KR200199351Y1 - Bobbin typed lithium electric cell - Google Patents

Abstract

The present invention is to provide a bobbin-type lithium battery for the purpose of absolute reduction of the failure rate, maintenance of performance and improvement of assemblability through the prevention of damage to the bottom and side insulating paper and lithium when assembling, by inserting lithium into the inner peripheral surface of the case In a lithium battery assembled by inserting a carbon tube so as to be in close contact with the inner side of lithium and insulated with side insulating paper and the case with bottom insulating paper, the ring-shaped upper frame 11 and the center of the upper surface of which the empty space for inserting the carbon tube is centered Lithium contact frame provided with teeth 17 on the outer surface of the column 14 connected to the pillars 12 formed at circumferential intervals between the bottom booths 12 instead of the bottom insulating paper on which the carbon tube holder 16 was formed. 13, 13 ') is a lithium battery characterized by covering the side insulating paper 4 and the lithium (2) in turn on the outer surface of the synthetic resin negative electrode case (10) formed in the case (1).

Description

Bobbin type lithium battery

The present invention relates to a bobbin-type lithium battery for the purpose of absolute reduction of the failure rate, maintaining the performance, and assembling performance through the prevention of damage to the bottom insulating paper and side insulating paper and lithium when assembling.

In accordance with the trend of small size and light weight due to the convenience of portable electronic and electronic devices, the technology of the battery field has been remarkably developed, and high energy high density battery is absolutely necessary to achieve light and small size of electric and electronic equipment. In line with such a trend, a lithium battery has been proposed.

The energy density of a primary lithium battery using lithium as a negative electrode greatly depends on the positive electrode active material. For example, lithium / thionyl chloride (Li / SOCI ₂ ) batteries used in radios and the like have high energy density, flat operating voltage, excellent low-temperature performance and long-term storage performance.

There are various types of lithium batteries according to the types of internal components, and bobbin type lithium batteries are one of them. As shown in FIG. 1, a bobbin-type lithium battery has a lithium-pole having a -pole inside the case 1 and placed in the inner surface of the case 1 to be in close contact with the cathode wire 6 of the case 1. The inner peripheral surface is fixed at one point, and the bottom of the inner case 1 of the lithium 2 is covered with a bottom insulating paper 3 and then the + pole carbon tube 5 wound with the side insulating paper 4 in the lithium 2. In the center of the carbon pipe 5, the upper plate 20 is covered with the anode wire 7 provided with the insulation chamber 21 on the head base 8.

Lithium batteries having such a structure are wrinkled by the edges of the bottom insulating paper because the diameter of the bottom insulating paper is larger than the inner diameter of the lithium. This wrinkle of the bottom insulating paper not only prevents the proper insertion of the side insulating paper, but also interferes with the flow of +-current in the area, causing the battery to degrade.

In addition, when the carbon tube is inserted, there is a tendency that the side insulating paper is caught on the lower edge thereof and comes down, and when assembled in this state, the side insulating paper is wrinkled and torn, and thus the insulation between the lithium and carbon tubes is low. If the insulation function between lithium and carbon tube is deteriorated, voltage is not constant and life is shortened.

The present invention is to provide a bobbin-type lithium battery that improves the assembly and the absolute reduction of the failure rate and maintain performance through the prevention of damage to the bottom and side insulating paper and lithium during assembly.

The lithium battery of the present invention is a circular bottom booth of the bottom insulation paper band, and at the upper edge of the bottom booth, a column is formed at every equal circumference to facilitate communication between the positive and negative poles between the pillars, and a ring-shaped upper ring is integrated at the top of the pillar. By inserting a bobbin-type carbon tube into the formed synthetic resin negative electrode case, covering the outer side of the negative electrode case with a side insulating paper, and then covering it with lithium to embed it in the case, the insulation deterioration and capacity reduction factors due to the shape change or breakage of the side insulating paper are reduced. It is completely removed and the assembly is improved.

1 is a longitudinal cross-sectional view of a conventional bobbin-type lithium battery

2 is a perspective view of a cathode case according to the present invention

3 is a longitudinal cross-sectional view of a bobbin type lithium battery assembled using the negative electrode case;

<Description of the symbols for the main parts of the drawings>

1: case 2: lithium

4 side insulating paper 5 carbon tube

10: cathode case 11: Whitte

12: low boot 13,13 ': lithium contact frame

14: pillar 15: communicator

16: carbon tube holder 17: toothed

In FIG. 2, the cathode case 10 is insulated from the lithium 2 and the carbon tube 5 at regular intervals, and has a circular ring-shaped upper frame 11 and a circular bottom having the same radius as the upper frame 11. The pillars 14 are erected between the rims 12 and the circumference is divided into equal parts, and the lithium contact frames 13 and 13 'are integrally formed on the outer surface of the column 14 at the same height, and the lithium contact frames 13 13 ') is a circular net tube formed with a longitudinal tooth 17. As shown in FIG. The wide space secured to the pillar 14 is a communication hole 15 through which the anode and the cathode communicate.

The upper part of the upper frame (11) is a plate-ring shape emptied to the size that the carbon pipe (5) is easy to enter, and the carbon tube rack for positioning the carbon pipe by inserting the hollow bottom of the carbon pipe in the center of the upper surface of the cathode case (10) Protrude 16.

The upper lithium contact frame 13 has a side insulating sheet covering the outer surface of the negative electrode case 10 with the lower lithium contact frame 13 'side through the longitudinal groove 19 between the communication hole 15 and the teeth 17. Make it work smoothly.

The pillars 14 have concentric circles with a radius smaller than those of the upper frame 11 and the lower frame 12 so as to have a step therebetween so as to cover the side insulating paper and the lithium between the upper frame 11 and the lower frame 12. do. The step is equal to the sum of the side insulating paper and the thickness of lithium.

At one point of the main surface of the upper frame 11, a negative electrode lead groove 18 is formed to sandwich the negative electrode lead derived from lithium, thereby making it easy to be in close contact with the inner surface of the case.

In FIG. 3, the side insulating paper 4 is wrapped around the outer side of the negative electrode case 10, and lithium 2 is coated on the outer side of the side insulating paper 4, and then the carbon tube 5 is inserted into the negative case 10. It is placed in the case 1.

The upper plate 20 is covered with the anode line 7 provided with the insulation chamber 21 on the head base 8 on the cathode case 10.

As described above, the lithium battery of the present invention wraps the side insulating paper on the outside of the bottom plate-integrated negative electrode case replacing the bottom insulating paper, and covers the surface of the side insulating paper with lithium to be embedded in the case. There is no risk of wrinkles and side insulating paper being wrinkled or damaged, and the carbon tube is located in the center of the cathode case, and the side insulating sheet maintains the correct posture to provide a high performance lithium battery until the end of its service life. In addition, it is possible to assemble a Reit battery quickly and easily.

Claims (1)

Lithium battery assembled by inserting lithium in close contact with the inner circumferential surface of the case and inserting the carbon tube so that the inside of the lithium is insulated with side insulating paper and the case is insulated with bottom insulating paper. Between the top frame 11 and the bottom frame 12 instead of the bottom insulation paper formed with a carbon pipe holder 16 formed at the center of the bottom frame, a column 14 formed at equal intervals is connected. 17 is embedded in the case 1 by covering the side insulating paper 4 and the lithium 5 in turn on the outer surface of the negative electrode case 10 made of a synthetic resin in which the lithium contact frames 13 and 13 'are formed. Lithium battery.