JP2000012383A - Electric double layer capacitor bank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain space efficiency by increasing the arrangement density of the cells of a cylindrical container. SOLUTION: A plurality of cylindrical electric double layer capacitor cells 2 are vertically and horizontally arranged and housed in a container while the vertical arrangement of the cylindrical electric double layer capacitor cells 2 is set symmetrically to the horizontal arrangement 6 times by obliquely making 60 deg. between those vertical and horizontal arrangement, and they are connected in serial/parallel so that an electric double layer capacitor bank 1 can be constituted. Thus, the cylindrical wound type cells whose productivity in high volume is satisfactory can be adopted, and housing density can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric double layer capacitor bank in which a plurality of cylindrical electric double layer capacitor cells are vertically and horizontally arranged in a container and connected in series / parallel.

[0002]

2. Description of the Related Art A conventional electric double layer capacitor has a capacitance several orders of magnitude higher in capacitance density than an aluminum electrolytic capacitor having a withstand voltage of the same level. However, from the viewpoint of the amount of energy that can be stored, the electric double layer capacitor is compared with the lead battery, which is a typical secondary battery, in 1993.
Electricity per weight that can be stored at the time of year is about 1 /
It was about 20. Further, the electric double layer capacitor has a property of being able to efficiently charge and discharge energy in a short period of time due to the principle of physical power storage, and has a very advantageous point as compared with a secondary battery.

Paying attention to the point that this electric double layer capacitor is more advantageous than a secondary battery, in an application requiring rapid charging and discharging such as an electric vehicle, for example, the capacitor is connected in parallel with the battery. Research is being carried out in various fields on the so-called battery assist technology to be used and on the electric double layer capacitors with low internal resistance, which are called for power use. In addition to these studies, it has become possible to manufacture electric double-layer capacitors with a much higher energy density than before (for example, Dio Okamura: Basic Research on Power Storage Devices, The Institute of Electrical Engineers of Japan, Journal Vol.115B). No.5, p504-510,
1995) Further, by combining this electric double layer capacitor and an electronic circuit, it has become possible to manufacture a power storage device having a performance exceeding that of a lead battery.

FIG. 3 is a diagram showing an example of the structure of a conventional electric double layer capacitor, and FIG. 4 is a diagram showing an example of the arrangement of electric double layer capacitor banks. An electric double layer capacitor generally includes a polarizable electrode mainly composed of activated carbon, a collector electrode of aluminum or the like, a separator, and a cell container. For example, the electric double layer capacitor is manufactured by a winding type (roll pan) as shown in FIG. 3) and an electric double-layer capacitor 41 called
There is an electric double layer capacitor 51 called a multilayer type as shown in FIG. Wound type electric double layer capacitor 41
Is, for example, a lead wire 4 from the positive and negative capacitor electrodes 42.
3 also has a structure in which leads are connected to terminals 44 as seen in an aluminum electrolytic capacitor. A multilayer electric double layer capacitor 51 has a lead wire formed by stacking positive and negative capacitor electrodes 52 like a sandwich. This has a structure in which 53 is connected to a terminal 54 by a lead.

[0005]

The basic design of the shape and dimensions of the container of an electric double layer capacitor is particularly important for packing as densely as possible in an allowable space. That is, when the packing density is insufficient, the electric energy that can be stored and stored in a so-called electric double-layer capacitor bank (hereinafter referred to as a bank) as shown in FIG. This is because even if the value is excellent, it will not be different from a small cell as a whole.

Therefore, in order to improve the packing density, various devices such as minimizing the dead space are required. In principle, if a cell of a stacked type, that is, a rectangular container as shown in FIG. 3B is employed, the effective volume ratio of the polarizable electrode in the container can be increased, and thus the dead space is reduced. It has been considered advantageous for the purpose. In addition, not only each cell according to each application purpose but also a case where a large number of cells are accommodated in a bank container and connected in series and in a bank as shown in FIG. It has been considered advantageous.

[0007] However, the cells of the rectangular container have a problem that the mass productivity or workability in the manufacturing process is poor. That is, as represented by an electrolytic capacitor,
The production of the element by the winding type is very adaptable to mechanization, so it is widely used in similar fields and has a long history. Since the shape of the wound type cell is generally cylindrical as shown in FIG. 3A, when a large number of cells are banked in series and parallel, as shown in FIG. There is a problem that the space efficiency of the bank becomes very poor.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to increase the arrangement density of cells in a cylindrical container and improve the space efficiency.

For this purpose, the present invention relates to an electric double-layer capacitor bank comprising a plurality of cylindrical electric double-layer capacitor cells arranged vertically and horizontally in a container and connected in series / parallel, wherein the plurality of cylindrical electric double-layer capacitor cells are provided. The vertical arrangement of the electric double-layer capacitor cells is 60 times oblique with respect to the horizontal arrangement, and is arranged six times symmetrically.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing an embodiment of an electric double layer capacitor bank according to the present invention, wherein 1 is an electric double layer capacitor bank, 2 is a cylindrical electric double layer capacitor cell, 3, 3 ', 3 ". Indicates a bank container.

