JPH01154466A - Manufacture of thermal battery - Google Patents

Abstract

PURPOSE:To increase the efficiency and to reduce the consumption of a fixture by temporarily fixing a stack by directly applying a load, then uniting it with contraining fittings. CONSTITUTION:A load is applied to a stack with an air cylinder or a press H through a pressure attachment G having an opening. Then, a temporarily fixing nut is manually fastened from the opening of the attachment G to the degree somewhat increasing resistance to temporarily fastening the stack. The load and the attachment G are removed, and heat resistant heat insulating sheet 7 such as asbestos paper and ceramic paper is wound around the stack. Plural contraining fittings are welded to the flat part of lower presser plate 1 and that of an upper presser plate 6. Fastening dimension is unnecessary to be checked, job efficiency is increased, and the damage and consumption of a fixture are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a laminated thermal battery in which unit cells and a heating agent are alternately laminated. The present invention provides a method for fixing the holder under pressure with a predetermined load using restraint fittings or heat-resistant tape.

Conventional technology As is already known, a thermal battery is a high-temperature activated battery that uses molten salt as an electrolyte, and generally consists of a cell, two heating agents, two igniters, and a heat insulator sealed in a metal container. structure, and the ignition trigger from the outside, e.g. electricity, shock,
By instantaneously applying pressure, the igniter is ignited, and the flame ignites the exothermic agent, which generates heat through combustion, heats the cell, and activates by melting the electrolyte in the cell.

It is a long-term storage battery that supplies electricity. Today, their use as a power source for flying objects such as rockets and emergency evacuation systems for aircraft pilots is increasing. Thermal batteries are often used in emergencies and under harsh conditions such as vibration and shock, so high reliability is required.

Against this background, in the manufacturing process of laminated thermal batteries, a method has often been adopted in which a predetermined load is applied to a laminate consisting mainly of a unit cell and a heat generating agent, and the laminate is fixed and integrated under the applied load. Here, a conventional fixing method will be explained with reference to FIGS. 4 and 5.

is the main body of the lamination jig, and has an axis B for lamination.
Add to this the lower presser plate 1. The lower insulation 2 is set, and then a predetermined number of heating agents 3 and unit cells 4 are alternately stacked. After the predetermined number of heating agents 3 and cells 4 are stacked, the upper insulation 5
By inserting the upper presser plate 6, a laminate is constructed. Place a spring holder C to receive a spring D to apply a predetermined pressure to the laminate on top of the upper presser plate 6, then insert the spring D and tighten the spring D to the predetermined size. Compress up to. The compression dimension of the spring D, that is, the pressurizing load, varies somewhat depending on the size of the battery and the conditions under which the battery is used, but it is usually 1.2 to 3 to 9/d for the laminate.
The compression dimension of the spring D is determined so as to achieve a predetermined pressurized load within this range. The next step is to wrap heat-resistant insulation sheets such as asbestos paper, ceramic paper, and crow cloth around the laminate.
After the laminate is integrated by welding and fixing a plurality of restraint fittings 8 to the upper and lower flat parts of the lower presser plate 1 and the upper presser plate 6, respectively, tightening is performed using nuts E and springs D.

The fixing and integration of the laminate was completed by removing the laminate jig in the following order.

The problem remaining with this method is that the heating agent 3. When tightening the spring D to compress the spring D in order to apply a predetermined load to the laminate mainly composed of the unit cell 4, proceed with the work while gradually tightening the nut E and constantly measuring the compression dimension of the spring D. This resulted in extremely poor work efficiency and severe worker fatigue. In addition, the axis B of the lamination jig
Tightening while applying a load to the threaded part of K causes severe wear and tear due to repeated work, and requires unnecessary time and money to replace or repair it from time to time. Was.

Problems to be Solved by the Invention As described above, the conventional method of integrating laminates has problems such as poor work efficiency and severe damage to the lamination jig.

