JPH09219187A - Sealed storage battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the fluctuation of a characteristic to improve the degree of freedom of connection, by housing cell rows, wherein plural cells and adjoining one direction, in one battery jar in parallel, to connect adjoining and mating cells of the respective cell rows and among cells in parallel, to provide positive and negative electrode terminals on the battery lid at every cell. SOLUTION: A cell row 1, wherein two cells 1a and 1b are arranged in one direction, and a cell row 2, wherein similarly cells 2a and 2b are arranged, and adjoined with each other in parallel, to be provided on a mono-block battery jar 8. The adjoining and mating cells of the respective cells rows are connected in parallel by in-cell row connecting members 4a, 4b, and 5a, 5b; to connect adjoing cell rows 1 and 2, by 'cell row'-to-'cell row' connecting members 7a and 7b. Moreover, respective positive and negative electrode terminals + and -, are provided onto the battery jar lid, to output capacity four times a cell by voltage 2V in a lead storage battery. This reduces the fluctuation of a characteristic of every cell, to make all cells dischargeable, despite selecting positive and negative electrode terminals of any cell, thereby increasing the degree of freedom of connection.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed storage battery. More specifically, the present invention relates to a stationary storage battery, particularly a lead storage battery, which is used by combining a large number of batteries for a long period of time.

[0002]

2. Description of the Related Art In recent years, a sealed stationary lead-acid battery has been used as a backup power source for telephone exchanges and computers, emergency lighting power sources for buildings, power distribution facilities, substation power sources, and the like. Since high voltage and large capacity are required for these power supplies, high voltage,
Large capacity is desirable. However, when the size of the electrode plate is increased, current collection efficiency is deteriorated and the deflection of the electrode plate in use is increased. In addition, in a storage battery that will be used for a long period of time, increasing the number of laminated electrode plates that make up the electrode plate group has a mechanical strength that can maintain a constant electrode plate group pressure that greatly affects battery life and performance. It is difficult to make a battery case.

Therefore, a lead-acid battery as shown in FIG. 8 has been put into practical use for the conventional use of this kind. This lead acid battery uses a monoblock battery case in which two rows of cells are arranged in parallel. That is, the monoblock battery case 60 has a configuration in which a cell row 61 having cells 61a and 61b and a cell row 62 having cells 62a and 62b are arranged in parallel. The monoblock battery case is sealed by a single battery case lid. Each cell is partitioned by a partition provided on the battery case and the battery case lid, and each cell has a positive electrode terminal and a negative electrode terminal on the upper surface of the battery case lid. In addition, the cell 61a in one cell row 61
And 61b, the negative electrode terminals are connected to each other by the connection bar 63 embedded in the filler in the recess provided on the upper surface of the battery case lid. To use this battery as a power supply device, in each battery, adjacent cells in different cell rows are connected in parallel, and these batteries are connected in series with each other. Thus, a plurality of batteries are connected in series to form an assembled battery, and a plurality of the assembled batteries are connected in series and / or in parallel to form a high-voltage, large-capacity power supply device.

In the above battery, each cell 61
Since a, 61b, 62a, and 62b are independent, if there is a variation in characteristics between cells during use, especially when there is a variation in capacity,
Excessive load is applied to a specific cell with a small capacity. Therefore, there is a disadvantage that the life of the specific cell is further shortened. Further, in order to make all four cells of one battery participate in discharging, it is necessary to select a specific terminal, and when connecting a large number of batteries, it is necessary to be careful not to make a mistake in selecting the terminal.

[0005]

SUMMARY OF THE INVENTION In view of the above, the present invention has a small variation in characteristics between cells, and can discharge all cells regardless of which cell's positive terminal or negative terminal is selected. The purpose is to provide a stable storage battery.

