RU2025834C1 - Stand-by chemical current source - Google Patents

Abstract

FIELD: electrical engineering, electronics. SUBSTANCE: heterpolar electrodes 3 isolated with separators 4 are mounted in metal case 1. Electrolyte 5 is contained in pores of electrodes 3 and separators 4. Case 1 is closed with cover 6 with cap 7 having recession 8 directed inwards the case. Cover 6 is insulated from case 1 with plastic sealing gasket 10. Side wall of case 1 has radial shelf 2. Gasket 10 is interference fitted between recession 8 of cover 6 and shelf 2 of case 1. EFFECT: enhanced reliability of sealing. 1 dwg

Description

 The invention relates to the electrical industry and relates to the construction of chemical current sources, namely sealed alkaline batteries of disk and cylindrical shape.

 A known battery design containing electrodes separated by a separator, an electrolyte, a housing, a flat-shaped cover and a plastic sealing gasket located between the housing and the cover [1]. Sealing the battery is achieved by compressing the plastic gasket between the wall of the housing and the cover.

 This design has a significant drawback, consisting in the fact that the gasket seal area between the housing and the cover is too small, the battery tightness is insufficient and electrolyte leakage is observed.

 The closest to the invention in technical essence and the achieved result is the design of a sealed chemical current source, containing bipolar electrodes separated by a separator, an electrolyte, a housing with a zig or ledge on the side wall, a cap with a cap and a recess directed into the housing, and a plastic gasket, located between the housing and the cover and passing between the recess of the cover and the ridge or ledge of the housing [2]. The recess in the cover serves to fix the valve, while the height of the recess does not exceed the thickness of the material from which the cover is made.

 However, this design of the battery also has a drawback inherent in the analogue, since in this case the seal area of the gasket between the housing and the cover remains insufficient, and the tightness of the current sources is unreliable, which manifests itself in the leakage of electrolyte.

 The problem that the invention solves is to create a battery design with a reliable body sealing assembly with a cover preventing electrolyte leakage.

 The solution to this problem lies in the fact that in the design of a sealed chemical current source containing bipolar electrodes separated by a separator, an electrolyte, a housing with a zig or ledge on the side wall, a cap with a cap and a recess directed into the housing, and a plastic gasket located between the housing and the lid and passing between the recess of the lid and the zig or ledge of the housing, the gasket in the area between the recess of the lid and the zig or ledge of the housing is installed with an interference fit.

 A comparative analysis of the proposed solution with the prototype shows that the claimed design differs from the known one in that the gasket in the area between the lid recess and the zig or ledge of the housing is installed with an interference fit. Thus, the claimed design meets the condition of patentability "novelty."

 Comparison of the proposed solutions with other technical solutions in this technical field did not reveal similar publicly available sources, which allows us to conclude that the proposed solution corresponds to the level of patentability of the invention "inventive step".

 The drawing shows a sealed chemical current source in the context.

 In the metal case 1, having a radial zig 2, electrodes 3 and separators 4 are installed, in the pores of which an electrolyte 5 is placed. On top there is a cover 6 with a cap 7. There is a recess 8 in the cover, which is directed inside the case 1, which serves to fix the valve 9, pressed up by a cap 7. Between the cover 6 and the housing 1 is placed a plastic gasket 10 that insulates the housing from the cover. A design feature is that the gasket 10 in section A between the recess 8 of the cover and the zig (or ledge of the housing) 2 is installed with an interference fit, thus creating an additional sealing section of the gasket 10, thereby increasing the reliability of sealing the current source, while the prototype gasket 10 sealed only at the edge of the lid in area B.

 To confirm the feasibility of the proposed design, prototypes of sealed nickel-cadmium batteries TsNK-0.6 were made. The case, electrodes, separator, electrolyte, cap, valve were used from the TsNK-0.6 accumulator commercially available from Rigel JSC. Case dimensions: height 53 mm, diameter 13.9 mm, wall thickness 0.4 mm. Electrodes in the form of pressed briquettes made of nickel and cadmium hydroxide. Separator from polypropylene fabric 0.3 mm thick. The cap had a height of 2.9 mm, a diameter of 11 mm, and a material thickness of 0.4 mm. The test lid had a height of 2 mm, a diameter of 12.2 mm, a recess in the lid of 1.1 mm, an outer diameter of the recess of 8.7 mm. The valve is made of rubber - diameter 4 mm, height (before pressing in the cover) 6 mm. The experimental polyamide gasket had an outer diameter (at the ridge of the housing) of 10.9 mm, an inner diameter at the recess in the lid of 8.7 mm. The inner diameter of the body at the ridge site was 10.9 mm. Thus, there were no gaps between the body zig, the gasket, and the recess in the lid and the gasket was installed with an interference fit.

 At the same time, serial batteries manufactured in accordance with the prototype were taken for testing. Unlike the experimental ones, these batteries had an outer diameter of the recess in the lid of 8.3 mm, and the gasket had an outer diameter at the ridge of 10.5 mm and an inner diameter of 9.9 mm. Thus, between the zig and the gasket there was a radial clearance (10.9 - 10.5): 2 = 0.2 mm, and between the gasket and the recess in the lid - (9.9--8.3): 2 = 0.8 mm

 Comparative tests have shown that batteries made in accordance with the prototype have 10% rejects due to electrolyte leakage. Experienced batteries were completely defective.

 Thus, the required quality of current sources is provided only by such a design that meets the distinctive features of the invention. The foregoing allows us to conclude that there is a condition for patentability of the proposed solution "industrial applicability". Using the proposed design allows you to create the production of current sources, characterized by high reliability.

Claims (1)

 A SEALED CHEMICAL CURRENT SOURCE, containing bipolar electrodes separated by a separator, an electrolyte, a housing with a zig or ledge on the side wall, a cap with a cap and a recess directed into the housing, and a plastic gasket located between the housing and the cap and passing between the cap recess and the zig or a ledge of the housing, characterized in that the gasket in the area between the recess of the lid and the zig or ledge of the housing is installed with an interference fit.