The manufacturing method of the present invention is aimed at solving these problems.

Means for Solving the Problems In order to solve the problems of the conventional art, in the present invention, a spring for applying a load was incorporated directly into the lamination jig in order to apply a predetermined load. In this method, a predetermined load is directly applied to the laminate using an air cylinder 5 press or the like to temporarily fix the laminate, and then the laminate is integrated using restraint fittings or the like.

Function According to the structure of the present invention, there is no need to adjust the load by adjusting a screw when tightening, in which the load is always applied by a spring as in the conventional method. Since the predetermined load is directly applied to the laminate through the laminate and the laminate is temporarily fixed using the temporary fixing nut attached to the top of the laminate jig, it is no longer necessary to check the dimensions during tightening as in the past. Work efficiency is good, and the jig can be hardly damaged.

EXAMPLES Examples of the present invention will be described below with reference to FIGS. 1, 2, and 3. The main body of the lamination jig has a shaft B for lamination, and a lower presser plate 1. The lower insulation 2 is set, and then a predetermined number of heating agents 3 and unit cells 4 are alternately stacked. After a predetermined number of heating agents 3 and unit cells have been stacked, the upper heat insulator 6 and the upper presser plate 6 are inserted to form a laminate. Next, attach the temporary fixing nut F to the shaft B of the lamination jig, and tighten it until it tightens with little resistance. As shown in Fig. 2, the laminate set in this lamination jig is subjected to a load of 2/1 by an air cylinder or press H through a pressure attachment G having an opening. Set it as shown, apply a load, and temporarily fix the bolt (F) in that state.
Tighten manually from the H opening until you feel a slight resistance.1. Temporarily fix the laminate. Then load and attachment by air cylinder or press H)G
remove. Next, as shown in FIG. 3, a heat-resistant heat insulating sheet 7 made of asbestos paper, ceramic paper, etc. is wrapped around the laminate, and a plurality of restraint fittings 8 are welded to the upper and lower flat parts of the lower presser plate 1 and the upper presser plate 6, respectively. Fix it. In this embodiment, a method using restraining metal fittings is shown, but it is also possible to adhere and fix with a heat-resistant adhesive tape containing glass fiber. After permanently fixing the laminate in this way, temporarily fix it)
Remove the lamination jig having F and axis B. This completes the fixing and integration of the laminate.

The central hole of the laminate serves as a guide hole for the igniter. By placing this in a metal case and sealing it, a stacked battery is completed.

Table 1 is a table comparing the work efficiency and the degree of wear of the lamination jig between the conventional manufacturing method and the manufacturing method of the present invention.

Table 1 Effects of the Invention As shown in Table 1, compared to the conventional manufacturing method, the manufacturing method of the present invention has a work efficiency of more than 2.6 times, and wear loss of the lamination jig is less than 5%. This is an effective invention that can significantly improve efficiency and reduce wear and tear on jigs.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are explanatory diagrams showing the integration of the laminate of the thermal battery of the present invention, and FIGS. 4 and 6 are explanatory diagrams of the laminate integration by the conventional manufacturing method. 1... lower presser plate, 3... exothermic agent, 4
...Battery, 6...Upper holding plate, D.
...Spring, G...Pressure attachment, F...Temporary fixing nut. Name of agent Patent attorney Toshio Nakao and 1 other person\ Ward Ward m
Figure 3 with the castle as a shrine Figure 5

Claims (1)

[Claims] A method for producing a thermal battery in which a unit cell having a fire guide hole and a heat generating agent also having a fire guide hole are laminated alternately, the method comprising: applying a pressure attachment to the stack of the unit cell and the heat generating agent through a pressure attachment; Directly apply a predetermined load with an air cylinder or press,
1. A method for manufacturing a thermal battery, which comprises temporarily fixing the laminate, then wrapping a heat-resistant heat insulating material around the side surface of the laminate and fixing it with restraining metal fittings or heat-resistant adhesive tape.