131 is set to be 4 mm-5 mm. The height of the limiting block 132 is 70% -80% of the height of the double-layer aluminum-plastic film, wherein the height range of the double-layer aluminum film is 100 um-300 um. The width W of the heat-conducting silica gel 14 is 0.1-0.2 mm smaller than the width K of the glue avoiding groove 131, and the width V of the heat-conducting silica gel 14 is 0.01-0.1 mm smaller than the width L of the glue avoiding groove 131. The height S of the heat-conducting silica gel 14 is 0.001 mm-0.01 mm larger than the depth Q of the gel avoiding groove 131, and the difference of the height R of the heat-conducting silica gel 14 is 0.001 mm-0.01 mm larger than the depth Q of the gel avoiding groove 131. Every set of head needs two head monomers 1, and two head monomers 1's length, width will be unanimous, and two head monomers 1 are the installation in opposite directions, and the bellied stopper 132 that sets up on two head monomers 1 must be able to contact each other on two head main parts 13 when equipment work.

Compared with the end socket experiment with the glue avoiding groove and the end socket experiment without the glue avoiding groove, the following information can be obtained:

serial number

Categories

Encapsulation time

Encapsulation pressure

Melt condition

End socket life

Remarks for note

1

Comparative group 1

3S

0.2Mpa

Difference (D)

/

Non-groove end socket

2

Comparative group 2

3S

0.6Mpa

Is poor

/

Non-groove end socket

3

Comparative group 3

5S

0.2Mpa

Is preferably used

19627

Non-groove end socket

4

Experiment 1

3S

0.2Mpa

Is preferably used

120072

Slotted head

5

Experiment 2

3S

0.6Mpa

Good taste

119008

Slotted head

6

Experiment 3

5S

0.2Mpa

Good taste

48991

Slotted head

Wherein, the service life of the end socket is calculated according to the number of the practically produced good batteries; the comparative group 1 and the comparative group 2 could not be manufactured because the product was not qualified, and it can be seen that: the length of the packaging time has great influence on the service life of the end socket; the influence of the packaging pressure on the service life of the end socket is small, and the production efficiency can be effectively improved by using the structure of the invention.

Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.