[0006]

A sealed type storage battery of the present invention is a monoblock battery case in which at least two cell rows in each of which a plurality of cells are connected in one direction are adjacently provided in parallel,
A battery case lid that seals the opening of the battery case, a connection member in a cell line that connects adjacent cells in each of the cell lines in parallel, and a cell line that connects adjacent cells in different cell lines in parallel It is provided with a connecting member, and a positive electrode terminal and a negative electrode terminal provided on the battery case lid corresponding to each cell.

Further, the sealed lead-acid battery of the present invention is (a)
Corresponding to a monoblock battery case in which at least two cell rows in which a plurality of cell chambers partitioned by partition walls are continuous in one direction are adjacent to each other and in parallel, (b) a partition wall that partitions each cell chamber of the battery case And a partition for partitioning cells in the same cell row, and an opening is provided in the partition to close the opening of the cell, and (c) a plurality of positive electrode plates in the cell row direction in the cell row and Negative electrode plates are laminated via a separator, a group of electrode plates housed in each cell chamber, (d) provided above the respective electrode plate groups so as to project above the opening of the battery case,
Positive electrode and negative electrode shelves connecting positive electrode plates to each other and negative electrode plates to each other, (e) In-cell-row connecting member in which shelves of the same polarity of adjacent cells in each of the cell columns are connected through the openings of the partition walls. , (F) a positive electrode terminal and a negative electrode terminal, which are connected to the positive electrode shelf and the negative electrode shelf corresponding to each cell and are provided so as to project on the battery case lid, and (g) different cell rows. And an inter-cell-row connecting member in which the adjacent cells are connected in parallel on the battery case lid.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described. In the sealed storage battery shown in FIG. 1, a cell row 1 in which two cells 1a and 1b are connected in one direction and a cell row 2 in which cells 2a and 2b are also connected are provided adjacent to each other and in parallel. It has a monoblock battery case 8. The opening of the battery case 8 is sealed by a battery case lid, but the battery case lid is not shown in the figure. Adjacent cells in each cell row are connected to each other within the cell row connecting members 4a, 4b, and 5a, 5
They are connected in parallel by b. Adjacent cells in different cell rows are connected in parallel by inter-cell row connecting members 7a and 7b. A positive electrode terminal and a negative electrode terminal are provided on the battery case lid corresponding to each cell.

In the storage battery constructed in this way, regardless of which cell has the positive electrode terminal and the negative electrode terminal, the cell row 1 in which the cells 1a and 1b are connected in parallel and the cell row 2 in which the cells 2a and 2b are connected in parallel are arranged in parallel. It functions as a battery connected to. That is, the lead storage battery has a voltage of 2 V and a capacity four times that of one cell. As described above, since the positive electrode terminal and the negative electrode terminal are the same in any cell, when connecting a number of batteries in parallel and / or in series to form a high-voltage, large-capacity power supply device, the connection of Greater freedom and convenience. Further, according to this configuration, all the cells can be uniformly involved in the discharge.

In the above example, a configuration is shown in which two cell rows of two cells are arranged in parallel. FIG. 2 shows a battery having a configuration in which three cell rows of two cells are arranged in parallel. In this battery, a cell row 3 having cells 3a and 3b is arranged in parallel in the cell rows 1 and 2. Cells 3a and 3b in cell row 3
And are connected in parallel by the in-cell connecting members 6a and 6b. Further, adjacent cells in different cell rows are connected in parallel. That is, cell 1a,
The cells 2a and 3a are connected in parallel by the cell row connecting member 7a, and the cells 1b, 2b and 3b are connected in parallel by the cell row connecting member 7b.

