JP2537043Y2 - Thermal battery - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an improvement in a current collector plate of a thermal battery in which a heating agent is incorporated in the battery and the battery is heated to a high temperature by igniting the heating agent when the battery is used to activate the battery. It is about.

[0002]

2. Description of the Related Art A thermal battery is a battery using a molten salt as an electrolyte and is nonconductive at room temperature because the electrolyte is solid. By heating to a high temperature, the electrolyte melts and becomes conductive, so that electric power can be supplied to the outside.

[0003] A thermal battery is a type of storage battery that has little self-discharge during storage at room temperature, can be stored for a long period of time, and can be activated instantaneously when necessary. Further, a wide range such as -55 to 100 [deg.] C. can be used even at an environmental temperature. It has been put to practical use as a power supply for flying objects such as rockets and various emergency power supplies.

[0004] In a battery for large current discharge requiring parallel connection, a conventional thermal battery includes a power generating element 1 in which power generating cells 2 and heat generating agents 3 are alternately stacked as shown in FIG. The electromotive section laminated body was formed by being connected in parallel via the electric plate 5 and housed and arranged.

Thus, for example, when two power generating elements 1 in which power generating cells 2 are connected in series are connected in parallel, three flat current collectors 5 are required, and the number of lead wires and other insulating materials is equal to the number of current collectors. The number of accessories such as objects has increased, and the number of assembly work has also increased.

[0006]

The thermal battery of the present invention is a thermal battery in which a plurality of power generating elements are electrically connected in parallel, and the power generating elements are housed and arranged so as to be sandwiched between U-shaped current collectors. Therefore, the number of accessories such as current collectors, lead wires, and other insulators can be significantly reduced as compared with conventional ones. In addition, the arrangement of the lead wires is facilitated, so that it is possible to provide a highly reliable thermal battery that is easy to assemble as a whole.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a is an electromotive section laminate, and 1 is a power generating element in which power generating cells 2 and exothermic agents 3 are alternately laminated. The power generation cell 2 includes a positive electrode layer, an electrolyte layer and a negative electrode layer. The positive electrode layer is formed of iron disulfide, the electrolyte layer is formed of a potassium chloride-lithium chloride eutectic salt, and the negative electrode layer is formed of a lithium alloy. The exothermic agent 3 is obtained by molding a mixture of iron powder and potassium perchlorate powder by powder molding.

Next, the two power generating elements 1 are connected in parallel via the current collector plate 5. This is housed so as to be inserted into the U-shaped current collector plate 4.

The U-shaped current collector plate 4 can be easily manufactured by processing a flat plate of iron, nickel, molybdenum or the like into a U-shape. Further, an insulator 6 is provided at a portion in contact with the laminated surface of the inner power generation element to prevent a short circuit.

FIG. 3 is a longitudinal sectional view of the thermal battery of the present invention, in which a heating agent is wound around the electromotive section laminate a shown in FIG. Reference numeral 8 denotes an ignition ball, and 9 denotes an ignition terminal. Reference numeral 11 denotes a battery cover in which terminals are attached to stainless steel via glass, and the battery case 11 is sealed by arc welding at a peripheral portion with the battery case 11. 7 is a heat insulating material.

[0011]

According to the present invention, in a battery in which power generating elements are electrically connected in parallel, the number of accessories such as lead wires and other insulators can be reduced, the assembling work can be facilitated, and the reliability of the battery can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an electromotive section laminate used in the thermal battery of the present invention.

FIG. 2 is a diagram showing an electromotive section laminate in a conventional thermal battery.

FIG. 3 is a longitudinal sectional view showing an embodiment of the thermal battery of the present invention.

[Explanation of symbols]

 a power generation unit laminated body 1 power generation element 2 power generation cell 3 heating agent 4 U-shaped current collector plate 6 insulator

Claims (1)

(57) [Scope of request for utility model registration] An electromotive section laminated body (a) has a U-shaped current collector plate.
A plurality of power generating elements (1) electrically connected in parallel are housed in (4), and the power generating elements (1) alternately include rectangular power generating cells (2) and exothermic agents (3). A thermal battery which is laminated and has a U-shaped current collector plate (4) in which insulation (6) is applied to a portion in contact with a laminated surface of an inner power generation element.