TW201312832A - Secondary battery structure and manufacturing method thereof - Google Patents

Abstract

The present invention provides a secondary battery structure and manufacturing method thereof, which is first to cut the integrally formed electrode ear portions onto a positive electrode sheet and a negative electrode sheet; stacking a set of electric core sheets separated by isolation films to be wound on a core shaft to form an electric core having both ends configured with a plurality of electrode ear portions, such that the electrode ear portions at both ends may respectively form the two positive and negative electrodes; fixing two collector plates on the electrode ear portions at both ends; covering the two collector plates to only expose the conductive bar on the collector plates; using adhesive tape to fix the two collector plates for isolation to be respectively attached on the electrode ear portions at both ends; accommodating the electric core in a shell having one end as an closed and the other end as an opened end, in which an opening on the closed end may be penetrated by the conductive bar, and the opened end at the other end may be joined with a cap, which is configured with a hole to be penetrated by the conductive bar; finally, locking two terminal locks respectively on the conductive bar. The present invention may provide a stronger structure and may employ automated process to fast assemble the secondary battery.

Description

Secondary battery structure and manufacturing method thereof

The present invention relates to a secondary battery, and more particularly to a secondary battery structure of a battery that can be automated and quickly fabricated, and a method of manufacturing the same.

Battery, the old and narrow definition is the device that converts the stored chemical energy into electrical energy. The newer and broadly defined definition refers to the device that converts energy other than mechanical energy into electrical energy, that is, our conventional hair. Motor. However, because the traditional primary battery has been gradually eliminated due to its high pollution and irreusability, it has become a reusable and easily recyclable secondary battery, which has become the main source of various electric power.

As shown in the first figure, the structure of the conventional secondary battery is as shown in the figure. As shown in the figure, the ear portion 10 is additionally processed and welded to the battery core 12, and then one of the roots is inserted into the connecting guide 14 to utilize a conductive The terminal 16 locks the guiding rod 14 for fixing the tab portion 10, and then inserts an inner insulating gasket 18 and an end cap 20 on the conductive terminal 16, and the two ends of the housing 22 are closed by the two end caps 20; In addition, an outer insulating gasket 24 is inserted into the conductive terminal 16 protruding from the housing 22, and the conductive terminal 16 is locked by an outer nut 26, and the end cover 20 is tightened by rotating the outer nut 26. It is tightly coupled with the housing 22 and presses the through-holes of the inner insulating gasket 18 and the outer insulating gasket 24 to the airtight end cap 20 to avoid the possibility of the battery core 12 being deformed due to air permeation.

Due to the large number of components in the conventional secondary battery, it is easy to cause complicated processes in the assembly of the secondary battery, which is very time consuming and has the problem of assembly errors. Moreover, the guide rod 14 is slender and insufficient in strength, and once the personnel apply force, It is easy to cause the guide rod 14 to break, and there is a possibility that the conductive terminal 16 is displaced, and it is easy to make the secondary battery intolerant for long-term use, and there is a concern that the electrolyte leaks.

In view of the above, the present invention has been made in view of the above problems, and proposes a modification of a secondary battery structure and a manufacturing method to effectively solve the conventional problems.

SUMMARY OF THE INVENTION The main object of the present invention is to provide a secondary battery structure and a method of manufacturing the same, which have few parts, simple structure, can be automatically manufactured, and can be quickly assembled to save time and cost.

Another object of the present invention is to provide a secondary battery structure and a method of manufacturing the same, which can provide a tough secondary battery structure, which is less likely to damage components during assembly, and provides a more durable secondary battery.

In order to achieve the above object, the present invention provides a secondary battery structure, which is a shaft core, a core is wound on the shaft core, and two ends are integrally formed with the ear portions, and the ear portions at both ends can be divided into The first pole portion of the positive pole and the second pole portion of the negative pole end are provided with two collector plates at both ends of the battery core, and the collector disk is covered by the ear portion to expose a guide rod portion, and the second conductive portion The disc is attached to the ear portion, and a through hole is formed in the center of the conductive disc, so that the guide portion can be passed through, and a casing has a closed end at one end and an open end at the other end, and the battery is placed in the housing. The closed end is provided with an opening for allowing the guide portion to pass through the opening, and the open end is provided with a cover body, and a hole is provided for the guide portion to pass through, and the two terminal locks are respectively locked to the guide portion. on.