Similarly, FIG. 3 shows a configuration in which two cell rows of three cells are arranged in parallel. This battery has cells 1a, 1
A cell row 1 having b and 1c and a cell row 2 having cells 2a, 2b and 2c are arranged in parallel.
Then, adjacent cells in the same cell row are connected in parallel by the cell row connecting members 4a and 4b or 5a and 5b,
Adjacent cells in different cell rows are connected in parallel by inter-cell row connecting members 7a, 7b, or 7c. In addition, a plurality of cell rows of a plurality of cells can be arranged in parallel, such as a configuration in which three cell rows of three cells are arranged in parallel. However, as the number of cells increases, the central cell surrounded by some cells has a different heat dissipation condition from other cells, and thus a temperature difference occurs as charging and discharging are repeated. As a result, there will be a difference in performance between cells. Most preferred is a 4-cell configuration as shown in FIG.

FIG. 4 shows an electrical connection diagram of an example in which three batteries having a 4-cell structure as shown in FIG. 1 are connected in series. In the batteries each having the battery case 8, adjacent cells in different cell rows are connected in parallel by connecting the negative electrode terminals or the positive electrode terminals with the cell row connecting member 7a or 7b as described above. ing. In this example, these parts are further connected by an external connecting member, and when the negative electrode terminals are connected by the cell row connecting member 7a, the positive electrode terminals are further connected, and the positive electrode terminals are connected between the cell row. When they are connected by the member 7b, the negative electrode terminals are further connected by external connecting members. By doing so, IR drop at the connection portion is suppressed. The battery device in which the three batteries are connected in series supplies power from the negative electrode terminal 9a and the positive electrode terminal 9b.

According to the present invention, since the intra-cell row connection member and the inter-cell row connection member are used, one connection member, preferably the intra-cell row connection member, is placed inside the battery case lid so that the two do not intersect. It is preferable to dispose the other connecting member, that is, the inter-cell-row connecting member on the battery case lid. In this case, a recess is provided on the battery case lid, the inter-cell row connecting member is arranged in this recess, and an insulative filler is filled on the recess to expose the inter-cell row connecting member on the surface of the battery case. It is preferable not to do so.

Further, it is preferable that adjacent cells in each cell row have their gas phase portions communicating with each other.
When the gas phase portion of each cell is independent, as in a normal battery, the absorption reaction of oxygen gas generated during charging may vary from cell to cell, which causes a difference in the performance of each cell. It appears in the performance of. When the gas phase portion of each cell communicates with each other, the generation and absorption of oxygen gas are performed as if they were in one cell, so that the generation and absorption of oxygen gas does not differ from cell to cell in the cell performance.
That is, it is the same as if each cell in the cell array works equally. It is preferable that the partition wall for partitioning adjacent cells in each cell row has a hole for communicating the cells at the bottom thereof. Combined with the structure in which the gas phase portions of the adjacent cells communicate with each other as described above, by aligning the liquid surfaces during injection, the amount of electrolyte in each cell can be regulated to a constant level, so that the cell performance is uniform. To help you.

[0015]

EXAMPLES Examples in which the present invention is applied to a lead acid battery will be described below. It goes without saying that the present invention can be applied not only to lead storage batteries but also to sealed alkaline storage batteries such as nickel-cadmium storage batteries and nickel-hydrogen storage batteries. FIG. 5 is a perspective view showing the overall configuration of the lead storage battery according to the present invention, and FIG. 6 is a perspective view in which a part of a monoblock battery case accommodating an electrode plate group in each cell chamber is cut away. FIG. 7 shows FIG.
FIG. 7 is a sectional view taken along line VII-VII ′ of FIG. The battery shown here shows a specific configuration example of the battery of FIG. 1 described above.

Monoblock battery case 10 made of ABS resin
Arranges in parallel a cell row 11 in which the cell chambers 11a and 11b are connected in one direction and a cell row 12 in which the cell chambers 12a and 12b are connected in one direction. The cell chamber 11a and the cell chamber 11b in the same cell row, and the cell chamber 12a and the cell chamber 12b are partitioned by a partition wall 13. In addition, adjacent cell chambers 11a and 12a and cell chambers 11b and 12b in different cell rows are partitioned by a partition wall 14. The four cell chambers 11a, 11b, 12a, and 12b have electrode plate groups 15a, 15b, 16 respectively.
a and 16b are accommodated.

