JPH09106793A - Cassette-type battery pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deterioration of battery performance, breakage owing to electrolyte leakage, or a danger of damaging a human body, when short- circuiting happens between output terminals due to external factors such as contact with a metal fragment because the output terminals are positioned on a surface of a pack, in the case of a cassette-type battery pack using a set of batteries of Ni-Cd, Ni-MH, or the like. SOLUTION: A switch 3 is provided between a set of batteries 6 and an output terminal 2. During insertion into an electronic apparatus, the switch 3 conducts causing the electronic apparatus to be powered, and during extraction from the electronic apparatus, the switch 3 is opened and the output terminals 2 are not electrified, and therefore the set of batteries 6 are protected from short-circuiting due to short-circuiting of the output terminals 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette type electronic battery pack.

[0002]

2. Description of the Related Art A conventional cassette type battery pack using an assembled battery such as Ni-Cd or Ni-MH has a protective element such as a thermal fuse or a breaker in a power supply path between the assembled battery and a battery pack output terminal. Have

[0003]

The output terminal in such a cassette type battery pack is on the surface of the battery pack,
Short circuits between output terminals can easily occur due to external factors such as contact with metal fragments. The thermal fuses and breakers that are the protective elements in this conventional cassette type battery pack are protective elements against the temperature rise of the internal assembled battery, and the temperature of the internal assembled battery rises to the operating temperature of the thermal fuse and breaker after the short circuit current flows. The short-circuit current continues to flow until it is done. The short circuit of the battery not only deteriorates the battery performance, but also there is a risk of destruction due to leakage of the electrolytic solution and damage to the human body.

[0004]

The cassette type battery pack of the present invention is provided with a switch that opens and closes by being attached to and detached from an electronic device.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIGS. 1A and 1B are a perspective view and a partially enlarged sectional view of an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. The cassette type battery pack of the present invention has an assembled battery 6 of Ni-Cd, Ni-MH, etc., a temperature fuse 7, a breaker 8, an output terminal 2, and a switch 3 in a power feeding path. Further, the case 1 has a groove 5 on its side surface, and the groove 5 serves as a guide rail when it is inserted into an electronic device.

The switch lever 4 for controlling the switch 3 is housed in the groove 5, and when the cassette type battery pack is mounted on an electronic device, the switch lever 4 is pushed so that the switch 3 can be operated. Conducts and power is supplied to the electronic device. The switch lever 4 is biased to the outside, and at the same time when the cassette type battery pack is removed from the electronic device,
The switch 3 is opened and the battery voltage is not applied to the output terminal 2. Further, by narrowing the width of the groove 5, it becomes difficult to press the switch lever 4 due to an external factor,
The possibility that the switch 3 will conduct becomes low.

[0008]

Since the cassette type battery pack of the present invention has the switch 3 which is turned on only when it is attached, the battery voltage is conducted to the output terminal when it is removed from the electronic device unless the switch lever is intentionally pushed. In this case, there is an effect that the short circuit of the assembled battery due to the output terminal short circuit due to an external factor can be protected.

[Brief description of the drawings]

1A and 1B are a perspective view and a partially enlarged sectional view showing an embodiment of the present invention.

FIG. 2 is a circuit diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Case 2 Output terminal 3 Switch 4 Switch lever 5 Groove 6 Battery pack 7 Thermal fuse 8 Breaker

Claims (1)

[Claims] 1. A cassette-type battery pack that can be attached to and detached from an electronic device such as a personal computer, wherein a switch that opens and closes when attached to and detached from the electronic device is provided in an internal power supply path.