In addition, the present invention also provides a method for manufacturing a secondary battery, which first cuts an integrally formed ear portion to a positive electrode sheet and a negative electrode sheet; and laminates a positive electrode sheet, at least two separator films, and a negative electrode sheet to form a set of electricity. a chip; the electric chip is wound on a mandrel to form a battery core having a plurality of ear portions at both ends; the two current collector plates are fixed at both ends of the mandrel; and the ear portions at both ends of the mandrel are respectively covered Folding on the collector plate and exposing a guide rod portion; pasting at least two conductive plates on the ear portions of the both ends, and allowing the guide rod portion to pass through the conductive plate and being insulated by tape; a housing, and the guide rod portion is pierced by the closed end of the housing; the cover is covered by a cover body, and the guide handle portion can also be passed out by the cover body and engage the cover body in the housing; and the lock The upper two terminals are locked to the guide portion.

The purpose, technical content, features and effects achieved by the present invention will be more readily understood by the detailed description of the embodiments.

The present invention provides a structure and an element which can automatically assemble a secondary battery and provide a strong toughness, can be quickly installed during assembly, and is less likely to damage components, and provides a more durable secondary battery.

Referring to the second, third, and fourth drawings, each of which is a perspective view, an exploded view, and a cross-sectional view of the present invention. As shown in the figure, the present invention is composed of a mandrel 32. An iron ring can be added to both ends of the mandrel 32 to enhance the strength of the mandrel 32. The cell 34 is separated by a positive electrode, at least two separators and a negative electrode. The first tab portion 340 and the second tab portion 342 are integrally formed on the opposite sides of the positive electrode tab and the negative electrode tab, and the first tab portion 340 and the second tab portion are formed. The portions 342 are respectively located at two ends of the battery core 34 as two electrodes; two collector plates 36 are disposed at both ends of the mandrel 32, and the collector plate 36 is covered by the ear portions, and only one of the collector plates is exposed. The guiding portion 360, the two conductive discs 38 are attached to the ear portions, and a through hole 380 is formed in the center, so that the guiding portion 360 can be pierced by the through hole 380. The insulating disk 38 is provided with an insulating ring 382. The insulating ring 382 is provided with at least one liquid inlet hole 3820. Since the liquid inlet hole 3820 is a channel for injecting the conductive liquid of the battery, it is necessary to ensure that the liquid inlet hole 3820 is not blocked by the ear portion and keep the liquid inlet hole 3820 unobstructed; At least two insulating sheets 40 are respectively disposed on the two conductive pads 38; and a housing 42 having a closed end 420 at one end and an open end at the other end 422, the housing 42 can accommodate the battery core 34, and the opening end 420 is provided with an opening 4202. When the battery core 34 is inserted into the housing 42, the guiding portion 360 can be passed through the opening 4202; The body 44 is disposed at the open end 422, and the cover 44 is provided with a hole 440. The cover 44 is integrally formed with a safety valve 442 and at least one liquid injection hole 444. The safety valve 442 can be vented to avoid installation. When the gas pressure in the casing 42 is too large, the liquid inlet hole 3820 should be aligned with the liquid injection hole 444, so that the conductive liquid can be injected into the casing 42, and the cover body 44 and the closed end 420 are provided with a second ring protrusion 446, which can be strengthened. Structural strength. The two-terminal lock 46 is fastened to the guide portion 360 on both sides of the secondary battery 30. The guide portion 360 is provided with a thread corresponding to the terminal lock 46, and can be coupled with the terminal lock 46, and the terminal lock 46 is locked. In the ring protrusion 446, an insulating rubber 48 may be further disposed in the ring protrusion 446 to fix the terminal lock 46 and simultaneously strengthen the overall structure.