These electrode plate groups are formed by stacking a positive electrode plate 21 and a negative electrode plate 22 with a separator 23 in the same direction as the direction in which the cell chambers in each cell row are connected. 20 kg / d in the stacking direction
It is inserted into the cell chamber so that a group pressure of m ² is applied.
Then, each electrode plate group includes the ear portion 24 of the positive electrode plate 21 and the negative electrode plate 2.
Two ears 25 project above the opening of the battery case, each ears are connected to a shelf, and the positive and negative terminals made of lead-tin alloy are connected to the shelves. That is, the electrode plate groups 15a and 15b include the positive electrode side shelves 17a and 17b and the negative electrode side shelves 18a and 18b, respectively.
Having. Further, the electrode plate groups 16a and 16b have positive electrode side shelves 19a and 19b and negative electrode side shelves 20a and 20b, respectively. The positive electrode plate and the negative electrode plate used here are obtained by filling a casting grid made of a lead-calcium-tin alloy with a paste mainly containing lead powder, aging, drying, and then subjecting it to chemical conversion treatment. A glass fiber mat was used as the separator.

In each cell row, the electrode plate groups are connected in parallel. That is, the cell chamber 1
Electrode plate group 15a in 1a and electrode plate group 15b in cell chamber 11b
Means that the shelves 17a and 17b on the positive electrode side are the connection members 3 in the cell row.
7 and the negative-side shelves 18a and 18b are connected above the partition wall 13 by the in-cell connecting member 38. Further, the electrode plate group 16a in the cell chamber 12a
And the electrode plate group 16b in the cell chamber 12b are the shelf 19 on the positive electrode side.
a and 19b are connected above the partition wall 13 by the cell row connecting member 39 made of lead or lead alloy, and the negative-side shelves 20a and 20b by the cell row connecting member 40. Furthermore, each electrode plate group 15a,
15b, 16a and 16b are shelves 17a, 17b and 19
Positive terminals 41a, 41b, 43a, 43b on a and 19b
And has negative electrodes 42a, 42b, 44a, 44b on the shelves 18a, 18b, 20a, 20b.

Each of the positive electrode plate 21 and the negative electrode plate 22 has a pair of legs 26, 26 and 27, 27 at the bottom thereof.
In addition, four sets of saddles 28, 29, and
30 and 31. Then, the foot 2 of the positive electrode plate 21
Of the six, the foot farther from the ears 24 of the positive electrode plate rests on the saddle 29, while the other foot does not rest on the saddle. Negative electrode plate 2
The two feet 27, 27 rest on saddles 29, 31, respectively. Further, on the upper part of the electrode plate group, inside the ears 24 and 25, a splashproof paper 32 formed mainly of synthetic resin fibers is placed. The splash paper 32 prevents the electrolytic solution from scattering at the time of initial charging.

On the other hand, the battery case lid 33 for sealing the opening of the battery case
Has partition walls 34 and 35 corresponding to the partition walls 13 and 14 of the battery case, respectively. Further, the partition wall 34 has openings 36, 36 cut out for passing the connection member in the cell row. These openings also have a role of connecting the gas phase portions of adjacent cells in the same cell row. Further, the battery case lid has a bushing for connecting to the positive electrode terminal and the negative electrode terminal, and a safety valve 45 corresponding to each cell chamber. The safety valve 45 has a cap-shaped rubber valve inside for releasing gas into the atmosphere when the pressure inside the cell rises due to gas generation and for preventing oxygen in the atmosphere, in particular, from flowing into the cell. Further, the partition wall 13 of the battery case 10 has a through hole 46 that connects adjacent cell chambers of the same cell row.

