JP2001229982A - Set battery and set battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a set battery, requiring fine resistance, in which the corrosion of a set battery member due to an electrolyte mist will not occur, and moreover, the checking of a battery is simplified. SOLUTION: A set battery is composed of multiple element cells 1 and the metal cases 2 in which the element cells 1 are housed. A housing case has openings on its first side, as well as the exhaust parts 3 and the terminals 4 arranged on the element cells 1, being housed to correspond to the opening. On the openings, the covers 5 made of a flame-retardant resin are mounted. Also, through-holes 6, 7, corresponding with the exhaust parts 3 and the terminals 4, are arranged on the covers 5. The exhaust parts 3 and the terminals 4 pass through the through-holes 6, 7 to protrude from the covers 5 and have electrical connections at the protruded parts of the terminals 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a battery pack used for a backup power supply or the like.

[0002]

2. Description of the Related Art Various types of battery packs for use as a backup power supply during a power failure have been proposed. For example, Japanese Utility Model Laid-Open Publication No. 2-49065 discloses a configuration in which a beam is provided between columns and a storage battery is mounted on a receiving frame joined to the beam. In such a configuration, since the storage battery is exposed to the outside, the storage battery may be damaged particularly by fire. In general, a synthetic resin is used for a battery case and a battery case cover which are exterior members of a storage battery. Some synthetic resin materials are provided with flame retardancy by adding a flame retardant, but the resin containing the flame retardant is not environmentally desirable because it cannot be recycled. Therefore, when fire resistance is required, as described in Japanese Utility Model Application Laid-Open No. 59-161265, a storage battery is stored in a storage using a material having fire resistance such as metal. ing.
However, in such a configuration, there is a problem that gas discharged from the exhaust port of the storage battery at the time of charging fills the storage, and a small amount of electrolyte mist discharged from the exhaust port also corrodes the storage. is there. Further, there has been a problem that it is difficult to check the terminal voltage of the storage battery and check the terminal portion for corrosion, liquid leakage and the like.

[0003]

DISCLOSURE OF THE INVENTION The present invention solves the problems such as the filling of the gas in the storage and the corrosion of the storage due to the electrolyte mist, which were generated in the conventional battery pack, and the inspection of the storage battery. It is an object of the present invention to provide an assembled battery and an assembled battery module having good workability in performing the operation.

[0004]

According to a first aspect of the present invention, there is provided an assembled battery comprising a plurality of storage batteries and a metal storage case for storing the storage batteries. The storage case has an opening on one surface, and a terminal portion and an exhaust portion provided in the storage battery are stored so as to correspond to the opening, and a cover made of a flame-retardant resin is attached to the opening. The cover has a through hole corresponding to the terminal portion and the exhaust portion, and the terminal portion and the exhaust portion penetrate the through hole and protrude from the cover and protrude from the cover of the terminal portion. The storage batteries adjacent to each other are electrically connected to each other to form an assembled battery.

According to a second aspect of the present invention, there is provided the battery pack according to the first aspect, wherein the battery case and the battery case lid constituting the storage battery can be recycled without containing a flame retardant. It was made.

According to a third aspect of the present invention, in the battery pack according to the first or second aspect, the cover attached to the opening of the storage case has a transparency through which the storage battery can be seen. It has been prepared.

According to a fourth aspect of the present invention, there is provided an assembled battery module in which a plurality of the assembled batteries according to any one of the first, second, and third aspects are stacked in multiple stages.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an assembled battery module according to the present invention using twenty-four horizontal cathode-absorbing stationary lead-acid batteries (hereinafter referred to as a unit cell 1). The outer container of the battery case and the battery case cover of the unit cell 1 is made of a resin material having no flame retardancy, for example, a polypropylene resin. The unit cells 1 are stored in a storage case 2 made of a steel plate in a state where six unit cells 1 are arranged in a horizontal state. The storage case 2 has a box shape with only one surface opened. The unit cell 1 is housed so that the exhaust unit 3 and the terminal unit 4 are exposed to the outside.
The opened part of the storage case 2 is covered with a cover 5 (shown by hatching). As shown in FIG. 2, the cover 5 is provided with a through hole 6 for exhausting gas and electrolyte mist from the exhaust unit 3. The exhaust part 3 can be configured so as not to accumulate gas or electrolyte mist in the storage case by penetrating through the through hole 6. Cover 5
Is provided with a through hole 7 for projecting the terminal portion 4 to the outside of the cover 5 so that the connection between terminals can be connected outside the cover 5. The connection between the unit cells 1 is made by using a connection means such as a connection plate 8 at a portion of the terminal portion 4 protruding outside the cover 5 as shown in FIG. The cover 5 is made of a flame-retardant resin material. For example, a flame-retardant hard vinyl chloride resin or the like can be used. With such a configuration, the unit cell 1
The peripheral surface of the battery except for the surface facing the unit cell 1 adjacent to the unit cell is covered with the metal storage case 2 or the flame-retardant cover 5, so that the unit cell does not catch fire in the event of a fire. Further, the vinyl chloride used as the material of the cover 5 does not corrode even when it comes into contact with the electrolyte mist (dilute sulfuric acid) rarely discharged from the exhaust part 3. Further, since the cover 5 itself has no electric conductivity, there is no danger of short-circuiting between the terminal portions 4 via the cover 5, the weight is lighter than the metal plate, the detachment is easy, and the terminal 5 is used at regular inspection of the unit cell 1. Inspection of defects such as corrosion and liquid leakage of the part 4 is easy. When the cover 5 is made of a material having transparency that allows the cell 1 to be seen through, the cover 5 does not need to be removed at the time of handling and inspection, and the inspection work efficiency can be improved.

When the unit cell 1 reaches the end of its life, the exterior of the unit cell 1 can be recycled because the exterior of the unit cell 1 is made of a resin to which no flame retardant has been added, and the cover 5 has been replaced. Since it can be used again later, it is environmentally convenient.

In the above embodiment, an example in which the storage cases 2 are stacked in four layers has been described, but it is of course possible to use the storage cases 2 alone without being stacked.

[0012]

According to the structure of the present invention, in a battery pack having a plurality of storage batteries stored in a storage case and a battery pack module in which a plurality of the battery packs are stacked, the risk of igniting a unit cell in the event of a fire can be suppressed and the battery can be reduced. Inspection workability,
Further, since a resin material containing a flame retardant is not used for the battery exterior, it is easy to recycle, and is extremely useful industrially.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing the cover.

FIG. 3 is a sectional view showing a main part of the battery pack.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Unit cell 2 Storage case 3 Exhaust part 4 Terminal part 5 Cover 6 Through-hole (passes an exhaust part) 7 Through-hole (passes a terminal part) 8 Connection plate

Claims (4)

[Claims] 1. An assembled battery comprising a plurality of storage batteries and a metal storage case for storing the storage batteries, wherein the storage case has an opening on one surface, and a terminal portion and an exhaust portion provided on the storage battery. Is accommodated so as to correspond to the opening, a cover made of a flame-retardant resin is attached to the opening, and the cover is provided with a through hole corresponding to the terminal portion and the exhaust portion, A terminal portion and the exhaust portion penetrating through the through-hole and protruding from the cover, and adjacent storage batteries are electrically connected to each other at a portion of the terminal portion protruding from the cover; battery. 2. The battery pack according to claim 1, wherein the battery case and the battery case lid constituting the storage battery are made of a recyclable resin without containing a flame retardant. 3. The battery pack according to claim 1, wherein the cover has transparency so that the storage battery can be seen through. 4. An assembled battery module comprising a plurality of the assembled batteries according to claim 1, 2, or 3 stacked in multiple stages.