JPH0121485Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of bundling a plurality of unit battery stacks each consisting of a certain number of unit cells or unit battery cells, and connecting the anode and cathode terminals of each unit battery stack in series to create a high-voltage stack. This invention relates to a laminated dry battery that can generate an electromotive force of .

Multiple unit battery stacks made up of a certain number of unit batteries or unit battery cells are arranged in parallel and bundled, and the anode and cathode terminals of each unit battery stack are connected in series to generate a voltage of several tens to hundreds of volts. In high-voltage laminated dry batteries configured to generate electromotive force, short circuits sometimes occur inside the batteries, rendering them unusable and causing fire accidents.
This was caused by a liquid junction occurring between the unit cell stacks.

Therefore, an example of the configuration of a conventional high-voltage laminated dry battery will be explained based on the drawings. Fig. 1 is a plan view showing the internal structure of a conventional high-voltage laminated dry battery. Cell stack 1
a, 1b, 1c, 1d, 1e, 1f, 1g, 1h
(Hereafter 1j (j=a, b, c, d, e, f, g,
h)) is divided into two to form four unit battery stack rows A and B, and these unit battery stack rows A and B
A partition C made of an electrolyte-resistant and water-impermeable insulating film and having approximately the same height as each unit cell stack 1j is inserted between the stacks to arrange them in parallel and bundle them together. Anode terminal clamping plates 2a, 2b, 2c, 2d, 2e, 2f, 2g and cathode terminal clamping plates 3b, 3c, 3d, 3e, 3f,
3g and 3h are connected in series, and further,
External terminal lead wires 4 and 5 were connected to the cathode terminal clamping plate 3a of the unit cell stack 1a and the anode terminal clamping plate 2h of the unit cell stack 1h, respectively, to obtain an electromotive force of 240V. Therefore, if the cathode terminal clamping plate 3a of the unit cell stack 1a is set to 0V at this time, the adjacent unit battery stack 1
Since the anode terminal clamping plate 2h of h is 240V, the voltage between the terminal clamping plate 3a and 2h is 240V - 0V = 240V,
In addition, the anode terminal clamping plate 2b of the unit cell stack 1b is
60V, 3g clamping plate for cathode terminal of 1g cell stack
is 180V, so there is a high potential difference of 180V - 60V = 120V between terminal clamping plates 2b and 3g, and 120V between terminal clamping plates 3c and 2f.
These adjacent cell stacks 1a and 1h, 1
b and 1g and 1c and 1f were integrated through a partition C having approximately the same height as each unit cell stack. Therefore, if there is a lot of moisture in the battery and the stack tightening tape 6 is made of paper or the like, the unit cell stack will form an electric circuit through this tape 6, and corrosive liquid will accumulate on the anode terminal plate 2j. The liquid caused short circuits with the cathode terminal clamping plates 3a, 3c, 3g, etc. of adjacent unit cell stacks in parallel positions, resulting in discharge accidents, which led to serious light emission accidents.

The present invention was developed in view of these points, and by completely isolating adjacent unit cell stacks with high potential differences and preventing liquid junctions, it is possible to create high-voltage stacked dry batteries without short circuits or fires. The aim is to provide a battery stack consisting of a certain number of unit cells stacked together and clamped at both ends by clamping plates for taking out electrode terminals. In a high-voltage stacked dry battery constructed by connecting the terminals of the stacks in series, half of the unit cell stacks are arranged in parallel, and an electrolyte-resistant and water-impermeable material is placed between the two rows of unit cell stacks arranged in parallel. An insulating film is inserted as a middle partition, and the upper and lower ends of the inner partition are respectively extended upwardly of the unit cell stack, and each extension is covered with the terminal extraction clamping plates at the top and bottom of the unit cell stack, respectively. It features a configuration in which it is housed in a case.

Hereinafter, an example of implementation will be described in detail based on the drawings.
In Figures 2, 3, 4, and 5, the high-voltage stacked dry battery of the present invention consists of eight unit cell stacks 10a, 10b,
10c, 10d, 10e, 10f, 10g, 10
h (hereinafter, 10j (j=a, b, c, d, e, f,
g, h)), a partition 12, and a case 14 that houses them. Each unit cell stack 10j is made by stacking 20 unit cells, and furthermore, anode terminal extraction clamping plates 16j (hereinafter j corresponds to the above) and cathode terminal extraction clamping plates 18j are attached above and below, and the stack is tightened with tape 20. Each unit cell stack 10j is crimped and bound, and is formed by covering each unit cell stack 10j with a heat-shrinkable resin film, each having an electromotive force of 30V. This 8 unit cell stack 10
Half of the cell stacks 10j are arranged in two rows of four, and a partition 12 made of an electrolyte-resistant and water-impermeable insulating film is inserted between them, and all the unit cell stacks 10j are tied together with a stack binding tape 24. do.
At this time, the unit cell stacks 10j are arranged with their polarities alternated to facilitate connection. That is, as shown in FIGS. 2, 3, and 4, the unit cell stack 10a has the cathode terminal extraction clamping plate 18a on the upper side, and the adjacent unit cell stack 10b
The clamping plate 16b for taking out the anode terminal is on the upper side, and the clamping plate 18c for taking out the cathode terminal in the adjacent unit cell stack 10c is on the upper side. Then, the anode terminal extraction clamping plate 16j and the cathode terminal extraction clamping plate 18j of each adjacent cell stack 10j are connected to the connecting line 2.
6 are connected in series, and the cathode and anode external terminal lead wires 28 and 30 are connected to the cathode terminal extraction clamping plate 18a of the unit cell stack 10a and the anode terminal extraction clamping plate 16h of the unit cell stack 10h, respectively. A high electromotive force is obtained. Partition 1
2, its upper and lower ends are connected to the unit cell stack 1, respectively.
Extend by the width of 0j, and this extended portion 13, 13'
are folded back to opposite sides to form a crank-shaped cross section, and placed over the upper and lower positive and negative terminal extraction clamping plates 16j and 18j of different cell stack rows, respectively, and then stored in the case 14 in this state. There is.

