RU218024U1 - THERMAL CHEMICAL CURRENT SOURCE - Google Patents

Abstract

The utility model relates to thermal chemical current sources (TCSS) with increased reliability of activation and operation under conditions of a limited time interval. The technical result of the utility model is to increase the reliability of the activation of the HPIT under the influence of high-intensity overloads, which is ensured by the fact that the electrode blocks placed in the housing are combined into a single electrical circuit by means of a conductive plate laid in a groove made between the matrix compartments, and their activation is carried out by means of pyrotechnic cords fixed in the grooves of the matrix on the side surface of the electrode blocks connected to the ignition device located at the base of the matrix, while the pyrotechnic cords are additionally fixed in the grooves of the matrix with a heat shrink tube, which reliably presses them to the side surface of the electrode blocks, preventing them bends, fractures and breaks when exposed to high-intensity overload, and this, in turn, ensures reliable transmission of the fire impulse to pyrotechnic heaters. 1 ill.

Description

The utility model relates to thermal chemical current sources (TCSS) with increased reliability of activation and operation under high intensity overload conditions.

Known thermal battery (RF Patent 2457586, publ. 27.07.2012, IPC H01M 6/20, H01M 10/39), containing a housing with thermal insulation and external current leads from two or more electrically connected in parallel, located one after another on a central insulated rod blocks elements of thermally activated chemical current sources, each of which consists of a cathode, an electrolyte and an anode and alternates sequentially in the axial direction with pyroheating elements. In addition, the battery contains central cathode and anode current collectors, covering the central insulated rod and fixed on the corresponding current collectors of the external current leads and the current collectors of the block of elements of thermally activated chemical current sources, which is the most remote from the external current leads, as well as clamping elements of the blocks. At the same time, the clamping elements of the blocks are made in the form of sealed bellows with internal stops.

Known thermal chemical current source (Patent RU No. 2683585, published 03/29/2019, IPC H01M 6/36, H01M 6/38, adopted as a prototype), containing a housing sealed with a lid, thermal insulation, an ignition device and blocks of electrochemical elements placed in compartments, characterized in that the compartments are made in a heat-resistant matrix fixed on the cover with a ratio of diameter and height dimensions as close as possible to unity, at a given volume, the blocks in the compartments are fixed in the radial direction by heat-insulating gaskets, and in the axial direction - by self-locking lock springs, and combined into a single electrical circuit by means of conductive plates laid in grooves made between the matrix compartments, and their activation is carried out by means of pyrotechnic cords fixed in the grooves of the matrix along the perimeter of the blocks and connected to an ignition device located at the base of the matrix.

The disadvantage of both the analogue and the prototype is the insufficient preload of the pyrotechnic cords, and therefore, when exposed to high-intensity overloads, they are deformed and ruptured.

The problem of HPIT operating under high-intensity overloads is the deformation and rupture of pyrotechnic cords, which reduces the reliability of HPIT activation.

The objective of the present utility model is to increase the reliability of activation of a THIT operating under the influence of high-intensity overloads.

The technical result of the utility model is the prevention of fractures, kinks and breaks in pyrotechnic cords under high-intensity overload conditions.

The specified technical result is provided by the design of the thermal chemical current source. The thermal chemical power source contains a housing sealed with a lid, thermal insulation, an ignition device and blocks of electrochemical elements placed in compartments, made in a heat-resistant matrix fixed on the lid, having a diameter-to-height ratio as close as possible to two at a given volume, the blocks in the compartments are fixed in the radial direction with heat-insulating spacers and are combined into a single electrical circuit by means of a conductive plate laid in a groove made between the matrix compartments, and their activation is carried out by means of pyrotechnic cords fixed in the grooves of the matrix on the side surface of the blocks connected to the ignition device located at the base of the matrix . Pyrotechnic cords are additionally fixed in the grooves of the matrix with a heat shrink tube, which securely presses them to the side surface of the electrode blocks, preventing them from bending, breaking and breaking when exposed to high-intensity overload, and this, in turn, ensures reliable transmission of the fire impulse to the pyrotechnic tablets, which means increases the reliability of THIT activation.

