RU2507642C2 - Thermal chemical source of current - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: body of a thermal chemical source of current comprises two diametrically arranged compartments with blocks of electrochemical elements placed into them, which are electrically not connected to each other and receive initiating pulses from an ignition device, enclosed into a cylindrical shell directed with an open end towards a flame force splitter, made in the form of a triangular prism, installed in the centre on a metal partition that separates compartments, at the same time the sharp angle between the faces of the prism facing towards the ignition device makes (70-80)°. Positive effect may be increased by making several compartments at one level relative to the base of the body. In this case the flame force splitter shall have the form of a pyramid with the number of faces corresponding to the number of compartments. At the same time the angle of the pyramid top facing the ignition device corresponds to the above.

EFFECT: increased reliability of operation and reduced time of process stabilisation.

1 dwg

Description

The present invention relates to the electrical industry, can be used in the production of thermal chemical current sources.

Known thermal chemical current source containing placed in the housing and sealed by a lid block, recruited from sequentially located electrochemical elements and pyrotechnic heaters, ignited from the ignition device located at the base of the housing [RU No. 2091918 C1, class. H01M 6/36, dated September 27, 1997].

This current source has a low electric capacitance, due to the limited number of electrochemical cells that can be placed in one housing. This, in turn, determines the limitations of its operational capabilities.

The closest in technical essence and the achieved results is a thermal chemical current source [F.I. Kukoz et al. Thermal chemical current sources, p.118, Rostov University Press, 1989], containing a block placed in a case and sealed with a lid recruited from sequentially located electrochemical elements and pyrotechnic heaters ignited from the ignition device.

To increase the electric capacitance, several blocks of electrochemical elements united by a single energy circuit can be placed in one housing.

Placing the blocks in a single housing and combining them with a single energy circuit reduces the reliability of the current source, since the failure of one of the blocks leads to a failure of the current source itself. In addition, such a current source has an overestimated time to reach the operating mode and limited use.

The purpose of the proposed technical solution is to increase reliability, reduce the time to enter the regime and expand operational capabilities.

For this purpose, a thermal chemical current source is proposed, comprising a block placed in a housing and sealed by a lid, composed of successive electrochemical elements and pyrotechnic heaters ignited from an ignition device installed at the base of the housing, characterized in that the housing contains two diametrically located compartments with in them by blocks of electrochemical elements not electrically connected to each other and receiving an initiating impulse from the ignition device of a solid enclosed in an electrical insulating sheath, open end directed to the flame beam divider, made in the form of a triangular prism mounted in the center on a metal partition separating the compartments, while the acute angle between the faces of the prism facing the ignition device is (70-80 ) °.

The positive effect can be enhanced by performing at the same level with respect to the base of the housing of several compartments. In this case, the flame force divider should have the shape of a pyramid with the number of faces corresponding to the number of compartments. The angle of the top of the pyramid facing the ignition device corresponds to the above range.

The execution in one housing of two or more compartments with electrically independent blocks of electrochemical elements placed in them, brought into operation from one ignition device, increases the reliability of the current source. By reducing the size while maintaining an electrical capacity comparable with the prototype, the time to exit to the operating mode is reduced. Expanding operational capabilities, since energy can be removed both from each block of electrochemical elements, and by connecting them in various combinations outside the current source in a single electrical circuit.

The insulating shell into which the ignition device is placed does not allow the particles of the force of flame to dissipate and thereby cool along the external structural elements connecting the ignition device and the power source housing. The force of flame in an organized stream is directed to the divider.

The angle between the faces of the prism in the range (70-80) ° is determined by the need to divide the force of the flame from the ignition device into two diametrically directed flows and direct them to the channels made in the base of the housing and connecting the ignition device to the compartments without loss of thermal energy.

When the angles of the divider are more or less than the limits of the selected range, not all heated particles of the flow are directed towards the compartments, because of which there is a loss of their thermal energy. As a result, the reliability of arson of pyrotechnic heaters of the block of electrochemical elements decreases.

Figure 1 shows the proposed current source. In the housing 1 there are two compartments 2, in which are placed the blocks assembled on the cover 3, consisting of sequentially located electrochemical elements 4 and pyrotechnic heaters 5, the ignition of which is carried out from the ignition device 6, placed in an insulating shell 7.

When initiating the ignition device, the force of the flame enters the divider of the force of flame 8, mounted in the center of the metal wall 9 that separates the compartments. After the divider, the force flame is divided into two diametrical streams, which are directed through the channels 10 made in the base 11 of the housing into the ignition channels of the blocks 12, setting fire to pyrotechnic heaters.

Blocks can be made without ignition channels. In this case, pyrotechnic strips are laid in the channels of the base of the casing, which transmit a heat pulse to the same strips laid along the side surface of the blocks.

To reduce heat loss, the blocks are surrounded by thermal insulation 13.

The voltage from the blocks is removed by means of current outputs 14 made on the cover of each block. Thus, the electrical circuits of the blocks inside the current source case are not interconnected and can power different energy consumers. If necessary, the electrical terminals of the blocks can be switched taking into account the consumer of electrical energy outside the housing of the current source.

Claims (1)

 A thermal chemical current source comprising a block sealed by a cover placed in a housing, recruited from sequentially arranged electrochemical elements and pyrotechnic heaters, ignited from the ignition device installed at the base of the housing, characterized in that the housing contains two diametrically located compartments with the blocks of electrochemical elements placed in them not electrically connected to each other, and receiving an initiating impulse from an ignition device enclosed in a cylinder an electric insulating sheath, open end directed to the flame head divider, made in the form of a triangular prism mounted in the center on a metal partition separating the compartments, while the acute angle between the faces of the prism facing the ignition device is (70-80) °.