JP2006140023A - Battery pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery pack capable of surely fixing storage batteries 1 between a bottom plate 2a of a battery pack case 2 and a battery pack lid plate 3 by pressing them in an up-and-down direction with a small dimensional change. <P>SOLUTION: The battery pack is so structured that fourteen storage batteries 1 with positive and negative terminals 1c, 1c made protruded from a top end face of the battery case are housed in the battery pack case 2 provided with a square bottom plate 2a and side plates 2b surrounding front and back as well as right and left spaces over the bottom plate 2a, and are fixed in the battery pack case 2 by pressing tiptop parts of terminals 1c, 1c of each storage battery 1 downward with the battery pack lid plate 3 fitted and fixed to a flange part 2c at the top end of each side plate 2b of the battery pack case 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an assembled battery in which a plurality of batteries are combined.

  Each storage battery 1 shown in FIG. 4 is a single cell type silver oxide-zinc secondary battery in which a power generation element (not shown) is housed in a resin-made square battery case together with an electrolytic solution. The power generation element is formed by stacking positive and negative electrodes in the front-rear direction via a separator. The battery case is a battery case in which a resin battery lid 1b is fixed and sealed in the upper end opening of a resin-made rectangular container-like battery case 1a after the power generation element is stored. Positive and negative terminals 1c and 1c protrude upward from both ends. These terminals 1c and 1c seal and penetrate the battery lid 1b, respectively, and are connected to the positive and negative electrodes of the power generation element inside the battery case 1a. In addition, a liquid stopper 1d is attached to the center of the battery lid 1b.

  The storage battery 1 may be used in combination as a combined battery. And in such an assembled battery, it arranges so that the front and back side surfaces with the widest area in the battery case 1a of each storage battery 1 may overlap, and as shown to the arrow F of FIG. In general, it is generally fixed and compressed by frictional force between the side surfaces by pressing and clamping. This is because the terminals 1c and 1c protrude from the upper end portion of each storage battery 1, and it is necessary to wire these terminals 1c and 1c.

  However, since the storage battery 1 has a large number of electrodes of the power generation element overlapped in the front-rear direction between the front and rear side surfaces of the battery case 1a, the battery 1 repeats expansion and contraction with charge and discharge. For this reason, in the conventional assembled battery, since the width between the front and rear side surfaces of the battery case 1a of each storage battery 1 changes with use, the pressure for clamping and fixing increases according to the change in the width. Since it may become weak, each storage battery 1 was not able to be fixed reliably, and the problem that position shift and backlash may arise has arisen. In addition, this problem becomes prominent when the assembled battery is used for an application that receives particularly strong vibration or impact.

  The present invention is intended to provide an assembled battery that can securely fix these batteries by pressing each battery of the assembled battery from above and below with little dimensional change with a bottom plate and a cover plate.

  The assembled battery according to claim 1 has a plurality of batteries arranged with positive and negative terminals protruding from the upper end surface of the battery case and arranged on the bottom plate, and a lid plate fixed on the bottom plate with a gap therebetween. The tops of the positive and negative electrode terminals of each battery are pressed downward and fixed.

  According to the invention of claim 1, each battery is sandwiched and fixed between the upper lid plate and the lower bottom plate, and each battery is compressed in the vertical direction with almost no dimensional change. It can always be clamped with a constant pressing force, and these batteries can be fixed stably and reliably. As a result, according to the assembled battery of the present invention, even if the battery is subjected to large vibrations or shocks, there is no occurrence of positional deviation or backlash in each battery.

  Hereinafter, the best embodiment of the present invention will be described with reference to FIGS.

  In the present embodiment, an assembled battery using 14 rectangular storage batteries 1 shown in FIG. 4 will be described. As shown in FIG. 1, the 14 storage batteries 1 are arranged in two rows and stored in the assembled battery case 2, and are pressed and fixed from above by the assembled battery cover plate 3.

  As shown in FIG. 2, the assembled battery case 2 is formed by forming a metal plate in a rectangular container-like housing, and includes a rectangular bottom plate 2a and four side plates 2b surrounding the front, rear, left and right on the bottom plate 2a. I have. And the flange part 2c which spreads toward the periphery is provided in the upper end of these four side plates 2b. A number of bolting holes are perforated at appropriate intervals over the entire circumference of the flange portion 2c. Also, the assembled battery case mounting in which one bolting hole is formed at each of three positions at equal intervals in the front-rear direction on the lower ends of the outer walls of the left and right side plates 2b, 2b of the assembled battery case 2 The portion 2d is fixed. Further, positive and negative assembled battery terminal connectors 2e and 2e are projected from the rear end of the right side plate 2b of the assembled battery case 2.

  As shown in FIG. 1, 14 storage batteries 1 are accommodated in the assembled battery case 2 configured as described above by placing them on the bottom plate 2 a via rubber sheets. The 14 storage batteries 1 are housed in two rows, with eight rows arranged on the left side and six rows arranged on the right side. The storage batteries 1 in each row are arranged side by side in the front-rear direction so that the front and back side surfaces of the battery case overlap each other. Further, between the 14 positive and negative terminals 1c, 1c of the 14 storage batteries 1 adjacent to each other, a connection bar 4 is fixed with a nut, and all the storage batteries 1 are connected in series. In addition, a space for two storage batteries 1 is provided behind the six storage batteries 1 in the right column, and here, base portions (not shown) of the assembled battery terminal connectors 2e and 2e protrude, and these Wirings for connecting the positive and negative terminals 1c, 1c of the storage battery 1 at both ends connected in series with the assembled battery terminal connectors 2e, 2e are arranged. In addition, a connector protection frame (not shown) is inserted into this space so that the storage battery 1 does not move and damage the wiring and the assembled battery terminal connectors 2e and 2e.