After the structure of the present invention is described, a schematic structural view of each step of fabricating the secondary battery of the present invention will be described. Referring to FIGS. 5A to 5I, first, as shown in FIG. 5A, the cutting is integrally formed. The ear portion is on a positive electrode tab 3422 and a negative electrode tab 3442. Next, as shown in FIG. 5B, the positive electrode tab 3422 and the negative electrode tab 3442 are separated by a positive lamination method of a positive electrode tab 3422, at least two separator films 346, and a negative electrode tab 3442 to form a group of electric chips 348. As shown in FIG. 5C, the laminated electrical chip 348 is wound on a mandrel 32 to form a battery core 34 having a plurality of tab portions at both ends, that is, formed on both sides of the battery core. The first pole portion 340 and the second pole portion 342 are formed to form two electrodes; in the fifth D diagram, the tab portion is spread out, and one end of the mandrel 32 is exposed and a collector disk 36 is fixed to the core. One end of the shaft 32, as shown in FIG. E, and the portion of the tab portion near the collector plate 36 is folded in, and the tab portion is folded outward into the cover collector disk 36, and a guide handle is exposed. After the portion 360, a current collecting tray 36 is fixed to the other end of the mandrel 32, wherein the steps are the same as those of the fixed collecting tray 36, so the description is not repeated; then, refer to the fifth F-picture, which is attached to at least two conductive pads. 38 is on the ear portions of the two ends, and the guiding portion 360 can be pierced by the conductive plate 38. The conductive plate 38 can be adhered by tape or other insulating material to insulate and fix the conductive plate 38, and the two insulating sheets are placed on the conductive plate 38. on. Next, as shown in the fifth G diagram, the battery core 34 is housed in the housing 42 and the guide portion 360 is passed out of the closed end 420 of the housing 42. In the fifth H-picture, the cover 44 is closed and The guide portion 360 is pierced by the cover 44 and engages the cover 44 and the housing 42. The cover 44 and the housing 42 can be joined by laser or spot welding. Finally, please refer to FIG. The handle 360 is locked with a two-terminal lock 46. When the lock terminal 46 is locked, one end of the terminal is locked, so as to prevent the battery core 34 from rotating as a whole when the terminal lock 46 is locked, thereby causing damage to the battery core 34 or two terminals. The lock 46 is adjusted correspondingly in the opposite direction of rotation, and the rotation of the battery core 34 can be prevented from being damaged. Finally, the insulating glue is poured into the ring protrusion 446 to fix the terminal lock 46 to strengthen the overall structure of the secondary battery.

In summary, the invention has fewer parts and simple structure, can effectively accelerate assembly speed and save time cost, and the ear portion is integrally formed with the electric core, and no additional welding is required, so that the structure is simpler and more simple. Convenient to provide automated processes, no need to spend extra manpower.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, any changes or modifications of the features and spirits of the present invention should be included in the scope of the present invention.

10. . . Ear

12. . . Batteries

14. . . Guide rod

16. . . Conductive terminal

18. . . Inner insulating washer

20. . . End cap

twenty two. . . case

twenty four. . . Outer insulation washer

26. . . Outer nut

30. . . Secondary battery

32. . . Mandrel

34. . . Batteries

36. . . Collector disk

38. . . Conductive disk

40. . . Insulating sheet

42. . . case

44. . . Cover

46. . . Terminal lock

48. . . Insulating glue

340. . . First ear

342. . . Second ear

3422. . . Positive electrode

3442. . . Negative electrode sheet

346. . . Isolation film

348. . . Electric chip

360. . . Guide handle

380. . . perforation

382. . . Insulation ring

420. . . Closed end

422. . . Open end

440. . . Hole

446. . . Annulus

3820. . . Liquid inlet

4202. . . Opening

The first figure is a schematic structural view of a conventional secondary battery.

The second drawing is a perspective view of an embodiment of the invention.