According to the above configuration, the extension portion 13 of the partition 12,
13' is a unit cell stack row A arranged in parallel,
B, and the upper or lower electrode terminal extraction clamping plates 16j, 18 of each row A, B.
Since one side of the cell stack 10j is completely covered and the cell stack rows A and B are isolated from each other within the case 14, even if the cell stack 10j leaks, the leaked electrolyte will not be transmitted through the stack tightening tape 20. There was no possibility of liquid junctions with adjacent unit cell stacks with high potential differences. Therefore, there will be no short circuit between the unit cell stacks that have a high potential difference.
The fire accidents caused by short circuits that previously occurred have completely disappeared, and high-voltage laminated dry batteries can now be used with peace of mind.

In this embodiment, as shown in FIG. 6a,
A configuration is shown in which the cross-sectional shape of the partition 12 is square-shaped, that is, crank-shaped, and covers the anode terminal extraction clamping plates 16j, 18j to isolate two cell stack rows A and B. As shown in Figure b, even if the cross-sectional shape of the partition 12 is made to separate the unit cell stack rows A and B, similar effects can be obtained, so the shape of the partition 12 is limited to the shape of the partition 12 of the embodiment. isn't it.

In addition, although this example shows an example in which four cell stack rows are arranged in parallel, four cell stack rows are arranged in parallel. It should be noted that even in high-voltage laminated dry batteries formed by connecting unit cell stacks in series, a high potential difference may occur between parallel adjacent unit cell stacks, and the present invention is also very effective in this case. put.

As described above, according to the present invention, in a high-voltage stacked dry battery constructed by arranging four or more unit cell stacks, half of each in two rows in parallel, and binding them together, and connecting each unit cell stack in series, By vertically extending the partition inserted between the two cell battery stack rows and covering the electrode terminal extraction clamping plate with the extended portion, the cell cell stack rows are isolated from each other within the case. It is now possible to prevent liquid junctions that occur between unit cell stacks that have a high potential difference, thereby preventing short circuits and fire accidents, and it has become possible to provide high-voltage laminated dry batteries that can be used with peace of mind. Ta.

[Brief explanation of the drawing]

Fig. 1 is a plan view and a front view showing the internal structure of an example of a conventional high-voltage laminated dry battery, Fig. 2 is a perspective view of the internal structure showing an example of the implementation of the present invention, and Fig. 3 is a plan view and a plan view thereof. , FIG. 4 is a bottom view thereof, FIG. 5 is a perspective view showing the finished product placed in the case, FIG. 6 a is a side view of FIG. 2, and FIG. 6 b is a side view showing another embodiment. be. 10j (j=a, b, c, d, e, f, g, h
The same applies below)...Battery stack, 12...Inner partition, 14...Case, 16j...Anode terminal extraction clamping plate, 18j...Cathode terminal extraction clamping plate, 20...
Stack tightening tape, 24...Stack binding tape, 26...Connection wire, 28...Cathode external terminal lead wire, 30...Anode external terminal lead wire.

Claims (1)

[Claims for Utility Model Registration] Comprising a plurality of unit cell stacks 10a to 10h, a binding tape 24, a partition 12, and a case 14, each of the unit battery stacks 10a to 10h consists of a fixed number of stacked flat plates. A unit cell, a pair of electrode terminal extraction clamping plates 16a-h, 18a-h placed on the upper and lower ends of the stacked unit cells, and the unit cell and the electrode terminal extraction clamping plates 16a-h. , 18a to 18h, the partition 12 is made of an electrolyte-resistant and water-impermeable insulating film, and the unit cell stacks 10a to 10h are divided into two. 2
Divide into groups, arrange these groups in two adjacent rows, and in each group, each of the unit cell stacks 10a to 10h
are connected in series and the groups are further connected in series, and the partition 12 is connected between the groups so that the extensions at both ends thereof are connected to the electrode terminal extraction clamping plates 16a to 16h, 18.
Insert the binding tape 24 so as to cover a to h.
A high-voltage laminated dry cell battery characterized in that it is integrally bundled and stored in the case 14 in this state.