In FIG. 1, a cylindrical electric double layer capacitor cell 2 is a cylindrical wound cell electric double layer capacitor, and an electric double layer capacitor bank 1 comprises a plurality of cylindrical electric double layer capacitors. The cell 2 is connected in series and parallel. The bank container 3 is a container for housing the electric double layer capacitor bank 1 in which a plurality of cylindrical electric double layer capacitor cells 2 are connected in series and parallel, and the arrangement of the plurality of cylindrical electric double layer capacitor cells 2 is different. With respect to the arrangement in the horizontal direction, the position is in the direction of 60 ° diagonally at the next lower stage,
It is housed in a six-fold symmetrical arrangement. Therefore, in the cylindrical electric double layer capacitor cell 2 arranged in the upper stage and the cylindrical electric double layer capacitor cell 2 arranged in the next lower stage, they are arranged at intermediate positions in the longitudinal direction, respectively.
That is, the cylindrical electric double-layer capacitor cell 2 having three upper and lower stages has a triangular arrangement. The substrate of the circuit component such as the parallel monitor described above is attached to the upper part of the terminal of the cylindrical electric double layer capacitor cell 2, that is, the upper surface of the bank container.

In the case where the electric double layer capacitor bank 1 is configured in a six-fold symmetrical arrangement as described above, a rectangular bank container 3 is used in the example shown in FIG. The example shown in FIG. 1B uses a diamond-shaped bank container 3 ′ having a direction of 60 °, and the example shown in FIG. 1C uses a hexagonal bank container 3 ′. . FIG.
In the bank container 3 shown in (A) and the bank container 3 'shown in FIG. 1B, the number of horizontal arrangements and the number of vertical arrangements are the same,
A plurality of banks can be further arranged side by side in the horizontal direction and the vertical direction and can be expanded without any gap. On the other hand, in the bank container 3 ″ shown in FIG. 1C, assuming that the number of arrangements in the uppermost row in the horizontal direction is n, the number of arrangements increases one by one up to n levels, and conversely, the number of arrangements is one from n + 1 The number of banks can be reduced to n, and a plurality of banks can be radially expanded and arranged corresponding to each side of a hexagon without any gap.

FIG. 2 is a diagram showing an example of the arrangement of a plurality of banks and another example of the configuration of banks. Reference numerals 11 to 13 and 21 to 23 denote banks. In the case of a diamond-shaped bank container 3 'as shown in FIG. 1 (B), it can be expanded in the same shape by arranging it in the same direction in the horizontal and vertical directions, but as shown in FIG. 2 (A). By arranging the banks 12 and 13 with respect to the bank 11 and changing the directions by rotating the banks 12 and 13 by 60 °, the shape can be expanded to a hexagon. Alternatively, as shown in FIG. 2B, the number of electric double-layer capacitor cells may be changed in the horizontal and vertical directions so that one side is longer than the other. As a result, even if the lengths of the sides are different, the sides can be expanded and arranged so that there is no gap between the banks by making the sides of the same length correspond to each other.

Note that the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, in the above embodiment, the electric double layer capacitor cells housed in the bank container are connected in series and
Although it has been described that the bank is configured as a bank, a plurality of bank containers may be further connected in series and parallel to form a large bank, or the bank container may be divided into a plurality of banks and connected in series and parallel. The configuration may be as follows.

[0015]

As is apparent from the above description, according to the present invention, a plurality of cylindrical electric double layer capacitor cells are accommodated in a container, and the cylindrical electric double layer capacitor
Since the cells are arranged six times symmetrically with the vertical direction at an angle of 60 ° to the horizontal direction and connected in series / parallel to form an electric double layer capacitor bank, a cylindrical winding with good mass productivity is provided. By using a round cell, the accommodation density can be increased.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of an electric double layer capacitor bank according to the present invention.

FIG. 2 is a diagram showing an example of the arrangement of a plurality of banks and another example of the configuration of the banks.

FIG. 3 is a diagram showing an example of the structure of a conventional electric double layer capacitor.

FIG. 4 is a diagram showing an arrangement example of an electric double layer capacitor bank.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electric double layer capacitor bank, 2 ... Cylindrical electric double layer capacitor cell, 3, 3 ', 3 "... Bank container

Claims (1)

[Claims] 1. An electric double-layer capacitor bank comprising a plurality of cylindrical electric double-layer capacitor cells arranged vertically and horizontally in a container and connected in series / parallel, wherein said plurality of cylindrical electric double-layer capacitors are provided. An electric double layer capacitor bank, wherein the capacitor cells are arranged six times symmetrically at an oblique angle of 60 [deg.] With respect to the horizontal direction.