JPH05152009A - Sealed storage battery - Google Patents

Abstract

PURPOSE:To provide a sealed storage battery enabling a user to visually recognize operation of a thermostat. CONSTITUTION:This is a sealed storage battery mainly composed of an electrode plate group 4 consisting of positive electrode plates 1, negative electrode plates 2 and sparators 3 and a case 5 for containing the plate group 4, while having a built-in thermostat 7 for protecting an electric circuit, and provided with a thermocontracting tube for changing color thereof by a temperature, for the exterior.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed storage battery, and more particularly to a sealed storage battery with a built-in electric circuit protection device.

[0002]

2. Description of the Related Art A conventional sealed storage battery will be described with reference to FIG. The electrode plate group 4 composed of the positive electrode plate 1, the negative electrode plate 2 and the separator 3, the case 5 made of styrene, acrylonitrile, and butadiene copolymer resin (hereinafter abbreviated as ABS resin) housing the electrode plate group 4 and the battery terminal 6 are short-circuited. When the battery is short-circuited, it is mainly composed of a thermostat 7 for preventing smoke and ignition and for preventing overcharge of the battery. When the battery is short-circuited or when the battery heats up due to overcharge, it is shown in FIG. As described above, the bimetal 8 in the thermostat 7 operates to open the contacts 9 and 9a to interrupt the open circuit.

[0003]

However, in such a structure, there is a problem that the user cannot visually determine whether the thermostat 7 is operating. The present invention solves such a problem, and an object of the present invention is to provide a sealed storage battery in which the user can visually check the operation of the thermostat.

[0004]

In order to solve this problem, a sealed type storage battery of the present invention is mainly composed of an electrode plate group composed of a positive electrode plate, a negative electrode plate and a separator, and a case accommodating the electrode plate group. A sealed storage battery having a fuse, a thermostat, or a PTC element for protecting an electric circuit, which has a heat-shrinkable tube whose color changes depending on temperature, which is directly or indirectly It has a structure in contact with a fuse, a thermostat or a PTC element.

[0005]

With this construction, when the thermostat operates, that is, when it generates heat, the heat-shrinkable tube discolors, so that the user can visually confirm the operation of the thermostat.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sealed storage battery according to an embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the sealed storage battery of the present embodiment comprises an electrode plate group 4 composed of a positive electrode plate 1, a negative electrode plate 2 and a separator 3, an ABS resin case 5 for accommodating the electrode plate group 4, and a battery. It is mainly composed of a thermostat 7 housed to prevent smoke and fire when the terminal 6 is short-circuited and to prevent overcharging of the battery. The thermostat 7 is arranged so as to be exposed from the case 5, In addition, by providing the heat-shrinkable tube 10 having a property of discoloring with temperature as an exterior material, the thermostat 7 and the shrinkable tube 10 can be brought into direct contact with each other to enhance thermal conductivity.

Further, other protection device may be used as long as it is not a thermostat, as long as the protection device generates heat when the electric circuit is cut off.

Further, indirect heat conduction may be performed by interposing a case such as a case where the protective device and the heat-shrinkable tube are thin.

[0010]

As is apparent from the above description of the embodiments, according to the sealed type storage battery of the present invention, the thermostat operates by using a heat shrinkable tube that changes color with temperature in contact with the thermostat and using it for the battery exterior. The effect is that the user can visually judge whether or not it is present.

In the case of overcharging, there is also an effect that it can be judged by the color change of the heat-shrinkable tube even if the temperature at which the thermostat operates is not reached.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a partially cutaway configuration of a main part of a sealed storage battery according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a configuration of a main part of a conventional sealed storage battery with a part cut away.

FIG. 3 (a) is a sectional view of the thermostat showing a normal state. FIG. 3 (b) is a sectional view of the thermostat showing a state during operation.

[Explanation of symbols]

 1 Positive Electrode Plate 2 Negative Electrode Plate 3 Separator 4 Electrode Plate Group 5 Case 7 Thermostat 10 Heat Shrink Tube

Claims (2)

[Claims] 1. A fuse group for protecting an electric circuit, a thermostat, or a PTC element (positive temperature), which is mainly composed of an electrode plate group composed of a positive electrode plate, a negative electrode plate, and a separator and a case accommodating the electrode plate group. A sealed type storage battery having a built-in resistance element) having a characteristic, wherein the sealed type storage battery has a heat-shrinkable tube whose color changes depending on temperature. 2. A fuse, thermostat, or PT
The sealed storage battery according to claim 1, wherein the C element and the heat-shrinkable tube are in direct or indirect contact with each other.