  Each of the storage batteries 1 is housed so that the front and back side surfaces of the battery case overlap each other, so that the flat electrodes overlap in the front and rear direction. The dimensions change. However, since the vertical dimension of the battery case does not change with use, the height positions of the top portions of the terminals 1c and 1c of the storage battery 1 placed on the bottom plate 2a of the assembled battery case 2 change. There is nothing.

  As shown in FIGS. 1 to 3, the assembled battery case 2 has an assembled battery cover plate 3 attached to a flange portion 2 c provided at the upper end of the four side plates 2 b. The assembled battery cover plate 3 is a little larger than the bottom plate 2a of the assembled battery case 2 and is formed of a substantially rectangular metal plate along the outer peripheral shape of the flange portion 2c. A number of bolting holes are formed in the peripheral portion. Yes. The bolts are respectively passed through the bolt fixing holes and also passed through the bolt fixing holes of the flange portions 2c and 2d of the assembled battery case 2, and are fixed by screwing and tightening a hexagon nut (not shown) from below. The Here, since the height of the side plate 2b of the assembled battery case 2 is the same as the height to the top of the terminals 1c and 1c of the storage battery 1, the lower surface of the assembled battery cover plate 3 is the assembled battery case. 2 is in contact with the tops of the terminals 1c, 1c of each storage battery 1 and is pressed between the bottom plate 2a and sandwiched from above and below. In the present embodiment, the dimensional error of each storage battery 1 and the side plate 2b is absorbed by the elasticity of the rubber sheet laid on the bottom plate 2a, and the assembled battery cover plate 3 ensures that the terminals 1c and 1c of all the storage batteries 1 are positioned downward. For example, when the dimensional error can be absorbed by the bending of the assembled battery cover plate 3, the laying of the rubber sheet can be omitted. In addition, a rubber sheet may be attached to the lower surface of the assembled battery cover plate 3, or a material other than the rubber sheet, for example, a sheet of resin plate, glass fiber, nonwoven fabric, or a leaf spring may be used.

  According to the above configuration, each storage battery 1 is sandwiched and fixed between the assembled battery cover plate 3 and the bottom plate 2 a of the assembled battery case 2. Therefore, each storage battery 1 is pressed from above and below between the bottom surface of the battery case and the top of the terminals 1c and 1c without any dimensional change, so that it can always be held with a constant pressing force and can be stably and reliably. These storage batteries 1 can be fixed to the assembled battery case 2. Therefore, according to the assembled battery of this embodiment, even if it receives a big vibration and impact, it does not occur that each storage battery 1 is misaligned or loose.

  In the above embodiment, metal plates are used for the assembled battery case 2 and the assembled battery cover plate 3, but the material is not particularly limited as long as sufficient strength for supporting the plurality of storage batteries 1 can be obtained. Further, the assembled battery case 2 and the assembled battery cover plate 3 are not limited to plate materials, and may be produced by, for example, casting. Further, the number, arrangement, number of rows, etc. of the storage batteries 1 housed in the assembled battery case 2 are not limited to the above embodiment, and the shapes of the assembled battery case 2 and the assembled battery cover plate 3 are not necessarily square. There is no need, and the storage battery 1 can be appropriately changed according to the arrangement, the number of rows, and the like. Further, the assembled battery case 2 only needs to have at least the bottom plate 2a, and it is only necessary to fix the assembled battery lid plate 3 with a gap therebetween. Therefore, the side plate 2b surrounding the periphery on the bottom plate 2a is not necessarily provided. When the side plate 2b is not provided, the assembled battery cover plate 3 may be erected from the periphery of the bottom plate 2a of the assembled battery case 2 or may be fixed to the upper end of a column or the like attached to the periphery. You may fix with a long volt | bolt etc. between the peripheral parts of 2a. Furthermore, in the said embodiment, although the assembled battery cover plate 3 showed the case where the upper end opening part of the assembled battery case 2 was covered completely, this assembled battery cover plate 3 presses the terminals 1c and 1c of each storage battery 1. It is possible to reduce the weight by providing a through hole or the like in addition to the portion.

  Moreover, although the rectangular storage battery 1 was demonstrated in the said embodiment, this shape is arbitrary and a power generation element may be not only a lamination | stacking type but a winding type. Furthermore, although the said embodiment demonstrated the assembled battery using the storage battery 1 which consists of a silver oxide-zinc secondary battery, the kind of this battery is not limited.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an assembled perspective view illustrating a configuration of an assembled battery according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1, showing an embodiment of the present invention, is a perspective view showing the structure of an assembled battery case and an assembled battery cover plate. 1 is a perspective view illustrating a configuration of an assembled battery according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing four storage batteries used as an assembled battery according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage battery 1c Terminal 2 Assembly battery case 2a Bottom plate 3 Assembly battery cover plate

Claims (1)

  A plurality of batteries with positive and negative terminals protruding from the upper end surface of the battery case are placed side by side on the bottom plate, and a lid plate fixed at a distance above the bottom plate is used to connect the positive and negative terminals of each battery on the bottom plate. An assembled battery, wherein the top portion is pressed downward and fixed.

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