Thus, as a result of the action of a set of essential features of the utility model, a technical result is achieved, which consists in preventing the possibility of failure of the HPIT during activation under conditions of high-intensity overloads.

The essence of the utility model is illustrated by the drawing. In FIG. 1 shows the design of a thermal chemical current source in a longitudinal section.

1 - anode;

2 - electrolyte-depolarizer;

3 - pyrotechnic heater;

4 - electric igniter;

5 - a set of compensation pads;

6 - a set of compensation pads;

7 - a set of compensation pads;

8 - matrix;

9 - cover;

10 - pressure seals;

11 - deaf cylindrical body;

12 - electrical insulation of the inner side surface of the cylindrical body with the material "Elmicatex";

13 - pyrotechnic cord;

14 - a set of compensation gaskets;

15 - heat shrink tube;

16 - pyrotechnic cord;

17 - conductive plate;

18 - current collector of elements;

19 - a set of compensation gaskets;

20 - a set of heat and electrical insulation pads.

The thermal chemical current source contains two blocks of two or more layers of electrochemical elements installed in a heat-resistant matrix 8, pressed by a set of compensation gaskets 5 and 6. The matrix is placed in a blind cylindrical housing 11 with a cover 9, in which a set of heat and electrical insulating gaskets 20 are located Each of the layers of electrochemical cells contains sequentially alternating solid layers of the anode 1, electrolyte-depolarizer 2 and pyrotechnic heater 3, sealed leads 10 for connection with an external consumer, and an activation system. The activation system is made in the form of two pyrotechnic cords 13, installed in a special slot of the matrix and pressed to each of the blocks with a set of compensating gaskets 14 and fixed along the perimeter of the matrix with a heat shrink tube 15, a horizontal pyrotechnic cord (transmitting a fire impulse to pyrotechnic cords 13) and an electric igniter 4, fixed on the cover 9 of the deaf cylindrical body 11, between the inner side surface of the deaf cylindrical body 11 and the side surface of the electrode block, a layer of electrical insulation made of Elmicatex material 12 is tightly laid.

Thermal chemical current source works as follows. At the required moment of high-intensity mechanical overload, the heat shrink tube 15 provides reliable compression of the compensation pads 14 and the pyrotechnic cord 13 to the block of electrochemical elements, in particular to the pyrotechnic heater 3, preventing their fractures, kinks and breaks. Then the battery is activated by applying voltage to the electrodes of the electric igniter (not marked with a position) through the sealed leads 10, causing the appearance of a flame, the force of which falls on the pyrotechnic cord 16 located above the electric igniter. From the fire pulse, the pyrotechnic cord 13 is ignited. As a result, the pyrotechnic heaters 3 are activated; during combustion, they release heat to melt the electrolyte-depolarizer 2, as a result of which a voltage appears between the electrolyte-depolarizer 2 and anode 1 and an electric current begins to flow through the external circuit. current.

Claims (1)

A thermal chemical current source containing a housing sealed with a lid, thermal insulation, an ignition device and blocks of electrochemical elements placed in compartments made in a heat-resistant matrix fixed on the lid, having a diameter-to-height ratio as close as possible to two for a given volume, while the blocks in the compartments they are fixed in the radial direction with heat-insulating spacers and are combined into a single electrical circuit by means of a conductive plate laid in a groove made between the matrix compartments, and their activation is carried out by means of pyrotechnic cords fixed in the grooves of the matrix on the side surface of the electrode blocks connected to the ignition device, located at the base of the matrix, characterized in that the pyrotechnic cords are additionally fixed in the grooves of the matrix with a heat shrink tube, which securely presses them to the side surface of the electrode blocks, preventing their kinks, fractures and ruptures when exposed to high-intensity overload, and this, in turn, ensures reliable transmission of fire impulse to pyrotechnic heaters.

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