To assemble this battery, first, the electrode plate group is inserted into each cell chamber of the battery case 10 as described above, and the electrode plate groups of the same cell row are connected in parallel. Next, the battery case is covered with the battery container cover and bonded. Since the opening of the battery case 10 is provided with a concave groove and the opening of the battery case lid 33 is provided with a convex portion which fits into the concave groove, the concave groove is filled with an epoxy adhesive. After that, if the battery case lid is covered, both are firmly adhered by the adhesive agent interposed between them. Further, since each terminal of the electrode plate group is fitted to the bushing portion of the battery case lid, the lead-tin alloy terminal is welded to the bushing.

Next, adjacent cells of different cell rows are connected in series by the cell row connecting member. That is, the negative electrode terminal 42a of the cell chamber 11a and the negative electrode terminal 44a of the cell chamber 12a are connected by the inter-cell-row connecting member 47a.
1b positive electrode terminal 41b and cell chamber 12b positive electrode terminal 43b
And the cell row connecting member 47b. The upper surface of the battery case lid 33 is provided with recesses 48a and 48b for accommodating the inter-cell-row connecting members 47a and 47b. Although not shown, the recesses 48a and 48b are filled with an insulating filler such as epoxy resin. It is filled so that the inter-cell-row connecting member is not directly exposed on the container lid. Further, as shown in FIG. 5, a filling material such as epoxy resin is also filled in the recesses that hold the positive electrode terminal and the negative electrode terminal to prevent leakage of the electrolytic solution from the gap between the terminal portion and the battery case lid. . As a result, the battery case lid 33
The upper surface of the cell has a positive electrode terminal and a negative electrode terminal corresponding to each cell, and a battery in which four cells are arranged in parallel is configured by the connection member in the cell row and the connection member between the cell rows. As the cell row connecting members 47a and 47b, for example, a copper plate coated with a lead alloy is used.

Next, an electrolytic solution made of dilute sulfuric acid having a specific gravity of 1.26 is injected into each cell chamber from the hole portion of the battery case lid to which the safety valve is attached. At this time, since a glass fiber separator is used, it takes time for the electrolytic solution to be absorbed by the electrode plate group. However, since the through-hole 46 is provided in the partition 13 of the battery case and the opening 36 is provided in the partition 34 of the battery cover, the amount of liquid injected into the cell chambers of the same cell row can be made uniform. . Install the safety valve about 1 hour after the injection. Then, the electrode plate group is initially charged with a current of 0.05 C for 10 hours. Then, after discharging with a current of 0.1 C,
By charging the battery at a constant current of 0.1 C for 13 hours, the storage battery is completed by adjusting so that substantially no free electrolytic solution exists.

As described above, according to the present invention, there is little variation in the characteristics of each cell, and it is possible to discharge all cells regardless of which cell's positive terminal and negative terminal are selected. Can be provided. Therefore, the sealed storage battery of the present invention is convenient because the degree of freedom in connection is increased when a large number of batteries are connected in parallel and / or in series to form a high-voltage, large-capacity power supply device.

[Brief description of drawings]

FIG. 1 is a diagram showing an arrangement of cells and an electrical connection relationship of a sealed storage battery according to an embodiment of the present invention.

FIG. 2 is a diagram showing an arrangement of cells and an electrical connection relationship of a sealed storage battery according to another embodiment of the present invention.

FIG. 3 is a diagram showing an arrangement of cells and an electrical connection relationship of a sealed storage battery according to still another embodiment of the present invention.

FIG. 4 is a diagram showing an electrical connection relationship of a battery device in which three sealed storage batteries shown in FIG. 1 are connected in series.

FIG. 5 is a perspective view showing the overall configuration of a lead storage battery according to the present invention.

FIG. 6 is a perspective view in which a monoblock battery case of the battery is partially cut away.

7 is a sectional view taken along line VII-VII ′ of FIG.

FIG. 8 is a diagram showing a cell arrangement and an electrical connection relationship of a conventional sealed storage battery.

