JPH04162347A - Battery pack - Google Patents

Abstract

PURPOSE:To prevent trouble and harm from being given to a customer due to melting, damage, etc., of a casing by storing a plurality of batteries, wrapped with a wrap heat insulating material, in the casing coated with a guard heat insulating material, and additionally filling between a storage part internal surface and the guard heat insulating material with silica powder or a fire extinguishing agent. CONSTITUTION:A plurality of batteries 2, wrapped by a wrap heat insulating material in each unit, are stored in a battery storage part 8 in a casing 1 whose internal surface is coated with guard heat insulating materials 5, 6. Gas and smoke are guided in a filter storage part 9 in accordance with a trouble mode to pass through a filter 11 filled with silica powder or a fire extinguishing agent 14. In the case of a large amount of soot and smoke in the trouble mode, a cavity part between an internal surface of the battery storage part 8 and the guard heat insulating material 5 is filled with the silica powder. In this way, even in the case of generating heat, smoke and ignition for some reason, melting and deformation of the casing of a battery pack, made of plastic, and harm, given to a customer of using a portable remote terminal, are eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a battery bank for a portable terminal such as a laptop computer, a computer, a game device, a mobile phone, or a cordless phone.

[Prior Art] Conventionally, this type of portable terminal generally uses batteries with relatively low energy density, such as manganese batteries, alkaline manganese batteries, and nickel-cadmium batteries. For this reason, no particular measures have been taken to prevent battery failures in battery packs that house these batteries. In other words, in the plastic battery pack housing,
It was simply a matter of accommodating multiple batteries and wiring them in series.

However, recently, lithium batteries, nickel metal hydride batteries, etc. have been developed that have an energy density more than twice that of the above-mentioned batteries, and with the demand for smaller and lighter mobile terminals, these high energy densities batteries are being replaced.

[Problem to be Solved by the Invention] Under such circumstances, if the battery is short-circuited, a large amount of energy will be consumed in a short period of time, and there is a possibility of fire or explosion. The conventional method of simply housing these high-energy-density batteries in a plastic battery pack casing can cause the battery pack casing to burn or melt in the event of a malfunction such as a short circuit, or cause an explosion to destroy the casing. This had the disadvantage that it could be damaged and become a nuisance and cause harm to customers using portable terminals.

In this regard, the present invention aims to provide a battery pack that is effective and suitable for solving the above-mentioned conventional problems.

[Means for Solving the Problems] The above problems are achieved by the present invention adopting the following novel characteristic configuration means.

That is, a feature of the present invention is that a plurality of batteries each wrapped with a wrap insulation material are stored in a battery storage section of a casing whose inner surface is covered with a card insulation material, and the batteries are This is a battery pack in which silica powder or a fire extinguishing agent is additionally filled between the inner surface of the storage part and the card insulation material.

[Function] Since the present invention takes the above-mentioned measures, even if a high-energy density battery generates heat, ignites, or smokes due to some failure cause, the wrap insulation material and the card insulation material can be fixed according to the failure mode. The additional use of silica powder or fire extinguishing agent will prevent the plastic casing of the battery pack from melting and will not harm the user (customer) of the portable terminal containing the battery.

[Example code] Embodiments of the invention will be explained in detail with reference to the drawings.

Figure 1 shows this embodiment. In the figure, A is the battery pack of this embodiment, 1 is a boat-shaped casing made of plastic, etc., 2 is a high energy density battery, and 3 is a single battery 2. 4 is a heat insulating material such as glass wool attached to one end of the battery 2 on the safety valve side (not shown); 5, 6
1 is a card heat insulating material for protecting the housing 1 from heat; 7 is a @ wall for partitioning the inside of the housing 1 between the battery storage section 8 and the filter storage section 9; 10 is a waste discharge hole for discharging waste; 1
1 is a filter, 12, 13 is a heat insulating material such as glass wool, and 14 is silica powder, fire extinguishing agent, etc.

The functions of the specifications of this embodiment will be explained below by presenting such an embodiment.

It is possible that the battery 2 with high energy density may generate heat due to some reason such as a short circuit, or in extreme cases, it may catch fire. Preventing reactions. In such a case,
Generally, the safety valve of high energy density battery 2 is released,
There is a possibility that scum, smoke, and flames may come out, and a heat insulating material 4 such as glass wool is used to suppress these gases, smoke, and flames.

When two groups of batteries wrapped with wrap insulation material 3 are directly housed in a row in the battery compartment 8 of the housing 1, the housing 1 is generally made of plastic such as polyvinyl chloride, ABS, or polycarbonate, so there is no risk of it deforming or collapsing. Since the battery pack A is partially melted, a card heat insulating material 5.6 is attached to the inside of the housing 1 to protect the battery pack A.

When waste is released from the battery 2 in this way, gas is released from the filter storage section 9 because if the battery pack A has a sealed structure, the weak part of the housing 1 will be damaged by the pressure of the gas. There is a partition wall 7 between the battery storage section 8 and the filter storage section 9, and a hole or slit (not shown) is provided here to guide gas and smoke to the filter storage section 9.

The filter 11 is divided into a glass wool part 12, 13 and a part filled with silica powder or fire extinguishing agent 14, and filters out soot and the like. The gas that has passed through the filter 11 is discharged through the gas discharge hole 10.
Or emitted to the outside through the slit.

Due to these measures, the gas released from the gas release hole 10 is released at a temperature of about room temperature.

Although FIG. 1 is drawn as an open structure to explain the internal structure, in reality, battery pack A is sealed except for the gas release hole 10 by a method such as adhesive, ultrasonic welding, or heat fusion. Ru.

Further, in FIG. 1, an example in which a filter 11 is provided has been described, but depending on the failure mode of the high energy density battery 2, it may be sufficient to simply provide a gas release hole 10 or a slit. Further, in FIG. 1, the filter 11 is explained as having a triple structure, but depending on the failure mode of the battery 2, it is also possible to have only the glass wool portions 12 and 13.

As the wrap heat insulating material 3, a Teflon sheet, crow cloth, etc. can be used, and as the card heat insulating materials 5, 6, fireproof cloth, crow cloth, etc. can be used.

If there is a lot of soot or smoke due to the failure mode of the high energy density battery 2, it is effective to fill the gap between the inner surface of the battery housing section 8 and the card heat insulating material 5 with silica powder.

Furthermore, if a flame occurs in the failure mode, it is effective to fill the gap between the inner surface of the battery housing section 8 and the card heat insulating material 5 with a fire extinguishing agent such as sodium carbonate or sodium bicarbonate.

[Effects of the Invention] Thus, by wrapping a high-energy density battery with a heat insulating material, the present invention prevents the plastic battery bank casing from melting or deforming even if it generates heat, smoke, or catches fire for some reason. , there will be no harm to customers using portable terminals.

In addition, these heat insulating materials are not made of special materials and have excellent effects such as being able to be provided at low cost in battery packs.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the invention showing a filter and a battery each wrapped in wrap insulation. A... Battery pack 1... Housing 2... Battery 3... Wrap insulation material 4.12.13.
...Insulating material 5.6...Card heat insulating material 7...Partition wall 8...Battery storage section 9...Filter storage section 10...Dust release hole 1]...Filter 14...Silica Powder or extinguishing agent

Claims (1)

[Claims] 1.Multiple batteries each wrapped with wrap insulation material,
The card is stored in a battery compartment of a casing whose inner surface is covered with a card insulation material, and silica powder or a fire extinguishing agent is additionally filled between the battery housing interior surface and the card insulation material depending on the failure mode. battery pack