JPH0584023U - Storage battery with vent hole - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to degassing a storage battery cell used in a battery-using device, and its purpose is to store hydrogen gas generated from the storage battery cell during overcharging or overdischarging in a battery case. It is to prevent it from accumulating, prevent explosion and increase safety. [Structure] The upper surface of the storage battery 1 and the battery case 2 that is exposed to the outside when connected to the battery-using device body,
At least two degassing holes 4 and 5 were provided on the side surface of No. 3 or the connection interface with the battery-using device, respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a removable cassette-type storage battery used as a power source for battery-using devices such as cordless tools.

[0002]

[Prior Art]

 When the battery is overcharged or overdischarged, the gas generated inside the battery is not consumed and the internal pressure rises, so hydrogen gas is generated from the valve. Since the conventional battery case does not have a vent hole, it is in a hermetically sealed state, and the generated hydrogen gas accumulates in the battery case. Even if the gas vent hole is provided, the gas is released only in a certain range and in a certain direction, so that the gas is accumulated inside the battery-using device. Therefore, when the terminal of the storage battery is on the top, hydrogen gas escapes from the gap between the battery terminal and the battery case when it is installed in the battery-using device body, but hydrogen gas accumulates near the terminal of the battery-using device body. , There was a problem that sparks could fly out and explode when the switch was pulled.

[0003]

[Problems to be solved by the device]

 In the conventional battery case, the generated hydrogen gas is difficult to escape, and if it accumulates near the gas terminals, sparks could explode when the switch was pulled. An object of the present invention is to eliminate the above-mentioned problems and to provide a storage battery capable of releasing a larger amount of hydrogen gas regardless of the insertion direction of the battery.

[0004]

[Means for Solving the Problems]

 The above object is achieved by providing two or more gas vent holes at the connecting portion and the bottom portion of the battery case of the storage battery used as the power source of the battery utilizing device.

[0005]

[Action]

 The storage battery with a gas vent hole configured as described above has two or more gas vent holes that allow gas to escape upward and downward, so the hydrogen gas generated during overcharge and over discharge of the storage battery It can be released regardless of the direction of.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. The storage battery of the present invention comprises a large number of storage battery cells 1 connected in series, battery cases 2 and 3 covering the storage battery 1, and gas vent holes 4 and 5 provided in the case 2 for releasing generated hydrogen gas. To be done. In addition, 6 is a charger for charging the storage battery cell 1, and 7 is a tool body of the battery-using device. Two gas vent holes 4 are provided on the left and right of the upper surface of the case 2 which is the upper surface of the storage battery cell 1, and the gas vent holes 5 are portions exposed to the outside when the storage battery is connected to the tool body 7. Two pieces are provided on the bottom side surface of the case 2 or on the connection boundary surface with the tool body 7. When the storage battery configured as described above is charged by the charger 6 and an overcharge condition occurs due to an abnormality in the charging stop device during charging, the generated hydrogen gas is lighter than air, so the gas vent hole 4 Hydrogen gas escapes from 5. Further, when the storage battery is attached to the tool main body 7 and the work is performed, the lock state or the heavy load work causes an overdischarge state.

FIG. 4 shows a state in which the tool main body 7 is turned up. Hydrogen gas generated from the upper and middle portions of the storage battery cell 1 passes through the gas vent holes 5 through the gap between the storage battery and the tool main body 7. Further, hydrogen gas generated from the lower portion of the storage battery cell 1 escapes from the gas vent hole 4. FIG. 5 shows a state in which the tool main body 7 is turned down. Hydrogen gas H ₂ generated from the lower part and the middle part of the storage battery cell 1 escapes from the gas vent holes 4 and 5, and is generated from the upper part of the storage battery cell 1. The hydrogen gas H ₂ thus formed escapes from the gas vent hole 5. FIG. 6 shows a state in which the tool body 7 is laid sideways, and hydrogen gas H ₂ generated from the storage battery cell 1 escapes from the gas vent hole 5 over the entire battery case, and the lower and middle parts of the storage battery cell 1 are discharged. The hydrogen gas H ₂ generated from the gas escapes from the gas vent hole 4.

[0008]

EFFECTS OF THE INVENTION According to the present invention, by providing a gas vent hole on the upper surface of the battery case and the connection boundary surface or side surface, the generated hydrogen gas can be released to the outside of the battery-using device or charger, resulting in an explosion. Less likely to.

[Brief description of drawings]

FIG. 1 is a perspective view of a storage battery according to an embodiment of the present invention.

FIG. 2 is a top view of a storage battery showing an embodiment of the present invention.

FIG. 3 is a perspective view of a charger and a storage battery showing how gas escapes during charging.

FIG. 4 is a perspective view showing the release of gas when a storage battery is mounted and used upward.

FIG. 5 is a perspective view showing gas release when a storage battery is attached and used downward.

FIG. 6 is a perspective view showing the release of gas when a storage battery is mounted and used sideways.

[Explanation of symbols]

Reference numeral 1 is a storage battery cell, 2 and 3 are battery cases, and 4 and 5 are gas vent holes.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Creator Yoshio Iimura 1060 Takeda, Katsuta City, Ibaraki Prefecture Hitachi Koki Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A removable cassette type storage battery used as a power source for a battery-utilizing device tool, comprising: an upper surface of a battery case; and a case side surface or a battery-utilizing device exposed to the outside when inserted into the battery-utilizing device. A storage battery with a gas vent hole, characterized in that two gas vent holes are provided on each connection boundary surface.