[Explanation of symbols]

1, 2, 3 Cell rows 1a, 1b, 1c, 2a, 2b, 2c, 3a, 3b Cells 4a, 4b, 5a, 5b, 6a, 6b Cell row connecting members 7a, 7b, 7c Cell row connecting members 8 Battery case 9a, 9b Terminal 10 Monoblock battery case 11, 12 Cell row 11a, 11b, 12a, 12b Cell chamber 13, 14 Partition wall 15a, 15b, 16a, 16b Electrode plate group 17a, 17b, 18a, 18b, 19a, 19b Two
0a, 20b Shelf 21 Positive electrode plate 22 Negative electrode plate 23 Separator 24, 25 Ears 26, 27 Feet 28, 29, 30, 31 Saddle 32 Splashproof plate 33 Battery case lid 34, 35 Partition wall 36 Opening 37, 38, 39, 40 Intra-cell connecting member 41a, 41b, 43a, 43b Positive electrode terminal 42a, 42b, 44a, 44b Negative electrode terminal 45 Safety valve 46 Through hole 47a, 47b Inter-cell connecting member 48a, 48b Recess

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiroshi Sugiyama 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (10)

[Claims] 1. A monoblock battery case in which at least two cell rows in each of which a plurality of cells are connected in one direction are provided adjacent to each other and in parallel, a battery case lid in which an opening of the battery case is sealed, and each of the above. In-cell-row connecting member in which adjacent cells in a cell row are connected in parallel, between-cell-row connecting member in which adjacent cells in different cell rows are connected in parallel, and on a battery case lid corresponding to each cell A sealed type storage battery having a positive electrode terminal and a negative electrode terminal provided in the. 2. The sealed storage battery according to claim 1, wherein the intra-cell-row connecting member is arranged inside the battery case lid, and the inter-cell-row connecting member is arranged on the battery case lid. 3. The sealed storage battery according to claim 2, wherein the inter-cell-row connecting member is arranged in a recess provided on the upper surface of the battery case lid and covered with an insulative filler. 4. The sealed storage battery according to claim 1, wherein adjacent cells in the cell row communicate with each other in a gas phase portion thereof. 5. The sealed storage battery according to claim 4, wherein the partition wall for partitioning adjacent cells in the cell row has a hole at the bottom for communicating the cells with each other. 6. The number of cells in the cell row is 2.
The sealed storage battery according to any one of to 5. 7. A plurality of cell chambers partitioned by partition walls adjoining at least two cell rows that are continuous in one direction,
And a monoblock battery case provided in parallel, and having a partition wall corresponding to the partition wall that partitions each cell chamber of the battery cell, an opening is provided in the partition wall that partitions cells in the same cell row, and the opening of the battery container is sealed. The battery case lid, a plurality of positive electrode plates and negative electrode plates are laminated in the cell connecting direction in the cell row via a separator, the electrode plate group housed in each cell chamber, and the battery case on the upper part of each electrode plate group. Positive electrode and negative electrode shelves that are provided so as to project upward from the openings and connect the positive electrode plates to each other and the negative electrode plates to each other, and the shelves of the same polarity of the adjacent cells in each of the cell rows through the opening of the partition wall. Connected member in connected cell row, positive electrode terminal and negative electrode terminal which are respectively connected to the positive electrode shelf and the negative electrode shelf corresponding to each cell, and are provided so as to project on the container lid, and different cells In line Sealed lead acid battery having a cell column interconnection members connected in parallel in adjacent cells to each other to the container on the lid that. 8. The sealed lead acid battery according to claim 7, wherein the partition wall for partitioning adjacent cells in the cell row has a hole at the bottom thereof for communicating the cells with each other. 9. The sealed storage battery according to claim 7, wherein the inter-cell-row connecting member is arranged in a recess provided on the upper surface of the battery case lid and covered with an insulating filler. 10. The sealed lead-acid battery according to claim 7, 8 or 9, wherein the number of cells in the cell row is 2 and the number of cell rows is 2.