The third figure is an exploded view of an embodiment of the present invention.

The fourth figure is a schematic cross-sectional view of an embodiment of the present invention.

The fifth to fifth I diagrams are schematic structural views of the steps of fabricating the secondary battery of the present invention.

30. . . Secondary battery

32. . . Mandrel

34. . . Batteries

36. . . Collector disk

38. . . Conductive disk

40. . . Insulating sheet

42. . . case

44. . . Cover

46. . . Terminal lock

48. . . Insulating glue

340. . . First ear

342. . . Second ear

360. . . Guide handle

380. . . perforation

382. . . Insulation ring

420. . . Closed end

422. . . Open end

440. . . Opening

442. . . Safety valve

444. . . Injection hole

446. . . Annulus

3820. . . Liquid inlet

Claims (12)

The structure of a secondary battery comprises: a mandrel; an electric core wound on the mandrel, and a plurality of integrally formed ear portions are arranged at both ends, and the ear portions at both ends can be divided into a first pole portion of the positive pole and a second pole portion of the negative pole end; two collector disks are disposed at both ends of the mandrel, and the collector pan is covered by the ear portion, and a guide is exposed a shank; a second conductive plate, which is attached to the pole portion, and a through hole is formed in the center of the conductive plate, so that the guide portion can be pierced by the through hole; a casing accommodating the battery core One end is a closed end, and the other end is an open end. The closed end is provided with an opening for allowing the guide portion to pass through the opening; a cover is disposed at the open end, and the cover is disposed on the cover A hole is provided to allow the guide portion to pass through; and a two-terminal lock can be respectively locked to the guide portion. The structure of the secondary battery of claim 1, further comprising at least two insulating sheets respectively disposed on the conductive pads. The structure of the secondary battery of claim 1, wherein the outer edge of the conductive pad is provided with an insulating ring, and the insulating ring is provided with at least one liquid inlet. The structure of the secondary battery of claim 3, wherein the cover system is provided with a one-piece safety valve integrally formed and at least one liquid injection hole, wherein the liquid injection hole is aligned with the liquid inlet hole. The structure of the secondary battery of claim 1, wherein a ring protrusion is formed on the cover body and the outer side of the closed end. The structure of the secondary battery according to claim 5, further comprising at least two insulating glues respectively disposed in the annular protrusion. The structure of the secondary battery according to claim 1, wherein the battery core is formed by laminating a positive electrode sheet, at least two separator films, and a negative electrode sheet. A method for manufacturing a secondary battery, comprising: cutting a positive electrode sheet and a negative electrode sheet, cutting out the integrally formed ear portion; laminating the positive electrode sheet, at least two separator films, and the negative electrode sheet to form a set of electric chips; The electric chip is wound on the mandrel to form a battery core with a plurality of the ear portions at both ends; the two current collecting plates are fixed at two ends of a mandrel, and the tabs of the battery core are The portions are respectively folded onto the current collecting plate and exposed with a guiding portion; at least two conductive plates are adhered to the tab portions at both ends, and the guiding portion can pass through the conductive plate and is insulated by an insulating material Fixing the conductive disk; loading the battery core into a casing, and allowing the guide portion on the current collecting plate to pass through the closed end of the casing; a cover body covers the casing, and the guiding handle The cover is passed through the cover and engages the cover and the housing; and the two terminal locks are locked on the guide portion. The method of fabricating a secondary battery according to claim 8, wherein the cover and the housing are joined, and the cover and the housing can be joined by laser or spot welding. The method for manufacturing a secondary battery according to claim 8, wherein the tab portion is folded onto the current collecting tray, and is first folded into a tab portion adjacent to the current collecting tray, and then folded outwardly to wrap the outer battery. Collector disk. The method for manufacturing a secondary battery according to claim 8, wherein the second terminal of the terminal is filled with an insulating glue to fix the terminal lock. The method of manufacturing a secondary battery according to claim 8, wherein after the conductive disk is fixedly insulated, two insulating sheets are placed on the conductive disk.