JPH0410701B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the structure of a group of electrode plates of a storage battery and its terminal portion, and in particular to a structure in which a strip-shaped electrode plate using an expanded lattice or the like is wound into a substantially oval cross-section. Regarding lead-acid batteries.

Structure of conventional examples and their problems Although some lead-acid batteries use a group of electrode plates wound into a cylindrical shape, as shown in Figure 1, a group of electrode plates with a rectangular cross section is made by stacking flat electrode plates. is the most commonly used.

In Figure 1, 1 is a positive electrode plate, 2 is a negative electrode plate, 3
is a separator.

In such an electrode plate group, the current collector ears 4 and 5 of the positive and negative electrode plates are arranged on the short side of the rectangular electrode plate group, respectively. When simply constructing a multi-cell battery using this electrode plate group, the straps connecting the respective ears 4 and 5 are connected in series with a connector 10 extending between the cells, as shown in FIG. 2. Therefore, the positive and negative terminals 6 and 7 of the battery are located at diagonal corners of the battery case 8. In the figure, the electrode plate group of each cell is shown by 9 and the connector is shown by 10 for simplicity.

Therefore, it is necessary to prepare two types of batteries with different positive and negative terminals to match the structure of the terminal section of the device using the battery. From this point of view, it is desirable for this type of prismatic battery to have the positive and negative terminals located in the center of the left and right sides of the battery case.

FIG. 3 shows a plate group designed to meet this purpose. Here, the current collector ears 4' and 5' of each positive and negative electrode plate are arranged diagonally with respect to the longitudinal direction of the electrode plate group, and if these ears are connected to each other with a strap, the positive and negative electrode straps can be connected to each other. One end is provided at the center of each electrode plate group in the longitudinal direction, and when multiple cells are connected in series with a connector that crosses the partition wall, the positive and negative terminals can be placed at the center of the corresponding sides of the battery case. can.

However, in order to adopt such a configuration, since the positions of the current collecting ears of each electrode plate are different, manufacturing of the electrode plates and assembling the electrode plate group becomes complicated, and it is not suitable for mass production.

OBJECTS OF THE INVENTION It is an object of the present invention to solve the above-mentioned inconveniences and to provide a storage battery having terminals at the center of the left and right sides of a square battery case.

Structure of the Invention The present invention comprises winding a band-shaped positive electrode plate, a negative electrode plate, and a separator to form an electrode plate group having a substantially oval cross section, and the longitudinal sides of the electrode plate group are partitioned by partition walls to separate electrode plates of adjacent cell chambers. The electrode plate group is housed in each cell chamber of the battery case so as to face the group, and the terminal portion of each electrode plate group is configured as follows.

That is, on the end face of the electrode plate group, most commonly on the upper end face, a plurality of current collecting ears are arranged on each positive and negative electrode plate diagonally with respect to the longitudinal direction of the electrode plate group, and a positive current collecting lug is arranged diagonally with respect to the longitudinal direction of the electrode plate group. One end of each of the negative straps is located at the center of different longitudinal sides of the electrode plate group.

According to this configuration, the connector that connects adjacent cells can be arranged at the upper center of the partition wall, and the positive and negative terminals of the battery can be arranged at the center of the opposite left and right sides of the battery case. I can do it. In addition, there is one positive and one negative electrode plate that make up the electrode plate group, and if the design follows the arrangement of the current collecting ears described above, only the designs of the positive and negative types are different, so mass production is possible. It's easy.

Suitable electrode plates used here include an expanded lattice made by cutting and stretching a lead or lead alloy sheet, and a paste-type electrode plate using a lattice made by punching the sheet. These expanded gratings and punched gratings are not only advantageous in making the electrode plate lighter and thinner than cast gratings, but also in manufacturing the grating as a continuous band-shaped sheet.
It is extremely advantageous in terms of productivity because it can be filled with active materials.

According to the present invention, the characteristics of the electrode plate using such an expanded grid or punched grid can be fully exhibited.

DESCRIPTION OF THE EMBODIMENTS FIG. 4 shows an example of the configuration of a plate group according to the present invention.
In the figure, 11 is a strip-shaped positive electrode plate, and 12 is a strip-shaped negative electrode plate, and these electrode plates are formed by filling an expanded lattice with a paste-like active material. These positive and negative electrode plates 11 and 12 and the band-shaped separator 13 are wound into a roll to form an electrode plate group having a substantially oval cross section as shown in the figure.

Reference numeral 14 denotes current collecting ears provided at the upper end of the positive electrode plate 11, and when the electrode plate group is configured as shown in the figure, these ears are placed on the electrode plates so that they are aligned diagonally in a straight line with respect to the longitudinal direction of the group. The grid is designed. Similarly, current collecting ears 15 are arranged diagonally at the upper end of the negative electrode plate 12. These current collecting ears are arranged so that the ones closest to the left and right sides of the electrode plate group are located approximately in the center of the sides.

FIG. 5 shows a lead-acid battery having a three-cell series connection configuration using the above-mentioned electrode plate group 16. In this figure, only the outer shape of the electrode plate group is shown.

Reference numeral 17 is a battery case having three cell chambers a, b, and c partitioned by a partition wall d. Reference numeral 18 indicates a strap to which the current collecting tab 14 on the positive electrode side of each electrode plate group is connected;
Reference numeral 9 denotes a strap to which the current collecting lug 15 on the negative electrode side is connected. 20 is a negative electrode side strap 19 and a positive electrode side strap 18 of two adjacent cells with a partition wall d interposed therebetween.
This is a connector that connects the 21 is cell room a
The positive terminal connected to the positive side strap 18 of
Reference numeral 2 designates a negative electrode terminal connected to the negative electrode side strap 19 of the cell chamber c, and is located approximately at the center of the opposing left and right side surfaces of the battery case. In the figure, terminal 2
1 and 22 are shown protruding from the outer surface of the battery case, but normally they are taken out to the top surface of the battery case lid.

Effects of the Invention According to the present invention, by designing the positive and negative electrode plates, the terminal part can be provided not at the corner of the battery case but near the center of the left and right ends of the battery case. It can be easily adapted to the equipment used, and mass production of batteries is also facilitated.

[Brief explanation of drawings]

Fig. 1 is a plan view of a conventional electrode plate group, Fig. 2 is a plan view showing an outline of a battery configuration using the same electrode plate group, and Fig. 3 is a plan view of a conventional electrode plate group.
4 is a plan view showing a conventional electrode plate group, FIG. 4 is a plan view showing a electrode plate group according to the present invention, and FIG. 5 is a plan view schematically showing a battery configuration using the same electrode plate group. 11... Positive electrode plate, 12... Negative electrode plate, 13... Separator, 14, 15... Current collecting lug, 16... Electrode plate group, 17... Battery case, 18, 19... Strap,
20... Connector, 21, 22... Terminal.

Claims (1)

[Scope of Claims] 1. A storage battery comprising a plate group 16 consisting of a positive plate, a negative plate, and a separator, straps 18 and 19, a connector 20 for connecting the straps, and a battery case 17, comprising: 16 is wound to have a substantially oval cross section, and a plurality of positive and negative current collecting ears 14 and 15 are arranged diagonally with respect to the longitudinal direction of the electrode plate group 16 on one end surface thereof, and One current collecting ear 14 is terminated at the center of one side, and the other current collecting ear 15 is terminated at the center of the other side, and the battery is housed in a battery case 17 partitioned into a plurality of cell chambers by a partition wall d. It is
The straps 18 and 19 are the current collecting ears 1 of the electrode plate group 16.
4 and 15, respectively, and the connector 20 crosses the center of the upper end of the partition wall d, and has one end connected to the strap 18 and the other end connected to the other strap 19 of the adjacent electrode plate group through the partition wall.